US20240318652A1

US20240318652A1 - Drive assemblies and compressors including the same

Info

Publication number: US20240318652A1
Application number: US18/186,281
Authority: US
Inventors: Kirill Michailovich Ignatiev; Robert Christopher Stover; Mikhail A. ANTIMONOV
Original assignee: Emerson Climate Technologies Inc
Current assignee: Copeland LP
Priority date: 2023-03-20
Filing date: 2023-03-20
Publication date: 2024-09-26
Also published as: KR20250136411A; US20250075700A1; WO2024196748A1; CN120752438A; DE112024001330T5

Abstract

A compressor including a shell, a scroll assembly, and driveshaft. The scroll assembly includes an orbiting scroll including a orbiting spiral wrap and a second opening including a drive bearing disposed therein. The drive bearing is axial aligned with the orbiting spiral wrap. The compressor includes an unloader rotationally connected to the driveshaft body and rotationally supported with a primary bearing.

Description

FIELD

The field relates generally to systems and methods for driveshaft assemblies and compressors, and more particularly, to shaft-through driveshaft assemblies including an unloader assembly for use in compressors.

BACKGROUND

Scroll compressors compress refrigerant using a scroll assembly including a non-orbiting scroll member and an orbiting scroll member that cooperate to form sealed pockets therebetween. During operation of the scroll compressor, motion of the orbiting scroll member relative to the non-orbiting scroll member continuously changes the volume of the sealed pockets to compress refrigerant within.
Scroll compressors typically include one or more bearings which support rotation of the driveshaft assemblies and a drive bearing for transmitting rotational motion of the driveshaft to the orbiting motion of the scroll member. The drive bearing is provided between a drive coupling of an orbiting scroll member and an eccentric body of the driveshaft. The drive bearing enables the eccentric body to rotate, applying a driving force to the drive coupling, such that the orbiting scroll member will orbit relative to the non-orbiting scroll member to effect compression of a fluid.
During operation, the driveshaft is typically exposed to a variety of loads resulting from driving the orbiting scroll, rotations of counterweights, rotor torque, and bearing reaction forces. These loads may cause deflection of the driveshaft. The magnitude of driveshaft deflection may be dependent on the rotational speed and the operating condition of the compressor. Driveshaft deflection, under these applied loads, may lead to bearing wear and/or compressor failure.
Efficient and reliable operation of the compressor is desirable to ensure that the climate-control system in which the compressor is installed is capable of effectively and efficiently providing a cooling and/or heating effect on demand. Furthermore, reducing wear on components, such as bearing assemblies, of the scroll compressor may increase the longevity of the compressor and the climate-control system.
This background section is intended to introduce the reader to various aspects of art that may be related to various aspects of the present disclosure, which are described and/or claimed below. This discussion is believed to be helpful in providing the reader with background information to facilitate a better understanding of the various aspects of the present disclosure. Accordingly, it should be understood that these statements are to be read in this light, and not as admissions of prior art.

SUMMARY

In one aspect, a compressor includes a shell and a scroll assembly disposed within the shell. The scroll assembly includes a non-orbiting scroll connected to the shell and including a first opening, and an orbiting scroll including a spiral wrap and a second opening including a drive bearing disposed therein, wherein the drive bearing is axial aligned with the spiral wrap. The compressor includes a driveshaft including a driveshaft body and an eccentric body. The eccentric body is disposed within the second opening and drivingly engaged with the orbiting scroll. The compressor includes a primary bearing disposed within the first opening of the non-orbiting scroll and an unloader rotationally connected to the driveshaft body and rotationally supported with the primary bearing. In another aspect, a compressor includes a shell and a scroll assembly disposed within the shell. The scroll assembly includes a non-orbiting scroll connected to the shell and including a first opening, and an orbiting scroll including a spiral wrap and a second opening including a drive bearing disposed therein, wherein the drive bearing is axial aligned with the spiral wrap. The compressor includes a driveshaft including a driveshaft body and an eccentric body. The eccentric body is disposed within the second opening and drivingly engaged with the orbiting scroll. The compressor includes a primary bearing connected to the shell and axially displaced from the non-orbiting scroll and an unloader rotationally connected to the driveshaft body and rotationally supported with the primary bearing.
Various refinements exist of the features noted in relation to the above-mentioned aspects. Further features may also be incorporated in the above-mentioned aspects as well. These refinements and additional features may exist individually or in any combination. For instance, various features discussed below in relation to any of the illustrated embodiments may be incorporated into any of the above-described aspects, alone or in any combination.

