CN110470562B

CN110470562B - Humidity control device, air quality monitor and method

Info

Publication number: CN110470562B
Application number: CN201910767516.1A
Authority: CN
Inventors: 高建民; 樊海春
Original assignee: TIANJIN TONGYANG TECHNOLOGY DEVELOPMENT CO LTD
Current assignee: TIANJIN TONGYANG TECHNOLOGY DEVELOPMENT CO LTD
Priority date: 2019-08-19
Filing date: 2019-08-19
Publication date: 2020-09-15
Anticipated expiration: 2039-08-19
Also published as: CN110470562A

Abstract

The embodiment of the invention discloses a humidity control device for air quality monitoring, an air quality monitor and a method, wherein the device comprises: the humidity exchange module realizes the humidity exchange of the original sampling airflow and the blowback airflow through a proton exchange membrane to obtain a target sampling airflow; the humidity adjusting module forms blowback air flow and adjusts the humidity value of the blowback air flow through the adjustable air valve; the air pump forms negative pressure sampling and provides an air outlet for target sampling airflow and blowback airflow; the control module adjusts the opening of the adjustable air valve according to the humidity value of the target sampling air flow so as to enable the humidity value of the target sampling air flow to be within a preset humidity range, and controls the working state of the air pump. The embodiment of the invention adopts the mode that the target sampling air flow and the humidifying air flow are mixed to form the back blowing air flow, and the humidity value and the flow of the back blowing air flow are adjusted through the adjustable air valve, thereby realizing the control of the humidity exchange direction and the efficiency of the proton exchange membrane and ensuring that the humidity value of the target sampling air flow is maintained in the preset humidity range.

Description

Humidity control device, air quality monitor and method

Technical Field

The embodiment of the invention relates to the field of air quality monitoring, in particular to a humidity control device, an air quality monitor and a method for air quality monitoring.

Background

In recent years, with the increasing progress of industrialization and urbanization, the pollution of particulate matters in the air is increased. Because particulate pollution in the air not only has adverse effect on human health, but also has important influence on visibility, acid sedimentation, atmospheric radiation balance, chemical reaction of stratosphere and troposphere and the like, in order to guarantee human health and objectively reflect air quality, the air quality needs to be monitored, namely, the concentration of particulate matters in the air is monitored.

In the prior art, the concentration of particulate matter in air is generally monitored by a mass method. Mass methods such as the oscillating balance method. However, it has been found that the prior art has at least the following drawbacks: at different humidity values, the determined concentration of particulate matter in the sampled airflow will be subject to errors because the particulate matter in the sampled airflow will absorb unequal amounts of moisture. I.e. the accuracy of the determined concentration of particulate matter in the sample gas flow is not high.

Disclosure of Invention

The embodiment of the invention provides a humidity control device, a humidity control system and a humidity control method for air quality monitoring, which are used for maintaining the humidity value of a target sampling air flow to be constant, and further improving the accuracy of determining the concentration of particulate matters in the target sampling air flow.

In a first aspect, an embodiment of the present invention provides a humidity control device for air quality monitoring, including: the humidity control system comprises a humidity exchange module, a humidity adjusting module, an air pump and a control module; the humidity exchange module comprises a humidity exchange pipeline, and the humidity exchange pipeline comprises a proton exchange membrane; the humidity adjusting module comprises a first temperature and humidity sensor, a humidifier and an adjustable air valve; the humidity exchange module, the humidity adjusting module and the air pump are connected in pairs respectively, and the control module is connected with the humidity exchange module, the humidity adjusting module and the air pump respectively;

the humidity exchange module is used for realizing humidity exchange between an original sampling air flow and a blowback air flow through the proton exchange membrane to obtain a target sampling air flow, the target sampling air flow is a sampling air flow with a humidity value within a preset humidity range, and the blowback air flow is formed by mixing the target sampling air flow and a humidifying air flow formed by the humidifier;

the humidity adjusting module is used for forming a blowback air flow and adjusting the humidity value of the blowback air flow through the adjustable air valve;

the air pump is used for forming negative pressure sampling and providing an air outlet for the target sampling airflow and the blowback airflow;

the control module is used for controlling the first temperature and humidity sensor to collect the humidity value of the target sampling airflow, adjusting the opening degree of the adjustable air valve according to the humidity value of the target sampling airflow so as to enable the humidity value of the target sampling airflow to be within a preset humidity range, and controlling the working state of the air pump.

In a second aspect, the embodiment of the present invention further provides an air quality monitor; the air quality monitor comprises a humidity control device for air quality monitoring according to the first aspect of the embodiment of the invention, and further comprises a particulate matter sensor; the humidity adjusting module further comprises a flow informing module and a second filter; the second filter is respectively connected with the flow controller and the particulate matter sensor, and the flow controller is also connected with the control module;

the particle sensor is used for collecting the concentration of particles in the target sampling airflow;

the second filter is used for filtering the target sampling airflow;

the control module is further configured to control the flow controller to maintain a constant flow of the target sample gas stream through the particulate matter sensor.

In a third aspect, an embodiment of the present invention further provides a humidity control method for air quality monitoring, where the humidity control method for air quality monitoring is applied to the humidity control device for air quality monitoring according to the first aspect of the embodiment of the present invention, where the adjustable air valves include a first adjustable air valve, a second adjustable air valve, and a third adjustable air valve; the humidity adjusting module comprises a blowback airflow temperature control unit; the preset humidity range is a humidity range formed by a first humidity threshold and a second humidity threshold, and the first humidity threshold is smaller than the second humidity threshold; the humidity control method for air quality monitoring comprises the following steps:

controlling the first temperature and humidity sensor to acquire the humidity value of the target sampling airflow through a control module;

determining, by the control module, that the humidity value of the target sampled airflow is greater than or equal to the second humidity threshold, increasing, by the control module, the heating amplitude of the blowback airflow temperature control unit, increasing the opening degree of the first adjustable air valve, decreasing the opening degree of the third adjustable air valve, and decreasing at least one of the opening degrees of the second adjustable air valve until the humidity value of the target sampled airflow is within the preset humidity range;

and determining that the humidity value of the target sampling air flow is smaller than or equal to the first humidity threshold value through the control module, and reducing the heating amplitude of the blowback air flow temperature control unit through the control module, reducing the opening degree of the first adjustable air valve, increasing the opening degree of the third adjustable air valve, and increasing at least one of the opening degrees of the second adjustable air valve until the humidity of the target sampling air flow is within the preset humidity range.

The embodiment of the invention is provided with a humidity control device for monitoring the air quality, which comprises a humidity exchange module, a humidity adjusting module, an air pump and a control module, wherein the humidity exchange module comprises a humidity exchange pipeline, the humidity exchange pipeline comprises a proton exchange membrane, the humidity adjusting module comprises a first temperature and humidity sensor, a humidifier and an adjustable air valve, the humidity exchange module is used for realizing the humidity exchange of an original sampling air flow and a blowback air flow through the proton exchange membrane to obtain a target sampling air flow, the target sampling air flow is a sampling air flow with the humidity value within a preset humidity range, the blowback air flow is formed by mixing the target sampling air flow and the humidifying air flow formed by the humidifier, the humidity adjusting module is used for forming the blowback air flow and adjusting the humidity value of the blowback air flow through the adjustable air valve, the air pump is used for forming negative pressure sampling and providing an air outlet for the, the control module is used for controlling the humidity value of the target sampling air flow collected by the first temperature and humidity sensor, adjusting the opening degree of the adjustable air valve according to the humidity value of the target sampling air flow so as to enable the humidity value of the target sampling air flow to be within a preset humidity range, and controlling the working state of the air pump.

Drawings

FIG. 1 is a schematic diagram of a humidity control device for air quality monitoring according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of another humidity control device for air quality monitoring according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of an air quality monitor according to an embodiment of the present invention;

FIG. 4 is a flow chart of a humidity control method for air quality monitoring in an embodiment of the present invention;

fig. 5 is a flow chart of another humidity control method for air quality monitoring in an embodiment of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and not restrictive thereof, and that various features described in the embodiments may be combined to form multiple alternatives. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

Fig. 1 is a schematic structural diagram of a humidity control apparatus for air quality monitoring according to an embodiment of the present invention, which is applicable to a case where a humidity value of a sampled airflow is maintained within a preset humidity range. As shown in fig. 1, the humidity control apparatus 1 for air quality monitoring may specifically include a humidity exchange module 10, a humidity adjustment module 11, an air pump 12 and a control module 13, and the structure and function of the humidity exchange module are explained below.

The humidity exchanging module 10 may specifically include a humidity exchanging pipeline 100, and the humidity exchanging pipeline 100 may specifically include a proton exchanging membrane 1000. The humidity adjustment module 11 may specifically include a first temperature and humidity sensor 110, a humidifier 111, and an adjustable air valve 112.

The humidity exchange module 10, the humidity adjusting module 11 and the air pump 12 can be connected two by two respectively, and the control module 13 can be connected with the humidity exchange module 10, the humidity adjusting module 11 and the air pump 12 respectively.

The humidity exchanging module 10 may be configured to exchange humidity of the original sampling airflow and the blowback airflow through the proton exchange membrane 1000 to obtain a target sampling airflow, where the target sampling airflow may be a sampling airflow whose humidity value is within a preset humidity range, and the blowback airflow may be formed by mixing the target sampling airflow and a humidified airflow formed by the humidifier 111.

The moisture conditioning module 11 may be used to create the blowback air stream and to adjust the moisture level of the blowback air stream via the adjustable air valve 112.

The air pump 12 may be used to create a negative pressure sample and may provide an air vent for the target sample air flow and the blowback air flow.

The control module 13 may be configured to control the first temperature and humidity sensor 110 to collect a humidity value of the target sampling airflow, and adjust the opening of the adjustable air valve 112 according to the humidity value of the target sampling airflow so as to make the humidity value of the target sampling airflow within a preset humidity range, and control the operating state of the air pump 12.

In the embodiment of the present invention, in order to improve the accuracy of the determined concentration of particulate matter in the target sampling air flow, the key point is to maintain the humidity value of the target sampling air flow constant, that is, the humidity control apparatus 1 for improving the accuracy of the determined concentration of particulate matter in the target sampling air flow for monitoring the air quality by maintaining the humidity value of the target sampling air flow constant may include a humidity exchanging module 10, a humidity adjusting module 11, an air pump 12, and a control module 13. The humidity exchanging module 10 may include a humidity exchanging pipeline 100, and the humidity exchanging pipeline 100 may include a proton exchanging membrane 1000. The humidity conditioning module 10 may include a first temperature and humidity sensor 110, a humidifier 111, and an adjustable gas valve 112. It should be noted that the control module 12 may be connected to the humidity exchanging module 10, the humidity adjusting module 11, and the air pump 12, respectively. Specifically, the output end of the control module 12 may be connected to the humidity exchanging module 10, the control end of the first temperature/humidity sensor 110, and the control end of the adjustable air valve 112, respectively. Air paths can be connected among the humidity exchange module 10, the humidity adjusting module 11 and the air pump 12. Accordingly, the humidity exchanging module 10 may be connected to the humidity adjusting module 11, the humidity exchanging module 10 may be connected to the air pump 12, and the humidity adjusting module 11 may be connected to the air pump 12. Specifically, the humidity exchanging module 10 may be connected to the humidity adjusting module 11 through an air path, and the humidity exchanging module 10 may be connected to the air pump 12 through an air path.

