JP3045910B2 - Scroll fluid machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scroll fluid machine used for, for example, an air conditioner or a refrigeration system.

[0002]

2. Description of the Related Art FIG. 6 is a diagram showing one embodiment of a conventional scroll compressor. In the figure, 1 is a fixed scroll,
2 is an orbiting scroll, 3 is a crankshaft, 4 is a compression chamber, 5
Is a frame, 6 is an Oldham coupling for swinging the orbiting scroll 2, 7 is a motor / rotor, 8 is a motor / stator, 9 is a first balancer, 10 is a second balancer, 11 is a shell, 12 is a suction pipe, 13 is a discharge pipe, 14 is an air gap, 15 is a suction port, and 16 is an oil reservoir. The orbiting scroll 2 is fitted to the fixed scroll 1 and is connected to the crankshaft 3 via a bearing. The crankshaft 3 is fitted to the frame 5 and the frame 5 and the fixed scroll 1
Are connected by bolts or the like (not shown), and an Oldham coupling 6 is located between the orbiting scroll 2 and the frame 5.
Further, a motor / rotor 7 is connected to the crankshaft 3 by press fitting or the like, and a first balancer 9,
The second balancer 10 is fixed by screws or the like (not shown). The frame 5 and the motor / stator 8 are fixed to the shell 11 by press fitting or the like.

Next, the operation will be described. First, when the motor / stator 8 is energized, a rotational torque is generated in the motor / rotor 7 to rotate the crankshaft 3. Then, the orbiting scroll 2 starts turning, but since the rotation is prevented by the Oldham coupling 6, the fixed scroll 1 and the orbiting scroll 2 compress the working fluid. Here, the orbiting scroll 2 makes an eccentric orbital motion, and its static and dynamic balance is performed by the first and second balances 9 and 10. When the compressor is operated in this manner, the gas of the working fluid is sucked from the suction pipe 12 as shown by the solid arrow in FIG.
After passing through 5, the air is sucked into the compression chamber 4 through the suction section 4a of the compression chamber 4, where it is compressed and discharged from the discharge pipe 13. As shown by a dotted arrow in FIG. 6, oil is centrifugally applied to the journal sliding portions 2a, 3b, 3c and the thrust sliding portion 2b from the eccentric hole 3a in the crankshaft 3 whose tip is attached to the oil reservoir 16. And the oil leaking from the sliding portion returns to the oil reservoir 16 by gravity.

[0004]

In the above-described scroll compressor, the oil leaked from the sliding portions 2a, 3b, 3c, 2b does not return to the oil reservoir 16 due to the inhaled gas, and the oil does not return to the compression chamber 4. To the discharge pipe 1
From 3 is discharged to the outside of the compressor. Therefore, the oil in the oil sump 16 was depleted, and the sliding parts 2a, 3b, 2c, 2b suffered seizure damage. Also, an expensive oil separator was required to prevent accidents due to oil rising. Further, when the suction gas is directly sucked into the compression chamber 4, the oil is not sucked, but the motor is not cooled.

The present invention has been made in order to solve the above-mentioned problems, and can improve the reliability by reducing the oil rising and eliminating the peripheral devices such as the oil separator. The aim is to reduce costs.

[0006]

According to the present invention, there is provided a compression unit comprising a fixed scroll and an orbiting scroll, each having a spiral, and the spirals are combined with each other to form a compression chamber between the spirals. A motor that drives the orbiting scroll through a crankshaft, a shell that houses the compression section and the motor, a frame that partitions the inside of the shell into the compression section and the motor chamber, and suction into the upper space of the motor chamber. A suction pipe for supplying gas and a first suction port which is provided on the frame and is located near the inner wall surface of the shell on a side symmetrical to the suction pipe with respect to the crankshaft and communicates the compression section with the motor chamber; And the above-mentioned frame
And the first suction port communicates with the compression section in the axial direction.
Provide a recess that opens to the opposite side, and inward from the inner wall side of the shell.
A partition plate extending toward
Cover the inner wall side, and inside the shell,
And a second suction port located inwardly .

Further, the second suction port peripheral edge portion which is provided in the partition plate, in which a flange portion that is collision set toward the upstream side of the gas flow flowing through the inlet.

[0008] Further, an oil drain pipe for guiding lubricating oil lubricating each bearing portion between the orbiting scroll and the crankshaft to an oil reservoir at a lower portion of the motor chamber and a partition plate are fixed and integrally formed.

Further, located in the motor chamber upper space, and the oil between the shell within the opening of the first suction port and the suction pipe
Is provided.

One end is inserted into an oil drain hole formed in the frame, and the other end is located in a space between the motor stator and the inner wall surface of the shell or in a lower space of the motor chamber through the upper space of the motor chamber. A drain pipe is provided , and the lubricating oil lubricating each bearing portion is returned to the oil reservoir at the lower part of the shell via the drain pipe, and the drain pipe is fixed to the partition plate.
This is an integrated structure .

Further, the inner wall surface of the shell which is symmetrical with the suction pipe.
A compression unit and a motor chamber are provided near the frame
A first suction port communicating the
1 and open in the axial direction on the opposite side to the compression section.
A recessed part to be opened from the inner wall side of the shell
By the extending partition plate, the inner wall surface side of the recess above the shell
And a second suction port formed inside the shell,
Provided in the space portion surrounded by the upper coil end portion of the over data of the motor stator, in which a balancer upper end of its is coordinated so as to be positioned below the upper coil end top end.

The balancer is formed in an umbrella shape so as to cover the rotation locus of the balancer from above, and the outer peripheral edge thereof is bent downward to provide a flange, and the lower end of the flange is lower than the upper end of the upper coil end. Is provided with a balancer cover formed so as to be located at a position.

[0013]

In the scroll fluid machine configured as described above, since the second suction port is provided at a position closer to the crankshaft than the first suction port, the motor chamber in the shell is provided. In the upper part, the intake gas can be taken into the compression chamber in the order of the second intake port and the first intake port from a portion where the oil density in the intake gas that makes a swirling motion around the crankshaft is low, and the oil rises Can be reduced.

Further, since the peripheral portion of the second suction port provided on the partition plate is provided with a flange protruding toward the upstream side of the gas flow flowing through the suction port, the operation is performed. The suction gas swirling flow generated in the upper part of the motor chamber collides with the flange portion once formed without being sucked from the second suction port as it is, so that the oil mixed in the suction gas swirling flow is separated. Then, the amount of oil sucked into the compression chamber through the second suction port is reduced, so that the rise of oil can be reduced.

[0015] Also, between the orbiting scroll and the crankshaft,
By fixing the oil drain pipe and the partition plate that return the lubricating oil that lubricated each bearing to the oil sump at the bottom of the motor chamber,
A scroll fluid machine with good assemblability can be obtained.

Further, the first motor is located in the upper space of the motor room,
Of oil that is located between the suction port of the
By providing the separating means , oil mixed in the suction gas is separated by the demister and the amount of the oil sucked into the compression chamber is reduced, so that the rise of oil can be reduced.

One end is fitted into an oil drain hole formed in the frame, and the other end passes through the upper space of the motor chamber and is located in the gap between the motor stator and the inner wall surface of the shell or the lower space of the motor chamber. the oil pipe is provided, to Kaee the oil reservoir Me a lower shell lubricating oil to the bearings were lubricated through the oil discharge pipe
And the oil drain pipe is fixed to the partition plate to form an integral structure, so that the amount of oil taken out in the space in the shell can be reduced , and the partition plate also serves as a fixing plate for the oil drain pipe.
Ru can be so.

Also, a second suction formed inside the shell
The mouth and its upper end are located below the upper end of the upper coil end.
Since a balancer arranged to so that a portion of the lubricating oil after lubricating the bearings to be discharged to the motors chamber top,
The rotational movement of the balancer, without being blown directly motor chamber top, once to hit the inner wall surface of the stator upper coil end, be oil separation at the site, the second suction port
Oil density is that Do not dilute.

