1338 results about "Vena contracta diameter" patented technology

Liquid to be atomized is supplied from a wick to the underside of a vibrating orifice plate which pumps the liquid up through atomizing orifices in the plate and ejects the liquid from is upper side; and liquid which is pumped up through the orifices in an elevated region of the plate, but which has not been ejected, is directed back down through larger openings in a lower region of the plate. The liquid also flows back onto the wick which places the liquid in capillary communication along the underside of the plate with the atomizing orifices for reputing and ejection.

Disclosed herein is a piezoelectric liquid delivery system or atomizer for production of droplets of liquid or liquid suspensions by a battery operated dispenser utilizing an orifice plate in communication with a piezoelectric element. By control of the viscosity and surface tension of the liquid to be dispersed, an improved method of dispensing such liquid is achieved.

A recording apparatus including an ink tank and a recording head having a flow path forming portion that has an ejection orifice plate having plural ink ejection orifices and a liquid chamber provided for each orifice to supply ink to the orifices, and an energy generating element for ejecting ink in the chamber. A surface layer of the flow path forming portion opposes to the outside of the plate. An opening is provided opposing to the orifices in the surface layer. An ink reservoir is provided between the plate and the opening. A circulation flow path communicating with the ink reservoir is provided. The area of the opening is larger than that of the orifice. Both ends of the circulation flow path are respectively connected to inlet and outlet portions connected to the circulation flow path. The inlet and outlet portions and liquid chamber are connected to the ink tank.

A cooling apparatus and a direct cooling impingement module are provided, along with a method of fabrication thereof. The cooling apparatus and direct impingement cooling module include a manifold structure and a jet orifice plate for injecting coolant onto a surface to be cooled. The jet orifice plate, which includes a plurality of jet orifices for directing coolant at the surface to be cooled, is a unitary plate configured with a plurality of jet orifice structures. Each jet orifice structure projects from a lower surface of the jet orifice plate towards the surface to be cooled, and includes a respective jet orifice. The jet orifice structures are spaced to define coolant effluent removal regions therebetween which facilitate removal of coolant effluent from over a center region of the electronic component being cooled to a peripheral region thereof, thereby reducing pressure drop across the jet orifice plate.

A fluid flow distribution device (10) is provided for use in a heat exchanger (12) having multiple heat exchange units (14) that receive a fluid flow (18) from an fluid inlet (16). The device includes a plurality of tortuous flow paths (31) to direct distributed portions of the fluid flow (18) from the inlet (16) to the heat exchange units (14). Each tortuous flow path (31) is defined by a pair of flow chamber plates (24,26), and an orifice plate (28) sandwiched between the flow chamber plates (24,26). Each tortuous flow path (31) includes a series (34) of orifices (36) extending through the orifice plate (28), a first pattern (38) of first flow chambers (40) formed in one of the flow chamber plates (24,26) and aligned with sequential pairs of the orifices (36), and a second pattern (42) of second flow chambers (44) formed in the other of the flow chamber plates (24,26) and offset with respect to the first pattern (38) and the pairs of orifices (36).

An ALD coating system (100) includes a fixed gas manifold (710, 1300) disposed over a moving substrate with a coating surface of the substrate facing precursor orifice plate (930). A gas control system (1400) delivers gas or vapor precursors and inert gas into the fixed gas manifold which directs input gases onto a coating surface of the moving substrate. The gas control system includes a blower (1485) interfaced with the gas manifold which draws gas through the gas manifold to remove unused precursors, inert gas and reaction byproduct from the coating surface. The gas manifold is configured segregate precursor gases at the coating surface to prevent the mixing of dissimilar precursors. The gas manifold may also segregate unused precursor gases in the exhaust system so that the unused precursors can be recovered and reused.

A liquid atomizing device for dispensing liquid droplets includes a container for holding a liquid, the container having a porous wick positioned to communicate the liquid from the container, and an orifice plate with apertures, the orifice plate being vibrated by a piezoelectric element to cause liquid communicated from the container to be atomized and dispensed as liquid droplets through the apertures. The device employs a unique placement and design of heaters or fans to promote evaporation and dispersion of the atomized liquid while the liquid is airborne.

