132results about How to "Increase thermal contact area" patented technology

The invention provides a three-dimensional graphene / phase change energy storage composite material and a preparation method thereof. The technical scheme is as follows: graphene and a phase change energy storage material are in situ compounded, wherein porous graphene with a three-dimensional structure is used as a heat conductor and a compound die, and a solid-liquid phase change organic material is used as the energy storage material and filler. The three-dimensional porous graphene is compounded with the phase change material, the phase change energy storage material is partitioned in a plurality of pore spaces and is in tight joint with the graphene wall so as to greatly increase the effective heat contact area, and the highly linked graphene three-dimensional heat conduction network channels can realize rapid system heat exchange. In addition, due to the capillary adsorption capacity of porous graphene, the liquid-state phase change energy storage material is localized, so as to effectively prevent seepage. Therefore, the three-dimensional graphene foam has good designability, and becomes a lighter and more effective heat dissipation material for electronic devices.

A thermal interface material (TIM) includes a macromolecular material and carbon nanotubes embedded in the macromolecular material. The TIM has a first surface and an opposite second surface. Each nanotube is open at opposite ends thereof, and extends from the first surface to the second surface. Two ends of each nanotube extend out from the two surfaces of the thermal interface material and form two bent ends. A method for manufacturing the TIM includes: (a) forming an array of carbon nanotubes on a substrate; (b) submerging the nanotubes in a liquid paraffin; (c) solidifying the liquid paraffin; (d) cutting the paraffin in a direction perpendicular to long axes of the nanotubes, whereby each nanotube is open; and (e) cutting the paraffin in the same direction according to a predetermined thickness to obtain the thermal interface material, whereby each nanotube is open.

A thermal interface material (TIM) includes a macromolecular material and carbon nanotubes embedded in the macromolecular material. The TIM has a first surface and an opposite second surface. Each nanotube is open at opposite ends thereof, and extends from the first surface to the second surface. Two ends of each nanotube extend out from the two surfaces of the thermal interface material and form two bent ends. A method for manufacturing the TIM includes: (a) forming an array of carbon nanotubes on a substrate; (b) submerging the nanotubes in a liquid paraffin; (c) solidifying the liquid paraffin; (d) cutting the paraffin in a direction perpendicular to long axes of the nanotubes, whereby each nanotube is open; and (e) cutting the paraffin in the same direction according to a predetermined thickness to obtain the thermal interface material, whereby each nanotube is open.

The invention discloses a recoverable flexible temperature sensing cable. A cable core is composed of three conductors and a supporting core. Each conductor comprises a wire and an insulating layer, wherein the wire is located in the middle, and the insulating layer coats the wire. The insulating layers are made of negative temperature coefficient heat sensitive material. The supporting core is composed of three metal supporting plates, and the included angle between every two adjacent metal supporting plates is 120 degrees. The three conductors are longitudinally arranged between every two adjacent metal supporting plates respectively, and the conductors adjoin to every two adjacent metal supporting plates adjacent to the corresponding conductors. A one-side metal and plastic composite belt coats the cable core, the metal layer of the one-side metal and plastic composite belt is arranged inwards, and the plastic layer of the one-side metal and plastic composite belt is arranged outwards. An inner sheath coats the one-side metal and plastic composite belt, an outer sheath coats the inner sheath, and a lubricating layer is arranged between the inner sheath and the outer sheath. The recoverable flexible temperature sensing cable is stable in structure and high in flexibility, and can be safely used in the overload or high temperature environment.

