Airline coffee brewer

Details Airline coffee brewer Airline coffee brewer

A - Human Necessities

47

J

A47J 31/00 (2006.01) A47J 31/56 (2006.01) G01F 23/28 (2006.01)

Patent

CA 2427346

An ultrasonic system for measuring the volume of liquid in a container (65) having a lid (73) in which an ultrasonic signal is emitted and received by a sensor subsystem (64) located on the underside of the lid of the ultrasonic system. The ultrasonic system can measure the exact amount of liquid or the level of the liquid held in the container by processing the roundtrip time the ultrasonic signals took to travel from the sensor subsystem to the surface of the liquid where the ultrasonic signals are reflected back to the ultrasonic sensor subsystem. A solid state, three-phase SCR/diode bridge (96) converts a three-phase alternating current (AC) to a direct current (DC) power source for heating the liquid in a boiler subsystem (57) prior to its transport to the contain er. A second, triac controlled heater (86) is powered by a single phase of the three phase power source, and is used to warm and maintain the liquid held within the container at a constant temperature.

L'invention concerne un système ultrasonore pour mesurer le volume de liquide dans un récipient doté d'un couvercle dans lequel un signal ultrasonore est émis et reçu par un sous-système capteur placé sur le côté inférieur dudit couvercle dudit système ultrasonore. Ce dernier permet de mesurer la quantité exact de liquide ou son niveau contenu dans le récipient par traitement du temps que mettent les signaux ultrasonores pour parcourir la distance entre le sous-système capteur et la surface du liquide qui réfléchit les signaux ultrasonores vers ledit sous-système. Un pont SCR/diode triphasé, à semi-conducteurs convertit un courant alternatif triphasé (CA) en source d'alimentation en courant continu (CC) pour chauffer le liquide dans un sous-système chaudière avant son transfert dans le récipient. Un second dispositif de chauffage à commande à triac est alimenté par une seule phase de la source à courant triphasé et sert à chauffer le liquide et à le maintenir à une température constante dans le récipient.

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