Power distribution box and heat dissipation and maintenance method thereof

Abstract

The invention discloses a power distribution box and a heat dissipation and maintenance method thereof, and the power distribution box comprises a power distribution box main body, the side part of the power distribution box main body is provided with an air inlet, the top of the power distribution box main body is provided with an air outlet, and the power distribution box also comprises a mounting rack slidably arranged in the power distribution box main body. The heat dissipation mechanism and the maintenance mechanism are integrated on the power distribution box main body; the heat dissipation mechanism comprises a heat dissipation assembly which can move back and forth along the air outlet and is used for performing active heat dissipation on the interior of the power distribution box main body; and the maintenance mechanism is connected with the mounting rack and is used for driving the mounting rack to slide out of the power distribution box main body. The invention aims to improve the heat dissipation effect, overcome the problem of insufficient efficiency of passive heat dissipation in occasions with high load, high environment temperature or dense elements, improve the maintenance convenience, and solve the problems of narrow operation space, blocked sight, low maintenance efficiency and easy safety risk caused by fixation or local opening and closing of the mounting rack.

Description

Technical Field

[0001] This invention relates to the field of power distribution box technology, and in particular to a power distribution box and its heat dissipation and maintenance method. Background Technology

[0002] Power distribution boxes are key equipment in building power supply and distribution systems, undertaking important functions such as power distribution, line control, and circuit protection. They typically integrate various electrical components such as circuit breakers, electricity meters, and relays. These components generate heat during operation; if this heat cannot be dissipated in time, it may lead to performance degradation, accelerated aging, or even safety accidents such as short circuits and fires.

[0003] Currently, various improvement solutions have been proposed in the industry to enhance heat dissipation. For example, Chinese invention patent CN220775097U discloses a power distribution box with a ventilation channel between the bottom of the box and the mounting base, and heat dissipation holes on the bottom surface of the box. This solution relies on natural air convection and is a passive heat dissipation method. In practical applications, especially in situations with high loads, high ambient temperatures, or dense internal components, passive heat dissipation is often inefficient and struggles to quickly and evenly remove accumulated heat, indicating significant room for improvement in heat dissipation performance.

[0004] On the other hand, distribution boxes require regular inspection and maintenance. Currently, most common distribution boxes have fixed mounting brackets for internal components, or can only be opened and closed in a limited manner. Maintenance personnel need to reach their hands or even their bodies into the box to work, which results in a cramped operating space and obstructed vision. This not only leads to low maintenance efficiency but also increases the risk of safety hazards due to tool contact or inconvenience in operation.

[0005] In summary, existing power distribution boxes still have shortcomings in terms of heat dissipation and ease of maintenance. Summary of the Invention

[0006] To address the problems existing in the prior art, the present invention provides a power distribution box and its heat dissipation and maintenance method, which aims to improve the heat dissipation effect and overcome the problem of insufficient efficiency of passive heat dissipation in situations with high load, high ambient temperature or dense components. At the same time, it improves the convenience of maintenance and solves the problems of limited operating space, obstructed vision, low maintenance efficiency and easy safety risks caused by fixed or partially opened mounting brackets.

[0007] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution: According to a first aspect of the present invention, a power distribution box is provided, comprising a power distribution box body, an air inlet on the side of the power distribution box body, an air outlet on the top, and a mounting bracket slidably disposed inside the power distribution box body, as well as a heat dissipation mechanism and a maintenance mechanism integrated on the power distribution box body. The heat dissipation mechanism includes a heat dissipation component that can reciprocate along the air outlet, used for actively dissipating heat from the interior of the power distribution box body; The maintenance mechanism is connected to the mounting bracket and is used to drive the mounting bracket to slide out of the main body of the power distribution box.

[0008] In one possible implementation of the first aspect, a guide block is fixed to the bottom of the mounting bracket, and a guide groove adapted to the guide block is opened on the inner wall of the main body of the power distribution box, and the guide block is slidably disposed in the guide groove.

