JP2021017853A - Compressor, outdoor unit and air conditioning device - Google Patents

Abstract

To provide a compressor and the like capable of sufficiently reducing the amount of refrigerating machine oil discharged to the external, while securing supply of the refrigerating machine oil to a necessary place.SOLUTION: A compressor includes a motor 40, a rotating shaft 31 driven by the motor and having an eccentric portion, a container disposed below the motor and having a compression chamber 51, a rotor disposed at the circumference of the eccentric portion and rotating in the compression chamber, a partition member kept into contact with the rotor and partitioning the compression chamber into two, and an elastic body pressing one end of the partition member. The container includes a side body 52 on which the partition member and the elastic body are mounted, and two bearings closing both ends of the compression chambers and rotatably supporting the rotating shaft. An upper bearing 53 at a motor side, of the two bearings has a spiral groove 56 for supplying an oil stored at a lower part of the container to an upper part, and an oil discharge hole 57 continued to the spiral groove for discharging the oil supplied through the spiral groove, and the oil discharge hole is inclined and extends downward to a space 32 between the motor and the container at the circumference of the rotating shaft.SELECTED DRAWING: Figure 3

Description

The present invention relates to a compressor for compressing a fluid, an outdoor unit and an air conditioner.

The rotary compressor houses an electric motor and a compression mechanism in a closed container, and compresses the fluid in the compression chamber by rotating a rotating body (roller) constituting the compression mechanism via a rotating shaft by the electric motor. Bearings that rotatably support the rotating shaft are provided above and below the compression mechanism.

Refrigerating machine oil used as lubricating oil is stored in the bottom of the closed container, sucked up through the inside of the rotating shaft, and supplied to the compression mechanism and the upper and lower bearings. The refrigerating machine oil supplied to the lower bearing returns directly to the oil sump at the bottom of the closed container, while the refrigerating machine oil supplied to the upper bearing is the fluid compressed by the compression mechanism between the motor and the compression mechanism. It is discharged upward into the discharge space.

Most of the refrigerating machine oil discharged into the discharge space falls and returns to the oil sump, but a part of the refrigerating machine oil is discharged to the outside of the closed container together with the high-pressure fluid discharged from the compression mechanism. When the amount of this discharged increases, the oil level in the oil sump decreases, and the reliability of the compressor decreases.

In view of such a problem, an annular groove is provided at the upper end of the upper bearing, an oil discharge hole extending radially from the annular groove is provided, the diameter of the oil discharge hole is made larger than the radial width of the annular groove, and the ring is formed. A technique has been proposed in which the passage resistance from the groove to the upper part to the oil discharge hole is reduced to reduce the amount of oil discharged to the outside (see, for example, Patent Document 1).

Japanese Patent No. 4992496

In the above-mentioned conventional technique, the amount of oil discharged to the outside is reduced by providing the oil discharge hole so as to be inclined downward, but the refrigerating machine oil is also discharged upward from the upper opening of the annular groove to the discharge space. Therefore, there is a problem that the amount discharged to the outside cannot be sufficiently reduced.

The present invention is a compressor that compresses a fluid in view of the above problems.
With an electric motor
A rotating shaft driven by an electric motor and having an eccentric part,
A container located below the electric motor and having a compression chamber for compressing the fluid,
A rotating body provided around the eccentric part and rotating in the compression chamber while contacting the inner peripheral surface of the compression chamber.
A partition member that comes into contact with the rotating body and divides the compression chamber into two spaces,
Including an elastic body that presses one end of the partition member
The container constitutes the side of the compression chamber, and includes a side body to which the partition member and the elastic body are mounted, and two bearings that close the openings at both ends of the compression chamber and rotatably support the rotating shaft. Including
Of the two bearings, the upper bearing on the motor side has a spiral groove for supplying the oil stored under the container upward and a spiral groove continuous with the spiral groove to discharge the oil supplied through the spiral groove. Provided is a compressor having an oil drain hole for the purpose of the oil drain hole extending downwardly toward the space between the electric motor and the container around the rotating shaft.

