WO2018078787A1 - スクロール圧縮機、冷凍サイクル装置およびシェル - Google Patents
スクロール圧縮機、冷凍サイクル装置およびシェル Download PDFInfo
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- WO2018078787A1 WO2018078787A1 PCT/JP2016/082030 JP2016082030W WO2018078787A1 WO 2018078787 A1 WO2018078787 A1 WO 2018078787A1 JP 2016082030 W JP2016082030 W JP 2016082030W WO 2018078787 A1 WO2018078787 A1 WO 2018078787A1
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- shell
- scroll
- wall surface
- scroll compressor
- compressor according
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- 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
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- 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
- F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
- F04C18/02—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
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- 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
- F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
- F04C18/02—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
- F04C18/0207—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents both members having co-operating elements in spiral form
- F04C18/0215—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents both members having co-operating elements in spiral form where only one member is moving
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- 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
- F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
- F04C18/02—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
- F04C18/0207—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents both members having co-operating elements in spiral form
- F04C18/0246—Details concerning the involute wraps or their base, e.g. geometry
- F04C18/0253—Details concerning the base
- F04C18/0261—Details of the ports, e.g. location, number, geometry
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- 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
- F04C2230/20—Manufacture essentially without removing material
- F04C2230/23—Manufacture essentially without removing material by permanently joining parts together
- F04C2230/231—Manufacture essentially without removing material by permanently joining parts together by welding
-
- 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
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- 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
- F04C2240/00—Components
- F04C2240/30—Casings or housings
-
- 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
- F04C2240/00—Components
- F04C2240/80—Other components
- F04C2240/806—Pipes for fluids; Fittings therefor
-
- 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
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- 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
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- F04C29/02—Lubrication; Lubricant separation
- F04C29/028—Means for improving or restricting lubricant flow
Definitions
- This invention relates to a fixed structure of a fixed scroll in a scroll compressor.
- a swing scroll is supported by a frame fixed inside the shell, and a fixed scroll is provided facing the swing scroll.
- a crankshaft is attached to the orbiting scroll. By rotating the crankshaft, the orbiting scroll is caused to orbit with respect to the fixed scroll, and the refrigerant is discharged in a compression chamber formed by the orbiting scroll and the fixed scroll. Compress. (For example, refer to Patent Document 1).
- the peripheral wall of the frame extends in the direction of the fixed scroll, and the fixed scroll is fixed by a bolt or the like at the tip of the peripheral wall. Since a compression chamber for compressing refrigerant is formed between the fixed scroll and the orbiting scroll, the position accuracy of the fixed scroll with respect to the orbiting scroll is important. Conventionally, the fixed scroll is fixed to the tip of the peripheral wall of the frame. Therefore, it was possible to ensure the positional accuracy.
- the present invention has been made to solve the above-described problems, and is a scroll compressor capable of arranging a fixed scroll with high positional accuracy in a shell without forming a peripheral wall for fixing the fixed scroll to the frame.
- An object of the present invention is to provide a refrigeration cycle apparatus and a shell.
- a scroll compressor includes a frame that slidably holds a swing scroll, a fixed scroll that forms a compression chamber together with the swing scroll, and a shell that houses the frame and the fixed scroll.
- the shell has a first inner wall surface and a first projecting portion that projects from the first inner wall surface and positions the fixed scroll, and the fixed scroll is fixed to the first inner wall surface.
- the fixed scroll can be disposed in the shell with high positional accuracy without forming a peripheral wall for fixing the fixed scroll to the frame.
- FIG. 1 is a longitudinal schematic cross-sectional view of a scroll compressor according to Embodiment 1 of the present invention.
- 1 is an exploded perspective view of a main frame, a swing scroll, and the like of a scroll compressor according to Embodiment 1 of the present invention. It is an enlarged view of the area
- FIG. 1 is a schematic vertical sectional view of the scroll compressor according to the first embodiment.
- FIG. 2 is an exploded perspective view of the main frame, the orbiting scroll, and the like of the scroll compressor according to Embodiment 1 of the present invention.
- FIG. 3 is an enlarged view of the region of the alternate long and short dash line in FIG.
- the compressor in FIG. 1 is a so-called vertical scroll compressor that is used in a state in which the center axis of the crankshaft is substantially perpendicular to the ground.
- the scroll compressor includes a shell 1, a main frame 2, a compression mechanism unit 3, a drive mechanism unit 4, a subframe 5, a crankshaft 6, a bush 7, and a power feeding unit 8.
- the side (upper side) on which the compression mechanism unit 3 is provided is oriented to one end U and the side (lower side) on which the drive mechanism unit 4 is provided to the other end L. explain.
- the shell 1 is a cylindrical casing made of a conductive member such as metal and closed at both ends, and includes a main shell 11, an upper shell 12, and a lower shell 13.
- the main shell 11 has a cylindrical shape, and a suction pipe 14 is connected to the side wall thereof by welding or the like.
- the suction pipe 14 is a pipe for introducing a refrigerant into the shell 1 and communicates with the main shell 11.
- the upper shell 12 is a substantially hemispherical first shell, and a part of the side wall thereof is connected to the upper end portion of the main shell 11 by welding or the like, and covers the upper opening of the main shell 11.
- a discharge pipe 15 is connected to the upper part of the upper shell 12 by welding or the like.
- the discharge pipe 15 is a pipe for discharging the refrigerant to the outside of the shell 1 and communicates with the internal space of the main shell 11.
- the lower shell 13 is a second shell having a substantially hemispherical shape, and a part of the side wall thereof is connected to the lower end portion of the main shell 11 by welding or the like through the connection shell 16, and the lower opening of the main shell 11 is opened. Covering.
- the shell 1 is supported by a fixing base 17 having a plurality of screw holes. A plurality of screw holes are formed in the fixing base 17, and the scroll compressor can be fixed to other members such as a casing of the outdoor unit by screwing screws into these screw holes.
- the main frame 2 is a hollow metal frame in which a cavity is formed, and is provided inside the shell 1.
- the main frame 2 includes a main body portion 21, a main bearing portion 22, and an oil return pipe 23.
- the main body 21 is fixed to the inner wall surface of the one end U of the main shell 11, and an accommodation space 211 is formed at the center along the longitudinal direction of the shell 1.
- the accommodation space 211 has a stepped shape in which one end U is open and the space narrows toward the other end L.
- An annular flat surface 212 is formed on one end U of the main body 21 so as to surround the accommodation space 211.
- a ring-shaped thrust plate 24 made of a steel plate material such as valve steel is disposed on the flat surface 212.
- the thrust plate 24 functions as a thrust bearing.
- a suction port 213 is formed at a position that does not overlap the thrust plate 24 on the outer end side of the flat surface 212.
- the suction port 213 is a space penetrating in the vertical direction of the main body 21, that is, the upper shell 12 side and the lower shell 13 side.
- the number of suction ports 213 is not limited to one, and a plurality of suction ports may be formed.
- An Oldham accommodating portion 214 is formed in a step portion on the other end side L from the flat surface 212 of the main frame 2.
- a first Oldham groove 215 is formed in the Oldham accommodating portion 214.
- the first Oldham groove 215 is formed so that a part of the outer end side is shaved on the inner end side of the flat surface 212. Therefore, when the main frame 2 is viewed from the one end side U, a part of the first Oldham groove 215 overlaps with the thrust plate 24.
- the first Oldham groove 215 is formed so that a pair faces each other.
- the main bearing portion 22 is continuously formed on the other end side L of the main body portion 21, and a shaft hole 221 is formed therein.
- the shaft hole 221 penetrates in the vertical direction of the main bearing portion 22, and its one end U communicates with the accommodation space 211.
- the oil return pipe 23 is a pipe for returning the lubricating oil accumulated in the accommodation space 211 to the oil sump inside the lower shell 13, and is inserted and fixed in an oil drain hole formed through the inside and outside of the main frame 2. .
- Lubricating oil is refrigeration oil containing ester synthetic oil, for example.
- the lubricating oil is stored in the lower part of the shell 1, that is, in the lower shell 13, sucked up by an oil pump 52 described later, passes through an oil passage 63 in the crankshaft 6, and mechanically contacts the compression mechanism unit 3 and the like. Reduces wear between parts to be used, adjusts the temperature of sliding parts, and improves sealing performance.
- As the lubricating oil an oil having an appropriate viscosity as well as excellent lubrication characteristics, electrical insulation, stability, refrigerant solubility, low-temperature fluidity and the like is suitable.
- the compression mechanism unit 3 is a compression mechanism that compresses the refrigerant.
- the compression mechanism unit 3 is a scroll compression mechanism that includes a fixed scroll 31 and a swing scroll 32.
- the fixed scroll 31 is made of a metal such as cast iron, and includes a first substrate 311 and a first spiral body 312.
- the first substrate 311 has a disk shape, and a discharge port 313 is formed through the center in the vertical direction.
- the first spiral body 312 protrudes from the surface on the other end side L of the first substrate 311 to form a spiral wall, and its tip protrudes to the other end side L.
- the orbiting scroll 32 is made of a metal such as aluminum and includes a second substrate 321, a second spiral body 322, a cylindrical portion 323, and a second Oldham groove 324.
- the second substrate 321 is located on the one surface on which the first spiral body 312 is formed, the other surface in which at least a part of the outer peripheral region becomes the sliding surface 3211, and the outermost surface in the radial direction. And a side surface 3212 connecting the other surface, and the sliding surface 3211 is supported (supported) on the main frame 2 so as to be slidable on the thrust plate 24.
- the second spiral body 322 projects from one surface of the second substrate 321 to form a spiral wall, and its tip projects to one end U.
- a seal member for suppressing leakage of the refrigerant is provided at the distal end portion of the first spiral body 312 of the fixed scroll 31 and the second spiral body 322 of the swing scroll 32.
- the cylindrical portion 323 is a cylindrical boss formed to protrude from the approximate center of the other surface of the second substrate 321 to the other end L.
- a rocking bearing for rotatably supporting a slider 71 described later a so-called journal bearing is provided so that its central axis is parallel to the central axis of the crankshaft 6.
- the second Oldham groove 324 is a long round groove formed on the other surface of the second substrate 321.
- the second Oldham groove 324 is provided so that a pair faces each other.
- a line connecting the pair of second Oldham grooves 324 is provided so as to be orthogonal to a line connecting the pair of first Oldham grooves 215.
- An Oldham ring 33 is provided in the Oldham accommodating portion 214 of the main frame 2.
- the Oldham ring 33 includes a ring portion 331, a first key portion 332, and a second key portion 333.
- the ring part 331 has a ring shape.
- the first key portion 332 is formed so that a pair faces the surface on the other end side L of the ring portion 331, and is accommodated in the pair of first Oldham grooves 215 of the main frame 2.
- the second key portion 333 is formed so that a pair faces the surface on one end side U of the ring portion 331, and is accommodated in the pair of second Oldham grooves 324 of the orbiting scroll 32.
- the compression chamber 34 is formed by meshing the first spiral body 312 of the fixed scroll 31 and the second spiral body 322 of the swing scroll 32 with each other. Since the volume of the compression chamber 34 decreases in the radial direction from the outside toward the inside, the compression chamber 34 is gradually compressed by taking the refrigerant from the outer end side of the spiral body and moving it to the center side.
- the compression chamber 34 communicates with the discharge port 313 at the center of the fixed scroll 31.
- a muffler 35 having a discharge hole 351 is provided on the surface of one end U of the fixed scroll 31, and a discharge valve 36 that opens and closes the discharge hole 351 to prevent the refrigerant from flowing backward is provided.
- the refrigerant is composed of, for example, a halogenated hydrocarbon having a carbon double bond, a halogenated hydrocarbon having no carbon double bond, a hydrocarbon, or a mixture containing them.
- Halogenated hydrocarbons having a carbon double bond are HFC refrigerants and chlorofluorocarbon low GWP refrigerants having an ozone layer depletion coefficient of zero.
- Examples of the low GWP refrigerant include HFO refrigerant, and examples thereof include tetrafluoropropene such as HFO1234yf, HFO1234ze, and HFO1243zf whose chemical formula is represented by C3H2F4.
- Examples of the halogenated hydrocarbon having no carbon double bond include a refrigerant in which R32 (difluoromethane), R41, and the like represented by CH2F2 are mixed.
- Examples of the hydrocarbon include natural refrigerants such as propane and propylene.
- Examples of the mixture include a mixed refrigerant obtained by mixing R32, R41, and the like with HFO1234yf, HFO1234ze, HFO1243zf, and the like.
- the drive mechanism 4 is provided on the other end L of the main frame 2 inside the shell 1.
- the drive mechanism unit 4 includes a stator 41 and a rotor 42.
