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477results about How to "Lower working temperature" patented technology

Variable-gradient fractal lattice sandwiched reinforcement phase change heat sink

The invention discloses a variable-gradient fractal lattice sandwiched reinforcement phase change heat sink and aims to provide an efficient phase change heat sink which is high in heat exchange efficiency, has certain universality and can be developed in a serialization mode. The variable-gradient fractal lattice sandwiched reinforcement phase change heat sink is realized according to the following technical scheme: reinforcement heat transfer structures are distributed in a phase change heat sink shell in an array; each variable-gradient fractal lattice sandwiched unit takes a variable-gradient V structure as a first-stage reinforcement heat transfer structure (4) according to the heat transfer and heat exchange characteristics of the phase change heat sink; on this basis, at variable-gradient V-shaped ends of the first-stage reinforcement heat transfer structures, the variable-gradient V structures in the same shape are gradually increased to form multiple stages of reinforcement heat transfer structures, and the specific surface areas of the multiple stages of reinforcement heat transfer structures are multiplied in sequence; the first-stage reinforcement heat transfer structures can transfer heat to an area far away from a heat radiation bottom plate rapidly in a reinforcement mode, and the second-stage reinforcement heat transfer structures (5) and the third-stage reinforcement heat transfer structures can transfer heat to phase change material far away from the heat radiation bottom plate rapidly to complete heat exchange.

Water-cooled magnetorheological soft start device

The invention discloses a water-cooled magnetorheological soft start device, and belongs to the technical field of mechanical power transmission. The device comprises a drive rotator structure and a driven rotator structure, wherein a plurality of drive cylinders and driven cylinders are respectively plugged on drive cylinder sleeves and driven cylinder sleeves at intervals; the drive cylinder sleeves and the driven cylinder sleeves are respectively connected with left magnet-conducting shaft sleeves, right left magnet-conducting shaft sleeves, drive shafts and driven shafts through bolts; a sealing measure is arranged at each connection position; left magnetic yokes and right magnetic yokes are fixed with a magnet-conducting shell; magnet exciting coils and magnetic isolation discs are arranged in the left magnetic yokes and the left magnetic yokes; left bearing seats and right bearing seats are respectively fixed on outer sides of the left magnetic yokes and the left magnetic yokes;left bearings and right bearings used for bearing the drive shafts and the driven shafts are respectively arranged in the left bearing seats and the right bearing seats; a water inlet, a water outlet, a groove, a liquid injecting opening and a liquid discharging opening are formed in the magnet-conducting shell; a liquid injecting plug screw and a liquid discharging plug screw are arranged on theliquid injecting opening and the liquid discharging opening; and a plurality of groups of rotating sealing rings are arranged in the groove. The water-cooled magnetorheological soft start device has the advantages of compact structure, large transmission torque, high radiating performance, high slip frequency power and wide slip frequency range.

Solar photovoltaic waste heat-joule heat gradient utilization seawater desalination system

The invention discloses a solar photovoltaic waste heat-joule heat gradient utilization seawater desalination system, and belongs to the field of renewable energy source utilization. The system mainlycomprises a high-transmittance glass cover plate, a solar photovoltaic cell, heat conduction silica gel, a heat conduction aluminum plate, a seawater flow channel, an electric heating layer, a hydrophobic film layer, a condensate flow channel, aheat preservation and insulation layer a seawater storage tank, a condensate collecting tank, a washing tank and an efficient fin radiator. The system iscomposed of multiple layers of seawater desalination devices. The desalination devicesare arranged in the heat preservation and insulation layer, the high-transmittance glass cover plate, the solar photovoltaic cell, the heat conduction silica gel, the heat conduction aluminum plate, the electric heating layer, the hydrophobic film layer, the seawater flow channel, the seawater storage tank and the condensed water collection tank are sequentially arranged in the heat preservation and insulation layer from top to bottom. Waste heat and electric energy generated by power generation of the solarphotovoltaic cell are utilized, energy is utilized in situ or in a gradient mode to participate in sea water desalination, solar energy is utilized to the maximum extent, and meanwhile the evaporationefficiency and the sea water desalination capacity of the system are greatly improved.

Underwater fishing lamp for high-power blue green light LED ship

The invention relates to a submersed marine fishing lamp with a high-power blue-green LED as a luminous source. The existing auxiliary equipment used in the luring and fishing of fishes mainly adopts a metal halide lamp which has wide light source wavelength range, after filtration in the sea, the remaining blue-ray component is little and the other colors are all absorbed by the seawater, thus causing great waste of energy resource. The purpose of the invention is to provide the submersed high-power blue-green LED marine fishing lamp. The structure of the invention consists of a high-power blue-green LED arranged on a lamp body; in the lamp body, an upper shell is fixed on the upper end of a main shell which is sequentially fixed with a circulating water insulated tube, a lower shell, a glass cover and a protecting cage from inside to outside; both the external surfaces of the lower shell and a lower baffle are fixed with a high-power blue light LED, the cable plywood used in the upper shell is fixed and connected with a power board. The application of the lamp is that the fishes in the sea are gathered by the blue-green light with the wavelength from 465nm to 490nm given out by a light source module, thus achieving the purposes of saving energy and improving the efficiency of fishing.

Graphene/molybdenum disulfide compounding-based gas sensitive material and preparation method thereof

The invention discloses a graphene/molybdenum disulfide compounding-based gas sensitive material and a preparation method thereof, relates to a gas sensitive material and a preparation method thereof, and aims at solving the technical problem that intrinsic graphene gas sensor nanoparticles only have high sensitivity for a few gases. The outer surface of graphene is coated by molybdenum disulfide. The preparation method comprises the following steps: I, cooling concentrated sulfuric acid, adding natural flake graphite and potassium permanganate, stirring, adding a mixed solution formed by hydrogen peroxide and distilled water, centrifuging and cleaning, and dissolving a precipitate in deionized water to obtain a solution; and II, dissolving sodium molybdate, cysteine and sodium hexadecyl benzene sulfonate in distilled water, adding the solution obtained in the step I, placing in a reaction kettle, and carrying out centrifugal cleaning and freeze drying to obtain the graphene/molybdenum disulfide compounding-based gas sensitive material. The composite material is high in selectivity and sensibility. The graphene/molybdenum disulfide compounding-based gas sensitive material and the preparation method thereof belong to the field of preparation of gas sensitive materials.

Preparation method of ethanol gas sensor component having ultrafast response recovery property

The invention discloses a preparation method of an ethanol gas sensor component having an ultrafast response recovery property. In the preparation method, LaFexO3 nano particles in non-stoichiometric ratio prepared through a sol-gel method are employed as a working substance to prepare a beside-heating-type ceramic tube gas sensor component. By means of reduction of a relative element ratio of iron to lanthanum in a precursor, the carrier concentration is increased and the resistance of the component is reduced. By means of selection of a proper La/Fe element ratio, size of crystal grains is reduced and oxygen adsorption capacity is improved, so that the gas sensor is improved in sensitivity on ethanol, is reduced in working temperature and is reduced in response recovery time. A LaFe0.8O3 beside-heating-type ethanol gas sensor prepared in the invention can reach 138 in the sensitivity on ethanol in 1000 ppm at the working temperature of 140 DEG C, wherein the response and recovery times are respectively 1 s and 1.5 s. The gas sensor is less than 22 in all sensitivities on methane, acetone, carbon dioxide and glycerol in 1000 ppm. The gas sensor is high in sensitivity, is low in the working temperature, is ultrafast in response recovery property and is high in selectivity at the same time on ethanol, and is low in cost and is environmental-friendly.
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