CN105575661A

CN105575661A - High-heat-radiation power capacitor

Info

Publication number: CN105575661A
Application number: CN201510478101.4A
Authority: CN
Inventors: 仲杏英
Original assignee: 仲杏英
Current assignee: Zhejiang Huayao Electrical Technology Co. Ltd.
Priority date: 2015-08-07
Filing date: 2015-08-07
Publication date: 2016-05-11
Anticipated expiration: 2035-08-07
Also published as: CN105575661B

Abstract

The invention provides a high-heat-radiation power capacitor comprising a shell and an internal core. The high-heat-radiation power capacitor also comprises a rigid telescoping tube of which the two ends are closed. Mercury is sealed in the internal part of the telescoping tube. One end of the telescoping tube stretches into the shell and penetrates through the internal core along the axis of the internal core, and the other end stretches out of the shell so that multiple segments of telescoping short tubes are formed. A heat-radiating fin is transversely fixed on each segment of telescoping short tube. The high-heat-radiation power capacitor has great heat radiation performance and is small in size under the non-obvious heating state.

Description

Heat dissipation type high power capacitor

Technical field

The present invention relates to electric power facility field, especially, is a kind of power capacitor.

Background technology

Capacitor is a kind of conventional electric power facility, is mainly used in the power factor (PF) improving electric power system, and because power network current is comparatively large, capacitor easily generates heat, and therefore needs the radiating effect considering capacitor.And in order to improve the heat dispersion of capacitor, the most directly mode installs radiator additional for capacitor, but current metal heat sink structural volume is comparatively large, is obviously not easy to the accumulating of capacitor.

Summary of the invention

For the problems referred to above, the object of the present invention is to provide a kind of heat dissipation type high power capacitor, this heat dissipation type high power capacitor not only has good heat dispersion, and less in non-obvious febrile state lower volume.

The technical scheme that actualizing technology object of the present invention adopts is: this heat dissipation type high power capacitor comprises shell and inner core; Also comprise the rigid telescopic tube of a closed at both ends, the inside envelope of described telescoping tube has mercury; And one end of described telescoping tube is stretched in described shell, the axis along described inner core runs through inner core, and the other end stretches out outside described shell, forms Multi-section telescopic short tube, and each section of flexible short tube laterally fixes a slice fin respectively.

As preferably, the part that described telescoping tube is in described enclosure is non-telescoping, be a rigid pipe, and the port of this rigid pipe flushes with the outer surface of the described shell run through by it; This prevents described telescoping tube from destroying described inner core because of flexible on the one hand, can make the outer surface that can be displaced to shell of fitting completely from that sheet fin that described shell is nearest with telescoping tube, to reduce the overall volume of capacitor as much as possible on the other hand.

As preferably, described inner core is formed by capacitance electrode paper roll system, and directly with described telescoping tube for standard shaft rolls; Described telescoping tube surface is coated with and is shaped with thermally conductive insulating layer.

As preferably, described shell is column, and described telescoping tube is coaxial with described shell, and an end face of telescoping tube one end and shell of stretching into enclosure fixes; And on described shell the intensity of that end face that runs through by telescoping tube be obviously weaker than other face of shell.

As preferably, each described fin is also distributed with louvre.

Beneficial effect of the present invention is: when this heat dissipation type high power capacitor is under normal temperature state, because internal temperature is lower, mercury in described telescoping tube keeps less volume, and make telescoping tube remain on contraction state, each described fin is bonded to each other, and lean against on the outer surface of described shell, make the state that the volume of whole power capacitor keeps less, so that accumulating; And when this power capacitor works at high load capacity, core temperature raises, mercury temperature in telescoping tube is raised, volumetric expansion, thus axially promotion telescoping tube outwards stretches, thus drive each described fin mutually away from, form the version of common radiator, to obtain excellent radiating effect.

Accompanying drawing explanation

Fig. 1 is the state diagram of embodiment under normal temperature state of this heat dissipation type high power capacitor.

Fig. 2 is the state diagram in a thermally hot condition of Fig. 1 embodiment.

Fig. 3 is in Fig. 1 embodiment, telescoping tube match with fin part structural representation.

