2076 results about "Heat transfer efficiency" patented technology

A vapor chamber structure includes a casing, a working fluid, and an improved wick layer. The casing has an airtight vacuum chamber. The working fluid is filled into the airtight vacuum chamber. The wick layer is formed on a surface of the airtight vacuum chamber. Therefore, the present invention can increase the backflow velocity of the working fluid and improve the boiling of the working fluid due to the match of the improved wick structure. Because the backflow velocity and boiling of the working fluid is increased, the heat-transmitting efficiency is increased.

A support structure for a compact planar cooling device is presented. The support structure allows the cooling device to be made with a simpler structure than most conventional cooling devices. The cooling device includes a planar casing, a wick layer, and the support structure. The support structure includes a flat plate with a portion cut out to form an opening and a spacer on the flat plate. The spacer is made by bending or folding the cut-out portion of the plate. The spacer enhances coolant circulation inside the cooling device by pushing the wick layer against the inner surface of the casing and maintaining a set distance between the support structure and the casing to allow unimpeded coolant movement. The cooling device can be made cost-effectively without compromising heat transfer efficiency.

A plate heat exchanger includes a plurality of plates sandwiched between a pair of end plates. Each of the plurality of plates has two passageways defined therein that are not in fluid communication with each other. Alternatively, some of the plurality of plates have a passageway, while some of the remaining plates have another passageway. Two fluids flow through the two passageways in a countercurrent fashion. Because the countercurrent flows are superior in heat transfer efficiency, it is possible to enhance the performance and reduce the size of the plate heat exchangers.

The invention belongs to the technical field of preparation of phase change materials and microcapsules, and specifically relates to a method for preparing a hollow polymer microsphere coated with a phase change material. The method comprises the following steps of: performing surface modification on hydrophilic inorganic nanoparticles by an ionic surfactant, and adding the phase change material and monomers to the modified inorganic nanoparticles, which are taken as a stabilizer, to prepare the hollow polymer microsphere coated with the phase change material through a Pickering suspension polymerization method. The preparation process is simple, the raw materials are cheap and easily available, the inner wall of the prepared hollow polymer microsphere is made from polymers, the outer layer of the prepared hollow polymer microsphere is made from the inorganic nanoparticles, and the organic phase change material is coated inside the prepared hollow polymer microsphere. The prepared microsphere has a small size, the coating rate of the phase change material is high, and the outer inorganic nanoparticle layer enhances thermal stability, heat transfer efficiency, sealing performance and mechanical properties of the microsphere.

The invention discloses an electric cooking appliance. The electric cooking appliance comprises a pot body, a heating device and a temperature controller, wherein the pot body is provided with an inner pot cavity, and the inner pot cavity is internally provided with an inner pot; the heating device is arranged in the pot body and used for heating the inner pot; the temperature controller is arranged in the pot body and magnetically attracted on the outer wall face of the inner pot. According to the technical scheme, the temperature controller is magnetically attracted on the outer wall face ofthe inner pot, and more tightly fits the outer wall face of the inner pot under the action of magnetic field force, the fit gap between the temperature controller and the inner pot is smaller, and the heat transfer efficiency between the inner pot and the temperature controller is improved, so that the temperature at a temperature sensor is closer to the actual temperature of the inner pot, thereby reducing the error of the detection temperature of the temperature sensor, and being beneficial to the precise control over the temperature of the inner pot.

The invention provides an environment-friendly method for prolonging the service life of a face milling cutter based on heat pipe phase changes, so durability of the face milling cutter can be remarkably improved under a milling especial for high-speed milling machining condition. The method comprises a novel face milling cutter. The novel face milling cutter comprises a heat pipe, a face milling cutter shank, a face milling cutter body and a face milling head. The face milling head is arranged at one end of the face milling cutter body, the face milling cutter shank is arranged at the other end of the face milling cutter body, the heat pipe is implanted into the face milling cutter body from the face milling cutter shank in the direction parallel with the axis of the face milling cutter body and is close to the main cutting edge part on the face milling head, and the heat pipe is filled with a liquid absorption core. Heat pipe phase change heat transferring is adopted in the method, so the heat pipe is higher than cutting fluid in heat transfer efficiency. A heat pipe technology is adopted, the cutting temperature of the face milling cutter is lowered, the heat pipe is more environment-friendly than the cutting fluid, and personal injuries to operation staff do not exist. In addition, the heat pipe adopted in the method is cheaper than the cutting fluid in market price, and therefore manufacturing cost of products of enterprises can be reduced.

