Compressor flange assembly, compressor and air conditioner

Abstract

The present invention provides a flange assembly of a compressor, a compressor, and an air conditioner. The flange assembly includes: a flange and an oil retaining structure. The flange includes a first axial end face and a second axial end face. The flange is provided with a first flow hole extending from the first axial end face to the second axial end face. The first flow hole allows refrigerant and oil to flow from the second axial end face of the flange to the first axial end face. The first exhaust hole is used for exhaust. The first flow hole is located radially outside the first exhaust hole. One end of the oil retaining structure is connected to the flange, and the other end extends toward the direction of the first flow hole. The oil retaining structure can block the mixture of refrigerant and oil flowing out of the first flow hole when the compressor is started at rest. According to the present invention, the problem of oil shortage caused by the outflow of refrigeration oil during low-temperature rest start-up can be solved, oil shortage of pump body parts can be avoided, its operating reliability can be ensured, and its performance and noise level can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of compressors, and in particular to a compressor flange assembly, a compressor and an air conditioner. Background Art

[0002] A rolling rotor compressor primarily consists of two components: the pump body and the motor. The pump body assembly primarily includes the cylinder, crankshaft, rollers, vanes, and upper and lower flanges. The pump body crankshaft and the motor rotor have an interference fit. The R-shaped end faces of the vanes, in line contact, press against the outer surface of the rollers under the action of spring force and internal shell back pressure, thereby dividing the internal volume formed by the cylinder and rollers into two crescent-shaped suction and compression chambers. The operating principle is that the crankshaft, driven by the motor's driving force, rotates periodically, and its eccentric structure drives the rollers to rotate synchronously, which in turn drives the vanes to perform radial reciprocating motion within the cylinder vane slots. This causes the volumes of the suction and compression chambers to change accordingly, thus achieving the compressor's cyclical intake, compression, and exhaust processes.

[0003] Under low-temperature static conditions, the compressor's oil pool contains a large amount of liquid refrigerant. During startup, the refrigerant in the oil pool, driven by temperature rise and pressure differentials within the casing, carries a significant amount of oil toward the upper chamber of the casing. This causes a significant amount of oil to enter the system piping through the compressor exhaust pipe, leading to oil starvation within the compressor and a poor oil film system within the pump components, preventing them from forming a proper oil film. This causes dry grinding and abnormal mechanical wear on components, reducing compressor performance and reliability. Furthermore, increased mechanical friction caused by oil starvation can also produce abnormal noise. Furthermore, oil that has entered the system and remains in the heat exchange piping can reduce heat exchange efficiency.

[0004] Since the pump body assembly of the rotary compressor in the prior art has technical problems such as the refrigeration oil flowing into the upper cavity through the waist-shaped hole along with the refrigerant when starting at low temperature, resulting in oil shortage, the present invention studies and designs a compressor flange assembly, a compressor and an air conditioner. Summary of the Invention

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the defect of the pump body assembly of the rotary compressor in the prior art that the refrigeration oil flows into the upper cavity along with the refrigerant through the waist-shaped hole when starting at low temperature, resulting in oil shortage, thereby providing a compressor flange assembly, a compressor and an air conditioner.

[0006] In order to solve the above problems, the present invention provides a flange assembly for a compressor, comprising:

[0007] A flange and an oil retaining structure, the flange includes a first axial end face and a second axial end face, and the flange is respectively provided with a first flow hole extending from the first axial end face to the second axial end face, the first flow hole can allow refrigerant and oil to flow from the second axial end face of the flange to the first axial end face, and the flange is also provided with a first exhaust hole for exhaust, and the first flow hole is located radially outside the first exhaust hole, one end of the oil retaining structure is connected to the flange, and the other end extends toward the direction of the first flow hole, and the oil retaining structure can block the mixture of refrigerant and oil flowing out of the first flow hole when the compressor is started at rest.

[0008] In some embodiments, the oil baffle structure is in the form of an oil baffle plate, including a connecting part and an oil baffle part, one end of the connecting part is connected to the flange, the other end of the connecting part is connected to one end of the oil baffle part, and the oil baffle part is opposite to the first flow hole.

[0009] In some embodiments, along a projection plane in the axial direction, a projected area of ​​the oil-blocking portion is larger than a projected area of ​​the first flow hole.

[0010] In some embodiments, the oil-blocking portion includes a planar area and a curved area, the planar area is a flat plate structure, the curved area is a bent structure, and one end of the planar area is connected to the connecting portion and the other end is connected to the curved area, that is, the curved area is connected to the free end of the planar area, and the curved area is bent toward the direction of the first flow hole.

[0011] In some embodiments, the connecting part includes a connecting body and a first hinged part, the first hinged part is arranged on the connecting body, a hollow area is provided inside the flange, and a second hinged part is also provided at the hollow area, and part of the structure of the connecting body extends into the hollow area, and the first hinged part and the second hinged part form a hinge so that the oil-blocking part can rotate around the first hinged part.

[0012] In some embodiments, the first hinge portion is a hinge groove provided on the connecting body, and the second hinge portion is a hinge head protruding from the edge of the hollow area, and the hinge head is clamped in the hinge groove.

