Servo voltage regulation type temperature control device and method of electric blanket or electric heating kang

Abstract

A servo voltage regulation type temperature control device of an electric blanket or an electric heating kang is provided with a single-chip microcomputer system serving as a main body, and the single-chip microcomputer system comprises a voltage-reduction rectifying power supply 1, a keyboard set 3 and a displayer unit 6. The servo voltage regulation type temperature control device is characterized in that a single-chip microcomputer 4 is connected with an electrically-erasable nonvolatile memory 5, an INT end of the temperature control device is connected with a zero crossing detector 2, an AD input port of the temperature control device is connected with a temperature sensor 7, one output end of the temperature control device is connected with a control electrode G of a silicon controlled rectifier 9 through an optical coupler 8, the silicon controlled rectifier 9, a load and a power supply form a return circuit, a set temperature S is set through the keyboard set 3, instant temperature signals J of the load are collected through the temperature sensor 7, and instant temperatures J and the set temperature S are compared through programming so as to judge the instant temperatures J are lower than or equal to or higher than the set temperature S. Trigger delay time of the silicon controlled rectifier in each power supply period from zero crossing to triggering is prolonged or shortened according to the judgment results, the effective value of the average voltage exerted on the load is changed, and the curve of the practical temperature is the same as the curve of the set temperature.

Description

technical field [0001] The invention relates to an electrothermal temperature control device and a control method. Specifically, it relates to a follow-up pressure-regulating temperature control device and control method for electric blankets or electric kangs. Background technique [0002] At present, electric blankets and electric kangs made of heating elements such as electric heating film, carbon fiber electric heating, electric heating plate, electric heating wire (for convenience of description, hereinafter referred to as load) have been widely used. [0003] At present, the temperature control methods mainly include the following types: [0004] One is to use a manual method, which is to turn on the load for a period of time before going to bed, and then turn off the power supply after reaching a certain temperature or turn the control switch to the half-wave power supply position. [0005] One is the intermittent on-off control method of the upper and lower limits....

AI Technical Summary

Problems solved by technology

Although the voltage level can be adjusted and the voltage range can be changed, this adjustment must be done manually, rather than by changing the load voltage according to the instant temperature signal provided by the temperature sensor, so once it is set at a certain position, Its output voltage will not change at any time. It actually belongs to the multi-level constant temperature control method. When the load insulation condition is good and the power-on time is long, there will be temperature accumulation phenomenon, and the instant temperature will be higher than the set temperature, so that Dry mouth and poor comfort

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