WO2011108392A1 - 温水ヒートポンプおよびその制御方法 - Google Patents
温水ヒートポンプおよびその制御方法 Download PDFInfo
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- WO2011108392A1 WO2011108392A1 PCT/JP2011/053768 JP2011053768W WO2011108392A1 WO 2011108392 A1 WO2011108392 A1 WO 2011108392A1 JP 2011053768 W JP2011053768 W JP 2011053768W WO 2011108392 A1 WO2011108392 A1 WO 2011108392A1
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- WIPO (PCT)
- Prior art keywords
- hot water
- water system
- heat
- temperature
- way valve
- Prior art date
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 390
- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 38
- 238000009434 installation Methods 0.000 abstract description 9
- 238000010586 diagram Methods 0.000 description 15
- 238000005338 heat storage Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 239000003507 refrigerant Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H4/00—Fluid heaters characterised by the use of heat pumps
- F24H4/02—Water heaters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
-
- 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
- F24D19/1009—Arrangement or mounting of control or safety devices for water heating systems for central heating
- F24D19/1015—Arrangement or mounting of control or safety devices for water heating systems for central heating using a valve or valves
- F24D19/1024—Arrangement or mounting of control or safety devices for water heating systems for central heating using a valve or valves a multiple way valve
-
- 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
- F24D19/1009—Arrangement or mounting of control or safety devices for water heating systems for central heating
- F24D19/1039—Arrangement or mounting of control or safety devices for water heating systems for central heating the system uses a 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
- F24D3/00—Hot-water central heating systems
- F24D3/18—Hot-water central heating systems using heat pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H15/00—Control of fluid heaters
- F24H15/20—Control of fluid heaters characterised by control inputs
- F24H15/212—Temperature of the water
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H4/00—Fluid heaters characterised by the use of heat pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/20—Arrangement or mounting of control or safety devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/20—Arrangement or mounting of control or safety devices
- F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B30/00—Heat pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D2200/00—Heat sources or energy sources
- F24D2200/12—Heat pump
- F24D2200/126—Absorption type 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
- F24D2220/00—Components of central heating installations excluding heat sources
- F24D2220/02—Fluid distribution means
- F24D2220/0235—Three-way-valves
-
- 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]
- Y02B30/12—Hot water central heating systems using heat pumps
Definitions
- the present invention relates to a hot water heat pump and a control method thereof, and more particularly to temperature control of a hot water system derived from the hot water heat pump.
- a hot water system that supplies hot water has a heat storage tank.
- a part of the water stored in the heat storage tank is controlled in temperature by obtaining heat from a heat output heat exchanger provided in the main body of the hot water heat pump (for example, a patent) Reference 1).
- the opening degree of the control valve provided in the heat source system and the refrigerant system led to the hot water heat pump is controlled according to the temperature of the hot water system (for example, Patent Document 2 to Patent Document 4).
- Patent Document 1 has a problem that installation cost and installation space are required because a heat storage tank is provided in the hot water system.
- the invention described in Patent Document 1 is configured to raise the temperature of the water in the heat storage tank by circulating the water stored in the heat storage tank to the hot water heat pump main body, so that it takes time to raise the temperature. There was a problem.
- the present invention has been made in view of such circumstances, and it is possible to reduce the installation cost and the installation space, and it is possible to reduce the heating time of the hot water system and the control method thereof The purpose is to provide.
- the hot water heat pump includes a hot water heat pump main body having a heat output heat exchanger that draws heat from a heat source system and outputs heat, a hot water system that obtains heat from the heat output heat exchanger, A three-way valve provided in a hot water system, and a control unit that controls the hot water heat pump main body and the three-way valve, wherein the control unit converts a part of the hot water system derived from the thermal output heat exchanger into the hot water
- the opening degree of the three-way valve is controlled so as to lead to the upstream side of the output heat exchanger.
- a hot water system for supplying hot water has a heat storage tank.
- a part of the water stored in the heat storage tank obtains heat from a heat output heat exchanger provided in the hot water heat pump main body, thereby controlling the temperature.
- the hot water system is directly obtained from the thermal output heat exchanger without providing additional equipment. Therefore, warm temperature is directly added to a warm water system, and the temperature increase rate of the warm water system derived from the warm output heat exchanger is increased. Therefore, it is possible to shorten the temperature raising time of the hot water system while reducing the installation cost of the hot water heat pump and downsizing the hot water heat pump.
