CN112880237A - Solar auxiliary air source heat pump triple co-generation system - Google Patents
Solar auxiliary air source heat pump triple co-generation system Download PDFInfo
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- CN112880237A CN112880237A CN202110046668.XA CN202110046668A CN112880237A CN 112880237 A CN112880237 A CN 112880237A CN 202110046668 A CN202110046668 A CN 202110046668A CN 112880237 A CN112880237 A CN 112880237A
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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
- F25B30/02—Heat pumps of the compression type
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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
- 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
- F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
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Abstract
The invention relates to a solar auxiliary air source heat pump triple co-generation system, which comprises an air source heat pump water heater system and a photovoltaic power generation and heating integrated system, wherein the two systems are respectively provided with independent working medium loops for heating domestic hot water, the two systems are connected in the loops through a high-temperature heat storage water tank, and heat exchange is realized through a refrigerant. The system can independently supply hot water, can supply hot water by combining solar energy and perform air treatment, realizes a more reasonable energy transfer control mode, and can greatly save energy. The invention designs a complete air conditioning system for supplying domestic hot water and power from the design aspect of the whole system. The method solves the problem of performance attenuation of the heat pump when the evaporator frosts in winter, improves the stability of the temperature of hot water, and ensures that the air source heat pump water heater continuously and normally operates for a long time in cold weather.
Description
Technical Field
The invention relates to the technical field of air source heat pumps, in particular to a solar auxiliary air source heat pump triple co-generation system.
Background
In public buildings, there is a huge building energy consumption, wherein the requirements of domestic hot water and air conditioning account for the largest proportion of the building energy consumption. In order to save energy, an air source heat pump is usually adopted in the market for supplying heat, and the heat is taken from outdoor air, so that the high-efficiency utilization of electric energy is realized, and the purposes of energy conservation and environmental protection are achieved. However, most air source heat pump units in the market can only realize the functions of independent refrigeration, independent heating, refrigeration, heating and the like, and do not have the function of continuously preparing hot water and simultaneously treating indoor air. If an independent fresh air system is arranged, a set of air conditioning system needs to be added, so that initial investment is increased, a special fresh air machine room needs to be arranged, and an air pipe arrangement space is reserved. Furthermore, in humid seasons in southern areas, a large amount of fresh air which is not controlled and treated enters the indoor environment, so that the phenomenon of indoor moisture regain and mildew is aggravated.
And the air source heat pump has a series of problems when operating in winter, namely the economic performance coefficient of the single heat source heat pump is reduced. As the ambient temperature decreases, the pressure ratio of the compressor increases and the coefficient of performance COP of the system decreases dramatically. Secondly, when the air source heat pump operates in winter, the surface temperature of the evaporator is low, water is analyzed to form frost layers when air flows through the evaporator coil, if the frost layers cannot be removed in time, the heat exchange effect of the evaporator is seriously influenced, even the shutdown occurs, the heat supply stability and the machine energy efficiency are seriously influenced, and the heat supply in winter is insufficient.
Aiming at the first problem, solar energy can be adopted as auxiliary energy, and the influence of outdoor air temperature and relative humidity on winter heating along with an air source heat pump during heating or hot water supply in severe cold winter is reduced by reasonably and effectively configuring a solar energy system. However, the heat supply capacity of the solar heat collector is obviously influenced by the intensity of solar radiation, and has the defects of intermittence and instability; the following are currently common defrosting solutions for the second problem: (1) the electric heating defrosting mode adopts a high-quality auxiliary power supply to defrost, has extremely low energy utilization rate, and is not beneficial to energy conservation and environmental protection; (2) in the reverse-cycle defrosting mode, when the heat pump operates in defrosting, the outdoor heat exchanger needs to be switched from the condenser to the evaporator, and the indoor heat exchanger is switched from the evaporator to the condenser, so that heat is absorbed from the interior of a building, and the heat supply effect is seriously influenced; (3) in the hot gas bypass mode, defrosting energy comes from high-temperature exhaust of the compressor, heat supply to the indoor is reduced, defrosting time is long, suction superheat degree is low, and meanwhile, high-temperature exhaust pressure is high, so that certain impact is generated on the compressor, and the safety of the compressor is damaged.
Disclosure of Invention
The invention provides a solar auxiliary air source heat pump triple co-generation system, which is organically combined with an air source heat pump water heater system through a photovoltaic power generation and heating integrated system to form an air source heat pump auxiliary solar heating system, so that the influence of outdoor air temperature and relative humidity on heating in winter along with an air source heat pump during heating or hot water supply in severe cold winter is reduced, the service life of the solar heating system is prolonged, the defect that the heating efficiency of the air source heat pump is reduced in the severe cold period of heating is overcome, and the defects that the heating capacity of a solar heat collector is obviously influenced by solar radiation intensity, and is intermittent and unstable are overcome.
The technical scheme adopted by the invention is as follows:
a solar energy auxiliary air source heat pump trigeminy supplies system includes:
the air source heat pump water heater system comprises a compressor, a water-cooled condenser, a four-way reversing valve, a first heat exchanger, an outdoor heat exchanger and a heat storage water tank, wherein the compressor, the water-cooled condenser, the four-way reversing valve, the first heat exchanger and the outdoor heat exchanger form a refrigerant circulation loop; the four-way reversing valve switches the flow direction of the refrigerant, so that the functions of the evaporator and the subcooler of the first heat exchanger and the outdoor heat exchanger are switched, and the heat exchange requirements in different seasons are met; a water side pipeline of the water-cooled condenser is connected with the heat storage water tank to provide hot water for the heat storage water tank; the outdoor heat exchanger is provided with a water side pipeline connected with the heat storage water tank so as to meet the defrosting requirement of a refrigerant side pipeline of the outdoor heat exchanger in a winter environment;
the air treatment device comprises an air flow channel for supplying fresh air to the indoor space, and a heat exchange coil and a heating coil are arranged in the air flow channel; the heat exchange coil is connected with a water side pipeline of the first heat exchanger for heat exchange; the heat storage water tank is connected with the heating coil pipe to provide heat for the heating coil pipe;
photovoltaic power generation integrative system that generates heat, including photovoltaic board, the power storage device who is connected with the photovoltaic board, with photovoltaic board heat transfer back with the heat supply water route that heat storage water tank connects.
The further scheme is as follows:
in summer, a refrigerant passes through the water-cooled condenser, the four-way reversing valve, the outdoor heat exchanger, the first heat exchanger, the four-way reversing valve and the compressor to form a refrigerant circulation loop, wherein a refrigerant side inlet of the first heat exchanger is connected with a refrigerant side outlet of the outdoor heat exchanger;
in winter, a refrigerant passes through the water-cooled condenser, the four-way reversing valve, the first heat exchanger, the outdoor heat exchanger, the four-way reversing valve and the compressor to form a refrigerant circulation loop, wherein a refrigerant side outlet of the first heat exchanger is connected with a refrigerant side inlet of the outdoor heat exchanger.
The water side outlet and the water side inlet of the first heat exchanger are respectively and correspondingly connected with the inlet and the outlet of the heat exchange coil through pipelines to supply cold or heat for the heat exchange coil; the water inlet and outlet of the outdoor heat exchanger are respectively and correspondingly connected with the water outlet and the water return port of the heat storage water tank to form a circulation loop, and the water outlet and the water return port are respectively and correspondingly connected with the inlet and outlet of the heating coil through branch pipes to form a circulation loop.
The water side inlet of the outdoor heat exchanger is provided with a first three-way valve and a third water pump on a pipeline connected with the water outlet, the water side outlet of the outdoor heat exchanger is provided with a second three-way valve on a pipeline connected with the water return port, and the first three-way valve and the second three-way valve are correspondingly connected with the inlet and the outlet of the heating coil through branch pipes to form a heat exchange circulation loop.
And a second water pump and a first valve are arranged on a pipeline connecting the water side outlet of the first heat exchanger and the inlet of the heat exchange coil.
The four-way reversing valve is respectively connected with the compressor inlet, the refrigerant outlet of the water-cooled condenser, the first heat exchanger and the refrigerant side pipeline of the outdoor heat exchanger; a first water pump is arranged on a pipeline connecting the refrigerant outlet of the compressor and the refrigerant inlet of the water-cooled condenser; the water inlet and outlet of the water-cooled condenser are connected with the heat storage water tank through pipelines to form a hot water loop; and an expansion valve is arranged on a refrigerant side connecting pipeline of the first heat exchanger refrigerant and the outdoor heat exchanger.
The heat exchange coil is located upstream of the heating coil; the air flow channel is provided with an air inlet A at the upstream side of the heat exchange coil, an air supply outlet B at the downstream side of the heating coil, and an air return inlet C at the indoor environment at the interval between the heat exchange coil and the heating coil.
A primary air filter is arranged at the upstream of the heat exchange coil in the air flow channel, and a centrifugal blower and a final air filter are arranged at the downstream of the heating coil.
External cold water flows into the photovoltaic panel through a first water inlet, the heat-exchanged water is connected with the heat storage water tank through a water outlet pipeline, a heat collector, a fourth water pump and a third three-way valve are arranged on the water outlet pipeline, the third three-way valve is connected with a second water inlet of the photovoltaic panel through a water return pipeline, and the second water inlet is also communicated with the water outlet pipeline; and a hot water outlet is also formed in the heat storage water tank.
The outdoor heat exchanger is equipped with a fan that enhances heat exchange.
