Oil and gas separation cylinder and compressor

Abstract

The utility model belongs to compressor technical field discloses an oil-gas separation type cylinder and compressor. The oil-gas separation type cylinder includes cylinder body and oil separation spare, and the cylinder body is cavity structure, and includes main exhaust passage, vice exhaust passage, main exhaust hole, vice exhaust hole, oil return hole, oil return pipeline and back gas passage, and the top of main exhaust passage is linked together with main exhaust hole, and the bottom of main exhaust passage is linked together with oil return pipeline through oil return hole, and vice exhaust passage is located in one side of main exhaust passage, and the top of vice exhaust passage is linked together with vice exhaust hole, and the bottom of vice exhaust passage is linked together with oil return pipeline, and back gas passage is located in one side of main exhaust passage, and one end of back gas passage is communicated with oil return pipeline, and the other end of back gas passage is communicated with main exhaust passage, and oil separation spare is fixedly arranged in main exhaust passage, and is used for separating oil gas that enters main exhaust passage. The oil-gas separation type cylinder can improve oil-gas separation effect, and simple structure is safe and reliable.

Description

Technical Field

[0001] This utility model relates to the field of compressor technology, and in particular to an oil-gas separation cylinder and compressor. Background Technology

[0002] The compressor is a crucial component of an automotive air conditioning system, responsible for compressing and transporting refrigerant vapor. The moving parts inside the compressor experience high stress and must operate in a well-lubricated environment. However, when the compressor compresses and discharges gas, the high-temperature, high-pressure gas inevitably carries a small amount of lubricating oil with it.

[0003] To reduce the amount of lubricating oil carried by the compressed gas, some compressors are equipped with an oil-gas separation structure. Existing oil-gas separation structures create a vortex by tangentially positioning the exhaust port and exhaust pipe. After passing through the exhaust oil separator, the oil flows back along the exhaust pipe wall into the return oil pipe. However, the separation effect of existing compressor oil-gas separation structures is not ideal. The oil is still subject to secondary dispersion by the airflow, forming atomized oil droplets that are discharged, resulting in a reduced amount of returned oil.

[0004] Therefore, it is necessary to design an oil-gas separation cylinder and a compressor with it to solve the problems existing in the prior art. Utility Model Content

[0005] One objective of this invention is to provide an oil-gas separation cylinder that can further improve the oil-gas separation effect, and is simple in structure and safe and reliable.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] Oil-gas separated cylinders include:

[0008] The cylinder body has a cavity structure and includes a main exhaust passage, a secondary exhaust passage, a main exhaust port, a secondary exhaust port, an oil return port, an oil return pipe, and a gas return passage. The top of the main exhaust passage is connected to the main exhaust port, and the bottom of the main exhaust passage is connected to the oil return pipe via the oil return port. The secondary exhaust passage is located on one side of the main exhaust passage, and its top is connected to the secondary exhaust port. Its bottom is connected to the oil return pipe. The gas return passage is located on one side of the main exhaust passage, and one end of the gas return passage is connected to the oil return pipe, while the other end of the gas return passage is connected to the main exhaust passage.

[0009] An oil separator is fixedly installed inside the main exhaust channel and is used to separate the oil and gas entering the main exhaust channel.

[0010] Preferably, the cylinder body includes a cylinder head with an exhaust groove recessed thereon for receiving the oil and gas. An exhaust pipe is arranged in the exhaust groove along the direction of gravity. The exhaust pipe has a main exhaust channel connected to the external environment, and the side wall of the exhaust pipe has a main exhaust hole. The exhaust groove is connected to the main exhaust hole. The bottom of the exhaust groove has an oil return hole. The oil separator is fixed in the exhaust pipe. The auxiliary exhaust channel is located on one side of the exhaust groove and is connected to the exhaust groove through the auxiliary exhaust hole.

[0011] Preferably, the cylinder body further includes a stationary plate, which is sealed and fastened to the cylinder head. The cylinder head has an exhaust groove on its end face facing the stationary plate, and a vent hole is provided in the stationary plate to discharge the oil and gas into the exhaust groove.

[0012] Preferably, the cylinder head surface facing the stationary plate is recessed with a first flow groove, and the first flow groove is connected to the auxiliary exhaust port.

