CN215300476U

CN215300476U - Switch power supply

Info

Publication number: CN215300476U
Application number: CN202121550779.6U
Authority: CN
Inventors: 王力
Original assignee: Xiamen Hailange Electric Co ltd
Current assignee: Xiamen Hailange Electric Co ltd
Priority date: 2021-07-08
Filing date: 2021-07-08
Publication date: 2021-12-24
Anticipated expiration: 2031-07-08

Abstract

The utility model relates to a power technical field relates to a switching power supply especially. The utility model discloses a switching power supply, including the casing and set up the PCB board in the casing, be equipped with switching power supply circuit on the PCB board, still including compressing tightly the piece, the casing is the casing of heat conduction, and the power device on the PCB board compresses tightly on the inside wall of casing and carries out the thermal contact through compressing tightly the piece. The utility model discloses a power device's radiating effect is good, has promoted circuit job stabilization nature, reliability and efficiency, has prolonged life.

Description

Switch power supply

Technical Field

The utility model belongs to the technical field of the power, specifically relate to a switching power supply.

Background

The switch power supply is a power supply which utilizes the modern power electronic technology to control the time proportion of the on and off of a switch tube and maintain stable output voltage. The switching power supply has the advantages of simple structure, small size, light weight, high efficiency and convenience in use, and is widely applied to the fields of industrial automation control, military equipment, scientific research equipment, LED illumination, industrial control equipment, communication equipment, power equipment, computer cases, digital products and the like.

Switching power supply is at the working process, because the existence of power device (mainly be the switch tube, like MOS pipe or IGBT pipe, some switching power supply still include the schottky diode), can produce great heat, consequently, current switching power supply all can be provided with heat radiation structure and dispel the heat, avoids the heat accumulation to lead to the high temperature and influence the normal work of circuit, makes the circuit damage even. However, the heat dissipation effect of the power device of the conventional switching power supply needs to be further improved.

Disclosure of Invention

An object of the utility model is to provide a switching power supply is used for solving the above-mentioned technical problem who exists.

In order to achieve the above object, the utility model adopts the following technical scheme: the utility model provides a switching power supply, includes the casing and sets up the PCB board in the casing, is equipped with switching power supply circuit on the PCB board, still includes and compresses tightly the piece, and the casing is heat-conducting casing, and the power device on the PCB board compresses tightly on the inside wall of casing and carries out the thermal contact through compressing tightly the piece.

Further, the power device comprises a MOS tube and a Schottky diode.

Furthermore, the MOS tube and the Schottky diode are respectively pressed on the first inner side wall and the second inner side wall of the shell body.

Furthermore, the first inner side wall and the second inner side wall are respectively provided with an installation groove, and two side edges of the PCB are respectively detachably inserted into the installation grooves and installed in the shell.

Furthermore, the PCB fixing device further comprises a fixing screw which is locked on the bottom of the shell and the PCB so as to fix the PCB.

Furthermore, the PCB connector further comprises an insulating sheet which is arranged between the PCB and the bottom of the shell and is fixed on the fixing screws in a penetrating mode.

Furthermore, the pressing piece is of an L-shaped structure, and the power device is tightly pressed on the inner side wall of the shell through the locking and fixing of the screw and the side wall of the shell.

Further, the shell is made of an aluminum alloy material.

Further, the shell comprises a lower shell and an upper cover, and the lower shell and the upper cover are fixed through screw locking.

Furthermore, the upper cover is provided with a plurality of radiating long holes.

The utility model has the advantages of:

the utility model discloses a compress tightly the piece and compress tightly power device on the inside wall of casing and carry out good thermal contact for power device has good radiating effect, thereby has promoted stability, reliability and the efficiency of circuit work, has prolonged life.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a block diagram of an embodiment of the present invention;

FIG. 2 is a block diagram of another perspective of an embodiment of the present invention;

FIG. 3 is a block diagram of another perspective of an embodiment of the present invention;

FIG. 4 is a view showing the structure of the present invention without the upper cover;

FIG. 5 is a view showing another perspective of the present invention with the upper cover omitted;

FIG. 6 is a view showing the structure of the lower case and the insulation sheet according to the embodiment of the present invention;

fig. 7 is a partially exploded view of an embodiment of the present invention.

