Scroll compressor and air conditioner

Abstract

The application discloses a scroll compressor and an air conditioner, and relates to the technical field of scroll compressors, and specifically discloses a scroll compressor comprising an exhaust cover assembly and a static scroll disc assembly, wherein the exhaust cover assembly comprises an exhaust cover provided with a first oil return channel; the static scroll disc assembly comprises a static disc, an exhaust valve plate and a valve plate fixing member, the static disc is provided with a second oil return channel, the static disc is fixedly installed with the exhaust cover, and the exhaust valve plate is fixed on the static disc through the valve plate fixing member; wherein an oil return part is formed on the valve plate fixing member and is in communication with the first oil return channel and the second oil return channel respectively. According to the application, the lubricating oil in the exhaust cover can flow back into the back pressure cavity through the first oil return channel, the oil return part and the second oil return channel in sequence to provide lubrication, the oil return is realized through the oil return part on the valve plate fixing member, the inclined hole is not formed on the static disc, the structure of the static disc is simpler, the processing difficulty of the static disc is reduced, and the processing cost is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of compressor processing, in particular to a scroll compressor and an air conditioner. BACKGROUND

[0002] Compared with other types of compressors, scroll compressors have the advantages of high energy efficiency, low noise and high reliability. Air conditioning systems are increasingly choosing scroll compressors as their core power elements, and even in some special application fields such as vehicles, fighter jets, aerospace, etc. Scroll compressors are also used, and the reliability of scroll compressors is crucial. In order to reduce the wear of moving parts in the scroll compressor, the end cover and the static scroll plate of the current scroll compressor are usually provided with an oil return channel, and the lubricating oil is introduced into the back pressure cavity through the oil return channel to lubricate the bearing. However, due to the need for mutual isolation of the back surface of the static scroll plate and the oil return hole, and the static scroll plate and the end cover oil return communication hole are generally inclined holes, which causes the structure of the back surface of the static scroll plate to be complex, and the processing difficulty of the static scroll plate is large. SUMMARY

[0003] Embodiments of the present application provide a scroll compressor and an air conditioner, aiming to solve the problem of complex structure and large processing difficulty of the static scroll plate of the existing scroll compressor.

[0004] The present application provides a scroll compressor, comprising:

[0005] An exhaust cover assembly comprising an exhaust cover, the exhaust cover being provided with a first oil return channel;

[0006] A static scroll plate assembly comprising a static plate, an exhaust valve plate and a valve plate fixing member, the static plate being provided with a second oil return channel, the static plate being fixedly installed with the exhaust cover, and the exhaust valve plate being fixed on the static plate through the valve plate fixing member;

[0007] Wherein, the valve plate fixing member is provided with an oil return part, and the oil return part is in communication with the first oil return channel and the second oil return channel respectively.

[0008] In the scroll compressor provided by the present application, one end of the valve plate fixing member abuts against the exhaust cover, and the other end of the valve plate fixing member is fixed on the static plate through the exhaust valve plate, and the oil return part is formed by penetrating the valve plate fixing member from one end to the other end along the axial direction of the static plate.

[0009] In the scroll compressor provided by the application, the static plate comprises a first end face close to the exhaust cover and a second end face away from the exhaust cover, the second oil return channel comprises a first oil return section, a second oil return section and a third oil return section, the first oil return section is opened along the axial direction of the static plate by the first end face, the second oil return section is opened along the radial direction of the static plate by the side wall of the static plate and communicates with the first oil return section, the third oil return section is opened along the axial direction of the static plate by the second end face and communicates with the second oil return section, the valve plate fixing member is fixed in the first oil return section and the oil return part communicates with the first oil return section.

[0010] In the scroll compressor provided by the application, the static scroll plate assembly further comprises a sealing plug, one end of the second oil return section close to the side wall of the static plate is provided with a plug hole, and the sealing plug seals the plug hole.

[0011] In the scroll compressor provided by the application, the static scroll plate assembly further comprises a circular first sealing ring, a circular first sealing groove is opened on the first end face around the exhaust valve plate, and the first sealing ring is arranged on the first sealing groove.

[0012] In the scroll compressor provided by the application, one of the end face of the exhaust cover close to the static plate and the end face of the valve plate fixing member close to the exhaust cover is provided with a limiting boss, and the other is provided with a rotation stopping groove, and the limiting boss is arranged in the rotation stopping groove.

[0013] In the scroll compressor provided by the application, the exhaust cover is further provided with an oil storage cavity opened along the radial direction thereof, one end of the oil storage cavity penetrates the side wall of the exhaust cover in the radial direction to form an exhaust port, one end of the first oil return channel communicates with the end of the oil storage cavity away from the exhaust port, the other end of the first oil return channel penetrates the limiting boss, and one end of the oil return part close to the first oil return channel penetrates the rotation stopping groove.