[0013] The stationary disc is recessed on the end face facing the cylinder head and has a second flow groove. When the stationary disc is fastened to the cylinder head, the first flow groove and the second flow groove cooperate to form the auxiliary exhaust channel. The top of the second flow groove is connected to the first flow groove, and the bottom of the second flow groove is connected to the oil return pipe.

[0014] Preferably, the cylinder head face facing the stationary plate is further recessed with a first oil return groove, and the top wall of the first oil return groove is connected to the oil return hole and the gas return passage.

[0015] The stationary disc is recessed on the end face of the cylinder head and has a second oil return groove. A return hole is provided between the second oil return groove and the second flow groove. When the stationary disc is fastened to the cylinder head, the first oil return groove and the second oil return groove cooperate to form the oil return pipe. The second oil return groove is connected to the second flow groove through the return hole.

[0016] Preferably, around the axial direction of the cylinder head, at least two annular grooves are recessed on the end face of the cylinder head facing the stationary plate. The at least two annular grooves surround the exhaust groove, and the exhaust pipe passes through the exhaust groove and the annular grooves. One of the annular grooves defines the first flow groove, and the remaining at least one annular groove defines the weight reduction groove.

[0017] Preferably, with a vertical plane passing through the cylinder head axis as the center, two annular grooves are provided on each side of the vertical plane. The two annular grooves on one side of the vertical plane define the weight reduction groove, and the two annular grooves on the other side of the vertical plane define the first flow groove and the weight reduction groove, respectively. The height of the first flow groove is higher than that of the weight reduction groove.

[0018] Preferably, six annular grooves are provided, with one annular groove at the top and one at the bottom of the cylinder head. The annular groove at the bottom of the cylinder head defines the first oil return groove, and the annular groove at the top of the cylinder head defines the weight reduction groove.

[0019] Preferably, the cylinder body further includes an elastic buffer plate, which is sealed over the vent hole. When the oil and gas pass through the vent hole, the elastic buffer plate can spring open to connect the vent hole with the exhaust groove.

[0020] Another objective of this invention is to provide a compressor with the aforementioned oil-gas separation cylinder, which reduces the loss of lubricating oil in the compressor, reduces the wear of moving parts inside the compressor, and ensures the safety and stability of the compressor during use.

[0021] To achieve this objective, the present invention adopts the following technical solution:

[0022] Compressors, including the aforementioned oil-gas separation type cylinders.

[0023] The beneficial effects of this utility model are:

[0024] This embodiment provides an oil-gas separation type cylinder, including a cylinder body and an oil separator. The cylinder body has a cavity structure and includes a main exhaust passage, a secondary exhaust passage, a main exhaust port, a secondary exhaust port, an oil return port, an oil return pipe, and a gas return passage. The top of the main exhaust passage is connected to the main exhaust port, and the bottom of the main exhaust passage is connected to the oil return pipe via the oil return port. The secondary exhaust passage is located on one side of the main exhaust passage, with its top connected to the secondary exhaust port and its bottom connected to the oil return pipe. The gas return passage is located on one side of the main exhaust passage, with one end connected to the oil return pipe and the other end connected to the main exhaust passage. The oil separator is fixedly installed inside the main exhaust passage and can separate the oil and gas entering the main exhaust passage. By setting up the secondary exhaust passage, the exhaust path can be effectively extended, increasing the surface area of ​​contact between the oil and gas and the cylinder body wall, thus increasing the probability of lubricating oil adhering to the cylinder body wall. In addition, the return gas passage can guide the gas in the auxiliary exhaust passage back into the main exhaust passage for processing, so that the residual lubricating oil in the gas can be separated from the gas through the exhaust oil separator, which further improves the oil-gas separation effect. It can also prevent the gas from accumulating in the return oil pipe, ensuring that the lubricating oil recovered in the return oil pipe will not be re-atomized by the high temperature and high pressure gas, thereby further improving the return oil efficiency.

[0025] This embodiment also provides a compressor, which includes the oil-gas separation cylinder described above. Since the oil-gas separation cylinder described above can increase the contact surface between the lubricating oil in the oil and gas and the inner wall of the cylinder body by adding an auxiliary exhaust channel, the oil return efficiency can be improved. This allows the compressor to reduce the loss of lubricating oil and reduce the wear of moving parts inside the compressor, thereby effectively ensuring the safety and stability of the compressor during use. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of the oil-gas separation cylinder provided by this utility model;

[0027] Figure 2 This is an exploded view of the structure of the oil-gas separation cylinder provided by this utility model;

[0028] Figure 3 This is a top view of the oil-gas separation cylinder provided by this utility model;

[0029] Figure 4 It is along Figure 3 Sectional view at point AA;

[0030] Figure 5 It is along Figure 3 Sectional view at point BB;

[0031] Figure 6 This is a schematic diagram of the internal structure of the cylinder head provided by this utility model.

