CN201166634Y - A cigarette smoke aerosol detection system - Google Patents

Abstract

The utility model discloses a detecting system of cigarette smoke gas dispersoid, which comprises a cigarette smoke generating arrangement, a cross valve, an exhaust device, a dilution apparatus and a gas dispersoid detecting instrument which are order connected with a gas pipe, wherein the dilution apparatus is a two-stage dilution apparatus, the first-stage dilution apparatus comprises a clean compression air inlet and a pressure regulating device thereof, and an axial diluter, and the second-stage dilution apparatus comprises a clean compression air inlet, a pressure regulating device thereof, and a DekatiDiluter diluter. The detecting system realizes the detection of the cigarette smoke gas dispersoid through improving the connection design of the pipeline between the cigarette smoke generating arrangement and the gas dispersoid detecting instrument, and the detecting system can carry out a more accurate analysis of the condition of the cigarette smoke gas dispersoid.

Description

A cigarette smoke aerosol detection system

technical field

The utility model belongs to the technical field of detection, in particular to a detection system for cigarette smoke aerosol.

Background technique

In the prior art, the process of aerosol detectors used to measure aerosol particles in the air is: through the suction source device of the detector itself, usually with a stable flow rate of 10L/min-40L/min, the gas sample is sucked outward; when the sample When the concentration is high, an axial diluter can also be connected to dilute the sample.

When an aerosol detector is used to measure cigarette smoke, the detector is seriously overloaded because the aerosol concentration in the smoke is much higher than that in the air. When the detection results exceeded the detection limit of the instrument (4.0×10 ⁵ fA), there was no difference between the detection values, and all reached the maximum value, etc., the detection and analysis could not be carried out. Even if the sample dilution device provided by the manufacturer is used, it still cannot meet the requirements for samples with high tar content; for the detection of low-tar cigarette samples, pipeline blockage often occurs, and the pressure drop in the pipeline increases during the detection process. The gas flow rate changes drastically during the suction process, resulting in inconsistencies between the captured samples before and after.

In the cigarette smoke aerosol detection technology, there is a lack of a stable, adjustable gas flow rate and concentration adjustment system, so that the existing aerosol detector cannot be used to detect the aerosol content in cigarette smoke.

Utility model content

The purpose of the utility model is to fill up the gap in the prior art and provide a detection system for cigarette smoke aerosol.

The purpose of this utility model is achieved by the following technical solutions:

A cigarette smoke aerosol detection system is provided, comprising a cigarette smoke generating device, a three-way valve, a waste discharge device, a dilution device and an aerosol detector sequentially connected through a gas pipeline; the dilution device is a two-stage dilution device, the first The primary dilution device includes clean compressed air inlet and its pressure regulating device and axial diluter, and the second stage dilution device includes clean compressed air inlet and its pressure regulating device and Dekati Diluter diluter.

The waste discharge device is an adjustable speed suction source or a flow meter, a pressure regulating valve and a suction source or a pressure regulating valve and a suction source.

The pressure regulating device of the dilution device is a pressure regulating valve or a pressure regulating valve and a flow meter.

The dilution ratio of the Dekati Diluter diluter is 20:1-100:1.

The sample air flow flowing into the aerosol detector, referred to as the sample flow 3, is limited by the existing conventional aerosol detector, and is usually a fixed value that cannot be adjusted. The value is generally 10L/min-40L/min.

The smoke generating device can be configured as a smoking machine and a solenoid valve. The flow rate of the airflow (sample flow 1) flowing out of the smoke generating device must be set in accordance with the requirements of cigarette testing and cannot be adjusted arbitrarily. According to different testing requirements, its value is between 1mL/min and 1.8mL/min. The solenoid valve can communicate with the ambient air, and it is set according to the cigarette detection requirements. Usually, it is connected to the smoking machine for smoking cigarettes for 2 seconds, and switched to sucking ambient air for 58 seconds, and it is repeated until the cigarette smoking is completed.

Through the setting of the waste discharge device, the working efficiency of the suction source is required to be 1mL/min~2mL/min, and a pressure regulating valve or a pressure regulating valve and a flow meter are set at the same time to ensure that the gas flow rate of the sample stream 1 meets the requirements of 1mL/min~1.8mL/min. The min range requires that sample flow 2 be 1/8 to 1/3 of the flow rate of sample flow 1.

When the tar content of cigarette smoke is high and a large dilution ratio is required, the gas in the axial diluter may flow back to the sample flow 2 pipe due to the rapid pressure drop, which may affect the detection results. The utility model solves this problem through the second stage dilution device. Through two-stage dilution, adjust the flow rate of clean compressed air (level 2 or above) to control the flow rate of sample flow 3, so that the flow rate of sample flow 3 is 10L/min-40L/min.

