WO2002046666A1 - Unite de source de chaleur pour refrigerateur et refrigerateur - Google Patents

Unite de source de chaleur pour refrigerateur et refrigerateur Download PDF

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Publication number
WO2002046666A1
WO2002046666A1 PCT/JP2001/010759 JP0110759W WO0246666A1 WO 2002046666 A1 WO2002046666 A1 WO 2002046666A1 JP 0110759 W JP0110759 W JP 0110759W WO 0246666 A1 WO0246666 A1 WO 0246666A1
Authority
WO
WIPO (PCT)
Prior art keywords
heat exchanger
refrigeration
temperature
indoor
unit
Prior art date
Application number
PCT/JP2001/010759
Other languages
English (en)
Japanese (ja)
Inventor
Kenji Tanimoto
Masaaki Takegami
Kazuyoshi Nomura
Original Assignee
Daikin Industries, Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Daikin Industries, Ltd. filed Critical Daikin Industries, Ltd.
Priority to AU2002221092A priority Critical patent/AU2002221092A1/en
Publication of WO2002046666A1 publication Critical patent/WO2002046666A1/fr

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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
    • 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
    • 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
    • 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
    • F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
    • F25B2400/07—Details of compressors or related parts
    • F25B2400/075—Details of compressors or related parts with parallel compressors
    • 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
    • F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
    • F25B2400/16—Receivers
    • 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
    • F25B2600/02—Compressor control
    • F25B2600/021—Inverters therefor
    • 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
    • F25B2700/2115—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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Definitions

  • the present invention relates to a refrigeration apparatus and a heat source unit for a refrigeration apparatus, and more particularly to a refrigerant circuit configuration that simultaneously performs heat absorption and heat radiation.
  • a refrigeration system has a plurality of utilization units connected to one heat source unit.
  • a so-called multi-type is known, in which a utilization unit performs an endothermic operation and a heat radiation operation, and another utilization unit performs only an endothermic operation.
  • heat dissipation is achieved by connecting a utilization unit that performs heat absorption operation and heat radiation operation and a utilization unit that performs only heat absorption operation with liquid piping, high-temperature gas piping, and low-temperature gas piping.
  • the cold energy obtained from the operating unit that performs the operation is directly supplied to other utilization units that perform the endothermic operation.
  • This type of refrigeration system is installed in, for example, a convenience store, and is used as a refrigeration system that simultaneously performs air conditioning in a store and cooling in a freezer.
  • this type of refrigeration system is designed as a whole, and connects the heat source unit and each utilization unit via liquid piping, high-temperature gas piping, and low-temperature gas piping, and performs heat absorption operation and heat radiation operation.
  • the existing utilization unit cannot be used because it is integrally configured by connecting the utilization unit that performs heat absorption and the utilization unit that performs only endothermic operation. Was.
  • the present invention has been made in view of the above, and has as its object to improve versatility. Disclosure of the invention In the present invention, two systems, a system (1) for performing heat absorption and heat dissipation operation and a system (2) for performing only heat absorption operation, are separately connected to the heat source unit (11).
  • the first solution means taken by the present invention is directed to a heat source unit for a refrigeration system, and has a first end (1) configured to be connectable to a first system (1) that switches between a heat absorption operation and a heat radiation operation. It comprises a single system section (47) and a second system section (48) having an end configured to be connectable to a second system (2) that performs only the heat absorption operation.
  • a second solution taken by the present invention is the first solution, comprising a compressor (41, 42) and a heat source side heat exchanger (32), wherein the heat source side heat exchanger (32) Is connected so as to switch between the discharge side and the suction side of the compressor (41, 42), while the liquid side of the first system (47) is connected to the heat source side heat exchanger (32).
  • the gas side of the first system part (47) is connected so that the discharge side and the suction side of the compressor (41, 42) are switched, and the liquid side of the second system part (48) is connected. Is connected to the heat source side heat exchanger (32), and the gas side of the second system section (48) is connected to the suction side of the compressor (41, 42).
  • the third solution taken by the present invention is the second solution described above, wherein the liquid side and the gas side end of the first system section (47) and the liquid side and the gas end of the second system section (48) are provided. On the side ends, on-off valves (35, 36, 37, 38) are provided.
  • the fourth solution taken by the present invention is directed to a refrigeration system, in which a first system (1) that switches between an endothermic operation and a heat dissipation operation, a second system (2) that performs only the endothermic operation, A heat source unit for a refrigeration system having a first system part (47) to which the first system (1) is connected, and a second system part (48) to which the second system (2) is connected. .
  • the heat source unit for a refrigeration system (11) includes a compressor (41, 42) and a heat source side heat exchanger (32).
  • One end of the heat source side heat exchanger (32) is connected so as to switch between the discharge side and the suction side of the compressor (41, 42), and the liquid side of the first system part (47) is connected to the heat source side.
  • the gas side of the first system section (47) is connected to the heat exchanger (32) so that the discharge side and the suction side of the compressor (41, 42) are switched, and the second system section (47) is connected.
  • the liquid side of (48) is connected to the heat source side heat exchanger (32), and the gas side of the second system section (48) is connected to the suction side of the compressor (41, 42). .
  • the sixth solution taken by the present invention is the fifth solution described above, wherein the first system Opening valves (35, 36, 37, 38) are provided at the liquid and gas ends of the part (47) and the liquid and gas ends of the second system part (48), respectively. It is something that can be done.
  • a seventh solution taken by the present invention is the fourth, fifth or sixth solution, wherein the first system (1) is provided from the refrigeration unit heat source unit (11).
  • a liquid pipe (21) and a gas pipe (22) extending to the outside of the heat source unit (11) are provided so as to switch between heat absorption operation and heat radiation operation.
  • a liquid pipe (23) and a gas pipe (24) extending from the heat source unit (11) to the outside of the refrigeration unit heat source unit (11) are provided so that only the heat absorbing operation is performed.
  • the heat source unit (11) supplies cold or warm heat to the first system (1) via the first system (47).
  • the heat source unit (11) supplies cold heat to the second system (2) via the second system section (48).
  • the refrigerant discharged from the compressor (41, 42) flows into the heat source side heat exchanger (32) and condenses, and is condensed by the first system (1) and the second system (2). It flows on the liquid side, absorbs heat in the first system (1) and the second system (2) and evaporates. The evaporated refrigerant flows on the gas side of the first system (1) and the second system (2), and is sucked into the compressors (41, 42).
  • the refrigerant discharged from the compressors (41, 42) flows through the gas side of the first system (1), releases heat in the first system (1), and condenses. I do.
  • the condensed refrigerant flows on the liquid side of the first system (1), flows on the liquid side of the second system (2), absorbs heat in the second system (2), and evaporates.
  • the evaporated refrigerant flows on the gas side of the second system (2) and is sucked into the compressors (41, 42).
  • the refrigeration unit heat source unit (11) supplies cold or warm heat to the first system (1), and the first system (1) performs an endothermic operation or a heat dissipation operation.
  • the heat source unit (11) for the refrigeration system supplies cold heat to the second system (2), and heat absorption operation is performed in the second system (2).
  • the first system (47) and the second system (48) are provided in the heat source unit (11) for the refrigeration system, so that the first system (1) and the second system (2) are provided. ), It is possible to connect the existing utilization unit to the heat source unit for refrigeration equipment (11) Thus, the versatility of the heat source unit (11) for the refrigeration system can be improved. According to the second solution, the cold heat obtained in the first system (1) can be supplied to the second system (2), and waste heat can be effectively used.
  • FIG. 1 is a refrigerant system diagram illustrating a high-temperature side refrigerant circuit of a refrigeration apparatus according to an embodiment.
  • FIG. 2 is a refrigerant system diagram illustrating a low-temperature side refrigerant circuit of the refrigeration apparatus according to the embodiment.
  • the refrigeration apparatus (10) according to the present embodiment is provided in a convenience store, a supermarket, or the like, and is used for cooling a refrigerator or a freezer and for cooling and heating the room.
  • the refrigeration apparatus (10) includes an outdoor unit (11), which is a heat source unit for the refrigeration apparatus, and an endothermic operation and a radiation operation that extend from the outdoor unit (11). And a second system (2) extending from the outdoor unit (11) and performing only heat absorption operation.
  • the first system (1) consists of a first liquid side connecting pipe (21) and a first gas side connecting pipe connecting the first indoor unit (12) and the outdoor unit (11) to the first indoor unit (12).
  • the second system (2) has a second indoor unit (13), a refrigerated unit (14), and a cascade unit (15).
  • the second system (2) is equipped with a second liquid side communication pipe (23) and a second gas side communication pipe (24) connecting these units (13, 14, 15) to the outdoor unit (11). ing.
  • the refrigeration unit (16) is connected to the second system (2) via a third liquid side communication pipe (26) and a third gas side communication pipe (27).
  • the refrigeration system (10) includes a high-temperature side refrigerant circuit (20) in which a high-temperature side refrigerant circulates and a low-temperature side refrigerant circuit (25) in which a low-temperature side refrigerant circulates, and performs a so-called binary refrigeration cycle. It is configured as follows.
  • the first indoor unit (12) is configured to switch between cooling and heating.
  • the first indoor unit (12) is installed, for example, at a sales floor.
  • the second indoor unit (13) is configured to perform only cooling.
  • This second (2) The indoor unit (13) is installed in a room with a heat load, such as a kitchen, for example.
  • the refrigeration unit (14) is installed in a refrigerator to cool the air inside the refrigerator.
  • the refrigeration unit (16) is installed in a freezer to cool the air in the freezer.
  • the refrigeration unit (14) may be provided in a refrigerated showcase, and the refrigeration unit (16) may be provided in a refrigerated showcase.
  • the outdoor unit (11) includes an outdoor circuit (30).
  • the outdoor circuit (30) includes a compressor unit (40), a four-way switching valve (31), an outdoor heat exchanger (32), an outdoor expansion valve (34), a receiver (33), and an on-off valve.
  • the first liquid-side shutoff valve (35), the first gas-side shutoff valve (36), the second liquid-side shutoff valve (37), and the second gas-side shutoff valve (38) are configured so that refrigerant piping can be connected. ing.
  • the outdoor circuit (30) is provided with a degassing pipe (64), a pressure equalizing pipe (66), and a liquid supply pipe (68).
  • the compressor unit (40) has a first compressor (41) and a second compressor (42) connected in parallel.
  • Each of the first and second compressors (41, 42) is a closed-type, high-pressure dome-type scroll compressor. That is, these compressors (41, 42) are configured by housing a compression mechanism and an electric motor for driving the compression mechanism in a cylindrical housing. The illustration of the compression mechanism and the electric motor is omitted.
