A method of using a fluid dispenser unit having a reservoir and a piston that slides in the reservoir. The unit includes an extractor head secured to the reservoir to suck fluid to be dispensed into the reservoir, and a spray head assembled on the extractor head to spray the fluid out from the reservoir. The method includes the steps of sucking a fluid to be dispensed into the reservoir through the extractor head; assembling the spray head on the extractor head; and spraying the fluid through the spray head. The step of sucking up a fluid to be dispensed includes a first step of extracting a fluid, such as a solvent, from an extraction reservoir, and a second step of mixing the fluid with a first substance, such as a powder or a lyophilisate, so as to form the fluid to be dispensed.

A spray tip is configured to atomize thick, viscous fluids. The spray tip includes a pre-orifice piece having an inlet orifice that defines a first restriction in a fluid path through the spray tip. The spray tip also includes a tip piece having an outlet orifice that defines a second restriction in the fluid path. The first and second restrictions are the portions of the fluid path having the smallest flow areas. A cross-sectional area of the outlet orifice is greater than a cross-sectional area of the inlet orifice.

Disclosed is a method for disinfecting and cleaning to prevent contamination of a passenger vehicle, characterized in that it includes the following operations: —installing at least one filter and condenser in the ventilation circuit; creating a swirling vortex of a disinfectant liquid by a gas referred to as a driving gas; spraying the swirling mixture created onto the clothing and luggage of passengers before they enter the passenger compartment; and spraying the mixture created onto the solid surfaces and/or into the air of the passenger compartment to be disinfected. Also disclosed is a device for implementing the method.

A hand held shower head configured to deliver a continuous dose of water dispersed treatment from a water disintegratable treatment source, the shower head including: a hollow body having water inlet opening and water outlet, the water outlet defined by a perforated plate, and a mesh formation disposed within the hollow body between the water inlet opening and the perforated plate, wherein the water inlet opening, hollow body and perforated plate are configured to create in use a pressurised turbulent water flow within the hollow body prior to exiting through the perforated plate, whereby a water disintegratable tablet treatment source introduced into the hollow body prior to use, is then agitated by the turbulent water flow against the mesh in an abrading manner and thereby dispersed into the water flow exiting the perforated plate. A water disintegratable tablet comprising emulsifier, thickening agent, surfactants, oil and rheology modifier is also disclosed.

A step cavity type low frequency ultrasonic atomization nozzle with a swirlable vortex impeller, has an air intake casing, an inlet casing, a Laval core, a fixed cap, an adjustable pedestal, and taper rectifying sleeve, swirlable vortex impeller, stepped resonance tube, regulative plunger, positioning lead, second pedestal. The regulative plunger is located in the second stepped hole of the stepped resonance tube, and its axial position is adjustable; the swirlable vortex impeller is fixed on the taper resonance tube through the bearing, and the outer cone surface is matched with the inner cone surface of the taper rectifying sleeve. The resonant cavity is improved so that the two-phase fluid in the cavity can generate higher frequency and greater fluctuation of the pressure fluctuation amplitude, optimize the initial atomization performance of the nozzle, and optimize the nozzle outlet, and increase the swirlable vortex impeller.

A showerhead engine internally swirls water within a swirling chamber. Multiple swirling chambers may be used, each separated from one another. The water is swirled angled through holes in a mid plate. As the water passes through the angled holes, it is projected out an angle. The water then contacts the swirling chamber wall and continues to follow the curvature of the wall. The curved wall paired with the angled entry causes the water to continue to swirl within the swirling chamber. The water is released out of the swirling chamber through slots, which allow the water to retain the angular velocity at a discharge angle.

A multi-mode fluid nozzle includes a generally-cylindrical mixing chamber with a stream mode fluid inlet connected to one side of the chamber, a fluid outlet connected to the opposite side of the chamber and a plurality of mist mode fluid inlets connected to the periphery of the chamber. The discharge pattern of the multi-mode fluid nozzle is dependent upon the inlets from which fluid enters the mixing chamber such that when the fluid enters the mixing chamber through the stream mode fluid inlet, the fluid exits the fluid outlet in a stream flow discharge pattern, when the fluid enters the mixing chamber through the mist mode fluid inlets, the fluid exits the fluid outlet in a mist flow discharge pattern and when the fluid enters the mixing chamber through the stream mode and the mist mode fluid inlets, the fluid exits the fluid outlet in a droplet flow discharge pattern.

A fluid supply apparatus for inducing cavitation and Coanda effects, includes: a cavitation generator configured to allow an introduced fluid to flow while rotating along a propeller-shaped wing so as to generate microbubbles in the fluid; and a Coanda generator disposed in front of the cavitation generator and having a plurality of Coanda generating protrusions arranged at regular distances so that, as a fluid passing through the cavitation generator to contain microbubbles passes through a passage between the Coanda generating protrusions, a velocity increases and the pressure decreases, thereby causing a Coanda effect in which the fluid flows along a surface of an object.

A showerhead engine internally swirls water within a swirling chamber. Multiple swirling chambers may be used, each separated from one another. The water is swirled angled through holes in a mid plate. As the water passes through the angled holes, it is projected out an angle. The water then contacts the swirling chamber wall and continues to follow the curvature of the wall. The curved wall paired with the angled entry causes the water to continue to swirl within the swirling chamber. The water is released out of the swirling chamber through slots, which allow the water to retain the angular velocity at a discharge angle.

A water outlet structure allowing a nozzle to generate different spray patterns and a water outlet device using the water outlet structure are provided. The water outlet structure includes: a housing, a water outlet cover, a water dispersion assembly, a water separation assembly, a water oblique assembly, and a switching assembly. At least two water inlet holes are defined through the housing. The water outlet cover is connected to the housing, and a plurality of water outlet portions are defined through the water outlet cover. The water dispersion assembly includes a first water dispersion hole and a second water dispersion hole. The water separation assembly directs pressurized water into a first chamber or a second chamber. The water oblique assembly forms the first chamber with the water separation assembly, and forms the second chamber with the water outlet cover.