Valve assembly and scroll compressor

Abstract

A valve assembly (14) and a scroll compressor (10). The scroll compressor (10) comprises: a housing (11); a stationary scroll (12) provided in the housing (11), a first exhaust hole (123) and at least one second exhaust hole (124) being provided in the stationary scroll (12); and an orbiting scroll (13) provided in the housing (11) and fitting with the stationary scroll (12) to form a compression chamber (17), wherein the valve assembly (14) is arranged on the side of the stationary scroll (12) that is away from the orbiting scroll (13), and a discharge chamber (15) is formed between the valve assembly (14) and the housing (11). The valve assembly (14) comprises a valve seat (141), a first one-way valve assembly (142) and a second one-way valve assembly (143), wherein the valve seat (141) comprises: a first channel (1411) communicating the discharge chamber (15) with the first exhaust hole (123), the first one-way valve assembly (142) being arranged on the side of the valve seat (141) that is away from the stationary scroll (12), and the first one-way valve assembly (142) being configured to allow an airflow to flow unidirectionally from a high-pressure area of the compression chamber (17) to the discharge chamber (15) through the first channel (1411); and a second channel (1412) communicating the discharge chamber (15) with the at least one second exhaust hole (124), the second one-way valve assembly (143) being arranged in the second channel (1412), and the second one-way valve assembly (143) being configured to allow an airflow to flow unidirectionally from a medium-pressure area of the compression chamber (17) to the discharge chamber (15) through the second channel (1412).

Description

Valve assembly and scroll compressor Technical Field

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

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

[0003] In order 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 air inlet hole and a second exhaust hole on the static vortex disc, which makes the processing and assembly process of the static vortex disc more complicated. Summary of the Invention

[0004] The present application provides a valve assembly and a scroll compressor. Various aspects involved in the embodiments of the present application are introduced below.

[0005] In a first aspect, a valve assembly for a scroll compressor is provided, the scroll compressor comprising: a housing; a fixed scroll arranged in the housing, the fixed scroll being provided with a first exhaust hole and at least one second exhaust hole; a movable scroll arranged in the housing, the movable scroll and the fixed scroll cooperating to form a compression chamber, the valve assembly being arranged on a side of the fixed scroll away from the movable scroll, and forming a discharge chamber between the fixed scroll 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 connecting the discharge chamber and the first exhaust hole, the first one-way valve assembly being arranged on a side of the valve seat away from the fixed scroll, the first one-way valve assembly being configured to allow airflow from a high-pressure area of ​​the compression chamber to flow unidirectionally to the discharge chamber through the first channel; a second channel connecting the discharge chamber and the at least one second 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 airflow from a medium-pressure area of ​​the compression chamber to flow unidirectionally to the discharge chamber through the second channel.

[0006] Optionally, the scroll compressor also includes an intermediate injection pipeline, and at least one intermediate suction hole is provided on the fixed scroll disk. The valve seat also includes: a third channel, and the third channel connects the at least one intermediate suction hole with the intermediate injection pipeline of the scroll compressor to guide the airflow into the medium pressure zone.

[0007] Optionally, the valve seat also includes a fourth channel, which connects the first channel with the outside of the compression chamber; the valve assembly also includes: a third one-way valve assembly, which is arranged in the fourth channel, and the third one-way valve assembly is configured to allow air flow from the outside of the compression chamber to flow into the compression chamber in one direction through the fourth channel when the movable 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 the first channel.

[0009] Optionally, the valve assembly further includes a first sealing ring disposed between the valve plate and the valve seat, wherein a diameter of the first sealing ring is larger than the first channel and smaller 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 static 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 limiter includes a base and a fixing portion extending along a first direction perpendicular to the base, the fixing portion is used to fix the limiter on the first surface; the projection of the fixing portion on the first surface covers at least a partial area of ​​the first sealing ring.

[0012] Optionally, the second one-way valve assembly includes: a first blocking member, arranged in the second channel, for opening and closing the second channel; a first elastic member, abutting against the first blocking member to apply a thrust to the first blocking member toward one side of the static scroll.

