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466results about How to "Fast cooling" patented technology

Refrigerator

The invention discloses a refrigerator, which comprises a refrigerator body, an evaporator, a heat exchanger, an air inlet air flue, an air return air flue, a refrigerating fan, an electric air door, a temperature detector and a controller, wherein the heat exchanger is arranged in a cold-storage compartment and is further provided with an air inlet opening and an air return opening; one end of the air inlet air flue is communicated with the air inlet opening; the other end of the air inlet air flue is further communicated with a refrigerating compartment; one end of the air return air flue is communicated with the air return opening; the other end of the air return air flue is further communicated with the refrigerating compartment; the refrigerating fan is arranged in the refrigerating compartment and is used for conveying cold air in the refrigerating compartment into the heat exchanger; the electric air door is arranged in one of the heat exchanger, the air inlet air flue and the air return air flue and is used for regulating the air quantity entering the heat exchanger from the refrigerating compartment; the temperature detector is arranged in the cold-storage compartment; and the controller is respectively connected with the temperature detector and the electric air door, so as to control the opening angle of the electric air door according to a temperature value detected by the temperature detector. According to the embodiment of the invention, the refrigerator has excellent moisturizing performance and freshness-preserving performance.
Owner:HEFEI MIDEA REFRIGERATOR CO LTD +1

Energy-saving environment-protecting abrasion-proof canned carbon-hydrogen refrigerant

InactiveCN101270274ASolve the problem of cylinder wear and tearLittle effect of loadChemical industryHeat-exchange elementsAlkaneSolubility
The invention relates to an energy-saving environmental-protection type abrasion resistant canned hydrocarbon refrigerant, which comprises propane and isobutane. The energy-saving environmentally-protective abrasion resistant canned hydrocarbon refrigerant is characterized in that the energy-saving environmentally-protective abrasion resistant canned hydrocarbon refrigerant further comprises low temperature refrigeration lubricating oil; the propane accounts for 54 to 65 percent; the isobutane accounts for 30 to 40 percent, and the low temperature refrigeration lubricating oil accounts for 3 to 8 percent. The hydrocarbon refrigerant is prepared by mixing mixed alkane with certain proportion and the low-temperature refrigeration lubricating oil in proper amount, thus effectively solving the problem of the prior hydrocarbon refrigerant that a compressor is abraded frequently and a cylinder bore is scuffed frequently due to the characteristics of being too dry and excellent oil solubility, The hydrocarbon refrigerant with mixed alkane disclosed by the invention belongs to natural working fluid, is free of fluorine without influence on warming-up of the global climate. Compared with R12 and R134a, the freezing point is lower; the latent heat of vaporization is larger; the specific energy of constant entropy compression is smaller so that the compressor works more easily. The flowing property is better; the delivery pressure is lower; the load of the compressor is lower; fuel consumption is reduced and the energy-saving rate can reach 10 percent to 20 percent when the air conditioners are running.
Owner:周飞

Reliable arcing system of non-polarity high-voltage direct current contactor

The invention discloses a reliable arcing system of a non-polarity high-voltage direct current contactor. The reliable arcing system of the non-polarity high-voltage direct current contactor comprises a sealed contact chamber of the contactor and at least two permanent magnets, wherein two fixed contacts are fixedly installed in the contact chamber, two normally-opened movable contacts are movably installed in the contact chamber, and the two movable contacts and the two fixed contact are matched correspondingly in the vertical direction respectively; the permanent magnets are installed on the side of the extension line of the connection line of the two fixed contacts, and the magnetic direction of the permanent magnets is set not to be perpendicular to the current direction between the movable contacts and the fixed contacts. The arcing magnets and heat dissipation grid pieces of a special structure are arranged in the contact chamber of the direct current contactor, so that the electric service life of load switching can be prolonged by more than ten times, meanwhile, the non-polarity requirement of the contacts is met, and the contactor of the working voltage of 200-1000V can really meet the requirement for service life of whole matched equipment.
Owner:ZHEJIANG HONGZHOU NEW ENERGY TECH

Casting method of movable and fixed vortex casting pieces of compressor

The invention provides a casting method of movable and fixed vortex casting pieces of a compressor, aiming at solving the technical problem that the movable and fixed vortex casting pieces generate loosing and shrinkage at the hot joint in the casting process. The casting method comprises the following steps: embedding a conformal cold iron into the hot joint of the casting piece at the corresponding position of a core box, then carrying out sand shooting and manufacturing a sand core with the conformal cold iron; and placing the sand core with the conformal cold iron into a casting mold, combining a dead head feeding technique and casting the casting piece. The shape of the conformal cold iron is manufactured into a vortex shape or an arc shape according to the shapes of a vortex sand core teeth and the position of the hot joint of the vortex casting piece. One end of the conformal cold iron is provided with a columnar positioning lag; and the core box is provided with a positioning hole matched with the positioning lag. The sand core is internally provided with the conformal cold iron which is directly applied on the hot joint, thus having fast cooling speed and leading the hot joint position to obtain maximum subcooled temperature in the vortex casting piece. The casting method can effectively solve the defects of loosing and shrinkage of the root part of the vortex teeth.
Owner:山西华翔同创铸造有限公司

Vehicle self-contained refrigeration machine set

The invention discloses a vehicle self-contained refrigeration machine set, which comprises: a power system, a control system, a refrigeration system and an electrical heater set, wherein the power system is connected with the control system, the power system is used for supplying the control system with electric power and is controlled by the control system; the control system is connected with the refrigeration system and the electrical heater set, the control system collects working parameters of the refrigeration system and the states of a refrigeration box, generates a control signal after data processing and adopts the control signal to control the operations of the refrigeration system and the electrical heater set. Driven by an alternating current variable frequency motor or a direct current variable frequency motor, the machine set adopts a low-speed starting compressor, therefore the current is small when the machine set is started, and no impact on an engine system is caused, thus the allowance in selecting style of diesel engine is reduced, a generator set with smaller model is selected, and fuel consumption is reduced. In addition, by adopting an electrical heating manner to produce heat and to deforest, design of the refrigeration system is greatly simplified, and the heat producing and the deforesting are realized directly and simply.
Owner:王军 +2

Electroslag smelting casting method of fixed blades of water turbine

The invention relates to an electroslag smelting casting method of fixed blades of a water turbine. Consumable electrodes are prepared by adopting a voltaic arc furnace refining method and the fixed blades are prepared by adopting an electroslag smelting casting process through a mould. The chemical components of the consumable electrodes are controlled as follows: C is 0.14-0.19 percent, Si is less than or equal to 0.6 percent, Mn is 1.5-1.9 percent, P is less than or equal to 0.035 percent, S is less than or equal to 0.035 percent, V is 0.02-0.15 percent, Nb is 0.015-0.06 percent, Ti is 0.15-0.25 percent, Al is more than or equal to 0.015 percent, O is less than or equal to 0.0040 percent, N is less than or equal to 0.0080 percent, H is less than or equal to 0.00035 percent, and the balance is Fe. The electroslag smelting casting system and the electroslag guide are controlled as follows: CaF2 is 60-80 percent, Al2O3 is 40-20 percent, or less MgO and CaO (the total is less than or equal to 20 percent); and the electroslag amount is usually 1.5-5 percent of the weight of a casting. The invention has less amount of oxide and sulfide, small size, even distribution, clean casting base body, high cooling speed, large crystallization temperature gradient at the front of solid and fluid, compact casting texture, high size precision and little distortion, and can greatly improve the product property of the refined casting.
Owner:SHENYANG RES INST OF FOUNDRY

Construction method of temperature decrease and crack prevention of mass concrete by utilizing thin-walled corrugated pipe circulating water system

The invention relates to a construction method of mass concrete temperature decrease and crack prevention by utilizing a thin-walled corrugated pipe circulating water system, which comprises the following steps: (1) selecting circulating water pipes: selecting thin-walled iron-sheet corrugated pipes as the pipeline materials for arranging circulating water pipes; (2) arranging a circulating waterpipe system: in the process of binding a reinforcing cage, installing and fixing the corrugated pipes to the reinforcing cage in a spiral or laminated way according to the structure form of a mass concrete, wherein, the distance between layers is from 500 mm to 2000 mm, the distance between rows in the layers is also from 500 mm to 2000 mm, and providing a water inlet pipe and a water outlet piperespectively connected with the corrugated pipes on the upper part of the mass concrete; (3) arranging temperature measuring points; (4) pouring the concrete; and (5) keeping maintenance. The construction method has the advantages of obvious effect on the temperature decrease and crack prevention of the mass concrete, low cost, simple operation, convenient and quick construction and convenience inthe connection of the corrugated pipes.
Owner:CHINA CONSTR FIFTH ENG DIV CORP LTD

A process for preparing active mixed materials by belt sintering of coal gangue

ActiveCN110078401BCementitious effectAffect frost resistanceCombustionResidual carbon
The invention discloses a process for preparing an activated mixed material through strand sintering of coal gangue. The process comprises the following steps: (1) crushing; (2) preparing materials, and uniformly mixing, namely sufficiently and uniformly mixing crushed coal gangue, quick lime, a carbon fuel and water in a cylinder mixing machine in a set ratio; (3) pelletizing, namely pelletizingthe uniformly mixed minerals into beads of a preset granularity; (4) sintering, namely performing allocation, ignition, air sucking sintering and cooling on the pelletized beads in a strand air sucking sintering machine; (5) crushing and finely grinding, namely crushing the sintered material, and finely grinding till a set specific surface area, thereby obtaining the activated mixed material. Theinvention provides the process for preparing an activated mixed material through strand sintering of coal gangue, by virtue of the properties that a combustion zone is high in temperature and short intime in the sintering process, a vitric phase can be formed, meanwhile, the sintered material mainly contains an oxidation atmosphere, harmful components such as organic matters, residual carbon andsulfur in the coal gangue can be removed at a high temperature, and the cementing property, the freezing resistance and the durability of cement are protected from adverse influence of the harmful components.
Owner:CENT SOUTH UNIV

Self-overlapping refrigeration system

The invention relates to a self-overlapping refrigeration system provided with at least one high-temperature self-overlapping loop (1) and at least one low-temperature self-overlapping loop (2), wherein the high-temperature self-overlapping loop (1) and the low-temperature self-overlapping loop (2) are respectively an independent and closed refrigeration circulation loop, and the high-temperatureself-overlapping loop carries out temperature-reduction fractional condensation for the second time to a gas refrigerant of the low-temperature self-overlapping loop after fractional condensation forthe first time by an intermediate heat exchanger. The invention enables the medium temperature of a refrigeration working medium to be lower, reduces the pressure of a low-temperature level system, obviously reduces the exhaust temperature and the exhaust pressure at the previous period of starting-up and temperature reduction, enhances the temperature-reduction speed simultaneously and enables alow-temperature level to obtain much larger refrigerating capacity. The invention enhances the effects of fractional condensation and separation by utilizing the evaporation of a working medium with high boiling point and a mixed regenerative cycle mode of a low-temperature flow-reversal working medium in the low-temperature level, and can ensure that components with high boiling points are more completely separated out.
Owner:QINGDAO HAIER BIOMEDICAL CO LTD

Method for preparing spherical metal powder under positive pressure cooling atmosphere environment

The invention relates to a method for preparing spherical metal, in particular to a method for preparing spherical metal powder under the positive pressure cooling atmosphere environment. The method comprises the following steps that (1) a plasma generator is prepared, and the plasma generator is placed above a cavity; (2) prepared to-be-nodulized powder raw materials are fed into the plasma generator, irregular to-be-nodulized powder raw materials heated by plasmas sent out from the plasma generator generate nodulizing under the effect of surface tension, and quick heat exchange with cooling gas and quick solidification after the to-be-nodulized powder raw materials enter the positive pressure environment are carried out; and (3) cooling air flow is fed into through a cooling air flow pipe, the to-be-nodulized powder raw materials are cooled and solidified under the effect of the cooling air flow to form spherical powder, and the cooled powder is collected through a container. The prepared metal powder is high in degree of sphericity, the interior is compact and fewer in defect, the mobility is good, and the method is suitable for short-period small-batch nodulizing production of multi-component alloy powder.
Owner:北京金航智造科技有限公司
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