CN103900139B - A kind of inner water-tank air energy heat pump heating system - Google Patents
A kind of inner water-tank air energy heat pump heating system Download PDFInfo
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- CN103900139B CN103900139B CN201210574799.6A CN201210574799A CN103900139B CN 103900139 B CN103900139 B CN 103900139B CN 201210574799 A CN201210574799 A CN 201210574799A CN 103900139 B CN103900139 B CN 103900139B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/12—Hot water central heating systems using heat pumps
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Abstract
Disclosure one inner water-tank air energy heat pump heating system, including unit part, heat supply part, heating part and intelligent control part, unit part includes air energy heat pump heating part, heating partial, water route pipeline fitting part and control circuit part；Control circuit part is for starting compressor heat supply during according to low capacity water tank temperature lower than the compressor start temperature difference, when detecting that controlling heating partial when temperature reaches design temperature does not export；The flow detected according to the Inlet and outlet water temperature difference detected and water route pipeline fitting part when detecting and can not reach design temperature, controls the electrical heating power that heating partial output is required；When air energy heat pump heating part and heating partial be all total power output low capacity water tank temperature also not up to design temperature time, according to the temperature controlled water road pipeline fitting part detected by Water flow adjusting valve regulating water flow so that coolant-temperature gage is constant.
Description
Technical field
The present invention relates to inner water-tank air energy heat pump heat supply heating field, particularly relate to a kind of plug and play formula inner water-tank air energy heat pump heating system with Based Intelligent Control.
Background technology
Traditional inner water-tank air energy heat pump heating system is generally made up of three parts, and one is host machine part, and two is tank parts, and three is heating system part；For household type water tank, 1, capacity be typically in 150-320L, water tank is bulky, substantial portion of construction area need to be occupied during installation, even if some water tanks use support to be installed on outside wall, due to the weight that water tank itself adds water, this type of mounting means is quite dangerous；2, no matter inner water tank itself adopts material and technique, be stainless steel inner container or enamel inner container, and due to the defect of manufacturing process, radiator leak is difficult to avoid that；3, the heat exchanger within water tank is generally adopted copper pipe or stainless steel tube, and in the poor area of water quality, heat exchanger tube can be corroded and bore a hole, and causes coolant leakage, once leak, will be fatefulue for unit；4, need connecting tube to be connected between main frame with water tank, be so difficult to the coolant leakage phenomenon avoiding artificially producing when installing；5, due to the hot pump characteristics of storage-type, water temperature need to be risen to higher temperature, and required time is longer, it is impossible to meet and immediately use water requirement, and to using the water later stage, fluctuating temperature is relatively big, the comfortableness that impact uses；It addition, the height of condensation temperature determines the energy consumption of unit, the unit of conventional belt water tank runs for a long time under high condensation temperature and high condensing pressure, and the life-span to compressor will be a very big test；6, adopt the water tank of storage-type, be typically necessary mixed water during with water, so there will be Railway Project, 1) the hot water utilization rate inside water tank is not high；2) water tank is in insulating process, and declining inevitably occurs in water temperature, and increases energy consumption；3), during user's house ornamentation water valve, must need water mixing valve is installed, increase material cost.When 7, being typically for the heat that heating system is taked in water tank, it is required at the internally installed heat exchange coil of water tank, constitutes closed-loop path with grounding heat coil tube or radiator and water circulating pump, which increase the difficulty of water tank production technology, also occupies water tank capacity；8, tradition heating system is without Based Intelligent Control, heating system can not be carried out various long-range monitoring, the modern more hommization demand of people cannot be met: 1) such as user's needs in advance or time opening heat, but family nobody time, then cannot realize；2) user's long period outside, forget to close heating or heat supply water, then cannot be carried out remotely closing heating or heat supply operation；3) there is some fault in traditional heating system, it is necessary to carry out field assay eliminating, and particularly site is weak or from far-off regions after sale, and after-sale service promptness and user satisfaction are substantially reduced.
