CN113889340A

CN113889340A - Explosion-proof capacitor

Info

Publication number: CN113889340A
Application number: CN202111122932.XA
Authority: CN
Inventors: 李唐; 张明; 田红波
Original assignee: Shenzhen Kangchengda Electronics Co ltd
Current assignee: Shenzhen Kangchengda Electronics Co ltd
Priority date: 2021-09-24
Filing date: 2021-09-24
Publication date: 2022-01-04

Abstract

The utility model relates to an explosion-proof capacitor, it includes the shell with set up in core in the shell, be connected with the pin on the core, the pin passes the one end of shell, the shell is kept away from the one end of pin is equipped with the louvre, be provided with in the louvre and make fluid can only follow the inside one-way flow direction of shell the outside check valve of shell, the shell is kept away from the heat conduction post is worn to be equipped with at the middle part of the one end of pin, the core is around locating heat conduction post and shaping, heat conduction post keeps away from the one end of core is connected with the fin, heat conduction post is insulating material, the fin with there is the clearance between the shell. This application utilizes the check valve to carry out the pressure release, and check valve repeatedly usable has reduced the replacement rate of condenser, saves the cost to heat conduction post can dispel the heat to the core center, has also reduced the expanded possibility of condenser.

Description

Explosion-proof capacitor

Technical Field

The application relates to the field of capacitors, in particular to an explosion-proof capacitor.

Background

The capacitor is a device for accommodating electric charge, is one of electronic components used in a large number of electronic devices, and is widely applied to aspects of blocking direct current and alternating current, coupling, bypassing, filtering, tuning loop, energy conversion, control and the like in a circuit.

The electric capacity of condenser in the circuit is great, very easily rapid heating up when the overload condition appears in-service use, and inside insulation can be ageing-accelerated, decompose under the high temperature, produces gas, and condenser case internal pressure increases, appears the phenomenon of inflation or even explosion, and the condenser can cause the damage of company to other electronic components near if the explosion can, and consequently, the design of condenser often has explosion-proof equipment. The explosion-proof design of the existing explosion-proof capacitor is mainly that an explosion-proof wire is arranged in the capacitor, the explosion-proof wire can be disconnected when the capacitor is overloaded, and explosion can not occur after the capacitor is powered off.

However, in an actual circuit, the circuit has a large current when being opened and closed, occasionally, the capacitor can overload in a short time, the capacitor in the above form can only realize explosion prevention by destroying the capacitor, and an explosion-proof wire of the capacitor is broken when overload occurs, so that the capacitor needs to be replaced again, and the cost is high.

Disclosure of Invention

In order to improve and carry out the higher problem of explosion-proof cost through explosion-proof silk destruction formula ground to the condenser, this application provides an explosion-proof condenser.

The application provides an explosion-proof capacitor adopts following technical scheme:

the utility model provides an explosion-proof capacitor, include the shell with set up in core in the shell, be connected with the pin on the core, the pin passes the one end of shell, the shell is kept away from the one end of pin is equipped with the louvre, be provided with in the louvre and make fluid can only follow the inside one-way flow direction of shell the outside check valve of shell, the shell is kept away from wear to be equipped with the heat conduction post in the middle part of the one end of pin, the core is around locating heat conduction post and shaping, the heat conduction post is kept away from the one end of core is connected with the fin, the heat conduction post is insulating material, the fin with there is the clearance between the shell.

Through adopting above-mentioned technical scheme, when condenser overload during operation, the inside high temperature and the pressure that produces of core can discharge from the shell in through the check valve, realize the heat dissipation pressure release, because the heat of condenser overload during operation core center department is difficult to dispel, the cooling degree of difficulty is big, can arrange the heat conduction of core central part to the fin through setting up the heat conduction post and dispel, the fin area is big, the radiating effect is good, can dispel the heat to the core center well and cool down, and in the condenser use, heat conduction post and fin can be sustainable dispelled the heat to the core, the possibility of high temperature inflation phenomenon has been reduced to the core, be favorable to protecting the condenser.

When the capacitor recovers to normal load and the internal pressure of the shell is reduced to a normal range, the one-way valve can be automatically closed and seal the shell, the one-way valve can be repeatedly used, the replacement rate of the capacitor is reduced, and the cost is saved.

