Refrigerant flow rate control based on liquid level in dual evap

Details Refrigerant flow rate control based on liquid level in dual evap Refrigerant flow rate control based on liquid level in dual evap

1994-03-03

1995-07-11

Wayner, William E.

Refrigeration

Automatic control

Refrigeration producer

62198, 62509, 62526, F25B 4104

Patent

active

054310261

ABSTRACT:
Pulse width modulation is used to control the flow rate through a solenoid expansion valve in a refrigeration system using a dual evaporator, two-stage cycle. The refrigeration cycle includes a phase separator which receives two phase refrigerant from the low temperature evaporator and supplies liquid refrigerant to the pulse width modulated solenoid valve. A liquid level sensor is disposed in the phase separator, and a controller for controlling the duty cycle of the pulse width modulated solenoid valve is provided to receive input from the liquid level sensor. The liquid level sensor can be of the type which provides a continuously variable signal as a function of liquid level, or it can be a liquid level switch which controls valve duty cycle on the basis of whether the phase separator liquid level is above or below a set level. Alternatively, two liquid level switches can be provided.

REFERENCES:
patent: 3443121 (1969-05-01), Weisbrod
patent: 3698204 (1972-10-01), Schlotterbeck et al.
patent: 4167858 (1979-09-01), Kojima et al.
patent: 4651535 (1987-03-01), Alsenz
patent: 4653288 (1987-03-01), Sayo et al.
patent: 4677830 (1987-07-01), Sumikawa et al.
patent: 4745767 (1988-05-01), Ohya et al.
patent: 4910972 (1990-03-01), Jaster
patent: 5094086 (1992-03-01), Shyu
patent: 5228308 (1993-07-01), Day et al.
patent: 5247989 (1993-09-01), Benevelli
patent: 5255529 (1993-10-01), Powell et al.
patent: 5255530 (1993-10-01), Janke

Affiliated with

Also associated with

Rating

Refrigerant flow rate control based on liquid level in dual evap does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Refrigerant flow rate control based on liquid level in dual evap, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Refrigerant flow rate control based on liquid level in dual evap will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-495783