An automatic electronic leak detection system and a method for leak detection of a refrigeration appliance

Abstract

This invention provides an automatic electronic leak detection system and a leak detection method for refrigeration appliances, belonging to the field of refrigeration equipment testing technology. The system includes a first conveyor line for transporting refrigeration appliances, a leak detection box, and a handling device. A leak detection station is provided on the first conveyor line, and the leak detection box can be placed on the refrigeration appliance. The handling device is used to place the leak detection box on the refrigeration appliance or remove the leak detection box from the refrigeration appliance. When the refrigeration appliance with the leak detection box passes the leak detection station, it is automatically leak-tested. The leak detection method includes the following steps: transporting the refrigeration appliance; placing the leak detection box on the refrigeration appliance; transporting the refrigeration appliance with the leak detection box to the leak detection station for leak detection; after leak detection is completed, removing the leak detection box and sending the refrigeration appliance to the next process. This leak detection system automates leak detection of refrigeration appliances, overcoming the shortcomings of manual leak detection which is prone to missed detections, effectively improving the leak detection efficiency of refrigeration appliances and ensuring the reliability of the leak detection results.

Description

Technical Field

[0001] This invention relates to the field of refrigeration equipment testing technology, and in particular to an automatic electronic leak detection system and a leak detection method for refrigeration appliances. Background Technology

[0002] To ensure product quality, leak testing is required during the production of refrigeration appliances. Leak testing primarily involves using a leak detection gun to check for leaks in the welded refrigeration pipes of the appliance. Currently, leak testing for refrigeration appliances is typically done manually using a leak detection gun. This method suffers from the unpredictability of manual operation and is inefficient, failing to meet the requirements of high-efficiency production.

[0003] Existing technology CN112037190A discloses an intelligent weld point leak detection system and method for refrigerant pipelines in electrical appliances. The leak detection system includes: a robotic arm, a camera module, a leak detection gun, a computer system, and a production line; the robotic arm and the camera module are both fixed to one side of the production line; the leak detection gun is connected to the end of the robotic arm; the computer system is electrically connected to the camera module, the robotic arm, and the leak detection gun. The leak detection method uses a camera to capture images of the refrigerant and performs image recognition. Leak detection is performed by comparing the camera's world coordinates with the robotic arm's world coordinates of the refrigerant pipeline weld points, which can reduce missed or incorrect detections caused by worker fatigue. However, this leak detection method requires high image accuracy and computing power, which is not conducive to widespread use. Summary of the Invention

[0004] To overcome the problems existing in related technologies, one of the objectives of this invention is to provide an automatic electronic leak detection system. This system automatically detects leaks in refrigeration appliances, overcomes the shortcomings of manual leak detection which is prone to missing leaks, and effectively improves the leak detection efficiency of refrigeration appliances and ensures the reliability of leak detection results.

[0005] An automatic electronic leak detection system includes:

[0006] A first conveyor line, used for transporting refrigeration appliances, includes a leak detection station and further comprises:

[0007] Leak detection box, which can be mounted on refrigeration appliances;

[0008] A transport device is used to place the leak detection box on the refrigeration appliance or to move the leak detection box off the refrigeration appliance; when the refrigeration appliance covered with the leak detection box passes the leak detection station, it is detected for leaks by the leak detection station.

[0009] In a preferred embodiment of the present invention, the leak detection system further includes:

[0010] The second conveyor line, located on one side of the first conveyor line, is used to transport the leak detection box, and the conveying direction of the second conveyor line is opposite to that of the first conveyor line.

[0011] In a preferred embodiment of the present invention, two conveying devices are provided, and along the conveying direction of the first conveying line, one of the conveying devices is located upstream of the leak detection station, and is used to place the leak detection box on the second conveying line onto the refrigeration appliance.

[0012] Another of the aforementioned conveying devices is located downstream of the leak detection station and is used to place the leak detection box on the refrigeration appliance onto the second conveyor line.

[0013] In a preferred embodiment of the present invention, the conveying device includes a conveying support, a lifting drive device, and a suction device. The conveying support spans across the first conveying line and the second conveying line. The lifting drive device is movably mounted on the conveying support. The suction device is mounted on the lifting drive device, and the lifting drive device drives the suction device to move up and down.

