Scroll compressor

Abstract

A scroll compressor is provided. The scroll compressor includes a first scroll, a second scroll, and an regulating assembly. The regulating assembly is adapted to selectively cover and open a regulating passage and has opposing first and second fluid action surfaces. The first fluid action surface is subjected to a first fluid pressure applied by a fluid along a first direction, and the second fluid action surface is subjected to a second fluid pressure applied by a fluid along a second direction. The regulating assembly is configured to automatically move up and down in the axial direction depending on different operating states of the system, subjecting it to different first and second fluid pressures. When the first fluid pressure is greater than the second fluid pressure, the regulating assembly can cover the regulating passage to close it; when the first fluid pressure is less than the second fluid pressure, the regulating assembly can move away from the regulating passage to open it. The scroll compressor can automatically switch between full-load and partial-load operating states.

Description

Technical Field

[0001] This invention relates to the field of compressors, and particularly to a scroll compressor with improvements in variable capacity. Background Technology

[0002] The content in this section only provides background information related to this invention and does not necessarily constitute prior art.

[0003] In existing scroll compressors that switch between two load states (full load and partial load), a floating seal ring assembly and a corresponding back pressure chamber are required, along with an adjustment chamber. This results in a relatively large angle for the pressure tap in the back pressure chamber (i.e., the pressure tap is positioned relatively close to the radially inward side). This connects the pressure tap to the higher-pressure compression chamber, causing significant stress on the tips of the stationary and moving scrolls, as well as the end plate in contact with these tips, leading to wear. Furthermore, in related technologies, besides the floating seal ring assembly and the corresponding back pressure chamber, an electromagnetic regulating valve is also required to control the fluid flowing into the adjustment chamber equipped with a U-shaped seal. This makes the scroll compressor structure relatively complex and costly. Furthermore, in related technologies, because the angle of the pressure tapping hole in the back pressure chamber is relatively large (i.e., the position of the pressure tapping hole is relatively close to the radial inner side), the pressure tapping hole is connected to the compression chamber with higher pressure, which causes the fixed scroll and the moving scroll to be subjected to greater force at their tips. When the scroll compressor switches between two load states (full load and partial load) in the full load operation state, it will generate greater sealing redundancy, which will increase mechanical wear and power consumption. Therefore, compared with the fixed speed machine, the performance is reduced.

[0004] Therefore, improvements are needed to the scroll compressors in the relevant technologies to solve or mitigate at least some of the problems existing in the prior art. Summary of the Invention

[0005] To address the aforementioned problems, one objective of this invention is to provide a scroll compressor capable of automatically switching between full-load and partial-load operating states.

[0006] Another object of the present invention is to provide a scroll compressor that is low in cost, easy to assemble, and highly reliable.

[0007] This invention provides a scroll compressor. The scroll compressor includes:

[0008] A first vortex, the first vortex including a first end plate and a first vortex extending from the first end plate; and

[0009] The second vortex includes a second end plate and a second vortex extending from the second end plate.

[0010] The first vortex and the second vortex mesh with each other to define a plurality of compression chambers between the first vortex and the second vortex. The compression chambers include an intake pressure compression chamber communicating with the intake pressure region, an exhaust pressure compression chamber communicating with the exhaust pressure region, and an intermediate compression chamber located between the intake pressure compression chamber and the exhaust pressure compression chamber.

[0011] The second end plate is provided with an adjustment channel extending from the upper surface of the second end plate to the compression chamber, and

[0012] The scroll compressor further includes an adjustment assembly adapted to selectively cover and open the adjustment channel and having opposing first and second fluid action surfaces. The first fluid action surface is subjected to a first fluid pressure applied by a fluid along a first direction, and the second fluid action surface is subjected to a second fluid pressure applied by a fluid along a second direction.

[0013] The regulating component is configured to be subjected to different first and second fluid pressures according to different operating states of the system, so that the regulating component can automatically move up and down in the axial direction. When the first fluid pressure is greater than the second fluid pressure, the regulating component can cover the regulating channel to close the regulating channel. When the first fluid pressure is less than the second fluid pressure, the regulating component can move away from the regulating channel to open the regulating channel.

[0014] In one embodiment, the first fluid action surface includes a first pressure-bearing region capable of contacting fluid discharged from the discharge pressure compression chamber and thus receiving force, and the second fluid action surface includes a third pressure-bearing region capable of contacting fluid in the intermediate compression chamber via a pressure tap provided at the second end plate and thus receiving force.

[0015] In one embodiment, the first fluid action surface further includes a second pressure-bearing region capable of contacting the fluid in the suction pressure region and thus bearing force, and the second fluid action surface further includes a fourth pressure-bearing region capable of contacting the fluid in the suction pressure region and thus bearing force.

[0016] In one embodiment, the second vortex includes a hub portion, the hub portion including a first hub portion and a second hub portion defining an annular chamber, the first hub portion being located radially inside the second hub portion.

[0017] In one embodiment, the regulating assembly is sealed to the hub of the second vortex to define a regulating cavity that is in fluid communication with the intermediate compression chamber via the pressure tap, and the third pressure-bearing region is the area of ​​the second fluid-acting surface exposed to the regulating cavity.

[0018] In one embodiment, the adjustment assembly includes a first seal that engages with the first hub of the second vortex and a second seal that engages with the second hub of the second vortex.