[0013] In some embodiments, the hinge groove is a curved groove with a diameter of D2, the hinge head is a curved structure with a diameter of D1, and D1 / D2 satisfies: 0.98 <D1 / D2<1。

[0014] In some embodiments, a lower limit structure is further provided on the lower end surface of the connecting body, and an upper limit structure is further provided on the upper end surface of the connecting body. The hinge head is a protrusion provided on the lower end surface of the hollow area and protrudes upward. The hinge head is connected to the radial inner circumferential wall of the flange, and a third limit structure is further provided on the upper end surface of the hollow area to protrude downward. When the oil retaining structure rotates around the second hinge part, the lower limit structure can abut against the lower end surface of the hollow area to form a lower limit. When rotated to another position, the upper limit structure can abut against the third limit structure to form an upper limit.

[0015] In some embodiments, when the oil-blocking part includes a planar area and a curved area, and when the oil-blocking structure rotates to the point where the lower limit structure abuts the lower end surface of the hollow area, the planar area of ​​the oil-blocking part is parallel to the horizontal plane; when the oil-blocking structure rotates to the point where the upper limit structure abuts the third limit structure, the planar area of ​​the oil-blocking part tilts downward and forms a maximum angle θ with the horizontal plane, 0<θ<90°.

[0016] In some embodiments, θ satisfies: θ≤50°; when the oil-blocking structure rotates until the upper limit structure abuts the third limit structure, it is the maximum tilt state of the oil-blocking structure. At this time, the projection area of ​​the planar area in the axial plane is S1, and the projection area of ​​the first flow hole in the axial plane is S2, and S1>S2 is satisfied.

[0017] In some embodiments, the flange includes a first flange portion and a second flange portion, the first flange portion and the second flange portion are arranged in a close relationship, and at a position relatively close to the radial inner wall of the flange, a first hollow portion is formed by a recess on the end face of the first flange portion connected to the second flange portion, and a second hollow portion is formed by a recess on the end face of the second flange portion connected to the first flange portion, and the first hollow portion and the second hollow portion are spliced ​​to form the hollow area.

[0018] In some embodiments, the first flange portion is an upper flange portion, the second flange portion is a lower flange portion, the third limiting structure is a structure arranged on the upper flange portion and protruding downward, the second hinge portion is a structure arranged on the lower flange portion and protruding upward, and the third limiting structure is arranged opposite to the second hinge portion.

[0019] In some embodiments, the first axial end face is located on the first flange portion, the second axial end face is located on the second flange portion, the first flow hole passes through the first flange portion to the second flange portion, and the first exhaust hole passes through the second flange portion; an exhaust valve assembly is provided at the first exhaust hole.

[0020] In some embodiments, within the projection plane in the axial direction, the first flow hole is a waist-shaped hole; the oil-blocking structure is processed with an oleophobic material, or the surface of the oil-blocking structure is surface-treated with an oleophobic material to form an oleophobic layer.

[0021] The present invention also provides a compressor, which includes the flange assembly of the compressor described in any of the preceding items, and also includes a cylinder, the flange is arranged on the axial end face of the cylinder, and the cylinder is provided with a second flow hole and a second exhaust hole, the second flow hole is arranged opposite to the first flow hole, and the second exhaust hole is arranged opposite to the first exhaust hole.

[0022] The present invention also provides an air conditioner, which includes the aforementioned compressor.

[0023] The flange assembly of a compressor, the compressor, and the air conditioner provided by the present invention have the following beneficial effects:

[0024] 1. The present invention provides an oil baffle structure (oil baffle plate) on the flange, which extends toward the first circulation hole. The oil baffle structure can block the mixture of refrigerant and oil flowing out of the first circulation hole when the compressor is started at rest, thereby effectively blocking the refrigeration oil, especially when the compressor is started at low temperature. This prevents the refrigeration oil from entering the upper cavity along with the refrigerant through the waist-shaped hole (first circulation hole) in this starting state, causing oil shortage. This solves the problem of oil shortage caused by the outflow of refrigeration oil during low-temperature static starting, avoids oil shortage in pump body parts, ensures its operational reliability, and improves performance and noise levels. The present invention further adopts the oil baffle structure design of the connecting part and the oil baffle part, so that the connecting part can be used to fix the oil baffle part as a whole to the flange, and the oil baffle part is connected to the connecting part and extends to face the first flow hole. The structure of the oil baffle part can effectively block the oil and gas, recover the oil, and prevent it from being discharged; and the oil baffle structure of the present invention is arranged on the flange, does not occupy the volume of the lower chamber of the motor, and does not cause exhaust pulsation; the application adopts the structure of multiple connecting parts and oil baffle parts, which are arranged one by one in correspondence with the first flow hole, so as to increase the oil blocking area, improve the oil and gas separation rate, and have high structural strength;

[0025] 2. The present invention also connects the oil-blocking structure and the flange in a hinged manner, so that the oil-blocking part can rotate around the hinge part within a certain angle range when impacted by the oil-gas mixture, which can effectively form a buffering effect, blocking the oil and gas, improving the oil-gas separation rate, and at the same time increasing the service life of the oil-blocking structure; the movement range of the oil-blocking structure can be limited by the cooperation of multiple limiting structures, so that the maximum upward movement angle can only be parallel to the horizontal direction. Such a structure can increase the area of ​​oil and gas blocking, prevent upward warping and cause a decrease in oil blocking efficiency, and further improve the oil-gas separation rate; the present invention can also effectively improve its processing technology, reliability and oil return effect by limiting the range of multiple relevant parameters of the oil-blocking structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a cross-sectional view of a compressor pump assembly in the background art;

