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Recoverable fuse based on thermoelectric and magnetothermal effects

A magnetocaloric effect and fuse technology, applied in the direction of circuits, electrical components, emergency protection devices, etc., can solve problems such as poor fuse effect, and achieve the effect of avoiding line impact damage and overload damage to the line

Pending Publication Date: 2021-08-06
盛东风
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of poor fuse effect in the prior art, and propose a resettable fuse based on thermoelectric and magnetocaloric effects

Method used

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  • Recoverable fuse based on thermoelectric and magnetothermal effects
  • Recoverable fuse based on thermoelectric and magnetothermal effects

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Effect test

Embodiment

[0021] refer to Figure 1-2 , a resettable fuse based on pyroelectric and magneto-caloric effects, including a housing 1, a pair of electric poles 2 are fixed on the inner wall of the housing 1, a connecting plate 4 is connected to the inner wall of the housing 1 through a return spring 3, and a connecting plate 4 is fixed on the inner wall of the housing 1 The side wall of the electromagnet 5 and the casing 1 is provided with a pair of air supply holes 7 and a pair of exhaust holes 8, the inside of the exhaust holes 8 is provided with a check valve, and the inside of the casing 1 is provided with a heat preservation mechanism and a time delay mechanism.

[0022] The thermal insulation mechanism includes a conductive column 13 embedded in the inner wall of the shell 1. The two ends of the conductive column 13 are fixed with a heat block 14 and a cold block 15 respectively. The transfer of heat inside and outside to avoid overcooling and overheating.

[0023] The time-delay me...

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Abstract

The invention discloses a recoverable fuse based on thermoelectric and magnetothermal effects. The recoverable fuse comprises a shell; a pair of power connection columns are fixed on the inner wall of the shell; the inner wall of the shell is connected with a power connection plate through a reset spring; an electromagnet is fixed on the inner wall of the shell; a pair of air supplementing holes and a pair of exhaust holes are formed in the side wall of the shell; one-way valves are arranged in the exhaust holes; a heat preservation mechanism and a time delay mechanism are arranged in the shell; and the heat preservation mechanism comprises a conductive column embedded in the inner wall of the shell, and a hot block and a cold block are fixed to the two ends of the conductive column respectively. According to the recoverable fuse, the electromagnet and the power connection plate are arranged; when a circuit is overloaded, the magnetic field intensity generated by the electromagnet is increased, so that the magnetic attraction effect of the electromagnet on the power connection plate is enhanced, the power connection plate overcomes the elastic force of the reset spring to move downwards, and then the two power connection columns are disconnected; and therefore, self-power-off protection is completed, and circuit damage caused by overload is avoided.

Description

technical field [0001] The invention relates to the technical field of line protection, in particular to a resettable fuse based on pyroelectric and magnetocaloric effects. Background technique [0002] Fuses are widely used in high and low voltage power distribution systems and control systems, as well as electrical equipment. As short circuit and overcurrent protectors, fuses are one of the most commonly used protection devices. [0003] Existing fuses use the high temperature caused by large currents to achieve power-off protection. They are composed of recoverable and non-recoverable fuses, which are controlled by heat. First, the response speed is slow, even if the overload current is reached. It still needs a certain trigger time, and there is a certain risk when a high current such as a short circuit occurs, and the existing resettable fuse cannot effectively identify overload and short circuit, so it is not smart enough and not convenient to use. Contents of the in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H85/05H01H85/143
CPCH01H85/05H01H85/143
Inventor 盛东风
Owner 盛东风
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