scroll compressor

Abstract

The present disclosure provides a scroll compressor, which includes: a housing; a compression mechanism, the compression mechanism including an orbiting scroll and a fixed scroll, the orbiting scroll and the fixed scroll being engaged with each other in a meshing manner to form a series of compression chambers; a main bearing seat, the main bearing seat being used to support the compression mechanism; and a positioning assembly, the positioning assembly including a positioning pin, wherein the fixed scroll is formed with a first orifice, the main bearing seat is formed with a second orifice, and the housing or a fixed component fixedly connected to the housing is formed with a third orifice, the positioning pin being engaged in the first orifice, the second orifice and the third orifice to maintain the relative angular position of any two of the fixed scroll, the main bearing seat and the housing and allowing the fixed scroll to move axially relative to the main bearing seat. The scroll compressor according to the present disclosure can maintain the relative angular position between the fixed scroll, the main bearing seat and the housing, and can achieve a compact design while ensuring the reliability of the scroll compressor.

Description

Technical Field

[0001] The present invention relates to 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] A scroll compressor may generally include a movable scroll and a fixed scroll that mesh with each other. In order to keep the scroll components (especially the fixed scroll) in the proper position, various positioning mechanisms need to be provided. These positioning mechanisms usually need to be used in conjunction with additional bolt components, and the bolt components need to have a sufficient diameter to withstand the corresponding load, which will inevitably occupy the limited radial space in the compressor, making it difficult to provide a compact miniaturized compressor. In addition, an improved positioning mechanism is also needed to improve the relative angular positioning accuracy between the fixed scroll, the main bearing seat and the housing.

[0004] Therefore, there is a need to provide an improved scroll compressor. Summary of the Invention

[0005] One object of one or more embodiments of the present disclosure is to maintain the relative angular positioning of any two of the non-orbiting scroll, the main bearing housing, and the housing.

[0006] One object of one or more embodiments of the present disclosure is to provide a solution for achieving a compact design of a scroll compressor in a simple manner.

[0007] According to one aspect of the present disclosure, a scroll compressor is provided, comprising: a shell; a compression mechanism, the compression mechanism comprising a movable scroll and a fixed scroll, the movable scroll and the fixed scroll being engaged with each other in a meshing manner to form a series of compression chambers; a main bearing seat, the main bearing seat being used to support the compression mechanism; and a positioning assembly, the positioning assembly comprising a positioning pin, characterized in that the fixed scroll is formed with a first orifice, the main bearing seat is formed with a second orifice, and the shell or a fixed component fixedly connected to the shell is formed with a third orifice, the positioning pin being engaged in the first orifice, the second orifice and the third orifice to maintain the relative angular position of any two of the fixed scroll, the main bearing seat and the shell and allowing the fixed scroll to move axially relative to the main bearing seat.

[0008] According to one aspect of the present disclosure, the locating pin is clearance-fitted in the first orifice, and the locating pin is fixed or clearance-fitted in each of the second orifice and the third orifice; or the locating pin is fixedly fitted in the first orifice, and the locating pin is clearance-fitted in each of the second orifice and the third orifice.

[0009] According to one aspect of the present disclosure, the positioning assembly further includes an axial positioning member disposed on a side of the fixed scroll facing away from the movable scroll and spaced a predetermined distance apart from the fixed scroll in the axial direction.

[0010] According to one aspect of the present disclosure, the scroll compressor further includes a muffler cover for partitioning an inner space of the scroll compressor into a high-pressure area and a low-pressure area, the muffler cover serving as the axial positioning member.

[0011] According to one aspect of the present disclosure, the positioning assembly further includes a radial positioning member, which is formed by an inner circumferential wall of the housing, and the inner circumferential wall forms a radial clearance fit with the fixed scroll.

[0012] According to one aspect of the present disclosure, the scroll compressor further includes an Oldham ring engaged with the movable scroll and the main bearing seat to prevent the movable scroll from rotating and to allow the movable scroll to orbit relative to the fixed scroll.

[0013] According to one aspect of the present disclosure, the movable scroll is provided with a pair of keyways for engagement with a pair of positioning keys of the Oldham ring, and the pair of keyways are blind grooves formed at the end plate of the movable scroll.

[0014] According to one aspect of the present disclosure, the radially outer end portion of the movable scroll directly faces the inner circumferential wall of the housing, or only a positioning pin is provided between the radially outer end portion of the movable scroll and the inner circumferential wall.

[0015] According to one aspect of the present disclosure, the shell includes a radial protrusion protruding radially inward from the inner circumferential wall of the shell, and the third orifice is arranged at the radial protrusion; or the scroll compressor also includes a silencer cover for separating the internal space of the scroll compressor into a high-pressure area and a low-pressure area, the silencer cover serves as the fixing component and the third orifice is arranged at the silencer cover.

