Leakage detection device for fin evaporator
By introducing a high-sensitivity pressure sensor and a detachable air intake head design, combined with an electric push rod and a limiting structure, automated leak detection of finned evaporators is achieved, solving the problem of low sensitivity in traditional leak detection devices and improving inspection accuracy and production efficiency.
Patent Information
- Application Number
- CN202520494858.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-20
- Publication Date
- 2026-01-13
- Estimated Expiration
- 2035-03-20
AI Technical Summary
Existing leak detection devices for finned evaporators have low sensitivity, and manual inspection results are unstable, affecting the quality of processing and production.
Employing a high-sensitivity pressure sensor and a detachable air intake head design, combined with an electric push rod and a limiting structure, it achieves automated leak detection, improving inspection accuracy and efficiency.
It significantly improves the leak detection sensitivity and accuracy of finned evaporators, reduces the hassle of manual operation, increases production efficiency, and avoids water pollution problems.
Smart Images
Figure CN223796216U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of leak detection devices, specifically referring to a leak detection device for a finned evaporator. Background Technology
[0002] In the manufacturing process of energy-saving inverter refrigerators and freezers, an evaporator is needed as the refrigerant circulation channel to achieve heat exchange and cooling effects. Finned evaporators are typically used for cooling. During the production of finned evaporators, it is essential to ensure the sealing of the condenser coils. The main reasons for leak detection in finned evaporators are: to maintain system efficiency, as refrigerant leaks lead to decreased system efficiency and increased energy consumption; leak detection helps maintain efficient operation.
[0003] The traditional testing method involves manually sealing both sides of the finned evaporator and immersing it in water one by one, then visually inspecting for the presence of bubbles to check the evaporator's airtightness. This method has low sensitivity, relies on the operator's experience, and small leaks are unlikely to produce noticeable bubbles, leading to missed detections.
[0004] Furthermore, after the inspection is completed, water may contaminate the inside of the evaporator, affecting its subsequent use. Utility Model Content
[0005] The technical problem this invention aims to solve is that the leak detection device for finned evaporators has low sensitivity for sealing tests, and manual inspection has significant limitations, resulting in unstable results and affecting the quality of processing and production.
[0006] The technical solution adopted by this utility model is as follows:
[0007] This utility model discloses a leak detection device for a finned evaporator, comprising a fixed base, a guide rod fixedly connected to the upper part of the fixed base, a test frame movably inserted into the guide rod, and a mounting base located in front of the test frame. A test chamber with an internal cavity is fixedly connected to the upper part of the mounting base. A pressure sensor passes through the upper part of the test chamber, and a display screen is provided above the pressure sensor. A test probe located inside the test chamber is provided at the lower end of the pressure sensor. An air pump fixedly connected to the upper part of the mounting base is connected to one side of the test chamber, and an air inlet head communicating with the finned evaporator is movably inserted into the other end of the test chamber, and the air inlet head is sealed at the connection point by a sealing ring.
[0008] Furthermore, a support base located below the mounting base is fixedly connected to the upper part of the fixed base, and a slide rail that is slidably connected to the mounting base is fixedly connected to the upper part of the support base.
[0009] Furthermore, a connecting plate is fixed between the two sets of support seats, and an electric push rod passes through the connecting plate. A push plate that is fixed to the lower part of the mounting base is vertically fixed to the output end of the electric push rod.
[0010] Furthermore, a limiting plate is fixedly attached to the outer wall of the intake head, and C-shaped slides fixed to the side wall of the detection box are slidably connected to both ends of the limiting plate. A limiting groove is opened on the C-shaped slide, and a limiting block that cooperates with the limiting plate is inserted into the limiting groove.
[0011] Furthermore, a fixed post located outside the C-shaped carriage is fixedly connected to the side wall of the detection chassis, and a return spring is fixedly connected to the fixed post. The other end of the return spring is fixedly connected to the limiting block.
[0012] Furthermore, an electric push rod two is fixedly connected to the upper part of the fixed base and located below the testing table, and the output end of the electric push rod two is fixedly connected to the lower part of the testing table. Both sides of the upper part of the testing table are provided with U-shaped limiting frames arranged in a mirror image. A threaded rod is screwed to the upper part of the U-shaped limiting frame, and a clamping plate is fixedly connected to the lower end of the threaded rod.
