Refrigeration system with a scroll machine having a plate inserted in a base of the scroll machine

Patent metadata

Field	Value
Publication number	US-12510073-B2
Application number	US-202318232665-A
Country	US
Kind code	B2
Filing date	Aug 10, 2023
Priority date	Aug 16, 2022
Publication date	Dec 30, 2025
Grant date	Dec 30, 2025

Abstract

A scroll machine, in particular a scroll compressor, has a first scroll unit with a base and a scroll rib protruding from the base with a scroll rib tip, a second scroll unit with a base and a scroll rib protruding from the base with a scroll rib tip. The first scroll unit can be moved along an orbital path relative to the second scroll unit and the first scroll unit and the second scroll unit engage with each other to form pressure chambers, and the scroll rib of a scroll rib tip having a face seal abuts sealingly to the base of the respective other scroll unit. The base of the first scroll unit and/or the base of the second scroll unit include(s) a pocket with an insert plate arranged in the pocket. Also contemplated is a refrigeration system.

First claim

The invention claimed is:

1 . A scroll machine ( 2 ), having
a first scroll unit ( 100 ) with a first base ( 130 ) and a first scroll rib ( 110 ) protruding from the first base ( 130 ) with a first scroll rib tip ( 160 ), a second scroll unit ( 200 ) with a second base ( 230 ) and a second scroll rib ( 210 ) protruding from the second base ( 230 ) with a second scroll rib tip ( 260 ), wherein the first scroll unit ( 100 ) can be moved along an orbital path relative to the second scroll unit ( 200 ), and the first scroll unit ( 100 ) and the second scroll unit ( 200 ) engage with each other to form pressure chambers, the first scroll rib tip ( 160 ) of the first scroll rib ( 110 ) sealingly interacts with the second base ( 230 ) of the second scroll unit ( 200 ), and the second scroll rib tip ( 260 ) of the second scroll rib ( 210 ) sealingly interacts with the first base ( 130 ) of the first scroll unit ( 100 ), characterized in that the first base ( 130 ) of the first scroll unit ( 100 ) comprises a first pocket ( 132 ) with a first insert plate ( 136 ) arranged in the first pocket ( 132 ), and the second base ( 230 ) of the second scroll unit ( 200 ) comprises a second pocket ( 232 ) with a second insert plate ( 236 ) arranged in the second pocket ( 232 ), wherein the first pocket ( 132 ) is arranged along a first scroll channel ( 120 ), the first scroll channel ( 120 ) being formed by the first scroll rib ( 110 ), the first pocket ( 132 ) is spaced apart by a wall distance (W) from the first scroll rib ( 110 ), the wall distance (W) separating the first pocket ( 132 ) from the first scroll rib ( 110 ) being greater than zero, and the wall distance (W) between the first scroll rib ( 110 ) and the first pocket ( 132 ) of the first scroll unit ( 100 ) is measured across the first scroll channel ( 120 ), and wherein the second pocket ( 232 ) is arranged along a second scroll channel ( 220 ), the second scroll channel ( 220 ) being formed by the second scroll rib ( 210 ), the second pocket ( 232 ) is spaced apart by a wall distance (W) from the second scroll rib ( 210 ), the wall distance (W) separating the second pocket ( 232 ) from the second scroll rib ( 210 ) being greater than zero, and the wall distance (W) between the second scroll rib ( 210 ) and the second pocket ( 232 ) of the second scroll unit ( 200 ) is measured across the second scroll channel ( 220 ).

2 . The scroll machine ( 2 ) according to claim 1 ,
characterized in that the first insert plate ( 136 ) is loosely inserted in the first pocket ( 132 ), and the second insert plate ( 236 ) is loosely inserted in the second pocket ( 232 ).

3 . The scroll machine ( 2 ) according to claim 1 ,
characterized in that each one of the first and second the pockets ( 132 , 232 ) has a pocket depth (D), that each one of the first and second insert plates ( 136 , 236 ) has a plate thickness (B), and that the plate thickness (B) is greater than the pocket depth (D) for each one of the first and second pockets ( 132 , 232 ).

4 . The scroll machine ( 2 ) according to claim 1 ,
characterized in that a first transition fillet ( 135 ) is provided between the first base ( 130 ) and the first scroll rib ( 110 ), and a second transition fillet ( 235 ) is provided between the second base ( 230 ) and the second scroll rib ( 210 ).

5 . The scroll machine ( 2 ) according to claim 4 ,
characterized in that the first wall distance (W) corresponds approximately to a first radius (R) of the first transition fillet ( 135 ), and the second wall distance (W) corresponds approximately to a second radius (R) of the second transition fillet ( 235 ).

6 . The scroll machine ( 2 ) according to claim 4 ,
characterized in that the second scroll unit ( 200 ) has a first injection port ( 250 ) for a medium from an economizer cycle, and the first injection port ( 250 ) has a first port section ( 251 ) in the second transition fillet ( 235 ) and a second port section ( 252 ) in the scroll rib ( 210 ).

7 . The scroll machine ( 2 ) according to claim 1 ,
characterized in that the second insert plate ( 236 ) has at least one lubricating notch ( 239 ).

8 . The scroll machine ( 2 ) according to claim 1 ,
characterized in that the second scroll unit ( 200 ) has at least one injection port ( 250 ) for a medium from an economizer cycle.

9 . The scroll machine ( 2 ) according to claim 8 ,
characterized in that the at least one injection port ( 250 ) comprises a recess ( 242 ) in the second scroll rib ( 210 ) of the second scroll unit ( 200 ).

10 . The scroll machine ( 2 ) according to claim 1 ,
characterized in that the first scroll rib ( 110 ) of the first scroll unit ( 100 ) comprises a first face seal ( 170 ) and/or the second scroll rib ( 210 ) of the second scroll unit ( 200 ) comprises a second face seal ( 270 ).

11 . The scroll machine ( 2 ) according to claim 10 ,
characterized in that the first insert plate ( 136 ) has a first sealing surface ( 138 ) which interacts with the second face seal ( 270 ), the second insert plate ( 236 ) has a second sealing surface ( 238 ) which interacts with the first face seal ( 170 ), and that the first and second sealing surface ( 138 , 238 ) are dimensioned such that in a complete movement of the first scroll unit ( 100 ) along the orbital path, the first and second face seals ( 170 , 270 ) cover the respective first and second insert plates ( 136 , 236 ) within the first and second sealing surfaces ( 138 , 238 ).

12 . The scroll machine ( 2 ) according to claim 10 ,
characterized in that the first face seal ( 170 ) comprises a first seal body ( 172 ) arranged in a first groove ( 175 ), and the second face seal ( 270 ) comprises a second seal body ( 272 ) arranged in a second groove ( 275 ).

13 . The scroll machine ( 2 ) according to claim 10 ,
characterized in that the first face seal ( 170 ) is arranged centrally on the first scroll rib tip ( 160 ), and the second face seal ( 270 ) is arranged centrally on the second scroll rib tip ( 260 ).

14 . The scroll machine ( 2 ) according to claim 10 ,
characterized in that the first face seal ( 170 ) is arranged at a distance (A) from a first scroll wall ( 140 ) of the first scroll rib ( 110 ,), the second face seal ( 270 ) is arranged at a distance (A) from a second scroll wall ( 240 ) of the second scroll rib ( 210 ), the distance (A) to the first scroll wall ( 140 ) is greater than a wall distance (W) between the first pocket ( 132 ) and the first scroll wall ( 140 ), and the distance (A) to the second scroll wall ( 240 ) is greater than a wall distance (W) between the second pocket ( 232 ) and the second scroll wall ( 240 ).

15 . The scroll machine ( 2 ) according to claim 1 ,
characterized in that the first scroll rib ( 110 ) extends from a first inner end section ( 115 ) to a first outer end section ( 116 ), the second scroll rib ( 210 ) extends from a second inner end section ( 215 ) to a second outer end section ( 216 ), a first groove ( 175 ) is arranged between the first inner end section ( 115 ) and the first outer end section ( 116 ), a second groove ( 275 ) is arranged between the second inner end section ( 215 ) and the second outer end section ( 216 ), the first groove ( 175 ) comprises a first face seal groove section ( 177 ) receiving a first seal body ( 172 ) and at least one first outlet groove section ( 176 , 178 ,), the at least one first outlet groove section ( 176 , 178 ) being arranged between the first face seal groove section ( 177 ) and the first inner end section ( 115 , 215 ) and/or between th

Assignees

• Bitzer Kuehlmaschinenbau Gmbh

Inventors

• Scharer Christian
• Hauser Markus
• Feller Klaus

Classifications

• F04C2240/801

  Wear plates · CPC title

• F04C29/0007

  Injection of a fluid in the working chamber for sealing, cooling and lubricating (sealing only F04C27/00; lubrication only F04C29/02; cooling F02B47/02, F02D21/00, F02M25/00) · CPC title

• F04C27/005 Primary

  Axial sealings for working fluid · CPC title

• F04C18/0284

  Details of the wrap tips · CPC title

• F04C18/0269

  Details concerning the involute wraps · CPC title