Detection device and refrigerant leakage detection system

Abstract

The utility model relates to a detection device and a refrigerant leakage detection system, the detection device comprises a pipeline assembly, an air source assembly and a buffer chamber, and the pipeline assembly is used for communicating with an internal cavity of a to-be-detected part; the air source assembly is connected with the pipeline assembly and is used for inflating or deflating the inner cavity of the to-be-detected piece; the buffer chamber is communicated between the air source assembly and the pipeline assembly. According to the detection device provided by the invention, the air source assembly is connected with the pipeline assembly, so that the internal cavity of the to-be-detected part is inflated or deflated in the detection process. The buffer chamber is communicated between the air source assembly and the pipeline assembly, airflow can be buffered through the buffer chamber, the change rate of the flow speed in the pipeline assembly can be slowed down, and therefore the air pressure in the pipeline assembly and the air pressure in the inner cavity are stably and gradually changed; therefore, the deformation, fracture or damage of the to-be-detected piece caused by the large instantaneous inflation air pressure or exhaust air pressure in the pipeline assembly and the inner cavity of the to-be-detected piece can be avoided.

Description

Technical Field

[0001] This application relates to the field of detection technology, and in particular to a detection device and a refrigerant leakage detection system. Background Technology

[0002] During the production and use of products, sealing performance is one of the key performance indicators for many products (such as containers, pipes, and electronic equipment housings). If a product has sealing defects, it will lead to leakage, failure, or premature damage during use, which will seriously affect the reliability and service life of the product.

[0003] Taking the heat exchange pipe in an air conditioner heat exchanger as an example, since the refrigerant flows in the heat exchange pipe, in order to avoid refrigerant leakage, the pipe wall is required to have good sealing performance. Once there are tiny cracks or gaps in the pipe wall, the flammable refrigerant inside the heat exchange pipe will leak, and in severe cases, it may even cause an explosion.

[0004] Existing sealing performance testing devices typically connect an air pump directly to the internal cavity of the component under test (such as a heat exchange pipe) through a pipeline. The air pump inflates or deflates the internal cavity of the component under test. However, after the air pump is started, the air pressure in the pipeline and inside the component under test changes rapidly. When the instantaneous inflation pressure (positive pressure) or deflating pressure (negative pressure) generated by the air pump exceeds the withstand limit of the component under test, it may cause the component under test to deform, crack, or be damaged. Utility Model Content

[0005] This application provides a detection device and a refrigerant leakage detection system to solve the technical problem in the prior art that when the test piece is filled or evacuated by an air pump and pipeline, the test piece is easily deformed, cracked or damaged due to rapid pressure changes.

[0006] In a first aspect, this application provides a detection device, comprising:

[0007] Piping assembly, used to communicate with the internal cavity of the part to be tested;

[0008] The air supply assembly is connected to the pipeline assembly and is used to pressurize or depress the internal cavity of the test piece.

[0009] The buffer chamber connects the gas source assembly and the piping assembly.

[0010] Optionally, the cross-sectional area of ​​the buffer chamber is larger than the cross-sectional area of ​​the piping assembly.

[0011] Optionally, the buffer chamber has an openable vent.

[0012] Optionally, a sealing component is provided at the vent.

[0013] Optionally, a filter assembly is provided at the ventilation section.

[0014] Optionally, the piping assembly includes a first piping and a second piping, which are respectively connected to the internal cavity of the component to be tested.

[0015] Optionally, both the first and second pipelines are flexible pipelines.

[0016] Optionally, both the first and second pipelines are provided with connecting parts at their ends, which are used to achieve a sealed connection with the part to be tested.

[0017] Optionally, the connection may include a connecting flange or a quick coupling.

[0018] Optionally, the first pipeline is connected between the gas source assembly and the device under test, and the second pipeline is connected between the buffer chamber and the device under test.

[0019] Optionally, valves are provided on both the first and second pipelines, and pressure detection devices are provided on the first and / or second pipelines.

[0020] Optionally, the air source assembly includes an air pump, a first air pipe, and a second air pipe, both of which are connected to the air pump, and the first air pipe and / or the second air pipe are in communication with the buffer chamber.

[0021] Optionally, the detection device also includes a main body, with a gas source assembly and a buffer chamber disposed inside the main body, and some pipeline assemblies extending out of the main body;

[0022] The bottom of the main body of the device is equipped with a movable component.

[0023] Secondly, this application provides a refrigerant leak detection system, including the detection device provided in the first aspect of this application, and also including a test piece having an internal cavity for containing refrigerant.