[0019] In one embodiment, the adjustment assembly includes a split body, the split body including a first component and a second component, and a first seal and a second seal of the adjustment assembly are embedded between the first component and the second component.

[0020] In one embodiment, the first component includes an upper annular section and a lower annular section, the upper annular section being adapted to seal with a corresponding component to isolate the discharge pressure region from the inhalation pressure region, and the lower annular section being adapted to cover the adjustment channel.

[0021] In one embodiment, the scroll compressor includes a muffler cover having an axial cylindrical portion defining a central hole, and the adjustment assembly is radially sealed to the axial cylindrical portion.

[0022] In one embodiment, the scroll compressor includes a muffler cover and an insert disposed at a central hole in the muffler cover, and the adjustment assembly is radially sealed to the insert.

[0023] In one embodiment, the scroll compressor includes a muffler cover, an insert, and a sealing ring. The insert is disposed at the central hole of the muffler cover, the sealing ring is disposed below the insert and provides axial sealing to the insert, and the sealing ring provides radial sealing to the adjusting assembly.

[0024] In one embodiment, the sealing ring has a horizontal section and a protrusion extending upward in an axial direction from the upper surface of the horizontal section, and the scroll compressor further includes an elastic member that abuts against the horizontal section to push the sealing ring toward the insert.

[0025] In one embodiment, the second vortex is axially fixed.

[0026] In one embodiment, at least one of the first and second volutes is provided with a tip seal at its tip.

[0027] In one embodiment, a back pressure cavity is provided on one side of the first vortex, and the first vortex is axially movable.

[0028] In one embodiment, different operating states of the system correspond to different ratios of the discharge fluid pressure to the suction fluid pressure of the scroll compressor.

[0029] The scroll compressor of the present invention automatically moves up and down axially by relying solely on the pressure changes on the two opposite fluid action surfaces of the regulating component, thereby covering or opening the regulating channel to automatically switch the scroll compressor between full-load and partial-load operating states, thus automatically adjusting the capacity of the scroll compressor according to the system operating state. Furthermore, the scroll compressor of the present invention does not have a floating sealing ring assembly for defining the back pressure chamber and does not have an electromagnetic regulating valve for controlling the pressure of the regulating chamber of the scroll compressor. Therefore, the scroll compressor of the present invention requires fewer parts, resulting in lower cost, easier assembly, and higher reliability. Attached Figure Description

[0030] The foregoing and other features and characteristics of the invention will become clearer from the following detailed description with reference to the accompanying drawings, which are by way of example only and are not necessarily drawn to scale. The same reference numerals are used in the drawings to indicate the same parts, in which:

[0031] Figure 1 This is a longitudinal sectional view showing a scroll compressor according to a first embodiment of the present invention;

[0032] Figure 2 This is a longitudinal sectional view showing a portion of the components of a scroll compressor according to a first embodiment of the present invention under full load, including components such as a second scroll, a first scroll, a silencer cover, an insert, and a sealing ring;

[0033] Figure 3 This is a longitudinal sectional view showing a portion of the components of a scroll compressor according to a first embodiment of the present invention under partial load, wherein components such as a second scroll, a first scroll, a muffler cover, an insert, and a sealing ring are shown.

[0034] Figure 4 This is a top view showing the second scroll of a scroll compressor according to a first embodiment of the present invention;

[0035] Figure 5 This is a perspective sectional view showing the adjustment assembly of a scroll compressor according to a first embodiment of the present invention;

[0036] Figure 6 This is a planar sectional view showing the regulating assembly of a scroll compressor according to a first embodiment of the present invention;

[0037] Figure 7 This is a schematic diagram showing the force analysis of the regulating component of a scroll compressor according to a first embodiment of the present invention;

[0038] Figure 8This is a bottom perspective view of the second scroll of a scroll compressor according to a first embodiment of the present invention, wherein a seal at the tip of the second scroll is shown;

[0039] Figure 9 This is a perspective view of the tip seal of the second scroll of a scroll compressor according to a first embodiment of the present invention;

[0040] Figure 10 This is a longitudinal sectional view showing a portion of the components of a scroll compressor according to a second embodiment of the present invention under full load, including components such as a second scroll, a first scroll, a silencer cover, and an insert.

[0041] Figure 11 This is a longitudinal sectional view showing a portion of the components of a scroll compressor according to a second embodiment of the present invention under partial load, wherein components such as the second scroll, the first scroll, the silencer cover, and the insert are shown;

[0042] Figure 12 This is a longitudinal sectional view showing a portion of the components of a scroll compressor according to a third embodiment of the present invention under full load, including components such as the second scroll, the first scroll, and the silencer cover; and

[0043] Figure 13 This is a longitudinal sectional view showing a portion of the components of a scroll compressor according to a third embodiment of the present invention under partial load, including components such as a second scroll, a first scroll, and a muffler cover. Detailed Implementation

[0044] Exemplary embodiments of the invention will now be described more fully with reference to the accompanying drawings.

[0045] This document provides exemplary embodiments to make the invention exhaustive and to convey the scope more fully to those skilled in the art. Numerous specific details, such as examples of specific components, apparatuses, and methods, are set forth to provide a thorough understanding of various embodiments of the invention, but these specific details should not be construed as limiting the scope of the invention. It will be apparent to those skilled in the art that exemplary embodiments may be implemented in many different forms, not limited to the specific details disclosed. In some exemplary embodiments, well-known processes, well-known apparatus structures, and well-known techniques are not described in detail.

