JP2010090859A - Scroll type fluid machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a scroll type fluid machine properly supplying the minimum required amount of a lubricant at the high speed and low speed rotation of a movable scroll and sufficiently securing sealing performance of a sliding section between the movable scroll and a fixed scroll, and improving power efficiency. <P>SOLUTION: The movable scroll has a first communication passage which is communicated with a back pressure chamber and has an opening on an end plate surface of the movable scroll, and a second communication passage which is communicated with a boss section and has an opening on the end plate surface of the movable scroll. The fixed scroll 36 has opening edges 70a, 71a on the end plate surface of the fixed scroll, and has oil injection communication passages 70, 71, 80, and 81 for intermittently supplying the lubricant to a compression chamber when the opening edge meets an opening edge of first or second communication passage by a revolution circling motion of the movable scroll. The oil injection communication passage supplies the lubricant to the compression chamber every time the movable scroll performs revolution circling one time. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a scroll type fluid machine, and more particularly to a scroll type fluid machine suitable for a refrigeration air conditioner and a heat pump type water heater.

This type of scroll fluid machine, for example, a hermetic scroll compressor, performs a series of processes of suction, compression, and discharge of a refrigerant containing lubricating oil by revolving orbiting the movable scroll with respect to the fixed scroll in the housing. We are carrying out.
Specifically, spiral wraps are provided on the end plate surfaces of the movable and fixed scroll end plates, respectively, and these laps cooperate to form a compression chamber, and the volume of the compression chamber is reduced to reduce the volume of the above-described series. The process is implemented.

By the way, in such a scroll type fluid machine, it is important to prevent a refrigerant from leaking by sealing a compression chamber formed by meshing the scroll wraps of each scroll.
Therefore, normally, in order to improve the sealing performance of the compression chamber, the lubricant is supplied to the meshing portion of the movable scroll and the fixed scroll by supplying the lubricant mixed with the refrigerant flowing into the compression chamber. .

However, when the lubricant is mixed and supplied in this way, the refrigerant leaks from the compression chamber due to the processing accuracy of the spiral wrap, and the required amount of lubricant is not supplied to the compression chamber. Therefore, there is a problem that the sealing performance of the compression chamber cannot be maintained.
Therefore, in order to supply the required amount of lubricating oil to the compression chamber, a configuration is known in which a movable passage that can forcibly supply the lubricating oil sucked by the oil pump to the compression chamber is provided in the end plate of the movable scroll ( Patent Document 1).
JP-A-9-144675

Lubricating oil flowing on the back side of the movable scroll is usually pumped to the back side of the movable scroll under the refrigerant discharge pressure, and applies back pressure to the movable scroll to press the movable scroll against the fixed scroll while performing lubrication. ing. Therefore, the back pressure is kept slightly higher than the pressure in the compression chamber.
With respect to this point, the conventional technique disclosed in Patent Document 1 is configured to continuously supply the lubricating oil by supplying the lubricating oil to the compression chamber by the differential pressure between the back pressure chamber and the compression chamber. .

  However, in such a configuration, when the movable scroll rotates at a high speed, the circulation amount of the refrigerant increases and the amount of the lubricating oil contained in the refrigerant also increases. Therefore, if the lubricating oil is supplied in such a state, the bottom portion in the housing There is a problem that the lubricating oil stored in the oil storage chamber in the oil storage chamber suddenly decreases, and the lubricating oil cannot be supplied to the compression chamber. On the other hand, when the orbiting scroll rotates at a low speed, the circulation amount of the refrigerant decreases, and the amount of lubricating oil contained in the refrigerant decreases. Therefore, a large amount of lubricating oil needs to be supplied, and the supply of lubricating oil to the compression chamber becomes excessive. There's a problem.

The present invention has been made to solve the above-described problems, and its object is to
When the movable scroll rotates at high speed and low speed, the required minimum amount of lubricating oil can be properly supplied to ensure sufficient sealing performance of the sliding part of the movable scroll and the fixed scroll, thereby improving the power efficiency. It is to provide a scroll type fluid machine.

  In order to achieve the above object, a scroll type fluid machine according to claim 1 extends in a container and is rotatably supported by the container, a fixed scroll provided in the container, and the fixed scroll. A working fluid having a movable scroll revolving around the axis of the scroll, and reducing the volume of a compression chamber formed between the movable scroll and the spiral wrap of the fixed scroll by the revolving revolving motion of the movable scroll A scroll unit that performs a series of suction, compression, and discharge processes, a spindle frame that is housed in the container and includes a bearing that supports the rotating shaft, an upper surface of the spindle frame, and a mirror plate surface of the movable scroll And a back pressure chamber filled with the lubricating oil pressurized at a higher pressure on the inner peripheral side than on the outer peripheral side, and the movable scroll A boss provided projectingly on the rear surface of the peripheral side, a first communication path extending through the movable scroll, having one end opened to the back pressure chamber, and the other end opened to the end plate surface of the movable scroll; A second communication path extending in the movable scroll, having one end opened in the boss portion and the other end opened in the end plate surface of the movable scroll, and extending in the fixed scroll, and one end is the end plate surface of the fixed scroll An opening end provided on the wall side of the spiral wrap of the fixed scroll when the opening end is aligned with the opening end of the upper end of the first or second communication path by the revolving orbiting motion of the movable scroll. And an oil injection communication passage for intermittently supplying the lubricant from the oil injection passage. The oil injection communication passage supplies the lubricant to the compression chamber once for each revolution of the movable scroll. The features.

According to a second aspect of the present invention, there is provided the scroll type fluid machine according to the first aspect, wherein the oil injection communication path has an opening end for supplying lubricating oil at a predetermined position on the end plate surface of the fixed scroll immediately before the compression chamber is formed. It is characterized by being arranged respectively.
According to a third aspect of the present invention, in the scroll type fluid machine according to the first or second aspect, the oil injection communication path is formed from the fixed scroll in the compression chamber formed in the outer periphery of each spiral wrap of the movable scroll and the fixed scroll. Both wall sides of the spiral wrap erected from the first oil injection communication path having open ends at predetermined positions on both wall sides of the spiral wrap to be erected and the fixed scroll formed on the inner peripheral portion of each of the spiral wraps And a second oil injection communication path having an open end at a predetermined position.

  According to the scroll type fluid machine of the first aspect, the movable scroll has a first communication path having one end opened in the back pressure chamber and the other end opened in the end plate surface of the movable scroll, and one end opened in the boss portion. A second communication path is formed with the other end opening on the end plate surface of the movable scroll. The fixed scroll has one end opening on the end plate surface of the fixed scroll, and the opening end is moved by the revolving orbiting motion of the movable scroll. An oil injection communication path for intermittently supplying lubricating oil from the opening end provided on the wall side of the fixed scroll forming the compression chamber by being combined with the opening end of the first or second communication path is formed.

As a result, the required amount of lubricating oil is supplied even during high-speed rotation of the movable scroll, so that insufficient supply of lubricating oil to the compression chamber can be prevented, and the space between the scrolls of the movable scroll and the fixed scroll is excellent. Since sealing is performed, the sealing performance of the compression chamber is improved, and the compression efficiency can be increased.
In addition, since the lubricating oil is supplied to the wall side of the compression chamber once every time the movable scroll makes one revolution, the minimum amount of lubricating oil is supplied even when the movable scroll rotates at a low speed. Since the volumetric efficiency of the refrigerant in the chamber is improved, the power efficiency of the scroll type fluid machine can be improved.

And since lubricating oil is supplied between the walls of each spiral wrap which forms a compression chamber, the oil film of a sliding part becomes thick and it can prevent abrasion of a sliding part.
According to the scroll type fluid machine of claim 2, since the lubricating oil is intermittently supplied from the oil injection communication path immediately before the compression chamber is formed, the sealing property between the walls of the spiral wraps forming the compression chamber. It is possible to improve the compression efficiency.

  According to the scroll type fluid machine of claim 3, the oil injection communication path has the first oil having an open end at a predetermined position on both wall sides of the compression chamber formed in the outer peripheral portion of each spiral wrap of the movable scroll and the fixed scroll. Since the second oil injection communication path having the open ends is formed at predetermined positions on both wall sides of the compression chamber formed on the inner peripheral portion of each spiral wrap, each spiral wrap that is an intermediate pressure is formed Lubricating oil is not only supplied between the walls of the compression chamber at the outer peripheral portion of the inner wall but also the lubricating oil is supplied between the walls of the compression chamber at the inner peripheral portion of each spiral wrap having a high pressure.