The invention has the following beneficial effects:
the invention provides an integrated triple supply system for heating hot water, regulating indoor air and supplying power. The system is provided with an air source heat pump system and a photovoltaic heating power generation system, the two systems are respectively provided with independent working medium loops for heating domestic hot water, the two systems are connected in the loops through a high-temperature heat storage water tank, and heat exchange is realized through a refrigerant. An air treatment device is arranged, and the temperature of fresh air is regulated and controlled by an air source heat pump system. The system can supply hot water independently, can supply hot water by combining solar energy, and can process air, thereby realizing a more reasonable energy transfer control mode and greatly saving energy.
According to the invention, the air source heat pump is used for heating the hot water loop, the function switching of the first heat exchanger is utilized for realizing the cooling or heating of the heat exchange coil, the outdoor heat exchanger is utilized for heating the heat exchange coil, the heat exchange with fresh air is realized, the energy consumption of the system is reduced, and the energy efficiency of the system is improved.
The invention realizes the function switching of the evaporator and the subcooler of the first heat exchanger and the outdoor heat exchanger by utilizing the electromagnetic four-way reversing valve. The three working modes of refrigerating and dehumidifying in summer, heating in winter, full fresh air operation in transition seasons and the like are realized, and the requirements of users on indoor fresh air and thermal comfort can be basically met. In summer, the requirement of supplying domestic hot water is met, meanwhile, the cold energy generated in the operation process of the air source heat pump water heater system is fully utilized to adjust outdoor air, the energy waste is reduced, and the energy utilization rate is improved. In winter, the fresh air heating function is realized by switching the passage of the electromagnetic four-way reversing valve, and the outdoor unit is defrosted through the hot water loop.
The invention provides a method for solving the problem of performance attenuation of the heat pump when an evaporator frosts in winter for the air source heat pump water heater, improves the stability of the temperature of hot water and hot water, and ensures that the air source heat pump water heater can continuously and normally operate for a long time in cold weather. The outdoor heat exchanger is arranged in the invention, a hot water defrosting mode is adopted, the air source heat pump heating is not required to be uninterrupted, the defrosting of the outdoor unit is realized on the basis of not interrupting the heating process in winter, the energy efficiency can be greatly improved, and the stability of hot water supply is improved.
The solar photovoltaic power generation and heating integrated system is used for assisting the air source heat pump system, the cold water inlet is arranged on the photovoltaic panel, and the hot water circulation loop is arranged to realize annual hot water supply and power supply, so that the energy utilization efficiency of the system is improved, and the stability of domestic hot water supply is also improved.
Drawings
FIG. 1 is a schematic diagram of the system structure of the cooling, dehumidifying and hot water supplying mode in summer according to the present invention.
Fig. 2 is a schematic structural view of a system for heating hot water in winter according to the present invention.
In the figure: 1. a compressor; 2. a first water pump; 3. a water-cooled condenser; 4. a four-way reversing valve; 5. a first heat exchanger; 6. a second water pump; 7. a first valve; 8. an expansion valve; 9. an outdoor heat exchanger; 10. a first three-way valve; 11. a third water pump; 12. a second three-way valve; 13. a heat storage water tank; 14. a third three-way valve; 15. a fourth water pump; 16. a heat collector; 17. a photovoltaic panel; 18. an electrical storage device; k1, primary air filter; k2, heat exchange coil; k3, heating coil pipe; k4, centrifugal blower; k5, final stage air filter; t1, a water outlet; t2, a water return port.
Detailed Description
The following describes embodiments of the present invention with reference to the drawings.
The solar energy auxiliary air source heat pump trigeminy supplies system of this embodiment includes: the air source heat pump water heater system, the air treatment device and the photovoltaic power generation and heating integrated system.
As shown in fig. 1, the air-source heat pump water heater system includes a refrigerant circulation circuit and a hot water circuit, and the refrigerant circulation circuit includes a compressor 1, a first water pump 2 (pumping refrigerant), a water-cooled condenser 3, a four-way selector valve 4, and an outdoor heat exchanger 9. The hot water circuit comprises a hot water storage tank 13 and a circulation line connected thereto.
The water-cooled condenser 3 comprises a water side pipeline and a refrigerant side pipeline, and the refrigerant of the water-cooled condenser 3 releases heat to the water side pipeline in the condensation process, so that the heat storage water tank 13 is heated.
Specifically, a refrigerant outlet of the compressor 1 is connected with a refrigerant side inlet 3a of the water-cooled condenser 3 through the first water pump 2, a refrigerant side outlet 3b of the water-cooled condenser 3 is connected with a right side interface of the four-way reversing valve 4, a left side interface of the four-way reversing valve 4 is connected with a refrigerant side interface 5a of the first heat exchanger 5, a refrigerant side interface 5b of the first heat exchanger 5 is connected with one end of a refrigerant side pipeline of the outdoor heat exchanger 9 through a pipeline, the other end of the refrigerant side pipeline of the outdoor heat exchanger 9 is connected with a lower side interface of the four-way reversing valve 4, and an upper side interface of the four-way reversing.
