AC low-voltage distribution cabinet

Abstract

The present invention relates to the technical field of power distribution cabinets, and specifically discloses an AC low-voltage power distribution cabinet, comprising: a cabinet body and a heat dissipation component, the cabinet body is arranged on the ground, the heat dissipation component is arranged in the cabinet body, and is used for heat dissipation, the heat dissipation component comprises a heat dissipation shell, a fan and a closing plate, the heat dissipation shell is arranged at the top of the cabinet body, each side wall of the heat dissipation shell is provided with a first air inlet, a plurality of closing plates are rotatably fitted in the heat dissipation shell, each closing plate corresponds to a side wall of the heat dissipation shell, a control mechanism is provided in the heat dissipation shell, the control mechanism is used to drive the closing plate to rotate, and 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 shell, a second air inlet is provided at the top of the cabinet body, and the fan is arranged on the top surface of the cabinet body; the AC low-voltage power distribution cabinet of the present invention can rotate the closing plate when it is windy or rainy, thereby closing the first air inlet in the windy direction, and preventing rainwater from obliquely entering the heat dissipation shell.

Description

Technical Field

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

[0002] A distribution cabinet (also known as a distribution panel, switchgear, or distribution box) is a core device in a power system used to distribute electrical energy, control circuits, and protect equipment. It is mostly used in homes, commercial buildings, industrial plants, and public facilities, and serves as the hub connecting the main power supply and terminal electrical equipment.

[0003] In the related art, the distribution cabinet usually has good heat dissipation performance, thereby preventing the electronic devices inside it from being damaged due to overheating. The existing distribution cabinet usually has vents on its side walls. The vents can allow the hot air inside the distribution cabinet to be discharged outside the distribution cabinet and the cold air outside the distribution cabinet to enter the distribution cabinet, and the heat generated by the electronic devices during operation can be removed through the circulation of air.

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

[0005] The above patent exchanges airflow inside and outside the cabinet through the first air vents on both sides of the cabinet. By setting a knocking structure, when external wind and airflow blow through the blades, the blades will drive the rotating shaft to rotate; and as the rotating shaft rotates, the position of the knocking member can change and contact the knocking member, so that the knocking member is forced to knock the filter, thereby shaking off the accumulated dust on the filter, thereby achieving the purpose of automatically cleaning the filter.

[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. There is a possibility that the rain will fall into the distribution cabinet through the ventilation holes on the side wall of the distribution cabinet. Rainwater directly entering the distribution cabinet may cause the electronic devices in the distribution cabinet to short-circuit, thereby damaging the electronic devices. Summary of the Invention

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

[0008] The AC low-voltage power distribution cabinet of the present invention comprises: a cabinet body and a heat dissipation component;

[0009] The cabinet is arranged on the ground, and the heat dissipation component is arranged in the cabinet for dissipating heat;

[0010] The heat dissipation assembly includes a heat dissipation shell, a fan and a closing plate. The heat dissipation shell is arranged at the top of the cabinet. A first air inlet is provided on each side wall of the heat dissipation shell. Multiple closing plates are rotatably fitted in the heat dissipation shell. Each closing plate corresponds to a side wall of the heat dissipation shell. A control mechanism is provided in the heat dissipation shell. 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 shell. 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 air in the heat dissipation shell to the inside of the cabinet through the second air inlet.

[0011] Beneficial effect: cold air enters the heat dissipation casing through the first air inlet, and the fan draws the cold air in the heat dissipation casing into the cabinet, thereby cooling the inside of the cabinet and preventing the temperature inside the cabinet from being too high, which may cause damage to electrical components. When it is windy and rainy, rainwater will fall tiltedly along the direction of airflow under the action of wind. The closing plate corresponding to the direction of airflow is rotated by the control mechanism, so that the closing plate can close the first air inlet corresponding to the direction of airflow, preventing rainwater from tilting into the heat dissipation casing, and then preventing rainwater from entering the cabinet from the second air inlet, preventing rainwater from contacting electrical components, and thus preventing damage to electrical components.

[0012] Preferably, the control mechanism includes a rainwater collecting box, a windshield and a pull rope, the heat dissipation shell is provided with four first slide grooves extending in different directions along the horizontal plane, each of the first slide grooves corresponds to a closing plate, and each of the first slide grooves is slidably fitted with a windshield, the windshield can move along the corresponding first slide groove, the windshield is connected to the corresponding closing plate through the pull rope, the windshield can drive the closing plate to rotate through the pull rope, and each of the first slide grooves has a rainwater collecting box slidably fitted at its port, the rainwater collecting box is connected to the heat dissipation shell through an elastic member, and the rainwater collecting box can cover the first slide groove.

