CN206118253U - Electrical apparatus - Google Patents

Abstract

The utility model discloses an electrical apparatus, include: and a housing. The circuit board is equipped with printed circuit, the power component, production of heat when the circular telegram, lead heat -insulating material for the produced heat of conduction power component, heat -insulating material looses for the produced heat of dissipation power component, wherein, circuit board, power component, heat guiding element set up in the shell, the circuit board constitutes electrically conductive the connection with the power component, the power component with lead heat -insulating material and constitute heat conduction and be connected, it is connected with the heat conduction of scattered heat -insulating material constitution to lead heat -insulating material, the heat -insulating material that looses sets up between circuit board and scattered heat -insulating material. The utility model has the beneficial effects of: can dispel the heat by the hot part of effectual messenger electrical apparatus, carry high heat dissipation efficiency.

Description

Electric device

Technical field

This utility model is related to electric device.

Background technology

Moore's Law is pointed out：The performance of electronic product was doubled per 18 months.Therefore the power consumption of chip necessarily increases therewith Greatly, the heat consumption of generation is also increasing.Simultaneously with the development of microelectron-mechanical, increasing electronic devices and components are packaged in In less space.The heat consumption which results in electronic device is increasing and package dimension is less and less, therefore unit plane Heat flow density in product is increasing, and the heat flow in unit volume is also increasing.If what heat cannot be instant scatters away, its Temperature more and more higher.

Research and practical application show：55% electronic equipment failure is caused by temperature is too high, single semiconductor element Temperature often raise 10 degree, the reliability of system will reduce by 50 %.Therefore the higher stability of electronic product needs good dissipating Hot means are ensureing.Effectively cooling measure is to ensure that electronic product is safe and stable, reliability Work premise.

For the electric devices such as charger, its power device caloric value greatly, especially for being applied to electricity It is even more so for charger in power driven tools field, because the appearance of electric tool its battery bag for being used for continuous firing Amount is larger, therefore the charger for charging for it its internal caloric value when charging is considerable, and existing heat sink conception is setting Put and remain a need on the basis of fin configuration fan to carry out air blast cooling, radiating effect could be realized.This can make whole machine cost Increase, reliability is reduced, and brings the puzzlement of noise.

Utility model content

To solve the deficiencies in the prior art, the purpose of this utility model is to provide a kind of not against air-cooled electric dress Put.

In order to realize above-mentioned target, this utility model is adopted the following technical scheme that：

A kind of electric device, including：Shell；Circuit board, is provided with printed circuit；Power component, when being powered heat is produced； Heat-conducting piece, for the heat produced by conducted power element；Radiating piece, near produced by dissipated power element at shell Heat；Wherein, circuit board, power component, heat conducting element are arranged in shell；Circuit board constitutes conductive company with power component Connect；Power component constitutes heat conduction and is connected with heat-conducting piece；Heat-conducting piece constitutes heat conduction and is connected with radiating piece；Radiating piece is arranged on circuit board And radiating piece between.

Further, the resilient conductive filler body of tool is provided between heat-conducting piece and power component.

Further, the resilient conductive filler body of tool is provided between heat-conducting piece and radiating piece.

Further, heat-conducting piece includes：Extension, extends approximately along the direction of perpendicular circuit board；Extension and power component It is fixedly connected.

Further, heat-conducting piece includes：Kink, extends approximately along the direction parallel to circuit board；Kink and radiating piece It is fixedly connected.

Further, radiating piece arranges inside the housing or exposes shell；Power component is arranged on the space of shell composition Or in the space that collectively forms of shell and radiating piece.

Further, radiating piece has：First plate face, extends approximately along the direction parallel to circuit board；Second plate face, substantially Extend along the direction parallel to circuit board；First plate face and the second plate face are respectively arranged at the relative both sides of radiating piece；Second plate Face is arranged between the first plate face and heat-conducting piece.

Further, the span of projected area of the radiating piece in circuit board surface and board area ratio be more than 2 are less than or equal to equal to 0.3.

Further, electric device is charger；Power component is power semiconductor.

Further, charger also includes：Transformator, constitutes with circuit board and is conductively connected；Transformator is constituted with radiating piece and led Thermally coupled.

It is of the present utility model to be beneficial in that：The part radiating that electric device is warmmer can be effectively made, radiating is improved Efficiency.

