Detection device, refrigerant leakage detection system and detection method

Abstract

The invention relates to a detection device, a refrigerant leakage detection system and a detection method, 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] The present application relates to the field of detection technology, and in particular to a detection device, a refrigerant leakage detection system and a detection method. Background Art

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

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

[0004] Existing sealing performance testing devices usually directly connect an air pump to the internal cavity of a part to be tested (such as a heat exchange pipe, etc.) through a pipeline, and inflate or exhaust air into the internal cavity of the part to be tested through the air pump. However, after the air pump is started, the air pressure in the pipeline and inside the part to be tested changes rapidly. When the instantaneous inflation pressure (positive pressure) or exhaust pressure (negative pressure) generated by the air pump exceeds the tolerance limit of the part to be tested, it may cause the part to be tested to deform, rupture or be damaged. Summary of the invention

[0005] The present application provides a detection device, a refrigerant leakage detection system and a detection method to solve the technical problem in the prior art that when the test piece is inflated or deflated through an air pump and a pipeline, the test piece is easily deformed, ruptured or damaged due to rapid changes in pressure.

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

[0007] A pipeline assembly, the pipeline assembly is used to communicate with the internal cavity of the part to be detected;

[0008] An air source assembly, the air source assembly is connected to the pipeline assembly and is used to inflate or evacuate air into the internal cavity of the part to be tested;

[0009] The buffer chamber is connected between the gas source component and the pipeline component.

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

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

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

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

[0014] Optionally, the pipeline assembly includes a first pipeline and a second pipeline, and the first pipeline and the second pipeline are respectively connected to the internal cavity of the part to be detected.

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

[0016] Optionally, both ends of the first pipeline and the second pipeline are provided with connecting parts, and the connecting parts are used to achieve a sealed connection with the to-be-detected component.

[0017] Optionally, the connecting portion includes a connecting flange or a quick connector.

[0018] Optionally, the first pipeline is connected between the gas source component and the part to be detected, and the second pipeline is connected between the buffer chamber and the part to be detected.

[0019] Optionally, valve components are provided on both the first pipeline and the second pipeline, and a pressure detection component is provided on the first pipeline and / or the second pipeline.

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

[0021] Optionally, the detection device further comprises a device body, the gas source assembly and the buffer chamber are arranged inside the device body, and part of the pipeline assembly extends out of the device body;

[0022] A moving assembly is provided at the bottom of the device body.

[0023] In a second aspect, the present application provides a refrigerant leakage detection system, including the detection device provided in the first aspect of the present application, and also including a to-be-detected object, wherein the to-be-detected object has an internal cavity for accommodating the refrigerant.

[0024] In a third aspect, the present application provides a detection method, which uses the detection device provided in the first aspect of the present application, and includes the following steps:

[0025] Start the air source assembly;

[0026] The buffer chamber buffers the airflow, causing the internal air pressure of the pipeline assembly to change gradually;

[0027] Inflate or exhaust air into the internal cavity of the object to be tested, and when the air pressure in the internal cavity reaches the preset air pressure, close the air source component;

[0028] The pressure changes in the internal cavity of the part to be tested are recorded, and the sealing performance of the part to be tested is determined based on the recorded results.

[0029] The above technical solution provided by the embodiment of the present application has the following advantages compared with the prior art:

[0030] The detection device provided in the embodiment of the present application connects the air source component with the pipeline component so as to inflate or evacuate the internal cavity of the part to be detected during the detection process, so that the air pressure value of the internal cavity reaches the preset air pressure required for the test. The buffer chamber is connected between the air source component and the pipeline component. During the startup of the air source component, the airflow can be buffered by the buffer chamber, which can slow down the rate of change of the flow velocity inside the pipeline component, making the flow velocity change of the airflow more stable, so that the air pressure in the internal cavity of the pipeline component and the part to be detected changes steadily and gradually, avoiding the occurrence of large instantaneous inflation pressure or exhaust pressure in the internal cavity of the pipeline component and the part to be detected, causing deformation, rupture or damage to the part to be detected.