[0013] The effect is that when it is windy and rainy, rainwater collects in the rainwater collecting box, and the gravity of the rainwater overcomes the elastic force of the elastic part and pushes the rainwater collecting box downward, thereby exposing the wind shield, and the wind force will push the port toward the wind shield in the first slide groove corresponding to the wind direction, so that the wind shield moves along the first slide groove. During the movement, the wind shield 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 force.

[0014] Preferably, a waterproof block is further provided in the heat dissipation housing, and a plurality of waterproof blocks are continuously distributed along the circumference of the heat dissipation housing, each of the waterproof blocks is distributed parallel to one of the closing plates, and a plurality of the waterproof blocks surround the circumference of the second air inlet.

[0015] The effect is that the waterproof block surrounds the second air inlet, thereby forming an isolation ring around the second air inlet, preventing some rainwater from falling on the outside of the top surface of the cabinet and gradually spreading inward to the second air inlet.

[0016] Preferably, an air inlet duct is provided in the cabinet, and the air inlet duct includes a first air inlet duct and a second air inlet duct, the first air inlet duct is distributed vertically, the top end of the first air inlet duct is connected to the fan, the bottom end of the first air inlet duct is connected to the second air inlet duct, the second air inlet duct is distributed horizontally, and the second air inlet duct is provided with a plurality of third air inlets distributed at intervals.

[0017] The effect is that the fan draws the cold air in the heat dissipation casing to the first air inlet duct, the cold air moves downward along the first air inlet duct, and is discharged from the second air inlet on the second air inlet duct. The discharged cold air is blown upward. This process increases the contact time between the cold air and the hot air in the cabinet, which can improve the heat exchange efficiency and thus take more heat away from the inside of the cabinet.

[0018] Preferably, an air outlet duct is also provided on the top of the cabinet, and the air outlet duct includes a first air outlet duct and a second air outlet duct. The first air outlet duct is horizontally arranged and fixedly connected to the top surface of the cabinet, and the second air outlet duct is horizontally arranged. The second air outlet duct is located below the first air outlet duct, and the first air outlet duct and the second air outlet duct are vertically distributed. A first air outlet is provided on the side wall of the first air outlet duct and the second air outlet duct, and a second air outlet is provided at both ends of the first air outlet duct and the second air outlet duct, and the second air outlet is connected to the outside world.

[0019] Preferably, both ends of the first air outlet duct and the second air outlet duct are respectively connected to the bottom surface of the heat dissipation shell, and form a first vent and a second vent, and the first vent and the second vent are respectively located between the side wall of the heat dissipation shell and the corresponding closing plate, and the closing plate can close the first vent or the second vent.

[0020] When it is windy or rainy, the closing plate rotates upward to expose the first vent or the second vent, and cold air and rainwater can enter the first air outlet duct or the second air outlet duct through the first vent or the second vent, thereby lowering the temperature of the first air outlet duct or the second air outlet duct, and then lowering the temperature inside the cabinet.

[0021] Preferably, the first air outlet duct and the second air outlet duct are both provided with a closing mechanism, and the closing mechanism includes a first curved plate, a block and a turbine. The first curved plate is provided at the first air outlet or the second air outlet, and slides with the first air outlet duct or the second air outlet duct. The block slides on the first curved plate and is elastically connected to the first curved plate. The block can be retracted into the first curved plate, and the turbine rotates and fits in the first air outlet duct and / or the second air outlet duct. The turbine can stop with the block, and the rotation of the turbine can push the first curved plate to move.

[0022] Preferably, a second curved plate is provided next to the turbine, and the second curved plate can partially shield the turbine, thereby reducing the wind force required to drive the turbine to rotate.

[0023] Preferably, the top of the heat dissipation housing is in a truncated cone shape, and rainwater can slide down along the top surface of the heat dissipation housing.

[0024] Preferably, the cabinet body is rotatably provided with a movable door, and the movable door is provided with a handle.