The invention discloses a photovoltaic photo-thermal integrated device with a night radiation refrigeration function. The device comprises a body module and a transmission module; the body module is abox body with openings in the top surface and the bottom surface, a heat collecting plate and a radiation refrigerating plate are arranged in the box body, the heat collecting plate and the radiationrefrigerating plate form a closed cavity with four side walls of the box body, the closed cavity forms a fluid heat exchange cavity, and a water inlet and a water outlet are formed in the two side walls of the box body; photovoltaic cells are uniformly arranged on the outer surface of the heat collecting plate of the closed cavity, a glass cover plate covers the position, corresponding to the opening of the box body, of the heat collecting plate, and a full-wave-band high-transmittance material film covers the position, corresponding to the opening of the box body, of the radiation refrigerating plate; and the transmission module comprises a motor, two connecting rods, two cranks, two rotating shafts, two supporting shafts and a bracket, so that the top surface and the bottom surface of the box body can be freely switched by starting the motor. The device integrates photovoltaic power generation, solar heat collection and night radiation refrigeration functions, and has the advantagesof being high in heat collecting efficiency, adjustable in angle, good in practicability and the like.

The invention relates to a silicon carbide micro-channel heat dissipation structure of a three-dimensional integrated circuit and a manufacturing method thereof, and mainly solves the problem that a micro-channel wall material is low in heat conductivity and small in contact area with the micro-channel wall in the prior art. The silicon carbide micro-channel heat dissipation structure comprises an upper chip (1) and a lower chip (2), wherein each chip comprises a circuit layer (3), a silicon substrate (4), a silicon channel wall (5), a silicon carbide channel wall (6), a micro-channel (7) and a silicon micro-channel cap (8) from top to bottom, wherein each circuit layer is positioned on the top of the front side of the corresponding chip, and each silicon substrate is adjacent to the corresponding circuit layer and is positioned below the corresponding circuit layer; each silicon channel wall is adjacent to the corresponding silicon substrate and is positioned below the corresponding silicon substrate; each silicon carbide channel wall epitaxially grows below the corresponding silicon channel wall; the cross section of each micro-channel is of an integral structure with a semi-elliptical upper part and a rectangular lower part, and each micro-channel is positioned below the corresponding silicon channel wall. The heat dissipation contact area close to the circuit layers is increased, the distances with the circuit layers are shortened, and the heat dissipation performance of the micro-channel heat dissipation structure is improved.

The invention relates to a light source module with good heat dispersion, which comprises a printed circuit board, a radiator element and a light-emitting element. The printed circuit board is provided with a first surface, a second surface that is opposite to the first surface and a through hole that runs through the first surface and the second surface; the radiator element comprises a base, a heat conducting part and a plurality of heat dissipation fins; the base comprises a third surface and a fourth surface that is opposite to the third surface; the position of the corresponding through hole of the base is provided with a groove that is opened inwards from the third surface; the heat conducting part is embedded in the groove and forms thermal connection with the lateral walls of the groove; a plurality of the heat dissipation fins extend from the fourth surface towards the direction that is far away from the third surface; the light-emitting component is positioned in the corresponding through hole with a light-emitting surface thereof outcropping on the first surface and forms electrical connection with the printed circuit board and thermal connection with the heat conducting part of the radiator element., By means of the structural configuration of the printed circuit board and the radiator element, the light source module of the invention can effectively remove the heat generated by the light-emitting component.

The invention relates to a deoxyribonucleic acid (DNA) fragment amplification and quantitative detection system based on closed reactors, belonging to the technical field of molecular biology detection systems. The DNA fragment amplification and quantitative detection system comprises an amplification unit. A group of closed reactors are arranged in the amplification unit in a matching way. An exciting light device and a fluorescence detection device are arranged on one side of each closed reactor in a matching way. A transmission device which is used for providing power to the closed reactors is arranged at the bottom of the amplification unit in a matching way. The transmission device is connected with a motor. Two or more than two independent constant-temperature areas at different temperatures are arranged in the amplification unit in a matching way. By adopting the technique, the thermal response of reagent samples is improved, the polymerase chain reaction process is accelerated and the experimental period is greatly shortened; the degradation of DNA enzymes is reduced, the amplification sensitivity, accuracy and reproducibility of the samples are improved and the reagent detection linearity range is expanded; the pollution risk during experiments is reduced; the optical path is shortened and the sensitivity and the low background of optical detection are improved; and the low-cost multi-sample multi-channel detection is realized.

