Dual temperature sensing cutoff circuit protective device

Abstract

The invention discloses a dual temperature sensing cutoff circuit protective device. Two independently-operating temperature sensing cutoff devices, i.e. a thermal induction tripping device and a hot melting breaking device, are arranged between two terminals of a circuit loop; the cutoff is realized by the deformation by being heated and reverse bending tripping of a contact spring of the thermal induction tripping device under the condition that the current is overloaded, the circuit is overheated or the ambient temperature is overhigh; or because the current is overloaded, the circuit is overheated or the ambient temperature is overhigh, when the thermal induction tripping device has no reaction and slow reaction or repeated cutoff and electrifying, and the temperature of the circuit loop continuously rises, the cutoff can be realized after the easily-melt alloy of the hot melting breaking device is melt and broken by being heated to form an open circuit of the circuit loop. The two independently-operating temperature breaking devices respectively and independently sense the temperature, have dual temperature sensing breaking functions and enable the circuit to be cut off in a short time, be electrified again or completely cut off so as to avoid the danger caused by the circuit overheat or short circuit.

Description

technical field [0001] The invention relates to a circuit protection device, in particular to a circuit protection device with double temperature induction power-off Background technique [0002] The use of electricity is an indispensable part of modern human society. All kinds of electrical products and equipment surround our lives, especially computerized and informationized industries, homes, transportation, education, entertainment, etc., are impossible without electricity. In contrast, the safe use of electricity is something that modern people cannot but be cautious about. [0003] Generally speaking, there is a main switch for power control in the overall circuit circuit that provides electricity. Usually the main switch is in the ON state, and a fuse or a breaker is set on it. When too many electrical appliances used in the circuit circuit cause current In the event of overload, short circuit, or overheating of the circuit, the fuse will blow or the circuit breaker ...

AI Technical Summary

Problems solved by technology

[0011] The present invention is to solve the problem that the existing temperature-sensing power-off protector has only one tripping power-off device with contact shrapnel as temperature induction, and cannot effectively set a power-off induction temperature value, and, when the current is overloaded and overheated, if When the contact shrapnel cannot be tripped in real time, the trip is incomplete or cannot be tripped, the circuit will continue to be turned on or repeatedly energized and cut off to generate sparks, resulting in unstable current and causing electronic products to crash, fail to operate normally or shorten the service life. Problems ranging from complete damage to

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