  • the first compressor (41) is of a variable capacity in which the number of revolutions of the motor is changed stepwise or continuously.
  • the second compressor (42) has a constant capacity in which the electric motor is always driven at a constant rotation speed.
  • the compressor unit (40) has a variable unit capacity due to a change in the capacity of the first compressor (41) and a start / stop of the second compressor (42).
  • the compressor unit (40) includes a suction pipe (43) and a discharge pipe (44).
  • the inlet end of the suction pipe (43) is connected to the first port of the four-way switching valve (31), and the outlet end of the suction pipe (43) is branched into two to be connected to the suction side of each compressor (41, 42). It is connected.
  • the discharge pipe (44) has its inlet end branched into two and connected to the discharge side of each compressor (41, 42), and its outlet end connected to the second port of the four-way switching valve (31). It is connected.
  • a discharge-side check valve (45) is installed in the branch pipe of the discharge pipe (44) connected to the second compressor (42). Have been killed. The discharge-side check valve (45) allows only the refrigerant to flow in the direction flowing out of the second compressor (42).
  • the compressor unit (40) includes an oil separator (51), an oil return pipe (52), and an oil equalizing pipe (54).
  • the oil separator (51) is provided in the middle of the discharge pipe (44). This oil separator (51) is for separating refrigeration oil from refrigerant discharged from the compressors (41, 42).
  • the oil return pipe (52) has one end connected to the oil separator (51) and the other end connected to the suction pipe (43).
  • the oil return pipe (52) is for returning the refrigerating machine oil separated by the oil separator (51) to the suction side of the compressors (41, 42), and includes an oil return solenoid valve (53). ing.
  • the oil equalizing pipe (54) is for averaging the amount of refrigerating machine oil stored in the housing of each compressor (41, 42), and includes an oil equalizing solenoid valve (55).
  • the four-way switching valve (31) has a third port connected to the first gas side shut-off valve (36) and a fourth port connected to the upper end of the outdoor heat exchanger (32). It has been.
  • the four-way switching valve (31) has a state in which the first port and the third port are in communication and the second port and the fourth port are in communication (the state shown by the solid line in FIG. 1); The state is switched to a state in which the port and the fourth port communicate with each other and the second port and the third port communicate with each other (the state shown by the broken line in FIG. 1).
  • one end of the outdoor heat exchanger (32) is connected to be switched to the discharge side or the suction side of the compressor (41, 42).
  • the first gas side shut-off valve (36) and the discharge side or the suction side of the compressors (41, 42) are switchably connected to each other to form a first system part (47).
  • the gas-side end of the first system (47) is provided with a first gas-side shut-off valve (36), and is configured to be connectable to the first system (1).
  • the outdoor heat exchanger (32) is composed of a cross-fin type fin-and-tube heat exchanger.
  • the high-temperature side refrigerant circulating in the high-temperature side refrigerant circuit (20) exchanges heat with the outdoor air.
  • the receiver (33) is a cylindrical container for storing a refrigerant. This receiver (33) is connected to the outdoor heat exchanger (32) via the inlet pipe (60). It is connected to the first liquid side shut-off valve (35) via the outflow pipe (62). The first liquid side shut-off valve (35) and the outdoor heat exchanger (32) are connected to form the first system part (47). The liquid-side end of the first system (47) is provided with a first liquid-side shut-off valve (35), so that the first system (1) can be connected.
  • the inlet end of the inflow pipe (60) is branched into two branch pipes (60a, 60b), and the outlet end is connected to the upper end of the receiver (33).
  • the first branch pipe (60a) of the inflow pipe (60) is connected to the lower end of the outdoor heat exchanger (32).
  • the first branch pipe (60a) is provided with a first inflow check valve (61a).
  • the first inflow check valve (61a) allows only the flow of the refrigerant from the outdoor heat exchanger (32) to the receiver (33).
  • the second branch pipe (60b) of the inflow pipe (60) is connected to the first liquid side shut-off valve (35).
  • the second branch pipe (60b) is provided with a second inflow check valve (61b).
  • the second inlet check valve (61b) allows only the flow of refrigerant from the first liquid side shut-off valve (35) to the receiver (33).
  • the outflow pipe (62) has its inlet end connected to the lower end of the receiver (33), and its outlet end side branched into two branch pipes (62a, 62b).
  • the first branch pipe (62a) of the outlet pipe (62) is connected to the lower end of the outdoor heat exchanger (32).
  • the first branch pipe (62a) is provided with the outdoor expansion valve (34).
  • the second branch pipe (62b) of the outflow pipe (62) is connected to the first liquid side shutoff valve (35).
  • the second branch pipe (62b) is provided with an outflow check valve (63).
  • the outflow check valve (63) allows only the flow of refrigerant from the receiver (33) to the first liquid side shutoff valve (35).
  • the second liquid-side stop valve (37) is connected to a pipe between the outflow check valve (63) and the receiver (33) in the second branch pipe (62b) of the outflow pipe (62).
  • the second liquid side shutoff valve (37) and the outdoor heat exchanger (32) are connected to form the second system part (48).
  • the liquid-side end of the second system (48) is provided with a second liquid-side shut-off valve (37), and is configured to be connectable to the second system (2).
  • the second gas side shutoff valve (38) is connected to the suction pipe (43) of the compressor unit (40) by piping.
  • the second gas side shutoff valve (38) and the suction side of the compressors (41, 42) are connected to form a second system section (48).
  • the gas side end of the second system (48) is equipped with a second gas side shut-off valve (38), which can be connected to the second system (2). Noh is configured.
  • the gas vent pipe (64) is connected to the upper end of the receiver (33), and the other end is connected to the suction pipe (43).
  • the gas vent pipe (64) is provided with a gas vent solenoid valve (65). When the gas release solenoid valve (65) is opened and closed, the flow of the refrigerant in the gas release pipe (64) is interrupted.
  • the equalizing pipe (66) is connected between the gas release solenoid valve (65) and the receiver (33) in the gas release pipe (64), and the other end is connected to the discharge pipe (44).
  • the equalizing pipe (66) is provided with a check valve (67) for equalizing, which permits only the flow of the refrigerant from one end to the other end.
  • the first indoor unit (12) of the first system (1) includes a first indoor circuit (80).
  • the first indoor circuit (80) includes a first indoor heat exchanger (81) and a first indoor expansion valve (82) connected in series by piping.
  • the first indoor expansion valve (82) is connected to a lower end of the first indoor heat exchanger (81).
  • the end of the first indoor circuit (80) on the first indoor expansion valve (82) side is connected to the first liquid side communication pipe (2
  • first liquid side shut-off valve (35) of the outdoor circuit (30) It is connected to the first liquid side shut-off valve (35) of the outdoor circuit (30) via 1). That is, one end of the first liquid side communication pipe (21) is connected to one end of the outdoor heat exchanger (32) via the first liquid side shut-off valve (35), the inflow pipe (60), and the outflow pipe (62). It is connected to the.
  • the end of the first indoor circuit (80) on the side of the first indoor heat exchanger (81) is connected to the first gas side shutoff valve (36) of the outdoor circuit (30) via the first gas side communication pipe (22). ) Is connected. That is, one end of the first gas side communication pipe (22) is connected to the first gas side shutoff valve (36), the four-way switching valve (31), and the discharge pipe (44) or the suction pipe (43).
  • the compressor (41, 42) is connected to be switched to the discharge side or the suction side.
  • the second indoor unit (13), the refrigeration unit (14), and the cascade unit (15) are connected to the second liquid side communication pipe (23) and the second gas side communication pipe. It is connected in parallel to the outdoor unit (11) via (24).
  • the second indoor unit (13) includes a second indoor circuit (90).
  • This second indoor circuit (90) connects the second indoor heat exchanger (91) and the second indoor expansion valve (92) in series. Is connected to the pipe.
  • the second indoor expansion valve (92) is connected to a lower end of the second indoor heat exchanger (91).
  • the refrigeration unit (14) includes a refrigeration circuit (100). This refrigeration circuit (1
  • No. 00 is obtained by connecting a refrigeration heat exchanger (101) and a refrigeration expansion valve (102) in series.
  • the refrigerating expansion valve (102) is connected to the upper end of the refrigerating heat exchanger (101).
  • the cascade unit (15) includes a high-temperature cascade circuit (110).
  • This high-temperature side cascade circuit (110) is a pipe connection of a cascade heat exchanger (111) and a cascade expansion valve (112) in series.
  • the cascade expansion valve (112) is connected to the upper end on the primary side of the cascade heat exchanger (1).
  • One end of the second liquid side communication pipe (23) is connected to the second liquid side closing valve (37). That is, one end of the second liquid side communication pipe (23) is connected to one end of the outdoor heat exchanger (32) through the second liquid side shut-off valve (37), the inflow pipe (60), and the outflow pipe (62). It is connected to the. Further, the second liquid side communication pipe (23) is branched into three at the other end side, and the end of the second indoor circuit (90) on the side of the second indoor expansion valve (92) is connected to the refrigeration circuit (100). ) Is connected to the end on the refrigeration expansion valve (102) side and the end on the high-temperature side cascade circuit (110) on the cascade expansion valve (112) side.
  • One end of the second gas side communication pipe (24) is connected to the second gas side shutoff valve (38). That is, one end of the second gas side communication pipe (24) is connected via the second gas side shutoff valve (38), the four-way switching valve (31), and the discharge pipe (44) or the suction pipe (43).
  • the compressor (41, 42) is connected so as to be switched to the discharge side or the suction side.
  • the second gas side communication pipe (24) is branched into three at the other end side, and the end of the second indoor circuit (90) on the side of the second indoor heat exchanger (91) and the refrigeration circuit ( 100) refrigeration heat exchanger (1
  • the outdoor circuit (30), the first indoor circuit (80), the second indoor circuit (90), the refrigerating circuit (100), the high-temperature side cascade circuit (110), and the first liquid side connecting pipe ( 21), the first gas side communication pipe (22), the second liquid side communication pipe (23), and the second gas side communication pipe (24) constitute a high temperature side refrigerant circuit (20).
  • the first indoor heat exchanger (81), the second indoor heat exchanger (91) and the refrigeration heat exchanger (101) are composed of a cross-fin type fin-and-tube heat exchanger.
  • the high-temperature side refrigerant circulating in the high-temperature side refrigerant circuit (20) exchanges heat with room air.
  • the refrigerating heat exchanger (101) the high-temperature side refrigerant circulating in the high-temperature side refrigerant circuit (20) exchanges heat with the air in the refrigerator.
  • the cascade unit (15) includes a low-temperature cascade circuit (120).
  • the low-temperature cascade circuit (120) includes the secondary side of the cascade heat exchanger (111), the low-temperature compressor (121), the receiver (123), the third liquid-side shutoff valve (124), and the third A gas side shutoff valve (125) is provided.
  • “A” in FIG. 2 corresponds to “A” in FIG. 1
  • “B” in FIG. 2 corresponds to “B” in FIG.
  • the discharge side of the low-temperature side compressor (121) is connected to the upper end of the cascade heat exchanger (111) on the secondary side via a discharge-side check valve (122).
  • the discharge side check valve (122) allows only the flow of the refrigerant from the low temperature side compressor (121) to the cascade heat exchanger (111).
  • the suction side of the low temperature side compressor (121) is connected to the third gas side shutoff valve (125) by piping.
  • the lower end of the secondary side of the cascade heat exchanger (111) is connected to the upper part of the receiver (123) by piping.
  • the bottom of the receiver (123) is connected to the third liquid side shut-off valve (124) by piping.
  • the refrigeration unit (16) includes a refrigeration circuit (130). This refrigeration circuit (1
  • a refrigeration heat exchanger (131) and a refrigeration expansion valve (132) are connected in series by piping.
  • the refrigeration expansion valve (132) is connected to the upper end of the refrigeration heat exchanger (131).
  • the end of the refrigeration circuit (130) on the refrigeration expansion valve (132) side is connected to the third liquid side shutoff valve (124) of the low temperature side cascade circuit (120) via the third liquid side communication pipe (26). It is connected.
  • the end of the refrigeration circuit (130) on the side of the refrigeration heat exchanger (131) is connected to the third gas side shutoff valve (3) of the low temperature side cascade circuit (120) through the third gas side communication pipe (27).
  • the low-temperature side refrigerant circuit (25) includes a low-temperature side cascade circuit (120), a refrigeration circuit (130), a third liquid side communication pipe (26), and a third gas side communication pipe (27). Been I have.
  • the cascade heat exchanger (111) is constituted by a plate heat exchanger.
  • the cascade heat exchanger (111) has a primary flow path and a secondary flow path defined therein.
  • the cascade heat exchanger (111) has its primary side connected to the high-temperature side refrigerant circuit (20) and its secondary side connected to the low-temperature side refrigerant circuit (25).
  • the cascade heat exchanger (111) exchanges heat between the high-temperature side refrigerant flowing through the primary side and the low-temperature side refrigerant flowing through the secondary side. That is, the cascade heat exchanger (111) functions as a cascade condenser in the binary refrigeration cycle.
  • the outdoor unit (11) is provided with an outdoor fan (70) and an outdoor temperature sensor (71).
  • the outdoor fan (70) is for sending outdoor air to the outdoor heat exchanger (32).
  • the outdoor air temperature sensor (71) detects the temperature of the outdoor air sent to the outdoor heat exchanger (32).
  • the outdoor heat exchanger (32) is provided with an outdoor heat exchanger temperature sensor (72) for detecting the heat transfer tube temperature.
  • the suction pipe (43) has a suction pipe temperature sensor (73) for detecting the suction refrigerant temperature of the compressor (41, 42) and a suction pipe temperature sensor (73) for detecting the suction refrigerant pressure of the compressor (41, 42).
  • a low pressure sensor (74) is provided.
  • the discharge pipe (44) has a discharge pipe temperature sensor (75) for detecting the discharge refrigerant temperature of the compressor (41, 42) and a high pressure for detecting the discharge refrigerant pressure of the compressor (41, 42).
  • a pressure sensor (76) and a high pressure switch (77) are provided.
  • the degassing pipe (64) is provided with a degassing pipe temperature sensor (78) for detecting the temperature of the refrigerant after passing through the degassing solenoid valve (65).
  • the first indoor unit (12) is provided with a first indoor fan (83) and a first internal temperature sensor (84).
  • the first indoor fan (83) is for sending indoor air to the first indoor heat exchanger (81).
  • the first inside air temperature sensor (84) is for detecting the temperature of the indoor air sent to the first indoor heat exchanger (81).
  • the first indoor circuit (80) housed in the first indoor unit (12) has a temperature sensor. Sensors are provided. Specifically, the first indoor heat exchanger (81) is provided with a first indoor heat exchanger temperature sensor (85) for detecting the heat transfer tube temperature. In the vicinity of the upper end of the first indoor heat exchanger (81) in the first indoor circuit (80), a first gas side temperature sensor (86) for detecting the temperature of the gas refrigerant flowing through the first indoor circuit (80) is provided. It is set up.
  • the second indoor unit (13) is provided with a second indoor fan (93) and a second internal temperature sensor (94).
  • the second indoor fan (93) is for sending indoor air to the second indoor heat exchanger (91).
  • the second inside air temperature sensor (94) is for detecting the temperature of the indoor air sent to the second indoor heat exchanger (91).
  • the second indoor circuit (90) housed in the second indoor unit (13) is provided with a temperature sensor.
  • the second indoor heat exchanger (91) is provided with a second indoor heat exchanger temperature sensor (95) for detecting the heat transfer tube temperature.
  • a second gas side temperature sensor (96) for detecting the temperature of the gas refrigerant flowing through the second indoor circuit (90) is provided. It is set up.
  • the refrigeration unit (14) is provided with a refrigeration fan (103) and a refrigeration temperature sensor (104).
  • the refrigeration fan (103) is for sending air in the refrigerator to the refrigeration heat exchanger (101).
  • the refrigeration temperature sensor (104) is for detecting the temperature of the air in the refrigerator sent to the refrigeration heat exchanger (101).
