3734 results about "Fluidic channel" patented technology

In some implementations, a low dead space airway adapter for sampling fluid flowing through a ventilation assembly includes an outer wall configured to couple to an endotracheal (ET) tube adapter and an internal projection positioned at least partially within an internal cavity defined by the outer wall and configured to extend within an internal cavity of the ET tube adapter when the airway adapter is in use. The internal projection can include a fluid passageway configured for fluid communication with at least a portion of the internal cavity of the ET tube adapter and a free end comprising an opening in fluid communication with the fluid passageway. At least a portion of the free end can be chamfered around the opening and configured to contact an inner surface of the ET tube adapter when the outer wall is coupled to the ET tube adapter.

The invention discloses a surgical operating instrument and a surgical operating system. The surgical operating instrument comprises a handle assembly, a forceps head assembly and a forceps tube assembly. The handle assembly comprises a handle and a trigger, the forceps head assembly comprises a first forceps head and a second forceps head which can relatively pivot to realize opening or closing, and at least one of the first forceps head and the second forceps head is configured to be capable of treating biological tissues. The forceps tube assembly comprises a pull rod and a forceps tube, a second fluid channel is formed between the outer circumferential wall of the pull rod and the inner circumferential wall of the forceps tube, an opening communicated with the second fluid channel is formed in the position, close to the forceps head assembly, of the forceps tube, and the first fluid channel is communicated with the second fluid channel and used for being connected with a fluid conveying device. A fluid passage between the open hole and the fluid conveying device is achieved, instrument switching in the operation process is reduced, the operation efficiency is improved, the operation duration is shortened, and meanwhile the workload of doctors is reduced.

The invention relates to an implantable vascular support system (10), comprising:—a fluid channel (13) passing through the support system (10) and through which fluid can flow; —a first pressure sensor (18a, b) arranged and configured to determine at least a static pressure or a total pressure in the region of the support system (10); —a second pressure sensor (17) arranged and configured to determine at least a static pressure or a total pressure in the region of the fluid channel (13).

A regenerative filter that includes a filter housing having inlet and outlet zones; a fluid path provided between the inlet and outlet zones; a plurality of filter elements each having an outer surface filter media applied thereto and functioning to filter particulate or contaminants from the fluid path. The filter elements are disposed in an monolithic array. An inlet port arrangement is disposed at the filter housing leading to the inlet zone and is constructed and arranged to direct the fluid path into the filter housing in a manner so as to maintain a controlled turbulence at the inlet zone. The inlet port arrangement comprises a pair of inlet ports that are arranged in juxtaposition at the inlet zone and each having one end where the fluid flow enters. Embodiments that are considered as falling under the scope of the present invention include 1. Single inlet / two or more outlets; 2. Two or more inlets / single outlet, or 3. Two or more inlets and two or more outlets.

A fluid delivery system is disclosed which comprises at least one first supply station for supplying a first fluid and at least one second supply station for supplying a second fluid different from the first fluid. The fluid delivery system further comprises a pressurizing unit for pressurizing the first and second fluids, said pressurizing unit comprising first and second pump modules, and each pump module comprising a chamber and a piston provided with a plunger to define first and second variable-volume sub-chambers. The fluid delivery system further comprises first and second inlet fluid circuits, first and second outlet fluid circuits, and a first recirculation fluid pathway fluidically connecting the first and second variable-volume sub-chambers of a pump module. Moreover, a first actuator is associated to said first recirculation fluid pathway for managing the fluid passage in both directions between said first and second variable-volume sub-chambers of said pump module. Methods of operating the fluid delivery system are disclosed too.

