Multifunctional heat dissipation device of photovoltaic intelligent combiner box
Through the multi-functional heat dissipation device of photovoltaic intelligent convergence box with waterless air-cooling design and automated control, the problems of excessive temperature inside the photovoltaic convergence box and leakage and dust accumulation are solved, achieving safe and effective heat dissipation and dust prevention effects , extends the service life of the equipment.
Patent Information
- Application Number
- CN202420928820.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-30
- Publication Date
- 2024-12-20
- Estimated Expiration
- 2034-04-30
AI Technical Summary
The existing photovoltaic confluence box lacks a dedicated heat dissipation mechanism, which leads to excessive internal temperature, affecting the reliability and life of the equipment, and the water-cooled structure has a risk of leakage, and the air inlet is not dust-proof, affecting the normal operation of electronic components.
It adopts a waterless air-cooled design, combined with automated control and air inlet baffle design, and uses dense toothed radiator and cooling fan. The external baffle structure is an electric louver or sliding structure, equipped with a temperature sensor to achieve automated heat dissipation and dustproof.
It achieves safe and effective heat dissipation, avoids the risk of water leakage and dust accumulation of water-cooled structures, and extends the service life of the equipment.
Smart Images
Figure CN222215685U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of photovoltaic combiner boxes, and in particular relates to a multifunctional heat dissipation device for a photovoltaic intelligent combiner box. Background Art
[0002] For large-scale photovoltaic grid-connected power generation systems, in order to reduce the connection lines between photovoltaic modules and inverters, facilitate maintenance and improve reliability, it is generally necessary to add a DC junction device, also known as a junction box, between the photovoltaic modules and the inverter.
[0003] The internal ambient temperature of the combiner box should be between -25℃ and +55℃, because the combiner box has no dedicated heat dissipation mechanism, or is simply open-hole air heat dissipation. With long-term use or the influence of external ambient temperature, its internal temperature will accumulate to about 80℃. When the temperature is too high, it will accelerate the aging of its internal circuits or cause short circuits or even damage the solar panels.
[0004] The Chinese utility model patent, patent number CN201821711493.X, discloses an efficient heat dissipation structure for a smart junction box for a photovoltaic microgrid, which uses cooling pipes and fan exhaust mode for cooling. However, this heat dissipation mode has two problems. First, the water cooling structure has the risk of leakage. Once leakage occurs, it will cause a short circuit inside the junction box or even damage the components; second, the air inlet has no additional dust protection considerations. With long-term use, dust will accumulate, which will also affect the normal operation of its internal electronic components.
[0005] Therefore, in the field of photovoltaic power generation combiner boxes, there is an urgent need for a safe and intelligent multifunctional heat dissipation device for combiner boxes. Utility Model Content
[0006] In view of the problems existing in the prior art, the utility model provides a multifunctional heat dissipation device for a photovoltaic intelligent junction box, which adopts a waterless air cooling design, automatic control and an air inlet baffle design to achieve safe heat dissipation and has a dust-proof effect.
[0007] A photovoltaic intelligent combiner box multifunctional heat dissipation device, comprising a box body and a heat dissipation device; the box body is provided with a hinged front cover plate and its back plate is a hollow structure; the front cover plate is provided with an air inlet, a baffle is hinged inside the front cover plate at the air inlet, and a tension spring is connected between the baffle plate and the front cover plate;
[0008] The heat dissipation device is sleeved in the hollow structure of the back plate of the box; the heat dissipation device includes a dense-tooth heat sink; the size of the dense-tooth heat sink is equal to the hollow structure of the back plate of the box, and is bolted to the side plate of the box through a connecting plate; the dense-tooth heat sink is provided with a cooling fan on one side of the box body, and an external baffle structure is provided on the other side of the box body; the external baffle structure is an openable and closable structure.
[0009] As a preferred embodiment of the present invention, a dust-proof gauze is provided at the air inlet.
[0010] As a preferred embodiment of the present invention, the external baffle structure is an electric shutter structure.
[0011] As a preferred embodiment of the utility model, the external baffle structure includes slide rails, sliding baffles and a screw structure; wherein the slide rails are arranged in parallel on both sides of the back plate of the box body, the sliding baffles are placed on the slide rails, and are driven by the screw structure to slide up and down; the screw structure is driven by a small motor.
[0012] As a preferred embodiment of the present invention, a temperature sensor is provided in the box.
[0013] The working principle is as follows: when the temperature inside the box is too high, the external baffle structure opens, the cooling fan starts working, and the heat concentrated in the dense-tooth heat sink is blown out of the box; the baffle at the air inlet opens inward under the action of suction to achieve air circulation. When the temperature inside the box drops, the cooling fan stops working, the external baffle structure closes, and the baffle is attached to the front cover under the action of the tension spring, completing a heat dissipation.
[0014] The utility model collects heat by arranging dense-tooth heat sinks inside the box body, replaces the original water cooling structure, avoids losses caused by water leakage, and realizes safe heat dissipation;
[0015] The external baffle structure and the structural design of the air inlet not only meet the air circulation requirements during heat dissipation, but also meet the waterproof and dustproof requirements during non-heat dissipation work. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;
[0017] Figure 2 It is a schematic diagram of the front cover of the utility model;
[0018] Figure 3 This is a schematic diagram of the structure of the heat dissipation device of the utility model;
[0019] Figure 4 This is a schematic diagram of the structure of the external baffle in Example 1 of the utility model;
[0020] Figure 5 It is a schematic diagram of the external baffle structure in Example 2 of the utility model.
[0021] In the figure: 1. box body; 2. heat dissipation device; 21. dense-tooth heat sink; 22. cooling fan; 23. external baffle structure; 3. front cover; 31. air inlet; 32. baffle; 33. tension spring; 41. slide rail; 42. sliding baffle; 43. screw structure. DETAILED DESCRIPTION
[0022] In order to further understand the content, features and effects of the present invention, the following embodiments are given as examples and described in detail with reference to the accompanying drawings.
[0023] The structure of the utility model is described in detail below in conjunction with the accompanying drawings. Example 1
[0024] See also Figure 1 The utility model provides a photovoltaic intelligent combiner box multifunctional heat dissipation device, including a box body 1 and a heat dissipation device 2; the box body 1 is provided with a hinged front cover plate 3 and its back plate is provided with a rectangular hollow structure; see Figure 2 The front cover plate is provided with an air inlet 31, a baffle plate 32 is hinged inside the front cover plate 3 at the air inlet 31, and a tension spring 33 is connected between the baffle plate 32 and the front cover plate 3;
[0025] See also Figure 3 The heat dissipation device 2 is sleeved in the hollow structure of the back plate of the box body 1; the heat dissipation device 2 includes a dense-toothed heat sink 21; the size of the dense-toothed heat sink 21 is equal to the hollow structure of the back plate of the box body 1, and is bolted to the side plate of the box body 1 through a connecting plate; the dense-toothed heat sink 21 is provided with a cooling fan 22 on one side inside the box body 1, and an external baffle structure 23 is provided on one side outside the box body 1; the external baffle structure 23 is an openable and closable structure.
[0026] In this embodiment, a dust-proof gauze is provided at the air inlet 31 for preventing dust.
[0027] See also Figure 4 In this embodiment, the external baffle structure 23 is an electric shutter structure, and the shutter can be opened and closed under the action of the motor assembly.
[0028] In this embodiment, a temperature sensor is further provided in the box body 1, and the temperature sensor is used to monitor the temperature in the box. When the temperature is too high, the start and stop of the electric components of the external baffle structure 23 and the cooling fan 22 can be controlled by electrical signals. Example 2
[0029] See also Figure 5 Compared with Example 1, the external baffle structure 23 of this embodiment includes a slide rail 41, a sliding baffle 42 and a screw structure 43; wherein the slide rail 41 is arranged in parallel on both sides of the back plate of the box body 1, the sliding baffle 42 is placed on the slide rail 41, and is driven by the screw structure 43 to slide up and down; the screw structure 43 is driven by a small motor.
[0030] Through the structural design of the utility model, the waterless air cooling design is adopted, the automatic control and the inlet 31 baffle 32 are cleverly designed, so that the automatic heat dissipation of the junction box is realized, the temperature inside the box is guaranteed, the aging effect caused by high temperature is avoided, and the practical life is extended.
Claims
1. A multifunctional heat dissipation device for a photovoltaic intelligent combiner box, comprising a box body (1) and a heat dissipation device (2), Features: The box body (1) is provided with a hinged front cover plate (3) and a back plate of a hollow structure; the front cover plate is provided with an air inlet (31), a baffle plate (32) is hinged inside the front cover plate (3) at the air inlet (31), and a tension spring (33) is connected between the baffle plate (32) and the front cover plate (3); The heat dissipation device (2) is sleeved in the hollow structure of the back plate of the box body (1); the heat dissipation device (2) comprises a dense-toothed heat sink (21); the dense-toothed heat sink (21) has a size equal to the hollow structure of the back plate of the box body (1), and is bolted to the side plate of the box body (1) via a connecting plate; the dense-toothed heat sink (21) is provided with a heat dissipation fan (22) on one side inside the box body (1), and is provided with an external baffle structure (23) on one side outside the box body (1); the external baffle structure (23) is an openable and closable structure.
2. According to claim 1, a photovoltaic intelligent combiner box multifunctional heat dissipation device, Features: The external baffle structure (23) is an electric shutter structure.
3. According to claim 1, a photovoltaic intelligent combiner box multifunctional heat dissipation device, Features: The external baffle structure (23) comprises a slide rail (41), a sliding baffle (42) and a lead screw structure (43); wherein the slide rail (41) is arranged in parallel on both sides of the back plate of the box body (1); the sliding baffle (42) is placed on the slide rail (41) and is driven by the lead screw structure (43) to slide up and down; and the lead screw structure (43) is driven by a small motor.
4. According to claim 1, a photovoltaic intelligent combiner box multifunctional heat dissipation device, Features: A temperature sensor is provided in the box (1).