Method for heating phase-change material heat storage unit adopting PTC thermistor

Abstract

The present invention develops a method of heating phase-change material heat reservoir by a PTC thermistance and uses PTC thermistance (positive temperature coefficient thermistance) with the property of temperature sensibility; when the PTC thermistance excess a certain temperature, the resistance value of the PTC thermistance increases by step phase to resist current to pass through, thereby achieving the aim of stopping the phase-change material heat reservoir. The phase-change material heat reservoir is positioned on the upper part of the PTC thermistance heater; the power supply of the PTC thermistance is switch on to heat the phase-change material heat reservoir; the power supply of the PTC thermistance is cut off till the external temperature display of the phase-change material heat reservoir reaches the predetermined temperature. The phase-change material heat reservoir is moved to the lower part of the object which need to heat; the phase-change material in a container is changed to a solid state from a liquid state after heat release to achieve the aim of heating objects. The invention solves the problem that the heating temperature of the phase-change material heat reservoir keeps between the melting point temperature and the boiling point temperature of the phase-change material, thereby ensuring the safety of use and enlarging the using range of the phase-change material heat reservoir.

Description

technical field [0001] The invention relates to a method for heating a heat storage device of a phase change material, in particular to a method for heating a heat storage device of a phase change material by using a PTC thermistor. Background technique [0002] The latest phase-change material heat storage device, such as the Chinese patent No. 200520056663.1, the announcement No. CN2779325, and the utility model patent name: "A kind of energy storage block that can realize heat exchange". There is a phase change material inside, and its working principle is that after being heated by an external heater, the phase change material in the container changes from a solid state to a liquid state after absorbing heat, and when an object is heated as needed, the phase change material in the container changes from a liquid state The state turns into a solid state after exothermic. The disadvantage of the above method is that it cannot accurately control the external heating temper...

AI Technical Summary

Problems solved by technology

The disadvantage of the above method is that it cannot accurately control the external heating temperature of the phase change material in the container from the solid state to the liquid state after absorbing heat. If the external heating temperature exceeds the boiling point of the phase change material, accidents are likely to occur