Valve assembly and scroll compressor

Abstract

The invention provides a valve assembly and a scroll compressor. The scroll compressor comprises a shell and a valve assembly, the static vortex plate is arranged in the shell, and an exhaust hole and at least one middle exhaust hole are formed in the static vortex plate; the orbiting scroll is arranged in the shell and matched with the static scroll to form a compression cavity, the valve assembly is arranged on the side, away from the orbiting scroll, of the static scroll, and a discharge cavity is formed between the valve assembly and the shell; the valve assembly comprises a valve seat, a first one-way valve assembly and a second one-way valve assembly. Wherein the valve seat comprises a first channel which is communicated with the discharge cavity and the exhaust hole, the first one-way valve assembly is arranged on the side, away from the static vortex plate, of the valve seat, and the first one-way valve assembly is configured to allow airflow to unidirectionally flow to the discharge cavity through the first channel from a high-pressure area of the compression cavity; the second channel is communicated with the discharge cavity and the at least one middle exhaust hole, the second one-way valve assembly is arranged in the second channel, and the second one-way valve assembly is configured to allow airflow to unidirectionally flow to the discharge cavity from the medium-pressure area of the compression cavity through the second channel.

Description

Technical Field

[0001] This application relates to the technical field of compressors, and more specifically, to a valve assembly and a scroll compressor. Background Art

[0002] The working principle of a scroll compressor is to achieve the compression of a medium by the relative movement between a moving scroll and a stationary scroll, and gradually reduce the volume of the compression chamber formed by the combination of the moving scroll and the stationary scroll. With the continuous development of compressor technology, in related technologies, intermediate injection (i.e., wet injection) technology and intermediate exhaust technology can be used to improve the performance and energy efficiency of the compressor.

[0003] To achieve the above purpose, it is necessary to open channels or holes such as an intermediate injection channel, an intermediate exhaust channel, an intermediate intake hole, and an intermediate exhaust hole on the stationary scroll, which makes the processing and assembly process of the stationary scroll relatively complex. Summary of the Invention

[0004] This application provides a valve assembly and a scroll compressor. The following introduces various aspects involved in the embodiments of this application.

[0005] In a first aspect, a valve assembly for a scroll compressor is provided. The scroll compressor includes: a housing; a stationary scroll disposed in the housing, the stationary scroll having an exhaust hole and at least one intermediate exhaust hole; a moving scroll disposed in the housing, the moving scroll cooperating with the stationary scroll to form a compression chamber, the valve assembly being disposed on a side of the stationary scroll away from the moving scroll, and forming a discharge chamber with the housing; the valve assembly includes a valve seat, a first one-way valve assembly, and a second one-way valve assembly; wherein, the valve seat includes: a first channel communicating the discharge chamber with the exhaust hole, the first one-way valve assembly being disposed on a side of the valve seat away from the stationary scroll, the first one-way valve assembly being configured to: allow air flow to unidirectionally flow from a high-pressure region of the compression chamber through the first channel to the discharge chamber; a second channel communicating the discharge chamber with the at least one intermediate exhaust hole, the second one-way valve assembly being disposed in the second channel, the second one-way valve assembly being configured to: allow air flow to unidirectionally flow from a medium-pressure region of the compression chamber through the second channel to the discharge chamber.

[0006] Optionally, the scroll compressor further includes an intermediate injection pipeline, the stationary scroll further has at least one intermediate intake hole, and the valve seat further includes: a third channel communicating the at least one intermediate intake hole with the intermediate injection pipeline of the scroll compressor to guide air flow into the medium-pressure region.

[0007] Optionally, the valve seat further includes a fourth passage communicating the first passage with the outside of the compression chamber; the valve assembly further includes: a third one-way valve assembly disposed in the fourth passage, the third one-way valve assembly being configured to: when the moving scroll rotates in the reverse direction, allow air flow to unidirectionally flow from the outside of the compression chamber through the fourth passage into the compression chamber.

[0008] Optionally, the first one-way valve assembly includes a stopper and a valve plate; the stopper is fixedly connected to the valve seat; the valve plate is encapsulated between the stopper and the valve seat, the valve plate covers the first passage, and the diameter of the valve plate is greater than that of the first passage.

[0009] Optionally, the valve assembly further includes a first sealing ring disposed between the valve plate and the valve seat, the diameter of the first sealing ring being greater than that of the first passage and less than or equal to that of the valve plate.

[0010] Optionally, a first annular groove is provided on a side of the valve seat away from the stationary scroll, the first sealing ring is embedded in the first annular groove, and the first sealing ring protrudes from the first surface of the valve seat facing the first one-way valve assembly.

[0011] Optionally, the stopper includes a base body and a fixing portion extending in a first direction perpendicular to the base body, the fixing portion being used to fix the stopper on the first surface; the projection of the fixing portion on the first surface at least covers a partial area of the first sealing ring.

[0012] Optionally, the second one-way valve assembly includes: a first blocking member disposed in the second passage for opening and closing the second passage; a first elastic member abutted against the first blocking member to apply a thrust force toward the stationary scroll side to the first blocking member.

[0013] Optionally, the third one-way valve assembly includes: a second blocking member and a second elastic member disposed in the fourth passage; when the moving scroll rotates forward, the second elastic member abuts against the second blocking member under the action of elastic force to prevent the air flow in the compression chamber from flowing through the fourth passage to the outside of the compression chamber; when the moving scroll rotates in the reverse direction, the second elastic member is elastically deformed under the action of the air flow outside the compression chamber and separates from the second blocking member, so that the air flow outside the compression chamber flows through the fourth passage into the compression chamber.

[0014] Optionally, the housing includes a top cover and an inner cover, and the top cover, the inner cover, and the valve assembly enclose to form the discharge cavity; the valve assembly further includes a second sealing ring disposed between the valve seat and the inner cover for sealing the discharge cavity; a second groove is provided on a side of the valve seat away from the stationary scroll, and the second sealing ring is disposed in the second groove.

[0015] In a second aspect, a scroll compressor is provided, including the valve assembly as described in the first aspect.

[0016] Compared with the prior art solutions, in the scroll compressor provided in the embodiments of the present application, by providing an independent valve assembly on the stationary scroll, a plurality of channels for exhaust, intermediate exhaust, and intermediate injection are formed on the valve assembly by milling or drilling, and, by separating the valve assembly from the stationary scroll, only rough machining of one side of the stationary scroll close to the valve assembly is required to meet the various functional requirements of the compressor. By implementing the technical solutions of the embodiments of the present application, the machining process of the stationary scroll can be simplified and thus the assembly process of the scroll compressor can be simplified, and the manufacturing cost of the stationary scroll can be reduced, which has good economy. Description of the Drawings

[0017] Figure 1 It is a schematic structural diagram of the scroll compressor provided in the embodiments of the present application.

[0018] Figure 2 is Figure 1 a partial axonometric view of the scroll compressor in

[0019] Figure 3 is Figure 2 the A-A cross-sectional view in

[0020] Figure 4 is Figure 1 the B-B cross-sectional view in

[0021] Figure 5 It is a schematic structural diagram of the valve assembly provided in the embodiments of the present application.

[0022] Figure 6 is Figure 5 the C-C cross-sectional view in

[0023] Figure 7 is Figure 3 the D-D cross-sectional view in

[0024] Figure 8 is Figure 3 a partial enlarged view of the E region in

[0025] Figure 9 is Figure 8 the F-F cross-sectional view in

[0026] Figure 10 For Figure 5 the G-G sectional view in Detailed implementation mode

[0027] The embodiment of the present application provides a valve assembly and a scroll compressor. The technical solution of the present application will be further specifically described below through embodiments and in combination with the drawings. In the specification, the same or similar reference numerals indicate the same or similar components. The following description of the embodiments of the present invention with reference to the drawings is intended to explain the overall concept of the present application and should not be construed as a limitation to the present application.

[0028] The valve assembly provided by the embodiment of the present application is applied to a scroll compressor. First, the scroll compressor provided by the embodiment of the present application will be introduced in detail below in combination with the drawings.

[0029] Figure 1 is a schematic structural diagram of the scroll compressor 10 provided by the embodiment of the present application, Figure 2 For Figure 1 the partial axonometric view of the scroll compressor in Figure 3 For Figure 2 the A-A sectional view in

[0030] As Figures 1 - 3 shown, the scroll compressor 10 provided by the embodiment of the present application includes: a housing 11, a stationary scroll 12, a moving scroll 13, a valve assembly 14, etc.

[0031] The housing 11 is generally cylindrical, used to form a cylindrical closed space of the scroll compressor 10, so as to accommodate components such as the stationary scroll 12, the moving scroll 13, and the valve assembly 14.

[0032] In some embodiments, the housing 11 may include a top cover 111, an inner cover 112, an intermediate housing 113, and a lower housing 114; among them, each part of the housing 11 can be connected by welding or using fasteners.

[0033] Each part in the housing 11 can be manufactured by machining metal plates. For example, the top cover 111, the inner cover 112, and the lower housing 114 can be formed by stamping metal plates, and the intermediate housing 113 can be formed by winding and welding metal plates.

[0034] The top cover 111 and the inner cover 112 are connected by welding or interference fit, and the top cover 111, the inner cover 112, and the valve assembly 14 enclose to form the discharge chamber 15 of the compressor 10.

[0035] A frame 16 is arranged in the inner cavity of the housing 11, and its outer peripheral surface cooperates with the inner peripheral surface of the housing 11 and is fixedly connected to the housing 11.

[0036] The stationary scroll 12 is fixedly arranged in the inner cavity of the housing 11 and is fixedly connected to the frame 16.

[0037] The moving scroll 13 is arranged in the inner cavity of the housing 11 and is rotatably supported on the frame 16.

[0038] Figure 4 is Figure 1 the B-B sectional view in, showing the partial structure of the stationary scroll 12. As Figure 4 shown, the stationary scroll 12 includes a first substrate 121 and a first scroll 122 arranged on the first substrate 121; it can be understood that the first substrate 121 is a disc-shaped rotary body structure, and the first scroll 122 extends along the axis direction of the first substrate 121; the first scroll 122 is spiral and extends away from the axis around the axis.

[0039] Continue to refer to Figures 1 - 3 , the moving scroll 13 includes a second substrate 131 and a second scroll 132 arranged on the second substrate 131. Similar to the stationary scroll 12, the second substrate 131 in the moving scroll 13 is a disc-shaped rotary structure, the second scroll 132 extends along the axis of the second substrate 131, and the second scroll 132 is also spiral.

[0040] The second scroll 132 in the moving scroll 13 and the first scroll 122 in the stationary scroll 12 are correspondingly arranged, and the two scrolls mesh with each other to form a series of crescent-shaped compression chambers 17. Those skilled in the art know that the compression chambers formed by the meshing of the stationary scroll and the moving scroll are divided into multiple compression zones. The area close to the center of the compression chamber is the high-pressure zone, the area close to the gas inlet of the compression chamber is the low-pressure zone, and the area between the high-pressure zone and the low-pressure zone is the medium-pressure zone.

[0041] A driving device 18 is fixedly arranged at the lower end of the frame 16, and its output end is connected to the moving scroll 13. When the scroll compressor 10 works, the driving device 18 can be connected to the moving scroll 13 through a crankshaft. One end of the crankshaft is connected to the output end (rotor) of the driving device 18, and the other end is connected to the moving scroll 13. Thus, the power of the driving device 18 is output to the moving scroll 13 through the crankshaft, driving the moving scroll 13 to perform a small-radius rotary translation around the center of the base circle of the stationary scroll 12, so as to gradually push the crescent-shaped compression chamber 17 formed between the stationary scroll 12 and the moving scroll 13 towards the center. The volume of the compression chamber 17 gradually decreases, so that the pressure of the medium to be compressed in the compression chamber 17 gradually increases, and finally it is discharged to the discharge chamber 15 through the center of the stationary scroll 12.

[0042] The above-mentioned stationary scroll 12 and rotating scroll 13 can be formed by separately processing the base plates (121, 131) and scrolls (122, 132) and then fixing them together by welding or other means; alternatively, the base plates (121, 131) and scrolls (122, 132) can be integrally formed. For example, a blank of the scroll can be obtained by casting and then finely processed to obtain the scrolls (12, 13).

[0043] Refer back to Figure 4 , Figure 4 The stationary scroll 12 in

[0044] also includes: an exhaust hole 123, an intermediate exhaust hole 124, and an intermediate suction hole 125. Among them, the exhaust hole 123 is provided at the center of the first base plate 121 and penetrates the first base plate 121 for discharging the medium in the high-pressure area (i.e., the area close to the center of the compression chamber 17) of the compression chamber 17.

[0045] The intermediate exhaust hole 124 is provided on the first base plate 121 and penetrates the first base plate 121 for discharging the medium in the medium-pressure area of the compression chamber 17. The intermediate exhaust hole 124 can be one or more. It should be understood that the projection of the intermediate exhaust hole 124 along the axis direction of the first base plate 121 coincides with the medium-pressure area of the compression chamber 17, so that the medium with intermediate pressure in the compression chamber 17 can be discharged through the intermediate exhaust hole 124.

[0046] In the embodiment of the present application, the number of the intermediate exhaust holes 124 on the stationary scroll 12 is not limited. For example, only one intermediate exhaust hole can be provided; or, as a more preferable implementation manner, multiple intermediate exhaust holes can be provided on the stationary scroll 12. For example, Figure 4 the stationary scroll 12 shown in

[0047] Figure 4 is provided with two intermediate exhaust holes 124. The two intermediate exhaust holes 124 are centrosymmetric along the axis of the first base plate 121. Such a setting can balance the pressure in the compression chamber 17 and further improve the efficiency.