- a control unit for controlling the three-way valve is provided to circulate a part of the hot water system heated by obtaining the heat from the heat output heat exchanger to the hot water system led to the heat output heat exchanger. . Therefore, the temperature of the hot water system led to the thermal output heat exchanger can be controlled by controlling the opening degree of the three-way valve. Therefore, even when the temperature rise rate of the hot water system is increased by directly obtaining the heat from the heat output heat exchanger, the temperature fluctuation of the hot water system derived from the heat output heat exchanger can be controlled. .
- the hot water heat pump includes an inlet-side hot water system temperature detector provided in a hot water system led to the thermal output heat exchanger, and between the thermal output heat exchanger and the three-way valve.
- An outlet-side hot water system temperature detector provided in the hot water system, and the control unit detects the inlet-side hot water system temperature detected by the inlet-side hot water system temperature detector as the inlet-side hot water system target temperature. It is good also as controlling the opening degree of the said three-way valve.
- the control part which controls the opening degree of a three-way valve according to the inlet side hot water system temperature was provided. Therefore, if the inlet-side hot water system temperature of the hot water system led to the thermal output heat exchanger is lower than the inlet-side hot water system target temperature, the flow rate of the hot water system circulating from the three-way valve to the thermal output heat exchanger is reduced. If the inlet side hot water system temperature of the water supply system that is increased and led to the thermal output heat exchanger rises above the inlet side hot water system target temperature, the flow rate of the hot water system that circulates from the three-way valve to the thermal output heat exchanger Can be reduced. Therefore, temperature fluctuation of the hot water system led to the warm heat output heat exchanger can be suppressed.
- control unit is configured so that the outlet side hot water system temperature detected by the outlet side hot water system temperature detector becomes the outlet side hot water system target temperature. It is good also as controlling the thermal output of a heat pump main body.
- control unit may feedback control the opening degree of the three-way valve and the thermal output.
- a control unit that feedback controls the opening of the three-way valve and the thermal output is provided. Therefore, even when the inlet side hot water system temperature of the water supply system led to the thermal output heat exchanger fluctuates, the inlet side hot water system temperature can be maintained at the inlet side hot water system target temperature.
- a control unit for feedback control of the thermal output is provided. Therefore, the outlet side hot water system temperature of the feed water system derived from the thermal output heat exchanger can be maintained at the outlet side hot water system target temperature. Therefore, even if the temperature change of the outlet-side hot water system temperature cannot be suppressed only by controlling the three-way valve, the temperature fluctuation of the hot water system derived from the thermal output heat exchanger can be suppressed.
- the hot water heat pump according to the first aspect of the present invention is directed to the upstream inlet side hot water system temperature detector provided in the upstream hot water system where the hot water system led from the three-way valve joins, and the thermal output heat exchanger.
- the feedforward control may be performed using the temperature and the inlet-side flow rate detected by the inlet-side flow rate detector.
- Three-way valve according to the upstream inlet hot water system temperature of the upstream hot water system where the hot water system heated by the three-way valve joins and the flow rate of the hot water system at the inlet side of the thermal output heat exchanger where the heated hot water system joined A control unit for feed-forward control of the opening degree is provided. Therefore, even when the temperature and flow rate of the hot water system change abruptly, the water obtained by controlling the three-way valve to obtain heat can be supplied to the heat output heat exchanger. Therefore, the temperature fluctuation of the hot water system derived from the hot output heat exchanger can be suppressed.
- control unit sets the opening of the three-way valve to the outlet side hot water system temperature using the outlet side hot water system temperature as the outlet side hot water system target temperature. It is also possible to control by adding a temperature compensation term that compensates so as to approach.
- the opening degree of the three-way valve is controlled by adding a temperature compensation term that compensates for the temperature difference between the outlet side hot water system temperature and the outlet side hot water system target temperature from the outlet side hot water system temperature. Therefore, even when the temperature of the hot water system changes abruptly, the water obtained by controlling the three-way valve to obtain heat can be supplied to the heat output heat exchanger. Therefore, the temperature fluctuation of the hot water system derived from the hot output heat exchanger can be suppressed.
- the control method of the hot water heat pump according to the second aspect of the present invention obtains heat from a hot water heat pump main body having a heat output heat exchanger that draws heat from a heat source system and outputs temperature, and the heat output heat exchanger.
