Induction heater with closed magnetic circuit
A technology of closed magnetic circuit and induction body, used in induction heating, water heaters, fluid heaters, etc., can solve the problems of difficult driving, core loss, large magnetic leakage, etc., and achieve low cost, small thermal inertia, and magnetic resistance. small effect
Pending Publication Date: 2016-04-13
朱筱杰
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Problems solved by technology
Chinese patent application CN201420655892 winds the induction coil on the water tank, although induction heating can be realized, but the use of an open magnetic circuit structure has disadvantages such as difficult driving and large radiation
Chinese patent application CN200620083771 uses an I-shaped magnetic core and a spiral water pipe to form a closed magnetic circuit, and Chinese patent application CN201510362215 uses an E-shaped magnetic core and a water tank wall to form a closed magnetic circuit. Although it has been improved to a certain extent, there are still problems of large magnetic flux leakage and magnetic core loss. question
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Embodiment Construction
[0027] The specific implementation of the fully closed magnetic circuit induction heater proposed by the present invention will be further described below in conjunction with the accompanying drawings.
[0028] figure 1 It is embodiment 1 proposed according to the present invention. As shown in the figure, the inside of the water tank (1) and the coil tube (2) are both hollow, and the inside is connected and filled with water. The water tank (1) and the coil tube (2) jointly constitute the induction body, both of which are made of ferritic stainless steel 430 with ferromagnetism. Obviously, they form a closed magnetic circuit and become the iron core of the coil. The coil (3) is wound around the coil tube (2). When a high-frequency current is passed through it, a high-frequency magnetic field is induced in the closed magnetic circuit formed in the water tank (1) and the coil tube (2), thereby generating eddy current heating , to heat the water in it. The water inlet (4) and...
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The invention provides an induction heater with a closed magnetic circuit. The closed magnetic circuit is formed by a container or a water pipe of a heating part of the induction heater. Vortex is formed in the container or the water pipe in a magnetic field induction manner for heating, and therefore liquid such as water and oil in the container or the water pipe is heated. Compared with a traditional electric heater, the induction heater has the following beneficial effects that firstly, indeed liquid-electricity separation is achieved through a magnetic field, and safety is very high; secondly, the heating area is large, the power density of a heating surface is small, the temperature is low, the damaging effects such as decomposing of oil are low, and generated scale of water is little; thirdly, the container or the water pipe emits heat by itself, the heating delay is short, and temperature control is easy; and fourthly, the magnetic circuit is closed, so that outward radiation is little, and efficiency is high. The induction heater can be widely used for heating liquid such as oil, water, acid-bases and chemical raw materials in the industry and can also be used for gas heating. The induction heater can be widely used for manufacturing instantaneous heating type and water storage type electric water heaters, other electric water heaters and water boilers for civil use.
Description
technical field [0001] The invention relates to an electric heating device, in particular to a heater which uses electromagnetic induction to generate eddy current to heat fluid. Background technique [0002] Usual electric heater is to utilize resistance wire to energize and generate heat to carry out heating, and its structure is to wear a resistance wire in a metal tube, therebetween is filled with magnesium chloride powder for insulation. Due to thermal expansion and contraction during heating, the magnesium chloride powder may become loose, and the resistance wire directly contacts the metal tube, thereby causing an electric leakage accident. Therefore, there are always potential safety hazards in this structure, and auxiliary technologies such as anti-electric walls are needed to improve safety. Furthermore, due to the isolation of the magnesium chloride powder, the delay in heat transfer is relatively large, and the heat pipe will wait a while to heat up when it is p...
Claims
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IPC IPC(8): F24H1/00F24H9/18H05B6/02
CPCH05B6/02F24H1/0018F24H9/1818H05B2206/02F24H2250/08
Inventor 朱筱杰
Owner 朱筱杰