Leakage detection system and method for refrigeration pipeline of refrigerator cabinet

Abstract

The invention provides a refrigerator cabinet refrigeration pipeline leak detection system and method. The system comprises an air compressor, a first barometer and a second barometer. The air compressor is communicated with one end of the refrigeration pipeline through a connecting air pipe; the first barometer is connected with the first end of the refrigeration pipeline, and the second barometer is connected with the second end of the refrigeration pipeline; after the refrigeration pipeline is welded, compressed air is introduced into one end of the refrigeration pipeline through an air compressor to reach preset pressure; air pressure values at the two ends of the refrigeration pipeline are detected through the first air pressure meter and the second air pressure meter respectively; comparing whether the air pressure values at the two ends of the refrigeration pipeline are consistent; if the air pressure values at the two ends of the refrigeration pipeline are consistent, determining that the refrigeration pipeline has no leakage phenomenon; and if the air pressure values at the two ends of the refrigeration pipeline are not consistent, the refrigeration pipeline has a leakage phenomenon, so that the problems of repeated operation and refrigerant waste caused by reworking of the refrigeration pipeline of the refrigerator cabinet due to leakage are solved.

Description

Technical Field

[0001] The present application relates to the technical field of refrigerator cabinet production process, and in particular to a refrigerator cabinet refrigeration pipeline leak detection system and method. Background Art

[0002] The tightness of refrigerator refrigeration piping is crucial for reliable cooling. During refrigerator production, welded refrigeration piping is filled with a specific refrigerant. The refrigerant's content, purity, and the degree of vacuum within the piping directly determine the refrigerator's ultimate cooling performance. Leaks in the piping can lead to refrigerant loss, causing serious quality issues such as non-stop operation. Therefore, efficient and reliable leak detection of refrigeration piping is a core component of refrigerator quality control.

[0003] The typical procedure for refrigeration pipe leak detection is as follows: After the pipes are welded, vacuum is first evacuated, followed by refrigerant injection into the negatively pressurized pipes. Leak detection is then performed, and finally, the entire unit's refrigeration performance is tested and the outer packaging assembled. Specifically, the leak detection process involves using specialized refrigerant detection equipment to detect leaks at the welded joints of the refrigeration pipes.

[0004] The aforementioned testing procedure places leak detection after vacuuming and refrigerant injection. If a leak is detected during this phase, the injected refrigerant must be discharged, and then the pipes must be welded, repaired, vacuumed, and refilled with refrigerant for testing. This procedural arrangement leads to three core contradictions: First, the duplication of production steps such as welding, vacuuming, refrigerant injection, and leak detection significantly reduces the overall efficiency of the production line; second, the discharge and refilling of refrigerant results in direct refrigerant waste; and third, given that refrigerant is flammable and explosive, the discharge, recovery, and refilling processes introduce additional safety risks. Summary of the Invention

[0005] The present application provides a refrigerator cabinet refrigeration pipeline leak detection system and method to solve the problems of repeated work and refrigerant waste caused by rework of refrigerator cabinet refrigeration pipeline due to leakage.

[0006] A first aspect of the present application provides a method for detecting leaks in refrigeration pipes of a refrigerator cabinet, the method comprising:

[0007] After the refrigeration pipe welding is completed, compressed air is introduced into one end of the refrigeration pipe through an air compressor to a predetermined pressure;

[0008] A first pressure gauge and a second pressure gauge are respectively provided at both ends of the refrigeration pipe;

[0009] respectively detecting the air pressure values at both ends of the refrigeration pipe by using the first air pressure gauge and the second air pressure gauge;

[0010] Compare the air pressure values at both ends of the refrigeration pipe to see if they are consistent:

[0011] If the air pressure values at both ends of the refrigeration pipeline are consistent, then there is no leakage in the refrigeration pipeline;

[0012] If the air pressure values at both ends of the refrigeration pipeline are inconsistent, the refrigeration pipeline has a leakage phenomenon.

[0013] The refrigerator cabinet refrigeration pipe leak detection method can quickly identify leaks by passing compressed air into the pipe after welding and using pressure gauges at both ends of the refrigeration pipe to detect the consistency of air pressure values, thereby reducing the frequency of repeated operations and refrigerant waste, improving detection efficiency and resource utilization, and solving the problems of repeated operations and refrigerant waste caused by rework of refrigerator cabinet refrigeration pipes due to leakage.

[0014] Optionally, if the air pressure values at both ends of the refrigeration pipe are consistent, the method further includes:

[0015] performing a vacuum treatment on the refrigeration pipeline;

[0016] Inject refrigerant into the vacuumed refrigeration pipe;

[0017] Assemble the refrigeration pipe after injecting refrigerant into the refrigerator cabinet;

[0018] The assembled refrigerator cabinet is subjected to a refrigeration performance test to check whether the refrigeration performance of the refrigerator cabinet is qualified.

[0019] After confirming that there are no leaks in the refrigeration pipeline, the above method further performs vacuum treatment and injects refrigerant, and then assembles it to the refrigerator cabinet and performs a refrigeration performance test. This helps to improve the sealing and operational reliability of the refrigeration system, while reducing refrigerant loss caused by leakage, thereby improving the overall refrigeration efficiency and quality stability of the refrigerator cabinet.

[0020] Optionally, the step of injecting refrigerant into the vacuumed refrigeration pipe includes:

[0021] Inject the refrigerant according to the designed charge amount of the refrigeration system, wherein the refrigerant is isobutane or propane;

[0022] After the refrigerant is injected, the refrigeration pipeline valve is closed and left to stand for 3-5 minutes to allow the refrigerant to fully diffuse and balance in the refrigeration pipeline.

[0023] The above method accurately controls the amount of isobutane or propane used according to the designed filling amount when injecting the refrigerant, and closes the valve and stands for 3-5 minutes after injection to allow the refrigerant to fully diffuse and balance, which helps to improve the uniformity of refrigerant distribution, improve the operating stability of the refrigeration system, and reduce energy efficiency losses caused by uneven refrigerant distribution.

[0024] Optionally, if the air pressure values at both ends of the refrigeration pipe are inconsistent, the method further includes:

[0025] Re-weld the refrigeration pipes with inconsistent air pressure values;

[0026] Repeat the process of detecting the air pressure values at both ends of the refrigeration pipe using the first pressure gauge and the second pressure gauge until the air pressure values at both ends of the refrigeration pipe are consistent.

[0027] When the above method detects that the air pressure values at both ends of the refrigeration pipeline are inconsistent, the leakage point can be corrected in time by re-welding and repeatedly testing the air pressure values until they are consistent, reducing the refrigerant loss caused by welding defects, and at the same time improving the sealing of the refrigeration pipeline and the reliability of subsequent assembly.

[0028] Optionally, before comparing whether the air pressure values at both ends of the refrigeration pipe are consistent, the method further includes:

[0029] After the compressed air introduced into the refrigeration pipe reaches a predetermined pressure, the predetermined pressure is maintained for a preset holding time of at least 5 minutes; wherein the predetermined pressure is 0.8-1.2 MPa;

[0030] During the preset pressure holding time, real-time monitoring and recording of the air pressure changes at both ends of the refrigeration pipeline;

[0031] When the preset pressure holding time is reached, if the pressure values at both ends of the refrigeration pipe decrease by no more than 3% of the initial pressure value, the pressure values at both ends of the refrigeration pipe are compared to see whether they are consistent.

[0032] The above method sets a pressure holding stage of 0.8-1.2MPa and maintains it for at least 5 minutes before air pressure testing. By monitoring the air pressure changes in real time, the pressure stability of the pipeline system can be confirmed before the formal comparison of the air pressure values at both ends, thereby improving the accuracy of leak detection, reducing misjudgments caused by instantaneous pressure fluctuations, and providing a more reliable data basis for subsequent air pressure value comparisons.

[0033] Optionally, the first barometer or the second barometer is a pointer-type or digital pressure gauge.

[0034] Using pointer or digital pressure gauge as the detection device, the pressure gauge type can be flexibly selected according to actual needs to adapt to the requirements of different detection environments, while ensuring the accuracy and reliability of air pressure detection data, providing an effective measurement method for refrigeration pipeline sealing evaluation.

