| 摘要 |
A ventilation device to control the flow of air into and out of a building comprises an inner panel 2 located on an interior side of the building, an outer panel 5 located on an exterior side of the building, air vents 1,6,7 through the inner 2 and outer 5 panels each being opened and closed by a damper to permit air to pass from the interior to the exterior of the building. A screen (partition) is located between the inner 2 and outer 5 panels thereby defining a plurality of channels for the passage of the air. During cold periods (i.e. winter), the combination of opened air vents 1, 6 and two air channels creates a U-shaped movement of the air flow through the device that may be heated via a heat exchanger 3 that is heated by absorbing radiated heat. During warm periods (i.e. summer), the combination of opened air vents 7, 6 and only one of the air channels creates a Z-shaped movement of the air flow through the device that by-passes the heat exchanger 3. The screen 8 may be moved to affect the amount of ventilation. Heat exchanger 3 may be made of an air permeable porous material for reducing noise and function as a filter to clean the air from mechanical impurities. The device may function independently or together with a window.
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