Scroll member and scroll compressor

Abstract

The invention provides a scroll component and a scroll compressor. The scroll component comprises an end plate, a plurality of end plates and a plurality of end plates, a scroll blade in a spiral shape and formed on one side surface of the end plate; the outer peripheral wall is arranged to extend in the axial direction from the outer peripheral edge of the end plate and surround the scroll blade, an air inlet channel is formed between the outer peripheral wall and the scroll blade, an air suction window which penetrates through the outer peripheral wall to communicate the air inlet channel with the outside of the scroll part is formed in the outer peripheral wall, and a flow guide groove is formed in the air suction window; the flow guide groove is configured to guide working fluid flowing through the air suction window so that the working fluid can enter the air inlet channel in the direction approximately tangent to the extending direction of the air inlet channel. According to the scroll component and the scroll compressor, the air inlet efficiency can be improved, and the scroll component and the scroll compressor are easy to manufacture and low in cost.

Description

TECHNICAL FIELD

[0001] The present application relates to a scroll member, and more particularly, to a fixed scroll having a double suction window design. In addition, the present application also relates to a scroll compressor including the scroll member. BACKGROUND

[0002] A scroll compressor includes a compression mechanism composed of an orbiting scroll and a fixed scroll. The orbiting scroll and the fixed scroll each include an end plate and spiral wrap blades that are spread in opposite wrap directions (clockwise and counterclockwise), and are engaged with each other to define a plurality of compression chambers between the orbiting scroll and the fixed scroll.

[0003] Generally, working fluid enters the compression mechanism through a single suction window formed in the fixed scroll, and flows into effective wrap chambers formed by the wrap blades after passing through an intake passage in the fixed scroll. On one hand, the intake passage is usually long, for example, extending more than 100° along the circumferential direction of the fixed scroll, thus causing pressure loss of the working fluid. On the other hand, the intake amount of the suction window and the flow rate of the working fluid are also limited by the area of the suction window. In addition, the working fluid also experiences a flow direction change when entering the intake passage through the suction window, thus reducing the suction efficiency.

[0004] Therefore, there is a need for an improvement to the suction window of a scroll member, so as to effectively reduce the intake pressure loss of the scroll member and increase the scroll intake flow rate. SUMMARY

[0005] In this section, a general summary of the application is provided, but not a comprehensive disclosure of the full scope or all features of the application.

[0006] One of the objects of the present application is to provide a scroll member and a scroll compressor including the same, the scroll member having a flow guide groove formed at a suction window to guide working fluid to enter an intake passage in a direction substantially tangent to the extension direction of the intake passage, thus reducing the intake pressure loss.

[0007] Another object of the present application is to provide a scroll member and a scroll compressor including the same, the scroll member including at least two suction windows, which not only can reduce the intake pressure loss by shortening the intake passage, but also can increase the intake area and provide the intake efficiency.

[0008] According to an aspect of the present application, there is provided a scroll member, including: an end plate; scroll vanes spirally formed on a side surface of the end plate; and an outer peripheral wall provided to extend in an axial direction from an outer periphery of the end plate and to surround the scroll vanes, the outer peripheral wall and the scroll vanes forming an intake passage therebetween, wherein the outer peripheral wall is formed with a suction window penetrating the outer peripheral wall to communicate the intake passage with an outside of the scroll member, and a flow guide groove is formed at the suction window and configured to guide working fluid flowing through the suction window so as to enter the intake passage in a direction substantially tangential to an extending direction of the intake passage.

[0009] Optionally, the scroll vanes include a central end located at a central region of the end plate and a distal end opposite to the central end in a spiral profile direction, the suction window includes a first end portion and a second end portion opposite to each other in the extending direction of the intake passage, the second end portion being closer to the distal end than the first end portion, and the flow guide groove extends from the first end portion to the second end portion.

[0010] Optionally, the suction window is configured by a recess formed by being recessed from an axial free end surface of the outer peripheral wall toward the end plate in the axial direction, the outer peripheral wall includes a window wall portion overlapping the recess in the axial direction, the window wall portion includes an axial surface facing away from the end plate and a radially inner surface facing inward, and the flow guide groove is partially formed at the axial surface and partially formed at the radially inner surface.

[0011] Optionally, the flow guide groove is formed by cutting a portion of the axial surface and cutting a portion of the radially inner surface.

[0012] Optionally, the flow guide groove has a guide surface which, in a cross section perpendicular to a circumferential direction, is in a curved shape projecting toward a radially outer side.

[0013] Optionally, the scroll vanes include a central end located at a central region of the end plate and a distal end opposite to the central end in a spiral profile direction, the guide surface includes a cut-off end close to the distal end in the extending direction of the intake passage and a start end opposite to the cut-off end, and in a cross section perpendicular to the axial direction, a radial width of the cut-off end of the guide surface is smaller than a radial width of the start end.

[0014] Optionally, in the cross section perpendicular to the axial direction, the radial width of the start end is substantially equal to a radial width of the suction window.

[0015] Optionally, the outer peripheral wall is further formed with a flow straightening groove at a connection of the flow guide groove with the intake passage.

[0016] Optionally, the flow straightening groove is formed by recessing the guide surface of the flow guide groove toward the end plate in the axial direction or protruding the guide surface away from the end plate in the axial direction.

[0017] Optionally, the rectification groove is configured as a plurality and arranged at intervals along the extension direction of the gas inlet passage.

[0018] Optionally, the scroll component includes at least two suction windows arranged at intervals along the extension direction of the gas inlet passage.

[0019] Optionally, the guide groove is provided at the suction window adjacent to the scroll cavity formed by the scroll vane among the at least two suction windows.

[0020] Optionally, the scroll component is a fixed scroll for a scroll compressor.

[0021] According to another aspect of the present application, there is provided a scroll compressor, wherein the scroll compressor includes the scroll component as above.

[0022] In general, the scroll component according to the present application and the scroll compressor including the same bring at least one of the following beneficial effects: due to the scroll component being provided with at least two suction windows, one of which is closer to the effective cavity of the scroll relative to the other, the gas inlet area is increased, the gas inlet flow is increased, the length of the gas inlet passage is reduced, the gas inlet pressure loss is reduced, and the gas inlet efficiency is improved; in addition, the guide groove with smooth transition is provided at the suction window, thereby guiding the working fluid entering the scroll, reducing the flow direction change of the working fluid entering the scroll, and improving the suction efficiency; in addition, the rectification groove (or rectification tooth) can be provided at the end of the guide groove, which scatters the falling vortex when the working fluid falls off from the guide groove, reduces the internal energy dissipation of the fluid, reduces the flow pressure loss, and further improves the suction efficiency of the scroll. BRIEF DESCRIPTION OF DRAWINGS

[0023] The features and advantages of one or more embodiments of the present application will become more apparent from the following detailed description, taken in conjunction with the accompanying drawings. The drawings provided herein are for illustration purposes only and are not intended to limit the scope of the application in any way. The drawings are not drawn to scale and some features can be exaggerated to show details of particular components. In the drawings:

[0024] Figure 1 is a perspective view of a scroll component (fixed scroll) according to a first embodiment of the present application;

[0025] Figure 2 is a partial perspective view of a suction window portion of the scroll component according to the first embodiment of the present application, in which a cross section of the suction window perpendicular to the circumferential direction is shown;

[0026] Figure 3 is a bottom view of the suction window portion of the scroll component according to the first embodiment of the present application;

[0027] Figure 4 is a perspective view of a scroll member (fixed scroll) according to a second embodiment of the present application;

[0028] Figure 5 is a partial perspective view of a suction port portion of a scroll member according to the second embodiment of the present application, in which a cross section of the suction port perpendicular to the circumferential direction is shown; and

[0029] Figure 6 is a perspective view of a scroll member (fixed scroll) of a comparative example. DETAILED DESCRIPTION

[0030] The preferred embodiments of the present application will be described herein below with reference to the accompanying drawings, which are by way of illustration only and thus are not intended to be limiting in accordance with the present application and applications thereof. In particular, the preferred embodiments of the present application are described herein by way of example with the fixed scroll provided with a suction port.