- a hot water heat pump main body of a hot water heat pump comprising a hot water system and a three-way valve provided in the hot water system, and a control method of the hot water heat pump for controlling the three-way valve, which is derived from the thermal output heat exchanger The opening degree of the three-way valve is controlled so that a part of the hot water system is led to the upstream side of the hot water output heat exchanger.
- a control unit for controlling the three-way valve is provided to circulate a part of the hot water system heated by obtaining the heat from the heat output heat exchanger to the hot water system led to the heat output heat exchanger. . Therefore, the temperature of the hot water system led to the thermal output heat exchanger can be controlled by controlling the opening degree of the three-way valve. Therefore, even when the temperature rise rate of the hot water system is increased by directly obtaining the heat from the heat output heat exchanger, the temperature fluctuation of the hot water system derived from the heat output heat exchanger can be controlled. .
- FIG. 1 is a schematic configuration diagram of a hot water heat pump according to a first embodiment of the present invention. It is a block diagram of the control method of the hot water heat pump concerning a 1st embodiment of the present invention. It is a modification of the schematic block diagram of the hot water heat pump which concerns on 1st Embodiment of this invention. It is a schematic block diagram of the hot water heat pump which concerns on 2nd Embodiment of this invention. It is a block diagram of the control method of the hot water heat pump which concerns on 2nd Embodiment of this invention. It is a schematic block diagram of the hot water heat pump which concerns on 3rd Embodiment of this invention. It is a block diagram of the control method of the hot water heat pump which concerns on 3rd Embodiment of this invention. It is a modification of the block diagram of the control method of the hot water heat pump which concerns on 3rd Embodiment of this invention.
- FIG. 1 shows a schematic configuration diagram of a hot water heat pump according to the first embodiment of the present invention.
- the hot water heat pump 1 includes a hot water heat pump main body 2, a water supply pump 3, and a three-way valve 4.
- the hot water heat pump main body 2 has a thermal output heat exchanger (not shown).
- the hot water heat pump main body 2 is typically a refrigerator capable of operating the heat pump 1, for example, an absorption refrigerator.
- the thermal output heat exchanger draws heat from a heat source system led to the thermal output heat exchanger and outputs thermal heat.
- the thermal output pumped by the thermal output heat exchanger is controlled by a control unit (not shown).
- the heat pumped out by the heat output heat exchanger is added to the hot water system via the heat output heat exchanger.
- the warm heat added to the warm water system is supplied to an external load (not shown) such as a fan coil.
- the water in the heated hot water system (hereinafter referred to as “inlet-side hot water system”) 5 is supplied to the thermal output heat exchanger.
- an inlet side hot water system temperature detector 20 for detecting the temperature of the inlet side hot water system 5 (inlet side hot water system temperature) is provided.
- the temperatures of the upstream inlet-side hot water system 8 and the initial inlet-side hot water system 5 are set to 30 ° C., for example.
- the inlet-side hot water system 5 led to the thermal output heat exchanger obtains heat by the thermal output heat exchanger and is derived from the thermal output heat exchanger.
- an outlet side hot water system temperature detector 21 is provided between the hot water system (hereinafter referred to as “exit side hot water system”) 6 derived from the thermal output heat exchanger and a three-way valve 4 described later.
- the outlet side hot water system 6 is provided with a three-way valve 4 that is a flow rate adjusting valve.
- the partial flow rate (hereinafter referred to as “circulation hot water system”) 7 of the outlet-side hot water system 6 that has been heated is joined to the inlet-side hot water system 5 by controlling the three-way valve 4 by the control unit.
- the outlet-side hot water system 6 that has not been led to the circulating hot water system 7 via the three-way valve 4 is led out of the hot water heat pump 1.
- the circulating hot water system 7 joined to the upstream inlet side hot water system 8 via the three-way valve 4 is supplied with water at a temperature of 75 ° C. by joining with the low temperature, for example, 30 ° C. upstream inlet side hot water system 8. It is led to the heat output heat exchanger via the pump 3.
- the inlet-side hot water system 5 led to the thermal output heat exchanger is added with hot heat drawn from the heat source system.
- FIG. 1 The block diagram of the control method of the hot water heat pump which concerns on 1st Embodiment is shown by FIG.