Detailed Description

To further illustrate the embodiments, the present invention provides the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the embodiments. With these references, one of ordinary skill in the art will appreciate other possible embodiments and advantages of the present invention. Elements in the figures are not drawn to scale and like reference numerals are generally used to indicate like elements.

The present invention will now be further described with reference to the accompanying drawings and detailed description.

As shown in fig. 1 to 7, a switching power supply includes a housing 1 and a PCB 2 disposed in the housing 1, a switching power supply circuit is disposed on the PCB 2, and the switching power supply further includes a pressing member 3, the housing 1 is a heat-conductive housing, and a power device on the PCB 2 is pressed on an inner side wall of the housing 1 by the pressing member 3 to be in thermal contact with the power device.

In this embodiment, the switching power supply circuit may be any of various existing switching power supply circuits, such as an isolated switching power supply circuit or a non-isolated switching power supply circuit, and specifically, reference may be made to the prior art, which can be easily implemented by those skilled in the art, and thus, the details are not described.

Preferably, in this embodiment, the housing 1 is made of an aluminum alloy material, which not only has a good heat dissipation effect, but also has a light weight and a good structural strength, but is not limited thereto, and in some embodiments, the housing 1 may also be made of other heat conductive materials.

In this embodiment, the housing 1 includes a lower housing 11 and an upper housing 12, and the lower housing 11 and the upper housing 12 are fastened and fixed by screws, which is not only easy to assemble and maintain, but also has good stability, but in some embodiments, the lower housing 11 and the upper housing 12 may also be fixed by other fixing structures, such as adhesion, clamping, etc.

In this embodiment, the lower case 11 has a square structure, and includes a rectangular bottom 111, a first sidewall 112 and a second sidewall 113, the first sidewall 112 and the second sidewall 113 are oppositely disposed on the left and right sides of the bottom 111 (using fig. 6 as a direction reference), and the top and the front and rear sidewalls of the lower case 11 are disposed in an opening manner.

The power device is a power device used in a switching power supply circuit, and in this specific embodiment, the power device includes a MOS transistor 4 and a schottky diode 5, but is not limited thereto, and in some embodiments, the power device may include only a MOS transistor, or an IGBT transistor, without a schottky diode or the like.

Preferably, in this embodiment, the MOS transistor 4 and the schottky diode 5 are respectively pressed on the inner surfaces of the first sidewall 112 and the second sidewall 113, so as to further improve the heat dissipation effect, and accordingly, the MOS transistor 4 and the schottky diode 5 are required to be disposed on the left and right edges of the PCB 2. But not limited thereto, in some embodiments, the MOS transistor 4 and the schottky diode 5 may be pressed against the inner surface of the same sidewall at the same time.

Preferably, in this embodiment, the pressing member 3 is an L-shaped structure, the number of the pressing member is 2, the MOS transistor 4 and the schottky diode 5 are respectively pressed against the first sidewall 112 and the second sidewall 113 by the screws 31 being locked and fixed with the first sidewall 112 and the second sidewall 113, specifically, the end face of the first end portion of the pressing member 3 abuts against the first sidewall 112 or the second sidewall 113, the side face of the second end portion presses against the MOS transistor 4 or the schottky diode 5, and the pressing member 3 is locked and fixed with the first sidewall 112 and the second sidewall 113 by the screws 31 to press the MOS transistor 4 and the schottky diode 5 against the first sidewall 112 and the second sidewall 113. Adopt this 3 structures of compressing tightly, compress tightly effectually, promote the radiating effect, and simple structure, easily assembly etc.. However, the present invention is not limited to this, and in some embodiments, the pressing member 3 may have another structure as long as the MOS transistor 4 and the schottky diode 5 can be pressed against the first sidewall 112 and the second sidewall 113.

In this embodiment, pressing member 3 adopts the aluminum alloy material to make, not only further promotes the radiating effect, and light in weight, structural strength is good, but is not limited to this, and in some embodiments, pressing member 3 also can adopt other heat conduction materials to make.

Further, in this embodiment, the first inner sidewall 112 and the second inner sidewall 113 are respectively provided with a mounting groove 6 penetrating through the front end and the rear end, the left side and the right side of the PCB 2 are respectively detachably inserted into the mounting groove 6 and mounted in the lower case 11, and the front of the PCB 2 faces upward. Through setting up mounting groove 6 for PCB board 2 assembles more conveniently.

In this embodiment, still include set screw 7, set screw 7 locks on bottom 111 of inferior valve 11 and PCB board 2 and fix PCB board 2, and set screw 7 passes bottom 111 of inferior valve 11 and locks with PCB board 2 promptly to fix PCB board 2 in inferior valve 11, be convenient for assemble and maintain.

Further, in this embodiment, still include insulating piece 8, insulating piece 8 sets up between bottom 111 of PCB board 2 and inferior valve 11 to wear to establish and fix on set screw 7, further improve insulating effect, thereby improve security and reliability, and easily assemble.

The insulating sheet 8 may be made of polyethylene terephthalate (PET), polypropylene (PP), Polycarbonate (PC), polyvinyl chloride (PVC), or the like.

The upper cover 12 covers the lower shell 11 and leaves the wiring connector 9 arranged on the PCB board 2, so that the wiring is convenient for subsequent use.

Further, in this embodiment, the upper cover 12 is provided with a plurality of heat-dissipating elongated holes 121, so as to further improve the internal heat-dissipating effect, thereby improving the stability, reliability and efficiency of the circuit operation, and prolonging the service life.

The utility model discloses a compress tightly the piece and compress tightly power device on the inside wall of casing and carry out the thermal contact for power device has good radiating effect, thereby has promoted stability, reliability and the efficiency of circuit work, has prolonged life.

While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. The utility model provides a switching power supply, includes the casing and sets up the PCB board in the casing, is equipped with switching power supply circuit on the PCB board, its characterized in that: the PCB power device further comprises a pressing piece, the shell is a heat-conducting shell, and the power device on the PCB is pressed on the inner side wall of the shell through the pressing piece to be in thermal contact with the shell.

2. The switching power supply according to claim 1, characterized in that: the power device comprises an MOS tube and a Schottky diode.

3. The switching power supply according to claim 2, characterized in that: the MOS tube and the Schottky diode are respectively pressed on a first inner side wall and a second inner side wall of the shell in an opposite mode.

4. The switching power supply according to claim 3, characterized in that: the first inner side wall and the second inner side wall are respectively provided with a mounting groove, and two side edges of the PCB are respectively detachably inserted in the mounting grooves and are mounted in the shell.

5. The switching power supply according to claim 4, wherein: the PCB fixing device further comprises a fixing screw which is locked on the bottom of the shell and the PCB to fix the PCB.

6. The switching power supply according to claim 5, wherein: still include the insulating piece, the insulating piece setting is between the bottom of PCB board and casing to wear to establish and fix on the set screw.

7. The switching power supply according to claim 1, characterized in that: the pressing piece is of an L-shaped structure, and the power device is tightly pressed on the inner side wall of the shell through screws and the side wall of the shell in a locking and fixing mode.

8. The switching power supply according to claim 1, characterized in that: the shell is made of an aluminum alloy material.

9. The switching power supply according to claim 1, characterized in that: the shell comprises a lower shell and an upper cover, and the lower shell and the upper cover are fixed through screw locking.

10. The switching power supply according to claim 9, wherein: the upper cover is provided with a plurality of radiating long holes.