CN204880663U - Double insulation electric water heater - Google Patents

Abstract

The utility model relates to an electric water heater structure, especially a double insulation electric water heater belong to electric water heater's technical field. According to the utility model provides a technical scheme, double insulation electric water heater includes the water storage inner bag and is located electrothermal tube in the water storage inner bag, the electrothermal tube includes the heat conduction outer tube and is located heat conduction inner tube in the heat conduction outer tube, be equipped with the heating wire in the portion of generating heat of electrothermal tube, it is intraductal that the heating wire lies in heat conduction, and the intraductal magnesia that is full of in the heat conduction, intermural the packings thermal insulation body in the outer wall of heat conduction inner tube and heat conduction outer tube, the both ends of heating wire are connected with the outer connecting wire electricity of water storage inner bag respectively. The utility model discloses compact structure can improve electric water heater's insulating ability, and adaptability is good, easy volume production, safe and reliable.

Description

Double-insulated electric water device

Technical field

The utility model relates to a kind of electric heater structure, and especially a kind of Double-insulated electric water device, belongs to the technical field of electric heater.

Background technology

Storage-type electric water heater adopts electric energy heating water, compares solar water heater, gas heater, affects little by environment for use, easy to use, significantly improves people's quality of the life.

There is electric leakage in use and to hurt sb.'s feelings risk in electric energy, electric heater generally uses the additional earth leakage protective measure of the electrothermal tube of single layer dielectrics structure, to prevent electrothermal tube outer damaged or dielectric to be deteriorated the electric leakage accident caused, though this mode can avoid accident not make improvement in the root of electric leakage generation; And this safeguard measure electric heater must adopt the earthing of casing; namely electric leakage can be introduced the earth when electric leakage occurs to avoid hurting people; which requires that the ground wire of installation environment circuit must be safe and reliable; if ground wire is unreliable; an electrical leakage; the all electric appliance casings of family are all by charged, and the risk of hurting sb.'s feelings is higher.In reality, ground wire is not laid by a lot of family for various reasons, therefore can not use common electric heater; In addition, even have and there is domestic power circuit and do not have ground wire, still in the situation using electric heater, electric heater casualty accident happens occasionally.

Summary of the invention

The purpose of this utility model overcomes the deficiencies in the prior art, and provide a kind of pair to rush insulated electro water heater, its compact conformation, can improve the insulating capacity of electric heater, adaptability is good, is easy to volume production, safe and reliable.

According to the technical scheme that the utility model provides, described Double-insulated electric water device, comprises water storage liner and is positioned at the electrothermal tube of described water storage liner; Described electrothermal tube comprises heat conduction outer tube and is positioned at the heat conduction pipe of described heat conduction outer tube; Heating wire is provided with in the heating part of electrothermal tube, described heating wire is positioned at heat conduction pipe, and magnesia powder is full of in pipe in described heat conduction, in heat conduction, fill thermal conductive insulator between the outer wall of pipe and the inwall of heat conduction outer tube, the two ends of heating wire are electrically connected with the connection wire outside water storage liner respectively.

Described heating wire manage in heat conduction in U-shaped distribution, and heating wire is in the shape of a spiral.

Outside described water storage liner, be provided with ring flange, seal welding between the end of heat conduction outer tube and ring flange, thermal conductive insulator comprises magnesia powder or pottery.

The cross section of described heat conduction outer tube is ellipticity or circular.

In water storage liner, be provided with the metal temperature-sensing pipe for thermometric, an end of described metal temperature-sensing pipe is welded with flangeseal, and metal temperature-sensing pipe and electrothermal tube are positioned at the homonymy of ring flange.

Described ring flange is locked on inner bag flange by clamping screw sealing, and described inner bag flange is positioned at the end outside water storage liner.

Described connection wire is electrically connected with temperature controller or thermal cutter.

Advantage of the present utility model: U-shaped and spiral helicine heating wire is set in the heating part of electrothermal tube, double insulation is carried out by magnesia powder and thermal conductive insulator, and it is separate between magnesia powder and thermal conductive insulator, the insulating capacity of effective raising electric heater, without the need to changing the syndeton of existing water storage liner, structure is simple, stable performance, be easy to volume production, safe and reliable.

Accompanying drawing explanation

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

Fig. 2 is the utility model ring flange and coordinate schematic diagram between heat-generating pipe.

Fig. 3 is the sectional view of the utility model electrothermal tube.

