CN2389318Y

CN2389318Y - Electromagnetic induction water heater

Info

Publication number: CN2389318Y
Application number: CN 99242365
Authority: CN
Inventors: 金德奎; 夏志军
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-08-25
Filing date: 1999-08-25
Publication date: 2000-07-26
Anticipated expiration: 2009-08-25

Abstract

The utility model relates to an electromagnetic induction water heater, which comprises a casing, an inner liner, a water inlet pipe, a water outlet pipe, an electromagnetic heating coil and a circuit board. The utility model is characterized in that the heating coil is curved surface-shaped and is positioned below the cylindrical inner liner, wherein, both ends of which are curved surface-shaped. The utility model can be used for induction heating for the cylindrical inner liner, and fundamentally, the utility model can achieve the isolation of water and electricity; when used, the utility model has the advantages of safe operation and high heat efficiency.

Description

Electromagnetic induction water heater

The utility model relates to a kind of device that utilizes the electromagnetic induction principle heat hot water.

In the prior art, the electric heater that uses adopts the direct water-immersed mode of heating of electrothermal tube the earliest, and its fail safe is to guarantee by good grounding measures.Occurred band subsequently again and leaked the electric heater of protection, fail safe is improved, have enterprise to release the water heater that uses ceramic cladding formula electric heating element subsequently again, but this heating element heat transfer time has been long, the heat efficiency is low, and permanent pottery of time also can wear out and break.Above-described product does not all fundamentally solve the problem that water power is isolated, and still exists unsafe factor.

The patent No. is that 93242971.8 utility model patent is that discoid heater coil heats water tank, can not to be shaped as tubular, two ends are curved pressure-proof inner containers heating.Because of its discoid heater coil is plane in the horizontal direction, can only induce eddy-current heating in its nearest with it sub-fraction in bottom for curved inner bag, bigger because of leakage field with the corresponding remainder of heater coil, the eddy current that is induced is less, and caloric value is reduced.

The purpose of this utility model is to provide a kind of electromagnetic induction water heater, and utilizing the principle of induction vortex heating to make to be shaped as tubular, two ends is that water in the curved inner bag is heated.

The technical solution of the utility model is: the utility model comprises shell 1, inner bag 2, water inlet pipe 9, outlet pipe 10, electromagnetic heating coil 4 and circuit board 6.It is characterized in that: heater coil 4 is curved surface shapes, be positioned at be shaped as tubular, two ends be curved inner bag 2 below.When passing through high-frequency current, heater coil produces high-frequency alternating magnetic field, its magnetic line of force acts in the inner bag that contains iron or stainless steel material and forms magnetic loop, make inner bag produce induced current, eddy current just, eddy current produces Jiao Erre by the internal resistance that material had in the inner bag, and this heat energy directly conducts the water of giving in the inner bag.

The utility model has the following advantages compared with prior art:

1, can carry out induction heating to the tubular inner bag, and fundamentally accomplish the water power isolation.Because curved surface shape electromagnetic heating coil does not resemble traditional electric heater heating element and is not placed in the inner bag, but be placed on the inner bag outside below, isolate fully with inner bag, therefore do not have the danger of electric leakage, safe and reliable during use.

2, heat efficiency height is saved electric energy.Owing to adopt the principle of induction vortex heating to make the inner bag heating, so electric conversion efficiency height.

Description of drawings:

Accompanying drawing is the main cutaway view of the utility model vertical structure.

Embodiment of the present utility model:

The utility model is made up of shell 1, inner bag 2, heat-insulation layer 3, electromagnetic heating coil 4, bobbin 5, circuit board 6, electrical equipment shell 7, refractory layer 8, water inlet pipe 9, outlet pipe 10.

Shell 1 usefulness metallic plate is rolled into cylinder, and also available nonmetallic materials such as plastics replace.Inner bag 2 usefulness contain the sheet material manufacturing of iron or stainless steel material, and also available material and the compound sheet material of other material that contains iron or stainless steel material is as steel plate or corrosion resistant plate and the compound sheet material manufacturing of enamel.Its main part is made cylinder, and the two ends punching press forms dome shape, welding fabrication then.Heat-insulation layer 3 adopts the polyurethane foaming.Electromagnetic heating coil 4 is turned to and the identical dome shape of inner bag 2 bottom type shapes after stranded by the multiply enamel covered wire, and is fixed on the bobbin 5.Circuit board 6 is made up of rectification circuit, high-frequency resonant inverter circuit, control circuit and protective circuit.Electrical equipment shell 7 is by injection molding.Refractory layer 8 material for not only having thermal endurance but also have thermal insulation is selected asbestos here for use.

Fixing by the heat-insulation layer 3 of polyurethane foaming between shell 1 and the inner bag 2, the bottom of inner bag 2 is posted refractory layer 8 and is worked to bear the bottom higher temperature, and heat-insulation layer 3 covers refractory layer 8 the inside again.Electrical equipment shell 7 be installed in inner bag 2 below, electromagnetic heating coil 4 be positioned at inner bag 2 below be fixed on the bobbin 5, and be installed on the electrical equipment shell 7.Water inlet pipe 9 is positioned at the bottom and inner bag 2 welding of inner bag 2 and stretches out shell 1, and outlet pipe 10 is positioned at the top and inner bag 2 welding of inner bag 2 and stretches out shell 1.In order to detect the water temperature of inner bag 2, also should on the appropriate location of inner bag, temperature sensor be set in addition, the transducer that prevents anhydrous dry combustion method be installed in electromagnetic heating coil 4 corresponding inner bag bottoms.For the electronic devices and components in the electrical equipment shell 7 are well dispelled the heat, should offer louvre in the appropriate location of electrical equipment shell 7, and the small fan of heat transmission is installed.

More than be the embodiment of the utility model vertical structure.

The utility model is applicable to the horizontal type structure too.In the horizontal type structure, because inner bag is horizontal, the curve form of heater coil is identical with the tubular curve form of inner bag above being positioned at it.Occupation space when hanging Yin in order to reduce, inner bag also can be made flat drum shape, as long as the curved surface of heater coil is identical with it.Consider the moulding of product design, the electrical equipment shell also can be placed in other position, as is placed on the side of inner bag, is connected with lead with heater coil.

No matter be vertical structure or horizontal type structure, electromagnetic heating coil also can directly be fixed on the inner bag bottom by refractory layer and heat-insulation layer, but and between the inner bag good insulation performance will be arranged.

Claims

A kind of electromagnetic induction water heater comprises shell 1, inner bag 2, water inlet pipe 9, outlet pipe 10, electromagnetic heating coil 4 and circuit board 6, it is characterized in that: electromagnetic heating coil 4 is the curved surface shape, be positioned at be shaped as tubular, two ends be curved inner bag 2 below.