Valve assembly for scroll compressor and scroll compressor

Abstract

The utility model provides a valve assembly for a scroll compressor and the scroll compressor. The valve assembly comprises a valve plate, a valve block and a valve stop. At least one valve hole is formed in the valve plate, and the valve hole is arranged to be in fluid communication with the exhaust port. The valve plate is designed to selectively open and close the valve hole. The valve stop is designed to be used for limiting the distance, away from the valve hole, of the valve plate. The valve assembly further comprises a split axial limiting mechanism, and the axial limiting mechanism abuts against the upper surface of the valve plate from the axial upper portion of the valve plate so as to limit axial displacement of the valve plate relative to the fixed scroll plate end plate when the valve assembly is installed on the scroll compressor. The scroll compressor comprises the valve assembly. The valve assembly with the structure is easy to manufacture, low in cost and convenient to install.

Description

Technical Field

[0001] The utility model relates to a valve assembly, in particular to a valve assembly for a scroll compressor. Background Art

[0002] This section provides background information related to the utility model, which does not necessarily constitute the prior art.

[0003] Compressors (such as scroll compressors, etc.) can be applied to, for example, refrigeration systems, air conditioning systems, and heat pump systems. During the operation of the compressor, the compression mechanism sucks in low-pressure fluid from the low-pressure area inside the compressor and compresses the sucked low-pressure fluid. The compressed high-pressure fluid is discharged into the high-pressure area inside the compressor through the exhaust port of the compression mechanism. A one-way exhaust valve assembly is provided at the exhaust port of the compression mechanism to control the discharge of fluid from the exhaust port. Usually, an axial limiting member is required to fix the main body part of the valve assembly in place axially to prevent the main body part of the valve assembly from generating an undesired shift axially when subjected to fluid impact.

[0004] In the prior art, one implementation of the axial limiting member is that the axial limiting member is fixedly connected to the valve stop or prepared as an integral part. In this case, the manufacturing dimensional accuracy requirements for the assembly of the axial limiting member and the valve stop are relatively high, resulting in a relatively high cost. Additionally, the installation requirements for the assembly of the axial limiting member and the valve stop are also relatively high.

[0005] Furthermore, in the prior art, the clearance volume between the exhaust port and the valve assembly is relatively large and the flow passage is limited, which is not conducive to the smooth inflow of fluid from the exhaust port into the valve assembly.

[0006] Therefore, there is still room for improvement in the valve assembly in the prior art. Summary of the Utility Model

[0007] The first technical problem that the utility model aims to solve is to make the axial limiting member easier to manufacture and install and reduce costs. Another technical problem that the utility model aims to solve is to reduce the clearance volume between the exhaust port and the valve assembly and expand the effective flow passage to facilitate the inflow of fluid from the exhaust port into the valve assembly.

[0008] According to one aspect of the present utility model, there is provided a valve assembly for a scroll compressor, the scroll compressor including a fixed scroll plate, the fixed scroll plate including a fixed scroll plate end plate and an exhaust port formed in the fixed scroll plate end plate, wherein the valve assembly includes a valve plate, a valve sheet and a valve stopper. At least one valve hole is formed in the valve plate, and the valve hole is arranged to be in fluid communication with the exhaust port. The valve sheet is designed to selectively open and close the valve hole. The valve stopper is designed to limit the distance of the valve sheet away from the valve hole. The valve assembly further includes a separate axial limiting mechanism, and the axial limiting mechanism is configured to abut against the upper surface of the valve plate from above the axis of the valve plate to limit the axial displacement of the valve plate relative to the fixed scroll plate end plate when the valve assembly is installed on the scroll compressor.

[0009] The valve assembly with the above configuration, due to the fact that the axial limiting mechanism is especially separately prepared with respect to the valve stopper, reduces the requirements for manufacturing dimensional accuracy and reduces the manufacturing cost. In addition, in view of the fact that the axial limiting assembly directly presses against the valve plate, a more reliable limiting effect is provided for the valve plate. Furthermore, compared with the related solutions in which the axial limiting mechanism and the valve stopper are integrated, since the axial limiting mechanism and the valve stopper are separate, it is convenient to install the axial limiting mechanism and its installation will not affect the positioning of the valve stopper (such as circumferential positioning).

[0010] Preferably, the fixed scroll plate further includes a hub portion extending from the fixed scroll plate end plate and disposed around the exhaust port, and the valve assembly is adapted to be received in the inner space of the hub portion.

[0011] Preferably, the axial limiting mechanism includes a support member, and the support member is configured to include a hollow cylindrical portion and at least two legs. The hollow cylindrical portion has upper and lower axial end faces opposite to each other in the axial direction, and at least two of the legs are circumferentially spaced apart with respect to the hollow cylindrical portion and axially extend downward from the lower axial end face to abut against the valve plate.

[0012] Preferably, a part of the valve sheet and / or a part of the valve stopper extends into the circumferential spaced space between two adjacent legs.

[0013] By adopting at least two legs arranged at intervals, the exhaust space of the entire valve assembly is increased, and at the same time, the arrangement space of the valve sheet and the valve stopper on the valve plate is also increased.

[0014] Preferably, the axial limiting mechanism further includes an axial pressing member designed to apply axial pressure to the support member. The axial pressing member can adopt a limiting spring, and the limiting spring is configured to be partially received in a limiting spring recess formed on the inner peripheral wall of the hub portion; or the axial pressing member can adopt a threaded member, and the threaded member is adapted to be threadedly connected to the inner peripheral wall of the hub portion.

[0015] In particular, by adopting the limit spring / screw member, the installation process and the disassembly process are simplified, and in addition, the cost is reduced.

[0016] Preferably, the valve baffle, the valve plate and the valve sheet are connected together by means of a connecting mechanism.

[0017] By pre-assembling the valve baffle, the valve plate and the valve sheet into a component by means of the connecting mechanism, the process of installing the valve assembly onto the scroll compressor is made more convenient and the relative positioning (such as circumferential relative positioning) between the valve baffle, the valve plate and the valve sheet is easier to adjust to meet the requirements. Further, since the component of the valve baffle, the valve plate and the valve sheet is not fixed to the fixed scroll plate, no undesired damage will be caused to the fixed scroll plate during the installation process.

[0018] Preferably, the connecting mechanism includes a rivet and at least two pins, and the valve baffle, the valve plate and the valve sheet are connected together axially from top to bottom by means of the rivet and at least two of the pins. In this way, the valve baffle, the valve plate and the valve sheet can be conveniently and securely pre-assembled into a component and the axial and circumferential positions of the valve baffle, the valve plate and the valve sheet are reliably defined.

[0019] Preferably, a positioning counterbore is formed in the end plate of the fixed scroll plate, and the section of the rivet protruding from the lower axial surface of the valve plate is completely inserted into the positioning counterbore in a conforming fit manner.

[0020] By means of the connecting mechanism having the above configuration, the assembly is simple and at the same time the positioning of the component of the valve baffle, the valve plate and the valve sheet relative to the fixed scroll plate in the radial and circumferential directions is achieved.

[0021] According to another aspect of the present invention, the valve hole is designed to gradually narrow from bottom to top in the axial direction.

[0022] Preferably, the valve plate has two such valve holes, and the two valve holes are designed to be inclined from bottom to top in the axial direction at least at the inner wall portions of the two valve holes close to each other.

[0023] Preferably, the axial thickness of the valve plate is 4 mm or more.

[0024] By means of the valve hole having the above configuration and the appropriate thickness of the valve plate, the flow path of the air flow can be made smoother, thereby reducing gas loss. In particular, by making the inner wall portions of the two valve holes close to each other inclined from bottom to top in the axial direction, while meeting the requirement of making the flow path of the air flow smoother, only the inclined surfaces need to be machined at important positions, making the machining simpler.

[0025] According to another aspect of the present utility model, the valve plate has two of the valve holes, and the valve assembly further includes a guiding member designed to respectively guide fluid from the exhaust port into the two valve holes.

[0026] By means of the above-mentioned guiding member, the flow path of the air flow can be made smoother, reducing gas loss and further reducing the clearance volume between the exhaust port and the valve assembly.

[0027] Preferably, the guiding member is positioned between the two valve holes, and the guiding member extends axially in a tapered configuration starting from the axial lower surface of the valve plate and can extend into the exhaust port after the valve assembly is installed on the scroll compressor.

[0028] Preferably, the guiding side wall of the guiding member designed to guide fluid extends in a planar shape; or the guiding side wall of the guiding member designed to guide fluid extends in an arc shape (in this way, it is more beneficial to guide the air flow to the valve hole).

[0029] According to yet another aspect of the present utility model, a first guiding groove adapted to enhance fluid communication between the valve hole and the exhaust port is provided on the axial lower surface of the valve plate.

[0030] Preferably, the valve plate has at least two of the valve holes, and the axial upper port of the first guiding groove is in fluid communication with all the valve holes. Among them, the first guiding groove is further designed such that after the valve assembly is installed on the scroll compressor, the axial lower port of the first guiding groove can be in fluid communication with the exhaust port, and the cross-section intercepted along the radial direction of the valve plate at any axial position can cover the exhaust port and the axial projections of at least two of the valve holes on the end plate of the fixed scroll.

[0031] Preferably, the cross-sectional area of the first guiding groove intercepted along the radial direction of the valve plate remains unchanged along the axial direction of the valve plate.

[0032] By means of the above-mentioned first guiding groove, the fluid flow path is defined, realizing the rapid connection between the exhaust port and the valve hole, enabling the fluid to enter the first valve hole and the second valve hole more quickly, and reducing the clearance volume between the exhaust port and the valve hole.

[0033] Preferably, the valve plate has two of the valve holes, and the valve piece is integrally constructed with two valve covering parts, and the valve covering parts are designed to be in a V-shaped configuration. In this way, the size of the fixing part of the valve piece can be reduced, which is beneficial in the case of limited installation space.

[0034] Preferably, the valve assembly is configured such that when the valve assembly is installed on the scroll compressor, the valve plate directly contacts the end plate of the fixed scroll. In this way, the use of intermediate components is avoided, making the valve assembly structurally simpler and enabling the expansion of the flow passage in a simple manner.

[0035] The present utility model also provides a scroll compressor, which includes a fixed scroll. The fixed scroll includes an end plate of the fixed scroll and an exhaust port opened on the end plate of the fixed scroll. The scroll compressor further includes a valve assembly having the above configuration.

[0036] The present utility model also provides a scroll compressor, which includes a fixed scroll and a valve assembly. The fixed scroll includes an end plate of the fixed scroll and an exhaust port opened on the end plate of the fixed scroll. The valve assembly includes a valve plate and a valve piece. At least two valve holes are opened on the valve plate. The valve holes are arranged to be in fluid communication with the exhaust port. The valve piece is designed to selectively open and close the valve holes. A flow guiding groove adapted to enhance the fluid communication between the valve holes and the exhaust port is provided between the valve plate and the end plate of the fixed scroll. By additionally providing the flow guiding groove between the valve plate and the end plate of the fixed scroll, the flow passage of the fluid is expanded, making the flow path of the air flow smoother and reducing the gas loss.

[0037] Preferably, the flow guiding groove includes a first flow guiding groove opened on the axially lower surface of the valve plate and / or a second flow guiding groove opened on the end plate of the fixed scroll.

[0038] Preferably, the axially lower port of the second flow guiding groove is in fluid communication with the exhaust port, and the axially upper port of the second flow guiding groove is in fluid communication with at least two of the valve holes. Wherein, the second flow guiding groove is further designed such that the cross-section intercepted along the radial direction of the scroll compressor at any axial position can cover the exhaust port and the axial projections of at least two of the valve holes on the end plate of the fixed scroll.

[0039] Preferably, the cross-sectional area of the second flow guiding groove intercepted along the radial direction of the scroll compressor remains unchanged along the axial direction of the scroll compressor.

[0040] By means of the above-mentioned second flow guiding groove, it is also possible to define the fluid flow path, achieve a rapid connection between the exhaust port and the valve holes, enable the fluid to enter the first valve hole and the second valve hole more quickly, and reduce the clearance volume between the exhaust port and the valve holes. Moreover, when only the second flow guiding groove is provided on the end plate of the fixed scroll, there is no requirement for the thickness of the valve plate, so a thinner valve plate (such as a mass-produced valve plate) can be used.

[0041] Preferably, the valve assembly is a valve assembly having the above configuration.

[0042] In summary, for the valve assembly and the scroll compressor according to the present utility model, on the one hand, due to the adoption of a split axial limiting mechanism, the valve assembly is simple to manufacture, low in cost and convenient to install. On the other hand, since a diversion groove adapted to enhance the fluid communication between the valve hole and the exhaust port is provided between the valve plate and the end plate of the fixed scroll plate, the flow path of the air flow is smoother, thereby reducing gas loss. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] The foregoing and additional features and characteristics of the present application will become more apparent from the following detailed description with reference to the accompanying drawings, which are presented by way of example only and are not necessarily drawn to scale. Identical reference numerals are used to indicate identical components in the drawings, in which:

[0044] Figure 1 A longitudinal sectional view of a prior art scroll compressor is shown, which shows the arrangement of a prior art valve assembly in the scroll compressor.

[0045] Figure 2 A three-dimensional exploded view of the valve assembly of a scroll compressor according to a first embodiment of the present utility model is shown.

[0046] Figure 3A A partial top view of the scroll compressor when the valve assembly according to the first embodiment of the present utility model is assembled in the hub is shown.

[0047] Figure 3B Shows along Figure 3A A partial cross-sectional schematic view of the scroll compressor taken along the center line A-A is shown.

[0048] Figure 4 A three-dimensional schematic view of the valve assembly of a scroll compressor according to a first embodiment of the present utility model is shown, in which the limiting spring is omitted.

[0049] Figure 5A A three-dimensional schematic view of the valve plate, the valve piece and the valve stop assembled together is shown.

[0050] Figure 5B For Figure 5A The top view when viewed in the axial downward direction of

[0051] Figure 5C For Figure 5B The cross-sectional view taken along the line B-B of the assembly shown in

[0052] Figure 6 A schematic view of a V-shaped valve piece is shown.

[0053] Figure 7A A three-dimensional schematic view of the valve plate of the valve assembly of a scroll compressor according to a second embodiment of the present utility model is shown.

[0054] Figure 7B shows a top view of the valve plate when viewed from top to bottom along the axial direction. Figure 7A of the valve plate.

[0055] Figure 7C shows along Figure 7B the cross-sectional view of the valve plate in Figure 7A taken along line C-C in.

[0056] Figure 8A shows a partial top view of the scroll compressor when the valve assembly of the scroll compressor according to the second embodiment of the present invention is assembled in the hub.

[0057] Figure 8B shows along Figure 8A the partial sectional view of the scroll compressor taken along line D-D in.

[0058] Figure 9 shows a three-dimensional schematic diagram of the valve plate and the first flow guiding member of the valve assembly of the scroll compressor according to the third embodiment of the present invention.

[0059] Figure 10 shows a three-dimensional schematic diagram of the valve plate and the second flow guiding member of the valve assembly of the scroll compressor according to the third embodiment of the present invention.

[0060] Figure 11A shows a partial top view of the scroll compressor when the valve assembly of the scroll compressor according to the third embodiment of the present invention is assembled in the hub.

[0061] Figure 11B shows along Figure 11A the partial sectional schematic diagram of the scroll compressor taken along the center line E-E in, wherein the valve assembly includes a first flow guiding member.

[0062] Figure 12 shows a schematic diagram of the valve plate of the valve assembly of the scroll compressor according to the fourth embodiment of the present invention.

[0063] Figure 13 shows a partial three-dimensional schematic diagram of the scroll compressor according to the fifth embodiment of the present invention.

[0064] Figure 14 shows the valve plate mounted on Figure 13 the three-dimensional schematic diagram on the fixed scroll end plate of the scroll compressor shown in.

[0065] List of reference numerals

[0066] 100. Scroll compressor; 1. Valve plate; 11. First valve hole; 12. Second valve hole; 13. First flow guiding groove

[0067] 2. Valve plate; 21. First valve covering part; 22. Second valve covering part; 3. Valve stopper; 4. Axial limiting mechanism; 41. Support member; 411. Hollow cylindrical section; 412. Leg; 42. Limiting spring; 5. Connecting mechanism; 51. Rivet; 511. Bottom end of the rivet; 512. Head end of the rivet; 52. First pin; 53. Second pin; 6. First flow guiding member; 61. First flow guiding side wall; 7. Second flow guiding member; 71. Second flow guiding side wall; 8. Fixed scroll plate; 81. Fixed scroll plate end plate; V. Exhaust port; 82. Hub portion; 83. Limiting spring recess; 84. Positioning counterbore; 85. Second flow guiding groove; 9. Moving scroll plate; L. Axial direction; R. Radial direction. Detailed implementation manners

[0068] Now, in combination with Figures 1 to 14 the preferred implementation manners of the present utility model will be described in detail. The following description is merely exemplary in nature and is not intended to limit the present utility model and its application or use.

[0069] In the following, certain directional terms used to describe the drawings will be understood to have their normal meanings and refer to those directions involved when normally observing the drawings, but not necessarily the orientations when the device is actually in use. Specifically, the "axial direction" and the "radial direction" respectively refer to Figure 2 the directions marked by "L" and "R" in Figure 1 and the "upper" and "lower" refer to the upper and lower sides when observing at an angle of

[0070] In the following exemplary implementation manners, for the sake of convenience of description, a vertical scroll compressor is taken as an example. However, the scroll compressor according to the present utility model can also be any other suitable type of scroll compressor such as a horizontal scroll compressor.

[0071] Figure 1 A longitudinal sectional view of a prior art scroll compressor 100 is shown. First, with reference to Figure 1 the overall structure of the scroll compressor 100 will be described schematically.

[0072] As Figure 1 shown, the scroll compressor 100 mainly includes a housing, an electric motor, a drive shaft, a main bearing seat, a fixed scroll plate 8 and a moving scroll plate 9. The fixed scroll plate 8 and the moving scroll plate 9 constitute a compression mechanism adapted to compress a working fluid (such as a refrigerant). The fixed scroll plate 8 generally includes a fixed scroll plate end plate, a fixed scroll spiral, an exhaust port V provided on the fixed scroll plate end plate, and a hub portion extending from the fixed scroll plate end plate and disposed around the exhaust port V. A valve assembly is provided at the exhaust port V on the fixed scroll plate end plate to control the opening and closing of the exhaust port V.

[0073] In the prior art, the valve assembly is usually accommodated in the inner space of the hub and includes a valve stop, a valve sheet, and a valve plate that are connected together in sequence from top to bottom in the axial direction L. The valve plate is arranged closest to the fixed scroll end plate, and at least one valve hole is formed in the valve plate. Each valve hole can be in fluid communication with the exhaust port V, so that the fluid leaving the inner cavity of the scroll compressor 100 via the exhaust port V can flow into the valve assembly through the valve hole. The valve sheet is clamped between the valve stop and the valve plate, and the valve covering portion of the valve sheet can respectively cover one valve hole. The valve sheet is an elastic member and covers the valve hole under normal conditions. When the valve sheet is subjected to an external force of a certain magnitude (for example, the fluid pressure from the exhaust port V is greater than a predetermined pressure), the valve sheet can elastically deform and move away from the valve hole. The valve stop can limit the distance that the valve sheet moves away from the valve hole.

[0074] Figures 2 to 6 Fig. shows a valve assembly in a scroll compressor according to a first embodiment of the present invention. Among them, Figure 2 Fig. shows a three-dimensional exploded view of the valve assembly. Figure 3A Fig. shows a partial top view of the scroll compressor when the valve assembly is assembled in the hub. Figure 3B Fig. shows along Figure 3A a partial sectional view of the scroll compressor taken along the center line A-A. Figure 4 Fig. shows a three-dimensional schematic view of the valve assembly (the limiting spring is omitted). Figure 5A Fig. shows a three-dimensional schematic view of the valve plate, the valve sheet, and the valve stop assembled together by means of a connecting mechanism. Figure 5B For Figure 5A a top view when viewed in the axial downward direction. Figure 5C For Figure 5B a sectional view taken along line B-B of the assembly shown in Fig.

[0075] First, with reference to Figures 2 to 3B , the valve assembly of the scroll compressor according to the first embodiment of the present invention is configured to include a valve plate 1, a valve sheet 2, a valve stop 3, an axial limiting mechanism 4, and a connecting mechanism 5. Among them, the connecting mechanism 5 is designed to connect the valve stop 3, the valve sheet 2, and the valve plate 1 together, especially connected together in sequence from top to bottom in the axial direction. The axial limiting mechanism 4 is designed to limit the axial displacement of the connected valve stop 3, valve sheet 2, and valve plate 1 relative to the fixed scroll end plate 81.

[0076] When installing the valve assembly onto the scroll compressor, the valve plate 1 is closest to the end plate 81 of the fixed scroll, and preferably the valve plate 1 is in direct contact with the end plate 81 of the fixed scroll, thereby preventing the gas flowing out from the exhaust port V from overflowing through the possible gap between the valve plate 1 and the end plate 81 of the fixed scroll. Two valve holes are formed in the valve plate 1, namely the first valve hole 11 and the second valve hole 12, and each valve hole can be in fluid communication with the exhaust port V. Although two valve holes are shown as an example herein, those skilled in the art should understand that the valve plate 1 may include only one valve hole or may include more than two valve holes. The valve piece 2 is clamped between the valve stop 3 and the valve plate 1, and the valve piece 2 accordingly has two valve covering portions, and each valve covering portion can respectively cover one valve hole correspondingly.

[0077] The following will describe the axial limiting mechanism 4 in detail in conjunction with Figure 3A , Figure 3B and Figure 4 In the present application, the axial limiting mechanism 4 is separately provided with respect to the valve stop 3, that is to say, the axial limiting mechanism 4 and the valve stop 3 are two separately provided components. The axial limiting mechanism 4 is designed to press against the upper surface of the valve plate 1 from above the axis of the valve plate 1, and particularly preferably press against the outer peripheral section of the upper surface of the valve plate 1, thereby restricting the axial displacement of the valve plate 1 with respect to the end plate 81 of the fixed scroll.

[0078] Specifically, the axial limiting mechanism 4 is configured to include a support member 41. Among them, the support member 41 includes a hollow cylindrical section 411, and the hollow cylindrical section 411 has an upper axial end face and a lower axial end face arranged oppositely in the axial direction. In a feasible implementation manner, the lower axial end face of the hollow cylindrical section 411 can directly abut against the upper surface of the valve plate 1.

[0079] In order to further increase the exhaust space and increase the layout space of the valve piece 2 and the valve stop 3 on the valve plate 1 (especially in the case of having more than two valve holes), the support member 41 is further configured to include at least two legs 412. The at least two legs 412 are fixedly connected to the hollow cylindrical section 411, especially connected to the lower axial end face of the hollow cylindrical section 411, and extend along the axial direction downward from the lower axial end face until they can abut against the upper surface of the valve plate 1. The at least two legs 412 are arranged at intervals along the outer periphery of the hollow cylindrical section 411, thereby defining a certain interval space between two adjacent legs 412. Refer to Figure 4 , a part of the valve piece 2 and / or a part of the valve stop 3 can extend into the interval space. In Figure 4 an example of including three legs 412 is shown, and among them, the three legs 412 are preferably arranged at equal intervals in the circumferential direction.

[0080] The axial limiting mechanism 4 further includes an axial pressing member. In this article, the axial pressing member preferably uses a limiting spring 42. Specifically, after the support member 41, especially the leg 412, abuts against the valve plate 1, the limiting spring 42 can be used to apply an axial pressure to the support member 41. Especially refer to Figure 3B , after the valve stop 3, the valve piece 2, and the valve plate 1 are placed in the inner space of the hub portion 82, the support member 41 can be first inserted into the inner space of the hub portion 82 until the leg 412 abuts against the valve plate 1, and then the limiting spring 42 is pressed against the upper axial end surface of the hollow cylindrical portion 411. A limiting spring recess 83 is correspondingly provided on the inner peripheral wall of the hub portion 82, so that a part of the limiting spring 42, especially the outer peripheral section of the limiting spring 42, can be received in the limiting spring recess 83. The opening position of the limiting spring recess 83 is designed such that after the limiting spring 42 is partially received in the limiting spring recess 83, it will elastically press against the upper axial end surface of the hollow cylindrical portion 411. The limiting spring 42 preferably uses a corrugated spring. The limiting spring is a mass-produced part and is simple and convenient to assemble.

[0081] Of course, other forms of axial pressing members not shown in this article can also be used to apply axial stress to the support member 41. For example, the axial pressing member can use a threaded member. A corresponding threaded hole is provided on the inner peripheral wall of the hub portion 82, and the threaded member can be screwed into the corresponding threaded hole and press against the upper axial end surface of the hollow cylindrical portion 411 after being fixed in place relative to the hub portion 82.

[0082] Next, refer to Figures 5A to 5C A preferred embodiment of the connecting mechanism 5 will be described. In this application, the connecting mechanism 5 is designed to connect the valve stop 3, the valve piece 2, and the valve plate 1 together in the axial direction L from top to bottom, but the connecting mechanism 5 does not fixedly connect the assembly of the valve stop 3, the valve piece 2, and the valve plate 1 to the fixed scroll disk 8.

[0083] Specifically, the connecting mechanism 5 is configured to include a rivet 51 and a pin. The following description takes the connecting mechanism 5 including a first pin 52 and a second pin 53 as an example, but those skilled in the art should understand that the connecting mechanism 5 can include more than two pins. Refer to Figure 2 , three mounting holes that communicate and are aligned in the axial direction L are respectively provided on the valve stop 3, the valve piece 2, and the valve plate 1. Among them, the middle mounting hole is designed for the rivet 51 to pass through, and the other two mounting holes are designed for the first pin 52 and the second pin 53 to pass through respectively.

[0084] Continue to refer to Figures 5A to 5C, during assembly, first, the first pin 52 and the second pin 53 are successively passed through the valve baffle 3, the valve plate 2, and the valve plate 1 to ensure their axial alignment. Next, the three are connected by means of a rivet 51. After the connection is completed by means of the rivet 51, the head end 512 of the rivet will abut against the upper surface of the valve baffle 3, and the bottom end 511 of the rivet (the section of the rivet 51 protruding from the axial lower surface of the valve plate 1) will abut against the lower surface of the valve plate 1. Thus, no relative displacement can occur between the valve baffle 3, the valve plate 2, and the valve plate 1 along the axial direction L. It can be seen that the convenient assembly of the valve baffle 3, the valve plate 2, and the valve plate 1 is achieved by means of the above connection mechanism.

[0085] See Figure 3B , a positioning counterbore 84 is further provided on the fixed scroll end plate 81. The positioning counterbore is positioned axially below the bottom end 511 of the rivet when the valve assembly is received within the hub portion 82. The size of the positioning counterbore 84 is designed such that the bottom end 511 of the rivet can conformably and completely insert therein. Thus, after the bottom end 511 of the rivet is inserted into the positioning counterbore 84, the assembly of the valve baffle 3, the valve plate 2, and the valve plate 1 cannot move relative to the fixed scroll end plate 81 in the radial direction R and the circumferential direction.

[0086] As can be seen from the above description, when installing the valve assembly onto the scroll compressor 100, the bottom end 511 of the rivet only needs to be inserted into the positioning counterbore 84, and there is no need to connect to the positioning counterbore 84, which is simple to install. In addition, the connection process of the valve baffle 3, the valve plate 2, and the valve plate 1 can be carried out outside the hub portion 82, providing a large operating space. At the same time, there is no risk of damage to the fixed scroll end plate 81 due to improper connection operations. In addition, when it is necessary to disassemble the valve assembly from the scroll compressor 100, the assembly of the valve baffle 3, the valve plate 2, and the valve plate 1 only needs to be axially moved upward after removing the axial limiting mechanism 4 to disengage the valve assembly from the fixed scroll end plate 81, which is simple to operate.

[0087] With the cooperation of the axial limiting mechanism 4 and the connection mechanism 5 having the above configuration, the valve baffle 3, the valve plate 2, and the valve plate 1 are axially connected together and fixedly positioned with respect to the fixed scroll 8.

[0088] In addition, although in Figure 5A and Figure 5B the valve plate 2 is shown as a nearly U-shaped configuration, the valve plate 2 can also have other configurations. For example, see Figure 6 , the valve plate 2 has a first valve covering portion 21 and a second valve covering portion 22, and the first valve covering portion 21 and the second valve covering portion 22 are designed to be in a V-shaped configuration, where the valve plate 2 is a one-piece member.

[0089] Figures 7A to 8B Shows a valve assembly of a scroll compressor according to a second embodiment of the present invention. Wherein, Figure 7A Shows a three-dimensional schematic view of the valve plate 1 shown.Figure 7B Shows a top view of the valve plate 1 when viewed from top to bottom along the axial direction. Figure 7A of the valve plate 1. Figure 7C Shows along Figure 7B the cross-sectional view of the valve plate 1 taken along the line C-C in Figure 7A in. Figure 8A Shows a partial top view of the scroll compressor when the valve assembly is assembled within the hub. Figure 8B Shows along Figure 8A the partial cross-sectional view of the scroll compressor taken along the line D-D in

[0090] In order to facilitate the smooth entry of the fluid flowing out from the exhaust port V into the valve hole, the second embodiment makes further improvements to the valve plate 1.

[0091] Specifically, in the second embodiment, the valve hole formed on the valve plate 1 is designed to gradually narrow from bottom to top in the axial direction. Particularly referring to Figure 7C , when the first valve hole 11 and the second valve hole 12 are formed on the valve plate 1, at least the inner wall portions of the two valve holes close to each other are designed to be inclined from bottom to top in the axial direction. Particularly preferably, the entire outer peripheral wall of each valve hole is inclined from bottom to top in the axial direction. Referring to Figure 8B the arrow in, which shows the flow path of the fluid, it can be seen that the first valve hole 11 and the second valve hole 12 with the above configuration can make the flow path of the air flow smoother, thereby reducing gas loss.

[0092] In addition, in order to ensure the structural strength of the valve plate 1 and in order to enable the setting of flow guiding structures such as flow guiding grooves, it is preferred to design the axial thickness of the valve plate 1 to be larger, preferably more than 4 mm, and more preferably 4 - 10 mm (this can avoid the valve plate being too thick and heavy).

[0093] Those skilled in the art should understand that the second embodiment can be implemented alone or in combination with the first embodiment.

[0094] Figures 9 to 11B Shows the valve assembly of the scroll compressor according to the third embodiment of the present invention. Among them, Figure 9 shows a three-dimensional schematic view of the valve plate 1 and the first flow guiding member 6. Figure 10 shows a three-dimensional schematic view of the valve plate 1 and the second flow guiding member 7. Figure 11A shows a partial top view of the scroll compressor when the valve assembly is assembled within the hub 82. Figure 11B Shows along Figure 11A the partial cross-sectional schematic view of the scroll compressor taken along the line E-E in the middle, where the valve assembly includes the first flow guiding member 6.

[0095] To facilitate the smooth entry of the fluid flowing out from the exhaust port V into the valve holes, the valve assembly of the scroll compressor according to the third embodiment further includes a guiding member capable of guiding the fluid from the exhaust port V into the first valve hole 11 and the second valve hole 12 respectively.

[0096] Figure 9 And Figure 10 Two guiding members with different configurations are respectively shown, Figure 9 The first guiding member 6 is shown, Figure 10 The second guiding member 7 is shown. The following will take the first guiding member 6 as an example for detailed description. The first guiding member 6 is attached to the axial lower surface of the valve plate 1 and is positioned between the first valve hole 11 and the second valve hole 12. The first guiding member 6 extends in the axial downward direction from the axial lower surface of the valve plate 1 and has a gradually narrowing configuration. Refer to Figure 11B , the axial extension length of the first guiding member 6 is designed such that after the valve assembly is assembled to the scroll compressor, the first guiding member 6 can extend into the exhaust port V. Thus, the gas in the exhaust port V is diverted before leaving the exhaust port V, and then flows into the corresponding valve hole along the guiding side wall of the first guiding member 6.

[0097] Returning to refer to Figure 9 , the two first guiding side walls 61 of the first guiding member 6 for guiding the fluid from the exhaust port V into the first valve hole 11 and the second valve hole 12 respectively extend obliquely in a planar shape from bottom to top in the axial direction. Figure 10 The difference between the second guiding member 7 disclosed in Figure 9 and the first guiding member 6 disclosed in

[0098] is that the two second guiding side walls 71 of the second guiding member 7 for guiding the fluid from the exhaust port V into the first valve hole 11 and the second valve hole 12 respectively extend in an arc shape, which further optimizes the fluid flow path.

[0099] By further providing the guiding member, the flow path of the air flow can be made smoother, reducing gas loss and further reducing the clearance volume between the exhaust port and the valve assembly.

[0100] Those skilled in the art should understand that the third embodiment can be implemented alone or in combination with the first embodiment and / or the second embodiment.

[0101] Figure 12Schematic diagram of the valve plate 1 of the valve assembly of a scroll compressor according to a fourth embodiment of the present utility model is shown. The valve assembly of the scroll compressor of the fourth embodiment further includes a first guiding groove 13.

[0102] Specifically, the first guiding groove 13 is designed to be opened on the axially lower surface of the valve plate 1, particularly axially below the first valve hole 11 and the second valve hole 12. The first guiding groove 13 has an axially opposite groove bottom surface and an axially lower port (the open port facing the observer of the first guiding groove 13 in Figure 12 ), and two axially upper ports are opened on the groove bottom surface. The two axially upper ports are respectively in fluid communication with and preferably aligned with the first valve hole 11 and the second valve hole 12 (in the case of having more valve holes, with all valve holes). After the valve assembly is installed on the scroll compressor, the axially lower port is in fluid communication with the exhaust port V.

[0103] The shape and size of the cross-section of the first guiding groove 13 should meet the following conditions, that is, assuming that the first valve hole 11 and the second valve hole 12 are respectively projected axially onto the end plate 81 of the fixed scroll, the axial projection of the first valve hole 11, the axial projection of the second valve hole 12, and the exhaust port V will jointly enclose a region, and the cross-section of the first guiding groove 13 intercepted along the radial direction of the valve plate 1 at any axial position should be able to cover the above region.

[0104] Preferably, as Figure 12 shown, the cross-section of the first guiding groove 13 intercepted along the radial direction of the valve plate 1 at any axial position remains unchanged, and this configuration is convenient for processing. Nevertheless, those skilled in the art should understand that the first guiding groove 13 may also be other configurations. For example, the first guiding groove 13 may gradually narrow from bottom to top axially, which further facilitates the smooth entry of fluid into the corresponding valve holes.

[0105] By adopting the valve plate 1 with the above configuration, the fluid flowing out from the exhaust port V will first enter the first guiding groove 13, and then be distributed into the first valve hole 11 and the second valve hole 12. This defines the fluid flow path, realizes the rapid connection between the exhaust port and the valve holes, enables the fluid to enter the first valve hole 11 and the second valve hole 12 more quickly, and reduces the clearance volume between the exhaust port and the valve holes.

[0106] Those skilled in the art should understand that the fourth embodiment can be implemented alone or in combination with the first embodiment.

[0107] Figure 13 and Figure 14 shows a scroll compressor according to a fifth embodiment of the present utility model. Among them, Figure 13 shows a partial three-dimensional schematic diagram of the scroll compressor. Figure 14 shows the valve plate 1 installed onFigure 13 A perspective view of the fixed scroll plate end plate 81 of the shown scroll compressor.

[0108] Specifically, the valve assembly of the scroll compressor of the fifth embodiment further includes a second flow guiding groove 85. The second flow guiding groove 85 is similar in configuration to the first flow guiding groove 13, the difference being that the second flow guiding groove 85 is directly formed on the fixed scroll plate end plate 81.

[0109] Particularly referring to Figure 13 , the second flow guiding groove 85 has a groove bottom surface and an axially upper port with opposite axially directions (the open port facing the observer of the second flow guiding groove 85 in Figure 13 ), and an axially lower port is formed on the groove bottom surface. The axially lower port is in fluid communication with and preferably aligned with the exhaust port V. After the valve assembly is installed on the scroll compressor 100, the axially upper port is in fluid communication with the first valve hole 11 and the second valve hole 12 on the valve plate 1. Thus, the fluid flowing out from the exhaust port V will first enter the second flow guiding groove 85 and then enter the first valve hole 11 and the second valve hole 12 respectively, which defines the fluid flow path, establishes a rapid connection between the exhaust port V and the valve holes, and reduces the clearance volume between the exhaust port and the valve holes.

[0110] Similar to the first flow guiding groove 13, the shape and size of the cross-section of the second flow guiding groove 85 should also meet the following conditions, that is, assuming that the first valve hole 11 and the second valve hole 12 are respectively projected axially onto the fixed scroll plate end plate 81, the axial projection of the first valve hole 11, the axial projection of the second valve hole 12, and the exhaust port V will jointly enclose a region, and the cross-section of the second flow guiding groove 85 intercepted along the radial direction of the valve plate 1 at any axial position should be able to cover the above region. Similarly preferably, the cross-section of the first flow guiding groove 13 intercepted along the radial direction of the valve plate 1 at any axial position remains unchanged. In addition, in some embodiments, the axial depth of the second flow guiding groove 85 is greater than 3 mm, in this way, it can ensure the smoothness of the fluid passage between the exhaust port and the valve holes.

[0111] Those skilled in the art should understand that the fifth embodiment can be implemented alone or in combination with one or more of the above first to fourth embodiments.

[0112] The preferred embodiments according to the present invention have been described above in conjunction with specific embodiments. It can be understood that the above description is only exemplary and not restrictive. Without departing from the scope of the present invention, those skilled in the art can think of various variations and modifications with reference to the above description. These variations and modifications are also included in the protection scope of this application.

Claims

1. A valve assembly for a scroll compressor, the scroll compressor comprising a fixed scroll, the fixed scroll comprising a fixed scroll end plate and an exhaust port opened on the fixed scroll end plate, wherein: The valve assembly comprises: a valve plate, on which at least one valve hole is formed, and the valve hole is arranged to be in fluid communication with the exhaust port; a valve plate, the valve plate being designed to selectively open and close the valve hole; and A valve stopper, wherein the valve stopper is designed to limit the distance of the valve plate away from the valve hole; It is characterized in that the valve assembly also includes a split axial limiting mechanism, which is constructed to abut against the upper surface of the valve plate from axially above the valve plate to limit the axial displacement of the valve plate relative to the fixed scroll disk end plate when the valve assembly is installed to the scroll compressor.

2. The valve assembly according to claim 1, characterized in that The fixed scroll further includes a hub portion extending from the fixed scroll end plate and disposed around the exhaust port, and the valve assembly is adapted to be accommodated in an inner space of the hub portion.

3. The valve assembly according to claim 2, characterized in that The axial limiting mechanism includes a support member, which is constructed to include a hollow cylindrical section and at least two legs, wherein the hollow cylindrical section has an upper shaft end face and a lower shaft end face that are axially opposite, and at least two of the legs are arranged circumferentially at intervals with respect to the hollow cylindrical section and extend axially downward from the lower shaft end face to abut against the valve plate.

4. The valve assembly according to claim 3, characterized in that A portion of the valve plate and / or a portion of the valve stop extends into the circumferential spacing space between two adjacent legs.

5. The valve assembly according to claim 3, characterized in that The axial limiting mechanism also includes an axial pressing member designed to apply axial pressure to the supporting member.

6. The valve assembly according to claim 5, characterized in that The axial clamping member adopts a limit spring, and the limit spring is configured to be partially received in a limit spring recess provided on the inner circumferential wall of the hub; or the axial clamping member adopts a threaded member, and the threaded member is suitable for threaded connection with the inner circumferential wall of the hub.

7. The valve assembly according to claim 1, characterized in that The valve stopper, the valve sheet and the valve plate are connected together by means of a connecting mechanism.

8. The valve assembly according to claim 7, characterized in that The connecting mechanism comprises a rivet and at least two pins, and the valve stopper, the valve sheet and the valve plate are connected together from top to bottom in the axial direction by means of the rivet and at least two pins.

9. The valve assembly according to claim 8, characterized in that A positioning sink is provided on the end plate of the fixed scroll disk, and a section of the rivet protruding from the axial lower surface of the valve plate is inserted into the positioning sink in a conforming manner.

10. The valve assembly according to any one of claims 1 to 9, characterized in that The valve hole is designed to be gradually narrowed from bottom to top in the axial direction.

11. The valve assembly according to claim 10, characterized in that The valve plate has two valve holes, and the two valve holes are designed to be inclined from bottom to top in the axial direction at least at the inner wall portions of the two valve holes that are close to each other.

12. The valve assembly according to claim 10, characterized in that The axial thickness of the valve plate is greater than 4 mm.

13. The valve assembly according to any one of claims 1 to 9, characterized in that The valve plate has two valve holes, and the valve assembly further includes a flow guide member designed to guide the fluid from the exhaust port into the two valve holes respectively.

14. The valve assembly according to claim 13, characterized in that The guide member is positioned between the two valve holes, extends in a tapered configuration from an axial lower surface of the valve plate in the axial direction, and can extend into the discharge port after the valve assembly is mounted to the scroll compressor.

15. The valve assembly according to claim 14, characterized in that: The flow-guiding side wall of the flow-guiding member is designed to guide the fluid and extends in a plane; or The flow guiding member is designed to guide the flow guiding side wall of the fluid to extend in an arc shape.

16. The valve assembly according to any one of claims 1 to 9, characterized in that A first flow guide groove is provided on the axial lower surface of the valve plate, which is suitable for enhancing fluid communication between the valve hole and the exhaust port.

17. The valve assembly according to claim 16, characterized in that The valve plate has at least two valve holes, and the axial upper port of the first guide groove is fluidly connected to all the valve holes, wherein the first guide groove is further designed so that after the valve assembly is installed to the scroll compressor, the axial lower port of the first guide groove can be fluidly connected to the exhaust port, and the cross-section of the first guide groove taken along the radial direction of the valve plate at any axial position can cover the exhaust port and the axial projections of at least two valve holes on the fixed scroll end plate.

18. The valve assembly according to claim 17, characterized in that A cross section of the first flow guide groove taken along the radial direction of the valve plate remains unchanged along the axial direction of the valve plate.

19. The valve assembly according to any one of claims 1 to 9, characterized in that The valve plate has two valve holes, and the valve sheet includes two valve covering parts.

20. The valve assembly according to any one of claims 1 to 9, characterized in that The valve assembly is configured such that the valve plate directly contacts the fixed scroll end plate when the valve assembly is mounted to the scroll compressor.

21. A scroll compressor, comprising a fixed scroll, wherein the fixed scroll comprises a fixed scroll end plate and an exhaust port opened on the fixed scroll end plate, wherein: The scroll compressor further comprises a valve assembly according to any one of claims 1 to 20.

22. A scroll compressor, comprising: A fixed scroll disk, wherein the fixed scroll disk comprises a fixed scroll disk end plate and an exhaust port opened on the fixed scroll disk end plate; as well as A valve assembly, the valve assembly comprising a valve plate and a valve sheet, at least two valve holes are formed on the valve plate, the valve holes are arranged to be in fluid communication with the exhaust port, and the valve sheet is designed to selectively open and close the valve holes, It is characterized in that a guide groove suitable for enhancing fluid communication between the valve hole and the exhaust port is provided between the valve plate and the fixed scroll end plate.

23. The scroll compressor according to claim 22, characterized in that: The guide grooves include a first guide groove opened on the axial lower surface of the valve plate and / or a second guide groove opened on the end plate of the fixed scroll.

24. The scroll compressor according to claim 23, characterized in that The axial lower port of the second guide groove is connected to the exhaust port fluid, and the axial upper port of the second guide groove is connected to the at least two valve holes fluid, wherein the second guide groove is further designed so that a cross section taken along the radial direction of the scroll compressor at any axial position can cover the exhaust port and the axial projections of the at least two valve holes on the fixed scroll end plate.

25. The scroll compressor according to claim 24, characterized in that A cross section of the second flow guide groove taken along the radial direction of the scroll compressor remains unchanged along the axial direction of the scroll compressor.

26. A scroll compressor according to any one of claims 22 to 25, characterized in that The valve assembly is a valve assembly according to any one of claims 1 to 20.

Images