Heat dissipation structure of feeder branch grounding monitoring device
By designing the heat dissipation structure of ventilation tubes, exhaust fans, moisture-proof mechanisms and heat dissipation mechanisms on the feeder branch grounding monitoring terminal, the problem of moisture entering the terminal in high humidity environment is solved, ensuring the normal operation of the equipment and signal transmission quality.
Patent Information
- Application Number
- CN202421391843.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-18
- Publication Date
- 2025-04-04
- Estimated Expiration
- 2034-06-18
AI Technical Summary
The heat dissipation structure of the existing feeder branch grounding monitoring terminal can easily cause moisture to enter the terminal in a high humidity environment, affecting normal operation, and may cause water accumulation at the bottom of the box to affect the normal operation of the leakage current interface and the mains interface.
A heat dissipation structure of a feeder branch grounding monitoring device including a ventilation tube, an exhaust fan, a moisture-proof mechanism and a heat dissipation mechanism is designed. An air circulation passage is formed through a ventilation tube and a suction fan arranged on the housing, which takes away heat and isolates the external humid air. The moisture-proof mechanism is located at the bottom of the shell to prevent water vapor from condensing into water droplets and to ensure the normal operation of the exhaust fan.
It effectively avoids moisture entering the terminal in a high humidity environment, prevents water droplets from accumulating and affects the work of the equipment, and ensures the normal operation of the feeder branch grounding monitoring device and the signal transmission quality.
Smart Images

Figure CN222721836U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of inspection equipment, in particular to a heat dissipation structure of a feeder branch grounding monitoring device. Background Art
[0002] Feeder, also known as cable, plays the role of transmitting signals in many fields including cable TV systems. It transmits the signal received by the antenna to the front-end system, and the signal output by the front-end is also transmitted to the TV of each user by the cable. Therefore, the quality and model of the feeder are important factors that directly affect the reception effect and signal transmission quality of the cable TV system. During the laying process of the feeder, a feeder branch grounding monitoring terminal is usually set up to monitor the switches on the overhead distribution line poles and the cable line ring network cabinets. The feeder branch grounding monitoring terminal will generate a certain amount of heat during operation. In order to avoid heat accumulation in the feeder branch grounding monitoring terminal, a heat dissipation structure is generally set on the feeder branch grounding monitoring terminal.
[0003] For example, the patent (publication number: CN220105086U) discloses a real-time grounding monitoring device, in which a number of heat dissipation holes are opened on the lower side of the box to dissipate heat inside the monitoring box. However, when the heat dissipation structure dissipates heat for the feeder branch grounding monitoring terminal, moisture in the air may enter the feeder branch grounding monitoring terminal, especially during the return of the south wind in the south, when the humidity in the air is very high. Moisture entering the feeder branch grounding monitoring terminal will have an adverse effect on the normal operation of the feeder branch grounding monitoring terminal, and moisture will also condense into water droplets on the inside and outside of the box, and the water droplets will slide down to the bottom of the inside and outside of the box. The lower side of the box is provided with a leakage current detection interface and a mains power interface. If there is water accumulation at the bottom of the box, it may affect the normal operation of the leakage current detection interface and the mains power interface. Utility Model Content
[0004] In view of the problems existing in the prior art, the utility model provides a heat dissipation structure of a feeder branch grounding monitoring device to prevent moisture from entering the feeder branch grounding monitoring terminal when the air humidity is very high, and to prevent water from accumulating at the bottom of the feeder branch grounding monitoring terminal, which would have an adverse effect on the operation of the feeder branch grounding monitoring terminal.
[0005] In order to achieve the above utility model purpose, the technical solution of the utility model is as follows:
[0006] The heat dissipation structure of the feeder branch grounding monitoring device is used to dissipate heat from the feeder monitoring terminal body, and includes:
[0007] A feeder branch grounding monitoring device housing is arranged outside the feeder monitoring terminal body, and the feeder branch grounding monitoring device housing comprises:
[0008] A ventilator, one or more of which are respectively provided at the upper and lower parts of the front side, or the upper and lower parts of the rear side, of the housing of the feeder branch grounding monitoring device;
[0009] An exhaust fan, which is arranged in the upper or lower ventilator;
[0010] A moisture-proof mechanism, which is arranged on the housing of the feeder branch grounding monitoring device and is located at the bottom of the housing of the feeder branch grounding monitoring device;
[0011] A heat dissipation mechanism is arranged between the feeder branch grounding monitoring device housing and the feeder monitoring terminal body, the heat dissipation mechanism is connected to the upper ventilation duct and the lower ventilation duct, and the heat dissipation mechanism passes through the moisture-proof mechanism.
