Oil separation device and compressor

Abstract

The invention relates to the technical field of compressors, and provides an oil separation device and a compressor. The oil separation device comprises an oil separation device body and a guide separator; an oil-gas separation structure is formed in the oil separation device body, the oil-gas separation structure comprises a silencing expansion chamber, a first connecting channel and an oil-gas separation chamber, and a first exhaust channel is further formed in the oil separation device body; the guiding separator comprises a guiding separation pipe, a gap is formed between the outer wall of the guiding separation pipe and the inner wall of the oil-gas separation chamber, a second exhaust channel is formed in the guiding separation pipe, the gas outlet end of the first connecting channel is located at the top of the oil-gas separation chamber, and the gas inlet end of the second exhaust channel is located on the lower middle portion of the oil-gas separation chamber. According to the oil separation device provided by the invention, the oil drops and the gas can be separated by utilizing the density difference between the tiny oil drops and the gas in the oil-gas mixture in the compressor, the tiny lubricating oil drops are prevented from entering the system along with the compressed gas, and the requirements of noise reduction and oil-gas separation under the scenes of constant gravity and tiny gravity are met.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of compressors, in particular to an oil separation device and a compressor. BACKGROUND

[0002] The existing rotary compressor drives the oil supply through the rotation of the crankshaft to drive the oil supply vane or the spiral pump body, mainly relying on the high-speed rotation of the crankshaft to drive the flow of lubricating oil. However, the oil pump pressure difference of this way is small, and the oil pump self-suction ability is poor, especially at low speed or low oil level, which can easily lead to insufficient oil supply. The linear compressor drives the oil pump through the vibration of the machine body, but also faces the problems of difficult start and poor self-suction ability.

[0003] For the compressor in a variable installation posture and a small gravity environment (such as a car, an airplane, a high-speed train, an aircraft, etc.), the traditional oil pump method (depending on gravity, centrifugal force, capillary force, etc.) cannot effectively ensure the lubrication and efficient oil sealing of the moving pair, thereby affecting the service life and operating efficiency of the compressor. In these scenarios, changes in the installation posture or gravity acceleration of the compressor can cause unstable lubricating oil supply, affecting its normal work.

[0004] Pumping oil through the pressure difference constructed by the suction and discharge pressure of the compressor itself can ensure the reliability of the oil pumping in a variable installation posture and a small gravity environment, but the pressure difference pumping oil has sufficient oil supply power and large oil supply flow. In order to prevent a large amount of lubricating oil from being discharged into the system, an oil separator needs to be provided to ensure that there is enough lubricating oil in the compressor housing for lubrication. However, in the case of changes in the installation posture and a small gravity field, the existing oil separation device cannot fully separate the lubricating oil, so that part of the lubricating oil will enter the system with the compressed gas, and the lubricating oil entering the refrigeration system is difficult to be carried back to the inside of the compressor quickly by the refrigerant, which seriously affects the lubrication and operating efficiency of the moving pair of the compressor. In these scenarios, changes in the installation posture or gravity acceleration of the compressor without efficient built-in oil separation can cause a large amount of lubricating oil in the compressor to enter the refrigeration system, and the complex refrigeration system circuit makes it difficult to return the oil, which reduces the lubrication effect, further causes the mechanical noise to increase, and seriously affects the normal work of the compressor. At the same time, the airflow pulsation noise caused by the compressor exhaust mixed with lubricating oil seriously affects the comfort of the user, which is also an urgent industry problem to be solved. SUMMARY

[0005] The present application provides an oil separation device and a compressor to solve the defect that the existing oil separation device has poor oil separation effect in a normal gravity and a small gravity field.

[0006] In one aspect, the present application provides an oil separation device, comprising: an oil separation device body and a guide separator.

[0007] The oil separation device body is formed with an oil-gas separation structure, the oil-gas separation structure comprises a sound attenuation expansion chamber, a first connecting channel and an oil-gas separation chamber which are sequentially communicated, and a first exhaust channel is further formed in the oil separation device body; the guide separator comprises a guide separation pipe, the guide separation pipe is located in the oil-gas separation chamber, a gap is arranged between the outer wall of the guide separation pipe and the inner wall of the oil-gas separation chamber, a second exhaust channel is formed in the guide separation pipe, the gas outlet end of the first connecting channel is located at the top of the oil-gas separation chamber, the gas inlet end of the second exhaust channel is located at the middle and lower part of the oil-gas separation chamber, the gap is communicated with the second exhaust channel, and the second exhaust channel is communicated with the first exhaust channel.

