WO2011108073A1 - 空調給湯システム - Google Patents
空調給湯システム Download PDFInfo
- Publication number
- WO2011108073A1 WO2011108073A1 PCT/JP2010/053312 JP2010053312W WO2011108073A1 WO 2011108073 A1 WO2011108073 A1 WO 2011108073A1 JP 2010053312 W JP2010053312 W JP 2010053312W WO 2011108073 A1 WO2011108073 A1 WO 2011108073A1
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- WO
- WIPO (PCT)
- Prior art keywords
- hot water
- water supply
- air conditioning
- air
- heat
- Prior art date
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- 238000004378 air conditioning Methods 0.000 title claims abstract description 514
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 727
- 238000010438 heat treatment Methods 0.000 claims abstract description 28
- 238000013459 approach Methods 0.000 claims abstract description 10
- 239000003507 refrigerant Substances 0.000 claims description 208
- 238000012546 transfer Methods 0.000 claims description 74
- 238000005338 heat storage Methods 0.000 claims description 14
- 238000011144 upstream manufacturing Methods 0.000 claims description 8
- 238000001816 cooling Methods 0.000 claims description 7
- 238000012937 correction Methods 0.000 claims description 3
- 230000007423 decrease Effects 0.000 abstract description 8
- 238000000034 method Methods 0.000 description 37
- 230000008569 process Effects 0.000 description 30
- 238000001514 detection method Methods 0.000 description 16
- 239000007788 liquid Substances 0.000 description 15
- 238000012986 modification Methods 0.000 description 13
- 230000004048 modification Effects 0.000 description 13
- 238000010586 diagram Methods 0.000 description 7
- 238000012545 processing Methods 0.000 description 7
- 238000005057 refrigeration Methods 0.000 description 4
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 230000009897 systematic effect Effects 0.000 description 3
- 239000012267 brine Substances 0.000 description 2
- 239000002826 coolant Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 238000005219 brazing Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000011232 storage material Substances 0.000 description 1
- 239000008400 supply water Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Images
Classifications
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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
- F24D19/00—Details
- F24D19/10—Arrangement or mounting of control or safety devices
- F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
- F24D19/1066—Arrangement or mounting of control or safety devices for water heating systems for the combination of central heating and domestic hot water
- F24D19/1072—Arrangement or mounting of control or safety devices for water heating systems for the combination of central heating and domestic hot water the system uses a heat pump
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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
- F24D11/00—Central heating systems using heat accumulated in storage masses
- F24D11/02—Central heating systems using heat accumulated in storage masses using 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
- F24D17/00—Domestic hot-water supply systems
- F24D17/02—Domestic hot-water supply systems using heat pumps
-
- 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
- F24D19/00—Details
- F24D19/10—Arrangement or mounting of control or safety devices
- F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
- F24D19/1066—Arrangement or mounting of control or safety devices for water heating systems for the combination of central heating and domestic hot water
- F24D19/1081—Arrangement or mounting of control or safety devices for water heating systems for the combination of central heating and domestic hot water counting of energy consumption
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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
- F24D7/00—Central heating systems employing heat-transfer fluids not covered by groups F24D1/00 - F24D5/00, e.g. oil, salt or gas
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0007—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning
- F24F5/001—Compression cycle type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
- F24F5/0096—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater combined with domestic apparatus
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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
- F25B7/00—Compression machines, plants or systems, with cascade operation, i.e. with two or more circuits, the heat from the condenser of one circuit being absorbed by the evaporator of the next circuit
-
- 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
-
- 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
-
- 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
- F24D2200/16—Waste heat
- F24D2200/31—Air conditioning systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/46—Improving electric energy efficiency or saving
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/50—Load
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/60—Energy consumption
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2221/00—Details or features not otherwise provided for
- F24F2221/18—Details or features not otherwise provided for combined with domestic apparatus
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B13/00—Compression machines, plants or systems, with reversible cycle
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
- F25B2313/027—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means
- F25B2313/02741—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means using one four-way valve
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
- F25B2400/06—Several compression cycles arranged in parallel
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/20—Solar thermal
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/70—Hybrid systems, e.g. uninterruptible or back-up power supplies integrating renewable energies
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/52—Heat recovery pumps, i.e. heat pump based systems or units able to transfer the thermal energy from one area of the premises or part of the facilities to a different one, improving the overall efficiency
Definitions
- the present invention relates to an air conditioning and hot water supply system that performs air conditioning and hot water supply, and more particularly, to an air conditioning and hot water supply system that controls operation according to an air conditioning load and a hot water supply load.
- Patent Document 1 discloses an air conditioning and hot water supply system in which a heating heat exchanger and a hot water supply heat exchanger are connected to a compressor outlet of a heat pump cycle so as to be capable of switching between series and parallel, and a cycle that can perform air conditioning and hot water supply is configured. It is disclosed. According to this system, when the heating load is small, the amount of heat released to the hot water supply side can be increased, so that the heat energy can be effectively used.
- Patent Document 2 discloses that in a refrigerator equipped with a dual refrigeration cycle that uses at least two temperatures, heat can be exchanged between a condenser in a lower-temperature cycle and an evaporator in a higher-temperature cycle.
- the structure which forms an air path so that cold air can ventilate the evaporator of a side cycle and the evaporator of a low temperature side cycle is disclosed. According to this structure, the cooling rate at the time of switching the preset temperature in the refrigerator to a lower temperature can be improved.
- the temperature of hot water generally used for heating is 30 to 50 ° C.
- the temperature of hot water supply is 65 to 90 ° C. Therefore, in order to perform heating and hot water supply, it is necessary to generate hot water having different temperature levels.
- the present invention has been made in view of the above circumstances, and an object thereof is to provide an air conditioning and hot water supply system that can improve the efficiency of the entire system when heating and hot water supply are performed. Another object of the present invention is to provide an air conditioning and hot water supply system that can bear a part of the load of the hot water supply cycle in the air conditioning cycle in consideration of the characteristics of the air conditioning system and the hot water supply system.
- the present invention provides an air conditioning refrigerant circuit that drives an air conditioning compressor to perform cooling operation and heating operation, and a hot water supply refrigerant circuit that drives a hot water supply compressor to perform hot water supply operation.
- the air conditioning and hot water supply system including a control device that controls the operation, hot water supply assist means capable of radiating the heat generated when performing the heating operation in the air conditioning refrigerant circuit to the hot water supply refrigerant circuit
- the control device includes an air conditioning load estimation means (for example, means for performing step S10) for estimating the current air conditioning load value, and an air conditioning power consumption estimation means (for example, for estimating the current air conditioning power consumption value).
- the means for performing step S13), the air conditioning load temporary determining means for temporarily determining the estimated air conditioning load value (for example, means for performing step S16), and the temporarily determined air conditioning load value are predetermined.
- the air conditioning load increases, but the hot water supply load decreases, so that the system as a whole Operation that reduces power consumption can be performed. That is, according to the present invention, a part of the hot water supply load is borne by the air conditioning cycle, thereby improving the efficiency of the entire system and reducing power consumption.
- the “load” is obtained by dividing not only the actual load (for example, the current rotation speed of the compressor) but also the actual load by the rated value (for example, the rated rotation speed of the compressor). Load factor is also included.
- the air-conditioning hot-water supply system which concerns on this invention is the said structure.
- WHEREIN The 1st threshold value judgment means (for example, step S24) which judges whether the value of the said new air-conditioning load is larger than the predetermined 1st threshold value. And a value of the air conditioning load that becomes the heating rated output or the maximum output of the air conditioning compressor is set as the predetermined first threshold, and the value of the new air conditioning load is determined in advance.
- the assist control means controls the operation of the hot water supply assist means when the first threshold value judging means judges that it is larger than the first threshold value.
- ADVANTAGE OF THE INVENTION According to this invention, it can prevent calculating new power consumption in the range beyond the capability of the compressor for an air conditioning. That is, in the present invention, power consumption can be minimized within a range according to performance.
- the air-conditioning hot-water supply system which concerns on this invention is the said structure.
- WHEREIN The 2nd threshold value judgment means (for example, step S21) which judges whether the value of the said new air-conditioning load is larger than the predetermined 2nd threshold value.
- the air conditioning load serving as a boundary between continuous operation and intermittent operation of the air conditioning compressor, and the new air conditioning load value is
- the air conditioning load calculating unit adds the predetermined value to the calculated new air conditioning load to obtain a new air conditioner.
- the load is calculated again.
- the intermittent operation of the air conditioning compressor can be avoided, so that the system efficiency of the air conditioning cycle can be improved and the load of the hot water supply cycle can also be reduced. Therefore, this invention can improve the efficiency of the whole system and can reduce power consumption.
- the air conditioning hot water supply system based on the value of the new air conditioning load when the new power consumption total value is determined to be smaller than the estimated power consumption total value.
- Air-conditioning target rotational speed determining means for example, means for performing step S26 for determining the target rotational speed of the compressor, and when the new total power consumption value is determined to be smaller than the estimated power consumption total value
- a hot water supply target rotational speed determining means for example, means for performing step S27 for determining a target rotational speed of the hot water supply compressor based on the new hot water supply load value.
- the estimated air conditioning load value is It is characterized by having a correction means (for example, means for performing step S17) for correcting. According to the present invention, since more accurate processing can be performed, further improvement in system efficiency and further reduction in power consumption are expected.
- the air conditioning and hot water supply system according to the present invention is preferably in the following manner. That is, the air-conditioning hot-water supply system according to the present invention has the above-described configuration, and is connected to the air-conditioning refrigerant circuit so as to be capable of exchanging heat.
- the air conditioning refrigerant circuit includes the air conditioning compressor, the air conditioning flow path switching valve, the air conditioning A heat source side heat exchanger for air conditioning for exchanging heat with a heat transfer medium on the heat source side, an expansion valve for air conditioning, a use side heat exchanger for air conditioning for exchanging heat with the heat transfer medium on the air use side Are connected to each other by a refrigerant pipe
- the hot water supply refrigerant circuit is connected to the hot water supply compressor, the hot water use side heat exchanger for exchanging heat with the hot water use side heat transfer medium, and the hot water supply
- a source-side heat exchanger is sequentially connected by refrigerant pipes to form an annular shape
- the air-conditioning heat transfer medium circulation circuit includes an air-conditioning use-side heat exchanger and an indoor heat exchanger installed in the air-
- the hot water supply assisting means is formed in an annular shape by connecting pipes, and the hot water supply assist means exchanges heat between the heat transfer medium on the air conditioning use side and the heat transfer medium on the use side of the hot water supply.
- a flow rate control means for controlling the flow rate of the heat transfer medium on the use side for air conditioning to the hot water supply residual heat heat exchanger, wherein the hot water supply residual heat exchanger is upstream of the hot water supply use side heat exchanger. Is connected to the hot water supply passage on the side, and is connected to the heat transfer medium circulation circuit for air conditioning so as to be in series or parallel with the indoor heat exchanger, and the assist control means has a value of the new air conditioning load.
- the flow control means is controlled so as to approach It is preferable to.
- the air conditioning and hot water supply system in the above-described configuration, includes a hot water supply passage that is connected to the hot water supply refrigerant circuit so as to be capable of exchanging heat, and through which the heat transfer medium on the hot water supply side flows.
- An air-conditioning use-side heat exchanger for exchanging heat with the medium is formed in an annular shape by sequentially connecting with refrigerant pipes, and the hot-water supply refrigerant circuit includes the hot-water supply compressor and the hot-water supply-use heat transfer medium.
- the heat exchanger for hot water supply that performs heat exchange with the heat exchanger, the expansion valve for hot water supply, and the heat transfer medium for hot water supply for heat exchange with the heat transfer medium for hot water supply are connected in an annular fashion by sequentially connecting them with refrigerant piping.
- the hot water supply assist means is formed by air conditioning flowing through the air conditioning refrigerant circuit.
- a hot water supply residual heat heat exchanger that exchanges heat between the refrigerant and the heat transfer medium on the use side for hot water supply, and a flow rate control means that controls the flow rate of the air conditioning refrigerant flowing to the hot water supply residual heat heat exchanger
- the hot water residual heat heat exchanger is connected to the hot water supply channel upstream of the hot water use side heat exchanger and is connected in series or in parallel with the air conditioning use side heat exchanger. It is preferable that the assist control means is connected to a refrigerant circuit and controls the operation of the flow rate control means so as to approach the value of the new air conditioning load.
- an air conditioning heat transfer medium circulation circuit that is connected to the air conditioning refrigerant circuit in a heat exchangeable manner and circulates a heat transfer medium on the air conditioning use side, and the hot water supply.
- An intermediate heat exchanger capable of exchanging heat between the three circuits of the refrigerant circuit for hot water, the refrigerant circuit for hot water supply, and the intermediate heat medium circuit, and the refrigerant circuit for air conditioning includes the compressor for air conditioning, the air conditioning A flow path switching valve, an air conditioning heat source side heat exchanger for exchanging heat with an air conditioning heat source side heat exchanger, an air conditioning expansion valve, and for exchanging heat with the air conditioning use side heat transfer medium Connect the use side heat exchangers for air conditioning sequentially with refrigerant piping.
- the hot water supply refrigerant circuit includes a hot water supply compressor, a hot water use side heat exchanger for exchanging heat with the hot water use side heat transfer medium, a hot water supply expansion valve, and a hot water supply heat source side.
- a heat supply side heat exchanger for hot water supply for heat exchange with the heat transfer medium is formed in an annular shape by sequentially connecting with refrigerant pipes, and the heat transfer medium circulation circuit for air conditioning is connected to the use side heat exchanger for air conditioning and the target.
- An indoor heat exchanger installed in an air-conditioned space is connected to a pipe to form an annular shape, and the hot water supply assist means exchanges heat between the heat transfer medium on the air-conditioning use side and the intermediate heat medium
- a flow rate control means for controlling the flow rate of the heat transfer medium on the air conditioning utilization side flowing to the hot water remaining heat heat exchanger includes the intermediate heat exchange Connected to the intermediate heat medium circuit upstream of the heater, and
- the air conditioning heat transfer medium circulation circuit is connected in series or in parallel with the internal heat exchanger, and the assist control means controls the operation of the flow rate control means so as to approach the value of the new air conditioning load. It is preferable to do.
- the burden due to the air conditioning cycle operation is increased, but the burden of the hot water supply cycle operation is reduced, so the efficiency of the entire air conditioning and hot water supply system is improved. , Power consumption is reduced.
- FIG. 1 is a system diagram of an air conditioning and hot water supply system according to a first embodiment of the present invention. It is a flowchart which shows the procedure of the determination process of the control mode of the air-conditioning hot-water supply system shown in FIG. It is a flowchart which shows the procedure of the process in the assist control mode of the air conditioning hot-water supply system shown in FIG. 1, and is a flowchart which shows the continuation of FIG. It is a flowchart which shows the procedure of the process in the assist control mode of the air-conditioning hot-water supply system shown in FIG. 1, and is a flowchart which shows the continuation of FIG.
- FIG. 5 is a flowchart showing a processing procedure in an assist control mode of the air conditioning and hot water supply system shown in FIG.
- FIG. 1 is a flowchart showing a continuation of FIG. 4. It is the figure which showed the detail of the data structure of the table 1 shown in FIG. It is the figure which showed the detail of the data structure of the table 2 shown in FIG. It is the figure which showed the detail of the data structure of the table 3 shown in FIG. It is the figure which showed the detail of the data structure of the table 4 shown in FIG. It is the figure which showed the detail of the data structure of the table 5 shown in FIG. It is the figure which showed the detail of the data structure of the table 6 shown in FIG. It is the figure which showed the detail of the data structure of the table 7 shown in FIG. It is the figure which showed the detail of the data structure of the table 8 shown in FIG.
- the operation mode No. of the air conditioning and hot water supply system shown in FIG. 2 is an operation diagram showing the flow of the refrigerant and the heat transfer medium in FIG.
- the operation mode No. of the air conditioning and hot water supply system shown in FIG. 6 is an operation diagram showing the flow of the refrigerant and the heat transfer medium in FIG.
- the operation mode No. of the air conditioning and hot water supply system shown in FIG. 3 is an operation diagram showing the flow of the refrigerant and the heat transfer medium in FIG.
- the air conditioning and hot water supply system drives an air conditioning compressor 21 to switch between a cooling operation and a heating operation to perform an operation.
- a hot water supply refrigerant circuit 6 that drives the hot water supply compressor 41 to perform a hot water supply operation
- an air conditioning refrigerant circuit 5 that performs heat exchange with the air conditioning refrigerant circuit 5 and performs air conditioning in the house (air-conditioned space) 60.
- a water circulation circuit (heat transfer medium circulation circuit for air conditioning) 8 a hot water supply passage 9 that performs hot water exchange with the hot water supply refrigerant circuit 6, and a control device 1 a that controls operation are provided.
- the air-conditioning hot-water supply system according to the first embodiment of the present invention has a unit configuration including a heat pump unit 1 arranged outside and an indoor unit 2 arranged indoors.
- the heat pump unit 1 includes an air conditioning refrigerant circuit 5, a hot water supply refrigerant circuit 6, an air conditioning cold / hot water circulation circuit 8, a hot water supply passage 9, and a control device 1a. Further, a hot water supply residual heat exchanger (hot water supply assisting means) 80 is disposed between the cold / hot water circulation circuit 8 for air conditioning and the hot water supply passage 9. This hot water supply residual heat exchanger 80 has a structure capable of exchanging heat between water flowing through the cold / hot water circulation circuit 8 for air conditioning and water flowing through the hot water supply passage 9.
- the air conditioning refrigerant circuit 5 is a circuit in which a refrigeration cycle (air conditioning cycle) is formed by circulating the air conditioning refrigerant.
- the air conditioning compressor 21 that compresses the air conditioning refrigerant, and the four ways of switching the flow path of the air conditioning refrigerant A valve (air-conditioning flow path switching valve) 22, an air-conditioning heat source side heat exchanger 24 that exchanges heat with the air sent by a fan (not shown), an air-conditioning refrigerant tank 26, and an air-conditioning that depressurizes the air-conditioning refrigerant.
- the expansion valve 27 for air conditioning and the cold / hot water circulation circuit 8 for air conditioning are connected to each other by an air-conditioning use-side heat exchanger 28 that exchanges heat with a refrigerant pipe.
- an air-conditioning refrigerant suitable for use conditions is used among R410a, R134a, HFO1234yf, HFO1234ze, and CO2.
- the air conditioning compressor 21 is a variable capacity compressor capable of capacity control.
- a compressor a piston type, a rotary type, a scroll type, a screw type, or a centrifugal type can be adopted.
- the air conditioning compressor 21 is a scroll type compressor, and capacity control is possible by inverter control, and the rotation speed is variable from low speed to high speed.
- the air-conditioning use-side heat exchanger 28 is in thermal contact with an air-conditioning refrigerant heat transfer tube through which the air-conditioning refrigerant flows and an air-conditioning cold / hot water heat transfer tube through which water (a heat transfer medium on the air-conditioning use side) flows. Is configured to do.
- the air conditioning refrigerant tank 26 has a function as a buffer that controls the amount of the air conditioning refrigerant that is changed by switching the flow path of the air conditioning refrigerant circuit 5.
