FLASH TANK ECONOMIZER CYCLE CONTROL

Title:

FLASH TANK ECONOMIZER CYCLE CONTROL

Document Type and Number:

WIPO Patent Application WO/2010/036480

Kind Code:

A3

Abstract:

A flash tank economizer includes a sensor for sensing a condition indicative of pressure in the flash tank, and when that pressure is found to equal or exceed the critical pressure of the particular refrigerant being used, a controller responsively closes a valve in the economizer vapor line to shut off the economizer. A sensor is also provided to sense the pressure at the compressor mid-stage, and if that pressure is found to exceed the pressure in the flash tank, the controller causes the flow control device to function so as to prevent the flow of refrigerant from the compressor mid-stage to the flash tank. Provision is also made for selectively draining refrigerant from the flash tank to reduce the pressure therein from a supercritical to a subcritical condition.

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Inventors:

HUFF HANS-JOACHIM (US)
SCARCELLA JASON (US)

Application Number:

PCT/US2009/055358

Publication Date:

June 10, 2010

Filing Date:

August 28, 2009

Export Citation:

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Assignee:

CARRIER CORP (US)
HUFF HANS-JOACHIM (US)
SCARCELLA JASON (US)

International Classes:

F25B49/02; F25B41/04; F25B43/00

Foreign References:

KR20070082501A	2007-08-21
US7096679B2	2006-08-29
US20070151266A1	2007-07-05
US20050262859A1	2005-12-01

Other References: