CN116697623B - Air source heat pump heating, hot water and refrigerating system with solar defrosting function and control method thereof - Google Patents
Air source heat pump heating, hot water and refrigerating system with solar defrosting function and control method thereof Download PDFInfo
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- CN116697623B CN116697623B CN202310625220.2A CN202310625220A CN116697623B CN 116697623 B CN116697623 B CN 116697623B CN 202310625220 A CN202310625220 A CN 202310625220A CN 116697623 B CN116697623 B CN 116697623B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 497
- 238000010438 heat treatment Methods 0.000 title claims abstract description 86
- 238000010257 thawing Methods 0.000 title claims abstract description 51
- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000005338 heat storage Methods 0.000 claims abstract description 102
- 238000005057 refrigeration Methods 0.000 claims abstract description 69
- 238000004146 energy storage Methods 0.000 claims abstract description 16
- 238000011084 recovery Methods 0.000 claims abstract description 15
- 239000003507 refrigerant Substances 0.000 claims description 26
- 239000007788 liquid Substances 0.000 claims description 15
- 238000001816 cooling Methods 0.000 claims description 11
- 239000008236 heating water Substances 0.000 claims description 9
- 230000001502 supplementing effect Effects 0.000 claims description 4
- 238000010521 absorption reaction Methods 0.000 claims description 2
- 238000004891 communication Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 4
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 229910052731 fluorine Inorganic materials 0.000 description 2
- 239000011737 fluorine Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 239000000523 sample Substances 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S10/00—Solar heat collectors using working fluids
- F24S10/70—Solar heat collectors using working fluids the working fluids being conveyed through tubular absorbing conduits
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S60/00—Arrangements for storing heat collected by solar heat collectors
- F24S60/30—Arrangements for storing heat collected by solar heat collectors storing heat in liquids
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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
- F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
- F25B47/02—Defrosting cycles
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- Chemical & Material Sciences (AREA)
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- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
The invention relates to an air source heat pump heating, hot water and refrigerating system for solar defrosting and a control method thereof in the field of thermal equipment, wherein the device comprises an air source heat pump unit, a solar heat collector, a heat pump assembly, a heat storage and exchange water tank and a living water tank, wherein a heat pump water inlet on the air source heat pump unit is connected with a water tank water outlet on the heat storage and exchange water tank through one path of a heat pump circulating pump, and the other path of the heat pump water inlet is connected with a heat collector water outlet of a solar heat collector through a first electromagnetic valve; the water outlet of the heat pump is divided into two paths, one path is connected with the water inlet of the water tank on the heat storage water tank, and the other path is connected with the water inlet of the solar heat collector; the heat exchange coil of the heat storage water tank and the water tank heat exchanger in the living water tank are connected through the heat pump assembly. When the device works, hot water supply, heating, refrigeration and energy storage are realized by switching the communication modes, and the interference among the working modes is small; the defrosting is convenient, heat recovery can be realized during refrigeration in summer, and heat energy can be efficiently utilized.
Description
Technical Field
The present invention relates to a thermal device, and more particularly, to a device for hot water supply, heating and cooling by using solar defrosting and an air heat source, and a control method thereof.
Background
In the Chinese patent database, a solar energy and air energy coupled hot water, heating and refrigerating system is disclosed, and the publication number is: CN210089035U; publication date: 20200218; the device comprises a solar heat collection system, a heat storage water tank, an air source heat pump cooling and heating unit, a fan coil tail end system, a floor heating coil tail end system and a controller; the heat storage and exchange water tank comprises a shell, an inner container, a heat preservation layer, a cold water inlet, a hot water outlet, a solar circulating water supply interface, a solar circulating water return interface, a heat pump circulating water supply interface, a heat pump circulating water outlet interface and a water temperature probe, wherein the cold water inlet, the hot water outlet, the solar circulating water supply interface, the solar circulating water return interface, the heat pump circulating water supply interface, the heat pump circulating water outlet interface and the water temperature probe are arranged on the inner container and penetrate through the heat preservation layer and the shell, a first coil and a second coil which is arranged above the first coil are arranged in the inner container, two ends of the first coil are respectively communicated with the solar circulating water supply interface and the solar circulating water return interface, and two ends of the second coil are respectively communicated with the heat pump circulating water supply interface and the heat pump circulating water outlet interface. When the temperature of the solar heat collector is high, the device is directly connected in series to the heating loop, the solar heat collector continuously improves the heating backwater temperature, reduces the energy consumption of the heat pump host, and improves the utilization rate of solar energy. The defects are that: the domestic hot water prepared by the device has low temperature, and when the hot water is used, the hot water is mutually interfered with water for refrigeration and heating, so that the water use experience is poor; the heat energy utilization efficiency is not high enough.
Disclosure of Invention
The invention aims to provide an air source heat pump heating, hot water and refrigerating system method for solar defrosting, which can supply hot water, heat, refrigerate and store energy, and the working modes have small interference; the defrosting is convenient, heat recovery can be realized during refrigeration in summer, and heat energy can be efficiently utilized.
The purpose of the invention is realized in the following way: a heating, hot water and refrigerating system of a solar defrosting air source heat pump and a control method thereof comprise an air source heat pump unit, a solar heat collector, a heat pump assembly, a heat storage water tank and a living water tank;
the solar heat collector is a pressure-bearing heat collector; the solar heat collector is provided with a heat collector water inlet and a heat collector water outlet;
the air source heat pump unit is provided with a heat pump water inlet and a heat pump water outlet, the heat pump water inlet is connected with an outlet of a heat pump circulating pump, an inlet of the heat pump circulating pump is divided into two paths through a three-way shunt pipe, the three-way shunt pipe comprises a section of straight-through pipeline with the diameter firstly contracted and then expanded, a three-way port is arranged on a pipe section with the contracted diameter, and the three-way port is connected with a heat collector water outlet of a solar heat collector through a first electromagnetic valve; one end of the straight-through pipeline is connected with a water tank water outlet on the heat storage water tank, and the other end of the straight-through pipeline is connected with an inlet of the heat pump circulating pump; the water outlet of the heat pump is divided into two paths, one path is connected with the water inlet of the water tank on the heat storage water tank, and the other path is connected with the water inlet of the solar heat collector;
the heat storage water tank is provided with a cold and warm water supply port and a cold and warm water return port, and the cold and warm water supply port and the cold and warm water return port are connected with indoor refrigeration or heating terminal equipment through a cold and warm circulating pump; a heat exchange coil is arranged in the heat storage water tank; one end of the heat exchange coil is provided with a coil inlet, and the other end is provided with a coil outlet;
the heat pump assembly comprises a compressor and an electronic expansion valve, and an outlet of the compressor is connected with a heat exchanger inlet of a water tank heat exchanger arranged in the living water tank; the outlet of the heat exchanger of the water tank heat exchanger is connected with the inlet of the coil pipe through an electronic expansion valve; the outlet of the coil pipe is connected with the inlet of the compressor;
the domestic water tank is provided with a domestic hot water pipe and a water supplementing pipe.
Further, a temperature sensor T1 is arranged on the living water tank, a temperature sensor T2 is arranged on the heat storage water tank, a temperature sensor T4 is arranged at the water inlet position of the water tank, and a temperature sensor T3 is arranged at the water outlet position of the heat collector; the detected temperature values are correspondingly recorded as t1, t2, t4 and t3, and the control mode is changed through the detected temperature signals, so that the conversion of the working modes of hot water supply, heating, refrigeration, energy storage and the like is realized.
According to the air source heat pump heating, hot water and refrigerating system with the solar defrosting function, the inlet of the heat pump circulating pump is connected with the water outlet of the heat collector and the water outlet of the water tank through the three-way shunt pipe, and the second electromagnetic valve is arranged between the water outlet of the water tank and the three-way shunt pipe.
The control method of the solar defrosting air source heat pump heating, hot water and refrigerating system has the following working modes:
1) Refrigerating and heating mode
In the mode, the air source heat pump unit, the heat storage water tank and the indoor refrigeration or heating terminal equipment participate in working, and the first electromagnetic valve is closed:
the air source heat pump unit and the cooling and heating circulating pump are started and closed according to the tail end signals of the internal refrigeration or heating terminal equipment, the refrigeration or heating mode is automatically operated, the air source heat pump unit and the heat pump circulating pump are operated in a linkage mode, water in the heat storage water tank is prepared to a set temperature, and the cooling and heating circulating pump conveys the water in the heat storage water tank to the indoor refrigeration or heating terminal equipment for refrigeration or heating and then returns to the heat storage water tank; the continuous circulation is realized, so that indoor refrigeration or heating is realized;
2) Mode of heating water
Including sub-mode one and sub-mode two, wherein,
sub-mode one: solar hot water mode
In the mode, a first electromagnetic valve is opened, an electronic expansion valve is opened, and a living water tank, a solar heat collector, a heat pump assembly and a heat pump circulating pump participate in working:
at the moment, the heat pump circulating pump works, hot water of the solar heat collector is brought into the circulating loop through the tee branch flow pipe, the heat storage and exchange water tank is continuously heated, meanwhile, the compressor works, high-temperature and high-pressure refrigerant at the outlet of the compressor enters the water tank heat exchanger in the living water tank and exchanges heat with water in the living water tank, so that the temperature of the living water rises, the refrigerant cools and condenses into high-pressure liquid, the refrigerant evaporates and absorbs heat in the heat exchange coil after passing through the electronic expansion valve, then enters the compressor again through the coil outlet, one working cycle is completed, and in the process, heat energy in the heat storage and exchange water tank is transferred into the living water tank, so that the water temperature in the living water tank reaches the use requirement;
sub-mode two: hot water mode of heat pump
In the mode, a first electromagnetic valve is closed, an electronic expansion valve is opened, and a living water tank, a heat pump assembly and an air source heat pump unit participate in working:
at the moment, the air source heat pump unit and the heat pump circulating pump work, and heat energy in the air is converted into the heat storage water tank through the air source heat pump unit; meanwhile, the compressor works, the high-temperature and high-pressure refrigerant at the outlet of the compressor enters a water tank heat exchanger in a living water tank and exchanges heat with water in the living water tank, so that the temperature of the living water rises, the refrigerant cools and condenses into high-pressure liquid, the high-pressure liquid passes through an electronic expansion valve and then evaporates in a heat exchange coil to absorb heat, and then enters the compressor again through a coil outlet to complete a working cycle, and in the process, the heat energy in the heat storage water tank is transferred into the living water tank, so that the water temperature in the living water tank reaches the use requirement;
3) Refrigeration heat recovery mode
In this mode, the electronic expansion valve is opened; the domestic water tank, the heat storage water tank, the heat pump assembly and the indoor refrigeration or heating terminal equipment participate in working, and the indoor is in a refrigeration state:
at the moment, the cold-hot circulating pump works, cold water is conveyed to indoor refrigeration or heating terminal equipment for refrigeration, and water after heat absorption flows back to the heat storage water tank; meanwhile, the compressor works, the high-temperature and high-pressure refrigerant at the outlet of the compressor enters a water tank heat exchanger in a living water tank and exchanges heat with water in the living water tank, so that the temperature of the living water rises, the refrigerant cools and condenses into high-pressure liquid, the high-pressure liquid passes through an electronic expansion valve and then evaporates in a heat exchange coil to absorb heat, and then the refrigerant passes through a coil outlet and then enters the compressor to complete a working cycle; in the process, indoor heat is transferred to the living water tank through the heat storage water tank, so that the water temperature in the living water tank reaches the use requirement;
4) Energy storage mode
In the mode, the first electromagnetic valve and the heat pump circulating pump are started, two water inlets and two water outlets of the heat pump circulating pump are simultaneously carried out, water flows are mixed and then split, the heat of the solar heat collector is partially converted into the heat storage and exchange water tank, so that the water temperatures of the two water inlets and the heat storage and exchange water tank tend to be consistent, and the water temperatures of the solar heat collector and the heat storage and exchange water tank are continuously increased under the condition that the solar heat collector continuously absorbs solar heat energy, so that the energy storage purpose is achieved;
further, in the energy storage mode, the compressor works, and heat in the heat storage water tank can be converted into the living water tank, so that the water temperature in the heat storage water tank can reach the use requirement.
5) Solar defrosting mode
In the mode, the air source heat pump unit is changed from heating operation to refrigerating operation, and meanwhile, the first electromagnetic valve and the heat pump circulating pump are started, hot water in the solar heat collector enters the air source heat pump unit, and defrosting is carried out on the air source heat pump unit.
Under energy storage mode and solar defrosting mode, open first solenoid valve and heat pump circulating pump, when the water flow passes through the flow cross section that the tee bend shunt tubes reduces, the phenomenon that the velocity of flow increases appears, its velocity of flow is inversely proportional to the flow cross section, and the increase of velocity of flow follows the reduction of fluid pressure by Bernoulli's law can know, thereby produce venturi phenomenon, the differential pressure that produces here plays the drainage effect, can increase solar collector's flow, can be better mix solar collector's water and the circulating water of air source heat pump unit, thereby with solar collector's heat transfer to air source heat pump unit's fluorine water heat exchanger and heat storage water tank, and then realize solar defrosting and solar water heating's function.
Further, in the solar defrosting mode, a second electromagnetic valve arranged between the water outlet of the water tank and the three-way shunt pipe is in a closed state. The setting of second solenoid valve is not necessary, and its not setting or under the condition of normally opening, defrosting operation can make the buffer tank temperature decline, and when the second solenoid valve was closed, does not influence buffer tank temperature, and user experience is better.
Further, the present invention may set the temperature control values of t1-t4 to trigger different modes of operation under specific conditions, the temperature values being adjustable and not limited to specific values. The settings may be as follows:
heating water mode:
in the non-water period, when the temperature t1 of the living water tank is less than 60 ℃ and the temperature t2 of the heat storage water tank is more than or equal to 10 ℃, starting a water heating mode, and when the temperature t1 of the living water tank is more than or equal to 65 ℃ or the temperature t2 of the heat storage water tank is less than 7 ℃, stopping the water heating mode;
in the water consumption period, when the temperature t1 of the living water tank is less than 45 ℃ and the temperature t2 of the heat storage water tank is less than 10 ℃, starting an air source heat pump unit, and heating the air source heat pump unit to operate, and when the temperature t1 of the living water tank is more than or equal to 65 ℃ or the temperature t2 of the heat storage water tank is more than or equal to 20 ℃, stopping a water heating mode; the air source heat pump unit is restored to the original refrigeration or heating mode.
Cooling and heat recovery mode:
when the indoor refrigeration or heating terminal equipment is started and the temperature t2 of the heat storage water tank is more than or equal to 10 ℃, a refrigeration heat recovery mode is started, and when the temperature t1 of the living water tank is more than or equal to 65 ℃ or the temperature t2 of the heat storage water tank is less than 7 ℃, the refrigeration heat recovery mode is closed.
In the energy storage mode:
in a non-refrigeration season, when the water outlet temperature t3 of the heat collector is less than or equal to 3 ℃ and the water inlet temperature t4 of the buffer water tank is less than or equal to 7 ℃ and the temperature t2 of the heat storage water tank is less than 55 ℃, the first electromagnetic valve and the heat pump circulating pump are started, and when the water outlet temperature t3 of the heat collector is less than or equal to 3 ℃ and the water inlet temperature t4 of the buffer water tank or the temperature t2 of the heat storage water tank is more than or equal to 55 ℃, the first electromagnetic valve and the heat pump circulating pump are closed;
when the linkage signal of indoor refrigeration or heating terminal equipment is disconnected in a refrigerating season, the temperature t1 of a living water tank is less than 60 ℃, the water outlet temperature t3 of a heat collector is more than or equal to 7 ℃ and the water inlet temperature t4 of a buffer water tank is less than 10 ℃, when the temperature t2 of a heat storage water tank is less than or equal to 10 ℃, a first electromagnetic valve and a heat pump circulating pump are started, and when the temperature t1 of the living water tank is more than or equal to 65 ℃ or the temperature t2 of the heat storage water tank is more than or equal to 20 ℃, the first electromagnetic valve is closed, and the heat pump circulating pump is closed.
