One-way valve assembly of scroll compressor and scroll compressor

Abstract

The utility model relates to a one-way valve assembly of a scroll compressor and the scroll compressor. In particular, a one-way valve assembly of a scroll compressor is provided, the scroll compressor includes a compression mechanism having a first scroll, and an interior space of the scroll compressor is divided into a high pressure region and a low pressure region, the first scroll includes a hub defining a hub cavity, the one-way valve assembly allows the working fluid compressed by the compression mechanism to flow to the high-pressure area, the one-way valve assembly is suitable for being installed in the hub cavity, the one-way valve assembly comprises a cylindrical part extending in the longitudinal direction of the scroll compressor, and an exhaust hole is formed in the side wall of the cylindrical part; and the valve plate is used for covering the exhaust hole. According to the one-way valve assembly, the axial space is fully utilized, and therefore more exhaust orifices and valve plates can be installed.

Description

Technical Field

[0001] The utility model relates to the field of scroll compressors, in particular to a one-way valve assembly of a scroll compressor. Background Art

[0002] The contents in this section merely provide background information related to the present disclosure and may not constitute prior art.

[0003] In the scroll compressor of the related art, a one-way valve assembly is provided at the exhaust port of the compression mechanism of the compressor to prevent under-compression of gas and backflow of high-pressure gas during shutdown, thereby improving the compressor performance. Figure 1 To describe the structure and working principle of the one-way valve assembly of the scroll compressor of the related art.

[0004] Figure 1 It is a cross-sectional view of the compression mechanism and the top cover part of the scroll compressor of the related art. The scroll compressor includes a compression mechanism for compressing a fluid, and the compression mechanism includes a fixed scroll 201, and the fixed scroll 201 includes a hub extending upward from the end plate 202 of the fixed scroll 201, and the hub defines a hub cavity. An exhaust port penetrating the end plate 202 is provided in the end plate 202 of the fixed scroll 201, and the exhaust port connects the interior of the compression mechanism with the hub cavity of the fixed scroll 201. In the hub cavity of the fixed scroll 201, a one-way valve assembly 203 is provided at the exhaust port. The one-way valve assembly 203 is a reed valve, and its valve plate can completely cover the exhaust port. During the operation of the compressor, the pressure difference on the valve plate caused by the impact force of the fluid compressed by the compression mechanism is sufficient to open the valve plate of the one-way valve assembly and discharge it to the high-pressure area through the exhaust port. When the compressor is in the shutdown state, the pressure in the high-pressure area is greater than that in the low-pressure area. Therefore, the valve plate of the one-way valve assembly remains closed, so that the gas in the high-pressure area cannot flow to the low-pressure area, thereby reducing the risk of idling of the eccentric shaft of the compressor and improving the reliability of the compressor.

[0005] The main disadvantage of the one-way valve assembly of the scroll compressor of the related art is that when the compressor displacement increases, more exhaust ports and corresponding valve plates are required to meet the larger exhaust requirements of the compressor. In the scroll compressor of the related art, since the valve plate of the one-way valve assembly is usually installed in a flat form on the end plate or the muffler plate of the fixed scroll, the space for installing the valve plate is relatively limited, resulting in the inability to set up enough exhaust ports and valve plates.

[0006] Therefore, there is a need for an improved one-way valve assembly for a scroll compressor, which has a larger space for installing valve plates than the related art, so that more valve plates can be installed to meet the needs of large-displacement compressors. Utility Model Content

[0007] This section provides a general summary of the invention, and is not a comprehensive disclosure of the full scope of the invention or all of the features of the invention.

[0008] The purpose of the utility model is to solve one or more of the above-mentioned technical problems. For example, the exhaust valve assembly of the scroll compressor of the technical solution of the utility model has a larger space for installing the exhaust orifice and the valve plate in the longitudinal direction, so that more exhaust orifices and valve plates can be arranged to meet the exhaust requirements of the larger scroll compressor displacement.

[0009] In order to solve one or more of the technical problems mentioned above, according to one aspect of the utility model, a one-way valve assembly of a scroll compressor is provided, the scroll compressor includes a compression mechanism having a first scroll, and the internal space of the scroll compressor is divided into a high-pressure area and a low-pressure area, the first scroll includes a hub portion, the hub portion defines a hub cavity, the one-way valve assembly allows the working fluid compressed by the compression mechanism to flow to the high-pressure area, wherein the one-way valve assembly is suitable for being installed in the hub cavity, the one-way valve assembly includes: a cylindrical portion extending along the longitudinal direction of the scroll compressor, an exhaust orifice is arranged at the side wall of the cylindrical portion; and a valve sheet for covering the exhaust orifice.

