Scroll compressor

Abstract

The utility model provides a scroll compressor which at least comprises a scroll assembly, a rack, a driving shaft and an oil collecting cover, the scroll assembly comprises a movable scroll plate and a static scroll plate, the movable scroll plate is arranged below the static scroll plate, and a compression chamber for compressing refrigerant gas is formed between the movable scroll plate and the static scroll plate so as to compress the refrigerant gas; the rack comprises a main body part, the main body part is constructed to support the movable scroll plate, a thrust surface is formed between the main body part and the movable scroll plate, and an inner cavity is formed in the rack; the driving shaft is configured to be rotationally arranged on the rack, and the upper end of the driving shaft is located in the inner cavity; and the oil collecting cover is used for directly collecting and guiding lubricating oil flowing out of the driving shaft to a thrust surface between the rack and the movable scroll plate under the driving of the driving shaft. The scroll compressor disclosed by the utility model can effectively ensure the lubrication requirement of the thrust surface, so that the wear of the thrust surface is prevented, and the operation reliability of the scroll compressor is improved.

Description

Technical Field

[0001] The present disclosure relates to the field of refrigeration equipment, and in particular to a scroll compressor. Background Art

[0002] Scroll compressors are widely used in refrigeration, air conditioning, heat pumps and other fields due to their high efficiency, small size, light weight and smooth operation.

[0003] In a vertical scroll compressor, the movable scroll of the scroll compressor is directly placed on a fixed frame in the axial direction and supported by the thrust surface of the frame. In this way, during the operation of the scroll compressor, the thrust surface between the frame and the movable scroll will form relative friction. When the lubricating oil cannot be continuously or timely supplied to the friction pair, the thrust surface may be worn. When the thrust surface is severely worn, the performance of the scroll compressor will be reduced, or even the compressor will fail.

[0004] In the current lubrication oil supply system of the compressor, most of the lubricating oil is directly thrown into the frame oil pool and discharged. Only a small amount of oil supply will splash the lubricating oil to the thrust surface for lubrication due to the impact, stirring of the balance block or the action of the shovel oil surface. Since the oil supply starts from the start of the compressor to the thrust surface, the lubricating oil needs to wait for the oil level in the oil pool to gather to a certain height before it can work. There will be a long delay, during which the thrust surface lacks oil supply and has a greater risk of wear. In addition, the oil stored in the frame oil pool stirred by the balance block will cause a large power loss, and cannot directly and efficiently prevent the wear of the thrust surface of the scroll compressor. Utility Model Content

[0005] In order to solve the problems existing in the prior art, the present disclosure provides a scroll compressor.

[0006] According to a first aspect of the present disclosure, there is provided a scroll compressor, comprising:

[0007] A scroll assembly, the scroll assembly comprising an orbiting scroll and a fixed scroll, the orbiting scroll being disposed below the fixed scroll and being configured to form a compression chamber for compressing refrigerant gas between the orbiting scroll and the fixed scroll, so as to compress the refrigerant gas;

[0008] A frame, the frame comprising a main body, the main body being configured to support the orbiting scroll, a thrust surface being formed between the main body and the orbiting scroll, and an inner cavity being formed in the frame;

[0009] A drive shaft, the drive shaft being configured to be rotatably disposed on the frame, and an upper end of the drive shaft being located in the inner cavity;

[0010] An oil collecting hood is arranged in the inner cavity and is fixedly connected to the upper end of the drive shaft in a direct or indirect manner, and is used to collect and guide the lubricating oil flowing out of the drive shaft directly to the thrust surface between the frame and the movable scroll under the drive of the drive shaft.

[0011] In one embodiment of the present disclosure, an outer wall is provided on the circumferential outer side of the oil collecting hood, and the outer wall is configured to receive at least part of the lubricating oil flowing out from the oil outlet hole in a radial direction, so as to prevent at least part of the lubricating oil on the receiving surface from being thrown out from the receiving surface under the action of centrifugal force.

[0012] In one embodiment of the present disclosure, the oil collecting cover is configured to cover an angle ranging from 30° to 180° on a cross section of the scroll compressor.

[0013] In one embodiment of the present disclosure, the front end of the oil collecting cover in the rotation direction is the first end, and the rear end in the rotation direction is the second end;

[0014] The height of the first end of the oil collecting hood is lower than that of the second end, and the first end and the second end are transitioned by a slope surface. The first end is constructed to serve as the receiving surface, and the lubricating oil flowing out from the oil outlet hole to the first end is configured to flow upward to the thrust surface when flowing through the slope surface.

[0015] In one embodiment of the present disclosure, an oil outlet passage is provided in the drive shaft, and the oil outlet hole of the oil outlet passage is provided on the top surface of the eccentric portion; the oil collecting hood is constructed to be arranged on a side adjacent to the oil outlet hole, and a receiving surface is provided on the oil collecting hood, and the height of the receiving surface is constructed to be lower than the bottom surface height of the mating cavity.

[0016] In one embodiment of the present disclosure, a balancing block is further included, which is arranged at the upper end of the driving shaft and is constructed to provide a reverse torque to balance the dynamic imbalance generated when the eccentric portion drives the movable scroll plate to rotate; the oil collecting cover is constructed to be fixedly arranged on the balancing block.

[0017] In one embodiment of the present disclosure, the balancing block includes a fixed ring and a counterweight block, wherein the fixed ring is configured to be fixedly sleeved on the drive shaft of the scroll compressor; the counterweight block is configured to be connected to the fixed ring, and the fixed ring and the counterweight block are engaged through matching serrated surfaces;

[0018] The oil collecting cover is configured to be fixedly disposed on the counterweight block, and is balanced together with the fixing ring and the counterweight block to balance the dynamic unbalance amount generated when the eccentric portion drives the movable scroll to rotate.

[0019] In one embodiment of the present disclosure, the front end of the oil collecting cover in the rotation direction is the first end, and the rear end in the rotation direction is the second end;

[0020] The second end of the oil collecting hood is fixedly arranged on the balancing block, and the height of the first end is lower than the height of the second end, and the first end and the second end are transitioned by a slope surface, and the first end is constructed to serve as the receiving surface, and the lubricating oil flowing out from the oil outlet hole to the first end is configured to flow upward to the thrust surface when flowing through the slope surface.

