Heat dissipation structure of electrical power distribution cabinet

Abstract

The utility model relates to a heat dissipation structure of an electrical power distribution cabinet, which belongs to the technical field of heat dissipation of electrical cabinets and comprises an outer cabinet body, an outer cover, an inner frame, an inner cover, a power supply and a transformer. The outer cover is provided with screw holes which are in one-to-one correspondence with the tops of the outer cabinet body; the inner cover is provided with screw holes in one-to-one correspondence with the top of the inner frame; the inner frame is arranged in the outer cabinet body, and an air outlet cavity and an air inlet cavity are formed between the front and rear outer walls of the inner frame and the front and rear inner walls of the outer cabinet body respectively; an air outlet hole and an air inlet hole are respectively formed in the front wall and the rear wall of the inner frame, and the air outlet hole and the air inlet hole are correspondingly arranged; an induced draft fan I is arranged on the inner side of the front wall of the inner frame and at the air outlet hole; an air outlet pipe is arranged on the front side of the top of the outer cover; an air inlet pipe is arranged on the rear side of the top; and the bottoms of the air outlet pipe and the air inlet pipe are correspondingly communicated with the air outlet cavity and the air inlet cavity respectively. The buried electrical cabinet has the beneficial effects that the heat dissipation capability of the buried electrical cabinet can be effectively improved, the normal operation of an electrical system is facilitated, and the service life of equipment is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of heat dissipation of electrical cabinets, in particular to a heat dissipation structure of an electrical distribution cabinet. Background Art

[0002] Electrical distribution cabinets are made of steel and are used to protect the normal operation of components. They are widely used in the chemical industry, environmental protection industry, power system, metallurgical system, industry, nuclear power industry, fire safety monitoring, transportation industry, etc.

[0003] An underground electrical cabinet has its housing buried underground, and a high-strength stainless steel cover is typically used on the top surface. After installation, the cover is flush with the ground. Therefore, compared to ordinary distribution boxes, underground electrical cabinets do not occupy roads or space, and do not affect pedestrian and vehicle traffic. They are suitable for use in places such as squares, roads, exhibition halls, parks, factories, and airports. The electrical equipment inside an underground electrical cabinet generates heat during operation. Underground electrical cabinets are well sealed and lack internal heat dissipation devices, which often leads to excessively high temperatures inside the cabinet. Excessively high temperatures can damage the equipment inside the cabinet, shortening its service life and affecting the operation of the electrical system. Therefore, a heat dissipation structure for electrical distribution cabinets is proposed, which can effectively improve the heat dissipation efficiency of underground electrical cabinets. Utility Model Content

[0004] The purpose of the present invention is to overcome the problems existing in the prior art and provide a heat dissipation structure for an electrical distribution cabinet, which can effectively improve the heat dissipation capacity of the underground electrical cabinet, facilitate the normal operation of the electrical system, and increase the service life of the equipment.

[0005] The purpose of this utility model is achieved through the following technical solutions:

[0006] The heat dissipation structure of the electrical distribution cabinet includes an outer cabinet, an outer cover, an inner frame, an inner cover, a power supply, and a transformer. The power supply and transformer are installed inside the inner frame. The outer cover is provided with screw holes corresponding to the top of the outer cabinet for sealing the outer cabinet. The inner cover is provided with screw holes corresponding to the top of the inner frame for sealing the inner frame. The inner frame is arranged inside the outer cabinet, and an air outlet cavity and an air inlet cavity are formed between the front and rear outer walls of the inner frame and the front and rear inner walls of the outer cabinet, respectively.

[0007] The front and rear walls of the inner frame are respectively provided with air outlet holes and air inlet holes, and the air outlet holes and air inlet holes are arranged correspondingly; an induced draft fan is provided at the air outlet hole on the inner side of the front wall of the inner frame; an air outlet duct is provided on the front side of the top of the outer cover, and an air inlet duct is provided on the rear side of the top; the bottoms of the air outlet duct and the air inlet duct are respectively located above the air outlet cavity and the air inlet cavity, and are correspondingly connected to the air outlet cavity and the air inlet cavity.

[0008] In a preferred embodiment of this solution, the air inlet holes include a plurality of strip-shaped air inlet holes provided on the rear wall of the inner frame, and the air outlet holes include a plurality of circular air outlet holes provided on the front wall of the inner frame. The design advantage of the strip-shaped air inlet holes is that the strip-shaped holes can make the air entering the inner frame more uniform.

[0009] In a preferred embodiment of the present scheme, a mounting plate is respectively provided on the front and rear sides of the top of the power supply, and on the front and rear sides of the top of the transformer; the power supply and the transformer can be respectively hung on the left and right sides of the inner frame via the mounting plates; a rubber pad is provided at the bottom of the inner cover, and when the inner cover is closed with the top of the inner frame, the rubber pad can press tightly against the mounting plate.

[0010] In a preferred embodiment of this solution, a filter is provided in the air inlet duct, and a second induced draft fan is provided in the air outlet duct. The second induced draft fan can guide the air outlet cavity upward out of the outer cabinet.

[0011] In a preferred embodiment of the present scheme, a concave cavity is provided on the front wall of the outer cabinet, and the concave cavity faces the front side of the outer cabinet; inside the concave cavity, a transverse heat dissipation strip is provided on the front side of the bottom wall of the concave cavity; a removable mesh plate is provided on the front side of the concave cavity to protect the transverse heat dissipation strip.

[0012] In a preferred embodiment of this solution, the transverse heat dissipation strip and the cavity wall are an integral structure.

[0013] In a preferred embodiment of this solution, a heat conducting plate is provided on the rear side of the bottom wall of the cavity. The heat conducting plate is fixed to the rear side of the bottom wall of the cavity by screws or bolts. A vertical heat dissipation strip is integrally provided on the rear side of the heat conducting plate. The vertical heat dissipation strip is designed to be detachable, allowing for easy removal and dust cleaning after a certain period of use.

[0014] In a preferred embodiment of this solution, an outer waterproof ring is provided between the outer cabinet and the outer cover to ensure the sealing performance inside the outer cabinet.

[0015] In a preferred embodiment of this solution, an inner protective frame extends upward from the inner edge of the outer cabinet top. An upper cavity is formed on the top of the outer cover, corresponding to the inner protective frame. An inner waterproof ring is also provided on the top of the inner protective frame. When the outer cover is closed over the outer cabinet top, the inner wall of the upper cavity presses against the inner waterproof ring. The design of the inner waterproof ring and inner protective frame further enhances the sealing performance of the equipment.

[0016] In a preferred embodiment of the present solution, an outer edge is provided on the top of the inner protective frame. After installation, the top of the inner waterproof ring protrudes upward from the outer edge.

[0017] Compared with the heat dissipation structure of the traditional buried electrical cabinet, the beneficial effects of this utility model are:

[0018] (1) In this solution, the inner frame is arranged inside the outer cabinet, and an air outlet cavity and an air inlet cavity are formed between the front and rear outer walls of the inner frame and the front and rear inner walls of the outer cabinet respectively. The front and rear walls of the inner frame are respectively provided with an air outlet hole and an air inlet hole; an air outlet duct and an air inlet duct are provided in front of the top of the outer cover; the bottom ends of the air outlet duct and the air inlet duct are respectively connected with the air outlet cavity and the air inlet cavity respectively, and at the same time, an induced draft fan 1 is provided at the air outlet hole, and an induced draft fan 2 is provided at the air outlet duct. The external air of the equipment enters the air inlet cavity from the air inlet duct, and the induced draft fan 1 can introduce the air in the air inlet cavity into the inner frame, and then introduce it into the air outlet cavity from the air inlet hole, and then be guided out of the outer cabinet by the induced draft fan 2, so that the heat inside the device is brought out by the gas, thereby achieving efficient heat dissipation;

[0019] (2) This solution provides a concave cavity on the front wall of the outer cabinet, and a transverse heat dissipation strip is provided on the front side of the bottom wall of the concave cavity. The transverse heat dissipation strip can further accelerate the heat dissipation of the outer cabinet. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the utility model;

[0021] Figure 2 This is a schematic diagram of the structure in which the inner frame of the utility model is installed inside the outer cabinet;

[0022] Figure 3 It is a schematic diagram of the inner frame structure of the utility model. DETAILED DESCRIPTION

[0023] The technical solution of the present invention is further described in detail below with reference to the accompanying drawings, but the protection scope of the present invention is not limited to the following.