[0025] By adopting the above technical solution, the beneficial effects of the present invention are:

[0026] According to the AC low-voltage distribution cabinet of the present invention, cold air enters the heat dissipation casing through the first air inlet, and the fan draws the cold air in the heat dissipation casing into the interior of the cabinet, thereby cooling the interior of the cabinet to prevent the temperature inside the cabinet from being too high, which may cause damage to electrical components. When it is windy and rainy, rainwater will fall obliquely along the direction of airflow under the action of wind. The closing plate corresponding to the direction of airflow is rotated by the control mechanism, so that the closing plate can close the first air inlet corresponding to the direction of airflow, preventing rainwater from obliquely entering the heat dissipation casing, and further preventing rainwater from entering the cabinet from the second air inlet, preventing rainwater from contacting electrical components, and thus preventing damage to electrical components. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural diagram of an AC low-voltage distribution cabinet according to an embodiment of the present invention.

[0028] Figure 2 It is a cross-sectional view of an AC low-voltage distribution cabinet according to an embodiment of the present invention.

[0029] Figure 3 is a cross-sectional view of the heat dissipation assembly according to an embodiment of the present invention in another state.

[0030] Figure 4 4 is a cross-sectional view of a heat dissipation housing according to an embodiment of the present invention.

[0031] Figure 5Schematic diagram of the control mechanism of an embodiment of the present invention.

[0032] Figure 6 This is a diagram showing the location distribution of waterproof blocks according to an embodiment of the present invention.

[0033] Figure 7 It is a bottom sectional view of an AC low-voltage distribution cabinet according to an embodiment of the present invention.

[0034] Figure 8 Schematic diagram of the position of the second vent in an embodiment of the present invention.

[0035] Figure 9 It is a cross-sectional view of the second air outlet duct according to an embodiment of the present invention.

[0036] Figure 10 2 is a schematic diagram of the first curved plate structure of an embodiment of the present invention.

[0037] Reference numerals:

[0038] 1. Cabinet; 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 shield; 243. Pull rope; 244. First slide; 3. Waterproof block; 41. First air inlet duct; 42. Second air inlet duct; 43. Third air inlet; 51. First air outlet duct; 52. Second air outlet duct; 521. Second vent; 53. First air outlet; 54. Second air outlet; 61. First curved plate; 62. Block; 63. Turbine; 64. Second curved plate. DETAILED DESCRIPTION

[0039] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0040] like Figures 1 to 10 As shown, the AC low-voltage 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 out of the cabinet body 1 to prevent the electrical components from being damaged due to excessive temperature in the cabinet body 1.

[0041] Specifically, if Figure 1 As shown, the cabinet 1 is a rectangular structure, and the front side of the cabinet 1 is rotated to cooperate with a movable door 101. The movable door 101 is provided with a handle. The movable door 101 can be opened by manually pulling the handle. The movable door 101 is provided to facilitate the staff to open the cabinet 1 so that the electrical components in the cabinet 1 can be inspected.

[0042] like Figure 1 、 Figure 2 and Figure 6 As shown, the heat dissipation assembly includes a heat dissipation shell 21, a fan 22 and a closing plate 23. The heat dissipation shell 21 is fixedly arranged on the top of the cabinet 1. The top of the heat dissipation shell 21 is in a truncated cone shape. The side walls of the heat dissipation shell 21 in the front, rear, left and right directions are all inclined, and a plurality of first air inlets 211 distributed at intervals are provided on the four side walls. A second air inlet 102 is provided on the top surface of the cabinet 1. The fan 22 is an exhaust fan 22 in conventional technology. The fan 22 is fixedly arranged on the top surface of the cabinet 1. The air inlet of the fan 22 is connected to the second air inlet 102. The cabinet 1 is also provided with an air inlet. Pipeline, the air inlet pipe includes a first air inlet pipe 41 and a second air inlet pipe 42. The first air inlet pipe 41 is distributed vertically, and the top of the first air inlet pipe 41 is connected to the air outlet of the fan 22. The second air inlet pipe 42 is distributed horizontally and is connected to the bottom end of the first air inlet pipe 41. A plurality of third air inlets 43 are provided on the side wall of the second air inlet pipe 42, which are distributed along its axial direction. The cold air enters the heat dissipation shell 21 from the first air inlet 211, and the fan 22 draws the cold air in the heat dissipation shell 21 into the first air inlet pipe 41 and the second air inlet pipe 42, and enters the interior of the cabinet 1 from the third air inlet 43.

