7results about How to "Volume change" patented technology

The application discloses a smoke collecting structure of an oil fume extractor and the oil fume extractor. The smoke collecting structure comprises a smoke collecting cover, a smoke collecting cavity is arranged in the smoke collecting cover, at least one telescopic body capable of being telescopically extended outwards or telescopically retracted inwards relative to the smoke collecting cavity is arranged on the smoke collecting cover, and the telescopic body is used for changing the volume of the smoke collecting cavity. The volume of the smoke collecting cavity can be changed by arranging the telescopic body capable of being telescopically extended outwards or telescopically retracted inwards relative to the smoke collecting cavity on the smoke collecting cover, and the application range of the oil fume extractor is enlarged. The application further provides an oil fume extractor which comprises a machine box and further comprises the smoke collecting structure of the oil fume extractor arranged at the bottom of the machine box.

The utility model provides a silencing exhaust pipe of a motorcycle, belongs to the technical field of motorcycle components, and solves the technical problems that an existing silencing exhaust pipe is poor in silencing effect, cannot balance exhaust back pressure and the like. Comprising an air outlet end cover piece and an air inlet end cover piece, an exhaust pipe is arranged between the air outlet end cover piece and the air inlet end cover piece, a flow guide piece, a baffle piece and a ventilation silencing piece are sequentially arranged in the exhaust pipe from front to back, an air outlet pipe is arranged between the air outlet end cover piece and the ventilation silencing piece, and a flow guide pipe is arranged between the ventilation silencing piece and the baffle piece. According to the utility model, multiple times of volume mutation can be carried out, density and pressure are reduced, noise is weakened, flowing direction can be changed, kinetic energy is reduced, turbulent flow can be generated, noise is counteracted while exhaust efficiency is ensured, waste gas can be divided into a plurality of fine air flows, and the generated noise is absorbed and counteracted through a resonance effect, so that a drainage channel can be formed, condensate water can be discharged, and corrosion is avoided; pressure mutation can be relieved, exhaust back pressure is balanced, and noise can be reduced conveniently.

The utility model relates to the technical field of charging equipment, in particular to a wearable power bank which comprises charging main bodies, connecting assemblies are arranged at the two ends of each charging main body, first charging ports are formed in the two sides of each charging main body, and the first charging ports in every two adjacent charging main bodies are connected through a transmission line. The first charging port is connected with the transmission line in an inserted mode. According to the utility model, the elastic band, the connecting block, the clamping block and other components are arranged, the connecting block component, the clamping block component and the elastic band are matched with each other in the use process, so that the two charging main bodies are connected, and meanwhile, the transmission line is matched with the charging port I, so that the two adjacent charging main bodies are connected into a whole; and then the corresponding number of charging main bodies are connected end to end, the user can conveniently wear the device on the hand, meanwhile, the number of the charging main bodies can be adjusted according to actual needs, the overall size of the device is changed, and the user experience is improved.

This invention belongs to the field of medical testing supplies technology, specifically relating to a mixing-type virus sampling and extraction tube. The tube includes a tube body with an opening at the top, the top of which is covered with a sealing film. A cap is connected to the top of the tube body for sealing the top. The cap has a dropper nozzle with a drip channel communicating with the inside of the tube body. A side channel is also provided inside the dropper nozzle, communicating with the drip channel. A trachet is located on the cap, passing through the drip channel and the side channel. The outer diameter of the trachet is smaller than the inner diameter of the drip channel. One end of the trachet is connected to an air bladder, and the other end is connected to an inflation bladder. The air bladder and inflation bladder are located on opposite sides of the cap. In this invention, the air bladder is inflated / deflated, causing a change in its volume, which in turn compresses and stirs the test solution inside the tube body, ensuring uniform mixing of the sample and lysis buffer and guaranteeing accurate test results.

This invention provides a passive magnetorheological damper with adjustable swing gap, comprising a cylinder, a piston rod, and a piston assembly. The cylinder includes a cylinder barrel with openings at both ends along the axial direction and end caps respectively connected to the openings of the cylinder barrel. The piston assembly is slidably disposed within the cylinder barrel. The connecting end of the piston rod is connected to the piston assembly, and the free end of the piston rod extends axially through the end caps. The piston assembly includes a piston end cap and several damping components distributed circumferentially on the piston end cap. The connecting ends of the damping components are hinged to the piston end caps, and the free ends of the damping components can be driven to move away from the inner wall of the cylinder barrel. The invention also includes an adjustment component disposed within the cylinder barrel, which drives the free ends of the damping components to swing away from the inner wall of the cylinder barrel around the hinge point. This damper requires no external power supply or sealing element, has a mechanically adjustable swing gap, a compact structure, and a large output damping force, which is beneficial for the further promotion and application of magnetorheological technology.

This invention belongs to the field of black phosphorus preparation technology, and particularly relates to a method for preparing black phosphorus thin films with controllable thickness based on CVT. The technical problem to be solved is the technical challenge of large-size film growth in the industrial preparation of black phosphorus. Key technical points: S1, Selecting a "Z-shaped" quartz tube as the reaction vessel; S2, Preparing an epitaxial growth substrate with lattice-inducing ability; S3, Loading the quartz tube with the high end as the raw material conversion zone and the low end as the epitaxial growth zone; wherein, loading the raw material conversion zone involves placing a mixed phosphorus source and mineralizer at the high end of the quartz tube; loading the epitaxial growth zone involves placing the substrate at the low end of the quartz tube; S4, After vacuum sealing the quartz tube, a seed layer is generated, and under the induction of the seed layer, black phosphorus grows laterally along the surface of the substrate; S5, Cooling the quartz tube to room temperature at a certain cooling rate to obtain a cooled black phosphorus film of a certain thickness.

The present invention relates to a method (100) for determining the properties of a sample fluid in an IVD analyzer (10), the method comprising the steps of: introducing (110a) a first fluid (1) into a fluid system (35) of the IVD analyzer (10), wherein the fluid system (35) includes a channel (4) having an elastic sealing element configured to change the cross-section of the channel (4) in response to a change in local pressure state; introducing (110b) a sample fluid (2) spatially separated from the first fluid (1) into the fluid system (35); contacting (120) a conductivity sensor unit (5) in the channel (4) with the first fluid (1); and using the conductivity sensor unit (5) to detect (130) the first fluid (1) during a conductivity detection time span (cdts). A set of conductivity parameter values, wherein the conductivity parameter values ​​depend on the cross-section of the channel; and the properties of the sample fluid (2) are automatically determined (150) based on the detected set of conductivity parameter values ​​of the first fluid. This invention can be considered efficient, environmentally friendly, and adds significant value to existing IVD fluid sensor systems. Importantly, patients benefit from the additional parameters available from the IVD system. Because this invention allows for adding value and functionality to existing IVD systems without adding additional components, it can be considered very environmentally friendly in the sense of a green invention.