Wind baffles are provided at a side discharge vent of a cabinet containing a heating, ventilation, air conditioning, and refrigeration (HVACR) system. The wind baffles include two or more baffles joined to a support frame. The baffles have a leading edge towards ambient environment surrounding of the cabinet and a trailing edge towards an interior of the cabinet, and the leading edge has a perimeter greater than a perimeter of the trailing edge. The baffles may surround each successive baffle. The baffles may be concentric The wind baffles may be located between ambient environment surrounding of the cabinet and a fan near the side discharge vent. The fan may be a variable-speed fan.

The present disclosure relates to a portable air purifier. In the portable air purifier, a fan base is disposed between a fan module including a mixed flow fan and a filter, and forms a passage that connects between the filter and the fan module while coupling the filter and the fan module. Accordingly, the portable air purifier can ensure improvement in air purification performance with no increase in the size of the portable air purifier.

A blower includes: a fan configured to generate a flow of air; a filter positioned upstream of the fan; a case covering a side surface of the filter and having a suction hole; a housing which is positioned opposite to the fan with respect to the filter, and to which the case is detachably coupled; a supporter coupled to one surface of the housing facing the filter and configured to support the filter; a light source disposed at the supporter and configured to provide light in an ultraviolet wavelength band to the fan; and a controller configured to control an operation of the light source, wherein the controller stops the operation of the light source when the case is separated from the housing or when the filter is separated from the supporter.

A bladeless fan with multiple air ducts is disclosed. The bladeless fan has a fan housing, a control system arranged in the fan housing, a blower system connected with the control system, an intermediate air duct communicating with the blower system and a rotation component connected with the control system. The intermediate air duct is provided with a side air duct at its both sides, the rotation component is connected with the side air duct to drive the side air duct to fold and unfold with the intermediate air duct as a center shaft. The side air duct is driven by the rotation component to fold and unfold with the intermediate air duct as a center shaft. The fold and unfold of the side air duct can achieve different effects, satisfy the user's requirement and improve the user experience.

A ceiling fan and a surrounding device thereof are provided. The ceiling fan includes a main body, a bracket set connected to the main body, and a surrounding device connected to the bracket set. The main body includes a main shaft, a motor, and a plurality of ceiling fan blades. The bracket set includes a plurality of brackets, and each of the brackets has one end connected to the main shaft. The surrounding device is connected to another end of each of the brackets that is relatively far away from the main shaft, and the surrounding device is roundly arranged around and spaced apart from an end of each of the ceiling fan blades that is relatively far away from the motor. The surrounding device includes at least one functional component that is configured to disinfect or sterilize air or to provide lighting.

A backflow blocking apparatus for axial fans may be provided. The apparatus may comprise a sheet. The sheet may comprise a first section and a second section. The first section may comprise a plurality of flaps cut out of and retained by the first section of the sheet. The second section may comprise a guard structure. The apparatus may further comprise a fold about which the first section and the second section are folded on one another. The guard structure may inhibit the movement of the plurality of flaps in a direction toward the guard structure when the first section and the second section are folded on one another.

A blower assembly for a powered air-purifying respirator (PAPR) assembly includes: a lower housing; an upper housing connected to the lower housing, such that the upper housing and the lower housing collectively define a first interior cavity; a filter configured to filter ambient air drawn into the blower assembly; and a fan. The upper housing and the filter define a pathway for a flow of air into the first interior cavity. The fan is positioned in the first interior cavity such that, when the fan is activated, ambient air is drawn into the blower assembly and travels along the pathway into the first interior cavity for subsequent delivery out of the blower assembly. The lower housing defines an outlet port for directing breathable air out of the blower assembly for delivery to a user (e.g., via a breathing tube interconnecting a headpiece and the outlet port).

An attic fan assembly having a cover, a housing, and a flashing. The housing having a first opening, a second opening, and a sidewall positioned between the openings. The sidewall having a plurality of apertures that can be positioned in a variety of configurations. A motor and fan blade assembly can be located within the housing. The flashing and the cover of the attic fan assembly can be removably attached to the housing. The flashing can be used to secure the attic fan assembly to the roof of a structure.

The present disclosure pertains to a therapeutic gas delivery system (8) including a pressure generator inlet apparatus (10) configured to facilitate filtering of gas drawn into the inlet (14) of the pressure generator (16) of the system. The apparatus comprises a body (12) and a support (24). The body is configured to removably engage the inlet of the pressure generator and receive a particulate filter (18). The body forms an orifice (19) configured to conduct gas that has passed through the filter to the pressure generator inlet. The support is coupled to the body at or near the orifice. The support is configured to extend from the body toward the filter and support the filter. The support is configured to resist collapse of the filter into the orifice caused by gas flowing through the filter to the pressure generator inlet.

An air conditioner according to the disclosure includes a blowing fan including a suction port, a bell mouth formed along a circumferential direction of the suction port, and a fan guard extending from an inner circumferential surface of the bell mouth and covering the suction port, wherein the fan guard includes a plurality of annular ribs arranged concentrically with a gap from a center of the fan guard corresponding to a rotation axis of the blowing fan, the plurality of annular ribs includes a first annular rib adjacent the outermost edge of the fan guard and the first annular rib is arranged to be inclined to the rotation axis in a direction corresponding to the tangent line of the bell mouth.