Fixed scroll disk and scroll compressor with it

Abstract

Fixed spiral (100) for a scroll compressor, wherein the fixed spiral (100) comprises the following: an end plate (10); a fixed spiral turn projecting from a surface of the end plate (10); and an internal cavity (11) formed in the end plate (10); wherein the inner cavity (11) comprises several inner cavities (11) arranged around an axis of the end plate (10); further comprising: Exit holes (12) formed in the end plate (10), which establish a connection between the multiple internal cavities (11) and the exterior and are designed to remove material from the multiple internal cavities (11) during a manufacturing process; and a channel formed in the end plate (10), wherein the multiple internal cavities (11) comprise two first internal cavities (11A) adjacent to the channel and multiple second internal cavities (11B) between the two first internal cavities (11A) in a circumferential direction, and wherein the exit holes (12) comprise the following: first connecting holes (121) located between the first inner cavity (11A) and the second inner cavity (11B), which are adjacent to each other, and which connect between them, and which are located between two adjacent second inner cavities (11B), and which connect between them; and a second connecting hole (122) connecting the two first inner cavities (11A) to the channel.

Description

BACKGROUND OF THE INVENTION Area of ​​the invention

[0001] Embodiments of the present disclosure relate to a fixed scroll disk (or “fixed spiral”) and a scroll compressor therein. Description of the related technique

[0002] The scroll compressor has a fixed spiral and an orbiting spiral, which can be formed by casting.

[0003] A scroll compressor is known from US patent 2013 / 0121865A1. This compressor can have a connecting opening formed in a stationary spiral, which connects the outlet chamber and an axial bearing of the compressor. CN 203500002U describes a vortex compressor comprising a rear housing assembly with an air inlet connected to an exhaust cavity of a stationary plate. Circumferentially, the vortex compressor has a recess the other end of which is connected to an exhaust port.

[0004] From CN 2 02 250 877 U, an outlet valve for a scroll compressor is known, comprising a valve cap and a valve plate that support each other, wherein a check valve is housed in the valve cap which closes the outlet opening of the valve cap, wherein only the check valve has a seal.

[0005] The US 2017 / 0184108A1 is a lightweight, high-strength, insulating compressor component manufactured using additive manufacturing. The component may have at least one internal region comprising a lattice structure with a multitude of repeating cells. BRIEF SUMMARY OF THE INVENTION

[0006] One objective of the embodiments of the present disclosure is to provide a fixed spiral and a scroll compressor, thereby reducing, for example, the weight of the scroll compressor.

[0007] In an embodiment of the invention according to the present disclosure, a fixed spiral for a scroll compressor is provided, comprising: an end plate; a fixed spiral turn projecting from a surface of the end plate; and an inner cavity formed in the end plate; wherein the inner cavity comprises several inner cavities arranged around an axis of the end plate; further comprising: Outlet holes formed in the end plate, which create a connection between the multiple internal cavities and the outside and are designed to remove material from the multiple internal cavities during a manufacturing process; and a channel formed in the endplate, wherein the multiple internal cavities comprise two first internal cavities adjacent to the channel and multiple second internal cavities between the two first internal cavities in a circumferential direction, and the exit holes include the following: first connecting holes located between the first inner cavity and the second inner cavity, which are adjacent to each other, and which are located between two adjacent second inner cavities and which are connected to each other; and a second connecting hole connecting the two first inner cavities to the channel.

[0008] According to one embodiment of the present disclosure, the inner cavity comprises two inner walls facing each other in an axial direction of the end plate, and two inner walls facing each other in a radial direction of the end plate.

[0009] According to one embodiment of the present disclosure, the fixed spiral for the scroll compressor further comprises: an outlet hole formed in an end plate, which establishes a connection between the inner cavity and the outside and is used to discharge material from the inner cavity during a manufacturing process.

[0010] According to one embodiment of the present disclosure, the inner cavity comprises several inner cavities arranged around an axis of the end plate.

[0011] According to one embodiment of the present disclosure, the fixed spiral for the scroll compressor further comprises: outlet holes formed in the end plate, which establish a connection between the multiple inner cavities and the outside and are designed to discharge material from the multiple inner cavities during the manufacturing process; and a channel formed in the end plate, wherein the multiple inner cavities comprise two first inner cavities adjacent to the channel and multiple second inner cavities between the two first inner cavities in a circumferential direction, and wherein the outlet holes comprise: first connecting holes located between the first inner cavity and the second inner cavity, which are adjacent to each other, and which are located between two adjacent second inner cavities and establish a connection between them;and a second connecting hole that connects the first two inner cavities to the channel.

[0012] According to one embodiment of the present disclosure, the channel comprises at least one suction channel and one injection channel of the compressor or one or more purpose-built channels.

[0013] According to one embodiment of the present disclosure, each internal cavity in a plane perpendicular to an axial direction of the end plate has a cross-section in a circular, elliptical or polygonal shape.

[0014] According to one embodiment of the present disclosure, each exit hole has a cross-section in a circular, elliptical or polygonal shape.

[0015] According to one embodiment of the present disclosure, the end plate comprises the following: several reinforcing ribs arranged at intervals in a circumferential direction of the end plate; several first recess parts formed between the several reinforcing ribs; and several second recess parts formed in each of the several reinforcing ribs.

[0016] According to one embodiment of the present disclosure, the solid spiral comprises several inner cavities arranged around the axis of the end plate, wherein the several inner cavities are each opposite the several of the reinforcing ribs in the radial direction of the end plate and the several first recess parts are each opposite the partition between two adjacent inner cavities in the radial direction of the end plate.

[0017] According to one embodiment of the present disclosure, the end plate comprises a projection provided in the middle of the other surface of the end plate, and at least some or all of the internal cavities are formed in the projection.

[0018] According to one embodiment of the present disclosure, the solid spiral is formed by 3D printing.

[0019] According to one embodiment of the present disclosure, a scroll compressor is provided comprising the following: the above-mentioned fixed spiral.

[0020] By using the fixed spiral and the scroll compressor with this according to the embodiment of the present disclosure, for example the weight of the scroll compressor can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic perspective view of a fixed spiral for a scroll compressor according to an embodiment of the present disclosure; Fig. 2 is another schematic perspective view of a fixed spiral for a scroll compressor according to an embodiment of the present disclosure; Fig. 3 is a schematic top view of the in Fig. 1 shown fixed spiral; Fig. 4 is a schematic side view of the in Fig. 1 shown fixed spiral; Fig. Figure 5 is a schematic cross-sectional view of the fixed spiral along line AA in Fig. 3; Fig. Figure 6 is a schematic cross-sectional view of the fixed spiral along line BB in Fig. 4; Fig. 7 is a schematic enlarged view of the in Fig. Part C shown in section 6; and Fig. Figure 8 is a partially enlarged cross-sectional view along line DD in Fig. 6. DETAILED DESCRIPTION OF THE FORM OF EXECUTION OF THE INVENTION

[0021] The present disclosure is further described below in conjunction with the drawings and special embodiments.

[0022] With reference to Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7 to Fig. Figure 8 of the fixed spiral 100 for a scroll compressor according to an embodiment of the present disclosure comprises: an end plate 10; a fixed spiral turn 20 projecting from a surface of the end plate 10; and an inner cavity 11 formed in the end plate 10. The inner cavity 11 has two inner walls 110 facing each other in the axial direction of the end plate 10 (see Figure 8). Fig. 5) The inner cavity 11 also has two inner walls 111 which face each other in the radial direction of the end plate 10 (see Fig. 5, Fig. 6 and Fig. 7) The inner cavity 11 also has two inner walls 112 facing each other in the circumferential direction of the end plate 10 (see Fig. 6) The solid spiral 100 can be formed by 3D printing, i.e., by an additive manufacturing process. The solid spiral 100 can have several internal cavities 11 arranged at intervals around the axis of the end plate 10. Alternatively, the solid spiral 100 can have one internal cavity 11 arranged around the axis of the end plate 10; that is, the cross-sectional view of the internal cavity 11, as seen from the top view of the solid spiral, is a ring.

[0023] With reference to the Fig. 6, Fig. 7 and Fig. 8 According to an embodiment of the present disclosure, the solid spiral 100 further has an outlet hole 12 formed in an end plate 10, which establishes a connection between the inner cavity 11 and the outside and is designed to remove material, such as excess manufacturing materials, from the inner cavity 11 during the manufacturing process of the solid spiral.

[0024] With reference to Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7 to Fig. 8 The fixed spiral 100 according to an embodiment of the present disclosure further comprises: an outlet hole 12 formed in the end plate 10, which establishes a connection between the inner cavity 11 and the outer area (see Fig. 6, Fig. 7) and is designed to remove excess manufacturing material from the inner cavity 11 during the manufacturing process of the solid spiral; and channels formed in the end plate 10, wherein the channels include at least one of the suction channel 15 and the injection channel 16 of the compressor (see Fig. 6) may be. In addition, the channels may also be one or more channels that are provided separately, that is, one or more dedicated channels. With reference to Fig. 6 The multiple internal cavities 11 have the following features: two first internal cavities 11A adjacent to the channel and several second internal cavities 11B between the two first internal cavities 11A in the circumferential direction. The outlet holes 12 have the following features: first connecting holes 121 located between the first internal cavity 11A and the second internal cavity 11B, which are adjacent to each other and establish a connection between them, and located between two adjacent second internal cavities 11B, which establish a connection between them; and a second connecting hole 122 connecting the two first internal cavities 11A to the channel. The excess manufacturing material is discharged from the internal cavity 11 through the channels and the second connecting hole 122. Although in Fig. Figure 6 shows that the second connecting hole 122 is connected to the intake channel 15. However, the second connecting hole 122 can also be connected to the injection channel 16 or to one or more channels provided separately at any suitable location(s), as long as excess manufacturing material from the inner cavity 11 can be removed through the channel(s) and the second connecting hole 122. That is to say, if the injection channel 16 is used as the channel, or if a separate channel is provided, the position of the second connecting hole 122 is adjusted accordingly to ensure that the second connecting hole 122 is connected to the injection channel 16 or to the one or more channels provided at any suitable location(s).

[0025] With reference to Fig. 6 and Fig. 7 According to one embodiment of the present disclosure, the cross-section of each of the inner cavities 11 in a plane perpendicular to the axial direction of the end plate 10 may be circular, elliptical, triangular or polygonal (such as a rhombus, a rectangle, a square, a regular pentagon, a hexagon) or in any other suitable shape.

[0026] With reference to Fig. 6 and Fig. 8 According to one embodiment of the present disclosure, the cross-section of each of the exit holes 12 can be circular, elliptical, triangular or polygonal (such as a rhombus, a rectangle, a square, a regular pentagon, a hexagon) or in any other suitable shape.

[0027] With reference to Fig. 1, Fig. 3 and Fig. 5 According to one embodiment of the present disclosure, the end plate 10 has the following: a projection 30 arranged in the center of the other surface of the end plate 10; several reinforcing ribs 40 arranged at intervals in a circumferential direction of the end plate 30; several first recess parts 41 formed between the several reinforcing ribs 40; and several second recess parts 42 formed in each of the several reinforcing ribs 40. Fig. Figure 5 shows that the surface of the end plate 10 provided with the projection 30 is opposite the other surface of the end plate 10 from which the fixed spiral coil 20 protrudes; that is, the projection 30 and the fixed spiral 20 are each located on either side of the fixed spiral 100 in its axial direction. Several first recess parts 41 are arranged at intervals around the projection 30 in the circumferential direction of the end plate 10, and several second recess parts 42 are arranged at intervals around the projection 30 in the circumferential direction of the end plate 10. With reference to Fig. 1, Fig. 3 and Fig. 5 At least some or all of the internal cavities 11 are formed in the projection 30. The fixed spiral 100 also has a compressor outlet channel 31, which is formed in the projection 30. The projection 30 is used for connection to the compressor's outlet valve.

[0028] With reference to Fig. 1 and Fig. 6. According to the embodiment of the present disclosure, the multiple inner cavities 11 are each located opposite the multiple reinforcing ribs 40 in the radial direction of the end plate 10. The multiple first recess parts 41 are each located opposite the partition walls 50 between two adjacent inner cavities 11 in the radial direction of the end plate 10.

[0029] The scroll compressor according to the embodiment of the present disclosure comprises the following: the aforementioned fixed spiral 101 and an orbiting spiral. The orbiting spiral has a moving spiral turn, and the moving spiral turn and the fixed spiral turn interact to form a compression cavity for producing a medium. Furthermore, the scroll compressor 100 may also have a housing and a holder installed in the housing. The fixed spiral is fixed in the housing, and the orbiting spiral is rotatably supported on the holder and engages with the fixed spiral. The scroll compressor also has a drive mechanism that is fixed at the lower end of the housing and connected to the orbiting spiral to drive the orbiting spiral to rotate.

[0030] An example of the 3D printing process for the solid spiral of the scroll compressor according to the present disclosure is described below.

[0031] In CAD software, a 3D model of the solid spiral is created, and the metal powder is heated and melted using a high-energy laser beam in the 3D printer. The molten metal powder is then solidified. A complete scroll disk is built layer by layer. The additive manufacturing process is as follows. 1. Creating a 3D model of the solid spiral in the computer using CAD software, converting it into a printable STL format and sending it to the control computer of the 3D printer for layering. 2. Starting the 3D printer and applying a layer of hot-melt powder to a component build chamber. 3. Scanning each powder layer with a high-energy laser beam. The laser beam acts on the powder to raise its temperature to the melting point, thus melting the powder particles and forming a solid spiral cross-section. The laser beam intensity is adjusted to melt only the area defined by the component's geometric shape, while the surrounding powder remains loose, serving as a natural support. 4. Lower the forming table by the distance of one layer thickness when the cross-section of the solid spiral has been completely scanned, spread a layer of new powder and perform another sintering; repeat such a scanning process until the final forming of the part is complete. 5. Removing the printed part, removing the powder surrounding the part, and draining the powder from within the solid spiral through the designated outlet holes. Specifically, a device designed to fit the structure of the solid spiral's outlet holes is used and inserted into these holes. The device can be flexible and fit seamlessly with the outlet holes, ensuring that the interior of the solid spiral is completely cleaned of metal powder.

[0032] The additive manufacturing process can be selected from one of the following: a direct metal additive manufacturing process, a direct metal laser sintering process, a selective laser sintering (SLS) process, shaping by selective laser melting (SLM), shaping by electron beam melting (EBM), arc additive manufacturing technology (WAAM), laser cladding / LENS technology (LENS - laser engineered net shaping), nanoparticle jetting (NPJ), multi-jet fusion (MJF), stereolithography, a laminated solid manufacturing process, a melting position modeling process, and one or more combinations thereof.

[0033] When using the additive manufacturing process to produce the solid spiral, the metal material can be selected from any of the following materials, without being limited to them: iron-based alloys, titanium and titanium-based alloys, nickel-based alloys, cobalt-chromium alloys, aluminum alloys, copper alloys and precious metals, etc.

[0034] By using the fixed spiral and the scroll compressor with the fixed spiral according to the embodiment of the present disclosure, the weight of the scroll compressor can, for example, be reduced. Compared with the fixed spiral of a conventional scroll compressor, the weight of the fixed spiral according to the embodiment of the present disclosure can, for example, be reduced by approximately 30% while maintaining the same strength.

[0035] According to the embodiment of the present disclosure, the solid reinforcements on the outside of the fixed spiral of the conventional scroll compressor are replaced by hollow reinforcing ribs, and the solid projection of the fixed spiral of the conventional scroll compressor is replaced by a projection with internal cavities, thereby reducing the weight of the fixed spiral of the scroll compressor while maintaining the strength of the fixed spiral.

[0036] Furthermore, by providing the exit holes 12, it is possible to remove the metal powder during the additive manufacturing of the solid spiral.

Claims

[1] Fixed spiral (100) for a scroll compressor, wherein the fixed spiral (100) comprises: an end plate (10); a fixed spiral turn projecting from a surface of the end plate (10); and an internal cavity (11) formed in the end plate (10); wherein the inner cavity (11) comprises several inner cavities (11) arranged around an axis of the end plate (10); further comprising: Exit holes (12) formed in the end plate (10), which establish a connection between the multiple internal cavities (11) and the exterior and are designed to remove material from the multiple internal cavities (11) during a manufacturing process; and a channel formed in the end plate (10), wherein the multiple internal cavities (11) comprise two first internal cavities (11A) adjacent to the channel and multiple second internal cavities (11B) between the two first internal cavities (11A) in a circumferential direction, and wherein the exit holes (12) comprise the following: first connecting holes (121) located between the first inner cavity (11A) and the second inner cavity (11B), which are adjacent to each other, and which connect between them, and which are located between two adjacent second inner cavities (11B), and which connect between them; and a second connecting hole (122) connecting the two first inner cavities (11A) to the channel. [2] Fixed spiral (100) for a scroll compressor according to claim 1, wherein: the inner cavity (11) comprises two inner walls (110) facing each other in an axial direction of the end plate (10) and two inner walls (111) facing each other in a radial direction of the end plate (10). [3] Fixed spiral (100) for a scroll compressor according to claim 1, further comprising: An outlet hole (12) formed in an end plate (10) that establishes a connection between the inner cavity (11) and the outside and is designed to remove material from the inner cavity (11) during a manufacturing process. [4] Fixed spiral (100) for a scroll compressor according to claim 1, wherein: the channel includes at least one suction channel (15) and one injection channel (16) of the compressor or one or more dedicated channels. [5] Fixed spiral (100) for a scroll compressor according to claim 1, wherein: Each internal cavity (11, 11A, 11B) in a plane perpendicular to an axial direction of the end plate (10) has a cross-section in a circular, elliptical or polygonal shape. [6] Fixed spiral (100) for a scroll compressor according to claim 1 or 3, wherein: Each exit hole (12) has a cross-section in a circular, elliptical or polygonal shape. [7] Fixed spiral (100) for a scroll compressor according to claim 1, wherein: the end plate (10) includes the following: several reinforcing ribs (40) which are arranged at intervals in a circumferential direction of the end plate (10); several first recess parts (41) formed between the several reinforcing ribs (40); and several second recess parts (42), each formed in the several reinforcing ribs (40). [8] Fixed spiral (100) for a scroll compressor according to claim 7, wherein: the solid spiral (100) several internal cavities (11), which are arranged around an axis of the end plate (10), includes the several internal cavities (11) are each opposite the several of the reinforcing ribs (40) in a radial direction of the end plate (10) and the several first recess parts (41) are each opposite a partition wall (50) between two adjacent inner cavities (11) in the radial direction of the end plate (10). [9] Fixed spiral (100) for a scroll compressor according to one of claims 1-4 and 7-8, wherein: the end plate (10) includes a projection (30), which is provided in the middle of the other surface of the end plate (10), and at least some or all of the internal cavities (11) are formed in the projection (30). [10] Fixed spiral (100) for a scroll compressor according to claim 1, wherein: the solid spiral (100) is formed by 3D printing. [11] Scroll compactors, including: the solid spiral (100) according to claim 1.

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