Scroll compressor with intermediate injection

Patent metadata

Field	Value
Publication number	US-12338818-B2
Application number	US-202318175974-A
Country	US
Kind code	B2
Filing date	Feb 28, 2023
Priority date	Feb 28, 2023
Publication date	Jun 24, 2025
Grant date	Jun 24, 2025

Abstract

A scroll compressor includes a compressor housing containing an orbiting scroll member, a non-orbiting scroll member, a pair of bands disposed between the non-orbiting scroll member and the compressor housing, a suction chamber, a discharge chamber, and an intermediate injection chamber defined by the pair of bands. The non-orbiting scroll member includes an intermediate injection port fluidly connecting the intermediate injection chamber to at least one compression pocket formed by the intermeshed scroll members. A heating, ventilation, air conditioning, and refrigeration system including a refrigerant circuit with a condenser, at least one 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 an intermediate injection chamber;
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 an intermediate injection port fluidly connecting the intermediate injection chamber to at least one of the compression pockets; and
a first band and a second band disposed within the compressor housing and each extending between the non-orbiting scroll member and the compressor housing, the intermediate injection chamber being defined by the first band and the second band.

2. The scroll compressor of claim 1 , wherein the first band forms a seal between the intermediate injection chamber and the discharge chamber, and the second band forms a seal between the intermediate injection chamber and the suction chamber.

3. The scroll compressor of claim 1 , wherein the first band and the second band each extend from the non-orbiting scroll member to the compressor housing.

4. The scroll compressor of claim 1 , further comprising:
a suction inlet in the compression housing, the suction chamber fluidly connecting the suction inlet to an inlet of the compression pockets,
a discharge outlet in the compression housing, the discharge chamber fluidly connecting an outlet of the compression pockets to the discharge outlet, and
an intermediate injection inlet in the compression housing, the intermediate injection chamber fluidly connecting the intermediate injection inlet to the intermediate injection port in the non-orbiting scroll member.

5. The scroll compressor of claim 1 , wherein the intermediate injection chamber encircles the non-orbiting scroll member.

6. The scroll compressor of claim 1 , wherein the first band and the second band each encircle the non-orbiting scroll member.

7. The scroll compressor of claim 1 , wherein the intermediate injection chamber has an annular shape.

8. The scroll compressor of claim 1 , wherein the compressor housing includes an upper portion and a lower portion, the first band extending from the non-orbiting scroll member to the upper portion of the compressor housing, the intermediate injection chamber being defined by the upper portion of the compressor housing.

9. The scroll member of claim 8 , wherein the upper portion of the compressor housing is shrink fitted onto the non-orbiting scroll member via the first band and the second band.

10. The scroll compressor of claim 1 , wherein the first band contacts the compressor housing and the non-orbiting scroll member.

11. A heating, ventilation, air conditioning, and refrigeration (HVACR) system, comprising:
a refrigerant circuit including a condenser, at least one 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 an intermediate injection chamber,
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 an intermediate injection port fluidly connecting the intermediate injection chamber to at least one of the compression pockets, and
a first band and a second band each extending between the non-orbiting scroll member and the compressor housing, the intermediate injection chamber being defined by the first band and the second band.

12. The HVACR of claim 11 , wherein the first band forms a seal between the intermediate injection chamber and the discharge chamber, and the second band forms a seal between the intermediate injection chamber and the suction chamber.

13. The HVACR of claim 11 , wherein the first band and the second band each extend from the non-orbiting scroll member to the compressor housing.

14. The HVACR of claim 11 , wherein the scroll compressor includes:
a suction inlet in the compression housing, the suction chamber fluidly connecting the suction inlet to an inlet of the compression pockets,
a discharge outlet in the compression housing, the discharge chamber fluidly connecting an outlet of the compression pockets to the discharge outlet, and
an intermediate injection inlet in the compression housing, the intermediate injection chamber fluidly connecting the intermediate injection inlet to the intermediate injection port in the non-orbiting scroll member.

15. The HVACR of claim 11 , wherein the intermediate injection chamber encircles the non-orbiting scroll member.

16. The HVACR of claim 11 , wherein the first band and the second band each encircle the non-orbiting scroll member.

17. A method of making a scroll compressor, comprising:
placing an upper portion of a compressor housing over a non-orbiting scroll member, the upper portion of the compressor housing surrounding the non-orbiting scroll member, and a first band and a second band each being disposed between the upper portion of the compressor housing and the non-orbiting scroll member; and
interference fitting the upper portion of the compressor housing onto the non-orbiting scroll member via the first band and the second band, wherein the interference fitting forms an intermediate injection chamber defined by the first band, the second band, the upper portion of the compressor housing, and the non-orbiting scroll member, the intermediate injection chamber fluidly connecting an intermediate injection inlet in the compressor housing to an intermediate injection port in the non-orbiting scroll member.

18. The method of claim 17 , further comprising:
heating of the upper portion of the compressor housing, prior to placing the upper portion of the compressor housing onto the non-orbiting scroll member,
wherein the interference fitting is a shrinking fitting that includes cooling of the upper portion of the compressor housing, which results in the upper portion of the compressor housing being shrink fit onto the non-orbiting scroll member via the first band the second band, the first band and the second band being shrink bands.

19. The method of claim 17 , wherein the scroll compressor includes an orbiting scroll member intermeshed with the non-orbiting scroll member to form compression pockets, and the interference fitting forms a discharge chamber that fluidly connects an outlet of the compression pockets to a discharge outlet in the compressor housing.

Assignees

• Trane Int Inc

Inventors

• Lepak Derrick
• Smerud Scott J

Classifications

• F04C18/0253

  Details concerning the base · CPC title

• F04C18/0246

  Details concerning the involute wraps or their base, e.g. geometry · CPC title

• F04C18/0207

  both members having co-operating elements in spiral form · CPC title

• F25B31/026 Primary

  with compressor of rotary type · CPC title

• F04C2230/60

  Assembly methods · CPC title