Solar defrost mode:
one of the two defrosting situations can exist, the solar defrosting mode is operated when the air source heat pump unit frosts, the outlet water temperature t3 of the heat collector is higher than or equal to 3 ℃, the inlet water temperature t4 of the buffer water tank is higher than or equal to 3 ℃, after defrosting is finished or the outlet water temperature t3 of the heat collector is lower than 1 ℃, the first electromagnetic valve is closed, and the solar defrosting mode is exited. Secondly, the solar defrosting mode is operated when the air source heat pump unit frosts and the outlet water temperature t3 of the heat collector is more than or equal to 12 ℃, at the moment, the first electromagnetic valve is opened, the second electromagnetic valve is closed, after defrosting is finished or the outlet water temperature t3 of the heat collector is less than 7 ℃, the first electromagnetic valve is closed, the second electromagnetic valve is opened, and the solar defrosting mode is exited.
Compared with the prior art, the invention has the beneficial effects that: the device can realize heat recovery in summer refrigeration, increase refrigeration effect, obtain free domestic hot water at the same time, and remarkably reduce operation energy consumption; the defrosting device can defrost by utilizing the heat energy of solar energy, and has high defrosting speed and good defrosting effect; the device can realize the works of supplying hot water, heating, refrigerating, storing energy and the like, and the domestic hot water and the refrigerating and heating water are isolated through the two water tanks, so that the interference between the working modes is small, and the user experience is better; the defrosting is convenient, heat recovery can be realized during refrigeration in summer, and heat energy can be efficiently utilized.
Drawings
Fig. 1 is a schematic diagram of the operation of the present invention.
Fig. 2 is another working principle diagram of the present invention.
In the figure, 1 an air source heat pump unit; 101 a heat pump water inlet; 102, a heat pump water outlet; 2 a solar collector; 201 collector inlet; 202 a collector water outlet; 3 a heat pump assembly; 301 a compressor; 303 electronic expansion valve; 4, a heat storage and exchange water tank; 401 heat exchange coil; 402 coil inlet; 403 coil outlet; 404 water inlet of water tank, 405 water outlet of water tank, 407 cold and warm water supply port; 408 cold and warm water return ports; 5, a living water tank; 501 a water tank heat exchanger; 502 heat exchanger inlet; 503 heat exchanger outlet; 6 a heat pump circulating pump; 7 a cooling and heating circulating pump; 10, a water pipe for domestic hot water; 11 water supplementing pipes; a 12-way shunt tube; v1 a first electromagnetic valve; v2 second solenoid valve.
Description of the embodiments
Examples
As shown in FIG. 1, the heating, hot water and refrigerating system of the air source heat pump for defrosting by solar energy and the control method thereof comprise an air source heat pump unit 1, a solar heat collector 2, a heat pump assembly 3, a heat storage water tank 4 and a living water tank 5;
the solar heat collector 2 is a pressure-bearing heat collector; the solar heat collector 2 is provided with a heat collector water inlet 201 and a heat collector water outlet 202;
the air source heat pump unit 1 is provided with a heat pump water inlet 101 and a heat pump water outlet 102, the heat pump water inlet 101 is connected with an outlet of the heat pump circulating pump 6, an inlet of the heat pump circulating pump 6 is divided into two paths through a three-way shunt pipe 12, the three-way shunt pipe 12 comprises a section of straight-through pipeline with the diameter firstly contracted and then enlarged, a three-way port is arranged on a pipe section with the reduced diameter, and the three-way port is connected with a collector water outlet 202 of the solar collector 2 through a first electromagnetic valve V1; one end of the straight-through pipeline is connected with a water tank water outlet 405 on the heat storage water tank 4, and the other end of the straight-through pipeline is connected with an inlet of the heat pump circulating pump 6; the heat pump water outlet 102 is divided into two paths, one path is connected with a water tank water inlet 404 on the heat storage water tank 4, and the other path is connected with a heat collector water inlet 201 of the solar heat collector 2;
the heat storage water tank 4 is provided with a cold and warm water supply port 407 and a cold and warm water return port 408, and the cold and warm water supply port 407 and the cold and warm water return port 408 are connected with indoor refrigeration or heating terminal equipment through a cold and warm circulating pump 7; a heat exchange coil 401 is arranged in the heat storage water tank 4; one end of the heat exchange coil 401 is provided with a coil inlet 402, and the other end is provided with a coil outlet 403;
the heat pump assembly 3 comprises a compressor 301 and an electronic expansion valve 303, wherein the outlet of the compressor 301 is connected with a heat exchanger inlet 502 of a water tank heat exchanger 501 arranged in the domestic water tank 5; the heat exchanger outlet 503 of the water tank heat exchanger 501 is connected with the coil inlet 402 through the electronic expansion valve 303; the coil outlet 403 is connected to the inlet of the compressor 301;
the domestic water tank 5 is provided with a domestic hot water pipe 10 and a water supplementing pipe 11.
A temperature sensor T1 is arranged on the living water tank 5, a temperature sensor T2 is arranged on the heat storage water tank 4, a temperature sensor T4 is arranged at the water inlet 404 position of the water tank, and a temperature sensor T3 is arranged at the water outlet 202 position of the heat collector; the detected temperature values are correspondingly recorded as t1, t2, t4 and t3, and the control mode is changed through the detected temperature signals, so that the conversion of the working modes of hot water supply, heating, refrigeration, energy storage and the like is realized.
