Refrigerant sensor testing device

Abstract

The utility model relates to the technical field of performance testing of refrigerant sensors, in particular to a refrigerant sensor testing device. The refrigerant sensor testing device comprises a tank body, a testing cavity, a movable cover and a testing cavity cover, the upper end of the tank body is opened; a refrigerant inlet regulating valve, a refrigerant outlet regulating valve and a refrigerant concentration detection head are arranged on the side wall of the tank body; the upper end and the lower end of the test cavity are opened, and the upper end of the test cavity is fixed in the upper end opening of the tank body; the movable cover is detachably connected with an opening in the upper end of the test cavity; the test cavity cover is arranged in an inner cavity of the tank body and is connected with the tank body through a driving device; the driving device is suitable for driving the test cavity cover to open or seal the lower end opening of the test cavity; a placing frame is arranged in the testing cavity and is suitable for placing a refrigerant sensor. The device is simple in structure, and can effectively test the performance of the refrigerant sensor.

Description

Technical Field

[0001] The utility model relates to the technical field of performance testing of refrigerant sensors, in particular to a refrigerant sensor testing device. Background Art

[0002] In existing air conditioning systems, refrigerant leakage, particularly of flammable and explosive refrigerants, is a significant threat to the air conditioner's lifespan and safety. Existing air conditioners employ refrigerant sensors placed at multiple leak points, such as pipeline connections, to determine the actual leak location based on sensor data. Therefore, it is crucial to ensure that these refrigerant sensors can effectively monitor the refrigerant concentration in the air conditioner.

[0003] Before leaving the factory, refrigerant sensors must be tested for performance to ensure they are qualified. Specifically, they must be able to effectively detect refrigerant concentration. However, there is no simple test device suitable for testing refrigerant sensor performance. Utility Model Content

[0004] The purpose of the utility model is to provide a refrigerant sensor testing device with a simple structure and capable of effectively testing the performance of the refrigerant sensor.

[0005] To achieve this purpose, the present invention adopts the following technical solutions:

[0006] A refrigerant sensor testing device is used to test the performance of a refrigerant sensor, the refrigerant sensor testing device comprising a tank body, a test cavity, a movable cover, and a test cavity cover;

[0007] The interior of the tank body is hollow and its upper end is open; the side wall of the tank body is provided with a refrigerant inlet regulating valve, a refrigerant outlet regulating valve and a refrigerant concentration detection head for detecting the refrigerant concentration in the tank body; the air inlet of the refrigerant inlet regulating valve is connected to the refrigerant air supply pipe, and the air outlet thereof is connected to the inner cavity of the tank body; the air inlet of the refrigerant outlet regulating valve is connected to the inner cavity of the tank body, and the air inlet is connected to the recovery tank through an air pump;

[0008] The upper and lower ends of the test cavity are open, and the upper end of the test cavity is fixed in the upper end opening of the tank body; the movable cover is placed above the tank body and is detachably connected to the upper end opening of the test cavity; the test cavity cover is placed in the inner cavity of the tank body and is connected to the tank body through a driving device; the driving device is suitable for driving the test cavity cover to open or seal the lower end opening of the test cavity; a placement rack is provided in the test cavity, and the placement rack is suitable for placing the refrigerant sensor. Through the cooperation of the refrigerant inlet regulating valve, the refrigerant outlet regulating valve and the refrigerant concentration detection head, the refrigerant concentration in the inner cavity of the tank body is accurately adjusted, and the test cavity cover is driven by the driving device to open or seal the lower end opening of the test cavity so that the refrigerant sensor placed in the test cavity can be tested to test the performance of the refrigerant sensor. The refrigerant sensor testing device has a simple structure, is easy to maintain, and can effectively test the performance of the refrigerant sensor.

[0009] Furthermore, the refrigerant outlet regulating valve, the refrigerant concentration detection head, and the refrigerant inlet regulating valve are arranged in sequence from top to bottom. The above solution ensures that the refrigerant injected into the tank cavity is quickly and evenly distributed, and the refrigerant concentration detection head effectively detects the refrigerant concentration in the tank cavity.

