108results about How to "Improve heat dissipation uniformity" patented technology

The invention relates to heat dissipation devices and discloses an enhanced heat dissipation device with pulsating flows and wavy-wall microchannels adopted. The device comprises a microchannel heat dissipation cold plate, a pulsating pump, a cooler, a liquid working medium injection pipeline and a liquid working medium return pipeline, wherein the liquid working medium injection pipeline and the liquid working medium return pipeline are used for connecting the microchannel heat dissipation cold plate, the pulsating pump and the cooler together, the microchannel heat dissipation cold plate is a rectangular thin plate and is composed of a microchannel heat sink and a microchannel heat sink cover plate, communicated liquid cavities are formed in the periphery of the microchannel heat sink, the part surrounded by the liquid cavities is divided into four equal parts by two perpendicular liquid division cavities located on the axis of symmetry of the rectangular thin plate, wavy-wall microchannels are distributed all over each equal part in the diagonal direction of the rectangular thin plate, four liquid working medium outlets are formed in the microchannel heat sink cover plate and connected with the liquid working medium return pipeline, and a liquid working medium inlet is formed in the microchannel heat sink cover plate and is connected with the liquid working medium injection pipeline. According to the device, the liquid working medium flowing path is fully optimized, and heat exchange efficiency is improved greatly.

The invention relates to a substrate cooling device based on the directional solidification characteristic of promoting laser additive reproduction. The substrate cooling device comprises a tank body.The top surface of the tank body is recessed downward to form a water tank with an upward opening. An inlet for inputting a cooling medium into the water tank is formed in one side of the tank body.An outlet for draining the cooling medium in the water tank is formed in the other side of the tank body. Both the inlet and the outlet are communicated with the water tank. A ring of sealing groove is formed in the portion, around the opening of the water tank, of the top surface of the tank body, and a sealing ring is arranged in the sealing groove. The cooling device further comprises a cover plate sheet for locking the edge of a substrate laid on the water tank onto the tank body, the cover plate sheet and the top surface of the tank body are detachably connected through a connecting partto clamp the substrate to the position between the tank body and the cover plate sheet, and the substrate covers the sealing groove. A window for exposing the upper surface of the substrate is formedin the cover plate sheet.

The invention relates to an automobile headlight, in particular to an air cooling type energy-saving automobile headlight which comprises a light source containing cavity defined by a shell and light-transmitting windshield, a light-transmitting hood, an inner column, a power introducing head, a light-emitting body and an actuator. The light-transmitting hood, the inner column, the power introducing head, the light-emitting body and the actuator are arranged in the light source containing cavity. The light-emitting body is an LED, the light-transmitting windshield is provided with an air inlet, an air outlet is formed in the shell, and the light-transmitting hood and the inner column define an air cavity. The light-emitting body is suspended in the air cavity through the inner column, the outer end of the inner column is fixedly connected to the power introducing head, and the power introducing head is electrically connected with the actuator. The power introducing head is detachably connected with the shell, the air cavity is filled with cooling air, and the air pressure in the air cavity is larger than one standard atmospheric pressure. The air cooling type energy-saving automobile headlight has the advantages that the cooling effect is good, cooling is even, the LED is used as a light source, and the problem that the LED can not be used as the light source due to the fact that an existing automobile headlight is poor in cooling effect is solved.

The invention discloses a kilowatt-level optical fiber cladding power stripper employing micro-channel water cooling, and the stripper comprises a heat sink. The heat sink comprises a housing and a lining part disposed in the housing. The housing is provided with a cooling water inlet and a cooling water outlet. The outer wall of the lining part is provided with a spiral groove, and two ends of the spiral groove are respectively communicated with the cooling water inlet and the cooling water outlet. The lining part is provided with a central through hole which is used for the passing of an optical fiber. The stripper employs a mode of micro-channel water cooling for heat dissipation. During the stripping of cladding optical power, the stripper can improve the temperature performance and characteristics of cladding optical power. Compared with a conventional optical fiber cladding power stripper, the stripper can improve the uniformity of heat dissipation, is higher in withstood stripped optical power, meets the requirements of 1000W stripped optical power, is simple in structure, is low in manufacture cost, and is suitable for batch production.

The invention relates to a multi-dimensional phase change radiator which comprises a radiator front side plate located in an XOY plane and a first set of fins vertically extending from the radiator front side plate to the Z direction at intervals. A plurality of second sets of fins are arranged at intervals in the direction perpendicular to the first sets of fins; the first sets of fins and the second sets of fins are crisscrossed; in the first set of fins, at least part of the fins are phase-change fins, and phase-change steam channels are formed in the phase-change fins; a phase-change baseplate is fixed to the outer side of a front side plate of the radiator, a base plate phase-change steam cavity is communicated with all fin phase-change steam channels to form a continuous closed vacuum environment, and a certain amount of phase-change working medium is placed in the continuous closed vacuum environment. The invention mainly aims at a natural convection radiator, the radiator greatly improves the heat dissipation efficiency and uniformity, greatly reduces the weight of the radiator, and reduces the volume of the radiator under the same heat dissipation boundary; the radiator is compact in structure, regular in shape, attractive in appearance and particularly suitable for heat dissipation of communication electronics, industrial transmission frequency conversion, inversionequipment and electronic components.

