System Including High-Side and Low-Side Compressors

Patent metadata

Field	Value
Publication number	US-2016258656-A1
Application number	US-201615156977-A
Country	US
Kind code	A1
Filing date	May 17, 2016
Priority date	Feb 26, 2013
Publication date	Sep 8, 2016
Grant date	—

Abstract

A system may be operable to circulate a working fluid between first and second heat exchangers. The system may include a suction line, a low-side compressor, a high-side compressor and a discharge line. The low-side and high-side compressors may both be in fluid communication with the suction and discharge lines.

First claim

1 . A system operable to circulate fluid between first and second heat exchangers and including a suction line, a low-side compressor, a high-side compressor and a discharge line, said low-side and high-side compressors both being in fluid communication with said suction and discharge lines, wherein said suction line is fluidly coupled to a low-side suction inlet and a high-side suction inlet, wherein a discharge outlet of said high-side compressor feeds compressed fluid to said low-side suction inlet.

2 . The system of claim 1 , wherein a discharge chamber of said high-side compressor and a suction chamber of said low-side compressor are at substantially equal pressures when said high-side and low-side compressors are operating at approximately one-hundred percent capacity.

3 . The system of claim 1 , wherein said high-side compressor includes a first shell assembly and a first compression mechanism, said first shell assembly defining a first discharge-pressure chamber, said first compression mechanism is disposed within said first discharge-pressure chamber, and wherein said low-side compressor includes a second shell assembly and a second compression mechanism, said second shell assembly defining a suction-pressure chamber and a second discharge-pressure chamber, said second compression mechanism is disposed within said suction-pressure chamber.

4 . The system of claim 3 , wherein an oil sump of said low-side compressor is disposed within said suction-pressure chamber, and an oil sump of said high-side compressor is disposed within said first discharge-pressure chamber.

5 . The system of claim 4 , further comprising an oil conduit fluidly connecting said oil sumps of said low-side and high-side compressors.

6 . The system of claim 3 , wherein said low-side compressor includes a motor disposed within said suction-pressure chamber and drivingly engaged with said second compression mechanism.

7 . The system of claim 6 , wherein said high-side compressor includes another motor disposed within said first discharge-pressure chamber and drivingly engaged with said first compression mechanism.

8 . The system of claim 1 , further comprising a bypass conduit directly coupling said suction line with said low-side suction inlet.

9 . A system operable to circulate fluid between first and second heat exchangers and including a suction line, a low-side compressor, a high-side compressor and a discharge line, said low-side and high-side compressors both being in fluid communication with said suction and discharge lines, wherein said suction line is fluidly coupled to a low-side suction inlet and a high-side suction inlet, wherein said high-side suction inlet receives fluid discharged by said low-side compressor, the system including a bypass conduit directly coupling said suction line with said high-side suction inlet.

10 . The system of claim 9 , wherein a shell of said low-side compressor is disposed between said suction line and said high-side suction inlet, such that fluid passes through a suction chamber defined by said shell after exiting said suction line and before entering said high-side compressor.

11 . The system of claim 9 , wherein said high-side compressor includes a first shell assembly and a first compression mechanism, said first shell assembly defining a first discharge-pressure chamber, said first compression mechanism is disposed within said first discharge-pressure chamber, and wherein said low-side compressor includes a second shell assembly and a second compression mechanism, said second shell assembly defining a suction-pressure chamber and a second discharge-pressure chamber, said second compression mechanism is disposed within said suction-pressure chamber.

12 . The system of claim 11 , wherein an oil sump of said low-side compressor is disposed within said suction-pressure chamber, and an oil sump of said high-side compressor is disposed within said first discharge-pressure chamber.

13 . The system of claim 12 , further comprising an oil conduit fluidly connecting oil sumps of said low-side and high-side compressors.

14 . The system of claim 11 , wherein said low-side compressor includes a motor disposed within said suction-pressure chamber and drivingly engaged with said second compression mechanism.

15 . The system of claim 14 , wherein said high-side compressor includes another motor disposed within said first discharge-pressure chamber and drivingly engaged with said first compression mechanism.

16 . The system of claim 13 , further comprising a valve disposed on said oil conduit.

17 . The system of claim 16 , wherein said valve is electronically controlled to regulate oil levels within said oil sumps of said low-side and high-side compressors.

Assignees

• Emerson Climate Technologies

Inventors

• Perevozchikov Michael M
• Ignatiev Kirill M

Classifications

• F04C2270/24

  Level of liquid, e.g. lubricant or cooling liquid · CPC title

• F25B49/02

  for compression type machines, plants or systems · CPC title

• F04C28/02

  specially adapted for several pumps connected in series or in parallel · CPC title

• F04C18/0215

  where only one member is moving · CPC title

• F25B13/00

  Compression machines, plants or systems, with reversible cycle (defrosting cycles F25B47/02) · CPC title