Connection structure of thermal bulb and PTC (positive temperature coefficient thermistor) in electrothermal actuator

Abstract

The invention provides a connection structure of a thermal bulb and a PTC (positive temperature coefficient thermistor) in an electrothermal actuator, belonging to the technical field of mechanical engineering, solving the problems that the existing PTC thermistor is abutted against the thermal bulb body through a guide line; a gap is existed on two sides of the guide line so that the thermal conductivity between the PTC thermistor and the thermal bulb is reduced; and the temperature raising speed of the thermal bulb is decelerated. In the connection structure of the thermal bulb and the PTC in the electrothermal actuator, the electrothermal actuator comprises a base; the thermal bulb and the PTC are arranged in the base; a conductive contact pin is arranged between the thermal bulb and the PTC; one side surface of the conductive contact pin is abutted against the end surface of the thermal bulb body, while the other side is abutted against one end surface of the PTC; the connection structure comprises a heat-conducting adhesion agent positioned outside the conductive pin; and the thermal bulb body is bonded with the PTC through the heat-conducting adhesion agent. The connection structure of the thermal bulb and the PTC in the electrothermal actuator has the advantages of improving the connection firmness among the thermal bulb body, the PTC and the base, and enhancing the thermal conductivity between the PTC and the thermal bulb body.

Description

technical field [0001] The invention belongs to the technical field of mechanical engineering, and relates to an electrothermal actuator, in particular to a connection structure between a temperature bulb and a PTC in the electrothermal actuator. Background technique [0002] Electrothermal actuator is a device used to remotely control system flow, heat (cooling capacity). Electrothermal actuators are mainly used in floor heating systems to control the closing and opening of pipeline valves; they are specifically used in manifold branch valves, small valves, and dynamic balance valves. Related documents about electrothermal actuators, such as an electrothermal actuator disclosed in Chinese patent literature [Patent No.: ZL200920187875.1, authorized announcement number: CN201513624U], which includes a temperature bulb, an electric heater and a valve seat. Regarding the relevant literature on the temperature package, such as the Chinese patent literature has also disclosed a ...

AI Technical Summary

Problems solved by technology

Obviously one of the connection points is located between the PTC thermistor and the temperature bulb body, which makes the PTC thermistor abut against the temperature bulb body through the wire, so there is a gap on both sides of the wire, so that there is a gap between the PTC thermistor and the temperature bulb. The thermal conductivity decreases, resulting in a slower temperature rise of the temperature bulb, which affects the sensitivity of the electrothermal actuator

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