Summary of the invention
The defect existed for above-mentioned technology and deficiency, it is proposed to a kind of inner water-tank plug and play formula air energy heat pump heating system, it is while supplying hot water, it is possible to meet heating requirement.
For solving above-mentioned technical problem, a technical scheme provided by the invention is:
A kind of inner water-tank air energy heat pump heating system is provided, including unit part, heat supply part, heating part and intelligent control part, described unit part includes air energy heat pump heating part, heating partial, water route pipeline fitting part and control circuit part；Described control circuit part is for starting compressor heat supply during according to the low capacity water tank temperature detected lower than the compressor start temperature difference, when detecting that controlling heating partial when low capacity water tank temperature reaches design temperature does not export；Described control circuit part is additionally operable to when detecting that low capacity water tank temperature can not reach design temperature, according to the flow that the Inlet and outlet water temperature difference detected and water route pipeline fitting part detect, controls the electrical heating power that heating partial output is required；Described control circuit part be additionally operable to when air energy heat pump heating part and heating partial be all total power output and low capacity water tank temperature also not up to design temperature time, according to the temperature controlled water road pipeline fitting part detected by Water flow adjusting valve regulating water flow so that coolant-temperature gage is constant；Described control circuit part is additionally operable to when receiving heating demands instruction; temperature according to the indoor environment temperature detected or grounding heat coil tube judges whether to perform heating instruction; perform heating function when the temperature of indoor environment temperature or grounding heat coil tube reaches to open heating demands temperature, close heating function when temperature indoor environment temperature or grounding heat coil tube being detected reaches shutdown temperature.
Wherein, described air energy heat pump heating part includes compressor, the first electromagnetic valve, the second electromagnetic valve, the 3rd electromagnetic valve, the 4th electromagnetic valve, low capacity water tank, heating plate type heat exchanger, filter, expansion valve, vaporizer, release condenser, release throttle capillary tube, gas-liquid separator, fan blade, motor, defrosting capillary tube, after being connected by pipeline with upper-part, form the heat pump heat supply heating system closed；Wherein, the compressor that is sequentially connected with, the first electromagnetic valve, low capacity water tank, heating plate type heat exchanger, filter, expansion valve, vaporizer, gas-liquid separator, compressor form compressor assembly the first heat supply heating path；Compressor, the 4th electromagnetic valve being sequentially connected, the plate type heat exchanger that heats, filter, expansion valve, vaporizer, gas-liquid separator, compressor form compressor assembly the second heat supply heating path；The compressor that is sequentially connected, the 3rd electromagnetic valve, release condenser, release throttle capillary tube, vaporizer, gas-liquid separator, compressor form compressor assembly release path；Compressor, the second electromagnetic valve being sequentially connected, the capillary tube that defrosts, vaporizer, gas-liquid separator, compressor form compressor assembly defrosting path.
Wherein, described low capacity water tank is coated with a masking foil heating tape, and described masking foil heating tape is provided with temperature controller, and described temperature controller is for judging whether to need to open described masking foil heating tape according to ambient temperature and water tank temperature.
Wherein, heating partial includes heating unit assembly, silicon controlled component, the first temperature controller, the second temperature controller, casing, heating unit assembly water inlet pipe, heating unit assembly outlet pipe, terminal board etc..
Wherein, water flow switch that described water route pipeline fitting part includes being sequentially connected, low capacity water tank, water ga(u)ge, Water flow adjusting valve, wherein, Water flow adjusting valve is connected with described heating partial.
Wherein, described control circuit part includes master control borad and guidance panel, and described master control borad includes MCU, temperature sensing circuit and electrical heating power control circuit.
Wherein, described intelligent control part includes described control circuit part and controls terminal, server, wireless communication module；Described server is connected with described control terminal and wireless communication module respectively by wireless network, described guidance panel connects master control borad by a RS485/232 communicating circuit, described wireless communication module carries out communication for terminal with controlling terminal with server by wireless network, and described wireless communication module is connected with described master control borad by the 2nd RS485/232 communicating circuit.
Wherein, described wireless communication module is integrated with described guidance panel.
