US 2021/0199329 A9 · Heating, Ventilating, Air Conditioning Fan-On Correction

Abstract

A Heating, Ventilating Air Conditioning (HVAC) fan control method comprising: detecting a HVAC fan is controlled by a fan-on setting, determining a HVAC fan-on operating time (F6) is greater than a Threshold Fan-on Time (TFT); and performing at least one action selected from the group consisting of: providing a HVAC fan-on alarm message, overriding the fan-on setting, and turning off the HVAC fan. The method may also include turning off an ultraviolet lamp after the HVAC fan is turned off, and turning on the ultraviolet lamp after the HVAC fan is turned on. Turning off the HVAC fan comprises: turning off the HVAC fan for a variable duration, skipping a scheduled fan-on setting, turning off the HVAC fan based on a call for cooling/heating, turning off the HVAC fan based on an indoor air quality measurement, and turning off the HVAC fan based on a geofencing or occupancy sensor signal.

Claims20

Dependent claims

A Heating, Ventilating, Air Conditioning (HVAC) fan control method, the method comprising:

detecting a HVAC fan is controlled by a fan-on setting or a fan-on schedule;
determining a HVAC fan-on duration (F6) is greater than a Threshold Fan-on Time (TFT);
and
performing at least one action selected from the group consisting of:
providing at least one fan-on alarm message,
overriding the fan-on setting or the fan-on schedule, and
turning off the HVAC fan,

4 more elements

A Heating, Ventilating, Air Conditioning (HVAC) fan control method, the method comprising:

detecting a HVAC fan is controlled by a fan-on setting or a fan-on schedule;
determining a HVAC fan-on duration (F6) is greater than a Threshold Fan-on Time (TFT);
and
performing at least one action selected from the group consisting of:
providing at least one fan-on alarm message,
superseding the fan-on setting or the fan-on schedule, and
turning off the HVAC fan.

4 more elements

A Heating, Ventilating, Air Conditioning (HVAC) fan control method, the method comprising:

detecting a HVAC fan is controlled by a fan-on setting or a fan-on schedule;
determining a HVAC fan-on duration (F6) is greater than a Threshold Fan-on Time (TFT);
and
performing at least one action selected from the group consisting of:
providing a fan-on alarm message,
modifying the fan-on setting or the fan-on schedule, and
turning off the HVAC fan.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application

16/909,752Filed 23 Jun 2020

Priority

31 May 2016

Published

1 Jul 2021

Term ends

Not estimatedThe source records don’t support an estimate.

Classification25 codes

F24F 11/46
For purposes related to the operation of the system, e.g. for safety or monitoring: improving electric energy efficiency or saving
F24F 8/22
By sterilisation: using UV light
F24F 11/52
Characterised by user interfaces or communication: indication arrangements, e.g. displays
F24F 11/56
Characterised by user interfaces or communication: remote control

Family

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