[0031] The refrigerant leakage detection system and detection method provided in the embodiments of the present application include the above-mentioned detection device, which can buffer the airflow through the buffer chamber and naturally has the technical effect of the above-mentioned detection device. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0033] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0034] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0035] Figure 1 A partial cross-sectional view of the detection device provided in the embodiment of the present application Figure 1 ;

[0036] Figure 2 Provided in the embodiments of this application Figure 1 A magnified view of the details of part A;

[0037] Figure 3 A partial cross-sectional view of the detection device provided in the embodiment of the present application Figure 2 ;

[0038] Figure 4A front view of a first connecting portion provided in an embodiment of the present application;

[0039] Figure 5 A schematic diagram of the structure of a refrigerant leakage detection system provided in an embodiment of the present application;

[0040] Figure 6 The detection principle of the detection device provided in the embodiment of the present application Figure 1 ;

[0041] Figure 7 The detection principle of the detection device provided in the embodiment of the present application Figure 2 ;

[0042] Figure 8 A flow chart of the detection method provided in an embodiment of the present application.

[0043] Description of reference numerals:

[0044] 1. Pipeline assembly; 11. First pipeline; 12. Second pipeline; 13. First connecting part; 131. Flange body; 132. Connecting hole; 133. Sealing ring; 14. Second connecting part; 15. First valve component; 16. First pressure detection component; 17. Second valve component; 18. Second pressure detection component;

[0045] 2. air source assembly; 21. air pump; 22. first air pipe; 23. second air pipe;

[0046] 3. Buffer chamber; 31. Ventilation portion; 311. Ventilation hole; 312. Sealing cover; 32. Sealing assembly; 33. Filter assembly;

[0047] 4. Device body;

[0048] 5. Mobile components;

[0049] 6. Control components;

[0050] 7. Parts to be tested; 71. Internal cavity. DETAILED DESCRIPTION

[0051] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0052] The disclosure below provides many different embodiments or examples to realize the different structures of the present application. In order to simplify the disclosure of the present application, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present application. In addition, the present application can repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0053] For ease of description, spatial relative terms may be used herein to describe the relative positional relationship or movement of one element or feature relative to another element or feature as shown in the figure, such as "inside", "outside", "inner side", "outer side", "below", "below", "above", "above", "front", "back", etc. Such spatial relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figure. For example, if the device in the figure undergoes a position flip or a posture change or a motion state change, then these directional indications also change accordingly, for example: an element described as "below other elements or features" or "below other elements or features" will subsequently be oriented as "above other elements or features" or "above other elements or features". Therefore, the example term "below..." may 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 herein are interpreted accordingly.

[0054] In order to solve the technical problem in the prior art that when the test piece 7 is inflated or exhausted through an air pump 21 and a pipeline, the test piece 7 is easily deformed, ruptured or damaged due to rapid pressure changes, the present application provides a detection device, a refrigerant leakage detection system and a detection method. The detection device connects the buffer chamber 3 between the air source component 2 and the pipeline component 1, and can buffer the airflow generated by the air source component 2, so that the air pressure inside the pipeline component 1 changes steadily and gradually, and can avoid the air source component 2 from generating a large instantaneous inflation pressure or exhaust pressure when inflating or exhausting air, thereby preventing the test piece 7 connected to the pipeline component 1 from being deformed, ruptured or damaged.

[0055] See also Figures 1 to 8 In a first aspect, an embodiment of the present application provides a detection device, including a pipeline assembly 1, an air source assembly 2 and a buffer chamber 3. The pipeline assembly 1 is used to communicate with the internal cavity 71 of the part to be detected 7. The air source assembly 2 is connected to the pipeline assembly 1 and is used to inflate or exhaust air into the internal cavity 71 of the part to be detected 7, so as to inflate or exhaust air into the internal cavity 71 of the part to be detected 7 during the sealing performance detection process, so that the air pressure value of the internal cavity 71 reaches the preset air pressure required for the test, such as Figure 1 and Figure 5 shown.

[0056] The buffer chamber 3 is connected between the air source component 2 and the pipeline component 1. During the startup of the air source component 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 component 1, making the flow velocity change more stable, so that the air pressure in the pipeline component 1 changes steadily and gradually, avoiding the occurrence of large instantaneous inflation pressure or exhaust pressure in the internal cavity 71 of the pipeline component 1 and the part to be detected 7, which may cause deformation, rupture or damage to the part to be detected 7.

