CN111306841A - Solar air source heat pump triple supply system and use method - Google Patents
Solar air source heat pump triple supply system and use method Download PDFInfo
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- CN111306841A CN111306841A CN202010221321.XA CN202010221321A CN111306841A CN 111306841 A CN111306841 A CN 111306841A CN 202010221321 A CN202010221321 A CN 202010221321A CN 111306841 A CN111306841 A CN 111306841A
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- 238000000034 method Methods 0.000 title claims abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 288
- 238000010438 heat treatment Methods 0.000 claims abstract description 57
- 238000001035 drying Methods 0.000 claims abstract description 14
- 238000001816 cooling Methods 0.000 claims abstract description 8
- 206010015856 Extrasystoles Diseases 0.000 claims abstract 2
- 239000003507 refrigerant Substances 0.000 claims description 37
- 238000005057 refrigeration Methods 0.000 claims description 17
- 238000010257 thawing Methods 0.000 claims description 16
- 239000008236 heating water Substances 0.000 claims description 11
- 239000007788 liquid Substances 0.000 claims description 9
- 239000008399 tap water Substances 0.000 claims description 3
- 235000020679 tap water Nutrition 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims 1
- 238000011084 recovery Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
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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
- F25B29/00—Combined heating and refrigeration systems, e.g. operating alternately or simultaneously
- F25B29/003—Combined heating and refrigeration systems, e.g. operating alternately or simultaneously of the compression type system
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
- F24H1/18—Water-storage heaters
- F24H1/20—Water-storage heaters with immersed heating elements, e.g. electric elements or furnace tubes
- F24H1/201—Water-storage heaters with immersed heating elements, e.g. electric elements or furnace tubes using electric energy supply
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/18—Arrangement or mounting of grates or heating means
- F24H9/1809—Arrangement or mounting of grates or heating means for water heaters
- F24H9/1818—Arrangement or mounting of electric heating means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/20—Arrangement or mounting of control or safety devices
- F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
- F24H9/2014—Arrangement or mounting of control or safety devices for water heaters using electrical energy supply
- F24H9/2021—Storage heaters
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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
- F25B13/00—Compression machines, plants or systems, with reversible cycle
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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
- F25B27/00—Machines, plants or systems, using particular sources of energy
- F25B27/002—Machines, plants or systems, using particular sources of energy using solar energy
- F25B27/005—Machines, plants or systems, using particular sources of energy using solar energy in compression type systems
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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
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
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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
- F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
- F25B47/02—Defrosting cycles
- F25B47/022—Defrosting cycles hot gas defrosting
- F25B47/025—Defrosting cycles hot gas defrosting by reversing the cycle
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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
- F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
- F25B2313/027—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means
- F25B2313/02741—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means using one four-way valve
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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
- F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
- F25B2400/19—Pumping down refrigerant from one part of the cycle to another part of the cycle, e.g. when the cycle is changed from cooling to heating, or before a defrost cycle is started
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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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/27—Relating to heating, ventilation or air conditioning [HVAC] technologies
- Y02A30/272—Solar heating or cooling
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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
Abstract
The invention provides a solar air source heat pump triple co-generation system and a using method thereof, belonging to the technical field of solar air source heat pumps. The problem of current solar energy air source heat pump trigeminy supply system too complicated, energy utilization is low is solved. The solar energy heat pump comprises an air source heat pump mechanism, a solar heat collection mechanism, a first heat exchanger and a second heat exchanger, wherein the air source heat pump mechanism comprises a compressor, a four-way reversing valve, an indoor unit air cooling heat exchanger, a drying pipe, a throttling device and an outdoor unit air cooling heat exchanger, the solar heat collection mechanism comprises a low-temperature water tank, a first valve, a high-temperature constant-temperature water tank, a solar heat collection plate, a second valve, a third water pump and a fourth water pump, the low-temperature water tank is connected with an inner cavity of the first heat exchanger through the second water pump, and the high-temperature constant-temperature water tank is connected with an inner cavity of the second. The combined heat pump is mainly used for realizing heating, cooling and domestic hot water combined supply.
Description
Technical Field
The invention belongs to the technical field of solar air source heat pumps, and particularly relates to a solar air source heat pump triple co-generation system and a using method thereof.
Background
At present, technologies of combining a solar water heating system and an air source heat pump are appeared in succession, the two are supported by governments and related departments as renewable clean energy, and the combination of solar energy and an air source heat pump for heating and air conditioning is also one of the current research hotspots. However, the existing system has the following technical problems in practical application:
1. in an environment with low temperature and high relative humidity of outdoor air, an outdoor unit of the air source heat pump mechanism is easy to frost; especially when the air source heat pump outdoor unit is applied in severe cold areas, the problem of frost prevention or defrosting of the outdoor unit of the air source heat pump mechanism is more troublesome, and the performance of the unit is seriously influenced. The existing solar air source heat pump triple co-generation system has the following two characteristics: firstly, the problem of defrosting of the outdoor unit in winter is not considered; secondly, the defrosting purpose is achieved by increasing the temperature of the refrigerant through the solar heat collector, the system investment cost is increased, and the system operation stability is reduced due to the additionally arranged accessories such as the electromagnetic valve and the like.
2. The problems of unscientific and unreasonable heat collection form design, low comprehensive energy efficiency of a system and low energy utilization rate exist in the prior art. The common solar energy air source heat pump triple co-generation system does not consider condensation heat recovery, thereby not only causing heat waste, but also causing urban heat pollution.
3. The existing system mostly adopts a single water tank structure, and cannot realize the functions of simultaneously taking heat from the water tank for heating and supplying constant-temperature hot water in winter; that is, a conventional single water tank system is adopted, and if the air source heat pump mechanism continuously takes heat therefrom, it is difficult to realize a function of providing constant temperature hot water for a user, and further, the operating efficiency of the system cannot be improved.
In conclusion, the existing solar energy-air source heat pump triple co-generation system has the problems of too complex system, low energy utilization rate and the like, the operation reliability is very limited, and the inherent defects are the biggest bottleneck of popularization and application of the systems.
Disclosure of Invention
The invention provides a solar air source heat pump triple co-generation system and a using method thereof, aiming at solving the problems in the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme: a solar energy air source heat pump triple co-generation system comprises an air source heat pump mechanism, a solar energy heat collection mechanism, a first heat exchanger and a second heat exchanger, wherein the air source heat pump mechanism comprises a compressor, a four-way reversing valve, an indoor unit air-cooled heat exchanger, a drying pipe, a throttling device and an outdoor unit air-cooled heat exchanger, four interfaces of the four-way reversing valve are respectively connected with an outlet of the compressor, an inlet of the compressor, an outer cavity of the second heat exchanger and the indoor unit air-cooled heat exchanger, the indoor unit air-cooled heat exchanger is sequentially connected with the drying pipe, the throttling device and the outdoor unit air-cooled heat exchanger, the outdoor unit air-cooled heat exchanger is connected with the outer cavity of the first heat exchanger, and the outer cavity; the solar energy heat collecting mechanism comprises a low-temperature water tank, a first valve, a high-temperature constant-temperature water tank, a solar energy heat collecting plate, a second valve, a third water pump and a fourth water pump, wherein the low-temperature water tank is connected with the high-temperature constant-temperature water tank through the first valve and the fourth water pump respectively, the solar energy heat collecting plate is connected with the second valve and the third water pump in sequence and then is connected with the high-temperature constant-temperature water tank, tap water is supplied to the inlet end of the low-temperature water tank, constant-temperature hot water is supplied to the outlet end of the high-temperature constant-temperature water tank, the inner cavity of the low-temperature water tank is connected with the inner cavity of the first heat.
Furthermore, an auxiliary electric heater is arranged in the high-temperature constant-temperature water tank.
Furthermore, a gas-liquid separator is arranged between the four-way reversing valve and the inlet of the compressor.
Furthermore, an electromagnetic valve is connected between the four-way reversing valve and the indoor unit air-cooled heat exchanger.
Furthermore, a check valve is connected between the low-temperature water tank and the high-temperature constant-temperature water tank.
Furthermore, a third valve is arranged at the outlet end of the high-temperature constant-temperature water tank.
Further, the first heat exchanger and the second heat exchanger are both double pipe heat exchangers.
Furthermore, the compressor is a variable frequency compressor, the first water pump, the second water pump, the third water pump and the fourth water pump are variable frequency water pumps, and the throttling device is a capillary tube.
