Refrigeration – Automatic control – Refrigeration producer
Patent
1988-10-05
1989-11-14
Wayner, William E.
Refrigeration
Automatic control
Refrigeration producer
62225, 236 68B, G05D 2330, G05D 1500
Patent
active
048798797
ABSTRACT:
Apparatus for controlling a heating or cooling system of the type that includes an evaporator and a thermostatic expansion valve having a thermostatic bulb. The control apparatus comprises a thermoelectric heat pump device responsive to an electrical control signal for controlling transfer of thermal energy to and from the thermostatic bulb, at least one temperature sensing device associated with the heating or cooling system, and an electronic control circuit. The control circuit is responsive to the sensed temperature to provide the electrical control signal to the thermoelectric device for maintaining a desired operating condition of the evaporator. The thermoelectric device acts as a gate or heat pump for controlling flow of thermal energy to and from the thermostatic bulb with a relatively small amount of electrical energy input. Preferably, the thermoelectric heat pump device is positioned between the thermostatic bulb and the suction line of the evaporator so as to control transfer of thermal energy between the suction line and the thermostatic bulb. Preferably, the control apparatus senses the temperature difference between the suction line and the inlet line of the evaporator and maintains the temperature difference within prescribed limits.
REFERENCES:
patent: 2807151 (1957-09-01), Baker
patent: 2936125 (1960-05-01), Leins
patent: 3157801 (1964-11-01), Shequen
patent: 3196685 (1965-07-01), Leigh et al.
patent: 3237415 (1966-03-01), Newton
patent: 3638446 (1972-02-01), Palmer
patent: 4441329 (1984-04-01), Dawley
patent: 4467613 (1984-08-01), Behr et al.
patent: 4651535 (1987-03-01), Alsenz
Ashrae 1988 Equipment Handbook, pp. 19.2-19.8.
Wirgau, Appliance Engineer, Aug. 1984, pp. 52-55.
Miller, Air Conditioning/Heating and Refrigeration News, Dec. 24, 1984.
Marsala Joseph
Winters Melvin M.
LandOfFree
Apparatus for controlling a thermostatic expansion valve does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Apparatus for controlling a thermostatic expansion valve, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus for controlling a thermostatic expansion valve will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1846500