Scroll compressor

Abstract

The utility model relates to a scroll compressor, which is provided with a plurality of groups of bypass holes for adjusting the displacement of the compressor, a plurality of modulation rings and a flow introduction device. The plurality of modulation rings includes at least a first modulation ring for covering the first set of bypass holes and a second modulation ring for covering the second set of bypass holes, the first modulation ring and the second modulation ring defining a first modulation cavity and a second modulation cavity. The flow introduction device is configured to selectively introduce a first high-pressure fluid or a first low-pressure fluid into the first modulation cavity and selectively introduce a second high-pressure fluid or a second low-pressure fluid into the second modulation cavity so as to control the movement of the first modulation ring and the second modulation ring; and the first group of bypass holes and / or the second group of bypass holes are covered or exposed, so that at least three-stage displacement adjustment of the scroll compressor is realized with a simple structure.

Description

Technical Field

[0001] The present disclosure relates to the field of compressors, and in particular to a scroll compressor capable of performing multi-stage displacement adjustment. Background Art

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

[0003] In some scroll compressors, a bypass hole located at the medium-pressure compression chamber and a corresponding modulation ring are often provided. The modulation ring can be moved to expose or block the bypass hole, thereby selectively allowing the medium-pressure compression chamber to circulate or disconnect with the low-pressure side fluid, thereby changing the displacement of the scroll compressor without changing the rotation speed of the scroll compressor. Conventional scroll compressors can usually only achieve two-stage displacement adjustment, but in practical applications, it is hoped to increase the number of adjustable displacement levels of the scroll compressor, thereby further improving the compressor efficiency under low-displacement operating conditions. Utility Model Content

[0004] One object of the present disclosure is to provide a scroll compressor capable of achieving multi-stage displacement regulation. Another object of the present disclosure is that when the system is running under light load, the compressor can better match the cooling capacity and improve efficiency.

[0005] One aspect of the present disclosure provides a scroll compressor. The scroll compressor includes a housing and a compression mechanism. The compression mechanism includes a fixed scroll component and a movable scroll component. The fixed scroll component and the movable scroll component cooperate with each other to form a series of compression chambers, and the fixed scroll component is provided with a plurality of groups of bypass holes extending from the outer surface of the fixed scroll component to the compression chamber, and the plurality of groups of bypass holes include a first group of bypass holes and a second group of bypass holes, and the second group of bypass holes is located radially inside the first group of bypass holes. The scroll compressor also includes a fluid introduction device and a plurality of modulation rings. Each of the plurality of modulation rings is configured to cover a corresponding group of bypass holes in the plurality of groups of bypass holes. The plurality of modulation rings include a first modulation ring and a second modulation ring, and the second modulation ring is arranged radially inside the first modulation ring. The first modulation ring has a first fluid action surface and a second fluid action surface in opposite directions, the second modulation ring has a third fluid action surface and a fourth fluid action surface in opposite directions, the second fluid action surface is arranged opposite to the third fluid action surface, a pressurization chamber is defined at the first fluid action surface, a first modulation chamber is defined between the second fluid action surface and the third fluid action surface, and a second modulation chamber is defined at the fourth fluid action surface. The fluid introduction device is configured to selectively introduce the first high-pressure fluid or the first low-pressure fluid into the first modulation chamber, and selectively introduce the second high-pressure fluid or the second low-pressure fluid into the second modulation chamber. The pressure of the first high-pressure fluid and the pressure of the second high-pressure fluid are equal to or greater than the fluid pressure in the pressurization chamber, and the pressure of the first low-pressure fluid and the pressure of the second low-pressure fluid are less than the fluid pressure in the pressurization chamber and less than the pressure of the first high-pressure fluid and the pressure of the second high-pressure fluid. Multiple modulation rings are configured such that: when a first low-pressure fluid is introduced into a first modulation chamber and a second low-pressure fluid is introduced into a second modulation chamber, the first modulation ring covers the first group of bypass holes and the second modulation ring covers the second group of bypass holes, so that the scroll compressor is in a full load state; when a first high-pressure fluid is introduced into the first modulation chamber and a second low-pressure fluid is introduced into the second modulation chamber, the first modulation ring moves to expose the first group of bypass holes and the second modulation ring covers the second group of bypass holes, so that the scroll compressor is in a first partial load state; when a second high-pressure fluid is introduced into the second modulation chamber, the first modulation ring moves to expose the first group of bypass holes and the second modulation ring moves to expose the second group of bypass holes, so that the scroll compressor is in a second partial load state.

[0006] In some embodiments, the area of ​​the second fluid action surface may be greater than the area of ​​the first fluid action surface, and the area of ​​the fourth fluid action surface may be greater than the area of ​​the first fluid action surface.

[0007] In some embodiments, the pressurization chamber may be in communication with an exhaust port of the compression mechanism.

[0008] In some embodiments, the fluid introduction device may be configured to introduce the exhaust gas of the scroll compressor into the first modulation chamber and / or the second modulation chamber as the first high-pressure fluid and / or the second high-pressure fluid.

[0009] In some embodiments, the fluid introduction device may be configured to introduce the fluid in the low-pressure chamber in the housing into the first modulation chamber and / or the second modulation chamber as the first low-pressure fluid and / or the second low-pressure fluid.

[0010] In some embodiments, the first modulation ring may include a first fluid channel extending from the outer surface of the first modulation ring to the first modulation chamber and a second fluid channel extending from the outer surface of the first modulation ring to the pressurized chamber, and the fluid introduction device may be configured to enable the first fluid channel to selectively connect with the second fluid channel or with the low-pressure chamber in the shell.

