87results about How to "Increase the convective heat transfer area" patented technology

The invention discloses a configurational tree-shaped heat pipe radiator. The radiator consists of a high-thermal conductivity base plate, liquid-absorption cores, a radiating fin and working media, wherein narrow cavities are formed inside the base plate; the radiating fin is connected with the narrow cavities; communicated cavities are formed inside the radiating fin; the liquid-absorption cores are filled in the narrow cavities; the working media are filled in the narrow cavities and the communicated cavities; the radiating fin has a configurational tree-shaped structure and consists of a main communicated channel and at least two forked connection fins; the forked connection fins are arranged at the periphery of the main communicated channel circularly; and the communicated cavities inside the forked connection fins are communicated with the main communicated channel. The heat pipe radiator can quickly remove the heat which is generated by a plurality of (a single) local high-temperature heat flow heat source points (point) through phase change of the working media, so that local hot points are effectively eliminated, temperature of a heating surface of the heat pipe radiator is reduced, and safe, stable and efficient operation of electronic equipment is further guaranteed.

The invention provides a high-adjustment-ratio water-cooling premixed combustion high-strength heat exchange gas condensation boiler. The high-adjustment-ratio water-cooling premixed combustion high-strength heat exchange gas condensation boiler comprises a combustor and a heat exchanger, wherein the full-premixed combustor mounted in the center of a boiler top plate consists of a booster fan, a premixing chamber and a water-cooling combustion head; a flame stabilizing pipe and an anti-tempering column of the water-cooling combustion head can realize high-adjustment-ratio water-cooling premixed combustion; the heat exchanger consists of a lap of water-cooling wall and one or more laps of fins uniformly arranged in the peripheral direction by bent edge folding fin pipes; an air blower feedsair into the premixing chamber for fully mixing with gas to enter an inner cavity of a hole plate of the combustion head; the air flows out from a fire hole, and is sprayed out from narrow gaps amongthe water-cooling pipes distributed in the peripheral direction; after the air flows out from the flame stabilizing pipe, the air is ignited to uniformly combust in the peripheral direction and the axial direction, and radiates and releases heat to an inner pipe ring; smoke flushes base pipes and fins of inner and outer ring fin pipes in sequence to reinforce heat exchange; and the smoke downwards flows into a dew bearing disc through gaps between a housing and an outer layer fin pipe, and is exhausted into atmosphere from a smoke outlet. The high-adjustment-ratio water-cooling premixed combustion high-strength heat exchange gas condensation boiler is high in combustion load adjustment ratio, compact in heat exchange, low in nitrogen emission and high in heat efficiency.

The invention provides a fuel cell flow field plate and a fuel cell, and relates to the field of fuel cells. The fuel cell flow field plate is mainly suitable for hydrogen-air fuel cells and hydrogen-oxygen fuel cells. The fuel cell flow field plate comprises a flow field plate body, an air inlet, an air outlet, a flow channel, flow channel ridges and bosses, and the flow channel and the flow channel ridges are both arranged on the flow field plate; fluid enters the flow channel from the air inlet and flows out from the air outlet; and the flow channel ridges are arranged on the two sides of the flow channel, and the bosses are arranged on the side faces of the flow channel ridges in the flow channel direction at certain intervals. By introducing the boss structure, local turbulence is generated, and mass transfer and heat transfer of reaction gas to a gas diffusion layer are enhanced; the wall surface of the flow channel is divided by the bosses, so that the effective contact area ofliquid drops and the wall surface of the flow channel is reduced, a continuous water film is prevented from being formed, liquid water in the flow channel is not easy to accumulate, and the phenomenonof 'flooding' is relieved; and the boss structure also increases the convective heat exchange area, so that the heat exchange capacity of the flow field is enhanced, and the temperature distributionof the flow field is improved.

The invention discloses a tube shell type pulsating heat pipe heat exchanger, which comprises a shell pass, a tube pass, a sealing flange and a sealing head, wherein the sealing flange and the sealing head are arranged at the two ends of the shell pass; the tube pass is arranged in the shell pass and is divided into vertically communicated return fluid passages by a middle partition plate; a sealing flange and a sealing head at the two ends of the tube pass are fixed and hermetically connected with flange rings at the two ends of the shell pass; pulsating heat pipes are arranged on the tube pass and the shell pass; condensation sections of the pulsating heat pipes are positioned in the shell pass; and evaporation sections of the pulsating heat pipes are positioned in the tube pass. According to the tube shell type pulsating heat pipe heat exchanger, the pulsating heat pipes are inserted into the tube shell type heat exchanger in groups, so that the heat exchange space is fully utilized; and a corresponding heat pipe working medium is selected according to the size of a heat flow in a frictional heat exchange process, so that gradient utilization of energy is realized. In addition, the tube shell type pulsating heat pipe heat exchanger can be arranged in any direction and has the advantages of compact structure, small size, simple manufacturing process, convenience for assembly, disassembly and maintenance, no need of an external pump for driving flow, safety in use and excellent application prospect.

The invention relates to a chip cooling system comprising a semiconductor cooler used for actively exchanging heat in a transporting manner, and a chip radiator used for performing heat convection, wherein the semiconductor cooler is connected with a power supply; one side of the semiconductor cooler is a heating end while the other side is a cooling end, the heating end can be fit with a chip tobe cooled, and the cooling end is fit with the chip radiator; a superfine channel is arranged in the chip radiator, the chip radiator is connected with a circulating pipe with a power device to form acirculating loop, and cooling liquid is filled in the circulating loop. According to the system provided by the invention, the semiconductor cooler and the chip radiator are combined to form a two-stage heat exchange system, the semiconductor cooler provides relatively large heat dissipation heat-flow density through actively transporting heat energy, heat on the chip can be absorbed in time, andthe chip radiator dissipates heat to the external environment via the circulating pipe; the system is heat in heat dissipation efficiency, low in cost, free of noise, controllable in cooling capacityand good in cooling effect.

The invention relates to a tank type solar vacuum heat collecting tube with a one-sided inner fin, comprising a glass outer tube and a metal inner tube with a one-sided inner fin enhanced heat transfer structure, wherein two ends of the glass outer tube are sealed with the metal inner tube through corrugated tubes; the space between the glass outer tube and the metal inner tube is vacuum; the external surface of the metal inner tube is coated with a selective sunlight absorption coating; the inner fin is arranged on the inner surface of one side of the metal inner tube which absorbs focalized solar energy; and the inner fin and the metal tube are integrated. The inner fin introduces heat to the center of the metal inner tube, increases the heat convection area, reduces the temperature difference between the metal inner tube and a heat-conducting fluid, and improves the cooperation degree between the velocity field of the heat-conducting fluid in the heat collecting tube and the temperature field of the heat collecting tube. Furthermore, the inner fin also increases the strength and reliability of the heat collecting tube.

The invention provides a porous medium liquid-cooling cooling device, a manufacturing method and a use method thereof. A heat dissipating medium diversion groove is arranged on a substrate, and the heat dissipating medium diversion groove is provided with a heat dissipating medium inlet joint and a heat dissipating medium outlet joint. A porous medium module is filled in the heat dissipating medium diversion groove, so that a heat dissipating medium generates disturbance in a flowing manner in the heat dissipating medium diversion groove. A cover plate is covered on the substrate, and is sealingly connected with the substrate, so that the heat dissipating medium diversion groove forms a heat dissipating medium diversion cavity, and the heat dissipating medium flows in the heat dissipatingmedium diversion cavity. Thermal resistance of heat conduction is effectively reduced. A fluid flows through the internal of a porous medium, and heat convection is generated among the porous medium and a skeleton structure of the porous medium. The porous medium is large in specific surface area, and large in heat convection area. The skeleton structure is arranged in an intricate manner so thata fluid boundary layer on the surface of a skeleton is thinned or damaged, so as to reduce thermal resistance of heat convection. A porous medium liquid-cooling cooling plate can reduce thermal resistance during a heat transfer and enhance heat dissipation.

Provided is a DC charging pile air-cooling circulation system. The invention discloses a DC charging pile air-cooling heat dissipation system which solves the problem that an existing device is low inefficiency and high in consumption. The system includes an air-cooling heat dissipation module which is used for conveying cooling air to perform heat exchange with a heat-generating device and discharging hot air, thereby cooling a DC charging pile; the system can be divided into a duct, a gear-toothed heat pipe combined radiator and a fan; the duct is used for conveying cooling air to cool a power device and discharging hot air; the gear-toothed heat pipe combined radiator includes a gear-toothed radiator, an embedded heat pipe and a liquid metal heat-conducting fin and is used for conducting heat of the power device out to perform heat exchange with the cooling air; and the fan is used for sucking the cooling air from the outside of the system to make the cooling air flow in the duct.The system can effectively improve the comprehensive convective heat exchange capacity of the air cooling, and the air cooling effect is more obvious, ensuring that the heat generated inside the DC charging pile is effectively and timely discharged.

