Switch cabinet top plate ventilation and heat dissipation structure

Abstract

The utility model discloses a switch cabinet top plate ventilation and heat dissipation structure belongs to switch cabinet ventilation and heat dissipation technical field. Including: top plate has the first ventilation screen board of intercommunication bus chamber and the second ventilation screen board of intercommunication handcart chamber, bus chamber fan case is installed on top plate and will first ventilation screen board is enclosed in, handcart chamber fan case is installed on top plate and will second ventilation screen board is enclosed in. In switch cabinet top, adopt the bus chamber fan case of independent setting, handcart chamber fan case, carry out heat dissipation to bus chamber, handcart chamber respectively, simultaneously, bus chamber fan case is towards lateral surface (switch cabinet back) heat dissipation, and handcart chamber fan case utilizes the second fan subassembly of inclined setting and is used for the inclined side board of direction, will bus chamber fan case's exhaust air be guided to be obliquely upper, and the air passage of both does not interfere with each other, makes the exhaust air more smooth, has further promoted the effect of ventilation, heat dissipation.

Description

Technical Field

[0001] This utility model relates to a ventilation and heat dissipation structure for the top plate of a switch cabinet, belonging to the field of switch cabinet ventilation and heat dissipation technology. Background Technology

[0002] Switchgear, as a critical control and protection device in a power system, is typically divided into multiple functional compartments, with the truck compartment and busbar compartment being the two most essential parts. The truck compartment is mainly used to install circuit breaker and other switch operating mechanisms, characterized by frequent operation and relatively compact space; the busbar compartment is used to install busbars and connect circuits, serving as the core channel for current transmission. This compartmentalized structure helps improve operational safety and system stability.

[0003] Under high-current operating conditions, the heat generated by the circuit breaker opening and closing mechanism in the truck compartment is concentrated. Combined with the enclosed space and limited air circulation, localized overheating is likely to occur. Furthermore, the positional changes of the truck during insertion and removal can affect the continuity and stability of the heat dissipation path, thus requiring a certain degree of flexibility and automatic adaptability in the ventilation design. The busbar compartment primarily bears the large current from the main circuit, generating continuous and uniform heat. Currently, the heat dissipation paths for both the truck compartment and the busbar compartment are relatively simple, relying on lateral ventilation. However, due to the different operating conditions and heat dissipation requirements of the two compartments, the current cooling channels cannot effectively achieve efficient heat dissipation for both compartments.

[0004] Therefore, a ventilation and heat dissipation structure for the top plate of the switchgear is designed. It uses two independent fan boxes to dissipate heat from the handcart compartment and the busbar compartment respectively, and the heat dissipation paths of the two fan boxes are reasonably arranged so as to meet the protection level requirements and provide large-volume ventilation and heat dissipation. Summary of the Invention

[0005] The technical problem to be solved by this utility model is to provide a ventilation and heat dissipation structure for the top plate of the switch cabinet, which solves the problem that the heat generation of the current high current switch cabinet is large and the heat dissipation path needs to be further optimized.

[0006] The technical problem to be solved by this utility model is achieved by the following technical solution:

[0007] A ventilation and heat dissipation structure for the top plate of a switchgear includes:

[0008] The top plate has a first ventilation mesh plate connecting the busbar compartment and a second ventilation mesh plate connecting the handcart compartment;

[0009] The busbar chamber fan box is installed on the top plate and encloses the first ventilation mesh plate inside. The first fan assembly is installed on one side of the busbar chamber fan box, and an inclined side plate is installed on the other side opposite to the first fan assembly.

[0010] The handcart compartment fan box is installed on the top plate and encloses the second ventilation mesh plate inside. The side of the handcart compartment fan box facing the inclined side plate has a second fan assembly installed. The air outlet of the second fan assembly is guided obliquely upward by the inclined side plate.

[0011] As a preferred example, a pressure relief plate is sealed and installed on the top plate, and a pre-fabricated fracture line with a width of less than 1 mm is opened on the pressure relief plate.

[0012] As a preferred example, the air outlet direction of the first fan assembly faces the back of the switch cabinet.

[0013] As a preferred example, the included angle between the inclined side plate and the top plate is 30-60°.

[0014] As a preferred example, the first fan assembly consists of a first mounting plate, a first fan, and a first mesh plate. The side of the fan box in the busbar compartment is provided with a first opening for mounting the first mounting plate. The first fan is mounted on the first mounting plate, and the first mesh plate is mounted on the first mounting plate and completely covers the first fan. The aperture of the mesh of the first mesh plate is less than 1 mm.