[0013] Optionally, the third one-way valve assembly includes: a second blocking member and a second elastic member arranged in the fourth channel; when the movable scroll rotates forward, the second elastic member abuts against the second blocking member 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 movable scroll rotates reversely, the second elastic member is elastically deformed under the action of the airflow outside the compression chamber and separates from the second blocking member, so that the airflow outside the compression chamber flows to the compression chamber through the fourth channel.

[0014] Optionally, the shell 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, which is arranged between the valve seat and the inner cover for sealing the discharge chamber.

[0015] Optionally, a second groove is provided on a side of the valve seat away from the static scroll, and the second sealing ring is provided in the second groove.

[0016] Optionally, the static scroll includes a first base plate, and two second exhaust holes are provided on the static scroll, and the two second exhaust holes are centrally symmetrical along the axis of the first base plate.

[0017] Optionally, four intermediate air suction holes are further provided on the static vortex, two adjacent intermediate air suction holes form a group, and the two groups of intermediate air suction holes are symmetrically arranged relative to the axis of the static vortex.

[0018] In a second aspect, a scroll compressor is provided, comprising the valve assembly according to the first aspect.

[0019] Compared to the solutions of the prior art, in the scroll compressor provided in the embodiment of the present application, an independent valve assembly is provided on the static scroll, and multiple channels for exhaust, intermediate exhaust, and intermediate injection are formed on the valve assembly by milling or drilling. Moreover, by separating the valve assembly from the static scroll, only the side of the static scroll close to the valve assembly needs to be rough-machined to meet the various functional requirements of the compressor. By implementing the technical solutions of the embodiment of the present application, the machining process of the static scroll and thus the assembly process of the scroll compressor can be simplified, the manufacturing cost of the static scroll can be reduced, and the compressor has better economic efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] FIG1 is a schematic structural diagram of a scroll compressor provided in an embodiment of the present application.

[0021] FIG. 2 is a partial axial side view of the scroll compressor in FIG. 1 .

[0022] FIG3 is a cross-sectional view taken along line AA in FIG2 .

[0023] FIG4 is a BB cross-sectional view in FIG1 .

[0024] FIG5 is a schematic structural diagram of a valve assembly provided in an embodiment of the present application.

[0025] FIG6 is a CC cross-sectional view of FIG5 .

[0026] FIG7 is a DD cross-sectional view in FIG3 .

[0027] FIG8 is a partial enlarged view of the E region in FIG3 .

[0028] FIG9 is a sectional view taken along line FF in FIG8 .

[0029] FIG10 is a cross-sectional view of GG in FIG5 . DETAILED DESCRIPTION

[0030] The embodiments of the present application provide a valve assembly and a scroll compressor. The technical solutions of the present application are further described in detail below through examples and in conjunction with the accompanying drawings. In the specification, identical or similar reference numerals indicate identical or similar components. The following description of the embodiments of the present application with reference to the accompanying drawings is intended to explain the overall concept of the present application and should not be construed as limiting the present application.

[0031] The valve assembly provided in the embodiment of the present application is applied to a scroll compressor. The scroll compressor provided in the embodiment of the present application is first introduced in detail below with reference to the accompanying drawings.

[0032] FIG1 is a schematic structural diagram of a scroll compressor 10 provided in an embodiment of the present application, FIG2 is a partial axonometric diagram of the scroll compressor in FIG1 , and FIG3 is an AA cross-sectional view in FIG2 .

[0033] As shown in FIG. 1 to FIG. 3 , the scroll compressor 10 provided in the embodiment of the present application includes: a casing 11 , a fixed scroll 12 , a movable scroll 13 , a valve assembly 14 , and the like.

[0034] The casing 11 is generally cylindrical and is used to form a cylindrical closed space of the scroll compressor 10 , thereby accommodating the fixed scroll 12 , the movable scroll 13 , the valve assembly 14 and other components.

[0035] 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 using fasteners.

[0036] Each part of the shell 11 can be manufactured by machining metal sheets. For example, the top cover 111, the inner cover 112 and the lower shell 114 can be formed by stamping metal sheets, and the middle shell 113 can be formed by winding and welding metal sheets.

[0037] The top cover 111 and the inner cover 112 are connected by welding or interference fit. The top cover 111 and the inner cover 112 and the valve assembly 14 together form a discharge chamber 15 of the compressor 10 .

[0038] A frame 16 is provided in the inner cavity of the shell 11 , and the outer circumference of the frame 16 cooperates with the inner circumference of the shell 11 and is fixedly connected to the shell 11 .

[0039] The fixed scroll 12 is fixedly disposed in the inner cavity of the casing 11 and is fixedly connected to the frame 16 .

[0040] The movable scroll 13 is disposed in the inner cavity of the casing 11 and is rotatably supported on the frame 16 .

[0041] Figure 4 is a cross-sectional view taken along line BB in Figure 1 , illustrating a partial structure of the fixed scroll 12. As shown in Figure 4 , the fixed scroll 12 includes a first baseplate 121 and a first scroll 122 disposed on the first baseplate 121. It will be understood that the first baseplate 121 is a disc-shaped rotating structure, and the first scroll 122 extends along the axis of the first baseplate 121. The first scroll 122 is helical and extends around the axis in a direction away from the axis.

[0042] Continuing with Figures 1-3 , the orbiting scroll 13 includes a second base plate 131 and a second scroll wrap 132 disposed on the second base plate 131. Similar to the fixed scroll 12, the second base plate 131 in the orbiting scroll 13 is a disc-shaped, rotating structure, and the second scroll wrap 132 extends along the axis of the second base plate 131 and is also helical.

[0043] The second scroll 132 of the orbiting scroll 13 and the first scroll 122 of the fixed scroll 12 are correspondingly arranged, and the two scrolls mesh with each other to form a series of crescent-shaped compression chambers 17. As is known to those skilled in the art, the compression chamber formed by the meshing of the fixed and orbiting scrolls is divided into multiple compression zones: the area near the center of the compression chamber is a high-pressure zone, the area near the gas inlet of the compression chamber is a low-pressure zone, and the area between the high-pressure and low-pressure zones is an intermediate-pressure zone.

[0044] A driving device 18 is fixedly provided at the lower end of the frame 16, and its output end is connected to the movable scroll 13. When the scroll compressor 10 is working, the driving device 18 can be connected to the movable 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 movable scroll 13, so that the power of the driving device 18 is output to the movable scroll 13 through the crankshaft, driving the movable scroll 13 to perform a small radius rotational translation around the base circle center of the fixed scroll 12, thereby gradually pushing the crescent-shaped compression chamber 17 formed between the fixed scroll 12 and the movable scroll 13 toward the center, and gradually reducing the volume of the compression chamber 17, so that the pressure of the medium to be compressed in the compression chamber 17 gradually increases, and is finally discharged to the discharge chamber 15 through the center of the fixed scroll 12.

[0045] The fixed scroll 12 and the movable scroll 13 may be obtained by separately processing the base plate (121, 131) and the scroll (122, 132) and then fixing them together by welding or the like; or the base plate (121, 131) and the scroll (122, 132) may be obtained by integral molding. For example, a scroll blank may be obtained by casting and then fine-processed to obtain the scrolls (12, 13).

[0046] Referring again to FIG. 4 , the fixed scroll 12 in FIG. 4 further includes a first exhaust hole 123 , a second exhaust hole 124 and a middle air intake hole 125 .

[0047] The first exhaust hole 123 is provided at the center of the first substrate 121 and passes through the first substrate 121 for discharging the medium in the high pressure area of ​​the compression chamber 17 (ie, the area near the center of the compression chamber 17 ).

[0048] Second vent holes 124 are provided on and through the first substrate 121 and are used to discharge the medium in the intermediate-pressure region of the compression chamber 17. There may be one or more second vent holes 124. It should be understood that the projection of the second vent holes 124 along the axis of the first substrate 121 coincides with the intermediate-pressure region of the compression chamber 17, allowing the medium at intermediate pressure in the compression chamber 17 to be discharged through the second vent holes 124.

[0049] The embodiment of the present application does not limit the number of second exhaust holes 124 on the static scroll 12. For example, only one second exhaust hole may be provided. Alternatively, as a more optimal implementation method, multiple second exhaust holes may be provided on the static scroll 12. For example, the static scroll 12 shown in FIG4 is provided with two second exhaust holes 124. The two second exhaust holes 124 are centrally symmetrical along the axis of the first substrate 121. Such a setting can balance the pressure in the compression chamber 17, thereby further improving efficiency.

[0050] The fixed scroll 12 in FIG4 also includes a central intake port 125 disposed on and extending through the first base plate 121. It should be noted that the central intake port 125 on the fixed scroll 12 is typically used in air conditioning or heat pump systems with an air injection enthalpy increase function to direct the medium in the central injection channel into the intermediate pressure region 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 intake ports 125.

[0051] 1 to 3 , the valve assembly 14 in the scroll compressor is disposed on a side of the fixed scroll 12 away from the orbiting scroll 13 . Furthermore, the discharge chamber 15 mentioned above is formed between the valve assembly 14 and the housing 11 .

[0052] As shown in Figure 3, the valve assembly 14 provided in the embodiment of the present application comprises at least: 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.

[0053] FIG5 is a schematic structural diagram of the valve assembly 14 provided in an embodiment of the present application. For ease of understanding, FIG5 also shows a partial structure of the static scroll 12 .

[0054] 3 and 5 , the valve seat 141 is a rotating body, and the valve seat 141 can be formed by metal turning or milling; or, as an implementation method, the valve seat 141 can also be made by casting or 3D printing.

[0055] The valve seat 141 is provided with a first channel 1411 , a second channel 1412 and a third channel 1413 , and the multiple channels are provided corresponding to the multiple holes on the fixed scroll 12 .

[0056] Among them, the first channel 1411 (also called the exhaust channel) passes through the valve seat 141 along the axial direction of the valve seat 141, and is used to connect the first exhaust hole 123 of the static scroll 12 with the discharge chamber 15 of the scroll compressor, so that the medium in the high-pressure area of ​​the compression chamber 17 can flow to the discharge chamber 15 through the first exhaust hole 123 and the first channel 1411.

[0057] In some embodiments, the first channel 1411 is a circular through hole, and the diameter of the first channel 1411 is larger than the first exhaust hole 123 of the fixed scroll.

[0058] 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 turning or milling.

[0059] The second passage 1412 (also called the intermediate exhaust passage) is used to connect the discharge chamber 15 and the second exhaust hole 124 of the fixed scroll 12, so that the medium in the intermediate pressure area of ​​the compression chamber 17 can flow to the discharge chamber 15 through the second exhaust hole 124 and the second passage 1412. There can be one or more second passages 1412.

[0060] It is understandable that the number of the second channels 1412 in the valve seat 141 should be the same as the number of the second exhaust holes 124 on the fixed scroll 12 .

[0061] Figure 6 is a cross-sectional view taken along line CC in Figure 5 , and Figure 7 is a cross-sectional view taken along line DD in Figure 3 . Figure 6 illustrates a possible implementation of the aforementioned second channel 1412. 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 herein refers to a direction parallel to the axis of rotation of the valve seat 141.

[0062] As shown in Figure 6, the first axial channel 1412a extends from the lower surface of the valve seat 141 (i.e., the side close to the static vortex 12) to the side away from the static vortex 12. The first axial channel 1412a is used to install the second one-way valve assembly 143. The structure of the second one-way valve assembly 143 and its setting method will be described in detail later.

[0063] The first groove 1412 b is provided on the lower surface of the valve seat 141 , and a first end thereof is communicated with the first axial channel 1412 a .

[0064] The second axial channel 1412c starts from the upper surface of the valve seat 141 (ie, the side away from the static scroll 12), extends downward in a direction perpendicular to the upper surface, and penetrates the second end of the first groove 1412b.

[0065] In some embodiments, the first axial channel 1412 a and the second axial channel 1412 c may be processed by drilling, and the first groove 1412 b may be processed by milling the lower surface of the valve seat 141 .

[0066] It should be understood that the shape of the second channel 1412 shown in Figure 6 is only an example and does not constitute a limitation on the technical solution of the present application. The second channel 1412 can pass through the valve seat 141 along any path as long as it can connect the second exhaust hole 124 on the static scroll 12 and the discharge chamber 15 of the scroll compressor.

[0067] The valve seat 141 in the embodiment of the present application is also provided with a third channel 1413 (also known as an intermediate injection channel or a wet injection channel), which connects 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.

[0068] Figure 7 illustrates a possible implementation of the third channel 1413. For ease of understanding, Figure 7 also shows a partial structure of the fixed scroll 12, which is provided with four intermediate intake holes 125. Two adjacent intermediate intake holes 125 form a group, and the two groups of intermediate intake holes 125 shown in the figure are symmetrically arranged relative to the axis of the fixed scroll 12. This ensures that when the medium enters the intermediate pressure zone of the compression chamber 17 through the intermediate intake holes 125, the pressure in the two intermediate pressure zones corresponding to the two groups of intermediate intake holes 125 is balanced.

[0069] It should be noted that the arrangement of the four intermediate air intake holes 125 shown in Figure 7 is only an example. The embodiment of the present application does not limit the specific position of the intermediate air intake holes 125 on the static scroll 12, as long as the medium can flow to the medium-pressure area of ​​the compression chamber 17.

[0070] The embodiment of the present application does not limit the arrangement of the above-mentioned intermediate air intake holes 125. When the number of the intermediate air intake holes 125 is greater than two, the multiple intermediate air intake holes 125 can be arranged to be symmetrical with respect to the axis of the static scroll 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.

[0071] The third channel 1413 shown in FIG. 7 includes a first radial channel 1413 a and a second groove 1413 b .

[0072] When the valve seat 141 is fixed on the fixed scroll 12 , the second groove 1413 b is connected to the middle air suction hole 125 on the fixed scroll 12 .

[0073] The first radial channel 1413a starts from the outer circumferential surface of the valve body and extends in the radial direction to connect 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 hole 125 through the first radial channel 1413a and the second groove 1413b.

[0074] In some embodiments, the second groove 1413 b can be processed on the lower surface of the valve seat 141 by milling or other methods, and the first radial channel 1413 a can be formed by drilling.

[0075] Referring again to FIG. 3 , the first one-way valve assembly 142 in the valve assembly 14 is disposed on a side of the valve seat 141 away from the fixed scroll 12 (ie, an upper surface of the valve seat 141 ).

[0076] The first one-way valve assembly 142 is configured to allow air flow to flow from the compression chamber 17 to the discharge chamber 15 through the first passage 1411 in a one-way manner.

[0077] 3 further includes a second one-way valve assembly 143 disposed in the second passage 1412. The second one-way valve assembly 143 may be one or more.

[0078] The second one-way valve assembly 143 is configured to allow air flow to flow from the compression chamber 17 to the discharge chamber 15 through the first passage 1411 in one direction.

[0079] The specific structure of the first one-way valve assembly 142 will be described in detail below with reference to FIG. 8 . FIG. 8 is a partial enlarged view of the E region in FIG. 3 .

[0080] As shown in FIG8 , the first one-way valve assembly 142 may include a stopper 1421 and a valve plate 1422. The stopper 1421 may be fixedly connected to the valve seat 141 via a threaded fastener, such as a bolt or screw. The stopper 1421 is used to enclose the valve plate 1422 between the stopper 1421 and the valve seat 141 to limit the vertical movement of the valve plate 1422.

[0081] The limiter 1421 in the embodiment of the present application includes a base 1421 a and a fixing portion 1421 b extending along a first direction perpendicular to the base 1421 a . The fixing portion 1421 b is used to fix the limiter 1421 on the upper surface of the valve seat 141 .

[0082] The valve plate 1422 in the embodiment of the present application is a circular plate-shaped structure with a diameter larger than the first channel 1411. When the compressor is not started, the valve plate 1422 is in the first position due to 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 compressor's exhaust channel and the medium in the discharge chamber 15 from flowing into the compression chamber 17. When the compressor is started and the pressure in the high-pressure area of ​​the compression chamber 17 is lower than the back pressure of the discharge chamber 15, the valve plate 1422 is pressed against the surface of the valve seat 141 due to its own weight and the back pressure of the discharge chamber 15. When the compressor is operating normally, the airflow in the compression chamber 17 pushes the valve plate 1422 upward and moves it to the second position, thereby allowing the medium in the compression chamber 17 to flow to the discharge chamber 15 via the exhaust port and the first channel 1411.

[0083] In some embodiments, the valve assembly 14 also includes a first sealing ring 144 arranged between the valve plate 1422 and the valve seat 141. The diameter of the first sealing ring 144 is larger than the first channel 1411 and smaller 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 on the sealing ring to seal the gap between the valve plate 1422 and the valve seat 141.

[0084] In some embodiments, the first sealing ring 144 is made of an elastic material, such as PEEK (polyetheretherketone).

[0085] Please refer to Figure 5 and Figure 8 at the same time. The valve seat 141 provided in the embodiment of the present application is provided with a first annular groove 1414. 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.

[0086] The depth of the above-mentioned first annular groove 1414 is set to be smaller 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 and face the first surface of the first one-way valve assembly 142 (i.e., the upper surface of the valve seat 141) with the valve seat 141.

[0087] The base 1421a and the fixing portion 1421b of the stopper 1421 together form a cylindrical accommodation space within which the valve plate 1422 can move up and down. As the valve plate 1422 moves from its topmost point to its bottommost point, where it contacts the first sealing ring 144, it exerts a downward impact force on the first sealing ring 144, causing it to elastically deform. Under the action of this elastic force, the first sealing ring 144 may be pulled out of the first annular groove 1414, causing it to fail.

[0088] Therefore, in some embodiments, the fixing portion 1421b can be used to further constrain the first sealing ring 144. Specifically, see Figure 9, which is a cross-sectional view taken along line FF in Figure 8. At least a portion of the first sealing ring 144 is covered by the fixing portion 1421b, thereby constraining the first sealing ring 144 within the first annular groove 1414.

[0089] In order 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 middle diameter D4 of the first sealing ring 144, thereby ensuring that the first sealing ring 144 can be constrained by the fixing portion 1421b in the first annular groove 1414, and at the same time, ensuring a better sealing effect between the sealing ring and the valve plate 1422.

[0090] In some embodiments, a fourth channel 1415 (also called a reverse exhaust channel) is further provided on the valve seat 141 for connecting the first channel 1411 and the outside of the compression chamber 17 .

[0091] Figure 10 is a cross-sectional view GG in Figure 5 , illustrating a possible implementation of fourth channel 1415. As shown in Figure 10 , fourth channel 1415 is disposed radially along valve seat 141. Fourth channel 1415 originates from the outer circumferential surface of valve seat 141 and terminates at first channel 1411, thereby connecting first channel 1411 with the outer side of the outer circumferential surface of valve seat 141.

[0092] The valve assembly 14 provided in the embodiment of the present application also includes a third one-way valve assembly 145 arranged in the fourth channel 1415. The third one-way valve assembly 145 is configured to allow air flow from the outside of the compression chamber 17 to flow into the compression chamber 17 through the fourth channel 1415 when the movable scroll 13 rotates in the opposite direction.

[0093] The specific structures of the second one-way valve assembly 143 and the third one-way valve assembly 145 will be described in detail below with reference to the accompanying drawings.

[0094] As shown in FIG. 6 , the structure of the second one-way valve assembly 143 is shown. 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 .

[0095] The second one-way valve assembly 143 also 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 thrust to the first blocking member 1431 toward one side of the static vortex, thereby closing the second channel 1412.

[0096] As mentioned above, the second channel 1412 in the valve seat 141 is connected to the second exhaust hole 124 on the fixed scroll 12, and can discharge the airflow in the intermediate pressure area to the discharge chamber 15. Specifically, when the back pressure of the discharge chamber 15 is greater than the pressure in the intermediate pressure area 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 of the second exhaust hole 124. When the pressure in the intermediate pressure area is greater than the back pressure of the discharge chamber 15, the first blocking member 1431 is pushed open by the airflow, and the second channel 1412 is opened, thereby allowing the airflow in the intermediate pressure area to enter the discharge chamber 15.

[0097] By setting the second one-way valve assembly 143, when the compressor is used in a medium-pressure scenario, the medium in the medium-pressure zone can be discharged through the second one-way valve assembly 142 and the second channel 142 to meet the usage requirements without compressing the medium to the maximum pressure. This can improve the energy efficiency of the compressor and reduce the noise of the compressor operation.

[0098] FIG10 shows the structure of the third one-way valve assembly 145 in the embodiment of the present application. The third one-way valve comprises a second blocking member 1451 and a second elastic member 1452 .

[0099] As shown in Figure 10, when the movable scroll 13 rotates forward, the pressure in the compression chamber 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 of the compression chamber 17, thereby preventing the high-pressure airflow in the compression chamber 17 from flowing out through the fourth channel 1415.

[0100] When the movable scroll 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 internal and external pressure difference, the second elastic member 1452 is deformed and separated 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 to the compression chamber 17.

[0101] By providing the third one-way valve assembly 145 in the fourth passage 1415 , it is possible to ensure that the compression chamber 17 is not drawn into a vacuum state when the orbiting scroll 13 reverses, thereby avoiding wear between the orbiting scroll 13 and the fixed scroll 12 .

[0102] Continuing with FIG10 , the second elastic member 1452 in the third one-way valve assembly 145 can be an elastic metal sheet. The elastic metal sheet is a sheet-like structure with a protrusion in the middle, which faces the second blocking member 1451. The edge of the elastic metal sheet is circumferentially provided with multiple notches. The second blocking member 1451 is fixed in the fourth channel 1415 and has a central hole. When the movable scroll 13 rotates forward, the protrusion of the elastic metal sheet fits against the edge of the central hole of the second blocking member 1451, thereby closing the fourth channel 1415. When the movable scroll 13 rotates backward, the elastic metal sheet undergoes elastic deformation under the action of air pressure, and its protrusion separates from the edge of the central hole. The airflow flows through the central hole of the second blocking member 1451 and the multiple notches of the elastic metal sheet to the compression chamber 17.

[0103] As mentioned in the description of Figures 1-3 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. The top cover 111, the inner cover 112, and the valve assembly 14 together form a discharge chamber 15 of the compressor. The discharge chamber 15 typically has a relatively high pressure and needs to be sealed to prevent leakage of the compressed medium.

[0104] Therefore, in some embodiments, as shown in FIG. 3 , the valve assembly 14 further includes a second sealing ring 146 . The second sealing ring 146 is disposed between the valve seat 141 and the inner cover 112 to seal the discharge chamber 15 .

[0105] In some embodiments, a second annular groove 1416 is provided on the valve seat 141 . The second annular groove 1416 is provided on a side of the valve seat 141 away from the static scroll 12 and is used for installing the second sealing ring 146 .

[0106] In the scroll compressor provided in the embodiments of the present application, a separate valve assembly is provided on the stationary scroll, and multiple channels for exhaust, intermediate exhaust, and intermediate injection are formed in the valve assembly by milling or drilling. Furthermore, by separating the valve assembly from the stationary scroll, only rough machining of the surface of the stationary scroll closest to the valve assembly is required. This technical solution can reduce the manufacturing cost of the stationary scroll and is economical.

[0107] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0108] 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 the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0109] In this application, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0110] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0111] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present 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 any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0112] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A valve assembly for a scroll compressor, the scroll compressor comprising: A housing; a fixed scroll, arranged in the housing, the fixed scroll being provided with a first exhaust hole and at least one second exhaust hole; a movable scroll, arranged in the housing, the movable scroll and the fixed scroll cooperating to form a compression chamber, characterized in that: The valve assembly is arranged on a side of the fixed scroll away from the movable scroll, and forms a discharge chamber 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 comprises: a first passage connecting the discharge chamber and the first exhaust hole, wherein the first one-way valve assembly is disposed on a side of the valve seat away from the stationary scroll, and the first one-way valve assembly is configured to allow airflow to flow from the high-pressure area of ​​the compression chamber to the discharge chamber through the first passage in one direction; A second channel connects the discharge chamber with the at least one second exhaust hole, and the second one-way valve assembly is arranged in the second channel, and the second one-way valve assembly is configured to allow air flow to flow from the medium-pressure area of ​​the compression chamber to the discharge chamber in one direction through the second channel.

2. The valve assembly according to claim 1, characterized in that The scroll compressor further includes an intermediate injection pipeline, the fixed scroll is further provided with at least one intermediate suction hole, and the valve seat further includes: A third passage is connected to the at least one intermediate suction hole and an intermediate injection pipeline of the scroll compressor to guide the airflow into the intermediate pressure area.

3. The valve assembly according to claim 1 or 2, characterized in that: The valve seat further includes a fourth channel, wherein the fourth channel communicates the first channel with the outside of the compression chamber; The valve assembly further comprises: A third one-way valve assembly is disposed in the fourth passage, and is configured to allow airflow to flow from outside the compression chamber to the compression chamber in one direction through the fourth passage when the movable scroll rotates in the reverse direction.

4. The valve assembly according to any one of claims 1 to 3, characterized in that: The first one-way valve assembly includes a stopper and a valve plate; Wherein, the limiter 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 channel, and the diameter of the valve plate is larger than the first channel.

5. The valve assembly according to claim 4, characterized in that The valve assembly further comprises: A first sealing ring is disposed between the valve plate and the valve seat, wherein a diameter of the first sealing ring is larger than the first channel and smaller than or equal to that of the valve plate.

6. The valve assembly according to claim 5, characterized in that 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 a 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 stopper comprises: a substrate; and A fixing portion is formed and extended along a first direction perpendicular to the base, the fixing portion is used to fix the limiter on the first surface, and the 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 any one of claims 1 to 7, characterized in that: The second one-way valve assembly comprises: a first blocking member, disposed in the second passage, and used for opening and closing the second passage; The first elastic member abuts against the first blocking member to apply a thrust to the first blocking member toward one side of the fixed scroll.

9. The valve assembly according to claim 3, characterized in that The third one-way valve assembly includes a second blocking member and a second elastic member disposed in the fourth channel; When the movable scroll rotates forward, the second elastic member abuts against the second blocking member 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 movable scroll reverses, the second elastic member is elastically deformed by the airflow outside the compression chamber and is separated from the second blocking member, so that the airflow outside the compression chamber flows into the compression chamber through the fourth channel.

10. The valve assembly according to any one of claims 1 to 9, characterized in that 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 together form the discharge chamber; The valve assembly further comprises a second sealing ring, which is arranged between the valve seat and the inner cover and is used for sealing the discharge chamber.

11. The valve assembly according to claim 10, characterized in that A second annular groove is arranged on a side of the valve seat away from the stationary scroll, and the second sealing ring is arranged in the second annular groove.

12. The valve assembly according to any one of claims 1 to 11, characterized in that The stationary scroll includes a first substrate. Two second exhaust holes are arranged on the stationary scroll. The two second exhaust holes are centrally symmetrical along the axis of the first substrate.

13. The valve assembly according to claim 2, characterized in that The static vortex disk is also provided with four intermediate air suction holes, two adjacent intermediate air suction holes form a group, and the two groups of intermediate air suction holes are symmetrically arranged relative to the axis of the static vortex disk.

14. A scroll compressor, characterized in that: The scroll compressor comprises a valve assembly according to any one of claims 1 to 13.

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