[0010] Furthermore, the bottom of the placement rack is provided with a plurality of vent holes, and the placement rack is provided with a plurality of clamping members, which are suitable for clamping the refrigerant sensor. The above solution allows the refrigerant gas in the tank to pass through the placement rack and be evenly diffused in the test chamber.

[0011] Furthermore, the refrigerant sensor testing device further comprises a base, the base being arranged at the bottom of the tank, and a counterweight being arranged inside the base. The above solution is adopted to make the placement of the refrigerant sensor testing device more stable.

[0012] Furthermore, the tank body includes a top cover, a tank body, and a bottom cover connected in sequence from top to bottom; a first sealing gasket is provided between the top cover and the tank body; and a second sealing gasket is provided between the tank body and the bottom cover. The above solution facilitates disassembly, cleaning, and maintenance of the tank body.

[0013] Furthermore, the lower end of the movable cover is threadedly connected to the upper end opening of the test cavity; and a vertical rod for holding is provided on the top of the movable cover. With the above solution, the movable cover can be threadedly connected to or separated from the test cavity.

[0014] Furthermore, the driving device is a pneumatic cylinder adapted to drive the test chamber cover to raise or lower the test chamber cover, thereby opening or sealing the lower opening of the test chamber. A compressed air regulating valve connected to the driving device is provided on the side wall of the tank body. With this solution, the test chamber cover can open or seal the lower opening of the test chamber.

[0015] Furthermore, the refrigerant sensor testing device further includes a stirring fan disposed at the bottom of the tank cavity and below the refrigerant inlet regulating valve. This solution ensures that the refrigerant injected into the tank cavity is quickly and evenly distributed.

[0016] The refrigerant sensor testing device further includes a nut; an axial connection hole is defined in the center of the movable cover, the nut is threadedly connected to the axial connection hole, and a wire hole is defined in the center of the nut for passing the refrigerant sensor cable; the upper end of the wire hole is ringed with soft silicone. This solution allows the refrigerant sensor cable to be threaded through the refrigerant sensor testing device.

[0017] Furthermore, the refrigerant sensor testing device also includes a refrigerant concentration monitor; the refrigerant concentration monitor is located outside the tank and connected to the refrigerant concentration detection head. The refrigerant concentration monitor is suitable for a worker to monitor the refrigerant concentration in the tank cavity in real time. The above solution allows a worker to monitor the refrigerant concentration in the tank cavity in real time.

[0018] The technical solution provided by the utility model may have the following beneficial effects:

[0019] The refrigerant sensor test device has a simple structure, is easy to maintain, and can effectively test the performance of the refrigerant sensor;

[0020] Through the coordination of the refrigerant inlet regulating valve, the refrigerant outlet regulating valve and the refrigerant concentration detection head, the refrigerant concentration in the tank cavity can be accurately adjusted;

[0021] The test cavity cover is driven by a driving device to open or seal the lower end opening of the test cavity so that a refrigerant sensor placed in the test cavity can be tested to test the performance of the refrigerant sensor.

[0022] A stirring fan is provided to ensure that the refrigerant injected into the tank cavity is quickly and evenly distributed. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the three-dimensional structure of the refrigerant sensor testing device in the utility model;

[0024] Figure 2 It is a schematic diagram of the test cavity cover sealing the lower end opening of the test cavity in the present invention;

[0025] Figure 3 This is a schematic diagram of the test cavity cover in the present invention opening the lower end opening of the test cavity;

[0026] Figure 4 This is a partial cross-sectional structural diagram of the refrigerant sensor testing device in the present utility model;

[0027] Figure 5 This is a schematic structural diagram of the top cover of the utility model;

[0028] Figure 6 It is a partial cross-sectional structural diagram of the test chamber and the placement rack in the utility model;

[0029] Figure 7 It is a schematic diagram of the partial cross-section structure of the test cavity in the utility model;

[0030] Figure 8 It is a partial cross-sectional structural diagram of the movable cover in the utility model.

