Electrical switch cabinet

Abstract

The utility model discloses an electrical switch cabinet, which comprises a cabinet body, an internal circulation air pipe, an internal circulation fan, a heat dissipation air bellow and a heat dissipation fan, electrical elements are arranged in the cabinet body, an air outlet hole is formed in the upper end of the cabinet body, an air inlet hole is formed in the side wall of the bottom of the cabinet body, and an opening and closing door is movably connected to the front side of the cabinet body; the internal circulation air pipe is arranged on the outer side of the cabinet body, one end of the internal circulation air pipe is connected to the air inlet hole, and the other end of the internal circulation air pipe is connected to the air outlet hole; the internal circulation fan is arranged at the air inlet hole; the heat dissipation air bellow wraps the inner circulation air pipe, an air inlet is formed in one side of the heat dissipation air bellow, and an air outlet is formed in the opposite side of the heat dissipation air bellow; and the heat dissipation fan is arranged at the air inlet. The internal circulation of the air in the cabinet body is realized, and the air is cooled in the internal circulation process, so that the influence of external dust, water vapor, oil stain and the like can be isolated while the electrical elements in the cabinet body are cooled.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical equipment, in particular to an electrical switch cabinet. Background Art

[0002] As the load of the electrical switch cabinet increases, the current passing through the busbar in the switch cabinet becomes larger and larger. Due to factors such as the oxidation of the contact surface between the busbars, the contact resistance increases, and the aging of the components, the operating temperature of the busbar rises sharply under heavy load. Although the busbar contact surface can be treated to reduce the contact resistance or replace some aging components, and further reduce the busbar or component temperature. However, this treatment requires the switch cabinet to be shut down. If the switch cabinet is in operation and there is no plan to stop production, the shutdown of the switch cabinet will cause huge economic losses. In order to dissipate the heat of the electric cabinet, the invention patent with application number CN202110333792.4 discloses a self-heating substation cabinet, which belongs to the field of power distribution equipment technology. The self-heating transformer cabinet includes a main body, which is provided with a heat dissipation port 1 and a heat dissipation port 2, and the heat dissipation port 1 and the heat dissipation port 2 are respectively provided with a heat dissipation plate 1 and a heat dissipation plate 2, and the inner bottom wall and the inner top wall of the main body installation cavity are provided with a pushing mechanism for pushing the heat dissipation plate 1 and the heat dissipation plate 2 to move; the heat dissipation plate 1 is provided with a heat dissipation hole 1, the heat dissipation plate 1 is provided with an inner baffle plate 1, the inner baffle plate 1 is provided with a heat dissipation hole 2, and the heat dissipation plate 1 is provided with a sliding mechanism 1; the heat dissipation plate 2 is provided with a heat dissipation hole 3, the heat dissipation plate 2 is provided with an inner baffle plate 2, the inner baffle plate 2 is provided with a heat dissipation hole 4, and the heat dissipation plate 2 is provided with a sliding mechanism 2. In this scheme, the temperature inside the electric cabinet is lowered by exchanging air between the air inside the electric cabinet and the cold air outside. However, under certain special environments, the external humid or unclean air brings moisture or impurities to the electrical components in the cabinet, resulting in the consequences of reduced insulation performance of the equipment, which is not conducive to the safe operation of the equipment. If the scheme in the prior art is used, it is easy to cause damage to the electrical components inside the electric cabinet. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides an electrical switch cabinet, which can effectively solve the problem of poor heat dissipation of electrical components in the switch cabinet under harsh environments.

[0004] An electrical switch cabinet according to the first aspect of the utility model comprises a cabinet body, an internal circulation air duct, an internal circulation fan, a heat dissipation bellows and a heat dissipation fan; the cabinet body has built-in electrical components, the upper end of the cabinet body is provided with an air outlet, the bottom side wall of the cabinet body is provided with an air inlet, and the front side of the cabinet body is movably connected with a switch door; the internal circulation air duct is arranged on the outside of the cabinet body, one end of the internal circulation air duct is connected to the air inlet, and the other end is connected to the air outlet; the internal circulation fan is arranged at the air inlet; the heat dissipation bellows is wrapped around the outside of the internal circulation air duct, one side of the heat dissipation bellows is provided with an air inlet, and the opposite side is provided with an air outlet; the heat dissipation fan is arranged at the air inlet.

[0005] An electrical switch cabinet according to an embodiment of the utility model has at least the following beneficial effects: the air in the cabinet is internally circulated and cooled during the internal circulation process, and while cooling the electrical components inside the cabinet, it can also isolate the influence of external dust, water vapor, oil pollution, etc.

[0006] According to some embodiments of the present invention, the air inlet and the heat dissipation fan are both provided in plurality, and the air inlet and the heat dissipation fan correspond one to one.

[0007] According to some embodiments of the present invention, the plurality of air inlets are arranged along the extension direction of the internal circulation air duct.

[0008] According to some embodiments of the utility model, an air outlet grille is provided at the air outlet.

[0009] According to some embodiments of the utility model, a first temperature probe is built into the internal circulation air duct, and a temperature display is provided on the outside of the cabinet. The temperature display is electrically connected to the first temperature probe and outputs the test temperature of the first temperature probe. The first temperature probe is arranged between the air inlet and the heat dissipation bellows.

[0010] According to some embodiments of the utility model, a plurality of the heat dissipation fans are provided, and the first temperature probe is electrically connected to one of the heat dissipation fans to control the start and stop of one of the heat dissipation fans.

[0011] According to some embodiments of the utility model, a second temperature probe is built into the internal circulation air duct, the temperature display is electrically connected to the second temperature probe, and outputs the test temperature of the second temperature probe, and the second temperature probe is arranged between the air inlet and the heat dissipation bellows.

[0012] According to some embodiments of the present invention, the second temperature probe is electrically connected to the remaining heat dissipation fans to control the start and stop of the remaining heat dissipation fans.

[0013] According to some embodiments of the utility model, the portion of the inner circulation air duct passing through the heat dissipation air box is a serpentine structure.

[0014] According to some embodiments of the present invention, a third temperature probe is built into the cabinet, an alarm is provided at the upper end of the cabinet, and the third temperature probe is electrically connected to the alarm.

[0015] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention is further described below with reference to the accompanying drawings and embodiments, wherein:

[0017] Figure 1 A schematic diagram of an electrical switch cabinet in one direction according to an embodiment of the utility model;

[0018] Figure 2 A schematic diagram of an electrical switch cabinet in another direction according to an embodiment of the utility model;

[0019] Figure 3 The present invention is a cross-sectional schematic diagram of a heat dissipation bellows of an electrical switch cabinet according to an embodiment of the present invention.

[0020] 100, cabinet; 110, air outlet; 120, air inlet; 130, door opening and closing; 140, temperature display; 150, third temperature probe; 151, alarm;

[0021] 200, internal circulation air duct; 210, first temperature probe; 220, second temperature probe;

[0022] 300, internal circulation fan;

[0023] 400, cooling bellows; 410, air inlet; 420, air outlet; 421, air outlet grille;

[0024] 500, cooling fan; DETAILED DESCRIPTION

[0025] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0026] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do 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 on the present invention.

[0027] In the description of the present utility model, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0028] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0029] Reference Figure 1 and Figure 2 An electrical switch cabinet according to an embodiment of the utility model comprises a cabinet body 100, an internal circulation air duct 200, an internal circulation fan 300, a heat dissipation bellows 400 and a heat dissipation fan 500; the cabinet body 100 is equipped with electrical components, an air outlet 110 is arranged at the upper end of the cabinet body 100, an air inlet 120 is arranged at the bottom side wall of the cabinet body 100, and a switch door 130 is movably connected to the front side of the cabinet body 100; the internal circulation air duct 200 is arranged on the outer side of the cabinet body 100, one end of the internal circulation air duct 200 is connected to the air inlet 120, and the other end is connected to the air outlet 110; the internal circulation fan 300 is arranged at the air inlet 120; the heat dissipation bellows 400 is wrapped outside the internal circulation air duct 200, one side of the heat dissipation bellows 400 is provided with an air inlet 410, and the opposite side is provided with an air outlet 420; the heat dissipation fan 500 is arranged at the air inlet 410.

[0030] In actual use, the interior of the cabinet 100 is used to place various electrical components. After closing the switch door 130, the interior of the entire cabinet 100 is a closed space, isolating dust, water vapor, oil, etc. in a harsh environment. At the same time, the internal circulation fan 300 is driven to allow the air in the cabinet 100 to enter the internal circulation duct from the air outlet 110 at the upper end, and then re-enter the cabinet 100 from the air inlet 120 to form an air circulation. Among them, the hot air flowing out of the air outlet 110 will pass through the heat dissipation bellows when passing through the internal circulation air duct 200. 400, the heat dissipation fan 500 in the heat dissipation bellows 400 drives the cold air in the environment to enter from the air inlet 410 and flow out from the air outlet 420. During the flow of the cold air, heat exchange is achieved with the internal circulation air duct 200 inside the heat dissipation bellows 400, causing the hot air in the internal circulation air duct 200 to be cooled. Therefore, the temperature of the air flowing into the cabinet 100 from the air inlet 120 will be much lower than that of the air flowing out from the air outlet 110, and the cold air will fill the interior of the cabinet 100 to cool the electrical components.

[0031] In summary, the air in the cabinet 100 realizes internal circulation and is cooled during the internal circulation process. While cooling the electrical components inside the cabinet 100, it can also isolate the influence of external dust, water vapor, oil pollution, etc.

[0032] It should be mentioned that the density of hot air is less than that of cold air. Therefore, in the sealed cabinet 100, the cold air will naturally sink, and as the electrical components heat up, the hot air will float up, which can further enable most of the hot air to flow into the internal circulation duct at the air outlet 110.

[0033] In some embodiments, reference Figure 1 and Figure 3 , there are multiple air inlets 410 and heat dissipation fans 500, and the air inlets 410 and heat dissipation fans 500 correspond to each other. The multiple air inlets 410 can each take in air separately, avoiding the situation where some air flows backflow. At the same time, the multiple air inlets 410 are arranged along the extension direction of the inner circulation air duct 200. The amount of air for heat exchange in the inner circulation air duct 200 per unit time is increased, the time for air to be cooled is extended, and the cooling effect is improved. Furthermore, in order to further extend the heat exchange time of the internal air of the inner circulation air duct 200 and ensure that the overall size of the heat dissipation air box 400 is not too large, the part of the inner circulation air duct 200 that passes through the heat dissipation air box 400 is a serpentine structure.

[0034] In order to further improve the arrangement of air entering and exiting the heat dissipation air box 400 , an air outlet grille 421 is provided at the air outlet 420 .

[0035] It is worth mentioning that, refer to Figure 3The internal circulation air duct 200 is equipped with a first temperature probe 210, and a temperature display 140 is arranged on the outside of the cabinet 100. The temperature display 140 is electrically connected to the first temperature probe 210 and outputs the test temperature of the first temperature probe 210. The first temperature probe 210 is arranged between the air inlet 120 and the heat dissipation bellows 400. The first temperature probe 210 is used to detect the temperature of the air inside the cabinet 100 flowing out from the air outlet 110, and provide accurate temperature data to the user in real time through the temperature display 140. On the other hand, the internal circulation air duct 200 is built with a second temperature probe 220. The temperature display 140 is electrically connected to the second temperature probe 220, and outputs the test temperature of the second temperature probe 220. The second temperature probe 220 is arranged between the air inlet 120 and the heat dissipation bellows 400. The second temperature probe 220 is used to detect the temperature of the air that will flow into the cabinet 100 from the air inlet 120 after passing through the heat dissipation bellows 400, and provide accurate temperature data to the user in real time through the temperature display 140. The user can choose whether to turn on the heat dissipation fan 500, or how many heat dissipation fans 500 to turn on, according to the temperatures measured by the first temperature probe 210 and the second temperature probe 220, so as to save energy costs.

[0036] At the same time, in order to further realize the automation of start and stop, the first temperature probe 210 is electrically connected to one of the heat dissipation fans 500 to control the start and stop of the heat dissipation fan 500. When the temperature reaches the preset temperature in the first temperature probe 210, the first temperature probe 210 also acts as a switch to start the heat dissipation fan 500 electrically connected to the first temperature probe 210 and dissipate heat for the flowing air, while the second temperature probe 220 is electrically connected to the remaining heat dissipation fans 500 to control the start and stop of the remaining heat dissipation fans 500. When the temperature detected by the second temperature probe 220 reaches the preset value, the remaining multiple heat dissipation fans 500 are synchronously started to enhance the heat dissipation effect, and while ensuring the heat dissipation effect, the energy consumption utilization rate is ensured. It should be emphasized that the preset temperature T2 of the second temperature probe 220 should be higher than the preset temperature T1 of the first temperature probe 210. After the outflowing air temperature reaches T1, a cooling fan 500 is started. At this time, the temperature passing through the cooling bellows 400 should be reduced. If the cooling capacity is insufficient, the air flowing out of the air outlet 110 will continue to heat up, and after passing through the cooling bellows 400, it will still be higher than when the cooling fan 500 is just started. At this time, if the temperature T2 is reached, multiple cooling fans 500 need to be turned on simultaneously for heat dissipation.

[0037] It should be mentioned that if the heat dissipation efficiency is insufficient, resulting in a continuous rise in the temperature in the cabinet 100, in order to timely dissipate the high-temperature air in the cabinet 100, the cabinet 100 is provided with a third temperature probe 150, and an alarm 151 is provided at the upper end of the cabinet 100, and the third temperature probe 150 and the alarm 151 are electrically connected. When the temperature reaches the preset temperature of the third temperature probe 150, the alarm 151 is directly activated to inform the staff, who immediately shut down the electrical components in the cabinet 100 and open the switch door 130 for heat dissipation to avoid accidents.

[0038] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. An electrical switch cabinet, characterized in that: It comprises a cabinet (100), an internal circulation air duct (200), an internal circulation fan (300), a heat dissipation bellows (400) and a heat dissipation fan (500); The cabinet (100) has built-in electrical components, an air outlet (110) is provided at the upper end of the cabinet (100), an air inlet (120) is provided on the bottom side wall of the cabinet (100), and a switch door (130) is movably connected to the front side of the cabinet (100); The internal circulation air duct (200) is arranged on the outside of the cabinet (100), one end of the internal circulation air duct (200) is connected to the air inlet (120), and the other end is connected to the air outlet (110); The internal circulation fan (300) is arranged at the air inlet hole (120); The heat dissipation bellows (400) is wrapped around the inner circulation air duct (200), and an air inlet (410) is provided on one side of the heat dissipation bellows (400), and an air outlet (420) is provided on the opposite side; The heat dissipation fan (500) is arranged at the air inlet (410).

2. An electrical switch cabinet according to claim 1, characterized in that: The air inlet (410) and the heat dissipation fan (500) are both provided in plurality, and the air inlet (410) and the heat dissipation fan (500) correspond one to one.

3. An electrical switch cabinet according to claim 2, characterized in that: The plurality of air inlets (410) are arranged in an array along the extension direction of the internal circulation air duct (200).

4. An electrical switch cabinet according to any one of claims 1 to 3, characterized in that: An air outlet grille (421) is provided at the air outlet (420).

5. The electrical switch cabinet according to claim 1, characterized in that: The internal circulation air duct (200) is equipped with a first temperature probe (210), and a temperature display (140) is arranged on the outside of the cabinet (100). The temperature display (140) is electrically connected to the first temperature probe (210) and outputs the test temperature of the first temperature probe (210). The first temperature probe (210) is arranged between the air inlet hole (120) and the heat dissipation bellows (400).

6. An electrical switch cabinet according to claim 5, characterized in that: A plurality of the heat dissipation fans (500) are provided, and the first temperature probe (210) is electrically connected to one of the heat dissipation fans (500) to control the start and stop of one of the heat dissipation fans (500).

7. An electrical switch cabinet according to claim 6, characterized in that: The internal circulation air duct (200) is equipped with a second temperature probe (220), the temperature display (140) is electrically connected to the second temperature probe (220), and outputs the test temperature of the second temperature probe (220), and the second temperature probe (220) is arranged between the air inlet hole (120) and the heat dissipation bellows (400).

8. An electrical switch cabinet according to claim 7, characterized in that: The second temperature probe (220) is electrically connected to the remaining heat dissipation fans (500) to control the start and stop of the remaining heat dissipation fans (500).

9. The electrical switch cabinet according to claim 1, characterized in that: The portion of the internal circulation air duct (200) that passes through the heat dissipation air box (400) is a serpentine structure.

10. The electrical switch cabinet according to claim 1, characterized in that: The cabinet (100) has a built-in third temperature probe (150), an alarm (151) is provided at the upper end of the cabinet (100), and the third temperature probe (150) and the alarm (151) are electrically connected.

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