WO2018051502A1

WO2018051502A1 - Compressor

Info

Publication number: WO2018051502A1
Application number: PCT/JP2016/077528
Authority: WO
Inventors: 山下　智弘; 修平小山; 政則伊藤; 加藤　啓介
Original assignee: 三菱電機株式会社
Priority date: 2016-09-16
Filing date: 2016-09-16
Publication date: 2018-03-22

Abstract

Provided is a compressor comprising: an enclosed container including an oil sump for accumulating refrigeration machine oil; a sliding section accommodated within the enclosed container and sliding during operation; an oil discharge pipe accommodated within the enclosed container and returning excess refrigeration machine oil in the sliding section back to the oil sump from the sliding section; and a plate-shaped support member affixed within the enclosed container and supporting the oil discharge pipe. The oil discharge pipe includes a first pipe and a second pipe which is connected to the first pipe and through which refrigeration machine oil flowing from the first pipe flows. The support member has formed therein a support section through which the second pipe is passed and which supports the oil discharge pipe.

Description

Compressor

The present invention relates to a compressor, and more particularly to a compressor having a mechanism for discharging refrigeration oil from a sliding portion that slides when the compressor is operated to an oil sump.

The compressor includes, for example, a compression mechanism section, a frame that houses the compression mechanism section, a bearing, a main shaft, an electric motor, and an oil sump. The refrigerating machine oil stored in the oil sump is supplied to a configuration including sliding portions such as a compression mechanism portion and a bearing, and wear of members constituting the sliding portion is suppressed. Excess refrigeration oil supplied to the sliding portion passes through an oil discharge path provided in the compressor and returns to the oil sump again.

As a means for constituting the oil drainage path, there has been proposed one that brazes and fixes a pipe for discharging surplus refrigerating machine oil to a plate material attached to a frame that accommodates the compression mechanism (for example, see Patent Document 1). .

JP 2014-109223 A

If the pipe and the plate material are fixed by brazing as a means for constituting the oil drainage path, there is a problem that a brazing material cost and a brazing work cost are required, and the manufacturing cost of the compressor increases accordingly. . Moreover, when brazing is performed, foreign matters such as flux and oxide scale may enter the sealed container of the compressor. Such foreign matter, for example, enters the sliding portion such as the compression mechanism and the bearing during the operation of the compressor, causes a malfunction, and has a problem of reducing the reliability of the compressor.

The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a compressor capable of suppressing an increase in manufacturing cost and improving reliability. Yes.

The compressor according to the present invention includes a sealed container including an oil sump for storing refrigerating machine oil, a sliding part that is accommodated in the sealed container and slides during operation, and is accommodated in the sealed container, and an excess of the sliding part An oil drain pipe that returns the refrigerating machine oil from the sliding portion to the oil sump, and a plate-like support member that is fixed in the airtight container and supports the oil drain pipe. A second pipe that is connected to the first pipe and through which the refrigerating machine oil that has flown from the first pipe flows, the support member having the second pipe inserted therein and supporting the drain oil pipe Is formed.

According to the present invention, since the above configuration is provided, an increase in manufacturing cost can be suppressed and reliability can be improved.

1 is an overall view of a compressor 100 according to Embodiment 1 of the present invention. It is explanatory drawing of the flame | frame with which the compressor which concerns on Embodiment 1 of this invention is provided. It is explanatory drawing of the oil drainage pipe 22 with which the compressor which concerns on Embodiment 1 of this invention is equipped, and a flame | frame. It is explanatory drawing of the waste oil pipe 22 with which the compressor which concerns on Embodiment 1 of this invention is provided. It is explanatory drawing of the plate etc. in which the oil drainage pipe 22 with which the compressor which concerns on Embodiment 1 of this invention is provided was inserted. It is explanatory drawing of the waste oil pipe 22 with which the compressor which concerns on Embodiment 2 of this invention is provided. It is explanatory drawing of the plate etc. in which the oil drainage pipe 22 with which the compressor which concerns on Embodiment 2 of this invention is provided was inserted. It is explanatory drawing of the waste oil pipe 22 with which the compressor which concerns on Embodiment 3 of this invention is provided. It is explanatory drawing of the plate etc. in which the oil drainage pipe 22 with which the compressor which concerns on Embodiment 3 of this invention is provided was inserted. It is explanatory drawing of the plate etc. in which the oil drainage pipe 22 with which the compressor which concerns on Embodiment 4 of this invention is provided was inserted. It is a modification of the plate 23 shown in FIG. It is explanatory drawing of the waste oil pipe 22 with which the compressor which concerns on Embodiment 5 of this invention is provided.

Hereinafter, embodiments of the present invention will be described with reference to the drawings as appropriate. In addition, in the following drawings including FIG. 1, the relationship of the size of each component may be different from the actual one. Further, in the following drawings including FIG. 1, the same reference numerals denote the same or equivalent parts, and this is common throughout the entire specification. Furthermore, the forms of the constituent elements shown in the entire specification are merely examples, and are not limited to these descriptions.

Embodiment 1 FIG.
FIG. 1 is an overall view of a compressor 100 according to the first embodiment. FIG. 2A is an explanatory diagram of the frame 3 provided in the compressor according to the first embodiment. FIG. 2B is an explanatory diagram of the oil drainage pipe 22 and the frame 3 provided in the compressor according to the first embodiment. FIG. 2C is an explanatory diagram of the oil discharge pipe 22 provided in the compressor according to the first embodiment. 2A and 2B (a) are views seen from the lower surface side of the frame 3. FIG. The configuration of the compressor 100 will be described with reference to FIGS. 1 to 2C.

[Description of overall configuration of compressor 100]
The compressor 100 is a scroll compressor. The compressor 100 accommodates the fixed scroll 1, the swing scroll 2 disposed opposite to the fixed scroll 1, the fixed scroll 1, the frame 3 to which the fixed scroll 1 is fixed, and the main frame located at the center of the frame 3. A bearing 4 and a concave rocking bearing 5 located at the center of the rocking scroll 2 are provided. The compression mechanism P is composed of a fixed scroll 1, a swing scroll 2, and the like. The compression mechanism P has a function of compressing the refrigerant. The compression mechanism part P is a structure corresponding to a sliding part. The compression mechanism part P as a sliding part is accommodated in the frame 3.

The compressor 100 includes a plate 23 fixed to the frame 3 and an oil discharge pipe 22 supported by the plate 23. The plate 23 is a plate-like member, can be easily configured from sheet metal, and can reduce the manufacturing cost. The plate 23 has a function of supporting the oil drain pipe 22. The plate 23 is a structure corresponding to a support member. The plate 23 can be made of metal or resin, for example. The compressor 100 includes a thrust plate 6 serving as a thrust bearing for supporting the orbiting scroll 2 in the axial direction, an Oldham ring 7 that prevents the orbiting scroll 2 from rotating and imparts an orbiting motion, an electric motor rotor 8 and an electric motor. And a stator 9. The motor rotor 8 and the motor stator 9 constitute an electric motor that supplies power for rotating the orbiting scroll 2.

The compressor 100 includes a main shaft 10 that is rotationally driven by an electric motor, and an eccentric pin portion 10 a that supports the orbiting scroll 2 to revolve the orbiting scroll 2. Further, the main shaft 10 includes a balancer 11 provided below the eccentric pin portion 10 a and above the motor rotor 8, and a balancer 12 provided below the motor rotor 8. The balancer 11 and the balancer 12 have a function of suppressing the movement of the main shaft 10 from deviating from the rotation center of the main shaft 10 when the main shaft 10 rotates.

The compressor 100 includes a sub-frame 13 provided at the lower portion in the axial direction of the main shaft 10 and a ball bearing 14 provided in a bearing housing portion formed at the center of the sub-frame 13. The ball bearing 14 is fixed by pressing the outer ring into the bearing housing portion of the subframe 13. The subframe 13 is provided with a positive displacement oil pump 15. The main shaft 10 is integrally provided with a pump shaft 10 b that transmits a rotational force to the oil pump 15. In the center of the main shaft 10, a refrigerator oil hole 10 c that penetrates from the lower end of the pump shaft 10 b to the upper end of the main shaft 10 is provided. The lower end side of the refrigerator oil hole 10 c is connected to the oil pump 15 and communicates with the oil pump 15.

The compressor 100 includes an airtight container 17 that houses various components such as the fixed scroll 1, the swing scroll 2, the frame 3, the oil drain pipe 22, the plate 23, and the electric motor described above. The sealed container 17 includes a sealed container body 17a, a sealed container lower part 17b, and a sealed container upper part 17c. A compression mechanism P is disposed on the upper part of the closed container body 17a. A suction pipe 18 for taking in the refrigerant into the sealed container 17 is provided in the sealed container body 17a. An electric motor rotor 8 and an electric motor stator 9 are disposed below the hermetic container body 17a. An oil sump 16 for storing refrigerating machine oil is formed in the sealed container lower part 17b. The airtight container upper part 17c is provided with a discharge pipe 19 for discharging the refrigerant compressed by the compression mechanism part to the outside of the container.

The frame 3 is provided with an oil drain hole 3c that penetrates the inside of the frame 3 and the outside of the frame 3. An oil drain pipe 22 is inserted into the oil drain hole 3c. The oil drain pipe 22 is supported by a plate 23. The oil drain pipe 22 is a pipe that is accommodated in the sealed container 17 and returns excess refrigeration oil in the compression mechanism section from the compression mechanism section to the oil sump 16. The oil drain pipe 22 can be made of, for example, copper, iron, or resin. The upper end of the oil drain pipe 22 is inserted into the frame 3. Moreover, the oil drain pipe 22 is arrange | positioned at the clearance gap formed between the outer peripheral side of the electric motor stator 9, and the airtight container trunk | drum 20a, for example.

The frame 3 includes a first cylindrical portion 3A, a second cylindrical portion 3B, and a third cylindrical portion 3C. The frame 3 is provided with a rib portion 3D. In the first embodiment, description will be made assuming that the rib portion 3D is included in the frame 3, but the rib portion 3D and the frame 3 may be separate. The first cylindrical portion 3A, the second cylindrical portion 3B, and the third cylindrical portion 3C are cylindrical members (cylindrical members in the first embodiment). An oil drain hole 3c is formed in the first cylindrical portion 3A. The first cylindrical portion 3 </ b> A has a side peripheral surface fixed to the sealed container 17. The lower side of the first cylindrical portion 3A is connected to the second cylindrical portion 3B. An orbiting scroll 2 is accommodated inside the first cylindrical portion 3A. The outer diameter of the first cylindrical portion 3A is larger than the outer diameter of the second cylindrical portion 3B and the outer diameter of the third cylindrical portion 3C. A rib portion 3D is provided on the lower surface of the first cylindrical portion 3A. The rib portions 3D are arranged radially in the radial direction of the first cylindrical portion 3A. The second cylindrical part 3B has an upper side connected to the first cylindrical part 3A and a lower side connected to the third cylindrical part 3C. The outer diameter of the second cylindrical portion 3B is larger than the outer diameter of the third cylindrical portion 3C. A rib portion 3D is provided on the side peripheral surface of the second cylindrical portion 3B. The upper side of the third cylindrical portion 3C is connected to the second cylindrical portion 3B.

