CN106016771A - Solar air source heat pump triple co-generation system and control method thereof - Google Patents
Solar air source heat pump triple co-generation system and control method thereof Download PDFInfo
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- CN106016771A CN106016771A CN201610559985.0A CN201610559985A CN106016771A CN 106016771 A CN106016771 A CN 106016771A CN 201610559985 A CN201610559985 A CN 201610559985A CN 106016771 A CN106016771 A CN 106016771A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S50/00—Arrangements for controlling solar heat collectors
- F24S50/40—Arrangements for controlling solar heat collectors responsive to temperature
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D3/00—Hot-water central heating systems
- F24D3/005—Hot-water central heating systems combined with solar energy
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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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B29/00—Combined heating and refrigeration systems, e.g. operating alternately or simultaneously
- F25B29/003—Combined heating and refrigeration systems, e.g. operating alternately or simultaneously of the compression type system
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- 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
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D2200/00—Heat sources or energy sources
- F24D2200/12—Heat pump
- F24D2200/123—Compression type heat pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D2200/00—Heat sources or energy sources
- F24D2200/14—Solar energy
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/40—Solar thermal energy, e.g. solar towers
- Y02E10/44—Heat exchange systems
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Steam Or Hot-Water Central Heating Systems (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
The invention discloses a solar air source heat pump triple co-generation system and a control method thereof. The solar air source heat pump triple co-generation system comprises a solar heat collecting evaporator unit, an air source heat pump host unit, a hot water unit and an indoor tail end unit, wherein the solar heat collecting evaporator unit, the hot water unit and the indoor air conditioner tail end unit are connected with the air source heat pump host unit. By means of the above manner, the solar air source heat pump triple co-generation system and the control method thereof can achieve three major functions including efficient heat supply, refrigerating and water heating and any combination of the three major functions, solar energy or an air source can serve as a low-temperature source to supply heat or heat water to an indoor part, and water heating is achieved while indoor refrigerating is achieved in summer. The system has a high comprehensive energy efficiency ratio, the system can be unlimited by the weather, and continuous, stable and efficient running is achieved.
Description
Technical field
The present invention relates to solar heat pump technical field, particularly relate to a kind of solar air source heat pumps combined supply system and control method thereof.
Background technology
The a large amount of of the Fossil fuels such as coal, oil, natural gas use and exhaustive exploitation, cause serious environmental pollution and energy scarcity.Environmental pollution and energy scarcity problem have become the cardinal task threatening human survival, and the exploitation to clean energy resource are just particularly important.
Solar energy owing to being affected greatly by weather, poor continuity, cannot be properly functioning at overcast and rainy and night, thus limit solar energy application in heating or water heating.
Though air source heat pump is overcast and rainy or can run the most continuously night, but its Energy Efficiency Ratio is relatively low compared with solar heat pump, and operating cost is compared higher.
Some Patents that are open in recent years and that authorize: patent of invention " realizing building integrated solar air source source pump " (application number: 200910028142.8；Authorization Notice No.: CN101498528B), " solar air source heat pumps air conditioning system " (application number: 201310693116.3；Publication number: CN103712367A), " a kind of solar air source heat pumps " (application number: 201511029273.X；Application notification number: CN105402966A) it is all that mutual for air source heat pump and regular solar two independent system is combined, the medium in solar thermal collector is water, and its photothermal conversion efficiency will be caused to reduce.
Given this, being necessary to provide a kind of solar air source heat pumps combined supply system, when solar heat pump condition, systematic energy efficiency ratio is the highest, and air source heat pump operating mode can overcome solar heat pump easily by the defect of environmental influence, safeguards system continuous and steady operation, improves system synthesis Energy Efficiency Ratio.
Summary of the invention
The technical problem that present invention mainly solves is to provide a kind of solar air source heat pumps combined supply system and control method thereof, it is capable of highly effective heating, refrigeration and water heating three zones and the combination in any of three zones, in the case of solar irradiation intensity is enough, system is with solar energy as low-temperature heat source as indoor heating or water heating, in the case of solar irradiation insufficient strength, system can be with air as low-temperature heat source as indoor heating or water heating, and summer can also be water heating while indoor refrigeration, system has higher comprehensive energy efficiency ratio, and system can not be limited by weather, realize continuous-stable to run efficiently.
For solving above-mentioned technical problem, the technical scheme that the present invention uses is: provide a kind of solar air source heat pumps combined supply system, including: solar energy heating evaporator unit, air source heat pump main computer unit, hot water unit, indoor end unit, solar energy heating evaporator unit, hot water unit and room conditioning terminal units are connected with air source heat pump main computer unit respectively.
In a preferred embodiment of the present invention, described solar energy heating evaporator unit includes: solar energy heating vaporizer and the first temperature sensor, and the first temperature sensor is arranged on the outlet main of the solar energy heating vaporizer that polylith is arranged in parallel.
In a preferred embodiment of the present invention, described air source heat pump main computer unit includes: compressor, the first plate type heat exchanger, four-way change-over valve, the second plate type heat exchanger, fluid reservoir, device for drying and filtering, the first electric expansion valve, the second electric expansion valve, the first check valve, the second check valve, the 3rd check valve, the 4th check valve, the 5th check valve, the first electromagnetic valve, the second electromagnetic valve, the 3rd electromagnetic valve, blower fan, air source fin-tube type heat exchanger, the second temperature sensor, three-temperature sensor and the 4th temperature sensor.
In a preferred embodiment of the present invention, the described arrival end of the 5th check valve is connected with the outlet main of solar energy heating vaporizer, and the port of export of the 5th check valve is connected with air source fin-tube type heat exchanger and the second electromagnetic valve simultaneously,
The other end of air source fin-tube type heat exchanger is connected with I interface end of four-way change-over valve, the II of four-way change-over valve, III, IV interface end is connected with air entry, the second plate type heat exchanger and first plate type heat exchanger of compressor respectively.
In a preferred embodiment of the present invention, the air vent of described compressor and another interface of the first plate type heat exchanger connect, and another interface of the second plate type heat exchanger is connected with the port of export, the arrival end of the 3rd check valve of the first check valve simultaneously,
The arrival end of the first check valve and the arrival end of the second check valve are connected with the first electric expansion valve simultaneously, and another interface of the first electric expansion valve is connected with device for drying and filtering.
