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|1. (WO2017057030) CIRCULATION-TYPE SMOKE VENTILATOR|
|Title:||CIRCULATION-TYPE SMOKE VENTILATOR|
This circulation-type smoke ventilator delivers a predetermined gas, sucks smoke generated in a cavity of a patient 14 with the gas in the cavity to circulate and ventilate the smoke. The circulation-type smoke ventilator comprises: a pump 20 for circulating the gas; a gas delivery tube 9 that is connected to the pump 20 and delivers the gas to the cavity of the patient 14; a suction tube 8 and a pumping member 21 that are connected to the pump 20 and suck the gas in the cavity of the patient 14 from the cavity of the patient 14; a filter 211 that is installed in the pumping member 21 and filtrates the gas; a filter color detection unit 25 for monitoring a clogging state of the filter 211; a display unit 1a for displaying the clogging state of the filter 211; and a pump control unit 24 for controlling the output of the pump 20 according to the result of monitoring by the filter color detection unit 25.