[0013] The beneficial effects of this utility model by adopting the above structure are as follows:
[0014] 1. By introducing highly sensitive sensing devices, such as pressure sensors, the sensitivity, accuracy, and efficiency of leak detection for finned evaporators can be significantly improved, while reducing the hassle of submerging them in water for inspection.
[0015] 2. By designing the structure connected to the finned evaporator inspection unit as detachable, it facilitates replacement and maintenance, thereby improving inspection production efficiency. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;
[0017] Figure 2 This is a schematic diagram of the overall structure from another perspective of an embodiment of the present utility model;
[0018] Figure 3 This is a schematic diagram of the structural installation on the inspection chassis;
[0019] Figure 4 This is a reference diagram showing the usage status of the limit plate;
[0020] Figure 5 This is a reference diagram showing the usage status of the electric linear actuator.
[0021] The components include: 1. Fixed base; 11. Guide rod; 12. Testing platform; 2. Mounting base; 21. Testing chassis; 22. Pressure sensor; 23. Display screen; 24. Air pump; 25. Air intake head; 3. Support base; 31. Slide rail; 4. Connecting plate; 41. Electric push rod one; 42. Push plate; 5. Limiting plate; 51. C-shaped slide; 52. Limiting groove; 53. Limiting block; 6. Fixed column; 61. Return spring; 7. Electric push rod two; 71. U-shaped limiting frame; 72. Threaded rod; 73. Clamping plate. Detailed Implementation
[0022] Example 1:
[0023] like Figure 1 , Figure 2 , Figure 3 As shown, the present invention proposes a leak detection device for a finned evaporator, comprising a fixed base 1, a guide rod 11 fixedly connected to the upper part of the fixed base 1, a test stand 12 movably inserted into the guide rod 11, and a mounting base 2 located in front of the test stand 12. A test chamber 21 with an internal cavity is fixedly connected to the upper part of the mounting base 2. A pressure sensor 22 passes through the upper part of the test chamber 21. A display screen 23 is provided on the upper part of the pressure sensor 22. A test probe located inside the test chamber 21 is provided at the lower end of the pressure sensor 22. An air pump 24 fixedly connected to the upper part of the mounting base 2 is connected to one side of the test chamber 21. An air inlet head 25 communicating with the finned evaporator is movably inserted into the other end of the test chamber 21, and the air inlet head 25 is sealed at the connection point by a sealing ring.
[0024] It should be noted that the air outlet of the air inlet head 25 can be connected to and sealed with the leak detection air inlet of the finned evaporator. At this time, the cavity inside the detection housing 21 is connected to the finned evaporator. After the air pump 24 pressurizes the air, it stops. The pressure sensor 22 monitors the internal air pressure. If there is a leak in the finned evaporator itself, the internal air pressure will decrease, and this will be confirmed by displaying it on the screen 23.
[0025] like Figure 2 , 5 As shown, a support base 3 located below the mounting base 2 is fixedly connected to the upper part of the fixed base 1. A slide rail 31 that is slidably connected to the mounting base 2 is fixedly connected to the upper part of the support base 3. A connecting plate 4 is fixedly connected between the two sets of support bases 3. An electric push rod 41 passes through the connecting plate 4. A push plate 42 that is fixedly connected to the lower part of the mounting base 2 is vertically fixed to the output end of the electric push rod 41. By extending the output end of the electric push rod 41, the push plate 42 is pushed to pull the mounting base 2 to slide on the slide rail 31, and the air outlet end of the air inlet head 25 is inserted into the air inlet position of the finned evaporator for monitoring.