The control method of the solar defrosting air source heat pump heating, hot water and refrigerating system comprises the following working modes:
1) Refrigerating and heating mode
In the mode, the air source heat pump unit 1, the heat storage water tank 4 and indoor refrigeration or heating terminal equipment participate in working, and the first electromagnetic valve is closed:
the air source heat pump unit 1 and the cold and warm circulating pump 7 are turned on and off according to the tail end signals of the internal refrigeration or heating terminal equipment, the refrigeration or heating mode is automatically operated, the air source heat pump unit 1 and the heat pump circulating pump 6 are operated in a linkage manner, water in the heat storage water tank 4 is prepared to a set temperature, and the cold and warm circulating pump 7 conveys the water in the heat storage water tank 4 to the indoor refrigeration or heating terminal equipment for refrigeration or heating and then returns to the heat storage water tank 4; the continuous circulation is realized, so that indoor refrigeration or heating is realized;
2) Mode of heating water
Including sub-mode one and sub-mode two, wherein,
sub-mode one: solar hot water mode
In this mode, the first solenoid valve V1 is opened, the electronic expansion valve 303 is opened, and the living water tank 5, the solar heat collector 2, the heat pump assembly 3, and the heat pump circulation pump 6 participate in the work:
at this time, the heat pump circulation pump 6 works, hot water of the solar heat collector 2 is brought into the circulation loop through the three-way shunt tube 12, and then the heat storage and exchange water tank 4 is continuously heated, meanwhile, the compressor 301 works, a high-temperature and high-pressure refrigerant at the outlet of the compressor enters the water tank heat exchanger 501 in the living water tank 5, after heat exchange with water in the living water tank 5, the temperature of the living water rises, the temperature of the refrigerant is reduced and condensed into high-pressure liquid, after passing through the electronic expansion valve 303, the refrigerant evaporates and absorbs heat in the heat exchange coil 401, and then enters the compressor through the coil outlet 403, so that one working cycle is completed, and in the process, the heat energy in the heat storage and exchange water tank 4 is transferred into the living water tank 5, so that the water temperature in the living water tank 5 meets the use requirement;
sub-mode two: hot water mode of heat pump
In this mode, the first solenoid valve V1 is closed, the electronic expansion valve 303 is opened, and the living water tank 5, the heat pump assembly 3, and the air source heat pump unit 1 participate in the work:
at the moment, the air source heat pump unit 1 and the heat pump circulating pump 6 work, and heat energy in the air is converted into the heat storage water tank 4 through the air source heat pump unit 1; meanwhile, the compressor 301 works, the high-temperature and high-pressure refrigerant at the outlet of the compressor enters a water tank heat exchanger 501 in the living water tank 5 and exchanges heat with water in the living water tank 5, so that the temperature of the living water rises, the refrigerant cools and condenses into high-pressure liquid, the high-pressure liquid is evaporated and absorbs heat in the heat exchange coil 401 after passing through the electronic expansion valve 303, and then enters the compressor again through the coil outlet 403 to complete a working cycle, and in the process, the heat energy in the heat storage water tank 4 is transferred into the living water tank 5, so that the water temperature in the living water tank 5 meets the use requirement;
3) Refrigeration heat recovery mode
In this mode, the electronic expansion valve 303 is opened; the living water tank 5, the heat storage water tank 4, the heat pump assembly 3 and indoor refrigeration or heating terminal equipment participate in working, and the indoor is in a refrigeration state:
at this time, the cold-hot circulating pump 7 works to convey cold water to indoor refrigeration or heating terminal equipment for refrigeration, and the water after absorbing heat flows back to the heat storage water tank 4; meanwhile, the compressor 301 works, the high-temperature and high-pressure refrigerant at the outlet of the compressor enters a water tank heat exchanger 501 in the living water tank 5, after exchanging heat with water in the living water tank, the temperature of the living water rises, the refrigerant cools and condenses into high-pressure liquid, the high-pressure liquid passes through an electronic expansion valve 303, the refrigerant evaporates and absorbs heat in a heat exchange coil 401, and then the refrigerant enters the compressor after passing through a coil outlet 403, so that one working cycle is completed; in the process, indoor heat is transferred to the living water tank 5 through the heat storage water tank 4, so that the water temperature in the living water tank 5 reaches the use requirement;
4) Energy storage mode
In the mode, the first electromagnetic valve V1 and the heat pump circulating pump 6 are started, two water inflow ways and two water outflow ways of the heat pump circulating pump 6 are simultaneously carried out, water flows are split after being mixed, the heat of the solar heat collector 2 is partially converted into the heat storage water tank 4, the water temperatures of the two water inflow ways and the heat storage water tank are enabled to be consistent, and under the condition that the solar heat collector 2 continuously absorbs solar heat energy, the water temperatures of the solar heat collector 2 and the heat storage water tank 4 continuously rise, so that the energy storage purpose is achieved;
in the energy storage mode, further, the compressor 301 works to convert the heat in the heat storage water tank 4 into the living water tank 5, so that the water temperature in the heat storage water tank 4 can meet the use requirement.
5) Solar defrosting mode
In the mode, the air source heat pump unit 1 is changed from heating operation to cooling operation, and meanwhile, the first electromagnetic valve V1 and the heat pump circulating pump 6 are started, hot water in the solar heat collector 2 enters the air source heat pump unit 1, and defrosting is carried out on the air source heat pump unit 1.
Further, the present invention may set the temperature control values of t1-t4 to trigger different modes of operation under specific conditions, the temperature values being adjustable and not limited to specific values. The settings are as follows:
heating water mode:
in the non-water period, when the temperature t1 of the living water tank is less than 60 ℃ and the temperature t2 of the heat storage water tank is more than or equal to 10 ℃, starting a water heating mode, and when the temperature t1 of the living water tank is more than or equal to 65 ℃ or the temperature t2 of the heat storage water tank is less than 7 ℃, stopping the water heating mode;
in the water consumption period, when the temperature t1 of the living water tank is less than 50 ℃ and the temperature t2 of the heat storage water tank is less than 10 ℃, starting the air source heat pump unit 1, and when the temperature t1 of the living water tank is more than or equal to 65 ℃ or the temperature t2 of the heat storage water tank is more than or equal to 25 ℃, stopping the heating water mode; the air source heat pump unit 1 is restored to the original air conditioning cooling or heating mode.