BRIEF DESCRIPTION OF THE DRAWINGS

The following figures illustrate various aspects of the disclosure.

FIG. 1 is a perspective view of an embodiment of a scroll compressor.

FIG. 2A is a cross-sectional view of the scroll compressor shown in FIG. 1 including an embodiment of a drive assembly.

FIG. 2B is a horizontal cross-sectional view of the scroll compressor shown in FIG. 1 including an embodiment of an unloader.

FIG. 2C is a horizontal cross-sectional view of the scroll compressor shown in FIG. 1 including another embodiment of an unloader.

FIG. 3 is a cross-sectional view of the scroll compressor shown in FIG. 1 including another embodiment of a drive assembly.

FIG. 4 is a cross-sectional view of the scroll compressor shown in FIG. 1 including another embodiment of a drive assembly.

FIG. 5 is a cross-sectional view of the scroll compressor shown in FIG. 1 including another embodiment of a drive assembly.

FIG. 6 is a cross-sectional view of the scroll compressor shown in FIG. 1 including another embodiment of a drive assembly.

FIG. 7 is a cross-sectional view of the scroll compressor shown in FIG. 1 including another embodiment of a drive assembly.

FIG. 8 is a cross-sectional view of the scroll compressor shown in FIG. 1 including another embodiment of a drive assembly.

FIG. 9 is a cross-sectional view of the scroll compressor shown in FIG. 1 including another embodiment of a drive assembly.

FIG. 10 is a cross-sectional view of the scroll compressor shown in FIG. 1 including another embodiment of a drive assembly.

FIG. 11 is a cross-sectional view of the scroll compressor shown in FIG. 1 including another embodiment of a drive assembly.

FIG. 12 is a cross-sectional view of the scroll compressor shown in FIG. 1 including another embodiment of a drive assembly.

FIG. 13 is a cross-sectional view of the scroll compressor shown in FIG. 1 including another embodiment of a drive assembly.

Corresponding reference characters indicate corresponding parts throughout the drawings.

