51results about How to "Reduced temperature distribution" patented technology

The invention belongs to the field of the metallurgy technology and material science, and aims at providing a laser welding process method of brittle high silicon steel. Quick welding of strip tension rolling in the rolling preparation process of a high silicon steel thin strip is met. According to the mass ratio, an adopted alloy is prepared from 93%-96.5% of Fe and 3.5%-7% of Si; and the thickness ranges from 0.1 mm to 3.5 mm. According to the method, laser welding and a supplementary heat source are combined, and double-face or single-face welding is adopted; preheating carried out before welding is utilized for controlling the temperature rise speed, and heat preservation during welding and heat preservation carried out after welding are utilized for slow cooling to control the temperature reduction speed; and the temperature gradient and welding stress in the weld joint cooling process are reduced, and welding forming of the brittle high silicon steel is achieved. By means of the adoption of the method, cracks generated by the too high welding stress of the brittle high silicon steel can be avoided well, and the yield and the mechanical performance of the brittle high silicon steel are increased.

A high efficiency electrical outdoor barbecue device includes plural arc reflective boards that juxtapose and are spaced from each other to define a residue discharge gap, heating tube connection end protection boxes, heating tubes, shielding screens, and roasting gratings, which are sequentially deposited, from lower side to upper side, in a roasting basin that has a top opening to which a cover is pivotally connected. Opposite ends of the heating tubes are respectively positioned in and supported by the protection boxes, which are fit into and retained by positioning cavities defined in corresponding walls of the basin. The shielding screens are set above and thus protect the heating tubes from being stained by drippings of the roasted food. The arc reflective boards are set below the heating tubes to reflect the infrared light and heat generated by the heating tubes toward the roasting gratings for fully heating the roasted foods.

The mixture solvent of dichlorimethane type, the TAC and the plasticizer are supplied into a dissolution tank, and stirred therein with a stirrer to obtain a dispersing solution. The dispersing solution is fed into a storing tank and further stirred therein. Then the dispersing solution is fed by a pump to a heat exchanger for the heating, and thereafter the stirring is made with a static mixer. The temperatures of the dope is measured at many measuring points. On the basis of the temperature distribution, the heat transmission conditions of the heat exchanger are adjusted. Then the dope is fed to a heat exchanger for cooling, to cool to at most the normal boiling point of the dope. Then the mixing is made with a static mixer. Thus the obtained dope is uniform.

An exposure apparatus of the present invention includes a vacuum container accommodating a structure, a vacuum pump configured to increase the degree of vacuum achieved inside the vacuum container, a radiation unit configured to perform a heat exchange through radiation for the structure, a temperature detecting unit configured to detect the temperature of the structure, and a control unit configured to control the radiation unit based on the detected temperature, wherein the radiation unit is arranged at a position determined so that the radiation unit does not interfere with a heat exchange achieved through radiation between the vacuum pump and the structure.

In a method and an apparatus for thermal analysis, a target region is divided by dividing the geometry of the target object of the thermal analysis into a finite number of finite elements or cells. The thermal analysis on the target region is conducted using the results of the division. A temperature distribution on the target object is obtained from the heat transfer coefficients by a temperature distribution calculating unit. The actual temperatures at specific points are obtained based on temperature distribution obtained by the specific point temperature calculating unit. Differences between the actually obtained temperatures at the specific points and the predetermined target temperatures at the specific points are obtained by a difference calculating/determining unit. If the differences are determined to be out of the prescribed range, the heat transfer coefficients are changed by a heat transfer coefficient updating unit. These steps are repeated until the differences fall within the prescribed range so that temperature distribution on the target object is obtained. The method and apparatus for thermal analysis obtains temperature distribution universally, irrespective of geometries of the target object.

An exhaust heat recovery apparatus (functioning as a Stirling engine), which is installed in, for example, an exhaust passage of an internal combustion engine and an exhaust passage of factory exhaust heat as restraining reduction in exhaust heat recovery efficiency, is installed in a device installing surface formed in the heat medium passage so that the device installing surface and a heater connecting side end surface of a high temperature side cylinder become parallel and the device installing surface and a cooler connecting side end surface of a low temperature side cylinder become parallel. The high temperature side cylinder is arranged at an upstream side of a direction of exhaust flow. The low temperature side cylinder is arranged at a downstream side of the high temperature side cylinder.