  • the refrigeration circuit (100) housed in the refrigeration unit (14) is provided with a temperature sensor.
  • the refrigerating heat exchanger (101) is provided with a refrigerating heat exchanger temperature sensor (105) for detecting the heat transfer tube temperature.
  • a refrigeration gas side temperature sensor (106) for detecting the temperature of the gas refrigerant flowing through the refrigeration circuit (100) is provided.
  • the high temperature side cascade circuit (110) housed in the cascade unit (15) is provided with a cascade outflow side temperature sensor (113).
  • the cascade outlet temperature sensor (113) is for detecting the temperature of the high-temperature side refrigerant flowing out of the primary side of the cascade heat exchanger (111).
  • the refrigeration unit (16) has a refrigeration fan (133) and a refrigeration temperature sensor (1). 34) are provided.
  • the refrigeration fan (133) is for sending air inside the refrigerator to the refrigeration heat exchanger (131).
  • the refrigeration temperature sensor (134) is for detecting the temperature of the air in the refrigerator sent to the refrigeration heat exchanger (131).
  • the refrigeration circuit (130) housed in the refrigeration unit (16) is provided with a temperature sensor.
  • the refrigeration heat exchanger (131) is provided with a refrigeration heat exchanger temperature sensor (135) for detecting the heat transfer tube temperature.
  • a refrigeration gas side temperature sensor (136) for detecting the temperature of the gas refrigerant flowing through the refrigeration circuit (130) is provided.
  • the outdoor unit (11) includes a controller (200).
  • the controller (200) controls the operation of the refrigeration system (10) in response to signals from the above sensors and command signals from a remote controller or the like. Specifically, the controller (200) controls the degree of opening of the outdoor expansion valve (34), switches the four-way switching valve (31), the gas release solenoid valve (65), the oil return solenoid valve (53), and the oil equalizer. Open and close the solenoid valve (55).
  • the controller (200) controls the capacity of the compressor unit (40).
  • the refrigeration system (10) includes a cooling operation for cooling the indoor air of the first indoor unit (12) and a heating operation for heating the indoor air of the first indoor unit (12). Change over to operate.
  • the second system (2) only the heat absorption operation for cooling the indoor air and the air in the refrigerator is performed.
  • the refrigerant in each of the high-temperature side refrigerant circuit (20) and the low-temperature side refrigerant circuit (25) circulates while changing phase, and a vapor compression refrigeration cycle is performed.
  • the outdoor heat exchanger (32) is used as the condensing unit, and the first indoor heat exchanger (81), the second indoor heat exchanger (91), and the heat for refrigeration are used.
  • the refrigeration cycle is performed using the heat exchanger (101) and the cascade heat exchanger (111) as evaporators.
  • a refrigeration cycle is performed using the cascade heat exchanger (111) as a condenser and the cooling / freezing heat exchanger (131) as an evaporator.
  • the four-way switching valve (31) is switched to the state shown by the solid line in FIG.
  • the first indoor expansion valve (82), the second indoor expansion valve (92), and the refrigeration expansion valve (1 02), the cascade expansion valve (112), and the refrigeration expansion valve (132) are set to a predetermined opening degree, and the outdoor expansion valve (34) is fully closed.
  • the oil return solenoid valve (53), the oil equalizing solenoid valve (55), the gas venting solenoid valve (65), and the liquid supply solenoid valve (69) are normally kept in the closed state. It is opened and closed as appropriate.
  • the high-temperature side refrigerant circuit (20) When the compressors (41, 42) of the compressor unit (40) are operated, the high-temperature side refrigerant compressed by the compressors (41, 42) is discharged to the discharge pipe (44).
  • the high-temperature side refrigerant flows into the outdoor heat exchanger (32) through the four-way switching valve (31).
  • the outdoor heat exchanger (32) In the outdoor heat exchanger (32), the high-temperature refrigerant radiates heat to the outdoor air and condenses.
  • the high-temperature side refrigerant condensed in the outdoor heat exchanger (32) flows into the first branch pipe (60a) of the inflow pipe (60), passes through the first inflow check valve (61a), and receives the receiver ( Three
  • the high-temperature side refrigerant of the receiver (33) flows into the outflow pipe (62). After that, the high-temperature side refrigerant is divided into two parts, one flows through the outflow check valve (63) to the first liquid side stop valve (35), and the other flows to the second liquid side stop valve (37). .
  • the high-temperature side refrigerant that has passed through the first liquid side shut-off valve (35) flows through the first system (1). That is, the high-temperature side refrigerant flows into the first indoor circuit (80) through the first liquid side communication pipe (21). In the first indoor circuit (80), the inflowing high-temperature side refrigerant is depressurized by the first indoor expansion valve (82) and then flows into the first indoor heat exchanger (81). In the first indoor heat exchanger (81), the high-temperature refrigerant absorbs heat from indoor air and evaporates. That is, indoor air is cooled in the first indoor heat exchanger (81).
  • the high-temperature side refrigerant that has passed through the second liquid side closing valve (37) flows through the second system (2).
  • the high-temperature side refrigerant flows into the second liquid-side communication pipe (23), and is then divided into three, and then flows into the second indoor circuit (90), the refrigeration circuit (100), or the high-temperature cascade circuit ( 110).
  • the high-temperature side refrigerant that has flowed into the second indoor circuit (90) is depressurized by the second indoor expansion valve (92), and then flows into the second indoor heat exchanger (91).
