53results about How to "Control the evaporation rate" patented technology

The invention discloses a coating machine crucible device. The coating machine crucible device (100) comprises a bucket-shaped structure (112), a plurality of heaters (120), a crucible (110), a plurality of temperature sensors (160) and a plurality of driving mechanisms (200), wherein the heaters (120) are longitudinally distributed in the bucket-shaped structure (112) and are used for heating materials in the crucible (110), the temperature sensors (160) are longitudinally distributed in the crucible (110) and are used for measuring the temperature in the crucible (110), and the driving mechanisms (200) are used for driving at least one heater (120) in multiple heaters (120) to longitudinally move so as to control the temperature distribution in the crucible (110). According to the coating machine crucible device, by changing the longitudinal distribution density of the heaters, the longitudinal temperature distribution of the crucible can be controlled, and then the evaporation velocity is controlled and stabilized.

The invention discloses a device used for rapidly drying a product formed through hard alloy. The device comprises a furnace body. The wall of the furnace body is provided with a water bath cavity. The water bath cavity is connected with a hot water tank through a water pump. Thermocouples are installed on the left portion, the middle and the right portion of the bottom of an inner cavity of the furnace body correspondingly and are connected with three temperature displayers on the furnace body in a one-to-one correspondence mode. A pressure gage used for testing the pressure value of the inner cavity of the furnace body is further installed on the furnace body. The furnace body is further provided with a first opening. The first opening is connected with a rotary vane pump through a pressure adjusting switch so that the pressure of the inner cavity of the furnace body can be adjusted through the pressure adjusting switch. According to the device used for rapidly drying the product formed through the hard alloy, the temperature and the pressure of the furnace body are monitored, and the temperature condition and the pressure condition of forming agent volatilization are combined; the pressure in a drying furnace is controlled through the opening degree of a valve and can be controlled in different temperature stages of drying; and accordingly, the volatilization speed of a forming agent is controlled, and then the purpose of rapidly drying the product (that is, an extrusion billet produced through hard alloy extrusion forming) formed through the hard alloy is achieved.

The invention discloses a photovoltaic power generation device capable of efficiently cleaning in a linkage way. The photovoltaic power generation device comprises an installation seat, wherein a plurality of solar cell pieces are arranged on the installation seat and comprises printed silver electrode grid lines, a main rotation shaft and at least one secondary rotation shaft are vertically arranged in the installation seat in a penetrating way, upper ends of the main rotation shaft and the secondary rotation shaft extend out of the installation seat and are respectively and horizontally connected with cleaning strip brushes, and lifting rotation adjustment assemblies are connected with lower ends of the main rotation shaft and the secondary rotation shaft. Compared with the prior art, the photovoltaic power generation device is compact in structure, lifting driving and rotation driving are efficiently combined, omnibearing cleaning on a surface of the solar cell panel and the storageof a cleaning tool can be stably and reliably achieved, the equipment complexity is reduced, cleaning brush heads on the cleaning strip brushes can rotate with the shafts to automatic finish the cleaning process, the cost is reduced, and the energy conversion efficiency is improved; and the solar cell piece is low in series resistance and high in photoelectric conversion efficiency, conforms to an environmental-protection concept and has a wide application prospect, and the new energy development demand is satisfied.

The invention discloses an asymmetric polyimide pervaporation film for separating methyl cyclopentadiene and cyclopentadiene homologs. The repeating unit of the asymmetric polyimide film is condensed from a bisphenol A structure and a phenylate structure, and the asymmetric polyimide film is in a multilayer asymmetric structure with a compact skin layer and a regular porous spongy layer. The asymmetric film is preferentially permeable to cyclopentadiene, and can separate methyl cyclopentadiene and cyclopentadiene homologs and purify methyl cyclopentadiene. The cyclopentadiene separation factor of the asymmetric polyimide film prepared under the optimum conditions can reach 2.1, and the permeation flux is 1003 g / m<2>.h, and thus, the asymmetric polyimide film can be used for purifying and producing 95% methyl cyclopentadiene. The film separation method for purifying methyl cyclopentadiene has the advantages of simple equipment, high separation efficiency, low energy consumption, no pollution and the like. The film preparation technique is simple; and the film has the advantages of low material price, high cyclopentadiene selectivity and high permeation flux.