DETAILED DESCRIPTION

Referring to FIG. 1 , a compressor, an example scroll compressor, is indicated generally at 100. The compressor 100 includes a compressor housing 102 forming at least one sealed cavity within which refrigerant compression is accomplished. The compressor housing 102 includes a shell 104, an end cap 106 disposed at a first end of the shell 104, and a base 110 disposed at an opposing second end of the shell 104. The compressor 100 includes an inlet 112 attached to the compressor housing 102, e.g., the shell 104, for drawing the working fluid in to the compressor 100. After the working fluid is compressed, the compressed working fluid exits the compressor 100 through a discharge fitting 114. The discharge fitting 114 may be attached to the compressor housing 102 in the shell 104, e.g., at the end cap 106. A discharge valve assembly, not shown, may be disposed within the discharge fitting 114 to prevent a reverse flow condition. A hermetic electric terminal 116 is attached to the compressor housing 102, e.g., in the shell 104.
The compressor 100 may include various drive assemblies A-L, shown in FIGS. 2-13 . The drive assemblies A-L includes a scroll assembly 120 including a non-orbiting scroll 124 and an orbiting scroll 122 operably engaged with a motor assembly 126. The motor assembly 126 includes a motor stator 128 and a rotor 130. The compressor 100 also includes a driveshaft 132 that may be press fit within the rotor 130. The rotor 130 transmits rotational power to the driveshaft 132. The motor assembly 126 may be a variable-speed motor for rotating the driveshaft 132 at any of a plurality of speeds. In the illustrated embodiment, the motor assembly 126 is disposed within the shell 104. In some other embodiments, the compressor 100 may be an open drive compressor driven by a motor assembly 126 that is disposed outside of the compressor housing 102.
The driveshaft 132 includes a driveshaft body 134 and an eccentric body 136 that may be offset from the driveshaft body 134. The driveshaft body 134 and the eccentric body 136 are both generally cylindrical in shape. The driveshaft body 134 includes a longitudinal axis extending in an axial direction between a first end portion and a second end portion that is axially spaced from the first end portion. In some embodiments, the eccentric body 136 extends from the first end of the driveshaft body 134. In other embodiments, the eccentric body 136 is positioned axially between the first end and the second end of the driveshaft body 134.
The compressor 100 may include at least one of a primary bearing 150 and/or a secondary bearing 152 that rotationally supports the driveshaft 132. The primary bearing 150 and/or the secondary bearing 152 may be rolling element bearings having an inner ring, an outer ring spaced radially outward from the inner ring, and a plurality of balls or rollers disposed between the inner ring and the outer ring. The inner ring includes an inner surface, e.g., a bearing surface, defining a bearing opening. Alternatively, in some embodiments, the primary bearing 150 and/or secondary bearing 152 are journal bearings, having the bearing surface defining the bearing opening. The primary bearing 150 and/or the secondary bearing 152 may rotationally support the driveshaft 132. If the primary bearing 150 and/or the secondary bearing 152 are rolling element bearings, the driveshaft 132 rotates with the inner ring. Alternatively, if the primary bearing 150 and/or the secondary bearing 152 are journal bearings, the driveshaft 132 rotates within the bearing opening and relative to the stationary bearing inner surface. The primary bearing 150 and/or the secondary bearing 152 may be any suitable bearing type.
The compressor 100 may include a first scroll side 154 and a second scroll side 156, axially displaced from the first scroll side 154, defined on either side of the scroll assembly 120. The first scroll side 154 is generally near the end cap 106 and the second scroll side 156 is generally near the motor assembly 126. The compressor 100 may also include a first motor side 158 and an opposing second motor side 159 axially displaced from the first motor side 158.
