EP2503266A1 - Kältekreislaufvorrichtung und daran adaptierte informationsverbreitungsverfahren - Google Patents

Kältekreislaufvorrichtung und daran adaptierte informationsverbreitungsverfahren Download PDF

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Publication number
EP2503266A1
EP2503266A1 EP09851418A EP09851418A EP2503266A1 EP 2503266 A1 EP2503266 A1 EP 2503266A1 EP 09851418 A EP09851418 A EP 09851418A EP 09851418 A EP09851418 A EP 09851418A EP 2503266 A1 EP2503266 A1 EP 2503266A1
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EP
European Patent Office
Prior art keywords
hot
refrigerant
water supply
unit
refrigeration cycle
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.)
Granted
Application number
EP09851418A
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English (en)
French (fr)
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EP2503266A4 (de
EP2503266B1 (de
Inventor
Kenji Matui
Shigeo Takata
Hironori Yabuuchi
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Mitsubishi Electric Corp
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Mitsubishi Electric Corp
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Publication date
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Publication of EP2503266A1 publication Critical patent/EP2503266A1/de
Publication of EP2503266A4 publication Critical patent/EP2503266A4/de
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Publication of EP2503266B1 publication Critical patent/EP2503266B1/de
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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
    • 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
    • F25B7/00—Compression machines, plants or systems, with cascade operation, i.e. with two or more circuits, the heat from the condenser of one circuit being absorbed by the evaporator of the next circuit
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • 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
    • F25B2313/027—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means
    • F25B2313/0272—Compression machines, plants or systems with reversible cycle not otherwise provided for characterised by the reversing means using bridge circuits of one-way 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
    • F25B2313/027—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
    • 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
    • F25B2500/00—Problems to be solved
    • F25B2500/19—Calculation of parameters