[0043] like Figures 2 to 6As shown, there are four closing plates 23, and the four closing plates 23 are all located in the heat dissipation shell 21. Each closing plate 23 corresponds to a side wall of the heat dissipation shell 21. The four closing plates 23 are all rotated with the top surface of the cabinet 1 through a torsion spring. A control mechanism is provided on the heat dissipation shell 21. The control mechanism includes a rainwater collection box 241, a windshield 242 and a pull rope 243. Four first slide grooves 244 are provided on the heat dissipation shell 21. The four first slide grooves 244 are horizontally distributed and extend in four directions: front, back, left and right. A windshield 242 is provided in each first slide groove 244. The side wall of the windshield 242 fits with the inner wall of the first slide groove 244. The windshield 242 slides with the first slide groove 244 and can slide along the first arc groove. The first chute 244 is provided with a rainwater collection box 241 at the end thereof. The rainwater collection box 241 slides with the closed housing. The closed housing is provided with a guide groove next to the rainwater collection box 241. The rainwater collection box 241 extends into the guide groove and is elastically connected to the heat dissipation housing 21 via an elastic member, which 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 to the windshield 242, and the other end is fixedly connected to the closed plate 23 corresponding to the end of the first chute 244. For example, if the end of the first chute 244 faces left, the closed plate 23 in the first chute 244 is connected to the closed plate 23 on the left side of the heat dissipation housing 21 via the pull rope 243. Four waterproof blocks 3 are also provided in the heat dissipation housing 21. The four waterproof blocks 3 are all located on the inner sides of the four closed plates 23. Adjacent waterproof blocks 3 fit together to form a cube frame structure. The second air inlet 102 is located at the center of the four waterproof blocks 3.

[0044] In the initial state, the closing plate 23 fits with the top surface of the cabinet 1. When it rains, rainwater can collect in the rainwater collecting box 241. The gravity of the rainwater overcomes the elastic force of the elastic part to push the rainwater collecting box 241 downward, and expose the wind shield 242. If it is accompanied by wind when it rains, the wind will push the wind shield 242 of the corresponding wind direction to move along the first slide groove 244. The wind shield 242 pulls the closing plate 23 to rotate through the pull rope 243, and the torsion spring accumulates force. The closing plate 23 rotates to close the corresponding first vent, thereby preventing rainwater from tilting into the heat dissipation shell 21.

[0045] like Figures 7 to 9As shown, an air outlet duct is also provided at the top of the cabinet 1, and the air outlet duct includes a first air outlet duct 51 and a second air outlet duct 52. There are two first air outlet ducts 51, and the two first air outlet ducts 51 are horizontally spaced and extended in the front-to-back direction. There are two second air outlet ducts 52, and the two second air outlet ducts 52 are horizontally spaced and extended in the left-to-right direction. The two second air outlet ducts 52 are both located below the two first air outlet ducts 51 and are vertically distributed with the first air outlet ducts 51. The two first air outlet ducts 51 and the two second air outlet ducts 52 form a well-shaped structure. A plurality of first air outlets 53 are provided on the side walls of each of the first air outlet duct 51 and the second air outlet duct 52, and a one-way valve is provided at each first air outlet 53. The one-way valve is provided to make the first air outlet 53 unidirectional, and the air flow can only enter the first air outlet duct 51 or the second air outlet duct 52 from the inside of the cabinet 1 through the first air outlet 53. Both ends of each first air outlet duct 51 are fixedly connected to the top surface of the cabinet 1, and a first vent is formed at the connection between the first air outlet duct and the top surface of the cabinet 1. The first vent 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 1, the closing plate 23 can close the corresponding first vent. Both ends of each second air outlet duct 52 are fixedly connected to the top surface of the cabinet 1, and a second vent 521 is formed at the connection between the first air outlet duct 51 and the second air outlet duct 52. The second vent 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 1, the closing plate 23 can close the corresponding second vent 521. Each first air outlet duct 51 and the second air outlet duct 52 are provided with a second air outlet 54 at both ends. The second air outlet 54 passes through the side wall of the cabinet 1 and communicates with the outside world.