[0012] Furthermore, the moisture-proof mechanism is provided on both sides of the bottom of the feeder branch grounding monitoring device housing;
[0013] The heat dissipation mechanism comprises:
[0014] A first ventilation box, which is arranged on the top of the feeder branch grounding monitoring device housing and is connected to the upper ventilation cylinder, and the first ventilation box is located above the feeder monitoring terminal body;
[0015] A second ventilation box, which is arranged at the bottom of the feeder branch grounding monitoring device housing and is connected to the ventilation cylinder at the bottom, and the second ventilation box is located below the feeder monitoring terminal body;
[0016] A ventilation pipe, which is connected and arranged between the second ventilation box and the moisture-proof mechanism, and the ventilation pipe is located below the feeder monitoring terminal body;
[0017] The ventilation and heat dissipation pipe is connected between the first ventilation box and the moisture-proof mechanism, and the ventilation and heat dissipation pipe is arranged on both sides of the left and right sides of the feeder monitoring terminal body.
[0018] Furthermore, the moisture-proof mechanism comprises:
[0019] A moisture-proof box is provided on each of the left and right sides of the bottom of the feeder branch grounding monitoring device housing, and the ventilation pipe and the ventilation and heat dissipation pipe are respectively connected to the moisture-proof box;
[0020] A baffle, which is detachably arranged on the front side or the rear side of the moisture-proof box;
[0021] A moisture-proof agent is arranged inside the moisture-proof box.
[0022] Furthermore, the moisture-proof mechanism further comprises:
[0023] A rotating rod, one end of which passes through the moisture-proof box and is rotatably connected to the side wall opposite to the baffle, and the other end of which is located inside the moisture-proof box;
[0024] A rotating block, which is arranged outside the moisture-proof box and fixedly connected to one end of the rotating rod;
[0025] A push plate is slidably connected and arranged inside the moisture-proof box, and the push plate is threadedly connected to the rotating rod.
[0026] Furthermore, the moisture-proofing agent is a silica gel moisture-proofing agent.
[0027] Furthermore, a blocking net is provided at the connection between the moisture-proof box and the ventilation pipe, and at the connection between the moisture-proof box and the ventilation and heat dissipation pipe.
[0028] Furthermore, the feeder branch grounding monitoring device housing further includes:
[0029] A dustproof net is arranged in the ventilating tube and is located outside the exhaust fan.
[0030] Furthermore, the ventilation and heat dissipation pipe is arranged in close contact with the feeder monitoring terminal body.
[0031] The utility model at least has the following beneficial effects:
[0032] 1. The heat dissipation structure of the feeder branch grounding monitoring device provided by the utility model comprises a feeder branch grounding monitoring device shell arranged outside the feeder monitoring terminal body, a heat dissipation mechanism arranged between the feeder branch grounding monitoring device shell and the feeder monitoring terminal body, a ventilator and an exhaust fan arranged on the feeder branch grounding monitoring device shell, the ventilator being connected to the heat dissipation mechanism, while dissipating heat for the feeder monitoring terminal body, since the outside air is not in direct contact with the feeder monitoring terminal body, the feeder monitoring terminal body will not be affected by the humidity in the air, thereby preventing the humid air from affecting the feeder branch grounding monitoring device.
[0033] 2. The moisture-proof mechanism is arranged on the shell of the feeder branch grounding monitoring device and is located at the bottom of the shell of the feeder branch grounding monitoring device. The heat dissipation mechanism passes through the moisture-proof mechanism, which can prevent the residual water vapor in the air from sliding down along the heat dissipation mechanism during the heat dissipation process and gathering in a large amount in the lower ventilation duct to wet the exhaust fan and affect the operation of the exhaust fan, or flowing out from the lower ventilation duct. When a large amount of water droplets gather, it will have an adverse effect on the work of the feeder branch grounding monitoring device and affect the detection of the feeder branch.