[0024] The technical solutions provided in this application have the following advantages compared with the prior art:

[0025] The testing device provided in this application connects the gas source assembly and the pipeline assembly to facilitate the inflation or deflation of the internal cavity of the test piece during the testing process, thereby ensuring that the gas pressure in the internal cavity reaches the preset pressure required for the test. A buffer chamber is connected between the gas source assembly and the pipeline assembly. During the startup of the gas source assembly, the airflow can be buffered through the buffer chamber, which can slow down the rate of change of flow velocity inside the pipeline assembly, making the flow velocity change more stable. This results in a stable and gradual change of gas pressure in the pipeline assembly and the internal cavity of the test piece, avoiding large instantaneous inflation or deflation pressures in the pipeline assembly and the internal cavity of the test piece, which could lead to deformation, cracking, or damage to the test piece.

[0026] The refrigerant leakage detection system and method provided in this application include the above-mentioned detection device, which can buffer the airflow through the buffer chamber, and naturally has the technical effects of the above-mentioned detection device. Attached Figure Description

[0027] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0028] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0030] Figure 1 Partial cross-section of the detection device provided in the embodiments of this application. Figure 1 ;

[0031] Figure 2 Provided for the embodiments of this application Figure 1 Enlarged detail of section A;

[0032] Figure 3 Partial cross-section of the detection device provided in the embodiments of this application. Figure 2 ;

[0033] Figure 4 A front view of the first connecting portion provided in an embodiment of this application;

[0034] Figure 5This is a schematic diagram of the refrigerant leak detection system provided in an embodiment of this application;

[0035] Figure 6 The detection principle of the detection device provided in the embodiments of this application Figure 1 ;

[0036] Figure 7 The detection principle of the detection device provided in the embodiments of this application Figure 2 ;

[0037] Figure 8 A flowchart of the detection method provided in the embodiments of this application.

[0038] Explanation of reference numerals in the attached figures:

[0039] 1. Piping assembly; 11. First pipeline; 12. Second pipeline; 13. First connection part; 131. Flange body; 132. Connection hole; 133. Sealing ring; 14. Second connection part; 15. First valve; 16. First pressure sensing element; 17. Second valve; 18. Second pressure sensing element;

[0040] 2. Air source assembly; 21. Air pump; 22. First air pipe; 23. Second air pipe;

[0041] 3. Buffer chamber; 31. Ventilation section; 311. Vent hole; 312. Sealing cover; 32. Sealing assembly; 33. Filter assembly;

[0042] 4. Main body of the device;

[0043] 5. Moving components;

[0044] 6. Control components;

[0045] 7. Item to be tested; 71. Internal cavity. Detailed Implementation

[0046] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0047] The following disclosure provides numerous different embodiments or examples for implementing various structures of this application. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed.

[0048] For ease of description, spatial relative terms may be used in the text to describe the relative position or movement of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "front," "back," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, other than those depicted in the figure. For example, if the device in the figure undergoes a positional flip, orientation change, or change of motion, these directional indications will change accordingly. For instance, an element described as "below other elements or features" or "below other elements or features" will subsequently be oriented "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions), and the spatial relative descriptors used in the text will be interpreted accordingly.

[0049] To address the technical problem in the prior art where rapid pressure changes during inflation or deflation of the test piece 7 via the air pump 21 and pipelines can easily lead to deformation, cracking, or damage of the test piece 7, this application provides a detection device and a refrigerant leakage detection system. This detection device connects the buffer chamber 3 between the air source assembly 2 and the pipeline assembly 1, which can buffer the airflow generated by the air source assembly 2, thereby causing a stable and gradual change in the air pressure inside the pipeline assembly 1. This can prevent the air source assembly 2 from generating large instantaneous inflation or deflation pressures during inflation or deflation, and prevent deformation, cracking, or damage to the test piece 7 connected to the pipeline assembly 1.

[0050] Please see Figures 1 to 8 The first aspect of this application provides a testing device, including a pipeline assembly 1, a gas source assembly 2, and a buffer chamber 3. The pipeline assembly 1 is used to communicate with the internal cavity 71 of the component 7 to be tested. The gas source assembly 2 is connected to the pipeline assembly 1 and is used to inflate or depressurize the internal cavity 71 of the component 7 to be tested, so as to inflate or depressurize the internal cavity 71 of the component 7 to be tested during the sealing performance test, thereby making the gas pressure value of the internal cavity 71 reach the preset gas pressure required for the test. Figure 1 and Figure 5 As shown.

