Digital low-voltage distribution box

Abstract

The utility model relates to the field of accessories and parts of a distribution box, in particular to a digital low-voltage distribution box. A distribution box comprises a box body, an air inlet channel and an exhaust channel are arranged on the box body, a temperature sensor for monitoring the temperature in the box body is arranged in the box body, a fan is arranged at the position of the air inlet channel and / or the exhaust channel, and when the temperature sensor transmits a high-temperature signal to a controller, the controller controls the fan to be started. A dustproof sealing door is movably installed at the position, corresponding to the air inlet channel and / or the exhaust channel, of the box body, the dustproof sealing door is provided with a driving mechanism, the driving mechanism is connected with the controller, when the fan is started, the controller controls the driving mechanism to drive the dustproof sealing door to open the corresponding channel, and when the fan stops, the driving mechanism drives the dustproof sealing door to open the corresponding channel. And the controller controls the driving mechanism to drive the dustproof sealing door to seal the corresponding channel, so that the problem that the safety of the distribution box in use is influenced by impurity accumulation caused by normally open heat dissipation holes in the distribution box in the prior art is solved.

Description

Technical Field

[0001] The utility model relates to the field of accessories and components of a distribution box, in particular to a digital low-voltage distribution box. Background Art

[0002] With the development of urban power distribution networks, existing distribution boxes usually integrate a large number of electrical components with high heat generation. These electrical components will age prematurely and shorten their service life if they work in a high temperature environment for a long time, affecting the reliability of power supply.

[0003] The Chinese utility model patent with the authorization announcement number CN210092651U discloses a low-voltage distribution box with strong heat dissipation, including a temperature sensor, a controller, and an air inlet and outlet ducts. An exhaust fan is provided on the air outlet duct. When the temperature reaches a certain level, the temperature sensor sends a signal to the controller, and the controller starts the exhaust fan. The exhaust fan discharges the high-temperature gas in the box and replenishes air into the box through the air inlet duct, thereby completing the gas exchange. When the temperature drops to a certain level, the exhaust fan stops.

[0004] However, the air inlet and outlet ducts of the device are always kept in an open state. Even if the exhaust fan is in a stopped state, dust, fine impurities or debris will enter the device. After working for a period of time, a certain amount of dust and impurities will accumulate in the device, affecting the safety of the distribution box when in use. Utility Model Content

[0005] The utility model aims to provide a digital low-voltage distribution box to solve the problem in the prior art that the heat dissipation holes on the distribution box are always open, resulting in the accumulation of impurities such as dust and affecting the safety of electrical components inside the box during use.

[0006] A distribution box comprises a box body, on which an air intake passage and an exhaust passage are arranged, a temperature sensor for monitoring the temperature inside the box body is arranged inside the box body, the temperature sensor transmits the measured temperature data to a controller, a fan is arranged at the air intake passage and / or the exhaust passage, when the temperature sensor transmits a high temperature signal to the controller, the controller controls the fan to start, a dust-proof door is movably installed on the box body at a position corresponding to the air intake passage and / or the exhaust passage, the dust-proof door is configured with a driving mechanism, the driving mechanism is connected to the dust-proof door through a transmission connection structure and drives the dust-proof door to move to open and close the corresponding channel, the driving mechanism is connected to the controller, when the fan starts, the controller controls the driving mechanism to drive the dust-proof door to open the corresponding channel, and when the fan stops, the controller controls the driving mechanism to drive the dust-proof door to close the corresponding channel.

[0007] Furthermore, among the two opposite side walls of the box body, an air intake channel is provided on one of the side walls, and an exhaust channel is provided on the other side wall, and the exhaust channel is at the top of the corresponding side wall, and the air intake channel is at the bottom of the corresponding side wall, and dustproof sealing doors are provided at both the exhaust channel and the air intake channel.

[0008] Furthermore, the transmission connection structure includes a side transmission arm extending along the side wall where the air intake channel is located and a top transmission arm extending along the top wall of the box body. The side transmission arm and the top transmission arm are transmission connected. The side transmission arm is transmission connected to the dust-proof sealing door at the air intake channel, and the top transmission arm is transmission connected to the dust-proof sealing door at the exhaust channel. The driving mechanism is transmission connected to one of the transmission arms.

[0009] Furthermore, the side transmission arms and the top transmission arms are both movably arranged on the corresponding box walls of the box body in a guided manner along their own length directions.

[0010] Furthermore, at two ends of the side transmission arm and the top transmission arm that are close to each other, a pin is provided on one end and an inclined groove is provided on the other end, and the cooperation of the pin and the inclined groove enables the guided movement of one to drive the guided movement of the other.

[0011] Furthermore, the dustproof door at the exhaust channel is installed on the box body and rotates around a horizontal axis. The top transmission arm and the rotating shaft of the dustproof door are transmitted through a gear rack structure. When the top transmission arm moves back and forth, it drives the dustproof door to flip to open and close the exhaust channel.

[0012] Furthermore, the dustproof sealing door at the air inlet passage is installed on the side wall of the box body and is guided to move in the up and down directions. The side transmission arm is connected to the dustproof sealing door and drives it to move up and down to realize the opening and closing of the air inlet passage.

[0013] Furthermore, the driving mechanism is arranged on the top wall of the box body and is transmission-connected to the top transmission arm.

[0014] Furthermore, the driving mechanism is an electric push rod extending along the length direction of the top transmission arm, and the linear motion output end of the electric push rod is connected to the top transmission arm.

[0015] The utility model improves the prior art, specifically: corresponding dustproof doors are set at the positions corresponding to the air inlet channels and / or exhaust channels to close the corresponding airflow channels, so that the airflow channels are generally in a closed state, and when the temperature in the box rises to a certain degree and reaches a specified temperature, the temperature sensor transmits a signal to the controller, and while the controller controls the fan to start, the controller also controls the drive mechanism to drive the dustproof door to open so that the corresponding channel is opened, and the airflow channel is connected to dissipate heat. After a certain period of heat dissipation, when the temperature in the box drops to a certain degree and reaches a specified temperature, the controller controls the fan to stop after receiving the temperature signal, and at the same time, the controller controls the drive mechanism to drive the dustproof door to close the corresponding channel. Through the coordination of the above structure, when the distribution box is in a certain temperature range, when the fan is not started, the device is always in a closed state, which greatly reduces the impurities and dust entering the device, and solves the problem in the prior art that the heat dissipation holes on the distribution box are often open, resulting in the accumulation of impurities such as dust, which affects the safety of the electrical components inside the box when in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The figure is a schematic diagram of the structure of an embodiment of a digital circuit breaker of the utility model;

[0017] Figure 2 for: Figure 1 The enlarged view of point A in the middle;

[0018] Figure 3 for: Figure 1 The enlarged view of point B in the middle;

[0019] Figure 4 for: Figure 1 Enlarged view of point C in the middle;

[0020] In the figure: 1. Box; 2. Circuit breaker; 3. Controller; 4. Data transmitter; 5. Temperature and humidity sensor; 6. Fan; 7. Current transformer; 8. Rotating seat; 9. Rotating shaft; 10. First dustproof door; 11. Sliding seat; 12. Second dustproof door; 13. Side transmission arm; 14. Top transmission arm; 15. Pin; 16. Bevel groove; 17. Electric push rod; 18. Rack; 19. Gear; 20. Inlet channel; 21. Exhaust channel; 22. Dehumidifier; 23. Rubber sleeve. DETAILED DESCRIPTION

[0021] The main concept of the distribution box of the utility model:

[0022] A distribution box includes a box body, on which an air intake channel for gas to enter the box body and an exhaust channel for gas to be discharged are arranged, and the air intake channel and the exhaust channel cooperate to form a complete airflow channel. A temperature sensor for monitoring the temperature in the box body is arranged in the box body, and the temperature sensor transmits the measured temperature data to a controller. A fan is arranged at the air intake channel and / or the exhaust channel, and the fan accelerates the gas exchange between the inside of the box body and the outside. When the temperature sensor transmits a high temperature signal to the controller, the controller controls the fan to start, and a dustproof door for closing the corresponding channel is movably installed on the box body at a position corresponding to the air intake channel and / or the exhaust channel. The dustproof door is configured with a driving mechanism, and the driving mechanism is connected to the dustproof door through a transmission connection structure and drives it to move to open and close the corresponding channel. The driving mechanism is connected to the controller. When the fan starts, the controller controls the driving mechanism to drive the dustproof door to open the corresponding channel. When the fan stops, the controller controls the driving mechanism to drive the dustproof door to close the corresponding channel.

