242 results about "Operative temperature" patented technology

The invention belongs to the technical field of pressure sensors, particularly relates to a high-temperature pressure sensor and a production method thereof and solves the problem that the existing pressure sensor fails to operate normally in environments of high temperature, moistness and the like due to the insufficiently reasonable design. The high-temperature pressure sensor comprises four layers. A planar square spiral inductor and a capacitor upper electrode are made on the first layer by pasting; a sealed pressure cavity is arranged on the second layer; a capacitor electrode is made on the fourth layer by pasting and is connected with an inner circular core of the top planar square spiral inductor. The production method includes filling the pressure cavity with carbon paste; subjecting the laminated structure to high-temperature sintering to volatilize carbon from air holes so as to form a complete cavity; and after sintering, placing glass beads at the air holes to allow for secondary sintering sealing. The high-temperature pressure sensor is capable of operating at normal temperature and high temperature more than 400 DEG C, and is simple in structure, small in size, simple in manufacture process and easy for industrial production.

The invention discloses a liquid metal electromagnetic pump which comprises a pump ditch, an electromagnetic drive unit, a control system and the like. The pump ditch of the electromagnetic pump vertically passes through the electromagnetic drive unit and can freely move out of the electromagnetic drive unit, thus bringing convenience for maintenance. Variable diameter shrinkage ports at the two ends of the pump ditch are welded with interfaces of peripheral equipment; a progressive wave magnetic field generated by a magnetic coil drives a high-temperature liquid metal medium to flow in the pump ditch, and the flow rate of the liquid metal is adjusted by changing the current intensity in the magnetic coil. An insulation layer between the magnetic coil and the pump ditch isolates the high-temperature radiation of the liquid metal, circulating cooling water is led into the hollow magnetic coil to reduce the temperature of the coil, and the comprehensive effect of the two causes the electromagnetic pump to be capable of working in the liquid metal environment with higher temperature. The liquid metal electromagnetic pump is applicable to the transmission and application of liquid metal with the characteristics of high working temperature, strong corrosiveness, easy oxidization, or large specific gravity and the like, and has the advantages of simple and convenient operation, high efficiency, long service life and the like.

The present invention provides an inherent security pool-shell combination low temperature nuclear heating device and an operation program thereof, which belongs to nuclear energy centralized heat-supply field. The invention mainly comprises the following procedures: adopting separated layout, forced circulation and high effective small temperature difference heat exchange in primary loop of reactor; under the precondition that parameter requirements of centralized heat-supply by big cities heat supply network satisfied, reducing work temperature of shell-type heating reactor as far as possible; meanwhile optimized layout of equipment, and organic combination of normal pressure pool in large volume (47) and shell-style heating reactor(29) remove accident possibility of water loss and coldness loss of reactor core (1). Complete inherent safety principle is carried out in the invention. Thus, absolute security of nuclear heating can be guaranteed by using mature pressurized water reactor technology, and enterprises have develop nuclear station pressurized water reactor experience can possibly jump over research and develop stage and enter into nuclear heating market directly, and make a real contribution for energy-saving and emission-reduction and improving country energy structure.

A ceramic dielectric composition suitable for preparing capacitors for use in high-temperature service conditions is disclosed. The ceramic material and capacitors made from it exhibit unique and heretofore unrealizable properties including low variation in capacitance with voltage up to high fields, low variation in capacitance with temperature over a broad temperature range, retained high permittivity at temperatures up to 200° C. and beyond, low loss, low field-induced strain and adequate capacitance to retain performance at very low service temperatures. The material is based on sodium bismuth titanate (NBT) with selected additions of substituents and dopants to broaden and flatten its dielectric response, lower loss, lower strain, lower voltage coefficient and increase resistivity.

The invention discloses a method for preparing squid surimi, which comprises the following steps of: skinning and eviscerating a squid carcass, washing the squid carcass, cutting the squid carcass into blocks, adding 0.05 to 0.08 weight percent protease enzymolysis solution insufficient for impregnating the squid blocks, and performing enzymolysis and tenderization by an impregnation method under the conditions of the pH value of the enzymolysis solution of 8.2 to 8.8, the operative temperature of 44 to 50 DEG C and the action time of 75 to 90 min; placing the tenderized squid blocks into an extruder for micronizing treatment under the conditions of the rotating speed of a threaded rod of 300 to 350 r/min, the feeding speed of 8 to 10 kg/min and the temperature of a machine barrel of 120 to 130 DEG C; and performing mincing, molding, heating, cooling, quick-freezing and cold storage. The method has the advantages of keeping perfectly the shapes of surimi products and not disintegrating the meat.

A semiconductor device that may include at least one temperature sensing circuit is disclosed. The temperature sensing circuits may be used to control various operating parameters to improve the operation of the semiconductor device over a wide temperature range. In this way, operating specifications of a semiconductor device at worst case temperatures may be met without compromising performance at other operating temperatures. The temperature sensing circuit may provide a plurality of temperature ranges for setting the operational parameters. Each temperature range can include a temperature range upper limit value and a temperature range lower limit value and adjacent temperature ranges may overlap. The temperature ranges may be set in accordance with a count value that can incrementally change in response to the at least one temperature sensing circuit.

