Temperature control device for circuit breaker

Abstract

The temperature control device comprises an outer shell, a heat dissipation mounting mechanism is arranged on one side in the outer shell, an air inlet mechanism is arranged in the outer shell on one side of the heat dissipation mounting mechanism, an air return partition plate is arranged in the outer shell on the other side of the heat dissipation mounting mechanism, and an air return opening is formed in the air return partition plate; an air return channel is formed between the side, away from the heat dissipation installation mechanism, of the air return partition plate and the outer shell, an air return filter element is arranged in the air return channel below the heat dissipation installation mechanism, a circuit breaker body is arranged in the outer shell, the circuit breaker body and the heat dissipation installation mechanism are installed, and a cooling box is arranged in the outer shell below the circuit breaker body. According to the circuit breaker, a series of structures are arranged, air cooling circulation type heat dissipation temperature control is achieved in the circuit breaker shell, the filtering function is achieved, the circuit breaker body is installed in a heat conduction supporting mode, the installation heat dissipation performance is good, circulation type large-area uniform air inlet is achieved in temperature control circulation in the circuit breaker shell, temperature control in the circuit breaker is uniform, and the temperature control deviation is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of circuit breaker temperature control, in particular to a temperature control device for a circuit breaker. Background Art

[0002] A circuit breaker is a switch device that can close, carry and disconnect current under normal circuit conditions and close, carry and disconnect current under abnormal circuit conditions within a specified time. Circuit breakers are divided into high-voltage circuit breakers and low-voltage circuit breakers according to their scope of use. The boundary between high and low voltage is relatively vague, and those above 3kV are generally called high-voltage electrical appliances.

[0003] At present, circuit breakers use internal and external circulation to dissipate heat. Although the heat dissipation is convenient, the inside of the circuit breaker shell is easily disturbed by external heat dissipation, such as dust, etc., and the heat dissipation inside the circuit breaker shell is limited by the number, position and size of the heat dissipation ports, resulting in differences in the heat dissipation inside the circuit breaker shell, resulting in uneven heat dissipation and large temperature control errors of the circuit breaker. Summary of the invention

[0004] The object of the present invention is to provide a temperature control device for a circuit breaker to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: a temperature control device for a circuit breaker, comprising an outer shell, a heat dissipation installation mechanism is provided on one side of the inner part of the outer shell, an air inlet mechanism is provided inside the outer shell on one side of the heat dissipation installation mechanism, a return air baffle is provided inside the outer shell on the other side of the heat dissipation installation mechanism, a return air port is provided on the return air baffle, a return air channel is formed between the side of the return air baffle away from the heat dissipation installation mechanism and the outer shell, a return air filter is provided in the return air channel below the heat dissipation installation mechanism, a circuit breaker body is provided inside the outer shell, the circuit breaker body is installed with the heat dissipation installation mechanism, and the circuit breaker A cooling box is provided inside the outer shell below the main body, and heat dissipation grooves are provided on the outer shells on opposite sides of the cooling box. Semiconductor refrigeration plates are provided on opposite sides of the cooling box, and the semiconductor refrigeration plates are arranged in the heat dissipation grooves. A No. 1 wind hood is provided at the lower end of the return air channel, and a circulating fan is provided inside the No. 1 wind hood. A No. 2 wind hood is provided at the lower end of the air inlet mechanism. The No. 1 wind hood and the No. 2 wind hood are connected by a cooling air duct, and the cooling air duct runs through the cooling box. A base is provided on the top of the outer shell, and heat dissipation fins are provided between the base and the circuit breaker body. A temperature sensor is provided inside the outer shell on one side of the base.

[0006] Preferably, the air intake mechanism includes an air intake baffle, an air inlet, an air intake channel, a centralized air guide plate, a side air guide plate and a rising air guide plate. An air intake baffle is provided inside the outer shell body of the circuit breaker body on the side away from the return air baffle. An air inlet is provided on the air intake baffle. An air intake channel is formed between the air intake baffle and the outer shell body. A centralized air guide plate and a side air guide plate are provided inside the air intake channel. A rising air guide plate is provided at the lower end of the air intake channel. The air intake channel on one side of the rising air guide plate is connected to the No. 2 wind hood.

[0007] Preferably, the heat dissipation mounting mechanism includes a mounting plate, a No. 1 heat sink, a No. 2 heat sink, a mounting groove and a mounting column. A mounting plate is provided on one side of the inner part of the outer shell, a No. 1 heat sink is provided on one side of the mounting plate, and a No. 2 heat sink is provided at both ends opposite to the No. 1 heat sink away from the mounting plate. Two No. 2 heat sinks are provided on the No. 1 heat sink, and a mounting groove is formed between the two No. 2 heat sinks and the No. 1 heat sink. A plurality of mounting columns are provided on the mounting plate, and mounting holes are provided on the mounting columns. The circuit breaker body is fixedly mounted inside the mounting groove by the mounting columns and bolts, and the No. 1 heat sink and the No. 2 heat sink are arranged in contact with the outer surface of the circuit breaker body.

[0008] Preferably, the return air filter element comprises a filter element skeleton, an end plate, a lower filter layer, an upper filter plate and a dehumidification plate, an end plate is provided on one side of the filter element skeleton, a T-shaped structure is arranged between the filter element skeleton and the end plate, a lower filter layer is provided at the lower end of the filter element skeleton away from the end plate, an upper filter plate is provided at the upper end of the filter element skeleton away from the end plate, a dehumidification plate is provided between the upper filter plate and the lower filter layer, an installation port is provided on the outer shell body on the return air channel below the circuit breaker body, the filter element skeleton is installed inside the return air channel through the installation port, a sealing gasket is provided between the filter element skeleton and the installation port, and the end plate and the outer shell body are fixed by bolts.

[0009] Preferably, a plurality of the centralized air guide plates and the side air guide plates are provided, and the centralized air guide plates are arranged in a trumpet-shaped structure with a large bottom opening.

[0010] Preferably, the number of the No. 1 heat sink and the number of heat sink fins are both provided, the mounting column is provided between two adjacent No. 1 heat sinks, a heat dissipation channel is formed between the two adjacent No. 1 heat sinks, and the diameter of the mounting column is smaller than the width of the heat dissipation channel.

[0011] Preferably, the cooling air duct inside the cooling box is arranged in a serpentine structure, and the No. 1 air hood and the No. 2 air hood are both arranged in a trumpet-shaped structure.

[0012] Preferably, a heat insulation layer is provided on the inner wall of the outer shell, and an insulating layer is provided on the surface of the heat insulation layer away from the outer shell.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. The temperature control device for the circuit breaker realizes the heat dissipation temperature control of the circuit breaker housing by means of the air inlet and return air outlet arranged inside the outer shell, and cooperates with the No. 1 wind cover, circulating fan, cooling box, semiconductor refrigeration sheet, cooling air duct and No. 2 wind cover, so as to enhance the anti-interference performance of the circuit breaker temperature control, and the return air filter element arranged in the return air channel makes the circuit breaker temperature control circulation have the function of filtering.

[0015] 2. The temperature control device for the circuit breaker realizes the installation of the heat sink heat conductive support inside the outer shell by means of the heat dissipation installation mechanism and the heat dissipation fins arranged inside the outer shell, and the installation groove formed between the first heat sink and the second heat sink cooperates with the installation column, so that the circuit breaker body is installed in the outer shell with good heat dissipation, which is beneficial to the installation temperature control of the circuit breaker.

[0016] 3. The temperature control device for the circuit breaker realizes the circulation-type large-area air intake of the temperature control circulation inside the circuit breaker housing through the cooperation of the air intake baffle plate arranged in the outer shell, the centralized air guide plate, the side air guide plate and the rising air guide plate in the air intake channel. The air intake is uniform, and the temperature control inside the circuit breaker is uniform in cooperation with the heat sink. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0018] Figure 2 For the present invention Figure 1 The enlarged structural diagram at A in the middle;

[0019] Figure 3 For the present invention Figure 1 The enlarged structural diagram at B in the middle;

[0020] Figure 4 It is a schematic diagram of the structure of the cooling box in the present invention;

[0021] Figure 5 It is a structural schematic diagram of a heat sink No. 1 in the present invention;

[0022] Figure 6 It is a schematic structural diagram of the lower filter layer in the present invention.

[0023] In the figure: 1. outer shell; 2. heat dissipation installation mechanism; 21. mounting plate; 22. No. 1 heat sink; 23. No. 2 heat sink; 24. mounting slot; 25. mounting column; 3. air inlet baffle; 31. air inlet; 32. air inlet channel; 33. centralized air guide plate; 34. side air guide plate; 35. rising air guide plate; 4. return air baffle; 41. return air outlet; 42. return air channel; 5. return air filter element; 51. filter element skeleton; 52. end plate; 53. lower filter layer; 54. upper filter plate; 55. dehumidification plate; 6. circuit breaker body; 7. cooling box; 8. cooling air duct; 9. semiconductor refrigeration plate; 10. No. 1 wind hood; 11. circulating fan; 12. No. 2 wind hood; 13. base; 14. heat dissipation fins. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the 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 limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0026] like Figures 1 to 6As shown, the temperature control device for circuit breaker of this embodiment comprises an outer shell 1, a heat dissipation installation mechanism 2 is provided on one side of the inner part of the outer shell 1, an air inlet mechanism is provided on the inner part of the outer shell 1 on one side of the heat dissipation installation mechanism 2, a return air baffle 4 is provided on the inner part of the outer shell 1 on the other side of the heat dissipation installation mechanism 2, a return air port 41 is provided on the return air baffle 4, a return air channel 42 is formed between the side of the return air baffle 4 away from the heat dissipation installation mechanism 2 and the outer shell 1, a return air filter element 5 is provided in the return air channel 42 below the heat dissipation installation mechanism 2, a circuit breaker body 6 is provided inside the outer shell 1, the circuit breaker body 6 is installed with the heat dissipation installation mechanism 2, a cooling box 7 is provided inside the outer shell 1 below the circuit breaker body 6, heat dissipation grooves are provided on the outer shell 1 on opposite sides of the cooling box 7, semiconductor refrigeration sheets 9 are provided on opposite sides of the cooling box 7, and the semiconductor refrigeration sheets 9 are provided in the heat dissipation grooves, a No. 1 wind cover 10 is provided at the lower end of the return air channel 42, a circulating fan 11 is provided inside the No. 1 wind cover 10, and a No. 2 wind cover 12 is provided at the lower end of the air inlet mechanism, The first wind hood 10 and the second wind hood 12 are connected by a cooling air duct 8, and the cooling air duct 8 runs through the cooling box 7. A base 13 is provided on the top of the outer shell 1, and a heat dissipation fin 14 is provided between the base 13 and the circuit breaker body 6. A temperature sensor is provided inside the outer shell 1 on one side of the base 13, and the output end of the temperature sensor is electrically connected to the input end of the control module, and the output end of the control module is electrically connected to the semiconductor refrigeration sheet 9 and the input end of the circulating fan 11. The air cooling circulation flow type heat dissipation temperature control inside the circuit breaker shell enhances the anti-interference performance of the circuit breaker temperature control. The return air filter element 5 provided in the return air channel 42 enables the circuit breaker temperature control circulation to have a filtering function. The heat dissipation installation mechanism 2 realizes the heat sink thermal conductive support installation of the circuit breaker body 6 inside the outer shell 1. The circuit breaker body 6 has good heat dissipation when installed, which is conducive to the installation and temperature control of the circuit breaker. The circulation type large-area air intake of the temperature control circulation inside the circuit breaker shell is uniform, and cooperates with the heat sink to make the temperature control inside the circuit breaker uniform and reduce the temperature control deviation.

[0027] Specifically, the air intake mechanism includes an air intake baffle 3, an air inlet 31, an air intake channel 32, a centralized air guide plate 33, a side air guide plate 34 and a rising air guide plate 35. An air intake baffle 3 is provided inside the outer shell 1 of the circuit breaker body 6 away from the return air baffle 4. An air inlet 31 is provided on the air intake baffle 3. An air intake channel 32 is formed between the air intake baffle 3 and the outer shell 1. A centralized air guide plate 33 and a side air guide plate 34 are provided inside the air intake channel 32. A rising air guide plate 35 is provided at the lower end of the air intake channel 32. The air intake channel 32 on one side of the rising air guide plate 35 is connected to the No. 2 wind hood 12. The cooled air enters the air intake channel 32 from the No. 2 wind hood 12. The air intake airflow The air encounters the rising air guide plate 35 and flows upward in the air inlet channel 32. The rising airflow passes through the concentrated air guide plate 33 to form a concentrated rising airflow. The concentrated rising airflow gradually disperses during the circulation in the air inlet channel 32. A part of the dispersed airflow encounters the side air guide plate 34 to form a side flow airflow. The side flow airflow and a part of the dispersed airflow flow together from the air inlet port 31 of the air inlet baffle plate 3 to the heat dissipation mounting mechanism 2 and the circuit breaker body 6. The airflow is continuously concentrated and dispersed during the rising circulation in the air inlet channel 32, so that the airflow can evenly supply air and dissipate heat to the circuit breaker body 6, the heat dissipation mounting mechanism 2, the heat dissipation fins 14 and the base 13 in the outer shell 1.

[0028] Furthermore, the heat dissipation mounting mechanism 2 includes a mounting plate 21, a first heat sink 22, a second heat sink 23, a mounting groove 24 and a mounting column 25. A mounting plate 21 is provided on one side of the interior of the outer shell 1, a first heat sink 22 is provided on one side of the mounting plate 21, and a second heat sink 23 is provided on both opposite ends of the first heat sink 22 away from the mounting plate 21. Two second heat sinks 23 are provided on the first heat sink 22, and a mounting groove 24 is formed between the two second heat sinks 23 and the first heat sink 22. A plurality of mounting columns 25 are provided on the mounting plate 21, and mounting holes are provided on the mounting columns 25. The circuit breaker body 6 is fixedly mounted inside the mounting groove 24 by the mounting columns 25 and bolts. The first heat sink 22 and the second heat sink 23 are arranged in contact with the outer surface of the circuit breaker body 6, and the first heat sink 22, the second heat sink 23 and the heat sink fins 14 conduct heat to the circuit breaker body 6 to dissipate heat.

[0029] Furthermore, the return air filter element 5 includes a filter element frame 51, an end plate 52, a lower filter layer 53, an upper filter plate 54 and a dehumidification plate 55. The end plate 52 is provided on one side of the filter element frame 51, and a T-shaped structure is arranged between the filter element frame 51 and the end plate 52. The lower end of the filter element frame 51 away from the end plate 52 is provided with a lower filter layer 53, and the upper end of the filter element frame 51 away from the end plate 52 is provided with an upper filter plate 54. A dehumidification plate 55 is provided between the upper filter plate 54 and the lower filter layer 53. The circuit breaker body 6, a mounting opening is provided on the outer shell 1 on one side of the return air duct 42 below, and the filter element frame 51 is installed in the return air duct 42 through the mounting opening. A sealing gasket is provided between the filter element frame 51 and the mounting opening, and the end plate 52 and the outer shell 1 are fixed by bolts. The return air filter element 5 and the outer shell 1 are easy to disassemble and assemble. The high-temperature air flows through the return air filter element 5 in the return air duct 42, and is filtered by the upper filter plate 54, the dehumidification plate 55 and the lower filter layer 53 on the filter element frame 51 in turn.

[0030] Furthermore, a plurality of concentrated wind guide plates 33 and side wind guide plates 34 are provided. The concentrated wind guide plates 33 are arranged in a trumpet-shaped structure with a large bottom opening. The windward surfaces of the concentrated wind guide plates 33, the side wind guide plates 34 and the rising wind guide plates 35 are all arranged with smooth curved surfaces, so that the wind is guided smoothly.

[0031] Furthermore, both the No. 1 heat sink 22 and the heat sink fins 14 are provided with a plurality of them, and the heat dissipation surface is large. The mounting column 25 is provided between two adjacent No. 1 heat sinks 22, and a heat dissipation channel is formed between the two adjacent No. 1 heat sinks 22. The diameter of the mounting column 25 is smaller than the width of the heat dissipation channel, and the mounting column 25 does not affect the flow of air in the heat dissipation channel.

[0032] Furthermore, the cooling air duct 8 inside the cooling box 7 is arranged in a serpentine structure, and the cooling air duct 8 has a large circulation contact surface in the cooling box 7. The No. 1 air hood 10 and the No. 2 air hood 12 are both arranged in a trumpet-shaped structure, and the internal space of the air hood is large.

[0033] Furthermore, a heat insulation layer is provided on the inner wall of the outer shell 1, and an insulating layer is provided on the surface of the heat insulation layer away from the outer shell 1, thereby increasing the heat insulation and insulating properties of the circuit breaker housing.

[0034] The method of using the present embodiment is as follows: the temperature sensor detects the temperature inside the circuit breaker housing, and when the detected temperature reaches the heat dissipation level, the cooling box 7 and the circulating fan 11 are started, and the coolant in the cooling box 7 is cooled by the semiconductor refrigeration sheet 9, and the high-temperature air inside the outer housing 1 enters the return air channel 42 through the return air port 41 on the return air partition 4 under the action of the circulating fan 11, and the high-temperature air flows through the return air filter element 5 in the return air channel 42, and is filtered through the upper filter plate 54, the dehumidification plate 55 and the lower filter layer 53 on the filter element skeleton 51 in turn, and the filtered air is The high-temperature air enters the cooling air duct 8 in the cooling box 7 from the No. 1 wind hood 10, and the high-temperature air is cooled in the cooling air duct 8. The cooled air enters the air inlet channel 32 from the No. 2 wind hood 12, and the air inlet airflow encounters the rising air guide plate 35 to guide the air to rise in the air inlet channel 32. The rising air inlet airflow passes through the concentrated air guide plate 33 to form a concentrated rising airflow. The concentrated rising airflow gradually disperses during the circulation in the air inlet channel 32. A part of the dispersed airflow encounters the side air guide plate 34 to form a side flow airflow. The side flow airflow and a part of the dispersed airflow are discharged from the air inlet 31 of the air inlet partition 3. The airflow flows toward the heat dissipation installation mechanism 2, the heat dissipation fins 14 and the circuit breaker body 6. The airflow is continuously concentrated and dispersed during the upward circulation in the air inlet channel 32, so that the airflow can evenly supply air and dissipate heat to the circuit breaker body 6, the heat dissipation installation mechanism 2, the heat dissipation fins 14 and the base 13 in the outer shell 1. Since the circuit breaker body 6 is fixedly installed in the installation groove 24 formed between the first heat dissipation fin 22 and the second heat dissipation fin 23 by bolts and mounting columns 25, the first heat dissipation fin 22, the second heat dissipation fin 23 and the heat dissipation fin 14 conduct heat to the circuit breaker body 6 and dissipate heat externally, and the outer shell is combined with the outer shell 1. The circulating heat dissipation inside the body 1 realizes the temperature control of the circuit breaker. The air cooling circulating heat dissipation temperature control inside the circuit breaker shell enhances the anti-interference performance of the circuit breaker temperature control. The return air filter 5 arranged in the return air channel 42 enables the circuit breaker temperature control circulation to have a filtering function. The heat dissipation installation mechanism 2 realizes the heat conduction support installation of the circuit breaker body 6 on the heat sink inside the outer shell 1. The circuit breaker body 6 has good heat dissipation, which is conducive to the installation and temperature control of the circuit breaker. The circulating large-area air intake of the temperature control circulation inside the circuit breaker shell is uniform, and cooperates with the heat sink to make the temperature control inside the circuit breaker uniform and reduce the temperature control deviation.

[0035] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A temperature control device for a circuit breaker, comprising an outer shell (1), characterized in that: A heat dissipation installation mechanism (2) is provided on one side of the outer shell (1), an air inlet mechanism is provided on the outer shell (1) on one side of the heat dissipation installation mechanism (2), a return air baffle (4) is provided on the other side of the outer shell (1) of the heat dissipation installation mechanism (2), a return air port (41) is provided on the return air baffle (4), a return air channel (42) is formed between the side of the return air baffle (4) away from the heat dissipation installation mechanism (2) and the outer shell (1), a return air filter element (5) is provided in the return air channel (42) below the heat dissipation installation mechanism (2), a circuit breaker body (6) is provided on the outer shell (1) below the circuit breaker body (6), the circuit breaker body (6) is mounted on the heat dissipation installation mechanism (2), a cooling box (7) is provided on the outer shell (1) below the circuit breaker body (6), and the cooling box (7) Heat dissipation grooves are provided on the outer shell (1) on opposite sides, semiconductor cooling plates (9) are provided on opposite sides of the cooling box (7), and the semiconductor cooling plates (9) are arranged in the heat dissipation grooves. A No. 1 wind cover (10) is provided at the lower end of the return air channel (42), and a circulating fan (11) is provided inside the No. 1 wind cover (10). A No. 2 wind cover (12) is provided at the lower end of the air inlet mechanism. The No. 1 wind cover (10) and the No. 2 wind cover (12) are connected by a cooling air duct (8), and the cooling air duct (8) runs through the cooling box (7). A base (13) is provided at the top of the outer shell (1), and a heat dissipation fin (14) is provided between the base (13) and the circuit breaker body (6). A temperature sensor is provided inside the outer shell (1) on one side of the base (13).