[0014] In the scroll compressor provided by the application, the static scroll plate assembly further comprises a second sealing ring, a second sealing groove is opened on the end face of the valve plate fixing member close to the exhaust cover, the second sealing groove is opened around the rotation stopping groove, and the second sealing ring is arranged on the second sealing groove.

[0015] In the scroll compressor provided by the application, the exhaust cover assembly comprises a cyclone separator, the cyclone separator is arranged in the oil storage cavity, one side of the exhaust cover close to the static plate is provided with an exhaust inlet, the exhaust inlet penetrates the oil storage cavity along the axial direction of the exhaust cover and faces the cyclone separator.

[0016] In the scroll compressor provided by the present invention, the scroll compressor further includes a moving scroll disk assembly and a support assembly. The moving scroll disk assembly includes a moving disk that meshes with a stationary disk. The support assembly includes a support and a wear-resistant plate. A back pressure cavity is formed between the support and the moving disk. The wear-resistant plate is disposed on the end face of the support near the stationary disk and the moving disk. The wear-resistant plate is provided with a third oil return channel, which communicates with a second oil return channel. The support is provided with a fourth oil return channel, the two ends of which are respectively connected to the third oil return channel and the back pressure cavity.

[0017] In the scroll compressor provided by the present invention, the third oil return channel is an arc-shaped groove extending along the edge of the wear-resistant plate, one end of the arc-shaped groove is connected to the second oil return channel, and the other end of the arc-shaped groove is connected to the fourth oil return channel.

[0018] In the scroll compressor provided by the present invention, the fourth oil return channel includes a support oil return hole and a support oil return section. The support oil return hole is opened on the end face of the support near the wear-resistant plate. The support oil return hole is connected to the other end of the arc groove. One end of the support oil return section is connected to the support oil return hole, and the other end of the support oil return section passes through the side wall of the support adjacent to the back pressure chamber to communicate with the back pressure chamber.

[0019] The present invention also provides an air conditioner including the scroll compressor described above.

[0020] This invention provides a scroll compressor and an air conditioner. The scroll compressor includes an exhaust cover assembly and a stationary scroll assembly. The exhaust cover assembly includes an exhaust cover with a first oil return channel. The stationary scroll assembly includes a stationary disk, an exhaust valve plate, and a valve plate fixing member. The exhaust cover is mounted on the stationary disk, and the stationary disk has a second oil return channel. The exhaust valve plate is fixed to the stationary disk by the valve plate fixing member. An oil return section is formed on the valve plate fixing member. The two ends of the oil return section are respectively connected to the first oil return channel on the exhaust cover and the second oil return channel on the stationary disk, so that the lubricating oil in the exhaust cover can flow back to the back pressure chamber in sequence through the first oil return channel, the oil return section, and the second oil return channel to provide lubrication. Since the first oil return channel and the second oil return channel are connected through the oil return section on the valve plate fixing member, it is not necessary to form an oblique hole on the stationary disk as an oil return channel. Instead, the oil return is achieved through the oil return section on the valve plate fixing member, which simplifies the structure of the stationary disk, reduces the processing difficulty of the stationary disk, and reduces the processing cost. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 A cross-sectional schematic diagram of a scroll compressor according to an embodiment of the present invention is shown;

[0023] Figure 2 Showing Figure 1 Enlarged view of part A;

[0024] Figure 3 A schematic diagram of the stationary disc of a scroll compressor according to an embodiment of the present invention is shown;

[0025] Figure 4 A schematic diagram of the stationary scroll plate assembly of a scroll compressor according to an embodiment of the present invention is shown;

[0026] Figure 5 A schematic diagram of the exhaust cover assembly of a scroll compressor according to an embodiment of the present invention is shown;

[0027] Figure 6 Showing Figure 5 Enlarged view of part B;

[0028] Figure 7 A half-sectional schematic diagram of a scroll compressor according to an embodiment of the present invention is shown;

[0029] Figure 8 Showing Figure 7 Enlarged view of part C;

[0030] Figure 9 Showing Figure 7 Enlarged view of part D;

[0031] Figure 10 A schematic diagram of the support frame for a scroll compressor according to an embodiment of the present invention is shown;

[0032] illustrate:

[0033] 1. Exhaust cover assembly; 11. Exhaust cover; 111. First oil return channel; 112. Limiting boss; 113. Oil storage chamber; 114. Exhaust port; 115. Exhaust inlet; 12. Cyclone separator; 2. Static vortex disk assembly; 21. Static disk; 211. Second oil return channel; 2111. First oil return section; 2112. Second oil return section; 2113. Third oil return section; 212. First sealing groove; 22. Exhaust valve plate; 23. Valve plate fixing component; 231. 1. Oil return section; 232. Anti-rotation groove; 233. Second sealing groove; 24. Sealing plug; 25. First sealing ring; 26. Second sealing ring; 27. Plug hole; 3. Moving scroll plate assembly; 31. Moving plate; 32. Bearing; 33. Back pressure chamber; 4. Support assembly; 41. Wear-resistant plate; 411. Third oil return channel; 42. Support; 421. Fourth oil return channel; 4211. Support oil return hole; 4212. Support oil return section; 5. Housing; 51. Air inlet. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] The directional terms used in this invention, such as "up," "down," "front," "back," "left," "right," "inner," "outer," and "side," are merely for reference to the accompanying drawings. Therefore, the directional terms used are for illustrating and understanding this invention, and not for limiting it. Furthermore, in the drawings, structures that are similar or identical are indicated by the same reference numerals.

[0036] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying 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 this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0037] Reference Figures 1-10This invention provides a scroll compressor, comprising: an exhaust cover assembly 1 and a stationary scroll assembly 2. The exhaust cover assembly 1 includes an exhaust cover 11, which has a first oil return channel 111. The stationary scroll assembly 2 includes a stationary disk 21, an exhaust valve plate 22, and a valve plate fixing member 23. The stationary disk 21 has a second oil return channel 211. The stationary disk 21 is fixedly installed with the exhaust cover 11. The exhaust valve plate 22 is fixed on the stationary disk 21 by the valve plate fixing member 23. The valve plate fixing member 23 has an oil return portion 231, which communicates with the first oil return channel 111 and the second oil return channel 211 respectively.

[0038] Reference Figure 1 Specifically, the scroll compressor in this embodiment mainly consists of a housing 5, an exhaust cover assembly 1, a stationary scroll assembly 2, a moving scroll assembly 3, and a support assembly 4. The exhaust cover assembly 1 is located on the top of the housing 5, while the stationary scroll assembly 2, the moving scroll assembly 3, and the support assembly 4 are located inside the housing 5. The exhaust cover assembly 1 includes an exhaust cover 11, the stationary scroll assembly 2 includes a stationary disk 21, the moving scroll includes a moving disk 31 and a bearing 32, and the support assembly 4 includes a support 42. The exhaust cover 11 is fixedly installed with the stationary disk 21, the moving disk 31 meshes with the stationary disk 21, the bearing 32 supports the moving disk 31, and a back pressure cavity 33 is formed between the support 42 and the moving disk 31, with the bearing 32 located in the back pressure cavity 33. When the scroll compressor is working, external refrigerant enters the interior of the scroll compressor through the system piping from the inlet 51 of the casing 5. It is then drawn into the scroll compressor and enters the compression chamber formed by the meshing of the moving disc 31 and the stationary disc 21. The low-temperature, low-pressure refrigerant gas is compressed into a high-temperature, high-pressure refrigerant gas, which is then discharged from the stationary disc 21 as compressed exhaust gas. This compressed exhaust gas consists of refrigerant gas carrying lubricating oil. When the exhaust valve 22 on the stationary disc 21 opens, the compressed exhaust gas is discharged into the exhaust cover 11. After oil-gas separation in the exhaust cover 11, the gas is discharged from the exhaust port 114 on the exhaust cover 11, and the lubricating oil flows back to the back pressure chamber 33 through the oil passage to provide lubrication for the bearing 32.

[0039] Specifically, the exhaust cover 11 is fixedly installed along the axial direction of the scroll compressor and the stationary plate 21. The stationary plate 21 includes a first end face and a second end face facing away from each other. The first end face is close to the exhaust cover 11, and the second end face is away from the exhaust cover 11. A valve hole is provided on the first end face, and the exhaust valve plate 22 is fixed on the first end face by the valve plate fixing member 23. The exhaust valve plate 22 can open and close the valve hole. The oil circuit of this embodiment includes a first oil return channel 111 on the exhaust cover 11, an oil return part 231 on the valve plate fixing member 23, and a second oil return channel 211 on the stationary plate 21. The first oil return channel 111 on the exhaust cover 11 and the second oil return channel 211 on the stationary plate 21 can be of various shapes and structures, and are not limited here. When the exhaust cover 11 is installed on the stationary plate 21, the exhaust valve plate 22 and the valve plate fixing member 23 are located between the exhaust cover 11 and the stationary plate 21. Therefore, the valve plate fixing member 23 can serve as a bridge for lubricating oil from the exhaust cover 11 to the stationary plate 21. An oil return section 231 is provided on the valve plate fixing member 23. The oil return section 231 connects the first oil return channel 111 on the exhaust cover 11 and the second oil return channel 211 on the stationary plate 21, so that the lubricating oil can flow back from the first oil return channel 111 on the exhaust cover 11 through the oil return section 231 on the valve plate fixing member 23 to the second oil return channel 211 on the stationary plate 21, and finally flow back to the back pressure chamber 33, thereby achieving lubrication of the bearing 32.