Wherein, described wireless communication module is integrated with master control borad.
The invention has the beneficial effects as follows, a kind of inner water-tank plug and play formula Tempeerature-constant air energy heat pump heat supply heating system with Based Intelligent Control is proposed, integrated design, produce and install more convenient, and high water usage comfort level provides heating function while can be put forward, thus realizing the multiformity of unit function, and realize network-enabled intelligent and remotely control, meet the modern more hommization demand of people.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of a kind of inner water-tank air energy heat pump heating system in first embodiment of the invention；
Fig. 2 is the present invention is the structural representation of heating partial of the present invention；
Fig. 3 is the present invention is the schematic diagram of intelligent control part in an embodiment.
Main element symbol description
Compressor 1；First electromagnetic valve 2；Low capacity water tank 4；Gas-liquid separator 9；Filter 10；
Expansion valve 11；Second electromagnetic valve 12；Defrosting capillary tube 13；3rd electromagnetic valve 14；Motor 15；
Fan blade 16；Release capillary tube 17；Vaporizer 18；Release condenser 19；4th electromagnetic valve 21；
Heating plate type heat exchanger 23；Water flow switch 8；Water ga(u)ge 5；
Water flow adjusting valve 6；Heating partial 7；Heating unit assembly outlet pipe 71；Heating unit assembly 72；
First temperature controller 73；Casing 74；Second temperature controller 75；Terminal board 76；Silicon controlled component 77；
Heating unit assembly water inlet pipe 78；Showerhead 201；Bathtub 202；Water circulating pump 24；
Water flow switch 25；Grounding heat coil tube or fin 22；Masking foil heating tape 3.
Detailed description of the invention
By describing the technology contents of the present invention, structural feature in detail, being realized purpose and effect, below in conjunction with embodiment and coordinate accompanying drawing to be explained in detail.
Refer to Fig. 1, schematic diagram for inner water-tank air energy heat pump heating system a kind of in first embodiment of the invention, inner water-tank air energy heat pump heating system includes unit part, heat supply part, heating part and intelligent control part, described unit part includes air energy heat pump heating part, heating partial, water route pipeline fitting part and control circuit part.
Described control circuit part is for starting compressor heat supply during according to the low capacity water tank temperature detected lower than the compressor start temperature difference, when detecting that controlling heating partial when low capacity water tank temperature reaches design temperature does not export；Described control circuit part is additionally operable to when detecting that low capacity water tank temperature can not reach design temperature, according to the flow that the Inlet and outlet water temperature difference detected and water route pipeline fitting part detect, controls the electrical heating power that heating partial output is required；Described control circuit part be additionally operable to when air energy heat pump heating part and heating partial be all total power output and low capacity water tank temperature also not up to design temperature time, according to the temperature controlled water road pipeline fitting part detected by Water flow adjusting valve regulating water flow so that coolant-temperature gage is constant；Described control circuit part is additionally operable to when receiving heating demands instruction; temperature according to the indoor environment temperature detected or grounding heat coil tube judges whether to perform heating instruction; perform heating function when the temperature of indoor environment temperature or grounding heat coil tube reaches to open heating demands temperature, close heating function when temperature indoor environment temperature or grounding heat coil tube being detected reaches shutdown temperature.
Described unit part includes air energy heat pump heating part, heating partial 7, water route pipeline fitting part and control circuit part.Specifically, described air energy heat pump heating part includes compressor the 1, first electromagnetic valve 2, low capacity water tank 4, gas-liquid separator 9, filter 10, expansion valve the 11, second electromagnetic valve 12, defrosting capillary tube the 13, the 3rd electromagnetic valve 14, motor 15, fan blade 16, release capillary tube 17, vaporizer 18, release condenser the 19, the 4th electromagnetic valve 21, heating plate type heat exchanger 23.