Provided are a double-cavity micro-fluidic chip having a reaction cavity and a test cavity and used for nucleic acid test, and a test method thereof. A fluid channel is provided between the reaction cavity and the test cavity, and only one exhaust channel is provided. The combination of the fluid channel and the exhaust channel can automatically provide resistance for a sample entering the test cavity from the reaction cavity, thereby achieving a controllable transfer of the sample between the reaction cavity and the test cavity. A gravity micro-fluidic chip and a centrifugal micro-fluidic chip are designed. The gravity micro-fluidic chip has a multi-turning circuitous fluid channel of which the diameter is smaller than that of a sample injection channel, such that under the action of gravity, the sample can flow into a reaction cavity from a sample adding region but cannot flow into the fluid channel, and then under pressurization by a simple pressurization device, the sample can enter a test cavity from the reaction cavity. The centrifugal micro-fluidic chip provides an exhaust channel branched from a fluid channel, and makes the exhaust direction opposite to a rotary centrifugal direction and the position of an exhaust opening higher than that of the fluid channel; therefore, by combining the principle of internal and external balance of the atmospheric pressure and the centrifugal driving performance, the centrifugal micro-fluidic chip effectively controls the flowing of a gas and a liquid in reaction cavities and test cavities, so as to effectively control the amount of the sample entering each cavity, so that multiple nucleic acid tests can be completed simply by means of one or two times of centrifugation. In addition, for a chip which only has a reaction cavity, an exhaust channel is connected to a liquid storage cavity, and a gravity-driving chip and an asymmetric pressure-driving chip are designed, thereby effectively avoiding aerosol pollution.

The invention discloses a CFD-based liquefied natural gas after-condenser structure optimization method and device. The method comprises the steps that an initial model is established based on an assembly drawing, and geometric pretreatment is completed; extracting a fluid channel, segmenting and selecting a computational domain, and carrying out local encryption on a key region; generating a polyhedral grid by using a grid division tool, and completing grid independence verification; importing the polyhedral mesh into a solver, and carrying out model setting; boundary and wall surface conditions are set, and solver parameters are configured; setting an initial flow field through a hybrid initialization method, and establishing a flow monitoring window and a temperature monitoring window to adjust simulation until convergence; analyzing the temperature cloud picture and the flow vector diagram, and adjusting the structure of the baffle plate; the tower diameter and the height of the filler layer are adjusted according to a physical quantity field change curve of the filler layer, and the performance of the recondenser is continuously improved. The problem of how to deeply study the flow heat transfer rule in the after-condenser and obtain the flow field distribution characteristics is solved, so that the working performance of the after-condenser is improved.

A fluid transfer system component for internally measuring fluid density in real- time. The component may be a flange comprising a base having a first face and a second face, a primary fluid passageway extending through the base from the first face to the second face, a secondary fluid passageway extending through the base from the first face to the second face, and an outside wall, a portion of which is configured to operably engage with a measuring device and comprises a third opening. The primary fluid passageway may have a non-circular cross-section allowing the secondary fluid passageway to be parallel to the primary fluid passageway. The third opening may be in fluid communication with the secondary fluid passageway allowing the measurement device to measure fluid data such as fluid density via the secondary fluid passageway.

The invention relates to the technical field of blood potassium detection, in particular to a blood potassium detection paper-based sensor and a preparation method and application thereof.The sensor is obtained by integrating a substrate, a sensing electrode and a whole blood microfluid channel, and the sensing electrode is located between the substrate and the whole blood microfluid channel; the whole blood microfluid channel comprises a serum diffusion area, a whole blood separation area positioned above the serum diffusion area and a blood potassium detection area positioned below the serum diffusion area; a blood separation membrane is also arranged in the whole blood separation area; the substrate is qualitative filter paper, and the sensing electrode comprises an all-solid-state PBA working electrode and an Ag / AgCl reference electrode; compared with the prior art, calibration is not needed when potassium ions in whole blood are detected, the whole blood sample can be directly used, centrifugal separation is not needed, the detection speed is increased, the hemolysis problem of the whole blood sample in blood potassium detection can be avoided, and the detection sensitivity, accuracy and stability are further improved.