[0014] In a preferred embodiment of the present invention, the suction device includes a suction cup, a vacuum generator, and a pressure sensor. The vacuum generator is fixed on the lifting drive device, the suction cup is disposed on the vacuum generator, and the pressure sensor is connected to the suction cup.

[0015] In a preferred embodiment of the present invention, the conveying device located upstream of the leak detection station is provided with a first box picking station and a first box placing station. The first box picking station is located above the second conveyor line, and the first box placing station is located above the first conveyor line.

[0016] The conveying device located downstream of the leak detection station is provided with a second box picking station and a second box placing station. The second box picking station is located above the first conveyor line, and the second box placing station is located above the second conveyor line.

[0017] Each box retrieval station and each box placement station is equipped with a photoelectric positioning sensor.

[0018] In a preferred embodiment of the present invention, a stopper is provided in the leak detection station, and the stopper is located at the bottom of the first conveyor line; the stopper includes a drive motor and a baffle, the drive motor is located at the bottom of the first conveyor line, the baffle is located at the output end of the drive motor, and the drive motor drives the baffle to move up and down.

[0019] In a preferred embodiment of the present invention, leak detection holes are provided on both opposite side walls of the leak detection box.

[0020] In a preferred embodiment of the present invention, the leak detection station includes two leak detection sections arranged opposite to each other, the two leak detection sections being respectively arranged on both sides of the first conveyor line, and each leak detection section being provided with two leak detection guns.

[0021] A second objective of this invention is to provide a leak detection method for refrigeration appliances. This leak detection method is implemented based on the automatic electronic leak detection system described above, and includes the following steps:

[0022] Transporting refrigeration appliances;

[0023] Install a leak detection box on the refrigeration appliance;

[0024] The refrigeration appliances covered with the leak detection box are transported to the leak detection station for leak detection.

[0025] Once the leak test is complete, remove the leak test box and move the refrigeration appliances to the next process.

[0026] The beneficial effects of this invention are as follows:

[0027] This invention provides an automatic electronic leak detection system, comprising a first conveyor line for transporting refrigeration appliances, a leak detection box, and a handling device. A leak detection station is located on the first conveyor line, and the leak detection box is placed over the refrigeration appliance. The handling device is used to place the leak detection box on the refrigeration appliance or remove the leak detection box from the refrigeration appliance. During the detection process, the refrigeration appliance is transported by the first conveyor line, and the handling device places the leak detection box behind it. As the refrigeration appliance with the leak detection box passes the leak detection station, it is automatically leak-tested. By using a leak detection box, the system ensures that the detection process of the refrigeration appliance takes place in a closed space, which reduces interference from the external environment and ensures the reliability and accuracy of the test results. Furthermore, the entire system uses a coordinated operation of the conveyor line and the handling device, eliminating the need for manual inspection by workers. This achieves full automation of electronic leak detection and effectively improves the detection efficiency of refrigeration appliances.

[0028] This application also provides a leak detection method for refrigeration appliances based on the above-mentioned leak detection system. This method is highly automated, requires no manual operation, and can improve detection efficiency and ensure the reliability of detection results. Attached Figure Description

[0029] Figure 1 This is a perspective view of the automatic electronic leak detection system provided by the present invention;

[0030] Figure 2 This is a top view of the automatic electronic leak detection system provided by the present invention;

[0031] Figure 3 This is a top view of the leak detection part provided by the present invention;

[0032] Figure 4 This is a schematic diagram of the structure of the suction device for absorbing the leak detection box provided by the present invention;

[0033] Figure 5 This is a schematic diagram of the leak detection box provided by the present invention;

[0034] Figure 6 This is a schematic diagram of the structure of the blocker provided by the present invention;

[0035] Figure 7 This is a flowchart of the leak detection method for refrigeration appliances provided by the present invention.

[0036] Figure label:

[0037] 100. First conveyor line; 110. First box picking station; 120. First box placement station; 130. Second box picking station; 140. Second box placement station; 150. Photoelectric positioning sensor; 200. Second conveyor line; 300. Handling device; 310. Handling bracket; 320. Suction device; 3201. Vacuum generator; 3202. Pressure sensor; 3203. Suction cup; 330. Lifting drive device; 400. Refrigeration appliance; 500. Leak detection box; 510. Leak detection hole; 600. Leak detection station; 610. Leak detection part; 6101. Leak detection gun; 700. Blocker; 710. Drive motor; 720. Baffle. Detailed Implementation

[0038] Preferred embodiments of the invention will now be described in more detail with reference to the accompanying drawings. While preferred embodiments of the invention are shown in the drawings, it should be understood that the invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the invention will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

[0039] The terminology used in this invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular forms “a,” “the,” and “the” as used in this invention and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0040] It should be understood that although the terms "first," "second," "third," etc., may be used in this invention to describe various information, this information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, without departing from the scope of this invention, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Thus, features defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0041] Example

[0042] like Figures 1-6 As shown, this application proposes an automatic electronic leak detection system, comprising:

[0043] A first conveyor line 100 is used to transport a refrigeration appliance 400. The first conveyor line 100 is equipped with a leak detection station 600, and also includes a leak detection box 500 and a conveying device 300. The leak detection box 500 can cover the refrigeration appliance 400. The leak detection box 500 is cuboid in shape and has leak detection holes 510, allowing testing tools to pass through the leak detection holes 510 and inspect the refrigeration appliance 400.

[0044] The conveying device 300 is used to place the leak detection box 500 on the refrigeration appliance 400 or to move the leak detection box 500 off the refrigeration appliance 400; when the refrigeration appliance 400 covered with the leak detection box 500 passes the leak detection station 600, it is detected by the leak detection station 600, specifically by the leak detection gun 6101 of the leak detection station 600.

[0045] The refrigeration appliance 400 of this application can be an air conditioner or refrigerator, or other electrical appliances. The conveying device 300 can be a multi-axis mechanical arm, with the multi-axis manipulator positioned on one side of the first conveyor line 100. Before leak testing, it is used to grip the leak detection box 500 and place it on the refrigeration appliance 400, creating a relatively sealed space within the appliance to reduce the influence of external factors on the test results. After testing, the conveying device 300 removes the leak detection box 500 from the appliance 400, and the appliance 400 is transported to the next process via the first conveyor line 100.

[0046] The aforementioned automatic electronic leak detection system includes a first conveyor line 100 for transporting a refrigeration appliance 400, a leak detection box 500, and a handling device 300. A leak detection station 600 is provided on the first conveyor line 100, and the leak detection box 500 is placed over the refrigeration appliance 400. The handling device 300 is used to place the leak detection box 500 on the refrigeration appliance 400 or remove the leak detection box 500 from the refrigeration appliance 400. During the detection process, the refrigeration appliance 400 is transported by the first conveyor line 100. After the handling device 300 places the leak detection box 500 on the refrigeration appliance 400, the refrigeration appliance 400, covered with the leak detection box 500, is automatically leak-detected as it passes the leak detection station 600. By setting up the leak detection box 500, the system ensures that the detection process of the refrigeration appliance 400 is carried out in a closed space, which reduces the interference of the external environment on the detection results and ensures the reliability and accuracy of the test results. Moreover, the entire system uses a 300-unit linkage of conveyor lines and handling devices, eliminating the need for manual inspection by workers. This achieves full automation of electronic leak detection and effectively improves the detection efficiency of refrigeration appliances.

[0047] In a preferred embodiment, the leak detection system further includes a second conveyor line 200 located to one side of the first conveyor line 100 for transporting the leak detection box 500. The conveying direction of the second conveyor line 200 is opposite to that of the first conveyor line 100. The second conveyor line 200 cooperates with the first conveyor line 100, with its outlet end close to the inlet end of the first conveyor line 100. Before leak detection, the second conveyor line 200 transports the leak detection box 500 to the side near the inlet end of the first conveyor line 100, making it convenient for the handling device 300 to transport the leak detection box 500 onto the refrigeration appliance 400. After leak detection, the conveying device removes the leak detection box 500 from the refrigeration appliance 400 and places it at the inlet end of the second conveyor line 200. The second conveyor line 200 then transports the leak detection box 500 to the side near the inlet end of the first conveyor line 100, preparing it for the next refrigeration appliance 400 to be tested.