In a preferred embodiment of the present invention, draw a branch road between described first electric expansion valve and device for drying and filtering and the second electric expansion valve is connected, the other end of the second electric expansion valve is connected between the air entry of compressor and II interface end of four-way change-over valve
The other end of device for drying and filtering is connected with the port of export of fluid reservoir, and the arrival end of fluid reservoir is connected with the port of export of the 3rd check valve and the port of export of the 4th check valve simultaneously.
In a preferred embodiment of the present invention, the port of export of described second check valve and the arrival end of the 4th check valve are connected with the first electromagnetic valve and the second electromagnetic valve simultaneously, the other end of the first electromagnetic valve is connected with the entrance main of solar energy heating evaporator unit, 3rd electromagnetic valve two ends are in parallel with the entrance point of air source fin-tube type heat exchanger and the port of export respectively
Second temperature sensor is arranged near the suction end of compressor, three-temperature sensor is arranged between the first electromagnetic valve, the second electromagnetic valve and the second check valve, the 4th check valve, and the 4th temperature sensor is arranged between the second plate type heat exchanger and the first check valve and the 3rd check valve.
In a preferred embodiment of the present invention, described hot water unit includes: the first water pump, attemperater and the 5th temperature sensor, the circulating outlet of attemperater and the water inlet of the first water pump connect, the outlet of the first water pump and the water route of the first plate type heat exchanger connect, the circulation water inlet of attemperater and the other end in the first plate type heat exchanger water route connect, and the 5th temperature sensor is arranged on inside attemperater.
In a preferred embodiment of the present invention, described room conditioning terminal units includes: room conditioning end, the second water pump and the 6th temperature sensor, the return pipe of room conditioning end and the water inlet of the second water pump connect, the outlet of the second water pump and the water route of the second plate type heat exchanger connect, the feed pipe of room conditioning end and the other end in the second plate type heat exchanger water route connect, and the 6th temperature sensor is disposed in the interior near the return pipe of air conditioning terminal.
For solving above-mentioned technical problem, another technical solution used in the present invention is: provide the control method of a kind of solar air source heat pumps combined supply system, including following operational mode:
Solar heat pump heating/hot water pattern, air source heat pump heating/hot water pattern, separate refrigeration pattern, total heat recovery pattern (refrigeration+hot-water mode), each operational mode carrying out practically and the process of control are as follows:
One, solar heat pump heating/hot water pattern
When temperature T that the first temperature sensor records1≥T0During+T, system is solar heat pump heating/hot water pattern, T0For ambient temperature, T for arranging the temperature difference, now opens: compressor, the first electromagnetic valve, the 3rd electromagnetic valve, the first water pump, the second water pump, closes: the second electromagnetic valve, blower fan；
nullSpecific works process is: cold-producing medium becomes gaseous state after absorbing solar heat in solar energy heating vaporizer，Gaseous refrigerant is after the 5th check valve，Owing to air source fin-tube type heat exchanger runner is longer，Resistance is bigger，Cause flowing through the 3rd electromagnetic valve from the 5th check valve gaseous refrigerant major part out，Small part flows through air source fin-tube type heat exchanger，Compressor air suction mouth is entered through four-way change-over valve (I → II)，Gaseous refrigerant becomes the superheat state of High Temperature High Pressure after compressor adiabatic compression，The overheated gaseous refrigerant of High Temperature High Pressure enters the first plate type heat exchanger and releases a part of condensation heat，Under the effect of the first water pump，Condensation heat water in heating and thermal insulation water tank，The cold-producing medium of High Temperature High Pressure enters into the second plate type heat exchanger releasing condensation heat through four-way change-over valve (IV → III) and becomes liquid，In heating chamber, the recirculated water of air conditioning terminal unit is indoor heating，Condensed liquid refrigerant enters fluid reservoir through the 3rd check valve，Fluid reservoir liquid refrigerant drying filter out enters the first electric expansion valve and throttles into the gas-liquid two-phase cold-producing medium of low-temp low-pressure，Under the effect of pressure reduction, by the second check valve, (cold-producing medium after now the first electric expansion valve throttles can not pass through the first check valve to the gas-liquid two-phase cold-producing medium of low-temp low-pressure，Owing to the pressure of first single one-way valved outlet end is more than the pressure of arrival end)，Enter solar energy heating vaporizer through the first electromagnetic valve to be evaporated，Complete a solar heat pump refrigerant cycle，System circulates work and so forth，
System is when this operational mode is shut down, first electromagnetic valve first cuts out, stop to solar energy heating evaporator unit for gas-liquid two phase refrigerant, in solar energy heating evaporator unit, the liquid refrigerant of residual may proceed to evaporation, superheated steam is formed until the most withered, compressor is out of service after postponing certain time, i.e. system closedown completes
Under this operational mode, system can be simultaneously for warm water heating, it is also possible to individually heating or individually water heating, when in attemperater, water temperature reaches set water temperature, the first water pump disconnects, and the first plate-type heat-exchange does not carry out heat exchange in systems only as coolant channel；
Under solar heat pump heating/hot water pattern, the aperture of the first electric expansion valve is controlled by the temperature difference of the second temperature sensor and three-temperature sensor:
In the case of solar irradiation intensity is higher, compressor return air temperature can be higher, when temperature T that the second temperature sensor detects2≥TgTime (TgIt is the unlatching temperature value of the second electric expansion valve setting), the second electric expansion valve is opened, and the second electronic expansion valve opening is with T2Raising and increase, the low-temp low-pressure gas-liquid two-phase cold-producing medium after the second electric expansion valve throttling carries out cooling protection compressor to compressor return air；
When temperature T that the second temperature sensor detects2＜ TgTime, the second electric expansion valve 208 aperture is zero, stops Liquid injection cooling；
Two, air source heat pump heating/hot water pattern
