CN111989493A - Scroll compressor having a plurality of scroll members - Google Patents
Scroll compressor having a plurality of scroll members Download PDFInfo
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- CN111989493A CN111989493A CN201880092084.2A CN201880092084A CN111989493A CN 111989493 A CN111989493 A CN 111989493A CN 201880092084 A CN201880092084 A CN 201880092084A CN 111989493 A CN111989493 A CN 111989493A
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- scroll
- circumferential groove
- scroll compressor
- housing
- refrigerant
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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
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- F04C29/04—Heating; Cooling; Heat insulation
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
- Rotary Pumps (AREA)
Abstract
The scroll compressor is connected with an injection pipe and is provided with: a fixed scroll having a 1 st base plate and a 1 st scroll; an oscillating scroll having a 2 nd base plate and a 2 nd scroll and forming a compression chamber together with the fixed scroll; and a housing that houses the fixed scroll and the oscillating scroll, the fixed scroll including: a circumferential groove provided on the outer circumferential surface of the 1 st base plate and forming a flow path for the refrigerant flowing from the injection pipe to flow between the circumferential groove and the inner wall surface of the housing; and an internal flow path which connects the circumferential groove and the compression chamber or a refrigerant suction chamber formed on the outer side of the compression chamber in the radial direction.
Description
Technical Field
The present invention relates to an injection structure of a scroll compressor.
Background
Conventionally, a scroll compressor having an injection structure is known (for example, see patent document 1).
In the scroll compressor of patent document 1, a 2 nd space is formed on the outer peripheral side of the 1 st scroll and the 2 nd scroll and on the inner peripheral side of the inner wall surface of the frame. Then, the injection of the injection refrigerant is performed from the inner wall surface of the frame to the 2 nd space.
Patent document 1: international publication No. 2016/79858
However, in the scroll compressor of patent document 1, since the injection refrigerant is injected from the inner wall surface of the frame, there is a problem that it is difficult to supply the injection refrigerant to a target position with high accuracy.
Disclosure of Invention
The present invention has been made to solve the above-described problems, and an object thereof is to provide a scroll compressor capable of supplying an injection refrigerant to a target position with high accuracy.
The scroll compressor according to the present invention is a scroll compressor to which an injection pipe is connected, and includes: a fixed scroll having a 1 st base plate and a 1 st scroll; an oscillating scroll having a 2 nd base plate and a 2 nd scroll and forming a compression chamber together with the fixed scroll; and a housing that houses the fixed scroll and the oscillating scroll, the fixed scroll including: a circumferential groove provided on the outer circumferential surface of the 1 st base plate and forming a flow path for the refrigerant flowing from the injection pipe to flow between the circumferential groove and the inner wall surface of the housing; and an internal flow path that connects the circumferential groove to the compression chamber or a refrigerant suction chamber formed radially outward of the compression chamber.
According to the scroll compressor of the present invention, since the injection refrigerant is supplied from the internal flow path provided in the fixed scroll, the injection refrigerant can be supplied to the target portion with high accuracy.
Drawings
Fig. 1 is a longitudinal schematic sectional view of a scroll compressor according to embodiment 1 of the present invention.
Fig. 2 is an exploded perspective view of a main frame, an orbiting scroll, and the like of a scroll compressor according to embodiment 1 of the present invention.
Fig. 3 is an enlarged view of a one-dot chain line region of the scroll compressor shown in fig. 1.
Fig. 4 is an enlarged view of an area of a two-dot chain line of the scroll compressor shown in fig. 3.
Fig. 5 is a partial sectional view of a fixed scroll of a scroll compressor according to embodiment 1 of the present invention.
Fig. 6 is an enlarged top view in longitudinal schematic cross section of a scroll compressor according to embodiment 2 of the present invention.
Fig. 7 is an enlarged top view in longitudinal schematic cross section of a scroll compressor according to embodiment 3 of the present invention.
Fig. 8 is an enlarged top view in longitudinal schematic cross section of a modification of the scroll compressor according to embodiment 3 of the present invention.
Detailed Description
Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In the drawings, the same or corresponding portions are denoted by the same reference numerals, and the description thereof will be omitted or simplified as appropriate. In addition, the shape, size, arrangement, and the like of the structures shown in the drawings can be appropriately changed within the scope of the present invention.
Embodiment 1.
Fig. 1 is a longitudinal schematic sectional view of a scroll compressor according to embodiment 1 of the present invention. Fig. 2 is an exploded perspective view of the main frame 2, the orbiting scroll 32, and the like of the scroll compressor according to embodiment 1 of the present invention. Fig. 3 is an enlarged view of a one-dot chain line region of the scroll compressor shown in fig. 1. The compressor of fig. 1 is a so-called vertical scroll compressor used in a state where the central axis of the crankshaft 6 is substantially perpendicular to the ground.
As shown in fig. 1, the scroll compressor includes a casing 1, a main frame 2, a compression mechanism 3, a drive mechanism 4, a sub-frame 5, a crankshaft 6, a bush 7, and a power supply unit 8. Hereinafter, the side (upper side) where the compression mechanism portion 3 is provided is defined as one end side U and the side (lower side) where the drive mechanism portion 4 is provided is defined as the other end side L with respect to the main frame 2.
The housing 1 is a closed container constituting an outer shell, and has a cylindrical shape with both ends closed by a conductive member such as a metal. The housing 1 includes a main housing 11, an upper housing 12, and a lower housing 13. The main casing 11 has a cylindrical shape, and a suction pipe 14 is connected to a side wall thereof by welding or the like. As shown in fig. 2, the main casing 11 includes: 1 st inner wall surface 111; a 1 st projection 112 projecting from the 1 st inner wall surface 111 and positioning the fixed scroll 31; and a 1 st positioning surface 113 facing the upper case 12 side in the 1 st projection 112. The suction pipe 14 is a pipe for introducing the refrigerant into the casing 1, and communicates with the inside of the main casing 11 as shown in fig. 1.
The upper case 12 is a 1 st case having a substantially hemispherical shape, and a part of a side wall thereof is connected to an upper end portion of the main case 11 by welding or the like, covering an upper opening of the main case 11. A discharge pipe 15 is connected to the upper portion of the upper case 12 by welding or the like. Discharge pipe 15 is a pipe for discharging the refrigerant to the outside of casing 1, and communicates with the internal space of main casing 11.
The lower case 13 is a 2 nd case having a substantially hemispherical shape, and a part of a side wall thereof is connected to a lower end portion of the main case 11 by welding or the like, covering an opening on a lower side of the main case 11. The housing 1 is supported by a fixing base 17 having a plurality of screw holes (not shown). The fixing base 17 is formed with a plurality of screw holes, and screws are screwed into these screw holes, whereby the scroll compressor can be fixed to other members such as a casing of the outdoor unit.
The main frame 2 is a hollow metal frame having a cavity formed therein, and is provided inside the housing 1. The main frame 2 includes a main body portion 21, a main bearing portion 22, and a return oil pipe 23. The body portion 21 is fixed to an inner wall surface of the one end side U of the main casing 11, and as shown in fig. 2, a housing space 211 is formed at the center of the body portion 21 along the longitudinal direction of the casing 1. The housing space 211 is formed in a stepped shape having an opening at one end side U and a space narrowed toward the other end side L.
An annular flat surface 212 is formed on the one end side U of the body 21 so as to surround the housing space 211. An annular thrust plate 24 made of a steel plate material such as valve steel is disposed on the flat surface 212. Therefore, in embodiment 1, the thrust plate 24 functions as a thrust bearing. Further, a suction port 213 is formed at a position not overlapping the thrust plate 24 on the outer end side of the flat surface 212. The suction port 213 is a space that penetrates the body 21 in the vertical direction, i.e., the upper casing 12 side and the lower casing 13 side. The number of the suction ports 213 is not limited to one, and a plurality of them may be formed.
A oldham ring housing 214 is formed in a step portion of the main frame 2 on the other end side L from the flat surface 212. The 1 st oldham ring groove 215 is formed in the oldham ring housing 214. The 1 st cross-shaped sliding ring groove 215 is formed such that a part of the outer end side is cut off from 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 1 st cross land groove 215 overlaps the thrust plate 24.
The 1 st cross-shaped slip ring groove 215 is formed in a pair in an opposed manner. As shown in fig. 1, the main bearing portion 22 is formed to be continuous with the other end side L of the body portion 21, and as shown in fig. 2, a shaft hole 221 is formed inside the main bearing portion 22. The shaft hole 221 penetrates in the vertical direction of the main bearing 22, and one end side U thereof communicates with the housing space 211. The oil return pipe 23 is a pipe for returning the lubricating oil stored in the storage space 211 to an oil reservoir inside the lower casing 13, and is inserted and fixed into an oil drain hole formed to penetrate the main frame 2 inward and outward.
The lubricating oil is, for example, a refrigerator oil containing an ester-based synthetic oil. The lubricating oil is stored in the lower portion of the housing 1, that is, the lower housing 13, and is pumped up by an oil pump 52 described later to pass through an oil passage 63 in the crankshaft 6, thereby reducing wear between mechanically contacting parts such as the compression mechanism portion 3, and improving temperature adjustment and sealing performance of the sliding portion. The lubricating oil is preferably an oil having an appropriate viscosity and excellent lubricating properties, electrical insulation properties, stability, refrigerant solubility, low-temperature fluidity, and the like.
The compression mechanism 3 is a compression mechanism that compresses a refrigerant. As shown in fig. 1, the compression mechanism 3 is a scroll compression mechanism including a fixed scroll 31 and an orbiting scroll 32. The fixed scroll 31 is made of metal such as cast iron, and includes a 1 st base plate 311 and a 1 st scroll 312. The 1 st substrate 311 has a disk shape, and a discharge hole 313 is formed at the center thereof so as to penetrate in the vertical direction. Further, a circumferential groove 316 and an internal flow passage, which will be described later, are formed. The internal flow path has transverse holes 317 and longitudinal holes 318. The inner flow path may be formed by connecting the circumferential groove 316 to the compression chamber 34 or the refrigerant suction chamber 314 formed radially outward of the compression chamber 34. For example, the internal flow path may be formed linearly. The 1 st scroll 312 protrudes from a surface (lower surface) of the 1 st substrate 311 on the other end side L to form a spiral wall, and a tip thereof protrudes toward the other end side L.
The orbiting scroll 32 is made of metal such as aluminum, and includes a 2 nd base plate 321, a 2 nd scroll 322, a cylindrical portion 323, and a 2 nd oldham ring groove 324. The 2 nd base plate 321 has a disk shape including one surface on which the 1 st scroll 312 is formed, the other surface having at least a part of an outer peripheral region serving as a sliding surface, and a side surface located at the outermost portion in the radial direction and connecting the one surface and the other surface, and the sliding surface is slidably supported by the main frame 2 by the thrust plate 24. The 2 nd scroll 322 protrudes from one surface of the 2 nd base plate 321 to form a spiral wall, and the tip thereof protrudes toward the one end side U. A seal member (not shown) for suppressing refrigerant leakage is provided at the tip of the 1 st scroll 312 of the fixed scroll 31 and the tip of the 2 nd scroll 322 of the orbiting scroll 32.
The cylindrical portion 323 is a cylindrical protrusion (boss) formed to protrude from the substantially center of the other surface of the 2 nd substrate 321 toward the other end side L. A rocking bearing, a so-called journal bearing, which rotatably supports a slider 71 described later is provided on the inner circumferential surface of the cylindrical portion 323 such that the central axis thereof is parallel to the central axis of the crankshaft 6. The 2 nd cross-shaped slip ring groove 324 is an elongated circular groove formed on the other surface of the 2 nd base plate 321. The 2 nd cross-groove 324 is provided as a pair of opposed grooves. The line connecting the pair of 2 nd cross-groove grooves 324 is set orthogonal to the line connecting the pair of 1 st cross-groove grooves 215.
As shown in fig. 2, the oldham ring 33 is provided in the oldham ring housing 214 of the main frame 2. The oldham ring 33 includes an annular portion 331, a 1 st key portion 332, and a 2 nd key portion 333. The annular portion 331 is annular. The 1 st key portion 332 is formed as a pair of opposed surfaces (lower surfaces) on the other end side L of the annular portion 331, and is accommodated in the pair of 1 st cross-shaped ring grooves 215 of the main frame 2.
The 2 nd key part 333 is formed as a pair of opposing faces on the surface of the one end side U of the annular part 331, and is accommodated in a pair of 2 nd cross-groove grooves 324 of the orbiting scroll 32. When the orbiting scroll 32 orbits by the rotation of the crankshaft 6, the 1 st key 332 slides in the 1 st oldham ring groove 215 and the 2 nd key 333 slides in the 2 nd oldham ring groove 324, whereby the oldham ring 33 prevents the orbiting scroll 32 from rotating.
The compression chamber 34 is formed by meshing the 1 st scroll 312 of the fixed scroll 31 and the 2 nd scroll 322 of the oscillating scroll 32 with each other. Since the compression chamber 34 is a compression chamber whose volume decreases from the outer side toward the inner side in the radial direction, the refrigerant is gradually compressed by taking in the refrigerant from the outer end side of the scroll and moving the refrigerant toward the center side. The compression chamber 34 communicates with a discharge port 313 at the center of the fixed scroll 31.
A discharge valve 36 is provided on the surface of the one end side U of the fixed scroll 31, that is, the upper surface of the 1 st base plate 311, and the discharge valve 36 prevents the refrigerant from flowing backward by opening and closing the discharge hole 313 as predetermined. Further, an injection pipe 18 communicating with the lateral hole 317 is provided on the upper surface of the 1 st substrate 311 via a fitting 181. Further, a refrigerant suction chamber 314 for sucking the refrigerant from the injection pipe 18 is formed outside the compression chamber 34.
