Electromagnetic water heater

Abstract

The invention discloses an electromagnetic water heater which comprises a shell for accommodating various components. The shell at least accommodates a heating water disc, an induction coil corresponding to the heating water disc, a water pipe and a circuit device, the water pipe is connected with the heating water disc, and the circuit device is connected with the induction coil. The electromagnetic water heater is characterized in that the heating water disc is provided with an upper water cover and a lower water cover, and a heating plate is arranged between the upper water cover and the lower water cover; a water tank is arranged on the upper water cover and / or the lower water cover respectively; and the upper water cover and the lower water cover are made of nonmetal materials, and the heating plate is made of magnetic-permeable metal materials. The heating water disc is made of nonmetal materials, so that the requirement on heat insulation is met, and structural strength of the electromagnetic water heater is improved.

Description

technical field [0001] The invention relates to a water heater, in particular to an electromagnetic water heater. Background technique [0002] Electromagnetic water heaters have a number of invention patents, most of which are induction coils set around the water pipes, so the water pipes and induction coils are in a small three-dimensional space. When the water pipe leaks, the water can easily touch the circuit and cause unsafe electricity use. The heating element in Chinese patent 200410013500.5 is in contact with water on one side, and the heat generated by the other side of the heating element will radiate to the induction coil, increasing the temperature rise of the coil and reducing the thermal efficiency. Chinese patent 200810123605.4 The use of metal materials for the water container to withstand water pressure is not conducive to heat preservation. When using non-metallic materials, it is necessary to increase the wall thickness or increase ribs and other reasons t...

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Problems solved by technology

[0002] Electromagnetic water heaters have a number of invention patents, most of which are induction coils set around the water pipes, so the water pipes and induction coils are in a small three-dimensional space. When the water pipe leaks, the water can easily touch the circuit and cause unsafe electricity use.

The heating element of Chinese patent 200410013500.5 is in contact with water on one side, and the heat generated by the other side of the heating element will radiate to the induction coil, increasing the temperature rise of the coil and reducing the thermal efficiency

Chinese patent 200810123605.4 The use of metal materials for the water container to withstand water pressure is not conducive to heat preservation. When using non-metallic materials, it is necessary to increase the wall thickness or increase ribs and other reasons to increase the distance between the coil and the heating body and increase the magnetic resistance of the magnetic circuit. Large, not conducive to high-frequency electromagnetic conversion

In addition, because there is no direction for the water flow, the heat exchange between the heating element and the water is disordered, and the water temperature at the water outlet is not the highest water temperature in the container, which is not conducive to the output of energy

[0003] Generally, the power of the water heater is relatively large, and the electromagnetic cooker is relatively mature in technology after years of operation in the market. The supply of appliances and accessories is convenient and cheap, but the power of the electromagnetic cooker is generally around 2kW, and when multiple high-power frequency conversion circuits work at the same time, they are not related to each other. After superposition of oscillation circuit waveforms, instantaneous high voltage will be randomly generated, which will easily damage sensitive devices (such as IGBT tubes, etc.) and cause interference to the power grid.

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