840results about How to "Avoid turbulence" patented technology

A method for separating, or removing, particulate material, e.g., blood cells, from a sample of fluid, e.g., whole blood of a patient, in which the particulate material is suspended. In the case of separating blood cells from blood plasma or blood serum, the resulting samples of blood plasma or blood serum can be used for in vitro diagnostic applications. In normal practice, a whole blood sample of a patient are provided and then introduced into an apparatus that contains a flow channel. An acoustic field, which contains acoustic standing waves from external ultrasonic transducers, is located within the flow channel. Laminar flow is maintained in the flow channel. Blood cells and platelets are separated from blood plasma or blood serum at the end of the flow channel and collected. The method described herein allows fluid components to differentially migrate to areas of preferred acoustic interaction. The parameters that affect separation of particles are size, density, compressibility of the particles, and the fluid surrounding the particles.

A system and method of reducing particle generation in packaging containers used to transport ultra pure liquids. Particle generation in the containers is reduced by reducing the air-liquid interface present during filling, transport, and dispensing of the liquid.

A lamp comprises a housing, a heat sink, a light emitting member, a fan and a blocking ring. The housing includes an outlet section and an inlet section formed on the wall thereof. The heat sink is mounted inside the housing and includes a base plate and a plurality of fins, with the fins being close to the outlet section of the housing and arranged around the base plate to form a chamber. Each of the fins has a first end facing the inlet section of the housing and a second end connecting with the base plate. The light emitting member is fixed to the base plate of the heat sink. The fan is fixed inside the chamber of the heat sink. The blocking ring is mounted inside the housing and between the inlet section and the heat sink and includes an inlet hole aligned with the chamber of the heat sink. By the blocking ring, parts of the heated air flows are blocked from flowing back to the inlet section to avoid turbulence resulting from flowing back air flows. Consequently, the air flows risen by the fan and receiving the heat inside the housing can flow smoothly to out of the housing through the outlet section to enhance heat dissipating efficiency of the heat sink and the fan.

The present invention provides a thermal cycling device including: a heat exchanger body (3) having a longitudinal axis and longitudinally divided to provide at least two segments which are able to be heated to different temperatures so that said body has peripheral surfaces of different temperatures; a conduit (2) extending about said body so as to be in thermal contact with said peripheral surfaces; a first delivery device to deliver a first fluid to said conduit to cause said fluid to pass therealong and therefore change in temperature as the fluid passes said segments; and a second delivery device to deliver a second fluid to said conduit so as to flow with said first liquid and therefore also change in temperature. The fluid then leaves the device by conduit (4). The invention also is directed to an injector means for use in the thermal cycling device of this invention, comprising: a septum (26); a needle (20) which is able to pierce the septum; a reservoir (27) in fluid contact with septum (26) having an inlet (28) and an outlet (30); wherein when in use, the needle is urged through the fluid in said reservoir and then through the septum while continually purging the reservoir with said purge fluid. The present invention also includes a scanning detector (5) fitted to the outside of the heat exchange body (3) which monitors the course of reaction inside the conduit (2).

The invention discloses detection equipment and a detection method. The detection equipment comprises a sampling device used for collecting a sample to be detected, a preprocessing sample injection device used for preprocessing the sample from the sampling device, and a sample analysis device used for separating the preprocessed sample from the preprocessing sample injection device and analyzing the separated sample. The detection equipment is miniaturized, can quickly and accurately detect gas-phase matters or particulate matters without unpacking, and is high in accuracy and suitable for security check of airports, ports, metro stations and the like.

Stent, as well as a method and device for fabricating the stent, wherein the stent has a tubular lattice structure comprising individual struts and at least one strut of which at least one longitudinal section runs with at least one directional component in the radial circumferential direction of the stent, wherein the surface of the longitudinal section facing the outside of the stent is curved only about the longitudinal axis of the stent. According to the invention, the surface of longitudinal section of the strut, which surface faces the inside of the stent, has such a curvature that the strut cross section is fluidically optimized.

A laser ablation cell (1) comprises a flow channel (11) having an essentially constant cross-sectional area so as to ensure a strictly laminar flow in the flow channel. A sample chamber (21) is provided adjacent to a lateral opening (14) of the flow channel. A laser beam (41) enters the sample chamber (21) through a lateral window (16) and impinges on a surface (24) of a sample (23) to ablate material from the sample. The sample may be positioned in such a distance from the flow channel that the laser-generated aerosol mass distribution has its center within the flow channel. This leads to short aerosol washout times. The laser ablation cell is particularly well suited for aerosol generation in inductively coupled plasma mass spectrometry (ICPMS), including imaging applications.

A nozzle plate includes a silicon substrate, and a nozzle hole formed in the silicon substrate for discharging a liquid droplet provided with: a first nozzle portion formed perpendicularly to a surface of the silicon substrate; a second nozzle portion formed on a same axis as an axis of the first nozzle portion and having a cross-sectional area that is larger than a cross-sectional area of the first nozzle portion; and an inclined portion having a cross-sectional area gradually increasing from the first nozzle portion to the second nozzle portion.

