US20110185765A1 - Heat pump apparatus - Google Patents

Heat pump apparatus Download PDF

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Publication number
US20110185765A1
US20110185765A1 US13/063,637 US201013063637A US2011185765A1 US 20110185765 A1 US20110185765 A1 US 20110185765A1 US 201013063637 A US201013063637 A US 201013063637A US 2011185765 A1 US2011185765 A1 US 2011185765A1
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United States
Prior art keywords
refrigerant
evaporator
condenser
heat pump
pump apparatus
Prior art date
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Abandoned
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US13/063,637
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English (en)
Inventor
Kenichiro Nishii
Kenji Ueda
Kazuki Wazima
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Mitsubishi Heavy Industries Ltd
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Mitsubishi Heavy Industries Ltd
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Filing date
Publication date
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Assigned to MITSUBISHI HEAVY INDUSTRIES, LTD. reassignment MITSUBISHI HEAVY INDUSTRIES, LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: NISHI, KENICHIRO, UEDA, KENJI, WAZIMA, KAZUKI
Publication of US20110185765A1 publication Critical patent/US20110185765A1/en
Abandoned legal-status Critical Current

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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
    • F25B30/00—Heat pumps
    • F25B30/02—Heat pumps of the compression type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
    • F25B43/006—Accumulators
    • 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
    • F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
    • F25B43/02—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat for separating lubricants from the refrigerant
    • 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
    • F25B1/04—Compression machines, plants or systems with non-reversible cycle with compressor of rotary type
    • F25B1/053—Compression machines, plants or systems with non-reversible cycle with compressor of rotary type of turbine type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D23/00—General constructional features
    • F25D23/006—General constructional features for mounting refrigerating machinery components

Definitions

  • the present invention relates to a heat pump apparatus, in particular, to a heat pump apparatus employing a centrifugal chiller.
  • a shell-and-tube heat exchanger for example, has been employed as a heat exchanger for a centrifugal chiller employed in a heat pump apparatus.
  • a compressor is typically disposed at a top portion of the heat exchanger or at a side surface thereof (for example, see Patent Literature 1).
  • a shell-and-tube heat exchanger typically is a cylindrical container, which is known to be an advantageous shape for reducing the wall thickness thereof, as a container for storing a high-pressure refrigerant.
  • the present invention has been conceived in light of the above-described circumstances, and an object thereof is to provide a heat pump apparatus that is capable of suppressing an increase in the installation area therefor and the volume thereof.
  • the present invention employs the following solutions.
  • a heat-pump apparatus of the present invention is a heat pump provided with a compressor that compresses refrigerant; a condenser that liquefies the compressed refrigerant; and an evaporator that evaporates the liquefied refrigerant, wherein the condenser and the evaporator are plate-type heat exchangers.
  • the plate-type heat exchangers that can be formed in a rectangular cuboid shape, it becomes less likely that a gap is formed between the condenser and the evaporator and other components, when arranging the other components of the heat pump apparatus. Because of this, it is possible to suppress an increase in the installation area for and volume of the heat pump apparatus.
  • a controller that controls driving of the centrifugal compressor; an oil separator that separates refrigerant discharged from the centrifugal compressor from lubricating oil; and a gas-liquid separator into which the refrigerant that has flowed out from the evaporator flows, that separates gas refrigerant and liquid refrigerant, and that supplies the evaporator only with the gas refrigerant, wherein the condenser and the evaporator are disposed next to each other, and the oil separator is disposed on the same plane as the condenser and the evaporator; the controller is disposed above one of the condenser and the evaporator; the gas-liquid separator is disposed above the other one of the condenser and the evaporator; and the centrifugal compressor is disposed above the oil separator.
  • the gas-liquid separator above the other one of the condenser and the evaporator, the refrigerant inside the gas-liquid separator flows into the evaporator when the heat pump apparatus is stopped; therefore, it is possible to prevent the refrigerant from accumulating in the gas-liquid separator.
  • the centrifugal compressor By disposing the centrifugal compressor above the oil separator, in other words, by disposing the oil separator below the centrifugal compressor, the refrigerant inside the centrifugal compressor flows into the oil separator when the heat pump apparatus is stopped; therefore, it is possible to prevent the refrigerant from accumulating in the centrifugal compressor.
  • FIG. 1 is a schematic diagram for explaining the circuit configuration in a heat pump apparatus according to an embodiment of the present invention.
  • FIG. 2 is a front view for explaining the internal arrangement of the heat pump apparatus in FIG. 1 .
  • FIG. 3 is a right side view for explaining the internal arrangement of the heat pump apparatus in FIG. 2 .
  • FIG. 4 is a left side view for explaining the internal arrangement of the heat pump apparatus in FIG. 2 .
  • FIG. 5 is a top view for explaining the internal arrangement of the heat pump apparatus in FIG. 2 .
  • FIG. 6 is a back view for explaining the internal arrangement of the heat pump apparatus in FIG. 2 .
  • FIG. 7 is a front view for explaining the external appearance of the heat pump apparatus in FIG. 1 .
  • FIG. 8 is a right side view for explaining the external appearance of the heat pump apparatus in FIG. 7 .
  • FIG. 9 is a left side view for explaining the external appearance of the heat pump apparatus in FIG. 7 .
  • FIG. 10 is a top view for explaining the external appearance of the heat pump apparatus in FIG. 7 .
  • FIGS. 1 to 10 A heat pump apparatus according to an embodiment of the present invention will be described with reference to FIGS. 1 to 10 .
  • FIG. 1 is a schematic diagram for explaining the circuit configuration in a heat pump apparatus according to this embodiment.
  • a heat pump apparatus 1 is formed in a substantially rectangular cuboid shape and provides hot water by receiving a heat-source water supply.
  • the heat pump 1 is mainly provided with a condenser 2 , an expansion valve 3 , an evaporator 4 , a centrifugal compressor 5 , an inverter (controller) 6 , an oil-mist separating tank (oil separator) 7 , and an oil tank 8 .
  • FIG. 2 is a front view for explaining the internal arrangement of the heat pump apparatus in FIG. 1 .
  • FIG. 3 is a right side view for explaining the internal arrangement of the heat pump apparatus in FIG. 2 .
  • FIG. 4 is a left side view for explaining the internal arrangement of the heat pump apparatus in FIG. 2 .
  • FIG. 5 is a top view for explaining the internal arrangement of the heat pump apparatus in FIG. 2 .
  • FIG. 6 is a back view for explaining the internal arrangement of the heat pump apparatus in FIG. 2 .
  • the condenser 2 is a plate-type heat exchanger formed in a substantially rectangular cuboid shape and condenses a high-temperature, high-pressure refrigerant discharged from the centrifugal compressor 5 .
  • the condenser 2 performs heat exchange between the refrigerant and hot water to liquefy the refrigerant as well as to heat the hot water.
  • One end portion of the condenser 2 is connected to a discharge port of the centrifugal compressor 5 via the oil-mist separating tank 7 in a manner that allows the refrigerant to flow in communication therewith, and the other end portion thereof is connected to the expansion valve 3 via an economizer 9 in a manner that allows the refrigerant to flow in communication therewith.
