temperature sensitive controller

Abstract

The invention relates to a temperature sensitive controller. The temperature sensitive controller comprises a main casing, a fixing plate fixedly mounted on the main casing and a temperature-sensitive bimetallic actuator fixedly mounted on the fixing plate, wherein a back-side annular groove of the main casing is internally equipped with multiple concentric cylinder annular electrodes, the concentric cylinder annular electrodes are connected with corresponding multiple wiring sheets mounted on the front surface of the main casing, one or more wiring sheets is provided with a contact switch, a self-locking assembly of the contact switch is further comprised, and the self-locking assembly comprises a seat type support arranged on the main casing in a rotation mode and a ]-shaped limited member arranged on the seat type support in a suspension mode. According to the temperature sensitive controller, cooperation of the seat type support and the a ]-shaped limit member and influence of self gravity are employed to realize the self locking function of the contact switch, the self locking assembly internally has no torsion spring member, influence of elastic force of the torsion spring member and the curvature position can be avoided, the torsion spring technology requirement problem can be effectively avoided, the insertion depth requirement of the self locking assembly for a lower connector is low, and the technology requirements of parts are substantially reduced.

Description

technical field [0001] The invention relates to a temperature-sensitive controller, in particular to a temperature-sensitive controller for electric tea sets. Background technique [0002] Existing electric tea sets with anti-dry heating or other functions mainly include: temperature-sensitive controllers, thermistors, electric heating elements, circuit boards, power supplies, and the like. The electric heating element and the thermistor are in the body of the kettle, and the temperature sensitive controller, the electric heating element, and the power supply are connected to the circuit board. Send data to the integrated circuit on the circuit board to control the pull-in and disconnection of the relay, so as to realize the electric heating of the electric heating element and disconnect the power supply. The thermistor cannot work and cut off the power when there is no water, so the general anti-dry heating is mainly used to control the connection between the electrical co...

AI Technical Summary

Problems solved by technology

However, after the electric heater is powered off, the temperature of the container drops, the thermosensitive bimetallic actuator resumes its action, and the ejector pin also resets under the action of the elastic force of the moving contact piece, so that the moving contact piece contacts the electrical connector, and the circuit loop leads When it is turned on, the electric heating element is energized again to generate heat. This cycle will cause the electric tea set to be switched on and off continuously, which not only reduces the contact life between the moving contact piece and the contact of the electrical connector, that is, the contact switch. If it is too long, it will cause damage to the contacts. Once the contacts are fused together, it will cause a fire, which will seriously affect the safety and life of the product.

In order to avoid the occurrence of the above phenomena or to achieve other functions, the current electric tea set appliances generally use torsion springs to control the contact switch action. However, it has strict and precise requirements for the position, distance and torque of the two ends of the torsion spring. Different specifications of temperature sensitive control The position distance and torque of the torsion spring of the device are different, which causes a very large mismatch rate, and the waste of the torsion spring is huge

Furthermore, there is a problem of insertion depth between the lower connector and the temperature-sensitive controller. Once the depth of the lower connector is not enough, the contact switch function of the torsion spring will not be realized. The temperature-sensitive controller with this structure is universal. very low match

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