Specifically, an expansion valve 8 is provided on a refrigerant-side connecting pipe between the refrigerant of the first heat exchanger 5 and the outdoor heat exchanger 9.
Specifically, the first heat exchanger 5 includes a water-side and a refrigerant-side piping, and functions as a subcooler (low-temperature condenser) and an evaporator in winter and summer, respectively. The outdoor heat exchanger 9 respectively plays the roles of an evaporator and a subcooler in winter and summer, so that the outdoor heat exchanger 9 is used as an evaporator in winter, the side surface temperature of a refrigerant of the outdoor heat exchanger is low, and the frosting phenomenon is easy to occur, a hot water defrosting pipeline is arranged for this purpose, namely, a water side pipeline is arranged in the outdoor heat exchanger 9 (a common air-cooled heat exchanger) and is connected with the heat storage water tank 13, and hot water defrosting is carried out on the refrigerant side pipeline of the outdoor heat exchanger 9 in winter by using hot water in the heat storage water tank 13.
Specifically, a water outlet T1 and a water return port T2 are arranged on the heat storage water tank 13, a water inlet and a water outlet of the outdoor heat exchanger 9 are correspondingly connected with the water outlet T1 and the water return port T2 of the heat storage water tank 13, respectively, a first three-way valve 10 and a third water pump 11 are arranged on a pipeline connecting a water inlet of the outdoor heat exchanger 9 and the water outlet T1, and a second three-way valve 12 is arranged on a pipeline connecting a water outlet of the outdoor heat exchanger 9 and the water return port T2. The water inlet and outlet of the water-cooled condenser 3 are connected with the heat storage water tank 13 through pipelines to form a hot water loop.
Air treatment facilities is as new trend processing apparatus, including the air runner, be provided with heat exchange coil K2 and heating coil K3 in it, heat exchange coil K2 is located heating coil K3's upper reaches, the air runner be located heat exchange coil K2 upstream side be equipped with outside air's air intake A, the downstream side that is located heating coil K3 is equipped with the supply-air outlet B of sending new trend to the room, be located between heat exchange coil K2 and the heating coil K3 interval department and be equipped with return air inlet C under the indoor environment. The air flow passage is provided with a primary air filter K1 at the upstream of the heat exchange coil K2, and a centrifugal blower K4 and a final air filter K5 at the downstream of the heating coil K3.
The water side outlet 5c and the water side inlet 5d of the first heat exchanger 5 are correspondingly connected with the inlet and the outlet of the heat exchange coil K2 through pipelines respectively to supply cold or heat for the heat exchange coil K2.
Specifically, a second water pump 6 and a first valve 7 are arranged on a pipeline connecting the water side outlet 5c of the first heat exchanger 5 and the inlet of the heat exchange coil K2.
The water outlet T1 and the water return port T2 are correspondingly connected with the inlet and the outlet of the heating coil K3 through branch pipes respectively to form a heat exchange circulation loop. Specifically, the third ports of the first three-way valve 10 and the second three-way valve 12 are respectively and correspondingly connected with the inlet and the outlet of the heating coil K3 through branch pipes to form a heat exchange circulation loop.
The refrigerant circulation loop switches the flow direction of the refrigerant through the four-way reversing valve 4, so that the functions of the evaporator and the subcooler are switched by the first heat exchanger 5 and the outdoor heat exchanger 9, and the heat exchange requirements of dehumidification in summer and heating in winter are met.
As shown in fig. 1, in the summer (dehumidification) mode, the first heat exchanger 5 serves as an evaporator, and the outdoor heat exchanger 9 serves as a subcooler; the refrigerant passes through a water-cooled condenser 3, a four-way reversing valve 4, an outdoor heat exchanger 9, a first heat exchanger 5, the four-way reversing valve 4 and a compressor 1 to form a refrigerant circulation loop: the refrigerant becomes high-temperature high-pressure gas under the action of the compressor 1, dissipates heat to the heat storage water tank 13 through the water-cooled condenser 3, becomes medium-temperature high-pressure liquid, then enters the outdoor heat exchanger 9 through the four-way reversing valve 4 (electromagnetic four-way reversing valve) to dissipate heat and supercool outdoor air, becomes low-temperature high-pressure liquid, enters the first heat exchanger 5 through the expansion valve 8 to absorb heat, becomes low-temperature low-pressure gas, and enters the inlet of the variable-frequency compressor 1 through the four-way reversing valve 4; the dotted line and the solid line in fig. 1 indicate the operation paths of the refrigerant medium and the aqueous medium, respectively.