[0027] Figure 1-1 yes Figure 1 The pump body structure diagram after removing the upper and lower flanges;

[0028] Figure 2 is a cross-sectional structural diagram of the upper flange assembly of the present invention (at rest);

[0029] Figure 2-1 yes Figure 2 Structural diagram of the upper flange assembly in a stationary state;

[0030] Figure 2-2 yes Figure 2 Structural diagram of the upper flange assembly in working state;

[0031] Figure 3 It is a cross-sectional structural diagram of the upper flange of the present invention;

[0032] Figure 3-1 for Figure 3 A partial enlarged sectional view of the upper flange in FIG;

[0033] Figure 4-1 It is a front cross-sectional structural diagram of the oil baffle structure (oil baffle sheet) of the present invention;

[0034] Figure 4-2 1. It is a top view of the oil baffle structure (oil baffle sheet) of the present invention;

[0035] Figure 5 It is an alternative embodiment of the present invention: a cross-sectional view of the oil baffle (oblique transition);

[0036] Figure 6 This is a comparison chart of the oil circulation rate levels of the compressors of the best embodiment of the present invention and the conventional solution;

[0037] Figure 7 This is a comparison chart of the performance levels of the compressors of the best embodiment of the present invention and the conventional solution;

[0038] Figure 8 This is a comparison chart of the compressor noise levels of the optimal embodiment of the present invention and the conventional solution.

[0039] The reference numerals indicate:

[0040] 1. Flange; 11. First axial end face; 12. Second axial end face; 13. First circulation hole; 14. First exhaust hole; 15. Hollow area; 151. First hollow portion; 152. Second hollow portion; 16. Second hinged portion; 17. Third limiting structure; 18. First flange portion; 19. Second flange portion; 2. Oil retaining structure; 21. Connecting part; 211. Connecting body; 212. First hinged portion; 213. Lower limiting structure; 214. Upper limiting structure; 22. Oil retaining part; 221. Plane area; 222. Bending area; 5. Cylinder; 51. Second circulation hole; 52. Second exhaust hole; 53. Intake chamber; 54. Exhaust chamber; 6. Crankshaft; 7. Roller; 8. Lower flange; 9. Sliding vane. DETAILED DESCRIPTION

[0041] like Figure 2-8 As shown, the present invention provides a flange assembly for a compressor, which specifically includes:

[0042] A flange 1 and an oil retaining structure 2, wherein the flange 1 includes a first axial end face 11 and a second axial end face 12, and a first flow hole 13 is provided on the flange 1, which extends from the first axial end face 11 to the second axial end face 12. The first flow hole 13 can allow refrigerant and oil to flow from the second axial end face 12 of the flange 1 to the first axial end face 11. The flange is also provided with a first exhaust hole 14 for exhaust, and the first flow hole 13 is located radially outside the first exhaust hole 14. One end of the oil retaining structure 2 is connected to the flange 1, and the other end extends toward the direction of the first flow hole 13. The oil retaining structure 2 can block the mixture of refrigerant and oil flowing out of the first flow hole 13 when the compressor is started from a standstill.

[0043] The present invention provides an oil baffle structure (oil baffle plate) on the flange, which extends toward the first circulation hole. The oil baffle structure can block the mixture of refrigerant and oil flowing out of the first circulation hole when the compressor is started at rest, thereby effectively blocking the refrigeration oil, especially when the compressor is started at low temperature, and preventing the refrigeration oil from entering the upper cavity through the waist-shaped hole (first circulation hole) along with the refrigerant in this startup state, thereby preventing the oil shortage caused by the outflow of refrigeration oil during low-temperature static start-up, and avoiding the oil shortage of pump body parts, thereby ensuring its operational reliability and improving performance and noise level. In addition, the oil baffle structure of the present invention is provided on the flange, does not occupy the volume of the lower cavity of the motor, and does not cause exhaust pulsation. The present application provides a plurality of connecting parts and oil baffle structures, which are arranged one-to-one with the first circulation hole, thereby increasing the oil blocking area, improving the oil-gas separation rate, and having high structural strength.

[0044] The present invention innovatively proposes a rotor compressor oil stabilization assembly. By installing an oil baffle in the hollow area set in the flange on the pump body, it can prevent the phenomenon that part of the pump body's refrigeration oil mixes with the high-pressure refrigerant gas and then passes through the hollow part of the upper flange into the upper cavity of the compressor during the operation of the compressor, and then is discharged from the compressor, causing reliability, performance and noise problems caused by insufficient refrigeration oil in the compressor.

[0045] The following technical problems existing in conventional rolling rotor compressors have been solved: during the operation of the rotor compressor, after starting under low-temperature static adjustment, the refrigerant oil is mixed with the high-pressure refrigerant and discharged from the compressor together. As the operating time increases, the amount of refrigerant oil in the compressor gradually decreases, causing the pump body component to be in an abnormal oil-deficient state and unable to form a normal oil film, resulting in abnormal mechanical wear, affecting its performance and reliability, while reducing its noise level.

[0046] In some embodiments, the oil baffle structure 2 is in the form of an oil baffle plate, comprising a connecting portion 21 and an oil baffle portion 22. One end of the connecting portion 21 is connected to the flange 1, and the other end of the connecting portion 21 is connected to one end of the oil baffle portion 22. The oil baffle portion 22 is opposite to the first circulation hole 13. The present invention further utilizes the oil baffle plate structural design of the connecting portion and the oil baffle portion, so that the connecting portion can be used to fix the oil baffle portion as a whole to the flange. The oil baffle portion is connected to the connecting portion and extends to face the first circulation hole. The structure of the oil baffle portion can effectively block oil and gas, recover oil, and prevent it from being discharged.

