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1069results about How to "Small temperature fluctuations" patented technology
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Fluorophor and method for production thereof and illuminator
ActiveUS20090091237A1Small temperature fluctuationsImprove efficiencyDischarge tube luminescnet screensLamp detailsPhosphorNitrogen
A fluorophor which comprises as a main component, an α type sialon crystal containing at least Li, A element (wherein A represents one or more elements selected from among Mn, Ce, Pr, Nd, Sm, Eu, Tb, Dy, Er, Tm and Yb), M element (wherein M represents one or more metal elements except Li and the A element), Si, Al, oxygen and nitrogen. The fluorophor has an a type sialon crystal structure which is represented by the general formulae: (Lix1, Ax2, Mx3)(Si12−(m+n)Alm+n)(OnN16−n) 1.2≦x1≦2.4 (1) 0.001≦x2≦0.4 (2) and 0≦x3≦1.0 (3), and has a luminescence peak at a wavelength in the range of 400 to 700 nm. The above phosphor is reduced in the lowering of brightness, and can be suitably used for a white LED and the like.
Owner:NAT INST FOR MATERIALS SCI
Heat pump type vehicle air conditioner having battery heat management function
ActiveCN106274372AGuaranteed to workImprove defrosting effectAir-treating devicesCorrosion preventionHeat managementVapor–liquid separator
The invention discloses a heat pump type vehicle air conditioner having a battery heat management function, which comprises a main refrigerant circulating loop configured to allow a refrigerant to flow in a sequence from a compressor, through a vehicle outside heat exchanger and an expansion valve, to a vehicle inside heat exchanger, or configured to allow the refrigerant to flow in a sequence from the compressor, through the vehicle inside the exchanger and the expansion valve, to the vehicle outside exchanger; and a defrosting loop configured to allow the refrigerant compressed by the compressor to sequentially flow through a defrosting throttle valve, the vehicle outside heat exchanger and a gas-liquid separator and then back into the compressor. The heat pump type vehicle air conditioner having the battery heat management function, provided by the invention, has a good defrosting effect with short defrosting time and low inside-vehicle temperature fluctuation, and can provide favorable comfort.
Owner:JILIN UNIV +1
Phase-change thermal energy storage three-in-one exterior wall outer insulation system and construction method thereof
InactiveCN101177967ALow costReduce heat transferCovering/liningsInsulation layerThermal energy storage
The invention relates to a triad phase change and energy storage external thermal insulating system of an external wall and the job practice of the system. A boundary layer, an insulation layer, a crack shielding layer and a finishing coat are arranged from a basal wall to outside in sequence. The insulation layer comprises three layers, including a bonding insulation layer which is an insulation mortar layer, a stable insulation layer which is an insulation board and an active insulation layer which is a phase change and energy storage insulation mortar layer, which are bonded with each other from interior to exterior; wherein, the fine aggregate in the phase change and energy storage insulation mortar layer uses inorganic porous particle as vector, organic phase changed material is adsorbed and stored in the pore space, and the outside surface comprises the phase change and energy storage porous medium of polymer-based composite material film. The crack shielding layer comprises a crack shielding mortar with strengthened mesh inside, meanwhile, a clip is vertically penetrated into the basal wall from the outside of the strengthened mesh. The invention adopts a triad insulation structure as the structure and phase changeable energy-storage material as fixing material, which significantly improves the insulation effect of wall and is favorable for keeping stable indoor temperature and substantially saving the energy consumption of indoor air conditioner.
Owner:北京中远汇丽精细化工有限公司
Frequency conversion control method for heat pump water heater
The invention relates to a frequency conversion control method for a heat pump water heater. The frequency conversion control method for the heat pump water heater is characterized by comprising the following steps of: performing frequency conversion control on a compressor of the heat pump water heater; performing frequency conversion control on a throttle mechanism of the heat pump water heater; performing frequency conversion control on a defrosting mechanism of the heat pump water heater; and performing frequency conversion control on an exhaust temperature of the heat pump water heater. The frequency conversion control method for the heat pump water heater has the advantages of high heating speed, few start-stop times, small temperature fluctuation of a water tank and energy conservation. At a high ambient temperature, the frequency of the compressor can be reduced and the circulating flow quantity of a system can be reduced, so that the suction pressure is reduced and the stable operation of the compressor is guaranteed. At a low ambient temperature, the circulating flow quantity of the system is increased by increasing the frequency of the compressor and the opening degree of an electronic expansion valve, the exhaust temperature is reduced and the compression ratio is reduced, so that the compressor can operate stably. In the defrosting process, the defrosting time is greatly shortened by increasing the circulating flow quantity of the system; and the frost can be removed completely, without the problem that the frost is accumulated into ice.
Owner:JIANGSU TENESUN ELECTRICAL APPLIANCE
High carbon high silicon martensite stainless steel billet and preparation method thereof
InactiveCN101967610AGuaranteed performanceSmall temperature fluctuationsProcess efficiency improvementElectric furnaceStress concentrationElectric arc furnace
The invention provides a high carbon high silicon martensite stainless steel billet. The steel billet is characterized by comprising the following components by weight percent: 0.41-0.47% of C, 2.80-3.20% of Si, 0.50-0.80% of Mn, 8.50-9.20% of Cr, 0.30% or less of Ni, 0.028% or less of P, 0.005% or less of S, 0.20% or less of W, 0.20% or less of Mo, 0.15% or less of V, 0.015% or less of Nb, 0.015% or less of Ti, 0.010% or less of Al and the balance Fe and inevitable impurities. The invention also provides a preparation method of the high carbon high silicon martensite stainless steel billet. The method comprises the following steps: performing primary smelting with an electric arc furnace (EAF), performing argon-oxygen decarburization (AOD) smelting, refining with a low frequency (LF) furnace, performing continuous casting, annealing and rolling. The method of the invention has simple operation, can stably control the quality of the continuous casting billet, completely suppresse cracks, overcome the defect of concentration of stress and increase the casting yield and quality stability of the martensite stainless steel.
Owner:BAOSTEEL SPECIAL STEEL CO LTD
Defrosting control method and device of air conditioner and air conditioner
ActiveCN104819542AImprove comfortRaise the room temperatureMechanical apparatusSpace heating and ventilation safety systemsEngineeringDefrosting
The invention discloses a defrosting control method of an air conditioner, comprising: monitoring if the air conditioner achieves a preset defrosting condition at present; increasing the present heating output of the air conditioner to raise the indoor temperature when the air conditioner achieves the present defrosting condition at present; monitoring if a difference value between the present indoor temperature and the set air conditioner temperature is higher than the preset temperature, and monitoring if the air conditioner continuously operates to reach the preset operation time; and performing the defrosting when the difference value between the present indoor temperature and the set air conditioner temperature is higher than the preset temperature and / or the air conditioner continuously operates to reach the preset operation time. The invention further discloses a defrosting control device of the air conditioner and the air conditioner. The method monitors the defrosting condition formation time of the air conditioner beforehand to reduce the indoor temperature fluctuation amplitude caused by the defrosting so as to improve the user comfort through raising the indoor temperature.
Owner:GD MIDEA AIR-CONDITIONING EQUIP CO LTD +1
Tunnel lining component high-temperature mechanical property testing system
ActiveCN101131342ALow failure rateFast heatingMaterial strength using tensile/compressive forcesUsing mechanical meansFailure rateData acquisition
The invention discloses a high-temperature mechanical properties testing system of tunnel lining structure, comprising fire thermal environment simulation subsystem; heat insulation subsystem; base and lining structure mechanical border simulation subsystem; loading subsystem, measurement subsystem; data acquisition subsystem; lining structure thermal border simulation subsystem. This tested system can better simulate characteristics of the tunnel fire (quick heating-up, high maximum temperature reached) and a variety of tunnel fire scenes; can simulate the thermal border condition of tunnel lining structure system and effect of surrounding soil, groundwater to components; can simulate the effect of formation resistance force to lining structure system; can impose a variety of loads- temperature conditions to lining structure system; can impose different displacement border conditions to lining structure system. The invention is safe, reliable, easy to use, with low failure rate, can meet the requirements of mechanical performance test of tunnel lining structure at high temperature (after high temperature).
Owner:TONGJI UNIV ARCHITECTURAL DESIGN INST GRP CO LTD
Refrigerator frequency conversion control method and application thereof
ActiveCN103776234AReduce start-up and shutdown lossesSmall temperature fluctuationsDomestic cooling apparatusLighting and heating apparatusEngineeringFrequency conversion
The invention discloses a refrigerator frequency conversion control method and an application thereof. The refrigerator frequency conversion control method and the application thereof are characterized in that when a refrigerator is powered on for the first time, a compressor of the refrigerator runs in the highest frequency, starting rate of first N starting and stopping cycles of the compressor is calculated after the compressor continuously runs for N+1 starting and stopping cycles, and running frequency of the next start of the compressor is determined according to presupposed target starting rate. The refrigerator frequency conversion control method and the application thereof can fully play the advantage that rotational speed of compressor is alterable, enable the refrigerator to achieve the purposes of noise reduction and energy conservation.
Owner:CHANGHONG MEILING CO LTD
Air conditioner control method and device
ActiveCN103486689ASolve the phenomenon of frequent start and stopSmall temperature fluctuationsSpace heating and ventilation safety systemsLighting and heating apparatusOperation modeRefrigeration
The invention discloses an air conditioner control method. The method includes the steps: when an air conditioner operates for a first preset time, controlling an electronic expansion valve to operate with opening B, and starting to detect indoor return air temperature T1 of the air conditioner in real time; according to an operation mode of the air conditioner, calculating a difference between the indoor return air temperature T1 detected in real time and target temperature Ts; in a refrigeration mode, enabling Delta T=T1-TS, and in a heating mode, enabling Delta T=Ts-T1; judging when the Delta T is within a range of [Tb, Ta], controlling the opening of the electronic expansion valve to be correspondingly regulated within a preset range value [B, C] according to changes of the indoor return air temperature detected in real time. The invention further discloses an air conditioner control device. By the method and device, the problem that a compressor of a fixed frequency air conditioner starts and stops frequently is solved, stepless regulation of refrigerating capacity or heating capacity is solved, and temperature fluctuation of a room with a variable frequency air conditioner is reduced.
Owner:GD MIDEA AIR-CONDITIONING EQUIP CO LTD
High-thermal-conductivity heat-storing nanometer-particle-mixed molten salt and preparation method thereof
InactiveCN103289653ASmall temperature fluctuationsImprove heat storage capacityHeat-exchange elementsHeat stabilitySolar power
The invention relates to the heat-storing field of solar thermal power generation, especially to a high-thermal-conductivity heat-storing nanometer-particle-mixed molten salt, and a preparation method thereof. The molten salt consists of a sold heat-storing molten salt, a dispersant and nanometer particles, wherein the dispersant and the nanometer particles disperse uniformly in the heat-storing molten salt and a eutectiform structure is formed, and the nanometer particles coat the surface of the heat-storing molten salt crystal particle. By adding the nanometer particles into the sold heat-storing molten salt, and by utilizing quantum size effect, surface effect, small size effect and the like possessed by the nanometer particles, the thermal physical property of the molten salt as a heat-storing medium has a substantial change. The preparation method is simple in technological process and low in cost, can help to substantially promote heat conductivity and specific heat capacity of the conventional heat-storing molten salt and substantially improve heat stability of the molten salt in a high temperature section, and can help to promote a heat storage capacity and system security of a concentrating solar power generation system and reduce costs of construction and operation of a power station.
Owner:NORTH CHINA ELECTRIC POWER UNIV (BAODING)
Rare-earth catalyst and conjugated diene polymerization process
The related rare earth catalyst for conjugated diene has high catalytic activity even on low temperature, and benefit to obtain the product with high conversion ratio and yield. This product is convenient to apply and can control the polyreaction even there is 30% butadiene in system.
Owner:CHINA PETROLEUM & CHEM CORP +1
Air-conditioner and control method thereof
ActiveCN102434915ASimple structureIncrease heating capacitySpace heating and ventilation safety systemsSpace heating and ventilation control systemsFour-way valveRoom temperature
The invention provides an air-conditioner and a control method of the air-conditioner. By means of the air-conditioner, heating capacity of low-temperature heating and outdoor frosting state of the air-conditioner can be improved and defrosting time can be shortened, therefore, indoor room temperature fluctuation can be decreased when the air-conditioner is defrosted, operating reliability of a compressor can be improved when the air-conditioner is defrosted, cost is reduced, and the conventional air-conditioner can be refitted. The invention has the technical scheme that: the air-conditioner is provided with a refrigerant circulating system, wherein the refrigerant circulating system comprises the compressor, a four-way valve, an outdoor heat exchanger, an indoor heat exchanger, a refrigerant pipeline and a refrigerant heater, and the refrigerant heater is arranged on a section of an E pipe of the four-way valve. The refrigerant heater in the invention is directly installed on the section of the E pipe of the four-way valve or a section of a refrigerant pipe between the four-way valve and a wind pipe stop valve, and components with mutually interferential control modes are reduced by the refrigerant heater. The system control is reliable, mutually interferential phenomenon is avoided, operating reliability of the whole air-conditioner is improved, the structure is simple and the cost is reduced.
