Oil-gas separation device and compressor

Abstract

The invention provides an oil-gas separation device and a compressor, the oil-gas separation device comprises a cover body, a crankshaft of the compressor is sleeved with the cover body, the cover body is close to the position between a motor of the compressor and an oil pool, the cover body is provided with an interlayer structure, and the interlayer structure is filled with a phase change medium. According to the motor, the technical problem that in the prior art, when a refrigerant penetrates through a reserved through-flow hole of the motor, a large amount of refrigerant oil is left in the through-flow hole, the through-flow hole is blocked, and flowing of the refrigerant is affected can be solved.

Description

Technical Field

[0001] The invention belongs to the technical field of compressors, and in particular relates to an oil-gas separation device and a compressor. Background Art

[0002] In the prior art, a cooling device is often not specially provided for the motor inside the compressor. The refrigerant inside the compressor cools the motor. However, when the refrigerant passes through the flow holes reserved in the motor, a large amount of refrigerant oil will be left in the flow holes, causing the flow holes to be blocked, affecting the flow of the refrigerant. At the same time, when the refrigerant oil in the oil pool is brought out by the refrigerant, it will also cause insufficient lubrication of the compressor parts, thereby causing problems such as a decrease in the refrigeration capacity of the compressor.

[0003] Since the refrigerant in the prior art will leave a large amount of refrigerant oil in the flow hole when passing through the reserved flow hole of the motor, causing the flow hole to be blocked, resulting in technical problems such as affecting the flow of the refrigerant, the present invention studies 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 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 the flow hole to be blocked, resulting in the refrigerant flow being affected.

[0005] In order to solve the above problems, the present invention provides an oil-gas separation device, including: a cover body, which is sleeved on the crankshaft of the compressor, and the cover body is close to the motor of the compressor and the oil pool, and the cover body has a sandwich structure, and the sandwich structure is filled with a phase change medium.

[0006] In some embodiments, a mounting piece is provided on the cover body, the mounting piece is located at the center of the cover body, a through hole is provided on the mounting piece, the through hole passes through the mounting piece and the cover body in sequence, and the crankshaft of the compressor is loosely matched with the mounting piece.

[0007] In some embodiments, the mounting member is in a truncated cone shape, and a diameter of one end of the mounting member connected to the cover body is larger than a diameter of the other end of the mounting member.

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

[0009] In some embodiments, the cover body includes a first section and a second section, the first section is cylindrical, the first section is connected to the mounting member through the second section, the cross-section of the compressor is taken as a horizontal plane, and an angle c is formed between the second section and the horizontal plane, and the value range of the angle c is 30°-45°.

[0010] In some embodiments, a plurality of through holes are disposed on the second segment, and the plurality of through holes 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 body also includes a third section, one end of the first section is connected to the second section, the other end of the first section is connected to the third section, the third section extends radially inward from the first section, and a confluence pool (10) is formed between the first section, the second section, and the third section.

[0012] In some embodiments, the cover body also includes a fourth section, one end of the third section is connected to the first section, the other end of the third section is connected to the fourth section, and the fourth section is arranged inclined toward the mounting member, with the cross-section of the compressor as a horizontal plane, and an angle d is formed between the fourth section and the horizontal plane, and the value range of the angle d is 30°-45°.

[0013] In some embodiments, the cover body includes an inner wall panel and an outer wall panel, and there is 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, and the minimum distance of the gap is e, and the value range of e is 0.5-1mm.

[0014] The present invention also provides a compressor, which comprises the above-mentioned oil-gas separation device.

[0015] In some embodiments, the compressor includes a shell, and when the cover includes a first section and a second section, the first section is sleeved in the shell, and the refrigerant flows through the cover and the motor of the compressor in sequence.

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

[0017] By arranging a cover on the crankshaft of the compressor, with the opening of the cover facing the oil pool, when the oil-gas mixture in the compressor moves upward, it will collide with the cover, thereby performing oil and gas separation; further, since the cover has a sandwich structure filled with a phase change medium, the refrigerant oil in the compressor will gather on the surface of the cover when encountering the cover with a lower temperature, and then flow into the oil pool along the cover, thereby preventing a large amount of refrigerant oil from being left in the flow holes when the oil-gas mixture passes through the flow holes reserved for the motor, causing the flow holes to be blocked, affecting the flow of the refrigerant, and further reducing the oil discharge rate of the compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. The drawings described below are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0019] Figure 1 The structure of the oil-gas separation device of the present invention is shown in FIG. Figure 1 ;

[0020] Figure 2 The structure of the oil-gas separation device of the present invention is shown in FIG. Figure 2 ;

[0021] Figure 3 The structure of the oil-gas separation device of the present invention is shown in FIG. Figure 3 ;

[0022] Figure 4 The structure of the oil-gas separation device of the present invention is shown in FIG. Figure 4 .

