Low-voltage cable branch box with flow guiding and heat dissipating functions

Abstract

The utility model belongs to cable branch box technical field especially, further more, it is a kind of low-voltage cable branch box with the effect of guiding flow and heat dissipation, including box and door, the inside of box has and the heat dissipation chamber of integrated connection on the top of Z direction, heat dissipation chamber includes: a plurality of first air hole, set up on the two side walls of heat dissipation chamber along X direction;Air outlet, set up on the top of heat dissipation chamber along Z direction, and is communicated with heat dissipation chamber;Exhaust fan, install at air outlet, for the air in heat dissipation chamber is discharged to the outside of box;The two side walls of box along X direction are also provided with a plurality of second air hole, the bottom surface of heat dissipation chamber along Z direction is provided with arc flow guide surface, arc flow guide surface is used to guide the hot air that rises to the bottom of heat dissipation chamber in box to the two sides of heat dissipation chamber along X direction;The utility model has the beneficial effects that realize the heat dissipation cooling of electrical components in box, optimize the air flow organization in box, improve overall heat dissipation efficiency.

Description

Technical Field

[0001] This utility model belongs to the technical field of low-voltage cable branch boxes, and particularly relates to a low-voltage cable branch box with heat dissipation and heat conduction functions. Background Technology

[0002] Low-voltage cable distribution boxes are core equipment in power distribution systems for cable branching and branch circuit distribution, and are widely used in indoor power distribution scenarios such as power distribution rooms in residential communities, factories, and commercial complexes. The circuit breakers, terminals, and other electrical components installed inside the box continuously generate heat during operation. If this heat cannot be dissipated in time, it can accelerate component aging, reduce insulation performance, and consequently affect the equipment's lifespan and operational reliability. Therefore, the heat dissipation performance of the box is a crucial indicator for ensuring the stable operation of the distribution box.

[0003] In existing technologies, most cable distribution boxes use natural heat dissipation by opening ventilation holes on the side walls. They rely on the density difference between the air inside and outside the box to achieve natural convection. The hot air inside the box rises and is discharged slowly, and a hot air stagnation zone easily forms on the top of the box. The overall heat dissipation efficiency is low, which makes it difficult to meet the heat dissipation requirements of high-load and high-heat-generating components. Utility Model Content

[0004] The purpose of this utility model is to address the aforementioned technical problems by providing a low-voltage cable branch box with heat dissipation and heat conduction functions, thereby solving the above-mentioned technical problems.

[0005] In view of this, the present invention provides a low-voltage cable branch box with heat dissipation function, including a box body and a box door. A heat dissipation chamber integrally connected to the box body is located on the top of the inner side of the box along the Z-direction. The heat dissipation chamber includes: Several first vent holes are provided on the two side walls of the heat dissipation chamber along the X direction. An air outlet is located at the top of the heat dissipation chamber along the Z-direction and is connected to the heat dissipation chamber. Exhaust fan: The exhaust fan is installed at the air outlet and is used to exhaust the air in the heat dissipation chamber to the outside of the box. Several second ventilation holes are provided on the two side walls of the box along the X direction, and an arc-shaped guide surface is provided on the bottom outer surface of the heat dissipation chamber along the Z direction. The arc-shaped guide surface is used to guide the hot air rising from the box to the bottom of the heat dissipation chamber to the two sides of the heat dissipation chamber along the X direction.

[0006] Furthermore, the heat dissipation chamber has an inclined bottom surface on the inner wall of the bottom along the Z direction, and a drain port is provided on the box body. The inclined bottom surface is used to guide the liquid in the heat dissipation chamber to the drain port.

[0007] Furthermore, it also includes a liquid collection box, which is detachably installed at the drain outlet to collect the liquid flowing out of the drain outlet.

[0008] Furthermore, the collection box and the housing are connected by fasteners.

[0009] Furthermore, water-retaining eaves are provided at both the first and second vents.

[0010] The beneficial effects of this utility model are: By using the exhaust fan, the air inside the heat dissipation chamber is drawn outward, creating a negative pressure inside the heat dissipation chamber. The hot air generated by the electrical components inside the chamber flows upward due to the density difference. After the rising hot air comes into contact with the arc-shaped guide surface at the bottom of the heat dissipation chamber, it splits into two streams along the arc-shaped surface and flows smoothly to the first vent on both sides of the heat dissipation chamber. It enters the heat dissipation chamber through the first vent and is then discharged to the outside environment by the exhaust fan at the air outlet.

