在现有技术中，由于轴向气体力的存在会推动静涡盘朝向远离动涡盘的方向运动，加大了动涡旋齿和静涡旋齿的轴向间隙，增加了径向泄露，一些涡旋式压缩机通过在静涡盘上设有背压孔和与背压孔连通的背压腔，通过背压腔中的气体和弹簧推动静涡盘朝向靠近动涡盘的方向运动，实现动涡盘和静涡盘的径向密封，但这种结构通常存在背压供应不连续的问题。In the prior art, the existence of axial gas force will push the static scroll to move away from the orbiting scroll, thereby increasing the axial clearance between the orbiting scroll and the static scroll, and increasing radial leakage. Some scroll compressors are provided with a back-pressure hole and a back-pressure cavity connected to the back-pressure hole on the static scroll. The gas in the back-pressure cavity and the spring push the static scroll to move toward the orbiting scroll, thereby achieving radial sealing between the orbiting scroll and the static scroll. However, this structure usually has the problem of discontinuous back-pressure supply.

发明内容Summary of the invention

本发明旨在至少解决现有技术中存在的技术问题之一。为此，本发明提出一种涡旋式压缩机，所述涡旋式压缩机性能好、可靠性高，可以保证背压供应的连续性，减小背压腔中的气体压力的波动。The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a scroll compressor, which has good performance and high reliability, can ensure the continuity of back pressure supply, and reduce the fluctuation of gas pressure in the back pressure chamber.

根据本发明实施例的涡旋式压缩机包括：壳体，所述壳体内限定出安装腔；动涡盘和静涡盘，所述动涡盘和所述静涡盘设于所述安装腔内，所述动涡盘和所述静涡盘配合共同限定出压缩腔，所述静涡盘上具有与所述压缩腔连通的静涡盘排气孔；背压机构，所述背压机构设于所述静涡盘的远离所述动涡盘的一侧，所述背压机构为环形，所述背压机构和所述静涡盘之间限定出背压腔，所述背压机构上还具有第一通孔；端盖，所述壳体靠近所述端盖的一侧具有回油隔板，所述端盖与所述回油隔板连接，所述回油隔板上具有第二通孔，所述静涡盘相对所述动涡盘邻近所述端盖设置，所述端盖上具有排气通道，所述回油隔板上具有与所述静涡盘排气孔连通的隔板排气孔，所述端盖上具有连通所述隔板排气孔和所述排气通道的端盖排气孔，所述端盖的朝向所述回油隔板的一侧具有背压管，所述背压管穿设于所述第二通孔和所述第一通孔内以使所述背压腔和所述排气通道连通。According to an embodiment of the present invention, a scroll compressor comprises: a housing, a mounting cavity is defined in the housing; a movable scroll and a stationary scroll, the movable scroll and the stationary scroll are arranged in the mounting cavity, the movable scroll and the stationary scroll cooperate to define a compression cavity, the stationary scroll has a stationary scroll exhaust hole connected to the compression cavity; a back pressure mechanism, the back pressure mechanism is arranged on a side of the stationary scroll away from the movable scroll, the back pressure mechanism is annular, a back pressure cavity is defined between the back pressure mechanism and the stationary scroll, and the back pressure mechanism also has a first through hole; an end cover, the housing is close to One side of the end cover is provided with an oil return baffle, the end cover is connected to the oil return baffle, the oil return baffle is provided with a second through hole, the fixed scroll is arranged adjacent to the end cover relative to the movable scroll, the end cover is provided with an exhaust passage, the oil return baffle is provided with a baffle exhaust hole connected to the fixed scroll exhaust hole, the end cover is provided with an end cover exhaust hole connecting the baffle exhaust hole and the exhaust passage, the end cover is provided with a back pressure pipe on the side of the end cover facing the oil return baffle, the back pressure pipe is penetrated into the second through hole and the first through hole to connect the back pressure chamber and the exhaust passage.

根据本发明实施例的涡旋式压缩机，通过背压腔内的中间压力的气体可以平衡部分轴向气体力，推动静涡盘朝向靠近动涡盘的方向移动，使静涡盘紧贴动涡盘，可以减小动涡旋齿与静涡旋齿的轴向间隙，减少径向泄露，保障涡旋式压缩机的性能和可靠性。并且，通过将背压腔与排气通道连通，避免了现有技术中的动涡旋齿在运行过程中堵住第一通孔的风险，可以保证背压供应的连续性，减小背压腔中的气体压力的波动。According to the scroll compressor of the embodiment of the present invention, the gas at the intermediate pressure in the back pressure chamber can balance part of the axial gas force, push the fixed scroll to move in the direction close to the movable scroll, make the fixed scroll close to the movable scroll, reduce the axial clearance between the movable scroll and the fixed scroll, reduce radial leakage, and ensure the performance and reliability of the scroll compressor. In addition, by connecting the back pressure chamber with the exhaust passage, the risk of the movable scroll blocking the first through hole during operation in the prior art is avoided, the continuity of the back pressure supply can be guaranteed, and the fluctuation of the gas pressure in the back pressure chamber can be reduced.

另外，根据本发明的涡旋式压缩机，还可以具有如下附加的技术特征：In addition, the scroll compressor according to the present invention may also have the following additional technical features:

在一些实施例中，所述背压腔沿所述静涡盘的周向方向延伸为环形，所述背压机构与所述静涡盘之间设有第一密封圈和第二密封圈，所述第一密封圈和所述第二密封圈分别位于所述背压腔的径向内侧和径向外侧。In some embodiments, the back pressure chamber extends in a ring shape along the circumferential direction of the static scroll, and a first sealing ring and a second sealing ring are provided between the back pressure mechanism and the static scroll, and the first sealing ring and the second sealing ring are respectively located on the radial inner side and the radial outer side of the back pressure chamber.

在一些实施例中，所述背压机构的朝向所述静涡盘的一侧设有环形的凹槽，所述凹槽的内壁与所述静涡盘的背离所述动涡盘的表面共同形成所述背压腔；或所述静涡盘的朝向所述背压机构的一侧设有环形的凹槽，所述凹槽的内壁与所述背压机构的朝向所述静涡盘的表面共同形成所述背压腔；或所述背压机构的朝向所述静涡盘的一侧设有环形的第一凹槽，所述静涡盘的朝向所述背压机构的一侧设有环形的第二凹槽，所述第一凹槽和所述第二凹槽的开口相对且连通，所述第一凹槽的内壁和所述第二凹槽的内壁共同形成所述背压腔。In some embodiments, an annular groove is provided on the side of the back-pressure mechanism facing the static scroll, and the inner wall of the groove and the surface of the static scroll facing away from the movable scroll together form the back-pressure chamber; or an annular groove is provided on the side of the static scroll facing the back-pressure mechanism, and the inner wall of the groove and the surface of the back-pressure mechanism facing the static scroll together form the back-pressure chamber; or an annular first groove is provided on the side of the back-pressure mechanism facing the static scroll, and an annular second groove is provided on the side of the static scroll facing the back-pressure mechanism, the openings of the first groove and the second groove are opposite and connected, and the inner wall of the first groove and the inner wall of the second groove together form the back-pressure chamber.

在一些实施例中，所述静涡盘的背离所述动涡盘的一侧具有环绕所述静涡盘排气孔的凸台，所述凸台的内壁与所述回油隔板的朝向所述静涡盘的表面共同限定出静涡盘排气腔，所述静涡盘排气腔与所述静涡盘排气孔和所述隔板排气孔连通。In some embodiments, the side of the static scroll facing away from the movable scroll has a boss surrounding the static scroll exhaust hole, and the inner wall of the boss and the surface of the oil return baffle facing the static scroll together define a static scroll exhaust chamber, and the static scroll exhaust chamber is connected to the static scroll exhaust hole and the baffle exhaust hole.

在一些实施例中，所述凸台的背离所述动涡盘的表面和所述回油隔板的朝向所述静涡盘的表面之间具有第三密封圈。In some embodiments, a third sealing ring is provided between a surface of the boss facing away from the movable scroll and a surface of the oil return baffle facing the fixed scroll.

在一些实施例中，所述第一通孔的内周壁与所述背压管的外周壁之间设有第四密封圈。In some embodiments, a fourth sealing ring is provided between the inner peripheral wall of the first through hole and the outer peripheral wall of the back pressure tube.

在一些实施例中，所述第一通孔沿所述第一通孔的轴向方向包括第一孔段和第二孔段，所述第一孔段的孔径小于所述第二孔段的孔径，所述第四密封圈设于所述背压管的外周壁和所述第二孔段的内周壁之间，所述第四密封圈与所述背压管过盈配合。In some embodiments, the first through hole includes a first hole segment and a second hole segment along the axial direction of the first through hole, the aperture of the first hole segment is smaller than the aperture of the second hole segment, the fourth sealing ring is arranged between the outer circumferential wall of the back pressure tube and the inner circumferential wall of the second hole segment, and the fourth sealing ring is interference fit with the back pressure tube.

在一些实施例中，所述第二孔段内还设有固定环，所述固定环位于所述第四密封圈的远离所述第一孔段的一侧，所述固定环与所述第二孔段过盈配合；或，所述第二孔段内还设有卡簧，所述卡簧位于所述第四密封圈的远离所述第一孔段的一侧，所述卡簧与所述第二孔段过盈配合。In some embodiments, a fixing ring is further provided in the second hole segment, the fixing ring is located on the side of the fourth sealing ring away from the first hole segment, and the fixing ring has an interference fit with the second hole segment; or, a retaining spring is further provided in the second hole segment, the retaining spring is located on the side of the fourth sealing ring away from the first hole segment, and the retaining spring has an interference fit with the second hole segment.

在一些实施例中，所述静涡盘上具有第一泄压通道和第二泄压通道，所述第一泄压通道的一端与所述背压腔连通，所述第二泄压通道的一端与所述压缩腔连通，另一端与所述第一泄压通道的侧壁连通，所述涡旋式压缩机还包括：泄压机构，所述泄压机构设于所述第一泄压通道内，所述泄压机构被构造成在所述背压腔内压力大于等于预设值时连通所述第一泄压通道和所述第二泄压通道，在所述背压腔内压力低于所述预设值时，切断所述第一泄压通道和所述第二泄压通道的连通。In some embodiments, the static scroll has a first pressure relief channel and a second pressure relief channel, one end of the first pressure relief channel is connected to the back pressure chamber, one end of the second pressure relief channel is connected to the compression chamber, and the other end is connected to the side wall of the first pressure relief channel, and the scroll compressor also includes: a pressure relief mechanism, the pressure relief mechanism is arranged in the first pressure relief channel, the pressure relief mechanism is configured to connect the first pressure relief channel and the second pressure relief channel when the pressure in the back pressure chamber is greater than or equal to a preset value, and cut off the connection between the first pressure relief channel and the second pressure relief channel when the pressure in the back pressure chamber is lower than the preset value.

在一些实施例中，所述泄压机构包括：第一堵头，所述第一堵头固定设于所述第一泄压通道内且位于所述第二泄压通道与所述第一泄压通道连通位置的远离所述背压腔的一侧；弹性件，所述弹性件位于所述第一堵头的朝向所述背压腔的一侧，所述弹性件的一端与所述第一堵头连接；第二堵头，所述第二堵头位于所述弹性件的朝向所述背压腔的一侧且与所述弹性件的另一端连接，所述第二堵头在所述弹性件的带动下在所述背压腔内压力大于等于预设值时连通所述第一泄压通道和所述第二泄压通道，在所述背压腔内压力低于所述预设值时，切断所述第一泄压通道和所述第二泄压通道的连通。In some embodiments, the pressure relief mechanism includes: a first plug, which is fixed in the first pressure relief channel and located on a side of the position where the second pressure relief channel and the first pressure relief channel are connected, away from the back pressure chamber; an elastic member, which is located on a side of the first plug facing the back pressure chamber, and one end of the elastic member is connected to the first plug; a second plug, which is located on a side of the elastic member facing the back pressure chamber and is connected to the other end of the elastic member, and the second plug, driven by the elastic member, connects the first pressure relief channel and the second pressure relief channel when the pressure in the back pressure chamber is greater than or equal to a preset value, and cuts off the connection between the first pressure relief channel and the second pressure relief channel when the pressure in the back pressure chamber is lower than the preset value.

在一些实施例中，所述第一泄压通道远离所述背压腔的一端位于所述静涡盘的外壁面上，所述第一堵头与所述第一泄压通道过盈配合以封堵所述第一泄压通道的背离所述背压腔的一端。In some embodiments, one end of the first pressure relief channel away from the back pressure chamber is located on the outer wall surface of the fixed scroll, and the first plug is interference fit with the first pressure relief channel to seal the end of the first pressure relief channel away from the back pressure chamber.

在一些实施例中，所述第一泄压通道包括第一子泄压通道和第二子泄压通道，所述第一子泄压通道的一端与所述背压腔连通，所述第二子泄压通道的一端与所述第一子泄压通道的背离所述背压腔的一端连通，所述第一子泄压通道和所述第二子泄压通道互成角度，所述第二泄压通道的一端与所述第二子泄压通道连通，所述泄压机构设于所述第二子泄压通道内。In some embodiments, the first pressure relief channel includes a first sub-pressure relief channel and a second sub-pressure relief channel, one end of the first sub-pressure relief channel is connected to the back pressure chamber, one end of the second sub-pressure relief channel is connected to an end of the first sub-pressure relief channel facing away from the back pressure chamber, the first sub-pressure relief channel and the second sub-pressure relief channel are at an angle to each other, one end of the second pressure relief channel is connected to the second sub-pressure relief channel, and the pressure relief mechanism is disposed in the second sub-pressure relief channel.

在一些实施例中，所述第二通孔与所述背压管之间具有第五密封圈；和/或，所述回油隔板与所述壳体之间设有第六密封圈；和/或，所述回油隔板与所述端盖之间设有第七密封圈。In some embodiments, a fifth sealing ring is provided between the second through hole and the back pressure pipe; and/or a sixth sealing ring is provided between the return oil baffle and the shell; and/or a seventh sealing ring is provided between the return oil baffle and the end cover.

在一些实施例中，所述回油隔板与所述壳体通过紧固件连接；和/或，所述回油隔板与所述端盖通过紧固件连接；和/或，所述背压机构和所述静涡盘通过紧固件连接。In some embodiments, the oil return baffle is connected to the shell by fasteners; and/or, the oil return baffle is connected to the end cover by fasteners; and/or, the back pressure mechanism and the static scroll are connected by fasteners.

在一些实施例中，所述端盖的朝向所述回油隔板的一侧设有沿所述端盖的周向方向延伸的环形凸筋，所述环形凸筋与所述回油隔板连接，所述环形凸筋的内周壁，所述端盖的朝向所述回油隔板的表面和所述回油隔板的朝向所述端盖的表面共同限定出端盖排气腔，所述端盖排气腔与所述隔板排气孔和所述端盖排气孔连通。In some embodiments, an annular rib extending along the circumferential direction of the end cover is provided on the side of the end cover facing the oil return baffle, and the annular rib is connected to the oil return baffle, and the inner circumferential wall of the annular rib, the surface of the end cover facing the oil return baffle, and the surface of the oil return baffle facing the end cover jointly define an end cover exhaust cavity, and the end cover exhaust cavity is connected to the baffle exhaust hole and the end cover exhaust hole.

本发明的附加方面和优点将在下面的描述中部分给出，部分将从下面的描述中变得明显，或通过本发明的实践了解到。Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention.

附图说明BRIEF DESCRIPTION OF THE DRAWINGS

本发明的上述和/或附加的方面和优点从结合下面附图对实施例的描述中将变得明显和容易理解，其中：The above and/or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

图1是根据本发明实施例的涡旋式压缩机的剖面示意图，其中示出气体流向；FIG1 is a schematic cross-sectional view of a scroll compressor according to an embodiment of the present invention, showing a gas flow direction;

图2是图1中A处的放大图；Fig. 2 is an enlarged view of point A in Fig. 1;

图3是根据本发明实施例的涡旋式压缩机的背压机构的固定环的立体图；3 is a perspective view of a fixing ring of a back pressure mechanism of a scroll compressor according to an embodiment of the present invention;

图4是根据本发明实施例的涡旋式压缩机的端盖的立体图；4 is a perspective view of an end cover of a scroll compressor according to an embodiment of the present invention;

图5是根据本发明实施例的涡旋式压缩机的端盖的主视图；5 is a front view of an end cover of a scroll compressor according to an embodiment of the present invention;

图6是根据本发明实施例的涡旋式压缩机的背压结构的立体图；6 is a perspective view of a back pressure structure of a scroll compressor according to an embodiment of the present invention;

图7是根据本发明实施例的涡旋式压缩机的背压结构的主视图；7 is a front view of a back pressure structure of a scroll compressor according to an embodiment of the present invention;