The invention also provides a using method of the solar energy air source heat pump triple co-generation system, which comprises a single refrigeration mode, a refrigeration and hot water heating mode, a single heating mode, an air source heat pump and solar energy heat collection combined heating mode, a solar energy hot water heating mode and a defrosting mode;
when the single refrigeration mode operates, the first water pump and the second water pump are closed, the air source heat pump mechanism works independently, the refrigerant is compressed by the compressor, then flows through the four-way reversing valve, the second heat exchanger and the outer cavity of the first heat exchanger in sequence, releases heat through the outdoor unit air-cooled heat exchanger, is throttled by the throttling device, flows through the drying pipe, enters the indoor unit air-cooled heat exchanger for absorbing heat, then returns to the compressor through the four-way reversing valve and the gas-liquid separator, and is circulated to realize refrigeration;
when the refrigeration and hot water heating mode operates, a fan of the air-cooled heat exchanger of the outdoor unit is closed in an initial state, the flow direction of a refrigerant in the air source heat pump mechanism is the same as that of a single refrigeration mode, a second water pump is started, water in the high-temperature constant-temperature water tank flows through an inner cavity of the first heat exchanger to exchange heat with the refrigerant, heat in the air source heat pump mechanism is used for heating water in the high-temperature constant-temperature water tank, when the water in the high-temperature constant-temperature water tank reaches a set temperature, the second water pump is closed, the first water pump is started at the same time, the water in the low-temperature water tank flows through an inner cavity of the second heat exchanger to exchange heat with the refrigerant, the heat in the air source heat pump mechanism is used for heating the water in the low-temperature water tank, when the water in the low-temperature water tank reaches the set temperature;
when the single heating mode operates, the first water pump and the second water pump are closed, the air source heat pump mechanism works independently, the refrigerant is compressed by the compressor, flows through the four-way reversing valve, releases heat through the indoor unit air-cooled heat exchanger, is throttled by the throttling device after passing through the drying pipe, absorbs heat through the outdoor unit air-cooled heat exchanger, then sequentially passes through the outer cavities of the first heat exchanger and the second heat exchanger, and returns to the compressor through the four-way reversing valve and the gas-liquid separator, so that heating is realized in a circulating manner;
when the air source heat pump and solar heat collection combined heating mode operates, firstly, a first valve, a third water pump and a fourth water pump are started, water in a high-temperature constant-temperature water tank and water in a low-temperature water tank are heated by a solar heat collection plate, when the water in the high-temperature constant-temperature water tank reaches a set temperature, the first valve and the fourth water pump are closed, the first water pump is started at the same time, the flow direction of a refrigerant in the air source heat pump mechanism is the same as that of a single heating mode, the water in the low-temperature water tank enters an inner cavity of a second heat exchanger to exchange heat with the refrigerant, and the air source heat pump mechanism absorbs heat from the low-temperature water tank for heating, so that;
the solar water heating mode comprises two working conditions, wherein a first valve, a third water pump and a fourth water pump are started under the first working condition when the solar water heating mode runs, a high-temperature constant-temperature water tank and a low-temperature water tank form a series loop, and water in the high-temperature constant-temperature water tank and water in the low-temperature water tank are heated by a solar heat collecting plate; when the second working condition is in operation, only the third water pump is started, and the solar heat collecting plate is utilized to independently heat water in the high-temperature constant-temperature water tank;
when the defrosting mode operates, the flow direction of the refrigerant in the air source heat pump mechanism is the same as that of the single heating mode, the first water pump 11 and/or the second water pump 12 are/is started, water in the high-temperature constant-temperature water tank 17 and/or the low-temperature water tank 13 exchanges heat with the refrigerant in the air source heat pump mechanism, the temperature of the refrigerant is increased, the temperature of the refrigerant entering the air-cooled heat exchanger 8 of the outdoor unit is increased, and natural defrosting is achieved.
Furthermore, the use method of the solar air source heat pump triple co-generation system further comprises an auxiliary electric heater hot water mode, when the auxiliary electric heater operates in the auxiliary electric heater hot water mode, the auxiliary electric heater is started, the auxiliary electric heater is used for heating water in the high-temperature constant-temperature water tank, and when the water in the high-temperature constant-temperature water tank reaches a set temperature, the auxiliary electric heater is turned off.