As shown in fig. 2, in the winter (heating) mode, the first heat exchanger 5 serves as a subcooler and the outdoor heat exchanger 9 serves as an evaporator; the refrigerant passes through a water-cooled condenser 3, a four-way reversing valve 4, a first heat exchanger 5, an outdoor heat exchanger 9, the four-way reversing valve 4 and a compressor 1 to form a refrigerant circulation loop: the refrigerant is compressed into high-temperature and high-pressure gas by the variable frequency compressor 1, is radiated to the heat storage water tank 13 by the water-cooled condenser 3 and is changed into medium-temperature and high-pressure liquid, then enters the first heat exchanger 5 through the four-way reversing valve 4 to release excessive cold and heat, is changed into low-temperature and high-pressure liquid, is throttled by the expansion valve 8 and is changed into a low-temperature and low-pressure two-phase state, enters the outdoor heat exchanger 9, and then enters the inlet of the variable frequency compressor 1 through the four-way reversing. The dotted line and the solid line in fig. 1 indicate the operation paths of the refrigerant medium and the aqueous medium, respectively.
Meanwhile, hot water in the heat storage water tank 13 is adopted to defrost the outdoor heat exchanger 9 in winter, according to the technical scheme, the outdoor heat exchanger 9 comprises an external shell and a refrigerant side pipeline and a hot water pipe which are arranged in the shell, a water outlet T1 of the heat storage water tank 13 is communicated with an inlet of the hot water pipe through a pipeline, and an outlet of the hot water pipe is communicated with a water return port T2.
In the winter heating mode, a refrigerant enters the first heat exchanger 5 through the four-way reversing valve 4 to release excessive heat and cool, so that air is heated, and the use energy efficiency of the air source heat pump is improved.
Specifically, the air treatment device is provided with a case outside, a flow channel for air treatment is formed in the case, the components are sequentially arranged from an air inlet A to an air outlet B, and the internal space of the case is divided into a plurality of compartments by the components, namely a primary air filter K1, a heat exchange coil K2, a heating coil K3, a centrifugal blower K4 and a final air filter K5. Wherein, the heat exchange coil K2 and the heating coil K3 adjust the air temperature.
The water outlet T1 of the hot water storage tank 13 is connected with the first three-way valve 10 through the third water pump 11 and is divided into two paths: one path of the hot water is connected with the input end of a water side pipeline of the outdoor heat exchanger 9, and the hot water after defrosting of the outdoor unit is output from the output end of the water side pipeline and returns to the hot water storage tank 13 through the second three-way valve 12 to form a first hot water circulation loop; one path is connected with the input end of the heating coil K3, and after air is heated by the heating coil K3, the heated air returns to the heat storage water tank 13 through the second three-way valve 12 to form a second hot water circulation loop.
In summer, the first heat exchanger 5 is an evaporator, and supplies cold to the heat exchange coil K2 through a water side pipeline thereof, namely the heat exchange coil K2 is a refrigerating coil, outdoor hot and humid air enters from the air inlet A in the direction of an arrow in the figure and exchanges heat with low-temperature water in the heat exchange coil K2, the hot and humid air is cooled and dehumidified and then is mixed with indoor return air from the return air inlet C in the direction of the arrow in the figure, and the cool air heated to a proper temperature by the heating coil K3 is sent into a room from the air supply inlet B in the direction of the arrow by the centrifugal blower K4;
the flow and the evaporation temperature of the refrigerant flowing through the first heat exchanger 5 can be adjusted through the variable frequency compressor 1, so that the cooling and dehumidifying capacity of the heat exchange coil K2 to fresh air is adjusted, and the variable frequency compressor is adjusted to achieve an energy-saving effect.
In winter, the passage of the electromagnetic four-way reversing valve 4 is switched, the first heat exchanger 5 is a subcooler, a water side pipeline of the subcooler absorbs subcooled heat and supplies heat to the heat exchange coil K2, namely the heat exchange coil K2 is a heating coil, low-temperature fresh air outdoors is preheated, and after being mixed with return air, the low-temperature fresh air is finally heated by the heating coil K3, so that the thermal comfort of the air fed into the room is ensured.
The photovoltaic power generation and heating integrated system comprises a photovoltaic plate 17, an electric storage device 18 connected with the photovoltaic plate 17, and a water path which exchanges heat with the photovoltaic plate 17 and is communicated with a heat storage water tank 13;
specifically, as shown in fig. 1, external cold water flows into the photovoltaic panel 17 through a first water inlet, the water after heat exchange is connected to the heat storage water tank 13 through a water outlet pipeline, the water outlet pipeline is provided with a heat collector 16, a fourth water pump 15 and a third three-way valve 14, the third three-way valve 14 is connected to a second water inlet of the photovoltaic panel 17 through a water return pipeline, and the second water inlet is also communicated with the water outlet pipeline.
And a hot water outlet connected with a user is arranged on the heat storage water tank 13.
A separate hot water outlet is also provided on the photovoltaic panel 17 as a backup interface for communication with an external user.
When the system does not need water supplement, the third three-way valve 14 is used for closing the water supplement inlet of the water tank, only circulating water is used for cooling the photovoltaic panel 17, and finally the circulating water is discharged from the water outlet at the water feeding side of the photovoltaic panel 17. When the outdoor illumination is sufficient, the photovoltaic panel 17 supplies power for indoor illumination, and redundant electric energy is stored through the electric power storage device 18, so that the indoor illumination power can be used when the outdoor illumination is insufficient.
According to the embodiment of the invention, three operation modes, namely a cooling and dehumidifying hot water supply mode in summer, a heating and hot water supply mode in winter and a hot water supply mode in transition season in fresh air operation, are formed by organically combining the air source heat pump water heater system, the air treatment device and the photovoltaic power generation and heating integrated system. The specific working process is as follows:
a summer refrigeration, dehumidification and hot water supply mode:
as shown in fig. 1, cold water flows into the photovoltaic panel 17 from the first water inlet to exchange heat with the photovoltaic panel, is preheated, flows out through the water outlet pipeline, is heated again by the heat collector 16, and then enters the hot water storage tank 13 through the fourth water pump 15 and the third three-way valve 14. The refrigerant becomes high-temperature high-pressure gas under the action of the variable frequency compressor 1, the heat is radiated to the heat storage water tank 13 through the water-cooled condenser 3 serving as a condenser, the water in the heat storage water tank 13 is heated, the refrigerant is changed into medium-temperature high-pressure liquid, then the medium-temperature high-pressure liquid enters the outdoor heat exchanger 9 through the four-way reversing valve 4 to be subjected to heat radiation and supercooling to be changed into low-temperature high-pressure liquid, the refrigerant is throttled by the expansion valve 8 to be changed into a low-temperature low-pressure two-phase state, enters the first heat exchanger 5 from the refrigerant side inlet 5b to be evaporated, is;
a water side outlet 5c of the first heat exchanger 5 is connected with an inlet of a heat exchange coil K2 through a first water pump 6, low-temperature water in the heat exchange coil K2 exchanges heat with outdoor hot and humid air entering from an air inlet A, and the low-temperature water after heat exchange returns to a water side inlet 5d of the first heat exchanger 5 from an outlet of a heat exchange coil K2 to complete circulation;
an outlet T1 of the heat storage water tank is connected with an inlet of a heating coil K3 through a third water pump 11 and a first three-way valve 10, high-temperature hot water in the heating coil K3 exchanges heat with air in an air flow channel, and the high-temperature hot water returns to the heat storage water tank 13 from an outlet of the heating coil K3 to complete circulation;
hot and humid air entering from an air inlet pipeline A of an air treatment cavity is firstly filtered by a primary filter K1, is cooled to a lower temperature by a heat exchange coil K2 and then is mixed with indoor return air entering from a return air inlet C, is heated to an appropriate temperature by a heating coil K3, and is then filtered by a final filter K5 and sent into a room from an air supply outlet B under the driving of a centrifugal blower K4;
because the outdoor heat exchanger 9 does not have the defrosting demand in summer, the outdoor heat exchanger 9 is used as a subcooler, in order to prevent the subcooled heat generated at the refrigerant side of the outdoor heat exchanger from being lower than the water temperature of the water tank to influence the heat storage water tank 13, pipelines between the water outlet T1 and the water return port T2 and the water side of the outdoor heat exchanger 9 are cut off through the first three-way valve 10 and the second three-way valve 12 until the water passages between the water outlet T1 and the water return port T2 are reserved and communicated with the water passages between the inlet and the outlet of the heating coil K3, and the normal water temperature of.
