WO2008062839A1 - Appareillage pour fluide - Google Patents

Appareillage pour fluide Download PDF

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Publication number
WO2008062839A1
WO2008062839A1 PCT/JP2007/072576 JP2007072576W WO2008062839A1 WO 2008062839 A1 WO2008062839 A1 WO 2008062839A1 JP 2007072576 W JP2007072576 W JP 2007072576W WO 2008062839 A1 WO2008062839 A1 WO 2008062839A1
Authority
WO
WIPO (PCT)
Prior art keywords
casing
fluid machine
expansion mechanism
refrigerant
side mounting
Prior art date
Application number
PCT/JP2007/072576
Other languages
English (en)
Japanese (ja)
Inventor
Eiji Kumakura
Katsumi Sakitani
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 EP07832306.0A priority Critical patent/EP2098730B1/fr
Priority to ES07832306.0T priority patent/ES2536770T3/es
Publication of WO2008062839A1 publication Critical patent/WO2008062839A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C11/00—Combinations of two or more machines or pumps, each being of rotary-piston or oscillating-piston type; Pumping installations
    • F04C11/001—Combinations of two or more machines or pumps, each being of rotary-piston or oscillating-piston type; Pumping installations of similar working principle
    • F04C11/003—Combinations of two or more machines or pumps, each being of rotary-piston or oscillating-piston type; Pumping installations of similar working principle having complementary function
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C1/00—Rotary-piston machines or engines
    • F01C1/30—Rotary-piston machines or engines having the characteristics covered by two or more groups F01C1/02, F01C1/08, F01C1/22, F01C1/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
    • F01C1/32—Rotary-piston machines or engines having the characteristics covered by two or more groups F01C1/02, F01C1/08, F01C1/22, F01C1/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having both the movement defined in group F01C1/02 and relative reciprocation between the co-operating members
    • F01C1/322—Rotary-piston machines or engines having the characteristics covered by two or more groups F01C1/02, F01C1/08, F01C1/22, F01C1/24 or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having both the movement defined in group F01C1/02 and relative reciprocation between the co-operating members with vanes hinged to the outer member and reciprocating with respect to the outer member
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C21/00—Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
    • F01C21/10—Outer members for co-operation with rotary pistons; Casings
    • F01C21/104—Stators; Members defining the outer boundaries of the working chamber
    • F01C21/108—Stators; Members defining the outer boundaries of the working chamber with an axial surface, e.g. side plates
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C23/00—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
    • F04C23/008—Hermetic pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2230/00—Manufacture
    • F04C2230/60—Assembly methods

