Snap-action thermostat with duplex structure

Abstract

A snap-action thermostat with a duplex structure comprises a temperature controlled snap-action thermostat, a over-temperature-protection snap-action thermostat and a stainless steel elastic retaining clip. The two snap-action thermostats are provided with unilateral installation baseboards; a batten for the stainless steel elastic retaining clip, a left side jaw and a right side jaw, a front side locating plate and a rear side locating plate are elastically connected with the outer side surfaces of the shells of the snap-action thermostats in a clamped mode. It is ensured that each metal cover of the snap-action thermostats is closely attached to the temperature sensing face of a electric heating appliance which is matched with the snap-action thermostats. Compared with a single installation, the duplex structure enables the mounting position size and spatial volume of the snap-action thermostats to be reduced by 50%, the rate of finished products can achieve 100%, and production cost will be greatly reduced.

Description

technical field [0001] The present invention relates to the technical field of jump-type temperature controllers, in particular to a jump-type temperature controller with a dual structure. Background technique [0002] For some small household electric heating appliances such as electric kettles, coffee pots, ovens, household toasters, etc., it is necessary to install a jump thermostat for fixed-point temperature control and a jump thermostat for over-temperature protection at the same time, because it is suitable for installation The location and space are too small to be able to install the above two jump-type thermostats on the same temperature-sensing surface at the same time. From top to bottom, the temperature control sudden jump thermostat consists of a cover, a bimetal disc, an action rod, a fixed contact, a moving contact, a moving contact bracket, an insulating shell, an insulating cover, front and rear two Side terminals and long and short rivets are assembled. T...

AI Technical Summary

Problems solved by technology

There is a certain relationship between the pressure of the moving contact and the qualified rate of the operating temperature range. When the pressure of the moving contact is too high, it will prolong the time for pushing the moving contact when the bimetal disc jumps; when the pressure of the moving contact is too small , it will cause the bimetallic disc to be slightly deformed during the energy storage process, and the moving and fixed contacts will be slightly separated, resulting in long-term arcing and shortening the life of the contacts

Practical experience shows that the pressure between a pair of moving and fixed contacts must be between 0.3 and 1N, and the pressure between the two sets of moving and fixed contacts of the above-mentioned integrated duplex jump thermostat cannot be all At the same time, this pressure requirement is met, which is related to the dimensional error of the part, the dimensional error of the installation position, the operation error, etc.

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