Patent ID: 7594539

Claim:
A heat exchange type ventilator comprising: an exhaust-air coupling section communicating with outdoors via a duct for forming an exhaust-air channel and coupled to a lateral side of the ventilator; a supply-air coupling section communicating with outdoors via a duct for forming a supply-air channel and coupled to a lateral side of the ventilator; and a ventilating unit having a box-like shape and including an exhaust-air outlet for sucking stale interior air through an opening disposed on an underside of the ventilating unit and a supply-air inlet for drawing fresh outside air into a room, the ventilating unit comprising: a motor for driving an exhaust-air fan and a supply-air fan; a heat exchanger for recovering exhausted heat between the interior air sucked through the exhaust-air outlet and the fresh outdoor air drawn in; a cut-off damper for cutting off a flow of the supply-air in the supply-air channel running from the supply-air coupling section to the supply-air inlet; and supply-air temperature sensing means for sensing a temperature of the outside air drawn in, wherein the cut-off damper cuts off the flow of the supply-air based on a signal issued from the supply-air temperature sensing means, and the motor reduces a speed of the exhaust-air fan based on the signal issued from the supply-air temperature sensing means to reduce a volume of the exhaust air exhausted by the exhaust-air fan.