60results about How to "Little change in temperature" patented technology

The invention discloses a planting method for tea-oil trees. The method comprises the following steps of: (1) selecting soil and an area, building horizontal steps on a slope around a mountain, digging drainage ditches on the inner sides of the steps, and digging pits at fixed points according to a planting distance, wherein the pits are arranged to form delta shapes; (2) after the pits are dug, properly applying garbage tankage, rice straws, dicranopteris pedata and farmyard manure, wherein base fertilizers are required to be deeply applied; (3) during the blossoming of the tea-oil trees, marking early blossoming type plants of a selected tea-oil tree variety, selecting high-yield and high-premonition plants from the marked plants when fruits are matured in the next type, and picking mature and full tea-oil tree seeds; (4) sowing the seeds from every early November to February of the next year, wherein germination is accelerated and the seeds are sown after the seeds are sterilized; (5) after the seeds come up, selecting seedlings, and filling gaps with the seedlings; and (6) after the tea-oil trees are fruited, applying the farmyard manure and a compound fertilizer or a phosphate fertilizer, a potash fertilizer and urine in every May to July. The problems of irrational structure of a planting structure, low oil yield, shortage of scientific management and the like of the conventional tea-oil tree planting process are solved.

The invention discloses a single-tank heat storage device with a phase change heat storage function. The single-tank heat storage device with the phase change heat storage function comprises a single-tank heat reservoir, heat insulation boards, a phase change heat storage device, a heat release coil heat exchanger, a heat supply device and a heat transferring device, wherein the outer top of the single-tank heat reservoir is provided with a heat storage medium inlet; the outer bottom of the single-tank heat reservoir is provided with a heat storage medium outlet; the heat insulation boards are arranged inside the single-tank heat reservoir and are coaxial with the single-tank heat reservoir; the phase change heat storage device is arranged in the heat insulation boards, fixed inside the single-tank heat reservoir through a tube plate and filled with phase change heat storage media; the heat release coil heat exchanger is arranged on the upper portion of an annular channel formed by the heat insulation boards and the single-tank heat reservoir; an outlet and an inlet of the heat release coil heat exchanger are connected with a heating medium inlet and a heating medium outlet of an energy utilization device respectively; the heat supply device is arranged outside the single-tank heat reservoir; the heat transferring device is arranged at the bottom in the single-tank heat reservoir and connected with the heat supply device. The single-tank heat storage device with the additional phase change heat storage function has the advantages that the structure is simple, the heat storage capacity is increased, the heat release process is stable, and the working temperature range is wide.

The invention relates to a method for automatic gain compensation and linearity control method of a power amplifier and a device thereof. The method comprises the following steps: a radio frequency signal is converted into an electrical signal and sent to a control unit so as to judge an output power; the temperature detection is conducted for a temperature detecting unit through the control unit; when temperature changes, the control unit conducts the gain amplification for a bias voltage value of a power amplifier tube, which is obtained by adding a voltage value smaller than the bias voltage value 1V of the power amplifier in normal operation, a grid voltage value of the power amplifier which needs to be compensated under the condition of real-time temperature and a grid voltage value which needs to be compensated under the corresponding power output by the power amplifier, and corrects and compensates for a grid of the power amplifier tube when the temperature changes through a determinate linearity curve of temperature compensation of the power amplifier tube. The invention can ensure that the linearity indication of the power amplifier is little impacted by the temperature, and the power of the amplifier is between 1dB compression point and backing 9 dB. Furthermore, linearity always keeps an optimal parameter.

The invention discloses a compressed air energy storage system which comprises a motor, an air compression unit connected with the motor, an air storage chamber storing compressed air and a temperature controller controlling the temperature inside the air storage chamber. A water atomizing and spraying mechanism used for keeping the temperature inside the air storage chamber stable and a temperature sensor used for measuring the temperature inside the air storage chamber. The air compression unit is used for sucking in air, and after the air is compressed, the air compression unit delivers the compressed air to the air storage chamber through an air channel to be stored. The temperature controller is connected with the temperature sensor so as to receive signals of the temperature sensor. The temperature controller is arranged in a pipeline connected with the water atomizing and spraying mechanism so as to control the work state of the water atomizing and spraying mechanism according to the signals, guarantee that the temperature of the air inside the air storage chamber is kept in a relatively stable temperature interval all the time, prevent frequent alternation of heat and cold of the inner wall of the air storage chamber and guarantee that the air storage chamber is safe and stable.

The invention discloses a doped tin oxide material with near infrared reflection performance and a preparation method of the doped tin oxide material and belongs to the technical field of infrared reflection materials. Doped tin oxide has the general formula of MxTO, wherein M is a metal element with a near infrared reflection characteristic, and X denotes the mole ratio of M to Sn in the raw materials and ranges from 0.01 to 0.10. The prepared M-doped tin oxide product has high infrared reflection capability, can effectively insulate heat in an infrared ray reflection manner, the change of surface temperature of the material is small, and the heat insulation property is excellent. The preparation process is easy to control, equipment is simple and easy to operate, and the prepared producthas high purity, small particle size and narrow distribution range, is not prone to agglomeration and is excellent in weather fastness, low in actual application cost and easy to popularize.

The multicomponent granular urea contains urea 60-80 wt%, ammonium sulfate 10-20 wt% and dolomite 10-20 wt% and has grain size of 2-4 mm. The production process includes evaporation of urea solution, preheating of ammonium sulfate and dolomite, mixing, granulation, cooling and packing. the multicomponnet granular urea can introduce S, Mg and Ca elements for the growth of crop while providing urea component, regulate soil nutrients and raise crop yield. It has delayed release function and high fertilizer effect.

The invention discloses a separation method of ethylene cracking gas through full temperature range-pressure swing adsorption and relates to the technical field of preparation of ethylene, propylene, hydrogen and the like and gas separation through pressure-swing adsorption. The separation method disclosed by the invention solves the problems existing in a sequential ethylene cracking gas separation (cryogenic distillation) method that the self energy of raw material gas cannot be fully utilized, the energy consumption in the separation process is higher, the product and recovery component purity or the yield are lower, and the like, and changes that a traditional pressure-swing adsorption method is only limited to the auxiliary effect of refined purification of ethylene tail gas and becomes basic separation unit operation as equally important as cryogenic distillation separation.

The invention discloses a bidirectional double-helical cooling water jacket which comprises a water jacket body, a water jacket shell and a water jacket end cover. The water jacket body comprises twohelical water channels; the two helical water channels are helically distributed on the water jacket body and form a double helical structure in the space; the water jacket shell and the water jacketbody are matched; and the water jacket end cover is used for fixing the water jacket shell and the water jacket body. Compared with the prior art, the invention provides an arrangement manner of the helical water channels, the water channels are helically distributed on the water jacket body, and cooling water flows in the helical water channels along the helical directions, so that the temperature change of the cooling water is little in the circumferential direction, and the problem that an electric spindle is heat-radiated nonuniformly in the circumferential direction is solved; and meanwhile, the two helical water channels are adopted for working independently, and the two helical water channels with the double helical structure in the space compensate for each other in the axial direction, so that a cooling effect on the cooling water jacket in the axial direction is uniform, and the problem that the electric spindle is heat-radiated nonuniformly in the axial direction is solved.

The invention discloses an asphalt mixing device, and relates to the technical field of asphalt production and processing. A vertical lifting device is fixedly connected with a mixing box, the vertical lifting device can lift asphalt on the bottom layer in the mixing box to the surface layer, and a second heating device can heat the asphalt in the vertical lifting device. A stirring shaft is rotatably connected into the mixing box around a vertical shaft, a plurality of stirring rods are fixedly arranged on the circumferential face of the stirring shaft, a heating cavity is formed in each stirring rod, and a heating rod is fixedly installed in each heating cavity. A smashing device is fixedly arranged at the top of the mixing box, and a vibration screening device is arranged below the smashing device. A collecting disc is arranged below the vibration screening device and can collect screened ingredients, a first hopper is arranged below a discharging port of the collecting disc, the first hopper is fixedly arranged at the top of the mixing box and is communicated with the mixing box, and a third heating device is fixedly arranged on the outer surface of the first hopper. The heating effect is good, mixing is more uniform, and the finished product quality is guaranteed.

The invention discloses a process for firing jun porcelain by the aid of temmoku brown golden glaze. The method includes four steps of pre-firing plain bodies with the temmoku brown golden glaze in a kiln; firing the plain bodies in oxidizing atmosphere; firing the plain bodies in reducing atmosphere; cooling the plain bodies to obtain the jun porcelain with the temmoku brown golden glaze. A step of preserving heat is further carried out between the step of firing the plain bodies in the reducing atmosphere and the step of cooling the plain bodies. The step of preserving the heat includes reducing the internal temperature of the kiln from the original 1280 DEG C to 1260-1270 DEG C within 5 min; preserving the heat for 1 h. The process for firing the jun porcelain by the aid of the temmoku brown golden glaze has the advantages that iron elements and sodium elements in the glaze interact with one another, the step of preserving the heat is additionally carried out in a firing procedure, accordingly, glaze colors of fine golden temmoku patterns appear on deep red ground colors, the glaze and the process are greatly innovated, and an economic benefit of the jun porcelain can be increased; the advanced level of manufacturing processes in China are represented by the jun porcelain which is a characteristic of China, and social value of the jun porcelain can be increased.

The invention discloses a household sewing machine mechanical clutch electromechanical clutch motor, which comprises a motor casing, the bottom plate of the motor casing is fixedly connected with a support base, the motor casing is provided with an installation cavity, and the motor casing is provided with a The first installation groove connected with the cavities, the inner wall of one side of the first installation groove is provided with an installation hole, the first installation groove is provided with a rotating shaft, one end of the rotating shaft is fixedly sleeved with a pulley through the installation hole, and the rotating shaft The end away from the pulley extends into the installation cavity, the extension end of the rotating shaft is threadedly connected to the limit nut, the end of the rotating shaft close to the limit nut is slidably sleeved with a clutch driven disc, and the motor rotor is arranged in the installation cavity. The invention has a reasonable structural design, and the quick start and stop device of the clutch is controlled by the foot pedal, while the rotor speed of the motor is kept stable, the temperature of the motor does not change much, and the service life of the motor is improved.

The invention discloses an open-type heat pump water heating device based on air circulation. A heat regenerator is arranged in the device and connected with a first air compressor, the exhaust end ofthe first air compressor is branched into two air pipelines which are respectively connected with the air incoming end of an air pressing part and that of a second air compressor, and the exhaust endof the second air compressor and that of the air pressing part are communicated with a first inlet and a second inlet of an air three-way joint; an outlet of the air three-way joint is connected withan air incoming pipe of an air/water heat exchanger, an air outgoing pipe of the air/water heat exchanger is connected with the second air incoming end of the heat regenerator, the second exhaust endof the heat regenerator is connected with the air incoming end of a turbine part, and the exhaust end of the turbine part is communicated with atmosphere. A water pipeline is arranged into the air/water heat exchanger to be heated by air, and the open-type heat pump water heating device can prepare building heat-supply water and domestic hot water higher than 60 DEG C in cold and chilly regions.

The invention discloses an anti-deformation foot roll combination device for a sector section of a large square blank. A through hole penetrates the two ends of a whole center shaft with the center line of the center shaft as the center. The through hole comprises a water inlet and a water outlet. The end, close to the water inlet, of the center shaft is provided with a first end cover board. The end, close to the water outlet, of the center shaft is provided with a second end cover board. A first foot roll, a second foot roll, a third foot roll and a fourth foot roll are sequentially arranged between the first end cover board and the second end cover board in a sleeved manner. A first locating ring is installed at the joint of the first foot roll and the second foot roll. A shaft ring is arranged at the joint of the second foot roll and the third foot roll. A second locating ring is installed at the joint of the third foot roll and the fourth foot roll. The invention further discloses an application method of the anti-deformation foot roll combination device for the sector section of the large square blank. When just delivered out of a crystallizer, a casting blank is guided. The combination device can guarantee that the casting blank can be smoothly guided into the sector section in the continuous casting process and the casting blank cannot be scratched or indented.

The present invention relates to a cylindrical battery case cutting method, which comprises: annularly cutting both ends of a cylindrical battery case and linearly cutting along the axial case of the cylindrical battery by using a laser device, wherein the battery case is opened in a stretch manner after the annular cutting and the linear cutting are performed on the cylindrical battery case so as to easily take out the electric core of the cylindrical battery. According to the present invention, with the application of the laser to cut the battery case, the advantages of rapidness, low noise and less damage on the electric core can be achieved, the large-scale automatic production can be formed, and after the battery case is cut, the case material is completely separated in advance so as to drastically reduce the consumption of the wet recovery extractant and maximize the recycling benefits.

The invention discloses a medium material for ceramic capacitors, which belongs to the technical field of electronic materials. The medium material is mainly prepared from the following materials in parts by weight: 15 to 25 parts of strontium carbonate, 15 to 25 parts of barium carbonate, 25 to 35 parts of butyl titanate, 0.2 to 0.4 parts of zirconium n-butoxide, 0.5 to 0.8 parts of glass fibers,0.2 to 0.3 parts of manganese nitrate and 0.3 to 0.5 parts of polyethylene glycol. The material is prepared by adopting a sol-gel method, the final product has excellent dielectric property, change caused by the influence of temperature is minor, and the cost is low.

The invention discloses an air-circulating open-type heat pump heat-supply method. Cold air in an atmospheric environment is preheated in a heat regenerator prior to entering a first air compressor and is discharged from a discharging end after compression heating-up; discharged air is divided into two branches, one branch of the air enters a second air compressor and then enters a first inlet ofan air tee joint after compression heating-up and pressure rise; the other branch of the air enters an air pressing part and then enters a second inlet of the air tee joint after compression heating-up and pressure rise; the two branches of air are mixed in the air tee joint prior to entering an air/water heat exchanger through an air inlet pipe of the air/water heat exchanger; high-temperature high-pressure air heats circulating water in a water pipeline in the air/water heat exchanger. By one-stage preheating and two-stage compression for preparation of high-temperature air, heating of circulating water is completed through heat exchange, and preparation of hot water at 60DEG C or above for daily life and building heat supply in cold and severe cold regions can be realized.

The invention discloses a modified asphalt composition, which is prepared from the following raw materials in parts by mass: 11-14 parts of waste tire rubber powder, 10-12 parts of polyethylene waste, 9-15 parts of terpene resin, solvent oil 6‑8 parts, 2‑4 parts of alcohol ether carboxylate interface agent, 4‑6 parts of potassium chloride, 5‑7 parts of m-nitrophenol, 6‑8 parts of sodium dodecylbenzenesulfonate, tetraethyl 3‑5 parts of ammonium chloride, 6‑8 parts of cetyl tributylphosphine bromide, 7‑9 parts of diethylaminoethanol hexanoate, 3‑4 parts of praseodymium trifluoroacetylacetonate, glycidyl methacrylate 5-7 parts of ester copolymer, 4-6 parts of sulfur. The invention has strong crack resistance, little change due to temperature influence, strong adhesion, and is not easy to fall off.

The invention discloses a liquid-leakage preventing and bearing type solar heat collector, which is formed by the combination of a belt bearing union collection box, a plurality of metal heat collecting pipes and a plurality of glass vacuum insulating pipes. A bearing inner container is provided with a container wall reinforcing bar, a liquid inlet, a liquid outlet and a plurality of liquid-passing ports; the opening end of the metal heat collecting pipe is hermetically connected with the liquid-passing ports of the bearing union collection box through screw threads or other ways; and the glass vacuum insulating pipe is a transparent glass vacuum pipe which is sleeved outside the metal heat collecting pipe and is inserted into an insulating layer of the bearing union collection box.