Alternating-current low-voltage power distribution cabinet

Abstract

The invention relates to the technical field of power distribution cabinets, and particularly discloses an alternating-current low-voltage power distribution cabinet which comprises a cabinet body and a heat dissipation assembly, the cabinet body is arranged on the ground, the heat dissipation assembly is arranged in the cabinet body and used for heat dissipation, the heat dissipation assembly comprises a heat dissipation shell, a draught fan and a closing plate, and the heat dissipation shell is arranged at the top end of the cabinet body; a first air inlet is formed in each side wall of the heat dissipation shell, the multiple sealing plates are rotationally matched in the heat dissipation shell, each sealing plate corresponds to the side wall of one heat dissipation shell, a control mechanism is arranged in the heat dissipation shell, and the control mechanism is used for driving the sealing plates to rotate; the sealing plates rotate to control opening and closing of the first air inlets in the side walls of the corresponding heat dissipation shells, second air inlets are formed in the top end of the cabinet body, and the draught fan is arranged on the top face of the cabinet body. According to the alternating-current low-voltage power distribution cabinet, the closing plate can rotate in windy and rainy days, so that the first air inlet in the windy direction is closed, and rainwater is prevented from obliquely entering the heat dissipation shell.

Description

Technical Field

[0001] The present invention relates to the technical field of distribution cabinets, and particularly to an AC low-voltage distribution cabinet. Background Art

[0002] A distribution cabinet (also known as a distribution board, switch cabinet or distribution box) is a core device in the power system for distributing electric energy, controlling circuits and protecting equipment. It is mostly used in households, commercial buildings, industrial factories and public facilities, and is a hub connecting the main power supply and terminal electrical equipment.

[0003] In related technologies, distribution cabinets usually have good heat dissipation performance to prevent the electronic components inside from being damaged due to overheating. Existing distribution cabinets usually have ventilation holes on their side walls. Through the ventilation holes, the hot air inside the distribution cabinet can be discharged outside the cabinet, and the cold air outside the cabinet can enter the cabinet. The heat generated during the operation of the electronic components is carried away through the circulating flow of the air current.

[0004] Chinese patent application with the authorization publication number CN118748358B discloses a distribution cabinet, which includes a cabinet body, a filter screen and a knocking structure. The first ventilation holes are opened on both opposite sides of the cabinet body. The filter screen covers the surface of the first ventilation holes. The knocking structure includes a knocking piece, a striking piece, a rotating shaft and blades. The rotating shaft is rotatably installed in the cabinet body, and the extending direction of the rotating shaft is the same as the extending direction of the first ventilation holes; the blades are installed on the rotating shaft and are located on the outer wall of the cabinet, the knocking piece is installed on the rotating shaft, and the striking piece is installed on the inner wall of the cabinet. The knocking piece is used to drive the striking piece to knock the filter screen.

[0005] The above patent conducts air flow exchange inside and outside the cabinet through the first ventilation holes on both sides of the cabinet body. By setting the knocking structure, when external wind force and air current blow through the blades, the blades will drive the rotating shaft to rotate; as the rotating shaft rotates, the position of the knocking piece can change and contact the striking piece, so that the striking piece is forced to knock the filter screen, thereby shaking off the dust accumulated on the filter screen, and further achieving the purpose of automatically cleaning the filter screen.

[0006] However, some distribution cabinets need to be installed in outdoor environments. When it is windy and rainy, the wind will cause the rain to fall obliquely, and there is a possibility that the rain will obliquely fall into the distribution cabinet through the ventilation holes on the side wall of the distribution cabinet. The direct entry of rainwater into the distribution cabinet may cause a short circuit of the electronic components inside the distribution cabinet, and further damage the electronic components. Summary of the Invention

[0007] The present invention provides an AC low-voltage distribution cabinet, aiming to solve the problem that rainwater directly enters the distribution cabinet through the ventilation holes in related technologies.

[0008] The AC low-voltage distribution cabinet of the present invention includes: a cabinet body and a heat dissipation component; The cabinet body is arranged on the ground, and the heat dissipation component is arranged inside the cabinet body for heat dissipation; The heat dissipation component includes a heat dissipation housing, a fan and a closing plate. The heat dissipation housing is arranged at the top of the cabinet body. A first air inlet is arranged on each side wall of the heat dissipation housing. A plurality of the closing plates are rotatably fitted inside the heat dissipation housing. Each closing plate corresponds to a side wall of the heat dissipation housing. A control mechanism is arranged inside the heat dissipation housing for driving the closing plate to rotate. The rotation of the closing plate can control the opening and closing of the first air inlet on the corresponding side wall of the heat dissipation housing. A second air inlet is arranged at the top of the cabinet body. The fan is arranged on the top surface of the cabinet body for pumping the air inside the heat dissipation housing into the cabinet body through the second air inlet.

[0009] Beneficial effects: Cold air enters the heat dissipation housing through the first air inlet, and the fan pumps the cold air inside the heat dissipation housing into the cabinet body, thereby cooling the inside of the cabinet body and preventing the temperature inside the cabinet body from being too high, which may cause damage to electrical components. When it is windy and rainy, under the action of the wind, the rainwater will fall obliquely along the direction of the air flow. By controlling the mechanism to rotate the closing plate corresponding to the direction of the air flow, the closing plate can close the first air inlet corresponding to the direction of the air flow, preventing the rainwater from obliquely entering the heat dissipation housing, and further preventing the rainwater from entering the cabinet body through the second air inlet, avoiding the rainwater from contacting the electrical components, and thus avoiding damage to the electrical components.

[0010] Preferably, the control mechanism includes a rainwater collection box, a wind baffle and a pull rope. The heat dissipation housing is provided with four first chutes extending in different horizontal directions. Each first chute corresponds to a closing plate. A wind baffle is slidably fitted at each first chute. The wind baffle can move along the corresponding first chute. The wind baffle is connected to the corresponding closing plate through the pull rope. The wind baffle can drive the closing plate to rotate through the pull rope. A rainwater collection box is slidably fitted at the port of each first chute. The rainwater collection box is connected to the heat dissipation housing through an elastic member. The rainwater collection box can shield the first chute.

[0011] The effect is that when it is windy and rainy, the rainwater gathers in the rainwater collection box. The gravity of the rainwater overcomes the elastic force of the elastic member and pushes the rainwater collection box to move downward, thereby exposing the wind baffle. The wind will push the wind baffle in the first chute whose port faces the wind direction, causing the wind baffle to move along the first chute. During the movement of the wind baffle, it pulls the closing plate corresponding to the wind direction through the pull rope, so that the closing plate rotates and closes the first air inlet corresponding to the wind direction.

[0012] Preferably, a waterproof block is further provided inside the heat dissipation housing. A plurality of waterproof blocks are continuously distributed along the circumference of the heat dissipation housing. Each waterproof block is parallel to one of the closing plates, and the plurality of waterproof blocks surround the circumference of the second air inlet.

[0013] The effect is that the waterproof blocks surround the circumference of the second air inlet, thereby forming an isolation ring around the second air inlet to prevent some rainwater from falling on the outer side of the top surface of the cabinet body and gradually spreading inwards to the second air inlet.

[0014] Preferably, an air inlet pipeline is provided inside the cabinet body. The air inlet pipe includes a first air inlet pipe and a second air inlet pipe. The first air inlet pipe is vertically distributed. The top end of the first air inlet pipe is communicated with the fan. The bottom end of the first air inlet pipe is communicated with the second air inlet pipe. The second air inlet pipe is horizontally distributed, and a plurality of third air inlets are provided on the second air inlet pipe at intervals.

[0015] The effect is that the fan draws the cold air inside the heat dissipation housing towards the first air inlet pipe. The cold air moves downwards along the first air inlet pipe and is discharged from the second air inlets on the second air inlet pipe. The discharged cold air blows upwards. This process increases the contact time between the cold air and the hot air inside the cabinet body, can improve the heat exchange efficiency, and thus takes more heat away from the inside of the cabinet body.

[0016] Preferably, an air outlet pipeline is further provided on the top of the cabinet body. The air outlet pipeline includes a first air outlet pipe and a second air outlet pipe. The first air outlet pipe is horizontally arranged and fixedly connected to the top surface of the cabinet body. The second air outlet pipe is horizontally arranged. The second air outlet pipe is located below the first air outlet pipe. The first air outlet pipe and the second air outlet pipe are vertically distributed. First air outlets are provided on the side walls of the first air outlet pipe and the second air outlet pipe. Second air outlets are provided at both ends of the first air outlet pipe and the second air outlet pipe. The second air outlets are communicated with the outside.