Definitions

  • the present invention relates to a fluid machine housed in a casing having a compression mechanism and an expansion mechanism.
  • a fluid machine in which an expansion mechanism, an electric motor, and a compression mechanism are connected by a single rotating shaft is known.
  • power is generated in the expansion mechanism by expansion of the introduced fluid.
  • the power generated by the expansion mechanism is transmitted to the compression mechanism by the rotating shaft together with the power generated by the electric motor.
  • the compression mechanism is driven by the power transmitted from the expansion mechanism and the electric motor, and sucks and compresses the fluid.
  • the expansion mechanism is heated by the fluid discharged from the high-temperature compressor.
  • the temperature of discharged hot water decreases due to a decrease in discharge gas temperature.
  • the blowing temperature during heating decreases and the capacity decreases during cooling.
  • the power recovery effect is offset by internal heat loss.
  • Patent Document 1 discloses a technique of attaching a heat insulating material to the expansion mechanism side.
  • Patent Document 1 Japanese Patent Laid-Open No. 2005-106064
  • the present invention has been made in view of the force and the point, and the object of the present invention is compression.
  • the object of the present invention is compression.
  • heat exchange between the expansion mechanism or the compression mechanism and the casing can be prevented by devising the compression mechanism or the fixing structure of the expansion mechanism.
  • the compression mechanism (50) or the expansion mechanism (60) is fixed to the casing (31) via the mounting plate (101).
  • the first invention is directed to a fluid machine provided in a refrigerant circuit (20) that performs a refrigeration cycle by circulating refrigerant.
  • the fluid machine includes a casing (31), a compression mechanism (50) accommodated in the casing (31) and compresses the refrigerant, and an expander accommodated in the casing (31) and expands the refrigerant.
  • the refrigerant compressed by the compression mechanism (50) of the fluid machine (30) provided in the refrigerant circuit (20) is radiated by the heat exchanger for heat dissipation, and then the fluid machine (30 ) Into the expansion mechanism (60).
  • the high-pressure refrigerant that has flowed in expands.
  • the power recovered from the high-pressure refrigerant by the expansion mechanism (60) is transmitted to the compression mechanism (50) by the rotation shaft (40) and used to drive the compression mechanism (50).
  • the refrigerant expanded by the expansion mechanism (60) absorbs heat by the heat exchanger for heat absorption and then is sucked into the compression mechanism (50) of the fluid machine (30).
  • the compression mechanism (50) or the expansion mechanism (60) is firmly fixed to the casing (31), thereby preventing the casing (31) from bulging and the compression mechanism (50 ) Or excessive vibration of the expansion mechanism (60) is prevented.
  • the expansion mechanism (60) is kept at a low temperature and the compression mechanism (50) is kept at a high temperature, so that a temperature difference occurs between them.
  • the difference between the surface temperature of the compression mechanism (50) and the temperature of the casing (31) near this compression mechanism (50), the surface temperature of the expansion mechanism (60) and the temperature of this expansion mechanism (60) casing (31) The compression mechanism (50) or expansion mechanism (60) side with a large temperature difference is fixed to the casing (31) with the mounting plate (101).
  • the mounting plate (101) have a high thermal resistance, heat exchange between the low-temperature refrigerant inside the expansion mechanism (60) and the high-temperature refrigerant inside the compression mechanism (50) is achieved. Decrease.
  • the casing (31) has a cylindrical container shape, the mounting plate (101) is formed in an annular shape, and the compressor on the inner peripheral side.
  • the part (105) protrudes radially outward, and a predetermined plate outer peripheral gap (108) is formed between the casing side mounting part (105) and the inner surface of the casing (31).
  • the part (104) and the casing side attachment part (105) are arranged shifted in the circumferential direction!
  • the joint (67) between the mounting plate (101) and the casing (31) is limited to the casing side mounting portion (105) by providing the plate outer peripheral gap (108).
  • the heat transfer area is smaller than when the casing (31) is joined all around.
  • the mechanism-side mounting portion (104) and the casing-side mounting portion (105) in the circumferential direction, the heat transfer path can be reduced compared to when both mounting portions are provided at the same position in the circumferential direction.
  • the refrigerant is directly introduced into the compressor mechanism (50) from the refrigerant circuit (20), and the refrigerant compressed by the compression mechanism (50) is compressed into the casing ( 31) It is configured to be discharged into the inner space (49) in the inner space (49) and to flow out of the casing (31) from the inner space (49), and the expansion mechanism (60) is interposed via the mounting plate (101). It is fixed to the casing (31).
  • the casing (31) is a so-called high-pressure dome type fluid machine in which high temperature and high pressure are maintained.
  • the low temperature expansion mechanism (60) which has a significant temperature difference from the atmosphere in the casing (31), is fixed to the casing (31) via the mounting plate (101), so that the mounting plate (101) The heat transfer reduction effect of the Heat input due to heat conduction from the sink (31) to the low temperature expansion mechanism (60) is reduced.
  • the refrigerant is directly introduced from the refrigerant circuit (20) into the compressor structure (50), and the compressed refrigerant is directly discharged out of the casing (31).
  • the compression mechanism (50) is fixed to the casing (31) via the mounting plate (101).
  • the casing (31) is a so-called low-pressure dome type fluid machine that is maintained at a low temperature and a low pressure.
  • the temperature difference with the atmosphere in the casing (31) is severe, and the high-temperature compression mechanism (50) is fixed to the low-temperature casing (31) via the mounting plate (101).
  • the heat transfer reduction effect of 101) reduces heat input due to heat conduction from the high-temperature compression mechanism (50) to the low-temperature casing (31).
  • the mechanism-side mounting portion (104) is provided with the expansion mechanism.
  • the surface temperature is higher than the periphery of (60)! /, And the portion is arranged to connect the portion having a lower surface temperature than the periphery of the casing (31) in the vicinity of the expansion mechanism (60)! / RU
  • the mechanism-side mounting portion (104) at one end of the heat transfer path in the mounting plate (101) has the surface temperature of the expansion mechanism (60) and the case near the expansion mechanism (60). Since it is arranged so that the difference between the surface temperature and the single singe (31) is small, the temperature difference between the mechanism side mounting part (104) and the casing side mounting part (105) is reduced, and Heat input from the casing (31) side to the low temperature expansion mechanism (60) side is reduced. For this reason, heat exchange by heat conduction between the low-temperature refrigerant inside the expansion mechanism (60) and the high-temperature refrigerant inside the compression mechanism (50) is reduced.
  • a sixth invention is the third invention, wherein the casing-side mounting portion (105) has a surface temperature higher than that of the periphery of the expansion mechanism (60), the portion and the expansion mechanism (60 ) The surface temperature is lower than that of the vicinity of the casing (31) in the vicinity.
  • the casing side mounting portion (105) at one end of the heat transfer path in the mounting plate (101) has the surface temperature of the expansion mechanism (60) and the casing in the vicinity of the expansion mechanism (60). (31), the temperature difference between the mechanism side mounting part (104) and the casing side mounting part (105) is reduced, so that the difference between the surface temperature and the surface temperature is small. Low heat input from the (31) side to the low temperature expansion mechanism (60) side. Because of this, expansion Heat exchange due to heat conduction between the low-temperature refrigerant in the mechanism (60) and the high-temperature refrigerant in the compression mechanism (50) is reduced.
  • a seventh invention is the invention according to any one of the second to sixth inventions, wherein the mounting plate (101) is provided between the mechanism side mounting portion (104) and the casing side mounting portion (105).
  • the circumferential sectional area of the casing is smaller than the circumferential sectional area of the casing-side mounting portion (105).
  • the mounting plate (101) has a sheet metal structure.
