JPH1182336A - Scroll compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent oil from mixing in the fluid to be compressed and to increase the compression efficiency, by supplying the oil to a part which needs the lubrication, by mounting the lubricating oil storing part in a scroll compressor. SOLUTION: In a scroll compressor comprising a scroll compressing part 50, a driving shaft 55, an inlet chamber 80 and a discharge chamber 85 in a casing 40, the driving shaft 55 is transversely placed so that it is extended almost in a horizontal direction, a casing main body 40a is formed in such manner that it surrounds the driving shaft 55, the scroll compressing part 50, the inlet chamber 80 and the discharge chamber 85, and an oil pan 40b for storing the lubricating oil, is projected downward from the casing main body 40a.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scroll compressor used for an air conditioner or the like, and more particularly to a structure of a lubrication system provided in the compressor.

[0002]

2. Description of the Related Art Conventionally, as disclosed in, for example, Japanese Patent Application Laid-Open No. 9-14163, a scroll compressor having an orbiting scroll and a fixed scroll, a drive shaft for driving the orbiting scroll, A compressor body having a bearing mounting portion for supporting the drive shaft via a bearing is accommodated, and a lower portion of a discharge side space formed between the compressor body and the compressor outer shell is used as an oil sump. There is known a scroll compressor in which oil stored in a compressor is supplied to a bearing portion for a drive shaft, a scroll compression section, and the like.

In this scroll compressor, the drive shaft is rotationally driven by an external engine or the like via a transmission means, and the orbiting scroll of the scroll compression section is turned in accordance therewith, whereby the fluid to be compressed such as refrigerant is compressed. In such a driving state, the bearing portion, the scroll compression portion, and the like are lubricated by the oil supplied from the oil reservoir to each portion. The lubricated oil is returned to the oil reservoir.

[0004]

In the above-mentioned conventional scroll compressor, the outer shell of the compressor is formed in a cylindrical shape simply surrounding the scroll compressor, the drive shaft, the compressor body, and the like. The lower part of the discharge side space in the inside is an oil reservoir, and the oil accumulates to a height position corresponding to the vicinity of the center of the drive shaft and the scroll compression part. For this reason, the oil in the oil sump is agitated under the influence of the flow of the fluid to be compressed, the rotation of the drive shaft, or the like, or the oil surface resonates with the vibration transmitted from the scroll compression part or the like, and the oil surface swings greatly. In addition, a large amount of oil is easily mixed into the fluid to be compressed in the discharge side space, and the oil is not easily separated from the fluid to be compressed.

[0005] When the amount of oil mixed into the fluid to be compressed increases, the discharge amount of the fluid to be compressed decreases correspondingly, and there is a problem that the efficiency of the compressor decreases.

In view of such circumstances, the present invention suppresses the inflow of oil into a fluid to be compressed while storing oil for lubrication and enabling oil to be supplied to parts requiring lubrication. It is an object of the present invention to provide a scroll compressor that can increase the efficiency of the scroll compressor.

[0007]

In order to achieve the above object, the present invention provides a scroll compression section in a casing,
A scroll provided with a drive shaft for driving the scroll compressor, a suction chamber for sucking a fluid to be compressed according to the drive of the scroll compressor, and a discharge chamber for discharging a fluid to be compressed according to the drive of the scroll compressor. In the compressor, the drive shaft is set to extend horizontally in a substantially horizontal direction, and a casing main body is formed so as to surround the drive shaft, the scroll compression unit, the suction chamber and the discharge chamber, and the oil pan for storing lubricating oil is formed as described above. It is provided so as to protrude downward from the casing body.

According to this structure, the oil is stored in the oil pan separated from the scroll compression portion, the drive shaft, the suction chamber, and the discharge chamber in the casing body, so that the oil is mixed into the fluid to be compressed. Is suppressed, and the efficiency of compression is increased.

In the present invention, at least one of the suction chamber side and the discharge chamber side in the casing body is provided with an oil separating section for separating oil from the fluid to be compressed, and the oil separating section is communicated with the oil pan. For example, in addition to suppressing the mixing of oil into the fluid to be compressed as described above, the oil already contained in the fluid to be compressed is separated by the oil separation unit, so that the oil into the fluid to be compressed is reduced. Is further reduced.

Further, a partition is provided between the casing main body and the oil pan, an oil pump is disposed in the casing main body, an oil passage for guiding oil from the oil pan to the oil pump is provided in the casing, and an oil return to the partition is provided. The effect of suppressing the mixing of oil into the fluid to be compressed can be enhanced if the holes are formed.

Further, if the oil pan is constituted by a portion connected to the casing body and an oil pan cover detachably connected to this portion, the oil pan cover can be different in size. By replacing the oil pan, the capacity of the oil pan can be easily changed, and the amount of oil can be adjusted depending on the model.

[0012]

Embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a schematic diagram of an air conditioner shown as an example of an apparatus using the scroll compressor of the present invention.
The air conditioner includes a scroll compressor 1 driven by a water-cooled gas engine 2, a refrigerant circuit 15 incorporating the compressor 1, and a cooling water circuit 30 for cooling the engine.

The engine 2 and the compressor 1 are connected by mounting a belt 4c over a pulley 4a attached to the output shaft 3 of the engine 2 and a pulley 4b provided on the input side of the compressor 1. ing.

An intake pipe 5 is connected to the engine 2.
An air cleaner 6, a mixer 7, and a throttle valve 8 are provided in the intake pipe 5. A fuel supply pipe 9 is connected to the mixer 7, and an electromagnetic valve 10, a zero governor 11, and a fuel control valve 12 are interposed in the fuel supply pipe 9. Further, an exhaust pipe 13 is connected to the engine 2.
An exhaust gas heat exchanger 14 is interposed.

The refrigerant circuit 15 circulates the refrigerant discharged from the compressor 1 through the condenser, the expansion valve and the evaporator so as to return to the compressor 1. In the example shown in the figure, an air conditioner capable of cooling and heating is used. In order to configure, a four-way valve 16 for switching the refrigerant circulation path is provided, and an outdoor heat exchanger 17, an electronic expansion valve 18, and an indoor heat exchanger 19 are provided. Between the compressor 1 and the four-way valve 16,
Discharge port of compressor 1 and first port 16 of four-way valve 16
a and the second line of the four-way valve 16
A suction-side line 22 that connects the port 16b and the suction port of the compressor 1 is provided. The discharge side line 21 is provided with an oil separator 23 for separating oil from high-pressure refrigerant. An accumulator 24 for separating the liquid-phase refrigerant and returning only the gas-phase refrigerant to the suction port of the compressor 1 is provided in the suction-side line 22.

The third port 16c of the four-way valve 16
The outdoor heat exchanger 17, the electronic expansion valve 18, the indoor heat exchanger 19, and the fourth port 16d of the four-way valve 16 are connected by lines 25, 26, 27, and 28. And
During cooling, the first port 16a and the third port 16c of the four-way valve 16 are connected, and the fourth port 16d and the second port 16b are connected, as shown by the solid arrow in FIG. The refrigerant discharged from the compressor 1 passes through the outdoor heat exchanger 17, the electronic expansion valve 18, and the indoor heat exchanger 19 in this order and returns to the compressor 1, and the outdoor heat exchanger 17 is a condenser and the indoor heat exchanger 19 is Functions as an evaporator. On the other hand, during heating, the first port 16a and the fourth port 16d of the four-way valve 16 are connected,
The communication between the third port 16c and the second port 16b allows the refrigerant discharged from the compressor 1 to pass through the indoor heat exchanger 19, the electronic expansion valve 18, and the outdoor heat exchange as indicated by the dashed arrow in FIG. After returning to the compressor 1 through the heat exchanger 17 in this order, the indoor heat exchanger 18 functions as a condenser and the outdoor heat exchanger 17 functions as an evaporator.