According to the present invention, it is possible to sufficiently reduce the amount of refrigerating machine oil discharged to the outside while ensuring the supply of refrigerating machine oil to necessary places.

The figure which showed the configuration example of the air conditioner. The figure which showed the configuration example of the outdoor unit. The figure which showed the configuration example of a compressor. The figure which showed the 1st example in the direction which the oil discharge hole extends. The figure which showed the 2nd example in the direction which the oil discharge hole extends. The figure which showed an example of the position of the oil discharge hole which is continuously provided in a spiral groove. The figure which showed the 4th example in the direction which the oil discharge hole extends. The figure which showed the 5th example in the direction which the oil discharge hole extends.

The compressor according to the present embodiment can be used alone as a device for compressing a fluid, and can be mounted on any device or system, but here, it is mounted on an outdoor unit of an air conditioner. explain.

FIG. 1 is a diagram showing a configuration example of an air conditioner. The air conditioner includes one or more indoor units installed in the same space and one or more outdoor units installed outside the space. The device illustrated in FIG. 1 is composed of one indoor unit 10 installed indoors and one outdoor unit 11 installed outdoors.

The indoor unit 10 and the outdoor unit 11 are connected by two pipes 12 and are configured so that the refrigerant circulates in the pipe 12. The refrigerant is a heat medium used for transferring heat, for example, hydrofluorocarbon (HFC) which is not affected by ozone layer depletion is used.

The indoor unit 10 sucks in the indoor air, cools or warms the indoor air with a circulating refrigerant, and blows out the cooled or warmed air. By repeating this, the room is cooled or warmed. The outdoor unit 11 supplies the refrigerant to the indoor unit, recovers the refrigerant from the indoor unit, heats or cools the refrigerant, and supplies the refrigerant to the indoor unit 10 again.

FIG. 2 is a diagram showing a configuration example of the outdoor unit 11. The outdoor unit 11 includes a fan 20 that sucks in and blows out outside air, a heat exchanger 21 that heats or cools the sucked air, a compressor 22 that circulates a refrigerant between the indoor unit 10 and the outdoor unit 11, and an outdoor unit. A control board 23 for controlling the machine 11 and an expansion valve 24 are provided. Further, the outdoor unit 11 includes a temperature sensor for measuring the outside temperature, a sensor for measuring the current supplied to the compressor 22, a sensor for measuring the flow rate of the refrigerant, a sensor for measuring the pressure of the refrigerant, a four-way valve, an accumulator and the like. ing.

The control board 23 operates or stops the outdoor unit 11 in response to an instruction from the indoor unit 10, and controls the fan 20 and the compressor 22 based on the notified information so that the indoor temperature reaches the set temperature. The operating load is changed to adjust the temperature of the refrigerant supplied to the indoor unit 10, the flow rate of circulating the refrigerant, and the like. The expansion valve 24 is used to expand the compressed refrigerant and lower the temperature of the refrigerant.

Here, the operation of the outdoor unit 11 in the air conditioner during operation will be briefly described. When the operation of the outdoor unit 11 is started, the compressor 22 is started, and the circulation of the refrigerant between the indoor unit 10 and the outdoor unit 11 is started.

When the air conditioner is used for cooling, when the compressor 22 compresses and discharges the refrigerant, the high temperature and high pressure refrigerant is supplied into the heat exchanger 21. The refrigerant exchanges heat with the outside air sucked by the fan 20 and is cooled. After cooling, the refrigerant is expanded by the expansion valve 24, the temperature drops, and the refrigerant is sent from the outdoor unit 11 to the indoor unit 10 through the pipe 12.

The indoor unit 10 includes a fan, a heat exchanger, and a control board, and a refrigerant is supplied into the heat exchanger to exchange heat with the air in the room sucked by the fan. The air is cooled by the refrigerant and blown into the room.

The refrigerant passes through the pipe 12 and is returned to the compressor 22. This operation is repeated, and the room is cooled to the set temperature with the blown cold air.

When the air conditioner is used for heating, the operation is the opposite of that for cooling. When the compressor 22 adiabatically compresses the refrigerant and discharges it in a high temperature and high pressure state, the room is passed through the pipe 12 instead of the heat exchanger 21. It is sent to the machine 10. In the indoor unit 10, a refrigerant is supplied into the heat exchanger and heat is exchanged with the indoor air sucked by the fan. The air is warmed by the refrigerant and blown into the room.

The refrigerant gives heat to the air to be cooled, and is sent to the outdoor unit 11 through the pipe 12. The outdoor unit 11 expands the high-pressure refrigerant condensed by the expansion valve 24. As a result, the refrigerant is in a low temperature and low pressure state. After that, it is supplied into the heat exchanger 21 and exchanged with the outside air sucked by the fan 20, and then returned to the compressor 22. This operation is repeated to warm the room to the set temperature with the warm air blown out.

FIG. 3 is a diagram showing a configuration example of the compressor 22. The compressor 22 is a rotary compressor having a small number of parts, and includes an electric motor 40 housed in a closed container 30 and a compression mechanism 50. The electric motor 40 is configured to rotationally drive the compression mechanism 50 via a rotating shaft 31, and includes a stator 41 and a rotor 42.

The stator 41 is composed of an iron core, a coil, or the like, and the rotor 42 includes a permanent magnet. An electromagnet is formed by passing an electric current through the coil of the stator 41, and the direction of the electric current is changed to form the rotor 42. Rotate. This is an example, and the stator 41 may include a permanent magnet, and the rotor 42 may be composed of an iron core, a coil, or the like.

The stator 41 is provided with an insulator (insulator) 43 for insulating the current so that it does not flow to other than the coil. The insulator 43 extends in the same vertical direction as the direction in which the rotating shaft 31 extends, and the length in the vertical direction is longer than that of the stator 41, and the lower end thereof is the lower end of the electric motor 40. Further, there is a gap between the closed container 30 and the stator 41 and between the stator 41 and the rotor 42. In addition to the above-mentioned gap, the electric motor 40 may be provided with a through hole connecting the primary space 32 and the secondary space 33 in order to slow down the flow velocity of the refrigerant.

The compression mechanism 50 is arranged below the electric motor 40 at a distance. The space between the electric motor 40 and the compression mechanism 50 is the primary space 32, and the space above the electric motor 40 is the secondary space 33. Refrigerating machine oil is stored in the lower part of the compression mechanism 50 as oil used for lubrication of each sliding portion of the compression mechanism 50 and sealing of a compression chamber described later.

The compressor 22 includes a gas-liquid separator 34 outside the closed container 30. The gas-liquid separator 34 is connected to the closed container 30, separates the liquid refrigerant, and supplies only the gas refrigerant into the closed container 30.

The refrigerant supplied into the closed container 30 enters the compression mechanism 50, is compressed, becomes a high-temperature, high-pressure refrigerant, and is discharged to the primary space 32. The rotating shaft 31 is driven by an electric motor 40 and has an eccentric portion. The eccentric portion has a disk shape attached so as to surround the circumference of the axis of the rotating shaft 31, and the center of gravity of the eccentric portion exists at a position deviated from the center of the axis.

The compression mechanism 50 is arranged below the electric motor 40 and is provided around a container having a compression chamber 51 for compressing the refrigerant and an eccentric portion of the rotating shaft 31, while contacting the inner peripheral surface of the compression chamber 51. A rotating body (roller) that rotates in the compression chamber 51 is included. Further, the compression mechanism 50 includes a partition member (vane) that comes into contact with the rollers and divides the compression chamber 51 into two spaces, and an elastic body that presses one end of the vanes. As the elastic body, for example, a spring can be used, but the elastic body is not limited to this, and may be rubber.