Compared with the prior art, the invention has the beneficial effects that: the invention solves the problems of too complex and low energy utilization rate of the existing solar energy-air source heat pump triple co-generation system.
The invention realizes heating, cooling and domestic hot water triple supply by integrating the air source heat pump mechanism and the solar heat collecting mechanism, and has the following obvious advantages compared with the traditional triple supply system:
1. the system has high comprehensive energy efficiency and stable operation. On the premise of realizing the functions, the system has simple structure and fewer accessories such as valves and the like. The plate heat exchanger is adopted in the existing system, but the distance between two plates of the plate heat exchanger is too small, the fluid resistance is large, the blockage is easy, the double-pipe heat exchanger is adopted in the system, the operation effect is better undoubtedly, and the system is more stable.
2. The system has scientific and reasonable heat collection form design and high energy utilization rate. On one hand, the condensation heat recovery of the air conditioner of the system realizes waste heat utilization and reduces heat waste; on the other hand, the urban thermal pollution is also reduced to a certain extent.
3. The system adopts a double-water-tank structure, and realizes the functions of simultaneously heating from the middle-low-temperature water tank and supplying constant-temperature hot water from the high-temperature constant-temperature water tank in winter; compare in traditional single water tank system, this system can follow the low temperature water tank and get heat in succession, does not influence and provides the hot water function of constant temperature for the user, and then promotes the operating efficiency of system. When the temperature of the solar heating water in winter does not meet the requirement of domestic hot water, the prepared low-temperature hot water can be used as a heat source of the air source heat pump system, so that the service time of solar energy is prolonged.
4. Compared with defrosting modes such as adding accessories to the traditional system, the system improves the water flow flowing through the sleeve heat exchanger by controlling the variable frequency water pump, further improves the temperature of the refrigerant entering the variable frequency compressor through heat exchange, further improves the temperature of the refrigerant entering the outdoor air-cooled heat exchanger, achieves the purpose of natural defrosting, and effectively solves the problems of noise caused by reversing of the four-way valve, large indoor environment temperature fluctuation and the like in the conventional defrosting process.
The solar heat collecting mechanism can be used for preparing sufficient hot water in winter, and can also be used for storing redundant heat for heating on the premise of meeting the requirement of domestic hot water. In addition, when the temperature of the solar heating water in winter does not meet the requirement of domestic hot water, the prepared low-temperature hot water can be used as a heat source of the air source heat pump system. The system can realize the functions of simultaneously heating and supplying constant-temperature hot water in winter, overcomes the defects of the traditional system, and has simple structure, thereby effectively improving the energy utilization efficiency of the system and the reliability of the operation of the system.
Drawings
Fig. 1 is a schematic structural diagram of a solar air source heat pump triple co-generation system according to the present invention.
The system comprises a compressor, a 2-four-way reversing valve, a 3-gas-liquid separator, a 4-electromagnetic valve, a 5-indoor unit air-cooled heat exchanger, a 6-drying pipe, a 7-throttling device, an 8-outdoor unit air-cooled heat exchanger, a 9-first heat exchanger, a 10-second heat exchanger, a 11-first water pump, a 12-second water pump, a 13-low-temperature water tank, a 14-check valve, a 15-first valve, a 16-auxiliary electric heater, a 17-high-temperature constant-temperature water tank, a 18-third valve, a 19-solar heat collecting plate, a 20-second valve, a 21-third water pump and a 22-fourth water pump.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely explained below with reference to the drawings in the embodiments of the present invention.
Referring to fig. 1 to illustrate the embodiment, a solar air source heat pump triple co-generation system includes an air source heat pump mechanism, a solar heat collection mechanism, a first heat exchanger 9 and a second heat exchanger 10, where the air source heat pump mechanism includes a compressor 1, a four-way reversing valve 2, an indoor unit air-cooled heat exchanger 5, a drying pipe 6, a throttling device 7 and an outdoor unit air-cooled heat exchanger 8, four interfaces of the four-way reversing valve 2 are respectively connected to an outlet of the compressor 1, an inlet of the compressor 1, an outer cavity of the second heat exchanger 10 and the indoor unit air-cooled heat exchanger 5, the indoor unit air-cooled heat exchanger 5 is sequentially connected to the drying pipe 6, the throttling device 7 and the outdoor unit air-cooled heat exchanger 8, the outdoor unit air-cooled heat exchanger 8 is connected to the outer cavity of the first heat exchanger 9, and the outer cavity of the; the solar heat collection mechanism comprises a low-temperature water tank 13, a first valve 15, a high-temperature constant-temperature water tank 17, a solar heat collection plate 19, a second valve 20, a third water pump 21 and a fourth water pump 22, wherein the low-temperature water tank 13 is connected with the high-temperature constant-temperature water tank 17 through the first valve 15 and the fourth water pump 22 respectively, the solar heat collection plate 19 is connected with the inside of the high-temperature constant-temperature water tank 17 after being connected with the second valve 20 and the third water pump 21 in sequence, tap water is supplied to the inlet end of the low-temperature water tank 13, constant-temperature hot water is supplied to the outlet end of the high-temperature constant-temperature water tank 17, the inside of the low-temperature water tank 13 is connected with the inner cavity of the first heat exchanger 9 through the second water pump.
This embodiment be equipped with supplementary electric heater 16 in the high temperature thermostatic water tank 17, be provided with vapour and liquid separator 3 between the entry of four-way reversing valve 2 and compressor 1, be connected with solenoid valve 4 between four-way reversing valve 2 and the indoor set air-cooled heat exchanger 5, be connected with check valve 14 between low temperature water tank 13 and the high temperature thermostatic water tank 17, high temperature thermostatic water tank 17 exit end is provided with third valve 18, first heat exchanger 9 and second heat exchanger 10 are double-pipe heat exchanger, compressor 1 is frequency conversion compressor, first water pump 11, second water pump 12, third water pump 21 and fourth water pump 22 are the frequency conversion water pump, throttling arrangement 7 is the capillary.
The invention also provides a using method of the solar energy-air source heat pump triple co-generation system, which comprises a single refrigeration mode, a refrigeration and hot water heating mode, a single heating mode, an air source heat pump and solar energy heat collection combined heating mode, a solar energy hot water heating mode, a defrosting mode and an auxiliary electric heater hot water heating mode.
The single refrigeration mode is operated when no hot water is required to be prepared in the cold supply requirement, the first water pump 11 and the second water pump 12 are closed at the moment, the air source heat pump mechanism works independently, high-temperature and high-pressure refrigerant is compressed by the compressor 1 and then sequentially flows through the four-way reversing valve 2, the second heat exchanger 10 and the outer cavity of the first heat exchanger 9, heat is released through the outdoor unit air-cooled heat exchanger 8, is throttled by the throttling device 7, flows through the drying pipe 6 to enter the indoor unit air-cooled heat exchanger 5 to absorb heat, and then returns to the compressor 1 through the four-way reversing valve 2 and the gas-liquid separator 3, so that refrigeration is realized through.
Simultaneously has the requirements of supplying cold and hot water, when the solar radiation is not sufficient or the temperature of cold water is lower, the refrigerating and hot water heating mode is operated, namely the refrigerating and condensing heat recovery mode, a fan of an air-cooled heat exchanger 8 of an outdoor unit is closed in an initial state, the flow direction of a refrigerant in an air source heat pump mechanism is the same as that of a single refrigerating mode, a second water pump 12 is started, water in a high-temperature constant-temperature water tank 17 flows through an inner cavity of a first heat exchanger 9 to exchange heat with the refrigerant, heat in the air source heat pump mechanism is used for heating water in the high-temperature constant-temperature water tank 17, when the water in the high-temperature constant-temperature water tank 17 reaches a set temperature, the second water pump 12 is closed, the first water pump 11 is started simultaneously, the water in a low-temperature water tank 13 flows through an inner cavity of a second heat exchanger 10 to exchange heat with the refrigerant, the heat in the air source heat pump mechanism is used, and the first water pump 11 is turned off, and meanwhile, the fan of the air cooling heat exchanger 8 of the outdoor unit is turned on, so that redundant heat is dissipated, and refrigeration and hot water heating are realized.