[0015] As a preferred example, the first fan assembly is installed inside the busbar chamber fan box to prevent water droplets from entering within a 15° vertical direction of the first opening.

[0016] As a preferred example, the second fan assembly consists of a second mounting plate, a second fan, and a second mesh plate. The side of the handcart compartment fan box is provided with a second opening for the inclined installation of the second mounting plate. The second fan is installed on the second mounting plate, and the second mesh plate is installed on the second mounting plate and completely covers the second fan. The aperture of the mesh of the second mesh plate is less than 1mm.

[0017] As a preferred example, the angle between the mounting surface of the second fan and the top plate is 45-80°.

[0018] As a preferred example, the second fan assembly is installed inside the handcart compartment fan box to prevent water droplets from entering within a 15° vertical range of the second opening.

[0019] The beneficial effects of this utility model are:

[0020] 1. Independently installed fan boxes for the busbar compartment and the handcart compartment are used on the top of the switchgear to dissipate heat from the busbar compartment and the handcart compartment respectively. The two do not affect each other. The appropriate fan power can be matched according to the heat generation inside each compartment in order to maintain a better energy efficiency ratio.

[0021] 2. Meanwhile, the busbar compartment fan box dissipates heat to the side (back of the switchgear), while the handcart compartment fan box uses a second fan assembly set at an angle and a slanted side plate for guidance to guide the exhaust air of the busbar compartment fan box to the upper angle, forming an slanted air duct. The air ducts of the two do not interfere with each other, making the exhaust air smoother and further improving the ventilation and heat dissipation effect.

[0022] 3. The first fan assembly and the second fan assembly are covered by the fan box in the busbar compartment and the fan box in the handcart compartment, respectively, which can prevent water droplets from entering in the vertical direction within a certain range and improve the protection level. Attached Figure Description

[0023] Figure 1 This is a structural diagram of the back of the present invention;

[0024] Figure 2 This is a structural schematic diagram of the top slab;

[0025] Figure 3 This is a schematic diagram of the internal structure of this utility model;

[0026] Figure 4 This is a front structural diagram of the present invention.

[0027] In the picture:

[0028] 1. Top plate; 101. First ventilation mesh panel; 102. Second ventilation mesh panel; 103. Wiring hole; 104. U-shaped bracket;

[0029] 2. Busbar compartment fan box; 201. Sloping side plate; 202. First opening;

[0030] 3. Handcart compartment fan box; 301. Second opening;

[0031] 4. Pressure relief plate; 401. Pre-fabricated fracture line;

[0032] 5. First fan assembly; 501. First mounting plate; 502. First fan; 503. First mesh plate;

[0033] 6. Second fan assembly; 601. Second mounting plate; 602. Second fan; 603. Second mesh plate;

[0034] a. Side panel angle;

[0035] b. Fan angle. Detailed Implementation

[0036] To make the objectives, technical solutions, and beneficial effects of this application clearer, the technical solutions and beneficial effects of the embodiments of this application will be described in more detail below with reference to the accompanying drawings. The embodiments described herein are some, but not all, embodiments of this application, and the accompanying drawings are illustrative and intended to explain the solutions of this application. The embodiments and drawings should not be construed as limiting the solutions of this application.

[0037] like Figure 1 As shown, the ventilation and heat dissipation structure designed on the top plate 1 of the switchgear includes the top plate 1 fixed to the top of the switchgear, and the busbar compartment fan box 2 and the handcart compartment fan box 3 sealed and installed on the top plate 1 for ventilation and heat dissipation.

[0038] like Figure 2 As shown, the top plate 1 has two ventilation and heat dissipation openings, including a first ventilation mesh plate 101 connected to the interior of the busbar room and a second ventilation mesh plate 102 connected to the interior of the handcart room. An air inlet grille is installed at the bottom of the switchgear. Cool air enters the switchgear through the air inlet grille, absorbs internal heat, and is then discharged from the top through the first ventilation mesh plate 101 and the second ventilation mesh plate 102, thus achieving the purpose of ventilation and heat dissipation inside the switchgear.

[0039] like Figures 1-3 As shown, where Figure 1 The fan and mesh plate parts of the first fan assembly 5 and the second fan assembly 6 are omitted, and only the mounting plate used for fixing the fan is retained.

[0040] The busbar chamber fan box 2 is sealed and installed on the top plate 1, enclosing the first ventilation mesh plate 101 inside. The first fan assembly 5 is installed on one side of the busbar chamber fan box 2, and the inclined side plate 201 is installed on the other side opposite to the first fan assembly 5.

