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US 4,708,878 AGranted
Process for temperature controlling a liquid
OwnerUlrich Hagelauer, Uwe Faustinventors
Life of this patent
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Abstract
A method for the temperature control of a liquid and an apparatus to effect such a method wherein the heating of the liquid is carried out by irradiation with acoustic ultrasonic waves. Temperature measurement is effected by a probe immersed in the liquid or by contact-free measurement of infra-red radiation from the liquid. Temperature control is effected by comparison of the measured temperature with a predetermined desired temperature. Since the acoustic ultrasonic heating is thermally inertialess, extreme accuracy of temperature control is possible.
Claims11
A process for controlling the temperature of a liquid comprising:
- providing acoustic ultrasonic wave generating means, responsive to a control signal, for generating acoustic ultrasonic waves to substantially homogeneously heat a liquid;
- irradiating at least a portion of said liquid with acoustic ultrasonic waves from said acoustic ultrasonic wave generating means to substantially homogeneously heat said at least a portion of said liquid;
- providing temperature sensing means for measuring the temperature of said heated liquid;
- measuring the temperature of said heated liquid with said temperature sensing means to obtain an actual temperature of said liquid;
- providing electronic control means, operably connected to said acoustic ultrasonic wave generating means and said temperature sensing means, for comparing said actual temperature of said heated liquid with a predetermined desired temperature of said heated liquid and producing a control signal based on said comparison;
- comparing said actual temperature of said heated liquid with a predetermined desired temperature of said heated liquid and producing a control signal based on said comparison;
- feeding said control signal to said acoustic ultrasonic wave generating means.
4 more elements
Dependencies are inferred from the claim text.