An at least two layer, unsupported, continuous microporous membrane is disclosed. The at least two layer, unsupported, continuous microporous membrane may include at least two different membrane pore size layers or the pore sizes may have about the same pore size. Apparatus and processes for fabricating at least a two layer unsupported, continuous, microporous membrane are also disclosed. One representative process disclosed for forming a continuous, unsupported, multilayer phase inversion microporous membrane having at least two layers comprises of the acts of: operatively positioning at least one dope applying apparatus, having at least two polymer dope feed slots, relative to a continuous moving coating surface; applying polymer dopes from each of the dope feed slots onto the continuously moving coating surface so as to create a multiple layer polymer dope coating on the coating surface; subjecting the multiple dope layer to contact with a phase inversion producing environment so as to form a wet multilayer phase inversion microporous membrane; and then washing and drying the membrane. Other representative apparatuses and processes are also disclosed.

Proposed is a showerhead-cooler system of a semiconductor-processing chamber with uniform distribution of plasma density. The showerhead has a plurality of through gas holes that are coaxial with respective channels of the gas-feeding cooler plate. On the gas inlet side, the though passages of the showerhead are provided with unequal conical nozzles characterized by a central angle that decreases from the peripheral part of the showerhead to the showerhead center. Such design provides uniformity of plasma density. Furthermore, in order to protect the walls of the nozzle and the walls of the gas holes from erosion that may be caused by the hollow-cathode phenomenon, these areas are coated with a thin protective coating that is resistant to electrical breakdown and chemical corrosion.

A method of controlling fluid flow to a stack of fuel cell flow field plates comprises providing in each fuel cell flow field plate of the stack of plates a fluid supply manifold aperture for conducting a supply of fluid to a number of the plates in the stack, the fluid supply manifold apertures forming an elongated fluid supply manifold extending through the stack, flowing the supply of fluid into the fluid supply manifold and laterally diverting a part of the supply of fluid to feed each of the number of the plates. The plates are each fed in parallel from the fluid supply manifold, and the laterally diverting is performed in a manner to avoid turbulence in the fluid supply manifold from adversely affecting supply of fluid to downstream ones of the number of plates.

The invention is a structure for inhibiting the turbulence phenomena of a fluid, exhibiting a surface geometry comprising at least one series of inhibition surfaces which inhibit turbulence present in a boundary layer of the fluid in proximity to the wall of the structure and which extend substantially longitudinally in the direction of flow of the fluid. The inhibition surfaces comprise at least a first series of surfaces (01) of amplitude a1 and at least a second series of surfaces (02) of amplitude a2. The second series of surfaces (02) is arranged so as to be superposed on the first series of surfaces (01), the first series of surfaces (01) allowing inhibition of at least turbulence of great amplitude and the second series of surfaces (02) allowing inhibition of at least turbulences of low amplitude. The structure has an application for forming at least part of a pipe for conveying a pressurized gas.

Disclosed herein is a multifunctional bidet having an extra function such as an enema function for a constipated person, in addition to its normal function of cleansing pubic area and anal region. Specifically, the bidet of the invention is constructed such in a manner that an anus-cleansing function, a bidet cleansing function, and an enema function are embodied in a single nozzle; or any one function is constituted on a spray tip projected from the separate spray nozzle body; or one or two functions among the anus-cleansing function, the bidet cleansing function and the enema function are embodied in two or three spray nozzles, which are projectably inserted in the lower central portion of the bidet body so as to be arranged horizontally adjacent to one anther; or one or two functions among the anus-cleansing function, the bidet cleansing function and the enema function are embodied in two or three spray nozzles, which are projectably inserted in the lower central portion of the bidet body so as to be arranged vertically adjacent to one anther.

The present invention relates to a method for insulating an aircraft cabin 6 and for the cooling or heating of cabin air in an aircraft, respectively with the method comprising the steps of: introducing aircraft cabin air into an aircraft cabin wall 6; guiding this aircraft cabin air along a section of this aircraft cabin wall 6; and leading this aircraft cabin air away from the aircraft cabin wall 6.

A heat dissipation apparatus has an enclosure, in which a lateral fan seat is integrally formed with the enclosure. The lateral fan seat divides the interior space of the enclosure into an upper chamber and a lower chamber. An axis is installed across the upper and the lower chambers through a center of the fan seat. A coil set, a magnetic element and a plurality of blades are mounted about the axis in each of the upper and lower chambers. Thereby, two sets of fans are formed in a single enclosure to increase the heat dissipation effect while the assembly convenience is improved.

The aseptic packaging installation comprises a bench under a ceiling, a line of machines mounted on the bench in a packaging zone subjected to a sterile laminar flow traveling vertically from the ceiling at a rate adapted to establish a first pressure in the packaging zone that is higher than a surrounding pressure, an intervention zone adjacent to the packaging zone, and subjected to a one-way flow of clean air travelling vertically from the ceiling of the intervention zone at a rate that is adapted to establish a second pressure in the intervention zone that is lower than the first pressure but higher than the surrounding pressure.

The invention discloses a method for casting rotary axis casts of aerogenerators, which comprises the steps of mould manufacture, the manufacture of sand moulds and moulding by casting. In the step b of the manufacture of sand moulds, a top sprue (1) is used as an inlet of iron liquor, and is alternately communicated with runners; a bottom runner is communicated with an ingate communicated with a cast mould cavity; the runners are designed into a first runner (3), a second runner (4) and a circular runner (5); the ingate is designed into a plurality of radial runners (6) for communicating the circular runner (5) and the cast mould cavity; filtering apparatuses are arranged on the first runner (3) and the second runner (4), and are also arranged between each radial runner (6) and the circular runner (5); and in the step c of moulding by casting, the casting temperature is controlled from 1310 DEG C to 1350DEG C; and finally, a cast (2) is obtained. The method for casting rotary axis cast of aerogenerator has the advantages of good residue blocking effect and low production cost.