[0032] In the picture:

[0033] 1. Cylinder body; 101. Main exhaust passage; 1021. First flow channel; 1022. Second flow channel; 103. Main exhaust port; 104. Secondary exhaust port; 105. Oil return port; 106. Oil return pipe; 1061. First oil return groove; 1062. Second oil return groove; 107. Gas return passage; 11. Cylinder head; 111. Exhaust groove; 112. Exhaust pipe; 113. Gas return pipe; 114. Weight reduction groove; 12. Stabilizing plate; 121. Vent hole; 122. Return hole; 13. Elastic buffer plate; 131. Exhaust valve plate; 132. Limiting plate; 14. Oil return filter pipe; 2. Oil separator components. Detailed Implementation

[0034] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0035] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0036] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0037] In the description of this embodiment, the terms "upper," "lower," "right," and "left," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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 this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0038] Currently, the moving parts inside compressors operate under high stress and must function in a well-lubricated environment. However, when the compressor compresses and discharges gas, the high-temperature, high-pressure gas inevitably carries a small amount of lubricating oil with it. To reduce the amount of lubricating oil carried by the compressed gas, some compressors incorporate an oil-gas separation structure. Existing compressor oil-gas separation structures create a vortex by tangentially positioning the exhaust port and exhaust pipe. After passing through the exhaust oil separator, the oil flows back along the exhaust pipe wall to the return oil pipe. However, the separation effect of existing compressor oil-gas separation structures is not ideal, as the oil is still atomized and discharged by the airflow, resulting in a reduced amount of returned oil. Based on the shortcomings of existing technologies, this utility model provides the following technical solution to address the defect of reduced returned oil volume in existing technologies.

[0039] The technical solution provided by this utility model will be described below with reference to the accompanying drawings and specific embodiments.

[0040] In the following figures provided by this utility model, Figure 1 This is a schematic diagram of the structure of the oil-gas separation cylinder provided by this utility model; Figure 2 This is an exploded view of the structure of the oil-gas separation cylinder provided by this utility model;

[0041] Figure 3 This is a top view of the oil-gas separation cylinder provided by this utility model; Figure 4 It is along Figure 3 Sectional view at point AA; Figure 5 It is along Figure 3 Sectional view at point BB; Figure 6 This is a schematic diagram of the internal structure of the cylinder head provided by this utility model.

[0042] Combination Figures 1 to 6As shown, this embodiment provides an oil-gas separator type cylinder, which includes a cylinder body 1 and an oil separator component 2. The cylinder body 1 has a cavity structure and includes a main exhaust passage 101, a secondary exhaust passage, a main exhaust port 103, a secondary exhaust port 104, an oil return port 105, an oil return pipe 106, and a gas return passage 107. The top of the main exhaust passage 101 is connected to the main exhaust port 103, and the bottom of the main exhaust passage 101 is connected to the oil return pipe 106 via the oil return port 105. The secondary exhaust passage is located on one side of the main exhaust passage 101, with its top connected to the secondary exhaust port 104 and its bottom connected to the oil return pipe 106. The gas return passage 107 is located on one side of the main exhaust passage 101, with one end connected to the oil return pipe 106 and the other end connected to the main exhaust passage 101. The oil separator 2 is fixedly installed in the main exhaust channel 101 and is used to separate the oil and gas entering the main exhaust channel 101.