Description of reference numerals: in 1-water storage liner, 2-electrothermal tube, 3-heating wire, 4-heat conduction, pipe, 5-magnesia powder, 6-heat conduction outer tube, 7-thermal conductive insulator, 8-ring flange, 9-metal temperature-sensing pipe, 10-clamping screw, 11-inner bag flange, 12-connection wire, 13-heating part, 14-connect guide pillar, 15-first sealing-plug and 16-second sealing-plug.

Detailed description of the invention

Below in conjunction with concrete drawings and Examples, the utility model is described in further detail.

As depicted in figs. 1 and 2: in order to improve the insulating capacity of electric heater, adaptability is good, is easy to volume production, the utility model comprises water storage liner 1 and is positioned at the electrothermal tube 2 of described water storage liner 1; Described electrothermal tube 2 comprises heat conduction outer tube 6 and is positioned at the heat conduction pipe 4 of described heat conduction outer tube 6; Heating wire 3 is provided with in the heating part 13 of electrothermal tube 2, described heating wire 3 is positioned at heat conduction pipe 4, and magnesia powder 5 is full of in pipe 4 in described heat conduction, in heat conduction, fill thermal conductive insulator 7 between the outer wall of pipe 4 and the inwall of heat conduction outer tube 6, the two ends of heating wire 3 are electrically connected with the connection wire 12 outside water storage liner 1 respectively by two connection guide pillars 14.

Particularly, the water storage of electric heater can be realized by water storage liner 1, water in water storage liner 1 can be heated by electrothermal tube 2, namely heated by the heating wire 3 in pipe in heat conduction 4, heat is produced after heating wire 3 is energized, carry out heat conduction by pipe in heat conduction 4, magnesia powder 5, heat conduction outer tube 6 and thermal conductive insulator 7, heat can be delivered to the water in water storage liner 1.Heating wire 3 is distributed in the heating part 13 of electrothermal tube 2, and the heating part 13 of electrothermal tube 2 is generally the region away from water storage liner 1 head end.In heat conduction, pipe 4 can adopt the non-metallic conduit of metal catheter or energy heat conduction, and heat conduction outer tube 6 generally can adopt metal catheter, can realize dual heating insulating effect by magnesia powder 5, thermal conductive insulator 7, improves the insulating capacity of electric heater.Connecting wire 12 is positioned at outside water storage liner 1, there are outside water storage liner 1 two and connect wire 12, two connect same one end that wire 12 is positioned at water storage liner 1, are namely all positioned at outside the head end of water storage liner 1, connect wire 12 be electrically connected with the two ends of heating wire 3 respectively by two.

As shown in Figure 3, described heating wire 3 is U-shaped distribution in pipe 4 in heat conduction, and heating wire 3 in the shape of a spiral.In the utility model embodiment, heating wire 3 adopts resistance wire to make, heating wire 3 is U-shaped distribution in pipe 4 in heat conduction, namely the both ends of heating wire 3 are all positioned at same one end, heating wire 3 by bonding conductor 14 be connected wire 12 and connect, usually, bonding conductor 14 is positioned at the non-heating part 13 of electrothermal tube 2, and the calorific capacity of bonding conductor 14 is much smaller than heating wire 3.Heating wire 3 in the shape of a spiral, refer to that part between resistance wire two ends in the shape of a spiral, spiral helicine heating wire 3 can increase heating length further, by heating wire 3 is arranged U-shaped and helical form, heating length can be increased, improve the efficiency of heating surface, and then effectively can improve the water storage heating efficiency of water storage liner 1.

Heating wire 3 is by keeping fixing in pipe in the inherent heat conduction of magnesia powder 54, in heat conduction, pipe 4 is for closing one end, in heat conduction, the other end of pipe 4 is sealed by the first sealing-plug 15, bonding conductor 14, through the first sealing-plug 15, can avoid magnesia powder 5 to drop out in pipe in heat conduction 4 by the first sealing-plug 15.Meanwhile, second sealing-plug 16 is set in the end of heat conduction outer tube 6, thermal conductive insulator 7 can be made to remain in heat conduction outer tube 6 by the second sealing-plug 16, the space in thermal conductive insulator 7 falling heat-transfer outer tube 6 inwall and heat conduction between pipe 4 inwall, effectively can carry out insulating heat-conductive.