The invention discloses directional high-heat-conductivity ultrathin single-side adhesive tape and double-side adhesive tape, wherein the single-side adhesive tape comprises a base layer, a first heatconduction layer, a first heat conduction adhesive layer and a first release film layer; the first heat conduction layer, the first heat conduction adhesive layer and the first release film layer aresequentially arranged on the base layer; and the first heat conduction adhesive layer at least comprises a combination of a silica gel adhesive and graphene. According to the invention, a proper quantity of graphene and inorganic heat conduction filling materials are introduced into the silica gel adhesive to form a composite heat conduction system; through high-speed dispersion, the graphene andthe inorganic heat conduction filling materials are uniformly dispersed in a silica gel system; the graphene has extremely superior heat conduction performance, so that the heat conduction performance and heat dissipation uniformity of the heat conduction adhesive layer can be remarkably improved; the use reliability of the directional heat conduction adhesive tape is improved; in addition, the invention further introduces a modified nitrogenated flame retardant into the silica gel-graphene-inorganic heat conduction filling material composite heat conduction system; and the flame retardant performance and use safety of the directional heat conduction adhesive tape are further improved.

A heated brick bed type floor heating structure is composed of a base layer and peripheral supporting walls. The base layer is provided with a longitudinal groove by which a combustion chamber is formed. The front wall body of the peripheral supporting walls is provided with a firewood burning port and a firewood burning port closing door. Supporting stand columns are distributed on the base layer, heat accumulating plates are arranged on the supporting stand columns, the front sides of the heat accumulating plates are connected with the front wall body of the peripheral supporting walls, and a certain distance exists between the left sides, the right sides and the back sides of the heat accumulating plates and the left wall body, the right wall body and the back wall body of the peripheral supporting walls to form a left flue gas channel, a right flue gas channel and a back flue gas channel. Left flue gas circulation longitudinal grooves and right flue gas circulation longitudinal grooves all of which are communicated with the back flue gas channel, the left flue gas channel and the right flue gas channel are formed in the heat accumulating plates. Upper cover plates are arranged on the heat accumulating plates, the four sides of each upper cover plate are buckled on the upper end faces of the peripheral supporting walls in a lap joint mode, and the back wall body of the peripheral supporting walls is provided with a smoke outlet. According to the heated brick bed type floor heating structure, the floor heating system can supply heat through an economical and convenient method, and the heated brick bed type floor heating structure has the advantages of being low in using cost, high in thermal efficiency and comfortable in heating.

The invention provides a dry distillation furnace and a combustion chamber of the dry distillation furnace. The heating uniformity on carbonization chambers by the combustion chamber can be improved, so that the heated uniformity of coal layers in the carbonization chambers can be improved, and meanwhile the stability of partition walls between the combustion chamber of the dry distillation furnace and the carbonization chambers is improved. The carbonization chambers are arranged on the two sides of the combustion chamber; heat conducting partition walls are arranged between the carbonization chambers and the combustion chamber; the cross section of the combustion chamber is fan-shaped; a plurality of first partition walls distributed in the radial direction at intervals and a wedge-shaped wall are arranged in the combustion chamber, so that the combustion chamber is divided into a plurality of cavity passages, and the overall stability of the combustion chamber is increased; nozzles are arranged at the bottoms of the cavity passages, and are communicated with recycled coal gas and oxidant gas. Compared with the combustion chamber with larger space, the heating uniformity of the cavity passages are better and are also easier to control, then heat transfer uniformity of the carbonization chambers can be improved, and the coal layers in the carbonization chambers are heated more uniformly; two sides of the first partition walls are connected with the heat conducting partition walls on the two sides of the combustion chamber or the wedge-shaped wall, so that the heat conducting partition walls can be additionally supported, and the strength and the stability of the heat conducting partition walls can be improved.