[0043] In practical use, a portion of the high-temperature, high-pressure oil and gas can enter the main exhaust passage 101 through the main exhaust port 103. Since the main exhaust port 103 is tangent to the main exhaust passage 101, the oil and gas can form a vortex after entering the main exhaust passage 101, and then collide with the exhaust oil separator, thereby achieving oil-gas separation. The separated lubricating oil can flow along the inner wall of the main exhaust pipe 112 to the return oil port 105, and then be deposited in the return oil pipe 106 through the return oil port 105, thus completing the oil return action. The separated gas can be discharged from the cylinder body 1 through the exhaust oil separator. In addition, another part of the high-temperature and high-pressure oil and gas can enter the secondary exhaust passage through the secondary exhaust port 104 and flow along the secondary exhaust passage to the return oil pipe 106. When the oil and gas flow along this path, the lubricating oil can directly adhere to the inner wall of the secondary exhaust passage. Since the bottom of the secondary exhaust passage is connected to the return oil pipe 106, the lubricating oil can flow along the inner wall of the secondary exhaust passage to the return oil pipe 106 by gravity, completing the return oil action. The separated gas can be recirculated into the main exhaust passage 101 through the return gas passage 107 and discharged from the cylinder body 1 after further processing by the exhaust oil separator.

[0044] Through the above configuration, the exhaust path can be effectively extended under the action of the auxiliary exhaust channel, increasing the surface area of ​​contact between the oil and gas and the cylinder body 1 wall, thereby increasing the probability of lubricating oil adhering to the cylinder body 1. In addition, the return gas channel 107 can guide the gas in the auxiliary exhaust channel back into the main exhaust channel 101 for processing, allowing the residual lubricating oil in the gas to be separated from the gas through the exhaust oil separator, further improving the oil-gas separation effect. Moreover, it can also prevent the gas from accumulating in the return oil pipe 106, ensuring that the lubricating oil recovered in the return oil pipe 106 will not be re-atomized by the high-temperature and high-pressure gas, thereby further improving the return oil efficiency.

[0045] refer to Figures 2 to 5 As shown, in a specific embodiment, the cylinder body 1 includes a cylinder head 11. An exhaust groove 111 is recessed on the cylinder head 11, serving to receive oil and gas and contain high-temperature, high-pressure oil and gas. An exhaust pipe 112 is arranged within the exhaust groove 111 along the direction of gravity. The exhaust pipe 112 has a main exhaust passage 101 connected to the external environment, and a main exhaust port 103 is opened on the side wall of the exhaust pipe 112. The exhaust groove 111 connects to the main exhaust port 103. The bottom of 111 is provided with an oil return hole 105. The oil separator 2 is fixedly installed in the exhaust pipe 112. The auxiliary exhaust channel is located on one side of the exhaust groove 111, and the auxiliary exhaust channel and the exhaust groove 111 are connected through the auxiliary exhaust hole 104. After the oil and gas enter the oil and gas groove, two streams can be formed. One stream enters the main exhaust channel 101 through the main exhaust hole 103, and the other enters the auxiliary exhaust channel through the auxiliary exhaust hole 104, thereby achieving the purpose of separating the oil and gas into two streams for gas-liquid separation.

[0046] Furthermore, one specific embodiment is as follows, referring to Figure 2 As shown, the cylinder body 1 also includes a stationary plate 12, which can be sealed and fastened to the cylinder head 11 to ensure that the oil and gas that have not been separated inside the cylinder body 1 will not leak outward.

[0047] In another specific embodiment, the cylinder head 11 has a first flow groove 1021 recessed on the end face facing the stationary plate 12, and the first flow groove 1021 is connected to the auxiliary exhaust port 104; the stationary plate 12 has a second flow groove 1022 recessed on the end face facing the cylinder head 11. When the stationary plate 12 and the cylinder head 11 are fastened together, the first flow groove 1021 and the second flow groove 1022 cooperate to form the above-mentioned auxiliary exhaust passage, and the top of the second flow groove 1022 is connected to the first flow groove 1021, and the bottom of the second flow groove 1022 is connected to the return oil pipe 106. With the above configuration, some oil and gas can first enter the first flow groove 1021 on the cylinder head 11 through the auxiliary exhaust port 104, and then enter the second flow groove 1022 through the first flow groove 1021. This allows the lubricating oil in the oil and gas to directly adhere to the second flow groove 1022 on the stationary plate 12 and flow to the return oil pipe 106 along the direction of gravity. This not only improves the flow path of the oil and gas and makes the flow of the oil and gas smoother, but also avoids the local accumulation or retention of lubricating oil in the first flow groove 1021, thereby helping to reduce the design difficulty and structural complexity of the cylinder head 11.