[0046] In this document, if used, the directional terms such as “upper,” “lower,” “top,” and “bottom” are determined, for example, by the positions shown in the accompanying drawings. The use of these directional terms is intended for ease of description and not for limiting the invention.

[0047] The following will combine Figures 1 to 13A scroll compressor 1 according to an embodiment of the present invention will be described in detail. Figure 1 This is a longitudinal sectional view showing a scroll compressor 1 according to a first embodiment of the present invention. Figure 2 This is a longitudinal sectional view showing a portion of the components of a scroll compressor 1 according to a first embodiment of the present invention under full load, including components such as a second scroll 410, a first scroll 420, a silencer cover 12, an insert 13, and a sealing ring 14. Figure 3 This is a longitudinal sectional view showing a portion of the components of a scroll compressor 1 according to a first embodiment of the present invention under partial load, including components such as a second scroll 410, a first scroll 420, a silencer cover 12, an insert 13, and a sealing ring 14. Figure 4 This is a top view showing the second scroll 410 of the scroll compressor 1 according to a first embodiment of the present invention. Figure 5 This is a perspective sectional view showing the adjustment assembly 50 of the scroll compressor 1 according to a first embodiment of the present invention. Figure 6 This is a planar cross-sectional view showing the adjustment assembly 50 of the scroll compressor 1 according to a first embodiment of the present invention. Figure 7 This is a schematic diagram showing the force analysis of the regulating component 50 of the scroll compressor 1 according to the first embodiment of the present invention. Figure 8 This is a bottom perspective view of the second scroll 410 of the scroll compressor 1 according to the first embodiment of the present invention, wherein the tip seal 430 of the second scroll 410 is shown. Figure 9 This is a perspective view of the tip seal 430 of the second scroll 410 of the scroll compressor 1 according to the first embodiment of the present invention. Figure 10 This is a longitudinal sectional view showing a portion of the components of a scroll compressor according to a second embodiment of the present invention under full load, including components such as the second scroll, the first scroll, the silencer cover 12', and the insert 13'. Figure 11 This is a longitudinal sectional view showing a portion of the components of a scroll compressor according to a second embodiment of the present invention under partial load, including components such as the second scroll, the first scroll, the silencer cover 12', and the insert 13'. Figure 12 This is a longitudinal sectional view showing a portion of the components of a scroll compressor according to a third embodiment of the present invention under full load, including components such as the second scroll, the first scroll, and the silencer cover 12". Figure 13 This is a longitudinal sectional view showing a portion of the components of a scroll compressor according to a third embodiment of the present invention under partial load, including components such as the second scroll, the first scroll, and the silencer cover 12".

[0048] like Figure 1As shown, the scroll compressor 1 of the first embodiment of the present invention may include a housing assembly 10, a bearing housing assembly 20, a motor assembly 30, a compression mechanism 40, and an adjustment assembly 50, wherein the bearing housing assembly 20, the motor assembly 30, the compression mechanism 40, and the adjustment assembly 50 can be housed within the housing assembly 10.

[0049] like Figure 1 As shown, the housing assembly 10 can be composed of a generally cylindrical body, a top cover 11 disposed at one end of the body, and a bottom cover disposed at the other end of the body. A silencer cover 12 is provided between the top cover 11 and the body to divide the internal space of the housing assembly 10 into a low-pressure chamber 60 (or suction pressure region) and a high-pressure chamber 70 (or discharge pressure region). Specifically, the space between the silencer cover 12 and the top cover 11 constitutes the high-pressure chamber 70, while the space between the silencer cover 12, the body, and the bottom cover constitutes the low-pressure chamber 60.

[0050] In this embodiment, such as Figures 1 to 3 As shown, the scroll compressor 1 also includes an insert 13 and a sealing ring 14. The insert 13 is disposed at the central hole of the muffler cover 12, and the sealing ring 14 is disposed below the insert 13 and performs an axial seal with the insert 13. The sealing ring 14 also performs a radial seal with the adjusting assembly 50, so that the sealing ring 14 can isolate the low-pressure chamber 60 from the high-pressure chamber 70.

[0051] like Figures 1 to 3 As shown, the compression mechanism 40 may include a first scroll 420 and a second scroll 410. The first scroll 420 includes a first end plate 421 and a first scroll 422 extending from the first end plate 421. The second scroll 410 includes a second end plate 411 and a second scroll 412 extending from the second end plate 411. When the scroll compressor 1 is running, the motor assembly 30 drives the first scroll 420 to rotate relative to the second scroll 410, and the first scroll 422 and the second scroll 412 engage with each other to form a series of compression chambers therebetween, with the volume gradually decreasing from the radially outer side to the radially inner side. Working fluid enters the compression chambers from the radially outer side of the second scroll 410, is compressed, and is discharged from the exhaust passage 413 at approximately the center of the second end plate 411 of the second scroll 410. In some embodiments, the first scroll may be a moving scroll, and correspondingly, the first scroll may be a moving scroll; and the second scroll may be a stationary scroll, and correspondingly, the second scroll may be a stationary scroll.

[0052] Preferably, such as Figures 1 to 3As shown, the plurality of compression chambers may include an intake pressure compression chamber 81 communicating with the intake pressure region of the scroll compressor 1, an exhaust pressure compression chamber 84 communicating with the exhaust pressure region of the scroll compressor 1 (e.g., via exhaust passage 413), and an intermediate compression chamber located between the intake pressure compression chamber 81 and the exhaust pressure compression chamber 84. The intermediate compression chamber operates at an intermediate pressure between the intake pressure and the exhaust pressure, such as... Figures 1 to 3 As shown, the intermediate compression chamber may include, for example, a first intermediate compression chamber 82 and a second intermediate compression chamber 83. The second intermediate compression chamber 83 may be located radially inside the first intermediate compression chamber 82 and has a higher pressure than the first intermediate compression chamber 82.

[0053] Figure 4 A top view of the second vortex 410 is shown. In this invention, the second vortex 410 can be axially fixed, meaning that the second vortex 410 cannot move up and down in the axial direction. From Figure 4 It can be seen that the second end plate 411 of the second scroll compressor 410 is provided with a plurality of adjustment channels 414. The adjustment channels 414 extend from the upper surface of the second end plate 411 to the lower surface of the second end plate 411, thereby extending to the compression chamber. The adjustment channels 414 can be used to make the corresponding compression chamber fluidly connected to the low-pressure chamber 60 in the housing assembly 10, thereby changing the displacement of the scroll compressor 1. When the adjustment assembly 50 abuts against the upper surface of the second end plate 411 and covers the adjustment channels 414, thereby preventing the corresponding compression chamber from fluidly connecting to the low-pressure chamber 60, the scroll compressor 1 operates in a full-load state. When the adjustment assembly 50 moves away from the upper surface of the second end plate 411, the adjustment channels 414 are directly exposed to the low-pressure chamber 60, thereby allowing the corresponding compression chamber to fluidly connect to the low-pressure chamber 60, and the scroll compressor 1 operates in a partial-load state. Thus, the variable displacement of the scroll compressor 1 is realized. In this embodiment, as Figure 4 As shown, the second vortex 410 includes two sets of adjustment channels 414 arranged circumferentially and spaced apart from each other, wherein each set of adjustment channels contains 5 adjustment channels. In other embodiments, any suitable number or set of adjustment channels can be provided as needed.

[0054] like Figures 1 to 3 As shown, the second vortex 410 may include a hub, which includes a first hub 415 and a second hub 416 defining an annular chamber. The first hub 415 is located radially inside the second hub 416. Both the first hub 415 and the second hub 416 have a generally cylindrical shape. The annular chamber defined by the first hub 415 is in fluid communication with the discharge pressure compression chamber 84 via an exhaust passage 413 and with the high-pressure chamber 70 via an exhaust passage 133 in the insert 13, which will be described in detail below.

[0055] The following is combined Figure 5 and Figure 6 The structure of the adjustment component 50 is described in detail. Figure 5 A perspective sectional view of the adjustment component 50 is shown, and Figure 6 A planar sectional view of the adjustment component 50 is shown.

[0056] like Figure 5 and Figure 6 As shown, the adjustment assembly 50 includes a split body, which includes a first component 51 and a second component 52. The adjustment assembly 50 also includes a first seal 53 that seals against a first hub 415 of the second scroll 410 and a second seal 54 that seals against a second hub 416 of the second scroll 410, and the first seal 53 and the second seal 54 are fitted between the first component 51 and the second component 52. Specifically, the first component 51 includes an upper annular segment 511 extending upward in the axial direction and a lower annular segment 512 extending downward in the axial direction. The upper annular segment 511 is adapted to seal against a corresponding component (e.g., the horizontal segment 141 of the sealing ring 14, the annular segment 134' of the insert 13', or the axial cylindrical portion 121" of the muffler 12") to isolate the discharge pressure region from the suction pressure region, and the lower annular segment 512 is adapted to cover the adjustment channel 414. The first member 51 further includes an intermediate section 513 connecting the upper annular section 511 and the lower annular section 512. The intermediate section 513 extends radially outward from the side of the lower end of the upper annular section 511 to the side of the upper end of the lower annular section 512. The intermediate section 513 is provided with an annular opening 5131. The first member 51 also includes a stepped portion 514 protruding radially inward from the lower part of the upper annular section 511. An inner flange 5111 may be provided around the inner peripheral surface 511a of the upper annular section 511, protruding radially inward from approximately the center of the inner peripheral surface 511a. The second member 52 may include a horizontal section 521 extending in the radial direction and an annular protrusion 522 extending axially upward from the horizontal section 521. The diameter of the upper segment 5221 of the annular protrusion 522 is larger than the diameter of the annular opening 5131, and the diameter of the lower segment 5222 of the annular protrusion 522 is slightly smaller than or equal to the diameter of the annular opening 5131. When the annular protrusion 522 is engaged in the annular opening 5131 of the first member 51, the lower surface of the upper segment 5221 of the annular protrusion 522 abuts against the upper surface of the middle segment 513 of the first member 51. A certain gap is defined between the lower surface of the middle segment 513 of the first member 51 and the upper surface of the horizontal segment 521 of the second member 52, and the first seal 53 and the second seal 54 are embedded in the gap. The lower surface of the middle segment 513 is also provided with a groove 5132, which is used to accommodate the second hub 416 of the second vortex 410.

[0057] In this document, the adjusting assembly 50 is adapted to selectively cover and open the adjusting channel 414 and has opposing first and second fluid action surfaces. The first fluid action surface is subjected to a first fluid pressure applied by a fluid along a first direction, and the second fluid action surface is subjected to a second fluid pressure applied by a fluid along a second direction. All upward-facing surfaces of the adjusting assembly 50 (i.e., surfaces facing the muffler cover 12) are referred to as the first fluid action surfaces of the adjusting assembly 50, and the fluid pressure acting on the first fluid action surfaces will cause the adjusting assembly 50 to experience an axially downward force. All downward-facing surfaces of the adjusting assembly 50 (i.e., surfaces facing the second end plate 411 of the second vortex 410) are collectively referred to as the second fluid action surfaces of the adjusting assembly 50, and the fluid pressure acting on the second fluid action surfaces will cause the adjusting assembly 50 to experience an axially upward force. Figure 2 and Figure 7 As shown, the first fluid action surface includes a first pressure-bearing region (i.e., the region corresponding to A1 below) capable of contacting the fluid discharged from the discharge pressure compression chamber 84 and thus receiving force, and a second pressure-bearing region (i.e., the region corresponding to A2 below) capable of contacting the fluid in the suction pressure region and thus receiving force. The second fluid action surface includes a third pressure-bearing region (i.e., the region corresponding to A3 below) capable of contacting the fluid in the intermediate compression chamber through the pressure tap 417 provided at the second end plate and thus receiving force, and a fourth pressure-bearing region (i.e., the region corresponding to A4 below) capable of contacting the fluid in the suction pressure region and thus receiving force. Figure 6 As shown, the first fluid-acting surface includes the upper surface 51a of the stepped portion 514, the upper surface 52a of the upper annular section 511, the upper surface 53a of the middle section 513, the upper surface 54a of the annular protrusion 522, and the upper surface 55a of the lower annular section 512. The second fluid-acting surface includes the lower surface 51b of the horizontal section 521, the bottom surface 52b of the groove 5132, and the lower surface 53b of the lower annular section 512.

[0058] Return to reference Figures 1 to 3 The adjusting component 50 is configured to move up and down along the axial direction. For example... Figure 2 As shown, when the lower surface 53b of the lower annular section 512 of the adjusting assembly 50 abuts against the upper surface of the second end plate 411 of the second scroll 410 and covers the adjusting channel 414, thereby preventing fluid communication between the corresponding compression chamber and the low-pressure chamber 60, the scroll compressor 1 operates at full load. Figure 3 As shown, when the lower surface 53b of the lower annular section 512 of the regulating assembly 50 moves away from the upper surface of the second end plate 411 of the second scroll 410, the regulating channel 414 is directly exposed to the low-pressure chamber 60, thereby allowing the corresponding compression chamber to be in fluid communication with the low-pressure chamber 60, and the scroll compressor 1 operates in a partial load working state.

[0059] like Figures 1 to 3 As shown, the insert 13 includes a horizontal section 131 for abutting against the muffler cover 12 and a protrusion 132 extending axially upward from the upper surface of the horizontal section 131 at approximately the center of the horizontal section 131. An exhaust passage 133 is provided in the protrusion 132, penetrating both the protrusion 132 and the horizontal section 131. The muffler cover 12 is generally annular and arranged around the protrusion 132.

[0060] like Figures 1 to 3 As shown, the sealing ring 14 is located below the insert 13, providing an axial seal with the insert 13 and a radial seal with the adjusting assembly 50, thereby isolating the low-pressure chamber 60 from the high-pressure chamber 70. Specifically, the sealing ring 14 includes a horizontal section 141 for radial sealing with the adjusting assembly 50 (specifically, the upper annular section 511 of the adjusting assembly 50) for example, by a sealing ring, and a protrusion 142 extending axially upward from the upper surface of the horizontal section 141 at approximately the center of the horizontal section 141, the protrusion 142 providing an axial seal with the insert 13. The scroll compressor 1 also includes an elastic member 15 that abuts against the horizontal section 141 of the sealing ring 14 to push the sealing ring 14 toward the insert 13.

[0061] like Figures 1 to 3 As shown, in the assembled state, the regulating assembly 50 is sealed to the hub of the second scroll 410 to define an regulating chamber 55 that is in fluid communication with the intermediate compression chamber via a pressure tap 417 (see Figure 1). Figure 3 The third pressure-bearing area is the area of ​​the second fluid action surface exposed to the regulating cavity 55. Specifically, the first seal 53 of the regulating assembly 50 is sealed to the first hub 415 of the second vortex 410, and the second seal 54 of the regulating assembly 50 is sealed to the second hub 416 of the second vortex 410. The first hub 415 and the second hub 416 may each be provided with an oblique channel, so that the first seal 53 and the second seal 54 can be inserted therein. The regulating assembly 50 is positioned radially outside the sealing ring 14 and the first hub 415 of the second vortex 410. The upper annular section 511 of the regulating assembly 50 is radially sealed to the horizontal section 141 of the sealing ring 14 through a sealing ring. The second hub 416 of the second vortex 410 is inserted into the groove 5132 of the regulating assembly 50, so that the lower annular section 512 surrounds the second hub 416. The lower surface 51b of the horizontal segment 521 of the adjusting assembly 50 is spaced apart from the upper surface of the second end plate 411 of the second scroll 410. Therefore, the adjusting cavity 55 is defined by the first hub 415, the second hub 416 of the second scroll 410, the lower surface 51b of the horizontal segment 521 of the adjusting assembly 50, and the upper surface of the second end plate 411 of the second scroll 410. For example... Figure 3As shown, the regulating chamber 55 is in fluid communication with the intermediate compression chamber of the compression mechanism 40 through the pressure tap 417. The regulating chamber 55 is located on one side of the second fluid action surface of the regulating assembly 50, so that the fluid in the regulating chamber 55 can apply pressure to the second fluid action surface of the regulating assembly 50 in a direction toward the opposite first fluid action surface (i.e., upward in the axial direction).

[0062] In the prior art, a back pressure chamber is typically provided on one side of the first fluid action surface of the regulating component 50. The fluid in the back pressure chamber can apply pressure to the first fluid action surface of the regulating component 40 in a direction toward the opposite second fluid action surface (i.e., downward in the axial direction). However, in this invention, no back pressure chamber is provided on one side of the first fluid action surface of the regulating component 50. Instead, a portion of the first fluid action surface (the upper surface 51a of the stepped portion 514) is in contact with the high-pressure fluid discharged from the discharge pressure compression chamber 84, while the remaining portion (the upper surface 52a of the upper annular section 511, the upper surface 53a of the middle section 513, the upper surface 54a of the annular protrusion 522, and the upper surface 55a of the lower annular section 512 of the regulating component 50) is in contact with the low-pressure fluid in the low-pressure chamber 60.

[0063] Figure 7 A schematic diagram of the force analysis of the adjusting component 50 is shown, where the weight of the adjusting component 50 itself is negligible. Furthermore, since the area occupied by the exhaust channel 413 is relatively small, the force influence of the exhaust channel 413 is ignored. Figures 1 to 3 As shown, the first fluid action surface of the regulating assembly 50 is at least partially in contact with the fluid discharged from the discharge pressure compression chamber 84 (upper surface 51a of the stepped portion 514) and at least partially in contact with the fluid in the low-pressure chamber 60 (suction pressure region) (upper surface 52a of the upper annular section 511, upper surface 53a of the middle section 513, upper surface 54a of the annular protrusion 522, and upper surface 55a of the lower annular section 512), and is subjected to the fluid discharged from the discharge pressure compression chamber 84 along the first direction. The first fluid pressure F1 applied by the discharged fluid and the fluid in the low-pressure chamber 60, the second fluid action surface of the regulating component 50 is at least partially in contact with the fluid in the intermediate compression chamber (the lower surface 51b of the horizontal section 521) and at least partially in contact with the fluid in the low-pressure chamber 60 (suction pressure region) (the bottom surface 52b of the groove 5132 and the lower surface 53b of the lower annular section 512), and is subjected to the second fluid pressure F2 applied by the fluid in the intermediate compression chamber and the fluid in the low-pressure chamber 60 along the second direction.

[0064] like Figure 7 As shown, in the axial direction, the adjusting component 50 is subjected to a first downward axial fluid pressure F1 = P at the first fluid action surface. dis ×A1+Psuc ×A2, where P dis P is the pressure of the fluid discharged from the discharge pressure compression chamber 84, i.e., the discharge pressure of the scroll compressor 1; suc A1 is the pressure of the fluid in the low-pressure chamber 60, i.e., the suction pressure of the scroll compressor 1; A2 is the area of ​​the upper surface 51a of the step portion 514 of the regulating assembly 50; A3 is the sum of the areas of the upper surface 52a of the upper annular section 511, the upper surface 53a of the middle section 513, the upper surface 54a of the annular protrusion 522, and the upper surface 55a of the lower annular section 512 of the regulating assembly 50. In the axial direction, the regulating assembly 50 is subjected to an upward axial pressure F2 = P at the second fluid action surface. int ×A3+P suc ×A4, where P int To regulate the pressure of the fluid in chamber 55, i.e., the intermediate pressure chamber pressure of scroll compressor 1; P suc A1 is the pressure of the fluid in the low-pressure chamber 60, i.e., the suction pressure of the scroll compressor 1; A2 is the area of ​​the lower surface 51b of the horizontal section 521; A4 is the sum of the areas of the bottom surface 52b of the groove 5132 and the lower surface 53b of the lower annular section 512. The regulating component 50 is configured to be subjected to different first fluid pressures F1 and second fluid pressures F2 according to different operating states of the system (e.g., different evaporation and condensation temperatures of the fluid circulation system used by the compressor—such as an air conditioning system), so that the regulating component 50 can automatically move up and down in the axial direction. The different operating states of the system correspond to different ratios of the discharge fluid pressure to the suction fluid pressure of the scroll compressor 1. When the first fluid pressure F1 is greater than the second fluid pressure F2, i.e., P... dis ×A1+P suc ×A2>P int ×A3+P suc ×A4=k1×P suc ×A3+P suc ×A4, i.e., P dis / P suc >(k1×A3+A4-A2) / A1, where k1 is the pressure ratio of the intermediate pressure chamber when the scroll compressor 1 is in a partial load operating state, k1=P int / P suc The regulating component 50 can cover the regulating channel 414 to close it, allowing the scroll compressor 1 to switch from a partial load operating state to a full load operating state. When the first fluid pressure F1 is less than the second fluid pressure F2, i.e., P... dis ×A1+P suc ×A2=k2×P suc ×A3+P suc ×A4<P int ×A3+Psuc ×A4, i.e., P dis / P suc <(k2×A3+A4-A2) / A1, where k2 is the pressure ratio of the intermediate pressure chamber when the scroll compressor 1 is operating at full load, k2=P int / P suc The regulating component 50 can move away from the regulating channel 414 to open the regulating channel 414, so that the scroll compressor 1 can switch from full-load operation to partial-load operation.

[0065] According to the present invention, the scroll compressor automatically moves up and down in the axial direction by relying solely on the pressure changes on the two opposite fluid action surfaces of the regulating component 50, thereby covering or opening the regulating channel 414 so that the scroll compressor 1 automatically switches between full-load and partial-load operating states, thereby automatically adjusting the capacity of the scroll compressor 1 according to the system operating state.

[0066] Furthermore, in existing technologies, a floating seal assembly is required to define the back pressure chamber, and an electromagnetic regulating valve is needed to supply fluid to the regulating chamber to control its pressure. Therefore, the structure of existing scroll compressors is relatively complex and costly. However, the scroll compressor of the present invention does not have a floating seal assembly for defining the back pressure chamber, nor does it have an electromagnetic regulating valve for controlling the pressure of the regulating chamber. Therefore, the scroll compressor of the present invention requires fewer parts, resulting in lower cost, easier assembly, and higher reliability.

[0067] Preferably, at least one of the first scroll 422 and the second scroll 412 is provided with a tip seal 430 at its tip. Taking the second scroll 412 as an example, Figure 8 A tip seal 430 is shown located at the tip of the second scroll 410. Specifically, a slot 4121 is provided at the tip of the second scroll 412 of the second scroll 410, and the tip seal 430 is fitted into the slot 4121. Preferably, the tip of the first scroll 422 may also have a similar structure to the tip of the second scroll 412. Preferably, the tip seal 430 may have a disc shape; however, it is conceivable that the tip seal 430 may have any suitable shape. The tip seal 430 can be used to seal the tips of the first scroll 422 and the second scroll 412 and prevent wear on the tips of the first scroll 422 and the second scroll 412.

[0068] The following describes some alternative embodiments of the present invention, wherein the same components will not be described again.

[0069] Figure 10 and Figure 11A longitudinal sectional view of a scroll compressor according to a second embodiment of the present invention is shown. The difference from the scroll compressor according to the first embodiment of the present invention is that: Figure 10 and Figure 11 As shown, the scroll compressor includes a muffler cover 12' and an insert 13', but does not include a sealing ring. The insert 13' is disposed at the central hole of the muffler cover 12', and the adjusting assembly 50' radially seals with the insert 13' (e.g., via a sealing ring). The insert 13' includes a horizontal section 131' for abutting the muffler cover 12' and a protrusion 132' extending axially upward from the upper surface of the horizontal section 131' at approximately the center of the horizontal section 131'. An exhaust passage 133' is provided in the protrusion 132' through the protrusion 132' and the horizontal section 131'. The insert 13' also includes an annular section 134' extending axially downward from the lower surface of the horizontal section 131'. The upper annular section 511' of the adjusting assembly 50' radially seals with the annular section 134' of the insert 13' (e.g., via a sealing ring). The stress condition of the adjusting component 50' is the same as that of the adjusting component 50 of the scroll compressor 1 according to the first embodiment of the present invention, and will not be described again here. In this embodiment, since the scroll compressor does not have a sealing ring, the number of parts of the scroll compressor can be reduced, thereby simplifying the structure of the scroll compressor, making the scroll compressor easier to install, and improving the stability of the scroll compressor.

[0070] Figure 12 and Figure 13 A longitudinal sectional view of a scroll compressor according to a third embodiment of the present invention is shown. The difference from the scroll compressor according to the first embodiment of the present invention is that: Figure 12 and Figure 13 As shown, the scroll compressor includes a muffler cover 12” but excludes an insert and a sealing ring. The muffler cover 12” has an axial cylindrical portion 121” defining a central hole, and the adjusting assembly 50” radially seals with the axial cylindrical portion 121” of the muffler cover 12”. Specifically, the upper annular section 511” of the adjusting assembly 50” radially seals with the axial cylindrical portion 121” of the muffler cover 12” (e.g., via a sealing ring). The stress condition of the adjusting assembly 50” is the same as that of the adjusting assembly 50 of the scroll compressor 1 according to the first embodiment of the present invention, and will not be described again here. In this embodiment, since the scroll compressor does not have a sealing ring and an insert, the number of parts of the scroll compressor can be reduced, thereby simplifying the structure of the scroll compressor, making the scroll compressor easier to install, and improving the stability of the scroll compressor.

[0071] In other embodiments of the present invention not shown, a back pressure cavity may be provided on one side of the first vortex so that the first vortex can move axially.

[0072] The basic beneficial effects of this invention are as follows:

[0073] 1. The scroll compressor 1 of the present invention automatically moves up and down along the axial direction by relying solely on the pressure changes on the two opposite fluid action surfaces of the regulating component 50, thereby covering or opening the regulating channel 414 so that the scroll compressor 1 automatically switches between full-load operation and partial-load operation, thereby automatically adjusting the capacity of the scroll compressor 1 according to the system operating state.

[0074] 2. The scroll compressor 1 of the present invention does not have a floating sealing ring assembly for limiting the back pressure chamber and does not have an electromagnetic regulating valve for controlling the pressure of the regulating chamber of the scroll compressor. Therefore, the scroll compressor of the present invention requires fewer parts, making the scroll compressor of the present invention cheaper, easier to assemble and more reliable.

[0075] 3. For the variable frequency compressor using the technical solution of the present invention, compared with the normal compressor, it can run at a higher speed to meet the same cooling capacity requirement, thereby increasing the volumetric efficiency by increasing the speed and reducing the wear of easily worn parts of the compressor.

[0076] 4. For the fixed-frequency compressor using the technical solution of this invention, the compressor can be operated in a partial load state in the high evaporation and high cooling capacity zone by adjusting the channel, thereby saving energy. When the compressor needs to operate in a low load state, there is no need for multiple start-stop cycles, and the compressor can be kept running continuously in a partial load state, improving the reliability of the compressor.

[0077] Exemplary embodiments of the scroll compressor according to this disclosure have been described in detail herein; however, it should be understood that this disclosure is not limited to the specific embodiments described and shown above. The various embodiments according to this disclosure can be used individually or in combination. Various modifications and variations can be made to this disclosure by those skilled in the art without departing from its spirit and scope. All such modifications and variations fall within the scope of this disclosure. Furthermore, all components described herein can be replaced by other technically equivalent components.

Claims

1. A scroll compressor, comprising: A first vortex, the first vortex including a first end plate and a first vortex extending from the first end plate; as well as The second vortex includes a second end plate and a second vortex extending from the second end plate. The first vortex and the second vortex mesh with each other to define a plurality of compression chambers between the first vortex and the second vortex. The compression chambers include an intake pressure compression chamber communicating with the intake pressure region, an exhaust pressure compression chamber communicating with the exhaust pressure region, and an intermediate compression chamber located between the intake pressure compression chamber and the exhaust pressure compression chamber. The second end plate is provided with an adjustment channel (414) extending from the upper surface of the second end plate to the compression chamber, and The scroll compressor further includes regulating components (50, 50', 50''), which are adapted to selectively cover and open the regulating channel and have opposing first and second fluid action surfaces. The first fluid action surface is subjected to a first fluid pressure applied by a fluid along a first direction, and the second fluid action surface is subjected to a second fluid pressure applied by a fluid along a second direction. The characteristic feature is that the adjusting component is configured to be subjected to different first and second fluid pressures according to different operating states of the system, enabling the adjusting component to automatically move up and down in the axial direction. Specifically, when the first fluid pressure is greater than the second fluid pressure, the adjusting component can cover the adjusting channel to close it; and when the first fluid pressure is less than the second fluid pressure, the adjusting component can move away from the adjusting channel to open it. The first fluid action surface includes a first pressure-bearing region capable of contacting and receiving force from the fluid discharged from the discharge pressure compression chamber; the second fluid action surface includes a third pressure-bearing region capable of contacting and receiving force from the fluid in the intermediate compression chamber via a pressure tap (417) disposed at the second end plate; the first fluid action surface also includes a second pressure-bearing region capable of contacting and receiving force from the fluid in the suction pressure region; and the second fluid action surface also includes a fourth pressure-bearing region capable of contacting and receiving force from the fluid in the suction pressure region. The second vortex includes a hub, which includes a first hub (415) and a second hub (416) defining an annular chamber. The first hub is located radially inside the second hub. The regulating assembly is sealed to the hub of the second vortex to define a regulating chamber (55) that is in fluid communication with the intermediate compression chamber via the pressure tap. The third pressure-bearing region is the area of ​​the second fluid action surface exposed to the regulating chamber.

2. The scroll compressor of claim 1, wherein The adjustment assembly includes a first seal (53) that engages with the first hub of the second vortex and a second seal (54) that engages with the second hub of the second vortex.

3. The scroll compressor according to claim 1 or 2, wherein The adjustment assembly includes a split body, which includes a first component (51) and a second component (52), and the first and second seals of the adjustment assembly are embedded between the first component and the second component.

4. The scroll compressor of claim 3, wherein The first component includes an upper annular section (511) and a lower annular section (512), the upper annular section being adapted to seal with a corresponding component to isolate the discharge pressure region from the inhalation pressure region, and the lower annular section being adapted to cover the adjustment channel.

5. The scroll compressor of claim 1 or 2, wherein The scroll compressor includes a muffler cover having an axial cylindrical portion (121'') defining a central hole, and the adjustment assembly is radially sealed to the axial cylindrical portion.

6. The scroll compressor of claim 1 or 2, wherein The scroll compressor includes a muffler cover and an insert (13'), the insert being disposed at the central hole of the muffler cover, and the adjustment assembly being radially sealed to the insert.

7. The scroll compressor of claim 1 or 2, wherein The scroll compressor includes a muffler cover, an insert (13), and a sealing ring (14). The insert is disposed at the central hole of the muffler cover, the sealing ring is disposed below the insert and provides axial sealing with the insert, and the sealing ring provides radial sealing with the adjusting assembly.

8. The scroll compressor of claim 7, wherein, The sealing ring has a horizontal section (141) and a protrusion (142) extending upward in an axial direction from the upper surface of the horizontal section. The scroll compressor also includes an elastic member (15) that abuts against the horizontal section to push the sealing ring toward the insert.

9. The scroll compressor of claim 1 or 2, wherein, The second vortex is axially fixed.

10. The scroll compressor of claim 1 or 2, wherein, At least one of the first and second volutes is provided with a tip seal at its tip.

11. The scroll compressor of claim 1 or 2, wherein, A back pressure chamber is provided on one side of the first vortex, and the first vortex is axially movable.

12. The scroll compressor of claim 1 or 2, wherein, The different operating states of the system correspond to different ratios of the discharge fluid pressure to the suction fluid pressure of the scroll compressor.

Images