The humidity exchange module 10 realizes humidity exchange between the original sampling airflow and the blowback airflow through the proton exchange membrane 1000 to obtain a target sampling airflow, which can be understood as follows: the raw sample air flow may refer to air entering the humidity control device. The blowback gas flow may be formed by mixing a target sample gas flow and a humidified gas flow, wherein the humidified gas flow may be formed after passing through the humidifier 111. The target sampled airflow may refer to a sampled airflow having a humidity value within a preset humidity range. The predetermined humidity range is understood to be a humidity range formed by a first humidity threshold value and a second humidity threshold value, wherein the first humidity threshold value can be smaller than the second humidity threshold value. The preset humidity range may be set according to actual conditions, and is not specifically limited herein, that is, the first humidity threshold and the second humidity threshold may be set according to actual conditions, and are not specifically limited herein. Illustratively, the first humidity threshold is 10% and the second humidity threshold is 20%. Correspondingly, the preset humidity range is greater than or equal to 10% and less than or equal to 20%. The target sampling airflow is obtained by performing humidity exchange between the humidity value of the original sampling airflow and the humidity value of the blowback airflow through the proton exchange membrane 1000. The above shows that the blowback airflow includes the target sampling airflow, and the target sampling airflow can be obtained by exchanging the humidity of the blowback airflow and the original sampling airflow, so that the humidity value of the target sampling airflow is within the preset humidity range. The proton exchange membrane 1000 has strong water permeability, and when the humidity values of the substances on the two sides of the proton exchange membrane 1000 are different, the proton exchange membrane 1000 can realize the humidity exchange between the substances. The proton exchange membrane 1000 works differently than a microporous membrane. The microporous membrane transfers water through a relatively slow diffusion process, and the proton exchange membrane 1000 transfers water through absorption of a hydration chemical reaction, that is, under a humidity difference between two sides of the proton exchange membrane 1000, a substance on one side of the proton exchange membrane 1000 absorbs water, and a substance on the other side of the proton exchange membrane 1000 releases water, that is, water is transferred from a side with a higher humidity value to a side with a lower humidity value, so that humidity exchange is realized. The substances on both sides of the proton exchange membrane 1000 can be understood as the substances that are separated by the proton exchange membrane 1000. The hydration chemistry described above is understood to be a first order kinetic reaction. The humidity exchange efficiency of the proton exchange membrane 1000 is generally related to the humidity difference between the substances on both sides of the proton exchange membrane 1000 and the operating temperature of the proton exchange membrane 1000, i.e. the higher the humidity difference between the substances on both sides of the proton exchange membrane 1000 is, the higher the operating temperature of the proton exchange membrane 1000 is, the higher the humidity exchange efficiency of the proton exchange membrane 1000 is, and conversely, the lower the humidity exchange efficiency of the proton exchange membrane 1000 is. The substances on both sides of the proton exchange membrane 1000, i.e. the substance separated from the proton exchange membrane 1000, in the embodiment of the present invention, may refer to the original sampling air flow and the back-blowing air flow. In the embodiment of the present invention, the humidity exchange efficiency of the proton exchange membrane 1000 is related to the humidity difference between the original sampling airflow and the blowback airflow and the working temperature of the proton exchange membrane 1000, and is also related to the flow rate of the blowback airflow, that is, the larger the humidity difference between the original sampling airflow and the blowback airflow is, the higher the working temperature of the proton exchange membrane 1000 is, the larger the flow rate of the blowback airflow is, the higher the humidity exchange efficiency of the proton exchange membrane 1000 is, and conversely, the lower the humidity exchange efficiency of the proton exchange membrane 1000 is. It can be appreciated that increasing the humidity exchange efficiency of the proton exchange membrane 1000 can be achieved by at least one of increasing the humidity difference between the original sample air flow and the blowback air flow, increasing the operating temperature of the proton exchange membrane 1000, and increasing the flow rate of the blowback air flow. Wherein increasing the difference in humidity between the original sampled airflow and the blowback airflow may be accomplished by adjusting the humidity value of the blowback airflow. The proton exchange membrane 1000 can be divided into a perfluorosulfonic acid proton exchange membrane, a partial fluorosulfonic acid proton exchange membrane, a non-fluorosulfonic acid proton exchange membrane, and other proton exchange membranes of novel materials, depending on the polymer materials used for the proton exchange membrane 1000. The type of the proton exchange membrane 1000 may be selected according to actual conditions, and is not particularly limited herein. Illustratively, the proton exchange membrane 1000 may be a perfluorosulfonic acid proton exchange membrane, for example. The perfluorosulfonic acid proton exchange membrane may be a Nafion membrane. The Nafion membrane is made from a copolymer of polytetrafluoroethylene and perfluoro-3, 6-diepoxy-4-methyl-7-decene-sulfuric acid.

The humidity conditioning module 11 is used to form the blowback air stream and to adjust the humidity level of the blowback air stream via the adjustable air valve 112, as will be understood: as can be seen from the above, the blowback gas stream may be formed by mixing the target sample gas stream and the humidified gas stream, i.e., the blowback gas stream may include the target sample gas stream and the humidified gas stream. The humidified gas flow may be a gas flow formed after passing through the humidifier 111, that is, the humidified gas flow is obtained after passing through the humidifier 111. The humidifier 111 may be an apparatus that changes moisture into small molecules to increase the humidity of air using various methods such as ultrasonic waves and heating. The humidity conditioning module 11 may post-mix the flow of blowback gas and the flow of humidified gas through the different adjustable gas valves 112 to form a flow of blowback gas. The number of the adjustable air valves 112 may be set according to actual conditions, and is not particularly limited herein. Illustratively, if the number of adjustable air valves 112 is two, the humidity adjustment module 11 may mix the flow of blowback air through one of the adjustable air valves 112 with the flow of humidified air through the other adjustable air valve 112 to form a flow of blowback air. Meanwhile, the humidity value of the blowback gas flow can be adjusted by the adjustable gas valve 112, and the adjustable gas valve 112, i.e., a gas flow adjusting valve, which is an automated basic element for controlling the flow, direction, speed and other parameters of the gas flow, belongs to an actuator. In embodiments of the present invention, the adjustable air valve 112 may be used to control the flow of the target sample gas stream and the humidified gas stream to achieve control of the flow of the blowback gas stream. The variable gas valve 112 may be an electric gas flow regulating valve. Based on the above, the humidity adjustment module 11 adjusts the humidity value of the blowback air flow through the adjustable air valve 112, as follows: the blowback air flow is formed by mixing the target sampling air flow and the humidifying air flow which pass through different adjustable air valves 112, namely the target sampling air flow and the humidifying air flow are respectively mixed after passing through different adjustable air valves 112 to form blowback air flow, and the humidity value of the target sampling air flow and the humidity value of the humidifying air flow are possibly equal or unequal, so that the humidity value of the blowback air flow can be adjusted by adjusting the proportion of the target sampling air flow and the humidifying air flow in the blowback air flow. The proportion of the target sampling gas flow and the humidified gas flow in the blowback gas flow can be realized by adjusting the opening degree of the adjustable gas valve 112 corresponding to the target sampling gas flow to adjust the flow rate of the target sampling gas flow and adjusting the opening degree of the adjustable gas valve 112 corresponding to the humidified gas flow to adjust the flow rate of the humidified gas flow, that is, by adjusting the flow rate of the target sampling gas flow and the flow rate of the humidified gas flow forming the blowback gas flow, the proportion of the target sampling gas flow and the humidified gas flow in the blowback gas flow is adjusted, and the humidity value of the blowback gas flow is adjusted.

The adjustment of the opening degree of the adjustable air valve 112 is realized by the control module 13, specifically: the control module 13 may be configured to control the first temperature and humidity sensor 110 to collect a humidity value of the target sampling airflow, receive the humidity value of the target sampling airflow collected by the first temperature and humidity sensor 110, and adjust the opening of the adjustable air valve 112 according to the humidity value of the target sampling airflow so that the humidity value of the target sampling airflow is within a preset humidity range. It is understood that the first temperature and humidity sensor 110 may be used to collect a humidity value of the target sampled airflow. Accordingly, the first temperature/humidity sensor 110 may be disposed at a position where the target sampling airflow flows out of the humidity exchanging module 10, and the position where the target sampling airflow flows out of the humidity exchanging module 10 may be understood as an air outlet of the target sampling airflow. That is, the first temperature/humidity sensor 110 may be disposed at an air outlet of the target sampling airflow of the humidity exchanging module 10. It should be noted that the control module 13 may also collect the humidity value of the target sampling airflow by controlling the first humidity sensor. Correspondingly, the humidity adjustment module 11 may further include a first humidity sensor.

The air pump 12 is used to create a negative pressure sample and provide an air outlet for the target sample air stream and the blowback air stream, as can be understood as follows: the air pump 12 is a device for removing air from an enclosed space or adding air from an enclosed space, wherein removing air from an enclosed space is understood to mean extracting air from an enclosed space, and when the air pump 12 is used to extract air from an enclosed space, the air pump 12 may be referred to as a micro-pump or micro-vacuum pump having an inlet and an outlet, each of which may be one inlet and one outlet, and may continue to create a vacuum or negative pressure at the inlet and a slight positive pressure at the outlet. The specific working principle is as follows: the gas enters from the gas inlet, and the gas outlet is discharged, and the direct current motor of the micro vacuum pump provides power for extracting the gas. The original sampling airflow, the target sampling airflow and the blowback airflow according to the embodiment of the present invention can be realized by one air pump 12, because the blowback airflow is formed by blowing back the target sampling airflow. It will be appreciated that the original air pump 12 may provide negative pressure sampling to the air path through which the original sample air stream, the target sample air stream, and the blowback air stream flow. Furthermore, the air pump 12 may also provide an air outlet for the target sample air flow and the blowback air flow, i.e., the target sample air flow and the blowback air flow may be discharged through the air outlet of the air pump 12. The operation state of the air pump 12 can be controlled by the control module 13, wherein the operation state of the air pump 12 can include the start of the air pump 12 and the stop of the air pump 12, that is, the operation state of the air pump 12 can include the start and stop of the air pump 12.

It should be noted that, by using the proton exchange membrane, the humidity value of the target sampling air flow is maintained within the preset humidity range, that is, the humidity of the target sampling air flow is controlled to be constant.

It should be noted that, because only one air pump is needed, the humidity control device for air quality monitoring can be made smaller in size and lower in power consumption.

It should be noted that, since the blowback gas flow includes the target sampling gas flow, the target sampling gas flow can control the flow of the dry gas flow to the humidity exchange module, where the dry gas flow is referred to as compared to the humidified gas flow. In addition, because the blowback air flow comprises the humidifying air flow, the humidity control device for air quality monitoring provided by the embodiment of the invention has a humidifying function, so that the humidity control device can maintain the humidity value of the target sampling air flow within a preset humidity range in an extremely dry environment.

According to the technical scheme, the humidity control device comprises a humidity exchange module, a humidity adjusting module, an air pump and a control module and is used for monitoring the air quality, the humidity exchange module comprises a humidity exchange pipeline, the humidity exchange pipeline comprises a proton exchange membrane, the humidity adjusting module comprises a first temperature and humidity sensor, a humidifier and an adjustable air valve, the humidity exchange module is used for realizing the humidity exchange of an original sampling air flow and a blowback air flow through the proton exchange membrane to obtain a target sampling air flow, the target sampling air flow is a sampling air flow with the humidity value within a preset humidity range, the blowback air flow is formed by mixing the target sampling air flow and the humidifying air flow formed by the humidifier, the humidity adjusting module is used for forming the blowback air flow and adjusting the humidity value of the blowback air flow through the adjustable air valve, the air pump is used for forming negative pressure sampling and providing an air outlet for the target sampling air, the control module is used for controlling the humidity value of the target sampling air flow collected by the first temperature and humidity sensor, adjusting the opening degree of the adjustable air valve according to the humidity value of the target sampling air flow so as to enable the humidity value of the target sampling air flow to be within a preset humidity range, and controlling the working state of the air pump.

Optionally, as shown in fig. 2, on the basis of the above technical solution, the humidity control device 1 for monitoring air quality may further specifically include a temperature control module 14, and the temperature control module 14 may specifically include an original sampling airflow temperature control unit 140 and a second temperature and humidity sensor 141. The temperature control module 14 may be connected to the humidity exchange module 10 (not shown in fig. 2) and the control module 13, respectively.

The control module 13 may further be configured to control the second temperature and humidity sensor 141 to collect a temperature value of the original sampled airflow, and adjust a heating amplitude of the original sampled airflow temperature control unit 140 according to the temperature value of the original sampled airflow, so that the temperature value of the original sampled airflow is within a preset temperature range.

In an embodiment of the present invention, as shown in fig. 2, a schematic structural diagram of another humidity control device for air quality monitoring is provided. In order to maintain the temperature value of the original sampled airflow within the preset temperature range, and avoid the occurrence of condensed water in the original sampled airflow entering the humidity exchanging module 10, which reduces the humidity exchanging efficiency of the proton exchanging membrane 1000, the humidity control apparatus 1 for air quality monitoring may further include a temperature control module 14. The temperature control module 14 may specifically include a raw sampling airflow temperature control unit 140 and a second temperature and humidity sensor 141. The raw sample gas stream temperature control unit 140 may be a first pulse width modulation unit. The temperature control module 14 may be connected to the humidity exchanging module 10 and the control module 13, specifically, an output end of the control module 13 may be connected to a control end of the original sampling airflow temperature control unit 140 and a control end of the second temperature and humidity sensor 141, respectively, and the temperature control module 14 may be connected to the humidity exchanging module 10 through an air path.

The second temperature and humidity sensor 141 may be configured to collect a temperature value of the original sampled airflow under the control of the control module 13, and send the collected temperature value of the original sampled airflow to the control module 13, and the control module 13 may adjust a heating range of the original sampled airflow temperature control unit 140 according to the temperature value of the original sampled airflow, so that the temperature value of the original sampled airflow is within a preset temperature range. The preset temperature range is understood to be a temperature range formed by a first temperature threshold and a second temperature threshold, and the first temperature threshold may be smaller than the second temperature threshold. The preset temperature range may be set according to an actual situation, and is not specifically limited herein, that is, the first temperature threshold and the second temperature threshold may be set according to an actual situation, and are not specifically limited herein. Illustratively, the first temperature threshold is 10 ℃ and the second temperature threshold is 40 ℃. Correspondingly, the preset temperature range is more than or equal to 10 ℃ and less than or equal to 40 ℃. It should be noted that the control module 13 may further collect a temperature value of the original sampled airflow by controlling a temperature sensor, and correspondingly, the temperature control module 14 may further include a temperature sensor.

It should be further noted that, by controlling the temperature value of the original sampling airflow to maintain the temperature value of the original sampling airflow within the preset temperature range, condensed water in the original sampling airflow entering the humidity exchange module 10 can be avoided, so as to improve the reaction working point of the humidity exchange of the proton exchange membrane 1000, and further improve the humidity exchange efficiency of the proton exchange membrane 1000. On the basis, the humidity value adjusting range of the target sampling air flow can be expanded, and the humidity value adjusting precision of the target sampling air flow is improved.

Optionally, as shown in fig. 2, based on the above technical solution, the humidity adjustment module 11 (not shown in fig. 2) may further include a blowback air temperature control unit 113, and the blowback air temperature control unit 113 may be connected to the variable air valve 112 (not shown in fig. 2), the humidity exchange module 10 (not shown in fig. 2), and the control module 13, respectively.

The control module 13 may be configured to control the first temperature and humidity sensor 110 to collect a humidity value of the target sampling airflow, and may adjust the opening of the adjustable air valve 112 according to the humidity value of the target sampling airflow, and/or adjust the heating amplitude of the blowback airflow temperature control unit 113, so that the humidity value of the target sampling airflow is within a preset humidity range, and control the working state of the air pump 12.

In the embodiment of the present invention, in order to further improve the humidity exchange efficiency of the proton exchange membrane 1000, further expand the humidity value adjustment range of the target sampling air flow and improve the humidity value adjustment precision of the target sampling air flow, the humidity adjustment module 11 may further specifically include a blowback air flow temperature control end unit 113. The blowback air flow temperature control unit 113 may be connected to the adjustable air valve 112, the humidity exchanging module 10, and the control module 13, respectively, wherein the blowback air flow temperature control unit 113 may be connected to the control module 13, and specifically, a control end of the blowback air flow temperature control unit 113 may be connected to an output end of the control module 13.

The control module 13 may adjust the heating amplitude of the blowback air temperature control unit 113 according to the received humidity value of the target sampling air flow collected by the first temperature and humidity sensor 110, so as to change the humidity exchange condition of the proton exchange membrane 1000, and further improve the humidity exchange efficiency of the proton exchange membrane 1000, so as to adjust the humidity value of the target sampling air flow to a preset humidity range. The control module 13 may adjust the heating amplitude of the blowback air stream temperature control unit according to the humidity value of the target sampled air stream, as may be understood as follows: the preset humidity range may be a humidity range formed by a first humidity threshold and a second humidity threshold, the first humidity threshold being less than the second humidity threshold. If the control module 13 determines that the humidity value of the target sampling airflow is greater than or equal to the second humidity threshold, it may indicate that the humidity value of the target sampling airflow is too high, and the control module 13 may decrease the heating amplitude of the feedback airflow temperature control unit 113. If the control module 13 determines that the humidity value of the target sampled airflow is less than or equal to the first humidity threshold, it may indicate that the humidity value of the target sampled airflow is too low, and the control module 13 may increase the heating amplitude of the blowback airflow temperature control unit 113. The blowback air flow may enter the humidity exchanging module 10 through the blowback air flow temperature control unit 113, so that the humidity value of the blowback air flow is changed, and the humidity exchanging condition of the proton exchanging membrane 1000 may be changed. On the basis, the humidity exchange efficiency of the proton exchange membrane 1000 is improved, and finally the humidity value of the target sampling air flow can be adjusted.

The control module 13 may be configured to control the first temperature and humidity sensor 110 to collect a humidity value of the target sampling airflow, receive the humidity value of the target sampling airflow collected by the first temperature and humidity sensor 110, and adjust the opening of the adjustable air valve 112 according to the humidity value of the target sampling airflow so that the humidity value of the target sampling airflow is within a preset humidity range, which may be understood as follows: the control module 13 may be configured to control the first temperature and humidity sensor 110 to acquire a humidity value of the target sampling airflow, receive the humidity value of the target sampling airflow acquired by the first temperature and humidity sensor 110, and adjust the opening of the adjustable air valve 112 according to the humidity value of the target sampling airflow, and/or adjust the heating amplitude of the blowback airflow temperature control unit 113, so that the humidity value of the target sampling airflow is within a preset humidity range. That is, the control module 13 may adjust the opening of the adjustable air valve 112 according to the humidity value of the target sample air flow, so that the humidity value of the target sample air flow is within the preset humidity range. Alternatively, the control module 13 may adjust the heating amplitude of the blowback air stream temperature control unit 113 according to the humidity value of the target sample air stream so that the humidity value of the target sample air stream is within the preset humidity range. Alternatively, the control module 13 may adjust the opening of the adjustable air valve 112 and adjust the heating amplitude of the blowback air flow temperature control unit 113 according to the humidity value of the target sample air flow, so that the humidity value of the target sample air flow is within the preset humidity range.

It should be noted that, when the humidity value of the target sampling air flow is not within the preset humidity range, and the humidity value of the target sampling air flow is adjusted in two ways, so that the humidity value of the target sampling air flow is adjusted to be within the preset humidity range, the execution sequence of the two ways may be set according to the actual situation, and is not limited specifically herein. That is, if the control module 13 can adjust the opening degree of the adjustable air valve 112 according to the humidity value of the target sampling air flow, and adjust the opening degree of the blowback air flow temperature control unit 113, so that the humidity value of the target sampling air flow is within the preset humidity range, the opening degree of the adjustable air valve 112 is adjusted, and the sequence of adjusting the blowback air flow temperature control unit 113 can be set according to the actual situation, which is not specifically limited herein.

For example, the control module 13 may adjust the opening of the variable air valve 112 according to the humidity value of the target sample air stream, and, the heating amplitude of the blowback air stream temperature control unit 113 is adjusted so that the humidity value of the target sample air stream is within the preset humidity range, the order of adjusting the opening degree of the variable valve 112 and the heating amplitude of the blowback gas flow temperature control unit 113 is not particularly limited, that is, the opening of the adjustable air valve 112 is first adjusted, during the adjustment process, it is determined whether the humidity value of the target sampling air flow is within the preset humidity range, if the humidity value of the target sampled airflow is not within the preset humidity range, it is determined whether the opening of the variable valve 112 reaches a limit opening, if the limit opening degree has been reached, the heating amplitude of the blowback air stream temperature control unit 113 is adjusted until the humidity value of the target sampled air stream is adjusted to be within the preset humidity range. If the limit opening degree is not reached, the opening degree of the adjustable air valve 112 is continuously adjusted until the humidity value of the target sampling air flow is adjusted to be within the preset humidity range. The heating amplitude of the blowback air flow temperature control unit 113 may also be adjusted first, during the adjustment process, it is determined whether the humidity value of the target sampled air flow is within the preset humidity range, if the humidity value of the target sampled air flow is not within the preset humidity range, it is determined whether the heating amplitude of the blowback air flow temperature control unit 113 reaches the limit amplitude, and if the humidity value of the target sampled air flow has reached the limit amplitude, the opening degree of the adjustable air valve 112 is adjusted until the humidity value of the target sampled air flow is adjusted to be within the preset humidity range. If the limit amplitude is not reached, the opening degree of the blowback air flow temperature control unit 113 is continuously adjusted until the humidity value of the target sampling air flow is adjusted to be within the preset humidity range. As indicated above, if the humidity value of the target sampled airflow is not adjusted within the preset humidity range after the adjustable air valve 112 that is adjusted first reaches the limit opening, the heating amplitude of the blowback airflow temperature control unit 113 is adjusted until the humidity value of the target sampled airflow is adjusted within the preset humidity range. If the humidity value of the target sampled airflow is not adjusted to be within the preset humidity range after the previously adjusted blowback airflow temperature control unit 113 reaches the limit amplitude, the opening degree of the adjustable air valve 112 is adjusted until the humidity value of the target sampled airflow is adjusted to be within the preset humidity range. It can be understood that, in the above adjusting process, if the control module determines that the humidity value of the target sampling air flow is within the preset humidity range, the humidity value adjustment of the target sampling air flow is completed, and the subsequent adjusting operation is not required to be executed.

Optionally, as shown in fig. 2, based on the above technical solution, the adjustable air valve 112 (not shown in fig. 2) may specifically include a first adjustable air valve 1120, a second adjustable air valve 1121, and a third adjustable air valve 1122. The first adjustable air valve 1120 is connected to a second adjustable air valve 1121 and a third adjustable air valve 1122, respectively, the second adjustable air valve 1121 is connected to the humidifier 111 and the temperature control unit 113 for the blowback air stream, respectively, and the third adjustable air valve 1122 is connected to the air pump 12.

The blowback gas stream is formed by mixing a first target sample gas stream, which may be the target sample gas stream of the target sample gas stream passing through the first variable air valve 1120, and the humidified gas stream passing through the humidifier 111 and the second variable air valve 1121.

The second target branched sampled airflow may be the target sampled airflow of the target sampled airflow passing through the third adjustable air valve 1122, and the second target branched sampled airflow may be discharged through the air outlet of the air pump 12.

The control module 13 may be configured to control the first temperature and humidity sensor 110 to collect a humidity value of the target sampling airflow, and may adjust the opening of the first adjustable air valve 1120 and the opening of the third adjustable air valve 1122, adjust the opening of the second adjustable air valve 1121, and adjust at least one of the heating amplitudes of the blowback airflow temperature control unit 113 according to the humidity value of the target sampling airflow, so as to make the humidity value of the target sampling airflow within a preset humidity range, and control the working state of the air pump 12.