The container constitutes the side of the compression chamber 51, closes the side body (cylinder) 52 on which the vane and the spring are mounted, and the openings at both ends (upper and lower) of the compression chamber 51, and the rotating shaft 31 can rotate. Includes two bearings (upper bearing, lower bearing) 53, 54 supported by. The upper bearing 53 is provided with a silencer (silencer) 55 for muting the sound generated when the high-pressure refrigerant is discharged. The silencer 55 is provided with a hole through which the refrigerant passes. The high-pressure refrigerant compressed in the compression chamber 51 is discharged into the silencer 55, and is discharged into the primary space 32 through the hole provided in the silencer 55.

The refrigerant discharged into the primary space 32 flows into the secondary space 33 through the gap between the closed container 30 and the stator 41 and the gap between the stator 41 and the rotor 42. A discharge pipe 35 that connects the secondary space 33 and the outside is provided at the top of the closed container 30, and the refrigerant that has flowed into the secondary space 33 is discharged to the outside through the discharge pipe 35.

The refrigerating machine oil stored in the lower part of the compression mechanism 50 is provided with spiral blades (spiral shafts) in the shaft holes 36 formed in the longitudinal direction from the lower end of the rotating shaft 31, and the rotating shaft 31 and the spiral shaft have spiral blades. At least a part, the whole lower bearing 54, and at least a part of the cylinder 52 are immersed in the refrigerating machine oil. The spiral shaft rotates with the rotation of the rotating shaft 31, and the refrigerating machine oil is sucked up into the shaft hole 36.

The refrigerating machine oil sucked up in the shaft hole 36 is supplied between the rotating shaft 31 and the lower bearing 54, between the rotating shaft 31 and the roller, between the rotating shaft 31 and the upper bearing 53, and the like. The upper bearing 53 has a spiral groove 56 on the inner surface for supplying the refrigerating machine oil sucked up in the shaft hole 36 further upward. The spiral groove 56 supplies refrigerating machine oil between the rotating shaft 31 and the upper bearing 53, and excess oil is discharged to the outside of the upper bearing 53.

The upper bearing 53 has an oil discharge hole 57 for discharging excess oil. The oil discharge hole 57 is continuous with the spiral groove 56 and extends downwardly inclined toward the primary space 32. The refrigerating machine oil supplied through the spiral groove 56 is also supplied between the rotating shaft 31 at the upper end of the oil discharge hole 57 and the upper bearing 53, and the excess oil is discharged from the oil discharge hole 57.

The upper end portion of the upper bearing 53 is a portion where one-sided contact is likely to occur due to the runout of the rotating shaft 31. However, not all of the oil is discharged from the oil discharge hole 57, and the oil can be appropriately supplied to the upper end portion of the upper bearing 53. Therefore, the reliability of the upper end portion of the upper bearing 53 is not lost.

Further, since the oil discharge hole 57 extends downward to the primary space 32 between the electric motor 40 and the upper bearing 53, it expands in the radial direction of the silencer 55 and the upper bearing 53 below the oil discharge hole 57. It is discharged onto the closing portion that closes the upper opening of the cylinder 52, and is not discharged toward the upper electric motor 40. Therefore, the flow of the refrigerant moving from the primary space 32 to the secondary space 33 through the gap of the electric motor 40 (the gap between the closed container 30 and the stator 41, the gap between the stator 41 and the rotor 42, etc.) The amount of refrigerating machine oil released along can be reduced.

The refrigerating machine oil discharged onto the silencer 55 flows toward the edge on the closed portion of the circular upper bearing 54 when viewed from above, falls through the oil return hole provided at the edge, and falls at the bottom of the closed container 30. Return to the oil reservoir of refrigerating machine oil stored in.

Although a small amount of the refrigerating machine oil discharged from the oil discharge hole 57 is carried to the secondary space 33 together with the high-pressure refrigerant, it is discharged to the outside of the closed container 30. The flow path through which the refrigerant circulates is a closed space, and the refrigerating machine oil contained in the refrigerant returns to the compressor and is used to reduce friction when the rollers come into contact with the cylinder 52 or when the vanes slide. Will be done.

FIG. 4 is a diagram showing a first example in the direction in which the oil discharge hole 57 extends. The oil discharge hole 57 may be any hole as long as it is continuous with the spiral groove 56 and extends downward toward the primary space 32, but as shown in FIG. 4, the oil discharge hole 57 is a stator. It is desirable that the insulator 43 provided in 41 is opened downward from the lower end. This is because the refrigerating machine oil discharged from the oil discharge hole 57 can be prevented from adhering to the insulator 43 and carried to the secondary space 33 together with the high-pressure refrigerant.

It is more desirable that the oil discharge hole 57 is opened toward the closed portion of the upper bearing 53 and the silencer 55. If the opening is made between the closed portion of the upper bearing 53 and the lower end of the insulator 43, the refrigerating machine oil is discharged toward the inner surface of the closed container 30. There is a gap between the closed container 30 and the stator 41, and a high-pressure refrigerant flows through the gap. Then, the refrigerating machine oil adhering to the inner surface of the closed container 30 is carried to the secondary space 33 by the flow of the high-pressure refrigerant, and the amount of refrigerating machine oil returning to the oil sump is reduced.

FIG. 5 is a diagram showing a second example in the direction in which the oil discharge hole 57 extends. A substantially cross-shaped silencer 55 is provided on the closing portion 58 of the upper bearing 53. The silencer 55 reduces the noise of the high-pressure refrigerant when it is discharged from the compression chamber 51. The silencer 55 has a substantially cross shape in order to provide bolt holes for passing bolts for connecting the upper bearing 53 to the cylinder 52 and the like in the recesses 59 formed between the portions protruding in the four directions. This is because the aim is to improve the sound deadening effect by repeatedly compressing and expanding the flow path of the gas discharged from the compression mechanism 50. The silencer 55 has a refrigerant discharge hole 60 through which the refrigerant passes, and the refrigerant is discharged to the primary space 32 through the refrigerant discharge hole 60.

One or more oil return holes 61 are provided at the edge of the closed portion 58 of the upper bearing 53, and the refrigerating machine oil discharged from the oil discharge hole 57 flows over the silencer 55 and the closed portion 58 and flows through the oil return hole. It falls from 61 to the oil sump.

The silencer 55 is inclined downward from the central portion toward the edge portion, and the closed portion 58 is also inclined downward from the central portion toward the edge portion. Therefore, no matter where the refrigerating machine oil falls, it can be guided toward the edge of the closing portion 58. Therefore, the oil discharge hole 57 needs to be inclined downward toward the primary space 32 in the vertical direction, but may extend in any direction in the horizontal direction.

However, when the refrigerating machine oil is discharged onto the silencer 55, it is separated into oil flowing on the silencer 55 and oil flowing down to the recesses 59 on both sides of the silencer 55 and flowing through each recess 59, and the range in which the refrigerating machine oil flows is widened. It takes time to collect the refrigerating machine oil in the oil sump. During that time, the oil level in the oil sump drops, the amount of oil sucked up into the shaft hole 36 decreases, and an appropriate amount of refrigerating machine oil cannot be supplied to each location.

Therefore, the oil discharge hole 57 can be provided so that the direction extending in the horizontal direction extends toward any one of the four recesses 59. As a result, the range in which the refrigerating machine oil flows can be limited, and the discharged refrigerating machine oil can be quickly recovered in the oil sump.

FIG. 6 is a diagram showing an example of the positions of oil discharge holes continuously provided in the spiral groove. The oil discharge hole 57 is provided continuously in the spiral groove 56 on the upper side of the upper bearing 53 as much as possible. The diameter of the oil discharge hole 57 is preferably larger than the width of the spiral groove 56. This limits the amount of refrigerating machine oil supplied between the upper bearing 53 and the rotating shaft 31 above the connecting portion between the oil discharge hole 57 and the spiral groove 56, and is discharged from the upper end portion of the upper bearing 53. This is to reduce the amount of refrigerating machine oil carried to the secondary space 33.

Since the rotation shaft 31 rotates in a predetermined direction, the position of the oil discharge hole 57 in the portion continuous with the spiral groove 56 is preferably a position behind the center of the width of the spiral groove 56 with respect to the rotation direction. The spiral groove 56 is formed with the inner surface of the upper bearing 53 spirally formed in a direction opposite to the rotation direction of the rotating shaft 31 from the lower end portion to the upper end portion. Therefore, the position behind the center of the width of the spiral groove 56 is a position closer to the side where the spiral groove 56 is formed toward the upper end portion than the center. In the example shown in FIG. 6, the rotation shaft 31 rotates in the direction indicated by the arrow A, and an oil discharge hole 57 continuous with the spiral groove 56 is provided at a position closer to the direction opposite to the direction indicated by the arrow A. ing.

Since the refrigerating machine oil that rises through the spiral groove 56 moves in the direction opposite to the rotation direction of the rotating shaft 31, the oil discharge hole 57 is provided at a position rearward from the center of the width of the spiral groove 56. It becomes easier to enter the oil discharge hole 57. Therefore, more refrigerating machine oil can be discharged from the oil discharge hole 57, and the amount of refrigerating machine oil discharged from the upper end portion of the upper bearing 53 can be reduced.

FIG. 7 is a diagram showing a third example in the direction in which the oil discharge hole 57 extends. Similar to the example shown in FIG. 5, FIG. 7 also illustrates the direction in which the oil discharge hole 57 extends in the horizontal direction. The oil discharge hole 57 extends above one of the portions of the substantially cross-shaped silencer 55 projecting in four directions so as to discharge the refrigerating machine oil. Here, the oil discharge hole 57 extends over the protruding portion of the silencer 55 so as to discharge the refrigerating machine oil, but the present invention is not limited to this, and the oil discharge hole 57 may extend toward the recess 59.

In this example, the oil return hole 61 does not exist at the edge of the closed portion 58 of the upper bearing 53 in the direction in which the oil discharge hole 57 extends. For this reason, the refrigerating machine oil collides with the wall provided on the outer peripheral portion on the outer peripheral side of the edge portion, splits into two hands, moves in the circumferential direction along the wall surface, falls from the nearby oil return hole 61, and oil. It will return to the pool. By dividing into two, the amount of refrigerating machine oil flowing to one side decreases, the flow velocity becomes slower, and it takes time to collect the refrigerating machine oil in the oil sump.

Therefore, the above wall is provided with a convex portion toward the central portion where the rotation shaft 31 exists, and is used as a guide wall 62 for guiding the wall to flow in one direction. The guide wall 62 has a surface inclined with respect to the direction in which the oil discharge hole 57 extends. The surface is not limited to a flat surface and may be a curved surface.

In the example shown in FIG. 7, the refrigerating machine oil discharged from the oil discharge hole 57 collides with the guide wall 62, flows in the direction indicated by the arrow line B, and returns to the oil sump through the oil return hole 61. By inducing the refrigerating machine oil to flow to only one side in this way, the refrigerating machine oil can be recovered quickly.

FIG. 8 is a diagram showing a fourth example in the direction in which the oil discharge hole 57 extends. A cylinder 52 exists below the upper bearing 53, and the cylinder 52 includes a vane 63 that abuts on an eccentric rotating roller and divides the compression chamber 51 into two. The cylinder 52 is provided with an elastic body that presses the back surface of the other end so that the tip end of the vane 63 is always brought into contact with the roller. The elastic body may be rubber, but is, for example, a coil spring.

Since the vane 63 maintains contact with the roller by sliding, the portion where the vane 63 and the cylinder 52 are in contact with each other is rubbed, and the frictional resistance gradually increases. Therefore, in order to suppress an increase in frictional resistance, it is necessary to supply refrigerating machine oil to the sliding portion. The sliding portion is continuous with the spring hole in which the coil spring is housed.

Therefore, an opening 64 connected to the spring hole is provided below the oil return hole 61, and an oil discharge hole 57 is provided so that the refrigerating machine oil is discharged toward the oil return hole 61. In the example shown in FIG. 8, the oil discharge hole 57 extends in the radial direction of the upper bearing 53 toward one of the protrusions of the silencer 55, and the oil return hole 61 flows through the upper portion of the protrusion. Is present, and the above-mentioned opening 64 is provided directly below the oil return hole 61.

Therefore, the refrigerating machine oil that has fallen through the oil return hole 61 enters the spring hole through the opening 64 and is supplied to the sliding portion where the vane 63 and the cylinder 52 are in contact with each other. As a result, the frictional resistance of the sliding portion can be reduced.

In this way, by reducing the amount of refrigerating machine oil released to the refrigerating cycle outside the compressor together with the refrigerant, the efficiency of the refrigerating cycle can be improved and the reliability of the compressor can be improved.

Although the compressor, outdoor unit and air conditioner of the present invention have been described in detail with the above-described embodiments, the present invention is not limited to the above-described embodiments, and other embodiments and additions have been made. , Changes, deletions, etc., can be made within the range that can be conceived by those skilled in the art, and are included in the scope of the present invention as long as the actions and effects of the present invention are exhibited in any of the embodiments.

10 ... Indoor unit 11 ... Outdoor unit 12 ... Piping 20 ... Fan 21 ... Heat exchanger 22 ... Compressor 23 ... Control board 24 ... Expansion valve 30 ... Sealed container 31 ... Rotating shaft 32 ... Primary space 33 ... Secondary space 34 ... Gas-liquid separator 35 ... Discharge pipe 36 ... Shaft hole 40 ... Electric motor 41 ... Stator 42 ... Rotor 43 ... Insulator 50 ... Compression mechanism 51 ... Compression chamber 52 ... Cylinder 53 ... Upper bearing 54 ... Lower bearing 55 ... Silencer 56 ... Spiral groove 57 ... Oil discharge hole 58 ... Closed part 59 ... Recess 60 ... Refrigerant discharge hole 61 ... Oil return hole 62 ... Guide wall 63 ... Vane 64 ... Opening

Claims (8)

A compressor that compresses fluid
With an electric motor
A rotating shaft driven by the electric motor and having an eccentric portion,
A container located below the electric motor and having a compression chamber for compressing the fluid.
A rotating body provided around the eccentric portion and rotating in the compression chamber while contacting the inner peripheral surface of the compression chamber.
A partition member that comes into contact with the rotating body and divides the compression chamber into two spaces.
Including an elastic body that presses one end of the partition member
The container constitutes a side of the compression chamber, closes the side body on which the partition member and the elastic body are mounted, and the openings at both ends of the compression chamber, and rotatably supports the rotation shaft. Including two bearings
Of the two bearings, the upper bearing on the motor side is continuously supplied to the spiral groove and the spiral groove for supplying the oil stored under the container upward, and is supplied through the spiral groove. A compressor having an oil discharge hole for discharging oil, and the oil discharge hole extending downward so as to a space between the electric motor and the container around the rotation shaft. The compressor according to claim 1, wherein the opening of the oil discharge hole facing the space between the electric motor and the container is located below the lower end of the electric motor. Includes a silencer attached to the upper bearing to mute the sound generated by the discharge of the fluid.
The silencer has two or more protrusions extending in the radial direction of the upper bearing and one or more recesses formed between the protrusions.
The compressor according to claim 1 or 2, wherein the oil discharge hole extends toward one of the one or more recesses. The compressor according to any one of claims 1 to 3, wherein the oil discharge hole is provided at a position on the side opposite to the rotation direction of the rotation shaft from the center of the width of the spiral groove. The compressor according to any one of claims 1 to 4, wherein the upper bearing has a guide wall on the outer peripheral portion that guides the oil discharged from the oil discharge hole to flow in a predetermined direction. The side body has an accommodating groove in which the partition member is slidably accommodated.
The upper bearing has an oil return hole formed on the accommodating groove and has an oil return hole.
The compressor according to any one of claims 1 to 4, wherein the oil discharge hole extends in the direction in which the oil return hole exists. An outdoor unit including the compressor according to any one of claims 1 to 6. An air conditioner comprising the compressor according to any one of claims 1 to 6.