CN105716329A - Direct-expansion type solar heat pump system - Google Patents
Direct-expansion type solar heat pump system Download PDFInfo
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- CN105716329A CN105716329A CN201511014570.7A CN201511014570A CN105716329A CN 105716329 A CN105716329 A CN 105716329A CN 201511014570 A CN201511014570 A CN 201511014570A CN 105716329 A CN105716329 A CN 105716329A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B30/00—Heat pumps
- F25B30/06—Heat pumps characterised by the source of low potential heat
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S60/00—Arrangements for storing heat collected by solar heat collectors
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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
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/20—Solar thermal
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/40—Solar thermal energy, e.g. solar towers
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- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Abstract
The invention belongs to the technical field of energy heating and air conditioning and particularly relates to a direct-expansion type solar heat pump system. The direct-expansion type solar heat pump system can collect solar energy and store energy by means of a phase change material and is used for heating, domestic hot water and air conditioner refrigerating. The direct-expansion type solar heat pump system comprises a solar collector/heat accumulator/evaporator, two three-way valves, a gas-liquid separator, a four-way reversing valve, a compressor, a condensation heat exchanger, four one-way valves, an electronic expansion valve, a liquid storage device, a drying filter and an auxiliary evaporator. The direct-expansion type solar heat pump system integrates heat collection, heating and heat storage, reduces intermediate heat exchange, increases the utilization rate of heat, reduces occupied area of equipment and reduces cost. The system can be used for heating and domestic water and can achieve the room refrigerating function in summer; heat storage achieved through the phase change material can prevent the situations that inlet pressure of the compressor is excessively large and the compressor is damaged. By means of the system, when solar energy intensity is weak and at nigh, energy is stored and released by the phase change material in a solar energy collection and storage device 1, and accordingly energy can be continuously used.
Description
Technical field
The invention belongs to energy class heat supply and air-conditioning technical field, be specifically related to one and can collect solar energy and utilize phase-change material to carry out accumulation of energy, be subsequently used for the direct expanding solar heating pump system of heating, domestic hot-water and air conditioner refrigerating.
Background technology
The basis that the energy is depended on for existence in life people, is national indispensable important component part.And due to the extensive exploitation of mineral resources so that the minimizing that the storage of the energy is very big, nowadays the energy utilize in short supply, the development and utilization of the energy is increasingly subject to people's attention.China is in utilization of energy big country, and regenerative resource, clean energy resource and alternative energy source are badly in need of development and application.Solar energy cleans green energy resource as one, and its feature of environmental protection, persistence, the advantage such as rich are subject to the favor of people.
The utilization of solar energy is organically combined by direct expanding solar heating pump system with heat pump techniques, improves the utilization rate of solar energy, environmental protection and energy saving.But direct expanding solar heating pump poor stability, is subject to the factor impact of season, weather, round the clock environment.Patent " a kind of directly-expanding solar heat-pump air conditioner system " (CN103499163), describe a kind of solar energy heat pump system with phase-changing energy-storing, solar energy and phase-transition heat-storage are organically combined, improves the stability problem of direct-expansion type solar energy, but its system structure relative complex.Patent " directly-expanding solar heat-pump air conditioner and hot-water heating system " (CN1515850A), combines solar heat pump and ice-storage air-conditioning, greatly improves collector efficiency and hot pump performance, but it does not account for the environmental change impact on it.
Summary of the invention
It is an object of the invention to provide a kind of new direct expanding solar heating pump system, to improve the stability problem of existing direct expanding solar heating pump system, reduce the environmental factors impact on it, simultaneously the structure of simplified system.
