Air handler filter monitoring apparatus
First Claim
1. A monitoring apparatus for an air temperature control system within a building, comprising:
- means for setting a primary period of filter use to assure replacement before the filter becomes clogged;
means for setting a secondary period at the end of which the air temperature control system is automatically shut down;
means for counting out the selected primary period;
signalling means to signal the operator to replace the filter, absent replacement of the filter;
means for sensing replacement of the filter;
means for resetting the means for counting to begin the counting out the selected primary and secondary periods again upon replacement of the filter;
means for counting out a secondary period measured from the end of the primary period;
means for shutting down the system at the end of the secondary period absent replacement of the filter; and
fire detecting means within the building connected to the monitoring apparatus.
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Accused Products
Abstract
A monitoring apparatus for alerting an operator to the need to change a temperature control system filter includes a mechanism for selecting and setting a primary period of filter use to assure replacement before the filter becomes clogged; a mechanism for counting out the selected primary period; a mechanism for activating a signalling device to signal the operator to replace the filter, absent replacement of the filter; a mechanism for sensing replacement of the filter; a mechanism for resetting the mechanism for counting to begin the counting out the selected primary period again upon replacement of the filter; a mechanism for counting out a secondary period measured from the end of the primary period; a mechanism for shutting down the system at the end of the secondary period absent replacement of the filter; and a mechanism for detecting a fire within the building. The apparatus preferably additionally includes a mechanism for shutting down the temperature control system upon detection of a fire.
115 Citations
20 Claims
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1. A monitoring apparatus for an air temperature control system within a building, comprising:
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means for setting a primary period of filter use to assure replacement before the filter becomes clogged; means for setting a secondary period at the end of which the air temperature control system is automatically shut down; means for counting out the selected primary period; signalling means to signal the operator to replace the filter, absent replacement of the filter; means for sensing replacement of the filter; means for resetting the means for counting to begin the counting out the selected primary and secondary periods again upon replacement of the filter; means for counting out a secondary period measured from the end of the primary period; means for shutting down the system at the end of the secondary period absent replacement of the filter; and fire detecting means within the building connected to the monitoring apparatus. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A monitoring apparatus for alerting an operator to the need go change a filter within an air temperature control system within a building, comprising:
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means for setting a primary period of filter use; means for counting out the primary period; means for activating operator signalling means; means for sensing replacement of the filter; means for resetting the means for counting upon replacement of the filter; means for counting out a secondary period measured from the end of the primary period; means for shutting down the system at the end of the secondary period absent replacement of the filter; and fire detecting means within the building to alert building occupants to the presence of the fire and to shut down the air temperature control system.
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20. A method of monitoring an air temperature control system comprising the steps of:
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setting a primary period of filter use appropriate to assure filter replacement before the filter becomes clogged; setting a secondary period the ending of which results in automatic shut down of the air temperature control system; counting out the selected primary period; activating signalling means at the end of the primary period to signal the operator to replace the filter; counting out a secondary time period measured from the end of the primary time period; shutting down the air temperature control system in the absence of filter change; detecting a fire in the building; and shutting down the air temperature control system when fire is detected.
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Specification