[0047] The invention of the present invention is to provide a rotor compressor oil stabilization component, which includes an oil baffle structure. This component can improve the problem that the refrigeration oil flows into the upper chamber of the compressor along with the refrigerant through the waist-shaped hole of the upper flange during the operation of the compressor, resulting in a reduction in the amount of refrigeration oil in the pump body parts. This can avoid the phenomenon of oil shortage in the pump body parts, ensure its operational reliability, and improve its performance and noise level. Limiting the range of relevant parameters of the oil stabilization component can improve its reliability and oil return effect. The specific invention points are as follows:

[0048] (1) An oil stabilization assembly for a rotary compressor, comprising an upper flange and an oil baffle. The upper flange is a combined structure of upper and lower spliced ​​structures, consisting of an upper portion and a lower portion of the upper flange located in the axial direction. The oil baffle is divided into a connecting portion and an oil baffle portion, and is mounted on the upper flange.

[0049] In the conventional compressor pump structure ( Figure 1 Based on the principle of a pump with a throttle position (as shown in Figure 1), the present invention optimizes the pump body structure to provide an oil stabilization assembly consisting of an upper flange and an oil baffle. This structure can alleviate the problem of refrigeration oil mixing with refrigerant during low-temperature static startup, where the refrigerant oil, under the influence of gas pressure, rushes upward through the waist-shaped holes in the upper flange, enters the upper chamber, and exits the compressor. This improves the compressor's oil return, performance, and noise levels.

[0050] The rolling rotor compressor is mainly composed of two parts: the pump body and the motor. Figure 1-1 As shown in Figure 1-2, the pump assembly mainly includes a cylinder, crankshaft, rollers, vanes, and upper and lower flanges. The pump crankshaft and the motor rotor have an interference fit, and the R-shaped end face of the vane is in line contact with the outer surface of the roller under the action of spring force and back pressure in the shell, thereby dividing the internal volume formed by the cylinder and roller into two crescent-shaped suction and compression chambers. Its working principle is that the crankshaft rotates periodically under the driving force of the motor, and its eccentric structure drives the roller to rotate synchronously eccentrically, thereby driving the vane to perform radial reciprocating motion in the cylinder vane slot, causing the volume of the suction and compression chambers to change accordingly, thereby realizing the cyclical suction, compression, and exhaust process of the compressor.

[0051] like Figure 2 、 2-1Figure 2-2 shows the oil stabilization assembly of the present invention. When the compressor is running, the refrigerant oil in the pump body mixes with the compressed high-pressure refrigerant. Under the action of gas force and the pressure difference between the upper and lower chambers of the compressor, the refrigerant oil follows the high-pressure refrigerant from bottom to top and enters the upper chamber of the compressor. If the designed oil baffle is installed on the upper flange, the gas-liquid mixture of the refrigerant oil and the high-pressure refrigerant will hit the oil baffle when passing through the waist-shaped hole of the upper flange, thereby preventing the refrigerant oil in the gas-liquid mixture from being separated from the refrigerant and adhering to the oil baffle. Then, it flows back to the pump body and the oil pool along the inner side under the action of gravity. This can effectively prevent the refrigerant oil from entering the upper chamber of the compressor and then being discharged. The pump body is short of oil, causing abnormal friction and leakage, reducing the oil circulation rate of the compressor, and improving the oil return effect, performance and noise level.

[0052] In some embodiments, the projected area of ​​the oil-blocking portion 22 in the axial projection plane is larger than the projected area of ​​the first circulation hole 13. By making the projected area of ​​the oil-blocking portion in the axial direction larger than the projected area of ​​the first circulation hole, the present invention can maximize the amount of oil and gas flowing out of the first circulation hole to be blocked by the oil-blocking portion, thereby further effectively increasing the oil-gas separation rate.

[0053] In some embodiments, the oil baffle portion 22 includes a planar region 221 and a curved region 222. The planar region 221 is a flat plate, while the curved region 222 is a bent structure. The planar region 221 is connected to the connecting portion 21 at one end and to the curved region 222 at the other end, i.e., the curved region 222 is connected to the free end of the planar region 221, and the curved region 222 curves toward the first flow hole 13. The present invention further optimizes the oil baffle portion to include a planar region and a curved region. This allows the curved region, which curves toward the first flow hole, to effectively direct the oil blocked at the lower end of the oil baffle toward the first flow hole, thereby separating the oil and returning it to the pump structure, further improving oil-gas separation efficiency. The curved region primarily facilitates smoother flow of refrigerant oil from the upper chamber back to the oil baffle plate along the inclined plane of the oil baffle plate back to the pump body and oil sump. The planar region primarily blocks the large amount of refrigerant oil pumped out of the waist-shaped hole in the upper flange during low-temperature static conditions.

[0054] The bending area of ​​the main embodiment of the present invention is an arc-shaped bending structure, such as Figure 4-1 , and alternative embodiments wherein the curved region is a curved structure in the form of an inclined plate, such as Figure 5 .

[0055] Alternatively, in the present invention, the curved area of ​​the oil baffle may also adopt an inclined transition or other transition methods.

