Patent ID: 7685834
Filing Date: 2010-03-30
Classification: F24F

Abstract:
1. A refrigerant system for conditioning air for a comfort zone, the refrigerant system comprising: an enclosure defining an upstream air passageway receiving air from the comfort zone, a downstream air passageway releasing air to the comfort zone, and an intermediate air passageway between the upstream air passageway and the downstream air passageway, wherein the air recirculates sequentially through the upstream air passageway, the intermediate air passageway, and the downstream air passageway; a cooling coil disposed in the enclosure; a source associated with the cooling coil and providing a chilled fluid thereto; a blower in a position to force the air from the downstream air passageway into the comfort zone; a desiccant wheel absorbing moisture from the air passing from the intermediate air passageway to the downstream air passageway and simultaneously releasing moisture to the air passing from the upstream air passageway to the intermediate air passageway; and a controller connected to selectively start and stop the source and selectively energize and de-energize the desiccant wheel for rotation, wherein the controller upon stopping the source energizes the desiccant wheel for a predetermined limited period, whereby the desiccant wheel during the predetermined limited period continues to provide cooling and/or dehumidification after the source stops.