Description of the drawings

Fig. 1 is the structural representation of a charger；

Fig. 2 is charger internal structural representation shown in Fig. 1；

Fig. 3 is the schematic diagram at another visual angle of structure shown in Fig. 2；

Fig. 4 is that the dimensional structure diagram after radiating piece is removed in Fig. 2；

Fig. 5 is dimensional structure diagram of the part from another visual angle shown in Fig. 4；

Fig. 6 is the dimensional structure diagram in Fig. 2 after removing circuit plate；

Fig. 7 is the structural representation of heat-conducting piece another embodiment.

Specific embodiment

Make specific introduction to this utility model below in conjunction with the drawings and specific embodiments.

Charger 100 as shown in Figure 1 as this utility model electric device a preferred embodiment, the charger 100 include：Shell 10 and setting enclosure electronic component.

Specifically, as shown in Figures 2 to 6, charger also 100 also includes：Circuit board 20, power component 31, heat-conducting piece 41 and radiating piece 50.

Wherein, circuit board 20 is provided with printed circuit, and it is used to connect such as resistance, electric capacity and corresponding semiconductor element To realize the function of charger 100.

Power component 31 can produce heat when it is powered, and specifically, its caloric value is more than or equal to 0.4W/cm²Or Power is more than 2W, and it constitutes with circuit board 20 and is conductively connected.In charger 100, multiple power components 31,32 can be provided with, More specifically, power component 31,32 can be power semiconductor, such as field effect transistor etc., and they can be by being provided with Leg is soldered to circuit board 20.

Heat-conducting piece 41 is used to transmit heat, and radiating piece 50 is used for heat dissipation.Specifically, power component 31 and heat-conducting piece 41 constitute heat conduction connection, and heat-conducting piece 41 constitutes heat conduction and is connected with radiating piece 50 again.When power component 31 produces heat, heat conduction unit 41 are radiated heat transfer radiating piece 50, then radiating piece 50 to air or other media.Heat-conducting piece 41 arranges circuit board Between 20 and radiating piece 50.

It should be noted that heat-conducting piece 41 also has thermolysis, but it is due to shape and surface area and mass ratio Design, its Main Function is to transmit heat between power component 31 and radiating piece 50.

It is further to note that heat conduction connection referred herein, to refer to can be between the two transmission heat, both may be used To be directly the constituted connection of transmission contact, or by other to transmit the object of heat as medium between the two The connection for being constituted.

Specifically, as shown in Figures 2 to 6, conductive filler body is provided between heat-conducting piece 41 and power component 31, heat conduction is filled out It can be the resilient liner 61 of the tool being made of a highly heat conductive material to fill body.When being assembled, heat-conducting piece 41 and power unit are made Part 31 is in close contact from liner 61 with liner 61, so as to eliminate due to they are directly connected to when the heat conductivity that caused due to gap The decline of energy.

In order that power component 31, liner 61 and heat-conducting piece 41 link together, liner 61 can be adopted in the method for paste Adhesion power component 31 and heat-conducting piece 41, in order to strengthen installing, it is possible to use fastening assembly 80 makes power component 31 and heat-conducting piece 41 compositions are fixedly connected, and specifically, fastening assembly 80 is screw bolt and nut composition, and bolt is used to install through power component 31 Part and heat-conducting piece 41, then reuse nut by it lock.

In order to eliminate the gap between heat-conducting piece 41 and radiating piece 50, conductive filler body, heat conduction also are provided between them Obturator can be the resilient liner 62 of the tool being made of a highly heat conductive material.

Conductive filler body can also be formed by the way of injecting glue.The heat conductivity span of conductive filler body be more than Equal to 0.2 W/ (m K).

As shown in Figures 2 to 6, heat-conducting piece 41 includes extension 411 and kink 412.Wherein, extension 411 approximately along The direction of perpendicular circuit board 20 extends, and kink 412 extends approximately along the direction of parallel circuit boards 20, and they generally comprise one The structure of " L " font.Extension 411 is fixedly connected with power component 31, and kink 412 is fixedly connected with radiating piece, so connects Connect can be can also be directly being indirectly connected with such as front the employing conductive filler body introduced.

When other power components 32 are additionally provided with charger 100, heat-conducting piece 42 can be separately provided for it, certainly, such as Shown in Fig. 7, a heat-conducting piece 43 also can simultaneously be responsible for the heat conduction of two power components 33,34, and now heat-conducting piece 43 can be taken The structure of "U" shaped as depicted.

Radiating piece can realize that it can also be the detached plate of polylith that it can be an entire plate in heat sink form, but Because heat conduction is broken off between detached plate, it is impossible to realize optimum radiating effect.So as shown in Figures 2 to 6, radiating piece 50 For a monoblock heat sink, it has：First plate face 51 and the second plate face 52, they are substantially parallel to circuit board and positioned at radiating The relative both sides of part 50, the first plate face 51 is located remotely from the side of heat-conducting piece 31, i.e. the second plate face 52 and is located at the He of the first plate face 51 Between heat-conducting piece 31.

The span of projected area of the radiating piece 50 in the plate face of circuit board 20 and board area ratio be more than etc. 2 are less than or equal in 0.3.

For the monnolithic case of charger 100, the length of radiating piece 50 and the wide length for being basically parallel to the profile of charger 100 And width, the radiating piece 50 that this makes have subjective surface product go to distribute heat.

Radiating piece 50 can arrange the inside of the shell 10 of charger 100, can expose shell 10 as one of shell 10 Point directly radiate to outside charger 100, now in order to ensure safety, radiating piece 50 should be not charged, thus heat-conducting piece 31 with dissipate Conductor filled body should be insulation between warmware 50.In addition, power component 31 is arranged on the space of the composition of shell 10 or shell 10 and the space that collectively forms of radiating piece 50 in.Certainly, when waterproof is needed, because radiating piece 50 can effectively dissipate Space residing for heat, circuit board 20 and power component 31 may also be completely enclosed.

Heat-conducting piece 31 and radiating piece 50 can adopt the excellent material of metal material, especially heat conductivility, they The span of heat conductivity is more than 50W/ (m K).The maximum temperaturerise that radiating piece 50 can so be made is less than or equal to 40K（Kai Er Text）, especially the temperature rise of the first plate face 51 or the outside housing of the first plate face 51 is less than or equal to 30K.

In addition, for effectively utilizes radiating piece 50, the transformator 70 of charger 100 can also be led by conductive filler body 63 Radiating piece 50 is thermally connected to so as to also make transformator 70 effectively radiate.

Certainly, above scheme can also be applied in other electric devices, and the power component with them effectively enters Row radiating.

Ultimate principle of the present utility model, principal character and advantage has been shown and described above.The technical staff of the industry It should be appreciated that above-described embodiment does not limit in any form this utility model, it is all by the way of equivalent or equivalent transformation The technical scheme for being obtained, all falls within protection domain of the present utility model.

Claims (10)

1. a kind of electric device, it is characterised in that include：

Shell；

It is provided with the circuit board of printed circuit；

The power component of heat is produced when being powered；

Conduct the heat-conducting piece of the heat produced by the power component；

The radiating piece of the heat dissipated produced by the power component；

Wherein,

The circuit board, power component, heat-conducting piece are arranged in the housing；

The circuit board is constituted with the power component and is conductively connected；

The power component constitutes heat conduction and is connected with the heat-conducting piece；

The heat-conducting piece constitutes heat conduction and is connected with the radiating piece；

The heat-conducting piece is arranged between the circuit board and the radiating piece.

2. electric device according to claim 1, it is characterised in that：

The resilient conductive filler body of tool is provided between the heat-conducting piece and the power component.

3. electric device according to claim 1, it is characterised in that：

The resilient conductive filler body of tool is provided between the heat-conducting piece and the radiating piece.

4. electric device according to claim 1, it is characterised in that：

The heat-conducting piece includes：

Extension, the direction along the vertical circuit board extends；

The extension is fixedly connected with the power component.

5. electric device according to claim 4, it is characterised in that：

The heat-conducting piece includes：

Kink, extends along the direction parallel to the circuit board；

The kink is fixedly connected with the radiating piece.

6. electric device according to claim 1, it is characterised in that：

The radiating piece is arranged on the enclosure or exposes the shell；The power component is arranged on the shell structure Into the space that collectively forms of space or the shell and radiating piece in.

7. electric device according to claim 1, it is characterised in that：

The radiating piece has：

First plate face, extends along the direction parallel to the circuit board；

Second plate face, extends along the direction parallel to the circuit board；

First plate face and second plate face are respectively arranged at the relative both sides of the radiating piece；

Second plate face is arranged between first plate face and the heat-conducting piece.

8. electric device according to claim 1, it is characterised in that：

Projected area of the radiating piece in the circuit board surface is big with the span of the board area ratio 2 are less than or equal in being equal to 0.3.

9. electric device according to claim 1, it is characterised in that：

The electric device is charger；The power component is power semiconductor.

10. electric device according to claim 9, it is characterised in that：

The charger also includes：

Transformator, constitutes with the circuit board and is conductively connected；

The transformator constitutes heat conduction and is connected with the radiating piece.