CN119835911A - Air outlet control method of cooling unit and cooling unit - Google Patents
Air outlet control method of cooling unit and cooling unit Download PDFInfo
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- CN119835911A CN119835911A CN202411950606.1A CN202411950606A CN119835911A CN 119835911 A CN119835911 A CN 119835911A CN 202411950606 A CN202411950606 A CN 202411950606A CN 119835911 A CN119835911 A CN 119835911A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
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- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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Abstract
本申请公开了一种冷却机组的出风控制方法及冷却机组，该出风控制方法包括：确定冷却机组是否正常运行；在确定冷却机组是处于正常运行状态时，基于室内送风和回风的温度差获取室内风机的转速需求；在确定冷却机组是处于异常运行状态时，基于室内送风温度获取室内风机的转速需求；再基于室内风机的转速需求线性调节室内风机的转速。本申请在冷却机组处于正常运行时，可以基于室内送风和回风的温度差控制室内风机的转速，从而可以保证冷却机组送风满足室内气流要求；在冷却机组处于异常运行时，可以基于室内送风温度控制室内风机的转速，使室内风机运行下限转速，以减少冷却机组向室内送热风，避免室内温度过高，从而保证室内其他电子设备正常工作。
The present application discloses an air outlet control method for a cooling unit and a cooling unit, the air outlet control method comprising: determining whether the cooling unit is operating normally; when determining that the cooling unit is in a normal operating state, obtaining the speed requirement of the indoor fan based on the temperature difference between the indoor supply air and the return air; when determining that the cooling unit is in an abnormal operating state, obtaining the speed requirement of the indoor fan based on the indoor supply air temperature; and then linearly adjusting the speed of the indoor fan based on the speed requirement of the indoor fan. When the cooling unit is in normal operation, the present application can control the speed of the indoor fan based on the temperature difference between the indoor supply air and the return air, thereby ensuring that the air supply of the cooling unit meets the indoor air flow requirements; when the cooling unit is in abnormal operation, the speed of the indoor fan can be controlled based on the indoor supply air temperature, so that the indoor fan operates at a lower limit speed, so as to reduce the cooling unit from sending hot air to the room, avoid excessively high indoor temperature, and thus ensure the normal operation of other electronic equipment in the room.
Description
Technical Field
The application relates to the technical field of refrigeration, in particular to an air outlet control method of a cooling unit and the cooling unit.
Background
With rapid development of information technology, servers, storage devices, network devices and the like in a data center are more and more precise, and functions are also more and more large. However, when the devices work, heat is generated to raise the temperature of the devices, if the temperature of the devices is too high, the normal work of the devices can be affected, so that in order to ensure the normal operation of the devices, the devices need to be cooled down, and a direct expansion refrigeration system or a chilled water system is usually adopted to cool down the devices.
In the process of implementing the invention, the inventor finds that at least the following problems exist in the prior art:
The electronic components in the above devices are very temperature sensitive and small temperature variations may affect their performance and stability. For example, the high temperature may cause the decrease of the operation speed of the chip, the increase of the error rate, and even damage to the electronic components, and when the precision air conditioner of the direct expansion refrigeration system commonly used in the data center performs the dual power switching in the front power failure, the restarting of the compressor in the direct expansion refrigeration system may cause the short-time loss of the cold energy of the system, so that the condition that the air conditioner continuously sends hot air occurs. At the tail end of a common chilled water system of the data center, under the scene of water valve faults, the air outlet temperature of an air conditioner at the tail end of the chilled water is out of control due to the out of control of the water valve.
Disclosure of Invention
In order to effectively overcome the problems in the prior art, the main object of the present application is to provide an air outlet control method of a cooling unit and a cooling unit capable of avoiding the excessive indoor temperature caused by the supply of hot air to the indoor.