[0051] The buffer chamber 3 is connected between the air source assembly 2 and the pipeline assembly 1. During the start-up process of the air source assembly 2, the airflow can be buffered by the buffer chamber 3, which can slow down the rate of change of the flow velocity inside the pipeline assembly 1, making the flow velocity change more stable. This allows the air pressure in the pipeline assembly 1 to change steadily and gradually, avoiding large instantaneous inflation or deflation pressure in the pipeline assembly 1 and the internal cavity 71 of the test piece 7, which could cause deformation, cracking or damage to the test piece 7.

[0052] In some embodiments of this application, when the internal cavity 71 is inflated by the air source assembly 2, the high-speed, high-pressure airflow output from the air source assembly 2 enters the buffer chamber 3. After the airflow pressure and velocity are reduced in the buffer chamber 3, it enters the internal cavity 71 of the test piece 7 through the pipeline assembly 1. During the inflation process, due to the buffering effect of the buffer chamber 3, the airflow output from the pipeline assembly 1 to the test piece 7 can be made stable, which can avoid the occurrence of large positive pressure in the pipeline assembly 1 and the internal cavity 71, and prevent the test piece 7 from expanding and rupturing. Thus, the air pressure in the internal cavity 71 of the test piece 7 is steadily increased to the preset air pressure (positive pressure).

[0053] In other embodiments of this application, when air is drawn from the internal cavity 71 by the air source assembly 2, the air source assembly 2 first draws airflow from the buffer chamber 3, and then the airflow in the pipeline assembly 1 and the internal cavity 71 slowly flows into the buffer chamber 3. This avoids large negative pressure in the pipeline assembly 1 and the internal cavity 71, and prevents the test piece 7 from collapsing and deforming. The air pressure in the internal cavity 71 of the test piece 7 gradually decreases until it reaches the preset air pressure (negative pressure).

[0054] In some embodiments of this application, please refer to Figure 1 , Figure 6 and Figure 7 The cross-sectional area of ​​the buffer chamber 3 is larger than that of the pipe in the pipe assembly 1, thus giving the buffer chamber 3 a larger volume. The larger volume means that the buffer chamber 3 can hold more fluid, thereby more effectively balancing the pressure pulsation in the pipe assembly 1 and playing a more effective airflow buffering role.

[0055] It should be noted that the shape formed by the inner wall of the buffer chamber 3 can be a cuboid, a sphere, a capsule, etc., all of which can achieve the purpose of this application. In some preferred embodiments of this application, the cross-sectional area of ​​the buffer chamber 3 is more than 5 times the cross-sectional area of ​​the pipeline assembly 1, which can better absorb and mitigate the vibration caused by fluid pressure pulsation, help reduce the vibration of the pipeline assembly 1 and the system, and reduce aerodynamic noise.

[0056] In some embodiments of this application, please refer to Figure 1 , Figure 2 and Figure 5 The buffer chamber 3 has an openable vent 31, which allows the buffer chamber 3 and the entire piping system to be connected to the atmosphere during or after testing, restoring the air pressure of the entire piping system to atmospheric pressure. This avoids the problem of difficulty in disassembling the connection between the piping assembly 1 and the test piece 7 due to large positive or negative pressure. At the same time, since the internal cavity 71 of the test piece 7 may contain refrigerant or other substances, this prevents refrigerant from spraying out from the connection between the piping assembly 1 and the test piece 7 due to excessive internal pressure during disassembly, thus avoiding a safety accident.

[0057] In some embodiments of this application, please refer to Figure 2 The ventilation section 31 includes a ventilation hole 311 communicating with the buffer chamber 3. An openable and closable sealing cover 312 is provided on the outside of the ventilation hole 311. The sealing cover 312 can be installed on the outside of the ventilation hole 311 by means of hinge, threaded connection or other means. As long as the sealing cover 312 is closed, the ventilation hole 311 can be blocked, so that there is no air leakage in the ventilation hole 311 and the ventilation section 31, thus achieving the purpose of this application.

[0058] In some embodiments of this application, please refer to Figure 1 and Figure 2 A sealing component 32 is provided at the venting section 31 to ensure the sealing performance of the venting section 31, thereby ensuring the sealing performance of the buffer chamber 3. When the venting section 31 is closed, the airflow inside the buffer chamber 3 can only flow between the air source component 2 and the pipeline component 1, which can improve the sealing performance and reliability of the buffer chamber 3 itself.