When temperature T that the first temperature sensor records1＜ T0During+T, system is air source heat pump heating/hot water pattern, opens: compressor, the second electromagnetic valve, the first water pump, the second water pump, blower fan, closes: the first electromagnetic valve, the 3rd electromagnetic valve；
nullSpecific works process is: cold-producing medium becomes gaseous state after absorbing the energy of outside air in air source fin-tube type heat exchanger，Gaseous refrigerant enters compressor air suction mouth through four-way change-over valve (I → II)，Gaseous refrigerant becomes the superheat state of High Temperature High Pressure after compressor adiabatic compression，The overheated gaseous refrigerant of High Temperature High Pressure enters the first plate type heat exchanger and releases a part of condensation heat，Under the effect of the first water pump，Condensation heat water in heating and thermal insulation water tank，The cold-producing medium of High Temperature High Pressure enters into the second plate type heat exchanger releasing condensation heat through four-way change-over valve (IV → III) and becomes liquid，In heating chamber, the recirculated water of air conditioning terminal unit is indoor heating，Condensed liquid refrigerant enters fluid reservoir through the 3rd check valve，Fluid reservoir liquid refrigerant drying filter out enters the first electric expansion valve and throttles into the gas-liquid two-phase cold-producing medium of low-temp low-pressure，Under the effect of pressure reduction, by the second check valve, (cold-producing medium after now the first electric expansion valve throttles can not pass through the first check valve to the gas-liquid two-phase cold-producing medium of low-temp low-pressure，Because the pressure of the first one-way valved outlet end is more than the pressure of arrival end)，Enter air source Fin and tube evaporator through the second electromagnetic valve to be evaporated，Complete an air source heat pump circulation，System circulates work and so forth，
This operational mode refrigerant cycle is without solar energy heating vaporizer, it is adaptable to the situation that solar irradiation intensity is not enough,
Under this operational mode, system can be simultaneously for warm water heating, it is also possible to individually heating or water heating, and when in attemperater, water temperature reaches set water temperature, the first water pump disconnects, and the first plate type heat exchanger does not carry out heat exchange in systems only as coolant channel,
Under air source heat pump heating/hot water pattern, the aperture of the first electric expansion valve is controlled by the temperature difference of the second temperature sensor and three-temperature sensor；
Three, separate refrigeration pattern
Open: compressor, the second electromagnetic valve, the second water pump, blower fan, close: the first electromagnetic valve, the 3rd electromagnetic valve, the first water pump；
nullSpecific works process is: the cold-producing medium of low-temp low-pressure becomes gaseous refrigerant after absorbing heat in the second plate type heat exchanger，Gaseous refrigerant enters compressor compresses through four-way change-over valve (III → II) and becomes the overheated gaseous refrigerant of High Temperature High Pressure，The overheated gaseous refrigerant of High Temperature High Pressure enters air source fin-tube type heat exchanger through the first plate type heat exchanger (only as coolant channel) and four-way change-over valve (IV → I) and is condensed into liquid refrigerant，Condensation heat is discharged to outdoor environment under the effect of blower fan，Liquid refrigerant enters fluid reservoir through the second electromagnetic valve and the 4th check valve，Enter the first electric expansion valve from fluid reservoir liquid refrigerant drying filter out and throttle into the gas-liquid two-phase cold-producing medium of low-temp low-pressure，Under the effect of pressure reduction, by the first check valve, (cold-producing medium after now the first electric expansion valve throttles can not pass through the second check valve to the gas-liquid two-phase cold-producing medium of low-temp low-pressure，Because the pressure of the second one-way valved outlet end is more than the pressure of arrival end)，Enter the second plate type heat exchanger，Complete a kind of refrigeration cycle，System circulates work and so forth，Persistently freeze for indoor；
Four, total heat recovery pattern (refrigeration+hot-water mode)
Open: compressor, the second electromagnetic valve, the 3rd electromagnetic valve, the first water pump, the second water pump, close: the first electromagnetic valve, blower fan；
nullSpecific works process is: the cold-producing medium of low-temp low-pressure becomes gaseous refrigerant after absorbing heat in the second plate type heat exchanger，Gaseous refrigerant enters compressor compresses through four-way change-over valve (III → II) and becomes the overheated gaseous refrigerant of High Temperature High Pressure，The overheated gaseous refrigerant of High Temperature High Pressure enters the first plate type heat exchanger to carry out condensation and becomes liquid，Condensation heat water in heating and thermal insulation water tank，From the first plate type heat exchanger liquid refrigerant out through four-way change-over valve (IV → I)，Owing to air source fin-tube type heat exchanger runner is longer，Resistance is bigger，So major part liquid refrigerant flows through the 3rd electromagnetic valve，Small part liquid refrigerant flows through air source fin-tube type heat exchanger，Liquid refrigerant enters fluid reservoir through the second electromagnetic valve and the 4th check valve again，Enter the first electric expansion valve from fluid reservoir liquid refrigerant drying filter out and throttle into the gas-liquid two-phase cold-producing medium of low-temp low-pressure，Under the effect of pressure reduction, by the first check valve, (cold-producing medium after now the first electric expansion valve throttles can not pass through the second check valve to the gas-liquid two-phase cold-producing medium of low-temp low-pressure，Because the pressure of the second one-way valved outlet end is more than the pressure of arrival end)，Enter the second plate type heat exchanger，Complete a total heat recovery circulation，System circulates work and so forth，For freely producing domestic hot-water while the refrigeration of indoor，
When the temperature that the 5th temperature sensor being arranged within attemperater detects has reached setting hot water temperature, total heat recovery pattern automatically switches to separate refrigeration pattern.
The invention has the beneficial effects as follows: solar air source heat pumps combined supply system of the present invention and control method thereof achieve efficient heating, refrigeration and water heating three zones and the combination in any of three zones, in the case of solar irradiation intensity is enough, system is with solar energy as low-temperature heat source as indoor heating or water heating, in the case of solar irradiation insufficient strength, system can be with air as low-temperature heat source as indoor heating or water heating, and summer can also be water heating while indoor refrigeration, system has higher comprehensive energy efficiency ratio, and system can not be limited by weather, realize continuous-stable to run efficiently.