The invention relates to a rectangular plane magnetically controlled sputtering cathode, which is provided with a target, a cathode component and a shielding case which is arranged on the periphery of the cathode component, wherein a magnetic circuit mechanism is fixedly arranged on a target seat and is located inside a cathode body, the target is fixedly arranged on the lower portion of the target seat, and the cathode is characterized in that a magnetic conductive plate is arranged on the periphery of the cathode component and located on the inner side and the outer side of the shielding case in a whole circumference mode. The cathode of the invention can effectively increase the stability of a sputtering process and can increase the availability ratio of the target.

The invention provides a tab cooling structure of a battery pack, the battery pack and a vehicle with the battery pack. The tab cooling structure of the battery pack comprises tab connection pieces, insulating heat conduction blocks and liquid cooling plates, wherein the tab connection pieces are electrically connected with tabs of every two adjacent battery cells of the battery pack; clamping slots are formed in the insulating heat conduction blocks, and provided with first surfaces and second surfaces which are parallel to each other, and third surfaces connected with the first surfaces and the second surfaces; furthermore, connection parts, connected with the tabs of the battery cells, of the tab connection pieces are clamped in the clamping slots, so that at least the first surfaces and the second surfaces are respectively in surface contact with the two opposite side surfaces of the connection parts, and heat generated by the tabs can be exported to the insulating heat conduction blocks; the liquid cooling plate is in surface contact with the insulating heat conduction blocks; meanwhile, cooling liquid can flow through the liquid cooling plate to cool the insulating heat conduction blocks. The invention further provides the battery pack with the tab cooling structure and the vehicle with at least one battery pack.

The present invention relates to a heat sink having juxtaposed heat pipes and a method for manufacturing the same. The heat sink includes a base, a plurality of heat pipes and a pair of side strips. The base has a surface on which an open trough and an insertion trough on both sides of the open trough are provided. Each heat pipe has an evaporating section. The evaporating sections are juxtaposed in the open trough and adhered to each other. Each evaporating section has a planar surface. The side strips are fixed into the insertion troughs and protrude from the surface of the base. The planar surface of each evaporating section and the outer surface of each side strip are coplanar. By this structure, the thermal contact surface between the heat pipes and electronic heat-generating sources is increased, so that the heat-dissipating efficiency of the heat sink is improved.

An electronics assembly for a photovoltaic panel includes a substrate of a thermally conductive material, wherein the substrate defines a thermal contact area for thermally contacting the electronics assembly to a photovoltaic panel; and at least one electronic component provided on the substrate and in thermal contact with the substrate, so that when the electronics assembly is in thermal contact with the photovoltaic panel. The thermal contact provides a heat conductive channel between the at least one electronic component and the photovoltaic panel, wherein the heat conductive channel enables the electronics assembly to use the photovoltaic panel as a heat sink for heat produced by the at least one electronic component.

An absorber (1) for a thermal solar collector, comprising an absorber sheet (3) and at least one thermal fluid tube (5) that is connected in a thermally conducting fashion to the absorber sheet (3) and is connected to the absorber sheet (3) by means of a welded joint, is characterized in that the welded joint is formed from a number of linearly extended weld seam sections arranged sequentially along the thermal fluid tube (5) and respectively separated from one another by a section without weld seam, the direction of the linear extent of the weld seam sections corresponding to the axial direction of the extent of the thermal fluid tube.