In an embodiment of the present invention, to further expand the humidity value adjustment range of the target sampled airflow and improve the humidity value adjustment precision of the target sampled airflow, the adjustable air valve 112 may specifically include a first adjustable air valve 1120, a second adjustable air valve 1121, and a third adjustable air valve 1122. The first adjustable air valve 1120 is connected to the second adjustable air valve 1121 and the third adjustable air valve 1122, and specifically, the first adjustable air valve 1120 is connected to the second adjustable air valve 1121 and the third adjustable air valve 1122 through air paths. The second adjustable air valve 1121 may be connected to the humidifier 111 and the temperature control unit 113, respectively, that is, the second adjustable air valve 1121 may be disposed between the humidifier 111 and the temperature control unit 113, and the humidifier 111, the second adjustable air valve 1121, and the temperature control unit 113 may be connected by air paths. Third adjustable air valve 1122 may be connected to first adjustable air valve 1120 and air pump 12, respectively, and specifically third adjustable air valve 1122 may be connected to first adjustable air valve 1120 and air pump 12, respectively, via air paths.

The target sampled airflow may be split into a first target branch sampled airflow and a second target branch sampled airflow, where the first target branch sampled airflow may be the target sampled airflow of the target sampled airflow through first adjustable air valve 1120 and the second target branch sampled airflow may be the target sampled airflow of the target sampled airflow through third adjustable air valve 1122. The humidified gas stream may pass through the second adjustable gas valve 1121 and the first target branch sampled gas stream may be mixed with the humidified gas stream passing through the second adjustable gas valve 1121 to form a back blowing gas stream. The second target branched sample air stream may be discharged through the air outlet of the air pump 12. It will be appreciated that, since the target sample gas stream may be split into the first target branch sample gas stream and the second target branch sample gas stream, the flow rate of the target sample gas stream will be equal to the sum of the flow rate of the first target branch sample gas stream and the flow rate of the second target branch sample gas stream. It is appreciated that the control module 13 may adjust the ratio of the first target branch sample airflow to the blowback airflow by adjusting the opening of the first adjustable air valve 1120 and adjusting the opening of the third adjustable air valve 1122. The control module 12 can adjust the proportion of the humidified airflow in the blowback airflow by adjusting the opening of the second adjustable air valve 1121. Based on the above, under the condition that the humidity value of the first target branch sampling air flow is different from the humidity value of the humidified air flow, the humidity value of the blowback air flow can be adjusted by adjusting the proportion of the first target branch sampling air flow in the blowback air flow and the proportion of the humidified air flow in the blowback air flow, and thus the humidity exchange efficiency of the proton exchange membrane 1000 can be changed. On the basis, the humidity value of the target sampling airflow is maintained within the preset humidity range.

Based on the above, the control module 13 may be configured to control the first temperature and humidity sensor 110 to collect the humidity value of the target sampling airflow, receive the humidity value of the target sampling airflow collected by the first temperature and humidity sensor 110, and adjust the opening of the adjustable air valve 112 according to the humidity value of the target sampling airflow so that the humidity value of the target sampling airflow is within the preset humidity range, which may be understood as follows: the control module 13 may be configured to control the first temperature and humidity sensor 110 to acquire a humidity value of the target sampling airflow, receive the humidity value of the target sampling airflow acquired by the first temperature and humidity sensor 110, adjust the opening of the first adjustable air valve 1120 and the opening of the third adjustable air valve 1122 according to the humidity value of the target sampling airflow, adjust the opening of the second adjustable air valve 1121, and adjust at least one of the heating amplitudes of the blowback airflow temperature control unit 113, so that the humidity value of the target sampling airflow is within a preset humidity range. That is, the control module 13 may adjust the opening of the first adjustable air valve 1120 and the opening of the third adjustable air valve 1122 according to the humidity value of the target sample air flow, so that the humidity value of the target sample air flow is within the preset humidity range. Alternatively, the control module 13 may adjust the opening of the second adjustable air valve 1121 according to the humidity value of the target sampled air flow, so that the humidity value of the target sampled air flow is within the preset humidity range. Alternatively, the control module 13 may adjust the heating amplitude of the blowback air stream temperature control unit 113 according to the humidity value of the target sample air stream so that the humidity value of the target sample air stream is within the preset humidity range. Alternatively, the control module 13 may adjust the opening degree of the first adjustable air valve 1120 and the opening degree of the third adjustable air valve 1122 according to the humidity value of the target sampled air flow, and adjust the opening degree of the second adjustable air valve 1121, so that the humidity value of the target sampled air flow is within the preset humidity range. Alternatively, control module 13 may adjust the opening of first adjustable air valve 1120 and the opening of third adjustable air valve 1122 according to the humidity value of the target sampled air flow, and adjust the heating amplitude of blowback air flow temperature control unit 113 to make the humidity value of the target sampled air flow within the preset humidity range. Alternatively, the control module 13 may adjust the opening of the second adjustable air valve 1121 according to the humidity value of the target sampling air flow, and adjust the heating amplitude of the blowback air flow temperature control unit 113. Alternatively, the control module 13 may adjust the opening degree of the first adjustable air valve 1120 and the opening degree of the third adjustable air valve 1122, adjust the opening degree of the second adjustable air valve 1121, and adjust the heating amplitude of the blowback air temperature control unit 113 according to the humidity value of the target sampled air flow, so as to make the humidity value of the target sampled air flow within the preset humidity range.

It should be noted that, when the humidity value of the target sampling air flow is not within the preset humidity range, and the humidity value of the target sampling air flow is adjusted in at least two ways, so that the humidity value of the target sampling air flow is adjusted within the preset humidity range, the execution sequence of the at least two ways may be set according to the actual situation, which is not specifically limited herein. That is, if the control module 13 can adjust the opening degree of the first adjustable air valve 1120 and the opening degree of the third adjustable air valve 1122 according to the humidity value of the target sampled air flow, and adjust the opening degree of the second adjustable air valve 1121 so that the humidity value of the target sampled air flow is within the preset humidity range, the opening degree of the first adjustable air valve 1120 and the opening degree of the third adjustable air valve 1122 are adjusted, and the sequence of adjusting the opening degrees of the second adjustable air valve 1121 may be set according to actual situations, which is not specifically limited herein. If the control module 13 can adjust the opening degree of the first adjustable air valve 1120 and the opening degree of the third adjustable air valve 1122 according to the humidity value of the target sampled air flow, and adjust the heating amplitude of the blowback air flow temperature control unit 113 so as to make the humidity value of the target sampled air flow within the preset humidity range, the opening degree of the first adjustable air valve 1120 and the opening degree of the third adjustable air valve 1122 are adjusted, and the sequence of adjusting the blowback air flow temperature control unit 113 can be set according to the actual situation, which is not specifically limited herein. If the control module 13 can adjust the opening degree of the first adjustable air valve 1120 and the opening degree of the third adjustable air valve 1122, adjust the opening degree of the second adjustable air valve 1121, and adjust the heating amplitude of the blowback air temperature control unit 113, so that the humidity value of the target sampled air flow is within the preset humidity range, the opening degree of the first adjustable air valve 1120 and the opening degree of the third adjustable air valve 1122 are adjusted, the opening degree of the second adjustable air valve 1121 is adjusted, and the sequence of adjusting the heating amplitude of the blowback air temperature control unit 113 can be set according to the actual situation, which is not specifically limited herein.

For example, if the control module 13 can adjust the opening degree of the first adjustable air valve 1120 and adjust the opening degree of the third adjustable air valve 1122 according to the humidity value of the target sampled air flow, and adjust the opening degree of the second adjustable air valve 1121 so that the humidity value of the target sampled air flow is within the preset humidity range, the opening degree of the first adjustable air valve 1120 and the opening degree of the third adjustable air valve 1122 are adjusted, and the sequence of adjusting the opening degree of the second adjustable air valve 1121 is not specifically limited, that is, the opening degree of the first adjustable air valve 1120 and the opening degree of the third adjustable air valve 1122 are adjusted first, during the adjustment, it is determined whether the humidity value of the target sampled air flow is within the preset humidity range, if the humidity value of the target sampled air flow is not within the preset humidity range, it is determined whether the opening degree of the first adjustable air valve 1120 and the opening degree of the third adjustable air valve 1122 reach the limit opening degree, and if the limit opening degree is reached, the opening degree of the second adjustable air valve 1121 is adjusted until the humidity value of the target sampling air flow is adjusted to be within the preset humidity range. If the limit opening is not reached, the opening of first adjustable air valve 1120 and the opening of third adjustable air valve 1122 are continuously adjusted until the humidity value of the target sampled airflow is adjusted to be within the preset humidity range. The opening degree of the second adjustable air valve 1121 may also be adjusted first, during the adjustment process, it is determined whether the humidity value of the target sampled air flow is within the preset humidity range, if the humidity value of the target sampled air flow is not within the preset humidity range, it is determined whether the opening degree of the second adjustable air valve 1122 reaches the limit opening degree, and if the limit opening degree is reached, the opening degree of the first adjustable air valve 1120 and the opening degree of the third adjustable air valve 1122 are adjusted until the humidity value of the target sampled air flow is adjusted to be within the preset humidity range. If the limit opening is not reached, the opening of the second adjustable air valve 1121 is continuously adjusted until the humidity value of the target sampling air flow is adjusted to be within the preset humidity range. As indicated above, if the humidity value of the target sampled airflow is not adjusted to be within the preset humidity range after the first adjustable air valve 1120 and the third adjustable air valve 1122 that are adjusted first reach their respective limit opening degrees, the opening degree of the second adjustable air valve 1121 is adjusted until the humidity value of the target sampled airflow is adjusted to be within the preset humidity range. If the humidity value of the target sampled airflow is not adjusted within the preset humidity range after the previously adjusted second adjustable air valve 1121 reaches the limit opening, the opening of the first adjustable air valve 1120 and the opening of the third adjustable air valve 1122 are adjusted until the humidity value of the target sampled airflow is adjusted within the preset humidity range. It can be understood that, in the above adjusting process, if the control module determines that the humidity value of the target sampling air flow is within the preset humidity range, the humidity value adjustment of the target sampling air flow is completed, and the subsequent adjusting operation is not required to be executed.

It should be noted that, in a case that the flow rate of the target sampled airflow is constant, since the sum of the flow rate of the first target branch sampled airflow and the flow rate of the second target branch sampled airflow is equal to the flow rate of the target sampled airflow, it is necessary to adjust the opening degree of the first adjustable air valve 1120 and the opening degree of the third adjustable air valve 1122 at the same time, and the direction of adjusting the opening degree of the first adjustable air valve 1120 is opposite to the direction of adjusting the opening degree of the third adjustable air valve 1122, so as to ensure that the sum of the flow rate of the first target branch sampled airflow and the flow rate of the second target branch sampled airflow is equal to the flow rate of the target sampled airflow. The direction of adjusting the opening of first adjustable valve 1120 is opposite to the direction of adjusting the opening of third adjustable valve 1122 as will be understood: if the opening of first adjustable valve 1120 is decreased, the opening of third adjustable valve 1122 is increased. If the opening of first adjustable valve 1120 is adjusted larger, the opening of third adjustable valve 1122 will be adjusted smaller. It can be understood that, since the third adjustable air valve 1122 can split the target sampled airflow, the proportion of the target sampled airflow in the blowback airflow can be adjusted, and based on this, the humidity value adjustment range of the target sampled airflow can be further expanded and the humidity value adjustment accuracy of the target sampled airflow can be further improved by the third adjustable air valve 1122.

Optionally, as shown in fig. 2, on the basis of the above technical solution, the humidity exchanging module 10 may further specifically include a casing 101 and a third temperature and humidity sensor 102. The interior of the casing 101 may be provided with a humidity exchange conduit 100 (not shown in fig. 2), the interior surface of the casing 101 may be provided with a third temperature and humidity sensor 102, and the casing 101 may be provided with a raw sample gas flow inlet 1010, a target sample gas flow outlet 1011, a blowback gas flow inlet 1012, and a blowback gas flow outlet 1013. The blowback air stream outlet 1013 may be connected to an air pump 12.

The original sample air flow may enter the interior of the humidity exchange circuit 100 through the original sample air flow inlet 1010, and the blowback air flow may enter the area formed by the exterior of the humidity exchange circuit 100 and the inner surface of the casing 101 through the blowback air flow inlet 1012, the original sample air flow and the blowback air flow flowing in opposite directions.