The beneficial effects of the utility model are: by improving the design of the gas path connection between the smoke generating device and the aerosol detection equipment, adding two-stage auxiliary gas dilution devices and waste discharge devices, and setting appropriate airflow speeds, etc., to ensure the collection of smoke When the aerosol sample is smoked, the cigarette smoking meets the requirements, and the concentration of the sample entering the detector is within the effective detection range of the device.

The utility model realizes the detection of the aerosol of the cigarette smoke, and does not need to develop special aerosol detection equipment for the detection of the cigarette smoke. The detection effect is significantly improved, and a more accurate analysis of the smoke aerosol is realized.

Description of drawings

Figure 1 Effect diagram of aerosol detector instrument detecting overload

Figure 2 The detection results of directly using the aerosol detector to detect the aerosol content of cigarette smoke

Fig. 3 schematic diagram of system structure of the utility model 1

Fig. 4 schematic diagram of system structure of the utility model 2

Fig. 5 schematic diagram of system structure of the utility model 3

Fig. 6 The utility model detects the detection result of cigarette smoke aerosol content

Detailed ways

Further illustrate the utility model below in conjunction with accompanying drawing and specific embodiment.

Example 1

Select cigarette samples to produce smoke through the smoking machine, and use the existing aerosol detector to directly measure the aerosol content of the cigarette smoke flowing out of the smoking machine. The suction source device of the detector itself usually has a stable flow rate of 10L/min ~40L/min, the gas sample is sucked outward, but because the aerosol concentration in the flue gas is much higher than that in the air, the detector is seriously overloaded. The detection results exceeded the detection limit of the instrument (4.0×10 ⁵ fA), and there was no difference between the detection values, and all reached the maximum value. The results are shown in Figure 1, and detection and analysis cannot be performed.

If the axial diluter provided by the manufacturer of the aerosol detector is used to dilute the cigarette smoke and then carry out aerosol detection, the pipeline is still often blocked, the pressure drop of the pipeline is getting larger and larger, and the air velocity is violent during the cigarette smoking process. Changes, resulting in inconsistencies in the samples captured before and after, the measurement results are shown in Figure 2.

Example 2

A cigarette smoke aerosol detection system, comprising a cigarette smoke generating device, a three-way valve, a waste discharge device, a dilution device and an aerosol detector sequentially connected through a gas pipeline; the dilution device includes a clean compressed air inlet and Its pressure regulating device and axial diluter.

As shown in Figure 3, the smoke generating device can be configured as a smoking machine and a solenoid valve. The flow rate of the airflow (sample flow 1) flowing out of the smoke generating device must be set in accordance with the requirements of cigarette testing, and its value should be 1mL/min to 1.8mL/min according to different testing requirements. The solenoid valve can communicate with the ambient air, and it is set according to the cigarette detection requirements. Usually, it is connected to the smoking machine for smoking cigarettes for 2 seconds, and switched to sucking ambient air for 58 seconds, and it is repeated until the cigarette smoking is completed.

The sample stream 1 flows through the three-way valve, one outlet of the three-way valve is connected to the flue gas pipeline to be tested, and the other outlet is connected to a waste discharge device. The waste discharge device includes a flowmeter, a pressure regulating valve and an external suction source. The flowmeter and The pressure regulating valve is connected with each other, and the pressure regulating valve is connected with an external suction source device. The working efficiency of the suction source is required to be 1mL/min~2mL/min, and a pressure regulating valve and a flow meter are set at the same time to ensure that the gas flow rate of the sample flow 1 meets the requirements in the range of 1mL/min~1.8mL/min, and the sample flow 2 is the sample flow 1 1/8 to 1/3 of the gas flow rate. The sample flow 2 passes through the first stage dilution device, the first stage dilution device includes a clean compressed air intake pipe, a pressure regulating valve, a flow meter and an axial diluter, and the pressure regulating valve and flow meter adjust the clean compressed air (2-stage or 2-stage The flow rate of the above standard) controls the flow rate of the sample stream 4, effectively preventing the backflow of the sample stream 2; the sample stream 4 enters the Dekati Diluter diluter, and the clean compressed air enters the Dekati Diluter diluter through a pressure regulating valve and a flow meter to adjust the flow rate , Dekati Diluter diluter dilution ratio is 20:1 ~ 100:1, to ensure that the flow rate of sample flow 3 is 10L/min ~ 40L/min. The sample flow 3 enters the aerosol detector for smoke aerosol detection, and the detection results are shown in Figure 6.