[0017] Preferably, both ends of the first air outlet pipe and the second air outlet pipe are communicated with the bottom surface of the heat dissipation housing, and a first ventilation opening and a second ventilation opening are formed. The first ventilation opening and the second ventilation opening are respectively located between the side wall of the heat dissipation housing and the corresponding closing plate. The closing plate can close the first ventilation opening or the second ventilation opening.

[0018] When it is windy and rainy, the closing plate rotates upwards, thereby exposing the first ventilation opening or the second ventilation opening. Cold air and rainwater can enter the first air outlet pipe or the second air outlet pipe through the first ventilation opening or the second ventilation opening, thereby reducing the temperature of the first air outlet pipe or the second air outlet pipe, and further reducing the temperature inside the cabinet body.

[0019] Preferably, a closing mechanism is provided in the first air outlet pipe and the second air outlet pipe. The closing mechanism includes a first arc-shaped plate, a stopper, and a turbine. The first arc-shaped plate is provided at the first air outlet or the second air outlet and is slidably engaged with the first air outlet pipe or the second air outlet pipe. The stopper is slidably engaged with the first arc-shaped plate and is elastically connected to the first arc-shaped plate. The stopper can be received into the first arc-shaped plate. The turbine is rotatably engaged in the first air outlet pipe and / or the second air outlet pipe. The turbine can abut against the stopper, and the rotation of the turbine can push the first arc-shaped plate to move.

[0020] Preferably, a second arc-shaped plate is provided beside the turbine. The second arc-shaped plate can partially shield the turbine, thereby reducing the wind force required to drive the turbine to rotate.

[0021] Preferably, the top of the heat dissipation housing is frustum-shaped, and rainwater can slide down obliquely along the top surface of the heat dissipation housing.

[0022] Preferably, a movable door is rotatably engaged on the cabinet body, and a handle is provided on the movable door.

[0023] By adopting the above technical solutions, the beneficial effects of the present invention are as follows: According to the AC low-voltage power distribution cabinet of the present invention, cold air enters the heat dissipation housing through the first air inlet. The fan draws the cold air in the heat dissipation housing into the cabinet body to cool the inside of the cabinet body, preventing the temperature inside the cabinet body from being too high and causing damage to electrical components. When it is windy and rainy, under the action of the wind, rainwater will fall obliquely along the direction of the airflow. By controlling the rotation of the closing plate corresponding to the direction of the airflow, the closing plate can close the first air inlet corresponding to the direction of the airflow, preventing rainwater from obliquely entering the heat dissipation housing, and further preventing rainwater from entering the cabinet body through the second air inlet, avoiding rainwater contacting the electrical components, and thus avoiding damage to the electrical components. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic structural diagram of the AC low-voltage power distribution cabinet according to an embodiment of the present invention.

[0025] Figure 2 is a cross-sectional view of the AC low-voltage power distribution cabinet according to an embodiment of the present invention.

[0026] Figure 3 is a cross-sectional view of the heat dissipation component in another state according to an embodiment of the present invention.

[0027] Figure 4 is a cross-sectional view of the heat dissipation housing according to an embodiment of the present invention.

[0028] Figure 5 is a schematic structural diagram of the control mechanism according to an embodiment of the present invention.

[0029] Figure 6 It is the distribution diagram of the positions of the waterproof blocks in the embodiments of the present invention.

[0030] Figure 7 It is the upward view sectional view of the AC low-voltage power distribution cabinet in the embodiments of the present invention.

[0031] Figure 8 It is the schematic diagram of the position of the second ventilation opening in the embodiments of the present invention.

[0032] Figure 9 It is the sectional view of the second air outlet pipe in the embodiments of the present invention.

[0033] Figure 10 It is the schematic diagram of the structure of the first arc-shaped plate in the embodiments of the present invention.

[0034] Reference numerals: 1, cabinet body; 101, movable door; 102, second air inlet; 21, heat dissipation housing; 211, first air inlet; 22, fan; 23, closing plate; 241, rainwater collection box; 242, wind baffle; 243, pull rope; 244, first sliding groove; 3, waterproof block; 41, first air inlet pipe; 42, second air inlet pipe; 43, third air inlet; 51, first air outlet pipe; 52, second air outlet pipe; 521, second ventilation opening; 53, first air outlet; 54, second air outlet; 61, first arc-shaped plate; 62, stop block; 63, turbine; 64, second arc-shaped plate. Detailed implementation manners

[0035] The embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the drawings. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention.

