Supercooling pipe flow detection device

Abstract

The utility model relates to the technical field of air conditioners, in particular to a supercooling pipe flow detection device. The first pump body is suitable for pumping liquid; one end of the first pipeline is communicated with an outlet of the first pump body, and the other end of the first pipeline is communicated with a port of a to-be-detected supercooling pipe; and the flow meter is arranged on the first pipeline. The device for detecting the flow of the supercooling pipe provides a water detection mode for the flow consistency of the supercooling pipe, the flow consistency of the same batch of supercooling pipe groups in a factory is detected through high-pressure liquid, and the compressibility of the liquid is far smaller than that of gas, so that the detection accuracy can be improved.

Description

Technical Field

[0001] This utility model relates to the field of air conditioning technology, and in particular to a device for detecting the flow rate of a subcooling pipe. Background Technology

[0002] The function of the subcooling manifold in the air conditioning system is to throttle and reduce the pressure of the high-temperature, high-pressure refrigerant liquid into a low-temperature, low-pressure liquid. The refrigerant liquid flows through the subcooling manifold.

[0003] When testing the flow consistency of subcooled pipe assemblies, a gas detection method is generally used, which involves injecting high-pressure gas into the subcooled pipe assemblies. However, gas is highly compressible, so the accuracy of gas detection is relatively low. Utility Model Content

[0004] This invention provides a device for detecting the flow rate of subcooled pipes, which addresses one of the shortcomings of existing technologies. The device provides a water-based method for detecting the consistency of subcooled pipe flow rate by using high-pressure liquid to detect the flow rate consistency of subcooled pipe groups of the same batch in a factory. Since the compressibility of liquid is much less than that of gas, the accuracy of detection can be improved.

[0005] This utility model provides a device for detecting the flow rate of a subcooled pipe, comprising:

[0006] A first pump body, the first pump body being adapted to pump liquid;

[0007] The first pipeline has one end connected to the outlet of the first pump body and the other end connected to the port of the subcooled pipe to be tested.

[0008] A flow meter is installed in the first pipeline.

[0009] The subcooling pipe flow detection device provided by this utility model further includes:

[0010] A pressure stabilizing tank, which is connected to the first pipeline between the first pump body and the flow meter.

[0011] The subcooling pipe flow detection device provided by this utility model further includes:

[0012] The first interface is located at the end of the first pipeline and is adapted to be detachably connected to the port of the subcooled pipe to be tested.

[0013] The subcooling pipe flow detection device provided by this utility model further includes:

[0014] A drying assembly adapted to dry the interior of the subcooled tube to be tested after testing.

[0015] According to the present invention, a device for detecting the flow rate of a subcooled pipe is provided, wherein the drying assembly includes:

[0016] A second pump body, the second pump body being adapted to pump high-pressure gas;

[0017] The second pipeline has one end connected to the second pump body and the other end adapted to be connected to the port of the subcooled pipe to be tested.

[0018] According to the subcooling pipe flow detection device provided by this utility model, the drying assembly further includes:

[0019] A gas storage tank, which is connected to the second pipeline.

[0020] According to the subcooling pipe flow detection device provided by this utility model, the drying assembly further includes:

[0021] A heater, the heater being adapted to heat the intake air of the second pump body.

[0022] According to the subcooling pipe flow detection device provided by this utility model, the drying assembly further includes:

[0023] A third pipeline is connected to the inlet of the second pump body and is adapted to exchange heat with the first pump body.

[0024] According to the present invention, a device for detecting the flow rate of a subcooled pipe is provided, wherein the third pipe is adapted to first exchange heat with the first pump body and then exchange heat with the second pump body.

[0025] According to the subcooling pipe flow detection device provided by this utility model, the drying assembly further includes:

[0026] The second interface is located at the end of the second pipeline and is adapted to be detachably connected to the port of the subcooled pipe to be tested.