  • the mounting plate (101) is a sheet metal structure formed of a thin plate, the heat transfer area of the heat transfer path is reduced, so that the compression mechanism (50) or the expansion mechanism (60) And heat exchange between the casing and the casing (31) is reduced. For this reason, heat exchange by heat conduction between the low-temperature refrigerant inside the expansion mechanism (60) and the high-temperature refrigerant inside the compression mechanism (50) is reduced.
  • the mounting plate (101) includes a plurality of through holes (106, 107).
  • a tenth invention is the invention according to any one of the second to ninth inventions, provided in the internal space of the casing (31), and the casing in the compression mechanism (50) or the expansion mechanism (60).
  • a heat insulating material (90, 96) is provided which covers the entire exposed surface in the shing (31) and through which the rotating shaft (40) passes. [0030] According to the above configuration, since the heat insulating material (90, 96) covers the entire exposed surface in the casing (31) of the compression mechanism (50) or the expansion mechanism (60), the casing (31 ) And the heat exchange between the compression mechanism (50) or the expansion mechanism (60) covered with the heat insulating material (90, 96) is prevented.
  • the heat insulating material (90, 96) is a first heat insulating material in the axial direction of the rotating shaft (40) with the mounting plate (101) as a boundary. (90) and second insulation (96).
  • the compression mechanism (50) or the expansion mechanism (60) causes the heat insulation (90, 96) fixed to the casing (31) by the mounting plate (101) to be the first heat insulation.
  • the heat insulating material (90, 96) can be easily assembled.
  • the heat insulating material (90, 96) is also provided in the plate outer peripheral gap (108).
  • the mounting plate (101) is also covered with the heat insulating material (90, 96), heat exchange between the refrigerant and the mounting plate (101) is prevented. Heat exchange between the mechanism (50) or expansion mechanism (60) and the casing (31) is reduced. For this reason, heat exchange due to heat conduction between the low-temperature refrigerant inside the expansion mechanism (60) and the high-temperature refrigerant inside the compression mechanism (50) is reduced.
  • any one of the second to twelfth forces described above, the mechanism side mounting portion (104) and the mechanism side of the compression mechanism (50) or the expansion mechanism (60) in one aspect At least one of the attachment part (104) and the joint part (67) to be joined is formed in a protruding shape in order to reduce the contact area.
  • the mounting plate (101) and the compression mechanism (50) or the expansion mechanism (60) are compared to the case where the mechanism-side mounting portion (104) and the joint portion (67) are joined over the entire surface. Since the heat transfer area of the heat transfer path between the compression mechanism (50) and the expansion mechanism (60) and the casing (31) is reduced. For this reason, heat exchange by heat conduction between the low-temperature refrigerant inside the expansion mechanism (60) and the high-temperature refrigerant inside the compression mechanism (50) is reduced.
  • a heat insulating spacer (110) made of a heat insulating material is disposed between the attachment portion (104) and the joint portion (67) to be joined.
  • the mounting plate (101) is provided by disposing a small heat transfer coefficient and a heat insulating spacer (110) between the mechanism side mounting portion (104) and the joint portion (67). ) And the compression mechanism (50) or the expansion mechanism (60), the heat resistance between the compression mechanism (50) or the expansion mechanism (60) and the casing (31) is increased. Reduced. For this reason, heat exchange due to heat conduction between the low-temperature refrigerant inside the expansion mechanism (60) and the high-temperature refrigerant inside the compression mechanism (50) is reduced.
  • the refrigerant circuit (20) performs a supercritical refrigeration cycle using carbon dioxide as a refrigerant.
  • carbon dioxide as a refrigerant circulates in the refrigerant circuit (20) to which the fluid machine (30) is connected.
  • the compression mechanism (50) of the fluid machine (30) compresses and discharges the sucked refrigerant to a level equal to or higher than the critical pressure.
  • the expansion mechanism (60) of the fluid machine (30) is expanded by introducing a high-pressure refrigerant equal to or higher than the critical pressure.
  • the force S can be used to prevent a decrease in capacity and power recovery effect.
  • the predetermined plate outer peripheral gap (108) is formed between the casing side mounting portion (105) protruding from the mounting plate (101) and the casing (31),
  • the joint area between the mounting plate (101) and the casing (31) is reduced to reduce the heat transfer area, and the mechanism side mounting part (104) of the annular mounting plate (101) and the casing side mounting part (105) is shifted in the circumferential direction to lengthen the heat transfer path.
  • the temperature difference from the atmosphere in the casing (31) is severe, and the low-temperature expansion mechanism (60) is interposed via the mounting plate (101).
  • the heat exchange by heat conduction between the hot casing (31) and the low temperature expansion mechanism (60) is reduced by fixing to the casing (31). Can be prevented.
  • the temperature difference from the atmosphere in the casing (31) is severe, and the high-temperature compression mechanism (50) is interposed via the mounting plate (101).
  • the heat exchange due to heat conduction between the low-temperature casing (31) and the high-temperature expansion mechanism (60) fixed to the low-temperature casing (31) is further reduced. A decrease in the effect can be prevented.
  • the mechanism-side mounting portion (104) is arranged so as to reduce the difference between the surface temperature of the expansion mechanism (60) and the surface temperature of the casing (31) in the vicinity thereof.
  • the power S can be used to prevent further decline in capacity and power recovery effect.
  • the casing side mounting portion (105) is arranged so as to reduce the difference between the surface temperature of the expansion mechanism (60) and the surface temperature of the casing (31) in the vicinity thereof. By reducing the heat input from the high temperature side to the low temperature side, it is possible to prevent further reduction in capacity and power recovery effect.
  • the heat transfer area of the heat transfer path is reduced by reducing the circumferential cross-sectional area of the mounting plate (101) to reduce the compression mechanism (50) or the expansion mechanism (60).
  • the heat transfer with the casing (31) it is possible to prevent further reduction in capacity and power recovery effect.
  • the mounting plate (101) is a sheet metal structure constituted by a thin plate, and the heat transfer area of the heat transfer path is reduced, so that the compression mechanism (50) or the expansion mechanism (60) is connected to the casing.
  • a plurality of through holes (106, 107) are provided in the mounting plate (101) to reduce the heat transfer area of the heat transfer path, and the compression mechanism (50) or the expansion mechanism ( By reducing the heat exchange between 60) and the casing (31), it is possible to prevent further reduction in capacity and power recovery effect.
  • the casing (31) Prevents heat exchange between the internal space of the compressor and the compression mechanism (50) or expansion mechanism (60) covered with heat insulation material (90, 96)! Can be prevented.
  • the heat insulating material (90, 96) is divided in the axial direction of the rotating shaft (40) with the mounting plate (101) as a boundary, so that the set of heat insulating materials (90, 96) is obtained. It is easy to attach, and the manufacturing cost can be reduced.
  • the plate outer circumferential gap (108) is also provided with the heat insulating material (90, 96) to prevent heat exchange with the refrigerant, and the compression mechanism (50) or the expansion mechanism ( By reducing the heat exchange between 60) and the casing (31), it is possible to prevent further reduction in capacity and power recovery effect.
  • At least one of the mechanism-side attachment portion (104) and the joint portion (67) of the compression mechanism (50) or the expansion mechanism (60) is projected to increase the contact area.
  • the heat insulating spacer made of a heat insulating material is provided between the mechanism side mounting portion (104) and the joint portion (67) of the compression mechanism (50) or the expansion mechanism (60).
  • (110) is arranged to increase the thermal resistance between the mounting plate (101) and the compression mechanism (50) or the expansion mechanism (60), so that the compression mechanism (50) or the expansion mechanism (60) and the casing (31 ), It is possible to prevent further reduction in capacity and power recovery effect.
  • FIG. 1 is a piping system diagram showing a configuration of a refrigerant circuit according to a first embodiment.
  • FIG. 2 is a longitudinal sectional view showing a schematic configuration of a compression / expansion unit according to Embodiment 1.