[0048] In one specific embodiment, the cylinder head 11 has a first oil return groove 1061 recessed on the end face of the stationary plate 12. The top wall of the first oil return groove 1061 is connected to the oil return hole 105 and the gas return passage 107. The stationary plate 12 has a second oil return groove 1062 recessed on the end face of the cylinder head 11. A return hole 122 is provided between the second oil return groove 1062 and the second flow groove 1022. When the stationary plate 12 and the cylinder head 11 are fastened together, the first oil return groove 1061 and the second oil return groove 1062 can cooperate to form the aforementioned oil return pipe 106, and the second oil return groove 1062 is connected to the second flow groove 1022 through the return hole 122.

[0049] In the above configuration, by opening a first oil return groove 1061 and a second oil return groove 1062 on the cylinder head 11 and stationary plate 12 respectively, the lubricating oil flowing out of the main exhaust passage 101 can flow into the first oil return groove 1061 through the oil return hole 105, and the lubricating oil flowing out of the auxiliary exhaust passage can flow into the second oil return groove 1062 through the oil return hole 105. It should be noted that an oil return filter pipe 14 is also provided below the oil return pipe 106. The oil return filter pipe 14 is connected to the oil return pipe 106, allowing the lubricating oil in the first oil return groove 1061 and the second oil return groove 1062 to directly collect in the oil return filter pipe 14 and flow back to the components located further down in the compressor, aiding in lubrication. In addition, the gas in the secondary exhaust passage can be circulated back into the main exhaust passage 101 through the second return oil groove 1062, the first return oil groove 1061, and the return gas passage 107 in sequence, thereby ensuring that no gas remains in the second flow groove 1022 and the secondary exhaust passage, reducing the risk of the lubricating oil in the return oil pipe 106 being atomized again.

[0050] Optionally, in a specific embodiment, a return air pipe 113 is provided between the first return oil tank 1061 and the exhaust pipe 112, and the return air pipe 113 is provided with the aforementioned return air passage 107.

[0051] Optionally, refer to Figure 2 , Figure 4 As shown, the cylinder body 1 also includes an elastic buffer plate 13. The elastic buffer plate 13 is sealed on the vent hole 121. When high-temperature and high-pressure oil and gas pass through the vent hole 121, the oil and gas can push the elastic buffer plate 13 open so that the vent hole 121 is connected to the exhaust groove 111, so that the oil and gas can flow to the main exhaust hole 103 and the auxiliary exhaust hole 104 through the exhaust groove 111 respectively.

[0052] In a preferred embodiment of this application, the elastic buffer plate 13 includes an exhaust valve plate 131 and a limiting plate 132. The exhaust valve plate 131 is fitted and covered on the vent hole 121. The high-temperature and high-pressure gas discharged from the vent hole 121 can push open the exhaust valve plate 131 and flow into the exhaust groove 111. The high-temperature and high-pressure gas is slowed down by the obstruction of the exhaust valve plate 131 and will not directly impact the exhaust groove 111, making the oil and gas entering the main exhaust channel 101 and the auxiliary exhaust channel smoother, effectively reducing airflow pulsation and noise, thereby improving the oil and gas separation effect. Moreover, the exhaust valve plate 131 used in this application embodiment is made of high-hardness, high-strength and high-toughness alloy steel sheet, so that after the high-temperature and high-pressure gas passes through the exhaust valve plate 131, the exhaust valve plate 131 can return to its initial shape and tightly seal the vent hole 121 again, thereby also preventing the backflow of high-pressure gas. The limiting plate 132 is curved in shape. One end of the limiting plate 132 is spaced apart from the exhaust valve plate 131 to form a limiting space between them, which can limit the degree of elastic deformation of the exhaust valve plate 131.

[0053] refer to Figure 6 As shown, in one specific embodiment, at least two annular grooves are recessed on the end face of the cylinder head 11 facing the stationary plate 12, about the axial direction of the cylinder head 11. These at least two annular grooves together enclose and form the aforementioned exhaust groove 111 at its center. An exhaust pipe 112 passes through the exhaust groove 111 and the annular grooves, allowing a portion of the exhaust pipe 112 to protrude from the cylinder head 11, thereby ensuring that the main exhaust passage 101 can be connected to the external environment, allowing gas to be directly discharged to the external environment. Furthermore, in the at least two annular grooves, one annular groove defines the aforementioned first flow groove 1021, and the remaining at least one annular groove defines a weight reduction groove 114.