[0027] The device for detecting the flow rate of a subcooled pipe provided by this utility model mainly consists of a first pump body, a first pipeline and a flow meter. The first pipeline can connect the first pump body to the subcooled pipe to be tested. After the first pump body pressurizes the liquid, it pumps the high-pressure liquid into the subcooled pipe to be tested through the first pipeline. A flow meter is installed on the first pipeline, and the flow meter detects and reflects the flow rate of the liquid in real time.

[0028] The subcooled pipe flow detection device provides a water testing method for the consistency of subcooled pipe flow. It uses high-pressure liquid to detect the flow consistency of the same batch of subcooled pipe groups in the factory. The compressibility of liquid is much less than that of gas, so the accuracy of detection can be improved. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0030] Figure 1 This is one of the structural schematic diagrams of the device for measuring the flow rate of the subcooling tube provided in this embodiment of the utility model;

[0031] Figure 2 This is the second structural schematic diagram of the device for measuring the flow rate of the subcooling tube provided in this embodiment of the utility model.

[0032] Figure label:

[0033] 110. First pump body; 120. First pipeline; 130. Flow meter; 140. Pressure stabilizing tank; 150. First interface; 160. Return pipeline;

[0034] 200, Drying assembly; 210, Second pump body; 220, Second pipeline; 230, Air tank; 240, Third pipeline; 250, Second interface. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0036] In the description of the embodiments of this utility model, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0037] In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this utility model based on the specific circumstances.

[0038] In this embodiment of the utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0039] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above 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 one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0040] When testing the flow consistency of subcooled tube assemblies in the same batch, the factory generally uses a gas detection method. For example, high-pressure air of 0.2MPa is passed through the subcooled tube assembly, and the flow rate of the subcooled tube assembly is tested with the on-site sealed sample as a reference. The deviation range between the measured value and the value of the sealed sample is within ±0.2L / min, which meets the requirements, etc.

[0041] In reality, gases are highly compressible. Even if a 4mm process tube is fully inserted to the bottom of a 6mm connecting pipe, the flow area decreases by more than 60%, while the measured flow rate only decreases by 0.7%. This means the detected flow rate remains essentially unchanged, which is clearly incorrect. Only extremely severe blockages can be detected by gas detectors. Due to the compressibility of gases, the accuracy of gas detection methods for subcooled tube assemblies is relatively low.

[0042] The function of the subcooling manifold in the air conditioning system is to throttle and reduce the pressure of the high-temperature, high-pressure refrigerant liquid into a low-temperature, low-pressure liquid. The refrigerant liquid flows through the subcooling manifold.

[0043] like Figure 1 As shown, the subcooled pipe flow detection device provided in this embodiment of the present invention includes a first pump body 110, a first pipeline 120 and a flow meter 130. The first pump body 110 is suitable for pumping liquid; one end of the first pipeline 120 is connected to the outlet of the first pump body 110 and the other end is connected to the port of the subcooled pipe to be detected; the flow meter 130 is disposed in the first pipeline 120.

[0044] The subcooled pipe flow detection device of this utility model mainly consists of a first pump body 110, a first pipeline 120 and a flow meter 130. The first pipeline 120 can connect the first pump body 110 to the subcooled pipe to be detected. After the first pump body 110 pressurizes the liquid, it pumps the high-pressure liquid into the subcooled pipe to be detected through the first pipeline 120. The flow meter 130 is installed on the first pipeline 120. The flow meter 130 detects and reflects the flow rate of the liquid in real time.

[0045] The subcooled pipe flow detection device provides a water testing method for the consistency of subcooled pipe flow. It uses high-pressure liquid to detect the flow consistency of the same batch of subcooled pipe groups in the factory. The compressibility of liquid is much less than that of gas, so the accuracy of detection can be improved.

[0046] In this embodiment, the first pump body 110 is a liquid pressure pump, and the liquid can be water or a refrigerant used in the subcooling pipe.

[0047] According to one embodiment of the present invention, the device for detecting the flow rate of the subcooled pipe further includes a pressure stabilizing tank 140, which is connected to a first pipeline 120 between the first pump body 110 and the flow meter 130.