[0031] A scroll compressor mainly includes a housing, a compression mechanism, and a drive shaft, a motor (not shown in the drawings), etc. for driving the compression mechanism. The compression mechanism includes a fixed scroll member (hereinafter also referred to as fixed scroll) and an orbiting scroll member (hereinafter also referred to as orbiting scroll). As shown in Figure 1 In the first embodiment of the present application according to the fixed scroll 100a, the fixed scroll 100a can include an end plate 10, spiral wrap blades 12 formed on one side surface of the end plate 10, and an outer peripheral wall 14 extending in the axial direction from the outer periphery of the end plate 10 and surrounding the wrap blades 12. That is, the wrap blades 12 and the outer peripheral wall 14 extend in the axial direction from the same side surface of the end plate 10. The orbiting scroll (not shown) includes an end plate and spiral wrap blades formed on one side surface of the orbiting scroll end plate. The wrap blades 12 of the fixed scroll 100a and the wrap blades of the orbiting scroll engage with each other, thereby forming a series of compression chambers with varying volumes between them to achieve compression of the working fluid.

[0032] As shown in Figure 1 The wrap blades 12 of the fixed scroll 100a extend in the spiral line direction to the central region of the fixed scroll 100a. The wrap blades 12 include a central end 121 located in the central region of the end plate 10 and a distal end 122 opposite the central end 121 in the spiral line direction. For the fixed scroll 100a, the wrap blades 12 form scroll-type cavities (effective cavities) for compression, in other words, the scroll-type cavities are defined between the scroll blades 12 and from the distal end 122 of the wrap blades 12 toward the center of the end plate 10 to the exhaust port 16 (see Figure 6) extends. The outer peripheral wall 14 is located at the outer periphery of the scroll blade 12, a part of the radially inner surface of which is in contact with the scroll blade 12, and another part of the radially inner surface of which forms the suction passage SP with the scroll blade 12. In other words, a part of the radially inner surface of the outer peripheral wall 14 in the circumferential direction is used to process the section of the scroll blade 12 extending along the profile direction from the tip end 122, and another part of the radially inner surface of the outer peripheral wall 14 in the circumferential direction is spaced apart from the scroll blade 12, thereby defining the suction passage SP on one side of the end plate 10 by the end plate 10, the scroll blade 12 and the outer peripheral wall 14, which also extends along the profile direction.

[0033] The outer peripheral wall 14 is formed with a suction window penetrating through the outer peripheral wall 14 to communicate the suction passage SP with the outside of the fixed scroll 100a, so that the working fluid can enter the compression mechanism through the suction window. Specifically, in the first embodiment according to the present application as shown in Figure 1 The fixed scroll 100a includes a first suction window 20 and a second suction window 30a arranged in the suction passage SP spaced apart from each other along the extension direction of the suction passage SP. It is understood by those skilled in the art that the suction windows of the fixed scroll are not limited to two as shown in the present embodiment, but can be more than two. Among them, the second suction window 30a is closer to the scroll type cavity formed by the scroll blade 12 than the first suction window 20. In other words, the second suction window 30a is closer to the tip end 122 of the scroll blade 12 than the first suction window 20. When the compression mechanism is working, the working fluid is sucked into the suction passage SP through the first suction window 20 and the second suction window 30a, and flows through the suction passage SP to enter the scroll type cavity for compression. Preferably, the second suction window 30a is adjacent to the scroll type cavity formed by the scroll blade 12 (or the tip end 122 of the scroll blade 12), so that the working fluid entering the suction passage SP through the second suction window 30a enters the scroll type cavity with the shortest possible path.

[0034] Compared with the fixed scroll 100 as shown in Figure 6 Since the second suction window 30a is additionally arranged in the suction passage SP in the first embodiment according to the present application, not only the suction area is greatly increased to increase the suction flow, but also since the second suction window 30a is adjacent to the scroll type cavity, the working fluid sucked into the compression mechanism through the second suction window 30a can enter the scroll type cavity for compression without flowing through a long distance of the suction passage, which is equivalent to reducing the length of the suction passage of the fixed scroll as a whole, thereby effectively reducing the suction pressure loss caused by flowing through a long distance of the suction passage, improving the suction efficiency, and being beneficial to improving the performance of the scroll compressor.

[0035] As shown in Figures 1 to 3As shown, in order to further improve the suction efficiency of the vortex, a flow guide groove 33a is further formed at the suction window 30a of the outer peripheral wall 14 to guide the working fluid flowing through the suction window 30a. Specifically, referring to Figure 1 , the suction window 30a is configured by a notch recessed from the axial free end surface of the outer peripheral wall 14 in the axial direction toward the end plate 10. In other words, the suction window 30a is configured in the form of a notch open in the axial direction toward the direction away from the end plate 10 and at the same time in the form of a notch penetrating the outer peripheral wall 14 in the radial direction. The outer peripheral wall 14 includes a window wall portion 35a axially overlapping the notch constituting the suction window 30a. The window wall portion 35 includes an axial surface 34a facing away from the end plate 10 and a radially inner surface facing inward. The flow guide groove 33a is partially formed at the axial surface 34a and partially formed at the radially inner surface of the window wall portion 35a. In particular, the flow guide groove 33a can be formed by cutting a portion of the axial surface 34a and cutting a portion of the radially inner surface of the window wall portion 35a, thereby machining the flow guide groove 33a in a simple and cost-effective manner.

[0036] In particular, the flow guide groove 33a has a guide surface 36a guiding the flow of the working fluid. In particular, as shown in Figure 1 and Figure 3 , the guide surface 36a includes a cut-off end 362a close to the tip end 122 of the scroll vane 12 in the extension direction of the intake passage SP and a start end 361a opposite to the cut-off end 362a. As shown in Figure 3 , in a cross section perpendicular to the axial direction, the radial width of the cut-off end 362a of the guide surface 36a is smaller than the radial width of the start end 361a. In particular, as shown in Figure 2 , in a cross section perpendicular to the circumferential direction, the guide surface 36a is in a curved shape protruding toward the radially outer side. Thus, the flow guide groove 33a is in a form smoothly transitioning from the suction window 30a to the intake passage SP, and when the working fluid enters the suction window 30a, it can be guided by the flow guide groove 33a (or the guide surface 36a) to exit the flow guide groove 33a (or the suction window 30a) and enter the intake passage SP in a direction substantially tangent to the extension direction of the intake passage SP.

[0037] In Figure 6In the comparative example shown, for the air suction window 20 without the flow guide groove, the working fluid enters the air suction window 20 substantially along the radial direction, and then the flow direction of the working fluid can be turned by nearly 90° to enter the suction passage SP, which can cause pressure loss and energy dissipation in the process of turning the flow direction of the working fluid. In contrast, for the air suction window 30a provided with the flow guide groove 33a according to the first embodiment of the present application, when the working fluid enters the air suction window 30a along the substantially radial direction, the working fluid can be smoothly turned under the guidance of the flow guide groove 33a, and finally enter the suction passage SP along a direction substantially tangent to the suction passage SP, thereby reducing the turning range of the flow direction of the working fluid to a certain extent, reducing the pressure loss and energy dissipation, and improving the suction efficiency.

[0038] Preferably, the flow guide groove 33a extends in the circumferential direction of the air suction window 30a, so as to achieve the guiding effect in the largest possible range. In other words, the air suction window 30a includes a first end portion 31a and a second end portion 32a opposite to each other in the extension direction of the suction passage SP, the second end portion 32a being closer to the distal end 122 of the scroll vane 12 relative to the first end portion 31a, the flow guide groove 33a extending from the first end portion 31a to the second end portion 32a of the air suction window 30a, or in other words, the starting end 361a of the guide surface 36a overlaps with the first end portion 31a of the air suction window 30a, and the ending end 362a of the guide surface 36a overlaps with the second end portion 32a of the air suction window 30a.

[0039] Preferably, as shown in the cross section perpendicular to the axial direction, Figure 3 the radial width of the starting end 361a of the guide surface 36a of the flow guide groove 33a is substantially equal to the radial width of the air suction window 30a, so that the working fluid enters the flow guide groove 33a more gently and more easily. It should be noted here that since the air suction window 30a penetrates through the outer peripheral wall 14, the radial width of the air suction window 30a is equal to the radial thickness of the outer peripheral wall 14 at the air suction window 30a.

[0040] In order to further improve the suction efficiency of the scroll, in the second embodiment according to the present application as shown in Figure 4 and Figure 5 the outer peripheral wall 14 of the fixed scroll 100b is further formed with a flow regulating groove 38b.

[0041] Specifically, referring to Figure 4The fixed scroll 100b includes a first suction window 20 and a second suction window 30b arranged spaced apart from each other along the extension direction of the suction passage SP, the second suction window 30b being closer to the scroll type cavity formed by the scroll vanes 12 than the first suction window 20. The second suction window 30b is formed with a flow guide groove 33b. Those skilled in the art can understand that the other basic structure and working principle of the fixed scroll 100b according to the second embodiment of the present application are basically the same as those of the fixed scroll 100a according to the first embodiment of the present application, and will not be described here again.

[0042] The flow regulation groove 38b is located at the connection of the flow guide groove 33b and the suction passage SP and is open to the suction passage SP. More specifically, referring to Figure 5 , the flow regulation groove 38b can be formed partially at the guide surface 36b of the flow guide groove 33b and partially at the radially inner surface of the window wall portion 35b of the outer peripheral wall 14. In other words, the flow regulation groove 38b can be formed by cutting a portion of the guide surface 36b of the flow guide groove 33b and a portion of the radially inner surface of the window wall portion 35b, thereby machining the flow regulation groove 38b in a simple and cost-effective manner.

[0043] In addition, those skilled in the art can understand that the flow regulation groove is not limited to the form shown in Figure 5 , in which the guide surface 36b of the flow guide groove 33b is recessed axially toward the end plate 10, but can also be formed by the guide surface 36b of the flow guide groove 33b being convex in the axial direction away from the end plate 10. That is, the guide surface 36b of the flow guide groove 33b is convex at the connection thereof with the suction passage SP and is formed with a plurality of teeth, thereby defining flow regulation grooves between adjacent teeth.

[0044] For the fixed scroll 100b according to the second embodiment of the present application, when the working fluid is sucked into the second suction window 30b, the working fluid can not only enter the suction passage SP more smoothly under the guidance of the flow guide groove 33b, thereby obtaining the advantage of reducing the flow direction change of the working fluid similar to the first embodiment of the present application, but also will be dispersed and broken vortex when the working fluid leaves the flow guide groove 33b and enters the suction passage SP due to the provision of the flow regulation groove 38b, thereby further reducing the dissipation of internal energy of the fluid and reducing the flow pressure loss, to further improve the suction efficiency of the scroll.

[0045] Preferably, the flow regulation groove 38b is configured as a plurality and arranged spaced apart from each other along the extension direction of the suction passage SP, thereby further enhancing the effect of the flow regulation groove 38b in dispersing and breaking vortex, to reduce the fluid energy loss as much as possible.

[0046] Preferably, as Figure 4 , Figure 5As shown, the plurality of spaced apart rectification grooves 38b are arranged in a manner of sequentially increasing in the direction from the first end 31b of the suction window 30b toward the second end 32b. In other words, for two adjacent rectification grooves 38b, the rectification groove close to the second end 32b of the suction window is larger than the rectification groove close to the first end 31b of the suction window. It is noted that the "larger" here refers to the axial dimension and the radial dimension of the rectification groove 38b being both increased.

[0047] Although in the embodiments of the present application, the flow guide groove and the rectification groove are formed at the second suction window closest to the scroll type cavity, it is understood by those skilled in the art that the flow guide groove and / or the rectification groove can also be formed at any one or several or each of the plurality of suction windows. In addition, it is understood by those skilled in the art that the scroll member can also only include one suction window provided with the flow guide groove and / or the rectification groove.

[0048] In addition, although in the embodiments of the present application, the flow guide groove and the rectification groove are described as being formed by cutting, for example, it is understood by those skilled in the art that the flow guide groove and / or the rectification groove can also be integrally formed during the casting of the scroll member, or formed by other mechanical processing methods, without the need to introduce new parts, thereby facilitating the cost control of the scroll compressor.

[0049] In addition, it is understood by those skilled in the art that the suction window and its related structure can not only be arranged on the fixed scroll as described in the embodiments of the present application, but also on the orbiting scroll. That is, the scroll member including the suction window can be the fixed scroll and / or the orbiting scroll.

[0050] Although various embodiments of the present application have been described in detail herein, it should be understood that the application is not limited to the particular embodiments described herein but is capable of many rearrangements and modifications without departing from the scope of the present application. All such rearrangements and modifications are intended to fall within the scope of the present application. Moreover, all the components described herein can be replaced by other technically equivalent components.

Claims

1. A vortex component (100a, 100b), comprising: End plate (10); Scroll blade (12), the scroll blade is helical and formed on one side surface of the end plate; An outer peripheral wall (14) is configured to extend axially from the outer periphery of the end plate and surround the scroll blade, forming an air intake passage (SP) between the outer peripheral wall and the scroll blade. The outer peripheral wall has an intake window (30a, 30b) that penetrates the outer peripheral wall to connect the intake channel with the outside of the vortex component. A guide groove (33a, 33b) is formed at the intake window. The guide groove is configured to guide the working fluid flowing through the intake window so that the working fluid enters the intake channel in a direction that is approximately tangential to the extension direction of the intake channel.

2. The vortex components (100a, 100b) according to claim 1, wherein, The vortex blade includes a central end (121) located in the central region of the end plate and a terminal end (122) opposite to the central end in a spiral profile direction. The intake window includes a first end (31a, 31b) and a second end (32a, 32b) opposite to each other in the extension direction of the intake channel. The second end is closer to the terminal end relative to the first end. The guide groove extends from the first end to the second end.

3. The vortex components (100a, 100b) according to claim 1, wherein, The air intake window is formed by a notch recessed from the axial free end face of the outer peripheral wall toward the end plate. The outer peripheral wall includes window wall portions (35a, 35b) that overlap the notch in the axial direction. The window wall portions include an axial surface (34a) facing away from the end plate and an inwardly facing radial inner surface. The guide groove is partially formed on the axial surface and partially formed on the radial inner surface.

4. The vortex components (100a, 100b) according to claim 3, wherein, The guide groove is formed by cutting a portion of the axial surface and a portion of the radial inner surface.

5. The vortex components (100a, 100b) according to claim 1, wherein, The guide channel has guide surfaces (36a, 36b), which, in a cross-section perpendicular to the circumferential direction, are curved and convex outward in a radial direction.

6. The vortex component (100a, 100b) according to claim 5, wherein, The vortex blade includes a central end (121) located in the central region of the end plate and a terminal end (122) opposite to the central end in a helical profile direction. The guide surface includes a cut-off end (362a) near the terminal end in the extension direction of the intake passage and a starting end (361a) opposite to the cut-off end. In a cross section perpendicular to the axial direction, the radial width of the cut-off end of the guide surface is smaller than the radial width of the starting end.

7. The vortex component (100a, 100b) according to claim 6, wherein, In a cross section perpendicular to the axial direction, the radial width of the starting end of the guide surface is approximately equal to the radial width of the intake window.

8. The vortex component (100a, 100b) according to any one of claims 1 to 7, wherein, The outer peripheral wall is also formed with a flow straightening groove (38b), which is located at the connection between the flow guide groove and the air intake channel.

9. The vortex component (100a, 100b) according to claim 8, wherein, The rectifier groove is formed by recessing the guide surface (36b) of the guide groove (33b) axially toward the end plate or protruding axially away from the end plate.

10. The vortex component (100a, 100b) according to claim 9, wherein, The rectifier slots are configured as a plurality and are arranged at intervals from each other along the extension direction of the air intake channel.

11. The vortex component (100a, 100b) according to any one of claims 1 to 7, wherein, The vortex component includes at least two intake windows arranged spaced apart from each other along the extension direction of the intake passage.

12. The vortex component (100a, 100b) according to claim 11, wherein, The guide groove (33) is disposed at the intake window of the at least two intake windows adjacent to the vortex cavity formed by the vortex blades.

13. The vortex component (100a, 100b) according to any one of claims 1 to 7, wherein, The scroll component is a fixed scroll used in a scroll compressor.

14. A scroll compressor, wherein, The scroll compressor includes a scroll component (100a, 100b) according to any one of claims 1 to 13.

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