Oil separator and air conditioning system
By setting up throttling parts in the oil separator and opening throttling holes, the problem of poor oil return caused by welding of the return oil pipe and capillary tube is solved, and the stable return of lubricating oil and reliable lubrication of the compressor are achieved.
Patent Information
- Application Number
- CN202422023762.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-20
- Publication Date
- 2025-09-05
- Estimated Expiration
- 2034-08-20
AI Technical Summary
The welded structure of the oil return pipe and capillary pipe of the existing oil separator can easily cause poor oil return, resulting in poor lubrication of the compressor.
A throttling member is used and a throttling hole is opened on it to increase the flow rate of lubricating oil through the throttling effect, reduce the oil return pressure, cancel the capillary connection, and ensure the stability of oil return.
The reflow speed of lubricant oil is increased, the return oil pressure is reduced, and the poor return oil is avoided due to welding or impact deformation of the capillary tube is prevented, ensuring the stable and reliable oil return effect of the oil separator.
Smart Images
Figure CN223307130U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of oil separation, and in particular to an oil separator and an air conditioning system. Background Art
[0002] The oil separator is an important component in the air conditioning system. It is often used to separate the refrigerant and lubricating oil, and allow the lubricating oil to flow back to the compressor through the return oil pipe, while allowing the refrigerant to enter the condenser for heat exchange.
[0003] In related technologies, because compressor work increases oil return pressure, a capillary tube is often connected between the oil return pipe and the compressor's oil return port. This reduces pressure and speed through the capillary tube, thereby lowering the oil return pressure. However, if the capillary tube's diameter is too small, it is prone to breakage or deformation due to impact. Furthermore, welding to the oil return pipe can easily cause weld blockage, all of which can lead to poor oil return. Utility Model Content
[0004] Based on this, it is necessary to provide an oil separator and an air conditioning system to solve the problem that the oil return pipe and the capillary tube welding structure of the existing oil separator are prone to poor oil return.
[0005] The present application provides an oil separator, which includes a cylinder, an oil return pipe and a throttling device. The cylinder is provided with a accommodating chamber and an oil return hole connected to the accommodating chamber. The oil return pipe is connected to the cylinder, and the oil return pipe is connected to the accommodating chamber through the oil return hole. The throttling device is arranged in the cylinder or the oil return pipe, and a throttling hole is provided on the throttling device. The throttling hole is connected to the accommodating chamber, the oil return hole and the oil return pipe.
[0006] In one embodiment, the inner diameter A of the throttle hole and the inner diameter B of the oil return pipe satisfy 0.005≤A / B≤0.8.
[0007] In one embodiment, the length L of the throttle hole satisfies 1mm≤L≤10mm.
[0008] In one embodiment, a liquid inlet is further provided on the throttling member, and the liquid inlet is connected to the accommodating cavity and the throttling hole respectively; wherein, along the axial direction of the throttling member and in the direction from the liquid inlet to the throttling hole, the flow area of the liquid inlet tends to gradually decrease.
[0009] In one embodiment, a liquid outlet is further provided on the throttling element, and the liquid outlet is respectively connected to the throttling hole and the oil return pipe; wherein, along the axial direction of the throttling element and in the direction from the throttling hole to the liquid outlet, the flow area of the liquid outlet tends to gradually increase.
[0010] In one embodiment, the throttling member is disposed in the oil return hole and connected to the cylinder.
[0011] In one embodiment, the oil separator further includes a filter element, which is installed in the cylinder and located on a side of the throttling element away from the oil return pipe; wherein the accommodating cavity is connected to the oil return hole, the throttling hole and the oil return pipe through the filter element.
[0012] In one embodiment, a positioning portion is formed on the inner wall of the oil return hole, and the filter element includes a filter screen and a fixing portion. The fixing portion is connected to the filter screen, and the fixing portion abuts against the positioning portion along the axial direction.
[0013] In one embodiment, one end of the oil return pipe is inserted into the oil return hole, and the end of the oil return pipe inserted into the oil return hole abuts against the throttling element; wherein, the end of the throttling element away from the oil return pipe abuts against the filter element.
[0014] The present application also provides an air-conditioning system, which includes a compressor and the oil separator described in any one of the above embodiments, wherein the oil separator is connected to the compressor.
[0015] Compared to existing technologies, the oil separator and air conditioning system provided in this application utilize a throttling element and a throttling hole within the throttling element to achieve a throttling effect, thereby increasing the flow rate of the returning lubricating oil and reducing the return oil pressure. This eliminates the capillary tube connected to the oil return pipe in conventional structures, avoiding poor oil return caused by deformation of the capillary tube due to welding or impact. The oil separator's oil return is more stable and reliable, effectively resolving the issue of poor lubrication in the compressor caused by insufficient oil return. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the conventional technology, the following briefly introduces the drawings required for use in the embodiments or the conventional technology descriptions. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.
[0017] Figure 1 A schematic structural diagram of an oil separator according to an embodiment of the present application;
[0018] Figure 2 A cross-sectional view of an oil separator according to an embodiment of the present application;
[0019] Figure 3 for Figure 2 Enlarged view of point C in the middle.
[0020] The symbols in the figure mean the following:
[0021] 100. Oil separator; 10. Cylinder; 101. Accommodating chamber; 102. Oil return hole; 11. Positioning portion; 20. Oil return pipe; 30. Throttle element; 301. Throttle hole; 302. Liquid inlet; 303. Liquid outlet; 40. Filter element; 41. Filter screen; 42. Fixing portion; 50. Air inlet pipe; 60. Air outlet pipe. DETAILED DESCRIPTION
[0022] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.
[0023] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it may be directly on the other component or there may be a central component. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may be a central component 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.
[0024] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.
[0025] In this application, unless otherwise expressly specified or 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 that the first feature and the second feature are indirectly in contact through an intermediate medium. Furthermore, 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.
[0026] Unless otherwise defined, all technical and scientific terms used in the specification of this application have the same meaning as 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 of the relevant listed items.
[0027] The oil separator is an important component in the air conditioning system. It is often used to separate the refrigerant and lubricating oil, and allow the lubricating oil to flow back to the compressor through the return oil pipe, while allowing the refrigerant to enter the condenser for heat exchange.
[0028] In related technologies, because compressor work increases oil return pressure, a capillary tube is often connected between the oil return pipe and the compressor's oil return port. This reduces pressure and speed through the capillary tube, thereby lowering the oil return pressure. However, if the capillary tube's diameter is too small, it is prone to breakage or deformation due to impact. Furthermore, welding to the oil return pipe can easily cause weld blockage, all of which can lead to poor oil return.
[0029] See also Figure 1-Figure 3 To address the problem of poor oil return caused by the welded structure of the oil return pipe and capillary tube in existing oil separators, the present application provides an oil separator 100. The oil separator 100 includes a barrel 10, an oil return pipe 20, and a throttle member 30. The barrel 10 defines a receiving chamber 101 and an oil return hole 102 communicating with the receiving chamber 101. The oil return pipe 20 is connected to the barrel 10 and communicates with the receiving chamber 101 through the oil return hole 102. The throttle member 30 is disposed within the barrel 10 or the oil return pipe 20 and defines a throttle hole 301. The throttle hole 301 communicates with the receiving chamber 101, the oil return hole 102, and the oil return pipe 20.
[0030] It is understood that by providing a throttle member 30 and opening a throttle hole 301 therein, the present application can utilize the throttle hole 301 to achieve a throttling effect, thereby increasing the flow rate of the returning lubricating oil and reducing the return oil pressure. This eliminates the capillary tube connected to the oil return pipe 20 in the conventional structure, avoiding poor oil return caused by deformation of the capillary tube due to welding or impact. The oil separator 100 achieves a more stable and reliable oil return, effectively resolving the problem of poor lubrication caused by insufficient oil return in the compressor.
[0031] In one embodiment, the inner diameter A of the throttle hole 301 and the inner diameter B of the oil return pipe 20 satisfy 0.005≤A / B≤0.8. In this way, the flow area of the throttle hole 301 is reasonably set, which can ensure the oil return effect of the oil separator 100.
[0032] Specifically, if A / B > 0.8, the inner diameter of the orifice 301 is too large, resulting in insufficient resistance to the lubricating oil, which is not conducive to reducing the return oil pressure. If A / B < 0.005, the inner diameter of the orifice 301 is too small, resulting in excessive resistance to the lubricating oil and easy clogging, which is not conducive to the smooth flow of the lubricating oil.