[0035] A second aspect of the present application provides a refrigerator cabinet refrigeration pipeline leak detection system, which is applicable to the refrigerator cabinet refrigeration pipeline leak detection method according to the first aspect, and the system comprises: an air compressor, a first pressure gauge, and a second pressure gauge;

[0036] The air compressor is connected to one end of the refrigeration pipe through a connecting air pipe, and the air compressor is used to inject compressed air into the refrigeration pipe to a predetermined pressure;

[0037] The first barometer is connected to the first end of the refrigeration pipe, and the second barometer is connected to the second end of the refrigeration pipe; the first barometer and the second barometer are used to respectively detect the air pressure values at both ends of the refrigeration pipe, so as to determine whether there is any leakage in the refrigeration pipe based on the air pressure values at both ends of the refrigeration pipe.

[0038] The refrigerator cabinet refrigeration pipe leak detection system injects compressed air into the pipe through an air compressor and uses a first pressure gauge and a second pressure gauge respectively arranged at both ends of the pipe to synchronously detect the air pressure value. It can quickly and accurately determine the sealing status of the pipe, thereby reducing manual detection errors, improving detection efficiency, and providing reliable technical support for the quality control of the refrigeration system.

[0039] Optionally, the air compressor is equipped with a pressure regulating module for stabilizing the compressed air pressure within the range of 0.8-1.2 MPa;

[0040] The system further comprises a timing module for starting a pressure holding timer of at least 5 minutes after a predetermined pressure is reached.

[0041] The system uses a pressure regulating module to stably control the compressed air pressure within the range of 0.8-1.2MPa, and cooperates with the timing module to achieve accurate pressure-maintaining timing function, which helps maintain the stability of the detection pressure, improves the accuracy of leakage judgment, and provides a standardized operating procedure for pipeline sealing detection.

[0042] Optionally, a data processor is connected between the first barometer and the second barometer, and the data processor is configured to:

[0043] Calculating the difference in air pressure between the two ends of the refrigeration pipeline in real time;

[0044] When the air pressure at both ends of the refrigeration pipe drops by more than 3% of the initial value or the difference in air pressure at both ends of the refrigeration pipe exceeds a threshold within the preset pressure holding time, a leakage alarm is triggered.

[0045] The system uses a data processor to calculate and compare the difference in air pressure and the pressure drop at both ends of the refrigeration pipeline in real time, triggering an alarm when an abnormal situation is detected. It can promptly identify potential leakage risks, improve the degree of automation of the detection process, reduce human judgment errors, and enhance the reliability of the detection results.

[0046] Optionally, the system further includes a quick switching interface linked to an air compressor, which is used to directly connect a vacuum pump for vacuuming when it detects that the air pressure values at both ends of the refrigeration pipeline are consistent.

[0047] The system is equipped with a quick-switching interface linked to the air compressor, which can immediately switch to the vacuum pump for vacuuming after confirming that the pipeline is sealed. This helps to optimize the connection efficiency between detection and subsequent processing, reduce equipment switching time, and at the same time maintain the closed state of the pipeline system, thereby improving the continuity of the overall process flow.

[0048] It can be seen from the above technical solution that the present application provides a refrigerator cabinet refrigeration pipe leak detection system and method, the system including an air compressor, a first pressure gauge and a second pressure gauge; the air compressor is connected to one end of the refrigeration pipe through a connecting air pipe; the first pressure gauge is connected to the first end of the refrigeration pipe, and the second pressure gauge is connected to the second end of the refrigeration pipe; after completing the refrigeration pipe welding, compressed air is first introduced into one end of the refrigeration pipe through the air compressor to a predetermined pressure; then the air pressure values at both ends of the refrigeration pipe are respectively detected by the first pressure gauge and the second pressure gauge; compare whether the air pressure values at both ends of the refrigeration pipe are consistent: if the air pressure values at both ends of the refrigeration pipe are consistent, then there is no leakage in the refrigeration pipe; if the air pressure values at both ends of the refrigeration pipe are inconsistent, then there is a leakage in the refrigeration pipe, so as to solve the problem of repeated work and refrigerant waste caused by rework of the refrigerator cabinet refrigeration pipe due to leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] In order to more clearly illustrate the technical solution of the present application, the following is a brief introduction to the drawings required for use in the embodiments. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0050] Figure 1 A schematic diagram of a flow chart of a refrigerator cabinet refrigeration pipe leak detection method provided in an embodiment of the present application;

[0051] Figure 2 This is a schematic diagram of the structure of the refrigerator cabinet refrigeration pipe leak detection system provided in an embodiment of the present application.

