CN103471244A - Free piston electric heat pump water boiler system - Google Patents

Free piston electric heat pump water boiler system Download PDF

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Publication number
CN103471244A
CN103471244A CN201310412568XA CN201310412568A CN103471244A CN 103471244 A CN103471244 A CN 103471244A CN 201310412568X A CN201310412568X A CN 201310412568XA CN 201310412568 A CN201310412568 A CN 201310412568A CN 103471244 A CN103471244 A CN 103471244A
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China
Prior art keywords
heat
water
heat exchanger
piston
free
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Pending
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CN201310412568XA
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Chinese (zh)
Inventor
罗二仓
张丽敏
陈燕燕
戴巍
余国瑶
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Technical Institute of Physics and Chemistry of CAS
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Technical Institute of Physics and Chemistry of CAS
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Application filed by Technical Institute of Physics and Chemistry of CAS filed Critical Technical Institute of Physics and Chemistry of CAS
Priority to CN201310412568XA priority Critical patent/CN103471244A/en
Publication of CN103471244A publication Critical patent/CN103471244A/en
Pending legal-status Critical Current

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Abstract

A free piston electric heat pump water boiler system comprises a free piston Stirling heat pump system and a boiled water control processing system, wherein the free piston Stirling heat pump system comprises a free piston Stirling heat pump, a lower-temperature end heat exchange circuit and a high-temperature end heat exchange circuit; the boiled water control processing system comprises a water purifier, a heating water tank and a water storage tank which are communicated sequentially. A heating heat exchanger of the high-temperature end heat exchange circuit of the free piston Stirling heat pump system is connected with the heating water tank of the boiled water control processing system. The free piston electric heat pump water boiler system adopts the novel free piston Stirling heat pump which provides the pump heat temperature of more than 100 DEG C. The free piston electric heat pump water boiler system has the advantages of being compact in structure, high in energy efficiency ratio, and the like, and adopted working media are free of pollution. A linear oscillation motor works at the room temperature, so that the linear oscillation motor has long service life. Furthermore, the heating water tank and the boiled water storage tank are separately arranged, so that unboiled water and boiled water and reboiled water are avoided.

