Method and apparatus for detecting gas exchange and filtration in a closed environment

Abstract

The application discloses a detection method and device for gas exchange and filtration in a closed environment, wherein the device comprises a cover body and an air extraction module; the cover body is a double-layer structure comprising a waste gas layer and a new gas layer, the waste gas layer and the new gas layer are mutually separated, a plurality of one-way valve mounting portions are arranged on a separation surface, and a one-way valve is arranged at each one-way valve mounting portion; a waste gas generating device is arranged in the waste gas layer, a plurality of detector mounting portions are arranged in the waste gas layer and / or the new gas layer, and a gas molecule detector is arranged at each detector mounting portion; a plurality of air outlet holes are arranged on the outer surface of the waste gas layer of the cover body, and a plurality of air inlet holes are arranged on the outer surface of the new gas layer; a device to be detected is arranged in the air extraction module, and the air extraction module is in sealed connection with the air inlet holes and the air outlet holes respectively; the air extraction module is used for extracting the gas in the waste gas layer, and the gas enters the new gas layer after passing through the device to be detected.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of performance detection, in particular to a detection method and device for gas exchange and filtration in a closed environment. BACKGROUND

[0002] At present, in order to ensure the safety of workers in special environments, gas exchange and filtration devices such as gas exchange membranes and gas filtration purifiers are often used. However, the performance of the gas exchange and filtration devices is difficult to determine, and if unqualified products enter the market, it may seriously endanger the safety of relevant personnel. SUMMARY

[0003] To solve the problems raised in the background art, the purpose of the present application is to provide a detection device for gas exchange and filtration in a closed environment, comprising a cover body and an air extraction module.

[0004] The cover body is a double-layer structure comprising a waste gas layer and a fresh gas layer, the waste gas layer and the fresh gas layer are mutually separated, and a plurality of one-way valve mounting portions are provided on the separation surface, a one-way valve is provided at each one-way valve mounting portion, and the one-way valve is used to allow the gas in the fresh gas layer to enter the waste gas layer, while the gas in the waste gas layer cannot enter the fresh gas layer.

[0005] The waste gas layer is provided with a waste gas generating device, and a plurality of detector mounting portions are provided in the waste gas layer and / or the fresh gas layer, and a gas molecule detector is provided at each detector mounting portion.

[0006] The cover body is provided with a plurality of gas outlet holes on the outer surface of the waste gas layer and a plurality of gas inlet holes on the outer surface of the fresh gas layer.

[0007] The device to be detected is arranged in the air extraction module, and the air extraction module is sealingly connected with the gas inlet holes and the gas outlet holes, respectively, and the air extraction module is used to extract the gas in the waste gas layer, and then the gas passes through the device to be detected and enters the fresh gas layer.

[0008] In some embodiments, the separation surface between the waste gas layer and the fresh gas layer is further provided with a gas path switch, which can be opened or closed; when the gas path switch is opened, the gas between the waste gas layer and the fresh gas layer is in communication with each other.

[0009] In some embodiments, the cover body is provided with an operation port on the outer surface of the waste gas layer and the fresh gas layer, the operation port can be opened or sealingly closed, and when the operation port is opened, the worker can operate the inside of the cover body.

[0010] In some embodiments, the air extraction module comprises an air extraction fan and a pipeline.

[0011] In some embodiments, the outer surface of the cover is further provided with a differential pressure table mounting portion, the differential pressure table mounting portion spans the exhaust gas layer and the fresh gas layer, a differential pressure table is arranged at the differential pressure table mounting portion, and a gas passage hole is arranged on the exhaust gas layer and the fresh gas layer corresponding to the differential pressure table mounting portion; the two gas passage holes are in communication with the differential pressure table, and the differential pressure table is used for displaying the pressure difference of the gas in the exhaust gas layer and the fresh gas layer, so as to observe and adjust the change of the pressure and flow of the gas sent into the fresh gas layer by the air extraction module.

[0012] In some embodiments, the gas molecule detector comprises a carbon dioxide molecule detector and an oxygen molecule detector.

[0013] Another aspect of the present application provides a detection method for gas exchange and filtration in a closed environment, which adopts the detection device described above and comprises the following steps:

[0014] S1, the detection device is assembled, the exhaust gas generating device and the air extraction module are turned on, the gas in the exhaust gas layer is directly extracted into the fresh gas layer, after a preset time, the corresponding data is measured by the gas molecule detector and recorded;

[0015] S2, the exhaust gas generating device is turned off, the gas in the cover is extracted to the external exhaust gas treatment device by the air extraction module, and air is supplemented into the cover, until the value of the gas molecule detector returns to the normal value in the external air, and then the air extraction module is turned off;

[0016] S3, the detection device to be detected is installed in the air extraction module, the detection device is assembled again, the exhaust gas generating device and the air extraction module are turned on, the gas in the exhaust gas layer enters the fresh gas layer after being treated by the detection device to be detected, after a preset time, the corresponding data is measured by the gas molecule detector and recorded, and the performance of the detection device to be detected is judged by comparing the data measured in step S1.