For lasting stable vapor deposition of a material for a long term, the present invention provides the vapor deposition crucible comprising an evaporation chamber defined by a container part of the material and an orifice plate controlling vapor pressure of the material evaporated therein, and a pressure-controlling chamber defined in a space between the orifice plate and a discharge plate through which the material is discharged to the exterior of the vapor deposition crucible. A protrusion extending outwardly from the pressure-controlling chamber and having a second opening on its distal end may be provided on the upper surface of the discharge plate, and a heater may be provided on the side surface of the protrusion to oppose the side surface of the protrusion with an insulation mechanism provided at a position higher than the heater but lower than the second opening. In the vapor deposition crucible, temperature of the pressure-controlling chamber may be kept higher than that of the evaporation chamber by the other heaters.

A fragrance sampling system for use in a store comprises a piezoelectrically vibrated orifice plate atomizer mounted to extend from a support structure in the store, such as a shelf and operated to emit puffs of very small droplets of the liquid fragrance and eject them upwardly into the atmosphere such that they become fully evaporated before contacting any supporting surface. The atomizer is controlled by electrical circuits which limit the times during which atomization occurs.

A fluidized-bed reactor for producing hydrogen from methane by steam reforming includes a flow splitter that splits a dense-phase flow of a gas having entrained calcium oxide particles into a plurality of equal flow streams. The reactor also incorporates an orifice plate having at least one high-velocity, rocket-style impinging injector for injecting reactants into the reactor bed. The injector includes a central orifice extending perpendicularly through the plate, and one or more adjacent peripheral orifices that extend through the plate at such an angle that respective streams of reactants injected into the reactor bed through the peripheral orifices impinge on a stream of reactants injected vertically into the reactor bed through the central orifice. The injector cooperates with adjacent base-bleed orifices in the plate to provide a uniform distribution and rapid mixing of the calcium oxide particles with a steam / methane gas mixture across the entire bottom of the reactor bed.

A heat dissipation system includes a cooling device, a condenser, a vapor conveying duct and a cooling liquid conveying duct. The cooling device includes a housing, and an orifice plate dividing an inner space of the housing into a liquid supply chamber and an evaporation chamber proximate to the heat source, and formed with multiple micro orifices each having a diameter ranging from 5 to 1000 micrometers. The condenser includes a fluid inlet, a condensing chamber and a fluid outlet. The vapor conveying duct connects a vapor outlet of the housing and the fluid inlet of the condenser. The cooling liquid conveying duct connects a cooling liquid inlet of the housing and a fluid outlet of the condenser.

The present invention belongs to the field of chemical fluid mechanical technology, and relates to one kind of hydraulic cavitating disinfector. The disinfector consists of mainly pump, pipeline, orifice plate, flange, material tank, valve, pressure meter, etc. The present invention features that the throttling effect of the orifice plate is utilized to produce hydraulic cavitation and the instantaneous high temperature and high pressure produced during cavitating is utilized in disinfecting fluid material. The disinfector features high efficiency, convenient operation, instantaneous disinfection, local high temperature and integral normal temperature, etc. and can avoid the damage and overheat decomposition of effective components in the liquid material. The present invention is suitable widely for disinfection of water, milk, fruit juice, and other beverage, food and nutriment.

A system and method for optimizing print quality of print media is for use on an ink jet printing system with a drop generator and an orifice plate disposed on the drop generator, wherein the orifice plate comprises nozzles forming a jet array. The drop generator is adapted to modulate ink volume per pixel by adjusting drop generator input voltage or drop generator pulse width. A corona discharge system is also used to form ionized air that contacts with a print media enhancing the wettability of the print media prior to exposing the print media to the drop generator. A controller operates the corona discharge system in tandem with the drop generator to optimize print quality by controlling drop spread and ink film thickness from the printhead onto the print media.

