Refrigeration – Automatic control – Of external fluid or means
Patent
1979-09-24
1981-07-07
Wayner, William E.
Refrigeration
Automatic control
Of external fluid or means
62408, 236101D, F25D 1704, G05D 2302
Patent
active
042767547
ABSTRACT:
A low cost control regulates air flow between the freezer and food compartments of a side-by-side refrigerator and cooperates with a freezer thermostat to form a system which regulates operation of the refrigerator compressor in an energy efficient manner. A spiral coil spring of thermostat metal material has its inner end secured to a damper shaft to bias damper movement between positions opening and closing a control housing orifice in response to changes in temperature. A cylinder fitted around and secured to the outer end of the spring coil rotates to adjust the spring bias for selectively changing the temperature setting of the control. A control arm has a split sleeve at one end releasably clamped to the cylinder at a selected angle for initially calibrating the control and system, the opposite arm end being slidable on the control housing to rotate the arm for selectively varying the spring bias. The spring is responsive to selected changes in food compartment temperature to open the orifice and let cool freezer air into the food compartment when required and then to close the orifice for minimizing the frequency and duration of compressor operations initiated by the freezer thermostat.
REFERENCES:
patent: 2337484 (1943-12-01), McCollum
patent: 3378199 (1968-04-01), Snell
patent: 3893307 (1975-07-01), Jacobs
Haug John A.
McAndrews James P.
Sharp Melvin
Texas Instruments Incorporated
Wayner William E.
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