CN2807128Y

CN2807128Y - Electric heater for heating liquid

Info

Publication number: CN2807128Y
Application number: CN 200520012328
Authority: CN
Inventors: 王建军
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-04-03
Filing date: 2005-04-03
Publication date: 2006-08-16
Anticipated expiration: 2015-04-03

Abstract

The utility model relates to an electric heater for heating liquid, which is composed of electric heating wires on an inner layer, insulating heat conductor materials on a middle layer, a metal casing on an outer layer and more than one layers of insulating heat conductor materials added outside the metal casing or more than one layers of insulating heat conductor materials and a metal casing which are added simultaneously. The safety of the electric heater for preventing electric leakage is increased.

Description

The electric heater of liquid heating usefulness

Affiliated technical field

The utility model relates to a kind of electric heater of liquid heating usefulness, especially has the liquid electric heater for heating of double-deck above insulation.

Background technology

The electric heater of seen in the market liquid heating usefulness is made up of as the metal shell of insulating heat-conduction material such as the magnesia powder of insulation usefulness and outer field stainless steel or copper etc. the heating wire of internal layer, intermediate layer.Heating wire energising back release heat, insulating heat-conduction material by the intermediate layer such as magnesia powder etc. are passed to metal shells such as outermost stainless steel or copper and are used to add hot water or wet goods liquid medium, satisfy the various heating purposes of people.Since between the metal shell of outermost stainless steel or copper etc. and the heating wire of innermost layer across one deck insulating heat-conduction material such as magnesia powder, in case the metal shell breakage occurs, be corroded or just might cause the electric leakage accident during situation such as insulating heat-conduction material damp failure, security is lower.

Summary of the invention

Has only one deck insulating heat-conduction material in order to overcome in the existing liquid electric heater for heating, in case the metal shell breakage, be corroded or insulating heat-conduction material lost efficacy and just might cause the lower deficiency of security of electric leakage, the utility model provides a kind of liquid electric heater for heating, in case the metal shell breakage takes place, be corroded or can not cause electric leakage during the insulating heat-conduction material failure conditions at once, make people have an opportunity to change the generation that electric heater is avoided the electric leakage accident.

The purpose of this utility model is to realize like this, a kind of liquid electric heater for heating is made up of the heating wire of internal layer, the insulating thermal conductor material and the outer field metal shell in intermediate layer, it is characterized in that increasing the insulating thermal conductor material more than one deck again in the outside of metal shell or increases insulating thermal conductor material and metal shell more than one deck simultaneously.Like this, electric heater just can work as outermost metal shell damaged or be corroded after, the inside also has a metal shell and is subjected to metal shell to protect intact one deck insulating thermal conductor material, avoids the generation of electric leakage accident; On the other hand if during one deck insulating thermal conductor material failure situation, also have another layer insulating heat-conduction material and may be in serviceable condition, so just improved electric heater and prevented the security of leaking electricity.

Actual effect of the present utility model is, owing to increase the insulating thermal conductor material more than one deck in the outside of metal shell again or increase insulating thermal conductor material and metal shell more than one deck simultaneously, improved that electric heater prevents because metal shell breakage, the security that is corroded or leaks electricity during one deck insulating thermal conductor material failure, made people's replacing electric heater before the electric leakage accident takes place of having an opportunity.

Description of drawings

Below in conjunction with drawings and Examples the utility model is further specified.

Fig. 1 is the structural representation of the utility model first embodiment.

Fig. 2 is the local amplification profile schematic diagram of the structure of the utility model first embodiment.

Fig. 3 is the structural representation of the utility model second embodiment.

Fig. 4 is the local amplification profile schematic diagram of the structure of the utility model second embodiment.

Fig. 5 is the structural representation of overlooking of the utility model the 3rd embodiment.

Fig. 6 is the structural representation of the utility model the 3rd embodiment.

Fig. 7 is the local amplification profile schematic diagram of the structure of the utility model the 3rd embodiment.

1. electrodes among the figure, 2. fluid sealant, 3. primary insulation magnesia powder, 4. inner layer metal shell, 5. heating wire, 6. enamel insulating barrier, 7. outer layer insulation magnesia powder, 8. outer metal shell, the 9. tubular shape after the heating tube brake forming of forming by electrode, heating wire, fluid sealant, primary insulation magnesia powder, inner layer metal shell and outer layer insulation magnesia powder.

The specific embodiment

In first embodiment of Fig. 1, be directly just to form liquid heating electrothermal tube behind the enamel 6 on the metal shell 4 with the electrothermal tube of liquid seen on market heating usefulness with double insulating layer 3,6.When 3 inefficacies of interior oxidation magnesium powder insulating barrier or 4 breakages of inner layer metal shell,, just can avoid the generation of electric leakage accident like this, improve the anti-creeping security of electrothermal tube owing to also have the existence of external insulation layer 6.

In second embodiment of Fig. 2, earlier electrode 1, heating wire 5 electrical couplings are put into inner layer metal shell 4 with primary insulation magnesia powder 3 in the back well, and then it is put into outer metal shell 8 moulding with outer layer insulation magnesia powder 7.Respectively primary insulation magnesia powder 3, outer layer insulation magnesia powder 7 are sealed with temperature resistant encapsulation glue 2 at last.For convenient formation inner layer metal shell 4 can adopt copper or aluminum manufacturing.

In the 3rd embodiment of Fig. 3, put into mould after employing changes the enamel insulating barrier 6 among first embodiment of Fig. 1 insulating oxide magnesium powder 7 into and curves certain type shape 9 on demand and cast out metal shell 8, with temperature resistant encapsulation glue 2 insulating oxide magnesium powder 7 is sealed again at last with special external form.

Second and third embodiment not only has the safe effect identical with first embodiment, but also owing to Duoed a layer metal shell than first embodiment, so second and third embodiment is with safety and reliability.

Claims

1. the electric heater of liquid heating usefulness is made up of the heating wire of internal layer, the insulating thermal conductor material and the outer field metal shell in intermediate layer, it is characterized in that increasing in the outside of metal shell the insulating thermal conductor material more than one deck again.

2. the electric heater of liquid heating usefulness according to claim 1 is characterized in that: outside the insulating thermal conductor material of each layer the layer of metal shell is arranged all.