[0056] In some embodiments, the connecting portion 21 includes a connecting body 211 and a first hinge portion 212. The first hinge portion 212 is provided on the connecting body 211. An emptying area 15 is provided inside the flange 1, and a second hinge portion 16 is also provided at the emptying area 15. A part of the structure of the connecting body 211 extends into the emptying area 15, and the first hinge portion 212 and the second hinge portion 16 form a hinge connection, so that the oil baffle portion 22 can rotate around the first hinge portion 212. This is a further preferred structural form of the connecting portion of the present invention. Through the connecting body, it can effectively extend into the emptying area inside the flange. The first hinge portion can effectively form a hinge fit with the second hinge portion on the flange, so that a hinge fit is completed between the oil baffle portion and the flange, enabling the oil baffle portion to rotate without detaching from the flange. And by connecting the oil baffle structure and the flange in a hinged manner, the oil baffle portion can rotate within a certain angle range around the hinge portion when impacted by the oil-gas mixture, effectively forming a buffering effect. When blocking the oil and gas, it can improve the oil-gas separation rate and at the same time increase the service life of the oil baffle structure, reducing the probability of fatigue fracture and the like. [[ID=!]]

[0057] In some embodiments, the first hinge portion 212 is a hinge groove opened on the connecting body 211, and the second hinge portion 16 is a hinge head protruding from the edge of the emptying area 15. The hinge head is clamped in the hinge groove. This is a further preferred structural form of the first and second hinge portions of the present invention, that is, the first hinge portion is a hinge groove on the connecting body, and the second hinge portion is a hinge head on the flange, so that the hinge head is clamped in the hinge groove, and the two complete the hinge connection, enabling the oil baffle portion to rotate around the hinge head.

[0058] (2) In the lower groove of the upper flange as described in (1), there is a hinge head structure provided. The connecting portion of the oil baffle is in the shape of a slender rod, and a hinge groove is opened thereon, which can cooperate with the hinge head in the lower groove of the upper flange.

[0059] Alternatively, in the solution of the present invention, the connection between the oil baffle and the upper flange can also adopt a hinge connection.

[0060] In some embodiments, the hinge groove is an arc-shaped groove with a diameter of D2, the hinge head is an arc-shaped structure with a diameter of D1, and D1 / D2 satisfies: 0.98 < D1 / D2 < 1. This can effectively improve the smoothness of the hinge fit between the two.

[0061] (3) Let the diameter of the hinge groove of the oil baffle be D2, and the ratio D1 / D2 of the diameter D1 of the hinge head in the upper flange groove to the diameter D2 of the hinge groove of the oil baffle should satisfy: 0.98 < D1 / D2 < 1, which can effectively improve its smoothness of fit.

[0062] In some embodiments, a lower limit structure 213 is further provided on the lower end surface of the connecting body 211, and an upper limit structure 214 is further provided on the upper end surface of the connecting body 211. The hinged head is a protrusion provided on the lower end surface of the hollow area 15 and protruding upward. The hinged head is connected to the radial inner peripheral wall of the flange. A third limit structure 17 is further provided on the upper end surface of the hollow area 15, protruding downward. When the oil retaining structure 2 rotates around the second hinged portion 16, the lower limit structure 213 can abut against the lower end surface of the hollow area 15 to form a lower limit. When it rotates to another position, the upper limit structure 214 can abut against the third limit structure 17 to form an upper limit. The present invention can also limit the range of motion of the oil retaining structure through the cooperation of multiple limit structures, in order to better increase the area of ​​oil and gas blocking, prevent upward warping and the reduction of oil blocking efficiency, further improve the oil and gas separation rate, and prevent the oil retaining part from falling off.

[0063] (4) A rectangular raised limiting structure is provided below and above the tail end of the oil baffle connecting portion as described in (1), (2), and (3).

[0064] like Figure 4-1 、 4-2 The figure shows the parts diagram of the oil baffle of the present invention. The oil baffle is divided into a connecting part and an oil baffle part. The connecting part is in the shape of a slender rod, and a hinge groove is provided on the lower side of the connecting part. The hinge groove can be hingedly matched with the hinge head in the hollow area of ​​the upper flange. In addition, upper and lower raised limiting structures are respectively provided on the upper and lower end faces of the connecting part. The cross section of the raised part is rectangular and has the same width as the connecting part. The oil baffle part is composed of a plane area and a curved area. The curved area is located at the outermost edge of the oil baffle part and is bent downwardly toward the waist hole of the upper flange. Its shape is an arc, which is conducive to enhancing the oil return effect. At the same time, the contour line of the plane area of ​​the oil baffle close to the connecting part must also be consistent with the inner circle contour of the upper flange skirt to prevent the oil baffle ring from interfering with the upper flange during installation.

[0065] In some embodiments, when the oil-blocking portion 22 includes a flat area 221 and a curved area 222, and when the oil-blocking structure 2 is rotated to the point where the lower limiting structure 213 abuts against the lower end face of the hollow area 15, the flat area 221 of the oil-blocking portion 22 is parallel to the horizontal plane; when the oil-blocking structure 2 is rotated to the point where the upper limiting structure 214 abuts against the third limiting structure 17, the flat area 221 of the oil-blocking portion 22 is tilted downward and is clamped at a maximum angle θ with the horizontal plane, 0<θ<90°. The present invention can also limit the range of motion of the oil-blocking structure through the cooperation of multiple limiting structures, so that the maximum angle of its upward motion can only be parallel to the horizontal direction. Such a structure can increase the area of ​​oil and gas blocking, prevent upward warping and the reduction of oil blocking efficiency, and further improve the oil and gas separation rate.

[0066] During the compressor's low-temperature, static start-up, the refrigerant oil in the oil sump creates a pressure differential and flows upward from the upper flange's waist-shaped holes. This oil impacts the lower surface of the oil baffle, causing the oil baffle to enter its operating state and rotate upward until the lower limit of the oil baffle's connection contacts the horizontal surface of the hollowed-out area, where it stops and remains horizontal. In this state, the refrigerant oil is blocked by the oil baffle and flows downward along its inner wall back into the pump body and the oil sump.

[0067] In some embodiments, θ satisfies: θ≤50°; when the oil baffle structure 2 rotates to the point where the upper limit structure 214 abuts the third limit structure 17, it is the maximum tilt state of the oil baffle structure 2. At this time, the projected area of ​​the planar area 221 in the axial plane is S1, and the projected area of ​​the first flow hole 13 in the axial plane is S2, and they satisfy S1>S2. θ≤50° can effectively limit the maximum tilt angle of the oil baffle plate, preventing its tilt angle from being too large, which would prevent the oil baffle plate from playing a buffering role for the refrigerant oil flowing back from the upper chamber; due to the tilted state, the horizontal projection area of ​​the oil baffle plate's planar area is smaller than its area in the horizontal state. Here, the horizontal projection area of ​​the planar area of ​​the oil baffle plate in the maximum tilt state is limited to be larger than the horizontal projection area of ​​the waist-shaped hole of the upper flange. The purpose is to ensure that the oil baffle plate can completely cover the waist-shaped hole of the upper flange at any tilt angle, thereby effectively blocking the large amount of refrigerant oil pumped out of the waist-shaped hole.

[0068] (5) Assume that the maximum angle between the oil baffle and the horizontal direction after tilting is θ, which should satisfy the following: θ≤50°.

[0069] (6) The oil retaining portion of the oil retaining plate as described in (1)(2)(3)(4)(5) consists of a plane area and a curved area. Assume that the horizontal projection area of ​​the plane area in the maximum tilt state of the oil retaining plate is S1, and the horizontal projection area of ​​the waist-shaped hole of the upper flange is S2, which must satisfy: S1>S2.

[0070] The oil baffle is hingedly mounted within the hollowed-out area of ​​the upper flange. During compressor operation, when the amount of refrigerant oil flowing out of the waist-shaped hole in the upper flange is minimal, the oil baffle remains stationary, and its outer oil-blocking portion weighs more than the connecting portion. Furthermore, due to the hinged connection between the oil baffle and the upper flange, the two can pivot about the joint. Under the influence of gravity, the oil baffle tilts downward and to one side of the oil baffle, facilitating the return of refrigerant oil from the compressor's upper chamber back into the compressor pump body and oil sump, enhancing lubrication. After reaching a certain angle, the upper limit portion is unable to tilt further due to contact with the inner wall of the hollowed-out area. This also prevents the oil baffle from over-tilting and failing to cushion the returning refrigerant oil. Because the position and size of the upper limit portion within the connecting portion determine the maximum tilt angle of the oil baffle, to ensure effective oil return, the design of the upper limit portion requires that the maximum tilt angle θ of the oil baffle meet the following requirements: θ ≤ 50°.

[0071] Furthermore, let's assume that the horizontal projection area of ​​the oil baffle's planar area in its maximum tilted state is S1, and the horizontal projection area of ​​the upper flange's waist-shaped hole is S2. The following must hold: S1 > S2. During actual compressor operation, the oil baffle is in a semi-tilted state (between its maximum tilted state and its horizontal state) due to the combined effects of refrigerant oil returning from the upper chamber and refrigerant oil flowing upward from the lower chamber. Therefore, when the oil baffle is in its maximum tilted state, the horizontal projection of its planar area must completely cover the horizontal projection of the upper flange's waist-shaped hole to ensure that the oil baffle can function effectively at any position within its rotational range.

[0072] In some embodiments, the flange 1 includes a first flange portion 18 and a second flange portion 19, the first flange portion 18 and the second flange portion 19 are arranged in a close relationship, and at a position relatively close to the radial inner circumferential wall of the flange 1, a first hollow portion 151 is formed by a depression on the end face of the first flange portion 18 that is connected to the second flange portion 19, and a second hollow portion 152 is formed by a depression on the end face of the second flange portion 19 that is connected to the first flange portion 18, and the first hollow portion 151 and the second hollow portion 152 are spliced ​​to form the hollow area 15. The present invention also uses two separate flange portions so that the two can be spliced ​​into a bent flange, mainly for processing and manufacturing the two hollow portions so that the two can be spliced ​​to form a hollow area, and can facilitate the installation of the oil retaining structure.

[0073] (7) As shown in (1), the upper and lower parts of the combined upper flange are provided with grooves at corresponding positions. The two parts are combined to form a complete hollow area, and the hollow area must be located above the waist-shaped hole of the upper flange. In order to ensure that the refrigeration oil pumped out from the waist-shaped hole of the upper flange can be effectively blocked during the low-temperature static start-up state, the oil baffle must be located directly above the waist-shaped hole of the upper flange.

