EP4310416A1 - Système de climatisation multiple hybride - Google Patents

Système de climatisation multiple hybride Download PDF

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Publication number
EP4310416A1
EP4310416A1 EP23186282.2A EP23186282A EP4310416A1 EP 4310416 A1 EP4310416 A1 EP 4310416A1 EP 23186282 A EP23186282 A EP 23186282A EP 4310416 A1 EP4310416 A1 EP 4310416A1
Authority
EP
European Patent Office
Prior art keywords
hot water
water supply
heat exchanger
expansion valve
temperature
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.)
Pending
Application number
EP23186282.2A
Other languages
German (de)
English (en)
Inventor
Yejin Kim
Eunjun Cho
Woojoo Choi
Jihyeong RYU
Dongkeun Yang
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.)
LG Electronics Inc
Original Assignee
LG Electronics Inc
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
Application filed by LG Electronics Inc filed Critical LG Electronics Inc
Publication of EP4310416A1 publication Critical patent/EP4310416A1/fr
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B29/00—Combined heating and refrigeration systems, e.g. operating alternately or simultaneously
    • F25B29/003—Combined heating and refrigeration systems, e.g. operating alternately or simultaneously of the compression type system
    • 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
    • F24D17/0005—Domestic hot-water supply systems using recuperation of waste heat
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D17/00—Domestic hot-water supply systems
    • F24D17/02—Domestic hot-water supply systems using heat pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D19/00—Details
    • F24D19/10—Arrangement or mounting of control or safety devices
    • F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
    • F24D19/1051—Arrangement or mounting of control or safety devices for water heating systems for domestic hot water
    • 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
    • F24D19/1051—Arrangement or mounting of control or safety devices for water heating systems for domestic hot water
    • F24D19/1054—Arrangement or mounting of control or safety devices for water heating systems for domestic hot water 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
    • F24D19/00—Details
    • F24D19/10—Arrangement or mounting of control or safety devices
    • F24D19/1084—Arrangement or mounting of control or safety devices for air heating systems
    • F24D19/1087—Arrangement or mounting of control or safety devices for air heating systems system using 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
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D5/00—Hot-air central heating systems; Exhaust gas central heating systems
    • F24D5/12—Hot-air central heating systems; Exhaust gas central heating systems using heat pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/65—Electronic processing for selecting an operating mode
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
    • F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/89—Arrangement or mounting of control or safety devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/30—Arrangement or mounting of heat-exchangers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
    • F24F3/06—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the arrangements for the supply of heat-exchange fluid for the subsequent treatment of primary air in the room units
    • F24F3/065—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the arrangements for the supply of heat-exchange fluid for the subsequent treatment of primary air in the room units with a plurality of evaporators or condensers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
    • F24F5/0007—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning
    • F24F5/001—Compression cycle type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
    • F24F5/0096—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater combined with domestic apparatus
    • 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
    • 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
    • F24H4/00—Fluid heaters characterised by the use of heat pumps
    • F24H4/02—Water heaters
    • F24H4/04—Storage 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
    • F25B13/00—Compression machines, plants or systems, with reversible cycle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B30/00—Heat pumps
    • F25B30/06—Heat pumps characterised by the source of low potential heat
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
    • F25B41/24—Arrangement of shut-off valves for disconnecting a part of the refrigerant cycle, e.g. an outdoor part
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B41/00—Fluid-circulation arrangements
    • F25B41/40—Fluid line arrangements
    • F25B41/42—Arrangements for diverging or converging flows, e.g. branch lines or junctions
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    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B49/00—Arrangement or mounting of control or safety devices
    • F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
    • 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
    • F25B6/00—Compression machines, plants or systems, with several condenser circuits
    • F25B6/02—Compression machines, plants or systems, with several condenser circuits arranged in parallel
    • 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
    • F25B6/00—Compression machines, plants or systems, with several condenser circuits
    • F25B6/04—Compression machines, plants or systems, with several condenser circuits arranged in series
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D2200/00—Heat sources or energy sources
    • F24D2200/16—Waste heat
    • F24D2200/31—Air conditioning systems
    • 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
    • F24D2220/0242—Multiple way valves
    • 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
    • F24D2220/0271—Valves
    • 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
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2221/00—Details or features not otherwise provided for
    • F24F2221/18—Details or features not otherwise provided for combined with domestic apparatus
    • F24F2221/183—Details or features not otherwise provided for combined with domestic apparatus combined with a hot-water boiler
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
    • F25B2313/005—Outdoor unit expansion 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
    • F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
    • F25B2313/023—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple indoor units
    • F25B2313/0231—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple indoor units with simultaneous cooling and heating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
    • F25B2313/023—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple indoor units
    • F25B2313/0233—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple indoor units in parallel arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
    • F25B2313/027—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means
    • F25B2313/02741—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means using one four-way valve
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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    • 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
    • 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
    • F25B2600/00—Control issues
    • F25B2600/25—Control of valves
    • F25B2600/2519—On-off 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
    • F25B2700/00—Sensing or detecting of parameters; Sensors therefor
    • F25B2700/19—Pressures
    • F25B2700/193—Pressures of the compressor
    • F25B2700/1931—Discharge pressures
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    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2700/00—Sensing or detecting of parameters; Sensors therefor
    • F25B2700/21—Temperatures
    • F25B2700/2115—Temperatures of a compressor or the drive means therefor
    • F25B2700/21152—Temperatures of a compressor or the drive means therefor at the discharge side of the compressor
    • 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
    • F25B2700/00—Sensing or detecting of parameters; Sensors therefor
    • F25B2700/21—Temperatures
    • F25B2700/2116—Temperatures of a condenser
    • F25B2700/21161—Temperatures of a condenser of the fluid heated by the condenser

Definitions

  • the present specification relates to a hybrid multi-air conditioning system. More specifically, the present specification relates to a hybrid multi-air conditioning system including a water tank heat exchanger and a control method thereof.
  • a hybrid system capable of simultaneous cooling and hot water supply operation uses a plate heat exchanger such as a hydro-kit when using a water tank to firstly perform refrigerant-water heat exchange with the air-side cycle, and to secondly perform water-water heat exchange between the hydro-kit and the water tank.