[0023] The accompanying drawings are marked as follows:

[0024] 1. Cover body; 2. Mounting parts; 3. Through hole; 4. First section; 5. Second section; 6. Third section; 7. Fourth section; 8. Inner wall panel; 9. Outer wall panel; 10. Confluence pool. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

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

[0028] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present 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 body 1, the cover body 1 is sleeved on the crankshaft of the compressor, and the cover body 1 is close to the motor of the compressor and the oil pool, the cover body 1 has a sandwich structure, and the sandwich structure is filled with a phase change medium. In this technical solution, by setting the cover body 1 on the crankshaft of the compressor, the opening of the cover body 1 faces the oil pool, when the oil-gas mixture in the compressor moves upward, it will collide with the cover body 1, so as to separate the oil and gas. Furthermore, because the cover body 1 has a sandwich structure, and the sandwich structure is filled with a phase change medium, the refrigerant oil in the compressor will encounter the cover body 1 with a lower temperature, and will be collected on the surface of the cover body 1, and then flow into the oil pool along the cover body 1, so as to avoid leaving a large amount of refrigerant oil in the flow hole when the oil-gas mixture passes through the reserved flow hole of the motor, causing the flow hole to be blocked, affecting the flow of the 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 body and the crankshaft of the compressor are clearance-matched.

[0031] In some embodiments, the cover body 1 is provided with a mounting member 2, the mounting member 2 is located at the center of the cover body 1, the mounting member 2 is provided with a through hole, the through hole sequentially penetrates the mounting member 2 and the cover body 1, and the crankshaft of the compressor is loosely matched with the mounting member 2. In this technical solution, through the mounting member 2, the crankshaft of the compressor is loosely matched with the mounting member 2, so that a circulation channel is formed between the crankshaft and the mounting member 2, and the refrigerant flows from bottom to top, passing through the rotor cooling device through the circulation channel. During the flow of the refrigerant, part of the cooling oil will be entrained and flow with the refrigerant, and the refrigerant will collide with the cover body 1 and the upper mounting member 2, and the refrigerant oil will flow into the confluence pool along the cover body 1 due to its own weight and viscous fluidity.

[0032] In some embodiments, the mounting member 2 is in a truncated cone shape, and the diameter of one end of the mounting member 2 connected to the cover body 1 is larger than the diameter of the other end of the mounting member 2. In this technical solution, the mounting member 2 is in a truncated cone shape, and the diameter of one end of the mounting member 2 connected to the cover body 1 is larger than the diameter of the other end of the mounting member 2. The separated lubricating oil flows quickly into the oil pool under the action of the inclined surface of the mounting member 2.

[0033] In some embodiments, the height direction is the axial direction of the compressor, 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, which satisfies that the range of a / b is 1 / 4-1 / 3. In this technical solution, by taking the axial direction of the compressor 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, which satisfies that the range of a / b is 1 / 4-1 / 3, the mounting member 2 guides the separated refrigerant to flow toward the rotor, thereby achieving the purpose of cooling the rotor.

[0034] In some embodiments, the cover body 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 member 2 through the second section 5, the cross section of the compressor is taken as a horizontal plane, and an angle c is formed between the second section 5 and the horizontal plane, and the value range of the angle c is 30°-45°. In this technical solution, by taking the cross section of the compressor as a horizontal plane, an angle c is formed between the second section 5 and the horizontal plane, and the value range of the angle c is 30°-45°. In other words, the second section 5 is an inclined surface, which makes it easier for the lubricating oil to flow from the cover body 1 into the oil pool.

[0035] In some embodiments, a plurality of through holes 3 are provided on the second section 5, and the plurality of through holes 3 are arranged at intervals along the circumference of the second section 5, and the through holes 3 are arranged close to the first section 4 relative to the mounting member 2. In this technical solution, the through holes 3 not only play a role in circulating the refrigerant, but also allow the lubricating oil separated from the cover body 1 to flow into the oil pool through the through holes 3.

[0036] In some embodiments, the cover body 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.

[0037] In some embodiments, the cover body 1 further includes a fourth section 7, one end of the third section 6 is connected to the first section 4, the other end of the third section 6 is connected to the fourth section 7, and the fourth section 7 is arranged obliquely toward the mounting member 2, with the cross section of the compressor as a horizontal plane, and an angle d is formed between the fourth section 7 and the horizontal plane, and the value range of the angle d is 30°-45°. In this technical solution, there is a minimum angle d between the fourth section 7 and the horizontal plane, and through the setting of the confluence pool 10, the confluence pool 10 is used to temporarily store the refrigerant oil intercepted by the second end 5, and at the same time to condense the phase change medium inside the interlayer so that it can circulate normally.

[0038] The oil-gas separation device of the present invention has an outer edge of the cover 1 stuck inside the housing of the compression molding machine, and the overall position is below the motor and above the oil pool. The rotor crankshaft passes through the mounting member 2. The cover 1 is provided with a plurality of through holes 3, and the through holes 3 are located above the confluence pool 10. The cover 1 is provided with an interlayer filled with a phase change medium, and the through holes 3 are connected to the confluence pool 10 through the second section 5 inclined surface. The mounting member 2 is arranged at the top of the cover 1, and is shaped as an inwardly gathered cylinder. The height a of the mounting member 2 accounts for 1 / 4-1 / 3 of the overall height b of the oil-gas separation device. The mounting member 2 is connected to the confluence pool 10 through the second section 5 inclined surface with an angle c of about 30°-45°. The purpose is to separate the refrigeration oil and the refrigerant through the second section 5 inclined surface with an angle c. When the refrigeration oil encounters the inclined surface with a lower temperature, it will be trapped on the inclined surface and flow into the confluence pool along the inclined surface. The through holes 3 are arranged at the outer edge of the slope of the second section 5, above the confluence pool 10, and are evenly distributed along the axial direction. The through holes 3 are circular in shape and are used to guide the refrigerant oil returned from the mounting member 2 to flow into the confluence pool.

[0039] In some embodiments, the cover body 1 includes an inner wall plate 8 and an outer wall plate 9, and there is a gap between the inner wall plate 8 and the outer wall plate 9, and the inner wall plate 8, the outer wall plate 9 and the gap form the sandwich structure, and the minimum distance of the gap is e, and the value range of e is 0.5-1mm. In this technical solution, the sandwich structure is formed by the inner wall plate 8, the outer wall plate 9 and the gap, and the minimum distance of the gap is e, and the value range of e is 0.5-1mm, which ensures the heat exchange effect of the phase change medium on the oil-gas mixture through the inner wall plate 8 and the outer wall plate 9, thereby improving the oil-gas separation efficiency.

[0040] In the oil-gas separation device of the present invention, the driving force is the gravity change of the phase change medium itself. In the initial state, the phase change medium is liquid. As the cycle proceeds, the liquid medium changes to gas. The gaseous medium comes into contact with the refrigerated oil trapped in the confluence pool and begins to convert into a liquid medium, which repeats over and over again.

[0041] In the oil-gas separation device of the present invention, the confluence pool 10 is arranged below the super body 1, and the outer edge of the confluence pool 10 has a fourth section 7 slope that is inclined outward, and the fourth section 7 has an inclination angle d of 30°-45°, which is used to temporarily store the refrigerant oil intercepted by the fourth section 7 slope, and at the same time to condense the phase change medium inside the interlayer so that it can circulate normally. The interlayer is filled with phase change medium, the entire interlayer is closed and interconnected, the volume of the phase change medium in the interlayer accounts for at least half of the total volume, the interlayer channel width e is 0.5-1mm, the slope interlayer is in contact with the refrigerant and the refrigerant oil, the phase change medium will change from liquid to gas, thereby cooling the refrigerant and the refrigerant oil, the refrigerant oil is intercepted by the inclined surface, the confluence pool interlayer is in contact with the refrigerant oil, the phase change medium changes from gas to liquid, and completes a whole working cycle, and the edge of the confluence pool is inclined outward to facilitate the refrigerant oil to return to the oil pool below.

[0042] The present invention also provides a compressor, comprising the above-mentioned oil-gas separation device.