The invention relates to a polyurethane adhesive and a preparation method for a polyurethane prepolymer of the polyurethane adhesive. The preparation method for the polyurethane prepolymer provided bythe invention uses raw materials with specific parts by weight and comprises the following steps: S1, mixing polyether polyol, a first diluent, a water absorbent, polyisocyanate and a catalyst, carrying out reaction under a vacuum condition until NCO reaches a preset target, and stopping heating; and S2, adding a diluent under a room temperature condition into the mixture obtained in the step S1,and carrying out stirring under a vacuum condition; wherein the ratio of the first diluent used in the step S1 to the first diluent used in the step S2 is 1: (1-3). According to the invention, one part of the diluent in the adhesive component is used for synthesizing the prepolymer for the first time; and the diluent is added step by step to instantaneously reduce the temperature of a reaction system to terminate the reaction, so the polyurethane prepolymer with high stability is obtained. The method provided by the invention is high in production efficiency and good in environmental protection property.

The invention relates to a distributed image high power tube core, which comprises a substrate, high electron mobility transistor (HEMT) unit cells 1a, 1b, 1c and 1d, a power distribution network, a power synthesis network and a source strip grounding radiating through hole, wherein the HEMT unit cells 1a, 1b, 1c and 1d, the power distribution network, the power synthesis network and the source strip grounding radiating through hole are all arranged on the substrate, and source electrodes of the HEMT unit cells 1a, 1b, 1c and 1d are connected with the ground through the source strip grounding radiating through hole. The HEMT unit cells 1a, 1b, 1c and 1d are distributed on the substrate evenly and are further distributed and separated by adopting the source strip grounding through hole. The HEMT unit cell source electrodes are grounded well through the source strip grounding radiating through hole, good electric performance is achieved, and the tube core is separated evenly in the longitudinal direction by using the size of a power distribution/synthesis network simultaneously, therefore even distribution of heating sources is achieved, local hot spots are avoided, radiating uniformity of the tube core is greatly improved, and stability of devices under high power is guaranteed.

The invention provides a solid-state filling adhesive with a heat conduction function. The solid-state filling adhesive is prepared from the following raw materials in parts by weight: 60-80 parts ofan epoxy resin, 20-30 parts of a modified epoxy resin, 8-10 parts of phosphorus oxychloride, 12-20 parts of modified graphene, 30-40 parts of a modified filler, 4-10 parts of a curing agent, and 3-5 parts of a dispersant, wherein the surface of the modified graphene is provided with an oxygen-containing group, the modified filler comprises graphene, aluminum oxide with a particle size of 0.1-0.5 [mu]m and silicon micro-powder, and the surface of the modified epoxy resin is modified with core-shell rubber particles with a nano structure. Compared with the prior art, the solid-state filling adhesive disclosed by the invention has the advantages that through the combined action of various substances such as the modified graphene, the phosphorus oxychloride, the modified epoxy resin, the epoxyresin and the modified filler, the solid-state filling adhesive has good heat-conducting property, and the problem that the existing solid-state filling adhesive does not have the heat-conducting property is solved.

The invention discloses a liquid cooling data center cabinet, and relates to the technical field of server hardware equipment. The cabinet comprises a square box body with an open upper end. A plurality of coamings are arranged in the square box body; an enclosing plate and the square box body jointly form at least one middle partition plate box with an opening in the upper end; a power distribution module and a network module are placed in the middle partition plate box, and a server vertically inserted into the square box body is fixedly arranged at the position, located outside the middle partition plate box, in the square box body. A stirring device is arranged in the square box body and located below the middle partition plate box, the stirring device comprises an installation plate,wherein the installation plate is provided with a stirring impeller and a receding hole used for containing the server. A liquid return pipe and a liquid supply pipe are respectively arranged on the upper side and the lower side of the stirring device on the square box body. The cabinet has the characteristics of high heat exchange coefficient and high heat exchange capability and the characteristic of uniform heat dissipation of overall parts of the server.

The invention provides a 3D printing system applicable to high-viscosity liquid chemical mixing formation. The 3D printing system applicable to high-viscosity liquid chemical mixing formation comprises a first storage tank and a second storage tank. Ultrasonic wave generating devices are arranged on the upper side of the first storage tank and the upper side of the second storage tank. An exhaustoutlet is formed in the upper ends of the first storage tank and the second storage tank. The lower side of the first storage tank is provided with a first high-viscosity liquid supply pump, the lowerside of the second storage tank is provided with a second high-viscosity liquid supply pump, and the lower ends of the first high-viscosity liquid supply pump and the second high-viscosity liquid supply pump are connected to a mixing barrel through a tee pipe. A static mixer is arranged in the mixing barrel. The lower end of the mixing barrel is provided with a printing head, and a circular air outlet is formed in the printing head. A circular air inlet is formed in the position, on the upper side of the circular air outlet, of the printing head. The lower side of the printing head is provided with a printing platform, and a printed piece is disposed on the printing platform. By means of the 3D printing system applicable to high-viscosity liquid chemical mixing formation, chemical reaction is accelerated, the appearance quality and interior structure quality of the printed piece are finally improved, at the same time, supply is more stable, vibration is small, and noise is low.