  • a plate heat exchanger such as a hydro-kit when using a water tank to firstly perform refrigerant-water heat exchange with the air-side cycle, and to secondly perform water-water heat exchange between the hydro-kit and the water tank.
  • Korean Patent Publication No. 1 0-2010-0023877 discloses a heat pump type hot water supply device.
  • the amount of condensation heat on the refrigerant side can be controlled by the flow rate of water.
  • the refrigerant-side condensation heat exchanger is directly wound around the water tank, the condensation heat amount varies according to the water temperature inside the water tank and the user's water consumption, so the control point of the water tank condenser changes.
  • the water tank and the outdoor device side heat exchanger are operated by a condenser and are divided into two, and expansion valves are installed at the water tank outlet and the outdoor device outlet, respectively, and refrigerant is sent to the indoor device-side expansion valve.
  • the refrigerant discharged from each condenser must pass through two expansion valves until the refrigerant is changed from high pressure to low pressure, wherein if the opening of the expansion valve is too small, excessive pressure loss occurs and two-phase refrigerant enters the expansion valve.
  • the evaporation temperature of the evaporator is greatly reduced, and the evaporation temperature reduction may cause cycle hunting and limit control entry.
  • a first problem to be solved by the present disclosure is to provide a hybrid multi-air conditioning system in which a heat exchanger for heating a water tank and a heat exchanger for an outdoor device are disposed in series to increase the flow rate of refrigerant in the superheating degree section, thereby securing hot water supply performance.
  • a second problem of the present disclosure is to provide a hybrid multi-air conditioning system capable of more stably realizing a cycle and lowering a condensation temperature by securing supercooling of a heat exchanger for an outdoor device.
  • a third problem of the present disclosure is to provide a hybrid multi-air conditioning system capable of operating only a heat exchanger for a water tank as a condenser or operating only a heat exchanger for an outdoor device as a condenser.
  • a fourth problem of the present disclosure is to provide a hybrid multi-air conditioning system in which a water tank can firstly perform heat exchange by directly exchanging heat between a refrigerant and water.
  • the fifth problem of the present disclosure is to provide a hybrid multi-air conditioning system that can prevent two-phase refrigerant from entering by adjusting the opening of the first hot water supply expansion valve and the outdoor expansion valve without installing a separate receiver and thus controlling the optimal degree of supercooling.
  • a sixth problem of the present disclosure is to provide a hybrid multi-air conditioning system capable of simultaneous operation of hot water supply and cooling as well as operation of hot water supply and heating.
  • a multiple air conditioning system of the present disclosure includes a hot water supply unit including a hot water supply heat exchanger for exchanging heat between the refrigerant and water accommodated in the water tank and a first hot water supply expansion valve for blocking or flowing the refrigerant condensed from the hot water supply heat exchanger; at least one indoor device installed indoors and including an indoor heat exchanger and an indoor expansion valve; and an outdoor device connected to the indoor device and the hot water supply unit through a refrigerant pipe and including an outdoor heat exchanger, a compressor, and an outdoor expansion valve.
  • the multiple air conditioning system may include a second hot water supply discharge pipe having one side branched from the first hot water supply discharge pipe connecting the hot water supply heat exchanger and the indoor heat exchanger and the other side joining the first discharge pipe connecting the compressor and the outdoor heat exchanger.
  • the multiple air conditioning system may include a second hot water supply expansion valve installed on the second hot water supply discharge pipe.
  • the hybrid multi-air conditioning system may further include a first temperature sensor installed to detect the water temperature in the water tank.
  • the hybrid multi-air conditioning system may further include a second temperature sensor installed at a rear end of the compressor.
  • the hybrid multi-air conditioning system may further include a first pressure sensor installed at the rear end of the compressor.
  • the hot water supply heat exchanger may wind the outer wall of the water tank in a coil form and may exchange heat between the refrigerant and water while the refrigerant flows into the inside of the hot water supply heat exchanger.
  • the outdoor device may include a hot water supply valve for flowing the compressed refrigerant from the compressor to the hot water supply unit; and a discharge valve for flowing the compressed refrigerant from the compressor to the outdoor heat exchanger or the indoor heat exchanger.
  • the outdoor device may further include a four-way valve for transferring the refrigerant passing through the discharge valve to the outdoor heat exchanger or to the indoor heat exchanger.
  • each indoor heat exchanger may be connected in parallel.
  • a first hot water supply expansion valve may be installed at a rear end of a branch point of the second hot water supply discharge pipe in the first hot water supply discharge pipe.
  • either the hot water supply heat exchanger or the outdoor heat exchanger may operate as a condenser, or the hot water supply heat exchanger and the outdoor heat exchanger may operate as a condenser.
  • one of the first hot water supply expansion valve and the second hot water supply expansion valve may be opened and the other may be blocked.
  • the first hot water supply expansion valve when the temperature of the water accommodated in the water tank is the reference temperature or less and when the cooling load is lower than the reference value, the first hot water supply expansion valve may be opened and the second hot water supply expansion valve may be blocked.
  • the hot water supply heat exchanger may operate as a condenser.
  • the second hot water supply expansion valve when the temperature of the water accommodated in the water tank is the reference temperature or less and, when the cooling load is higher than the reference value, the second hot water supply expansion valve may be opened and the first hot water supply expansion valve may be blocked.
  • the hot water supply heat exchanger and the outdoor heat exchanger may operate as condensers.
  • the second hot water supply expansion valve when the temperature of the water accommodated in the water tank is the reference temperature or more and, when the cooling load is higher than the reference value, the second hot water supply expansion valve may be opened and the first hot water supply expansion valve may be blocked.
  • the hot water supply heat exchanger and the outdoor heat exchanger may operate as condensers.
  • the first hot water supply expansion valve may be opened or the second hot water supply expansion valve may be opened according to the discharge the superheating degree of the compressor.
  • the outdoor heat exchanger may operate. as a condenser.
  • the water tank may be heated by a separate heater.