[0031] The accompanying drawings are as follows:

[0032] 1. Tank body; 101. Top cover; 102. Tank body; 103. Bottom cover; 104. Mounting slot; 2. Test chamber; 3. Movable cover; 301. Vertical pole; 4. Test chamber cover; 5. Drive unit; 6. Placement rack; 7. Base; 8. Refrigerant inlet regulating valve; 9. Refrigerant outlet regulating valve; 10. Compressed air regulating valve; 11. Refrigerant concentration detection head; 12. Stirring fan; 13. Nut; 14. Bevel sealing ring. DETAILED DESCRIPTION

[0033] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0034] In the description of the present invention, it should be understood that the terms "longitudinal", "transverse", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operate in a specific direction, and therefore should not be understood as limiting the present invention. In addition, features defined as "first" or "second" may explicitly or implicitly include one or more such features, and are used to distinguish between the described features, without distinction of order or importance.

[0035] In the description of the present invention, unless otherwise specified, “a plurality of” means two or more.

[0036] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0037] The utility model provides a refrigerant sensor testing device, which is used for testing the performance of the refrigerant sensor.

[0038] See also Figures 1 to 3 As shown, the refrigerant sensor testing device includes a tank body 1, a testing cavity 2, a movable cover 3, a testing cavity cover 4, a driving device 5 and a placement rack 6.

[0039] Among them, the interior of the tank body 1 is hollow, and the upper end of the tank body 1 is open. The upper and lower ends of the test cavity 2 are open. The test cavity 2 is inserted into the tank body 1, and the upper end of the test cavity 2 is fixed in the upper end opening of the tank body 1. The movable cover 3 is placed above the tank body 1, and the upper end opening of the test cavity 2 is detachably connected to the movable cover 3. The test cavity cover 4 is placed in the inner cavity of the tank body 1, and is located below the lower end opening of the test cavity 2. The test cavity cover 4 is connected to the tank body 1 through a driving device 5. The driving device 5 is used to drive the test cavity cover 4 to open or seal the lower end opening of the test cavity 2. A placement rack 6 is provided in the test cavity 2, and the placement rack 6 is suitable for placing a refrigerant sensor.

[0040] The side wall of the tank body 1 is provided with a refrigerant inlet regulating valve 8, a refrigerant outlet regulating valve 9, and a refrigerant concentration detection head 11. The air inlet of the refrigerant inlet regulating valve 8 is located outside the tank body 1 and is connected to the refrigerant supply pipeline. The air outlet of the refrigerant inlet regulating valve 8 is located within the inner cavity of the tank body 1. The refrigerant inlet regulating valve 8 is adapted to control the rate of refrigerant gas injected into the inner cavity of the tank body 1. The air inlet of the refrigerant outlet regulating valve 9 is located within the inner cavity of the tank body 1. The air outlet of the refrigerant outlet regulating valve 9 is located outside the tank body 1 and is connected to a recovery tank via an air extraction pump. The refrigerant outlet regulating valve 9 is adapted to control the rate of refrigerant gas discharged from the inner cavity of the tank body 1. Through the cooperation of the refrigerant outlet regulating valve 9, the air extraction pump, and the recovery tank, the refrigerant gas within the tank body 1 is recovered, ensuring environmental protection and safety, and improving safety performance. The refrigerant concentration detection head 11 is disposed in the tank body 1 and is used to detect the refrigerant concentration in the inner cavity of the tank body 1 .

[0041] In this embodiment, the refrigerant outlet regulating valve 9, the refrigerant concentration detection head 11 and the refrigerant inlet regulating valve 8 are arranged on the side wall of the tank body 1 in sequence from top to bottom to ensure that the refrigerant injected into the inner cavity of the tank body 1 is quickly and evenly distributed, and the refrigerant concentration detection head 11 effectively detects the refrigerant concentration in the inner cavity of the tank body 1.

[0042] In this embodiment, a flow meter is connected to the outside of the refrigerant inlet regulating valve 8 , which can accurately adjust the weight and concentration of the refrigerant injected into the tank body 1 .

[0043] In this embodiment, a plurality of clamping members (not shown) are provided on the placement rack 6. The plurality of clamping members can clamp a plurality of refrigerant sensors for simultaneous testing.

