CN211858426U

CN211858426U - Box type film capacitor

Info

Publication number: CN211858426U
Application number: CN202020063432.8U
Authority: CN
Inventors: 谢志懋; 邬文彬
Original assignee: Foshan Xinyuan Electronic Co ltd
Current assignee: Foshan Xinyuan Electronic Co ltd
Priority date: 2020-01-13
Filing date: 2020-01-13
Publication date: 2020-11-03
Anticipated expiration: 2030-01-13

Abstract

The utility model provides a box-type film capacitor relates to the condenser field, the package comprises a core body, the cladding of the core outside has the sealing layer, the cladding of the sealing layer outside has the moisture absorption layer, the cladding of the moisture absorption layer outside has the encapsulating layer, the encapsulating layer outside cover has the box body, the core is connected with the pin that runs through the box body and extend to the box body outside. In the utility model, the core body is prevented from being affected with damp by the sealing fit of multiple layers with different effects, and the service life of the core body is prolonged; secondly, the shell of the capacitor is made of polytetrafluoroethylene plastic, so that the capacitor has higher strength, and the shell made of tetrafluoroethylene is matched with the multilayer protection made of epoxy resin, so that the high temperature resistance of the capacitor is improved, and the applicability of the capacitor is stronger; and finally, a sealing sleeve is arranged at the joint of the shell and the pin, so that the sealing property of the joint of the pin and the shell is ensured.

Description

Box type film capacitor

Technical Field

The utility model relates to a condenser field especially relates to a box-type film capacitor.

Background

The capacitor is a capacitor formed by two closely-spaced conductors insulated from each other, is one of a large number of electronic elements used in electronic equipment, is widely applied to aspects of isolating direct current and alternating current, coupling, bypass, filtering, tuning loops, energy conversion, control and the like in a circuit, is developed from an initial plate capacitor with a larger volume to a film capacitor in the present day along with technical innovation, and has the advantages of reduced volume and short performance improvement.

However, due to the wide application range of the capacitor, that is, the capacitor and the circuit mounted on the capacitor are often used under different environmental conditions, sometimes harsh conditions, such as high temperature and high humidity conditions, such harsh environmental conditions shorten the use effect and the service life of the capacitor.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a box-type film capacitor to solve above-mentioned technical problem.

The utility model discloses a solve above-mentioned technical problem, adopt following technical scheme to realize: the utility model provides a box-type film capacitor, includes the core, the cladding of core outside has the sealing layer, the cladding of sealing layer outside has the moisture absorption layer, the cladding of moisture absorption layer outside has the embedment layer, the embedment layer outside cover has the box body, the core is connected with and runs through the box body and extend to the pin in the box body outside.

Preferably, the sealing layer is made of an epoxy resin material.

Preferably, the moisture absorption layer (4) is a corrosion-resistant coating made of epoxy resin added with calcium chloride.

Preferably, the potting layer (5) is an organosilicon modified epoxy resin made of an epoxy resin added with polysilane.

Preferably, the cartridge is made of polytetrafluoroethylene plastic.

Preferably, the box body is provided with a jack inserted with the pin, the outer edge of the jack is fixedly connected with a sealing ring, and the outer edge of the sealing ring is fixedly connected with a sealing sleeve.

The utility model has the advantages that:

in the utility model, the outside of the wound capacitor core is coated with a sealing layer to make the capacitor sealed preliminarily, the outside of the sealing layer is coated with a moisture absorption layer to absorb moisture entering the sealing layer through the shell, the outside of the moisture absorption layer is coated with a potting layer, and a hydrophobic agent is added in the potting layer to reduce moisture entering the moisture absorption layer and connect the shell outside the potting layer, thus the sealing cooperation of different effects of multiple layers can avoid the core from being affected with damp and prolong the service life of the core; secondly, the shell of the capacitor is made of polytetrafluoroethylene plastic, so that the capacitor has higher strength, and the shell made of tetrafluoroethylene is matched with the multilayer protection made of epoxy resin, so that the high temperature resistance of the capacitor is improved, and the applicability of the capacitor is stronger; and finally, a sealing sleeve is arranged at the joint of the shell and the pin, so that the sealing property of the joint of the pin and the shell is ensured.

Drawings

FIG. 1 is a half-sectional view of the present invention;

FIG. 2 is a half-sectional view of the housing of the present invention;

reference numerals: 1. a core body; 2. a pin; 3. a sealing layer; 4. a moisture-absorbing layer; 5. a potting layer; 6. a box body; 7. and (5) sealing the sleeve.

Detailed Description

In order to make the technical means, the creation features, the achievement purposes and the functions of the present invention easy to understand, the present invention will be further explained below with reference to the following embodiments and the accompanying drawings, but the following embodiments are only the preferred embodiments of the present invention, and not all embodiments are included. Based on the embodiments in the implementation, other embodiments obtained by those skilled in the art without any creative efforts belong to the protection scope of the present invention.