  • FIG. 1 is a schematic configuration diagram illustrating a hybrid multi-air conditioning system according to an embodiment of the present disclosure
  • FIG. 2 is a detailed configuration diagram illustrating a hybrid multi-air conditioning system according to an embodiment of the present disclosure of FIG. 1 .
  • the hybrid multi-air conditioning system 100 includes a hot water supply unit 30, at least one indoor device 20 for both heating and cooling, and a outdoor device 10 for both heating and cooling.
  • the hot water supply unit 30 consists of a water tank 31 that is long in the vertical direction while storing water for hot water supply, a water circulation pipe supplying water from the outside to the bottom of the water tank 31 and discharging the heated water to the outside through the top of the water tank 310, and a hot water supply heat exchanger 32 attached to the outside of the water tank 31 and coupled to enable heat dissipation.
  • the heat exchange between the water tank 31 and the hot water supply heat exchanger 32 is performed by heat exchange between the refrigerant flowing through the hot water supply heat exchanger 32 and the water inside the water tank 31, and the hot water supply heat exchanger 32 acts as a condenser that performs a heat dissipation function.
  • the pipe through which the refrigerant flows directly winds the outer wall of the water tank 31 in a coil shape to increase the contact area, thereby exchanging heat.
  • the hot water supply heat exchanger 32 has a hot water supply input pipe 34 connected to the second discharge pipe 42 of the outdoor device 10 and a first hot water supply discharge pipe 35 flowing the condensed liquid refrigerant after heat exchange with the water tank 31.
  • the first hot water supply discharge pipe 35 is connected to a first node n1 connecting the indoor device 20, the outdoor device 10, and the hot water supply unit 10.
  • a first hot water supply expansion valve 33 may be disposed in the first hot water supply discharge pipe 35 of the hot water supply heat exchanger 32.
  • the first hot water supply expansion valve 33 formed in the discharge portion of the hot water supply heat exchanger 32 may be an electronic expansion valve, adjusts the flow rate of the refrigerant flowing through the pipe of the hot water supply heat exchanger 32, and flows the condensed refrigerant into the outdoor device 10 or the indoor device 20.
  • the indoor device 10 for both heating and cooling includes a compressor 13, an outdoor heat exchanger 11, an outdoor heat exchanger fan 12, and a switching means.
  • the switching means includes a four-way valve 14.
  • the compressor 13 may include a plurality of compressors 13 connected in parallel, but is not limited thereto.
  • An accumulator may be formed at the input end of the compressor 13.
  • the first compressor may be an inverter compressor capable of varying the compression capacity of the refrigerant
  • the second compressor may be a constant speed compressor having a constant compression capacity of the refrigerant.
  • the low-pressure connection pipe 46 connected to the indoor device 20 is connected to the input pipe 45 of the compressor 13 via the four-way valve 14.
  • the first and second discharge pipes 42 and 43 are connected to the discharge portion 41 of the compressor 13 as a high-pressure connection pipe.
  • the first discharge pipe 43 flows the discharged high-temperature and high-pressure gaseous refrigerant into the outdoor heat exchanger 11.
  • the second discharge pipe 42 flows the discharged high-temperature and high-pressure gaseous refrigerant into the hot water supply unit 30 and is connected to the hot water supply heat exchanger 32.
  • the first discharge pipe 43 passes through the four-way valve 14 and is connected to the outdoor heat exchanger 11.
  • the second discharge pipe 42 bypasses the refrigerant discharged from the compressor 13 without passing through the four-way valve 14 and is connected to the hot water supply heat exchanger 32.
  • the outdoor heat exchanger 11 is connected to the four-way valve 14 through the first discharge pipe 43.
  • the refrigerant is condensed or evaporated by heat exchange with outdoor air.
  • the outdoor device fan 12 introduces air into the outdoor heat exchanger 11.
  • the outdoor heat exchanger 11 is used as a condenser during cooling operation, and the outdoor heat exchanger 11 is used as an evaporator during heating operation.
  • An outdoor expansion valve 17 is installed on the liquid pipe connection pipe 44 connecting the outdoor heat exchanger 11 and the indoor device.
  • the outdoor expansion valve 17 expands the refrigerant during heating operation.
  • the outdoor expansion valve 17 expands the refrigerant condensed in the plurality of indoor heat exchangers 21 during heating operation before flowing into the outdoor heat exchanger 11.
  • the four-way valve 14 is provided in the discharge portion 41 of the compressor 13 and switches the flow path of the refrigerant flowing in the outdoor device 10.
  • the four-way valve 14 properly switches the flow path of the refrigerant discharged from the compressor 13 according to the hot water supply, cooling and heating operation of the hybrid multi-air conditioning system 100.
  • Such an outdoor device 10 for both heating and cooling includes a hot water supply valve 15 between the second discharge pipe 42 and the hot water supply input pipe 34 and includes a discharge valve 16 between the first discharge pipe 43 and the discharge portion 41 of the compressor 13.
  • the hot water supply valve 15 and the discharge valve 16 may be solenoid valves that selectively operate to block or flow the refrigerant as needed.
  • the hot water supply valve 15 and the discharge valve 16 do not need to operate the hot water supply operation when the water temperature reaches the user's desired water temperature during cooling and hot water supply and heating and hot water supply operations.
  • the hot water valve 15 when the hot water valve 15 is closed, only the outdoor device 10 serves as a condenser during cooling operation, and only the indoor device 20 serves as a condenser during heating operation.
  • the outdoor device 10 may further include a supercooling device (not illustrated) on the liquid pipe connection pipe 44, and the supercooling device cools the refrigerant transferred to the indoor device 20 during cooling operation.
  • a supercooling device (not illustrated) on the liquid pipe connection pipe 44, and the supercooling device cools the refrigerant transferred to the indoor device 20 during cooling operation.
  • the hybrid multi-air conditioning system 100 includes at least one indoor device 20.
  • a plurality of indoor devices 20 for both heating and cooling may be connected to one outdoor device 10, and three indoor devices B1, B2, and B3 are illustrated in FIGS. 1 and 2 , but the present disclosure is not limited thereto.
  • Each of the indoor devices B1, B2, and B3 for both heating and cooling includes an indoor heat exchanger 21, an indoor expansion valve 22, and an indoor fan 23, respectively, and as illustrated in FIG. 2 , when three indoor devices B1, B2, and B3 are installed, the first, second, and third indoor heat exchangers 21, the first, second, and third indoor expansion valves 22 and the first, second, and third indoor device fans 23 are included.
  • the first, second, and third indoor expansion valves 22 are installed on the first, second, and third indoor connection pipes 26 connecting the first, second, and third indoor heat exchangers 21 and the first node n1.
  • the first, second, and third indoor connection pipes 26 are connected to the liquid pipe connection pipe 44 of the outdoor device 10 at the first node n1.
  • Each of the indoor devices B1, B2, and B3 for both cooling and heating may be connected in parallel.
  • Each of the indoor devices B1, B2, and B3 for both cooling and heating may be connected in series.
  • the first, second, and third indoor devices B1, B2, and B3 for both cooling and heating are also installed with low-pressure connection pipes 46 through which the discharged refrigerant flows to the compressor 13.
  • the air conditioning system 100 may further include a pressure sensor for measuring the pressure of the refrigerant, a temperature sensor for measuring the temperature of the refrigerant, and a strainer for removing foreign substances present in the refrigerant flowing through the refrigerant pipe.
  • the outdoor device 10 when the outdoor device 10, the indoor device 20, and the hot water supply unit 30 act as condensers or evaporators according to operation modes, a separate refrigerant flow rate control device is not applied and it can be performed by opening the currently installed electronic expansion valve.
  • the optimum refrigerant flow rate control is possible by controlling each electronic expansion valve by determining the superheating degree or supercooling degree through a plurality of temperature sensors formed in each electronic expansion valve.
  • the temperature control of the hot water supply unit 30 is performed in a state where the amount of water cannot be controlled, and direct heat exchange is performed without a separate hydro kit, so that it is possible to determine whether two-phase refrigerant flows into the evaporator by determining the superheating degree of the discharged refrigerant. Therefore, it is possible to block the two-phase refrigerant by controlling the opening of the first hot water supply expansion valve 33 according to whether the two-phase refrigerant flows in.
  • the hybrid multi-air conditioning system 100 is capable of independent cooling operation, independent heating operation, cooling and hot water supply operation, heating and hot water supply operation, and independent hot water supply operation.
  • a heat exchanger operating as a condenser may be variously set according to the temperature of the water in the water tank 31 and the cooling load.
  • the outdoor heat exchanger 11 operates as a condenser.
  • the hot water supply heat exchanger 32 also operates as a condenser.
  • the outdoor heat exchanger 11 or the hot water supply heat exchanger 32 operating as a condenser may be selected according to each situation.
  • a hot water supply discharge pipe 36 having one side which is branched from the first hot water supply discharge pipe 35 connecting the hot water supply heat exchanger 32 and the indoor heat exchanger 21, and the other side which is joined to the first discharge pipe 43 connecting the compressor 13 and the outdoor heat exchanger 11, and a second hot water supply expansion valve 37 installed on the second hot water discharge pipe 36 are included.
  • the second hot water supply discharge pipe 36 may be branched from the first hot water supply discharge pipe 35 between the hot water supply heat exchanger 32 and the first hot water supply expansion valve 33 and may be joined to the first discharge pipe 43 between the four-way valve 14 and the outdoor heat exchanger 11.
  • a first temperature sensor 38 installed to detect the temperature of the water in the water tank 31 may be further included.
  • a second temperature sensor 47 installed at a rear end (discharge end) of the compressor 13 to measure the temperature of the refrigerant may be further included.
  • a first pressure sensor 48 installed at a rear end (discharge end) of the compressor 13 to measure the pressure of the refrigerant may be further included.
  • the condensation temperature can be predicted through the high-pressure information detected by the first pressure sensor 48.
  • FIG. 3 is an operation diagram illustrating the hybrid multi-air conditioning system of FIG. 2 during independent cooling operation.
  • the hot water supply valve 15 is blocked and the discharge valve 16 is opened. Then, the first hot water supply expansion valve 33 and the second hot water supply expansion valve 37 are blocked, and the outdoor expansion valve 17 and the indoor expansion valve 22 are opened.
  • indoor expansion valves 22 when a plurality of indoor expansion valves 22 are provided, only a portion of the indoor expansion valves 22 may be opened or the entire indoor expansion valve 22 may be opened according to the indoor environment.
  • the refrigerant which becomes a high-temperature and high-pressure gaseous phase after the compressor 13 operates, passes through the discharge valve 16 and then passes through the four-way valve 14 to be sent to the outdoor heat exchanger 11.
  • the condensed liquid refrigerant passes through the outdoor expansion valve 17, passes through the indoor expansion valve 22 of the indoor device 20 operating in a cooling operation at the first node n1 to be expanded, and then is transferred to the indoor heat exchanger 21 operating as the evaporator as a low-pressure refrigerant.
  • the low-pressure refrigerant After the low-pressure refrigerant enters the indoor device 20, the low-pressure refrigerant is evaporated through heat exchange with indoor air. Thus the indoor is cooled. Then, the low-temperature gaseous refrigerant discharged from the indoor heat exchanger 21 repeats the process of passing through the four-way valve 14 through the low-pressure connection pipe 46, flows into the input pipe 45 of the compressor 13, and being introduced into the compressor 13 again, and being re-discharged as a high-pressure, high-temperature gaseous refrigerant.
  • the outdoor expansion valve 17 is fully open, and the indoor expansion valve 22 can adjust the opening degree according to the target indoor temperature and the cooling load.
  • indoor cooling may proceed in a state where hot water supply is stopped.
  • FIG. 4 is an operation diagram illustrating the hybrid multi-air conditioning system of FIG. 2 during independent heating operation.
  • the hot water supply operation is stopped, and the outdoor heat exchanger 11 operates as an evaporator.
  • the indoor heat exchanger 21 operates as a condenser.
  • the hot water supply valve 15 is blocked and the discharge valve 16 is opened. Then, the first hot water supply expansion valve 33 and the second hot water supply expansion valve 37 are blocked, and the outdoor expansion valve 17 and the indoor expansion valve 22 are opened.
  • only some of the indoor expansion valves 22 may be opened according to the indoor environment, and all of the indoor expansion valves 22 may be opened.
  • the refrigerant which becomes a high-temperature and high-pressure gaseous phase after the compressor 13 operates, passes through the discharge valve 16 and then the passes through four-way valve 14 to be sent to the indoor heat exchanger 21.
  • the condensed high-pressure liquid refrigerant passes through the indoor expansion valve 22 and is sent to the side of the outdoor expansion valve 17 at the first node n1.
  • the low-temperature two-phase refrigerant passing through the outdoor expansion valve 17 is transferred to the outdoor heat exchanger 11 operating as an evaporator.
  • the low-temperature two-phase refrigerant introduced into the outdoor heat exchanger 11 exchanges heat with outdoor air and evaporates into a low-temperature gaseous refrigerant. Thereafter, the low-temperature gaseous refrigerant discharged from the outdoor heat exchanger 11 repeats the process of passing through the four-way valve 14, flows into the input pipe 45 of the compressor 13, and being introduced into the compressor 13 again, and being re-discharged as the high-pressure and high-temperature gaseous refrigerant.
  • the outdoor expansion valve 17 is fully open, and the indoor expansion valve 22 can adjust the opening degree thereof according to the target indoor temperature and heating load.
  • FIG. 5 is an operation diagram illustrating the hybrid multi-air conditioning system of FIG. 2 during independent operation of hot water supply.
  • the independent hot water supply operation is performed when only hot water supply is requested without cooling or heating.
  • the hot water supply valve 15 is opened and the discharge valve 16 is blocked.
  • the first hot water supply expansion valve 33 and the outdoor expansion valve 17 are opened, and the second hot water supply expansion valve 37 and the indoor expansion valve 22 are blocked.
  • the refrigerant that becomes a high-pressure gaseous phase after the compressor 13 operates is sent to the hot water supply heat exchanger 32 operating as a condenser through the second discharge pipe 42 and the hot water supply valve 15.
  • the high-temperature, high-pressure gaseous refrigerant sent to the hot water supply heat exchanger 32 exchanges heat with the water inside the water tank 31 to heat the water inside the water tank 31 and is condensed into a high-pressure liquid phase.
  • the condensed high-pressure liquid refrigerant passes through the first hot water supply expansion valve 33 and is transferred from the first node n1 to the outdoor expansion valve 17 side. Then, the refrigerant expanded into the low-temperature two-phase refrigerant in the outdoor expansion valve 17 repeats the process of passing through the outdoor heat exchanger 11 operating as an evaporator, passing through the four-way valve 14, and flowing into the input pipe 45 of the compressor 13, being introduced into the compressor 13 again, and being re-discharged as a high-pressure, high-temperature gaseous refrigerant.
  • FIG. 6 is an operation diagram illustrating the hybrid multi-air conditioning system of FIG. 2 during heating and hot water supply operation.
  • the outdoor heat exchanger 11 operates as an evaporator
  • the indoor heat exchanger 21 operates as a condenser
  • only some of the indoor expansion valves 22 may be opened according to the indoor environment, and all of the indoor expansion valves 22 may be opened.
  • a portion of the high-temperature and high-pressure gaseous refrigerant passes through the discharge valve 16 and then passes through the four-way valve 14 and is sent to the indoor heat exchanger 21, and the remaining portion passes through the hot water supply valve 15 and is sent to the hot water supply heat exchanger 32.
  • the high-pressure, high-temperature refrigerant sent to the outdoor heat exchanger 11 and the hot water supply heat exchanger 32 as described above, is condensed into a high-pressure liquid refrigerant while exchanging heat with the indoor air to heat the indoor, or exchanges heat with water inside the water tank 31 to heat the water inside the water tank 31 and is condensed into a high-pressure liquid refrigerant.
  • the condensed high-pressure liquid refrigerant passes through the indoor expansion valve 22 and the first hot water supply expansion valve 33, respectively, meets at the first node n1 and is transferred to the outdoor heat exchanger 11 through the outdoor expansion valve 17 of the outdoor device 10 which operates as an evaporator at the first node n1.
  • the refrigerant introduced into the outdoor heat exchanger 11 repeats the process of being evaporated by heat exchange with outdoor air, passing through the four-way valve 14 through the first discharge pipe 43, and then flowing to the input pipe 45 of the compressor 13, being introduced into the compressor 13 again, and being re-discharged as a high-pressure, high-temperature gaseous refrigerant.
  • the indoor expansion valve 22 may adjust the opening degree according to the target indoor temperature and the heating load.
  • FIG. 7 is an operation diagram illustrating the hybrid multi-air conditioning system of FIG. 2 during cooling and hot water supply operations.
  • the heat exchangers 11 and 32 of the outdoor device 10 and the hot water supply unit 30 operate as condensers, and the heat exchanger 21 of the indoor device 20 operates as an evaporator.
  • only some of the indoor expansion valves 22 may be opened according to the indoor environment, and all of the indoor expansion valves 22 may be open.
  • a portion of the refrigerant that has become a high-pressure gaseous phase after the compressor 13 operates passes through the discharge valve 16 and then passes through the four-way valve 14 and is sent to the outdoor heat exchanger 11, and the remaining part passes through the hot water supply valve 15 and is sent to the hot water supply heat exchanger 32.
  • the high-pressure, high-temperature refrigerant sent to the outdoor heat exchanger 11 and the hot water supply heat exchanger 32, as described above, is either condensed by heat exchange with outdoor air, or is condensed into a liquid phase by heat exchange with the water inside the water tank 31 to heat water inside the water tank 31.
  • the condensed liquid refrigerant passes through the outdoor expansion valve 17 and the first hot water supply expansion valve 33, respectively, meets at the first node n1, passes through the indoor expansion valve 22 of the indoor device 20 which operates in cooling mode at the first node n1, and thus is transferred to the indoor heat exchanger 21 as the low-pressure refrigerant.
