Delay reset current sensitive type thermal protector

Abstract

The invention discloses a delay reset current sensitive type thermal protector, and relates to the design technical field of the delay reset current sensitive type thermal protector with temperature and current control and protection functions and applied to motors of domestic appliances, such as a dust collector, a soybean milk machine, a juicer and the like. The delay reset current sensitive type thermal protector comprises two bottom plates, a shell, heating wires, a movable contact, a static contact, a fixed plate, a dual-metal sheet and insulating paper, wherein limiting grooves are formed in the two side edges of the shell respectively; riveting ears matched with the limiting grooves are arranged on the two sides of the two bottom plates respectively; the riveting ears are clamped in the corresponding limiting grooves respectively; a thermal sensitive ceramic sheet is arranged on the external top of the shell; and the thermal sensitive ceramic sheet is fixed on the shell through a spring clamp. The delay reset current sensitive type thermal protector is high in sensitivity, installation stability and safety, and capable of satisfying use requirements in a variety of fields.

Description

technical field [0001] The invention relates to the design technical field of a delayed reset current sensitive thermal protector applied to the temperature and current control and protection of home appliance motors such as vacuum cleaners, soybean milk machines, and juice extractors. Background technique [0002] Similar products on the market use bimetallic overcurrent to achieve the effect of enhancing the sensitivity of current sensing. Due to the limited matching of bimetallic materials, relying on bimetal alone will inevitably lead to low current induction of the product, and the applicable current range is limited. Moreover, the riveting surfaces of the bottom plate and the shell riveting lugs of similar products are all flat, which will inevitably affect the stability and riveting strength of the riveting assembly between the bottom plate and the shell. When the temperature drops, the product will automatically reset and the circuit will be closed. If the abnormali...

AI Technical Summary

Problems solved by technology

[0002] Similar products on the market use bimetallic overcurrent to achieve the effect of enhancing the sensitivity of current sensing. Due to the limited matching of bimetallic materials, relying on bimetal alone will inevitably lead to low current induction of the product, and the applicable current range is limited. Moreover, the riveting surfaces of the bottom plate and the shell riveting lugs of similar products are all flat, which will inevitably affect the stability and riveting strength of the riveting assembly between the bottom plate and the shell. The product will automatically reset when the temperature drops, and the circuit will be closed

If the abnormality of the circuit is not eliminated in time, the product will be reset and closed, which is very likely to cause damage to the circuit

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