The orbiting scroll 122 includes a plate 160 including a spiral wrap 162 extending therefrom. The plate 160 defines an orbiting scroll opening 164 that is sized and shaped to receive a drive bearing 166 therein. The orbiting scroll opening 164 may be disposed generally in a center of plate 160 and spiral wrap 162. The drive bearing 166 may be in axial alignment with the spiral wrap 162. The eccentric body 136, of the driveshaft 132, is drivingly engaged to the drive bearing 166. The eccentric body 136 extends into, and/or through, the orbiting scroll opening 164 defined in the orbiting scroll 122. The rotational motion of the driveshaft 132 is transformed into the orbiting motion of the orbiting scroll 122 through the eccentric body 136 and the drive bearing 166. The non-orbiting scroll 124 includes a plate 168 and a spiral wrap 170 extending axially from the plate 168. The non-orbiting scroll 124 defines a non-orbiting scroll opening 172 that is generally aligned with the primary and/or secondary bearings 150 and 152. The non-orbiting scroll 124 may also include a hub, extending on an opposite side of the plate 168 from the spiral wrap 170. The hub may, at least partially, define the non-orbiting scroll opening 172. The primary bearing 150 or the secondary bearing 152 may be disposed within the non-orbiting scroll opening 172 of the non-orbiting scroll 124 when a bearing is used in the non-orbiting scroll.
The spiral wrap 170 may engage, mesh, with the spiral wrap 162 of the orbiting scroll 122 thereby creating a series of moving fluid pockets. The fluid pockets defined by the spiral wraps 162, 170 may decrease in volume as they move from a radially outer position (e.g., suction pocket at a suction pressure) to a radially inner position (e.g., discharge pocket at a discharge pressure that is higher than the suction pressure) throughout a compression cycle. The plates 160, 168 may include a discharge passage in communication with at least one of the fluid pockets at the radially inner position and allows compressed working fluid, such as refrigerant or a mixture of refrigerant and lubricant (at or near the discharge pressure) to flow therethrough.
The compressor 100 may further include an upper housing 186. The upper housing 186 may be connected to at least one of the compressor housing 102, e.g., the shell 104, and/or the non-orbiting scroll 124. The compressor 100 may also include a lower bearing bracket 188 connected to the compressor housing 102, e.g., the shell 104. The upper housing 186, the lower bearing bracket 188, and/or the non-orbiting scroll 124 may support at least one of the primary and/or the secondary bearings 150, 152, as described herein. For example, the upper housing 186 may define an upper opening 190 and the lower bearing bracket 188 may defined a lower opening 192. The primary bearing 150 or the secondary bearing 152, may be disposed, at least partially within either of the upper opening 190 and/or the lower opening 192. The upper opening 190 and/or the lower opening 192 may define the bearing surface. For example, at least one of the upper opening 190 and the lower opening 192 may be a journal bearing. The upper housing 186 may be arranged on either the first scroll side 154, see drive assemblies D, E, G, H, I, K, and L (FIGS. 5, 6, 8, 9, 10, 12, and 13 ) or the second scroll side 156, see drive assemblies A-C, F, and J (FIGS. 2-4, 7, and 11 ). In some embodiments, the upper opening 190 and/or the non-orbiting scroll opening 172 may be omitted. For example, in the embodiment shown in FIG. 10 , the compressor 100 may not include the upper opening 190. In another example, in the embodiment shown in FIG. 11 , the compressor 100 may not include the non-orbiting scroll opening 172.
The compressor 100 may be referred to as a “shaft-through” scroll compressor. In the “shaft-through” scroll compressor 100 described herein, the drive bearing 166 is located in a horizontal plane that is aligned with the spiral wrap 162 of the orbiting scroll 122. For example, the drive bearing 166 is at least partially axially aligned with the spiral wrap 162. See drive assemblies A-L (FIGS. 2-13 ). The shaft-through scroll compressor may have at least a portion of the driveshaft 132, e.g., the driveshaft body 134 and/or the eccentric body 136, extending through the orbiting scroll 122. In some embodiments, the “shaft-through” scroll compressor 100 may have at least a portion of the driveshaft 132, e.g., the driveshaft body 134 and/or the eccentric body 