[0024] To make the objectives, technical solutions, and advantages of the embodiments of the present disclosure more clear, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present disclosure, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present disclosure without making any creative efforts shall fall within the scope of protection of the present disclosure.

[0025] It should be noted that the terms "first", "second" etc. in this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the application described herein. In this application, the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inside", "outside", "center", "vertical", "horizontal", "lateral", "longitudinal" etc. are based on the directions or positional relationships shown in the accompanying drawings.

[0026] like Figure 1 、 Figure 2As shown, the heat dissipation structure of an electrical distribution cabinet provided by the present invention includes an outer cabinet body 1 and an outer cover 2 to form a device shell. The outer cabinet body 1 is detachably provided with an inner frame 3, and the inner frame 3 can be covered by an inner cover 4. The outer cabinet body 1 and the outer cover 2, as well as the inner frame 3 and the inner cover 4, are respectively fixed by screws; a power supply 15, a transformer 16 and other equipment are arranged inside the inner frame 3; the outer cover 2 and the outer cabinet body 1, as well as the inner cover 4 and the inner frame 3, are respectively connected by screws, and the front and rear outer walls of the inner frame 3 and the front and rear inner walls of the outer cabinet body 1 are respectively connected. An air outlet cavity and an air inlet cavity can be formed respectively. A plurality of power input and output connectors 20 are provided on the outside of the outer cabinet 1, and holes for cables to pass through and out are provided on the side walls of the inner frame 3 (not shown in the figure); air outlet holes and air inlet holes are also provided on the front and rear walls of the inner frame 3, respectively. The interior of the inner frame 3 can be connected with the air inlet cavity through the air inlet hole, and connected with the air outlet cavity through the air outlet hole. Therefore, when an induced draft fan 5 is provided at the air outlet hole in this embodiment, air flow can enter the inner frame 3 from the air inlet cavity, and then be drawn out by the induced draft fan 5, thereby taking away the heat generated by the electrical equipment in the inner frame 3.

[0027] At the same time, reference Figure 1 As shown, in this embodiment, an air outlet duct 6 and an air inlet duct 7 are provided on the top of the outer cover 2. The upper parts of the air outlet duct 6 and the air inlet duct 7 are both inverted U structures. The inverted U structure can prevent rainwater from directly entering the pipe. The lower part of the air inlet duct 7 passes through the outer cover 2 and extends from the outer cover 2 into the interior of the device casing for a distance.

[0028] After the installation is completed, the air outlet duct 6 and the air inlet duct 7 are exposed to the ground and connected to the atmosphere; the bottom of the air outlet duct 6 and the air inlet duct 7 are connected to the air outlet cavity and the air inlet cavity respectively. Under the drive of the induced ventilator fan 5, the external air can be introduced into the inner frame 3 through the air inlet duct 7, the air inlet cavity, and the air inlet hole, and then led out of the inner frame 3 by the induced ventilator fan 5, thereby effectively cooling the electrical components inside the equipment.

[0029] Furthermore, in this embodiment, a filter is provided in the air inlet pipe 7, through which dust and water vapor in the air flow can be filtered. The second induced draft fan is provided in the air outlet pipe 6, through which the air flow in the air outlet cavity can be guided upward to the outer cabinet 1; Figure 3 As shown, the air inlet holes are multiple strip-shaped air inlet holes 8 arranged on the rear wall of the inner frame 3, and the strip-shaped air inlet holes 8 are vertically distributed. The air outlet holes are multiple circular air outlet holes 9 arranged on the front wall of the inner frame 3.

