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.

Disclosed is an internal circulation type lampblack purifier. The internal circulation type lampblack purifier comprises a shell, an air inlet, an air outlet, an air inlet channel, an air outlet channel, a fan device, a mechanical grease separator, a gas purification device and a cooling device, wherein the air inlet and the air outlet are arranged on the shell; the mechanical grease separator is arranged at the air inlet or in the air inlet channel; and the cooling device is arranged at the air outlet and comprises a water supply pipe, water spray guide plates, a water mist baffle plate, a spray pipe and a water receiving tank, the spray pipe communicates with the water supply pipe, spray nozzles are arranged on the spray pipe and face the water spray guide plates, the water receiving tank is located below the water spray guide plates, and the water mist baffle plate is provided with blades at certain gaps. According to the internal circulation type lampblack purifier, the cooling device is arranged, so that the temperature of discharged gas is effectively reduced, high-temperature water vapor in the discharged gas is eliminated, and the influence of the high-temperature water vapor on the indoor environment is prevented.

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 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.

Examples are disclosed that relate to ventilation systems for a cooking appliance and methods for cleaning a ventilation system for a cooking appliance. In one example, a method for cleaning a ventilation system for a cooking appliance comprises controlling, via an electronic controller, an introduction of a solution configured to disintegrate deposits within the ventilation system into a liquid delivery system of the ventilation system. The solution is distributed via one or more conduits of the liquid delivery system to one or more liquid delivery outlets of the ventilation system. The solution is applied to one or more surfaces within the ventilation system using the one or more liquid delivery outlets of the ventilation system.

A method, a system, and a wastewater treatment system includes a biological treatment zone for biologically treating fat, oil and grease by adding a culture of microorganisms for partial biodegradation of the fat, oil and grease and/or breaking down the fat, oil and grease. The wastewater system includes a control system, an air injection and distribution system for improving and controlling the biological treatment process and at least one sensor. The at least one sensor may be configured to obtain sensor data, audio data and/or image data, and the control system may be configured to determine the thickness of a layer of fat, oil and grease on the surface of the biological treatment zone.

A range hood having an internal circulation filter for cooking fumes comprises a back cover (1). A suction block (2) is provided inside the back cover (1), and a blower (3) provided inside the suction block (2) is used to achieve adsorption of cooking fumes. The back cover (1) is further provided with a filtration device (4) in communication with an air outlet of the blower (3), and used to filter the cooking fumes. An internal circulation block (5) is connected and sealed to an air outlet end of the filtration device (4), so as to achieve internal circulation of filtered gasses. The range hood having an internal circulation filter for cooking fumes features a simple structure, and extends the service life of a range hood. The invention effectively absorbs excess heat in a kitchen, thereby lowering the internal ambient temperature of the kitchen.

A commercial cooking equipment exhaust hood system includes a hood structure including an inlet opening to an exhaust flow path through the hood. A filter unit is positioned along the exhaust flow path. An electrostatic precipitator unit is downstream of the filter unit. The electrostatic precipitator includes an ionizing section upstream of a collecting section. The ionizing section includes a plurality of ionizing flow paths having side profile patterns that vary in width between at least one wide section and at least one narrow section. The collecting section includes a plurality of collecting flow paths with side profile patterns of substantially uniform width and a repeating undulating side profile pattern. A UV light source may also be provided within the hood, with a controller operatively connected to control the UV light source via a dimmer to enable selective production various UV levels.

An example automatic cooking range cleaning system may include a nozzle coupled to a conduit and arranged to spray a first zone of a cooking range exhaust system, a pump configured to provide a cleaning solution to a supply line, and a control box connected to the pump via a supply line. The control box may include a controller and an electronically-controlled valve configured to selectively couple the supply line to the conduit. The controller may be configured to, in response to receipt of a start signal to initiate a cleaning operation, cause the cleaning solution comprising a mixture of detergent and water having a ratio based on a target mixing ratio to be provided to the supply line, and cause the electronically-controlled valve to open to facilitate provision of the cleaning solution to the nozzle via the conduit for a predetermined period of time.

An exhaust hood system can include an intake located within a building, an output, a duct positioned between the intake and the output, the duct fluidly connecting the intake and the output together, a filter positioned within the duct, the filter emitting a liquid within a portion of the duct, a drain in fluid communication with the filter, and a chamber comprising a photosynthetic agent or a fungal agent. The chamber can be in fluid communication with the drain.