Embodiment

Below in conjunction with drawings and Examples, the present invention is further described:

In Fig. 1 ~ embodiment illustrated in fig. 3, this heat dissipation type high power capacitor comprises shell 1 and inner core 2; Also comprise the rigid telescopic tube 3 of a closed at both ends, the inside envelope of described telescoping tube 3 has mercury; And one end of described telescoping tube 3 is stretched in described shell 1, the axis along described inner core 2 runs through inner core, and the other end stretches out outside described shell 1, forms Multi-section telescopic short tube 31, and each section of flexible short tube 31 laterally fixes a slice fin 41 respectively.

Above-mentioned power capacitor, under normal temperature state, the small volume of described mercury, can make the free end of described telescoping tube 3 be contracted to and the fin 41 on each telescopic end pipe 31 is close to mutually, forms radiating block 4, and is adjacent to as shown in Figure 1 on the surface of shell 1.

Above-mentioned power capacitor, described shell 1 is in column, and described telescoping tube 3 is coaxial with shell 1; Described inner core 2 is formed by capacitance electrode paper roll system, and directly with described telescoping tube 3 for standard shaft rolls; Described telescoping tube 3 surface is coated with and is shaped with thermally conductive insulating layer.

Above-mentioned power capacitor, the part that described telescoping tube 3 is in described shell 1 inside is non-telescoping, is a rigid pipe, and the outer surface of described shell 1 that the port of this rigid pipe is run through by it flushes; This prevents described telescoping tube 3 from destroying described inner core 2 because of flexible on the one hand, can make the outer surface that can be displaced to shell of fitting completely from that sheet fin 41 that described shell 1 is nearest with telescoping tube 3, to reduce the overall volume of capacitor as much as possible on the other hand.

In addition, each described fin 41 can also be distributed with louvre, to improve air circulation.

When above-mentioned heat dissipation type high power capacitor is under normal temperature state, because internal temperature is lower, mercury in described telescoping tube 3 keeps less volume, and make telescoping tube 3 remain on contraction state, each described fin 41 is bonded to each other, forms radiating block 4, and leans against on the outer surface of described shell 1, make the state that the volume of whole power capacitor keeps less, so that accumulating; And when this power capacitor works at high load capacity, core temperature raises, mercury temperature in telescoping tube 3 is raised, volumetric expansion, thus axially promote telescoping tube and outwards stretch, thus drive each described fin 41 mutually away from, form the version of common radiator, as shown in Figure 2, to obtain excellent radiating effect.

In addition, on the basis of above-described embodiment, an end face of the one end and shell that described telescoping tube 3 can also be made to stretch into enclosure fixes; And on described shell 1 intensity of that end face (being lower surface in Fig. 1, Fig. 2) that runs through by telescoping tube be obviously weaker than other face of shell.In the case, even if capacitor explodes due to extreme accident, then must make the end face first explosion run through by telescoping tube 3, the gases at high pressure of capacitor internal impact on described fin 41, capacitor internal is recoiled simultaneously, thus capacitor is balanced at axially loaded, effectively can prevent capacitor from flying away towards a direction, reduce the possibility that its explosion time produces harm to greatest extent.

The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.

Claims

1. a heat dissipation type high power capacitor, this capacitor comprises shell (1) and inner core (2); Also comprise the rigid telescopic tube (3) of a closed at both ends, the inside envelope of described telescoping tube (3) has mercury; And one end of described telescoping tube (3) is stretched in described shell (1), axis along described inner core (2) runs through inner core, the other end stretches out described shell (1) outward, forms Multi-section telescopic short tube (31), each section of upper horizontal fixing a slice fin (41) respectively of flexible short tube (31).

2. heat dissipation type high power capacitor according to claim 1, it is characterized in that: the part that described telescoping tube (3) is in described shell (1) inner is non-telescoping, be a rigid pipe, and the port of this rigid pipe flush with the outer surface of the described shell (1) run through by it.

3. heat dissipation type high power capacitor according to claim 1, is characterized in that: each described fin (41) is also distributed with louvre.

4. according to the heat dissipation type high power capacitor in claim 1-3 described in any one, it is characterized in that: described inner core (2) is formed by capacitance electrode paper roll system, and directly with described telescoping tube (3) for standard shaft rolls; Described telescoping tube (3) surface is coated with and is shaped with thermally conductive insulating layer.

5. according to the heat dissipation type high power capacitor in claim 1-3 described in any one, it is characterized in that: described shell (1) is in column, described telescoping tube (3) is coaxial with described shell (1), and the end face that telescoping tube (3) stretches into the inner one end of shell (1) and shell fixes; And on described shell (1) the intensity of that end face that runs through by telescoping tube (3) be obviously weaker than other face of shell.