[0023] Generally, the box body closes the corresponding channel through the dustproof door, making it difficult for the air inside the box to exchange with the outside world, and making it extremely difficult for impurities and dust from the outside world to enter the box. When the temperature inside the box reaches the corresponding temperature, the temperature sensor transmits a signal to the controller, and the controller controls the fan to start while controlling the drive mechanism to drive the dustproof door to open the corresponding channel, so that the airflow channel is connected, and cooperates with the fan to achieve gas exchange between the inside of the box and the outside world. When the temperature inside the box drops to a specified value, the temperature sensor transmits a signal to the controller, and the controller controls the fan to stop, and at the same time controls the drive mechanism to drive the dustproof door to close the corresponding channel.

[0024] By setting a corresponding driving mechanism and a dustproof door to seal the corresponding channel, under normal circumstances, the airflow channel is in a closed state, so that dust and other impurities are not easy to enter the box, and when the fan is started, the dustproof door is opened to allow the airflow channel to pass through. The above structure makes it extremely difficult for dust and impurities to enter the box, solving the problem in the prior art that the heat dissipation holes on the distribution box are always open, resulting in the accumulation of dust and other impurities, which affects the safety of the electrical components inside the box when in use.

[0025] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.

[0026] Embodiment 1 of the digital low-voltage distribution box of the utility model: (This embodiment is only an example of a low-voltage distribution box, and the corresponding structure can also be applied to a high-voltage distribution cabinet.)

[0027] like Figure 1-4As shown: a distribution box, including a box body 1, a box door is hinged on the front side of the box body 1, and the box door cooperates with the box body 1 to provide protection for the electrical appliances inside. Corresponding electrical components are arranged in the box body 1, and a circuit breaker 2 is provided on the rear side wall of the box body 1. The power supply cable is connected to the input end of the circuit breaker 2, and the utility cable is connected to the output end of the circuit breaker 2. The circuit breaker 2 controls the power line. A current transformer 7 is provided on the bottom wall of the box body 1. The cable passes through the detection hole of the current transformer 7. The current transformer 7 detects the current passing through the cable. A temperature sensor is provided on the right side wall of the box body 1, and a dehumidifier 22 is provided below the right side wall of the box body 11. The dehumidifier 22 circulates the air inside the box body 1, and the water vapor in the air is condensed and precipitated when it is cooled and discharged from the water pipe. The moisture content of the air is reduced to achieve dehumidification. A controller 3 is provided at the lower end of the left side wall of the box body 1, and a wireless data transmitter 4 is provided in the middle of the left side wall of the box body 1. The current transformer 7 and the temperature sensor are electrically connected to the controller 3, the dehumidifier 22 is electrically connected to the controller 3, the wireless data transmitter 4 is bidirectionally electrically connected to the controller 3, the input end of the controller 3 is electrically connected to an external power supply, the current transformer 7 transmits the current information to the controller 3, and the controller 3 transmits the current information to the background server through the wireless data transmitter 4 and the data network. Rubber sleeves 23 are provided at the wire holes on the lower surface of the box body 1. During the wiring process, the cable is passed through the rubber sleeve 23. The lower end of the rubber sleeve 23 is conical and can be in close contact with the outer arc surface of the cable to achieve sealing.

[0028] An air inlet channel 20 and an exhaust channel 21 are arranged on the box 1. A temperature sensor for monitoring the temperature in the box 1 is arranged in the box 1. The temperature sensor transmits the measured temperature data to the controller 3. A fan 6 is arranged at the exhaust channel 21 (of course, in other embodiments, a fan 6 can also be installed in the air inlet channel 20, or corresponding fans 6 can be installed in both the air inlet channel 20 and the exhaust channel 21). When the temperature sensor transmits a high temperature signal to the controller 3, the controller 3 controls the fan 6 to start. A dustproof door is movably installed on the box 1 at a position corresponding to the air inlet channel 20. The dustproof door is configured with a driving mechanism. The driving mechanism is connected to the dustproof door through a transmission connection structure and drives it to open and close the corresponding channel. The driving mechanism is connected to the controller 3. When the fan 6 is started, the controller 3 controls the driving mechanism to drive the dustproof door to open the corresponding channel. When the fan 6 is stopped, the controller 3 controls the driving mechanism to drive the dustproof door to close the corresponding channel. In this embodiment, the temperature sensor uses a temperature and humidity sensor 5 to measure the temperature. Of course, in other embodiments, a temperature sensor can be used to measure the temperature.

[0029] In order to improve the heat dissipation effect, the exhaust channel 21 and the intake channel 20 are generally arranged opposite to each other, for example, the intake channel 20 and the exhaust channel 21 are arranged on the two side walls in the width direction of the box body 1 and arranged opposite to each other. However, in order to further optimize the heat dissipation effect: in this embodiment, the intake channel 20 and the exhaust channel 21 are arranged in a staggered manner, and the exhaust channel 21 and the intake channel 20 are arranged on the two side walls in the width direction of the box body 1, and the exhaust channel 21 is at the top of the corresponding side wall, and the intake channel 20 is at the bottom of the corresponding side wall. And in order to improve the sealing performance of the box body 1 and prevent dust and other impurities from entering, preferably, dustproof doors are provided at the exhaust channel 21 and the intake channel 20.

[0030] Since the exhaust channel 21 is arranged at the top of the corresponding side wall, and the air intake channel 20 is arranged at the bottom of the corresponding side wall, the transmission connection structure includes a side transmission arm 13 extending along the side wall where the air intake channel 20 is located and a top transmission arm 14 extending along the top wall of the box body 1. The side transmission arm 13 is transmission-connected to the dust-proof door at the air intake channel 20, and the top transmission arm 14 is transmission-connected to the dust-proof door at the exhaust channel 21. The side transmission arm 13 and the top transmission arm 14 can be driven by two driving mechanisms respectively, but in order to save the internal space of the box body 1 and simplify the structure, and maintain the synchronization of the dust-proof door, it is preferred that: the side transmission arm 13 and the top transmission arm 14 are transmission-connected, and the driving mechanism is transmission-connected to one of the transmission arms. The top transmission arm 14 and the side transmission arm 13 are driven by a driving mechanism to move simultaneously to complete the opening and closing of the dust-proof door, which relatively simplifies the structure and saves the space in the box body 1; and the side transmission arm 13 and the top transmission arm 14 are both extended along the corresponding side wall, which further saves the space in the box body 1.

[0031] There are many ways for the side transmission arm 13 and the top transmission arm 14 to move relative to the box body 1 so as to drive the dustproof door to move and then open the corresponding airway. For example, the driving mechanism is a motor, which is arranged on the side wall of the box body 1 where the top transmission arm 14 is located, and the top transmission arm 14 is rotatably mounted on the top wall of the box body 1. The motor drives the top transmission arm 14 to rotate through the gear set, and at the same time, the top transmission arm 14 drives the side transmission arm 13 to rotate through the gear set. At this time, the first dustproof door 10 that closes the exhaust channel 21 is fixed to the end of the top transmission arm 14, and the first dustproof door 10 swings with the top transmission arm 14. The side transmission arm 13 is rotatably mounted on the corresponding side wall of the box body 1 and rotates with the top transmission arm 14. The side transmission arm 13 is provided with a thread, and the second dustproof door 12 that closes the air intake channel 20 is provided with a corresponding nut. The two cooperate to form a screw nut mechanism, and corresponding slide seats 11 are provided on both sides of the air intake channel 20. The second dustproof door 12 and the slide seat 11 are guided and slidably matched. When the exhaust channel 21 and the air inlet channel 20 are opened, the motor starts, the first dustproof sealing door 10 swings along with the top transmission arm 14, and makes way for the exhaust channel 21, and opens the exhaust channel 21. At the same time, the side transmission arm 13 rotates to drive the second dustproof sealing door 12 to rise, thereby making way for the air inlet channel 20. When the exhaust channel 21 and the air inlet channel 20 are closed, the motor starts, the first dustproof sealing door 10 swings along with the top transmission arm 14, and blocks the exhaust channel 21, and closes the exhaust channel 21. At the same time, the side transmission arm 13 rotates to drive the second dustproof sealing door 12 to descend, thereby closing the air inlet channel 20. However, in this way, both the top transmission arm 14 and the side transmission arm 13 need a certain amount of rotation space, otherwise direct contact with the corresponding side wall will generate great friction, and the space required is relatively large. Therefore, preferably: the side transmission arm 13 and the top transmission arm 14 are both guided and movable along their own length direction and configured on the corresponding box wall of the box body 1. For example, in this embodiment: the side transmission arm 13 and the top transmission arm 14 are guided to slide on the corresponding side walls of the box body 1. Corresponding guide structures are provided on the side walls corresponding to the side transmission arm 13 and the top transmission arm 14. For example, in this embodiment, two guide sleeves are provided on the corresponding side walls to achieve the guided sliding of the side transmission arm 13 and the top transmission arm 14. Compared with other methods, the side transmission arm 13 and the top transmission arm 14 are guided to move, and the required activity space is smaller, and it does not occupy a large space in the box body 1, saving space in the box body 1.

[0032] The side transmission arm 13 and the top transmission arm 14 are guided and slid on the corresponding side walls, and are connected by transmission structure. For example, at the two ends of the side transmission arm 13 and the top transmission arm 14 that are close to each other, a rack 18 is provided on the top transmission arm 14, a first transmission gear 19 is provided at a position corresponding to the top wall of the box body 1, and a second transmission gear 19 is provided at a position corresponding to the side wall of the box body 1, and the two transmission gears 19 are meshed with each other, a rack 18 is provided on the side transmission arm 13, the rack 18 on the side transmission arm 13 is meshed with the second transmission, and the gear 19 on the top transmission arm 14 is meshed with the first gear 19, thereby realizing the transmission connection between the side transmission arm 13 and the top transmission arm 14, and realizing that the guided sliding of one drives the guided sliding of the other. However, this method is relatively complex in structure, so preferably: one of the two ends of the side transmission arm 13 and the top transmission arm 14 that are close to each other is provided with a pin 15 at one end, and an inclined slot 16 at the other end, and the cooperation of the pin 15 and the inclined slot 16 is realized by the guiding movement of one to drive the guiding movement of the other. In this embodiment, the pin 15 is arranged on the top transmission arm 14, and the inclined slot 16 is an inclined slot 16 with a notch facing the side wall where the side transmission arm 13 is located and tilted upward, and the inclined slot 16 is arranged on the side transmission arm 13. Generally, the pin 15 is located at the notch, and at this time, the top transmission arm 14 moves toward the exhaust passage 21, and the side transmission arm 13 is driven to move downward by the cooperation of the pin 15 and the inclined slot 16. Of course, in other embodiments, the shape of the inclined slot 16 can also be other shapes, such as an inclined slot 16 with a notch facing away from the side wall where the side transmission arm 13 is located and tilted upward, or an inclined slot 16 with a notch facing the side wall where the side transmission arm 13 is located and tilted downward. And the inclined slot 16 can also be arranged on the top transmission arm 14, and the detent pin 15 can be arranged on the side transmission arm 13. These can be changed according to the requirements of the movement direction of the two.

[0033] There are also multiple ways to open the dustproof door of the exhaust passage 21. In this embodiment, two rotating seats 8 extending in the horizontal direction and parallel to the side wall where the exhaust passage 21 is located are installed on the top wall of the box body 1. The rotating seats 8 are equipped with corresponding rotating shafts 9. The first dustproof door 10 is passed through the rotating shafts 9 and rotates around the horizontal axis. The part of the rotating shaft 9 extending out of the rotating seat 8 is equipped with a gear 19. The top transmission arm 14 is equipped with a corresponding rack 18. The top transmission arm 14 and the rotating shaft 9 of the first dustproof door 10 are driven by the gear 19 rack 18 structure. When the top transmission arm 14 moves back and forth, it drives the first dustproof door 10 to flip to realize the opening and closing of the exhaust passage 21. When the top transmission arm 14 moves toward the exhaust passage 21, the first dustproof door 10 opens the exhaust passage 21. When the top transmission arm 14 moves away from the exhaust passage 21, the first dustproof door 10 closes the exhaust passage 21. The gear 19 and the rack 18 are used to cooperate, so that the first dustproof sealing door 10 rotates in a relatively stable structure, and is not prone to failure. In addition, the first dustproof sealing door 10 rotates to completely avoid the exhaust channel 21, so that the air flow is smoother. Of course, other methods can also be used in other embodiments, for example: the first dustproof sealing door 10 is fixed to the end of the top transmission arm 14, and moves with the first dustproof sealing door 10. The top transmission arm 14 is away from the exhaust channel 21, and the first dustproof sealing door 10 opens the exhaust channel 21. The top transmission arm 14 is close to the exhaust channel 21, and the first dustproof sealing door 10 closes the exhaust channel 21.

[0034] There are many ways to open the air inlet channel 20. In this embodiment, the second dustproof sealing door 12 at the air inlet channel 20 is installed on the side wall of the box body 1 in a guided and movable manner in the up-down direction, and the side transmission arm 13 is connected to the second dustproof sealing door 12 and drives it to move up and down to realize the opening and closing of the air inlet channel 20. Slide seats 11 are installed on both sides of the air inlet channel 20, and the second dustproof sealing door 12 is guided and slidably installed on the slide seats 11 and slides in the up-down direction. The second dustproof sealing door 12 is provided with an opening that matches the shape of the air inlet channel 20. Generally, the second dustproof sealing door 12 closes the air inlet channel 20. When the air inlet channel 20 needs to be opened, the side transmission arm 13 moves downward to overlap the opening on the second dustproof sealing door 12 with the air inlet channel 20, and the air inlet channel 20 is opened. Of course, in other embodiments, the side transmission arm 13 can also be raised to drive the second dustproof sealing door 12 to rise, so as to open the air inlet channel 20. Of course, in other embodiments, other methods can also be used to open the air intake passage 20. For example, the second dustproof sealing door 12 is rotatably installed on the side wall of the box body 1, and there is a certain distance between the rotating shaft and the side wall of the box body 1. A gear is passed through the rotating shaft, and a rack is connected to the end of the side transmission arm 13. The second dustproof sealing door is driven to rotate through the cooperation of the gear and the rack, thereby opening the air intake passage.

[0035] The driving mechanism can be arranged on the top wall or the corresponding side wall. In this embodiment, the driving mechanism is arranged on the top wall of the box body 1 and is transmission-connected to the top transmission arm 14. Because there are not too many electrical components installed on the top of the distribution box, there is enough space to install the driving mechanism.

[0036] There are many types of driving mechanisms, for example, a motor and a lead screw nut mechanism are used, and the linear motion output end of the lead screw nut mechanism is connected to the side transmission arm 13, so that the side transmission arm 13 is guided to slide on the side wall. In this embodiment, the driving mechanism is an electric push rod 17 extending along the length direction of the top transmission arm 14, and the linear motion output end of the electric push rod 17 is connected to the top transmission arm 14. The electric push rod 17 is relatively small in size and occupies little space.