[0048] In this embodiment, the subcooled pipe flow detection device mainly consists of a first pump body 110, a first pipeline 120, a flow meter 130, and a pressure stabilizing tank 140. The first pipeline 120 connects the first pump body 110, the pressure stabilizing tank 140, the first flow meter 130, and the subcooled pipe to be tested in sequence. The first pump body 110 delivers liquid to the pressure stabilizing tank 140 through the first pipeline 120. After the high-pressure liquid stabilizes in the pressure stabilizing tank 140, it enters the subcooled pipe to be tested through the first pipeline 120. Thus, the first pump body 110 and the pressure stabilizing tank 140 can form a pressure stabilizing pump, making the pressure of the high-pressure liquid more stable. The liquid pressure pumped into the subcooled pipe to be tested remains relatively stable and consistent, which is beneficial to improving the accuracy of flow consistency detection. Using the pressure stabilizing tank 140 to store high-pressure liquid further improves the stability of the liquid pressure leading to the flow meter 130.

[0049] In this embodiment, the pressure stabilizing tank can be a 5L stainless steel tank with a built-in pressure sensor and pressure relief valve, which can stabilize the inlet water pressure at 2.5±0.1Mpa.

[0050] According to one embodiment of the present invention, the subcooled pipe flow detection device further includes a first interface 150, which is disposed at the end of the first pipe 120 and is adapted to be detachably connected to the port of the subcooled pipe to be detected.

[0051] In this embodiment, the subcooled pipe flow detection device mainly consists of a first pump body 110, a first pipeline 120, a flow meter 130, a pressure stabilizing tank 140, and a first interface 150. The first pipeline 120 connects the first pump body 110, the pressure stabilizing tank 140, the first flow meter 130, and the first interface 150 in sequence. The port of the subcooled pipe to be tested can be connected to the first pipeline 120 through the first interface 150. The first interface 150 and the port of the subcooled pipe to be tested are detachably connected, which facilitates the batch testing of the subcooled pipes to be tested and improves the testing efficiency.

[0052] In this embodiment, the first interface 150 may be a valve body. The valve body not only has the function of detachable connection, but also can control and adjust the opening degree, thereby adjusting the liquid flow rate. The first interface 150 may also be provided with a sealing component to ensure a tight connection during the connection with the port of the subcooled tube to be tested.

[0053] According to one embodiment of the present invention, the device for detecting the flow rate of the subcooled tube further includes a drying assembly 200, which is adapted to dry the inside of the subcooled tube to be tested after detection.

[0054] In this embodiment, the subcooled pipe flow detection device mainly consists of a first pump body 110, a first pipeline 120, a flow meter 130, a pressure stabilizing tank 140, a first interface 150, and a drying assembly 200. The first pipeline 120 connects the first pump body 110, the pressure stabilizing tank 140, the flow meter 130, and the first interface 150 in sequence to form the detection assembly of the subcooled pipe flow detection device. After the flow of the subcooled pipe to be tested is detected by the detection assembly, the qualified subcooled pipe is removed from the first interface 150 and connected to the drying assembly 200. By blowing air onto the subcooled pipe to be tested, the remaining liquid in the subcooled pipe is dried, which can avoid the problem of moisture residue in the subcooled pipe assembly, and then it can be stored for use.

[0055] According to one embodiment of the present invention, the drying assembly 200 includes a second pump body 210 and a second pipeline 220. The second pump body 210 is adapted to pump high-pressure gas; one end of the second pipeline 220 is connected to the second pump body 210, and the other end is adapted to be connected to the port of the subcooled tube to be tested.

[0056] In this embodiment, the drying assembly 200 mainly consists of a second pump body 210 and a second pipeline 220. The second pipeline 220 connects the second pump body 210 to the qualified subcooled tube. After the second pump body 210 pressurizes the gas, it pumps the high-pressure gas into the subcooled tube to be tested through the second pipeline 220. The high-pressure gas dries the liquid in the qualified subcooled tube. The high-pressure gas has a large flow rate, which can improve the drying efficiency.