In order to achieve the above purpose, the present application specifically adopts the following technical scheme:
The application provides an air outlet control method of a cooling unit, which comprises an indoor fan, wherein the indoor fan is used for enabling indoor air to circularly flow through the cooling unit so as to cool the indoor, and the air outlet control method comprises the following steps:
determining whether the cooling unit operates normally;
when the cooling unit is in a normal running state, acquiring the rotating speed requirement of the indoor fan based on the temperature difference of indoor air supply and air return;
when the cooling unit is determined to be in an abnormal operation state, acquiring the rotating speed requirement of the indoor fan based on the indoor air supply temperature;
Linearly adjusting the rotational speed of the indoor fan based on the rotational speed requirement of the indoor fan;
The rotating speed of the indoor fan is controlled to be higher as the rotating speed requirement of the indoor fan is higher.
In some embodiments, the obtaining the rotation speed requirement of the indoor fan based on the temperature difference between the indoor air supply and the indoor air return specifically includes:
And calculating the rotating speed requirement H of the indoor fan according to the formula H= (W1-W2)/W3 by 100%, wherein W1 is the temperature difference between indoor actual air supply and indoor air return, W2 is the temperature difference between indoor target air supply and indoor air return, and W3 is the sensitivity.
In some embodiments, the obtaining the rotation speed requirement of the indoor fan based on the indoor air supply temperature specifically includes:
And calculating the rotating speed requirement H of the indoor fan according to the formula H= (T2-T1)/T3 by 100%, wherein T1 is the indoor actual air supply temperature, T2 is the indoor target air supply temperature, and T3 is the sensitivity.
In some embodiments, the determining whether the cooling unit is operating normally is specifically:
detecting whether the air supply temperature of the indoor fan is higher than a preset air supply temperature;
when the air supply temperature of the indoor fan is higher than the preset air supply temperature, determining that the cooling unit is in an abnormal running state;
and when the air supply temperature of the indoor fan is smaller than or equal to the preset air supply temperature, determining that the cooling unit is in a normal running state.
In some embodiments, the determining whether the cooling unit is operating normally is specifically:
Whether the cooling unit is operating properly is determined based on operating parameters of the components of the cooling unit.
In some embodiments, the linearly adjusting the rotational speed of the indoor fan based on the rotational speed demand of the indoor fan comprises:
When the rotating speed requirement H of the indoor fan is 0% < H <100%, controlling the ratio V of the actual rotating speed of the indoor fan to the rated maximum rotating speed to be 20% < V <100%;
When the rotating speed requirement H of the indoor fan is less than or equal to 0%, controlling the ratio V of the actual rotating speed of the indoor fan to the rated maximum rotating speed to be 20%;
When the rotating speed requirement H of the indoor fan is 100 percent or less than H, controlling the ratio V of the actual rotating speed of the indoor fan to the rated maximum rotating speed to be 100 percent.
Correspondingly, the application also provides a cooling unit, which comprises:
A cooling assembly for providing a cooling medium;
The indoor fan is used for enabling indoor air to circulate through the cooling assembly so that the indoor air can exchange heat with the cooling medium to cool the indoor;
The controller is connected with the indoor fan and is used for determining whether the cooling unit normally operates or not, and acquiring the rotating speed requirement of the indoor fan based on the temperature difference of indoor air supply and air return when the cooling unit is determined to be in a normal operation state;
the controller is also used for linearly adjusting the rotating speed of the indoor fan based on the rotating speed requirement of the indoor fan, wherein the rotating speed of the indoor fan is controlled to be higher as the rotating speed requirement of the indoor fan is higher.
In some embodiments, when the rotational speed requirement of the indoor fan is obtained based on the temperature difference between the indoor supply air and the return air, the controller is further configured to calculate the rotational speed requirement H of the indoor fan by the formula h= (W1-W2)/W3 x 100%, where W1 is the temperature difference between the indoor actual supply air and the return air, W2 is the temperature difference between the indoor target supply air and the return air, and W3 is the sensitivity.
In some embodiments, when the rotational speed requirement of the indoor fan is obtained based on the indoor air supply temperature, the controller is further configured to calculate the rotational speed requirement H of the indoor fan according to a formula h= (T2-T1)/T3×100%, where T1 is an indoor actual air supply temperature, T2 is an indoor target air supply temperature, and T3 is sensitivity.
In some embodiments, the cooling unit is a direct expansion refrigeration unit or a chilled water refrigeration unit.
According to the air outlet control method, the running state of the cooler assembly is determined, when the cooling unit is in the normal running state, the rotating speed requirement of the indoor fan is obtained based on the temperature difference of indoor air supply and air return, when the cooling unit is in the abnormal running state, the rotating speed requirement of the indoor fan is obtained based on the indoor air supply temperature, and then the rotating speed of the indoor fan is linearly adjusted based on the rotating speed requirement of the indoor fan. Compared with the prior art, when the cooling unit is in normal operation, the rotating speed of the indoor fan can be controlled based on the temperature difference of indoor air supply and air return, so that the air supply of the cooling unit can be ensured to meet the indoor air flow requirement, the indoor temperature is kept within the preset temperature range, and further, the normal operation of other indoor electronic equipment is ensured, and when the cooling unit is in abnormal operation, the rotating speed of the indoor fan can be controlled based on the indoor air supply temperature, so that the lower limit rotating speed of the indoor fan is operated, the air supply of the cooling unit to the indoor is reduced, the overhigh indoor temperature is avoided, and the normal operation of other indoor electronic equipment is ensured.
Drawings
Fig. 1 is a block diagram of a cooling unit according to an embodiment of the present application.
Fig. 2 is a flowchart of an air outlet control method of a cooling unit according to an embodiment of the present application.
Detailed Description
The present application will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present application more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application.
In the description of the present application, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying any particular importance unless otherwise expressly specified or stated, the term "plurality" is intended to be broadly construed, such as "connected" or "fixed" in either a fixed or removable or integral or electrical connection, or may be directly or indirectly connected via an intervening medium. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.
In the description of the present specification, it should be understood that the terms "upper", "lower", and the like used in the embodiments of the present application are described in terms of the angles shown in the drawings, and should not be construed as limiting the embodiments of the present application. In the context of this document, it will also be understood that when an element is referred to as being "on" or "under" another element, it can be directly on the other element or be indirectly on the other element through intervening elements.
In the related art, in order to ensure the stability of the temperature of some indoor environments (such as a machine room), some refrigeration systems (such as an air conditioner) are required to cool the indoor environments, and the refrigeration systems commonly used at present are a direct expansion refrigeration system and a chilled water system.
For the direct expansion refrigerating system, when the power supply is in a problem and double power supply switching is needed, the compressor is restarted to possibly cause the direct expansion refrigerating system to lose short-time cold energy, so that the condition that the direct expansion refrigerating system continuously supplies hot air occurs, because if the rotating speed of a fan is fixed, the temperature difference of inlet air and outlet air of a server is unchanged under the condition that the load of the server is unchanged, if the primary inlet air temperature of the server is 25 ℃, the outlet air temperature is 38 ℃, and if the air supply temperature of a cooling unit is increased to 30 ℃, the outlet air temperature of the server reaches 43 ℃, namely the highest temperature of the environment where the server is located is 43 ℃, and therefore the condition that performance is attenuated or even burnt is possible to occur. The temperature difference allowed by the data center is generally + -2 ℃, and the target air inlet is 25 ℃ and exceeds 27 ℃ even if hot air is sent.
In order to prevent the high temperature of a machine room, the prior data center generally requires that a compressor is started within 30s after power supply switching and runs at full frequency within 120s, so that the time for losing the cold quantity of the air cooling tail end of a direct expansion refrigeration system is shortened as much as possible, and the risk of the high temperature of the machine room is reduced. However, the method of quickly starting the compressor still has short cold loss, and the temperature reduction after the direct expansion refrigerating system is operated has certain hysteresis, and the risk of high temperature of a machine room caused by short hot air blowing still exists.
For a chilled water refrigeration system, the water valve fault is generally output to give an alarm to prompt maintenance personnel to maintain, but the tail end of the chilled water refrigeration system still keeps in an operating state. The mode of keeping the original opening operation after the water valve fails can be used for generating a scene that the chilled water refrigerating system sends hot air to the machine room after the front-end water supply temperature rises if the maintenance personnel are not overhauled timely, and the risk of causing the high temperature of the machine room also exists. Because, after the water valve is out of order, the air supply temperature of the unit cannot be adjusted, and the air supply temperature may be higher, that is, the actual air supply temperature is higher than the target air supply temperature.