The technical solution adopted in the present invention:
A kind of direct expanding solar heating pump system, by solar energy heating/accumulation of heat/vaporizer, two three-way valves, gas-liquid separator, four-way change-over valve, compressor, condensing heat exchanger, four one-way cocks, electric expansion valve, reservoir, device for drying and filtering, heat storage water tank and auxiliary evaporator composition；
Wherein, described solar energy heating/accumulation of heat/vaporizer includes grooved housing and the fluid pipeline of transverse slot shell body, and the notch place of described grooved housing is provided with safety glass makes grooved housing cavity form confined space；Described grooved enclosure interior is provided with heat absorption copper pipe and heat absorption flat plate, described heat absorption copper pipe is U-shaped, two mouth of pipe is all through grooved housing sidewall to grooved hull outside, described heat absorption flat plate is connected on the upper tube wall of heat absorption copper pipe, described grooved enclosure interior is also filled with phase-change material, described heat absorption flat plate level covers phase-change material upper epidermis, and described fluid pipeline is arranged in phase-change material；
Described four check valves, one check valve group of composition, described check valve group has tetra-interfaces of a, b, c, d, and the interface b of described check valve group passes sequentially through reservoir, device for drying and filtering and electric expansion valve and is connected with the interface d of check valve group；
The interface a of described four-way change-over valve is connected with suction port of compressor by gas-liquid separator, the outlet of compressor is connected with the interface b of four-way change-over valve, the interface c of four-way change-over valve is connected with a mouth of condensing heat exchanger, the b mouth of condensing heat exchanger is connected with the interface a of check valve group, the interface c of check valve group is connected with the upper pipe mouth of pipe of vaporizer interface and heat absorption copper pipe respectively by three-way valve a, and the lower pipe mouth of pipe of another interface of vaporizer and heat absorption copper pipe is all connected on the interface d of four-way check valve by three-way valve b；The outlet of fluid pipeline of described solar energy heating/accumulation of heat/vaporizer and the d mouth of condensing heat exchanger are all connected on the water inlet of heat storage water tank, the c mouth of described condensing heat exchanger is water inlet, being provided with the outlet being connected with domestic water line on described heat storage water tank, the d mouth of described condensing heat exchanger is also connected with room conditioning.
Described grooved enclosure interior is additionally provided with fin, and described fin is arranged in phase-change material and is connected with heat absorption copper pipe and fluid pipeline is connected simultaneously.
Described fin is simultaneously connected with the top tube and down tube of heat absorption copper pipe, and described fluid pipeline is between the top tube and down tube of heat absorption copper pipe and passes fin.
Described heat absorption copper pipe presents pipe and lower pipe level, and the form of the upper pipe surface that is positioned at lower pipe is fixedly installed on grooved housing.
At least two heat absorption copper pipe it is provided with in described grooved housing, described grooved housing be outside equipped with one enter liquid lump pipe and one go out liquid lump pipe, the upper pipe mouth of pipe of described heat absorption copper pipe and the lower pipe mouth of pipe are all connected to liquid lump pipe and go out on liquid lump pipe, described enter liquid lump pipe the mouth of pipe be connected with three-way valve a, go out liquid lump pipe and be connected with three-way valve b.
Described grooved inner walls is additionally provided with heat-insulation layer.
The d of the outlet of the fluid pipeline of described solar energy heating/accumulation of heat/vaporizer and heat storage water tank, condensing heat exchanger exports and is all provided with stop valve between heat storage water tank, and the outlet of described heat storage water tank is also equipped with stop valve.
Described condensing heat exchanger adopts shell-tube type condensing heat exchanger.
Described four check valves have two kinds of flow directions.One: cold-producing medium by a mouth to b mouth, through reservoir 9, device for drying and filtering 10, electric expansion valve 8 to d mouth, then by d mouth to c mouth.Its two: by c mouth to b mouth, through reservoir 9, device for drying and filtering 10, electric expansion valve 8 to d mouth, then by d mouth to a mouth.
