An oil and gas separation device, compressor

Abstract

The application provides an oil-gas separation device and a compressor, wherein the oil-gas separation device comprises a cover body, the cover body is sleeved on a crankshaft of the compressor, the cover body is close to a motor and an oil pool of the compressor, the cover body has a sandwich structure, and a phase change medium is filled in the sandwich structure. According to the application, the technical problem that a large amount of frozen oil is left in a through-flow hole reserved for the refrigerant of the motor, the through-flow hole is blocked, and the refrigerant flow is affected can be solved.

Description

Technical Field

[0001] This invention belongs to the field of compressor technology, specifically relating to an oil-gas separation device and a compressor. Background Technology

[0002] In existing technologies, the motor inside the compressor is often not equipped with a dedicated cooling device. The motor is cooled by the refrigerant inside the compressor. However, when the refrigerant passes through the flow hole reserved in the motor, a large amount of refrigerant oil will be left in the flow hole, causing blockage of the flow hole and affecting the flow of refrigerant. At the same time, the refrigerant oil in the oil sump is carried out by the refrigerant, which will also cause insufficient lubrication of the compressor parts, resulting in problems such as a decrease in the cooling capacity of the compressor.

[0003] Because existing technologies suffer from technical problems such as refrigerant leaving a large amount of refrigeration oil in the flow holes when the refrigerant passes through the motor, causing blockage of the flow holes and affecting the flow of refrigerant, this invention researches and designs an oil-gas separation device and a compressor. Summary of the Invention

[0004] Therefore, the present invention provides an oil-gas separation device and a compressor, which can solve the technical problem in the prior art that when refrigerant passes through the flow hole reserved in the motor, a large amount of refrigeration oil will be left in the flow hole, causing blockage of the flow hole and affecting the flow of refrigerant.

[0005] To solve the above problems, the present invention provides an oil-gas separation device, comprising: a cover, the cover being sleeved on the crankshaft of a compressor, and the cover being located near the space between the compressor motor and the oil sump, the cover having a sandwich structure, the sandwich structure being filled with a phase change medium.

[0006] In some embodiments, the cover is provided with a mounting member located at the center of the cover, and the mounting member is provided with a through hole that passes through the mounting member and the cover in sequence, and the crankshaft of the compressor is clearance-fitted with the mounting member.

[0007] In some embodiments, the mounting member is frustum-shaped, and the diameter of the end of the mounting member connected to the cover is larger than the diameter of the other end of the mounting member.

[0008] In some embodiments, with the axial direction of the compressor as the height direction, the height of the mounting component is a, and the sum of the heights of the mounting component and the cover is b, which satisfies that the range of a / b is 1 / 4 to 1 / 3.

[0009] In some embodiments, the cover includes a first segment and a second segment. The first segment is cylindrical and is connected to the mounting component via the second segment. With the cross-section of the compressor as the horizontal plane, the second segment has an angle c with the horizontal plane, and the angle c ranges from 30° to 45°.

[0010] In some embodiments, the second segment is provided with a plurality of through holes, which are arranged at intervals along the circumference of the second segment, and the through holes are arranged close to the first segment relative to the mounting member.

[0011] In some embodiments, the cover further includes a third segment, one end of the first segment is connected to the second segment, the other end of the first segment is connected to the third segment, the third segment extends radially inward along the first segment, and a confluence pool (10) is formed between the first segment, the second segment and the third segment.

[0012] In some embodiments, the cover further includes a fourth segment, one end of the third segment is connected to the first segment, the other end of the third segment is connected to the fourth segment, and the fourth segment is arranged obliquely toward the mounting component with the cross-section of the compressor as the horizontal plane, and the fourth segment has an angle d with the horizontal plane, the angle d being in the range of 30°-45°.

[0013] In some embodiments, the cover includes an inner wall panel and an outer wall panel, with a gap between the inner wall panel and the outer wall panel. The inner wall panel, the outer wall panel, and the gap form the sandwich structure. The minimum distance of the gap is e, and the value of e ranges from 0.5 to 1 mm.

[0014] The present invention also provides a compressor that includes the aforementioned oil-gas separation device.

[0015] In some embodiments, the compressor includes a housing, and when the housing includes a first section and a second section, the first section is fitted inside the housing, and refrigerant flows sequentially through the housing and the compressor motor.

