CN201129846Y - Outer circulation high-efficiency and energy-saving gas positive displacement water heater - Google Patents
Outer circulation high-efficiency and energy-saving gas positive displacement water heater Download PDFInfo
- Publication number
- CN201129846Y CN201129846Y CNU2007201882052U CN200720188205U CN201129846Y CN 201129846 Y CN201129846 Y CN 201129846Y CN U2007201882052 U CNU2007201882052 U CN U2007201882052U CN 200720188205 U CN200720188205 U CN 200720188205U CN 201129846 Y CN201129846 Y CN 201129846Y
- Authority
- CN
- China
- Prior art keywords
- gas
- inner container
- water heater
- assembly
- heat exchanger
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Landscapes
- Instantaneous Water Boilers, Portable Hot-Water Supply Apparatuses, And Control Of Portable Hot-Water Supply Apparatuses (AREA)
Abstract
The utility model relates to an external-circulation high-efficiency energy-saving combustion gas volumetric type water heater, which comprises an outer barrel, an enamel inner container, a water heater insulating layer, an outer barrel lower end cover combination, a sewage outlet, a cold water inlet, a hot water outlet, a combustion gas inlet, a temperature pressure security valve interface, an outer barrel upper cover, an anode magnesium bar in the enamel inner container and a supporting ring, a combustion gas burning device is fixedly arranged in an outer casing cover on one side on the upper portion of the outer barrel, a heat exchanger is wrapped on the combustion gas burning device, the inlet end of the heat exchanger is provided with a circulating heating starting switch, the inlet end of the starting switch is connected with a heat circulating pump, the inlet end of the heat circulating pump is communicated with the enamel inner container, an over-temperature controller and a low-temperature controller are arranged on the heat exchanger, the outlet end of the heat exchanger is also provided with a temperature sensor, the outlet of the heat exchanger passes through the outer barrel and is communicated with the enamel inner container, an electrothermal tube is arranged in the lower portion of the enamel inner container, the outer surface of the enamel inner container is adhered with a thermoregulator/safeguard for ultra-temperature, the lower portion of the outer barrel is provided with an electric control assemblage, and the top portion of the combustion gas burning device is provided with a intensified firing draught fan assemblage.
Description
Technical field
The utility model relates to a kind of gas heater, particularly a kind of outer circulation efficient energy-saving gas displacement type water heater.
Background technology
Along with science and technology development, improving constantly of people's living standard, water heater, gas instantaneous water heater etc. are widely used in daily life, especially gas displacement type water heater is widely applied, it adopts the burning of combustion gas in use, offer the user after water in its enamel inner container heated, but the rated heat input, rated heat load of existing gas displacement type water heater is little, the thermal efficiency is low, the heat production outlet capacity is poor continuously, insulation is kept required hot water temperature and is loaded greatly, the condensed water phenomenon is serious, and the water temperature superposition phenomenon is difficult for overcoming.
Summary of the invention
The purpose of this utility model is to overcome the deficiency of existing gas displacement type water heater, a kind of outer circulation efficient energy-saving gas displacement type water heater is provided, it can increase the rated heat input, rated heat load of water heater, improve the thermal efficiency, increase the ability of continuous heat production water, reduce insulation and keep required hot water temperature's load, evaporated condensation water and water temperature superposition phenomenon.
The utility model has adopted following technical scheme: a kind of outer circulation efficient energy-saving gas displacement type water heater; include urceolus; enamel inner container; the water heater heat-insulation layer; the combination of urceolus bottom end cover; sewage draining exit; cold water inlet; hot water outlet; fuel gas inlet; the temperature, pressure relief valve connection; the urceolus loam cake; anodic magnesium rod in the enamel inner container and bracing ring; it is characterized in that being installed with gas combustion apparatus in the outer jacket of the side on urceolus top; be surrounded with heat exchanger on this gas combustion apparatus; the arrival end of heat exchanger is provided with circulation heating starting switch; the arrival end of this starting switch is connected with hot recycle pump; the arrival end and the enamel inner container of hot recycle pump lead to; heat exchanger is provided with overheat controller and cryostat; the port of export of heat exchanger also is provided with temperature sensor; urceolus is passed in the outlet of this heat exchanger and enamel inner container leads to; be provided with electrothermal tube in the bottom of enamel inner container; post temperature controller/overtemperature protection device on the enamel inner container outer surface; electric controlling assembly is arranged at the urceolus bottom, and the top of gas combustion apparatus is provided with forced burning blower fan assembly.
