Proposed is a variable hood apparatus. The variable hood apparatus includes a support holder fixed to a wall, a rotation holder configured to be rotatable around a vertical axis of rotation while being supported by the support holder, an arm portion supported by the rotation holder and configured to be capable of performing a three-dimensional movement, a foldable hood mounted on an end portion of the arm portion, the foldable hood being configured to be unfolded while being used and to be folded while being not used, an exhaust pipe which is connected to the foldable hood and which extends to an outside, and an exhaust mechanism configured to generate an airflow which is formed inside the exhaust pipe and which is in a direction toward the outside, thereby inducing a negative pressure in the foldable hood.

Embodiments are described for a portable range hood system. The portable range hood system can include a replaceable filter and is not connected to a duct. Alternatively, the portable range hood system can be coupled to a duct. The range hood system includes a support frame structure with wheels to make the system portable and capable of being moved to any desired spot. The range hood system includes an exhaust fan and range hood, as well as a filter container housing a filter to filter out any steam, heat, odors, and smoke, including cigarette smoke. The portable range hood system can include a lighting system and plantar box for planting plants, herbs, flowers, or anything that can grow. The portable range hood system can be moved to any location in one's home or business to filter out contaminants and cleanse the surrounding air.

Embodiments are described for a portable range hood system. The portable range hood system can include a replaceable filter and is not connected to a duct. Alternatively, the portable range hood system can be coupled to a duct. The range hood system includes a support frame structure with wheels to make the system portable and capable of being moved to any desired spot. The range hood system includes an exhaust fan and range hood, as well as a filter container housing a filter to filter out any steam, heat, odors, and smoke, including cigarette smoke. The portable range hood system can include a lighting system and plantar box for planting plants, herbs, flowers, or anything that can grow. The portable range hood system can be moved to any location in one's home or business to filter out contaminants and cleanse the surrounding air.

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 grease filter (10) has a frame (12) and a grease filter baffle assembly (14) which includes a front (30), a rear panel (32), and an air deflector assembly (34). The front panel has entrance openings (38) therethrough and a series of first bypass holes (42) therethrough. Similarly, the rear panel has a series of exit openings (46) therethrough and a series of fourth bypass holes (50) therethrough. The air deflector assembly has a repeating series of convoluted first baffle walls (56) and a repeating series of convoluted second baffle walls (58). The first baffle walls include second bypass holes (60) therethrough. The second baffle walls includes third bypass holes (62) therethrough. The combination of the front panel, first baffle walls, second baffle walls, and rear panel create a primary air flow channel (66) and a bypass air flow path (68).

A vent hood kit comprises a canopy assembly having an intake end and an outlet end, a blower housing selectively and alternatively coupled with the exhaust end of the canopy assembly in an in-line position and an external position, a blower assembly disposed within a blower housing and in communication with the intake end in both the in-line and external positions and an exhaust duct adapter of the blower housing is configured to be in communication with the intake end in both the in-line and external positions.

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.

A grease filter (10) has a frame (12) and a grease filter baffle assembly (14) which includes a front (30), a rear panel (32), and an air deflector assembly (34). The front panel has entrance openings (38) therethrough and a series of first bypass holes (42) therethrough. Similarly, the rear panel has a series of exit openings (46) therethrough and a series of fourth bypass holes (50) therethrough. The air deflector assembly has a repeating series of convoluted first baffle walls (56) and a repeating series of convoluted second baffle walls (58). The first baffle walls include second bypass holes (60) therethrough. The second baffle walls includes third bypass holes (62) therethrough. The combination of the front panel, first baffle walls, second baffle walls, and rear panel create a primary air flow channel (66) and a bypass air flow path (68).

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.

Provided is a cooking appliance that includes an oven cavity and an oven door pivotally mounted to a front surface and configured to selectively provide access to an interior of the oven cavity. A cooktop includes a heating element and an inlet of a downdraft system exposed at a top surface of the cooking appliance. An outlet is provided through which air drawn into the downdraft system through the inlet is exhausted to an ambient environment of a room in which the cooking appliance is located. An air duct system conveys air between the inlet and the outlet, and a blower draws air from the ambient environment of the cooking appliance adjacent to the cooktop into the inlet and through the air duct system to be expelled through the outlet back into the ambient environment.