Fan redundancy device for high-voltage electrical equipment

Abstract

The utility model provides a fan redundancy device for high-voltage electrical equipment, which comprises a plurality of fans arranged at the top of the high-voltage electrical equipment in parallel, an air inlet is arranged at the bottom of each fan, and an air outlet is arranged on the side wall of each fan; an air inlet of the fan is provided with a one-way mechanism, the one-way mechanism comprises a bottom frame, heat-resistant films and pressing plates, the bottom frame is provided with a plurality of air inlet holes arranged in an array mode, the heat-resistant films are arranged on the inner side, facing the fan, of the bottom frame, and the pressing plates press the middles of the heat-resistant films and are installed between the adjacent air inlet holes. And the heat-resistant films located on the two sides of the pressing plate are movable parts, and the movable parts at least completely cover the two rows of air inlet holes and open the air inlet holes along with starting of the draught fan or stop closing the air inlet holes along with stopping of the draught fan. According to the utility model, one-way circulation of wind can be realized, external wind is prevented from reversely flowing into high-voltage electrical equipment, wind path reverse flow is effectively prevented, and normal work of the fan for heat dissipation is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of heat dissipation of high-voltage electrical equipment, in particular to a fan redundancy device for high-voltage electrical equipment. Background Art

[0002] High-voltage inverters and other electrical equipment generally use forced air cooling to dissipate heat from heat-generating equipment. When dissipating heat, the equipment is equipped with multiple fans. When the fan reaches the end of its life or stops due to a fault, it will cause the equipment to overheat and stop working properly, which will cause a certain degree of loss to the customer; and the damaged fan will become an air inlet, causing reverse flow of the air path, further affecting the heat dissipation of the equipment. Utility Model Content

[0003] The utility model aims to provide a fan redundancy device for high-voltage electrical equipment to overcome the deficiencies in the prior art.

[0004] In order to solve the above technical problems, the technical solution of the utility model is: a fan redundancy device for high-voltage electrical equipment, comprising a plurality of fans arranged in parallel on the top of the high-voltage electrical equipment, each of the fans being provided with an air inlet at the bottom and an air outlet on the side wall; the air inlet of the fan is provided with a one-way mechanism, the one-way mechanism comprising a bottom frame, a heat-resistant film and a pressure plate, the bottom frame being provided with a plurality of air inlet holes arranged in an array, the bottom frame being provided with a plurality of heat-resistant films on the inner side facing the fan, the plurality of heat-resistant films being arranged in parallel along an arrangement direction of the air inlet holes, the pressure plate pressing the middle part of the heat-resistant film and being installed between adjacent air inlet holes, the heat-resistant films located on both sides of the pressure plate being a movable part, the movable part at least completely covering two columns of air inlet holes, and opening the air inlet holes when the fan is started or closing the air inlet holes when the fan is stopped.

[0005] Furthermore, in the above-mentioned fan redundancy device for high-voltage electrical equipment, the outer end surface of the movable part extends to the outside of the air inlet hole, and adjacent movable parts are connected by gaps.

[0006] Furthermore, in the above-mentioned fan redundancy device for high-voltage electrical equipment, the thickness of the heat-resistant film is 0.3-1 mm.

[0007] Furthermore, in the above-mentioned fan redundancy device for high-voltage electrical equipment, the heat-resistant film is made of rubber.

[0008] Furthermore, in the above-mentioned fan redundancy device for high-voltage electrical equipment, a cover plate is provided inside the bottom frame and is located above the heat-resistant film. The cover plate is used to prevent the heat-resistant film from being sucked into the fan, and is installed on the bottom frame through a support. A plurality of ventilation holes are provided on the cover plate.

[0009] Furthermore, in the above-mentioned fan redundancy device for high-voltage electrical equipment, the ventilation opening and the air inlet hole are arranged overlappingly.

[0010] Furthermore, in the above-mentioned fan redundancy device for high-voltage electrical equipment, the height from the bottom surface of the cover plate to the top surface of the pressure plate is greater than the length of the movable part.

[0011] Compared with the prior art, the beneficial effects of the utility model are: there is no need to set up a driving device, and the vents can be automatically opened or closed according to the start or stop status of the fan, thereby realizing one-way circulation of wind, preventing external wind from flowing back into high-voltage electrical equipment, effectively preventing wind path backflow, and ensuring that the standby fan can work normally to dissipate heat. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0013] Figure 1 This is a schematic diagram of the installation of a fan redundancy device for high-voltage electrical equipment of the utility model;

[0014] Figure 2 It is an exploded diagram of the fan redundancy device for high-voltage electrical equipment of the utility model;

[0015] Figure 3 It is a structural schematic diagram of a one-way mechanism of a fan redundancy device for high-voltage electrical equipment of the utility model;

[0016] Figure 4 It is a partial schematic diagram of the fan redundancy device for high-voltage electrical equipment of the utility model;

[0017] Figure 5 for Figure 4 A is a local enlarged schematic diagram;

[0018] In the figure: 1. fan; 11. air inlet; 12. air outlet; 2. bottom frame; 21. air inlet hole; 3. heat-resistant film; 31. movable part; 4. pressure plate; 5. cover plate; 51. vent; 6. support member. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] Example 1