[0057] In some embodiments of the present application, when the internal cavity 71 is inflated through the air source component 2, the high-speed, high-pressure airflow output from the air source component 2 enters the buffer chamber 3, and after the airflow pressure and flow rate are reduced in the buffer chamber 3, it enters the internal cavity 71 of the part to be detected 7 through the pipeline component 1. During the inflation process, due to the buffering effect of the buffer chamber 3, the airflow output from the pipeline component 1 to the part to be detected 7 can be smooth, and a large positive pressure can be avoided in the pipeline component 1 and the internal cavity 71, and the expansion and rupture of the part to be detected 7 can be avoided, so that the air pressure in the internal cavity 71 of the part to be detected 7 is steadily increased to the preset air pressure (positive pressure).

[0058] In other embodiments of the present application, when the air is extracted from the internal cavity 71 through the air source component 2, the air source component 2 will first draw the airflow in the buffer chamber 3, and then the airflow in the pipeline component 1 and the internal cavity 71 will slowly flow into the buffer chamber 3, which can avoid a large negative pressure in the pipeline component 1 and the internal cavity 71, and can prevent the collapse and deformation of the to-be-detected part 7. The air pressure in the internal cavity 71 of the to-be-detected part 7 gradually decreases until it reaches the preset air pressure (negative pressure).

[0059] 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 the cross-sectional area of ​​the pipeline of the pipeline assembly 1, so that the buffer chamber 3 has a larger volume. The larger volume means that the buffer chamber 3 can accommodate more fluid, thereby more effectively balancing the pressure pulsation in the pipeline assembly 1 and playing a more effective airflow buffering role.

[0060] It should be noted that the shape formed by the inner wall of the buffer chamber 3 can be a rectangular parallelepiped, a sphere, a capsule, etc., all of which can achieve the purpose of the present application. In some preferred embodiments of the present application, the cross-sectional area of ​​the buffer chamber 3 is more than 5 times the cross-sectional area of ​​the pipeline of the pipeline assembly 1, which can better absorb and slow down the vibration caused by the fluid pressure pulsation, help reduce the vibration of the pipeline assembly 1 and the system, and reduce the aerodynamic noise.

[0061] 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 can be used to connect the buffer chamber 3 and the entire pipeline system with the atmosphere during or after the test, so that the air pressure value of the entire pipeline system can be restored to the atmospheric pressure value; the problem of difficult disassembly due to large positive or negative pressure when directly disassembling the connection between the pipeline assembly 1 and the part to be tested 7 can be avoided. At the same time, since refrigerant and other substances may remain in the internal cavity 71 of the part to be tested 7, it can be avoided that the refrigerant is sprayed out from the connection between the pipeline assembly 1 and the part to be tested 7 due to excessive internal pressure of the pipeline system during the disassembly process, causing a safety accident.

[0062] In some embodiments of this application, please refer to Figure 2 The ventilation portion 31 includes a ventilation hole 311 connected to the buffer chamber 3, and 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 hinged connection, threaded connection, etc. As long as the sealing cover 312 is closed, the ventilation hole 311 can be blocked, so that there is no airflow leakage in the ventilation hole 311 and the ventilation portion 31, and the purpose of the present application can be achieved.

[0063] In some embodiments of this application, please refer to Figure 1 and Figure 2 A sealing component 32 is provided at the vent portion 31, which can ensure the sealing performance of the vent portion 31, thereby ensuring the sealing performance of the buffer chamber 3, so that when the vent portion 31 is in a closed state, the air flow 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.

[0064] In some embodiments of this application, please refer to Figure 2 The sealing assembly 32 is disposed on the sealing cover 312 , and the sealing assembly 32 includes one or more sealing rings 133 , which can be used to achieve circumferential sealing between the sealing cover 312 and the vent hole 311 .

[0065] In some embodiments of this application, please refer to Figure 1 and Figure 2 A filter assembly 33 is provided at the ventilation portion 31, which can prevent the refrigerant and other substances retained in the test piece 7 from being discharged into the atmosphere, which is beneficial to improving the environmental performance of the detection device; it can also prevent external impurities from entering the buffer chamber 3 and the test piece 7 through the ventilation hole 311, which is beneficial to improving the reliability of the detection device.

