Method of dehumidifying an indoor space using outdoor air

a technology of dehumidification and indoor space, applied in the field of space conditioning systems, can solve problems such as lack of supply of heat supply air
US20060273183A1Inactive Publication Date: 2006-12-07LENNOX MFG
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
LENNOX MFG
Publication Date
2006-12-07
Estimated Expiration
Not applicable · inactive patent

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Abstract

A method for dehumidifying air in an indoor space using outside air is comprised of the steps of: sensing whether there is a demand for dehumidification in the space; in response to a demand for dehumidification, determining whether outdoor air is suitable for dehumidification of the space; if the outdoor air is determined to be suitable, admitting outdoor air into the air supplied to the space; and selectively temperature conditioning the supply air in accordance with a predetermined temperature condition therefor. The method is disabled in response to a demand for heating or sensible cooling in the space. Further, the ratio of outdoor air to return air in the supply air is kept relatively constant, irrespective of whether the predetermined temperature condition is satisfied.
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Description

TECHNICAL FIELD

[0001] This invention relates generally to space conditioning systems for conditioning the temperature and humidity of an indoor space and in particular to a method of dehumidifying the space using outdoor air. BACKGROUND ART

[0002] Central air conditioning systems, including systems that use a vapor compression refrigerant to cool air circulated to an indoor space, often require relatively accurate control of humidity in the air within the space. In one such system, as described in U.S. Pat. No. 6,644,049, a reheat heat exchanger is positioned downstream of the system evaporator to reheat air that is cooled and dehumidified by the evaporator. Therefore, dehumidified air can be delivered to the space without appreciably cooling the space.

[0003] In the system described in U.S. Pat. No. 6,644,049, outdoor air is not admitted into the system in response to a demand for dehumidification in the space. In the air conditioning system described in U.S. Pat. No. 6,427,461, o...

Claims

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