  Therefore, since the space between the walls of the sliding portion is sealed well overall, the sealing performance of the compression chamber formed by the spiral wrap of the movable scroll and the fixed scroll is improved, and the compression efficiency can be further improved.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a sectional view of a hermetic scroll compressor which is one of scroll type fluid machines according to the present invention.
A scroll compressor (hereinafter referred to as a compressor) 1 is incorporated in a refrigeration circuit such as a refrigeration air conditioner or a heat pump water heater. The circuit includes a path through which carbon dioxide refrigerant (hereinafter referred to as refrigerant), which is an example of a working fluid, circulates, and the compressor 1 sucks the refrigerant from the path, compresses it, and discharges it toward the path.

  As shown in the figure, the compressor 1 includes a housing 2, and a body portion 4 of the housing 2 is hermetically fitted with an upper lid 6 and a lower lid 8 on the upper side and the lower side, respectively. The inside is sealed and a high discharge pressure is acting. Further, a suction pipe 10 for sucking refrigerant taken in from the circuit is connected to the body 4, and a discharge pipe 12 for sending compressed refrigerant in the housing 2 to the circuit is connected to an appropriate position of the upper lid 6. Yes.

An electric motor 14 is accommodated in the body 4, and a rotating shaft 16 is disposed in the motor 14. The rotating shaft 16 is driven by energization of the motor 14. Moreover, the upper end side of the rotating shaft 16 is rotatably supported by the spindle frame 18 via a bearing.
On the other hand, the lower end side of the rotating shaft 16 is rotatably supported by the countershaft frame 20 via a bearing. An oil pump 22 is mounted on the lower end side of the rotary shaft 16, and the pump 22 sucks the lubricating oil in the oil storage chamber 24 formed inside the lower lid 8, that is, at the bottom of the housing 2. The lubricating oil functions as a lubricant for each sliding portion and a bearing, and a sliding surface seal through an oil supply passage 26 formed along the axis inside the rotating shaft 16.

Note that the discharge pressure of the refrigerant acts on the oil surface of the lubricating oil in the oil storage chamber 24, and the fact that the discharge pressure of the refrigerant acts on the oil surface of the lubricating oil also contributes to the increase of the lubricating oil in the oil supply passage 26. . As a result, the outlet of the oil supply passage 26 is in a high pressure environment substantially equal to the refrigerant discharge pressure.
A lubricating oil introduction port 30 is formed at an appropriate position of the countershaft frame 20, and the lubricating oil supplied to each sliding portion in the compressor 1 enters the oil storage chamber 24 via the introduction port 30. Stored.

The scroll unit 28 is disposed above the motor 14 in the body 4 and performs a series of processes of refrigerant suction, compression, and discharge.
Specifically, the scroll unit 28 is composed of a movable scroll 34 and a fixed scroll 36, and the scrolls 34, 36 are respectively provided with spiral wraps 34 a, 36 a on the opposing surfaces. A compression chamber 39 is formed between 34a and 36a. As a result, when the movable scroll 34 pivots with respect to the fixed scroll 36, the spiral wraps 34 a and 36 a mesh with each other, and cooperate to form refrigerant from the suction chamber formed on the outer peripheral side of the movable scroll 34 through the suction pipe 10. Is sucked into the compression chamber 39, and the volume is reduced while the compression chamber 39 moves toward the center of the spiral wraps 34a, 36a, and the refrigerant is compressed.

  In order to impart a turning motion to the movable scroll 34 described above, a boss portion 38 is formed on the rear surface 34 b of the movable scroll 34 so as to protrude, and this boss portion 38 is connected to the crank pin 42 via a bearing 44. . The crank pin 42 is integrally formed on the upper end side of the rotating shaft 16, and causes the movable scroll 34 to make a revolving orbiting motion on the spindle frame 18 as the rotating shaft 16 rotates. The rotation of the movable scroll 34 is blocked by a rotation blocking pin (not shown).

The movable scroll 34 is provided with a communication path (first communication path) 60 extending from the back surface 34 b of the movable scroll 34. Further, a communication path (second communication path) 62 connecting the boss portion 38 and the end plate surface 34c of the movable scroll 34 is formed.
The fixed scroll 36 is fixed to the spindle frame 18 and partitions the discharge chamber 54 side and the compression chamber 39 side formed in the upper lid 6. Specifically, a cylindrical outer peripheral wall 19 concentrically with the rotary shaft 16 extends toward the fixed scroll 36 on the main spindle frame 18, and the fixed scroll 36 is joined to the upper edge of the outer peripheral wall 19.

  As described above, the fixed scroll 36 is joined to the upper edge of the outer peripheral wall 19, so that a swivel sliding region in which the movable scroll 34 slides is formed between the fixed scroll 36 and the spindle frame 18. Yes. A gap 45 is formed between the upper surface of the spindle frame 18, the end plate surface of the fixed scroll 36, the movable scroll 34, and the outer peripheral wall 19 in the orbiting / sliding region. The air gap 45 constitutes a back pressure chamber 46, and the back pressure chamber 46 is filled with high-pressure lubricating oil discharged from the outlet of the oil supply passage 26.

  2, oil injection communication passages 70, 71, 80, 81 are formed in the end plate of the fixed scroll, respectively, as shown in a cross-sectional view along the line AA in FIG. The oil injection communication passages (first oil injection communication passages) 70 and 71 have opening ends 70 a and 71 a serving as oil supply inlets at predetermined positions on the end plate surface 36 c of the fixed scroll 36. The opening ends 70a and 71a are opened at positions where lubricating oil is supplied from the opening ends 70b and 71b immediately before the compression chamber 39 is formed. One opening end 70b is opened at a predetermined position on the wall side of the end plate surface 36c of the fixed scroll 36 in the outer compression chamber 39 in the compression chamber 39 formed in the outer peripheral portion, and the other opening end 71b is arranged on the inner side. The fixed scroll 36 in the compression chamber 39 is opened at a predetermined position on the wall side of the end plate surface 36c.

  The oil injection communication passages (second oil injection communication passages) 80 and 81 have opening ends 80 a and 81 a that serve as oil supply inlets at predetermined positions on the end plate surface 36 c of the fixed scroll 36. The opening ends 80a and 81a are opened at positions where lubricating oil is supplied from the opening ends 80b and 81b immediately before the compression chamber 39 is formed. One opening end 80b is opened at a predetermined position on the wall side of the end plate surface 36c of the fixed scroll 36 in the inner compression chamber 39 in the compression chamber 39 formed in the inner peripheral portion, and the other opening end 81b is outside. Is opened at a predetermined position on the wall side of the end plate surface 36 c of the fixed scroll 36 in the compression chamber 39.

  Then, as the movable scroll 34 revolves and revolves, the opening end 60a of the communication passage 60 provided by being drilled in the movable scroll 34 is an opening end 70a or 71a that serves as a fuel supply inlet of the oil injection communication passages 70 and 71. In other words, the opening end 62a of the communication passage 62 provided in the movable scroll 34 is configured to be combined with the opening end 80a or 81a serving as the oil supply inlet of the oil injection communication passages 80 and 81.

  Specifically, as shown in FIG. 3 which is a longitudinal sectional view taken along the line BB in FIG. 2, the communication path 60 is formed in the movable scroll 34 so as to extend from the back surface 34b of the movable scroll 34. One end of 60 communicates with the back pressure chamber 46, and the other end opens at a predetermined position on the end plate surface 34 c of the movable scroll 34. The oil injection communication paths 70 and 71 are formed in the end plate of the fixed scroll 36. One end of the oil injection communication path 70 is opened at a predetermined position on the end plate surface 36c, and the other end is formed in the outer peripheral portion. It communicates with the outer compression chamber 39. One end of the oil injection communication path 71 opens at a predetermined position on the end plate surface 36c, and the other end communicates with an inner compression chamber 39 formed on the outer peripheral portion.

  Further, as shown in FIG. 4 which is a longitudinal sectional view taken along the line CC of FIG. 2, the communication path 62 is provided in the movable scroll 34, and one end of the communication path 62 is formed at the boss portion 38. The other end opens on the end plate surface 34 c of the movable scroll 34. The oil injection communication passages 80 and 81 are formed in the end plate of the fixed scroll 36. One end of the oil injection communication passage 80 opens to a predetermined position on the end plate surface 36c of the fixed scroll 36, and the other end is The spiral wraps 34a and 36a communicate with an inner compression chamber 39 formed on the inner periphery of the spiral wraps 34a and 36a. Further, one end of the oil injection communication passage 81 opens at a predetermined position on the end plate surface 36c of the fixed scroll 36, and the other end communicates with an outer compression chamber 39 formed on the inner peripheral portion.

Returning to FIG. 1, a discharge hole 52 communicating with the compression chamber 39 side is formed at an appropriate position in the center portion of the fixed scroll 36, and the discharge hole 52 is formed on the back surface 36 b side of the fixed scroll 36. It is opened and closed by the arranged discharge valve 54. Further, the discharge valve 54 is covered with a discharge head 56, and the sound when the discharge valve 54 is opened is suppressed by the discharge head 56.
Hereinafter, an operation of the scroll type fluid machine according to the present invention configured as described above will be described.

  According to the compressor 1 described above, when the rotating shaft 16 is rotated by the electric motor 14, the movable scroll 34 starts a revolving orbiting motion. The revolving orbiting motion of the movable scroll 34 sucks the refrigerant from the suction pipe 10 toward the inside of the scroll unit 30 and compresses the refrigerant while reducing the volume of the compression chamber 39. The high-pressure refrigerant compressed in this way is discharged from the discharge hole 52 and circulates while separating the lubricating oil in the housing 2, and is then sent out of the compressor through the discharge pipe 12 from the discharge chamber 50.

  Then, when the orbiting scroll 34 is revolved and revolved, the opening ends 70a and 71a serving as the oil supply inlets of the oil injection communication paths 70 and 71 are aligned with the opening end 60a of the communication path 60 provided in the orbiting scroll 34. Thus, immediately before the compression chamber 39 finishes closing the refrigerant, the lubricating oil passes through the oil injection communication passages 70 and 71 and is movable from the open ends 70b and 71b at the predetermined positions of the outer and outer compression chambers 39. Supplied intermittently between the spiral wraps 34 a and 36 a of the scroll 34 and the fixed scroll 36 and between the side surfaces of the spiral wrap 34 a of the movable scroll 34 and the inner wall of the fixed scroll 36.

  Thus, according to the scroll type fluid machine according to the present invention, when the opening end 60a of the communication passage 60 provided in the movable scroll 34 and the opening end 70a which is the oil supply inlet of the oil injection communication passage 70 are combined. Further, in the compression chamber 39 at the outer peripheral portion formed by the spiral wraps 34a and 36a of the movable scroll 34 and the fixed scroll 36 from the opening end 70b which is the oil supply outlet, the lubricating oil passes from the communication path 60 to the oil injection communication path 70. , And supplied between the side surface of the spiral wrap 34 a of the movable scroll 34 and the inner wall of the fixed scroll 36. Further, when the opening end 60a of the communication path 60 and the opening end 71a that is the oil supply inlet of the oil injection communication path 71 are combined, the lubricating oil passes from the communication path 60 through the oil injection communication path 71 and is an opening that is the oil supply outlet. It is supplied from the end 71b to the space between the spiral wraps 34a and 36a forming the outer peripheral compression chamber 39.

Accordingly, since the lubricating oil is intermittently supplied to the compression chamber 39 by the revolving orbiting motion of the movable scroll 34, the necessary amount of lubricating oil is supplied to the compression chamber 39 when the movable scroll 34 rotates at high speed. It is possible to improve the sealing performance of 39 and improve the compression efficiency.
Further, since the lubricating oil is intermittently supplied to the compression chamber 39 once for each rotation of the movable scroll 34, the minimum amount of lubricating oil is supplied to the compression chamber 39 even when the movable scroll 34 rotates at a low speed. Therefore, it is possible to prevent the lubricating oil from being excessively supplied to the compression chamber 39, so that the volumetric efficiency of the refrigerant can be improved.

Further, since the space between the spiral wraps 34a, 36a of the movable scroll 34 and the fixed scroll 36 forming the compression chamber 39 is sealed with the lubricating oil supplied intermittently, the sealing performance of the entire compression chamber 39 is improved. It is possible to improve the compression efficiency. Moreover, since lubricating oil is supplied between walls, the oil film of a sliding part becomes thick and wear of a sliding part can be prevented.
Since the lubricating oil is supplied at a timing immediately before the compression chamber 39 is formed, the lubricating oil is supplied to the sliding portion of the formed compression chamber 39, and the sealing performance of the compression chamber 39 can be improved. it can.

  Further, when the opening end 62 a of the communication path 62 provided in the movable scroll 34 and the opening end 80 a that is the oil supply inlet of the oil injection communication path 80 are combined, the lubricating oil is passed from the communication path 62 to the oil injection communication path 80. And is supplied between the walls of the spiral wraps 34a and 36a of the movable scroll 34 and the fixed scroll 36 from the opening end 80b in the compression chamber 39 formed inside the inner peripheral portion. Further, when the opening end 62a of the communication passage 62 and the opening end 81a that is the oil supply inlet of the oil injection communication passage 81 are combined, the lubricating oil passes from the communication passage 62 through the oil injection communication passage 81, and outside the inner peripheral portion. Is supplied from the opening end 81b of the compression chamber 39 formed between the walls of the spiral wraps 34a and 36a of the movable scroll 34 and the fixed scroll 36 to each other.

As a result, the lubricating oil is also supplied to the compression chamber 39 on the high-pressure side, so that leakage of the refrigerant in the compression chamber 39 on the high-pressure side can be prevented and the sealing performance can be improved, and the compression efficiency can be improved. is there.
Further, by supplying lubricating oil to the compression chamber 39 on the intermediate pressure side and the high pressure side, respectively, the entire wall side of the sliding portion can be sealed, thereby improving the sealing performance of the entire compression chamber 39. It is possible to further improve the compression efficiency.

The description of one embodiment of the present invention is finished above, but the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.
For example, in the above embodiment, the opening ends 70a, 71a, 80a, 81a serving as the oil supply inlets of the oil injection communication paths 70, 71, 80, 81 are provided at predetermined positions on the end plate surface 36c of the fixed scroll 36. If the lubricating oil can be supplied immediately before the chamber 39 is formed, it may be opened at any position on the end plate surface 36c.

  In the above-described embodiment, the hermetic scroll compressor is described. However, the present invention is not limited to this, and the present invention can be applied to various scroll-type fluid machines such as various compressors or expanders.

It is a longitudinal section of a scroll type fluid machine concerning an embodiment of the present invention. It is a cross-sectional view which follows the AA line of FIG. It is a longitudinal cross-sectional view which follows the BB line of FIG. It is a longitudinal cross-sectional view which follows the CC line of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Scroll compressor 2 Housing 16 Rotating shaft 26 Oil supply path 28 Scroll unit 34 Movable scroll 34a Spiral wrap 34c End plate surface 36 Fixed scroll 36a Spiral wrap 36c End plate surface 38 Boss part 60, 62 Communication path 60a, 62a Open end 70, 71, 80, 81 Oil injection communication path 70a, 71a, 80a, 81a, 70b, 71b, 80b, 81b Open end

Claims (3)

A rotating shaft extending through the container and rotatably supported by the container;
A fixed scroll, and a movable scroll that revolves around the axis of the fixed scroll, and is provided between the movable scroll and the spiral scroll of the fixed scroll by the revolving orbiting movement of the movable scroll. A scroll unit for performing a series of processes of suction, compression and discharge of the working fluid while reducing the volume of the compression chamber formed in
A spindle frame including a bearing housed in the container and supporting the rotating shaft;
A back pressure chamber formed between the upper surface of the main spindle frame and the end plate surface of the movable scroll, and filled with a lubricating oil pressurized at a higher pressure on the inner peripheral side than on the outer peripheral side;
A boss provided so as to protrude from the inner peripheral side of the movable scroll;
A first communication path extending through the movable scroll, having one end opened to the back pressure chamber and the other end opened to the end plate surface of the movable scroll;
A second communication path extending through the movable scroll, having one end opened in the boss portion, and the other end opened in the end plate surface of the movable scroll;
When extending through the fixed scroll, one end has an open end on the end plate surface of the fixed scroll, and the open end is aligned with the open end at the upper end of the first or second communication path by the revolving orbiting motion of the movable scroll An oil injection communication passage that intermittently supplies lubricating oil from the opening end provided on the wall side of the spiral wrap of the fixed scroll,
The scroll type fluid machine is characterized in that the oil injection communication passage supplies lubricating oil to the compression chamber once every time the movable scroll makes one revolution revolution.   2. The oil injection communication path according to claim 1, wherein an opening end that supplies lubricating oil immediately before the compression chamber is formed is disposed at a predetermined position on the end plate surface of the fixed scroll. The scroll type fluid machine as described.   The oil injection communication passage has an open end at a predetermined position on both wall sides of the spiral wrap standing from the fixed scroll in the compression chamber formed in the outer peripheral portion of each spiral wrap of the movable scroll and the fixed scroll. A first oil injection communication path; and a second oil injection communication path having open ends at predetermined positions on both wall sides of the spiral wrap standing from the fixed scroll formed on the inner periphery of each spiral wrap. The scroll type fluid machine according to claim 1 or 2, wherein

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