The invention discloses a coating die head uniform coating distribution method based on a microfluid optimization technology, which comprises the following steps: S1, analyzing the rheological characteristics and coating requirements of a coating, and designing a flexible microfluid channel structure; s2, optimizing the geometric design of the channel by adopting a lattice Boltzmann method simulation technology; s3, the interaction between the coating and the die head surface material is simulated and analyzed through molecular dynamics, and adaptive data is generated; s4, based on the optimized geometric design and the adaptive data, an intelligent dynamic adjustment module is embedded, and a dynamic adjustment mechanism is constructed; s5, synchronous and uniform coating of multiple layers of coatings is achieved through a double-layer micro-channel structure; s6, the thickness and defects of the coating are monitored in real time by combining optical and pressure sensors, and a repair path is generated by combining a parrot optimization algorithm; and S7, an active heat management module is embedded, and the heating power is adjusted to maintain the optimal flowing state of the coating. According to the method, microfluid optimization and intelligent optimization methods are combined, and coating uniformity improvement, defect real-time repair and multi-layer synchronous coating are achieved.

The invention relates to the technical field of microbial culture, and discloses a cell culture device, which comprises: a plate body; the culture units are arranged on the plate body at intervals in the width direction of the plate body, and each culture unit comprises a plurality of base holes which are arranged at intervals in the length direction of the plate body and are used for culturing cells and fluid channels which are arranged between every two adjacent base holes; according to the flowing direction of the culture medium along the fluid channels, the two sections of fluid channels corresponding to the two upward sides of each base hole are called the upstream fluid channel and the downstream fluid channel of the base hole; a downstream hole wall is arranged at least between the fluid channel at the downstream of the base hole and the base hole, and a plurality of downstream gaps allowing the culture medium to pass through and limiting the cells to pass through are formed in the downstream hole wall in a cutting manner.

The present disclosure provides methods and systems for reducing interference by one or more bubbles in a sensing assembly. Bubble prevention arrangements can use surfaces located in a fluid channel to provide surfaces with higher affinity for bubbles relative to the other surfaces so that the surface retains one or more bubbles within a bubble collection region; and / or to divert at least a portion of any bubbles passing through an opening in the fluid channel. Additionally or alternatively, bubble prevention arrangements comprise an agitation device configured to agitate liquid within the fluid channel. Additionally or alternatively, bubble prevention arrangements are configured to displace one or more bubbles in a region on or adjacent the sensing surface so as to reduce interference of one or more bubbles on the sensing surface.

The present invention relates to a manifold fluid module. A manifold fluid module according to an embodiment of the present invention may include a manifold plate comprising fluid passages formed internally, a first heat exchanger coupled to the manifold plate and configured to exchange heat between a first fluid and a second fluid, a second heat exchanger coupled to the manifold plate configured to exchange heat between the first fluid discharged from the first heat exchanger and the second fluid, and a plurality of valves configured to control expansion or direction of the first fluid entering the first heat exchanger or the second heat exchanger, wherein the plurality of valves may be clustered on an upper part of the manifold plate.

The invention relates to an ultraviolet laser focusing ionization fluid disinfection system and a disinfection machine, and the system comprises a fluid channel which is provided with a fluid inlet, a fluid outlet and a disinfection cavity, the disinfection cavity is internally provided with at least one group of optical fiber arrays, and the light emitting end of each optical fiber array is full of a cross section for fluid circulation; the output end of the ultraviolet laser emitter is connected to the input end of the optical fiber array, a focusing element is arranged at the light emitting end of each optical fiber, and ultraviolet laser is output by the optical fiber array and forms an ionization area in the disinfection cavity after passing through the focusing elements. An ultraviolet laser focusing ionization technology is adopted, an ionization focus with high energy density is formed, the ionization focus not only directly acts on fluid molecules at the focus, but also excites fluid in a peripheral area through the ionization effect, a wide ionization area is formed, harmful substances in the fluid are decomposed into harmless low-molecular compounds, and therefore the fluid concentration is improved. The efficient and thorough disinfection on the fluid is realized.

The invention discloses a curved-surface cylindrical part hydraulic forming device and method, and relates to the technical field of cylindrical part forming, the curved-surface cylindrical part hydraulic forming device comprises a die and a pressurization system, and the die comprises a male die and a female die; the female die is annular, at least part of the male die can be arranged in the female die, an annular gap between the male die and the female die is used for containing a barrel blank, a forming curved surface is constructed outside the male die or in the female die, and under the state that the barrel blank is placed, a closed inner cavity is formed between the male die and the barrel blank, and a closed outer cavity is formed between the female die and the barrel blank. The forming curved surface is a cavity wall of the inner cavity or the outer cavity; fluid channels communicated with the inner cavity or the outer cavity are formed in the male die and the female die; the pressurization system is used for filling pressure fluid into the inner cavity and the outer cavity and controlling the pressure difference between the outer cavity and the inner cavity, the invention further provides a curved-surface cylindrical part hydraulic forming device and method, and the forming size precision of the multi-layer rotary cylindrical part with the curved generatrix characteristic can be improved.

The invention relates to the technical field of petroleum and natural gas production and transportation, and discloses a throttling device and a gas nozzle replacement method.The throttling device comprises a shell, an opening and closing piece movably arranged on the shell and a detachable throttling gas nozzle assembly, the shell is provided with a fluid channel and a detachable channel which are not communicated, and a hollow channel is formed in the opening and closing piece; the throttling air tap assembly is installed in the hollow channel, the opening and closing piece is provided with an opening position and a closing position, when the air tap needs to be replaced, the opening and closing piece can be switched to the closing position, the disassembling channel is communicated, the throttling air tap assembly is disassembled and moved out of the shell, and after replacement is completed, a new throttling air tap assembly is installed on the opening and closing piece. The opening and closing piece is switched to the opening position, the fluid channel is conducted, the throttling device continues to work, and the throttling effect on flowing fluid is achieved. According to the throttling device and the air tap replacement method, the air tap can be replaced without removing the pressure of pipelines before and after the throttling device, the replacement cost is reduced, and the replacement efficiency is improved.

A liquid cooling plate is configured to be in thermal contact with at least one first heat source and at least one second heat source. The liquid cooling plate includes at least one first heat dissipation part and a second heat dissipation part. The first heat dissipation part is configured to be in thermal contact with the first heat source and has a fluid chamber. The second heat dissipation part is connected to the first heat dissipation part and configured to be in thermal contact with the second heat source. The second heat dissipation part has a fluid channel, and the fluid channel is in fluid communication with the fluid chamber.

A heat exchanger is provided with a unitary, single-piece structure that can be formed via 3D printing, for example. The heat exchanger includes a main body a plurality of plates stacked and integrally formed with the body. First fluid channels are defined by gaps in the material of the main body, and second fluid channels are defined by gaps in the material of the main body and are stacked with the first fluid channels in alternating fashion, separated by the plates. Each of the first fluid channels are fluidly coupled to an inlet manifold and an outlet manifold. A jumper pipe is fluidly coupled to and between an inlet port and the inlet manifold. In an embodiment, the jumper pipe is curved at one end thereof to intersect the inlet manifold at a generally perpendicular angle.

A fluid transfer device includes a body having a first connecting portion for connecting with a diluent container, and a second connecting portion for connecting with a medicament container. A first fluid channel extends into the first connecting portion, and a second fluid channel extends into the second connecting portion. A discharge duct is configured to connect to a discharge device. A flow control member is selectively fluidically connectable to the first and second fluid channels, the discharge duct, and a discharge channel. The flow control member is movably disposed in or on the body and is movable relative to the body between first and second control positions. In the first control position, the first and second fluid channels are in fluid communication. In the second control position, the discharge duct is in fluid communication with the discharge channel and the first fluid channel or the second fluid channel.

