Detection of clogged filter in an HVAC system
First Claim
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1. A control for an HVAC system comprising:
- an input to receive a measurement indicative of a pressure within an HVAC system to be controlled by said control, and said control being operable to determine a condition of a filter utilized with the HVAC system based upon said measurement.
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Abstract
Static pressures are measured in an HVAC system and utilized to predict the condition of a filter in the HVAC system. As the filter becomes clogged, the static pressure can be expected to increase. Changes in the static pressure are determined periodically, and utilized to predict the condition of the filter. A display provides a user with an indication of the current condition of the filter, and a recommendation to replace the filter once it reaches a predetermined condition.
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Citations
20 Claims
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1. A control for an HVAC system comprising:
an input to receive a measurement indicative of a pressure within an HVAC system to be controlled by said control, and said control being operable to determine a condition of a filter utilized with the HVAC system based upon said measurement. - View Dependent Claims (2, 3)
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4. An HVAC system comprising:
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a fan, and a supply duct for supplying air to said fan, said fan being operable to deliver air from said supply duct to an environment to be conditioned, and a filter mounted to remove impurities from said air being delivered by said fan to said environment;
a control being operable to receive an indication of pressures within said system, and determine the condition of said filter based upon said pressures; and
said pressures received by said control includes both a previous pressure and a current pressure, and the difference between said current and previous pressures being utilized to provide an indication of the condition of a filter. - View Dependent Claims (5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method of determining the condition of a filter in an HVAC system comprising the steps of:
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(1) providing an HVAC system including a filter for filtering air being delivered by said HVAC system to an environment to be conditioned;
(2) moving air through said filter and to said environment;
(3) measuring a pressure within said system, and utilizing said measured pressure to determine a current condition of said filter. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification