CN202993549U

CN202993549U - Water heater

Info

Publication number: CN202993549U
Application number: CN 201220404192
Authority: CN
Inventors: 安荣栓; 刘鹏; 于向雷
Original assignee: BSH Electrical Appliances Jiangsu Co Ltd
Current assignee: BSH Electrical Appliances Jiangsu Co Ltd
Priority date: 2012-08-11
Filing date: 2012-08-11
Publication date: 2013-06-12
Anticipated expiration: 2022-08-11

Abstract

The utility model discloses a water heater. The water heater comprises a liner, a water inlet, a water outlet, a heat source, a shell and a heat insulation layer formed between the liner and the shell. Besides, the water heater further comprises an anode protective device. The anode protective device penetrates through an opening hole formed in the liner and is provided with a corrodible zone which is inserted into the liner. Insulating parts are arranged in the opening hole between the liner and the corrodible zone and further arranged on the outer surface of the corrodible zone in a surrounding mode. Besides, the insulating parts are higher than preset distance of the inner surface of the liner, so that even metal debris dropped from an anode bar due to corrosion of the anode bar accumulate around the anode bar of the inner surface of the liner to a certain degree, the phenomenon that the anode bar is electrically conducted with the liner by using the metal debris as a conductor does not occur, and therefore normal operation of an anode bar loss detecting circuit is ensured, and misinformation condition can not occur.

Description

Water heater

Technical field

The utility model relates to a kind of water heater, relates in particular to a kind of erosion protection system of water heater.

Background technology

The erosion protection system of water heater is generally used for preventing the surperficial corrosion of inner bag of water heater.This erosion protection system comprises that one dangles at the anode stub of water heater liner inside, and it has generally included metal medium, as magnesium, aluminium, zinc or alloy etc.Because these metal mediums have more active metallic character, thus can be prior to inner bag and be combined and react with the oxonium ion of water the inside, thus guarantee that by the sacrificial anode rod body inner bag surface is not corroded.After the metal medium of anode stub has been consumed, need to be replaced to guarantee that erosion protection system can continue to play a role, so these anode stubs normally are removably disposed on water heater.

As the disclosed erosion protection system of U.S. utility new patent application US2007272544; the one end extends in inner bag in use; the other end protrudes out outside inner bag; this erosion protection system comprises anode stub, be used for that anode stub is installed on the installation component on protected equipment and be compassingly set at insulating part on this anode stub distal outer surface; this insulating part be used for making anode stub and protected equipment insulated from each other, for example insulating part make anode stub and water heater liner insulated from each other.In the water heater with anode stub consumption measuring ability, conduct by on-off circuit between anode stub and water heater, and also be parallel with the testing circuit for detection of the anode stub Expenditure Levels between the two.In testing circuit work, on-off circuit must disconnect conducting.Along with the corrosion consumption at the use procedure Anodic rod of water heater, some metal fragments that fall down from anode stub because of corrosion can be deposited in around anode stub on the inner bag inner surface, perhaps some conduction incrustation scales also may deposit buildup around anode stub, will make anode stub and inner bag conduct when reaching certain accumulation degree, when so testing circuit is worked, anode stub and inner bag just can't disconnect conducting by on-off circuit, thereby affected the testing result of testing circuit, the wrong report anode stub runs out of, and causes the user to carry out mistake and changes anode stub.

In view of this, be necessary the erosion protection system of existing water heater is improved, with the generation of false alarm reduction situation.

The utility model content

The purpose of this utility model is to provide a kind of water heater, and it has improved erosion protection system, can effectively avoid reporting by mistake the situation that anode stub is exhausted.

To achieve these goals, the water heater of a kind of embodiment of the present utility model, it comprises

Inner bag is used for accommodating a certain amount of heated liquid;

Water inlet and delivery port, and described inner bag is communicated with to transmit the liquid that flows into inner bag and flow out inner bag;

Thermal source, related with described inner bag with the liquid in heating inner liner;

Shell is coated on outside described inner bag and is formed with thermal insulation layer between the two;

Anode protection device, it passes the perforate that is arranged on described inner bag, and this anode protection device has the corrodible section that stretches into inner bag;

Insulating part is arranged in the described perforate between described inner bag and described corrodible section, and this insulating part also arranges around described corrodible section outer surface; Described insulating part exceeds described inner bag inner surface preset distance in addition.

As further improvement of the utility model, described insulating part is cannula-like, is set on described corrodible section outer surface.

As further improvement of the utility model, described insulating part is made by insulating materials such as rubber or nylon.

As further improvement of the utility model, described preset distance is apart from the inner bag inner surface more than 3 millimeters.

As further improvement of the utility model, described anode protection device also has the head section that is positioned at outside inner bag, and this head section comprises nut and spiral shell head; Described nut is used for described spiral shell head is fixed in described corrodible section; Described spiral shell head is used for described anode protection device is fixed in described inner bag.

As further improvement of the utility model, described insulating part also is arranged between described spiral shell head and described corrodible section.

As further improvement of the utility model, described inner bag has one vertically to be held and a cross side, and wherein said thermal source is arranged on described vertical end, and described anode protection device is arranged on described cross side.

Compared with prior art, the beneficial effects of the utility model are: because insulating part exceeds the certain height of inner bag inner surface, even acquired a certain degree around being piled up in anode stub on the inner bag inner surface so anode stub erodes the metal fragment that gets off, it is conductor and conducting with inner bag by metal fragment that anode stub can not occur yet, thereby guaranteed the normal operation of anode stub loss testing circuit, the situation that can not occur reporting by mistake.

Description of drawings

Fig. 1 is the plan cross-section schematic diagram of a kind of embodiment of the utility model water heater;

Fig. 2 is the enlarged diagram of the erosion protection system of water heater shown in Figure 1;

Fig. 3 is the explosive view of this erosion protection system.

The specific embodiment

Shown in Figure 1 is a specific embodiment of the utility model water heater.In the present embodiment, electric heater 100 is pressure-bearing type, it comprise for storage be heated liquid metal inner tube 1, be coated on the outer metal shell 2 of inner bag 1, the filling that is formed on 2 of metal inner tube 1 and the metal shells thermal insulation layer 3 of foamed material again.Inner bag 1 comprises a pair of vertical end 15 (only indicating one of them) and a cross side 16 that is oppositely arranged.In the present embodiment, because inner bag 1 roughly is cylindric, so cross side 16 is cylindrical sidewall.Wherein vertical 15 places of holding at inner bag 1 are provided with thermal source, in the present embodiment for extending into the electric heating tube 4 of inner bag 1 inside.Certainly, also can adopt the heat source configurations of gas heater, namely by the combustion chamber that is arranged on outside inner bag 1, the liquid in inner bag 1 be heated.One water inlet 11 and a delivery port 12 are communicated with to transmit the cold water that flows into inner bag 1 and the hot water that flows out inner bag 1 with inner bag 1 respectively.One perforate 13 is arranged in inner bag 1 wall of the cross side 16 that inner bag 1 is set.

Cooperation is with reference to Fig. 2 and shown in Figure 3, and water heater 100 also comprises an anode protection device 5, and it comprises corrodible section and a head section 52.Anode protection device 5 extend in inner bag 1 by perforate 13.Corrodible section is the anode stub 51 in present embodiment namely, and it comprises the metal medium with more active metallic character, is magnesium in the present embodiment.Because the metallic character of magnesium is more active than the metal material (as steel or iron) of inner bag 1 housing, thus can be prior to inner bag 1 and be combined and react with the oxonium ion of water the inside, thus guarantee that by sacrificial anode rod 51 bodies inner bag 1 surface is not corroded.What those skilled in the art can expect easily certainly is that anode stub 51 also can comprise other active metal media, as aluminium, zinc or its alloy etc.Be provided with insulating part 6 in perforate 13 between inner bag 1 and anode stub 51, be used for making anode stub 51 and inner bag 1 to be electrically insulated from each other.This insulating part 6 is around the outer surface setting of anode stub 51 1 ends, and insulating part 6 exceeds the certain distance height of inner bag 1 inner surface, this apart from height more than 3 millimeters, such as being 1.5 centimetres.Along with the corrosion consumption at the use procedure Anodic rod 51 of water heater, some metal fragments that fall down from anode stub 51 because of corrosion can be deposited in around anode stub 51 on inner bag 1 inner surface, perhaps some conduction incrustation scales also may deposit buildup around anode stub 51.Because insulating part 6 exceeds inner bag 1 inner surface certain altitude around anode stub 51, so also be not easy to make anode stub and inner bag to conduct even metal fragment or conduction build-up of limescale acquire a certain degree, anode stub 51 and inner bag 1 are in electric insulating state all the time.Insulating part 6 preferably is cannula-like, and on the outer surface of direct sheathed anode stub 51 1 ends.Insulating part 6 preferably is made by insulating materials such as rubber or nylon.

Head section 52 is generally not corrodible part, in the present embodiment, comprise be hexagonal nut 521 and be located at nut 521 and anode stub 51 between spiral shell head 522.Simultaneously, separate by insulating part 6 between spiral shell head 522 and anode stub 51, make between spiral shell head 522 and anode stub 51 to be electrically insulated from each other.One sleeve pipe 14 is arranged on around perforate 13 on the outer wall of cross side 16 of inner bag 1, and it can be fixedly connected with inner bag 1 by modes such as welding.Certainly those skilled in the art can recognize easily, also sleeve pipe 14 can be arranged on vertical end 15 of inner bag 1.When assembling anode protective device 5, by nut 521, spiral shell head 522 is lock onto on anode stub 51.Be provided with nylon spacer 7 between nut 521 and spiral shell head 522, make nut 521 and spiral shell head 522 be electrically insulated from each other.This nylon spacer 7 also extends axially between spiral shell head 522 and anode stub 51 simultaneously, also makes spiral shell head 522 and anode stub 51 be electrically insulated from each other.Be formed with internal thread on the inwall of sleeve pipe 14, the extensible sleeve pipe 14 that passes of anode protection device 5, and by perforate 13, making its corrodible section is that anode stub 51 is placed in inner bag 1 to give birth to reaction with steeping in water for reconstitution, and its head section 52 is stayed outside inner bag 1.The operator can make the external screw thread of the spiral shell head 522 of head section 52 coordinate with the female thread portion of sleeve pipe 14 by operating nut part 521, thereby anode protection device 5 is arranged on inner bag 1 reliably.

The anode protection device that is clavate has mainly been described in above-mentioned embodiment; certainly; what those skilled in the art can expect easily is that this anode protection device also can adopt other configurations, as adopts spiral-shapedly, and the anode protection device with respect to clavate just can comprise more reactive metal like this.

Claims

1. water heater comprises:

Inner bag (1) is used for accommodating a certain amount of heated liquid;

Water inlet (11) and delivery port (12), and described inner bag (1) is communicated with the liquid that flows into inner bag (1) and flow out inner bag (1) to transmit;

Thermal source, related with described inner bag (1) with the liquid in heating inner liner (1);

Shell (2) is coated on outside described inner bag (1) and is formed with thermal insulation layer (3) between the two;

Anode protection device (5), it passes the perforate (13) that is arranged on described inner bag (1), and this anode protection device (5) has the corrodible section that stretches in inner bag (1);

Insulating part (6) is arranged in the described perforate (13) between described inner bag (1) and described corrodible section, and this insulating part (6) also arranges around described corrodible section outer surface;

It is characterized in that, described insulating part (6) exceeds described inner bag (1) inner surface preset distance.

2. water heater as claimed in claim 1, is characterized in that, described insulating part (6) is cannula-like, is set on described corrodible section outer surface.

3. water heater as claimed in claim 1, is characterized in that, described insulating part (6) is made by insulating materials such as rubber or nylon.

4. water heater as claimed in claim 1, is characterized in that, described preset distance is apart from inner bag (1) inner surface more than 3 millimeters.

5. water heater as claimed in claim 1, it is characterized in that, described anode protection device (5) also has the head section (52) that is positioned at outside inner bag (1), and this head section (52) comprises nut (521) and spiral shell head (522); Described nut (521) is used for described spiral shell head (522) is fixed in described corrodible section; Described spiral shell head (522) is used for described anode protection device (5) is fixed in described inner bag (1).

6. water heater as claimed in claim 5, is characterized in that, described insulating part (6) also is arranged between described spiral shell head (522) and described corrodible section.

7. water heater as claimed in claim 1; it is characterized in that; described inner bag (1) has one and vertically holds (15) and a cross side (16); wherein said thermal source is arranged on described vertical end (15), and described anode protection device (5) is arranged on described cross side (16).