The solar air-cooled heat exchanger has the heating requirement, when the outdoor temperature is proper, the single heating mode is operated, the air source heat pump mechanism is used for independently heating and operating, the solar heat collecting system is used for independently heating water, at the moment, the first water pump 11 and the second water pump 12 are turned off, the air source heat pump mechanism works independently, a high-temperature high-pressure refrigerant is compressed by the compressor 1, flows through the four-way reversing valve 2, releases heat through the indoor unit air-cooled heat exchanger 5, is throttled by the throttling device 7 after passing through the drying pipe 6, absorbs heat through the outdoor unit air-cooled heat exchanger 8, sequentially passes through the outer cavities of the first heat exchanger 9 and the second heat exchanger 10, and returns to the compressor 1 through the four-way reversing valve.
When heating is required, when solar radiation is abundant and the air temperature is low, the air source heat pump and solar heat collection combined heating mode is operated, at this time, the first valve 15, the third water pump 21 and the fourth water pump 22 are firstly opened, the solar heat collection plate 19 is used for heating water in the high-temperature constant-temperature water tank 17 and the low-temperature water tank 13, when the water in the high-temperature constant-temperature water tank 17 reaches a set temperature, the first valve 15 and the fourth water pump 22 are closed, then the solar heat collection mechanism only heats the water in the constant-temperature water tank 17, the first water pump 11 is simultaneously opened, the flow direction of a refrigerant in the air source heat pump mechanism is the same as that of the single heating mode, the water in the low-temperature water tank 13 enters the inner cavity of the second heat exchanger 10 to exchange heat with the refrigerant, the air source heat pump mechanism absorbs heat from the low-temperature water tank 13 for heating, the water temperature of the constant-temperature, at this moment, the air source heat pump mechanism takes heat from outdoor air and the low-temperature water tank 13, the water temperature of the high-temperature constant-temperature water tank 17 is not affected, and the double water tanks are arranged to realize the functions of simultaneously taking heat and supplying constant-temperature hot water in winter.
The solar water heating mode is operated when the weather condition is better, the mode is also the most energy-saving mode, and can be subdivided into two working conditions according to the weather condition, the first working condition is that the first valve 15, the third water pump 21 and the fourth water pump 22 are opened when the first working condition is operated, the high-temperature constant-temperature water tank 17 and the low-temperature water tank 13 form a serial loop, and the solar heat collecting plate 19 is used for heating water in the high-temperature constant-temperature water tank 17 and the low-temperature water tank 13; in the second working condition, when the solar water heater operates, only the third water pump 21 is started, and the solar heat collecting plate 19 is used for independently heating water in the high-temperature constant-temperature water tank 17;
when the outdoor unit air-cooled heat exchanger 8 has a defrosting requirement, the defrosting mode is operated, the air source heat pump mechanism operates according to a heating process, the flow direction of the refrigerant is the same as that of the single heating mode, the first water pump 11 and/or the second water pump 12 are/is started, the rotating speed of the first water pump 11 and/or the second water pump 12 is increased, heat exchange between water in the high-temperature constant-temperature water tank 17 and/or the low-temperature water tank 13 and the refrigerant in the air source heat pump mechanism is accelerated, the temperature of the refrigerant entering the compressor 1 is increased, the temperature of the refrigerant entering the outdoor unit air-cooled heat exchanger 8 is further increased, the water flow passing through the double-pipe heat exchanger is increased by controlling the variable-frequency water pump, the temperature of the refrigerant entering the variable-frequency compressor is. Compared with the air source heat pump and solar heat collection combined heating mode, the rotation speed of the first water pump 11 and/or the second water pump 12 is larger in the defrosting mode.
When extreme weather is met, the heat collection effect of the solar heat collection mechanism is poor, the auxiliary electric heater hot water making mode is operated when the user demand cannot be met, the auxiliary electric heater 16 is started, the auxiliary electric heater 16 is used for heating water in the high-temperature constant-temperature water tank 17, and when the water in the high-temperature constant-temperature water tank 17 reaches the set temperature, the auxiliary electric heater 16 is closed.
The solar air source heat pump triple co-generation system and the use method thereof provided by the invention are described in detail, a specific example is applied in the description to explain the principle and the implementation mode of the invention, and the description of the embodiment is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (10)
1. A solar energy air source heat pump trigeminy supplies system which characterized in that: it comprises an air source heat pump mechanism, a solar heat collecting mechanism, a first heat exchanger (9) and a second heat exchanger (10), the air source heat pump mechanism comprises a compressor (1), a four-way reversing valve (2), an indoor unit air-cooled heat exchanger (5), a drying pipe (6), a throttling device (7) and an outdoor unit air-cooled heat exchanger (8), four interfaces of the four-way reversing valve (2) are respectively connected with an outlet of the compressor (1), an inlet of the compressor (1), an outer cavity of the second heat exchanger (10) and the air-cooled heat exchanger (5) of the indoor unit, the indoor unit air-cooled heat exchanger (5) is connected with the drying pipe (6), the throttling device (7) and the outdoor unit air-cooled heat exchanger (8) in sequence, the outdoor unit air-cooled heat exchanger (8) is connected with the outer cavity of the first heat exchanger (9), the outer cavity of the first heat exchanger (9) is connected with the outer cavity of the second heat exchanger (10); the solar heat collection mechanism comprises a low-temperature water tank (13), a first valve (15), a high-temperature constant-temperature water tank (17), a solar heat collection plate (19), a second valve (20), a third water pump (21) and a fourth water pump (22), the low-temperature water tank (13) is respectively connected with the high-temperature constant-temperature water tank (17) through a first valve (15) and a fourth water pump (22), the solar heat collecting plate (19) is connected with the second valve (20) and the third water pump (21) in sequence and then is connected with the inside of the high-temperature constant-temperature water tank (17), tap water is supplied to the inlet end of the low-temperature water tank (13), constant-temperature hot water is supplied to the outlet end of the high-temperature constant-temperature water tank (17), the interior of the low-temperature water tank (13) is connected with the inner cavity of the first heat exchanger (9) through a second water pump (12), the interior of the high-temperature constant-temperature water tank (17) is connected with the inner cavity of the second heat exchanger (10) through a first water pump (11).
2. The solar-air source heat pump triple co-generation system of claim 1, wherein: an auxiliary electric heater (16) is arranged in the high-temperature constant-temperature water tank (17).
3. The solar-air source heat pump triple co-generation system of claim 1, wherein: and a gas-liquid separator (3) is arranged between the four-way reversing valve (2) and the inlet of the compressor (1).
4. The solar-air source heat pump triple co-generation system of claim 1, wherein: and an electromagnetic valve (4) is connected between the four-way reversing valve (2) and the indoor unit air-cooled heat exchanger (5).
5. The solar-air source heat pump triple co-generation system of claim 1, wherein: and a check valve (14) is connected between the low-temperature water tank (13) and the high-temperature constant-temperature water tank (17).
6. The solar-air source heat pump triple co-generation system of claim 1, wherein: and a third valve (18) is arranged at the outlet end of the high-temperature constant-temperature water tank (17).
7. The solar-air source heat pump triple co-generation system of claim 1, wherein: the first heat exchanger (9) and the second heat exchanger (10) are both double-pipe heat exchangers.
8. The solar-air source heat pump triple co-generation system of claim 1, wherein: the compressor (1) is a variable-frequency compressor, the first water pump (11), the second water pump (12), the third water pump (21) and the fourth water pump (22) are variable-frequency water pumps, and the throttling device (7) is a capillary tube.
