JPS648634U - - Google Patents

Description

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of an electric pot to which the water quantity detection device according to the present invention is applied, Fig. 2 is a circuit diagram of its control device, Fig. 3 is a diagram showing input and output voltage waveforms of the water quantity detection device, and Fig. 4 The figure is a partially enlarged explanatory diagram, No. 5
The figure is a circuit diagram of a control device showing another embodiment of the present invention, and FIG. 6 is an explanatory diagram showing input/output voltage waveforms of the input/output detection device. 1... Metal container, 3... Lifting pipe (communication pipe),
7...Electric heater, 6a-6e...Individual electrode, 9
...Common electrode, 10...Microcomputer (
pulse voltage supply means, water level determination means), 12...
Comparator (means for determining water level).

Amendment September 16, 1986 The scope of claims for utility model registration is amended as follows.

[Claims for Utility Model Registration] The liquid in the container flowing in and out of an insulating communication pipe connected to the container is used as a common electrode, and the common electrode and each individual A pulse voltage supply means applies a pulse voltage between the electrode and the resistor via a resistor, and the voltage generated between the two electrodes or between the terminals of the resistor is detected, and the water level is determined by comparing the detected voltage with a reference voltage. A water amount detection device comprising a water level determination means for determining the presence or absence of water.

Claims (1)

[Scope of utility model registration request] An insulating communication pipe whose lower end is connected to the lower side of a container containing liquid and extends upward in parallel to the central axis of the container, and an insulating communication pipe arranged at a predetermined interval in the longitudinal direction on the outer periphery of the communication pipe. a common electrode made of a conductive container member to which the liquid in the container is electrically connected; and a pulse for applying a pulse voltage via a resistor between the individual electrodes and the common electrode. Voltage supply means, and water level determining means for detecting a voltage generated between the common electrode and each individual electrode or between both terminals of the resistor, and comparing the detected voltage with a reference voltage to determine the presence or absence of a water level. A water amount detection device consisting of.