The refrigerant is composed of, for example, a halogenated hydrocarbon having a carbon double bond in the composition, a halogenated hydrocarbon having no carbon double bond, a hydrocarbon, or a mixture containing them. The halogenated hydrocarbon having a carbon double bond is an HFC refrigerant or a Freon-type low GWP refrigerant having an ozone depletion coefficient of zero. As the low GWP refrigerant, for example, HFO refrigerant, and tetrafluoropropene such as HFO1234yf, HFO1234ze, HFO1243zf represented by the chemical formula C3H2F4 can be exemplified.
Examples of the halogenated hydrocarbon having no carbon double bond include refrigerants mixed with R32 (difluoromethane) represented by CH2F2, R41 and the like. Examples of the hydrocarbon include propane and propylene as natural refrigerants. The mixture may be exemplified by a mixed refrigerant in which R32, R41, and the like are mixed with HFO1234yf, HFO1234ze, HFO1243zf, and the like.
As shown in fig. 1, the drive mechanism portion 4 is provided on the other end side L of the main frame 2 inside the housing 1. The drive mechanism 4 includes a stator 41 and a rotor 42. The stator 41 is, for example, a stator formed by winding a coil around a core formed by laminating a plurality of electromagnetic steel plates with an insulating layer interposed therebetween, and is formed in an annular shape. The stator 41 is fixedly supported inside the main casing 11 by shrink fitting or the like. The rotor 42 is a cylindrical rotor having a permanent magnet built in an iron core formed by laminating a plurality of electromagnetic steel plates and a through hole penetrating in the vertical direction at the center, and is disposed in the internal space of the stator 41.
The sub-frame 5 is a metal frame, and is provided on the other end side L of the drive mechanism 4 inside the housing 1. The sub-frame 5 is fixedly supported by an inner peripheral surface of the other end side L of the main casing 11 by shrink fitting, welding, or the like. The sub-frame 5 includes a sub-bearing 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 center portion of the sub-frame 5, and is disposed so that at least a part thereof is immersed in the lubricating oil stored in the oil reservoir of the housing 1.
The crankshaft 6 is a long, metal rod-like member, and is provided inside the housing 1. The crankshaft 6 includes a main shaft 61, an eccentric shaft 62, and an oil passage 63. The main shaft portion 61 is a shaft that constitutes a main portion of the crankshaft 6, and is disposed so that the central axis thereof coincides with the central axis of the main casing 11. The main shaft portion 61 has the rotor 42 fixed in contact with the outer surface thereof. The eccentric shaft portion 62 is provided at one end U of the main shaft portion 61 such that the central axis thereof is eccentric with respect to the central axis of the main shaft portion 61.
The oil passage 63 is provided inside the main shaft portion 61 and the eccentric shaft portion 62 so as to penetrate vertically. One end side U of the main shaft portion 61 of the crankshaft 6 is inserted into the main bearing portion 22 of the main frame 2, and the other end side L is inserted into the sub bearing portion 51 fixed to the sub frame 5. Thus, the eccentric shaft 62 is disposed in the cylindrical portion 323, and the rotor 42 is disposed so that the outer peripheral surface thereof maintains a predetermined gap from the inner peripheral surface of the stator 41. Further, in order to cancel out the unbalance due to the oscillation of the oscillating scroll 32, the 1 st balancer 64 is provided on one end side U of the main shaft portion 61, and the 2 nd balancer 65 is provided on the other end side L.
The bush 7 is made of metal such as iron, and is a connecting member for connecting the orbiting scroll 32 and the crankshaft 6. In embodiment 1, as shown in fig. 2, the bush 7 is composed of 2 parts, and includes a slider 71 and a balance weight 72. The slider 71 is a cylindrical member having a flange formed thereon, and is fitted into the eccentric shaft portion 62 and the cylindrical portion 323, respectively, as shown in fig. 1. As shown in fig. 2, the balance weight 72 is a doughnut-shaped member including a weight portion 721 having a substantially C-shape as viewed from the one end side U, and is provided so as to be eccentric with respect to the rotation center in order to cancel the centrifugal force of the orbiting scroll 32. The balance weight 72 is fitted to the flange of the slider 71 by, for example, shrink fitting or the like.
The power supply portion 8 is a power supply member for supplying power to the scroll compressor, and is formed on the outer peripheral surface of the main casing 11 of the casing 1 as shown in fig. 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 bottom 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 housing 1. One of the wires 83 is connected to the power supply terminal 82, and the other is connected to the stator 41.
Next, the relationship between the housing 1 and the compression mechanism 3 will be described in further detail with reference to fig. 3 and 4. Fig. 4 is an enlarged view of an area of a two-dot chain line of the scroll compressor shown in fig. 3.
Although described above, as shown in fig. 4, the main casing 11 has: 1 st inner wall surface 111; a 1 st projection 112 projecting from the 1 st inner wall surface 111 and positioning the fixed scroll 31; and a 1 st positioning surface 113 facing the upper case 12 side in the 1 st projection 112. That is, the main housing 11 includes a stepped portion whose inner diameter increases toward the other end side L. The fixed scroll 31 is fixed to the 1 st inner wall surface 111 by shrink fitting, press fitting, or the like in a state of being positioned by the 1 st positioning surface 113.
By configuring the main casing 11 as described above and fixing the fixed scroll 31 by shrink fitting, press fitting, or the like, the main frame 2 does not need a circumferential wall for screwing the fixed scroll 31 as in the conventional case. That is, the side surface of the 2 nd base plate 321 is disposed to face the inner wall surface of the main casing 11, and a wall of the main frame 2 is not interposed between the side surface of the 2 nd base plate 321 of the orbiting scroll 32 and the inner wall surface of the main casing 11 (hereinafter, referred to as a no main frame wall structure). Therefore, the 1 st scroll 312 of the fixed scroll 31 and the 2 nd scroll 322 of the orbiting scroll 32 can be provided outside the conventional scroll, and therefore the volume of the compression chamber 34 can be increased. Further, since the structure of the main frame 2 can be simplified, workability is good, and weight reduction can be achieved.
As shown in fig. 3, the outer diameter of the upper casing 12 is smaller than the one end side of the main casing 11, so that the fixed scroll 31 is sandwiched between the upper casing 12 and the 1 st set surface 113 of the 1 st projection 112. This allows the fixed scroll 31 to be pressed against the 1 st positioning surface 113 by the upper casing 12 during manufacturing, and thus the positioning accuracy of the fixed scroll 31 can be improved. Further, it is possible to suppress a vertical positional shift of the fixed scroll 31 due to vibrations or the like that may occur during transportation and during driving of the scroll compressor. Further, if at least a part of the outer wall surface of the upper casing 12 is in a state of being in contact with the inner wall surface of the main casing 11, the fixing strength of the main casing 11 and the upper casing 12 by welding or the like is improved, and the vertical positional displacement of the fixed scroll 31 can be suppressed, which is more preferable.
Fig. 5 is a partial sectional view of the fixed scroll 31 of the scroll compressor according to embodiment 1 of the present invention.
Next, the circumferential groove 316, the lateral hole 317, and the longitudinal hole 318 formed in the fixed scroll 31 will be described.
As shown in fig. 5, a circumferential groove 316 is formed along the outer circumferential surface of the 1 st substrate 311. The circumferential grooves 316 are formed over the entire circumference of the outer peripheral surface of the 1 st substrate 311, for example, but may be formed intermittently on the outer peripheral surface of the 1 st substrate 311. The lateral hole 317 is formed in the horizontal direction from the outer side (side surface side) of the 1 st substrate 311 toward the center, and is formed so as to communicate the injection pipe 18 with the circumferential groove 316. Further, a vertical hole 318 is formed outside the 1 st base plate 311 in the vertical direction so as to communicate the horizontal hole 317 with the refrigerant suction chamber 314. That is, the circumferential groove 316, the lateral hole 317, and the vertical hole 318 form an injection flow path. In the above description, the example in which the lateral hole 317 is orthogonal to the vertical hole 318 has been described, but the present invention is not limited to this, and the lateral hole 317 and the vertical hole 318 may not be orthogonal.
Therefore, the low-pressure gas refrigerant flowing into the casing 1 from the injection pipe 18 is guided to the refrigerant suction chamber 314 through the lateral hole 317, the circumferential groove 316, and the vertical hole 318, and cools the refrigerant during compression.
The side surface (hereinafter also referred to as the outer peripheral surface) of the 1 st substrate 311 is coated with any one of DLC (diamond-like carbon), DLC-Si (diamond-like carbon-silicon), CrN (chromium nitride), TiN (titanium nitride), TiCN (titanium carbonitride), WCC (tungsten carbide coating), VC (vanadium carbide), and the like.
Here, the fixed scroll 31 is fixed to the 1 st inner wall surface 111 of the housing 1 by shrink fitting, press fitting, or the like, but the sealing length of the fixed scroll 31 is shortened by forming the circumferential groove 316 along the outer peripheral surface of the 1 st base plate 311. Accordingly, by performing the coating treatment on the side surface of the 1 st substrate 311, the surface roughness is improved, the sealing property of the circumferential groove 316 is improved, and the gas refrigerant flowing through the circumferential groove 316 does not leak, so that the performance can be prevented from being lowered.
In this way, in the main-frame-wall-less structure, by forming the injection flow path as described above, the 1 st scroll 312 of the fixed scroll 31 and the 2 nd scroll 322 of the orbiting scroll 32 can be provided to the outer side than the conventional one. Therefore, the volume of the compression chamber 34 can be increased, and therefore, for example, the heights of the 1 st scroll 312 and the 2 nd scroll 322 can be reduced. In addition, the inflow position of the jet can be made to be the outside. As a result, the degree of freedom in design can be improved. Further, since the structure of the main frame 2 can be simplified, workability is good, and weight reduction can be achieved.
As described above, the scroll compressor according to embodiment 1 is a scroll compressor to which the injection pipe 18 is connected, and includes: a fixed scroll 31 having a 1 st base plate 311 and a 1 st scroll 312; an oscillating scroll 32 having a 2 nd base plate 321 and a 2 nd scroll 322 and forming a compression chamber 34 together with the fixed scroll 31; and a housing 1 that houses the fixed scroll 31 and the orbiting scroll 32, the fixed scroll 31 including: a circumferential groove 316 provided on the outer circumferential surface of the 1 st base plate 311 and forming a flow path for the refrigerant flowing from the injection pipe 18 with the inner wall surface of the housing 1; and an internal flow path that connects the circumferential groove 316 to the compression chamber 34 or a refrigerant suction chamber 314 formed radially outward of the compression chamber 34.
According to the scroll compressor of embodiment 1, since the injected refrigerant is supplied from the internal flow passage provided in the fixed scroll 31, the injected refrigerant can be supplied to the target portion with high accuracy.
Further, according to the scroll compressor of embodiment 1, the fixed scroll 31 is fixed to the housing 1 by shrink-fitting or press-fitting the fixed scroll 31 into the housing 1 without providing a peripheral wall on the main frame 2. Further, a circumferential groove 316 that communicates the ejection tube 18 with the longitudinal hole 318 is provided on the outer circumferential surface of the 1 st substrate 311. Therefore, the volume of the compression chamber 34 can be increased, the inflow position of the injection can be made to be the outer side, and the degree of freedom in design can be improved.
Further, according to the scroll compressor of embodiment 1, since the fixed scroll 31 is provided with the flow path through which the injected refrigerant flows, it is possible to suppress a temperature rise of the fixed scroll 31. Therefore, according to embodiment 1, deformation or the like due to a temperature increase of the fixed scroll 31 can be suppressed. In embodiment 1, the refrigerant flowing from the injection pipe 18 is supplied to the circumferential groove 316 from the radially inner side of the circumferential groove 316. That is, the refrigerant flowing from the injection pipe 18 is supplied to the compression mechanism portion 3 through the lateral hole 317, the circumferential groove 316, the lateral hole 317, and the vertical hole 318. Therefore, in embodiment 1, since the flow path through which the injection refrigerant flows can be formed long, the temperature rise of the fixed scroll 31 can be easily suppressed.
In the scroll compressor according to embodiment 1, the side surface of the 1 st substrate 311 is coated. According to the scroll compressor of embodiment 1, the surface roughness can be improved by performing the coating treatment on the side surface of the 1 st substrate 311. Further, the coating treatment may be applied to the 1 st inner wall surface 111 of the housing 1. That is, the fixed scroll 31 or the housing 1 may be coated at a position where the fixed scroll 31 and the housing 1 are fixed. Therefore, the sealing performance of the circumferential groove 316 can be improved, and the gas refrigerant flowing through the circumferential groove 316 can be prevented from leaking, so that the performance can be prevented from being lowered.
In the above description, an example was described in which the fixed scroll 31 is fixed to the 1 st inner wall surface 111 of the housing 1, and a flow path through which the injection refrigerant flows is formed between the circumferential groove 316 formed in the outer circumferential surface of the fixed scroll 31 and the 1 st inner wall surface 111 of the housing 1, but embodiment 1 is not limited to this. That is, in embodiment 1, the fixed scroll 31 may not be fixed to the 1 st inner wall surface 111 of the housing 1, but a seal member may be provided between the outer peripheral surface of the fixed scroll 31 and the 1 st inner wall surface 111 of the housing 1, and a flow path through which the injection refrigerant flows may be formed between the circumferential groove 316 formed in the outer peripheral surface of the fixed scroll 31 and the 1 st inner wall surface 111 of the housing 1. That is, embodiment 1 can be applied to a scroll compressor other than the no-main-frame-wall structure. In the above description, a vertical scroll compressor is taken as an example, but embodiment 1 can also be applied to a horizontal scroll compressor.
Hereinafter, although embodiment 2 of the present invention will be described, description of the configuration overlapping with embodiment 1 will be omitted, and the same reference numerals will be given to the same or corresponding portions as embodiment 1.
Fig. 6 is an enlarged top view in longitudinal schematic cross section of a scroll compressor according to embodiment 2 of the present invention.
In embodiment 1, the vertical hole 318 is formed so that the lateral hole 317 communicates with the refrigerant suction chamber 314, but in embodiment 2, as shown in fig. 6, the vertical hole 318 is located inward of the case of embodiment 1, and is formed so that the lateral hole 317 communicates with the compression chamber 34. Therefore, in embodiment 2, the low-pressure gas refrigerant flowing into the casing 1 from the injection pipe 18 is guided to the compression chamber 34 through the lateral hole 317, the circumferential groove 316, and the vertical hole 318, and cools the refrigerant during compression.
According to the scroll compressor of embodiment 2, the same effects as those of embodiment 1 can be obtained.
Embodiment 3.
Although embodiment 3 of the present invention will be described below, description of the configuration overlapping with embodiments 1 and 2 will be omitted, and the same reference numerals are given to the same or corresponding portions as those in embodiments 1 and 2.
Fig. 7 is an enlarged top view in longitudinal schematic cross section of a scroll compressor according to embodiment 3 of the present invention. Fig. 8 is an enlarged top view in longitudinal schematic cross section of a modification of the scroll compressor according to embodiment 3 of the present invention.
In embodiment 1, the injection pipe 18 is provided on the upper surface of the 1 st substrate 311 via the fitting 181 communicating with the lateral hole 317, but in embodiment 3, as shown in fig. 7, the injection pipe 18 is provided on the outer peripheral surface of the 1 st substrate 311 so as to communicate with the circumferential groove 316. However, the injection pipe 18 is welded to the main casing 11, and the fixing strength can be improved by flanging the main casing 11 and welding the injection pipe 18 to the flanged portion of the main casing 11.
As shown in fig. 8, the injection pipe 18 may be provided on the side surface of the 1 st substrate 311 via the adapter 182 communicating with the circumferential groove 316. Here, the fixing is performed by welding the adapter 182 to the main casing 11, and the fixing is performed by welding the injection pipe 18 to the adapter 182.
In assembling the scroll compressor, the upper casing 12 is a part to be assembled last, but if the injection pipe 18 is provided in the upper casing 12, the injection pipe 18 and the fitting 181 need to be aligned in this state, and the assembling workability is poor. Accordingly, by providing the injection pipe 18 on the side surface of the 1 st substrate 311 as in embodiment 3, the assembling workability can be improved.
Description of reference numerals:
1 … outer shell; 2 … main frame; 3 … compression mechanism part; 4 … driving mechanism part; 5 … subframe; 6 … crankshaft; 7 … a bush; 8 … power supply part; 11 … a main housing; 12 … an upper shell; 13 … a lower housing; 14 … suction tube; 15 … discharge pipe; 17 … fixed table; 18 … ejector tube; 21 … a body portion; 22 … main bearing portion; 23 … return line; 24 … thrust plate; 31 … fixed scroll; 32 … oscillating scroll member; 33 … cross slip ring; 34 … compression chamber; 36 … discharge valve; 41 … stator; 42 … rotor; 51 … secondary bearing section; 52 … oil pump; 61 … a main shaft portion; 62 … eccentric shaft part; 63 … oil passage; 64 … balance 1; 65 … balance 2; 71 … a slider; 72 … balance weight; an 81 … cover; 82 … power supply terminals; 83 … wiring; 111 … inner wall surface No. 1; 112 … projection No. 1; 113 …, 1 st orientation surface; 181 … fittings; 182 … adapters; 211 … accommodating space; 212 … flat face; 213 … suction inlet; 214 … cross slip ring containing part; 215 … No. 1 cross sliding ring groove; 221 … axle hole; 311 … substrate 1; 312 … scroll 1; 313 … discharge orifice; 314 … refrigerant suction chamber; 316 … circumferential groove; 317 … transverse holes; 318 … longitudinal hole; 321 … No. 2 substrate; 322, 322 … scroll 2; 323 … cylindrical portion; 324 … cross groove 2; 331 … annular portion; 332 … key 1; 333 … key 2; 721 … counterweight.
Claims (8)
1. A scroll compressor is connected with an injection pipe, and is characterized by comprising:
a fixed scroll having a 1 st base plate and a 1 st scroll;
an oscillating scroll having a 2 nd base plate and a 2 nd scroll, and forming a compression chamber together with the fixed scroll; and
a housing that houses the fixed scroll and the oscillating scroll,
the fixed scroll includes:
a circumferential groove provided on the outer circumferential surface of the 1 st base plate and forming a flow path for the refrigerant flowing from the injection pipe to flow between the circumferential groove and the inner wall surface of the housing; and
and an internal flow path that communicates the circumferential groove with the compression chamber or a refrigerant suction chamber formed radially outward of the compression chamber.
2. The scroll compressor of claim 1,
the internal flow path has:
a lateral hole communicating with the circumferential groove and forming a flow path from the circumferential groove to the inside in the radial direction; and
and a longitudinal hole communicating with the lateral hole to form a flow path communicating with the compression chamber or the refrigerant suction chamber.
3. The scroll compressor of claim 2,
the longitudinal hole is formed to communicate the lateral hole with the refrigerant suction chamber.
4. The scroll compressor of claim 2,
the longitudinal hole is formed to communicate the transverse hole with the compression chamber.
5. The scroll compressor of any one of claims 1 to 4,
the outer peripheral surface of the 1 st substrate is fixed to the inner wall surface of the housing.
6. The scroll compressor of any one of claims 1 to 5,
the refrigerant flowing from the injection pipe is supplied to the circumferential groove from a position radially outward of the circumferential groove.
7. The scroll compressor of any one of claims 1 to 5,
the refrigerant flowing from the injection pipe is supplied to the circumferential groove from a position radially inward of the circumferential groove.
8. The scroll compressor of any one of claims 1 to 7,
the side surface of the 1 st substrate was subjected to a film coating treatment.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2018/017262 WO2019207785A1 (en) | 2018-04-27 | 2018-04-27 | Scroll compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111989493A true CN111989493A (en) | 2020-11-24 |
Family
ID=68293979
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201880092084.2A Withdrawn CN111989493A (en) | 2018-04-27 | 2018-04-27 | Scroll compressor having a plurality of scroll members |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JPWO2019207785A1 (en) |
| CN (1) | CN111989493A (en) |
| WO (1) | WO2019207785A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7203796B2 (en) * | 2020-09-30 | 2023-01-13 | 三菱重工サーマルシステムズ株式会社 | scroll compressor |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1107555A (en) * | 1993-11-03 | 1995-08-30 | 科普兰公司 | Scroll compressor oil circulation system |
| CN202690457U (en) * | 2011-12-15 | 2013-01-23 | 上海日立电器有限公司 | Jet pipe device for scroll compressor |
| JP2013155679A (en) * | 2012-01-31 | 2013-08-15 | Toyota Industries Corp | Scroll compressor |
| WO2016079858A1 (en) * | 2014-11-20 | 2016-05-26 | 三菱電機株式会社 | Scroll compressor |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006241993A (en) * | 2005-02-28 | 2006-09-14 | Mitsubishi Heavy Ind Ltd | Scroll compressor |
| KR101576459B1 (en) * | 2009-02-25 | 2015-12-10 | 엘지전자 주식회사 | Scoroll compressor and refrigsrator having the same |
| KR102103362B1 (en) * | 2013-11-11 | 2020-04-22 | 엘지전자 주식회사 | A scroll compressor and an air conditioner including the same |
| JP6460595B2 (en) * | 2014-12-04 | 2019-01-30 | 株式会社デンソー | Compressor |
| JP2016142258A (en) * | 2015-02-05 | 2016-08-08 | アイシン精機株式会社 | Scroll compressor |
| JP6470697B2 (en) * | 2015-02-27 | 2019-02-13 | ダイキン工業株式会社 | Compressor |
| JP2017120048A (en) * | 2015-12-28 | 2017-07-06 | ダイキン工業株式会社 | Scroll compressor |
| ES2821929T3 (en) * | 2016-07-14 | 2021-04-28 | Daikin Ind Ltd | Compressor that has a silencer function |
-
2018
- 2018-04-27 WO PCT/JP2018/017262 patent/WO2019207785A1/en active Application Filing
- 2018-04-27 JP JP2020515448A patent/JPWO2019207785A1/en active Pending
- 2018-04-27 CN CN201880092084.2A patent/CN111989493A/en not_active Withdrawn
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1107555A (en) * | 1993-11-03 | 1995-08-30 | 科普兰公司 | Scroll compressor oil circulation system |
| CN202690457U (en) * | 2011-12-15 | 2013-01-23 | 上海日立电器有限公司 | Jet pipe device for scroll compressor |
| JP2013155679A (en) * | 2012-01-31 | 2013-08-15 | Toyota Industries Corp | Scroll compressor |
| WO2016079858A1 (en) * | 2014-11-20 | 2016-05-26 | 三菱電機株式会社 | Scroll compressor |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2019207785A1 (en) | 2019-10-31 |
| JPWO2019207785A1 (en) | 2020-12-03 |
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Application publication date: 20201124 |
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