Wherein, compressor the 1, first electromagnetic valve 2, the low capacity water tank 4 being sequentially connected with, the plate type heat exchanger 23 that heats, filter 10, expansion valve 11, vaporizer 18, gas-liquid separator 9, compressor 1 form compressor assembly the first heat supply heating path；Compressor the 1, the 4th electromagnetic valve 21 being sequentially connected, the plate type heat exchanger 23 that heats, filter 10, expansion valve 11, vaporizer 18, gas-liquid separator 9, compressor 1 form compressor assembly the second heat supply heating path；Compressor the 1, the 3rd electromagnetic valve 14 that is sequentially connected, release condenser 19, release capillary tube 17, vaporizer 18, gas-liquid separator 9, compressor 1 form compressor assembly release path；Compressor the 1, second electromagnetic valve 12 being sequentially connected, the capillary tube 13 that defrosts, vaporizer 18, gas-liquid separator 9, compressor 1 form compressor assembly defrosting path.In system above process flow operation, motor 15 fan blade 16 will be opened as desired with out of service.
Described control circuit part includes master control borad and guidance panel, and described master control borad includes MCU, temperature sensing circuit and electrical heating power control circuit.Described control circuit part is additionally operable to control described 4th electromagnetic valve or the 5th electromagnetic valve work according to the leaving water temperature detected when occurring overheating problem after selecting correct compressor combination.Described control circuit part is additionally operable to when occurring overheating problem after selecting correct compressor combination by electronic water mixing valve, the turnover ratio of adjusting heat pump water outlet and cold water.
Water flow switch 8 that described water route pipeline fitting part includes being sequentially connected, low capacity water tank 4, water ga(u)ge 5, Water flow adjusting valve 6, wherein, Water flow adjusting valve 6 is connected with described heating partial 7.Owing to water tank volume is only small, consider in the relatively low situation of ambient temperature, water temperature drop is very fast, for avoiding without under regimen condition, compressor start, described low capacity water tank 4 is coated with a masking foil heating tape, and described masking foil heating tape is provided with temperature controller, and described temperature controller is for judging whether to need to open described masking foil heating tape 3 according to ambient temperature and water tank temperature.
Refer to Fig. 2, for the structural representation of heating partial of the present invention.Heating partial includes heating unit assembly outlet pipe 71, heating unit assembly the 72, first temperature controller 73, casing the 74, second temperature controller 75, terminal board 76, silicon controlled component 77, heating unit assembly water inlet pipe 78.Heating partial operation principle is: by leaving water temperature sensors detect coolant-temperature gage and in design temperature comparison, feed back information to MCU, judge whether to need out heating partial, control heating unit assembly 72 electric after, silicon controlled component 77 is accurately controlled by MCU, and provide required heating power, thus ensureing that water outlet is constant.
Refer to Fig. 3, for the schematic diagram of intelligent control part in an embodiment of the present invention.Described intelligent control part includes described control circuit part and controls terminal, server, wireless communication module, described server is connected with described control terminal and wireless communication module respectively by wireless network, described guidance panel connects master control borad by a RS485/232 communicating circuit, described wireless communication module carries out communication for terminal with controlling terminal with server by wireless network, and described wireless communication module is connected with described master control borad by the 2nd RS485/232 communicating circuit.Wherein, in the present embodiment, described wireless communication module is integrated with described guidance panel, and in another embodiment, described wireless communication module is integrated with master control borad.
Described heating part divides and includes showerhead 201, bathtub 202, and its configuration is determined according to actual finishing and the installation situation of user family, uses water requirement with what water end (W.E.) can meet multiple water spot simultaneously.Described heating part includes water circulating pump 24, water flow switch 25, grounding heat coil tube or fin 22.According to user's demand to heating, the use of grounding heat coil tube and fin can be met simultaneously.