Optionally, a heat conducting fin is arranged between the heat conducting column and the heat radiating fin, the heat conducting fin and the heat conducting column are integrated, and the heat radiating fin is attached to one surface, far away from the heat conducting column, of the heat conducting fin.

Through adopting above-mentioned technical scheme, the area of contact of conducting strip and fin is bigger, and is more easy with heat conduction to fin, is favorable to improving the radiating effect.

Optionally, the heat conducting column and the heat conducting fin are both made of heat conducting insulating silicon rubber materials.

By adopting the technical scheme, the heat-conducting insulating silicon rubber has good heat transfer effect and good aging resistance, can bear heat generated by the capacitor during working for a long time, and has long service life.

Optionally, the heat sink is made of an aluminum alloy.

By adopting the technical scheme, the aluminum alloy material has good heat-conducting property and high heat-radiating speed, and can realize quick heat radiation and cooling.

Optionally, the heat sink is connected with a plurality of heat dissipation fins, the plurality of heat dissipation fins are distributed at intervals, and the heat dissipation fins and the heat sink are integrated.

Through adopting above-mentioned technical scheme, the setting greatly increased holistic heat radiating area of heat dissipation fin is favorable to dispelling the heat and cooling fast.

Optionally, the radiating fins shield an area right above the radiating holes.

Through adopting above-mentioned technical scheme, utilize the fin to shelter from the louvre top, reduced the possibility that the foreign matter got into the louvre to avoid influencing the pressure release effect of check valve.

Optionally, the heat dissipation hole gradually increases along a direction close to the core.

Through adopting above-mentioned technical scheme, can play the guide effect to the inside pressure of shell and heat, make pressure and heat discharge through the check valve is quick more easily.

Optionally, the heat dissipation holes are provided in plurality around the heat conduction column.

Through adopting above-mentioned technical scheme, the setting up of a plurality of louvres can improve the heat dissipation pressure release effect of condenser greatly to prevent that condenser case internal pressure acceleration rate is greater than the condition of pressure release speed, greatly reduced the possibility of condenser explosion.

Optionally, a flange is arranged at an edge of one end of the housing, which is far away from the pin.

Through adopting above-mentioned technical scheme, because the internal and external pressure differential of capacitor case is big during the pressure release, probably have very little electrolyte and spout under the effect of pressure, the flange can restrict the collection to spun electrolyte, has reduced on the unrestrained circuit board of electrolyte or other components and parts and has caused the possibility of destruction.

Optionally, the top of the rib is arranged to be inclined upwards along a direction away from the heat conducting column.

Through adopting above-mentioned technical scheme, the slope setting of flange can play the guide effect to pressure release exhaust heat and gas, has reduced the inboard regional pressure of flange and thermal residue.

In summary, the present application includes at least one of the following beneficial technical effects:

1. high temperature and pressure through the inside production of check valve to condenser overload during operation core dispel the heat pressure release, heat conduction to the fin through heat conduction post to core central part is arranged and is dispersed, the fin area is big, the radiating effect is good, can dispel the heat to the core center well and cool down, and in the condenser use, heat conduction post and fin can be sustainable dispelled the heat to the core, the possibility of core high temperature inflation has been reduced, be favorable to protecting the condenser, check valve repeatedly usable behind the pressure release, the replacement rate of condenser has been reduced, and the cost is saved.

2. The arrangement of the heat dissipation fins greatly increases the heat dissipation area of the heat dissipation fin, and is favorable for quickly dissipating heat and reducing temperature.

3. The flange can restrict the collection of the less electrolyte that probably spouts during the pressure release, and the possibility of damage caused by the electrolyte spilling on a circuit board or other components is reduced.

Drawings

FIG. 1 is a schematic cross-sectional view of an embodiment of the present application;

FIG. 2 is a schematic structural diagram of an embodiment of the present application;

FIG. 3 is a top schematic view of a housing of an embodiment of the present application;

description of reference numerals: 1. a housing; 11. heat dissipation holes; 12. a one-way valve; 13. blocking edges; 2. a core body; 21. a pin; 3. a heat-conducting column; 31. a heat conductive sheet; 4. a heat sink; 41. and a heat dissipation fin.

Detailed Description

In the following description of the present application with reference to the drawings, it should be noted that if directional indications (such as up, down, left, right, front, and back … …) are referred to in the embodiments of the present application, the directional indications are only used to explain the relative positional relationship between the components, the movement, and the like in a specific posture, and if the specific posture is changed, the directional indications are changed accordingly.

The embodiment of the application discloses an explosion-proof capacitor. Referring to fig. 1, the explosion-proof capacitor includes a housing 1 and a core 2 installed in the housing 1, two pins 21 are connected to the core 2, and the two pins 21 penetrate through one end of the housing 1 for connecting a circuit board or a circuit.

The center of the other end of the shell 1 is penetrated with a heat conducting column 3 made of insulating materials, and the core body 2 is formed by laminating an anode foil, a cathode foil and an electrolytic paper and winding the anode foil, the cathode foil and the electrolytic paper on the heat conducting column 3. One end of the heat conduction column 3, which is far away from the core body 2, penetrates out of the shell 1 and is connected with a cooling fin 4, the cooling fin 4 is vertical to the heat conduction column 3, and a gap exists between the cooling fin 4 and the shell 1. In the use process of the capacitor, the heat conducting column 3 and the radiating fins 4 can continuously conduct and radiate heat generated by the core body 2, so that the possibility of expansion and explosion of the capacitor is reduced, heat accumulated in the core body can be reduced when the capacitor works in an overload state, and the capacitor is not easy to expand and explode when the capacitor works in the overload state.

In this embodiment, the heat-conducting column 3 is made of heat-conducting insulating silicon rubber, and the heat sink 4 is made of aluminum alloy. The heat-conducting insulating silicon rubber has good heat-conducting effect and excellent ageing resistance, so that the heat-conducting column 3 can bear the temperature generated when the core works for a long time, and the service life is long. The aluminum alloy material has excellent heat-conducting property and very high heat-radiating speed, so that the radiating fins 3 can quickly radiate heat.

In other embodiments, the heat-conducting pillar 3 may also be made of other insulating materials with good heat-conducting property, such as insulating ceramic material, polyimide material, etc. The heat sink 4 may also be made of other metal materials with good thermal conductivity, such as copper sheet, silver sheet, etc.

The one end that the core 2 was kept away from to heat conduction post 3 is connected with conducting strip 31, and conducting strip 31 is as an organic whole with heat conduction post 3 and is made by heat conduction insulating silicon rubber material, and fin 4 laminates in the one side that heat conduction post 3 was kept away from to conducting strip 31. The contact area between the heat conducting fin 31 and the heat radiating fin 4 is larger, so that heat generated by the core body is more easily conducted to the heat radiating fin 4, and the heat radiating effect is improved.

The heat sink 4 is connected with a plurality of heat dissipation fins 41, the heat dissipation fins 41 are integrated with the heat sink 4 and made of an aluminum alloy material, and the plurality of heat dissipation fins 41 are uniformly distributed at intervals and perpendicular to the heat sink 4. The plurality of heat dissipation fins 41 greatly increase the overall heat dissipation area, and facilitate rapid heat dissipation and cooling.

One end of the shell 1, which is far away from the pin 21, is further provided with a circular heat dissipation hole 11, a one-way valve 12 is installed in the heat dissipation hole 11, and the one-way valve 12 enables fluid to flow to the outside of the shell 1 from the inside of the shell 1 in a one-way mode. When the capacitor works in an overload mode, high temperature and pressure generated inside the core body 2 can be discharged from the shell 1 through the one-way valve 12, and due to the fact that a gap exists between the radiating fins 4 and the shell 1, radiating and pressure relief of the capacitor can be achieved.

In this embodiment, louvre 11 is equipped with four around 3 even intervals of heat conduction post, all installs check valve 12 in every louvre 11, but four check valve 12 simultaneous working during the pressure release to improve heat dissipation pressure release effect greatly, reduced the possibility that 1 internal pressure increase rate of appearance shell is greater than the pressure release speed and leads to the condenser explosion, the security improves greatly.

In order to quickly discharge the pressure and heat generated by a new body when the capacitor works in an overload state, the heat dissipation hole 11 is gradually enlarged along the direction close to the core body 2, so that the pressure and heat inside the shell 1 are guided, and the pressure relief and heat dissipation are easier through the one-way valve 12.

