Valve assembly and scroll compressor

Abstract

The application provides a valve assembly and a scroll compressor, the scroll compressor comprising: a shell; a static scroll arranged in the shell, the static scroll being provided with an exhaust hole and at least one intermediate exhaust hole; a dynamic scroll arranged in the shell, the dynamic scroll cooperating with the static scroll to form a compression chamber, and the valve assembly being arranged on a side of the static scroll away from the dynamic scroll and forming a discharge chamber with the shell; the valve assembly comprising a valve seat, a first one-way valve assembly and a second one-way valve assembly; wherein the valve seat comprises: a first channel connecting the discharge chamber and the exhaust hole, the first one-way valve assembly being arranged on a side of the valve seat away from the static scroll, and the first one-way valve assembly being configured to allow gas flow to unidirectionally pass from a high-pressure area of the compression chamber to the discharge chamber through the first channel; and a second channel connecting the discharge chamber and the at least one intermediate exhaust hole, the second one-way valve assembly being arranged in the second channel, and the second one-way valve assembly being configured to allow gas flow to unidirectionally pass from a medium-pressure area of the compression chamber to the discharge chamber through the second channel.

Description

Technical Field

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

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

[0003] To achieve the above objectives, it is necessary to open channels or holes such as intermediate injection channels, intermediate exhaust channels, intermediate air intake holes, and intermediate exhaust holes on the stationary vortex disk, which makes the machining and assembly process of the stationary vortex disk more complicated. Summary of the Invention

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

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

[0006] Optionally, the scroll compressor further includes an intermediate injection pipeline, and the stationary scroll plate is provided with at least one intermediate intake port. The valve seat further includes a third channel connecting the at least one intermediate intake port with the intermediate injection pipeline of the scroll compressor to guide the airflow into the medium-pressure zone.

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

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

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

[0010] Optionally, the valve seat has a first annular groove on the side away from the stationary scroll plate, 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 limiter includes a base and a fixing portion extending along a first direction perpendicular to the base, the fixing portion being used to fix the limiter to the first surface; the projection of the fixing portion on the first surface at least covers a portion of the first sealing ring.

[0012] Optionally, the second one-way valve assembly includes: a first blocking member disposed within the second channel for opening and closing the second channel; and a first elastic member abutting against the first blocking member to apply a thrust toward one side of the first blocking member toward the stationary vortex disk.

[0013] Optionally, the third one-way valve assembly includes: a second blocking member and a second elastic member disposed within the fourth channel; when the moving scroll rotates forward, the second elastic member abuts against the second blocking member under elastic force to prevent airflow in the compression chamber from flowing to the outside of the compression chamber through the fourth channel; when the moving scroll rotates in reverse, the second elastic member undergoes elastic deformation under the action of airflow outside the compression chamber and separates from the second blocking member, so that airflow outside the compression chamber flows to the compression chamber through the fourth channel.

[0014] Optionally, the housing includes a top cover and an inner cover, the top cover, the inner cover, and the valve assembly together forming 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 groove is provided on the side of the valve seat away from the stationary vortex plate, and the second sealing ring is disposed in the second groove.

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

[0016] Compared to existing technologies, the scroll compressor provided in this application embodiment features an independent valve assembly on the stationary scroll. This valve assembly is milled or drilled to form multiple channels for exhaust, intermediate exhaust, and intermediate injection. Furthermore, by separating the valve assembly from the stationary scroll, only the side of the stationary scroll closest to the valve assembly needs rough machining to meet the compressor's various functional requirements. Implementing the technical solution of this application embodiment simplifies the machining process of the stationary scroll and thus simplifies the assembly process of the scroll compressor, reducing the manufacturing cost of the stationary scroll and achieving better economic efficiency. Attached Figure Description

[0017] Figure 1 This is a schematic structural diagram of a scroll compressor provided in an embodiment of this application.

[0018] Figure 2 for Figure 1 A partial axonometric view of the scroll compressor in the image.

[0019] Figure 3 for Figure 2 AA section view in the image.

[0020] Figure 4 for Figure 1 BB section view in the middle.

[0021] Figure 5 This is a schematic structural diagram of a valve assembly provided in an embodiment of this application.

[0022] Figure 6 for Figure 5 CC section view in the image.

[0023] Figure 7 for Figure 3 DD section view in the image.

[0024] Figure 8 for Figure 3 A magnified view of region E in the image.

[0025] Figure 9 for Figure 8 FF section view in the image.

[0026] Figure 10 for Figure 5 GG section view in the image. Detailed Implementation

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

[0028] The valve assembly provided in this application embodiment is applied to a scroll compressor. The scroll compressor provided in this application embodiment will be described in detail below with reference to the accompanying drawings.

[0029] Figure 1 This is a schematic structural diagram of the scroll compressor 10 provided in the embodiments of this application. Figure 2 for Figure 1 A partial isometric view of the scroll compressor in the image. Figure 3 for Figure 2 AA section view in the image.

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

[0031] The housing 11 is generally cylindrical, forming a cylindrical enclosed space for the scroll compressor 10, thereby accommodating the stationary scroll 12, the moving scroll 13, and the valve assembly 14, etc.

[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; wherein the various parts of the housing 11 may be connected by welding or by using fasteners.

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

[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 together form the discharge chamber 15 of the compressor 10.

[0035] A frame 16 is provided 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 vortex disk 12 is fixedly installed in the inner cavity of the housing 11 and is fixedly connected to the frame 16.

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

[0038] Figure 4 yes Figure 1 The BB cross-sectional view in the figure shows a partial structure of the stationary volute 12. (See figure BB cross-sectional view.) Figure 4 As shown, the stationary vortex disk 12 includes a first substrate 121 and a first vortex 122 disposed on the first substrate 121; it can be understood that the first substrate 121 is a disk-shaped rotating structure, and the first vortex 122 extends along the axial direction of the first substrate 121; the first vortex 122 is helical and extends around the axis in a direction away from the axis.

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

[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 cavities 17. As is known to those skilled in the art, the compression cavity formed by the meshing of the stationary scroll and the moving scroll is divided into multiple compression zones. The area near the center of the compression cavity is the high-pressure zone, the area near the gas inlet of the compression cavity 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 drive unit 18 is fixedly installed at the lower end of the frame 16, and its output end is connected to the moving scroll 13. When the scroll compressor 10 is working, the drive unit 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 drive unit 18, and the other end is connected to the moving scroll 13. Thus, the power of the drive unit 18 is output to the moving scroll 13 through the crankshaft, driving the moving scroll 13 to rotate around the base circle center of the stationary scroll 12 with a small radius. This gradually pushes 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, causing the pressure of the medium to be compressed in the compression chamber 17 to gradually increase. Finally, it is discharged through the center of the stationary scroll 12 to the discharge chamber 15.

[0042] The aforementioned stationary scroll 12 and moving scroll 13 can be formed by machining the substrate (121, 131) and the scroll (122, 132) separately and then fixing them together by welding or other means; or, the substrate (121, 131) and the scroll (122, 132) can be formed as a single piece. For example, the blank of the scroll can be obtained by casting and then precision machined to obtain the scroll (12, 13).

[0043] Revisit Figure 4 , Figure 4 The stationary vortex disk 12 also includes: an exhaust port 123, a central exhaust port 124, and a central intake port 125.

[0044] The exhaust port 123 is located at the center of the first substrate 121 and penetrates through the first substrate 121, and is used to discharge the medium from the high pressure area of ​​the compression chamber 17 (i.e., the area near the center of the compression chamber 17).

[0045] An intermediate vent 124 is disposed on and penetrates the first substrate 121 for discharging the medium in the intermediate pressure zone of the compression chamber 17. There may be one or more intermediate vents 124. It should be understood that the projection of the intermediate vent 124 along the axial direction of the first substrate 121 coincides with the intermediate pressure zone of the compression chamber 17, thereby allowing the medium at intermediate pressure in the compression chamber 17 to be discharged through the intermediate vent 124.

[0046] In this embodiment, the number of intermediate vent holes 124 on the stationary volute 12 is not limited. For example, only one intermediate vent hole may be provided; or, as a more preferred implementation, multiple intermediate vent holes may be provided on the stationary volute 12, for example... Figure 4 The stationary vortex disk 12 shown in the figure has two intermediate exhaust holes 124. The two intermediate exhaust holes 124 are centrally symmetrical along the axis of the first substrate 121. This arrangement can make the pressure in the compression chamber 17 reach balance, thereby further improving efficiency.

[0047] Figure 4 The stationary vortex disk 12 also includes a central suction port 125 disposed on and penetrating the first substrate 121. It should be noted that the central suction port 125 on the stationary vortex disk 12 is typically used in air conditioning or heat pump systems with jet enthalpy enhancement functions to guide the medium in the central injection channel into the medium-pressure zone of the compression chamber 17, thereby improving the energy efficiency of the air conditioning or heat pump system. There may be one or more central suction ports 125.

[0048] Revisit Figures 1-3 In this scroll compressor, the valve assembly 14 is located on the side of the stationary scroll 12 away from the moving scroll 13. Furthermore, the valve assembly 14 and the housing 11 form the discharge chamber 15 mentioned above.

[0049] like Figure 3 As shown, the valve assembly 14 provided in this application embodiment includes at least: a valve seat 141, a first check valve assembly 142, and a second check valve assembly 143. The second check valve assembly 143 may be one or more.

[0050] Figure 5 This is a schematic structural diagram of the valve assembly 14 provided in the embodiments of this application. It is for ease of understanding. Figure 5 The diagram also shows a portion of the structure of the stationary vortex disk 12.

[0051] Combination Figure 5 and Figure 3 The valve seat 141 is a rotating body, which can be formed by metal turning or milling; or, as another 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, which correspond to the multiple holes on the stationary vortex plate 12.

[0053] The first channel 1411 (also known as the exhaust channel) passes through the valve seat 141 along the axial direction of the valve seat 141 and is used to connect the exhaust port 123 of the stationary scroll 12 with the discharge chamber 15 of the scroll compressor, so that the medium in the high pressure zone of the compression chamber 17 can flow to the discharge chamber 15 through the exhaust port 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 vortex disk.

[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 manufactured by means of turning or milling.

[0056] The second channel 1412 (also known as the intermediate exhaust channel) is used to connect the discharge chamber 15 and the intermediate exhaust port 124 of the stationary vortex disk 12, so that the medium in the medium pressure zone of the compression chamber 17 can flow to the discharge chamber 15 through the intermediate exhaust port 124 and the second channel 1412. The second channel 1412 can be one or more.

[0057] Understandably, the number of second channels 1412 in valve seat 141 should be the same as the number of intermediate exhaust holes 124 on stationary volute 12.

[0058] Figure 6 yes Figure 5 CC section view in Figure 7 yes Figure 3 DD section view in the image. Figure 6 The diagram illustrates one possible implementation of the second channel 1412 described above. 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 referred to here is the direction parallel to the rotation axis of the valve seat 141.

[0059] like Figure 6 As shown, the first axial channel 1412a extends from the lower surface of the valve seat 141 (i.e. the side near the stationary scroll plate 12) to the side away from the stationary scroll plate 12. The first axial channel 1412a is used to install the second check valve assembly 143. The structure and arrangement of the second check 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 connected to the first axial channel 1412a.

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

[0062] In some embodiments, the first axial channel 1412a and the second axial channel 1412c can be machined by drilling, and the first groove 1412b can be machined 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 is only an example and does not constitute a limitation on the technical solution of this application. The second channel 1412 can pass through the valve seat 141 along any path, as long as it can connect the intermediate exhaust port 124 on the stationary scroll plate 12 and the discharge chamber 15 of the scroll compressor.

[0064] In this embodiment, the valve seat 141 is also provided with a third channel 1413 (also known as an intermediate injection channel or wet injection channel), which connects the intermediate intake port 125 with the intermediate injection pipeline of the scroll compressor to guide the airflow into the medium pressure zone of the compression chamber 17.

[0065] Figure 7 The image shows one possible implementation of the third channel 1413. For ease of understanding, Figure 7The figure also shows a partial structure of the stationary vortex disk 12, which is provided with four intermediate suction holes 125. Two adjacent intermediate suction holes 125 form a group. The two groups of intermediate suction holes 125 shown in the figure are symmetrically arranged with respect to the axis of the stationary vortex disk 12, so that when the medium enters the medium pressure zone of the compression chamber 17 through the intermediate suction holes 125, the pressure of the two medium pressure zones corresponding to the two groups of intermediate suction holes 125 is balanced.

[0066] It should be noted that, Figure 7 The arrangement of the four intermediate suction holes 125 shown is only an example. The specific position of the intermediate suction holes 125 on the stationary vortex disk 12 is not limited in this embodiment, as long as the medium can flow to the medium pressure zone of the compression chamber 17.

[0067] The arrangement of the intermediate air intake holes 125 in this embodiment is not limited. When the number of intermediate air intake holes 125 is greater than two, the multiple intermediate air intake holes 125 can be arranged symmetrically with respect to the axis of the stationary vortex disk 12; or the intermediate air intake holes 125 can be divided into multiple groups, each group including at least two intermediate air intake 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 volute 12, the second groove 1413b connects to the intermediate suction hole 125 on the stationary volute 12.

[0070] The first radial channel 1413a begins on the outer circumferential surface of the valve body and extends radially 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 port 125 via the first radial channel 1413a and the second groove 1413b.

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

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

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

[0074] Figure 3 The valve assembly 14 shown also includes a second check valve assembly 143 disposed within the second channel 1412. This second check valve assembly 143 may be one or more.

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

[0076] The following is combined with Figure 8 The specific structure of the first one-way valve assembly 142 will be described in detail. Figure 8 for Figure 3 A magnified view of region E in the image.

[0077] like Figure 8 As shown, the first one-way valve assembly 142 may include a limiter 1421 and a valve plate 1422. The limiter 1421 is fixedly connected to the valve seat 141 by a threaded fastener, such as a bolt or screw. The limiter 1421 encloses the valve plate 1422 between the limiter 1421 and the valve seat 141 to limit the vertical movement of the valve plate 1422.

[0078] The limiter 1421 in this embodiment includes a base 1421a and a fixing portion 1421b extending along a first direction perpendicular to the base 1421a. The fixing portion 1421b is used to fix the limiter 1421 to the upper surface of the valve seat 141.

[0079] In this embodiment, the valve plate 1422 is a circular plate structure with a diameter larger than the first channel 1411. When the compressor is not running, the valve plate 1422 is in the first position under its own weight. At this time, the valve plate 1422 is pressed against the upper surface of the valve seat 141 and completely covers the first channel 1411. At this time, the valve plate 1422 can block the discharge passage of the compressor and the medium in the discharge chamber 15 from flowing into the compression chamber 17. When the compressor starts running 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 is pressed against the surface of the valve seat 141 under its own weight and the back pressure of the discharge chamber 15. When the compressor is running normally, the airflow in the compression chamber 17 pushes the valve plate 1422 upward and moves it to the second position, so that the medium in the compression chamber 17 flows to the discharge chamber 15 through the exhaust port and the first channel 1411.

[0080] In some embodiments, the valve assembly 14 further includes a first sealing ring 144 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 that 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, such as PEEK (polyether ether ketone).

[0082] Please also refer to Figure 5 and Figure 8 The valve seat 141 provided in this application embodiment is provided with a first annular groove 1414, which is disposed 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] The base 1421a and the fixing part 1421b of the limiter 1421 together form a cylindrical receiving space, in which the valve plate 1422 can move up and down. When the valve plate 1422 moves from its top to its bottom and contacts the first sealing ring 144, it applies a downward impact force to the first sealing ring 144, causing elastic deformation. At this time, under the action of the elastic force, the first sealing ring 144 may dislodge from the first annular groove 1414, resulting in the failure of the first sealing ring 144.

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

[0086] In order to constrain the first sealing ring 144 in the first annular groove 1414, the inner diameter D1 of the fixing part 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 part 1421b and larger than the mean diameter D4 of the first sealing ring 144. This ensures that the first sealing ring 144 can be constrained in the first annular groove 1414 by the fixing part 1421b, and also ensures a good sealing effect between the sealing ring and the valve plate 1422.

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

[0088] Figure 10 yes Figure 5 The GG cross-sectional view in the image shows one possible implementation of the fourth channel 1415. (See image for details.) Figure 10 As shown, the fourth channel 1415 is arranged radially along the valve seat 141. The fourth channel 1415 starts at the outer peripheral surface of the valve seat 141 and ends at the first channel 1411, thereby connecting the first channel 1411 with the outer side of the outer peripheral surface of the valve seat 141.

[0089] The valve assembly 14 provided in this application embodiment also 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 airflow from the outside of the compression chamber 17 to flow into the compression chamber 17 through the fourth channel 1415 when the moving scroll 13 rotates in the opposite direction.

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

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

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

[0093] As mentioned earlier, the second channel 1412 in the valve seat 141 is connected to the intermediate exhaust port 124 on the stationary vortex plate 12, which can discharge the airflow in the medium-pressure zone to the discharge chamber 15. Specifically, when the back pressure of the discharge chamber 15 is greater than the pressure in the medium-pressure zone of the compression chamber 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 the airflow cannot flow out from the intermediate exhaust port 124; while when the pressure in the medium-pressure zone is greater than the back pressure of the discharge chamber 15, the first blocking member 1431 is pushed open under the action of the airflow, and the second channel 1412 opens, so that the airflow in the medium-pressure zone can enter the discharge chamber 15.

[0094] By setting the second one-way valve assembly 143, when the compressor is used in a medium-pressure scenario, the medium-pressure medium can be discharged through the second one-way valve assembly 142 and the second channel 142 to meet the usage requirements, without having to compress the medium to the maximum pressure. This can improve the energy efficiency of the compressor and reduce the noise of the compressor operation.

[0095] Figure 10 The structure of a third check valve assembly 145 according to an embodiment of this application is shown. The third check valve includes a second blocking member 1451 and a second elastic member 1452.

[0096] like Figure 10 As shown, when the moving vortex 13 rotates forward, the pressure in the compression chamber 17 increases. At this time, the second elastic element 1452 abuts against the second blocking element 1451 under the action of its own elastic force and the pressure in the compression chamber 17, thereby preventing the high-pressure airflow in the compression chamber 17 from flowing out through the fourth channel 1415.

[0097] When the rotating vortex 13 reverses, the compression chamber 17 is evacuated into a vacuum. At this time, the pressure outside the compression chamber 17 is greater than that inside the compression chamber 17. Under the action of the pressure difference between the inside and outside, the second elastic element 1452 deforms and separates from the second blocking element 1451. At this time, the airflow flows from the edge of the elastic body through the fourth channel 1415 to the compression chamber 17.

[0098] By providing a third one-way valve assembly 145 in the fourth channel 1415, it can be ensured that the compression chamber 17 will not be evacuated to a vacuum state when the moving scroll 13 reverses, thereby avoiding wear between the moving scroll 13 and the stationary scroll 12.

[0099] See also Figure 10The second elastic element 1452 in the third one-way valve assembly 145 can be an elastic metal sheet. This elastic metal sheet is a sheet-like structure with a protrusion in the middle, which faces the second blocking element 1451. The edge of the elastic metal sheet has multiple notches along its circumferential direction. The second blocking element 1451 is fixed in the fourth channel 1415 and has a central hole. When the moving scroll 13 rotates clockwise, the protrusion of the elastic metal sheet fits against the edge of the central hole of the second blocking element 1451, thereby sealing the fourth channel 1415. When the moving scroll 13 rotates counterclockwise, the elastic metal sheet undergoes elastic deformation under air pressure, and its protrusion separates from the edge of the central hole. The airflow flows through the central hole of the second blocking element 1451 and the multiple notches of the elastic metal sheet to the compression chamber 17.

[0100] In the previous article, regarding Figures 1-3 The description mentions that the casing of the scroll compressor provided in this application embodiment includes a top cover 111 and an inner cover 112, which together with the valve assembly 14 form the compressor's discharge chamber 15. This discharge chamber 15 typically has a high pressure, and to prevent leakage of the compressed medium, it also needs to be sealed.

[0101] Therefore, in some embodiments, such as Figure 3 As shown, the valve assembly 14 also includes a second sealing ring 146, which is disposed between the valve seat 141 and the inner cover 112 for sealing the discharge chamber 15.

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

[0103] In the scroll compressor provided in this application embodiment, an independent valve assembly is provided on the stationary scroll plate, and multiple channels for exhaust, intermediate exhaust, and intermediate injection are formed on the valve assembly by milling or drilling. Furthermore, by separating the valve assembly from the stationary scroll plate, only the side of the stationary scroll plate near the valve assembly needs to be rough-machined to meet the requirements. This technical solution can reduce the manufacturing cost of the stationary scroll plate and has good economic efficiency.

[0104] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0105] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0106] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0107] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

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

[0109] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled 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 use in a scroll compressor, the scroll compressor comprising: The system comprises: a housing; a stationary scroll plate disposed within the housing, the stationary scroll plate having an exhaust port and at least one intermediate exhaust port; and 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 located on the side of the stationary scroll away from the moving scroll, forming a discharge chamber between itself and the housing; The valve assembly includes a valve seat, a first check valve assembly, and a second check valve assembly; The valve seat includes: A first channel connects the discharge chamber and the exhaust port. A first one-way valve assembly is disposed on the side of the valve seat away from the stationary vortex disk. The first one-way valve assembly is configured to allow airflow from the high-pressure area of ​​the compression chamber to flow unidirectionally to the discharge chamber through the first channel. A second channel connects the discharge chamber to the at least one intermediate exhaust port. A second one-way valve assembly is disposed in the second channel and configured to allow airflow from the medium-pressure zone of the compression chamber to flow unidirectionally through the second channel to the discharge chamber. The casing of the scroll compressor includes a top cover and an inner cover, and the top cover, the inner cover, and the valve assembly together form the discharge chamber; The valve assembly also includes a second sealing ring disposed between the valve seat and the inner cover for sealing the discharge chamber; The valve seat has a second annular groove on the side away from the stationary vortex, and the second sealing ring is disposed in the second annular groove.

2. The valve assembly according to claim 1, characterized in that, The scroll compressor further includes an intermediate injection pipeline, and the stationary scroll plate is also provided with at least one intermediate suction port. The valve seat further includes: The third channel connects the at least one intermediate intake port to the intermediate injection pipe of the scroll compressor to guide the airflow into the medium-pressure zone.

3. The valve assembly according to claim 1, characterized in that, The valve seat further includes a fourth channel, which connects the first channel to the outside of the compression chamber; The valve assembly also includes: A third one-way valve assembly is disposed in the fourth channel, and the third one-way valve assembly is configured to allow airflow from the outside of the compression chamber to flow unidirectionally into the compression chamber through the fourth channel when the moving scroll rotates in the opposite direction.

4. The valve assembly according to claim 1, characterized in that, The first one-way valve assembly includes a limiter and a valve plate; The limiter is fixedly connected to the valve seat; The valve plate is encapsulated between the limiter and the valve seat, the valve plate covers the first channel, and the diameter of the valve plate is larger than that of the first channel.

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

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

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

8. The valve assembly according to claim 1, characterized in that, The second check valve assembly includes: A first blocking element is disposed within the second channel for opening and closing the second channel; A first elastic element abuts against the first blocking element to apply a thrust to the first blocking element toward one side of the static vortex disk.

9. The valve assembly according to claim 3, characterized in that, The third one-way valve assembly includes a second blocking element and a second elastic element disposed within the fourth channel; When the moving vortex rotates forward, the second elastic element abuts against the second blocking element under the action of elastic force to prevent the airflow in the compression chamber from flowing to the outside of the compression chamber through the fourth channel; When the moving scroll reverses, the second elastic element undergoes elastic deformation under the action of the airflow outside the compression chamber, separating from the second blocking element, so that the airflow outside the compression chamber flows into the compression chamber through the fourth channel.

10. A scroll compressor, characterized in that, The scroll compressor includes a valve assembly according to any one of claims 1-9.

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