[0044] Furthermore, a plurality of air holes are provided at the bottom of the placement rack 6 so that the refrigerant gas in the tank body 1 can pass through the placement rack 6 and be evenly diffused in the test cavity 2 .

[0045] In some embodiments, see Figure 7 As shown, the inner cavity of the test cavity 2 is provided with an annular protrusion for supporting the placement rack 6, so that the test cavity 2 and the placement rack 6 can be detachably connected.

[0046] In some embodiments, see Figure 6 As shown, in order to prevent the placement rack 6 from rotating relative to the inner cavity of the test cavity 2, a limiting protrusion is provided on the outer edge of the placement rack 6, and a limiting groove is correspondingly provided on the inner side wall of the test cavity 2.

[0047] Furthermore, the refrigerant sensor testing device further comprises a base 7. The base 7 is arranged at the bottom of the tank body 1. A counterweight is provided in the base 7 to make the placement of the refrigerant sensor testing device more stable.

[0048] Further, see Figure 4 As shown, the tank body 1 is a split structure. Specifically, the tank body 1 includes a top cover 101, a tank body 102 and a bottom cover 103 connected in sequence from top to bottom. Among them, the upper end opening of the tank body 1 is opened at the center of the top cover 101. The test chamber 2 is arranged at the center of the top cover 101. The top cover 101 and the tank body 102 are connected by a hexagonal screw, and a first sealing gasket is provided between the top cover 101 and the tank body 102. The first sealing gasket is used for the sealing connection between the top cover 101 and the tank body 102. The tank body 102 and the bottom cover 103 are connected by a hexagonal screw, and a second sealing gasket is provided between the tank body 102 and the bottom cover 103. The second sealing gasket is used for the sealing connection between the tank body 102 and the bottom cover 103. The bottom cover 103 is connected to the base 7 by a hexagonal screw.

[0049] The refrigerant inlet regulating valve 8 , the refrigerant outlet regulating valve 9 and the refrigerant concentration detection head 11 are arranged on the tank body 102 . The driving device 5 is installed on the top of the bottom cover 103 .

[0050] Preferably, the hexagonal screw passes through the base 7 and the bottom cover 103 in sequence and is threadedly connected to the tank body 102 .

[0051] Furthermore, the lower end of the movable cover 3 is threadedly connected to the upper end opening of the test chamber 2. A sealing gasket is provided between the movable cover 3 and the top cover 101. Figure 5 As shown, a mounting groove 104 for mounting a sealing gasket is provided on the top of the top cover 101. The lower end of the movable cover 3 is provided with an external thread, and the upper end opening of the test cavity 2 is correspondingly provided with an internal thread.

[0052] Further, see Figure 8 As shown, in order to facilitate the rotation of the movable cover 3, a vertical rod 301 for holding is provided on the top of the movable cover 3. The staff can rotate the movable cover 3 through the vertical rod 301 to thread the movable cover 3 to connect or separate the movable cover 3 from the test chamber 2.

[0053] Furthermore, the driving device 5 is a cylinder fixed to the bottom of the inner cavity of the tank body 1. The test cavity cover 4 is placed directly below the lower opening of the test cavity 2. The driving device 5 is suitable for driving the test cavity cover 4 to rise and fall, so that the test cavity cover 4 opens or seals the lower opening of the test cavity 2.

[0054] In this embodiment, two compressed air regulating valves 10 are spaced apart on the tank body 102. The two compressed air regulating valves 10 are respectively a first compressed air regulating valve and a second compressed air regulating valve. The air inlet of the first compressed air regulating valve is arranged in the inner cavity of the tank body 1 and is connected to the air outlet of the drive device 5 via a corresponding air pipe. The air outlet of the first compressed air regulating valve is arranged outside the tank body 1. The air outlet of the second compressed air regulating valve is arranged in the inner cavity of the tank body 1 and is connected to the air inlet of the drive device 5 via a corresponding air pipe. The air inlet of the second compressed air regulating valve is arranged outside the tank body 1. The compressed air in the compressed air supply pipe enters the cylinder through the first compressed air regulating valve or the second compressed air regulating valve to drive the piston of the cylinder to move up and down, thereby driving the test chamber cover 4 to move up and down. The cylinder is a prior art and will not be described in detail.