Accompanying drawing explanation
For the technical scheme being illustrated more clearly that in the embodiment of the present invention, in describing embodiment below, the required accompanying drawing used is briefly described, apparently, accompanying drawing in describing below is only some embodiments of the present invention, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings, wherein:
Fig. 1 is the structural representation of solar air source heat pumps combined supply system one preferred embodiment of the present invention；
nullIn accompanying drawing, the labelling of each parts is as follows: 100、Solar energy heating evaporator unit，101、Solar energy heating vaporizer，102、First temperature sensor，200、Air source heat pump main computer unit，201、Compressor，202、First plate type heat exchanger，203、Four-way change-over valve，204、Second plate type heat exchanger，205、Fluid reservoir，206、Device for drying and filtering，207、First electric expansion valve，208、Second electric expansion valve，209、First check valve，210、Second check valve，211、3rd check valve，212、4th check valve，213、First electromagnetic valve，214、Second electromagnetic valve，215、3rd electromagnetic valve，216、Blower fan，217、Air source fin-tube type heat exchanger，218、5th check valve，219、Second temperature sensor，220、Three-temperature sensor，221、4th temperature sensor，300、Hot water unit，301、First water pump，302、Attemperater，303、5th temperature sensor，400、Room conditioning terminal units，401、Second water pump，402、6th temperature sensor，403、Room conditioning end.
Detailed description of the invention
Technical scheme in the embodiment of the present invention will be clearly and completely described below, it is clear that described embodiment is only a part of embodiment of the present invention rather than whole embodiments.Based on the embodiment in the present invention, all other embodiments that those of ordinary skill in the art are obtained under not making creative work premise, broadly fall into the scope of protection of the invention.
Referring to Fig. 1, the embodiment of the present invention includes:
A kind of solar air source heat pumps combined supply system, including: solar energy heating evaporator unit 100, air source heat pump main computer unit 200, hot water unit 300 and indoor end unit 400.
Solar energy heating evaporator unit 100 includes: solar energy heating vaporizer 101 and the first temperature sensor 102, and the first temperature sensor 102 is arranged on the outlet main of the solar energy heating vaporizer 101 that polylith is arranged in parallel.
Air source heat pump main computer unit 200 includes: compressor 201, first plate type heat exchanger 202, four-way change-over valve 203, second plate type heat exchanger 204, fluid reservoir 205, device for drying and filtering 206, first electric expansion valve 207, second electric expansion valve 208, first check valve 209, second check valve 210, 3rd check valve 211, 4th check valve 212, 5th check valve 218, first electromagnetic valve 213, second electromagnetic valve 214, 3rd electromagnetic valve 215, blower fan 216, air source fin-tube type heat exchanger 217, second temperature sensor 219, three-temperature sensor 220 and the 4th temperature sensor 221.
The arrival end of the 5th check valve 218 is connected with the outlet main of solar energy heating vaporizer 101, and the port of export of the 5th check valve 218 is connected with air source fin-tube type heat exchanger 217 and the second electromagnetic valve 214 simultaneously.
The other end of air source fin-tube type heat exchanger 217 is connected with I interface end of four-way change-over valve 203, the II of four-way change-over valve 203, III, IV interface end is connected with air entry, the second plate type heat exchanger 204 and first plate type heat exchanger 202 of compressor 201 respectively.
The air vent of compressor 201 and another interface of the first plate type heat exchanger 202 connect, and another interface of the second plate type heat exchanger 204 is connected with the port of export, the arrival end of the 3rd check valve 211 of the first check valve 209 simultaneously.
The arrival end of the first check valve 209 and the arrival end of the second check valve 210 are connected with the first electric expansion valve 207 simultaneously, and another interface of the first electric expansion valve 207 is connected with device for drying and filtering.
Drawing a branch road between first electric expansion valve 207 and device for drying and filtering 206 and the second electric expansion valve 208 is connected, the other end of the second electric expansion valve 208 is connected between the air entry of compressor 201 and II interface end of four-way change-over valve 203.
The other end of device for drying and filtering 206 is connected with the port of export of fluid reservoir 205, and the arrival end of fluid reservoir 205 is connected with the port of export of the 3rd check valve 211 and the port of export of the 4th check valve 212 simultaneously.
The port of export of the second check valve 210 and the arrival end of the 4th check valve 212 are connected with the first electromagnetic valve 213 and the second electromagnetic valve 214 simultaneously, the other end of the first electromagnetic valve 213 is connected with the entrance main of solar energy heating evaporator unit 100, and the 3rd electromagnetic valve 215 two ends are in parallel with the entrance point of air source fin-tube type heat exchanger 217 and the port of export respectively.
Second temperature sensor 219 is arranged near the suction end of compressor 201, three-temperature sensor 220 is arranged between first electromagnetic valve the 213, second electromagnetic valve 214 and the second check valve the 210, the 4th check valve 212, and the 4th temperature sensor 221 is arranged between the second plate type heat exchanger 204 and the first check valve 209 and the 3rd check valve 221.
Hot water unit 300 includes: the first water pump 301, attemperater 302 and the 5th temperature sensor 303, the circulating outlet of attemperater 302 and the water inlet of the first water pump 301 connect, the outlet of the first water pump 301 and the water route of the first plate type heat exchanger 202 connect, the circulation water inlet of attemperater 302 and the other end in the first plate type heat exchanger 202 water route connect, and it is internal that the 5th temperature sensor 303 is arranged on attemperater 302.
Room conditioning terminal units 400 includes: room conditioning end the 403, second water pump 401 and the 6th temperature sensor 402, the return pipe of room conditioning end 403 and the water inlet of the second water pump 401 connect, the outlet of the second water pump 401 and the water route of the second plate type heat exchanger 204 connect, the feed pipe of room conditioning end 403 and the other end in the second plate type heat exchanger 204 water route connect, and the 6th temperature sensor 402 is disposed in the interior near the return pipe of air conditioning terminal 403.
Solar energy heating evaporator unit 100, hot water unit 300 and room conditioning terminal units 400 are connected with air source heat pump main computer unit 200 respectively.
Solar air source heat pumps combined supply system of the present invention and control method, according to weather conditions and user's request, can be divided into following operational mode:
Solar heat pump heating/hot water pattern, air source heat pump heating/hot water pattern, separate refrigeration pattern, total heat recovery pattern (refrigeration+hot-water mode), each operational mode carrying out practically and the process of control are as follows:
One, solar heat pump heating/hot water pattern
When temperature T that the first temperature sensor 102 records1≥T0During+T, system is solar heat pump heating/hot water pattern, T0For ambient temperature, T for arranging the temperature difference, such as T=2 DEG C；Open: compressor the 201, first electromagnetic valve the 213, the 3rd electromagnetic valve the 215, first water pump the 31, second water pump 41, close: the second electromagnetic valve 214, blower fan 216.
nullSpecific works process is: cold-producing medium becomes gaseous state after absorbing solar heat in solar energy heating vaporizer 101，Gaseous refrigerant is after the 5th check valve 218，Owing to air source fin-tube type heat exchanger 217 runner is longer，Therefore resistance is bigger，Cause flowing through the 3rd electromagnetic valve 215 from the 5th check valve 218 gaseous refrigerant major part out，Small part flows through air source fin-tube type heat exchanger 217，Through four-way change-over valve 203(I → II) enter compressor 201 air entry，Gaseous refrigerant becomes the superheat state of High Temperature High Pressure after compressor 201 adiabatic compression，The overheated gaseous refrigerant of High Temperature High Pressure enters the first plate type heat exchanger 202 and releases a part of condensation heat，Under the effect of the first water pump 301，Condensation heat water in heating and thermal insulation water tank 303，The cold-producing medium of High Temperature High Pressure is through four-way change-over valve 203(IV → III) enter into the second plate type heat exchanger 204 and release condensation heat and become liquid，In heating chamber, the recirculated water of air conditioning terminal unit 400 is indoor heating，Condensed liquid refrigerant enters fluid reservoir 205 through the 3rd check valve 211，Fluid reservoir 205 liquid refrigerant drying filter 206 out enters the first electric expansion valve 207 and throttles into the gas-liquid two-phase cold-producing medium of low-temp low-pressure，The gas-liquid two-phase cold-producing medium of low-temp low-pressure can not pass through the first check valve 209 by the cold-producing medium after the second check valve 210(now the first electric expansion valve 207 throttling under the effect of pressure reduction，Pressure due to first check valve 209 port of export is more than the pressure of arrival end)，Enter solar energy heating vaporizer 101 through the first electromagnetic valve 213 to be evaporated，Complete a solar heat pump refrigerant cycle，System circulates work and so forth；System is when this operational mode is shut down, first electromagnetic valve 213 first cuts out, stop to solar energy heating evaporator unit 100 for gas-liquid two phase refrigerant, in solar energy heating evaporator unit 100, the liquid refrigerant of residual may proceed to evaporation, superheated steam is formed until the most withered, compressor 201 is out of service after postponing certain time, i.e. system closedown completes.
This operational mode is applicable to the weather condition that solar irradiation intensity is enough.
Under this operational mode, system can be simultaneously for warm water heating, it is also possible to individually heating or individually water heating, when in attemperater 302, water temperature reaches set water temperature, first water pump 301 disconnects, and the first plate type heat exchanger 202 does not carry out heat exchange in systems only as coolant channel.
Under solar heat pump heating/hot water pattern, the aperture of described first electric expansion valve 207 is controlled by the temperature difference of the second temperature sensor 219 and three-temperature sensor 220.
In the case of solar irradiation intensity is higher, compressor 201 suction temperature can be higher, when temperature T that the second temperature sensor 219 detects2≥TgTime (TgIt is the unlatching temperature value of the second electric expansion valve 208 setting, such as Tg=25 DEG C), the second electric expansion valve 208 is opened, and the second electric expansion valve 208 aperture is with T2Raising and increase, the low-temp low-pressure gas-liquid two-phase cold-producing medium after the second electric expansion valve 208 throttling carries out cooling protection compressor to compressor 201 return-air.
When temperature T that the second temperature sensor 219 detects2＜ TgTime, the second electric expansion valve 208 aperture is zero, stops Liquid injection cooling.
Two, air source heat pump heating/hot water pattern
When temperature T that the first temperature sensor 102 records1＜ T0During+T, system is air source heat pump heating/hot water pattern, opens: compressor the 201, second electromagnetic valve the 214, first water pump the 301, second water pump 401, blower fan 216, closes: the first electromagnetic valve the 213, the 3rd electromagnetic valve 215.
nullSpecific works process is: cold-producing medium becomes gaseous state after absorbing the energy of outside air in air source fin-tube type heat exchanger 217，Gaseous refrigerant is through four-way change-over valve 203(I → II) enter compressor 201 air entry，Gaseous refrigerant becomes the superheat state of High Temperature High Pressure after compressor 201 adiabatic compression，The overheated gaseous refrigerant of High Temperature High Pressure enters the first plate type heat exchanger 202 and releases a part of condensation heat，Under the effect of the first water pump 301，Condensation heat water in heating and thermal insulation water tank 303，The cold-producing medium of High Temperature High Pressure is through four-way change-over valve 203(IV → III) enter into the second plate type heat exchanger 204 and release condensation heat and become liquid，In heating chamber, the recirculated water of air conditioning terminal unit 400 is indoor heating，Condensed liquid refrigerant enters fluid reservoir 205 through the 3rd check valve 211，Fluid reservoir 205 liquid refrigerant drying filter 206 out enters the first electric expansion valve 207 and throttles into the gas-liquid two-phase cold-producing medium of low-temp low-pressure，The gas-liquid two-phase cold-producing medium of low-temp low-pressure can not pass through the first check valve 209 by the cold-producing medium after the second check valve 210(now the first electric expansion valve 207 throttling under the effect of pressure reduction，Because the pressure of first check valve 209 port of export is more than the pressure of arrival end)，Enter air source Fin and tube evaporator 217 through the second electromagnetic valve 214 to be evaporated，Complete an air source heat pump circulation，System circulates work and so forth.
This operational mode refrigerant cycle is without solar energy heating vaporizer 101, it is adaptable to the situation that solar irradiation intensity is not enough.
Under this operational mode, system can be simultaneously for warm water heating, it is also possible to individually heating or water heating, when in attemperater 302, water temperature reaches set water temperature, first water pump 301 disconnects, and the first plate type heat exchanger 202 does not carry out heat exchange in systems only as coolant channel.
Under air source heat pump heating/hot water pattern, the aperture of described first electric expansion valve 207 is controlled by the temperature difference of the second temperature sensor 219 and three-temperature sensor 220.
