CN2274315Y

CN2274315Y - Electromagnetic-induction heater

Info

Publication number: CN2274315Y
Application number: CN 96248027
Authority: CN
Inventors: 姚巨臣
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-10-09
Filing date: 1996-10-09
Publication date: 1998-02-11
Anticipated expiration: 2006-10-09

Abstract

The utility model relates to an electromagnetic-induction heater for water, which comprises an iron core, an energizing coil, an inner water pipe, an outer sleeve barrel and a water accumulator. The energizing coil is uniformly distributed in the interlayer of a pipe-type iron core heating body which is enclosed both internally and externally, the inner water pipe is sheathed in the pipe-type iron core heating body, the outer sleeve barrel is sheathed outside the pipe-type iron core heating body, a through opening which is arranged on the outer sleeve barrel is communicated with a hot water accumulator, and a conducting wire pipe is arranged on the top of the pipe-type iron core heating body. The utility model has the advantages of small volume and light weight; the utility model which is arranged in water can be switched on for heating as safely and conveniently as electric heating pipes, and the heat efficiency can reach more than 95%.

Description

Electromagnetic induction heater

The utility model relates to a kind of device to liquid warming, specifically is the electromagnetic heater technical field of water.

Ferromagnet can produce induced-current, i.e. current vortex in the body in alternating magnetic field.Ferromagnetic resistance is more little, and induced-current will be big more, and then produces very high Joule heat.According to the frequency of induction heating current, existing electromagnetic stove can be divided into two kinds of power frequency and high frequencies.Power frequency electromagnetic stove main member has iron core, magnet exciting coil, range panel and pot body; The main member of high-frequency electromagnetic kitchen range has excitation group, fm voltage circuit, range panel, pot body and radiator fan.When having alternating current to pass through in the coil, around coil and the excitation group of being formed unshakable in one's determination, will produce alternating magnetic field, after the ferromagnetism pot body that is in excitation group top receives alternating magnetic field, will in the pot body, produce induced-current, thereby make a pot body heating, produce fuel factor.Electromagnetic stove has characteristics such as the less heating of volume is very fast, but because the excitation group of electromagnetic stove is what to separate with ferromagnetism pot body, the two also is separated with range panel, therefore, the magnetic resistance of electromagnetic stove magnetic circuit and leakage field loss are inevitably, must have influence on its operating efficiency thus.

The purpose of this utility model is to overcome the shortcoming of prior art, and the electromagnetic heater of a kind of excitation group and one unshakable in one's determination is provided.

The purpose of this utility model is achieved by the following technical solution.

Magnet exciting coil is evenly distributed in the inside and outside airtight tubular type heater interlayer unshakable in one's determination, suit one inner conduit in the tubular type heater unshakable in one's determination, tubular type heater unshakable in one's determination is with outer sleeve outward, has port to be communicated with hot water accumulator on it, and a conduit is established on tubular type heater unshakable in one's determination top.

Above-mentioned inner conduit lower end outer wall and tubular type heater inner face unshakable in one's determination lower end closely is connected, and communicates opening the interior space of aperture between with the two on the inner conduit hypomere wall, and this top, space has notch to communicate with the outer sleeve space.

Can be shaped on external screw thread in the lower end of inner conduit, cooperate nut to be used for fixing tubular type heater unshakable in one's determination.

Outer chimb can be established in the top of above-mentioned outer tube, is used for being suspended in the accumulator.

Inside and outside tubular type heater ingot iron unshakable in one's determination, cross section is identical, and magnet exciting coil can select for use polyester-imide enamel insulated round copper wire or polyester enamel insulated round copper wire to make on the polyester-imide wire frame.

Operation principle of the present utility model is as follows:

Power supply is connected in water inlet more earlier, and the alternating magnetic field that magnet exciting coil produces can be constrained in the tubular type heater unshakable in one's determination and do closed circulation, and produces induced-current, and Joule heat takes place; Water enters from inner conduit is suitable for reading, enters outer sleeve from end opening, enters interior space from aperture, and water (flow) direction is heated rapidly in the inside and outside space of tubular type heater unshakable in one's determination to down up, and hot water flows out from the outer sleeve upper port, enters accumulator.