  • the low-pressure refrigerant evaporates by exchanging heat with indoor air, passes through the four-way valve 14 through the low-pressure connection pipe 46 while cooling the indoor air, and enters the input pipe 45 of the compressor 13 and is introduced into the compressor 13 again.
  • the hot water supply and cooling operation mode through at least one information of the water temperature detected by the first temperature sensor 38, the refrigerant discharge temperature detected by the second temperature sensor 47, and the discharge pressure and the condensation temperature detected by the first pressure sensor 48, it is possible to select the outdoor heat exchanger 11 or the hot water supply heat exchanger 32.
  • the outdoor heat exchanger 11 or the hot water supply heat exchanger 32 to be used as the condenser can be selected through the operating frequency (Hz) of the compressor 13.
  • hot water supply heat exchanger 32 may singly operate as a condenser.
  • both the outdoor heat exchanger 11 and the hot water supply heat exchanger 32 may operate as condensers.
  • the hot water supply valve 15 is blocked and the discharge valve 16 is opened, similarly to the independent cooling operation. Then, the first hot water supply expansion valve 33 and the second hot water supply expansion valve 37 are blocked, and the outdoor expansion valve 17 and the indoor expansion valve 22 are opened.
  • the refrigerant which has become a high-pressure gaseous phase after the compressor 13 operates, passes through the discharge valve 16 and then passing through the four-way valve 14 to be sent to the outdoor heat exchanger 11.
  • the condensed liquid refrigerant passes through the outdoor expansion valve 17 and passes through the indoor expansion valve 22 of the indoor device 20 performing a cooling operation at the first node n1 and then is transferred to the indoor heat exchanger 21 as the low-pressure refrigerant.
  • the low-pressure refrigerant repeats a process of evaporating by exchanging heat with indoor air, passing through the four-way valve 14 through the low-pressure connection pipe 46 while cooling the indoor air, and flowing into the input pipe 45 of the compressor 13, being introduced into the compressor 13 again, and being re-discharged as a high-pressure, high-temperature gaseous refrigerant.
  • FIG. 8 is an operation diagram illustrating a state where only the hot water supply heat exchanger operates as a condenser during cooling and hot water supply operations of the hybrid multi-air conditioning system of FIG. 2 .
  • the hot water supply valve 15 is opened and the discharge valve 16 is blocked.
  • the first hot water supply expansion valve 33 and the indoor expansion valve 22 are opened, the second hot water supply expansion valve 33 and the outdoor expansion valve 17 are blocked, and only the hot water supply heat exchanger 32 operates as a condenser.
  • only some of the indoor expansion valves 22 may be opened according to the indoor environment, and all of the indoor expansion valves 22 may be opened.
  • the refrigerant which has become a high-pressure gas phase after the compressor 13 operates, is sent to the hot water supply heat exchanger 32 operating as a condenser through the second discharge pipe 42 and the hot water supply valve 15.
  • the high-temperature, high-pressure gaseous refrigerant sent to the hot water supply heat exchanger 32 exchanges heat with the water inside the water tank 31 to heat the water inside the water tank 31 and is condensed into a high-pressure liquid phase.
  • the condensed high-pressure liquid refrigerant passes through the second hot water supply expansion valve 37 and is transferred from the first node n1 to the indoor expansion valve 22 side. Then, the refrigerant that has passed through the indoor expansion valve 22 repeats the process of passing through the indoor heat exchanger 11, passing through the four-way valve 14, flowing into the input pipe 45 of the compressor 13, being introduced into the compressor 13, again, and being re-discharged as a high-pressure, high-temperature gaseous refrigerant.
  • only hot water supply operation may be performed singly.
  • only the hot water supply heat exchanger 32 can operate as a condenser.
  • FIG. 9 is a configuration diagram illustrating a hybrid multi-air conditioning system according to another embodiment of the present disclosure of FIG. 1 .
  • the hybrid multi-air conditioning system includes a controller 50.
  • the controller 50 may receive values measured from the first temperature sensor 38, the second temperature sensor 47, and the first pressure sensor 48.
  • the controller 50 may receive the water temperature measured by the first temperature sensor 38, the discharge temperature measured by the second temperature sensor 47, the discharge pressure measured by the first pressure sensor 48, or condensation temperature value according to this.
  • the controller 50 can calculate the discharge superheating degree based on the discharge temperature measured by the second temperature sensor 47, the discharge pressure measured by the first pressure sensor 48, or the condensation temperature value according to this.
  • controller 50 may receive operation frequency (Hz) information of the compressor.
  • controller 50 can open and close a hot water supply valve 15, a discharge valve 16, a first hot water supply expansion valve 33, a second hot water supply expansion valve 37, an outdoor expansion valve 17, and an indoor expansion valve 22 or can adjust the opening degree thereof.
  • controller 50 may adjust the open position of the four-way valve 14, and may adjust whether or not the respective fans 12 and 23 operate and the number of revolutions per unit time.
  • controller 50 may control whether or not the heater 60 to be described later operates and the output thereof.
  • controller 50 may control the operating frequency (Hz) and capacity of the compressor 13.
  • the hot water supply and cooling operation mode when the temperature of the water accommodated in the water tank 31 is a preset reference temperature or less and the cooling load is lower than the preset reference value, it is a situation where a refrigerant cycle for cooling is unnecessary, and only a refrigerant cycle for hot water supply is required. Accordingly, it is controlled so that the first hot water supply expansion valve 33 is opened and the second hot water supply expansion valve 37 is blocked.
  • the hot water supply and cooling operation mode when the temperature of the water accommodated in the water tank 31 is the preset reference temperature or less and the cooling load is lower than the preset reference value, it is a situation where a refrigerant cycle for cooling is unnecessary, and only a refrigerant cycle for hot water supply is required. Therefore, only the hot water supply heat exchanger 32 is controlled to operate as a condenser.
  • the refrigerant flows as illustrated in FIG. 8 .
  • the hot water supply valve 15 is opened and the discharge valve 16 is blocked.
  • the first hot water supply expansion valve 33 and the indoor expansion valve 22 are opened, the second hot water supply expansion valve 33 and the outdoor expansion valve 17 are blocked, and only the hot water supply heat exchanger 32 operates as a condenser.
