Patent ID: 7779835

Claim:
A liquid ejection device comprising: an inhaling port portion; an ejection head for ejecting a liquid to be inhaled by a user through the inhaling port portion; a first sensor having at least any one of a pressure sensor and a flowmeter provided in an inhaling passage and outputting a signal indicating inhalation action of the user by detecting a predetermined negative pressure or flow rate; a second sensor for detecting another action of the user relating to inhalation, the second sensor being different from the first sensor; and a determining portion for determining an operation of ejecting the liquid of the ejection head in response to both a first signal output from the first sensor and a second signal output from the second sensor, wherein the determining portion enables ejection of the liquid from the ejection head only in a state in which the second signal is output to indicate inhalation intention of the user, and the first signal is output to indicate inhalation action of the user.