[0021] In one embodiment of the present disclosure, the front end of the oil collecting cover in the rotation direction is the first end, the rear end in the rotation direction is the second end, and the portion between the first end and the second end is the middle section;

[0022] The first end and the second end of the oil collecting hood are both fixedly arranged on the balancing block, and the height of the middle section is lower than the height of the second end, and the middle section and the second end are transitioned by a slope surface, and the middle section is constructed to serve as the receiving surface, and the lubricating oil flowing out from the oil outlet hole to the middle section is configured to flow upward to the thrust surface when flowing through the slope surface.

[0023] In one embodiment of the present disclosure, the slope of the oil collecting cover is configured to be disposed on the front side of the counterweight in the rotation direction.

[0024] In one embodiment of the present disclosure, the outer wall is constructed to continuously increase in height from the first end to the second end.

[0025] In one embodiment of the present disclosure, an inner wall is provided on the circumferential inner side of the oil collecting hood, the top height of the inner wall is constructed to be lower than the bottom height of the matching cavity, and together with the outer wall and the receiving surface, an oil storage groove is formed to allow part of the lubricating oil to remain in the oil storage groove during the process of the scroll compressor.

[0026] In one embodiment of the present disclosure, the oil collecting hood is a stamped metal part or a plastic part.

[0027] In one embodiment of the present disclosure, the oil collecting cover is configured to be integrally formed with the balancing weight.

[0028] In one embodiment of the present disclosure, the oil collecting hood is constructed to be integrally formed with the balancing block by using a powder metallurgy process, or the oil collecting hood is formed by stamping and then integrally formed with the balancing block by using a powder metallurgy process.

[0029] In one embodiment of the present disclosure, an oil-slinging cavity is provided on one side of the balancing block adjacent to the oil collecting hood, and an oil-slinging vertical surface is provided on the outer peripheral surface of the oil-slinging cavity; the lubricating oil flowing out of the oil outlet hole is configured to flow through the oil collecting hood, then flow upward to the oil-slinging vertical surface, and continue to flow upward to the thrust surface after flowing through the oil-slinging vertical surface.

[0030] The present disclosure provides a scroll compressor, which at least includes a scroll assembly, a frame, a driving shaft and an oil collecting hood, wherein the scroll assembly includes a movable scroll and a fixed scroll, the movable scroll is arranged below the fixed scroll, and is constructed to form a compression chamber for compressing refrigerant gas between the movable scroll and the fixed scroll, so as to compress the refrigerant gas; the frame includes a main body, the main body is constructed to support the movable scroll, and a thrust surface is formed between the main body and the movable scroll, and an inner cavity is formed in the frame; the driving shaft is constructed to be rotatably arranged on the frame, and the upper end of the driving shaft is located in the inner cavity; the oil collecting hood is arranged in the inner cavity, and is fixedly connected to the upper end of the driving shaft in a direct or indirect manner, and is used to transfer the lubricating oil in the inner cavity to the thrust surface between the frame and the movable scroll under the drive of the driving shaft.

[0031] During the operation of the scroll compressor disclosed in the present invention, the driving shaft can drive the movable scroll of the scroll assembly to rotate relative to the fixed scroll, thereby achieving the purpose of compressing the refrigerant gas. Moreover, when the oil collecting cover is started with the driving shaft, the lubricating oil flowing out of the driving shaft can be directly collected and guided to the thrust surface between the frame and the movable scroll, and the amount of lubricating oil on the thrust surface between the frame and the movable scroll can also meet the requirements.

[0032] It can be seen that compared with the prior art, the scroll compressor disclosed in the present invention can transfer the lubricating oil flowing out of the driving shaft from the slider gap in the inner cavity and directly collect and guide it to the thrust surface between the frame and the movable scroll plate. Compared with stirring the stored oil in the inner cavity by the balancing block, it can effectively increase the speed at which the lubricating oil reaches the thrust surface, and increase the amount of lubricating oil on the thrust surface, thereby preventing wear of the thrust surface, improving the operating reliability of the scroll compressor, and reducing energy consumption losses.

[0033] Moreover, compared with other scroll compressors, the scroll compressor disclosed in the present invention only needs to add an oil collecting cover on the basis of the existing scroll compressor, without the need for major modifications, with low modification difficulty and relatively low modification cost.

[0034] Other features and advantages of the present disclosure will become apparent from the following detailed description of exemplary embodiments of the present disclosure with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0036] Figure 1 is a partial three-dimensional schematic diagram of a scroll compressor provided by an embodiment of the present disclosure;

[0037] Figure 2 is a side perspective schematic diagram of a scroll compressor provided by an embodiment of the present disclosure;

[0038] Figure 3 is a cross-sectional schematic diagram of a scroll compressor provided by an embodiment of the present disclosure;

[0039] Figure 4 is a partial three-dimensional schematic diagram of a scroll compressor provided by an embodiment of the present disclosure;

[0040] Figure 5 is a partial three-dimensional schematic diagram of a scroll compressor provided by an embodiment of the present disclosure;

[0041] Figure 6 is a partial side schematic diagram of a scroll compressor provided by an embodiment of the present disclosure;

[0042] Figure 7 This is a simulation diagram of the distribution of lubricating oil of a scroll compressor in the prior art 0.08 seconds after startup;

[0043] Figure 8 This is a simulation diagram of the distribution of lubricating oil of a scroll compressor in the prior art 0.13 seconds after startup;

[0044] Fig. 9 is a simulation diagram of the distribution of lubricating oil of the scroll compressor disclosed in the present invention 0.08 seconds after startup;

[0045] Fig.10 is a simulation diagram of the distribution of lubricating oil of the scroll compressor disclosed in the present invention 0.13 seconds after startup;

[0046] Fig.11 is a partial three-dimensional schematic diagram of a scroll compressor provided by an embodiment of the present disclosure;

[0047] Fig.12 is a side perspective schematic diagram of a scroll compressor provided by an embodiment of the present disclosure;

[0048] Fig.13 is a cross-sectional schematic diagram of a scroll compressor provided by an embodiment of the present disclosure;

[0049] Fig.14 is a partial three-dimensional schematic diagram of a scroll compressor provided by an embodiment of the present disclosure;

[0050] Fig.15 is a partial side schematic diagram of a scroll compressor provided by an embodiment of the present disclosure;

[0051] Fig.16 is a three-dimensional schematic diagram of another balancing block and an oil collecting cover provided in an embodiment of the present disclosure;

[0052] Fig.17 is another simulation diagram of the distribution of lubricating oil after the scroll compressor is started, provided by an embodiment of the present disclosure;

[0053] Fig.18 This is another motion simulation diagram of the lubricating oil after the scroll compressor is started, provided by an embodiment of the present disclosure.

