Device for regulating heating capacity of a heat exchanger

Details Device for regulating heating capacity of a heat exchanger Device for regulating heating capacity of a heat exchanger

1980-07-28

1985-10-22

Tanner, Harry B.

Automatic temperature and humidity regulation

Heating radiator

Combined radiator and apartment controlled

237 123B, F28F 2700

Patent

active

045483558

ABSTRACT:
A device for regulating the heat output or heat capacity of a heat exchanger in an automotive vehicle with an actuating member to control the flow of a heat exchange medium and with a control device operating the actuating member. To provide input to the control device, signals are received from a highly rated internal temperature sensor and a lower rated heating air temperature sensor disposed at the outlet of the heat exchanger as well as a manually adjustable set point generator. The control device includes a pulse generator producing a triangular voltage of a constant frequency, with a differential amplifier for the signals of the temperature sensors as well as the set point generator. A comparator is provided for producing rectangular pulses in correspondence with the triangular voltage frequency, with a pulse width corresponding to the temperature signal of the differential amplifier. The heat exchanger is tubular and has a large ratio of heat exchange medium volume to heat dissipating surface area. The actuating member is formed as a solenoid valve which is in an open position when the electromagnet of the valve is unenergized. The valve is arranged downstream of the heat exchanger.

REFERENCES:
patent: 2262496 (1941-11-01), Hobbs et al.
patent: 2489652 (1949-11-01), Lehane
patent: 2801802 (1957-08-01), Jackson
patent: 3447603 (1969-06-01), Jones
patent: 3693532 (1972-09-01), Colinet et al.
patent: 4058255 (1977-11-01), Linder et al.

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