  • the condenser 2 is disposed at an end portion on the back side (right side in FIG. 3 ) at one end side (left end portion in FIG. 6 ) of a rectangularly formed base portion F 1 in a longitudinal direction (left-right direction in FIG. 6 ) and is disposed next to the evaporator 4 .
  • the condenser 2 is disposed at a position that is above the base portion F 1 , below the accumulator 10 , and next to the oil-mist separating tank 7 in the longitudinal direction described above and is disposed at a position that is next to the evaporator 4 in a direction perpendicular to the longitudinal direction.
  • a hot-water inlet 21 into which hot water that has not yet been heated at the condenser 2 flows is provided at the bottom thereof, and a hot-water outlet 22 from which hot water that has been heated at the condenser 2 flows out is provided at the top thereof.
  • the economizer 9 is a heat exchanger formed in a substantially circular-columnar shape that further cools the refrigerant that has flowed out from the condenser 2 .
  • One end portion of the economizer 9 is connected to the condenser 2 in a manner that allows the refrigerant to flow in communication therewith, and the other end portion thereof is connected to the expansion valve 3 in a manner that allows the refrigerant to flow in communication therewith.
  • the economizer 9 is disposed at an end portion on the front side (left side in FIG. 3 ) at one end portion (right end portion in FIG. 2 ) of the heat pump apparatus 1 at its middle section.
  • the economizer 9 is disposed at a position that is above the evaporator 4 , below the inverter 6 , next to an oil tank 8 in a longitudinal direction, and next to the accumulator 10 in a direction perpendicular to the longitudinal direction.
  • the expansion valve 3 is a valve that causes the refrigerant supplied from the condenser 2 via the economizer 9 to adiabatically expand, thereby lowering the pressure thereof.
  • One end portion of the expansion valve 3 is connected to the economizer 9 in a manner that allows the refrigerant to flow in communication therewith, and the other end portion thereof is connected to the evaporator 4 in a manner that allows the refrigerant to flow in communication therewith.
  • expansion valve 3 a known unit may be employed as the expansion valve 3 ; it is not particularly limited.
  • the evaporator 4 is a plate-type heat exchanger formed in a substantially rectangular cuboid shape and evaporates the refrigerant that has been adiabatically expanded by the expansion valve 3 .
  • the evaporator 4 gasifies the refrigerant by giving the heat of the heat-source water to the refrigerant.
  • One end portion of the evaporator 4 is connected to the expansion valve 3 in a manner that allows the refrigerant to flow in communication therewith, and the other end portion thereof is connected to an intake port of the centrifugal compressor 5 via the accumulator (gas-liquid separator) 10 .
  • the evaporator 4 is disposed on an end portion on the front side (left side in FIG. 3 ) at one end side (right end portion in FIG. 2 ) of the rectangularly formed base portion F 1 in a longitudinal direction (left-right direction in FIG. 2 ) and is disposed next to the condenser 2 . Furthermore, the evaporator 4 is disposed closer to the center of the heat pump apparatus 1 (closer to left end in FIG. 2 ) as compared with the condenser 2 .
  • the evaporator 2 is disposed at a position that is above the base portion F 1 , below the economizer 9 , next to an control panel 11 in the longitudinal direction, and next to the condenser 2 and the oil-mist separating tank 7 in a direction perpendicular to the longitudinal direction.
  • a heat-source-water inlet 41 into which heat-source water whose heat has not yet been absorbed at the evaporator 4 flows is provided at the top thereof, and a heat-source-water outlet 42 from which heat-source water whose heat has been absorbed at the evaporator 4 flows out is provided at the bottom thereof.
  • the control panel 11 is where control devices for controlling various devices in the heat pump apparatus 1 are integrated and has a substantially rectangular cuboid housing in which the control devices, etc. are accommodated.
  • control panel 11 is disposed at the other end portion (left end portion in FIG. 2 ) of the rectangularly formed base portion Fl in the longitudinal direction.
  • control panel 11 is disposed at a position that is above the base portion F 1 , below the oil tank 8 , and next to the evaporator 4 and the oil-mist separating tank 7 in the longitudinal direction.
  • the accumulator 10 is formed in a substantially circular-columnar shape and separates liquid refrigerant and gas refrigerant contained in the refrigerant that has flowed out from the evaporator 4 to supply the centrifugal compressor 5 only with the gas refrigerant.
  • One end portion of the accumulator 10 is connected to the evaporator 4 in a manner that allows the refrigerant to flow in communication therewith, and the other end portion thereof is connected to the centrifugal compressor 5 in a manner that allows the refrigerant to flow in communication therewith.
  • the accumulator 10 is disposed at one end portion (left end portion in FIG. 6 ) of a position extending over the top portion (top portion in FIG. 6 ) and the middle portion of the heat pump apparatus 1 on the back side (top side in FIG. 5 ) thereof.
  • the accumulator 10 is disposed at a position that is above the condenser 2 , next to the centrifugal compressor 5 in the longitudinal direction, and next to the economizer 9 and the inverter 6 in the direction perpendicular to the longitudinal direction.
  • a known unit may be used as the accumulator 10 ; it is not particularly limited.
  • the centrifugal compressor 5 takes in the refrigerant that has been gasified at the evaporator 4 via the accumulator 10 and discharges it into the condenser 2 via the oil-mist separating tank 7 after compressing it.
  • the intake port thereof into which the refrigerant flows is connected to the evaporator 4 via the accumulator 10
  • the discharge port thereof from which the refrigerant flows out is connected to the condenser 2 via the oil-mist separating tank 7 .
  • the centrifugal compressor 5 is integrally configured with an electric motor 51 that supplies a rotational driving force, and power supplied from the inverter 6 rotationally drives the electric motor 51 and controls the rotational speed thereof.
  • the centrifugal compressor 5 and the electric motor 51 are disposed at the other end portion (right end portion in FIG. 6 ) at the top portion (top portion in FIG. 6 ) of the heat pump apparatus 1 on the back side (top side in FIG. 5 ) thereof.
  • centrifugal compressor 5 and the electric motor 51 are disposed at positions that are above the oil-mist separating tank 7 and the oil tank 8 and that are next to the inverter 6 in the longitudinal direction.
  • centrifugal compressor 5 and the electric motor 51 ; they are not particularly limited.
  • the invert 6 supplies power to the electric motor 51 , controls the rotational speed of the electric motor 51 , and has a housing formed in a substantially rectangular cuboid shape.
  • the inverter 6 is disposed at one end portion (right side portion in FIG. 2 ) at the top portion (top portion in FIG. 2 ) of the heat pump apparatus 1 on the front side (bottom side in FIG. 5 ) thereof.
  • the inverter 6 is disposed at a position that is above the economizer 9 and next to the accumulator 10 , the centrifugal compressor 5 , and the electric motor 51 in the direction perpendicular to the longitudinal direction.
  • inverter 6 a known unit may be employed as the inverter 6 ; it is not particularly limited.
  • the oil-mist separating tank 7 is formed in a substantially circular-columnar shape and separates lubricating oil and lubricating oil mist contained in the refrigerant discharged from the centrifugal compressor 5 from the refrigerant.
  • One end portion of the oil-mist separating tank 7 is connected to the discharge port of the centrifugal compressor 5 in a manner that allows the refrigerant to flow in communication therewith, and the other end portion thereof is connected to the condenser 2 .
  • the oil-mist separating tank 7 supplies the lubricating oil separated from the refrigerant to the oil tank 8 .
  • the oil-mist separating tank 7 is disposed at an end portion on the back side at the other end portion (right end portion in FIG. 6 ) of the base portion F 1 .
  • the oil-mist separating tank 7 is disposed at a position that is above the base portion F 1 , below the centrifugal compressor 5 and the electric motor 51 , and next to the evaporator 4 in the direction perpendicular to the longitudinal direction.
  • oil-mist separating tank 7 a known unit may be used as the oil-mist separating tank 7 ; it is not particularly limited.
  • the oil tank 8 is formed in a substantially circular-columnar shape, stores the lubricating oil used to lubricate the centrifugal compressor 5 , supplies the lubricating oil to the centrifugal compressor 5 , and is where the lubricating oil discharged from the centrifugal compressor 5 flows into.
  • the oil tank 8 is connected to the centrifugal compressor 5 so that the lubricating oil can be supplied thereto and received therefrom and is connected the oil-mist separating tank 7 so that the lubricating oil is supplied therefrom.
  • the oil tank 8 is disposed at the other end portion (left end portion in FIG. 2 ) at the middle section of the heat pump apparatus 1 .
  • the oil tank 8 is disposed at a position that is above the control panel 11 , below the electric motor 51 , and next to the economizer 9 in the longitudinal direction.
  • the heat pump apparatus 1 is provided with the base portion F 1 , vertical main frames F 2 , horizontal main frames F 3 , vertical sub-frames F 4 , and horizontal sub-frames F 5 for supporting the condenser 2 , the evaporator 4 , the centrifugal compressor 5 , the inverter 6 , and so on.
  • the base portion F 1 is a member that supports all other components that constitute the heat pump apparatus 1 in which rod-like members formed of metal are combined into a substantially rectangular shape.
  • the condenser 2 , the evaporator 4 , the oil-mist separating tank 7 , and the control panel 11 are disposed at a top surface of the base portion F 1 , and a plurality of the vertical main frames F 2 and the vertical sub-frames F 4 are mounted thereto.
  • the vertical main frames F 2 are rod-like members that extend from the base portion F 1 to the top end of the heat pump apparatus 1 and that support other components together with the horizontal main frames F 3 and the base portion F 1 , when the heat pump apparatus 1 is hoisted.
  • two vertical main frames F 2 each are disposed at pair of long sides at positions separated from the center of each long side by a predetermined distance.
  • each of the four vertical main frames F 2 is provided with a hoisting lug 12 at the top end thereof.
  • the horizontal main frames F 3 are rod-like members that extend between the vertical main frames F 2 along short sides of the base portion F 1 and that connect the vertical main frames F 2 disposed at one long side and the vertical main frames F 2 disposed at the other long side.
  • the horizontal main frames F 3 constitute ladder-like structures together with the vertical main frames F 2 .
  • the horizontal main frames F 3 together with the vertical main frames F 2 , support the inverter 6 , the centrifugal compressor 5 , the electric motor 51 , and the oil tank 8 .
  • two horizontal main frames F 3 are disposed between the vertical main frames F 2 disposed at one long side and the vertical main frames F 2 disposed at the other long side. That is, four horizontal main frames F 3 are provided in the heat pump apparatus 1 as a whole.
  • the upper horizontal main frames F 3 are disposed below the inverter 6 , the centrifugal compressor 5 , and the electric motor 51 , and above the economizer 9 .
  • the lower horizontal main frames F 3 are disposed below the economizer 9 and above the evaporator 4 and the condenser 2 .
  • the vertical sub-frames F 4 together with the horizontal sub-frames F 5 , support the accumulator 10 , the economizer 9 , and so on.
  • the vertical sub-frames F 4 are rod-like members that extend upward from the base portion F 1 and that extend up to a space above the condenser 2 and the evaporator 4 and below the accumulator 10 and the economizer 9 .
  • the horizontal sub-frames F 5 together with the vertical sub-frames F 4 , support the accumulator 10 , the economizer 9 , and so on.
