JPH02100039U - - Google Patents

Description

[Brief explanation of drawings]

Fig. 1 is a schematic diagram of a remaining liquid amount detection device according to an embodiment of the present invention, Fig. 2 is an enlarged schematic diagram of the vicinity of the electrode portion of the same liquid remaining amount detection device, and Fig. 3 is a schematic diagram of the same liquid remaining amount detection device. A block diagram of the device, FIG. 4 is a characteristic diagram of the remaining liquid amount detecting device, and FIG. 5 is a flowchart showing an example of the liquid amount detection processing procedure of the remaining liquid amount detecting device.
Fig. 6 is a time chart showing the signal waveforms of each part of the liquid remaining amount detection device, and Figs. 7 and 8 are cross-sectional schematic diagrams showing an example of the liquid remaining amount detection device used in a conventional kerosene heating appliance. It is. (Explanation of symbols), 1...Liquid remaining amount detection device, 2...
Cartridge type liquid supply tank, 3... Ultrasonic vibrator (ultrasonic transmitting/receiving means), 4... Tank side electrode, 5
... Apparatus body, 6... Cartridge tank storage section, 7
...Tank side electrode, 8...Control section, 13...Liquid amount display section.

Claims (1)

[Scope of Claim for Utility Model Registration] In a liquid remaining amount detection device for detecting the remaining amount of liquid in a cartridge type liquid replenishment tank attached to a device, an ultrasonic transmitting/receiving means for transmitting ultrasonic waves and receiving reflected waves from the liquid surface; and an ultrasonic transmitting/receiving means provided in the cartridge-type liquid supply tank, connected to the ultrasonic transmitting/receiving means, and supplying electric power to the ultrasonic transmitting/receiving means. a tank side electrode provided on the device main body, when the cartridge type liquid replenishment tank is attached to the device main body,
a main body side electrode that contacts and connects with the tank side electrode; and a main body side electrode provided on the device main body, when the cartridge type liquid replenishment tank is attached to the device main body;
A liquid remaining amount detecting device comprising a liquid amount detecting means for transmitting and receiving ultrasonic waves by the ultrasonic transmitting and receiving means, detecting the time between transmission and reception, and detecting the liquid amount.