[0059] In some embodiments of this application, please refer to Figure 2 The sealing component 32 is disposed on the sealing cover 312. The sealing component 32 includes one or more sealing rings 133, which can be used to achieve a circumferential seal between the sealing cover 312 and the vent 311.

[0060] In some embodiments of this application, please refer to Figure 1 and Figure 2 The ventilation section 31 is equipped with a filter assembly 33, which can prevent the refrigerant and other substances remaining in the test piece 7 from being discharged into the atmosphere, thus improving the environmental performance of the testing device; it can also prevent external impurities from entering the buffer chamber 3 and the test piece 7 through the ventilation hole 311, thus improving the reliability of the testing device.

[0061] It should be noted that the filter assembly 33 can be configured as needed. When there are no harmful substances in the internal cavity 71 of the test piece 7, the filter assembly 33 may only include a dust filter; while when harmful substances may remain in the internal cavity 71 of the test piece 7, the filter assembly 33 may include an activated carbon filter or a targeted adsorption filter, etc.

[0062] In the above embodiments, the test piece 7 can be inflated or deflated through a single pipeline. However, with the buffer chamber 3 in place, there is a problem of low inflation or deflating efficiency.

[0063] To address the aforementioned issues, please refer to some embodiments of this application. Figure 1 , Figure 3 and Figure 5 The pipeline assembly 1 includes a first pipeline 11 and a second pipeline 12. The first pipeline 11 and the second pipeline 12 are respectively connected to the internal cavity 71 of the test piece 7. They can simultaneously perform inflation or deflation operations on the internal cavity 71 of the test piece 7, thereby improving inflation efficiency or deflation efficiency and thus improving the detection efficiency of the detection device.

[0064] In some embodiments of this application, the first pipe 11 and the second pipe 12 are respectively connected to the two ends of the internal cavity 71, which can simultaneously inflate or de-inflate the internal cavity 71, thereby increasing the inflation or de-inflation efficiency by more than 40%, which is beneficial for shortening the detection time and improving the detection efficiency of the detection device.

[0065] In some embodiments of this application, please refer to Figure 3 Both the first pipe 11 and the second pipe 12 are flexible pipes with deformation capability, so as to realize the connection position and connection orientation between the first pipe 11 and the second pipe 12 and the test piece 7. When there is a distance or deviation between the interface positions of the internal cavity 71 on the test piece 7, the connection between the pipe assembly 1 and the interface of the internal cavity 71 can be realized by the deformation of the first pipe 11 and the second pipe 12.

[0066] In some embodiments of this application, please refer to Figure 3 Both the first pipe 11 and the second pipe 12 are corrugated pipes, which have good expansion and contraction capabilities and can easily cope with various bends, twists and folds during installation and use, greatly reducing assembly difficulty and cost; they can adapt to the interface position of the internal cavity 71 on different types of test pieces 7, so that the testing device can adapt to the sealing performance testing of test pieces 7 of different models and sizes, improving the flexibility and versatility of the testing device.

[0067] In some other embodiments of this application, the first pipe 11 and the second pipe 12 are both rubber pipes, which have good elastic deformation ability and excellent wear resistance, and can improve the service life of the pipe assembly 1.

[0068] In some embodiments of this application, please refer to Figure 1 , Figure 3 and Figure 4 Both the first pipe 11 and the second pipe 12 are provided with connecting parts at their ends. The connecting parts are used to achieve a sealed connection with the part to be tested 7. This enables the pipe assembly 1 to communicate with the internal cavity 71 of the part to be sealed, while preventing airflow leakage from the connecting parts. This can improve the accuracy and reliability of the sealing performance test results.

[0069] In some embodiments of this application, please refer to Figure 1 and Figure 2 The end of the first pipe 11 is provided with a first connecting part 13 for connecting with the test piece 7; the end of the second pipe 12 is provided with a second connecting part 14 for connecting with the test piece 7, and the shapes of the first connecting part 13 and the second connecting part 14 are set according to the interface shape of the internal cavity 71 of the test piece 7.

[0070] In some embodiments of this application, since the interface shape of the internal cavity 71 of the component to be tested 7 is typically a standard interface, please refer to [link to relevant documentation]. Figure 1 , Figure 3 and Figure 4 The connection part includes a connecting flange, which can be used to quickly connect the first pipeline 11 or the second pipeline 12 to the test piece 7, thereby improving the versatility of the testing device.