[0008] According to the oil separation device provided by the application, the included angle α between the axis of the first connecting channel and the axis of the oil-gas separation chamber is 60°≤α≤120°.

[0009] According to the oil separation device provided by the application, the guide separator further comprises a spiral blade, the spiral blade is arranged on the outer wall of the guide separation pipe, the outer edge of the spiral blade is connected with the inner wall of the oil-gas separation chamber, so as to form a spiral separation channel in the oil-gas separation chamber through the spiral blade, and the spiral separation channel is communicated with the second exhaust channel.

[0010] According to the oil separation device provided by the application, the outer edge of the spiral blade is sealingly connected with the inner wall of the oil-gas separation chamber.

[0011] According to the oil separation device provided by the application, a plurality of oil-gas separation structures are formed in the oil separation device body, and the plurality of oil-gas separation structures are sequentially connected in series or are connected in parallel with each other.

[0012] According to the oil separation device provided by the application, the oil-gas separation structure further comprises an oil outlet channel, and the oil outlet channel is communicated with the bottom of the oil-gas separation chamber.

[0013] Another aspect of the application provides a compressor, comprising a shell and an oil separation device.

[0014] A sealing cavity is formed in the shell, and the oil separation device is arranged in the sealing cavity.

[0015] According to the compressor provided by the application, a partition plate and an oil pumping structure are further arranged, the partition plate is located in the sealing cavity and divides the sealing cavity into a low-pressure cavity and a high-pressure cavity, the gas inlet end of the oil-gas separation structure is communicated with the gas outlet hole of the compressor, the second exhaust channel is communicated with the gas outlet end of the high-pressure cavity, the inlet end of the oil pumping structure is communicated with the high-pressure cavity, and the outlet end of the oil pumping structure is communicated with the moving pair of the compressor.

[0016] The compressor provided by the application further comprises a sealing gasket arranged on an end wall of the oil separation device body near the high-pressure cavity, and the air inlet hole is communicated with the sound-damping expansion chamber.

[0017] The compressor provided by the application is a linear compressor, a rotary compressor, a scroll compressor, a screw compressor, a centrifugal compressor or an axial compressor.

[0018] The oil separation device and the compressor provided by the application can separate oil droplets and gas by using the density difference between the small oil droplets and the gas in the oil-gas mixture in the compressor, prevent the small lubricating oil droplets from entering the system with the compressed gas, and meet the oil-gas separation requirements in the normal gravity and small gravity scenarios. Specifically, by forming the oil-gas separation structure on the oil separation device body, the oil-gas mixture can be introduced into the oil-gas separation chamber through the first connecting channel by the sound-damping expansion chamber. Since the guide separation pipe of the guide separator is located in the oil-gas separation chamber, a gap is arranged between the outer wall of the guide separation pipe and the inner wall of the oil-gas separation chamber, the air outlet end of the first connecting channel is located at the top of the oil-gas separation chamber, the air inlet end of the second exhaust channel formed in the guide separation pipe is located at the middle and lower part of the oil-gas separation chamber, after the oil-gas mixture enters the oil-gas separation chamber, the oil droplets can first flow from top to bottom through the gap, so that the oil droplets gather at the bottom of the oil-gas separation chamber under the action of their own gravity, and then the gas flows from bottom to top into the second exhaust channel and is finally discharged through the first exhaust channel.

[0019] Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will become apparent to those skilled in the art upon examination of the following and / or can be learned by practice of the application. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the application or in the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are some embodiments of the application, and those skilled in the art can also obtain other drawings according to these drawings without any creative effort.

[0021] Figure 1 is one of the overall structure schematic diagrams of the oil separation device provided by one of the embodiments of the application.

[0022] Figure 2 is the second overall structure schematic diagram of the oil separation device provided by one of the embodiments of the application.

[0023] Figure 3 is one of the cross-sectional views of the oil separation device provided by one of the embodiments of the application.

[0024] Figure 4is a cross-sectional view of the oil separation device provided by one of the embodiments of the present application.