The invention discloses a preparation method of a ginkgo leaf extract, characterized by comprising the following steps of: (1) extracting pulverized ginkgo leaves by a C1-C2 alcohol or C1-C4 ketone solvent and an adverse gradient continuous extraction device, and filtering, wherein 200kg-260kg of ginkgo leaves are fed per hour, and 1.8m<3>-2.0m<3> of solvent is fed into the device per hour; (2) concentrating the filtrate by a film evaporator; (3) centrifuging the concentrated liquid by a centrifugal device; (4) extracting the centrifuged concentrated liquid by one or more ketone solvents; (5)enabling the extract liquid to pass through macroporous resin, taking the effluent liquid part; (6) concentrating the effluent liquid by a film evaporator; and (7) enabling the concentrated liquid topass through a sterilizing filter and performing spray drying. The quality index of the ginkgo leaf extract obtained by the method disclosed by the invention meets the standard of European bulk drugs, the quality and grade of the product are better improved, and the method is easier to implement.

A stick free frying pan with a highly antifriction highly thermo efficiency and manufacturing technique thereof is disclosed, which belongs to the household cooking utensil field. It comprises a pot body and a stick free layer installed inside the inner surface of the pot body. It is characterized in that the pot are designed to be a bi-part type structure of the pot wall(1) and pot bottom(3), and being rivet welded, melt welded and braze welded into a hybrid type pot body through dead joint member. Conduct supersonic speed electric arc spay coating uneven fine micro particle layer after the surface coarsening of the pot body and before the spray coating of the stick free layer. Compared with the prior arts, it has advantages of high efficiency, firm combination between the pot bottom and pot wall, high antifriction and long service life of the anti stick life and can fry the dish directly by stainless metal turner.

An LED lamp comprises a light-permeable lamp cover, a radiating base, LED light emitting units, a layout circuit conductive layer and a fixing mechanism, wherein the layout circuit conductive layer is connected with the LED light emitting units electrically, and the fixing mechanism is used for fixing the LED lamp at a set position. The LED light emitting units are fixed on the radiating base. The light-permeable lamp cover and the radiating base are mounted together to form a containing cavity for containing the LED light emitting units. The fixing mechanism is fixed on the radiating base directly, integrated to the radiating base, fixed on the light-permeable lamp cover directly, or integrated to the light-permeable lamp cover. Radiating through holes, which match with the LED light emitting units in arrangement, are further arranged among the LED light emitting units. Each LED light emitting unit is adjacent to the corresponding radiating through hole which penetrates through the light-permeable lamp cover and the radiating base. Both ends of each radiating through hole are communicated with air to form an air convection radiating passage. The LED lamp has the advantages that the LED lamp is simple in structure and effective in radiating, and the service life of the LED light emitting unit is long.

The invention relates to a heat radiator, comprising a first radiating fin group and a second radiating fin group, wherein, each radiating fin group comprises a side plate arranged at one side of the radiating fin group and a plurality of radiating fins connected with the side plate; the side plate of the first radiating fin group is jointed with the side plate of the second radiating fin group; at least one side plate is sagged downwards to form a containing part used for containing a direct-insertion heating electronic component; and the electronic component is contained in the containing space between the two radiating fins. The contact area between the electronic component and the radiator is large, and the heat transfer rate is high, so as to improve the heat radiating effect.

The invention relates to a portable central processing unit (CPU) controlled high-power electric welding machine. The electric welding machine comprises a CPU control circuit board, a radiator, an air fan and a shielding layer which are arranged in a shell; and a high-frequency resonant soft switch circuit which consists of four insulated gate bipolar transistor (IGBT) power transistors Q1, Q2, Q3 and Q4, two resonant inductors L1 and L2, a high-frequency transformer T1, two fast recovery diodes D1 and D2, an input filter capacitor C1, a resonant capacitor C2, an output filter capacitor C3 and a ferrite reactor L3 is also arranged in the shell. The CPU control circuit is adopted to realize digital button operation, a pulse width modulation (PWM) wave form is output by CPU given control current to control a driving transformer, the on / off of the IGBT power transistors is regulated to control the high-frequency transformer to do work, rectification is performed by the fast recovery diodes, the resonant inductors and the resonant capacitors play a role in realizing resonant frequency and feeding back energy, and the resonant frequency and the energy are finally output by the ferrite reactor. The CPU centralized control is realized; moreover, the high-power electric welding machine has low fault rate, high insulativity, a good dust blocking effect and long service life, is convenient to operate, saves energy, reduces consumption, prevents interference, and is low in production cost and use cost.

