Scroll compressor with intermediate injection

Patent metadata

Field	Value
Publication number	US-12474083-B2
Application number	US-202418582353-A
Country	US
Kind code	B2
Filing date	Feb 20, 2024
Priority date	Feb 28, 2023
Publication date	Nov 18, 2025
Grant date	Nov 18, 2025

Abstract

A scroll compressor includes a compressor housing containing an orbiting scroll member, a non-orbiting scroll member, bands disposed between the non-orbiting scroll member and the compressor housing, a suction chamber, a discharge chamber, and one or more intermediate injection chamber defined by the bands. The non-orbiting scroll member includes one or more intermediate injection ports fluidly connecting the one or more intermediate injection chambers to at least one compression pocket formed by the intermeshed scroll members. A heating, ventilation, air conditioning, and refrigeration system includes a refrigerant circuit with a condenser, an expander, an evaporator, and the scroll compressor fluidly connected. A method of making a scroll compressor includes placing an upper portion of a compressor housing over a non-orbiting scroll member with bands disposed therebetween, and interference fitting the upper portion onto the non-orbiting scroll member via the bands.

First claim

What is claimed is:

1 . A scroll compressor, comprising:
a compressor housing containing a suction chamber, a discharge chamber, and intermediate injection chambers; an orbiting scroll member and a non-orbiting scroll member intermeshed to form compression pockets within the compressor housing, the compression pockets configured to suction from the suction chamber and discharge into the discharge chamber, the non-orbiting scroll member including intermediate injection ports fluidly connecting the intermediate injection chambers to the compression pockets; and at least three bands disposed within the compressor housing, each of the at least three bands extending between the non-orbiting scroll member and the compressor housing, the intermediate injection chambers being defined by pairs of the at least three bands.

2 . The scroll compressor of claim 1 , wherein
the intermediate injection chambers include a first intermediate injection chamber and a second intermediate injection chamber, and the intermediate injection ports include:
a first intermediate injection port fluidly connecting the first intermediate injection chamber to at least one of the compression pockets, and
a second intermediate injection port fluidly connecting the second intermediate injection chamber to at least one of the compression pockets.

3 . The scroll compressor of claim 2 , wherein the pairs of the at least three bands include:
a first pair of the bands, the first intermediate injection chamber defined by the first pair of the bands, and a second pair of the bands, the second intermediate injection chamber defined by the second pair of the bands.

4 . The scroll compressor of claim 3 , wherein the at least three bands include a first band, the first pair of the bands and the second pair of the bands each include the first band.

5 . The scroll compressor of claim 3 , wherein the at least three bands include a second band and a third band, the first pair of the bands including the second band, and the second pair of the bands including the third band.

6 . The scroll compressor of claim 2 , further comprising:
a suction inlet in the compressor housing, the suction chamber fluidly connecting the suction inlet to an inlet of the compression pockets, a discharge outlet in the compressor housing, the discharge chamber fluidly connecting an outlet of the compression pockets to the discharge outlet, a first intermediate injection inlet in the compressor housing, the first intermediate injection chamber fluidly connecting the first intermediate injection inlet to the first intermediate injection port in the non-orbiting scroll member, and a second intermediate injection inlet in the compressor housing, the second intermediate injection chamber fluidly connecting the second intermediate injection inlet to the second intermediate injection port in the non-orbiting scroll member.

7 . The scroll compressor of claim 1 , wherein the at least three bands include:
a first band that forms a seal between the intermediate injection chambers and the discharge chamber, and a second band that forms a seal between the intermediate injection chambers and the suction chamber.

8 . The scroll compressor of claim 1 , wherein each of the at least three bands extends from the non-orbiting scroll member to the compressor housing.

9 . The scroll compressor of claim 1 , wherein each of the at least three bands contacts the non-orbiting scroll member and the compressor housing.

10 . The scroll compressor of claim 1 , wherein
one or more of the at least three bands encircles the non-orbiting scroll member, and one or more of the intermediate injection chambers encircles the non-orbiting scroll member and has an annular shape.

11 . The scroll compressor of claim 1 , wherein the compressor housing includes an upper portion and a lower portion, the at least three bands including a first band extending from the non-orbiting scroll member to the upper portion of the compressor housing, and the intermediate injection chambers including a first intermediate injection chamber defined by the first band, the upper portion of the compressor housing, and the non-orbiting scroll member.

12 . The scroll compressor of claim 11 , wherein the upper portion of the compressor housing is shrink fitted onto the non-orbiting scroll member via the at least three bands.

13 . A heating, ventilation, air conditioning, and refrigeration (HVACR) system, comprising:
a refrigerant circuit including a condenser, an expander, an evaporator, and a scroll compressor fluidly connected, a working fluid flowing through the refrigerant circuit, wherein the scroll compressor includes:
a compressor housing containing a suction chamber, a discharge chamber, and intermediate injection chambers,
an orbiting scroll member and a non-orbiting scroll member intermeshed to form compression pockets within the compressor housing, the compression pockets configured to suction from the suction chamber and discharge into the discharge chamber, the non-orbiting scroll member including intermediate injection ports fluidly connecting the intermediate injection chambers to the compression pockets, and
at least three bands disposed within the compressor housing, each of the at least three bands extending between the non-orbiting scroll member and the compressor housing, and the intermediate injection chambers being defined by pairs of the at least three bands.

14 . The HVACR system of claim 13 , wherein the pairs of the at least three bands include:
a first pair of the bands, the intermediate injection chambers including a first intermediate injection chamber defined by the first pair of the bands, and a second pair of the bands, the intermediate injection chambers including a second intermediate injection chamber defined by the second pair of the bands.

15 . The HVACR system of claim 13 , wherein
the intermediate injection chambers include a first intermediate injection chamber and a second intermediate injection chamber, and the intermediate injection ports include:
a first intermediate injection port fluidly connecting the first intermediate injection chamber to at least one of the compression pockets, and
a second intermediate injection port fluidly connecting the second intermediate injection chamber to at least one of the compression pockets.

16 . The HVACR system of claim 15 , wherein
the suction chamber is configured to receive a suction flow of the working fluid, the discharge chamber is configured to receive a discharge flow of the working fluid from the compression pockets, and the intermediate injection chambers including a first intermediate injection chamber configured to receive a first intermediate injection flow of the working fluid and a second intermediate injection chamber configured to receive a second intermediate injection flow of the working fluid.

17 . The HVACR system of claim 16 , further comprising:
a suction inlet in the compressor housing configured to direct the suction flow of the working fluid into the suction chamber, the suction chamber fluidly connecting the suction inlet to an inlet of the compression pockets, a discharge outlet in the compressor housing configured to direct the discharge flow of the working fluid from the discharge chamber out of the compressor, the discharge chamber fluidly connecting an outlet of the compression pockets to the discharge outlet, a first intermediate injection inlet in the compressor housing configured to direct the first intermediate injection

Assignees

• Trane Int Inc

Inventors

• Smerud Scott J
• Lepak Derrick

Classifications

• F24F2013/202

  Mounting a compressor unit therein · CPC title

• F04C2230/602

  Gap; Clearance · CPC title

• F04C2210/10

  working · 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

• F04C18/0261

  Details of the ports, e.g. location, number, geometry · CPC title