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11113results about How to "Guaranteed service life" patented technology

Selective laser melting forming device and method of medical magnesium alloy metal part

ActiveCN101856724ASatisfies complex spatial shape requirements with high degrees of freedomMeet complex space shape requirementsSelective laser meltingOptoelectronics
The invention provides a selective laser melting forming device of a medical magnesium alloy metal part, which comprises a control device, a powder delivering and spreading device, a laser transmission mechanism, an air purification device and a closed forming chamber, wherein the powder delivering and spreading device comprises a hopper and powder spreading brushes arranged on two sides below the hopper, the upper part of the hopper is arranged in a way of corresponding to a feeding opening on the upper part of the forming chamber, and the lower parts of the powder spreading brushes horizontally correspond to the upper surface of a forming cylinder; the laser transmission mechanism is arranged outside and above the forming chamber and is arranged in a way of corresponding to the forming cylinder; the side wall of the forming chamber is provided with an air inlet and an air outlet, and the air purification device is connected with the air inlet and the air outlet respectively; and the control device is connected with the powder delivering and spreading device, the laser transmission mechanism, the forming cylinder and the air purification device respectively. The invention also provides a selective laser melting forming method of the medical magnesium alloy metal part. The device and the method can manufacture parts which have complex shapes required in the medical field directly, and have the advantages of high forming efficiency and the like.
Owner:SOUTH CHINA UNIV OF TECH

Vehicle air-conditioner system with battery heat management function

A vehicle air-conditioner system with a battery heat management function comprises a compressor, a condenser, a first expansion valve and an evaporator. The compressor, the condenser, the first expansion valve and the evaporator are connected in the first flowing direction of a refrigerant to form an air-conditioner refrigeration circulation loop. The vehicle air-conditioner system further comprises a plate heat exchanger, a second expansion valve, an air-water heat exchanger, a fan, a water pump, an electric heater and a battery pack built-in heat exchanger. The fan is arranged on the air inlet side of the air-water heat exchanger. The compressor, the condenser, the second expansion valve and the plate heat exchanger are connected in the second flowing direction of the refrigerant to form a battery cooling low-temperature medium circulation loop. The battery pack built-in heat exchanger, the water pump, the plate heat exchanger, the air-water heat exchanger and the electric heater are connected in the water circulation direction to form a battery temperature adjusting medium circulation loop. According to the vehicle air-conditioner system, uniform management of the temperature inside a vehicle and the temperature of a battery is achieved, a battery pack is in the better temperature environment all the time during working, and it is ensured that the good refrigeration effect is achieved inside the vehicle.
Owner:TIANJIN SANDEN AUTO AIR CONDITIONING

Control method and device of air-conditioning equipment and air conditioning system

The invention discloses a control method and a device of air-conditioning equipment and an air conditioning system. The control method comprises the following steps of: step S101, carrying out comparison on the water-outlet temperature of an evaporator and set object temperature, and determining the object load value of the compressor of the air-conditioning equipment; step S103, determining the variation of the load value of the air-conditioning equipment according to the object load value and the current load value of the compressor of the air-conditioning equipment; and step S105, adjusting the current load value of the compressor of the air-conditioning equipment according to the determined variation value. According to the invention, an object load is obtained through collecting the backwater temperature of an evaporator, the load of the compressor is adjusted according to the object load, and more accurate reference can be used for rationally adjusting a working mode of an air conditioner compressor; and the frequent adjustment of the compressor is avoided, the display of the system performance is more stable, and the service life of the compressor is guaranteed.
Owner:QINGDAO HAIER AIR CONDITIONING ELECTRONICS CO LTD +1

Preparation method of high-heat-conduction thermal-plasticizing inorganic substance composition and heat-dissipation part manufactured by method

ActiveCN102604219AImprove thermal conductivityLow injection molding processabilitySemiconductor devicesWork performanceElectron
The invention discloses a preparation method of a high-heat-conduction thermal-plasticizing inorganic substance composition and a heat-dissipation part manufactured by the method. The high-heat-conduction thermal-plasticizing inorganic substance composition is prepared by a component A, a component B and a component C, wherein the component A consists of 51wt%-88wt% of one or more inorganic substances with high heat conduction performance, the component B consists of 10wt% to 38wt% of one or more plastics with good processing properties, and the component C consists of 2wt% to 20wt% of a function additive. The preparation method comprises the following steps that: firstly, the configured component A and the configured component B are dried; secondly, the dried components A, B and C are mixed or internally mixed and then are preprocessed to manufacture raw materials; the manufactured raw materials are fed into an extruder, and fibrous heat-conduction inorganic substances are added from a side feeding part to perform modified processing and then are extruded into strips through a multiple-hole die; and fourthly, the materials extruded into strips are subjected to die-surface sized dicing or brace cooling sized dicing, thereby manufacturing the high-heat-conduction thermal-plasticizing inorganic substance composition. According to the invention, the normal service life and work performance of a chip of an electronic product are ensured, and the production cost is reduced.
Owner:东莞市兆科电子材料科技有限公司

Active and reactive coordination optimization control method of distributed photovoltaic power distribution network