The invention discloses a low-flow precision detection metering method suitable for a water meter, which comprises the following steps: S1, arranging a texture coating on the surface of a fluid channel in the water meter, interacting a groove with fluid to generate periodic pressure pulsation, collecting a local pressure fluctuation signal generated when the fluid passes through the groove, and processing to obtain a first flow value; s2, full-band pressure pulsation signals at an outlet of the water meter are collected, a pressure-flow model is established, and a second flow value is obtained; s3, constructing a first fusion model, and inputting the first flow value and the second flow value into the first fusion model to obtain a preliminary fusion flow value; s4, inputting the preliminarily fused flow value and environmental parameters into a correlation model to obtain a corrected flow value; and S5, constructing a second fusion model, inputting the corrected flow value and the predicted flow value into the second fusion model, and outputting a low-flow metering result of the water meter. According to the invention, the applicability and reliability of the water meter in a low-flow scene are enhanced.

The invention discloses a nano-drug preparation system and a nano-drug preparation process. The nano-drug preparation system comprises a micro-fluidic chip, at least two feeding devices and a controller, the two feeding devices are communicated with the micro-fluidic chip and are respectively used for conveying different raw material liquids; each feeding device comprises a liquid path reversing coordination integrated block and two sucking and pushing mechanisms; the liquid path reversing coordination integrated block is provided with an input end and an output end; the two sucking and pushing mechanisms are both communicated with a fluid channel of the liquid path reversing coordination integrated block, each sucking and pushing mechanism achieves input or output of raw material liquid in a sucking or pushing mode, the driving ends of the two sucking and pushing mechanisms are both in signal connection with the controller, and the controller is used for controlling the two sucking and pushing mechanisms to alternately operate in the reverse direction; a one-way valve assembly is arranged in the liquid path reversing coordination integrated block. By means of the arrangement, the function of stably and continuously conveying raw material liquid without liquid mixing is achieved, the controllability of the preparation process of nano-drugs in the micro-fluidic chip is guaranteed, and the purpose of improving the preparation effect is achieved.

The invention discloses a vascularized tissue culture chip as well as a construction method and application thereof, and belongs to the technical field of biological tissue engineering and biological medicines. The vascularization tissue culture chip is formed by stacking five layers of sub-chips with different function requirements, a fluid channel and a culture chamber are formed, a highly integrated system is formed, and the design of a micro-column array further optimizes the fluid dynamic characteristics and reduces the dead angle effect of fluid. In-vivo microcirculation can be simulated, and a stable and controllable nutrition and metabolite exchange environment is provided for skin and liver tissue. The vascularized tissue culture chip provided by the invention provides a powerful research platform for a plurality of biomedical research fields such as personalized medical treatment, disease modeling, drug screening, toxicity testing, disease model research and the like.

The invention relates to an amniotic membrane mirror manufacturing method which comprises the following steps: S1, performing transparency and shape fixing treatment on an amniotic membrane to obtain a spherical amniotic membrane area; s2, the super oxygen permeable material is subjected to casting plasticity to obtain a transition area and a landing area which are integrated, and the landing area surrounds the transition area; wherein the transition area is aspheric and the vertical projection of the transition area is annular, and the landing area is spherical and the vertical projection of the landing area is annular; s3, a plurality of fluid channels which are arranged in a crossed mode are etched in the top of the transition area, and the multiple fluid channels form a latticed path body extending in the circumferential direction of the transition area; s4, forming a plurality of uniformly arranged nano structures in each grid region of the path main body to form a connection path; s5, the fluid channel is filled with a biocompatible adhesive, the amniotic membrane area is placed on the transition area, and the bottom edge of the amniotic membrane area abuts against the connecting path; the method has the beneficial effects that on the basis of ensuring the biological characteristics of the amniotic membrane area, the stable connection between the amniotic membrane area and the transition area is realized.

