CN2456101Y

CN2456101Y - External electric water heater

Info

Publication number: CN2456101Y
Application number: CN 00260771
Authority: CN
Inventors: 李国伟
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-12-29
Filing date: 2000-12-29
Publication date: 2001-10-24
Anticipated expiration: 2010-12-29

Abstract

The utility model relates to an electric water heater, which comprises a housing, an inner liner, a heat-insulating layer, an electric heating element, a water inlet pipe, a water outlet pipe, and an electric control circuit. The utility model is characterized in that the shape of the electric heating element is identical to the shape of a cross section of the inner liner; the electric heating element is attached to the outer wall of the inner liner. The electric heating element is not contacted with water directly, so the electric water heater solves the problems of the existing electric heating pipe of easy damage, water penetration, and low safety degree. In addition, a flange in a shape like the Chinese character 'gong' of a cylinder of the inner liner is provided with a concave trough; the four diamond-shaped inclined surfaces of a rubber sealing ring are tightly attached to the concave trough of the flange in the shape like the Chinese character 'gong'. When is subjected to high water pressure, the electric water heater can play a good role in sealing. The sealing performance of the utility model is better than a welded inner liner.

Description

Add thermoelectric water heater

The utility model relates to a kind of electric heater.

Existing electric heater, its basic structure comprises shell, inner bag, electric heating tube, heat-insulation layer and electrical control circuit, wherein electric heating tube is located in the inner bag, because the friendshipization of water temperature, interior pressure increases, and infiltration is leaked easily, for preventing seepage, need to be provided with sealing device at electric heating tube and inner bag junction, complex structure, sealing ring is yielding and cause seepage; On the other hand because electric heating tube directly contacts heating with water, the surface solidification of electric heating tube a large amount of incrustation scales, and easy to clean not, cause that thermal conductivity descends, heat is difficult to be passed in the water, insulating barrier goes bad and directly causes damage, even cause the tube wall explosion, infiltration, the electric leakage phenomenon of hurting sb.'s feelings, inner bag generally adopts the material of corrosion resistant plate or ordinary carbon steel plate in addition, has intercrystalline corrosion in its weld seam, crackle occurs, getting rusty appears in the commissure in use for some time, explosion and cause leaking, data shows according to statistics, and its spoilage accounts for more than 40% of sum, and the short life of product has only some months.

The purpose of this utility model is to provide that a kind of electrical heating elements does not contact with water, inner bag bears the hydraulic pressure height, does not leak, the electric heater of homogeneous heating, safe, long service life, to overcome the deficiency of prior art.

The purpose of this utility model is to realize like this, comprise shell, inner bag, heat-insulation layer, electrical heating elements, water inlet pipe, outlet pipe, electric control circuit, the shape of electrical heating elements is identical with the shape of the cross section of inner bag, and the bag be attached on the outer wall of inner bag, together be coated in the heat-insulation layer.

The shape of cross section of inner bag is rounded, oval, square or trapezoidal; Inner bag is to be formed by two cylindrical shell butt joints that have end socket, and the I shape flange place on the cylindrical shell is provided with concave groove, is connected by securing member and sealing ring between the cylindrical shell.

Two electrical heating elements bags are affixed on the cylindrical shell; Heating element heater is the external-heat electric heating coil; The shape of sealing ring cross section is polygon; The inboard of sealing ring is provided with the lip limit.

The utility model compared with prior art has following advantage:

1. simple in structure, easy to manufacture, can reduce production costs greatly and user's use cost, solved the problem that the welded type inner bag leaks easily.

2. the external-heat electric heating coil heats water temperature, replace electric heater for heating, this kind structure electrical heating elements does not contact with water, no fouling, the phenomenon of can not occur boring a hole, explosion, infiltration, electric leakage being hurted sb.'s feelings, the safe coefficient height, the life-span is improved 5-7 doubly, exempted simultaneously owing to cause the frequent problem of replacing electrical heating elements after the electrical heating elements fouling, had the characteristics of low surface loading, long working life, good insulation preformance in addition;

3. Electrothermal ring can be applicable to that cross section is the inner bag of different shape;

4. the cylindrical shell of forming inner bag is that whole punching press is made, I shape flange place on its cylindrical shell is provided with concave groove, and employing ring-type rhombus rubber seal, under the effect of securing member coupling mechanism force, four inclined-planes of its rubber seal diamond shaped and the concave groove at I shape flange place fit tightly, excellent sealing performance is arranged when being subjected to high hydraulic pressure, and the leak resistance of inner bag is better than the welded type inner bag greatly.

Below in conjunction with drawings and Examples the utility model is described in further detail:

Fig. 1 is a structural representation of the present utility model.

Fig. 2 is the left view of Fig. 1.