[0016] According to another aspect of the present disclosure, a scroll compressor is provided, comprising: a shell; a compression mechanism, the compression mechanism comprising a movable scroll and a fixed scroll, the movable scroll and the fixed scroll being engaged with each other in a meshing manner to form a series of compression chambers; a main bearing seat, the main bearing seat being used to support the compression mechanism; and a positioning assembly, the positioning assembly comprising a positioning pin, characterized in that the fixed scroll is formed with a first orifice, the main bearing seat is formed with a second orifice, and the shell or a fixed component fixedly connected to the shell is formed with a third orifice, the positioning pin is engaged in the first orifice, the second orifice and the third orifice, and the engagement of the positioning pin with the first orifice and the second orifice is configured to maintain the angular position of the fixed vortex relative to the main bearing seat, and the fixed vortex can move axially relative to the main bearing seat.

[0017] According to another aspect of the present disclosure, the locating pin is loosely fitted in the first orifice and fixedly fitted in the second orifice, and the locating pin is loosely or fixedly fitted in the third orifice; or the locating pin is fixedly fitted in the first orifice, and the locating pin is loosely fitted in each of the second orifice and the third orifice.

[0018] The scroll compressor according to the present disclosure can maintain the relative angular positioning between the fixed scroll, the main bearing seat and the housing, improve their positioning accuracy, and achieve a compact design while ensuring the reliability of the scroll compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The features and advantages of one or more embodiments of the present invention will become more readily understood through the following description with reference to the accompanying drawings. The drawings described herein are for illustrative purposes only and are not intended to limit the scope of the present invention in any way. The drawings are not drawn to scale, and some features may be exaggerated or minimized to show details of particular components. In the drawings:

[0020] Figure 1 is a cross-sectional view schematically showing a scroll compressor according to a comparative example;

[0021] Figure 2 is an exploded perspective view schematically showing a scroll compressor according to a comparative example;

[0022] Figure 3 is a cross-sectional view schematically showing a scroll compressor according to a first embodiment of the present disclosure;

[0023] Figure 4 Schematically shows the Figure 3 A perspective view of a movable scroll in a scroll compressor;

[0024] Figure 5Schematically shows the Figure 3 A perspective view of a main bearing seat in a scroll compressor;

[0025] Figure 6 Schematically shows the Figure 3 A perspective view of an Oldham's scroll compressor;

[0026] Figure 7 Schematically shows the Figure 3 A perspective view of a fixed scroll in a scroll compressor;

[0027] Figure 8 is a cross-sectional view schematically showing a scroll compressor according to a second embodiment of the present disclosure; and

[0028] Figure 9 FIG1 is a cross-sectional view schematically showing a scroll compressor according to a third embodiment of the present disclosure. DETAILED DESCRIPTION

[0029] The present disclosure will be described below with reference to the accompanying drawings. The description is merely illustrative and does not limit the present disclosure and its applications.

[0030] Figure 1 FIG. 2 shows a longitudinal sectional view of a compressor according to a comparative example. Figure 1 As shown, the scroll compressor 1 includes a housing 10. The housing 10 houses an orbiting scroll 20 and a fixed scroll 30. The orbiting scroll 20 and the fixed scroll 30 include an orbiting scroll blade and a fixed scroll blade, respectively, which are engaged with each other in a meshing manner and extend from an orbiting scroll end plate 22 and a fixed scroll end plate 32, respectively.

[0031] In order to properly position the scroll component, the scroll compressor 1 includes a guide ring 70, an Oldham ring 60, and a positioning pin 80 (see FIG. Figure 2 A guide ring 70 is disposed between the fixed scroll 30 and the housing 10 to radially center and limit the fixed scroll. Furthermore, the guide ring 70 includes a step 72 extending toward the flange of the fixed scroll 30. The step 72 can abut against the flange of the fixed scroll, thereby limiting the axial motion range of the fixed scroll 30.

[0032] The main bearing seat 50 is suitable for supporting the compression mechanism including the fixed scroll and the orbiting scroll, and includes an annular central body (or central thrust plate 52) and an arm portion 54 located radially outward of the central thrust plate 52 and extending axially upward (see FIG. Figure 2 ). The upper surface of the central thrust plate 52 provides a thrust surface suitable for supporting the movable scroll 20. Each of the arm portions 54 is provided with an aperture. Figure 2As shown, by extending the bolt 8 through the hole of the guide ring 70 and extending into the hole of the main bearing seat 50, the guide ring 70 is fixed relative to the main bearing seat 50 and then fixed relative to the housing. At the same time, the axial guidance and axial limitation of the fixed vortex 30 by the guide ring 70 allow the fixed vortex 30 to move axially within a certain range relative to the main bearing seat 50.

[0033] The cross ring 60 is configured to cooperate with the movable scroll 20 and the fixed scroll 30 to prevent the movable scroll 20 from rotating. Figure 2 As shown, the Oldham ring 60 has an annular body 62, on which two pairs of engagement keys are provided. The first pair of engagement keys 64a, 64b are used to engage with the corresponding key grooves 32a, 32b on the fixed scroll 30, and the second pair of engagement keys 66a ( Figure 2 Only a single engagement key 66a is shown in FIG. 1 ) for engaging with a corresponding keyway 22a ( Figure 2 Only a single keyway 22a is shown in the figure. During operation, the first pair of engagement keys 64a, 64b and the second pair of engagement keys respectively move within their corresponding keyways. Thus, because the fixed scroll 30 is a fixed component, the orbiting scroll 20 is allowed to orbit relative to the fixed scroll 30 while preventing the orbiting scroll 20 from rotating.