- the air conditioning expansion valve 27 can reduce the pressure of the air conditioning refrigerant to a predetermined pressure by adjusting the opening of the valve.
- the air conditioning cold / hot water circulation circuit (air conditioning heat transfer medium circulation circuit) 8 is a circuit through which water flows as a heat transfer medium on the air conditioning use side for exchanging heat with the air conditioning refrigerant circuit 5.
- the cold / hot water circulating pump 52 and the indoor heat exchanger 61 installed in the house (air-conditioned space) 60 are connected by an air-conditioning cold / hot water pipe 55a, and the indoor heat exchanger 61 and the four-way valve 22 are connected to the cold / hot water pipe for air conditioning.
- the circuit is formed in an annular shape by connecting the four-way valve 53 and the air-conditioning use-side heat exchanger 28 with an air-conditioning cold / hot water pipe 55c.
- Water (cold water or hot water) flowing through the air-conditioning cold / hot water circulation circuit 8 exchanges heat with the air in the house 60 via the indoor heat exchanger 61 to cool or heat the house 60.
- a brine such as ethylene glycol may be used in place of water as the heat transfer medium on the air conditioning use side that flows in the cold / hot water circulation circuit 8 for air conditioning.
- the use of brine can be applied even in cold regions.
- cold water or “warm water” may be used as the water flowing through the air-conditioning cold / hot water circulation circuit 8.
- the term “cold water” refers to water flowing through the air-conditioning cold / hot water circulation circuit 8 during cooling. It is added here that the term “warm water” is used to mean the water flowing through the air conditioning cold / hot water circulation circuit 8 during heating.
- the hot / cold hot water circulation circuit 8 for air conditioning is connected to a hot water supply residual heat exchanger 80 so as to be in parallel with the indoor heat exchanger 61.
- a three-way valve (flow control means, hot water supply assist means) 54a provided at a position near the inlet of the indoor heat exchanger 61 of the cold / hot water pipe 55a for air conditioning and the inlet of the heat exchanger 80 for hot water supply are used for air conditioning.
- a three-way valve (flow rate control means, hot water supply assist means) 54b provided at a position near the outlet of the indoor heat exchanger 61 of the cold / hot water pipe 55b for air conditioning and an outlet of the hot water heat exchanger 80 are connected by the cold / hot water pipe 56a.
- the air conditioning cold / hot water circulation circuit 8 is formed with two flow paths, a flow path through which the water flows through the indoor heat exchanger 61 and a flow path through which the hot water supply residual heat heat exchanger 80 flows.
- the hot water supply residual heat exchanger 80 and the three-way valves 54a and 54b correspond to the hot water supply assist means of the present invention.
- the hot water supply refrigerant circuit 6 is a circuit in which a refrigeration cycle (hot water supply cycle) is formed by circulating the hot water supply refrigerant, and performs heat exchange with the hot water supply compressor 41 that compresses the hot water supply refrigerant and the hot water supply passage 9.
- a hot water supply heat source side heat exchanger 44 that exchanges heat with the air that is sent is connected by a refrigerant pipe to form an annular shape.
- a refrigerant suitable for use conditions is selected from R410a, R134a, HFO1234yf, HFO1234ze, and CO2.
- the hot water supply compressor 41 can perform capacity control by inverter control similarly to the air conditioning compressor 21, and the rotation speed is variable from low speed to high speed.
- the hot water supply side heat exchanger 42 is in such a manner that a hot water supply water heat transfer pipe through which water supplied to the hot water supply passage 9 flows and a hot water supply refrigerant heat transfer pipe through which hot water supply refrigerant flows are in thermal contact. It is configured.
- the hot water supply expansion valve 43 can reduce the pressure of the hot water supply refrigerant to a predetermined pressure by adjusting the opening of the valve.
- the hot water supply channel 9 connects the inlet of the hot water use side heat exchanger 42 and the water supply port 78 with a hot water supply pipe 72, and connects the outlet of the hot water use side heat exchanger 42 and the hot water supply port 79 with a hot water supply pipe 73.
- a hot water supply residual heat exchanger 80 is formed at a position upstream of the hot water use side heat exchanger 42 in the hot water supply pipe 72.
- a two-way valve 74 a is attached to a position in the vicinity of the outlet of the hot water supply residual heat exchanger 80 of the hot water supply pipe 72.
- the hot water supply pipe 72 is provided with a hot water supply bypass pipe 75 that bypasses the hot water supply residual heat exchanger 80.
- the hot water supply bypass pipe 75 is provided with a two-way valve 74b.
- the hot water supply channel 9 the water that flows into the water supply port 78 passes through the hot water supply residual heat exchanger 80, and then flows out of the hot water supply port 79 through the hot water use side heat exchanger 42. Then, the water that has flowed into the water supply port 78 flows through the hot water supply bypass pipe 75, passes through the hot water supply use side heat exchanger 42, and forms two flow paths that flow out of the hot water supply port 79.
- the water (hot water) which flowed out from the hot water supply port 79 is supplied to the hot water supply load side (a bathtub, a washroom, a kitchen, etc.).
- the hot water flow path 9 incorporates a flow rate sensor that detects the flow rate of water.
- This air conditioning and hot water supply system includes a plurality of temperature sensors TH1 to TH5.
- the temperature sensor TH4 is provided at the inlet of the air conditioning use side heat exchanger 28 during the heating operation, and the temperature sensor TH4 is provided at the outlet during the heating operation of the air conditioning use side heat exchanger 28.
- the sensor TH3 is provided with a temperature sensor TH5 at the outlet of the indoor heat exchanger 61, respectively.
- the hot water supply passage 9 is provided with a temperature sensor TH2 at the inlet of the hot water use side heat exchanger 42 and a temperature sensor TH1 at the water supply port 78, respectively.
- a temperature sensor (not shown) for measuring the outside air temperature is also provided.
- the air conditioning compressor 21 is provided with a rotation speed detection sensor RA for detecting the rotation speed.
- the hot water supply compressor 41 is provided with a rotation speed detection sensor RH.
- the air conditioning expansion valve 27 is provided with a valve opening degree detection sensor PA for detecting the opening degree of the valve, and the hot water supply expansion valve 43 is provided with a valve opening degree detection sensor PH for detecting the opening degree of the valve. Yes.
- the three-way valves 54a and 54b are also provided with valve opening degree detection sensors VO1 and VO2, respectively.
- the control device 1a inputs command signals from a remote controller (not shown), temperature sensors TH1 to TH5, rotation speed detection sensors RA and RH, valve opening detection sensors PA, PH, VO1, and VO2, and the like. Based on the input signal, driving / stopping of the air conditioning compressor 21 and the hot water supply compressor 41, switching of the four-way valves 22 and 53, adjustment of the opening degrees of the air conditioning expansion valve 27 and the hot water supply expansion valve 43, three-way Control necessary for switching the valves 54a and 54b, driving / stopping the air-conditioning cold / hot water circulation pump 52, opening and closing the two-way valves 74a and 74b, and other operations of the air-conditioning hot-water supply system is performed.
- control device 1a determines whether or not there is a request for heating by an air conditioning cycle (step S1). When it is determined that there is a heating request (Yes in step S1), control device 1a determines whether or not the hot water supply cycle is in operation (step S2). If the control device 1a determines that the hot water supply cycle is in operation (Yes in step S2), the control device 1a proceeds to step S3 and executes a determination process for determining whether or not to perform assist control.
- step S3 the control device 1a determines whether to shift to the assist operation mode for performing the hot water supply assist operation by the assist control means or the normal operation mode for performing the normal operation. And the control apparatus 1a starts the operation control of an air-conditioning cycle and a hot water supply cycle in the determined operation mode.
- control device 1a proceeds to step S7 and waits for a predetermined time. And it returns to step S1 again and performs the process after step S1. If it is determined in step S2 that the hot water supply cycle is not in operation (No in step S2), control device 1a proceeds to step S4 and performs independent control of the air conditioning cycle.
- step S1 determines whether there is a request for hot water supply cycle operation.
- step S5 determines whether there is a request for hot water supply cycle operation.
- control device 1a proceeds to step S6 and performs independent control of the hot water supply cycle.
- step S7 After waiting for a certain time in step S7, the control device 1a returns to step S1 and performs the processing after step S1.
- control device 1a proceeds to step S8 and executes an end process.
- the control device 1a refers to the table 1 and estimates the current value of the air conditioning load Qa.
- the table 1 includes an air-conditioning compressor 21 for each use-side target temperature (target value of hot water outlet temperature, target value of temperature measured by the temperature sensor TH3) and heat source temperature (outside air temperature).
- the control device 1a refers to the table 3 and estimates the current value of the air-conditioning power consumption Wa.
- the table 3 shows the rotation speed (the value of the rotation speed detection sensor RA) of the air conditioning compressor 21 for each use-side target temperature (hot water outlet temperature target value) and heat source temperature (outside air temperature).
- 6 is a data table in which pulses of the air conditioning expansion valve 27 (value of the valve opening detection sensor PA) and air conditioning power consumption Wa are associated in advance. The air-conditioning power consumption stored in the table 3 can be substituted with the current value in the control panel.
- the control device 1a refers to the table 2 and estimates the current hot water supply load Qh.
- the table 2 shows the number of rotations of the hot water supply compressor 41 (the value of the rotation speed detection sensor RH) and the hot water supply for each use-side target temperature (hot water supply temperature target value) and heat source temperature (outside air temperature). It is a data table in which the pulse of the expansion valve 43 (value of the valve opening detection sensor PH) and the hot water supply load Qh are associated in advance.
- the control device 1a refers to the table 4 and estimates the current hot water supply power consumption Wh.