136, extending into and/or through the non-orbiting scroll opening 172 defined through the non-orbiting scroll 124. See drive assemblies A-I (FIGS. 2-10 ), and K-L (FIGS. 12 and 13 ). The driveshaft 132 may extend all the way through primary bearing 150, and additionally, all the way through the scroll assembly 120, such that at least a portion of the driveshaft 132 is arranged on both the first scroll side 154 and the second scroll side 156 of the scroll assembly 120. See drive assemblies B-H (FIGS. 3-9 ), and K-L (FIGS. 12 and 13 ). In the “shaft-through” scroll compressor 100, a tipping moment of the orbiting scroll 122 is minimized, allowing a reducing in the scroll clamping force, which in turn reduces friction losses between the scroll surfaces. In a “shaft-through” scroll compressor 100, the driveshaft 132 may have a reduced bending moment on the driveshaft 132, as compared to some other types of compressors that do not have a “shaft-through” scroll design.
The compressor 100 also includes an unloader 200 that is rotationally supported by at least one of the primary bearing 150 or the secondary bearing 152. Alternatively, in some embodiments, the unloader 200 may be rotationally supported by the drive bearing 166. The unloader 200 is disposed within the bearing opening and if the unloader 200 is rotationally supported by a roller bearing, the unloader 200 rotates along with the inner ring, alternatively, if the unloader 200 is rotationally supported by a journal bearing, the unloader 200 rotates relative to the bearing surface. The driveshaft 132, e.g., the driveshaft body 134, may include a recess 194, and at least a portion of the unloader 200 may be at least partially disposed within the recess 194. The unloader 200 provides compliance, between the driveshaft 132 and at least one of the primary bearing 150, the secondary bearing 152, and/or the drive bearing 166. The unloader 200 may provide compliance in a direction perpendicular, e.g., radially and/or tangentially, relative to the longitudinal axis of the driveshaft 132. In some embodiments, the unloader 200 may generally be in the shape of a cylindrical segment, having an outer surface 206, generally a cylindrical surface, and a flank surface 204 that is generally planar. See FIG. 2A. In some embodiments, the flank surface 204 may be convex. The flank surface 204 may be engaged with a flank surface 208 of the driveshaft 132. The flank surface 208 of the driveshaft 132 may at least partially define the recess 194. The unloader 200 and the driveshaft 132 are rotationally connected such that rotations of the driveshaft 132 result in rotations of the unloader 200.
Alternatively, in some embodiments, the unloader 200 may be generally annular in shape defining an unloader opening. See FIG. 2C. The driveshaft 132 extends, at least partially, into the unloader opening and the unloader 200 surrounds the driveshaft 132. The annular unloader 200 may include the outer surface 206 and an inner surface. The inner surface may include a flank surface 204 that is engaged with the flank surface 208 of the driveshaft 132, such that the annular unloader 200 rotates with rotations of the driveshaft 132. Alternatively, the unloader 200 may be any suitable shape, and/or configuration, enabling the unloader 200 to rotate along with the driveshaft 132 and move, e.g., flex and slide, relative to the driveshaft 132.
The compressor 100, including drive assemblies A-L, shown in FIGS. 2-13 , include various arrangements of the various components described above. For example, the unloader 200 may be rotationally supported by the primary bearing 150. See drive assemblies A-E (FIGS. 2-6 ), G (FIG. 8 ), and I-L (FIGS. 10-13 ), for example. Alternatively, and/or additionally, the unloader 200 may be rotationally supported by the secondary bearing 152. See drive assemblies F and H (FIGS. 7 and 9 ). The primary bearing 150 may be supported by the non-orbiting scroll 124. For example, the primary bearing 150 may be disposed within the non-orbiting scroll opening 172 of the non-orbiting scroll 124. See drive assemblies A, B, C, F, and I (FIGS. 2-4, 7, and 10 ), for example. Alternatively, and/or additionally, the primary bearing 150 is supported by the upper housing 186, e.g., the primary bearing 150 is disposed in the upper opening 190. See drive assemblies D, E, G, H, J, K, and L (FIGS. 5, 6, 8, 9, and 11-13 ), for example.