  • FIG. 3 is a longitudinal sectional view showing an expansion mechanism and a heat insulating material according to Embodiment 1.
  • 4 is a cross-sectional view taken along the line IV-IV in FIG.
  • FIG. 5 is a cross-sectional view of the V-V spring in FIG.
  • FIG. 6 is a cross-sectional view taken along line VI—VI in FIG.
  • FIG. 7] is an enlarged view showing the main part of the expansion mechanism of the first embodiment.
  • FIG. 8 A schematic cross-sectional view of the expansion mechanism showing the state of the expansion mechanism of Embodiment 1 for each rotation angle of the shaft of 90 °.
  • FIG. 4 is a diagram corresponding to FIG. 4 according to Modification 1 of Embodiment 1.
  • FIG. 10 is a cross-sectional view taken along the line XX of FIG.
  • FIG. 4 is a diagram corresponding to FIG. 4 according to Modification 2 of Embodiment 1.
  • FIG. 6 is a diagram corresponding to FIG. 6 according to Modification 3 of Embodiment 1.
  • This embodiment is a book An air conditioner including a compression / expansion unit that is a fluid machine according to the invention.
  • the air conditioner (10) of the present embodiment includes a refrigerant circuit (20).
  • the refrigerant circuit (20) includes a compression / expansion unit (30), an outdoor heat exchanger (23), an indoor heat exchanger (24), a first four-way selector valve (21), and a second A four-way selector valve (22) is connected.
  • the refrigerant circuit (20) is filled with carbon dioxide (CO 2) as a refrigerant.
  • the compression / expansion unit (30) includes a casing (31) formed in a vertically long cylindrical sealed container shape.
  • the casing (31) houses a compression mechanism (50), an expansion mechanism (60), and an electric motor (45).
  • the compression mechanism (50), the electric motor (45), and the expansion mechanism (60) are arranged in order from the bottom to the top. Details of the compression / expansion unit (30) will be described later.
  • the compression mechanism (50) has its discharge side (discharge pipe (37)) connected to the first port of the first four-way switching valve (21).
  • the suction side (suction pipe (36)) is connected to the fourth port of the first four-way selector valve (21).
  • the expansion mechanism (60) has its outflow side (outflow pipe (39)) connected to the first port of the second four-way switching valve (22) and its inflow side (inflow pipe (38)) connected to the second 4th switching valve (22). Each is connected to the fourth port of the path switching valve (22).
  • the outdoor heat exchanger (23) has one end connected to the second port of the second four-way switching valve (22) and the other end connected to the first four-way switching valve. Each is connected to the third port of (21).
  • the indoor heat exchanger (24) has one end connected to the second port of the first four-way selector valve (21) and the other end connected to the third port of the second four-way selector valve (22). It is connected.
  • the first four-way switching valve (21) and the second four-way switching valve (22) are connected to the first port and the second port, respectively, and the third port and the fourth port, respectively. Are connected to each other (shown by a solid line in FIG. 1), the first port is connected to the third port, and the second port is connected to the fourth port (shown by a broken line in FIG. 1). To the state shown in FIG. 1,
  • the compression / expansion unit (30) includes a casing (31) which is a vertically long and cylindrical sealed container. Inside this casing (31), from bottom to top In addition, a compression mechanism (50), an electric motor (45), and an expansion mechanism (60) are arranged. In addition, refrigeration oil, which is lubricating oil, is stored at the bottom of the casing (31). In other words, refrigeration oil is stored near the compression mechanism (50) inside the casing (31)!
  • the internal space of the casing (31) is partitioned vertically by a first heat insulating material (90), which will be described later, provided below the front head (61) of the expansion mechanism (60), and the upper space is the first space.
  • the space (48) and the lower space constitute the second space (49), respectively.
  • An expansion mechanism (60) is disposed in the first space (48), and a compression mechanism (50) and an electric motor (45) are disposed in the second space (49).
  • a discharge pipe (37) is attached to the casing (31).
  • the discharge pipe (37) is disposed between the electric motor (45) and the expansion mechanism (60), and communicates with the second space (49) in the casing (31). Further, the discharge pipe (37) is formed in a comparatively short straight tube and is installed in a substantially horizontal posture.
  • the electric motor (45) is arranged at the center of the casing (31) in the longitudinal direction.
  • the electric motor (45) includes a stator (46) and a rotor (47).
  • the stator (46) is fixed to the casing (31) by shrink fitting or the like.
  • the rotor (47) is disposed inside the stator (46).
  • the main shaft portion (44) of the rotating shaft (40) passes through the rotor (47) coaxially with the rotor (47).
  • the rotating shaft (40) constitutes a rotating shaft.
  • two lower eccentric portions (58, 59) are formed on the lower end side, and two large diameter eccentric portions (41, 42) are formed on the upper end side.
  • the rotating shaft (40) has a lower end portion formed with the lower eccentric portion (58, 59) at the compressor mechanism (50) and an upper end portion formed with the large diameter eccentric portion (41, 42) at the expansion mechanism ( 60) are engaged.
  • the two lower eccentric portions (58, 59) are formed to have a larger diameter than the main shaft portion (44), the lower one being the first lower eccentric portion (58) and the upper one being the first. 2 Configure the lower eccentric part (59). In the first lower eccentric portion (58) and the second lower eccentric portion (59), the eccentric directions of the main shaft portion (44) with respect to the axial center are reversed.
  • the two large-diameter eccentric parts (41, 42) are formed with a larger diameter than the main shaft part (44), and the lower one constitutes the first large-diameter eccentric part (41) and the upper one Constitutes the second large-diameter eccentric part (42)!
  • the first large-diameter eccentric part (41) and the second large-diameter eccentric part (42) are both eccentric in the same direction.
  • First 2 The outer diameter of the large-diameter eccentric part (42) is larger than the outer diameter of the first large-diameter eccentric part (41). Also, the amount of eccentricity of the main shaft portion (44) with respect to the shaft center is such that the second large diameter eccentric portion (42) is larger than the first large diameter eccentric portion (41)!
  • an oil supply passage is formed in the rotating shaft (40).
  • the oil supply passage extends along the rotating shaft (40), and its starting end opens at the lower end of the rotating shaft (40) and its terminal end opens above the rotating shaft (40).
  • Refrigerating machine oil is supplied to the compression mechanism (50) and the expansion mechanism (60) from this oil supply passage.
  • the refrigerating machine oil supplied to the expansion mechanism (60) is minimized, and the refrigerating machine oil lubricated with the expansion mechanism (60) does not flow out into the first space (48) but flows into the outflow pipe ( 39) Power is discharged.
  • the compression mechanism (50) constitutes a so-called oscillating piston type rotary compressor.
  • the compression mechanism (50) includes two cylinders (51, 52) and two pistons (57).
  • the rear head (55), the first cylinder (51), the intermediate plate (56), the second cylinder (52), the front head ( 54) are stacked.
  • One cylindrical piston (57) is disposed inside each of the first and second cylinders (51, 52). Although not shown, a flat blade is projected on the side surface of the piston (57), and this blade is supported by the cylinders (51, 52) via a swing bush.
  • the piston (57) in the first cylinder (51) engages with the first lower eccentric part (58) of the rotating shaft (40).
  • the piston (57) in the second cylinder (52) engages with the second lower eccentric portion (59) of the rotating shaft (40).
  • Each piston (57, 57) has its inner peripheral surface in sliding contact with the outer peripheral surface of the lower eccentric portion (58, 59), and its outer peripheral surface is in sliding contact with the inner peripheral surface of the cylinder (51, 52).
  • a compression chamber (53) is formed between the outer peripheral surface of the piston (57, 57) and the inner peripheral surface of the cylinder (51, 52).
  • One suction port (32) is formed in each of the first and second cylinders (51, 52). Each suction port (32) penetrates the cylinder (51, 52) in the radial direction, and the end thereof opens to the inner peripheral surface of the cylinder (51, 52). Each suction port (32) is extended outside the casing (31) by a suction pipe (36).
  • One discharge port is formed in each of the front head (54) and the rear head (55).
  • the discharge port of the front head (54) connects the compression chamber (53) in the second cylinder (52). Communicate with the second space (49).
  • the discharge port of the rear head (55) allows the compression chamber (53) in the first cylinder (51) to communicate with the second space (49).