[0048] This application sets up two conveyor lines to form a loop for transporting the leak detection box 500 and the refrigeration appliance 400, so that the leak detection box 500 can be used multiple times, which helps to improve the detection efficiency.

[0049] Furthermore, two conveying devices 300 are provided, and along the conveying direction of the first conveying line 100, one of the conveying devices 300 is located upstream of the leak detection station 600, for placing the leak detection box 500 on the second conveying line 200 onto the refrigeration appliance 400.

[0050] Another of the aforementioned conveying devices 300 is located downstream of the leak detection station 600 and is used to place the leak detection box 500 on the refrigeration appliance 400 onto the second conveyor line 200.

[0051] The two conveying devices 300 can have the same structure. The conveying device 300 connects the first conveyor line 100 and the second conveyor line 200, so that the two conveyor lines and the two conveying devices 300 form a closed-loop leak detection station. Before leak detection, the leak detection box 500 can be automatically placed on the refrigeration appliance 400. After leak detection, the leak detection box 500 can also be automatically removed from the refrigeration appliance 400, which improves the leak detection efficiency of the refrigeration appliance 400.

[0052] More specifically, the conveying device 300 includes a conveying bracket 310, a lifting drive device 330, and a suction device 320. The conveying bracket 310 spans across the first conveying line 100 and the second conveying line 200. The lifting drive device 330 is movably mounted on the conveying bracket 310. The suction device 320 is mounted on the lifting drive device 330, and the lifting drive device 330 drives the suction device 320 to move up and down.

[0053] The length of the transport bracket 310 is arranged along the width of the two conveyor lines. The movement of the lifting drive device 330 on the transport bracket 310 is achieved by a motor and a slider. Specifically, the transport bracket 310 is provided with a guide rail, and a slider is provided on the guide rail. The lifting drive device 330 is mounted on the slider, and the motor drives the slider to slide, thereby moving the lifting drive device 330. The lifting drive device 330 includes a cylinder, which is used to drive the suction device 320 to move up and down above the two conveyor lines. The suction device 320 is used to suction the leak detection box 500.

[0054] In a more specific embodiment, the suction device 320 includes a suction cup 3203, a vacuum generator 3201, and a pressure sensor 3202. The vacuum generator 3201 is fixed on the lifting drive device 330, the suction cup 3203 is disposed on the vacuum generator 3201, and the pressure sensor 3202 is connected to the suction cup 3203.

[0055] The vacuum generator 3201 is used to perform a vacuuming operation on the suction cup 3203, enabling the suction cup 3203 to pick up the leak detection box 500. The pressure sensor 3202 is used to detect the air pressure inside the suction cup 3203. Only after the pressure value inside the suction cup 3203 reaches the required pressure value is it determined that the suction cup 3203 has either picked up the leak detection box 500 or has put the leak detection box 500 down.

[0056] Specifically, the leak detection system includes a control system electrically connected to a pressure sensor 3202. When the suction cup 3203 picks up the leak detection box 500, the pressure inside the suction cup 3203 decreases. When the pressure in the suction cup 3203 is less than a set value, the control system determines that the suction cup 3203 has picked up the leak detection box 500, and the vacuum generator 3201 stops operating. After the suction device 320 and the lifting drive device 330 move into position, the vacuum generator 3201 introduces air into the suction cup 3203, and the air pressure in the suction cup 3203 gradually increases. When the pressure in the suction cup 3203 is greater than the set value, the control system determines that the leak detection box 500 has been lowered, and the vacuum generator 3201 stops operating.

[0057] Furthermore, the conveying device 300 located upstream of the leak detection station 600 is provided with a first box picking station 110 and a first box placing station 120. The first box picking station 110 is located above the second conveyor line 200, and the first box placing station 120 is located above the first conveyor line 100.

