Head pressure control including means for sensing condition of r

Details Head pressure control including means for sensing condition of r Head pressure control including means for sensing condition of r

1980-05-19

1982-05-11

Wayner, William E.

Refrigeration

Automatic control

Refrigeration producer

62129, 62149, F25B 4100, G01K 1300

Patent

active

043286828

ABSTRACT:
A sensing device detects "flashing" in a refrigerant liquid line, upstream from the expansion valves of the evaporators of a refrigeration system. In response, a valve opens in a line extending between the compressor discharge line and a receiver, to bypass discharge vapor into the receiver, thus raising the head pressure to an extent sufficient to satisfy the requirement for a steady liquid refrigerant flow at the expansion valve. The head pressure is raised only to the minimal extent necessary to satisfy this requirement. Disclosed is a sensor of the type incorporating a sight glass in the path of a beam extending between photoelectric cells, though other sensing devices of an equivalent nature can be used. The invention can comprise a single sensing device in the liquid line extending to one or more evaporators connected in parallel. Alternatively, one may utilize separate sensing devices, one for each of several evaporators connected in parallel, with each sensing device having the capability of operating the valve, thus to assure a minimal but sufficient head pressure within the liquid line sufficient to maintain a liquid refrigerant seal at the expansion valve where flashing has been detected by its associated sensor.

REFERENCES:
patent: 2286961 (1942-06-01), Hanson
patent: 2564310 (1951-08-01), Nussbaum et al.
patent: 3145544 (1964-08-01), Weller
patent: 3151470 (1964-10-01), Quick
patent: 3839877 (1974-10-01), Kramer
patent: 3905202 (1975-09-01), Taft et al.
patent: 3933197 (1976-01-01), Zimmer et al.
patent: 4009825 (1977-03-01), Coon
patent: 4136528 (1979-01-01), Vogel et al.
patent: 4167858 (1979-09-01), Kojima et al.
patent: 4235095 (1980-11-01), Liebermann

Affiliated with

Also associated with

Rating

Head pressure control including means for sensing condition of r does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Head pressure control including means for sensing condition of r, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Head pressure control including means for sensing condition of r will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-750609