Thermostat for the setting of a constant temperature for a fluid

Details Thermostat for the setting of a constant temperature for a fluid Thermostat for the setting of a constant temperature for a fluid

1985-03-25

1987-03-24

Cline, William R.

Heat exchange

Movable heating or cooling surface

Rotary drum

165 39, 165 65, F25B 2900, G05D 2300

Patent

active

046518134

ABSTRACT:
A process for the setting of a constant temperature for a fluid, and furtmore, to a thermostat for implementing the process. The constant temperature is set by the heating up of the fluid during its flow through a heat source. The fluid, prior to the setting of the constant temperature, is initially cooled down to a lower temperature, such that the temperature difference which is reached between the constant temperature and a lower temperature, is higher than the temperature-overshooting range of the cooling regulating circuit. These measures simplify the setting of the constant temperature inasmuch as only the heat source need be equipped with a high-performance regulator. Through the cooling section which is connected ahead of the heating element, there is maintained a minimum temperature differential. The temperature differential must be measured so high that the temperature-overshooting range of the cooling regulating circuit still remains below the constant temperature which is to be set by the heat source. It is to be understood, that the term temperature-overshooting range refers to the maximum deviation encountered relative to the value, which is transiently produced during a build-up sequence of the cooling regulating circuit, subsequent to a change in a disturbance variable. A thermostat for effectuating the process is equipped with a cooler and with a heating arrangement for the warming up of the fluid.

REFERENCES:
patent: 3329202 (1967-07-01), Birman
patent: 3370454 (1968-02-01), Flores
patent: 3612165 (1971-10-01), Haynes
patent: 3834617 (1974-09-01), Dyntar
patent: 4072181 (1978-02-01), Kostura et al.
patent: 4117881 (1978-10-01), Williams et al.

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