[0025] Figure 5 is a cross-sectional view of the guide separator in the oil separation device provided by one of the embodiments of the present application.

[0026] Figure 6 is one of the cross-sectional views of the oil separation device provided by the second embodiment of the present application.

[0027] Figure 7 is the second cross-sectional view of the oil separation device provided by the second embodiment of the present application.

[0028] Figure 8 is a cross-sectional view of the guide separator in the oil separation device provided by the second embodiment of the present application.

[0029] Figure 9 is a cross-sectional view of the linear compressor provided by the embodiment of the present application.

[0030] Figure 10 is a cross-sectional view of the rotary compressor provided by the embodiment of the present application.

[0031] Figure 11 is a cross-sectional view of the scroll compressor provided by the embodiment of the present application.

[0032] Reference signs: 100, oil separation device; 110, oil separation device body; 111, oil-gas separation structure; 1111, sound-damping expansion chamber; 1112, first connecting passage; 1113, oil-gas separation chamber; 1114, oil outlet passage; 112, first exhaust passage; 113, second connecting passage; 120, guide separator; 121, mounting portion; 122, guide separation tube; 1221, second exhaust passage; 123, helical blade; 200, housing; 210, sealing cavity; 211, low-pressure cavity; 212, high-pressure cavity; 300, partition plate; 400, oil pumping structure; 500, sealing gasket. DETAILED DESCRIPTION

[0033] In order to make the objectives, technical solutions and advantages of the present application clearer, the technical solutions in the present application will be described clearly and completely below with reference to the drawings in the present application. Obviously, the described embodiments are some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0034] In the description of the embodiments of the present invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, and 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. Therefore, they should not be construed as limitations on the embodiments of the present invention. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0035] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present invention according to the specific circumstances.

[0036] In embodiments of the present invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0037] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0038] The following is combined Figures 1 to 11 This invention describes the oil separation device and compressor provided by the present invention.

[0039] See Figures 1 to 5 As shown, an oil separation device 100 provided in one embodiment of the present invention includes: an oil separation device body 110 and a guide separator 120.

[0040] The oil separator body 110 has an oil-gas separation structure 111, which includes a silencing expansion chamber 1111, a first connecting channel 1112, and an oil-gas separation chamber 1113 connected in sequence. A first exhaust channel 112 is also formed inside the oil separator body 110. The guide separator 120 includes a guide separation pipe 122, which is located inside the oil-gas separation chamber 1113. A gap is provided between the outer wall of the guide separation pipe 122 and the inner wall of the oil-gas separation chamber 1113. A second exhaust channel 1221 is formed inside the guide separation pipe 122. The outlet end of the first connecting channel 1112 is located at the top of the oil-gas separation chamber 1113, and the inlet end of the second exhaust channel 1221 is located in the middle and lower part of the oil-gas separation chamber 1113. The gap is connected to the second exhaust channel, and the second exhaust channel 1221 is connected to the first exhaust channel 112.

[0041] The oil separation device 100 and compressor provided by the present invention can separate oil droplets and gas by utilizing the density difference between tiny oil droplets and gas in the oil-gas mixture inside the compressor, preventing tiny lubricating oil droplets from entering the system with the compressed gas, and meeting the oil-gas separation requirements under normal gravity and microgravity scenarios. Specifically, by forming an oil-gas separation structure 111 on the oil separator body 110, the oil-gas mixture can be introduced into the oil-gas separation chamber 1113 through the first connecting channel 1112 using the silencing expansion chamber 1111. Since the guide separation pipe 122 of the guide separator 120 is located inside the oil-gas separation chamber 1113, there is a gap between the outer wall of the guide separation pipe 122 and the inner wall of the oil-gas separation chamber 1113. The outlet end of the first connecting channel 1112 is located at the top of the oil-gas separation chamber 1113, and the inlet end of the second exhaust channel 1221 formed inside the guide separation pipe 122 is located in the middle and lower part of the oil-gas separation chamber 1113. After the oil-gas mixture enters the oil-gas separation chamber 1113, it can first flow from top to bottom through the gap, so that the oil droplets gather at the bottom of the oil-gas separation chamber 1113 under their own gravity. Then the gas enters the second exhaust channel 1221 and flows from bottom to top and is finally discharged through the first exhaust channel 112.