[0046] like Figure 9 and Figure 10As shown, a closing mechanism is provided in the first air outlet 51 and the second air outlet 52, and a closing mechanism is provided at each second air outlet 54. The closing mechanism includes a first curved plate 61, a stopper 62 and a turbine 63. The first curved plate 61 is provided at the second air outlet 54 and slides with the inner wall of the first air outlet 51 or the inner wall of the second air outlet 52. The turbine 63 is located next to the first curved plate 61. The turbine 63 rotates with the inner wall of the first air outlet 51 or the inner wall of the second air outlet 52. A stopper 62 is provided on the first curved plate 61, and the stopper 62 slides with the first curved plate 61. The stopper 62 is elastically connected to the first curved plate 61 by a spring, and the stopper 62 can be retracted into the first curved plate 61. When the turbine 63 rotates, the blades on the turbine 63 can stop with the stopper 62 and push the first curved plate 61 to rotate through the stopper 62. A second curved plate 64 is also provided next to the turbine 63. The second curved 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 curved plate 64 and the turbine 63 are spaced apart. A ventilation duct is formed between the second curved 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 airflow passes through the ventilation duct, the airflow can drive the turbine 63 to rotate.

[0047] The implementation principle of the AC low-voltage distribution cabinet of the embodiment of the present invention is: under normal conditions, external cold air enters the heat dissipation shell 21 from the first air inlet 211, and the fan 22 draws the cold air in the heat dissipation shell 21 to the first air inlet duct 41, and enters the second air inlet duct 42 along the first air inlet duct 41, and then enters the interior of the cabinet 1 from the third air inlet 43, thereby realizing the cold air flowing from bottom to top. During the air flow process, the heat generated by the electrical components in the cabinet 1 will be taken away, and the hot air carrying the heat will flow to the top of the cabinet 1, and enter the first air outlet duct 51 and the second air outlet duct 52 through the first air outlet 53, and then be discharged from the cabinet 1 from the second air outlet 54.

[0048] When it rains, rainwater will wash the inclined side walls of the heat dissipation shell 21, thereby cleaning the side walls of the heat dissipation shell 21 and preventing them from being blocked. Part of the rainwater will slide down along the inclined side walls of the heat dissipation shell 21, and another part of the rainwater will enter the heat dissipation shell 21 and fall between the side walls of the heat dissipation shell 21 and the waterproof block 3. Since the waterproof block 3 is provided on the surrounding side of the second air inlet 102, the waterproof block 3 can prevent water from entering the second air inlet 102. The rainwater entering the heat dissipation shell 21 will flow outward and be discharged from the first air inlet 211 at the bottom of the side wall of the heat dissipation shell 21.

[0049] If it is rainy and windy, rainwater will collect in the rainwater collection box 241, and the gravity of the rainwater will overcome the elastic force of the elastic part and push the rainwater collection box 241 to move downward, thereby exposing the wind shield 242, and the wind force will push the corresponding wind shield 242 to move. For example, when the external airflow moves from front to back, the wind force can push the wind shield 242 in the first slide groove 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 shell 21 through the pull rope 243, so that the closing plate 23 overcomes the elastic force of the torsion spring and moves upward, thereby closing the front side of the heat dissipation shell 21 and preventing rainwater from tilting into the heat dissipation shell 21 and passing over the waterproof block 3 into the second air inlet 102. When the closing plate 23 rotates upward, the first vent located on the front side of the heat dissipation housing 21 will be exposed, and the cold air will carry the rainwater into the first outlet pipe from the first vent and move from the front end of the first outlet pipe to the rear end of the first outlet pipe. During this process, the airflow will drive the two turbines 63 in the first outlet pipe to rotate, so that the turbine 63 on the front side rotates counterclockwise, the turbine 63 on the rear side rotates clockwise, and the turbine 63 on the front side rotates counterclockwise, thereby pushing the corresponding first curved plate 61 to rotate counterclockwise through the stopper 62, so that the first curved plate 61 can close the second outlet pipe on the front side of the first outlet pipe. The air vent 54, the turbine 63 on the rear side rotates clockwise, thereby pushing the corresponding first curved plate 61 to rotate clockwise through the block 62, keeping the second vent 521 on the rear side in an open state, and preventing the cold air and rainwater entering the first air outlet 51 from the front first vent from being directly discharged from the second air outlet 54 on the front side. The cold air and rainwater move along the first air outlet duct 51 and are discharged from the second air outlet 54 on the rear side. When the cold air and rainwater move in the first air outlet duct 51, they can reduce the temperature of the first air outlet duct 51, thereby reducing the temperature inside the cabinet 1, and further preventing the temperature inside the cabinet 1 from being too high.