The control module 13 may further be configured to control the third temperature and humidity sensor 102 to acquire a humidity value of the blowback air flow, adjust the opening of the adjustable air valve 112 according to the humidity value of the target sampling air flow and/or the humidity value of the blowback air flow, and control the working state of the air pump 12.

In the embodiment of the present invention, the humidity exchanging module 10 may further include a casing 101 and a third temperature and humidity sensor 102. The casing 101 may be provided with a humidity exchange pipe 100 inside, the inner surface of the casing 101 may be provided with a third temperature and humidity sensor 102, and the casing 101 may be provided with a raw sampling air flow inlet 1010, a target sampling air flow outlet 1011, a blowback air flow inlet 1012 and a blowback air flow outlet 1013.

The original sampling airflow can enter the inside of the humidity exchange pipeline 100 through the original sampling airflow inlet 1010, the blowback airflow can enter the area formed by the outside of the humidity exchange pipeline 100 and the inner surface of the casing 101 through the blowback airflow inlet 1012, and the blowback airflow can enter the air pump 12 through the blowback airflow outlet 1012 and then be discharged through the air outlet of the air pump 12. The flow direction of the original sampling airflow is opposite to that of the blowback airflow, namely the flow direction of the original sampling airflow can be from top to bottom, and the flow direction of the blowback airflow can be from bottom to top. As can be seen from the above description, since the humidity exchange pipeline 100 includes the proton exchange membrane 1000, the original sampling air flow and the blowback air flow are separated by the proton exchange membrane 1000. The humidity exchange between the original sampling airflow and the blowback airflow is realized through the proton exchange membrane 1000, and the target sampling airflow is obtained. It should be noted that the rest of the humidity exchange pipeline 100 except the supporting and sealing portion is the proton exchange membrane 1000. It is further noted that the interior of the humidity exchange circuit 100 is completely sealed from the exterior of the humidity exchange circuit 100. Based on this, no airflow is allowed to pass between the inside and the outside of the humidity exchange duct 100.

The third temperature and humidity sensor 102 may be configured to collect a humidity value of the blowback air flow under the control of the control module 13, and send the collected humidity value of the blowback air flow to the control module 13, and the control module 13 may adjust the opening of the adjustable air valve 112 according to the humidity value of the blowback air flow and/or the humidity value of the target sampling air flow, so that the humidity value of the target sampling air flow is within a preset humidity range. That is, the control module 13 may adjust the opening of the adjustable air valve 112 according to the humidity value of the blowback air flow, so that the humidity value of the target sampling air flow is within the preset humidity range. Alternatively, the control module 13 may adjust the opening of the adjustable air valve 112 according to the humidity value of the target sampling air flow, so that the humidity value of the target sampling air flow is within the preset humidity range. Alternatively, the control module 13 may adjust the opening of the adjustable air valve 112 according to the humidity value of the blowback air flow and the humidity value of the target sampling air flow, so that the humidity value of the target sampling air flow is within the preset humidity range. If the adjustable air valves 112 include a first adjustable air valve 1120, a second adjustable air valve 1121, and a third adjustable air valve 1122, the control module 13 may adjust the opening degree of the first adjustable air valve 1120 and the opening degree of the third adjustable air valve 1122, and/or adjust the opening degree of the second adjustable air valve 1121, according to the humidity value of the target sampled air flow, so that the humidity value of the target sampled air flow is within the preset humidity range. It should be noted that the control module 13 may further control the second humidity sensor to acquire a humidity value of the blowback air flow, and accordingly, the humidity exchanging module 10 may further specifically include the second humidity sensor.

It should be further noted that a second temperature and humidity sensor may be further disposed on the inner surface of the casing 101, and a control end of the second temperature and humidity sensor disposed on the inner surface of the casing 101 may be connected to the output end of the control module. The second temperature and humidity sensor disposed on the inner surface of the casing 101 may be configured to collect a temperature value of the blowback air flow under the control of the control module 13, and send the collected temperature value of the blowback air flow to the control module 13, so that the control module 13 may also adjust the heating amplitude of the blowback air flow temperature control unit 113 according to the temperature value of the blowback air flow.

Optionally, as shown in fig. 2, on the basis of the above technical solution, the humidity adjustment module 11 may further include a first filter 114. The first filter 114 may be connected to the humidifier 111.

The first filter 114 may be used to filter the airflow entering the humidifier 111.

In the embodiment of the present invention, in order to reduce the impurities, dirt, and the like carried by the airflow entering the humidity control device as much as possible and further protect the humidity exchanging module 10, the humidity adjusting module 11 may be further provided with a first filter 114. The first filter 114 may be connected to the humidifier 111, and specifically, the first filter 114 may be connected to the humidifier 111 through a gas line. The gas stream used to form the humidified gas stream may enter a first filter 114 prior to entering the humidifier 111, and the first filter 114 may be used to filter the gas stream entering the humidifier 111.

Optionally, on the basis of the above technical solution, the original sampling airflow temperature control unit 140 may specifically include a first pulse width modulation unit, and/or the blowback airflow temperature control unit 113 may specifically include a second pulse width modulation unit.

In an embodiment of the present invention, the original sampled airflow temperature control unit 140 may include a first pulse width modulation unit, i.e., the original sampled airflow temperature control unit 140 may be a first pulse width modulation unit, and/or the blowback airflow temperature control unit 113 may include a second pulse width modulation unit, i.e., the blowback airflow temperature control unit 113 may be a second pulse width modulation unit. Pulse width modulation is a method of digitally encoding the level of an analog signal, the duty cycle of a square wave being modulated to encode the level of a particular analog signal through the use of a high resolution counter, the pulse width modulated signal still being digital, since at any given time, a full amplitude dc supply is either completely present (i.e., ON) or completely absent (i.e., OFF).

Based on the above, the control module 13 may adjust the heating amplitude of the original sampled airflow temperature control unit 140 according to the temperature value of the original sampled airflow, so that the temperature value of the original sampled airflow is within the preset temperature range, which can be understood as follows: the control module 13 can adjust the heating amplitude by adjusting the pulse width of the first pulse width modulation unit according to the temperature value of the original sampled airflow, so that the temperature value of the original sampled airflow is within a preset temperature range.

Based on the above, the control unit 13 may adjust the heating amplitude of the blowback air flow temperature control unit 113 according to the humidity value of the target sampling air flow, so that the humidity value of the target sampling air flow is within the preset humidity range, which can be understood as follows: the control module 13 may adjust the heating amplitude by adjusting the pulse width of the second pulse width modulation unit according to the humidity value of the target sampling air flow, so that the humidity value of the target sampling air flow is within the preset humidity range.

In order to better understand the humidity control device for air quality monitoring provided by the embodiment of the present invention, the operation process thereof will be described with reference to fig. 2, specifically: as shown in fig. 2, the original sampling airflow may sequentially pass through the original sampling airflow temperature control unit 140 of the temperature control module 14 and the second temperature and humidity sensor 141 to enter the humidity exchange pipeline 100 of the humidity exchange module 10, and the blowback airflow that enters the area formed by the inner surface of the casing 101 of the humidity exchange module 10 and the humidity exchange pipeline 100 through the blowback airflow inlet 1012 formed on the casing 101 of the humidity exchange module 10 realizes humidity exchange under the action of the proton exchange membrane 1000 to obtain a target sampling airflow, and after passing through the target sampling airflow outlet 1011 formed on the casing 101, the target sampling airflow is divided into a first target branched sampling airflow and a second target branched sampling airflow through the first temperature and humidity sensor 110 of the humidity adjustment module 11, wherein the first target branched sampling airflow passes through the first adjustable air valve 1120, and the second target branched sampling airflow passes through the third adjustable air valve 1122, the second target branched sampled airflow 1122 may be discharged through the air outlet of the air pump 12. After passing through the first filter 114 and the humidifier 111 of the humidity adjustment module 11 in sequence, a humidified air flow is obtained, and after passing through the second adjustable air valve 1121, the humidified air flow is mixed with the first target branch sampling air flow to obtain a blowback air flow, and after passing through the blowback air flow temperature control unit 113, the blowback air flow enters the humidity exchange module 10 through the blowback air flow inlet 1012. The blowback air flow can also enter the air pump 12 through a blowback air flow outlet 1013 formed on the casing 101 of the humidity exchange module 10, and can be discharged from the air outlet of the air pump 12. In the above process, the air pump 12 may be used to create a negative pressure sample and provide vents for the target sample and blowback air streams. The control module 13 may be configured to control the second temperature and humidity sensor 141 to collect a temperature value of the original sampled airflow, receive a temperature value of the original sampled airflow collected by the second temperature and humidity sensor 141, and control the first temperature and humidity sensor 110 to collect a humidity value of the target sampled airflow. The control module 13 may adjust the heating amplitude of the original sampled airflow temperature control unit 140 according to the temperature value of the original sampled airflow, so that the temperature value of the original sampled airflow is within a preset temperature range. After determining that the temperature value of the original sampled airflow is within the preset temperature range, the control module 13 may adjust at least one of the opening degree of the first adjustable air valve 1120, the opening degree of the third adjustable air valve 1122, the opening degree of the second adjustable air valve 1121, and the heating amplitude of the blowback airflow temperature control unit 113 according to the humidity value of the target sampled airflow, so as to make the humidity value of the target sampled airflow within the preset humidity range. The control module 13 may be used to control the operating state of the air pump 12.

It should be noted that, when the humidity control device for air quality monitoring according to the embodiment of the present invention is used for air quality monitoring, corresponding air quality monitoring sensors may be disposed between the first temperature and humidity sensor 110 and the first adjustable air valve 1120 and the third adjustable air valve 1122, that is, a target sampling air flow enters the air quality monitoring sensors after passing through the first temperature and humidity sensor 110 of the humidity adjusting module 11, and the target sampling air flow flowing out from the air quality monitoring sensors is divided into a first target branch sampling air flow and a second target branch sampling air flow, where the first target branch sampling air flow passes through the first adjustable air valve 1120, and the second target branch sampling air flow passes through the third adjustable air valve 1122.

Fig. 3 is a schematic structural diagram of an air quality monitor according to an embodiment of the present invention, which is applicable to a case where a humidity value of a sampled airflow is maintained within a preset humidity range. As shown in fig. 3, the air quality monitor may specifically include a humidity control device 1 (not shown in fig. 3) for air quality monitoring according to an embodiment of the present invention, and may specifically further include a particulate matter sensor 2, the structure and function of which are described below.

The moisture conditioning module 11 (not shown in fig. 3) may further include a flow controller 115 and a second filter 116. The second filter 116 may be connected to the flow controller 115 and the particulate matter sensor 2, respectively, and the flow controller 115 may also be connected to the control module 13.

The particulate matter sensor 2 may be used to collect the concentration of particulate matter in the target sampled airflow.

The second filter 116 may be used to filter the target sample gas stream.

The control module 13 may also be used to control the flow controller 115 to make the flow of the target sample gas flow through the particulate matter sensor 2 constant.

In an embodiment of the present invention, the air quality monitor may include a humidity control device 1 for air quality monitoring according to an embodiment of the present invention, and may further include a particulate matter sensor 2. The humidity adjustment module 11 may further include a flow controller 115 and a second filter 116. The second filter 116 may be connected to the flow controller 115 and the particle sensor 2, respectively, and the flow controller 115 may be further connected to the control module 13, and in particular, the second filter 116 may be disposed between the particle sensor 2 and the flow controller 115, and a control end of the flow controller 115 may be connected to an output end of the control module 13.

The particulate matter sensor 2 may be used to collect the concentration of particulate matter in the target sampled airflow. The particle sensor 2 can be a vibrating balance sensor or other particle sensor. The second filter 116 may be used to filter the target sample gas flow such that the target sample gas flow entering the flow controller 115 is a filtered target sample gas flow. The control module 13 may also be used to control the flow controller 115 such that the flow of the target sample gas stream through the particulate matter sensor 2 is constant.