[0054] Figures 1 to 18 The one-to-one correspondence between the component names and the reference numerals is as follows:

[0055] 10. Orbital scroll; 11. Matching part; 12. Matching cavity; 20. Frame; 21. Inner cavity; 22. Thrust surface; 23. Main body; 24. Connecting arm; 25. Oil drain hole; 30. Drive shaft; 31. Main shaft; 32. Eccentric part; 33. Oil outlet passage; 34. Oil outlet through hole; 40. Oil collecting cover; 41. First end; 42. Second end; 43. Middle section; 44. Slope; 45. Outer wall; 46. Inner wall; 47. Oil storage tank; 50. Balance block; 51. Fixed ring; 52. Counterweight block; 54. Oil throwing cavity; 55. Oil throwing vertical surface; 60. Sliding block. DETAILED DESCRIPTION

[0056] Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangement of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present disclosure unless otherwise specifically stated.

[0057] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present disclosure, its application, or uses.

[0058] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0059] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0060] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0061] In this document, “upper”, “lower”, “front”, “back”, “left”, “right”, etc. are only used to indicate the relative position relationship between related parts, rather than to limit the absolute positions of these related parts.

[0062] In this article, "first", "second", etc. are only used to distinguish each other, and do not indicate the importance and order, or the premise of each other's existence.

[0063] In this document, “equal”, “same”, etc. are not strictly limited in a mathematical and / or geometric sense, but also include errors that can be understood by those skilled in the art and are allowed in manufacturing or use.

[0064] Unless otherwise stated, the numerical ranges herein include not only the entire range within its two endpoints but also include several sub-ranges contained therein.

[0065] The present disclosure provides a scroll compressor, which at least includes a scroll assembly, a frame, a driving shaft and an oil collecting hood, wherein the scroll assembly includes a movable scroll and a fixed scroll, the movable scroll is arranged below the fixed scroll, and is constructed to form a compression chamber for compressing refrigerant gas between the movable scroll and the fixed scroll, so as to compress the refrigerant gas; the frame includes a main body, the main body is constructed to support the movable scroll, and a thrust surface is formed between the main body and the movable scroll, and an inner cavity is formed in the frame; the driving shaft is constructed to be rotatably arranged on the frame, and the upper end of the driving shaft is located in the inner cavity; the oil collecting hood is arranged in the inner cavity, and is fixedly connected to the upper end of the driving shaft in a direct or indirect manner, and is used to transfer the lubricating oil in the inner cavity to the thrust surface between the frame and the movable scroll under the drive of the driving shaft.

[0066] During the operation of the scroll compressor disclosed in the present invention, the driving shaft can drive the movable scroll of the scroll assembly to rotate relative to the fixed scroll, thereby achieving the purpose of compressing the refrigerant gas. Moreover, when the oil collecting cover is started with the driving shaft, the lubricating oil flowing out of the driving shaft can be directly collected and guided to the thrust surface between the frame and the movable scroll, and the amount of lubricating oil on the thrust surface between the frame and the movable scroll can also meet the requirements.

[0067] Compared with the prior art, the scroll compressor disclosed in the present invention can transfer the lubricating oil flowing out of the driving shaft from the slider gap in the inner cavity and directly collect and guide it to the thrust surface between the frame and the movable scroll plate. Compared with stirring the stored oil in the inner cavity by the balancing block, it can effectively increase the speed at which the lubricating oil reaches the thrust surface, and increase the amount of lubricating oil on the thrust surface, thereby preventing wear of the thrust surface, improving the operating reliability of the scroll compressor, and reducing energy consumption losses.

[0068] Moreover, compared with other scroll compressors, the scroll compressor disclosed in the present invention only needs to add an oil collecting cover on the basis of the existing scroll compressor, without the need for major modifications, with low modification difficulty and relatively low modification cost.

[0069] For ease of understanding, refer to Figures 1 to 18 , the specific structure and working principle of the scroll compressor disclosed in the present invention are explained in detail in combination with an embodiment.

[0070] like Figures 1 to 6 As shown, the present disclosure provides a scroll compressor, which at least includes a scroll assembly, a frame 20, a drive shaft 30 and an oil collecting cover 40. The scroll assembly includes an orbiting scroll 10 and a fixed scroll (not shown in the figure), the orbiting scroll 10 is arranged below the fixed scroll, and is configured to form a compression chamber for compressing refrigerant gas between the orbiting scroll and the fixed scroll, so as to compress the refrigerant gas.

[0071] like Figure 1 As shown, the frame 20 includes a main body 23, which is configured to support the movable scroll 10, and a thrust surface 22 is formed between the main body 23 and the movable scroll 10, and an inner cavity 21 is formed in the frame 20; the inner cavity 21 is used to at least accommodate the matching portion 11 of the movable scroll 10, the upper end of the drive shaft 30, and the oil collecting cover 40. Further, in one embodiment of the present disclosure, the frame 20 also includes at least two connecting arms 24, each of which is configured to be arranged in sequence along the circumferential direction on the outer peripheral wall of the main body 23, and each connecting arm 24 is formed by extending radially outward from the main body 23, and the connecting arm 24 is configured to be fixedly connected to the fixed scroll, so that the connecting arm 24 of the frame 20 can support the fixed scroll.

[0072] like Figure 3 As shown, the drive shaft 30 is configured to be rotatably disposed on the frame 20, and the upper end of the drive shaft 30 is located in the inner cavity 21; specifically, the drive shaft 30 includes a main shaft 31 and an eccentric portion 32 that are connected to each other, the eccentric portion 32 is located at the upper end of the main shaft 31, and is located in the inner cavity 21 of the frame 20, and is drivingly connected to the movable scroll 10, the main shaft 31 passes through the frame 20, and is coaxially connected to the motor rotor of the scroll compressor. In this way, when the motor of the scroll compressor is working, the drive shaft 30 can be driven to rotate, thereby driving the movable scroll 10 to rotate relative to the fixed scroll.

[0073] like Figures 4 to 6As shown, the oil collecting hood 40 is disposed in the inner cavity 21 and is fixedly connected to the upper end of the drive shaft 30 in a direct or indirect manner, and is used to transfer the lubricating oil in the inner cavity 21 to the thrust surface 22 between the frame 20 and the movable scroll 10 under the drive of the drive shaft 30. The oil collecting hood 40 is directly fixedly connected to the upper end of the drive shaft 30, which means that the oil collecting hood 40 is directly fixedly connected to the upper end of the drive shaft 30; the oil collecting hood 40 is indirectly fixedly connected to the upper end of the drive shaft 30, which means that the oil collecting hood 40 is fixedly connected to other components, and the other components are fixedly connected to the upper end of the drive shaft 30, so that the oil collecting hood 40 and the drive shaft 30 can remain relatively fixed. It can be understood that the above-mentioned other components can be a single component or multiple components, which are not limited here. During the operation of the scroll compressor disclosed in the present invention, the drive shaft 30 can drive the movable scroll 10 of the scroll assembly to rotate relative to the fixed scroll, thereby achieving the purpose of compressing the refrigerant gas. Moreover, when the oil collecting hood 40 is started with the drive shaft 30, the lubricating oil flowing out from the drive shaft 30 can be quickly collected and guided directly to the thrust surface 22 between the frame 20 and the movable scroll 10, and the amount of lubricating oil on the thrust surface 22 between the frame 20 and the movable scroll 10 can also meet the requirements.

[0074] Specifically, Figure 7 and Figure 8 As shown, during the startup process of the existing scroll compressor, when the drive shaft 30 rotates for 0.08s, the lubricating oil is located at the bottom of the inner cavity 21; when the drive shaft 30 rotates for 0.13s, the lubricating oil still does not reach the thrust surface 22, but the amount of lubricating oil in the inner cavity 21 increases. Fig. 9 and Fig.10 As shown, during the startup process of the scroll compressor of the present invention, when the drive shaft 30 rotates for 0.08s, a large amount of lubricating oil reaches the thrust surface 22; when the drive shaft 30 rotates for 0.13s, a large amount of lubricating oil is already on the thrust surface 22 of the frame 20.

[0075] It can be seen that compared with the prior art, the scroll compressor disclosed in the present invention can transfer the lubricating oil flowing out of the drive shaft 30 from the gap of the slider 60 in the inner cavity 21 and collect and guide it directly to the thrust surface 22 between the frame 20 and the movable scroll 10. Compared with stirring the stored oil in the inner cavity 21 by the balance block 50, it can effectively increase the speed at which the lubricating oil reaches the thrust surface 22, and increase the amount of lubricating oil on the thrust surface 22, prevent the wear of the thrust surface 22, improve the operating reliability of the scroll compressor, and reduce energy consumption losses. Moreover, compared with other scroll compressors, the scroll compressor disclosed in the present invention only needs to add an oil collecting cover 40 on the basis of the existing scroll compressor, without the need for major modifications, with low difficulty and relatively low modification costs.

[0076] Specifically, Figure 3As shown, in one embodiment of the present disclosure, a matching portion 11 is provided at the bottom of the movable scroll 10, and the matching portion 11 is configured to extend downward into the inner cavity 21, and a matching cavity 12 is formed at the bottom. A slider 60 matching the contour of the eccentric portion 32 is sleeved on the eccentric portion 32 at the upper end of the drive shaft 30, and the slider 60 is fixedly disposed in the matching cavity 12, and the eccentric portion 32 is configured to rotate with the movable scroll 10 through the slider 60. In this way, during the rotation process of the drive shaft 30 of the present disclosure, it can only have radial flexibility, and the processing error of the eccentric portion 32 and the radial error generated by the assembly between the eccentric portion 32 and the movable scroll 10 can be effectively offset by the slider 60, and the gyration radius of the eccentric portion 32 can be automatically adjusted, and the wear of the eccentric portion 32 during the working process can be automatically compensated.

[0077] Among them, Figure 3 and Figure 4 As shown, in one embodiment of the present disclosure, an oil outlet passage 33 is provided in the drive shaft 30, and an oil outlet through hole 34 of the oil outlet passage 33 is provided on the top surface of the eccentric portion 32. In this way, during the operation of the scroll compressor of the present disclosure, the lubricating oil can flow along the oil outlet passage 33 and flow out from the oil outlet through hole 34 on the top surface of the eccentric portion 32, and then flow downward from the gap between the eccentric portion 32 and the slider 60, and the gap between the slider 60 and the movable scroll 10, and then flow out from the matching cavity 12 of the movable scroll 10.

[0078] like Figure 5 As shown, in one embodiment of the present disclosure, the oil collecting cover 40 is configured to be arranged on a side adjacent to the oil outlet through hole 34, and a receiving surface is provided on the oil collecting cover 40, and the height of the receiving surface is configured to be lower than the bottom surface height of the matching cavity 12. In this way, during the rotation of the drive shaft 30, when the lubricating oil flows out from the oil outlet through hole 34 on the top surface of the eccentric portion 32, it can flow to the side where the oil collecting cover 40 is located under the action of centrifugal force, and then flow downward; moreover, after the lubricating oil flows downward from the matching cavity 12 of the movable scroll 10, the lubricating oil can fall on the receiving surface of the oil collecting cover 40, and then under the action of the oil collecting cover 40, it flows to the thrust surface 22 between the frame 20 and the movable scroll 10 as soon as possible, and increases the amount of lubricating oil on the thrust surface 22 to ensure the lubrication effect.

