413results about How to "Avoid heat conduction" patented technology

Disclosed are a magnetic refrigeration device and a magnetic heating module thereof. The magnetic refrigeration device comprises a magnetic heating module and a magnet unit. The magnet unit reciprocates to act on different magnetic fields for the magnetic heating module. The magnetic heating module comprises a base, first magnetic heating material, second magnetic heating material and a heat insulation structure. The first and second magnetic heating materials are disposed in the base. The heat insulation structure is disposed between the first and second magnetic heating materials. Heat transfer fluid flows through the first and second magnetic heating materials so as to transfer heat between low temperature and high temperature ends of the magnetic heating module. The multiple different magnetic heating materials are disposed in the magnetic heating module, the heat insulation structure is disposed between the different magnetic heating materials, and accordingly heat transfer between the different magnetic heating materials can be avoided effectively and the magnetic heating module is widely applicable to various magnetic refrigeration devices.

The invention relates to a medium-voltage power transmission fire-resistant cable, which is characterized in that the outer fire-resistant layer of the medium-voltage cable core is made of fire-resistant inorganic fiber heat insulation layer on the inner side, and the outer side is a soft thermosetting elastomer for normal use. The composite fire-resistant and heat-insulating layer of the heat layer, the thermosetting elastomer, is composed of 30-50wt% silicon-based elastic material, 40-60wt% inorganic filler, 5-15wt% medium and low temperature frit, 4-10wt% vulcanizing agent, It is made by mixing extrusion molding and vulcanization. The composite fire-resistant and heat-insulating layer is a relatively soft sheath material when it is not exposed to flames, which can ensure good bending performance of the refractory structure in normal conditions, and quickly transforms into a shell-and-tube refractory and heat-insulating structure when it encounters fire or high temperature. In the fire-fighting environment, it can still maintain a certain period of time without being damaged, effectively preventing damage to the inner insulation caused by flames or high temperatures. When the flame temperature of the outer layer is 850°C, the temperature of the inner insulation surface is lower than 180°C. This fire-resistant and heat-insulating structure can be applied according to conventional cable production methods, and the production efficiency is extremely high.

A method is provided for forming a semiconductor thin film which is free from damage to the film with radiation of a pulse laser beam with the optimum energy value for perfect polycrystallization. For forming an amorphous silicon thin film, a surface of a plastic substrate as a base and insulating layers are each radiated with a pulse laser beam for removing volatile contaminants like a resist as a pretreatment. Damage to the film caused by a gas emitted from the base substrate and the insulating layers resulting from volatile contaminants is thus prevented. A protective layer including a gas barrier layer and a refractory buffer layer is formed on the substrate. Gas penetration from the substrate to the amorphous silicon film is thereby prevented. Conduction of heat produced by energy beam radiation to the substrate is prevented as well. It is possible to increase energy intensity of energy beam radiated for polycrystallization of the amorphous silicon film to the optimal value for perfect polycrystallization.

A backlight assembly includes a container, a plurality of lamps and a lamp-fixing member. The container includes a bottom face and side faces extending therefrom that define a receiving space. The lamps are arranged in parallel with each other in the container. The lamp-fixing member includes a support body installed in the container and arranged in a direction intersecting a lengthwise direction of extension of each of the lamps, a lamp-fixing portion protruding from the support body and covering a respective lamp, and a boss protruding from an inner face of the lamp-fixing portion and extending toward a center of the respective lamp to fix the respective lamp with a corresponding lamp-fixing portion via a point or line contact. Thus, a local decrease in temperature of the lamp covered by the lamp-fixing portion may be prevented to improve image display quality by preventing or eliminating dark spots.

A main shaft apparatus (10) of a built-in motor system, wherein a rotary shaft (12) is provided with: a first cylindrical component (71) made of metal material; and a second cylindrical component (72) made of carbon fibre composite material, which is positioned on the outer peripheral surface of the first cylindrical component (71) and into the outer peripheral surface of which a rotor (20) fits. By virtue of this, the temperature increase of the rotary shaft and a bearing due to the heat produced by the rotor can be controlled and processing precision can be improved.

The invention relates to a high temperature and high voltage experimental device for heating a gasket, pertaining to the technical field of high temperature and high voltage. The structure of the device is as follows: two anvil cells (8) in diamond or white gem material form a top-to-top anvil and holes are opened in the center of a gasket (1) to be used as a sample heating chamber (4), the anvilcells (8) are arranged in the chamber body of a pressing machine (7) to be pressed; the central part of the gasket (1) is made into a shape with the central width smaller than the width in two ends; the position of the gasket (1) opposite to the anvil face of the anvil cells (8) is padded with a mica sheet used as an insulating and thermal-preventing layer (2); the two ends of the gasket (1) are respectively welded with conducting wires (5) which are used for charging the gasket (1) with direct current to realize local heating of sample chamber area in high voltage equipment. The experimentaldevice has simple structure, good repeatability and low cost, and the construction of the system can be easily completed in a high voltage laboratory. Therefore, the invention is a high-temperature and high-voltage technology with good potential.

Ultrathin steel structure waterproof coating is characterized by being made from the following materials according to parts by weight: 5-20 parts of nano silicon dioxide aerosol, 15-45 parts of acrylic emulsion, 30-80 parts of melamine, 30-60 parts of pentaerythritol, 50-80 parts of ammonium polyphosphate, 10-15 parts of titanium dioxide, 5-15 parts of sepiolite fiber, 5-15 parts of talc, 5-15 parts of expansible graphite, 0.2-0.8 part of a waterborne wetting dispersant, 0.02-0.08 part of modified organic bentonite, and 0.05-0.2 part of a waterborne leveling agent. The preparation method comprises: weighing the components according to their ratio; adding the components sequentially into a high-speed dispersing machine for mixing and dispersing; standing and aging for 10-15 h; metering and packaging. The fireproof coating of the invention can reduce the increase in the steel structure loading to the coating and has no influence in the expanding and foaming process, expansion rate of a coating layer is high, heat isolating capacity of the fireproof coating can be improved greatly, and fire resistance of a steel structure can be improved greatly.

In a fixing apparatus including a regulating member which regulates the position of an external heating belt in a rotation axis direction, the external heating belt includes a base material made of polyimide having a tensile strength of 300 MPa or more and a thickness of 50 μm to 200 μm, and a releasing layer. In the base material, 5 to 25 parts by weight of graphite is dispersed in 100 parts by weight of polyimide. With this, it is possible to improve the durability of the external heating belt and adequately secure the life of the external heating belt.

The invention relates to an electric machine comprising a rotor and a stator as well as a method for cooling such a machine. In order to improve cooling of an electric machine, the inventive electric machine (18) comprises a rotor (2) that is excited by permanent magnets, a stator (38), magnets (3) which are arranged along the circumferential line of the rotor (2) in such a way that a magnetically non-effective zone (10) is created around the center of the rotor (2), at least one opening (11) in the magnetically non-effective zone (10) of the rotor (2) in order to embody an air flow path (41) through the rotor (2), said opening (11) extending substantially in an axial direction, and a fan (15, 56, 58, 59) which moves along with the rotor (2) and is used for embodying an air flow through the opening (11) of the rotor (2).

The present invention relates to a coating material with characteristics of efficiency, energy saving, heat shield, cooling and corrosion resistance, wherein the coating material is a three-layer composite material formed from a corrosion resistance bottom layer, a thermal insulation middle layer and a heat radiating surface layer, the corrosion resistance bottom layer is epoxy zinc-rich paint, the thermal insulation middle layer comprises a three-component coating material and a curing agent according to a weight ratio of 35-50:1, and the heat radiating surface layer is a composite surface layer adopting a polyurethane resin as a film forming substance. Compared with the coating material in the prior art, the coating material of the present invention integrates advantages of corrosion resistance, thermal barrier, heat reflection, and heat radiation.

A temperature sensing system and method for determining a patient's core body temperature by measuring the temperature of the patient's blood at a location in a vessel lumen retrograde of an insertion point of a temperature sensor or sensors into the vessel lumen.

A single-flow low-temperature spiral winding tube type heat exchanger with a vacuum heat-insulation effect mainly comprises a spiral winding tube bundle and a vacuum shell. A winding equation of a novel spiral tube bundle theory is applied, a mathematical model is built and applied to a numerical simulation process of a flow field, accordingly, a computation method of the tube bundle winding theory is obtained, and the spiral winding tube type heat exchanger is designed and manufactured. The vacuum heat-insulation technology is applied to the single-flow low-temperature spiral winding tube type heat exchanger, a vacuum structure consisting of an upper gland, a lower gland and a barrel which are independent from each other is adopted, and shortcomings that a traditional vacuum structure and a tube nest bundle are combined difficultly and inconvenient in manufacture, installation, detachment and maintenance and the like are overcome. The single-flow low-temperature spiral winding tube type heat exchanger is applicable to technical fields of gas purification and liquefaction separation including natural gas low-temperature liquefaction at the temperature of minus 161 DEG C, air low-temperature liquefaction separation at the temperature of minus 197 DEG C, low-temperature liquid-nitrogen washing at the temperature of minus 197 DEG C, low-temperature methanol washing at the temperature of minus 70 DEG C and the like, low-temperature heat exchange efficiency can be improved, and the single-flow low-temperature spiral winding tube type heat exchanger has the advantages that the single-flow low-temperature spiral winding tube type heat exchanger is compact in structure, heat transfer area of unit volume is large, heat expansion can be automatically compensated, the heat exchanger can be enlarged easily, the quantity of heat exchange equipment can be reduced, and the like.

A power control unit that controls a rotary electric machine that drives a vehicle, and that is mounted onto a motor case in which the rotary electric machine is housed, includes a fixed base that is made of resin; a cooler that is arranged on the fixed base and that includes a power module; and a control substrate that is arranged on the cooler. The fixed base inhibits conduction of heat from the motor case to the power control unit.

The invention is intended to obtain a rotating electric machine with a built-in control device in which the control device is kept from receiving heat from a main body of the rotating electric machine and the control device can be cooled in a desirable fashion. A heat sink 13 on which switching devices 12 of a control device 400 are mounted is attached to a rear bracket 6 by means of conductive studs 300 with a particular spacing provided in a left-to-right direction of figure 2. The heat sink 13 is cooled by a flow of cooling air induced by an unillustrated fan. Since the control device 400 is attached to the rear bracket 6 of which temperature increases with the spacing provided therefrom, it is possible to suppress heat transfer from the rear bracket 6 and effectively cool the control device 400 through the heat sink 13.

A self-punching bond-riveting connecting device comprises a compound female die, a compound edge pressing ring, heat conduction electrodes and a punch, wherein an annular groove is formed in the compound female die, the compound edge pressing ring is opposite to the compound female die in the vertical direction, the compound edge pressing ring can move in the vertical direction and is used for pressing to-be-riveted pieces, the heat conduction electrodes are arranged at the bottom of the compound edge pressing ring and the upper portion of the compound female die and can heat the different to-be-riveted pieces independently, and the punch is a solid circular structural piece, is arranged in a central hole of the compound edge pressing ring and can slide up and down in the axial direction of the central hole. The expanding performance of super-strength steel nearby riveting points is greatly improved, and the problems that super-strength steel is difficult to deform and effective connectors can not be formed are solved. The invention further provides a self-punching bond-riveting connecting method. By precisely controlling the punching speed of the punch, the requirements for the strength of the rivet, the punch riveting capacity of the device and the rigidity of a C-shaped frame of a riveting gun are lowered, and production cost is reduced.

There is provided a pyroelectric infrared sensor being capable of changing its shape and having high sensitivity. The sensor comprises the substrate 11 made of a polymer material such as polyimide or polyethylene terephthalate and having flexibility, the layer 13 comprising vinylidene fluoride (VDF), and the flexible electrodes 12 and 14 comprising an Al-deposited film and provided on and under the VDF oligomer layer 13. The pyroelectric infrared sensor of the present invention has flexibility as a whole due to flexibility of each component elements and can be formed into desired shapes. In addition, since a substrate made of a polymer material has heat capacity and heat conductivity lower than those of Si substrates used on conventional pyroelectric infrared sensors, sensitivity of the sensor can be increased.

PCT No. PCT/JP96/02451 Sec. 371 Date Aug. 6, 1998 Sec. 102(e) Date Aug. 6, 1998 PCT Filed Aug. 30, 1996 PCT Pub. No. WO97/29332 PCT Pub. Date Aug. 14, 1997A frost deposition detecting device is provided. This frost deposition detecting device comprises: a base member 1; a heat-conductive container 4 including a frosting portion provided to the base member 1; a thermally sensitive element 6' for detecting the temperature of the base member 1; a protection pipe 8 inserted into the base member 1 and disposed in the cavity formed inside the heat-conductive container; a heat insulator integrally formed with the protection pipe 8 to reduce heat conduction to the protection pipe 8; and another thermally sensitive element 6 secured in the protection pipe 8. With such frost deposition detecting device, highly accurate frost detecting performance and excellent durability in terms of water resistance and humidity resistance can be achieved.

A multi-layer heat isolator used as the low-temp heat-insulating surface layer of LNG ship or tank is prepared through plating zirconium oxide or zirconium oxide-aluminum oxide film on both surfaces of polyester or polyamide film by sol-gel method to form a reflecting screen, preparing the composite SiO2 aerogel-calcium silicate nanoparticles by sol-gel method, solvent replacing and surface modifying to obtain an isolating substance, and alternatively in-situ sticking to obtain a (3-50)-layer heat isolator (reflecting screen-isolating substance-reflecting screen-isolating substance).

A thermoelectric transducer comprising an emitter (1) for emitting electrons according to the action of heat or an electric field, a collector (2) disposed so as to face the emitter (1) and collect electrons emitted from the emitter (1), and an electron transport layer (3) held between the emitter (1) and the collector (2) to serve as a region for transferring the electrons emitted from the emitter (1), the electron transport layer (3) being a porous body having a mixed structure of a vapor phase and a solid phase, the entire solid phase which composes the porous body being composed of an insulating material, and the electrons emitted from the emitter traveling in the vapor phase by applying an electric potential to the collector (2) that is higher than that applied to the emitter (1).

A resonator element includes: at least one resonating arm extending, wherein the resonating arm has a mechanical resonance frequency which is higher than a thermal relaxation frequency thereof, the resonating arm has a groove portion, the groove portion includes a bottom portion, a first side surface that extends along the longitudinal direction of the resonating arm and comes into contact with the opened principal surface and the bottom portion, and a second side surface that faces the first side surface with the bottom portion disposed therebetween and comes into contact with the opened principal surface and the bottom portion, and the groove portion has a non-electrode region which extends from a part of the first side surface close to the bottom portion to a part of the second side surface close to the bottom portion and in which no electrode is provided.