[0011] In some embodiments, the fixed scroll component may include a third fluid channel extending from the outer surface of the fixed scroll component to the second modulation chamber and a fourth fluid channel extending from the outer surface of the fixed scroll component to the exhaust port of the compression mechanism, and the fluid introduction device is configured to enable the third fluid channel to selectively connect with the fourth fluid channel or with the low-pressure chamber in the shell.

[0012] In some embodiments, a first set of bypass holes may communicate with a low pressure cavity in the housing when the scroll compressor is in a first partial load state, and a second set of bypass holes may communicate with the low pressure cavity in the housing when the scroll compressor is in a second partial load state.

[0013] In some embodiments, the fluid introduction device may include a first fluid introduction device for introducing fluid into the first modulation chamber and a second fluid introduction device for introducing fluid into the second modulation chamber.

[0014] In some embodiments, the fluid introduction device may include a solenoid valve.

[0015] In some embodiments, a seal may be provided between the first modulation chamber and the pressurization chamber, between the first modulation chamber and the second modulation chamber, between the first modulation chamber and the first group of bypass holes, and / or between the second modulation chamber and the second group of bypass holes.

[0016] In some embodiments, the fixed scroll component may include an end plate and a hub extending from the end plate, the plurality of groups of bypass holes are disposed on the end plate, and the first and second modulation rings are positioned around the hub and radially outward of the hub.

[0017] In some embodiments, the first modulation ring may be configured in an annular stepped shape to receive the second modulation ring radially inside the first modulation ring.

[0018] The scroll compressor according to the present disclosure is provided with at least two modulation rings for correspondingly covering or exposing at least two groups of bypass holes, and the fluid force on the two modulation rings is changed by introducing fluids of different pressures into the modulation chamber through a fluid introduction device, so that the two modulation rings cover or expose at least two groups of bypass holes according to a desired mode, and at least three-level displacement adjustment of the scroll compressor is realized with a simple structure. Furthermore, the scroll compressor according to the present disclosure can be set with a smaller displacement than that of a conventional compressor, thereby improving the efficiency of the scroll compressor under low displacement operating conditions.

[0019] Other application fields of the present disclosure will become more apparent from the following detailed description.It should be understood that these detailed descriptions and specific examples, although showing preferred embodiments of the present disclosure, are intended for illustrative purposes rather than intended to limit the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Embodiments of the present disclosure will be described below by way of example only with reference to the accompanying drawings. In the accompanying drawings, the same features or components are represented by the same reference numerals. The accompanying drawings are not necessarily drawn to scale, for example, certain components may be shown in an exaggerated form for the sake of clarity. In the accompanying drawings:

[0021] Figure 1 shows a longitudinal cross-sectional view of a scroll compressor according to one embodiment of the present disclosure;

[0022] Figure 2 Shows Figure 1 A top view of a portion of a scroll compressor assembly;

[0023] Figure 3 The scroll compressor is shown in Figure 2. Figure 2 A cross-sectional view taken along line AA in FIG.

[0024] Figure 4 The first partial load state of the scroll compressor is shown along Figure 2 A cross-sectional view taken along line AA in FIG.

[0025] Figure 5 The first partial load state of the scroll compressor is shown along Figure 2 A cross-sectional view taken along line BB in FIG.

[0026] Figure 6 The second partial load state of the scroll compressor is shown along Figure 2 A cross-sectional view taken along line AA in FIG.

[0027] Figure 7 The second partial load state of the scroll compressor is shown along Figure 2A cross-sectional view taken along line CC in FIG.

[0028] Figure 8 Shows Figure 1 A top view of a fixed scroll component of a scroll compressor;

[0029] Fig. 9 Shows Figure 1 A perspective view of a first modulation ring of a scroll compressor;

[0030] Fig.10 Shows Fig. 9 A side view of the first modulation ring in FIG.

[0031] Fig.11 Shown along Fig.10 A cross-sectional view of the first modulation ring taken along line DD in FIG.

[0032] Fig.12 Shows the Figure 1 A cross-sectional view taken in an axial section through one diameter of a second modulation ring of a scroll compressor. DETAILED DESCRIPTION

[0033] Example embodiments will now be described more fully with reference to the accompanying drawings.

[0034] Exemplary embodiments are provided so that the present disclosure will be exhaustive and will more fully convey the scope to those skilled in the art. Many specific details such as examples of specific components, devices, and methods are described to provide a thorough understanding of the various embodiments of the present disclosure. It will be clear to those skilled in the art that specific details need not be employed, and that the exemplary embodiments can be implemented in many different forms and should not be construed as limiting the scope of the present disclosure. In some exemplary embodiments, well-known processes, well-known device structures, and well-known technologies are not described in detail.

[0035] In the following description, if used, the directional terms related to "upper" and "lower" used are described by the upper and lower positions of the views shown in the accompanying drawings. In practical applications, the positional relationship of "upper" and "lower" used in this article can be defined according to actual conditions, and these relationships can be reversed and should not be understood as limiting the scope of the present disclosure.

[0036] First refer to Figures 1 to 12 A scroll compressor 1 according to one embodiment of the present disclosure will be described. Figure 1 1 shows a longitudinal cross-sectional view of a scroll compressor 1. Figure 1 As shown, the scroll compressor 1 may include a housing 10 , a compression mechanism 20 , a driving mechanism 30 for driving the compression mechanism 20 , and the like.

[0037] The shell 10 may include a housing 11 enclosing a compression mechanism 20 and a driving mechanism 30, and a silencer cover 12 arranged in the housing 11. The silencer cover 12 separates the space inside the housing 11 into a high-pressure chamber 61 and a low-pressure chamber 62. The shell 10 may also include a mounting insert 13 fixedly mounted in the opening of the silencer cover 12. The mounting insert 13 is configured as a generally annular stepped sleeve to support the silencer cover 12 and define an exhaust passage approximately at the center of the mounting insert 13. In other embodiments, the shell may also be configured in any other suitable form, for example, the mounting insert 13 may be formed as an integral piece with the silencer cover 12 or omitted, and for another example, the shell 11 may not completely enclose the compression mechanism 20 and / or the driving mechanism 30.

