Refrigerant dissipation detection equipment for vehicle air conditioner

Abstract

The utility model discloses vehicle air conditioner refrigerant dissipation detection equipment, which relates to the technical field of vehicle air conditioner refrigerant dissipation detection and comprises an outer cabin. The inner cabin is arranged in the outer cabin, and the inner cabin is used for placing a vehicle air conditioner; a detector for detecting the refrigerant; activated carbon is arranged in the gas collecting pipe, one end of the gas collecting pipe and the inner cabin are connected with a sampling pipe, and the other end of the gas collecting pipe and the detector are connected with a detection pipe; the sampling pump is arranged on the sampling pipe, and the sampling pump extracts air in the inner cabin to enable the air to enter the air collecting pipe; and the gas collecting pipe is arranged in the low-temperature tank so as to reduce the temperature of the gas collecting pipe. The utility model has the advantages of simple structure and lower cost. The liquid nitrogen is injected into the low-temperature tank to reduce the temperature of the gas collecting pipe, so that the activated carbon in the gas collecting pipe is used for capturing refrigerant components which are difficult to collect, the detection sensitivity is improved, accurate analysis of the air conditioner refrigerant dissipation condition is facilitated, and the industrial green transformation and the carbon neutralization process are facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of refrigerant leakage detection for vehicle air conditioners, and particularly relates to a refrigerant leakage detection device for vehicle air conditioners. Background Technique

[0002] With the continuous increase in global attention to greenhouse gas emissions and ozone layer protection, the problem of refrigerant leakage has become a core issue in environmental governance and industrial upgrading. As an important source of greenhouse gas emissions, refrigerant leakage directly exacerbates global warming.

[0003] The refrigerant leakage detection device for vehicle air conditioners can detect vehicle air conditioners. However, existing detection devices such as the soapy water method have low sensitivity, and electronic leak detectors are costly and complex to operate, making it difficult to meet the high-precision detection requirements for micro-leaks (such as an annual leakage of 0.5 g level) in industries such as automobiles and household appliances. Therefore, there are significant defects in current refrigerant leakage detection devices: the traditional visual inspection method has low sensitivity, electronic leak detectors rely on imports and are costly, are complex to operate and difficult to adapt to multi-scenario requirements. At the same time, the current price of hundreds of thousands of yuan for the whole vehicle air conditioner refrigerant detection environmental chamber and equipment also restricts the popularization and application of refrigerant leakage detection technology. Content of the Utility Model

[0004] The purpose of the utility model is to solve the problems in the prior art, and a simple and low-cost refrigerant leakage detection device for vehicle air conditioners is proposed.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0006] A refrigerant leakage detection device for vehicle air conditioners, which is used to detect vehicle air conditioners, includes:

[0007] An outer chamber;

[0008] An inner chamber, which is arranged inside the outer chamber and is used to place the vehicle air conditioner;

[0009] A detector, which is used to detect the refrigerant;

[0010] A gas collecting pipe, which is internally provided with activated carbon. One end of the gas collecting pipe is connected to the inner chamber by a sampling pipe, and the other end is connected to the detector by a detection pipe;

[0011] A sampling pump, which is arranged on the sampling pipe. The sampling pump extracts the air inside the inner chamber and makes it enter the gas collecting pipe;

[0012] And a cryogenic tank. The gas collecting pipe is arranged inside the cryogenic tank to reduce the temperature of the gas collecting pipe and collect the refrigerant.

[0013] Furthermore, a connecting pipe is provided on the cryogenic tank, and a valve is provided on the connecting pipe. The connecting pipe is used to inject liquid nitrogen into the cryogenic tank.

[0014] Further, a circulation air duct is provided inside the inner cabin, a ventilation plate is provided inside the inner cabin, a circulation fan is provided at the rear side of the ventilation plate, the circulation fan enables the air inside the inner cabin to circulate back and forth through the circulation air duct, an installation seat is provided inside the inner cabin, and the installation seat is used for installing a vehicle air conditioner.

[0015] Further, a pressure balance bag is provided on one side of the inner cabin, and nitrogen is filled inside the pressure balance bag.

[0016] Further, a sampling port is provided on the inner cabin, one end of a sampling tube is connected to the sampling port, and the other end penetrates into the inside of the cryogenic tank.

[0017] Further, a pre-valve is provided on the sampling tube, and a post-valve is provided on the detection tube.

