CN221122598U - Oil separator and air conditioning system thereof - Google Patents

Abstract

The utility model relates to the technical field of oil separation, in particular to an oil separator and an air conditioning system thereof. An oil separator comprising: the device comprises a cylinder body, an oil return pipe, an air inlet pipe and a spiral guide plate, wherein a first communication hole is formed in one end of the cylinder body; one end of the oil return pipe is inserted into the first communication hole and is connected with the cylinder body through the first communication hole; one end of the air inlet pipe penetrates through the side wall of the cylinder body and extends into the cylinder body; the spiral guide plate is arranged in the cylinder body and spirally extends around the axis of the cylinder body towards the direction of the first communication hole; the spiral guide plate is located between one end of the air inlet pipe extending into the cylinder body and the first communication hole along the axial direction of the cylinder body. The oil-gas separation device has the advantages that by arranging the spiral guide plate, after the refrigerant enters the cylinder body, the refrigerant can flow along the rotation direction of the spiral guide plate, and then the oil-gas separation effect is improved.

Description

Oil separator and air conditioning system thereof

Technical Field

The utility model relates to the technical field of oil separation, in particular to an oil separator and an air conditioning system thereof.

Background

Lubricating oil is required for the operation of an air conditioning compressor, but is discharged with the refrigerant as the compressor discharges the refrigerant. On one hand, the existence of the lubricating oil can increase the thermal resistance of the pipeline of the air conditioning system and reduce the heat transfer effect, thereby reducing the refrigeration or heating efficiency of the air conditioning system; on the other hand, if the lubricating oil does not return to the compressor in time, the service life of the compressor is shortened.

The oil separator is used for separating lubricating oil and refrigerant and returning the separated lubricating oil to the compressor through an oil return pipe. However, the conventional oil separator has a limited separation efficiency, and in order to improve the separation efficiency, a method of increasing the volume of the oil separator (increasing the length of the cylinder) is generally adopted, but such an oil separator occupies a large space, and is inconvenient to produce and assemble.

Disclosure of utility model

In view of the above, the present utility model provides an oil separator and an air conditioning system thereof that are advantageous for improving separation efficiency.

An oil separator, the oil separator comprising: a cylinder body, wherein one end of the cylinder body is provided with a first communication hole; the oil return pipe is inserted into the first communication hole at one end and is connected with the cylinder body through the first communication hole; one end of the air inlet pipe penetrates through the side wall of the cylinder body and extends into the cylinder body; the spiral guide plate is arranged in the cylinder body and spirally extends around the axis of the cylinder body in the direction of the first communication hole; along the axial direction of the cylinder, the spiral guide plate is positioned between one end of the air inlet pipe extending into the cylinder and the first communication hole.

By arranging the spiral guide plate, after the refrigerant enters the cylinder, the refrigerant can flow along the rotation direction of the spiral guide plate, so that turbulent flow and other conditions are avoided, and the oil-gas separation efficiency is higher.

In one embodiment, a second communication hole is formed in one end, away from the first communication hole, of the cylinder, and the oil separator further comprises an air outlet pipe, wherein one end of the air outlet pipe penetrates through the second communication hole and stretches into the cylinder, and the air outlet pipe is connected with the cylinder through the second communication hole;

the spiral guide plate is wound on the outer peripheral side of the air outlet pipe extending into the barrel body.

In one embodiment, the end of the air inlet pipe extending into the cylinder body is provided with a guide surface, and the guide surface is obliquely arranged along the rotation direction of the spiral guide plate.

In one embodiment, the oil return pipe at least comprises a straight pipe section connected with the first communication hole, the straight pipe section, the air outlet pipe and the cylinder body are coaxially arranged, and the axis of the air inlet pipe and the axis of the air outlet pipe are mutually perpendicular and intersected.

In one embodiment, the shortest distance between one end of the air inlet pipe, which is close to the axis of the cylinder, and the air outlet pipe is h, and the range of h is: h is more than or equal to 1mm and less than or equal to 10mm.

In one embodiment, along the axial direction of the cylinder, the distance between the air inlet pipe and the spiral guide plate is H, the distance between the air inlet pipe and one end of the air outlet pipe away from the first communication hole is b, the diameter of the air inlet pipe is a, and the range of H is: a/2 is less than or equal to H and less than b.