  • the vertical sub-frames F 4 are rod-like members that extend in a direction substantially perpendicular to the vertical sub-frames F 4 and that are disposed at a space above the condenser 2 and the evaporator 4 and below the accumulator 10 and the economizer 9 .
  • FIG. 7 is a front view for explaining the external appearance of the heat pump apparatus in FIG. 1 .
  • FIG. 8 is a right side view for explaining the external appearance of the heat pump apparatus in FIG. 7 .
  • FIG. 9 is a left side view for explaining the external appearance of the heat pump apparatus in FIG. 7 .
  • FIG. 10 is a top view for explaining the external appearance of the heat pump apparatus in FIG. 7 .
  • the heat pump apparatus 1 is provided with outer plates 13 that internally accommodate the condenser 2 , the evaporator 4 , the centrifugal compressor 5 , the vertical main frames F 2 , the horizontal main frames F 3 , the vertical sub-frames F 4 , the horizontal sub-frames F 5 , and so on.
  • the hoisting lugs 12 used when transporting the heat pump apparatus 1 are externally exposed at the top portion of the heat pump apparatus 1 .
  • the hoisting lugs 12 are members that are fixed to the top ends of the vertical main frames F 2 , and the force that acts on the hoisting lugs 12 when the heat pump apparatus 1 is hoisted is transmitted to the horizontal main frames F 3 and the base portion F 1 via the vertical main frames F 2 .
  • the heat-source-water inlet 41 , the heat-source-water outlet 42 , the hot-water inlet 21 , and the hot-water outlet 22 externally protrude at the bottom of one end portion (right end portion in FIG. 7 ) of the heat pump apparatus 1 .
  • a power unit 14 to which power is externally supplied is disposed at the top of the one end portion.
  • the power supplied to the power unit 14 is used to operate the heat pump apparatus 1 and is supplied, in particular, to the electric motor 51 via the inverter 6 .
  • control panel 11 is externally exposed at the bottom of the other end portion (left end portion in FIG. 7 ) of the heat pump apparatus 1 .
  • a high-temperature, high-pressure gas refrigerant compressed at the centrifugal compressor 5 is discharged from the discharge port of the centrifugal compressor 5 and flows into the oil-mist separating tank 7 .
  • lubricating oil mist contained in the refrigerant is separated from the refrigerant.
  • the refrigerant from which the lubricating oil mist has been separated flows into the condenser 2 from the oil-mist separating tank 7 .
  • heat exchange is performed between the high-temperature refrigerant and externally supplied hot water of, for example, about 75° C.
  • the hot water turns into hot water of, for example, about 80° C. upon absorbing heat from the high-temperature refrigerant and flows out from the condenser 2 to the outside.
  • the refrigerant liquefied at the condenser 2 flows out from the condenser 2 to flow into the economizer 9 .
  • part of the refrigerant that has flowed thereinto is diverted and adiabatically expanded to generate low-temperature, low-pressure refrigerant. Then, heat exchange is performed between the diverted low-temperature refrigerant and the rest of the refrigerant to further cool the rest of the refrigerant.
  • the diverted refrigerant flows into the intake port of the centrifugal compressor 5 .
  • the refrigerant cooled at the economizer 9 flows toward the expansion valve 3 , is adiabatically expanded when passing through the expansion valve 3 , and turns into a low-temperature, low-pressure liquid refrigerant.
  • the adiabatically expanded refrigerant flows into the evaporator 4 .
  • heat exchange is performed between the low-temperature refrigerant and externally supplied heat-source water of, for example, about 45° C.
  • the low-temperature refrigerant evaporates, thus being gasified.
  • the heat-source water turns into heat-source water of, for example, about 40° C. upon releasing heat to the low-temperature refrigerant and flows out from the evaporator 4 to the outside.
  • the evaporated gas refrigerant flows into the accumulator 10 from the evaporator 4 .
  • liquid refrigerant that has flowed out from the evaporator 4 together with the gas refrigerant is separated from the gas refrigerant, and only the gas refrigerant flows out from the accumulator 10 .
  • the gas refrigerant from which the liquid refrigerant has been separated at the accumulator 10 flows into the intake port of the centrifugal compressor 5 , is compressed by the centrifugal compressor 5 , and is discharged again from the discharge port thereof as a high-pressure refrigerant, and thus the above-described cycle is repeated.
  • the lubricating oil is supplied to the centrifugal compressor 5 from the oil tank 8 , and the lubricating oil is used for lubricating sliding parts in the centrifugal compressor 5 .
  • the lubricating oil that has been used for lubrication is returned to the oil tank 8 from the centrifugal compressor 5 and is supplied again to the centrifugal compressor 5 from the oil tank 8 .
  • part of the lubricating oil that has been used in the centrifugal compressor 5 for lubrication flows toward the oil-mist separating tank 7 together with the refrigerant.
  • the lubricating oil that has flowed out is separated from the refrigerant at the oil-mist separating tank 7 .
  • the lubricating oil separated from the refrigerant is returned to the oil tank 8 from the oil-mist separating tank 7 .
  • the accumulator 10 Furthermore, by disposing the accumulator 10 above the condenser 2 , the refrigerant that has accumulated inside the accumulator 10 flows into the evaporator 4 when the heat pump apparatus 1 is stopped; therefore, it is possible to prevent the refrigerant from accumulating in the accumulator 10 .
  • the centrifugal compressor 5 By disposing the centrifugal compressor 5 above the oil-mist separating tank 7 , in other words, by disposing the oil-mist separating tank 7 below the centrifugal compressor 5 , the refrigerant inside the centrifugal compressor 5 flows into the oil-mist separating tank 7 when the heat pump apparatus 1 is stopped; therefore, it is possible to prevent the refrigerant from accumulating in the centrifugal compressor 5 .
US13/063,637 2009-03-12 2010-03-09 Heat pump apparatus Abandoned US20110185765A1 (en)