[0052] Illustration:

[0053] Among them, 1-refrigeration pipe; 2-first pressure gauge; 3-second pressure gauge; 4-connecting air pipe; 5-air compressor. DETAILED DESCRIPTION

[0054] The following embodiments are described in detail, with examples illustrated in the accompanying drawings. When the following description refers to the drawings, identical numerals in different figures represent identical or similar elements unless otherwise indicated. The embodiments described in the following embodiments are not intended to represent all possible implementations consistent with the present application. They are merely examples of systems and methods consistent with certain aspects of the present application.

[0055] It should be noted that the brief descriptions of terms in this application are only for the purpose of facilitating the understanding of the embodiments described below, and are not intended to limit the embodiments of this application. Unless otherwise specified, these terms should be understood according to their ordinary and usual meanings.

[0056] In the specification and claims of this application and the accompanying drawings, the terms "first," "second," "third," etc. are used to distinguish similar or similar objects or entities, and are not necessarily intended to limit a particular order or sequence, unless otherwise noted. It should be understood that the terms used in this manner are interchangeable under appropriate circumstances.

[0057] The terms "comprise," "comprises," and "having," and any variations thereof, are intended to cover but not exclude inclusion; for example, a product or device comprising a list of components is not necessarily limited to all the components expressly listed but may include other components not expressly listed or inherent to such product or device.

[0058] The tightness of refrigerator refrigeration piping is crucial for reliable cooling. During refrigerator production, welded refrigeration piping is filled with a specific refrigerant. The refrigerant's content, purity, and the degree of vacuum within the piping directly determine the refrigerator's ultimate cooling performance. Leaks in the piping can lead to refrigerant loss, causing serious quality issues such as non-stop operation. Therefore, efficient and reliable leak detection of refrigeration piping is a core component of refrigerator quality control.

[0059] The typical procedure for refrigeration pipe leak detection is as follows: After the pipes are welded, vacuum is first evacuated, followed by refrigerant injection into the negatively pressurized pipes. Leak detection is then performed, and finally, the entire unit's refrigeration performance is tested and the outer packaging assembled. Specifically, the leak detection process involves using specialized refrigerant detection equipment to detect leaks at the welded joints of the refrigeration pipes.

[0060] The aforementioned testing procedure places leak detection after vacuuming and refrigerant injection. If a leak is detected during this phase, the injected refrigerant must be discharged, and then the pipes must be welded, repaired, vacuumed, and refilled with refrigerant for testing. This procedural arrangement leads to three core contradictions: First, the duplication of production steps such as welding, vacuuming, refrigerant injection, and leak detection significantly reduces the overall efficiency of the production line; second, the discharge and refilling of refrigerant results in direct refrigerant waste; and third, given that refrigerant is flammable and explosive, the discharge, recovery, and refilling processes introduce additional safety risks.

[0061] To solve the problem of repeated work and refrigerant waste caused by rework due to leakage in refrigerator cabinet refrigeration pipes, see Figure 1-Figure 2 Some embodiments of the present application provide a method for detecting leaks in refrigeration pipes of a refrigerator cabinet, the method comprising:

[0062] S100: After the refrigeration pipe 1 is welded, compressed air is introduced into one end of the refrigeration pipe 1 through the air compressor 5 to a predetermined pressure.

[0063] S200: A first pressure gauge 2 and a second pressure gauge 3 are respectively provided at both ends of the refrigeration pipe 1 .

[0064] S300: Detecting the air pressure values at both ends of the refrigeration pipe 1 by using the first barometer 2 and the second barometer 3 respectively.

[0065] S400: Compare the air pressure values at both ends of the refrigeration pipe 1 to see if they are consistent:

[0066] S410: If the air pressure values at both ends of the refrigeration pipe 1 are consistent, then there is no leakage in the refrigeration pipe 1;

[0067] S420: If the air pressure values at both ends of the refrigeration pipe 1 are inconsistent, the refrigeration pipe 1 has a leakage phenomenon.

[0068] The refrigerator cabinet refrigeration pipe leak detection method can quickly identify leakage by introducing compressed air into the pipe after welding and using pressure gauges at both ends of the refrigeration pipe to detect the consistency of air pressure values, thereby reducing the frequency of repeated operations and refrigerant waste, improving detection efficiency and resource utilization, and solving the problems of repeated operations and refrigerant waste caused by rework of refrigerator cabinet refrigeration pipes due to leakage.

