Scroll compressor
By setting auxiliary grooves on the stationary and moving scrolls of the scroll compressor, the problem of pressure imbalance in the working chamber is solved, the stable operation of the moving scroll is achieved, wear and noise are reduced, and volumetric efficiency and reliability are improved.
Patent Information
- Application Number
- CN202520176288.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-27
- Publication Date
- 2025-12-05
- Estimated Expiration
- 2035-01-27
AI Technical Summary
In existing scroll compressors, pressure imbalance between paired working chambers causes radial movement of the moving scroll, increasing noise and wear, and providing a tangential clearance leakage path, thus reducing volumetric efficiency.
Auxiliary grooves are provided on the stationary and/or moving scroll plates to ensure smooth communication between the working chamber and the central outlet. The auxiliary grooves provide additional channels at specific locations to balance pressure and prevent radial swaying and tangential leakage.
It significantly reduces the radial wobble of the moving scroll, prevents the moving scroll from overturning, reduces wear and noise, and maintains high volumetric efficiency and service life.
Smart Images
Figure CN223634895U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present disclosure relates to the technical field of compressors, and more particularly, to a scroll compressor. BACKGROUND
[0002] Scroll compressors are widely used in the field of air conditioners due to their high volumetric efficiency, small vibration and low noise. The improvements of existing scroll compressors mainly focus on increasing suction volume and improving volumetric efficiency. The existing scroll compressors often use a combination of a moving scroll and a stationary scroll to compress the medium. A plurality of working chambers for containing and compressing the medium are defined between the scroll body of the stationary scroll and the scroll body of the moving scroll. These working chambers are symmetrically arranged about the center of the scroll body in pairs. However, since the exhaust port is often arranged in the stationary scroll, it will not move with the moving scroll, which will cause the pressure imbalance of a pair of working chambers close to the center of the scroll body. This will cause the radial runout of the moving scroll. This radial runout not only increases the noise and wear of the moving scroll during operation, but also causes the tangential gap between the moving scroll and the stationary scroll. This tangential gap provides a path for the medium to leak from the high-pressure working chamber to the low-pressure working chamber, thereby reducing the volumetric efficiency of the scroll compressor.
[0003] Therefore, in the art, there is an urgent need for a technical solution that can improve the pressure balance between the paired working chambers in the scroll compressor. CONTENT OF THE INVENTION
[0004] In order to solve the above-mentioned problems in the prior art, the present disclosure proposes an improved scroll compressor, which comprises a fixed stationary scroll comprising a stationary disc body provided with a central outlet and a stationary scroll body protruding from the surface of the stationary disc body; and a movable moving scroll comprising a moving disc body and a moving scroll body protruding from the surface of the moving disc body, wherein the stationary scroll body and the moving scroll body respectively extend along an involute and engage with each other to define a plurality of working chambers, the plurality of working chambers comprising a first working chamber close to the inner end of the moving scroll body and defined between the outer side wall of the moving scroll body and the inner side wall of the stationary scroll body, and a second working chamber close to the inner end of the stationary scroll body and defined between the outer side wall of the stationary scroll body and the inner side wall of the moving scroll body, and wherein the stationary scroll and / or the moving scroll is provided with an auxiliary groove configured to communicate the second working chamber with the central outlet when the first working chamber communicates with the central outlet.
[0005] According to an optional embodiment of the present disclosure, the inner end of the static scroll is configured to be in contact with the inner side wall of the dynamic scroll when the first working chamber is in communication with the central outlet, and the auxiliary groove is configured to extend across the inner end of the static scroll when the first working chamber is in communication with the central outlet.
[0006] According to an optional embodiment of the present disclosure, the auxiliary groove is formed in the static disc and recessed from a surface of the static disc, and the auxiliary groove opens to the central outlet at a proximal end and extends from the proximal end across an inner end of the static scroll to a distal end.
[0007] According to an optional embodiment of the present disclosure, the distal end of the auxiliary groove is located on both sides of the inner end of the static scroll from the central outlet.
[0008] According to an optional embodiment of the present disclosure, the auxiliary groove extends around the inner end of the static scroll between the proximal end and the distal end, such that the auxiliary groove has a curved shape toward the inner end of the static scroll.
[0009] According to an optional embodiment of the present disclosure, a side wall of the auxiliary groove is tangent to a side wall of the central outlet at the proximal end.
[0010] According to an optional embodiment of the present disclosure, the auxiliary groove narrows in a direction from the proximal end to the distal end.
[0011] According to an optional embodiment of the present disclosure, the dynamic scroll is adapted to be moved to a position such that an outer side wall of the dynamic scroll is tangent to a side wall of the central outlet and an inner side wall of the dynamic scroll is tangent to a side wall of the auxiliary groove.
[0012] According to an optional embodiment of the present disclosure, the auxiliary groove extends from a surface of the static disc to a partial thickness of the static disc.
[0013] According to an optional embodiment of the present disclosure, the auxiliary groove extends through the static disc.
[0014] According to an optional embodiment of the present disclosure, the auxiliary groove is formed in the dynamic scroll and recessed from a top of the dynamic scroll, and the auxiliary groove extends from a proximal end on an inner end of the dynamic scroll to a distal end on an inner side wall of the dynamic scroll.
[0015] According to an optional embodiment of the present disclosure, the dynamic scroll is adapted to be moved to a position such that an inner end of the static scroll is tangent to an inner side wall of the dynamic scroll at a distal end of the auxiliary groove and an outer side wall of the dynamic scroll is tangent to a side wall of the central outlet.
[0016] According to an alternative embodiment of the present disclosure, the auxiliary grooves extend from the top of the orbiting scroll to a portion of the height of the orbiting scroll.
[0017] According to an alternative embodiment of the present disclosure, the auxiliary grooves extend from the top of the orbiting scroll to the surface of the fixed scroll.
[0018] The present disclosure can be embodied as the illustrative embodiments in the drawings. However, it should be noted that the drawings are merely illustrative, and any variations contemplated under the teachings of the present disclosure should be considered to be within the scope of the present disclosure. BRIEF DESCRIPTION OF DRAWINGS
[0019] The drawings show exemplary embodiments of the present disclosure. These drawings should not be construed as necessarily limiting the scope of the present disclosure, wherein:
[0020] Figure 1 is a schematic cross-sectional view of a scroll compressor according to an embodiment of the present disclosure;
[0021] Figure 2 is Figure 1 is a schematic perspective view of a fixed scroll of the scroll compressor shown in
[0022] Figure 3 is Figure 1 is a schematic perspective view of an orbiting scroll of the scroll compressor shown in
[0023] Figure 4a , Figure 4b , Figure 4c and Figure 4d are schematic cross-sectional views of a fixed scroll with an orbiting scroll in different positions taken along line IV-IV in Figure 1 , wherein the outlines of the fixed scroll and the orbiting scroll are shown in dashed lines for the sake of clarity;
[0024] Figure 5 is a schematic perspective view of a fixed scroll of a scroll compressor according to another embodiment of the present disclosure; and
[0025] Figure 6 is a schematic perspective view of an orbiting scroll of a scroll compressor according to yet another embodiment of the present disclosure. DETAILED DESCRIPTION
[0026] Further features and advantages of the present disclosure will become apparent from the following description, with reference to the drawings. In the drawings, exemplary embodiments of the present disclosure are illustrated and to the extent that the various drawings are not necessarily drawn to scale. However, the present disclosure can take many different forms and should not be construed as limited to the embodiments set forth herein as exemplary. Rather, these exemplary embodiments are provided so that this disclosure will be thorough and will fully convey the scope of the present disclosure to those skilled in the art.
[0027] The present disclosure aims to provide a scroll compressor with a novel design. With the novel design of the scroll compressor, the pressure balance between each working chamber defined by the orbiting scroll and the fixed scroll can be significantly improved during operation, thereby the radial wobble of the orbiting scroll during revolution can be significantly reduced, and thus the overturning of the orbiting scroll and the tangential leakage between the orbiting scroll and the fixed scroll caused by the radial wobble of the orbiting scroll can be reduced, and the abrasion and noise of the orbiting scroll and the fixed scroll caused by the radial wobble of the orbiting scroll can be alleviated. Therefore, the scroll compressor according to the present disclosure can effectively avoid tangential leakage, thereby maintaining a high volumetric efficiency, and alleviating the abrasion of the orbiting scroll and the fixed scroll, thereby having a longer service life and higher reliability, in addition to being able to reduce the noise generated during operation, thereby maintaining a better use environment.
[0028] The various alternative but non-limiting embodiments of the scroll compressor according to the present disclosure will be described in detail below with reference to the various drawings. Before that, it is pointed out that in the terminology used in the present disclosure, the terms "axial direction", "radial direction", "circumferential direction", etc. have their usual meanings in the art. Specifically, the axial direction can be a direction parallel or coincident with the rotational axis of the main shaft of the scroll compressor, that is, the axial direction can be defined by the rotational axis of the main shaft; the radial direction can be any direction perpendicular to the axial direction; and the circumferential direction can be any direction around the axial direction.
[0029] Reference is made to Figure 1 wherein a schematic cross-sectional view of a scroll compressor according to an embodiment of the present disclosure is shown. As Figure 1As shown, the scroll compressor 10 generally includes a housing 100 and a stationary scroll 200, an orbiting scroll 300, a motor 400, and a drive assembly 500 contained within the housing 100. The stationary scroll 200 is fixedly disposed in the housing 100 and includes a stationary scroll body 210 and a stationary scroll wrap 220 projecting from the stationary scroll body 210 along an axial direction XX'. The stationary scroll wrap 220 extends from a center of the stationary scroll body 210 toward a periphery of the stationary scroll body 210 along an involute or in the form of an involute. The orbiting scroll 300 is movably disposed in the housing 100 and includes an orbiting scroll body 310 and an orbiting scroll wrap 320 projecting from the orbiting scroll body 310 along the axial direction XX'. The orbiting scroll wrap 320 extends from a center of the orbiting scroll body 310 toward a periphery of the orbiting scroll body 310 along an involute or in the form of an involute. The stationary scroll wrap 220 of the stationary scroll 200 and the orbiting scroll wrap 320 of the orbiting scroll 300 are arranged facing each other such that the stationary scroll wrap 220 is oriented to project from the stationary scroll body 210 toward the orbiting scroll body 310, and the orbiting scroll wrap 320 is oriented to project from the orbiting scroll body 310 toward the stationary scroll body 210. In addition, as described in further detail below, sidewalls of the stationary scroll wrap 220 can engage or be tangent to sidewalls of the orbiting scroll wrap 320 at a plurality of locations, thereby defining a plurality of working chambers therebetween distributed along the involute.
[0030] As Figure 1As shown, the motor 400 includes a stator 410 fixedly arranged in the housing 100, a rotor 420 rotatably arranged in the housing 100, and a main shaft 430 non-rotationally connected to the rotor 420 (e.g. by welding, bolting, keying, etc.) so as to support the rotor 420 in the housing 100, wherein the main shaft 430 can rotate with the rotor 420 about the axial direction XX’ when the rotor 420 rotates about the axial direction XX’ under the drive of the rotating magnetic field generated by the energized stator 410. The transmission assembly 500 includes an eccentric block 510 and an eccentric shaft 520 connecting the eccentric block 510 to the main shaft 430, wherein the eccentric block 510 is connected to the orbiting scroll 300, e.g. by a bearing 610, and the orbiting scroll 300 can be provided with a bearing seat 330 on the side of the orbiting scroll body 310 opposite to the orbiting scroll wrap 320, the bearing 610 can be received in the bearing seat 330, and the eccentric block 510 can be inserted into the bearing 610. In addition, the eccentric shaft 520 can be inserted into the main shaft 430 in a manner fixed relative to the main shaft 430 and eccentric, and inserted into the eccentric block 510 in a manner rotatable relative to the eccentric block 510 and eccentric, so that the eccentric block 510 is rotatably connected to the main shaft 430 at a position eccentric relative to the main shaft 430. In this configuration, the rotation of the main shaft 430 about the axial direction XX’ can be converted into the revolution (also referred to as the translation) of the eccentric block 510 about the axial direction XX’, and the revolution of the eccentric block 510 about the axial direction XX’ can be converted into the revolution of the orbiting scroll 300 about the axial direction XX’. Of course, in order to suppress the rotation tendency (also referred to as the self-rotation tendency) of the orbiting scroll 300, the scroll compressor 10 can further include an anti-rotation structure acting on the orbiting scroll 300, so as to ensure that the orbiting scroll 300 revolves or translates about the axial direction XX’ without self-rotation.
[0031] During the operation of the scroll compressor 10, the stator 410 of the motor 400 can generate a rotating magnetic field after being energized, thereby driving the rotor 420 and the main shaft 430 to rotate, and the main shaft 430 can in turn drive the orbiting scroll 300 to revolve through the eccentric shaft 520, the eccentric block 510, and the bearing 610. As the orbiting scroll 300 revolves, each of the plurality of working chambers defined between the sidewalls of the fixed scroll 220 and the orbiting scroll 320 will move in the direction of an involute from the periphery of the fixed scroll 220 and the orbiting scroll 320 toward the center thereof, and the volume of each working chamber will gradually decrease as it moves, so as to compress the medium contained therein. In addition, when moving to the center of the fixed scroll 220 and the orbiting scroll 320, the working chamber will communicate with the central outlet 230 provided in the fixed plate body 210, so as to discharge the compressed medium through the central outlet 230. Therefore, during the operation of the scroll compressor 10, the medium (e.g., air, nitrogen, or a refrigerant such as R22, HFC, etc.) can enter the working chamber from the periphery of the fixed scroll 220 and the orbiting scroll 320, then be moved and compressed toward the center of the fixed scroll 220 and the orbiting scroll 320 by the working chamber, and finally be discharged through the central outlet 230. Therefore, as the orbiting scroll 300 continuously revolves, the medium can be continuously moved, compressed, and discharged in the above-described manner.
[0032] Reference will now be made in detail to the structure of the fixed scroll and the orbiting scroll, with reference to Figure 2 and Figure 3 The structure of the fixed scroll and the orbiting scroll will be described in more detail, wherein, Figure 2 A schematic perspective view of the fixed scroll of the scroll compressor shown in FIG. 1 is shown in FIG. 2, Figure 1 A schematic perspective view of the orbiting scroll of the scroll compressor shown in FIG. 1 is shown in FIG. 3. As Figure 3 Figure 1 A schematic perspective view of the orbiting scroll of the scroll compressor shown in FIG. 1 is shown in FIG. 3. As Figure 1 and Figure 2 As shown, the static disc body 210 has a proximal surface 211 facing the dynamic scroll 300 and a distal surface 212 opposite the proximal surface 211, that is, spaced apart from the proximal surface 211 along the axial direction XX', wherein the central outlet 230 extends from the proximal surface 211 up to the distal surface 212 to enable the compressed medium to be discharged from the side close to the dynamic scroll 300 to the side away from the dynamic scroll 300 through the central outlet 230. The static scroll 220 protrudes from the proximal surface 211 of the static disc body 210 along the axial direction XX' and terminates at the top 221 thereof, so that the top 221 of the static scroll 220 is spaced apart from the proximal surface 211 of the static disc body 210 along the axial direction XX'. When viewed along the axial direction XX', the static scroll 220 extends along the direction of the involute from an inner end 222 close to the base circle of the involute to an outer end 223 away from the base circle of the involute, and the static scroll 220 also has an inner side wall 224 and an outer side wall 225 between the top 221 thereof and the proximal surface 211 of the static disc body 210, wherein the inner side wall 224 and the outer side wall 225 are located on both sides of the top 221 and also extend along the direction of the involute from the inner end 222 to the outer end 223, in other words, the inner side wall 224 and the outer side wall 225 are connected to each other through the inner end 222 and the outer end 223, and the base circle radius of the involute followed by the inner side wall 224 is smaller than the base circle radius of the involute followed by the outer side wall 225, so that the inner side wall 224 is located inside the outer side wall 225, in other words, the inner side wall 224 is surrounded by the outer side wall 225. In addition, the central outlet 230 is located inside the inner side wall 224 at a position close to the inner end 222, in particular, the central outlet 230 is located inside the base circle of the involute followed by the inner side wall 224.
[0033] As Figure 1 and Figure 3As shown, similar to the stationary scroll 200, the moving scroll body 310 has a proximal surface 311 facing the stationary scroll 200 and a distal surface 312 opposite to the proximal surface 311 (that is, spaced apart from the proximal surface 311 along the axial direction XX'), wherein the bearing housing 330 is disposed on the distal surface 312. The moving scroll body 320 protrudes from the proximal surface 311 of the moving scroll body 310 along the axial direction XX' and terminates at its top 321, such that the top 321 of the moving scroll body 320 is spaced apart from the proximal surface 311 of the moving scroll body 310 along the axial direction XX'. When viewed along the axial direction XX', the moving vortex body 320 extends along the involute direction from the inner end 322 near the base circle of the involute to the outer end 323 away from the base circle of the involute. The moving vortex body 320 also has an inner sidewall 324 and an outer sidewall 225 located between its top 321 and the proximal surface 311 of the moving disk body 310. The inner sidewall 324 and the outer sidewall 325 are located on both sides of the top 321 and also extend along the involute direction from the inner end 322 to the outer end 323. In other words, the inner sidewall 324 is connected to the outer sidewall 325 through the inner end 322 and the outer end 323. The base circle radius of the involute followed by the inner sidewall 324 is smaller than the base circle radius of the involute followed by the outer sidewall 325, so that the inner sidewall 324 is inside the outer sidewall 325. In other words, the inner sidewall 324 is surrounded by the outer sidewall 325.
[0034] The compression process of the medium is described below, referring to the cross-sectional views of the stationary and moving scrolls 220 and 320 that are joined together, based on the description of the stationary scroll and moving scroll above. (Reference) Figures 4a-4d , which shows along Figure 1 The diagram shows schematic cross-sectional views of a stationary vortex and a moving vortex at different positions, intercepted by line IV-IV. For clarity, the outlines of the stationary and moving vortices are shown as dashed lines. Figures 4a-4d As shown, the stationary vortex body 220 and the moving vortex body 320 define multiple pairs of working chambers arranged from the outside to the inside along the involute direction. Each pair of working chambers includes two working chambers symmetrically arranged about the centers of the two vortices (in other words, about the center of the involute base circle). Specifically, in Figures 4a-4d In the illustrated embodiment, three pairs of working chambers a1, a2, b1, b2 and c1, c2 are defined, including a pair of working chambers a1, a2 located on the periphery, a pair of working chambers b1, b2 located in the middle, and a pair of working chambers c1, c2 located in the center. Working chambers a1, b1 are defined between the inner wall 224 of the stationary vortex body 220 and the outer wall 325 of the moving vortex body 320, while working chambers a2, b2 are defined between the outer wall 225 of the stationary vortex body 220 and the inner wall 324 of the moving vortex body 320. When the moving vortex body 320 is in...Figure 4a When the first position shown is reached, the working chambers a1, a2 are open to allow the medium to be compressed to enter the working chambers a1, a2, while the working chambers b1, b2 and the working chambers c1, c2 that have already contained the medium are closed. When the orbiting scroll 320 orbits from Figure 4a to the second position shown Figure 4b When the second position shown is reached, the working chambers a1, a2 move towards the center of the two scrolls and are closed, the working chambers b1, b2 move towards the center of the two scrolls and the volume is reduced, the working chambers c1, c2 reach the center of the two scrolls and the volume is reduced, which causes the medium in the working chambers a1, a2, b1, b2 to be moved towards the center of the two scrolls and compressed, and the medium in the working chambers c1, c2 can be discharged through the central outlet 230. When the orbiting scroll 320 further orbits from Figure 4b to the third position shown Figure 4c When the third position shown is reached, the working chambers a1, a2, b1, b2 further move towards the center of the two scrolls and the volume is further reduced, the working chambers c1, c2 are still located at the center of the two scrolls and the volume is further reduced, which causes the medium in the working chambers a1, a2, b1, b2 to be further moved towards the center of the two scrolls and further compressed, and the medium in the working chambers c1, c2 can be further discharged through the central outlet 230. When the orbiting scroll 320 further orbits from Figure 4c to the fourth position shown Figure 4d When the fourth position shown is reached, the working chambers a1, a2, b1, b2 further move towards the center of the two scrolls and the volume is further reduced, the working chambers c1, c2 reach the minimum volume, which causes the medium in the working chambers a1, a2, b1, b2 to be further moved towards the center of the two scrolls and further compressed, and the medium in the working chambers c1, c2 is completely discharged through the central outlet 230, thereby ending one compression process and starting a new compression process as the orbiting scroll 300 orbits.
[0035] Since the two working chambers in each pair of working chambers are symmetrically arranged about the center of the scrolls, if the pressure in the two working chambers in a certain pair of working chambers is not equal, that is, if there is a pressure imbalance between the two working chambers symmetrically arranged about the center of the scrolls, the orbiting scroll can be caused to shake radially during the orbiting, and the radial shaking can in turn cause the stationary scroll and the orbiting scroll to collide with each other, the wear to be aggravated, and even cause the orbiting scroll to overturn, thereby causing tangential leakage. However, as shown in Figure 4c and Figure 4d Since the central outlet 230 is arranged in the stationary scroll 210 to move relatively with the orbiting scroll 300, when the orbiting scroll 320 orbits fromFigure 4c the third position shown is toward Figure 4d When the fourth position shown is moved, working chamber b1 (may also be referred to as a first working chamber) will be in communication with the central outlet 230, but working chamber b2 (may also be referred to as a second working chamber) will not be in communication with the central outlet 230 due to the inner end portion 222 of the static scroll 220 being in contact with the inner side wall 324 of the dynamic scroll 320, which results in working chamber b1 being in communication with the central outlet 230 prior to working chamber b2. Thus, when the dynamic scroll 320 is moved from Figure 4c the third position shown is toward Figure 4d When the fourth position shown is moved, working chamber b1 will discharge the medium prior to working chamber b2, during which the pressure in working chamber b1 is less than the pressure in working chamber b2, that is, a pressure imbalance is generated between working chamber b1 and working chamber b2 due to the inability to be in communication with the central outlet 230 at the same time. In addition, it is worth mentioning that the pressure imbalance caused by the above problem will only occur between working chamber b1 near the inner end portion 322 of the dynamic scroll 320 and limited between the outer side wall 325 of the dynamic scroll and the inner side wall 224 of the static scroll 220, and working chamber b2 near the inner end portion 222 of the static scroll 220 and limited between the outer side wall 225 of the static scroll 220 and the inner side wall 324 of the dynamic scroll 320, and other pairs of working chambers will not have such a pressure imbalance due to being in communication with the central outlet 230 (for example, working chambers a1, a2) or being in communication with the central outlet 230 (for example, working chambers c1, c2).
[0036] To solve the above problem, the scroll compressor 10 is provided with an auxiliary groove 700 in the static scroll 200 and / or the dynamic scroll 300, which is configured to provide or form a passage that communicates the central outlet 230 with working chamber b2 when the dynamic scroll 300 is moved to a position that makes the central outlet 230 in communication with working chamber b1. That is, when the dynamic scroll 300 is moved to a position that makes the central outlet 230 in communication with working chamber b1, at this time the inner end portion 222 of the static scroll 220 is in contact with the inner side wall 324 of the dynamic scroll 320 as described above, the auxiliary groove 700 can provide or form a passage that extends across the inner end portion 222 of the static scroll 220 to communicate the central outlet 230 with working chamber b2.
[0037] In the above configuration, when the center outlet 230 communicates with the working chamber b1, the auxiliary groove 700 can form a passage to communicate the center outlet 230 with the working chamber b2, so that when the working chamber b1 discharges medium through the center outlet 230, the working chamber b2 can discharge medium to the center outlet 230 through the formed passage, so that the pressure balance between the working chamber b1 and the working chamber b2 can be ensured, and in addition, since the working chambers a1, a2 are not communicated with the center outlet 230 and the working chambers c1, c2 are communicated with the center outlet 230, the pressure balance between each pair of working chambers is ensured, so that the radial swing of the orbiting scroll 300 during the orbiting can be significantly reduced, and thus the risk of the orbiting scroll 320 overturning and the tangential leakage between the orbiting scroll 320 and the fixed scroll 220 can be avoided, and the wear and noise of the orbiting scroll 320 and the fixed scroll 220 can be alleviated.
[0038] According to an optional embodiment, as shown in Figure 2 and Figures 4a-4d The auxiliary groove 700 is formed in the proximal surface 211 of the fixed scroll 210, that is, recessed from the proximal surface 211 of the fixed scroll 210 along the axial direction XX’. In addition, the auxiliary groove 700 also communicates with or leads to the center outlet 230, and extends from the center outlet 230 around the inner end portion 222 of the fixed scroll 220 and across the inner end portion 222 of the fixed scroll 220. That is, the auxiliary groove 700 has a proximal end 710 close to the center outlet 230 and a distal end 720 away from the center outlet 230, and extends around the inner end portion 222 of the fixed scroll 220 between the proximal end 710 and the distal end 720, so that the auxiliary groove 700 generally has a shape curved towards the inner end portion 222 of the fixed scroll 220, that is, the concave side of the curved shape faces the inner end portion 222 of the fixed scroll 220. In addition, the auxiliary groove 700 also leads to the center outlet 230 at the proximal end 710, and the distal end 720 is located on both sides of the inner end portion 222 of the fixed scroll 220 with the center outlet 230. In this configuration, when the working chamber b1 communicates with the center outlet 230, the working chamber b2 can communicate with the center outlet 230 through the auxiliary groove 700, so that the pressure balance between the working chamber b1 and the working chamber b2 can be ensured.
[0039] In particular, as shown in Figure 2 and Figures 4a-4dAs shown, the sidewall of the auxiliary groove 700 is tangent to the sidewall of the central outlet 230 at its proximal end 710. That is, when viewed along the axial direction XX', the profile of the auxiliary groove 700 is tangent to the profile of the central outlet 230 at its proximal end 710. With this configuration, the sidewall of the auxiliary groove 700 can smoothly transition to the sidewall of the central outlet 230 at its proximal end 710, thereby ensuring that the medium in the working chamber b2 can be smoothly discharged into the central outlet 230 through the auxiliary groove 700, thus more reliably ensuring the pressure balance between the working chambers b1 and b2.
[0040] In particular, such as Figure 2 as well as Figures 4a-4d As shown, the auxiliary channel 700 narrows from the proximal end 710 to the distal end 720, meaning it has its maximum width at the proximal end 710 and its minimum width at the distal end 720. In this configuration, since the medium in the working chamber b2 enters the auxiliary channel 700 at the distal end 720 and then enters the central outlet 230 at the proximal end 710, making the width of the proximal end 710 greater than the width of the distal end 720 reduces the flow velocity of the medium discharged from the proximal end 710 to the central outlet 230. This allows the central outlet 230 to discharge the medium more stably, which also helps to more reliably ensure pressure balance between the working chambers b1 and b2. More specifically, the central outlet 230 has a generally circular profile, thus forming a shape resembling a "whale" or a "comma" together with the auxiliary channel 700. In this configuration, the central outlet 230 and the auxiliary trench 700 provide a large flow area for the media in working chambers b1 and b2, thereby ensuring that the media in both working chambers can be discharged smoothly.
[0041] In particular, such as Figure 4c As shown, during the revolution of the moving scroll 300 around the axial direction XX', the moving scroll 300 is adapted to move to a position (e.g., Figure 4c (As shown in the third position), in this position, the inner wall 324 of the moving vortex 320 is tangent to the sidewall of the auxiliary groove 700, and the outer wall 325 of the moving vortex 320 is tangent to the sidewall of the central outlet 230. That is, in the above position, when viewed along the axial direction XX', the outline of the inner wall 324 of the moving vortex 320 is tangent to the outline of the auxiliary groove 700, and the outline of the outer wall 325 of the moving vortex 320 is tangent to the outline of the central outlet 230. In this configuration, when the moving vortex 300 is in... Figure 4cAt the third position shown, by tangency of the two sets of profiles described above, the orbiting scroll 320 can prevent the central outlet 230 from communicating with the working chamber b1 and simultaneously prevent the auxiliary groove 700 from communicating with the working chamber b2, while when the orbiting scroll 300 is moved away from the third position (e.g., moved to Figure 4d the fourth position shown), the inner side wall 324 of the orbiting scroll 320 will intersect (also referred to as cross) the side wall of the auxiliary groove 700, while the outer side wall 325 of the orbiting scroll 320 will intersect the side wall of the central outlet 230, which makes the orbiting scroll 320 allow the central outlet 230 to communicate with the working chamber b1 and simultaneously allow the auxiliary groove 700 to communicate with the working chamber b2, the simultaneous communication described above makes the working chamber b1 and the working chamber b2 can simultaneously discharge the medium, thereby can ensure that the working chamber b1 and the working chamber b2 maintain pressure balance at any moment, so that the orbiting scroll 300 does not exist radial swing caused by pressure imbalance between working chambers at any moment.
[0042] In particular, as Figure 2 shown, the auxiliary groove 700 is recessed from the proximal surface 211 of the fixed scroll body 210 and terminates at its bottom 730, that is, the auxiliary groove 700 does not extend through the fixed scroll body 210, in other words, the auxiliary groove 700 does not constitute a through hole, but only extends through a part of the thickness of the fixed scroll body 210, so that the bottom 730 of the auxiliary groove 700 is spaced apart from both the proximal surface 211 and the distal surface 212 of the fixed scroll body 210. In this configuration, the strength of the fixed scroll body 210 can be taken into account while ensuring the pressure balance between the working chambers, thereby avoiding adversely affecting the reliability of the fixed scroll 200. Of course, this embodiment is only exemplary, in other embodiments, the auxiliary groove 700 can also have other configurations. For example, referring to Figure 5 where a schematic perspective view of a fixed scroll of a scroll compressor according to another embodiment of the present disclosure is shown, which is different from Figure 2 and Figures 4a-4d the embodiment shown in that the auxiliary groove 700 extends through the fixed scroll body 210 like the central outlet 230. In this configuration, the medium in the working chamber b2 can be directly discharged through the auxiliary groove 700, without first being discharged through the auxiliary groove 700 into the central outlet 230 and then being discharged through the central outlet 230, thereby the flow area for discharging the medium can be maximized, which not only makes the medium in the working chamber b1 and the medium in the working chamber b2 can be smoothly discharged, thereby helping to more reliably ensure the pressure balance between the working chambers, but also makes the medium in the working chambers c1, c2 can be smoothly discharged, thereby helping to further improve the working performance of the scroll compressor 10.
[0043] Although the above relies on Figures 2-5 An embodiment in which an auxiliary groove is provided in a stationary scroll plate has been described; however, this is merely exemplary, and in other embodiments, the auxiliary groove may also be provided in a moving scroll plate. For example, refer to... Figure 6 The illustration shows a schematic perspective view of the moving scroll of a scroll compressor according to another embodiment of the present disclosure, and... Figures 2-5 The difference in the illustrated embodiment is that the auxiliary groove 700 is provided on the moving volute 320 of the moving volute 300. Specifically, as shown... Figure 6 As shown, the auxiliary groove 700 is recessed from the top 321 of the moving scroll body 320 along the axial direction XX' and extends from the inner end 322 of the moving scroll body 320 to the inner wall 324 of the moving scroll body 320. That is, the auxiliary groove 700 is open toward the inner wall 324 of the moving scroll body 320 and has a proximal end 710 located on the inner end 322 of the moving scroll body 320 and a distal end 720 located on the inner wall 324 of the moving scroll body 320. In this configuration, since the auxiliary groove 700 is recessed from the top 321 of the moving scroll body 320 and extends from the proximal end 710 located on the inner end 322 of the moving scroll body 320 to the distal end 720 located on the inner wall 324 of the moving scroll body 320, when the moving scroll body 320 is in… Figure 4d In the fourth position shown, the auxiliary groove 700 can extend across the inner end 222 of the stationary vortex body 220, thereby connecting the central outlet 230 with the working chamber b2. This allows the media in both the working chamber b1 and the working chamber b2 to be discharged through the central outlet 230, thus ensuring pressure balance between the working chamber b1 and the working chamber b2.
[0044] In particular, such as Figure 6 As shown, the auxiliary groove 700 is recessed from the top 321 of the moving scroll body 320 and terminates at its bottom 730. That is, the auxiliary groove 700 does not extend to the proximal surface 311 of the moving disk body 310; in other words, the auxiliary groove 700 does not extend over the entire height of the moving scroll body 320, but only over a portion of its height, so that the bottom 730 of the auxiliary groove 700 is spaced apart from both the proximal surface 311 of the moving disk body 310 and the top 321 of the moving scroll body 320. With this configuration, pressure balance between the various working chambers can be ensured while maintaining the strength of the moving scroll body 320, thereby avoiding any adverse impact on the reliability of the moving scroll 300. Of course, this implementation is merely exemplary. In an embodiment not shown, the auxiliary groove 700 may also extend from the top 321 of the moving vortex body 320 to the proximal surface 311 of the moving disk body 310. That is, the auxiliary groove 700 may also extend over the entire height of the moving vortex body 320.
[0045] In particular, during the revolution of the orbiting scroll 300 around the axial direction XX', the orbiting scroll 300 is adapted to move to a position (e.g. Figure 4c the third position shown) in which the inner end 222 of the fixed scroll 220 is tangent to the inner side wall 324 of the orbiting scroll 320 at the distal end 720 of the auxiliary groove 700, and the outer side wall 325 of the orbiting scroll 320 is tangent to the side wall of the central outlet 230. That is, in the above-mentioned position, the profile of the inner end 222 of the fixed scroll 220 is tangent to the profile of the inner side wall 324 of the orbiting scroll 320 at the distal end 720 of the auxiliary groove 700, and the profile of the outer side wall 325 of the orbiting scroll 320 is tangent to the profile of the central outlet 230 when viewed along the axial direction XX'. In this configuration, when the orbiting scroll 300 is in the third position shown, the orbiting scroll 320 can prevent the central outlet 230 from communicating with the working chamber b1, and at the same time the fixed scroll 220 can prevent the auxiliary groove 700 from communicating with the working chamber b2, while when the orbiting scroll 300 moves away from this third position (e.g. to the fourth position shown) Figure 4c , the distal end 720 of the auxiliary groove 700 will cross the inner end 222 of the fixed scroll 220, while the outer side wall 325 of the orbiting scroll 320 will intersect the side wall of the central outlet 230, which makes the orbiting scroll 320 allow the central outlet 230 to communicate with the working chamber b1, and at the same time the fixed scroll 220 will allow the auxiliary groove 700 to communicate with the working chamber b2, the above-mentioned simultaneous communication allowing the working chamber b1 and the working chamber b2 to simultaneously discharge the medium, thereby ensuring that the working chamber b1 and the working chamber b2 maintain pressure balance at any moment, so that the orbiting scroll 300 does not exist radial swing caused by pressure imbalance between working chambers at any moment. Figure 4d
[0046] It should be noted that although the auxiliary grooves are shown in different ways in Figure 6 , the embodiments shown in Figure 6 may be combined with the embodiments shown in Figures 2-4d and the embodiments shown in Figure 5 , so that in a scroll compressor according to one unshown embodiment of the present disclosure, the fixed scroll 200 and the orbiting scroll 320 of the orbiting scroll 300 are both provided with an auxiliary groove 700 for communicating the working chamber b2 with the central outlet 230 when the working chamber b1 communicates with the central outlet 230. It can be understood by those skilled in the art that the above-mentioned embodiments are also within the protection scope of the present disclosure.
[0047] The above has described in detail, with the aid of the drawings, alternative but non-limiting embodiments of the scroll compressor according to the present disclosure. Modifications and supplements to the technology and structure, as well as recombination of features in the various embodiments, which are obvious to those of ordinary skill in the art without departing from the spirit and essence of the present disclosure, should all be considered to be included within the scope of the present disclosure. Therefore, these modifications and supplements that can be conceived under the teaching of the present disclosure should be considered to be part of the present disclosure. The scope of the present disclosure includes equivalent technology known at the filing date of the present disclosure and equivalent technology not yet foreseen.
Claims
1. A scroll compressor characterized by comprising: Comprise: a fixed static scroll (200) comprising a static scroll body (210) provided with a central outlet (230) and a static scroll wrap (220) protruding from a surface of the static scroll body (210); and a movable dynamic scroll (300) comprising a dynamic scroll body (310) and a dynamic scroll wrap (320) protruding from a surface of the dynamic scroll body (310), wherein the static scroll wrap (220) and the dynamic scroll wrap (320) respectively extend along an involute and engage with each other to define a plurality of working chambers, the plurality of working chambers comprising a first working chamber (b1) proximate to an inner end of the dynamic scroll wrap (320) and defined between an outer side wall of the dynamic scroll wrap (320) and an inner side wall of the static scroll wrap (220), and a second working chamber (b2) proximate to an inner end of the static scroll wrap (220) and defined between an outer side wall of the static scroll wrap (220) and an inner side wall of the dynamic scroll wrap (320), and wherein the static scroll (200) and / or the dynamic scroll (300) is provided with an auxiliary channel (700) configured to communicate the second working chamber (b2) with the central outlet (230) when the first working chamber (b1) is in communication with the central outlet (230).
2. The scroll compressor of claim 1, wherein The inner end of the static scroll wrap (220) is configured to be in contact with the inner side wall of the dynamic scroll wrap (320) when the first working chamber (b1) is in communication with the central outlet (230), and the auxiliary channel (700) is configured to extend across the inner end of the static scroll wrap (220) when the first working chamber (b1) is in communication with the central outlet (230).
3. The scroll compressor according to claim 1 or 2, characterized in that, The auxiliary channel (700) is formed in the static scroll body (210) and recessed from a surface of the static scroll body (210), and the auxiliary channel (700) opens to the central outlet (230) at a proximal end (710) and extends from the proximal end (710) across the inner end of the static scroll wrap (220) to a distal end (720).
4. The scroll compressor of claim 3, wherein The distal end (720) of the auxiliary channel (700) is located on both sides of the inner end of the static scroll wrap (220) from the central outlet (230).
5. The scroll compressor of claim 3, wherein The auxiliary channel (700) extends around the inner end of the static scroll wrap (220) between the proximal end (710) and the distal end (720) such that the auxiliary channel (700) has a shape curved towards the inner end of the static scroll wrap (220).
6. The scroll compressor of claim 3, wherein A side wall of the auxiliary channel (700) is tangent to a side wall of the central outlet (230) at the proximal end (710).
7. The scroll compressor of claim 3, wherein The auxiliary channel (700) narrows in a direction from the proximal end (710) to the distal end (720).
8. The scroll compressor of claim 3, wherein The dynamic scroll (300) is adapted to be moved to a position such that an outer side wall of the dynamic scroll wrap (320) is tangent to a side wall of the central outlet (230) and an inner side wall of the dynamic scroll wrap (320) is tangent to a side wall of the auxiliary channel (700).
9. The scroll compressor of claim 3, wherein The auxiliary groove (700) extends from a surface of the static scroll body (210) to a partial thickness of the static scroll body (210).
10. The scroll compressor of claim 3, wherein The auxiliary groove (700) extends through the static scroll body (210).
11. The scroll compressor of claim 1 or 2, wherein The auxiliary groove (700) is formed in the moving scroll body (320) and is recessed from a top of the moving scroll body (320), and the auxiliary groove (700) extends from a proximal end (710) on an inner end of the moving scroll body (320) to a distal end (720) on an inner side wall of the moving scroll body (320).
12. The scroll compressor of claim 11, wherein, The moving scroll (300) is adapted to move to a position such that an inner end of the static scroll (220) is tangent to an inner side wall of the moving scroll (320) at the distal end (720) of the auxiliary groove (700) and an outer side wall of the moving scroll (320) is tangent to a side wall of the central outlet (230).
13. The scroll compressor of claim 11, wherein The auxiliary groove (700) extends from a top of the moving scroll body (320) to a partial height of the moving scroll body (320).
14. The scroll compressor of claim 11, wherein, The auxiliary groove (700) extends from a top of the moving scroll body (320) to a surface of the moving scroll body (310).