KR20170062124A - Oil separator and air-conditioner using the same - Google Patents

Abstract

The present invention relates to an oil separator and an air conditioner using the oil separator. In the present invention, since the internal space of the oil separator is partitioned to form the noise reduction chamber, it is possible to prevent the pulsation of the compressor from being transmitted to the indoor unit. Therefore, there is an advantage in that the space utilization of the outdoor unit can be improved because no separate muffler is provided,

Description

Technical Field [0001] The present invention relates to an oil separator and an air conditioner using the oil separator.

The present invention relates to an outdoor unit of an air conditioner.

The air conditioner is an appliance for keeping the indoor air in the most suitable condition according to the purpose and purpose. For example, in the summer, the room is controlled by a cool air condition, while in winter the room is controlled by a warm heating condition, by the humidity of the room, and by the clean air of the room.

The air conditioner may be divided into a separate type air conditioner in which the indoor unit and the outdoor unit are separated from each other and an integrated type air conditioner in which the indoor unit and the outdoor unit are combined into one unit depending on whether the indoor unit and the outdoor unit are separated.

According to the installation state of the air conditioner, the air conditioner can be divided into a wall-mounted type air conditioner and a frame type air conditioner, which are mounted on the wall, and a slim type air conditioner configured to stand on the living room. In addition, a single type air conditioner configured to be able to drive one indoor unit according to the capacity of the indoor unit and configured to be used in a narrow place such as a home, and a large-sized air conditioner And a multi-air conditioner having a capacity capable of sufficiently driving a plurality of indoor units.

In the air conditioner, a refrigeration cycle is driven. The apparatus for driving the refrigeration cycle includes a compressor for compressing the refrigerant, a condenser for condensing the refrigerant compressed in the compressor, an expansion device for expanding the refrigerant through the condenser, and an evaporator for evaporating the refrigerant through the expansion device .

On the other hand, the air conditioner may further include an oil separator. The oil separator separates the oil from the refrigerant discharged from the compressor and returns the separated oil to the compressor to prevent the refrigerant used for driving the compressor from circulating in the refrigeration cycle.

In the compressor, the gaseous refrigerant is compressed to a high temperature and a high pressure. It is common for these noises to have a frequency band of 200 Hz to 5 KHz.

Noise in the frequency band above 1 KHz can be blocked by a sound absorbing material, but noise in the frequency band below 1 KHz is limited to be blocked by the sound absorbing material. Accordingly, there is a problem that the user feels inconvenience due to the noise generated in the compressor.

Particularly, since the refrigerant compressed in the compressor is directly introduced into the outdoor heat exchanger during the heating operation, the pressure pulsation generated in the compressor is transmitted to the indoor unit along the pipe and the noise of the compressor installed in the outdoor unit is transmitted to the indoor unit there was.

For this purpose, there has been an attempt to reduce noise transmitted by installing a muffler in a pipe connected from an outdoor unit to an indoor unit.

The prior literature related to this is as follows.

Application number (filing date): 10-2006-0002462 (Jan. 09, 2006)

Title of the Invention: Silencer of air conditioner

However, since the muffler includes a plurality of spaces varying in volume for noise prevention, the muffler is bulky, and there is a problem in securing the installation space in the outdoor unit, and the manufacturing cost is increased.

Meanwhile, since the oil separator separates the oil using the difference in specific gravity between the refrigerant and the oil, it is necessary to provide a space in which the refrigerant and the oil can be separated and stored. Therefore, the oil separator occupies a large volume in the outdoor unit.

As a result, when the muffler and the oil separator are separately provided in the outdoor unit, the volume of the outdoor unit can be increased, the arrangement with other components in the outdoor unit becomes complicated, the utilization of the space inside the outdoor unit is limited, Lt; / RTI >

SUMMARY OF THE INVENTION The present invention has been proposed in order to solve such problems, and it is an object of the present invention to appropriately reduce noise generated in a compressor.