[0016] The oil-gas separation device and compressor provided by this invention have the following beneficial effects:

[0017] By installing a cover on the crankshaft of the compressor with the opening of the cover facing the oil sump, when the oil-gas mixture inside the compressor moves upward, it will collide with the cover, thereby separating the oil and gas. Furthermore, since the cover has a sandwich structure filled with a phase change medium, the refrigerant oil inside the compressor will collect on the surface of the cover when it encounters the cooler cover, and then flow into the oil sump along the cover. This avoids leaving a large amount of refrigerant oil in the flow hole when the oil-gas mixture passes through the flow hole reserved in the motor, which would cause blockage of the flow hole, affect the flow of refrigerant, and further reduce the oil discharge rate of the compressor. Attached Figure Description

[0018] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. The drawings described below are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of the oil-gas separation device of the present invention. Figure 1 ;

[0020] Figure 2 This is a schematic diagram of the structure of the oil-gas separation device of the present invention. Figure 2 ;

[0021] Figure 3 This is a schematic diagram of the structure of the oil-gas separation device of the present invention. Figure 3 ;

[0022] Figure 4 This is a schematic diagram of the structure of the oil-gas separation device of the present invention. Figure 4 .

[0023] The attached figures are labeled as follows:

[0024] 1. Cover; 2. Mounting components; 3. Through holes; 4. First section; 5. Second section; 6. Third section; 7. Fourth section; 8. Inner wall panel; 9. Outer wall panel; 10. Combustion pool. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0027] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0028] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0029] See also Figure 1-4 As shown, according to an embodiment of the present invention, an oil-gas separation device is provided, comprising: a cover 1, the cover 1 being sleeved on the crankshaft of a compressor, and the cover 1 being located near the space between the compressor motor and the oil sump. The cover 1 has a sandwich structure, and the sandwich structure is filled with a phase change medium. In this technical solution, by setting the cover 1 on the crankshaft of the compressor with the opening of the cover 1 facing the oil sump, when the oil-gas mixture in the compressor moves upward, it will collide with the cover 1, thereby achieving oil-gas separation. Furthermore, since the cover 1 has a sandwich structure filled with a phase change medium, the refrigerant oil in the compressor will collect on the surface of the cover 1 when it encounters the lower temperature of the cover 1, thereby flowing into the oil sump along the cover 1. This avoids the oil-gas mixture leaving a large amount of refrigerant oil in the flow hole when passing through the pre-reserved flow hole of the motor, causing blockage of the flow hole, affecting the flow of refrigerant, and further reducing the oil discharge rate of the compressor.

[0030] In the oil-gas separation device of the present invention, the phase change medium is water or ethanol, and the cover and the crankshaft of the compressor are fitted with clearance.

[0031] In some embodiments, a mounting member 2 is provided on the cover 1, the mounting member 2 is located at the center of the cover 1, and the mounting member 2 is provided with a through hole that passes through the mounting member 2 and the cover 1 in sequence. The crankshaft of the compressor is clearance-fitted with the mounting member 2. In this technical solution, the clearance fit between the crankshaft of the compressor and the mounting member 2 through the mounting member 2 creates a flow channel between the crankshaft and the mounting member 2. The refrigerant flows from bottom to top, passing through the rotor cooling device through the flow channel. During the refrigerant flow, some cooling oil is carried along with the refrigerant. The refrigerant collides with the cover 1 and the upper mounting member 2, while the refrigerant oil, due to its own weight and viscous fluidity, flows down the cover 1 into the manifold.

[0032] In some embodiments, the mounting member 2 is frustum-shaped, and the diameter of the end of the mounting member 2 connected to the cover 1 is larger than the diameter of the other end of the mounting member 2. In this technical solution, by making the mounting member 2 frustum-shaped and the diameter of the end of the mounting member 2 connected to the cover 1 larger than the diameter of the other end of the mounting member 2, the separated lubricating oil flows rapidly into the oil sump under the action of the inclined surface of the mounting member 2.

[0033] In some embodiments, with the compressor's axial direction as the height direction, the height of the mounting member 2 is 'a', and the sum of the heights of the mounting member 2 and the cover 1 is 'b', satisfying that a / b is in the range of 1 / 4 to 1 / 3. In this technical solution, by using the compressor's axial direction as the height direction, the height of the mounting member 2 is 'a', and the sum of the heights of the mounting member 2 and the cover 1 is 'b', satisfying that a / b is in the range of 1 / 4 to 1 / 3, allowing the mounting member 2 to guide the separated refrigerant towards the rotor, thereby achieving the purpose of cooling the rotor.

[0034] In some embodiments, the cover 1 includes a first segment 4 and a second segment 5. The first segment 4 is cylindrical and is connected to the mounting component 2 via the second segment 5. With the cross-section of the compressor as the horizontal plane, the second segment 5 forms an angle c with the horizontal plane, the angle c ranging from 30° to 45°. In this technical solution, by using the cross-section of the compressor as the horizontal plane and having an angle c between the second segment 5 and the horizontal plane, the angle c ranges from 30° to 45°. That is, the second segment 5 is an inclined surface, which facilitates the flow of lubricating oil from the cover 1 into the oil sump.