[0033] For example, the value of A / B may be 0.005, 0.1, 0.3, 0.5 or 0.8, etc., which are not listed here one by one.
[0034] Furthermore, in one embodiment, the length L of the throttle hole 301 satisfies 1 mm ≤ L ≤ 10 mm, thereby further balancing the resistance of the throttle hole 301 to the lubricating oil.
[0035] Specifically, if L > 10 mm, the orifice 301 is relatively long, creating excessive resistance to the lubricating oil and affecting the oil return system. If L < 1 mm, the orifice 301 is relatively short, creating insufficient resistance to the lubricating oil and easily leading to excessive oil return pressure, affecting the pressure balance of the compressor oil return pipe 20.
[0036] For example, the value of L may be 1 mm, 3 mm, 5 mm, 7 mm or 10 mm, etc., which are not listed here one by one.
[0037] In one embodiment, if Figure 3 As shown, the throttle member 30 is further provided with a liquid inlet 302, which is connected to the accommodating cavity 101 and the throttle hole 301. In the axial direction of the throttle member 30, and in the direction from the liquid inlet 302 to the throttle hole 301, the flow area of the liquid inlet 302 tends to gradually decrease.
[0038] In this way, the liquid inlet 302 can have a drainage effect on the lubricating oil. At the same time, as the flow area of the liquid inlet 302 decreases, the flow rate of the lubricating oil can be further increased.
[0039] Furthermore, in one embodiment, the throttle member 30 is further provided with a liquid outlet 303, which is connected to the throttle hole 301 and the oil return pipe 20. The flow area of the liquid outlet 303 gradually increases along the axial direction of the throttle member 30 and from the throttle hole 301 to the liquid outlet 303.
[0040] In this way, the lubricating oil flowing out of the throttle hole 301 can be guided and buffered, and the flow of the lubricating oil is more stable, thereby avoiding turbulence and reducing noise.
[0041] In one embodiment, if Figure 2 and Figure 3As shown, the throttle member 30 is disposed in the oil return hole 102 and connected to the cylinder 10. By disposing the throttle member 30 in the oil return hole 102, the size of the throttle member 30 can be reduced, thereby reducing material costs.
[0042] Furthermore, in one embodiment, the throttle member 30 is welded or interference-connected to the cylinder 10. Thus, the connection between the throttle member 30 and the cylinder 10 is simple and easy to process.
[0043] In order to prevent impurities in the lubricating oil from entering the throttle hole 301 and causing blockage, in one embodiment, the oil separator 100 also includes a filter element 40, which is installed in the cylinder 10 and is located on the side of the throttle element 30 away from the oil return pipe 20, wherein the accommodating chamber 101 is connected to the oil return hole 102, the throttle hole 301 and the oil return pipe 20 through the filter element 40.
[0044] In one embodiment, if Figure 3 As shown, the inner wall of the oil return hole 102 is formed with a positioning portion 11. The filter element 40 includes a filter screen 41 and a fixing portion 42. The fixing portion 42 is connected to the filter screen 41 and axially abuts the positioning portion 11. This ensures that the filter element 40 is positioned and installed, preventing the filter element 40 from falling out of the oil return hole 102 and into the accommodating cavity 101, thereby ensuring the reliability of the filtering effect.
[0045] Specifically, an inner wall of the oil return hole 102 close to one end of the accommodating cavity 101 is protruded toward the axis to form an annular step, and the annular step forms the above-mentioned positioning portion 11.
[0046] Furthermore, in one embodiment, Figure 3 As shown, one end of the oil return pipe 20 is inserted into the oil return hole 102, and the end of the oil return pipe 20 inserted into the oil return hole 102 abuts the throttle member 30. The end of the throttle member 30, which is away from the oil return pipe 20, abuts the filter 40. In other words, the two ends of the throttle member 30 abut against the filter 40 and the oil return pipe 20, respectively, to limit their relative positions, thereby greatly reducing the difficulty and cost of manufacturing the oil separator 100.
[0047] When assembling the oil separator 100, the filter element 40 and the throttle element 30 can be placed in the oil return hole 102 in sequence, wherein the filter element 40 is limited by abutting against the positioning portion 11, and the throttle element 30 is limited by abutting against the filter element 40. Finally, the return oil pipe 20 is inserted into the oil return hole 102, thereby completing the installation of the oil separator 100.