[0009] In one possible implementation of the first aspect, the maintenance mechanism includes a drive shaft and a driven shaft rotatably disposed within the main body of the power distribution box, an adjusting block sleeved on the drive shaft and the driven shaft, and a transmission assembly connecting the drive shaft and the driven shaft; The adjusting block is fixedly connected to the mounting bracket. When the drive shaft is configured to rotate under drive, it drives the driven shaft to rotate synchronously through the transmission assembly, thereby driving the two adjusting blocks to move the mounting bracket horizontally.

[0010] In one possible implementation of the first aspect, the transmission assembly includes a driving synchronous pulley fixed to the driving shaft, a driven synchronous pulley fixed to the driven shaft, and a synchronous belt sleeved on the driving synchronous pulley and the driven synchronous pulley.

[0011] In one possible implementation of the first aspect, the heat dissipation mechanism includes a forward and reverse motor, a fixed shaft driven by the forward and reverse motor and arranged laterally, and a movable block sleeved on the fixed shaft; The heat dissipation component is fixed to the movable block, and the forward and reverse motor is configured to drive the fixed shaft to rotate in both directions, so as to drive the movable block and the heat dissipation component to reciprocate along the fixed shaft.

[0012] In one possible implementation of the first aspect, the heat dissipation assembly includes a heat dissipation motor and heat dissipation fan blades driven by the heat dissipation motor, the heat dissipation motor being fixed within a movable frame connected to the bottom of the movable block.

[0013] In one possible implementation of the first aspect, the heat dissipation mechanism further includes a cleaning component, which includes a fixed bevel gear fixed to the fixed shaft, an adjusting bevel gear meshing with the fixed bevel gear, an eccentric wheel driven by the adjusting bevel gear, and a push rod cooperating with the eccentric wheel. One end of the push rod is connected to a cleaning plate. When the fixed shaft rotates, the fixed bevel gear and the adjusting bevel gear drive the eccentric wheel to rotate, thereby pushing the push rod and the cleaning plate to reciprocate along the air outlet for cleaning.

[0014] In one possible implementation of the first aspect, a cleaning brush is provided on the bottom surface of the cleaning plate. The cleaning brush is made of silicone and its surface is coated with Teflon coating.

[0015] In one possible implementation of the first aspect, a fixing rod parallel to the fixing axis is fixed to the top of the main body of the power distribution box, and the cleaning plate is slidably sleeved on the fixing rod via a moving block; A reset spring is fitted onto the fixed rod, and the reset spring acts on the moving block to provide a reset force for the cleaning plate.

[0016] According to a second aspect of the present invention, a method for heat dissipation and maintenance of a power distribution box is provided, applied to the power distribution box, comprising: The heat dissipation mechanism integrated on the main body of the power distribution box is activated, and the heat dissipation component included in the heat dissipation mechanism is driven to move back and forth along the air outlet. At the same time, the heat dissipation component is made to work, and forced air cooling is performed on the inside of the main body of the power distribution box. When it is necessary to inspect and repair the electrical components on the mounting bracket, the maintenance mechanism integrated on the main body of the power distribution box is operated, and the mounting bracket is slid out of the main body of the power distribution box by the maintenance mechanism.