  • the hot water supply and cooling operation mode when the temperature of the water accommodated in the water tank 31 is a preset reference temperature or less and the cooling load is higher than a preset reference value, it is a situation where a refrigerant cycle for cooling is also required, and a refrigerant cycle for hot water supply is also required. Accordingly, it is controlled so that the second hot water supply expansion valve 37 is opened and the first hot water supply expansion valve 33 is blocked.
  • both the hot water supply heat exchanger 32 and the outdoor heat exchanger 11 are controlled to operate as condensers.
  • the refrigerant flows as illustrated in FIG. 7 .
  • the hot water supply valve 15 is opened and the discharge valve 16 is blocked. Then, the second hot water supply expansion valve 37, the outdoor expansion valve 17, and the indoor expansion valve 22 are opened, and the first hot water supply expansion valve 33 is blocked, so that the heat exchangers 11 and 32 of the outdoor device 10 and the hot water supply unit 30 operate as condensers, and the heat exchanger 21 of the indoor device 20 operates as an evaporator.
  • the hot water supply and cooling operation mode when the temperature of the water accommodated in the water tank 31 is a preset reference temperature or less and the cooling load is higher than the preset reference value, a refrigerant cycle for cooling is required, and although the refrigerant cycle for the hot water supply is selectively required, it is controlled so that the second hot water supply expansion valve 37 is opened and the first hot water supply expansion valve 33 is blocked.
  • the hot water supply and cooling operation mode when the temperature of the water accommodated in the water tank 31 is the preset reference temperature or more and the cooling load is higher than the preset reference value, a refrigerant cycle for cooling is required, and although the refrigerant cycle for the hot water supply is selectively required, it is controlled so that both the hot water supply heat exchanger 32 and the outdoor heat exchanger 11 are operated as condensers.
  • the hot water supply and cooling operation mode even if the temperature of the water accommodated in the water tank 31 is the preset reference temperature or more and the cooling load is higher than the preset reference value, it is controlled so that, according to the discharge superheating degree of the compressor 13, the first hot water supply expansion valve 33 may be opened or the second hot water supply expansion valve 37 may be opened.
  • the hot water supply and cooling operation mode even if the temperature of the water accommodated in the water tank 31 is the preset reference temperature or more and the cooling load is higher than the preset reference value, when the discharge superheating degree of the compressor 13 is smaller than the preset reference superheat, as illustrated in Figure 8 , it can be controlled so that only the hot water supply heat exchanger 31 singly operates as a condenser.
  • the hot water supply valve 15 is opened and the discharge valve 16 is blocked.
  • the first hot water supply expansion valve 33 and the indoor expansion valve 22 are opened, the second hot water supply expansion valve 33 and the outdoor expansion valve 17 are blocked, and thus it can be controlled so that only the hot water supply heat exchanger 32 operates as a condenser.
  • the temperature of the water accommodated in the water tank 31 is a preset reference temperature or more and the cooling load is lower than a preset reference value, it can be controlled so that only the outdoor heat exchanger 11 operates as a condenser.
  • only the outdoor heat exchanger 11 may singly operate as a condenser so that the hot water supply operation is stopped and the independent cooling operation is performed.
  • the hot water supply valve 15 is blocked and the discharge valve 16 is opened. Then, the first hot water supply expansion valve 33 and the second hot water supply expansion valve 37 are blocked, and the outdoor expansion valve 17 and the indoor expansion valve 22 are opened.
  • the water tank 31 can be heated with a separately provided heater 60 instead the refrigerant cycle.
  • a heat exchanger operating as a condenser In the hot water supply and cooling operation mode, a heat exchanger operating as a condenser according to each situation is referred to Table 1 below.
  • Table 1 case Water Temperature Cooling Load Condenser 1 Reference Temperature or less Reference Value or less Hot Water Supply Heat Exchanger 2 Reference Temperature or less Exceeding Reference Value Hot Water Supply Heat Exchanger and Outdoor Heat Exchanger 3 Exceeding Reference Temperature Exceeding Reference Value (Exceeding Discharge Super heating Degree Reference) Hot Water Supply Heat Exchanger and Outdoor Heat Exchanger 4 Exceeding Reference Temperature Exceeding Reference Value (Discharge Super heating Degree Reference or Hot Water Supply Heat Exchanger less) 5 Exceeding Reference Temperature Reference Value or less Outdoor Heat Exchanger
  • FIG. 10 is a flowchart illustrating a method for controlling a hybrid multi-air conditioning system according to another embodiment of the present disclosure.
  • the hybrid multi-air conditioning system according to the present disclosure may use the hot water supply heat exchanger 32 or the outdoor heat exchanger 11 as an independent condenser or may use the hot water supply heat exchanger 32 and the outdoor heat exchanger 11 disposed in series together as a condenser.
  • a heat exchanger to operate as a condenser may be selected by measuring discharge temperature, condensation temperature, and water temperature through a temperature sensor, a pressure sensor, and the like, and reflecting the operating frequency Hz of the compressor.
  • the compressor configures the evaporation temperature according to the required cooling load, and the condensation temperature is relatively low when the cooling load is low, it is difficult to secure discharge superheating degree capable of supplying hot water. This acts as a worse condition as the area of the condenser increases.
  • the condensation temperature can be further increased and the waste heat recovery rate is higher than when the hot water supply heat exchanger 32 and the outdoor heat exchanger 11 are used together as the condenser.
  • the cooling load is large, it is necessary to increase the size of the condenser because the required condensing capacity also increases, and in this case, the hot water supply heat exchanger 32 and the outdoor heat exchanger 11 are used together as the condenser.
  • the water temperature in the water tank 31 is relatively higher than the outdoor temperature and the target water temperature is also generally 50 to 60 °C, a series structure in which the water tank 31 is mainly heated by the discharge superheating degree is used.
  • the hot water supply heat exchanger 32 and the outdoor heat exchanger 11 are used together as a condenser.
