Diagnosing a loss of refrigerant charge in a refrigerant system

Details Diagnosing a loss of refrigerant charge in a refrigerant system Diagnosing a loss of refrigerant charge in a refrigerant system

2003-12-10

2008-03-18

Jiang, Chen Wen (Department: 3744)

Refrigeration

With indicator or tester

Condition sensing

C062S149000

Reexamination Certificate

active

07343750

ABSTRACT:
A refrigerant system has a controller associated with it that determines an equilibrium pressure when the system is inactive. The controller determines if the equilibrium pressure differs from an expected equilibrium pressure corresponding to a current ambient temperature and the selected refrigerant type. When the difference exceeds a selected threshold, the controller determines that the amount of refrigerant within the circuit is below a desired level. In one example, the controller provides an indication of a low charge amount. The disclosed technique allows early detection of refrigerant charge loss and differentiation between loss-of-charge and other failure modes. Consequently, system performance is enhanced, component damage is prevented, service interruptions and maintenance are reduced, exhaustive troubleshooting is avoided and potential exposure to refrigerant substances is minimized.

REFERENCES:
patent: 4848096 (1989-07-01), Funahashi et al.
patent: 4876859 (1989-10-01), Kitamoto
patent: 5009076 (1991-04-01), Winslow
patent: 5481884 (1996-01-01), Scoccia
patent: 5875637 (1999-03-01), Paetow
patent: 6047556 (2000-04-01), Lifson
patent: 6206652 (2001-03-01), Caillat
patent: 6330802 (2001-12-01), Cummings et al.
patent: 6463747 (2002-10-01), Temple
patent: 6708508 (2004-03-01), Demuth et al.
patent: 2003/0182950 (2003-10-01), Mei et al.

Affiliated with

Also associated with

Rating

Diagnosing a loss of refrigerant charge in a refrigerant system does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Diagnosing a loss of refrigerant charge in a refrigerant system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Diagnosing a loss of refrigerant charge in a refrigerant system will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3967879