[0066] It should be noted that the filter component 33 can be configured as needed. When no harmful substances exist in the internal cavity 71 of the detected part 7, the filter component 33 may only include a dust filter. When harmful substances may remain in the internal cavity 71 of the detected part 7, the filter component 33 may include an activated carbon filter or a targeted adsorption filter.

[0067] In the above embodiment, the inspection member 7 can be inflated or evacuated through a single pipeline. However, when the buffer chamber 3 is provided, there will be a problem of low inflation efficiency or exhaust efficiency.

[0068] In order to solve the above problems, in some embodiments of the present application, please refer to Figure 1 , Figure 3 and Figure 5 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 detected part 7, and can simultaneously inflate or evacuate the internal cavity 71 of the detected part 7, thereby improving the inflation efficiency or the evacuation efficiency, thereby improving the detection efficiency of the detection device.

[0069] In some embodiments of the present application, the first pipeline 11 and the second pipeline 12 are respectively connected to the two ends of the internal cavity 71, and the internal cavity 71 can be inflated or exhausted at the same time, which can improve the inflation efficiency or the exhaust efficiency by more than 40%, which is beneficial to shorten the detection time and improve the detection efficiency of the detection device.

[0070] In some embodiments of this application, please refer to Figure 3 The first pipeline 11 and the second pipeline 12 are both flexible pipelines with deformation ability, so as to adjust the connection position and connection orientation between the first pipeline 11 and the second pipeline 12 and the part to be detected 7. When there is a distance or deviation between the interface positions of the internal cavity 71 on the part to be detected 7, the connection between the pipeline assembly 1 and the interface of the internal cavity 71 can be achieved by deformation of the first pipeline 11 and the second pipeline 12.

[0071] In some embodiments of this application, please refer to Figure 3 The first pipeline 11 and the second pipeline 12 are both corrugated tubes with good expansion and contraction deformation capabilities. They can easily cope with various bends, twists and folds during installation and use, greatly reducing the difficulty and cost of assembly; they can adapt to the interface positions of the internal cavity 71 on different types of parts to be detected 7, so that the detection device can adapt to the sealing performance detection of parts to be detected 7 of different models and sizes, thereby improving the flexibility and versatility of the detection device.

[0072] In other embodiments of the present application, the first pipeline 11 and the second pipeline 12 are both rubber tubes, which have good elastic deformation ability and excellent wear resistance, and can increase the service life of the pipeline assembly 1.

[0073] In some embodiments of this application, please refer to Figure 1 , Figure 3 and Figure 4 The ends of the first pipeline 11 and the second pipeline 12 are both provided with connecting parts, which are used to achieve a sealed connection with the part to be detected 7, so as to achieve the connection between the pipeline assembly 1 and the internal cavity 71 of the part to be sealed, and prevent the airflow from leaking from the connecting part, thereby improving the accuracy and reliability of the sealing performance test results.

[0074] In some embodiments of this application, please refer to Figure 1 and Figure 2 The end of the first pipeline 11 is provided with a first connecting portion 13 for connecting to the part to be detected 7; the end of the second pipeline 12 is provided with a second connecting portion 14 for connecting to the part to be detected 7, and the shapes of the first connecting portion 13 and the second connecting portion 14 are set according to the interface shape of the internal cavity 71 of the part to be detected 7.

[0075] In some embodiments of the present application, since the interface shape of the internal cavity 71 of the to-be-detected component 7 is generally a standard interface, please refer to Figure 1 , Figure 3 and Figure 4 The connection portion includes a connection flange, through which the first pipeline 11 or the second pipeline 12 can be quickly connected to the component to be detected 7, which is beneficial to improving the versatility of the detection device.

[0076] In some embodiments of this application, please refer to Figure 1 , Figure 3 and Figure 4 The first connection part 13 and the second connection part 14 have the same shape and both include a connection flange. The connection flange includes a flange body 131. The flange body 131 is provided with a connection hole 132 and a sealing ring 133. The sealing ring 133 is used to achieve the sealing between the interface between the connection flange and the internal cavity 71. The connection hole 132 is used to achieve a detachable connection between the interface between the connection flange and the internal cavity 71. The connection hole 132 is located on the outside of the sealing ring 133, which can block the airflow on the inside of the sealing ring 133 to prevent the airflow in the pipeline from leaking through the connection hole 132.