[0050] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. An AC low-voltage distribution cabinet, comprising: Cabinet and heat dissipation components; The cabinet is arranged on the ground, and the heat dissipation component is arranged in the cabinet for dissipating heat; The heat dissipation component includes a heat dissipation shell, a fan and a closing plate, the heat dissipation shell is arranged at the top of the cabinet, each side wall of the heat dissipation shell is provided with a first air inlet, a plurality of closing plates are rotatably fitted in the heat dissipation shell, each closing plate corresponds to a side wall of the heat dissipation shell, a control mechanism is provided in the heat dissipation shell, the control mechanism is used to drive the closing plate to rotate, and 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 shell, the top of the cabinet is provided with a second air inlet, the fan is provided on the top surface of the cabinet, and is used to draw air in the heat dissipation shell into the interior of the cabinet through the second air inlet; The control mechanism includes a rainwater collection box, a windshield and a pull rope. The heat dissipation shell is provided with four first slide grooves extending in different directions along the horizontal plane. Each of the first slide grooves corresponds to a closing plate. A windshield is slidably fitted at each of the first slide grooves. The windshield can move along the corresponding first slide groove. The windshield is connected to the corresponding closing plate through the pull rope. The windshield can drive the closing plate to rotate through the pull rope. A rainwater collection box is slidably fitted at the end of each first slide groove. The rainwater collection box is connected to the heat dissipation shell through an elastic member. The rainwater collection box can cover the first slide groove.

2. The AC low-voltage distribution cabinet according to claim 1, characterized in that: A waterproof block is further provided in the heat dissipation housing. A plurality of waterproof blocks are continuously distributed along the circumference of the heat dissipation housing. Each of the waterproof blocks is distributed parallel to one of the closing plates. The plurality of waterproof blocks surround the circumference of the second air inlet.

3. The AC low-voltage distribution cabinet according to claim 1, characterized in that: An air inlet duct is provided in the cabinet, and the air inlet duct includes a first air inlet duct and a second air inlet duct. The first air inlet duct is vertically distributed, the top end of the first air inlet duct is connected to the fan, the bottom end of the first air inlet duct is connected to the second air inlet duct, the second air inlet duct is horizontally distributed, and the second air inlet duct is provided with a plurality of third air inlets distributed at intervals.

4. The AC low-voltage distribution cabinet according to claim 3, characterized in that: An air outlet duct is also provided on the top of the cabinet, and the air outlet duct includes a first air outlet duct and a second air outlet duct. The first air outlet duct is horizontally arranged and fixedly connected to the top surface of the cabinet. The second air outlet duct is horizontally arranged and located below the first air outlet duct. The first air outlet duct and the second air outlet duct are vertically distributed. First air outlets are provided on the side walls of the first air outlet duct and the second air outlet duct, and second air outlets are provided at both ends of the first air outlet duct and the second air outlet duct. The second air outlet is connected to the outside world.

5. The AC low-voltage distribution cabinet according to claim 4, characterized in that: The two ends of the first air outlet pipe and the second air outlet pipe are respectively connected to the bottom surface of the heat dissipation shell, and form a first vent and a second vent. The first vent and the second vent are respectively located between the side wall of the heat dissipation shell and the corresponding closing plate, and the closing plate can close the first vent or the second vent.

6. The AC low-voltage distribution cabinet according to claim 5, characterized in that: The first air outlet pipe and the second air outlet pipe are both provided with a closing mechanism, and the closing mechanism includes a first curved plate, a block and a turbine. The first curved plate is provided at the first air outlet or the second air outlet, and slides with the first air outlet pipe or the second air outlet pipe. The block slides on the first curved plate and is elastically connected to the first curved plate. The block can be retracted into the first curved plate. The turbine rotates and fits in the first air outlet pipe and / or the second air outlet pipe. The turbine can stop against the block, and the rotation of the turbine can push the first curved plate to move.

7. The AC low-voltage distribution cabinet according to claim 6, characterized in that: A second curved plate is provided beside the turbine, and the second curved plate can partially shield the turbine, thereby reducing the wind force required to drive the turbine to rotate.

8. The AC low-voltage distribution cabinet according to claim 1, characterized in that: The top of the heat dissipation housing is in a truncated cone shape, and rainwater can slide down along the top surface of the heat dissipation housing.

9. The AC low-voltage distribution cabinet according to claim 1, characterized in that: The cabinet body is rotatably equipped with a movable door, and the movable door is provided with a handle.

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