[0034] The locating pin 80 extends through the fixed scroll 30 and the main bearing seat 50 to prevent the fixed scroll 30 from rotating relative to the main bearing seat 50. Specifically, one end of the locating pin 80 can be fixed to the main bearing seat 50 and the other end can be fitted with the fixed scroll clearance to limit the movement of the fixed scroll in the circumferential direction.

[0035] In the compressor according to the comparative example, since the guide ring 70 is fixed to the main bearing seat 50 by bolts, in order to achieve a stable connection, the diameter of the bolts needs to be large enough to meet the corresponding strength requirements. Accordingly, the main bearing seat and the guide ring connected to the bolts need to meet certain wall thickness requirements to set threaded holes and provide sufficient connection strength. Therefore, these components need to occupy a certain radial space to bear the corresponding load and maintain strength. In addition, it is also necessary to provide sufficient movement space for the cross slip ring engaged with the movable scroll and the fixed scroll to ensure the performance of the compressor. This makes it difficult to provide a compact and miniaturized compressor design without affecting the reliability of the compressor. In addition, since the guide ring is provided, the guide ring not only occupies radial space, but also the radial limitation and radial centering of the fixed scroll need to be indirectly achieved with the help of the guide ring, which makes the radial limitation and radial centering complicated and also reduces their accuracy.

[0036] In addition, the compressor according to the comparative example includes a plurality of positioning components, however, these positioning components still cannot provide a satisfactory positioning effect. For example, in the compressor with the jet reheat function that has been widely used, the compressor includes a jet reheat pipe. The jet reheat pipe passes through the shell of the compressor and is connected to the fixed scroll, and thus the refrigerant in the jet reheat pipe flows into the medium-pressure chamber of the compressor via the air supply port on the fixed scroll. By spraying liquid or gaseous refrigerant into the medium-pressure chamber of the compressor, the amount of gas in the compressor is increased and the temperature in the compression chamber is reduced. At this time, a part of the jet reheat pipe can be arranged in the shell of the compressor, and the other part is arranged in the fixed scroll, which puts higher requirements on the relative positioning between the components of the compressor.

[0037] Hereinafter, a compressor according to exemplary embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.

[0038] First embodiment

[0039] Figure 3 : is a partial longitudinal sectional view of a scroll compressor according to a first exemplary embodiment of the present invention. The compressor 1a according to the first exemplary embodiment of the present disclosure may include a housing 10a. A compression mechanism including a movable scroll 20a and a fixed scroll 30a may be housed in the housing 10a. The fixed scroll 30a may include a fixed scroll end plate 32a and a movable scroll blade 34a formed on one side of the fixed scroll end plate 32a and an annular wall 36a and 38a formed on the other side of the movable scroll end plate 32a. In addition, the fixed scroll also includes a circumferential wall portion 340 located at the radially outermost side surrounding the fixed scroll blade 34a. As shown in FIG. Figure 3 As shown, the fixed vortex 30a also has a flange 342 extending radially outward from the outer peripheral surface of the peripheral wall portion 340. The flange 342 of the fixed vortex 30a is arranged in the housing 10a through a small clearance fit. Here, the small clearance fit is to specify that the outer diameter of the flange 342 of the vortex 30a is slightly smaller than the inner diameter of the housing 10a, so that the fixed vortex 30a can be freely installed in the housing 10a, and at the same time, after installation, the fixed vortex 30a can move axially to a certain extent relative to the housing 10a, but the radial movement of the fixed vortex relative to the housing is restricted. Thus, the fixed vortex can be radially limited by the inner wall of the housing. The flange 342 of the fixed vortex 30a may include a first orifice 346 extending from the lower surface or first surface of the flange 342 to the upper surface or second surface in the axial direction.

[0040] The silencer cover 90a can be fixedly connected to the housing 10a and arranged above the fixed scroll 20a. A predetermined axial spacing is retained between the upper end of the fixed scroll 30a (i.e., the end away from the movable scroll 20a) and the lower end of the silencer cover 90a, thereby allowing the fixed scroll 30a to move to a certain extent in the axial direction while axially limiting the fixed scroll 30a, that is, the silencer cover 90a can constitute a longitudinal positioning member (also referred to as an axial positioning member). Of course, the present disclosure is not limited to this, and for example, a top cover or other components can also be provided to cooperate with the fixed scroll in a similar manner to serve as a longitudinal positioning member.

[0041] Orbiting scroll 20a may include an orbiting scroll end plate 22a, orbiting scroll blades 24a formed on one side of orbiting scroll end plate 22a, and an annular hub 26a formed on the other side of orbiting scroll end plate 22a. Fixed scroll blades 34a and orbiting scroll blades 24a may engage with each other, forming a series of compression chambers between the fixed scroll blades and the orbiting scroll blades when the scroll compressor is in operation, with the volume gradually decreasing from the radially outer side to the radially inner side, thereby compressing the working fluid.

[0042] The main bearing seat 50a is suitable for supporting the movable scroll 20a and the fixed scroll 30a. The main bearing seat 50a may include a main body portion 52a and a cylindrical portion 54a extending axially downward from the main body portion 52a. The upper surface of the main body portion 52a is suitable for supporting the end plate 22a of the movable scroll 20a to form a thrust surface. The main body portion 52a may extend radially outward relative to the cylindrical portion 54a to form a step portion, and the step portion of the main bearing seat 50a is provided on the radial protrusion 110a of the housing 10a, so as to be able to firmly hold the main bearing seat 50a to the housing. The radial protrusion 110a of the housing 10a may be formed with a third orifice 116 at a position corresponding to the second orifice 526 of the main body portion 52a of the main bearing seat 50a. As Figure 5 As shown, the main body portion 52a of the main bearing housing 50a may include a second aperture 526 extending in an axial direction from an upper or first surface 522 of the main body portion 52a to a lower or second surface thereof.

[0043] In order to prevent the movable scroll 20a from rotating, a cross ring 60a is provided to cooperate with the movable scroll 20a and the main bearing seat 50a. Figure 6As shown, the Oldham ring 60a may include an annular body 62a and a first pair of protrusions 622a, 622b and a second pair of protrusions 624a, 624b extending radially outward from the annular body 62a. The two pairs of protrusions may be provided with a first pair of engagement keys 626a, 626b and a second pair of engagement keys 628a, 628b, respectively. The Oldham ring 60a may be disposed between the main bearing seat 50a and the orbiting scroll 20a. The first pair of keys 626a, 626b of the Oldham ring 60a is used to engage with corresponding keyways 562a, 562b on the main bearing seat 50a, and the second pair of engagement keys 628a, 628b is used to engage with corresponding keyways 262a, 262b on the orbiting scroll 20a, thereby allowing the orbiting scroll 20a to orbit relative to the fixed scroll 30a while preventing the orbiting scroll 20a from rotating.

[0044] Figure 4 and Figure 5 The keyways 262a, 262b and keyways 562a, 562b for the Oldham slip rings are clearly shown. Figure 4 As shown, keyways 262a, 262b can be formed on the end plate 22a of the movable scroll 20a. Preferably, the keyways 262a, 262b can be blind grooves formed on the end plate 22a. The blind grooves do not penetrate the end plate 22a and extend to the other side of the end plate where the movable scroll blades are formed. At this time, the cross ring itself and its movement and the movable scroll blades can be independent of each other in the axial direction without interfering with each other, thereby further increasing the radial space of the scroll profile, expanding the displacement of the compressor and making the structure of the compressor more compact when the compressor displacement is expanded. Figure 5 The main body 52a of the main bearing housing 50a is formed with a first pair of recesses 56a, 56b and a second pair of recesses 58a, 58b. The first pair of recesses 56a, 56b includes circumferential grooves 564a, 564b, respectively, and keyways 562a, 562b, respectively, disposed below the circumferential grooves 564a, 564b and extending radially below the circumferential grooves 564a, 564b. The depth of the second pair of recesses 58a, 58b is substantially the same as that of the circumferential grooves 564a, 564b. During operation, the first pair of protrusions 622a, 622b and the second pair of protrusions 624a, 624b of the Oldham ring 60a are respectively accommodated in the circumferential grooves 564a, 564b and the second pair of recesses 58a, 58b, and the first pair of keys 626a, 626b move within the keyways 562a, 562b.

[0045] like Figure 3As shown, the positioning pin 80 can extend in the axial direction through the first aperture 346 of the flange of the fixed scroll, the second aperture 526 of the main body 52a of the main bearing seat 50a, and the third aperture 116 of the radial protrusion 110a of the housing 10a. Specifically, the positioning pin 80 is fixedly fitted in the second aperture 526 of the main bearing seat 50a, and the positioning pin 80 is slidably fitted in the first aperture 346 of the fixed scroll 30a and the third aperture 116 of the housing 10a. Figure 3 In the exemplary embodiment, the locating pin 80 is fixed in the second aperture 526 of the main bearing seat 50a by an interference fit, and the locating pin 80 is clearance fit in the first aperture 346 and the third aperture 116. Of course, the locating pin can also be fixedly and / or slidably fitted in the first to third apertures by any other appropriate means. Preferably, the locating pin can be assembled into and removed from the first to third apertures in a simple manner by using interference fit and clearance fit. The clearance fit herein refers to the outer diameter of the mutually fitting locating pin being slightly smaller than the inner diameter of the first to third apertures, so that the locating pin can be freely inserted into the first to third apertures while the radial movement of the locating pin relative to the first to third apertures is restricted. Reference Figure 3 The first orifice 346 of the fixed scroll 30a, the third orifice 116 of the shell and the second orifice 526 of the bearing seat 50a can preferably be arranged radially outside the compression chamber (in other words, radially outside the radially outermost position that the movable scroll end plate can reach in its orbital motion) to avoid the locating pin 80 interfering with the movement of the scroll and to provide the scroll with as much activity space as possible.

[0046] like Figure 3 As shown, the locating pin 80 is simultaneously engaged in the first orifice 346 of the fixed vortex 30a and the third orifice 116 of the housing, thereby preventing the fixed vortex 30a from angularly deviating from the housing 10a and maintaining the angular positioning of the fixed vortex 30a relative to the housing 10a. In addition, the locating pin 80 is slidably engaged in the first orifice of the fixed vortex 30a, so that the fixed vortex 30a can perform a certain range of axial movement along the axial direction without being hindered by the locating pin, thereby providing a certain axial flexibility to the vortex assembly to increase the reliability and safety of the compressor. In addition, the locating pin 80 is simultaneously engaged in the second orifice of the main bearing seat 50a, so the locating pin 80 can prevent the fixed vortex 30a from rotating relative to the main bearing seat 50a. Thus, by making the locating pin 80 simultaneously engaged in the first orifice, the second orifice and the third orifice, the relative angular position of any two of the fixed vortex, the main bearing seat and the housing can be maintained at the same time and the axial floating of the fixed vortex relative to the main bearing seat can be achieved. Although in Figure 3In the embodiment, the first orifice 346 is exemplarily shown as a through hole extending from the lower surface of the flange 242 of the orbiting scroll 20a to the upper surface, but it can also be formed as a blind hole that does not extend to the upper surface. Preferably, it is formed as a through hole that penetrates the flange 242 to prevent the positioning pin from being obstructed by the first orifice 346 that does not penetrate when the fixed scroll undergoes axial movement.

[0047] Figure 3 The locating pin 80 is shown as being fixedly fitted in the second aperture 526 of the main bearing seat 50a, and the locating pin 80 is slidably fitted in the first aperture 346 of the fixed scroll 30a and the third aperture 116 of the housing 10a, but other alternative arrangements may be adopted. For example, in an alternative embodiment, the locating pin 80 is fixedly fitted in the third aperture 116 of the housing 10a, and the locating pin 80 is slidably fitted in the first aperture 346 of the fixed scroll 30a and the second aperture 526 of the main bearing seat 50a. In addition, another alternative embodiment may be conceived in which the fixed scroll 80 is slidably arranged in the third aperture 116 of the housing 10a, the second aperture 526 of the main bearing seat 50a, and the first aperture 346 of the fixed scroll 30a. In these alternative embodiments, by simultaneously engaging the locating pin 80 in the first, second, and third orifices, the relative angular positions of any two of the fixed scroll, the main bearing seat, and the housing can also be maintained, and axial floating of the fixed scroll relative to the main bearing seat can be achieved.

[0048] exist Figure 3In the first embodiment shown, the locating pin 80 is fixedly fitted in the first orifice 346 of the fixed vortex 30a. Thus, compared with the alternative embodiment in which the locating pin is loosely fitted in the first orifice 346, the fitting clearance between the locating pin 80 and the fixed vortex 30a can be eliminated, and the angular positioning error between the fixed vortex and the main bearing seat can be reduced, thereby improving the accuracy of the angular positioning of the fixed vortex relative to the main bearing seat. Moreover, since the cross slip ring 60a is fitted with the movable vortex 20a and the main bearing seat 50a at the same time, the improved angular positioning accuracy between the fixed vortex 30a and the main shaft seat 50a can further improve the angular positioning accuracy between the fixed vortex 30a and the movable vortex 20a, thereby effectively improving the overall performance of the compressor by utilizing the precise positioning between the fixed vortex and the movable vortex. On the other hand, in the first embodiment, the locating pin 80 is fixedly fitted in the second orifice 526 of the main bearing seat 50a. In this way, compared with the alternative embodiment in which the locating pin is loosely fitted in the second orifice 526, the fitting clearance between the locating pin 80 and the main bearing seat 50a can be eliminated, and the relative angular error between the main bearing seat and the housing can be reduced, thereby improving the accuracy of the angular positioning of the main bearing seat relative to the housing, and further enabling components such as the oil return hole or the air intake port fitted on the main bearing seat to be more accurately positioned relative to the housing. In addition, in the alternative embodiment in which the locating pin 80 is fixedly fitted in the third orifice 116 and loosely fitted in the first orifice 346 and the second orifice 526, since the locating pin is fixedly fitted in the third orifice of the housing, the fitting clearance between the locating pin 80 and the housing 10a can be eliminated, compared with the embodiment in which the locating pin is loosely fitted in the third orifice, further reducing the angular positioning error between the fixed scroll and the housing, thereby improving the accuracy of the angular positioning of the fixed scroll relative to the housing.

[0049] In the compressor according to the exemplary embodiment of the present application, as Figure 3 As shown, on the side where the locating pin 80 is not provided, the radially outer end of the end plate 22a of the movable scroll 20a directly faces the inner circumferential wall of the housing 10a, and on the side where the locating pin 80 is provided, only the locating pin is provided between the radially outer end of the movable scroll 20a and the housing 10a. Here, directly facing means that no other components or parts (such as a part of the fixed scroll and / or a part of the main bearing seat) are located in between. Compared with the compressor according to the comparative example, the main bearing seat of the compressor according to the exemplary embodiment of the present application does not include an arm 54 for connecting to the guide ring bolts and located radially outside the movable scroll end plate. Therefore, the compressor 10a according to the present disclosure can further increase the end plate area of ​​the movable scroll, thereby facilitating the vortex overturning and axial force management, and improving the performance and reliability of the compressor.

[0050] Compared with the compressor according to the comparative example, the compressor according to the exemplary embodiment of the present disclosure does not include any bolts for connection, thereby avoiding the radial space required for bolts and threaded holes, thereby facilitating the provision of a compact miniaturized compressor design and simplifying the assembly and installation process of the scroll. Furthermore, according to the exemplary embodiment of the present disclosure, components of the compressor itself can be used as radial positioning components and axial positioning components, without the need for additional guide rings, which further saves space and simplifies the installation process. In addition, in the compressor according to the exemplary embodiment of the present application, since the cross slip ring is engaged with the main bearing seat and the movable scroll, half of the self-rotation torque can be transmitted to the housing through the main bearing seat. In this way, the housing bears half of the self-rotation torque and the positioning pin only bears half of the self-rotation torque, thereby improving the reliability of the compressor.

[0051] Second embodiment

[0052] Figure 8 FIG2 is a partial longitudinal cross-sectional view of a scroll compressor according to a second exemplary embodiment of the present invention. Hereinafter, identical components are denoted by identical reference numerals, and similar components are denoted by "b" in the second exemplary embodiment in place of "a" in the first exemplary embodiment, while remaining components remain the same. The scroll compressor is substantially identical in structure and function to the scroll compressor of the first exemplary embodiment, and therefore will not be described in detail. Only the differences will be described below.

[0053] like Figure 8 As shown, the radial protrusion 110b of the housing 10b of the scroll compressor 1b according to the second exemplary embodiment of the present disclosure does not include a third orifice, and the silencer cover 90b is formed with a third orifice 92b at a position corresponding to the first orifice 346 (the silencer cover 90b corresponds to the component fixedly connected to the housing according to the present invention and also corresponds to the axial positioning member according to the present invention). Similar to the scroll compressor 1a according to the first exemplary embodiment of the present disclosure, the positioning pin 80 in the scroll compressor 1b can extend through the third orifice 92b of the silencer cover 90b, the first orifice 346 of the fixed scroll 30a, and the second orifice 526 of the main bearing seat 50a. Specifically, in Figure 8In the exemplary embodiment, the locating pin 80 is fixedly engaged within the second aperture 526 of the main bearing seat 50a and the third aperture 92b of the muffler cover 90b, and the locating pin 80 is slidably engaged within the first aperture 346 of the fixed scroll 30a. For example, the locating pin 80 is secured within the second aperture 526 of the main bearing seat 50a and the third aperture 92b of the muffler cover 90b via an interference fit, and the locating pin 80 is fitted within the first aperture 346 with a small clearance. Of course, the locating pin may also be fixedly and / or slidably engaged within the first through third apertures using any other suitable means.

[0054] like Figure 8 As shown, the locating pin 80 is simultaneously engaged with the first orifice 346 of the fixed scroll 30a and the third orifice 92b of the muffler cover 90b fixed to the housing 10b, thereby preventing the fixed scroll 30a from angularly deviating from the housing 10b and maintaining the angular position of the fixed scroll 30a relative to the housing 10b. Furthermore, the locating pin 80 is slidably engaged within the orifice of the fixed scroll 30a, allowing the fixed scroll 30a to move axially within a certain range along the axial direction without being hindered by the locating pin, thereby providing a certain axial flexibility to the scroll assembly to increase the reliability and safety of the compressor. In addition, the locating pin 80 is also simultaneously engaged with the orifice of the main bearing seat 50a, thereby preventing the fixed scroll 30a from rotating relative to the main bearing seat 50a. Thus, by simultaneously engaging the locating pin 80 in the first, second, and third orifices, the relative angular position of any two of the fixed scroll, the main bearing seat, and the housing can be maintained, and the axial floating of the fixed scroll relative to the main bearing seat can be achieved. Further, in Figure 8In the second embodiment shown, because the locating pin 80 is fixedly engaged within the second opening 526 of the main bearing seat 50a and the third opening 92b of the muffler cover 90b fixedly connected to the housing, the clearance between the locating pin 80 and the main bearing seat 50a and the housing 10a is simultaneously eliminated, thereby simultaneously reducing the angular positioning error between any two of the fixed scroll, the main bearing seat, and the housing. In this way, on the one hand, the angular positioning accuracy of the fixed scroll relative to the main bearing seat is improved. Moreover, because the cross ring 60a is engaged with both the orbiting scroll 20a and the main bearing seat 50a, the improved angular positioning accuracy between the fixed scroll 30a and the main bearing seat 50a can further improve the angular positioning accuracy of the fixed scroll 30a and the orbiting scroll 20a. Therefore, the precise positioning between the fixed scroll 30a and the orbiting scroll 20a can effectively improve the overall performance of the compressor. On the other hand, the improved angular positioning accuracy of the main bearing seat relative to the housing allows components such as the oil return hole or the air intake port, which are engaged with the main bearing seat, to be more accurately positioned relative to the housing. On the other hand, the angular positioning error between the fixed scroll and the housing can be further reduced, thereby improving the accuracy of the angular positioning of the fixed scroll relative to the housing.

[0055] It should be noted here that although the compressor of the above-mentioned exemplary embodiment includes an orifice fitted on the silencer cover, those skilled in the art should understand that the exemplary embodiment according to the present disclosure is not limited to this, and the orifice can be provided on any component fixedly connected to the casing of the compressor.

[0056] Third embodiment

[0057] Figure 9 FIG2 is a partial longitudinal cross-sectional view of a scroll compressor according to a third exemplary embodiment of the present invention. Hereinafter, identical components are denoted by identical reference numerals. For similar components, "c" in the third exemplary embodiment replaces "b" in the second exemplary embodiment, while all other components remain the same. The scroll compressor of this embodiment is substantially identical in structure and function to the scroll compressor of the second exemplary embodiment, and therefore, a detailed description thereof will not be given here. Only the differences will be described below.

[0058] like Figure 9 As shown, similar to the scroll compressor 1b according to the second exemplary embodiment of the present disclosure, the positioning pin 80 in the scroll compressor 1c can extend through the third aperture 92b of the muffler cover 90b, the first aperture 346 of the fixed scroll 30a, and the second aperture 526 of the main bearing seat 50a. Figure 9In the exemplary embodiment, the locating pin 80 is fixedly engaged within the first orifice 346 of the fixed scroll 30a and slidably engaged within the second orifice 526 of the main bearing seat 50a and the third orifice 92b of the muffler cover 90b. For example, the locating pin 80 is secured within the first orifice 346 of the fixed scroll 30a via an interference fit, and the locating pin 80 is engaged within the second orifice 526 of the main bearing seat 50a and the third orifice 92b of the muffler cover 90b via a small clearance fit. Of course, the locating pin may also be fixedly and / or slidably engaged within the orifices using any other suitable means.

[0059] like Figure 9 As shown, the locating pin 80 is simultaneously engaged with the first orifice 346 of the movable scroll 20a and the third orifice 92b of the muffler cover 90b fixed to the housing, thereby preventing the fixed scroll 30a from angularly deviating relative to the housing 10b and maintaining the angular positioning of the fixed scroll 30a relative to the housing 10b. Furthermore, since the locating pin 80 is slidably engaged with the second orifice 526 of the main bearing seat 50a and the third orifice 92b of the muffler cover 90b, the locating pin 80 can move axially along the axial direction within a certain range together with the fixed scroll, thereby providing a certain axial flexibility to the scroll assembly to increase the reliability and safety of the compressor. In addition, the locating pin 80 is also simultaneously engaged with the orifice of the main bearing seat 50a, so that the locating pin 80 can prevent the fixed scroll 30a from rotating relative to the main bearing seat 50a. Thus, by fitting the locating pin 80 in the first, second and third orifices simultaneously, the relative angular positions of any two of the fixed scroll, the main bearing seat and the housing can be maintained simultaneously and the axial floating of the fixed scroll relative to the main bearing seat can be achieved. Figure 9 In the third embodiment shown, the locating pin 80 is fixedly fitted in the first orifice 346 of the fixed scroll 30a. Thus, compared with the embodiment in which the locating pin is loosely fitted in the first orifice 346, the fitting clearance between the locating pin 80 and the fixed scroll 30a can be eliminated, and the angular positioning error between the fixed scroll and the main bearing seat can be reduced, thereby improving the accuracy of the angular positioning of the fixed scroll relative to the main bearing seat. At the same time, since the cross ring 60a is fitted with both the orbiting scroll 20a and the main bearing seat 50a, the improved angular positioning accuracy between the fixed scroll 30a and the main shaft seat 50a can further improve the angular positioning accuracy of the fixed scroll 30a and the orbiting scroll 20a, thereby effectively improving the overall performance of the compressor. On the other hand, the locating pin is fixedly fitted in the first orifice, eliminating the fitting clearance between the locating pin 80 and the fixed scroll 30a. Therefore, compared with the embodiment in which the locating pin is loosely fitted in the first orifice, the angular positioning error between the fixed scroll and the housing can also be reduced, thereby improving the accuracy of the angular positioning of the fixed scroll relative to the housing.

[0060] As described above, the locating pin 80 of the exemplary embodiment of the present disclosure can be fitted in a variety of ways within the orifices formed in the fixed scroll, the main bearing seat, and the housing or a component fixedly connected to the housing, as long as it can maintain the relative angular positioning between the fixed scroll, the main bearing seat, and the housing and allow the fixed scroll to move axially relative to the main bearing seat. Preferably, the precise positioning of the fixed vortex relative to the main bearing seat can be achieved by adjusting the matching mode of the locating pin in the first orifice and the second orifice. As in the above-mentioned first embodiment, second embodiment and third embodiment, the locating pin 80 is fixedly fitted in the second orifice 526 of the main bearing seat 50a or the first orifice 346 of the fixed vortex 30a. In this way, the matching clearance between the locating pin 80 and the fixed vortex 30a or the main bearing seat 50a can be eliminated, and the angular positioning error between the fixed vortex and the main bearing seat can be reduced, thereby improving the accuracy of the angular positioning of the fixed vortex relative to the main bearing seat. At the same time, since the cross slip ring is matched with the movable vortex and the main bearing seat at the same time, the improved angular positioning accuracy between the fixed vortex and the main shaft seat can further improve the angular positioning accuracy of the fixed vortex 30a and the movable vortex 20a, thereby utilizing the precise positioning between the fixed vortex and the movable vortex to effectively improve the overall performance of the compressor.

[0061] Although various embodiments of the present invention have been described in detail herein, it should be understood that the present invention is not limited to the specific embodiments described and illustrated herein, and that other modifications and variations may be implemented by those skilled in the art without departing from the spirit and scope of the present invention. All such modifications and variations are intended to fall within the scope of the present invention. Furthermore, all components described herein may be replaced by other technically equivalent components.

Claims

1. A scroll compressor comprising: Housing (10a, 10b); A compression mechanism comprising a movable scroll (20a) and a fixed scroll (30a), wherein the movable scroll and the fixed scroll are engaged with each other to form a series of compression chambers; A main bearing seat (50a), the main bearing seat being used to support the compression mechanism; as well as A positioning assembly comprising a positioning pin (80), characterized in that: The fixed vortex (30a) is formed with a first orifice (346), the main bearing seat (50a) is formed with a second orifice (526), ​​and the housing (10a, 10b) or a fixed component (90b) fixedly connected to the housing is formed with a third orifice (116, 92b), and the locating pin is engaged in the first orifice, the second orifice and the third orifice to maintain the relative angular position of any two of the fixed vortex (30a), the main bearing seat and the housing (10a, 10b) and allow the fixed vortex (30a) to move axially relative to the main bearing seat (50a).

2. The scroll compressor according to claim 1, wherein: The locating pin is a clearance fit within the first aperture, and the locating pin is a fixed or clearance fit within each of the second aperture and the third aperture; or The locating pin is a fixed fit within the first aperture, and the locating pin is a clearance fit within each of the second and third apertures.

3. The scroll compressor according to any one of claims 1 to 2, wherein: The positioning assembly further includes an axial positioning member (90a, 90b) which is arranged on a side of the fixed scroll (30a) away from the movable scroll (20a) and is axially spaced a predetermined distance from the fixed scroll (30a).

4. The scroll compressor according to claim 3, wherein: The scroll compressor further includes a muffler cover for partitioning an inner space of the scroll compressor into a high-pressure area and a low-pressure area, the muffler cover serving as the axial positioning member.

5. The scroll compressor according to any one of claims 1 to 2, wherein: The positioning assembly further comprises a radial positioning component, which is formed by the inner peripheral wall of the housing (10a, 10b), and the inner peripheral wall forms a radial clearance fit with the fixed scroll (30a).

6. The scroll compressor according to any one of claims 1 to 2, wherein: The scroll compressor further includes a cross ring (60a) engaged with the movable scroll (20a) and the main bearing seat (50a) to prevent the movable scroll from rotating and to allow the movable scroll (20a) to orbit relative to the fixed scroll (30a).

7. The scroll compressor according to claim 6, wherein: The movable scroll (20a) is provided with a pair of keyways (262a, 262b) for engaging a pair of positioning keys of the cross ring, and the pair of keyways (262a, 262b) are blind grooves formed on the end plate (22a) of the movable scroll (20a).

8. The scroll compressor according to any one of claims 1 to 2, wherein: The radial outer end of the movable scroll (20a) directly faces the inner peripheral wall of the housing (10a, 10b), or only the positioning pin is provided between the radial outer end of the movable scroll (20a) and the inner peripheral wall.

9. The scroll compressor according to any one of claims 1 to 2, wherein: The housing includes a radial protrusion (110a) protruding radially inward from an inner peripheral wall of the housing, and the third hole (116) is provided at the radial protrusion; or The scroll compressor further includes a muffler cover for dividing the inner space of the scroll compressor into a high-pressure area and a low-pressure area, the muffler cover serving as the fixing member and the third port (92b) being provided at the muffler cover.

10. A scroll compressor comprising: Housing (10a, 10b); A compression mechanism comprising a movable scroll (20a) and a fixed scroll (30a), wherein the movable scroll and the fixed scroll are engaged with each other to form a series of compression chambers; A main bearing seat (50a), the main bearing seat being used to support the compression mechanism; as well as A positioning assembly comprising a positioning pin (80), characterized in that: The fixed vortex (30a) is formed with a first orifice (346), the main bearing seat (50a) is formed with a second orifice (526), ​​and the housing (10a, 10b) or a fixed component (90b) fixedly connected to the housing is formed with a third orifice (116, 92b), the locating pin is engaged in the first orifice, the second orifice and the third orifice, and the engagement of the locating pin with the first orifice and the second orifice is configured to maintain the angular position of the fixed vortex (30a) relative to the main bearing seat (50a), and the fixed vortex (30a) can move axially relative to the main bearing seat (50a).

11. The scroll compressor according to claim 10, wherein: The locating pin has a clearance fit in the first aperture and a fixed fit in the second aperture, and the locating pin has a clearance or fixed fit in the third aperture; or The locating pin is a fixed fit within the first aperture, and the locating pin is a clearance fit within each of the second and third apertures.

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