[0030] refer to Figure 1 、 Figure 3As shown, in this embodiment, a mounting plate 17 is provided on the front and rear sides of the top of the power supply 15, and on the front and rear sides of the top of the transformer 16; the power supply 15 and the transformer 16 can be hung on the left and right sides of the inner frame 3 via the mounting plates 17 respectively; preferably, the middle of the air outlet and the air inlet are aligned with the gap between the power supply 15 and the transformer 16; a rubber pad is also provided at the bottom of the inner cover 4, and when the inner cover 4 is covered with the top of the inner frame 3, the rubber pad can press the mounting plate 17 tightly.

[0031] Furthermore, in this solution, a concave cavity 10 is provided on the front wall of the outer cabinet body 1, and the concave cavity 10 faces the front side of the outer cabinet body 1; inside the concave cavity 10, a transverse heat dissipation strip 11 is provided on the front side of the bottom wall of the concave cavity 10; a removable mesh plate is provided on the front side of the concave cavity 10 to protect the transverse heat dissipation strip 11, and mounting plates 21 for installing the mesh plate are provided on the upper and lower sides of the transverse heat dissipation strip 11, and the transverse heat dissipation strip 11 and the wall of the concave cavity 10 form an integral structure.

[0032] In order to further accelerate heat dissipation, in this embodiment, reference Figure 1 As shown, a heat conducting plate is provided on the rear side of the bottom wall of the cavity 10, and the heat conducting plate is fixed to the rear side of the bottom wall of the cavity 10 by screws or bolts. A vertical heat dissipation strip 12 is integrated on the rear side of the heat conducting plate. The vertical heat dissipation strip 12 can absorb part of the heat of the gas in the air outlet cavity, and the vertical heat dissipation strip 12 is transferred outward to the horizontal heat dissipation strip 11, and then the heat is dissipated to the outside of the device casing through the horizontal heat dissipation strip 11, thereby realizing multi-mode combined heat dissipation.

[0033] In order to ensure the sealing performance of the equipment, further, in this embodiment, an outer waterproof ring 13 is provided between the outer cabinet body 1 and the outer cover 2, an inner protective frame 18 is extended upward at the inner edge of the top of the outer cabinet body 1, and an upper concave cavity is provided at the top of the outer cover 2 corresponding to the inner protective frame 18; an inner waterproof ring 19 is also provided on the top of the protective frame 18. When the outer cover 2 covers the top of the outer cabinet body 1, the inner wall of the top of the upper concave cavity can press the inner waterproof ring 19 tightly. The top of the inner protective frame 18 is provided with an outer edge. After installation is completed, the top of the inner waterproof ring 19 protrudes upward from the outer edge.

[0034] Installation steps of underground electrical cabinet:

[0035] S1. Install the inner frame 3 in the outer cabinet 1;

[0036] S2. Hang the power supply 15 and transformer 16 on the inner frame 3;

[0037] S4. Cover the inner cover 4 and tighten it onto the inner frame 3 with screws so that the mounting plate 17 is clamped between the inner cover 4 and the top of the inner frame 3.

[0038] S5. Place the outer waterproof ring 13 and the inner waterproof ring 19 on the top of the outer cabinet 1;

[0039] S6. Cover the outer cover 2 and fasten the outer cover 2 and the outer cabinet 1 with screws.

[0040] The above description is merely a preferred embodiment of the present invention. It should be understood that the present invention is not limited to the form disclosed herein and should not be construed as excluding other embodiments. Instead, the present invention can be used in various other combinations, modifications, and environments and can be modified within the scope of the concept described herein through the above teachings or techniques or knowledge in the relevant fields. Modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention are intended to be protected by the claims appended hereto.

Claims

1. A heat dissipation structure of an electrical distribution cabinet, characterized in that: It comprises an outer cabinet (1), an outer cover (2), an inner frame (3), an inner cover (4), a power supply (15), and a transformer (16), wherein the power supply (15) and the transformer (16) are installed inside the inner frame (3); The outer cover (2) is provided with screw holes corresponding one to one with the top of the outer cabinet (1) so as to be used for sealing the outer cabinet (1); The inner cover (4) is provided with screw holes corresponding one to one with the top of the inner frame (3) for sealing the inner frame (3); The inner frame (3) is arranged inside the outer cabinet (1), and an air outlet cavity and an air inlet cavity are respectively formed between the front and rear outer walls of the inner frame (3) and the front and rear inner walls of the outer cabinet (1); The front and rear walls of the inner frame (3) are respectively provided with air outlet holes and air inlet holes, and the air outlet holes and the air inlet holes are arranged correspondingly; An induced draft fan (5) is provided at the air outlet on the inner side of the front wall of the inner frame (3); The outer cover (2) is provided with an air outlet duct (6) on the front side of its top, and an air inlet duct (7) on the rear side of its top; The bottoms of the air outlet pipe (6) and the air inlet pipe (7) are respectively located above the air outlet cavity and the air inlet cavity, and are correspondingly connected to the air outlet cavity and the air inlet cavity.

2. The heat dissipation structure of the electrical distribution cabinet according to claim 1, characterized in that: The air inlet holes include a plurality of strip-shaped air inlet holes (8) arranged on the rear wall of the inner frame (3), and the air outlet holes include a plurality of circular air outlet holes (9) arranged on the front wall of the inner frame (3).

3. The heat dissipation structure of the electrical distribution cabinet according to claim 2, characterized in that: A mounting plate (17) is provided on the front and rear sides of the top of the power supply (15) and the front and rear sides of the top of the transformer (16). The power supply (15) and the transformer (16) can be respectively mounted on the left and right sides of the inner frame (3) via the mounting plate (17); A rubber pad is provided at the bottom of the inner cover (4). When the inner cover (4) is covered with the top of the inner frame (3), the rubber pad can press the mounting plate (17).

4. The heat dissipation structure of the electrical distribution cabinet according to claim 3, characterized in that: The air inlet pipe (7) is provided with a filter screen, and the air outlet pipe (6) is provided with an induced draft fan (2).

5. The heat dissipation structure of the electrical distribution cabinet according to claim 4, characterized in that: The front wall of the outer cabinet (1) is provided with a concave cavity (10), and the concave cavity (10) faces the front side of the outer cabinet (1); Inside the cavity (10), a transverse heat dissipation strip (11) is provided on the front side of the bottom wall of the cavity (10); A detachable mesh plate is provided on the front side of the cavity (10) for protecting the transverse heat dissipation strips (11).

6. The heat dissipation structure of the electrical distribution cabinet according to claim 5, characterized in that: The transverse heat dissipation strip (11) and the wall of the cavity (10) are an integral structure.

7. The heat dissipation structure of the electrical distribution cabinet according to claim 6, characterized in that: A heat conducting plate is provided on the rear side of the bottom wall of the cavity (10), and the heat conducting plate is fixed to the rear side of the bottom wall of the cavity (10) by screws or bolts. A vertical heat dissipation strip (12) is integrally provided on the rear side of the heat conducting plate.

8. The heat dissipation structure of the electrical distribution cabinet according to claim 6, characterized in that: An outer waterproof ring (13) is provided between the outer cabinet (1) and the outer cover (2).

9. The heat dissipation structure of an electrical distribution cabinet according to any one of claims 1 to 8, characterized in that: An inner protective frame (18) extends upward from the inner edge of the top of the outer cabinet (1), and an upper concave cavity is provided on the top of the outer cover (2) corresponding to the inner protective frame (18); The top of the inner protection frame (18) is also equipped with an inner waterproof ring (19). When the outer cover (2) covers the top of the outer cabinet (1), the inner wall of the top of the upper concave cavity can press the inner waterproof ring (19).

10. The heat dissipation structure of the electrical distribution cabinet according to claim 9, characterized in that: The top of the inner protective frame (18) is provided with an outer edge, and after installation is completed, the top of the inner waterproof ring (19) protrudes upwards from the outer edge.

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