2. The temperature control device for circuit breaker according to claim 1, characterized in that: The air intake mechanism comprises an air intake baffle (3), an air intake port (31), an air intake channel (32), a centralized air guide plate (33), a side air guide plate (34) and a rising air guide plate (35); an air intake baffle (3) is provided inside the outer shell (1) of the circuit breaker body (6) on the side away from the return air baffle (4); an air intake port (31) is provided on the air intake baffle (3); an air intake channel (32) is formed between the air intake baffle (3) and the outer shell (1); a centralized air guide plate (33) and a side air guide plate (34) are provided inside the air intake channel (32); a rising air guide plate (35) is provided at the lower end inside the air intake channel (32); and the air intake channel (32) on the side of the rising air guide plate (35) is connected to the second air hood (12).

3. The temperature control device for circuit breaker according to claim 1, characterized in that: The heat dissipation installation mechanism (2) comprises a mounting plate (21), a first heat sink (22), a second heat sink (23), a mounting groove (24) and a mounting column (25). A mounting plate (21) is provided on one side of the interior of the outer shell (1). A first heat sink (22) is provided on one side of the mounting plate (21). Two second heat sinks (23) are provided on the first heat sink (22), and a mounting groove (24) is formed between the two second heat sinks (23) and the first heat sink (22). A plurality of mounting columns (25) are provided on the mounting plate (21), and mounting holes are provided on the mounting columns (25). The circuit breaker body (6) is fixedly mounted inside the mounting groove (24) by means of the mounting columns (25) and bolts. The first heat sink (22) and the second heat sink (23) are arranged in contact with the outer surface of the circuit breaker body (6).

4. The temperature control device for circuit breaker according to claim 1, characterized in that: The return air filter element (5) comprises a filter element frame (51), an end plate (52), a lower filter layer (53), an upper filter plate (54) and a dehumidification plate (55); the end plate (52) is provided on one side of the filter element frame (51); a T-shaped structure is arranged between the filter element frame (51) and the end plate (52); a lower filter layer (53) is provided at the lower end of the filter element frame (51) away from the end plate (52); an upper filter plate (54) is provided at the upper end of the filter element frame (51) away from the end plate (52); a dehumidification plate (55) is provided between the upper filter plate (54) and the lower filter layer (53); an installation opening is provided on the outer shell (1) on the return air channel (42) side below the circuit breaker body (6); the filter element frame (51) is installed inside the return air channel (42) through the installation opening; a sealing gasket is provided between the filter element frame (51) and the installation opening; and the end plate (52) and the outer shell (1) are fixed by bolts.

5. The temperature control device for circuit breaker according to claim 2, characterized in that: A plurality of the centralized air guide plates (33) and the side air guide plates (34) are provided, and the centralized air guide plates (33) are arranged in a trumpet-shaped structure with a large bottom opening.

6. The temperature control device for circuit breaker according to claim 3, characterized in that: A plurality of the first heat sinks (22) and the heat sink fins (14) are provided, the mounting column (25) is provided between two adjacent first heat sinks (22), a heat dissipation channel is formed between the two adjacent first heat sinks (22), and the diameter of the mounting column (25) is smaller than the width of the heat dissipation channel.

7. The temperature control device for circuit breaker according to claim 1, characterized in that: The cooling air duct (8) inside the cooling box (7) is arranged in a serpentine structure, and the No. 1 air hood (10) and the No. 2 air hood (12) are both arranged in a trumpet-shaped structure.

8. The temperature control device for circuit breaker according to claim 1, characterized in that: The inner wall of the outer shell (1) is provided with a heat insulation layer, and the surface of the heat insulation layer on a side away from the outer shell (1) is provided with an insulating layer.

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