Specific embodiments of the present invention will be described below with reference to the accompanying drawings.

Example 1

As shown in fig. 1-2, a box-type film capacitor comprises a core body 1, wherein a sealing layer 3 is coated on the outer side of the core body 1, a moisture absorption layer 4 is coated on the outer side of the sealing layer 3, a potting layer 5 is coated on the outer side of the moisture absorption layer 4, a box body 6 is coated on the outer side of the potting layer 5, the core body 1 is connected with a pin 2 which penetrates through the box body 6 and extends to the outer side of the box body 6, the sealing layer 3 is made of epoxy resin material, the moisture absorption layer 4 is made of epoxy resin material added with calcium chloride, the potting layer 5 is made of epoxy resin material added with polysilane, and the box body 6 is made of polytetrafluoroethylene plastic.

The box body 6 is made of polytetrafluoroethylene plastic, the polytetrafluoroethylene plastic has high corrosion resistance, the density of the polytetrafluoroethylene plastic is 2.14-2.20g/cm, the polytetrafluoroethylene plastic hardly absorbs water, the balance water absorption rate is less than 0.01%, the polytetrafluoroethylene plastic has super-strong sealing performance, even under a high-humidity working environment, the core body 1 in the box body 6 can be kept sealed, the box body 6 is internally provided with a potting layer 5, the potting layer 5 is made of epoxy resin added with polysilane, the polysilane belongs to a hydrophobic material, the polysilane is added into the epoxy resin, a hydrophobic film can be formed after the epoxy resin is solidified, moisture can be reduced from entering the interior of the potting layer 5, the moisture absorption layer 4 is arranged in the potting layer 5, the moisture absorption layer 4 is made of the epoxy resin added with calcium chloride, the moisture passing through the potting layer 5 can be absorbed, and the moisture can be prevented from continuously diffusing to the interior and entering the sealing layer 3, the box body 6 is matched with a plurality of filling layers with different effects, so that the capacitor can normally work under the conditions of 95 ℃ and 95% of relative humidity, and the capacitor has wide application range and long service life.

Example 2

As shown in fig. 1-2, a box-type film capacitor, includes core 1, the cladding of core 1 outside has sealing layer 3, the cladding of sealing layer 3 outside has moisture absorption layer 4, the cladding of moisture absorption layer 4 outside has potting layer 5, potting layer 5 outside cover has box body 6, core 1 is connected with and runs through box body 6 and extend to pin 2 in the box body 6 outside, be equipped with the jack of pegging graft with pin 2 on box body 6, jack outside edge fixedly connected with sealing washer, the outer fixedly connected with seal cover 7 of sealed

Set up seal cover 7 in the position that box body 6 and pin 2 are connected, make seal cover 7 inboard and pin 2 fixed connection, strengthen the weakest part of box body 6, be used for supporting pin 2 simultaneously, strengthened pin 2's intensity, guarantee box body 6's sealing performance.

The working principle is as follows: the utility model discloses a shell that polytetrafluoroethylene plastics made carries out preliminary interception to outside moisture, reduce the moisture and get into the inside volume of box body 6, and polytetrafluoroethylene has high temperature resistance, make the condenser can be at the temperature range below 95 ℃ keep stable work, 5 interpolation hydrophobic materials on embedment layer avoid the moisture to invade inside, 5 inside hygroscopic layers 4 that set up on embedment layer, can absorb the moisture that gets into, avoid it further deep, thereby protection core 1, strengthen the life of condenser, improve the application scope of condenser.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It should be understood by those skilled in the art that the present invention is not limited by the above embodiments, and the description in the above embodiments and the description is only preferred examples of the present invention, and is not intended to limit the present invention, and that the present invention can have various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications all fall into the scope of the claimed invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A box-type film capacitor comprising a core (1), characterized in that: core (1) outside cladding has sealing layer (3), sealing layer (3) outside cladding has moisture absorption layer (4), moisture absorption layer (4) outside cladding has potting layer (5), potting layer (5) outside cover has box body (6), core (1) is connected with pin (2) that run through box body (6) and extend to the box body (6) outside.

2. A film cassette capacitor as defined in claim 1 wherein: the sealing layer (3) is made of epoxy resin material.

3. A film cassette capacitor as defined in claim 1 wherein: the moisture absorption layer (4) is a corrosion-resistant coating made of epoxy resin added with calcium chloride.

4. A film cassette capacitor as defined in claim 1 wherein: the encapsulating layer (5) is organic silicon modified epoxy resin prepared from epoxy resin added with polysilane.

5. A film cassette capacitor as defined in claim 1 wherein: the box body (6) is made of polytetrafluoroethylene plastic.

6. A film cassette capacitor as defined in claim 1 wherein: the box body (6) is provided with an insertion hole inserted with the pin (2), the outer edge of the insertion hole is fixedly connected with a sealing ring, and the outer side of the sealing ring is fixedly connected with a sealing sleeve (7).