A method of sampling a multi-phase fluid stream is provided which comprises the steps of: sampling, with a sampling probe, a portion of the fluid stream; measuring the flow rate of said sampled portion; and measuring, independently of the sampling step, the total flow rate of the fluid stream, wherein the flow rate of the sampled portion is controlled according to the ratio of the flow rate of the sampled portion to the flow rate of the fluid stream, in order to obtain substantially isokinetic sampling of the fluid stream. The method may provide isokinetic sampling to an accuracy of 5% or less and preferably only samples a small portion of the fluid stream. The method has particular application for high rate condensate gas wells. A corresponding sampling system is provided which has particular application in the sampling of streams from well-heads. A flow conditioner for use with sampling methods and systems is also provided, the flow conditioner being a pipe section including: a swirl inducing section; a flow straightener; and an orifice plate.

The method of manufacturing a recording head has a flow path wall forming step of forming flow path walls on a substrate having energy generating elements formed thereon, an imbedded material depositing step of depositing an imbedded material between the flow path walls and on a top of each flow path wall, a flattening step of polishing a top of the deposited imbedded material, until the top of the flow path wall is exposed, and a step of forming an orifice plate on the tops of the polished imbedded material and the exposed flow path wall. In the step of forming the flow path walls, patterning of a close contact property improvement layer is simultaneously performed to improve a close contact property between the flow path wall and the substrate.

An ink jet head is provided with an orifice plate having a plurality of discharge ports being open thereto. This ink jet head comprises evaporation suppressing groove in the vicinity of the discharge ports. With the arrangement thus formed, it becomes possible to heighten the humidity in the atmosphere in the vicinity of discharge ports, hence suppressing the evaporation from the discharge ports for the prevention of unstable discharges.

A system for venting a high-pressure flow stream is disclosed, the system comprising a device having a plurality of orifice plates, each orifice plate having a plurality of orifices, wherein the plurality of orifice plates are oriented relative to each other such that the pressure of the flow stream substantially drops.

The present invention relates to a protective barrier adapted to fit over a roof vent, particularly an off-ridge roof vent, which provides for ventilation and also restricts pass-through of wind-driven rainwater. The barrier comprises two parallel orifice plates, such as louvered panels with passages, that are spaced apart a desired distance by a stagnation zone, so that the device is effective to reduce or eliminate of passage of wind-driven rainwater to the interior of the vent. In various embodiments, the number of louvers in the more outward-disposed orifice plate is greater than the number of louvers in the more inward-disposed orifice plate.

The invention discloses a device for realizing a turbulent flame and shock wave visual constant volume combustion test. The device comprises a firebomb body, a fuel supply system, a heating system, an igniting system, a high-speed photography system, an air inlet and outlet system, a pressure acquisition system, a synchronous controller and a single-chip microcomputer control system. The device also comprises orifice plates with different amounts of porosity and aperture sizes. In each test, the cross section of the firebomb body is provided with one of the orifice plates through an orifice plate slot. The method utilizes hydrogen as fuel. Through use of the orifice plates with different amounts of porosity and aperture sizes, turbulent flame with different intensities is obtained and visible shock wave is produced. The invention researches interaction of reflection shock wave and flame and interaction-caused influence on pressure fluctuation in a cylinder. The method and device provide theoretical thinking for pressure fluctuation phenomenon in an enclosed space and knocking of a small reinforced gasoline engine. The device and method realize full transparent visualization of the whole combustion chamber and clear and visual shooting of the whole flame development process.

A process flow device that includes a self-averaging orifice plate type of primary flow element for measuring, by a differential pressure process, the volumetric rate of fluid flow at a point in a fluid carrying conduit where the velocity profile of the fluid is asymmetric with respect to the longitudinal axis of the conduit. The improved flow element comprises a planar flow-impeding plate disposed transversely across the interior of the conduit and perpendicular to the longitudinal axis thereof. The plate includes at least three circular apertures eccentrically disposed with respect to the longitudinal axis of the conduit to create static pressure averaging on the downstream side of the plate. Upstream and downstream static pressure sensing ports are respectively provided on opposite sides of the flow impeding plate.