Description

A kind of free-piston electric heating pump boiler system
Technical field
The present invention relates to the boiler technical field, relate in particular to a kind of free-piston electric heating pump boiler system of utilizing free-piston electric heating pump heating drinking water.
Background technology
Application at office block, school instruction building, station, airport, dining room, hospitals and other places electric water-boiling device is very general.Currently used boiler is to utilize electrical heating elements that electric energy conversion is heated to drinking water for heat energy mostly, and the topmost problem of these electric water boilers is electric conversion rate lower (generally lower than 90%), is unfavorable for saving the energy.
Along with the development of air source heat pump, Chinese invention granted patent CN2926915Y has proposed heat energy pump type boiled device to improve energy utilization rate.But conventional heat pump is subject to the restriction of hot properties, along with the rising of Water in Water Tanks temperature, the heat pump coefficient can reduce greatly.Be subject to the restriction of working medium and condenser, more difficult heating water to more than 92 ℃.The heat pump boiler that Chinese utility model patent CN200961946Y, CN201532002U and CN201532003U propose combines heat pump with electrical heating, first with heat pump, heat water to 60-85 ℃, then by Electric heating, that water is boiled.This method has improved the utilization of electric energy to a certain extent, but its efficiency still remains further to be improved.The heat pump boiler that Chinese utility model patent CN201954743U proposes adopts multistage temperature difference release heat and increases progressively the heat-obtaining technology, utilizes the condenser assembly device leaving water temperature can be brought up to more than 100 ℃.This device Energy Efficiency Ratio is higher, but the condenser assembly device adopted is composed in series by a plurality of condenser units, and its structure is comparatively complicated.
In the recent period, the people such as Yu Guoyao have proposed a kind of free piston stirling heat engine (application number: 201310020114.8), its structural representation as shown in Figure 1, specifically comprise: cylinder body, linear vibration motor 7, power piston 8 and the displacer 4 be located in this cylinder body, power piston 8 comprises cock body and falcon section, cock body is located in this cylinder body, falcon section is inserted in the coil of linear vibration motor 7, power piston 8 is fixedly connected with the first planar support spring 9, the displacer hold-down support 12 at displacer top is fixedly connected with displacer 4 by the second planar support spring 11, there is compression chamber 6 and expansion chamber 1 in cylinder body, displacer 4 vibrates between compression chamber 6 and expansion chamber 1, also be provided with heat absorbing end heat exchanger 2 and release end of heat heat exchanger 5 on the heat engine inboard wall of cylinder block, cavity between displacer 4 and cylinder body one end is motor back of the body chamber 10, cavity between displacer 4 and power piston 8 forms expansion chamber 1, power piston 8 is vibration between the cavity of the cylinder body other end and expansion chamber 1, the phase lag of displacer 4 is in the phase place of power piston 8, heat absorbing end heat exchanger 2 is near power piston 8, and release end of heat heat exchanger 5 is away from power piston 8, this free piston stirling heat engine can adopt electricity to drive and make free piston stirling heat pump (or heat pump/refrigerating machine dual-purpose system), also can utilize low temperature cold source (as liquified natural gas) and make the free piston stirling generator, as its operation principle of free piston stirling heat pump, be: power piston 8 is simultaneously descending with displacer 4, makes gas working medium in the interior expansion of expansion chamber 1, and temperature reduces, and in heat absorbing end heat exchanger 2, gas absorbs heat from room temperature, power piston 8 is descending, and displacer 4 is up, and gas enters compression chamber 6 from expansion chamber 1 regenerator 3 of flowing through, and in way, from regenerator 3, absorbs heats, and temperature raises, power piston 8 is simultaneously up with displacer 4, makes gas interior compressed at compression chamber 6, by release end of heat heat exchanger 5 to extraneous heat release, power piston 8 is descending, and displacer 4 is up, makes gas enter expansion chamber 1 from compression chamber 6 regenerator 3 of flowing through, in way by thermal release to regenerator 3, gas temperature reduces.It is working medium that this free-piston heat pump adopts gas (as helium etc.), and the hot temperature of pump can reach more than 100 ℃, and efficiency is higher.
Summary of the invention
The object of the invention is to provide a kind of efficient free-piston electric heating pump boiler system of compact conformation, to overcome complex structure or the not high deficiency of thermal conversion efficiency in existing boiler technology.
Technical scheme of the present invention is as follows:
Free-piston electric heating pump boiler system provided by the invention, it is controlled treatment system 32 by free piston stirling heat pump and boiling water and forms; It is characterized in that, described boiling water control treatment system 32 comprise the water purifier 22 that is communicated with successively, heating water tank 23 and in establish the boiling water storage tank 29 of Heat preservation silk 31; Be respectively arranged with temperature sensor and water-level gauge in described heating water tank 23 and boiling water storage tank 29;
Described free piston stirling heat pump comprises the indoor temperature end heat-exchanging loop 14 that air-source heat exchanger 15 is housed on temperature end heat-exchanging loop 18 that heating heat exchanger 20 is housed on free piston stirling heat pump 13, loop and loop; Described temperature end heat-exchanging loop 18 is connected in the release end of heat heat exchanger 5 of described free piston stirling heat pump 13, and the heating water tank 23 that described temperature end heat-exchanging loop 18 is controlled treatment system 32 by heating heat exchanger 20 with boiling water is connected; Described indoor temperature end heat-exchanging loop 14 is connected in the heat absorbing end heat exchanger 2 of described free piston stirling heat pump 13; And