[0069] In some embodiments, if the air pressure values at both ends of the refrigeration pipe 1 are consistent, the method further includes:

[0070] The refrigeration pipe 1 is vacuumed.

[0071] It should be understood that before the refrigeration pipe 1 is vacuumed, the refrigeration pipe 1 needs to be depressurized, which helps to smoothly transition to the vacuum treatment stage, reduce the risk of sudden pressure changes in the system, and create suitable working conditions for the subsequent vacuuming process, thereby improving the safety and reliability of the process operation.

[0072] In some embodiments, the step of vacuuming the refrigeration pipe 1 includes: first connecting the vacuum pump to the refrigeration pipe 1 through a quick switching interface, then starting the vacuum pump to reduce the pressure in the pipe to a predetermined vacuum degree and maintain it for a set time, and finally turning off the vacuum pump and keeping the pipe sealed to remove residual gas and moisture in the pipe, creating suitable conditions for subsequent refrigerant filling.

[0073] Refrigerant is injected into the vacuumed refrigeration pipe 1 .

[0074] In some embodiments, the step of injecting refrigerant into the vacuumed refrigeration pipe 1 includes:

[0075] Inject the refrigerant according to the designed charge amount of the refrigeration system, wherein the refrigerant is isobutane or propane;

[0076] After the refrigerant is injected, the valve of the refrigeration pipe 1 is closed and left to stand for 3-5 minutes to allow the refrigerant to fully diffuse and balance in the refrigeration pipe 1.

[0077] The above method accurately controls the amount of isobutane or propane used according to the designed filling amount when injecting the refrigerant, and closes the valve and stands for 3-5 minutes after injection to allow the refrigerant to fully diffuse and balance, which helps to improve the uniformity of refrigerant distribution, improve the operating stability of the refrigeration system, and reduce energy efficiency losses caused by uneven refrigerant distribution.

[0078] The refrigeration pipe 1 after being injected with refrigerant is assembled into the refrigerator cabinet.

[0079] The assembled refrigerator cabinet is subjected to a refrigeration performance test to check whether the refrigeration performance of the refrigerator cabinet is qualified.

[0080] In some embodiments, when testing the refrigeration performance of an assembled refrigerator cabinet, the refrigeration system is first started to enter a normal operating state, and then the temperature drop curve of the refrigerator and freezer compartments is monitored within a set time, while the compressor operating parameters and system pressure values are recorded. Finally, the measured data is compared with the standard performance indicators to determine whether the refrigeration performance is qualified.

[0081] It should be understood that after the assembled refrigerator cabinet undergoes refrigeration performance testing, the outer packaging can be assembled. This outer packaging assembly step includes first moving the refrigerator cabinet that has passed the performance test to the packaging station, then sequentially installing the pre-prepared cushioning and protective materials, the outer packaging box, and fixing components. Finally, the packaging is tightened and sealed using packaging equipment to complete the product's pre-shipment protective treatment. This assembly process ensures product transportation safety while maintaining an efficient connection between packaging operations and the production line.

[0082] After confirming that there is no leakage in the refrigeration pipe 1, the above method further performs vacuum treatment and injects refrigerant, and then assembles it to the refrigerator cabinet and performs a refrigeration performance test, which helps to improve the sealing and operational reliability of the refrigeration system, while reducing the refrigerant loss caused by leakage, thereby improving the overall refrigeration efficiency and quality stability of the refrigerator cabinet.

[0083] In some embodiments, if the air pressure values at both ends of the refrigeration pipe 1 are inconsistent, the method further includes:

[0084] Re-weld the refrigeration pipe 1 with inconsistent air pressure values;

[0085] Repeat the process of detecting the air pressure values at both ends of the refrigeration pipe 1 by using the first barometer 2 and the second barometer 3 until the air pressure values at both ends of the refrigeration pipe 1 are consistent.

[0086] When the above method detects that the air pressure values at both ends of the refrigeration pipe 1 are inconsistent, the leakage point can be corrected in time by re-welding and repeatedly detecting the air pressure values until they are consistent, reducing the refrigerant loss caused by welding defects, and at the same time improving the sealing of the refrigeration pipe 1 and the reliability of subsequent assembly.