The rib portion 3D is a support member that supports the plate 23. The rib portion 3D is fixed to the lower side of the first cylindrical portion 3A of the frame 3. The rib portion 3D is provided on the side of the second cylindrical portion 3B. The rib portion 3D is provided so as to extend radially from the side peripheral surface of the second cylindrical portion 3B. A plurality of rib portions 3D are provided on the frame 3, and two rib portions 3D are provided in the first embodiment. As shown in FIG. 2A, an oil drain hole 3c is formed at a position between one rib portion 3D and the other rib portion 3D. An oil drain pipe 22 is inserted into the oil drain hole 3c. In the plurality of rib portions 3D, the first direction D1 from the central axis of the frame 3 toward the one rib portion 3D and the second direction D2 from the central axis of the frame 3 toward the other rib portion 3D are orthogonal to each other. (So as to form 90 degrees). Note that the first direction D1 and the second direction D2 do not necessarily have to be orthogonal to each other, and may be less than 90 degrees or 90 degrees or more. In Embodiment 1, if the angle in the first direction D1 is defined as 0 degree and the angle in the second direction D2 is defined as 90 degrees, the direction of the oil drain hole 3c is 45 degrees. In addition, the direction of the oil drain hole 3c is not limited to being intermediate between the first direction D1 and the second direction D2, and may be deviated from 45 degrees.

[Configuration explanation of frame 3, oil drain pipe 22, plate 23, etc.]
FIG. 3 is an explanatory diagram of a plate or the like into which the oil drain pipe 22 provided in the compressor 100 according to the first embodiment is inserted.
The oil discharge pipe 22 includes a first pipe 22A, a second pipe 22B, and a third pipe 22C. One end of the first pipe 22A is connected to the oil drain hole 3c. The other end of the first pipe 22A is connected to one end of the second pipe 22B. The other end of the second pipe 22B is connected to one end of the third pipe 22C. The second pipe 22B has an outer diameter smaller than that of the first pipe 22A and is reduced in diameter. The second pipe 22B has a smaller outer diameter than the third pipe 22C and has a reduced diameter. The diameters of the first pipe 22A and the third pipe 22C may be the same or different. Further, the oil draining pipe 22 may be configured by processing one pipe, or may be configured by connecting a plurality of pipes.

The first pipe 22A is linear. The second pipe 22B is also linear. The third pipe 22C has a crank shape.

The length of the second pipe 22B may be equal to or greater than the plate thickness of the plate 23. Thus, the second pipe 22B can be inserted into the plate 23. In addition, the connecting portion between the first pipe 22 </ b> A and the second pipe 22 </ b> B in the oil drain pipe 22 is caught by the plate 23, and the oil drain pipe 22 can be reliably supported in the sealed container 17. The third pipe 22C may be in contact with the plate 23 or may be separated.

The plate 23 has a plurality of openings. The plate 23 is formed with an opening 23a into which the oil drainage pipe 22 is inserted as a first opening and a bolt fixing hole 23b as a second opening. The opening 23a corresponds to the support portion of the plate. Although two openings 23a are formed in the plate 23, the present invention is not limited to this. There may be a single opening 23a, or three or more openings 23a may be formed. Bolts 24 are inserted into the bolt fixing holes 23b. When the bolt 24 is fastened to the frame 3, the frame 3 and the plate 23 are fixed. The fixing means is not limited to this. For example, an adhesive may be used instead of the bolt 24, or the bolt 24 and the adhesive may be used in combination.

The plate 23 is an arc-shaped plate member. One bolt fixing hole 23 b is formed at one end of the plate 23. At the other end of the plate 23, the other bolt fixing hole 23b is formed. An opening 23 a is formed between one end and the other end of the plate 23. The shape of the plate 23 is not limited to the arc-shaped plate member, and may be a fan-like plate member, for example. In the first embodiment, the suction pipe 18 is provided at the same height position as the height position of the plate 23. For this reason, the plate 23 and the oil draining pipe 22 are preferably arranged on the opposite side of the suction pipe 18 with the central axis (main shaft 10) of the frame 3 as a boundary. Thereby, the refrigerant flowing from the suction pipe 18 to the sealed container 17 can be prevented from colliding with the plate 23, and the refrigerant can be immediately flowed from the suction pipe 18 to the sealed container 17.

