| 摘要 |
FIELD: equipment for firefighters. ^ SUBSTANCE: mask installation with the ventilator contains the exhalation valve located on the fore part of the front cover is made to be moved towards opening position during exhalation and towards closing position during inhalation, the inhalation valve located on the fore part of the front cover is made to be moved towards closing position during exhalation and towards opening position during inhalation; the mask is equipped with the ventilator driven by the electric motor, the ventilator control sensor closely located to the exhalation valve and it determines the exhalation valve motion position during the inhalation without interacting with the exhalation valve and generates the signal; the installation comprises the warning sensor which determines the exhalation valve motion position in the cases when the pressure in the front cover is lower than the external atmospheric pressure during the air inhalation it signals about the above without interacting with the valve; the warning device works in correspondence with the signal of the warning sensor; the ventilator control sensor and warning sensor comprise the contactless sensor which monitor the exhalation valve status. ^ EFFECT: invention ensures convenience of application. ^ 3 cl, 10 dwg |