[0038] The compression mechanism 20 includes a fixed scroll component 21 and a movable scroll component 22 that cooperate with each other to compress the working fluid. The scroll compressor 1 may also include a plurality of modulation rings and a fluid introduction device for adjusting the displacement of the scroll compressor 1. In this embodiment, the scroll compressor 1 includes a first modulation ring 41, a second modulation ring 42, a first fluid introduction device 51, and a second fluid introduction device 52.

[0039] Figures 2 to 7 The details of the assembly including the muffler cover 12, the mounting insert 13, the compression mechanism 20, the first modulation ring 41, the second modulation ring 42, the first fluid introduction device 51 and the second fluid introduction device 52 are shown, wherein Figure 2 shows a top view of the assembly, Figure 3 The scroll compressor 1 is shown in the full load state along Figure 2 The cross-sectional view taken along line AA in FIG. Figure 4 The first partial load state of the scroll compressor 1 is shown along the Figure 2 The cross-sectional view taken along line AA in FIG. Figure 5 The first partial load state of the scroll compressor 1 is shown along the Figure 2 The cross-sectional view taken along line BB in FIG. Figure 6 The second partial load state of the scroll compressor 1 is shown. Figure 2 The cross-sectional view taken along line AA in FIG. Figure 7 The second partial load state of the scroll compressor 1 is shown. Figure 2 Cross-sectional view taken along line CC in FIG. Figure 8 A top view of the fixed scroll component 21 is shown.

[0040] like Figures 2 to 8As shown, the fixed scroll component 21 may include an end plate 211, and the end plate 211 has an upper surface 211a and a lower surface 211b opposite to each other. The fixed scroll component 21 also includes a fixed scroll 212 extending in an axial direction from the lower surface 211b of the end plate 211. The movable scroll component 22 may include an end plate 221 and a movable scroll 222 extending in an axial direction from the upper surface 221a of the end plate 221. When the scroll compressor 1 is in operation, the drive mechanism 30 drives the movable scroll component 22 to revolve relative to the fixed scroll component 21, and the movable scroll 222 and the fixed scroll 212 are meshed with each other to form a series of compression chambers therebetween, the volume of which gradually decreases from the radial outside to the radial inside. The working fluid enters the compression chamber from the radial outside of the fixed scroll component 21, and after compression, it is discharged from the exhaust port 211c approximately at the center of the end plate 211 of the fixed scroll component 21. As shown in FIG. Figure 3 As shown, the fixed scroll component 21 may also include a hub 213 protruding in the axial direction from the upper surface 211a of the end plate 211. The hub 213 has a body portion 214 that is generally cylindrical in shape around the exhaust port 211c. At the connection between the body portion 214 and the end plate 211, the hub 213 also includes a step portion 215 protruding radially outward from the outer peripheral surface of the body portion 214, and the step portion 215 may have a substantially flat upper surface. The first modulation ring 41 and the second modulation ring 42 are arranged above the end plate 211 of the fixed scroll component 21 and around the hub 213 and arranged on the radial outside of the hub 213. Specifically, the second modulation ring 42 is arranged around the step portion 215, and the first modulation ring 41 is arranged on the radial outside of the second modulation ring 42. In other embodiments, the hub 213 may be provided as a separate component separated from the fixed scroll component 21.

[0041] Combination Figures 3 to 8 As shown, the fixed scroll component 21 is provided with several groups of bypass holes extending from its outer surface to the compression chamber. In the present embodiment, a first group of bypass holes 216 and a second group of bypass holes 217 are provided on the end plate 211 of the fixed scroll component 21, extending from the upper surface 211a of the end plate 211 to the lower surface 211b of the end plate 211 and thus extending to the compression chamber, and the second group of bypass holes 217 are provided on the radial inner side of the first group of bypass holes 216. The first group of bypass holes 216 and the second group of bypass holes 217 can make the corresponding compression chamber fluidically connected with the low-pressure chamber 62 in the housing 10, thereby changing the displacement of the scroll compressor 1. The first modulation ring 41 and the second modulation ring 42 can move in the axial direction relative to the fixed scroll component 21, so that the first group of bypass holes 216 and the second group of bypass holes 217 are covered or exposed by the first modulation ring 41 and the second modulation ring 42, respectively. As shown Figure 3As shown, when the first modulation ring 41 abuts against the upper surface 211a of the end plate 211 and covers the first group of bypass holes 216, and the second modulation ring 42 abuts against the upper surface 211a of the end plate 211 and covers the second group of bypass holes 217, the compression chambers corresponding to the first group of bypass holes 216 and the second group of bypass holes 217 are not connected to the low-pressure chamber 62, and the scroll compressor 1 operates at full load. Figure 4 and Figure 5 As shown, when the first modulation ring 41 moves away from the upper surface 211a of the end plate 211 and the second modulation ring 42 abuts against the upper surface 211a of the end plate 211 and covers the second group of bypass holes 217, the first group of bypass holes 216 are directly exposed to the low-pressure chamber 62, thereby allowing the corresponding compression chamber to communicate with the low-pressure chamber 62, but the compression chamber corresponding to the second group of bypass holes 217 is not connected to the low-pressure chamber 62, and the scroll compressor 1 operates in the first partial load state. Figure 6 and Figure 7 As shown, when the first modulation ring 41 and the second modulation ring 42 both move away from the upper surface 211a of the end plate 211, the first group of bypass holes 216 and the second group of bypass holes 217 are both directly exposed to the low-pressure chamber 62, thereby allowing the corresponding compression chambers to communicate with the low-pressure chamber 62, and the scroll compressor 1 operates in a second partial load state.