Definitions

  • the refrigeration cycle apparatus 100 is constituted by a refrigeration cycle for air conditioning 1, a refrigeration cycle for hot-water supply 2, and a hot-water supply device 3, and is configured such that the refrigeration cycle for air conditioning 1 and the refrigeration cycle for hot-water supply 2 exchange heat in a refrigerant-to-refrigerant heat exchanger 41 and the refrigeration cycle for hot-water supply 2 and the hot-water supply device 3 exchange heat in a heat medium-to-refrigerant heat exchanger 51 without each of the refrigerants and water being mixed.
  • the refrigeration cycle apparatus 100 further has mounted therein a hot-water supply unit F.
  • the air conditioning expansion devices 117 function as pressure reducing valves and expansion valves, and are configured to reduce the pressure of the air conditioning refrigerant to cause the air conditioning refrigerant to expand.
  • Each of the air conditioning expansion devices 117 may be constituted by a mechanism whose opening degree is variably controllable, such as a precise flow rate control device based on an electronic expansion valve or an inexpensive refrigerant flow rate regulating device such as a capillary tube.
  • the indoor heat exchangers 118 function as radiators (condensers) or evaporators, and are configured to exchange heat between air supplied from the fan or the like (not illustrated) and the air conditioning refrigerant to evaporate and gasify the air conditioning refrigerant or condense and liquefy the air conditioning refrigerant.
  • the air conditioning expansion devices 117 and the indoor heat exchangers 118 are connected in series.
  • the air conditioning compressor 101 may be of any type capable of compressing a sucked refrigerant into a high-pressure state, and the type thereof is not particularly limited.
  • the air conditioning compressor 101 may be of any of various types such as reciprocating, rotary, scroll, and screw types.
  • the air conditioning compressor 101 may also be of a type whose rotation speed is variably controllable by an inverter, or of a type whose rotation speed is fixed.
  • the air conditioning refrigerant passing through the second junction unit 116 is distributed to circuits in which the valve means 109b are open.
  • the air conditioning refrigerant passing through the second junction unit 116 flows into the indoor unit B, and is caused to expand into low-temperature low-pressure refrigerants by the air conditioning expansion devices 117.
  • the low-temperature low-pressure refrigerants evaporate in the indoor heat exchangers 118, traveling through the valve means 109b, and merge in the low-pressure-side connection pipe 107.
  • the refrigeration cycle for hot-water supply 2 is constituted by a hot-water supply compressor 21, the heat medium-to-refrigerant heat exchanger 51, a hot-water supply expansion device 22, and the refrigerant-to-refrigerant heat exchanger 41. That is, the refrigeration cycle for hot-water supply 2 constitutes a second refrigerant circuit in which the hot-water supply compressor 21, the heat medium-to-refrigerant heat exchanger 51, the hot-water supply expansion device 22, and the refrigerant-to-refrigerant heat exchanger 41 are connected in series by a refrigerant pipe 45, and is established by circulating the hot-water supply refrigerant in the second refrigerant circuit.
  • the heat medium-to-refrigerant heat exchanger 51 is configured to exchange heat between the heat medium (fluid such as water) circulating in the hot-water supply device 3 and the hot-water supply refrigerant circulating in the refrigeration cycle for hot-water supply 2. That is, the refrigeration cycle for hot-water supply 2 and the hot-water supply device 3 are cascade-connected via the heat medium-to-refrigerant heat exchanger 51.
  • the hot-water supply expansion device 22 functions as a pressure reducing valve and an expansion valve, and is configured to reduce the pressure of the hot-water supply refrigerant to cause the hot-water supply refrigerant to expand.
  • the hot-water supply refrigerant is expanded by the hot-water supply expansion device 22 until its temperature has dropped to less than or equal to the outlet temperature of the refrigerant-to-refrigerant heat exchanger 41 in the heat source circuit for hot-water supply D of the refrigeration cycle for air conditioning 1.
  • the expanded hot-water supply refrigerant receives heat from the air conditioning refrigerant flowing in the heat source circuit for hot-water supply D included in the refrigeration cycle for air conditioning 1, evaporates in the refrigerant-to-refrigerant heat exchanger 41, and returns to the hot-water supply compressor 21.
  • the water circulation pump 31 is configured to suck in the water stored in the hot-water storage tank 32, pressurize the water, and circulate the water in the hot-water supply device 3.
  • the water circulation pump 31 may be of a type whose rotation speed is controlled by an inverter, by way of example.
  • the heat medium-to-refrigerant heat exchanger 51 is configured to exchange heat between the heat medium (fluid such as water) circulating in the hot-water supply device 3 and the hot-water supply refrigerant circulating in the refrigeration cycle for hot-water supply 2.
  • the hot-water storage tank 32 is configured to store the water heated by the heat medium-to-refrigerant heat exchanger 51.
  • comparatively low temperature water stored in the hot-water storage tank 32 is drawn out of the bottom of the hot-water storage tank 32 and is pressurized by the water circulation pump 31.
  • the water pressurized by the water circulation pump 31 flows into the heat medium-to-refrigerant heat exchanger 51, and receives heat in the heat medium-to-refrigerant heat exchanger 51 from the hot-water supply refrigerant circulating in the refrigeration cycle for hot-water supply 2. That is, the water flowing into the heat medium-to-refrigerant heat exchanger 51 is boiled by the hot-water supply refrigerant circulating in the refrigeration cycle for hot-water supply 2, and its temperature rises. The boiled water returns to a comparatively high temperature upper portion of the hot-water storage tank 32, and is stored in the hot-water storage tank 32.
  • the refrigeration cycle for air conditioning 1 and the refrigeration cycle for hot-water supply 2 have independent refrigerant circuit configurations (the first refrigerant circuit constituting the refrigeration cycle for air conditioning 1 and the second refrigerant circuit constituting the refrigeration cycle for hot-water supply 2).
