Patent ID: 7073566
Filing Date: 2006-07-11
Classification: F24F,Y02B,Y10S

Abstract:
1. A defrostable ventilation apparatus, for exchanging air between the interior and exterior of a building, for transferring water moisture and sensible heat between exhaust air taken from the building and fresh air taken from the exterior ambient air for delivery to the building, and wherein air from the interior of the building is used as defrost air to defrost the ventilation apparatus, said ventilation apparatus comprising fresh air path means having a fresh air intake side and a fresh air discharge side, exhaust air path means having an exhaust air intake side and an exhaust air discharge side, an exchanger comprising said desiccant exchanger element comprising a rotary exchanger wheel configured and rotatably disposed so as to define a second air stream path and a third air stream path, said sensible heat exchanger element comprising said first and second air stream paths defining respective portions of said fresh air path means between the intake and discharge sides of said fresh air path means, said third and fourth air stream paths defining respective portions of said exhaust air path means between the intake and discharge sides of said exhaust air path means, said fresh air path means and said exhaust air path means being disposed and configured such that during a ventilation cycle, said ventilation apparatus including a rotation component for inducing rotation of said exchanger wheel through said fresh air path means and said exhaust air path means, defrost air path means for conveying defrost air to said fresh air intake side, said defrost air path means being configured to connect the exhaust air discharge side with the fresh air intake side for conveying defrost air to said fresh air intake side from said exhaust air discharge side, a damper component, said damper component being displaceable between a ventilation configuration for a ventilation cycle and a defrost configuration for a defrost cycle and wherein during a ventilation cycle, when said damper component is in said ventilation configuration, and during a defrost cycle, when said damper component is in said defrost configuration,