The rotating speed of the indoor fan of the air conditioner of the existing machine room is controlled based on the temperature difference of air supply and air return, no matter the direct expansion refrigerating system or the chilled water refrigerating system, when the power supply is switched or the water valve is in fault, the load of the machine room is not changed, the heat exchange capacity of the cooling unit is reduced, at the moment, the air supply temperature is increased, the air return temperature is also increased, the temperature difference of the air supply and the air return is not changed, the rotating speed of the indoor fan is basically not changed, and the continuous hot air supply condition of the cooling unit is caused. The application is based on the relation of indoor air supply, air return, air quantity and heat exchange quantity of the cooling unit, and the indoor fan is decelerated when the air supply temperature of the unit is high, so that the air quantity exchanging heat with the cooling unit is reduced, on one hand, the air outlet temperature of the unit can be reduced by reducing the rotating speed of the indoor fan, because the air quantity passing through the heat exchanger is reduced under the condition that the surface temperature of the heat exchanger in the unit is unchanged (namely the heat exchange quantity is fixed), the heat outlet temperature of the heat exchanger can be reduced, and on the other hand, the rotating speed of the indoor fan is reduced, the quantity of hot air fed into a machine room can be reduced, and the risk of low high temperature of the machine room is prevented.
Referring to fig. 1, an embodiment of the present application discloses a cooling unit, which may be a direct expansion refrigeration unit or a chilled water refrigeration unit, and generally includes a cooling assembly, an indoor fan, and a controller, for example, a machine room, where the cooling assembly is used to provide a cooling medium, and at least part of the cooling assembly is installed in a room (for example, the machine room), and the indoor fan is installed in the room and cooperates with a portion of the cooling assembly installed in the room, so as to form a structure, for example, an indoor unit of an air conditioner. The controller is connected with the indoor fan and the cooling component respectively and is used for controlling the work of the indoor fan and the cooling component. When cooling down to indoor, can work respectively through the cooling module of controller control and indoor fan to provide the lower coolant of temperature through the cooling module, and make the indoor air circulation flow through the air conditioner indoor set through indoor fan, so that indoor air can carry out heat exchange with coolant, and then realize cooling down to indoor. When the indoor fan works, air flowing into the indoor unit of the air conditioner can be called indoor return air, and air flowing out of the indoor unit of the air conditioner can be called indoor air supply.
Illustratively, the direct expansion refrigeration unit generally includes a compressor, a condenser, an evaporator, a throttling device, an indoor fan, a controller and other devices, the throttling device may be an electronic expansion valve, the compressor, the condenser, the evaporator and the throttling device are connected through pipelines to form a cooling assembly, the compressor and the condenser are generally installed outdoors and may form an air conditioning outdoor unit, the evaporator, the throttling device and the indoor fan are generally installed indoors and may form an air conditioning indoor unit. The controller is respectively connected with the indoor fan, the compressor and the throttling device and is used for controlling the indoor fan, the compressor and the throttling device to work. When refrigerating, the condenser can make the gaseous refrigerant become liquid refrigerant after releasing heat and flow into the evaporator after being throttled by the throttling device, meanwhile, the indoor fan is controlled to operate, so that the indoor air circularly flows through the evaporator, and the refrigerant in the evaporator and the indoor air exchange heat, at the moment, the air which flows into the air conditioner from the indoor is released heat, the temperature of the air which flows into the air conditioner from the indoor is reduced, and then flows out of the air conditioner to the indoor, so that the indoor cooling is realized, the heat absorption temperature of the refrigerant in the evaporator is increased and changed into the gaseous refrigerant, and the gaseous refrigerant flows into the condenser after being compressed by the compressor through the compressor.
The chilled water refrigerating unit generally comprises a water coil, a water pump, an indoor fan, a cooling water supply device and the like, wherein the cooling water supply device, the water pump and the water coil are connected through pipelines to form a cooling assembly, the cooling water supply device and the water pump are generally arranged outdoors, and the water coil and the indoor fan are generally arranged indoors and can form an air conditioner indoor unit. The controller is connected with the indoor fan and the water pump respectively and is used for controlling the work of the water pump and the indoor fan. When refrigerating, the water pump can be controlled to start, so that the cooling water supply device supplies cooling water to the water coil, meanwhile, the indoor fan is controlled to operate, so that indoor air circularly flows through the water coil, and the cooling water in the water coil and indoor air exchange heat.
