Stationary scroll plate and scroll compressor having the same

Abstract

The present invention discloses a stationary scroll plate and a scroll compressor having the stationary scroll plate. The stationary scroll plate includes: an end plate; a fixed scroll wrap extending from one surface of the end plate; and an internal cavity formed in the end plate. By adopting the stationary scroll plate of the embodiment of the present invention and the scroll compressor having the stationary scroll plate, the weight of the scroll compressor can be reduced, for example.

Description

Technical Field

[0001] Embodiments of the present invention relate to a stationary scroll plate and a scroll compressor having the same. Background Art

[0002] A scroll compressor includes a stationary scroll plate and a rotating scroll plate, and the stationary scroll plate and the rotating scroll plate can be formed by casting. Summary of the Invention

[0003] An object of embodiments of the present invention is to provide a stationary scroll plate and a scroll compressor having the same, whereby, for example, the weight of the scroll compressor can be reduced.

[0004] According to an embodiment of the present invention, there is provided a stationary scroll plate for a scroll compressor, including: an end plate; a fixed scroll wrap extending from one surface of the end plate; and an internal cavity formed in the end plate.

[0005] According to an embodiment of the present invention, the internal cavity has two inner walls opposite in the axial direction of the end plate and two inner walls opposite in the radial direction of the end plate.

[0006] According to an embodiment of the present invention, the stationary scroll plate for a scroll compressor further includes: a discharge hole formed in the end plate and communicating the internal cavity with the outside, for discharging materials from the internal cavity during the manufacturing process.

[0007] According to an embodiment of the present invention, the internal cavity is a plurality of internal cavities arranged around the axis of the end plate.

[0008] According to an embodiment of the present invention, the stationary scroll plate for a scroll compressor further includes: a discharge hole formed in the end plate and communicating the plurality of internal cavities with the outside, for discharging materials from the plurality of internal cavities during the manufacturing process; and a port formed in the end plate, wherein the plurality of internal cavities include two first internal cavities adjacent to the port and a plurality of second internal cavities between the two first internal cavities in the circumferential direction, and wherein the discharge hole includes: first communication holes respectively located between adjacent first internal cavities and second internal cavities and communicating the adjacent first internal cavities and second internal cavities and located between adjacent second internal cavities and communicating the adjacent second internal cavities; and second communication holes communicating the two first internal cavities with the port.

[0009] According to an embodiment of the present invention, the port is at least one of a suction port and an injection port of the compressor or a dedicated one or more ports.

[0010] According to an embodiment of the present invention, in a plane perpendicular to the axial direction of the end plate, the internal cavity has a circular, elliptical or polygonal cross section.

[0011] According to an embodiment of the present invention, the discharge hole has a circular, elliptical or polygonal cross-section.

[0012] According to an embodiment of the present invention, the end plate has: a plurality of reinforcing ribs with bosses spaced apart in the circumferential direction of the end plate; a plurality of first recesses formed between the plurality of reinforcing ribs; and a plurality of second recesses respectively formed in the plurality of reinforcing ribs.

[0013] According to an embodiment of the present invention, the stationary scroll includes a plurality of the internal cavities arranged around the axis of the end plate, the plurality of internal cavities are respectively opposite to the plurality of reinforcing ribs in the radial direction of the end plate, and the plurality of first recesses are respectively opposite to the partition walls between adjacent two internal cavities in the radial direction of the end plate.

[0014] According to an embodiment of the present invention, the end plate has a boss provided at the center of the other surface of the end plate, and at least a part or all of the internal cavities are formed in the boss.

[0015] According to an embodiment of the present invention, the stationary scroll is formed by 3D printing.

[0016] According to an embodiment of the present invention, there is also provided a scroll compressor, including: the above-mentioned stationary scroll.

[0017] By adopting the stationary scroll of the embodiment of the present invention and the scroll compressor having the stationary scroll, for example, the weight of the scroll compressor can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 FIG. 1 is a schematic perspective view of a stationary scroll for a scroll compressor according to an embodiment of the present invention;

[0019] Figure 2 FIG. 2 is another schematic perspective view of a stationary scroll for a scroll compressor according to an embodiment of the present invention;

[0020] Figure 3 FIG. Figure 1 3 is a schematic top view of the stationary scroll shown;

[0021] Figure 4 FIG. Figure 1 4 is a schematic side view of the stationary scroll shown;

[0022] Figure 5 FIG. Figure 3 5 is a schematic cross-sectional view of the stationary scroll taken along line AA in FIG.

[0023] Figure 6 FIG. Figure 4 6 is a schematic cross-sectional view of the stationary scroll taken along line BB in FIG.

[0024] Figure 7 For Figure 6 a schematic enlarged view of part C shown in: and

[0025] Figure 8 along Figure 6 a partial enlarged sectional view taken along line DD in Specific Embodiments

[0026] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0027] Referring to Figures 1 to 8 , the stationary scroll plate 100 for a scroll compressor according to an embodiment of the present invention includes: an end plate 10; a fixed scroll wrap 20 extending from one surface of the end plate 10; and an internal cavity 11 formed in the end plate 10. The internal cavity 11 has two inner walls 110 opposite in the axial direction of the end plate 10 (see Figure 5 ). The internal cavity 11 also has two inner walls 111 opposite in the radial direction of the end plate 10 (see Figure 5 , Figure 6 , Figure 7 ). The internal cavity 11 also has two inner walls 112 opposite in the circumferential direction of the end plate 10 (see Figure 6 ). The stationary scroll plate 100 can be formed by 3D printing, that is, formed by an additive manufacturing method. The stationary scroll plate 100 may include a plurality of the internal cavities 11 arranged at intervals around the axis of the end plate 10. Alternatively, the stationary scroll plate 100 may include one internal cavity 11 arranged around the axis of the end plate 10, that is, viewed from the top view of the stationary scroll plate, the sectional view of the one internal cavity 11 is annular.

[0028] According to an embodiment of the present invention, referring to Figure 6 , Figure 7 , Figure 8 , the stationary scroll plate 100 further includes a discharge hole 12 formed in the end plate 10 and communicating the internal cavity 11 with the outside, for discharging materials, such as excess manufacturing materials, from the internal cavity 11 during the manufacturing process of the stationary scroll plate.

[0029] According to an embodiment of the present invention, referring to Figures 1 to 8 , the stationary scroll plate 100 further includes: a discharge hole 12 formed in the end plate 10 and communicating the internal cavity 11 with the outside (see Figure 6 , Figure 7 ) for discharging excess manufacturing materials from the internal cavity 11 during the manufacturing process of the stationary scroll plate; and ports formed in the end plate 10, and the ports may be the suction port 15 and the injection port 16 of the compressor (see Figure 6at least one of the above. In addition, the port(s) can also be one or more ports set separately, i.e., dedicated one or more ports. Refer to Figure 6 , a plurality of said internal cavities 11 include: two first internal cavities 11A adjacent to the port and a plurality of second internal cavities 11B between the two first internal cavities 11A in the circumferential direction. The discharge holes 12 include: first communication holes 121 respectively located between adjacent first internal cavities 11A and second internal cavities 11B to communicate the adjacent first internal cavities 11A and second internal cavities 11B and located between adjacent second internal cavities 11B to communicate the adjacent second internal cavities 11B; and second communication holes 122 to communicate the two first internal cavities 11A with the port. Excess manufacturing materials are discharged from the internal cavity 11 through the port and the second communication holes 122. Although Figure 6 describes that the second communication holes 122 communicate with the suction ports 15, the second communication holes 122 can also communicate with the injection ports 16, or communicate with one or more ports set separately at any appropriate position, as long as excess manufacturing materials can be discharged from the internal cavity 11 through the port and the second communication holes 122. That is, when the injection ports 16 are used as ports or separate ports are provided, the positions of the second communication holes 122 are adjusted accordingly to ensure that the second communication holes 122 communicate with the injection ports 16, or communicate with one or more ports set separately at any appropriate position.

[0030] According to an embodiment of the present invention, refer to Figure 6 , Figure 7 , in a plane perpendicular to the axial direction of the end plate 10, the cross-section of the internal cavity 11 can be a circular, elliptical, triangular or polygonal (such as rhombus, rectangle, square, regular pentagon, hexagon) cross-section, or a cross-section of any other appropriate shape.

[0031] According to an embodiment of the present invention, refer to Figure 6 , Figure 8 , the cross-section of the discharge hole 12 can be a circular, elliptical, triangular or polygonal (such as rhombus, rectangle, square, regular pentagon, hexagon) cross-section, or a cross-section of any other appropriate shape.

[0032] According to an embodiment of the present invention, refer to Figure 1 , 3 , 5, the end plate 10 has: a boss 30 provided at the center of the other surface of the end plate 10; a plurality of reinforcing ribs 40 spaced apart in the circumferential direction of the end plate 10 around the boss 30; a plurality of first recesses 41 formed between the plurality of reinforcing ribs 40; and a plurality of second recesses 42 respectively formed in the plurality of reinforcing ribs 40. From Figure 5As can be seen, the surface of the end plate 10 provided with the boss 30 is opposite to the other surface of the end plate 10 where the fixed scroll wrap 20 extends, that is: the boss 30 and the fixed scroll wrap 20 are respectively located on both sides in the axial direction of the stationary scroll plate 100. A plurality of first recesses 41 are spaced apart in the circumferential direction of the end plate 10 around the boss 30, and a plurality of second recesses 42 are spaced apart in the circumferential direction of the end plate 10 around the boss 30. Refer to Figure 1 , 3 , 5, at least a part or all of the internal cavity 11 is formed in the boss 30. The stationary scroll plate 100 further includes an exhaust port 31 of the compressor formed in the boss 30. The boss 30 is used to connect the discharge valve of the compressor.

[0033] According to an embodiment of the present invention, refer to Figure 1 , Figure 6 , a plurality of internal cavities 11 are respectively opposite to a plurality of reinforcing ribs 40 in the radial direction of the end plate 10. A plurality of first recesses 41 are respectively opposite to the partition wall 50 between two adjacent internal cavities 11 in the radial direction of the end plate 10.

[0034] The scroll compressor according to an embodiment of the present invention includes: the above-mentioned stationary scroll plate 100, and a moving scroll plate. The moving scroll plate has a moving scroll wrap, and the moving scroll wrap and the fixed scroll wrap cooperate to form a compression chamber for compressing a medium. In addition, the scroll compressor 100 may further include: a housing and a bracket installed in the housing. The stationary scroll plate is fixed in the housing, and the moving scroll plate is rotatably supported on the bracket and engaged with the stationary scroll plate. The scroll compressor further includes a driving mechanism, and the driving mechanism is fixed at the lower end of the housing and connected to the moving scroll plate to drive the moving scroll plate to rotate.

[0035] An example of the 3D printing method of the stationary scroll plate of the scroll compressor of the present invention will be described below.

[0036] Establish a 3D model of the stationary scroll plate in CAD software, heat and melt the metal powder by a high-energy laser beam in a 3D printer, and then solidify the melted metal powder to build a complete stationary scroll plate layer by layer. The specific additive manufacturing process is as follows:

[0037] 1. Establish a 3D model of the stationary scroll plate in CAD software on a computer, convert it into a printable STL format, and send it to the control computer of the 3D printer for slicing and layering;

[0038] 2. Start the 3D printer and apply a layer of heat-fusible powder to the component building chamber;

[0039] 3. The high-energy laser beam scans each layer of powder. When the laser beam acts on the powder, the temperature of the powder reaches the melting point, thus melting the powder particles to form the cross-sectional solid of the static vortex disk. The intensity of the laser beam is adjusted to only melt the area delimited by the geometry of the component, and the surrounding powder remains in a loose powder state, playing a natural supporting role.

[0040] 4. When the cross-section of the static vortex disk is completely scanned, the forming table descends by a layer thickness distance, a new layer of powder is laid, and the next sintering is carried out. This scanning process is repeated until the forming of the part is finally completed.

[0041] 5. Take out the printed part, remove the powder around the part, and discharge the powder inside the static vortex disk through the designed discharge holes. Specifically, use a device with a structural design specifically for the discharge holes of the static vortex disk, insert the device into the discharge holes of the static vortex disk. The device can be elastic and can be seamlessly connected with the discharge holes, thereby ensuring that all the metal powder inside the static vortex disk can be cleaned up.

[0042] The additive manufacturing method can be selected from one of the following methods: direct metal additive manufacturing method, direct metal laser sintering method, selective laser sintering (SLS), selective laser melting (SLM), electron beam melting (EBM), wire arc additive manufacturing technology (WAAM), laser engineered net shaping (LENS), nanoparticle jetting (NPJ), multi-jet fusion (MJF), stereolithography, laminated object manufacturing, fused deposition modeling, and combinations thereof.

[0043] When using the additive manufacturing method to produce the static vortex disk, the metal material can be selected from one of the following materials but is not limited to the following materials: iron-based alloys, titanium and titanium-based alloys, nickel-based alloys, cobalt-chromium alloys, aluminum alloys, copper alloys, and precious metals, etc.

[0044] By adopting the static vortex disk of the embodiment of the present invention and the scroll compressor having the static vortex disk, for example, the weight of the scroll compressor can be reduced. For example, compared with the static vortex disk of the traditional scroll compressor, while maintaining the same strength, the weight of the static vortex disk according to the embodiment of the present invention can be reduced by about 30%.

[0045] According to the embodiment of the present invention, the solid reinforcing member outside the static vortex disk of the traditional scroll compressor is replaced with a hollow reinforcing rib, and the solid boss of the static vortex disk of the traditional scroll compressor is replaced with a boss with an internal cavity, thereby reducing the weight of the static vortex disk of the scroll compressor while maintaining the strength of the static vortex disk.

[0046] In addition, by providing the discharge holes 12, the metal powder during the additive manufacturing of the static vortex disk can be discharged.

Claims

1. A stationary scroll plate for a scroll compressor, comprising: An end plate; A fixed scroll wrap extending from one surface of the end plate; And An internal cavity formed in the end plate, the internal cavity being a plurality of internal cavities arranged around the axis of the end plate, A discharge hole formed in the end plate and communicating the plurality of internal cavities with the outside for discharging materials from the plurality of internal cavities during the manufacturing process; And A port formed in the end plate, Wherein the plurality of internal cavities include two first internal cavities adjacent to the port and a plurality of second internal cavities between the two first internal cavities in the circumferential direction, and Wherein the discharge hole includes: A first communication hole respectively located between adjacent first and second internal cavities and communicating the adjacent first and second internal cavities and located between adjacent second internal cavities and communicating the adjacent second internal cavities; and a second communication hole communicating the two first internal cavities with the port.

2. The stationary scroll plate for a scroll compressor according to claim 1, wherein: The internal cavity has two inner walls opposite in the axial direction of the end plate and two inner walls opposite in the radial direction of the end plate.

3. The stationary scroll plate for a scroll compressor according to claim 1, further comprising: A discharge hole formed in the end plate and communicating the internal cavity with the outside for discharging materials from the internal cavity during the manufacturing process.

4. The stationary scroll plate for a scroll compressor according to claim 1, wherein: The port is at least one of the suction port and the injection port of the compressor or a dedicated one or more ports.

5. The stationary scroll plate for a scroll compressor according to claim 1, wherein: In a plane perpendicular to the axial direction of the end plate, the internal cavity has a circular, elliptical or polygonal cross-section.

6. The stationary scroll plate for a scroll compressor according to claim 3, wherein: The discharge hole has a circular, elliptical or polygonal cross-section.

7. The stationary scroll plate for a scroll compressor according to claim 1, wherein: The end plate has: A plurality of reinforcing ribs spaced apart in the circumferential direction of the end plate; A plurality of first recesses formed between the plurality of reinforcing ribs; and A plurality of second recesses respectively formed in the plurality of reinforcing ribs.

8. The stationary scroll plate for a scroll compressor according to claim 7, wherein: The stationary scroll plate includes a plurality of the internal cavities arranged around the axis of the end plate, The plurality of internal cavities are respectively opposite to the plurality of reinforcing ribs in the radial direction of the end plate, and The plurality of first recesses are respectively opposite to the partition wall between adjacent two internal cavities in the radial direction of the end plate.

9. The stationary scroll plate for a scroll compressor according to any one of claims 1-4 and 7-8, wherein: The end plate has a boss provided at the center of the other surface of the end plate, and at least a part or all of the internal cavity is formed in the boss.

10. The stationary scroll plate for a scroll compressor according to claim 1, wherein: The stationary scroll plate is formed by 3D printing.

11. A scroll compressor, comprising: The stationary scroll disk described in claim 1.

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