×

Systems and computer program products for measuring airflow rates in heating, ventilating, and air conditioning (HVAC) ducts and HVAC systems including the same

  • US 10,161,774 B2
  • Filed: 11/22/2011
  • Issued: 12/25/2018
  • Est. Priority Date: 11/23/2010
  • Status: Active Grant
First Claim
Patent Images

1. A heating, ventilating and air conditioning (HVAC) system, the system comprising:

  • at least one duct;

    a high resolution airflow measurement system positioned in the duct, the high resolution airflow measurement system including thermistor pairs in a first plurality of cells in the duct, each pair including a self-heated thermistor and a reference thermistor and the high resolution system being configured to be removed from the duct and replaced by a low resolution airflow measurement system, the low resolution airflow measurement system including thermistor pairs in a second plurality of cells in the duct, the second plurality being less than the first plurality;

    a power module configured to regulate a variable amount of power delivered to the self-heated thermistor;

    an analog to digital convertor (ADC) configured to receive a non-linear output of the self-heated thermistor; and

    a calculation module configured to receive an output of the ADC and calculate data used to control air flow in the HVAC system.

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