  • the refrigerants to be circulated in the respective refrigerant circuits may be of the same type or of different types. That is, the refrigerants in the respective refrigerant circuits flow so as to exchange heat in the refrigerant-to-refrigerant heat exchanger 41 and the heat medium-to-refrigerant heat exchanger 51 without being mixed.
  • the invention is not limited to this, and the accumulator 104 may be omitted if excessive refrigerant is stored in a heat exchanger serving as a radiator in a refrigeration cycle.
  • the number of indoor units to be connected is not particularly limited, and, for example, one or more indoor units B and no indoor unit C or one or more indoor units C may be connected.
  • the capacities of indoor units included in the refrigeration cycle for air conditioning 1 may be the same or different from high to low.
  • the hot water load system uses a binary cycle.
  • a demand for high-temperature hot-water supply for example, 80 degrees C
  • it is only required to set the temperature of the radiator of the refrigeration cycle for hot-water supply 2 to a high temperature for example, a condensing temperature of 85 degrees C.
  • a high temperature for example, a condensing temperature of 85 degrees C.
  • the condensing temperature for example, 50 degrees C
  • energy saving is achieved.
  • a demand for high-temperature hot-water supply during the air conditioning cooling operation in the summer would conventionally need to be provided through a boiler or the like. Because hot-water supply is performed through collection and reuse of heating energy, which has been conventionally released in the air, the system COP is significantly increased, leading to energy saving.
  • Fig. 2 is a schematic configuration diagram for explaining information transfer in the refrigeration cycle apparatus 100 according to an embodiment of the present invention. The information transfer performed by the refrigeration cycle apparatus 100 will be described with reference to Figs. 1 and 2 .
  • the refrigeration cycle apparatus 100 in which two indoor units (an indoor unit B and an indoor unit C) and two hot-water supply units F (a hot-water supply unit F1 and a hot-water supply unit F2) are connected to one heat source unit A is illustrated by way of example.
  • the heat source unit controller 61 and the relay unit controller 62 are connected to each other via a transmission line 7 so that information can be transferred between them.
  • the relay unit controller 62 and the indoor unit controllers 63 are connected to each other via a transmission line 8 so that information can be transferred between them.
  • the relay unit controller 62 and the hot-water supply unit controllers 64 are connected to each other via the transmission line 8 so that information can be transferred between them.
  • the indoor unit controllers 63 and the hot-water supply unit controllers 64 are connected to remote controllers 65 via transmission lines 9 so that information can be transferred between the indoor unit controllers 63 and the associated remote controllers 65 and between the hot-water supply unit controllers 64 and the associated remote controllers 65.
  • the hot-water storage tank 32 is provided with a water supply valve 33 disposed at a water inlet (illustration omitted), a water discharge valve 34 disposed at a water outlet (illustration omitted), a water temperature sensor 35 that detects the temperature of water, hot water, or the like stored in the hot-water storage tank 32, and a water level sensor 36 that detects the amount (water level) of water, hot water, or the like stored in the hot-water storage tank 32.
  • a user operates the associated remote controller 65 and sets a set temperature of the hot-water supply unit F1.
  • the user can set a binary set temperature.
  • the term binary set temperature refers to a hot-water supply temperature (first set temperature) required for the hot-water supply unit F1 and a temperature (second set temperature) when the hot-water supply unit F1 automatically operates for the purpose of energy saving or continuation of stable operation of the overall system.
  • the second set temperature is set to a value higher than the first set temperature. For example, the user sets 55 degrees C as the first set temperature and 60 degrees C as the second set temperature.
  • the remote controller 65 When a set temperature is input, the remote controller 65 saves the set binary set temperature in a memory, and transmits the set binary set temperature to the associated hot-water supply unit controller 64 via the transmission line 9.
  • the hot-water supply unit controller 64 Upon receipt of the set binary set temperature, the hot-water supply unit controller 64 saves the received binary set temperature in a memory, and transmits the binary set temperature to the relay unit controller 62 via the transmission line 8.
  • the binary set temperature is further transmitted to the centralized controller 66 through the transmission line 8, the transmission line 7, and the transmission line 10.
  • the relay unit controller 62 that has received the binary set temperature also transmits the binary set temperature of each hot-water supply unit F to the heat source unit controller 61 via the transmission line 7.
  • the user When the user do not wish to cause the hot-water supply unit F to automatically operate, they may not set the second set temperature.
  • the user It will also be possible for the user to set the binary set temperature by manipulating the centralized controller 66. In this case, the centralized controller 66 saves a set binary set temperature in a memory, and transmits the set binary set temperature to the associated hot-water supply unit controller 64 through the transmission line 10, the transmission line 7, and the transmission line 8.
  • the hot-water supply unit controller 64 Upon receipt of the set binary set temperature, the hot-water supply unit controller 64 transmits the received binary set temperature to the relay unit controller 62 via the transmission line 8, and also transmits the binary set temperature to the associated remote controller 65 through the transmission line 9.
  • the above communication allows the heat source unit controller 61 to keep information about all the hot-water supply units F connected to the refrigerant circuit as to whether or not automatic operation is possible.
  • the heat source unit controller 61 analyses the operating capacity, the load state, the system COP, and the like from various kinds of data, such as the operating/stopping state, pressure, temperature, compressor operating frequency, current, and the like of all the units connected to the refrigerant circuit, such as the indoor units B, the indoor units C, and the hot-water supply units F (step S103).
  • the balance of the cooling load, heating load, and the hot water load are determined from the total capacity of an indoor unit B and an indoor unit C with the cooling thermo-on, the total capacity of an indoor unit B and an indoor unit C with the heating thermo-on, and the total capacity of hot-water supply units F with the thermo-on.
  • the heat source unit controller 61 determines whether or not the operating condition can be improved by operating or stopping an automatically operable hot-water supply unit F (step S104). For example, when the cooling load is larger than the heating and hot water loads, if the difference between the cooling load and the heating and hot water loads can be reduced by operating an automatically operable hot-water supply unit F, then it can be determined that the system COP will be increased by allowing the hot-water supply unit F to operate.
  • the motor efficiency of the air conditioning compressor 101 when in the state of the small-capacity heating operation, it can be determined that the motor efficiency of the air conditioning compressor 101 will be improved by allowing an automatically operable hot-water supply unit F to operate, which results in energy saving operation.
  • the number of indoor units C that perform heating operation is increased by manipulation of an user operation and when the heating load becomes large, then, it can be determined that power consumption can be reduced by stopping the hot-water supply unit F that has been allowed to automatically operate.
  • the high-pressure-side pressure can be reduced by operating an automatically operable hot-water supply unit F and that stable operation can be continued. After that, if the high-pressure-side pressure is sufficiently reduced by, for example, change of the number of units operated, it can be determined that power consumption can be reduced by stopping the hot-water supply unit F that has been allowed to automatically operate.
  • the hot-water supply units F to be changed are determined in accordance with a preset priority.
  • the priority may be manually set in advance.
  • the priority may be set in accordance with the intended use such as for a guest room in a hotel, a room for employees, and the like.
  • Another method is also possible in which the priority is set in accordance with the addresses of the hot-water supply unit controllers 64. In this case, the method is made feasible by setting the values of the addresses in ascending order or descending order in accordance with the priority.
  • the priority is determined in accordance with the integrated operating time of each hot-water supply unit F.
  • a hot-water supply unit F with a short integrated operating time is operated with priority to make the integrated operating times uniform, thereby making it possible to avoid the problem of shortening the product life of only a specific hot-water supply unit F.
  • the priority is set in accordance with the value of the difference between the water temperature in the hot-water storage tank 32 of each hot-water supply unit F and a set temperature. In this method, a hot-water supply unit F having a large temperature difference is preferentially operated, thereby enabling continuous operation for a long time.
  • the heat source unit controller 61 transmits information of the hot-water supply unit or units F to be operated and stopped to the relay unit controller 62 (step S105). After the completion of the transmission process, the heat source unit controller 61 performs normal processes such as receiving a sensor input and controlling the actuators (step S106). Meanwhile, also when it is determined that automatic operation is not possible (step S102; N) or when it is determined that the operating condition cannot be improved by operating and stopping an automatically operable hot-water supply unit F (step S104; N), the heat source unit controller 61 performs the normal processes (step S106).
  • the hot-water supply unit controller 64 Upon receipt of an automatic operation/stopping command from the relay unit controller 62, the hot-water supply unit controller 64 changes the operating condition in accordance with the command, and transmits notification of the change of the operating condition to the associated remote controller 65 and the centralized controller 66.
  • the hot-water supply unit controller 64 Upon receipt of a normal operation or stopping command from the remote controller 65 or the centralized controller 66, the hot-water supply unit controller 64 changes the operating condition in accordance with the command, and transmits the change of the operating condition to the relay unit controller 62.
  • the hot-water supply unit controller 64 further identifies the operating condition of the associated hot-water supply unit F as that in normal operation or automatic operation, and holds the operating condition. Further, the hot-water supply unit controller 64 also transmits information of the identified operating conditions of the remote controllers 65 and the centralized controller 66 to the remote controllers 65 and the centralized controller 66.
  • the hot-water supply unit controller 64 operates in order to allow the water temperature to reach the first set temperature, and the hot-water supply unit controller 64 turns off the thermostat when the water temperature has reached the first set temperature. In automatic operation, however, the hot-water supply unit controller 64 maintains the on-state of the thermostat until the water temperature has reached the second set temperature. This is because the hot-water supply unit F is made to be able to continue its operation for a long time for the purpose of energy saving or continuation of stable operation of the overall system.
  • the water supply valve 33 is opened to supply the hot-water storage tank 32 with cold water to reduce the water temperature, and the operation is continued.