The unloader 200 may be rotationally supported by the secondary bearing 152. See drive assemblies F and H (FIGS. 7 and 9 ). For example, the unloader 200 may be rotationally supported by the secondary bearing 152 and the secondary bearing 152 is supported by the upper housing 186. See drive assembly F (FIG. 7 ). In another example, the unloader 200 is rotationally supported by the secondary bearing 152 and the secondary bearing 152 is supported by the non-orbiting scroll 124. See drive assembly H (FIG. 9 ).
The compressor 100 includes a coupling 202, such as an Oldham coupling, engaged with the orbiting scroll 122 and at least one of the non-orbiting scroll 124, the upper housing 186, and/or the compressor housing 102 to prevent relative rotation therebetween. In drive assemblies A-L (FIGS. 2-13 ), the coupling 202 is engaged between the orbiting scroll 122 and the non-orbiting scroll 124, preventing relative rotation therebetween.
The compressor 100 may include at least one of a first counterweight 210 and/or a second counterweight 212. The first and second counterweights 210, 212 are connected to the driveshaft 132, e.g., the driveshaft body 134 and/or the rotor 130, such that rotations of the driveshaft 132 rotates the first and second counterweights 210, 212. The axial position of the first and second counterweights 210, 212, e.g., relative to the scroll assembly 120, may be different for the various drive assemblies A-L (FIGS. 2-13 ).
The compressor 100 may include both of the first and second counterweights 210, 212. The first counterweight 210 and the second counterweight 212 may be positioned, axially, on opposing scroll sides 154, 156 of the scroll assembly 120. See drive assemblies B-D (FIGS. 3-5 ), and F-H (FIGS. 7-9 ). For example, the driveshaft body 134 extends all the way through the orbiting scroll opening 164 and non-orbiting scroll opening 172 such that at least a portion of the driveshaft 132 is disposed on the first scroll side 154 of the scroll assembly 120, and at least one of the first counterweight 210 or the second counterweight 212 is rotationally connected to the portion of the driveshaft 132 that is disposed on the first scroll side 154 of the scroll assembly 120. The second counterweight 212 may be rotationally connected to a portion of the driveshaft 132 that is disposed on the second scroll side 156 of the scroll assembly 120.
In some embodiments, the first and second counterweights 210, 212 may both rotationally connected to a portion of driveshaft 132 that is disposed on the second scroll side 156 of the scroll assembly 120. See drive assembly A, E, I, J, K, and L (FIGS. 2A, 6, 10, 11, 12, and 13 ) for example. The first counterweight 210 may be rotationally connected to the portion of driveshaft 132 that is disposed on the first scroll side 154 of the scroll assembly 120 and the second counterweight 212 may be disposed on the first motor side 158 of the motor assembly 126. See drive assembly B, C, D, F, G, and H (FIGS. 3, 4, 5, 7, 8, and 9 ) for example. The first counterweight 210 may be axially disposed on the first motor side 158 and second scroll side 156, and the second counterweight 212 may be axially disposed on the second motor side 159. See drive assembly A, E, I, J, K, and L (FIGS. 2A, 6, 10, 11, 12, and 13 ) for example. In some embodiments, the first and second counterweights 210, 212 may both be disposed on the second scroll side 156 of the scroll assembly 120. See drive assembly A, E, I, J, K, and L (FIGS. 2, 6, 10, 11, 12, and 13 ) for example.
The compressor 100 further includes one or more a first seal 216, e.g., an intermediate cavity pressure (ICP) seal, which may be disposed between the upper housing 186 and the orbiting scroll 122. See drive assemblies A-L (FIGS. 2-13 ). The compressor 100 may include the first seal 216 and a second seal 218. See drive assemblies K-L (FIGS. 12-13 ) which may be disposed between the upper housing 186 and the orbiting scroll 122. The compressor may have three seals including the first seal 216, the second seal 218, and a third seal 220. See drive assembly L (FIG. 13 ). The third seal 220 may be disposed between the orbiting scroll 122 and the non-orbiting scroll 124. See drive assembly L (FIG. 13 ).