[0042] In this embodiment, if Figure 8 As best shown, the first group of bypass holes 216 includes two groups of bypass holes 216a, 216b arranged in a circumferential direction and spaced apart from each other, wherein each group of bypass holes includes six bypass holes; the second group of bypass holes 217 includes two groups of bypass holes 217a, 217b arranged in a circumferential direction and spaced apart from each other, wherein each group of bypass holes includes six bypass holes. In other embodiments, any suitable number or group of bypass holes may be provided as desired, for example, the group of bypass holes (such as the first group of bypass holes 216) described herein may also include the case of only one bypass hole. In other embodiments, the bypass holes may also be configured to connect the corresponding compression chamber to the fluid of other low-pressure regions other than the low-pressure chamber 62.

[0043] Combine the following Figures 9 to 12 The structures and arrangements of the first modulation ring 41 and the second modulation ring 42 are described in detail. Fig. 9 shows a perspective view of the first modulation ring 41, Fig.10 shows a side view of the first modulation ring 41, Fig.11 Shown along Fig.10 A cross-sectional view taken along line DD in FIG. Fig.12 A cross-sectional view taken along an axial section through a diameter of the second modulation ring 42 is shown.

[0044] like Figures 9 to 11As shown, the first modulation ring 41 includes a first axial section 411 and a second axial section 412 extending in the axial direction. The first modulation ring 41 also includes a radial section 413 connecting the first axial section 411 and the second axial section 412. The radial section 413 extends from one axial end (i.e., Figures 9 to 11 The lower end of the first axial section 411 shown in FIG. 4 extends radially to the adjacent axial end of the second axial section 412 (i.e. Figures 9 to 11 The first modulation ring 41 is formed by a plurality of radial segments 413 and a plurality of radial segments 414. The first modulation ring 41 is formed by a plurality of radial segments 415 and a plurality of radial segments 416. The first modulation ring 41 is formed by a plurality of radial segments 417 and a plurality of radial segments 418. The first modulation ring 41 is formed by a plurality of radial segments 419 and a plurality of radial segments 411. The first modulation ring 41 is formed by a plurality of radial segments 410 and a plurality of radial segments 4116. The first modulation ring 41 is formed by a plurality of radial segments 411 and a plurality of radial segments 412. The first modulation ring 41 is formed by a plurality of radial segments 413 and a plurality of radial segments 414. The first modulation ring 41 is formed by a plurality of radial segments 415 and a plurality of radial segments 416. The first modulation ring 41 is formed by a plurality of radial segments 417 and a plurality of radial segments 418. The first modulation ring 41 is formed by a plurality of radial segments 419 and a plurality of radial segments 410 are formed by a plurality of radial segments 411 and a plurality of radial segments 412. The first modulation ring 41 is formed by a plurality of radial segments 413 and a plurality of radial segments 414. The first modulation ring 41 is formed by a plurality of radial segments 414 and a plurality of radial segments 416. The first modulation ring 41 is formed by a plurality of radial segments 417 and a plurality of radial segments 418.

[0045] like Fig.12 As shown, the second modulation ring 42 includes an axial section 421 extending in the axial direction and an axial end portion (ie, Fig.12 The radial section 422 is a radial section 422 extending radially inwardly from the upper end of the axial section 421 shown in the figure. The upper surface 422a of the radial section 422 is configured as a third fluid action surface, and the lower surface 422b of the radial section 422 is configured as a fourth fluid action surface. In this embodiment, the area A3 of the third fluid action surface is greater than the area A4 of the fourth fluid action surface, and the area A4 of the fourth fluid action surface is greater than the area A1 of the first fluid action surface of the first modulation ring 41.

[0046] Combination Figures 9 to 12 and Figures 3 to 7As shown, in the assembled state, the first modulation ring 41 and the second modulation ring 42 are arranged above the end plate 211 of the fixed scroll component 21 and around the hub 213, and the first modulation ring 41 is arranged on the radially outer side of the second modulation ring 42 and is superimposed on the second modulation ring 42, so that the second fluid action surface of the first modulation ring 41 is opposite to the third fluid action surface of the second modulation ring 42. A pressurizing chamber 63 is defined at the first fluid action surface. In the present embodiment, the pressurizing chamber 63 is defined between the upper surface 411a of the first axial section 411 of the first modulation ring 41 and the mounting insert 13, and the pressurizing chamber 63 is arranged to communicate with the exhaust port 211c. A first modulation chamber 71 is defined between the second fluid action surface and the third fluid action surface. A second modulation chamber 72 is defined at the fourth fluid action surface. In the present embodiment, the second modulation ring 42 is arranged around the step 215 of the hub 213, thereby defining a second modulation chamber 72 between the fourth fluid action surface and the upper surface of the step 215.

[0047] like Figures 9 to 11 As shown, the first modulation ring 41 is provided with a first fluid channel 416 and a second fluid channel 417 inside. The first fluid channel 416 extends from the outer peripheral surface 412c of the second axial segment 412 to the inner peripheral surface 412d of the second axial segment 412, thereby extending to the first modulation chamber 71. The second fluid channel 417 extends from the outer peripheral surface 412c of the second axial segment 412 to the upper surface 411a of the first axial segment 411, thereby extending to the pressurizing chamber 63.

[0048] Combination Figure 5 , Figure 7 and Fig.11 As shown, the first fluid introduction device 51 is installed at the outer peripheral surface 412c of the second axial section 412 of the first modulation ring 41. Fig. 9 As shown, the first modulation ring 41 may further include a mounting hole 418 for mounting the first fluid introduction device 51. In the present embodiment, the first fluid introduction device 51 is configured to selectively connect the first fluid channel 416 with the second fluid channel 417 or with the low-pressure chamber 62. When the first fluid channel 416 is connected with the second fluid channel 417, the first high-pressure fluid from the pressurized chamber 63 is introduced into the first modulation chamber 71; when the first fluid channel 416 is connected with the low-pressure chamber 62, the first low-pressure fluid from the low-pressure chamber 62 is introduced into the first modulation chamber 71.

[0049] like Figure 7As best shown, the second fluid introduction device 52 is disposed at the outer peripheral surface 21c of the fixed scroll component 21. A third fluid channel 218 and a fourth fluid channel 219 are disposed in the end plate 211 of the fixed scroll component 21. The third fluid channel 218 extends from the outer peripheral surface 21c of the fixed scroll component 21 to the upper surface of the step portion 215, thereby extending to the second modulation chamber 72. The fourth fluid channel 219 extends from the outer peripheral surface 21c of the fixed scroll component 21 to the exhaust port 211c. In the present embodiment, the second fluid introduction device 52 is configured to selectively connect the third fluid channel 218 to the fourth fluid channel 219 or to the low-pressure chamber 62. When the third fluid channel 218 is connected to the fourth fluid channel 219, the exhaust gas from the exhaust port 211c is introduced into the second modulation chamber 72 as the second high-pressure fluid; when the third fluid channel 218 is connected to the low-pressure chamber 62, the second low-pressure fluid from the low-pressure chamber 62 is introduced into the second modulation chamber 72.

[0050] A seal may be provided between the pressurized chamber 63 and the low-pressure chamber 62, between the pressurized chamber 63 and the first modulation chamber 71, between the first modulation chamber 71 and the second modulation chamber 72, between the first modulation chamber 71 and the first group of bypass holes 216, and / or between the second modulation chamber 72 and the second group of bypass holes 217 to prevent fluid leakage between the chambers. Figure 4 As best shown, a seal 91 is provided between the first axial section 411 of the first modulation ring 41 and the mounting insert 13, a seal 92 is provided between the first axial section 411 of the first modulation ring 41 and the body portion 214 of the hub 213 of the fixed scroll component 21, a seal 93 is provided between the second modulation ring 42 and the body portion 214 of the hub 213 of the fixed scroll component 21, a seal 94 is provided between the second modulation ring 42 and the second axial section 412 of the first modulation ring 41, and a seal 95 is provided between the second modulation ring 42 and the step portion 215 of the hub 213 of the fixed scroll component 21. The seals 91 to 95 can be configured as O-rings or other forms of seals. Grooves for receiving seals can be provided on the first modulation ring 41, the second modulation ring 42, the fixed scroll component 21 and / or the mounting insert 13. The compact arrangement of the first modulation ring 41 and the second modulation ring 42 relative to the fixed scroll component 21 in the present disclosure allows for convenient and reliable arrangement of the seal, and can effectively reduce the volume of the seal.

[0051] By introducing fluids of different pressures into the first modulation chamber 71 and the second modulation chamber 72 respectively through the first fluid introduction device 51 and the second fluid introduction device 52, the fluid force on the first modulation ring 41 and the second modulation ring 42 in the axial direction can be adjusted, thereby controlling the movement of the first modulation ring 41 and the second modulation ring 42 in the axial direction to cover the corresponding bypass holes 216 and 217 or expose the corresponding bypass holes 216 and 217, thereby adjusting the displacement of the scroll compressor 1. In this embodiment, the first fluid introduction device 51 and the second fluid introduction device 52 are each configured to include a solenoid valve.

[0052] The following specifically describes the principle of the first fluid introduction device 51 and the second fluid introduction device 52 controlling the movement of the first modulation ring 41 and the second modulation ring 42. It should be noted that since the fluid force on the first modulation ring 41 and the second modulation ring 42 is much greater than the gravity of the first modulation ring 41 and the second modulation ring 42 and the friction force applied to the first modulation ring 41 and the second modulation ring 42 by the seals 91 to 95, the following description ignores the gravity and friction force on the first modulation ring 41 and the second modulation ring 42. In addition, since the area of ​​the first modulation ring 41 and the second modulation ring 42 (i.e., the area of ​​the first group of bypass holes 216 and the second group of bypass holes 217) that the fluid pressure acts on is very small, the fluid force on the first modulation ring 41 and the second modulation ring 42 at the first group of bypass holes 216 and the second group of bypass holes 217 is much smaller than the fluid force on the first modulation ring 41 and the second modulation ring 42 at the pressurizing chamber 63, the first modulation chamber 71 and the second modulation chamber 72. Therefore, the following description also ignores the fluid force on the first modulation ring 41 and the second modulation ring 42 at the bypass holes. In other words, it can be approximately considered that the movement of the first modulation ring 41 and the second modulation ring 42 in the axial direction is only controlled by the fluid force on them at the pressurizing chamber 63, the first modulation chamber 71 and the second modulation chamber 72.

[0053] like Figure 3 As shown, when the solenoid valve of the first fluid introduction device 51 is energized and the solenoid valve of the second fluid introduction device 52 is energized, the first fluid introduction device 51 connects the first fluid channel 416 in the first modulation ring 41 with the low-pressure chamber 62, so that the first low-pressure fluid from the low-pressure chamber 62 is introduced into the first modulation chamber 71; the second fluid introduction device 52 connects the third fluid channel 218 in the fixed vortex component 21 with the low-pressure chamber 62, so that the second low-pressure fluid from the low-pressure chamber 62 is introduced into the second modulation chamber 72.

[0054] At this time, the fluid pressure in the pressurized chamber 63 is equal to the exhaust pressure P at the exhaust port 211c. H, the fluid in the pressurized chamber 63 exerts a force F1=P on the first modulation ring 41 at the first fluid action surface, which is directed toward the second fluid action surface (i.e., axially downward). H ×A1. The pressure of the first low-pressure fluid in the first modulation chamber 71 is equal to the fluid pressure P in the low-pressure chamber 62. L , the fluid in the first modulation chamber 71 exerts a force F2=P on the first modulation ring 41 at the second fluid action surface, which is directed toward the first fluid action surface (i.e., axially upward). L ×A2. Due to P H Much larger than P L , therefore F1>F2, the first modulation ring 41 is subjected to the resultant axial downward fluid force, and the first modulation ring 41 abuts against the end plate 211 of the fixed scroll component 21 and covers the first group of bypass holes 216 .

[0055] At the same time, the first low-pressure fluid in the first modulation chamber 71 exerts a force F3=P directed toward the fourth fluid action surface (ie, axially downward) on the second modulation ring 41 at the third fluid action surface. L ×A3. The pressure of the second low-pressure fluid in the second modulation chamber 72 is equal to the fluid pressure P in the low-pressure chamber 62. L , the fluid in the second modulation chamber 72 exerts a force F4=P on the second modulation ring 42 at the fourth fluid action surface, which is directed toward the third fluid action surface (i.e., axially upward). L ×A4. Since the area A3 of the third fluid action surface is greater than the area A4 of the fourth fluid action surface, F3>F4, the second modulation ring 42 is subjected to the axial downward fluid action force, and the second modulation ring 42 abuts against the end plate 211 of the fixed scroll component 21 and covers the second group of bypass holes 217.

[0056] Therefore, the first group of bypass holes 216 and the second group of bypass holes 217 are both covered, so that the corresponding compression chambers are not connected to the low-pressure chamber 62, and the scroll compressor 1 operates at a full load state.

[0057] like Figure 4 and Figure 5 As shown, when the solenoid valve of the first fluid introduction device 51 is de-energized and the solenoid valve of the second fluid introduction device 52 is energized, the first fluid introduction device 51 connects the first fluid channel 416 in the first modulation ring 41 with the second fluid channel 417, so that the first high-pressure fluid from the pressurized chamber 63 is introduced into the first modulation chamber 71; the second fluid introduction device 52 connects the third fluid channel 218 in the fixed vortex component 21 with the low-pressure chamber 62, so that the second low-pressure fluid from the low-pressure chamber 62 is introduced into the second modulation chamber 72.

[0058] At this time, the fluid pressure in the pressurized chamber 63 is equal to the exhaust pressure P at the exhaust port 211c. H, the fluid in the pressurized chamber 63 exerts a force F1=P on the first modulation ring 41 at the first fluid action surface, which is directed toward the second fluid action surface (i.e., axially downward). H ×A1. The pressure of the first high-pressure fluid in the first modulation chamber 71 is equal to the fluid pressure P in the pressurizing chamber 63. H , the fluid in the first modulation chamber 71 exerts a force F2=P on the first modulation ring 41 at the second fluid action surface, which is directed toward the first fluid action surface (i.e., axially upward). H ×A2. Since the area A2 of the second fluid action surface is larger than the area A1 of the first fluid action surface, F2>F1, the first modulation ring 41 is subjected to the resultant axial upward fluid action force, and the first modulation ring 41 moves axially upward away from the end plate 211 of the fixed scroll component 21 and exposes the first group of bypass holes 216.

[0059] At the same time, the first high pressure fluid in the first modulation chamber 71 exerts a force F3=P directed toward the fourth fluid action surface (ie, axially downward) on the second modulation ring 41 at the third fluid action surface. H ×A3. The pressure of the second low-pressure fluid in the second modulation chamber 72 is equal to the fluid pressure P in the low-pressure chamber 62. L , the fluid in the second modulation chamber 72 exerts a force F4=P on the second modulation ring 42 at the fourth fluid action surface, which is directed toward the third fluid action surface (i.e., axially upward). L ×A4. H Much larger than P L And the area A3 of the third fluid action surface is greater than the area A4 of the fourth fluid action surface, so F3>F4, and the second modulation ring 42 is subjected to the axial downward fluid action force, and the second modulation ring 42 abuts against the end plate 211 of the fixed scroll component 21 and covers the second group of bypass holes 217.

[0060] Therefore, the first group of bypass holes 216 is exposed and the second group of bypass holes 217 is covered, the compression chambers corresponding to the first group of bypass holes 216 are connected to the low-pressure chamber 62, and the compression chambers corresponding to the second group of bypass holes 217 are not connected to the low-pressure chamber 62, and the scroll compressor 1 operates in the first partial load state. The displacement of the scroll compressor 1 in the first partial load state can be configured to be, for example, about 2 / 3 of the displacement in the full load state.

[0061] like Figure 6 and Figure 7As shown, when the solenoid valve of the first fluid introduction device 51 is energized and the solenoid valve of the second fluid introduction device 52 is de-energized, the first fluid introduction device 51 makes the first fluid channel 416 in the first modulation ring 41 communicate with the low-pressure chamber 62, so that the first low-pressure fluid from the low-pressure chamber 62 is introduced into the first modulation chamber 71; the second fluid introduction device 52 makes the third fluid channel 218 in the fixed scroll component 21 communicate with the fourth fluid channel 219, so that the exhaust gas (pressure P) from the exhaust port 211c is discharged. H ) is introduced into the second modulation chamber 72 as the second high-pressure fluid. Considering the first modulation ring 41 and the second modulation ring 42 as a whole, the fluid in the pressurized chamber 63 exerts a force F1=P directed to the fourth fluid action surface (i.e., axially downward) on the first fluid action surface of the first modulation ring 41 and the second modulation ring 42 as a whole. H ×A1, the second high pressure fluid in the second modulation chamber 72 exerts a force F4=P on the first fluid action surface (i.e., axially upward) on the first modulation ring 41 and the second modulation ring 42 as a whole at the fourth fluid action surface H ×A4. Since the area A4 of the fourth fluid action surface is larger than the area A1 of the first fluid action surface, F4>F1, the first modulation ring 41 and the second modulation ring 42 are subjected to the combined axial upward fluid force, and the first modulation ring 41 and the second modulation ring 42 are both axially moved upward away from the end plate 211 of the fixed scroll component 21, so that the first group of bypass holes 216 and the second group of bypass holes 217 are exposed.

[0062] At this time, the compression chamber corresponding to the first group of bypass holes 216 is connected to the low-pressure chamber 62, and the compression chamber corresponding to the second group of bypass holes 217 is connected to the low-pressure chamber 62, and the scroll compressor 1 operates in the second partial load state. The displacement of the scroll compressor 1 in the second partial load state is smaller than the displacement in the first partial load state. For example, the displacement of the scroll compressor 1 in the second partial load state can be configured to be about 1 / 2 or less of the displacement in the full load state.

[0063] Therefore, the scroll compressor 1 according to the above embodiment realizes at least three-stage displacement regulation of the scroll compressor with a simple structure, and when the system including the scroll compressor 1 is running under light load, the scroll compressor 1 can better match the cooling capacity and improve efficiency.

[0064] In the above embodiment, the pressurizing chamber 63 is configured to communicate with the exhaust port 211c of the compression mechanism 20, and the first fluid introduction device 51 and the second fluid introduction device 52 are configured to introduce the exhaust gas from the exhaust port 211c of the compression mechanism 20 as the first high-pressure fluid and / or the second high-pressure fluid into the first modulation chamber 71 and / or the second modulation chamber 72, and introduce the fluid from the low-pressure chamber 62 in the housing 10 of the scroll compressor 1 as the first low-pressure fluid and / or the second low-pressure fluid into the first modulation chamber 71 and / or the second modulation chamber 72, but the present disclosure is not limited thereto. In alternative embodiments, fluids from other positions can be introduced into the pressurizing chamber 63, and fluids from other positions can also be introduced into the first modulation chamber 71 or the second modulation chamber 72 as high-pressure fluids or low-pressure fluids, respectively, as long as it is ensured that the first modulation ring 41 and the second modulation ring 42 can be moved in a desired manner to cover or expose the first group of bypass holes 216 and / or the second group of bypass holes 217. For example, fluid can be drawn from a medium-pressure compression chamber position of the scroll compressor where the pressure is suitable. The pressure of the first high-pressure fluid and the second high-pressure fluid can be equal to or greater than the fluid pressure in the pressurizing chamber 63, and the pressure of the first low-pressure fluid and the second low-pressure fluid can be less than the fluid pressure in the pressurizing chamber and less than the pressure of the first high-pressure fluid and the second high-pressure fluid.

[0065] In the above embodiment, the scroll compressor 1 is provided with two groups of bypass holes and two corresponding modulation rings, so that three-stage displacement adjustment (i.e., full load state, first load state, and second load state) can be achieved, but the present disclosure is not limited thereto. In alternative embodiments, more groups of bypass holes and corresponding more modulation rings can be provided to achieve more than three-stage displacement adjustment. Based on the principle of the present disclosure, n groups of bypass holes and corresponding n modulation rings can be provided to achieve n+1-stage displacement adjustment. For example, on the basis of the above embodiment, a third group of bypass holes can be provided radially inside the second group of bypass holes 217, and a third modulation ring with a structure similar to the second modulation ring 42 is provided below and radially inside the second modulation ring 42, and is used to cover or expose the third group of bypass holes, so as to define a third modulation chamber between the second modulation ring 42 and the third modulation ring, and the first modulation chamber, the second modulation chamber, and the third modulation chamber are respectively introduced into the fluid introduction device. The fluid of the required pressure is controlled to move the first modulation ring, the second modulation ring, and the third modulation ring to cover or expose the corresponding bypass holes, thereby achieving four-stage displacement adjustment.

[0066] In the above embodiment, the scroll compressor 1 is provided with two fluid introduction devices. It should be understood that the two fluid introduction devices can be integrated into a single fluid introduction device. In other embodiments, the scroll compressor 1 may also include more than two fluid introduction devices. In addition, the fluid introduction device may include any other suitable mechanism other than the solenoid valve, and in the case where the fluid introduction device includes a solenoid valve, the fluid introduction setting corresponding to the power-on / power-off state of the solenoid valve may be different from that described above, as long as the modulation ring can be moved as desired to cover or expose the corresponding bypass hole.

[0067] It should also be understood that, although the area relationship between the fluid action surfaces of the first modulation ring 41 and the second modulation ring 42 described in the above embodiment is conducive to achieving the desired movement of the first modulation ring 41 and the second modulation ring 42 with a simple structure, the area relationship between the fluid action surfaces described above is not necessary, because the fluid action force on the first modulation ring 41 and the second modulation ring 42 depends not only on the area of ​​the corresponding fluid action surface, but also on the pressure of the fluid acting on the fluid action surface.

[0068] Here, exemplary embodiments of the scroll compressor according to the present disclosure have been described in detail, but it should be understood that the present disclosure is not limited to the specific embodiments described and shown in detail above. The various embodiments according to the present disclosure can be used alone or in combination. Without departing from the spirit and scope of the present disclosure, those skilled in the art can make various modifications and variations to the present disclosure. All these modifications and variations fall within the scope of the present disclosure. Moreover, all components described herein can be replaced by other technically equivalent components.

Claims

1. A scroll compressor, comprising: case; as well as A compression mechanism, the compression mechanism comprising a fixed scroll component and a movable scroll component, the fixed scroll component and the movable scroll component cooperate with each other to form a series of compression chambers, the fixed scroll component is provided with a plurality of groups of bypass holes extending from the outer surface of the fixed scroll component to the compression chamber, the plurality of groups of bypass holes comprising a first group of bypass holes and a second group of bypass holes, the second group of bypass holes being located radially inward of the first group of bypass holes, Characterized in that the scroll compressor also includes: a plurality of modulation rings, each of the plurality of modulation rings being configured to cover a corresponding group of bypass holes in the plurality of groups of bypass holes, the plurality of modulation rings comprising a first modulation ring and a second modulation ring, the second modulation ring being arranged radially inward of the first modulation ring, wherein the first modulation ring has a first fluid action surface and a second fluid action surface opposite to each other, the second modulation ring has a third fluid action surface and a fourth fluid action surface opposite to each other, the second fluid action surface being arranged opposite to the third fluid action surface, a pressurizing chamber being defined at the first fluid action surface, a first modulation chamber being defined between the second fluid action surface and the third fluid action surface, and a second modulation chamber being defined at the fourth fluid action surface; and a fluid introduction device, the fluid introduction device being configured to selectively introduce a first high-pressure fluid or a first low-pressure fluid into the first modulation chamber, and selectively introduce a second high-pressure fluid or a second low-pressure fluid into the second modulation chamber, wherein the pressure of the first high-pressure fluid and the pressure of the second high-pressure fluid are equal to or greater than the fluid pressure in the pressurizing chamber, and the pressure of the first low-pressure fluid and the pressure of the second low-pressure fluid are less than the fluid pressure in the pressurizing chamber and less than the pressure of the first high-pressure fluid and the pressure of the second high-pressure fluid, Wherein, the plurality of modulation rings are configured such that: When the first low-pressure fluid is introduced into the first modulation chamber and the second low-pressure fluid is introduced into the second modulation chamber, the first modulation ring covers the first group of bypass holes and the second modulation ring covers the second group of bypass holes, so that the scroll compressor is in a full load state; When the first high-pressure fluid is introduced into the first modulation chamber and the second low-pressure fluid is introduced into the second modulation chamber, the first modulation ring moves to expose the first group of bypass holes, and the second modulation ring covers the second group of bypass holes, so that the scroll compressor is in a first partial load state; When the second high-pressure fluid is introduced into the second modulation chamber, the first modulation ring moves to expose the first group of bypass holes, and the second modulation ring moves to expose the second group of bypass holes, so that the scroll compressor is in a second partial load state.

2. The scroll compressor according to claim 1, characterized in that: The area of ​​the second fluid action surface is larger than that of the first fluid action surface, and the area of ​​the fourth fluid action surface is larger than that of the first fluid action surface.

3. The scroll compressor according to claim 1 or 2, characterized in that: The pressurizing chamber is communicated with the exhaust port of the compression mechanism.

4. The scroll compressor according to claim 1 or 2, characterized in that: The fluid introduction device is configured to introduce the exhaust gas of the scroll compressor into the first modulation chamber as the first high-pressure fluid, and / or introduce the exhaust gas of the scroll compressor into the second modulation chamber as the second high-pressure fluid.

5. The scroll compressor according to claim 1 or 2, characterized in that: The fluid introduction device is configured to introduce the fluid in the low-pressure chamber in the housing into the first modulation chamber as the first low-pressure fluid, and / or introduce the fluid in the low-pressure chamber in the housing into the second modulation chamber as the second low-pressure fluid.

6. The scroll compressor according to claim 1 or 2, characterized in that: The first modulation ring includes a first fluid channel extending from the outer surface of the first modulation ring to the first modulation chamber and a second fluid channel extending from the outer surface of the first modulation ring to the pressurized chamber, and the fluid introduction device is configured to enable the first fluid channel to selectively connect with the second fluid channel or with the low-pressure chamber in the shell.

7. The scroll compressor according to claim 1 or 2, characterized in that: The fixed scroll component includes a third fluid channel extending from the outer surface of the fixed scroll component to the second modulation chamber and a fourth fluid channel extending from the outer surface of the fixed scroll component to the exhaust port of the compression mechanism, and the fluid introduction device is configured to enable the third fluid channel to selectively connect with the fourth fluid channel or with the low-pressure chamber in the shell.

8. The scroll compressor according to claim 1 or 2, characterized in that: The first set of bypass holes communicates with a low pressure cavity in the housing when the scroll compressor is in the first partial load state, and the second set of bypass holes communicates with the low pressure cavity in the housing when the scroll compressor is in the second partial load state.

9. The scroll compressor according to claim 1 or 2, characterized in that: The fluid introduction device comprises a first fluid introduction device for introducing fluid into the first modulation chamber and a second fluid introduction device for introducing fluid into the second modulation chamber.

10. The scroll compressor according to claim 1 or 2, characterized in that: The fluid introduction device includes a solenoid valve.

11. The scroll compressor according to claim 1 or 2, characterized in that: A seal is provided between the first modulation chamber and the pressurizing chamber, between the first modulation chamber and the second modulation chamber, between the first modulation chamber and the first group of bypass holes, and / or between the second modulation chamber and the second group of bypass holes.

12. The scroll compressor according to claim 1 or 2, characterized in that: The fixed scroll component includes an end plate and a hub portion extending from the end plate, the plurality of groups of bypass holes are disposed on the end plate, and the first modulation ring and the second modulation ring are positioned around the hub portion and at a radially outer side of the hub portion.

13. The scroll compressor according to claim 1 or 2, characterized in that: The first modulation ring is configured in an annular stepped shape so as to receive the second modulation ring radially inside the first modulation ring.

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