[0036] As Figures 1 to 10 shown, the AC low-voltage power distribution cabinet of the present invention includes: a cabinet body 1 and a heat dissipation assembly. The cabinet body 1 is supported on the ground, and various electrical components can be placed inside it. The heat dissipation assembly is used to introduce cold air into the cabinet body 1 and discharge the hot air in the cabinet body 1 from the cabinet body 1 to prevent the electrical components in the cabinet body 1 from being damaged due to excessive temperature.

[0037] Specifically, as Figure 1 shown, the cabinet body 1 is of a cuboid structure. A movable door 101 is rotatably fitted on the front side of the cabinet body 1. A handle is provided on the movable door 101. By manually pulling the handle, the movable door 101 can be pulled open. The provision of the movable door 101 facilitates the staff to open the cabinet body 1, so that the electrical components in the cabinet body 1 can be repaired.

[0038] As Figure 1 , Figure 2 and Figure 6As shown, the heat dissipation component includes a heat dissipation housing 21, a fan 22, and a closing plate 23. The heat dissipation housing 21 is fixedly arranged on the top of the cabinet body 1. The top of the heat dissipation housing 21 is frustum-shaped. The side walls of the heat dissipation housing 21 in the front, rear, left, and right directions are all inclined, and a plurality of first air inlets 211 are arranged at intervals on the four side walls. A second air inlet 102 is arranged on the top surface of the cabinet body 1. The fan 22 is an exhaust fan 22 in the conventional technology. The fan 22 is fixedly arranged on the top surface of the cabinet body 1. The air inlet of the fan 22 is communicated with the second air inlet 102. The cabinet body 1 is also provided with an air inlet pipeline, and the air inlet pipeline includes a first air inlet pipe 41 and a second air inlet pipe 42. The first air inlet pipe 41 is vertically distributed, and the top end of the first air inlet pipe 41 is communicated with the air outlet of the fan 22. The second air inlet pipe 42 is horizontally distributed and is communicated with the bottom end of the first air inlet pipe 41. A plurality of third air inlets 43 are arranged at intervals along the axial direction on the side wall of the second air inlet pipe 42. Cold air enters the heat dissipation housing 21 from the first air inlets 211. The fan 22 sucks the cold air in the heat dissipation housing 21 into the first air inlet pipe 41 and the second air inlet pipe 42, and enters the interior of the cabinet body 1 from the third air inlets 43.

[0039] As Figures 2 to 6 As shown, there are four closing plates 23. The four closing plates 23 are all located inside the heat dissipation housing 21. Each closing plate 23 corresponds to a side wall of the heat dissipation housing 21. The four closing plates 23 are all rotationally matched with the top surface of the cabinet body 1 through torsion springs. A control mechanism is arranged on the heat dissipation housing 21. The control mechanism includes a rainwater collection box 241, a wind deflector 242, and a pull rope 243. Four first sliding grooves 244 are arranged on the heat dissipation housing 21. The four first sliding grooves 244 are horizontally distributed and extend along the front, rear, left, and right directions respectively. A wind deflector 242 is arranged in each first sliding groove 244. The side wall of the wind deflector 242 fits with the inner wall of the first sliding groove 244. The wind deflector 242 is slidably matched with the first sliding groove 244 and can slide along the first arc groove. A rainwater collection box 241 is arranged at the port of each first sliding groove 244. The rainwater collection box 241 is slidably matched with the closed housing. A guiding groove is arranged beside the rainwater collection box 241 on the closed housing. The rainwater collection box 241 extends into the guiding groove and is elastically connected with the heat dissipation housing 21 through an elastic member. The elastic member is an elastic column. The rainwater collection box 241 can move up and down relative to the heat dissipation housing 21. One end of the pull rope 243 is fixedly connected with the wind deflector 242, and the other end is fixedly connected with the closing plate 23 corresponding to the port of the first sliding groove 244. For example, if the port of the first sliding groove 244 faces left, the closing plate 23 in the first sliding groove 244 is connected to the closing plate 23 on the left side of the heat dissipation housing 21 through the pull rope 243. Four waterproof blocks 3 are also arranged inside the heat dissipation housing 21. The four waterproof blocks 3 are all located inside the four closing plates 23, and the adjacent waterproof blocks 3 are in contact with each other to form a cube frame structure. The second air inlet 102 is located at the center of the four waterproof blocks 3.