The plate-type temperature adjusting equipment comprises a box body, a plate-type temperature adjuster and a scale wiping unit, the plate-type temperature regulator and the scale wiping unit are arranged in the box body, liquid is contained in the box body, and the plate-type temperature regulator is used for being immersed into the liquid to regulate the temperature of the liquid; the plate-type thermolator is provided with a plurality of plate-shaped fluid channels which are arranged side by side at intervals from front to back, a fluid inlet hole and a fluid outlet hole are formed in the front side and the rear side of each plate-shaped fluid channel respectively, and the fluid inlet holes and the fluid outlet holes are formed in the positions, close to the left side and the right side, of the plate-shaped fluid channels respectively. And a scale wiping unit is arranged in a gap between every two adjacent plate-shaped fluid channels, and the scale wiping units continuously do reciprocating motion in the gaps through a driving unit to disturb the side walls of the plate-shaped fluid channels, so that scaling is prevented. According to the plate type temperature adjusting equipment, the temperature of fluid is adjusted, and meanwhile impurities possibly causing crystallization and scaling are removed.

A fluid connector includes a shell having a fluid channel, a ball valve accommodated in the shell and having a through hole, a control element arranged outside the shell for controlling the ball valve to rotate, and a pin member. A front end of the shell for engaging a matching connector has an engagement hole. The control element controls the ball valve between a closed position and an open position. The through hole is in fluid communication with the fluid channel when the ball valve is at the open position. A front face of the shell has an accommodating hole for accommodating the pin member. A resilient member is arranged in the accommodating hole for supporting the pin member. The pin member is adapted to be guided by a guide structure and compress the resilient member to separate from the engagement hole of the matching connector.

A gyroscopic roll stabilizer for a boat includes an enclosure mounted to a gimbal for rotation about a gimbal axis and configured to maintain a below-ambient pressure, and a flywheel assembly including a flywheel and flywheel shaft, with the flywheel assembly rotatably mounted inside the enclosure for rotation about a flywheel axis. The gyroscopic roll stabilizer also includes a motor operative to rotate the flywheel assembly and disposed inside the enclosure. A motor cooling circuit is configured to transfer heat away from the motor. The motor cooling circuit has a closed fluid pathway for recirculating cooling fluid therein. The fluid pathway includes a fluid channel jointly defined by the motor and the enclosure and having the cooling fluid therein. The gyroscopic roll stabilizer is configured to transfer heat away from the motor to the cooling fluid. Related methods are also disclosed.

A catheter comprises a catheter shaft having a fluid channel, an ultrasound transducer and a compliant balloon mounted on the catheter shaft and having an interior in fluid communication with the fluid channel and containing the ultrasound transducer. The compliant balloon includes a balloon wall having a working section radially surrounding the ultrasound transducer. The working section has a predetermined straightness when the working section has a first diameter and when the working section has a second diameter that is at least 2 mm greater than the first diameter. Other embodiments are also described and claimed.

The invention relates to a projection exposure system (1,101) for semiconductor lithography with at least one component (M3) having a fluid channel (31) and a device (41) for providing a fluid (90) for flowing through the fluid channel (31), wherein the fluid channel (31) is connected to the device (41) by a supply line (45) and a discharge line (49) and is characterized in that the supply line (45) and the discharge line (49) are connected to each other in parallel to the fluid channel (31) via an acoustic short circuit (38, 69).

A nozzle arrangement for applying fluids to a substrate has a connection body that is connectable to a distributor mounting region and has a spray nozzle that is connectable to the connection body. The spray nozzle has a nozzle body that longitudinally extends and has a first fluid channel for the fluid to be applied to the substrate. The spray nozzle has a nozzle housing in which the nozzle body is received. Second fluid channels for shaping air are formed between a lateral surface and inner of the nozzle body. The second fluid channels extend in the direction of a nozzle outlet opening of the nozzle body such that, by way of the shaping air dispensed from the second fluid channels at the nozzle outlet region, a spiral-shaped deflection of the fluid dispensed from the nozzle outlet opening of the nozzle body is created.