CN208189400U - One kind preventing safety induction cooker film special capacitor on fire - Google Patents

Abstract

One kind preventing safety induction cooker film special capacitor on fire, including installing thin film capacitor on circuit boards, thin film capacitor is externally provided with shell, the shell is metallic object, the inner wall of metallic object is provided with insulating layer, and shell is equipped with and is open, and is connected to flange to curved in opening, insulating layer extends to flange；Thin film capacitor is packaged as shell using metallic object, shell generally uses aluminium compression moulding, metal shell aperture position is provided with flange, insulating layer extends to flange simultaneously, high thermal conductivity, insulating layer resistant to high temperature (insulating materials), are applied directly on the inner wall of shell, and the shell of this insulating materials and metallic object has good adhesiveness, so that capacitor body is not will form short circuit equally, meets the smaller requirement of thin film capacitor volume that electromagnetic oven uses；When thin film capacitor failure, the shell of metallic object is firm.

Description

One kind preventing safety induction cooker film special capacitor on fire

Technical field

The utility model relates to a kind of technical field of the dedicated capacitor of electromagnetic oven, especially one kind prevents safety electric on fire Magnetic furnace film special capacitor.

Background technique

Currently, in Household induction cooker using to metallic film capacitor all be use plastic shell encapsulate because Plastic shell itself because plastic part insulating properties, capacitor body not will form short circuit inside it, is able to satisfy electromagnetic oven It is smaller using thin film capacitor volume, requirement of good performance.It is but due to defect existing for thin film capacitor itself, i.e., thin Film itself is combustible material, when thin film capacitor fails, is easier to cause phenomenon on fire.Although and plastic shell Currently used fire proofing production, but since the defect of its intensity necessarily leads to shell when capacitor internal expansion is on fire Explosion, flame will be extended to capacitor periphery by gap, at this point, the damage that electromagnetic oven pcb board upper periphery component will be caused, Meanwhile causing the on fire of electromagnetic oven.

Utility model content

The purpose of the utility model is to overcome above-mentioned the shortcomings of the prior art, and provide a kind of structure conjunction The electromagnetic oven film special capacitor of reason, can be provided simultaneously with good insulation performance and heat dissipation performance, due to having insulating layer, electricity Container fuse not will form short circuit；In addition, the metallic object used is as shell, when thin film capacitor failure, shell will not be quick-fried Split, can effectively blocking condenser propagation of flame and adverse effect is caused to periphery component.

The technical scheme adopted by the utility model to solve the technical problem is as follows:

One kind preventing safety induction cooker film special capacitor on fire, including installing thin film capacitor on circuit boards, Thin film capacitor is externally provided with shell, characterized in that the shell is metallic object, and the inner wall of metallic object is provided with insulating layer, and outer Shell, which is equipped with, to be open, and is connected to flange to curved in opening, insulating layer extends to flange.

Using the electromagnetic oven film special capacitor of the structure, thin film capacitor is sealed as shell using metallic object Dress, shell generally use aluminium compression moulding, it is also considered that can use other conventional metal materials, such as stainless steel, copper etc., metal-back Body aperture position is provided with flange, while insulating layer extends to flange, high thermal conductivity, insulating layer resistant to high temperature (insulating materials), directly It connects on the inner wall coated in shell, the shell of this insulating materials and metallic object has good adhesiveness, between metal shell Situations such as there is no air gaps；Due to the presence of insulating layer, and flange is extended to, makes capacitor body equally and not will form and is short Road meets the smaller requirement of thin film capacitor volume that electromagnetic oven uses.Meanwhile the performance for having no effect on capacitor itself；When When thin film capacitor fails, the shell of metallic object is firm, will not burst, and can effectively the propagation of flame of blocking condenser and it is right Periphery component causes adverse effect, meanwhile, it can prevent the high temperature of external devices from generating adverse effect to capacitor；Moreover, golden The thermal conductive resin for belonging to the shell of body itself, enables the heat of capacitor internal to be more rapidly pulled away, and improves capacitor life-span, Meanwhile capacitor may make to can be used under higher ambient temperature conditions.

Insulating layer is high thermal conductivity, material resistant to high temperature.

The flange is connect by curved turn over backward of disk, turns over formation creepage distance L1 between highest point and opening after connecing；It mentions High anti-short-circuit capability, can prevent capacitor lead-out electrode due to close with shell edge, caused by insulation climb electricity or short circuit problem. When preventing capacitor due to being mounted in PCB circuit board simultaneously, direct with circuit board contacts the PCB circuit board electricity that may cause The destruction of line structure.

Spacing L2 is equipped between flange and outer shell outer wall；Improve anti-short-circuit capability, can prevent capacitor lead-out electrode due to It is close with shell edge, caused by insulation climb electricity or short circuit problem.

Insulating layer with a thickness of≤0.1mm.

Shell it is opening down, and offset with circuit board.

The beneficial effects of the utility model are:

(1) the utility model is packaged compared with present technology using metal-back, and sheathing material uses metallic object, when Thin film capacitor fail when, the shell of metallic object will not burst, can effectively blocking condenser propagation of flame and to periphery member device Part causes adverse effect, meanwhile, it can prevent the high temperature of external devices from generating adverse effect to capacitor.

