Oil separator and air conditioning system thereof

Abstract

The utility model relates to the technical field of oil separation, in particular to an oil separator and an air conditioning system thereof. The oil separator comprises a barrel, an air inlet pipe, an air outlet pipe, an oil outlet pipe and a spiral guide plate, a first communication hole is formed in one end of the barrel, a second communication hole is formed in the other end of the barrel, one end of the air outlet pipe extends into the barrel through the first communication hole, one end of the air inlet pipe penetrates through the side wall of the barrel and extends into the barrel, and the oil outlet pipe is communicated with the second communication hole. The spiral guide plate is wound on the peripheral side of the part, positioned in the cylinder, of the air outlet pipe; and one end, extending into the cylinder, of the air inlet pipe is positioned between two axial ends of the spiral guide plate. The gas-liquid separator has the advantages that the spiral guide plate is arranged to guide the flow direction of a refrigerant entering the cylinder through the gas inlet pipe, so that the gas-liquid separation effect is improved, the turbulent flow is reduced, and unnecessary pressure loss caused by disordered flowing paths of the refrigerant is avoided; and the power consumption and the refrigeration efficiency of an air conditioning system mounted on the oil separator are influenced.

Description

Technical Field

[0001] The utility model relates to the technical field of oil separation, in particular to an oil separator and an air conditioning system thereof. Background Art

[0002] The air conditioning compressor needs lubricating oil for lubrication during operation, but the lubricating oil will be discharged along with the refrigerant when the compressor discharges the refrigerant. On the one hand, the presence of lubricating oil will increase the thermal resistance of the air conditioning system pipeline, reduce the heat transfer effect, and thus reduce the cooling or heating efficiency of the air conditioning system; on the other hand, if the lubricating oil is not returned to the compressor in time, the service life of the compressor will be shortened.

[0003] The oil separator is used to separate the lubricating oil and the refrigerant, and the separated lubricating oil is returned to the compressor through the oil outlet pipe. However, the separation efficiency of the existing oil separator is limited. In order to improve the separation efficiency, the method of increasing the volume of the oil separator (increasing the length of the cylinder) is usually adopted. However, such an oil separator occupies a large space and is not convenient for production and assembly. Some oil separators also improve the efficiency of the oil-gas separator by setting a spiral guide plate in the cylinder to guide the flow direction of the refrigerant. However, after the refrigerant enters the cylinder, turbulence is prone to occur and it cannot flow in the drainage direction of the spiral guide plate. Utility Model Content

[0004] Based on this, the utility model provides an oil separator for the above technical problems.

[0005] An oil separator, the oil separator comprising: a cylinder, one end of which is provided with a first communicating hole, and the other end of which is provided with a second communicating hole; an air inlet pipe, one end of which is penetrated through the side wall of the cylinder and extends into the cylinder; an air outlet pipe, one end of which extends into the cylinder through the first communicating hole; an oil outlet pipe, the oil outlet pipe being connected with the second communicating hole; in the cylinder, along the axial direction of the cylinder, a port of the air outlet pipe is located between the port of the air inlet pipe and the second communicating hole;

[0006] A spiral guide plate is disposed around the outer circumference of the portion of the air outlet pipe located within the cylinder; wherein the port at one end of the air inlet pipe extending into the cylinder is located between the two ends of the spiral guide plate in the axial direction.

[0007] With such arrangement, the refrigerant enters the cylinder through the air inlet pipe, and the gas and liquid are separated in the cylinder, and the gas enters the air outlet pipe through the first connecting port and flows to the external pipeline via the air outlet pipe. Since the end of the air inlet pipe extending into the cylinder is located between the two axial ends of the spiral guide plate, the upper and lower flow paths of the refrigerant will be blocked by the spiral guide plate. That is to say, the refrigerant entering the cylinder from the air inlet pipe can enter the spiral guide plate and be guided by the spiral guide plate to flow along the rotation direction of the spiral guide plate to reduce the generation of turbulence, improve the separation efficiency of the oil separator, avoid the pressure drop caused by turbulence and reduce the refrigerant flow rate, thereby affecting the power consumption and refrigeration efficiency of the air-conditioning system where the oil separator is installed.

[0008] In one embodiment, along the radial direction of the cylinder, the distance between the outer peripheral side of the spiral guide plate and the inner wall of the cylinder is X, and X satisfies 0≤X≤3mm.

[0009] In one embodiment, the inner diameter of the cylinder is D, the inner diameter of the pipe opening at one end of the air inlet pipe extending into the cylinder is d, and D≥d / 0.4.

[0010] In one embodiment, the cylinder includes a straight section and tapered sections connected to both axial ends of the straight section, the tapered section at one end is provided with the first connecting hole, and the tapered section at the other end is provided with the second connecting hole.

[0011] In one embodiment, one end of the air inlet pipe extends into the interior of the cylinder through the side wall of the straight cylinder section.

[0012] In one embodiment, the cylinder, the portion of the air outlet pipe inserted into the cylinder, and at least a portion of one end of the oil outlet pipe connected to the cylinder are coaxially arranged.

[0013] In one embodiment, the port of the air inlet pipe extending into one end of the cylinder is arranged at an angle to the axis of the air outlet pipe.

[0014] In one embodiment, the diameter of the portion of the outlet pipe extending into the cylinder remains consistent along the extension direction of the outlet pipe, the diameter of the portion of the inlet pipe extending into the cylinder remains consistent along the extension direction of the inlet pipe, and the diameter of the port of the outlet pipe is greater than or equal to the diameter of the port of the inlet pipe.

[0015] In one embodiment, the spiral guide plate has at least one spiral turn.

[0016] The utility model also provides an air conditioning system, comprising the oil separator as described above.

[0017] Compared with the prior art, the utility model sets a spiral guide plate to guide the flow direction of the refrigerant entering the cylinder through the air inlet pipe, thereby improving its gas-liquid separation effect and reducing its turbulence, avoiding unnecessary pressure loss caused by the disorder of the refrigerant flow path, and affecting the power consumption and refrigeration efficiency of the air-conditioning system where the oil separator is installed. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic structural diagram of one embodiment of the oil separator provided by the utility model;

[0019] Figure 2 A front cross-sectional view of one embodiment of the oil separator provided by the utility model;

[0020] Figure 3 A front cross-sectional view from another angle of one embodiment of the oil separator provided by the utility model;

[0021] Figure 4 A top cross-sectional view of one embodiment of the oil separator provided by the utility model;

[0022] Figure 5 This is a partial structural schematic diagram of one embodiment of the oil separator provided by the utility model.

[0023] The symbols in the figure mean the following:

[0024] 100, oil separator; 10, cylinder; 11, straight section; 12, tapered section; 13, first connecting hole; 14, second connecting hole; 20, air outlet pipe; 30, air inlet pipe; 31, straight pipe portion; 40, spiral guide plate; 50, oil outlet pipe. DETAILED DESCRIPTION

[0025] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0026] It should be noted that when a mechanism is referred to as being "fixed to" or "set on" another mechanism, it may be directly on the other mechanism or there may be a central mechanism. When a mechanism is considered to be "connected to" another mechanism, it may be directly connected to the other mechanism or there may be a central mechanism at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the specification of this application are for illustrative purposes only and do not represent the only implementation method.

[0027] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0028] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first feature is directly in contact with the second feature, or the first feature and the second feature are indirectly in contact through an intermediate medium. Moreover, a first feature being “above”, “above” or “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below” or “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0029] Unless otherwise defined, all technical and scientific terms used in the specification of this application have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in the specification of this application includes any and all combinations of one or more related listed items.

[0030] In order to improve the efficiency of gas-liquid separation in refrigerators, existing oil separators often set spiral guide plates in the cylinder of the oil separator to guide the flow of the refrigerant, thereby improving the efficiency of oil-gas separation. However, after the refrigerant enters the cylinder, turbulence is prone to occur and it cannot flow in the drainage direction of the spiral guide plate.

[0031] The utility model provides an oil separator 100, in which a spiral guide plate 40 is arranged in a cylinder 10, and an air inlet pipe 30 extends into one end of the cylinder 10 to extend between the two axial ends of the spiral guide plate 40 to ensure that the refrigerant can flow along the rotation direction of the spiral guide plate 40, reduce the generation of turbulence, and improve the efficiency of gas-liquid separation.

[0032] See also Figure 1-Figure 5 The oil separator 100 includes a cylinder 10, an air inlet pipe 30, an air outlet pipe 20, a spiral guide plate 40 and an oil outlet pipe 50. A first connecting hole 13 is opened at one end of the cylinder 10, and a second connecting hole 14 is opened at the other end. One end of the air outlet pipe 20 extends into the cylinder 10 through the first connecting hole 13. In the cylinder 10, along the axial direction of the cylinder 10, the port of the air outlet pipe 20 is located between the port of the air inlet pipe 30 and the second connecting hole 14. The oil outlet pipe 50 is connected to the second connecting hole 14. One end of the air inlet pipe 30 passes through the side wall of the cylinder 10 and extends into the cylinder 10. The spiral guide plate 40 is wound around the outer peripheral side of the part of the air outlet pipe 20 located in the cylinder 10. The port of one end of the air inlet pipe 30 extending into the cylinder 10 is located between the two ends of the spiral guide plate 40 in the axial direction. In this way, the refrigerant enters the cylinder 10 through the air inlet pipe 30, and is separated into gas and liquid in the cylinder 10. The gas enters the air outlet pipe 20 through the first connecting port and flows to the external pipeline via the air outlet pipe 20. Since the end of the air inlet pipe 30 extending into the cylinder 10 is located between the two axial ends of the spiral guide plate 40, the upper and lower flow paths of the refrigerant will be blocked by the spiral guide plate 40. That is to say, the refrigerant entering the cylinder 10 from the air inlet pipe 30 can enter the spiral guide plate 40 and be guided by the spiral guide plate 40 to flow along the rotation direction of the spiral guide plate 40 to reduce the generation of turbulence, improve the separation efficiency of the oil separator 100, avoid the pressure drop caused by turbulence and reduce the refrigerant flow rate, thereby affecting the power consumption and refrigeration efficiency of the air-conditioning system where the oil separator 100 is installed.

[0033] See also Figure 4 Furthermore, along the radial direction of the cylinder 10, the distance between the outer circumference of the spiral guide plate 40 and the inner wall of the cylinder 10 is X, and X satisfies 0≤X≤3mm. In this way, the gap between the outer circumference of the spiral guide plate 40 and the inner wall of the cylinder 10 is small, which prevents the refrigerant from flowing toward the gap instead of along the rotation direction of the spiral guide plate 40, causing turbulence and other problems.

[0034] Exemplarily, the value of X may be 3 mm, 2 mm, 1 mm or 0 mm, etc. It should be explained that when X is 0 mm, the spiral guide plate 40 has the best guiding effect on the refrigerant. In order to reduce the processing cost and prevent interference, the value of X is between 0-3 mm.

[0035] Along the axial direction of the cylinder 10 , the spiral guide plate 40 is circular, and the cylinder 10 is also set to be circular, that is, the distance X between the spiral guide plate 40 and the inner wall of the cylinder 10 is equal everywhere, which is convenient for processing.

[0036] See also Figure 2-Figure 3 The inner diameter of the cylinder 10 is D, and the inner diameter of the pipe opening at one end of the air inlet pipe 30 extending into the cylinder 10 is d, satisfying D≥d / 0.4.

[0037] In this way, it is ensured that the cylinder 10 can accommodate the refrigerant entering from the air inlet pipe 30 and perform gas-liquid separation on it, thereby preventing the refrigerant from being squeezed and collided and generating turbulence due to insufficient capacity of the cylinder 10.

[0038] Specifically, the cylinder 10 includes a straight section 11 and tapered sections 12 connected to both ends of the straight section 11, a first communication hole 13 is provided on the tapered section 12 at one end, and a second communication hole 14 is provided on the tapered section 12 at the other end. In this way, the volume of the straight section 11 is relatively large, the constriction formed by the tapered section 12 is convenient for connection with an external pipeline, and the inner wall of the tapered section 12 itself can guide the refrigerant and guide the flow direction of the gas or liquid.

[0039] Furthermore, one end of the air intake pipe 30 extends into the interior of the cylinder body 10 through the side wall of the straight cylinder section 11 . Since the side wall structure of the straight cylinder section 11 is regular, the processing and assembly of the air intake pipe 30 are convenient.

[0040] Of course, in other embodiments, the air inlet pipe 30 may also extend from the side wall of the tapered section 12 into the cylinder 10. The side wall of the tapered section 12 can guide the flow direction of the refrigerant and reduce the turbulence of the refrigerant to avoid a decrease in the pressure of the refrigerant.

[0041] Furthermore, at least part of one end of the air inlet pipe 30 extending into the cylinder 10 is a straight pipe portion 31, and the axis of the straight pipe portion 31 is arranged at an angle with the axis of the air outlet pipe 20. In this way, it is possible to prevent the refrigerant from directly colliding with the air outlet pipe 20 when flowing out of the air inlet pipe 30, causing the refrigerant flow to be turbulent, reducing the flow rate of the refrigerant, and affecting the gas-liquid separation effect. After the straight pipe portion 31 is eccentrically arranged with the air outlet pipe 20, the refrigerant can flow directly along the rotation direction of the spiral guide vane, and its movement path is smoother.

[0042] The cylinder 10, the portion of the gas outlet pipe 20 inserted into the cylinder 10, and at least the portion of one end of the oil outlet pipe 50 connected to the cylinder 10 are coaxially arranged. In this way, since the second communication hole 14 and the first communication hole 13 are respectively located at both ends of the cylinder 10, after the refrigerant is separated from the gas and liquid, the gas flows out from the gas outlet pipe 20, and the liquid sinks to the oil outlet pipe due to its large mass, and the cylinder 10, the gas outlet pipe 20 and the oil outlet pipe 50 are coaxially arranged to facilitate the processing of the oil separator 100.

[0043] The diameter of the portion of the air outlet pipe 20 extending into the cylinder 10 remains consistent along the extension direction of the air outlet pipe 20 , and the diameter of the portion of the air inlet pipe 30 extending into the cylinder 10 remains consistent along the extension direction of the air inlet pipe 30 .

[0044] In other embodiments, the air outlet pipe 20 and the air inlet pipe 30 are both configured as straight pipe structures, that is, the pipe diameters of the air outlet pipe 20 and the air inlet pipe 30 are equal along their length directions, and the pipe diameter of the port of the air outlet pipe 20 is greater than or equal to the pipe diameter of the port of the air inlet pipe 30, thereby ensuring that the air outlet volume of the air outlet pipe 20 is always greater than the air intake volume of the air inlet pipe 30, thereby preventing the refrigerant from accumulating in the cylinder 10 and causing turbulence and pressure loss.

[0045] In this embodiment, the spiral guide plate 40 has at least one spiral turn to ensure the guiding effect of the spiral guide plate 40 on the refrigerant.

[0046] Preferably, in this embodiment, the number of spiral turns of the spiral guide plate 40 is three, so as to take into account the processing and material costs as well as the guiding effect on the refrigerant. The direction from the first connecting hole 13 to the second connecting hole 14 is defined as the direction from top to bottom, and the spiral guide plate 40 includes a first layer, a second layer and a third layer from top to bottom. In this embodiment, the straight pipe portion 31 of the air inlet pipe 30 extends between the first layer and the second layer, and the upward movement of the refrigerant is limited by the first layer stopper, and the downward movement of the refrigerant is limited by the second layer stopper, so the refrigerant can flow along the path space formed between the first layer and the second layer, and the spiral guide plate guides the refrigerant in this way.

[0047] In other embodiments, it may also be set to two circles, four circles, five circles, etc.

[0048] The utility model also provides an air conditioning system, comprising the oil separator 100 as described above.

[0049] Compared with the prior art, the utility model sets a spiral guide plate 40 to guide the flow direction of the refrigerant entering the cylinder 10 through the air inlet pipe 30, thereby improving its gas-liquid separation effect and reducing its turbulence, avoiding the disorder of the refrigerant flow path and causing unnecessary pressure loss, affecting the power consumption and refrigeration efficiency of the air-conditioning system where the oil separator 100 is installed.

[0050] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0051] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. An oil separator, characterized in that: The oil separator comprises: A cylinder (10), wherein a first communication hole (13) is formed at one end of the cylinder (10), and a second communication hole (14) is formed at the other end of the cylinder (10); an air intake pipe (30), one end of which is passed through the side wall of the cylinder (10) and extends into the cylinder (10); an air outlet pipe (20), one end of the air outlet pipe (20) extending into the cylinder (10) through the first connecting hole (13); an oil outlet pipe (50), the oil outlet pipe (50) being in communication with the second communication hole (14); In the cylinder (10), along the axial direction of the cylinder (10), the port of the air outlet pipe (20) is located between the port of the air inlet pipe (30) and the second communication hole (14); a spiral guide plate (40), the spiral guide plate (40) being arranged around the outer circumference of the portion of the air outlet pipe (20) located inside the cylinder (10); Wherein, the port at one end of the air inlet pipe (30) extending into the cylinder (10) is located between the two ends of the spiral guide plate (40) in the axial direction.

2. The oil separator according to claim 1, characterized in that: Along the radial direction of the cylinder (10), the distance between the outer peripheral side of the spiral guide plate (40) and the inner wall of the cylinder (10) is X, and X satisfies 0≤X≤3mm.

3. The oil separator according to claim 1, characterized in that: The inner diameter of the cylinder (10) is D, and the inner diameter of the pipe opening at one end of the air inlet pipe (30) extending into the cylinder (10) is d, where D≥d / 0.

4.

4. The oil separator according to claim 1, characterized in that: The cylinder (10) comprises a straight section (11) and tapered sections (12) connected to the two axial ends of the straight section (11); the tapered section (12) at one end is provided with the first connecting hole (13), and the tapered section (12) at the other end is provided with the second connecting hole (14).

5. The oil separator according to claim 4, characterized in that: One end of the air inlet pipe (30) extends into the interior of the cylinder (10) through the side wall of the straight cylinder section (11).

6. The oil separator according to claim 5, characterized in that: The cylinder (10), the portion of the air outlet pipe (20) inserted into the cylinder (10), and at least a portion of one end of the oil outlet pipe (50) connected to the cylinder (10) are coaxially arranged.

7. The oil separator according to claim 1, characterized in that: The axis of the port of the air inlet pipe (30) extending into one end of the cylinder (10) is arranged at an angle to the axis of the air outlet pipe (20).

8. The oil separator according to claim 1, characterized in that: The diameter of the portion of the air outlet pipe (20) extending into the cylinder (10) remains consistent along the extension direction of the air outlet pipe (20), the diameter of the portion of the air inlet pipe (30) extending into the cylinder (10) remains consistent along the extension direction of the air inlet pipe (30), and the diameter of the port of the air outlet pipe (20) is greater than or equal to the diameter of the port of the air inlet pipe (30).

9. The oil separator according to claim 1, characterized in that: The spiral guide plate (40) has at least one spiral turn.

10. An air conditioning system, characterized in that: Comprising the oil separator as described in any one of claims 1-9.

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