[0077] In other embodiments of the present application, the connection portion includes a quick connector, which can realize a quick connection between the first pipeline 11 or the second pipeline 12 and the interface of the internal cavity 71 by means of pulling and plugging, and can improve the efficiency of assembly and disassembly between the pipeline assembly 1 and the part to be detected 7. The quick connector can be a mature product in the prior art, and as long as it can realize a sealed connection between the pipeline assembly 1 and the part to be detected 7, the purpose of the present application can be achieved.

[0078] In the above embodiment, when the pipeline assembly 1 includes the first pipeline 11 and the second pipeline 12, the buffer chamber 3 can be connected to one of the first pipeline 11 and the second pipeline 12, or can be connected to the first pipeline 11 and the second pipeline 12 at the same time, and the purpose of the present application can be achieved. Figure 6 and Figure 7 shown.

[0079] In some preferred embodiments of this application, please refer to Figure 1 , Figure 3 and Figure 6 The first pipeline 11 is connected between the air source component 2 and the part to be detected 7, and the second pipeline 12 is connected between the buffer chamber 3 and the part to be detected 7. Compared with the two pipelines being connected to the buffer chamber 3, the number of pipeline connection points can be reduced, the assembly connection process can be reduced, and the risk of airflow leakage in the detection pipeline itself can be reduced.

[0080] It should be noted that since the air source assembly 2, the 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 by the buffer chamber 3.

[0081] In some embodiments of this application, please refer to Figure 1 , Figure 6 and Figure 7 The first pipeline 11 and the second pipeline 12 are both provided with valves, which can be used to control the flow rate and on-off of the airflow in the first pipeline 11 and the second pipeline 12. During the process of inflation and degassing, the flow rate of the airflow can be adjusted by the valves, so that the air pressure of the internal cavity 71 of the to-be-detected part 7 changes stably. During the detection process, the internal cavity 71 can be kept pressurized by closing the valves, so that the sealing performance of the to-be-detected part 7 can be judged by the subsequent pressure changes of the internal cavity 71.

[0082] In some embodiments of the present application, a first valve component 15 is provided on the first pipeline 11, and a second valve component 17 is provided on the second pipeline 12. The first valve component 15 and the second valve component 17 can be valve components such as regulating valves and butterfly valves. The driving mode of the first valve component 15 and the second valve component 17 is preferably electric drive or electromagnetic drive, which is conducive to realizing intelligent control of the pipeline assembly 1 and the detection device.

[0083] In some embodiments of the present application, a pressure detection component is 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 detected 7 are connected, the pressure detection component provided on the first pipeline 11 and / or the second pipeline 12 can be used to detect the pressure condition of the internal cavity 71.

[0084] In some embodiments of this application, please refer to Figure 1 , Figure 6 and Figure 7 , a first pressure detection member 16 is provided on the first pipeline 11, a second pressure detection member 18 is provided on the second pipeline 12, and the first pressure detection member 16 and the second pressure detection member 18 are both provided between the first valve member 15 and the second valve member 17. Since the first pipeline 11, the internal cavity 71 of the component to be detected 7 and the second pipeline 12 are in a connected state when the first valve member 15 and the second valve member 17 are closed, the internal air pressure of the three is the same, and the first pressure detection member 16 and the second pressure detection member 18 can be compared to confirm whether there is an abnormality in the first pressure detection member 16 and the second pressure detection member 18, which can improve the reliability of the detection result of the detection device. If the readings of the first pressure detection member 16 and the second pressure detection member 18 are the same, it means that the readings of the first pressure detection member 16 and the second pressure detection member 18 are normal. If the readings of the first pressure detection member 16 and the second pressure detection member 18 are different, it means that there is an abnormality in the first pressure detection member 16 and / or the second pressure detection member 18 and maintenance is required.

[0085] 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. The first air pipe 22 and the second air pipe 23 are both connected to the air pump 21, and can be used to communicate with the first pipeline 11 and the second pipeline 12 respectively, thereby forming two inflation pipelines or two exhaust pipelines; the first air pipe 22 and / or the second air pipe 23 are connected to the buffer chamber 3, and the inflation airflow or exhaust airflow of the air pump 21 can be buffered by the buffer chamber 3.