[0087] In some embodiments, before comparing the air pressure values at both ends of the refrigeration pipe 1 to see whether they are consistent, the method further includes:

[0088] After the compressed air introduced into the refrigeration pipe 1 reaches a predetermined pressure, the predetermined pressure is maintained for a preset holding time of at least 5 minutes; wherein the predetermined pressure is 0.8-1.2 MPa;

[0089] During the preset pressure holding time, the air pressure changes at both ends of the refrigeration pipe 1 are monitored and recorded in real time;

[0090] When the preset pressure holding time is reached, if the pressure values at both ends of the refrigeration pipe 1 decrease by no more than 3% of the initial pressure value, the pressure values at both ends of the refrigeration pipe 1 are compared to see whether they are consistent.

[0091] The above method sets a pressure holding stage of 0.8-1.2MPa and maintains it for at least 5 minutes before air pressure testing. By monitoring the air pressure changes in real time, the pressure stability of the pipeline system can be confirmed before the formal comparison of the air pressure values at both ends, thereby improving the accuracy of leak detection, reducing misjudgments caused by instantaneous pressure fluctuations, and providing a more reliable data basis for subsequent air pressure value comparisons.

[0092] In some embodiments, the first pressure gauge 2 or the second pressure gauge 3 is a pointer-type or digital pressure gauge.

[0093] Using pointer or digital pressure gauge as the detection device, the pressure gauge type can be flexibly selected according to actual needs to adapt to the requirements of different detection environments, while ensuring the accuracy and reliability of air pressure detection data, providing an effective measurement method for the sealing evaluation of refrigeration pipeline 1.

[0094] Some embodiments of the present application also provide a refrigerator cabinet refrigeration pipeline leak detection system, which is applicable to the refrigerator cabinet refrigeration pipeline leak detection method described in the above embodiment, and the system includes: an air compressor 5, a first air pressure gauge 2 and a second air pressure gauge 3;

[0095] The air compressor 5 is connected to one end of the refrigeration pipe 1 through the connecting air pipe 4, and the air compressor 5 is used to inject compressed air into the refrigeration pipe 1 to a predetermined pressure;

[0096] The first barometer 2 is connected to the first end of the refrigeration pipe 1, and the second barometer 3 is connected to the second end of the refrigeration pipe 1; the first barometer 2 and the second barometer 3 are used to respectively detect the air pressure values at both ends of the refrigeration pipe 1, so as to determine whether there is any leakage in the refrigeration pipe 1 according to the air pressure values at both ends of the refrigeration pipe 1.

[0097] The refrigerator cabinet refrigeration pipe leak detection system injects compressed air into the pipe through an air compressor 5 and uses a first barometer 2 and a second barometer 3 respectively provided at both ends of the pipe to synchronously detect the air pressure value. It can quickly and accurately determine the sealing status of the pipe, thereby reducing manual detection errors, improving detection efficiency, and providing reliable technical support for the quality control of the refrigeration system.

[0098] In some embodiments, the air compressor 5 is equipped with a pressure regulating module for stabilizing the compressed air pressure within the range of 0.8-1.2 MPa;

[0099] The system further comprises a timing module for starting a pressure holding timer of at least 5 minutes after a predetermined pressure is reached.

[0100] The system uses a pressure regulating module to stably control the compressed air pressure within the range of 0.8-1.2MPa, and cooperates with the timing module to achieve accurate pressure-maintaining timing function, which helps maintain the stability of the detection pressure, improves the accuracy of leakage judgment, and provides a standardized operating procedure for pipeline sealing detection.

[0101] In some embodiments, a data processor is connected between the first barometer 2 and the second barometer 3, and the data processor is configured to:

[0102] Calculate the difference in air pressure between the two ends of the refrigeration pipe 1 in real time;

[0103] When the air pressure at both ends of the refrigeration pipe 1 drops by more than 3% of the initial value or the difference in air pressure at both ends of the refrigeration pipe 1 exceeds a threshold value within the preset pressure holding time, a leakage alarm is triggered.

[0104] It should be understood that the initial value refers to the air pressure value when the pressure holding time is started.

[0105] The system uses a data processor to calculate and compare the difference in air pressure and the pressure drop at both ends of the refrigeration pipe 1 in real time, triggering an alarm when an abnormal situation is detected. It can promptly identify potential leakage risks, improve the degree of automation of the detection process, reduce human judgment errors, and enhance the reliability of the detection results.

[0106] In some embodiments, the system further includes a quick switching interface linked to the air compressor 5, which is used to directly connect to a vacuum pump for vacuuming when it detects that the air pressure values at both ends of the refrigeration pipe 1 are consistent.

[0107] The system is provided with a quick switching interface linked to the air compressor 5, which can immediately switch to the vacuum pump for vacuuming after confirming that the pipeline is sealed. This helps to optimize the connection efficiency between detection and subsequent processing, reduce equipment switching time, and at the same time maintain the closed state of the pipeline system, thereby improving the continuity of the overall process flow.

[0108] In some embodiments, the connecting gas pipe 4 is made of explosion-proof material, and the output end of the air compressor 5 is provided with a combustible gas concentration sensor, which automatically cuts off the gas source when it detects that the concentration of isobutane or propane exceeds a safety threshold.

[0109] It should be understood that the specific numerical range of the safety threshold is determined based on the lower explosive limit (LEL) standards for isobutane / propane, industry safety regulations, and equipment operating parameters. It is typically set at 20%-40% of the lower explosive limit concentration of the combustible gas (for example, if the isobutane LEL is 1.8%, the safety threshold can be set within the range of 0.36%-0.72% by volume). This threshold range provides reliable safety redundancy while ensuring detection sensitivity. Specific implementation must comply with explosion-proof electrical standards.

[0110] By using a connecting gas pipe 4 made of explosion-proof material and configuring a combustible gas concentration sensor, the gas source can be automatically cut off when it is detected that the isobutane or propane concentration exceeds the safety threshold, thereby reducing the safety risks caused by flammable refrigerant leakage, improving the safety protection level of the detection process, and ensuring the safety of operators and equipment.

[0111] It can be seen from the above technical solution that the embodiment of the present application provides a refrigerator cabinet refrigeration pipe leak detection system and method, the system includes an air compressor 5, a first barometer 2 and a second barometer 3; the air compressor 5 is connected to one end of the refrigeration pipe 1 through a connecting air pipe 4; the first barometer 2 is connected to the first end of the refrigeration pipe 1, and the second barometer 3 is connected to the second end of the refrigeration pipe 1; after the refrigeration pipe 1 is welded, compressed air is first introduced into one end of the refrigeration pipe 1 through the air compressor 5 to a predetermined pressure; then the air pressure values at both ends of the refrigeration pipe 1 are respectively detected by the first barometer 2 and the second barometer 3; the air pressure values at both ends of the refrigeration pipe 1 are compared to see whether they are consistent: if the air pressure values at both ends of the refrigeration pipe 1 are consistent, then there is no leakage in the refrigeration pipe 1; if the air pressure values at both ends of the refrigeration pipe 1 are inconsistent, then there is a leakage in the refrigeration pipe 1, so as to solve the problem of repeated work and refrigerant waste caused by rework of the refrigerator cabinet refrigeration pipe due to leakage.

[0112] Similar parts between the embodiments provided in this application can be referenced to each other. The specific implementation methods provided above are only a few examples under the overall concept of this application and do not constitute a limitation on the scope of protection of this application. For those skilled in the art, any other implementation methods expanded based on the scheme of this application without expending creative work shall fall within the scope of protection of this application.

Claims

1. A method for detecting leaks in refrigeration pipes of refrigerator cabinets, characterized in that: The method comprises: After the refrigeration pipe (1) is welded, compressed air is introduced into one end of the refrigeration pipe (1) through an air compressor (5) to a predetermined pressure; A first air pressure gauge (2) and a second air pressure gauge (3) are respectively provided at both ends of the refrigeration pipe (1); The air pressure values at both ends of the refrigeration pipe (1) are respectively detected by the first air pressure gauge (2) and the second air pressure gauge (3); Compare the air pressure values at both ends of the refrigeration pipe (1) to see if they are consistent: If the air pressure values at both ends of the refrigeration pipe (1) are consistent, then there is no leakage in the refrigeration pipe (1); If the air pressure values at both ends of the refrigeration pipe (1) are inconsistent, the refrigeration pipe (1) has a leakage phenomenon.