The outer circulation efficient energy-saving gas displacement type water heater that provides by the utility model, be provided with electrothermal tube owing to having in gas combustion apparatus and the bottom at enamel inner container at the urceolus peripheral hardware, and gas combustion apparatus separates with the enamel inner container of heat exchanger with storage hot water, and the hot water that stores in the enamel inner container is by hot recycle pump circulation heating.Combustion gas and electricity not only can heat simultaneously but also can separate independent heating, have kept the advantage of gas displacement type water heater and Power Capacity formula water heater; A large amount of required hot water can disposablely be provided, and the hot water of supplying simultaneously more than two uses point; Hot water constant temperature does not have sometimes hot and sometimes cold phenomenon.The utility model has overcome the deficiency of existing gas displacement type water heater, rated heat input, rated heat load increase be twice above, the thermal efficiency improves 10%, the heat production outlet capacity is enhanced about more than once continuously, the load that required hot water temperature is kept in insulation reduces one times, evaporated condensation water and water temperature superposition phenomenon have reduced use cost, have saved energy resource consumption.
Description of drawings
The utility model has following accompanying drawing:
Fig. 1 is a profile vertical view of the present utility model;
Fig. 2 is the A-A view of Fig. 1;
Fig. 3 is the B-B view of Fig. 1;
Fig. 4 electrical control figure of the present utility model.
The specific embodiment
Embodiment of the present utility model is described with reference to the accompanying drawings.As Fig. 1; Fig. 2; Fig. 3; shown in Figure 4; a kind of outer circulation efficient energy-saving gas displacement type water heater; include urceolus 23; enamel inner container 13; water heater heat-insulation layer 16; urceolus bottom end cover combination 19; sewage draining exit 20; cold water inlet 21; hot water outlet 30; fuel gas inlet 11; temperature, pressure relief valve connection 3; urceolus loam cake 32; anodic magnesium rod 17 in the enamel inner container 13 and bracing ring 18; be installed with gas combustion apparatus 7 in the jacket 8 outside one side on urceolus 23 tops; be surrounded with heat exchanger 6 on this gas combustion apparatus; the arrival end of heat exchanger 6 is provided with circulation heating starting switch 26; the arrival end of this starting switch 26 is connected with hot recycle pump 22; the arrival end of hot recycle pump 22 and enamel inner container 13 lead to; heat exchanger 6 is provided with overheat controller 4 and cryostat 5; the port of export of heat exchanger 6 also is provided with temperature sensor 10; the outlet of this heat exchanger 6 is passed urceolus 23 and is led to enamel inner container 13; be provided with electrothermal tube 15 in the bottom of enamel inner container 13; post temperature controller/overtemperature protection device 25 on enamel inner container 13 outer surfaces; electric controlling assembly 36 is arranged at the urceolus bottom, and the top of gas combustion apparatus 7 is provided with forced burning blower fan assembly.Heat exchanger adopts the high efficiency heat exchanger of the forced burning of gas instantaneous water heater, by the anaerobic copper material through the integral braze-welded burner top that is looped around gas combustion apparatus 7, it provides the gas secondary combustion space, and cold water is become hot water by heat exchanger, not only environmental protection but also energy-conservation.Temperature controller/overtemperature protection device 25 is the parts that adopt combustion gas and Power Capacity formula water heater, temperature controller and overtemperature protection device are designed to one, respond to water temperature by directly contacting, have advantages such as current loading is big, reliability is high, long service life with the enamel inner container outer surface; The adjustable range of temperature controller is 50-70 ℃, and factory setting is at 60 ℃; The setting value of overtemperature protection device is 90 ℃, and is unadjustable, and when water temperature reached 90 ℃ because of accident, overtemperature protection device was cut off the electricity supply immediately, and this device action can not automatically reset later, needs artificial forced resetting.Electrothermal tube 15 is the electrothermal tubes that adopt Power Capacity formula water heater, and its effect is that electric energy is converted into heat energy, and water is heated.50 ± 3 ℃ of cryostat 5 operating temperatures are used for water heater full load operation control, surpass 50 ℃ of controllers and disconnect, and water heater changes 50% rated load operation over to.65 ± 3 ℃ of overheat controller operating temperatures are used for the protection of heat exchanger, and when the hot water temperature of heating surpasses 65 ℃, overheat controller disconnects, and water heater stops heating, the service life of protection heat exchanger.The water in the enamel inner container 13 is flowed in acting as of hot recycle pump 24; by its startup gas combustion apparatus work of flowing; and make the heating of mobile water by heat exchanger 6; its startup and stop to control by the temperature that temperature controller/overtemperature protection device 25 is set; changed displacement type water heater water and be heated to be the heating of flowing, improved the thermal efficiency by static.During the acting as water and flow of circulation heating starting switch 26, the signal that water is flowed offers master controller, is worked by main controller controls water heater heating part again.