[0018] Further, a placement rack is further included, and the detector is placed on the placement rack.

[0019] Further, an inner cabin door is provided on one side of the inner cabin, an observation window is provided on the inner cabin door, a sealing ring is provided on the inner cabin door, an outer cabin door is provided on one side of the outer cabin, the upper end of the outer cabin door is rotatably connected to the outer cabin, a driving member is provided between the outer cabin and the outer cabin door for driving the outer cabin door to open and close, and a sealing ring is provided on the outer cabin door.

[0020] The beneficial effects of the present utility model are as follows:

[0021] In the present utility model, the vehicle air conditioner refrigerant leakage detection device has a simple structure and low cost. By statistically analyzing the real-time concentration changes of the refrigerant in the inner cabin under different temperature conditions, the total amount of refrigerant leakage of the vehicle air conditioner under all working conditions is calculated. By injecting liquid nitrogen into the cryogenic tank, the temperature of the gas collecting pipe is reduced, so that the activated carbon inside the gas collecting pipe can capture the refrigerant components that are difficult to collect, improving the detection sensitivity, which is conducive to accurately analyzing the refrigerant leakage situation of the air conditioner and facilitating the green transformation of the industry and the carbon neutralization process. Description of the Drawings

[0022] Figure 1 It is a three-dimensional structural schematic diagram of the outer cabin of a vehicle air conditioner refrigerant leakage detection device proposed by the present utility model;

[0023] Figure 2 It is a three-dimensional structural schematic diagram of the inner cabin of a vehicle air conditioner refrigerant leakage detection device proposed by the present utility model;

[0024] Figure 3 It is a cross-sectional view of the three-dimensional structure of the inner cabin of a vehicle air conditioner refrigerant leakage detection device proposed by the present utility model;

[0025] Figure 4 It is a three-dimensional structural schematic diagram of the detector of a vehicle air conditioner refrigerant leakage detection device proposed by the present utility model;

[0026] Figure 5 Schematic structural diagram of a vehicle air conditioner refrigerant leakage detection device proposed by the present utility model;

[0027] Figure 6 Data graph of the detection results of this embodiment.

[0028] In the figure: 1 outer cabin, 101 outer cabin door, 102 driving part, 2 inner cabin, 201 circulation air duct, 202 mounting seat, 203 sampling port, 204 inner cabin door, 3 circulation fan, 4 ventilation plate, 5 air conditioner body, 6 pressure balance bag, 7 sampling pump, 8 pre - valve, 9 sampling tube, 10 cryogenic tank, 11 detector, 1101 placement rack, 12 post - valve, 13 detection tube, 14 gas collecting pipe, 15 connecting pipe. Specific embodiments

[0029] The technical solutions of this patent will be further described in detail below in conjunction with specific embodiments.

[0030] The embodiments of this patent will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain this patent and should not be construed as a limitation of this patent.

[0031] In the description of this patent, it should be understood that the orientation or positional relationships indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing this patent and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of this patent.

[0032] In the description of this patent, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", "linkage", "setting" should be understood in a broad sense. For example, it can be fixedly connected and set, or detachably connected and set, or integrally connected and set. For those of ordinary skill in the art, the specific meanings of the above terms in this patent can be understood according to specific circumstances.

[0033] Refer to Figure 1-6 , a vehicle air conditioner refrigerant leakage detection device, which is applied to the leakage detection of vehicle air conditioner refrigerants for the convenience of detecting the refrigerants of vehicle air conditioners.

[0034] The vehicle air-conditioning refrigerant leakage detection device includes an outer cabin 1, an inner cabin 2, a detector 11, a gas collecting pipe 14, a sampling pump 7, and a cryogenic tank 10;

[0035] One side of the outer cabin 1 is provided with an outer cabin door 101. The upper end of the outer cabin door 101 is rotatably connected to the outer cabin 1. A sealing ring is provided on the outer cabin door 101 to maintain the airtightness of the outer cabin 1.

[0036] A driving member 102 is provided between the outer cabin 1 and the outer cabin door 101 for driving the outer cabin door 101 to open and close. In this embodiment, the driving member 102 is an electric push rod, and the outer cabin door 101 can be pushed to rotate and open or close through the electric push rod.

[0037] In some embodiments, a temperature control component is provided inside the outer cabin 1 for controlling the temperature inside the outer cabin 1. The temperature control component belongs to common knowledge and is used to adjust the temperature inside the outer cabin 1, so it will not be elaborated here.