- the temperature of the inlet side hot water system 5 detected by the inlet side hot water system temperature detector 20 does not reach the inlet side hot water system target temperature
- the temperature of the inlet side hot water system 5 becomes the inlet side hot water system target temperature.
- the three-way valve 4 is feedback-controlled so as to reach it.
- the circulating hot water system 7 is circulated from the three-way valve 4 to the thermal output heat exchanger.
- the circulation is circulated from the three-way valve 4 to the thermal output heat exchanger. The flow rate of the hot water system 7 can be reduced.
- the temperature of the outlet-side hot water system 6 detected by the outlet-side hot water system temperature detector 21 has not reached the outlet-side hot water system target temperature
- the temperature of the outlet-side hot water system 6 is the outlet-side hot water system target.
- the thermal output of the hot water heat pump main body 2 is feedback controlled so as to match the temperature.
- the inlet side water supply system 5 can control the heat obtained from the heat output heat exchanger.
- the three-way valve 4 is feedback controlled according to the temperature of the inlet-side hot water system temperature detector 20 detected by the inlet-side hot water system temperature detector 20, and the temperature of the outlet hot water system 6 is detected by the outlet-side hot water system temperature detector 21.
- the inlet-side hot water system (warm water system) 5 obtains the heat directly from the heat output heat exchanger without providing any other equipment. For this reason, since warm heat is directly added to the inlet-side hot water system 5, the temperature increase rate of the outlet-side hot water system (hot water system derived from the thermal output heat exchanger) 6 is increased. Therefore, it is possible to shorten the temperature raising time of the outlet side hot water system 6 while reducing the installation cost of the hot water heat pump 1 and reducing the size of the hot water heat pump 1.
- the hot water heat pump 1 is configured so that a circulating heat system 7 which is a partial flow rate of the outlet side hot water system 6 heated by obtaining heat from the heat output heat exchanger is connected to the upstream inlet side hot water system 8.
- the control part (not shown) which controls a three-way valve is provided so that it may circulate to the inlet side hot water system
- the hot water heat pump 1 of the first embodiment includes a control unit that controls the opening degree of the three-way valve 4 according to the temperature of the inlet side hot water system 5. Therefore, when the temperature of the inlet side hot water system 5 is lower than the target temperature of the inlet side hot water system, the flow rate of the circulating hot water system (the hot water system circulating from the three-way valve 4 to the thermal output heat exchanger) 7 is increased. When the temperature of the inlet side hot water system 5 rises higher than the inlet side hot water system target temperature, the flow rate of the circulating hot water system 7 can be reduced. Therefore, the temperature fluctuation of the inlet side water supply system 5 led to the heat output heat exchanger can be suppressed.
- the hot water heat pump 1 of the first embodiment includes a control unit that controls the thermal output of the hot water heat pump main body 2 according to the temperature of the outlet side hot water system 6.
- a control unit that controls the thermal output of the hot water heat pump main body 2 according to the temperature of the outlet side hot water system 6.
- the hot water heat pump 1 of the first embodiment includes a control unit that performs feedback control of the opening degree and the thermal output of the three-way valve 4. Therefore, even when the temperature of the inlet-side hot water system 5 varies, the temperature of the inlet-side hot water system 5 can be maintained at the inlet-side hot water system target temperature.
- a control unit for feedback control of the thermal output is provided. Therefore, the temperature of the outlet side hot water system 6 can be maintained at the outlet side hot water system target temperature. Therefore, even if it is a case where the temperature change of the exit side hot water system
- the outlet-side hot water system temperature detector 21 is described as being provided in the outlet-side hot water system 6 between the three-way valve 4 and the thermal output heat exchanger.
- the present invention is not limited to this. Instead, as shown in FIG. 3, the outlet side hot water system temperature detector 21 may be provided in the outlet side hot water system downstream of the three-way valve 4.
- the hot water heat pump and the control method of the second embodiment are the first in that the upstream inlet hot water system includes a temperature detector and a flow rate detector at the inlet of the thermal output heat exchanger, and feedforward control is added to the three-way valve.
- the rest is the same as the first embodiment. Therefore, the same configuration and control method as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted.
- the schematic block diagram of the hot water heat pump which concerns on 2nd Embodiment is shown by FIG.
- the upstream inlet hot water system 8 is provided with an upstream inlet side hot water system temperature detector 22.
- the upstream inlet side hot water system temperature detector 22 detects the temperature of the upstream inlet hot water system 8 before joining the circulating hot water system 7.