[0048] Refer back to Figures 1 - 3 , the valve assembly 14 in the scroll compressor is arranged on the side of the stationary scroll 12 away from the rotating scroll 13. And a discharge chamber 15 mentioned above is formed between the valve assembly 14 and the housing 11.

[0049] As shown Figure 3 in the figure, the valve assembly 14 provided by the embodiment of the present application at least includes: a valve seat 141, a first one-way valve assembly 142, and a second one-way valve assembly 143. The second one-way valve assembly 143 can be one or more.

[0050] Figure 5 is a schematic structural diagram of the valve assembly 14 provided by the embodiment of the present application. For ease of understanding, Figure 5 part of the structure of the stationary scroll 12 is also shown.

[0051] Combined with Figure 5 and Figure 3 , the valve seat 141 is a rotating body, and the valve seat 141 can be processed and formed by means such as metal turning or milling; alternatively, as an implementation method, the valve seat 141 can also be made by casting or 3D printing.

[0052] The valve seat 141 is provided with a first channel 1411, a second channel 1412, and a third channel 1413, and the plurality of channels are correspondingly arranged with the plurality of holes on the stationary scroll 12.

[0053] Among them, the first channel 1411 (also called the exhaust channel) penetrates through the valve seat 141 along the axis direction of the valve seat 141, and is used to connect the exhaust hole 123 of the stationary scroll 12 with the discharge cavity 15 of the scroll compressor, so that the medium in the high-pressure area of the compression cavity 17 can flow to the discharge cavity 15 through the exhaust hole 123 and the first channel 1411.

[0054] In some embodiments, the first channel 1411 is a circular through-hole, and the diameter of the first channel 1411 is larger than the exhaust hole 123 of the stationary scroll.

[0055] In some embodiments, the axis of the first channel 1411 coincides with the axis of the valve seat 141, that is, the first channel 1411 is located at the center of the valve seat 141. The first channel 1411 can be made by means such as turning or milling.

[0056] The second channel 1412 (also called the intermediate exhaust channel) is used to connect the discharge cavity 15 and the intermediate exhaust hole 124 of the stationary scroll 12, so that the medium in the medium-pressure area of the compression cavity 17 can flow to the discharge cavity 15 through the intermediate exhaust hole 124 and the second channel 1412. The second channel 1412 can be one or more.

[0057] It can be understood that the number of the second channels 1412 in the valve seat 141 should be the same as the number of the intermediate exhaust holes 124 on the stationary scroll 12.

[0058] Figure 6 is Figure 5 the C-C cross-sectional view inFigure 7 is Figure 3 the D-D sectional view in Figure 6 A possible implementation of the above-mentioned second channel 1412 is shown in . The second channel 1412 includes a first axial channel 1412a, a first groove 1412b, and a second axial channel 1412c. It should be noted that the axial direction mentioned here is the direction parallel to the rotation axis of the valve seat 141.

[0059] As Figure 6 shown, the first axial channel 1412a extends from the lower surface of the valve seat 141 (i.e., the side close to the stationary scroll 12) to the side away from the stationary scroll 12. The first axial channel 1412a is used to install the second one-way valve assembly 143, and the structure and installation method of the second one-way valve assembly 143 will be described in detail later.

[0060] The first groove 1412b is provided on the lower surface of the valve seat 141, and its first end is communicated with the first axial channel 1412a.

[0061] The second axial channel 1412c starts from the upper surface of the valve seat 141 (i.e., the side away from the stationary scroll 12), extends downward in a direction perpendicular to the upper surface, and penetrates through the second end of the first groove 1412b.

[0062] In some embodiments, the above-mentioned first axial channel 1412a and the second axial channel 1412c can be processed by drilling, and the first groove 1412b can be processed by milling on the lower surface of the valve seat 141.

[0063] It should be understood that Figure 6 the shape of the second channel 1412 shown in is only an example and does not limit the technical solution of the present application. The second channel 1412 can penetrate the valve seat 141 along any path as long as it can communicate the intermediate exhaust hole 124 on the stationary scroll 12 and the discharge chamber 15 of the scroll compressor.

[0064] The valve seat 141 in the embodiment of the present application is further provided with a third channel 1413 (also called an intermediate injection channel or a wet injection channel), and the third channel 1413 communicates the intermediate suction hole 125 with the intermediate injection pipeline of the scroll compressor to guide the airflow into the medium-pressure area of the compression chamber 17.

[0065] Figure 7 A possible implementation of the third channel 1413 is shown in . For ease of understanding, Figure 7Also shown is a partial structure of the stationary scroll 12, on which there are 4 intermediate suction holes 125; among them, two adjacent intermediate suction holes 125 form a group, and the two groups of intermediate suction holes 125 shown in the figure are symmetrically arranged with respect to the axis of the stationary scroll 12, so that when the medium enters the medium-pressure area of the compression chamber 17 through the intermediate suction holes 125, the pressures in the two medium-pressure areas corresponding to the two groups of intermediate suction holes 125 are balanced.

[0066] It should be noted that Figure 7 The arrangement of the 4 intermediate suction holes 125 shown is only an example, and the specific positions of the intermediate suction holes 125 on the stationary scroll 12 in the embodiments of the present application are not limited, as long as the medium can flow to the medium-pressure area of the compression chamber 17.

[0067] The embodiments of the present application also do not limit the arrangement of the above intermediate suction holes 125. When the number of the intermediate suction holes 125 is greater than two, multiple intermediate suction holes 125 can be arranged to be centrosymmetric with respect to the axis of the stationary scroll 12; or the intermediate suction holes 125 can also be divided into multiple groups, where each group includes at least two intermediate suction holes 125.

[0068] Figure 7 The third channel 1413 shown includes a first radial channel 1413a and a second groove 1413b.

[0069] When the valve seat 141 is fixed on the stationary scroll 12, the second groove 1413b communicates with the intermediate suction holes 125 on the stationary scroll 12.

[0070] The first radial channel 1413a starts from the outer circumferential surface of the valve body and extends in the radial direction to communicate with the second groove 1413b; the starting end of the first radial channel 1413a is used to connect with the intermediate injection pipeline of the scroll compressor, so that the medium in the intermediate injection pipeline can enter the compression chamber 17 from the intermediate suction holes 125 through the first radial channel 1413a and the second groove 1413b.

[0071] In some embodiments, the above second groove 1413b can be machined by milling or the like on the lower surface of the valve seat 141, and the first radial channel 1413a can be machined by drilling.

[0072] Refer back to Figure 3 , the first one-way valve assembly 142 in the valve assembly 14 is arranged on the side of the valve seat 141 away from the stationary scroll 12 (i.e., the upper surface of the valve seat 141).

[0073] The first one-way valve assembly 142 is configured to allow the air flow to flow unidirectionally from the compression chamber 17 through the first channel 1411 to the discharge chamber 15.

[0074] Figure 3 The illustrated valve assembly 14 further includes a second one-way valve assembly 143 disposed within the second passage 1412. The second one-way valve assembly 143 may be one or more.

[0075] The second one-way valve assembly 143 is configured to allow air flow to unidirectionally flow from the compression chamber 17 through the first passage 1411 to the discharge chamber 15.

[0076] The following Figure 8 will detail the specific structure of the first one-way valve assembly 142 with reference to Figure 8 which is Figure 3 a partial enlarged view of region E in

[0077] As Figure 8 shown, the first one-way valve assembly 142 may include a stopper 1421 and a valve plate 1422. Among them, the stopper 1421 may be fixedly connected to the valve seat 141 by a threaded fastener, and the threaded fastener may be, for example, a bolt or a screw. The stopper 1421 is used to encapsulate the valve plate 1422 between the stopper 1421 and the valve seat 141 to limit the moving distance of the valve plate 1422 in the vertical direction.

[0078] The stopper 1421 in the embodiment of the present application includes a base body 1421a and a fixing portion 1421b extending in a first direction perpendicular to the base body 1421a, and the fixing portion 1421b is used to fix the stopper 1421 on the upper surface of the valve seat 141.

[0079] The valve plate 1422 in the embodiment of the present application has a circular plate-like structure, and its diameter is larger than that of the first passage 1411. When the compressor is not started, the valve plate 1422 is in a first position under the action of its own gravity. At this time, the valve plate 1422 presses against the upper surface of the valve seat 141 and completely covers the first passage 1411. At this time, the valve plate 1422 can block the exhaust passage of the compressor and the medium in the discharge chamber 15 from flowing into the compression chamber 17; when the compressor starts to work and the pressure in the high-pressure area of the compression chamber 17 is less than the back pressure of the discharge chamber 15, the valve plate 1422 presses against the surface of the valve seat 141 under the action of its own gravity and the back pressure of the discharge chamber 15; when the compressor is working normally, the air flow in the compression chamber 17 pushes the valve plate 1422 upward to move to a second position, so that the medium in the compression chamber 17 flows to the discharge chamber 15 through the exhaust port and the first passage 1411.

[0080] In some embodiments, a first sealing ring 144 is further included in the valve assembly 14 and is disposed between the valve plate 1422 and the valve seat 141. The diameter of the first sealing ring 144 is greater than that of the first channel 1411 and less than or equal to the diameter of the valve plate 1422, so that when the valve plate 1422 is in the first position, it can be pressed against the sealing ring to seal the gap between the valve plate 1422 and the valve seat 141.

[0081] In some embodiments, the first sealing ring 144 is made of an elastic material, which can be, for example, PEEK (polyetheretherketone).

[0082] Please refer to Figure 5 and Figure 8 , in the valve seat 141 provided in the embodiment of the present application, a first annular groove 1414 is provided, and the first annular groove 1414 is provided on the upper surface of the valve seat 141, and the first sealing ring 144 is embedded in the first annular groove 1414.

[0083] The depth of the first annular groove 1414 is set to be less than the thickness of the first sealing ring 144, so that when the first sealing ring 144 is embedded in the first annular groove 1414, the first sealing ring 144 can protrude from the first surface of the valve seat 141 facing the first one-way valve assembly 142 (i.e., the upper surface of the valve seat 141).

[0084] A cylindrical accommodation space is formed by enclosing the base 1421a and the fixing portion 1421b in the limiter 1421, and the valve plate 1422 can move up and down in this accommodation space. When the valve plate 1422 moves from the topmost position to the bottommost position and contacts the first sealing ring 144, the valve plate 1422 will exert a downward impact force on the first sealing ring 144, causing the first sealing ring 144 to undergo elastic deformation. At this time, under the action of the elastic force, the first sealing ring 144 may come out of the first annular groove 1414, resulting in the failure of the first sealing ring 144.

[0085] Therefore, in some embodiments, the fixing portion 1421b can be used to further constrain the first sealing ring 144. Specifically, please refer to Figure 9 , Figure 9 For Figure 8 is the F-F cross-sectional view in. At least a part of the first sealing ring 144 is covered by the fixing portion 1421b to constrain the first sealing ring 144 within the first annular groove 1414.

[0086] To constrain the first sealing ring 144 in the first annular groove 1414, the inner diameter D1 of the fixing portion 1421b can be set to be smaller than the outer diameter D2 of the first sealing ring 144. At the same time, the diameter D3 of the valve plate should be set to be smaller than the inner diameter D1 of the fixing portion 1421b and larger than the median diameter D4 of the first sealing ring 144, so as to ensure that the first sealing ring 144 can be constrained in the first annular groove 1414 by the fixing portion 1421b, and at the same time, a good sealing effect between the sealing ring and the valve plate 1422 can be ensured.

[0087] In some embodiments, a fourth channel 1415 (also known as a reverse exhaust channel) is further provided on the valve seat 141 for communicating the first channel 1411 with the outside of the compression chamber 17.

[0088] Figure 10 is Figure 5 the G-G sectional view in, which shows a possible implementation of the fourth channel 1415. As Figure 10 shown, the fourth channel 1415 is arranged radially along the valve seat 141. The fourth channel 1415 starts from the outer peripheral surface of the valve seat 141 and terminates at the first channel 1411, thereby communicating the first channel 1411 with the outside of the outer peripheral surface of the valve seat 141.

[0089] The valve assembly 14 provided by the embodiment of the present application further includes a third one-way valve assembly 145 disposed in the fourth channel 1415. The third one-way valve assembly 145 is configured to allow air flow to flow from the outside of the compression chamber 17 to the compression chamber 17 through the fourth channel 1415 when the moving scroll 13 rotates in the reverse direction.

[0090] The specific structures of the above-mentioned second one-way valve assembly 143 and third one-way valve assembly 145 will be described in detail below with reference to the drawings.

[0091] As Figure 6 shown, the structure of the second one-way valve assembly 143 is shown in the figure. The second one-way valve includes a first blocking member 1431 disposed in the second channel 1412 for opening and closing the second channel 1412.

[0092] The second one-way valve assembly 143 further includes a first elastic member 1432. One end of the first elastic member 1432 abuts against the first blocking member 1431, and the other end abuts against the end of the first axial channel 1412a in the second channel 1412. The first elastic member 1432 is used to apply a lateral thrust to the first blocking member 1431 toward the side of the stationary scroll, thereby closing the second channel 1412.

[0093] As mentioned above, the second channel 1412 in the valve seat 141 communicates with the intermediate exhaust hole 124 on the stationary scroll 12, and the air flow in the medium-pressure area can be discharged to the discharge cavity 15. Specifically, when the back pressure of the discharge cavity 15 is greater than the pressure in the medium-pressure area of the compression cavity 17, the first blocking member 1431 closes the second channel 1412 under the action of the back pressure and the first elastic member 1432, and at this time, the air flow cannot flow out from the intermediate exhaust hole 124; when the pressure in the medium-pressure area is greater than the back pressure of the discharge cavity 15, under the action of the air flow, the first blocking member 1431 is pushed open, and at this time, the second channel 1412 is opened, so that the air flow in the medium-pressure area can enter the discharge cavity 15.

[0094] By providing the second check valve assembly 143, when the compressor is applied to a medium-pressure scenario, discharging the medium in the medium-pressure area through the second check valve assembly 142 and the second channel 142 can meet the usage requirements, without the need to compress the medium to the maximum pressure, which can improve the energy efficiency of the compressor and reduce the noise during the operation of the compressor.

[0095] Figure 10 The structure of the third check valve assembly 145 in the embodiment of the present application is shown. The third check valve includes a second blocking member 1451 and a second elastic member 1452.

[0096] As Figure 10 shown, when the orbiting scroll 13 rotates forward, the pressure in the compression cavity 17 increases. At this time, the second elastic member 1452 abuts against the second blocking member 1451 under the action of its own elastic force and the pressure in the compression cavity 17, thereby preventing the high-pressure air flow in the compression cavity 17 from flowing out through the fourth channel 1415.

[0097] When the orbiting scroll 13 rotates reversely, the compression cavity 17 is evacuated. At this time, the pressure outside the compression cavity 17 is greater than that inside the compression cavity 17. Under the action of the internal and external pressure difference, the second elastic member 1452 deforms and separates from the second blocking member 1451. At this time, the air flow flows from the edge of the elastic body through the fourth channel 1415 into the compression cavity 17.

[0098] By providing the third check valve assembly 145 in the fourth channel 1415, it can be ensured that the compression cavity 17 will not be evacuated when the orbiting scroll 13 rotates reversely, thereby avoiding wear between the orbiting scroll 13 and the stationary scroll 12.

[0099] Continue to refer to Figure 10, the second elastic member 1452 in the third one-way valve assembly 145 may be an elastic metal sheet, which is a sheet-like structure with a protrusion in the middle, and the protrusion faces the second blocking member 1451; a plurality of notches are arranged along the circumference of the edge of the elastic metal sheet. The second blocking member 1451 is fixed in the fourth channel 1415 and has a middle hole. When the moving scroll 13 rotates forward, the protruding part of the elastic metal sheet fits against the edge of the middle hole of the second blocking member 1451, thereby closing the fourth channel 1415; when the moving scroll 13 rotates in reverse, the elastic metal sheet undergoes elastic deformation under the action of air pressure, and its protruding part separates from the edge of the middle hole, and the air flow flows through the middle hole of the second blocking member 1451 and the plurality of notches of the elastic metal sheet to the compression chamber 17.

[0100] In the description for Figures 1 - 3 mentioned above, the housing of the scroll compressor provided in the embodiment of the present application includes a top cover 111 and an inner cover 112, and the top cover 111, the inner cover 112 and the valve assembly 14 enclose to form the discharge chamber 15 of the compressor. The discharge chamber 15 usually has a relatively high pressure. In order to prevent the compressed medium from leaking, the discharge chamber 15 also needs to be sealed.

[0101] Therefore, in some embodiments, as Figure 3 shown, the valve assembly 14 further includes a second sealing ring 146, which is arranged between the valve seat 141 and the inner cover 112 and is used to seal the discharge chamber 15.

[0102] In some embodiments, a second annular groove 1416 is provided on the valve seat 141, and the second annular groove 1416 is arranged on the side of the valve seat 141 away from the stationary scroll 12 and is used to install the second sealing ring 146.

[0103] In the scroll compressor provided in the embodiment of the present application, by providing an independent valve assembly on the stationary scroll, a plurality of channels for exhaust, intermediate exhaust and intermediate injection are formed on the valve assembly by milling or drilling. And, by separating the valve assembly from the stationary scroll, only the surface of the stationary scroll close to the valve assembly needs to be rough machined to meet the requirements. This technical solution can reduce the manufacturing cost of the stationary scroll and has good economy.

[0104] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present application.

[0105] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present application, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0106] In the present application, unless otherwise clearly specified and defined, the terms "mounted", "connected", "coupled", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0107] In the present application, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0108] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "examples", "specific examples", or "some examples", etc., mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of this application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0109] Although the embodiments of this application have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting this application. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of this application.

Claims

1. A valve assembly for a scroll compressor, the scroll compressor comprising: A housing; a stationary scroll plate disposed within the housing, the stationary scroll plate being provided with an exhaust hole and at least one intermediate exhaust hole; a moving scroll plate disposed within the housing, the moving scroll plate cooperating with the stationary scroll plate to form a compression chamber, characterized in that, The valve assembly is disposed on a side of the stationary scroll plate away from the moving scroll plate, and a discharge chamber is formed between the valve assembly and the housing; The valve assembly includes a valve seat, a first one-way valve assembly, and a second one-way valve assembly; Wherein, the valve seat includes: A first passage communicating the discharge chamber with the exhaust hole, the first one-way valve assembly is disposed on a side of the valve seat away from the stationary scroll plate, and the first one-way valve assembly is configured to: allow air flow to unidirectionally flow from a high-pressure region of the compression chamber through the first passage to the discharge chamber; A second passage communicating the discharge chamber with the at least one intermediate exhaust hole, the second one-way valve assembly is disposed in the second passage, and the second one-way valve assembly is configured to: allow air flow to unidirectionally flow from a medium-pressure region of the compression chamber through the second passage to the discharge chamber.

2. The valve assembly according to claim 1, wherein, The scroll compressor further includes an intermediate injection pipeline, and the stationary scroll plate is further provided with at least one intermediate suction hole, and the valve seat further includes: A third passage communicating the at least one intermediate suction hole with the intermediate injection pipeline of the scroll compressor to guide air flow into the medium-pressure region.

3. The valve assembly according to claim 1, wherein, The valve seat further includes a fourth passage, and the fourth passage communicates the first passage with the outside of the compression chamber; The valve assembly further includes: A third one-way valve assembly disposed in the fourth passage, and the third one-way valve assembly is configured to: when the moving scroll plate rotates reversely, allow air flow to unidirectionally flow from the outside of the compression chamber through the fourth passage to the compression chamber.

4. The valve assembly according to claim 1, wherein, The first one-way valve assembly includes a stopper and a valve plate; Wherein, the stopper is fixedly connected to the valve seat; The valve plate is encapsulated between the stopper and the valve seat, the valve plate covers the first passage, and the diameter of the valve plate is greater than that of the first passage.

5. The valve assembly according to claim 4, wherein, The valve assembly further includes: A first sealing ring disposed between the valve plate and the valve seat, and the diameter of the first sealing ring is greater than that of the first passage and less than or equal to that of the valve plate.

6. The valve assembly according to claim 5, wherein, A first annular groove is provided on a side of the valve seat away from the stationary scroll plate, the first sealing ring is embedded in the first annular groove, and the first sealing ring protrudes from a first surface of the valve seat facing the first one-way valve assembly.

7. The valve assembly according to claim 6, wherein, The stopper includes: A base; and A fixing portion extending in a first direction perpendicular to the base, and the fixing portion is used to fix the stopper on the first surface, and a projection of the fixing portion on the first surface at least covers a partial area of the first sealing ring.

8. The valve assembly according to claim 1, wherein, The second one-way valve assembly includes: A first blocking member disposed in the second passage for opening and closing the second passage; A first elastic member abutted against the first blocking member to apply a thrust to the first blocking member toward the side of the stationary scroll plate.

9. The valve assembly according to claim 3, wherein, The third one-way valve assembly includes a second blocking member and a second elastic member disposed in the fourth passage; When the moving scroll rotates forward, the second elastic member abuts against the second blocking member under the action of elastic force to prevent the air flow in the compression chamber from flowing to the outside of the compression chamber through the fourth channel; When the moving scroll rotates reversely, the second elastic member undergoes elastic deformation under the action of the air flow outside the compression chamber and separates from the second blocking member, so that the air flow outside the compression chamber flows into the compression chamber through the fourth channel.

10. The valve assembly according to any one of claims 1-9, wherein, The housing of the scroll compressor includes a top cover and an inner cover, and the top cover, the inner cover and the valve assembly enclose to form the discharge chamber; The valve assembly further includes a second sealing ring disposed between the valve seat and the inner cover for sealing the discharge chamber; A second annular groove is provided on a side of the valve seat away from the stationary scroll, and the second sealing ring is disposed in the second annular groove.

11. A scroll compressor, characterized in that, The scroll compressor includes the valve assembly according to any one of claims 1-10.

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