CO2 cooling system - Patent 6848268

Description

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Title:

CO2 cooling system

Document Type and Number:

United States Patent 6848268

Abstract:

A cooling system including an evaporator, a suction line, a two stage compressor, a gas cooler and a capillary tube. The suction line receives gaseous or two phase refrigerant from the evaporator, the compressor receives the gaseous or two phase refrigerant from the suction line, and the gas cooler cools compressed refrigerant discharged from the compressor. The capillary tube carries refrigerant from the gas cooler to the evaporator, and the suction line may include two straight portions with two portions of the capillary tube helically wound therearound, with a bypass valve around the capillary tube, and an accumulator between the suction line portions. An inter-cooler is between stages of the compressor, and a pan collects water condensate from the air side of the evaporator, and the refrigerant tube carries cooled refrigerant from the gas cooler through the pan. A controller selectively turns the compressor on and off based on temperature or pressure sensed by a sensor.

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Inventors:

Memory, Stephen B. (Kenosha, WI, US)

Yin, Jianmin (Kenosha, WI, US)

Application Number:

10/718275

Publication Date:

02/01/2005

Filing Date:

11/20/2003

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Assignee:

Modine Manufacturing Company (Racine, WI, US)

Primary Class:

Other Classes:

62/228.500, 62/510

International Classes:

F25B1/10 ; F25B9/00 ; F25B40/00 ; F25B40/02 ; F25B40/06 ; F25B41/06 ; F25B43/00 ; F25B49/02 ; F25B31/00 ; F25B41/00

Field of Search:

62/228.5, 62/503, 62/510, 62/228.1, 62/222, 62/513

US Patent References:

Refrigerating apparatus

March, 1922

Goosmann

Combination accumulator, metering tube, and heat exchanger for refrigeration systems

April, 1949

Cahenzli, Jr.

Flow control device for refrigeration apparatus

September, 1949

Gygax

Combination accumulator, heat exchanger, and metering device for refrigerating systems

November, 1950

Cahenzli, Jr.

Refrigerant control means

September, 1959

Zearfoss, Jr.

Refrigeration apparatus

July, ...

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