[0041] The busbar compartment fan box 2 is a closed box with openings at the bottom and sides. The bottom of the busbar compartment fan box 2 is mounted on the top plate 1 to form a suction space. The first fan assembly 5 is vertically installed inside the side opening, and the air outlet direction of the first fan assembly 5 faces the back of the switchgear. After the first fan assembly 5 is started, it draws out the internal hot air and discharges it to the back of the switchgear. Among them, the inclined side plate 201 not only guides the airflow inside the busbar compartment fan box 2 (guiding it from the upward direction of the first ventilation mesh plate 101 to the horizontal discharge direction), but also guides the exhaust duct of the handcart compartment fan box 3.

[0042] The handcart compartment fan box 3 is sealed and installed on the top plate 1, enclosing the second ventilation mesh plate 102 inside. The second fan assembly 6 is installed on the side of the handcart compartment fan box 3 facing the inclined side plate 201. The air outlet of the second fan assembly 6 is guided obliquely upward by the inclined side plate 201.

[0043] The handcart compartment fan box 3 is also a closed box with openings at the bottom and sides. A second fan assembly 6 is installed in the side opening, and the exhaust direction of the second fan assembly 6 is diagonally upward. It cooperates with the diagonal side plate 201 to form a diagonal air duct. The air ducts of the busbar compartment and the handcart compartment do not interfere with each other, making the exhaust smoother and further improving the ventilation and heat dissipation effect.

[0044] like Figure 2 As shown, a first ventilation mesh plate 101 and a second ventilation mesh plate 102, higher than the bottom surface of the top plate 1, are fixedly enclosed on the top plate 1. The first ventilation mesh plate 101 and the second ventilation mesh plate 102 are respectively provided with wiring holes 103 for the fan wires. A pair of parallel U-shaped brackets 104 are fixed to both sides of the first ventilation mesh plate 101 and the second ventilation mesh plate 102. The busbar compartment fan box 2 and the handcart compartment fan box 3 are respectively screwed and fixed to the U-shaped brackets 104, enclosing the first ventilation mesh plate 101 and the second ventilation mesh plate 102 inside. The U-shaped bracket 104 is a U-shaped strip bracket with its opening facing away from the first ventilation mesh plate 101 or the second ventilation mesh plate 102. One side of the bottom surface of the U-shaped bracket 104 is screwed and fixed to the bottom surface of the top plate 1, and the upper side is screwed and fixed to the bottom edge of the busbar compartment fan box 2 or the handcart compartment fan box 3. The raised first ventilation mesh 101 and second ventilation mesh 102 can effectively play a waterproof role. Water falling on the bottom surface of the top plate 1 of the switch cabinet cannot enter the switch cabinet through the first ventilation mesh 101 and second ventilation mesh 102, but can only overflow and be discharged with the bottom surface of the top plate 1.

[0045] like Figure 1 , Figure 2 As shown, in some embodiments, a pressure relief plate 4 is sealed and installed on the top plate 1, and a prefabricated fracture line 401 with a width of less than 1 mm is provided on the pressure relief plate 4.

[0046] When a severe fault such as an arc short circuit occurs inside the switchgear, the internal gas expands rapidly, forming high pressure. At this time, the pre-fabricated fracture line 401 on the pressure relief plate 4, as a preset pressure relief channel, will rupture first, guiding the high-temperature and high-pressure gas to be released in a predetermined direction (such as the upper part of the cabinet), avoiding the disorderly diffusion of pressure inside the cabinet, thereby reducing damage to the cabinet structure and adjacent equipment.

[0047] like Figure 3 As shown, in some embodiments, the included angle between the inclined side plate 201 and the top plate 1 is the side plate included angle α, which is 30-60°.

[0048] The inclined side plate 201 serves as a side plate with internal and external guiding functions. The included angle α of the side plate is preferably 45°, which can balance the internal and external guiding functions.

[0049] like Figure 3As shown, in some embodiments, the first fan assembly 5 is composed of a first mounting plate 501, a first fan 502, and a first mesh plate 503. The side of the fan box 2 in the busbar compartment is provided with a first opening 202 for mounting the first mounting plate 501. The first fan 502 is mounted on the first mounting plate 501, and the first mesh plate 503 is mounted on the first mounting plate 501 and completely covers the first fan 502. The mesh size of the first mesh plate 503 is less than 1 mm.

[0050] The first fan 502 is installed inside the first opening 202 of the busbar chamber fan box 2 using the first mounting plate 501, and a first mesh plate 503 with an aperture of less than 1 mm is used to block solid particles from the outside, enabling the structure to achieve an IP4X protection level ("4" indicates protection against solid foreign objects with a diameter ≥ 1.0 mm, and "X" indicates that waterproofing is not required). The first fan assembly 5 is installed inside the busbar chamber fan box 2 to prevent water droplets from dripping into the first opening 202 within a 15° vertical direction.