In the embodiment shown in the figures, gas combustion apparatus 7 adopts the burner with high efficiency assembly of the forced burning of gas instantaneous water heater, this device includes combustion gas control assembly 9, gas control valve assembly 27, burner, segmentation magnetic valve 28, exhaust fume collecting hood 29 and outer smokejack connector 33, the inlet end of gas control valve assembly 27 is connected with fuel gas inlet 11, the outlet side of gas control valve assembly 27 is connected with burner, the control input end of gas control valve assembly 27 is connected with the output of combustion gas control assembly 9, exhaust fume collecting hood 29 is fixedly arranged on the top of gas combustion apparatus 7, and the upper end of exhaust fume collecting hood 29 is provided with outer smokejack connector 33.The burner with high efficiency assembly of the forced burning of gas instantaneous water heater is the burner assembly of existing gas heater, the air that burner will be supplied with fuel gas buring is divided into primary air and auxiliary air, will mix in burner from the combustion gas of nozzle ejection and be incorporated in the combustion of burner fire stomion; Burner fire hole calorific intensity height is three times of nature induced air type burner; The material that burner adopts is the thick 1Cr18Ni9 of 0.3mm, long service life.The gas control valve assembly of the band combustion gas voltage stabilizing of the forced burning of gas control valve assembly 27 employing gas instantaneous water heaters, it is the parts that the major control combustion gas opens or closes in the blast tube, under the control of electric controlling assembly, water heater do not move or running in combustion gas appears under the fortuitous event cutting off automatically, guarantee safety, and the required gaseous-pressure of burner is not raise with the outer gaseous-pressure of water heater, make flameholding, safety, reliable.Forced burning blower fan assembly adopts the forced burning blower fan assembly of the forced burning of gas instantaneous water heater, it is made of blower fan 31, fan starting electric capacity 1, blast switch 2, fan starting electric capacity 1 is electrically connected with blower fan 31, blower fan 31 is arranged at outer smokejack connector 33 1 sides, and the input of blower fan 31 and blast switch 2 is connected with the output of combustion gas control assembly 9 respectively.Electric controlling assembly 36 includes A.C. contactor 24, electrical heating switch 34, combustion gas heater switch 35; the windings in series of electrical heating switch 34 and A.C. contactor 24; combustion gas heater switch 35 is connected with the power end of aforesaid hot recycle pump 22; the normally opened contact of A.C. contactor 24 is connected with aforesaid electrothermal tube 15; these three series circuits are connected with aforesaid temperature controller 25 outputs after being connected in parallel, and temperature controller/overtemperature protection device 25 inputs are connected with AC power through attaching plug 12.The power input of combustion gas control assembly 9 is connected with temperature controller/overtemperature protection device 25 outputs, and the control signal I/O end of combustion gas control assembly 9 is connected with the control signal output/input of aforesaid temperature sensor 10, cryostat 5, overheat controller 4, circulation heating starting switch 26, gas combustion apparatus 7, blast switch 2, blower fan 31, gas control valve assembly 27 and segmentation magnetic valve 28 respectively.Also be provided with electrothermal tube protecgulum 14 on the urceolus 23 outside the electrothermal tube 15.
When the utility model uses combustion gas and electrical heating simultaneously, open the electrical heating switch, actual water temperature is lower than temperature controller/overtemperature protection device design temperature, the A.C. contactor energising, its normally opened contact adhesive, the electrical heating indicator lamp is bright, and electric heating tube begins heating; Open the combustion gas heater switch, actual water temperature is lower than temperature controller/overtemperature protection device design temperature, the combustion gas burner on light is bright, and hot recycle pump starts, and the water that stores in the enamel inner container begins to flow, the signal that circulation heating starting switch flows water offers combustion gas control assembly, combustion gas control assembly sends instruction, starts forced burning blower fan assembly, and whether detect blast switch normal, not, cleaning and back cleaning showed the fan trouble code before blower fan was finished, and closed the combustion gas heater switch, after ascertaining the reason, open the combustion gas heater switch again, whether after repetition is above, it is normal to detect blast switch, normally, blower fan begins preceding cleaning; Whether detected temperatures sensor and gas control valve assembly be normal after 3 seconds, not, displays temperature sensor or gas control valve assembly failure code, blower fan begin the back cleaning, close the combustion gas heater switch, after ascertaining the reason, open the combustion gas heater switch again, repeat above program, after detected temperatures sensor and gas control valve assembly are normal, high electric field pulse begins discharge, whether 0.5-1 the segmentation magnetic valve after second in the gas control valve assembly is opened, combustion gas passes to burner, lighted in 8 seconds, not, show the ignition failure code, closed electromagnetic valve blast tube, blower fan begin the back cleaning, after the back cleaning finishes, close the combustion gas heater switch; After ascertaining the reason, open the combustion gas heater switch again, repeat above program after, 8 second inner burner lighted, behind the flame inductive needle perception flame, high electric field pulse stops discharge, burner normal combustion heating.When hot water was heated to 50 ℃, the cryostat on the heat exchanger disconnected, and burner continues heating by 50% rated heat input, rated heat load; When hot water is heated to 60 ℃, temperature controller/overtemperature protection device deenergization, heating finishes, and electrical heating indicator lamp and combustion gas burner on light extinguish.When the hot water temperature in being stored in enamel inner container was lower than 60 ℃, temperature controller/overtemperature protection device was connected power supply, and electrical heating and combustion gas heating start heating simultaneously; electrical heating indicator lamp and combustion gas burner on light are bright; hot recycle pump starts once more, and electrothermal tube energising is to the hot water heating that circulates once more.
When the utility model only heats with combustion gas; open the combustion gas heater switch; actual water temperature is lower than temperature controller/overtemperature protection device temperature is set; the combustion gas burner on light is bright; hot recycle pump starts; the water that is stored in the enamel inner container begins to flow; the signal that circulation heating starting switch flows water offers combustion gas control assembly; combustion gas control assembly sends instruction, starts the blower fan assembly, and blast switch detects normal; blower fan begins preceding cleaning; after 3 seconds detected temperatures sensor and gas control valve assembly normal after, high electric field pulse begins discharge, 0.5-1 after second the segmentation magnetic valve in the gas control valve assembly be opened; burner is delivered in combustion gas; 8 second inner burner lighted, high electric field pulse stop the discharge, burner enters normal combustion.In above process, as detect oriented topic, can show corresponding failure code, begin back cleaning with rear fan, close the combustion gas heater switch this moment, ascertain the reason and the correction problem after, open the combustion gas heater switch again, repeat above program.When water was heated to 50 ℃, the cryostat on the heat exchanger disconnected, and burner continues heating by 50% rated heat input, rated heat load; When hot water is heated to 60 ℃, be attached to the temperature controller/overtemperature protection device deenergization on the inner bag, heating finishes, and the combustion gas burner on light extinguishes.When the hot water temperature in being stored in enamel inner container was lower than 60 ℃, the temperature controller/overtemperature protection device that is attached on the enamel inner container was connected power supply, and the combustion gas burner on light is bright, the hot recycle pump energising, and water heater is heated to water once more by abovementioned steps temperature is set.