[0040] In the initial state, the closing plate 23 is in contact with the top surface of the cabinet body 1. When it rains, rainwater can be collected in the rainwater collection box 241. The gravity of the rainwater overcomes the elastic force of the elastic member to push the rainwater collection box 241 to move downward, and the wind shield 242 is exposed. If there is also a windy phenomenon when it rains, the wind force will push the wind shield 242 corresponding to the wind direction to move along the first chute 244. The wind shield 242 pulls the closing plate 23 to rotate through the pull rope 243, and the torsion spring stores energy. The closing plate 23 rotates to be able to close the corresponding first ventilation opening, so as to prevent rainwater from tilting into the heat dissipation housing 21.

[0041] As Figures 7 to 9 shown, an air outlet pipeline is also provided at the top of the cabinet body 1. The air outlet pipeline includes a first air outlet pipe 51 and a second air outlet pipe 52. There are two first air outlet pipes 51, and the two first air outlet pipes 51 are horizontally spaced apart and both extend in the front-rear direction. There are two second air outlet pipes 52, and the two second air outlet pipes 52 are horizontally spaced apart and both extend in the left-right direction. The two second air outlet pipes 52 are both located below the two first air outlet pipes 51 and are vertically distributed with the first air outlet pipes 51. The two first air outlet pipes 51 and the two second air outlet pipes 52 form a cross-shaped structure. A plurality of first air outlet openings 53 are provided on the side walls of each first air outlet pipe 51 and the second air outlet pipe 52. A one-way valve is provided at each first air outlet opening 53, and the one-way valve is provided to make the first air outlet opening 53 conduct unidirectionally, and the air flow can only enter the first air outlet pipe 51 or the second air outlet pipe 52 from the inside of the cabinet body 1 through the first air outlet opening 53. Both ends of each first air outlet pipe 51 are fixedly connected to the top surface of the cabinet body 1, and a first ventilation opening is formed at the connection between it and the top surface of the cabinet body 1. The first ventilation opening is located between the closing plate 23 and the side wall of the heat dissipation housing 21. When the closing plate 23 is in contact with the top surface of the cabinet body 1, the closing plate 23 can close the corresponding first ventilation opening. Both ends of each second air outlet pipe 52 are fixedly connected to the top surface of the cabinet body 1, and a second ventilation opening 521 is formed at the connection between it and the top surface of the cabinet body 1. The second ventilation opening 521 is located between the closing plate 23 and the side wall of the heat dissipation housing 21. When the closing plate 23 is in contact with the top surface of the cabinet body 1, the closing plate 23 can close the corresponding second ventilation opening 521. Second air outlet openings 54 are provided at both ends of each first air outlet pipe 51 and the second air outlet pipe 52, and the second air outlet openings 54 pass through the side wall of the cabinet body 1 and communicate with the outside.

[0042] As Figure 9 and Figure 10As shown in the figure, a closing mechanism is provided in each of the first air outlet pipe 51 and the second air outlet pipe 52, and a closing mechanism is provided at each second air outlet 54. The closing mechanism includes a first arc-shaped plate 61, a stop block 62 and a turbine 63. The first arc-shaped plate 61 is arranged at the second air outlet 54 and is slidably matched with the inner wall of the first air outlet pipe 51 or the inner wall of the second air outlet pipe 52. The turbine 63 is located beside the first arc-shaped plate 61 and is rotatably matched with the inner wall of the first air outlet pipe 51 or the inner wall of the second air outlet pipe 52. A stop block 62 is provided on the first arc-shaped plate 61. The stop block 62 is slidably matched with the first arc-shaped plate 61. The stop block 62 is elastically connected to the first arc-shaped plate 61 through a spring. The stop block 62 can be received into the first arc-shaped plate 61. When the turbine 63 rotates, the blades on the turbine 63 can abut against the stop block 62 and push the first arc-shaped plate 61 to rotate through the stop block 62. A second arc-shaped plate 64 is also provided beside the turbine 63. The second arc-shaped plate 64 is fixedly connected to the inner wall of the first air outlet pipe 51 or the inner wall of the second air outlet pipe 52. The second arc-shaped plate 64 and the turbine 63 are distributed at intervals. A ventilation duct is formed between the second arc-shaped plate 64 and the inner wall of the first air outlet pipe 51 or the inner wall of the second air outlet pipe 52. When the air flow passes through the ventilation duct, the air flow can push the turbine 63 to rotate.