[0051] The first fan 502 is recessed and installed inside the first opening 202 of the fan box 2 in the busbar room. With the first mesh plate 503 with an aperture of less than 1mm, the protection level of this structure can reach IP42 ("4" means preventing solid foreign objects with a diameter of ≥1.0mm from entering, and "2" means preventing water droplets from entering within a 15° range in the vertical direction).

[0052] like Figure 3 As shown, in some embodiments, the second fan assembly 6 comprises a second mounting plate 601, a second fan 602, and a second mesh plate 603. The side of the handcart compartment fan box 3 is provided with a second opening 301 for inclined installation of the second mounting plate 601. The second fan 602 is mounted on the second mounting plate 601, and the second mesh plate 603 is mounted on the second mounting plate 601 and completely covers the second fan 602. The mesh size of the second mesh plate 603 is less than 1 mm. The second fan assembly 6 is installed inside the handcart compartment fan box 3 to prevent water droplets from dripping into the second opening 301 within a 15° vertical direction.

[0053] By retracting the second fan 602 and installing it inside the second opening 301 of the handcart compartment fan box 3, and cooperating with the second mesh plate 603 with an aperture of less than 1mm, the protection level of this structure can also reach IP42.

[0054] like Figure 3 As shown, in some embodiments, the angle between the mounting surface of the second fan 602 and the top plate 1 is the fan angle b, which is 45-80°.

[0055] like Figure 4As shown, the second fan assembly 6 can draw in the internal hot air and discharge it obliquely upwards, and cooperate with the oblique side plate 201 to form an oblique air duct. The fan angle b can be adjusted within the range of 45-80° as needed to improve the exhaust efficiency.

[0056] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection claimed by this utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A ventilation and heat dissipation structure for the top plate of a switchgear, characterized in that, include: The top plate has a first ventilation mesh plate connecting the busbar compartment and a second ventilation mesh plate connecting the handcart compartment; The busbar chamber fan box is installed on the top plate and encloses the first ventilation mesh plate inside. The first fan assembly is installed on one side of the busbar chamber fan box, and an inclined side plate is installed on the other side opposite to the first fan assembly. The handcart compartment fan box is installed on the top plate and encloses the second ventilation mesh plate inside. The side of the handcart compartment fan box facing the inclined side plate has a second fan assembly installed. The air outlet of the second fan assembly is guided obliquely upward by the inclined side plate.

2. The ventilation and heat dissipation structure for the top plate of a switchgear according to claim 1, characterized in that, A pressure relief plate is sealed and installed on the top plate, and a pre-fabricated fracture line with a width of less than 1 mm is opened on the pressure relief plate.

3. The ventilation and heat dissipation structure for the top plate of a switchgear according to claim 1, characterized in that, The air outlet direction of the first fan assembly is towards the back of the switch cabinet.

4. The ventilation and heat dissipation structure for the top plate of a switchgear according to claim 1, characterized in that, The angle between the inclined side plate and the top plate is the side plate angle, which is 30-60°.

5. The ventilation and heat dissipation structure for the top plate of a switchgear according to claim 1, characterized in that, The first fan assembly consists of a first mounting plate, a first fan, and a first mesh plate. The side of the fan box in the busbar compartment is provided with a first opening for mounting the first mounting plate. The first fan is mounted on the first mounting plate, and the first mesh plate is mounted on the first mounting plate and completely covers the first fan. The mesh size of the first mesh plate is less than 1 mm.

6. The ventilation and heat dissipation structure for the top plate of a switchgear according to claim 5, characterized in that, The first fan assembly is installed inside the busbar chamber fan box to prevent water droplets from entering within a 15° vertical range of the first opening.

7. The ventilation and heat dissipation structure for the top plate of a switchgear according to claim 1, characterized in that, The second fan assembly consists of a second mounting plate, a second fan, and a second mesh plate. The side of the handcart compartment fan box is provided with a second opening for the inclined installation of the second mounting plate. The second fan is installed on the second mounting plate, and the second mesh plate is installed on the second mounting plate and completely covers the second fan. The aperture of the mesh of the second mesh plate is less than 1mm.

8. The ventilation and heat dissipation structure for the top plate of a switchgear according to claim 7, characterized in that, The angle between the mounting surface of the second fan and the top plate is the fan angle, which is 45-80°.

9. The ventilation and heat dissipation structure for the top plate of a switchgear according to claim 7, characterized in that, The second fan assembly is installed inside the handcart compartment fan box to prevent water droplets from entering within a 15° vertical range of the second opening.

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