9. The use method of the solar energy air source heat pump triple co-generation system as claimed in claim 1, characterized in that: the system comprises a single refrigeration mode, a refrigeration and hot water heating mode, a single heating mode, an air source heat pump and solar heat collection combined heating mode, a solar hot water heating mode and a defrosting mode;
when the single refrigeration mode is operated, the first water pump (11) and the second water pump (12) are closed, the air source heat pump mechanism works independently, a refrigerant is compressed by the compressor (1), then flows through the four-way reversing valve (2), the second heat exchanger (10) and the outer cavity of the first heat exchanger (9) in sequence, releases heat through the outdoor unit air-cooled heat exchanger (8), is throttled by the throttling device (7), flows through the drying pipe (6), enters the indoor unit air-cooled heat exchanger (5) to absorb heat, and then returns to the compressor (1) through the four-way reversing valve (2) and the gas-liquid separator (3), so that refrigeration is realized through circulation;
when the air-cooling and water-heating mode operates, a fan of the air-cooling heat exchanger (8) of the outdoor unit is closed in an initial state, the flow direction of a refrigerant in an air source heat pump mechanism is the same as that of a single refrigeration mode, a second water pump (12) is started, water in a high-temperature constant-temperature water tank (17) flows through an inner cavity of a first heat exchanger (9) to exchange heat with the refrigerant, heat in the air source heat pump mechanism is used for heating the water in the high-temperature constant-temperature water tank (17), when the water in the high-temperature constant-temperature water tank (17) reaches a set temperature, the second water pump (12) is closed and the first water pump (11) is started at the same time, the water in a low-temperature water tank (13) flows through an inner cavity of a second heat exchanger (10) to exchange heat with the refrigerant, the heat in the air source heat pump mechanism is used for heating the water in the low-temperature water tank (13), when the water in the low-temperature water, surplus heat is dissipated, and refrigeration and hot water preparation are realized;
when the single heating mode operates, the first water pump (11) and the second water pump (12) are closed, the air source heat pump mechanism works independently, a refrigerant is compressed by the compressor (1), flows through the four-way reversing valve (2), releases heat through the indoor unit air-cooled heat exchanger (5), is throttled by the throttling device (7) after passing through the drying pipe (6), absorbs heat through the outdoor unit air-cooled heat exchanger (8), sequentially passes through outer cavities of the first heat exchanger (9) and the second heat exchanger (10), and then returns to the compressor (1) through the four-way reversing valve (2) and the gas-liquid separator (3), so that heating is realized in a circulating manner;
when the air source heat pump and solar heat collection combined heating mode operates, a first valve (15), a third water pump (21) and a fourth water pump (22) are started firstly, a solar heat collection plate (19) is utilized to heat water in a high-temperature constant-temperature water tank (17) and a low-temperature water tank (13), when the water in the high-temperature constant-temperature water tank (17) reaches a set temperature, the first valve (15) and the fourth water pump (22) are closed, the first water pump (11) is started simultaneously, the flow direction of a refrigerant in the air source heat pump mechanism is the same as that of a single heating mode, the water in the low-temperature water tank (13) enters an inner cavity of a second heat exchanger (10) to exchange heat with the refrigerant, the air source heat pump mechanism absorbs heat from the low-temperature water tank (13) for heating, and the air source heat pump;
the solar water heating mode comprises two working conditions, wherein the first working condition is that a first valve (15), a third water pump (21) and a fourth water pump (22) are opened when the solar water heating mode operates, a high-temperature constant-temperature water tank (17) and a low-temperature water tank (13) form a series loop, and a solar heat collecting plate (19) is used for heating water in the high-temperature constant-temperature water tank (17) and the low-temperature water tank (13); in the second working condition, when the solar water heater operates, only the third water pump (21) is started, and the solar heat collecting plate (19) is utilized to independently heat water in the high-temperature constant-temperature water tank (17);
when the defrosting mode is operated, the flow direction of the refrigerant in the air source heat pump mechanism is the same as that of the single heating mode, the first water pump (11) and/or the second water pump (12) are/is started, water in the high-temperature constant-temperature water tank (17) and/or the low-temperature water tank (13) exchanges heat with the refrigerant in the air source heat pump mechanism, the temperature of the refrigerant is increased, the temperature of the refrigerant entering the air cooling heat exchanger (8) of the outdoor unit is increased, and natural defrosting is achieved.
10. The use method of the solar energy air source heat pump triple co-generation system according to claim 9, characterized in that: the water heater also comprises an auxiliary electric heater water heating mode, when the auxiliary electric heater water heating mode operates, the auxiliary electric heater (16) is started, the auxiliary electric heater (16) is utilized to heat water in the high-temperature constant-temperature water tank (17), and when the water in the high-temperature constant-temperature water tank (17) reaches a set temperature, the auxiliary electric heater (16) is closed.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112880237A (en) * | 2021-01-13 | 2021-06-01 | 东南大学 | Solar auxiliary air source heat pump triple co-generation system |
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| CN105258377A (en) * | 2015-11-06 | 2016-01-20 | 武汉科技大学 | Solar energy-air source heat pump based triple-generation supply device |
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