图8是根据本发明实施例的涡旋式压缩机的回油隔板的立体图；8 is a perspective view of an oil return baffle of a scroll compressor according to an embodiment of the present invention;

图9是根据本发明实施例的涡旋式压缩机的回油隔板的另一角度的立体图；9 is a perspective view of the oil return baffle of the scroll compressor according to an embodiment of the present invention from another angle;

图10是根据本发明实施例的涡旋式压缩机的回油隔板的主视图；10 is a front view of an oil return baffle of a scroll compressor according to an embodiment of the present invention;

图11是沿图10中B-B线的剖视图；Fig. 11 is a cross-sectional view along line B-B in Fig. 10;

图12是根据本发明实施例的涡旋式压缩机的静涡盘的主视图；12 is a front view of a fixed scroll of a scroll compressor according to an embodiment of the present invention;

图13是沿图12中C-C线的剖视图；Fig. 13 is a cross-sectional view along line C-C in Fig. 12;

图14是根据本发明实施例的涡旋式压缩机的泄压机构的主视图；14 is a front view of a pressure relief mechanism of a scroll compressor according to an embodiment of the present invention;

图15是根据本发明实施例的涡旋式压缩机的另一实施例的静涡盘与背压机构配合的剖视图；15 is a cross-sectional view of the cooperation between the fixed scroll and the back pressure mechanism of another embodiment of the scroll compressor according to the embodiment of the present invention;

图16是根据本发明实施例的涡旋式压缩机的另一实施例的静涡盘的主视图；16 is a front view of a stationary scroll of another embodiment of a scroll compressor according to an embodiment of the present invention;

图17是根据本发明实施例的涡旋式压缩机的另一实施例的背压机构的立体图。FIG. 17 is a perspective view of a back pressure mechanism of another embodiment of a scroll compressor according to an embodiment of the present invention.

附图标记：Reference numerals:

100、涡旋式压缩机；100. Scroll compressor;

1、壳体；11、安装腔；12、第六密封槽；121、第六密封圈；1. housing; 11. mounting cavity; 12. sixth sealing groove; 121. sixth sealing ring;

2、回油隔板；21、第二通孔；211、第五密封槽；2111、第五密封圈；22、隔板排气孔；23、第七密封槽；231、第七密封圈；24、安装凸耳；25、安装柱；2. Oil return baffle; 21. Second through hole; 211. Fifth sealing groove; 2111. Fifth sealing ring; 22. Baffle exhaust hole; 23. Seventh sealing groove; 231. Seventh sealing ring; 24. Mounting lug; 25. Mounting column;

3、动涡盘；31、压缩腔；311、压缩小腔；32、动涡旋齿；3. Moving scroll; 31. Compression chamber; 311. Compression small chamber; 32. Moving scroll tooth;

4、静涡盘；41、静涡盘排气孔；42、凸台；421、静涡盘排气腔；422、第三密封槽；4221、第三密封圈；43、第一泄压通道；431、第一子泄压通道；432、第二子泄压通道；44、第二泄压通道；45、第三安装孔；46、静涡旋齿；4. static scroll; 41. static scroll exhaust hole; 42. boss; 421. static scroll exhaust chamber; 422. third sealing groove; 4221. third sealing ring; 43. first pressure relief channel; 431. first sub-pressure relief channel; 432. second sub-pressure relief channel; 44. second pressure relief channel; 45. third mounting hole; 46. static scroll tooth;

5、背压机构；51、凹槽；511、背压腔；52、第一通孔；521、第一孔段；522、第二孔段；5221、第四密封圈；5222、固定环；53、第一密封槽；531、第一密封圈；54、第二密封槽；541、第二密封圈；55、第二安装孔；5. back pressure mechanism; 51. groove; 511. back pressure chamber; 52. first through hole; 521. first hole section; 522. second hole section; 5221. fourth sealing ring; 5222. fixing ring; 53. first sealing groove; 531. first sealing ring; 54. second sealing groove; 541. second sealing ring; 55. second mounting hole;

6、端盖；61、排气通道；611、开口；62、端盖排气孔；63、背压管；64、环形凸筋；65、端盖排气腔；66、第一安装孔；6. end cover; 61. exhaust channel; 611. opening; 62. end cover exhaust hole; 63. back pressure pipe; 64. annular convex rib; 65. end cover exhaust cavity; 66. first mounting hole;

7、泄压机构；71、第一堵头；72、弹性件；73、第二堵头。7. Pressure relief mechanism; 71. First plug; 72. Elastic member; 73. Second plug.

具体实施方式Detailed ways

下面详细描述本发明的实施例，实施例的示例在附图中示出，其中自始至终相同或类似的标号表示相同或类似的元件或具有相同或类似功能的元件。下面通过参考附图描述的实施例是示例性的，仅用于解释本发明，而不能理解为对本发明的限制。Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

在本发明的描述中，需要理解的是，术语“中心”、“纵向”、“横向”、“长度”、“宽度”、“厚度”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”、“内”、“外”、“顺时针”、“逆时针”、“轴向”、“径向”、“周向”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本发明和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本发明的限制。In the description of the present invention, 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 invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

此外，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括一个或者更多个该特征。在本发明的描述中，“多个”的含义是两个或两个以上，除非另有明确具体的限定。In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

在本发明中，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”、“固定”等术语应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或成一体；可以是机械连接，也可以是电连接，还可以是通信；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通或两个元件的相互作用关系。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本发明中的具体含义。In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

下面参考附图描述根据本发明实施例的涡旋式压缩机100。A scroll compressor 100 according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

如图1所示，根据本发明实施例的涡旋式压缩机100包括壳体1、回油隔板2、动涡盘3、静涡盘4、背压机构5和端盖6。As shown in FIG. 1 , a scroll compressor 100 according to an embodiment of the present invention includes a casing 1 , an oil return baffle 2 , a movable scroll 3 , a fixed scroll 4 , a back pressure mechanism 5 and an end cover 6 .

具体地，参考附图1所示，壳体1内限定出安装腔11，动涡盘3和静涡盘4设于安装腔11内，动涡盘3和静涡盘4配合共同限定出压缩腔31，静涡盘4上具有与压缩腔31连通的静涡盘排气孔41。可以理解的是，参考附图1所示，动涡盘3上设有动涡旋齿32，静涡盘4上设有静涡旋齿46，动涡旋齿32与静涡旋齿46相互啮合形成多个压缩小腔311，多个压缩小腔311组成压缩腔31，流体从动涡盘3径向外侧的压缩小腔311逐渐向动涡盘3径向内侧流动并受压缩压力升高，最终从静涡盘排气孔41处排出。Specifically, as shown in FIG. 1 , a mounting chamber 11 is defined in the housing 1, and the movable scroll 3 and the fixed scroll 4 are disposed in the mounting chamber 11. The movable scroll 3 and the fixed scroll 4 cooperate to define a compression chamber 31, and the fixed scroll 4 has a fixed scroll exhaust hole 41 connected to the compression chamber 31. It can be understood that, as shown in FIG. 1 , a movable scroll 32 is provided on the movable scroll 3, and a fixed scroll 46 is provided on the fixed scroll 4. The movable scroll 32 and the fixed scroll 46 mesh with each other to form a plurality of compression chambers 311, and the plurality of compression chambers 311 form the compression chamber 31. The fluid gradually flows from the compression chamber 311 on the radial outer side of the movable scroll 3 to the radial inner side of the movable scroll 3 and is compressed and the pressure increases, and finally discharged from the fixed scroll exhaust hole 41.

进一步地，参考附图1所示，背压机构5设于静涡盘4的远离动涡盘3的一侧，背压机构5为环形，背压机构5和静涡盘4之间限定出背压腔511，背压机构5上还具有第一通孔52。Further, referring to FIG. 1 , the back pressure mechanism 5 is disposed on the side of the fixed scroll 4 away from the movable scroll 3 , the back pressure mechanism 5 is annular, a back pressure chamber 511 is defined between the back pressure mechanism 5 and the fixed scroll 4 , and the back pressure mechanism 5 also has a first through hole 52 .

更进一步地，参考附图1和附图8所示，壳体1靠近端盖6的一侧具有回油隔板2，端盖6与回油隔板2连接，回油隔板2上具有第二通孔21，静涡盘4相对动涡盘3邻近端盖6设置。Furthermore, referring to Figures 1 and 8 , the shell 1 has an oil return baffle 2 on one side close to the end cover 6 , the end cover 6 is connected to the oil return baffle 2 , a second through hole 21 is provided on the oil return baffle 2 , and the fixed scroll 4 is arranged adjacent to the end cover 6 relative to the movable scroll 3 .