An ethylene cracking furnace comprises a radiation segment, a convection segment, a bottom burner, sidewall burners and a quench boiler; the radiation segment is provided with a radiation room; radiation furnace tubes used for the pyrolysis of hydrocarbons and petroleum distillate are arranged inside the radiation room; each radiation furnace tube is composed of an inlet tube and an outlet tube; each inlet tube and each outlet tube are respectively provided with one channel; at least a radiation room 3 is arranged in the radiation segment of the cracking furnace; the radiation furnace tubes are arranged in two rows in the radiation room; each row of radiation furnace tubes forms a tube row plane; an inlet tube 6 and an outlet tube 7 of a radiation furnace tube are in two different tube row planes in an alternating interval way; the bottom parts of the inlet tube 6 and the outlet tube 7 are connected together through a symmetrical U-connector 8. The invention achieves a large-scale cracking furnace; the furnace tube arrangement way of the invention improves the radiation heat transfer efficiency of the radiation furnace tubes so as to prolong the operating cycle of the cracking furnace and reduce energy consumption of products.

A capillary structure for a heat transfer device, such as a heat pipe is provided having a plurality of particles joined together by a brazing compound such that fillets of the brazing compound are formed between adjacent ones of the plurality of particles and one or more vapor vents are defined in the capillary structer. In this way, a network of capillary passageways are formed between the particles and vapor-vents through the capillary structure so as to aid in the transfer of working fluid by capillary action, while the plurality of fillets provide enhanced thermal transfer properties between the plurality of particles so as to greatly improve over all heat transfer efficiency of the device. A method of making the capillary structure according to the invention is also presented.

Disclosed is a heat exchanger configured by laminating layers having micro-channels by adapting a micromachining, wherein the micro-channels having uniform length and cross section are constructed within a heat exchanger body in a curved outer shape, thereby minimizing deviation for each channel and improving heat transfer efficiency.

Provided is a water cooling type cooling jacket for an electronic device including a pouch body formed of a soft, loose elastic material that is deformable to closely contact heat-generating elements having various shapes due to a contact pressure and accommodating and a coolant, and a coolant inlet tube and a coolant outlet tube formed at one side of the pouch body to allow the coolant to circulate inside the pouch body and connected to coolant circulation lines for circulating the coolant. Therefore, the water cooling type jacket for an electronic device can be adapted to various shapes of heat-generating elements having uneven surfaces and various shapes of installation spaces beyond electrical and mechanical limitation to increase a heat transfer area and maximize a heat transfer efficiency and can be installed at various electronic devices such as hard disk drives, video cards or memory cards and a PCB without spatial limitation. Also, the water cooling type, soft cooling jacket for an electronic device can reduce a fabrication cost by simplifying the structure while maintaining close adhesion and can safely protect various elements by distributing pressure applied to the elements.

The far infrared vegetable dewatering apparatus includes drying cabinet, transmission mechanical,, conveying mechanism and heater. The drying cabinet has material feeding port and induced draft port in the top and discharge port and air intake in the bottom. The present invention features that the drying cabinet is separated with partition boards into several layers with separated conveying mechanism, transmission mechanism, heating unit and guide board. The present invention has small size, convenient operation, fast drying speed, high heat efficiency and low power consumption, and the dried vegetable product has bright color and high quality.

The present invention provides a heat exchanger, which is improved in terms of heat transfer efficiency and space saving, which can be manufactured with simplified steps and at a reduced cost, and which ensures improved reliability when used, a method for manufacturing the heat exchanger, and an air conditioner including the heat exchanger. The heat exchanger includes: a plurality of plate fins, made of an aluminum alloy, subjected to a hydrophilic film forming treatment, and stacked at predetermined intervals to allow air to flow therebetween; and a flat heat transmission tube, made of an aluminum alloy and provided with a plurality of refrigerant flow paths arranged in a major axis direction of the tube so as to extend in a longitudinal direction of the tube; wherein the heat transmission tube is fitted into grooves provided in the plate fins, and a solder layer provided on an outer surface of the heat transmission tube at a front edge thereof is melted such that the heat transmission tube is fixedly secured to the plate fins by the solder.

A heat exchanger for exchanging heat between a first fluid and a second fluid is disclosed; wherein the heat exchanger has improved thermal efficiency and low fluid back pressure. The heat exchanger comprises conduits for conveying the first fluid, wherein the conduits include a plurality of flow passages. The flow passages are defined by a plurality of fins that are continuous along the direction of flow of the first fluid. Each fin includes a wave-shaped region, and adjacent fins sub-divide each flow passage into first and second sections that are interposed by a third section. The wave-shape of the fins creates a continuously varying cross-sectional area for each third section. The variation of the cross-sectional area of the third section, coupled with the wave-shape of the fins, induces a swirl flow between the third section and each of the first and second sections. This swirl flow improves the efficiency of the overall convection heat transfer in each conduit. Further, the overall cross-sectional area of each conduit remains constant even as the cross-sectional areas of individual flow passages changes, which mitigates the development of back pressure in the flow of the first fluid.

The invention discloses a thermal interface material and a semiconductor packaging structure. The semiconductor packaging structure comprises a substrate, a chip and a heat dissipation plate. The chip is arranged on the substrate, and the heat dissipation plate is arranged on the chip. The thermal interface material is contained between the chip and the heat dissipation plate; the thermal interface material comprises a grapheme layer and two low-melting-point metal layers; the two low-melting-point metal layers are covered on the grapheme layer from top to bottom. According to the thermal interface material and the semiconductor packaging structure, the flat heat-transfer efficiency between the chip and the heat dissipation plate can be improved through the grapheme material with high thermal conductivity; and the cost is lower than that of the thermal interface material using pure indium.

A reaction vessel which includes internally placed temperature controlling mixing baffles in which liquid is boiled, resulting in an isothermal heat sink. The energy of vaporization is supplied by the reaction vessel contents. The vapor produced by the boiling is directed to channel coils which surround the outside of the reaction vessel wall. The channel coils contact the outside wall of the reaction vessel perpendicularly, and provide mechanical support for the reaction vessel. The mechanical support from the channel coils allows for a decrease in the thickness of the reaction vessel wall and corresponding increased heat transfer efficiency between the channel coil contents and the reaction vessel contents. The entire above described apparatus is enclosed within an evacuated shell to provide additional insulation. The apparatus includes a gravitationally powered device that ensures that saturated or sub-cooled liquid enters the isothermal mixing baffles, thus guaranteeing that isothermal phase change will occur therein.

The invention discloses semiconductor material growing equipment, and in particular relates to a Czochralski crystal growing furnace for semiconductor single crystal growth. In the invention, the downward motion of a heat shield is used to replace the upward motion of a crucible, so that the crucible can only rotate and not ascend any more, thus, one degree of freedom is reduced and the system complexity is decreased; by adopting dual heaters respectively located at the bottom and the side face of the crucible respectively to control the growth of a crystal by aiming at different stages respectively, the temperature gradient control of the crystal and melt is more convenient; the relative positions between the crucible and the heaters are kept parallel and unchanged, and the heat radiation of the heaters is directly used for baking the crucible, so that the heat transfer efficiency is greatly improved in comparison with that in a traditional method in which the crucible in the traditional single crystal furnace is constantly away from a heating zone; and a flow guiding cylinder is used for guiding argon gas to carry out enhanced heat exchange on the crystal, so that an convection vortex of the argon gas above the melt is inhibited, thus, impurities and micro-defects in the crystal are favorably reduced and the consumption level of the argon gas is decreased.

The invention discloses a heat pipe and a manufacturing method of the heat pipe. The heat pipe and the manufacturing method of the heat pipe can achieve cooling of electronic devices and a device. According to the heat pipe, a pipe shell is arranged on the outermost portion, a steam chamber is formed in the innermost portion, the steam chamber is divided into an evaporation segment, a thermal insulation segment and a condensation segment in the axial direction of the steam chamber, the thermal insulation segment is arranged in the middle, the evaporation segment and the condensation segment are arranged at the two ends respectively, a cylindrical capillary liquid absorption core layer formed by a multi-hole foamy copper liquid absorption core is closely attached to the inner wall of the pipe shell, holes in the multi-hole foamy copper liquid absorption core are different in hole diameter, a silk screen supporting frame is closely attached to the inner wall of the capillary liquid absorption core layer, the steam chamber is filled with a metal oxide water-based nanofluid working medium, the volume of the nanofluid working medium is 40% to 60% that of the evaporation segment, and metal oxide is aluminum oxide or copper oxide or silicon dioxide. According to the heat pipe and the manufacturing method of the heat pipe, nanofluid and multi-hole foamy copper are combined in the heat pipe, and the heat transfer efficiency of the heat pipe is improved.

Efficiency and/or power are increased in a turbine engine by using a self-contained, passive heat transfer device, such as a heat pipe, to transfer heat from working fluid in one section of the engine to working fluid in another section of the engine.

The invention relates to a foam diamond reinforced paraffin phase change energy storage material and a preparation method of the foam diamond reinforced paraffin phase change energy storage material. The phase change energy storage material comprises a surface reinforced foam framework, paraffin, a fire retardant and a paraffin support material; and a surface reinforcing layer of the foam framework is chosen from one of a diamond film, a graphene wall, a carbon nano tube wall, a graphene coated diamond film, a carbon nano tube coated diamond film, and a carbon nano tube/graphene coated diamond film. The phase change energy storage material is reasonable in structure, high in heat conductivity coefficient and stable in performance; and graphene or/and the carbon nano tube is/are modified on the surface, so that the heat conducting property of the foam framework is further improved, and the heat transfer efficiency of the existing energy storage material is effectively improved. The excellent chemical inertness of the diamond effectively avoids the corrosion of a metal framework in the phase change material, the prepared foam framework is not only suitable for the organic phase change energy storage material, is but also strongly compatible with and adaptive to the inorganic hydrous salt phase change material, and the phase change energy storage material is applied in the high-temperature high-power high-energy-consumption field.

The invention discloses a method for separating mixed gas by a hydrate process. The method for separating the mixed gas by the hydrate process is characterized in that hydration reaction and dissociation of the gas are sequentially and alternately carried out in the same reactor, so that the formation and decomposition heat of the hydrate is perfectly coupled; the external cooling and heating are not needed basically in the separation process; the heat of the whole process is basically balanced; the temperature and the concentration of an accelerant in a solution in the separation process remain stable; the separation operation stability is high; the heat transfer efficiency is high; the hydrate slurry does not need to be conveyed. The separation process and device are simple, convenient to operate, low in energy consumption, low in cost, wide in application range, remarkable in economic and social benefits and wide in future market prospect; the industrial and automatic production is easy to implement.

Disclosed is a liquid cooling radiation system. The technical solution used by the present invention to solve the technical problem is: the liquid cooling radiation system comprises: a radiation device, comprising cooling pipes and a radiation structure device arranged on the cooling pipes; a pumping device, integrally arranged between the cooling pipes and generating power so that a coolant circulates within the cooling pipes; a heat absorption device, attached to a heating device and having a heat conduction effect with the heating device; a pipeline, used for connecting the radiation device and the heat absorption device. On the basis of existing products, the present invention utilises a solution wherein a liquid pump main body and a radiator are integrally arranged together. Thus, the radiation of a fan is used to take away heat on the radiator and heat generated by a pump power main body (i.e. a motor) itself is also taken away, thereby extending the service life of the motor. In addition, the occupied space is significantly reduced, the heat transfer effect is significantly improved, and the production and assembly costs are reduced, so that product assembly is convenient and efficiency is high.

