Oy Halton Group Ltd. (Helsinki, FI)

A fire safety system that is commercial grade is designed to control the levels of exhaust and to respond to fires. Systems can be used to notify of the looming threat of fire or dangers. Embodiments use probabilistic estimates to create alarms that can be cancelled. Embodiments make use of classifiers which can make use of alarm cancellations as a mechanism to facilitate supervised learning.

Systems for fire suppression that are placed on cook-stoves and ranges include those that deliver the fire-repellant to the cooking surface. This is done when the temperature in the hood or plenum (or ductwork) signals that a fire has been ignited. There are fire suppression systems that determine a temperature that is absolute within the hood or ductwork. When this temperature is exceeded it triggers an alarm and releases fire retardant. This method doesn’t take into account changes in exhaust temperature or the possibility of a flare-up due to regular cooking. Fire suppression systems can only detect fires that have already started. There’s a requirement within the current state of the art for improved methods for detection of fires as well as prevention and for systems that can respond faster times.

Rules-based or network-based methods utilize multiple sensor outputs to create an indicator of status that can be utilized to regulate exhaust flow and fire suppression. In some embodiments, at minimum one sensor type that generates a predefined signal is used to detect fire condition and cooking status of the appliance, the predefined signal being applied to a controller which differentiates, responsively the predefined signal in conjunction with other signals and at minimum two cooking states each of which corresponds to at least two flow rates for exhaust that the controller can implement in response to the controller’s differentiation of the two states. The predefined signal issimultaneously utilized to distinguish the fire state, in response to the differentiation of which the controller is activated by the fire suppression mechanism, like a water spray or chemical fire extinguisher.

The description below, when taken in conjunction with the accompanying illustrations, will reveal the objects and benefits of the disclosed embodiments matter.

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