Heat exchange – Regenerator – Checker brick structure
Patent
1979-06-18
1982-07-06
Scott, Samuel
Heat exchange
Regenerator
Checker brick structure
165 23, 165 28, 165 43, 623234, 236 87, F25B 1300
Patent
active
043378188
ABSTRACT:
A heating and air conditioning control system havng a compressor clutch cycle control feature for controlling the in-car temperature of a vehicle passenger compartment is disclosed. The system comprises an automatic temperature control (ATC) sensor (32) which provides a modulated vacuum control signal for a vacuum motor (38). The vacuum motor has an output which adjusts a biasing element in an electrical switch (82), resulting in on/off duty cycling of an electrically energizable clutch (28) which transmits power from the vehicle engine to the air conditioner compressor (26). The percentage of time that the compressor is on versus the time off is a function of the control signal which is, in turn, a function of the ambient, in-car, and manually selected set point temperatures sensed by the ATC sensor. At ambient temperatures below a predetermined minimum, the ATC sensor produces a control signal which shuts off the compressor and places the system in a heating mode, thereby preventing needless cooling of ambient air prior to heating. During the cooling mode, the refrigeration unit compressor is energized only as needed to maintain the passenger compartment at the set-point temperature, thus minimizing power usage.
REFERENCES:
patent: 3315730 (1967-04-01), Weaver et al.
patent: 3724230 (1973-04-01), Muto et al.
patent: 3759058 (1973-09-01), Jacobs
patent: 4135368 (1979-01-01), Mohr et al.
Eaton Corporation
Focarino Margaret A.
Grace C. H.
Johnston R. A.
Lewis J. G.
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