再进一步地，参考附图1、附图4和附图5所示，端盖6上具有排气通道61，回油隔板2上具有与静涡盘排气孔41连通的隔板排气孔22，端盖6上具有连通隔板排气孔22和排气通道61的端盖排气孔62，端盖6的朝向回油隔板2的一侧具有背压管63，背压管63穿设于第二通孔21和第一通孔52内以使背压腔511和排气通道61连通，避免了现有技术中的动涡旋齿在运行过程中堵住第一通孔的风险，保证了背压供应的连续性，减小背压腔511中的气体压力的波动。Furthermore, referring to Figures 1, 4 and 5, the end cover 6 is provided with an exhaust channel 61, the return oil baffle 2 is provided with a baffle exhaust hole 22 connected to the static vortex exhaust hole 41, the end cover 6 is provided with an end cover exhaust hole 62 connecting the baffle exhaust hole 22 and the exhaust channel 61, and the side of the end cover 6 facing the return oil baffle 2 is provided with a back pressure pipe 63, the back pressure pipe 63 is penetrated into the second through hole 21 and the first through hole 52 to connect the back pressure chamber 511 and the exhaust channel 61, thereby avoiding the risk of the movable vortex tooth in the prior art blocking the first through hole during operation, ensuring the continuity of the back pressure supply, and reducing the fluctuation of the gas pressure in the back pressure chamber 511.

其中，参考附图1所示，排气通道61长度方向(参考附图1所示的b方向)的一端具有开口611，涡旋式压缩机100内的气体可以通过排气通道61的开口611直接流出涡旋式压缩机100。进一步地，参考附图1所示，背压管63设于端盖6上远离开口611的一侧。As shown in FIG. 1 , one end of the exhaust passage 61 in the length direction (refer to the direction b shown in FIG. 1 ) has an opening 611, and the gas in the scroll compressor 100 can directly flow out of the scroll compressor 100 through the opening 611 of the exhaust passage 61. Further, as shown in FIG. 1 , the back pressure pipe 63 is disposed on a side of the end cover 6 away from the opening 611.

其中，在涡旋式压缩机100的运行过程中，制冷剂气体在动涡盘3和静涡盘4限定的压缩腔31中完成压缩后从静涡盘排气孔41处排出，随后经过隔板排气孔22和端盖排气孔62进入排气通道61，进入排气通道61的气体分为两路，一路从开口611处直接流出涡旋式压缩机100，一路朝向远离开口611的方向流入背压管63，沿着背压管63通过第二通孔21和第一通孔52，节流降压后达到中间压力，最终流至背压腔511。需要说明的是，流入背压腔511的中间压力下的气体中夹杂着部分排气分离出来的润滑油。Among them, during the operation of the scroll compressor 100, the refrigerant gas is compressed in the compression chamber 31 defined by the movable scroll 3 and the fixed scroll 4, and then discharged from the fixed scroll exhaust hole 41, and then enters the exhaust channel 61 through the partition exhaust hole 22 and the end cover exhaust hole 62. The gas entering the exhaust channel 61 is divided into two paths, one of which flows directly out of the scroll compressor 100 from the opening 611, and the other flows into the back pressure pipe 63 in the direction away from the opening 611, passes through the second through hole 21 and the first through hole 52 along the back pressure pipe 63, reaches the intermediate pressure after throttling and reducing the pressure, and finally flows to the back pressure chamber 511. It should be noted that the gas under the intermediate pressure flowing into the back pressure chamber 511 is mixed with some lubricating oil separated from the exhaust gas.

可以理解的是，现有技术中，由于轴向气体力的存在会推动静涡盘朝向远离动涡盘的方向运动，加大了动涡旋齿和静涡旋齿的轴向间隙，增加了径向泄露。本发明实施例的涡旋式压缩机100通过背压腔511内的中间压力的气体可以平衡部分轴向气体力，推动静涡盘4朝向靠近动涡盘3的方向移动，使静涡盘4紧贴动涡盘3，可以减小动涡旋齿32与静涡旋齿46的轴向间隙，减少径向泄露，保障了涡旋式压缩机100的性能和可靠性。It is understandable that in the prior art, the existence of axial gas force will push the static scroll to move away from the orbiting scroll, increase the axial clearance between the orbiting scroll and the static scroll, and increase radial leakage. The scroll compressor 100 of the embodiment of the present invention can balance part of the axial gas force through the gas of the intermediate pressure in the back pressure chamber 511, push the static scroll 4 to move in the direction close to the orbiting scroll 3, make the static scroll 4 close to the orbiting scroll 3, reduce the axial clearance between the orbiting scroll 32 and the static scroll 46, reduce radial leakage, and ensure the performance and reliability of the scroll compressor 100.

根据本发明实施例的涡旋式压缩机100，通过背压腔511内的中间压力的气体可以平衡部分轴向气体力，推动静涡盘4朝向靠近动涡盘3的方向移动，使静涡盘4紧贴动涡盘3，可以减小动涡旋齿32与静涡旋齿46的轴向间隙，减少径向泄露，保障涡旋式压缩机100的性能和可靠性。并且，通过将背压腔511与排气通道61连通，避免了现有技术中的动涡旋齿在运行过程中堵住第一通孔的风险，可以保证背压供应的连续性，减小背压腔511中的气体压力的波动。According to the scroll compressor 100 of the embodiment of the present invention, the gas at the intermediate pressure in the back pressure chamber 511 can balance part of the axial gas force, push the fixed scroll 4 to move in the direction close to the movable scroll 3, make the fixed scroll 4 close to the movable scroll 3, reduce the axial clearance between the movable scroll 32 and the fixed scroll 46, reduce radial leakage, and ensure the performance and reliability of the scroll compressor 100. In addition, by connecting the back pressure chamber 511 with the exhaust passage 61, the risk of the movable scroll blocking the first through hole during operation in the prior art is avoided, the continuity of the back pressure supply can be guaranteed, and the fluctuation of the gas pressure in the back pressure chamber 511 can be reduced.

在本发明的一些实施例中，参考附图1、附图6和附图7所示，背压腔511沿静涡盘4的周向方向延伸为环形，背压机构5上具有第一密封槽53和第二密封槽54，第一密封槽53和第二密封槽54沿静涡盘4的周向方向延伸为环形，且第一密封槽53位于背压腔511的径向内侧，第二密封槽54位于背压腔511的径向外侧。In some embodiments of the present invention, referring to Figures 1, 6 and 7, the back pressure chamber 511 extends in a ring shape along the circumferential direction of the static scroll 4, and the back pressure mechanism 5 has a first sealing groove 53 and a second sealing groove 54. The first sealing groove 53 and the second sealing groove 54 extend in a ring shape along the circumferential direction of the static scroll 4, and the first sealing groove 53 is located on the radial inner side of the back pressure chamber 511, and the second sealing groove 54 is located on the radial outer side of the back pressure chamber 511.

当然，本发明不限于此，第一密封槽53和第二密封槽54中的至少一个也可以设于静涡盘4上，换言之，可以是第一密封槽53和第二密封槽54皆设于背压机构5上；也可以是第一密封槽53和第二密封槽54中的一个设于背压机构5上，另一个设于静涡盘4上；还可以是第一密封槽53和第二密封槽54皆设于静涡盘4上，此处不做限制。Of course, the present invention is not limited to this. At least one of the first sealing groove 53 and the second sealing groove 54 may also be provided on the static scroll 4. In other words, both the first sealing groove 53 and the second sealing groove 54 may be provided on the back pressure mechanism 5; or one of the first sealing groove 53 and the second sealing groove 54 may be provided on the back pressure mechanism 5, and the other may be provided on the static scroll 4; or both the first sealing groove 53 and the second sealing groove 54 may be provided on the static scroll 4, and there is no limitation here.

进一步地，参考附图2所示，背压机构5与静涡盘4之间设有第一密封圈531和第二密封圈541，第一密封圈531和第二密封圈541分别位于背压腔511的径向内侧和径向外侧，第一密封圈531设于第一密封槽53内，第二密封圈541设于第二密封槽54内，第一密封圈531和第二密封圈541的设置可以实现背压机构5与静涡盘4之间的静态密封，提高背压机构5与静涡盘4之间的密封性。可选的，第一密封圈531和第二密封圈541的材质为丁腈橡胶，具有良好的耐油性、耐热性和气密性，硬度高且粘接力强。Further, referring to FIG. 2 , a first sealing ring 531 and a second sealing ring 541 are provided between the back pressure mechanism 5 and the static scroll 4. The first sealing ring 531 and the second sealing ring 541 are respectively located at the radial inner side and the radial outer side of the back pressure chamber 511. The first sealing ring 531 is provided in the first sealing groove 53, and the second sealing ring 541 is provided in the second sealing groove 54. The provision of the first sealing ring 531 and the second sealing ring 541 can realize the static seal between the back pressure mechanism 5 and the static scroll 4, and improve the sealing performance between the back pressure mechanism 5 and the static scroll 4. Optionally, the material of the first sealing ring 531 and the second sealing ring 541 is nitrile rubber, which has good oil resistance, heat resistance and air tightness, high hardness and strong adhesion.