A printhead maintenance station comprises a base including a spitting zone, a maintenance sled movable relative to the base, a wiper assembly for cleaning a printhead orifice plate, a capping assembly for capping a printhead orifice plate, a pick motor operating a paper picking assembly and the maintenance sled and the capping assembly, and, wherein the maintenance station provides for spitting, wiping, and capping of a printhead orifice plate.

A liquid formulation with uniform consistency over extended periods of time, said method comprising the steps of: providing a liquid formulation in a container, said liquid formulation having a viscosity greater than five centipoise; driving, by means of a power source, a piezoelectric actuator which is coupled to an orifice plate so that the piezoelectric actuator vibrates said plate to produce and disperse fine droplets of said liquid formulation, said plate being formed with orifices having diameters in the range of 1-25 microns; said piezoelectric actuator operating in a bending mode; and during vibration of said plate, delivering said liquid formulation from said container to said plate by capillary action.

An ink jet recording apparatus according to an embodiment of the invention includes an ink jet head having a pressure chamber facing a nozzle, and an upstream port and a downstream port connected to the pressure chamber, a main tank connected to the ink jet head via the upstream port and capable of storing ink therein, and a sub-tank connected to the ink jet head via the downstream port and capable of storing ink, wherein at least when printing by ejecting ink from the nozzle, the relation between ph, r, R and Q is held to satisfy ph−{QR×(1 / (1+r))}=Pn (Pn being a constant representing a proper pressure in the nozzle), where ph represents a potential pressure in the main tank as viewed from a surface of an orifice plate where the nozzle of the ink jet head is formed, R represents a total flow path resistance from the main tank to the sub-tank via the ink jet head, a ratio of a flow path resistance from the main tank to the nozzle and a flow path resistance from the nozzle to the sub-tank is expressed by 1:r, and Q represents a flow rate of ink that circulates in a circulation path formed by connecting the ink jet head, the main tank and the sub-tank.

The invention relates to a trickle downward film type evaporator device and a using method thereof; the downward film type evaporator of the prior art which is the two-phase refrigerant distributor technology has a five-layer orifice plate structure and a capillary structure, as the structure is more complicated and the processing and assembling difficulty is high, the uneven liquid distribution is easily caused, the heat transfer performance is decreased and the energy efficiency is lowered. The trickle downward film type evaporator device adopts the technical proposal of a multi-directional two-grade pressure decrease distribution device, a two-phase refrigerant distributor which consists of a trapezoidal shell body, a multi-directional flow distribution plate, a grade-one distribution orifice plate, a grade-two distribution orifice plate, a gas absorption distribution plate and an end seal plate is used for carrying out the multi-directional two-grade pressure decrease distribution, thereby leading a gas-liquid refrigerant to be evenly and effectively trickled at the outer surface of the pipe wall of an evaporation pipe bundle and further carry out the full heat exchange. The trickle downward film type evaporator device has the advantages that: the two-phase refrigerant distributor technology has simple structure, easy production, even liquid distribution of the gas-liquid refrigerant and improved heat transfer performance. Compared with the existing flooded evaporator, the energy is saved by 15-20 percent, and the filling amount of the refrigerant is reduced by 20-30 percent, thereby being economic and energy-saving.

The invention relates to an improvement in known apparatus for removing or separating certain contaminants and debris from drainage water. The known device has a tank defining a chamber with an inlet and a pair of vertically spaced outlets. A bulkhead with openings is spaced opposite the inlet and extends from the base of the chamber. A baffle is located between the bulkhead and the outlets and extends from the top of the chamber to near the bottom. An orifice plate or plates is adjustable mounted in series with the outlets and controls the rate of flow therethrough. The system thus has four sections, namely a non-floating particulate containment chamber; a floating particulate containment chamber; a flow control chamber; and an outlet chamber. In accordance with the invention, a fluid-previous media is provided at the interior of said apparatus in or abounding the flow path of the drain water proceeding between said inlet and outlet. The media is infused with a composition comprising a homogeneous thermal reaction product of an oil component selected from the group consisting of glycerides, fatty acids, alkenes, and alkynes, with a methacrylate or acrylate polymer component; the said contaminants in the drain water flowing through said apparatus thereby coming into intimate contact with and being immobilized at said media.