- an inlet-side flow rate detector 23 is provided at the inlet of the thermal output heat exchanger.
- the inlet side flow rate detector 23 detects the flow rate of the inlet side hot water system 5 introduced into the thermal output heat exchanger.
- FIG. 1 The block diagram of the control method of the hot water heat pump which concerns on 2nd Embodiment is shown by FIG.
- the control unit performs feedback control of the three-way valve 4 so that the temperature of the inlet-side hot water system 5 reaches the inlet-side hot water system target temperature.
- a control unit is determined based on a table for the temperature of the upstream inlet side hot water system 8 detected by the upstream inlet side hot water system temperature detector 22 and the flow rate of the inlet side hot water system 5 detected by the inlet side flow rate detector 23. Finds the opening of the three-way valve 4.
- the opening degree of the three-way valve 4 obtained from the table is feedforward controlled by the control unit.
- the control unit is configured so that the temperature of the outlet-side hot water system 6 matches the outlet-side hot water system target temperature.
- the thermal output of the main body 2 is feedback controlled.
- the hot water heat pump 1 of the second embodiment includes an upstream inlet side hot water system (an upstream side hot water system where the hot water system heated by the three-way valve 4 joins) 8 and an inlet side hot water system at the inlet of the thermal output heat exchanger.
- the control part which feedforward-controls the opening degree of the three-way valve 4 according to the flow volume of 5 is provided. Therefore, even if the temperature and flow rate of the upstream inlet-side hot water system (hot water system) 8 change suddenly, the temperature of the inlet-side hot water system 5 guided to the thermal output heat exchanger by controlling the three-way valve 4 Can be controlled. Therefore, the temperature fluctuation of the outlet side hot water system 6 can be suppressed.
- the hot water heat pump and the control method of the third embodiment include a temperature detector in the upstream inlet hot water system, a flow rate detector at the inlet of the thermal output heat exchanger, and a temperature detector in the heat source system introduced into the hot water heat pump body. And is different from the first embodiment in that the control of the temperature compensation term is added to the three-way valve, and the others are the same as in the first embodiment. Therefore, the same configuration and control method as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted.
- FIG. 6 shows a schematic configuration diagram of a hot water heat pump according to the third embodiment.
- the upstream inlet side hot water system 8 is provided with a temperature detector 22 for the upstream inlet side hot water system.
- the upstream inlet side hot water system temperature detector 22 detects the temperature of the upstream inlet side hot water system 8.
- An inlet-side flow rate detector 23 is provided at the inlet of the thermal output heat exchanger.
- the inlet side flow rate detector 23 detects the flow rate of the inlet hot water system 5 introduced into the thermal output heat exchanger.
- an inlet side heat source system temperature detector 24 is provided in the heat source system 9 (hereinafter referred to as “inlet side heat source system”) led to the thermal output heat exchanger.
- the inlet side heat source system temperature detector 24 detects the temperature of the inlet side heat source system 9.
- FIG. 1 The block diagram of the control method of the hot water heat pump which concerns on 3rd Embodiment is shown by FIG.
- the control unit performs feedback control of the three-way valve 4 so that the temperature of the inlet-side hot water system 5 reaches the inlet-side hot water system target temperature. To do. Further, the control unit obtains a deviation between the temperature of the inlet side hot water system 5 and the temperature of the outlet side hot water system 6. When the deviation is larger than the predetermined difference, the control unit inserts a first-order lag term.
- control unit controls the three-way valve 4 by adding a temperature compensation term from the temperature of the outlet side hot water system 6 detected by the outlet side hot water system detector 21.
- the temperature compensation term is to compensate so as to reduce the temperature difference between the temperature of the outlet-side hot water system 6 and the outlet-side hot water system target temperature.
- control unit is a table for the temperature of the upstream inlet side hot water system 8 detected by the upstream inlet side hot water system temperature detector 22 and the flow rate of the inlet side hot water system 5 detected by the inlet side flow rate detector 23.
- the opening degree of the three-way valve 4 is obtained, and the opening degree of the three-way valve 4 is feedforward controlled.
- the control unit main body of the hot water heat pump so that the temperature of the outlet-side hot water system 6 matches the outlet-side hot water system target temperature.
- the thermal output of 2 is feedback controlled.