The invention relates to a heat exchange tube internally provided with spiral fins and application thereof. The heat exchange tube internally provided with the spiral fins comprises a heat exchange tube (1) and is characterized in that the heat exchange tube (1) is internally provided with the spiral fins (2) which are spiral; and the spiral fins (2) are distributed in the form of one or more sections along the axial direction at the inner side in the heat exchange tube (1). Meanwhile, the heat exchange tube internally provided with the spiral fins can be arranged in a radiation section furnace tube of an ethylene cracking furnace and can also be arranged in other heat exchangers, such as a shell-and-tube heat exchanger. The heat exchange tube achieves the purposes of increasing the heat transfer efficiency, strengthening the heat transfer effect, reducing coking, reducing the capacity consumption and increasing the life cycle of the equipment. Meanwhile, the spiral design also reduces the washing and abrading phenomena of high-speed fluid in the heat exchange tube to the interior of the tube body, thereby the heat transfer effect is further strengthened.

The invention discloses a simulated liquid absorbing core for a heat uniformizing plate. The simulated liquid absorbing core is structurally characterized in that based on efficient transport structure of a plant leaf, a novel heat uniformizing plate in the simulated transport structure of the plant leaf is designed according to the point-to-surface transport principle of the plant leaf and the shortest path principle of transport. The heat uniformizing plate can be integrally designed with the liquid absorbing core, so that working medium can quickly enter a fractal passage under the action of capillary pressure, can quickly enter a polygonal microstructure tissue enclosed by the fractal passage and can reach the integral condensing surface of the heat uniformizing plate rapidly, and the working medium is quickly condensed into liquid state and can return to an evaporating end under the action of the capillary pressure, and one cycle is completed for preparation of the next evaporation. Meanwhile, due to the polygonal micropassage structure of a simulated vein structure, the liquid working medium is promoted to quickly flow to the periphery of a condensing end along the network passage of the liquid absorbing core, circulation of a working medium transport loop is accelerated, heat transfer efficiency is improved, and the simulated liquid absorbing core is small in size and applicable to precise electronic equipment.

The invention relates to a uniform heating plate cooling device with a support post structure and a fabrication method of the cooling device. The cooling device comprises a wind shielding plate, eddyfans and a uniform heating plate heat sink, wherein the uniform heating plate heat sink comprises a working cavity, a composite backflow structure, capillary structure support posts and a nanometer liquid-state working medium, the working cavity is formed by welding an upper cover plate and a lower cover plate, the upper cover plate is provided with rippled-shaped cooling fins, the lower cover plate is provided with heat conduction bosses, the composite backflow structure comprises upper cover plate grooves, a first silk-screen capillary liquid absorption core, lower cover plate grooves, a second silk-screen capillary liquid absorption core and support posts, the support posts are provided with capillary structures, and a plurality of through holes are formed in the first silk-screen capillary liquid absorption core and the second first silk-screen capillary liquid absorption core and are used for the support posts to penetrate through. By the support posts with the capillary structures, the backflow speed of the liquid-state working medium in the working cavity of the uniform heating plate and the heat transfer efficiency are improved, the structure strength is improved, the cooling device is applicable to an occasion where a single heat source and multiple heat sources are horizontally or vertically arranged, the application range of the uniform heat plate heat sink is expanded, and the cooling device has the characteristics of compact volume, high safety, high environmental adaptability and the like.

A method of immersing-burning-evaporating percolating water of second-phrase landfills, which could dispose percolating water of landfills, leach liquor of refuse burning factories and high concentration organic waste water. Burning landfilled gases or other goods as sources of energy, the resultant high-temperature gases are entered the inner of liquid of a two-stage evaporating unit, evaporating and concentrating the percolating water,the condensated liquor could be discharged for coming up to standards, the concentrated water should be solidified, landfilled, burned or recharged. The process could separate volatile organic compounds and water from percolating water, volatile organic components are mostly oxidizing into CO2 and H2O, which reduces the pollution on environment. Steam produced in the second-step evaporating unit could preheat the original percolating water, which improved heat conductive efficiency, and saving energy.