[0079] like Figure 5 and Fig.14As shown, in one embodiment of the present disclosure, an outer wall 45 is provided on the circumferential outer side of the oil collecting hood 40, and the outer wall 45 is configured to receive at least part of the lubricating oil flowing out from the oil outlet through hole 34 in the radial direction, and to prevent at least part of the lubricating oil on the receiving surface from being thrown out from the receiving surface under the action of centrifugal force. By providing the outer wall 45 on the circumferential outer side of the oil collecting hood 40, it can be ensured that at least part of the lubricating oil falling on the oil collecting hood 40 can be received by the outer wall 45 in the process of flowing radially outward under the action of centrifugal force, and will not be directly thrown out into the inner cavity 21, but will first flow onto the outer wall 45 and then fall onto the receiving surface, and then flow onto the thrust surface 22 under the action of the oil collecting hood 40, thereby lubricating the thrust surface 22 to ensure lubrication of the thrust surface 22.

[0080] Moreover, since the oil collecting cover 40 is constructed to be arranged on a side adjacent to the oil outlet hole 34, after the lubricating oil flows out from the oil outlet hole 34, it can flow toward the side where the oil collecting cover 40 is located under the action of centrifugal force, and then be received by the outer wall 45 to avoid falling directly into the inner cavity 21, thereby increasing the amount of lubricating oil reaching the thrust surface 22.

[0081] Furthermore, in one embodiment of the present disclosure, the oil collecting hood 40 is constructed to cover an angle range of 30° to 180° on the cross section of the scroll compressor. This can ensure that after the lubricating oil flows out of the oil outlet hole 34, more lubricating oil can be received by the outer wall 45 of the oil collecting hood 40, preventing most of the lubricating oil from falling directly into the inner cavity 21, thereby ensuring that the amount of lubricating oil reaching the thrust surface 22 can meet the requirements.

[0082] Among them, Figure 5 As shown, in one embodiment of the present disclosure, the scroll compressor of the present disclosure further includes a balancing block 50, which is disposed at the upper end of the drive shaft 30 and is configured to provide a reverse torque to balance the dynamic unbalance generated when the eccentric portion 32 drives the orbiting scroll 10 to rotate.

[0083] During the operation of the scroll compressor, the eccentric portion 32 generates centrifugal torque during the rotation process. In this way, in order to avoid periodic vibration during the operation of the scroll compressor disclosed in the present invention, a balancing block 50 can be provided at the upper end of the drive shaft 30. The balancing block 50 can provide a reverse torque to balance the dynamic unbalance generated when the eccentric portion 32 drives the movable scroll 10 to rotate. Since the oil collecting hood 40 is fixedly arranged on the balancing block 50, it can ensure that the oil collecting hood 40 can be driven to rotate when the drive shaft 30 rotates, and the oil collecting hood 40 and the balancing block 50 can play a balancing role together.

[0084] Specifically, Figure 5As shown, in one embodiment of the present disclosure, the balancing block 50 includes a fixed ring 51 and a counterweight 52, the fixed ring 51 is constructed to be fixedly mounted on the drive shaft 30 of the scroll compressor; the counterweight 52 is constructed to be connected to the fixed ring 51, and the fixed ring 51 and the counterweight 52 are engaged through matching serrated surfaces; the oil collecting cover 40 is constructed to be fixedly set on the counterweight 52, and is balanced together with the fixed ring 51 and the counterweight 52 to balance the dynamic imbalance generated when the eccentric portion 32 drives the movable scroll 10 to rotate.

[0085] In this way, the scroll compressor disclosed in the present invention uses a split balancing block 50, and the fixed ring 51 and the counterweight 52 of the split balancing block 50 are engaged through matching serrated surfaces, which increases the contact area between the fixed ring 51 and the counterweight 52, and enhances the connection strength between the two. Even when the balancing block 50 is subjected to a large centrifugal force, the integrity of the split balancing block 50 can be guaranteed, effectively reducing the stress level, improving the ability to resist centrifugal force, and ensuring the working reliability of the scroll compressor. In addition, the oil collecting cover 40 is balanced together with the fixed ring 51 and the counterweight 52 to balance the dynamic unbalance generated when the eccentric part 32 drives the movable scroll 10 of the scroll assembly to rotate, so as to prevent vibration and noise generated when the oil collecting cover 40 rotates during the process of the scroll compressor disclosed in the present invention.

[0086] In another embodiment of the present disclosure, the balancing block 50 may also be an integrated balancing block 50, and the oil collecting cover 40 and the integrated balancing block 50 are balanced together to balance the dynamic imbalance generated when the eccentric portion 32 drives the movable scroll plate 10 of the scroll assembly to rotate, and can also prevent vibration and noise from being generated when the oil collecting cover 40 rotates during the process of the scroll compressor of the present disclosure.

[0087] Further, in one embodiment of the present disclosure, the oil collecting hood 40 can be balanced together with the lubricating oil collected and guided, the fixed ring 51, the counterweight 52 or the integrated balancing block 50. It can be understood that during the operation of the scroll compressor of the present disclosure, part of the lubricating oil will continue to exist on the oil collecting hood 40, and this part of the lubricating oil also has a certain mass, which will cause a certain amount of dynamic imbalance to the rotation of the drive shaft 30 through the oil collecting hood 40. Therefore, the oil collecting hood 40 can be balanced together with the lubricating oil collected and guided, the fixed ring 51, the counterweight 52 or the integrated balancing block 50 to balance the dynamic imbalance generated when the eccentric part 32 drives the movable scroll 10 of the scroll assembly to rotate, so as to avoid vibration and noise generated by the oil collecting hood 40 of the present disclosure when rotating.

[0088] Specifically, various methods such as actual machine experiments or electronic simulations can be used to balance the oil collecting hood 40 and the lubricating oil it collects and guides, the fixed ring 51, the counterweight 52 or the integrated balancing block 50, so as to balance the dynamic imbalance generated when the eccentric portion 32 drives the movable scroll plate 10 of the scroll assembly to rotate, so as to avoid vibration and noise generated by the oil collecting hood 40 of the present disclosure when it rotates, which is not limited here.

[0089] It is understandable that after the lubricating oil flowing out of the oil outlet hole 34 reaches the inner cavity 21, not all of it will flow to the thrust surface 22 between the frame 20 and the orbiting scroll 10. This part of the lubricating oil is also needed to lubricate other parts of the scroll compressor. Figure 2 and Figure 3 As shown, in one embodiment of the present disclosure, an oil drain hole 25 is provided on the side wall of the inner cavity 21, and part of the lubricating oil in the inner cavity 21 is constructed to flow out of the inner cavity 21 through the oil drain hole 25; the height of the receiving surface is constructed to be higher than the height of the oil drain hole 25.

[0090] In this way, after the lubricating oil flows downward from the matching cavity 12 of the movable scroll 10, part of the lubricating oil can fall on the receiving surface of the oil collecting cover 40, and then, under the action of the oil collecting cover 40, it flows to the thrust surface 22 between the frame 20 and the movable scroll 10 as quickly as possible, and increases the amount of lubricating oil on the thrust surface 22 to ensure the lubrication effect. Part of the lubricating oil flows into the inner cavity 21 and flows out from the oil drain hole 25 on the side wall of the inner cavity 21.

[0091] Among them, Figure 3 As shown, it can be understood that, compared with the existing scroll compressor, in the scroll compressor disclosed in the present invention, since the oil collecting cover 40 is used to improve the lubrication effect on the thrust surface 22, there is no need for the balance block 50 to knock up the lubricating oil in the inner cavity 21 of the frame 20, and the oil drain hole 25 can be set close to the bottom of the inner cavity 21, thereby reducing the amount of permanent lubricating oil in the inner cavity 21 of the frame 20. Since the amount of permanent lubricating oil in the inner cavity 21 of the frame 20 is greatly reduced, the power consumption during the rotation of the balance block 50 can be reduced, thereby effectively improving the efficiency of the scroll compressor disclosed in the present invention. Specifically, as Figure 2 As shown, the oil drain hole 25 is arranged between two adjacent connecting arms 24. In this way, the oil drain hole 25 does not need to penetrate the connecting wall, thereby effectively reducing the actual length of the oil drain hole 25 and reducing the processing cost.

[0092] like Figure 4 As shown, in one embodiment of the present disclosure, the oil collecting cover 40 is configured to be arranged on the front side of the counterweight 52 in the rotation direction. In this way, during the operation of the scroll compressor of the present disclosure, it can be ensured that the lubricating oil moves upward to the thrust surface 22 under the action of the ramp surface 44, thereby increasing the amount of lubricating oil reaching the thrust surface 22.

[0093] like Figure 5 and Figure 6 As shown, in one embodiment of the present disclosure, the front end of the oil collecting hood 40 in the rotation direction is the first end 41, and the rear end in the rotation direction is the second end 42; the second end 42 of the oil collecting hood 40 is fixedly arranged on the balancing block 50, and the height of the first end 41 is lower than the height of the second end 42, and the first end 41 and the second end 42 are transitioned by a slope 44, and the first end 41 is constructed to serve as a receiving surface, and the lubricating oil flowing out from the oil outlet through hole 34 to the first end 41 is configured to flow upward to the thrust surface 22 when flowing through the slope 44.

[0094] In this way, after the lubricating oil flows downward from the mating cavity 12 of the movable scroll 10 and falls on the first end 41 of the oil collecting cover 40, it will flow toward the second end 42 under the action of inertia. Since the height of the first end 41 is lower than the height of the second end 42, and the first end 41 and the second end 42 are transitioned by the slope 44, the lubricating oil can fly upward when flowing through the slope 44, and then fall on the thrust surface 22 at the upper end of the frame 20, thereby lubricating the thrust surface 22.

[0095] And similar, such as Figures 11 to 15 As shown, in another embodiment of the present disclosure, the front end of the oil collecting cover 40 in the rotation direction is the first end 41, the rear end in the rotation direction is the second end 42, and the portion between the first end 41 and the second end 42 is the middle section 43; the first end 41 and the second end 42 of the oil collecting cover 40 are both fixedly arranged on the balance block 50, and the height of the middle section 43 is lower than the height of the second end 42, and the middle section 43 and the second end 42 are transitioned by a slope 44, and the middle section 43 is constructed as a receiving surface, and the lubricating oil flowing out from the oil outlet through hole 34 to the middle section 43 is configured to flow upward to the thrust surface 22 when flowing through the slope 44. Specifically, Figures 13 to 15 The first end 41 and the second end 42 of the oil collecting cover 40 are on the counterweight 52. Figures 13 to 15 The counterweight 52 is not shown.

[0096] In this way, after the lubricating oil flows downward from the matching cavity 12 of the movable scroll 10 and falls on the middle section 43 of the oil collecting cover 40, it will flow toward the second end 42 under the action of inertia. Since the height of the middle section 43 is lower than the height of the second end 42, and there is a slope 44 between the middle section 43 and the second end 42, the lubricating oil can fly upward when flowing through the slope 44, and then fall on the thrust surface 22 at the upper end of the frame 20, thereby lubricating the thrust surface 22.

[0097] Compared with the oil collecting hood 40 fixed at only one end, the oil collecting hood 40 fixed at both ends has a higher fixing strength and is less likely to shake than the drive shaft 30 during operation; however, the oil collecting hood 40 fixed at only one end has a lower overall weight, which can reduce the rotational power consumption of the drive shaft 30 and save processing raw materials.

[0098] Specifically, Figure 5 As shown, in one embodiment of the present disclosure, the slope 44 may be a straight slope, and in another embodiment of the present disclosure, as shown Fig.14 As shown, the ramp 44 may also be a smooth curved surface. Whether the ramp 44 is a straight inclined surface or a smooth curved surface, it is sufficient to ensure that the lubricating oil can fly upward when flowing through the ramp 44 to fall on the thrust surface 22 at the upper end of the frame 20.

[0099] It is understandable that if Fig.15 As shown, in one embodiment of the present disclosure, the height of the middle section 43 is lower than the height of the first end 41, and the middle section 43 and the first end 41 are transitioned by a slope 44. In this way, the first end 41 and the second end 42 of the oil collecting cover 40 are both higher than the middle section 43, which can facilitate the middle section 43 to receive lubricating oil and the oil collecting cover 40 to be installed on the counterweight 52.

[0100] Further, such as Figure 6 and Fig.15 As shown, in one embodiment of the present disclosure, the outer wall 45 is constructed to continuously increase in height from the first end 41 to the direction where the second end 42 is located. It can be understood that, as described above, the lubricating oil that falls on the oil collecting hood 40 moves toward the second end 42 under the action of inertia, so the outer wall 45 that plays a blocking role is mainly the outer wall 45 on the side of the second end 42. In this way, since the outer wall 45 continuously increases in height from the first end 41 to the direction where the second end 42 is located, it can not only ensure the blocking effect of the outer wall 45, but also reduce the overall weight of the oil collecting hood 40, thereby reducing the rotation power consumption of the drive shaft 30.

[0101] like Fig.14 and Fig.15 As shown, in one embodiment of the present disclosure, an inner wall 46 is provided on the circumferential inner side of the oil collecting hood 40, and the top height of the inner wall 46 is constructed to be lower than the bottom height of the mating cavity 12, and together with the outer wall 45 and the receiving surface, an oil storage groove 47 is formed to allow part of the lubricating oil to remain in the oil storage groove 47 during the operation of the scroll compressor.

[0102] Since the inner wall 46, the outer wall 45 and the receiving surface together form an oil storage groove 47, after the lubricating oil flows downward from the matching cavity 12 of the movable scroll 10, it will fall into the oil storage groove 47 of the oil collecting cover 40, and flow toward the second end 42 under the action of inertia in the oil storage groove 47, and then fly upward and fall on the thrust surface 22 at the upper end of the frame 20 when flowing through the slope surface 44, thereby lubricating the thrust surface 22. By providing the oil storage groove 47 on the oil collecting cover 40, it is possible to prevent the lubricating oil that falls on the oil collecting cover 40 from flowing down from the oil collecting cover 40 quickly, thereby ensuring the amount of lubricating oil that reaches the thrust surface 22.

[0103] It is understandable that in the scroll compressor disclosed in the present invention, the ratio of the two parts of lubricating oil reaching the thrust surface 22 and flowing out from the oil drain hole 25 can be effectively adjusted by designing the shape of the oil collecting cover 40, thereby ensuring the lubrication effect on the thrust surface 22 and the lubrication effect on other structures.

[0104] like Fig.16 As shown, in another embodiment of the present disclosure, an oil-slinging cavity 54 is provided on one side of the balancing block 50 adjacent to the oil collecting cover 40, and an oil-slinging vertical surface 55 provided along the vertical direction is provided on the outer peripheral surface of the oil-slinging cavity 54; the lubricating oil flowing out of the oil outlet through hole 34 is configured to flow through the oil collecting cover 40, then flow upward to the oil-slinging vertical surface 55, and then flow through the oil-slinging vertical surface 55 and continue to flow upward to the thrust surface 22. Specifically, the oil-slinging cavity 54 is a hollowed-out area formed on the balancing block 50, and the oil-slinging cavity 54 can be processed simultaneously when the balancing block 50 is integrally formed, or can be processed separately after the balancing block 50 is integrally processed.

[0105] like Fig.17 As shown, during the operation of the scroll compressor of the present disclosure, after the lubricating oil flows out from the oil outlet hole 34, it will first be collected on the oil collecting cover 40, and then as shown in FIG. Fig.18 As shown, after the lubricating oil impacts the oil collecting cover 40, part of the lubricating oil will continue to flow upward along the oil collecting cover 40 into the oil throwing chamber 54, and impact the oil throwing vertical surface 55 of the oil throwing chamber 54, and then continue to flow upward along the oil throwing vertical surface 55 until it flows to the thrust surface 22.

[0106] like Fig.18 As shown, it can be known through simulation tests that by adding the oil-slinging chamber 54 to the balancing block 50 of the present disclosure, it can make it easier for the lubricating oil to reach the thrust surface 22, and further increase the amount of lubricating oil reaching the thrust surface 22 between the frame 20 and the orbiting scroll 10.

[0107] Specifically, the processing technology of the oil collecting hood 40 of the present disclosure can be selected as needed. In one embodiment of the present disclosure, when the oil collecting hood 40 of the present disclosure is a stamped metal part, it can not only reduce the overall weight of the oil collecting hood 40 and reduce the required materials, but also improve the overall strength and processing accuracy of the oil collecting hood 40.

[0108] In another embodiment of the present disclosure, the oil collecting hood 40 of the present disclosure may also be a plastic part, which may be made by injection molding, molding, extrusion and other processes. When the oil collecting hood 40 of the present disclosure is a plastic part, the overall weight of the oil collecting hood 40 may also be reduced, and the processing cost may be reduced.

[0109] In another embodiment of the present disclosure, the oil collecting hood 40 of the present disclosure is constructed to be integrally formed with the balancing block 50. It is understandable that the balancing block 50 in the scroll compressor of the present disclosure is mostly made of metal materials. When the oil collecting hood 40 of the present disclosure is integrally formed with the balancing block 50, the oil collecting hood 40 is also made of the same material as the balancing block 50. Since the oil collecting hood 40 of the present disclosure is integrally formed with the balancing block 50, not only is it unnecessary to open a fixing hole on the balancing block 50, the fixing process of the oil collecting hood 40 can also be omitted, and the fixing strength between the oil collecting hood 40 and the balancing block 50 can also be effectively improved.

[0110] Furthermore, in one embodiment of the present disclosure, the oil collecting hood 40 is constructed to be integrally formed with the balance block 50 using a powder metallurgy process. When the oil parts of the oil collecting hood 40 are integrally formed with the balance block 50 using a powder metallurgy process, it can not only effectively save metal materials and reduce costs, but also improve the overall strength and reduce the amount of subsequent machining.

[0111] In another embodiment of the present disclosure, the oil collecting hood 40 is formed by stamping and then integrally formed with the balance block 50 by powder metallurgy. That is, the oil collecting hood 40 of the present disclosure is firstly produced by stamping, and then the oil collecting hood 40 and the raw material powder are placed together in a mold required for the processing of the balance block 50, and after the oil collecting hood 40 and the balance block 50 are formed into one piece by processes such as press molding, the final product is obtained by sintering and other processes. Since the oil collecting hood 40 is formed by stamping and then integrally formed with the balance block 50 by powder metallurgy, not only can two different materials be made into an integrally formed finished product, but also the advantages of stamping and powder metallurgy can be combined to save metal materials, reduce processing costs, and improve overall strength and reduce the amount of subsequent machining.

[0112] The embodiments of the present disclosure have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The choice of terms used herein is intended to best explain the principles of the embodiments, practical applications, or technical improvements in the marketplace, or to enable other persons of ordinary skill in the art to understand the embodiments disclosed herein. The scope of the present disclosure is defined by the appended claims.

Claims

1. A scroll compressor, characterized in that: include: A scroll assembly, the scroll assembly comprising an orbiting scroll (10) and a fixed scroll, the orbiting scroll (10) being arranged below the fixed scroll and being configured to form a compression chamber for compressing refrigerant gas between the orbiting scroll and the fixed scroll, so as to compress the refrigerant gas; A frame (20), the frame (20) comprising a main body (23), the main body (23) being configured to support the movable scroll (10), a thrust surface (22) being formed between the main body (23) and the movable scroll (10), and an inner cavity (21) being formed in the frame (20); A drive shaft (30), the drive shaft (30) being configured to be rotatably disposed on the frame (20), and the upper end of the drive shaft (30) being located in the inner cavity (21); An oil collecting hood (40) is disposed in the inner cavity (21) and is fixedly connected to the upper end of the drive shaft (30) in a direct or indirect manner, and is used to collect and guide lubricating oil flowing out of the drive shaft (30) directly to the thrust surface (22) between the frame (20) and the movable scroll (10) under the drive of the drive shaft (30).

2. The scroll compressor according to claim 1, characterized in that: An oil outlet passage (33) is provided in the driving shaft (30), and an oil outlet through hole (34) of the oil outlet passage (33) is provided on the top surface of the eccentric portion (32) of the driving shaft (30); the oil collecting hood (40) is configured to be provided on a side adjacent to the oil outlet through hole (34), and a receiving surface is provided on the oil collecting hood (40), and the height of the receiving surface is configured to be lower than the bottom surface height of the matching cavity (12) at the bottom of the movable scroll (10).

3. The scroll compressor according to claim 2, characterized in that: An outer wall (45) is provided on the circumferential outer side of the oil collecting cover (40), and the outer wall (45) is configured to receive at least part of the lubricating oil flowing out of the oil outlet hole (34) in a radial direction, so as to prevent at least part of the lubricating oil on the receiving surface from being thrown out from the receiving surface under the action of centrifugal force.

4. The scroll compressor according to claim 3, characterized in that: The oil collecting cover (40) is configured to cover an angle ranging from 30° to 180° on a cross section of the scroll compressor.

5. The scroll compressor according to claim 2, characterized in that: The front end of the oil collecting cover (40) in the rotation direction is a first end (41), and the rear end in the rotation direction is a second end (42); The height of the first end (41) of the oil collecting cover (40) is lower than the height of the second end (42), and a slope (44) transitions between the first end (41) and the second end (42). The first end (41) is constructed to serve as the receiving surface, and the lubricating oil flowing out from the oil outlet hole (34) to the first end (41) is configured to flow upward onto the thrust surface (22) when flowing through the slope (44).

6. The scroll compressor according to claim 5, characterized in that: The invention also includes a balancing block (50), which is arranged at the upper end of the driving shaft (30) and is configured to provide a reverse torque to balance the dynamic imbalance generated when the eccentric portion (32) drives the movable scroll (10) to rotate; and the oil collecting hood (40) is configured to be fixedly arranged on the balancing block (50).

7. The scroll compressor according to claim 6, characterized in that: The balancing block (50) comprises a fixing ring (51) and a counterweight (52), wherein the fixing ring (51) is configured to be fixedly sleeved on the drive shaft (30) of the scroll compressor; the counterweight (52) is configured to be connected to the fixing ring (51), and the fixing ring (51) and the counterweight (52) are engaged through matching serrated surfaces; The oil collecting cover (40) is configured to be fixedly disposed on the counterweight (52) and to be balanced together with the fixing ring (51) and the counterweight (52) to balance the dynamic imbalance generated when the eccentric portion (32) drives the movable scroll (10) to rotate.

8. The scroll compressor according to claim 7, characterized in that: The front end of the oil collecting cover (40) in the rotation direction is a first end (41), the rear end in the rotation direction is a second end (42), and the portion between the first end (41) and the second end (42) is a middle section (43); The first end (41) and the second end (42) of the oil collecting cover (40) are both fixedly arranged on the balancing block (50), and the height of the middle section (43) is lower than the height of the second end (42), and a slope (44) transitions between the middle section (43) and the second end (42), and the middle section (43) is constructed to serve as the receiving surface, and the lubricating oil flowing out from the oil outlet hole (34) to the middle section (43) is configured to flow upward to the thrust surface (22) when flowing through the slope (44).

9. The scroll compressor according to claim 7, characterized in that: The slope (44) of the oil collecting cover (40) is configured to be disposed on the front side of the counterweight (52) in the rotation direction.

10. The scroll compressor according to claim 3, characterized in that: An inner wall (46) is provided on the circumferential inner side of the oil collecting cover (40), and the top height of the inner wall (46) is constructed to be lower than the bottom height of the matching cavity (12), and together with the outer wall (45) and the receiving surface, an oil storage groove (47) is formed to allow part of the lubricating oil to remain in the oil storage groove (47) during the operation of the scroll compressor.

11. The scroll compressor according to claim 6, characterized in that: The oil collecting cover (40) is a stamped metal part or a plastic part.

12. The scroll compressor according to claim 6, characterized in that: The oil collecting cover (40) is configured to be integrally formed with the balancing weight (50).

13. The scroll compressor according to claim 6, characterized in that: The oil collecting hood (40) is constructed to be integrally formed with the balancing block (50) by using a powder metallurgy process, or the oil collecting hood (40) is integrally formed with the balancing block (50) by using a powder metallurgy process after being formed by stamping.

14. The scroll compressor according to claim 6, characterized in that: An oil-slinging cavity (54) is provided on one side of the balancing block (50) adjacent to the oil collecting cover (40), and an oil-slinging vertical surface (55) arranged in a vertical direction is provided on the outer peripheral surface of the oil-slinging cavity (54); The lubricating oil flowing out of the oil outlet through hole (34) is configured to flow through the oil collecting cover (40), then flow upward to the oil throwing vertical surface (55), and then continue to flow upward to the thrust surface (22) after flowing through the oil throwing vertical surface (55).

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