  • Each discharge port is provided with a discharge valve serving as a reed valve at its end, and is opened and closed by this discharge valve. In FIG. 2, the discharge port and the discharge valve are not shown.
  • the gas refrigerant discharged from the compression mechanism (50) into the second space (49) is sent out from the compression / expansion unit (30) through the discharge pipe (37).
  • the expansion mechanism (60) is a so-called oscillating piston type rotary expander.
  • the expansion mechanism (60) is provided with two pairs of cylinders (71, 81) and pistons (75, 85) which are paired.
  • the expansion mechanism (60) includes a front head (61), an intermediate plate (63), and a rear head (62).
  • the front head (61), the first cylinder (71), the intermediate plate (63), the second cylinder (81), and the rear head (62) are stacked in this order from bottom to top. It is in the state that was done.
  • the first cylinder (71) has its lower end face closed by the front head (61) and its upper end face closed by the intermediate plate (63).
  • the second cylinder (81) has its lower end face closed by the intermediate plate (63) and its upper end face closed by the rear head (62).
  • the inner diameter of the second cylinder (81) is larger than the inner diameter of the first cylinder (71).
  • the expansion mechanism (60) is fixed to the inner surface of the casing (31) via the mounting plate (101).
  • the mounting plate (101) is made of a ring-shaped sheet metal structure, and is formed on the lower side of the entire circumference from the disk-shaped plate body (102) and the plate body (102). And a bent portion (103) bent approximately 90 degrees.
  • the mounting plate (101) has a mechanism side mounting portion (104) fixed to the expansion mechanism (60) on the inner peripheral side, and a casing side mounting portion (105) fixed to the casing (31) on the outer peripheral side.
  • the joint portion (67) to be joined to the mechanism-side mounting portion (104) in the front head (61) of the expansion mechanism (60) is provided to protrude outward from the outer periphery of the front head (61).
  • the joint portions (67) are formed at intervals of 120 ° equally in the circumferential direction at three locations.
  • a bolt fastening hole (68) is formed at the center of the joint (67). ing.
  • the periphery of the bolt fastening hole (68) is formed to protrude upward.
  • a bolt fastening hole (104a) is formed at the center of the mechanism side mounting portion (104).
  • the periphery of the bolt fastening hole (104a) is formed so as to protrude downward. This reduces the contact area between the mechanism side mounting portion (104) and the joint portion (67).
  • the casing side mounting portion (105) is formed so as to protrude radially outward from the outer periphery of the mounting plate (101). In the present embodiment, the three portions are equally spaced 120 ° apart in the circumferential direction.
  • the casing side mounting portion (105) is welded to the inner surface of the casing (31).
  • a predetermined plate outer peripheral gap (108) is formed between each casing side mounting portion (105) and the casing (31).
  • the mounting plate (101) includes a mechanism side mounting portion (104) and a casing side mounting portion.
  • the cross-sectional area in the circumferential direction with respect to (105) is smaller than the cross-sectional area in the circumferential direction of the casing side mounting portion (105).
  • the mounting plate (101) includes a plurality of through holes (106, 107) for reducing the cross-sectional area in the circumferential direction.
  • the mechanism side mounting portion (104) and the casing side mounting portion (105) are arranged so as to be shifted in the circumferential direction. That is, in the present embodiment, the casing side mounting portion (105) is disposed at the center position in the circumferential direction of the two mechanism side mounting portions (104).
  • the rotary shaft (40) passes through the stacked front head (61), first cylinder (71), intermediate plate (63), and second cylinder (81). A central hole penetrating the rear head (62) in the thickness direction is formed at the center of the rear head (62). The upper end of the rotating shaft (40) is inserted into the central hole of the rear head (62).
  • the rotary shaft (40) has its first large-diameter eccentric part (41) located in the first cylinder (71) and its second large-diameter eccentric part (42) in the second cylinder (81). positioned.
  • the first piston (75) is provided in the first cylinder (71), and the second piston (85) is provided in the second cylinder (81). ing.
  • the first and second pistons (75, 85) are both formed in an annular shape or a cylindrical shape.
  • the outer diameter of the first piston (75) and the outer diameter of the second piston (85) are equal to each other.
  • the inner diameter of the first piston (75) is approximately equal to the outer diameter of the first large-diameter eccentric part (41), and the inner diameter of the second piston (85) is approximately equal to the outer diameter of the second large-diameter eccentric part (42).
  • the first piston (75) has a first large diameter eccentric part (4 1)
  • the second large diameter eccentric part (42) penetrates the force S and the second piston (85).
  • the first piston (75) has an outer peripheral surface on the inner peripheral surface of the first cylinder (71), one end surface force S on the front head (61), and the other end surface on the intermediate plate (63). Each is in sliding contact.
  • a first expansion chamber (72) is formed in the first cylinder (71) between the inner peripheral surface thereof and the outer peripheral surface of the first piston (75).
  • the second piston (85) has an outer peripheral surface on the inner peripheral surface of the second cylinder (81), one end surface on the rear head (62), and the other end surface on the intermediate plate (63). It is in sliding contact.
  • a second expansion chamber (82) is formed in the second cylinder (81) between its inner peripheral surface and the outer peripheral surface of the second piston (85).
  • Each of the first and second pistons (75, 85) is integrally provided with one blade (76, 86).
  • the blades (76, 86) are formed in a plate shape extending in the radial direction of the piston (75, 85), and project outward from the outer peripheral surface of the piston (75, 85).
  • the blade (76) of 5) is inserted into the bush hole (78) of the first cylinder (71), and the blade (86) of the second piston (85) is inserted into the bush hole (88) of the second cylinder (81).
  • the bush holes (78, 88) of the cylinders (71, 81) penetrate the cylinders (71, 81) in the thickness direction, and open to the inner peripheral surface of the cylinders (71, 81).
  • These bush holes (78, 88) constitute through holes (10 6, 107).
  • Each cylinder (71, 81) is provided with a pair of force pairs of bushes (77, 87).
  • Each bush (77, 87) is a small piece formed such that the inner surface is a flat surface and the outer surface is a circular arc surface.
  • the pair of bushes (77, 87) are inserted into the bush holes (78, 88) and sandwich the blades (76, 86).
  • Each bush (77, 87) has its inner surface sliding with the blade (76, 86) and its outer surface with the cylinder (71, 81).
  • the blades (76, 86) integral with the piston (75, 85) are supported by the cylinders (71, 81) via the bushes (77, 87), and rotate with respect to the cylinders (71, 81). It is free to move forward and backward.
  • the first expansion chamber (72) in the first cylinder (71) has a first blade (7) integrated with the first piston (75).
  • the left side of the first blade (76) in FIGS. 7 and 8 is the first high pressure chamber (73) on the high pressure side, and the right side is the first low pressure chamber (74) on the low pressure side.
  • the second expansion chamber (82) in the second cylinder (81) is partitioned by a second blade (86) integral with the second piston (85). 7 and 8, the left side of the second blade (86) is the high pressure side second high pressure chamber (83), and the right side is the low pressure side second low pressure chamber (84).
  • the first cylinder (71) and the second cylinder (81) are arranged in a posture in which the positions of the bushes (77, 87) in the respective circumferential directions coincide.
  • the arrangement angle of the second cylinder (81) with respect to the first cylinder (71) is 0 °.
  • the first large-diameter eccentric part (41) and the second large-diameter eccentric part (42) are eccentric in the same direction with respect to the axis of the main shaft part (44). Therefore, at the same time as the first blade (76) is most retracted to the outside of the first cylinder (71), the second blade (86) is most retracted to the outside of the second cylinder (81). Become.
  • the first cylinder (71) has an inflow port (34).
  • the inflow port (34) opens at a position slightly on the left side of the bush (77) in FIGS. 7 and 8 on the inner peripheral surface of the first cylinder (71).
  • the inflow port (34) can communicate with the first high pressure chamber (73).
  • the second cylinder (81) is formed with an outflow port (35).
  • the outflow port (35) opens at a position slightly on the right side of the bush (87) in FIGS. 7 and 8 on the inner peripheral surface of the second cylinder (81).
  • Outflow port (35) can communicate with second low pressure chamber (84)
  • communication passages (93) and (64) are formed in the intermediate plate (63).
  • the communication passages (93) and (64) penetrate the intermediate plate (63) in the thickness direction.
  • one end of the communication passages (93) and (64) is opened at the right side of the first blade (76).
  • the other end of the communication passages (93) (64) is opened at the left side of the second blade (86).
  • the communication passages (93) (64) extend obliquely with respect to the thickness direction of the intermediate plate (63), and the first low pressure chamber (74) and the second high pressure chamber (83) And communicate with each other!
  • the first cylinder (71), the bush (77) provided there, the first piston (75), and the first The blade (76) constitutes the first rotary mechanism (70).
  • the second cylinder (81), the bush (87) provided there, the second piston (85), and the second blade (86) constitute the second rotary mechanism (80).
  • the inner space of the casing (31) covers the entire exposed surface in the casing (31) of the expansion mechanism (60), and the heat insulating material through which the rotating shaft (40) passes. (90, 96).
  • the heat insulating material (90, 96) is divided into the first heat insulating material (90) and the second heat insulating material (96) in the axial direction of the rotating shaft (40) with the mounting plate (101) as a boundary! .
  • the first heat insulating material (90) on the lower side extends from the periphery of the rotary shaft (40) to the inner peripheral surface of the casing (31) so as to contact the compression mechanism (50) side of the expansion mechanism (60). It is provided to cover up to.
  • the first space (48) on the low-temperature expansion mechanism (60) side where the temperature difference from the atmosphere in the casing (31) is significant, is changed from the second space (49) by the first heat insulating material (90). It is delimited.
  • the first heat insulating material (90) is a disk-shaped member having a central hole through which the rotation shaft (40) passes, and the front head ( It is provided so as to contact the lower surface of 61).
  • a minimum gap is formed between the outer peripheral surface of the rotating shaft (40) and the inner peripheral surface of the first heat insulating material (90) so as not to hinder the rotation of the rotating shaft (40).
  • the upper second heat insulating material (96) has a substantially cylindrical shape having a top plate, and is provided in the casing (31) on the side surface and the upper surface of the expansion mechanism (60). Covers the entire exposed surface. That is, the inflow pipe (38) and the outflow pipe (39) pass through the second heat insulating material (96). In addition, cover the outer periphery of the inflow pipe (38) and outflow pipe (39).
  • the heat insulating material (90, 96) is also provided in the plate outer peripheral gap (108) between the casing side mounting portion (105) and the casing (31). It has been. Specifically, the side surface of the mounting plate (101) is covered with a portion protruding from the lower surface of the second heat insulating material (96). Cover the side surface of the mounting plate (101) with the part protruding from the top surface of the first insulation (90).
  • first and second heat insulating materials are made of resin molded products! Specific materials may be special engineering plastics with high heat resistance (240-250 ° C). For example, PPS (polyphenylene sulfide), PEEK (polyetherketone), PI (polyamide) and the like.
  • air conditioner (10) The operation of the air conditioner (10) will be described.
  • air-conditioner (10) during cooling operation The operation during the heating operation will be described, followed by the operation of the expansion mechanism (60).
  • the first four-way switching valve (21) and the second four-way switching valve (22) are switched to the state shown by the broken line in FIG. In this state, when the motor (45) of the compression / expansion unit (30) is energized, the refrigerant circulates in the refrigerant circuit (20), and a vapor compression refrigeration cycle is performed.
  • the refrigerant compressed by the compression mechanism (50) is discharged from the compression / expansion unit (30) through the discharge pipe (37). In this state, the refrigerant pressure is higher than its critical pressure. This discharged refrigerant is sent to the outdoor heat exchanger (23) to radiate heat to the outdoor air.
  • the high-pressure refrigerant radiated by the outdoor heat exchanger (23) flows into the expansion mechanism (60) through the inflow pipe (38). In the expansion mechanism (60), the high-pressure refrigerant expands, and power is recovered from the high-pressure refrigerant.
  • the low-pressure refrigerant after expansion is sent to the indoor heat exchanger (24) through the outflow pipe (39).
  • the refrigerant that has flowed in absorbs heat from the room air and evaporates, thereby cooling the room air.
  • the low-pressure gas refrigerant discharged from the indoor heat exchanger (24) passes through the suction pipe (36) and is sucked into the compression mechanism (50) from the suction port (32).
  • the compression mechanism (50) compresses and discharges the sucked refrigerant.
  • the first four-way selector valve (21) and the second four-way selector valve (22) are switched to the state shown by the solid line in FIG. In this state, when the motor (45) of the compression / expansion unit (30) is energized, the refrigerant circulates in the refrigerant circuit (20), and a vapor compression refrigeration cycle is performed.
  • the refrigerant compressed by the compression mechanism (50) is discharged from the compression / expansion unit (30) through the discharge pipe (37). In this state, the refrigerant pressure is higher than its critical pressure.
  • This discharged refrigerant is sent to the indoor heat exchanger (24).
  • the indoor heat exchanger (24) the refrigerant flowing in dissipates heat to the room air, and the room air is heated.
  • the refrigerant that has dissipated heat in the indoor heat exchanger (24) flows into the expansion mechanism (60) through the inflow pipe (38). In the expansion mechanism (60), the high-pressure refrigerant expands and the high-pressure refrigerant power is recovered.
  • the expanded low-pressure refrigerant is sent to the outdoor heat exchanger (23) through the outflow pipe (39), absorbs heat from the outdoor air, and evaporates.
  • the low-pressure gas refrigerant discharged from the outdoor heat exchanger (23) is sucked into the compression mechanism (50) from the suction port (32) through the suction pipe (36).
  • the compression mechanism (50) compresses and discharges the sucked refrigerant.
  • the rotation shaft (40) When the rotation shaft (40) is slightly rotated from the state where the rotation angle is 0 °, the first low pressure chamber (74) and the second high pressure chamber (83) communicate with each other via the communication passages (93) and (64). The refrigerant begins to flow from the first low pressure chamber (74) to the second high pressure chamber (83). After that, as the rotation angle of the rotating shaft (40) gradually increases to 90 °, 180 °, 270 °, the volume of the first low pressure chamber (74) gradually decreases and the volume of the second high pressure chamber (83) decreases. The volume gradually increases, and as a result, the volume of the expansion chamber (66) gradually increases.
  • the second low pressure chamber (84) begins to communicate with the outflow port (35) when the rotation angle of the rotating shaft (40) is 0 °. That is, the refrigerant begins to flow from the second low pressure chamber (84) to the outflow port (35). After that, the rotation angle of the rotating shaft (40) gradually increased to 90 °, 180 °, 270 ° and until the rotation angle reached 360 °, the second low pressure chamber (84) The low-pressure refrigerant after expansion flows out.
  • the first heat insulating material (90) is attached from the lower side of the mounting plate (101), and the second heat insulating material (96) is attached from the upper side.
  • the heat insulating material (90, 96) is divided into the first heat insulating material (90) and the second heat insulating material (96), the heat insulating material (90, 96) can be easily assembled.
  • the internal space of the casing (31) has a first space (48) in which the expansion mechanism (60) is accommodated, and a second space (49) in which the compression mechanism (50) is accommodated.
  • the first space (48) has a low temperature and high density
  • the second space (49) has a high temperature and low density.
  • the inside of the casing (31) is a so-called high-pressure dome type fluid machine that is maintained at a high temperature and a high pressure.
  • the heat transfer path is greater than when both mounting portions are provided at the same position in the circumferential direction. Increase the length with a force S. For this reason, the thermal resistance increases, and heat exchange between the expansion mechanism (60) and the casing (31) is reduced.