[0017] Compared with the prior art, the present application has the following beneficial effects:

[0018] The detection method and device for gas exchange and filtration in a closed environment provided by the present application can detect the performance of various gas exchange and filtration products according to actual conditions, so as to avoid substandard product performance and ensure the life safety of workers in special environments. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 FIG. 1 is a schematic view of the cover in the detection device for gas exchange and filtration in a closed environment provided by the present application;

[0020] Figure 2 FIG. 2 is a schematic view of the overall detection device for gas exchange and filtration in a closed environment provided by the present application;

[0021] Figure 3 For Figure 2 Another angle view. DETAILED DESCRIPTION

[0022] In order to make the technical means, creative features, purposes and effects of the present application easy to understand, the following will further describe how the present application is implemented in combination with the drawings and specific embodiments.

[0023] Referring to Figures 1-3 As shown in the drawings, the present application provides a detection device for gas exchange and filtration in a closed environment, which comprises a cover body 1 and an air extraction module 2; the cover body 1 is a double-layer structure comprising a waste gas layer 11 and a fresh gas layer 12, the waste gas layer 11 and the fresh gas layer 12 are mutually separated, and a plurality of one-way valve mounting portions 10 are arranged on the separation surface, a one-way valve is arranged at each one-way valve mounting portion 10, the one-way valve is used to enable the gas in the fresh gas layer 12 to enter the waste gas layer 11, while the gas in the waste gas layer 11 cannot enter the fresh gas layer 12; a waste gas generating device is arranged in the waste gas layer 11, a plurality of detector mounting portions 17 are arranged in the waste gas layer 11 and / or the fresh gas layer 12, and a gas molecule detector is arranged at each detector mounting portion 17; a plurality of gas outlet holes 13 are arranged on the outer surface of the waste gas layer 11 of the cover body 1, and a plurality of gas inlet holes 14 are arranged on the outer surface of the fresh gas layer 12; a device to be detected 3 is arranged in the air extraction module 2, and the air extraction module 2 is sealingly connected with the gas inlet holes 14 and the gas outlet holes 13, respectively, the air extraction module 2 is used to extract the gas in the waste gas layer 11, and after the gas passes through the device to be detected 3, the gas enters the fresh gas layer 12.

[0024] Preferably, the separation surface between the waste gas layer 11 and the fresh gas layer 12 is further provided with a gas path switch 15, the gas path switch 15 can be opened or closed; when the gas path switch 15 is opened, the gas between the waste gas layer 11 and the fresh gas layer 12 is in communication with each other.

[0025] Preferably, the cover body 1 is provided with an operation port 16 on the outer surface of the waste gas layer 11 and the fresh gas layer 12, the operation port 16 can be opened or sealingly closed, when the operation port 16 is opened, the staff can operate the inside of the cover body 1.

[0026] Preferably, the air extraction module 2 can comprise an air extraction fan and a pipeline.

[0027] Preferably, the outer surface of the cover 1 is further provided with a differential pressure gauge mounting portion 18, the differential pressure gauge mounting portion 18 spans the exhaust gas layer 11 and the fresh gas layer 12, a differential pressure gauge is arranged at the differential pressure gauge mounting portion 18, and a gas passage hole 19 is arranged on the exhaust gas layer 11 and the fresh gas layer 12 corresponding to the differential pressure gauge mounting portion 18; the two gas passage holes 19 are both in communication with the differential pressure gauge, and the differential pressure gauge is used to display the pressure difference between the exhaust gas layer 11 and the fresh gas layer 12 (the pressure of the gas in the fresh gas layer 12 is greater than the pressure of the gas in the exhaust gas layer 11), so as to facilitate observation and adjustment of the change of the pressure and flow of the gas sent into the fresh gas layer 12 by the air extraction module 2.

[0028] Further, the gas molecule detector includes a carbon dioxide molecule detector and an oxygen molecule detector, and other types of gas sensors can also be added according to actual conditions.

[0029] In another aspect, the present application provides a detection method for gas exchange and filtration in a closed environment, which uses the detection device described above, and includes the following steps:

[0030] S1, the detection device is assembled, the exhaust gas generating device and the air extraction module 2 are turned on, the gas in the exhaust gas layer 11 is directly extracted into the fresh gas layer 12, after a predetermined time, the corresponding data is measured by the gas molecule detector and recorded;

[0031] S2, the exhaust gas generating device is turned off, the gas in the cover 1 is extracted to the external exhaust gas treatment device by the air extraction module 2, and air is supplemented into the cover 1, until the value of the gas molecule detector returns to the normal value in the external air, and then the air extraction module is turned off;

[0032] S3, the to-be-detected device 3 is installed in the air extraction module 2, the detection device is assembled again, the exhaust gas generating device and the air extraction module 2 are turned on, the gas in the exhaust gas layer 11 is processed by the to-be-detected device 3 and then enters the fresh gas layer 12, after a predetermined time, the corresponding data is measured by the gas molecule detector and recorded, and the performance of the to-be-detected device 3 is judged by comparing the data measured in step S1.