[0057] In this embodiment, the second pump body 210 can be a gas pressure pump, and the gas can be air or other inert gas to avoid reaction with the refrigerant or the subcooling pipe when the liquid is the refrigerant.

[0058] According to one embodiment of the present invention, the drying assembly 200 further includes an air tank 230, which is connected to the second pipeline 220.

[0059] In this embodiment, the drying assembly 200 consists of a second pump body 210, a second pipeline 220, and a gas storage tank 230. The second pipeline 220 connects the second pump body 210, the gas storage tank 230, and the subcooled tube to be tested in sequence. The second pump body 210 delivers high-pressure gas to the gas storage tank 230 through the second pipeline 220. After the pressure of the high-pressure gas in the gas storage tank 230 stabilizes, it enters the subcooled tube to be tested through the second pipeline 220. Thus, the second pump body 210 and the gas storage tank 230 can form a pressure stabilizing pump, making the pressure of the high-pressure gas more stable. The gas pressure pumped into the subcooled tube to be tested remains relatively stable and consistent. The use of the gas storage tank 230 to store high-pressure gas further improves the stability of the gas pressure leading to the subcooled tube to be tested, achieving uniform blowing and drying effects.

[0060] In this embodiment, the gas storage tank can be a 10L carbon steel tank, equipped with a safety valve and a temperature sensor.

[0061] According to one embodiment of the present invention, the drying assembly 200 further includes a heater adapted to heat the air intake of the second pump body 210.

[0062] In this embodiment, the drying assembly 200 mainly consists of a second pump body 210, a second pipeline 220, a gas storage tank 230, and a heater. The subcooled tubes, after passing inspection, can be purged with high-pressure, high-temperature gas to dry the liquid within the subcooled tube assembly. Before the gas is compressed into high-pressure gas by the second pump body 210, it can be heated by the heater to raise its temperature. Then, the high-temperature gas is pressurized by the second pump body 210 to form high-pressure, high-temperature gas. The high-temperature gas further enhances the drying effect when drying the subcooled tubes, thereby increasing the drying speed and improving inspection efficiency.

[0063] Similarly, the heat source for the heater can come from a water pump or other large amounts of industrial waste heat present in the factory. Factories generally have a large amount of industrial waste heat, which can also be used to heat the air through pipelines, and then compressed by the second pump body 210 and stored in the air storage tank 230. The high temperature and high pressure air is easier to dry the subcooled pipe.

[0064] According to one embodiment of the present invention, the drying assembly 200 further includes a third pipe 240, which is connected to the inlet of the second pump body 210 and is adapted to exchange heat with the first pump body 110.

[0065] In this embodiment, the drying assembly 200 mainly consists of a third pipe 240, a second pump body 210, a second pipe 220, and a gas storage tank 230. The third pipe 240 is connected to the inlet of the second pump body 210. Gas is drawn into the second pump body 210 through the third pipe 240 for compression. The gas first exchanges heat with the first pump body 110 through the third pipe 240. When the first pump body 110 is working, its temperature rises. The third pipe 240 can serve as a cooling device for the first pump body 110. The gas in the third pipe 240 can carry away the heat of the first pump body 110, promoting the heat dissipation and cooling of the first pump body 110 while also increasing the temperature of the gas to be pressurized.

[0066] According to one embodiment of the present invention, the third pipeline 240 is adapted to first exchange heat with the first pump body 110 and then exchange heat with the second pump body 210.

[0067] In this embodiment, the third pipeline 240 can exchange heat with the first pump body 110 and the second pump body 210 successively. That is, the gas first exchanges heat with the first pump body 110 through the third pipeline 240, and then exchanges heat with the second pump body 210. The temperature of both the first pump body 110 and the second pump body 210 increases during operation. The third pipeline 240 can serve as a cooling device for the first pump body 110 and the second pump body 210. The gas in the third pipeline 240 can carry away the heat from the first pump body 110 and the second pump body 210, promoting the heat dissipation and cooling of the first pump body 110 and the second pump body 210, while also increasing the temperature of the gas to be pressurized.