The advantage adopting such scheme is in that: 1, adopt the built-in design of water tank, saves installing space, easy for installation and use safety；2, owing to inner water-tank capacity is little, general only about 15L, welding and processing technique are easy to ensure, and the leak detection workload for integrated water tank is also relatively little, therefore substantially can stop the phenomenon that water tank leaks；3, owing to adopting the significantly high titanium pipe of corrosion-resistant degree, even if water quality is poor again, also can guarantee that and be not corroded perforation at service life inner coil pipe, cause the situation that unit is scrapped；4, owing to decreasing the link using connecting tube, the probability of coolant leakage is significantly reduced；5, the unit designed by this programme, it is possible to accomplish plug and play, the time of stand-by water such as saves, it is ensured that constant-temperature effluent, puies forward the comfortableness of high water usage, and can ensure that by the persistence of water；Unit is at this with under regimen condition, and efficiency is higher, more energy efficient, is conducive to source pump to safely and steadily run, thus ensureing the service life of unit；6, water tank volume own is only small, does not have the problem that hot water utilization rate is low, adds employing tinfoil paper heating tape, does not more have owing to heat insulation effect is not good, and the problem causing energy waste additionally can reduce the use cost of user's valve class；7, by designing use release condenser, while avoiding leaving water temperature too high, it is possible to reduce the operating load of unit, thus greatly reducing units consumption, the requirement that national energy-saving reduces discharging is met；8, according to dump power, when judging that increasing the water yield also ensures that water outlet is constant, by electronic water mixing valve, carry out bypassing mixed water, total water flow so can be made bigger, will be more comfortable with water；9, adopt built-in little waterbox design, solve compressor and not stopping period, it is ensured that continue water demand；10, under the premise meeting hot-water supply requirement, panel can be operated by and select heating mode, it is achieved rooms demand；11, the water tank of this heating system is built-in, and has thermostat hot water supply function and heating function；12, adopting remote control function, user can use control terminal, such as mobile phone or other equipment that can network, heating system is carried out intelligentized control method, thus embodying the human oriented design of system.
The foregoing is only embodiments of the invention; not thereby the scope of the claims of the present invention is limited; every equivalent structure utilizing description of the present invention and accompanying drawing content to make or equivalence flow process conversion; or directly or indirectly it is used in other relevant technical fields, all in like manner include in the scope of patent protection of the present invention.
Claims (9)
1. an inner water-tank air energy heat pump heating system, it is characterised in that including unit part, heat supply part, heating part and intelligent control part, described heating part includes water circulating pump, water flow switch, grounding heat coil tube or fin；Described unit part includes air energy heat pump heating part, heating partial, water route pipeline fitting part and control circuit part；Described control circuit part is for starting compressor heat supply during according to the low capacity water tank temperature detected lower than the compressor start temperature difference, when detecting that controlling heating partial when low capacity water tank temperature reaches design temperature does not export；Described control circuit part is additionally operable to when detecting that low capacity water tank temperature can not reach design temperature, according to the flow that the Inlet and outlet water temperature difference detected and water route pipeline fitting part detect, controls the electrical heating power that heating partial output is required；Described control circuit part be additionally operable to when air energy heat pump heating part and heating partial be all total power output and low capacity water tank temperature also not up to design temperature time, according to the temperature controlled water road pipeline fitting part detected by Water flow adjusting valve regulating water flow so that coolant-temperature gage is constant；Described control circuit part is additionally operable to when receiving heating demands instruction; temperature according to the indoor environment temperature detected or grounding heat coil tube judges whether to perform heating instruction; perform heating function when the temperature of indoor environment temperature or grounding heat coil tube reaches to open heating demands temperature, close heating function when temperature indoor environment temperature or grounding heat coil tube being detected reaches shutdown temperature.
2. a kind of inner water-tank air energy heat pump heating system according to claim 1, it is characterized in that, described air energy heat pump heating part includes compressor, the first electromagnetic valve, the second electromagnetic valve, the 3rd electromagnetic valve, the 4th electromagnetic valve, low capacity water tank, heating plate type heat exchanger, filter, expansion valve, vaporizer, release condenser, release throttle capillary tube, gas-liquid separator, fan blade, motor, defrosting capillary tube, after being connected by pipeline with upper-part, form the heat pump heat supply heating system closed；Wherein,
The compressor that is sequentially connected with, the first electromagnetic valve, low capacity water tank, heating plate type heat exchanger, filter, expansion valve, vaporizer, gas-liquid separator, compressor form compressor assembly the first heat supply heating path；
Compressor, the 4th electromagnetic valve being sequentially connected, the plate type heat exchanger that heats, filter, expansion valve, vaporizer, gas-liquid separator, compressor form compressor assembly the second heat supply heating path；
The compressor that is sequentially connected, the 3rd electromagnetic valve, release condenser, release throttle capillary tube, vaporizer, gas-liquid separator, compressor form compressor assembly release path；
Compressor, the second electromagnetic valve being sequentially connected, the capillary tube that defrosts, vaporizer, gas-liquid separator, compressor form compressor assembly defrosting path.