2. The refrigerator cabinet refrigeration pipe leak detection method according to claim 1, characterized in that: If the air pressure values at both ends of the refrigeration pipe (1) are consistent, the method further comprises: Performing a vacuum treatment on the refrigeration pipe (1); injecting refrigerant into the vacuumed refrigeration pipe (1); Assembling the refrigeration pipe (1) after the refrigerant is injected into the refrigerator cabinet; The assembled refrigerator cabinet is subjected to a refrigeration performance test to check whether the refrigeration performance of the refrigerator cabinet is qualified.

3. The refrigerator cabinet refrigeration pipe leak detection method according to claim 2, characterized in that: The step of injecting refrigerant into the vacuumed refrigeration pipe (1) comprises: Inject the refrigerant according to the designed charge amount of the refrigeration system, wherein the refrigerant is isobutane or propane; After the refrigerant injection is completed, the valve of the refrigeration pipe (1) is closed and left to stand for 3-5 minutes to allow the refrigerant to fully diffuse and balance in the refrigeration pipe (1).

4. The refrigerator cabinet refrigeration pipe leak detection method according to claim 1, characterized in that: If the air pressure values at both ends of the refrigeration pipe (1) are inconsistent, the method further comprises: Re-weld the refrigeration pipes (1) with inconsistent air pressure values; Repeatedly detecting the air pressure values at both ends of the refrigeration pipe (1) using the first air pressure gauge (2) and the second air pressure gauge (3) until the air pressure values at both ends of the refrigeration pipe (1) are consistent.

5. The refrigerator cabinet refrigeration pipe leak detection method according to claim 1, characterized in that: Before comparing the air pressure values at both ends of the refrigeration pipe (1) to determine whether they are consistent, the method further comprises: After the compressed air introduced into the refrigeration pipe (1) reaches a predetermined pressure, the predetermined pressure is maintained for a preset pressure holding time of at least 5 minutes; wherein the predetermined pressure is 0.8-1.2 MPa; During a preset pressure holding time, real-time monitoring and recording of changes in air pressure at both ends of the refrigeration pipe (1); When the preset pressure holding time is reached, if the air pressure values at both ends of the refrigeration pipe (1) decrease by no more than 3% of the initial air pressure value, the air pressure values at both ends of the refrigeration pipe (1) are compared to determine whether they are consistent.

6. The refrigerator cabinet refrigeration pipe leak detection method according to claim 1, characterized in that: The first barometer (2) or the second barometer (3) is a pointer-type or digital pressure gauge.

7. A refrigerator cabinet refrigeration pipe leak detection system, characterized in that: A method for detecting leaks in refrigeration pipes of a refrigerator cabinet applicable to any one of claims 1 to 6, wherein the system comprises: an air compressor (5), a first pressure gauge (2), and a second pressure gauge (3); The air compressor (5) is connected to one end of the refrigeration pipe (1) via a connecting air pipe (4), and the air compressor (5) is used to inject compressed air into the refrigeration pipe (1) to a predetermined pressure; The first barometer (2) is connected to the first end of the refrigeration pipe (1), and the second barometer (3) is connected to the second end of the refrigeration pipe (1); the first barometer (2) and the second barometer (3) are used to respectively detect the air pressure values at both ends of the refrigeration pipe (1), so as to determine whether the refrigeration pipe (1) has leakage according to the air pressure values at both ends of the refrigeration pipe (1).

8. The refrigerator cabinet refrigeration pipe leak detection system according to claim 7, characterized in that: The air compressor (5) is equipped with a pressure regulating module for stabilizing the compressed air pressure within the range of 0.8-1.2 MPa; The system further comprises a timing module for starting a pressure holding timer of at least 5 minutes after a predetermined pressure is reached.

9. The refrigerator cabinet refrigeration pipe leak detection system according to claim 7, characterized in that: A data processor is connected between the first barometer (2) and the second barometer (3), and the data processor is configured to: Calculating the difference in air pressure between the two ends of the refrigeration pipe (1) in real time; When, within the preset pressure holding time, the air pressure values at both ends of the refrigeration pipe (1) decrease by more than 3% of the initial value or the difference in air pressure values at both ends of the refrigeration pipe (1) exceeds a threshold, a leakage alarm is triggered.

10. The refrigerator cabinet refrigeration pipe leak detection system according to claim 7, characterized in that: It also includes a quick switching interface linked to the air compressor (5), which is used to directly connect to the vacuum pump for vacuuming when it detects that the air pressure values at both ends of the refrigeration pipeline (1) are consistent.

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