在本发明的一些实施例中，参考附图1和附图6所示，背压机构5的朝向静涡盘4的一侧设有环形的凹槽51，凹槽51的内壁与静涡盘4的背离动涡盘3的表面共同形成背压腔511，背压腔511用于存放处于中间压力的气体并产生一定压力推动静涡盘4朝向靠近动涡盘3的方向移动，实现动涡盘3与静涡盘4的径向密封。In some embodiments of the present invention, referring to Figures 1 and 6, an annular groove 51 is provided on the side of the back pressure mechanism 5 facing the static scroll 4, and the inner wall of the groove 51 and the surface of the static scroll 4 facing away from the movable scroll 3 together form a back pressure chamber 511. The back pressure chamber 511 is used to store gas at an intermediate pressure and generate a certain pressure to push the static scroll 4 to move toward the direction close to the movable scroll 3, thereby realizing radial sealing between the movable scroll 3 and the static scroll 4.

在本发明的其他实施例中，参考附图15、附图16和附图17所示，静涡盘4的朝向背压机构5的一侧设有环形的凹槽51，凹槽51的内壁与背压机构5的朝向静涡盘4的表面共同形成背压腔511，背压腔511用于存放处于中间压力的气体并产生一定压力推动静涡盘4朝向靠近动涡盘3的方向移动，实现动涡盘3与静涡盘4的径向密封。In other embodiments of the present invention, referring to Figures 15, 16 and 17, an annular groove 51 is provided on the side of the static scroll 4 facing the back pressure mechanism 5, and the inner wall of the groove 51 and the surface of the back pressure mechanism 5 facing the static scroll 4 together form a back pressure chamber 511, and the back pressure chamber 511 is used to store gas at an intermediate pressure and generate a certain pressure to push the static scroll 4 to move toward the direction close to the movable scroll 3, thereby realizing radial sealing between the movable scroll 3 and the static scroll 4.

在本发明的其他实施例中，背压机构5的朝向静涡盘4的一侧设有环形的第一凹槽，静涡盘4的朝向背压机构5的一侧设有环形的第二凹槽，第一凹槽和第二凹槽的开口相对且连通，第一凹槽的内壁和第二凹槽的内壁共同形成背压腔511，背压腔511用于存放处于中间压力的气体并产生一定压力推动静涡盘4朝向靠近动涡盘3的方向移动，实现动涡盘3与静涡盘4的径向密封。In other embodiments of the present invention, a first annular groove is provided on the side of the back pressure mechanism 5 facing the static scroll 4, and a second annular groove is provided on the side of the static scroll 4 facing the back pressure mechanism 5. The openings of the first groove and the second groove are relative and connected. The inner wall of the first groove and the inner wall of the second groove jointly form a back pressure chamber 511. The back pressure chamber 511 is used to store gas at an intermediate pressure and generate a certain pressure to push the static scroll 4 to move toward the direction close to the movable scroll 3, thereby realizing radial sealing between the movable scroll 3 and the static scroll 4.

在本发明的一些实施例中，参考附图1和附图13所示，静涡盘4的背离动涡盘3的一侧具有环绕静涡盘排气孔41的凸台42，凸台42的内壁与回油隔板2的朝向静涡盘4的表面共同限定出静涡盘排气腔421，静涡盘排气腔421与静涡盘排气孔41和隔板排气孔22连通。可以理解的是，在涡旋式压缩机100的运行过程中，制冷剂气体在动涡盘3和静涡盘4限定的压缩腔31中完成压缩，然后从静涡盘排气孔41处排至静涡盘排气腔421，通过隔板排气孔22流向排气通道61。In some embodiments of the present invention, referring to FIGS. 1 and 13 , the side of the fixed scroll 4 facing away from the orbiting scroll 3 has a boss 42 surrounding the fixed scroll exhaust hole 41, and the inner wall of the boss 42 and the surface of the oil return baffle 2 facing the fixed scroll 4 jointly define a fixed scroll exhaust chamber 421, and the fixed scroll exhaust chamber 421 is connected to the fixed scroll exhaust hole 41 and the baffle exhaust hole 22. It can be understood that during the operation of the scroll compressor 100, the refrigerant gas is compressed in the compression chamber 31 defined by the orbiting scroll 3 and the stationary scroll 4, and then discharged from the stationary scroll exhaust hole 41 to the stationary scroll exhaust chamber 421, and flows to the exhaust channel 61 through the baffle exhaust hole 22.

在本发明的进一步的实施例中，参考附图12所示，凸台42的背离动涡盘3的表面和回油隔板2的朝向静涡盘4的表面中的一个上设有第三密封槽422，第三密封槽422沿凸台42的周向方向延伸为环形。在一个具体示例中，参考附图1和附图13所示，第三密封槽422设于凸台42的背离动涡盘3的表面上。进一步地，参考附图2所示，凸台42的背离动涡盘3的表面和回油隔板2的朝向静涡盘4的表面之间具有第三密封圈4221，第三密封圈4221设于第三密封槽422内，可以实现静涡盘4与回油隔板2之间的静态密封，提高静涡盘4与回油隔板2之间的密封性。可选的，第三密封圈4221的材质为丁腈橡胶，具有良好的耐油性、耐热性和气密性，硬度高且粘接力强。In a further embodiment of the present invention, as shown in FIG. 12, a third sealing groove 422 is provided on one of the surface of the boss 42 away from the movable scroll 3 and the surface of the oil return baffle 2 facing the fixed scroll 4, and the third sealing groove 422 extends in a ring shape along the circumferential direction of the boss 42. In a specific example, as shown in FIG. 1 and FIG. 13, the third sealing groove 422 is provided on the surface of the boss 42 away from the movable scroll 3. Further, as shown in FIG. 2, a third sealing ring 4221 is provided between the surface of the boss 42 away from the movable scroll 3 and the surface of the oil return baffle 2 facing the fixed scroll 4, and the third sealing ring 4221 is provided in the third sealing groove 422, so that a static seal between the fixed scroll 4 and the oil return baffle 2 can be achieved, and the sealing between the fixed scroll 4 and the oil return baffle 2 can be improved. Optionally, the material of the third sealing ring 4221 is nitrile rubber, which has good oil resistance, heat resistance and air tightness, high hardness and strong adhesion.

在本发明的一些实施例中，参考附图2所示，第一通孔52的内周壁与背压管63的外周壁之间设有第四密封圈5221，用于实现第一通孔52与背压管63之间的动态密封，能够在背压机构5随着静涡盘4在动涡盘3和静涡盘4的排布方向(参考附图2所示的a方向)上运动时保障第一通孔52与背压管63之间的密封性。优选的，第四密封圈5221为PTFE材料，具有良好的耐磨特性，能够在第一通孔52与背压管63之间发生相对运动时保障第一通孔52与背压管63之间的密封性，且可以延长第四密封圈5221的使用寿命，降低涡旋式压缩机100的维修成本和维修频率。In some embodiments of the present invention, as shown in FIG. 2 , a fourth sealing ring 5221 is provided between the inner peripheral wall of the first through hole 52 and the outer peripheral wall of the back pressure tube 63, which is used to realize dynamic sealing between the first through hole 52 and the back pressure tube 63, and can ensure the sealing between the first through hole 52 and the back pressure tube 63 when the back pressure mechanism 5 moves along with the static scroll 4 in the arrangement direction of the movable scroll 3 and the static scroll 4 (refer to the direction a shown in FIG. 2 ). Preferably, the fourth sealing ring 5221 is made of PTFE material, which has good wear resistance, can ensure the sealing between the first through hole 52 and the back pressure tube 63 when relative movement occurs between the first through hole 52 and the back pressure tube 63, and can extend the service life of the fourth sealing ring 5221, thereby reducing the maintenance cost and maintenance frequency of the scroll compressor 100.

