阅读说明：本技术 一种压缩机用的回油系统 (Oil return system that compressor was used ) 是由 魏亚芳 高永红 蓝榕江 于 2019-10-24 设计创作，主要内容包括：本发明涉及压缩机技术领域,具体涉及一种压缩机用的回油系统、压缩机及空调,其中压缩机用的回油系统包括压缩机壳体,与压缩机壳体连通的储液罐,设置在压缩机壳体内部的电机,设置于压缩机壳体上端部的上盖,设置于压缩机壳体底部的下盖,上盖与电机形成上腔,下盖与压缩机壳体之间形成油池,上腔和油池回油管连通,上腔内设置有用于将油导向回油管的油气分离收集组件。本发明的回油管将上腔和油池连通,同时在上腔内设置了油气分离收集组件,油气分离收集组件提高油气分离的效果,油可从回油管回流到油池中,避免了压缩机在运转的过程中,由于少油或者缺油导致的压缩机零部件磨损问题,延长了压缩机的使用寿命,提高了压缩机的可靠性。(The invention relates to the technical field of compressors, in particular to an oil return system for a compressor, the compressor and an air conditioner, wherein the oil return system for the compressor comprises a compressor shell, a liquid storage tank communicated with the compressor shell, a motor arranged in the compressor shell, an upper cover arranged at the upper end part of the compressor shell and a lower cover arranged at the bottom of the compressor shell, the upper cover and the motor form an upper cavity, an oil pool is formed between the lower cover and the compressor shell, the upper cavity is communicated with an oil return pipe of the oil pool, and an oil-gas separation and collection assembly used for guiding oil to the oil return pipe is arranged in the upper cavity. The oil return pipe of the invention communicates the upper cavity with the oil pool, and the oil-gas separation and collection assembly is arranged in the upper cavity, so that the oil-gas separation and collection assembly improves the oil-gas separation effect, oil can flow back into the oil pool from the oil return pipe, the problem of abrasion of parts of the compressor caused by less oil or lack of oil in the running process of the compressor is avoided, the service life of the compressor is prolonged, and the reliability of the compressor is improved.)

1. The utility model provides an oil return system that compressor was used, includes compressor housing, sets up the motor in compressor housing inside, sets up in the upper cover of compressor housing upper end, sets up in the lower cover of compressor housing bottom, the space between upper cover and the motor forms the epicoele of compressor, form the oil bath that is used for holding oil between lower cover and the compressor housing, a serial communication port, oil return system that compressor was used still is including setting up the intercommunication that is used for at compressor housing outer wall the oil return pipe of epicoele and oil bath to and set up the oil-gas separation who is used for in the last intracavity and leads oil to oil return pipe and collect the subassembly, oil-gas separation collects the subassembly and sets up for the horizontal plane slope, and oil-gas separation collects the inlet that the subassembly is corresponding with oil return pipe's least.

2. The oil return system for the compressor according to claim 1, wherein the oil-gas separation and collection assembly comprises an oil collection frame connected to the inner wall of the compressor housing and through which oil flows, an oil collection portion disposed inside the oil collection frame, and a plurality of ribs for connecting the oil collection portion and the oil collection frame, one end of each rib being connected to the oil collection frame, and the other end of each rib being connected to the oil collection portion; and the oil collecting frame is also provided with a mouth part for guiding oil to the oil return pipe at the position corresponding to the oil return pipe.

3. The oil return system for a compressor according to claim 2, wherein an oil passage through which oil is circulated is provided on an inward side of the oil collecting frame facing the upper cover.

4. The oil return system for a compressor of claim 2 wherein the oil scoop frame is in interference engagement with an inner wall of the compressor housing.

5. The oil return system for a compressor according to claim 2, wherein the rib is provided with a groove through which oil flows.

6. The oil return system for the compressor according to claim 1, wherein oil holes for communicating with an oil return pipe are formed at positions of the compressor housing corresponding to the upper chamber and at positions of the compressor housing corresponding to the oil sump; the oil return pipe comprises a connecting assembly and a middle pipe section, and two ends of the middle pipe section are connected with an oil hole of the compressor shell through the connecting assembly.

7. The oil return system for the compressor according to claim 6, wherein the connecting assembly includes a first connecting member connected to the middle pipe section, and a second connecting member sleeved outside the first connecting member and used for connecting the oil hole, and the first connecting member and the second connecting member and the oil hole are fixed by welding.

8. The oil return system for compressor according to claim 6, wherein the distance between the oil hole of the compressor housing corresponding to the upper cavity position and the motor in the vertical direction is less than 10mm, and the oil hole of the compressor housing corresponding to the oil pool position is located at one third of the height of the oil pool.

9. A compressor comprising the oil return system for a compressor according to any one of claims 1 to 8, the compressor further comprising a liquid storage tank communicating with a compressor housing, an upper flange disposed below the motor, the motor being connected to a rotating shaft, the rotating shaft extending through the upper flange into the liquid storage tank, the rotating shaft below the upper flange being connected to a cylinder; the lower end of the cylinder is also connected with a lower flange.

10. An air conditioner characterized by comprising the compressor of claim 9.

Technical Field

The invention relates to the technical field of compressors, in particular to an oil return system for a compressor.

Background

The compressor is a driven fluid machine that raises low-pressure gas to high-pressure gas, and is the heart of a refrigeration system. The refrigerating cycle is powered by sucking low-temperature and low-pressure refrigerant gas from the air suction pipe, driving the piston to compress the refrigerant gas through the operation of the motor, and discharging high-temperature and high-pressure refrigerant gas to the exhaust pipe. With the continuous progress of the compressor and air conditioning system technology, higher requirements are made on the quality and the technology of the compressor. In the compressor, lubricating oil for lubrication generally needs to be injected to reduce friction between parts in the compressor, so that the movement between the parts is smoother, and the wear of the parts is reduced. In the process of operation of the existing compressor, the condition of oil shortage or oil shortage caused by excessive oil discharge of the compressor is usually encountered, so that the compressor mechanism is easy to wear in a high-temperature and high-pressure environment, the service lives of parts and mechanisms of the compressor are reduced, the reliability service life of the compressor is further reduced, and the frequent faults of the compressor can also be caused by the wear of the internal mechanisms and components of the compressor.

Disclosure of Invention

In order to solve the problems, the invention provides an oil return system for a compressor, which can avoid the problem of abrasion of parts of the compressor caused by less oil or oil shortage, and also provides a compressor comprising the oil return system for the compressor and an air conditioner comprising the compressor.

The invention is realized by adopting the following scheme:

the utility model provides an oil return system that compressor was used, includes compressor housing, sets up the motor in compressor housing inside, sets up in the upper cover of compressor housing upper end, sets up in the lower cover of compressor housing bottom, the space between upper cover and the motor forms the epicoele of compressor, form the oil bath that is used for holding oil between lower cover and the compressor housing, a serial communication port, oil return system that compressor was used still is including setting up the intercommunication that is used for at compressor housing outer wall the oil return pipe of epicoele and oil bath to and set up the oil-gas separation who is used for in the last intracavity and leads oil to oil return pipe and collect the subassembly, oil-gas separation collects the subassembly and sets up for the horizontal plane slope, and oil-gas separation collects the inlet that the subassembly is corresponding with oil return pipe's least. .

Furthermore, the oil-gas separation and collection assembly comprises an oil collection frame which is connected with the inner wall of the shell of the compressor and is used for supplying oil to flow, an oil collection part which is arranged in the oil collection frame, and a plurality of ribs which are used for connecting the oil collection part and the oil collection frame, wherein one end of each rib is connected with the oil collection frame, and the other end of each rib is connected with the oil collection part; and the oil collecting frame is also provided with a mouth part for guiding oil to the oil return pipe at the position corresponding to the oil return pipe.

Furthermore, an oil duct for supplying oil to circulate is arranged on one inward side of the oil collecting frame facing the upper cover.

Furthermore, the oil collecting frame is in interference connection with the inner wall of the shell of the compressor.

Further, the rib is provided with a groove for oil supply circulation.

Furthermore, oil holes for communicating an oil return pipe are formed in the positions of the compressor shell corresponding to the upper cavity and the positions of the compressor shell corresponding to the oil pool; the oil return pipe comprises a connecting assembly and a middle pipe section, and two ends of the middle pipe section are connected with an oil hole of the compressor shell through the connecting assembly.

Furthermore, coupling assembling includes the first connecting piece of being connected with middle pipeline section, cup joints the second connecting piece that is used for connecting the oilhole outside first connecting piece, just between first connecting piece and the second connecting piece, all through welded fastening between second connecting piece and the oilhole.

Furthermore, the distance between the oil hole of the compressor shell corresponding to the upper cavity and the motor in the vertical direction is less than 10mm, and the oil hole of the compressor shell corresponding to the oil pool is located at one third of the height of the oil pool.

A compressor comprises the oil return system for the compressor, and further comprises a liquid storage tank communicated with a shell of the compressor, and an upper flange arranged below a motor, wherein the motor is connected with a rotating shaft, the rotating shaft penetrates through the upper flange and extends into the oil tank, and a cylinder is connected to the rotating shaft below the upper flange; the lower end of the cylinder is also connected with a lower flange.