Cooling and heat recovery mode:
when the indoor refrigeration or heating terminal equipment is started and the temperature t2 of the heat storage water tank is more than or equal to 10 ℃, a refrigeration heat recovery mode is started, and when the temperature t1 of the living water tank is more than or equal to 65 ℃ or the temperature t2 of the heat storage water tank is less than 7 ℃, the refrigeration heat recovery mode is closed.
In the energy storage mode:
in non-refrigeration seasons, when the water outlet temperature t3 of the heat collector is lower than or equal to 3 ℃ and the water inlet temperature t4 of the buffer water tank is higher than or equal to 7 ℃ and the temperature t2 of the heat storage water tank is lower than 55 ℃, the first electromagnetic valve V1 and the heat pump circulating pump 6 are started, and when the water outlet temperature t3 of the heat collector is lower than or equal to 3 ℃ and the water inlet temperature t4 of the buffer water tank or the temperature t2 of the heat storage water tank is higher than or equal to 55 ℃, the first electromagnetic valve V1 and the heat pump circulating pump 6 are closed;
when the linkage signal of indoor refrigeration or heating terminal equipment is disconnected in a refrigerating season, the temperature t1 of a living water tank is less than 60 ℃, the water outlet temperature t3 of a heat collector is more than or equal to 7 ℃ and the water inlet temperature t4 of a buffer water tank is less than or equal to 10 ℃, when the temperature t2 of a heat storage water tank is less than or equal to 10 ℃, a first electromagnetic valve V1 and a heat pump circulating pump 6 are opened, and when the temperature t1 of the living water tank is more than or equal to 65 ℃ or the temperature t2 of the heat storage water tank is more than or equal to 20 ℃, the first electromagnetic valve V1 is closed, and the heat pump circulating pump 6 is closed.
Solar defrost mode:
the solar defrosting mode is operated when the air source heat pump unit frosts and the outlet water temperature t3 of the heat collector is higher than or equal to 3 ℃ and the inlet water temperature t4 of the buffer water tank is lower than 1 ℃, the first electromagnetic valve (V1) is closed after defrosting is finished or the outlet water temperature t3 of the heat collector is higher than or equal to 3 ℃ and the solar defrosting mode is exited.
The different control temperatures are only one specific control amount, and the control amount can be reset as needed.
Examples
As shown in fig. 2, the heating, hot water and refrigerating system of the air source heat pump for defrosting by using solar energy is different from the embodiment 1 in that in the device, the inlet of the heat pump circulation pump 6 is connected with the collector water outlet 202 and the water tank water outlet 405 through the three-way shunt pipe 12, and the second electromagnetic valve V2 is arranged between the water tank water outlet 405 and the three-way shunt pipe 12.
In the solar defrosting mode, when the second electromagnetic valve V2 is closed, the water temperature in the heat storage water tank is not influenced. The solar defrosting mode is operated when the air source heat pump unit frosts and the outlet temperature t3 of the heat collector is more than or equal to 12 ℃, at the moment, the first electromagnetic valve V1 is opened, the second electromagnetic valve V2 is closed, after defrosting is finished or the outlet temperature t3 of the heat collector is less than 7 ℃, the first electromagnetic valve V1 is closed, the second electromagnetic valve V2 is opened, and the solar defrosting mode is exited.
According to the device, under the energy storage mode and the solar defrosting mode, the first electromagnetic valve and the heat pump circulating pump are started, when water flows through the flow cross section reduced by the tee junction shunt pipe, the phenomenon of flow velocity increase occurs, the flow velocity is inversely proportional to the flow cross section, the increase of the flow velocity is known to be accompanied with the decrease of fluid pressure by Bernoulli's law, so that venturi phenomenon is generated, the pressure difference generated at the venturi phenomenon is generated, the drainage effect is achieved, the flow of the solar heat collector can be increased, water of the solar heat collector can be better mixed with water circulated by the air source heat pump unit, and accordingly heat of the solar heat collector is transferred to the fluorine water heat exchanger and the heat storage water tank of the air source heat pump unit, and the functions of solar defrosting and solar water heating are achieved.
The invention is not limited to the above embodiments, and based on the technical solution disclosed in the invention, a person skilled in the art may make some substitutions and modifications to some technical features thereof without creative effort according to the technical content disclosed, and all the substitutions and modifications are within the protection scope of the invention.