  • the cross-sectional area in the circumferential direction between the mechanism side mounting portion (104) and the casing side mounting portion (105) is The heat transfer area of the heat transfer path of the mounting plate (101) is reduced by making it smaller than the cross-sectional area in the circumferential direction of the single-side mounting portion (105).
  • the mounting plate (101) has a sheet metal structure made of a thin plate, so that the heat transfer area of the heat transfer path is reduced. Further, by forming the through holes (106, 107) in the mounting plate (101), the heat transfer area of the heat transfer path is reduced.
  • the periphery of the bolt fastening hole (68) protrudes upward and is formed, and the periphery of the bolt fastening hole (104a) protrudes downward to form the mechanism side mounting part (104) and joint part.
  • the contact area with (67) is reduced. In this way, the heat transfer area of the heat transfer path between the mounting plate (101) and the expansion mechanism (60) is reduced, so heat exchange between the expansion mechanism (60) and the casing (31) is reduced. Is done.
  • Refrigerant convection is effective by dividing the first space (48) on the low-temperature expansion mechanism (60) side, which has a large temperature difference from the atmosphere in the casing (31), with the first heat insulating material (90). To be prevented.
  • the heat insulating material (90, 96) covers the entire exposed surface in the casing (31) of the expansion mechanism (60), it is covered with the internal space of the casing (31) and the heat insulating material (90, 96). Heat exchange with the broken expansion mechanism (60) is prevented. For this reason, heat exchange between the expansion mechanism (60) and the casing (31) is further reduced.
  • the mounting plate (101) is also covered with a heat insulating material (90, 96) to prevent heat exchange with the refrigerant, and between the expansion mechanism (60) and the casing (31). Heat exchange is reduced. For this reason, heat exchange due to heat conduction between the low-temperature refrigerant inside the expansion mechanism (60) and the high-temperature refrigerant inside the compression mechanism (50) is reduced.
  • the low temperature expansion mechanism (60) having a large temperature difference from the atmosphere in the casing (31) is directly fixed to the casing (31). Only the mounting part (105) is fixed to the casing (31) via the mounting plate (101) welded to the casing (31), and the space between the high-temperature casing (31) and the low-temperature expansion mechanism (60) is fixed. By reducing heat exchange due to heat conduction, it is possible to prevent further decline in capacity and power recovery effect.
  • the mounting plate (101) is a sheet metal structure composed of a thin plate, a plurality of through holes (106, 107) are provided, or the mechanism side mounting portion (104) and the joint portion (67) are projected.
  • a heat insulating material (90, 96) is also provided in the plate outer peripheral gap (108) to prevent heat exchange with the refrigerant, and heat between the expansion mechanism (60) and the casing (31) is prevented. By reducing replacement, it is possible to prevent further reduction in capacity and power recovery effect.
  • the heat insulating material (90, 96) By dividing the heat insulating material (90, 96) in the axial direction of the rotating shaft (40) with the mounting plate (101) as a boundary, the heat insulating material (90, 96) can be easily assembled and the manufacturing cost can be reduced. Can be lowered.
  • the mechanism-side mounting portion (104) has a higher surface temperature than the periphery of the expansion mechanism (60) and the periphery of the casing (31) in the vicinity of the portion and the expansion mechanism (60). Alternatively, it may be arranged so as to connect with a portion having a lower surface temperature. Note that the through holes (106, 107) are omitted for simplification.
  • the surface temperature of the expansion mechanism (60) is generally distributed in the circumferential direction so as to decrease in order from A to F when viewed from the axial direction.
  • A is the suction temperature 30 ° C F is the discharge temperature 0 ° C.
  • the surface temperature of the casing (31) is distributed in the circumferential direction so as to decrease in order from A to F.
  • A is 90 ° C of the discharge temperature of the compression mechanism (50)
  • F is a low temperature (near 0 °) due to the discharge temperature of the expansion mechanism (60).
  • the casing side mounting portion (105) has a higher surface temperature than the surroundings of the expansion mechanism (60), and more than the surroundings of the casing (31) in the vicinity of the portion and the expansion mechanism (60). You may arrange
  • the casing-side mounting portion (105) should be provided avoiding the portion A having the highest surface temperature of the casing (31). ! / Since the temperature of the casing (31) is inevitably lowered between the inflow pipe (38) and the outflow pipe (39), it is preferable to provide the casing side mounting portion (105) at this position. With this configuration, the casing-side mounting portion (105) at one end of the heat transfer path in the mounting plate (101) is connected to the surface temperature of the expansion mechanism (60) and the casing ( 31), the heat input from the high temperature side to the low temperature side is reduced.
  • a heat insulating material is used between the mechanism side mounting portion (104) and the joint portion (67) joined to the mechanism side mounting portion (104) in the expansion mechanism (60).
  • a heat insulating spacer (110) may be arranged. The insulation spacer (110) is always installed near the expansion mechanism (60), which is kept at a relatively low temperature. High degree.
  • This configuration increases the thermal resistance between the mounting plate (101) and the expansion mechanism (60), so that heat exchange between the expansion mechanism (60) and the casing (31) can be achieved. Is reduced. For this reason, heat exchange due to heat conduction between the low-temperature refrigerant inside the expansion mechanism (60) and the high-temperature refrigerant inside the compression mechanism (50) is reduced. Accordingly, it is possible to prevent a reduction in the capacity of the compression / expansion unit (30) and a reduction in the power recovery effect.
  • the present invention may be configured as follows with respect to the above embodiment.
  • the high-pressure dome type compression / expansion unit (30) is used.
  • the refrigerant circuit (20) force and the refrigerant are directly introduced into the compression mechanism (50), and the compressed refrigerant is directly discharged out of the casing (31).
  • the compression mechanism (50) is fixed to the casing (31) via a mounting plate (101) having a shape similar to that of the above embodiment and having a high thermal resistance.
  • the expansion mechanism (60) is constituted by a swinging piston type rotary expander.
  • the expansion mechanism (60) may be constituted by a rolling piston type rotary expander. Good.
  • the blades (76, 86) are formed separately from the pistons (75, 85) in each rotary mechanism (70, 80). The tip of the blade (76, 86) is pressed against the outer peripheral surface of the piston (75, 85), and moves forward and backward as the piston (75, 85) moves.
  • the compression mechanism (50) is a swinging piston type rotary compressor and the expansion mechanism (60) is a swinging piston type rotary expander. It may be a thing.
  • the thermal conductivity of the resin-based material composing the general heat insulating material (90, 96) is 0.3 w / m—k, whereas the thermal conductivity of the carbon dioxide refrigerant is in the space on the expansion mechanism (60) side.
  • the carbon dioxide refrigerant is one order lower than the resin material.
  • the heat transfer coefficient of the gas refrigerant is smaller than that of the heat insulating material (90, 96), the heat exchange is rather reduced.
  • the mechanism-side mounting portion (104) and the casing-side mounting portion (105) are provided at three locations at equal intervals in the circumferential direction, but two or four or more locations are provided. Also good. Even in this case, the mechanism-side mounting portion (104) and the casing-side mounting portion (105) are preferably arranged in a circumferential direction.
  • the first and second heat insulating materials (90, 96) are formed of high heat resistance! /, Special engineering plastic, but the temperature comparison as in the first embodiment.
  • the refrigerant temperature is 100 ° C or lower, so it may be formed of low heat resistance / general-purpose engineering plastic.
  • POM polyacetal
  • Epoxy and FRP may also be used, but FRP has the disadvantage that the thermal conductivity increases when carbon, glass fiber, or the like is contained.
  • the refrigerant is carbon dioxide, but R410A, R407C, or isobutane may be used.
  • the electric motor (4) is disposed above the compression mechanism (50) in the second space (49).
  • Placed force S may be placed under the compression mechanism (50)! /.
  • the present invention is useful for a fluid machine in which a compression mechanism and an expansion mechanism are housed in one casing.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
  • Compressor (AREA)

