The present invention discloses a safe and comfortable 
breathing assisting device for a 
respiratory medicine department. The device comprises a shell, a fixing cylinder, an air outlet 
pipe, a rotating rod, a liquid box and a water outlet 
pipe, a main shaft is connected to the upper portion of the inner side of the shell through a bearing, the air outlet 
pipe penetrates through the right side of the fixing cylinder, a fixing frame is clamped to the outer side of the air outlet pipe, a 
bevel gear set is fixed to the outer side of the rotating rod, an air bag is arranged in the shell, a water pump is installed at the bottom of the inner side of the liquid box, a 
metal sleeve is connected to the outer side of the left end above the water outlet pipe through a bearing, and a collecting 
bottle is in threaded connection to the upper portion of the left side of the shell. The safe and comfortable 
breathing assisting device is provided with the spray head, air 
disinfectant liquid towards the inner side is introduced into the 
metal sleeve, the inner pipe and the inner side of the spray head from the water outlet pipe through the water pump, and a 
water wheel in the 
metal sleeve is matched with the pressure generated when the 
disinfectant enters to drive the metal sleeve, the inner pipe and the spray head to rotate at the same time; and therefore, when the spray head rotates, the air 
disinfectant in the inner pipe can be effectively and uniformly sprayed out to disinfect the air at the left part.