The rotation locus of the balancer is covered from above.
Since the lower end of the flange portion of the balancer cover formed in an umbrella shape is configured to be located below the upper end of the upper coil end, oil that is blown off by the balancer and hit by the inner wall surface of the balancer cover cuts off the inner wall surface of the balancer cover. Even if it moves downward by its own weight and falls from the lower end surface and flies outward again, the oil is cut off by the inner wall surface of the motor coil end, so that oil rising can be reduced.

[0020]

[Embodiment 1] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a longitudinal sectional view showing one embodiment of claims 1, 2 and 3, FIG. 2 is a longitudinal sectional view showing one embodiment of claim 2, and FIG.
FIG. 4 is a perspective view showing a main part of one embodiment of claim 3, and FIG. 5 is a vertical sectional view showing one embodiment of claims 5, 6, and 7. In the drawing, the same or corresponding parts as those of the scroll compressor of the conventional example shown in FIG. 6 are denoted by the same reference numerals, and redundant description will be omitted. In FIG. 1, a crankshaft 3 for driving the orbiting scroll 2 has a first bearing 3 b provided on a first frame 5 and a second bearing 3 c provided on a second frame 4 on both sides of a motor 8. , And are rotatably supported in the radial direction. Also the crankshaft 3
The motor rotor 7 and the first balancer 104 are shrink-fitted, and the second balancer 10 is caulked below the motor rotor 7. At the lower end of the crankshaft 3, a positive displacement pump 3a is mounted.
The lubricating oil accumulated in the oil sump 16 at the bottom of 1 is pumped up. The first frame 5 has a first suction port 15 provided with a shell 11.
It is open near the inner wall surface and at a position sandwiched between two ribs 5a and 5b formed on the first frame 5 shown in FIG. 4 (the first frame sandwiched between the ribs 5a and 5b). 5
Part corresponds to a concave part that opens in the axial direction on the opposite side to the compressed part.
Do) . As shown in FIG. 4, the first frame 5 is tightened with bolts 108 so that the outer peripheral side is in close contact with the inner wall surface of the shell 11 and the inner peripheral side is a clearance 103a between the first frame boss 5c (hereinafter referred to as a second suction port). A fan-shaped partition plate 103 attached so as to form a mouth is provided. And a partition plate 103 forming the second suction port 103a.
The inner peripheral portion 103c is configured to be closer to the crankshaft 3 than the inner wall surface 15a of the first suction port 15 described above.

Embodiment 2 FIG. Further, as described above, the flange portion 103b formed on the periphery of the suction port of the partition plate 103 forming the second suction port 103a toward the upstream side of the gas flow flowing through the suction port.
Is formed.

Embodiment 3 FIG. Further, the first frame 5 is provided with an oil drain hole 112 for returning the oil lubricating the bearings 2a and 2b to the oil reservoir 16, and as shown in FIG. The distal end of the oil drain pipe 109 integrally attached to the plate 103 is fitted into the oil drain hole 112 and the partition plate 103 is fixed to the two ribs 5a and 5b of the first frame with bolts 108, so that the oil is drained from the partition plate 103. The structure is such that the oil pipe 109 and the oil pipe 109 are set at the same time.

Embodiment 4 FIG. In the drawing, the solid arrows indicate the flow of the suction gas, and after flowing into the shell 11 from the suction pipe 12, one of the two passes through the motor upper space 101 to cool the motor upper coil end 8a, and then the second suction port 103a, reaches the compression chamber 4 through the first suction port 15, passes through the clearance 113 between the motor side surface and the inner wall surface of the shell, reaches the motor lower space 102, cools the motor lower coil end 8b, and then returns to the motor. After returning to the motor upper space 101 through the clearance 113 between the side surface and the inner wall of the shell 11, it reaches the compression chamber 4 where it has merged with the gas flow described above. Also, broken arrows indicate the flow of oil, which is pumped up from the oil sump 16 by the positive displacement pump 3a and lubricates the bearings 2a, 2b, 3b, 3c described above. Most of the discharged oil is dropped by its own weight and reaches the oil sump 16 at the lower part of the shell 11, but part of the oil is taken up by the flow of the suction gas flowing through the shell 11 and is compressed 4 together with the suction gas. Reach. In FIG. 3, reference numeral 110 denotes a demister (filter) as oil separating means formed by a wire mesh that divides the motor upper space 101 into upper and lower portions.
The suction pipe 12 is provided below the demister, the first suction port 15 of the first frame is provided above the demister, and the outer peripheral portion is attached so as to be in close contact with the inner wall surface of the shell 11. I have.

Embodiment 5 FIG. 5, 105 by extending the oil discharge tube 109 shown in FIG. 1 the click <br/> rank axis direction, the motor stator 8 and the shell 1
1 is an oil drain pipe provided so that a pipe opening is located in the motor lower space 102 through a side surface gap 113 portion of the oil drain pipe.

Embodiment 6 FIG. Reference numeral 104 denotes a first balancer whose upper end surface 104a is set to be lower than the upper end surface 8d of the motor upper coil end 8a.

Embodiment 7 FIG. Reference numeral 106 denotes a balancer cover, which is formed in an umbrella shape so as to cover the first balancer 104 , and is attached to the boss portion 5c of the first frame 5 by press fitting. Also, 106
a is a flange formed by bending the outer peripheral edge of the umbrella-shaped balancer cover 106 downward, and the lower end thereof is lower than the upper end surface 8d of the motor upper coil end. It is set as follows.

Next, the operation of the scroll fluid machine of the present invention will be described. The behavior of the suction gas and the lubricating oil in the shell 11 during the operation of the scroll fluid machine is as described with reference to the solid line and the dashed arrow in the figure and the above-mentioned contents. Since the first balancer 104 rotates together with the rotation of the first rotation, a swirling gas flow is generated in the space. As described above, the mist-like oil is mixed in the suction gas flowing through the shell 11, but due to the centrifugal force due to this swirling flow, heavy oil particles are generated around the crankshaft 3. And a gas having a high oil concentration is generated near the inner wall surface of the shell 11. The gas having a high oil concentration is sucked in the conventional first suction port 15, but in this embodiment, the gas is located on the upstream side of the conventional first suction port 15 and the distance from the crankshaft 3. Is provided at a portion at a shorter distance, that is, at a portion where the oil concentration is low, and the suction gas in the motor upper space 101 passes through the second suction port 103a and the first suction port 15 in this order. With this configuration, the amount of oil taken into the compression chamber 4 is reduced, and the rise of oil can be kept low.

Also, by providing the suction port on the inner peripheral side,
The gas existing on the outer side also has a flow from the outer side to the inner side, and a part of the gas with a high oil concentration flows, but this situation is partitioned as shown in FIG. Board 10
The peripheral portion of the second suction port 103a which is formed by 3, by forming a flange portion 103b which is collision set toward the upstream side of the gas flow flowing through the inlet 103a, came flowing by swirling flow Oil separation can be performed by changing the gas flow direction of the outer peripheral portion once, and the effect of reducing oil rise is great.

As shown in FIG. 3, the first suction port 15 is provided in the motor upper space 101 inside the compressor shell.
And a demister 110 having a wire mesh structure as a means for separating oil discharged from the suction pipe 12 and the bearing end 3b1 is provided. When the refrigerant gas flows into the space 101a on the first suction port 15 side after passing through, the oil is separated in the demister 110, and the oil in the suction gas flowing into the compression chamber 4 from the first suction port 15 is removed. The amount can be greatly reduced and the oil rise can be kept low.

The oil drain pipe 109 shown in FIG. 4 is directly fixed to the partition plate 103, and the partition plate 103 has a structure also serving as the oil drain pipe fixing plate. And assembly time can be reduced.

In FIG. 5, the flow of the suction gas is the same as in FIG. As for the lubricating oil, the lower oil reservoir 16 of the shell 11
The bearing 2a is pumped by the positive displacement pump 3a
The oil that has been lubricated passes through an oil drain pipe 105 whose outlet side is open to the motor lower space 102, is discharged to the motor lower space 102, and is returned to the oil reservoir 16 by its own weight. In the present invention, the outlet end of the oil drain pipe is open to the motor lower space 102, and the amount of oil taken out by the suction gas flow factor to the motor lower space 102 and the motor upper space 101 is almost negligible. The amount of oil taken into the compression chamber 4 can be reduced.

The oil lubricating the bearing 3b is discharged to the upper portion of the first balancer 104 . The discharged oil moves outward from the crankshaft along the surface of the first balancer upper end surface 104a by centrifugal force, and then scatters from the balancer upper end surface 104a . At this time, the splashed oil becomes a mist and mixes into the suction gas. However, the first balancer upper end surface 104a is located below the motor upper coil end upper surface 8d and the motor upper coil end space 1
07, the first balancer
The mist-like oil blown by centrifugal force from 104
It does not collide with the inner wall surface 8c of the motor upper coil end 8a, is separated from the suction gas, and does not directly mix into the suction gas. For this reason, the amount of oil taken in from the first suction port 15 can be reduced, and oil rising can be reduced.

Also, by configuring the lower end of the flange portion 106a of the balancer cover 106 to be located below the upper end 8d of the upper coil end, the first balancer 10
4. Even if the upper end is located higher than the upper end 8d of the upper coil end, oil scattered outward from the first balancer upper end surface 104a can be prevented from being scattered to the motor upper space 101 by the balancer cover 106. Further, even if the oil adhering to the inner surface of the balancer cover 106 falls again by its own weight and is blown toward the motor upper space 101 by the swirling flow of gas generated by the first balancer 104 , the oil on the motor upper coil end 8a Inner wall surface 8c
Since it collides with the gas, it does not directly enter the intake gas. For this reason, the amount of oil taken in from the first suction port 15 can be reduced, and oil rising can be reduced.

[0034]

Since the present invention is configured as described above, it has the following effects.

With respect to the crankshaft, it is symmetrical with the suction pipe.
Located on the frame near the inner wall surface of the shell,
A first suction port for communicating the motor unit with the motor unit;
The frame communicates with the first suction port, and the pressure
Provide a recess that opens on the opposite side of the shrinking part, and
A partition plate extending inward from
Cover the inner wall surface of the shell, and place the first suction
Since the second inlet located inside the inlet was formed,
The intake gas can be taken into the compression chamber from a portion with a low oil density distributed in the upper part of the motor chamber, and the oil rise can be reduced.

Further, a flange is formed on the periphery of the second suction port provided on the partition plate so as to protrude toward the upstream side of the gas flow flowing through the suction port. The gas swirling flow generated in the upper part of the motor chamber collides with the flange portion once without being sucked as it is, so that the oil mixed in the suction gas swirling flow is separated and compressed through the second suction port. The amount of oil sucked into the chamber is reduced, and oil rising can be reduced.

Further, the oil drain pipe for guiding the lubricating oil lubricating the bearings between the orbiting scroll and the crankshaft to the oil sump at the lower part of the motor chamber and the partition plate are fixed to form an integral structure, so that assemblability is improved. A good scroll fluid machine can be obtained.

The oil separating means is located in the upper space of the motor chamber and provided between the first suction port and the opening in the shell of the suction pipe, so that the oil is mixed in the suction gas. Oil is the above oil
The amount of oil separated by the separating means and sucked into the compression chamber is reduced, and the rise of oil can be reduced.

One end is inserted into an oil drain hole formed in the frame, and the other end passes through the upper space of the motor chamber, and the oil drain pipe located in the gap between the motor stator and the inner wall surface of the shell or the lower space of the motor chamber. provided, the lubricating oil of the bearings were lubricated and configuration Kayes oil sump of the shell bottom through the oil discharge pipe
At the same time, the oil drain pipe was fixed to the partition plate to form an integral structure
The amount of oil taken out in the space inside the shell can be reduced
The partition plate can also serve as the fixed plate for the oil drain pipe,
The standing of good scroll compressor obtained can Rukoto.

