WO2018171150A1

WO2018171150A1 - Air/oil separator, screw compressor, and air conditioning unit

Info

Publication number: WO2018171150A1
Application number: PCT/CN2017/103144
Authority: WO
Inventors: 许云功; 李日华; 张天翼; 张宝鸽; 张贺龙; 袁皓
Original assignee: 珠海格力电器股份有限公司
Priority date: 2017-03-23
Filing date: 2017-09-25
Publication date: 2018-09-27
Also published as: CN106870372A; CN106870372B

Abstract

An air/oil separator, comprising: a separator body (10), having an accommodating cavity; and an air/oil separation assembly, provided in the accommodating cavity and dividing the accommodating cavity into a first cavity (11) and a second cavity (12), the volume of the first cavity (11) being smaller than or equal to the volume of the second cavity (12); the air/oil separation assembly comprises an air/oil separator filter (21) and a backflow container (22), an opening (221) of the backflow container (22) facing towards the second cavity (12). Further disclosed are a screw compressor and an air conditioning unit having said air/oil separator. Said air/oil separator can improve the air/oil separation efficiency of the compressor.

Description

Oil drum, screw compressor and air conditioning unit

Technical field

The invention relates to the field of air conditioning equipment, in particular to an oil drum, a screw compressor and an air conditioning unit.

Background technique

At present, the built-in oil and gas separation of the screw compressor adopts the separation structure of the oil filter. Usually, the structure we use is shown in Figure 1. The compressor is vented to the sealed chamber 3' formed by the oil filter 1' and the oil drum, and then discharged through the oil filter 1'. The efficiency of oil and gas separation is related to the following factors. First, the flow rate through the oil filter 1', usually the lower the flow rate, the higher the oil efficiency; the second is the stroke of the air flow, the longer the stroke, the better the effect of oil and gas separation due to gravity; the third is the impact with the inner wall of the air passage The larger the inner wall area of the airflow contact, the more the impact, the better the oil and gas separation effect. At present, the scheme adopted by the compressor has the following disadvantages: First, the sealing cavity is small, the effect of gravity separation and internal wall impact separation is not good; after the analysis of the flow field, it is found that the airflow tends to pass through the oil filter 1'. Concentration at the inner wall of the circumference of the oil drum, concentration will cause a large flow rate of this part of the air flow, and the consequence of the large flow rate is that the effect of the oil filter 1' is poor.

Summary of the invention

The present invention aims to provide an oil drum, a screw compressor and an air conditioning unit capable of improving the separation effect of oil and gas.

The present invention provides an oil sub-barrel comprising: a tub having a receiving chamber; an oil sub-assembly, the oil sub-assembly is disposed in the receiving chamber, and partitioning the receiving chamber into the first chamber and the second chamber, first The volume of the chamber is less than or equal to the volume of the second chamber, the oil subassembly includes an oil screen and a return barrel, the opening of the recirculation barrel facing the second chamber.

The oil barrel further includes an exhaust port corresponding to the first chamber disposed on the barrel wall of the tub and communicating with the first chamber.

Further, in the cross-sectional direction of the tub, the exhaust port is disposed on a side away from the recirculation tub.

Further, the oil drum further includes an injection pipe disposed in the second chamber, and the injection port of the injection pipe faces the opening of the return bucket.

Further, the area of the opening of the reflow bucket is 2 to 4 times the area of the injection port of the injection pipe.

Further, the return bucket is fixedly disposed on the inner wall of the barrel, the oil filter screen is sleeved outside the return bucket, and covers the cross section of the barrel, and the oil filter screen is provided with a through hole.

Further, the first chamber is located on a side of the barrel near the bottom.

According to another aspect of the present invention, there is provided a screw compressor including an oil sub-tank which is the above-described oil sub-bucket.

Further, the barrel of the oil barrel is fixedly connected to the casing of the screw compressor, and the injection tube of the oil barrel is connected to the air outlet of the screw compressor.

According to another aspect of the present invention, an air conditioning unit is provided that includes the screw compressor unit described above.

According to the oil barrel, the screw compressor and the air conditioning unit of the present invention, the oil filter screen and the return barrel are arranged in the barrel body, and the flow direction is changed by the reflux barrel to reduce the concentration of the air flow, and at the same time, the air flow and the wall surface impact oil and gravity oil are increased. The effect is to comprehensively improve the oil efficiency of the compressor.