Based on the above, the original sampling airflow may sequentially enter the humidity exchange pipeline 100 of the humidity exchange module 10 through the original sampling airflow temperature control unit 140 and the second temperature and humidity sensor 141 of the temperature control module 14, and then, the humidity exchange may be implemented with the blowback airflow entering the area formed by the inner surface of the casing 101 of the humidity exchange module 10 and the humidity exchange pipeline 100 (not shown in fig. 3) through the blowback airflow inlet 1012 formed on the casing 101 of the humidity exchange module 10 under the action of the proton exchange membrane 1000, so as to obtain the target sampling airflow, the target sampling airflow passes through the target sampling airflow outlet 1011 formed on the casing 101, then enters the particulate matter sensor 2 through the first temperature and humidity sensor 110 of the humidity adjustment module 11, and the target sampling airflow flowing out from the particulate matter sensor 2 sequentially passes through the second filter 116 and the flow controller 115 of the humidity adjustment module 11, and then is divided into the first target branched sampling airflow and the second target branched sampling airflow Wherein the first target branched sampled airflow passes through the first adjustable air valve 1120, the second target branched sampled airflow passes through the third adjustable air valve 1122, and the second target branched sampled airflow 1122 is discharged through the outlet of the air pump 12. After passing through the first filter 114 and the humidifier 111 of the humidity adjustment module 11 in sequence, a humidified air flow is obtained, and after passing through the second adjustable air valve 1121, the humidified air flow is mixed with the first target branch sampling air flow to obtain a blowback air flow, and after passing through the blowback air flow temperature control unit 113, the blowback air flow enters the humidity exchange module 10 through the blowback air flow inlet 1012. The blowback air flow can also enter the air pump 12 through a blowback air flow outlet 1013 formed on the casing 101 of the humidity exchange module 10, and can be discharged from the air outlet of the air pump 12. In the above process, the air pump 12 may be used to create a negative pressure sample and provide vents for the target sample and blowback air streams. The control module 13 may be configured to control the second temperature and humidity sensor 141 to collect a temperature value of the original sampled airflow, receive a temperature value of the original sampled airflow collected by the second temperature and humidity sensor 141, and control the first temperature and humidity sensor 110 to collect a humidity value of the target sampled airflow. The control module 13 may adjust the heating amplitude of the original sampled airflow temperature control unit 140 according to the temperature value of the original sampled airflow, so that the temperature value of the original sampled airflow is within a preset temperature range. After determining that the temperature value of the original sampled airflow is within the preset temperature range, the control module 13 may adjust at least one of the opening degree of the first adjustable air valve 1120, the opening degree of the third adjustable air valve 1122, the opening degree of the second adjustable air valve 1121, and the heating amplitude of the blowback airflow temperature control unit 113 according to the humidity value of the target sampled airflow, so as to make the humidity value of the target sampled airflow within the preset humidity range. The control module 13 may be used to control the operating state of the air pump 12.

According to the technical scheme, the target sampling air flow and the humidifying air flow are mixed to form the blowback air flow, the humidity exchange direction and efficiency of the proton exchange membrane are controlled by adjusting the humidity value and the flow of the blowback air flow through the adjustable air valve, the humidity value of the target sampling air flow entering the particulate matter sensor is maintained within the preset humidity range, and the accuracy of the concentration of the particulate matter in the determined target sampling air flow is improved.

Optionally, on the basis of the above technical solution, the particle sensor 2 may specifically include an oscillating balance sensor.

In an embodiment of the present invention, the particulate matter sensor 2 may specifically comprise an oscillating balance sensor, i.e. an air quality monitor may sample an oscillating balance method to detect the concentration of particulate matter in the target sample air stream. The oscillating balance method is one kind of on-line monitoring method for particle matter and belongs to the field of direct measurement of particle matter weight. The oscillation balance method has the working principle that a hollow oscillation element can be used in the oscillation balance sensor, the hollow oscillation element is used as a core component of the oscillation balance sensor, when the oscillation balance sensor is installed, one end of the hollow oscillation element is fixed on a fixed base, the other end of the hollow oscillation element is used as an oscillation end to oscillate freely, the free oscillation end is connected with a replaceable filter membrane and is used for collecting particles in target sampling airflow, and the hollow oscillation element and the filter membrane jointly form an oscillation system. When the oscillating balance sensor works, the oscillating system oscillates at the natural oscillating frequency under the action of exciting force provided by the oscillation driving amplifying circuit, and the oscillating frequency is measured and recorded by the detection circuit. Because the natural oscillation frequency of the oscillation system depends on the characteristics of the oscillation element and the quality of the whole oscillation system, in a certain sampling time, when a target sampling airflow passes through the filter membrane, particulate matters in the target sampling airflow can be attached to the filter membrane, so that the quality of the filter membrane can be changed, and further the quality of the whole oscillation system can be changed, and the natural oscillation frequency of the oscillation system is changed.

Based on the above, it can be understood that, because the oscillating balance sensor measures the concentration of the particulate matter in the target sampling airflow based on the mass of the filter membrane, and the filter membrane and the particulate matter absorb moisture with unequal mass under different humidity values, the mass of the filter membrane deviates from the mass of the actual filter membrane, and the determined concentration of the particulate matter in the target sampling airflow deviates. In the prior art, the air quality monitor based on the oscillating balance method can only dehumidify in one direction, and the dehumidification strength is fixed. In addition, the humidity value of the dehumidified target sampling airflow will change with the change of the air humidity, i.e. the humidity value of the target sampling airflow cannot be maintained within the preset humidity range. Because the humidity value of the target sampling air flow can not be maintained in the preset humidity range, the accuracy of the determined concentration of the particulate matters in the target sampling air flow is low.

Compared with the air quality monitor based on the vibration balance method in the prior art, the air quality monitor provided by the embodiment of the invention can maintain the humidity value of the target sampling airflow within the preset humidity range, so that the measurement precision of the air quality monitor can be improved, and the accuracy of the determined concentration of the particulate matters in the target sampling airflow can be improved.

Fig. 4 is a flowchart of a humidity control method for air quality monitoring according to an embodiment of the present invention, which is applicable to a case where a humidity value of a sampled airflow is maintained within a preset humidity range. The method may be performed by a humidity control device for air quality monitoring. The adjustable gas valves may specifically include a first adjustable gas valve, a second adjustable gas valve, and a third adjustable gas valve. The humidity conditioning module may specifically include a blowback air stream temperature control unit. The preset humidity range may be a humidity range formed by a first humidity threshold and a second humidity threshold, and the first humidity threshold may be smaller than the second humidity threshold. As shown in fig. 4, the method specifically includes the following steps:

and step 410, controlling a first temperature and humidity sensor to acquire a humidity value of the target sampling air flow through a control module.

And step 420, determining that the humidity value of the target sampling air flow is larger than or equal to the second humidity threshold value through the control module, increasing the heating amplitude of the blowback air flow temperature control unit through the control module, and increasing at least one of the opening degree of the first adjustable air valve, the opening degree of the third adjustable air valve and the opening degree of the second adjustable air valve until the humidity value of the target sampling air flow is within the preset humidity range.

And 430, determining that the humidity value of the target sampling air flow is smaller than or equal to the first humidity threshold value through the control module, reducing the heating amplitude of the blowback air flow temperature control unit through the control module, and at least one of reducing the opening degree of the first adjustable air valve, increasing the opening degree of the third adjustable air valve and increasing the opening degree of the second adjustable air valve until the humidity value of the target sampling air flow is within the preset humidity range.

In the embodiment of the invention, in order to maintain the humidity value of the target sampling air flow within the preset humidity range, the control module can be used for controlling the first temperature and humidity sensor to acquire the humidity value of the target sampling air flow, determining whether the received humidity value of the target sampling air flow acquired by the first temperature and humidity sensor is within the preset humidity range, and adjusting the opening of the air-adjustable valve according to the humidity value of the target sampling air flow according to the determination result so as to enable the humidity value of the target sampling air flow to be within the preset humidity range.

The opening degree of the adjustable air valve is adjusted by the control module according to the humidity value of the target sampling air flow, so that the humidity value of the target sampling air flow is in a preset humidity range, and the following understanding can be realized:

and determining whether the humidity value of the target sampling air flow is within a preset humidity range through the control module. If the humidity value of the target sampling air flow is not within the preset humidity range and is greater than or equal to the second humidity threshold value, it can be shown that the humidity value of the target sampling air flow is too high, and the humidity value of the target sampling air flow needs to be reduced, so that the humidity value of the target sampling air flow is within the preset humidity range. The humidity value of the target sampling air flow can be reduced in the following way, so that the humidity value of the target sampling air flow is in a preset humidity range, specifically: the method comprises the steps that firstly, the heating amplitude of a blowback airflow temperature control unit is increased through a control module according to the humidity value of target sampling airflow; the opening degree of the first adjustable air valve is adjusted to be larger and the opening degree of the third adjustable air valve is adjusted to be smaller according to the humidity value of the target sampling air flow through the control module; the opening degree of the second adjustable air valve is reduced through the control module according to the humidity value of the target sampling air flow; the heating amplitude of the blowback air flow temperature control unit is increased, and the opening degree of the first adjustable air valve is increased and the opening degree of the third adjustable air valve is decreased according to the humidity value of the target sampling air flow through the control module; the heating amplitude of the blowback air flow temperature control unit is increased and the opening degree of the second adjustable air valve is reduced through the control module according to the humidity value of the target sampling air flow; adjusting the opening degree of the first adjustable air valve, the opening degree of the third adjustable air valve and the opening degree of the second adjustable air valve to be smaller through the control module according to the humidity value of the target sampling air flow; and in the seventh mode, the heating amplitude of the blowback air flow temperature control unit is increased, the opening degree of the first adjustable air valve is increased, the opening degree of the third adjustable air valve is decreased, and the opening degree of the second adjustable air valve is decreased according to the humidity value of the target sampling air flow through the control module. The humidity value of the target sampling air flow can be reduced in the above mode until the humidity value of the target sampling air flow is within the preset humidity range.

And determining whether the humidity value of the target sampling air flow is within a preset humidity range through the control module. If the humidity value of the target sampling air flow is not within the preset humidity range and the humidity value of the target sampling air flow is smaller than or equal to the first humidity threshold value, it can be shown that the humidity value of the target sampling air flow is too low, and the humidity value of the target sampling air flow needs to be increased, so that the humidity value of the target sampling air flow is within the preset humidity range. The humidity value of the target sampling air flow can be increased in the following manner, so that the humidity value of the target sampling air flow is within a preset humidity range, specifically: the method comprises the following steps that firstly, the heating amplitude of a blowback airflow temperature control unit is reduced through a control module according to the humidity value of target sampling airflow; the opening degree of the first adjustable air valve is adjusted to be smaller and the opening degree of the third adjustable air valve is adjusted to be larger according to the humidity value of the target sampling air flow through the control module; the opening degree of the second adjustable air valve is adjusted to be larger through the control module according to the humidity value of the target sampling air flow; the heating amplitude of the blowback air flow temperature control unit is reduced, and the opening degree of the first adjustable air valve is reduced and the opening degree of the third adjustable air valve is increased according to the humidity value of the target sampling air flow through the control module; the heating amplitude of the blowback air flow temperature control unit is reduced and the opening degree of the second adjustable air valve is increased through the control module according to the humidity value of the target sampling air flow; adjusting the opening degree of the first adjustable air valve to be smaller, adjusting the opening degree of the third adjustable air valve to be larger and adjusting the opening degree of the second adjustable air valve to be larger according to the humidity value of the target sampling air flow through the control module; and according to the humidity value of the target sampling air flow, the heating amplitude of the blowback air flow temperature control unit is reduced, the opening degree of the first adjustable air valve is reduced, the opening degree of the third adjustable air valve is increased, and the opening degree of the second adjustable air valve is increased. The humidity value of the target sampling air flow can be increased in the above mode until the humidity value of the target sampling air flow is within the preset humidity range.

