WO2018126752A1

WO2018126752A1 - Oil separation device, screw compressor and air-conditioning system

Info

Publication number: WO2018126752A1
Application number: PCT/CN2017/105344
Authority: WO
Inventors: 李日华; 张天翼; 张贺龙; 许云功; 张宝鸽; 袁皓
Original assignee: 珠海格力电器股份有限公司
Priority date: 2017-01-06
Filing date: 2017-10-09
Publication date: 2018-07-12
Also published as: CN106678046B; CN106678046A

Abstract

Disclosed are an oil separation device, a screw compressor and an air-conditioning system. The oil separation device comprises an oil separation tank (1) having an inner cavity, and a primary oil separation structure (2) and a secondary oil separation structure (3), which are arranged inside the oil separation tank (1). The inner cavity is separated into a horizontally arranged upstream cavity (6) and downstream cavity (7) by the primary oil separation structure (2), the upstream cavity (6) being provided with a gas inlet (4) in communication with a gas discharge pipe (10) of a compression mechanism, and the downstream cavity (7) being provided with a gas discharge outlet (5) in communication with an inlet of a condenser. The secondary oil separation structure (3) separates the downstream cavity (7) into an upper cavity (71) and a lower cavity (72), the upper cavity (71) having the gas discharge outlet (5).

Description

Oil separation device, screw compressor and air conditioning system

Technical field

The utility model relates to the technical field of compressors, in particular to an oil separation device, a screw compressor and an air conditioning system.

Background technique

The screw compressor is a semi-hermetic compressor that is compressed by oil and gas mixing. Usually, the screw compressor is provided with an oil separation device. Since the refrigerant is a mixture of refrigerant and oil droplets when the compressor is discharged from the compressor, oil separation is required by the oil separation device. After recycling, the damage to the internal oil circulation of the compressor is reduced to save compressor fuel consumption.

The oil component structure of a conventional compressor includes an oil sub-barrel, and an oil-splitting structure composed of a porous steel plate sandwiching filter in the oil-disc barrel divides the internal cavity into two chambers upstream and downstream, wherein the upstream chamber is provided with a connecting compressor The intake port of the exhaust pipe is provided with an exhaust port connected to the inlet of the condenser in the downstream chamber. For the purpose of gravity and material quality, in order to facilitate separation, the exhaust port of the downstream chamber is placed at the upper position of the oil drum. For horizontally arranged oil drums, the upstream and downstream chambers are arranged in a substantially horizontal arrangement. In this way, during operation, the mixture of refrigerant and oil is discharged from the exhaust pipe and reaches the upstream chamber of the oil drum, and then filtered through the filter into the downstream chamber, and then discharged through the exhaust port above the oil drum. However, the oil separation device of this structure, after the refrigerant and oil mixture is discharged from the exhaust pipe, a part is collected at the bottom of the inner cavity of the oil separation drum, and flows from the bottom of the oil filter to the downstream chamber from the upstream chamber. In the oil tank, some of the oil droplets have been separated by the refrigerant of the oil filter, but when the compressor discharge is relatively large (ie, when the exhaust pipe flow rate is high), the pressure gradient environment formed in the downstream chamber makes the downstream cavity The pressure at the oil groove in the chamber is greater than the pressure difference at the exhaust port. At this time, the air flow in the downstream chamber is easy to take up the oil droplets or mixture in the oil tank, and is discharged from the exhaust port together. Out, this loss of oil effect results in insufficient circulating oil inside the compressor and reduces the energy efficiency of the compressor.

In order to overcome this drawback, Chinese Patent Publication No. CN105840519A discloses an oil-separating barrel, wherein the technical solution is based on the above-mentioned prior art oil-tank structure, and a secondary oil-dispensing filter is arranged at the exhaust port, thereby improving Oil efficiency. However, in this technical solution, the secondary oil filter screen disposed at the exhaust port is in a narrow air path, and on the one hand, the flow velocity at the maximum is not conducive to the separation of oil and gas. On the other hand, the filtration area of the secondary oil filter is limited by the size of the exhaust port, and the filter area of the filter is small, and the large amount of oil and gas mixture in the barrel is only discharged therefrom, which causes the secondary oil filter to be easily blocked, and the oil effect Poor, need to be replaced frequently.

Utility model content

Therefore, the technical problem to be solved by the utility model is to overcome the problem that the secondary oil filter screen which is added to the exhaust port of the prior art has poor separation effect and is easy to block, thereby providing a secondary oil filter screen structure. A reasonable oil separator with better oil content.

Further provided is a screw compressor having the above oil separation device.

Further provided is an air conditioning system having the above screw compressor.

The technical scheme adopted by the utility model is as follows:

An oil separation device comprising: an oil sub-tank having an internal chamber; a primary oil sub-structure disposed in the oil sub-tank to separate the internal chamber into an upstream chamber provided with an intake port communicating with a compression mechanism exhaust pipe a chamber, and a downstream chamber provided with an exhaust port connected to the inlet of the condenser; the upstream chamber and the downstream chamber are arranged horizontally with each other; and a secondary oil sub-structure is disposed in the downstream chamber Separating the downstream chamber into a lower chamber and an upper chamber, the upper portion The chamber has the exhaust port.

The secondary oil substructure has at least one porous plate formed with a plurality of through holes.

When the secondary oil component has at least two layers of the porous plate, an oil filter is interposed between the adjacent two layers of the porous plates.

The through hole is not provided to the porous plate portion of the exhaust port.

The secondary oil substructure includes an oil filter.

The secondary oil substructure is adjacent to the primary oil component such that a portion of the primary oil component forms a portion of the upper chamber sidewall; the primary oil component constitutes a portion of the upper chamber sidewall that is isolated Gas-liquid communication between the upstream chamber and the upper chamber.

The bottom portion of the primary oil component is shielded from the gas-liquid circulation between the upstream chamber and the downstream chamber except that a through-hole is formed in the lowermost portion.

An oil reservoir is provided in the downstream chamber for collecting oil droplets entering the downstream chamber.

The bottom of the upstream chamber is provided with a baffle plate for limiting the fluctuation of the liquid level of the oil in the oil storage tank, and the oil baffle has an oil passage.

A screw compressor includes: a compression mechanism having a compression mechanism exhaust pipe for discharging compressed gas; and the oil separation device.

An air conditioning system includes the screw compressor.

The technical scheme of the utility model has the following advantages:

1. The oil separation device provided by the utility model comprises an oil sub-bucket with an internal chamber, and The primary oil sub-structure and the secondary oil sub-structure in the oil sub-tank, the internal chamber is separated into a horizontally arranged upstream chamber and a downstream chamber by a primary oil sub-structure, and the upstream chamber is provided with an air inlet communicating with the compression mechanism exhaust pipe. The downstream chamber is provided with an exhaust port connected to the inlet of the condenser, and the secondary oil substructure divides the downstream chamber into an upper chamber and a lower chamber, the upper chamber has the exhaust port, and the secondary oil substructure is disposed in the downstream chamber Indoor, its size is not limited by the size of the exhaust port. It can maximize the design of the filter area according to the size of the oil barrel, increase the contact area between the secondary oil structure and the oil and gas mixture, reduce the blockage of the oil structure, and increase the effective service life of the oil structure. While increasing the secondary filtration, the oil droplets which are taken up by the once filtered gas are filtered to improve the oil component efficiency while avoiding the loss of the oil component effect; in addition, the secondary oil component structure forms an upper portion at the exhaust port. The chamber, the oil and gas mixture is separated by a primary oil structure and then enters the lower chamber of the downstream chamber and then enters the upper chamber to be exhausted from the exhaust port. Into the condenser inlet, such an arrangement increases the flow of thread fuel-air mixture, the flow field is more uniform mixing, at the same pressure, flow rate, temperature and other conditions, the more uniform flow more conducive to improve the oil effect of oil structure.

2. The oil separation device provided by the utility model has a secondary oil structure having at least two porous plates formed with a plurality of through holes, and the through holes on the porous plate form a secondary separation channel of the oil and gas mixture, and the oil and gas mixture moves to the secondary oil structure. Collision with the perforated plate is broken up, so that the flow rate is more uniform, which is more conducive to improving the filtering effect. The gas passes through the secondary oil sub-structure along several through holes, and the oil droplets are subjected to gravity in the collision process, thereby being separated; At the same time, the oil and gas mixture must pass through a number of through holes in the perforated plate to enter the upper chamber from the lower chamber, increasing the oil and gas mixture. The flow of threads helps to improve oil efficiency.

3. The oil separation device provided by the utility model has an oil filter screen disposed between two adjacent porous plates, and the porous plate can clamp the oil filter mesh while providing fixation and support for the oil filter screen, which is a filter mesh. More encrypted, the filter has a smaller gap, and the filter effect is better when the oil and gas mixture passes through the filter.

4. The oil distribution device provided by the utility model, the perforated plate is not provided with a through hole at the exhaust port, and the oil and gas mixture is directly discharged through the secondary oil substructure along the shortest path, thereby further increasing the flow thread of the oil and gas mixture and improving the oil content. effectiveness.

5. The oil separation device provided by the utility model, the secondary oil substructure is adjacent to the primary oil substructure, such that a part of the primary oil component constitutes a part of the upper chamber side wall, and the primary oil substructure constitutes a part of the upper chamber side wall to isolate the upstream chamber The gas-liquid circulation between the upper chamber and the upper chamber will cause the gas-oil mixture to collide with the air inlet of the exhaust pipe of the compression mechanism, and will impinge on the inside of the oil-filled barrel and rotate around the inner wall of the oil-filled barrel. The large amount of oil and gas mixture quickly passes through the primary oil structure, and the filtering effect is poor. Therefore, the portion is closed and forms part of the side wall of the upper chamber, so that the oil and gas mixture of the upstream chamber can be decelerated through the primary oil structure and enter the lower chamber. After entering the upper chamber through the secondary oil structure, the oil efficiency is improved, and the filtration area of the secondary oil structure is maximized.

6. The oil distribution device provided by the utility model has the oil-liquid circulation between the upstream chamber and the downstream chamber in addition to the oil passage hole formed in the bottom portion of the primary oil component structure, and is separated by the oil separation structure. The oil will collect at the bottom of the upstream chamber, once the oil structure The lower part is provided with an oil through hole, which allows the oil at the bottom of the upstream chamber to flow into the lower chamber for oil circulation. However, due to a certain pressure difference between the upstream chamber and the downstream chamber, the hole at the bottom of the primary oil structure is excessive. Part of the oil and gas mixture is mixed into the oil, and enters the oil tank of the downstream chamber through the primary oil structure, and the portion of the primary oil structure immersed in the oil does not function as a filter. Therefore, the filter hole at the bottom of the oil structure is eliminated. Only the through holes through which the oil passes are retained, so that the oil and gas mixture is concentrated out through the middle of the primary oil structure to discharge the upstream chamber, and the oil and gas mixture that does not reach the separation effect is prevented from entering the downstream chamber through the primary oil structure.

7. The oil separation device provided by the utility model is provided with an oil storage tank in the downstream chamber, which can collect the oil entering the downstream chamber for recycling.

8. The oil distribution device provided by the utility model is provided with an oil baffle plate having an oil passage passage at the bottom of the upstream chamber, and the oil separated by the primary oil separation structure flows through the oil passage to the bottom of the upstream chamber, due to the oil storage tank and the upstream The bottom of the chamber communicates through the oil through hole, and the separated oil collects in the bottom of the oil storage tank and the upstream chamber, but the installation space in the downstream chamber is limited, so the oil retaining plate is disposed in the upstream chamber, and can be fixed To a certain extent, it limits the fluctuation of the liquid level of the oil in the oil storage tank, and prevents the fluctuation of the liquid level of the oil storage tank from being excessively affected, which affects the replenishment of the oil.

9. The screw compressor provided by the utility model comprises a compression mechanism and the above oil separation device, which reduces the damage to the oil circulation inside the compression mechanism by improving the oil separation effect, thereby saving the fuel consumption of the compressor.

10. The air conditioning system provided by the utility model, including the above screw compressor, has good oil separation effect and is more conducive to energy conservation and environmental protection.

DRAWINGS

In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the specific embodiments or the description of the prior art will be briefly described below, and obviously, in the following description The drawings are some embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without any creative work.

Figure 1 is an axial cross-sectional view of the oil separation device according to the first embodiment of the present invention along the exhaust port;

Figure 2 is an axial cross-sectional view of the oil separation device of Figure 1 perpendicular to the axis of the exhaust port;

FIG. 3 is a schematic structural view of the primary oil component structure shown in FIG. 1. FIG.

Description of the reference signs:

1-oil barrel; 2-primary oil structure; 21-round porous steel plate; 3-secondary oil structure; 31-L type porous steel plate; 32-oil filter; 4-air inlet; 5-exhaust port; 6-upstream chamber; 7-downstream chamber; 71-upper chamber; 72-lower chamber; 8--oil passage hole; 9-oil reservoir; 10-compression mechanism exhaust pipe; 11-oil plate; 12-over oil passage.

detailed description

The technical solutions of the present invention will be described clearly and completely in conjunction with the accompanying drawings. It is obvious that the described embodiments are a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

Further, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not constitute a conflict with each other.

Embodiment 1

Figure 1 is an axial cross-sectional view of the oil separation device of the first embodiment of the present invention along the exhaust port; Figure 2 is an axial cross-sectional view of the oil separation device of Figure 1 perpendicular to the axis of the exhaust port; Schematic diagram of the structure of the primary oil fraction shown in 1. As shown in FIG. 1-3, the oil separation device provided in this embodiment includes an oil sub-barrel 1 having an internal chamber, and the primary oil sub-structure 2 is disposed along a radial plane of the barrel to divide the internal chamber into an axial direction along the barrel. The distributed upstream chamber 6 and the downstream chamber 7, wherein the downstream chamber 7 is connected to a compression mechanism, the compression mechanism exhaust pipe 10 extends into the downstream chamber 7, and passes through the primary oil substructure 2, so that the compression mechanism exhaust pipe 10 The air inlet 4 is located in the upstream chamber 6, and the compressed gas of the compression mechanism is directly discharged into the upstream chamber 6. The secondary oil structure 3 is disposed in the downstream chamber 7 along the axial plane of the barrel, and the downstream chamber is provided. The chamber 7 is partitioned into an upper chamber 71 and a lower chamber 72 distributed along the radial direction of the barrel, wherein the upper chamber 71 has an exhaust port 5 that communicates with the condenser inlet, and the oil and gas mixture is self-compressing from the compression mechanism. The mouth 4 is discharged, enters the upstream chamber 6, and is separated once by the primary oil structure 2, enters the lower chamber 72 of the downstream chamber 7, and undergoes secondary separation through the secondary oil component 3, and enters the upper chamber of the downstream chamber 7. The chamber 71 is finally discharged through the exhaust port 5.

As shown in FIG. 3, the primary oil component 2 includes two circular porous steel plates 21 disposed in parallel along the radial plane of the barrel of the oil drum 1, and an oil filter 32 is interposed between the two circular porous steel plates 21, A plurality of through holes on the circular porous steel sheet 21 are horizontally distributed along the middle position of the circular porous steel sheet 21, that is, no through holes are provided in the upper portion of the circular porous steel sheet 21, and gas and liquid cannot pass therethrough, and circular porous Four oil passage holes 8 are provided at the bottom of the steel plate 21, and no through holes are formed between the oil passage holes 8 and the horizontal belt-shaped through holes distributed at the intermediate position of the circular porous steel plate 21, and the gas and liquid cannot pass therethrough. The oil and gas mixture is discharged into the upstream chamber 6 from the air inlet 4, and is concentrated from the horizontal strip-shaped through hole distributed at the intermediate position of the circular porous steel plate 21, enters the lower chamber 72, and is separated by a separated oil and gas mixture. A part of the oil is collected to the bottom of the upstream chamber 6, and flows into the oil storage tank 9 provided at the bottom of the lower chamber 72 through the oil passage hole 8 for recycling by the compression mechanism.

The upper part of the primary oil separation structure 2 isolates the gas-liquid circulation of the upstream chamber 6 and the downstream chamber 7, thereby avoiding the oil component effect caused by the oil-gas mixture structure 2 directly at the maximum flow velocity, and the lower portion of the primary oil-part structure 2 The arrangement of the oil-liquid circulation of the upstream chamber 6 and the downstream chamber 7 by the oil-through hole 8 eliminates the filtering through-hole which loses the filtering effect in the prior art, and avoids the inside of the upstream chamber 6 caused by the excessive number of the bottom through-holes. The oil and gas mixture is mixed into the bottom oil under strong pressure, flows into the oil storage tank 9 of the downstream chamber 7, and enters the oil circulation of the compression mechanism.