[0043] The implementation principle of the AC low-voltage power distribution cabinet according to the embodiment of the present invention is as follows: In the normal state, external cold air enters the heat dissipation housing 21 from the first air inlet 211. The fan 22 sucks the cold air in the heat dissipation housing 21 towards the first air inlet pipe 41 and enters the second air inlet pipe 42 along the first air inlet pipe 41, and then enters the cabinet body 1 from the third air inlet 43, so as to realize the upward flow of cold air from bottom to top. During the air flow process, the heat generated by the electrical components in the cabinet body 1 will be carried away. The hot air carrying the heat flows to the top of the cabinet body 1 and enters the first air outlet pipe 51 and the second air outlet pipe 52 through the first air outlet 53, and then is discharged from the cabinet body 1 through the second air outlet 54.

[0044] When it rains, the rainwater will wash the side wall of the inclined heat dissipation housing 21, thereby cleaning the side wall of the heat dissipation housing 21 to prevent it from being blocked. Part of the rainwater will slide obliquely along the side wall of the heat dissipation housing 21, and the other part of the rainwater will enter the heat dissipation housing 21 and fall between the side wall of the heat dissipation housing 21 and the waterproof block 3. Since the waterproof block 3 is provided on the periphery of the second air inlet 102, the waterproof block 3 can block the water flow from entering the second air inlet 102. The rainwater entering the heat dissipation housing 21 will flow outwards and be discharged from the first air inlet 211 at the bottom of the side wall of the heat dissipation housing 21.

[0045] If it is raining and there is also a windy phenomenon, the rainwater will collect in the rainwater collection box 241 during rain. The gravity of the rainwater will overcome the elastic force of the elastic member and push the rainwater collection box 241 downward, thereby exposing the wind shield 242. The wind force will push the corresponding wind shield 242 to move. For example, when the external air flow moves from front to back, the wind force can push the wind shield 242 in the first chute 244 with the port facing forward to move backward. The backward movement of the wind shield 242 will pull the closing plate 23 located on the front side of the heat dissipation housing 21 through the pull rope 243, causing the closing plate 23 to move upward against the elastic force of the torsion spring, so as to close the front side of the heat dissipation housing 21, prevent the rainwater from tilting into the heat dissipation housing 21, and cross the waterproof block 3 and enter the second air inlet 102. When the closing plate 23 rotates upward, the first ventilation opening located on the front side of the heat dissipation housing 21 will be exposed. The cold air will carry the rainwater into the first air outlet pipe from the first ventilation opening, and move from the front end of the first air outlet pipe to the rear end of the first air outlet pipe. During this process, the air flow will push the two turbines 63 in the first air outlet pipe to rotate, causing the turbine 63 located on the front side to rotate counterclockwise, and the turbine 63 located on the rear side to rotate clockwise. The turbine 63 on the front side rotates counterclockwise, so as to push the corresponding first arc plate 61 to rotate counterclockwise through the stopper 62, so that the first arc plate 61 can close the second air outlet 54 on the front side of the first air outlet pipe. The turbine 63 on the rear side rotates clockwise, so as to push the corresponding first arc plate 61 to rotate clockwise through the stopper 62, keeping the second ventilation opening 521 on the rear side in an open state, avoiding the cold air and rainwater entering the first air outlet pipe 51 from the front first ventilation opening from directly discharging from the second air outlet 54 on the front side. The cold air and rainwater move along the first air outlet pipe 51 and discharge from the second air outlet 54 on the rear side. When the cold air and rainwater move in the first air outlet pipe 51, the temperature of the first air outlet pipe 51 can be reduced, thereby reducing the temperature inside the cabinet 1 and further preventing the temperature inside the cabinet 1 from being too high.

[0046] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. An AC low-voltage power distribution cabinet, comprising: Cabinet and heat dissipation component; The cabinet is arranged on the ground, and the heat dissipation component is arranged in the cabinet for heat dissipation; It is characterized in that the heat dissipation component includes a heat dissipation housing, a fan and a closing plate. The heat dissipation housing is arranged at the top of the cabinet. A first air inlet is provided on each side wall of the heat dissipation housing. A plurality of the closing plates are rotatably fitted in the heat dissipation housing. Each closing plate corresponds to a side wall of the heat dissipation housing. A control mechanism is arranged in the heat dissipation housing. The control mechanism is used to drive the closing plate to rotate. The rotation of the closing plate can control the opening and closing of the first air inlet on the corresponding side wall of the heat dissipation housing. A second air inlet is provided at the top of the cabinet. The fan is arranged on the top surface of the cabinet and is used to draw the air in the heat dissipation housing into the cabinet interior through the second air inlet.