It should be noted that, when the humidity value of the target sampling air flow is not within the preset humidity range, and the humidity value of the target sampling air flow is adjusted in at least two ways, so that the humidity value of the target sampling air flow is adjusted within the preset humidity range, the execution sequence of the at least two ways may be set according to the actual situation, which is not specifically limited herein. That is, if the control module can adjust the opening degree of the first adjustable air valve and the opening degree of the third adjustable air valve according to the humidity value of the target sampling air flow, and adjust the opening degree of the second adjustable air valve so that the humidity value of the target sampling air flow is within the preset humidity range, the opening degree of the first adjustable air valve and the opening degree of the third adjustable air valve are adjusted, and the sequence of adjusting the opening degrees of the second adjustable air valve can be set according to the actual situation, which is not specifically limited herein. If the control module can adjust the opening degree of the first adjustable air valve and the opening degree of the third adjustable air valve according to the humidity value of the target sampling air flow, and adjust the heating amplitude of the blowback air flow temperature control unit so that the humidity value of the target sampling air flow is within the preset humidity range, the opening degree of the first adjustable air valve and the opening degree of the third adjustable air valve are adjusted, and the sequence of adjusting the blowback air flow temperature control unit can be set according to the actual situation, and is not particularly limited herein. If the control module can adjust the opening degree of the first adjustable air valve and the opening degree of the third adjustable air valve according to the humidity value of the target sampling air flow, the opening degree of the second adjustable air valve is adjusted, the heating amplitude of the blowback air flow temperature control unit is adjusted, so that the humidity value of the target sampling air flow is in a preset humidity range, the opening degree of the first adjustable air valve and the opening degree of the third adjustable air valve are adjusted, the opening degree of the second adjustable air valve is adjusted, the sequence of adjusting the heating amplitude of the blowback air flow temperature control unit can be set according to actual conditions, and the method is not particularly limited.

For example, if the control module determines that the humidity value of the target sampled airflow is greater than or equal to the second humidity threshold, the control module may decrease the opening of the second adjustable air valve, increase the opening of the first adjustable air valve and decrease the opening of the third adjustable air valve, and increase the heating amplitude of the blowback airflow temperature control unit, such that the humidity value of the target sampled airflow is within the preset humidity range, decrease the opening of the second adjustable air valve, increase the opening of the first adjustable air valve and decrease the opening of the third adjustable air valve, and increase the heating amplitude of the blowback airflow temperature control unit without specific limitation, may first decrease the opening of the second adjustable air valve, and may then increase the first adjustable opening and decrease the third adjustable opening if the opening of the second adjustable air valve is the minimum opening and the humidity value of the target sampled airflow is still greater than or equal to the second humidity threshold, if the opening degree of the first adjustable air valve is the maximum opening degree and the opening degree of the third adjustable air valve is the minimum opening degree, and the humidity value of the target sampling air flow is still larger than or equal to the second humidity threshold value, the heating amplitude of the blowback air flow temperature control unit can be increased again until the humidity value of the target sampling air flow is adjusted to be within the preset humidity range.

The first-to-last adjusting sequence comprises the steps of reducing the opening degree of the second adjustable air valve, increasing the opening degree of the first adjustable air valve and reducing the opening degree of the third adjustable air valve in sequence, and increasing the heating amplitude of the blowback air flow temperature control unit. It is understood that the adjustment sequence from first to last may also be in the following ways: the opening degree of the second adjustable air valve is reduced, the heating amplitude of the blowback air flow temperature control unit is increased, the opening degree of the first adjustable air valve is increased, and the opening degree of the third adjustable air valve is reduced; the opening degree of the first adjustable air valve is increased, the opening degree of the third adjustable air valve is decreased, the opening degree of the second adjustable air valve is decreased, and the heating amplitude of the blowback air flow temperature control unit is increased; the opening degree of the first adjustable air valve is adjusted to be larger, the opening degree of the third adjustable air valve is adjusted to be smaller, the heating amplitude of the blowback air flow temperature control unit is increased, and the opening degree of the second adjustable air valve is adjusted to be smaller; increasing the heating amplitude of the blowback air flow temperature control unit, reducing the opening degree of the second adjustable air valve, increasing the opening degree of the first adjustable air valve and reducing the opening degree of the third adjustable air valve; and increasing the heating amplitude of the blowback air flow temperature control unit, increasing the opening degree of the first adjustable air valve, decreasing the opening degree of the third adjustable air valve and decreasing the opening degree of the second adjustable air valve. It can also be understood that, in the above-mentioned adjusting process, if the control module determines that the humidity value of the target sampling air flow is within the preset humidity range, the humidity value adjustment of the target sampling air flow is completed, and the subsequent adjusting operation is not required to be executed.

If the control module determines that the humidity value of the target sampling air flow is smaller than or equal to the first humidity threshold value, the control module may decrease the heating amplitude of the blowback air flow temperature control unit, decrease the opening of the first adjustable air valve, increase the opening of the third adjustable air valve, and increase the opening of the second adjustable air valve according to the humidity value of the target sampling air flow so that the humidity value of the target sampling air flow is within the preset humidity range, decrease the heating amplitude of the blowback air flow temperature control unit, decrease the opening of the first adjustable air valve and increase the opening of the third adjustable air valve, and the sequence of increasing the opening of the second adjustable air valve is not specifically limited, that is, decrease the heating amplitude of the blowback air flow temperature control unit first, and if the heating amplitude of the blowback air flow temperature control unit is the minimum amplitude, the humidity value of the target sampling air flow is still smaller than or equal to the first humidity threshold value, and if the opening degree of the first adjustable air valve is the minimum opening degree and the opening degree of the third adjustable air valve is the maximum opening degree, and the humidity value of the target sampling air flow is still smaller than or equal to the first humidity threshold value, the opening degree of the second adjustable air valve can be increased again until the humidity value of the target sampling air flow is adjusted to be within the preset humidity range.

The first-to-last adjusting sequence is to reduce the heating amplitude of the blowback air flow temperature control unit, reduce the opening degree of the first adjustable air valve, increase the opening degree of the third adjustable air valve and increase the opening degree of the second adjustable air valve. It is understood that the adjustment sequence from first to last may also be in the following ways: the heating amplitude of the blowback air flow temperature control unit is reduced, the opening degree of the second adjustable air valve is increased, the opening degree of the first adjustable air valve is decreased, and the opening degree of the third adjustable air valve is increased; the opening degree of the first adjustable air valve is adjusted to be smaller, the opening degree of the third adjustable air valve is adjusted to be larger, the heating amplitude of the blowback air flow temperature control unit is reduced, and the opening degree of the second adjustable air valve is adjusted to be larger; the opening degree of the first adjustable air valve is adjusted to be smaller, the opening degree of the third adjustable air valve is adjusted to be larger, the opening degree of the second adjustable air valve is adjusted to be larger, and the heating amplitude of the blowback air flow temperature control unit is reduced; the opening degree of the second adjustable air valve is increased, the heating amplitude of the blowback air flow temperature control unit is reduced, and the opening degree of the first adjustable air valve is decreased and the opening degree of the third adjustable air valve is increased; and the opening degree of the second adjustable air valve is increased, the opening degree of the first adjustable air valve is decreased, the opening degree of the third adjustable air valve is increased, and the heating amplitude of the blowback air flow temperature control unit is reduced. It can also be understood that, in the above-mentioned adjusting process, if the control module determines that the humidity value of the target sampling air flow is within the preset humidity range, the humidity value adjustment of the target sampling air flow is completed, and the subsequent adjusting operation is not required to be executed.

According to the technical scheme, the target sampling air flow and the humidifying air flow are mixed to form the blowback air flow, and the humidity exchange direction and efficiency of the proton exchange membrane are controlled by adjusting the humidity value and the flow of the blowback air flow through the adjustable air valve, so that the humidity value of the target sampling air flow is maintained within the preset humidity range, and the accuracy of the concentration of the particles in the determined target sampling air flow is improved.

Optionally, on the basis of the above technical scheme, the temperature control module may further include a temperature control film, and the temperature control module may specifically include an original sampling airflow temperature control unit and a second temperature and humidity sensor.

Before the humidity value that gathers target sample air current through first temperature and humidity sensor of control module control, specifically can also include: and controlling a second temperature and humidity sensor to acquire the temperature value of the original sampling air flow through a control module. The heating amplitude of the original sampling air flow temperature control unit is adjusted through the control module according to the temperature value of the original sampling air flow, so that the temperature value of the original sampling air flow is in a preset temperature range.

In the embodiment of the present invention, in order to maintain the temperature value of the original sampling air flow within the preset temperature range, so as to avoid that the humidity exchange efficiency of the proton exchange membrane is reduced due to the occurrence of condensed water in the original sampling air flow entering the humidity exchange module, the humidity control device for monitoring the air quality may further be provided with a temperature control module. The control module controls the second temperature and humidity sensor to collect the temperature value of the original sampling air flow, determines whether the received temperature value of the original sampling air flow collected by the second temperature and humidity sensor is within a preset humidity range, and adjusts the heating amplitude of the original sampling air flow temperature control unit according to the temperature value of the original sampling air flow according to the determination result so that the temperature value of the original sampling air flow is within the preset temperature range.

Optionally, on the basis of the above technical solution, the preset temperature range may be a temperature range formed by a first temperature threshold and a second temperature threshold, and the first temperature threshold is smaller than the second temperature threshold.

The heating amplitude of the original sampling air flow temperature control unit is adjusted through the control module according to the temperature value of the original sampling air flow, so that the temperature value of the original sampling air flow is within a preset temperature range, and the method specifically comprises the following steps:

and determining that the temperature value of the original sampled airflow is greater than or equal to the second temperature threshold value through the control module, and reducing the heating amplitude of the temperature control unit of the original sampled airflow through the control module until the temperature value of the original sampled airflow is within the preset temperature range.

And determining that the temperature value of the original sampling air flow is less than or equal to a first temperature threshold value through the control module, and increasing the heating amplitude of the temperature control unit of the original sampling air flow through the control module until the temperature value of the original sampling air flow is within a preset temperature range.

In the embodiment of the present invention, the control module determines that the temperature value of the original sampled airflow is greater than or equal to the second temperature threshold, which may indicate that the temperature value of the original sampled airflow is too high, and the temperature value of the original sampled airflow needs to be reduced, so that the temperature value of the original sampled airflow is within the preset temperature range.

The control module determines that the temperature value of the original sampling air flow is smaller than or equal to the first temperature threshold value, which indicates that the temperature value of the original sampling air flow is too low and needs to be increased, so that the temperature value of the original sampling air flow is within a preset temperature range.

Fig. 5 is a flowchart of another humidity control method for air quality monitoring according to an embodiment of the present invention, which is applicable to a case where a humidity value of a sampled airflow is maintained within a preset humidity range. The method may be performed by a humidity control device for air quality monitoring. As shown in fig. 5, the method specifically includes the following steps:

and 510, controlling a first temperature and humidity sensor to acquire a humidity value of the target sampling air flow through a control module, and controlling a second temperature and humidity sensor to acquire a temperature value of the original sampling air flow through the control module.

Step 520, determining whether the temperature value of the original sampling airflow is within a preset temperature value range through a control module; if yes, go to step 530; if not, go to step 540 or step 550.

Step 530, determining whether the humidity value of the target sampling air flow is within a preset humidity range through a control module; if yes, go to step 560; if not, step 570 or step 580 is performed.

And 540, determining that the temperature value of the original sampled airflow is greater than or equal to the second temperature threshold value through the control module, reducing the heating amplitude of the temperature control unit of the original sampled airflow through the control module until the temperature value of the original sampled airflow is within the preset temperature range, and returning to execute 530.

Step 550, determining that the temperature value of the original sampled airflow is smaller than or equal to the first temperature threshold value through the control module, increasing the heating amplitude of the original sampled airflow temperature control unit through the control module until the temperature value of the original sampled airflow is within the preset temperature range, and returning to execute step 530.

And step 560, completing the humidity value adjustment of the target sampling air flow.