[0010] In the above-mentioned one-way valve assembly, the one-way valve assembly can float relative to the first scroll, and the one-way valve assembly also includes a generally cylindrical outer peripheral wall portion, wherein the cylindrical portion is located radially inside the outer peripheral wall portion, and the outer peripheral wall portion is suitable for sealing relative to the hub portion.

[0011] In the above-mentioned one-way valve assembly, the peripheral wall portion includes a first portion located at the lower portion and a second portion located at the upper portion, the second portion having a top sealing portion, which is used to keep the one-way valve assembly sealed relative to the silencer plate of the scroll compressor for separating the high-pressure zone and the low-pressure zone.

[0012] In the above-mentioned one-way valve assembly, the first part and the second part are separate, and the one-way valve assembly also includes a seal, the inner part of the seal is embedded between the first part and the second part and the outer part of the seal is located between the one-way valve assembly and the hub, so as to keep the one-way valve assembly sealed relative to the hub.

[0013] In the above-mentioned one-way valve assembly, the one-way valve assembly further includes a plate portion extending between the bottom end of the first portion of the peripheral wall and the bottom end of the cylindrical portion, and the first portion of the peripheral wall, the cylindrical portion and the plate portion are integrally formed.

[0014] According to another aspect of the utility model, a one-way valve assembly of a scroll compressor is provided, the scroll compressor comprising a compression mechanism having a first scroll and a silencer plate having a central orifice which divides the internal space of the scroll compressor into a high-pressure zone and a low-pressure zone, the one-way valve assembly allowing the working fluid compressed by the compression mechanism to flow to the high-pressure zone, wherein: the one-way valve assembly is suitable for being installed to the central orifice, and the one-way valve assembly comprises: a cylindrical portion which can be located in the high-pressure zone, an exhaust orifice being arranged at the side wall of the cylindrical portion; and a valve sheet for covering the exhaust orifice.

[0015] In the above one-way valve assembly, the one-way valve assembly further comprises an annular mounting portion, the cylindrical portion extends upward from the annular mounting portion, and the one-way valve assembly can be mounted to the muffler plate by means of engagement of the annular mounting portion with the central aperture.

[0016] In the above-mentioned one-way valve assembly, the annular mounting portion includes a flange portion extending radially outward, and the flange portion can abut against the bottom surface of the muffler plate.

[0017] In the above-mentioned one-way valve assembly, the first vortex includes a hub portion defining a hub cavity, and the one-way valve assembly also includes a floating cylinder portion suitable for being installed in the hub cavity in a manner capable of floating relative to the first vortex, the floating cylinder portion having a top sealing portion that can abut against the annular mounting portion.

[0018] In the above-mentioned one-way valve assembly, the scroll compressor further includes a muffler installed on the muffler plate in the high-pressure region and positioned to be able to enclose the cylindrical portion of the one-way valve assembly.

[0019] In the above-mentioned one-way valve assembly, an exhaust hole is also provided at the top wall of the cylindrical portion, and the one-way valve assembly further comprises a top wall valve sheet for covering the exhaust hole at the top wall.

[0020] In the above-mentioned one-way valve assembly, the valve sheet arranged at the side wall of the cylindrical portion is arranged vertically or obliquely or laterally.

[0021] In the one-way valve assembly, the valve plate is an elastic valve plate with a fixed first end and a movable second end, and when the valve plate arranged at the side wall of the cylindrical portion is arranged vertically or obliquely, the first end is higher than the second end.

[0022] In the one-way valve assembly, the valve plate is an elastic valve plate with a fixed first end and a movable second end, and the one-way valve assembly further comprises a valve stop for limiting the movement range of the second end of the valve plate.

[0023] In the one-way valve assembly, the cylindrical portion has a plurality of flat side walls, and an exhaust hole is provided at each flat side wall of the cylindrical portion and a corresponding valve sheet is arranged thereon.

[0024] According to another aspect of the utility model, a scroll compressor is provided. The scroll compressor includes the one-way valve assembly described above.

[0025] The advantages of the suction baffle structure of the scroll compressor according to the utility model are, for example, as described as follows: the exhaust valve assembly of the scroll compressor of the technical solution of the utility model has a longitudinally extending cylindrical portion for setting the exhaust port and the valve plate, and the exhaust port and the valve plate can be set on the side wall of the cylindrical portion, thereby increasing the space for setting the exhaust port and the valve plate, and especially more effectively utilizing the axial space inside the compressor, so that more exhaust ports and valve plates can be set to meet the exhaust requirements of larger scroll compressor displacement; and, the one-way valve assembly is installed in the hub cavity, and in one embodiment, the one-way valve assembly itself also acts as a sealing ring, or the one-way valve assembly is installed at the silencer plate and the cylindrical portion where the valve plate is arranged is located in the high-pressure area, thereby leaving a larger space under the silencer plate for arranging other components. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The following drawings illustrate the technical features of one or more embodiments of the suction baffle structure of the compressor and its related components of the utility model. In the drawings:

[0027] Figure 1 It is a cross-sectional view of a compression mechanism and a top cover portion of a scroll compressor of the related art.

[0028] Figure 2 is a perspective view of a portion of a one-way valve assembly according to a first embodiment of the present utility model;

[0029] Figure 3 is a cross-sectional view of a compression mechanism and a top cover portion of a scroll compressor according to a first embodiment of the utility model, wherein the scroll compressor includes a one-way valve assembly;

[0030] Figure 4 A top view of a fixed scroll and a one-way valve assembly of a scroll compressor according to a first embodiment of the present utility model is shown;

[0031] Figure 5 is a perspective view of a one-way valve assembly according to a second embodiment of the present utility model;

[0032] Figure 6 is a top view of a one-way valve assembly according to a second embodiment of the present utility model;

[0033] Figure 7 is a cross-sectional view of a compression mechanism and a top cover portion of a scroll compressor according to a second embodiment of the present utility model, wherein the scroll compressor includes a one-way valve assembly; and

[0034] Figure 8A top view of a muffler plate and a one-way valve assembly of a scroll compressor according to a second embodiment of the present invention is shown. DETAILED DESCRIPTION

[0035] The utility model is described in detail below with reference to the accompanying drawings and with the help of specific implementation methods. The following detailed description of the utility model is only for illustrative purposes, and is by no means a limitation of the utility model and its application or use.

[0036] The utility model provides an improved one-way valve assembly for a scroll compressor. The one-way valve assembly has a longitudinally extending cylindrical portion so as to fully utilize the axial space of the scroll compressor and provide a larger space for installing valve plates, so that more valve plates can be installed, thereby meeting the exhaust requirements of a larger compressor displacement.

[0037] First, refer to Figure 2-Figure 4 The overall structure and working principle of the one-way valve assembly according to the first embodiment of the present utility model are briefly described.

[0038] Figure 2 is a perspective view of a portion of a one-way valve assembly according to a first embodiment of the present utility model, Figure 3 is a cross-sectional view of a compression mechanism and a top cover portion of a scroll compressor according to a first embodiment of the present utility model, and Figure 4 A top view of a fixed scroll and a one-way valve assembly of a scroll compressor according to a first embodiment of the present invention is shown.

[0039] like Figure 2 and Figure 3 As shown, the one-way valve assembly 80 according to the first embodiment of the utility model includes a cylindrical portion 82 extending in the longitudinal direction, wherein the cylindrical portion 82 defines an internal cavity. In this embodiment, optionally, the one-way valve assembly 80 may also include a peripheral wall portion 81 extending in the longitudinal direction in a substantially cylindrical shape and a plate portion 83 extending between the bottom end of the peripheral wall portion 81 and the bottom end of the cylindrical portion 82, wherein the cylindrical portion 82 is located radially inside the peripheral wall portion 81. The peripheral wall portion 81 includes a first portion 811 located at the bottom and a second portion 812 located at the top, wherein the outer ... Figure 2 Only the first part 811 is shown, while the second part 812 is shown in Figure 3As shown in . The first part 811, the cylindrical portion 82 and the plate portion 83 may be formed integrally. The first part 811 and the second part 812 may be integral or separate, and the second part 812 has a top sealing portion for keeping the peripheral wall portion 81 sealed relative to the muffler plate of the scroll compressor. The cylindrical portion 82 may have a plurality of flat side walls, for example, the cylindrical portion 82 may be in the shape of a polygonal prism. In this embodiment, the cylindrical portion 82 is in the shape of a pentagonal prism and has five flat side walls. In a variation of this embodiment, the cylindrical portion 82 may also have more or fewer flat side walls. An exhaust port 821 (at Figure 3 ) is used to discharge the working fluid from the internal cavity of the cylindrical portion 82. In this embodiment, the exhaust orifice is circular, and the exhaust orifice may also have other suitable shapes. A valve sheet 84 corresponding to each exhaust orifice is also provided on each side wall of the cylindrical portion 82, and the valve sheet 84 is arranged to be able to completely cover the corresponding exhaust orifice, and the valve sheet 84 may be an elastic valve sheet. The valve sheet 84 may have a first end for fixing to the side wall of the cylindrical portion 82 and a second end opposite to the first end, and the second end may swing between a closed position covering the exhaust orifice and an open position opening the exhaust orifice. For example, the second end of the valve sheet 84 may move away from the side wall of the cylindrical portion 82 to move from the closed position to the open position, and may move from the open position toward the side wall of the cylindrical portion 82 to return to the closed position. The valve sheet 84 has a longitudinal axis extending from the first end to the second end. Optionally, the valve plate can be arranged vertically (i.e., the longitudinal axis of the valve plate is parallel to the longitudinal axis of the compressor) or obliquely (i.e., the longitudinal axis of the valve plate forms an angle greater than 0 degrees and less than 90 degrees with the longitudinal axis of the compressor) or transversely (i.e., the longitudinal axis of the valve plate forms an angle of 90 degrees with the longitudinal axis of the compressor), and, in the case where the valve plate is arranged vertically or obliquely, the first end is closer to the top than the second end. In this embodiment, the valve plate 84 is arranged vertically. A valve stop 85 is also provided on each side wall of the cylindrical portion 82, and the valve stop 85 is arranged to form a certain angle with the side wall of the cylindrical portion 82 to limit the range of motion of the second end of the valve plate 84. On the side wall of the cylindrical portion 82, a threaded hole is provided at a certain distance from the exhaust port, and a through hole is provided on the first end of the valve plate 84 and the fixed end of the valve stop 85, so that the valve plate 84 and the valve stop 85 can be fixed to the side wall of the cylindrical portion 82 by bolts 86. In this embodiment, the exhaust holes and valve plates are only provided on the side wall of the cylindrical portion. However, in a variation of this embodiment, the exhaust holes and corresponding top wall valve plates may be provided on the top wall of the cylindrical portion, so as to further increase the number of exhaust holes and valve plates, thereby meeting the exhaust requirements of a larger compressor displacement.