In one embodiment, along the radial direction of the cylinder, the outer diameter of the spiral guide plate is D, the inner diameter of the cylinder is D, and 0.6D.ltoreq.d.ltoreq.D is satisfied between the two.

In one embodiment, the number of turns of the spiral deflector is at least one, one end of the spiral deflector, which is close to the first communication hole, is a head, and the head is located on the back side of the guide surface along the radial direction of the cylinder.

In one embodiment, the oil separator further comprises a filter screen, one end of the filter screen is mounted at the joint of the oil return pipe and the cylinder body, at least part of the filter screen is located in the oil return pipe, the filter screen protrudes along the axial direction of the cylinder body towards the direction away from the cylinder body to form a filter tank, and an opening of the filter tank faces towards the direction close to the cylinder body.

The utility model also provides an air conditioning system comprising the oil separator.

Compared with the prior art, the utility model has the advantages that the spiral guide plate is arranged, so that the refrigerant can flow along the rotation direction of the spiral guide plate after entering the cylinder, the oil-gas separation effect is improved, and the guide surface is obliquely arranged along the rotation direction of the spiral guide plate, so that the refrigerant can enter the guide area of the spiral guide plate along the oblique direction of the guide surface, the occurrence of turbulent flow and the like is avoided, and the oil-gas separation efficiency is higher. The filter screen is additionally arranged to prevent impurities from entering the compressor through the oil return pipe, so that the service life of the compressor is reduced.

Drawings

Fig. 1 is a schematic structural view of an oil separator provided by the utility model;

fig. 2 is a front cross-sectional view of an oil separator provided by the present utility model;

fig. 3 is a top cross-sectional view of an oil separator provided by the present utility model.

The symbols in the drawings are as follows:

100. An oil separator; 10. a cylinder; 11. a first communication hole; 12. a second communication hole; 20. an oil return pipe; 21. a straight pipe section; 22. a curved pipe section; 30. an air inlet pipe; 31. a guide surface; 40. a spiral deflector; 50. a filter screen; 51. a filter tank; 60. and an air outlet pipe.

Detailed Description

In order that the above objects, features and advantages of the application will be readily understood, a more particular description of the application will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. The present application may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the application, whereby the application is not limited to the specific embodiments disclosed below.

It is noted that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an mechanism is considered to be "connected" to another mechanism, it may be directly connected to the other mechanism or there may be a centering mechanism present at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and the like are used in the description of the present application for the purpose of illustration only and do not represent the only embodiment.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present application, unless expressly stated or limited otherwise, a first feature "up" or "down" on a second feature may be that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact through intermedial media. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely under the second feature, or simply indicating that the first feature is less level than the second feature.

Unless defined otherwise, all technical and scientific terms used in the specification of the present application have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and/or" as used in the description of the present application includes any and all combinations of one or more of the associated listed items.

Lubricating oil is required for the operation of an air conditioning compressor, but is discharged with the refrigerant as the compressor discharges the refrigerant. On one hand, the existence of the lubricating oil can increase the thermal resistance of the pipeline of the air conditioning system and reduce the heat transfer effect, thereby reducing the refrigeration or heating efficiency of the air conditioning system; on the other hand, if the lubricating oil does not return to the compressor in time, the service life of the compressor is shortened.

The oil separator is used for separating lubricating oil and refrigerant and returning the separated lubricating oil to the compressor through an oil return pipe. However, the conventional oil separator has a limited separation efficiency, and a method of increasing the volume of the oil separator is generally adopted to improve the separation efficiency, but such an oil separator occupies a large space and is inconvenient to produce and assemble.

Referring to fig. 1-3, in order to solve the problem of low separation efficiency of the conventional oil separator 100, the present application provides an oil separator 100 for separating lubricating oil and refrigerant.

