9results about How to "Reduced diffusion loss" patented technology

The utility model relates to the technical field of hair driers, in particular to a vertical hair drier which comprises a hair drier shell, a wind wheel assembly arranged in the hair drier shell and a base arranged at the bottom of the hair drier shell, and the wind wheel assembly comprises a wind wheel body and a first driving part used for driving the wind wheel body; a wind gathering piece connected with the inner wall of the blower shell is further arranged in the blower shell, the wind gathering piece is arranged on the outer side of the wind wheel body, the wind gathering piece comprises a first wind guide plate and a second wind guide plate which are arranged on the two sides of the wind wheel body, and a wind guide opening is formed between the first wind guide plate and the second wind guide plate; the blower shell is provided with an air inlet grid and an air outlet grid, and the air guide opening always corresponds to the position of the air outlet grid of the blower shell. According to the vertical hair drier, due to the arrangement of the wind gathering piece, airflow enters the wind wheel body and is blown out after being gathered by the wind gathering piece, and the wind gathering effect of the vertical hair drier is effectively improved.

This invention relates to the field of digital twin technology, and more particularly to a predictive maintenance platform for the entire lifecycle of a heat dissipation system based on digital twins. The platform includes: a data acquisition module; a model building module; a block partitioning module for determining whether to perform direct partitioning based on regional coupling strength or related partitioning based on heat exchange correlation, according to the fault propagation coefficient; a category analysis module for determining block categories based on temperature deviation and determining whether to adjust the block categories of the second-class blocks based on the contaminant deposition impact and fluid pressure anomaly of the second-class blocks, according to the maximum fluctuation cycle decay rate; an update analysis module for determining the update frequency of each updated block based on a comprehensive evaluation value; and an update optimization module for determining whether to perform optimization adjustments based on the block change coefficient. This invention can improve model update efficiency.

This invention provides a system for analyzing the particle size distribution and chemical composition of neutral clusters smaller than 3 nanometers. This invention further provides a method for analyzing the particle size distribution and chemical composition of neutral clusters smaller than 3 nanometers. The system and method provided by this invention, based on central sample flow sampling, achieves efficient sampling of nanoparticles. Utilizing the high charging efficiency of a unipolar charging device for nanoparticles, the nanoparticles are charged and efficiently transported to the inlet of a nanoparticle size sieving device. Through a special aerodynamic design, the nanoparticles are efficiently transported through the electric field between the electrode plates to the particle number concentration and chemical composition detectors, demonstrating excellent application prospects.

The invention discloses a hand-push type movable dustproof device for green building construction, and relates to the technical field of green building construction equipment. An existing dustproof device is inflexible to move, inconvenient to adjust dust falling angle and height and low in dust removal efficiency. The device comprises a moving structure, an adjusting structure, a dustproof structure and a water pump; the moving structure is provided with a bottom plate with moving wheels and a hand pushing frame, and overall movement is achieved. The adjusting structure comprises a horizontal steering mechanism, a height adjusting mechanism and a pitching angle adjusting mechanism, and is used for adjusting the space attitude of the dustproof structure in all directions; the dustproof structure is connected to the upper portion of the pitching angle adjusting mechanism and comprises a dust falling cover, a fan and an atomization spraying device. The water pump is arranged on the bottom plate, and a water outlet of the water pump is connected with the atomization spraying device through a water supply pipe. The device integrates the functions of movement, multi-dimensional adjustment and aerial fog cooperative dust removal, is convenient to move, can accurately control the spraying direction, height and angle, is high in dust removal efficiency, and is mainly used for raising dust treatment in green building construction.

The invention provides a heterogeneous core-shell double-enzyme cascade reactor as well as a preparation method and application thereof, and belongs to the technical field of sensing or photocatalysis. The preparation method of the heterogeneous core-shell double-enzyme cascade reactor comprises the following steps: mixing and incubating a first enzyme and a carboxylated metal organic framework in a room-temperature water phase, and washing to obtain a metal organic framework heterogeneous seed crystal loaded with the first enzyme; the heterogeneous seed crystal is dispersed in an aqueous solution of an amine monomer for pre-assembly, an aldehyde monomer, a second enzyme and an ionic liquid catalyst are added into the obtained system, a reaction is performed at room temperature, after the reaction is finished, a solid is separated and washed, and the heterogeneous core-shell double-enzyme cascade reactor is obtained. The invention aims to realize high activity maintenance of enzyme in a heterogeneous framework through a mild and biocompatible interface-oriented assembly strategy, solve the problems of a single porous material in mass transfer regulation and structural stability, and significantly improve cascade reaction efficiency and operation stability.

The utility model discloses a biological chip structure. The biological chip structure comprises a conductive base layer, the plurality of conductive salient points are distributed in an array and are formed on the surface of one side of the conductive base layer, and the conductive salient points and the conductive base layer are integrally formed; the insulating layer covers the surface of one side of the conductive base layer with the conductive salient points, an opening for exposing a part of the conductive salient points is formed in the insulating layer, the exposed part serves as an electrode point, and a gold plating layer can also be formed on the electrode point. According to the structure, electric field focusing is achieved through the array design of the conductive salient points, the working voltage requirement is lowered, and energy loss is reduced; the integrated design eliminates interface contact resistance and improves the current transmission efficiency; the design of the opening of the insulating layer accurately controls the electric field action range and enhances the space targeting; the design of a transition layer and a groove is omitted, the manufacturing complexity and cost are reduced, and the device is suitable for efficient transdermal delivery of active ingredients and is not limited to beauty and drug treatment scenes.

This application relates to the technical field of engine intake ducts, and in particular to a methanol engine intake duct efficiency improvement structure, including an intake pipe with a bent pipe fixedly installed on the left side. This invention utilizes components such as a tapered pipe, a connecting ring three, and a guide block. The tapered pipe can initially streamline and accelerate the airflow, reducing airflow diffusion loss. The guide block on the connecting ring three and the guide groove one on its outer wall can guide the airflow to a uniform distribution, avoiding local airflow congestion. The arc-shaped guide block on the inner wall of the connecting pipe two and the guide groove two on its outer wall optimize the airflow direction and reduce the flow resistance of the airflow in the pipe. The airfoil guide vane one and airfoil guide vane two fixed on the inner wall of the bent pipe can effectively reduce the vortex generated at the bend of the airflow, ensuring a smooth airflow transition. The above structure, in combination, significantly reduces the degree of airflow turbulence and flow resistance in the intake duct, increases the gas throughput per unit time, and ensures the engine's intake requirements.

The invention discloses an impeller design method for a low-specific-speed fire pump, which comprises the following steps of: calculating parameters of an impeller by adopting given design parameters of the fire pump, and obtaining the thickness delta 2 of an outlet side of the impeller by calculating an outlet displacement coefficient psi 2 of the impeller so as to increase the thickness delta 2 of the outlet side, so that a lift curve is suddenly reduced; noise and vibration, caused by the curve hump phenomenon, of the fire pump are effectively eliminated, the safety and reliability of the fire pump are improved, meanwhile, the outlet width b2, the outlet placement angle beta2 and the blade wrap angle # imgabs0 # of the impeller are determined within a certain range, so that the parameters of the impeller have the adjusting space, the outlet width b2 and the outlet placement angle beta2 are increased, and therefore the impeller can be adjusted conveniently. When the blade wrap angle # imgabs 1 # is reduced, the manufacturing difficulty of the impeller can be effectively reduced, the manufacturing cost is reduced, further, the impeller design method for the low-specific-speed fire pump can reduce diffusion loss in an impeller runner, and the efficiency of the impeller is effectively improved; and the pump shaft power is reduced, energy is effectively saved, and long-term stable operation of the pump is facilitated.

The utility model discloses an appliance for transdermal delivery of active ingredients, which comprises a main body shell and a head shell, the head shell is provided with an inner electrode and an outer electrode which are coaxially arranged, the inner electrode comprises a conductive base layer and conductive salient points which are distributed on the surface of the conductive base layer in an array mode, and an insulating layer covers a non-working area and exposes the tops of the salient points to serve as electrode points. And the main body shell adopts a modular nested structure, so that the assembly efficiency is improved. The inner electrode structure realizes electric field focusing through the array design of the conductive salient points, the working voltage requirement is reduced, and the energy loss is reduced; the integrated design eliminates interface contact resistance and improves the current transmission efficiency; the design of the opening of the insulating layer accurately controls the electric field action range and enhances the space targeting; the design of a transition layer and a groove is omitted, the manufacturing complexity and cost are reduced, and the device is suitable for efficient transdermal delivery of active ingredients and can be expanded to the fields of beauty, chronic disease treatment and the like.