The invention discloses a multifunctional thermoelectric air conditioner fan which comprises an air conditioner fan component and a vertical rod component. The air conditioner fan component comprises a power component and a blade unit, and the power component comprises a power device and a rectifying circuit which are installed inside a cover; a heat conduction metal plate is installed on the front portion of the cover, a thermoelectricity module used for controlling the temperature of the heat conduction metal plate is arranged behind the heat conduction metal plate, one end of the thermoelectricity module is connected with the heat conduction metal plate, and the other end of the thermoelectricity module is connected with heat dissipation fins; the blade unit is arranged in front of the heat conduction metal plate and connected with the power device, and gratings is arranged outside the blade unit; the rectifying circuit provides direct currents for the thermoelectricity module and the power device; the vertical rod component comprises a vertical rod and a base, the vertical rod is connected with the cover, and switch buttons are arranged on the vertical rod; the base is arranged at the bottom end of the vertical rod. According to the air conditioner fan, a traditional fan is combined with the thermoelectricity module, refrigeration and heating can be achieved, the requirements in different seasons are satisfied, the indoor comfort is improved, the structure is simple, and no pollutants are generated.

The invention provides a discontinuous S-fin type heat exchange plate which is provided with a fluid inlet uniform distribution area, a fluid outlet contraction area and a discontinuous S-fin type area, the side edge of the heat exchange plate is of a sawtooth-like structure, and the discontinuous S-fin type area comprises a forward fin and a reverse fin which are the same in structure and different in arrangement position. According to the discontinuous S-fin type heat exchange plate, the fluid inlet and outlet flow channel form, the sawtooth-like structure and the forward and reverse S-shaped fin design are adopted, the convection heat exchange area of the heat exchange plate is increased, meanwhile, the flow distribution nonuniformity and the flow separation phenomenon of fluid are reduced, and the pressure loss of the fluid in the flow heat exchange process is reduced.

The invention discloses a heat dissipation module for battery thermal management. The heat dissipation module comprises a top cover plate, a cooling plate and an outlet pipeline. The top cover plate is provided with two fluid passages. The top cover plate and the outlet pipe are respectively located at the upper and lower ends of the cooling plate. The cooling plate is intenrally provided with a fractal microchannel. The inlet of the fractal microchannel is connected with a fluid pipeline flowing through the pole lug, and the outlet of the fractal microchannel is connected with the outlet pipeline. The cooling plate and lithium iron phosphate battery cells are alternately distributed, and the two sides of each lithium iron phosphate battery cell are attached to the cooling plate. The temperature of the battery module can be accurately controlled, the temperature of the battery module is controlled within a safe range and the temperature distribution is uniform; and the heat dissipationmodule has a compact structure and is beneficial to realize the weight reduction of the whole vehicle.

The invention belongs to the technical field of aero-engine turbine cooling, and relates to a bead type turbine blade trailing edge slit cooling structure. The cooling structure comprises a hollow turbine blade, an inner cavity cool gas channel and trailing edge exhaust slit channels, the inner cavity cool gas channel is formed inside the hollow turbine blade and used for allowing low-temperaturecool gas to flow inside the blade to cool the blade; and the trailing edge of the hollow turbine blade is provided with the plurality of discrete bead type trailing edge exhaust slit channels in the chordwise direction so as to allow the cool gas to be exhausted out of the blade. The bead type trailing edge exhaust silt has a repeatedly contracted and expanded channel structure, the convective heat exchange area of the cool gas and a channel inside the trailing edge of the turbine blade is effectively increased, and compared with an existing trailing edge middle slit structure, the bead type trailing edge exhaust slit has the repeatedly contracted and expanded channel structure, and can blow off a boundary layer and inhibit the boundary layer from thickening, so that heat exchange is enhanced.

The invention discloses a drying device. The drying device comprises a furnace body, a charging device for charging a material into the furnace body, a collecting device for collecting a dried material in the furnace body, an air supply device for inducing external hot gas into the furnace body by a first gas inlet, and a stirring device for stirring and pulverizing the material, wherein the stirring device comprises a rotary shaft which penetrates through a cavity of the furnace body, the rotary shaft is provided with a venting cavity provided with a plurality of gas nozzles, the gas spraying direction of the gas nozzles is misaligned and not parallel with the stirring direction of the stirring device and the stirring direction of blades, during material drying, the hot gas is induced into the cavity of the furnace body by the first gas inlet, and the rotary shaft rotates to drive a stirring assembly on the rotary shaft to continuously stir the material along the axial direction and radial direction of the rotary shaft, so that the material is turned over in the furnace body along the axial direction and radial direction of the rotary shaft, the stirring time of the material is prolonged, and a convection heat exchange area between the material and the hot gas is increased. In addition, the stirring assembly can pulverize the material to form a material of smaller particles, thus further increasing the convection heat exchange area between the material and the hot gas and improving the drying efficiency and drying effect of the material.

The invention relates to a sludge treatment system which comprises a conveying device, a water removal structure and a drying device. The drying device comprises a furnace body, a feed device used for adding materials into the furnace body, a material collection device used for collecting the dried materials in the furnace body, an air supply device used for leading external hot air into the furnace body through a first air inlet, and a stirring device used for stirring and smashing the materials. When the materials are dried, hot air is led into a cavity of the furnace body through the first air inlet, a second rotating shaft rotates and drives a stirring assembly on the second rotating shaft to unceasingly stir the materials in the radial direction and the axial direction of the second rotating shaft, and therefore the materials can roll in the axial direction and the radical direction of the second rotating shaft in the furnace body, the time during which the materials are stirred is prolonged, and the convective heat exchange area of the materials and hot air is enlarged. In addition, the materials can be smashed through the stirring assembly, materials with smaller particles can be formed, the convective heat exchange area of the materials and hot air is further enlarged, and the material drying efficiency and effect are improved.

The invention discloses an enhanced heat abstractor employing pulsating flow and a foam metal plate. The enhanced heat abstractor comprises a pulsating pump, a heat sink chamber, an accumulated liquid cavity and a cooler, wherein the pulsating pump conveys a cooling liquid into the accumulated liquid cavity through a liquid inflow pipe; the accumulated liquid cavity sprays the cooling liquid into the heat sink chamber; the heat sink chamber conveys the liquid which is subjected to heat transfer into the cooler to cool through a liquid discharge pipe; the pulsating pump sucks in the cooled cooling liquid from the cooler through a connecting pipe; the heat sink chamber comprises the foam metal plate, a heat transfer support plate and a cover board; the heat transfer support plate is connected with a high-heating flux device; the foam metal plate is fixedly connected with the heat transfer support plate; and a dispenser is vertically connected with the top of the cover board. The pulsating flow of the enhanced heat abstractor is matched with a dual-layer foam metal structure, so that transverse and longitudinal disturbance and mixing of working mediums can be increased; a thermal boundary layer is continuously recombined; and meanwhile, cavitation and vortex formation are caused by pressure change in the disturbance process, therefore, the heat transfer efficiency can be greatly improved.

The invention relates to the technical field of new energy utilization, in particular to a solar energy and fuel mixed heating heat collector. The heat collector can realize solar power generation when sunlight meets the power generation conditions, and uses a gas power generation device when no sunlight can be used. The heat collector comprises a base plate; a heat collector shell covers the baseplate; an internal heat regenerator outer shell, a cold air channel, a hot exhaust channel, an internal heat exchanger and a heat collector inner sleeve are arranged in the heat collector shell in sequence in a sleeved mode; a heat regenerator and a cylinder are arranged at the upper part of the base plate in a heat collector inner sleeve; a heat collecting device is arranged at the upper part ofthe heat collector shell; the bottom of the heat collecting device is sealed; the bottom of the heat collecting device and the upper part of the heat collector inner sleeve form a combustion chamber;a finned heating pipe is arranged in the heat collector inner sleeve; one end of the finned heating pipe is connected with a cold end of the cylinder, and the other end is connected with a hot end ofthe cylinder; and the bottom of the base plate is connected with a Stirling engine shell through a cylinder base.

The invention provides a micro-channel pipeline heat exchanger. The micro-channel pipeline heat exchanger comprises a heat exchanger pipeline and an end connector of the heat exchanger pipeline; the heat exchanger pipeline comprises an outer wall and an inner pipe; the inner pipe is a water flow channel; a plurality of micro-channels used to enable refrigerants to pass are arranged between the outer wall and the inner pipe; the micro-channels extend along the inner pipe in the axial direction; the micro-channels are orderly arranged around the outer side of the inner pipe and each two adjacentmicro-channels are not connected with each other; the sections of the micro-channels are squares, circles, ovals or polygons; connecting ribs are arranged at the inner pipe in the radius direction and the inner pipe is divided into a plurality of pipelines by the connecting ribs; at least two connecting ribs are arranged and the two connecting ribs are arranged in a staggered manner; one end of the end connector is connected with the micro-channels and the other end of the end connector is connected with a refrigerant pipeline of a refrigeration circulation system; a plurality of connecting ribs are designed at the inner pipe, so that the convection heat exchanging area of water can be greatly increased by the connecting ribs and the heat exchanging efficiency can be high; meanwhile, thebending-resistant strength of the pipeline can be strengthened and the pipeline is not prone to flatten during bending.