In the vicinity of the inner wall surface of the shell which is symmetrical with the suction pipe
Position and provided on the frame to connect the compression section and the motor chamber.
A first suction port through which the first suction port passes and the first suction port.
Communicates with the inlet and opens in the axial direction on the side opposite to the compression section
Provide a recess and extend inward from the inner wall side of the shell
A partition plate covers the shell inner wall surface side of the recess.
Technique, a second intake port formed in the shell interior, provided in a space portion surrounded by the upper coil end portion of <br/> motor stator of the motor, located below the upper end of that is from the upper coil end top end since a arranged so that the balancer, part of the lubricating oil after lubricating the bearings to be discharged into the motor chamber top, by the rotational motion of the balancer, without being blown directly motor chamber top, Once it hits the inner wall of the upper stator coil end, oil is separated at that location,
The second inlet has a low oil density, and the oil density is low.
Position from the suction gas can be a taken into the compression chamber, cut the oil up in low reduced.

Further, the balancer is formed in an umbrella shape so as to cover the rotation locus portion from above, and the outer peripheral edge is bent downward to provide a flange portion, and the lower end of the flange portion is lower than the upper end of the upper coil end. When the balancer cover is formed so as to be located at the position, the oil that is blown off by the balancer and hit against the inner wall surface of the balancer cover moves down the inner wall surface by its own weight and drops from the lower end of the flange portion. However, even if it scatters outward again, the oil is shut off by the inner wall surface of the upper coil end, so that oil rising can be reduced.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a scroll fluid machine according to Embodiment 1 of the present invention.

FIG. 2 is a sectional view of a main part of a scroll fluid machine according to a second embodiment of the present invention.

FIG. 3 is a sectional view of a main part of a scroll fluid machine according to Embodiment 4 of the present invention.

FIG. 4 is an exploded perspective view showing a main part of a scroll fluid machine according to Embodiment 3 of the present invention.

FIG. 5 is a vertical sectional view showing a scroll fluid machine according to Embodiment 5 of the present invention.

FIG. 6 is a longitudinal sectional view showing a conventional scroll fluid machine.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Fixed scroll 2 Oscillating scroll 3 Crankshaft 4 Compression chamber 5 Frame 7 Motor rotor 8 Motor stator 8a, 8b Motor stator coil end 8d Upper coil end upper end 11 Shell 12 Suction pipe 15 First suction port 16 Oil reservoir 101 Motor chamber Upper space 102 Motor chamber lower space 103 Partition plate 103a Second suction port 103b Flange part (partition plate) 104, 114 Balancer 105, 109 Oil drain pipe 106 Balancer cover 106a Flange part (balancer cover) 110 Demister (oil separating means) 112 Oil drain hole

──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-4-350383 (JP, A) JP-A-4-100089 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) F04C 18/02 311

Claims (7)

(57) [Claims] A compression section comprising a fixed scroll and an orbiting scroll each having a spiral, wherein the spirals are combined with each other to form a compression chamber between the spirals;
A motor for driving the orbiting scroll via a crankshaft, a shell for accommodating the compression section and the motor, a frame for partitioning the inside of the shell into the compression section and the motor chamber, and supplying a suction gas to a space above the motor chamber. A first suction port provided in the frame near the inner wall surface of the shell that is symmetrical to the suction pipe with respect to the suction pipe and the crankshaft and communicating the compression section and the motor chamber ;
The frame communicates with the first suction port and is axially
A concave portion is provided on the opposite side to the compression portion, and the inner wall of the shell is provided.
The above-mentioned concave portion is formed by a partition plate extending inward from the side.
Cover the inner wall surface of the shell, and place the first
Providing a second inlet located inward from the inlet
Due to the above, the above-mentioned suction gas flows into the above-mentioned suction pipe and the above-mentioned motor chamber.
Through the space, the second suction port and the first suction port,
A scroll fluid machine wherein a flow passage leading to a compression chamber is formed . 2. A peripheral part of a second suction port provided on a partition plate,
2. The scroll fluid machine according to claim 1, further comprising a flange protruding toward an upstream side of a gas flow flowing through the suction port. 3. An oil drain pipe for guiding lubricating oil, which lubricates each bearing portion between the orbiting scroll and the crankshaft, to an oil sump at a lower portion of the motor chamber and a partition plate are fixed and integrally formed. Item 2. The scroll fluid machine according to Item 1. 4. A compression unit comprising a fixed scroll and an orbiting scroll each having a spiral, and the spirals are combined with each other to form a compression chamber between the spirals.
A motor for driving the orbiting scroll via a crankshaft, a shell for accommodating the compression section and the motor, a frame for partitioning the inside of the shell into the compression section and the motor chamber, and supplying a suction gas to a space above the motor chamber. A first suction port that is provided on the frame and that is located near the inner wall surface of the shell that is symmetrical to the suction pipe with respect to the suction pipe and the crankshaft, and that communicates the compression section with the motor chamber; After being supplied through the suction pipe and cooling the motor,
In a scroll fluid machine that forms a flow passage for suction gas guided to a suction portion of the compression chamber via the first suction port, the scroll fluid machine is located in an upper space of the motor chamber, and is connected to the first suction port and the suction port. A scroll fluid machine comprising an oil separating means disposed between openings in a shell of a pipe. 5. A compression section comprising a fixed scroll and an orbiting scroll, each having a spiral, and the spirals are combined with each other to form a compression chamber between the spirals.
When, a motor for driving the orbiting scroll via the crankshaft, shell housing the compression section and the motor
When suction pipe supplies a frame for partitioning the inside this shell and the compression section and the motor chamber, a suction gas in the motor chamber
And the compression unit and the motor provided on the frame.
The suction port that communicates with the chamber and one end are drilled in the frame
And the other end passes through the upper space of the motor room.
The gap between the motor stator and the inner wall surface of the shell, or
Located in the lower space of the motor room, each shaft is
Scroll with oil drain pipe for returning lubricating oil lubricated to receiving part
In the fluid machine, the suction hole is compressed in the axial direction.
The recess provided on the frame, which opens on the opposite side of the
A partition plate extending inward from the inner wall of the well
Formed by closing the side opening, and
The scroll fluid machine , wherein the oil drain pipe is fixed to the partition plate to form an integral structure . 6. A compression section comprising a fixed scroll and an orbiting scroll, each having a spiral, and the spirals are combined with each other to form a compression chamber between the spirals.
When, a motor for driving the orbiting scroll via the crankshaft, shell housing the compression section and the motor
When suction pipe supplies a frame for partitioning the inside this shell and the compression section and the motor chamber, a suction gas in the motor chamber
A first suction port provided in the frame near the inner wall surface of the shell on the side symmetrical to the suction pipe with respect to the crankshaft, and communicating the compression section with the motor chamber ;
The frame communicates with the first suction port and is axially
A concave portion is provided on the opposite side to the compression portion, and the inner wall of the shell is provided.
The above-mentioned concave portion is formed by a partition plate extending inward from the side.
The inner wall surface of the shell is closed and formed inside the shell.
A second suction port, and a space portion surrounded by an upper coil end portion of the motor stator of the motor,
Scroll fluid machine characterized in that the upper end thereof and a balancer arranged so as to be positioned below the upper coil end top end. 7. A compression section comprising a fixed scroll and an orbiting scroll, each having a spiral, and the spirals are combined with each other to form a compression chamber between the spirals.
Motor for driving the orbiting scroll via the crankshaft is fixed to the rotating portion of the crank shaft or the like, the balancer taking balance, the compression section and the shell that houses the motor, the compression section and the motor in the shell A frame for partitioning into a chamber, a suction pipe for supplying suction gas to the upper part of the motor chamber, and the crankshaft;
A first suction port that communicates the compression section with the motor chamber, which is supplied through the suction pipe, cools the motor, and then sucks the compression chamber through the first suction port; In a scroll fluid machine that forms a flow path for an intake gas guided to a portion, an umbrella shape is formed so as to cover the rotation trajectory portion of the balancer from above, and a flange portion is provided by bending an outer peripheral edge of the umbrella shape downward. And a balancer cover formed so that the lower end of the flange portion is located below the upper end of the upper coil end.