Winter heating and hot water supply mode:
as shown in fig. 2, cold water flows into the photovoltaic panel 17 from the first water inlet to exchange heat with the photovoltaic panel, is preheated, flows out through the water outlet pipeline, is heated again by the heat collector 16, and then enters the hot water storage tank 13 through the fourth water pump 15 and the third three-way valve 14. The refrigerant turns into high-temperature and high-pressure gas by the inverter compressor 1, and the gas radiates heat to the heat storage water tank 13 through the water-cooled condenser 3 serving as a condenser, thereby heating the low-temperature water in the heat storage water tank 13. The refrigerant is changed into medium-temperature high-pressure liquid, then enters the first heat exchanger 5 through the four-way reversing valve 4 to release excessive cold and heat, is changed into low-temperature high-pressure liquid, is changed into a low-temperature low-pressure two-phase state after being throttled by the expansion valve 8, enters the outdoor heat exchanger 9, and finally enters the inlet of the compressor 1 through the first four-way reversing valve 18 to complete circulation; a water side outlet 5c of the first heat exchanger 5 is connected with an inlet of a heat exchange coil K2 through a first water pump 6 to supply heat for a heat exchange coil K2, and after heat exchange is carried out on an outdoor cold air heat exchange coil K2 entering from an air inlet A, the outdoor cold air heat exchange coil returns to a water side inlet 5d of the first heat exchanger 5 from an outlet of a heat exchange coil K2 to complete circulation;
an outlet T1 of the heat storage water tank is connected with an inlet of a heating coil K3 through a third water pump 11 and a first three-way valve 10, high-temperature hot water in the heating coil K3 exchanges heat with air in an air flow channel, and the high-temperature hot water returns to the heat storage water tank from an outlet of the heating coil K3 to complete circulation; outdoor cold air enters from an air inlet A and is firstly filtered by a first filter K1, then is preheated to a medium temperature by a heat exchange coil K2 and then is mixed with indoor return air entering from a return air inlet C, the mixture is heated to a proper temperature by a heating coil K3, and then is filtered by a second filter K5 and sent into a room from an air supply outlet B under the driving of a centrifugal fan K4.
The hot water supply mode of full fresh air operation in transition season:
cold water flows into the photovoltaic panel 17 from the first water inlet to exchange heat with the photovoltaic panel, is preheated, flows out through the water outlet pipeline, is heated for the second time by the heat collector 16, and then enters the heat storage water tank 13 through the fourth water pump 15 and the third three-way valve 14. The refrigerant turns into high-temperature and high-pressure gas under the action of the inverter compressor 1, and the heat is radiated to the heat storage water tank 13 through the water-cooled condenser 3 to heat low-temperature water in the heat storage water tank 13. The refrigerant is changed into medium-temperature high-pressure liquid, enters the outdoor heat exchanger 9 through the four-way reversing valve 4, is subjected to heat dissipation and supercooling, is changed into low-temperature high-pressure liquid, is throttled by the expansion valve 8 and is changed into a low-temperature low-pressure two-phase state, enters the first heat exchanger 5 through the refrigerant side inlet 5b, is changed into low-temperature low-pressure gas, and enters the inlet of the variable frequency compressor 1 through the four-way reversing valve 4 to complete circulation;
the first valve 7, the first three-way valve 10 and the second three-way valve 12 are closed to prevent air from being processed, outdoor fresh air enters an air flow channel through the air inlet A, is firstly filtered through the first filter K1, then sequentially passes through the heat exchange coil K2 (not working at this moment) and the heating coil K3 (not working at this moment), then is driven by the centrifugal blower K4 to filter the fresh air through the second filter K2, and finally is blown out of clean fresh air from the air supply outlet B, so that the fresh air sent into the room can meet the requirements.
Claims (10)
1. The utility model provides a solar energy auxiliary air source heat pump trigeminy supplies system which characterized in that includes:
the air source heat pump water heater system comprises a compressor (1), a water-cooled condenser (3), a four-way reversing valve (4), a first heat exchanger (5), an outdoor heat exchanger (9) and a heat storage water tank (13), wherein the compressor, the water-cooled condenser (3), the four-way reversing valve, the first heat exchanger (5) and the outdoor heat exchanger form a refrigerant circulation loop; the four-way reversing valve (4) switches the flow direction of the refrigerant, so that the functions of the evaporator and the subcooler are switched by the first heat exchanger (5) and the outdoor heat exchanger (9), and the heat exchange requirements in different seasons are met; a water side pipeline of the water-cooled condenser (3) is connected with the heat storage water tank (13) to provide hot water for the heat storage water tank; the outdoor heat exchanger (9) is provided with a water side pipeline connected with the heat storage water tank (13) so as to meet the defrosting requirement of a refrigerant side pipeline of the outdoor heat exchanger (9) in a winter environment;
the air treatment device comprises an air channel for supplying fresh air to the indoor, and a heat exchange coil (K2) and a heating coil (K3) are arranged in the air channel; the heat exchange coil (K2) is connected with a water side pipeline of the first heat exchanger (5) for heat exchange; the hot water storage tank (13) is connected with the heating coil (K3) to provide heat for the heating coil;
photovoltaic power generation integrative system that generates heat, including photovoltaic board (17), power storage device (18) be connected with photovoltaic board (17), with photovoltaic board (17) heat transfer after with the heat supply water route that heat storage water tank (13) are connected.