[0042] Specifically, the oil separation device 100 includes an oil separation device body 110 and a guide separator 120. The oil separation device body 110 is the basic structure of the entire device and is preferably made of metal. An oil-gas separation structure 111 can be machined onto the oil separation device body 110 using machine tools or other equipment. The oil-gas separation structure 111 includes a silencing expansion chamber 1111, a first connecting channel 1112, and an oil-gas separation chamber 1113 connected in sequence. The silencing expansion chamber 1111 is located at the air inlet end face of the oil separation device body 110 and is used to silence the oil-gas mixture (the silencing expansion chamber, through a special structural design, can effectively slow down the fluid velocity and reduce noise transmission). The first connecting channel 1112 connects the silencing expansion chamber 1111 and the oil-gas separation chamber 1113. By setting the axial direction of the first connecting channel 1112, the flow direction of the oil-gas mixture into the oil-gas separation chamber 1113 can be controlled. The oil-gas separation chamber 1113 provides space for gas-liquid separation. The guide separator 120 is used to guide the oil-gas mixture entering the oil-gas separation chamber 1113 and achieve oil-gas separation during the guiding process. The guide separator 120 includes a mounting part 121 and a guide separation pipe 122. The mounting part 121 is used to fix the guide separator 120 as a whole to the oil separation device body 110. The guide separation pipe 122 is located inside the oil-gas separation chamber 1113. A gap is provided between the outer wall of the guide separation pipe 122 and the inner wall of the oil-gas separation chamber 1113. This gap can form a guide channel, allowing the oil-gas mixture to flow from top to bottom. It should be noted that the number of oil-gas separation structures 111 on the oil separator body 110 is at least one, that is, it can be either a single structure or multiple structures, depending on the spatial layout of the other necessary structures on the oil separator body 110 and the size of the installation space inside the compressor. For example, when the space occupied by the other necessary structures on the oil separator body 110 is large and / or the installation space inside the compressor is small, only a single oil-gas separation structure 111 can be provided on the oil separator body 110. Conversely, when the space occupied by the other necessary structures on the oil separator body 110 is small and / or the installation space inside the compressor is large, multiple oil-gas separation structures 111 can be provided on the oil separator body 110.

[0043] When the oil separator body 110 is provided with multiple oil-gas separation structures 111, the multiple oil-gas separation structures 111 can be connected in parallel to improve the oil-gas separation efficiency and increase the exhaust efficiency and exhaust volume. Alternatively, the multiple oil-gas separation structures 111 can also be connected in series, that is, the gas discharged from the upper oil-gas separation structure 111 is introduced into the lower oil-gas separation structure 111 for further oil-gas separation, so as to improve the separation effect of oil-gas separation.

[0044] The guide separation pipe 122 is located inside the oil-gas separation chamber 1113. The two can be arranged coaxially or non-coaxially according to actual needs (such as spatial layout factors), and there is no special limitation on this. For example, in this embodiment, the guide separation pipe 122 is located inside the oil-gas separation chamber 1113 and the two are arranged coaxially to form a uniformly distributed gap between the outer wall of the guide separation pipe 122 and the inner wall of the oil-gas separation chamber 1113.

[0045] The mounting portion 121 of the guide separator 120 can be fixed to the oil separator body 110 by means of threaded fasteners or snap-fit ​​(such as interference fit), and there is no special limitation thereto. For example, in this embodiment, mounting holes are provided at corresponding positions of the guide separator 120 and the oil separator body 110, and the mounting portion 121 of the guide separator 120 is fixed to the oil separator body 110 by screws.

[0046] See Figure 4 As shown, according to some embodiments of the present invention, the included angle α between the axis of the first connecting channel 1112 and the axis of the oil-gas separation chamber 1113 is 60°≤α≤120°.

[0047] By setting the included angle α between the axis of the first connecting channel 1112 and the axis of the oil-gas separation chamber 1113 to 60°≤α≤120°, the direction of the oil-gas mixture can be abruptly changed when it enters the oil-gas separation chamber 1113, and under the constraint of the outer wall of the guide separation pipe 122, it can form a fluid flowing from top to bottom, which facilitates the separation of oil and gas by utilizing the gravity difference between oil droplets and gas in the oil-gas mixture, thereby improving the oil-gas separation effect.

