CN2769758Y - Positive displacement electric water heater - Google Patents
Positive displacement electric water heater Download PDFInfo
- Publication number
- CN2769758Y CN2769758Y CN 200520055114 CN200520055114U CN2769758Y CN 2769758 Y CN2769758 Y CN 2769758Y CN 200520055114 CN200520055114 CN 200520055114 CN 200520055114 U CN200520055114 U CN 200520055114U CN 2769758 Y CN2769758 Y CN 2769758Y
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- China
- Prior art keywords
- water
- inner bag
- electric heater
- inner liner
- heat exchanger
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- Expired - Fee Related
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- Heat-Pump Type And Storage Water Heaters (AREA)
- Instantaneous Water Boilers, Portable Hot-Water Supply Apparatuses, And Control Of Portable Hot-Water Supply Apparatuses (AREA)
Abstract
The utility model relates to a volume-type electric water heater, which comprises an outer shell and an inner liner, wherein an electric heating element and a heat exchanging pipe are arranged in the inner liner; a water replenishing pipe arranged on the heat exchange pipe is communicated with the inner liner; an electromagnetic valve is arranged on the water replenishing pipe; a water level inductor is arranged in the inner liner; the electromagnetic valve and the water level inductor are respectively and electrically connected with a controller; a pressure relief valve is arranged on the inner liner; a heat insulating layer is arranged between the outer shell and the inner liner; the top part of the inner liner is provided with an air exhaust valve. The utility model adopts a using water indirect heating mode, i.e. the electric heating element only heats the water in the inner liner, and the water in the inner liner becomes a heat carrier between the electric heating element and the heat exchanging pipe; the heat carrier transfers the heat to a heat exchanger in the inner liner; the inner liner is basically not mixed with the water in the heat exchanger except replenishing a small amount of lost water. The utility model has the advantages of simple and reasonable structure and low cost; the utility model effectively solves the problems of damage of the volume-type electric water heater because of corrosion of the inner liner and a fouling surface of the electric heating element.
Description
Technical field
The utility model relates to a kind of electric heater, particularly a kind of positive displacement electric heater.
Background technology
Common positive displacement electric heater is mainly by shell, inner bag, water inlet pipe and water outlet pipe, heat control valve, electrical heating element, formations such as magnesium rod, temperature element and temperature controller, adopt directly of its mode of heating heated more, cold water promptly direct by electrical heating element and in the inner bag contacts, and then the water in the inner bag is heated.When using electric heater, cold water enters inner bag by water inlet pipe, mixes with hot water in the inner bag, and meanwhile, mixed hot water is discharged by outlet pipe in the inner bag, mixes with cold water by heat control valve again, offers user's use then.The temperature element in this kind electric heater and the major function of thermostat are: the hot water temperature in the control inner bag, can also play a part to regulate and displays temperature in case of necessity; The major function of magnesium rod is: prevent electrochemical corrosion, the protection inner bag.This electric heater major defect is: in heating process, calcium ions and magnesium ions in the cold water is constantly formed incrustation scale, concentrates at the electrical heating element surface, and then reduces the heat transfer efficiency of heating, shorten the service life of heating, cause electrical heating element to damage the most at last.In order to protect electrical heating element, general common way is: the maximum heating temperature of hot water in the restriction inner bag, also just directly reduced the capacity utilization of inner container of electric water heater.In addition, dissolved gases can discharge in heating process gradually in the water, can corrode inner bag gradually in its dispose procedure, directly causes inner bag to leak.
At above-mentioned this situation, some producer has done some improvement to this, as disclosing a kind of oil bath indirect electric heater among the Chinese patent ZL00243018.5.This electric heater is that a tank body is set in the courage body of electric heater, electric heating tube is set in the tank body, be provided with sealing ring between outer flanging of electric heater end socket and the outer flanging of tank body port and realize oil sealing, be provided with sealing ring between outer flanging of tank body and the outer flanging of tank body and realize water seal, the inboard on end socket is provided with blind pipe and the displacement touch switch bar of placing thermometric spare.The electric heater of this kind structure though adopted the mode of indirect, has been avoided the heating surface scale, bulky, the seal structure complex of this electric heater, and cost is also high.
The utility model content
The purpose of this utility model is to provide a kind of simple and reasonable, volume is little, cost is low, heat exchanger effectiveness is high, safe and reliable positive displacement electric heater, to overcome weak point of the prior art.
A kind of positive displacement electric heater by this purpose design, comprise shell and inner bag, be provided with electrical heating element in the inner bag, its architectural feature is to be provided with heat exchanger in the inner bag, heat exchanger is connected with inlet tube and outlet tube with health respectively, and heat exchanger or water inlet pipe or outlet pipe are provided with filling pipe and are connected with inner bag.
This positive displacement electric heater has two kinds of inner-tube structures, is respectively non-pressure-bearing inner bag and pressure-bearing inner bag.
The heat exchanger of the positive displacement electric heater of pressure-bearing inner-tube structure is provided with filling pipe and is connected with inner bag, and inner bag or outlet pipe are provided with pressure-relief valve.Filling pipe wherein both can directly communicate with inner bag, also can between filling pipe and inner bag check valve be set.
The heat exchanger of the positive displacement electric heater of non-pressure-bearing inner-tube structure is provided with filling pipe and is connected with inner bag, filling pipe is provided with normally closed solenoid valve, be provided with water level sensor in the inner bag, magnetic valve and water level sensor are electrically connected with controller respectively, and inner bag or outlet pipe are provided with pressure-relief valve.
Above-mentioned heat exchanger comprises the heat exchanger tube and the plate type heat exchanger of coiling.The heat exchanger tube two ends are connected with water inlet pipe, outlet pipe with health successively, and water inlet pipe and outlet pipe junction are provided with heat control valve and hot-water line.Be provided with thermal insulation layer between shell and the inner bag.The inner bag top is provided with air bleeding valve.Also be provided with the controller that shows and control the electric heater duty on the electric heater.
The utility model is taked making the mode of water indirect, and promptly electrical heating element only heats the water in the inner bag, and the water in the inner bag becomes the heat carrier between electrical heating elements and the heat exchanger tube, and it is delivered to heat in the heat exchanger tube that is coiled in the inner bag; Inner bag does not mix with water in the heat exchanger except the water that replenishes small loss basically.
After the water in the inner bag is being heated for the first time, after assembling, a small amount of incrustation scale can accumulate in the electrical heating element outer surface, and water left in the inner bag becomes soft water basically; Because the water quality of heat-conductive water is constant substantially in the inner bag, thereby avoided traditional electrical water heater hot water continuous because of extraneous cold water and in the inner bag to mix, constantly there is incrustation scale to concentrate at the electrical heating element outer surface, causes the electrical heating element heat transfer efficiency to reduce, even damage electrical heating element.
The heat exchanger tube of the pressure-bearing inner bag in the utility model is provided with filling pipe and directly is communicated with inner bag, and when the water in the inner bag reduced, water entered inner bag by filling pipe automatically.
The heat exchanger tube of the non-pressure-bearing inner bag in the utility model is provided with filling pipe and directly is communicated with inner bag, and filling pipe is provided with normally closed solenoid valve, is provided with water level sensor in the corresponding inner bag.When the water yield in the inner bag was not enough, water level sensor provided a signal to controller, and controller provides an instruction allows electrical heating element quit work, and meanwhile, normally closed water solenoid valve is opened, and adds water to inner bag.When moisturizing finishes, water level sensor provides signal, and normally closed water solenoid valve is closed.
When using electric heater, open water intaking valve earlier, close outlet valve, connect power supply, give the inner bag water-filling, running water enters inner bag inside by water inlet pipe, filling pipe, meanwhile, air in the inner bag is discharged by air bleeding valve, finishes up to the inner bag water-filling, and electrical heating element is not had by water logging fully; Electric heater begins heating, and electrical heating element is heated to design temperature with water in the inner bag, and controller control electrical heating element quits work.When the user uses, open water intaking valve and outlet valve, running water enters heat exchanger tube by water inlet pipe, and by heat exchange, the water in the heat exchanger tube is heated, and discharges by outlet pipe, uses for the user.
The utility model adopts the heat exchanger tube that coiling is set in inner bag, allow the water that enters in the heat exchanger tube fully be heated, and has improved the effect of heat exchange.
The utility model is provided with check valve between the filling pipe of the positive displacement electric heater of pressure-bearing inner-tube structure and inner bag, prevent that the water in the inner bag is back in the heat exchanger, to keep making the water sanitation and hygiene.
The utility model is simple and reasonable, volume is little, cost is low, heat exchanger effectiveness is high, safe and reliable, and effectively solved displacement type water heater inner bag burn into electrical heating element and caused the problem damaged because of surface scale.
Description of drawings
Fig. 1 is the utility model one example structure schematic diagram.