Be loaded on water purifier water intaking valve 21 on water purifier 22 water inlet pipelines, be loaded on the storage tank water inlet control valve 26 on connecting line between heating water tank delivery port and storage tank water inlet; With the storage tank outlet valve 30 that is loaded on boiling water storage tank 29 bottom delivery ports;
Described heating water tank 23 volumes are less than boiling water storage tank 29 volumes.
Described free piston stirling heat pump 13 is the free piston stirling heat engine, and its working medium is helium or nitrogen.
Described free piston stirling heat engine comprises cylinder body, linear vibration motor 7, power piston 8 and the displacer 4 be located in described cylinder body, power piston 8 comprises cock body and falcon section, cock body is located in this cylinder body, falcon section inserts in the coil of linear vibration motor 7, power piston 8 is fixedly connected with the first planar support spring 9, the displacer hold-down support 12 at displacer 4 tops is fixedly connected with displacer 4 by the second planar support spring 11, cavity between displacer 4 and cylinder body one end forms compression chamber 6, cylinder body internally-powered piston 8 forms motor back of the body chamber 10 with the cavity of the cylinder body other end, cavity in cylinder body between displacer and power piston forms expansion chamber 1, power piston 8 vibration between motor back of the body chamber 10 and expansion chamber 1, the phase lag of displacer 4 is in the phase place of power piston 8, also be provided with heat absorbing end heat exchanger 2 and release end of heat heat exchanger 5 on inboard wall of cylinder block, heat absorbing end heat exchanger 2 is near power piston 8, release end of heat heat exchanger 5, away from power piston 8, is provided with regenerator 3 between heat absorbing end heat exchanger 2 and release end of heat heat exchanger 5.
On the connecting line be connected with heat absorbing end heat exchanger 2 at described air-source heat exchanger 15 delivery outlets, room temperature pump 16 is housed; On the connecting line of the input of described heating heat exchanger 20 and release end of heat heat exchanger 5, high-temperature pump 19 is housed.
Working medium in described temperature end heat-exchanging loop 18 is the liquid that conduction oil or boiling point are 100-200 ℃;
Described heating heat exchanger 20 is arranged on heating water tank 23 bottoms or spiral surrounding in heating water tank 23.
Blower fan 17 is equipped with in described air-source heat exchanger 15 outsides.
The volume of described boiling water storage tank 29 is the 20-200 liter as required, and heating water tank 23 volumes are the 2-5 liter.
Free-piston electric heating pump boiler system provided by the invention has adopted novel free piston stirling heat pump, and its compact conformation, Energy Efficiency Ratio working medium high, that adopt is pollution-free; And linear vibration motor is operated in room temperature, there is the higher life-span; In addition, adopt heating water tank and the separated method of boiling water storage tank to avoid the appearance of " water " and " thousand boiling water " phenomenon; Heating water tank volumetric ratio storage tank volume is much smaller, can shorten the stand-by period after boiling water is finished, and the continuous effluent amount is greater than boiling water storage tank volume.
The accompanying drawing explanation
Fig. 1 is free piston stirling heat engine structural representation;
The structural representation that Fig. 2 is free-piston electric heating pump boiler system of the present invention (embodiment).
The specific embodiment
Further describe the present invention below in conjunction with drawings and Examples; But described embodiment is the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making under the creative work prerequisite the every other embodiment obtained, belong to the scope of protection of the invention.
The structural representation that Fig. 2 is free piston stirling electric heating pump boiler system of the present invention (embodiment).As shown in Figure 2, free-piston electric heating pump boiler system provided by the invention, it is controlled treatment system 32 by free piston stirling heat pump and boiling water and forms; Described boiling water control treatment system 32 comprise the water purifier 22 that is communicated with successively, heating water tank 23 and in establish the boiling water storage tank 29 of Heat preservation silk 31; Be provided with heating water tank temperature sensor 24 and heating water tank water-level gauge 25 in described heating water tank 23, be provided with storage tank temperature sensor 27 and water storage tank water level meter 28 in described boiling water storage tank 29;
Described free piston stirling heat pump comprises the indoor temperature end heat-exchanging loop 14 that air-source heat exchanger 15 is housed on temperature end heat-exchanging loop 18 that heating heat exchanger 20 is housed on free piston stirling heat pump 13, loop and loop; Described temperature end heat-exchanging loop 18 is connected in the release end of heat heat exchanger 5 of described free piston stirling heat pump 13, and the heating water tank 23 that described temperature end heat-exchanging loop 18 is controlled treatment system 32 by heating heat exchanger 20 with boiling water is connected; Described indoor temperature end heat-exchanging loop 14 is connected in the heat absorbing end heat exchanger 2 of described free piston stirling heat pump 13; And
Be loaded on water purifier water inlet valve 22 on water purifier 22 water inlet pipelines, be loaded on the storage tank water inlet control valve 26 on connecting line between heating water tank delivery port and storage tank water inlet; With the storage tank outlet valve 30 that is loaded on boiling water storage tank 29 bottom delivery ports.
(application number: 201310020114.8), its working medium is helium or nitrogen to the free piston stirling heat engine as heat pump that the people such as described free piston stirling heat pump 13 is Yu Guoyao propose.
Described free piston stirling heat engine comprises cylinder body, linear vibration motor 7, power piston 8 and the displacer 4 be located in described cylinder body, power piston 8 comprises cock body and falcon section, cock body is located in this cylinder body, falcon section inserts in the coil of linear vibration motor 7, power piston 8 is fixedly connected with the first planar support spring 9, the displacer hold-down support 12 at displacer 4 tops is fixedly connected with displacer 4 by the second planar support spring 11, cavity between displacer 4 and cylinder body one end forms compression chamber 6, cylinder body internally-powered piston 8 forms motor back of the body chamber 10 with the cavity of the cylinder body other end, cavity in cylinder body between displacer and power piston forms expansion chamber 1, power piston 8 vibration between motor back of the body chamber 10 and expansion chamber 1, the phase lag of displacer 4 is in the phase place of power piston 8, also be provided with heat absorbing end heat exchanger 2 and release end of heat heat exchanger 5 on inboard wall of cylinder block, heat absorbing end heat exchanger 2 is near power piston 8, release end of heat heat exchanger 5, away from power piston 8, is provided with regenerator 3 between heat absorbing end heat exchanger 2 and release end of heat heat exchanger 5.
On the connecting line be connected with heat absorbing end heat exchanger 2 at described air-source heat exchanger 15 delivery outlets, room temperature pump 16 is housed; On the connecting line of the input of described heating heat exchanger 20 and release end of heat heat exchanger 5, high-temperature pump 19 is housed.
Working medium in described temperature end heat-exchanging loop 18 is the liquid that conduction oil or boiling point are 100-200 ℃; Described heating heat exchanger 20 is arranged on heating water tank 23 bottoms or spiral surrounding in heating water tank 23.Blower fan 17 is equipped with in described air-source heat exchanger 15 outsides, to strengthen heat exchange.
Working medium in indoor temperature end loop pipe 14 (as water or alcohol etc.) is absorbed heat from air at air-source heat exchanger 15 places, transfers heat to the gas working medium in the heat absorbing end heat exchanger 2 of free-piston heat pump 13.Free-piston heat pump 13 utilizes the electric energy acting that heat is pumped to temperature end heat release heat exchanger 3 from indoor temperature end.Described temperature end heat-exchanging loop is comprised of temperature end loop pipe 18, high-temperature pump 9 and heating heat exchanger 20, working medium in temperature end loop pipe 18 (as the heat conduction wet goods) passes to the water in heating water tank 23 by the heat of the gas working medium in the release end of heat heat exchanger 5 of novel free-piston heat pump 13, to reach the purpose that makes the water heating, the boiling water after heating enters boiling water storage tank 29 for drinking.The boiling water insulation that 31 pairs of the Heat preservation silks arranged in storage tank do not use.
In the present embodiment, in boiler when work,, heater cistern water level meter 25 detects in heating water tank 23 lack of water and storage tank water inlet control valve 26 while closing, and water purifier water intaking valve 21 is opened, and the water of water inlet enters in heating water tank 23 after water purifier 22 is processed; Heater cistern water level meter 25 detect water when full water purifier water intaking valve 21 close, the free-piston heat pump starts energising work, the temperature at release end of heat heat exchanger 5 places of free piston stirling heat pump 13 is more than 100 ℃; When heater water tank temperature sensor 24 detects water temperature in heating water tank 23 and reaches 100 ℃, the free-piston heat pump quits work; Water storage tank water level meter 28 detect in boiling water storage tank 29 water less than, and water is arranged in heating water tank 23 and seethed with excitement, storage tank water inlet control valve 26 is opened, hot water flows into boiling water storage tank 29 from heating water tank 23; Water storage tank water level meter 28 water detected in boiling water storage tank 29 when full or in heating water tank 23 during lack of water, storage tank water inlet control valve 26 is closed; Then, in heating water tank 23, lack of water water purifier water intaking valve 21 is opened water inlet again, enters next Heating Cyclic, until in boiling water storage tank 29, water is full.When water storage tank water level meter 28 detects in boiling water storage tank 29 lack of water not and storage tank thermometer 27 and water temperature detected lower than 95 ℃ (can leaving water temperature adjustment) as required, Heat preservation silk 31 starts energising work to guarantee the water temperature in the boiling water storage tank; When water storage tank water level meter 28 detects lack of water in boiling water storage tank 29 or storage tank thermometer 27 and water temperature detected and reach 99 ℃ (leaving water temperature adjustment that can be as required, for avoiding producing " thousand boiling water " this Temperature Setting below 100 ℃), Heat preservation silk 31 quits work; The water of opening the 30 delivery ports outflows of storage tank outlet valve is drinkable boiling water.
Be provided with two water tanks of heating water tank and boiling water storage tank in this boiler system cold water and hot water are separated, can effectively avoid " water " to produce; Can effectively avoid the generation of " thousand boiling water " by the accurate control to the Heat preservation temperature; In addition, heating water tank volumetric ratio storage tank volume is much smaller, can shorten the stand-by period after boiling water is finished, and the continuous effluent amount is greater than boiling water storage tank volume.
Finally it should be noted that: above embodiment only, in order to technical scheme of the present invention to be described, is not intended to limit; Although with reference to previous embodiment, the present invention is had been described in detail, those of ordinary skill in the art is to be understood that: its technical scheme that still can put down in writing aforementioned each embodiment is modified, or part technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the spirit and scope of various embodiments of the present invention technical scheme.

Claims (8)

1. a free-piston electric heating pump boiler system, it is controlled treatment system (32) by free piston stirling heat pump and boiling water and forms; It is characterized in that, described boiling water control treatment system (32) comprise the water purifier (22) that is communicated with successively, heating water tank (23) and in establish the boiling water storage tank (29) of Heat preservation silk (31); Be respectively arranged with temperature sensor and water-level gauge in described heating water tank (23) and boiling water storage tank (29);
Described free piston stirling heat pump comprises the indoor temperature end heat-exchanging loop (14) that air-source heat exchanger (15) is housed on temperature end heat-exchanging loop (18) that heating heat exchanger (20) is housed on free piston stirling heat pump (13), loop and loop;
Described temperature end heat-exchanging loop (18) is connected in the release end of heat heat exchanger (5) of described free piston stirling heat pump (13), and the heating water tank (23) that described temperature end heat-exchanging loop (18) is controlled treatment system (32) by heating heat exchanger (20) with boiling water is connected; Described indoor temperature end heat-exchanging loop (14) is connected in the heat absorbing end heat exchanger (2) of described free piston stirling heat pump (13); And
Be loaded on water purifier water intaking valve (21) on water purifier (22) water inlet pipeline, be loaded on the storage tank water inlet control valve (26) on connecting line between heating water tank delivery port and storage tank water inlet; With the storage tank outlet valve (30) that is loaded on boiling water storage tank (29) bottom delivery port;
Described heating water tank (23) volume is less than boiling water storage tank (29) volume.
2. free-piston electric heating pump boiler system according to claim 1, is characterized in that, described free piston stirling heat pump (13) is the free piston stirling heat engine, and its working medium is helium or nitrogen.
3. free-piston electric heating pump boiler system according to claim 2, it is characterized in that, described free piston stirling heat engine comprises cylinder body, linear vibration motor (7), power piston (8) and be located at the displacer (4) in described cylinder body, power piston (8) comprises cock body and falcon section, cock body is located in this cylinder body, falcon section inserts in the coil of linear vibration motor (7), power piston (8) is fixedly connected with the first planar support spring (9), the displacer hold-down support (12) at displacer (4) top is fixedly connected with displacer (4) by the second planar support spring (11), cavity between displacer (4) and cylinder body one end forms compression chamber (6), cylinder body internally-powered piston (8) forms motor back of the body chamber (10) with the cavity of the cylinder body other end, cavity in cylinder body between displacer and power piston forms expansion chamber (1), power piston (8) vibration between motor back of the body chamber (10) and expansion chamber (1), the phase lag of displacer (4) is in the phase place of power piston (8), also be provided with heat absorbing end heat exchanger (2) and release end of heat heat exchanger (5) on inboard wall of cylinder block, heat absorbing end heat exchanger (2) is near power piston (8), release end of heat heat exchanger (5), away from power piston (8), is provided with regenerator (3) between heat absorbing end heat exchanger (2) and release end of heat heat exchanger (5).
4. free-piston electric heating pump boiler system according to claim 3, is characterized in that, on the connecting line be connected with heat absorbing end heat exchanger (2) at described air-source heat exchanger (15) delivery outlet, room temperature pump (16) is housed; On the connecting line of the input of described heating heat exchanger (20) and release end of heat heat exchanger (5), high-temperature pump (19) is housed.
5. free-piston electric heating pump boiler system according to claim 1, is characterized in that, the liquid that the working medium in described temperature end heat-exchanging loop (18) is conduction oil or boiling point 100-200 ℃;
6. according to the described free-piston electric heating pump of claim 1 or 4 boiler system, it is characterized in that, described heating heat exchanger (20) is arranged on heating water tank (23) bottom or spiral surrounding in heating water tank (23).
7. according to the described free-piston electric heating pump of claim 1 or 4 boiler system, it is characterized in that, blower fan (17) is equipped with in described air-source heat exchanger (15) outside.
8. free-piston electric heating pump boiler system according to claim 1, is characterized in that, the volume of described boiling water storage tank (29) is the 20-200 liter, and heating water tank (23) volume is the 2-5 liter.
CN201310412568XA 2013-09-11 2013-09-11 Free piston electric heat pump water boiler system Pending CN103471244A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104090600A (en) * 2014-06-18 2014-10-08 华南理工大学 Mechanical temperature control device based on heat pipes
CN104566961A (en) * 2014-11-26 2015-04-29 江门市凯立信电气科技有限公司 Heat-pump water heater capable of keeping water temperature constant
CN106618190A (en) * 2015-10-29 2017-05-10 广西大学 Indoor solar-energy water dispenser
CN107687718A (en) * 2017-08-09 2018-02-13 中国科学院理化技术研究所 A kind of multi-stage stirling refrigeration machine

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Publication number Priority date Publication date Assignee Title
CN201074908Y (en) * 2007-06-27 2008-06-18 王全龄 Heat pump type boiled water and cold water drinking machine
CN201532003U (en) * 2009-11-12 2010-07-21 常熟市海晟电器有限公司 Heat pump type electric water boiler with purification and sterilization functions
CN201917071U (en) * 2011-01-13 2011-08-03 中国水电顾问集团昆明勘测设计研究院 Energy-saving type air energy water boiler
CN102997417A (en) * 2012-11-18 2013-03-27 孔令斌 Stirling heat pump water heater
CN103089480A (en) * 2013-01-18 2013-05-08 中科力函(深圳)热声技术有限公司 Free piston stirling heat engine
CN203501456U (en) * 2013-09-11 2014-03-26 中国科学院理化技术研究所 Water boiler system with free piston electric heat pump

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201074908Y (en) * 2007-06-27 2008-06-18 王全龄 Heat pump type boiled water and cold water drinking machine
CN201532003U (en) * 2009-11-12 2010-07-21 常熟市海晟电器有限公司 Heat pump type electric water boiler with purification and sterilization functions
CN201917071U (en) * 2011-01-13 2011-08-03 中国水电顾问集团昆明勘测设计研究院 Energy-saving type air energy water boiler
CN102997417A (en) * 2012-11-18 2013-03-27 孔令斌 Stirling heat pump water heater
CN103089480A (en) * 2013-01-18 2013-05-08 中科力函(深圳)热声技术有限公司 Free piston stirling heat engine
CN203501456U (en) * 2013-09-11 2014-03-26 中国科学院理化技术研究所 Water boiler system with free piston electric heat pump

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104090600A (en) * 2014-06-18 2014-10-08 华南理工大学 Mechanical temperature control device based on heat pipes
CN104566961A (en) * 2014-11-26 2015-04-29 江门市凯立信电气科技有限公司 Heat-pump water heater capable of keeping water temperature constant
CN106618190A (en) * 2015-10-29 2017-05-10 广西大学 Indoor solar-energy water dispenser
CN107687718A (en) * 2017-08-09 2018-02-13 中国科学院理化技术研究所 A kind of multi-stage stirling refrigeration machine
CN107687718B (en) * 2017-08-09 2019-11-12 中国科学院理化技术研究所 A kind of multi-stage stirling refrigeration machine

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Application publication date: 20131225