The line 25 between the third port 16c of the four-way valve 16 and the outdoor heat exchanger 17 has a double pipe heat exchanger 2
9 is provided, and cooling water obtained by collecting engine exhaust heat from the cooling water circuit 30 is guided to the double-pipe heat exchanger 29 mainly during heating. The cooling water circuit 30 is configured so that the cooling water flowing in a certain direction by the water pump 32 circulates through the exhaust gas heat exchanger 14, the engine water jacket 33, the thermostat 34, the radiator 35, and the like. A water passage 31 is provided, and a bypass passage 36 is provided which branches from the radiator 35 upstream of the main cooling water passage 31 and joins the main cooling water passage 31 downstream of the radiator 35 through the double pipe heat exchanger 29. ,
A linear three-way valve 37 is provided at a branch point of the bypass passage 36.

FIGS. 2 to 7 show the structure of the scroll compressor 1. FIG. The scroll compressor 1
Inside the casing 40, a scroll compressor 50 composed of an orbiting scroll 51 and a fixed scroll 52, a drive shaft 55 for driving the scroll compressor 50 by orbiting the orbiting scroll 51, It has a suction chamber 80 for sucking the fluid to be compressed according to the drive, and a discharge chamber 85 for discharging the fluid to be compressed according to the drive of the scroll compression unit. The drive shaft 55 is rotatably supported by the casing 40 in a state where the drive shaft 55 extends horizontally in a substantially horizontal direction, and a crank mechanism described later is attached to a front end (the right end in FIG. 1) of the drive shaft 55. The orbiting scroll 51 is connected via the like. The rear end (the left end in FIG. 1) of the drive shaft 55 is
, And a pulley 4b is provided around the outside thereof, and an electromagnetic clutch 57 is incorporated between the pulley 4b and the drive shaft 55.

The casing 40 includes a case 41 forming a rear outer shell and a main housing 42 forming a peripheral wall in front of the case 41. An outer peripheral wall 52c of the fixed scroll 52 is provided in front of the main housing 42. The cover 43 is disposed so as to form a part of the cover 40, and further in front of the cover 40. And these cases 4
1. The main housing 42, the fixed scroll 52, and the cover 43 are connected to each other by bolts, so that the drive shaft 55, the scroll compressor 50, the suction chamber 8
A casing body 40 a surrounding the discharge chamber 85 and the discharge chamber 85 is formed.

Further, an oil pan 40b for storing lubricating oil is provided in the casing 40.
a is provided so as to protrude downward from a. In this embodiment, a downwardly projecting oil pan component 44 is integrally coupled to the case 41, and an oil pan cover 45 is detachably attached to the front of this portion by bolts, so that the case 41 can be attached to the outside. Closed oil pan 40b
Is configured.

The internal structure of the scroll compressor 1 will be described more specifically. The orbiting scroll 51 of the scroll compression unit 50 includes a bottom plate 51a, a spiral body 51b protruding from the bottom plate 51a toward the fixed scroll 52, and a scroll shaft 51c protruding from the back surface of the bottom plate 51a toward the drive shaft 55. And the fixed scroll 52 has
A bottom plate 52a and the orbiting scroll 51 from the bottom plate 52a
It has a spiral body 52b protruding toward the side and an outer peripheral wall 52c forming a part of the casing 40. The spiral bodies 51b and 52b of the scrolls 51 and 52 are combined with each other by being shifted by 180 °, and between them. A compression chamber 53 is formed.

