CN2418643Y

CN2418643Y - Energy-saving electromagnetic heater

Info

Publication number: CN2418643Y
Application number: CN 00229965
Authority: CN
Inventors: 赵孟杰
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-05-22
Filing date: 2000-05-22
Publication date: 2001-02-07
Anticipated expiration: 2010-05-22

Abstract

The utility model relates to a novel energy-saving electromagnetic heater, which belongs to a device which changes electric energy into heat energy; the utility model is composed of a frequency converter, a power-compensation capacitor and a heating element. The heating element which is made from a coil and a magnetoconductivity system generates induction electric potential to make a conductor generate heat under the action of alternating current by the principle of induction. The heating device has the characteristics of high-speed rise in temperature, less power consumption, high heat efficiency, etc.

Description

The novel energy-conserving electromagnetic heater

The utility model relates to a kind of electric heater unit, especially has the electromagnetic heater of saving electric energy.

Present electric heater, tool mostly are to adopt, the mode of electric furnace heating wire, Electric radiant Heating Film, the heating of electrothermal tube constant resistance.And the resistance heating mode, the heat efficiency that is converted to heat energy by electric energy is lower, and power consumption is big, programming rate is slow.

The purpose of this utility model provide a kind of have of many uses, the electromagnetic heater of heat efficiency height, quick heating, little power consumption.

The utility model is achieved in that the principle of utilizing electromagnetic induction, a magnetic conductor is inserted in the coil made from the electric furnace filament winding, forms an induction heater.When alternating current feeds coil, just produce alternating flux in the coil, make the magnetic conductor that places in coil produce induced potential, and the formation eddy current, the magnetic conductor heating, and electric furnace heating wire can produce resistance heat simultaneously, two kinds of heat energy additions, heater is heated up rapidly, is the electric weight of resistance-type heating so equally, produces the heat that is higher than several times of resistance-type heatings.

Do detailed explanation below in conjunction with accompanying drawing:

Fig. 1 connection diagram of the present utility model

Fig. 2 open circles column type of the present utility model calandria structural representation

Fig. 3 hollow semi-circular calandria structural representation of the present utility model

1. frequency converter 2. building-out capacitors 3. heaters 4. coils 5. magnetic conductors 6. insulating heat conductive coating 7. insulating material 8. shells 9. partiting thermal insulation shells

With reference to Fig. 2 magnetic conductor (5) is a hollow cylinder, and cylindrical puts the coil (4) with electric furnace filament winding system, forms the induction heater, and magnetic conductor (5) surface will be coated with the coatings (6) of the high heat conduction of last layer.In order to improve heat transference efficiency, satisfying under the process conditions of expanding with heat and contract with cold, close-coupled between coil (4) and the magnetic conductor (5), do not stay the gap as far as possible.Magnetic conductor (5) is selected high permeability, low resistance material for use, so that heater (3) can produce very strong magnetic flux under the alternating current situation, thereby produces the high induced electromotive force and the high heat efficiency.Producing another main essential condition of the high heat efficiency is supply frequency, and different heater heat temperature raisings is to the frequency requirement difference of power supply.Frequency converter (1) is raised to the work frequency of 50HZ in the intermediate frequency range according to different heaters, makes heater (3) be in high electromagnetic induction state, forms eddy-current heating.And electric furnace heating wire produces resistance heat simultaneously, is the electric weight of resistance-type heating so equally, produces the heat that is higher than several-fold resistance-type heating.Thereby played the effect of heat efficiency height, quick heating, little power consumption.Because the load of induction heating belongs to inductive load, between frequency converter (1) and heater, be connected building-out capacitor (2), to improve power factor, further reach energy-conservation purpose.Building-out capacitor (2) can be one or more, and the connected mode between the capacitor is for being connected in parallel.

In order to satisfy different heating objects, magnetic conductor (5) can be arbitrary shape such as circular, square, but must be hollow or matrix, so as to make heating object in magnetic conductor (5) hollow or the matrix face be heated.Fig. 3 is that hollow semi-circular calandria structural representation is compared except that shape is different with Fig. 2, and its shell is partiting thermal insulation shell (9), and available high strength glass ceramic body is made an integral body.The heater of this shape is suitable for the electric heating device in the electric cooking appliances such as electric cooker, electric frying pan, electric chafing dish.And the heater of column type is fit to the electric heating device in electric heater, the electric heater.

Claims

1. a novel energy-conserving electromagnetic heater is made up of frequency converter (1), building-out capacitor (2), heater (3), it is characterized in that: heater (3) is the coil (4) with electric furnace filament winding system, is built-in with a magnetic conductor (5) at coil (4) and forms.

2. a kind of novel energy-conserving electromagnetic heater according to claim 1 is characterized in that: satisfying insulation between coil (4) and the magnetic conductor (5), close-coupled under the process conditions of expanding with heat and contract with cold is not stayed the gap as far as possible.

3. a kind of novel energy-conserving electromagnetic heater according to claim 1, it is characterized in that: the shape of magnetic conductor (5) can be arbitrary shapes such as square, circle, but the centre must be hollow or spill, so that heating object is heated in hollow or in the matrix face.

4. a kind of novel energy-conserving electromagnetic heater according to claim 1 is characterized in that: the whole surface of magnetic conductor (5) scribbles insulating heat conductive coating (6).

5. a kind of novel energy-conserving electromagnetic heater according to claim 1 is characterized in that: building-out capacitor (2) is one or more, and the connection aspect between the capacitor is for being connected in parallel.