The first and second seals 216, 218 may be ring shaped, and the first and second seals 216, 218 may be arranged concentrically. In some embodiments, the first seal 216 may be disposed between the upper housing 186 and the non-orbiting scroll 124 and the second seal 218 is disposed between the orbiting scroll 122 and the non-orbiting scroll 124. The various combination of seal configuration enables optimized axial balancing improving compressor efficiency. The compressor 100 may also include a lid 222, that covers at least one of the orbiting scroll opening 164 or the non-orbiting scroll opening 172. See drive assemblies I and J (FIGS. 10 and 11 ). For example, the driveshaft 132 extends through the orbiting scroll opening 164 and at least partially into the non-orbiting scroll opening 172 and the lid 222 covers the non-orbiting scroll opening 172. See drive assembly J (FIG. 11 ). In another example, the driveshaft 132 extends through the non-orbiting scroll opening 172 and at least partially into the orbiting scroll opening 164, and the lid 222 covers the orbiting scroll opening 164. See drive assembly I (FIG. 10 ). The upper housing 186 may include a portion that covers the upper opening 190. See drive assembly K and L (FIGS. 12 and 13 ).
The upper housing 186 may be disposed on the first scroll side 154 of the scroll assembly 120 and the lower bearing bracket 188 is disposed on the second scroll side 156 of the scroll assembly 120. See drive assemblies D, E, I, K, and L (FIGS. 5, 6, 10, 12, and 13 ). The compressor 100 may include both the upper housing 186 and the lower bearing bracket 188. See drive assemblies A, B, D, E, I, J, K, and L (FIGS. 2, 3, 5, 6, 10-13 ). Alternatively, the compressor 100 only includes at least one of the upper housing 186 and/or the lower bearing bracket 188. See drive assemblies C, F, G, and H (FIGS. 4, 7, 8, and 9 ).
The secondary bearing 152 may be supported by the lower bearing bracket 188. See drive assemblies A, B, D, E, I, J, K, and L (FIGS. 2, 3, 5, 6, and 10-13 ) for example. Alternatively, and/or additionally, the secondary bearing 152 is supported by the upper housing 186, see drive assemblies C and F (FIGS. 4 and 7 ) for example. The secondary bearing 152 may be supported by the non-orbiting scroll 124, see drive assemblies G and H (FIGS. 8 and 9 ).
Embodiments of the systems and methods of the present disclosure achieve superior results as compared to prior systems and methods. In particular, the compressor including both an unloader and a shaft-through scroll design in which the drive bearing is axially aligned with the spiral wrap of the orbiting scroll, have known benefits over other compressors. For example, the shaft-through scroll design may have a reduced bending moment on the driveshaft as compared to non-shaft-through scroll designs. In addition, the unloader provides driveshaft compliance to unload forces on the driveshaft caused by driveshaft deflections and control scroll flank contact forces independent of compressor speed. Accordingly, the shaft-through scroll design combined with the unloader, has improved scroll flank wear behavior and reduced scroll flank friction while maintaining tight flank-to-flank sealing compared to other known compressors. In addition, the shaft-through scroll compressors minimize a tipping moment of the orbiting scroll resulting in improved compressor balance and efficiency as friction is reduced between the thrust surfaces of the scrolls. Further, embodiments of the shaft-through scroll compressors have reduced noise levels.
When introducing elements of the present disclosure or the embodiment(s) thereof, the articles “a”, “an”, “the,” and “said” are intended to mean that there are one or more of the elements. The terms “comprising,” “including,” “containing,” and “having” are intended to be inclusive and mean that there may be additional elements other than the listed elements. The use of terms indicating a particular orientation (e.g., “top,” “bottom,” “side,” etc.) is for convenience of description and does not require any particular orientation of the item described.
As various changes could be made in the above constructions and methods without departing from the scope of the disclosure, it is intended that all matter contained in the above description and shown in the accompanying drawing(s) shall be interpreted as illustrative and not in a limiting sense.