- the table 4 shows the number of rotations of the hot water supply compressor 41 (value of the rotation speed detection sensor RH) and hot water supply for each use side target temperature (hot water supply temperature target value) and heat source temperature (outside air temperature).
- 4 is a data table in which a pulse of the expansion valve 43 (value of the valve opening detection sensor PH) and hot water supply power consumption (Wh) are associated in advance. Note that the hot water supply power consumption stored in the table 4 can be replaced with the current value in the control panel.
- step S14 the control device 1a stores the total value of the estimated air conditioning power consumption value (Wa) and the estimated hot water supply power consumption (Wh) as the estimated power consumption total value (W '). To do.
- step S15 the control device 1a determines whether or not a hot water supply assist operation described later is currently being performed.
- the process proceeds to step S16, and the control device 1a converts the air conditioning load (Qa) estimated in step S10 into the air conditioning load (Q ').
- a provisional decision is made.
- the control device 1a air-conditions the value obtained by correcting the value of the air conditioning load (Qa) estimated in step S10.
- the load (Q′a) is provisionally determined.
- a correction coefficient ⁇ ⁇ estimated air conditioning load (Qa) determined from (measured value of temperature sensor TH4) / valve opening (VO1, VO2) is obtained, and the obtained value is used as a corrected air conditioning load (Qa ′).
- ⁇ f (VO1, VO2).
- step S18 the control device 1a calculates a new air conditioning load value (Qb) by adding a predetermined value ( ⁇ Q) to the temporarily determined air conditioning load value (Qa '). And the control apparatus 1a calculates air-conditioning power consumption (Wb) with reference to the table 5 based on the value (Qb) of a new air-conditioning load.
- the table 5 indicates that the heat source temperature (outside air temperature), the air conditioning output (Qb), and the air conditioning power consumption (Wb) are preset for each use side target temperature (warm water outlet temperature target value). It is the associated data table.
- step S19 the control device 1a subtracts a new air conditioning load value (Qb) from a value obtained by adding the estimated hot water supply load value (Qh) to the estimated air conditioning load value (Qa). Then, a new hot water supply load value (Qi) is calculated.
- step S20 the control device 1a refers to the table 6 and calculates new hot water supply power consumption (Wi) based on the new hot water supply load value (Qi).
- the heat source temperature outside air temperature
- the hot water supply output Qi
- the hot water supply power consumption Wi
- Qb_low_limit is set to the value of the air conditioning load that becomes the boundary between the continuous operation and intermittent operation of the air conditioning compressor 21, that is, the load factor L2 (see FIG. 14A). Therefore, it is possible to avoid operating the air conditioning compressor 21 in the intermittent operation region by performing the process of step S21.
- step S22 the control device 1a calculates an estimated power consumption total value (W ′) obtained by summing the estimated air conditioning power consumption value (Wa) and the estimated hot water supply power consumption value (Wh). Then, a new power consumption total value (W) obtained by adding the new air conditioning power consumption value (Wb) and the new hot water supply power consumption (Wi) value is compared.
- W ′ estimated power consumption total value obtained by summing the estimated air conditioning power consumption value (Wa) and the estimated hot water supply power consumption value (Wh). Then, a new power consumption total value (W) obtained by adding the new air conditioning power consumption value (Wb) and the new hot water supply power consumption (Wi) value is compared.
- the predetermined threshold value (Qb_Limit) is set to the value of the air conditioning load at which the heating rated output or the maximum output of the air conditioning compressor 21 is set, the new output exceeds the maximum output of the air conditioning cycle. It is possible to prevent the estimation of the power consumption Qb.
- the control device 1a refers to the table 7 and determines the target rotational speed (Ra) of the air conditioning compressor 21 from the new air conditioning load (Qb).
- the table 7 shows the target rotational speed of the air conditioning compressor 21 for the heat source temperature (outside air temperature) and the air conditioning output (Qb) for each use side target temperature (warm water outlet temperature target value). It is a data table associated in advance.
- step S27 the control device 1a refers to the table 8 and determines the target rotational speed (Rh) of the hot water supply compressor 41 from the new hot water supply load (Qi).
- the table 8 indicates that the target rotation speed of the hot water supply compressor 41 with respect to the heat source temperature (outside air temperature) and the hot water supply output (Qi) is preset for each use side target temperature (hot water supply temperature target value). It is the associated data table.
- step S28 the control device 1a opens the two-way valve 74a so as to approach the new air conditioning load value (Qb) set as the target load, and supplies the hot water supply residual heat exchanger 80 with the water supply port 78.
- the hot water flowing through the air-conditioning cold / hot water circulation circuit 8 is allowed to flow through the hot water supply residual heat exchanger 80 while adjusting the opening of the ports of the three-way valve 54a and the three-way valve 54b and controlling the flow rate. That is, a hot water supply assist operation is performed.
- control device 1a controls (i) to operate the rotational speed of the air conditioning compressor 21 at the target rotational speed (Ra) during the hot water supply assist operation, and (ii) the three-way valve 54a,
- PI control is performed so that the opening degree of each port 54b becomes a target value of the air-conditioning use side outlet temperature (temperature of the temperature sensor TH3)
- the valve opening degree of the air-conditioning expansion valve 27 is
- the compressor 21 is controlled so as to have a target value of the suction temperature (or discharge temperature is acceptable), and (iv) after a certain time has passed, the opening of the three-way valves 54a and 54b at that time is fixed, and the air conditioning compressor
- the number of rotations 21 is controlled to be the target value of the air-conditioning utilization side outlet temperature.
- the above-described table should be created with the minimum number of revolutions or more determined by the characteristics of the air conditioning compressor 21. It ’s fine.
- the means for performing the process of step S10 corresponds to the air conditioning load estimating means of the present invention
- the means for performing the process of step S11 corresponds to the air conditioning power consumption estimating means of the present invention
- the means for performing the process of step S12 corresponds to the hot water supply load estimating means of the present invention
- the means for performing the process of step S13 corresponds to the hot water supply power consumption estimating means of the present invention
- the means for performing the process of step S16 is the present.
- the means for performing the air conditioning load provisional determination means of the invention, the means for performing the process of step S17 corresponds to the correcting means of the present invention, and the means for performing the process of step S18 to the air conditioning load calculating means and the air conditioning power consumption calculating means of the present invention
- the means for performing the process of step S19 corresponds to the hot water supply load calculating means of the present invention
- the means for performing the process of step S20 corresponds to the hot water supply power consumption calculating means of the present invention.
- the means for performing the process of step S21 corresponds to the second threshold value determining means of the present invention
- the means for performing the process of step S22 corresponds to the power consumption comparing means of the present invention
- the means for performing the process of step S24 corresponds to the second threshold value determining means of the present invention
- the means for performing the process of step S26 corresponds to the first threshold value determining means of the present invention, the means for determining the target rotation speed for air conditioning of the present invention, and the means for performing the process of step S27 is the target rotation for hot water supply of the present invention.
- the means for performing the processing in step S28 corresponds to the number determining means and corresponds to the assist control means of the present invention.
- FIG. 14 shows a load factor-power consumption curve of the air conditioning compressor 21 and a load factor-power consumption curve of the hot water supply compressor 41.
- FIG. 14A shows how the power consumption changes when the hot water supply assist operation is performed when the air conditioning compressor 21 is operated in the intermittent operation region.
- the air-conditioning state before the hot water supply assist operation is P1
- the power consumption is reduced. It only takes E2.
- the air conditioning load is increased from L1 to L2 by the hot water supply assist operation
- the state P1 moves on the curve and becomes the state P2.
- the power consumption is only E1. Therefore, although the load factor has increased from L1 to L2 by the hot water supply assist operation, the power consumption has decreased from E2 to E1.
- the load of the hot water supply cycle is reduced. Therefore, if the state of the hot water supply side prior to the hot water supply assist operation is P4, the state moves from P4 on the curve to P3 by performing the hot water supply assist operation, and the load factor decreases from L4 to L3. The power consumption is reduced from E4 to E3. Therefore, by performing the hot water supply assist operation, the power consumption is reduced by the decrease of E2-E1 and the decrease of E4-E3.
- FIG. 14B shows how the power consumption changes when the hot water supply assist operation is performed when the air conditioning compressor 21 is operated in the continuous operation region.
- the state on the air conditioning side before the hot water supply assist operation is P11
- the power consumption is applied by E11 in this P11.
- the state on the air conditioning side changes from P11 to P21, and the load factor on the air conditioning side increases from L11 to L21. Therefore, the power consumption on the air conditioning side increases from E11 to E21.
- the load of the hot water supply cycle is reduced.
- the state of the hot water supply side before the hot water supply assist operation is P41
- the state moves on the curve from P41 to P31 by performing the hot water assist operation, and the load factor decreases from L41 to L31.
- the power consumption is reduced from E41 to E31.
- the increase in the power consumption of E21-E11 and the decrease in the power consumption of E41-E31 the decrease is greater, so the power consumption in the entire air conditioning and hot water supply system is reduced.
- control device 1a can be controlled to perform the hot water supply assist operation described above, as shown in FIG. Reduction can be realized.
- FIGS. 15 to 17 the arrows attached to the heat exchangers indicate the flow of heat, and the arrows attached to the circuits 5, 6, 8 and 9 indicate the direction in which the fluid flows through the circuits.
- the white two-way valve indicates an open state
- the black two-way valve indicates a closed state.
- the white three-way valve indicates that all three ports are open. Two of the three ports are white and the remaining one is black.
- the three-way valve is white and the white port is open. Indicates that the port is closed.
- An arc-shaped solid line drawn on the four-way valve indicates a flow path of the fluid flowing through the four-way valve. Further, the route indicated by the dotted line in FIGS. 15 to 17 indicates that the route is not used in the operation mode shown in the drawing, that is, the route is closed.
