Abstract: Provided is a spray nozzle configured so that the angle of spray does not change even if the flow rate of liquid is adjusted largely. A circular conical primary hole narrowing toward the discharge-side front end is provided in a communicating manner at the discharge-side center of a primary flow passage extending along the center axis of a nozzle body, and a pair of secondary holes is provided on both sides of the primary hole in the width direction so as to communicate with the primary flow passage and the primary hole. The secondary holes are formed in an elongated shape, and portions of the long sides of the secondary holes on both sides, the portions facing each other across the primary hole, and both side portions of the primary hole are connected.

Abstract: Provided is a pest control device with which it is possible to reliably exterminate pests in a cultivation room. This invention is provided with a spraying means equipped with nozzles for spraying a chemical solution containing a pest control agent into a plant cultivation room. Liquid droplets being sprayed from the nozzles measure 100 ?m or smaller, and have an average particle diameter of 10-30 ?m. The nozzles are disposed so that the spray from the nozzles fills the entirety of the plant cultivation room interior in a uniform manner. The invention is provided with a control device for causing the nozzles to spray so that the humidity in the plant cultivation room is 90-100%.

Abstract: Provided is a spray nozzle configured so that the angle of spray does not change even if the flow rate of liquid is adjusted largely. A circular conical primary hole narrowing toward the discharge-side front end is provided in a communicating manner at the discharge-side center of a primary flow passage extending along the center axis of a nozzle body, and a pair of secondary holes is provided on both sides of the primary hole in the width direction so as to communicate with the primary flow passage and the primary hole. The secondary holes are formed in an elongated shape, and portions of the long sides of the secondary holes on both sides, the portions facing each other across the primary hole, and both side portions of the primary hole are connected.

Abstract: An ultra-fine spray-jetting nozzle includes a liquid passage (37) and a gas passage (41) that is disposed on a peripheral side of the liquid passage (37) through a partitioning wall and communicates with a jetting port (A). An outer surface of the partitioning wall at a jetting port side thereof is formed sectionally polygonal, long circular or elliptic. A peripheral surface of the gas passage (41) is formed sectionally circular. The outer surface of the partitioning wall having the configuration is brought into contact with the sectionally circular peripheral surface of the gas passage (41) at a plurality of positions to circumferentially divide the gas passage (41) at the jetting side into a plurality of gas passages. A gas jetted from jetting ports (A) of a plurality of the separate gas passages is mixed with a periphery of a liquid jetted from the liquid passage (37) to generate spray.

Abstract: A spray nozzle has a nozzle tip removably installed on a main body of the spray nozzle at a spray side thereof. The nozzle tip has a flow path communicating a spray port disposed on a front-end surface with an inlet port disposed at a rear-end surface along an axis of the nozzle tip. A throat portion is provided on the flow path of the nozzle tip in a range from the inlet port to the spray port. The sectional configuration of the flow path in a range from the inlet port to the throat portion is circular or elliptic, and a sectional area of the flow path decreases gradually from the inlet port to the throat portion.

Abstract: A sterilizing apparatus installed on a car includes a nozzle-installing pipe on which a plurality of nozzles are mounted at regular intervals, a driving mechanism for varying the spray angles of the nozzles, a driving mechanism for controlling the spray time periods, a supply mechanism for supplying disinfectant to a disinfectant-flowing path equipped in the nozzle-installing pipe, a plurality of tanks containing disinfectant to be supplied to the supply mechanisms and control mechanisms for controlling the operation of the driving mechanisms. The car is moved to a required place in a hospital, and the nozzles are operated by spray disinfectant particles, the diameter of which are 10 .mu.m or less.

Abstract: A humidifier comprises a liquid storing chamber provided in the lower portion of the casing. A nozzle is provided in the upper portion of the casing. An adaptor, provided in the upper portion of the casing, introduces compressed air and liquid into the nozzle. A liquid sucking pipe communicates with a liquid sucking opening of the adaptor and extends vertically downward to the vicinity of the bottom surface of the liquid storing chamber. A float is provided in the liquid storing chamber and is movable along the inner surface of the liquid storing chamber, depending on the amount of the liquid stored therein. A liquid cutoff lever is provided above the float and contacts the upper surface thereof. A liquid cutoff valve, of a liquid cutoff device mounted on the casing is operated by the liquid cutoff lever so that the capacity of the liquid to be controlled by the liquid cutoff valve is small, for example 30 cc.