[0040] In this embodiment, compared to the existing scroll compressors that open oblique holes on the stationary plate 21 to achieve oil return, the present invention opens an oil return section 231 on the valve plate fixing member 23 to connect the first oil return channel 111 on the exhaust cover 11 and the second oil return channel 211 on the stationary plate 21. This avoids opening oblique holes on the stationary plate 21, reduces the structural complexity of the stationary plate 21, makes the structure of the stationary plate 21 simpler, reduces the processing difficulty, and lowers the cost.

[0041] Reference Figure 1 and Figure 2In one embodiment, one end of the valve plate fixing member 23 abuts against the exhaust cover 11, and the other end passes through the exhaust valve plate 22 and is fixed to the stationary plate 21. The oil return portion 231 is formed by extending from one end of the valve plate fixing member 23 along the axial direction of the stationary plate 21 to the other end of the valve plate fixing member 23. Specifically, the valve plate fixing member 23 in this embodiment can be a bolt, and the oil return portion 231 is a straight hole that passes through the bolt along the axial direction of the bolt, extending axially from the head of the bolt to the tail of the bolt. The axial direction of the bolt is the same as the axial direction of the stationary plate 21. During installation, the tail of the bolt passes through the through hole on the exhaust valve plate 22 and is fixed with the threaded hole on the first end face of the stationary plate 21. The head of the bolt abuts against the end face of the exhaust cover 11 facing the stationary plate 21. The outlet of the first oil return channel 111 on the exhaust cover 11 is located on the end face of the exhaust cover 11 facing the stationary plate 21 and is aligned with the head of the bolt, while the tail of the bolt is aligned with the inlet of the second oil return channel 211 in the stationary plate 21. In this way, the lubricating oil in the vent cover 11 can flow straight along the axial direction of the bolt to the second oil return channel 211 of the stationary plate 21. The flow of lubricating oil is not bent, and the return efficiency is high.

[0042] Reference Figure 3In one embodiment, the stationary disc 21 includes a first end face near the exhaust cover 11 and a second end face away from the exhaust cover 11. The second oil return channel 211 includes a first oil return section 2111, a second oil return section 2112, and a third oil return section 2113. The first oil return section 2111 is opened from the first end face along the axial direction of the stationary disc 21. The second oil return section 2112 is opened from the side wall of the stationary disc 21 along the radial direction of the stationary disc 21 and communicates with the first oil return section 2111. The third oil return section 2113 is opened from the second end face along the axial direction of the stationary disc 21 and communicates with the second oil return section 2112. The valve plate fixing member 23 is fixed in the first oil return section 2111, and the oil return part 231 communicates with the first oil return section 2111. Specifically, the second oil return channel 211 includes three sections, namely the first oil return section 2111, the second oil return section 2112, and the third oil return section 2113, all of which are straight hole sections. The first oil return section 2111 is opened along the axial direction of the stationary plate 21, the second oil return section 2112 is opened along the radial direction of the stationary plate 21, and the third oil return section 2113 is opened along the axial direction of the stationary plate 21. Therefore, the first oil return section 2111 is perpendicular to the second oil return section 2112, the third oil return section 2113 is perpendicular to the second oil return section 2112, the first oil return section 2111 is parallel to the third oil return section 2113, and the third oil return section 2113 is connected to the back pressure chamber 33. The lubricating oil travels in a zigzag pattern in the second oil return channel 211. During machining, the first oil return section 2111 can be machined inward from the first end face of the stationary plate 21 along the axial direction of the stationary plate 21; the second oil return section 2112 can be machined inward from the side wall of the stationary plate 21 along the radial direction of the stationary plate 21 until it connects to the first oil return section 2111; the third oil return section 2113 can be machined inward from the second end face of the stationary plate 21 along the axial direction of the stationary plate 21 until it connects to the first oil return section 2111, with the machining direction of the third oil return section 2113 being opposite to that of the first oil return section 2111. In this way, the first oil return section 2111, the second oil return section 2112, and the third oil return section 2113 can achieve straight hole machining, which is easy to machine, simple in structure, and low in cost. Meanwhile, when machining the first oil return section 2111, internal threads can be machined in the first oil return section 2111, so that the bolt can be directly fixed into the first oil return section 2111. The lubricating oil flows directly from the tail of the bolt into the first oil return section 2111, which ensures high reliability of oil return and avoids oil leakage.