A light source system that generates stable optical power over time and temperature in which a feedback control circuit is operative to receive a temperature signal and a sample signal and in response thereto generate a control signal to a driver circuit to maintain a power level of the light output substantially constant over an operative temperature range defined by T_min and T_max.

Relatively non-invasive devices and methods for heating or cooling a patient's body are disclosed. Devices and methods for treating ischemic conditions by inducing therapeutic hypothermia are disclosed. Devices and methods for inducing therapeutic hypothermia through esophageal cooling are disclosed. Devices and methods for operative temperature management are disclosed.

The invention aims at providing a beta-glucosidase mutant and application thereof. The amino acid sequence of the beta-glucosidase mutant is as shown in SEQ ID NO: 3, a nucleotide sequence of a coding gene is as shown in SEQ ID NO: 4, the optimum operative temperature is 50 DEG C and enzyme activity can be kept above 80% within 30-60 DEG C, and the mutant is stronger than a wild type in heat resistance; the optimum operative pH is 5.0 and the enzyme activity can be kept above 70% within 3.0-6.0, and the mutant is wider than the wild type in application scope under an acid condition; therefore, the beta-glucosidase mutant is conducive to the application in a cellulose raw material degrading process.

The invention discloses a heat-resisting polyethylene plastic pipe with high heat conductivity, which is characterized by being prepared from heat-resisting polyethylene resin with excellent corrosion resistance and heat resistance, a heat conducting material with high heat conductivity, and other auxiliaries through extrusion molding after the steps of melting and blending for modification. The heat-resisting polyethylene plastic pipe with high heat conductivity can be of single component and single layer, can also be of multiple components and multiple layers, and has the heat conduction coefficient more than two times higher than basic resin-heat resisting polyethylene; and when being used for conveying water as a medium, the heat-resisting polyethylene plastic pipe has the designed lifetime up to 50 years after continuously working at 70 DEG C, can work at the temperature up to 90 DEG C in a short period of six years and can work at the temperature up to 110 DEG C in a short period of one year. The heat-resisting polyethylene plastic pipe can be directly applied to a soil source heat pump, a seawater source heat pump system, a sewage source heat pump system and a radiation cooling and heating system to be used as a heat exchange pipe, is beneficial to improvement of system heat-transfer capability, can be welded and processed into heat exchangers with different forms and structures, and is used for chemical, food and medicine manufacturing processes with higher-temperature media.

The invention discloses a method for calculating a working temperature of a component IGBT of a photovoltaic inverter. Based on an energy conservation law, a mathematic relational formula of an external environment temperature, input power and IGBT loss and temperature rise is established through a loop iteration method by adopting a heat transfer principle and junction temperature and heat resistance principles; and calculation is performed by utilizing a loop iteration function in EXCEL to obtain shell temperatures and junction temperatures of the high-power component of the inverter under different environment temperatures and different input power. The errors between the predicted working temperatures of the IGBT under the different environment temperatures and the different input power, and the actually measured temperatures are within +/-8%; the method is used for predicting the working temperatures of the high-power component of the photovoltaic inverter under high and low-temperature environments and high and low-load ratios; and a theoretical basis is provided for assessing the reliability of the inverter.

The invention discloses a thermal infrared imager inhomogeneous correction coefficient generation and control method. The thermal infrared imager inhomogeneous correction coefficient generation and control method comprises that 1.infrared focal plane response data when infrared focal plane is respectively in high temperature and in low temperature are collected. 2. A gain factor G of a two point correction method is calculated through an upper computer and the gain factor G is downloaded into a parallel flash. 3. A startup loads gain factor G into a static random access memory (SRAM) from the flash. 4. A deviation ratio O is received through one time one point correction coefficient motion. 5. An offset compensation correction coefficient generation is controlled by analyzing a detector work temperature. 6. Steps are that two points plus one point inhomogeneous correction is proceed and correction results are output and the like. The thermal infrared imager inhomogeneous correction coefficient generation and control method removes calculation and storage process of the two-point method coefficient and reduces a half of the flash memory capacity. The load process and the download process of the inhomogeneous coefficient are shortened. The thermal infrared imager inhomogeneous correction coefficient generation and control method quicken a read-write speed of the flash by utilizing the flash design. The efficiency of the circuit is improved greatly.

Metal sheets and thin-wall metal tubes may be heated to a hot working temperature and transformed by a hot-blow-forming step to achieve shapes, difficult to attain, without excessive thinning or strain causing damage to the workpiece based on the inherent formability of the metal alloy. The stages of forming of the intended shape in the metal workpiece are analyzed and workpiece regions of potential damage during forming are identified. Then, during actual forming, these regions of the hot workpiece are selectively cooled with air (or other cooling fluid) to reduce thinning or strain in the critical region(s) and to redistribute this strain to adjacent lower strain areas of the workpiece. This hot-blow-forming practice is particularly useful in attaining complex shapes in workpieces of aluminum-based alloys and magnesium-based alloys.