When the utility model is only used electrical heating, open the electrical heating switch, actual water temperature is lower than temperature controller/overtemperature protection device temperature is set, the A.C. contactor energising, the normally opened contact adhesive on it, the electrical heating indicator lamp is bright, and electric heating tube begins heating.When hot water is heated to 60 ℃, be attached to the temperature controller/overtemperature protection device deenergization on the inner bag, the electrical heating indicator lamp extinguishes, and water heater enters insulation or dormant state.When the hot water temperature in being stored in enamel inner container was lower than 60 ℃, the temperature controller/overtemperature protection device that is attached on the enamel inner container was connected power supply, and the electrical heating indicator lamp is bright, and water heater enters heated condition, once more water is heated to temperature is set.
Claims (6)
1; a kind of outer circulation efficient energy-saving gas displacement type water heater; include urceolus (23); enamel inner container (13); water heater heat-insulation layer (16); urceolus bottom end cover combination (19); sewage draining exit (20); cold water inlet (21); hot water outlet (30); fuel gas inlet (11); temperature, pressure relief valve connection (3); urceolus loam cake (32); anodic magnesium rod (17) in the enamel inner container (13) and bracing ring (18); it is characterized in that being installed with gas combustion apparatus (7) in the outer jacket (8) of the side on urceolus (23) top; be surrounded with heat exchanger (6) on this gas combustion apparatus; the arrival end of heat exchanger (6) is provided with circulation heating starting switch (26); the arrival end of this starting switch (26) is connected with hot recycle pump (22); the arrival end of hot recycle pump (22) and enamel inner container (13) lead to; heat exchanger (6) is provided with overheat controller (4) and cryostat (5); the port of export of heat exchanger (6) also is provided with temperature sensor (10); the outlet of this heat exchanger (6) is passed urceolus (23) and is led to enamel inner container (13); be provided with electrothermal tube (15) in the bottom of enamel inner container (13); post temperature controller/overtemperature protection device (25) on enamel inner container (13) outer surface; electric controlling assembly (36) is arranged at the urceolus bottom, and the top of gas combustion apparatus (7) is provided with forced burning blower fan assembly.
2, by the described outer circulation efficient energy-saving gas of claim 1 displacement type water heater, it is characterized in that aforesaid gas combustion apparatus (7) adopts the burner with high efficiency assembly of the forced burning of gas instantaneous water heater, this device includes combustion gas control assembly (9), gas control valve assembly (27), burner, segmentation magnetic valve (28), exhaust fume collecting hood (29) and outer smokejack connector (33), the inlet end of gas control valve assembly (27) is connected with fuel gas inlet (11), the outlet side of gas control valve assembly (27) is connected with burner, the control input end of gas control valve assembly (27) is connected with the output of combustion gas control assembly (9), exhaust fume collecting hood (29) is fixedly arranged on the top of gas combustion apparatus (7), and the upper end of exhaust fume collecting hood (29) is provided with outer smokejack connector (33).
3, by the described outer circulation efficient energy-saving gas of claim 1 displacement type water heater, it is characterized in that aforesaid forced burning blower fan assembly adopts the forced burning blower fan assembly of the forced burning of gas instantaneous water heater, it is made of blower fan (31), fan starting electric capacity (1), blast switch (2), fan starting electric capacity (1) is electrically connected with blower fan (31), blower fan (31) is arranged at outer smokejack connector (33) one sides, and the input of blower fan (31) and blast switch (2) is connected with the output of combustion gas control assembly (9) respectively.
4; by the described outer circulation efficient energy-saving gas of claim 1 displacement type water heater; it is characterized in that aforesaid electric controlling assembly (36) includes A.C. contactor (24); electrical heating switch (34); combustion gas heater switch (35); the windings in series of electrical heating switch (34) and A.C. contactor (24); combustion gas heater switch (35) is connected with the power end of aforesaid hot recycle pump (22); the normally opened contact of A.C. contactor (24) is connected with aforesaid electrothermal tube (15); these three series circuits are connected with aforesaid temperature controller (25) output after being connected in parallel, and temperature controller/overtemperature protection device (25) input is connected with AC power through attaching plug (12).
5; by the described outer circulation efficient energy-saving gas of claim 2 displacement type water heater; the power input that it is characterized in that aforesaid combustion gas control assembly (9) is connected with temperature controller/overtemperature protection device (25) output, the control signal I/O end that assembly (9) is controlled in combustion gas respectively with aforesaid temperature sensor (10); cryostat (5); overheat controller (4); circulation heating starting switch (26); gas combustion apparatus (7); blast switch (2); blower fan (31); gas control valve assembly (27) is connected with the control signal output/input of segmentation magnetic valve (28).
6,, it is characterized in that also being provided with electrothermal tube protecgulum (14) on the outer urceolus (23) of aforesaid electrothermal tube (15) by the described outer circulation efficient energy-saving gas of claim 1 displacement type water heater.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201882052U CN201129846Y (en) | 2007-11-13 | 2007-11-13 | Outer circulation high-efficiency and energy-saving gas positive displacement water heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201882052U CN201129846Y (en) | 2007-11-13 | 2007-11-13 | Outer circulation high-efficiency and energy-saving gas positive displacement water heater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201129846Y true CN201129846Y (en) | 2008-10-08 |
Family
ID=40017700
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201882052U Expired - Lifetime CN201129846Y (en) | 2007-11-13 | 2007-11-13 | Outer circulation high-efficiency and energy-saving gas positive displacement water heater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201129846Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102116501A (en) * | 2009-12-31 | 2011-07-06 | 上海波宝仟赫科技有限公司 | Hybrid power wall-hung boiler |
| CN102853530A (en) * | 2012-09-10 | 2013-01-02 | 柳州市京阳节能科技研发有限公司 | Automatic pneumoelectric instant heating shower device |
-
2007
- 2007-11-13 CN CNU2007201882052U patent/CN201129846Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102116501A (en) * | 2009-12-31 | 2011-07-06 | 上海波宝仟赫科技有限公司 | Hybrid power wall-hung boiler |
| CN102853530A (en) * | 2012-09-10 | 2013-01-02 | 柳州市京阳节能科技研发有限公司 | Automatic pneumoelectric instant heating shower device |
| CN102853530B (en) * | 2012-09-10 | 2015-02-18 | 柳州市京阳节能科技研发有限公司 | Automatic pneumoelectric instant heating shower device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201875806U (en) | Dual-purpose wall-hung furnace for plate-type heat exchanger | |
| CN202032728U (en) | Step water gradually heating intelligent double-bladder electromagnetic water heater | |
| CN203177289U (en) | Air source heat pump fuel gas comprehensive heating system | |
| CN110186200A (en) | A kind of burning antifreeze control method and the gas heater using it | |
| CN203010927U (en) | Novel sleeve type gas heating water heater | |
| CN201129846Y (en) | Outer circulation high-efficiency and energy-saving gas positive displacement water heater | |
| CN101832633A (en) | Heating and bathing gas water heater for double volume and condensation heat exchange system | |
| CN102116501A (en) | Hybrid power wall-hung boiler | |
| CN201615538U (en) | Double-source wall-mounted boiler | |
| CN202660755U (en) | Gas water heater | |
| CN103892699A (en) | Steam generator capable of improving heat energy efficiency | |
| CN2731357Y (en) | Compensation heater for solar energy water-heater | |
| CN208475619U (en) | Combustion gas and electric heating wall-hung boiler | |
| CN207501443U (en) | A kind of gas heating stove | |
| CN201637078U (en) | Electromagnetic water heater | |
| CN201497151U (en) | Full-automatic three-level heating hot and boiled water steam engine | |
| CN102313315A (en) | Automatically-heated gas water heater with auxiliary solar-energy heat supply | |
| CN220303868U (en) | Gas water heater | |
| CN2562129Y (en) | Two-way automatic household boiler by gas or electric power | |
| CN201945039U (en) | Automatic heating gas water heater capable of assisting solar energy heat supply | |
| CN203873549U (en) | Steam generator capable of improving heat energy efficiency | |
| CN2369127Y (en) | Water heater | |
| CN202032754U (en) | Electrical heating device | |
| CN220436810U (en) | Gas heating water heater | |
| CN221076791U (en) | Gas hot water heater |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Chongqing Sanwennuan Electric Co., Ltd. Assignor: Jing Hong Contract record no.: 2010500000071 Denomination of utility model: Outer circulation high-efficiency and energy-saving gas positive displacement water heater Granted publication date: 20081008 License type: Exclusive License Record date: 20101019 |
|
| CX01 | Expiry of patent term |
Granted publication date: 20081008 |