The shape of the bolt fixing hole 23b and the shape of the opening 23a are circular. The bolt 24 includes a screw part 24a inserted into the bolt fixing hole 23b and a head part 24b having an outer diameter larger than that of the screw part 24a. The head 24 b is pressed against the surface of the plate 23 in a state where the bolt 24 is fastened to the frame 3. The bolt fixing hole 23b has a larger diameter than the screw portion 24a and a smaller diameter than the head portion 24b. Further, the difference between the outer diameter of the second pipe 22B and the diameter of the opening 23a is smaller than the difference between the outer diameter of the screw portion 24a and the diameter of the bolt fixing hole 23b. By setting the diameter in this way, when the plate 23 is fastened, the backlash (clearance) between the bolt fixing hole 23b and the screw portion 24a is used to fasten the plate 23 toward the center of the frame 3. be able to. By fastening in this way, the second pipe 22B is pulled toward the center of the frame 3 at the periphery of the opening 23a of the plate 23, and the oil draining pipe 22 is more reliably attached to the periphery of the opening 23a of the plate 23. And the reliability of supporting the oil drainage pipe 22 is improved.

When the compressor 100 is manufactured, first, the oil drain pipe 22 is inserted into the opening 23a and hooked. With the hook, the bolt 24 is inserted into the bolt fixing hole 23b, and the frame 3 and the plate 23 are inserted. And fix.

[Description of Operation of Compressor 100]
Next, the operation of the compressor 100 will be described. When power is applied to the motor stator 9, the main shaft 10 is rotationally driven by the motor rotor 8. Then, the rotational force is transmitted to the oscillating bearing 5 through the eccentric pin portion 10 a and from there to the oscillating scroll 2. At this time, the orbiting scroll 2 is restrained from rotating by the Oldham ring 7 that reciprocates in the Oldham groove of the orbiting scroll 2 and the Oldham groove of the frame 3 and performs the orbiting motion.

The frame 3 having the main bearing 4 that supports the rotation of the main shaft 10 and the sub-frame 13 having the bearing housing portion that press-fits the outer ring of the ball bearing 14 in the center are fixed in the sealed container 17.

Gas such as refrigerant and air is sucked into the sealed container 17 from the suction pipe 18 and enters the compression chamber 20 formed by the orbiting scroll 2 and the fixed scroll 1 from the suction port 3 a of the frame 3. The compression chamber 20 is moved to the center of the orbiting scroll 2 by the orbiting motion of the orbiting scroll 2, and is further compressed to a high-temperature and high-pressure refrigerant by reducing the volume. The compressed refrigerant passes through the discharge port 1 a of the fixed scroll 1, pushes and opens the discharge valve 21, passes through the high-pressure portion in the sealed container 17, and is discharged from the sealed container 17 through the discharge pipe 19.

Refrigerating machine oil is sucked up by the oil pump 15 from the oil reservoir 16 to the upper end of the main shaft 10 through the refrigerating machine oil hole 10 c of the main shaft 10. The sucked refrigeration oil lubricates sliding portions such as the main bearing 4 and the swing bearing 5, and a part of the lubricated refrigeration oil exits from the discharge pipe 19 together with the compressed gas. The remaining excess refrigeration oil passes through the oil drainage pipe 22 from the oil drainage hole 3c provided in the frame 3, and is discharged into the gap formed by the outer peripheral side of the motor stator 9 and the hermetic container body 17a. Return to.

[Effect of Embodiment 1]
The compressor 100 according to the first embodiment employs a configuration in which the oil drain pipe 22 and the plate 23 are not brazed to the plate 23 but the oil drain pipe 22 is supported by the plate 23. . For this reason, it can avoid that a brazing material cost and a brazing work cost are required, and an increase in the manufacturing cost of the compressor 100 can be suppressed. Further, since the compressor 100 is not configured to perform brazing, it is possible to prevent foreign matters such as flux and oxide scale from entering the sealed container 17 of the compressor 100. That is, the compressor 100 according to the first embodiment avoids malfunction due to foreign matters such as flux and improves reliability.

In Embodiment 1, the scroll compressor has been described as an example, but the present invention is not limited to this. For example, it can be applied to other compressors.

In the first embodiment, the mode in which the portion into which the oil drainage pipe 22 is inserted is a hole (opening 23a) has been described as an example. However, the present invention is not limited to this. For example, you may comprise by a notch instead of the opening part 23a.

Embodiment 2. FIG.
FIG. 4 is an explanatory diagram of the oil discharge pipe 22 provided in the compressor according to the second embodiment.
FIG. 5 is an explanatory diagram of a plate or the like into which the oil drain pipe 22 provided in the compressor according to the second embodiment is inserted. The second embodiment is different from the first embodiment in that the shape of the oil discharge pipe 22 is different. In the second embodiment, portions common to the first embodiment are denoted by the same reference numerals, description thereof is omitted, and differences from the first embodiment will be mainly described.

The first pipe 22A has a crank shape. The first pipe 22A includes a first bent portion R1 and a second bent portion R2. The first pipe 22A includes two straight pipes. Specifically, the first pipe 22A includes a first straight portion 22A1 and a second straight portion 22A2. The first straight portion 22A1 is connected to the oil drain hole 3c. The second straight portion 22A2 is provided, for example, in parallel with the plate 23, and has one end connected to the first bent portion R1 and the other end connected to the second bent portion R2. The first bent portion R1 has one end connected to the first straight portion 22A1 and the other end connected to the second straight portion 22A2. The second bent portion R2 is connected to the second pipe 22B.

Note that the third pipe 22C is linear. The oil drain hole 3 c is disposed near the center of the frame 3.

[Effect of Embodiment 2]
In the second embodiment, the oil drain pipe 22 has an axis A1 passing through the first straight portion 22A1 and an axis A2 passing through the second pipe 22B. For this reason, rotation around the portion where the oil drainage pipe 22 is inserted into the oil drainage hole 3c can be restricted, and the lower end position of the oil drainage pipe 22 can be prevented from shifting.

Also, by arranging the oil drain hole 3c closer to the center of the frame 3, the bending curvature of the oil drain pipe 22 can be increased, and the first bent portion R1 and the second bent portion can be increased. The second straight portion 22A2 between the second oil pipe and R2 can be secured, and the curvature improvement and flatness of the oil drainage pipe 22 can be improved. By improving the curvature, it is possible to configure the oil drain pipe 22 with an iron pipe, and further suppress an increase in the manufacturing cost of the compressor.

Embodiment 3 FIG.
FIG. 6 is an explanatory diagram of the oil discharge pipe 22 provided in the compressor according to the third embodiment.
FIG. 7 is an explanatory diagram of a plate or the like into which the oil drain pipe 22 provided in the compressor according to the third embodiment is inserted. The third embodiment is different from the first and second embodiments in that the shape of the oil discharge pipe 22 is different. In the third embodiment, portions common to the first and second embodiments are denoted by the same reference numerals and the description thereof is omitted, and the difference from the first and second embodiments will be mainly described.

The shape of the first pipe 22A in the third embodiment is the same as the shape of the first pipe 22A described in the second embodiment. However, in the third embodiment, the second straight portion 22A2 is placed on the plate 23. That is, when the second straight portion 22A2 is supported on the plate 23, the vertical movement of the oil discharge pipe 22 is described.

Also, the second pipe 22B has the same diameter as the first pipe 22A and the third pipe 22C. In other words, the portion of the oil drain pipe 22 that is inserted into the plate 23 is not reduced in diameter. In the third embodiment, the second bent portion R2 is inserted into the opening 23a of the plate 23. However, the second bent portion R2 does not necessarily have to be hooked on the opening 23a. Since the second bent portion R2 is inserted into the opening 23a of the plate 23, the rotation of the oil discharge pipe 22 with the first straight portion 22A1 as an axis can be regulated. In the third embodiment, the opening 23a corresponds to the restricting portion.

[Effect of Embodiment 3]
In the third embodiment, the same effect as in the second embodiment can be obtained without providing a reduced diameter portion (second pipe 22B) in the oil discharge pipe 22. For example, in the third embodiment, rotation around the portion where the oil drain pipe 22 is inserted into the oil drain hole 3c can be restricted, and the lower end position of the oil drain pipe 22 is prevented from shifting. can do. In the third embodiment, the second straight portion 22A2 is disposed on the plate 23, and the axial support (vertical direction) of the oil discharge pipe 22 can also be realized.

Embodiment 4 FIG.
FIG. 8 is an explanatory diagram of a plate or the like into which the oil drain pipe 22 provided in the compressor according to the fourth embodiment is inserted. FIG. 9 is a modification of the plate 23 shown in FIG.
The fourth embodiment is different from the first and second embodiments in that the shape of the plate 23 is different. In the fourth embodiment, parts common to the first and second embodiments are denoted by the same reference numerals, and the description thereof is omitted. The difference from the first and second embodiments will be mainly described. In the fourth embodiment, in addition to the configuration of the first or second embodiment, the opening 23a provided in the plate 23 is configured as a triangle (FIG. 8) or an ellipse (FIG. 9).

[Effect of Embodiment 4]
In the first and second embodiments, the shape of the opening 23a provided in the plate 23 is circular. For this reason, the contact position of the oil drain pipe 22 and the opening part 23a is one place. On the other hand, in the fourth embodiment, the shape of the opening 23a is a triangle or an ellipse. For this reason, the contact position of the 2nd pipe 22B of the oil drainage pipe 22 and the opening part 23a becomes two places. For this reason, in this Embodiment 4, the support force of the oil drainage pipe 22 by the plate 23 can be strengthened more.

Embodiment 5 FIG.
FIG. 10 is an explanatory diagram of the oil discharge pipe 22 provided in the compressor according to the fifth embodiment. FIG. 10A is an enlarged view of a main part of the aspect of the oil drain pipe 22 in the first, second, and fourth embodiments, and FIG. 10B is a diagram of the aspect of the oil drain pipe 22 in the present fifth embodiment. It is a principal part enlarged view. The fifth embodiment is different from the first, second, and fourth embodiments in that the shape of the oil discharge pipe 22 is different. In the fifth embodiment, portions common to the first, second, and fourth embodiments are denoted by the same reference numerals, and the description thereof is omitted. The description will focus on differences from the first, second, and fourth embodiments.

In

Embodiments

1, 2, and 4, the oil drain pipe 22 has a reduced diameter at the position of the second pipe 22B. In the fifth embodiment, the oil drainage pipe 22 is expanded in diameter at the position of the second pipe 22B. The oil draining pipe 22 includes a second pipe 22BB having a larger outer diameter than the first pipe 22A and the third pipe 22C. And the connection part of 2nd pipe 22BB and 3rd pipe 22C among the oil drainage pipes 22 is hooked by the opening part 23a as a support part. The oil drainage pipe 22 is supported by the plate 23 because the connecting portion is hooked on the opening 23a. Even in the fifth embodiment, the same effect as in the first, second, and fourth embodiments can be obtained.

1 fixed scroll, 1a discharge port, 2 rocking scroll, 3 frame, 3A first cylindrical part, 3B second cylindrical part, 3C third cylindrical part, 3D rib part, 3a suction port, 3c discharge Oil hole, 4 main bearing, 5 rocking bearing, 6 thrust plate, 7 Oldham ring, 8 motor rotor, 9 motor stator, 10 main shaft, 10a eccentric pin part, 10b pump shaft, 10c refrigerator oil hole, 11 balancer, 12 Balancer, 13 subframe, 14 ball bearing, 15 oil pump, 16 oil sump, 17 sealed container, 17a sealed container body, 17b sealed container lower part, 17c sealed container upper part, 18 suction pipe, 19 discharge pipe, 20 compression chamber, 20a, sealed container body, 21 discharge valve, 22 oil drain pipe, 22A first pipe, 2A1 1st straight line part, 22A2 2nd straight line part, 22B 2nd pipe, 22BB 2nd pipe, 22C 3rd pipe, 23 plate, 23a opening part (support part), 23b bolt fixing hole, 24 bolt 24a thread part, 24b head part, 100 compressor, A1 axis, A2 axis, P compression mechanism part, R1 first bending part, R2 second bending part.

