Variable-frequency electromagnetic heating device

Abstract

The invention discloses a variable-frequency electromagnetic heating device. The variable-frequency electromagnetic heating device comprises a hot water tank and a heating piece, and is characterized in that: a water inlet pipe, a water level detector, a pressure detector and a temperature detector are arranged at the upper end of the hot water tank; a water return pipe and a hot outlet pipe are arranged at the end on one side of the hot water tank; a hot water outlet pipe is connected with the heating piece; a heating device used for heating circulating water is connected out of the hot water tank through a diversion pipe; the heating device comprises a metal pipe and an electromagnetic induction heating coil; the electromagnetic induction heating coil is sleeved on the outer surface of the metal pipe; a diversion pump is arranged in the diversion pipe; and a control circuit for controlling the circulating water through the water level detector, the pressure detector, the temperature detector, the electromagnetic induction heating coil and the diversion pump is fixed to the hot water tank. The variable-frequency electromagnetic heating device performs circulation external heating on water, is safer in structure, reduces cost, prolongs service life, and achieves an energy-saving effect; and when a group of electromagnetic induction coils fail, other coils cannot be influenced, so that the system can be used normally and is convenient to use.

Description

technical field [0001] The invention relates to a heater, in particular to a variable frequency electromagnetic heater. Background technique [0002] Existing heater kind is a lot, as: electric heater, gas heater etc. Electric heaters currently on the market generally use resistance wires (or metal wires) as heating elements, and put them in direct contact with water. By energizing the resistance wires (or metal wires), they generate current, and the electric energy is generated by the resistance wires (or metal wires). or wire) into Joule heat, which heats the water. But there are following disadvantages: one: the resistance wire (or metal wire) is directly put into the water, and the time is permanent, and it is inevitable that the surface of the resistance wire (or metal wire) will not be rusted, causing electric leakage, and there is a potential safety hazard. And resistance wire (or metal wire) is very easily damaged in humid environment, makes the life-span of heater...

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Problems solved by technology

But there are following disadvantages: one: the resistance wire (or metal wire) is directly put into the water, and the time is permanent, and it is inevitable that the surface of the resistance wire (or metal wire) will not be rusted, causing electric leakage, and there is a potential safety hazard. Moreover, the resistance wire (or metal wire) is easily damaged in a humid environment, which greatly shortens the life of the heater; second: the resistance wire (or metal wire) needs to consume a lot of energy for heating

The gas heater uses burning gas as a heating element. The cost of gas is high, the structure is relatively complicated, and although the service life is long, because the gas wastes more heat energy during use, the utilization efficiency of the heat energy is reduced, which further causes gas heating. waste, and there are many electromagnetic induction heaters on the market. Although they start to save energy, most of them are not easy to maintain and affect the system work.

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