[0068] In this embodiment, both the second pipeline 220 and the third pipeline 240 are made of high-temperature resistant pipes, such as high-temperature resistant flexible hoses with an inner diameter of 8mm and an outer heat insulation layer, to ensure the durability of the pipes and the reliability of the structure in the drying assembly 200 when high-temperature and high-pressure gas passes through.

[0069] According to one embodiment of the present invention, the drying assembly 200 further includes a second interface 250, which is disposed at the end of the second pipe 220 and is adapted to be detachably connected to the port of the subcooled pipe to be tested.

[0070] In this embodiment, the drying assembly 200 mainly consists of a third pipeline 240, a second pump body 210, a second pipeline 220, an air storage tank 230, and a second interface 250. The second pipeline 220 connects the second pump body 210, the air storage tank 230, and the second interface 250 in sequence. The port of the subcooled tube to be tested can be connected to the second pipeline 220 through the second interface 250. The second interface 250 and the port of the subcooled tube to be tested are detachably connected, which facilitates the batch drying of the subcooled tubes to be tested and improves the testing efficiency and warehousing efficiency.

[0071] In this embodiment, the second interface 250 can be a valve body. The valve body not only has the function of detachable connection, but also can control and adjust the opening degree, thereby regulating the gas flow rate. The second interface 250 can also be provided with a sealing component to ensure a tight connection during the connection with the port of the subcooled tube to be tested.

[0072] like Figure 2 As shown, according to one embodiment of the present invention, the subcooling pipe flow detection device further includes a return pipe 160, which is adapted to connect the liquid outlet port of the subcooling pipe to be detected to the inlet of the first pump body 110.

[0073] In this embodiment, the inlet port of the subcooled tube to be tested is connected to the first interface 150, and the outlet port of the subcooled tube to be tested is connected to one end of the return pipe 160. The high-pressure liquid pumped into the pressure stabilizing tank 140 by the first pump body 110 enters the subcooled tube to be tested through the inlet port and flows out of the outlet port of the subcooled tube to the return pipe 160. The inlet of the first pump body 110 is connected to the inlet pipe, and the other end of the return pipe 160 is connected to the inlet pipe. Thus, the liquid used for testing is transported back to the inlet pipe after flowing out of the subcooled tube to be tested, and then flows back into the first pump body 110 from the inlet pipe. This realizes liquid recovery and avoids the waste of water and other liquid resources.

[0074] In this embodiment, the first pump body 110 and the second pump body 210 can be selected as pneumatic diaphragm pumps or plunger pumps to adapt to liquids and gases of different viscosities, and the heater can be selected as an infrared radiation heater or an electromagnetic induction heater.

[0075] The method for detecting the flow rate of the subcooled pipe provided by this utility model is described below. The method for detecting the flow rate of the subcooled pipe described below can be referred to in correspondence with the device for detecting the flow rate of the subcooled pipe described above.

[0076] This utility model embodiment also provides a method for detecting the flow rate of a subcooling pipe, applied to the subcooling pipe flow rate detection device as described in the above embodiment, comprising:

[0077] Pump high-pressure liquid into the subcooled pipe to be tested and record the actual flow rate of flow meter 130.

[0078] If the difference between the actual flow rate and the set flow rate is less than or equal to the target difference, high-pressure gas is pumped into the subcooled pipe to be tested to dry it.