The invention discloses a wearable type flexible temperature-difference power generation structure with a stretchable wire. The structure comprises a flexible thermal conductive silica gel cushion, a temperature-difference power generation layer, a thermal conductive patch and a metal cooling fin from the wearable surface to outside in sequence; the cold end plane and the hot end plane of the temperature-difference power generation layer are connected with the bottom surface of the thermal conductive patch and the upper surface of the flexible thermal conductive silica gel cushion respectively; and the upper surface of the thermal conductive patch is connected with the bottom surface of the metal cooling fin. When the wearable surface is adhered to non-planar human body skin, the stretchable wire and a polydimethylsiloxane package absorb deformation stress so as to avoid cracking of a bismuth telluride based thermoelectric arm with a poor mechanical performance and to avoid failure of electrode connection; the flexible thermal conductive silica gel cushion is packaged on one side of the hot end of the temperature-difference power generation layer, so that the tight contact with the skin of a user is ensured, and the heat transfer efficiency is improved; the cold end of each rigid temperature-difference power generation module is equipped with the independent thermal conductive patch and metal cooling fin, so that the structural thickness and quality are reduced and the temperature difference between the cold end and the hot end is increased; and in addition, the wearable type flexible temperature-difference power generation structure can be used for supplying power to wearable type medical apparatuses and has the value of popularization and application.

The invention relates to a passive phase-change material cooling system for a power battery of an electric automobile. The system comprises: one or more battery modules, wherein each battery module comprises a plurality of cells which are connected through welding of metal connection pieces; a battery box used for accommodating the one or more battery modules; a composite phase-change material which realizes storage and release of energy through reversible solid and liquid phase change of an included phase-change material; graphite flakes with high thermal conductivity; and a plurality of threaded fasteners used for fastening the box body. Compared with the prior art, the invention has the following advantages: the graphite flakes with high thermal conductivity and compressed expanded graphite are used as reinforcing heat transfer measures for the system; through combined usage of the graphite flakes with high thermal conductivity and the composite phase-change material, the cooling system has the beneficial effects of high heat transfer efficiency, a simple structure, small occupied space, good temperature consistency of a battery pack and a high energy utilization rate.

The invention relates to a fin tube type heat exchanger of a side positioned longitudinal vortex generator. The fin tube type heat exchanger is provided with a plurality of groups of straight substrates which are mutually arranged at intervals of a certain spacing and mutually parallel and a plurality of heat exchanging tubes vertically penetrated through the straight substrates, and a triangle winglet shaped longitudinal vortex generator is arranged at the two sides of each heat exchanging tube. In the heat exchanger of the invention, a plurality of triangle winglets are arranged at the two sides of the heat exchanging tubes, to prompt that the longitudinal vortex is formed at the air side, and simultaneously, a speed passage is formed among the heat exchanging tube wall, the triangle winglets and the fin, to ensure that the boundary layer separation point at the position of the heat exchanging tubes wall is delayed, the wake zone at the back of the heat exchanging tubes is diminished, the boundary layer is attenuated, and the mixture of cool and hot fluids is improved, thereby the heat exchange is greatly enhanced and the resistance force is slightly increased. The fin tube type heat exchanger has the advantages that heat transfer efficiency is high, the structure is compact, the floor area occupation is small, thus to be suitable for large-scale mechanized production.

A plasma display panel (PDP) which can reduce the cost and time of manufacturing a plasma display device, and which can improve heat transfer efficiency of a plasma display device, comprises: a transparent front substrate; a rear substrate disposed parallel to the front substrate; an electromagnetic wave shielding layer fixed on the front substrate; a plurality of discharge cells defined by barrier ribs disposed between the front substrate and the rear substrate; a plurality of address electrodes extending over the discharge cells and disposed in a given direction; a rear dielectric layer covering the address electrodes; a plurality of fluorescent layers disposed in the discharge cells; a plurality of sustaining electrode pairs extending in a direction which crosses the given direction of the address electrodes; a front dielectric layer covering the sustaining electrode pairs; and a discharge gas filling the discharge cells.

An improved heat exchanger, and, particularly, for an automotive vehicle, is disclosed. The heat exchanger typically includes at least one end tank; and a plurality of spaced apart metal tubes with fins between the spaced tubes. The heat exchanger may be single or multi-pass. In preferred embodiments, the heat exchanger is arranged to be single pass or two-pass and has tubes or tube arrangements to improve heat transfer efficiency.