Fig. 2 is another example structure schematic diagram of the utility model.
The specific embodiment
Below in conjunction with drawings and Examples the utility model is further described.
Referring to Fig. 1, this positive displacement electric heater is provided with thermal insulation layer 13 between shell 14 and the inner bag 11, and inner bag 11 is provided with pressure-relief valve 16.Be provided with the heat exchanger tube 10 of electrical heating element 9 and coiling in the inner bag 11, heat exchanger tube 10 is provided with the filling pipe 1 that is connected with inner bag 11, also be provided with the controller 7 that shows and control the electric heater duty on the electric heater, heat exchanger tube 10 two ends are connected with water inlet pipe 2, outlet pipe 5 with health successively, water inlet pipe 2 and outlet pipe 5 junctions are provided with heat control valve 4 and hot-water line 3, inner bag 11 tops are provided with air bleeding valve 12, see Fig. 1.The also available plate type heat exchanger of this heat exchanger tube 10 substitutes, and its effect is constant.In order to prevent in the use that the water in the inner bag 11 flows in the heat exchanger tube 10, check valve 22 can be set on filling pipe 1.6 is power line among the figure, and 8 is temperature controller.
Referring to Fig. 2, heat exchanger tube 10 is provided with the filling pipe 21 that is connected with inner bag 11, and filling pipe 21 is provided with magnetic valve 15, is provided with water level sensor in the inner bag 11, and outlet pipe 5 is provided with pressure-relief valve 17.Magnetic valve 15, water level sensor are electrically connected with controller 7 respectively, and water level sensor does not draw in the drawings.Remainder is same as above.
Claims (10)
1. positive displacement electric heater, comprise shell (14) and inner bag (11), be provided with electrical heating element (9) in the inner bag, it is characterized in that being provided with heat exchanger in the described inner bag, heat exchanger is connected with inlet tube and outlet tube with health respectively, and heat exchanger or water inlet pipe or outlet pipe are provided with filling pipe and are connected with inner bag.
2. positive displacement electric heater according to claim 1 is characterized in that described filling pipe (21) is provided with normally closed solenoid valve (15), and inner bag is provided with water level sensor in (11), and magnetic valve and water level sensor are electrically connected with controller (7) respectively.
3. positive displacement electric heater according to claim 1 is characterized in that filling pipe and the inner bag on described water inlet pipe or the outlet pipe is straight-through.
4. positive displacement electric heater according to claim 3 is characterized in that being provided with check valve between described filling pipe and the inner bag.
5. according to the arbitrary described positive displacement electric heater of claim 1 to 3, it is characterized in that described inner bag (11) or outlet pipe are provided with pressure-relief valve (16).
6. positive displacement electric heater according to claim 1 is characterized in that described heat exchanger comprises the heat exchanger tube (10) and the plate type heat exchanger of coiling.
7. positive displacement electric heater according to claim 1 is characterized in that described heat exchanger tube two ends are connected with water inlet pipe (2), outlet pipe (5) with health successively, and water inlet pipe and outlet pipe junction are provided with heat control valve (4) and hot-water line (3).
8. positive displacement electric heater according to claim 1 is characterized in that being provided with thermal insulation layer (13) between described shell (14) and the inner bag (11).
9. positive displacement electric heater according to claim 1 is characterized in that described inner bag (11) top is provided with air bleeding valve (12).
10. positive displacement electric heater according to claim 1 is characterized in that also being provided with on the described electric heater controller (7) that shows and control the electric heater duty.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520055114 CN2769758Y (en) | 2005-02-26 | 2005-02-26 | Positive displacement electric water heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520055114 CN2769758Y (en) | 2005-02-26 | 2005-02-26 | Positive displacement electric water heater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2769758Y true CN2769758Y (en) | 2006-04-05 |
Family
ID=36690838
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520055114 Expired - Fee Related CN2769758Y (en) | 2005-02-26 | 2005-02-26 | Positive displacement electric water heater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2769758Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102235752A (en) * | 2010-05-07 | 2011-11-09 | 爱烙达股份有限公司 | Heating device for water heater |
-
2005
- 2005-02-26 CN CN 200520055114 patent/CN2769758Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102235752A (en) * | 2010-05-07 | 2011-11-09 | 爱烙达股份有限公司 | Heating device for water heater |
| CN102235752B (en) * | 2010-05-07 | 2013-08-07 | 爱烙达股份有限公司 | Heating device for water heater |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |