Low-voltage distribution box

Abstract

The utility model relates to a low-voltage distribution box, and belongs to the technical field of distribution boxes. The low-voltage distribution box comprises a box body and a heat dissipation assembly, the heat dissipation assembly comprises a heat dissipation fan, a ventilation pipe and a heat dissipation fan installation frame, the heat dissipation fan installation frame is installed outside the box body, a heat dissipation opening is formed in the box body, one end of the ventilation pipe is connected with the heat dissipation opening, and the other end of the ventilation pipe is connected with the heat dissipation fan installation frame. And the heat dissipation fan is arranged at the other end of the ventilation pipe so as to pump out hot air in the box body during rotation. According to the low-voltage distribution box, the heat dissipation fan is arranged outside the box body, hot air in the box body is pumped out through the ventilation pipe, heat generated by the heat dissipation fan during working can be prevented from being dissipated into the box body, and therefore the heat dissipation effect of the low-voltage distribution box is enhanced, the space of the box body is not occupied, and the low-voltage distribution box is convenient to use. And the waterproof sealing effect of the structure of the low-voltage distribution box is not damaged.

Description

Technical Field

[0001] The utility model relates to a low-voltage distribution box, belonging to the technical field of distribution boxes. Background Art

[0002] The low-voltage distribution box is an important part of the power system. It is mainly used to convert high-voltage electricity into low-voltage electricity for use in various electrical equipment. It is safe, reliable, compact, and easy to operate. It is widely used in industry, commerce, and residences. During the operation of the low-voltage distribution box, the electrical components inside it will generate a large amount of heat. If this heat is not discharged in time, it may cause the electrical components inside the low-voltage distribution box to burn, and then paralyze the entire system. In order to achieve heat dissipation of the low-voltage distribution box, the existing technology mostly equips the low-voltage distribution box with a cooling fan. The cooling fan itself is an electrical component. When it is working, the heat generated by itself will be directly transmitted to the inside of the low-voltage distribution box, affecting the heat dissipation effect of the low-voltage distribution box. Utility Model Content

[0003] The utility model aims to provide a low-voltage distribution box, which can reduce the influence of a cooling fan on the cooling effect.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] A low-voltage distribution box comprises a box body and a heat dissipation assembly, wherein the heat dissipation assembly comprises a heat dissipation fan, a ventilation pipe and a heat dissipation fan mounting frame, wherein the heat dissipation fan mounting frame is mounted outside the box body, a heat dissipation port is arranged on the box body, one end of the ventilation pipe is connected to the heat dissipation port, and the heat dissipation fan is arranged at the other end of the ventilation pipe to extract the hot air in the box body when rotating.

[0006] The low-voltage distribution box of the utility model improves the existing low-voltage distribution box. The heat dissipation fan is arranged outside the box, and the hot air inside the box is extracted by using a ventilation pipe, which can prevent the heat generated by the heat dissipation fan when working from being dissipated into the box, thereby enhancing the heat dissipation effect of the low-voltage distribution box, and does not occupy the box space, and will not damage the waterproof sealing effect of the low-voltage distribution box's own structure.

[0007] It can be understood that the size of the heat dissipation port is smaller than the size of the ventilation pipe.

[0008] Furthermore, the ventilation pipe is a telescopic pipe; the heat dissipation fan mounting frame includes a fixed frame and a movable frame, the fixed frame is fixedly connected to the box, the movable frame is movably arranged on the fixed frame and can generate displacement in the direction away from and close to the box when it moves; the heat dissipation fan is installed on the movable frame, and the other end of the ventilation pipe is connected to the movable frame. Using the telescopic pipe as the ventilation pipe, when the heat dissipation fan is needed to work for heat dissipation, the position of the movable frame can be adjusted to make the heat dissipation fan away from the box, thereby reducing the heat generated by the heat dissipation fan from being transferred to the box and affecting the heat dissipation effect; when heat dissipation is not needed, the movable frame can be adjusted to make the heat dissipation fan close to the box to reduce space occupation.

[0009] Furthermore, the telescopic tube is a corrugated telescopic tube, which can freely change its length according to the position of the movable frame, thereby reducing the space occupied by the telescopic tube when the movable frame is close to the box.

[0010] Furthermore, the movable frame includes a movable frame and a fixed ring fixedly connected to the movable frame, the heat dissipation fan is installed in the fixed ring, and the other end of the ventilation pipe is connected to the fixed ring. Installing the heat dissipation fan in the fixed ring can enhance the ability of the heat dissipation fan to extract hot air from the box body and enhance the heat dissipation effect.

[0011] Furthermore, the heat dissipation assembly further includes a heat dissipation port sealing plate for sealing the heat dissipation port, the size of the heat dissipation port sealing plate is smaller than the size of the telescopic tube; the heat dissipation port sealing plate is connected to the movable frame to seal the heat dissipation port when the movable frame moves toward the box body. The heat dissipation port sealing plate can prevent rainwater and external dust from entering the box body when the heat dissipation fan is not required to work, thereby improving the stability of the operation of the low-voltage distribution box.

[0012] Furthermore, a sealing rubber ring is arranged on the circumferential surface of the heat dissipation opening sealing disk. The sealing rubber ring is arranged on the circumferential surface of the heat dissipation opening sealing disk to improve the sealing effect of the heat dissipation opening sealing disk on the heat dissipation opening.

[0013] Furthermore, the fixing frame includes a strip-shaped fixing frame, one end of which is fixedly connected to the box body, and the extension direction of the fixing frame is perpendicular to the connection surface. The vertical connection surface of the fixing frame can further improve the sealing effect of the heat dissipation port sealing plate on the heat dissipation port.

[0014] Furthermore, the movable frame includes a movable frame and a fixed ring fixedly connected to the movable frame, and the other end of the ventilation pipe is connected to the fixed ring; the fixed ring includes a ring frame and a heat dissipation fan mounting seat connected to the ring frame, the heat dissipation fan is mounted on the heat dissipation fan mounting seat, and the heat dissipation port sealing plate is connected to the heat dissipation fan mounting seat through a connecting rod. Connecting the heat dissipation port sealing plate to the heat dissipation fan mounting seat can reduce the space occupied by the heat dissipation component when the heat dissipation fan is not needed to work, and realize the sealing of the heat dissipation port.

[0015] Furthermore, a heat dissipation fan protection net is arranged on the ring frame. The heat dissipation fan protection net can prevent the influence of foreign matter on the normal operation of the heat dissipation fan. The heat dissipation fan mounting seat and the heat dissipation fan protection net are arranged on the ring frame one after the other.

[0016] Furthermore, the heat dissipation fan mounting frame is provided with a reciprocating drive mechanism for driving the movable frame to move on the fixed frame to generate displacement in directions away from and close to the box body. Using the reciprocating drive mechanism to drive the movable frame to move on the fixed frame can simplify the operation process.

[0017] Furthermore, the fixed frame includes a strip-shaped fixed frame, the movable frame includes a movable frame, and the movable frame is mounted on the fixed frame; the reciprocating drive mechanism includes a rack, a tooth column and a motor, the rack is arranged in the fixed frame, the motor is arranged on the movable frame, and the tooth column is connected to the output shaft of the motor and meshes with the rack. When the motor is started, the movable frame is driven away from or close to the box body, and the rotation direction of the output shaft of the motor is controlled so that the movable frame moves away from the box body to open the cooling fan for heat dissipation. When the cooling fan is not needed, the motor is started to control the rotation direction of the output shaft so that the movable frame moves in the direction close to the box body, thereby reducing the space occupied by the heat dissipation component.

[0018] Furthermore, a sealing rubber frame is arranged on the frame of the box door of the box body. The sealing rubber frame arranged on the box door can improve the sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of a low-voltage distribution box according to Embodiment 1 of the present utility model;

[0020] Figure 2 It is a top sectional view of a low voltage distribution box of Embodiment 1 of the utility model;

[0021] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0022] Figure 4 A schematic diagram of a heat dissipation assembly of a low-voltage distribution box according to Embodiment 1 of the present utility model;

[0023] In the figure, 1-box, 2-heat dissipation assembly, 3-heat dissipation port, 4-heat dissipation fan, 5-corrugated telescopic tube, 6-box door, 7-rack, 8-movable frame, 9-fixing ring, 10-ring frame, 11-heat dissipation fan mounting seat, 12-protective net, 13-connecting plate, 14-heat dissipation port sealing disk, 15-connecting rod, 16-sealing rubber ring, 17-motor, 18-tooth column, 19-sealing rubber frame, 20-observation port. DETAILED DESCRIPTION

[0024] The technical solution of the utility model is further described below in conjunction with specific implementation methods.

[0025] Example 1

[0026] The low voltage distribution box of this embodiment is shown in FIG. Figure 1-4 , comprising a box body 1 and a heat dissipation assembly 2; the box body 1 comprises a box door 6 arranged at the front side, the frame of the box door 6 is provided with a sealing rubber frame 19, the box door 6 is also provided with an observation port 20, and a transparent plate is installed on the observation port 20, through which the situation inside the box body 1 can be very conveniently observed; the rear side wall of the box body 1 is provided with two heat dissipation ports 3 arranged in parallel in the horizontal direction;

[0027] The heat dissipation assembly 2 is installed outside the box body 1, including a heat dissipation fan 4, a corrugated telescopic tube 5 and a heat dissipation fan mounting frame, and the heat dissipation fan mounting frame includes a fixed frame, a movable frame and a reciprocating drive mechanism; the fixed frame includes a strip-shaped fixed frame 6, one end of the fixed frame 6 is fixedly connected to the rear side wall of the box body 1 so that the fixed frame 6 extends in the horizontal direction perpendicular to the rear wall of the box body 1, and the connection position is located in the middle of the two heat dissipation ports 3; the movable frame includes a movable frame 8 sleeved on the fixed frame 6 and two fixed rings 9 arranged on the left and right sides of the movable frame 8; the fixed ring 9 includes a ring frame 10 and a heat dissipation fan mounting seat 11 and a protective net 12 fixedly connected to the ring frame 10 one in front and one in the back, and the ring frame 10 is connected to the movable frame 8 through a connecting plate 13; the cross section of the vertical rotating shaft of the ring frame 10 is parallel to the rear side wall of the box body 1, and the ring frame 10 of the two fixed rings 9 The vertical projections on the rear side wall of the box body 1 are concentric circles with the two heat dissipation ports 3 respectively. The two heat dissipation ports 3 are respectively connected to the corresponding ring frames 10 through bellows telescopic tubes 5, and the diameter of the bellows telescopic tubes 5 is larger than the diameter of the heat dissipation ports 3; the heat dissipation fan 4 mounting seat is located at the center of the ring frame 10, and the heat dissipation fan 4 is mounted on the heat dissipation fan mounting seat 11 and is located in the enclosed space of the ring frame 10, the heat dissipation fan mounting seat 11 and the protective net 12; the heat dissipation component 2 also includes a heat dissipation port sealing disk 14, which is connected to the heat dissipation fan mounting seat 11 through a connecting rod 15, and the diameter of the heat dissipation port sealing disk 14 is smaller than the diameter of the bellows telescopic tube 5, and forms an annulus between the heat dissipation port sealing disk 14 and the bellows telescopic tube 5 when following the heat dissipation fan mounting seat 11 away from the box body 1; a sealing rubber ring 16 is fixed on the circumferential surface of the heat dissipation port sealing disk 14.

[0028] The reciprocating drive mechanism includes a motor 17, a rack 7 and a gear column 18. The motor 17 is arranged on the movable frame 8, the rack 7 is arranged on the inner side of the fixed frame 6, the gear column 18 is connected to the output shaft of the motor 17 and meshes with the rack 7, and the input end of the motor 17 is electrically connected to the output end of the external control switch group. When the motor 10 is turned on, it drives the movable frame 8 to move in the direction of the rear side wall of the vertical box body 1.

[0029] The working principle of the low-voltage distribution box of this embodiment is as follows: when heat dissipation is required, the motor 17 is started to make the gear column 18 rotate forward, and under the action of the rack 7, the gear column 18 moves with the movable frame 8 in the direction away from the box body 1. During this process, the fixed ring 9 connected to the movable frame 8 moves synchronously in the direction away from the box body 1, and the corrugated telescopic tube 5 begins to extend with the movement of the fixed ring 9, the heat dissipation port sealing disk 14 moves out of the heat dissipation port 3 and gradually moves away from the box body 1. After the movable frame 8 moves a certain distance, the motor 17 is turned off, and then the two cooling fans 4 are started to extract the hot air inside the box body 1 through the two heat dissipation ports 3. When heat dissipation through the heat dissipation ports 3 is not needed, the motor 17 is started to make the gear column 18 rotate in the opposite direction to drive the movable frame 8 to move in the direction close to the box body 1 until the heat dissipation port sealing disk 14 enters the heat dissipation port 3 to seal the heat dissipation port 3. After sealing, rainwater and dust can be prevented from entering.

[0030] The external control switch group used in this embodiment is provided with buttons corresponding to the cooling fan 4 and the motor 17 one by one. The motor 17 can be a 1LE0003 three-phase asynchronous motor, and the cooling fan 4 can be a D2E146 cooling fan.

[0031] Example 2

[0032] The low-voltage distribution box of this embodiment is different from the low-voltage distribution box of embodiment 1 only in that: the rack 7 is not provided on the fixed frame 6 of this embodiment, and the motor 17, the tooth column 18, the heat dissipation port sealing plate 14, the connecting rod 15 and the sealing rubber ring 16 in embodiment 1 are omitted, and the fixed frame 6 and the movable frame 8 are fixedly connected so that the movable frame 8 is immobile, and the corrugated telescopic tube 5 is replaced by an ordinary rubber tube. In this embodiment, since the heat dissipation fan 4 is far away from the box body 1, the heat generated by the heat dissipation fan when working can also be prevented from being transferred to the box body 1.

[0033] Example 3

[0034] The low-voltage distribution box of this embodiment is different from the low-voltage distribution box of Example 1 only in that: the extension direction of the fixed frame 6 of this embodiment is obliquely downward, and a crossbeam is arranged between the fixed frame 6 and the box body 1 to increase the stability of the fixed frame 6 when the heat dissipation fan 4 is working. At the same time, the sealing rubber ring 16 arranged on the circumferential surface of the heat dissipation port sealing disk 14 is omitted, so that a certain gap is generated between the heat dissipation port sealing disk 14 and the heat dissipation port 3, so that the heat dissipation port sealing disk 14 can enter the heat dissipation port 3 obliquely.

[0035] Example 4

[0036] The low-voltage distribution box of this embodiment is different from the low-voltage distribution box of Example 1 only in that the low-voltage distribution box of this embodiment omits the motor 17, the gear column 18 and the rack 7, and when the cooling fan 4 needs to work, the movable frame 8 is manually moved away from the box body 1.

[0037] Example 5

[0038] The low-voltage distribution box of this embodiment is different from the low-voltage distribution box of Example 1 only in that the low-voltage distribution box of this embodiment does not have a sealing rubber frame 19 on the frame of the box door, nor a protective net 12 on the ring frame 10, and the connecting rod is directly connected to the ring frame 10 through a bracket.

[0039] Example 6

[0040] The low-voltage distribution box of this embodiment is different from the low-voltage distribution box of Example 1 only in that the reciprocating drive mechanism of this embodiment includes a motor, a screw and a nut matching the screw, the motor is arranged on the fixed frame, the nut is arranged on the movable frame 8, and the screw passes through the nut and is connected to the output drawer of the motor.

Claims

1. A low-voltage distribution box, comprising a box body and a heat dissipation component, characterized in that: The heat dissipation assembly includes a heat dissipation fan, a ventilation pipe and a heat dissipation fan mounting frame. The heat dissipation fan mounting frame is installed outside the box. The box is provided with a heat dissipation port. One end of the ventilation pipe is connected to the heat dissipation port. The heat dissipation fan is arranged at the other end of the ventilation pipe to extract the hot air in the box when rotating.

2. The low voltage distribution box according to claim 1, characterized in that: The ventilation duct is a telescopic tube; the heat dissipation fan mounting frame includes a fixed frame and a movable frame, the fixed frame is fixedly connected to the box body, and the movable frame is movably arranged on the fixed frame and can generate displacement in the direction away from and close to the box body when moving; the heat dissipation fan is installed on the movable frame, and the other end of the ventilation duct is connected to the movable frame.

3. The low voltage distribution box according to claim 2, characterized in that: The movable frame comprises a movable frame and a fixing ring fixedly connected to the movable frame, the heat dissipation fan is installed in the fixing ring, and the other end of the ventilation pipe is connected to the fixing ring.

4. The low voltage distribution box according to claim 2, characterized in that: The telescopic tube is a corrugated telescopic tube.

5. The low voltage distribution box according to claim 2, characterized in that: The heat dissipation assembly also includes a heat dissipation port sealing plate for sealing the heat dissipation port, the size of the heat dissipation port sealing plate is smaller than the size of the telescopic tube; the heat dissipation port sealing plate is connected to the movable frame to seal the heat dissipation port when the movable frame moves toward the direction close to the box body.

6. The low voltage distribution box according to claim 5, characterized in that: A sealing rubber ring is arranged on the circumferential surface of the heat dissipation port sealing disk.

7. The low voltage distribution box according to claim 5, characterized in that: The fixing frame comprises a strip-shaped fixing frame, one end of which is fixedly connected to the box body, and an extending direction of the fixing frame is perpendicular to the connecting surface.

8. The low voltage distribution box according to claim 5, characterized in that: The movable frame includes a movable frame and a fixed ring fixedly connected to the movable frame, and the other end of the ventilation pipe is connected to the fixed ring; the fixed ring includes a ring frame and a cooling fan mounting seat connected to the ring frame, the cooling fan is installed on the cooling fan mounting seat, and the heat dissipation port sealing plate is connected to the cooling fan mounting seat through a connecting rod.

9. The low voltage distribution box according to claim 2, characterized in that: The heat dissipation fan mounting frame is provided with a reciprocating driving mechanism for driving the movable frame to move on the fixed frame to generate displacement in the direction away from and close to the box body.

10. The low voltage distribution box according to claim 9, characterized in that: The fixed frame includes a strip-shaped fixed frame, the movable frame includes a movable frame, and the movable frame is mounted on the fixed frame; the reciprocating drive mechanism includes a rack, a gear column and a motor, the rack is arranged in the fixed frame, the motor is arranged on the movable frame, and the gear column is connected to the output shaft of the motor and meshes with the rack.

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