[0071] In some embodiments of this application, please refer to Figure 1 , Figure 3 and Figure 4 The first connecting part 13 and the second connecting part 14 have the same shape and both include a connecting flange. The connecting flange includes a flange body 131, and the flange body 131 is provided with a connecting hole 132 and a sealing ring 133. The sealing ring 133 is used to achieve a seal between the interface between the connecting flange and the internal cavity 71. The connecting hole 132 is used to achieve a detachable connection between the interface between the connecting flange and the internal cavity 71. The connecting hole 132 is located outside the sealing ring 133, which can block the airflow inside the sealing ring 133 and prevent the airflow in the pipeline from leaking through the connecting hole 132.

[0072] In some other embodiments of this application, the connecting part includes a quick connector, which can achieve a quick connection between the interface of the first pipe 11 or the second pipe 12 and the internal cavity 71 by means of insertion and removal, thereby improving the efficiency of disassembly and assembly between the pipe assembly 1 and the component under test 7. The quick connector can be a mature product in the prior art, as long as it can achieve a sealed connection between the pipe assembly 1 and the component under test 7, the purpose of this application can be achieved.

[0073] In the above embodiments, when the piping assembly 1 includes a first piping 11 and a second piping 12, the buffer chamber 3 can be connected to one of the first piping 11 and the second piping 12, or it can be connected to both the first piping 11 and the second piping 12 simultaneously, both of which can achieve the purpose of this application. Figure 6 and Figure 7 As shown.

[0074] Please refer to some preferred embodiments of this application. Figure 1 , Figure 3 and Figure 6 The first pipeline 11 is connected between the air source assembly 2 and the test piece 7, and the second pipeline 12 is connected between the buffer chamber 3 and the test piece 7. Compared with both pipelines being connected to the buffer chamber 3, the number of pipeline connection points can be reduced, the assembly and connection process can be reduced, and the risk of air leakage of the test pipeline itself can be reduced.

[0075] It should be noted that since the air source assembly 2, pipeline assembly 1, the test piece 7 and the buffer chamber 3 are connected to form a sealed airflow channel, when one of the first pipeline 11 and the second pipeline 12 is connected to the buffer chamber 3, the airflow in the entire airflow channel can be buffered through the buffer chamber 3.

[0076] In some embodiments of this application, please refer to Figure 1 , Figure 6 and Figure 7 Both the first pipe 11 and the second pipe 12 are equipped with valves to control the airflow and on / off state of the air in the first pipe 11 and the second pipe 12. During inflation and deflation, the airflow can be regulated by the valves, thereby causing a stable change in the air pressure of the internal cavity 71 of the component under test 7. During the test, the internal cavity 71 can be pressure-maintained by closing the valves, so that the sealing performance of the component under test 7 can be judged by the subsequent pressure changes in the internal cavity 71.

[0077] In some embodiments of this application, a first valve 15 is provided on the first pipeline 11 and a second valve 17 is provided on the second pipeline 12. The first valve 15 and the second valve 17 can be valves such as regulating valves and butterfly valves. The driving method of the first valve 15 and the second valve 17 is preferably electric drive or electromagnetic drive, which is beneficial to realize intelligent control of pipeline assembly 1 and detection device.

[0078] In some embodiments of this application, pressure detection elements are provided on the first pipeline 11 and / or the second pipeline 12. Since the first pipeline 11, the second pipeline 12 and the internal cavity 71 of the component to be tested 7 are connected, the pressure detection elements provided on the first pipeline 11 and / or the second pipeline 12 can be used to detect the pressure of the internal cavity 71.

[0079] In some embodiments of this application, please refer to Figure 1 , Figure 6 and Figure 7 A first pressure sensor 16 is installed on the first pipeline 11, and a second pressure sensor 18 is installed on the second pipeline 12. Both the first pressure sensor 16 and the second pressure sensor 18 are located between the first valve 15 and the second valve 17. Since the first pipeline 11, the internal cavity 71 of the component under test 7, and the second pipeline 12 are in a connected state when the first valve 15 and the second valve 17 are closed, the internal air pressure of the three is the same. The first pressure sensor 16 and the second pressure sensor 18 can be compared to confirm whether there is any abnormality in them, which can improve the reliability of the detection results of the detection device. If the readings of the first pressure sensor 16 and the second pressure sensor 18 are the same, it means that the readings of the first pressure sensor 16 and the second pressure sensor 18 are normal. If the readings of the first pressure sensor 16 and the second pressure sensor 18 are different, it means that the first pressure sensor 16 and / or the second pressure sensor 18 are abnormal and need to be repaired.

