Bidirectional airflow fungal spore release intensity test device

Abstract

The present invention discloses a bidirectional airflow fungal spore release strength test device, which belongs to the field of spore release test devices, and solves the problem in the prior art that there is a lack of a bidirectional airflow fungal spore release strength test device that can test the fungal spore release strength in different flushing modes of parallel airflow and vertical airflow without destroying the tested material, and is easy to use. It mainly includes a casing, a blowing device and a controller are provided on the casing, the controller is connected to an operation display screen, the blowing device is connected to a filter II, the filter II is connected to a solenoid valve, the two air outlets of the solenoid valve are respectively connected to the vertical air outlet and the parallel air outlet through an air duct, an air duct is provided in the casing, the air duct is connected to a sampling chamber, the sampling chamber is connected to a filter I, the air outlet of the filter I1 is communicated with the outside world, and a flowmeter I is provided on the air duct on one side of the sampling chamber. The present invention is mainly used for fungal spore release strength testing.

Description

Technical Field

[0001] The invention relates to a spore release testing device, in particular to a bidirectional airflow fungal spore release intensity testing device. Background Art

[0002] Fungal spores attached to the wall are easily entrained by the airflow to form aerosols that diffuse in the house, reducing air quality and endangering human health. Fungal spores growing on indoor walls or air-conditioning systems are stimulated by airflow, and fungi growing on the surface of these devices are released under the action of parallel and vertical airflows, entering the air to form bioaerosols. Under the action of parallel airflow, the spores are in the boundary layer where the airflow is close to the surface of the material. At this time, the force on the spores is mainly the airflow force, which is much smaller than the inertial force of the airflow during air jet. Under the impact of the jet, more spores will be released. Therefore, it is necessary to consider the effect of air jet on the release of fungal spores, and it should be ensured that it is carried out without destroying the sample to be tested.

[0003] The invention patent "Parallel airflow fungal spore release intensity test method and device" (authorization announcement number CN101314758B) discloses a device and method for measuring the parallel airflow fungal spore release intensity on different material surfaces in an air conditioning system. However, there are the following problems: the air outlet uses parallel airflow to release spores, but the effect of vertical airflow on spore release is not considered; the sample to be tested is destroyed and a part is taken out and placed in the instrument for testing. If the wall is tested, the object to be tested needs to be destroyed. The above technical scheme does not consider the effect of different flushing directions (air jet and parallel airflow) on the release of fungal spores, and the situation where it is inconvenient to perform local sampling of the object to be tested.

[0004] Currently, there is a lack of an easy-to-use bidirectional airflow fungal spore release intensity testing device that can test the fungal spore release intensity under different flushing modes of parallel airflow and vertical airflow without destroying the tested material. Summary of the invention

[0005] The purpose of the present invention is to provide a bidirectional airflow fungal spore release strength testing device to solve the problem in the prior art that there is a lack of a bidirectional airflow fungal spore release strength testing device that can test the fungal spore release strength under different flushing modes of parallel airflow and vertical airflow without damaging the tested material and is easy to use.

[0006] The present invention is achieved through the following technical solutions:

[0007] A two-way airflow fungal spore release intensity testing device comprises a casing, a blowing device and a controller are arranged on the casing, the controller is connected to an operation display screen, the blowing device is connected to a filter II, the filter II is connected to a solenoid valve, two air outlets of the solenoid valve are respectively connected to a vertical air outlet and a parallel air outlet through air ducts, an air duct is arranged in the casing, the air duct is connected to a sampling chamber, the sampling chamber is connected to a filter I, the air outlet of the filter I1 is communicated with the outside, a flowmeter I is arranged on the air duct on one side of the sampling chamber, a flowmeter II is arranged on the air duct between the filter II and the solenoid valve, the sampling chamber is connected to a detection device, and the controller is respectively connected to the blowing device, the solenoid valve, the flowmeter I and the flowmeter II.

[0008] Furthermore, the blowing device includes a blower and a handle, the blower outlet is connected to the filter II, and the operation display screen is arranged on the handle.

[0009] Furthermore, the detection device is connected to the sampling chamber via a hose, and a universal locking wheel is provided at the bottom of the detection device.

[0010] Furthermore, a sealing gasket is provided on the casing.

[0011] Furthermore, the detection device is a microbial aerosol real-time monitor or a particle counter.

[0012] Furthermore, the hose is a coiled hose.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. Three different airflow modes are controlled by solenoid valves: vertical airflow, parallel airflow, and vertical and parallel mixed airflow, to test the release intensity of fungal spores under various airflows.

[0015] 2. Handheld sampling, close to the surface of the object to be tested, convenient for measuring the fungal spore content of the object to be tested, without damaging the object to be tested, easy to use.

[0016] 3. A universal locking wheel is provided at the bottom of the microbial aerosol real-time monitor, making it easier to push and fix the microbial aerosol real-time monitor. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural principle diagram of the present invention;

[0018] Figure 2 Schematic diagram of the sealing gasket of the present invention.

[0019] In the figure: 1. Filter I; 2. Sampling chamber; 3. Flowmeter I; 4. Vertical air outlet; 5. Blowing device; 6. Filter II; 7. Hose; 8. Flowmeter II; 9. Parallel air outlet; 10. Detection device; 11. Sealing gasket; 12. Item to be tested; 13. Solenoid valve; 14. Operation display screen; 15. Air duct; 16. Universal locking wheel; 17. Casing; 18. Controller. DETAILED DESCRIPTION

[0020] The present invention will be further described below in conjunction with the accompanying drawings.

[0021] Embodiment 1, a two-way airflow fungal spore release intensity test device, comprising a housing 17, a blowing device 5 and a controller 18 are arranged on the housing 17, the controller 18 is connected to the operation display screen 14, the blowing device 5 is connected to the filter II 6, the filter II 6 is connected to the solenoid valve 13, the two air outlets of the solenoid valve 13 are respectively connected to the vertical air outlet 4 and the parallel air outlet 9 through the air duct, the operation display screen 14 can control the solenoid valve 13 to open the corresponding air outlet, that is, to control the three blowing modes of ventilation of the vertical air outlet 4, ventilation of the parallel air outlet 9, and ventilation of the vertical air outlet 4 and the parallel air outlet 9, the housing 17 is provided with a There is an air duct 15, which is connected to the sampling chamber 2, and the sampling chamber 2 is connected to the filter Ⅰ1. The air outlet of the filter Ⅰ1 is connected to the outside through the air duct, so as to ensure that the gas discharged into the air is clean gas. A flow meter Ⅰ3 is provided on the air duct 15 on one side of the sampling chamber 2, and a flow meter Ⅱ8 is provided on the air duct 15 between the filter Ⅱ6 and the solenoid valve 13. The sampling chamber 2 is connected to the detection device 10, and the controller 18 is respectively connected to the blowing device 5, the solenoid valve 13, the flow meter Ⅰ3 and the flow meter Ⅱ8. The flow measured by the flow meter Ⅰ3 and the flow meter Ⅱ8 is displayed on the operation display screen 14, which is used to calculate the situation of fungal spore aerosol.

[0022] Embodiment 2, a two-way airflow fungal spore release intensity test device, the blowing device 5 includes a fan and a handle, the fan outlet is connected to the filter II 6, and the operation display screen 14 is arranged on the handle; the detection device 10 is connected to the sampling chamber 2 through the hose 7, and a universal locking wheel 16 is arranged at the bottom of the detection device 10; the front end of the housing 17 is provided with a cover, and a sealing gasket 11 is arranged at the contact between the cover and the object to be tested 12; the detection device 10 is a microbial aerosol real-time monitor or a particle counter, and the hose 7 is a winding coil hose, which can be retracted or stretched, and the rest is the same as Embodiment 1.

[0023] The wind speed of the fan can be adjusted through the operation display screen 14. The air flow blown by the fan is filtered by the filter II 6 and then passes through the solenoid valve 13. The on and off of the two air outlets of the solenoid valve 13 is controlled by the operation display screen 14, that is, one of the three blowing modes of ventilation, namely, ventilation through the vertical air outlet 4, ventilation through the parallel air outlet 9, and ventilation through the vertical air outlet 4 and the parallel air outlet 9 is selected. When hand-held sampling, a sealing gasket 11 is provided on the casing 17 outside the air duct 15. The casing 17 is pressed by hand so that the sealing gasket 11 on the cover casing is close to the end face of the object to be tested 12, thereby forming a relatively closed environment for the air duct 15 inside the cover casing at the front end of the casing 17, so that the test can be carried out without destroying the sample to be tested. Each blowing mode blows up and releases the attached fungal spores through the airflow formed by the vertical air outlet 4 and the parallel air outlet 9, and enters the sampling chamber 2 through the air duct 15. The fungal spores entering the sampling chamber 2 enter the microbial aerosol real-time monitor or particle counter through the hose 7 to analyze the content of fungal spores in the obtained aerosol, and calculate the fungal spore release intensity according to formula (1). Finally, the measured gas is discharged after being filtered by the filter Ⅰ1, which is environmentally friendly and pollution-free. The universal locking wheel 16 makes it easier to push and fix the microbial aerosol real-time monitor or particle counter.

[0024]

[0025] Where R is the fungal spore release intensity (cm -2 min -1 )), N1 is the number of spores detected by the microbial aerosol detector, S is the area of ​​the test surface of the object to be tested (cm 2 ), t is the test time (min), Q1 is the sampling flow rate of the microbial aerosol detector (L min -1 ), Q is the air flow rate in the duct (L min -1 ).

Claims

1. A bidirectional airflow fungal spore release intensity testing device, comprising a housing (17), the housing (17) being provided with a blowing device (5) and a controller (18), the controller (18) being connected to an operation display screen (14), characterized in that: The blowing device (5) is connected to a filter II (6), the filter II (6) is connected to a solenoid valve (13), the two air outlets of the solenoid valve (13) are respectively connected to the vertical air outlet (4) and the parallel air outlet (9), an air duct (15) is provided in the housing (17), the air duct (15) is connected to the sampling chamber (2), the sampling chamber (2) is connected to the filter I (1), a flow meter I (3) is provided on the air duct (15) on one side of the sampling chamber (2), a flow meter II (8) is provided on the air duct (15) between the filter II (6) and the solenoid valve (13), the sampling chamber (2) is connected to the detection device (10), and the controller (18) is respectively connected to the blowing device (5), the solenoid valve (13), the flow meter I (3) and the flow meter II (8); the housing (17) is provided with a sealing gasket (11).

2. The bidirectional airflow fungal spore release intensity testing device according to claim 1, characterized in that: The blowing device (5) comprises a blower and a handle, the blower outlet is connected to the filter II (6), and the operation display screen (14) is arranged on the handle.

3. The bidirectional airflow fungal spore release intensity testing device according to claim 1, characterized in that: The detection device (10) is connected to the sampling chamber (2) via a hose (7), and a universal locking wheel (16) is provided at the bottom of the detection device (10).

4. The bidirectional airflow fungal spore release intensity testing device according to claim 1 or 3, characterized in that: The detection device (10) is a microbial aerosol real-time monitor or a particle counter.

5. The bidirectional airflow fungal spore release intensity testing device according to claim 3, characterized in that: The hose (7) is a coiled hose.

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