Three, separate refrigeration pattern
Open: compressor the 201, second electromagnetic valve the 214, second water pump 401, blower fan 216, close: first electromagnetic valve the 213, the 3rd electromagnetic valve the 215, first water pump 301.
nullSpecific works process is: the cold-producing medium of low-temp low-pressure becomes gaseous refrigerant after absorbing heat in the second plate type heat exchanger 204，Gaseous refrigerant is through four-way change-over valve 203(III → II) enter compressor 201 and be compressed into the overheated gaseous refrigerant of High Temperature High Pressure，The overheated gaseous refrigerant of High Temperature High Pressure through the first plate type heat exchanger 202(only as coolant channel) and four-way change-over valve 203(IV → I) enter air source fin-tube type heat exchanger 217 be condensed into liquid refrigerant，Condensation heat is discharged to outdoor environment under the effect of blower fan 216，Liquid refrigerant enters fluid reservoir 205 through the second electromagnetic valve 214 and the 4th check valve 212，Enter the first electric expansion valve 207 from fluid reservoir 205 liquid refrigerant drying filter 206 out and throttle into the gas-liquid two-phase cold-producing medium of low-temp low-pressure，The gas-liquid two-phase cold-producing medium of low-temp low-pressure can not pass through the second check valve 210 by the cold-producing medium after the first check valve 209(now the first electric expansion valve 207 throttling under the effect of pressure reduction，Because the pressure of second check valve 210 port of export is more than the pressure of arrival end)，Enter the second plate type heat exchanger 204.Completing a kind of refrigeration cycle, system circulates work and so forth, persistently freezes for indoor.
Four, total heat recovery pattern (refrigeration+hot-water mode)
Open: compressor the 201, second electromagnetic valve the 214, the 3rd electromagnetic valve the 215, first water pump the 301, second water pump 401, close: the first electromagnetic valve 213, blower fan 216.
nullSpecific works process is: the cold-producing medium of low-temp low-pressure becomes gaseous refrigerant after absorbing heat in the second plate type heat exchanger 204，Gaseous refrigerant is through four-way change-over valve 203(III → II) enter compressor 201 and be compressed into the overheated gaseous refrigerant of High Temperature High Pressure，The overheated gaseous refrigerant of High Temperature High Pressure enters the first plate type heat exchanger 202 to carry out condensation and becomes liquid，Condensation heat water in heating and thermal insulation water tank 302，From the first plate type heat exchanger 202 liquid refrigerant out through four-way change-over valve 203(IV → I)，Owing to air source fin-tube type heat exchanger 217 runner is longer，Resistance is bigger，So major part liquid refrigerant flows through the 3rd electromagnetic valve 215，Small part liquid refrigerant flows through air source fin-tube type heat exchanger 217，Liquid refrigerant enters fluid reservoir 205 through the second electromagnetic valve 214 and the 4th check valve 212 again，Enter the first electric expansion valve 207 from fluid reservoir 205 liquid refrigerant drying filter 206 out and throttle into the gas-liquid two-phase cold-producing medium of low-temp low-pressure，The gas-liquid two-phase cold-producing medium of low-temp low-pressure can not pass through the second check valve 210 by the cold-producing medium after the first check valve 209(now the first electric expansion valve 207 throttling under the effect of pressure reduction，Because the pressure of second check valve 210 port of export is more than the pressure of arrival end)，Enter the second plate type heat exchanger 204；Completing a total heat recovery circulation, system circulates work and so forth, for freely producing domestic hot-water while the refrigeration of indoor.
When the temperature that the 5th temperature sensor 303 being arranged within attemperater 302 detects has reached setting hot water temperature, total heat recovery pattern can automatically switch to separate refrigeration pattern.
Solar air source heat pumps combined supply system of the present invention and control method thereof provide the benefit that:
One, efficient heating, refrigeration and water heating three zones and the combination in any of three zones are achieved；
Two, solar irradiation intensity enough in the case of, system is with solar energy as low-temperature heat source as indoor heating or water heating, and Energy Efficiency Ratio is the highest；
Three, in the case of solar irradiation insufficient strength, system can be with air as low-temperature heat source as indoor heating or water heating, it is ensured that system can persistently heat or water heating, compensate for the discontinuity defect of solar heat pump；
Four, during total heat recovery in summer operational mode, system can provide free domestic hot-water；
Five, running in the case of solar irradiation intensity is the highest, system can effectively control compressor return air temperature, it is to avoid compressor is too high and impaired because of suction temperature, extends the service life of compressor.
The foregoing is only embodiments of the invention; not thereby the scope of the claims of the present invention is limited; every equivalent structure utilizing description of the invention content to be made or equivalence flow process conversion; or directly or indirectly it is used in other relevant technical field, the most in like manner it is included in the scope of patent protection of the present invention.
Claims (10)
1. a solar air source heat pumps combined supply system, it is characterized in that, including: solar energy heating evaporator unit, air source heat pump main computer unit, hot water unit, indoor end unit, solar energy heating evaporator unit, hot water unit and room conditioning terminal units are connected with air source heat pump main computer unit respectively.
Solar air source heat pumps combined supply system the most according to claim 1, it is characterized in that, described solar energy heating evaporator unit includes: solar energy heating vaporizer and the first temperature sensor, and the first temperature sensor is arranged on the outlet main of the solar energy heating vaporizer that polylith is arranged in parallel.
Solar air source heat pumps combined supply system the most according to claim 2, it is characterized in that, described air source heat pump main computer unit includes: compressor, first plate type heat exchanger, four-way change-over valve, second plate type heat exchanger, fluid reservoir, device for drying and filtering, first electric expansion valve, second electric expansion valve, first check valve, second check valve, 3rd check valve, 4th check valve, 5th check valve, first electromagnetic valve, second electromagnetic valve, 3rd electromagnetic valve, blower fan, air source fin-tube type heat exchanger, second temperature sensor, three-temperature sensor and the 4th temperature sensor.
Solar air source heat pumps combined supply system the most according to claim 3, it is characterized in that, the described arrival end of the 5th check valve is connected with the outlet main of solar energy heating vaporizer, and the port of export of the 5th check valve is connected with air source fin-tube type heat exchanger and the second electromagnetic valve simultaneously
The other end of air source fin-tube type heat exchanger is connected with I interface end of four-way change-over valve, the II of four-way change-over valve, III, IV interface end is connected with air entry, the second plate type heat exchanger and first plate type heat exchanger of compressor respectively.
Solar air source heat pumps combined supply system the most according to claim 4, it is characterized in that, the air vent of described compressor and another interface of the first plate type heat exchanger connect, another interface of second plate type heat exchanger is connected with the port of export, the arrival end of the 3rd check valve of the first check valve simultaneously
The arrival end of the first check valve and the arrival end of the second check valve are connected with the first electric expansion valve simultaneously, and another interface of the first electric expansion valve is connected with device for drying and filtering.
Solar air source heat pumps combined supply system the most according to claim 5, it is characterized in that, draw a branch road between described first electric expansion valve and device for drying and filtering and the second electric expansion valve is connected, the other end of the second electric expansion valve is connected between the air entry of compressor and II interface end of four-way change-over valve
The other end of device for drying and filtering is connected with the port of export of fluid reservoir, and the arrival end of fluid reservoir is connected with the port of export of the 3rd check valve and the port of export of the 4th check valve simultaneously.
Solar air source heat pumps combined supply system the most according to claim 6, it is characterized in that, the port of export of described second check valve and the arrival end of the 4th check valve are connected with the first electromagnetic valve and the second electromagnetic valve simultaneously, the other end of the first electromagnetic valve is connected with the entrance main of solar energy heating evaporator unit
3rd electromagnetic valve two ends are in parallel with the entrance point of air source fin-tube type heat exchanger and the port of export respectively,
Second temperature sensor is arranged near the suction end of compressor, three-temperature sensor is arranged between the first electromagnetic valve, the second electromagnetic valve and the second check valve, the 4th check valve, and the 4th temperature sensor is arranged between the second plate type heat exchanger and the first check valve and the 3rd check valve.
Solar air source heat pumps combined supply system the most according to claim 4, it is characterized in that, described hot water unit includes: the first water pump, attemperater and the 5th temperature sensor, the circulating outlet of attemperater and the water inlet of the first water pump connect, the outlet of the first water pump and the water route of the first plate type heat exchanger connect, the circulation water inlet of attemperater and the other end in the first plate type heat exchanger water route connect, and the 5th temperature sensor is arranged on inside attemperater.
Solar air source heat pumps combined supply system the most according to claim 4, it is characterized in that, described room conditioning terminal units includes: room conditioning end, the second water pump and the 6th temperature sensor, the return pipe of room conditioning end and the water inlet of the second water pump connect, the outlet of the second water pump and the water route of the second plate type heat exchanger connect, the feed pipe of room conditioning end and the other end in the second plate type heat exchanger water route connect, and the 6th temperature sensor is disposed in the interior near the return pipe of air conditioning terminal.
10. the control method of a solar air source heat pumps combined supply system, it is characterised in that include following operational mode:
Solar heat pump heating/hot water pattern, air source heat pump heating/hot water pattern, separate refrigeration pattern, total heat recovery pattern (refrigeration+hot-water mode), each operational mode carrying out practically and the process of control are as follows:
One, solar heat pump heating/hot water pattern
When temperature T that the first temperature sensor records1≥T0During+T, system is solar heat pump heating/hot water pattern, T0For ambient temperature, T for arranging the temperature difference, now opens: compressor, the first electromagnetic valve, the 3rd electromagnetic valve, the first water pump, the second water pump, closes: the second electromagnetic valve, blower fan；
nullSpecific works process is: cold-producing medium becomes gaseous state after absorbing solar heat in solar energy heating vaporizer，Gaseous refrigerant is after the 5th check valve，Owing to air source fin-tube type heat exchanger runner is longer，Resistance is bigger，Cause flowing through the 3rd electromagnetic valve from the 5th check valve gaseous refrigerant major part out，Small part flows through air source fin-tube type heat exchanger，Compressor air suction mouth is entered through four-way change-over valve (I → II)，Gaseous refrigerant becomes the superheat state of High Temperature High Pressure after compressor adiabatic compression，The overheated gaseous refrigerant of High Temperature High Pressure enters the first plate type heat exchanger and releases a part of condensation heat，Under the effect of the first water pump，Condensation heat water in heating and thermal insulation water tank，The cold-producing medium of High Temperature High Pressure enters into the second plate type heat exchanger releasing condensation heat through four-way change-over valve (IV → III) and becomes liquid，In heating chamber, the recirculated water of air conditioning terminal unit is indoor heating，Condensed liquid refrigerant enters fluid reservoir through the 3rd check valve，Fluid reservoir liquid refrigerant drying filter out enters the first electric expansion valve and throttles into the gas-liquid two-phase cold-producing medium of low-temp low-pressure，Under the effect of pressure reduction, by the second check valve, (cold-producing medium after now the first electric expansion valve throttles can not pass through the first check valve to the gas-liquid two-phase cold-producing medium of low-temp low-pressure，Owing to the pressure of first single one-way valved outlet end is more than the pressure of arrival end)，Enter solar energy heating vaporizer through the first electromagnetic valve to be evaporated，Complete a solar heat pump refrigerant cycle，System circulates work and so forth，
System is when this operational mode is shut down, first electromagnetic valve first cuts out, stop to solar energy heating evaporator unit for gas-liquid two phase refrigerant, in solar energy heating evaporator unit, the liquid refrigerant of residual may proceed to evaporation, superheated steam is formed until the most withered, compressor is out of service after postponing certain time, i.e. system closedown completes
Under this operational mode, system can be simultaneously for warm water heating, it is also possible to individually heating or individually water heating, when in attemperater, water temperature reaches set water temperature, the first water pump disconnects, and the first plate-type heat-exchange does not carry out heat exchange in systems only as coolant channel；
Under solar heat pump heating/hot water pattern, the aperture of the first electric expansion valve is controlled by the temperature difference of the second temperature sensor and three-temperature sensor:
In the case of solar irradiation intensity is higher, compressor return air temperature can be higher, when temperature T that the second temperature sensor detects2≥TgTime (TgIt is the unlatching temperature value of the second electric expansion valve setting), the second electric expansion valve is opened, and the second electronic expansion valve opening is with T2Raising and increase, the low-temp low-pressure gas-liquid two-phase cold-producing medium after the second electric expansion valve throttling carries out cooling protection compressor to compressor return air；