The scroll shaft 51c is eccentrically supported on the distal end of the drive shaft 55 via a crank mechanism including a slide bush 60 and the like. That is, a large-diameter separate cylindrical part is fixed to the distal end of the drive shaft 55 to form a cylindrical shaft portion 55a. Inside the cylindrical shaft portion 55a, the slide bush 60 is axially mounted. It is assembled so as to be able to slide within a predetermined range in a certain direction orthogonal to the drive shaft 55 and to co-rotate therewith. A through hole 60a is formed in the slide bush 60 at a position offset in the slidable direction with respect to the center. In the through hole 60a, a scroll shaft 51c of the orbiting scroll 51 is provided via a swivel bearing 61 and an inner bush 62. It is supported. As a result, the slide bush 60 is attached to the drive shaft 55, and the scroll shaft 51c turns around the drive shaft 55 while being offset from the center of the drive shaft 55.
, The outer periphery of the orbiting scroll 51 rolls along the fixed scroll 52, and the offset amount slightly fluctuates accordingly. That is, the rotational torque is
From the scroll shaft 51c via the slide bush 60
Conveyed to. Due to this rotational torque, a force inversely proportional to the offset amount acts on the scroll shaft 51c offset from the center of the drive shaft 55 from the slide bush 60 side. This force becomes a refrigerant compression force, and a part of this force and the centrifugal force acting on the orbiting scroll 51 presses the orbiting scroll 51 against the fixed scroll 52, thereby ensuring the sealing property of the wrap portion between the scrolls 51 and 52. Then, the outer periphery of the wrap portion of the orbiting scroll 51 rolls along the inner periphery of the wrap portion of the fixed scroll 52. Due to the inner peripheral shape of the wrap portion of the fixed scroll, the orbiting scroll 5
1 revolves around the drive shaft 55 while the offset amount of the scroll shaft 51c from the center of the drive shaft 55 is changed by the slide of the slide bush.

The slide bush 60 includes a slide bush 60 itself associated with the offset, a slewing bearing 61a,
A balancer 63 for eliminating unbalanced mass due to the inner bush 62 and the orbiting scroll 51 is provided. The balancer 63 balances static balance and dynamic balance with the balancer 77 described below, and removes the vibrating force caused by the unbalance mass.

A wall 42a connected to the main housing 42 is located around the cylindrical shaft portion 55a behind the orbiting scroll 51, and a thrust plate is provided between the wall 42a and the orbiting scroll 51. 64 and an Oldham ring 65 are arranged. The Oldham ring 65 is capable of swinging in an annular Oldham chamber 66 formed between the wall portion 42a and the orbiting scroll 51, and is capable of preventing the orbiting scroll 51 from rotating in the radial direction while preventing its rotation. It is engaged with the orbiting scroll 51 and the wall 42a to allow it.

With the rotation of the drive shaft 55, the scrolls 51b, 52b of the scrolls 51, 52 are moved 180 degrees.
The orbiting scroll 51 rotates (revolves) around the center of the fixed scroll 52 without rotating while maintaining contact with each other, thereby moving the refrigerant in the compression chamber 53 from the outer peripheral side to the inner peripheral side. It is designed to be compressed.

A suction port 67 is provided in the wall portion 42a, and a cutout 68 corresponding to the suction port 67 is provided in the bottom plate 51a of the orbiting scroll 51. A discharge port 69 is provided near the center of the bottom plate 52a of the fixed scroll 52, and a reed valve for preventing backflow is attached to the outer surface of the bottom plate 52a so as to cover the discharge port. In the illustrated example, the outlet side of the discharge port 69 is branched to form two openings 69a and 69b, and two reed valves 70a and 70b are provided correspondingly.

The drive shaft 55 has a cylindrical shaft portion 55a on the tip end side rotatably supported by a bearing support 71 provided on the inner peripheral side of the wall portion 42a via a main bearing 72. The rear shaft portion 55 b is rotatably supported by a bearing support 73 connected to the case 41 via an auxiliary bearing 74. The rear end of the drive shaft 55 is the case 4
1 is provided with a seal for preventing the refrigerant and oil from flowing out of the suction chamber 80 to the outside. In the example shown in the drawing, the mechanical seal 75 and the lip seal 76 are provided in order to enhance the sealing performance. Is provided. A balancer 77 is provided on the outer periphery of the front part of the drive shaft 55, and a cover 78 is provided around the balancer 77.

The suction chamber 80 is provided with the scroll compression section 50
A suction port 81 formed at an upper portion inside the case 41 on the rear side (drive shaft side) and provided at an upper end on the rear end side of the case 41 communicates with the suction chamber 80.
And the scroll compression section 50 communicate with each other via the suction port 67. An oil separating portion 82 is formed below the suction chamber 80. The oil separating portion 82 has a wall surface formed so as to change the flow direction of the refrigerant flowing into the suction chamber 80, separates oil while changing the flow direction of the refrigerant, and transfers the refrigerant after oil separation to the front. While being sent to the scroll compression section 50, the separated oil is caused to fall downward.

On the other hand, the discharge chamber 85 is provided in front of the scroll compression section 50 and is covered by the cover 43.
A discharge port 86 is provided at an upper end of the discharge chamber 85, and an injector pipe 87 is disposed inside the discharge chamber 85. The injector pipe 87 has a lower end opening to a lower part of the discharge chamber 85 and an upper end opening to the discharge port 86.

An oil pump 90 is mounted below the drive shaft 55 at a rear portion in the case 41. A pump shaft 91 of the oil pump 90 is arranged in parallel with the drive shaft 55, By providing gears 92, 93 meshing with each other on the drive shaft 55, 91,
With the rotation of the oil pump 90 through the gear 92.93
Is driven. The gear 92 is fixed to the drive shaft 55 not only in the rotational direction but also in the longitudinal direction.
A plate 94 fixed to the case 41 is located in front of the gear 92, and a thrust bearing 95 is interposed between the plate 94 and the gear 92 and between the gear 92 and the bearing support 73, The gear 92 also serves as a thrust plate. Thereby, the drive shaft 55 is fixed in the longitudinal direction.

Next, the specific structure of the lubrication system of the scroll compressor 1 will be described.

An oil strainer 96 is mounted inside the oil pan 40b, and a drain port 98 to which a drain plug 97 is mounted is provided at the bottom of the oil pan 40b. An oil supply passage 101 that guides oil in the oil pan 40b to the oil pump 90 is formed in the rear end wall of the case 41. The oil supply passage 101 has a lower end that projects into the oil pan 40 b and is connected to the oil strainer 96, while an upper end is connected to the oil inlet of the oil pump 90.

An oil passage 102 is connected to an oil outlet of the oil pump 90, and the oil passage 102 reaches a bearing support 73 in which the auxiliary bearing 74 is arranged. A relief passage 103 for relieving excess oil from the oil outlet is formed between the oil inlet and the oil outlet of the oil pump 90. The relief passage 103 has a pressure of the oil outlet. A relief valve 104 is provided which opens when the pressure exceeds a predetermined value.

The auxiliary bearing 74 and the shaft portion 55 of the drive shaft 55
b, a circumferential groove 1 communicating with the oil passage 102
A radial passage 106 communicating with the circumferential groove 105 and an axial passage 107 communicating with the passage 106 are formed in the shaft portion 55b. A nozzle 108 communicating with the passage 107 is provided at a front end of the drive shaft 55, and the nozzle 108 is opened inside the scroll shaft 51c.

A part of the oil discharged from the oil pump 90 and guided from the oil passage 102 to the portion where the auxiliary bearing 74 is disposed is supplied to the mechanical seal 75, and another part is supplied to the thrust bearing 95. And the remainder passes through passages 106 and 107
And is supplied to the slewing bearing 61 and the main bearing 72.

The oil after lubricating the mechanical seal 75 and the oil after lubricating the thrust bearing 95 are supplied to the lower oil pan 4 via a passage in the case 41 or the like.
0b. In addition, the slewing bearing 6
The oil that has lubricated the first bearing 72 and the main bearing 72 is supplied to a return passage 109 formed in a wall portion 42 a in the main housing 42.
After being partially provided for lubrication of the thrust surface of the thrust plate 64, it is guided to the oil return hole 110 provided at the lower portion of the wall portion 42a via the Oldham chamber 66. .

Further, inside the case 41, a part constituting the casing body 40a and the oil pan 40b
A partition 111 is formed in a substantially horizontal direction between the partition 111 and the portion constituting the partition. The partition wall 111 has an oil return through hole 112 at a position below the oil separating portion 82.
Is formed, and a through hole 113 for returning oil is provided on the front side near the scroll compression section 50 as well. A baffle plate 114 is arranged below the rear through-hole 112. Also, the through hole 113 on the front side
, A pipe 115 is attached in an oblique direction, and the lower end of the pipe 115 reaches near the bottom surface of the oil pan 40b. The return passage 109 and the oil return hole 11
The oil passing through 0 is guided into the through hole 113.

According to the above-described scroll compressor 1 of the present embodiment, when the drive shaft 55 is rotated by the driving force transmitted from the external engine, the scroll compressor 50
As the orbiting scroll 51 orbits, the refrigerant as the fluid to be compressed is sucked into the scroll compression section 50 from the suction port 81 through the suction chamber 80 and the suction port 67, compressed there, and then discharged from the discharge port 69. It is sent out to the chamber 85 and is discharged from the discharge port 86 to the outside of the compressor 1. At this time, the oil remaining in the lower part of the discharge chamber 85 is sucked up by the action of the injector pipe 87 and discharged to the refrigerant circuit. This oil is oil separator 23
(Refer to FIG. 1) from the refrigerant and return to the suction chamber of the compressor 1.

During the operation of the compressor 1, the oil pump 90 is operated in conjunction with the rotation of the drive shaft 55.
Operates, the oil in the oil pan 40b is sent to the oil passage 102 through the oil supply passage 101 and the oil pump 90, and the sub bearing 74, the mechanical seal 75, the thrust bearing 95, the slewing bearing 61, the main bearing 72 , The thrust plate 64 and the like, and these parts are well lubricated. Then, the oil after lubricating these parts is collected in the oil pan 40b through the through holes 112 and 113 formed in the partition wall 111.

The oil pan 40b is provided so as to protrude downward from the casing body 40a, and the oil level in the oil pan 40b is adjusted by the scroll compressor 50, the drive shaft 55, the suction chamber 80, and the discharge chamber in the casing body 40a. The suction chamber 8 is arranged so as to be separated from the chamber 85.
0, the oil is agitated by the flow of the refrigerant in the discharge chamber 85 or the rotation of the drive shaft 55, etc.
It is possible to prevent the oil level from swaying due to vibration transmitted from the like. Thereby, mixing of oil into the refrigerant compressed in the casing body 40a is suppressed.

The oil already mixed in the refrigerant sucked from the discharge port 69 is separated from the refrigerant by the oil separating portion 82, and falls down, and falls through the through hole 1.
12, the oil is collected in the oil pan 40b, and is prevented from being re-mixed with the refrigerant. In this case, the casing body 40a
The suction chamber 80 is arranged on one side (rear) and the discharge chamber 85 on the other side (front) with respect to the scroll compression section 50,
In addition, since the oil separating section 82 is provided below the suction chamber 80, the flow of the refrigerant from the suction side to the discharge side via the scroll compression section 50 becomes smooth, and the oil separating action is enhanced.

By these actions, the amount of oil mixed in the refrigerant is reduced, and the compression efficiency is improved.

Further, in this embodiment, the casing body 4
By providing the partition wall 111 between the oil pan 40a and the oil pan 40b, the action of preventing oil from being mixed into the refrigerant is enhanced. And the oil after lubrication is
The oil pan 40b is collected through the through holes 112 and 113 provided in the oil pan 40b. Since the baffle plate 114 is provided below the through hole 112,
The inflow of the refrigerant into Ob is suppressed. Also, the through hole 113
Although a relatively large amount of oil lubricating the slewing bearing 61, the main bearing 72, etc., flows through the pipe 115, the pipe 115 extending diagonally downwards
15, smoothly flows into the oil pan 40b,
Oil scattering is suppressed.

Since the oil pan 40b is composed of a part 44 integral with the casing body 40a and an oil pan cover 45 detachably connected to the part, the oil pan cover 45 is different in size. The capacity of the oil pan 40b can be easily changed by replacing the oil pan 40b. Therefore, when the model of the air conditioner or the like in which the scroll compressor 1 is incorporated changes, the amount of oil stored in the oil pan 40b can be adjusted as required.

In the above embodiment, the part forming part of the casing body 40a and the part 44 forming part of the oil pan 40b are integrally formed by the case 41, but the casing body 40a and the oil The pan 40b may be separately formed in advance, and the oil pan 40b may be connected below the casing body 40a.

[0047]

As described above, according to the present invention, in a scroll compressor, a casing body is formed so as to surround a horizontally disposed drive shaft, a scroll compression section, a suction chamber and a discharge chamber, and a lubricating oil is stored. The oil pan is provided so as to protrude downward from the casing main body, so that the oil is stored in the oil pan separated downward from the scroll compression section, the drive shaft, the suction chamber and the discharge chamber in the casing main body. Therefore, it is possible to suppress the oil from being mixed into the fluid to be compressed due to the stirring of the oil or the like. For this reason, it is possible to increase the substantial discharge amount of the fluid to be compressed and increase the compression efficiency.

[Brief description of the drawings]

FIG. 1 is a schematic diagram of an air conditioner shown as an example of application of a scroll compressor of the present invention.

FIG. 2 is a longitudinal sectional view of a scroll compressor according to one embodiment of the present invention.

FIG. 3 is a side view of a case in the scroll compressor and an oil pump, an oil strainer, and the like in the case as viewed from a line AA in FIG. 2;

FIG. 4 is a side view of the main housing and a mechanism inside the main housing taken along the line BB in FIG. 2 with the cover and both the revolving and fixed scrolls removed;

FIG. 5 is a side view of the main housing and its internal mechanism viewed from the line BB in FIG. 2 in a state where the orbiting scroll is assembled to the one shown in FIG. 4;

FIG. 6 is a side view of the main housing and its internal mechanism viewed from the line BB in FIG. 2 in a state where a fixed scroll is further assembled to the main housing shown in FIG. 5;

FIG. 7 is a side view of the scroll compressor as viewed from the right side of FIG. 2;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Scroll compressor 40 Casing 40a Casing main body 40b Oil pan 41 Case 42 Main housing 45 Oil pan cover 50 Scroll compression part 51 Orbiting scroll 52 Fixed scroll 55 Drive shaft 80 Suction chamber 85 Discharge chamber 90 Oil pump 111 Partition wall

Claims (4)

[Claims] 1. A scroll compression unit in a casing,
A scroll provided with a drive shaft for driving the scroll compressor, a suction chamber for sucking a fluid to be compressed according to the drive of the scroll compressor, and a discharge chamber for discharging a fluid to be compressed according to the drive of the scroll compressor. In the compressor, the drive shaft is set to extend horizontally in a substantially horizontal direction, and a casing main body is formed so as to surround the drive shaft, the scroll compression unit, the suction chamber and the discharge chamber, and the oil pan for storing lubricating oil is formed as described above. A scroll compressor provided so as to protrude downward from a casing body. 2. An oil separating section for separating oil from a fluid to be compressed is provided on at least one of a suction chamber side and a discharge chamber side in a casing body, and the oil separating section is communicated with the oil pan. The scroll compressor according to claim 1, wherein 3. A partition is provided between the casing main body and the oil pan, and an oil pump is disposed in the casing main body.
3. The scroll compressor according to claim 1, wherein an oil passage for guiding oil from the oil pan to the oil pump is provided in the casing, and an oil return hole is formed in the partition. 4. The oil pan according to claim 1, wherein the oil pan comprises a portion connected to the casing body and an oil pan cover detachably connected to the portion.
3. The scroll compressor according to any one of 3.