Fig. 3 is the assembling schematic diagram of inner bag and rubber seal.

Fig. 4 is a rhombus sealing ring cross sectional representation.

Fig. 5 is the assembling schematic diagram of circular inner bladder and electrical heating elements.

Fig. 6 is the left view of Fig. 5.

Fig. 7 is the assembling schematic diagram of square inner bag and electrical heating elements.

Fig. 8 is the left view of Fig. 7.

Fig. 9 is the assembling schematic diagram of trapezoidal inner bag and electrical heating elements.

Figure 10 is the left view of Fig. 9.

Embodiment one:

As shown in Figure 1, 2, a kind of electric heater, comprise shell 1, inner bag 2, heat-insulation layer 5, electrical heating elements 6, water inlet pipe 8, outlet pipe 7, electric control circuit, the shape of electrical heating elements 6 is identical with the shape of the cross section of inner bag 2, and bag is attached on the outer wall of inner bag 2 filling heat insulating wall 5 between inner bag 2 and the shell 1.

Shown in Fig. 3,4,5,6, inner bag 2 is to be formed by two circular cylinder bodies 11 butt joint, at first makes the circular cylinder body 11 that has end socket and I shape flange 12 during manufacturing, makes on the I shape flange 12 that " (" shape groove is used to install rubber seal 9, and its cross section is

, connect by securing member 10 between two circular cylinder bodies 11; During assembling four of the rubber seal diamond shaped inclined-planes and flange 12 places " (" groove fits tightly under the effect of securing member pretightning force, can seal well when being subjected to 1.3MPa hydraulic pressure; The effect of leaking that stops is played on the lip limit 13 of rubber seal inboard equally in addition.

The shape of electrical heating elements 6 is suitable with the circular cylinder body 11 of forming inner bag 2, and two electrical heating elements 6 are for annular and bag are attached on the surface of two circular cylinder bodies 11, and electrical heating elements 6 is external-heat electric heating coils; It is made up of insulating heat-conductive layer, electric heating layer, thermal insulation layer and metal shell, after the energising heating outer wall of heat by circular cylinder body 11 is passed in the water, and water is heated; Temperature controller 3, temperature limiter 4 are loaded on the outer surface of inner bag, and the maximum temperature of water is controlled and limited to water temperature, stop dry combustion method.Inlet tube and outlet tube is arranged in parallel in the cross section of inner bag, and outlet pipe 7 passes shell 1 and is loaded in the inner bag 2, and its height is a little less than the top of inner bag, and outlet pipe 7 outer ends are connected with mixed water valve; Establish safety valve on the water inlet pipe 8 and communicate with mixed water valve, inlet tube and outlet tube and the welding of inner bag junction and do not have leakage mix water valve and by delivery hose deployed hot water are delivered to spray equipment.

Embodiment two:

Shown in Fig. 7,8, except that inner bag, electric heating coil, shell were different from first embodiment, other structure all was identical; Inner bag 2 is square, and two square electric heating coil bags are attached on the square cylinder 11 of forming inner bag.

Embodiment three:

Shown in Fig. 9,10, except that inner bag, electric heating coil, shell are different from first embodiment, second embodiment beyond, other structure is all identical; Inner bag 2 is trapezoidal, and two trapezoidal electric heating coil bags are attached on the trapezoidal cylindrical shell 11 of forming inner bag.

Said structure is made similar variation all to be fallen within the protection domain of the present utility model.

Claims

1, a kind ofly adds thermoelectric water heater, comprise shell, inner bag, heat-insulation layer, electrical heating elements, water inlet pipe, outlet pipe, electric control circuit, it is characterized in that: the shape of electrical heating elements (6) is identical with the shape of inner bag cross section, and the bag be attached on the outer wall of inner bag (2), together be coated in the heat-insulation layer (5).

2, electric heater according to claim 1 is characterized in that: the shape of cross section of inner bag (2) is circular, oval, square or trapezoidal.

3, according to claim 1ly add thermoelectric water heater, it is characterized in that: inner bag (2) is to be formed by two cylindrical shell (11) butt joints that have end socket, I shape flange (12) on the cylindrical shell locates to be provided with concave groove, is connected by securing member (10) and sealing ring (9) between the cylindrical shell (11).

4, according to claim 3ly add thermoelectric water heater, it is characterized in that: two electrical heating elements (6) bag is attached on the cylindrical shell (11).

5, describedly add thermoelectric water heater according to claim 1 or 4, it is characterized in that: electrical heating elements (6) is the external-heat electric heating coil.

6, according to claim 3ly add thermoelectric water heater, it is characterized in that: the shape of sealing ring (9) cross section is polygon.

7, according to claim 6ly add thermoelectric water heater, it is characterized in that: the inboard of sealing ring (9) is provided with lip limit (13).