When temperature T that the second temperature sensor detects2＜ TgTime, the second electronic expansion valve opening is zero, stops Liquid injection cooling；
Two, air source heat pump heating/hot water pattern
When temperature T that the first temperature sensor records1＜ T0During+T, system is air source heat pump heating/hot water pattern, opens: compressor, the second electromagnetic valve, the first water pump, the second water pump, blower fan, closes: the first electromagnetic valve, the 3rd electromagnetic valve；
nullSpecific works process is: cold-producing medium becomes gaseous state after absorbing the energy of outside air in air source fin-tube type heat exchanger，Gaseous refrigerant enters compressor air suction mouth through four-way change-over valve (I → II)，Gaseous refrigerant becomes the superheat state of High Temperature High Pressure after compressor adiabatic compression，The overheated gaseous refrigerant of High Temperature High Pressure enters the first plate type heat exchanger and releases a part of condensation heat，Under the effect of the first water pump，Condensation heat water in heating and thermal insulation water tank，The cold-producing medium of High Temperature High Pressure enters into the second plate type heat exchanger releasing condensation heat through four-way change-over valve (IV → III) and becomes liquid，In heating chamber, the recirculated water of air conditioning terminal unit is indoor heating，Condensed liquid refrigerant enters fluid reservoir through the 3rd check valve，Fluid reservoir liquid refrigerant drying filter out enters the first electric expansion valve and throttles into the gas-liquid two-phase cold-producing medium of low-temp low-pressure，Under the effect of pressure reduction, by the second check valve, (cold-producing medium after now the first electric expansion valve throttles can not pass through the first check valve to the gas-liquid two-phase cold-producing medium of low-temp low-pressure，Because the pressure of the first one-way valved outlet end is more than the pressure of arrival end)，Enter air source Fin and tube evaporator through the second electromagnetic valve to be evaporated，Complete an air source heat pump circulation，System circulates work and so forth，
This operational mode refrigerant cycle is without solar energy heating vaporizer, it is adaptable to the situation that solar irradiation intensity is not enough,
Under this operational mode, system can be simultaneously for warm water heating, it is also possible to individually heating or water heating, and when in attemperater, water temperature reaches set water temperature, the first water pump disconnects, and the first plate type heat exchanger does not carry out heat exchange in systems only as coolant channel,
Under air source heat pump heating/hot water pattern, the aperture of the first electric expansion valve is controlled by the temperature difference of the second temperature sensor and three-temperature sensor；
Three, separate refrigeration pattern
Open: compressor, the second electromagnetic valve, the second water pump, blower fan, close: the first electromagnetic valve, the 3rd electromagnetic valve, the first water pump；
nullSpecific works process is: the cold-producing medium of low-temp low-pressure becomes gaseous refrigerant after absorbing heat in the second plate type heat exchanger，Gaseous refrigerant enters compressor compresses through four-way change-over valve (III → II) and becomes the overheated gaseous refrigerant of High Temperature High Pressure，The overheated gaseous refrigerant of High Temperature High Pressure enters air source fin-tube type heat exchanger through the first plate type heat exchanger (only as coolant channel) and four-way change-over valve (IV → I) and is condensed into liquid refrigerant，Condensation heat is discharged to outdoor environment under the effect of blower fan，Liquid refrigerant enters fluid reservoir through the second electromagnetic valve and the 4th check valve，Enter the first electric expansion valve from fluid reservoir liquid refrigerant drying filter out and throttle into the gas-liquid two-phase cold-producing medium of low-temp low-pressure，Under the effect of pressure reduction, by the first check valve, (cold-producing medium after now the first electric expansion valve throttles can not pass through the second check valve to the gas-liquid two-phase cold-producing medium of low-temp low-pressure，Because the pressure of the second one-way valved outlet end is more than the pressure of arrival end)，Enter the second plate type heat exchanger，Complete a kind of refrigeration cycle，System circulates work and so forth，Persistently freeze for indoor；
Four, total heat recovery pattern (refrigeration+hot-water mode)
Open: compressor, the second electromagnetic valve, the 3rd electromagnetic valve, the first water pump, the second water pump, close: the first electromagnetic valve, blower fan；
nullSpecific works process is: the cold-producing medium of low-temp low-pressure becomes gaseous refrigerant after absorbing heat in the second plate type heat exchanger，Gaseous refrigerant enters compressor compresses through four-way change-over valve (III → II) and becomes the overheated gaseous refrigerant of High Temperature High Pressure，The overheated gaseous refrigerant of High Temperature High Pressure enters the first plate type heat exchanger to carry out condensation and becomes liquid，Condensation heat water in heating and thermal insulation water tank，From the first plate type heat exchanger liquid refrigerant out through four-way change-over valve (IV → I)，Owing to air source fin-tube type heat exchanger runner is longer，Resistance is bigger，So major part liquid refrigerant flows through the 3rd electromagnetic valve，Small part liquid refrigerant flows through air source fin-tube type heat exchanger，Liquid refrigerant enters fluid reservoir through the second electromagnetic valve and the 4th check valve again，Enter the first electric expansion valve from fluid reservoir liquid refrigerant drying filter out and throttle into the gas-liquid two-phase cold-producing medium of low-temp low-pressure，Under the effect of pressure reduction, by the first check valve, (cold-producing medium after now the first electric expansion valve throttles can not pass through the second check valve to the gas-liquid two-phase cold-producing medium of low-temp low-pressure，Because the pressure of the second one-way valved outlet end is more than the pressure of arrival end)，Enter the second plate type heat exchanger，Complete a total heat recovery circulation，System circulates work and so forth，For freely producing domestic hot-water while the refrigeration of indoor，
When the temperature that the 5th temperature sensor being arranged within attemperater detects has reached setting hot water temperature, total heat recovery pattern automatically switches to separate refrigeration pattern.
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| CN113847587A (en) * | 2021-09-18 | 2021-12-28 | 江西国泰七零九科技有限公司 | Multi-clean energy combined heat and steam supply system for explosive production and operation control method |
| CN113847587B (en) * | 2021-09-18 | 2024-04-30 | 江西国泰七零九科技有限公司 | Multi-clean-energy combined heat and steam supply system for explosive production and operation control method |
| CN114151857A (en) * | 2021-11-12 | 2022-03-08 | 季英俊 | Ultralow-temperature vacuum double-effect evaporation system |
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