CN201072220Y

CN201072220Y - Electric water heater

Info

Publication number: CN201072220Y
Application number: CNU2007201210712U
Authority: CN
Inventors: 纪宏光
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-06-26
Filing date: 2007-06-26
Publication date: 2008-06-11
Anticipated expiration: 2017-06-26

Abstract

The utility model relates to a water heater, which comprises an insulating casing body, electric-proof walls respectively arranged at the inlet opening and the outlet opening of the insulating casing body, and a heater installed in the insulating casing body; the insulating casing body comprises a main body and an end cover arranged on the main body, an inlet opening and an outlet opening are arranged at the both ends of the main body, a plurality of heating cavities are arranged in the main body, through holes are arranged among the heating cavities, and the two heating cavities at the outermost side are respectively communicated with the inlet opening and the outlet opening; the heater is arranged in the heating cavity, the heater comprises a heating body and insulating bodies arranged on the edge at the periphery of the heating body, the heating body comprises two electrode plates and a semiconductor ceramic heating piece, and the semiconductor ceramic heating piece is arranged between the electrode plates and is electrically connected with the electrode plates. The utility model has the characteristics that the utility model can prevent the electric energy loss of the idle current, the heating temperature is low, and the thermal efficiency is high, etc., the liquid uniformly flows through the surface of the electrode plate, and liquid short flow and partial overheating phenomena can not generated. Electric-proof walls are arranged through the inlet opening and the outlet opening of the insulating casing body, and the potential safety hazard of liquid being electrified is overcome, therefore, the utility model is an electric water heater which has simple structure, is secure and high-efficient, and has long service life.

Description

Electric heater

Technical field

The utility model relates to a kind of electric heater, especially a kind of instant electric water heater.

Background technology

Existing instant electric water heater adopts heating wire to heat as heater mostly, and it places heating wire in the stainless steel tube, fills magnesia between heating wire and steel pipe, make heat-generating pipe, heat-generating pipe is placed container, yet, because the heat conductivility of magnesia is poor, and cause heating wire overheated in pipe easily, the fusing of generation heating wire, phenomenons such as booster, influence is normally used, make that thus the product thermal efficiency is low, and service life is short.For addressing this is that, adopt the directly exposed mode that in the liquid liquid is heated of inserting of heating wire, but because liquid stream is unstable, reasons such as the interior inflation of pipeline cause heating wire to be easy to damage, therefore, though this method has obtained the higher thermal efficiency, service life is still shorter.

The utility model content

The purpose of this utility model provides a kind of electric heater, adopt simple in structure, the thermal efficiency is high, the heater of long service life, and heater is installed on after the heating chamber, can form the continuous U-shaped pipeline that water supply stream passes through, so that heating process steady and smooth more, and be equipped with Fang Dianqiang in import and outlet, and safe and reliable to guarantee it, thus its long service life made.

For achieving the above object, the technical scheme that the utility model adopted is: a kind of electric heater comprises insulation shell, is located at the Fang Dianqiang of insulation shell import and outlet and be installed on heater in the insulation shell respectively; Insulation shell comprises body and is located at end cap on the body, and the body two ends are located in import and outlet, are provided with several heating chambers in the body, are provided with through hole between the heating chamber, and outermost two heating chambers are communicated with outlet with import respectively; Heater is arranged in the heating chamber, and heater comprises heater and be located at the insulator of heater edge, and heater comprises two battery lead plates, and semiconductive ceramic heating sheet, and semiconductive ceramic heating sheet is located between two battery lead plates and with battery lead plate and is electrically connected.

In sum, liquid produced the waste of electric energy that idle current causes because of electric conductivity around electric heater of the present utility model can significantly reduce, and liquid evenly flows through the heating element electrode plate surface, can not produce short stream of liquid and hot-spot phenomenon.By import and export two ends at insulation shell anti-electric wall is set, overcome the charged potential safety hazard of liquid, it is big that its heater has a heating area, thermal efficiency height, can be in air characteristic such as long-time dry combustion method, be a kind of electric heater of simple in structure, efficient, long service life.