The edge of the end of the housing 1 far away from the pin 21 is provided with a rib 13, and the rib 13 enables the end surface of the end of the housing 1 far away from the pin 21 to form a circular accommodating area. Because probably there is very little electrolyte to spout through check valve 12 under the effect of pressure during the pressure release, flange 13 can restrict the collection to spun electrolyte, has reduced the possibility that electrolyte spilt on circuit board or other components and parts, is favorable to protecting circuit board and other components and parts.

The top of the rib 13 is inclined upwards along the direction far away from the heat conducting column 3 to form an inclined plane, so that the pressure relief exhausted heat and gas can be guided, and the pressure and heat residue in the area inside the rib 13 is reduced.

In order to reduce the possibility that foreign matters enter the heat dissipation hole 11 to affect the pressure relief of the check valve 12 when the capacitor is used, the heat dissipation fin 4 is set to a size capable of shielding the area right above the heat dissipation hole 11 so as to prevent the check valve 12 from being directly exposed, and therefore the heat dissipation hole 11 can be protected.

The implementation principle of the explosion-proof capacitor in the embodiment of the application is as follows: when the capacitor works in an overload mode, high temperature and pressure generated inside the core body 2 can be discharged from the shell 1 to the outside through the one-way valve 12, and therefore heat dissipation and pressure relief of the capacitor are achieved. Because the heat in the center of the core 2 is most difficult to dissipate when the capacitor works in an overload state, and the cooling difficulty is the greatest, the heat in the center of the core 2 is conducted to the radiating fins 4 by the heat conducting columns 3 to be dissipated, the radiating fins 4 are large in area and good in radiating effect, and the center of the core 2 can be well cooled. In addition, in the capacitor use process, the heat conduction column 3 and the radiating fin 4 can continuously radiate the center of the core body 2, so that the possibility of high-temperature expansion of the core body 2 is reduced, and the capacitor is protected. When shell 1 internal pressure reduces to normal scope, check valve 12 can self-closing and seal shell 1, and check valve 12 repeatedly usable compares in the mode of destruction formula outage in this application, greatly reduced the replacement rate of condenser, save the cost.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides an explosion-proof capacitor, includes shell (1) and sets up in core (2) in shell (1), be connected with pin (21) on core (2), pin (21) pass the one end of shell (1), its characterized in that: keep away from shell (1) the one end of pin (21) is equipped with louvre (11), be provided with in louvre (11) and make the fluid only can follow the inside one-way flow direction of shell (1) outside check valve (12), shell (1) is kept away from heat conduction post (3) are worn to be equipped with in the middle part of the one end of pin (21), core (2) are around locating heat conduction post (3) and shaping, heat conduction post (3) are kept away from the one end of core (2) is connected with fin (4), heat conduction post (3) are insulating material, fin (4) with there is the clearance between shell (1).

2. The explosion-proof capacitor as set forth in claim 1, wherein: a heat conducting fin (31) is arranged between the heat conducting column (3) and the radiating fin (4), the heat conducting fin (31) and the heat conducting column (3) are integrated, and the radiating fin (4) is attached to one surface, far away from the heat conducting column (3), of the heat conducting fin (31).

3. The explosion-proof capacitor as set forth in claim 2, wherein: the heat conducting column (3) and the heat conducting fin (31) are both made of heat conducting insulating silicon rubber materials.

4. The explosion-proof capacitor as set forth in claim 1, wherein: the radiating fins (4) are made of aluminum alloy materials.

5. The explosion-proof capacitor as set forth in claim 1, wherein: the radiating fin (4) is connected with a plurality of radiating fins (41), the radiating fins (41) are distributed at intervals, and the radiating fins (41) and the radiating fin (4) are integrated.

6. The explosion-proof capacitor as set forth in claim 1, wherein: the radiating fins (4) shield the area right above the radiating holes (11).

7. The explosion-proof capacitor as set forth in claim 1, wherein: the heat dissipation holes (11) become larger gradually along the direction close to the core body (2).

8. The explosion-proof capacitor as set forth in claim 1, wherein: the heat dissipation holes (11) are formed in a plurality of positions around the heat conduction column (3).

9. The explosion-proof capacitor as set forth in claim 1, wherein: and a flange (13) is arranged at the edge of one end of the shell (1) far away from the pin (21).

10. An explosion-proof capacitor as set forth in claim 9, wherein: the top of the flange (13) is arranged in an upward inclined mode along the direction far away from the heat conducting column (3).