It is an object of the present invention to improve the space utilization of an air conditioner by implementing an apparatus for reducing compressor noises and an oil separator as one unit.

It is another object of the present invention to provide an oil separator capable of preventing the oil from being accumulated in the oil separator even if the compressor noise reduction device is installed in the oil separator.

An air conditioner according to an aspect of the present invention includes: a housing defining a space through which refrigerant and oil flow; And a partition portion that is located inside the housing and that defines the space portion, wherein the space portion includes: a first space portion; And a second space portion separated from the first space portion, wherein the first space portion and the second space portion may form a noise reduction chamber for reducing noise of the refrigerant.

In addition, the refrigerant and oil guided by the inlet pipe may be introduced into the first space portion located below the partition portion.

In addition, the volume of the first space part is larger than the volume of the second space part, so that the first space part attenuates the noise of the low frequency band, and the second space part attenuates the noise of the high frequency band.

The refrigerant pipe may include a connection pipe passing through the partition and transferring the refrigerant in the first space to the second space.

The connection pipe may include a first connection pipe extending from the partition to the first space and spaced below the oil return pipe and a second connection pipe communicating with the first connection pipe, And a second connection pipe extending to the upper portion of the refrigerant outlet pipe.

In addition, the housing may include a body portion; An upper surface portion; And the bottom surface of the main body portion, the inflow pipe passes through the outer peripheral surface of the main body portion, the oil return pipe is connected to the lowermost side of the bottom portion, and the refrigerant outlet pipe is connected to the recoil side of the top surface portion.

The inflow pipe may include an external inflow pipe and an internal inflow pipe, and the inflow pipe may include a bent portion for changing the direction of the external inflow pipe. The inflow pipe may be formed on the inner peripheral surface of the main body portion It can be bent to be tangential.

Also, at the end of the internal inflow pipe, irregularities including mountains and valleys may be formed.

The through hole may pass through the partition and move the oil separated in the second space to the first space.

The height of the second space may be shorter than 3/8 of the diameter of the housing, and the length of the first connection pipe may be shorter than 2/3 of the diameter of the housing.

According to the present invention, since the noise can be reduced through the internal space of the oil separator, the pulsation generated in the compressor can be reduced.

Particularly, the inner space of the oil separator can be divided through the partition to reduce the noise in the high frequency range as well as the noise in the low frequency range.

Furthermore, noise can be reduced without a separate configuration of a muffler or the like, so that the size of the outdoor unit can be reduced and the production cost can be reduced.

In addition, since the direction of the refrigerant flowing into the oil separator is different from the direction of the refrigerant flowing out of the oil separator, noise can be reduced by extending the transmission path of the noise.

Further, the oil separator can form a concavo-convex portion including an acid and a bone at the end of the inflow pipe through which the refrigerant and the oil flow, thereby preventing noise caused by resonance.

Further, a penetration portion is provided in the partition portion for dividing the internal space. It is possible to prevent oil from accumulating inside the oil separator.

Further, the height of the inner space through the partition and the length of the coupling pipe passing through the partition can be adjusted to change the characteristics of the noise attenuation.

1 is a perspective view illustrating an outdoor unit of an air conditioner according to an embodiment of the present invention.
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner, and more particularly,
3 is a perspective view illustrating an oil separator of an air conditioner according to an embodiment of the present invention.
4 is a sectional view taken along line A-A 'in Fig. 3;
5 is a diagram illustrating transmission loss of an air conditioner according to an embodiment of the present invention.

FIG. 1 is a perspective view illustrating an outdoor unit of an air conditioner according to an embodiment of the present invention, and FIG. 2 is a configuration diagram illustrating a configuration of an air conditioner and a flow of a refrigerant according to an embodiment of the present invention.

1 and 2, an air conditioner according to an embodiment of the present invention includes an outdoor unit 10 that performs heat exchange with outdoor air, and an indoor unit (not shown) disposed in the indoor space to harmonize indoor air .

The outdoor unit (10) includes a case (11) which forms an appearance and contains a large number of parts. The case 11 includes a suction unit (not shown) for sucking outdoor air and a discharge unit 12A for discharging the sucked air after heat exchange. The discharge portion 12A may be formed in front of the case 10.

A compressor 20, a flow switching unit 30, an outdoor heat exchanger 50, an outdoor solenoid valve 60, a gas-liquid separator 80, and a plurality of refrigerant pipes are provided in the case 10 .

The outdoor unit 10 includes a compressor 20 for compressing a refrigerant and an oil separator 100 disposed at an outlet side of the compressor 20 for separating oil from refrigerant discharged from the compressor 20 do. Details of the oil separator 100 will be described later.

A flow switching unit 30 for guiding the refrigerant discharged from the compressor 20 to the outdoor heat exchanger 50 or an indoor unit (not shown) is provided at the outlet side of the oil separator 100. For example, the flow switching unit 30 may include a four-way valve.

The flow switching unit 30 includes a first connection pipe 41 connected to the outdoor heat exchanger 50, a second connection pipe 42 connected to the gas-liquid separator 80, To the third connection pipe 43 connected to the second connection pipe 43.

When the air conditioner performs the cooling operation, the refrigerant flows from the flow switching unit 30 to the outdoor heat exchanger 50 through the first connection pipe 41. On the other hand, when the air conditioner performs the heating operation, the refrigerant flows from the flow switching unit 30 to the indoor heat exchanger side of the indoor unit (not shown) through the third connection pipe 43.

The outdoor heat exchanger 50 exchanges heat between the outside air and the refrigerant. The outdoor heat exchanger 50 functions as a condenser when the air conditioner performs cooling operation, and as an evaporator when the air conditioner performs heating operation.

When the air conditioner performs the cooling operation, the refrigerant passing through the outdoor heat exchanger (50) passes through the expansion valve (60). That is, the expansion valve (60) can be disposed on the outlet side of the outdoor heat exchanger (50) on the basis of the cooling operation. During the cooling operation, the expansion valve (60) is fully opened and does not perform the decompression action of the refrigerant.

The refrigerant that has passed through the expansion valve 60 flows into the indoor unit through the first indoor pipe 70 and the refrigerant evaporated in the indoor heat exchanger flows through the second indoor pipe 71 to the outdoor unit 10. [ Lt; / RTI >

The refrigerant flowing into the outdoor unit flows into the flow switching unit 30 through the third connection pipe 43 and flows out from the flow switching unit 30 through the second connection pipe 42.

The refrigerant that has passed through the flow switching unit (42) flows to the gas-liquid separator (80). The gas-liquid separator 80 separates the gaseous refrigerant before the refrigerant flows into the compressor 20. The separated gaseous refrigerant can be introduced into the compressor (20).

FIG. 3 is a perspective view illustrating an oil separator of an air conditioner according to an embodiment of the present invention, and FIG. 4 is a sectional view taken along line A-A 'of FIG.

3 and 4, an air conditioner according to an embodiment of the present invention includes an oil separator 100.

The oil separator 100 separates the oil from the refrigerant discharged from the compressor 20 and returns the oil to the compressor 20 so that the oil can be prevented from flowing into the refrigeration cycle, .

The oil separator 100 includes a housing 110 having an internal space for storing oil.

Specifically, the housing 110 includes a main body portion 112 having an approximately cylindrical shape with upper and lower openings. The body portion 112 includes an outer peripheral portion having a set curvature.

The housing 110 further includes a top surface 111 provided on the upper side of the main body 112. A refrigerant outlet pipe 153, which will be described later, is fastened to the upper surface portion, and is formed to extend downwardly from a portion where the refrigerant outlet pipe 153 is coupled.

For example, the upper surface portion 111 may have a funnel shape in which the cross-sectional area thereof increases as it goes downward from the refrigerant outflow pipe 153.

The housing 110 further includes a bottom portion 113 provided on the lower side of the main body portion 112. An oil return pipe 154, which will be described later, is coupled to the bottom portion 113, and the oil return pipe 154 is inclined upwardly from a portion to which the oil return pipe 154 is coupled.

For example, the bottom portion 113 may have a funnel shape that increases in cross-sectional area as it goes upward from the oil return pipe 154.

Therefore, the oil separator 100 may include an inner space surrounded by the upper surface portion, the main body portion, and the lower surface portions 111, 112, and 113. The refrigerant and the oil are stored in the inner space, and the oil can be stored on the lower side and the refrigerant can be separately stored on the upper side by the difference in specific gravity.

The oil separator 100 includes a refrigerant outlet 115 provided at the uppermost portion of the upper surface portion, an oil recovery port 116 provided at the lowermost portion of the lower surface portion, and an inlet port 114 disposed in the main body portion can do.

The refrigerant outflow pipe 154, the oil return pipe 153 and the inflow pipe 151 are coupled to the refrigerant outflow port 115, the oil return port 116 and the inlet port 114, respectively, So that the refrigerant and the oil can flow into the internal space of the compressor.

At this time, the internal space can be driven by a noise reduction chamber capable of attenuating pulsation generated in the compressor. Details will be described later.

The refrigerant and the oil are stored in the inner space, and the oil can be stored on the lower side and the refrigerant can be separately stored on the upper side by the difference in specific gravity.

The oil separator 100 includes an inlet pipe 150 for introducing the refrigerant compressed by the compressor 20 into the oil separator 100. At this time, the lubricating oil in the compressor (20) may leak from the compressor to the inlet pipe (150).

The inlet pipe 150 extends from the compressor 20 and extends to the inside of the oil separator 100 by being bent to pass through the inlet 114 provided in the body portion 112.

The inflow pipe 150 is connected to an external inflow pipe 151 disposed on the outside of the main body part 112 and an internal inflow pipe 151 connected to the external inflow pipe 151, (152).

The outer inflow pipe 151 is provided with a first part 161 extending from the compressor 20, a bent part 162 extending from the first part 161 and bent from the bent part 162, And a second part 163 connected to the part 112.

The first part 161 may extend in the vertical direction, and the second part 163 may extend in the horizontal direction. The bent portion 162 is provided between the first and second parts 161 and 163 and switches the extending direction of the external inflow pipe 151 from the vertical direction to the horizontal direction.

For example, when the first part 161 is disposed in parallel with the main body part 112, the bending pipe 162 is arranged such that the second part 163 is perpendicular to the main body part 112 can do.

Since the bending pipe 162 shifts the direction in which the refrigerant flows in the oil separator 100 and the direction in which the refrigerant is discharged, the flow direction of the noise and the traveling direction of the refrigerant in the oil separator 100 It is possible to arrange them in a shifted manner, thereby making it possible to reduce the noise primarily.

More specifically, as shown in the drawing, the refrigerant flowing in the inflow pipe 150 is discharged in a lateral direction through an internal inflow pipe 152, which will be described later, and the pulsation sound generated in the compressor, The inner space is reflected in the lateral direction.

On the other hand, since the refrigerant outflow pipe and the oil return pipe through which the refrigerant flows are formed to extend in the longitudinal direction from the uppermost or lowermost side of the internal space, sound waves including pulsation sound reflected in the longitudinal direction, It is restricted from being transmitted through the recovery pipe.

The internal inflow pipe 152 discharges the refrigerant introduced through the inflow pipe to the internal space of the main body part. In this respect, it can be called 'discharge part'.

The internal inflow pipe 152 extends from the second part 163 and can be accommodated in the oil separator 100.

The internal inlet pipe 152 includes an end portion 165 that is inclined with respect to the flow direction of the refrigerant. That is, one end of the end portion may be formed to extend beyond the other end portion of the end portion.

More specifically, a first direction in which the end portion 165 extends is configured to intersect with a second direction in which the internal inflow pipe 152 extends. For example, the angle at which the first and second directions intersect may be less than 90 degrees.

For example, when the internal inflow pipe 152 is a circular pipe, the end portion may be formed in an elliptical shape.

The end portion may be formed so as to face the inner circumferential surface of the main body portion 112, and one end of the end portion of the inner inflow pipe may be configured to contact the main body portion 112.

In such a configuration, the refrigerant discharged from the internal inflow pipe 152 flows in contact with the inner circumferential surface of the main body portion 112 and rotates along the inner circumferential surface of the curved main body portion 122, Can happen.

In addition, irregularities including mountains and valleys may be formed at the ends. In another aspect, the end portion may be configured to have a saw tooth shape.

This is to prevent resonance from occurring at the end portion due to the discharged high-speed refrigerant and noise due to resonance.

The oil separator 100 further includes a refrigerant outflow pipe 153 coupled to the refrigerant outlet 115 and an oil recovery pipe 153 coupled to the oil recovery port 116.

The refrigerant outflow pipe 153 flows only the refrigerant from which the oil has been removed. The refrigerant outflow pipe 153 may extend from the oil separator 100 to the flow switching unit 30 and may be located above the oil separator 100 to allow the gaseous refrigerant to flow out.

The oil return pipe 154 recovers the oil separated from the oil separator 100 to the compressor 20 again. The oil return pipe 154 extends from the oil separator 100 to the compressor 20 so that the oil accumulated under the oil separator 100 can be recovered.

Since the specific gravity of the oil is higher than that of the gaseous refrigerant, it is stored in the lower side, and the gaseous refrigerant is stored on the upper side because the specific gravity is lower than that of the oil. Accordingly, the refrigerant outlet pipe 153 is connected to the refrigerant outlet 115 provided at the upper side, and the oil return pipe 154 is connected to the oil return port 116 provided at the lower side.

The oil separator 100 includes a partition 118 for partitioning the inner space. The partition 118 may be formed in a circular plate shape corresponding to the cross section of the oil separator 100 and the rim of the partition 118 may be in contact with the inner circumferential surface of the main body.

That is, the partition 118 may extend from one point on the inner circumferential surface of the housing to another point on the inner circumferential surface of the housing.

The partition 118 divides the internal space into a first space 130 and a second space 131. Thus, the noise reduction chamber is individually provided.

The first space 130 is a space located below the partition 118 and is a space between the bottom 113 and the partition 118. The second space 131 is a space between the bottom 113 and the partition 118, And a space between the upper surface portion 111 and the partitioning portion 118. The space between the upper surface portion 111 and the partitioning portion 118 is a space located on the upper side of the partitioning portion 118. [

The partition 118 may be formed such that the first and second spaces 130 and 131 have different heights. For example, the first space 130 may be larger than the second space 131.

In this case, the first space 130 having a large volume is a noise reduction chamber for reducing the low frequency component of the pulsation, and the second space 131 having a small volume has high frequency components of the pulsation It is a noise reduction room.

In addition, the partition 118 may be formed on the upper side of the inlet 114. Therefore, the refrigerant in the inlet pipe 150 can be introduced into the first space 130.

The oil separator 100 may further include coupling pipes 155 and 156 that pass through the partition 118 and allow the space 130 and 131 to communicate with each other.

The connection pipes 155 and 156 are connected to the first connection pipe extending downward with respect to the partitioning part 118 and the second connection pipe extending upward from the partitioning part 118, Lt; / RTI > The first connection pipe and the second connection pipe may have the same diameter and may be formed of one pipe.

The first connection pipe 155 may be positioned so as to correspond to the oil return pipe 154 in the vertical direction and the second connection pipe 156 may be positioned vertically As shown in FIG.

The refrigerant in the first space 130 may be transferred to the second space 131 through the connection pipes 155 and 156. That is, the refrigerant in the first space 130 may be sucked into the first connection pipe 155, and may be discharged to the second connection pipe 156 to be moved to the second space 131.

Here, the noise that has not been removed from the first space 130 may be transmitted to the second space 131 through the coupling pipes 155 and 156.

At this time, since the cross-sectional area of the second space 131 is larger than the cross-sectional area of the coupling pipes 155 and 156, noise is dispersed in the second space 131, It is reflected repeatedly inside the part 131 and disappears. On the other hand, the refrigerant moved through the connecting pipes 155 and 156 may flow to the flow switching unit 30 through the refrigerant outlet pipe 153.

At this time, the length of the first connection pipe 155 extending downward from the partitioning part 118 and the height of the second space 131 located above the partitioning part 118 are specified to be attenuated . Details of this will be described later.

The partitioning part 118 includes a penetrating part 138 passing through the partitioning part,

The penetration portion 138 is at least one hole penetrating the partition portion 118. The penetration portion 138 is formed in the first space portion 130 and the oil located in the second space portion 131 . The plurality of penetrating portions 138 may be symmetrical with respect to the connecting pipes 155 and 156.

The penetration part 138 is formed so that the oil moved into the second space part 131 without being separated in the first space part 130 is separated from the lower part of the second space part 131, So that the oil does not accumulate in the oil separator 100.

Hereinafter, the flow of refrigerant and oil flowing through the oil separator 100 will be described.

First, the refrigerant is compressed in the compressor (20) and flows through the inflow pipe (150). At this time, the oil in the compressor 20 can flow out like the refrigerant.

The refrigerant and oil flowing through the inlet pipe 150 are bent at the bending pipe 151 and pass through the body portion 112 of the oil separator, (Not shown).

The refrigerant and the oil discharged from the internal inflow pipe 152 flow into the internal space of the first space part 130 and rotate along the inner circumferential surface of the main body part 112.

At this time, since the oil has a large specific gravity, it is moved downwardly of the first space part, and the refrigerant can be moved upward of the first space part because the specific gravity is small. On the other hand, the sound waves including the pulsating sound proceed in the discharge direction irrespective of the density, are repeatedly reflected inside the first space part, and gradually attenuated in size. Since the first space portion has a larger volume than the second space portion, there is an effect of improving the low frequency performance of the noise.

The oil accumulated below the first space portion flows to the oil return pipe 154 through the oil return port 116 provided in the lower portion 113 of the first space portion. The oil that has flowed into the oil return pipe (154) is again returned to the compressor (20).

The refrigerant moved upward of the first space part passes through the partitioning part 118 through the first and second connection pipes 155 and 156 and is discharged to the second space part 131. At this time, the oil not separated in the first space portion and the sound wave not attenuated in the first space portion can be moved to the second space portion like the refrigerant.

The refrigerant moved to the second space part is moved upward and flows to the flow switching part 30 through the refrigerant outflow port 115. [

The oil not separated in the first space part can be separated from the second space part and is accumulated on the upper surface of the partition part 118 and moves again to the first space part through the penetration part 138. [ In addition, the pulsation including the high-frequency component not attenuated in the first spatial part is dispersed and repeatedly reflected inside the second spatial part to reduce its size.

6 shows the noise attenuation performance according to the diameter A of the oil separator, the height B of the second space, and the length C of the first connection pipe.

Here, the transmission loss means the amount of noise that is lost due to the noise transmitted through the medium. Thus, the larger the transmission loss, the better the noise reduction performance. Further, the oil separation rate means the amount of oil recovered in the oil separator relative to the amount of oil flowing out of the compressor. Within the air conditioner, the separation rate of the oil separator should be about 90% or greater so that the desired oil separation performance can be achieved. Experiments were performed on the basis of the diameter (A) of the oil separator, the height (B) of the second space portion, and the length (C) of the first connection pipe. The results of the experiment are shown in Table 1 and FIG.

case Diameter of oil separator (A) [mm] Height (B) of the second space [mm] Length of first connection pipe (C) [mm] Oil separation rate One 75 48 26 91.9 2 75 68 26 91.0 3 75 48 36 95.0 4 75 68 36 78.7

Referring to FIG. 6, the main pulsation noise generated in the compressor is distributed from approximately 70 Hz to 230 Hz. When two mufflers are installed, the transmission loss is increased in the low-frequency region and the high-frequency region with a specific frequency as the reference (about 70 Hz in the drawing).

If the oil separator 100 is constructed as shown in Table 1, it can be seen that transmission loss increases in both the low frequency region and the high frequency region based on a specific frequency for each case.

Especially, in the low frequency band below 120Hz, the transmission loss is larger than when two mufflers are installed. This means that the oil separator 100 exhibits better noise canceling performance than the case where the oil separator 100 has two mufflers in a low frequency band of 120 Hz or less.

At this time, the height (B) of the second space portion may be shorter than 3/8 of the diameter (A) of the oil separator, and the length (C) of the first connection pipe may be shorter than the diameter / 2 "

Claims (17)

A housing defining a space through which refrigerant and oil flow;
An inlet pipe coupled to the first side of the housing and guiding the refrigerant and oil discharged from the compressor to the housing;
An oil return pipe coupled to a second side of the housing and discharging oil separated from the space;
A refrigerant outlet pipe connected to the third side of the housing and discharging the refrigerant separated in the space portion; And
And a partitioning portion located inside the housing for partitioning the space portion,
In the space portion,
A first space formed on one side of the partition; And
And a second space part separated from the first space part and formed on the other side of the partition part,
Wherein the first space portion and the second space portion form a noise reduction chamber for reducing noise of the refrigerant.
The method according to claim 1,
Wherein the partition extends from one point on the inner circumferential surface of the housing to another point on the inner circumferential surface of the housing.
3. The method of claim 2,
The partition part divides the first space part and the second space part into upper and lower parts,
And the refrigerant and oil flowing into the inlet pipe are introduced into the first space portion.
The method of claim 3,
And the volume of the first space portion is formed larger than the volume of the second space portion.
5. The method of claim 4,
Wherein the first space portion attenuates noise of the first band, the second space portion attenuates the noise of the second band,
Wherein the first band is a lower frequency band than the second band.
The method according to claim 1,
And a connection pipe extending from the first space part to the second space part and transmitting the refrigerant in the first space part to the second space part.
The method according to claim 6,
And the connecting pipe passes through the partition.
The method according to claim 6,
The connection pipe includes a first connection pipe extending from the partition to the first space and a second connection pipe extending from the partition to the second space, the second connection pipe communicating with the first connection pipe.
9. The method of claim 8,
Wherein the first connection pipe is disposed below the oil return pipe and the second connection pipe is disposed above the refrigerant outlet pipe.
The method according to claim 1,
The housing includes a body portion; A lower surface portion provided below the main body portion; And an upper surface portion provided on the upper side of the main body portion,
Wherein the first side portion is formed on the outer peripheral surface of the body portion of the housing,
Wherein the second side portion is formed on a lower surface portion of the housing, and the third side portion is formed on an upper surface portion of the housing.
The method of claim 10, wherein
And the oil return pipe is connected to the lowermost side of the bottom portion, and the refrigerant outlet pipe is connected to the recoil side of the upper face portion.
The method of claim 10, wherein
The inlet pipe
An outer inflow pipe located outside the main body and extending from the compressor to an outer circumferential surface of the housing; And
And an internal inflow pipe extending from the external inflow pipe and located inside the main body portion.
13. The method of claim 12,
Wherein the external inflow pipe comprises:
A first part having an end for introducing fluid and extending downward;
A second part for guiding the fluid sideways toward the housing;
And a bent part connected to the first part and the second part to switch the extending direction of the external inflow pipe.
13. The method of claim 12,
And an uneven portion including an acid and a valley is formed at an end of the inner inflow pipe.
The method of claim 1, wherein
And a penetrating portion penetrating the partitioning portion,
And the oil separated in the second space part is moved to the first space part through the penetrating part.
The method of claim 3,
And the height of the second space portion is shorter than 3/8 of the diameter of the housing.
The method according to claim 6,
Wherein the length of the first connection pipe is formed to be shorter than 2/3 of the diameter of the housing.

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