2. The solar auxiliary air source heat pump triple co-generation system as claimed in claim 1, wherein in summer, refrigerant passes through the water-cooled condenser (3), the four-way reversing valve (4), the outdoor heat exchanger (9), the first heat exchanger (5), the four-way reversing valve (4) and the compressor (1) to form a refrigerant circulation loop, wherein a refrigerant side inlet of the first heat exchanger (5) is connected with a refrigerant side outlet of the outdoor heat exchanger (9);
in winter, refrigerant passes through the water-cooled condenser (3), the four-way reversing valve (4), the first heat exchanger (5), the outdoor heat exchanger (9), the four-way reversing valve (4) and the compressor (1) to form a refrigerant circulation loop, wherein a refrigerant side outlet of the first heat exchanger (5) is connected with a refrigerant side inlet of the outdoor heat exchanger (9).
3. The solar auxiliary air source heat pump triple co-generation system as claimed in claim 2, wherein the water side outlet and inlet of the first heat exchanger (5) are respectively and correspondingly connected with the inlet and outlet of the heat exchange coil (K2) through pipelines to supply cold or heat to the heat exchange coil (K2); the water side of outdoor heat exchanger (9) is gone into, the export respectively with delivery port (T1), return water mouth (T2) of heat storage water tank (13) correspond to be connected and form circulation circuit, delivery port (T1), return water mouth (T2) respectively through the branch pipe with heating coil pipe (K3) advance, the export corresponds to be connected and forms circulation circuit.
4. The solar auxiliary air source heat pump triple co-generation system as claimed in claim 3, wherein a first three-way valve (10) and a third water pump (11) are arranged on a pipeline connecting a water side inlet of the outdoor heat exchanger (9) and the water outlet (T1), a second three-way valve (12) is arranged on a pipeline connecting a water side outlet of the outdoor heat exchanger (9) and the water return port (T2), and the first three-way valve (10) and the second three-way valve (12) are correspondingly connected with an inlet and an outlet of the heating coil (K3) through branch pipes to form a heat exchange circulation loop.
5. The solar auxiliary air source heat pump triple co-generation system as claimed in claim 3, wherein a second water pump (6) and a first valve (7) are arranged on a pipeline connecting a water side outlet of the first heat exchanger (5) and an inlet of the heat exchange coil (K2).
6. The solar auxiliary air source heat pump triple co-generation system as claimed in claim 2, characterized in that the four-way reversing valve (4) is respectively connected with the inlet of the compressor (1), the refrigerant outlet of the water-cooled condenser (3), the first heat exchanger (5) and the refrigerant side pipeline of the outdoor heat exchanger (9); a first water pump (2) is arranged on a pipeline connecting a refrigerant outlet of the compressor (1) and a refrigerant inlet of the water-cooled condenser (3); the water inlet and outlet of the water-cooled condenser (3) are connected with the heat storage water tank (13) through pipelines to form a hot water loop; and an expansion valve (8) is arranged on a refrigerant side connecting pipeline of the refrigerant of the first heat exchanger (5) and the outdoor heat exchanger (9).
7. The solar-assisted air-source heat pump triple co-generation system according to claim 1, characterized in that the heat exchanging coil (K2) is located upstream of the heating coil (K3); an air inlet A is formed in the upstream side of the heat exchange coil (K2) of the air channel, an air supply outlet B is formed in the downstream side of the heating coil (K3), and a return air inlet C in the indoor environment is formed in the interval between the heat exchange coil (K2) and the heating coil (K3).
8. The triple co-generation system of claim 7, wherein a primary air filter (K1) is arranged in the air flow passage upstream of the heat exchange coil (K2), and a centrifugal blower (K4) and a final air filter (K5) are arranged downstream of the heating coil (K3).
9. The solar auxiliary air source heat pump triple co-generation system as claimed in claim 1, wherein external cold water flows into a photovoltaic panel (17) through a first water inlet, the heat-exchanged water is connected with the hot water storage tank (13) through a water outlet pipeline, a heat collector (16), a fourth water pump (15) and a third three-way valve (14) are arranged on the water outlet pipeline, the third three-way valve (14) is connected with a second water inlet of the photovoltaic panel (17) through a water return pipeline, and the second water inlet is also communicated with the water outlet pipeline; and a hot water outlet is also arranged on the heat storage water tank (13).
10. The solar-assisted air-source heat pump triple co-generation system according to claim 1, characterized in that the outdoor heat exchanger (9) is equipped with a fan for enhanced heat exchange.
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| CN202110046668.XA CN112880237A (en) | 2021-01-13 | 2021-01-13 | Solar auxiliary air source heat pump triple co-generation system |
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| CN202110046668.XA CN112880237A (en) | 2021-01-13 | 2021-01-13 | Solar auxiliary air source heat pump triple co-generation system |
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| CN112880237A true CN112880237A (en) | 2021-06-01 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114110849A (en) * | 2021-12-06 | 2022-03-01 | 中南大学 | Coupling type air conditioner and heat/water boiler integrated device |
| CN115127139A (en) * | 2022-06-29 | 2022-09-30 | 上海交通大学 | Cold supply, steam supply and heat supply triple supply system and working method thereof |
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