(2) one kind of the utility model prevents safety induction cooker film special capacitor on fire, since the inner wall of shell has Standby insulating layer, therefore, the thin film capacitor are mounted on the pcb board with copper electrode covering, can't be because of the outer of metallic object The electric conductivity of shell causes the electrical performance issues such as the short circuit of pcb board.

(3) one kind of the utility model prevents safety induction cooker film special capacitor on fire, flange partially due to Have insulation performance, thin film capacitor extraction electrode can be prevented due to close with shell edge, caused by insulation climb electricity or short circuit Problem.

(4) one kind of the utility model prevents safety induction cooker film special capacitor on fire, thermally conductive insulating layer cooperation The thermal conductive resin of metal shell itself enables the heat inside thin film capacitor to be more rapidly pulled away, and improves the capacitor longevity Life, meanwhile, it may make capacitor to can be used under higher ambient temperature conditions.

(5) one kind of the utility model prevents safety induction cooker film special capacitor on fire, while the shell tool of metal There is certain ductility, will not burst, simultaneously as the material that the shell of metal uses is relatively thin, in product failure, shell Position can preferentially heave so that capacitor body is to protruding certain size at the shell nozzle of metal, product failure position due to The barrier of the shell and product ontology of metal can not be contacted directly with outside air, prevent the possibility of burning；And metal Shell can effectively blocking condenser propagation of flame and adverse effect is caused to periphery component.

Detailed description of the invention

Fig. 1 is the structure sectional view of the utility model installation on circuit boards.

Fig. 2 is the structure sectional view of shell in the utility model.

Specific embodiment

The present invention will be further described with reference to the accompanying drawings and examples:

As Figure 1-Figure 2: one kind preventing safety induction cooker film special capacitor on fire, including is mounted on circuit board 1 On thin film capacitor 2, thin film capacitor 2 is externally provided with shell 3, characterized in that the shell 3 is metallic object, metallic object it is interior Wall is provided with high thermal conductivity, insulating layer resistant to high temperature 4, insulating layer 4 with a thickness of≤0.01mm, and shell 3 is equipped with directed downwardly open Mouth 301, and offset with circuit board 1, it is connected to flange 302 to curved in opening 301, insulating layer 4 extends to flange 302.

Using the electromagnetic oven film special capacitor of the structure, thin film capacitor 2 is carried out as shell 3 using metallic object Encapsulation, shell 3 generally use aluminium compression moulding, it is also considered that can use other conventional metal materials, such as stainless steel, copper etc., gold 301 positions of the opening of shell 3 of category topic are provided with flange 302, while insulating layer 4 extends to flange, high thermal conductivity, insulation resistant to high temperature 4 (insulating materials) of layer, are applied directly on the inner wall of shell 3, and the shell of this insulating materials and metallic object has good bonding Property, between shell 3 be not present air gap situations such as；Due to the presence of insulating layer 4, and flange 302 is extended to, makes capacitor core Son not will form short circuit equally, meet the smaller requirement of 2 volume of thin film capacitor that electromagnetic oven uses.Meanwhile it having no effect on thin The performance of membrane capacitance 2 itself；When thin film capacitor 2 fails, the shell of metallic object is firm, will not burst, and can be effective The propagation of flame of barrier film capacitor 2 and adverse effect is caused to periphery component, meanwhile, the high temperature of external devices can be prevented Adverse effect is generated to thin film capacitor 2；Moreover, the thermal conductive resin of the shell 3 of metallic object itself, so that thin film capacitor 2 Internal heat can be more rapidly pulled away, and be improved 2 service life of thin film capacitor, meanwhile, it may make thin film capacitor 2 to can be used in more Under high ambient temperature conditions.

The flange 302 is connect by curved turn over backward of disk, is turned over to be formed between the highest point 302-1 after connecing and opening 301 and be climbed Electrical distance L1；Anti- short-circuit capability is improved, 2 extraction electrode 5 of thin film capacitor can be prevented due to close with 3 edge of shell, caused by Electricity or short circuit problem are climbed in insulation.

Spacing L2 is equipped between 3 outer wall of flange 302 and shell；Anti- short-circuit capability is improved, can prevent thin film capacitor 2 from drawing Electrode due to close with 3 edge of shell, caused by insulation climb electricity or short circuit problem.

Particular embodiments described above, only the utility model preferred embodiment, such as according to the utility model The equivalent arrangements that claim is done, the technology that should be the utility model are covered.

Claims (5)

1. one kind prevents safety induction cooker film special capacitor on fire, thin including installing thin film capacitor on circuit boards Membrane capacitance is externally provided with shell, characterized in that the shell is metallic object, and the inner wall of metallic object is provided with insulating layer, and shell It is equipped with and is open, be connected to flange to curved in opening, insulating layer extends to flange.

2. one kind prevents safety induction cooker film special capacitor on fire according to claim 1, which is characterized in that described to turn over Side is connect by curved turn over backward of disk, turns over formation creepage distance L1 between highest point and opening after connecing.

3. one kind prevents safety induction cooker film special capacitor on fire according to claim 2, flange and outer shell outer wall it Between be equipped with spacing L2.

4. one kind prevents safety induction cooker film special capacitor on fire according to claim 1, insulating layer with a thickness of≤ 0.1mm。

5. one kind prevents safety induction cooker film special capacitor on fire according to claim 1, shell it is opening down, and It offsets with circuit board.