[0033] In summary, the detection method and device for gas exchange and filtration in a closed environment provided by the present application can detect the performance of various gas exchange and filtration products according to actual conditions, so as to avoid substandard product performance and ensure the life safety of workers in special environments.

[0034] Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the present application but not limit the present application, although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced equivalently without departing from the purpose and scope of the present application, and all of them should be covered in the scope of the claims of the present application.

Claims

1. A detection device for gas exchange and filtration in a closed environment, characterized in that, Includes a cover (1) and an air extraction module (2); The cover (1) has a double-layer structure, including an exhaust gas layer (11) and a fresh gas layer (12). The exhaust gas layer (11) and the fresh gas layer (12) are separated from each other, and a number of one-way valve mounting parts (10) are provided on the partition surface. Each one-way valve mounting part (10) is provided with a one-way valve. The one-way valve is used to allow the gas in the fresh gas layer (12) to enter the exhaust gas layer (11), while the gas in the exhaust gas layer (11) cannot enter the fresh gas layer (12). The waste gas layer (11) is provided with a waste gas generating device, and a number of detector installation parts (17) are provided in the waste gas layer (11) and / or fresh gas layer (12), and a gas molecule detector is provided at each detector installation part (17). The cover (1) has a number of air outlets (13) on the outer surface of the exhaust gas layer (11) and a number of air inlets (14) on the outer surface of the fresh gas layer (12). The device to be tested (3) is set in the air extraction module (2), and the air extraction module (2) is sealed to the air inlet (14) and the air outlet (13) respectively. The air extraction module (2) is used to extract the gas in the waste gas layer (11) and let the gas pass through the device to be tested (3) and then enter the new gas layer (12). The outer surface of the cover (1) is also provided with a differential pressure gauge mounting part (18), which spans the exhaust gas layer (11) and the fresh gas layer (12). A differential pressure gauge is provided at the differential pressure gauge mounting part (18), and a vent hole (19) is opened on the exhaust gas layer (11) and the fresh gas layer (12) corresponding to the differential pressure gauge mounting part (18). Both vent holes (19) are connected to the differential pressure gauge. The differential pressure gauge is used to display the gas pressure difference between the exhaust gas layer (11) and the fresh gas layer (12) so as to observe and adjust the pressure and flow rate changes of the gas sent into the fresh gas layer (12) by the extraction module (2).

2. The detection device for gas exchange and filtration in a closed environment according to claim 1, characterized in that, A gas circuit switch (15) is also provided on the partition between the exhaust gas layer (11) and the fresh gas layer (12). The gas circuit switch (15) can be opened or closed. When the gas circuit switch (15) is opened, the gas between the exhaust gas layer (11) and the fresh gas layer (12) is interconnected.

3. The detection device for gas exchange and filtration in a closed environment according to claim 1, characterized in that, The hood (1) is provided with an operation port (16) on the outer surface of both the exhaust gas layer (11) and the fresh gas layer (12). The operation port (16) can be opened or sealed closed. When the operation port (16) is open, the staff can operate inside the hood (1).

4. The detection device for gas exchange and filtration in a closed environment according to claim 1, characterized in that, The exhaust module (2) includes an exhaust fan and piping.

5. The detection device for gas exchange and filtration in a closed environment according to claim 1, characterized in that, The gas molecule detector includes a carbon dioxide molecule detector and an oxygen molecule detector.

6. A method for detecting gas exchange and filtration in a closed environment, characterized in that, The detection device according to any one of claims 1-5 is used, and includes the following steps: S1, after assembling the detection device, turn on the exhaust gas generating device and the extraction module (2) to directly extract the gas in the exhaust gas layer (11) into the new gas layer (12). After a preset time, measure and record the corresponding data through the gas molecule detector. S2, shut down the exhaust gas generating device, extract the gas inside the hood (1) to the external exhaust gas treatment device through the extraction module (2), and replenish the hood (1) with air until the value of the gas molecule detector returns to the normal value in the outside air, then shut down the extraction module (2). S3, install the device to be tested (3) in the gas extraction module (2), reassemble the testing device, turn on the exhaust gas generating device and the gas extraction module (2), so that the gas in the exhaust gas layer (11) is processed by the device to be tested (3) and then enters the new gas layer (12). After a preset time, measure the corresponding data by the gas molecule detector and record it. By comparing it with the data measured in step S1, the performance of the device to be tested (3) can be judged.

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