Also can utilize prior art to install control water valve additional, connect power supply when utilizing contact switch control water inlet at the inner conduit water inlet.

The utility model volume is little, and is in light weight, can be as the energising heating in the water of inserting of electrothermal tube safe ready; In the transfer process of electricity and heat, not only conduction heat and photothermal loss, and also the leakage field loss also can be ignored; ＂ copper loss ＂ and ＂ iron loss ＂ that the excitation group of existing electromagnetic stove exists in the excitation process become the useful thermal source to the water heating in the utility model.Because water heats in magnetic field, there is certain relaxation effect in magnetic field to the sediment of calcium in the water, can reduce the heater encrustation; Current are evenly distributed on the inside and outside surface of tubular type heater unshakable in one's determination, form thin water layer, form forced-convection heat transfer under the pressure effect of water, the forced-convection heat transfer of water is than the high 1.5-15 of NATURAL CONVECTION COEFFICIENT OF HEAT times, and the thermal efficiency of the present utility model can reach more than 95%.

The utility model is described in further detail below in conjunction with drawings and Examples.

Fig. 1 is the utility model internal structure profilograph.

Fig. 2 is the utility model internal structure A-A drawing in side sectional elevation.

Fig. 3 is that the utility model decomposes back core part vertical view.

Wherein, 1. magnet exciting coil, 2. inner iron core is 3. outer unshakable in one's determination, 4. rubber gasket, 5. nut, 6. inner conduit, 7. outer sleeve, 8. port, 9. conduit, 10. water inlet, 11. delivery ports, 12. aperture, 13. notches, 14. hot water accumulators, 15. outer chimbs, 16. dewatering outlets.

Embodiment: structure such as Fig. 1 Fig. 2 are shown in Figure 3.

Inside and outside tubular type heater ingot iron DT4 unshakable in one's determination, cross section is identical, with rubber gasket 4 and nut 5 airtight being fixed as one, inner iron core 2 wall thickness 6mm, outer 3 walls unshakable in one's determination are thin slightly, and inside and outside tubular type heater unshakable in one's determination is all through preservative treatment; Magnet exciting coil 1 is housed in its interlayer, selects for use polyester-imide enamel insulated round copper wire QZY-1 on the polyester-imide wire frame, to make.Magnetic potential logical (WI) is 4500 ampere-turns, about tubular type heater surface thermal load unshakable in one's determination 5.0W/CM2; Suit one inner conduit 6 in the tubular type heater unshakable in one's determination is water inlet 10 on it, and the pipe lower end is uncovered be delivery port 11, and water flows into the space of 7 of outer iron core and outer tubes thus, and this spatial joint clearance is 2mm; Open the interior space of four apertures 12 between in symmetry on the inner conduit hypomere wall and communicate with the two, this spatial joint clearance 2.5mm, its top has notch 13 to communicate with the outer sleeve space, is shaped on external screw thread in the lower end of inner conduit, cooperates nut to be used for fixing tubular type iron core heater.Tubular type heater unshakable in one's determination is with outer sleeve 7 outward, and its upper end has port 8 to be communicated with hot water accumulator 14, and a conduit 9 is established on tubular type heater unshakable in one's determination top, and the lead-in wire of coil is drawn thus and connect power supply.Outer tube 7 usefulness common engineering plastics are made, and chimb 15 outside having above outer tube 7 is used for being suspended in the accumulator.

Claims

1. electromagnetic induction heater, comprise iron core, magnet exciting coil, it is characterized in that, magnet exciting coil is evenly distributed in the inside and outside airtight tubular type heater interlayer unshakable in one's determination, suit one inner conduit in the tubular type heater unshakable in one's determination, tubular type heater unshakable in one's determination is with outer sleeve outward, has port to be communicated with hot water accumulator on it, and a conduit is established on tubular type heater unshakable in one's determination top.

2. electromagnetic induction heater as claimed in claim 1, it is characterized in that, described inner conduit lower end outer wall and tubular type heater inner face unshakable in one's determination lower end closely is connected, and communicates opening the interior space of aperture between with the two on the inner conduit hypomere wall, and this top, space has notch to communicate with the outer sleeve space.