在本发明的进一步的实施例中，参考附图2所示，第一通孔52沿第一通孔52的轴向方向(参考附图2所示的a方向)包括第一孔段521和第二孔段522，第一孔段521的孔径小于第二孔段522的孔径，第四密封圈5221设于背压管63的外周壁和第二孔段522的内周壁之间，第四密封圈5221与背压管63过盈配合，可以提高第四密封圈5221固定的可靠性，提高第一通孔52与背压管63配合的稳定性和密封性。In a further embodiment of the present invention, as shown in FIG. 2 , the first through hole 52 includes a first hole segment 521 and a second hole segment 522 along the axial direction of the first through hole 52 (refer to direction a shown in FIG. 2 ), the aperture of the first hole segment 521 is smaller than the aperture of the second hole segment 522, and the fourth sealing ring 5221 is arranged between the outer peripheral wall of the back pressure tube 63 and the inner peripheral wall of the second hole segment 522. The fourth sealing ring 5221 is interference fit with the back pressure tube 63, which can improve the reliability of the fixation of the fourth sealing ring 5221 and improve the stability and sealing of the fit between the first through hole 52 and the back pressure tube 63.

在本发明的更进一步的实施例中，参考附图2和附图3所示，第二孔段522内还设有固定环5222，固定环5222位于第四密封圈5221的远离第一孔段521的一侧，固定环5222与第二孔段522过盈配合，固定环5222用于固定第四密封圈5221，提高第四密封圈5221的可靠性，进而提高第一通孔52与背压管63配合的稳定性和密封性。In a further embodiment of the present invention, with reference to Figures 2 and 3, a fixing ring 5222 is further provided in the second hole section 522. The fixing ring 5222 is located on the side of the fourth sealing ring 5221 away from the first hole section 521. The fixing ring 5222 is interference fit with the second hole section 522. The fixing ring 5222 is used to fix the fourth sealing ring 5221, thereby improving the reliability of the fourth sealing ring 5221, and further improving the stability and sealing of the cooperation between the first through hole 52 and the back pressure tube 63.

在本发明的其他实施例中，第二孔段522内还设有卡簧，卡簧位于第四密封圈5221的远离第一孔段521的一侧，卡簧与第二孔段522过盈配合，卡簧用于固定第四密封圈5221，提高第四密封圈5221的可靠性，进而提高第一通孔52与背压管63配合的稳定性和密封性。In other embodiments of the present invention, a retaining spring is further provided in the second hole section 522. The retaining spring is located on the side of the fourth sealing ring 5221 away from the first hole section 521. The retaining spring is interference fit with the second hole section 522. The retaining spring is used to fix the fourth sealing ring 5221, thereby improving the reliability of the fourth sealing ring 5221, and further improving the stability and sealing of the cooperation between the first through hole 52 and the back pressure tube 63.

在本发明的一些实施例中，参考附图2和附图13所示，静涡盘4上具有第一泄压通道43和第二泄压通道44，第一泄压通道43的一端与背压腔511连通，第二泄压通道44的一端与压缩腔31连通，另一端与第一泄压通道43的侧壁连通，可以理解的是，在涡旋式压缩机100的运行过程中，从背压管63流至背压腔511内的气体可以流向第一泄压通道43，增大了存放中间压力的气体的空间，推动静涡盘4朝向靠近动涡盘3的方向移动，使静涡盘4紧贴动涡盘3，进一步减小动涡旋齿32与静涡旋齿46的轴向间隙，减少径向泄露。In some embodiments of the present invention, referring to Figures 2 and 13, a first pressure relief channel 43 and a second pressure relief channel 44 are provided on the static scroll 4, one end of the first pressure relief channel 43 is connected to the back pressure chamber 511, one end of the second pressure relief channel 44 is connected to the compression chamber 31, and the other end is connected to the side wall of the first pressure relief channel 43. It can be understood that during the operation of the scroll compressor 100, the gas flowing from the back pressure pipe 63 into the back pressure chamber 511 can flow to the first pressure relief channel 43, thereby increasing the space for storing the intermediate pressure gas, pushing the static scroll 4 to move toward the direction close to the movable scroll 3, so that the static scroll 4 is close to the movable scroll 3, further reducing the axial clearance between the movable scroll tooth 32 and the static scroll tooth 46, and reducing radial leakage.

进一步地，参考附图2和附图14所示，涡旋式压缩机100还包括泄压机构7，泄压机构7设于第一泄压通道43内，泄压机构7被构造成在背压腔511内压力大于等于预设值时连通第一泄压通道43和第二泄压通道44，在背压腔511内压力低于预设值时，切断第一泄压通道43和第二泄压通道44的连通。可以理解的是，当背压腔511内压力大于等于预设值时，第一泄压通道43与第二泄压通道44连通，位于背压腔511内的气体可以通过第一泄压通道43和第二泄压通道44流向压缩腔31；当背压腔511内压力低于预设值时，切断第一泄压通道43与第二泄压通道44的连通，位于背压腔511和第一泄压通道43内的气体无法通过第二泄压通道44通向压缩腔31。Further, referring to FIG. 2 and FIG. 14 , the scroll compressor 100 further includes a pressure relief mechanism 7, which is disposed in the first pressure relief channel 43. The pressure relief mechanism 7 is configured to connect the first pressure relief channel 43 and the second pressure relief channel 44 when the pressure in the back pressure chamber 511 is greater than or equal to a preset value, and to cut off the connection between the first pressure relief channel 43 and the second pressure relief channel 44 when the pressure in the back pressure chamber 511 is lower than the preset value. It can be understood that when the pressure in the back pressure chamber 511 is greater than or equal to the preset value, the first pressure relief channel 43 is connected to the second pressure relief channel 44, and the gas in the back pressure chamber 511 can flow to the compression chamber 31 through the first pressure relief channel 43 and the second pressure relief channel 44; when the pressure in the back pressure chamber 511 is lower than the preset value, the connection between the first pressure relief channel 43 and the second pressure relief channel 44 is cut off, and the gas in the back pressure chamber 511 and the first pressure relief channel 43 cannot flow to the compression chamber 31 through the second pressure relief channel 44.

此外，由于在第一泄压通道43与第二泄压通道44连通时，位于背压腔511内的气体是流向压缩腔31的，而该部分气体中夹杂着部分排气分离出来的润滑油，故该部分润滑油也随着气体回流至压缩腔31内，可以在一定程度上减少涡旋式压缩机100内润滑油的流失。In addition, when the first pressure relief channel 43 is connected to the second pressure relief channel 44, the gas in the back pressure chamber 511 flows toward the compression chamber 31, and part of the lubricating oil separated from the exhaust gas is mixed in the gas, so the part of the lubricating oil also flows back to the compression chamber 31 along with the gas, which can reduce the loss of lubricating oil in the scroll compressor 100 to a certain extent.

在本发明的进一步的实施例中，参考附图14所示，泄压机构7包括第一堵头71、弹性件72和第二堵头73。具体地，参考附图2所示，第一堵头71固定设于第一泄压通道43内且位于第二泄压通道44与第一泄压通道43连通位置的远离背压腔511的一侧。进一步地，弹性件72位于第一堵头71的朝向背压腔511的一侧，弹性件72的一端与第一堵头71连接。In a further embodiment of the present invention, as shown in FIG. 14 , the pressure relief mechanism 7 includes a first plug 71, an elastic member 72, and a second plug 73. Specifically, as shown in FIG. 2 , the first plug 71 is fixedly disposed in the first pressure relief channel 43 and is located on a side away from the back pressure chamber 511 of the position where the second pressure relief channel 44 and the first pressure relief channel 43 are connected. Furthermore, the elastic member 72 is located on a side of the first plug 71 facing the back pressure chamber 511, and one end of the elastic member 72 is connected to the first plug 71.

更进一步地，参考附图2所示，第二堵头73位于弹性件72的朝向背压腔511的一侧且与弹性件72的另一端连接，第二堵头73在弹性件72的带动下在背压腔511内压力大于等于预设值时连通第一泄压通道43和第二泄压通道44，在背压腔511内压力低于预设值时，切断第一泄压通道43和第二泄压通道44的连通。Furthermore, referring to FIG2 , the second plug 73 is located on the side of the elastic member 72 facing the back pressure chamber 511 and is connected to the other end of the elastic member 72. Driven by the elastic member 72, the second plug 73 connects the first pressure relief channel 43 and the second pressure relief channel 44 when the pressure in the back pressure chamber 511 is greater than or equal to a preset value. When the pressure in the back pressure chamber 511 is lower than the preset value, the connection between the first pressure relief channel 43 and the second pressure relief channel 44 is cut off.

可以理解的是，在背压腔511内压力大于等于预设值时，第二堵头73位于第一泄压通道43和第二泄压通道44连通位置的背离背压腔511的一侧，在背压腔511内压力低于预设值时，第二堵头73位于第一泄压通道43和第二泄压通道44的连通位置或位于第一泄压通道43和第二泄压通道44连通位置的朝向背压腔511的一侧。It can be understood that when the pressure in the back pressure chamber 511 is greater than or equal to a preset value, the second plug 73 is located on the side of the connecting position of the first pressure relief channel 43 and the second pressure relief channel 44 away from the back pressure chamber 511, and when the pressure in the back pressure chamber 511 is lower than the preset value, the second plug 73 is located at the connecting position of the first pressure relief channel 43 and the second pressure relief channel 44 or at the side of the connecting position of the first pressure relief channel 43 and the second pressure relief channel 44 facing the back pressure chamber 511.

可以理解的是，当背压腔511内压力大于等于预设值时，第二堵头73受到的来自于背压腔511内气体的压力大于弹性件72对第二堵头73的弹力，第二堵头73朝向靠近第一堵头71的方向运动，当第二堵头73运动至第一泄压通道43与第二泄压通道44连通位置的远离背压腔511的一侧时，第一泄压通道43与第二泄压通道44连通，位于背压腔511内的气体可以通过第一泄压通道43和第二泄压通道44流向压缩腔31；当背压腔511内压力低于预设值时，第二堵头73受到的来自于背压腔511内的气体的压力小于弹性件72对第二堵头73的弹力，第二堵头73朝向远离第一堵头71的方向运动，当第二堵头73运动至第一泄压通道43与第二泄压通道44连通位置的靠近背压腔511的一侧时，第一泄压通道43与第二泄压通道44断开，位于背压腔511和第一泄压通道43内的气体无法通过第二泄压通道44通向压缩腔31。It can be understood that when the pressure in the back pressure chamber 511 is greater than or equal to a preset value, the pressure on the second plug 73 from the gas in the back pressure chamber 511 is greater than the elastic force of the elastic member 72 on the second plug 73, and the second plug 73 moves toward the direction close to the first plug 71. When the second plug 73 moves to the side of the connecting position of the first pressure relief channel 43 and the second pressure relief channel 44 away from the back pressure chamber 511, the first pressure relief channel 43 is connected to the second pressure relief channel 44, and the gas in the back pressure chamber 511 can flow to the compression chamber 511 through the first pressure relief channel 43 and the second pressure relief channel 44. cavity 31; when the pressure in the back-pressure cavity 511 is lower than a preset value, the pressure from the gas in the back-pressure cavity 511 received by the second plug 73 is smaller than the elastic force of the elastic member 72 on the second plug 73, and the second plug 73 moves in the direction away from the first plug 71. When the second plug 73 moves to the side of the back-pressure cavity 511 where the first pressure relief channel 43 and the second pressure relief channel 44 are connected, the first pressure relief channel 43 is disconnected from the second pressure relief channel 44, and the gas in the back-pressure cavity 511 and the first pressure relief channel 43 cannot pass through the second pressure relief channel 44 to reach the compression cavity 31.

在本发明的更进一步的实施例中，参考附图2所示，第一泄压通道43远离背压腔511的一端位于静涡盘4的外壁面上，第一堵头71与第一泄压通道43过盈配合以封堵第一泄压通道43的背离背压腔511的一端，可以提高第一堵头71固定的可靠性，提高第一堵头71与第一泄压通道43配合的稳定性和密封性，同时可以简化第一泄压通道43的加工方法。In a further embodiment of the present invention, referring to FIG. 2 , one end of the first pressure relief channel 43 away from the back pressure chamber 511 is located on the outer wall surface of the static scroll 4, and the first plug 71 is interference fit with the first pressure relief channel 43 to seal the end of the first pressure relief channel 43 away from the back pressure chamber 511, which can improve the reliability of the fixation of the first plug 71, improve the stability and sealing of the cooperation between the first plug 71 and the first pressure relief channel 43, and at the same time simplify the processing method of the first pressure relief channel 43.

在本发明的更进一步的实施例中，参考附图2和附图13所示，第一泄压通道43包括第一子泄压通道431和第二子泄压通道432，第一子泄压通道431的一端与背压腔511连通，第二子泄压通道432的一端与第一子泄压通道431的背离背压腔511的一端连通，第一子泄压通道431和第二子泄压通道432互成角度，第二泄压通道44的一端与第二子泄压通道432连通，泄压机构7设于第二子泄压通道432内，能够更好地控制第二堵头73沿静涡盘4的径向方向运动，控制第一泄压通道43与第二泄压通道44的连通与断开。In a further embodiment of the present invention, with reference to Figures 2 and 13, the first pressure relief channel 43 includes a first sub-pressure relief channel 431 and a second sub-pressure relief channel 432, one end of the first sub-pressure relief channel 431 is connected to the back pressure chamber 511, one end of the second sub-pressure relief channel 432 is connected to an end of the first sub-pressure relief channel 431 away from the back pressure chamber 511, the first sub-pressure relief channel 431 and the second sub-pressure relief channel 432 are at an angle to each other, one end of the second pressure relief channel 44 is connected to the second sub-pressure relief channel 432, and the pressure relief mechanism 7 is arranged in the second sub-pressure relief channel 432, which can better control the movement of the second plug 73 along the radial direction of the static scroll 4, and control the connection and disconnection of the first pressure relief channel 43 and the second pressure relief channel 44.

在一个具体示例中，参考附图2和附图13所示，第一子泄压通道431和第二子泄压通道432之间的夹角为90°，便于静涡盘4的生产与加工。In a specific example, referring to FIGS. 2 and 13 , the angle between the first sub-pressure relief channel 431 and the second sub-pressure relief channel 432 is 90°, which is convenient for the production and processing of the static scroll 4 .

在本发明的一些实施例中，参考附图11所示，第二通孔21的内周壁上设有第五密封槽211，第五密封槽211沿第二通孔21的周向方向延伸为环形。进一步地，参考附图2所示，第二通孔21与背压管63之间具有第五密封圈2111，第五密封圈2111设于第五密封槽211内，可以实现回油隔板2与背压管63之间的静态密封，提高回油隔板2与背压管63之间的密封性。可选的，第五密封圈2111的材质为丁腈橡胶，具有良好的耐油性、耐热性和气密性，硬度高且粘接力强。In some embodiments of the present invention, as shown in FIG11, a fifth sealing groove 211 is provided on the inner peripheral wall of the second through hole 21, and the fifth sealing groove 211 extends in a ring shape along the circumferential direction of the second through hole 21. Further, as shown in FIG2, a fifth sealing ring 2111 is provided between the second through hole 21 and the back pressure pipe 63, and the fifth sealing ring 2111 is provided in the fifth sealing groove 211, so as to realize the static sealing between the return oil baffle 2 and the back pressure pipe 63, and improve the sealing between the return oil baffle 2 and the back pressure pipe 63. Optionally, the material of the fifth sealing ring 2111 is nitrile rubber, which has good oil resistance, heat resistance and air tightness, high hardness and strong adhesion.

进一步地，回油隔板2和壳体1中的一个上设有第六密封槽12，第六密封槽12沿壳体1的周向方向延伸为环形。在一个具体示例中，参考附图1所示，第六密封槽12设于壳体1上。进一步地，参考附图1所示，回油隔板2与壳体1之间设有第六密封圈121，第六密封圈121设于第六密封槽12内，可以实现回油隔板2与壳体1之间的静态密封，提高回油隔板2与壳体1之间的密封性。可选的，第六密封圈121的材质为丁腈橡胶，具有良好的耐油性、耐热性和气密性，硬度高且粘接力强。Further, a sixth sealing groove 12 is provided on one of the oil return baffle 2 and the shell 1, and the sixth sealing groove 12 extends in a ring shape along the circumferential direction of the shell 1. In a specific example, as shown in FIG1, the sixth sealing groove 12 is provided on the shell 1. Further, as shown in FIG1, a sixth sealing ring 121 is provided between the oil return baffle 2 and the shell 1, and the sixth sealing ring 121 is provided in the sixth sealing groove 12, which can realize static sealing between the oil return baffle 2 and the shell 1, and improve the sealing between the oil return baffle 2 and the shell 1. Optionally, the material of the sixth sealing ring 121 is nitrile rubber, which has good oil resistance, heat resistance and air tightness, high hardness and strong adhesion.