[0058] The conveying device 300 located downstream of the leak detection station 600 is provided with a second box picking station 130 and a second box placing station 140. The second box picking station 130 is located above the first conveyor line 100, and the second box placing station 140 is located above the second conveyor line 200. Each box picking station and each box placing station is provided with a photoelectric positioning sensor 150.

[0059] The box retrieval station and box placement station are used by the handling device 300 to pick up or put down the leak detection box 500. The photoelectric position sensor 150 set on each box retrieval station or box placement station is used to determine whether the lifting drive device 330 has moved to the designated position. When the lifting drive device 330 moves to the designated position, the picking device 320 will perform the box retrieval or box placement operation.

[0060] Specifically, when the lifting drive device 330 moves to the first box-retrieving station 110, it drives the suction device 320 downward to pick up the leak detection box 500 on the second conveyor line 200. Then, the lifting drive device 330 moves on the transport bracket 310 to the first box-placing station 120, and drives the suction device 320 downward. The suction device 320 places the picked-up leak detection box 500 onto the refrigeration appliance 400, thus completing the sealing action of the refrigeration appliance 400. The sealed refrigeration appliance 400 is then leak-tested at the leak detection station 600. At the second box-retrieving station 130, the leak detection box 500 is picked up by the suction device 320, completing the unpacking action. Then, the lifting drive device 330 moves the suction device 320, which is carrying the leak detection box 500, to the second box-placing station 140, placing the leak detection box 500 onto the second conveyor line 200.

[0061] Furthermore, a blocker 700 is provided in the leak detection station 600, and the blocker 700 is located at the bottom of the first conveyor line 100. The blocker 700 includes a drive motor 710 and a baffle 720. The drive motor 710 is located at the bottom of the first conveyor line 100, and the baffle 720 is located at the output end of the drive motor 710. The drive motor 710 drives the baffle 720 to move up and down. A photoelectric position sensor 150 is also provided in the leak detection station 600. When the photoelectric position sensor 150 detects that the refrigeration appliance 400 has entered the leak detection station 600, the baffle 720 moves upward to block the refrigeration appliance 400 for detection. In a more specific embodiment, the blocker 700 is also provided on the first conveyor line 100 corresponding to the first box placement station 120 and the second box removal station 130.

[0062] Furthermore, leak detection holes 510 are provided on both opposite side walls of the leak detection box 500. Even further, the leak detection station 600 includes two oppositely arranged leak detection parts 610, each located on one side of the first conveyor line 100, and each leak detection part 610 is equipped with two leak detection guns 6101. Each side wall of the leak detection box 500 can have two leak detection holes 510, meaning each of the two holes corresponds to one of the two leak detection guns 6101. The two leak detection parts 610, totaling four leak detection guns 6101, can detect the refrigeration appliance 400, improving detection efficiency and ensuring the accuracy of the detection results. It should be noted that the detection principle of the leak detection gun 6101 in this application is the same as that of existing leak detection guns 6101; therefore, its working principle will not be described in detail here.

[0063] like Figure 7As shown, this application also provides a leak detection method for a refrigeration appliance 400. The leak detection method is implemented based on the automatic electronic leak detection system described above, and the leak detection method includes the following steps:

[0064] S100, transporting refrigeration appliances 400; this step is completed using the first conveyor line 100.

[0065] S200, a leak detection box 500 is placed over the refrigeration appliance 400; this step is accomplished using the transport device 300.

[0066] S300, transport the refrigeration appliance 400 covered with the leak detection box 500 to the leak detection station 600 for leak detection;

[0067] S400, Leak detection complete. Remove the leak detection box 500 and send the refrigeration appliance 400 to the next process. The removal of the leak detection box 500 is also carried out using the transport device 300.

[0068] This leak detection method is highly automated, requires no manual operation, and can improve detection efficiency and ensure the reliability of detection results.

[0069] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this application. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings. In the description of this application, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this application; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0070] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0071] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this application.