And 570, determining that the humidity value of the target sampling air flow is greater than or equal to the second humidity threshold value through the control module, increasing the heating amplitude of the blowback air flow temperature control unit through the control module, and increasing at least one of the opening degree of the first adjustable air valve, the opening degree of the third adjustable air valve and the opening degree of the second adjustable air valve until the humidity value of the target sampling air flow is within the preset humidity range.

And 580, determining that the humidity value of the target sampling air flow is smaller than or equal to the first humidity threshold value through the control module, reducing the heating amplitude of the blowback air flow temperature control unit through the control module, and at least one of reducing the opening degree of the first adjustable air valve, increasing the opening degree of the third adjustable air valve and increasing the opening degree of the second adjustable air valve until the humidity value of the target sampling air flow is within a preset humidity range.

According to the technical scheme, the temperature value of the original sampling air flow is controlled to be maintained within the preset temperature range, condensate water can be prevented from appearing in the original sampling air flow entering the humidity exchange module, the reaction working point of humidity exchange of the proton exchange membrane is improved, and the humidity exchange efficiency of the proton exchange membrane is further improved. On the basis, the humidity value adjusting range of the target sampling air flow is expanded, and the humidity value adjusting precision of the target sampling air flow is improved. Meanwhile, the target sampling air flow and the humidifying air flow are mixed to form the blowback air flow, and the humidity value and the flow of the blowback air flow are adjusted through the adjustable air valve and/or the blowback air flow temperature control unit, so that the humidity exchange direction and the efficiency of the proton exchange membrane are controlled, the humidity value of the target sampling air flow is maintained within a preset humidity range, and the accuracy of the concentration of the particles in the determined target sampling air flow is improved.

The present embodiment is a specific example of the above-described embodiments. The present embodiment is applicable to a case where the humidity value of the sampled air flow is maintained within the preset humidity range, and the method may be performed by a humidity control apparatus for air quality monitoring. The method specifically comprises the following steps:

601, controlling a first temperature and humidity sensor to acquire a humidity value of a target sampling air flow through a control module, and controlling a second temperature and humidity sensor to acquire a temperature value of an original sampling air flow through the control module.

Step 602, determining whether the temperature value of the original sampling airflow is within a preset temperature value range through a control module; if yes, go to step 603; if not, go to step 604 or step 605.

Step 603, determining whether the humidity value of the target sampling air flow is within a preset humidity range through a control module; if yes, go to step 606; if not, go to step 607 or step 608.

Step 604, determining that the temperature value of the original sampled airflow is greater than or equal to the second temperature threshold value through the control module, reducing the heating amplitude of the temperature control unit of the original sampled airflow through the control module until the temperature value of the original sampled airflow is within the preset temperature range, and returning to execute step 603.

Step 605, determining that the temperature value of the original sampled airflow is smaller than or equal to the first temperature threshold value through the control module, increasing the heating amplitude of the temperature control unit of the original sampled airflow through the control module until the temperature value of the original sampled airflow is within the preset temperature range, and returning to execute step 603.

And step 606, completing the humidity value adjustment of the target sampling air flow.

And 607, determining that the humidity value of the target sampling air flow is greater than or equal to the second humidity threshold value through the control module, and reducing the opening degree of the second adjustable air valve through the control module.

Step 608, determining whether the humidity value of the target sampling air flow is within a preset humidity range through the control module; if yes, go back to step 606; if not, go to step 609.

Step 609, determining whether the second adjustable air valve is in the minimum opening degree or not through the control module; if yes, go to step 610; if not, the process returns to step 607.

And step 610, the opening degree of the first adjustable air valve is adjusted to be larger and the opening degree of the third adjustable air valve is adjusted to be smaller through the control module.

611, determining whether the humidity value of the target sampling air flow is within a preset humidity range through a control module; if yes, go back to step 606; if not, go to step 612.

Step 612, determining whether the opening degree of the first adjustable air valve is the maximum opening degree and the opening degree of the third adjustable air valve is the minimum opening degree through the control module; if yes, go to step 613; if not, go back to step 610.

613, increasing the heating amplitude of the blowback air flow temperature control unit through the control module.

614, determining whether the humidity value of the target sampling air flow is within a preset humidity range through the control module; if yes, go back to step 606; if not, go to step 615.

And 615, continuously increasing the heating amplitude of the temperature control unit of the blowback air flow through the control module until the humidity value of the target sampling air flow is within the preset humidity range.

And 616, determining that the humidity value of the target sampling airflow is smaller than or equal to the first humidity threshold value through the control module, and reducing the heating amplitude of the blowback airflow temperature control unit through the control module.

Step 617, determining whether the humidity value of the target sampling air flow is within a preset humidity range through the control module; if yes, go back to step 606; if not, go to step 618.

Step 618, determining whether the heating amplitude of the blowback air flow temperature control unit is the minimum heating amplitude through the control module; if yes, go back to step 616; if not, go to step 619.

And step 619, the opening degree of the first adjustable air valve is reduced and the opening degree of the third adjustable air valve is increased or decreased through the control module.

Step 620, determining whether the humidity value of the target sampling air flow is within a preset humidity range through a control module; if yes, go back to step 606; if not, go to step 621.

Step 621, determining whether the opening degree of the first adjustable air valve is the minimum opening degree and the opening degree of the third adjustable air valve is the maximum opening degree through the control module; if yes, go to step 622; if not, the process returns to step 619.

And 622, opening degree of the second adjustable air valve is adjusted to be larger through the control module.

Step 623, determining whether the humidity value of the target sampling air flow is within a preset humidity range through a control module; if yes, go back to step 606; if not, go to step 624.

And step 624, continuing to increase the opening of the second adjustable air valve through the control module until the humidity value of the target sampling air flow is within the preset humidity range.

The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention and are not intended to limit the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A humidity control device for air quality monitoring, comprising: the humidity control system comprises a humidity exchange module, a humidity adjusting module, an air pump and a control module; the humidity exchange module comprises a humidity exchange pipeline, and the humidity exchange pipeline comprises a proton exchange membrane; the humidity adjusting module comprises a first temperature and humidity sensor, a humidifier and an adjustable air valve; the humidity exchange module, the humidity adjusting module and the air pump are connected in pairs respectively, and the control module is connected with the humidity exchange module, the humidity adjusting module and the air pump respectively;

2. The humidity control device for air quality monitoring according to claim 1, further comprising a temperature control module, wherein the temperature control module comprises a raw sampling air flow temperature control unit and a second temperature and humidity sensor; the temperature control module is respectively connected with the humidity exchange module and the control module;

the control module is further used for controlling the second temperature and humidity sensor to collect the temperature value of the original sampling air flow, and adjusting the heating amplitude of the original sampling air flow temperature control unit according to the temperature value of the original sampling air flow, so that the temperature value of the original sampling air flow is within a preset temperature range.

3. A humidity control device for air quality monitoring according to claim 1 or 2, wherein the humidity conditioning module further comprises a blowback air stream temperature control unit; the blowback airflow temperature control unit is respectively connected with the adjustable air valve, the humidity exchange module and the control module;

the control module is used for controlling the first temperature and humidity sensor to collect the humidity value of the target sampling airflow, adjusting the opening degree of the air adjustable valve according to the humidity value of the target sampling airflow, and/or adjusting the heating amplitude of the blowback airflow temperature control unit, so that the humidity value of the target sampling airflow is within a preset humidity range, and controlling the working state of the air pump.

4. A humidity control device for air quality monitoring according to claim 3 wherein the variable air valves include a first variable air valve, a second variable air valve, and a third variable air valve; the first adjustable air valve is respectively connected with the second adjustable air valve and the third adjustable air valve, the second adjustable air valve is respectively connected with the humidifier and the blowback air flow temperature control unit, and the third adjustable air valve is also connected with the air pump;

the blowback gas flow is formed by mixing a first target branch sampling gas flow and a humidifying gas flow passing through the humidifier and the second adjustable gas valve, and the first target branch sampling gas flow is a target sampling gas flow of the target sampling gas flow passing through the first adjustable gas valve;

the second target branch sampling airflow is the target sampling airflow of the target sampling airflow passing through the third adjustable air valve, and the second target branch sampling airflow is discharged through the air outlet of the air pump;

the control module is used for controlling the first temperature and humidity sensor to collect the humidity value of the target sampling air flow, adjusting the opening degree of the first adjustable air valve and the opening degree of the third adjustable air valve according to the humidity value of the target sampling air flow, adjusting the opening degree of the second adjustable air valve and adjusting at least one of the heating amplitudes of the blowback air flow temperature control unit, so that the humidity value of the target sampling air flow is within a preset humidity range, and controlling the working state of the air pump.

5. The humidity control device for air quality monitoring according to claim 1 or 2, wherein the humidity exchange module further comprises a sleeve and a third temperature and humidity sensor; the humidity exchange pipeline is arranged inside the sleeve, the third temperature and humidity sensor is arranged on the inner surface of the sleeve, and the sleeve is provided with an original sampling airflow inlet, a target sampling airflow outlet, a blowback airflow inlet and a blowback airflow outlet; the blowback airflow outlet is connected with the air pump;

the original sampling airflow enters the interior of the humidity exchange pipeline through the original sampling airflow inlet, the blowback airflow enters an area formed by the exterior of the humidity exchange pipeline and the inner surface of the sleeve through the blowback airflow inlet, and the flow directions of the original sampling airflow and the blowback airflow are opposite;

the control module is further used for controlling the third temperature and humidity sensor to collect the humidity value of the blowback airflow, adjusting the opening degree of the adjustable air valve according to the humidity value of the target sampling airflow and/or the humidity value of the blowback airflow to enable the humidity of the target sampling airflow to be within a preset humidity range, and controlling the working state of the air pump.

6. A humidity control device for air quality monitoring according to claim 1 or 2, wherein the humidity conditioning module further comprises a first filter; the first filter is connected with the humidifier;

the first filter is for filtering the air flow entering the humidifier.

7. An air quality monitor comprising the humidity control device for air quality monitoring of any one of claims 1 to 6, further comprising a particulate matter sensor; the humidity adjusting module further comprises a flow controller and a second filter; the second filter is respectively connected with the flow controller and the particulate matter sensor, and the flow controller is also connected with the control module;

the second filter is used for filtering the target sampling airflow;

8. A humidity control method for air quality monitoring applied to the humidity control device for air quality monitoring as claimed in claim 4, comprising: the adjustable air valves comprise a first adjustable air valve, a second adjustable air valve and a third adjustable air valve; the humidity adjusting module comprises a blowback airflow temperature control unit; the preset humidity range is a humidity range formed by a first humidity threshold and a second humidity threshold, and the first humidity threshold is smaller than the second humidity threshold;

9. The humidity control method for air quality monitoring according to claim 8, further comprising a temperature control module, wherein the temperature control module comprises a raw sampling airflow temperature control unit and a second temperature and humidity sensor;

before the control module controls the first temperature and humidity sensor to collect the humidity value of the target sampling airflow, the method further comprises the following steps:

controlling the second temperature and humidity sensor to acquire a temperature value of the original sampling airflow through the control module;

and adjusting the heating amplitude of the original sampling air flow temperature control unit through the control module according to the temperature value of the original sampling air flow so as to enable the temperature value of the original sampling air flow to be within a preset temperature range.

10. A humidity control method for air quality monitoring according to claim 9 wherein the preset temperature range is a temperature range formed by a first temperature threshold and a second temperature threshold, the first temperature threshold being less than the second temperature threshold;

the adjusting, by the control module, the heating amplitude of the original sampling airflow temperature control unit according to the temperature value of the original sampling airflow so that the temperature value of the original sampling airflow is within a preset temperature range includes:

determining, by the control module, that the temperature value of the original sampled airflow is greater than or equal to the second temperature threshold, and reducing, by the control module, the heating amplitude of the original sampled airflow temperature control unit until the temperature value of the original sampled airflow is within the preset temperature range;

and determining that the temperature value of the original sampling air flow is smaller than or equal to the first temperature threshold value through the control module, and increasing the heating amplitude of the original sampling air flow temperature control unit through the control module until the temperature value of the original sampling air flow is within the preset temperature range.