Claims

A sealed container containing an oil sump for storing refrigerating machine oil;
A sliding portion that is housed in the sealed container and slides during operation;
An oil drain pipe that is housed in the sealed container and returns excess refrigeration oil in the sliding portion from the sliding portion to the oil sump;
A plate-like support member fixed in the sealed container and supporting the oil drain pipe;
With
The oil drain pipe includes a first pipe and a second pipe connected to the first pipe and through which the refrigerating machine oil flowing from the first pipe flows.
The second pipe is inserted into the support member, and a support portion that supports the oil drain pipe is formed. Compressor.
A frame that is fixed in the sealed container and accommodates the sliding portion;
The sliding portion is a compression mechanism portion that compresses the refrigerant,
The compressor according to claim 1, wherein the support member is fixed to the frame.
3. The compressor according to claim 1, wherein the support portion of the support member includes an opening or a notch into which the second pipe is inserted and supports the oil drain pipe.
The support part of the support member includes an opening for inserting the second pipe and supporting the oil drain pipe,
The compressor according to claim 1 or 2, wherein the shape of the opening is a triangle or an ellipse.
The compressor according to any one of claims 1 to 4, wherein the oil drain pipe is made of copper, iron, or resin.
The compressor according to any one of claims 1 to 5, wherein the support member is made of metal or resin.
The support member is formed with a bolt fixing hole into which a bolt for fixing the frame and the support member is inserted,
The support part of the support member includes an opening for inserting the second pipe and supporting the oil drain pipe,
The shape of the bolt fixing hole and the shape of the opening are circular,
The bolt includes a screw portion inserted into the bolt fixing hole, and a head having an outer diameter larger than that of the screw portion,
The bolt fixing hole has a diameter larger than that of the screw portion and a diameter smaller than that of the head.
The compressor according to claim 2, wherein a difference between an outer diameter of the second pipe and a diameter of the opening is smaller than a difference between an outer diameter of the screw portion and a diameter of the bolt fixing hole.
The first pipe is
A linear first straight line portion;
A first bent portion having one end connected to the other end of the first straight portion;
One end is connected to the other end of the first bent portion, and is parallel to the support member, and a linear second straight portion;
The compressor according to any one of claims 1 to 7, further comprising: a second bent portion having one end connected to the other end of the second linear portion and the other end connected to the second pipe. .
The second pipe is formed with a smaller outer diameter than the first pipe,
The compressor according to any one of claims 1 to 8, wherein the support portion supports the oil drain pipe by being hooked at a connection portion between the first pipe and the second pipe.
The drainage pipe further includes a third pipe connected to the second pipe and through which the refrigerating machine oil flowing from the second pipe flows.
The second pipe is formed to have a larger outer diameter than the first pipe and the third pipe,
The compressor according to any one of claims 1 to 8, wherein the support portion supports the oil drain pipe by being hooked at a connection portion between the second pipe and the third pipe.
A sealed container containing an oil sump for storing refrigerating machine oil;
A sliding portion that is housed in the sealed container and slides during operation;
An oil drain pipe that is housed in the sealed container and returns excess refrigeration oil in the sliding portion from the sliding portion to the oil sump;
A plate-like support member fixed in the sealed container and supporting the oil drain pipe;
With
The oil drain pipe is
A linear first straight line portion;
A first bent portion having one end connected to the other end of the first straight portion;
One end is connected to the other end of the first bent portion, and is parallel to the support member, and a linear second straight portion;
A second bent portion having one end connected to the other end of the second straight portion,
The first straight portion is supported on the support member;
The second bending portion is inserted into the support member, and a restriction portion for restricting rotation about the first straight portion of the oil drain pipe is formed.