SYSTEM AND METHOD FOR REPLACING AIR FILTERS

摘要

A system comprising a sensor coupled to a filter having a filter type. The sensor measures pressure drop across the filter and communicates with the controller. An air handler pushes air through the filter and communicates with a controller. The controller comprises an interface connection, a memory, and a microprocessor. The interface connection receives the air flow rate of the air handler and the pressure drop across the filter. The memory stores the relationship between pressure drop and air flow rate for a filter of the same filter type when the filter is clean and when the filter is exhausted. The memory also stores the relationship between pressure drop and the life of a filter of the filter type. The processor determines the remaining life of the filter using the received and stored information. The display receives information from the controller and displays the information.

主权项

1. A system comprising:
a filter having a filter type; a sensor operable to communicate with a controller, the sensor being coupled to the filter and operable to measure a pressure drop across the filter; an air handler operable to communicate with the controller and push air through the filter at a particular air flow rate; the controller comprising:
an interface connection operable to receive first information indicating the air flow rate of the air handler and second information indicating the pressure drop across the filter;a memory operable to store:
a first relationship between pressure drop and air flow rate for the filter type when the filter is exhausted;a second relationship between pressure drop and air flow rate for the filter type when the filter is clean;a third relationship between pressure drop and remaining life for the filter type at one or more air flow rates; andan operating region defined by:
an air flow rate that is greater than a minimum air flow rate and lower than a maximum air flow rate; anda pressure drop that is lower than the pressure drop generated from the first relationship and higher than the pressure drop generated from the second relationship;a microprocessor operable to:
determine whether the first information and the second information are within the operating region; andin response to determining that the first information and the second information are within the operating region, generate a fourth information indicating the remaining life of the filter using the third relationship stored in the memory; anda display coupled to the controller and operable to display the fourth information.