Applications Claiming Priority (3)

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JP2009060177A JP5386201B2 (ja) 2009-03-12 2009-03-12 ヒートポンプ装置
JP2009-060177 2009-03-12
PCT/JP2010/053842 WO2010104057A1 (ja) 2009-03-12 2010-03-09 ヒートポンプ装置

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US20130255308A1 (en) * 2012-03-29 2013-10-03 Johnson Controls Technology Company Chiller or heat pump with a falling film evaporator and horizontal oil separator
US10443912B2 (en) 2013-10-25 2019-10-15 Mitsubishi Heavy Industries Thermal Systems, Ltd. Refrigerant circulation device, method for circulating refrigerant and acid suppression method
US10465959B2 (en) 2013-10-25 2019-11-05 Mitsubishi Heavy Industries Thermal Systems, Ltd. Refrigerant circulation device, method for circulating refrigerant and method for suppressing isomerization
US11408654B2 (en) 2015-12-10 2022-08-09 Carrier Corporation Economizer and refrigeration system having the same

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JP5737918B2 (ja) * 2010-12-03 2015-06-17 三菱重工業株式会社 生物処理方式による排水処理設備用ヒートポンプシステム、及びこれを備えた生物処理方式による排水処理設備、並びに、生物処理方式による排水処理設備用ヒートポンプシステムの制御方法
JP5468532B2 (ja) * 2010-12-14 2014-04-09 株式会社コロナ ヒートポンプ装置
JP5891614B2 (ja) * 2011-06-27 2016-03-23 株式会社Ihi 廃熱発電装置
JP5916360B2 (ja) 2011-11-30 2016-05-11 三菱重工業株式会社 ターボ冷凍機
JP7313796B2 (ja) * 2018-01-12 2023-07-25 三菱重工サーマルシステムズ株式会社 熱交換ユニット
US20230117931A1 (en) * 2021-10-15 2023-04-20 Hamilton Sundstrand Corporation Integrated supplemental cooling unit

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JP5386201B2 (ja) 2014-01-15

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