[0080] In some embodiments of this application, please refer to Figure 1 , Figure 6 and Figure 7 The air source assembly 2 includes an air pump 21, a first air pipe 22, and a second air pipe 23. Both the first air pipe 22 and the second air pipe 23 are connected to the air pump 21 and can be used to connect to the first pipeline 11 and the second pipeline 12 respectively, thereby forming two inflation pipelines or two suction pipelines. The first air pipe 22 and / or the second air pipe 23 are connected to the buffer chamber 3, which can buffer the inflation airflow or suction airflow of the air pump 21.

[0081] In some embodiments of this application, please refer to Figure 1 and Figure 6The first trachea 22 is directly and sealed to the first conduit 11, the second trachea 23 is sealed to the buffer chamber 3, and the buffer chamber 3 is sealed to the second conduit 12. The buffer chamber 3 serves as an intermediate link between the second trachea 23 and the second conduit 12, acting as a buffer zone to reduce the impact of external factors on the test results. Simultaneously, the buffer chamber 3 expands the connectable area of ​​the second conduit 12, making the connection between the second trachea 23 and the second conduit 12 more flexible. In different testing environments, the position and shape of the buffer chamber 3, as well as the connection position between the buffer chamber 3 and the second conduit 12, can be adjusted to meet different testing needs.

[0082] In some embodiments of this application, please refer to Figure 1 , Figure 2 , Figure 3 and Figure 5 The testing device also includes a main body 4, an air source assembly 2 and a buffer chamber 3 located inside the main body 4, and a portion of the pipeline assembly 1 extending out of the main body 4 to facilitate connection with the test piece 7 outside the main body 4. By placing the air source assembly 2, the buffer chamber 3 and the pipeline assembly 1 on the main body 4, the various components of the testing device can be assembled into a whole, facilitating the overall movement of the testing device according to testing requirements.

[0083] The bottom of the main body 4 of the device is equipped with a movable component 5, which makes the entire detection device easy to move. It allows the detection personnel to move the detection device to any location where the detection is required, improving the ease of use of the detection device and significantly improving the convenience and efficiency of the detection.

[0084] It should be noted that the moving component 5 can be a moving structure such as a roller, track, or slide rail, all of which can achieve the purpose of this application. In some preferred embodiments of this application, the moving component 5 is a roller assembly, which eliminates the need to set up moving tracks inside the factory area, improves the mobility of the testing device, and helps to reduce the production cost and weight of the testing device.

[0085] In some embodiments of this application, please refer to Figure 1 The main body 4 of the device has two chambers inside. One chamber is configured as a buffer chamber 3, and the other chamber is configured as the installation chamber for the air source assembly 2. The first air pipe 22 passes through the side wall of the installation chamber and connects to the first pipeline 11. The second air pipe 23 passes through the side wall between the installation chamber and the buffer chamber 3 and communicates with the buffer chamber 3. The second air pipe 23 and the buffer chamber 3 are sealed to prevent the installation chamber from communicating with the buffer chamber 3 and affecting the sealing performance of the buffer chamber 3 itself.

[0086] It should be noted that the installation chamber and buffer chamber 3 can be arranged vertically or horizontally, depending on the interface positions of the first pipeline 11, the second pipeline 12 and the component to be tested 7. No limitation is made here.

[0087] In some embodiments of this application, the device body is further provided with a control component 6, which can realize signal connection with the gas source component 2, valve and pressure detection component, realize start and stop control of gas source component 2 and valve, and display pressure detection information of pressure detection component through control plane of control component 6, so as to make the detection process more efficient, accurate and intelligent.

[0088] It should be noted that the testing device of this application can be used to test any product that requires testing its sealing performance, such as containers, pipes, and shell components. The buffer chamber 3 improves the pressure stability of the airflow during inflation or deflation in the testing device; the valves and pressure sensors allow for precise control of the airflow pressure, ensuring the reliability of the pressure setting during testing. The display screen of the control component 6 can display the pressure values ​​monitored by the pressure sensors in the first pipe 11 and the second pipe 12 (i.e., the internal cavity 71) in real time, helping technicians to promptly identify and address potential leaks.

[0089] The detection device of this application improves detection accuracy and reduces the possibility of misjudgment through precise and stable pressure control and real-time pressure monitoring. The automatic control of the air pump 21 and valves by the control component 6 makes the detection process more efficient.