Outside described water storage liner 1, be provided with ring flange 8, seal welding between the end of heat conduction outer tube 6 and ring flange 8, thermal conductive insulator 7 comprises magnesia powder or pottery.In the utility model embodiment, ring flange 8 is positioned at outside the head end of water storage liner 1, and heat conduction outer tube 6 correspondence arranges end and ring flange 8 seal welding of the second sealing-plug 16, and electrothermal tube 2 correspondence forms heating part 13 away from one end of ring flange 8.In the specific implementation, thermal conductive insulator 7 can adopt magnesia powder, pottery or other can carry out the material of heat conductive insulating, specifically can select as required, repeat no more herein.The cross section of described heat conduction outer tube 6 is ellipticity or circular, when the cross section of heat conduction outer tube 6 is circular, electrothermal tube 2 is in cylindric, the cross section of heat conduction outer tube 6 also can ovalize or other shapes, when heat conduction outer tube 6 adopts ellipse, the area in water storage liner 1 can be improved, when heat conduction outer tube 6 adopts ellipse or other shapes, in heat conduction, the shape of pipe 4 can adopt adaptive shape, specifically repeats no more.

In water storage liner 1, be provided with the metal temperature-sensing pipe 9 for thermometric, an end of described metal temperature-sensing pipe 9 and ring flange 8 seal welding, metal temperature-sensing pipe 9 and electrothermal tube 2 are positioned at the homonymy of ring flange 8.Usually, electrothermal tube 2 can be 77 ° with the angle of ring flange 8, metal temperature-sensing pipe 9 can carry out thermometric to the temperature of hot water in water storage liner 1, it can be parallel distribution between metal temperature-sensing pipe 9 with electrothermal tube 2, metal temperature-sensing pipe 9 can the side of electrothermal tube 2 or above, the temperature measurement structure that metal temperature-sensing pipe 9 can adopt the art conventional, specifically repeats no more.

Described ring flange 8 is locked on inner bag flange 11 by clamping screw 10 sealing, and described inner bag flange 11 is positioned at the end outside water storage liner 1.Inner bag flange 11 is fixed on outside the head end of water storage liner 1, ring flange 8 is locked on inner bag flange 11 by clamping screw 10 sealing, connect wire 12 through ring flange 8, described connection wire 12 is electrically connected with temperature controller or thermal cutter, and temperature controller or thermal cutter can cut off the duty of heating wire 3 by connecting wire 12.

In the heating part 13 of the utility model electrothermal tube 2, U-shaped and spiral helicine heating wire 3 is set, double insulation is carried out by magnesia powder 5 and thermal conductive insulator 7, and it is separate between magnesia powder 5 and thermal conductive insulator 7, the insulating capacity of effective raising electric heater, without the need to changing the syndeton of existing water storage liner 1, structure is simple, stable performance, be easy to volume production, safe and reliable.

Claims (7)

1. a Double-insulated electric water device, comprises water storage liner (1) and is positioned at the electrothermal tube (2) of described water storage liner (1); It is characterized in that: described electrothermal tube (2) comprises heat conduction outer tube (6) and is positioned at heat conduction pipe (4) of described heat conduction outer tube (6); Heating wire (3) is provided with in the heating part (13) of electrothermal tube (2), described heating wire (3) is positioned at heat conduction pipe (4), and magnesia powder (5) is full of in pipe (4) in described heat conduction, manage in heat conduction between the outer wall of (4) and the inwall of heat conduction outer tube (6) and fill thermal conductive insulator (7), the two ends of heating wire (3) are electrically connected with water storage liner (1) connection wire (12) outward respectively.

2. Double-insulated electric water device according to claim 1, is characterized in that: described heating wire (3) manages U-shaped distribution in (4) in heat conduction, and heating wire (3) in the shape of a spiral.

3. Double-insulated electric water device according to claim 1, it is characterized in that: outside described water storage liner (1), be provided with ring flange (8), seal welding between the end of heat conduction outer tube (6) and ring flange (8), thermal conductive insulator (7) comprises magnesia powder or pottery.

4. Double-insulated electric water device according to claim 3, is characterized in that: the cross section of described heat conduction outer tube (6) is ellipticity or circular.

5. Double-insulated electric water device according to claim 3, it is characterized in that: in water storage liner (1), be provided with the metal temperature-sensing pipe (9) for thermometric, one end of described metal temperature-sensing pipe (9) and ring flange (8) seal welding, metal temperature-sensing pipe (9) and electrothermal tube (2) are positioned at the homonymy of ring flange (8).

6. Double-insulated electric water device according to claim 3, is characterized in that: described ring flange (8) is locked on inner bag flange (11) by clamping screw (10) sealing, and described inner bag flange (11) is positioned at water storage liner (1) end outward.

7. Double-insulated electric water device according to claim 1, is characterized in that: described connection wire (12) is electrically connected with temperature controller or thermal cutter.