The invention discloses a preparation method for a high-performance thermal barrier coating and specifically discloses a 4YSZ (4mol% Y2O3 stabilized ZrO2) thermal barrier coating and the preparation method of the 4YSZ thermal barrier coating. The 4YSZ powder which is of a fine nano-structure, uniform ingredients and a pure tetragonal phase structure is prepared utilizing a sol-spray pyrolysis synthetic process, and the 4YSZ powder is subjected to spray drying granulation, screening and atmospheric plasma spraying (APS) in sequence to prepare the coating. The high-performance thermal barrier coating prepared by the invention is of a pure tetragonal phase nano-structure with uniform ingredients, compared with a traditional YSZ casting, the high-performance thermal barrier coating has the advantages of being low in thermal diffusion coefficient, good in high temperature phase stability and thermal shock resistance, simple in preparation process and low in cost and the like; and the high-performance thermal barrier coating is more conducive to improving the efficiency and working temperature of a turbine engine, and the service life of the engine is prolonged.

The invention belongs to the field of bioengineering, and relates to engineering bacteria constructed by recombining low temperature alpha-amylase gene on an expression vector and converting to an expression host, recombinant enzyme expressed by utilizing the engineering bacteria and application thereof in industry. The invention adopts molecular operating technology, a strain of engineering bacteria EPGS230 is constructed by extracting and stipulating of bacterial genome, amplification of target genes, construction of the expression vector and conversion of recombinant vector, the engineering bacteria is processed by steps of culturing, inducing, centrifuging, ultrasound crushing, ion exchange, affinity chromatography and the like to obtain purified recombinant low temperature alpha-amylase. The inventive preparation technique has the advantages of simple operation, high enzyme activity, and low operative temperature.

The refrigerator with ice making machine in the cold storage chamber includes cold storage chamber in the upper part of the refrigerator; the freezing chamber in the upper part of the refrigerator; ice making chamber enclosed with heat isolating boards inside the cold storage chamber and with ice making machine and ice storage; the first evaporator inside the ice making chamber to lower the temperature inside the ice making chamber; and the second evaporator set inside the freezing chamber to provide cold air to both the freezing chamber and the cold storage chamber. The ice making chamber is inside the cold storage chamber, and has no influence on the normal temperature of the cold storage chamber. In addition, the separate control of evaporators in both the ice making chamber and the freezing chamber makes the refrigerator has high ice making capacity and low power consumption.

Relatively non-invasive devices and methods for heating or cooling a patient's body are disclosed. Devices and methods for treating ischemic conditions by inducing therapeutic hypothermia are disclosed. Devices and methods for inducing therapeutic hypothermia through esophageal cooling are disclosed. Devices and methods for operative temperature management are disclosed.

The invention relates to a temperature regulator for a heat exchange loop. The temperature regulator comprises a valve body and a thermal motive power element, wherein the cavity body is provided with a cavity, the thermal motive power element is arranged in the cavity in a matched way, the valve body also comprises two through holes which are respectively communicated with the cavity, the two through holes are respectively a first hole and a second hole, the first ends of the second hole and the first hole are respectively communicated with an inlet and an outlet of an external fluid cooling device, the second ends of the second hole and the first hole are respectively a fluid inlet and a fluid outlet, the inner diameter of the cavity is greater than the inner diameter of the second hole, in addition, the cavity is communicated with the second hole, one end, near the second hole, of the cavity is partially coincident with the second hole, the outer peripheral side of the thermal motive power element is sheathed with an elastic component, one end of the elastic component is tightly pressed, butted and connected onto the thermal motive power element, and the other end of the elastic component and the bottom of the cavity are tightly pressed, butted and connected with a shoulder part formed by the second hole. The temperature regulator for the heat exchange loop has the advantages that the work temperature of lubricating oil is controlled in an effective range, and the lubricating performance of the lubricating oil can be enabled to be maintained in the optimum state.

A microreactor includes a shell structure (2, 3), having a bottom wall (2) and a peripheral wall (3); a layer (5), accommodated in the shell structure (2, 3) and having cavities (9, 10) formed therein, the cavities being accessible form outside the shell structure (2, 3); reagents (17), arranged between the bottom wall (2) and the layer (5), at locations corresponding to the cavities (9, 10). The layer (5) is made of a meltable material that is solid at room temperature, has a melting point (T_MP) lower than a maximum operative temperature (T_MAX) required by reactions performable through the microreactor (1) and is not miscible with water. The melting point (T_MP) may be between 50° C. and 70° C. In one embodiment, the melting point (T_MP) is lower than a minimum operative temperature (T_MIN) required by reactions performable through the microreactor (1).