Beneficial effects of the present invention:
(1) present invention can utilize the heat of storing of phase-change material in solar energy heating/thermal storage device to realize the continuous use of its energy during and night more weak in solar energy intensity, it is effectively increased the stability of existing direct expanding solar heating pump system, reduces the environmental factors impact on it；
(2) in the present invention, heat absorption flat plate adopts aluminum heat absorption flat plate, and is coated with heat-sink shell on it, significantly improves absorption and the utilization rate of sunlight；Increase thermofin in the lower section of heat absorption copper pipe simultaneously, further enhance heat transfer effect；
(3) present invention adopts the accumulation of heat of phase-change material to be possible to prevent the inlet pressure of compressor excessive, damages compressor, reduces the probability that therefore compressor breaks down.
(4) present invention can be used for heating and domestic water, and summer can realize the refrigerating function in room.
(5) thermal-arrest of the present invention, heating and accumulation of heat are in one, and intermediate heat transfer is few, and heat utilization ratio improves, and the floor space of equipment reduces, and cost reduces.
(6) in the present invention, condensing heat exchanger and solar thermal collector/accumulation of heat/vaporizer are compiled in heat storage water tank 21, it is achieved the centralized collection of hot water and the efficient utilization of solar energy.
Accompanying drawing explanation
Fig. 1 is the structure chart of direct expanding solar heating pump system of the present invention.
The general assembly drawing of Fig. 2 position solar energy heating/accumulation of heat/vaporizer.
Fig. 3 is the main pseudosection of solar energy heating/accumulation of heat/vaporizer.
Fig. 4 is the side cutaway view of solar energy heating/accumulation of heat/vaporizer.
Fig. 5 is solar energy heating/accumulation of heat/vaporizer inner tube structure chart.
Detailed description of the invention
As shown in Fig. 1,2,3,4,5, a kind of direct expanding solar heating pump system, by solar energy heating/accumulation of heat/vaporizer 1, two three-way valves 2, gas-liquid separator 3, four-way change-over valve 4, compressor 5, condensing heat exchanger 6, four one-way cocks 7, electric expansion valve 8, reservoir 9, device for drying and filtering 10, heat storage water tank 21 and auxiliary evaporator 11 form；Solar energy heating/accumulation of heat/vaporizer 1 includes grooved housing 13 and the fluid pipeline 22 of transverse slot shell body, and the notch place of grooved housing 13 is provided with safety glass 12 makes grooved housing cavity form confined space；Grooved enclosure interior is provided with heat absorption copper pipe 17 and heat absorption flat plate 18, heat absorption copper pipe is U-shaped, two mouth of pipe is all through grooved housing sidewall to grooved hull outside, heat absorption flat plate is aluminum flat board, can also applying one layer of absorber coatings on it, be connected on the upper tube wall of heat absorption copper pipe, grooved enclosure interior is also filled with phase-change material 15, described heat absorption flat plate level covers phase-change material upper epidermis, and described fluid pipeline is arranged in phase-change material；Four check valve one check valve groups of composition, described check valve group has tetra-interfaces of a, b, c, d, and the interface b of described check valve group passes sequentially through reservoir, device for drying and filtering and electric expansion valve and is connected with the interface d of check valve group；The interface a of four-way change-over valve is connected with suction port of compressor by gas-liquid separator, the outlet of compressor is connected with the interface b of four-way change-over valve, the interface c of four-way change-over valve is connected with a mouth of condensing heat exchanger, the b mouth of condensing heat exchanger is connected with the interface a of check valve group, the interface c of check valve group is connected with the upper pipe mouth of pipe of vaporizer interface and heat absorption copper pipe respectively by three-way valve a, and the lower pipe mouth of pipe of another interface of vaporizer and heat absorption copper pipe is all connected on the interface d of four-way check valve by three-way valve b；The outlet of fluid pipeline of described solar energy heating/accumulation of heat/vaporizer and the d mouth of condensing heat exchanger are all connected on the water inlet of heat storage water tank, the c mouth of described condensing heat exchanger is water inlet, being provided with the outlet being connected with domestic water line on described heat storage water tank, the d mouth of described condensing heat exchanger is also connected with room conditioning.
Further, grooved enclosure interior is also equipped with fin 16, and fin 16 is arranged in phase-change material and is connected with heat absorption copper pipe and fluid pipeline is connected simultaneously；Preferably, fin is simultaneously connected with the top tube and down tube of heat absorption copper pipe, and fluid pipeline is between the top tube and down tube of heat absorption copper pipe and passes fin.
Further, heat absorption copper pipe presents pipe and lower pipe level, and the form of the upper pipe surface that is positioned at lower pipe is fixedly installed on grooved housing.
Further, at least two heat absorption copper pipe is installed in grooved housing, grooved housing be externally provided with one enter liquid lump pipe and one go out liquid lump pipe, the upper pipe mouth of pipe and the lower pipe mouth of pipe of heat absorption copper pipe are all connected to liquid lump pipe and go out on liquid lump pipe, the mouth of pipe entering liquid lump pipe is connected with three-way valve a, goes out liquid lump pipe and is connected with three-way valve b.
Further, grooved inner walls is additionally provided with heat-insulation layer.
Further, the outlet of the fluid pipeline of solar energy heating/accumulation of heat/vaporizer and heat storage water tank, condensing heat exchanger d outlet and heat storage water tank between be all provided with stop valve, the outlet of described heat storage water tank is also equipped with stop valve.
Above-mentioned condensing heat exchanger adopts shell-tube type condensing heat exchanger.
Aforementioned four check valve has two kinds of flow directions.One: cold-producing medium by a mouth to b mouth, through reservoir 9, device for drying and filtering 10, electric expansion valve 8 to d mouth, then by d mouth to c mouth.Its two: by c mouth to b mouth, through reservoir 9, device for drying and filtering 10, electric expansion valve 8 to d mouth, then by d mouth to a mouth.
In the present invention, solar energy heating/accumulation of heat/vaporizer 1 is made up of phase-change material and solar thermal collector, is solar energy and the coupling of phase-change material.When the heat of solar thermal collector is too high, the phase-change material transformation by states of matter, store too high heat.The energy of its storage can be utilized when night or sun strength reduction, improve the stability of direct expanding solar heating pump system.Solar energy heating/accumulation of heat/vaporizer 1 has coupled solar energy heating and accumulation of heat, and the structure making system is compacter, improves the operational efficiency of system.And when the temperature of evaporator outlet, hypertonia, the performance of compressor is produced impact, also compressor can be had infringement.So described solar energy heating/accumulation of heat/vaporizer 1 is by changing the phase-change material using different warm areas, it is possible to well control the temperature and pressure of suction port of compressor, compressor is acted as protective effect.The present invention is one auxiliary evaporator in solar energy heating/accumulation of energy/vaporizer 1 parallel connection, can realize heating in winter by four-way change-over valve 4 and three-way valve 2, it is provided that domestic hot-water, and summer can meet refrigeration demand.
Practical way of the present invention:
(1) during winter operation: heat heating+domestic hot-water's pattern processed
As it is shown in figure 1, carry out heat exchange from compressor 5 high-temperature high-pressure refrigerant out through condensing heat exchanger 6 and water system, valve 24 is closed, and valve 25 is opened, and this part hot water is for indoor heating.Cold-producing medium flows through reservoir 9, Filter dryer 10 and electric expansion valve 8 through four check valves 7 after flowing out from condensing heat exchanger 6.Controlled by two three-way valve 2, cold-producing medium is through solar energy heating/accumulation of heat/vaporizer 1, its outlet flows back to compressor through four-way change-over valve 4 and gas-liquid separator, tap water heats up through solar energy heating/accumulation of heat/vaporizer 1 becomes domestic hot-water, now valve 23 is opened, it is achieved the function of winter heating and offer domestic hot-water.
Heat collected by solar energy heating/accumulation of heat/vaporizer 1, and (1), when accumulation of heat on daytime is enough to provide evening for warm domestic hot-water, utilizes the heat that phase-change material stores to provide.(2) when accumulation of heat on daytime is not enough to provide domestic hot-water needed for night, employing source pump is opened, valve 25 is closed, valve 24 is opened, utilize auxiliary evaporator 11 to be connected in parallel on solar energy heating/accumulation of heat/vaporizer 1 side to operate with solar thermal collector 1 simultaneously, to meet people's demand, it is ensured that the stability of direct-expansion type solar energy and avoid compressor 5 is adversely affected.
(2) during summer operation, refrigeration+domestic hot-water's pattern processed
The cold-producing medium of High Temperature High Pressure is flowed out through four-way change-over valve 4 to three-way valve 2 by compressor 5, cold-producing medium is controlled through auxiliary evaporator 11 (this operating mode is made condenser/evaporator and used) by three-way valve 2, its outlet enters condensing heat exchanger 6 (this operating mode is made vaporizer and used) through four check valves 7, reservoir 9, exsiccator 10 and electric expansion valve 8, carry out cold-storage, heat exchange is carried out with water system, meet space cooling load requirement, it is achieved cooling in summer.When the sun intensity on daytime is higher, solar energy heating/accumulation of heat/vaporizer 1 can become domestic water to tap water heating.When night or overcast and rainy time, auxiliary evaporator 11 does not enable, from compressor 5 cold-producing medium out through four-way change-over valve 4 to three-way valve 2, cold-producing medium is controlled through solar energy heating/accumulation of heat/vaporizer 1 and phase-change material heat exchange by three-way valve 2, the heating domestic hot water that the heat that phase-change material stores can continue, meets the purpose of domestic hot-water processed and refrigeration simultaneously.
(3) when transition season runs, domestic hot-water's pattern processed
Without freezing and heating in transition season, only run solar energy heating/accumulation of heat/vaporizer 1, by cold water through solar energy heating/accumulation of heat/vaporizer 1, flow through stop valve 23 and store to storage tank 21, for the use of user domestic hot-water.
Claims (6)
1. a direct expanding solar heating pump system, it is characterized in that: this system is by solar energy heating/accumulation of heat/vaporizer, two three-way valves, gas-liquid separator, four-way change-over valve, compressor, condensing heat exchanger, four one-way cocks, electric expansion valve, reservoir, device for drying and filtering, heat storage water tank and auxiliary evaporator composition；
Wherein, described solar energy heating/accumulation of heat/vaporizer includes grooved housing and the fluid pipeline of transverse slot shell body, and the notch place of described grooved housing is provided with safety glass makes grooved housing cavity form confined space；Described grooved enclosure interior is provided with heat absorption copper pipe and heat absorption flat plate, described heat absorption copper pipe is U-shaped, two mouth of pipe is all through grooved housing sidewall to grooved hull outside, described heat absorption flat plate is connected on the upper tube wall of heat absorption copper pipe, described grooved enclosure interior is also filled with phase-change material, described heat absorption flat plate level covers phase-change material upper epidermis, and described fluid pipeline is arranged in phase-change material；
Described four check valves, one check valve group of composition, described check valve group has tetra-interfaces of a, b, c, d, and the interface b of described check valve group passes sequentially through reservoir, device for drying and filtering and electric expansion valve and is connected with the interface d of check valve group；
The interface a of described four-way change-over valve is connected with suction port of compressor by gas-liquid separator, the outlet of compressor 5 is connected with the interface b of four-way change-over valve, the interface c of four-way change-over valve is connected with a mouth of condensing heat exchanger, the b mouth of condensing heat exchanger is connected with the interface a of check valve group, the interface c of check valve group is connected with the upper pipe mouth of pipe of vaporizer interface and heat absorption copper pipe respectively by three-way valve a, and the lower pipe mouth of pipe of another interface of vaporizer and heat absorption copper pipe is all connected on the interface d of four-way check valve by three-way valve b；The outlet of fluid pipeline of described solar energy heating/accumulation of heat/vaporizer and the d mouth of condensing heat exchanger are all connected on the water inlet of heat storage water tank, the c mouth of described condensing heat exchanger is water inlet, being provided with the outlet being connected with domestic water line on described heat storage water tank, the d mouth of described condensing heat exchanger is also connected with room conditioning.
2. direct expanding solar heating pump system according to claim 1, it is characterised in that: described grooved enclosure interior is additionally provided with fin, and described fin is arranged in phase-change material and is connected with heat absorption copper pipe and fluid pipeline is connected simultaneously.
3. direct expanding solar heating pump system according to claim 2, it is characterised in that: described fin is simultaneously connected with the top tube and down tube of heat absorption copper pipe, and described fluid pipeline is between the top tube and down tube of heat absorption copper pipe and passes fin.
4. direct expanding solar heating pump system according to claim 1, it is characterised in that: described heat absorption copper pipe presents pipe and lower pipe level, and the form of the upper pipe surface that is positioned at lower pipe is fixedly installed on grooved housing.
5. the direct expanding solar heating pump system according to claim 1 or 4, it is characterized in that: in described grooved housing, be provided with at least two heat absorption copper pipe, described grooved housing be outside equipped with one enter liquid lump pipe and one go out liquid lump pipe, the upper pipe mouth of pipe of described heat absorption copper pipe and the lower pipe mouth of pipe are all connected to liquid lump pipe and go out on liquid lump pipe, described enter liquid lump pipe the mouth of pipe be connected with three-way valve a, go out liquid lump pipe and be connected with three-way valve b.
6. direct expanding solar heating pump system according to claim 1, it is characterised in that: described grooved inner walls is additionally provided with heat-insulation layer.
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| CN201511014570.7A CN105716329B (en) | 2015-12-31 | 2015-12-31 | Direct expanding solar heating pump system |
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| CN201511014570.7A CN105716329B (en) | 2015-12-31 | 2015-12-31 | Direct expanding solar heating pump system |
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| CN105716329A true CN105716329A (en) | 2016-06-29 |
| CN105716329B CN105716329B (en) | 2018-05-08 |
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| CN107014112A (en) * | 2017-05-23 | 2017-08-04 | 翟滨滨 | A kind of full cumulative heating |
| CN107014111A (en) * | 2017-05-22 | 2017-08-04 | 天津城建大学 | A kind of phase-transition heat-storage solar air source double heat source heat pump hot water electricity generation system |
| CN108224799A (en) * | 2018-02-12 | 2018-06-29 | 宁夏银晨太阳能科技有限公司 | A kind of flat panel solar heat collecting evaporator |
| CN108286832A (en) * | 2018-03-23 | 2018-07-17 | 烟台开发区蓝鲸金属修复有限公司 | A kind of solar heat-exchange device and preparation method thereof |
| CN110469894A (en) * | 2019-08-21 | 2019-11-19 | 深圳市辉宏技术有限公司 | A kind of solar energy and the cold and hot balance system of water source double source |
| CN111156698A (en) * | 2020-01-08 | 2020-05-15 | 北京建筑大学 | Cold storage type instant heating heat pump water heater |
| CN113091330A (en) * | 2021-04-14 | 2021-07-09 | 广东工业大学 | Phase change heat storage device based on solar energy |
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| CN110469894A (en) * | 2019-08-21 | 2019-11-19 | 深圳市辉宏技术有限公司 | A kind of solar energy and the cold and hot balance system of water source double source |
| CN111156698A (en) * | 2020-01-08 | 2020-05-15 | 北京建筑大学 | Cold storage type instant heating heat pump water heater |
| US11927366B2 (en) | 2020-01-08 | 2024-03-12 | Beijing University Of Civil Engineering And Architecture | Cold-storage instantaneous heat pump water heater |
| CN113091330A (en) * | 2021-04-14 | 2021-07-09 | 广东工业大学 | Phase change heat storage device based on solar energy |
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| CN105716329B (en) | 2018-05-08 |
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