An oil baffle 11 is disposed at the bottom of the upstream chamber 6. The oil passage 11 is formed with an oil passage 12, and the oil separated by the primary oil structure 2 flows through the oil passage 12 to the bottom of the upstream chamber 6, and the oil retaining plate 11 is disposed in the upstream chamber 6, which can limit the liquid level of the oil in the oil storage tank 9 to some extent. The fluctuation range prevents the fluctuation of the liquid level measurement of the oil storage tank 9 from being excessively large, which affects the replenishment of the oil.

The secondary oil component structure 3 comprises two layers of porous steel plates which are arranged in an overlapping manner and have an L-shaped cross section. The horizontal portion of the L-shaped porous steel plate 31 is disposed opposite to the exhaust port 5, and the edge is sealedly connected to the side wall of the barrel body, and the vertical portion is sealedly connected. On the upper wall of the barrel, the free end of the horizontal portion is connected to the horizontal strip-shaped through hole of the circular porous steel sheet 21 of the primary oil component 2, enclosing the upper chamber 71 such that the upper chamber 71 and the upstream chamber 6 There is no direct communication between the two, and the oil and gas mixture must pass through the lower chamber 72 to enter the upper chamber 71.

When the porous steel plate is arranged, when the oil and gas mixture collides with the porous steel plate, the special mixture can be dispersed to a certain extent, the flow rate is more uniform, and the filtering effect is more favorable; in addition, the porous steel plate clamps the oil filter 32 to filter The gap between the nets is smaller, which is more conducive to improving the filtering effect.

An oil filter screen 32 is interposed between the two L-shaped porous steel sheets 31 of the secondary oil component structure 3. The horizontal portion of the L-type porous steel sheet 31 is provided with a plurality of through holes, as shown in FIG. 2, but the exhaust port 5 is The projection on the horizontal portion is not provided with a through hole, and the oil and gas mixture in the lower chamber 72 is prevented from directly exiting the exhaust port 5 through the secondary oil component 3 along the shortest distance, thereby increasing the flow thread of the oil and gas mixture.

The arrangement of the secondary oil component 3 not only increases the secondary separation of the oil and gas mixture of the lower chamber 72 before the exhaust port 5, but also improves the oil separation efficiency, and avoids the airflow being sucked up when the pressure inside the barrel is too large. The oil droplets or mixture in the oil storage tank 9 directly discharges the exhaust port 5, thereby avoiding the loss of the oil component effect, and at the same time, since the secondary oil component structure 3 is directly disposed in the downstream chamber 7, the size is not Limited by the size of the exhaust port 5, the filter area can be maximized according to the size of the oil barrel 1, increase the contact area of the secondary oil structure 3 with the oil and gas mixture, reduce the blockage of the oil structure, increase the service life of the oil structure; The upper chamber 71 is formed at the mouth 5, which increases the flow thread of the oil and gas mixture, and the flow field can be more uniformly mixed. Under the same pressure, flow rate, temperature and the like, the more uniform the flow field is, the more favorable the oil component of the oil structure is. effect.

The embodiment further provides a screw compressor including a compression mechanism and a compression mechanism having a compression mechanism exhaust pipe 10 for discharging compressed gas, and an intake port 4 of the compression mechanism exhaust pipe 10 is disposed upstream In the chamber 6, by improving the oil component effect, the damage to the oil circulation inside the compression mechanism is reduced, and the compressor fuel consumption is saved.

The embodiment further provides an air conditioning system, including the screw compressor, which has good oil separation effect and is more conducive to energy conservation and environmental protection.

As an alternative embodiment of the first embodiment, the intake port of the exhaust pipe of the compression mechanism is disposed in the upstream chamber, and the oil and gas mixture discharged from the intake port enters the upstream chamber, passes through the oil separation structure, enters the lower chamber, and passes through the second time. The oil is divided into the upper chamber and discharged from the exhaust port.

As an alternative embodiment of the first embodiment, the secondary oil component structure is a layer of L-shaped porous plate, and the through hole on the porous plate forms a secondary separation channel of the oil and gas mixture, and the oil and gas mixture moves to the secondary oil component structure, and the porous plate occurs. The collision is broken up, the flow velocity is more uniform, the gas moves up through several through holes through the secondary oil substructure, and the oil droplets are descended by gravity during the collision process, thereby being separated; at the same time, the oil and gas mixture must pass through several passages on the perforated plate. Hole can be entered from the lower chamber Into the upper chamber, the flow thread of the oil and gas mixture is increased, which is beneficial to improve the oil efficiency.

As an alternative embodiment of the first embodiment, the secondary oil component is a three-layer L-shaped porous plate, and an oil filter is interposed between two adjacent porous plates.

As an alternative embodiment of the first embodiment, the secondary oil sub-structure is an oil filter screen that is fixed in the oil sub-tank by means of a connecting member.

As an alternative embodiment of the first embodiment, if the oil sub-barrel or the compression mechanism side has a side wall that can be used to enclose the upper chamber, the secondary oil sub-structure may also be an in-line perforated plate, and the periphery of the in-line perforated plate The edges are respectively sealed to the side wall of the oil barrel and a part of the perforated plate of the primary oil structure to enclose the upper chamber.

As an alternative embodiment of the first embodiment, the secondary oil sub-structure is a U-shaped perforated plate arranged in two layers, the horizontal portion of the U-shaped perforated plate is opposite to the exhaust port, and the edge is sealedly connected to the side wall of the barrel, two The vertical portion is sealingly connected to the upper wall of the barrel to enclose the upper chamber.

As an alternative embodiment of the first embodiment, the oil passage holes at the bottom of the primary oil partial structure are set to three.

It is apparent that the above-described embodiments are merely illustrative of the examples, and are not intended to limit the embodiments. Other variations or modifications of the various forms may be made by those skilled in the art in light of the above description. There is no need and no way to exhaust all of the implementations. The obvious changes or variations derived therefrom are still within the scope of protection created by the present invention.

Claims

An oil separation device comprising:

Oil barrel (1) with an internal chamber;

A primary oil sub-structure (2) is disposed in the oil sub-bucket (1) to divide the internal chamber into an upstream chamber (6) provided with an intake port (4) that communicates with the compression mechanism exhaust pipe (10) (6) And a downstream chamber (7) provided with an exhaust port (5) connected to the inlet of the condenser; the upstream chamber (6) and the downstream chamber (7) are arranged horizontally with each other;

It is characterized by

a secondary oil sub-structure (3) disposed in the downstream chamber (7) for separating the downstream chamber (7) into a lower chamber (72) and an upper chamber (71), the upper portion The chamber (71) has the exhaust port (5).
The oil separation device according to claim 1, characterized in that the secondary oil component (3) has at least one porous plate formed with a plurality of through holes.
The oil separation device according to claim 2, wherein when the secondary oil component (3) has at least two layers of the porous plate, an oil filter is interposed between two adjacent porous plates ( 32).
The oil separation device according to claim 2, wherein said through hole is not provided in said porous plate portion facing said exhaust port (5).
The oil separation device according to claim 1, characterized in that the secondary oil component (3) comprises an oil filter (32).
The oil separation device according to any one of claims 1 to 5, characterized in that the secondary oil component structure (3) is adjacent to the primary oil component structure (2) such that a part of the primary oil component structure (2) is constituted a portion of the sidewall of the upper chamber (71); the portion of the primary oil component (2) that forms the sidewall of the upper chamber (71) isolates the upstream chamber (6) from the upper chamber ( 71) Gas-liquid circulation between.
The oil separation device according to any one of claims 1 to 5, characterized in that the bottom portion of the primary oil component (2) is insulated from the upstream cavity except that the oil passage hole (8) is formed at the lowermost portion. Gas-liquid circulation between the chamber (6) and the downstream chamber (7).
The oil separation device according to any one of claims 1 to 5, characterized in that the downstream chamber (7) is provided with an oil reservoir (9) for collecting into the downstream chamber (7) Oil drops.
The oil separation device according to claim 8, characterized in that the bottom of the upstream chamber (6) is provided with an oil baffle (11) for limiting the liquid level fluctuation of the oil in the oil storage tank (9) In magnitude, the oil baffle (11) has an oil passage (12).
A screw compressor, comprising:

a compression mechanism having a compression mechanism exhaust pipe (10) for discharging compressed gas;

And the oil separation device according to any one of claims 1-9.
An air conditioning system comprising the screw compressor of claim 10.