[0090] The flexibility of the first pipe 11 and the second pipe 12, along with the versatility of their connections, allows the testing device to adapt to different types of test pieces 7, improving the flexibility and applicability of the testing. The buffer chamber 3 is designed with a vent 31, facilitating venting after testing and enhancing testing safety.

[0091] In refrigeration equipment, refrigerant circulates between components such as the compressor, condenser, and evaporator to achieve the functions of condensation heat release in the condenser and evaporation heat absorption in the evaporator. Once refrigerant leaks, even the smallest leak can lead to a decrease in system performance or even damage to the refrigeration equipment. Therefore, regular refrigerant leak detection is a key step to ensure the normal operation of the air conditioning system.

[0092] Please see Figures 1 to 8 The second aspect of this application provides a refrigerant leakage detection system, including the detection device described in the above embodiments, and also including a test piece 7. The test piece 7 has an internal cavity 71 for containing refrigerant. After the detection device is connected to the internal cavity 71, it can be used to detect whether there is a risk of refrigerant leakage in the internal cavity 71 of the test piece 7.

[0093] In some embodiments of this application, the component to be tested 7 is a heat exchange pipe in an air conditioning heat exchanger, and the internal cavity 71 is a refrigerant channel formed inside the heat exchange pipe. The first pipe 11 of the testing device is connected to one end of the heat exchange pipe, and the second pipe 12 is connected to the other end of the heat exchange pipe. The air source assembly 2 is connected to the first pipe 11 through the first air pipe 22 and to the buffer chamber 3 through the second air pipe 23. The buffer chamber 3 is connected to the second pipe 12. When the air pump 21 performs air filling or air extraction operations, the airflow in the entire airflow channel can be buffered through the buffer chamber 3, thereby gradually changing the pressure inside the heat exchange pipe and preventing the heat exchange pipe from deforming, cracking, or being damaged due to excessive pressure during the air filling or air extraction process.

[0094] During the testing process, the buffer chamber 3 enhances the pressure stability of the charging or evacuating airflow in the testing device. The valves and pressure sensors allow for precise control of the airflow pressure, ensuring the reliability of the pressure settings during testing. The control component 6 enables automated control of the refrigerant leak detection system, improving testing accuracy and reducing the possibility of misjudgments.

[0095] In some embodiments of this application, both ends of the heat exchange pipe are provided with flange connections, which can be used to achieve matching connections with the first connecting part 13 and the second connecting part 14, ensuring the airtightness of the connection process. At the same time, since the connecting flanges of the first connecting part 13 and the second connecting part 14 are standard parts, it is possible to test heat exchangers of any model, greatly expanding the application range of the testing device.

[0096] A movable component 5 is provided at the bottom of the main body 4 of the device, which makes the detection device easy to move and is particularly suitable for the detection of large air conditioners.

[0097] Please see Figures 1 to 8 The third aspect of this application provides a testing method that employs the testing device described in the above embodiments. This method can be used to test the sealing performance of any product, such as containers, pipes, and housing components. It includes the following steps:

[0098] Step 1: Start the gas supply component 2;

[0099] Step 2: The buffer chamber 3 buffers the airflow, so that the internal air pressure of the pipeline assembly 1 changes gradually; to avoid a sudden pressure change in the internal cavity 71 of the test piece 7, which could cause the test piece 7 to deform, crack or be damaged.

[0100] Step 3: Inflate or depressurize the internal cavity 71 of the test piece 7 through the first pipe 11 and the second pipe 12. When the air pressure in the internal cavity 71 reaches the preset air pressure, shut off the air source assembly 2.

[0101] Step 4: Record the pressure changes in the internal cavity 71 of the component to be tested 7, and determine the sealing performance of the component to be tested 7 based on the recorded results.

[0102] In some embodiments of this application, when the internal cavity 71 of the test piece 7 is inflated by the air source assembly 2, after the internal cavity 71 reaches the preset air pressure (positive pressure), the first valve 15 and the second valve 17 are closed to keep the pressure of the first pipeline 11, the internal cavity 71 and the second cavity at the preset air pressure value. After a period of time (e.g., 30 minutes), the measured pressure values ​​of the first pressure detection element 16 and the second pressure detection element 18 are observed. If the measured pressure value is still consistent with the preset air pressure value, it indicates that the sealing performance of the internal cavity 71 of the test piece 7 is good and there is no cracking or leakage. If the measured pressure value is significantly lower than the preset air pressure value, it indicates that the pressure of the first pipeline 11, the internal cavity 71 and the second cavity has dropped significantly, the internal cavity 71 has air leakage, and the test piece 7 has a sealing performance defect.