3. a kind of inner water-tank air energy heat pump heating system according to claim 1, it is characterized in that, described low capacity water tank is coated with a masking foil heating tape, described masking foil heating tape is provided with temperature controller, and described temperature controller is for judging whether to need to open described masking foil heating tape according to ambient temperature and water tank temperature.
4. a kind of inner water-tank air energy heat pump heating system according to claim 1, it is characterized in that, heating partial includes heating unit assembly, silicon controlled component, the first temperature controller, the second temperature controller, casing, heating unit assembly water inlet pipe, heating unit assembly outlet pipe, terminal board.
5. a kind of inner water-tank air energy heat pump heating system according to claim 1, it is characterized in that, water flow switch that described water route pipeline fitting part includes being sequentially connected, low capacity water tank, water ga(u)ge, Water flow adjusting valve, wherein, Water flow adjusting valve is connected with described heating partial.
6. a kind of inner water-tank air energy heat pump heating system according to claim 1, it is characterised in that described control circuit part includes master control borad and guidance panel, and described master control borad includes MCU, temperature sensing circuit and electrical heating power control circuit.
7. a kind of inner water-tank air energy heat pump heating system according to claim 6, it is characterised in that described intelligent control part includes described control circuit part and controls terminal, server, wireless communication module；Described server is connected with described control terminal and wireless communication module respectively by wireless network, described guidance panel connects master control borad by a RS485/232 communicating circuit, described wireless communication module carries out communication for terminal with controlling terminal with server by wireless network, and described wireless communication module is connected with described master control borad by the 2nd RS485/232 communicating circuit.
8. a kind of inner water-tank air energy heat pump heating system according to claim 7, it is characterised in that described wireless communication module is integrated with described guidance panel.
9. a kind of inner water-tank air energy heat pump heating system according to claim 7, it is characterised in that described wireless communication module is integrated with master control borad.
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| CN201210574799.6A CN103900139B (en) | 2012-12-25 | 2012-12-25 | A kind of inner water-tank air energy heat pump heating system |
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| CN201210574799.6A CN103900139B (en) | 2012-12-25 | 2012-12-25 | A kind of inner water-tank air energy heat pump heating system |
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| CN103900139A CN103900139A (en) | 2014-07-02 |
| CN103900139B true CN103900139B (en) | 2016-06-29 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104296375A (en) * | 2014-11-03 | 2015-01-21 | 广州德能热源设备有限公司 | Hot water machine unit with air source heat pump |
| CN107062373A (en) * | 2017-05-12 | 2017-08-18 | 朱广艺 | Heating Special water pump water tank integration apparatus and its heating method |
| CN107676858B (en) * | 2017-10-20 | 2020-02-07 | 暖卫仕（北京）热能科技发展有限公司 | Heating system |
| CN112359958A (en) * | 2020-11-02 | 2021-02-12 | 钱小进 | Low-rise building wall with external solar heating structure |
| CN113944951A (en) * | 2021-10-22 | 2022-01-18 | 中铁第四勘察设计院集团有限公司 | Modular water heating device and control method |
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| CN101476777A (en) * | 2009-01-17 | 2009-07-08 | 东莞市康源节能科技有限公司 | Heat pump water heating machine and its operating control method |
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| JP2004076977A (en) * | 2002-08-12 | 2004-03-11 | Corona Corp | Storage type hot water feeder |
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