An air conditioner comprises the compressor.

Compared with the prior art, the invention has the following beneficial effects:

the oil return pipe is arranged outside the compressor shell, the upper cavity inside the compressor shell is communicated with the oil pool, the oil-gas separation and collection assembly is arranged in the upper cavity of the compressor shell and serves as an auxiliary separation structure, the oil attachment area can be increased, the oil-gas separation effect is improved, oil discharged by a motor of the compressor can flow back to the oil pool through the oil return pipe, the situations of oil shortage and oil shortage of the compressor due to overhigh oil discharge amount are avoided, the problem of abrasion of parts of the compressor due to oil shortage or oil shortage in the operation process of the compressor is avoided, the service life of the compressor is prolonged, and the reliability of the compressor is improved.

Drawings

Fig. 1 is a schematic view of an oil return system for a compressor according to the present invention.

Fig. 2 is an enlarged view of a portion a of fig. 1.

Figure 3 is a top view of the oil and gas separation collection assembly 5 of the present invention.

Fig. 4 is a cross-sectional view B-B of the oil catcher in fig. 3.

FIG. 5 is a cross-sectional view C-C of the rib of FIG. 3.

The figure includes:

the oil-gas separation and collection device comprises a compressor shell 1, an upper cover 11, a lower cover 12, an upper cavity 13, an oil pool 14, oil holes 15, a liquid storage tank 2, a motor 3, an upper flange 31, a rotating shaft 32, a cylinder 33, a lower flange 36, an oil return pipe 4, an oil-gas separation and collection assembly 5, an oil collection frame 51, an oil collection part 52, a groove 53, a rib 54, a mouth part 55, an oil passage 56, a connection assembly 41, a first connection piece 411, a second connection piece 412 and a middle pipe section 42.

Detailed Description

To facilitate an understanding of the present invention for those skilled in the art, the present invention will be described in further detail below with reference to specific embodiments and accompanying drawings.

Referring to fig. 1 to 5, the oil return system for the compressor provided by the invention comprises a compressor housing 1, a motor 3 arranged in the compressor housing, an upper cover 11 arranged at the upper end of the compressor housing 1, and a lower cover 12 arranged at the bottom of the compressor housing 1, wherein an upper cavity 13 of the compressor is formed in a space between the upper cover 11 and the motor 3, an oil pool 14 for containing oil is formed between the lower cover 12 and the compressor housing 1, and the upper cavity 13 and the oil pool 14 are communicated by an oil return pipe 4 arranged on the outer wall of the compressor housing 1; the upper cavity 13 is internally provided with an oil-gas separation and collection assembly 5 for guiding oil to the oil return pipe 4, the oil-gas separation and collection assembly 5 is obliquely arranged relative to a horizontal plane (in this embodiment, the compressor housing 1 is generally in a circular tube shape, and the horizontal plane is also the radial plane of the compressor housing 1), and the lowest position of the oil-gas separation and collection assembly 5 corresponds to the liquid inlet of the oil return pipe 4. Because the oil-gas separation collection assembly 5 is arranged obliquely relative to the horizontal plane, oil can flow to the liquid inlet of the oil return pipe 4 under the action of gravity after being adhered to the oil-gas separation collection assembly 5.

The oil-gas separation and collection assembly 5 comprises an oil collection frame 51 which is connected with the inner wall of the compressor shell 1 and is used for supplying oil to flow, an oil collection part 52 which is arranged in the oil collection frame 51, a plurality of ribs 54 are further arranged between the oil collection frame 51 and the oil collection part 52, one end of each rib 54 is connected with the oil collection frame 51, and the other end of each rib 54 is connected with the oil collection part 52. The oil collecting frame 51 is further provided with a mouth 55 for guiding oil to the oil return pipe 4 at a position corresponding to the oil return pipe 4. In this embodiment, the rib 54 is provided with a groove 53 through which oil flows. In the present embodiment, the oil collecting portion 52 is specifically provided at the central position of the inner side of the oil collecting frame 41 in a plan view, and the oil collecting portion 52 is substantially circular, and the top surface thereof is recessed downward to form an arc-shaped concave surface.

The oil collecting frame is provided with an oil duct 56 for oil supply and circulation on one side facing the upper cover and facing inwards, the width of the oil duct 56 (namely the width in the left-right direction in fig. 4) is 10-20mm, the whole thickness can be ensured by the width, the reliability of the shell shrink-fit process is ensured, and the interference with lead-out wires and other components is avoided. In the process of collecting oil, the width of the oil passage 56 is 20mm in this embodiment, and the oil passage 56 is arc-shaped. The oil collecting frame 51 is in interference connection with the inner wall of the compressor shell 1, so that the oil collecting frame 51 and the compressor shell 1 are clamped tightly and are not easy to slide or fall off.

Oil holes 15 for communicating the oil return pipe 4 are formed in the positions, corresponding to the upper cavity 13, of the compressor shell 1 and the oil pool 14; the oil return pipe 4 comprises a connecting assembly and a middle pipe section 42, and both ends of the middle pipe section 42 are connected with the oil hole 15 of the compressor housing 1 through the connecting assembly 41. In this embodiment, the middle section 42 of the oil return tube 4 is substantially "U" shaped, and its two ends can be easily connected to the compressor housing 1.

The connecting assembly 41 includes a first connecting piece 411 connected to the middle pipe section 42, and a second connecting piece 412 sleeved outside the first connecting piece and used for connecting the oil hole, and the first connecting piece 411 and the second connecting piece 412, and the second connecting piece 412 and the oil hole 15 are fixed by welding.

The distance between the oil hole 15 of the compressor shell 1 corresponding to the position of the upper cavity 13 and the motor in the vertical direction is less than 10mm, in this embodiment, the oil hole is arranged at the position of 5mm, and if the size of the oil hole 15 at the position of the upper cavity 13 is too large, the whole size of the compressor is increased. The oil hole of the compressor shell 1 corresponding to the oil pool 14 is positioned at one third of the height of the oil pool 14, and the liquid level of oil is generally not more than one third during the use process, so that the oil can well flow into the oil pool 14. The position of the oil hole 15 and the size (aperture and length) of the oil return pipe 4 can be flexibly set according to the size of other parts of the compressor and the position of the upper cavity.

The inclination angle of the oil-gas separation and collection assembly 5 relative to the horizontal plane is an acute angle, the specific inclination angle is any degree from 15 degrees to 60 degrees, and the inclination angle of the oil-gas separation and collection assembly 5 can be adjusted according to specific product requirements during specific implementation.

When the oil-gas separation device works specifically, the motor 3 throws oil out of the compressor shell 1 and the oil-gas separation collection assembly 5 in the high-speed rotation process, the oil-gas separation collection assembly 5 can increase the attachment area of the oil, and the oil is used as an auxiliary separation structure to collect the oil on the upper cavity 13 of the compressor, and after the oil is attached to the oil-gas separation collection assembly 5, the oil flows into the oil hole 15 through the oil collection frame 51, flows into the oil return pipe 4 from the oil hole 15 and flows back into the oil pool 14, so that the oil-gas separation effect is improved.

The invention also provides a compressor, which comprises the oil return system for the compressor, and further comprises a liquid storage tank 2 communicated with the compressor shell 1, an upper flange 31 arranged below the motor, wherein a rotor of the motor 3 is connected with a rotating shaft 32, the motor and the oil tank are separated by the upper flange (namely, the space among the upper flange, the compressor shell and the lower cover forms the oil tank), the rotating shaft penetrates through the upper flange and extends downwards, the rotating shaft is connected with an air cylinder 33, and the lower end of the air cylinder is connected with a lower flange 36. In the embodiment, two air cylinders are arranged, the liquid storage tank and the compressor shell are communicated through two communicating pipelines, and the two communicating pipelines respectively correspond to the two air cylinders.

In addition, the invention also provides an air conditioner which comprises the compressor.

The oil return pipe is arranged outside the compressor shell, the upper cavity inside the compressor shell is communicated with the oil pool, the oil-gas separation and collection assembly is arranged in the upper cavity of the compressor shell and serves as an auxiliary separation structure, the oil attachment area can be increased, the oil-gas separation effect is improved, oil discharged by a motor of the compressor can flow back to the oil pool through the oil return pipe, the situations of oil shortage and oil shortage of the compressor due to overhigh oil discharge amount are avoided, the problem of abrasion of parts of the compressor due to oil shortage or oil shortage in the operation process of the compressor is avoided, the service life of the compressor is prolonged, and the reliability of the compressor is improved.

In the description of the present invention, it is to be understood that the indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings and are only for convenience in describing the present invention and simplifying the description, but are not intended to indicate or imply that the indicated devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the present invention.

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

In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," and the like are to be construed broadly, e.g., as meaning permanently attached, removably attached, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

While the invention has been described in conjunction with the specific embodiments set forth above, it is evident that many alternatives, modifications, and variations will be apparent to those skilled in the art in light of the foregoing description. Accordingly, it is intended to embrace all such alternatives, modifications, and variations that fall within the scope of the included claims.