[0048] As an example, the included angle α between the axis of the first connecting channel 1112 and the axis of the oil-gas separation chamber 1113 can be 60°, 80°, 90°, 100° or 120°, etc.

[0049] See Figure 4 As shown, according to some embodiments of the present invention, the included angle α between the axis of the first connecting channel 1112 and the axis of the oil-gas separation chamber 1113 is 90°.

[0050] By setting the included angle α between the axis of the first connecting channel 1112 and the axis of the oil-gas separation chamber 1113 to 90°, the first connecting channel 1112 and the oil-gas separation chamber 1113 can be made easier to process and manufacture while ensuring the guiding effect on the oil-gas mixture.

[0051] See Figures 6 to 8As shown, according to some embodiments of the present invention, the guide separator 120 further includes a helical blade 123, which is disposed on the outer wall of the guide separation tube 122. The outer edge of the helical blade 123 is connected to the inner wall of the oil-gas separation chamber 1113 so as to form a helical separation channel in the oil-gas separation chamber 1113 through the helical blade 123. The helical separation channel is connected to the second exhaust channel 1221.

[0052] By setting a spiral blade 123 on the outer wall of the guide separation tube 122 and forming a spiral separation channel between the spiral blade 123 and the inner wall of the oil-gas separation chamber 1113, the gas-liquid mixture entering the gap can form a spiral fluid under the action of the spiral separation channel. Due to the large density difference between oil droplets and gas in the oil-gas mixture, under the action of centrifugal force, the oil droplets will adhere to the inner wall of the oil-gas separation chamber 1113 and gradually flow to the bottom of the oil-gas separation chamber 1113 after converging, thus achieving efficient oil-gas separation under microgravity scenarios.

[0053] It should be noted that the spiral blade 123 can be used as an independent component and fixedly connected to the outer wall of the guide separation tube 122 by welding or other means. Alternatively, the spiral blade 123 can be integrally set with the guide separation tube 122, and during processing, the guide separation tube 122 with the spiral blade 123 on the outer wall can be directly constructed.

[0054] The connection between the outer edge of the spiral blade 123 and the inner wall of the oil-gas separation chamber 1113 can be either a sealed connection or a non-sealed connection. A sealed connection avoids gaps between the outer edge of the spiral blade 123 and the inner wall of the oil-gas separation chamber 1113, preventing these gaps from interfering with the flow of the oil-gas mixture and ensuring stable flow of the oil-gas mixture within the spiral separation channel. A non-sealed connection allows for small gaps between the outer edge of the spiral blade 123 and the inner wall of the oil-gas separation chamber 1113. Without significantly affecting the flow of the oil-gas mixture, these gaps allow the collected oil droplets to pass through, enabling them to quickly accumulate at the bottom of the oil-gas separation chamber 1113 without flowing down layer by layer through the spiral blade 123.

[0055] See Figure 6 and Figure 7 As shown, according to some embodiments of the present invention, the outer edge of the spiral blade 123 is sealed to the inner wall of the oil-gas separation chamber 1113.

[0056] By setting the outer edge of the spiral blade 123 and the inner wall of the oil-gas separation chamber 1113 to be sealed, gaps between the outer edge of the spiral blade 123 and the inner wall of the oil-gas separation chamber 1113 can be avoided, thus preventing gaps from interfering with the flow of the oil-gas mixture and ensuring stable flow of the oil-gas mixture in the spiral separation channel.

[0057] See Figure 3 andFigure 6 As shown, according to some embodiments of the present invention, a plurality of oil-gas separation structures 111 are formed in the body 110 of the oil separation device, and the plurality of oil-gas separation structures 111 are connected in series.

[0058] By setting multiple oil-gas separation structures 111 on the body 110 of the oil separator and connecting the multiple oil-gas separation structures 111 in series, the oil-gas separation effect can be improved. That is, the gas discharged from the upper oil-gas separation structure 111 is introduced into the lower oil-gas separation structure 111 for further oil-gas separation, so as to improve the separation effect of oil-gas separation.

[0059] As an example, in this embodiment, the oil separator body 110 is provided with two oil-gas separation structures 111 and two corresponding guide separators 120. Along the flow direction of the oil-gas mixture, a second connecting channel is provided between the upstream guide separator 120 and the oil separator body 110 (partially located in the mounting part 121 of the guide separator 120 and partially located in the oil separator body 110). The fluid separated by the upstream oil-gas separation structure 111 and the guide separator 120 will enter the second connecting channel and enter the silencing expansion chamber 1111 of the downstream oil-gas separation structure 111 for further oil-gas separation.

[0060] In some embodiments, a plurality of oil-gas separation structures 111 are formed within the body 110 of the oil separator. The plurality of oil-gas separation structures 111 are connected in parallel to each other to improve the oil-gas separation efficiency and increase the exhaust efficiency and exhaust volume.

[0061] Specifically, when multiple oil-gas separation structures 111 are connected in parallel, the oil-gas mixture enters simultaneously through the silencer expansion chambers 1111 of multiple oil-gas separation structures 111. After the oil-gas separation is completed, it can be discharged through multiple second exhaust channels 1221 into the first exhaust channel 112.

[0062] See Figure 3 and Figure 6 As shown, according to some embodiments of the present invention, the oil-gas separation structure 111 further includes an oil outlet channel 1114, which is connected to the bottom of the oil-gas separation chamber 1113.

[0063] By setting up the oil outlet channel 1114, the oil that has gathered at the bottom of the oil-gas separation chamber 1113 can be discharged to a set position (such as a set cavity inside the compressor housing 200) after the oil-gas separation is completed, thus avoiding excessive oil accumulation at the bottom of the oil-gas separation chamber 1113.

[0064] The compressor provided by the present invention will be described below. The compressor described below can be referred to in correspondence with the oil separator 100 described above.

[0065] SeeFigures 9 to 11 As shown, the compressor provided in this embodiment of the invention includes: a housing 200 and an oil separator 100. A sealed cavity 210 is formed inside the housing 200, and the oil separator 100 is disposed inside the sealed cavity 210. The compressor provided by the present invention, by employing the oil separation device 100 as described in any of the preceding embodiments, can also separate oil droplets and gas by utilizing the density difference between tiny oil droplets and gas in the oil-gas mixture inside the compressor, preventing tiny lubricating oil droplets from entering the system along with the compressed gas, and meeting the oil-gas separation requirements under normal gravity and microgravity scenarios.

[0066] It should be noted that the compressor referred to in the embodiments of the present invention can specifically be a linear compressor (see...). Figure 9 As shown), rotary compressor (see...) Figure 10 As shown), scroll compressor (see) Figure 11 (as shown), screw compressor, centrifugal compressor or axial compressor.

[0067] See Figures 9 to 11 As shown, according to some embodiments of the present invention, the compressor further includes a partition plate 300 and an oil pump structure 400. The partition plate 300 is located inside the sealed cavity 210 and divides the sealed cavity 210 into a low-pressure cavity 211 and a high-pressure cavity 212. The inlet end of the oil-gas separation structure 111 is connected to the outlet port of the compressor. The second exhaust channel 1221 is connected to the outlet end of the high-pressure cavity 212. The inlet end of the oil pump structure 400 is connected to the high-pressure cavity 212, and the outlet end of the oil pump structure 400 is connected to the moving part of the compressor.

[0068] By setting a partition plate 300 and using a partition to divide the sealed cavity 210 inside the housing 200 into a low-pressure cavity 211 and a high-pressure cavity 212, the lubricating oil can enter the oil pump structure 400 under the driving action of the pressure difference, and enter the moving pair of the compressor (such as the fitting clearance between the crankshaft and the crankshaft support), and then return to the low-pressure cavity 211.

[0069] In addition, since the method of using differential pressure to drive lubricating oil results in a larger pressure of the mixture, it increases the difficulty of oil-gas separation. Ordinary oil-gas separation devices cannot perform effective oil-gas separation. In this embodiment of the invention, a guide separator 120 with spiral blades 123 is used, combined with multiple oil-gas separation structures 111 connected in series, which can adapt to compressors that use differential pressure to drive lubricating oil and ensure their oil-gas separation effect.

[0070] See Figures 9 to 11As shown, according to some embodiments of the present invention, the compressor further includes: a sealing gasket 500, the sealing gasket 500 being disposed on the end wall of the oil separator body 110 near the high pressure chamber 212, the sealing gasket 500 being provided with an air inlet, the air inlet being communicating with the silencing expansion chamber 1111 of the oil-gas separation structure 111.

