PROBLEM TO BE SOLVED: To continue oxygen discharge from a cannula when release of a latch of a latch-type electromagnetic valve is caused by vibration or the like.SOLUTION: A respiration synchronizer of the present invention comprises: an electromagnetic valve including an oxygen supply port connected to an oxygen supply part, an oxygen discharge port connected to a cannula, and a pressure detection port to which a pressure sensor is connected and control means for controlling the electromagnetic valve on the basis of a signal from the pressure sensor. The electromagnetic valve includes: a valve body for performing switching between an oxygen supply state in which the oxygen supply port communicates with the oxygen discharge port and an oxygen non-supply state in which the oxygen discharge port communicates with the pressure detection port and a coil for driving the valve body. When current for performing switching to the oxygen non-supply state flows through the coil and, after that, current for performing switching to the oxygen supply state does not flow through the coil, the control means controls the electromagnetic valve so that current for performing switching to the oxygen non-supply state flows through the coil when a signal from the pressure sensor has not been detected for a predetermined time.SELECTED DRAWING: Figure 8【課題】ラッチ式電磁弁のラッチが振動等により外れた場合に、カニューラからの酸素吐出が継続される。【解決手段】本発明の呼吸同調器は、酸素供給部に接続された酸素供給ポートと、カニューラに接続された酸素排出ポートと、圧力センサが接続された圧力検出ポートとを有する電磁弁と、圧力センサからの信号に基づいて電磁弁を制御する制御手段と備え、電磁弁は、酸素供給ポートと酸素排出ポートとが連通した酸素供給状態と、酸素排出ポートと圧力検出ポートとが連通した酸素非供給状態とを切り換える弁体と、弁体を駆動するコイルとを有し、制御手段は、酸素非供給状態に切り換えるための電流がコイルに流れた後、酸素供給状態に切り換えるための電流が上記コイルに流れてない場合において、圧力センサからの信号を所定時間検知しなかったときに酸素非供給状態に切り換えるための電流がコイルに流れるように、電磁弁を制御する。【選択図】図8
