Detection device for air filter
First Claim
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1. A warning device for monitoring an air filter condition in an HVAC system, the filter having an upstream side and a downstream side, the device comprising:
- a sensor unit mounted adjacent the downstream of the filter, said sensor unit comprising a transmitter; and
a warning means mountable at a selected location at the upstream side of the air filter for processing a signal send by the transmitter and providing a warning signal when conditions on the downstream side of the air filter deviate from a pre-determined range.
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Abstract
A wireless sensor unit detects an out-of-range condition of an air filter in a HVAC system by sensing the air flow passing across the filter or by pressure differential across the air filter. A The sensor unit sends a signal to a receiver unit that can be positioned a distance from the sensor unit to process the signal sent by the sensor unit and provide audio and/or visual warning of the air filter condition.
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Citations
18 Claims
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1. A warning device for monitoring an air filter condition in an HVAC system, the filter having an upstream side and a downstream side, the device comprising:
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a sensor unit mounted adjacent the downstream of the filter, said sensor unit comprising a transmitter; and
a warning means mountable at a selected location at the upstream side of the air filter for processing a signal send by the transmitter and providing a warning signal when conditions on the downstream side of the air filter deviate from a pre-determined range. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A warning device for monitoring an air filter condition in an HVAC system, the filter having an upstream side and a downstream side, the device comprising:
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a sensor unit mounted adjacent the downstream of the filter, said sensor unit comprising a transmitter and a sensor member; and
a warning means mountable at a selected location at the upstream side of the air filter for providing a warning signal when the air filter becomes clogged, said warning means comprising a receiver for processing a signal sent by the transmitter and audio/visual members operationally connected to the receiver for providing audio and visual indication of the condition on the downstream side of the filter. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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Specification