[0074] In some embodiments, the first flange portion 18 is an upper flange portion, the second flange portion 19 is a lower flange portion, the third limiting structure 17 is a structure provided on the upper flange portion and protruding downward, the second hinge portion 16 is a structure provided on the lower flange portion and protruding upward, and the third limiting structure 17 is provided opposite to the second hinge portion 16. This is a further preferred structural form of the first and second flange portions of the present invention, i.e., two upper and lower opposing limiting structures and the second hinge portion, which can effectively limit the oil retaining structure, prevent the oil retaining structure from falling out of the hollow area, and can also meet the functions of articulated rotation and motion limiting of the oil retaining structure.

[0075] like Figure 3 、 3-1 The figure shows the upper flange components of the present invention. The upper flange is a combined upper and lower structure, consisting of an upper and lower portion. A groove is defined in corresponding locations on both the upper and lower portions of the upper flange. When joined, the two grooves create a hollow area for the oil deflector to be installed. This hollow area must be positioned directly above the waist-shaped hole in the upper flange to ensure the oil deflector properly functions as a barrier. Furthermore, a hinged head is located in the groove in the lower portion of the upper flange for mounting the oil deflector.

[0076] In some embodiments, the first axial end face 11 is located on the first flange portion 18, the second axial end face 12 is located on the second flange portion 19, the first flow hole 13 extends from the first flange portion 18 to the second flange portion 19, and the first exhaust hole 14 extends through the second flange portion 19. An exhaust valve assembly is provided at the first exhaust hole 14. This describes the positions of the first and second axial end faces, as well as the positions and forms of the first flow hole and the first exhaust hole in the present invention.

[0077] In some embodiments, within the axial projection plane, the first circulation hole 13 is a waist-shaped hole; the oil retaining structure is processed using an oleophobic material, or the surface of the oil retaining structure is surface-treated with an oleophobic material to form an oleophobic layer. A waist-shaped hole is a preferred structural form of the first circulation hole of the present invention. Furthermore, the present invention processes the oil retaining structure using an oleophobic material, or uses an oleophobic material to surface-treat the oil retaining structure to form an oleophobic layer, thereby preventing the refrigerant oil from adhering to the surface of the oil stabilizing ring, improving its oil return performance and increasing the amount of oil returned.

[0078] The present invention also provides a compressor, which includes the flange assembly of the compressor described in any of the preceding items, and also includes a cylinder 5, the flange 1 is arranged on the axial end face of the cylinder, and the cylinder 5 is provided with a second flow hole 51 and a second exhaust hole 52, the second flow hole 51 is arranged opposite to the first flow hole 13, and the second exhaust hole 52 is arranged opposite to the first exhaust hole 14.

[0079] This invention provides a rotary compressor. Its key innovation lies in an oil baffle installed on the upper flange skirt. This prevents refrigerant oil from entering the compressor's upper chamber along with the high-pressure refrigerant through the upper flange's waist-shaped holes and then discharging. This reduces the compressor's oil discharge rate, ensuring sufficient refrigerant oil for lubrication and sealing of the compressor pump assembly, ensuring operational reliability and improving performance and noise levels. Furthermore, limiting the range of parameters associated with the oil stabilization component further enhances its reliability and oil return performance.

[0080] like Figure 6 、 7 Figures 8 and 9 respectively compare the oil circulation rate, performance, and noise of compressors using the present invention and conventional designs. After multiple rounds of compressor trial production and testing based on the present invention's parameter range, compared with test data from conventional compressors, the oil circulation rate was significantly reduced. In terms of performance, the present invention's design prototype surpassed the conventional design prototype in terms of the new national standard single-point COP. Furthermore, its low-frequency noise level also significantly surpassed that of the conventional design prototype.

[0081] The present invention also provides an air conditioner, comprising the compressor described in any one of the preceding items.

[0082] The technical solution of the present invention is not only applicable to rotary compressors, but also to rotary fluid machinery with similar structures, such as rotary expanders, vane compressors, vane expanders, etc.

[0083] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention. The above description is merely a preferred embodiment of the present invention. It should be noted that those skilled in the art can make various improvements and variations without departing from the technical principles of the present invention, and such improvements and variations shall also be considered within the scope of protection of the present invention.

Claims

1. A flange assembly for a compressor, characterized in that: include: A flange (1) and an oil retaining structure (2), wherein the flange (1) comprises a first axial end face (11) and a second axial end face (12), and the flange (1) is provided with a first flow hole (13) extending from the first axial end face (11) to the second axial end face (12), wherein the first flow hole (13) can allow refrigerant and oil to flow from the second axial end face (12) of the flange (1) to the first axial end face (11), and the flange is further provided with a first exhaust hole (14) for exhaust, wherein the first flow hole (13) is located radially outward of the first exhaust hole (14), one end of the oil retaining structure (2) is connected to the flange (1), and the other end extends toward the direction of the first flow hole (13), and the oil retaining structure (2) can shield the refrigerant and oil mixture flowing out of the first flow hole (13) when the compressor is started at rest; The oil baffle structure (2) is in the form of an oil baffle plate, comprising a connecting portion (21) and an oil baffle portion (22), one end of the connecting portion (21) being connected to the flange (1), the other end of the connecting portion (21) being connected to one end of the oil baffle portion (22), and the oil baffle portion (22) being opposite to the first flow hole (13); The connecting portion (21) includes a connecting body (211) and a first hinged portion (212), wherein the first hinged portion (212) is arranged on the connecting body (211), a hollow area (15) is arranged inside the flange (1), and a second hinged portion (16) is also arranged at the hollow area (15), and a part of the structure of the connecting body (211) extends into the hollow area (15), and the first hinged portion (212) and the second hinged portion (16) are hinged to enable the oil-blocking portion (22) to rotate around the first hinged portion (212).

2. The compressor flange assembly according to claim 1, characterized in that: In a projection plane along the axial direction, a projection area of ​​the oil-blocking portion (22) is larger than a projection area of ​​the first flow hole (13).

3. The compressor flange assembly according to claim 1, characterized in that: The oil-blocking portion (22) comprises a plane region (221) and a curved region (222), wherein the plane region (221) is a flat plate structure, and the curved region (222) is a bent structure, and one end of the plane region (221) is connected to the connecting portion (21), and the other end is connected to the curved region (222), that is, the curved region (222) is connected to the free end of the plane region (221), and the curved region (222) is bent toward the first flow hole (13).

4. The compressor flange assembly according to claim 1, characterized in that: The first hinge portion (212) is a hinge groove provided on the connecting body (211), and the second hinge portion (16) is a hinge head protruding from the edge of the hollow area (15), and the hinge head is clamped in the hinge groove.

5. The compressor flange assembly according to claim 4, characterized in that: The hinge groove is a curved groove with a diameter of D2. The hinge head is a curved structure with a diameter of D1. D1 / D2 satisfies: 0.98 <D1 / D2<1。 6. The compressor flange assembly according to claim 5, characterized in that: A lower limit structure (213) is also provided on the lower end surface of the connecting body (211), and an upper limit structure (214) is also provided on the upper end surface of the connecting body (211). The hinged head is a protrusion provided on the lower end surface of the hollow area (15) and protruding upward. The hinged head is connected to the radial inner peripheral wall of the flange. A third limit structure (17) is also provided on the upper end surface of the hollow area (15) and protrudes downward. When the oil retaining structure (2) rotates around the second hinged part (16), the lower limit structure (213) can abut against the lower end surface of the hollow area (15) to form a lower limit. When the upper limit structure (214) rotates to another position, it can abut against the third limit structure (17) to form an upper limit.

7. The compressor flange assembly according to claim 6, characterized in that: When the oil-blocking portion (22) includes a plane area (221) and a curved area (222), and when the oil-blocking structure (2) rotates to the point where the lower limit structure (213) abuts against the lower end face of the hollow area (15), the plane area (221) of the oil-blocking portion (22) is parallel to the horizontal plane; when the oil-blocking structure (2) rotates to the point where the upper limit structure (214) abuts against the third limit structure (17), the plane area (221) of the oil-blocking portion (22) tilts downward and forms a maximum angle θ with the horizontal plane, 0<θ<90°.

8. The compressor flange assembly according to claim 7, characterized in that: θ satisfies: θ≤50°; when the oil retaining structure (2) rotates to the point where the upper limit structure (214) abuts against the third limit structure (17), it is the maximum tilt state of the oil retaining structure (2), at which time the projected area of ​​the planar region (221) in the axial plane is S1, the projected area of ​​the first flow hole (13) in the axial plane is S2, and S1>S2 is satisfied.

9. The compressor flange assembly according to claim 6, characterized in that: The flange (1) includes a first flange portion (18) and a second flange portion (19), the first flange portion (18) and the second flange portion (19) are arranged in a close relationship, and at a position relatively close to the radial inner peripheral wall of the flange (1), a first hollow portion (151) is formed by a depression on the end surface of the first flange portion (18) connected to the second flange portion (19), and a second hollow portion (152) is formed by a depression on the end surface of the second flange portion (19) connected to the first flange portion (18), and the first hollow portion (151) and the second hollow portion (152) are spliced ​​to form the hollow area (15).

10. The compressor flange assembly according to claim 9, characterized in that: The first flange portion (18) is an upper flange portion, the second flange portion (19) is a lower flange portion, the third limiting structure (17) is a structure arranged on the upper flange portion and protruding downward, the second hinge portion (16) is a structure arranged on the lower flange portion and protruding upward, and the third limiting structure (17) is arranged opposite to the second hinge portion (16).

11. The compressor flange assembly according to claim 9, characterized in that: The first axial end face (11) is located on the first flange portion (18), the second axial end face (12) is located on the second flange portion (19), the first flow hole (13) passes through the first flange portion (18) to the second flange portion (19), and the first exhaust hole (14) passes through the second flange portion (19); an exhaust valve assembly is provided at the first exhaust hole (14).

12. The compressor flange assembly according to any one of claims 1 to 11, characterized in that: In the projection plane in the axial direction, the first flow hole (13) is a waist-shaped hole; the oil retaining structure is processed with an oleophobic material, or the surface of the oil retaining structure is surface-treated with an oleophobic material to form an oleophobic layer.

13. A compressor, characterized in that: A flange assembly of a compressor according to any one of claims 1 to 12, further comprising a cylinder (5), wherein the flange (1) is arranged on the axial end face of the cylinder, and a second flow hole (51) and a second exhaust hole (52) are provided on the cylinder (5), wherein the second flow hole (51) is arranged opposite to the first flow hole (13), and the second exhaust hole (52) is arranged opposite to the first exhaust hole (14).

14. An air conditioner, characterized in that: Including the compressor according to claim 13.

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