Example 3

As shown in Figure 4, the smoke generating device can be configured as a smoking machine and a solenoid valve. The flow rate of the airflow (sample flow 1) flowing out of the smoke generating device must be set in accordance with the requirements of cigarette testing, and its value should be 1mL/min to 1.8mL/min according to different testing requirements. The solenoid valve is set according to the cigarette detection requirements, usually open for 2s and closed for 58s, and repeat until the cigarette is smoked.

Sample flow 1 flows through the three-way valve, one outlet of the three-way valve is connected to the flue gas pipeline to be tested, and the other outlet is connected to a waste discharge device, the waste discharge device includes a pressure regulating valve and an external suction source, the three-way valve is connected to a pressure regulating The valves are connected, and the pressure regulating valve is connected with an external suction source device. The working efficiency of the suction source is required to be 1mL/min~2mL/min, and a pressure regulating valve is set at the same time to ensure that the gas flow rate of sample flow 1 meets the requirements in the range of 1mL/min~1.8mL/min, and sample flow 2 is the gas flow rate of sample flow 1. 1/8～1/3. The sample flow 2 passes through the first stage dilution device, the first stage dilution device includes a clean compressed air intake pipe, a pressure regulating valve, a flow meter and an axial diluter, and the pressure regulating valve and flow meter adjust the clean compressed air (2-stage or 2-stage The flow rate of the above standard) controls the flow rate of the sample stream 4, effectively preventing the backflow of the sample stream 2; the sample stream 4 enters the Dekati Diluter diluter, and the clean compressed air enters the Dekati Diluter diluter through a pressure regulating valve and a flow meter to adjust the flow rate. The dilution ratio of the Dekati Diluter diluter is 20:1~100:1, and the flow rate of the sample stream 3 is guaranteed to be 10L/min~40L/min. The sample flow 3 enters the aerosol detector for smoke aerosol detection, and the detection results are shown in Figure 6.

Example 4

As shown in Figure 5, the smoke generating device can be configured as a smoking machine and a solenoid valve. The flow rate of the airflow (sample flow 1) flowing out of the smoke generating device must be set in accordance with the requirements of cigarette testing, and its value should be 1mL/min to 1.8mL/min according to different testing requirements. The solenoid valve is set according to the cigarette detection requirements, usually open for 2s and closed for 58s, and repeat until the cigarette is smoked.

The sample stream 1 flows through the three-way valve, one outlet of the three-way valve is connected to the flue gas pipeline to be tested, and the other outlet is connected to a waste discharge device, which is an adjustable speed plus a suction source, and the working efficiency of the suction source is required to be 1mL /min～2mL/min, ensure that the gas flow rate of sample flow 1 meets the requirements in the range of 1mL/min～1.8mL/min, and sample flow 2 is 1/8～1/3 of the gas flow rate of sample flow 1. The sample flow 2 passes through the first stage dilution device, the first stage dilution device includes a clean compressed air intake pipe, a pressure regulating valve, a flow meter and an axial diluter, and the pressure regulating valve and flow meter adjust the clean compressed air (2-stage or 2-stage The flow rate of the above standard) controls the flow rate of the sample stream 4, effectively preventing the backflow of the sample stream 2; the sample stream 4 enters the Dekati Diluter diluter, and the clean compressed air enters the Dekati Diluter diluter through a pressure regulating valve and a flow meter to adjust the flow rate. The dilution ratio of the Dekati Diluter diluter is 20:1~100:1, and the flow rate of the sample stream 3 is guaranteed to be 10L/min~40L/min. The sample flow 3 enters the aerosol detector for smoke aerosol detection, and the detection results are shown in Figure 6.

Claims (7)

1. A cigarette smoke aerosol detection system, characterized in that it includes a cigarette smoke generating device, a three-way valve, a waste discharge device, a dilution device and an aerosol detector connected in sequence through a gas pipeline; the dilution device is a two-stage Dilution device, the first stage dilution device includes clean compressed air inlet and its pressure regulating device and axial diluter, the second stage dilution device includes clean compressed air inlet and its pressure regulating device and Dekati Diluter diluter. 2. The cigarette smoke aerosol detection system according to claim 1, characterized in that the exhaust device is an adjustable-speed suction source. 3. The cigarette smoke aerosol detection system according to claim 1, wherein the waste discharge device is a flow meter, a pressure regulating valve and a suction source. 4. The cigarette smoke aerosol detection system according to claim 1, wherein the waste discharge device is a pressure regulating valve and a suction source. 5. The cigarette smoke aerosol detection system according to claim 1, characterized in that the pressure regulating device of the dilution device is a pressure regulating valve. 6. The cigarette smoke aerosol detection system according to claim 1, characterized in that the pressure regulating device of the dilution device is a pressure regulating valve and a flow meter. 7. The cigarette smoke aerosol detection system according to claim 1, characterized in that the dilution ratio of the Dekati Diluter is 20:1-100:1.

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