[0040] like Figure 3 and Figure 4As shown, the scroll compressor according to the utility model includes a housing 20, a top cover 30 arranged at one end of the housing 20, a bottom cover (not shown) arranged at the other end of the housing 20, and a muffler 40 arranged between the top cover 30 and the housing 20 to separate the internal space of the compressor into a high-pressure area and a low-pressure area. The high-pressure area is formed between the muffler 40 and the top cover 30, and the low-pressure area is formed between the muffler 40, the housing 20 and the bottom cover. An intake joint (not shown) for sucking fluid is provided in the low-pressure area, and an exhaust joint 50 for discharging compressed fluid is provided in the high-pressure area. A motor (not shown) composed of a stator and a rotor is provided in the housing 20. A drive shaft is provided in the rotor to drive a compression mechanism for compressing fluid composed of a fixed vortex (i.e., a first vortex) 60 and a movable vortex (i.e., a second vortex) 70. The muffler 40 is annular and defines a central orifice. An insert 41 is provided in the central orifice of the muffler plate 40, and the flange of the insert 41 can abut against the bottom surface of the muffler plate 40 to maintain an interference fit with the muffler plate 40, thereby sealingly fixing the insert 41 in the central orifice of the muffler plate 40. An exhaust passage is provided in the insert 41 to allow the working fluid discharged from the one-way valve assembly 80 to enter the high-pressure area of ​​the compressor. It should be noted that the insert is optional, and the muffler plate may not be provided with the insert. The fixed scroll 60 includes an end plate 61 and an exhaust port formed in the end plate to allow the working fluid compressed by the compression mechanism to discharge the compression mechanism through the exhaust port. The fixed scroll 60 also includes a hub 62 formed by extending upward from the end plate, and the hub 62 is cylindrical and can define a hub cavity. In the assembled scroll compressor, the one-way valve assembly 80 is suitable for being installed in the hub cavity of the fixed scroll 60, so that the working fluid discharged from the exhaust port of the fixed scroll can directly enter the internal cavity of the cylindrical portion 82 of the one-way valve assembly 80. For example, the one-way valve assembly 80 can be suitable for being installed in the hub cavity of the fixed scroll 60 in a manner that can float relative to the fixed scroll 60. In this embodiment, the first part 811 and the second part 812 of the peripheral wall portion 81 of the one-way valve assembly 80 are split, and they can be kept tightly fixedly connected to each other by fasteners. The second part 812 of the peripheral wall portion 81 of the one-way valve assembly 80 may include a top sealing portion, which can be tightly against the bottom surface of the insert 41 of the muffler plate 40 to keep the one-way valve assembly 80 sealed relative to the muffler plate 40, thereby ensuring that the working fluid does not flow to the high-pressure area through the gap between the one-way valve assembly 80 and the muffler plate 40. In the case where the muffler plate does not have an insert, the top sealing portion of the one-way valve assembly may directly abut against the bottom surface of the muffler plate to keep the one-way valve assembly sealed relative to the muffler plate.The one-way valve assembly 80 may also include a seal 90, the inner portion of which is embedded between the first part 811 and the second part 812, and the outer portion of the seal 90 is located between the first part 811 of the peripheral wall portion 81 of the one-way valve assembly 80 and the inner wall of the hub 62 of the fixed vortex 60, so that the peripheral wall portion 81 of the one-way valve assembly 80 remains sealed relative to the hub 62, thereby ensuring that the working fluid does not flow to the high-pressure area through the gap between the one-way valve assembly 80 and the hub 62.

[0041] The working principle and technical effects obtained by the one-way valve assembly of the scroll compressor according to the first embodiment of the utility model will be described below.

[0042] During the operation of the scroll compressor, the working fluid enters the compression mechanism of the scroll compressor through the air inlet joint, and then is compressed in the compression mechanism, and then the working fluid is discharged from the compression mechanism through the exhaust port provided in the fixed scroll. In the scroll compressor according to the first embodiment of the utility model, the one-way valve assembly is subjected to the pressure of the working fluid discharged from the exhaust port of the compression mechanism and floats upward relative to the fixed scroll to abut against the muffler plate. Since the one-way valve assembly is provided with a top sealing portion, the one-way valve assembly remains sealed relative to the muffler plate; and since the one-way valve assembly has a seal, the one-way valve assembly remains sealed relative to the hub of the fixed scroll, so that the working fluid does not flow to the high-pressure area from the gap between the one-way valve assembly and the muffler plate and the hub of the fixed scroll. The working fluid discharged from the compression mechanism will enter the internal cavity of the cylindrical portion of the one-way valve assembly, so that the pressure in the internal cavity increases, and when the pressure in the internal cavity is greater than the pressure outside the internal cavity and the pressure difference between them is sufficient to push the valve plate covering the exhaust port in the side wall of the cylindrical portion from the closed position to the open position, the valve plate opens (the opening degree of the valve plate will be limited by the valve stop). In this case, the working fluid can flow out of the internal cavity of the cylindrical portion through the exhaust orifice, and then flow to the high-pressure area of ​​the compressor through the exhaust channel in the muffler (or the central orifice of the muffler). As a result, the one-way valve assembly allows the working fluid compressed by the compression mechanism to flow to the high-pressure area. When the scroll compressor stops, since the pressure in the high-pressure area of ​​the compressor is higher than the pressure in the low-pressure area, the valve plate will remain in a closed position to ensure that the fluid in the high-pressure area cannot flow to the low-pressure area, thereby reducing the risk of idling of the eccentric shaft of the compressor and improving the reliability of the compressor. Compared with the related technology of scroll compressors and their one-way valve assemblies, the scroll compressor and its one-way valve assembly according to the first embodiment of the utility model have the following advantages: the exhaust valve assembly has a longitudinally extending cylindrical portion for setting the exhaust orifice and the valve plate, and the exhaust orifice and the valve plate can be set on the side wall of the cylindrical portion, thereby increasing the space for setting the exhaust orifice and the valve plate, and especially more effectively utilizing the axial space inside the compressor, so that more exhaust orifices and valve plates can be set to meet the exhaust requirements of larger scroll compressor displacement; in addition, since the one-way valve assembly is installed in the hub cavity in a manner that it can float relative to the fixed scroll, the one-way valve assembly itself also plays the role of a floating sealing ring, thereby allowing the fixed scroll to have radial flexibility through a simple structure.

[0043] In the following, reference is made to Figure 5-Figure 8The overall structure and working principle of the one-way valve assembly according to the second embodiment of the utility model are briefly described. The main difference between the one-way valve assembly according to the second embodiment and the one-way valve assembly according to the first embodiment is that the one-way valve assembly according to the second embodiment is different in its own configuration and the installation position in the scroll compressor, while the other components and the overall structure of the scroll compressor are basically the same, so the other components and the overall structure of the scroll compressor are only briefly described.

[0044] Figure 5 is a perspective view of a one-way valve assembly according to a second embodiment of the present utility model, Figure 6 is a top view of a one-way valve assembly according to a second embodiment of the present utility model, Figure 7 is a cross-sectional view of a compression mechanism and a top cover portion of a scroll compressor according to a second embodiment of the present utility model, wherein the scroll compressor includes a one-way valve assembly, and Figure 8 A top view of a muffler plate and a one-way valve assembly of a scroll compressor according to a second embodiment of the present invention is shown.

[0045] like Figure 5 and Figure 6 As shown, the one-way valve assembly 800 according to the second embodiment of the utility model includes a circular annular mounting portion 810 and a cylindrical portion 820 extending upward from the annular mounting portion 810, wherein the annular mounting portion 810 includes a flange portion extending radially outward, and the cylindrical portion 820 defines an internal cavity. The cylindrical portion 820 may have a plurality of flat side walls 8201, for example, the cylindrical portion 820 may be in the shape of a truncated cylinder. In this embodiment, the cylindrical portion has three flat side walls. In a variation of this embodiment, the cylindrical portion may also have more or fewer flat side walls. An exhaust port is provided on each side wall 8201 of the cylindrical portion 820 (at Figure 5 and Figure 68201) is used to discharge the working fluid from the internal cavity of the cylindrical portion 820. A valve sheet 840 corresponding to each exhaust orifice is also provided on each side wall 8201 of the cylindrical portion 820, and the valve sheet 840 is arranged to completely cover the corresponding exhaust orifice, and the valve sheet 840 can be an elastic valve sheet. The valve sheet 840 can have a first end for fixing to the side wall 8201 of the cylindrical portion 820 and a second end opposite to the first end, and the second end can swing between a closed position covering the exhaust orifice and an open position opening the exhaust orifice. For example, the second end of the valve sheet 840 can move away from the side wall 8201 of the cylindrical portion 820 to move from the closed position to the open position, and can move from the open position toward the side wall 8201 of the cylindrical portion 820 to return to the closed position. The valve sheet 840 has a longitudinal axis extending from the first end to the second end. Optionally, the valve plate can be arranged vertically (i.e., the longitudinal axis of the valve plate is parallel to the longitudinal axis of the compressor) or obliquely (i.e., the longitudinal axis of the valve plate forms an angle greater than 0 degrees and less than 90 degrees with the longitudinal axis of the compressor) or transversely (i.e., the longitudinal axis of the valve plate forms an angle of 90 degrees with the longitudinal axis of the compressor), and, when the valve plate is arranged vertically or obliquely, the first end is higher than the second end. In this embodiment, the valve plate 840 is arranged obliquely. A valve stop 850 is also provided on each side wall of the cylindrical portion 820, and the valve stop 850 is arranged to form a certain angle with the side wall of the cylindrical portion 820 to limit the range of motion of the second end of the valve plate 840. On the side wall of the cylindrical portion 820, a threaded hole is provided at a certain distance from the exhaust hole, and through holes are provided on the first end of the valve plate 840 and the fixed end of the valve stop 850, so that the valve plate 840 and the valve stop 850 can be fixed to the side wall of the cylindrical portion 820 by bolts 860. In this embodiment, the exhaust hole, the top wall valve plate for covering the exhaust hole, and the top wall valve stop for limiting the movement range of the top wall valve plate are also provided on the top wall 8202 of the cylindrical portion 820, and the installation method of the top wall valve plate and the top wall valve stop is basically the same as the installation method of the valve plate 840 and the valve stop 850. In a variation of this embodiment, the exhaust hole and the top wall valve plate on the top wall may not be provided.

[0046] like Figure 7 and Figure 8As shown, the scroll compressor according to the utility model includes a housing 200, a top cover 300, a bottom cover (not shown), a muffler 400 that divides the internal space of the compressor into a high-pressure zone and a low-pressure zone, and a muffler 900 installed on the muffler 400 in the high-pressure zone. The high-pressure zone is formed between the muffler 400 and the top cover 300, and the low-pressure zone is formed between the muffler 400, the housing 200 and the bottom cover. An intake joint (not shown) for inhaling a working fluid is provided in the low-pressure zone, and an exhaust joint 500 for discharging the compressed working fluid is provided in the high-pressure zone. The scroll compressor also includes a compression mechanism composed of a fixed scroll 600 and a movable scroll 700. The muffler 400 is annular and defines a central orifice. The muffler 900 can be cylindrical, for example, a cylindrical member with a top. The fixed scroll 600 includes an end plate 610 and an exhaust port formed in the end plate 610. The working fluid compressed by the compression mechanism is discharged from the compression mechanism through the exhaust port. The fixed scroll 600 also includes a hub 620 extending upward from the end plate, which is cylindrical and can define a hub cavity. The one-way valve assembly 800 is configured such that the diameter of the flange portion of its annular mounting portion 810 is greater than the diameter of the central orifice of the muffler plate 400, and the diameter of its cylindrical portion 820 is substantially equal to the diameter of the central orifice of the muffler plate 400, so that in the assembled scroll compressor, the flange portion of the annular mounting portion 810 abuts against the bottom surface of the muffler plate 400 and the cylindrical portion 820 forms an interference fit with the central orifice of the muffler plate 400, thereby the one-way valve assembly 800 can be firmly mounted to the muffler plate 400 by means of the engagement of the annular mounting portion 810 with the central orifice of the muffler plate 400. In the assembled scroll compressor, the cylindrical portion 820 of the one-way valve assembly 800 is located in the high pressure area of ​​the compressor, and the muffler 900 is positioned to be able to enclose the cylindrical portion 820 of the one-way valve assembly 800. The scroll compressor according to the second embodiment of the utility model may also include a floating cylinder portion, which is suitable for being installed in the hub cavity of the fixed scroll 600 in a manner that can float relative to the fixed scroll 600 in the assembled scroll compressor. The floating cylinder portion may include a top sealing portion, which can be tightly against the bottom surface of the annular mounting portion 810 of the one-way valve assembly 800 to keep the floating cylinder portion sealed relative to the one-way valve assembly 800.

[0047] The working principle and technical effects obtained by the one-way valve assembly of the scroll compressor according to the second embodiment of the present utility model will be described below.

[0048] During the operation of the scroll compressor, the working fluid enters the compression mechanism of the scroll compressor through the air inlet joint, and then is compressed in the compression mechanism, and then the working fluid is discharged from the compression mechanism through the exhaust port provided in the fixed scroll. In the scroll compressor according to the second embodiment of the utility model, the floating cylinder part is subjected to the pressure of the working fluid discharged from the exhaust port of the compression mechanism and floats upward relative to the fixed scroll to abut against the annular mounting portion of the one-way valve assembly. Since the floating cylinder part is provided with a top sealing part, the floating cylinder part remains sealed relative to the one-way valve assembly. The working fluid discharged from the compression mechanism will enter the internal cavity of the cylindrical part of the one-way valve assembly, so that the pressure in the internal cavity increases. When the pressure in the internal cavity is greater than the pressure outside the internal cavity and the pressure difference between them is sufficient to push the valve plate covering the exhaust orifice in the side wall (and the top wall) of the cylindrical part to swing from the closed position to the open position, the valve plate opens (the opening degree of the valve plate will be limited by the valve stop). In this case, the working fluid can flow out of the internal cavity of the cylindrical part through the exhaust orifice and then enter the high-pressure area of ​​the compressor. In particular, the working fluid discharged from the exhaust orifice in the side wall of the cylindrical portion of the one-way valve assembly first enters the internal space of the muffler, and then enters the high-pressure area of ​​the compressor through the hole set on the muffler. As a result, the one-way valve assembly allows the working fluid compressed by the compression mechanism to flow to the high-pressure area. When the scroll compressor stops, since the pressure in the high-pressure area of ​​the compressor is higher than the pressure in the low-pressure area, the valve plate will remain in a closed position to ensure that the fluid in the high-pressure area cannot flow to the low-pressure area, thereby reducing the risk of idling of the eccentric shaft of the compressor and improving the reliability of the compressor. Compared with the related technology of scroll compressor and its one-way valve assembly, the scroll compressor and its one-way valve assembly according to the second embodiment of the utility model have the following advantages: the exhaust valve assembly has a longitudinally extending cylindrical portion for setting the exhaust port and the valve plate, and the exhaust port and the valve plate can be set on the side wall of the cylindrical portion, thereby increasing the space for setting the exhaust port and the valve plate, and especially more effectively utilizing the axial space inside the compressor, so that more exhaust ports and valve plates can be set to meet the exhaust requirements of larger scroll compressor displacement; in addition, since the one-way valve assembly is installed at the silencer plate and the cylindrical portion where the valve plate is arranged is located in the high-pressure area, a larger space can be reserved under the silencer plate to facilitate the arrangement of other components.

[0049] In addition, it should be noted that, although different technical solutions of the scroll compressor according to the utility model are described in the aforementioned embodiments, it can be understood that the technical solutions in the above embodiments are only illustrative and not restrictive, and various modifications can be adopted. For example, in a modification of the first embodiment, the first part and the second part of the peripheral wall portion are integrated, and a groove can be provided at the portion of the first part for contacting the hub of the fixed scroll, and a seal can be provided in the groove for keeping the one-way valve assembly sealed relative to the hub of the fixed scroll. In another modification of the first embodiment, the cylindrical portion of the one-way valve assembly can have other shapes, such as a truncated cylindrical shape. In another modification of the first embodiment, the one-way valve assembly may not be provided with a peripheral wall portion, but a separate floating sealing ring is used to achieve sealing relative to the muffler plate, thereby separating the low-pressure zone and the high-pressure zone. In a modification of the second embodiment, the cylindrical portion of the one-way valve assembly can have other shapes, such as a polygonal column shape. In another variation of the second embodiment, the muffler may have other shapes, such as a bowl shape, and the muffler is also positioned to enclose the cylindrical portion of the one-way valve assembly.

[0050] Although the present invention has been described with reference to exemplary embodiments, it should be understood that the present invention is not limited to the specific embodiments described and shown in detail herein, and that those skilled in the art may make various changes to the exemplary embodiments without departing from the scope defined by the claims.

Claims

1. A one-way valve assembly of a scroll compressor, the scroll compressor comprising a compression mechanism having a first scroll, and the inner space of the scroll compressor is divided into a high-pressure area and a low-pressure area, the first scroll comprising a hub, the hub defining a hub cavity, the one-way valve assembly allowing a working fluid compressed by the compression mechanism to flow to the high-pressure area, It is characterized in that The one-way valve assembly is suitable for being installed in the hub cavity, and the one-way valve assembly comprises: a cylindrical portion extending in the longitudinal direction of the scroll compressor, wherein a discharge aperture is provided at a side wall of the cylindrical portion; and A valve sheet is used to cover the exhaust hole.

2. The one-way valve assembly according to claim 1, characterized in that: The one-way valve assembly is capable of floating relative to the first scroll, and further comprises a substantially cylindrical outer peripheral wall portion, wherein the cylindrical portion is located radially inside the outer peripheral wall portion, and the outer peripheral wall portion is adapted to be sealed relative to the hub portion.

3. The one-way valve assembly according to claim 2, characterized in that: The peripheral wall portion includes a first portion located at a lower portion and a second portion located at an upper portion, wherein the second portion has a top sealing portion, and the top sealing portion is used to keep the one-way valve assembly sealed relative to a muffler plate of the scroll compressor for separating the high-pressure zone and the low-pressure zone.

4. The one-way valve assembly according to claim 3, characterized in that: The first part and the second part are separate, and the one-way valve assembly also includes a seal, the inner part of the seal is embedded between the first part and the second part and the outer part of the seal is located between the one-way valve assembly and the hub, so as to keep the one-way valve assembly sealed relative to the hub.

5. The one-way valve assembly according to claim 3 or 4, characterized in that: The one-way valve assembly further includes a plate portion extending between a bottom end of the first portion of the peripheral wall portion and a bottom end of the cylindrical portion, and the first portion of the peripheral wall portion, the cylindrical portion, and the plate portion are integrally formed.

6. A one-way valve assembly of a scroll compressor, the scroll compressor comprising a compression mechanism having a first scroll and a muffler plate having a central orifice that divides an inner space of the scroll compressor into a high-pressure area and a low-pressure area, the one-way valve assembly allowing a working fluid compressed by the compression mechanism to flow to the high-pressure area, Features: The one-way valve assembly is adapted to be mounted to the central aperture, and The one-way valve assembly includes: a cylindrical portion that can be located in the high-pressure area, an exhaust hole being provided at a side wall of the cylindrical portion; and a valve sheet for covering the exhaust hole.

7. The one-way valve assembly according to claim 6, characterized in that: The one-way valve assembly further includes an annular mounting portion, the cylindrical portion extending upwardly from the annular mounting portion, and the one-way valve assembly can be mounted to the muffler plate by means of engagement of the annular mounting portion with the central aperture.

8. The one-way valve assembly according to claim 7, characterized in that: The annular mounting portion includes a flange portion extending radially outwardly, and the flange portion is capable of abutting against a bottom surface of the muffler plate.

9. The one-way valve assembly according to claim 7 or 8, characterized in that: The first scroll includes a hub defining a hub cavity, and the one-way valve assembly also includes a floating cylinder portion adapted to be mounted in the hub cavity in a manner capable of floating relative to the first scroll, the floating cylinder portion having a top sealing portion capable of abutting against the annular mounting portion.

10. The one-way valve assembly according to any one of claims 6 to 8, characterized in that: The scroll compressor further includes a muffler installed on the muffler plate in the high pressure region and positioned to enclose a cylindrical portion of the check valve assembly.

11. The one-way valve assembly according to claim 1 or 6, characterized in that: An exhaust hole is also arranged at the top wall of the cylindrical portion, and the one-way valve assembly further comprises a top wall valve sheet for covering the exhaust hole at the top wall.

12. The one-way valve assembly according to claim 1 or 6, characterized in that: The valve sheet arranged at the side wall of the cylindrical portion is arranged vertically, obliquely or laterally.

13. The one-way valve assembly according to claim 1 or 6, characterized in that: The valve plate is an elastic valve plate with a fixed first end and a movable second end, and when the valve plate arranged on the side wall of the cylindrical portion is arranged vertically or obliquely, the first end is higher than the second end.

14. The one-way valve assembly according to claim 1 or 6, characterized in that: The valve plate is an elastic valve plate with a fixed first end and a movable second end, and the one-way valve assembly further includes a valve stop for limiting the movement range of the second end of the valve plate.

15. The one-way valve assembly according to claim 1 or 6, characterized in that: The cylindrical portion has a plurality of flat side walls, and an exhaust hole is provided at each flat side wall of the cylindrical portion and a corresponding valve sheet is arranged thereon.

16. A scroll compressor, characterized in that: The scroll compressor comprises a non-return valve assembly according to any one of claims 1 to 15 .

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