DRAWINGS

The accompanying drawings, which are incorporated in the claims In the drawing:

1 is a schematic structural view of a prior art oil drum;

Figure 2 is a schematic perspective view of a screw compressor according to the present invention;

Figure 3 is a cross-sectional structural view of a screw compressor according to the present invention;

Figure 4 is a perspective view showing the structure of a barrel and a return barrel of a screw compressor according to the present invention;

Figure 5 is a front elevational view showing the structure of the barrel and the return barrel of the screw compressor according to the present invention;

Figure 6 is a perspective cross-sectional structural view of a barrel and a return barrel of a screw compressor according to the present invention.

Description of the reference signs:

10, barrel; 11, the first chamber; 12, the second chamber; 21, oil filter; 22, reflux barrel; 221, opening; 31, exhaust port; 40, injection tube; 41, injection port.

detailed description

The invention will be described in detail below with reference to the drawings in conjunction with the embodiments.

As shown in FIG. 2, according to an embodiment of the present invention, the oil sub-tank includes a tub 10 and an oil sub-assembly, the tub 10 has a receiving chamber; the oil sub-assembly is disposed in the receiving chamber, and partitions the receiving chamber into the first chamber 11 and The second chamber 12 has a volume of the first chamber 11 that is less than or equal to the volume of the second chamber 12, and the oil component includes an oil screen 21 and a return barrel 22, and the opening 221 of the return barrel 22 faces the second chamber 12.

By providing the reflux bucket 22 in the barrel 10 of the oil barrel, the opening 221 of the reflux barrel 22 faces the second chamber 12, so that the air flow can be reduced in the second chamber 12, sufficiently with the inner wall of the barrel 10 and the second The objects in the chamber 12 are in contact with each other to improve the efficiency of oil and gas separation, solve the problem of low oil efficiency in the prior art, and avoid concentration of airflow in the barrel wall.

As shown in FIG. 2 and FIG. 6, the return bucket 22 is fixedly disposed on the inner wall of the tub body 10. The oil filter screen 21 is sleeved outside the return bucket 22 and covers the cross section of the tub body 10. The oil filter screen 21 is provided with Through hole.

In the present embodiment, the first chamber 11 is located on the side of the tub 10 near the bottom.

Preferably, the oil sub-barrel further includes an exhaust port 31 disposed on the barrel wall of the tub 10 corresponding to the first chamber 11 and communicating with the first chamber 11. The arrangement of the exhaust port 31 corresponding to the first chamber 11 ensures that the air flow must pass through the oil screen 21 before the oil barrel is discharged, thereby ensuring the oil separation effect. Of course, in other embodiments, the exhaust port 31 may also be disposed at the bottom of the tub 10 or the like.

Preferably, the exhaust port 31 is disposed on a side away from the return tub 22 in the cross-sectional direction of the tub 10. This allows the gas to flow longer and the separation better. In the present embodiment, the barrel 10 has a circular cross-sectional shape, the exhaust port 31 is located at one end of the circular diameter, and the recirculation barrel 22 is disposed at the other end of the circular diameter, but the exhaust port 31 and the return bucket 22 is not in the same cross section.

Preferably, the oil drum further includes an injection pipe 40 disposed in the second chamber 12, and the injection port 41 of the injection pipe 40 faces the opening 221 of the return bucket 22. The injection pipe 40 is used to introduce the airflow ejected by the compressor into the recirculation barrel 22, and the injection port 41 of the injection pipe 40 faces the recirculation barrel 22, so that the airflow can enter the recirculation barrel 22 accurately, and is directly injected into the reflow bucket 22 (in this case). In the embodiment, the reflux drum 22 is a bottom of a cylindrical shape.

The area of the opening 221 of the reflow tub 22 is determined according to the area of the ejection port 41. Preferably, the area of the opening 221 of the reflow tub 22 is 2 to 4 times the area of the ejection opening 41 of the ejection tube 40. If the area is too large, it will occupy the area of the oil filter 21 and affect the efficiency of the oil. If it is too small, a large pressure loss will be generated there to affect the energy efficiency.

According to another aspect of the present invention, there is provided a screw compressor including an oil sub-tank which is the above-described oil sub-bucket. By arranging the position of the exhaust port 31 of the oil barrel on the barrel wall of the tub 10, the recirculation barrel 22 that diverts the exhaust flow is increased, and the large space (second chamber 12) on the right side of the oil barrel is fully utilized for mixing. Uniform airflow reduces the concentration of airflow and simultaneously increases the chance of airflow colliding with the wall and the travel of the flow to increase the effect of gravity oil to improve the oil efficiency of the compressor.

As shown in FIGS. 2 and 3, the barrel 10 of the oil barrel is fixedly coupled to the housing of the screw compressor, and the injection tube 40 of the oil barrel is connected to the air outlet of the screw compressor.

When the compressed airflow of the compressor is injected into the return bucket 22, since the trailing end of the return bucket 22 is sealed, the airflow will flow directly from the opening 221 of the return bucket 22, and the flow direction of the airflow has changed after the airflow has flowed out. The air flow directly impinges on various parts of the second chamber 12 of the oil barrel for impact separation. Since the space is relatively complicated and the impact area is large, the oil separation effect is higher than that in the left space (the first chamber 11) of the oil filter 21 when the oil and gas separation is performed. At this time, the compressor airflow flows in the right space (second chamber 12) of the oil filter 21, since the space is relatively large, and there is no guiding effect on the airflow like the inner wall of the left space (first chamber 11). Therefore, the distribution of the airflow in the space (the second chamber 12) will be relatively uniform, and the airflow will not be concentrated in the near wall of the oil drum (the flow rate is large when the airflow is concentrated, and the efficiency of the oil filter is low when the flow velocity is large), thus The oil efficiency at the oil filter 21 is improved. During the flow of the entire airflow, during the flow of the airflow from the opening 221 of the return bucket 22 to the exhaust port 31, the flow of the airflow turns a curve, and thus the stroke of the airflow is longer, which enhances the separation effect of oil and gas generated by gravity. Therefore, the oil efficiency of the compressor can be effectively improved.

The oil drum, screw compressor and air conditioning unit according to the present invention have the following technical effects:

Through the adjustment of the structure of the oil barrel, the large space (second chamber) on the right side of the oil barrel is fully utilized, and the airflow through the oil filter is evenly distributed to reduce the concentration of the airflow, and at the same time, the effect of the airflow and the wall against the oil and gravity oil is increased. To comprehensively improve the oil efficiency of the compressor.

The above description is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Where in the essence of the invention Any modifications, equivalent substitutions, improvements, etc. made within the principles of God and the principles are intended to be included within the scope of the present invention.

Claims

An oil drum, characterized in that it comprises:

a barrel (10) having a receiving cavity;

An oil subassembly, the oil subassembly is disposed in the accommodating chamber, and partitions the accommodating chamber into a first chamber (11) and a second chamber (12), a volume of the first chamber (11) Less than or equal to the volume of the second chamber (12), the oil subassembly includes an oil filter (21) and a return bucket (22), the opening (221) of the reflux bucket (22) facing the second Chamber (12).
The oil drum according to claim 1, wherein the oil drum further comprises an exhaust port (31), wherein the exhaust port (31) is disposed corresponding to the first chamber (11) The barrel wall of the barrel (10) is in communication with the first chamber (11).
The oil drum according to claim 2, characterized in that, in a cross-sectional direction of the tub (10), the exhaust port (31) is disposed on a side away from the recirculation tub (22).
The oil drum according to claim 1, wherein the oil drum further comprises an injection pipe (40), the injection pipe (40) is disposed in the second chamber (12), and the injection The injection port (41) of the tube (40) faces the opening (221) of the recirculation barrel (22).
The oil drum according to claim 4, wherein an area of the opening (221) of the recirculation barrel (22) is 2 to 4 times an area of an injection port (41) of the injection pipe (40) .
The oil drum according to claim 1, wherein the return bucket (22) is fixedly disposed on an inner wall of the tub (10), and the oil filter (21) is sleeved in the reflux bucket (22) Outside, and covering the cross section of the tub (10), the oil filter (21) is provided with a through hole.
The oil drum according to claim 1, characterized in that the first chamber (11) is located on a side of the barrel (10) near the bottom.
A screw compressor, characterized in that the screw compressor comprises an oil drum, and the oil drum is the oil drum according to any one of claims 1 to 7.
The screw compressor according to claim 8, wherein the barrel (10) of the oil barrel is fixedly coupled to the housing of the screw compressor, and the injection tube (40) of the oil barrel is The air outlet of the screw compressor is connected.
An air conditioning unit comprising the screw of claim 8 or 9. Compressor unit.