  • a remote controller 65 and the centralized controller 66 Upon receipt of notification of a change of the automatic operation/stopping condition from the associated hot-water supply unit controller 64, the remote controller 65 and the centralized controller 66 recognize the information, and reflect the information on display. In this case, also regarding display, the normal operation and the automatic operation may be displayed in a distinguishable manner. The purpose is to allow the user to recognize that the automatic operation is in progress and to prevent the user from mistakenly thinking that some other event is in progress such as forgetting to turn off the associated hot-water supply unit F using a remote control (remote controller 65). Additionally, when the associated hot-water supply unit F is operated or stopped by a user, the remote controller 65 and the centralized controller 66 recognize information, reflect the information on display, and transmit the information to the associated hot-water supply unit controller 64.
  • each of the indoor unit controllers 63 can include a means for operating a hot-water supply unit F.
  • control can be performed using a simple algorithm such as operating and stopping a hot-water supply unit F in association with operating and stopping of the indoor unit B and the indoor unit C.
  • a means for operating a hot-water supply unit F can also be provided in the hot-water supply unit controller 64 itself.
  • the advantage of this system is that, due to the autonomous control, the hot-water supply unit F can contribute to energy saving while reducing changes in water temperature.
  • the refrigeration cycle apparatus 100 when the cooling load is larger than the heating load and the hot water load, the refrigeration cycle apparatus 100 operates the hot-water supply device, thereby increasing the system COP and enabling a reduction in running cost while achieving energy saving. Also, the refrigeration cycle apparatus 100 operates the hot-water supply device during the small-capacity heating operation, thereby improving the motor efficiency of the air conditioning compressor 101 and enabling a reduction in running cost while further achieving energy saving. Additionally, the refrigeration cycle apparatus 100 causes the hot-water supply device to operate in the case of the small-capacity overloaded heating operation, thereby reducing the high-pressure-side pressure and allowing for continuation of stable operation.
  • the refrigeration cycle apparatus 100 in which the secondary refrigerant (hot water) of a hot-water supply unit F is used as a heat storing heat medium has been described by way of example.
  • the configuration of the refrigeration cycle apparatus 100 is not limited to this.
  • an air-conditioning apparatus illustrated in Fig. 5 (of the type in which heat is transferred from a direct expansion air conditioner to another secondary refrigerant) can also be used in a similar manner.
  • a case where a hot-water supply unit F is present has been described by way of example.
  • the overall air conditioning loads of the indoor unit B and the indoor unit C may be desirably balanced.
  • Fig. 5 is a refrigerant circuit diagram illustrating another example of the refrigerant circuit configuration of a refrigeration cycle apparatus according to an embodiment of the present invention (hereinafter referred to as a refrigeration cycle apparatus 100A).
  • the refrigerant circuit configuration and operation of the refrigeration cycle apparatus 100A will be described with reference to Fig. 5 .
  • a case where the refrigeration cycle apparatus 100A is an air-conditioning apparatus capable of simultaneously supplying a cooling load and a heating load (or a hot water load) by utilizing a refrigeration cycle in which a refrigerant (heat-source refrigerant) is circulated is illustrated by way of example.
  • the difference between Fig. 5 and Fig. 1 will be primarily described, and, in Fig. 5 , the same portions as those in Fig. 1 are assigned the same numerals and a description thereof is omitted.
  • Each of the indoor units B1 has mounted therein an indoor heat exchanger 118. That is, each of the indoor units B1 is different from the indoor unit B in that the air conditioning expansion device 117 is not mounted.
  • the indoor heat exchangers 118 are designed to be connected to heat medium flow control devices 75 and second heat medium flow switching devices 76 in the relay unit E1 by refrigerant pipes 6.
  • Fig. 5 a case where four indoor units B1 are connected to the relay unit E1 is illustrated by way of example. However, the number of indoor units B1 connected is not limited to four.
  • Each of the four second heat medium flow switching devices 76 is constituted by a three-way valve or the like, and is configured to switch the flow path of the heat medium.
  • the second heat medium flow switching devices 76 the number of which corresponds to the number of indoor units B installed (here, four), are provided.
  • one of the three ways is connected to the associated heat exchanger related to heat medium 71 a
  • another of the three ways is connected to the associated heat exchanger related to heat medium 71b
  • the other of the three ways is connected to the associated indoor heat exchanger 118
  • the second heat medium flow switching devices 76 are provided on the inlet side of the heat medium flow paths extending from the indoor heat exchangers 118.
  • the refrigeration cycle apparatus 100A having the above configuration increases the system COP by causing the hot-water supply device to operate when the cooling load is larger than the heating load (or the hot water load), and enables a reduction in running cost while achieving energy saving.
  • the refrigeration cycle apparatus 100A further improves the motor efficiency of the air conditioning compressor 101 by causing the heating device (or the hot-water supply device) to operate during the small-capacity heating operation, and enables a reduction in running cost while further achieving energy saving. Additionally, in the case of the small-capacity overloaded heating operation, the refrigeration cycle apparatus 100A causes the heating device (or the hot-water supply device) to operate, thereby reducing the high-pressure-side pressure and allowing for continuation of stable operation.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Pump Type And Storage Water Heaters (AREA)
  • Air Conditioning Control Device (AREA)
EP09851418.5A 2009-11-18 2009-11-18 Kältekreislaufvorrichtung und daran adaptierte informationsverbreitungsverfahren Not-in-force EP2503266B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2009/006177 WO2011061792A1 (ja) 2009-11-18 2009-11-18 冷凍サイクル装置及びそれに適用される情報伝達方法

