EP2306111A1 - Heisswassersystem - Google Patents

Heisswassersystem Download PDF

Info

Publication number
EP2306111A1
EP2306111A1 EP09758278A EP09758278A EP2306111A1 EP 2306111 A1 EP2306111 A1 EP 2306111A1 EP 09758278 A EP09758278 A EP 09758278A EP 09758278 A EP09758278 A EP 09758278A EP 2306111 A1 EP2306111 A1 EP 2306111A1
Authority
EP
European Patent Office
Prior art keywords
hot
hot water
evaporator
storage tank
defrosting
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP09758278A
Other languages
English (en)
French (fr)
Inventor
Hidehiko Kataoka
Hideo Chikami
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Daikin Industries Ltd
Original Assignee
Daikin Industries Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP2008149139A external-priority patent/JP4479833B2/ja
Priority claimed from JP2008181385A external-priority patent/JP4479836B2/ja
Application filed by Daikin Industries Ltd filed Critical Daikin Industries Ltd
Publication of EP2306111A1 publication Critical patent/EP2306111A1/de
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • 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
    • F25B40/00—Subcoolers, desuperheaters or superheaters
    • 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
    • F24D11/0214—Central heating systems using heat accumulated in storage masses using heat pumps water heating system
    • 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
    • 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
    • F24H15/10—Control of fluid heaters characterised by the purpose of the control
    • F24H15/136—Defrosting or de-icing; Preventing freezing
    • 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
    • F24H15/00—Control of fluid heaters
    • F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
    • F24H15/305—Control of valves
    • F24H15/32—Control of valves of switching valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B30/00—Heat pumps
    • F25B30/02—Heat pumps of the compression type
    • 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
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
    • F25D21/06—Removing frost
    • F25D21/12—Removing frost by hot-fluid circulating system separate from the refrigerant system
    • 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
    • F24D2220/00—Components of central heating installations excluding heat sources
    • F24D2220/04—Sensors
    • F24D2220/042—Temperature sensors
    • 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
    • F24D2220/06—Heat exchangers
    • 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
    • F24D2220/08—Storage tanks
    • 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
    • F24D2220/20—Heat consumers
    • F24D2220/2009—Radiators
    • 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
    • F24D2220/20—Heat consumers
    • F24D2220/209—Sanitary water taps
    • 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
    • F24D2240/00—Characterizing positions, e.g. of sensors, inlets, outlets
    • F24D2240/10—Placed within or inside of
    • 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
    • F24D2240/00—Characterizing positions, e.g. of sensors, inlets, outlets
    • F24D2240/12—Placed outside of
    • 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
    • F24D2240/00—Characterizing positions, e.g. of sensors, inlets, outlets
    • F24D2240/26—Vertically distributed at fixed positions, e.g. multiple sensors distributed over the height of a tank, or a vertical inlet distribution pipe having a plurality of orifices
    • 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
    • F24H15/215—Temperature of the water before heating
    • 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
    • F24H15/219—Temperature of the water after heating
    • 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
    • F24H15/223—Temperature of the water in the water storage tank
    • F24H15/225—Temperature of the water in the water storage tank at different heights of the tank
    • 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
    • F24H15/254—Room temperature
    • 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
    • F24H15/258—Outdoor temperature
    • 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
    • F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
    • F24H15/305—Control of valves
    • F24H15/315—Control of valves of mixing valves
    • 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
    • F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
    • F24H15/335—Control of pumps, e.g. on-off control
    • 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
    • F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
    • F24H15/355—Control of heat-generating means in heaters
    • F24H15/37—Control of heat-generating means in heaters of electric 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
    • F24H15/00—Control of fluid heaters
    • F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
    • F24H15/375—Control of heat pumps
    • F24H15/38—Control of compressors 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
    • F24H15/00—Control of fluid heaters
    • F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
    • F24H15/375—Control of heat pumps
    • F24H15/385—Control of expansion valves of heat pumps
    • 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
    • F25B2309/00—Gas cycle refrigeration machines
    • F25B2309/06—Compression machines, plants or systems characterised by the refrigerant being carbon dioxide
    • 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
    • F25B2339/00—Details of evaporators; Details of condensers
    • F25B2339/04—Details of condensers
    • F25B2339/047—Water-cooled condensers

Definitions

  • the present invention relates to a hot water system for, for example, hot water supply apparatuses or space-heating and hot water supply apparatuses.
  • a space-heating and hot water supply apparatus including a heat pump unit placed outdoors, and a hot-water storage tank for storing hot water heated by the heat pump unit.
  • frost may be deposited on the evaporator.
  • frost deposited on the evaporator, the evaporator deteriorates in heat exchange performance, leading to incapability of sufficient space-heating. Therefore, it becomes indispensable to run defrosting operation for removing the frost from the evaporator.
  • This space-heating and hot water supply apparatus includes a heat pump unit, a hot-water storage tank and a space-heating terminal.
  • the heat pump unit has a fan, a first evaporator, a second evaporator, a compressor, a condenser, and an expansion valve.
  • the first evaporator is located upstream of the compressor and downstream of the second evaporator.
  • the first evaporator receives outside air fed from the fan, and takes in heat from the outside air.
  • hot water in the hot-water storage tank is fed to the second evaporator by a pump during the boil-up of the water in the hot-water storage tank by the heat pump unit.
  • a refrigerant that is just before entering the first evaporator is heated by the hot water, so that the frost deposited on the first evaporator can be melted down.
  • Patent Literature 1 JP 2004-108597 A
  • an object of the present invention is to provide a hot water system which allows the defrosting operation to be performed during the boil-up of water in the hot-water storage tank, and yet which allows the heat pump unit to be improved in COP even if such defrosting operation is performed.
  • hot water within the hot-water storage tank is thrown into flow through the defrosting circulation circuit by control of the flow control section.
  • the hot water passes through the second evaporator and thereafter returns again into the hot-water storage tank.
  • the refrigerant that has come into the second evaporator is heated by the hot water, and thereafter flows toward the first evaporator.
  • the refrigerant entering into the first evaporator increases in temperature, so that frost deposited on the first evaporator can be melted.
  • the hot water within the hot-water storage tank can be put into flow through the defrosting circulation circuit.
  • defrosting operation can be performed while the hot water within the hot-water storage tank is being boiled up.
  • the defrosting operation is performed by supplying hot water within the hot-water storage tank to the second evaporator
  • the hot water is lowered in temperature by the second evaporator and thereafter returns to the hot-water storage tank.
  • the COP of the heat pump unit is improved in the boil-up operation after the defrosting operation, so that improvement in the COP of the heat pump unit for total operation can be expected.
  • hot water stored in the hot-water storage tank flows through the space-heating circulation circuit to space-heating terminals and returns again to the hot-water storage tank.
  • heat of the hot water is radiated indoors via the space-heating terminals. That is, the space-heating terminals directly take out heat within the hot-water storage tank and radiate indoors.
  • the second evaporator is placed downstream of the first evaporator and upstream of the compressor.
  • the second evaporator is placed downstream of the first evaporator and upstream of the compressor. Therefore, the refrigerant increased in temperature by the first evaporator is heat-exchanged with hot water supplied from the hot-water storage tank to the second evaporator.
  • hot water supplied from the hot-water storage tank to the second evaporator can be prevented from freezing due to heat exchange with excessively cold refrigerant.
  • the hot water system of one embodiment further comprises a supercooling heat exchanger placed downstream of the first evaporator and upstream of the second evaporator.
  • a supercooling heat exchanger is placed downstream of the first evaporator and upstream of the second evaporator. Therefore, the refrigerant increased in temperature by the first evaporator is further increased in temperature by the supercooling heat exchanger. Then, the refrigerant further increased in temperature by the supercooling heat exchanger enters into the second evaporator, heat exchanging with hot water supplied from the hot-water storage tank to the second evaporator.
  • the hot water supplied from the hot-water storage tank to the second evaporator is less likely to freeze than in the case where no supercooling heat exchanger is placed downstream of the first evaporator and upstream of the second evaporator.
  • the second evaporator serve also as a supercooling heat exchanger.
  • the second evaporator serve also as a supercooling heat exchanger. Therefore, a supercooling heat exchanger does not need to be provided in addition to the second evaporator, so that the heat pump unit can be downsized.
  • the second evaporator has
  • the heat exchanger pipe is placed within the container. Therefore, the refrigerant that has come into the container is put into contact with the whole surface of the heat exchanger pipe.
  • heat of the hot water derived from the hot-water storage tank is efficiently transferred to the refrigerant within the container via the heat exchanger pipe.
  • the refrigerant flowing through the refrigerant circuit is a CO 2 refrigerant.
  • the heat pump unit is enabled to output high-temperature hot water.
  • a part of the heating circulation circuit on an upstream side of the condenser serves also as a part of the defrosting circulation circuit on an upstream side of the second evaporator. Therefore, if the part of the heating circulation circuit on the upstream side of the condenser is constructed, it is not necessary to construct the part of the defrosting circulation circuit on the upstream side of the second evaporator.
  • the flow control section is provided at a branch portion between the heating circulation circuit and the defrosting circulation circuit. Therefore, the flow of hot water through the heating circulation circuit and the flow of hot water through the defrosting circulation circuit can be controlled by one flow control section.
  • the hot water system of one embodiment further comprises a control section for controlling the flow control section so that a quantity of hot water flowing into the second evaporator during defrosting operation of the first evaporator becomes larger than a quantity of hot water flowing into the second evaporator during non-defrosting operation of the first evaporator.
  • the control section controls the flow control section so that a quantity of hot water flowing into the second evaporator during defrosting operation of the first evaporator becomes larger than a quantity of hot water flowing into the second evaporator during non-defrosting operation of the first evaporator.
  • the temperature of the refrigerant that has come into the second evaporator can reliably be increased up to a temperature that allows the defrosting of the first evaporator to be achieved.
  • the temperature sensing part senses a temperature of hot water that has come out from the second evaporator and directed toward the hot-water storage tank.
  • the control section controls the flow control section based on an output of the temperature sensing part so that the temperature of hot water coming out from the second evaporator and directed toward the hot-water storage tank is kept from becoming, for example, 0°C or lower. This makes it possible to reliably prevent cooling and freezing of hot water within the defrosting circulation circuit.
  • hot water within the hot-water storage tank is thrown into flow through the defrosting circulation circuit so as to enter into the second evaporator, by control of the flow control section.
  • the refrigerant coming into the second evaporator is heated by the hot water, increasing in temperature.
  • the refrigerant entering into the second evaporator after coming out from the second evaporator, flows through the refrigerant circuit and returns to the first evaporator, so that the frost deposited on the first evaporator can be melted.
  • the hot water within the hot-water storage tank can be put into flow through the defrosting circulation circuit.
  • defrosting operation can be performed while the hot water within the hot-water storage tank is being boiled up.
  • the defrosting operation is performed by supplying hot water within the hot-water storage tank to the second evaporator
  • the hot water is lowered in temperature by the second evaporator and thereafter returns to the hot-water storage tank.
  • the COP of the heat pump unit is improved in the boil-up operation after the defrosting operation, so that the COP of the heat pump unit for total operation can be improved.
  • Fig. 1 is a schematic view of a space-heating and hot water supply apparatus according to a first embodiment of the present invention
  • Fig. 1 is a schematic view showing a construction of a space-heating and hot water supply apparatus according to a first embodiment of the invention.
  • the space-heating and hot water supply apparatus includes a heat pump unit 1, a hot-water storage tank 2, a hot-water supplying heat exchanger 3, a space-heating circulation circuit 4, a boil-up circulation circuit 5 as an example of a heating circulation circuit, and a defrosting circulation circuit 50.
  • the heat pump unit 1 which includes a refrigerant circuit 16 and an electric blower 17, boils up the water in the hot-water storage tank 2 to make hot water.
  • the heat pump unit 1 is connected to the hot-water storage tank 2 via the boil-up circulation circuit 5.
  • the refrigerant circuit 16 has an evaporator 11, a compressor 12, a condenser 13, a supercooling heat exchanger 14, an expansion valve 15, and a defrosting heat exchanger 19.
  • a CO 2 refrigerant circulates.
  • the evaporator 11 is an example of the first evaporator
  • the expansion valve 15 is an example of the expansion mechanism
  • the defrosting heat exchanger 19 is an example of the second evaporator.
  • the supercooling heat exchanger 14 is placed downstream of the evaporator 11 and upstream of the defrosting heat exchanger 19. This arrangement makes it possible to lower the temperature of the CO 2 refrigerant directed from the condenser 13 toward the expansion valve 15.
  • the defrosting heat exchanger 19 is placed downstream of the supercooling heat exchanger 14 and upstream of the compressor 12.
  • the defrosting heat exchanger 19 is connected to the hot-water storage tank 2 via the defrosting circulation circuit 50.
  • hot water in the hot-water storage tank 2 can be supplied to the defrosting heat exchanger 19 so that the temperature of the CO 2 refrigerant directed from the supercooling heat exchanger 14 toward the compressor 12 can be raised.
  • the CO 2 refrigerant absorbs heat in the air fed from the electric blower 17 so as to be increased in temperature. Then, the CO 2 refrigerant is compressed by the compressor 12 so as to be further increased in temperature, and thereafter enters into the condenser 13 via the defrosting heat exchanger 19, dissipating heat. As a result, the CO 2 refrigerant becomes lower in temperature than that before entering into the condenser 13, and flows toward the supercooling heat exchanger 14. Then, the CO 2 refrigerant is further cooled by the supercooling heat exchanger 14, thereafter passing through the expansion valve 15 to return to the evaporator 11.
  • hot water in the hot-water storage tank 2 is supplied to the defrosting heat exchanger 19 via the defrosting circulation circuit 50. Therefore, the CO 2 refrigerant that has entered into the defrosting heat exchanger 19 is heat-exchanged with hot water derived from the hot-water storage tank 2 so as to be further increased in temperature.
  • the defrosting heat exchanger 19 is supplied with no hot water from the hot-water storage tank 2, so that the CO 2 refrigerant is not increased in temperature in the defrosting heat exchanger 19.
  • a branch valve 55 is provided in this defrosting circulation circuit 50.
  • This branch valve 55 has an inlet for inflow of hot water from the hot-water storage tank 2, and two outlets for outflow of hot water. One of the two outlets is connected to the condenser 13, and the other outlet is connected to the defrosting heat exchanger 19.
  • a degree of opening of the one outlet By controlling a degree of opening of the one outlet, the quantity of the hot water that enters into the condenser 13 can be controlled.
  • the degree of opening of the other outlet the quantity of the hot water that enters into the defrosting heat exchanger 19 can be controlled.
  • the degree of opening of each of the outlets of the branch valve 7 is controlled by a control section 7.
  • the branch valve 55 is an example of the flow control section.
  • boil-up circulation circuit 5 a boil-up circulating pump 51 and a boil-up three-way valve 52 are provided. Then, the boil-up circulation circuit 5 is connected to a second space-heating-forward connection port 42, a boil-up supply port 53, and an antifreezing water turn-back connection port 54.
  • a part of the boil-up circulation circuit 5 on the upstream side of the condenser 13 serves also as a part of the defrosting circulation circuit 50 on the upstream side of the defrosting heat exchanger 19. That is, a part between the hot-water storage tank 2 and the branch valve 55 where hot water flows is not only a part of the boil-up circulation circuit 5 but also a part of the defrosting circulation circuit 50.
  • the branch valve 55 is provided at a branch portion between the boil-up circulation circuit 5 and the defrosting circulation circuit 50.
  • the supply port 53 is provided at a lower portion of the hot-water storage tank 2. As a result of this, hot water in lower region within the hot-water storage tank 2 can be supplied to the boil-up circulating pump 51 via the supply port 53.
  • the boil-up circulating pump 51 sucks hot water in the lower part of the hot-water storage tank 2 and discharges the hot water toward the branch valve 55.
  • a variable flow rate pump or a constant flow rate circulating pump may be adopted.
  • the condenser 13 heat of the CO 2 refrigerant is transferred to the hot water, so that the hot water becomes high temperature (e.g., 60°C - 85°C).
  • the high-temperature hot water coming out from the condenser 13 is directed toward the boil-up three-way valve 52.
  • the boil-up three-way valve 52 makes a flow of the high-temperature hot water derived from the condenser 13 into an upper part within the hot-water storage tank 2 via the second space-heating-forward connection port 42. Since hot water coming out from the condenser 13 of the heat pump unit 1 has not yet become high temperature enough at start-up of the heat pump unit 1, the boil-up three-way valve 52 makes a flow of the high-temperature hot water derived from the condenser 13 into the lower region within the hot-water storage tank 2 via the antifreezing water turn-back connection port 54. As a result, it can be prevented that hot water that has not become high temperature enough in the condenser 13 turns back to the upper region within the hot-water storage tank 2 to disturb the temperature distribution within the hot-water storage tank 2.
  • This hot-water storage tank 2 is for storing hot water heated by the heat pump unit 1.
  • a heater 6 is placed generally at a central portion with regard to vertical direction within the hot-water storage tank 2, and the heater 6 directly heats the hot water in the hot-water storage tank 2.
  • a plurality of temperature sensors 40A, 40B, ..., 40E are provided on the hot-water storage tank 2 to detect hot-water temperatures of individual portions within the hot-water storage tank 2. These plural temperature sensors 40A, 40B, ..., 40E detect hot-water temperatures of individual portions within the hot-water Storage tank 2 and transmit signals indicative of those temperatures to the control section 7.
  • the hot-water supplying heat exchanger 3 formed of a coiled pipe, is placed so as to stretch from lower to upper regions in the hot-water storage tank 2.
  • Supply hot water is heated by flowing through within the hot-water supplying heat exchanger 3. More specifically, the supply hot water enters into the hot-water storage tank 2 at a lower portion of the hot-water storage tank 2, then flowing upward through the hot-water supplying heat exchanger 3 placed in the lower region within the hot-water storage tank 2.
  • the supply hot water then flows upward through the hot-water supplying heat exchanger 3 placed in the upper region within the hot-water storage tank 2, thereafter going out of the hot-water storage tank 2 from an upper portion of the hot-water storage tank 2.
  • a supply-hot-water mixing valve 31 is opened so that the supply hot water having come out of the hot-water storage tank 2 and supply hot water that is before flowing into the hot-water storage tank 2 are mixed together. As a result, the supply hot water coming out of the hot-water storage tank 2 can be decreased in temperature.
  • the space-heating circulation circuit 4 is for circulating hot water stored in the hot-water storage tank 2 by making the hot water passed through a plurality of space-heating terminals 8A, 8B, ... outside the hot-water storage tank 2 and thereafter turned back again into the hot-water storage tank 2.
  • the space-heating circulation circuit 4 is connected to the first, second space-heating-forward connection ports 41, 42 and a space-heating-backward connection port 43.
  • the first space-heating-forward connection port 41 is for taking out hot water in the hot-water storage tank 2.
  • the first space-heating-forward connection port 41 is provided generally at a central portion with regard to vertical direction within the hot-water storage tank 2 so as to be located near and above the heater 6. As a result, hot water immediately after being heated by the heater 6 can be taken out from the first space-heating-forward connection port 41 so as to be fed to the plurality of space-heating terminals 8A, 8B, ....
  • the second space-heating-forward connection port 42 is also for taking out hot water in the hot-water storage tank 2, like the first space-heating-forward connection port 41.
  • the second space-heating-forward connection port 42 is provided at an upper portion of the hot-water storage tank 2.
  • hot water in the upper region within the hot-water storage tank 2 can be taken out from the second space-heating-forward connection port 42 so as to be fed to the plurality of space-heating terminals 8A, 8B, ....
  • the second space-heating-forward connection port 42 serves also as a boil-up turn-back connection port.
  • Each of the space-heating terminals 8A, 8B, ... directly takes out the heat of hot water that has flowed up from the hot-water storage tank 2 and radiates the heat indoors. Then, the hot water lowers in temperature, going out of the space-heating terminals 8A, 8B, ... and flowing toward the space-heating-backward connection port 43.
  • the space-heating-backward connection port 43 is provided at a lower portion of the hot-water storage tank 2. As a result, the hot water that has come out from the space-heating-backward connection port 43 can be mixed with the hot water in the lower region within the hot-water storage tank 2.
  • a bypass pipe 44 Provided in the space-heating circulation circuit 4 are a bypass pipe 44, a space-heating mixing valve 45, temperature sensors 40F, 40G, a space-heating circulating pump 48, and a space-heating three-way valve 49.
  • the bypass pipe 44 guides part of the hot water, which flows from the space-heating terminals 8A, 8B, ... to the space-heating-backward connection port 43, to the space-heating mixing valve 45.
  • the space-heating mixing valve 45 has an inlet for inflow of hot water from the hot-water storage tank 2, and an inlet for inflow of hot water from the bypass pipe 44. As will be detailed later, the degree of opening of each of the inlets of the space-heating mixing valve 45 is controlled by the control section 7.
  • the control section 7 receives an output signal of an outside air temperature sensor 18, and output signals of the temperature sensors 40A, 40B, ..., 40G.
  • the control section 7 also receives a signal indicative of an indoor temperature from an indoor temperature sensor (not shown).
  • an output signal of the outside air temperature sensor 18 is a signal indicating a temperature of outside air
  • output signals of the temperature sensors 40A, 40B are signals indicating temperatures of hot water in the upper region within the hot-water storage tank 2
  • an output signal of the temperature sensor 40C is a signal indicating a temperature of hot water in a intermediate region with regard to vertical direction within the hot-water storage tank 2
  • output signals of the temperature sensors 40D, 40E are signals indicating temperatures of hot water in the lower region within the hot-water storage tank 2.
  • an output signal of the temperature sensor 40F is a signal indicating a temperature of hot water directed from the hot-water storage tank 2 toward the space-heating terminals 8A, 8B, ....
  • An output signal of the temperature sensor 40G is a signal indicating a temperature of hot water directed from the space-heating terminals 8A, 8B, ... toward the hot-water storage tank 2.
  • the space-heating circulating pump 48 sucks hot water within the hot-water storage tank 2 via the second space-heating-forward connection port 42 or the first space-heating-forward connection port 41, and discharges the hot water toward the plural space-heating terminals 8A, 8B,
  • the space-heating three-way valve 49 takes out hot water from the first space-heating-forward connection port 41 on condition that a high-temperature region of hot water within the hot-water storage tank 2 is present near the first space-heating-forward connection port 41. Also, the space-heating three-way valve 49 takes out hot water from the second space-heating-forward connection port 42 on condition that a high-temperature region of hot water within the hot-water storage tank 2 is absent near the first space-heating-forward connection port 41.
  • This switching of the space-heating three-way valve 49 is fulfilled by the control section 7. That is, the control section 7 switches over the space-heating three-way valve 49 based on signals from a plurality of temperature sensors for detecting temperatures of hot water in individual parts within the hot-water storage tank 2.
  • the control section 7 turns ON the space-heating circulating pump 48.
  • hot water stored in the hot-water storage tank 2 is fed to the plural space-heating terminals 8A, 8B, ..., and returns again to the hot-water storage tank 2.
  • the heat of the hot water is radiated indoors via the space-heating terminals 8. That is, the space-heating terminals 8A, 8B, ... directly take out heat of the hot water within the hot-water storage tank 2 to radiate the heat indoors.
  • control section 7 controls the compressor 12, the expansion valve 15, the boil-up circulating pump 51 and the branch valve 55 based on signals of the outside air temperature sensor 18, the temperature sensors 40A, 40B, ..., 40E and the indoor temperature sensor.
  • the control section 7 boils up the hot water within the hot-water storage tank 2 by the heat pump unit 1. More specifically, the control section 7 turns ON the compressor 12 and the boil-up circulating pump 51 and moreover opens the expansion valve 15. In this case, the control section 7 fully opens the condenser 13-side outlet of the branch valve 55, while the control section 7 fully closes the defrosting heat exchanger 19-side outlet of the branch valve 55.
  • the hot water present in the lower region within the hot-water storage tank 2 flows to the condenser 13, and the hot water heated to higher temperature by the condenser 13 is returned into the hot-water storage tank 2 via the second space-heating-forward connection port 42.
  • control section 7 starts defrosting operation on condition that the control section 7 decides from an output of the outside air temperature sensor 18 that defrosting operation for removing the frost of the evaporator 11 is needed.
  • the control section 7 increases the degree of opening of the expansion valve 15 while opening the defrosting heat exchanger 19-side outlet of the branch valve 55.
  • middle-temperature e.g., 30°C - 50°C
  • the middle-temperature hot water that has come into the defrosting heat exchanger 19 gives heat to the CO 2 refrigerant directed toward the compressor 12, resulting in low-temperature hot water.
  • This low-temperature hot water returns into the hot-water storage tank 2 via the antifreezing water turn-back connection port 54.
  • the middle-temperature hot water because of passing through the defrosting heat exchanger 19, decreases in temperature so as to be low-temperature hot water, returning to the lower region within the hot-water storage tank 2. Accordingly, when the hot water within the hot-water storage tank 2 is boiled up after an end of the defrosting operation, the low-temperature hot water in the lower region within the hot-water storage tank 2 is supplied to the heat pump unit 1. As a result of this, the COP of the heat pump unit 1 is improved, thus making it expectable to improve the COP of the heat pump unit 1 for total operation.
  • the defrosting heat exchanger 19 is placed on the downstream side of the supercooling heat exchanger 14, the CO 2 refrigerant that has been increased in temperature by the evaporator 11 and the supercooling heat exchanger 14 absorbs heat from the middle-temperature hot water flowing through the defrosting circulation circuit 50. That is, the middle-temperature hot water is cooled by the CO 2 refrigerant.
  • the middle-temperature hot water is cooled by the CO 2 refrigerant.
  • the CO 2 refrigerant has been increased in temperature by the evaporator 11 and the supercooling heat exchanger 14 so as not to be excessively cold, the middle-temperature hot water can be prevented from being frozen.
  • the heat pump unit 1 uses the CO 2 refrigerant, high-temperature hot water can be obtained from the condenser 13.
  • a part of the boil-up circulation circuit 5 on the upstream side of the condenser 13 serves also as a part of the defrosting circulation circuit 50 on the upstream side of the defrosting heat exchanger 19. Therefore, if the part of the boil-up circulation circuit 5 on the upstream side of the condenser 13 is constructed, it is not necessary to construct the part of the defrosting circulation circuit 50 on the upstream side of the defrosting heat exchanger 19.
  • control section 7 turns ON the boil-up circulating pump 51 and opens the defrosting heat exchanger 19-side outlet of the branch valve 55, allowing a small quantity of hot water to flow to the defrosting circulation circuit 50. This makes it possible to prevent cooling and freezing of hot water remaining within the defrosting circulation circuit 50.
  • Fig. 1 is a schematic view showing a construction of a space-heating and hot water supply apparatus according to a second embodiment of the invention.
  • Fig. 2 the same component members as those of the first embodiment shown in Fig. 1 are designated by the same reference signs as those of the component members in Fig. 1 , with their description omitted.
  • the space-heating and hot water supply apparatus includes a defrosting heat exchanger 219 instead of the supercooling heat exchanger 14 and the defrosting heat exchanger 19 of the first embodiment.
  • the defrosting heat exchanger 219 uses hot water within the defrosting circulation circuit 50 to heat the CO 2 refrigerant directed from the evaporator 11 toward the compressor 12 as well as to cool the CO 2 refrigerant directed from the condenser 13 toward the expansion valve 15. That is, the defrosting heat exchanger 219 has functions of both the supercooling heat exchanger 14 and the defrosting heat exchanger 19 of the first embodiment.
  • part of the refrigerant circuit 16 between the evaporator 11 and the compressor 12 is brazed to part of the refrigerant circuit 16 between the condenser 13 and the expansion valve 15.
  • part of the defrosting circulation circuit 50 is also brazed to part of the refrigerant circuit 16 between the condenser 13 and the expansion valve 15.
  • the heat pump unit 1 can be downsized, compared with the first embodiment.
  • Fig. 3 is a schematic view showing a construction of a space-heating and hot water supply apparatus according to a third embodiment of the invention.
  • the same component members as those of the second embodiment shown in Fig. 2 are designated by the same reference signs as those of the component members in Fig. 2 , with their description omitted.
  • the space-heating and hot water supply apparatus includes a temperature sensor 40H as an example of a temperature sensing part.
  • This temperature sensor 40H is provided on the defrosting circulation circuit 50 so as to be positioned on downstream side of the defrosting heat exchanger 219.
  • the temperature sensor 40H detects a temperature of low-temperature hot water directed from the defrosting heat exchanger 19 toward the hot-water storage tank 2, and outputs a signal indicative of the temperature to the control section 7.
  • the control section 7 controls the degree of opening of the defrosting heat exchanger 219-side outlet of the branch valve 55 based on a signal derived from the temperature sensor 40H so that the temperature of low-temperature hot water directed from the defrosting heat exchanger 19 toward the hot-water storage tank 2 is kept from going 0°C or lower as an example.
  • Fig. 4 is a schematic view showing a construction of a space-heating and hot water supply apparatus according to a fourth embodiment of the invention.
  • the same component members as those of the first embodiment shown in Fig. 1 are designated by the same reference signs as those of the component members in Fig. 1 , with their description omitted.
  • the space-heating and hot water supply apparatus includes a defrosting heat exchanger 419 instead of the defrosting heat exchanger 19 of the first embodiment.
  • This defrosting heat exchanger 419 has a container 461, and a coiled heat exchanger pipe 462 placed within the container 461.
  • the CO 2 refrigerant coming out from the evaporator 11 passes through the supercooling heat exchanger 14 and then enters the container 461. Since the heat exchanger pipe 462 is placed within the container 461, the CO 2 refrigerant comes into contact with the whole surface of the heat exchanger pipe 462.
  • the heat pump unit 1 employs CO 2 refrigerant.
  • CO 2 refrigerant NH 3 refrigerant, R22 refrigerant and the like may also be used.
  • first to fourth embodiments may be combined in their contents as embodiments of the invention.
  • space-heating terminals 8A, BB, ... as well as the space-heating circulation circuit 4 and the like associated therewith may be omitted from the first to fourth embodiments to provide a hot water supply apparatus. That is, the present invention may be applied to hot water supply apparatuses dedicated exclusively to supply of hot water without being limited to space-heating and hot water supply apparatuses.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Heat-Pump Type And Storage Water Heaters (AREA)
EP09758278A 2008-06-06 2009-06-01 Heisswassersystem Withdrawn EP2306111A1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2008149139A JP4479833B2 (ja) 2008-06-06 2008-06-06 温水システム
JP2008181385A JP4479836B2 (ja) 2008-07-11 2008-07-11 温水システム
PCT/JP2009/059960 WO2009148011A1 (ja) 2008-06-06 2009-06-01 温水システム

Publications (1)

Publication Number Publication Date
EP2306111A1 true EP2306111A1 (de) 2011-04-06

Family

ID=41398089

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09758278A Withdrawn EP2306111A1 (de) 2008-06-06 2009-06-01 Heisswassersystem

Country Status (2)

Country Link
EP (1) EP2306111A1 (de)
WO (1) WO2009148011A1 (de)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014072743A1 (en) * 2012-11-09 2014-05-15 BASILE, Martino Heating system
EP2333457A3 (de) * 2009-12-11 2015-06-24 LG ELectronics INC. Wasserzirkulationsvorrichtung im Zusammenhang mit einem Kühlsystem
GB2532439A (en) * 2014-11-18 2016-05-25 Star Refrigeration Improved air-source heat pump
EP3290827A1 (de) * 2016-08-31 2018-03-07 Vaillant GmbH Abtauen ohne umkehrung des kältemittelkreislaufs
WO2018137789A1 (en) * 2017-01-30 2018-08-02 Integrate Nv Heat pump device
US10663212B2 (en) * 2017-09-04 2020-05-26 Sinjinenc Chilling system using waste heat recovery by chiller discharge gas
CN111365895A (zh) * 2018-12-26 2020-07-03 浙江省化工研究院有限公司 一种高效环保的余热回收系统及传热方法
US11149985B2 (en) 2019-05-31 2021-10-19 Mitsubishi Electric Us, Inc. System and method for heating water
WO2022168046A1 (en) * 2021-02-07 2022-08-11 Octopus Energy Group Limited Methods and systems and apparatus to support reduced energy and water usage
WO2023105210A1 (en) * 2021-12-07 2023-06-15 Mixergy Limited Water heating system and a controller therefor
GB2621209A (en) * 2022-08-01 2024-02-07 Mixergy Ltd Water heating system
US20240044522A1 (en) * 2021-02-07 2024-02-08 Octopus Energy Heating Limited Methods and systems and apparatus to support reduced energy and water usage

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106196253A (zh) * 2015-05-05 2016-12-07 广东纽恩泰新能源科技发展有限公司 一种热水采暖机水路系统

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59180228A (ja) * 1983-03-30 1984-10-13 Matsushita Electric Ind Co Ltd ヒ−トポンプ給湯暖冷房機
JP2003090637A (ja) * 2001-07-12 2003-03-28 Sekisui Chem Co Ltd ヒートポンプ
JP4178446B2 (ja) 2002-09-13 2008-11-12 三菱電機株式会社 ヒートポンプシステム
JP2004198037A (ja) * 2002-12-19 2004-07-15 Sanyo Electric Co Ltd 給湯システム
JP3894190B2 (ja) * 2003-11-19 2007-03-14 松下電器産業株式会社 ヒートポンプ給湯装置
JP4049090B2 (ja) * 2003-12-01 2008-02-20 松下電器産業株式会社 ヒートポンプ給湯機
JP3876911B2 (ja) * 2005-06-29 2007-02-07 ダイキン工業株式会社 給湯装置
JP2007198637A (ja) * 2006-01-25 2007-08-09 Corona Corp ヒートポンプ式給湯装置

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2009148011A1 *

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2333457A3 (de) * 2009-12-11 2015-06-24 LG ELectronics INC. Wasserzirkulationsvorrichtung im Zusammenhang mit einem Kühlsystem
WO2014072743A1 (en) * 2012-11-09 2014-05-15 BASILE, Martino Heating system
GB2532439A (en) * 2014-11-18 2016-05-25 Star Refrigeration Improved air-source heat pump
EP3290827A1 (de) * 2016-08-31 2018-03-07 Vaillant GmbH Abtauen ohne umkehrung des kältemittelkreislaufs
CN107796141A (zh) * 2016-08-31 2018-03-13 威能有限公司 能够不反转制冷剂循环以进行除霜操作的热泵设备
WO2018137789A1 (en) * 2017-01-30 2018-08-02 Integrate Nv Heat pump device
US10663212B2 (en) * 2017-09-04 2020-05-26 Sinjinenc Chilling system using waste heat recovery by chiller discharge gas
CN111365895A (zh) * 2018-12-26 2020-07-03 浙江省化工研究院有限公司 一种高效环保的余热回收系统及传热方法
US11149985B2 (en) 2019-05-31 2021-10-19 Mitsubishi Electric Us, Inc. System and method for heating water
WO2022168046A1 (en) * 2021-02-07 2022-08-11 Octopus Energy Group Limited Methods and systems and apparatus to support reduced energy and water usage
US20240044522A1 (en) * 2021-02-07 2024-02-08 Octopus Energy Heating Limited Methods and systems and apparatus to support reduced energy and water usage
WO2023105210A1 (en) * 2021-12-07 2023-06-15 Mixergy Limited Water heating system and a controller therefor
GB2621209A (en) * 2022-08-01 2024-02-07 Mixergy Ltd Water heating system

Also Published As

Publication number Publication date
WO2009148011A1 (ja) 2009-12-10

Similar Documents

Publication Publication Date Title
EP2306111A1 (de) Heisswassersystem
EP2151633B1 (de) Heißwassersystem, das mit einer Wärmepumpe verbunden ist, und Verfahren zur Steuerung dieses Systems
JP5003645B2 (ja) 熱交換器および温水システム
JP2008096044A (ja) 貯湯式給湯装置
JP5141486B2 (ja) 熱交換器および温水システム
JP2007093207A (ja) ヒートポンプ給湯装置
JP2009210195A (ja) 給湯装置
JP4502020B2 (ja) 暖房給湯装置
JP2003090653A (ja) ヒートポンプ式給湯機
KR100563178B1 (ko) 히트 펌프 급탕기
JP4479836B2 (ja) 温水システム
JP2009287843A (ja) 室外機及びヒートポンプ装置
JP2007322084A (ja) ヒートポンプ給湯機
CN211120159U (zh) 一种空调系统
JPH08152193A (ja) 給湯装置
JP3915799B2 (ja) ヒートポンプ式給湯装置
JP4790538B2 (ja) 貯湯式給湯暖房装置
KR20170042486A (ko) 난방 장치
JP2006023005A (ja) ヒートポンプ式給湯装置
JP4479833B2 (ja) 温水システム
JP4567909B2 (ja) ヒートポンプ式給湯装置
JP4072140B2 (ja) 貯湯式給湯装置
JP2005233444A (ja) ヒートポンプ式給湯装置
JP2012207915A (ja) 熱交換器および温水システム
WO2010038572A1 (ja) 熱交換器および温水システム

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20101125

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL BA RS

DAX Request for extension of the european patent (deleted)
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN

18W Application withdrawn

Effective date: 20140423