Owner:HISENSE (SHANDONG) AIR CONDITIONING CO LTD
Control method of rotary drum type cut-tobacco drier three-level regulation
ActiveCN103082390AImprove product quality stabilitySmall temperature fluctuationsTobacco preparationThree levelAir volume
Owner:CHINA TOBACCO FUJIAN IND
Air capacity control method for refrigerating compartment of refrigerator and refrigerator
ActiveCN104677048AIdeal operating conditionsSmall temperature fluctuationsLighting and heating apparatusCooling fluid circulationEngineeringRefrigeration
The invention discloses an air capacity control method for a refrigerating compartment of a refrigerator and the refrigerator. The air capacity control method is characterized in that the refrigerator is energized for the first time; during the refrigeration of the refrigerating compartment controlled by a throttle, an electric throttle runs at a maximum angle, and a fan runs at the highest rotating speed; when an N-th refrigerating period of the refrigerator is finished, the first N-time startup ratio beta i is calculated; the angle of the electric throttle and the rotating speed working state of the fan during the next refrigeration of the compartment are determined according to the given startup ratio. The advantage of air capacity adjustability of the compartment of the refrigerator is fully utilized, so that the refrigerating quantity of the compartment of the refrigerator is effectively controlled, and the aims of uniformizing the internal temperature of the refrigerator and saving energy are achieved.
Owner:CHANGHONG MEILING CO LTD
Air conditioner load adjusting control method and device
ActiveCN107940693AAdjust fluctuations smoothlySmall temperature fluctuationsMechanical apparatusSpace heating and ventilation safety systemsEngineeringElectrical and Electronics engineering
The invention provides an air conditioner load adjusting control method and device. The method comprises the steps of counting historical operation parameters of an air conditioner unit, specifically,the operation parameters include the output load of a compressor; determining the predicted operation parameters of the air conditioner unit at the next period of time of the current moment, specifically, the predicted operation parameters include the predicated compressor output load and the predicted compressor fan frequency; obtaining the current operation parameters of the air conditioner unit; and controlling the start and stop or the operating state of the air conditioner unit according to the predicated operation parameters and the current operation parameters. According to the method,by predicting the air conditioner load in advance and adjusting the unit in advance, the unit load is adjusted stably, the temperature fluctuation of an air conditioner of a user is small, the effectof energy saving during operation of the whole unit is achieved, and thus the technical problems that an existing method causes large fluctuation during adjustment of the air conditioner load and delay exists during adjustment of the air conditioner load are solved.
Owner:GREE ELECTRIC APPLIANCES INC
Temperature control method and device thereof
ActiveCN106843312ASmall temperature fluctuationsHigh precisionTemperatue controlTemperature controlHeating time
The invention discloses a temperature control method and a device thereof. The temperature control method comprises the following steps: after acquiring the target-object temperature value measured in the Nth heating period and confirming that the target-object temperature value is bigger than and equal to the first preset temperature, determining the heating time of the Nth heating period and heating a target object according to the temperature value, the preset target temperature, the corresponding temperature rising speed or descending speed of the target object. As the heating time of the Nth heating period is determined according to the temperature value, the preset target temperature, the corresponding temperature rising speed or descending speed of the target object, the target-object temperature value in different heating periods is different so that the heating time of the target object in each heating period, the temperature control method and the device thereof can pointedly adjust the heating time in each heating period to keep the target-object temperature near the target temperature, and can effectively reduce temperature fluctuation and improve the accuracy of temperature control.
Owner:GREE ELECTRIC APPLIANCES INC
Gastrodia elata planting tank
InactiveCN107125036AIncrease humidityMaintain humiditySelf-acting watering devicesAgriculture gas emission reductionWater storageEngineering
The invention relates to a planting device, and relates to a gastrodia elata planting tank which comprises a tank body, wherein a planting cavity, a water taking cavity and water storage cavities are sequentially formed from inside to outside inside the tank body; a first piston which can slide is arranged inside the planting cavity; a first air pressure cavity is formed below the first piston; second pistons which can slide are arranged inside the water taking cavity; second air pressure cavities are formed below the second pistons; the first air pressure cavity is communicated with the second air pressure cavities; quantitative water tanks are arranged inside the second pistons; water inlets are formed in side walls contacting the second pistons, of the water storage cavity; water outlets are formed in one sides facing to the planting cavity, of the second pistons; first through holes are formed in side walls contacting the second pistons, of the water storage cavities; second through holes are formed in side walls contacting the second pistons, of the planting cavity; a planting tank is arranged on the first piston; a water leaking hole is formed in a side wall of the lower end of the first piston. Due to the quantitative tanks, a certain amount of water can be fed into a medium, so that the medium can be prevented from excessive humidity, and the humidity of the medium can be controlled within 60-80%.
Owner:贵州省德均农特产品开发有限公司
Control method of weed in tea garden
InactiveCN101379926ASmall temperature fluctuationsHinder photosynthesisFertilising methodsWeed killersAlligatorTea leaf
The invention discloses a method for controlling weeds in a tea garden, which comprises the following steps: first, plowing is carried out on the ground between tea plant rows in winter to remove root systems of the weeds such as nutgrass flatsedge, alligator alternanthera, greenbrier, chinaroot greenbrier, cogongrass, smartweed, lygodium and the like; a high-quality organic fertilizer is applied in spring: a certain amount of rape seed cake fertilizer is broadcast; the ground is covered with rice straws in spring: after the rape seed cake fertilizer is broadcast, all tea plant rows in the garden are immediately evenly covered with a certain amount of the rice straws; the high-quality organic fertilizer is applied in summer: a proper amount of the rape seed cake fertilizer is broadcast at a certain time; and the ground is covered with the rice straws in summer: after the rape seed cake fertilizer is broadcast, all tea plant rows are immediately evenly covered with a certain amount of the rice straws. The method enriches biodiversity of the tea garden, improves the ecological condition of the tea garden, increases tea yield, improves the quality of tea leaves; in addition, the method has the advantage of simple operation, is easy to be accepted by tea growers and has great popularization and application prospect.
Owner:HUNAN XIANGFENG TEA
Hydrocarbon continuous liquid phase hydrogenation process method and device
ActiveCN105647577AReduce volumeThe possibility of "flying temperature" is reducedTreatment with hydrotreatment processesChemical/physical processesHydrogenation reactionHydrogenation process
The invention discloses a hydrocarbon continuous liquid phase hydrogenation process method which includes a gas-liquid mixing step, to be more specific, a liquid phase material flow is fully mixed with hydrogen to obtain a dissolved-hydrogen-saturated liquid phase material flow by use of a gas-liquid mixer; and a hydrogenation reaction step, to be more specific, the dissolved-hydrogen-saturated liquid phase material flow flowing into a reactor flows in the direction of from the top of the reactor to the bottom of the reactor for liquid phase contact reaction with every stages of catalyst bed layers, and at the same time, new hydrogen is injected into the liquid phase material flow by a hydrogen distributor so as to realize the efficient hydrocarbon reaction of the liquid phase material flow. The present invention also discloses a hydrocarbon continuous liquid phase hydrogenation device which includes one gas-liquid mixer and one multiplestage reactor, the multiplestage reactor is connected with the gas-liquid mixer, each stage of the reactor comprises at least two stages of catalyst bed layers, and one hydrogen gas distributor is arranged between adjacent catalyst bed layers,.
Owner:PETROCHINA CO LTD
High-temperature mechanical property testing system of annular tunnel lining structure system
InactiveCN101131343AHigh simulationFast heatingMaterial strength using tensile/compressive forcesUsing mechanical meansFailure rateData acquisition
The invention discloses a high-temperature mechanical properties testing system of lining structure system of circular tunnel, which includes the following seven parts: fire thermal environment simulation subsystem; heat insulation subsystem; base and lining structure mechanical border simulation subsystem; loading subsystem, measurement subsystem; data acquisition subsystem; lining structure thermal border simulation subsystem. This tested system can better simulate characteristics of the tunnel fire (quick heating-up, high maximum temperature reached) and a variety of tunnel fire scenes; can simulate the thermal border condition of tunnel lining structure system and effect of surrounding soil, groundwater to components; can simulate the effect of formation resistance force to lining structure system; can impose a variety of loads- temperature conditions to lining structure system; can impose different displacement border conditions to lining structure system. The invention is safe, reliable, easy to use, with low failure rate, can meet the requirements of mechanical performance test of tunnel lining structure at high temperature (after high temperature).
Owner:TONGJI UNIV
Battery pack cooling control method, apparatus and battery pack thereof
ActiveCN108172930AAvoid lagSmall temperature fluctuationsSecondary cellsAnticipatory controlCooling power
The invention relates to a battery pack cooling control method, an apparatus and a battery pack thereof. The battery pack cooling control method comprises the following steps: obtaining the current temperature Tbat of a battery; determining a battery heat power Pb, a heat-exchange power Pc of the battery by environment, and a battery temperature-reduction power Pt, and calculating a battery cooling power P according to the battery heat power Pb, the heat-exchange power Pc of the battery by environment, and the battery temperature-reduction power Pt; determining a liquid coolant flow velocity Mc of the battery cooling power P; calculating the request inlet coolant temperature according to the battery cooling power P and the liquid coolant flow velocity Mc. The method takes regard of the influence of the current temperature on the battery, and takes regard of influence of the heat power of the battery and the heat-exchange power the battery by environment, feedback control and anticipatory control are combined, defect of cooling control lag can be prevented, temperature fluctuation of the battery pack can be reduced, temperature stabilization of the battery pack can be kept at a maximum degree, and real-time cooling control is realized.
Owner:智车优行科技(上海)有限公司
Control method for air-cooled refrigerator
ActiveCN106091566AImprove the preservation effectSmall temperature fluctuationsLighting and heating apparatusCooling fluid circulationEngineeringRefrigerated temperature
The invention provides a control method for an air-cooled refrigerator. The method comprises the following steps that S2, a compressor and a fan are operated simultaneously to refrigerate a refrigerating compartment, whether defrosting is started or not is judged, and if yes, the compressor is controlled to stop, and the fan is controlled to operate continuously to defrost an evaporator; S3, after defrosting is started, the temperature of the evaporator is sensed, after the temperature of the evaporator reaches the intermediate defrosting temperature, the temperature of the refrigerating compartment is sensed, if the temperature of the refrigerating compartment is higher than the shutdown temperature, the compressor is controlled to start to refrigerate the refrigerating compartment, and if the temperature of the refrigerating compartment reaches the shutdown temperature, the fan is controlled to continue operating to defrost the evaporator continuously; and S4, in the process that the fan continues operating to defrost the evaporator continuously, when the temperature of the evaporator increases from the intermediate defrosting temperature to the final defrosting temperature, the fan is controlled to stop, and defrosting is finished. Accordingly, the temperature in the refrigerating compartment is also taken into consideration in the defrosting process, the temperature in the refrigerating compartment fluctuates slightly, and the freshness retaining effect of the refrigerating compartment is improved.
Owner:HAIER SMART HOME CO LTD
Refrigerator
ActiveCN102980344AImprove energy efficiencyConstant cooling performanceLighting and heating apparatusDomestic refrigeratorsLow noiseTemperature control
The invention discloses a refrigerator, which comprises a refrigerator body, a refrigerator door, a refrigeration evaporator, a freezing air duct, an axial fan, a temperature control chamber air inlet duct, a temperature control chamber air inlet guide plate, a temperature control chamber air return duct and a freezing evaporator, wherein a refrigeration compartment, a freezing compartment and a temperature control chamber are formed in the refrigerator body; the refrigeration evaporator is arranged in the refrigerator body; the refrigerator air duct is arranged in the refrigerator body and is provided with a first air duct opening and a second air duct opening; the axial fan is arranged at the first air duct opening; the temperature control chamber air inlet duct is provided with a first air inlet duct opening and a second air inlet duct opening; the temperature control chamber air inlet guide plate is arranged at the second air inlet duct opening and is away from the axial fan in a predetermined distance; the temperature control chamber air return duct is provided with a first air return duct opening and a second air return duct opening; and the freezing evaporator is arranged between the first air duct opening and the second air duct opening. The refrigerator provided by the embodiment of the invention has the advantages of low cost and energy consumption, reliable refrigeration performance, high energy efficiency, low noise, constant temperature and high humidity in the refrigeration compartment, and the like.
Owner:HEFEI MIDEA REFRIGERATOR CO LTD
Fluorophor and method for production thereof and illuminator
ActiveUS20090085465A1Small temperature fluctuationsImprove efficiencyDischarge tube luminescnet screensElectroluminescent light sourcesNitrogenOptoelectronics
A fluorophor comprising, as a main component, an α-type sialon crystal which contains at least an A element (wherein A represents one or more elements selected from among Mn, Ce, Pr, Nd, Sm, Eu, Tb, Dy, Er, Tm and Yb), an M element (wherein M represents one or more elements selected from among Li, Na, Mg, Ca, Y, La, Gd and Lu), Si, Al, oxygen and nitrogen, and is represented by the general formulae: (Mx, Ay)(Si12−(m+n)Alm+n)(OnN16−n) (1) m=δM×x+δA×y (2) 0.2≦x≦2.4 (3) 0.001≦y≦0.4 (4) and 0.5×m<n≦4 (5). The fluorophor is reduced in the lowering of brightness, and is useful for a white color LED and the like.
Owner:NAT INST FOR MATERIALS SCI
Unitary air-conditioning unit of subway vehicle and control method thereof
ActiveCN101846413AImprove cooling efficiencyImprove comfortSpace heating and ventilation safety systemsSpace heating and ventilation control systemsClosed loopEngineering
The invention discloses a unitary air-conditioning unit of a subway vehicle and a control method thereof, which belong to the field of air-conditioning ventilation systems of subway vehicles. The unitary air-conditioning unit comprises at least two independent refrigeration loops, wherein each refrigeration loop comprises a compressor, a condenser communicated with one end of the compressor and an evaporator coiled pipe communicated with one end of the condenser; the evaporator coiled pipe is communicated with the other end of the compressor to form a closed loop; the evaporator coiled pipe is positioned in an evaporator; an air feeder is arranged on one side of the evaporator; and at least two parallel compressors are arranged in each independent refrigeration loop. The control method is realized by adjusting the starting and stopping number of the compressors in various independent refrigeration loops according to the detected refrigeration load capacity in the vehicle, so that the refrigeration loops for working are the most. The invention has the advantages of multistage adjustment of refrigerating capacity, full utilization of the heat exchange area of the condenser and the evaporator, high refrigeration efficiency, good energy-saving effect, high uniformity for air temperature in the vehicle, small temperature fluctuation and high comfort feeling for passengers.
Owner:ZHUZHOU ELECTRIC LOCOMOTIVE CO
Multiple on-line defrosting method and device of air conditioning system and air conditioner
InactiveCN104748464ASmall temperature fluctuationsFeel comfortableCorrosion preventionCompression machines with reversible cycleFour-way valveRoom temperature
The invention provides a multiple on-line defrosting method and a device of an air conditioning system and an air conditioner, wherein the method comprises the following steps: a four-way valve of the air conditioning system is controlled to convert from a heating mode to a defrosting (refrigeration) mode; an electronic expansion valve corresponding to a started inner unit is controlled to be closed; an electronic expansion valve corresponding to a closed inner unit is controlled to be opened; a refrigerant compressed by a compressor is transmitted to an outdoor side heat exchanger through the four-way valve, and is exchanged heat with surrounding outdoor air when being transmitted to the outdoor side heat exchanger so as to achieve the defrosting purpose; and the refrigerant after the heat exchange enters the closed inner unit through a filter, an outdoor electronic expansion valve, a liquid pipe valve and the started electronic expansion valve in sequence. The method can keep a certain surface temperature of the heat exchanger of the started inner unit, and can keep no drop of indoor temperature; and the air conditioning system can normally supply heat after the defrosting in 1-2 minutes, so that the fluctuation of room temperature is little, and human bodies feel more comfortable.
Owner:GREE ELECTRIC APPLIANCES INC
Defrosting system of air cooling refrigerator and defrosting control method thereof
InactiveCN103591751AIncrease profitSmall temperature fluctuationsLighting and heating apparatusDefrostingElectricityEngineering
The invention discloses a defrosting system of an air cooling refrigerator and a defrosting control method of the defrosting system of the air cooling refrigerator. The defrosting system of the air cooling refrigerator comprises an evaporator, electric heating tubes, a controller, an evaporator temperature sensor, a water pan and a freezing chamber temperature sensor, one or more electric heating tubes are fixed to a heat exchange tube of the evaporator and connected with the controller, the evaporator wall face temperature sensor is arranged on the surface of the heat exchange tube of the evaporator and connected with the controller, the freezing chamber temperature sensor is installed on the inner wall of an air cooling refrigerator freezing chamber and connected with the controller, and the water pan is arranged under the evaporator. According to the control method of the defrosting system of the air cooling refrigerator, the controller is adopted to detect the temperature of the wall face of the evaporator and the temperature of the freezing chamber, and the detected temperatures are combined with the accumulated running time of a compressor or the total running time of the compressor to judge whether defrosting should be performed or not; when the temperature of refrigerant in the heat exchange tube T>=T3 or the defrosting time t>=t2, the defrosting process is stopped; when defrosting water is discharged out of the refrigerator, the refrigerator is started again to enter the next refrigerating circulation. According to the defrosting system and the defrosting method, defrosting is uniform, the defrosting time is shortened, the electric heating defrosting efficiency is improved, and energy consumption of the refrigerator is reduced.
Owner:XI AN JIAOTONG UNIV
Air conditioner heating mode frequency control method
ActiveCN104515334ATimely responseEffective up/down frequencyRefrigeration safety arrangementRegulation temperatureOperating frequency
The invention provides an air conditioner heating mode frequency control method. When a compressor of the air conditioner is in a heating mode, the compressor working frequency is corrected through a PID algorithm, and if the compressor is stopped, the compressor stopping starting initial frequency is determined through the outdoor environment temperature. By the aid of the method, the determination of the initial frequency can respond to temperature changes timely, and accordingly, the frequency can be improved and reduced effectively; the air conditioner running is stable, the indoor environment temperature fluctuation is small, the frequent starting and stopping of the compressor can be prevented, and the user experience is good; the running of the air conditioner is not affected by outside weather changes, frequency parameters can be adjusted according to weather conditions and are optimized through a large number of experiments, accurate initial frequencies can be given in special days, the frequency is adjusted according to the environment temperature, and accordingly, the air conditioner stable running can be guaranteed, and the temperature can be adjusted rapidly.
Owner:HAIER GRP CORP +1
Cold-heat combined supply solar thermochemical adsorption composite energy storing device
InactiveCN101793447AImprove storage densityReduce volumeEnergy efficient heating/coolingClimate change adaptationCooling towerHigh energy
The invention discloses a cold-heat combined supply solar thermochemical adsorption composite energy storing device in the technical field of solar photo-thermal conversion utilization. A solar heat collector, a heat collector heat-transfer fluid adjusting valve, a high-temperature heat-transfer fluid circulating pump and a reactor heat exchange coil are circularly connected; a cooling tower, a cooling tower heat-transfer fluid adjusting valve, a low-temperature heat-transfer fluid circulating pump and a liquid accumulator heat exchange coil are circularly connected; a solid-gas chemical reactor, a refrigerant adjusting valve and a refrigerant accumulator are connected; the reactor heat exchange coil, a heat user side adjusting valve, a heat user side and the high-temperature heat-transfer fluid circulating pump are connected; the liquid accumulator heat exchange coil, a color user side adjusting valve, a color user side and the low-temperature heat-transfer fluid circulating pump are connected; the liquid accumulator heat exchange coil, the cooling tower, the cooling tower heat-transfer fluid adjusting valve and the low-temperature heat-transfer fluid circulating pump are circularly connected; and the refrigerant accumulator, the refrigerant adjusting valve and the solid-gas chemical reactor are connected. The device has high energy storage density and can realize cold-heat combined supply and simultaneous storage of heat and cold.
Owner:SHANGHAI JIAO TONG UNIV
Test system for extension of multi-axis and salt-spray corrosion fatigue crack
ActiveCN104931407AContinuous, stable and reliable supplyFacilitated DiffusionWeather/light/corrosion resistanceStrength propertiesFatigue loadingFracture mechanics
The invention relates to a test system for the extension of a multi-axis and salt-spray corrosion fatigue crack. The test system comprises a fatigue tester for providing I-type, II-type, III-type and compound fatigue loads required by a test for a test sample through a pull-cut-twist multi-axis loading fixture, and further comprises a salt-spray corrosion environmental box, wherein the salt-spray corrosion environmental box comprises a salt-spray corrosion box body and a salt-spray pre-occurrence box body which are mutually communicated through a pipeline; the salt-spray pre-occurrence box body conveys air and salt water required by salt-spray forming to the salt-spray corrosion box body; the salt-spray corrosion box body provides a required salt-spray corrosion environment for the fatigue crack extension test; both the pull-cut-twist multi-axis loading fixture and the fatigue crack extension test sample are positioned in the salt-spray corrosion box body. Through the adoption of the test system, the fatigue crack extension rate and other fracture mechanics parameters under the combined action of multi-axis loads and the salt-spray corrosion environment can be measured relatively well, and thus the material selection design and the service life evaluation for marine engineering equipment serving in the salt-spray corrosion environment and under a complex stress state can be supported.
Owner:HEFEI GENERAL MACHINERY RES INST +1
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