Dry heating protection control method for liquid electric heater
A technology of electric heater and control method, which is applied in the direction of fluid heater, lighting and heating equipment, etc. It can solve the problems of uncertain protection time, high protection temperature, slow response of mechanical thermostat, etc., and achieve accurate control of dry burning time , Reduce the requirements for control accuracy and save the effect of temperature sensors
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[0011] The present invention will be further described below in conjunction with embodiments.
[0012] A control method for dry-burning protection of a liquid electric heater includes the following steps:
[0013] A. Install a temperature controller on the liquid electric heater, connect the temperature controller in series with the heater heating element and the control relay, and set up detection modules to detect its on-off at both ends of the temperature controller;
[0014] B. The microprocessor is controlled by the program. When starting the heating of the liquid heater, it first performs a short-term heating program, that is, the heating element of the heater is heated for a short time, and then the heating is stopped for a short time; the time for short-term heating and stopping Determine according to the power of the heating element itself, the volume and density of the heating element, the specific heat capacity of the heating element, and the temperature to be protected;
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