[0055] In this embodiment, the two compressed air regulating valves 10 are located below the refrigerant outlet regulating valve 9. Preferably, the refrigerant inlet regulating valve 8 and the refrigerant outlet regulating valve 9 are positioned on the left and right sides of the inner cavity of the tank body 102. The refrigerant concentration detection head 11 is located directly above the refrigerant inlet regulating valve 8. The two compressed air regulating valves 10 are located directly below the refrigerant outlet regulating valve 9.

[0056] Furthermore, to ensure rapid and even distribution of the refrigerant injected into the interior of tank body 1, the refrigerant sensor testing device also includes a stirring fan 12. This stirring fan 12 is disposed at the bottom of the interior of tank body 1 and is located below refrigerant inlet regulating valve 8. This stirring fan 12 stirs the refrigerant injected into tank body 1 through refrigerant inlet regulating valve 8, ensuring rapid and even distribution of the gas within tank body 1.

[0057] In this embodiment, the stirring fan 12 is fixed on the bottom cover 103 .

[0058] Furthermore, the refrigerant sensor testing device further includes a nut 13. An axial connection hole is defined in the center of the movable cover 3. The nut 13 is threadedly connected to the axial connection hole, and a wire hole is defined in the center of the nut 13 for passing the refrigerant sensor cable.

[0059] Furthermore, an oblique sealing ring 14 is provided between the movable cover 3 and the nut 13 to improve the airtightness of the inner cavity of the test chamber 2. The oblique sealing ring 14 is placed below the nut 13.

[0060] Furthermore, the upper end of the wire hole of the nut 13 is ringed with soft silicone (not shown in the figure), so that when the cable of the refrigerant sensor is passed through the wire hole, the soft silicone effectively seals the upper end of the wire hole to improve the air tightness of the inner cavity of the test cavity 2.

[0061] Furthermore, the refrigerant sensor testing device also includes a refrigerant concentration monitor. The refrigerant concentration monitor is located outside the tank 1 and is connected to the refrigerant concentration detection head 11, allowing staff to monitor the refrigerant concentration in the tank 1 in real time to ensure accurate and consistent test concentrations during the test process.

[0062] In this embodiment, the working principle of the refrigerant sensor testing device is as follows:

[0063] Before testing, separate the nut 13 from the movable cover 3; thereafter, assemble the refrigerant sensor to be tested on the placement rack 6, and pass the cable of the refrigerant sensor to be tested through the wire hole of the nut 13 so that the cable of the refrigerant sensor to be tested extends to the outside of the refrigerant sensor testing device; finally, thread the nut 13 to the movable cover 3.

[0064] During testing, the drive device 5 drives the test chamber cover 4 upward to seal the lower opening of the test chamber 2. The refrigerant supply pipe then injects refrigerant into the inner cavity of the tank body 1 through the refrigerant inlet regulating valve 8. During this process, the stirring fan 12 stirs the refrigerant injected into the tank body 1 through the refrigerant inlet regulating valve 8, quickly and evenly distributing the gas inside the tank body 1. When the refrigerant concentration monitor detects that the refrigerant concentration in the tank body 1 has reached the required test concentration and is stable through the refrigerant concentration detection head 11, the drive device 5 drives the test chamber cover 4 downward to open the lower opening of the test chamber 2. At this concentration, the sensing condition of the refrigerant sensor on the placement rack 6 is tested to test the performance of the refrigerant sensor.

[0065] After the test is completed, the refrigerant gas in the tank body 1 is recovered through the cooperation of the refrigerant outlet regulating valve 9, the vacuum pump and the recovery tank.

[0066] Among them, the staff can compare the refrigerant concentration displayed by the refrigerant concentration monitor with the refrigerant concentration measured by the refrigerant sensor to determine whether the refrigerant sensor can accurately detect the refrigerant concentration.

[0067] Furthermore, the detection accuracy of the refrigerant concentration monitor and the refrigerant concentration detection head 11 is greater than the detection accuracy of the refrigerant sensor.

[0068] This refrigerant sensor testing device features a simple structure, is easy to maintain, and effectively tests refrigerant sensor performance. The refrigerant inlet and outlet regulating valves, along with a refrigerant concentration detection probe, accurately adjust the refrigerant concentration within the tank cavity. A drive mechanism activates the test chamber lid to open or seal the lower opening of the test chamber, allowing testing of the refrigerant sensor placed within the chamber. A stirring fan ensures rapid and even distribution of the refrigerant injected into the tank cavity.

[0069] Throughout this specification, references to terms such as "embodiment" and "example" indicate that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0070] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A refrigerant sensor testing device for testing the performance of a refrigerant sensor, characterized in that: The refrigerant sensor testing device comprises a tank body, a testing cavity, a movable cover and a testing cavity cover; The interior of the tank body is hollow and its upper end is open; the side wall of the tank body is provided with a refrigerant inlet regulating valve, a refrigerant outlet regulating valve and a refrigerant concentration detection head for detecting the refrigerant concentration in the tank body; the air inlet of the refrigerant inlet regulating valve is connected to the refrigerant air supply pipe, and the air outlet thereof is connected to the inner cavity of the tank body; the air inlet of the refrigerant outlet regulating valve is connected to the inner cavity of the tank body, and the air inlet is connected to the recovery tank through an air pump; The upper and lower ends of the test cavity are open, and the upper end of the test cavity is fixed in the upper end opening of the tank body; the movable cover is placed above the tank body and is detachably connected to the upper end opening of the test cavity; the test cavity cover is placed in the inner cavity of the tank body and is connected to the tank body through a driving device; the driving device is suitable for driving the test cavity cover to open or seal the lower end opening of the test cavity; a placement rack is provided in the test cavity, and the placement rack is suitable for placing the refrigerant sensor.

2. The refrigerant sensor testing device according to claim 1, characterized in that: The refrigerant outlet regulating valve, the refrigerant concentration detection head and the refrigerant inlet regulating valve are arranged in sequence from top to bottom.

3. The refrigerant sensor testing device according to claim 1, characterized in that: A plurality of ventilation holes are provided at the bottom of the placement rack; a plurality of clamping members are provided on the placement rack, and the clamping members are suitable for clamping the refrigerant sensor.

4. The refrigerant sensor testing device according to claim 1, characterized in that: The refrigerant sensor testing device further includes a base; The base is arranged at the bottom of the tank body; a counterweight is arranged inside the base.

5. The refrigerant sensor testing device according to claim 1, characterized in that: The tank body comprises a top cover, a tank body main body and a bottom cover which are sequentially connected from top to bottom; A first sealing gasket is provided between the top cover and the tank body; and a second sealing gasket is provided between the tank body and the bottom cover.

6. The refrigerant sensor testing device according to claim 1, characterized in that: The lower end of the movable cover is threadedly connected to the upper end opening of the test cavity; and a vertical rod for holding is provided on the top of the movable cover.

7. The refrigerant sensor testing device according to claim 1, characterized in that: The driving device is a cylinder, which is suitable for driving the test cavity cover to move up and down so that the test cavity cover opens or seals the lower end opening of the test cavity; the side wall of the tank body is provided with a compressed air regulating valve connected to the driving device.

8. The refrigerant sensor testing device according to claim 1, characterized in that: The refrigerant sensor testing device further includes a stirring fan; The stirring fan is arranged at the bottom of the inner cavity of the tank body and is located below the refrigerant inlet regulating valve.

9. The refrigerant sensor testing device according to claim 1, characterized in that: The refrigerant sensor testing device further includes a nut; An axial connection hole is provided at the center of the movable cover, the nut is threadedly connected to the axial connection hole, and a wire hole is provided at the center of the nut for the cable of the refrigerant sensor to pass through; the upper end of the wire hole is ringed with soft silicone.

10. The refrigerant sensor testing device according to claim 1, characterized in that: The refrigerant sensor testing device also includes a refrigerant concentration monitor; The refrigerant concentration monitor is arranged on the outside of the tank body and is connected to the refrigerant concentration detection head. The refrigerant concentration monitor is suitable for staff to monitor the refrigerant concentration in the inner cavity of the tank body in real time.

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