[0017] Compared with the prior art, the present invention has at least the following beneficial effects: The power distribution box provided by this invention achieves dynamic forced air cooling by integrating a heat dissipation mechanism that can reciprocate along the top air outlet. Upon activation, the heat dissipation component generates forced airflow and moves along the air outlet direction, thus scanning different areas within the box. Compared to passive cooling relying on natural convection, this method significantly improves heat dissipation intensity, accelerates forced air exchange between the inside and outside of the box, quickly removes accumulated heat, and, due to the movement of the heat dissipation component, minimizes the formation of localized heat dissipation dead zones, ensuring effective cooling of heat-dissipating components. This solves the problem of insufficient passive heat dissipation efficiency in high-load, high-temperature, or densely installed environments, effectively reducing the risk of component performance degradation and short-circuit fires caused by overheating. When inspection or maintenance is required, operators can slide the entire mounting bracket containing all electrical components horizontally out of the box by driving the maintenance mechanism. Workers no longer need to extend their bodies into the box, gaining ample operating space and visibility, allowing for safe and convenient inspection or replacement of all components. It improves the efficiency of inspection and maintenance work and eliminates the safety risks such as electric shock and collisions that may be caused by using tools in crowded enclosures. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the specific embodiments of the present invention, the drawings used in the description of the specific embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the front cross-sectional structure of a power distribution box according to the present invention; Figure 2 This is a rear cross-sectional view of a power distribution box according to the present invention. Figure 3 This is a schematic diagram of the overall three-dimensional structure of a power distribution box according to the present invention; Figure 4 This is a three-dimensional structural diagram of the heat dissipation mechanism of a power distribution box according to the present invention; Figure 5 This is a three-dimensional structural diagram of a heat dissipation component for a power distribution box according to the present invention; Figure 6 This is a three-dimensional structural diagram of a maintenance mechanism for a power distribution box according to the present invention.

[0020] The following are the annotations in the diagram: 1. Main body of the power distribution box; 2. Fixing plate; 3. Air inlet; 4. Guide block; 5. Guide groove; 6. Mounting bracket; 7. Maintenance mechanism; 701. Drive shaft; 702. Synchronous belt; 703. Driven synchronous pulley; 704. Driven shaft; 705. Adjusting block; 706. Driven synchronous pulley; 8. Heat dissipation mechanism; 801. Fixed shaft; 802. Cleaning plate; 803. Eccentric wheel; 804. Forward and reverse motor; 805. Push rod; 806. Adjusting shaft; 807. Fixed bevel gear; 808. Adjusting bevel gear; 809. Heat dissipation fan blade; 810. Movable block; 811. Rotating shaft; 812. Heat dissipation motor; 813. Moving frame; 9. Air outlet; 10. Fixing rod; 11. Fixing frame; 12. PLC controller; 13. Return spring; 14. Moving block. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] like Figure 1 , Figure 2 and Figure 3 As shown, this embodiment provides a power distribution box that is easy to maintain, including a rectangular power distribution box body 1 as the main housing. Multiple air inlets 3 are respectively opened on the opposite side walls of the power distribution box body 1. A long strip-shaped air outlet 9 is opened on the top panel of the power distribution box body 1. Inside the power distribution box body 1, there is a mounting bracket 6 for centrally installing electrical components such as circuit breakers and electricity meters. This mounting bracket 6 is not fixedly installed, but is arranged inside the box in a horizontally sliding manner.

[0023] To achieve active and efficient heat dissipation, a fixed frame 11 is welded to one side of the top of the power distribution box body 1. A heat dissipation mechanism 8 is installed inside this fixed frame 11. The heat dissipation mechanism 8 includes a heat dissipation component that can reciprocate along the extension direction of the elongated air outlet 9 at the top. Activating this heat dissipation component allows for active forced air cooling of the interior of the power distribution box body 1.

[0024] To facilitate the inspection and maintenance of electrical components on the mounting bracket 6, a maintenance mechanism 7 is integrated inside the main body 1 of the power distribution box. The output of the maintenance mechanism 7 is connected to the mounting bracket 6. When maintenance is required, the operator can smoothly slide the entire mounting bracket 6 horizontally out of the main body 1 of the power distribution box through the maintenance mechanism 7, so that all electrical components are fully exposed for easy inspection, maintenance or replacement.

[0025] In one possible implementation, see [link to implementation details]. Figure 1 and Figure 2 To ensure that the mounting bracket 6 moves along a straight trajectory without jamming or shifting during sliding, a guide block 4 is fixedly installed on each of the left and right sides of the bottom of the mounting bracket 6. Correspondingly, two guide grooves 5, matching the shape and size of the guide blocks 4, are machined on the inner bottom plate of the power distribution box body 1. During assembly, the two guide blocks 4 are respectively embedded into their corresponding guide grooves 5. When the maintenance mechanism 7 drives the mounting bracket 6 to move, the guide blocks 4 slide within the guide grooves 5. The guide grooves 5 limit and guide the sliding of the guide blocks 4, ensuring the stable movement of the mounting bracket 6. The maintenance mechanism 7 is slidably connected to the power distribution box body 1 through the guide blocks 4 and the guide grooves 5.

[0026] In one possible implementation, such as Figure 2 and Figure 6 As shown, in this embodiment, the maintenance mechanism 7 is mounted on a fixed plate 2 fixed to the rear side inside the main body 1 of the power distribution box, and the maintenance mechanism 7 is disposed inside the fixed plate 2. The maintenance mechanism 7 mainly includes a drive shaft 701 and a driven shaft 704, which are supported parallel to each other and rotatably on the fixed plate 2 by bearings. On the drive shaft 701 and the driven shaft 704, an adjusting block 705 is sleeved, which can rotate with the shaft and move axially. Both adjusting blocks 705 are fixedly connected to the back of the mounting bracket 6.

[0027] The drive shaft 701 and driven shaft 704 are linked by a transmission assembly. When the operator rotates the end of the drive shaft 701 extending from the housing using a tool or by hand, power is synchronously transmitted to the driven shaft 704 through the transmission assembly, causing the driven shaft 704 to rotate synchronously and in the same direction as the drive shaft 701. The rotational motion of the two shafts drives the adjusting blocks 705 on them to move horizontally in a linear motion. Since both adjusting blocks 705 are fixed to the mounting bracket 6, they can work together to smoothly move the entire mounting bracket 6 horizontally, enabling it to slide out or retract.

[0028] In one possible implementation, such as Figure 6As shown, the transmission component used in this embodiment is a synchronous belt drive mechanism. Specifically, a driving synchronous pulley 706 is fixedly installed on the driving shaft 701, and a driven synchronous pulley 703 is fixedly installed on the driven shaft 704. A closed synchronous belt 702 is sleeved on the driving synchronous pulley 706 and the driven synchronous pulley 703. When the driving shaft 701 is driven to rotate, it drives the driving synchronous pulley 706 to rotate. Through the meshing transmission of the synchronous belt 702, the driven synchronous pulley 703 and the driven shaft 704 are driven to rotate at the same speed and direction. This transmission method ensures synchronous power transmission. Two adjusting blocks 705 are provided, and the two adjusting blocks 705 are symmetrically distributed. The longitudinal section of both adjusting blocks 705 is T-shaped, which makes the force on both sides of the mounting frame 6 uniform and the movement more stable.

[0029] In one possible implementation, such as Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, the heat dissipation mechanism 8 in this embodiment includes a forward and reverse motor 804 disposed inside the fixed frame 11. The output shaft of the forward and reverse motor 804 is connected to a horizontally arranged fixed shaft 801 and can drive the fixed shaft 801 to rotate. A movable block 810 is sleeved on the fixed shaft 801 through its internal threaded hole or bearing sleeve or other structure. The movable block 810 and the fixed shaft 801 form a threaded transmission pair or a similar motion conversion mechanism.

[0030] Preferably, a PLC controller 12 is connected to the outside of the power distribution box body 1. The forward and reverse motor 804 is configured to receive control signals from the PLC controller 12 to rotate forward and reverse. When the forward and reverse motor 804 is started, it drives the fixed shaft 801 to rotate in the forward and reverse directions. The rotational motion is converted into linear motion of the movable block 810 along the axial direction of the fixed shaft 801 through threaded transmission, thereby causing the movable block 810 to reciprocate horizontally on the fixed shaft 801. The heat dissipation component is directly fixedly installed on the movable block 810 and moves with it.

[0031] In one possible implementation, such as Figure 4 and Figure 5As shown, in this embodiment, the heat dissipation assembly fixed on the movable block 810 mainly includes a heat dissipation motor 812 and a heat dissipation fan blade 809 driven by the heat dissipation motor 812. The heat dissipation motor 812 is installed and fixed inside a movable frame 813. The bottom end of the movable frame 813 is welded and fixed to the bottom end of the movable block 810, and the heat dissipation motor 812 is fixed inside the movable frame 813. A rotating shaft 811 is fixed to the bottom end of the heat dissipation motor 812, and the heat dissipation fan blade 809 is provided at the bottom end of the rotating shaft 811. Thus, the entire movable frame 813, the heat dissipation motor 812, and the heat dissipation fan blade 809 form a whole, which can move together with the movable block 810. During operation, the heat dissipation motor 812 is started, and its output shaft drives the heat dissipation fan blade 809 to rotate at high speed, generating forced airflow.

[0032] In one possible implementation, such as Figure 3 and Figure 4 As shown, in this embodiment, the heat dissipation mechanism 8 further includes a cleaning assembly driven by a fixed shaft 801. The cleaning assembly includes a fixed bevel gear 807 fixedly mounted on the fixed shaft 801. An adjusting bevel gear 808 meshes perpendicularly with the fixed bevel gear 807. The adjusting bevel gear 808 is fixedly mounted on an adjusting shaft 806, which is supported by bearings. An eccentric wheel 803 is also fixedly mounted on the adjusting shaft 806.

[0033] A push rod 805 is horizontally positioned, with one end (right end in the figure) in contact with the contour surface of the eccentric wheel 803. The other end of the push rod 805 (left end in the figure) is connected to a long strip-shaped cleaning plate 802, which is located above the air outlet 9. One side of the cleaning plate 802 is fixedly connected to the moving block 14.

[0034] The working process is as follows: When the fixed shaft 801 rotates under the drive of the forward and reverse motors 804, it simultaneously drives the fixed bevel gear 807 to rotate. The fixed bevel gear 807 drives the adjusting bevel gear 808, which meshes with it, to rotate, thereby driving the adjusting shaft 806 and the eccentric wheel 803 to rotate. During the rotation of the eccentric wheel 803, its protruding part periodically pushes the push rod 805 to move in one direction, and the push rod 805 in turn drives the cleaning plate 802 to perform a scraping motion along the length of the air outlet 9. After the protruding part of the eccentric wheel has rotated, the cleaning plate 802 returns to its original position under the action of the reset mechanism, thereby realizing the reciprocating cleaning of the dust filter of the air outlet 9 by the cleaning plate 802 and preventing dust accumulation and blockage.

[0035] In one possible implementation, to make cleaning more effective and without damaging the air outlet structure, a cleaning brush is evenly adhered to the bottom surface of the cleaning plate 802 facing the air outlet 9. The cleaning brush is preferably made of a flexible and wear-resistant silicone material. To further enhance the self-cleaning ability and dust resistance of the cleaning brush, a Teflon coating is evenly applied to the outer surface of the cleaning brush, making its surface smoother and less prone to dust accumulation.

[0036] In one possible implementation, such as Figure 1 and Figure 3 As shown, to constrain the movement direction of the cleaning plate 802 and make it reciprocate along a straight line, a fixing rod 10 is fixed to the top of the main body 1 of the power distribution box. The fixing rod 10 is set parallel to the fixing shaft 801. The cleaning plate 802 is not directly rigidly connected to the push rod 805, but indirectly connected through a moving block 14. The moving block 14 is uniformly sleeved on the outer side of the fixing rod 10, and the cleaning plate 802 is fixed to the moving block 14. In this way, the fixing rod 10 and the moving block 14 form a sliding guide pair, ensuring the straightness of the movement trajectory of the cleaning plate 802.