[0071] By setting the sealing gasket 500, the oil-gas mixture can be smoothly guided into the silencer expansion chamber 1111, preventing the oil-gas mixture from leaking into other parts of the compressor.

[0072] Specifically, the sealing gasket 500 can be disposed between the crankshaft support and the oil separator 100 and fixed by the crankshaft support and the oil separator 100.

[0073] When the oil separator body 110 has multiple oil-gas separation structures 111 connected in series, along the flow direction of the oil-gas mixture, the compressor's outlet is connected to the silencing expansion chamber 1111 of the upstream oil-gas separation structure 111, and the sealing gasket 500 seals the silencing expansion chamber 1111 of the downstream oil-gas separation structure 111, thereby achieving step-by-step separation of the oil-gas mixture. When the oil separator body 110 has multiple oil-gas separation structures 111 connected in parallel, the sealing gasket 500 has multiple corresponding air inlets, which are connected to the corresponding silencing expansion chambers 1111.

[0074] In some embodiments, the cross-sectional dimensions of the housing 200 can be set according to the size of its internal cavities. For example, the cross-sectional dimension of the housing 200 is larger at the location of the low-pressure cavity 211 where the motor is located, and smaller at the location of the high-pressure cavity 212 where the compression components are located. The oil pumping structure 400 uses the high-low pressure difference between the high-pressure cavity 211 and the high-pressure cavity 212 constructed by the partition plate 300 to achieve oil pumping.

[0075] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An oil separation device, characterized in that, include: The oil separator body has an oil-gas separation structure, which includes a silencing expansion chamber, a first connecting channel and an oil-gas separation chamber connected in sequence. The oil separator body also has a first exhaust channel. A guide separator includes a guide separation pipe located within the oil-gas separation chamber. A gap is provided between the outer wall of the guide separation pipe and the inner wall of the oil-gas separation chamber. A second exhaust channel is formed within the guide separation pipe. The outlet end of the first connecting channel is located at the top of the oil-gas separation chamber, and the inlet end of the second exhaust channel is located in the lower middle part of the oil-gas separation chamber. The gap communicates with the second exhaust channel, and the second exhaust channel communicates with the first exhaust channel.

2. The oil separation device according to claim 1, characterized in that, The angle α between the axis of the first connecting channel and the axis of the oil-gas separation chamber is 60°≤α≤120°.

3. The oil separation device according to claim 1, characterized in that, The guide separator also includes a spiral blade, which is disposed on the outer wall of the guide separation tube. The outer edge of the spiral blade is connected to the inner wall of the oil-gas separation chamber to form a spiral separation channel in the oil-gas separation chamber through the spiral blade. The spiral separation channel is connected to the second exhaust channel.

4. The oil separation device according to claim 3, characterized in that, The outer edge of the spiral blade is sealed to the inner wall of the oil-gas separation chamber.

5. The oil separation device according to any one of claims 1 to 4, characterized in that, The oil separation device body has multiple oil-gas separation structures, which are connected in series or in parallel.

6. The oil separation device according to any one of claims 1 to 4, characterized in that, The oil-gas separation structure also includes an oil outlet channel, which is connected to the bottom of the oil-gas separation chamber.

7. A compressor, characterized in that, include: A housing having a sealed cavity formed within it; The oil separation device according to any one of claims 1 to 6, wherein the oil separation device is disposed within the sealed cavity.

8. The compressor according to claim 7, characterized in that, Also includes: A partition plate is located inside the sealed cavity and divides the sealed cavity into a low-pressure cavity and a high-pressure cavity. The air inlet of the oil-gas separation structure is connected to the air outlet of the compressor, and the second exhaust channel is connected to the air outlet of the high-pressure cavity. The oil pump structure has an inlet end connected to the high-pressure chamber and an outlet end connected to the moving part of the compressor.

9. The compressor according to claim 8, characterized in that, Also includes: A sealing gasket is provided on the end wall of the oil separator body near the high-pressure chamber. The sealing gasket has an air inlet, which communicates with the silencing expansion chamber.

10. The compressor according to any one of claims 7 to 9, characterized in that, The compressor is a linear compressor, rotary compressor, scroll compressor, screw compressor, centrifugal compressor, or axial compressor.

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