In order further to understand feature of the present utility model and technology contents, see also following about detailed description of the present utility model and accompanying drawing, yet appended graphic only provide with reference to and the explanation usefulness, be not to be used for the utility model is limited.

Description of drawings

Below in conjunction with accompanying drawing,, will make the technical solution of the utility model and other beneficial effects apparent by the specific embodiment of the present utility model is described in detail.

In the accompanying drawing,

Fig. 1 is the stereogram of the utility model electric heater;

Fig. 2 is the profile of the 2-2 direction of Fig. 1;

Fig. 3 is the fragmentary cross-sectional view of the 3-3 direction of Fig. 1;

Fig. 4 is the fragmentary cross-sectional view of the 4-4 direction of Fig. 1;

Fig. 5 is the fragmentary cross-sectional view of the 5-5 direction of Fig. 1;

Fig. 6 is the stereogram of end cap;

Fig. 7 is the three-dimensional exploded view of heater;

Fig. 8 is the constitutional diagram of Fig. 7; And

Fig. 9 is the profile of the 9-9 direction of Fig. 8.

The specific embodiment

Below in conjunction with accompanying drawing the utility model is described in detail.

Shown in Fig. 1-6, the utility model electric heater comprise insulation shell 2, two be located at respectively the anti-electric wall 3 of the import 21 of insulation shell 2 and outlet 23, and several be installed on heater 4 in the insulation shell 2.Insulation shell 2 is made by high-temperature insulation bakelite material, and it comprises that body 20 and several are located at the end cap 22 on the body 20, and import 21 is located at body 20 two ends with outlet 23.Be provided with several heating chambers 24 in the body 20, be provided with through hole 25 between the heating chamber 24, outermost two heating chambers 24 are communicated with outlet 23 with import 21 respectively; Heater 4 is arranged in the heating chamber 24, and the opening part of each heating chamber is equipped with end cap 22.

Body 20 is by the injection mo(u)lding of high-temperature insulation bakelite, and its left end is established import 21, and right-hand member sets out mouth 23, and several heating chambers 24 are established in its inside, import 21, outlet 23 and several heating chambers 24 that are communicated with by through hole 25; Heating chamber 24 is cuboid, its two side is provided with a pair of groove 27 from openend extension downwards, this groove 27 keeps a segment distance with the bottom of heating chamber 24, this heater 4 can be contained in heating chamber 24 this in the groove 27, in heating chamber 24, form U-shaped passage 26 whereby, when heater 4 is packed heating chamber 24 into, its both sides and groove 27 fasten, groove 27 plays fixed heater 4, the both sides of heater 4 and lower surface and heating chamber wall constitute U-shaped passage 26, U-shaped passage 26 is communicated with through hole 25, forms a continuous liquid flowing channel in insulation shell, plays heating and circulating liquid.

See also Fig. 7-9 simultaneously, heater 4 comprises heater 40 and is located at the insulator 41 of heater 40 edges.Heater 40 comprises two metal electrode boards 42, five chip semiconductor ceramic heating plates 44 and insulation filler 46.Metal electrode board 42 can be made of copper, makes sheet with impact style, and the extension of one end is provided with terminals 43, establishes connecting hole 432 on terminals 43.Each battery lead plate 42 is provided with the thermal treatment zone 45, and it exposes and is provided with and is surrounded by insulator 41.Semiconductive ceramic heating sheet 44 is arranged at intervals between two battery lead plates 42 and with battery lead plate 42 and electrically connects.Five chip semiconductor ceramic heating plates 44 are sheet, thickness is 2mm, it is clamped between the two plate electrode plates 42, be arranged in parallel, each other at interval certain space, the area of battery lead plate 42 be greater than the area of five chip semiconductor

ceramic heating plates

44, and 42 of two plate electrode plates remove semiconductive ceramic and generate heat the sheet 44, the space is still left in its edge, and insulation filler 46 is filled in the space.Semiconductive ceramic heating sheet 44 be semistor (Positive TemperatureCoefficient, PTC).Insulation filler 46 is resin glue or insulation silica gel, and it is used to fill the remaining space except that semiconductive ceramic heating sheet 44 takes up space between the two plate electrode plates 42.

