Intelligent ventilating safety range hood
OwnerRobert Paul Siegelinventor
Life of this patent
Estimating the term…
Abstract
An improved ventilating range hood that drives a variable speed fan according to the state of four distinct air quality sensors: temperature, humidity, Carbon monoxide and smoke. A micro-controller is used to integrate the four signals and determine the appropriate ventilation requirement. This value is converted into a signal to drive the fan. Visual indicators are provided to display the state of each air quality factor. An audible alarm is activated if the levels remain at hazardous levels for more than a predetermined time interval after the fan has been turned on.
Claims18
An improved ventilating range hood, comprising:
- a sheet metal collecting hood, vented to the outdoors;
- a variable speed, electronically controllable fan, mounted in such a way as to draw air from a cooking area and out through said vent of said collecting hood;
- a plurality of air quality sensors capable of detecting both comfort factors and the presence of hazardous substances in the air;
- an embedded control algorithm which examines the composite output of said discrete air quality sensors, as well as, the trend information and determines from said information an instantaneous ventilation requirement, and
- a control signal, derived from said algorithm to regulate the fan speed level such that every combination of discrete air quality sensor conditions will have a unique associated fan speed level based on said ventilation requirement.
A smart range hood, comprising:
- a vent connected to said range hood and vented to the outdoors;
- a variable speed fan connected to said vent;
- a plurality of air quality sensors;
- a micro-controller, said micro-controller being adapted to examine the composite output of said air quality sensors, as well as, the trend information arising from them, and determine from said information, an instantaneous ventilation requirement;
- and
- a control signal, produced by said micro-controller to regulate the fan speed such that every combination of air quality sensor levels will have a unique associated fan speed based on said ventilation requirement.
A system that senses the air in and around a range hood for the presence of particular hazardous elements, comprising:
- a collecting hood;
- a variable speed fan;
- a series of sensors adapted to sense predetermined hazardous elements;
- a controller adapted to integrate signals from said series of sensors, as well as, the trend information arising from them, and determine from said information, an instantaneous ventilation requirement, and
- a control signal, produced by said controller to regulate the fan speed such that every combination of air quality sensor levels will have a unique associated fan speed based on said ventilation requirement.
Dependencies are inferred from the claim text.