The invention discloses an upper reflecting layer structure. The upper reflecting layer structure is composed of a plurality of graphite bricks, wherein a cavity and a plurality of channels are formedin each graphite brick, and the cavities are formed in the upper portions of the graphite bricks and used for allowing a coolant to circulate; and the plurality of channels are arranged at the lowerparts of the graphite bricks, the inlet of each channel communicates with the corresponding chamber, and the outlets of the channels are uniformly distributed on the lower end surfaces of the graphitebricks. The invention further discloses a reactor core structure adopting the upper reflecting layer structure and a high-temperature gas-cooled reactor. According to the invention, the upper reflecting layer structure can distribute the coolant, so the uniformity of the coolant entering a reactor core fuel area is improved.

The invention discloses a preparation method of a cathode heater assembly with high power and long service life. The preparation method comprises the following steps: using a rhenium tungsten wire toprepare a double-end double-screw cylinder heater prefabticated member; putting the double-end double-screw cylinder heater prefabticated member on a half-cylinder heater forming die to form a double-end double-screw cylinder heater; putting the double-end double-screw cylinder heater into a circular ring cavity die and uniformly arranging screw pitches to be bent into a circular heater prefabticated member; carrying out blackening, insulating layer coating and sintering treatment on the heater prefabticated member in sequence to form a required heater; enabling the space of a cathode and theheater to be filled with a ceramic filler; and then sintering to prepare the cathode heater assembly. By adopting the double-end double-screw ring structure, the problem, that the temperature distribution in the axial direction of the cathode is nonuniform caused by a cold side effect at two ends of the cathode, of a previous double-screw filament cathode is overcome, the temperature distributionon the surface of the cathode is uniform, and the operating point temperature of the cathode can be reduced; and according to the prepared cathode heater assembly, the starting time for cathode operation can be shortened by about one half, and the heating efficiency of the cathode is reduced.

A heating system 25 has a main heating element 3 generating heat be supplying an electric power supplied and having a heating surface 4a for heating an object, auxiliary heating elements 5A to 5D generating heat by supplying an electric power, and a main power source 1 for supplying the to the main heating element 3. The system 25 further has an auxiliary power source 2 supplying the power to the auxiliary heating elements 5A to 5D, and a power source controller 2 for controlling the power supplied to the main heating element and the power supplied to the auxiliary heating elements respectively and independently. The power supplied from the main power source 1 to the main heating element 3 is controlled by the controller 2 within a first power range. The power supplied from the auxiliary power source to the auxiliary heating elements is controlled by the controller 2 within a second power range. The second power range has a width smaller than that of the first power range so as to control temperature distribution on the heating surface 4a.

A hydrogen generating apparatus comprising combustion gas duct (5) for flow of combustion gas from a combustor; preheater evaporator (6) adapted to be fed with raw gas and water and to evaporate the water and heat the raw gas by heat transferred via partition walls from carbon monoxide cutdown unit (10) and the combustion gas duct; reformer (7) adapted to produce a reformate gas from the raw gas and steam fed from the preheater evaporator with the use of reforming catalyst (8) and heat transferred via partition wall from the combustion gas duct; carbon monoxide cutdown unit (10) adapted to remove any carbon monoxide contained in the reformate gas fed from the reformer with the use of carbon monoxide removing catalyst (9); and tubular body (3) having its both ends closed wherein, dividing the interior space thereof by partition walls (1),(2)(30),(47), the combustion gas duct, preheater evaporator, reformer and carbon monoxide cutdown unit are provided thereinside. Between the preheater evaporator and the carbon monoxide cutdown unit, there is provided heat transfer buffer part (11) composed of partition wall (30) defining the preheater evaporator and partition wall (47) defining the carbon monoxide cutdown unit, disposed opposite to each other with a spacing therebetween.

The invention discloses a super-junction stress Si/SiGe heterojunction bipolar transistor with a high thermostability. A SiGe virtual substrate structure is adopted by the transistor; and a Si<1-y>Ge<y> secondary collector region, a relaxation Si<1-y>Ge<y> collector region, a stress Si<1-x>Ge<x> base region and a stress Si emitter region are respectively and epitaxially grown on the SiGe virtual substrate structure. According to the transistor, by introducing a super-junction p-type layer parallel to the stress Si<1-x>Ge<x> base region to the relaxation Si<1-y>Ge<y> collector region, the purposes of improving the electric field distribution in a collector junction space-charge region, reducing the peak electronic temperature, inhibiting the impact ionization and improving a device breakdown voltage are achieved; and meanwhile, with the introduction of the super-junction p-type layer, the doping concentration and the phonon scattering rate of the relaxation Si<1-y>Ge<y> collector region are effectively reduced, and the thermal conductivity of the relaxation Si<1-y>Ge<y> collector region is improved; the transistor has the characteristics of large current gain and high breakdown voltage; the internal temperature distribution is significantly reduced, the characteristic frequency and the temperature sensibility are improved, and the high-thermostability work can be realized in a relatively wide working temperature range.