[0037] When the temperature and humidity sensor 5 detects that the temperature in the box 1 reaches the specified temperature, the controller 3 receives the temperature signal and controls the fan 6 installed in the exhaust passage 21 to start. At the same time, the controller 3 controls the electric push rod 17 to move, so that the top transmission arm 14 moves toward the exhaust passage 21, and drives the first dustproof sealing door 10 to rotate and open the exhaust passage 21 through the cooperation of the gear 19 and the rack 18. At the same time, under the cooperation of the inclined slot 16 and the pin 15, the side transmission arm 13 moves downward, driving the second dustproof sealing door 12 to slide downward, thereby opening the air intake passage 20. When the temperature in the box 1 drops to the specified value, the controller 3 receives the temperature signal, and the controller 3 controls the fan 6 to turn off, and controls the electric push rod 17 to move, so that the top transmission arm 14 moves away from the exhaust passage 21, and drives the first dustproof sealing door 10 to rotate and close the exhaust passage 21 through the cooperation of the gear 19 and the rack 18. At the same time, under the cooperation of the inclined slot 16 and the pin 15, the side transmission arm 13 moves upward, driving the second dustproof sealing door 12 to slide upward, thereby closing the air intake passage 20.

[0038] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. The patent protection scope of the present invention shall be based on the claims. All equivalent structural changes made using the description and drawings of the present invention shall be included in the protection scope of the present invention.

Claims

1. A distribution box, comprising a box body, an air intake channel and an exhaust channel arranged on the box body, a temperature sensor for monitoring the temperature inside the box body arranged inside the box body, the temperature sensor transmits the measured temperature data to a controller, a fan is arranged at the air intake channel and / or the exhaust channel, when the temperature sensor transmits a high temperature signal to the controller, the controller controls the fan to start, Features: A dustproof door is movably installed on the box body at a position corresponding to the air inlet channel and / or exhaust channel. The dustproof door is equipped with a driving mechanism. The driving mechanism is connected to the dustproof door through a transmission connection structure and drives it to open and close the corresponding channel. The driving mechanism is connected to the controller. When the fan is started, the controller controls the driving mechanism to drive the dustproof door to open the corresponding channel. When the fan is stopped, the controller controls the driving mechanism to drive the dustproof door to close the corresponding channel.

2. The distribution box according to claim 1, Features: Of the two opposite side walls of the box body, one is provided with the air inlet channel, and the other is provided with the exhaust channel, and the exhaust channel is located at the top of the corresponding side wall, and the air inlet channel is located at the bottom of the corresponding side wall, and both the exhaust channel and the air inlet channel are provided with the dustproof sealing doors.

3. The distribution box according to claim 2, Features: The transmission connection structure includes a side transmission arm extending along the side wall where the air intake channel is located and a top transmission arm extending along the top wall of the box body. The side transmission arm and the top transmission arm are transmission connected. The side transmission arm is transmission connected to the dust-proof sealing door at the air intake channel, and the top transmission arm is transmission connected to the dust-proof sealing door at the exhaust channel. The driving mechanism is transmission connected to one of the transmission arms.

4. The distribution box according to claim 3, Features: The side transmission arms and the top transmission arms are both movably arranged on the corresponding box walls of the box body along their own length directions.

5. The distribution box according to claim 4, Features: One of the two ends of the side transmission arm and the top transmission arm that are close to each other has a pin on its end and an inclined slot on its other end, and the cooperation of the pin and the inclined slot enables the guided movement of one to drive the guided movement of the other.

6. The distribution box according to claim 4, Features: The dustproof sealing door at the exhaust channel is installed on the box body and rotates around a horizontal axis. The top transmission arm and the rotating shaft of the dustproof sealing door are transmitted through a gear rack structure. When the top transmission arm moves back and forth, it drives the dustproof sealing door to flip to open and close the exhaust channel.

7. The distribution box according to claim 4, Features: The dustproof sealing door at the air inlet passage is installed on the side wall of the box body and is guided and moved in the up and down directions. The side transmission arm is connected to the dustproof sealing door and drives it to move up and down to realize the opening and closing of the air inlet passage.

8. The distribution box according to any one of claims 3 to 7, Features: The driving mechanism is arranged on the top wall of the box body and is transmission-connected to the top transmission arm.

9. The distribution box according to claim 8, Features: The driving mechanism is an electric push rod extending along the length direction of the top transmission arm, and the linear motion output end of the electric push rod is connected to the top transmission arm.

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