EP2672204B1 - Dispositif à cycle de réfrigération binaire - Google Patents

Dispositif à cycle de réfrigération binaire Download PDF

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Publication number
EP2672204B1
EP2672204B1 EP12754509.3A EP12754509A EP2672204B1 EP 2672204 B1 EP2672204 B1 EP 2672204B1 EP 12754509 A EP12754509 A EP 12754509A EP 2672204 B1 EP2672204 B1 EP 2672204B1
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EP
European Patent Office
Prior art keywords
utilization
temperature
heat exchanger
refrigeration cycle
fluid
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EP12754509.3A
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German (de)
English (en)
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EP2672204A4 (fr
EP2672204A1 (fr
Inventor
Tsukasa TAKAYAMA
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Toshiba Carrier Corp
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Toshiba Carrier Corp
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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
    • F25B1/00—Compression machines, plants or systems with non-reversible cycle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D19/00—Details
    • F24D19/10—Arrangement or mounting of control or safety devices
    • F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
    • F24D19/1009—Arrangement or mounting of control or safety devices for water heating systems for central heating
    • F24D19/1015—Arrangement or mounting of control or safety devices for water heating systems for central heating using a valve or valves
    • F24D19/1021—Arrangement or mounting of control or safety devices for water heating systems for central heating using a valve or valves a by pass valve
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D19/00—Details
    • F24D19/10—Arrangement or mounting of control or safety devices
    • F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
    • F24D19/1051—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
    • 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
    • F24H15/227—Temperature of the refrigerant in heat pump cycles
    • F24H15/232—Temperature of the refrigerant in heat pump cycles at the condenser
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/20—Control of fluid heaters characterised by control inputs
    • F24H15/258—Outdoor temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
    • F24H15/375—Control of heat pumps
    • F24H15/385—Control of expansion valves of heat pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • 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
    • F24H9/00—Details
    • F24H9/20—Arrangement or mounting of control or safety devices
    • F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • 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
    • F25B49/027—Condenser control 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
    • F25B7/00—Compression machines, plants or systems, with cascade operation, i.e. with two or more circuits, the heat from the condenser of one circuit being absorbed by the evaporator of the next circuit
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D2200/00—Heat sources or energy sources
    • F24D2200/12—Heat pump
    • F24D2200/123—Compression type heat pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
    • F24H15/375—Control of heat pumps
    • F24H15/38—Control of compressors of heat pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/40—Control of fluid heaters characterised by the type of controllers
    • F24H15/414—Control of fluid heaters characterised by the type of controllers using electronic processing, e.g. computer-based
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2339/00—Details of evaporators; Details of condensers
    • F25B2339/04—Details of condensers
    • F25B2339/047—Water-cooled condensers
    • 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
    • F25B2600/2501—Bypass valves

Definitions

  • the present embodiment of this invention relates to a binary refrigeration cycle system.
  • JP 2010 276230 A discloses a refrigeration device capable of supplying hot water by utilizing waste heat in cooling.
  • JP 2002 235953 A discloses a heat pump water heater.
  • a binary refrigeration cycle system including a low temperature-side refrigeration cycle and a high temperature-side refrigeration cycle to supply high-temperature heat to a heat utilization device is sometimes employed as refrigeration cycle apparatus such as air conditioner and heat pump water heater.
  • Each of the low temperature-side refrigeration cycle and the high temperature-side refrigeration cycle of the binary refrigeration cycle system is provided with a compressor, an expansion unit, and the like.
  • the low temperature-side refrigeration cycle and the high temperature-side refrigeration cycle are connected to be capable of exchanging heat via an intermediate heat exchanger.
  • High-temperature heat extracted by a heat source-side heat exchanger as a low temperature-side evaporator provided in the low temperature-side refrigeration cycle is supplied to the heat utilization device via a utilization-side heat exchanger as a high temperature-side condenser provided in the high temperature-side refrigeration cycle.
  • Patent Document 1 Japanese Patent Laid-Open Publication No. 08-189714
  • the present invention has been made in view of the above mentioned problem, and an object of an embodiment thereof is to provide a binary refrigeration cycle system which solves the problem of a reduction in reliability of a compressor, and hence, solves the problem of a reduction in reliability of the refrigeration cycle system.
  • a binary refrigeration cycle system 100 includes a low temperature-side refrigeration cycle 6a and a high temperature-side refrigeration cycle 6b which are arranged to be capable of exchanging heat via an intermediate heat exchanger 5.
  • the binary refrigeration cycle system 100 includes a first casing 8a and a second casing 8b.
  • a low temperature-side compressor 1a In the first casing 8a, a low temperature-side compressor 1a, a low temperature-side four-way valve 2a connected to the low temperature-side compressor 1a by a refrigerant pipe, a heat source-side heat exchanger 3 that exchanges heat with outside air (an external heat source), and a low temperature-side expansion unit 4a are provided so as to be sequentially connected by a refrigerant pipe.
  • connection pipes 9a and 9b are also connected to the low temperature-side four-way valve 2a and the low temperature-side expansion unit 4a, respectively, and the connection pipes 9a and 9b are connected to the intermediate heat exchanger 5 provided in the second casing 8b.
  • the heat source-side heat exchanger 3 is provided with an air blower 11, which encourages heat exchange with outside air.
  • the heat source-side heat exchanger 3 is also provided with an outside air temperature sensor 16 as an external heat source temperature detection unit, which detects a temperature of outside air supplied to the heat source-side heat exchanger 3 by the air blower 11.
  • a high temperature-side compressor 1b a high temperature-side four-way valve 2b connected to the high temperature-side compressor 1b, the intermediate heat exchanger 5, a high temperature-side expansion unit 4b, and a utilization-side heat exchanger 7 are sequentially connected by a refrigerant pipe to thereby constitute the high temperature-side refrigeration cycle 6b.
  • High temperature-side refrigerant temperature sensors 17a and 17b as refrigerant temperature detection units are provided in the refrigerant pipe on an inlet side and an outlet side of the utilization-side heat exchanger 7.
  • the high temperature-side refrigerant temperature sensors 17a and 17b detect temperature of the refrigerant flowing into the utilization-side heat exchanger 7 and temperature of the refrigerant flowing out of the utilization-side heat exchanger 7.
  • Packed valves 21a and 21 b to be connected with the connection pipes 9a and 9b are connected to the intermediate heat exchanger 5.
  • the connection pipes 9a and 9b are connected to the packed valves 21a and 21 b, the low temperature-side refrigeration cycle 6a is constituted, thereby being capable of performing heat exchange between the low temperature-side refrigeration cycle 6a and the high temperature-side refrigeration cycle 6b through the intermediate heat exchanger 5.
  • the type of the enclosed refrigerant varies in accordance with an intended use of the binary refrigeration cycle system 100, and for example, when the binary refrigeration cycle system 100 uses a high-temperature heat pump water heater that generates hot water of almost 90°C by using the utilization-side heat exchanger 7 as a water heat exchanger, a working refrigerant, such as R410A, exhibiting good performance even at a low outside air temperature (about - 15°C) is preferably employed as a low temperature-side refrigerant used in the low temperature-side refrigeration cycle 6a, and a working refrigerant, such as R134a, exhibiting good performance at a high temperature (about 95°C) is preferably employed as a high temperature-side refrigerant used in the high temperature-side refrigeration cycle 6b.
  • a working refrigerant such as R410A
  • R134a exhibiting good performance even at a low outside air temperature (about - 15°C)
  • a working refrigerant, such as R134a exhibiting good performance at
  • a utilization-side fluid pipe 18 that supplies heat extracted by the binary refrigeration cycle system 100 to a heat utilization device that utilizes the heat is connected to the utilization-side heat exchanger 7.
  • the utilization-side pipe 18 includes connection port portions 23a and 23b to be connected to the heat utilization device, and a feed pump 10 that feeds a utilization-side fluid within the utilization-side fluid pipe 18.
  • the connection port portion 23a, an inlet-side branch portion 12a, the feed pump 10, the utilization-side heat exchanger 7, an outlet-side branch portion 12b, and the connection port portion 23b are sequentially connected in this order by means of the utilization-side pipe 18.
  • bypass passage 13 which is connected to the utilization-side pipe 18 in parallel with the utilization-side heat exchanger 7.
  • a flow control valve 14 is provided in an intermediate portion of the bypass passage 13.
  • a fluid control unit in the present embodiment controls an opening degree of the flow control valve 14 to thereby control a flow rate of the utilization-side fluid circulated in the bypass passage 13.
  • the utilization-side fluid is fed to the connection port portion 23b sequentially through the connection port portion 23a, the inlet-side branch portion 12a, the utilization-side heat exchanger 7, and the outlet-side branch portion 12b.
  • the flowing direction of the utilization-side fluid is indicated by a dashed arrow in Fig. 1 .
  • the utilization-side fluid in the bypass passage 13 flows in a direction from the outlet-side branch portion 12b to the inlet-side branch portion 12a when the flow control valve 14 is opened.
  • inlet-side branch portion 12a, the outlet-side branch portion 12b, the feed pump 10, and the bypass passage 13 are mounted in the second casing 8b.
  • a water temperature sensor 15 as a utilization-side fluid temperature detection unit is provided for the utilization-side fluid pipe 18 between the feed pump 10 and the utilization-side heat exchanger 7.
  • the water temperature sensor 15 detects a temperature of the utilization-side fluid flowing into the utilization-side heat exchanger 7.
  • Hot water or brine for supplying heat to the heat utilization device is enclosed and circulated in the utilization-side fluid pipe 18.
  • the outside air temperature sensor 16, the high temperature-side refrigerant temperature sensors 17a and 17b, and the water temperature sensor 15 are connected to a controller 23 so as to detect the outside air temperature, the temperature of the refrigerant in the high temperature-side refrigeration cycle, and the temperature of the utilization-side fluid such as hot water and brine flowing into the utilization-side heat exchanger 7.
  • the second casing 8b is provided with an electric component box 22 for controlling operation of the binary refrigeration cycle system 100.
  • the electric component box 22 is therein provided with an inverter circuit, not shown, that drives the low temperature-side compressor 1a and the high temperature-side compressor 1b, and the controller 23 that controls opening degrees of the low temperature-side expansion unit 4a and the high temperature-side expansion unit 4b and also controls switching of the low temperature-side four-way valve 2a and the high temperature-side four-way valve 2b.
  • the low temperature-side refrigeration cycle 6a and the high temperature-side refrigeration cycle 6b are controlled by the inverter circuit and the controller 23 to be operated under optimum operating conditions.
  • the flow of the refrigerant during heating operation of the binary refrigeration cycle system 100 is indicated by a solid arrow in Fig. 1 .
  • the low temperature-side refrigerant sequentially passes through the low temperature-side compressor 1a, the low temperature-side four-way valve 2a, a low temperature-side flow passage of the intermediate heat exchanger 5, the low temperature-side expansion unit 4a, and the heat source-side heat exchanger 3, and returns to the low temperature-side compressor 1a through the low temperature-side four-way valve 2a.
  • the high temperature-side refrigerant compressed in the high temperature-side compressor 1b sequentially passes through the high temperature-side four-way valve 2b, the utilization-side heat exchanger 7, the high temperature-side expansion unit 4b, and a high temperature-side flow passage of the intermediate heat exchanger 5, and returns to the high temperature-side compressor 1b through the high temperature-side four-way valve 2b.
  • the low temperature-side refrigerant is evaporated in the heat source-side heat exchanger 3 and condensed in the low temperature side of the intermediate heat exchanger 5.
  • the high temperature-side refrigerant is condensed in the utilization-side heat exchanger 7 to supply heat to the hot water or brine in the utilization-side pipe 18 on a utilization side.
  • the refrigerant in form of liquid decompressed by the high temperature-side expansion unit 4b is evaporated in the high temperature-side flow passage of the intermediate heat exchanger 5 to thereby absorb the condensation heat of the low temperature-side refrigerant as evaporation heat.
  • the utilization-side fluid fed by the feed pump 10 is circulated in the utilization-side pipe 18.
  • the temperature of the high temperature-side refrigerant in the utilization-side heat exchanger 7 becomes lower than a predetermined temperature Tb1, and a compression ratio in the high temperature-side compressor 1b is reduced. If the compressor is operated with a reduced compression ratio, reliability of the compressor is lowered.
  • the water temperature sensor 15, the outside air temperature sensor 16, the high temperature-side refrigerant temperature sensors 17a and 17b, and the flow control valve 14 are connected to the controller 23 located in the electric component box 22 of the binary refrigeration cycle system 100.
  • the flow control valve 14 in the bypass passage 13 is opened.
  • the utilization-side fluid flowing out of the utilization-side heat exchanger 7 is thereby fed to the inlet-side branch portion 12a from the outlet-side branch portion 12b through the bypass passage 13, and mixed with a utilization-side fluid newly flowing into the utilization-side heat exchanger 7 from the connection port body 23a, thereby being flowed into the utilization-side heat exchanger 7 as a utilization-side fluid having an intermediate temperature.
  • the controller 23 determines whether or not a difference (Tw - T0) between an outside air temperature T0 detected by the outdoor temperature sensor 16 and a utilization-side fluid temperature Tw detected by the utilization-side fluid temperature sensor 15 mounted on the inlet side of the utilization-side heat exchanger 7 is equal to or smaller than a predetermined temperature Ta (step S201).
  • step S201 when the difference between the detected outside air temperature T0 and the detected utilization-side fluid temperature Tw is greater than the predetermined temperature Ta (NO in step S201), the flow control valve 14 in the bypass passage 13 is closed (step S205) so as to entirely feed the utilization-side fluid flowing out of the utilization-side heat exchanger 7 to the heat utilization device.
  • step S201 when the difference between the outside air temperature T0 and the utilization-side fluid temperature Tw is equal to or smaller than the predetermined temperature Ta (YES in step S201), the flow control valve 14 in the bypass passage 13 is opened by a predetermined opening degree (step S202) so as to partially feed the utilization-side fluid flowing out of the utilization-side heat exchanger 7 to the utilization-side fluid inlet of the utilization-side heat exchanger 7 through the bypass passage 13. Accordingly, the high-temperature utilization-side fluid flowing out of the utilization-side heat exchanger 7 is mixed with the low-temperature utilization-side fluid supplied from the heat utilization device so as to provide an intermediate temperature, and is then flowed into the utilization-side heat exchanger 7.
  • an average temperature between the temperatures Ts1 and Ts2 of the high temperature-side refrigerant flowing into and flowing out of the utilization-side heat exchanger 7 detected by the two high temperature-side refrigerant temperature sensors 17a and 17b is calculated.
  • the average temperature is used as an estimate of a condensation temperature Ts of the high temperature-side refrigerant. It is then determined whether or not the condensation temperature Ts is within a range of predetermined temperatures Tb1 to Tb2 (Tb1 ⁇ Tb2) (steps S203 and S204).
  • step S203 it is determined whether or not the condensation temperature Ts of the high temperature-side refrigerant is equal to or higher than Tb1 (step S203), and in a case when the condensation temperature Ts of the high temperature-side refrigerant is lower than Tb1 (NO in step S203), the opening degree of the flow control valve 14 is increased (step S206). The process then returns to step S203.
  • step S203 in a case when the condensation temperature Ts of the high temperature-side refrigerant is equal to or higher than Tb1 (YES in step S203), it is determined whether or not the condensation temperature Ts of the high temperature-side refrigerant is equal to or lower than Tb2 (step S204). While, in a case when the condensation temperature Ts of the high temperature-side refrigerant is higher than Tb2 (NO in step S204), the opening degree of the flow control valve 14 is decreased (step S207), and the process then returns to step S203.
  • step S203 when the condensation temperature Ts of the high temperature-side refrigerant in the utilization-side heat exchanger 7 is within the range of the predetermined temperatures Tb1 to Tb2 (YES in step S203 and YES in step S204), the opening degree of the flow control valve 14 is maintained, and the process returns to step S201.
  • the flow control valve 14 is released, the heated utilization-side fluid is mixed with the utilization-side fluid to be supplied to the utilization-side heat exchanger 7, and the temperature of the utilization-side fluid flowing into the utilization-side heat exchanger is increased.
  • the temperature of the utilization-side fluid to be supplied to the utilization-side heat exchanger 7 can be increased to an optimum temperature at which the compressor is not operated with a reduced compression ratio.
  • the lowering in the condensation temperature of the utilization-side heat exchanger 7 can be suppressed, and then, the reduction in the compression ratio can be suppressed. Accordingly, it is possible to prevent a reduction in the reliability of the compressor occurring in a low compression ratio state, and eventually, to prevent a reduction in reliability of the binary refrigeration cycle system 100.
  • the binary refrigeration cycle system 100 by constituting the binary refrigeration cycle system 100 with the first casing and the second casing independently from each other, the binary refrigeration cycle system 100 can be provided flexibly to a state of an installation place.
  • the first casing accommodating the heat source-side heat exchanger 3 may be arranged on the outdoor side space
  • the second casing accommodating the utilization-side heat exchanger may be arranged on the indoor side space.
  • the present invention is not limited thereto, and the high temperature-side refrigeration cycle and the low temperature-side refrigeration cycle may be provided in one casing.
  • the fluid control unit that controls the flow rate of the utilization-side fluid circulated in the bypass passage 13 is adapted to control the opening degree of the flow control valve 14, a different control unit may be used.
  • a three-way valve may be employed as at least one of the inlet-side branch portion 12a and the outlet-side branch portion 12b so that an opening degree of the three-way valve is controlled as the flow control valve.
  • the present invention is not limited to the embodiments described above, and a plurality of constitutional elements disclosed in the embodiments of the present invention may be combined appropriately to form various embodiments within the scope of protection as claimed. For example, some constitutional elements may be deleted from all the constitutional elements disclosed in the embodiments of the present invention. Moreover, constitutional elements in different embodiments may be combined appropriately.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Heat-Pump Type And Storage Water Heaters (AREA)
  • Devices That Are Associated With Refrigeration Equipment (AREA)
  • Other Air-Conditioning Systems (AREA)

Claims (1)

  1. Système de cycle de réfrigération binaire (100) comprenant:
    un cycle de réfrigération de côté à basse température (6a) comprenant un échangeur de chaleur de côté de source de chaleur (3) qui est configuré pour absorber de la chaleur d'une source de chaleur externe, et un compresseur de côté à basse température (1a) ;
    un cycle de réfrigération de côté à haute température (6b) comprenant un échangeur de chaleur de côté d'utilisation (7) qui est configuré pour fournir de la chaleur à un côté d'utilisation, et un compresseur de côté à haute température (1 b) ;
    un échangeur de chaleur intermédiaire (5) qui est configuré pour échanger de la chaleur entre un réfrigérant dans le cycle de réfrigération de côté à basse température (6a) et un réfrigérant dans le cycle de réfrigération de côté à haute température (6b) ;
    un boîtier (8b) sur lequel au moins l'échangeur de chaleur de côté d'utilisation est monté ;
    un tuyau de côté d'utilisation (18) qui est prévu pour le boîtier (8b) et relié à l'échangeur de chaleur de côté d'utilisation (7) de manière à échanger de la chaleur entre un fluide de côté d'utilisation en circulation et le réfrigérant dans le cycle de réfrigération de côté à haute température (6b) et à fournir de la chaleur au côté d'utilisation ;
    un passage de dérivation (13) qui est relié au tuyau de côté d'utilisation (18) parallèlement à l'échangeur de chaleur de côté d'utilisation (7) de manière à alimenter le fluide de côté d'utilisation dans le tuyau de côté d'utilisation (18) depuis un côté de sortie d'échangeur de chaleur de côté d'utilisation (12b) vers un côté d'entrée (12a) d'échangeur de chaleur de côté d'utilisation (7) ; et
    une unité de régulation de fluide qui est configurée pour réguler un écoulement du fluide de côté d'utilisation en circulation dans le passage de dérivation (13), dans lequel l'unité de régulation de fluide comprend une unité de détection de température de fluide de côté d'utilisation (15) qui est configurée pour détecter une température du fluide de côté d'utilisation s'écoulant dans l'échangeur de chaleur de côté d'utilisation (7), une unité de détection de température de source de chaleur externe (16) qui est prévue à l'échangeur de chaleur de côté de source de chaleur (3) pour détecter une température de la source de chaleur externe, et une vanne de régulation d'écoulement (14) qui est configurée pour changer un débit dans le passage de dérivation (13), caractérisé en ce que
    l'unité de régulation de fluide est régulée de manière à ouvrir la vanne de régulation d'écoulement (14) lorsqu'une différence entre la température du fluide de côté d'utilisation détectée par l'unité de détection de température de fluide de côté d'utilisation (15) et la température de la source de chaleur externe détectée par l'unité de détection de température de source de chaleur externe (16) est inférieure ou égale à une valeur prédéterminée.
EP12754509.3A 2011-03-09 2012-03-08 Dispositif à cycle de réfrigération binaire Active EP2672204B1 (fr)

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EP4257894A4 (fr) * 2020-12-01 2024-05-29 Daikin Industries, Ltd. Système à cycle frigorifique

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CN103528188B (zh) * 2013-11-04 2016-09-21 Tcl空调器(中山)有限公司 空气源热水机***及其控制方法
JP6910210B2 (ja) * 2017-02-03 2021-07-28 三星電子株式会社Ｓａｍｓｕｎｇ Ｅｌｅｃｔｒｏｎｉｃｓ Ｃｏ．，Ｌｔｄ． 空気調和装置
FR3082606B1 (fr) * 2018-06-13 2020-07-03 Lacaze Energies Module de transfert thermique pour la production d'eau chaude
CN111595000B (zh) * 2020-05-18 2022-03-29 广东美的暖通设备有限公司 空调***及其水力模块的控制方法、装置和存储介质
JP7265193B2 (ja) * 2021-09-30 2023-04-26 ダイキン工業株式会社 カスケードユニットおよび冷凍サイクル装置
JP7235998B1 (ja) 2021-09-30 2023-03-09 ダイキン工業株式会社 カスケードユニットおよび冷凍サイクル装置

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JPH08189714A (ja) 1995-01-13 1996-07-23 Daikin Ind Ltd 二元冷凍装置
JP2000018712A (ja) * 1998-06-30 2000-01-18 Kyocera Corp 給湯装置
JP2002048398A (ja) * 2000-07-31 2002-02-15 Daikin Ind Ltd ヒートポンプ式給湯装置
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JP5585003B2 (ja) 2009-05-27 2014-09-10 三洋電機株式会社 冷凍装置
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EP4257894A4 (fr) * 2020-12-01 2024-05-29 Daikin Industries, Ltd. Système à cycle frigorifique

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KR20130116360A (ko) 2013-10-23
EP2672204A4 (fr) 2015-06-17
WO2012121326A1 (fr) 2012-09-13
CN103415749B (zh) 2015-09-09
KR101510978B1 (ko) 2015-04-10
JP5681787B2 (ja) 2015-03-11
EP2672204A1 (fr) 2013-12-11
JPWO2012121326A1 (ja) 2014-07-17
CN103415749A (zh) 2013-11-27

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