[0034] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS
[0035] Figure 1The present invention is a three-dimensional schematic diagram of the heat dissipation structure of a feeder branch grounding monitoring device in a technical solution of the present invention.
[0036] Figure 2 The present invention is a schematic diagram of the internal structure of the heat dissipation structure of a feeder branch grounding monitoring device in a technical solution of the present invention.
[0037] Figure 3 The schematic diagram is a top view of the internal structure of the heat dissipation structure of a feeder branch grounding monitoring device in one technical solution of the utility model.
[0038] In the figure, 1. feeder branch grounding monitoring device housing; 101. ventilator; 102. exhaust fan; 103. dust screen; 2. cabinet door; 3. moisture-proof mechanism; 301. moisture-proof box; 302. baffle; 303. moisture-proof agent; 311. rotating rod; 312. rotating block; 313. push plate; 4. heat dissipation mechanism; 401. first ventilation box; 402. second ventilation box; 403. ventilation pipe; 404. ventilation heat dissipation pipe; 5. main body of online low-voltage DC system feeder monitoring terminal; 6. baffle. DETAILED DESCRIPTION
[0039] The present invention is further described in detail below in conjunction with embodiments so that those skilled in the art can implement the invention with reference to the description.
[0040] It should be noted that the experimental methods described in the following embodiments are conventional methods unless otherwise specified, and the reagents and materials can be obtained from commercial sources unless otherwise specified; in the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "set" should be understood in a broad sense, for example, they can be fixedly connected, set, or detachably connected, set, or connected and set in one piece. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood in specific circumstances. The orientation or position relationship indicated by the terms "transverse", "longitudinal", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "counterclockwise", etc. is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present utility model.
[0041] Example
[0042] like Figure 1 , Figure 2 and Figure 3As shown, the utility model provides a heat dissipation structure of a feeder branch grounding monitoring device, which is used to dissipate heat for a feeder monitoring terminal body 5, including:
[0043] The feeder branch grounding monitoring device housing 1 is arranged outside the feeder monitoring terminal body 5, and the feeder branch detection part is introduced from the bottom of the feeder branch grounding monitoring device housing 1 (not drawn in the figure). The feeder branch grounding monitoring device housing 1 includes:
[0044] A ventilating duct 101, which is provided with one or more ventilating ducts 101 at the upper and lower parts of the front side, or the upper and lower parts of the rear side, of the housing 1 of the feeder branch grounding monitoring device. In the technical solution, two ventilating ducts 101 are provided at the upper and lower parts of the front side of the housing 1 of the feeder branch grounding monitoring device, respectively;
[0045] An exhaust fan 102 is disposed in the upper or lower ventilation tube 101. In the present technical solution, the exhaust fan 102 is disposed in the lower ventilation tube 101;
[0046] A moisture-proof mechanism 3, which is arranged on the feeder branch grounding monitoring device housing 1 and is located at the bottom of the feeder branch grounding monitoring device housing 1;
[0047] A heat dissipation mechanism 4 is arranged between the feeder branch grounding monitoring device shell 1 and the feeder monitoring terminal body 5. The heat dissipation mechanism 4 connects the upper ventilation duct 101 and the lower ventilation duct 101, and passes through the moisture-proof mechanism 3. An air circulation passage is formed between the feeder branch grounding monitoring device shell 1 and the feeder monitoring terminal body 5 in the feeder branch grounding monitoring device shell 1, allowing outside air to enter the feeder branch grounding monitoring device shell 1 to take away the heat generated by the feeder monitoring terminal body 5 when working, while isolating the air from the feeder monitoring terminal body 5, and the moisture in the air entering the feeder branch grounding monitoring device shell 1 from the outside does not affect the operation of the feeder monitoring terminal body 5.
