WO2023162058A1 - Compresseur à spirale - Google Patents

Compresseur à spirale Download PDF

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Publication number
WO2023162058A1
WO2023162058A1 PCT/JP2022/007459 JP2022007459W WO2023162058A1 WO 2023162058 A1 WO2023162058 A1 WO 2023162058A1 JP 2022007459 W JP2022007459 W JP 2022007459W WO 2023162058 A1 WO2023162058 A1 WO 2023162058A1
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WO
WIPO (PCT)
Prior art keywords
suction
fixed
spiral portion
scroll
rocking
Prior art date
Application number
PCT/JP2022/007459
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English (en)
Japanese (ja)
Inventor
慎一郎 津田
一喜 小林
渉 岩竹
Original Assignee
三菱電機株式会社
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 三菱電機株式会社 filed Critical 三菱電機株式会社
Priority to PCT/JP2022/007459 priority Critical patent/WO2023162058A1/fr
Publication of WO2023162058A1 publication Critical patent/WO2023162058A1/fr

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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

Definitions

  • the present disclosure relates to scroll compressors used in air conditioners, refrigerators, and the like.
  • the compression mechanism of scroll compressors used in air conditioners and refrigerators is composed of a fixed scroll spiral portion and an orbiting scroll spiral portion.
  • a space is formed between the fixed scroll and the orbiting scroll by fixing the fixed scroll and arranging the orbiting scroll so that the spiral portion of the orbiting scroll meshes with the spiral portion of the fixed scroll. Refrigerant can be sucked and compressed at .
  • the compression function is improved by increasing the suction volume of the compression mechanism as much as possible while maintaining the diameter of the sealed container that houses the compression mechanism. It is important to let
  • Patent Literature 1 discloses an example in which an auxiliary suction hole for communicating a suction pipe and a refrigerant suction space is formed in a sealed container separately from the suction hole.
  • the suction hole and the auxiliary suction hole formed in the closed container are used together to promote the flow from the suction hole to the refrigerant suction space.
  • the suction pressure loss increases, and the refrigerant suction efficiency decreases.
  • the present disclosure has been made to solve the problems described above, and an object of the present disclosure is to provide a scroll compressor capable of suppressing a decrease in refrigerant suction efficiency even when the spiral portion is expanded in the radial direction.
  • a scroll compressor includes a closed container that forms an outer shell, a suction pipe that allows refrigerant to flow into a first suction space inside the closed container, a fixed base plate and a fixed base plate that are provided in the closed container.
  • a fixed scroll having a fixed spiral portion which is a spiral projection provided on one surface of the base plate, an oscillating bed plate, and an oscillating spiral portion which is a spiral projection provided on one surface of the oscillating bed plate.
  • a compression chamber for compressing refrigerant by meshing the fixed spiral portion and the oscillating spiral portion; and a suction for guiding the refrigerant flowing into the first suction space to the compression chamber.
  • a suction passage is formed to intermittently communicate the suction hole and the suction chamber when the is rocking.
  • the frame is formed with the suction hole that communicates the second suction space and the first suction space, and the swing bed plate swings the swing scroll.
  • a suction passage is formed to intermittently communicate the suction hole and the suction chamber when the suction chamber is closed. Therefore, even if the spiral portion is expanded in the radial direction and the swing bed plate closes the suction hole, the suction channel can intermittently communicate the suction hole and the suction chamber. As a result, the refrigerant can be taken into the suction chamber while suppressing the suction pressure loss, and the deterioration of the refrigerant suction efficiency can be suppressed.
  • FIG. 1 is a cross-sectional view showing the configuration of a scroll compressor according to Embodiment 1;
  • FIG. 4 is a diagram showing a compression stroke for explaining the operation of the compression mechanism of the scroll compressor according to Embodiment 1;
  • FIG. FIG. 4 is a plan view for explaining the positional relationship between the suction hole, the suction flow path, the fixed spiral portion, and the swinging spiral portion of the compression mechanism of the scroll compressor according to Embodiment 1;
  • FIG. 4 is a cross-sectional view for explaining the positional relationship between the suction hole, the suction flow path, the fixed spiral portion, and the swinging spiral portion of the scroll compressor according to Embodiment 1;
  • FIG. 2 is a diagram illustrating a suction chamber of the scroll compressor according to Embodiment 1;
  • FIG. 1 is a cross-sectional view showing the configuration of a scroll compressor according to Embodiment 1;
  • FIG. 4 is a diagram showing a compression stroke for explaining the operation of the compression mechanism of the scroll
  • FIG. 5 is a diagram for explaining the positional relationship between the suction hole, the suction flow path, the fixed spiral portion, and the swinging spiral portion in the compression stroke for explaining the operation of the compression mechanism of the scroll compressor according to Embodiment 1;
  • FIG. 7 is a plan view for explaining the positional relationship between the suction hole, the suction flow path, the fixed spiral portion, and the swinging spiral portion of the compression mechanism according to the first modification of the scroll compressor according to Embodiment 1;
  • FIG. 8 is a plan view illustrating the positional relationship between the suction hole, the suction flow path, the fixed spiral portion, and the swinging spiral portion of the compression mechanism according to the second modification of the scroll compressor according to Embodiment 1;
  • FIG. 8 is a plan view for explaining the positional relationship among the suction hole, the suction flow path, the fixed spiral portion, and the oscillating spiral portion of the compression mechanism of the scroll compressor according to Embodiment 2;
  • FIG. 7 is a cross-sectional view for explaining the positional relationship between the suction hole, the suction flow path, the fixed spiral portion, and the swinging spiral portion of the scroll compressor according to Embodiment 2;
  • FIG. 1 is a cross-sectional view showing the configuration of a scroll compressor 1 according to Embodiment 1.
  • the scroll compressor 1 has a function of sucking refrigerant, compressing it, and discharging it in a high-temperature, high-pressure state.
  • the scroll compressor 1 includes a closed container 90 forming an outer shell.
  • the sealed container 90 is composed of a sealed container upper portion 91 and a sealed container lower portion 92 .
  • a suction pipe 1f is provided on the side of the lower portion 92 of the hermetic container for allowing the low-pressure gas refrigerant from the main refrigerant circuit outside the hermetic container 90 to flow into the interior of the hermetic container 90 .
  • a discharge pipe 1g is provided in the upper portion of the closed container upper portion 91 for discharging the high-temperature and high-pressure discharged refrigerant from the inside of the closed container 90 to the main refrigerant circuit outside.
  • a compression mechanism 1a for compressing the refrigerant, a rotary shaft 1b for driving the compression mechanism 1a, and an electric stator 1c and an electric rotor 1d for rotating the rotary shaft 1b are housed inside the sealed container 90. Further, inside the sealed container 90, a pump element 1e is housed that supplies the refrigerating machine oil stored in the oil reservoir 80 formed at the bottom of the sealed container 90 to the compression mechanism 1a.
  • the compression mechanism 1a has a fixed scroll 11 and an orbiting scroll 12.
  • the orbiting scroll 12 is rotationally driven together with the rotating shaft 1b.
  • the fixed scroll 11 includes a fixed base plate 11a and a fixed spiral portion 11b, which is a spiral protrusion provided on the lower surface of the fixed base plate 11a.
  • the fixed scroll 11 is arranged above the orbiting scroll 12, and the outer peripheral portion of the fixed base plate 11a is fixed to the inner peripheral wall of the lower portion 92 of the sealed container.
  • the oscillating scroll 12 includes an oscillating bed plate 12a and an oscillating spiral portion 12b, which is a spiral projection provided on the upper surface of the oscillating bed plate 12a.
  • the compression mechanism 1a has an asymmetric spiral shape in which the fixed spiral portion 11b and the oscillating spiral portion 12b have different winding end phases.
  • a hollow cylindrical boss 12d is provided at the center of the lower surface of the rocking plate 12a.
  • a suction flow path 32 is formed on the outer peripheral side of the rocking plate 12a. This suction flow path 32 will be described later.
  • the rotary shaft 1b has a main shaft portion 1bb, an eccentric shaft portion 1ba positioned above the main shaft portion 1bb, and a sub-shaft portion 1bc positioned below the main shaft portion 1bb.
  • the rotating shaft 1b is fitted to the orbiting scroll 12 so that the orbiting scroll 12 can perform an oscillating motion via the orbiting bearing 12c of the orbiting scroll 12.
  • the orbiting spiral portion 12b of the orbiting scroll 12 and the fixed spiral portion 11b of the fixed scroll 11 are combined so as to have opposite phases.
  • a suction chamber 73a, a compression chamber 73b, and an innermost chamber 73c are formed by engaging the swinging spiral portion 12b and the fixed spiral portion 11b (see FIG. 2, which will be described later).
  • the suction chamber 73a is an unsealed space for sucking the refrigerant in the second suction space 72 surrounded by the inner peripheral wall of the lower portion 92 of the sealed container and the outer peripheral portion of the spiral portion.
  • the compression chamber 73b is a closed space that compresses the refrigerant sucked by the suction chamber 73a.
  • the innermost chamber 73c is the innermost compression space and is a closed space in which the refrigerant compressed in the compression chamber 73b is discharged to the discharge space 74 through the discharge port 22 formed in the fixed base plate 11a.
  • a discharge valve 23 is provided on the outlet side of the discharge port 22 so as to open and close the outlet of the discharge port 22. When the pressure in the innermost chamber 73c reaches a predetermined value or higher, the discharge valve 23 closes the discharge port 22. , the refrigerant in the innermost chamber 73 c is discharged into the discharge space 74 .
  • the frame 17 is for fixing the fixed scroll 11, and its outer peripheral portion is fixed to the inner peripheral wall of the lower part 92 of the sealed container.
  • the frame 17 also has a thrust surface (not shown) that axially supports the thrust force acting on the orbiting scroll 12 .
  • the frame 17 has a suction hole 31 that communicates a first suction space 71 and a second suction space 72 into which refrigerant flows from the suction pipe 1f.
  • An Oldham ring 13 that functions as an anti-rotation mechanism for the orbiting scroll 12 is provided between the orbiting scroll 12 and the frame 17 .
  • the electric stator 1c supplies driving force to the rotating shaft 1b via the electric rotor 1d.
  • the electric stator 1c is fixed to the inner peripheral wall of the lower portion 92 of the sealed container by shrink fitting or the like.
  • the electric stator 1c is externally powered by lead wires (not shown) connected to glass terminals (not shown) between the frame 17 and the electric stator 1c.
  • the electric rotor 1d is fixed to the rotating shaft 1b by shrink fitting or the like.
  • a first balance weight 60 is fixed to the rotating shaft 1b, and a second balance weight 61 is fixed to the electric rotor 1d.
  • the first balance weight 60 and the second balance weight 61 control the moment balance of the entire rotation system in the scroll compressor 1 .
  • the eccentric shaft portion 1ba of the rotary shaft 1b is fitted in a rocking bearing 12c provided on the lower surface of the rocking plate 12a, and slides on each other via an oil film of refrigerating machine oil.
  • the rocking bearing 12c is formed by press-fitting a bearing material used for sliding bearings, such as a copper-lead alloy, to the inner periphery of a hollow cylindrical boss portion 12d.
  • a slider 15 for supporting the orbiting scroll 12 is provided on the outer peripheral side of the eccentric shaft portion 1ba to cause the orbiting scroll 12 to revolve.
  • a main shaft portion 1bb of the rotating shaft 1b is rotatably fitted to a main bearing 17a provided at the center of the frame 17, and slides on each other via an oil film of refrigerating machine oil.
  • the main bearing 17a is formed by press-fitting a bearing material used for sliding bearings, such as a copper-lead alloy, to the inner circumference of a hollow cylindrical boss portion 17b.
  • a sleeve 21 is provided on the outer peripheral side of the main shaft portion 1bb for smoothly rotating the main shaft portion 1bb.
  • a sub-frame 19 fixed with bolts (not shown) to a sub-frame holder 19a fixed to the inner peripheral wall of the lower part 92 of the sealed container is provided below the electric stator 1c and the electric rotor 1d.
  • a sub-bearing 20 made of a ball bearing is provided on the upper portion of the sub-frame 19, and the sub-bearing 20 radially supports the rotating shaft 1b.
  • the secondary bearing 20 may have a bearing structure other than a ball bearing.
  • the sub-shaft portion 1bc of the rotating shaft 1b is fitted with the sub-bearing 20 and slides on the sub-bearing 20 via an oil film of refrigerating machine oil. Note that the main shaft portion 1bb and the sub shaft portion 1bc are aligned with each other.
  • FIG. 2 is a diagram showing a compression stroke for explaining the operation of the compression mechanism 1a of the scroll compressor 1 according to Embodiment 1.
  • FIG. 11 is a compression stroke diagram showing the state of the fixed spiral portion 11b and the swinging spiral portion 12b at [deg].
  • FIG. 1 the flow of the refrigerant in the scroll compressor 1 will be described using FIGS. 1 and 2.
  • the fixed spiral portion 11b of the fixed scroll 11 and the oscillating spiral portion 12b of the oscillating scroll 12 perform relative oscillating motions.
  • the refrigerant that has flowed into the second suction space 72 is drawn into a suction chamber 73a (the hatched area in FIG. 2) formed by the fixed spiral portion 11b and the swinging spiral portion 12b along with this swinging motion.
  • Refrigerant sucked into the suction chamber 73a transitions to the compression chamber 73b at a certain rotation angle, and changes in geometric volume of the compression chamber 73b due to changes in the positional relationship between the fixed spiral portion 11b and the swinging spiral portion 12b. , is boosted from low pressure to high pressure. After that, the refrigerant in the compression chamber 73b transitions to the innermost chamber 73c at a certain rotation angle and is discharged into the discharge space 74 through the discharge port 22 communicating with the innermost chamber 73c. After that, the refrigerant discharged into the discharge space 74 flows out from the discharge pipe 1g shown in FIG.
  • FIG. 3 is a plan view illustrating the positional relationship between the suction hole 31, the suction passage 32, the fixed spiral portion 11b, and the swinging spiral portion 12b of the compression mechanism 1a of the scroll compressor 1 according to Embodiment 1.
  • FIG. 4 is a cross-sectional view illustrating the positional relationship among the suction hole 31, the suction passage 32, the fixed spiral portion 11b, and the swinging spiral portion 12b of the scroll compressor 1 according to Embodiment 1.
  • FIG. FIG. 5 is a diagram illustrating the suction chamber 73a of the scroll compressor 1 according to Embodiment 1.
  • FIG. Note that the arrows in FIG. 4 indicate the flow of the coolant.
  • the scroll compressor 1 has a suction flow that intermittently communicates the suction hole 31 and the suction chamber 73a while the orbiting scroll 12 is swinging. It is characterized in that the path 32 is formed in the rocking base plate 12a.
  • the suction flow path 32 is an elliptical through hole in plan view, and is formed in the rocking base plate 12a so as to straddle the teeth of the fixed spiral portion 11b.
  • FIG. 5 The hatched area in FIG. 5 indicates the suction chamber 73a.
  • the suction chamber 73a is an inward surface suction chamber 73a1 formed by the inward surface of the fixed spiral portion 11b of the fixed scroll 11 and the outward surface of the orbiting spiral portion 12b of the orbiting scroll 12, and the fixed spiral portion 11b of the fixed scroll 11. and an outward surface suction chamber 73a2 formed by the inward surface of the orbiting spiral portion 12b of the orbiting scroll 12.
  • the inward suction chamber 73a1 consists of the inward suction chamber suction port 102a, the inward surface of the fixed spiral portion 11b, the outward surface of the swinging spiral portion 12b, the swing base plate 12a, and the fixed base plate 11a (see FIG. 1). It is an enclosed space.
  • the outward surface suction chamber 73a2 includes the outward surface suction chamber suction port 102b, the outward surface of the fixed spiral portion 11b, the inward surface of the swing spiral portion 12b, the swing base plate 12a, and the fixed base plate 11a (see FIG. 1). ) is a space surrounded by
  • the inward surface suction chamber suction port 102a is an opening of the inward surface suction chamber 73a1 with respect to the second suction space 72, which is a straight line connecting the fixed spiral base circle center 100a and the fixed spiral inward surface end point 101a.
  • the outward surface suction chamber suction port 102b is an opening of the outward surface suction chamber 73a2 to the second suction space 72, which is a straight line connecting the swing spiral base circle center 100b and the swing spiral inward surface end point 101b. be.
  • FIG. 6 shows the positional relationship of the suction hole 31, the suction flow path 32, the fixed spiral portion 11b, and the swinging spiral portion 12b in the compression stroke for explaining the operation of the compression mechanism 1a of the scroll compressor 1 according to Embodiment 1. It is a figure explaining.
  • FIG. 6(a) shows the inward surface suction chamber 73a1 at the start of refrigerant suction, and the inward surface suction chamber 73a1 has no volume. Since the suction port of the chamber 73a1 is closed, no refrigerant is drawn at this time. On the other hand, by expanding the spiral portion in the radial direction, the rocking plate 12 a covers the suction hole 31 . However, since the suction channel 32 formed in the rocking base plate 12 a communicates with the suction hole 31 , the refrigerant flows from the suction hole 31 into the second suction space 72 through the suction channel 32 .
  • the orbiting scroll 12 is in a ⁇ /2 orbiting motion from the time point when the inward suction chamber 73a1 starts to suck the refrigerant.
  • the volume of the inward suction chamber 73a1 is formed, and the flow path area of the suction port of the inward suction chamber 73a1 begins to increase, so the inward suction chamber 73a1 starts sucking the refrigerant.
  • the rocking plate 12a still blocks most of the suction holes 31, but the refrigerant flows from the suction holes 31 into the second suction space 72 through the suction passages 32 as described above.
  • the suction flow path 32 opens directly into the inward surface suction chamber 73a1.
  • the refrigerant is taken into the inward surface suction chamber 73 a 1 from the suction hole 31 without passing through the second suction space 72 .
  • a space is created between the inner peripheral wall of the closed container lower portion 92 and the oscillating base plate 12a, and the second suction space 72 expands.
  • the refrigerant also flows through the suction space 72 to the inward suction chamber 73a1.
  • the orbiting scroll 12 is in a ⁇ -oscillating motion from the time point when the inward suction chamber 73a1 starts to suck the refrigerant.
  • the passage area of the suction port of the inward suction chamber 73a1 becomes maximum.
  • the suction hole 31 is arranged near the winding end of the fixed spiral portion 11b, the space between the inner peripheral wall of the lower part 92 of the sealed container and the rocking plate 12a becomes the largest. The amount of refrigerant taken into the inward suction chamber 73a1 via the second suction space 72 increases.
  • the suction channel 32 formed in the rocking base plate 12a hardly communicates with the second suction space 72, so that the suction hole 31 passes through the suction channel 32 to the second suction space. Refrigerant does not flow into 72 .
  • the suction flow path 32 communicates with the suction hole 31 and the inward suction chamber 73a1, there is a path through which the refrigerant is taken in from the suction hole 31 to the inward suction chamber 73a1 through the suction flow path 32.
  • the orbiting scroll 12 is in an orbiting motion of 3 ⁇ /2 from the time point when the inward suction chamber 73a1 starts to suck the refrigerant.
  • the suction hole 31 begins to be blocked by the orbiting base plate 12a.
  • a path from the suction hole 31 to the inward suction chamber 73a1 via the suction passage 32 exists because the suction passage 32 opens to the suction hole 31 and the inward suction chamber 73a1.
  • a suction passage 32 is formed in the swing base plate 12a to intermittently communicate the suction hole 31 and the suction chamber 73a while the swing scroll 12 is swinging. By doing so, the refrigerant can be sucked into the suction chamber 73a from the suction hole 31 through the suction flow path 32 even at the timing when the suction hole 31 is blocked by the rocking plate 12a.
  • FIG. 7 illustrates the positional relationship between the suction hole 31, the suction flow path 32, the fixed spiral portion 11b, and the swinging spiral portion 12b of the compression mechanism 1a according to the first modification of the scroll compressor 1 according to the first embodiment. It is a top view.
  • FIG. 8 illustrates the positional relationship between the suction hole 31, the suction flow path 32, the fixed spiral portion 11b, and the swinging spiral portion 12b of the compression mechanism 1a according to the second modification of the scroll compressor 1 according to the first embodiment. It is a top view.
  • the outward surface suction chamber 73a2 is formed by the outward surface of the fixed spiral portion 11b of the fixed scroll 11 and the inward surface of the orbiting spiral portion 12b of the orbiting scroll 12. also mention.
  • the suction passage 32 formed in the rocking base plate 12a is a through hole of a size that does not straddle the teeth of the fixed spiral portion 11b. It is possible to obtain the same effect as the effect of That is, even at the timing when the suction hole 31 is blocked by the rocking plate 12a, the refrigerant can be sucked into the suction chamber 73a from the suction hole 31 through the suction flow path 32.
  • the suction passage 32 needs to be a through hole of a size that does not straddle the teeth of the fixed spiral portion 11b.
  • the area of the intake channel 32 is reduced. Therefore, in order to compensate for this, it is conceivable to remove a portion of the rocking plate 12a that does not form a sliding portion with the fixed spiral portion 11b, and use the removed portion as the second suction space 72.
  • the reason why the through hole needs to be of a size that does not straddle the teeth of the fixed spiral portion 11b is that if the through hole has a size that straddles the teeth of the fixed spiral portion 11b, the outward surface suction chamber 73a2 and the compression chamber 73b This is because there is a possibility that a phase that becomes a positional relationship in which the two are in communication with each other and compression cannot be performed in the first place due to a decrease in volumetric efficiency or leakage.
  • the outward surface suction chamber 73a2 and the compression chamber 73b as shown in FIG. 7, if the through hole is large, the outward surface suction chamber 73a2 and the compression chamber 73b are closed at a timing close to the start of compression of the outward surface suction chamber 73a2. communication occurs.
  • the suction flow path 32 formed in the rocking base plate 12a has an elliptical opening shape and a single through hole. can be obtained, the shape of the opening of the suction flow path 32 and the number of through-holes are not limited.
  • the suction flow path 32 may be formed by notching part of the outer peripheral portion of the rocking plate 12a, that is, by notching.
  • the scroll compressor 1 according to Embodiment 1 has a so-called frame-outer-wall-less structure in which the outer wall portion of the frame 17 that was present for fastening the fixed scroll 11 and the frame 17 is removed.
  • the compressor may have a structure in which the fixed scroll 11 is fixed by the outer wall of the frame 17 as long as the suction hole 31 opens toward the bottom surface of the rocking plate 12a.
  • the number of suction holes 31 is one as shown in FIG.
  • the compression mechanism 1a has an asymmetric spiral shape in which the fixed spiral portion 11b and the oscillating spiral portion 12b end in different winding phases, but the compression mechanism 1a is not limited to this.
  • the compression mechanism 1a may have a symmetrical spiral shape in which the winding ends of the fixed spiral portion 11b and the swinging spiral portion 12b are in the same phase.
  • the bottom surface of the rocking plate 12a and the top surface of the frame 17 are configured to slide, but the configuration is not limited to this.
  • a thrust plate (not shown) having an opening facing the suction hole 31 is inserted between the rocking base plate 12a and the frame 17, and after applying an anti-rotation mechanism, rocking is performed via the thrust plate.
  • the bottom surface of the base plate 12a and the top surface of the frame 17 may slide.
  • the scroll compressor 1 includes the sealed container 90 forming the outer shell, the suction pipe 1f for flowing the refrigerant into the first suction space 71 inside the sealed container 90, and the a fixed scroll 11 having a fixed base plate 11a and a fixed spiral portion 11b which is a spiral projection provided on one surface of the fixed base plate 11a; a compression chamber 73b that compresses the refrigerant by meshing the fixed spiral portion 11b and the swinging spiral portion 12b; , a suction chamber 73a that guides the refrigerant flowing into the first suction space 71 to the compression chamber 73b; and a frame 17 that is fixed to the inner peripheral wall of the sealed container 90 and has the fixed scroll 11 fixedly arranged therein.
  • 31 is formed in the rocking bed plate 12a, and a suction passage 32 is formed in the rocking bed plate 12a to intermittently communicate the suction hole 31 and the suction chamber 73a when the rocking scroll 12 is rocking. It is.
  • the frame 17 is formed with the suction hole 31 that allows the second suction space 72 and the first suction space 71 to communicate with each other.
  • a suction passage 32 is formed to intermittently communicate the suction hole 31 and the suction chamber 73a while the orbiting scroll 12 is swinging. Therefore, even if the spiral portion is expanded in the radial direction and the rocking plate 12a closes the suction hole 31, the suction passage 32 intermittently communicates the suction hole 31 and the suction chamber 73a. be able to. As a result, the refrigerant can be taken into the suction chamber 73a while suppressing the suction pressure loss, and the deterioration of the refrigerant suction efficiency can be suppressed.
  • the suction passage 32 is a through hole or a notch formed in the rocking bed plate 12a.
  • Embodiment 2 will be described below, but descriptions of parts that overlap with those of Embodiment 1 will be omitted, and parts that are the same as or correspond to those of Embodiment 1 will be given the same reference numerals.
  • FIG. 9 is a plan view for explaining the positional relationship between the suction hole 31, the suction passage 32, the fixed spiral portion 11b, and the swinging spiral portion 12b of the compression mechanism 1a of the scroll compressor 1 according to Embodiment 2.
  • FIG. 10 is a cross-sectional view for explaining the positional relationship among the suction hole 31, the suction passage 32, the fixed spiral portion 11b, and the swinging spiral portion 12b of the scroll compressor 1 according to Embodiment 2.
  • the suction flow path 32 for intermittently communicating the suction hole 31 and the suction chamber 73a while the orbiting scroll 12 is swinging is provided by the swing bed plate 12a.
  • the back surface of the rocking plate 12a that is, the lower surface in the vertical direction, that is, the surface opposite to the surface facing the fixed scroll 11 has an entire outer peripheral portion. It is characterized by forming an auxiliary suction flow path 33 recessed inward along the circumferential direction.
  • the back surface of the rocking base plate 12a is the back surface of FIG.
  • the suction flow path 32 does not communicate with the suction hole 31 in the axial direction, it can always communicate with the suction hole 31 via the auxiliary suction flow path 33 .
  • the auxiliary suction passages 33 can always be used.
  • the suction hole 31 and the suction channel 32 communicate with each other. Therefore, by combining the suction flow path 32 and the auxiliary suction flow path 33, it is possible to expand the spiral portion in the radial direction while suppressing the suction pressure loss regardless of the circumferential arrangement of the suction holes 31.
  • the auxiliary suction flow path 33 is formed along the entire circumference of the back surface of the rocking plate 12a, but the present invention is not limited to this. As long as the expected effect can be obtained, the auxiliary suction flow path 33 recessed inward along the circumferential direction may be formed only on a part of the outer periphery of the back surface of the rocking plate 12a instead of on the entire periphery. . Further, the shape of the auxiliary suction flow path 33 is not limited to the above, and other shapes may be used as long as the expected effect can be obtained.
  • the auxiliary suction passage 33 communicates with the suction hole 31 and the suction channel 32 .
  • the suction flow path 32 is axially axially moved through the auxiliary suction flow path 33 formed in at least a part of the outer peripheral portion of the back surface of the rocking plate 12a. , it is possible to always communicate with the suction hole 31 even if it is not in communication with the suction hole 31 . Therefore, by combining the suction flow path 32 and the auxiliary suction flow path 33, it is possible to expand the spiral portion in the radial direction while suppressing the suction pressure loss regardless of the circumferential arrangement of the suction holes 31.

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

Abstract

L'invention concerne un compresseur à spirale comprenant : un mécanisme de compression qui a un récipient fermé formant une coque externe, un tuyau d'aspiration qui permet à un fluide frigorigène de s'écouler dans un premier espace d'aspiration à l'intérieur du récipient fermé, une spirale fixe qui est disposée dans le récipient fermé et a une plaque de base fixe et une partie en spirale fixe qui est une saillie en spirale disposée sur une surface de la plaque de base fixe, et une spirale oscillante qui a une plaque de base oscillante et une partie en spirale oscillante qui est une saillie en spirale disposée sur une surface de la plaque de base oscillante, le mécanisme de compression étant formé avec une chambre de compression où le fluide frigorigène est comprimé et une chambre d'aspiration qui introduit le fluide frigorigène s'écoulant dans le premier espace d'aspiration dans la chambre de compression par l'engrènement de la partie en spirale fixe et de la partie en spirale oscillante ; et un cadre qui est fixé à la paroi périphérique interne du récipient fermé et agence de manière fixe la spirale fixe, le cadre étant formé avec un trou d'aspiration qui fait communiquer un second espace d'aspiration entouré par la paroi périphérique interne du récipient fermé et les parties périphériques externes de la partie en spirale fixe et de la partie en spirale oscillante avec le premier espace d'aspiration et la plaque de base oscillante est formée avec un passage d'aspiration qui met en communication par intermittence le trou d'aspiration et la chambre d'aspiration lorsque la spirale oscillante oscille.
PCT/JP2022/007459 2022-02-24 2022-02-24 Compresseur à spirale WO2023162058A1 (fr)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60166782A (ja) * 1985-01-25 1985-08-30 Hitachi Ltd スクロール流体機械
JPH0476288A (ja) * 1990-07-19 1992-03-11 Sanyo Electric Co Ltd スクロール圧縮機

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60166782A (ja) * 1985-01-25 1985-08-30 Hitachi Ltd スクロール流体機械
JPH0476288A (ja) * 1990-07-19 1992-03-11 Sanyo Electric Co Ltd スクロール圧縮機

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