- the hot water heat pump 1 of the third embodiment compensates for the temperature difference (deviation) between the temperature of the outlet side hot water system 6 and the target temperature of the outlet side hot water system so as to decrease from the temperature of the outlet side hot water system 6.
- a control unit for controlling the opening degree of the three-way valve 4. Therefore, even when the temperature of the outlet side hot water system 6 changes rapidly, the temperature of the inlet side hot water system 5 guided to the thermal output heat exchanger by controlling the three-way valve 4 can be controlled. Therefore, the temperature fluctuation of the outlet side hot water system 6 derived from the thermal output heat exchanger can be suppressed.
- the three-way valve 4 is controlled by adding a temperature compensation term from the temperature of the outlet-side hot water system 6 detected by the outlet-side hot water system temperature detector 21, but the present invention is not limited to this. It is not limited to.
- a compensation term may be added to the control of the three-way valve 4.
- FIG. 8 shows a block diagram of a control method of the hot water heat pump in this case as a reference example.
- the control unit When the temperature of the inlet-side hot water system 5 has not reached the inlet-side hot water system target temperature, the control unit performs feedback control of the three-way valve 4 so that the temperature of the inlet-side hot water system 5 reaches the inlet-side hot water system target temperature. To do. Furthermore, the control unit inserts a first-order lag term when the temperature of the inlet-side heat source system 9 is higher or lower than a predetermined temperature. Thereafter, the control unit adds a temperature compensation term to control the three-way valve 4. The temperature compensation term compensates so as to reduce the temperature difference between the temperature of the outlet-side hot water system 6 and the outlet-side hot water system target temperature, and is obtained from the temperature of the inlet-side heat source system 9.
- control unit is a table for the temperature of the upstream inlet side hot water system 8 detected by the upstream inlet side hot water system temperature detector 22 and the flow rate of the inlet side hot water system 5 detected by the inlet side flow rate detector 23.
- the opening degree of the three-way valve 4 is obtained, and the opening degree of the three-way valve 4 is feedforward controlled.
- the three-way valve 4 is controlled by inserting a temporary delay term, but the temporary delay term may be omitted. Moreover, it is good also as what does not add feedforward control.
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Abstract
Description
本発明の第1の態様に係る温水ヒートポンプは、熱源系統から熱を汲み取り温熱を出力する温熱出力熱交換器を有する温水ヒートポンプ本体と、前記温熱出力熱交換器から温熱を得る温水系統と、前記温水系統に設けられる三方弁と、前記温水ヒートポンプ本体および前記三方弁を制御する制御部と、を備え、前記制御部は、前記温熱出力熱交換器から導出された温水系統の一部を該温水出力熱交換器の上流側へ導くように前記三方弁の開度を制御する。
また、温熱出力熱交換器から温熱を得ることによって昇温した温水系統の一部を、温熱出力熱交換器に導かれる温水系統に循環させるように三方弁を制御する制御部を設けることにした。そのため、三方弁の開度を制御することによって温熱出力熱交換器に導かれる温水系統の温度を制御することができる。したがって、温熱出力熱交換器から温熱を直接得ることによって温水系統の昇温速度が速くなった場合であっても、温熱出力熱交換器から導出される温水系統の温度変動を制御することができる。
図1には、本発明の第1実施形態に係る温水ヒートポンプの概略構成図が示されている。
図1に示されているように、温水ヒートポンプ1は、温水ヒートポンプ本体2と、給水ポンプ3と、三方弁4とを備えている。
図2には、第1実施形態に係る温水ヒートポンプの制御方法のブロック線図が示されている。
入口側温水系統用温度検出器20によって検出された入口側温水系統5の温度が入口側温水系統目標温度に達していない場合には、入口側温水系統5の温度が入口側温水系統目標温度に達するように三方弁4をフィードバック制御する。
別途機器等を設けることなく入口側温水系統(温水系統)5は、温熱出力熱交換器から直接温熱を得ることとした。そのため、温熱が入口側温水系統5に直接付加されるため、出口側温水系統(温熱出力熱交換器から導出される温水系統)6の昇温速度が速くなる。したがって、温水ヒートポンプ1の設置費用の削減、温水ヒートポンプ1の小型化を図りつつ、出口側温水系統6の昇温時間を短縮することができる。
以下、本発明の第2実施形態について説明する。第2実施形態の温水ヒートポンプおよびこの制御方法は、上流入口温水系統に温度検出器と温熱出力熱交換器の入口に流量検出器とを備え、三方弁にフィードフォワード制御が追加される点で第1実施形態と相違するが、その他は第1実施形態と同様である。したがって、第1実施形態と同一の構成、制御方法については、同一の符号を付してその説明を省略する。
上流入口温水系統8には、上流入口側温水系統用温度検出器22が設けられている。上流入口側温水系統用温度検出器22は、循環温水系統7合流前の上流入口温水系統8の温度を検出するものである。
図5には、第2実施形態に係る温水ヒートポンプの制御方法のブロック線図が示されている。
制御部は、入口側温水系統5の温度が入口側温水系統目標温度に達していない場合には、入口側温水系統5の温度が入口側温水系統目標温度に達するように三方弁4をフィードバック制御する。
その後、上流入口側温水系統用温度検出器22によって検出された上流入口側温水系統8の温度と、入口側流量検出器23によって検出された入口側温水系統5の流量とに対するテーブルより、制御部は、三方弁4の開度を求める。
一方、出口側温水系統6の温度が出口側温水系統目標温度に達していない場合には、出口側温水系統6の温度が出口側温水系統目標温度に一致するように、制御部は、温水ヒートポンプ本体2の温熱出力をフィードバック制御する。
第2実施形態の温水ヒートポンプ1は、上流入口側温水系統(三方弁4によって昇温した温水系統が合流する上流側の温水系統)8の温度および温熱出力熱交換器の入口の入口側温水系統5の流量に応じて三方弁4の開度をフィードフォワード制御する制御部を備える。そのため、上流入口側温水系統(温水系統)8の温度や流量が急激に変化する場合であっても、三方弁4を制御することによって温熱出力熱交換器に導かれる入口側温水系統5の温度を制御することができる。したがって、出口側温水系統6の温度変動を抑制することができる。
以下、本発明の第3実施形態について説明する。第3実施形態の温水ヒートポンプおよびこの制御方法は、上流入口側温水系統に温度検出器と、温熱出力熱交換器の入口に流量検出器と、温水ヒートポンプ本体に導入される熱源系統に温度検出器とを備え、三方弁に温度補償項の制御が付加される点で第1実施形態と相違し、その他は第1実施形態と同様である。したがって、第1実施形態と同一の構成、制御方法については、同一の符号を付してその説明を省略する。
上流入口側温水系統8には、上流入口側温水系統用温度検出器22が設けられている。上流入口側温水系統用温度検出器22は、上流入口側温水系統8の温度を検出するものである。
図7には、第3実施形態に係る温水ヒートポンプの制御方法のブロック線図が示されている。
制御部は、入口側温水系統5の温度が入口側温水系統目標温度に達していない場合には、入口側温水系統5の温度が入口側温水系統目標温度に達するように三方弁4をフィードバック制御する。
さらに、制御部は、入口側温水系統5の温度と出口側温水系統6の温度との偏差を求める。制御部は、この偏差が所定差よりも大きい場合には、一次遅れ項を挿入する。その後、制御部は、出口側温水系統検出器21によって検出された出口側温水系統6の温度から、温度補償項を付加して三方弁4の制御を行う。温度補償項は、出口側温水系統6の温度と出口側温水系統目標温度との温度差を小さくするように補償するものである。
第3実施形態の温水ヒートポンプ1は、出口側温水系統6の温度から、出口側温水系統6の温度と出口側温水系統目標温度との温度差(偏差)を小さくするように補償する温度補償項を付加して三方弁4の開度を制御する制御部を備える。そのため、出口側温水系統6の温度が急激に変化する場合であっても、三方弁4を制御して温熱出力熱交換器に導かれる入口側温水系統5の温度を制御することができる。したがって、温熱出力熱交換器から導出される出口側温水系統6の温度変動を抑制することができる。
図8に、この場合の温水ヒートポンプの制御方法のブロック線図を参考例として示す。
制御部は、入口側温水系統5の温度が入口側温水系統目標温度に達していない場合には、入口側温水系統5の温度が入口側温水系統目標温度に達するように三方弁4をフィードバック制御する。
さらに、制御部は、入口側熱源系統9の温度が所定温度よりも高い又は低い場合には、一次遅れ項を挿入する。その後、制御部は、温度補償項を付加して三方弁4の制御を行う。温度補償項は、出口側温水系統6の温度と出口側温水系統目標温度との温度差を小さくするように補償するものであり、入口側熱源系統9の温度から求められる。
2 温水ヒートポンプ本体
4 三方弁
5 温水系統(入口側温水系統)
6 温水系統(出口側温水系統)
Claims (7)
- 熱源系統から熱を汲み取り温熱を出力する温熱出力熱交換器を有する温水ヒートポンプ本体と、
前記温熱出力熱交換器から温熱を得る温水系統と、
前記温水系統に設けられる三方弁と、 前記温水ヒートポンプ本体および前記三方弁を制御する制御部と、を備え、
前記制御部は、前記温熱出力熱交換器から導出された温水系統の一部を該温水出力熱交換器の上流側へ導くように前記三方弁の開度を制御する温水ヒートポンプ。 - 前記温熱出力熱交換器に導かれる温水系統に設けられる入口側温水系統用温度検出器と、
前記温熱出力熱交換器と前記三方弁との間の温水系統に設けられる出口側温水系統用温度検出器と、を備え、 前記制御部は、前記入口側温水系統用温度検出器によって検出される入口側温水系統温度が入口側温水系統目標温度になるように、前記三方弁の開度を制御する請求項1に記載の温水ヒートポンプ。 - 前記制御部は、前記出口側温水系統用温度検出器によって検出される出口側温水系統温度が出口側温水系統目標温度になるように、前記温水ヒートポンプ本体の温熱出力を制御する請求項1または請求項2に記載の温水ヒートポンプ。
- 前記制御部は、前記三方弁の開度および前記温熱出力をフィードバック制御する請求項1から請求項3のいずれかに記載の温水ヒートポンプ。
- 三方弁から導かれる温水系統が合流する上流側の温水系統に設けられる上流入口側温水系統用温度検出器と、
前記温熱出力熱交換器に導かれる温水系統の流量を検出する入口側流量検出器と、を備え、
前記制御部は、前記三方弁の開度を、前記上流入口側温水系統用温度検出器によって検出される上流入口側温水系統温度および前記入口側流量検出器によって検出される入口側流量を用いてフィードフォワード制御する請求項1から請求項4のいずれかに記載の温水ヒートポンプ。 - 前記制御部は、前記三方弁の開度を、前記出口側温水系統温度を用いて前記出口側温水系統温度を前記出口側温水系統目標温度に近づけるように補償する温度補償項を付加して制御する請求項1から請求項5のいずれかに記載の温水ヒートポンプ。
- 熱源系統から熱を汲み取り温熱を出力する温熱出力熱交換器を有する温水ヒートポンプ本体と、前記温熱出力熱交換器から温熱を得る温水系統と、前記温水系統に設けられる三方弁と、を備えた温水ヒートポンプの前記温水ヒートポンプ本体および前記三方弁を制御する温水ヒートポンプの制御方法であって、
前記温熱出力熱交換器から導出された温水系統の一部を該温水出力熱交換器の上流側へ導くように前記三方弁の開度を制御する温水ヒートポンプの制御方法。
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Cited By (5)
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CN103703323A (zh) * | 2011-11-11 | 2014-04-02 | 三菱重工业株式会社 | 温水加热系统以及控制装置及控制方法 |
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CN103703323B (zh) * | 2011-11-11 | 2016-06-08 | 三菱重工业株式会社 | 温水加热系统以及控制装置及控制方法 |
CN110513930A (zh) * | 2019-09-05 | 2019-11-29 | 四川长虹空调有限公司 | 空气源热泵机组变频压缩机加减载控制方法 |
CN110513930B (zh) * | 2019-09-05 | 2021-07-13 | 四川长虹空调有限公司 | 空气源热泵机组变频压缩机加减载控制方法 |
Also Published As
Publication number | Publication date |
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EP2543935A4 (en) | 2013-11-20 |
JP5729910B2 (ja) | 2015-06-03 |
CN102725591A (zh) | 2012-10-10 |
US9664415B2 (en) | 2017-05-30 |
EP2543935A1 (en) | 2013-01-09 |
KR20140108590A (ko) | 2014-09-11 |
KR20120104372A (ko) | 2012-09-20 |
CN102725591B (zh) | 2015-01-14 |
US20120280052A1 (en) | 2012-11-08 |
KR101570019B1 (ko) | 2015-11-17 |
JP2011185477A (ja) | 2011-09-22 |
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