[0011] Meanwhile, outside cold air continuously enters the cabinet through the second vents on both sides, forming a complete forced convection circulation to dissipate heat and cool the electrical components inside. The arc-shaped air guide surface guides and diverts the rising airflow, reducing airflow turbulence at the top, improving airflow smoothness, optimizing airflow organization within the cabinet, and enhancing overall heat dissipation efficiency. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a structural schematic diagram from another perspective of the present invention; Figure 3 This is a partial structural cross-sectional view of the heat dissipation chamber in this utility model; The markings in the diagram are as follows: 1. Box body; 11. Second vent; 12. Drain outlet; 2. Box door; 3. Heat dissipation chamber; 31. First vent; 32. Air outlet; 33. Arc-shaped guide surface; 34. Inclined bottom surface; 4. Exhaust fan; 5. Liquid collection box; 6. Water baffle. Detailed Implementation

[0013] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0014] In the description of this application, it should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. For ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0015] Example 1:

[0016] This embodiment provides a low-voltage cable distribution box with heat dissipation function, including a box body 1 and a box door 2. A heat dissipation chamber 3 is integrally connected to the top of the box body 1 along the Z-direction. The heat dissipation chamber 3 includes: A plurality of first vent holes 31 are provided on the two side walls of the heat dissipation chamber 3 along the X direction. An air outlet 32 ​​is located at the top of the heat dissipation chamber 3 along the Z direction and is connected to the heat dissipation chamber 3. Exhaust fan 4 is installed at the air outlet 32 ​​and is used to exhaust the air in the heat dissipation chamber 3 to the outside of the box 1. Among them, the two side walls of the box body 1 along the X direction are provided with several second ventilation holes 11, and the bottom outer surface of the heat dissipation chamber 3 along the Z direction is provided with an arc-shaped flow guide surface 33. The arc-shaped flow guide surface 33 is used to guide the hot air rising from the box body 1 to the bottom of the heat dissipation chamber 3 to the two sides of the heat dissipation chamber 3 along the X direction.

[0017] In this technical solution, the low-voltage cable branch box provided in this embodiment is applied to an indoor low-voltage power distribution system to realize the branching and control of cable lines. The low-voltage cable branch box is mainly composed of a box body 1, a box door 2, and a heat dissipation structure set on the top of the box body 1. An integrated heat dissipation chamber 3 is set on the top of the box body 1. The rising hot air inside the box is guided to flow to both sides through the arc-shaped air guiding surface 33. With the help of the exhaust fan 4, forced convection heat dissipation is achieved, improving the heat dissipation efficiency inside the box body 1.

[0018] Furthermore, a water-blocking eave 6 is provided at both the first vent 31 and the second vent 11.

[0019] The enclosure 1 is a hollow rectangular shell structure used to house electrical components such as circuit breakers and terminals. Several second vent holes 11 are provided on the two side walls along the X-direction of the enclosure 1. These second vent holes 11 are arranged in a linear array along the Z-direction, penetrating the side walls of the enclosure 1 and connecting the external environment with the internal installation chamber of the enclosure 1, serving as air intake channels for outside air to enter the enclosure 1. A water-retaining eave 6 is provided above the outer side of each second vent hole 11 to prevent liquid from entering the enclosure 1 through the second vent hole 11. The enclosure door 2 is hinged to the edge of the front opening of the enclosure 1, allowing the opening of the enclosure 1 to be opened and closed, preventing external debris and moisture from entering the enclosure from the front.

[0020] The heat dissipation chamber 3 is a closed cavity structure integrally connected to the top of the inner side of the housing 1, sharing an outer wall with the top wall of the housing 1, serving as a collection and exhaust chamber for hot air. Several first vent holes 31 are provided on the two side walls of the heat dissipation chamber 3 along the X direction, and these first vent holes 31 are arranged in a linear array along the Z direction. The holes penetrate the side walls of the heat dissipation chamber 3, connecting the installation chamber inside the housing 1 with the internal space of the heat dissipation chamber 3, serving as a flow channel for hot air from inside the housing to enter the heat dissipation chamber 3. Each first vent hole 31 is provided with a water-retaining eave 6 on one side of the heat dissipation chamber 3, allowing external liquid to enter the interior of the housing 1 through the first vent hole 31.

[0021] An air outlet 32 ​​is provided on the top end face of the heat dissipation chamber 3 along the Z direction. The air outlet 32 ​​is a through opening that connects the inside of the heat dissipation chamber 3 with the outside of the housing 1, serving as the main outlet for hot air in the heat dissipation chamber 3. An exhaust fan 4 is installed at the air outlet 32, with the air inlet side of the fan facing the inside of the heat dissipation chamber 3 and the air outlet side facing the outside of the housing 1. When running, it can draw the air out of the heat dissipation chamber 3, creating a negative pressure inside the chamber, which in turn drives the hot air in the housing 1 to continuously flow into the heat dissipation chamber 3, achieving forced exhaust heat dissipation.

[0022] On the bottom outer wall of the heat dissipation chamber 3 along the Z direction, that is, the lower wall surface facing the interior of the housing 1, an arc-shaped airflow guide surface 33 is set. The arc-shaped airflow guide surface 33 has an arc-shaped structure along the X direction, which is low in the middle and high on both sides, with the arc surface arching downwards. When the hot air inside the housing 1 flows upward to the top, it will be split into two streams along the arc-shaped airflow guide surface 33 after hitting it, guiding the hot air to flow smoothly to the first vents 31 on both sides of the heat dissipation chamber 3, reducing the turbulence and stagnation of airflow at the top of the housing 1, and improving the collection and circulation efficiency of hot air.

[0023] Through the above structural design, when the cable branch box is in operation and dissipating heat, the exhaust fan 4 starts running, drawing air out of the heat dissipation chamber 3, creating a negative pressure inside the heat dissipation chamber 3. The hot air generated by the electrical components inside the box 1 flows upwards due to the density difference. The rising hot air contacts the arc-shaped guide surface 33 at the bottom of the heat dissipation chamber 3, then flows smoothly to the first vents 31 on both sides of the heat dissipation chamber 3, entering the heat dissipation chamber 3 through the first vents 31, and is then discharged to the outside environment by the exhaust fan 4 at the outlet 32. Simultaneously, outside cold air continuously enters the box 1 through the second vents 11 on both sides of the box 1, forming a complete forced convection circulation, achieving heat dissipation and cooling of the electrical components inside the box. The arc-shaped guide surface 33 guides and diverts the rising airflow, reducing airflow turbulence at the top, improving the smoothness of airflow, optimizing the airflow organization inside the box, and improving overall heat dissipation efficiency.

[0024] Example 2:

[0025] This embodiment provides a low-voltage cable branch box with heat dissipation and heat conduction functions. In addition to the technical solutions of the above embodiments, it also has the following technical features.

[0026] Furthermore, the heat dissipation chamber 3 has an inclined bottom surface 34 on the inner wall of the bottom along the Z direction, and the box body 1 has a drain port 12. The inclined bottom surface 34 is used to guide the liquid in the heat dissipation chamber 3 to the drain port 12.

[0027] In this technical solution, the bottom inner wall of the heat dissipation chamber 3 along the Z direction, that is, the lower wall surface inside the heat dissipation chamber 3, is set as an inclined bottom surface 34. The inclined bottom surface 34 is inclined to one side along the Y direction, and the lower end of the inclination corresponds to the back of the box body 1. A drain port 12 is provided on the back of the box body 1. The drain port 12 is connected to the bottom space inside the heat dissipation chamber 3 and is used to drain liquid that accidentally enters the heat dissipation chamber 3 from the air outlet 32. The liquid will flow down the inclined bottom surface 34 and finally be discharged to the outside of the box body 1 through the drain port 12.

[0028] Furthermore, it also includes a liquid collection box 5, which is detachably installed at the drain port 12 to collect the liquid flowing out of the drain port 12. This structural design enables liquid collection and prevents liquid from dripping into the work area and causing pollution.

[0029] Furthermore, the liquid collection box 5 and the housing 1 are connected by fasteners. This structural design allows the liquid collection box 5 to be disassembled and cleaned, facilitating continued use and demonstrating high practicality.

[0030] The embodiments of this application have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. This application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A low-voltage cable distribution box with heat dissipation function, comprising a box body (1) and a box door (2), characterized in that, A heat dissipation chamber (3) integrally connected to the top of the box (1) along the Z direction is provided on the inner side of the box (1). The heat dissipation chamber (3) includes: A plurality of first vent holes (31) are provided on the two side walls of the heat dissipation chamber (3) along the X direction; An air outlet (32) is located at the top of the heat dissipation chamber (3) along the Z direction and is connected to the heat dissipation chamber (3); An exhaust fan (4) is installed at the air outlet (32) to exhaust the air in the heat dissipation chamber (3) to the outside of the box (1); The box (1) is provided with several second ventilation holes (11) on both sides along the X direction. The heat dissipation chamber (3) is provided with an arc-shaped guide surface (33) on the bottom outer surface along the Z direction. The arc-shaped guide surface (33) is used to guide the hot air rising from the box (1) to the bottom of the heat dissipation chamber (3) to both sides of the heat dissipation chamber (3) along the X direction.

2. A low-voltage cable branch box with heat dissipation function according to claim 1, characterized in that, The heat dissipation chamber (3) has an inclined bottom surface (34) on the inner wall of the bottom along the Z direction, and the box body (1) has a drain port (12). The inclined bottom surface (34) is used to guide the liquid in the heat dissipation chamber (3) to the drain port (12).

3. A low-voltage cable branch box with heat dissipation function according to claim 2, characterized in that, It also includes a liquid collection box (5), which is detachably installed at the drain port (12) for collecting liquid flowing out from the drain port (12).

4. A low-voltage cable branch box with heat dissipation and heat conduction function according to claim 3, characterized in that, The liquid collection box (5) and the box body (1) are connected by fasteners.

5. A low-voltage cable branch box with heat dissipation and heat conduction function according to claim 1, characterized in that, Water-blocking eaves (6) are provided at both the first vent (31) and the second vent (11).

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