A fire protection nozzle includes a body having two frame arms having proximal ends connected to an outlet of the body, and distal ends, the two frame arms defining a frame arm plane, and a junction formed by the distal ends of the frame arms, the junction including a central bore and an outer wall. A deflector is mounted to the body, and includes a planar member having a mounting hole in a center of the planar member to receive the outer wall of the junction, and a plurality of slots on a periphery of the planar member. The plurality of slots includes first slots, second slots, third slots, and fourth slots.

A sprinkler assembly including a pressure regulator and a flow stop element combined in a single assembly. In one embodiment, the sprinkler includes a sprinkler body in fluid communication with a water supply to provide water to the sprinkler, a riser movably mounted in the sprinkler body and in fluid communication with the sprinkler body such that the riser rises up and out of the sprinkler body when water is provided to the sprinkler, a nozzle assembly mounted on a top end of the riser and in fluid communication with the riser; and a regulation element mounted in the riser and in contact with a portion of the nozzle assembly. The nozzle assembly holds the regulation member in an open position to allow flow of water to the nozzle assembly and to maintain a substantially constant water pressure in the nozzle assembly.

Spraying apparatus enabling large-volume generation of particles minute to a Brownian-motion engendering level. The spraying apparatus includes an atomization tank, an atomizing device, a blower, an atomization unit furnished with a liquid-level sensor for measuring liquid level in the atomization tank, a tank unit for supplying liquid formulation to the atomization tank, and a control unit for controlling supply of the liquid formulation from the tank unit to the atomization tank. If the liquid level measured by the liquid-level sensor falls below a predetermined first level h.sub.1, the control unit starts supply of the liquid formulation from the tank unit to the atomization tank, and if the liquid level measured by the liquid-level sensor reaches a predetermined second level h.sub.2 higher than the first level h.sub.1, the control unit halts supply of the liquid formulation from the tank unit to the atomization tank.

A fire protection nozzle includes a body having two frame arms having proximal ends connected to an outlet of the body, and distal ends, the two frame arms defining a frame arm plane, and a junction formed by the distal ends of the frame arms, the junction including a central bore and an outer wall. A deflector is mounted to the body, and includes a planar member having a mounting hole in a center of the planar member to receive the outer wall of the junction, and a plurality of slots on a periphery of the planar member. The plurality of slots includes first slots, second slots, third slots, and fourth slots.

Afforded is a spray apparatus that enables the large-volume generation of fine particles having particle diameters minute to a level that can give rise to Brownian motion. A spray apparatus of the present invention is furnished with: an atomization tank 11; an atomizing device 12; a blower 13 that blows air through a blow port 11b; and send-out port 11c; a first baffle plate 14a and a second baffle plate 14b, connected to an inner side of a top panel of the atomization tank. The first baffle plate 14a is furnished with a first edge piece 14ae disposed spaced apart at a predetermined spacing from an inner face of the atomization tank 11 along one widthwise end thereof, and the blow port 11b is arranged to the one widthwise end of a connection piece 14ac between the first baffle plate 14a and the atomization tank 11. The second baffle plate 14b is furnished with a second edge piece 14be disposed spaced apart at a predetermined spacing from the inner face of the atomization tank 11 along the other widthwise end thereof, and the blow port 11c is arranged to the other widthwise end of a connection piece 14bc between the second baffle plate 14b and the atomization tank 11.

Afforded is a spraying apparatus that enables the large-volume generation of fine particles having particle diameters minute to a level that can give rise to Brownian motion. A spraying apparatus of the present invention is furnished with: an atomization tank 11 enabled for storing a liquid formulation; an atomizing device 12 being ultrasonic vibration elements arranged in the atomization tank interior, for atomizing the liquid formulation to generate fine particles; a blower 13 furnished with a blower element enabled for maintaining predetermined rpm, for blasting into the atomization tank interior, through a blow port 11b provided in the atomization tank, conveyance air that is for conveying the fine particles of the liquid formulation; a send-out port 11c, provided in the atomization tank, through which the fine particles are sent out together with the conveyance air; and a baffle plate 14a arranged in the atomization tank interior; wherein with one end part of the baffle plate 14a being spaced apart at a predetermined spacing from the inner surface of the atomization tank, the other end part is connected to the inner side of the atomization tank, and meanwhile, the baffle plate 14a is arranged so as to receive, at a surface on one side thereof, conveyance air through the blow port, and to receive, at a surface on the other side thereof, liquid columns of the liquid formulation, generated by the ultrasonic vibration elements.

A nozzle for an atomizer includes a plate, a piezoelectric actuator, a body, and a connector. The plate defines an aperture. The actuator is configured to oscillate the plate. The body supports the plate. The connector is configured to reversibly mount the body to the atomizer in a first orientation and in a second orientation. In the first orientation, fluid exits the nozzle along a first axial direction through the aperture. In the second orientation, fluid exits the nozzle along an opposite axial direction through the aperture.

A sensor-cleaning apparatus includes an upper piece, a lower piece fixed to the upper piece, a plurality of inserts inserted into the upper piece, and a plurality of nozzles. The upper piece and the lower piece form a tubular segment that is elongated along an arc of a circle and encloses a chamber. Each nozzle is formed of the upper piece and one of the inserts. Each nozzle includes a deflection surface and a tunnel from the chamber to the deflection surface, and each tunnel is partially formed of the upper piece and partially formed of the respective insert.

Afforded is a spraying apparatus that enables the large-volume generation of fine particles having particle diameters minute to a level that can give rise to Brownian motion. A spraying apparatus of the present invention is furnished with: an atomization tank 11 enabled for storing a liquid formulation; an atomizing device 12 being ultrasonic vibration elements arranged in the atomization tank interior, for atomizing the liquid formulation to generate fine particles; a blower 13 furnished with a blower element enabled for maintaining predetermined rpm, for blasting into the atomization tank interior, through a blow port 11b provided in a top panel of the atomization tank, conveyance air that is for conveying the fine particles of the liquid formulation; a send-out port 11c, provided in the atomization tank, through which the fine particles are sent out together with the conveyance air; and a baffle plate 14a arranged in the atomization tank interior; wherein the baffle plate 14a is disposed above the ultrasonic vibration elements, and underneath the blow port, in an orientation blocking liquid columns produced by the ultrasonic vibration elements, and conveyance air supplied through the blow port.

Silencing and separation in a cold-air, essential-oil, diffuser apparatus and method pass flow through a channel having comparatively high aspect ratios of length to thickness and width to thickness. Curved, tapered, non-parallel, and quasi random surfaces reduce probability and power of resonant frequencies. Offsetting flow through a channel is followed by impingement against an obstructing surface, redirection elsewhere within a drift (separation) chamber, and exiting through a smaller, and differently oriented exit port. Silencing is improved by changes of cross-sectional area creating high-pass and low pass acoustic filters, changes of direction, and absorption of acoustic energy in fluid-droplet-laden air.