[0043] In some embodiments, the compressor includes a shell, and when the cover 1 includes a first section 4 and a second section 5, the first section 4 is sleeved in the shell, and the refrigerant flows through the cover 1 and the motor of the compressor in sequence. In this technical solution, preferably, the cover 1 is interference-fitted or snap-fitted with the shell through the first section 4, so that the oil-gas mixture passes through the cover 1, improving the oil-gas separation effect of the cover 1, and avoiding that when the oil-gas mixture passes through the flow hole reserved for the motor, a large amount of refrigerant oil is left in the flow hole, causing the flow hole to be blocked and affecting the flow of the refrigerant.

[0044] The compressor of the present invention improves the problem that the stator flow hole will be blocked by refrigeration oil by arranging a rotor oil-gas separation device inside the compressor, improves the heat dissipation capacity of the motor, avoids the demagnetization of permanent magnets and other problems, reduces the risk of insufficient lubrication of compressor parts, and improves the reliability of compressor operation. At the same time, the secondary utilization of refrigeration oil is improved, and the refrigeration oil is intercepted by the confluence pool of the rotor cooling device to cool the phase change medium inside the rotor cooling device, further improving the working efficiency of the rotor cooling device, including:

[0045] It is easy for those skilled in the art to understand that, without conflict, the advantageous technical features of the above-mentioned methods can be freely combined and superimposed.

[0046] The above description is only 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 principle of the present invention shall be included in the protection scope of the present invention. The above description is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present invention. These improvements and variations should also be regarded as the protection scope of the present invention.

Claims

1. An oil-gas separation device, characterized in that: include: A cover body (1) is sleeved on a crankshaft of a compressor, and the cover body (1) is close to a motor and an oil pool of the compressor. The cover body (1) has a sandwich structure, and the sandwich structure is filled with a phase change medium.

2. The oil-gas separation device according to claim 1, characterized in that: The cover body (1) is provided with a mounting member (2), the mounting member (2) is located at the center of the cover body (1), the mounting member (2) is provided with a through hole, the through hole passes through the mounting member (2) and the cover body (1) in sequence, and the crankshaft of the compressor is loosely matched with the mounting member (2).

3. The oil-gas separation device according to claim 2, characterized in that: The mounting piece (2) is in the shape of a truncated cone, and the diameter of one end of the mounting piece (2) connected to the cover body (1) is larger than the diameter of the other end of the mounting piece (2).

4. The oil-gas separation device according to claim 3, characterized in that: Taking the axial direction of the compressor 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 body (1) is b, which satisfies that the range of a / b is 1 / 4-1 / 3.

5. The oil-gas separation device according to claim 3, characterized in that: The cover body (1) comprises a first section (4) and a second section (5), the first section (4) is cylindrical, the first section (4) is connected to the mounting member (2) via the second section (5), the cross section of the compressor is taken as a horizontal plane, an angle c is formed between the second section (5) and the horizontal plane, and the value range of the angle c is 30°-45°.

6. The oil-gas separation device according to claim 5, characterized in that: The second section (5) is provided with a plurality of through holes (3), and the plurality of through holes (3) are arranged at intervals along the circumference of the second section (5), and the through holes (3) are arranged close to the first section (4) relative to the mounting member (2).

7. The oil-gas separation device according to claim 5, characterized in that: The cover body (1) further comprises 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 inwardly 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).

8. The oil-gas separation device according to claim 7, characterized in that: The cover body (1) further comprises a fourth section (7), one end of the third section (6) is connected to the first section (4), the other end of the third section (6) is connected to the fourth section (7), and the fourth section (7) is arranged to be inclined toward the mounting member (2), with the cross section of the compressor as a horizontal plane, and an angle d is formed between the fourth section (7) and the horizontal plane, and the value range of the angle d is 30°-45°.

9. The oil-gas separation device according to claim 1, characterized in that: The cover body (1) comprises an inner wall plate (8) and an outer wall plate (9), wherein a gap is provided between the inner wall plate (8) and the outer wall plate (9), and the inner wall plate (8), the outer wall plate (9) and the gap form a sandwich structure, wherein the minimum distance of the gap is e, and the value range of e is 0.5-1 mm.

10. A compressor, characterized in that: The invention comprises the oil-gas separation device according to any one of claims 1 to 9.

11. The compressor according to claim 10, characterized in that: The compressor comprises a shell. When the cover (1) comprises a first section (4) and a second section (5), the first section (4) is sleeved in the shell, and the refrigerant flows through the cover (1) and the motor of the compressor in sequence.

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