[0038] The inner cabin 2 is arranged inside the outer cabin 1. One side of the inner cabin 2 is provided with an inner cabin door 204. An observation window is provided on the inner cabin door 204, and a sealing ring is provided on the inner cabin door 204 to maintain the airtightness of the inner cabin 2.

[0039] In some embodiments, the size of the inner cabin 2 is: length 2m, width 1m, height 1.5m. The inner cabin 2 is composed of low-adsorption steel plates and a skeleton. The low-adsorption steel plate is 3mm thick, and the skeleton is composed of 1cm steel pipes. One steel pipe is arranged every 0.5m.

[0040] An installation seat 202 is provided inside the inner cabin 2 for installing a vehicle air conditioner. The installation seat 202 can bear a mass greater than 300kg.

[0041] A circulation air duct 201 is provided inside the inner cabin 2. A ventilation plate 4 is provided inside the inner cabin 2. A circulation fan 3 is provided behind the ventilation plate 4. The circulation fan 3 enables the air inside the inner cabin 2 to circulate back and forth through the circulation air duct 201. The air delivery volume of the circulation fan 3 is above 4m 3 / min.

[0042] In some embodiments, a pressure balance bag 6 is provided on one side of the inner cabin 2. Nitrogen is filled inside the pressure balance bag 6. It is used to balance the pressure inside the inner cabin 2.

[0043] The detector 11 is used to detect the refrigerant. The detector 11 is placed on the placement rack 1101. The placement rack 1101 facilitates the placement of the detector 11 and the movement of the detector 11. In this embodiment, the detector 11 adopts an FID detector, which can continuously monitor the refrigerant concentration, output an integral curve graph, and the detection limit needs to be lower than 1ng / m 3 . The model and working principle of the detector 11 belong to common knowledge in the field of refrigerant detection, so they will not be elaborated here.

[0044] The sampling port 203 is provided on the inner cabin 2, and the sampling port 203 is within 10 cm from the surface of the vehicle air conditioner. One end of the sampling tube 9 is connected to the sampling port 203, and the other end penetrates into the interior of the cryogenic tank 10 and is connected to one end of the gas collecting pipe 14. A detection tube 13 is connected between the other end of the gas collecting pipe 14 and the detector 11.

[0045] In some embodiments, the inner diameter of the gas collecting pipe 14 is 1 cm, the effective length is 10 cm, the gas collecting pipe 14 is cylindrical, made of quartz glass, and filled with activated carbon inside.

[0046] The sampling pump 7 is provided on the sampling tube 9. The sampling pump 7 pumps the air inside the inner cabin 2 to make it enter the gas collecting pipe 14. The flow rate of the sampling pump 7 is 10 mL / min.

[0047] The cryogenic tank 10 is provided with a connecting pipe 15. A valve is provided on the connecting pipe 15. The connecting pipe 15 is used to inject liquid nitrogen into the interior of the cryogenic tank 10. The gas collecting pipe 14 is arranged inside the cryogenic tank 10. After liquid nitrogen is injected into the cryogenic tank 10, the temperature of the gas collecting pipe 14 can be reduced, so as to collect the refrigerant on the activated carbon inside the gas collecting pipe 14.

[0048] In some embodiments, a pre-valve 8 is provided on the sampling tube 9, and a post-valve 12 is provided on the detection tube 13.

[0049] The working principle of the vehicle air conditioner refrigerant leakage detection device:

[0050] First, install the vehicle air conditioner on the mounting seat 202. After checking that the seal of the vehicle air conditioner interface is correct, add refrigerant, and connect the sampling tube 9 to the sampling port 203.

[0051] Subsequently, close the inner cabin door 204 to seal the inner cabin 2, transfer the inner cabin 2 to the interior of the outer cabin 1, and connect all pipelines and power supplies.

[0052] Start the circulation fan 3, start the sampling pump 7, and start the detector 11. Do not add liquid nitrogen to the cryogenic tank 10. Open the pre-valve 8 and the post-valve 12. Inject 100 L of nitrogen into the pressure balance bag 6.

[0053] The vehicle air conditioner is turned on and operated. The temperature of the outer cabin 1 is set to 25 °C and maintained for 24 h; subsequently, the temperature of the outer cabin 1 is set to 65 °C and maintained for 24 h; subsequently, the temperature of the outer cabin 1 is set to 80 °C and maintained for 1 h, and liquid nitrogen is added to the interior of the cryogenic tank 10 through the connecting pipe 15 to keep the gas collecting pipe 14 immersed in liquid nitrogen.

[0054] Subsequently, immediately drain the liquid nitrogen in the cryogenic tank 10 through the connecting pipe 15, expose the gas collecting pipe 14 to room temperature air, turn off the sampling pump 7, and close the front-stage valve 8 and the rear-stage valve 12. After 1 hour, turn on the sampling pump 7, the front-stage valve 8, and the rear-stage valve 12. After the detector continues to work for 1 hour, stop it and record the relevant data.

[0055] Finally, stop calculating the result: the amount of air-conditioning refrigerant leakage (ng / m 3 ) = cumulative monitoring result (integral graph area, ng) / sampling volume (0.03 m 3 ).

[0056] As mentioned above, it is only the preferred specific embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution and the inventive concept of the present utility model, makes equivalent substitutions or changes, and should be covered by the protection scope of the present utility model.

Claims

1. A vehicle air-conditioning refrigerant escape detection device, which is used to detect vehicle air-conditioning, characterized in that: include: Outer cabin (1); An inner cabin (2) is arranged inside the outer cabin (1), and the inner cabin (2) is used to place a vehicle air conditioner; A detector (11) for detecting refrigerant; An air collecting pipe (14) having activated carbon disposed therein, wherein one end of the air collecting pipe (14) is connected to the inner chamber (2) via a sampling pipe (9), and the other end of the air collecting pipe (14) is connected to the detector (11) via a detection pipe (13); A sampling pump (7) is arranged on the sampling pipe (9), and the sampling pump (7) extracts air from the inner chamber (2) and allows the air to enter the air collecting pipe (14); and a low-temperature tank (10), wherein the gas collecting pipe (14) is arranged inside the low-temperature tank (10) to reduce the temperature of the gas collecting pipe (14) and collect refrigerant.

2. The vehicle air conditioning refrigerant escape detection device according to claim 1, characterized in that: The cryogenic tank (10) is provided with a connecting pipe (15), the connecting pipe (15) being provided with a valve, and the connecting pipe (15) is used to inject liquid nitrogen into the interior of the cryogenic tank (10).

3. The vehicle air conditioning refrigerant escape detection device according to claim 1, characterized in that: A circulating air duct (201) is provided inside the inner cabin (2), a ventilation plate (4) is provided inside the inner cabin (2), a circulating fan (3) is provided on the rear side of the ventilation plate (4), and the circulating fan (3) causes the air inside the inner cabin (2) to circulate back and forth through the circulating air duct (201).

4. The vehicle air conditioning refrigerant escape detection device according to claim 1, characterized in that: A mounting seat (202) is provided inside the inner cabin (2), and the mounting seat (202) is used for mounting a vehicle air conditioner.

5. The vehicle air conditioning refrigerant escape detection device according to claim 1, characterized in that: A pressure balance bag (6) is provided on one side of the inner cabin (2), and the interior of the pressure balance bag (6) is filled with nitrogen.

6. The vehicle air conditioning refrigerant escape detection device according to claim 1, characterized in that: A sampling port (203) is provided on the inner chamber (2); one end of the sampling tube (9) is connected to the sampling port (203) and the other end thereof penetrates into the interior of the low-temperature tank (10).

7. The vehicle air conditioning refrigerant escape detection device according to claim 1, characterized in that: The sampling tube (9) is provided with a front valve (8), and the detection tube (13) is provided with a rear valve (12).

8. The vehicle air conditioning refrigerant escape detection device according to claim 1, characterized in that: It also includes a placement rack (1101), on which the detector (11) is placed.

9. The vehicle air conditioning refrigerant escape detection device according to claim 1, characterized in that: An inner cabin door (204) is provided on one side of the inner cabin (2), an observation window is provided on the inner cabin door (204), and a sealing ring is provided on the inner cabin door (204).

10. The vehicle air conditioning refrigerant escape detection device according to claim 1, characterized in that: An outer cabin door (101) is provided on one side of the outer cabin (1); an upper end of the outer cabin door (101) is rotatably connected to the outer cabin (1); a driving member (102) is provided between the outer cabin (1) and the outer cabin door (101) for driving the outer cabin door (101) to open and close; and a sealing ring is provided on the outer cabin door (101).

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