[0037] In one possible implementation, such as Figure 3 As shown, a return spring 13 is evenly wound around the outside of the fixed rod 10. Two return springs 13 are provided, symmetrically distributed. One end of each return spring 13 abuts against the connection between the moving block 14 or the cleaning plate 802, and the other end abuts against the fixed structure at the top of the power distribution box body 1. When the eccentric wheel 803 pushes the push rod 805, thereby causing the cleaning plate 802 and the moving block 14 to move to one side against the elastic force of the return spring 13, the return spring 13 is compressed. When the eccentric wheel 803 rotates past its highest point, and the pushing force on the push rod 805 decreases or disappears, the compressed return spring 13 releases its stored elastic potential energy, pushing the moving block 14 and the cleaning plate 802 to move in the opposite direction, automatically returning them to their initial position, thus preparing for the next cleaning push and completing the continuous reciprocating cleaning action. All return springs 13 are made of stainless steel to ensure corrosion resistance.

[0038] In use, the power distribution box 1 is connected to the mains power supply via wires. When the heat inside the power distribution box 1 is high, the PLC controller 12 controls the cooling motor 812 to rotate, which in turn causes the rotating shaft 811 to rotate, and consequently the cooling fan blades 809 to rotate. The rotation of the cooling fan blades 809 accelerates the airflow inside the power distribution box 1, creating negative pressure or induced airflow. This draws in cool air from the lower side air inlet 3, carrying away the heat generated by the electrical components and forcibly expelling it from the higher top air outlet 9, thus achieving active and efficient heat dissipation. In other words, when heat dissipation is needed, the cooling motor 812 is activated, driving the cooling fan blades 809 to rotate. The rotation of the cooling fan blades 809 creates a strong suction effect at the top air outlet 9, continuously drawing hot air out of the box. This suction effect creates negative pressure inside the box, causing a continuous flow of cool air from the outside through the side air inlet 3. As cold air rises, it cools the electrical components on the mounting bracket 6, carrying heat and rising to the top as hot air before being exhausted. The PLC controller 12 controls the start of the forward and reverse motor 804, causing the fixed shaft 801 to rotate in both directions. This causes the movable block 810 to reciprocate horizontally, resulting in a synchronous movement of the moving frame 813. This allows for adjustment of the cooling fan blades 809, facilitating airflow to different areas inside the power distribution box 1 and improving heat dissipation. Simultaneously, the fixed shaft 801 rotates in both directions, causing the fixed bevel gear 807 to move synchronously. Gear 807 and adjusting bevel gear 808 mesh, so while fixed bevel gear 807 rotates, adjusting bevel gear 808 rotates in both directions, causing adjusting shaft 806 to move synchronously. This, in turn, causes eccentric wheel 803 to move. As eccentric wheel 803 rotates, it pushes push rod 805 to move horizontally. With the cooperation of moving block 14 and fixed rod 10, cleaning plate 802 moves horizontally, thus cleaning air outlet 9. When one side of eccentric wheel 803 moves away from push rod 805, cleaning plate 802 is reset by return spring 13. The above operation facilitates reciprocating cleaning of air outlet 9, thereby improving the cleaning effect and preventing blockage.

[0039] In the description of this invention, it should be understood that the terms "upper", "lower", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0040] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0041] In this invention, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0042] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0043] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0044] Finally, it should be noted that the above-described embodiments are merely specific implementations of the present invention, used to illustrate the technical solutions of the present invention, and not to limit them. The scope of protection of the present invention is not limited thereto. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments within the scope of the technology disclosed in the present invention, or make equivalent substitutions for some of the technical features; and these modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be covered within the scope of protection of the present invention.

Claims

1. A power distribution box, comprising a power distribution box body (1), wherein an air inlet (3) is provided on the side of the power distribution box body (1) and an air outlet (9) is provided on the top, characterized in that, It also includes a mounting bracket (6) that is slidably disposed inside the main body (1) of the power distribution box, and a heat dissipation mechanism (8) and a maintenance mechanism (7) integrated on the main body (1) of the power distribution box. The heat dissipation mechanism (8) includes a heat dissipation component that can reciprocate along the air outlet (9) for actively dissipating heat inside the main body (1) of the power distribution box. The maintenance mechanism (7) is connected to the mounting bracket (6) and is used to drive the mounting bracket (6) to slide out of the main body (1) of the power distribution box.

2. The power distribution box according to claim 1, characterized in that, The bottom of the mounting bracket (6) is fixed with a guide block (4), and the inner wall of the power distribution box body (1) is provided with a guide groove (5) that is compatible with the guide block (4). The guide block (4) is slidably disposed in the guide groove (5).

3. A power distribution box according to claim 1, characterized in that, The maintenance mechanism (7) includes a drive shaft (701) and a driven shaft (704) rotatably disposed in the main body (1) of the power distribution box, an adjusting block (705) sleeved on the drive shaft (701) and the driven shaft (704), and a transmission assembly connecting the drive shaft (701) and the driven shaft (704); The adjusting block (705) is fixedly connected to the mounting bracket (6). When the drive shaft (701) is driven to rotate, it drives the driven shaft (704) to rotate synchronously through the transmission assembly, thereby driving the two adjusting blocks (705) to drive the mounting bracket (6) to move horizontally.

4. A power distribution box according to claim 3, characterized in that, The transmission assembly includes a driving synchronous pulley (706) fixed on the driving shaft (701), a driven synchronous pulley (703) fixed on the driven shaft (704), and a synchronous belt (702) sleeved on the driving synchronous pulley (706) and the driven synchronous pulley (703).

5. A power distribution box according to claim 1, characterized in that, The heat dissipation mechanism (8) includes a forward and reverse motor (804), a fixed shaft (801) driven by the forward and reverse motor (804) and arranged laterally, and a movable block (810) sleeved on the fixed shaft (801). The heat dissipation component is fixed on the movable block (810), and the forward and reverse motor (804) is configured to drive the fixed shaft (801) to rotate forward and reverse, so as to drive the movable block (810) and the heat dissipation component to reciprocate along the fixed shaft (801).

6. A power distribution box according to claim 5, characterized in that, The heat dissipation assembly includes a heat dissipation motor (812) and a heat dissipation fan blade (809) driven by the heat dissipation motor (812), wherein the heat dissipation motor (812) is fixed in a movable frame (813) connected to the bottom of the movable block (810).

7. A power distribution box according to claim 5 or 6, characterized in that, The heat dissipation mechanism (8) further includes a cleaning component, which includes a fixed bevel gear (807) fixed on the fixed shaft (801), an adjusting bevel gear (808) meshing with the fixed bevel gear (807), an eccentric wheel (803) driven by the adjusting bevel gear (808), and a push rod (805) cooperating with the eccentric wheel (803). One end of the push rod (805) is connected to a cleaning plate (802). When the fixed shaft (801) rotates, the fixed bevel gear (807) and the adjusting bevel gear (808) drive the eccentric wheel (803) to rotate, thereby pushing the push rod (805) and the cleaning plate (802) to reciprocate along the air outlet (9) for cleaning.

8. A power distribution box according to claim 7, characterized in that, The bottom surface of the cleaning plate (802) is provided with a cleaning brush, which is made of silicone and coated with Teflon coating.

9. A power distribution box according to claim 7, characterized in that, The top of the main body (1) of the power distribution box is fixed with a fixed rod (10) parallel to the fixed axis (801), and the cleaning plate (802) is slidably sleeved on the fixed rod (10) through the moving block (14). A reset spring (13) is sleeved on the fixed rod (10). The reset spring (13) acts on the moving block (14) to provide a reset force for the cleaning plate (802).

10. A method for heat dissipation and maintenance of a power distribution box, applied to the power distribution box as described in any one of claims 1 to 9, characterized in that, include: Start the heat dissipation mechanism (8) integrated on the main body (1) of the power distribution box, drive the heat dissipation component included in the heat dissipation mechanism (8) to move back and forth along the air outlet (9), and at the same time make the heat dissipation component work to perform forced air cooling heat dissipation inside the main body (1) of the power distribution box. When it is necessary to inspect and repair the electrical components on the mounting bracket (6), operate the maintenance mechanism (7) integrated on the main body (1) of the power distribution box, and use the maintenance mechanism (7) to drive the mounting bracket (6) to slide out of the main body (1) of the power distribution box as a whole.

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