[0103] In some other embodiments of this application, when the internal cavity 71 of the test piece 7 is evacuated through the air source assembly 2, after the internal cavity 71 reaches the preset air pressure (negative pressure), the first valve 15 and the second valve 17 are closed, so that the pressure of the first pipeline 11, the internal cavity 71 and the second cavity are maintained at the preset air pressure value. After a period of time, the measured pressure values ​​of the first pressure detection element 16 and the second pressure detection element 18 are observed. If the measured pressure value is still consistent with the preset air pressure value, it indicates that the sealing performance of the internal cavity 71 of the test piece 7 is good and there is no crack or leakage. If the measured pressure value is significantly higher than the preset air pressure value, it indicates that the pressure of the first pipeline 11, the internal cavity 71 and the second cavity has increased significantly, the internal cavity 71 has cracks, and external air is being drawn in, indicating that the test piece 7 has a sealing performance defect.

[0104] Step 5: After the test is completed, open the ventilation section 31 of the buffer chamber 3 to connect the buffer chamber 3 with the outside atmosphere, so that the air pressure values ​​of the first pipeline 11, the internal cavity 71 and the second pipeline 12 are restored to atmospheric pressure, which facilitates the subsequent disassembly operation and can improve the safety of the test process.

[0105] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “described” as used herein may also include the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a particular order described or illustrated unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.

[0106] Although terms such as first, second, third, etc., may be used in this document to describe multiple elements, components, regions, layers, and / or segments, these elements, components, regions, layers, and / or segments should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or segment from another. Unless the context clearly indicates otherwise, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence. Therefore, the first element, component, region, layer, or segment discussed below may be referred to as the second element, component, region, layer, or segment without departing from the teachings of the exemplary embodiments.

[0107] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A detection device, characterized in that, include: Piping assembly (1), the piping assembly (1) being used to communicate with the internal cavity (71) of the test piece (7); Gas source assembly (2), which is connected to the pipeline assembly (1), is used to inflate or de-inflate the internal cavity (71) of the test piece (7); A buffer chamber (3) is connected between the gas source assembly (2) and the pipeline assembly (1).

2. The detection device according to claim 1, characterized in that, The cross-sectional area of ​​the buffer chamber (3) is greater than the cross-sectional area of ​​the pipeline assembly (1).

3. The detection device according to claim 1, characterized in that, The buffer chamber (3) has an openable vent (31).

4. The detection device according to claim 3, characterized in that, A sealing assembly (32) is provided at the vent (31).

5. The detection device according to claim 3, characterized in that, A filter assembly (33) is provided at the ventilation section (31).

6. The detection device according to claim 1, characterized in that, The pipeline assembly (1) includes a first pipeline (11) and a second pipeline (12), which are respectively connected to the internal cavity (71) of the test piece (7).

7. The detection device according to claim 6, characterized in that, Both the first pipeline (11) and the second pipeline (12) are flexible pipelines.

8. The detection device according to claim 6, characterized in that, Both the first pipe (11) and the second pipe (12) are provided with connecting parts at their ends, and the connecting parts are used to achieve a sealed connection with the test piece (7).

9. The detection device according to claim 8, characterized in that, The connection includes a connecting flange or a quick coupling.

10. The detection device according to claim 6, characterized in that, The first pipeline (11) is connected between the gas source assembly (2) and the test piece (7), and the second pipeline (12) is connected between the buffer chamber (3) and the test piece (7).

11. The detection device according to claim 6, characterized in that, Both the first pipeline (11) and the second pipeline (12) are equipped with valves, and the first pipeline (11) and / or the second pipeline (12) are equipped with pressure detection devices.

12. The detection device according to any one of claims 1 to 10, characterized in that, The air source assembly (2) includes an air pump (21), a first air pipe (22) and a second air pipe (23). The first air pipe (22) and the second air pipe (23) are both connected to the air pump (21), and the first air pipe (22) and / or the second air pipe (23) are connected to the buffer chamber (3).

13. The detection device according to any one of claims 1 to 10, characterized in that, It also includes a device body (4), the gas source assembly (2) and the buffer chamber (3) are disposed inside the device body (4), and part of the pipeline assembly (1) extends out of the device body (4); The bottom of the main body (4) of the device is provided with a movable component (5).

14. A refrigerant leak detection system, characterized in that, The detection device as described in any one of claims 1 to 13 further includes a test piece (7) having an internal cavity (71) for containing refrigerant.

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