[0086] In some embodiments of this application, please refer to Figure 1 and Figure 6The first air pipe 22 is directly and tightly connected to the first pipeline 11, the second air pipe 23 is tightly connected to the buffer chamber 3, and the buffer chamber 3 is tightly connected to the second pipeline 12, so that the buffer chamber 3 serves as an intermediate link between the second air pipe 23 and the second pipeline 12, and the buffer chamber 3 can be used as a buffer zone to reduce the impact of external factors on the test results. At the same time, the buffer chamber 3 can also be used to expand the connectable area of ​​the second pipeline 12, so that the connection method between the second air pipe 23 and the second pipeline 12 is more flexible; in different test environments, the position and shape of the buffer chamber 3 and the connection position of the buffer chamber 3 and the second pipeline 12 can be adjusted to meet different test requirements.

[0087] In some embodiments of this application, please refer to Figure 1 , Figure 2 , Figure 3 and Figure 5 The detection device also includes a device body 4, an air source component 2 and a buffer chamber 3 are arranged inside the device body 4, and a part of the pipeline component 1 is extended out of the device body 4 to facilitate connection with the to-be-detected component 7 outside the device body 4; the air source component 2, the buffer chamber 3 and the pipeline component 1 are all arranged on the device body 4, so that the various components of the detection device can be assembled into a whole, which is convenient for realizing the overall movement of the detection device according to the detection requirements.

[0088] A moving component 5 is provided at the bottom of the device body 4, so that the entire detection device is easy to move, and the detection personnel can move the detection device to any detection required position, thereby improving the ease of use of the detection device and significantly improving the convenience and work efficiency of detection.

[0089] It should be noted that the mobile component 5 can be a mobile structure such as a roller, a track or a slide rail, which can achieve the purpose of this application. In some preferred embodiments of this application, the mobile component 5 is a roller component, and there is no need to set a mobile track inside the factory area, which can improve the mobility of the detection device and help reduce the production cost and weight of the detection device.

[0090] In some embodiments of this application, please refer to Figure 1 The device body 4 has two chambers inside, one of which is configured as a buffer chamber 3, and the other is configured as an installation chamber of the air source component 2. The first air pipe 22 passes through the side wall of the installation chamber and is connected 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 is connected to the buffer chamber 3. The second air pipe 23 and the buffer chamber 3 are sealed, which can avoid the installation chamber and the buffer chamber 3 from being connected, affecting the sealing performance of the buffer chamber 3 itself.

[0091] It should be noted that the installation chamber and the buffer chamber 3 can be arranged in an up-down layout or a left-right layout, and can be specifically arranged according to the interface positions of the first pipeline 11, the second pipeline 12 and the part to be detected 7, which is not limited here.

[0092] In some embodiments of the present application, a control component 6 is also provided on the device body, and signal connection with the air source component 2, the valve component and the pressure detection component can be achieved through the control component 6, the start and stop control of the air source component 2 and the valve component can be achieved through the control component 6, and the pressure detection information of the pressure detection component can be displayed through the control plane of the control component 6, making the detection process more efficient, accurate and intelligent.

[0093] It should be noted that the detection device of the present application can be used to detect any product that needs to be tested for sealing performance, such as containers, pipes and shell parts. By setting the buffer chamber 3, the air pressure stability of the inflation airflow or the exhaust airflow of the detection device is improved; by setting the valve and the pressure detection component, the airflow pressure can be accurately controlled to ensure the reliability of the pressure setting during the detection process. The display screen of the control component 6 can display the pressure value of the first pipeline 11 and the second pipeline 12 (i.e., the internal cavity 71) monitored by the pressure detection component in real time, which can help technicians to promptly discover and deal with potential leakage problems.

[0094] The detection device of the present application improves the accuracy of detection and reduces the possibility of misjudgment through precise and stable pressure control and real-time pressure monitoring. The control component 6 automatically controls the start and stop of the air pump 21 and the valve, making the detection process more efficient.

[0095] The flexibility of the first pipeline 11 and the second pipeline 12 and the universality of the connection part enable the detection device to adapt to different types of test pieces 7, thereby improving the flexibility and applicability of the detection. The buffer chamber 3 is designed with a vent 31 to facilitate the deflation operation after the detection is completed, thereby improving the safety of the detection.