[0026] Example 2:
[0027] like Figure 4 As shown, a limiting plate 5 is fixedly attached to the outer wall of the intake head 25. Both ends of the limiting plate 5 are slidably connected to C-shaped slides 51 fixed to the side wall of the testing housing 21. A limiting groove 52 is formed on the C-shaped slide 51, and a limiting block 53 that cooperates with the limiting plate 5 is inserted into the limiting groove 52. Different intake heads 25 have limiting plates 5 of fixed sizes. When replacing, the limiting plate 5 is slidably installed on the C-shaped slide 51, and the limiting block 53 is inserted into the limiting groove 52 for locking and limiting, improving installation stability. A fixing post 6 located outside the C-shaped slide 51 is fixedly attached to the side wall of the testing housing 21. A return spring 61 is fixedly attached to the fixing post 6, and the other end of the return spring 61 is fixedly connected to the limiting block 53. The elastic potential energy of the return spring 61 can push and press the limiting block 53 for limiting. After the return spring 61 is compressed, it is easy to release the limiting for replacement.
[0028] like Figure 2 As shown, an electric push rod 7 is fixedly connected to the upper part of the fixed base 1 and located below the test stand 12. The output end of the electric push rod 7 is fixedly connected to the lower part of the test stand 12. Both sides of the upper part of the test stand 12 are provided with U-shaped limiting frames 71 arranged in a mirror image. A threaded rod 72 is screwed to the upper part of the U-shaped limiting frame 71, and a clamping plate 73 is fixedly connected to the lower end of the threaded rod 72.
[0029] By clamping and fixing the finned evaporator to be tested, the height position of the test stand 12 is adjusted using the electric push rod 27 according to the different specifications of the finned evaporator, so as to adjust the air inlet position of the finned evaporator to correspond with the air inlet head 25.
[0030] The above is the entire usage process of a finned evaporator leak detection device.
[0031] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.
Claims
1. A leak detection device for a finned evaporator, comprising a fixed base (1), wherein a guide rod (11) is fixedly connected to the upper part of the fixed base (1), and a test stand (12) is movably inserted into the guide rod (11), characterized in that: It also includes a mounting base (2) located on the front side of the testing platform (12). A testing housing (21) with an internal cavity is fixedly connected to the upper part of the mounting base (2). A pressure sensor (22) is passed through the upper part of the testing housing (21). A display screen (23) is provided on the upper part of the pressure sensor (22). A testing probe located inside the testing housing (21) is provided at the lower end of the pressure sensor (22). An air pump (24) fixed to the upper part of the mounting base (2) is connected to one side of the testing housing (21). An air inlet head (25) connected to the finned evaporator is movably inserted at the other end of the testing housing (21). The air inlet head (25) is sealed at the connection point by a sealing ring.
2. The leak detection device for a finned evaporator according to claim 1, characterized in that: The fixed base (1) is fixedly connected to a support base (3) located below the mounting base (2), and the support base (3) is fixedly connected to a slide rail (31) that is slidably connected to the mounting base (2).
3. The leak detection device for a finned evaporator according to claim 2, characterized in that: A connecting plate (4) is fixed between the two sets of support bases (3). An electric push rod (41) passes through the connecting plate (4). A push plate (42) that is fixed to the lower part of the mounting base (2) is vertically fixed to the output end of the electric push rod (41).
4. A leak detection device for a finned evaporator according to claim 1, characterized in that: A limiting plate (5) is fixedly attached to the outer wall of the intake head (25). The two ends of the limiting plate (5) are slidably connected to C-shaped slides (51) fixed to the side wall of the detection box (21). A limiting groove (52) is opened on the C-shaped slide (51), and a limiting block (53) that cooperates with the limiting plate (5) is inserted into the limiting groove (52).
5. A leak detection device for a finned evaporator according to claim 4, characterized in that: A fixed post (6) located outside the C-shaped slide (51) is fixedly connected to the side wall of the detection housing (21). A return spring (61) is fixedly connected to the fixed post (6), and the other end of the return spring (61) is fixedly connected to the limiting block (53).
6. A leak detection device for a finned evaporator according to claim 1, characterized in that: The upper part of the fixed base (1) is fixedly connected to an electric push rod 2 (7) located below the test bench (12), and the output end of the electric push rod 2 (7) is fixedly connected to the lower part of the test bench (12). Both sides of the upper part of the test bench (12) are provided with U-shaped limiting frames (71) arranged in a mirror image. The upper part of the U-shaped limiting frame (71) is screwed with a threaded rod (72), and the lower end of the threaded rod (72) is fixedly connected to a clamping plate (73).