[0054] The weight reduction groove 114 can effectively reduce the weight of the cylinder head 11. Moreover, through the above-mentioned arrangement, the layout of the exhaust groove 111, the main exhaust passage 101 and the auxiliary exhaust passage is optimized, making the connection between the three more compact and reducing the waste of internal space of the cylinder head 11. In addition, in order to ensure the sealing of the auxiliary exhaust passage, the second flow groove 1022 is designed to match the shape of the first flow groove 1021, and is annular. Furthermore, the inner wall of the annular second flow groove 1022 is curved, which increases the surface area of ​​the inner wall of the second flow groove 1022, thereby allowing the lubricating oil to better adhere to the inner wall of the second flow groove 1022.

[0055] In some specific embodiments, with a vertical plane passing through the axis of the cylinder head 11 as the center, two annular grooves are provided on each side of the vertical plane. The two annular grooves on one side of the vertical plane define the aforementioned weight-reducing groove 114, and the two annular grooves on the other side of the vertical plane define the first flow groove 1021 and the weight-reducing groove 114, respectively. The height of the first flow groove 1021 is higher than that of the weight-reducing groove 114, so that at least three weight-reducing grooves 114 are provided on the cylinder head 11, further reducing the weight of the cylinder head 11, making it easier to disassemble, assemble and transport. At the same time, it can ensure that the height of the main exhaust port 103 and the first flow groove 1021 is relatively high, so that the second flow groove 1022 has sufficient inner wall length for the adhesion of lubricating oil, thereby ensuring a high lubricating oil recovery rate.

[0056] For example, in this embodiment, six annular grooves are provided, one at the top and one at the bottom of the cylinder head 11. The annular groove at the bottom of the cylinder head 11 defines the aforementioned first oil return groove 1061, and the annular groove at the top of the cylinder head 11 defines the weight reduction groove 114. It can be understood that in this embodiment, in the annular grooves on both sides of the weight reduction groove 114 at the top, one annular groove defines the aforementioned first return groove, and the other annular groove defines the weight reduction groove 114. The two annular grooves close to the first oil return groove 1061 both define the weight reduction groove 114, making the cylinder head 11 provided in this embodiment simple in structure, easy to manufacture, and with lower weight, further improving safety and reliability in use.

[0057] This embodiment also provides a compressor, specifically a compressor, which includes the oil-gas separation cylinder described above. The oil-gas separation cylinder includes a cylinder body and an oil separator. The cylinder body has a cavity structure and includes a main exhaust passage, a secondary exhaust passage, a main exhaust port, a secondary exhaust port, an oil return port, an oil return pipe, and a gas return passage. The top of the main exhaust passage is connected to the main exhaust port, and the bottom of the main exhaust passage is connected to the oil return pipe via the oil return port. The secondary exhaust passage is located on one side of the main exhaust passage, with its top connected to the secondary exhaust port and its bottom connected to the oil return pipe. The gas return passage is located on one side of the main exhaust passage, with one end connected to the oil return pipe and the other end connected to the main exhaust passage. The oil separator is fixedly installed inside the main exhaust passage and is used to separate the oil and gas entering the main exhaust passage.

[0058] By installing the aforementioned oil-gas separation cylinder in the compressor, the oil-gas separation cylinder can improve oil return efficiency by increasing the contact area between the lubricating oil in the oil and the inner wall of the cylinder body 1 through the addition of an auxiliary exhaust channel. This allows the compressor to reduce lubricating oil consumption and reduce wear on the moving parts inside the compressor, thereby effectively ensuring the safety and stability of the compressor during use.

[0059] In the description of this specification, references to terms such as "some embodiments," "other embodiments," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is 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.

[0060] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. An oil-gas separation type cylinder, characterized in that, include: The cylinder body (1) has a cavity structure and includes a main exhaust passage (101), a secondary exhaust passage, a main exhaust port (103), a secondary exhaust port (104), an oil return port (105), an oil return pipe (106), and a gas return passage (107). The top of the main exhaust passage (101) is connected to the main exhaust port (103), and the bottom of the main exhaust passage (101) is connected to the oil return pipe (106) via the oil return port (105). The auxiliary exhaust passage is located on one side of the main exhaust passage (101). The top of the auxiliary exhaust passage is connected to the auxiliary exhaust port (104), and the bottom of the auxiliary exhaust passage is connected to the oil return pipe (106). The return gas passage (107) is located on one side of the main exhaust passage (101), and one end of the return gas passage (107) is connected to the oil return pipe (106), and the other end of the return gas passage (107) is connected to the main exhaust passage (101). Oil separator (2) is fixedly installed in the main exhaust channel (101) and is used to separate oil and gas entering the main exhaust channel (101).

