Ventilation controller
AssigneeTrane International Inc.
InventorsRobert Wayne Helt, Roy Randall Crawford
Life of this patent
Estimating the term…
Abstract
A ventilation system for a building in some cases includes a main HVAC blower for moving temperature-conditioned air through the building plus a smaller ventilation blower for providing fresh air. A controller regulates the ventilation blower's speed to provide a target ventilation flow rate regardless of changes in the pressure differential between the indoor and outdoor air. To ensure that the target rate is appropriate for a particular building, the target flow rate is determined based on a ventilation setting that reflects a specified number of bedrooms and a specified amount of floor space of the building.
Claims17
A ventilation system for a building, the building defines an outdoor area and an indoor area, the ventilation system comprising:
- a ventilation blower configured to deliver air along a ventilation path from at least one of:
- the indoor area to the outdoor area, and
- the outdoor area into the indoor area;
- and
- a controller operatively coupled to the ventilation blower,
- wherein the controller comprises a manual input for selection of one of a plurality of normal modes, each of the plurality of normal modes corresponds with a target ventilation flow rate that can be associated with a number of rooms of the building and an amount of floor space of the building,
- wherein, when in a selected normal mode, the ventilation blower is configured to maintain the target ventilation flow rate of the selected normal mode in response to a change in static pressure differential between the outdoor area and the indoor area,
- wherein, the controller further comprises an alternate mode,
- wherein, in the alternate mode, one or more sensors are configured to trigger a deviation from attempting to maintain the target ventilation flow rate corresponding to the selected normal mode.
A ventilation system for a building, the building defines an outdoor area and an indoor area, the ventilation system comprising:
- a ventilation blower configured to deliver air along a ventilation path from at least one of:
- the indoor area to the outdoor area, and
- the outdoor area into the indoor area;
- and
- a controller operatively coupled to the ventilation blower,
- wherein the controller comprises a manual input for selection of one of a plurality of normal modes, each of the plurality of normal modes corresponds with a target ventilation flow rate that can be associated with a number of rooms of the building and an amount of floor space of the building,
- wherein, when in a selected normal mode, the ventilation blower is configured to maintain the target ventilation flow rate of the selected normal mode in response to a change in static pressure differential between the outdoor area and the indoor area,
- wherein the controller further comprises one or more & sensors such that the controller is capable of deactivating the ventilation blower in response to a sensed condition, thereby placing the ventilation blower into a first alternate mode and overriding the constant ventilation of air at the target ventilation flow rate of the selected normal mode.
Dependencies are inferred from the claim text.