Claims

1. A compressor comprising:

a shell;

a scroll assembly disposed within the shell, the scroll assembly comprising:

a non-orbiting scroll including a non-orbiting spiral wrap, wherein the non-orbiting scroll includes a first opening extending through the non-orbiting scroll;

an orbiting scroll including an orbiting spiral wrap and a second opening including a drive bearing disposed therein, wherein the drive bearing is axially aligned with the orbiting spiral wrap; and

a driveshaft including a driveshaft body and an eccentric body, the eccentric body disposed within the second opening and drivingly engaged with the drive bearing of the orbiting scroll, wherein at least a portion of the driveshaft extends through the first opening and through the non-orbiting spiral wrap such that the driveshaft includes a portion that is axially aligned with the non-orbiting spiral wrap, and the second opening and wherein the driveshaft does not extend beyond a first side of the scroll assembly;

a primary bearing disposed within the first opening of the non-orbiting scroll; and

an unloader rotationally connected to the driveshaft body and rotationally supported with the primary bearing.

2. (canceled)

3. The compressor of claim 1, wherein the driveshaft passes through the primary bearing and at least partially into an upper opening defined in an upper housing.

4. The compressor of claim 1, wherein the compressor further comprises:

a first counterweight connected to the driveshaft; and

a second counterweight connected to the driveshaft, the second counterweight axially spaced from the first counterweight.

5. (canceled)

6. The compressor of claim 4, wherein the first counterweight and the second counterweight are connected to the second portion of the driveshaft on a second side of the scroll assembly that opposes the first side of the scroll assembly.

7. The compressor of claim 4, wherein the compressor includes a motor drivingly engaged with the driveshaft, wherein the motor includes a motor first side and a motor second side axially displaced from the motor first side, wherein the first counterweight is disposed on the motor first side and the second counterweight is disposed on the motor second side.

8. The compressor of claim 4, wherein the unloader and the primary bearing are disposed axially from the first and second counterweights.

9. The compressor of claim 4, wherein the unloader is an annular unloader that surrounds the driveshaft.

10. The compressor of claim 1 further comprising a secondary bearing axially displaced from the primary bearing.

11. A compressor comprising:

a shell;

a scroll assembly disposed within the shell, the scroll assembly comprising:

a non-orbiting scroll including a non-orbiting spiral wrap, wherein the non-orbiting scroll including a first opening; and

an orbiting scroll including an orbiting spiral wrap and a second opening including a drive bearing disposed therein, wherein the drive bearing is axially aligned with the orbiting spiral wrap;

a driveshaft including a driveshaft body and an eccentric body, wherein the eccentric body is disposed within the second opening and drivingly engaged with the drive bearing of the orbiting scroll, wherein at least a portion of the driveshaft extends through the first opening and the second opening and through the non-orbiting spiral wrap such that the driveshaft includes a portion that is axially aligned with the non-orbiting spiral wrap, and wherein the driveshaft does not extend beyond a first side of the scroll assembly;

a primary bearing connected to the shell and axially displaced from the non-orbiting scroll; and

12. (canceled)

13. The compressor of claim 11, wherein the driveshaft passes through the primary bearing and at least partially into an upper opening defined in an upper housing.

14. The compressor of claim 11, wherein the compressor further comprises:

a first counterweight connected to the driveshaft; and

15. (canceled)

16. The compressor of claim 14, wherein the first counterweight and the second counterweight are connected to a second portion of the driveshaft on the second side of the scroll assembly that opposes the first side of the scroll assembly.

17. The compressor of claim 16, wherein the compressor includes a motor drivingly engaged with the driveshaft, wherein the motor includes a motor first side and a motor second side axially displaced from the motor first side, wherein the first counterweight is disposed on the motor second side and the second counterweight is disposed on the motor second side.

18. The compressor of claim 17, wherein the unloader and the primary bearing are disposed axially from the first and second counterweights.

19. The compressor of claim 18, wherein the unloader is an annular unloader that surrounds the driveshaft.

20. The compressor of claim 19, further comprising a secondary bearing axially displaced from the primary bearing.

21. A compressor comprising:

a shell;

a scroll assembly disposed within the shell, the scroll assembly comprising:

a non-orbiting scroll including a non-orbiting spiral wrap, wherein the non-orbiting scroll includes a first opening; and

an orbiting scroll including an orbiting spiral wrap and a second opening including a drive bearing disposed therein, wherein the drive bearing is axial aligned with the orbiting spiral wrap; and

a driveshaft including a driveshaft body and an eccentric body, the eccentric body disposed within the second opening and drivingly engaged with the drive bearing of the orbiting scroll;