The controller is further used for determining whether the cooling unit is in normal operation or not in the process of cooling the indoor, obtaining the rotating speed requirement of the indoor fan based on the temperature difference of indoor air supply and air return when the cooling unit is in the normal operation state, obtaining the rotating speed requirement of the indoor fan based on the indoor air supply temperature when the cooling unit is in the abnormal operation state, and linearly adjusting the rotating speed of the indoor fan based on the rotating speed requirement of the indoor fan, wherein the rotating speed requirement of the indoor fan is larger, and the rotating speed of the indoor fan is controlled to be faster.
Illustratively, when the indoor fan rotational speed demand H is 0% < H <100%, the ratio V of the actual rotational speed of the indoor fan to the rated maximum rotational speed is controlled to be 20% < V <100%, for example, when the indoor fan rotational speed demand H is h=50%, the ratio V of the actual rotational speed of the indoor fan to the rated maximum rotational speed is 60%, when the indoor fan rotational speed demand H is 0% or less, the ratio V of the actual rotational speed of the indoor fan to the rated maximum rotational speed is controlled to be 20%, and when the indoor fan rotational speed demand H is 100% or less, the ratio V of the actual rotational speed of the indoor fan to the rated maximum rotational speed is controlled to be 100%.
In some embodiments, when the rotational speed requirement of the indoor fan is obtained based on the temperature difference between the indoor air supply and the indoor air return, the rotational speed requirement H of the indoor fan can be calculated by the formula h= (W1-W2)/W3 x 100%, where W1 is the temperature difference between the indoor actual air supply and the indoor air return, W2 is the temperature difference between the indoor target air supply and the indoor air return, W3 is the sensitivity, the temperature difference between the indoor target air supply and the indoor air return can be set according to the actual use environment, and the sensitivity is the range that allows the temperature difference to float, and can also be set according to the actual use environment. For example, if the target temperature difference between the indoor supply air and the return air is 12K, the sensitivity is 3, and the actual temperature difference between the indoor supply air and the return air is 13K, the indoor fan rotation speed requirement H is h= (13-12)/3×100% = 33%.
In other embodiments, when the rotational speed requirement of the indoor fan is obtained based on the indoor air supply temperature difference, the rotational speed requirement H of the indoor fan may be calculated by the formula h= (T2-T1)/T3 x 100%, where T1 is an indoor actual air supply temperature, T2 is an indoor target air supply temperature, and T3 is a sensitivity, where the indoor target air supply temperature may be set according to an actual use environment, and the sensitivity may be a range that allows the target air supply temperature to float, or may be set according to an actual use environment. For example, if the indoor target supply air temperature is 25 ℃, the sensitivity is 3, and the indoor actual supply air temperature is 28 ℃, then the indoor fan speed requirement H is h= (25-28)/3 x 100% = -100%.
When the cooling unit normally operates, the rotating speed requirement of the indoor fan can be obtained based on the temperature difference of indoor air supply and air return, and then the rotating speed of the indoor fan is linearly adjusted based on the obtained rotating speed requirement of the indoor fan, so that the air supply of the cooling unit can be ensured to meet the air flow requirement of the machine room by controlling the temperature difference of the indoor air supply and the air return of the machine room within a target range, the indoor temperature is kept within a preset temperature range, and further the normal operation of other electronic equipment in the machine room is ensured.
When the cooling unit is abnormal, for the direct expansion refrigerating system, when faults such as power cut and the like occur, the cooling unit is restarted, the rotating speed requirement of the indoor fan can be obtained based on the indoor air supply temperature, and then the rotating speed of the indoor fan is linearly regulated based on the obtained rotating speed requirement of the indoor fan, namely, after the unit detects the power cut faults, the indoor fan is switched into air supply temperature control, the rotating speed of the indoor fan is lower when the air supply temperature is higher, and when the indoor air supply temperature reaches an air supply temperature early warning value, the indoor fan operates to stand by rotating speed. For the chilled water refrigerating unit, when water valve faults and the like occur, the rotating speed requirement of the indoor fan can be obtained based on the indoor air supply temperature, and then the rotating speed of the indoor fan is linearly adjusted based on the obtained rotating speed requirement of the indoor fan, namely, after the unit detects the water valve faults and the like, the indoor fan is switched to air supply temperature control, the rotating speed of the indoor fan is lower when the air supply temperature is higher, and when the indoor air supply temperature reaches an air supply temperature early warning value, the indoor fan operates at a standby rotating speed.
In some embodiments, an anomaly of the cooling unit may be determined by detecting an air supply temperature of the indoor fan. For example, when the actual air supply temperature of the unit is detected to be greater than the preset air supply temperature, it may be determined that the cooling unit is in an abnormal state, and when the actual air supply temperature of the unit is detected to be less than or equal to the preset air supply temperature, it may be determined that the cooling unit is in a normal operation state. When the cooling unit is abnormal and the rotating speed of the indoor fan is required to be less than 0%, the lower limit rotating speed of the indoor fan is controlled to ensure that the cooling unit can not send hot air to the machine room.
In other embodiments, anomalies in the cooling unit may also be determined by detecting operating parameters of various components of the cooling unit. By way of example, whether the cooling unit is in an abnormal operation state can be determined by detecting the operation power, voltage, current or related parameters of the electronic expansion valve of the compressor, or a difference value between the software issued opening of the water valve and the feedback actual opening is compared with an absolute value, and whether the cooling unit is abnormal or not is judged based on a comparison result, for example, when |q1-q2|is not less than or equal to Q3 is detected, a water valve fault, namely, abnormal operation of the cooling unit is judged, wherein Q1 is the opening of the water valve issued by the software, Q2 is the actual opening fed back by the water valve, and Q3 is a set value.
In the process of running the lower limit rotating speed of the indoor fan, if the controller detects that the cooling unit is recovered to normal operation, the refrigerating capacity of the cooling unit is determined to be recovered to normal operation, at the moment, the rotating speed requirement of the indoor fan can be obtained based on the temperature difference of indoor air supply and air return, and then the rotating speed of the indoor fan is linearly regulated based on the obtained rotating speed requirement of the indoor fan, so that the normal operation mode is recovered. The determination of whether the cooling unit resumes normal operation may be determined by determining whether the opening time of the compressor reaches a preset time, or by determining whether the opening time of the electronic expansion valve reaches a preset time.
In the practical application scene, when the controller detects that the compressor is stopped or the electronic expansion valve is closed or the water valve fails, the controller controls the running standby rotating speed of the indoor fan instead of regulating the running rotating speed of the indoor fan based on the temperature difference of the air supply and the air return, when the controller detects that the compressor is restarted or the electronic expansion valve is opened, the rotating speed of the indoor fan is controlled by the air supply temperature and gradually increased, when the rotating speed of the indoor fan is increased to the rotating speed before the compressor is stopped or before the electronic expansion valve is closed, or after the compressor or the electronic expansion valve is opened for a preset time, the rotating speed of the indoor fan is controlled by the temperature difference of the air supply and the air return, or when the water valve fails to alarm and eliminate, the refrigerating capacity of the cooling unit is recovered to be normal, and then the control mode of the indoor fan is automatically switched to the indoor air supply temperature control to recover the normal running mode.
Referring to fig. 2, based on the above embodiment, the embodiment of the present application further discloses an air outlet control method of a cooling unit, where the air outlet control method may apply the cooling unit described in the above embodiment, and the air outlet control method includes the steps of:
s11, determining whether the cooling unit normally operates.
Specifically, whether the air supply temperature of the indoor fan is higher than a preset temperature is detected, when the air supply temperature of the indoor fan is higher than the preset temperature, the cooling unit is determined to be in an abnormal state, and when the air supply temperature of the indoor fan is lower than or equal to the preset temperature, the cooling unit is determined to be in a normal running state. The preset temperature may be set according to actual environmental requirements, for example, may be set to 15 ℃, 20 ℃, 25 ℃, etc.
