A method of controlling the spray droplet size of a spray nozzle apparatus, in particular for the manufacturing of food powders, delivered to the spray nozzle comprises the following steps: a) providing a paste of a product to be sprayed by a spray nozzle; b) continuously determining the shear viscosity () of the product paste delivered to the spray nozzle; c) determining the mass flow rate (Qrn) of the product paste delivered to the spray nozzle; d) determining the static pressure (P) of the product paste delivered to the spray nozzle; e) determining the density (p) of the product paste delivered to the spray nozzle; f) delivering the data obtained in steps b) to e) to a control device comprising a computer and a memory; g) calculating control data for adjusting the spray nozzle on the basis of the data obtained in steps b) to e) and on nozzle geometry parameters stored in the memory; h) sending the control data as control signals to a control means of the spray nozzle and adjusting the spray nozzle accordingly.

A fluid supply apparatus according to an embodiment of the invention includes an internal structure and a housing such as a pipe body configured to house the internal structure. The internal structure includes a first portion, a second portion, a third portion, and a fourth portion formed integrally on a common shaft member having a circular cross-section. The first portion is positioned upstream of the housing when the internal structure is housed in the housing and includes a shaft portion and a at least one spiral vane. The second portion is positioned downstream from the first portion and includes a shaft portion and a plurality of protrusions. The third portion is positioned downstream from the second portion and includes a shaft portion and at least one spiral vane. The fourth portion is positioned downstream from the third portion and includes a shaft portion and a plurality of protrusions.

A shower head includes a body including a head unit and a tap water flow path. The head unit has one end connected with a hose through which water flows and an opening formed at the other end. A bottom plate is fixed inside the head unit and including a hole at a central part. A micro bubble generator is placed on the bottom plate and including a micro bubble generating path inside. A tornado plate is positioned between the bottom plate and the micro bubble generator and including an eccentric hole configured to achieve an increased flow speed by swirling the water. A pressing plate houses the micro bubble generator and is fixed inside the head unit together with the bottom plate. A tubular cap is fitted to the opening of the head unit and housing the micro bubble generator inside.

Dispensing head (1) intended to be fitted on a container that contains at least one product to be dispensed, this dispensing head comprising: a body (3) that is open at its two opposite axial ends, an engaging part (10) that is open at its two opposite axial ends, at least partially defining a dispensing orifice.

A spray head including: an inlet for receiving fluid; a plurality of nozzles in fluid communication with the inlet; and a swirl inducer downstream of the inlet and adapted to produce, when in use, swirled fluid flow; wherein the plurality of nozzles are adapted to shape the swirled fluid flow exiting therefrom into a continuous jet of fluid of substantially dome shape.

[Problem] To provide a shower head capable of providing a shower feeling without a water spray plate, and configured to effectively generate micro bubbles, provide a shower feeling, and easy to hold.

[Solution] A shower head capable of providing a shower feeling without a water spray plate, the shower head including: a body that includes a head unit having one end connected with a hose through which tap water flows and including an opening formed at the other end, includes a flow path through which tap water flows, and is held by a hand; a bottom plate fixed inside the head unit and including a drilled hole at a central part; a micro bubble generator placed on the bottom plate and including a micro bubble generating path formed inside; a tornado plate positioned between the bottom plate and the micro bubble generator and including an eccentric hole configured to achieve an increased flow speed by swirling the tap water; a pressing plate housing the micro bubble generator and fixed inside the head unit together with the bottom plate; and a tubular cap fitted to the opening of the head unit and housing the micro bubble generator inside.

An atomizing injector comprises a body having a central bore with a valve situated in the bore, leading to a chamber. An actuator moves the valve between closed condition and open conditions, selectively exposing the chamber to a flow of pressurized liquid. A discharge port extends from the chamber to a discharge orifice. A swirl element is situated in the chamber, while leaving a free space in the chamber immediately above the discharge port. When the valve is opened, liquid flows into the chamber, through the swirl element into the space, forming a whirl in the space before passing through the discharge port and exiting the discharge orifice as an atomized whirling spray.

A swirler for inducing swirl on a liquid flow includes a swirler body defining a downstream end and an upstream end; a plurality of axial slots on an external surface of the swirler body, each of the plurality of axial slots having a slot entrance and a slot exit; and a slot relief at the slot exit. Each of the plurality of axial slots are helical and configured to impart swirl on the liquid flow as the liquid flow traverses through each of the slots.

A swirler for swirling fluid in a nozzle has a swirler body. The swirler body defines an inlet end, an outlet end opposed to the inlet end, and a circumferential periphery. The circumferential periphery extends axially from the inlet end to the outlet end. The outlet end defines a first swirl chamber. The inlet end defines a second swirl chamber.

A dental hygiene system includes a feed line for a liquid that engages and dissolves a dental cleansing compound before being discharged from a nozzle connected to the feed line and sprayed on the teeth for cleaning.