2. The oil-gas separation cylinder according to claim 1, characterized in that, The cylinder body (1) includes a cylinder head (11), on which an exhaust groove (111) is recessed. The exhaust groove (111) is used to receive the oil and gas. An exhaust pipe (112) is arranged in the exhaust groove (111) along the direction of gravity. The exhaust pipe (112) has a main exhaust channel (101) connected to the external environment. The side wall of the exhaust pipe (112) is provided with the main exhaust hole (103). The exhaust groove (111) is connected to the main exhaust hole (103). The bottom of the exhaust groove (111) is provided with the oil return hole (105). The oil separator (2) is fixed in the exhaust pipe (112). The auxiliary exhaust channel is located on one side of the exhaust groove (111). The auxiliary exhaust channel and the exhaust groove (111) are connected through the auxiliary exhaust hole (104).

3. The oil-gas separation cylinder according to claim 2, characterized in that, The cylinder body (1) also includes a stationary plate (12), which is sealed and fastened to the cylinder head (11). The cylinder head (11) has an exhaust groove (111) on the end face facing the stationary plate (12). A vent hole (121) is provided in the stationary plate (12), which is used to discharge the oil and gas into the exhaust groove (111).

4. The oil-gas separation cylinder according to claim 3, characterized in that, The cylinder head (11) has a first flow groove (1021) recessed on the end face facing the stationary plate (12), and the first flow groove (1021) is connected to the auxiliary exhaust port (104). The stationary disc (12) has a second flow groove (1022) recessed on the end face facing the cylinder head (11). When the stationary disc (12) is fastened to the cylinder head (11), the first flow groove (1021) and the second flow groove (1022) cooperate to form the auxiliary exhaust channel. The top of the second flow groove (1022) is connected to the first flow groove (1021), and the bottom of the second flow groove (1022) is connected to the return oil pipe (106).

5. The oil-gas separation cylinder according to claim 4, characterized in that, The cylinder head (11) is recessed on the end face facing the stationary plate (12) and a first oil return groove (1061) is provided. The top wall of the first oil return groove (1061) is connected to the oil return hole (105) and the gas return passage (107). The stationary disc (12) has a second oil return groove (1062) recessed on the end face facing the cylinder head (11). A return hole (122) is provided between the second oil return groove (1062) and the second flow groove (1022). When the stationary disc (12) is fastened to the cylinder head (11), the first oil return groove (1061) and the second oil return groove (1062) cooperate to form the oil return pipe (106). The second oil return groove (1062) is connected to the second flow groove (1022) through the return hole (122).

6. The oil-gas separation cylinder according to claim 5, characterized in that, Around the axis of the cylinder head (11), at least two annular grooves are recessed on the end face of the cylinder head (11) facing the stationary plate (12). The at least two annular grooves surround the exhaust groove (111). The exhaust pipe (112) passes through the exhaust groove (111) and the annular grooves. One of the annular grooves defines the first flow groove (1021), and the remaining at least one annular groove defines the weight reduction groove (114).

7. The oil-gas separation cylinder according to claim 6, characterized in that, Centered on a vertical plane passing through the axis of the cylinder head (11), two annular grooves are provided on each side of the vertical plane. The two annular grooves on one side of the vertical plane define the weight reduction groove (114), and the two annular grooves on the other side of the vertical plane define the first flow groove (1021) and the weight reduction groove (114), respectively. The height of the first flow groove (1021) is higher than that of the weight reduction groove (114).

8. The oil-gas separation cylinder according to claim 7, characterized in that, The annular groove is provided in six parts. The cylinder head (11) is provided with one annular groove at the top and one at the bottom. The annular groove at the bottom of the cylinder head (11) defines the first oil return groove (1061), and the annular groove at the top of the cylinder head (11) defines the weight reduction groove (114).

9. The oil-gas separation cylinder according to claim 3, characterized in that, The cylinder body (1) also includes an elastic buffer plate (13), which is sealed on the vent hole (121). When the oil and gas pass through the vent hole (121), the elastic buffer plate (13) can spring open to connect the vent hole (121) with the exhaust groove (111).

10. A compressor, characterized in that, The oil-gas separation cylinder includes any one of claims 1-9.

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