CN201133890Y - A system for cigarette smoke aerosol detection - Google Patents

Abstract

The utility model discloses a cigarette smoke aerosol detection system, which comprises a cigarette smoke generator, 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 compression Air inlet with its pressure regulator and axial diluter. The utility model realizes the detection of the cigarette smoke aerosol by improving the gas path connection design between the smoke generating device and the aerosol detection equipment, and more accurately analyzes the condition of the smoke aerosol.

Description

A system for cigarette smoke aerosol detection

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:

Provided is a system for cigarette smoke aerosol detection, 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 clean compressed air Air inlet and its pressure regulating device and axial diluter.

The waste discharge device is an adjustable speed suction source; it may also be a flow meter, a pressure regulating valve and a suction source device; it may also directly use a pressure regulating valve and a suction source.

The pressure regulating device of the dilution device is a pressure regulating valve, and may also be a pressure regulating valve and a flow meter.

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. Through the dilution device, 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 flue gas generating device and the aerosol detection equipment, adding an auxiliary gas dilution device and a waste discharge device, and setting a suitable air flow speed, etc., to ensure the collection of flue gas. When the sol sample is burned and smoked, it meets the requirements, and the concentration of the sample entering the detector is within the effective detection range of the equipment.

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 dilution device. The dilution device includes a clean compressed air inlet pipe, a pressure regulating valve, a flow meter and an axial diluter. The pressure regulating valve and the flow meter adjust the flow rate of the clean compressed air (level 2 or above) Control the flow rate of the sample flow 3 so that the flow rate of the sample flow 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 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.

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 dilution device, which includes a clean compressed air inlet pipe, a pressure regulating valve and an axial diluter, and the pressure regulating valve adjusts the flow rate of clean compressed air (standard of grade 2 or above) to control the air flow of the sample flow 3 Speed, so that the flow rate of the sample flow 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 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 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, 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, by adjusting the working efficiency, ensure that the gas flow rate of sample flow 1 meets the requirements in the range of 1mL/min～1.8mL/min, and the gas flow rate of sample flow 2 is 1/8～1/3 of sample flow 1. The sample flow 2 passes through the dilution device, which includes a clean compressed air inlet pipe, a pressure regulating valve and an axial diluter, and the pressure regulating valve adjusts the flow rate of clean compressed air (standard of grade 2 or above) to control the air flow of the sample flow 3 Speed, so that the flow rate of the sample flow 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.

Claims (6)

1, a kind of system that is used for the cigarette flue gas aerosol detection is characterized in that comprising the cigarette smoke generating means, T-valve, waste discharge device, air mix facilities and the gasoloid detector that connect successively by gas pipeline; Described air mix facilities comprises clean compressed air air intake opening and regulator and axial diluter.

2, according to the described system that is used for the cigarette flue gas aerosol detection of claim 1, it is characterized in that described waste discharge device is the adjustable speed suction source.

3, according to the described system that is used for the cigarette flue gas aerosol detection of claim 1, it is characterized in that described waste discharge device is flowmeter, pressure regulator valve and suction source.

4, according to the described system that is used for the cigarette flue gas aerosol detection of claim 1, it is characterized in that described waste discharge device is pressure regulator valve and suction source.

5, according to the described system that is used for the cigarette flue gas aerosol detection of claim 1, it is characterized in that described regulator is a pressure regulator valve.

6, according to the described system that is used for the cigarette flue gas aerosol detection of claim 1, it is characterized in that described regulator is pressure regulator valve and flowmeter.

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