×

System and method for determining filter condition

  • US 20030070544A1
  • Filed: 10/15/2002
  • Published: 04/17/2003
  • Est. Priority Date: 10/15/2001
  • Status: Abandoned Application
First Claim
Patent Images

1. A forced air filtration system comprising:

  • a housing having an air inlet and an air outlet;

    an air filter positioned in an airflow pathway between the air inlet and the air outlet;

    a blower assembly having an electric motor with an output shaft and a fan mounted for rotation with the output shaft, the blower assembly being positioned for directing air flow from the air inlet, through the air filter and out of the air outlet;

    circuitry operably connected to the electric motor, the circuitry comprising a load sensor for monitoring an electric load of the motor, the load sensor generating a load value dependent on the electric load of the motor; and

    an indicator for indicating a condition of the air filter based on the load value.

View all claims
  • 2 Assignments
Timeline View
Assignment View
    ×
    ×