Liquid detection device for recording device

Abstract

Abstract PURPOSE:To provide the titled apparatus which is capable of detecting how the liquid exists in nozzles and whether the mixed air bubbles are presented or not by checking changes in the value of current flowing through an electric/heat energy conversion element, eliminating a special detection means. CONSTITUTION:Current is supplied to an electric/heat energy conversion element 7 to such as extent that no liquid drop is allowed to be formed and discharge and changes in the current value are checked corresponding to a temperature variation caused by a heat energy thus generated to detect the condition of a liquid in a nozzle 5. This only requires the connection of a current value detection circuit DT to an electrode l2 or the like eliminating any special detection means.

Inventors

• 👤 Akira Miyagawa
• 👤 晃 宮川

Bibliographic Details