  • the hybrid multi-air conditioning system selects the heat exchangers 11 and 32 to be used as condensers by calculating the discharge superheating degree with the compressor discharge temperature and condensation temperature during cooling and hot water supply operation and reflecting the information of the calculated discharge superheating degree, the water temperature inside the water tank, and the operating frequency Hz of the compressor
  • the cooling load is determined by comparing the operating frequency of the compressor with a reference value (S11).
  • the operating frequency of the compressor 13 is less than 30 Hz, it may be determined that the cooling load is low, and conversely, if the operating frequency of the compressor 13 is 30 Hz or more, it may be determined that the cooling load is high.
  • step S11 if the operating frequency of the compressor 13 is less than 30 Hz, it is determined that the cooling load is low, and the temperature of the water in the water tank 31 is detected. (S12)
  • step S12 if the water temperature in the water tank 31 is less than the reference temperature, the water temperature in the water tank 31 is low in a low cooling load situation, so the hot water supply heat exchanger 32 is singly used as a condenser. (S15)
  • the hot water supply heat exchanger 32 is singly used alone as a condenser.
  • the hot water supply valve 15 is opened and the discharge valve 16 is closed.
  • the first hot water supply expansion valve 33 and the indoor expansion valve 22 are opened, the second hot water supply expansion valve 33 and the outdoor expansion valve 17 are closed, and only the hot water supply heat exchanger 32 operates as a condenser.
  • step S12 if the water temperature of the water tank 31 is the reference temperature or more, since the water temperature in the water tank 31 is high in the case of low cooling load, only the outdoor heat exchanger 11 can be controlled to operate as a condenser (S14).
  • the outdoor heat exchanger 11 alone may operate as a condenser so that the hot water supply operation is stopped and the independent cooling operation is performed.
  • the hot water supply valve 15 is blocked and the discharge valve 16 is opened. Then, the first hot water supply expansion valve 33 and the second hot water supply expansion valve 37 are blocked, and the outdoor expansion valve 17 and the indoor expansion valve 22 are opened.
  • the water tank 31 is heated by a separately provided heater 60, not by a refrigerant cycle.
  • the hot water supply heat exchanger 32 when used as a condenser in a situation where the cooling load is low and the water temperature in the water tank 31 is the reference temperature or more, it may be difficult to form a normal cycle while reaching the condensation temperature increase limit.
  • the cooling load is low and the water temperature in the water tank 31 is the reference temperature or more, it is switched to the single cooling mode, and only the outdoor heat exchanger 11 is singly used as a condenser, and in the case of the water tank 31, hot water is supplied using a separate heater attached to the inside.
  • step S11 if the operating frequency of the compressor 13 is 30 Hz or more, it is determined that the cooling load is high, and the discharge temperature of the compressor and the condensation temperature information are used to calculate the discharge superheating degree. (S13)
  • step S13 if the discharge superheating degree is less than the reference temperature, the process proceeds to the step S12.
  • step S12 if the temperature of the water in the water tank 31 is less than the reference temperature, the temperature of the water in the water tank 31 is low in the cooling low load situation, so the hot water supply heat exchanger 32 is used singly as a condenser. (S15)
  • step S12 if the water temperature of the water tank 31 is the reference temperature or more, only the outdoor heat exchanger 11 can be controlled to operate as a condenser (S14).
  • step S13 if the discharge superheating degree is the reference temperature or more, the hot water supply heat exchanger 32 and the outdoor heat exchanger 11 are used as condensers together (S16).
  • the hot water supply valve 15 is opened and the discharge valve 16 is closed. Then, the first hot water supply expansion valve 33 is blocked, and the first hot water supply expansion valve 33, the outdoor expansion valve 17, and the indoor expansion valve 22 are opened.
  • both the hot water supply heat exchanger 32 and the outdoor heat exchanger 11 are used as condensers.
  • the hot water supply heat exchanger 32 is operated singly through valve control use as a condenser.
  • the outdoor heat exchanger (11) is used alone as a condenser, and the water in the water tank (31) is heated with a separate heater because the risk of high pressure limitation is high at the cooling load of 30 Hz or higher.
  • the hot water supply heat exchanger 32 and the outdoor heat exchanger 11 are continuously used as condensers.
  • values of the operating frequency of the compressor, which is the standard for determining the cooling load, the water temperature which is the standard, and the value of the discharge superheating degree which is the standard may be changed according to circumstances.
  • the condensation temperature is lowered to increase the cooling performance and the efficiency of hot water supply, and thus it is advantageous to prevent damage to the compressor, and there is an advantage in that the waste heat recovery rate and efficiency of hot water supply can increase under low load conditions or low water temperature in the water tank.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Signal Processing (AREA)
  • Fuzzy Systems (AREA)
  • Mathematical Physics (AREA)
  • Heat-Pump Type And Storage Water Heaters (AREA)
  • Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
EP23186282.2A 2022-07-22 2023-07-19 Système de climatisation multiple hybride Pending EP4310416A1 (fr)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20100023877A (ko) 2007-06-27 2010-03-04 다이킨 고교 가부시키가이샤 히트 펌프식 급탕 장치
US20160116191A1 (en) * 2013-05-24 2016-04-28 Mitsubishi Electric Corporation Refrigeration cycle device
EP3859238A1 (fr) * 2018-09-26 2021-08-04 Hitachi-Johnson Controls Air Conditioning, Inc. Dispositif de climatisation et d'alimentation en eau chaude
US20220042725A1 (en) * 2020-08-04 2022-02-10 Mitsubishi Electric Us, Inc. Refrigeration cycle device and method of operating refrigeration cycle device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20100023877A (ko) 2007-06-27 2010-03-04 다이킨 고교 가부시키가이샤 히트 펌프식 급탕 장치
US20160116191A1 (en) * 2013-05-24 2016-04-28 Mitsubishi Electric Corporation Refrigeration cycle device
EP3859238A1 (fr) * 2018-09-26 2021-08-04 Hitachi-Johnson Controls Air Conditioning, Inc. Dispositif de climatisation et d'alimentation en eau chaude
US20220042725A1 (en) * 2020-08-04 2022-02-10 Mitsubishi Electric Us, Inc. Refrigeration cycle device and method of operating refrigeration cycle device

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