[0043] Reference Figure 4In this embodiment, the stationary scroll assembly 2 further includes a sealing plug 24. A plug hole 27 is provided at one end of the second oil return section 2112 near the side wall of the stationary disk 21, and the sealing plug 24 closes the plug hole 27. Specifically, since the second oil return section 2112 is machined radially inward from the side wall of the stationary disk 21, the outer end of the second oil return section 2112, i.e., the end near the side wall of the stationary disk 21, is exposed and therefore needs to be sealed to prevent lubricating oil leakage. Specifically, a threaded hole is machined at the outer end of the second oil return section 2112, and the thread of the sealing plug 24 engages with the thread of the plug hole 27. Simultaneously, thread sealant is applied to seal the second oil return section 2112, preventing oil leakage and improving sealing performance.

[0044] Continue to refer to Figure 4 In this embodiment, the stationary scroll assembly 2 further includes a circular first sealing ring 25. A circular first sealing groove 212 is formed around the exhaust valve plate 22 on the first end face, and the first sealing ring 25 is installed on the first sealing groove 212. Specifically, in existing scroll compressors, the back side of the stationary disk 21 must meet the requirements of high exhaust pressure while effectively isolating it from the oil return channel. The oil return connection hole between the stationary disk 21 and the end cover is usually designed as an oblique hole. This structural arrangement results in a complex geometry of the sealing area, causing the sealing groove on the back of the stationary disk 21 to be designed as an irregular shape. Traditional circular sealing rings, due to their circular cross-section and relatively simple installation requirements, are difficult to adapt to this complex sealing groove shape and cannot effectively seal and maintain sealing stability under high pressure and dynamic operating conditions. In this embodiment of the invention, the lubricating oil is returned from the exhaust cover 11 to the stationary plate 21 by utilizing the oil return section 231 on the valve plate fixing member 23. This allows the oil return path and the exhaust path to be integrated in the same location while achieving a sealed isolation. Consequently, the first sealing groove 212 on the first end face of the stationary plate 21 does not need to be designed as an irregular shape and can be designed as a circle. The circular first sealing groove 212 surrounds the exhaust valve plate 22, and the circular first sealing ring 25 can be installed on the circular first sealing groove 212 to achieve a seal. This embodiment allows the use of a circular first sealing ring 25, avoiding the need for designing irregularly shaped sealing rings, reducing design and manufacturing costs, and facilitating installation and replacement.

[0045] Reference Figure 4 , Figure 5 and Figure 6In one embodiment, a limiting boss 112 is provided on one of the end faces of the exhaust cover 11 near the stationary disc 21 and the end face of the valve plate fixing member 23 near the exhaust cover 11, and an anti-rotation groove 232 is provided on the other. The limiting boss 112 is disposed in the anti-rotation groove 232. Specifically, the limiting boss 112 is formed by protrusion on the end face of the exhaust cover 11 facing the stationary disc 21, and the anti-rotation groove 232 is formed by recess in the head of the bolt; or, the anti-rotation groove 232 is formed by recess in the end face of the exhaust cover 11 facing the stationary disc 21, and the limiting boss 112 is formed by protrusion in the head of the bolt. The shapes of the limiting boss 112 and the anti-rotation groove 232 are matched. The shapes of the limiting boss 112 and the anti-rotation groove 232 are not circular. For example, they can be polygons with edges such as rectangles, trapezoids, and hexagons, or ellipses and other curved irregular shapes, as long as they can achieve rotational constraint of the bolt. No limitation is made here. The limiting boss 112 is embedded in the anti-rotation groove 232. The limiting boss 112 and the anti-rotation groove 232 are in a small clearance fit, which can effectively constrain the rotation of the bolt, thereby realizing the function of preventing the bolt from loosening.

[0046] Continue to refer to Figure 1In a specific implementation, the exhaust cover 11 is further provided with an oil storage chamber 113 radially opened therein. One end of the oil storage chamber 113 radially penetrates the side wall of the exhaust cover 11 to form an exhaust port 114. One end of the first oil return channel 111 is connected to the end of the oil storage chamber 113 away from the exhaust port 114. The other end of the first oil return channel 111 penetrates the limiting boss 112. The end of the oil return part 231 near the first oil return channel 111 penetrates the anti-rotation groove 232. Specifically, the exhaust cover 11 is provided with an oil storage chamber 113. One end of the oil storage chamber 113 is provided with an exhaust port 114. The other end of the oil storage chamber 113 is provided with an inlet of the first oil return channel 111. The exhaust port 114 is on top, and the inlet of the first oil return channel 111 is on the bottom. After the compressed exhaust gas is separated into oil and gas in the oil storage chamber 113, the gas is discharged upward. The lubricating oil is stored at the bottom of the oil storage chamber 113 due to gravity and flows out from the first oil return channel 111 at the bottom. In this embodiment, a limiting boss 112 is disposed on the vent cover 11, and an anti-rotation groove 232 is disposed on the head of the bolt. The outlet of the first oil return channel 111 is located at the limiting boss 112, and the first oil return channel 111 penetrates the limiting boss 112. One end of the oil return portion 231 penetrates the anti-rotation groove 232 on the bolt head. The lubricating oil stored in the oil reservoir 113 first flows from the inlet of the first oil return channel 111 at the bottom of the oil reservoir 113 to the outlet of the first oil return channel 111 at the limiting boss 112. Since the limiting boss 112 is embedded in the anti-rotation groove 232, and the oil return portion 231 penetrates the anti-rotation groove 232, the lubricating oil flows from the limiting boss 112 into the anti-rotation groove 232 and then into the oil return portion 231. Through the structure of this embodiment, the lubricating oil flows from the limiting boss 112 and the anti-rotation groove 232, facilitating the sealing between the vent cover 11 and the bolt and improving the sealing performance.

[0047] Continue to refer to Figure 4 Furthermore, the static vortex assembly 2 also includes a second sealing ring 26. A second sealing groove 233 is formed on the end face of the valve plate fixing member 23 near the exhaust cover 11. The second sealing groove 233 surrounds the anti-rotation groove 232, and the second sealing ring 26 is mounted on the second sealing groove 233. Specifically, to further isolate the oil passage and exhaust, a second sealing groove 233 is formed on the end face of the bolt head. The second sealing groove 233 can be circular or other shapes, which are not limited here. The second sealing ring 26 can also be circular or other shapes, which are not limited here. The second sealing ring 26 is mounted on the second sealing groove 233 to achieve a seal between the bolt head and the end face of the exhaust cover 11. Under the action of back pressure, the second sealing ring 26 is pressed tightly against the end face of the exhaust cover 11, resulting in a good seal. Moreover, the second sealing ring 26 can be a circular sealing ring, which is easy to install and replace, and has low cost.

[0048] Continue to refer toFigure 1 In this embodiment, the exhaust cover assembly 1 includes a cyclone separator 12, which is disposed in the oil storage chamber 113. The exhaust cover 11 has an exhaust inlet 115 on the side near the stationary plate 21. The exhaust inlet 115 extends through the oil storage chamber 113 along the axial direction of the exhaust cover 11 and faces the cyclone separator 12. Specifically, the exhaust inlet 115 is provided on the end face of the exhaust cover 11 facing the stationary plate 21. The exhaust inlet 115 extends into the oil storage chamber 113, is opened along the axial direction of the exhaust cover 11, and is positioned opposite to the cyclone separator 12. The compressed exhaust gas exiting from the exhaust valve plate 22 passes tangentially through the cyclone separator 12. Under the action of centrifugal force, the denser lubricating oil is subjected to a greater centrifugal force and is thrown towards the outer wall of the cyclone separator 12. During this process, the micro-droplets of lubricating oil gradually converge into larger droplets, and then slide down the separator wall under the action of gravity to the bottom of the oil storage chamber 113 for collection. The gas, due to its lower density, rises along the oil storage chamber 113 and is discharged through the exhaust port 114 at the top of the oil storage chamber 113. In this way, oil-gas separation of the compressed exhaust gas is achieved.

[0049] Reference Figure 7 , Figure 8 and Figure 9In one embodiment, the scroll compressor further includes a moving scroll assembly 3 and a support assembly 4. The moving scroll assembly 3 includes a moving disk 31 that meshes with the stationary disk 21. The support assembly 4 includes a support 42 and a wear-resistant plate 41. A back pressure cavity 33 is formed between the support 42 and the moving disk 31. The wear-resistant plate 41 is disposed on the end face of the support 42 near the stationary disk 21 and the moving disk 31. The wear-resistant plate 41 has a third oil return channel 411 that communicates with the second oil return channel 211. The support 42 has a fourth oil return channel 421, with its two ends communicating with the third oil return channel 411 and the back pressure cavity 33, respectively. Specifically, the bearing 32 is located in the back pressure cavity 33 defined between the support 42 and the moving disk 31. Therefore, after the lubricating oil exits from the second oil return channel 211 of the stationary disk 21, it needs to pass through the support assembly 4 before entering the back pressure cavity 33. Specifically, the support assembly 4 includes a wear-resistant plate 41 and a support 42. The wear-resistant plate 41 is mounted on the end face of the support 42 facing the stationary disk 21. A third oil return channel 411 is formed on the wear-resistant plate 41, and a fourth oil return channel 421 is formed on the end face of the support 42 facing the stationary disk 21. The second oil return channel 211 on the stationary disk 21 is connected to the third oil return channel 411 on the wear-resistant plate 41, and the third oil return channel 411 on the wear-resistant plate 41 is connected to the fourth oil return channel 421 on the support 42. The fourth oil return channel 421 on the support 42 is then connected to the back pressure chamber 33, allowing lubricating oil to flow out from the second oil return channel 211 and then flow back into the back pressure chamber 33 through the third and fourth oil return channels 411 and 421 respectively. The structures of the third and fourth oil return channels 411 and 421 can be various and are not limited here.

[0050] Reference Figure 8 and Figure 9In this embodiment, the third oil return channel 411 is an arc-shaped groove extending along the edge of the wear-resistant plate 41. One end of the arc-shaped groove connects to the second oil return channel 211, and the other end connects to the fourth oil return channel 421. Specifically, the wear-resistant plate 41 mainly plays a wear-resistant role in the scroll compressor. The wear-resistant plate 41 is installed on the back of the moving disk 31 and directly contacts the moving disk 31. Since the moving disk 31 will generate high-speed rotation and translational motion during the operation of the compressor, the wear-resistant plate 41, as a protective layer, can reduce the direct friction between the moving scroll disk and the support 42, and extend the service life of the equipment. In this embodiment, the third oil return channel 411 is designed as an arc-shaped groove, which extends arc-shaped along the edge of the wear-resistant plate 41. One end of the arc-shaped groove connects to the third oil return section 2113 of the second oil return channel 211, and the other end connects to the fourth oil return section on the support 42. The arc-shaped groove design in this embodiment helps to distribute the returning lubricating oil more evenly on a larger contact surface, ensuring that the contact area between the moving disc 31 and the wear-resistant plate 41 is fully lubricated, reducing wear and extending the service life of the components.

[0051] Reference Figure 10 In this embodiment, the fourth oil return channel 421 includes an oil return hole and an oil return section of the bracket 42. The oil return hole of the bracket 42 is opened on the end face of the bracket 42 near the wear-resistant plate 41. The oil return hole of the bracket 42 communicates with the other end of the arc-shaped groove. One end of the oil return section of the bracket 42 communicates with the oil return hole of the bracket 42, and the other end of the oil return section of the bracket 42 passes through the side wall adjacent to the back pressure cavity 33 of the bracket 42 to communicate with the back pressure cavity 33. Specifically, since the bearing 32 is located at the shaft hole in the center of the bracket 42, and the outlet of the second oil return channel 211 on the stationary plate 21 is close to the edge of the stationary plate 21, the third oil return channel 411 needs to be guided from the edge to the center. Therefore, the fourth oil return channel 421 on the bracket 42 includes an oil return hole and an oil return section. The oil return hole is located on the edge of the end face of the bracket 42 facing the wear-resistant plate 41. The other end of the arc-shaped groove penetrates the axial end face of the wear-resistant plate 41. The lower part of the other end of the arc-shaped groove is the inlet of the oil return section of the bracket 42, allowing lubricating oil to flow downward from the other end of the arc-shaped groove into the oil return section of the bracket 42. The oil return section of the bracket 42 extends radially towards the shaft hole at the center of the bracket 42 until it penetrates the inner wall of the shaft hole of the bracket 42, so that the outlet of the oil return section of the bracket 42 is located in the shaft hole, that is, it enters the back pressure chamber 33. In this way, lubricating oil can flow from the other end of the arc-shaped groove into the oil return hole of the bracket 42, and after passing through the oil return section of the bracket 42, it flows back into the back pressure chamber 33, thereby achieving lubrication of the bearing 32. The design of the oil return hole and oil return section of bracket 42 allows the lubricating oil flowing out of the arc groove to flow back into the back pressure chamber 33. The structure is simple, the processing difficulty is low, and the cost is low.

[0052] To further illustrate the scroll compressor of this embodiment of the invention, the following description will focus on the flow direction of the compressed exhaust gas.

[0053] When the scroll compressor is working, external refrigerant enters the compressor through the inlet 51 of the housing 5 via the system pipeline, and is drawn into the compressor into the compression chamber formed by the meshing of the moving plate 31 and the stationary plate 21. The refrigerant gas is compressed from low temperature and low pressure into high temperature and high pressure. The compressed exhaust gas consists of refrigerant gas carrying lubricating oil. When the exhaust valve plate 22 is opened, the compressed exhaust gas flows out from the exhaust valve plate 22, and then flows tangentially from the exhaust inlet 115 of the exhaust cover 11 through the cyclone separator 12 in the oil storage chamber 113. Oil and gas are separated by the cyclone separator 12, and the gas flows out from the exhaust port 114 at the top of the oil storage chamber 113. The lubricating oil is stored at the bottom of the oil storage chamber 113. The lubricating oil at the bottom of the oil storage chamber 113 passes through the first return channel, the anti-rotation groove 232, the first return section 2111, the second return section 2112, the third return channel 411, the arc groove, the return hole of the bracket 42, and the return section of the bracket 42 in sequence before entering the back pressure chamber 33 to lubricate the bearing 32.

[0054] This invention also provides an air conditioner, including the scroll compressor described in the above embodiments. Specifically, the scroll compressor has been described in detail in the above embodiments, and for the sake of brevity, it will not be repeated here.

[0055] By adopting the scroll compressor of this embodiment, the structure of the stationary plate 21 is simplified, the processing difficulty of the stationary plate 21 is reduced, the manufacturing cost is reduced, and the valve plate fixing part 23 is limited and prevented from loosening.

[0056] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and these modifications or substitutions should all be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A scroll compressor characterized by, The exhaust cover assembly comprises an exhaust cover provided with a first oil return channel. The static scroll disc assembly comprises a static disc, an exhaust valve plate, a valve plate fixing member, and a circular first sealing ring, the static disc is provided with a second oil return channel, the static disc is fixedly installed with the exhaust cover, and the exhaust valve plate is fixed on the static disc through the valve plate fixing member. The valve plate fixing member is provided with an oil return part, and the oil return part is in communication with the first oil return channel and the second oil return channel respectively; one end of the valve plate fixing member is abutted with the exhaust cover, and the other end of the valve plate fixing member is fixed on the static disc through the exhaust valve plate, and the oil return part is formed by penetrating the valve plate fixing member from one end to the other end along the axial direction of the static disc. The static disc comprises a first end face close to the exhaust cover and a second end face away from the exhaust cover, the second oil return channel comprises a first oil return section, a second oil return section and a third oil return section, the first oil return section is formed by opening along the axial direction of the static disc from the first end face, the second oil return section is formed by opening along the radial direction of the static disc from the side wall of the static disc and is in communication with the first oil return section, the third oil return section is formed by opening along the axial direction of the static disc from the second end face and is in communication with the second oil return section, and the valve plate fixing member is fixed in the first oil return section and the oil return part is in communication with the first oil return section. A circular first sealing groove is formed on the first end face around the exhaust valve plate, and the first sealing ring is arranged in the first sealing groove. The static scroll disc assembly further comprises a sealing plug, one end of the second oil return section close to the side wall of the static disc is provided with a plug hole, and the sealing plug seals the plug hole.

2. The scroll compressor of claim 1, wherein One of the end face of the exhaust cover close to the static disc and the end face of the valve plate fixing member close to the exhaust cover is provided with a limiting boss, and the other is provided with a rotation stopping groove, and the limiting boss is arranged in the rotation stopping groove.

3. The scroll compressor according to any of claims 1-2, wherein, The exhaust cover is further provided with an oil storage cavity which is formed by opening along the radial direction of the exhaust cover, one end of the oil storage cavity penetrates the side wall of the exhaust cover to form an exhaust port, one end of the first oil return channel is in communication with the other end of the oil storage cavity away from the exhaust port, the other end of the first oil return channel penetrates the limiting boss, and one end of the oil return part close to the first oil return channel penetrates the rotation stopping groove.

4. The scroll compressor of claim 3, wherein The static scroll disc assembly further comprises a second sealing ring, a second sealing groove is formed on the end face of the valve plate fixing member close to the exhaust cover, the second sealing groove is formed around the rotation stopping groove, and the second sealing ring is arranged in the second sealing groove.

5. The scroll compressor of claim 4, wherein, The exhaust cover assembly comprises a cyclone separator, the cyclone separator is arranged in the oil storage cavity, one side of the exhaust cover close to the static disc is provided with an exhaust inlet, and the exhaust inlet penetrates the oil storage cavity along the axial direction of the exhaust cover and is directed to the cyclone separator.

6. The scroll compressor of claim 5, wherein, The scroll compressor further comprises a dynamic scroll disc assembly and a bracket assembly, the dynamic scroll disc assembly comprises a dynamic disc, the dynamic disc is engaged with the static disc, the bracket assembly comprises a bracket and a wear plate, a back pressure cavity is formed between the bracket and the dynamic disc, and the wear plate is arranged on the end face of the bracket close to the static disc and the dynamic disc.

7. The scroll compressor of any one of claims 1-2, wherein, ​ The third oil return channel is an arc-shaped groove extending along the edge of the wear-resistant sheet, one end of the arc-shaped groove is communicated with the second oil return channel, and the other end of the arc-shaped groove is communicated with the fourth oil return channel.

8. The scroll compressor of claim 7, wherein, The fourth oil return channel comprises a bracket oil return hole and a bracket oil return section, the bracket oil return hole is arranged on the end face of the bracket close to the wear-resistant sheet, the bracket oil return hole is communicated with the other end of the arc-shaped groove, one end of the bracket oil return section is communicated with the bracket oil return hole, and the other end of the bracket oil return section penetrates through the side wall of the bracket adjacent to the back pressure cavity to be communicated with the back pressure cavity.

9. The scroll compressor of claim 8, wherein, The scroll compressor comprises the scroll compressor as claimed in any one of claims 1-9.

10. An air conditioner characterized by comprising: The scroll compressor comprises the scroll compressor as claimed in any one of claims 1-9.

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