The oil separator 100 includes a cylinder 10, an oil return pipe 20, an air inlet pipe 30 and a spiral deflector 40, wherein a first communication hole 11 is formed at one end of the cylinder 10, one end of the oil return pipe 20 is inserted into the first communication hole 11 and connected with the cylinder 10 through the first communication hole 11, one end of the air inlet pipe 30 penetrates through the side wall of the cylinder 10 and extends into the cylinder 10, the spiral deflector 40 is installed in the cylinder 10 and extends spirally around the axis of the cylinder 10 in the direction of the first communication hole 11, and the spiral deflector 40 is located between one end of the air inlet pipe 30 extending into the cylinder 10 and the first communication hole 11 along the axial direction of the cylinder 10.

According to the application, the spiral guide plate 40 is arranged, so that the refrigerant can flow along the rotation direction of the spiral guide plate 40 after entering the cylinder 10, the occurrence of turbulent flow and other conditions is avoided, and the oil-gas separation efficiency is higher.

The end of the air inlet pipe 30 extending into the cylinder 10 has a guide surface 31, and the guide surface 31 is inclined along the rotation direction of the spiral guide plate 40, so that the refrigerant is facilitated to enter the guide area of the spiral guide plate 40 along the inclined direction of the guide surface 31.

Further, a second communication hole 12 is formed at one end of the cylinder 10 away from the first communication hole 11, the oil-gas separator further comprises an air outlet pipe 60, one end of the air outlet pipe 60 penetrates through the second communication hole 12 and stretches into the cylinder 10, the air outlet pipe 60 is connected with the cylinder 10 through the second communication hole 12, and the spiral guide plate 40 is wound on the outer peripheral side of the part of the air outlet pipe 60 stretching into the cylinder 10. Thus, the spiral guide plate 40 is not required to be installed in the cylinder 10 through other additional structures, but can be directly connected to the outer peripheral side of the air outlet pipe 60, so that the limit fixation of the spiral guide plate is realized, and the structure is simplified.

Of course, in other embodiments, the spiral baffle 40 may be connected to the inner wall of the cylinder 10 by other connection structures, not limited to being directly connected to the outer peripheral side of the air outlet pipe 60.

Further, the oil return pipe 20 includes at least a straight pipe section 21 connected to the first communication hole 11, the straight pipe section 21, the air outlet pipe 60 and the cylinder 10 are coaxially disposed, and the axis of the air inlet pipe 30 and the axis of the air outlet pipe 60 are perpendicular to each other and intersect. In this way, when the refrigerant enters the cylinder 10 from the air inlet pipe 30, the refrigerant directly collides with the air outlet pipe 60 and is subjected to spiral circumferential separation movement by the spiral guide plate 40, which is beneficial to separating gas and liquid, thereby improving the gas-liquid separation effect of the oil separator 100.

The return line 20 further comprises a bend section 22 connected to the straight section 21, the bend section 22 extending away from the cylinder 10 for connection to an external line.

It can be appreciated that the axis of the air inlet pipe 30 may not intersect the axis of the air outlet pipe 60, but rather is arranged eccentrically, i.e. the air inlet pipe 30 is arranged eccentrically relative to the cylinder 10, so that when the refrigerant enters the cylinder 10 from the air inlet pipe 30, the refrigerant is spirally separated around the inner wall of the cylinder 10, and the secondary spiral circumferential separation motion is performed under the action of the spiral guide plate 40, thereby improving the gas-liquid separation effect.

Further, referring to fig. 3, the shortest distance between the end of the air inlet pipe 30 near the axis of the cylinder 10 and the air outlet pipe 60 is h, and the range of h is: h is more than or equal to 1mm and less than or equal to 10mm. It should be noted that, the shortest distance h herein refers to the shortest distance between the projection of the guiding surface 31 of the air inlet pipe 30 on a plane and the tangent of the projection of the outer peripheral wall of the air outlet pipe 60 on the plane. By the arrangement, the refrigerant is prevented from directly rebounding back into the air inlet pipe 30 after impacting and colliding with the air outlet pipe 60 due to the fact that the distance between the air inlet pipe 30 and the air outlet pipe 60 is too small, and the refrigerant is prevented from falling due to the fact that the refrigerant does not collide with the pipe wall of the air outlet pipe 60 or is prevented from falling due to incomplete collision due to the fact that the distance between the air inlet pipe 30 and the air outlet pipe 60 is too large.

Specifically, the value of h may be 1mm, 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, etc. Of course, the value of h can be selected in the range according to the requirement.

Referring to FIG. 1, along the radial direction of the cylinder 10, the outer diameter of the spiral deflector 40 is D, the inner diameter of the cylinder 10 is D, and D is 0.6 D.ltoreq.d. In this way, the dimension of the spiral baffle 40 in the radial direction of the cylinder 10 is ensured to be large enough to ensure the flow guiding effect on the refrigerant. When the diameter D of the spiral deflector 40 is equal to the inner diameter D of the cylinder 10, the outer wall of the spiral deflector 40 abuts against the inner wall of the cylinder 10, and the size of the spiral deflector 40 is maximized.

Referring to fig. 2, along the axial direction of the cylinder 10, the distance between the air inlet pipe 30 and the spiral guide plate 40 is H, the distance between the air inlet pipe 30 and one end of the air outlet pipe 60 away from the first communication hole 11 is b, the diameter of the air inlet pipe 30 is a, and the range of H is: a/2 is less than or equal to H and less than b. Thus, a/2.ltoreq.H can ensure that when the secondary nozzle in the air inlet pipe 30 enters the cylinder 10, the secondary nozzle is not blocked due to too close distance between the secondary nozzle and the spiral guide plate 40, and the spiral guide plate 40 cannot play a role due to too far distance between the secondary nozzle and the spiral guide plate 40.

Of course, in other embodiments, if the overall size of the oil separator 100 is greatly changed, the shortest distance H between the end of the air inlet pipe 30 near the axis of the cylinder 10 and the air outlet pipe 60, and the distance H between the air inlet pipe 30 and the spiral baffle 40 should not be limited to the above range, but should be flexibly adjusted according to the working requirements.

The spiral guide plate 40 has at least one spiral turn, and one end of the spiral guide plate 40 near the first communication hole 11 is a head portion located on the back side of the guide surface 31 in the radial direction of the cylinder 10. It should be noted that, the direction in which the guiding surface 31 faces is the front side of the guiding surface 31, and the opposite direction is the back side of the guiding surface 31, and the head is located at the back side of the guiding surface 31, so that the refrigerant can be guaranteed to fall onto the spiral guide plate 40 after flowing out from the guiding surface 31, and therefore the whole spiral guide plate 40 can be fully utilized, and the refrigerant cannot fall directly onto the bottom end of the next spiral guide plate 40 or the cylinder 10.

The spiral deflector 40 has at least one spiral turn, which can ensure the flow guiding effect and gas-liquid separation effect on the refrigerant. Illustratively, in the present embodiment, the spiral number of turns of the spiral baffle 40 is three, and in other embodiments, two turns, four turns, five turns, or the like may be provided.

The oil separator 100 further includes a filter screen 50, one end of the filter screen 50 is installed at the connection between the oil return pipe 20 and the cylinder 10, at least part of the filter screen 50 is located in the oil return pipe 20, the filter screen 50 protrudes along the axial direction of the cylinder 10 towards the direction away from the cylinder 10 to form a filter tank 51, and the opening of the filter tank 51 faces towards the direction close to the cylinder 10. Thus, the filter screen 50 can filter impurities in the lubricating oil, prevent the impurities from entering the compressor through the oil return pipe 20, and reduce the service life of the compressor. Moreover, the opening direction of the filter tank 51 is the direction towards the cylinder 10, that is to say, lubricating oil can enter the filter tank 51 through the opening of the filter tank 51, and is influenced by the structure of the filter screen 50, the filter screen 50 is not easy to deform under the pressure action of lubricating oil, the condition that the filter screen 50 is easy to generate concave deformation towards the inside of the filter tank 51 due to the extrusion of lubricating oil is avoided, so that the filtering area of the filter screen 50 is effectively ensured, and the filtering effect of the filter screen 50 is improved.

Further, the inner diameter of the filter screen 50 tends to decrease in the axial direction of the cylinder 10 and in the direction from the cylinder 10 to the oil return pipe 20, thereby improving the filtering effect of the filter screen 50.

The present utility model also provides an air conditioning system including the oil separator 100 as described above.

Compared with the prior art, the utility model has the advantages that the spiral guide plate 40 is arranged, so that the refrigerant can flow along the rotation direction of the spiral guide plate 40 after entering the cylinder 10, the oil-gas separation effect is further improved, and the guide surface 31 is obliquely arranged along the rotation direction of the spiral guide plate 40, so that the refrigerant can enter the guide area of the spiral guide plate 40 along the oblique direction of the guide surface 31, the occurrence of turbulent flow and the like is avoided, and the oil-gas separation efficiency is higher. A filter screen 50 is additionally provided to prevent impurities from entering the compressor through the oil return pipe 20, and reduce the service life of the compressor.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims (10)

1. An oil separator, characterized in that the oil separator comprises:

A cylinder (10), wherein a first communication hole (11) is formed at one end of the cylinder (10);

An oil return pipe (20), wherein one end of the oil return pipe (20) is inserted into the first communication hole (11) and is connected with the cylinder (10) through the first communication hole (11);

The air inlet pipe (30), one end of the air inlet pipe (30) penetrates through the side wall of the cylinder body (10) and stretches into the cylinder body (10);

A spiral deflector (40) which is installed in the cylinder (10), surrounds the axis of the cylinder (10), and extends spirally in the direction of the first communication hole (11);

wherein, along the axial direction of the cylinder (10), the spiral guide plate (40) is positioned between one end of the air inlet pipe (30) extending into the cylinder (10) and the first communication hole (11).

2. The oil separator according to claim 1, wherein a second communication hole (12) is formed in one end of the cylinder (10) away from the first communication hole (11), the oil separator further comprises an air outlet pipe (60), one end of the air outlet pipe (60) extends into the cylinder (10) through the second communication hole (12), and the air outlet pipe (60) is connected with the cylinder (10) through the second communication hole (12);

the spiral guide plate (40) is wound on the outer peripheral side of the part, extending into the cylinder body (10), of the air outlet pipe (60).

3. An oil separator according to claim 2, wherein the end of the air inlet pipe (30) extending into the cylinder (10) has a guide surface (31), the guide surface (31) being inclined along the direction of rotation of the spiral baffle (40).

4. -Oil separator according to claim 3, characterised in that the oil return pipe (20) comprises at least a straight pipe section (21) connected to the first communication hole (11), the straight pipe section (21), the air outlet pipe (60) and the cylinder (10) being coaxially arranged, the axis of the air inlet pipe (30) and the axis of the air outlet pipe (60) being mutually perpendicular and intersecting.

5. -Oil separator according to claim 3, characterised in that the shortest distance between the end of the inlet pipe (30) close to the axis of the cylinder (10) and the outlet pipe (60) is h, in the range: h is more than or equal to 1mm and less than or equal to 10mm.

6. An oil separator according to claim 2, wherein, along the axial direction of the cylinder (10), the distance between the air intake pipe (30) and the spiral baffle (40) is H, the distance between the air intake pipe (30) and the end of the air outlet pipe (60) remote from the first communication hole (11) is b, the diameter of the air intake pipe (30) is a, and the range of H is: a/2 is less than or equal to H and less than b.

7. An oil separator according to claim 1, wherein the outer diameter of the spiral baffle (40) is D and the inner diameter of the cylinder (10) is D along the radial direction of the cylinder (10), and D is 0.6 d.ltoreq.d therebetween.

8. -Oil separator according to claim 3, characterised in that the number of turns of the spiral deflector (40) is at least one, the end of the spiral deflector (40) close to the first communication hole (11) being a head, which is located on the rear side of the guide surface (31) in the radial direction of the cylinder (10).

9. An oil separator according to any one of claims 1-8, further comprising a filter screen (50), wherein one end of the filter screen (50) is mounted at the junction of the oil return pipe (20) and the cylinder (10), at least part of the filter screen (50) is located in the oil return pipe (20), and the filter screen (50) protrudes along the axial direction of the cylinder (10) in a direction away from the cylinder (10) to form a filter tank (51), and the opening of the filter tank (51) faces in a direction close to the cylinder (10).

10. An air conditioning system comprising an oil separator as claimed in any one of claims 1 to 9.