Abstract

Un mécanisme de compression (50) pour comprimer un frigorigène, un mécanisme de détente (60) pour détendre le frigorigène, et un arbre rotatif (40) reliant le mécanisme de compression (50) et le mécanisme de détente (60), sont installés dans un boîtier (31). Le mécanisme de détente (60) est fixé au boîtier au moyen d'une plaque de montage (101).
PCT/JP2007/072576 2006-11-24 2007-11-21 Appareillage pour fluide WO2008062839A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP07832306.0A EP2098730B1 (fr) 2006-11-24 2007-11-21 Appareillage pour fluide
ES07832306.0T ES2536770T3 (es) 2006-11-24 2007-11-21 Máquina de fluido

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2006317127A JP4997935B2 (ja) 2006-11-24 2006-11-24 流体機械
JP2006-317127 2006-11-24

Publications (1)

Publication Number Publication Date
WO2008062839A1 true WO2008062839A1 (fr) 2008-05-29

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Application Number Title Priority Date Filing Date
PCT/JP2007/072576 WO2008062839A1 (fr) 2006-11-24 2007-11-21 Appareillage pour fluide

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Country Link
EP (1) EP2098730B1 (fr)
JP (1) JP4997935B2 (fr)
ES (1) ES2536770T3 (fr)
WO (1) WO2008062839A1 (fr)

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Publication number Priority date Publication date Assignee Title
DE102012019040B4 (de) * 2012-09-28 2014-08-14 Harald Teinzer Scrollmotor

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5185309U (fr) * 1974-12-28 1976-07-08
JPS60132094A (ja) * 1983-12-21 1985-07-13 Matsushita Electric Ind Co Ltd 密閉型回転圧縮機
JPH02123296A (ja) * 1988-10-31 1990-05-10 Toshiba Corp ロータリコンプレッサ
JP2005240562A (ja) * 2004-02-24 2005-09-08 Nippon Soken Inc スクロール型圧縮機
JP2006132329A (ja) * 2004-11-02 2006-05-25 Daikin Ind Ltd 流体機械
JP2006257884A (ja) * 2005-03-15 2006-09-28 Daikin Ind Ltd 容積型膨張機

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4462023B2 (ja) * 2003-09-08 2010-05-12 ダイキン工業株式会社 ロータリ式膨張機
JP4517684B2 (ja) * 2004-03-10 2010-08-04 ダイキン工業株式会社 ロータリ式膨張機

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5185309U (fr) * 1974-12-28 1976-07-08
JPS60132094A (ja) * 1983-12-21 1985-07-13 Matsushita Electric Ind Co Ltd 密閉型回転圧縮機
JPH02123296A (ja) * 1988-10-31 1990-05-10 Toshiba Corp ロータリコンプレッサ
JP2005240562A (ja) * 2004-02-24 2005-09-08 Nippon Soken Inc スクロール型圧縮機
JP2006132329A (ja) * 2004-11-02 2006-05-25 Daikin Ind Ltd 流体機械
JP2006257884A (ja) * 2005-03-15 2006-09-28 Daikin Ind Ltd 容積型膨張機

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP2098730A4 *

Also Published As

Publication number Publication date
EP2098730A4 (fr) 2014-02-19
ES2536770T3 (es) 2015-05-28
JP4997935B2 (ja) 2012-08-15
EP2098730B1 (fr) 2015-03-04
JP2008128183A (ja) 2008-06-05
EP2098730A1 (fr) 2009-09-09

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