2. The AC low-voltage power distribution cabinet according to claim 1, wherein The control mechanism includes a rainwater collection box, a wind shield and a pull rope. The heat dissipation housing is provided with four first chutes extending in different horizontal directions. Each first chute corresponds to a closing plate. A wind shield is slidably fitted at each first chute. The wind shield can move along the corresponding first chute. The wind shield is connected to the corresponding closing plate through the pull rope. The wind shield can drive the closing plate to rotate through the pull rope. A rainwater collection box is slidably fitted at the port of each first chute. The rainwater collection box is connected to the heat dissipation housing through an elastic member. The rainwater collection box can shield the first chute.

3. The AC low-voltage power distribution cabinet according to claim 2, characterized in that, A waterproof block is further arranged in the heat dissipation housing. A plurality of waterproof blocks are continuously distributed along the circumference of the heat dissipation housing. Each waterproof block is parallel to a closing plate. The plurality of waterproof blocks surround the circumference of the second air inlet.

4. The AC low-voltage power distribution cabinet according to claim 1, wherein, An air inlet pipeline is arranged in the cabinet. The air inlet pipe includes a first air inlet pipe and a second air inlet pipe. The first air inlet pipe is vertically distributed. The top end of the first air inlet pipe is communicated with the fan. The bottom end of the first air inlet pipe is communicated with the second air inlet pipe. The second air inlet pipe is horizontally distributed. A plurality of third air inlets are provided at intervals on the second air inlet pipe.

5. The AC low-voltage power distribution cabinet according to claim 4, wherein An air outlet pipeline is further arranged at the top of the cabinet. The air outlet pipeline includes a first air outlet pipe and a second air outlet pipe. The first air outlet pipe is horizontally arranged and fixedly connected to the top surface of the cabinet. The second air outlet pipe is horizontally arranged. The second air outlet pipe is located below the first air outlet pipe. The first air outlet pipe and the second air outlet pipe are vertically distributed. First air outlets are provided on the side walls of the first air outlet pipe and the second air outlet pipe. Second air outlets are provided at both ends of the first air outlet pipe and the second air outlet pipe. The second air outlets are communicated with the outside.

6. The AC low-voltage power distribution cabinet according to claim 5, characterized in that, Both ends of the first air outlet pipe and the second air outlet pipe are communicated with the bottom surface of the heat dissipation housing respectively, and a first ventilation opening and a second ventilation opening are formed. The first ventilation opening and the second ventilation opening are respectively located between the side wall of the heat dissipation housing and the corresponding closing plate. The closing plate can close the first ventilation opening or the second ventilation opening.

7. The AC low-voltage power distribution cabinet according to claim 6, wherein, A closing mechanism is provided in both the first air outlet pipe and the second air outlet pipe. The closing mechanism includes a first arc-shaped plate, a stopper, and a turbine. The first arc-shaped plate is provided at the first air outlet or the second air outlet, and is slidably engaged with the first air outlet pipe or the second air outlet pipe. The stopper is slidably engaged with the first arc-shaped plate and is elastically connected to the first arc-shaped plate. The stopper can be received into the first arc-shaped plate. The turbine is rotatably engaged in the first air outlet pipe and / or the second air outlet pipe. The turbine can abut against the stopper, and the rotation of the turbine can push the first arc-shaped plate to move.

8. The AC low-voltage power distribution cabinet according to claim 7, characterized in that, A second arc-shaped plate is provided beside the turbine. The second arc-shaped plate can partially shield the turbine, thereby reducing the wind force required to drive the turbine to rotate.

9. The AC low-voltage power distribution cabinet according to claim 1, characterized in that, The top of the heat dissipation housing is frustum-shaped, and rainwater can slide down obliquely along the top surface of the heat dissipation housing.

10. The AC low-voltage power distribution cabinet according to claim 1, wherein, A movable door is rotatably engaged on the cabinet body, and a handle is provided on the movable door.

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