[0021] like Figure 1-5 As shown, a fan redundancy device for high-voltage electrical equipment includes a plurality of fans 1 arranged in parallel on the top of the high-voltage electrical equipment, each of the fans 1 is provided with an air inlet 11 at the bottom and an air outlet 12 on the side wall; the air inlet 11 of the fan 1 is provided with a one-way mechanism, the one-way mechanism includes a bottom frame 2, a heat-resistant film 3, and a pressure plate 4, the bottom frame 2 is provided with a plurality of air inlet holes 21 arranged in an array, the bottom frame 2 is provided with a plurality of heat-resistant films 3 on the inner side facing the fan 1, and the plurality of heat-resistant films 3 are arranged in parallel along one arrangement direction of the air inlet holes 21, the pressure plate 4 presses the middle of the heat-resistant film 3 and is installed between adjacent air inlet holes 21, the heat-resistant films 3 located on both sides of the pressure plate 4 are movable parts 31, the movable parts 31 at least completely cover two rows of air inlet holes 21, and open the air inlet holes 21 when the fan 1 is started or close the air inlet holes 21 when the fan 1 is stopped. In this embodiment, the movable part 31 completely covers the three rows of air inlet holes 21.

[0022] When dissipating heat from high-voltage electrical equipment, redundancy is achieved by setting up multiple fans. In this embodiment, three fans 1 are included, one of which is a standby fan. When a fan fails, the standby fan starts, the equipment can continue to operate, and no wind path backflow occurs, thereby achieving the purpose of fan redundancy. In addition, when the fan 1 is started, the fan 1 draws air, and hot air enters from the air inlet 11. The heat-resistant film 3 is affected by this wind, and the movable part 31 automatically opens, and the air inlet 21 enters the air, and the fan 1 works normally; when the fan 1 fails, the fan 1 stops and no longer draws air, and the movable part 31 returns to a flat state under the action of gravity and the external wind entering from the air outlet, and automatically closes the air inlet 21, preventing the external wind from backflowing into the high-voltage electrical equipment; the one-way mechanism of the utility model does not need to set up a driving device, and can automatically open or close the vent according to the start or stop state of the fan, so as to achieve one-way circulation of wind, effectively prevent wind path backflow, and ensure that the standby fan can work normally for heat dissipation.

[0023] In the above structure, if Figure 4-5 As shown, the outer end surface of the movable part 31 extends to the outside of the air inlet hole 21, and the three outer ends of the movable part are all located outside the air inlet hole 21. Through this arrangement, it can be ensured that when the fan fails and air is entering the air outlet, the movable part 31 can completely cover the air inlet hole 21 to prevent external wind from entering the high-voltage electrical equipment; and the adjacent movable parts 31 are connected with gaps, and the gaps are small. This arrangement can ensure that when the fan fails, the heat-resistant film is in a flat state and fits on the bottom frame to avoid air leakage.

[0024] The thickness of the heat-resistant film 3 is 0.3-1 mm, and the film is made of heat-resistant materials such as rubber.

[0025] Example 2

[0026] Based on the structure of Example 1, Figure 2-3 As shown, a cover plate 5 located above the heat-resistant film 3 is further provided inside the bottom frame 2, and the cover plate 5 is used to prevent the heat-resistant film 3 from being sucked into the fan, and is installed on the bottom frame 2 through a support 6, and a plurality of ventilation holes 51 are provided on the cover plate 5; the ventilation holes 51 are arranged to overlap with the air inlet holes 21 to avoid air volume loss.

[0027] In the above structure, the height from the bottom surface of the cover plate 5 to the top surface of the pressure plate 4 is greater than the length of the movable part 31, which ensures that the heat-resistant film 3 is not sucked into the fan 1 when the fan is exhausting air, and at the same time ensures that the movable part 31 can be fully opened to avoid air volume loss caused by the movable part 31 not being fully opened.

[0028] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0029] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A fan redundancy device for high-voltage electrical equipment, characterized in that: It comprises a plurality of fans arranged in parallel on the top of the high-voltage electrical equipment, each of the fans being provided with an air inlet at the bottom and an air outlet on the side wall; the air inlet of the fan is provided with a one-way mechanism, the one-way mechanism comprising a bottom frame, a heat-resistant film and a pressure plate, the bottom frame being provided with a plurality of air inlet holes arranged in an array, the inner side of the bottom frame facing the fan is provided with a plurality of heat-resistant films, the plurality of heat-resistant films are arranged in parallel along an arrangement direction of the air inlet holes, the pressure plate presses the middle part of the heat-resistant film and is installed between adjacent air inlet holes, the heat-resistant films located on both sides of the pressure plate are movable parts, the movable parts at least completely cover two columns of air inlet holes, and open the air inlet holes when the fan is started or close the air inlet holes when the fan is stopped.

2. The fan redundancy device for high-voltage electrical equipment according to claim 1, characterized in that: The outer end surface of the movable part extends to the outside of the air inlet hole, and adjacent movable parts are connected with gaps.

3. The fan redundancy device for high-voltage electrical equipment according to claim 1, characterized in that: The thickness of the heat-resistant film is 0.3-1 mm.

4. The fan redundancy device for high-voltage electrical equipment according to claim 1, characterized in that: The heat-resistant film is made of rubber.

5. The fan redundancy device for high-voltage electrical equipment according to claim 1, characterized in that: A cover plate located above the heat-resistant film is also provided inside the bottom frame. The cover plate is used to prevent the heat-resistant film from being sucked into the fan and is installed on the bottom frame through a support. A plurality of ventilation holes are provided on the cover plate.

6. The fan redundancy device for high-voltage electrical equipment according to claim 5, characterized in that: The ventilation opening is arranged overlapping with the air inlet hole.

7. The fan redundancy device for high-voltage electrical equipment according to claim 5, characterized in that: The height from the bottom surface of the cover plate to the top surface of the pressing plate is greater than the length of the movable part.

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