Insulator 41 is sealedly attached to the edge on battery lead plate 42 surfaces of heater 40, and this insulator 41 comprises a pair of first insulating part 47 of being located at battery lead plate 42 both sides, is located at the 3rd insulating part 49 that battery lead plate 42 has second insulating part 48 of terminals 43 1 ends and is located at battery lead plate 42 other ends.First insulating part 47 is strip, and it is provided with U-lag 472 and is short strip shape to accommodate heater 40, the three insulating parts 49, and its inboard is provided with groove 492 to accommodate heater 40.Second insulating part 48 is stepped, and its bigger end is provided with installing hole (not shown) and accommodates the ora terminalis of heater 40 with sealing, and a less end is provided with two perforation 482 that are communicated with installing hole to be passed through with terminals 43 for heater 40 respectively.Insulator 41 is made by pottery, and the junction of itself and heater 40 is filled with fluid sealant (not shown).The size of insulator 41 and width that battery lead plate 42 is covered thereof are by the electric conductivity decision of institute's heating liquid, the liquid high to electrical conductivity, the thickness of ceramic block and wideer to the width of metal electrode board 42 coverings, heater 40 after insulator 41 sealings leaves certain area in metal electrode board 42 surfaces uncovered area is beneficial to high efficiency and heat radiation to form the thermal treatment zone 45.This insulator 11 also can be made by insulated paint or insulating cement.

Heater 4 is packed into behind the heating chamber 24, and second insulating part, 48 less ends of heater expose heating chamber 24, and end cap 22 is provided with a mating holes 222 to accommodate a less end of this second insulating part 48.End cap 22 is tightly connected with the body 20 of heater 4 and insulation shell 2.End cap 22 is provided with fluid sealant with the junction of heater 4, and end cap 22 is fixedly connected on the body 20 by screw 29, and is provided with sealing ring between the body 20 of end cap 22 and insulation shell 2.

Anti-electric wall 3 can be existing anti-electric wall, its role is to utilize the liquid self-resistance to reduce the voltage of anti-electric wall import and export liquid, and when lowering liquid and linking to each other with human body, the electric current of the human body of flowing through.In the present embodiment, anti-electric wall 3 comprises a body of wall 32 and is located at the lid 34 at body of wall 32 two ends, forms the pipeline 36 of certain-length by body of wall and lid, thereby can play the effect of anti-electric wall.Anti-electric wall 3 one ends in left side link to each other with import 21, and the other end links to each other with water inlet pipe (not shown), and anti-electric wall 3 one ends on right side link to each other with import 23, and the other end links to each other with outlet pipe (not shown).

During heating, current flow into from water inlet pipe, by the import 21 of flowing through of the pipeline 36 of anti-electric wall 3, enter insulation shell 2, in insulation shell 2, through the heating of several heating chamber 24 internal heaters 4, flow through outlet 23, the anti-electric wall 3 of opposite side flow out temperature required hot water by outlet pipe thereupon.The power of the heater 4 in the heating chamber 24 can adopt prior art to regulate.

The utlity model has following advantage:

One, owing to all fills out in the space except the semiconductive ceramic sheet takes up space between two metal electrodes Expired high-temperature insulation material, and around heater, sealed, overcome to a great extent Because of the formed electricity that between electrode, produces by liquid of the faint electric conductivity of some liquid (such as water) Stream, the energy loss of having avoided this part electric current to cause;

Two, to have a heating temp low for the semiconductive ceramic heater that adopts of the utility model, can be in air Long-time dry combustion method and the characteristic such as not damaged, thus this heating element can be unstable because of liquid stream, do not inflate in the liquid Etc. phenomenon and cause heating element to damage;

Three, the liquid flowing channel that is formed by a plurality of U-shaped channel connections that adopts of the utility model can make liquid The body uniform-flow is crossed the heating element electrode plate surface, has avoided the short stream of liquid and hot-spot, makes heating process flat Surely smoothly, the thermal efficiency is higher.