In other embodiments, anomalies in the cooling unit may also be determined by detecting operating parameters of various components of the cooling unit. By way of example, whether the cooling unit is in an abnormal operation state can be determined by detecting the operation power, voltage, current or related parameters of the electronic expansion valve of the compressor, or a difference value between the software issued opening of the water valve and the feedback actual opening is compared with an absolute value, and whether the cooling unit is abnormal or not is judged based on a comparison result, for example, when |q1-q2|is not less than or equal to Q3 is detected, a water valve fault, namely, abnormal operation of the cooling unit is judged, wherein Q1 is the opening of the water valve issued by the software, Q2 is the actual opening fed back by the water valve, and Q3 is a set value.
S12, acquiring the rotating speed requirement of the indoor fan based on the temperature difference of indoor air supply and air return when the cooling unit is in the normal running state, and acquiring the rotating speed requirement of the indoor fan based on the indoor air supply temperature when the cooling unit is in the abnormal running state.
Specifically, when the rotational speed requirement of the indoor fan is obtained based on the temperature difference between the indoor air supply and the indoor air return, the rotational speed requirement of the indoor fan can be calculated by the formula h= (W1-W2)/W3 x 100%, wherein W1 is the temperature difference between the indoor actual air supply and the indoor air return, W2 is the temperature difference between the indoor target air supply and the indoor air return, and W3 is the sensitivity.
When the rotational speed requirement of the indoor fan is obtained based on the indoor air supply temperature, the rotational speed requirement of the indoor fan can be calculated by the formula h= (T2-T1)/T3 by 100%, wherein T1 is the indoor actual air supply temperature, T2 is the indoor target air supply temperature, and T3 is the sensitivity.
S13, the rotating speed of the indoor fan is linearly adjusted based on the rotating speed requirement of the indoor fan.
Specifically, the higher the rotational speed demand of the indoor fan, the faster the rotational speed of the indoor fan is controlled.
In practical application, when the cooling unit normally operates, the rotating speed requirement of the indoor fan is obtained based on the temperature difference of indoor air supply and air return, and then the rotating speed of the indoor fan is linearly adjusted based on the obtained rotating speed requirement of the indoor fan. When the cooling unit is abnormal, the rotating speed requirement of the indoor fan is obtained based on the indoor air supply temperature, and then the rotating speed of the indoor fan is adjusted linearly based on the obtained rotating speed requirement of the indoor fan.
Illustratively, when the rotational speed requirement H of the indoor fan is 0% < H <100%, the ratio V of the actual rotational speed of the indoor fan to the rated maximum rotational speed is controlled to be 20% < V <100%, when the rotational speed requirement H of the indoor fan is less than or equal to 0%, the ratio V of the actual rotational speed of the indoor fan to the rated maximum rotational speed is controlled to be 20%, and when the rotational speed requirement H of the indoor fan is 100% < H, the ratio V of the actual rotational speed of the indoor fan to the rated maximum rotational speed is controlled to be 100%.
When the cooling unit is in normal operation, the rotating speed of the indoor fan can be controlled based on the temperature difference of indoor air supply and air return, so that the air supply of the cooling unit can be ensured to meet the indoor air flow requirement, the indoor temperature is kept within a preset temperature range, and further, the normal operation of other indoor electronic equipment is ensured.
The present application is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present application are intended to be included in the scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.
Claims (10)
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| Application Number | Priority Date | Filing Date | Title |
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| CN202411950606.1A CN119835911A (en) | 2024-12-26 | 2024-12-26 | Air outlet control method of cooling unit and cooling unit |
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| CN202411950606.1A CN119835911A (en) | 2024-12-26 | 2024-12-26 | Air outlet control method of cooling unit and cooling unit |
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| CN119835911A true CN119835911A (en) | 2025-04-15 |
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| CN202411950606.1A Pending CN119835911A (en) | 2024-12-26 | 2024-12-26 | Air outlet control method of cooling unit and cooling unit |
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| Country | Link |
|---|---|
| CN (1) | CN119835911A (en) |
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- 2024-12-26 CN CN202411950606.1A patent/CN119835911A/en active Pending
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