Electromagnetic Heater Based on Programmable Logic Controller

Abstract

The invention discloses an electromagnetic heater based on a programmable logic controller. The electromagnetic heater comprises an electromagnetic heater body and an automatic control device; the electromagnetic heater body comprises a rectifying device, an inverter, an electromagnetic coil and a heating sheet; the automatic control device comprises the programmable logic controller, a thermistor, a constant current source, a power supply, a relay and an external power supply; and the programmable logic controller comprises a voltage measurement module, a counting module and a control module, the voltage measurement module is used to measure a voltage of two ends of the thermistor, the counting module is used to calculate a frequency of the fact that the voltage measured by the voltage measurement module reaches a preset threshold, and the control module is used to control the relay to be disconnected when the frequency calculated by the counting module reaches a preset frequency. The electromagnetic heater based on the programmable logic controller adopts an electromagnetic heating mode, and has higher heat efficiency than a heater adopting a traditional resistance heating mode and a heater adopting a traditional microwave type heating mode; the problem of circulation heating, caused by a forgetting or unattended condition, of an electromagnetic heater is effectively solved through arrangement of the automatic control device, and loss, caused by the circulation heating, of the electromagnetic heater is prevented.

Description

technical field [0001] The invention relates to an electromagnetic heater, in particular to an electromagnetic heater based on a programmable logic controller. Background technique [0002] Energy shortage has become an important problem restricting my country's economic development. Coal accounts for 66% of the current primary energy consumption in my country. At present, the dominant heating method in my country is still coal-based centralized heating. In the annual coal consumption, heating coal consumption accounts for nearly half. Resources, such as coal resources, water resources, and heat energy lost in the transmission process, followed by environmental pollution. Therefore, innovating heating methods and adopting new heat sources are of great significance for reducing energy consumption, protecting the environment, and building a conservation-oriented society. [0003] Electric heater is an internationally popular high-quality and long-life electric heating equipm...

AI Technical Summary

Problems solved by technology

At the same time, the existing electric heaters can automatically cut off the circuit to stop heating when the temperature reaches a certain temperature, and can restart heating when the temperature is lower than a certain temperature. However, because the heating time of the electric heater is too long, people often Forget about the electric heater that is heating, which will cause the temperature of the electric heater to drop for a period of time after heating, and it will be reheated again, which will consume electric energy and shorten the service life of the electric heater, and there will be safety hazards such as fire

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