Electromagnetic heating method and device in electric water heater

Abstract

The present invention relates to an electromagnetic heating method of electric water heater and its device. Said method is characterized by that under the action of alternating current it utilizes electromagnetic coil to produce alternating magnetic field, said alternating magnetic field can utilize insulating stand and magnetic conductive metal water tube to produce loop, and utilize shielding magnetic ring to make magnetic field line have directivity and can prevent electromagnetic leakage, in the magnetic conductive metal water tube winded into a certain form said magnetic field line can be formed into vortex induced current, and the energy of said electric current can be converted into heat energy by means of resistor in the magnetic conductive metal tube interior. Said device includes electromagnetic coil, insulating stand, magnetic conductive metal water tube, shielding magnetic ring and frequency variable control circuit.

Description

technical field [0001] The invention relates to the technical field of daily life electrical appliances, in particular to an electromagnetic heating method and device for an electric water heater. Background technique [0002] In foreign countries, the induction cooker has developed into a mature and safe product, and it has been in the market for a long time. However, it is still not common to apply it to water heaters. I hereby analyze the various problems of water heaters on the market as follows: One is that the water heater uses gas as energy. The heating method, because it can be used for instant heating, and the water output is not limited, is still the mainstream commodity in the market; but because of its danger, carbon monoxide poisoning or gas explosion accidents are heard every year. How to use electric heating It is the key to eliminate hidden dangers by replacing the gas heating method; the second is a thermal storage electric water heater; using a water contai...

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Problems solved by technology

[0002] In foreign countries, induction cooker has developed into a mature and safe product, and it has been on the market for a long time; however, it is still not common to apply it to water heaters. The various problems of water heaters currently on the market are analyzed as follows: One is that water heaters use gas as energy. The heating method, because it can be heated instantly in use, and the water output is not limited, so it is still the mainstream product in the market; but because of its danger, accidents of carbon monoxide poisoning or gas explosion are often heard every year. How to use electric heating The key to eliminate hidden dangers is to replace the gas heating method; the second is a heat storage electric water heater; using a water container to store water for heating, the power consumption is not too large, which is acceptable, but it cannot be used for instant heating, and it must wait for the cold water to be heated to It can only be used at the applicable temperature, and the water output is also limited. If it is used continuously, when the stored hot water is used up, cold water will be discharged next, and it is very likely to catch a cold in the middle of the shower; the third is the instant electric Water heater; this product also has electromagnetic products, but there are problems with the heating method and structure, and there is no frequency conversion to increase the frequency, so that the thermal efficiency becomes larger; therefore, the power consumption is still as high as 3KW ~ 8KW; this kind of high current product, Due to the limited capacity of ordinary households, installation is not easy and sales are limited. Even if it can be installed, the electricity bill is a heavy burden due to the large power consumption

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