[0079] The method for detecting the flow rate of a subcooled pipe according to this embodiment of the invention involves connecting the port of the subcooled pipe to be tested to the first interface 150, controlling the start of the first pump body 110, pressurizing the liquid through the first pump body 110 and delivering it to the pressure stabilizing tank 140 through the first pipeline 120, stabilizing the pressure of the high-pressure liquid in the pressure stabilizing tank 140, and then discharging it into the subcooled pipe to be tested through the first pipeline 120 to the first interface 150. When the high-pressure liquid flows out of the pressure stabilizing tank 140, it passes through the flow meter 130, which reflects the actual flow rate of the liquid in real time. The method then determines the relationship between the difference between the actual flow rate and the set flow rate and the target difference. If the actual flow rate and the set flow rate are different, the method is called a flow meter. If the difference in flow rate is less than or equal to the target difference, it proves that the flow rate consistency of the subcooled tube under test meets the requirements, and the current subcooled tube under test is a qualified part. The subcooled tube under test is removed from the first interface 150 and connected to the second interface 250. The second pump body 210 is turned on. The second pump body 210 draws in gas through the third pipeline 240 and compresses it to form high-pressure gas. The gas is then input into the gas storage tank 230 through the second pipeline 220. After the high-pressure gas is stabilized in the gas storage tank 230, it is pumped into the subcooled tube under test through the second pipeline 220. The high-pressure gas dries the residual liquid squeezed in the subcooled tube under test.

[0080] The method for detecting the flow rate of subcooled pipes provides a water-based testing method for the consistency of subcooled pipe flow rates. It uses high-pressure liquid to detect the flow rate consistency of subcooled pipe assemblies from the same batch in the factory. Since the compressibility of liquid is much less than that of gas, the accuracy of the test can be improved.

[0081] In this embodiment, the set flow rate and the target flow rate in the controller are both preset parameters. The controller can analyze and process the actual flow rate detected by the flow meter 130 to obtain the difference between it and the set flow rate, and then compare the difference with the target difference.

[0082] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A device for detecting the flow rate of a subcooled pipe, characterized in that, include; A first pump body (110) is adapted to pump liquid; The first pipeline (120) has one end connected to the outlet of the first pump body (110) and the other end connected to the port of the subcooled pipe to be tested. A flow meter (130) is installed in the first pipeline (120).

2. The device for detecting the flow rate of the subcooled pipe according to claim 1, characterized in that, Also includes: A pressure stabilizing tank (140) is connected to the first pipeline (120) between the first pump body (110) and the flow meter (130).

3. The device for detecting the flow rate of the subcooled pipe according to claim 1, characterized in that, Also includes: The first interface (150) is located at the end of the first pipeline (120) and is adapted to be detachably connected to the port of the subcooled pipe to be tested.

4. The device for detecting the flow rate of the subcooled pipe according to any one of claims 1 to 3, characterized in that, Also includes: A drying assembly (200) is adapted to dry the interior of the supercooled tube to be tested after testing.

5. The device for detecting the flow rate of the subcooling pipe according to claim 4, characterized in that, The drying assembly (200) includes: The second pump body (210) is adapted to pump high-pressure gas; The second pipeline (220) has one end connected to the second pump body (210) and the other end adapted to be connected to the port of the subcooled pipe to be tested.

6. The device for detecting the flow rate of the subcooling pipe according to claim 5, characterized in that, The drying assembly (200) further includes: Gas storage tank (230), which is connected to the second pipeline (220).

7. The device for detecting the flow rate of the subcooling pipe according to claim 5, characterized in that, The drying assembly (200) further includes: A heater adapted to heat the intake air of the second pump body (210).

8. The device for detecting the flow rate of the subcooling pipe according to claim 5, characterized in that, The drying assembly (200) further includes: A third pipe (240) is connected to the inlet of the second pump body (210) and is adapted to exchange heat with the first pump body (110).

9. The device for detecting the flow rate of the subcooling pipe according to claim 8, characterized in that, The third pipeline (240) is adapted to first exchange heat with the first pump body (110) and then exchange heat with the second pump body (210).

10. The device for detecting the flow rate of the subcooling pipe according to claim 5, characterized in that, The drying assembly (200) further includes: The second interface (250) is located at the end of the second pipe (220) and is adapted to be detachably connected to the port of the subcooled pipe to be tested.

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