The invention provides an anti-vibration cooling wall of a ground gas turbine combustion chamber. The anti-vibration cooling wall comprises an inner wall and an outer wall, wherein the inner wall and the outer wall are connected by using screw type spring steel with incremental diameter and are arranged in a certain manner; a communicated cavity is formed between the inner wall and the outer wall. According to the anti-vibration cooling wall, by changing the wall surface structure of a main combustion chamber flame tube, the propagation of sound wave in a main combustion chamber is absorbed and changed, and then the phase difference between oscillation of sound pressure and fluctuation of heat release rate cannot remain unchanged all the time; meanwhile, the spring has a trimmer pressure effect, so that the occurrence of thermo-acoustic oscillation is effectively prevented. Through the arrangement of the spring in the anti-vibration cooling wall, the heat convection area of cooling air is increased, the cooling efficiency of cooling air is improved, and the anti-vibration cooling wall has a wide application prospect.

The invention discloses a gas condensation boiler with a narrow gap combustion and heat exchange function. The gas condensation boiler comprises a combustor and a heat exchanger, wherein the narrow gap combustor installed in the center of a boiler top plate is composed of a blower, a mixer and a water-cooled combustion head; the heat exchanger is formed by uniformly arranging three circles of corngrain-shaped straight pipes in the circumferential direction, wherein the inner circle of corn grain-shaped straight pipe and the outer circle of corn grain-shaped straight pipe are narrow in the inner sides and wide in the outer sides, and the third circle of corn grain-shaped straight pipe is coupled with the combustion head; the blower feeds air into the mixer to be fully mixed with gas, the mixture enters the combustion head cavity to be discharged from narrow gaps between the water cooling straight pipes which are uniformly distributed in the circumferential direction, after ignition, the mixture is uniformly combusted in the circumferential and axial directions and radiates heat towards the inner tube ring, the narrow gap between the inner and outer circles of straight pipes is washed by the flue gas in sequence to realize the intensified heat exchange of the narrow gap laminar flow, and the flue gas flows downwards into an exposed disc from the gaps between the outer shell andthe outer straight pipes and is discharged into the atmosphere from a flue gas outlet. The gas condensation boiler has the advantages of being simple in structure, capable of realizing laminar flow strengthening, compact in heat exchange, low in nitrogen emission and high in thermal efficiency.

The invention discloses a drying machine. The drying machine comprises a furnace body, rotating shafts, and stirring components, wherein the furnace body is arranged in the horizontal direction; the furnace body is provided with a feed opening through which materials are added and a discharge opening through which the materials are taken out; the rotating shafts are arranged in the cavity of the furnace body in a penetrating manner; the stirring components are arranged on the rotating shafts; the stirring components are used for stirring and crushing the materials in the axial directions of the rotating shafts and in the radial directions of the rotating shafts. According to the drying machine disclosed by the invention, when the materials are dried, under the driving of the rotating shafts, the stirring components can stir the materials in the axial directions of the rotating shafts and in the radial directions of the rotating shafts, so that the materials can be rolled in the furnace body in the axial directions of the rotating shafts and in the radial directions of the rotating shafts; besides, when the materials are stirred, the materials can also be crushed to form the materials with smaller particles, so that the area of heat convection between the materials and external environment is increased, the drying efficiency of the materials is improved, and the drying effect of the materials is improved.

The invention discloses a heat dissipation patch applied to a notebook computer, a desktop computer or an external M2 solid state disk. The heat dissipation patch comprises a thin porous foam metal copper layer, a bidirectional regular hexagon array heat dissipation layer, a specially-processed fixed copper sheet and a silica gel insulation pad. Various structural sizes are designed for the M2 solid state disk in the market, and the design of the efficient bidirectional regular hexagonal array heat dissipation layer and the like is utilized to realize the combination of light weight and efficient heat dissipation. And the fixed copper sheet plays a role of supporting and a reference surface. The silica gel heat-conducting insulation pad is connected with the user M2 solid state disk, so that the effects of bonding, buffering and electrostatic shielding can be achieved, and the contact thermal resistance between heat-conducting solid surfaces can be reduced. The heat dissipation patch is easy to install, the heat dissipation capacity of the hard disk can be greatly enhanced and the working temperature can be greatly reduced only by tightly attaching the heat dissipation patch to the hard disk by a user, the compression resistance and bending resistance of the M2 hard disk of the user can be improved, and the heat dissipation patch is light and easy to install.