CN203733570U

CN203733570U - Heat dissipation device of high-frequency switching mode power supply transformer

Info

Publication number: CN203733570U
Application number: CN201420115135.8U
Authority: CN
Inventors: 李微; 林木松; 向晋星
Original assignee: SHENZHEN PLUCKYSTONE TECHNOLOGIES Co Ltd
Current assignee: SHENZHEN PLUCKYSTONE TECHNOLOGIES Co Ltd
Priority date: 2014-03-13
Filing date: 2014-03-13
Publication date: 2014-07-23
Anticipated expiration: 2024-03-13

Abstract

The utility model discloses a heat dissipation device of a high-frequency switching mode power supply transformer. The heat dissipation device comprises a transformer framework, a ferrite magnetic core and a coil, wherein the ferrite magnetic core is arranged on the transformer framework, and the coil is wound on the transformer framework; the heat dissipation device is characterized by also comprising metal cooling fins, wherein one end of each metal cooling fin is a heat conducting end, each metal cooling fin is arranged between the transformer framework and the coil and is respectively in contact with the transformer framework and the coil for conducting heat at the inner part of the coil, and the other end of the metal cooling fin is a heat dissipation end and stretches to the outer sides of the transformer framework and the coil for conducting the heat outside the coil to be dissipated. According to the heat dissipation device of the high-frequency switching mode power supply transformer, disclosed by the utility model, through arranging the metal cooling fins between the coil and the transformer framework, the heat at the inner part of the coil is conducted outside the coil by utilizing the good heat conductivity of the metal cooling fins, thus the internal temperature of the transformer can be effectively reduced, the electrical safety of the transformer can be increased, and the service life can be prolonged; in addition, the heat dissipation device has the characteristics that the structure is simple, convenience and practicality are obtained, and the implementation is easy; the heat dissipation device is suitable for being vigorously promoted.

Description

The heat abstractor of high-frequency switch power transformer

[technical field]

The utility model relates to transformer, particularly a kind of heat abstractor of the high-frequency switch power transformer of being convenient to heat radiation.

[background technology]

Because switching frequency is high and the existence of kelvin effect, there is the problem of coil heat accumulation, cooling deficiency in the high-frequency switch power transformer of electronics industry always.For ensureing that transformer carries out work safely and reliably, just must select larger magnetic core framework, therefore cause the cost of transformer and volume to increase.In order not increase magnetic core framework, general way has two kinds at present: one is to utilize fan to strengthen the convection current of transformer surrounding air, to force air cooling; Another kind is that transformer entirety is positioned in metal shell, and between it, pours into a mould heat conductive silica gel to strengthen heat conduction efficiency.Above-mentioned these two kinds of methods can only be carried out cooling to transformer outside, and transformer inside particularly the heat of coil inside still can not effectively be led away, it still can be accumulated, thereby causes transformer internal temperature to raise, and then affects the functional reliability of transformer.In addition, the second way also can increase the cost of transformer greatly.

[utility model content]

The utility model is intended to address the above problem and provides one can improve coil inside dissipation of heat, thereby prevents the heat abstractor of the high-frequency switch power transformer that the too high guarantee of coil inside working temperature transformer electric property is stable.

For achieving the above object, the utility model provides a kind of heat abstractor of high-frequency switch power transformer, it comprises transformer framework and is located at the FERRITE CORE on transformer framework and is wound in the coil on transformer framework, it is characterized in that, this heat abstractor also comprises metal fin, one end of this metal fin is heat conduction end, it is located between transformer framework and coil, and contact and the heat of conductive coil inside with it respectively, the other end of this metal fin is radiating end, it extend out to the outside of transformer framework and coil and heat is exported to coil and distributes outward.

The radiating end of described metal fin is provided with spaced fin-shaped sheet.

Described metal fin is L-type, and it is formed by connecting by orthogonal metallic plate one.

One end at described transformer framework is provided with metal pins, the heat conduction end of described metal fin is inserted between transformer framework and coil, the radiating end of described metal fin is extended by the heat conduction end end that deviates from metal pins, and with heat conduction end perpendicularly outward extend.

Described fin-shaped sheet and metal fin are one-body molded, and a side surface that deviates from metal pins of radiating end is located at its interval.

Between described transformer framework and coil, be arranged with two metal fins.

Described metal fin is the fin being made of aluminum or copper.

Useful contribution of the present utility model is, it efficiently solves the problems referred to above.The utility model by arranging metal fin between coil and transformer framework, utilize the thermal conductive resin of metal fin and the heat of coil inside is exported to outside coil, thereby effectively reduce transformer internal temperature, improve the electrical security of transformer, and increase the service life.In addition, the utlity model has feature simple in structure, convenient and practical, easy to implement, should widely popularize.

[brief description of the drawings]

Fig. 1 is structural representation of the present utility model;

Fig. 2 is the structural representation of metal fin of the present utility model.

Wherein, transformer framework 1, metal pins 11, FERRITE CORE 2, coil 3, metal fin 4, heat conduction end 41, radiating end 42, fin-shaped sheet 43.

[embodiment]

The following example is to further explanation of the present utility model and supplements, the utility model is not constituted any limitation.

As shown in Figure 1 and Figure 2, the heat abstractor of high-frequency switch power transformer of the present utility model comprises transformer framework 1, FERRITE CORE 2, coil 3 and metal fin 4, main inventive point of the present utility model is, between transformer framework 1 and coil 3, metal fin 4 is set, utilize the thermal conductive resin of metal fin 4 and the heat of coil 3 inside is exported to outside coil 3, thereby realizing the object that reduces transformer internal temperature.

Specifically, as shown in Figure 1, described transformer framework 1 is used to coil 3 to provide and is wound around space, and fixing FERRITE CORE 2.In the present embodiment, described transformer framework 1, FERRITE CORE 2, coil 3 can be selected known structure, for example, as shown in Figure 1, the rectangular framework of described FERRITE CORE 2, it is sheathed on described transformer framework 1, and this FERRITE CORE 2 can be connected by known mode with transformer framework 1 support.Described coil 3 is wound on described transformer framework 1.Be provided with metal pins 11 in one end of described transformer framework 1, it connects for the time conduction of working.Distribute, prevent coil 3 internal work excess Temperatures for improving coil 3 internal heat, between described coil 3 and transformer framework 1, be provided with metal fin 4.In the present embodiment, be arranged with two metal fins 4 between coil 3 and transformer framework 1, this metal fin 4 lays respectively at the both sides of described FERRITE CORE 2.It should be noted that; the structure of described high-frequency switch power transformer is not limited to shown in Fig. 1; for difform transformer framework 1; the set-up mode of its FERRITE CORE 2 and coil 3 may be different; but no matter the shape of transformer framework 1, FERRITE CORE 2 and coil 3 how; as long as carrying out heat conduction by one end of metal fin 4 being stretched to coil 3 inside; one end extend out to coil 3 outsides and dispels the heat; it all belongs to inventive concept of the present utility model, within it all falls into protection range of the present utility model.Metal fin 4 of the present utility model can be arranged to difformity according to the difformity of transformer framework 1, FERRITE CORE 2, and can arrange as required one or more.

In the present embodiment, as shown in Figure 2, described metal fin 4 is L-type, and it is formed by connecting by orthogonal metallic plate one.One end of this metal fin 4 is heat conduction end 41, and it is inserted between described coil 3 and transformer framework 1, and contacts with coil 3 and transformer framework 1 respectively, thus the heat can conductive coil 3 inside gathering.The other end of described metal fin 4 is radiating end 42, and it is stretched out by heat conduction end 41 ends that deviate from metal pins 11, and with heat conduction end 41 perpendicularly outward extend form.The radiating end 42 of described metal fin 4 extend out to the outside of transformer framework 1 and coil 3 and heat can be exported to coil 3 is outer to be distributed.For better making dissipation of heat to coil 3, on the radiating end 42 of described metal fin 4, be provided with spaced fin-shaped sheet 43, this fin-shaped sheet 43 is one-body molded with described metal fin 4, and be positioned on a side surface that deviates from metal pins 11 of golden radiating end 42, thereby can prevent that according to rising principle heat disturbance is to heat conduction end 41, and then can accelerating coil 3 internal heat distribute, to ensure that transformer electric property is stable.

Described metal fin 4 can be made up of the metal material of heat conductivility excellence, and in the present embodiment, this metal fin 4 can be selected common aluminum or copper metal fin 4, both can reach the utility model object, can reduce costs again.

While making high-frequency switch power transformer of the present utility model, only need before winding around 3, first metal fin 4 be installed on transformer framework 1, and then carry out 3 coilings of conventional transformer coil.

By this, the utility model by arranging metal fin 4 between coil 3 and transformer framework 1, utilize the heat conductivility that metal fin 4 is good, the heat of coil 3 inside is exported to outside coil 3, thereby can accelerating coil 3 internal heat distribute, reduce coil 3 internal work temperature, realize the purpose of this utility model.It is high that high-frequency switch power transformer of the present utility model not only has security performance, and long working life, and production cost is low, and practicality is high, should widely popularize.

Claims

1. the heat abstractor of a high-frequency switch power transformer, it comprises transformer framework (1) and is located at the FERRITE CORE (2) on transformer framework (1) and is wound in the coil (3) on transformer framework (1), it is characterized in that, this heat abstractor also comprises metal fin (4), one end of this metal fin (4) is heat conduction end (41), it is located between transformer framework (1) and coil (3), and contact and the inner heat of conductive coil (3) with it respectively, the other end of this metal fin (4) is radiating end (42), it extend out to the outside of transformer framework (1) and coil (3) and heat is exported to outside coil (3) and distributed.

2. the heat abstractor of high-frequency switch power transformer as claimed in claim 1, is characterized in that, the radiating end (42) of described metal fin (4) is provided with spaced fin-shaped sheet (43).

3. the heat abstractor of high-frequency switch power transformer as claimed in claim 2, is characterized in that, described metal fin (4) is L-type, and it is formed by connecting by orthogonal metallic plate one.

4. the heat abstractor of high-frequency switch power transformer as claimed in claim 3, it is characterized in that, be provided with metal pins (11) in one end of described transformer framework (1), the heat conduction end (41) of described metal fin (4) is inserted between transformer framework (1) and coil (3), the radiating end (42) of described metal fin (4) by deviate from metal pins (11) heat conduction end (41) end extend, and with heat conduction end (41) perpendicularly outward extend.

5. the heat abstractor of high-frequency switch power transformer as claimed in claim 4, is characterized in that, described fin-shaped sheet (43) is one-body molded with metal fin (4), and a side surface that deviates from metal pins (11) of radiating end (42) is located at its interval.

6. the heat abstractor of high-frequency switch power transformer as claimed in claim 5, is characterized in that, between described transformer framework (1) and coil (3), is arranged with two metal fins (4).

7. the heat abstractor of high-frequency switch power transformer as claimed in claim 6, is characterized in that, described metal fin (4) is the fin being made of aluminum or copper.