Publications (3)

Publication Number Publication Date
EP2503266A1 true EP2503266A1 (de) 2012-09-26
EP2503266A4 EP2503266A4 (de) 2016-10-05
EP2503266B1 EP2503266B1 (de) 2018-10-24

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EP09851418.5A Not-in-force EP2503266B1 (de) 2009-11-18 2009-11-18 Kältekreislaufvorrichtung und daran adaptierte informationsverbreitungsverfahren

Country Status (5)

Country Link
US (1) US20120222440A1 (de)
EP (1) EP2503266B1 (de)
JP (1) JP5642085B2 (de)
CN (1) CN102695929B (de)
WO (1) WO2011061792A1 (de)

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EP4227605A1 (de) * 2022-02-11 2023-08-16 Daikin Europe N.V. Kühlvorrichtung

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EP2559953B1 (de) * 2010-04-15 2016-09-28 Mitsubishi Electric Corporation Wassererhitzersystem und Betriebsverfahren für das Wassererhitzersystem
KR101212698B1 (ko) * 2010-11-01 2013-03-13 엘지전자 주식회사 히트 펌프식 급탕장치
KR101203579B1 (ko) * 2010-11-05 2012-11-21 엘지전자 주식회사 공조 겸용 급탕 장치 및 그 운전방법
EP2781848B1 (de) * 2011-09-29 2019-12-04 Mitsubishi Electric Corporation Kombiniertes klimaanlagen-/heisswasserversorgungssystem
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WO2011061792A1 (ja) 2011-05-26
JPWO2011061792A1 (ja) 2013-04-04
US20120222440A1 (en) 2012-09-06
CN102695929A (zh) 2012-09-26
CN102695929B (zh) 2014-07-30
EP2503266A4 (de) 2016-10-05
EP2503266B1 (de) 2018-10-24

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