Temperature control and heat dissipation mechanism of distribution box

Abstract

The utility model relates to the technical field of distribution boxes, in particular to a temperature control and heat dissipation mechanism of a distribution box, which comprises a box body, a rectangular tube arranged on the left side of the inner wall of the box body, a detachable filter screen plate arranged in the rectangular tube, a first partition plate arranged in the box body, and a plurality of circular holes arranged at the top of the first partition plate. A refrigeration assembly is arranged in the box body and close to the bottom, a temperature sensor and a controller are arranged on the left side of the inner wall of the box body, an exhaust pipe penetrates through the middle of the top of the box body, and a first fan is arranged in the exhaust pipe. When the temperature sensor detects that the temperature in the box body reaches a set first threshold value, the controller controls the first fan to work, and when the temperature in the box body continuously rises and the temperature reaches a second threshold value set by the temperature sensor, the controller controls the second fan, the third fan and the semiconductor chilling plate to work. And the second fan conveys low-temperature airflow upwards, and cooling treatment in the box body is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of distribution boxes, in particular to a temperature control and heat dissipation mechanism of a distribution box. Background Art

[0002] The distribution box is a total circuit distribution box for all users of electricity. According to the requirements of electrical wiring, switchgear, measuring instruments, protective electrical appliances and auxiliary equipment are assembled in a closed or semi-closed metal cabinet or on a screen to form a low-voltage distribution device. During normal operation, the circuit can be connected or disconnected with the help of manual or automatic switches. In case of faults or abnormal operation, the circuit can be cut off or an alarm can be given with the help of protective electrical appliances. Various parameters in operation can be displayed with the help of measuring instruments, and certain electrical parameters can be adjusted. It can also prompt or send signals when deviating from the normal working state. It is often used in various power generation, distribution and substations.

[0003] The patent with publication number CN219181036U discloses a heat dissipation mechanism for a distribution box, specifically relating to the technical field of auxiliary equipment for distribution boxes, comprising a distribution box body, the side of the distribution box body being rotatably connected with an opening and closing door of the distribution box, the inside of the opening and closing door of the distribution box being fixedly connected with a ventilation and heat dissipation plate, the outer surface of the opening and closing door of the distribution box being fitted with a dust and windproof plate, the outer end of the opening and closing door of the distribution box being fixedly connected with a fixing column, the outer wall of the fixing column being wound with a contraction spring, the outer wall of the fixing column being sleeved with a movable sleeve rod, and the outer wall of the movable sleeve rod being provided with a rotation groove; the opening and closing door of the distribution box, the ventilation and heat dissipation plate, the contraction spring, the limit column, the pull handle, the limit plate and the clamping pad cooperate with each other, so that the dust and windproof plate can be effectively fixed and covered on the outer surface of the ventilation and heat dissipation plate, so that the ventilation and heat dissipation plate can enable the distribution box body to obtain an effective dustproof effect when the ventilation and heat dissipation plate does not have a heat dissipation effect, effectively extending the service life of the distribution box body.

[0004] The above-mentioned prior art fixes the dustproof and windproof plate on the outer surface of the ventilation and heat dissipation plate, so that the ventilation and heat dissipation plate can effectively prevent dust from reaching the distribution box body when the ventilation and heat dissipation plate does not have a heat dissipation effect. However, the distribution box is generally used continuously without power outages, and heat will be generated inside the distribution box when in use. The dustproof and windproof plate in the above-mentioned prior art can only be used when the distribution box is not in use, and has great limitations in use. As long as the distribution box is in use, dust is likely to enter the distribution box through the heat dissipation holes of the ventilation and heat dissipation plate. Therefore, the above-mentioned prior art can only play a small dust-proof role. If the dustproof and windproof plate is used all the time, the heat dissipation of the distribution box will be seriously affected, and the heat dissipation cannot be adaptively performed according to the working conditions of the distribution box. In view of this, we propose a temperature control and heat dissipation mechanism for the distribution box. Utility Model Content

[0005] The purpose of the utility model is to provide a temperature control and heat dissipation mechanism for a distribution box to solve the problems raised in the above background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] The temperature control and heat dissipation mechanism of the distribution box comprises a box body, a box door with a lock is hinged on the front side of the box body, a rectangular air inlet hole is provided on the left side of the box body and near the bottom, a rectangular tube is provided on the left side of the inner wall of the box body and at the position of the rectangular air inlet hole, a removable filter screen is provided in the rectangular tube, a first partition is provided in the box body and near the top of the rectangular tube, a plurality of circular holes arranged equidistantly from front to back are provided on the top of the first partition and near the right side, a refrigeration component is provided in the box body and near the bottom, A heat insulation board is provided in the middle and upper part of the left side of the inner wall of the box, a temperature sensor is provided on the right side of the heat insulation board, a controller is provided in the middle and lower part of the left side of the inner wall of the box, an exhaust pipe is provided through the middle part of the top of the box, a first fan is provided in the exhaust pipe, four support rods arranged in a matrix are provided at the top of the box and close to the outer wall of the exhaust pipe, the top ends of the four support rods are commonly connected to a dustproof top plate, the dustproof top plate is a truncated cone cover structure, and the top end of the exhaust pipe is located in the middle of the cavity of the dustproof top plate, which can prevent liquid and dust from entering the exhaust pipe;

[0008] The temperature inside the box is detected by a temperature sensor. When the temperature sensor detects that the temperature inside the box reaches a set first threshold, the controller controls the first fan to work and discharge the air inside the box to the outside, so that the heat inside the box is discharged from the exhaust pipe along with the airflow, and the outside air enters the rectangular tube from the rectangular air inlet hole. The filter plate in the rectangular tube filters the air to prevent dust from adhering to the equipment in the box, thereby achieving the effect of heat dissipation.

[0009] Preferably, U-shaped guide rails are provided on the upper and lower sides of the inner wall of the rectangular tube and close to the right side, and the filter screen is inserted between the two U-shaped guide rails. The front side of the filter screen passes through the front side of the inner wall of the rectangular tube, which is convenient for the staff to disassemble and assemble the filter screen, thereby facilitating the staff to regularly clean the filter screen.

[0010] Preferably, a first circular tube is provided through the bottom of the first partition and near the right side. The first circular tube is located on the left side of the circular hole. A second fan is provided in the first circular tube. When the temperature sensor detects that the temperature in the box reaches a set second threshold, the value of the second threshold is greater than the value of the first threshold, and the controller controls the second fan to work. The second fan cooperates with the first fan to speed up the flow rate of air in the box, thereby accelerating the discharge of heat in the box.

[0011] Preferably, the refrigeration assembly includes a second partition fixedly connected to the inner wall of the box body, a semiconductor refrigeration sheet is embedded in the middle of the top of the second partition, a metal box is provided on the top of the second partition, the semiconductor refrigeration sheet is located in the metal box, the metal box is filled with coolant, and a plurality of refrigeration fins equidistantly arranged front to back are provided on the top of the metal box, the refrigeration fins are located on the right side of the rectangular tube, when the semiconductor refrigeration sheet is working, the top of the semiconductor refrigeration sheet is the cooling surface, the semiconductor refrigeration sheet cools the coolant, so that the metal box and the refrigeration fins cool the air in the box body, and the second fan delivers low-temperature airflow upward, which is beneficial to cooling the box body.

[0012] Preferably, a heat sink is provided at the bottom of the second partition, the bottom of the semiconductor refrigeration sheet is the heating surface, the bottom of the semiconductor refrigeration sheet is in contact with the top of the heat sink, and a plurality of heat sinks are arranged equidistantly from front to back at the bottom of the heat sink, so that the heat generated by the semiconductor refrigeration sheet during cooling can be dissipated.

[0013] Preferably, a circular air inlet hole is provided on the left side of the inner wall of the box and near the bottom, a second circular tube is provided on the left side of the inner wall of the box and located at the position of the circular air inlet hole, the second circular tube is located below the second partition plate, a third fan is provided in the second circular tube, a circular air outlet hole corresponding to the position of the circular air inlet hole is provided on the right side of the inner wall of the box, the airflow generated by the third fan can make the heat on the heat sink and the heat sink quickly discharged from the circular air outlet hole along with the airflow, which is beneficial to the refrigeration operation of the semiconductor refrigeration plate;

[0014] The first fan, the second fan, the third fan, the semiconductor refrigeration sheet, the temperature sensor and the controller all work with an external power supply. The first fan, the second fan, the third fan, the semiconductor refrigeration sheet and the temperature sensor are electrically connected to the controller through wires respectively. When the temperature sensor detects that the temperature in the box reaches the set first threshold, the controller controls the first fan to work. When the temperature in the box continues to rise, the temperature reaches the second threshold set by the temperature sensor, and the controller controls the second fan, the third fan and the semiconductor refrigeration sheet to work. The second fan cooperates with the first fan to speed up the flow rate of air in the box, thereby accelerating the discharge of heat in the box. At the same time, the semiconductor refrigeration sheet cools the coolant, so that the metal box and the refrigeration fins cool the air in the box, and the second fan transports low-temperature airflow upward, which is beneficial to cooling the box. The airflow generated by the third fan can make the heat on the heat sink and the heat sink quickly discharged from the circular air outlet along with the airflow, which is beneficial to the refrigeration operation of the semiconductor refrigeration sheet and effectively avoids the equipment in the distribution box from operating at high temperatures.

[0015] Preferably, dustproof nets are provided inside the circular air inlet, the circular air outlet and the rectangular air inlet, which play a certain dustproof role.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] 1. The temperature control and heat dissipation mechanism of the distribution box detects the temperature inside the box through a temperature sensor. When the temperature sensor detects that the temperature inside the box reaches a set first threshold, the controller controls the first fan to work and discharge the air inside the box to the outside, so that the heat inside the box is discharged from the exhaust pipe along with the airflow, and the outside air enters the rectangular tube from the rectangular air inlet hole. The filter plate in the rectangular tube filters the air to prevent dust from adhering to the equipment in the box, thereby achieving the effect of heat dissipation.

[0018] 2. The temperature control and heat dissipation mechanism of the distribution box, when the temperature inside the box continues to rise, the temperature reaches the second threshold value set by the temperature sensor, the controller controls the second fan, the third fan and the semiconductor refrigeration plate to work, the second fan cooperates with the first fan to speed up the flow rate of air in the box, so that the heat in the box is discharged faster, at the same time, the semiconductor refrigeration plate cools the coolant, so that the metal box and the refrigeration fins cool the air in the box, and the second fan delivers low-temperature airflow upward, which is beneficial to cooling the box.

[0019] 3. The temperature control and heat dissipation mechanism of the distribution box. The airflow generated by the third fan can quickly discharge the heat on the heat sink and the heat sink from the circular air outlet along with the airflow, which is beneficial to the refrigeration operation of the semiconductor refrigeration sheet and effectively avoids the equipment in the distribution box from operating at high temperature. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0021] Figure 2 It is one of the partial structural schematic diagrams of the utility model;

[0022] Figure 3 This is the second schematic diagram of the partial structure of the utility model;

[0023] Figure 4 It is a schematic diagram of the assembly structure of the first partition plate and the first round tube in the utility model;

[0024] Figure 5 It is a schematic diagram of the assembly structure of the rectangular tube and the filter screen plate in the utility model;

[0025] Figure 6 This is a schematic diagram of the assembly structure of the box body and the second round tube in the utility model;

[0026] Figure 7 It is a schematic diagram of the structure of the refrigeration component in the utility model.

[0027] In the figure: 1. box body; 10. rectangular air inlet; 11. exhaust pipe; 12. support rod; 13. circular air inlet; 14. circular air outlet; 2. box door; 3. first fan; 4. dustproof top plate; 5. first partition; 50. circular hole; 6. first circular tube; 7. second fan; 8. rectangular tube; 80. U-shaped guide rail; 9. refrigeration component; 90. second partition; 91. metal box; 92. refrigeration fin; 93. semiconductor refrigeration sheet; 94. heat sink; 95. heat sink; 15. filter screen; 16. second circular tube; 17. third fan; 18. heat insulation board; 19. temperature sensor; 20. controller. DETAILED DESCRIPTION

[0028] 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.

[0029] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships 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 referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0030] See also Figure 1-Figure 7 , the utility model provides a technical solution:

[0031] The temperature control and heat dissipation mechanism of the distribution box includes a box body 1, a box door 2 with a lock is hinged on the front side of the box body 1, a rectangular air inlet 10 is provided on the left side of the box body 1 and near the bottom, a rectangular tube 8 is provided on the left side of the inner wall of the box body 1 and at the position of the rectangular air inlet 10, a removable filter screen 15 is provided in the rectangular tube 8, a first partition 5 is provided in the box body 1 and near the top of the rectangular tube 8, a plurality of circular holes 50 are provided on the top of the first partition 5 and near the right side, a refrigeration component 9 is provided in the box body 1 and near the bottom, and the inner wall of the box 1 A heat insulation board 18 is provided in the middle and upper part of the left side, a temperature sensor 19 is provided on the right side of the heat insulation board 18, a controller 20 is provided in the middle and lower part of the left side of the inner wall of the box body 1, an exhaust pipe 11 is penetrated in the middle part of the top of the box body 1, a first fan 3 is provided in the exhaust pipe 11, four support rods 12 arranged in a matrix are provided at the top of the box body 1 and close to the outer wall of the exhaust pipe 11, the top ends of the four support rods 12 are commonly connected with a dustproof top plate 4, the dustproof top plate 4 is a truncated cone cover structure, and the top end of the exhaust pipe 11 is located in the middle of the cavity of the dustproof top plate 4, which can prevent liquid and dust from entering the exhaust pipe 11;

[0032] The temperature inside the box 1 is detected by the temperature sensor 19. When the temperature sensor 19 detects that the temperature inside the box 1 reaches a set first threshold, the controller 20 controls the first fan 3 to work and discharge the air inside the box 1 to the outside, so that the heat inside the box 1 is discharged from the exhaust pipe 11 along with the airflow, and the outside air enters the rectangular tube 8 from the rectangular air inlet 10. The filter plate 15 in the rectangular tube 8 filters the air to prevent dust from adhering to the equipment in the box 1, thereby achieving the effect of heat dissipation.

[0033] In this embodiment, U-shaped guide rails 80 are provided on the upper and lower sides of the inner wall of the rectangular tube 8 and close to the right side. The filter screen plate 15 is inserted between the two U-shaped guide rails 80. The front side of the filter screen plate 15 passes through the front side of the inner wall of the rectangular tube 8, which is convenient for the staff to disassemble and assemble the filter screen plate 15, thereby facilitating the staff to regularly clean the filter screen plate 15.

[0034] Specifically, a first circular tube 6 is provided through the bottom of the first partition 5 and near the right side. The first circular tube 6 is located on the left side of the circular hole 50. A second fan 7 is provided in the first circular tube 6. When the temperature sensor 19 detects that the temperature in the box 1 reaches a set second threshold value, the value of the second threshold value is greater than the value of the first threshold value, and the controller 20 controls the second fan 7 to work. The second fan 7 cooperates with the first fan 3 to speed up the flow rate of air in the box 1, thereby accelerating the discharge of heat in the box 1.

[0035] Furthermore, the refrigeration assembly 9 includes a second partition 90 fixedly connected to the inner wall of the box body 1, a semiconductor refrigeration sheet 93 is embedded in the middle of the top of the second partition 90, a metal box 91 is provided on the top of the second partition 90, the semiconductor refrigeration sheet 93 is located in the metal box 91, the metal box 91 is filled with coolant, and a plurality of refrigeration fins 92 are arranged equidistantly from front to back on the top of the metal box 91, and the refrigeration fins 92 are located on the right side of the rectangular tube 8. When the semiconductor refrigeration sheet 93 is working, the top of the semiconductor refrigeration sheet 93 is the refrigeration surface, and the semiconductor refrigeration sheet 93 cools the coolant, so that the metal box 91 and the refrigeration fins 92 cool the air in the box body 1, and the second fan 7 delivers low-temperature airflow upward, which is beneficial to cooling the inside of the box body 1.

[0036] Furthermore, a heat sink 94 is provided at the bottom of the second partition 90, and the bottom of the semiconductor refrigeration sheet 93 is a heating surface. The bottom of the semiconductor refrigeration sheet 93 is in contact with the top of the heat sink 94, and a plurality of heat sinks 95 are arranged equidistantly from front to back at the bottom of the heat sink 94, so that the heat generated by the semiconductor refrigeration sheet 93 during cooling can be dissipated.

[0037] Further, a circular air inlet hole 13 is provided on the left side of the inner wall of the box body 1 and near the bottom, a second circular tube 16 is provided on the left side of the inner wall of the box body 1 and located at the position of the circular air inlet hole 13, the second circular tube 16 is located below the second partition plate 90, a third fan 17 is provided in the second circular tube 16, a circular air outlet hole 14 corresponding to the position of the circular air inlet hole 13 is provided on the right side of the inner wall of the box body 1, and the airflow generated by the third fan 17 can make the heat on the heat sink 94 and the heat sink 95 be quickly discharged from the circular air outlet hole 14 along with the airflow, which is beneficial to the refrigeration operation of the semiconductor refrigeration plate 93;

[0038] The first fan 3, the second fan 7, the third fan 17, the semiconductor cooling sheet 93, the temperature sensor 19 and the controller 20 are all connected to an external power supply to work. The first fan 3, the second fan 7, the third fan 17, the semiconductor cooling sheet 93 and the temperature sensor 19 are electrically connected to the controller 20 through wires. When the temperature sensor 19 detects that the temperature in the box 1 reaches a set first threshold, the controller 20 controls the first fan 3 to work. When the temperature in the box 1 continues to rise, the temperature reaches a second threshold set by the temperature sensor 19, and the controller 20 controls the second fan 7, the third fan 17 and the semiconductor cooling sheet 93 works, the second fan 7 cooperates with the first fan 3 to speed up the flow rate of air in the box body 1, so that the heat in the box body 1 is discharged faster. At the same time, the semiconductor refrigeration sheet 93 cools the coolant, so that the metal box 91 and the cooling fins 92 cool the air in the box body 1, and the second fan 7 conveys low-temperature air flow upward, which is beneficial to the cooling treatment in the box body 1. The airflow generated by the third fan 17 can make the heat on the heat sink 94 and the heat sink 95 be quickly discharged from the circular air outlet 14 along with the airflow, which is beneficial to the cooling operation of the semiconductor refrigeration sheet 93 and effectively avoids the equipment in the distribution box from operating at high temperature.

[0039] Furthermore, dustproof nets are provided inside the circular air inlet 13, the circular air outlet 14 and the rectangular air inlet 10, which play a certain dustproof role.

[0040] When the temperature control and heat dissipation mechanism of the distribution box of this embodiment is in use, the temperature in the box body 1 is detected by the temperature sensor 19. When the temperature sensor 19 detects that the temperature in the box body 1 reaches the set first threshold, the controller 20 controls the first fan 3 to work and discharge the air in the box body 1 to the outside, so that the heat in the box body 1 is discharged from the exhaust pipe 11 along with the air flow, and the outside air enters the rectangular tube 8 from the rectangular air inlet 10. The filter screen 15 in the rectangular tube 8 filters the air to prevent dust from adhering to the equipment in the box body 1, thereby achieving the effect of heat dissipation; when the temperature in the box body 1 continues to rise, the temperature reaches the second threshold set by the temperature sensor 19, and the controller 2 0 controls the second fan 7, the third fan 17 and the semiconductor cooling sheet 93 to work. The second fan 7 cooperates with the first fan 3 to speed up the flow rate of the air in the box body 1, so that the heat in the box body 1 is discharged faster. At the same time, the semiconductor cooling sheet 93 cools the coolant, so that the metal box 91 and the cooling fins 92 cool the air in the box body 1, and the second fan 7 conveys low-temperature air flow upward, which is beneficial to the cooling treatment in the box body 1. The airflow generated by the third fan 17 can make the heat on the heat sink 94 and the heat sink 95 be quickly discharged from the circular air outlet 14 along with the airflow, which is beneficial to the cooling operation of the semiconductor cooling sheet 93 and effectively avoids the equipment in the distribution box from operating at high temperature.

[0041] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A temperature control and heat dissipation mechanism for a distribution box, comprising a box body (1), wherein a door (2) with a lock is hingedly connected to the front side of the box body (1), and characterized in that: A rectangular air inlet (10) is provided on the left side of the box body (1) and near the bottom; a rectangular tube (8) is provided on the left side of the inner wall of the box body (1) and at the position of the rectangular air inlet (10); a detachable filter screen (15) is provided in the rectangular tube (8); a first partition (5) is provided in the box body (1) and near the top of the rectangular tube (8); a plurality of circular holes (50) are provided on the top of the first partition (5) and near the right side and are arranged equidistantly from front to back; a refrigeration assembly (9) is provided in the box body (1) and near the bottom. A heat insulation board (18) is provided at the middle and upper part of the left side of the inner wall of the box body (1), a temperature sensor (19) is provided on the right side of the heat insulation board (18), a controller (20) is provided at the middle and lower part of the left side of the inner wall of the box body (1), an exhaust pipe (11) is provided through the middle part of the top of the box body (1), a first fan (3) is provided in the exhaust pipe (11), four support rods (12) arranged in a matrix are provided at the top of the box body (1) and close to the outer wall of the exhaust pipe (11), and the top ends of the four support rods (12) are commonly connected to a dustproof top plate (4).

2. The temperature control and heat dissipation mechanism of the distribution box according to claim 1 is characterized in that: U-shaped guide rails (80) are provided on both upper and lower sides of the inner wall of the rectangular tube (8) and close to the right side, and the filter screen plate (15) is inserted between the two U-shaped guide rails (80), and the front side of the filter screen plate (15) passes through the front side of the inner wall of the rectangular tube (8).

3. The temperature control and heat dissipation mechanism of the distribution box according to claim 1 is characterized in that: A first circular tube (6) is provided through the bottom of the first partition plate (5) and close to the right side. The first circular tube (6) is located on the left side of the circular hole (50). A second fan (7) is provided in the first circular tube (6).

4. The temperature control and heat dissipation mechanism of the distribution box according to claim 1 is characterized in that: The refrigeration assembly (9) comprises a second partition (90) fixedly connected to the inner wall of the box body (1), a semiconductor refrigeration plate (93) is embedded in the middle of the top of the second partition (90), a metal box (91) is provided on the top of the second partition (90), the semiconductor refrigeration plate (93) is located in the metal box (91), the metal box (91) is filled with cooling liquid, and a plurality of refrigeration fins (92) arranged equidistantly in the front and back are provided on the top of the metal box (91), and the refrigeration fins (92) are located on the right side of the rectangular tube (8).

5. The temperature control and heat dissipation mechanism of the distribution box according to claim 4, characterized in that: A heat sink (94) is provided at the bottom of the second partition (90); the bottom of the semiconductor refrigeration sheet (93) is a heating surface; the bottom of the semiconductor refrigeration sheet (93) is in contact with the top of the heat sink (94); and a plurality of heat sinks (95) are provided at the bottom of the heat sink (94) and are arranged equidistantly from front to back.

6. The temperature control and heat dissipation mechanism of the distribution box according to claim 1, characterized in that: A circular air inlet hole (13) is provided on the left side of the inner wall of the box body (1) and near the bottom; a second circular tube (16) is provided on the left side of the inner wall of the box body (1) and located at the position of the circular air inlet hole (13); a third fan (17) is provided in the second circular tube (16); and a circular air outlet hole (14) corresponding to the position of the circular air inlet hole (13) is provided on the right side of the inner wall of the box body (1).

7. The temperature control and heat dissipation mechanism of the distribution box according to claim 6, characterized in that: The circular air inlet (13), the circular air outlet (14) and the rectangular air inlet (10) are all provided with dustproof nets.

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