  • the high-temperature refrigerant absorbs heat from indoor air and evaporates. That is, the second indoor heat exchanger (91) Then, the indoor air is cooled.
  • the high-temperature side refrigerant that has flowed into the refrigeration circuit (100) flows into the refrigeration heat exchanger (101) after being depressurized by the refrigeration expansion valve (102).
  • the high-temperature side refrigerant absorbs heat from the air in the refrigerator and evaporates. That is, in the refrigeration heat exchanger (101), the air in the refrigerator is cooled.
  • the high-temperature side refrigerant flowing into the high-temperature side cascade circuit (110) flows into the cascade heat exchanger (111) after being depressurized by the cascade expansion valve (112).
  • the high-temperature refrigerant flowing through the primary side absorbs heat from the low-temperature refrigerant flowing through the secondary side and evaporates.
  • the low-temperature side refrigerant circuit (25) When the low temperature side compressor (121) is operated, the compressed low temperature side refrigerant is discharged from the low temperature side compressor (121). The low-temperature side refrigerant passes through the discharge-side check valve (122) and flows into the secondary side of the cascade heat exchanger (111). In the cascade heat exchanger (111), the low-temperature side refrigerant on the secondary side radiates heat to the high-temperature side refrigerant on the primary side and condenses. The low-temperature refrigerant condensed in the cascade heat exchanger (111) flows into the receiver (123). Thereafter, the low-temperature side refrigerant flows out of the receiver (123) and flows into the refrigeration circuit (130) through the third liquid side communication pipe (26).
  • the inflowing low-temperature side refrigerant is depressurized by the refrigeration expansion valve (132) and then flows into the refrigeration heat exchanger (131).
  • the low-temperature refrigerant absorbs heat from the air in the freezer and evaporates. In other words, in the freezing heat exchanger (131), the air in the freezer is cooled.
  • the low-temperature refrigerant evaporated in the refrigeration heat exchanger (131) flows through the third gas-side communication pipe (27) to the low-temperature cascade circuit (120). Enter. Thereafter, the low-temperature side refrigerant is sucked into the low-temperature side compressor (121).
  • the low-temperature side compressor (121) compresses the sucked low-temperature side refrigerant and discharges it again. In the low-temperature side refrigerant circuit (25), the circulation of such low-temperature side refrigerant is repeated.
  • the first indoor heat exchanger (81) is used as a condenser, the outdoor heat exchanger (32), the second indoor heat exchanger (91), and heat exchange for refrigeration.
  • the cascade heat exchanger (111) are used as evaporators to perform the refrigeration cycle.
  • a refrigeration cycle is performed using the cascade heat exchanger (111) as a condenser and the cooling / freezing heat exchanger (131) as an evaporator.
  • the operation of the low-temperature side refrigerant circuit (25) is the same as in the cooling operation.
  • the four-way switching valve (31) is switched to the state shown by the broken line in FIG.
  • the oil return solenoid valve (53), oil equalizing solenoid valve (55), degassing solenoid valve (65), and liquid supply solenoid valve (69) are normally kept in a closed state. It is opened and closed appropriately.
  • the compressed high-temperature side refrigerant is discharged from the compressors (41, 42) to the discharge pipe (44).
  • the discharged high-temperature side refrigerant passes through the four-way switching valve (31) and flows through the first system (1). That is, the discharged high-temperature side refrigerant flows into the first indoor circuit (80) through the first gas side communication pipe (22).
  • the high-temperature side refrigerant flowing into the first indoor circuit (80) radiates heat to indoor air in the first indoor heat exchanger (81) and condenses. In the first indoor heat exchanger (81), the indoor air is heated by the heat radiation of the high-temperature side refrigerant.
  • the high-temperature side refrigerant condensed in the first indoor heat exchanger (81) passes through the first indoor expansion valve (82), flows through the first liquid side communication pipe (21), and returns to the outdoor unit (11).
  • the high-temperature side refrigerant returned to the outdoor unit (11) passes through the first liquid side closing valve (35) and flows into the second branch pipe (60b) of the inflow pipe (60).
  • This high-temperature side refrigerant passes through the second inflow check valve (61b) and flows into the receiver (33).
  • the high-temperature side refrigerant of the receiver (33) flows from the receiver (33) into the outflow pipe (62). After that, the high temperature refrigerant is split into two parts, One flows into the first branch pipe (62a) of the outflow pipe (62), and the other flows into the second branch pipe (62b) of the outflow pipe (62).
  • the outdoor heat exchanger (32) the high-temperature refrigerant absorbs heat from outdoor air and evaporates.
  • the evaporated high-temperature side refrigerant passes through the four-way switching valve (31) and flows into the suction pipe (43).
  • the high-temperature side refrigerant flowing into the second branch pipe (62b) of the outflow pipe (62) flows through the second system as in the cooling operation.
  • the high-temperature side refrigerant flows out of the receiver (33), flows through the second liquid-side communication pipe (23), and is divided and diverted to the second indoor circuit (90), the refrigeration circuit (100), or the high-temperature side. It is sent to the cascade circuit (110).
  • the high-temperature side refrigerant flowing into the second indoor circuit (90) absorbs heat from indoor air in the second indoor heat exchanger (91) and evaporates.
  • the high-temperature side refrigerant that has flowed into the refrigeration circuit (100) absorbs heat from the air in the refrigerator in the refrigeration heat exchanger (101) and evaporates.
