Intelligent heat dissipation low-voltage distribution box suitable for standby power supply

Abstract

The utility model provides an intelligent heat dissipation low-voltage distribution box suitable for a standby power supply. The intelligent heat dissipation low-voltage distribution box comprises an electric box body, a cover plate, a PCB, an NTC thermistor and a plurality of piezoelectric fan units. The cover plate covers the top of the electric box body; a plurality of open holes matched with accessories of the PCB are formed in one side surface of the electric box body, and the accessories and the open holes are arranged in a one-to-one correspondence manner; the PCB is fixed on the bottom surface of the electric box body; the NTC thermistor is arranged in the electric box body, and the NTC thermistor is fixed on the side surface of the electric box body; the piezoelectric fan units are arranged in the electric box body, and the piezoelectric fan units and the NTC thermistors are oppositely arranged. Temperature collection and electric energy distribution can be combined, heat dissipation operation of the piezoelectric fan in a small space is regulated and controlled, protection elements are convenient to replace in a centralized mode, and maintenance and overhaul are convenient.

Description

Technical Field

[0001] The utility model belongs to the technical field of equipment, and in particular relates to an intelligent heat dissipation low-voltage distribution box suitable for a backup power supply. Background Art

[0002] The wiring harness at the system level needs to be centrally protected and easy to inspect and maintain. The distribution box is a very important device in the power system. It is usually composed of a housing, a circuit breaker, a fuse, a current transformer, etc. Its main function is to introduce the system power or controller signal from the power supply network to the electrical devices at each circuit end in the system. The distribution box can distribute power to different circuits according to demand, thereby achieving effective use of power and preventing damage or failure of electrical equipment caused by improper power distribution.

[0003] Some existing distribution boxes are equipped with current transformers, leakage protectors and other equipment to monitor circuit current and prevent safety issues such as fire caused by electrical equipment failure or circuit short circuit. Due to the limited current carrying capacity of the PCB board, when the large current energy distribution generates concentrated heat, it is in a sealed environment and cannot effectively dissipate heat, which can easily cause the cumulative temperature rise to be too high. Since the traditional fans used are large in size and the effective heating space of the highly integrated intelligent distribution box is low, the original detection methods and ideas cannot solve the above problems well. Although the existing distribution box can monitor current changes and perform corresponding protection actions, the long-term high temperature environment will cause the components to age, which is not conducive to the long-term stable and smooth operation of the system. Utility Model Content

[0004] The present invention provides an intelligent heat dissipation low-voltage distribution box suitable for backup power supply, aiming to solve the problems of existing traditional power distribution methods such as wasteful wiring, large size of distribution boxes, ineffective heat dissipation, aging of components, and problems in stable system operation.

[0005] In order to solve the above problems, the embodiment of the utility model provides an intelligent heat dissipation low-voltage distribution box suitable for a backup power supply, comprising an electrical box body, a cover plate, a PCB circuit board, an NTC thermistor and an array piezoelectric fan unit; the cover plate is covered on the top of the electrical box body; a plurality of openings adapted to the accessories of the PCB circuit board are arranged on one side surface of the electrical box body, and the accessories are arranged one by one corresponding to the openings;

[0006] The PCB circuit board is fixed on the bottom surface of the electrical box body; the NTC thermistor is arranged in the electrical box body, and the NTC thermistor is fixed on the side of the electrical box body; the array of piezoelectric fan units is arranged in the electrical box body, and the piezoelectric fan unit is arranged opposite to the NTC thermistor.

[0007] As a preferred implementation, a controller (FCU) is provided on the PCB circuit board, and the controller is connected to the NTC thermistor and the piezoelectric fan unit respectively.

[0008] As a preferred embodiment, each group of the piezoelectric fan units is fixed to the side surface inside the electrical box body through a fan fixing bracket.

[0009] As a preferred embodiment, the piezoelectric fan units in the arrays are symmetrically arranged with respect to each other; each group of the piezoelectric fan units includes a plurality of piezoelectric fans which are arranged in parallel with each other and at equal intervals.