The invention relates to the technical field of energy, and discloses a solar high-temperature heat collecting and storage gas turbine power generation device. The solar high-temperature heat collecting and storage gas turbine power generation device comprises a combustion chamber, a solar heat collector, a chemical heat storage tank, a three-way valve A and a three-way valve B. The chemical heatstorage tank is provided with a high temperature side and a low temperature side. One outlet of the three-way valve A is connected with a compressed air inlet of the solar heat collector, and the other outlet of the three-way valve A is connected with an inlet of the three-way valve B. One outlet of the three-way valve B is connected with the low temperature side of the chemical heat storage tank,and the other outlet of the three-way valve B is connected with an inlet of the combustion chamber. A compressed air outlet of the solar heat collector is connected with the high temperature side ofthe chemical heat storage tank and the inlet of the combustion chamber, and the low temperature side of the chemical heat storage tank is also connected with the inlet of the combustion chamber. The solar high-temperature heat collecting and storage gas turbine power generation device consumes less fossil fuel, is longer in service life and has better on-grid electricity quality.

The invention discloses an LED (light emitting diode) lamp which comprises a light-emitting lamp cover, a cooling base, more than two LED light emitting units, a layout circuit conductive layer electrically connected with the more than two LED light emitting units, and a lamp cap, wherein the LED light emitting units are fixed on the cooling base; cooling straight through holes matched with the arrangement manner of the LED light emitting units are arranged among the LED light emitting units, each LED light emitting unit is adjacent to one cooling straight through hole; the cooling straight through holes penetrate through the light-transmitting lamp cover and the cooling base; the two ends of the cooling straight through holes are both communicated with outside air to form a convective air cooling channel; cooling fins are extend to one surface of the cooling base, which faces the lamp cap; each cooling fin is provided with a clamping groove, and bosses matched with the clamping grooves are arranged at the inner side of the lamp cap; the two ends of the cooling straight through holes are both communicated with outside air, and lateral clearances between the cooling straight through holes and the cooling fins form a convective air cooling channel. The LED lamp has the advantages of simple structure, convenience in installation, good cooling effect and attractive appearance.

The invention discloses a liquid tobacco tar type electronic cigarette heater and an electronic cigarette. The heater comprises a thick film heating layer and a first porous ceramic layer which fits one side face of the thick film heating layer, wherein the thick film heating layer comprises a substrate, a heating circuit layer which is arranged on a first surface of the substrate, a conductive layer which is connected with the heating circuit layer and a guiding wire which is connected with the conductive layer, and the first porous ceramic layer fits a second surface of the substrate. The heater has the advantages that when the thick film heating layer is electrified, the whole substrate can be heated through the heating circuit layer, liquid tobacco tar is attracted by the first porousceramic layer to reach the contacting face of the first porous ceramic layer and the substrate to absorb heat and for atomized steam, the thermal contacting area is larger, the heating efficiency andheating responding speed are improved, no harmful substance is generated by the direct contact of the liquid tobacco tar and the substrate, which facilitates the health of a user.

The invention relates to the technical field of FLIR (Forward Looking Infra-Red) thermal imagers, especially a shielding protection cover for an FLIR thermal imager. The cover comprises a protection housing, wherein side of the protection housing is provided with an air incoming channel, and the other side of the protection housing is provided with an air outgoing channel. The top of the protection housing is provided with an air exhaust channel. Air can move along the inner wall of a diffusion tube, and is exhausted from one end with the bigger diameter of the diffusion tube shaped like a circular truncated cone. Meanwhile, the end with the bigger diameter of the diffusion tube shaped like the circular truncated cone is greater than the height of the FLIR thermal imager, can achieve the heat dissipation of the whole FLIR thermal imager, and facilitates the increase of the heat dissipation contact area. When an air blowing disc makes contact with air, grids rotate with a rotating shaft, and air is exhausted from a gap between the two grids, thereby facilitating the dividing of air, and preventing the excessive temperature change of the FLIR thermal imager from causing the damages to the housing. A wind ball rotates to exhaust the hot air flow from the inside of the protection housing, thereby preventing the circulation of the hot air in the protection housing from causing impact on the heat dissipation efficiency.

The invention discloses a heat radiation structure for an electronic component. The heat radiation structure comprises a shielding shell, two mute fans, a heat conduction rubber layer and a heat conduction metal sheet; a PCB plate is arranged in the shielding shell; the PCB plate is provided with the electronic component; one mute fan is arranged on the top of the shielding shell and the other mute fan is arranged in the position of a diagonal line of the side part of the shielding shell to form air convection; the heat conduction rubber layer is arranged on the top of the electronic component; the heat conduction metal sheet is arranged on the top of the heat conduction rubber layer; a heat conduction groove is formed in the heat conduction metal sheet; and the heat conduction groove is formed by a plurality of metal strips arranged in parallel. By adoption of the structure and due to the setting of the heat conduction groove in the conduction metal sheet, the heat conduction structure is light in weight, large in heat conduction contact area, and rapid in heat conduction; meanwhile, the two mute fans can take away the heat absorbed by the heat conduction metal sheet in the convection manner; and in addition, due to the setting of the shielding shell and the heat conduction rubber layer, the electronic components can be separated mutually in heat conduction without causing signal interference.

A heat dissipation module used for an electronic device is provided. The electronic device has a heat source. The heat dissipation module includes an evaporator, a pipe, and a working fluid. The evaporator has a recess at an exterior surface of the evaporator, and the heat source is thermally contacted with the recess to transfer a heat generated from the heat source to the recess of the evaporator. The pipe is connected to an inner space of the evaporator and forms a loop. The working fluid is filled in the loop, wherein the working fluid in liquid passing through a portion of the inner space of the evaporator corresponding to the recess absorbs the heat and is transformed into vapor.

The invention discloses a 3D printing system suitable for a micro-gravity space environment. The 3D printing system comprises a housing (1) and a control unit (2) as well as a workbench (12) arrangedinside the housing (1), a base plate (11) arranged on the workbench (12), a feeding unit, and a processing head part, wherein the feeding unit comprises a storage device (4), a feeding mechanism (6) arranged at one end of the storage device (4) and an ejecting-out mechanism (3) arranged at the other end of the storage device (4); and the processing head part comprises a small laser unit (7). The invention further discloses a 3D printing method suitable for the micro-gravity space environment. The system avoids the crystallization risk that an amorphous alloy is connected and formed in a thermoplastic mode under a long-time high-temperature condition, can achieve coaxial feeding, is high in forming efficiency, guarantees uniform and continuous discharge, can form a part of any shape, can obtain a large-dimension amorphous alloy part with high forming quality, can keep good equipment work stability, and is especially suitable for on-track manufacturing in the space environment.

The invention discloses a double aluminum automobile radiator comprising a frame casing pipe, a mounting base and a cooling fan. The frame casing pipe is a hollow cylinder, and the mounting base is located on the outside wall of one side of the frame casing pipe, and fixedly welded with the frame casing pipe; the cooling fan is located on one side of the frame casing pipe; the rear surface of an aluminium plate a and the front surface of an aluminium plate b are each provided with heat emission holes, so that the heat emission contact area between the aluminium plates a and b and external coldair is increased, and the cold air enters a radiator; thus, the heat emission efficiency of the radiator is improved, and the rear surface of the aluminium plate a is provided with the cooling fan; fan blades are driven by a fan motor to rotate, so that the heat in an automobile engine is sucked out, and the heat emission efficiency of the radiator is further improved; the front surface of the aluminium plate b is provided with cooling fins, and the contact area between the radiator and the external cold air is increased through the cooling fins, so that the heat emission efficiency of the radiator is improved.