An electrostatic filter unit for an air cleaning device includes an ionization unit for charging a particle contained in an air flow, a separation unit arranged downstream of the ionization unit in a direction of flow of the air, with the separation unit including at least two collecting electrodes which are air-permeable, and a protection element for at least one element of the ionization unit.

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.

A kitchen exhaust system includes a hood, a vapor passage, a cold air induction system configured to produce cold air, and a mixing chamber. The hood is configured to collect grease-laden vapors from a cooking area. The mixing chamber is fluidly coupled to the hood through the vapor passage to receive the grease-laden vapors from the cooking area and fluidly coupled to cold air induction system to receive the cold air produced by the cold air induction system. The mixing chamber has one or more walls, a grease drain, and a vapor exhaust. The one or more walls are positioned in the mixing chamber create turbulence of air flow formed from the cold air and the grease-laden vapors. The cold air and the turbulence of the air flow separate at least a portion of the grease from the grease-laden vapors.

A kitchen exhaust system includes a hood, a vapor passage, a cold air induction system configured to produce cold air, and a mixing chamber. The hood is configured to collect grease-laden vapors from a cooking area. The mixing chamber is fluidly coupled to the hood through the vapor passage to receive the grease-laden vapors from the cooking area and fluidly coupled to cold air induction system to receive the cold air produced by the cold air induction system. The mixing chamber has one or more walls, a grease drain, and a vapor exhaust. The one or more walls are positioned in the mixing chamber create turbulence of air flow formed from the cold air and the grease-laden vapors. The cold air and the turbulence of the air flow separate at least a portion of the grease from the grease-laden vapors.

A heat exchanger (10′) arranged to exchange energy with a flow (F) of air, said heat exchanger (10′) comprises a housing (11) arranged to receive said flow (F) of air through a first end (11a) and at least one conduit arrangement (12) arranged inside said housing (11) whereby said flow (F) of air will pass along the at least one conduit 5 arrangement (12) when said flow (F) of air is received by said housing (11), wherein the heat exchanger (10′) is arranged to be used in a a system where air is carrying particles, such as a marine environment, a kitchen system or a dryer system.

A ventilation hood includes a main frame which faces an appliance accessible from a front of the appliance, the main frame defining a through-hole passing through the main frame, a motor module on the main frame and configured to suck in air through the through-hole, the motor module including a duct, a motor having an axis, and an exhaust fan driven by the motor and defining a blowing direction perpendicular to the axis of the motor, and a controller configured to control operation of the ventilation hood and a rotation velocity of the exhaust fan. The axis of the motor is in a direction from the front of the appliance to a rear of the appliance which is opposite to the front. The controller is on the main frame and at a front of the duct which corresponds to the front of the appliance.

A method and system to treat emissions (e.g., smoke, particulate, odor, grease) employs a nanosecond high voltage pulse generator, a transient pulsed plasma reactor, and a DC voltage source that supplies a DC bias voltage, preferably a negative DC bias voltage to a conductor of the transient pulsed plasma reactor. The system is used in a scheme that substantially reduces at least particulate matter in emissions streams, for example emissions streams produced during cooking, for instance in commercial charbroiling processes (e.g., cooking of hamburger meat), or from operation of internal combustion engines. Both a reduction in the size distribution and total particulate mass is achieved using the method and system described herein.

A method and system to treat emissions (e.g., smoke, particulate, odor, grease) employs a nanosecond high voltage pulse generator, a transient pulsed plasma reactor, and a DC voltage source that supplies a DC bias voltage, preferably a negative DC bias voltage to a conductor of the transient pulsed plasma reactor. The system is used in a scheme that substantially reduces at least particulate matter in emissions streams, for example emissions streams produced during cooking, for instance in commercial charbroiling processes (e.g., cooking of hamburger meat), or from operation of internal combustion engines. Both a reduction in the size distribution and total particulate mass is achieved using the method and system described herein.

A kitchen hood has a first housing and a second housing that slides into and out of the first housing to adjust a length of the kitchen hood. The first housing has a fan to suction air, an outlet, and an air quality sensor assembly to continuously detect air quality in a kitchen. The second housing has an inlet and suction grill through which air is suctioned, a steam cleaning assembly to automatically steam clean an interior of the kitchen hood, and a height sensing assembly to sense a height of cookware seated on a cooktop surface below the second housing. The kitchen hood may be lengthened or shortened based on the sensed height of the cookware, and a speed of the fan and the height of the kitchen hood may be automatically adjusted based on detections by the air quality sensor assembly.