进一步地，回油隔板2和端盖6中的一个上设有第七密封槽23，第七密封槽23沿回油隔板2的周向方向延伸为环形。在一个具体示例中，参考附图9和附图10所示，第七密封槽23设于回油隔板2上。进一步地，参考附图1所示，回油隔板2与端盖6之间设有第七密封圈231，第七密封圈231设于第七密封槽23内，可以实现回油隔板2与端盖6之间的静态密封，提高回油隔板2与端盖6之间的密封性。可选的，第七密封圈231的材质为丁腈橡胶，具有良好的耐油性、耐热性和气密性，硬度高且粘接力强。Furthermore, a seventh sealing groove 23 is provided on one of the oil return baffle 2 and the end cover 6, and the seventh sealing groove 23 extends in a ring shape along the circumferential direction of the oil return baffle 2. In a specific example, referring to Figures 9 and 10, the seventh sealing groove 23 is provided on the oil return baffle 2. Further, referring to Figure 1, a seventh sealing ring 231 is provided between the oil return baffle 2 and the end cover 6, and the seventh sealing ring 231 is provided in the seventh sealing groove 23, which can realize static sealing between the oil return baffle 2 and the end cover 6, and improve the sealing between the oil return baffle 2 and the end cover 6. Optionally, the material of the seventh sealing ring 231 is nitrile rubber, which has good oil resistance, heat resistance and air tightness, high hardness and strong adhesion.

在本发明的一些实施例中，回油隔板2与壳体1通过紧固件连接，参考附图8所示，回油隔板2上设有多个沿回油隔板2周向方向间隔开的安装凸耳24供紧固件穿过，可以从多处将回油隔板2与壳体1固定，提高回油隔板2与壳体1连接的可靠性。在一个具体示例中，如图8和附图10所示，回油隔板2上设有四个间隔开的安装凸耳24，可以从四处将回油隔板2与壳体1固定。In some embodiments of the present invention, the oil return baffle 2 is connected to the housing 1 by fasteners. Referring to FIG8 , the oil return baffle 2 is provided with a plurality of mounting lugs 24 spaced apart along the circumferential direction of the oil return baffle 2 for the fasteners to pass through, so that the oil return baffle 2 can be fixed to the housing 1 from multiple locations, thereby improving the reliability of the connection between the oil return baffle 2 and the housing 1. In a specific example, as shown in FIG8 and FIG10 , the oil return baffle 2 is provided with four spaced apart mounting lugs 24, so that the oil return baffle 2 can be fixed to the housing 1 from four locations.

进一步地，回油隔板2与端盖6通过紧固件连接，参考附图4和附图9所示，回油隔板2上设有多个沿回油隔板2周向方向间隔开的安装柱25，端盖6上设有多个沿端盖6周向方向间隔开的第一安装孔66，多个安装柱25与第一安装孔66一一对应，可以从多处将回油隔板2与端盖6固定，提高回油隔板2与端盖6连接的可靠性。在一个具体示例中，如图5和附图10所示，回油隔板2上设有三个间隔开的安装柱25，端盖6上设有三个间隔开的第一安装孔66，可以从三处将回油隔板2与端盖6固定。Furthermore, the oil return baffle 2 is connected to the end cover 6 by fasteners. Referring to FIGS. 4 and 9 , the oil return baffle 2 is provided with a plurality of mounting posts 25 spaced apart along the circumferential direction of the oil return baffle 2, and the end cover 6 is provided with a plurality of first mounting holes 66 spaced apart along the circumferential direction of the end cover 6. The plurality of mounting posts 25 correspond to the first mounting holes 66 one by one, and the oil return baffle 2 and the end cover 6 can be fixed from multiple locations, thereby improving the reliability of the connection between the oil return baffle 2 and the end cover 6. In a specific example, as shown in FIG. 5 and FIG. 10 , the oil return baffle 2 is provided with three spaced apart mounting posts 25, and the end cover 6 is provided with three spaced apart first mounting holes 66, and the oil return baffle 2 and the end cover 6 can be fixed from three locations.

更进一步地，背压机构5和静涡盘4通过紧固件连接，参考附图6和附图12所示，背压机构5上设有多个沿背压机构5周向方向间隔开的第二安装孔55，静涡盘4上设有多个沿静涡盘4周向方向间隔开的第三安装孔45，多个第二安装孔55与第三安装孔45一一对应，可以从多处将背压机构5与静涡盘4固定，提高背压机构5与静涡盘4连接的可靠性。在一个具体示例中，如图7和附图12所示，背压机构5上设有三个间隔开的第二安装孔55，静涡盘4上设有三个间隔开的第三安装孔45，可以从三处将背压机构5与静涡盘4固定。Furthermore, the back pressure mechanism 5 and the static scroll 4 are connected by fasteners. Referring to Figures 6 and 12, the back pressure mechanism 5 is provided with a plurality of second mounting holes 55 spaced apart in the circumferential direction of the back pressure mechanism 5, and the static scroll 4 is provided with a plurality of third mounting holes 45 spaced apart in the circumferential direction of the static scroll 4. The plurality of second mounting holes 55 correspond to the third mounting holes 45 one by one, and the back pressure mechanism 5 can be fixed to the static scroll 4 from multiple locations, thereby improving the reliability of the connection between the back pressure mechanism 5 and the static scroll 4. In a specific example, as shown in Figures 7 and 12, the back pressure mechanism 5 is provided with three spaced apart second mounting holes 55, and the static scroll 4 is provided with three spaced apart third mounting holes 45, and the back pressure mechanism 5 can be fixed to the static scroll 4 from three locations.

可选的，紧固件可以为螺钉，也可以为其他的紧固件，此处不做限制。Optionally, the fastener may be a screw or other fasteners, which is not limited here.

在本发明的一些实施例中，参考附图4和附图5所示，结合参考附图1，端盖6的朝向回油隔板2的一侧设有沿端盖6的周向方向延伸的环形凸筋64，环形凸筋64与回油隔板2连接，环形凸筋64的内周壁，端盖6的朝向回油隔板2的表面和回油隔板2的朝向端盖6的表面共同限定出端盖排气腔65，端盖排气腔65与隔板排气孔22和端盖排气孔62连通。可以理解的是，在涡旋式压缩机100的运行过程中，制冷剂气体在动涡盘3和静涡盘4限定的压缩腔31中完成压缩后从静涡盘排气孔41处排出，随后经过隔板排气孔22进入端盖排气腔65，然后通过端盖排气孔62流向排气通道61。In some embodiments of the present invention, referring to FIGS. 4 and 5, in combination with FIG. 1, a side of the end cover 6 facing the oil return baffle 2 is provided with an annular rib 64 extending along the circumferential direction of the end cover 6, the annular rib 64 is connected to the oil return baffle 2, the inner peripheral wall of the annular rib 64, the surface of the end cover 6 facing the oil return baffle 2 and the surface of the oil return baffle 2 facing the end cover 6 jointly define an end cover exhaust chamber 65, and the end cover exhaust chamber 65 is connected to the baffle exhaust hole 22 and the end cover exhaust hole 62. It can be understood that during the operation of the scroll compressor 100, the refrigerant gas is compressed in the compression chamber 31 defined by the movable scroll 3 and the fixed scroll 4, and then discharged from the fixed scroll exhaust hole 41, and then enters the end cover exhaust chamber 65 through the baffle exhaust hole 22, and then flows to the exhaust channel 61 through the end cover exhaust hole 62.

根据本发明实施例的涡旋式压缩机100的其他构成以及操作对于本领域普通技术人员而言都是已知的，这里不再详细描述。Other structures and operations of the scroll compressor 100 according to the embodiment of the present invention are known to those skilled in the art and will not be described in detail here.

在本说明书的描述中，参考术语“一个实施例”、“一些实施例”、“示例”、“具体示例”、或“一些示例”等的描述意指结合该实施例或示例描述的具体特征、结构、材料或者特点包含于本发明的至少一个实施例或示例中。在本说明书中，对上述术语的示意性表述不必须针对的是相同的实施例或示例。而且，描述的具体特征、结构、材料或者特点可以在任一个或多个实施例或示例中以合适的方式结合。此外，在不相互矛盾的情况下，本领域的技术人员可以将本说明书中描述的不同实施例或示例以及不同实施例或示例的特征进行结合和组合。In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. 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 invention. 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 may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

尽管已经示出和描述了本发明的实施例，本领域的普通技术人员可以理解：在不脱离本发明的原理和宗旨的情况下可以对这些实施例进行多种变化、修改、替换和变型，本发明的范围由权利要求及其等同物限定。Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.