Refrigeration – Processes – Defrosting or frost inhibiting
Reexamination Certificate
2007-10-31
2009-02-03
Ali, Mohammad M (Department: 3744)
Refrigeration
Processes
Defrosting or frost inhibiting
C062S324100
Reexamination Certificate
active
07484374
ABSTRACT:
A method includes operating a compressor of a heat pump system and is selectively providing vapor to a vapor injection port of the compressor via a vapor injection line and vapor injection valve. The method further includes determining a frost condition of a first and second heat exchanger of the heat pump system and closing a vapor injection valve to prevent fluid flow into the compressor at the vapor injection port. A direction of refrigerant flow is reversed to direct vaporized refrigerant to the one of said first and second heat exchangers experiencing the frost condition. The vapor injection valve is opened after a first predetermined time period following reversal of the refrigerant flow. The method further includes closing the vapor injection valve and reversing a direction of refrigerant flow within the heat pump system once the vapor injection valve is closed for a second predetermined time period.
REFERENCES:
patent: 3447335 (1969-06-01), Wheeler et al.
patent: 4850197 (1989-07-01), Taylor et al.
patent: 5174123 (1992-12-01), Erickson
patent: 5228301 (1993-07-01), Sjoholm et al.
patent: 5596878 (1997-01-01), Hanson et al.
patent: 5692389 (1997-12-01), Lord et al.
patent: 5848537 (1998-12-01), Biancardi et al.
patent: 6385980 (2002-05-01), Sienel
patent: 6718781 (2004-04-01), Freund et al.
patent: 7143594 (2006-12-01), Ludwig et al.
patent: 7275385 (2007-10-01), Abel et al.
patent: 2005/0120733 (2005-06-01), Healy et al.
patent: 2006/0010899 (2006-01-01), Lifson et al.
Notification Concerning Availability of the Publication of the International Application for PCT/US2007/006872.
Notification of Transmittal of the International Search Report and the Written Opinion of the International Searching Authority or the Declaration for PCT/US2007/006872.
Caillat Jean-Luc M.
Pham Hung M.
Van Hoose Ronald L.
Ali Mohammad M
Emerson Climate Technologies, Inc.
Harness & Dickey & Pierce P.L.C.
LandOfFree
Flash tank design and control for heat pumps does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Flash tank design and control for heat pumps, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Flash tank design and control for heat pumps will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4101119