- the stator 41 is a stator formed by winding a winding around an iron core formed by laminating a plurality of electromagnetic steel plates, for example, via an insulating layer, and is formed in a ring shape.
- the stator 41 is fixedly supported inside the main shell 11 by shrink fitting or the like.
- the rotor 42 is a cylindrical rotor having a built-in permanent magnet inside an iron core formed by laminating a plurality of electromagnetic steel plates and having a through-hole penetrating in the vertical direction in the center, and is disposed in the internal space of the stator 41. ing.
- the subframe 5 is a metal frame and is provided on the other end side L of the drive mechanism 4 inside the shell 1.
- the subframe 5 is fixedly supported on the inner peripheral surface of the other end L of the main shell 11 by shrink fitting or welding.
- the sub frame 5 includes a sub bearing portion 51 and an oil pump 52.
- the sub bearing portion 51 is a ball bearing provided on the upper side of the center portion of the sub frame 5 and has a hole penetrating in the vertical direction at the center.
- the oil pump 52 is provided below the central portion of the sub-frame 5 and is disposed so that at least a part of the oil pump 52 is immersed in the lubricating oil stored in the oil reservoir of the shell 1.
- the crankshaft 6 is a long metal rod-like member and is provided inside the shell 1.
- the crankshaft 6 includes a main shaft portion 61, an eccentric shaft portion 62, and an oil passage 63.
- the main shaft portion 61 is a shaft constituting a main portion of the crankshaft 6, and is arranged so that the central axis thereof coincides with the central axis of the main shell 11.
- the main shaft portion 61 has a rotor 42 in contact with the outer surface thereof.
- the eccentric shaft part 62 is provided on one end side U of the main shaft part 61 so that the central axis is eccentric with respect to the central axis of the main shaft part 61.
- the oil passage 63 is vertically provided through the main shaft portion 61 and the eccentric shaft portion 62.
- one end side U of the main shaft portion 61 is inserted into the main bearing portion 22 of the main frame 2, and the other end side L is inserted and fixed to the sub bearing portion 51 of the subframe 5.
- the eccentric shaft portion 62 is disposed in the cylinder of the cylindrical portion 323, and the rotor 42 is disposed such that the outer peripheral surface thereof maintains a predetermined gap from the inner peripheral surface of the stator 41.
- a first balancer 64 is provided at one end U of the main shaft 61 and a second balancer 65 is provided at the other end L in order to cancel out the imbalance caused by the swing of the swing scroll 32.
- the bush 7 is made of a metal such as iron and is a connecting member that connects the orbiting scroll 32 and the crankshaft 6.
- the bush 7 is composed of two parts in the present embodiment, and includes a slider 71 and a balance weight 72.
- the slider 71 is a cylindrical member in which a flange is formed, and is fitted into each of the eccentric shaft portion 62 and the cylindrical portion 323.
- the balance weight 72 is a donut-shaped member having a weight portion 721 having a substantially C shape as viewed from the one end side U as shown in FIG. 2, in order to cancel the centrifugal force of the orbiting scroll 32. Eccentric with respect to the center of rotation.
- the balance weight 72 is fitted to the flange of the slider 71 by a method such as shrink fitting.
- the power supply unit 8 is a power supply member that supplies power to the scroll compressor, and is formed on the outer peripheral surface of the main shell 11 of the shell 1.
- the power supply unit 8 includes a cover 81, a power supply terminal 82, and a wiring 83.
- the cover 81 is a cover member having a bottomed opening.
- the power supply terminal 82 is made of a metal member, and one is provided inside the cover 81 and the other is provided inside the shell 1.
- One of the wires 83 is connected to the power supply terminal 82 and the other is connected to the stator 41.
- FIGS. 4 is an enlarged view of a region indicated by a two-dot chain line in FIG.
- the shell 1 includes a first inner wall surface 111, a first projecting portion 112 that projects from the first inner wall surface 111 and positions the fixed scroll 31, and the first projecting portion 112 on the upper shell 12 side. And a first positioning surface 113 that faces the surface. That is, the main shell 11 includes a stepped portion whose inner diameter increases toward the other end side L.
- the fixed scroll 31 is fixed to the first inner wall surface 111 by shrink fitting or the like while being positioned on the first positioning surface 113. This structure eliminates the need for a wall for fixing the fixed scroll 31 to the main frame 2 as in the prior art.
- the wall of the main frame 2 is not interposed between the side surface 3212 of the second substrate 321 of the swing scroll 32 and the inner wall surface of the main shell 11, and the side surface 3212 of the second substrate 321 and the inner wall surface of the main shell 11 are Are arranged to face each other. Therefore, the refrigerant intake space 37 provided between the first substrate 311 of the fixed scroll 31 and the thrust bearing of the main frame 2 in the main shell 11 and in which the orbiting scroll 32 is disposed can be expanded as compared with the conventional case. . Further, since the structure of the main frame 2 is simplified, the workability is improved and the weight can be reduced.
- the present invention is a refrigeration cycle apparatus that includes the scroll compressor, the condenser, the expansion valve, and the evaporator of the present invention and circulates the refrigerant, and uses a high-pressure refrigerant that increases the burden on the thrust bearing because it includes R32. Even in this case, the reliability can be improved.
- the fixed scroll 31 is moved between the upper shell 12 and the first positioning surface 113 of the first projecting portion 112. It is comprised so that it may pinch
- the main frame 2 is also fixed to the second inner wall surface 114 by shrinkage fitting or the like in a state where the main frame 2 is positioned by the second positioning surface 116 of the second projecting portion 115 projecting from the second inner wall surface 114 of the shell 1. .
- FIG. 5 is a view of the main frame 2 as viewed from above.
- a ring-shaped protruding wall 216 that protrudes toward the upper shell 12 is formed at the outer end of the flat surface 212 of the main frame 2.
- the thrust plate 24 is arranged on the flat surface 212 inside the protruding wall 216 so as to cover a part of the first Oldham groove 215.
- the height h of the protruding wall 216 from the flat surface 212 is set to be smaller than the thickness d of the thrust plate 24, so that the orbiting scroll 32 can slide with the thrust plate 24. .
- the thickness d of the thrust plate 24 is usually about 0.5 mm, but if a thickness d of about 0.6 mm is used, the spiral tip gap can be reduced, and the coolant can flow between the spiral tip and the substrate. Leakage into the adjacent compression space through the gap can be suppressed.
- convex portions or concave portions are formed on the thrust plate 24 and the protruding wall 216, and the convex portions and the concave portions are engaged so that rotation of the thrust plate 24 can be suppressed.
- the flat surface 212 and the thrust plate 24 of the main frame 2 are both ring-shaped, and the thrust plate 24 may rotate with respect to the flat surface 212 as the swing scroll 32 swings. The rotation is suppressed by engaging the convex portion with the concave portion.
- the convex portion includes a pair of protrusions 217 formed to protrude from the protrusion wall 216 in the direction of the thrust plate 24, and the concave portion includes a notch 241 formed on the outer peripheral portion of the thrust plate 24.
- the pair of protrusions 217 are provided so as to be engaged with opposite sides of the notch 241.
- a suction port 213 is disposed in a portion located between the pair of protrusions 217 of the main frame 2. That is, since the suction port 213 is arranged in the notch 241 portion, the refrigerant can be taken into the refrigerant take-in space 37 without being blocked by the thrust plate 24.
- the refrigerant sucked into the shell 1 from the suction pipe 14 reaches the refrigerant intake space 37 through the suction port 213 of the main frame 2 and swings with the fixed scroll 31. It is taken into a compression chamber 34 formed by the moving scroll 32. Then, the refrigerant is compressed by reducing the volume while moving from the outer peripheral portion toward the center along with the eccentric revolving motion of the orbiting scroll 32.
- the orbiting scroll 32 moves in the radial direction together with the bush 7 by its centrifugal force, and the side walls of the second spiral body 322 and the first spiral body 312 are in close contact with each other.
- the compressed refrigerant reaches the discharge hole 351 of the fixed scroll 31 from the discharge port 313 of the fixed scroll 31, and is discharged outside the shell 1 against the discharge valve 36.
- FIG. 6 is a diagram for explaining a method of manufacturing the main shell.
- FIG. 6 shows a cross section of one wall of the main shell 2 in an easy-to-understand manner, and differs from actual dimensions and thicknesses.
- a cutting brush or the like is inserted from one end U of the main shell 11 as shown in (a), the inner wall surface is cut by a predetermined depth in the thickness direction, and the second as shown in (b).
- a step is formed by the inner wall surface 114 and the second protrusion 115.
- the thickness of the main shell 11 is, for example, 4 to 6 mm, and the height of the protrusion, that is, the depth of cutting by cutting, is, for example, about 0.3 mm.
- the inner wall surface 111 is formed by cutting the inner wall surface by a predetermined depth in the thickness direction with a cutting brush or the like on the second inner wall surface 114 that is a predetermined distance away from the second protrusion 115 in the direction of the upper shell 12 ( As shown in c), a step is formed by the first inner wall surface 111 and the first protrusion 112. For this reason, the inner diameter r1 of the first inner wall surface 111 is larger than the inner diameter r2 of the second inner wall surface 114.
- the first protrusion 112 is formed in the direction of the upper shell 12 relative to the second protrusion 115, and the inner wall surface of the first protrusion 112 also serves as the second inner wall surface 114. Note that the second protrusion 115 may be formed after the first protrusion 112 is formed.
- connection portion (the first inner wall surface 111 side of the first positioning surface 113) of the first protrusion 112 with the first inner wall surface 111, and the second protrusion 115.
- Dent 1131 having a shape recessed in the direction of the lower shell 13 by processing the outer diameter with a rhombus insert or the like on the connecting portion with the second inner wall surface 114 (on the second inner wall surface 114 side of the second positioning surface 116), 1161 are formed.
- the dents 1131 and 1161 are so-called pussies that remove a curved surface that is likely to be generated in the connecting portion by cutting.
- connection portion between the first inner wall surface 111 and the first positioning surface 113 is not a right angle, and a radius is likely to be formed. If a rounded portion is formed in the portion, even if the fixed scroll 31 is disposed on the first projecting portion 112, it floats without contacting the first positioning surface 113, and the positioning accuracy is lowered. On the other hand, by forming the recess 1131, the fixed scroll 31 reliably contacts the first positioning surface 113, so that the positioning accuracy can be increased. The same applies to the recess 1161, and the positioning accuracy of the main frame 2 can be increased.
- the recesses 1131 and 1161 are recessed in the direction of the lower shell 13, compared with the case where the recesses are formed in the radial direction of the main shell, it is possible to suppress a decrease in the thickness of the main shell 11. Can be suppressed.
- the main frame 2 is inserted from one end side U of the main shell 11 formed as described above.
- the main frame 2 is in surface contact with the second positioning surface 116 of the second protrusion 115 and is positioned in the height direction.
- the main frame 2 is fixed to the second inner wall surface 114 by shrink fitting, arc spot welding, or the like.
- the bush 7 is attached to the eccentric shaft portion 62, and the Oldham ring 33, the swing scroll 32, and the like are disposed.
- the fixed scroll 31 is inserted from one end U of the main shell 11.
- the fixed scroll 31 is in surface contact with the first positioning surface 113 of the first protrusion 112 and is positioned in the height direction.
- the fixed scroll 31 is fixed with respect to the orbiting scroll 32 until the fixed scroll 31 is fixed to the first inner wall surface 111.
- the fixed scroll 31 is rotatable, and the positional relationship between the first spiral body 312 and the second spiral body 322 is shifted, and there is a possibility that a variation in compression or a defective compression occurs in each scroll compressor product.
- the fixed scroll 31 is rotated to adjust the phase so that the positional relationship of the first spiral body 312 with respect to the second spiral body 322 of the orbiting scroll 32 is predetermined, and then the fixed scroll 31 is moved to the first inner wall surface 111. Fix by shrink fitting or arc spot welding.
- the main shell 11 and the upper shell 12 are fixed by welding, arc spot welding, or the like.
- the fixed scroll 31 is inserted into the upper shell 12 so as to be pressed against the first positioning surface 113, and the fixed scroll 31 is fixed to the main shell 11 while maintaining the state.
- the variation in the height of the intake space 37 is suppressed, the positional accuracy is increased, and the fixed scroll 31 is prevented from shifting in the vertical direction when the scroll compressor is driven.
- the first protrusion 112 only needs to be positioned at least for manufacturing the fixed scroll 31, the fixed scroll 31 comes into contact with the first positioning surface 113 after the fixed scroll 31 is fixed to the first inner wall surface 111. It is not essential to be. The same applies to the relationship between the main frame 2 and the second protrusion 115.
- the main frame 2 that slidably holds the orbiting scroll 32, the fixed scroll 31 that forms the compression chamber 34 together with the orbiting scroll 32, and the shell 1 that houses the fixed scroll 31 are provided.
- the shell 1 has a first inner wall surface 111 and a first protrusion 112 that protrudes from the first inner wall surface 111 and on which the fixed scroll 31 is positioned.
- the fixed scroll 31 is fixed to the first inner wall surface 111. Therefore, the side surface 3212 located on the outermost side in the radial direction of the orbiting scroll 32 and the inner wall surface of the shell 1 face each other, and the main frame 2 is connected to the side surface 3212 of the second substrate 321 and the inner wall surface of the main shell 11. It becomes a structure which does not interpose between.
- the fixed scroll 31 can be disposed in the shell 1 without forming a peripheral wall for fixing the fixed scroll 31 in the main frame 2, and the refrigerant intake space 37 in which the swing scroll 32 is disposed is enlarged. be able to.
- the wall for fixing the fixed scroll 31 to the main frame 2 becomes unnecessary, the processing time of the main frame 2 can be shortened and weight reduction can also be achieved.
- the shell 1 further includes a second inner wall surface 114 and a second projecting portion 115 that protrudes from the second inner wall surface 114 and is positioned on the main frame 2.
- the main frame 2 is fixed to the second inner wall surface 114. Has been. Therefore, both the fixed scroll 31 and the main frame 2 can be fixed to the shell 1 by a similar method in a series of manufacturing steps, and manufacturing can be facilitated.
- the second inner wall surface 114 is formed on the inner wall surface of the first protrusion 112. That is, the inner wall surface of the first protrusion 112 also serves as the second inner wall surface 114. Therefore, the 1st protrusion part 112 and the 2nd protrusion part 115 can be formed with few processes. Also, the inner diameter r1 of the first inner wall surface 111 is formed larger than the inner diameter r2 of the second inner wall surface 114, and the shell 1 is an upper covering the main shell 11 having both ends opened and the opening on one end side of the main shell 11.
- the first positioning surface 113 is formed, and the second positioning surface 116 for positioning the main frame 2 is formed on the upper shell 12 side of the second projecting portion 115. Therefore, the fixed scroll 31 and the main frame are disposed on the main shell 11. Since 2 can be fixed by the same method, assembly can be facilitated.
- the first positioning surface 113 is formed in the direction of the upper shell 12 relative to the sliding surface 3211 of the swing scroll 32 that slides on the main frame 2, and the second positioning surface 116 is lower than the sliding surface 3211. It is formed in 13 directions. Therefore, after the main frame 2 is inserted and fixed to the main shell 11 from the one end side U, the main shell 11 can be sequentially inserted and fixed in the same posture, so that the assembly is facilitated. be able to.
- Dents 1131 and 1161 are formed in the direction of the lower shell at the connecting portion of the first projecting portion 112 with the first inner wall surface 111 and the connecting portion of the second projecting portion 115 with the second inner wall surface 114. Therefore, the contact between the first positioning surface 113 and the fixed scroll 31 and the contact between the second positioning surface 116 and the main frame 2 can be kept good, and the positioning accuracy can be increased.
- the outer diameter of the upper shell 12 is smaller than the inner diameter on one end side of the main shell 11, and the upper shell 12 sandwiches the fixed scroll 31 between the first protrusions 112. Therefore, the fixed scroll 31 can be pressed so as to be surely brought into contact with the first positioning surface 113. Further, the vertical movement of the fixed scroll 31 with respect to the main shell 11 can be suppressed.
- the main frame 2 has a thrust plate 24 that slides with a sliding surface 3211 on a flat surface 212 that faces the orbiting scroll 32, and an outer end of the flat surface 212 of the main frame 2 has an upper shell 12.
- a protruding wall 216 protruding in the direction is formed, and the height h of the protruding wall 216 from the flat surface 212 is smaller than the thickness d of the thrust plate 24. Therefore, the orbiting scroll 32 can be slid on the thrust plate 24 without interfering with the main frame 2.
- the thrust plate 24 and the protruding wall 216 are formed with a convex portion or a concave portion, and the convex portion and the concave portion are engaged so that rotation of the thrust plate can be suppressed.
- the protrusions are a pair of protrusions 217 formed protruding from the protrusion wall 216 in the direction of the thrust plate 24, the recesses are notches 241 formed in the outer peripheral portion of the thrust plate, and the pair of protrusions 217 are It is provided in the notch 241. Therefore, the thrust plate 24 can be prevented from rotating with respect to the flat surface 212 of the main frame 2.
- a suction port 213 is formed between the pair of protrusions 217 of the frame so as to penetrate in the direction of the upper shell 12 and the direction of the lower shell 13. Therefore, the suction port 213 can be prevented from being blocked by the thrust plate 24, and the refrigerant can be stably supplied to the refrigerant intake space 37.
- a refrigeration cycle apparatus that includes a scroll compressor, a condenser, an expansion valve, and an evaporator and circulates a refrigerant, and a high-pressure refrigerant containing, for example, R32 may be used as the refrigerant.
- a high-pressure refrigerant containing R32 or the like is used, the burden on the thrust bearing is increased.
- the diameter of the second substrate 321 and the thrust plate 24 of the orbiting scroll 32 is increased to increase the sliding area. Since it can be increased, the burden on the thrust bearing can be reduced and the reliability can be improved.
- FIG. FIG. 7 is a cross-sectional view of the scroll compressor according to Embodiment 2 of the present invention
- FIG. 8 is an enlarged view of a two-dot chain line region of FIG.
- the main shell 11A has a stepped shape including a first straight pipe portion 117A, a second straight pipe portion 118A, and a connecting portion 119A.
- the first straight pipe portion 117A is provided on one end side U of the main shell 11A.
- the second straight pipe portion 118A has an outer diameter R2 that is smaller than the outer diameter R1 of the first straight pipe portion 117A, and is provided on the other end side L of the first straight pipe portion 117A.
- the connecting portion 119A changes such that the outer wall surface diameter increases from the second straight pipe portion 118A toward the first straight pipe portion 117A, and connects the first straight pipe portion 117A and the second straight pipe portion 118A. It is out.
- the second inner wall surface 114A is formed on the inner wall surface of the connecting portion 119A.
- the outer wall surface of the connecting portion 119A has a shape whose outer diameter changes, but the inner wall has a flat surface along the central axis of the crankshaft 6.
- the second inner wall surface 114A is formed to be flush with the inner walls of the first straight pipe portion 117A, the second straight pipe portion 118A, and the connecting portion 119A.
- a second projecting portion 115A projects from the second inner wall surface 114A on the other end side L of the connecting portion 19, and a second positioning surface 116A is formed on one end side U of the second projecting portion 115A.
- 11A is fixed to the second inner wall surface 114A while being positioned by the second protrusion 115A.
- the first inner wall surface 111A is formed on the inner wall surface of the first straight pipe portion 117A.
- FIG. 9 is a diagram for explaining a method of manufacturing the main shell according to Embodiment 2 of the present invention.
- FIG. 9 shows a cross section of one wall of the main shell 2 in an easy-to-understand manner and differs from actual dimensions and thicknesses.
- a press machine is inserted from one end side U of the main shell 11A formed in a cylindrical shape as shown in (a), and press processing or the like is performed on the main shell 11A.
- a cutting brush or the like is inserted from one end side U of the main shell 11A, and a part of inner wall surfaces of the connecting portion 119A and the second straight pipe portion 118A are cut in the thickness direction, whereby the second inner wall surface 114A. And the level
- the inner diameter r3 of the cut connecting portion 119A and the second straight pipe portion 118A is made smaller than the inner diameter r4 of the first straight pipe portion 117A.
- the inner wall surface of the first straight pipe portion 117A by a predetermined depth in the thickness direction from one end U of the main shell 11A with a cutting brush or the like, the first inner wall surface 111A and the first protruding portion are cut.
- a step due to 112A is formed.
- the main frame 2, the fixed scroll 31 and the like are sequentially arranged.
- the cutting for forming two steps on the inner wall surface can be performed independently by the first straight pipe portion 117A, the second straight pipe portion 118A, and the connecting portion 119A.
- the cutting amount of 11A is only in the range indicated by the dotted line in FIG. 6C, and the time for cutting can be shortened.
- the thickness of the first straight pipe portion 117A portion of the first inner wall surface 111A and the thickness of the second straight pipe portion 118A portion of the second inner wall surface 114A can be made comparable, and the main shell is obtained by cutting. It can suppress that thickness of 11A becomes thin locally.
- the inner wall surface r3 of the cutting portion may be cut so as to be substantially the same as the inner wall surface r4 of the inner wall surface of the first straight pipe portion 117A. That is, the second inner wall surface 114A may be formed by making the inner wall surfaces of the first straight pipe portion 112A, the second straight pipe portion 118A, and the connecting portion 119A flush with each other. Since these steps are flush with each other, there is no level difference, so that the main frame 2 can be smoothly inserted from the one end U of the main shell 11A.
- the connecting part 119A and the second straight pipe part 115A may be slightly cut to be flush with each other.
- the main shell 11A includes a first straight pipe portion 117A, a second straight pipe portion 118A having an outer diameter R2 smaller than the outer diameter R1 of the first straight pipe portion 117A, and a first straight pipe portion 117A.
- a connecting portion 119A that connects the second straight pipe portion 118A, and at least a part of the second inner wall surface 114A is formed on the inner wall of the connecting portion 119A. Therefore, by cutting the inner wall surface of the connecting portion 119A, the entire second protruding portion 115A or a part of the second protruding portion 115A can be formed, and the amount to be cut is reduced compared with the case of the normal cylindrical main shell 11A. Can be facilitated.
- first inner wall surface 111A is formed on the inner wall of the first straight pipe portion 117A
- second inner wall surface 114A is formed on the inner walls of the second straight pipe portion 118A and the connecting portion 119A. Therefore, the first protruding portion 112A is cut by cutting a part of the inner wall surface of the first straight pipe portion 117A, and the second protruding portion 115A is cut by cutting the inner wall surfaces of the connecting portion 119A and the second straight pipe portion 118A. Can be formed. Therefore, the depth of cutting to form the first protruding portion 112A and the second protruding portion 115A can be made similar, and the thickness of the cut first straight pipe portion 117A can be suppressed from becoming too thin. .
- the second inner wall surface 114A has a sufficient length, and the fixing strength with the main frame 2 can be increased.
- the inner diameter r3 of the second inner wall surface 114A is smaller than the inner diameter r4 of the first straight pipe portion 112A, so that it has a stepped shape.
- the step is slight and the shape of the inner wall surface of the connecting portion 119A is tapered. Therefore, when the main frame 2 is inserted from the one end side U of the main shell 11A, the smooth insertion does not suppress the smooth insertion. Therefore, it is possible to easily perform the manufacturing while reducing the amount of shaving to form the second inner wall surface 114A.
- FIG. 10 is a cross-sectional view of a scroll compressor according to Embodiment 3 of the present invention
- FIG. 11 is an enlarged view of a region indicated by a two-dot chain line in FIG.
- the inner diameter of the upper shell 12B is set to be larger than the outer diameter on one end side of the main shell 11B, and the fixed scroll 31B is positioned on the one end side U of the main shell 11B. It is fixed to the inner wall surface of 12B. That is, a step is formed by the main shell 11B and the upper shell 12B, the inner wall surface of the upper shell 12B is the first inner wall surface 111B, the one end U of the main shell 11B is the first protrusion 112B, and the one end of the main shell 11B.
- the end surface on the side U also serves as the first positioning surface 113B.
- the fixed scroll 31B can be fixed by screwing to the upper shell 12B, spot welding with the upper shell 12B with a laser or the like, or screwing to the end surface of one end U of the main shell 11B.
- the upper shell 12B is provided so as to be at least partially inscribed in the main shell 11B.
- a protruding wall 314B protruding to the other end side L is formed at the outer end portion of the first substrate 311B of the fixed scroll 31B.
- the protruding wall 314B is a protruding piece for positioning the fixed scroll 31B in the radial direction with respect to the main shell 11B.
- the protruding wall 314B is disposed so that the outer wall surface is in contact with the inner wall surface of the main shell 11B, and is fixed by shrink fitting. Yes. Thereby, when the fixed scroll 31B is disposed on the first positioning surface 113B, the fixed scroll 31B can be prevented from being displaced in the radial direction with respect to the main shell 11B.
- the inner diameter of the upper shell 12B is larger than the outer diameter on one end side of the main shell 11B, and the first positioning surface 113B is formed at the end of the main shell 11B on the upper shell 12B side.
- FIG. FIG. 12 is a cross-sectional view of a scroll compressor according to Embodiment 4 of the present invention.
- the first protruding portion 112C is formed in a protruding shape protruding from the first inner wall surface 111C, and the fixed scroll 31C is positioned on the first protruding portion 112C. Therefore, the first protrusion 112C can be easily formed.
- the first projecting portion 112C can be formed by cutting the first inner wall surface 111C by bonding, or can be formed by adhering a previously formed protruding member to the inner wall surface.
- the first positioning surface 113C is tapered on the first protrusion 112C, and the inclined surface 315C is also formed on the first substrate 311C of the fixed scroll 31C so that the inclined surfaces are in contact with each other. Therefore, the positioning accuracy of the fixed scroll 31C with respect to the main shell 11C can be increased.
- the vertical scroll compressor has been described, but the present invention can also be applied to a horizontal scroll compressor.
- the side on which the compression mechanism portion is provided can be viewed as one end side and the side on which the drive mechanism portion is provided as the other end side with reference to the main frame.
- the present invention is not limited to the low-pressure shell type scroll compressor, and can be applied to a high-pressure shell type scroll compressor in which the pressure in the space in the main shell in which the drive mechanism unit is disposed is higher than the pressure in the refrigerant intake space.
- the load on the thrust bearing is small, it is desirable to adopt a structure in which the displacement amount is increased as shown in FIG. 13 described later or a structure in which the compressor is reduced in size as shown in FIG.
- the main shell 11 is not limited to a cylindrical shape, and may be a polygonal cylinder or the like. Moreover, in the said embodiment, a spiral body etc. by the effect which can expand the refrigerant
- the diameter of the second substrate 321D of the orbiting scroll 32D is the same as in the first embodiment, but the first spiral body 312D of the fixed scroll 31D is further connected to the end of the first substrate 311D.
- the second spiral body 322D of the orbiting scroll 32D may be formed to the vicinity of the end portion of the second substrate 321D.
- the centrifugal force due to the orbiting motion of the orbiting scroll 32D increases due to weight increase or the like. Therefore, it is necessary to cancel the centrifugal force by increasing the volume or weight of the weight portion 721D of the balance weight 72D.
- the design freedom of the main frame 2D is increased, so that a large accommodation space 211D of the main body 21D of the main frame 2D is secured. can do.
- the balance weight 72D having the weight portion 721D having a large volume can be used by enlarging the accommodation space 211D, the centrifugal force of the orbiting scroll 32D that has become larger due to weighting or the like is canceled out, and the orbiting scroll 32
- the radial load acting on the second spiral body 322 can be reduced. Therefore, the reliability of the orbiting scroll 32 can be improved, and the sliding loss between the second spiral body 322 of the orbiting scroll 32 and the first spiral body 312 of the fixed scroll 31 can be reduced.
- the size of the orbiting scroll 32 may be left as it is, and the shell 1E, that is, the main shell 11E, the upper shell 12E, and the like may have a smaller inner diameter than the conventional one. Thereby, compared with the past, the amount of displacement is equivalent and a small scroll compressor is realizable.
- the first protrusion 112 and the first positioning surface 113 can employ various shapes and manufacturing methods as long as the fixed scroll 31 can be accurately positioned.
- the first protrusion 112 only needs to be able to position the fixed scroll 31, and thus may be configured by at least two or more protrusions formed on the inner wall surface of the main shell 11. Further, the first protrusion 112 may be formed by hitting from the outside of the main shell 11. A convex portion may be formed on the first positioning surface 113 and fitted into a concave portion formed on the fixed scroll 31 to suppress the rotation of the fixed scroll 31 with respect to the main shell 11.
- the projections or recesses formed on the thrust plate 24F and the projection wall 216F project in the direction of the projection wall 216F on the thrust plate 24F to form a pair of projections 242F, and are cut out on the projection wall 216F.
- 218F may be formed, and a pair of protrusions 242F may be disposed in the notch 218F.
- the thrust plate 24 is not limited to an annular shape, and may have a C shape, and a suction port 213 having a large opening area may be disposed at a portion where the thrust plate 24 is cut. Thereby, the area of the suction port 213 can be expanded. At this time, if the area of the suction port 213 is increased, a part of the suction port 213 may be blocked by the swing scroll 32 depending on the timing of the swing of the swing scroll 32. In this case, if the suction port 213 is not blocked by the swing scroll 32 at the timing when the refrigerant is taken in by the fixed scroll 31 and the swing scroll 32, the influence of the suction port 213 being blocked can be reduced.
- the thrust plate 24 is not essential, and the flat surface 212 of the main frame 2 may slide with the orbiting scroll 32.
- a convex portion (or a concave portion) is formed on the inner wall surface of the main shell 11 in a direction along the central axis of the crankshaft 6, and a concave portion (or a convex portion) is engaged with the convex portion (or the concave portion) of the main frame 2 and the fixed scroll 31. May be formed.
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Abstract
Description
以下、実施の形態1について説明する。図1は、この実施の形態1に係るスクロール圧縮機の縦概略断面図である。図2は、この発明の実施の形態1に係るスクロール圧縮機のメインフレーム、揺動スクロール等の分解斜視図である。図3は、図1の一点鎖線の領域の拡大図である。なお、図1の圧縮機は、クランクシャフトの中心軸が地面に対して略垂直の状態で使用される、いわゆる縦型のスクロール圧縮機である。
また、第1位置決め面113は、メインフレーム2と摺動する揺動スクロール32の摺動面3211よりもアッパーシェル12の方向に形成され、第2位置決め面116は、摺動面3211よりもロアシェル13の方向に形成されている。したがって、メインフレーム2を一端側Uからメインシェル11に挿入固定後、メインシェル11をそのままの体勢で順次、揺動スクロール32や固定スクロール31を挿入固定することができるため、組立を容易化することができる。
また、スラストプレート24および突壁216には、凸部または凹部が形成されており、スラストプレートの回転を抑止可能に凸部と凹部とが係合している。凸部は、突壁216からスラストプレート24の方向に突出して形成された一対の突部217、凹部は、スラストプレートの外周部分に形成された切欠き241であり、一対の突部217は、切欠き241に設けられている。したがって、スラストプレート24がメインフレーム2の平坦面212に対して回転することを抑制することができる。また、フレームの一対の突部217の間には、アッパーシェル12の方向とロアシェル13の方向とに貫通して吸入ポート213が形成されている。したがって、吸入ポート213がスラストプレート24によって塞がれることを抑制でき、冷媒取込空間37に冷媒を安定して供給することができる。
図7は、本発明の実施の形態2に係るスクロール圧縮機の断面図、図8は、図7の二点鎖線の領域の拡大図である。以下の実施の形態等では、図1~図6のスクロール圧縮機と同一の構成を有する部位には同一の符号を付してその説明を省略する。
なお、第2内壁面114Aを作成する際に、切削部分の内壁面の内径r3を第1直管部117Aの内壁面の内径r4とほぼ同じになるように切削してもよい。すなわち、第1直管部112A、第2直管部118Aおよび連結部119Aの各々の内壁面を面一にすることで、第2内壁面114Aを形成しても良い。これらを面一にすることで、段差がなくなるため、メインシェル11Aの一端側Uからのメインフレーム2の挿入をスムーズに行うことができる。連結部119Aおよび第2直管部115Aの内壁面を第1直管部117Aの内壁面の内径r4とほぼ同じになるように切削することが製造誤差上困難な場合は、連結部119Aおよび第2直管部115Aの内壁面を切削する際に、第1直管部117Aの内壁面も僅かに削ることで面一にしても構わない。
図10は、本発明の実施の形態3に係るスクロール圧縮機の断面図、図11は、図10の二点鎖線の領域の拡大図である。
図12は、本発明の実施の形態4に係るスクロール圧縮機の断面図である。
Claims (20)
- 揺動スクロールを摺動自在に保持するフレームと、
前記揺動スクロールとともに圧縮室を形成する固定スクロールと、
前記フレームおよび固定スクロールを収容したシェルと、を備え、
前記シェルは、第1内壁面と、前記第1内壁面から突出し、前記固定スクロールを位置決めする第1突出部と、を有し、
前記固定スクロールは、前記第1内壁面に固定されているスクロール圧縮機。 - 前記揺動スクロールは、径方向の最外部に位置する側面を備え、前記側面と前記シェルの内壁面とが対向している請求項1に記載のスクロール圧縮機。
- 前記シェルは、第2内壁面と、前記第2内壁面から突出し、前記フレームを位置決めする第2突出部と、をさらに有し、
前記フレームは、前記第2内壁面に固定されている請求項1または請求項2に記載のスクロール圧縮機。 - 前記第2内壁面は、前記第1突出部の内壁面に形成されている請求項3に記載のスクロール圧縮機。
- 前記第1内壁面の内径は、前記第2内壁面の内径よりも大きく形成されている請求項3または請求項4に記載のスクロール圧縮機。
- 前記シェルは、両端が開口したメインシェルと、前記メインシェルの一端側の開口を覆う第1シェルと、前記メインシェルの他端側の開口を覆う第2シェルと、を備え、
前記第1突出部の前記第1シェルの側に、前記固定スクロールを位置決めする第1位置決め面が形成され、
前記第2突出部の前記第1シェルの側に、前記フレームを位置決めする第2位置決め面が形成されている請求項3に記載のスクロール圧縮機。 - 前記第1位置決め面は、前記フレームと摺動する前記揺動スクロールの摺動面よりも前記第1シェルの方向に形成され、
前記第2位置決め面は、前記摺動面よりも前記第2シェルの方向に形成されている請求項6に記載のスクロール圧縮機。 - 前記メインシェルは、第1直管部と、前記第1直管部の外径よりも外径が小さい第2直管部と、前記第1直管部と前記第2直管部とを連結する連結部と、を備え、
前記第2内壁面の少なくとも一部は、前記連結部の内壁に形成されている請求項6に記載のスクロール圧縮機。 - 前記第1内壁面は、前記第1直管部の内壁に形成され、
前記第2内壁面は、前記第2直管部の少なくとも一部および前記連結部の内壁に形成されている請求項8に記載のスクロール圧縮機。 - 前記第2内壁面の内径は、前記第1直管部の内径よりも小さく形成されている請求項8または請求項9に記載のスクロール圧縮機。
- 前記第1突出部における前記第1内壁面との接続部分、および前記第2突出部における前記第2内壁面との接続部分の少なくとも一方には、前記第2シェルの方向に凹みが形成されている請求項6~請求項10の何れかに記載のスクロール圧縮機。
- 前記第1シェルの外径は、前記メインシェルの前記一端側の内径よりも小さく形成され、
前記第1シェルは、前記固定スクロールを前記第1突出部とで挟んでいる請求項6~請求項11の何れかに記載のスクロール圧縮機。 - 前記第1シェルの内径は、前記メインシェルの前記一端側の外径よりも大きく形成され、
前記第1位置決め面は、前記メインシェルの前記第1シェルの側の端部に形成されている請求項6~請求項11の何れかに記載のスクロール圧縮機。 - 前記フレームは、前記揺動スクロールと対向する平坦面に、前記摺動面と摺動するスラストプレートを有し、
前記フレームの前記平坦面の外端部には、前記第1シェルの方向に突出する突壁が形成されており、
前記突壁の前記平坦面からの高さhは、前記スラストプレートの厚みdより小さい請求項7に記載のスクロール圧縮機。 - 前記スラストプレートおよび前記突壁には、凸部または凹部が形成されており、
前記スラストプレートの回転を抑止可能に前記凸部と前記凹部とが係合している請求項14に記載のスクロール圧縮機。 - 前記凸部は一対の突部、前記凹部は、切欠きであり、
前記一対の突部は、前記切欠きに設けられている請求項15に記載のスクロール圧縮機。 - 前記フレームには、前記一対の突部の間の部分に吸入ポートが貫通して形成されている請求項16に記載のスクロール圧縮機。
- 請求項1~請求項17の何れか一に記載のスクロール圧縮機、凝縮器、膨張弁、および蒸発器を備え、冷媒を循環させる冷凍サイクル装置であって、
前記冷媒は、R32を含む冷凍サイクル装置。 - 請求項1~請求項17の何れか一に記載のスクロール圧縮機、凝縮器、膨張弁、および蒸発器を備え、冷媒を循環させる冷凍サイクル装置であって、
前記冷媒は、HFO冷媒を含む冷凍サイクル装置。 - 揺動スクロールを摺動自在に保持するフレームと、
前記揺動スクロールとともに圧縮室を形成する固定スクロールと、
を収容するシェルであって、
前記固定スクロールを固定する第1内壁面と、
前記第1内壁面から突出し、前記固定スクロールを位置決めする第1突出部と、を備えたシェル。
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