[0010] As a preferred embodiment, a gap is provided between the PCB circuit board and the bottom surface of the electrical box body; and a plurality of holes are provided on the PCB circuit board for tinning. By providing the gap, the heat dissipation space can be effectively increased; by providing the holes for tinning, the heat dissipation area can be effectively increased, which is beneficial to the heat dissipation of the distribution box.

[0011] As a preferred embodiment, the PCB circuit board is provided with fixing columns at the end corners of the side surface close to the bottom surface of the electrical box body, and the PCB circuit board is fixed in the electrical box body through the fixing columns. The fixing columns can ensure the gap between the PCB circuit board and the electrical box body, and at the same time, the PCB circuit board is well fixed, which is convenient for the disassembly and assembly of the PCB circuit board.

[0012] As a preferred embodiment, a first fixing hole and a second fixing hole are provided on one side surface of the electrical box body, and the first fixing hole, the second fixing hole and the opening are all provided on the same side surface of the electrical box body; the first fixing hole and the second fixing hole are both provided above the opening, and the second fixing hole is provided close to the edge of the side surface.

[0013] As a preferred implementation, the aperture of the first fixing hole is smaller than the aperture of the second fixing hole; one end of the NTC thermistor is fixed to the first fixing hole, and the free end of the NTC thermistor is arranged close to the second fixing hole.

[0014] As a preferred implementation manner, the distance between the first fixing hole and the second fixing hole is equal to the length of the NTC thermistor.

[0015] As a preferred embodiment, a plurality of through holes for heat dissipation are further arranged on the side where the opening is located; the plurality of through holes are arranged at equal intervals; and the through holes are arranged above the first fixing hole.

[0016] As a preferred embodiment, a foot pad is provided at the end corner of the bottom of the electrical box body; the cover plate is a transparent cover plate, and the electrical box body can be fixed by the foot pad.

[0017] Compared with the prior art, the utility model has the following beneficial effects: by setting up NTC thermistors and piezoelectric fan units and connecting them to the controller, the utility model can achieve the effect of auxiliary temperature control in a smaller space, and improve the overall heat dissipation capacity of the distribution box during long-term operation; and by uniformly distributing power through the controller, it can realize the combination of intelligent algorithms and power distribution protection, thereby effectively improving the efficiency of the system. Through the structure of the utility model, it is possible to realize the combination of temperature acquisition and power distribution, regulate the heat dissipation operation of the piezoelectric fan in a small space, facilitate centralized replacement of protection components, facilitate maintenance and repair, and solve the problems of wasteful wiring and excessive volume of the distribution box in the original traditional power distribution method. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0019] Figure 1 It is a schematic diagram of the overall structure of an intelligent heat dissipation low-voltage distribution box suitable for a backup power supply according to an embodiment of the present application;

[0020] Figure 2 yes Figure 1 Schematic diagram of the internal structure of the intelligent heat dissipation low-voltage distribution box;

[0021] Figure 3 yes Figure 1 Schematic diagram of the exploded structure of the intelligent heat dissipation low-voltage distribution box;

[0022] Figure 4 yes Figure 1 Schematic diagram of temperature control topology of intelligent heat dissipation low-voltage distribution box;

[0023] Figure 5 yes Figure 1 Experimental test diagram of the heat dissipation effect of the intelligent heat dissipation low-voltage distribution box. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, top, bottom...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0026] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0027] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element at the same time.

[0028] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0029] Specifically, Figures 1 to 3 As shown, the embodiment of the utility model proposes an intelligent heat dissipation low-voltage distribution box suitable for a backup power supply, comprising an electric box body 10, a cover plate 20, a PCB circuit board 30, an NTC thermistor 40 and an array piezoelectric fan unit 50; the cover plate 20 covers the top of the electric box body 10; a plurality of openings 11 adapted to the accessories 31 of the PCB circuit board 30 are arranged on one side of the electric box body 10, and the accessories 31 are arranged one by one with the openings 11;

[0030] The PCB circuit board 30 is fixed on the bottom surface of the electrical box body 10; the NTC thermistor 40 is arranged in the electrical box body 10, and the NTC thermistor 40 is fixed on the side of the electrical box body 10; the array of piezoelectric fan units 50 is arranged in the electrical box body 10, and the piezoelectric fan unit 50 is arranged opposite to the NTC thermistor 40.

[0031] As a preferred embodiment, a controller 32 (FCU) is disposed on the PCB circuit board 30 , and the controller 32 is connected to the NTC thermistor 40 and the piezoelectric fan unit 50 respectively.

[0032] As a preferred embodiment, each group of the piezoelectric fan units 50 is fixed to the side surface inside the electrical box body 10 via a fan fixing bracket 51 .

[0033] As a preferred embodiment, the piezoelectric fan units 50 of the groups are symmetrically arranged with respect to each other; each group of the piezoelectric fan units 50 includes a plurality of piezoelectric fans 52 which are arranged in parallel with each other and at equal intervals.

[0034] As a preferred embodiment, a gap (not marked in the figure) is provided between the PCB circuit board 30 and the bottom surface of the electrical box body 10; a plurality of holes for tinning (not marked in the figure) are provided on the PCB circuit board 30. By providing the gap, the heat dissipation space can be effectively increased; by providing the holes for tinning, the heat dissipation area can be effectively increased, which is beneficial to the heat dissipation of the distribution box. Figure 4 It is a schematic diagram of the temperature control topology of the intelligent heat dissipation low-voltage distribution box in the embodiment of the present application; Figure 5 This is a test diagram of the heat dissipation effect of the intelligent heat dissipation low-voltage distribution box of the embodiment of the present application. Figure 4 and Figure 5 It can be seen that the structure of the present application has a good heat dissipation effect.

[0035] As a preferred embodiment, the PCB circuit board 30 is provided with a fixing column 60 at the end corner of the side surface close to the bottom surface of the electrical box body 10, and the PCB circuit board 30 is fixed in the electrical box body 10 through the fixing column 60. Through the fixing column 60, the gap between the PCB circuit board 30 and the electrical box body 10 can be ensured, and the PCB circuit board 30 is well fixed, which is convenient for the disassembly and assembly of the PCB circuit board 30.

[0036] As a preferred embodiment, a first fixing hole 12 and a second fixing hole 13 are provided on one side surface of the electrical box body 10, and the first fixing hole 12, the second fixing hole 13 and the opening 11 are all provided on the same side surface of the electrical box body 10; the first fixing hole 12 and the second fixing hole 13 are both provided above the opening 11, and the second fixing hole 13 is provided close to the edge of the side surface.

[0037] As a preferred embodiment, the aperture of the first fixing hole 12 is smaller than the aperture of the second fixing hole 13 ; one end of the NTC thermistor 40 is fixed to the first fixing hole 12 , and the free end of the NTC thermistor 40 is arranged close to the second fixing hole 13 .

[0038] As a preferred embodiment, the distance between the first fixing hole 12 and the second fixing hole 13 is equal to the length of the NTC thermistor 40 .

[0039] As a preferred embodiment, a plurality of through holes 14 for heat dissipation are further provided on the side where the opening 11 is located; the plurality of through holes 14 are arranged at equal intervals; and the through holes 14 are provided above the first fixing hole 12 .

[0040] As a preferred embodiment, a foot pad 70 is provided at the end corner of the bottom of the electrical box body 10; the cover plate 20 is a transparent cover plate. The electrical box body 10 can be fixed by the foot pad 70.

[0041] The structure of the present application adopts relatively concentrated connectors and safety protection elements, which can reduce the use of wiring harnesses, and achieve a reduction in wiring harness nodes, a reduction in wire usage, and a reduction in costs based on replaceable relays and fuses.

[0042] The piezoelectric fan used has the advantages of low noise, low consumption, and simple structure. It has great application prospects in forced convection heat exchange and in occasions with high requirements for human interaction performance. It can achieve auxiliary heat dissipation in a relatively small integrated distribution box. It has a high degree of fit and can cope with extreme environments, improve aging caused by excessive cumulative temperature rise, and ensure electricity safety.

[0043] The main function of the power distribution box of this application is to distribute the power at the input end to each power-consuming device according to the power demand of the low-voltage device of the fuel cell system to meet the system usage requirements. The power distribution box of this application can be connected to the main contactor coil, and the negative foot LSD is controlled by the main contactor coil to pull the internal control of the controller down to GND, controlling the relay to be attracted.

[0044] The above description is only a preferred embodiment of the utility model, and does not limit the patent scope of the utility model. All equivalent structural changes made by using the contents of the utility model specification and drawings under the utility model concept, or directly / indirectly used in other related technical fields are included in the patent protection scope of the utility model.

Claims

1. An intelligent heat dissipation low-voltage distribution box suitable for backup power supply, characterized in that: The electric box comprises an electric box body, a cover plate, a PCB circuit board, an NTC thermistor and an array piezoelectric fan unit; the cover plate is covered on the top of the electric box body; a plurality of openings adapted to the accessories of the PCB circuit board are arranged on one side of the electric box body, and the accessories are arranged one by one corresponding to the openings; The PCB circuit board is fixed on the bottom surface of the electrical box body; the NTC thermistor is arranged in the electrical box body, and the NTC thermistor is fixed on the side of the electrical box body; the array of piezoelectric fan units is arranged in the electrical box body, and the piezoelectric fan unit is arranged opposite to the NTC thermistor.

2. The intelligent heat dissipation low-voltage distribution box suitable for backup power supply according to claim 1 is characterized in that: A controller is arranged on the PCB circuit board, and the controller is connected to the NTC thermistor and the piezoelectric fan unit respectively.

3. The intelligent heat dissipation low-voltage distribution box suitable for backup power supply according to claim 2 is characterized in that: Each group of the piezoelectric fan units is fixed on the side surface inside the electrical box body through a fan fixing frame.

4. The intelligent heat dissipation low-voltage distribution box suitable for backup power supply according to claim 3 is characterized in that: The piezoelectric fan units in the array are symmetrically arranged with respect to each other; each group of the piezoelectric fan units comprises a plurality of piezoelectric fans which are arranged in parallel with each other and at equal intervals.

5. The intelligent heat dissipation low-voltage distribution box suitable for backup power supply according to claim 4 is characterized in that: A gap is arranged between the PCB circuit board and the bottom surface of the electrical box body; and a plurality of hole points for tinning are arranged on the PCB circuit board.

6. The intelligent heat dissipation low-voltage distribution box suitable for backup power supply according to claim 5, characterized in that: The PCB circuit board is provided with fixing columns on the end corners of the side surfaces close to the bottom surface of the electrical box body, and the PCB circuit board is fixed in the electrical box body through the fixing columns.

7. The intelligent heat dissipation low-voltage distribution box suitable for backup power supply according to claim 6, characterized in that: A first fixing hole and a second fixing hole are provided on one side surface of the electrical box body, and the first fixing hole, the second fixing hole and the opening are all provided on the same side surface of the electrical box body; the first fixing hole and the second fixing hole are both provided above the opening, and the second fixing hole is provided close to the edge of the side surface.

8. The intelligent heat dissipation low-voltage distribution box suitable for backup power supply according to claim 7, characterized in that: The aperture of the first fixing hole is smaller than the aperture of the second fixing hole; one end of the NTC thermistor is fixed on the first fixing hole, and the free end of the NTC thermistor is arranged close to the second fixing hole.

9. The intelligent heat dissipation low-voltage distribution box suitable for backup power supply according to claim 8, characterized in that: The distance between the first fixing hole and the second fixing hole is equal to the length of the NTC thermistor.

10. The intelligent heat dissipation low-voltage distribution box suitable for backup power supply according to claim 9, characterized in that: A plurality of through holes for heat dissipation are also arranged on the side where the opening is located; the plurality of through holes are arranged at equal intervals; the through holes are arranged above the first fixing hole; The end corners of the bottom of the electrical box body are provided with foot pads; and the cover plate is a transparent cover plate.

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