Compressor with an Oil Separator

Patent metadata

Field	Value
Publication number	US-2016290693-A1
Application number	US-201415038234-A
Country	US
Kind code	A1
Filing date	Nov 19, 2014
Priority date	Nov 25, 2013
Publication date	Oct 6, 2016
Grant date	—

Abstract

The present application provides a compressor for use with a flow of carbon dioxide. The compressor may include a first stage compression mechanism for compressing the flow of carbon dioxide from a low pressure to an intermediate pressure, an oil separator downstream of the first stage compression mechanism, and a second stage compression mechanism positioned downstream of the oil separator for compressing the flow of carbon dioxide from the intermediate pressure to a high pressure.

First claim

1 . A compressor for use with a flow of carbon dioxide, comprising:
a first stage compression mechanism for compressing the flow of carbon dioxide from a low pressure to an intermediate pressure; an oil separator downstream of the first stage compression mechanism; and a second stage compression mechanism downstream of the oil separator for compressing the flow of carbon dioxide from the intermediate pressure to a high pressure.

2 . The compressor of claim 1 , wherein the first stage compression mechanism comprises a first stage input in communication with the flow of carbon dioxide at low pressure.

3 . The compressor of claim 1 , further comprising a shell casing and wherein the first stage compression mechanism and the second stage compression mechanism are positioned within the shell casing.

4 . The compressor of claim 3 , further comprising a motor positioned within the shell casing and in communication with the first stage compression mechanism and the second stage compression mechanism.

5 . The compressor of claim 3 , wherein the first stage compression mechanism comprises a first stage output in communication within the shell casing for the flow of carbon dioxide at intermediate pressure.

6 . The compressor of claim 3 , wherein the shell casing comprises a second stage pathway in communication with the second stage compression mechanism.

7 . The compressor of claim 1 , wherein the second stage compression mechanism comprises a second stage input in communication with the flow of carbon dioxide at intermediate pressure.

8 . The compressor of claim 1 , wherein the second stage compression mechanism comprises a second stage output in communication with the flow of carbon dioxide at high pressure.

9 . The compressor of claim 1 , wherein the oil separator comprises an expansion chamber.

10 . The compressor of claim 9 , wherein the oil separator comprises a J-tube within the expansion chamber.

11 . The compressor of claim 9 , wherein the oil separator comprises an oil pan and a wire mesh within the expansion chamber.

12 . The compressor of claim 1 , further comprising a check valve upstream of the oil separator.

13 . The compressor of claim 1 , wherein the oil separator comprises an oil drain in communication with a shell casing.

14 . The compressor of claim 13 , wherein the oil separator comprises a check valve on the oil drain.

15 . A method of compressing a flow of carbon dioxide for use in a refrigeration system, comprising:
compressing the flow of carbon dioxide from a low pressure to an intermediate pressure in a first stage compressor; passing the flow of carbon dioxide at the intermediate pressure through an oil separator; and compressing the flow of carbon dioxide from the intermediate pressure to a high pressure in a second stage compressor.

16 . A compressor for use with a flow of a refrigerant, comprising:
a shell casing; a first stage compression mechanism for compressing the flow of the refrigerant from a low pressure to an intermediate pressure positioned within the shell casing; an oil separator downstream of the first stage compression mechanism and positioned outside the shell casing; a second stage compression mechanism downstream of the oil separator for compressing the flow of the refrigerant from the intermediate pressure to a high pressure positioned within the shell casing; and a motor to drive the first stage compression mechanism and the second stage compression mechanism positioned within the shell casing.

17 . The compressor of claim 16 , wherein the oil separator comprises an expansion chamber.

18 . The compressor of claim 17 , wherein the oil separator comprises a J-tube positioned within the expansion chamber.

19 . The compressor of claim 16 , wherein the oil separator comprises an oil drain in communication with the shell casing.

20 . The compressor of claim 16 , wherein the refrigerant comprises a flow of carbon dioxide.

Assignees

• Coca Cola Co

Inventors

• Pereira Roberto Horn

Classifications

• F25B31/004

  oil recirculating arrangements · CPC title

• F25B31/026

  with compressor of rotary type · CPC title

• F25B1/10

  with multi-stage compression (with cascade operation F25B7/00) · CPC title

• F25B43/02 Primary

  for separating lubricants from the refrigerant · CPC title

• F25B9/008

  the refrigerant being carbon dioxide · CPC title