[0096] In refrigeration equipment, the refrigerant circulates between components such as the compressor, condenser and evaporator, thereby realizing the condensation heat release of the condenser and the evaporation heat absorption of the evaporator. Once the refrigerant leaks, any tiny leak may cause the system performance to decline or even damage the refrigeration equipment. Therefore, regular refrigerant leakage detection is a key step to ensure the normal operation of the air-conditioning system.

[0097] See also Figures 1 to 8 According to a second aspect of an embodiment of the present application, a refrigerant leakage detection system is provided, including the detection device described in the above embodiment, and also including a part to be detected 7, the part to be detected 7 having an internal cavity 71 for accommodating the 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 part to be detected 7.

[0098] In some embodiments of the present application, the part to be detected 7 is a heat exchange pipe in an air conditioner heat exchanger, and the internal cavity 71 is a refrigerant channel formed inside the heat exchange pipe. The first pipeline 11 of the detection device is connected to one end of the heat exchange pipe, and the second pipeline 12 is connected to the other end of the heat exchange pipe. The air source component 2 is connected to the first pipeline 11 through the first air pipe 22, and is connected to the buffer chamber 3 through the second air pipe 23, and the buffer chamber 3 is connected to the second pipeline 12. When the air pump 21 performs inflation or exhaust operation, the airflow in the entire airflow channel can be buffered by the buffer chamber 3, so that the pressure inside the heat exchange pipe changes gradually, avoiding deformation, rupture or damage of the heat exchange pipe due to excessive pressure during inflation or exhaust.

[0099] During the detection process, the buffer chamber 3 is provided to improve the air pressure stability of the inflating airflow or the exhausting airflow of the detection device; the airflow pressure can be accurately controlled by providing valve components and pressure detection components to ensure the reliability of the pressure setting during the detection process. The control component 6 can realize the automatic control of the refrigerant leakage detection system, improve the accuracy of the detection, and reduce the possibility of misjudgment.

[0100] In some embodiments of the present application, flange connection ports are provided at both ends of the heat exchange pipe, which can be used to achieve matching connection with the first connection part 13 and the second connection part 14, thereby ensuring the airtightness of the connection process. At the same time, since the connection flanges of the first connection part 13 and the second connection part 14 are standard parts, it is possible to detect any type of heat exchanger, greatly expanding the application range of the detection device.

[0101] A moving assembly 5 is provided at the bottom of the device body 4, so that the detection device is easy to move and is particularly suitable for the detection of large air conditioners.

[0102] See also Figures 1 to 8 The third aspect of the embodiment of the present application provides a detection method, which uses the detection device according to any one of claims 1 to 13, and can be used to detect any product that needs to detect the sealing performance, such as containers, pipes, and shell parts. It includes the following steps:

[0103] Step 1: Start the gas source component 2;

[0104] Step 2: The buffer chamber 3 buffers the airflow so that the internal air pressure of the pipeline assembly 1 changes gradually, thereby preventing a sharp pressure change in the internal cavity 71 of the to-be-detected component 7, thereby causing deformation, rupture or damage to the to-be-detected component 7;

[0105] Step 3: Inflate or exhaust air into the internal cavity 71 of the to-be-detected component 7 through the first pipeline 11 and the second pipeline 12, and when the air pressure in the internal cavity 71 reaches a preset air pressure, close the air source assembly 2;

[0106] Step 4: Record the pressure change in the internal cavity 71 of the inspected component 7, and determine the sealing performance of the inspected component 7 based on the recording result.

[0107] In some embodiments of the present 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 a preset air pressure (positive pressure), the first valve component 15 and the second valve component 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 (such as 30 minutes), the measured pressure values ​​of the first pressure detection component 16 and the second pressure detection component 18 are observed. If the measured pressure value is still consistent with the preset air pressure value, it means that the sealing performance of the internal cavity 71 of the test piece 7 is good, and there is no rupture or leakage; if the measured pressure value is significantly lower than the preset air pressure value, it means that there is a significant drop in the pressure of the first pipeline 11, the internal cavity 71 and the second cavity, there is airflow leakage in the internal cavity 71, and there is a sealing performance defect in the test piece 7.

[0108] In other embodiments of the present application, when the internal cavity 71 of the test piece 7 is evacuated through the air source component 2, after the internal cavity 71 reaches a preset air pressure (negative pressure), the first valve component 15 and the second valve component 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, the measured pressure values ​​of the first pressure detection component 16 and the second pressure detection component 18 are observed. If the measured pressure value is still consistent with the preset air pressure value, it means that the sealing performance of the internal cavity 71 of the test piece 7 is good, and there is no rupture or leakage; if the measured pressure value is significantly higher than the preset air pressure value, it means that the pressure of the first pipeline 11, the internal cavity 71 and the second cavity has increased significantly, there are cracks in the internal cavity 71, the external atmosphere is sucked in, and there is a sealing performance defect in the test piece 7.

[0109] Step 5: After the detection is completed, the ventilation part 31 of the buffer chamber 3 is opened to connect the buffer chamber 3 with the outside atmosphere, and the air pressure values ​​of the first pipeline 11, the internal cavity 71 and the second pipeline 12 are restored to atmospheric pressure, which is convenient for subsequent disassembly operations and can improve the safety of the detection process.

[0110] It should be understood that the terms used in the text are only for the purpose of describing specific example embodiments and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used in the text may also be meant to include plural forms. The terms "include", "comprise", "contain", and "have" are inclusive, and therefore specify the existence of stated features, steps, operations, elements and / or parts, but do not exclude the existence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described in the text are not interpreted as necessarily requiring them to be performed in the specific order described or illustrated, unless the execution order is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0111] Although the terms first, second, third, etc. can be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.

[0112] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A detection device, characterized in that: include: A pipeline assembly (1), the pipeline assembly (1) being used to communicate with an internal cavity (71) of a component to be detected (7); An air source component (2), the air source component (2) being connected to the pipeline component (1) and used for inflating or exhausting air into an internal cavity (71) of the part to be detected (7); A buffer chamber (3), wherein the buffer chamber (3) is connected between the gas source component (2) and the pipeline component (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 pipeline 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 and closable vent (31).

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

5. The detection device according to claim 3, characterized in that: The ventilation portion (31) is provided with a filter assembly (33).

6. The detection device according to claim 1, characterized in that: The pipeline assembly (1) comprises a first pipeline (11) and a second pipeline (12), wherein the first pipeline (11) and the second pipeline (12) are respectively connected to the internal cavity (71) of the part to be detected (7).

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

8. The detection device according to claim 6, characterized in that: The ends of the first pipeline (11) and the second pipeline (12) are both provided with connecting parts, and the connecting parts are used to achieve a sealed connection with the to-be-detected component (7).

9. The detection device according to claim 8, characterized in that: The connecting part includes a connecting flange or a quick connector.

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

11. The detection device according to claim 6, characterized in that: The first pipeline (11) and the second pipeline (12) are both provided with valve components, and the first pipeline (11) and / or the second pipeline (12) are provided with pressure detection components.

12. The detection device according to any one of claims 1 to 10, characterized in that: The air source component (2) comprises 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 in communication with the buffer chamber (3).

13. The detection device according to any one of claims 1 to 10, characterized in that: It also comprises a device body (4), the gas source assembly (2) and the buffer chamber (3) are arranged inside the device body (4), and part of the pipeline assembly (1) is arranged to extend out of the device body (4); A moving component (5) is provided at the bottom of the device body (4).

14. A refrigerant leakage detection system, characterized in that: It comprises the detection device according to any one of claims 1 to 13, and further comprises a part to be detected (7), wherein the part to be detected (7) has an internal cavity (71) for accommodating a refrigerant.

15. A detection method, characterized in that: A detection device as claimed in any one of claims 1 to 13 is used, comprising the following steps: Starting the air source assembly (2); The buffer chamber (3) buffers the airflow, causing the internal air pressure of the pipeline assembly (1) to change gradually; Inflate or exhaust air into the internal cavity (71) of the part to be detected (7), and when the air pressure in the internal cavity (71) reaches a preset air pressure, close the air source component (2); The pressure change in the internal cavity (71) of the inspected component (7) is recorded, and the sealing performance of the inspected component (7) is determined based on the recorded result.

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