An aspirator air vent valve may include an air vent valve body coupled with an aspirator body and a pipe fitting. The air vent valve body may include an air vent valve air channel defined by an inner wall of the air vent valve body and disposed between the aspirator body and the pipe fitting. The aspirator air vent valve may further include a vent passage defined by a first vent wall and a second vent wall and disposed between an outer wall and the inner wall of the air vent valve body, wherein the vent passage is in fluid communication with the air vent valve air channel. The aspirator air vent valve may further include a plunger coupled with the air vent valve body.

An aspirator air vent valve may include an air vent valve body coupled with an aspirator body and a pipe fitting. The air vent valve body may include an air vent valve air channel defined by an inner wall of the air vent valve body and disposed between the aspirator body and the pipe fitting. The aspirator air vent valve may further include a vent passage defined by a first vent wall and a second vent wall and disposed between an outer wall and the inner wall of the air vent valve body, wherein the vent passage is in fluid communication with the air vent valve air channel. The aspirator air vent valve may further include a plunger coupled with the air vent valve body.

A pneumatically actuated vacuum pump is disclosed. The pneumatically actuated vacuum pump includes a body. The body defines at least two converging motive sections each having an outlet end, at least two diverging discharge sections each having an inlet end, and at least one Venturi gap. The Venturi gap is located between the outlet ends of the at least two converging motive sections and the inlet ends of the at least two diverging discharge sections.

A temperature control system comprises an enclosure having an intake aperture and an exhaust aperture. An air amplifier disposed inside the enclosure. A gas supply line is connected to the air amplifier through the intake aperture. The gas supply line supplies a first flow of gas to the air amplifier. The air amplifier amplifies the first flow of gas to a second flow of gas inside the enclosure. The second flow of gas exits through the exhaust aperture.

A fan is described with a first conveying element, fluidly connectable with a source of a primary air flow and defining a first passage for the primary air flow; a first mouth receiving a first aliquot of the primary air flow from the first passage; a first Coanda surface onto which the first mouth directs the first aliquot; and a first opening fluidly connected with the first mouth and crossable by the first aliquot coming of the first mouth and a secondary air flow; the fan comprises a second conveying element, fluidly connected with the first conveying element and defining internally a second passage for a second aliquot of the primary air flow, and comprises: a second mouth receiving the second aliquot from the second passage and a second Coanda surface onto which the second mouth directs the second aliquot.

A fan is described with a first conveying element, fluidly connectable with a source of a primary air flow and defining a first passage for the primary air flow; a first mouth receiving a first aliquot of the primary air flow from the first passage; a first Coanda surface onto which the first mouth directs the first aliquot; and a first opening fluidly connected with the first mouth and crossable by the first aliquot coming of the first mouth and a secondary air flow; the fan comprises a second conveying element, fluidly connected with the first conveying element and defining internally a second passage for a second aliquot of the primary air flow, and comprises: a second mouth receiving the second aliquot from the second passage and a second Coanda surface onto which the second mouth directs the second aliquot.

A convergent nozzle is in a flow path from a liquid inlet of the ejector and a liquid outlet of the ejector. A convergent end of the convergent nozzle has a smaller cross-sectional area than an inlet of the convergent nozzle. The convergent nozzle is sized to increase a velocity of the liquid to supersonic velocities and decrease a pressure of the liquid. A low pressure housing includes a low pressure inlet into an interior of the low pressure housing. A convergent-divergent nozzle includes a mixed liquid inlet in fluid communication to receive fluid from the convergent nozzle and the low pressure housing.

A ceiling fan includes an annular nozzle having an inner wall, an outer wall extending about the inner wall, an air inlet for receiving an air flow, an air outlet for emitting the air flow, and an interior passage located between the inner and outer wall for conveying the air flow to the air outlet. The inner wall defines a bore through which air from outside the nozzle is drawn by the air flow emitted from the air outlet. A support assembly supports the nozzle on a ceiling and includes a ceiling mount for mounting the ceiling fan on a ceiling, an arm having a first end connected to the ceiling mount, and a body connected to a second end of the arm and the annular nozzle. The body is pivotable relative to the arm about a pivot axis to move the annular nozzle between a raised and lowered position.

A ceiling fan includes an annular nozzle having an inner wall, an outer wall extending about the inner wall, an air inlet for receiving an air flow, an air outlet for emitting the air flow, and an interior passage located between the inner and outer wall for conveying the air flow to the air outlet. The inner wall defines a bore through which air from outside the nozzle is drawn by the air flow emitted from the air outlet. A support assembly supports the nozzle on a ceiling and includes a ceiling mount for mounting the ceiling fan on a ceiling, an arm having a first end connected to the ceiling mount, and a body connected to a second end of the arm and the annular nozzle. The body is pivotable relative to the arm about a pivot axis to move the annular nozzle between a raised and lowered position.

Humidifying apparatus includes a chamber, and a water tank for supplying water to the chamber. A baffle located within the chamber divides the chamber into an inlet section and an outlet section, and guides water received from the water tank along the inlet section to the outlet section. An air flow is conveyed over water stored in the outlet section of the chamber and is emitted from the apparatus. Water within both the inlet section and the outlet section of the chamber is irradiated with ultraviolet radiation. The water within the outlet section is atomized by a transducer to humidify the air flow.