Claims (9)
1. The utility model provides an air source heat pump heating, hot water, refrigerating system of solar energy defrosting, includes air source heat pump set (1), solar collector (2), heat pump assembly (3), heat storage water tank (4) and living water tank (5), its characterized in that:
the solar heat collector (2) is a pressure-bearing heat collector; a collector water inlet (201) and a collector water outlet (202) are arranged on the solar collector (2);
the air source heat pump unit (1) is provided with a heat pump water inlet (101) and a heat pump water outlet (102), the heat pump water inlet (101) is connected with an outlet of a heat pump circulating pump (6), an inlet of the heat pump circulating pump (6) is divided into two paths through a three-way shunt pipe (12), the three-way shunt pipe (12) comprises a section of straight-through pipeline with the diameter firstly contracted and then expanded, a three-way port is arranged on a pipe section with the contracted diameter, and the three-way port is connected with a heat collector water outlet (202) of the solar heat collector (2) through a first electromagnetic valve (V1); one end of the straight-through pipeline is connected with a water tank water outlet (405) on the heat storage water tank (4), and the other end of the straight-through pipeline is connected with an inlet of the heat pump circulating pump (6); the heat pump water outlet (102) is divided into two paths, one path is connected with a water tank water inlet (404) on the heat storage water tank (4), and the other path is connected with a heat collector water inlet (201) of the solar heat collector (2);
the heat storage water tank (4) is provided with a cold and warm water supply port (407) and a cold and warm water return port (408), and the cold and warm water supply port (407) and the cold and warm water return port (408) are connected with indoor refrigeration or heating terminal equipment through a cold and warm circulating pump (7); a heat exchange coil (401) is arranged in the heat storage water tank (4); one end of the heat exchange coil (401) is provided with a coil inlet (402), and the other end is provided with a coil outlet (403);
the heat pump assembly (3) comprises a compressor (301) and an electronic expansion valve (303), wherein an outlet of the compressor (301) is connected with a heat exchanger inlet (502) of a water tank heat exchanger (501) arranged in the living water tank (5); a heat exchanger outlet (503) of the water tank heat exchanger (501) is connected with a coil inlet (402) through an electronic expansion valve (303); the coil outlet (403) is connected to the inlet of the compressor (301);
a domestic hot water pipe (10) and a water supplementing pipe (11) are arranged on the domestic water tank (5);
the control method comprises the following working modes:
1) Refrigerating and heating mode
In the mode, the air source heat pump unit (1), the heat storage water tank (4) and the indoor refrigeration or heating terminal equipment participate in working, and the first electromagnetic valve is closed:
the air source heat pump unit (1) and the cooling and heating circulating pump (7) are opened and closed according to the tail end signals of the internal refrigeration or heating terminal equipment, the air source heat pump unit (1) and the heat pump circulating pump (6) operate in a linkage mode, water in the heat storage water tank (4) is prepared to a set temperature, and the cooling and heating circulating pump (7) conveys the water in the heat storage water tank (4) to the indoor refrigeration or heating terminal equipment for refrigeration or heating and then returns to the heat storage water tank (4); the continuous circulation is realized, so that indoor refrigeration or heating is realized;
2) Mode of heating water
Including sub-mode one and sub-mode two, wherein,
sub-mode one: solar hot water mode
In the mode, a first electromagnetic valve (V1) is opened, an electronic expansion valve (303) is opened, and a living water tank (5), a solar heat collector (2), a heat pump assembly (3) and a heat pump circulating pump (6) participate in working:
at the moment, the heat pump circulating pump (6) works, hot water of the solar heat collector (2) is brought into a circulating loop through the three-way shunt tube (12), the heat storage and exchange water tank (4) is further heated continuously, meanwhile, the compressor (301) works, high-temperature and high-pressure refrigerant at the outlet of the compressor enters the water tank heat exchanger (501) in the living water tank (5) and exchanges heat with water in the living water tank (5), so that the temperature of the living water rises, the refrigerant cools and condenses into high-pressure liquid by itself, and after passing through the electronic expansion valve (303), the refrigerant evaporates and absorbs heat in the heat exchange coil (401), then enters the compressor through the coil outlet (403), and a working cycle is completed, and in the process, the heat energy in the heat storage and exchange water tank (4) is transferred into the living water tank (5), so that the water temperature in the living water tank (5) meets the use requirement;
sub-mode two: hot water mode of heat pump
In the mode, a first electromagnetic valve (V1) is closed, an electronic expansion valve (303) is opened, and a living water tank (5), a heat pump assembly (3) and an air source heat pump unit (1) participate in working:
at the moment, the air source heat pump unit (1) and the heat pump circulating pump (6) work, and heat energy in the air is converted into the heat storage water tank (4) through the air source heat pump unit (1); meanwhile, the compressor (301) works, high-temperature and high-pressure refrigerant at the outlet of the compressor enters a water tank heat exchanger (501) in the living water tank (5) to exchange heat with water in the living water tank (5), so that the temperature of the living water rises, the refrigerant cools and condenses into high-pressure liquid, the high-pressure liquid is evaporated and absorbs heat in a heat exchange coil (401) after passing through an electronic expansion valve (303), and then the refrigerant enters the compressor through a coil outlet (403) to complete a working cycle, and in the process, heat energy in the heat storage water tank (4) is transferred into the living water tank (5) to enable the water temperature in the living water tank (5) to reach the use requirement;
3) Refrigeration heat recovery mode
In this mode, the electronic expansion valve (303) is opened; the domestic water tank (5), the heat storage water tank (4), the heat pump assembly (3) and the indoor refrigeration or heating terminal equipment participate in working, and the indoor is in a refrigeration state:
at the moment, the cold-hot circulating pump (7) works, cold water is conveyed to indoor refrigeration or heating terminal equipment for refrigeration, and water after heat absorption flows back to the heat storage water tank (4); meanwhile, the compressor (301) works, high-temperature and high-pressure refrigerant at the outlet of the compressor enters a water tank heat exchanger (501) in a living water tank (5) to exchange heat with water in the living water tank, so that the temperature of the living water rises, the refrigerant cools and condenses into high-pressure liquid, the high-pressure liquid passes through an electronic expansion valve (303) and then evaporates and absorbs heat in a heat exchange coil (401), and then the refrigerant enters the compressor after passing through a coil outlet (403) to complete a working cycle; in the process, indoor heat is transferred to the living water tank (5) through the heat storage water tank (4), so that the water temperature in the living water tank (5) reaches the use requirement;
4) Energy storage mode
In the mode, a first electromagnetic valve (V1) and a heat pump circulating pump (6) are opened, two paths of water inflow and two paths of water outflow of the heat pump circulating pump (6) are simultaneously carried out, water flows are mixed and then split, the heat of the solar heat collector (2) is partially converted into the heat storage water tank (4), the water temperatures of the two paths of water are enabled to be consistent, and under the condition that the solar heat collector (2) continuously absorbs solar heat energy, the water temperatures of the solar heat collector (2) and the heat storage water tank (4) continuously rise, so that the purpose of energy storage is achieved;
5) Solar defrosting mode
In the mode, the air source heat pump unit (1) is changed from heating operation to refrigerating operation, and meanwhile, the first electromagnetic valve (V1) and the heat pump circulating pump (6) are opened, hot water in the solar heat collector (2) enters the air source heat pump unit (1), and defrosting is carried out on the air source heat pump unit (1).