  • the high-temperature-side refrigerant flowing into the high-temperature-side cascade circuit (110) absorbs heat from the air in the refrigerator in the cascade heat exchanger (111) and evaporates.
  • the high-temperature side refrigerant evaporated in the second indoor heat exchanger (91), the refrigeration heat exchanger (101), or the cascade heat exchanger (111) joins in the second gas-side communication pipe (24) to become outdoor. Return to the unit (11), pass through the second gas side shutoff valve (38), and flow into the suction pipe (43).
  • the high-temperature solvent evaporated in the outdoor heat exchanger (32) and the second indoor heat exchanger (91), the refrigeration heat exchanger (101), or the cascade heat exchanger (111) The high-temperature side refrigerant evaporated in the step merges.
  • the joined high-temperature side refrigerant is sucked into the compressors (41, 42) of the compressor unit (40).
  • These compressors (41, 42) compress the sucked high-temperature side refrigerant and discharge it again.
  • such circulation of the high-temperature side refrigerant is repeated.
  • the indoor air is heated in the first indoor heat exchanger (81) by utilizing the heat absorbed by the high-temperature side refrigerant from the indoor air or the indoor air in the cascade heat exchanger (111).
  • the outdoor heat exchanger (32), the second indoor heat exchanger (91), The amount of heat absorbed by the high-temperature refrigerant in the storage heat exchanger (101) and the cascade heat exchanger (111) may exceed the amount of heat released by the high-temperature refrigerant in the first indoor heat exchanger (81). possible.
  • the outdoor expansion valve (34) is fully closed to shut off the flow of the high-temperature side refrigerant toward the outdoor heat exchanger (32). That is, the second indoor heat exchanger (91), the refrigeration heat exchanger (101), and the cascade heat exchanger (111) are used as evaporators to reduce the amount of heat absorbed by the high-temperature side refrigerant.
  • the first system (1) and the second system (2) are separately connected to the outdoor unit (11), the first system (1) and the second system (2) are connected. As a result, it is possible to use existing usage units. Therefore, according to the present embodiment, versatility as the refrigeration apparatus (10) can be improved.
  • the present invention may be configured such that the cascade unit (15) and the refrigeration unit (16) are omitted from the above embodiment, and only the high-temperature side refrigerant circuit (20) is provided.
  • the second indoor unit (13) may be omitted.
  • first indoor unit (12), the second indoor unit (13), the refrigerating unit (14), and the freezing unit (16) may be provided in a plurality.
  • the present invention is useful for a heat source unit to which a plurality of utilization units are connected and a refrigeration apparatus including the heat source unit.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Compression-Type Refrigeration Machines With Reversible Cycles (AREA)

Abstract

L'invention concerne une unité de source de chaleur (11) comprenant une première partie de système (47) dont la partie d'extrémité est formée de manière à être reliée à un premier système (1) qui peut commuter entre un mode endothermique et un mode de rayonnement thermique et une seconde partie de système (48) dont la partie d'extrémité est configurée de manière à être reliée à un second système (2) qui met en route uniquement le mode endothermique, dans lequel le côté liquide du premier système (47) est relié à un échangeur de chaleur extérieur (32) et le côté gaz est relié au compresseur (41, 42) de manière à pouvoir commuter entre les côtés d'alimentation et d'admission. Le côté liquide du second système (48) est relié à l'échangeur de chaleur extérieur (32) alors que le côté gaz est relié aux parties d'admission des compresseurs (41, 42).
PCT/JP2001/010759 2000-12-08 2001-12-07 Unite de source de chaleur pour refrigerateur et refrigerateur WO2002046666A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2002221092A AU2002221092A1 (en) 2000-12-08 2001-12-07 Heat source unit for refrigerator and refrigerator

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2000-375187 2000-12-08
JP2000375187A JP2002181406A (ja) 2000-12-08 2000-12-08 冷凍装置及び冷凍装置用熱源ユニット

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WO2002046666A1 true WO2002046666A1 (fr) 2002-06-13

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WO (1) WO2002046666A1 (fr)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3956784B2 (ja) 2002-07-04 2007-08-08 ダイキン工業株式会社 冷凍装置
JP3775358B2 (ja) * 2002-07-12 2006-05-17 ダイキン工業株式会社 冷凍装置

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4944156A (en) * 1987-12-23 1990-07-31 Mitsubishi Denki Kabushiki Kaisha Air conditioning system into which a refrigerator or a warming cabinet is integrated, and power source circuit therefor
JP2815960B2 (ja) * 1990-02-20 1998-10-27 三洋電機株式会社 空気調和装置

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS616578A (ja) * 1984-05-29 1986-01-13 ミサワホ−ム株式会社 複合型ヒートポンプ装置
JPH02183769A (ja) * 1987-12-23 1990-07-18 Mitsubishi Electric Corp 冷蔵又は温蔵庫一体形空気調和装置並びにその電源回路
JP2000240980A (ja) * 1999-02-23 2000-09-08 Fuji Electric Co Ltd 冷凍空調装置

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4944156A (en) * 1987-12-23 1990-07-31 Mitsubishi Denki Kabushiki Kaisha Air conditioning system into which a refrigerator or a warming cabinet is integrated, and power source circuit therefor
JP2815960B2 (ja) * 1990-02-20 1998-10-27 三洋電機株式会社 空気調和装置

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JP2002181406A (ja) 2002-06-26

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