- Operation mode No. 1 denotes an operation mode in which a cooling operation by the air conditioning refrigerant circuit 5 and a hot water supply operation by the hot water supply refrigerant circuit 6 are performed.
- the high-temperature and high-pressure gas refrigerant discharged from the discharge port 21 b of the air-conditioning compressor 21 passes through the four-way valve 22 and flows into the air-conditioning heat source side heat exchanger 24.
- the high-temperature and high-pressure gas refrigerant flowing in the air-conditioning heat source side heat exchanger 24 dissipates heat to the atmosphere, condenses, and liquefies.
- This high-pressure liquid refrigerant flows through the air-conditioning refrigerant tank 26 and then is decompressed and expanded by the air-conditioning expansion valve 27 adjusted to a predetermined opening degree to become a low-temperature and low-pressure gas-liquid two-phase refrigerant. It flows into the exchanger 28.
- the gas-liquid two-phase refrigerant flowing in the air-conditioning use-side heat exchanger 28 absorbs heat from the high-temperature cold water flowing in the air-conditioning cold / hot water circulation circuit 8 and evaporates to become a low-pressure gas refrigerant.
- the low-pressure gas refrigerant passes through the four-way valve 22 and flows into the suction port 21a of the air-conditioning compressor 21, and is compressed again by the air-conditioning compressor 21 to become a high-temperature and high-pressure gas refrigerant.
- the cold water radiated to the air conditioning refrigerant flowing through the air conditioning use-side heat exchanger 28 drives the air conditioning cold / hot water circulation pump 52, passes through the air conditioning cold / hot water pipe 55 a, and It flows into the heat exchanger 61.
- the indoor heat exchanger 61 heat exchange is performed between the cold water in the cold / hot water circulation circuit 8 for air conditioning and the high-temperature air in the house 60, and the air in the house 60 is cooled. That is, the room of the house 60 is cooled. At this time, the cold water flowing through the indoor heat exchanger 61 absorbs heat from the air in the house 60 and is heated.
- the raised cold water flows through the air conditioning cold / hot water pipes 55b and 55c by the air conditioning cold / hot water circulation pump 52, and again flows through the air conditioning refrigerant circuit 5 while flowing through the air conditioning use-side heat exchanger 28. It is cooled by exchanging heat with the refrigerant.
- the gas refrigerant compressed to a high temperature and high pressure by the hot water supply compressor 41 flows into the hot water use side heat exchanger 42.
- the high-temperature and high-pressure gas refrigerant flowing in the hot water use side heat exchanger 42 radiates heat to the water flowing in the hot water supply passage 9 and condenses and liquefies.
- the liquefied high-pressure refrigerant flows through the hot water supply refrigerant tank 46 and then is decompressed and expanded by the hot water supply expansion valve 43 adjusted to a predetermined opening degree, and becomes a low-temperature low-pressure gas-liquid two-phase refrigerant.
- This gas-liquid two-phase refrigerant absorbs heat from the atmosphere and evaporates while flowing through the hot water supply heat source side heat exchanger 44 to become a low-pressure gas refrigerant.
- This low-pressure gas refrigerant flows into the suction port 41a of the hot water supply compressor 41 and is compressed again by the hot water supply compressor 41 to become a high-temperature high-pressure gas refrigerant.
- the water flowing into the water supply port 78 flows to the hot water use side heat exchanger 42 via the hot water supply bypass pipe 75.
- the water flowing into the hot water use side heat exchanger 42 absorbs heat from the hot water supply refrigerant flowing through the hot water supply refrigerant circuit 6 in the hot water use side heat exchanger 42 and changes to hot water.
- This hot water flows out from the hot water supply port 78 and is guided to the hot water supply load side.
- the operation mode No. 1 in the cold / hot water circulation circuit 8 for air conditioning, the flow path flowing to the hot water supply residual heat exchanger 80 is closed by the three-way valves 54a and 54b. In addition, also in the hot water supply flow path 9, the flow path to the hot water supply residual heat exchanger 80 is closed by the two-way valve 74a. Therefore, heat exchange between the water flowing through the cold / hot water circulation circuit 8 for air conditioning and the water flowing through the hot water supply passage 9 by the hot water supply residual heat exchanger 80 is not performed.
- Operation mode No. 2 denotes a mode in which heating operation by the air conditioning refrigerant circuit 5 and hot water supply operation by the hot water supply refrigerant circuit 6 are performed.
- the high-temperature and high-pressure gas refrigerant discharged from the discharge port 21 b of the air-conditioning compressor 21 passes through the four-way valve 22 and flows into the air-conditioning use-side heat exchanger 28.
- the high-temperature and high-pressure gas refrigerant flowing in the air-conditioning use-side heat exchanger 28 dissipates heat to the hot water flowing in the air-conditioning cold / hot water circuit 8 and condenses and liquefies.
- This high-pressure liquid refrigerant is decompressed and expanded by the air conditioning expansion valve 27 adjusted to a predetermined opening degree, becomes a low-temperature and low-pressure gas-liquid two-phase refrigerant, passes through the air conditioning refrigerant tank 26, and performs heat exchange on the heat source side for air conditioning. Flows into the vessel 24.
- the gas-liquid two-phase refrigerant flowing in the air-conditioning heat source side heat exchanger 24 absorbs heat from the atmosphere and evaporates to become a low-pressure gas refrigerant.
- the low-pressure gas refrigerant passes through the four-way valve 22 and flows into the suction port 21a of the air-conditioning compressor 21, and is compressed again by the air-conditioning compressor 21 to become a high-temperature and high-pressure gas refrigerant.
- the hot water heated by absorbing heat from the air-conditioning refrigerant flowing through the air-conditioning use-side heat exchanger 28 drives the air-conditioning cold / hot water circulation pump 52, whereby the air-conditioning cold / hot water pipe 55a. And flows into the indoor heat exchanger 61.
- the indoor heat exchanger 61 heat exchange is performed between the hot water in the cold / hot water circulation circuit 8 for air conditioning and the low-temperature air in the house 60, and the air in the house 60 is heated. That is, the room of the house 60 is heated. At this time, the hot water flowing through the indoor heat exchanger 61 is cooled by releasing heat to the air in the house 60.
- the cooled hot water flows through the air conditioning cold / hot water pipes 55b and 55c by the air conditioning cold / hot water circulation pump 52, and again flows through the air conditioning refrigerant circuit 5 while flowing through the air conditioning use-side heat exchanger 28.
- the temperature is raised through heat exchange.
- the gas refrigerant compressed to a high temperature and high pressure by the hot water supply compressor 41 flows into the hot water use side heat exchanger 42.
- the high-temperature and high-pressure gas refrigerant flowing in the hot water use side heat exchanger 42 radiates heat to the water flowing in the hot water supply passage 9 and condenses and liquefies.
- the liquefied high-pressure refrigerant flows through the hot water supply refrigerant tank 46 and then is decompressed and expanded by the hot water supply expansion valve 43 adjusted to a predetermined opening degree, and becomes a low-temperature low-pressure gas-liquid two-phase refrigerant.
- This gas-liquid two-phase refrigerant absorbs heat from the atmosphere and evaporates while flowing through the hot water supply heat source side heat exchanger 44 to become a low-pressure gas refrigerant.
- This low-pressure gas refrigerant flows into the suction port 41a of the hot water supply compressor 41 and is compressed again by the hot water supply compressor 41 to become a high-temperature high-pressure gas refrigerant.
- the water flowing into the water supply port 78 flows to the hot water use side heat exchanger 42 via the hot water supply bypass pipe 75.
- the water flowing into the hot water use side heat exchanger 42 absorbs heat from the hot water supply refrigerant flowing through the hot water supply refrigerant circuit 6 in the hot water use side heat exchanger 42 and changes to hot water.
- This hot water flows out from the hot water supply port 78 and is guided to the hot water supply load side.
- the operation mode No. 2 in the cold / hot water circulation circuit 8 for air conditioning, the flow path to the hot water supply residual heat exchanger 80 is closed by the three-way valves 54a and 54b. In addition, also in the hot water supply flow path 9, the flow path to the hot water supply residual heat exchanger 80 is closed by the two-way valve 74a. Therefore, heat exchange between the water flowing through the cold / hot water circulation circuit 8 for air conditioning and the water flowing through the hot water supply passage 9 by the hot water supply residual heat exchanger 80 is not performed.
- Operation mode No. 3 denotes a mode in which the heating operation by the air conditioning refrigerant circuit 5 performs the hot water supply assist operation while bearing a part of the load of the hot water supply operation by the hot water supply refrigerant circuit 6.
- the high-temperature and high-pressure gas refrigerant discharged from the discharge port 21 b of the air-conditioning compressor 21 passes through the four-way valve 22 and flows into the air-conditioning use-side heat exchanger 28.
- the high-temperature and high-pressure gas refrigerant flowing in the air-conditioning use-side heat exchanger 28 dissipates heat to the hot water flowing in the air-conditioning cold / hot water circuit 8 and condenses and liquefies.
- This high-pressure liquid refrigerant is decompressed and expanded by the air conditioning expansion valve 27 adjusted to a predetermined opening degree, becomes a low-temperature and low-pressure gas-liquid two-phase refrigerant, passes through the air conditioning refrigerant tank 26, and performs heat exchange on the heat source side for air conditioning. Flows into the vessel 24.
- the gas-liquid two-phase refrigerant flowing in the air-conditioning heat source side heat exchanger 24 absorbs heat from the atmosphere and evaporates to become a low-pressure gas refrigerant.
- the low-pressure gas refrigerant passes through the four-way valve 22 and flows into the suction port 21a of the air-conditioning compressor 21, and is compressed again by the air-conditioning compressor 21 to become a high-temperature and high-pressure gas refrigerant.
- the hot water heated by absorbing heat from the air-conditioning refrigerant flowing through the air-conditioning use-side heat exchanger 28 drives the air-conditioning cold / hot water circulation pump 52, whereby the air-conditioning cold / hot water pipe 55a. And flows into the indoor heat exchanger 61.
- the indoor heat exchanger 61 heat exchange is performed between the hot water in the cold / hot water circulation circuit 8 for air conditioning and the low-temperature air in the house 60, and the air in the house 60 is heated. That is, the room of the house 60 is heated. At this time, the hot water flowing through the indoor heat exchanger 61 is cooled by releasing heat to the air in the house 60.
- the hot water branched from the three-way valve 54a to the air-conditioning cold / hot water pipe 56a flows to the hot water hot water residual heat exchanger 80, and radiates heat to the water flowing through the hot water hot water passage 9 in the hot water hot water residual heat exchanger 80. .
- the hot water radiated and cooled passes through the air conditioning cold / hot water pipe 56b, enters the three-way valve 54b, merges with the hot water flowing out from the indoor heat exchanger 61, and is cooled by the air conditioning cold / hot water circulation pump 52.
- the temperature is raised by flowing through the pipes 55b and 55c and exchanging heat with the air-conditioning refrigerant flowing through the air-conditioning refrigerant circuit 5 while flowing through the air-conditioning use-side heat exchanger 28 again.
- the gas refrigerant compressed to a high temperature and high pressure by the hot water supply compressor 41 flows into the hot water use side heat exchanger 42.
- the high-temperature and high-pressure gas refrigerant flowing in the hot water use side heat exchanger 42 radiates heat to the water flowing in the hot water supply passage 9 and condenses and liquefies.
- the liquefied high-pressure refrigerant flows through the hot water supply refrigerant tank 46 and then is decompressed and expanded by the hot water supply expansion valve 43 adjusted to a predetermined opening degree, and becomes a low-temperature low-pressure gas-liquid two-phase refrigerant.
- This gas-liquid two-phase refrigerant absorbs heat from the atmosphere and evaporates while flowing through the hot water supply heat source side heat exchanger 44 to become a low-pressure gas refrigerant.
- This low-pressure gas refrigerant flows into the suction port 41a of the hot water supply compressor 41 and is compressed again by the hot water supply compressor 41 to become a high-temperature high-pressure gas refrigerant.
- the water flowing into the water supply port 78 flows separately into the hot water supply bypass pipe 75 and the hot water supply residual heat exchanger 80.
- the water flowing through the hot water supply bypass pipe 75 flows as it is toward the hot water supply side heat exchanger 42, but the water flowing into the hot water supply residual heat exchanger 80 is air-conditioned by the hot water supply residual heat exchanger 80.
- the temperature is raised by absorbing heat from the hot water flowing through the cold / hot water circulation circuit 8.
- the heated water and the water flowing through the hot water supply bypass pipe 75 as they are from the water supply port 78 merge at a branch point downstream from the outlet of the hot water remaining heat heat exchanger 80, and then the hot water use side heat exchanger 42. It flows to.
- the temperature of the water that has joined at the branch point rises due to the influence of the water that has been heated by the hot water supply residual heat exchanger 80. That is, the water flowing to the hot water use side heat exchanger 42 is raised by the hot water supply residual heat exchanger 80 more than the temperature of the water flowing through the water supply port 78.
- the water flowing into the hot water use side heat exchanger 42 absorbs heat from the hot water supply refrigerant flowing in the hot water supply refrigerant circuit 6 in the hot water supply use side heat exchanger 42 and changes to hot water.
- the hot water flows out from the hot water supply port 78 and is led to a hot water supply load side device (for example, a bathtub or a washroom).
- This operation mode No. 3 water flowing through the hot water supply passage 9 is warmed in advance by the hot water supply residual heat exchanger 80 before entering the hot water use side heat exchanger 42.
- the amount of exchange heat required for heating the water to the hot water supply temperature can be reduced. That is, the load of the hot water supply operation performed by the hot water supply refrigerant circuit 6 can be reduced.
- the three-way valve 54a on the air conditioning cold / hot water circulation pump 52 side the inlet of the hot water supply heat exchanger 80 are connected by an air conditioning cold / hot water pipe 56a, and the three-way valve 54b on the inlet side of the indoor heat exchanger 61 and the outlet of the hot water supply heat exchanger 80 are connected to the cold / hot water for air conditioning.
- the hot water supply residual heat exchanger 80 is connected in series upstream from the indoor heat exchanger 61 in the water circulation direction.
- the cold / hot water circulation circuit 8 for air conditioning a flow path in which water flows in the order of the hot water supply residual heat exchanger 80 and the indoor heat exchanger 61 is formed.
- the three-way valves 54 a and 54 b are opened and closed, so that the water sent from the air conditioning cold / hot water circulation pump 52 is directly supplied to the indoor heat exchanger 61 without flowing into the hot water supply residual heat exchanger 80. It is also possible to flow.
- the second modification is the same as the first modification in that the hot water after-heat heat exchanger 80 and the indoor heat exchanger 61 are connected in series, but the hot water after-heat heat exchanger 80 and the indoor heat exchanger 61 are the same.
- the connection order is different from that of the first modification. That is, in the air conditioning hot water supply system according to the second modification, the hot water supply residual heat exchanger 80 is connected in series downstream of the indoor heat exchanger 61 in the water circulation direction.
- the modified example 2 is different from the modified example 1 except that the position where the three-way valves 54a and 54b shown in FIG. 18 are attached is the cold / hot water pipe 55b for air conditioning connected to the outlet of the indoor heat exchanger 61. Since it is the same, illustration is abbreviate
- the second modification since hot hot water can be supplied to the indoor heat exchanger 61 before the hot water supply residual heat exchanger 80, the temperature of the indoor heating of the house 60 can be maintained at a high temperature.
- an air conditioning and hot water supply system according to a second embodiment of the present invention will be described with reference to FIG. 19. The description is omitted.
- the air conditioning and hot water supply system according to the second embodiment differs from the air conditioning and hot water supply system according to the first embodiment in the circuit to which the hot water supply residual heat exchanger 80 is connected. This difference will be described in detail below.
- the air conditioning refrigerant circuit 105 is a circuit in which a refrigeration cycle (air conditioning cycle) is formed by circulation of the air conditioning refrigerant.
- the air conditioning compressor 21 compresses the air conditioning refrigerant, and the four ways of switching the flow path of the air conditioning refrigerant.
- a valve (air-conditioning flow path switching valve) 22 an air-conditioning heat source side heat exchanger 24 that exchanges heat with the air sent by a fan (not shown), an air-conditioning refrigerant tank 26, and an air-conditioning that depressurizes the air-conditioning refrigerant.
- the expansion valve 27 is installed in the house 60, and is formed into an annular shape by connecting the air-conditioning use-side heat exchanger 28 that exchanges heat with the indoor air (heat-conveying medium on the air-conditioning use side) through a refrigerant pipe.
- the refrigerant pipe 29a that connects the four-way valve 22 and the air-conditioning use-side heat exchanger 28 is provided with a three-way valve (flow control means, hot water supply assist means) 34a, and the air-conditioning expansion valve 27 and the air-conditioning use-side heat.
- a three-way valve (flow control valve, hot water supply assisting means) 34b is provided in the refrigerant pipe 29b connecting the exchanger 28.
- a hot water supply residual heat exchanger 80 is connected to the air conditioning refrigerant circuit 105 so as to be in parallel with the air conditioning use-side heat exchanger 28.
- a three-way valve 34a provided near the inlet of the air conditioning use-side heat exchanger 28 of the refrigerant pipe 29a and the inlet of the hot water supply heat exchanger 80 are connected by the refrigerant pipe 30a, and the refrigerant pipe 29b
- the air-conditioning use-side heat exchanger 28 and the hot water supply residual heat are connected.
- the heat exchanger 80 and the air conditioning refrigerant circuit 105 have a parallel relationship.
- the air conditioning refrigerant circuit 105 is formed with two channels, a channel through which the air conditioning refrigerant flows through the air conditioning use-side heat exchanger 28 and a channel through which the hot water supply residual heat exchanger 80 flows.
- the hot water supply residual heat exchanger 80 and the three-way valves 34a and 34b correspond to the hot water supply assist means of the present invention.
- the hot water supply residual heat exchanger 80 is connected to the hot water supply passage 9 as in the first embodiment.
- the hot water supply residual heat exchanger 80 can exchange heat between the air conditioning refrigerant and the water flowing through the hot water supply passage 9, and thus obtained in the heating operation. A part of the load of the hot water supply operation can be borne by using the heat. Therefore, when the control device 1a executes the control process as described in the air conditioning and hot water supply system according to the first embodiment, the entire system is similar to the air conditioning and hot water supply system according to the first embodiment. Power consumption can be reduced.
- the same configuration as that of the first and second modifications of the air conditioning and hot water supply system according to the first embodiment is used. It can employ
- the air conditioning hot water supply system includes an intermediate hot water circulation circuit (intermediate heat medium circuit) 7 in which water (intermediate heat medium) stored in a heat storage tank 50 capable of storing heat circulates.
- the first embodiment is that the hot water storage tank 70 is provided in the hot water supply passage 9, the intermediate heat exchanger 23 is provided, and the hot water remaining heat heat exchanger 80 is connected to the intermediate cold / hot water circulation circuit 7. It is different from the air conditioning and hot water supply system according to the embodiment. These differences will be described in detail below.
- the intermediate hot water circulation circuit (intermediate heat medium circuit) 7 connects the lower part of the heat storage tank 50 and one end of the hot water remaining heat heat exchanger 80 with an intermediate hot water pipe 81 a, so that the hot water remaining heat heat exchanger is connected.
- the other end of 80 and one end of the intermediate heat exchanger 23 are connected by an intermediate hot water pipe 81b, and the other end of the intermediate heat exchanger 23 and the heat storage tank 50 are connected by an intermediate hot water pipe 81c to form an annular shape. Circuit.
- An intermediate hot water circulation pump (not shown) is incorporated in the intermediate hot water pipe 81b.
- the water in the intermediate hot water circulation circuit 7 flows to the intermediate heat exchanger 23 by driving the intermediate hot water circulation pump, and the air conditioning refrigerant flowing through the air conditioning refrigerant circuit 5 in the intermediate heat exchanger 23 and While exchanging heat with the hot water supply refrigerant flowing through the hot water supply refrigerant circuit 6, the refrigerant returns to the heat storage tank 50.
- the heat storage tank 50 is filled with the heat storage material, the heat or cold obtained from the intermediate heat exchanger 23 is stored in the heat storage tank 50.
- the heat storage tank 50 is configured to store solar heat by embedding a solar heat collector 4 for collecting solar heat.
- the water (hot water) stored in the heat storage tank 50 is supplied from the hot water supply port 79 to the hot water supply load side (such as a bathtub or a washroom) through the intermediate hot water pipe 76. Further, the water supplied from the water supply port 78 is led to the heat storage tank 50 through the water supply pipe 77.
- the intermediate heat exchanger 23 is connected to each other between three fluids, that is, an air conditioning refrigerant that circulates through the air conditioning refrigerant circuit 5, a hot water supply refrigerant that circulates through the hot water supply refrigerant circuit 6, and water that circulates through the intermediate hot water circulation circuit 7. It has a structure that allows heat exchange.
- the intermediate heat exchanger 23 includes an air conditioning refrigerant heat transfer pipe (not shown) in which an air conditioning refrigerant flows in an outer pipe (not shown) in which water of the intermediate hot water circulation circuit 7 flows, and hot water supply
- the exhaust heat of the air conditioning circuit 5, the exhaust heat of the hot water supply circuit 6, and the heat stored in the intermediate hot water circulation circuit 7 can be used effectively.
- brazing is used to join the refrigerant heat transfer tube for air conditioning and the refrigerant heat transfer tube for hot water supply, but if the heat transfer tubes can be in thermal contact with each other, welding or heat transfer tubes are used. You may employ
- the hot water remaining heat heat exchanger 80 can exchange heat between the water flowing through the cold / hot water circulation circuit 8 for air conditioning and the water flowing through the hot water supply passage 9. A part of the load of the hot water supply operation can be borne by using the heat obtained by the heating operation. Therefore, when the control device 1a executes the control process as described in the air conditioning and hot water supply system according to the first embodiment, the entire system is similar to the air conditioning and hot water supply system according to the first embodiment. Power consumption can be reduced.
- the same configuration as that of the first and second modifications of the air conditioning and hot water system according to the first embodiment is used. It can employ
- the heat storage tank 50 and the hot water storage tank 70 are provided, hot water stored in the heat storage tank 50 and the hot water storage tank 70 can be supplied at an arbitrary time. it can. In the third embodiment, effective use of thermal energy is achieved.
- hot water use side heat exchanger 43 ... hot water supply expansion valve, 44 ... Heat source side heat exchanger for hot water supply, 50 ... Thermal storage tank, 60 ... Housing (air-conditioned space), 61 ... Indoor heat exchanger, 80 ... Hot water remaining heat heat exchanger (hot water supply assist means), TH1 to TH5 ... Temperature sensor, RA , RH ... rotation speed detection sensor, PA, PH, VO1, VO2 Valve opening sensor
Abstract
Description
本発明の第1の実施の形態例に係る空調給湯システムは、図1に示すように、空調用圧縮機21を駆動して冷房運転と暖房運転とを切り替えて運転を行う空調用冷媒回路5と、給湯用圧縮機41を駆動して給湯運転を行う給湯用冷媒回路6と、空調用冷媒回路5と熱交換を行って、住宅(被空調空間)60の室内の空調を行う空調用冷温水循環回路(空調用熱搬送媒体循環回路)8と、給湯用冷媒回路6と熱交換を行って給湯を行う給湯流路9と、運転の制御を行う制御装置1aとを備えている。また、本発明の第1の実施の形態例に係る空調給湯システムは、室外に配置されるヒートポンプユニット1と、室内に配置される室内ユニット2とを備えたユニット構成となっている。
運転モードNo.1は、空調用冷媒回路5による冷房運転と、給湯用冷媒回路6による給湯運転とをそれぞれ行う運転モードである。
運転モードNo.2は、空調用冷媒回路5による暖房運転と、給湯用冷媒回路6による給湯運転とをそれぞれ行うモードである。
運転モードNo.3は、空調用冷媒回路5による暖房運転が、給湯用冷媒回路6による給湯運転の一部の負荷を負担しながら給湯アシスト運転を行うモードである。
次に、第1の実施の形態例に係る空調給湯システムの変形例について説明する。上記した第1の実施の形態例に係る空調給湯システムでは、給湯余熱熱交換器80と室内熱交換器61とを並列に接続したが、この変形例では、給湯余熱熱交換器80と室内熱交換器61とを直列に接続している。以下、図18を用いて具体的に説明する。
次に、第1の実施の形態例に係る空調給湯システムの変形例2について説明する。この変形例2では、給湯余熱熱交換器80と室内熱交換器61とを直列に接続している点では、変形例1と同じであるが、給湯余熱熱交換器80と室内熱交換器61の接続順序が変形例1と逆になっている点で相違する。即ち、この変形例2に係る空調給湯システムでは、室内熱交換器61より水の循環方向の下流側に給湯余熱熱交換器80が直列に接続された構成となっている。この構成により、空調用冷温水循環回路8には、水が室内熱交換器61、給湯余熱熱交換器80の順に流れる流路が形成される。なお、この変形例2は、図18に示す三方弁54a、54bの取り付けられる位置が、室内熱交換器61の出口に接続された空調用冷温水配管55bである点以外は、変形例1と同じであるため、図示は省略している。この変形例2では、高温の温水を給湯余熱熱交換器80よりも先に室内熱交換器61に供給することができるため、住宅60の室内暖房の温度を高温に維持することができる。
次に、本発明の第2の実施の形態例に係る空調給湯システムについて図19を用いて説明するが、第1の実施の形態例に係る空調給湯システムと同一の構成については、同一の符号を付して、その説明を省略する。第2の実施の形態例に係る空調給湯システムは、第1の実施の形態例に係る空調給湯システムに比べて、給湯余熱熱交換器80が接続される回路に相違がある。この相違について、以下、詳しく説明していくことにする。
次に、本発明の第3の実施の形態例に係る空調給湯システムについて図20を用いて説明するが、第1の実施の形態例に係る空調給湯システムと同一の構成については、同一の符号を付して、その説明を省略する。
Claims (8)
- 空調用圧縮機を駆動して冷房運転と暖房運転を行う空調用冷媒回路と、給湯用圧縮機を駆動して給湯運転を行う給湯用冷媒回路と、運転の制御を行う制御装置とを備えた空調給湯システムにおいて、
前記暖房運転で発生した温熱を前記給湯運転に利用するための給湯アシスト手段を備え、
前記制御装置は、
現在の空調負荷の値を推定する空調負荷推定手段と、
現在の空調消費電力の値を推定する空調消費電力推定手段と、
現在の給湯負荷の値を推定する給湯負荷推定手段と、
現在の給湯消費電力の値を推定する給湯消費電力推定手段と、
前記推定された空調負荷の値を仮決定する空調負荷仮決定手段と、
前記仮決定された空調負荷の値に予め定めた値を加えて新たな空調負荷の値を算出する空調負荷算出手段と、
前記新たな空調負荷に基づいて新たな空調消費電力を算出する空調消費電力算出手段と、
前記推定された空調負荷の値、前記推定された給湯負荷の値および前記新たな空調負荷の値に基づいて新たな給湯負荷の値を算出する給湯負荷算出手段と、
前記新たな給湯負荷の値に基づいて新たな給湯消費電力を算出する給湯消費電力算出手段と、
前記推定された空調消費電力の値と前記推定された給湯消費電力の値とを合計した推定消費電力合計値と、前記新たな空調消費電力の値と前記新たな給湯消費電力の値とを合計した新たな消費電力合計値とを比較する消費電力比較手段と、
前記新たな消費電力合計値が前記推定消費電力合計値よりも小さいと判断された場合に、前記新たな空調負荷の値に近づくように前記給湯アシスト手段の動作を制御するアシスト制御手段と
を備えたことを特徴とする空調給湯システム。 - 請求項1の記載において、
前記新たな空調負荷の値が、予め定めた第1の閾値より大きいか否かを判断する第1の閾値判断手段を備え、
前記予め定めた第1の閾値として、前記空調用圧縮機の暖房定格出力または最大出力となる空調負荷の値が設定され、
前記新たな空調負荷の値が前記予め定めた第1の閾値よりも大きいと前記第1の閾値判断手段が判断した場合に、前記アシスト制御手段は前記給湯アシスト手段の動作を制御する
ことを特徴とする空調給湯システム。 - 請求項1または2の記載において、
前記新たな空調負荷の値が、予め定めた第2の閾値より大きいか否かを判断する第2の閾値判断手段を備え、
前記予め定めた第2の閾値として、前記空調用圧縮機の連続運転と断続運転との境界となる空調負荷の値に設定され、
前記新たな空調負荷の値が前記予め定めた第2の閾値よりも小さいと前記第2の閾値判断手段が判断した場合に、前記空調負荷算出手段は、算出した前記新たな空調負荷に前記予め定めた値を加えて新たな空調負荷を再度算出する
ことを特徴とする空調給湯システム。 - 請求項1~3のいずれか1項の記載において、
前記新たな消費電力合計値が前記推定消費電力合計値よりも小さいと判断された場合に前記新たな空調負荷の値に基づいて前記空調用圧縮機の目標回転数を決定する空調用目標回転数決定手段と、
前記新たな消費電力合計値が前記推定消費電力合計値よりも小さいと判断された場合に前記新たな給湯負荷の値に基づいて前記給湯用圧縮機の目標回転数を決定する給湯用目標回転数決定手段と
を備えたことを特徴とする空調給湯システム。 - 請求項1~4のいずれか1項の記載において、
前記空調負荷仮決定手段は、前記アシスト制御手段による前記給湯アシスト手段の動作の制御中である場合に、前記推定された空調負荷の値を補正する補正手段を備えた
ことを特徴とする空調給湯システム。 - 請求項1~5のいずれか1項の記載において、
前記空調用冷媒回路と熱交換可能に接続され、空調用利用側の熱搬送媒体が循環する空調用熱搬送媒体循環回路と、
前記給湯用冷媒回路と熱交換可能に接続され、給湯用利用側の熱搬送媒体が流れる給湯流路と
を有し、
前記空調用冷媒回路は、前記空調用圧縮機、空調用流路切替弁、空調用熱源側の熱搬送媒体と熱交換を行うための空調用熱源側熱交換器、空調用膨張弁、前記空調用利用側の熱搬送媒体と熱交換を行うための空調用利用側熱交換器を順次冷媒配管で接続して環状に形成され、
前記給湯用冷媒回路は、前記給湯用圧縮機、前記給湯用利用側の熱搬送媒体と熱交換を行う給湯用利用側熱交換器、給湯用膨張弁、給湯用熱源側の熱搬送媒体と熱交換を行うための給湯用熱源側熱交換器を順次冷媒配管で接続して環状に形成され、
前記空調用熱搬送媒体循環回路は、前記空調用利用側熱交換器と被空調空間に設置された室内熱交換器との間を配管で接続して環状に形成され、
前記給湯アシスト手段は、
前記空調用利用側の熱搬送媒体と前記給湯用利用側の熱搬送媒体との間で熱交換を行う給湯余熱熱交換器と、
前記空調用利用側の熱搬送媒体が前記給湯余熱熱交換器へ流れる流量を制御する流量制御手段と
を備え、
前記給湯余熱熱交換器は、前記給湯用利用側熱交換器よりも上流側の前記給湯流路に接続されると共に、前記室内熱交換器と直列または並列になるように前記空調用熱搬送媒体循環回路に接続され、
前記アシスト制御手段は、前記新たな空調負荷の値に近づくように、前記流量制御手段の動作を制御する
ことを特徴とする空調給湯システム。 - 請求項1~5のいずれか1項の記載において、
前記給湯用冷媒回路と熱交換可能に接続され、給湯用利用側の熱搬送媒体が流れる給湯流路を有し、
前記空調用冷媒回路は、前記空調用圧縮機、空調用流路切替弁、空調用熱源側の熱搬送媒体と熱交換を行うための空調用熱源側熱交換器、空調用膨張弁、空調用利用側の熱搬送媒体と熱交換を行うための空調用利用側熱交換器を順次冷媒配管で接続して環状に形成され、
前記給湯用冷媒回路は、前記給湯用圧縮機、前記給湯用利用側の熱搬送媒体と熱交換を行う給湯用利用側熱交換器、給湯用膨張弁、給湯用熱源側の熱搬送媒体と熱交換を行うための給湯用熱源側熱交換器を順次冷媒配管で接続して環状に形成され、
前記給湯アシスト手段は、
前記空調用冷媒回路を流れる空調用冷媒と前記給湯用利用側の熱搬送媒体との間で熱交換を行う給湯余熱熱交換器と、
前記空調用冷媒が前記給湯余熱熱交換器へ流れる流量を制御する流量制御手段と
を備え、
前記給湯余熱熱交換器は、前記給湯用利用側熱交換器よりも上流側の前記給湯流路に接続されると共に、前記空調用利用側熱交換器と直列または並列になるように前記空調用冷媒回路に接続され、
前記アシスト制御手段は、前記新たな空調負荷の値に近づくように、前記流量制御手段の動作を制御する
ことを特徴とする空調給湯システム。 - 請求項1~5のいずれか1項の記載において、
前記空調用冷媒回路と熱交換可能に接続され、空調用利用側の熱搬送媒体が循環する空調用熱搬送媒体循環回路と、
前記給湯用冷媒回路と熱交換可能に接続され、給湯用利用側の熱搬送媒体が流れる給湯流路と、
蓄熱が可能な蓄熱タンクに貯留された中間熱媒体が循環する中間熱媒体回路と、
前記空調用冷媒回路、前記給湯用冷媒回路、および前記中間熱媒体回路の3つの回路間で熱交換が可能な中間熱交換器と
を有し、
前記空調用冷媒回路は、前記空調用圧縮機、空調用流路切替弁、空調用熱源側の熱搬送媒体と熱交換を行うための空調用熱源側熱交換器、空調用膨張弁、前記空調用利用側の熱搬送媒体と熱交換を行うための空調用利用側熱交換器を順次冷媒配管で接続して環状に形成され、
前記給湯用冷媒回路は、前記給湯用圧縮機、前記給湯用利用側の熱搬送媒体と熱交換を行う給湯用利用側熱交換器、給湯用膨張弁、給湯用熱源側の熱搬送媒体と熱交換を行うための給湯用熱源側熱交換器を順次冷媒配管で接続して環状に形成され、
前記空調用熱搬送媒体循環回路は、前記空調用利用側熱交換器と被空調空間に設置された室内熱交換器との間を配管で接続して環状に形成され、
前記給湯アシスト手段は、
前記空調用利用側の熱搬送媒体と前記中間熱媒体との間で熱交換を行う給湯余熱熱交換器と、
前記空調用利用側の熱搬送媒体が前記給湯余熱熱交換器へ流れる流量を制御する流量制御手段と
を備え、
前記給湯余熱熱交換器は、前記中間熱交換器よりも上流側の前記中間熱媒体回路に接続されると共に、前記室内熱交換器と直列または並列になるように前記空調用熱搬送媒体循環回路に接続され、
前記アシスト制御手段は、前記新たな空調負荷の値に近づくように、前記流量制御手段の動作を制御する
ことを特徴とする空調給湯システム。
Priority Applications (4)
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CN201080063633.7A CN102753917B (zh) | 2010-03-02 | 2010-03-02 | 空气调节热水供给系统 |
EP10846978.4A EP2543940A4 (en) | 2010-03-02 | 2010-03-02 | HOT WATER SUPPLY SYSTEM FOR AN AIR-CONDITIONING SYSTEM |
PCT/JP2010/053312 WO2011108073A1 (ja) | 2010-03-02 | 2010-03-02 | 空調給湯システム |
JP2012502914A JP5553888B2 (ja) | 2010-03-02 | 2010-03-02 | 空調給湯システム |
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JP (1) | JP5553888B2 (ja) |
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CN108344088A (zh) * | 2018-03-15 | 2018-07-31 | 田云 | 一种热泵调水调气保鲜分体或整体式机组 |
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Citations (4)
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JP2004116947A (ja) * | 2002-09-27 | 2004-04-15 | Osaka Gas Co Ltd | 空調運転管理システム |
JP2004218921A (ja) * | 2003-01-14 | 2004-08-05 | Matsushita Electric Ind Co Ltd | ヒートポンプ式給湯機 |
JP2004257627A (ja) * | 2003-02-25 | 2004-09-16 | Sanyo Electric Co Ltd | ヒートポンプ装置 |
JP2008218921A (ja) * | 2007-03-07 | 2008-09-18 | Nec Electronics Corp | 位置ずれ量の測定用パターンおよび測定方法、ならびに半導体装置 |
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JP2554208B2 (ja) * | 1991-02-18 | 1996-11-13 | 関西電力株式会社 | ヒートポンプ式給湯装置 |
JPH04366373A (ja) * | 1991-06-12 | 1992-12-18 | Mitsubishi Electric Corp | 空気調和装置 |
JP4182662B2 (ja) * | 2001-12-19 | 2008-11-19 | ダイキン工業株式会社 | 空気調和機 |
KR20040050477A (ko) * | 2002-12-10 | 2004-06-16 | 엘지전자 주식회사 | 공기조화시스템 |
KR20060086761A (ko) * | 2005-01-27 | 2006-08-01 | 엘지전자 주식회사 | 냉난방겸용 공조장치 |
JP2008116100A (ja) * | 2006-11-02 | 2008-05-22 | Matsushita Electric Ind Co Ltd | 物品貯蔵装置 |
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Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2004116947A (ja) * | 2002-09-27 | 2004-04-15 | Osaka Gas Co Ltd | 空調運転管理システム |
JP2004218921A (ja) * | 2003-01-14 | 2004-08-05 | Matsushita Electric Ind Co Ltd | ヒートポンプ式給湯機 |
JP2004257627A (ja) * | 2003-02-25 | 2004-09-16 | Sanyo Electric Co Ltd | ヒートポンプ装置 |
JP2008218921A (ja) * | 2007-03-07 | 2008-09-18 | Nec Electronics Corp | 位置ずれ量の測定用パターンおよび測定方法、ならびに半導体装置 |
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CN102753917A (zh) | 2012-10-24 |
CN102753917B (zh) | 2014-11-05 |
JP5553888B2 (ja) | 2014-07-16 |
EP2543940A1 (en) | 2013-01-09 |
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