2. The solar defrost air source heat pump heating, hot water, refrigeration system of claim 1, wherein: the domestic water tank (5) is provided with a temperature sensor T1, the heat storage water tank (4) is provided with a temperature sensor T2, the water inlet (404) of the water tank is provided with a temperature sensor T4, and the water outlet (202) of the heat collector is provided with a temperature sensor T3.
3. The solar defrost air source heat pump heating, hot water, refrigeration system of claim 2, wherein: an inlet of the heat pump circulating pump (6) is connected with a heat collector water outlet (202) and a water tank water outlet (405) through a three-way shunt pipe (12), and a second electromagnetic valve (V2) is arranged between the water tank water outlet (405) and the three-way shunt pipe (12).
4. A solar defrost air source heat pump heating, hot water, refrigeration system according to any one of claims 1-3, characterized in that: in the solar defrosting mode, a second electromagnetic valve (V2) arranged between the water outlet (405) of the water tank and the three-way shunt pipe (12) is in a closed state.
5. The solar defrost air source heat pump heating, hot water, refrigeration system of claim 1, wherein: in the mode of heating water, the water is heated,
in the non-water period, when the temperature t1 of the living water tank is less than 60 ℃ and the temperature t2 of the heat storage water tank is more than or equal to 10 ℃, starting a water heating mode, and when the temperature t1 of the living water tank is more than or equal to 65 ℃ or the temperature t2 of the heat storage water tank is less than 7 ℃, stopping the water heating mode;
in the water consumption period, when the temperature t1 of the living water tank is less than 45 ℃ and the temperature t2 of the heat storage water tank is less than 10 ℃, starting the air source heat pump unit (1), and when the temperature t1 of the living water tank is more than or equal to 65 ℃ or the temperature t2 of the heat storage water tank is more than or equal to 20 ℃, stopping the heating water mode; the air source heat pump unit (1) is restored to the original refrigeration or heating mode.
6. The solar defrost air source heat pump heating, hot water, refrigeration system of claim 1, wherein: when the indoor refrigeration or heating terminal equipment is started and the temperature t2 of the heat storage and exchange water tank is more than or equal to 10 DEG C，And starting a refrigeration heat recovery mode, and closing the refrigeration heat recovery mode when the temperature t1 of the living water tank is more than or equal to 65 ℃ or the temperature t2 of the heat storage water tank is less than 7 ℃.
7. The solar defrost air source heat pump heating, hot water, refrigeration system of claim 1, wherein: in the energy storage mode
In a non-refrigeration season, when the water outlet temperature t3 of the heat collector is lower than or equal to 7 ℃ and the water inlet temperature t4 of the buffer water tank is lower than or equal to 55 ℃, the first electromagnetic valve (V1) and the heat pump circulating pump (6) are opened, and when the water outlet temperature t3 of the heat collector is lower than or equal to 3 ℃ and the water inlet temperature t4 of the buffer water tank is lower than or equal to 3 ℃ or the water inlet temperature t2 of the heat storage water tank is higher than or equal to 55 ℃, the first electromagnetic valve (V1) and the heat pump circulating pump (6) are closed;
when the linkage signal of indoor refrigeration or heating terminal equipment is disconnected in a refrigerating season, the temperature t1 of a living water tank is less than 60 ℃, the water outlet temperature t3 of a heat collector is more than or equal to 7 ℃, the water inlet temperature t4 of a buffer water tank is more than or equal to 7 ℃, the temperature t2 of a heat storage water tank is less than 10 ℃, a first electromagnetic valve (V1) and a heat pump circulating pump (6) are opened, and when the temperature t1 of the living water tank is more than or equal to 65 ℃ or the temperature t2 of the heat storage water tank is more than or equal to 20 ℃, the first electromagnetic valve (V1) is closed, and the heat pump circulating pump (6) is closed.
8. The solar defrost air source heat pump heating, hot water, refrigeration system of claim 1, wherein: the solar defrosting mode is operated when the air source heat pump unit frosts and the outlet water temperature t3 of the heat collector is higher than or equal to 3 ℃ and the inlet water temperature t4 of the buffer water tank is lower than 1 ℃, the first electromagnetic valve (V1) is closed after defrosting is finished or the outlet water temperature t3 of the heat collector is higher than or equal to 3 ℃ and the solar defrosting mode is exited.
9. The solar defrost air source heat pump heating, hot water, refrigeration system of claim 1, wherein: the solar defrosting mode is operated when the air source heat pump unit frosts and the outlet water temperature t3 of the heat collector is more than or equal to 12 ℃, at the moment, the first electromagnetic valve (V1) is opened, the second electromagnetic valve (V2) is closed, after defrosting is finished or the outlet water temperature t3 of the heat collector is less than 7 ℃, the first electromagnetic valve (V1) is closed, the second electromagnetic valve (V2) is opened, and the solar defrosting mode is exited.
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