[0035] In some embodiments, the second segment 5 is provided with a plurality of through holes 3, which are arranged at intervals along the circumference of the second segment 5, and the through holes 3 are arranged close to the first segment 4 relative to the mounting member 2. In this technical solution, the through holes 3 not only serve to facilitate the flow of refrigerant, but also allow the lubricating oil separated on the cover 1 to flow into the oil sump through the through holes 3.

[0036] In some embodiments, the cover 1 further includes a third segment 6, one end of the first segment 4 is connected to the second segment 5, the other end of the first segment 4 is connected to the third segment 6, the third segment 6 extends radially inward along the first segment 4, and a confluence pool 10 is formed between the first segment 4, the second segment 5 and the third segment 6.

[0037] In some embodiments, the cover 1 further includes a fourth section 7, one end of the third section 6 is connected to the first section 4, and the other end of the third section 6 is connected to the fourth section 7. The fourth section 7 is arranged inclined towards the mounting member 2, with the cross-section of the compressor as the horizontal plane. The fourth section 7 and the horizontal plane have an angle d, the value of which ranges from 30° to 45°. In this technical solution, the fourth section 7 has a minimum angle d with the horizontal plane. Through the arrangement of the manifold 10, the manifold 10 is used to temporarily store the refrigerant oil intercepted by the second section 5, and simultaneously to condense the phase change medium inside the jacket, enabling it to circulate normally.

[0038] This invention relates to an oil-gas separation device. The outer edge of the cover 1 is clamped inside the housing of a compression molding machine, positioned below the motor and above the oil tank. The rotor crankshaft passes through the mounting component 2. The cover 1 has several through holes 3, located above the manifold 10. The cover 1 has an internal interlayer filled with a phase change medium. The through holes 3 are connected to the manifold 10 via a second inclined surface 5. The mounting component 2 is located at the top of the cover 1 and is shaped as an inwardly converging cylinder. The height a of the mounting component 2 is 1 / 4 to 1 / 3 of the overall height b of the oil-gas separation device. The mounting component 2 is connected to the manifold 10 via a second inclined surface 5 at an angle c of approximately 30°-45°. Its purpose is to separate the refrigeration oil and refrigerant via the second inclined surface 5 at angle c. When the refrigeration oil encounters the lower-temperature inclined surface, it is trapped on the surface and flows down the inclined surface into the manifold. The through hole 3 is located on the outer edge of the inclined surface of the second section 5, above the manifold 10, and is evenly distributed along the axial direction. It is circular in shape and is used to guide the refrigeration oil returning from the mounting part 2 to flow into the manifold.

[0039] In some embodiments, the enclosure 1 includes an inner wall panel 8 and an outer wall panel 9, with a gap between the inner wall panel 8 and the outer wall panel 9. The inner wall panel 8, the outer wall panel 9, and the gap form the sandwich structure, and the minimum distance of the gap is e, where e ranges from 0.5 to 1 mm. In this technical solution, the sandwich structure formed by the inner wall panel 8, the outer wall panel 9, and the gap, with the minimum distance of the gap being e and the value of e ranging from 0.5 to 1 mm, ensures the heat exchange effect of the phase change medium on the oil-gas mixture through the inner wall panel 8 and the outer wall panel 9, thereby improving the oil-gas separation efficiency.

[0040] In the oil-gas separation device of the present invention, the driving force is the gravitational change of the phase change medium itself. In the initial state, the phase change medium is liquid. As the circulation proceeds, the liquid medium becomes gaseous. The gaseous medium comes into contact with the refrigeration oil phase trapped at the manifold and begins to transform into liquid medium, and the cycle repeats.

[0041] In the oil-gas separation device of the present invention, the manifold 10 is located below the cover 1. The outer edge of the manifold 10 has an outwardly inclined fourth section 7 slope with an inclination angle d of 30°-45°. Its purpose is to temporarily store the refrigeration oil trapped by the fourth section 7 slope, and at the same time to condense the phase change medium inside the jacket, so that it can circulate normally. The jacket is filled with phase change medium. The entire jacket is closed and interconnected. The volume of the phase change medium inside the jacket is at least half of the total volume. The width e of the jacket channel is 0.5-1mm. The inclined jacket comes into contact with the refrigerant and refrigeration oil. The phase change medium will change from liquid to gas, thereby cooling the refrigerant and refrigeration oil. The refrigeration oil is trapped by the slope. The manifold jacket comes into contact with the refrigeration oil. The phase change medium changes from gas to liquid, completing a whole working cycle. The edge of the manifold slopes outward to facilitate the return of the refrigeration oil to the oil pool below.

[0042] The present invention also provides a compressor including the above-described oil-gas separation device.

[0043] In some embodiments, the compressor includes a housing. When the cover 1 includes a first section 4 and a second section 5, the first section 4 is fitted inside the housing, and the refrigerant flows sequentially through the cover 1 and the compressor motor. Preferably, in this technical solution, the cover 1 is interference-fitted or interlocked with the housing via the first section 4, allowing the oil-gas mixture to pass entirely through the cover 1. This improves the oil-gas separation effect of the cover 1 and prevents a large amount of refrigerant oil from remaining in the flow holes when the oil-gas mixture passes through the pre-reserved flow holes in the motor, causing blockage and affecting refrigerant flow.

[0044] The compressor of this invention, by incorporating a rotor oil-gas separator inside the compressor, improves the problem of stator flow holes being blocked by refrigerant oil, enhances the motor's heat dissipation capacity, avoids problems such as permanent magnet demagnetization, and reduces the risk of insufficient lubrication of compressor parts; thus improving the reliability of compressor operation. Simultaneously, it enhances the secondary utilization of refrigerant oil by retaining it in the manifold of the rotor cooling device for cooling the phase change medium inside the rotor cooling device, further improving the working efficiency of the rotor cooling device, including:

[0045] It will be readily understood by those skilled in the art that, without conflict, the advantageous technical features of the above-mentioned methods can be freely combined and superimposed.

[0046] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention. The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the protection scope of the present invention.

Claims

1. A compressor, characterized in that: include: Cover (1), the cover (1) is sleeved on the crankshaft of the compressor, and the cover (1) is close to the space between the motor and the oil sump of the compressor. The cover (1) has a sandwich structure, the sandwich structure is a closed and interconnected integrated structure, and the sandwich structure is filled with a phase change medium. The oil-gas mixture flows through the cover (1) for oil-gas separation. The separated oil will collect on the surface of the cover (1) and flow along the cover (1) to the oil sump of the compressor. The separated gas flows to the flow hole of the motor. The compressor includes a housing. When the cover (1) includes a first section (4) and a second section (5), the first section (4) is fitted inside the housing. The refrigerant flows sequentially through the cover (1) and the motor of the compressor. The opening of the cover (1) faces the oil sump of the compressor. The cover (1) is provided with a mounting part (2). The mounting part (2) is located at the center of the cover (1). The mounting part (2) is provided with a through hole. The through hole passes through the mounting part (2) and the cover (1) sequentially. The crankshaft of the compressor is clearance-fitted with the mounting part (2). The mounting component (2) is frustum-shaped, and the diameter of the end of the mounting component (2) connected to the cover (1) is larger than the diameter of the other end of the mounting component (2); The cover (1) includes a first section (4) and a second section (5). The first section (4) is cylindrical. The first section (4) is connected to the mounting component (2) through the second section (5). With the cross-section of the compressor as the horizontal plane, the second section (5) has an angle c with the horizontal plane. The value of the angle c is in the range of 30°-45°. The cover (1) also includes a third section (6), one end of the first section (4) is connected to the second section (5), the other end of the first section (4) is connected to the third section (6), the third section (6) extends radially inward along the first section (4), and a confluence pool (10) is formed between the first section (4), the second section (5) and the third section (6). The cover (1) further includes a fourth segment (7), one end of the third segment (6) is connected to the first segment (4), the other end of the third segment (6) is connected to the fourth segment (7), and the fourth segment (7) is inclined toward the mounting component (2), with the cross-section of the compressor as the horizontal plane, and the fourth segment (7) and the horizontal plane have an angle d, the value of the angle d is in the range of 30°-45°.

2. The compressor according to claim 1, characterized in that: With the axial direction of the compressor as the height direction, the height of the mounting part (2) is a, and the sum of the heights of the mounting part (2) and the cover (1) is b, which satisfies that the range of a / b is 1 / 4-1 / 3.

3. The compressor according to claim 1, characterized in that: The second segment (5) is provided with a plurality of through holes (3). The plurality of through holes (3) are arranged at intervals along the circumference of the second segment (5), and the through holes (3) are arranged close to the first segment (4) relative to the mounting member (2).

4. The compressor according to claim 1, characterized in that: The cover (1) includes an inner wall panel (8) and an outer wall panel (9). There is a gap between the inner wall panel (8) and the outer wall panel (9). The inner wall panel (8), the outer wall panel (9) and the gap form the sandwich structure. The minimum distance of the gap is e, and the value of e ranges from 0.5 to 1 mm.

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