[0072] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An automatic electronic leak detection system, comprising: A first conveyor line (100) for transporting refrigeration appliances (400), the first conveyor line (100) being provided with a leak detection station (600), characterized in that it further includes: A leak detection box (500) that can be mounted on a refrigeration appliance (400); Before leak detection, the transport device (300) is used to clamp the leak detection box (500) and place the leak detection box (500) on the refrigeration appliance (400). After the detection is completed, the transport device (300) moves the leak detection box (500) off the refrigeration appliance (400). When the refrigeration appliance (400) covered with the leak detection box (500) passes the leak detection station (600), it is leaked by the leak detection station (600).

2. The automatic electronic leak detection system according to claim 1, characterized in that: Also includes: The second conveyor line (200) is located on one side of the first conveyor line (100) and is used to transport the leak detection box (500). The conveying direction of the second conveyor line (200) is opposite to that of the first conveyor line (100).

3. The automatic electronic leak detection system according to claim 2, characterized in that: Two conveying devices (300) are provided, and along the conveying direction of the first conveying line (100), one of the conveying devices (300) is located upstream of the leak detection station (600) and is used to place the leak detection box (500) on the second conveying line (200) onto the refrigeration appliance (400). Another of the aforementioned conveying devices (300) is located downstream of the leak detection station (600) for placing the leak detection box (500) on the refrigeration appliance (400) onto the second conveyor line (200).

4. The automatic electronic leak detection system according to claim 3, characterized in that: The conveying device (300) includes a conveying bracket (310), a lifting drive device (330), and a suction device (320). The conveying bracket (310) spans across the first conveying line (100) and the second conveying line (200). The lifting drive device (330) is movably mounted on the conveying bracket (310). The suction device (320) is mounted on the lifting drive device (330). The lifting drive device (330) drives the suction device (320) to move up and down.

5. The automatic electronic leak detection system according to claim 4, characterized in that: The suction device (320) includes a suction cup (3203), a vacuum generator (3201), and a pressure sensor (3202). The vacuum generator (3201) is fixed on the lifting drive device (330), the suction cup (3203) is disposed on the vacuum generator (3201), and the pressure sensor (3202) is connected to the suction cup (3203).

6. The automatic electronic leak detection system according to claim 4, characterized in that: The conveying device (300) located upstream of the leak detection station (600) is provided with a first box picking station (110) and a first box placing station (120). The first box picking station (110) is located above the second conveyor line (200), and the first box placing station (120) is located above the first conveyor line (100). The conveying device (300) located downstream of the leak detection station (600) is provided with a second box picking station (130) and a second box placing station (140). The second box picking station (130) is located above the first conveyor line (100), and the second box placing station (140) is located above the second conveyor line (200). Each box retrieval station and each box placement station is equipped with a photoelectric positioning sensor (150).

7. The automatic electronic leak detection system according to claim 6, characterized in that: The leak detection station (600) is equipped with a blocker (700), which is located at the bottom of the first conveyor line (100). The blocker (700) includes a drive motor (710) and a baffle (720). The drive motor (710) is located at the bottom of the first conveyor line (100), and the baffle (720) is located at the output end of the drive motor (710). The drive motor (710) drives the baffle (720) to move up and down.

8. The automatic electronic leak detection system according to any one of claims 1-7, characterized in that: Leak detection holes (510) are provided on both opposite side walls of the leak detection box (500).

9. The automatic electronic leak detection system according to claim 8, characterized in that: The leak detection station (600) includes two leak detection sections (610) arranged opposite to each other. The two leak detection sections (610) are respectively arranged on both sides of the first conveyor line (100), and each leak detection section (610) is provided with two leak detection guns (6101).

10. A leak detection method for a refrigeration appliance (400), characterized in that: The leak detection method is implemented based on the automatic electronic leak detection system as described in any one of claims 1-9, and the leak detection method includes the following steps: Transporting refrigeration appliances (400); A leak detection box (500) is installed on the refrigeration appliance (400); The refrigeration appliance (400) covered with the leak detection box (500) is transported to the leak detection station (600) for leak detection; Once the leak detection is complete, remove the leak detection box (500) and send the refrigeration appliance (400) to the next process.

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