Four, the part metals electrode directly is exposed in the water, its radiating efficiency is carried than alternate manner is obvious Height can increase the utilization rate to heat energy, and significantly improves the thermal efficiency of heating element, as for the part metals electricity Extremely directly be exposed to make in the liquid the charged and Electrical Safety hidden danger that causes of liquid by adopt insulation shell and Combine to overcome with anti-electric wall technology;

Five, because the heating temp of semiconductive ceramic heater is low, therefore the requirement of the resistance to elevated temperatures of the insulation shell that liquid is flowed through is not high relatively, can reduce the manufacturing cost of this container.

The above; for the person of ordinary skill of the art; can make other various corresponding changes and distortion according to the technical solution of the utility model and technical conceive, and all these changes and distortion all should belong to the protection domain of claim of the present utility model.

Claims

1. an electric heater is characterized in that, comprises insulation shell, is located at the Fang Dianqiang of insulation shell import and outlet and be installed on heater in the insulation shell respectively; Insulation shell comprises that body and several are located at the end cap on the body, and the body two ends are located in import and outlet, are provided with several heating chambers in the body, are provided with through hole between the heating chamber, and outermost two heating chambers are communicated with outlet with import respectively; Heater is arranged in the heating chamber, and heater comprises heater and be located at the insulator of heater edge, and heater comprises two battery lead plates and semiconductive ceramic heating sheet, and semiconductive ceramic heating sheet is located between two battery lead plates and with battery lead plate and is electrically connected.

2. electric heater according to claim 1, it is characterized in that, described heater comprises several pieces semiconductive ceramic heating sheets, it is intervally installed between two battery lead plates, except that semiconductive ceramic heating sheet takes up space, being formed with the space between two battery lead plates, in this space, be filled with insulation filler.

3. electric heater according to claim 1 is characterized in that, described battery lead plate in the form of sheets, the one end extends and to be provided with terminals, establishes connecting hole on terminals.

4. electric heater according to claim 1 is characterized in that each battery lead plate is provided with the thermal treatment zone, and it exposes and is provided with and is surrounded by insulator, and this insulator is made by insulated paint or insulating cement.

5. electric heater according to claim 1, it is characterized in that, described insulator is made by pottery, be tightly connected with electrode plate surface, this insulator comprises a pair of first insulating part of being located at the battery lead plate both sides, is located at the 3rd insulating part that battery lead plate has second insulating part of terminals one end and is located at the battery lead plate other end; First insulating part is strip, it is provided with U-lag to accommodate heater, second insulating part is stepped, its bigger end is provided with installing hole is accommodated heater with sealing ora terminalis, a less end is provided with two perforation that are communicated with installing hole to be passed through to supply the terminals of heater respectively, the 3rd insulating part is short strip shape, and its inboard is provided with groove to accommodate heater.

6. electric heater according to claim 5 is characterized in that, the less end of second insulating part of heater exposes heating chamber, and end cap is provided with a mating holes to accommodate a less end of this second insulating part.

7. electric heater according to claim 1, it is characterized in that, the two side is provided with a pair of groove from openend extension downwards in the described heating chamber, the bottom of this groove and heating chamber keeps a segment distance, these heater both sides of the edge be contained in heating chamber this in the groove, in heating chamber, form the U-shaped passage whereby, connect, in whole insulation shell, form a continuous liquid flowing channel of forming by a plurality of U-shaped passages by the through hole between the heating chamber.

8. electric heater according to claim 1 is characterized in that the body of end cap and heater and insulation shell is tightly connected, and insulation shell is made by high-temperature insulation bakelite material.

9. electric heater according to claim 8 is characterized in that the junction of end cap and heater is provided with fluid sealant, and end cap is fixedly connected on the body by screw, and is provided with sealing ring between end cap and insulation shell body.

10. electric heater according to claim 1 is characterized in that, semiconductive ceramic heating sheet is a semistor.