Abstract: A nozzle is disclosed which has a cylindrical nozzle main body. A nozzle tip of the nozzle comprises a plurality of members formed by dividing an approximately cylindrical member in the axial direction thereof and is accommodated in the interior of the nozzle main body. A spring is provided between a spring receiving section of the nozzle tip and a wall positioned on a forward side of the nozzle main body. At least one of a peripheral surface of a discharge section of the nozzle tip and an inner surface of a tip engaging opening of the nozzle main body is tapered. A self-cleaning operation is performed when the atomization pressure is reduced, because the spring urges the nozzle tip toward a rearward side of the nozzle main body.

Abstract: A two-fluid nozzle, constituted by a gas inlet and a liquid inlet; a first mixing chamber having a gas feed element connected to the gas inlet for feeding a gas along an axial center line in a direction toward a discharge end of the nozzle and having a liquid feed element for feeding a liquid into the outer periphery of the gas at the downstream end of the gas inlet; a substantially uniform diameter rectifying chamber opening out of the first mixing chamber and extending along the axial center line toward the discharge end for receiving the mixture of gas and liquid and conveying it therealong; a second mixing chamber having a larger diameter than the rectifying chamber and into which the downstream end of the rectifying chamber opens, the second mixing chamber having a wall face at the downstream end thereof spaced from and opposed to the downstream end of the rectifying chamber and against which the outer peripheral portion of the mixture of gas and liquid discharged into the second mixing chamber from the

Abstract: An atomizer nozzle assembly for producing an extrafine mist of liquid includes a nozzle assembly, with a liquid passage hole of each nozzle tip of the assembly extending along a longitudinal axis of the nozzle tip. A front end opening of each liquid passage hole is centrally formed in the front end face of each nozzle tip. The angle of taper of a front tapered portion of each nozzle tip is 16.degree.-24.degree.. With the above arrangement, it is possible to produce a substantially ultrafine mist when the atomizing operation is started and it is also to produce an ultrafine mist having a constant particle diameter during a rise in the initial pressure of compressed air immediately following the start of atomization.

Abstract: A liquid storage tank having a feed port is provided with a float valve for opening and closing the same. The float valve includes a float member and a rod member having one end connected to the float member. The other end of the rod member is fitted into a valve seat, which is formed on the inner periphery of a feed pipe constituting the feed port, and is provided with a valve plug portion for opening and closing the valve seat. When the level of the liquid in the tank is lowered together with the float member, the rod member is tilted so that the valve plug portion is partially separated from the valve seat to open the feed port. When the float member is in a position at which the float member supports the rod member in a horizontal position, the valve plug portion is seated on the valve seat to close the feed port. The pressure of the supply of liquid acts on the valve plug portion to urge the valve seat portion against the valve seat.

Abstract: A spray nozzle which has a nozzle main body and opening at one end in fluid communication with an inflow hole passing into the central portion of the nozzle main body. The inflow hole has a rounded orifice portion in fluid communication with an elongated discharge slot at an opposite end of the nozzle main body. Stirring channels extend along and are in fluid communication with the inflow hole. Each stirring channel has a cup-shaped end which is laterally adjacent the rounded orifice portion of the inflow hole. The cut-shaped portion of the stirring holes causes a reverse flow of mixed gas and liquid which passes down the stirring channels such that mixed gas and liquid passing through the inflow hole towards the elongated discharge slot is agitated and a uniform spray with fine droplets is jetted from the discharge slot.

Abstract: An atomizing nozzle comprises at least two nozzle heads arranged in particular relation to each other. Each of the nozzle heads has a discharge port through which a simple jet of liquid drops are jetted. These nozzle heads are so arranged that the respective longitudinal axes of these nozzle heads intersect at a predetermined angle with each other while each of the discharge ports is spaced a predetermined distance from the point of intersection of these longitudinal axes.