[0048] The cabinet door 2 is rotatably connected to the front side wall of the feeder branch grounding monitoring device housing 1, and the cabinet door 2 faces the feeder monitoring terminal body 5. When the feeder monitoring terminal body 5 needs to be operated, the cabinet door 2 is opened. The working principle of this device is as follows:
[0049] The exhaust fan 102 extracts air, and the flowing air passes through the lower ventilation tube 101, enters the heat dissipation mechanism 4, and is discharged outward again through the upper ventilation tube 101. When the feeder monitoring terminal body 5 generates heat during operation, the heat can be transferred to the heat dissipation mechanism 4. When the flowing air passes through the heat dissipation mechanism 4, it exchanges heat with the heat dissipation mechanism 4, takes away the heat on the heat dissipation mechanism 4, and dissipates the heat of the feeder monitoring terminal body 5. During the heat dissipation, since the outside air is not in direct contact with the feeder monitoring terminal body 5, the feeder monitoring terminal body 5 will not be affected by the humidity in the air. Usually, when the south returns to the south, the air humidity is very high. During the heat dissipation process, the air The water vapor remaining in the air will condense into water droplets inside the heat dissipation mechanism 4, and the water droplets will slide down along the heat dissipation mechanism 4. After the device has been running for a period of time, the water droplets will gather in large quantities in the lower ventilation duct 101, wetting the exhaust fan 102 and affecting the operation of the exhaust fan 102, or flow out from the lower ventilation duct 101. Water will gather in large quantities at the bottom of the feeder branch grounding monitoring device shell 1, which will affect the feeder branch detection part introduced at the bottom of the feeder branch grounding monitoring device shell 1. The design of the present application can make the water droplets slide down along the heat dissipation mechanism 4. When flowing through the moisture-proof mechanism 3, the moisture-proof mechanism 3 collects the sliding water droplets to prevent the water droplets from accumulating in the lower ventilation duct 101.
[0050] In summary, the heat dissipation structure of the feeder branch grounding monitoring device provided by the utility model is that a feeder branch grounding monitoring device shell 1 is arranged outside the feeder monitoring terminal body 5, a heat dissipation mechanism 4 is arranged between the feeder branch grounding monitoring device shell 1 and the feeder monitoring terminal body 5, a ventilator 101 and an exhaust fan 102 are arranged on the feeder branch grounding monitoring device shell 1, and the ventilator 101 is connected to the heat dissipation mechanism 4. While dissipating the heat of the feeder monitoring terminal body 5, since the outside air is not in direct contact with the feeder monitoring terminal body 5, the feeder monitoring terminal body 5 is not It will be affected by the humidity in the air, preventing humid air from affecting the feeder branch grounding monitoring device; the moisture-proof mechanism 3 is arranged on the feeder branch grounding monitoring device shell 1, and is located at the bottom of the feeder branch grounding monitoring device shell 1, and the heat dissipation mechanism 4 passes through the moisture-proof mechanism 3, which can prevent the residual water vapor in the air from accumulating in large quantities in the lower ventilation duct 101 through the heat dissipation mechanism 4 during the heat dissipation process, wetting the exhaust fan 102, affecting the operation of the exhaust fan 102, or flowing out from the lower ventilation duct 101. When water accumulates in large quantities, it affects the detection of the feeder branch by the feeder branch grounding monitoring device.
[0051] In another technical solution, the moisture-proof mechanism 3 is provided on each of the left and right sides of the bottom of the feeder branch grounding monitoring device housing 1; the heat dissipation mechanism 4 includes:
[0052] A first ventilation box 401, which is arranged on the top of the feeder branch grounding monitoring device housing 1 and is connected to the upper ventilation duct 101, and the first ventilation box 401 is located above the feeder monitoring terminal body 5;
[0053] A second ventilation box 402, which is arranged at the bottom of the feeder branch grounding monitoring device housing 1 and is connected to the ventilation cylinder 101 at the bottom. The second ventilation box 402 is located below the feeder monitoring terminal body 5;
[0054] A ventilation pipe 403 is connected between the second ventilation box 402 and the moisture-proof mechanism 3. The ventilation pipe 403 is located below the feeder monitoring terminal body 5. There is a moisture-proof mechanism 3 on both sides of the second ventilation box 402. For better heat dissipation, multiple ventilation pipes 403 can be evenly spaced on both sides of the second ventilation box 402 to communicate with the moisture-proof mechanism 3 on the same side;
[0055] The ventilation and heat dissipation pipe 404 is connected between the first ventilation box 401 and the moisture-proof mechanism 3. The ventilation and heat dissipation pipe 404 is arranged on both sides of the left and right sides of the feeder monitoring terminal body 5. The lower end of the ventilation and heat dissipation pipe 404 is connected to the moisture-proof mechanism 3, and the upper end is connected to the first ventilation box 401. For better heat dissipation, multiple ventilation and heat dissipation pipes 404 can be arranged at equal intervals on the left and right sides of the feeder monitoring terminal body 5. The ventilation and heat dissipation pipe 404 can be made of materials with good thermal conductivity, such as aluminum and copper.
[0056] In this way, heat dissipation mechanisms are arranged on the upper and lower sides and both sides of the feeder monitoring terminal body 5, which can better dissipate heat for the feeder monitoring terminal body 5.
[0057] In another technical solution, the moisture-proof mechanism 3 includes:
[0058] A moisture-proof box 301 is provided on each of the left and right sides of the bottom of the feeder branch grounding monitoring device housing 1, and the ventilation pipe 403 and the ventilation and heat dissipation pipe 404 are respectively connected to the moisture-proof box 301;
[0059] A baffle 302, which is detachably arranged on the front side or the rear side of the moisture-proof box 301;
[0060] The moisture-proof agent 303 is arranged inside the moisture-proof box 301 .
[0061] When the flowing air passes through the moisture-proof box 301 , the moisture-proof agent 303 can absorb the water vapor in the air.
[0062] In another technical solution, the moisture-proof mechanism (3) further comprises:
[0063] A rotating rod 311, one end of which passes through the moisture-proof box 301 and is rotatably connected to the side wall opposite to the baffle 302, and the other end of which is located inside the moisture-proof box 301;
[0064] A rotating block 312, which is disposed outside the moisture-proof box 301 and fixedly connected to one end of the rotating rod 311;
[0065] The push plate 313 is slidably connected and disposed inside the moisture-proof box 301 . The push plate 313 is threadedly connected to the rotating rod 311 .
[0066] When the moisture-proofing agent 303 is to be removed, the baffle 302 is removed from the moisture-proof box 301 , and the rotating block 312 is rotated to drive the rotating rod 311 to rotate, thereby driving the pushing plate 313 to move, and the pushing plate 313 pushes the moisture-proofing agent 303 out of the moisture-proof box 301 .
[0067] In another technical solution, the desiccant 303 is a silicone desiccant, which absorbs moisture but does not release heat.
[0068] In another technical solution, a blocking net 6 is provided at the connection between the moisture-proof box 301 and the ventilation pipe 403 , and at the connection between the moisture-proof box 301 and the ventilation and heat dissipation pipe 404 to prevent the moisture-proof agent 303 from entering the ventilation pipe 403 and the ventilation and heat dissipation pipe 404 .
[0069] In another technical solution, the feeder branch grounding monitoring device housing 1 further includes:
[0070] The dustproof net 103 is arranged in the ventilating tube 101 and is located outside the exhaust fan 102 .
[0071] In another technical solution, the ventilation and heat dissipation pipe 404 is arranged in close contact with the feeder monitoring terminal body 5, and the side walls of the ventilation and heat dissipation pipe 404 are in close contact with the side walls on both sides of the feeder monitoring terminal body 5 to improve the heat dissipation efficiency.
[0072] Although the implementation scheme of the utility model has been disclosed as above, it is not limited to the applications listed in the specification and implementation modes. It can be fully applied to various fields suitable for the utility model. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the utility model is not limited to the specific details and the illustrations shown and described herein.
Claims
1. A heat dissipation structure of a feeder branch grounding monitoring device, used for dissipating heat from a feeder monitoring terminal body (5), characterized in that: include: A feeder branch grounding monitoring device housing (1) is arranged outside the feeder monitoring terminal body (5), and the feeder branch grounding monitoring device housing (1) comprises: A ventilating duct (101), one or more of which are respectively arranged at the upper and lower parts of the front side, or the upper and lower parts of the rear side, of the feeder branch grounding monitoring device housing (1); An exhaust fan (102) is arranged in the upper or lower ventilation cylinder (101); A moisture-proof mechanism (3), which is arranged on the feeder branch grounding monitoring device housing (1) and is located at the bottom of the feeder branch grounding monitoring device housing (1); A heat dissipation mechanism (4) is arranged between the feeder branch grounding monitoring device housing (1) and the feeder monitoring terminal body (5); the heat dissipation mechanism (4) is connected to the upper ventilation duct (101) and the lower ventilation duct (101); and the heat dissipation mechanism (4) passes through the moisture-proof mechanism (3).
2. The heat dissipation structure of the feeder branch grounding monitoring device according to claim 1, characterized in that: The moisture-proof mechanism (3) is provided on both left and right sides of the bottom of the feeder branch grounding monitoring device housing (1); The heat dissipation mechanism (4) comprises: A first ventilation box (401), which is arranged on the top of the feeder branch grounding monitoring device housing (1) and is connected to the upper ventilation cylinder (101), and the first ventilation box (401) is located above the feeder monitoring terminal body (5); A second ventilation box (402) is arranged at the bottom of the feeder branch grounding monitoring device housing (1) and is connected to the ventilation cylinder (101) at the bottom. The second ventilation box (402) is located below the feeder monitoring terminal body (5); A ventilation pipe (403) is arranged to communicate between the second ventilation box (402) and the moisture-proof mechanism (3), and the ventilation pipe (403) is located below the feeder monitoring terminal body (5); A ventilation and heat dissipation pipe (404) is arranged to communicate between the first ventilation box (401) and the moisture-proof mechanism (3), and ventilation and heat dissipation pipes (404) are arranged on both left and right sides of the feeder monitoring terminal body (5).
3. The heat dissipation structure of the feeder branch grounding monitoring device according to claim 2, characterized in that: The moisture-proof mechanism (3) comprises: A moisture-proof box (301) is provided on each of the left and right sides of the bottom of the feeder branch grounding monitoring device housing (1); the ventilation pipe (403) and the ventilation and heat dissipation pipe (404) are respectively connected to the moisture-proof box (301); A baffle (302) detachably disposed on the front side or the rear side of the moisture-proof box (301); A moisture-proof agent (303) is arranged inside the moisture-proof box (301).
4. The heat dissipation structure of the feeder branch grounding monitoring device according to claim 3, characterized in that: The moisture-proof mechanism (3) further comprises: A rotating rod (311), one end of which passes through the moisture-proof box (301) and is rotatably connected to the side wall opposite to the baffle (302), and the other end of which is located inside the moisture-proof box (301); A rotating block (312), which is arranged outside the moisture-proof box (301) and is fixedly connected to one end of the rotating rod (311); A push plate (313) is slidably connected and arranged inside the moisture-proof box (301), and the push plate (313) is threadedly connected to the rotating rod (311).
5. The heat dissipation structure of the feeder branch grounding monitoring device according to claim 3, characterized in that: The moisture-proofing agent (303) is a silica gel moisture-proofing agent.
6. The heat dissipation structure of the feeder branch grounding monitoring device according to claim 3, characterized in that: A blocking net (6) is provided at the connection between the moisture-proof box (301) and the ventilation pipe (403), and at the connection between the moisture-proof box (301) and the ventilation and heat dissipation pipe (404).
7. The heat dissipation structure of the feeder branch grounding monitoring device according to claim 1, characterized in that: The feeder branch grounding monitoring device housing (1) further comprises: A dustproof net (103) is arranged in the ventilation tube (101) and is located outside the exhaust fan (102).
8. The heat dissipation structure of the feeder branch grounding monitoring device according to claim 2, characterized in that: The ventilation and heat dissipation pipe (404) is arranged in close contact with the feeder monitoring terminal body (5).
Citation Information
Patent Citations
Grounding real-time monitoring device
CN220105086U