The present invention provides a method of effecting high temperature vacuum heating and cooling suitable for conducting heat treatment to be performed on components used in a display apparatus. The present invention's heating/cooling method comprises the steps of: heating a plate-like member placed in a reduced pressure atmosphere in a chamber by heating means opposed to the plate-like member; and cooling the plate-like member by a cooling plate which is opposed to the plate-like member, with the heating means therebetween, the cooling plate having a heat reflecting function. In one aspect of the present invention, the cooling plate is designed to have a emissivity of not less than 0.50 but not more than 0.80 so as to minimizes a sum of a requisite time for the heating step and a requisite time for the cooling step. In another aspect of the present invention, the plate-like member to be heated has two main surfaces differing from each in an in-plane distribution of emissivity and the heating means is opposed to one of the two main surfaces, which has a smaller distribution ratio, thereby realizing uniform and efficient heating/cooling.

It is provided a wavelength converting device oscillating an idler light having a wavelength of 5 to 10 μm from a pump light. The wavelength of the idler light is longer than that of the pump light. The wavelength converting device includes a wavelength converting layer 5 of a semiconductor non-linear optical crystal and having a thickness of 50 μm or smaller. The wavelength converting layer 5 includes a crystal orientation inversion structure wherein crystal orientation of the optical crystal is inverted at a predetermined period and at least one flat main face 5b. The device further includes a Peltier device 2 controlling a temperature of the wavelength converting layer 5; and a clad portion 4 joined with the flat main face 5b of the wavelength converting layer 5 and provided between the wavelength converting layer 5 and the Peltier device 2. The pump light, idler light and signal light satisfies a particular phase matching condition.

A neural network accelerator heat effect optimization method based on a memristor cross array comprises the following steps: 1, establishing a rapid temperature distribution calculation model: selecting pulse power of one point in an actual power matrix to divide the pulse power by the volume to obtain a pulse heat source value, inputting the pulse heat source value into ANSYS software to obtain a pulse temperature matrix, and carrying out convolution on the obtained pulse temperature matrix and the actual power matrix to be divided by the pulse power to obtain an actual temperature distribution matrix; 2, establishing an MLP neural network failure evaluation model: applying a distribution matrix of the actual temperature T obtained by the rapid temperature distribution calculation model to the MLP neural network failure evaluation model to obtain the influence of the actual temperature T on a weight value in the MLP neural network model; and 3, carrying out MLP neural network model mapping of off-line thermal optimization. According to the design, the arrangement of the memristor array is optimized, the influence of temperature rise on the memristors is reduced, and the precision of the offline training process of the neural network is improved.

There is provided a magnetic field generator 10 which is capable of generating a uniform magnetic field of a desired intensity easily and stably without increasing running cost. The magnetic field generator 10 includes a pair of plate yokes 12a, 12b. The plate yokes 12a, 12b have opposed surfaces provided with magnetic pole 14a, 14b respectively. The magnetic pole 14a includes a permanent magnet group 16a whereas the magnetic pole 14b includes a permanent magnet group 16b. Each of the permanent magnet groups 16a, 16b is formed substantially in a disc like shape, as an integral body made of a plurality of permanent magnets 20 and a plurality of heat conducting members 22. Tubular heaters 34, buried in the plate yokes 12a, 12b, generate heat, which is conducted via the plate yokes 12a, 12b to each permanent magnet 20 and each heat conducting member 22 which constitute the permanent magnet groups 16a, 16b.

The invention discloses a novel EGR corrugated pipe suitable for high temperature and provided with a composite layer flow guide pipe structure. The novel EGR corrugated pipe comprises a flange, a composite layer flow guide pipe, a multi-layer corrugated pipe and a straight pipe; one end of the composite layer flow guide pipe is connected with the flange, the straight pipe is located at the other end of the composite layer flow guide pipe, the multi-layer corrugated pipe is arranged on the periphery of the composite layer flow guide pipe, one end of the multi-layer corrugated pipe is connected with the flange, the other end of the multi-layer corrugated pipe is connected with one end of the straight pipe, and the other end of the composite layer flow guide pipe is located in the straight pipe. The novel EGR corrugated pipe can solve the problem that in the actual using process of an existing EGR corrugated pipe, the corrugation position or the root portion where a flange and a pipe are connected is prone to breakage.