A knock detection device includes a proximity sensor, at least one sound sensor, and a signal processing unit. The proximity sensor and the sound sensor are respectively electrically connected to the signal processing unit. The signal processing unit receives and/or processes the signal of the sound sensor according to the signal of the proximity sensor. A household appliance includes the knock detection device. The knock detection device is disposed inside the household appliance on the back side of a panel provided for knocking by a user.

A range hood includes a hood canopy configured to collect and exhaust effluents from a cook top and a hood skirt coupled to an outer edge of the hood canopy. The hood skirt has a front surface that faces outwardly away from an interior effluent-collection region defined by the hood canopy and the hood skirt. A removable trim is coupled to the hood skirt.

The present invention refers to a method to control a cooking device, wherein the cooking device comprises a control unit to perform a task on the cooking device by executing control commands, a communication unit, to wirelessly connect to an external device to establish a communication between the external device and the control unit, wherein the external device is able to send control commands to the control unit of the cooking device. It is provided, according to the present invention, for a user to send control commands from the external device only after the user activated a mode on the cooking device to allow the receiving of an external control command, wherein said mode is deactivated after receiving the external control command, and that said mode is deactivated without receiving the external control command if a time limit passes, or by an interaction of the user on a user interface of the cooking device.

A hood apparatus for a cooking device includes at least one temperature sensor arranged in a direction of a cooking device including a plurality of burners, a communication interface to perform communication with the cooking device, a driving device configured to adjust a sensing direction of the at least one temperature sensor, and a processor configured to identify at least one burner being driven from among the plurality of burners, control the driving device to adjust the sensing direction of the at least one temperature sensor so that the at least one temperature sensor faces a position of the identified at least one burner, and control the communication interface to transmit a sensing result of the at least one temperature sensor to the cooking device.

The invention relates to a vapour extraction device for extracting cooking vapours downward. The vapour extraction device comprises a fan apparatus for sucking in the cooking vapours having a fan impeller which can be driven in rotation, a fan motor for supplying a drive torque, and a releasable fan coupling for transmitting the drive torque to the fan impeller.

According to an aspect of the present disclosure, a ventilation system includes at least one user directed component and a plurality of sensors configured to detect a plurality of control gestures within a gesture field designated for presentation of control gestures by a user. The ventilation system may further be configured such that a control gesture of the plurality of control gestures is presented within the gesture field for detection of said control gesture by the plurality of sensors, and the plurality of sensors recognizes the control gesture as corresponding to an operation of the at least one user directed component. The ventilation system may still further include a controller for polling the plurality of sensors and converting a recognized control gesture to a command signal for operating the at least one user directed component.

An indoor pollution prevention system includes a plurality of gas detection modules, one or more intelligent control-driving processing devices, one or more gas-exchange processing devices, and one or more indoor cleaning and filtration devices. The gas-exchange processing device includes one or more flow-guiding component and a cleaning and filtration assembly. The intelligent control-driving processing device controls the operation of the indoor cleaning and filtration device in real-time under a surveillance condition, therefore the air pollution source in the indoor space passes through the indoor cleaning and filtration device, allowing the air pollution source in the indoor space to be filtered and exchanged to become a clean air.

A method and system to treat cooking emissions (e.g., smoke) employs a nanosecond high voltage pulse generator and a transient pulsed plasma reactor. The system is used in a scheme that substantially reduces particulate matter produced in commercial charbroiling processes (e.g., cooking of hamburger meat). Both a reduction in the size distribution and total particulate mass is achieved using the method and system described herein.

A sensor-enabled range hood can be used with a cooking appliance. Information from multiple sensors can be used to determine whether abnormal or hazardous conditions are present, such as when unattended cooking is detected. A local indication or a remote notification can be generated in response to one or more conditions. A control signal to control a cooking appliance or range hood can be issued in response to one or more conditions. A remediation signal to address an actual fire present can be issued, such as to trigger fire remediation.

The present invention discloses a contactless control device for a range hood and a control method thereof. The contactless control device comprises two sets of infrared gesture sensing devices disposed on the housing of the range hood, and a detected signal analysis device. Each set of infrared gesture sensing devices comprises one infrared receiving device and at least one infrared transmitting device. The distance L between two infrared receiving devices meets the following condition: H*tan(θ)+H*tan(β)+W_min<L<H*tan(θ)+H*tan(β)+W_max. It is unnecessary to control the user's gesture sensing distance according to the intensity of the infrared transmitted signals. In this way, it is convenient to adjust the intensity of the infrared transmitted signals, and the infrared receiving device can better detect infrared signals.