[0048] In one embodiment, if Figure 1As shown, the oil separator 100 also includes an air inlet pipe 50 and an air outlet pipe 60, the air inlet pipe 50 is connected to the end of the cylinder 10 away from the oil outlet, and the air outlet pipe 60 is connected to the side wall of the cylinder 10, wherein the air inlet pipe 50 and the air outlet pipe 60 are both connected to the accommodating chamber 101.
[0049] In this way, the refrigerant is separated into gas and liquid after entering the accommodating chamber 101 through the air inlet pipe 50, the separated gas flows to the external pipeline through the air outlet pipe 60, and the separated lubricating oil is collected at the oil outlet. After being filtered by the filter element 40 and throttled by the throttling element 30, it flows back to the compressor through the return oil pipe 20 to meet the lubrication needs of the compressor.
[0050] The present application also provides an air-conditioning system, which includes a compressor and the oil separator 100 of any one of the above embodiments, wherein the oil separator 100 is connected to the compressor.
[0051] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned 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.
[0052] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, all of which fall within the scope of protection of the present application. Therefore, the scope of patent protection for the present application shall be determined by the appended claims.
Claims
1. An oil separator, characterized in that: The invention comprises a cylinder (10), an oil return pipe (20) and a throttling member (30); the cylinder (10) is provided with a receiving chamber (101) and an oil return hole (102) communicating with the receiving chamber (101); the oil return pipe (20) is connected to the cylinder (10), and the oil return pipe (20) is communicated with the receiving chamber (101) through the oil return hole (102); The throttling member (30) is arranged in the cylinder (10) or the oil return pipe (20), and a throttling hole (301) is opened on the throttling member (30), and the throttling hole (301) is communicated with the accommodating chamber (101), the oil return hole (102) and the oil return pipe (20).
2. The oil separator according to claim 1, characterized in that The inner diameter A of the throttle hole (301) and the inner diameter B of the oil return pipe (20) satisfy 0.005≤A / B≤0.
8.
3. The oil separator according to claim 2, characterized in that The length L of the throttle hole (301) satisfies 1mm≤L≤10mm.
4. The oil separator according to claim 3, characterized in that The throttling member (30) is further provided with a liquid inlet (302), and the liquid inlet (302) is respectively connected to the accommodating cavity (101) and the throttling hole (301); Wherein, along the axial direction of the throttling member (30) and in the direction from the liquid inlet (302) to the throttling hole (301), the flow area of the liquid inlet (302) tends to gradually decrease.
5. The oil separator according to claim 3 or 4, characterized in that: The throttling member (30) is further provided with a liquid outlet (303), and the liquid outlet (303) is respectively connected to the throttling hole (301) and the oil return pipe (20); Wherein, along the axial direction of the throttling member (30) and in the direction from the throttling hole (301) to the liquid outlet (303), the flow area of the liquid outlet (303) tends to gradually increase.
6. The oil separator according to claim 1, characterized in that The throttling member (30) is disposed in the oil return hole (102) and is connected to the cylinder (10).
7. The oil separator according to any one of claims 1 to 4 or 6, characterized in that: The oil separator further comprises a filter element (40), wherein the filter element (40) is installed in the cylinder (10) and is located on a side of the throttling element (30) away from the oil return pipe (20); The accommodating cavity (101) is connected to the oil return hole (102), the throttle hole (301) and the oil return pipe (20) through the filter element (40).
8. The oil separator according to claim 7, characterized in that A positioning portion (11) is formed on the inner wall of the oil return hole (102). The filter element (40) includes a filter screen (41) and a fixing portion (42). The fixing portion (42) is connected to the filter screen (41), and the fixing portion (42) abuts against the positioning portion (11) along the axial direction.
9. The oil separator according to claim 7 or 8, characterized in that: One end of the oil return pipe (20) is inserted into the oil return hole (102), and the end of the oil return pipe (20) inserted into the oil return hole (102) abuts against the throttling member (30); Wherein, one end of the throttling element (30) away from the oil return pipe (20) abuts against the filter element (40).
10. An air conditioning system, characterized in that: The utility model comprises a compressor and an oil separator according to any one of claims 1 to 9, wherein the oil separator is communicated with the compressor.