CN112556254A

CN112556254A - Oil separator and air conditioning system

Info

Publication number: CN112556254A
Application number: CN202011518217.3A
Authority: CN
Inventors: 曹理恒; 周堂; 何俊豪; 陈治贵
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2020-12-21
Filing date: 2020-12-21
Publication date: 2021-03-26

Abstract

The invention provides an oil separator and an air conditioning system, wherein the oil separator comprises a shell, an exhaust port is arranged at the top of the shell, a first airflow guide part is arranged in the shell, the first airflow guide part comprises a first cylinder wall and a second cylinder wall which are coaxially arranged, the first cylinder wall is positioned at the radial outer side of the second cylinder wall, the first end of the first cylinder wall is connected with the first end of the second cylinder wall through a first annular plate, the second end of the second cylinder wall is connected with a side vertical wall of the shell through a second annular plate, an annular gap is formed between the second end of the first cylinder wall and the second annular plate, and a first air inlet is arranged at the position of the shell corresponding to the annular gap. According to the first air flow guide part, the length of the refrigerant flow path in the first air inlet can be greatly increased, so that the refrigerant in the first air inlet can flow along the first air flow guide part and is separated and separated from oil due to the fact that the refrigerant is in contact with the wall body of the first air flow guide part in the flowing process, and the oil separation effect of the oil separator can be effectively improved.

Description

Oil separator and air conditioning system

Technical Field

The invention belongs to the technical field of air conditioning, and particularly relates to an oil separator and an air conditioning system.

Background

In an oil circuit system of a series heat pump water-cooling centrifuge, because gaps exist among all mechanisms, the refrigeration oil can run into a cooling system and is finally accumulated in an evaporator; secondly, as shown in fig. 1, since the oil tank needs to be filled with a refrigerant to cool the refrigeration oil, the liquid refrigerant evaporates after being heated, the gaseous refrigerant in the oil tank takes away fine oil drops on the liquid surface, the fine oil drops return to the air suction port of the compressor through the oil tank balance pipe, the compressor compresses the fine oil drops and returns to the condenser through the exhaust pipe, the fine oil drops are throttled from the bottom of the condenser into a mixture of liquid and oil through the throttling device and return to the evaporator, and the refrigeration oil is finally accumulated in the evaporator. In addition, in the cooling of the compressor motor, the evaporated refrigerant can also take away fine oil drops, and the refrigerant returns to the evaporator through the motor return air, so that more and more refrigeration oil is accumulated in the evaporator, and less oil is in an oil system, which easily causes the compressor bearing lubrication not in place and causes the bearing damage. In the prior art, in order to overcome the defects, oil separators are arranged in a motor return air pipeline and an oil tank balance pipeline to separate and recover a mixture of refrigerant and oil drops in motor return air and oil tank balance, but the separation effect is not ideal.

Disclosure of Invention

Therefore, the invention provides an oil separator and an air conditioning system, which aim to solve the technical problem that the separation effect of refrigerant and oil drops of the oil separator is poor in the prior art.

In order to solve the above problems, the present invention provides an oil separator, which includes a housing, wherein an exhaust port is disposed at a top of the housing, a first airflow guide member is disposed in the housing, the first airflow guide member includes a first cylinder wall and a second cylinder wall that are coaxially disposed, the first cylinder wall is located at a radial outer side of the second cylinder wall, a first end of the first cylinder wall is connected to a first end of the second cylinder wall through a first annular plate, a second end of the second cylinder wall is connected to a side standing wall of the housing through a second annular plate, an annular gap is formed between the second end of the first cylinder wall and the second annular plate, and a first air inlet is disposed at a position of the housing corresponding to the annular gap.

Preferably, a plurality of first oil dropping holes are formed in the second ring plate.

Preferably, the side of the air outlet facing the interior of the housing is provided with a central tube extending towards the bottom wall of the housing.

Preferably, a second airflow guide part is arranged between the outer pipe wall of the central pipe and the side standing wall of the shell, the second airflow guide part comprises a conical wall and a third annular plate, the conical top of the conical wall is connected with the central pipe, the conical bottom of the conical wall is connected with the inner diameter side of the third annular plate, the outer diameter side of the third annular plate is connected with the side standing wall, and a plurality of second oil dropping holes are formed in the third annular plate.

Preferably, an inclined included angle A is formed between the conical wall and the central line of the central pipe, and the inclined included angle A is more than or equal to 25 degrees and less than or equal to 45 degrees; and/or the second airflow guide is arranged in a plurality along the axial direction of the central tube, and the second airflow guides are arranged at intervals.

Preferably, the bottom of the shell is provided with an oil discharge port, and an oil baffle plate is arranged between the air inlet of the central pipe and the oil discharge port.

Preferably, a filter plate is arranged between the conical wall and the side vertical wall.

Preferably, there is a second air inlet, which is arranged at the housing corresponding to the annular gap.

The invention also provides an air conditioning system which comprises a compressor, a condenser, a throttling device and an evaporator, wherein the compressor, the condenser, the throttling device and the evaporator are sequentially connected to form refrigerant circulation, the air conditioning system also comprises an oil tank and an oil separator, the oil separator is arranged at an air suction pipe of the compressor to separate oil from refrigerant in an oil tank balance pipe of the oil tank, and an oil discharge port of the oil separator is communicated with the oil tank.

Preferably, the air conditioning system further comprises a first ejector, the first ejector is provided with a first ejection port, a second ejection port and a third ejection port, an oil tank balance pipe of the oil tank is communicated with the second ejection port, an oil tank cooling pipe of the oil tank is communicated with the condenser, an exhaust pipe of the compressor is communicated with the first ejection port, a first air inlet of the oil separator is communicated with the third ejection port, and an exhaust port of the oil separator is communicated with an air suction pipe of the compressor.

Preferably, the compressor is internally provided with a motor and further comprises a motor cooling pipeline, wherein the motor cooling pipeline comprises a motor cooling pipe for introducing part of refrigerant of the condenser into the motor part and a motor muffler for introducing the refrigerant after heat exchange with the motor out of the motor part.

Preferably, the air conditioning system further comprises a second ejector, the second ejector is provided with a fourth ejection port, a fifth ejection port and a sixth ejection port, the fifth ejection port is communicated with the motor air return pipe, the fourth ejection port is communicated with an exhaust pipe of the compressor, and the sixth ejection port is communicated with a second air inlet of the oil separator.

Preferably, the air conditioning system further comprises a third ejector, the third ejector is provided with a seventh ejector port, an eighth ejector port and a ninth ejector port, the seventh ejector port is communicated with an exhaust pipe of the compressor, the eighth ejector port is communicated with an exhaust port of the oil separator, and the ninth ejector port is communicated with an air suction pipe of the compressor.

According to the oil separator and the air conditioning system, the first air flow guide with the 5-shaped appearance structure can greatly increase the length of a refrigerant flow path in the first air inlet, so that the refrigerant in the first air inlet can flow along the first air flow guide, and oil is separated and separated due to the fact that the refrigerant is in contact with the wall body of the first air flow guide in the flowing process, and the oil separation effect of the oil separator can be effectively improved.

Drawings

FIG. 1 is a schematic diagram of a prior art air conditioning system;

FIG. 2 is a schematic diagram of an air conditioning system according to an embodiment of the present invention;

fig. 3 is a schematic view of the internal structure of the oil separator of fig. 1.

The reference numerals are represented as:

1. a compressor; 11. an air intake duct; 12. an exhaust pipe; 2. a condenser; 3. a throttling device; 4. an evaporator; 5. an oil tank; 51. an oil tank balance pipe; 52. an oil tank cooling pipe; 6. an oil separator; 61. a first air inlet; 62. an exhaust port; 63. an oil discharge port; 64. a second air inlet; 71. a first ejector; 72. a second ejector; 73. a third ejector; 81. a motor cooling tube; 82. a motor muffler; 601. a housing; 602. a first airflow guide; 6021. a first cylinder wall; 6022. a second cylinder wall; 6023. a first ring plate; 6024. a second ring plate; 603. a central tube; 604. a second airflow guide; 6041. a conical wall; 6042. a third ring plate; 605. an oil baffle plate; 606. a filter plate.

Detailed Description

Referring to fig. 1 to 3 in combination, according to an embodiment of the present invention, there is provided an air conditioning system, including a compressor 1, a condenser 2, a throttling device 3, an evaporator 4, the compressor 1, the condenser 2, the throttling device 3 and the evaporator 4 are sequentially connected to form refrigerant circulation, and the refrigerant circulation system also comprises an oil tank 5, an oil separator 6 and a first ejector 71, the first ejector 71 is provided with a first ejection port, a second ejection port and a third ejection port, the oil tank balance pipe 51 of the oil tank 5 is communicated with the second ejection port, an oil tank cooling pipe 52 of the oil tank 5 is communicated with the condenser 2, an exhaust pipe 12 of the compressor 1 is communicated with the first injection port, the first intake port 61 of the oil separator 6 communicates with the third ejector port, and the exhaust port 62 of the oil separator 6 communicates with the intake pipe 11 of the compressor 1. In the technical scheme, the refrigerant in the oil tank 5 flows back to the oil separator 6 under the injection effect of the high-pressure refrigerant introduced by the first injection port, so that the separation efficiency of the refrigerant and the oil content in the oil separator 6 can be improved, the oil separation effect of the oil separator 6 is improved, the oil content of the refrigerant in an air conditioning system can be reduced by the aid of the better oil separation effect, a large amount of oil content is effectively prevented from being accumulated in the evaporator 4, and the evaporation efficiency of the evaporator 4 is improved.

Preferably, the oil discharge port 63 of the oil separator 6 is communicated with the oil tank 5, that is, the oil (also referred to as lubricating oil or freezing oil) separated by the oil separator 6 is guided back to the oil tank 5 in time, so as to ensure that the oil content of the oil in the air conditioning system is stable, and the movable joint in the compressor 1, such as a bearing, can be sufficiently lubricated to ensure the reliable stability.

The air conditioning system comprises a compressor 1, a motor and a motor cooling pipeline, wherein the compressor 1 is internally provided with the motor, the motor cooling pipeline comprises a motor cooling pipe 81 for leading part of refrigerant of the condenser 2 into the motor part and a motor air return pipe 82 for leading out the refrigerant after heat exchange with the motor out of the motor part, so that the part of the refrigerant in the condenser 2 can be guided to the motor to form effective cooling for the motor. At this time, correspondingly, a second ejector 72 is further arranged in the air conditioning system, the second ejector 72 is provided with a fourth ejector port, a fifth ejector port and a sixth ejector port, the fifth ejector port is communicated with the motor air return pipe 82, the fourth ejector port is communicated with the exhaust pipe 12 of the compressor 1, and the sixth ejector port is communicated with the second air inlet 64 of the oil separator 6. In the technical scheme, the high-pressure refrigerant of the exhaust pipe of the compressor 1 has an injection effect on the refrigerant in the motor muffler 82, so that the oil in the refrigerant in the motor muffler 82 is effectively separated.

In some embodiments, the air conditioning system further includes a third ejector 73, the third ejector 73 has a seventh ejection port, an eighth ejection port, and a ninth ejection port, the seventh ejection port is communicated with the exhaust pipe 12 of the compressor 1, the eighth ejection port is communicated with the exhaust port 62 of the oil separator 6, and the ninth ejection port is communicated with the suction pipe 11 of the compressor 1. In the technical scheme, the gaseous refrigerant after oil separation in the exhaust port 62 of the oil separator 6 can be injected into the air suction pipe 11 of the compressor 1 through the high-pressure refrigerant of the exhaust pipe of the compressor 1, so that air suction of the compressor 1 is smoother.

As an embodiment of the oil separator 6, preferably, the oil separator 6 includes a housing 601, the top of the housing 601 is provided with the gas outlet 62, a first gas flow guide 602 is disposed in the housing 601, the first gas flow guide 602 includes a first cylinder wall 6021 and a second cylinder wall 6022 that are coaxially disposed with each other, the first cylinder wall 6021 is located radially outside the second cylinder wall 6022, a first end of the first cylinder wall 6021 is connected to a first end of the second cylinder wall 6022 by a first annular plate 6023, a second end of the second cylinder wall 6022 is connected to a side standing wall of the housing 601 by a second annular plate 6024, and an annular gap is formed between a second end of the first cylinder wall 6021 and the second annular plate 6024, so that the first gas flow guide 602 presents a 5-shaped appearance structure in an axial section of the housing 601 (as shown in fig. 3), at this time, the first air inlet 61 is provided at the housing 601 corresponding to the annular gap. In this embodiment, the first air flow guide 602 having a 5-shaped external structure can greatly increase the length of the refrigerant flow path in the first air inlet 61, so that the refrigerant in the first air inlet 61 can flow along the first air flow guide 602 and can be separated and separated from the oil due to contact with the wall body of the first air flow guide 602 during the flow process, thereby effectively improving the oil separation effect of the oil separator 6. Preferably, the second ring plate 6024 is provided with a plurality of first oil dropping holes (not shown) so that the oil (oil drops) separated and separated from the first tube wall 6021, the second tube wall 6022, and the first ring plate 6023 can be rapidly accumulated at the bottom of the oil separator 6 and flow back into the oil tank 5 through the oil drain 63.

In some embodiments, the side of the air outlet 62 facing the inside of the housing 601 is provided with a center tube 603, and the center tube 603 extends toward the bottom wall of the housing 601. The center pipe 603 is provided to enable the actual position of the outlet of the refrigerant to be located in the bottom region close to the housing 601, thereby further increasing the length of the flow path of the refrigerant in the oil separator 6, which can further improve the oil separation effect of the oil separator 6.

Further, a second airflow guide 604 is arranged between the outer pipe wall of the center pipe 603 and the side standing wall of the housing 601, the second airflow guide 604 includes a conical wall 6041 and a third ring plate 6042, a conical top of the conical wall 6041 is connected to the center pipe 603, a conical bottom of the conical wall 6041 is connected to an inner diameter side of the third ring plate 6042, an outer diameter side of the third ring plate 6042 is connected to the side standing wall, and a plurality of second oil dropping holes (not shown in the figure) are configured on the third ring plate 6042. In this embodiment, the second airflow guide 604 is disposed on the airflow discharge path of the first airflow guide 602, a refrigerant flow channel is formed between the second cylinder wall 6022 and the center tube 603, the refrigerant therein can be further separated into oil on the conical wall 6041, and the separated oil can flow to the third ring plate 6042 along the inclined surface of the conical wall 6041 and be accumulated at the bottom of the housing 601 through the second oil dropping hole. Preferably, an inclined included angle a is formed between the conical wall 6041 and the central line of the central pipe 603, wherein a is more than or equal to 25 degrees and less than or equal to 45 degrees, and preferably, a is more than or equal to 30 degrees, so that the conical wall 6041 has a good oil content guiding effect, the contact surface between the conical wall 6041 and a refrigerant flowing is as large as possible, and an oil separation effect is ensured; the second airflow guides 604 are arranged along the axial direction of the central tube 603, the second airflow guides 604 are arranged at intervals, a double-layer, three-layer or multi-layer structure is objectively formed, and the interlayer gaps between the two adjacent layers of the second airflow guides 604 form fine spaces so that oil drops can slide down more quickly. It should be noted that, in the present invention, the second airflow guide 604 can further guide the refrigerant airflow flowing out from the first airflow guide 602 of the housing 601 to the side of the side vertical wall of the housing 601, and form an oil separation area near the air inlet of the central tube 603, which is beneficial to preventing the refrigerant gas from being trapped again at the air inlet of the central tube 603 and discharging separated oil droplets, thereby ensuring the oil separation effect of the oil separator 6.

In some embodiments, an oil baffle 605 is disposed between the air inlet of the central tube 603 and the oil outlet 63, a plurality of through holes are disposed on the oil baffle 605, and the oil baffle 605 is disposed at a position above an oil collecting liquid level at the bottom of the housing 601, so as to prevent oil droplets separated from the second airflow guide 604 above the oil baffle from directly falling onto the liquid level below the oil baffle and causing oil splashing, and further prevent the splashed oil from being carried again by gaseous refrigerant and entering the central tube 603 for discharge.

When the oil separator 6 has the second air inlet 64, the second air inlet 64 is disposed at the housing 601 corresponding to the annular gap, and it is understood that the first air inlet 61 and the second air inlet 64 may be implemented by the same air inlet.

Preferably, a filter plate 606 is disposed between the conical wall 6041 and the side vertical wall, the filter plate 606 is preferably disposed in multiple layers, and the multiple layers of the filter plate 606 are disposed at intervals along the axial direction of the housing 601, so as to form a further oil separation effect on the refrigerant airflow. Specifically, the filter plate 606 may be a thin circular metal plate with dense fine meshes distributed on the surface thereof.

The first airflow guide 602 and the second airflow guide 604 may also be formed by sheet metal.

The first ejector 71, the second ejector 72 and the third ejector 73 can be selected according to the actual pipeline design and flow requirements.

It is readily understood by a person skilled in the art that the advantageous ways described above can be freely combined, superimposed without conflict.

The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention. The above is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the technical principle of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. An oil separator is characterized by comprising a shell (601), wherein the top of the shell (601) is provided with an exhaust port (62), a first air flow guide part (602) is arranged in the shell (601), the first air flow guide part (602) comprises a first cylinder wall (6021) and a second cylinder wall (6022) which are coaxially arranged, the first cylinder wall (6021) is radially outward of the second cylinder wall (6022), and the first end of the first cylinder wall (6021) is connected with the first end of the second cylinder wall (6022) through a first ring plate (6023), the second end of the second cylinder wall (6022) is connected with the side vertical wall of the shell (601) through a second ring plate (6024), an annular gap is formed between the second end of the first cylinder wall (6021) and the second ring plate (6024), a first air inlet (61) is arranged at the position of the shell (601) corresponding to the annular gap.

2. An oil separator according to claim 1, wherein a plurality of first oil dropping holes are provided in the second ring plate (6024).

3. -oil separator according to claim 1, characterised in that the side of the gas outlet (62) facing the interior of the housing (601) is provided with a central tube (603), the central tube (603) extending towards the bottom wall of the housing (601).

4. The oil separator according to claim 3, characterized in that a second air flow guide (604) is arranged between the outer pipe wall of the center pipe (603) and the side standing wall of the housing (601), the second air flow guide (604) comprises a conical wall (6041) and a third annular plate (6042), the conical top of the conical wall (6041) is connected with the center pipe (603), the conical bottom of the conical wall (6041) is connected with the inner diameter side of the third annular plate (6042), the outer diameter side of the third annular plate (6042) is connected with the side standing wall, and a plurality of second oil dropping holes are formed in the third annular plate (6042).

5. An oil separator according to claim 4, characterized in that the conical wall (6041) has an inclined angle A between the centre line of the central tube (603), 25 ° ≦ A ≦ 45 °; and/or the second air flow guides (604) are arranged in a plurality along the axial direction of the central tube (603), and the second air flow guides (604) are arranged at intervals.

6. An oil separator according to claim 4, characterized in that the bottom of the housing (601) is configured with an oil discharge (63), and an oil baffle (605) is provided between the inlet of the central tube (603) and the oil discharge (63).

7. An oil separator according to claim 4, characterized in that a filter plate (606) is provided between the conical wall (6041) and the side standing wall.

8. The oil separator of claim 1, further having a second inlet port (64), the second inlet port (64) being disposed at the housing (601) corresponding to the annular gap.

9. The utility model provides an air conditioning system, its characterized in that, includes compressor (1), condenser (2), throttling arrangement (3), evaporimeter (4), compressor (1), condenser (2), throttling arrangement (3), evaporimeter (4) connect gradually and form refrigerant circulation, still include oil tank (5), oil separator (6), breathing pipe (11) department that compressor (1) has is equipped with oil separator (6), in order to right refrigerant in the oil tank balance pipe (51) of oil tank (5) realizes the oil content separation, oil drain (63) of oil separator (6) with oil tank (5) intercommunication.

10. The air conditioning system according to claim 9, further comprising a first ejector (71), wherein the first ejector (71) has a first ejection port, a second ejection port and a third ejection port, the oil tank balance pipe (51) of the oil tank (5) is communicated with the second ejection port, the oil tank cooling pipe (52) of the oil tank (5) is communicated with the condenser (2), the compressor (1) has an exhaust pipe (12) communicated with the first ejection port, the oil separator (6) has a first air inlet (61) communicated with the third ejection port, and the oil separator (6) has an exhaust port (62) communicated with the air suction pipe (11) of the compressor (1).

11. The air conditioning system as claimed in claim 9, wherein the compressor (1) has a motor therein, and further comprises a motor cooling pipeline, the motor cooling pipeline comprises a motor cooling pipe (81) for introducing a part of refrigerant of the condenser (2) into the motor portion, and a motor return pipe (82) for leading out refrigerant after heat exchange with the motor portion to the motor portion.

12. The air conditioning system according to claim 11, further comprising a second ejector (72), wherein the second ejector (72) has a fourth ejection port, a fifth ejection port and a sixth ejection port, the fifth ejection port is communicated with the motor return air pipe (82), the fourth ejection port is communicated with an exhaust pipe (12) provided in the compressor (1), and the sixth ejection port is communicated with a second air inlet (64) provided in the oil separator (6).

13. The air conditioning system according to claim 9, further comprising a third ejector (73), wherein the third ejector (73) has a seventh ejection port, an eighth ejection port, and a ninth ejection port, the seventh ejection port is communicated with the exhaust pipe (12) of the compressor (1), the eighth ejection port is communicated with the exhaust port (62) of the oil separator (6), and the ninth ejection port is communicated with the suction pipe (11) of the compressor (1).