The invention provides an active and reactive coordination optimization control method of a distributed photovoltaic power distribution network. The method comprises steps that S1, based on the model predictive control method, according to the control targets and the control variables of different time scales, the distribution network system control process is divided into the long time scale optimization control and the short time scale optimization control, and a long time scale optimization control model and a short time scale optimization control model are established; S2, solving problems of the long time scale optimization control and the short time scale optimization control are converted into second-order cone programming problems; and S3, the long time scale optimization control model is based on the photovoltaic output and the load demand forecasting information, and uses the multi-step rolling optimization to solve the active and reactive power output of each controllable device, and the short time scale optimization control model is used to calculate the active and reactive power increment of each controllable device in a rolling manner with the solving result of the long time scale optimization control model as the reference value.
Owner:CHINA AGRI UNIV

Charging control method for low-voltage storage battery of electric vehicle and electric vehicle

The invention discloses a charging control method for a low-voltage storage battery of an electric vehicle. The electric vehicle comprises a high-voltage power supply, the low-voltage storage battery and a power supply converter. The power supply converter is connected with the high-voltage power supply and the low-voltage storage battery. The charging control method comprises the following steps that current operating modes of the electric vehicle are detected by a whole vehicle controller of the electric vehicle, wherein the operating modes comprise the driving mode and the parking mode; if the electric vehicle is in the parking mode, the whole vehicle controller obtains electric quantity information of the low-voltage storage battery at preset time intervals after the high-voltage power supply stops high voltage output; and when the electric quantity of the low-voltage storage battery is lower than a charging threshold value lower limit, the whole vehicle controller controls start-up of the power supply converter to convert high voltage electricity into low voltage electricity in order to charge the low-voltage storage battery. The charging control method for the low-voltage storage battery can lower a power-lack risk which occurs in the low-voltage storage battery when the electric vehicle is in the parking mode. The invention further discloses the electric vehicle.
Owner:BEIJING ELECTRIC VEHICLE

Power transmission and distribution line partial discharge fault on-line detection method and apparatus thereof

The invention provides a power transmission and distribution line partial discharge fault on-line detection method and an apparatus thereof, belonging to the measurement field. A method of on-line remote orientation focusing pick-up / positioning is employed to capture a supersonic wave signal generated in a discharge process, a heterodyne method is used to convert the picked supersonic wave signal into a sound / electrical signal which can be distinguished by detection personnel, according to a value size or change of sound pressure / voltage, whether a position where a partial discharge fault easily happens exists a contaminant flashover phenomenon or not and a degree of contaminant flashover are determined qualitatively and quantificationally, thereby, intensity of contaminant flashover of the position where the partial discharge fault easily happens and a size of threat to a system are determined, manpower and regular inspection cost can be greatly reduced, previous power failure time workload is reduced, safety operation of electric power equipment is ensured, maintenance cost is saved, and power supply reliability is raised. The method and the apparatus can be widely used in the on-line detection and fault diagnosis of a power transmission and distribution line.
Owner:SHANGHAI MUNICIPAL ELECTRIC POWER CO +1

Hydrogen production catalyst

The invention provides a cerium-based composite oxide loaded noble metal catalyst for catalyzing alcohols and hydrocarbons to carry out hydrogen production by reforming, comprising two parts including noble metal and a carrier. The noble metal is one or combination of more than two of rhodium, platinum, palladium, iridium, ruthenium and gold; and the carrier is a cerium-based composite oxide carrier which takes a cerium-lanthanum solid solution as a representative. The catalyst can be applied in the form of a grain state or a powder state and also can be coated on a porous integral ceramic to be used as a monolithic catalyst. The invention further provides a manufacturing method of the catalyst, which comprises the following steps of preparing a cerium-based composite oxide and loading the noble metal. Some preferable implementation schemes of the catalyst utilize biological ethanol as a raw material and the prepared hydrogen can be considered to a renewable energy source; and the catalyst can be applied to the condition of a high space velocity.
Owner:RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI

Integrated water-cooled power battery box

The invention relates to the technical field of electric cars, in particular to an integrated water-cooled power battery box. The integrated water-cooled power battery box provided by the invention comprises a box cover, a box body and a temperature regulating power system, wherein the box body is made of an aluminum alloy material and is manufactured by an extrusion moulding technology; a circulating flow passage is formed in the wall of the box body; a circulating loop for a temperature regulating medium to flow circularly is arranged inside the wall of the box body; and the temperature regulating power system can drive the temperature regulating medium to circularly flow in the circulating loop. In such a way, a water cooling board and a battery box are designed in an integrated manner,a hollow aluminum alloy section is adopted to achieve lightweight design, mechanical properties such as strength and rigidity are met, the integrated water-cooled power battery box is simpler in structure, better in technical performance and smaller in occupied space, and the comprehensive cost can be reduced; the heat-dissipating, cooling and temperature-raising and heating functions can be achieved by using one set of temperature regulating power system, the integrated water-cooled power battery box is simpler in structure, more convenient and fast to use and smaller in occupied space, themanufacturing cost and the using cost can be reduced, and the heat-dissipating efficiency and the heating efficiency can be improved.
Owner:BEIJING PRIDE NEW ENERGY BATTERY
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