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.

Embodiments of the invention provide a chip packaging structure. The chip packaging structure comprises a substrate, a plurality of chips and a plurality of separation devices which are packaged on the upper surface of the substrate, and a heat dissipation apparatus, wherein the heat dissipation apparatus comprises an insulating layer and a heat conduction layer which are arranged in a laminating manner; and the insulating layer fully coats and is attached to the outer surfaces of the multiple chips and separation devices and the upper surface of the substrate, and is used for transferring heat generated by the multiple chips and separation devices to the heat conduction layer and the substrate, so as to dissipate the heat generated by the multiple chips and separation devices through the heat conduction layer and the substrate. In addition, the embodiments of the invention also provide a manufacturing method for the chip packaging structure. The chip packaging structure, by setting the heat dissipation apparatus, can realize uniform and efficient system-level chip packaging heat dissipation.

The present invention is growth method of scintillating cerium doped lutetium disilicate monocrystal. The monocrystal has structure expression of (CexReyLu1-x-y)2Si2O7, where Re is one or several of Sc, Er, La, Ho, Dy, Yb, Y, Gd, etc.; x is 0.001-0.05 and y is 0-0.2. The growth method features that in the LPS crystal seed direction parallel to the complete cleavage plane (110) and in angle not greater than 25 deg with the incomplete cleavage plane (001), the crystal is grown in relatively low pulling speed of 0.5-1.5 mm / hr, and special tailing program is adopted to make the crystal tail basically in the symmetrical shape with the shoulder. The present invention can solve the problem of cleavage bursting of the (CexReyLu1-x-y)2Si2O7 crystal, and has high crystal quality and relatively large crystal size.

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 discloses a power battery module based on coupling cooling of a loop heat pipe and a phase change material. The power battery module comprises a battery module, a cooling system and a phase change system, wherein the battery module comprises a plurality of battery cells arranged side by side left and right. The cooling system comprises evaporation plates and a condenser. A number ofevaporation plates are correspondingly arranged between the adjacent battery cells. The phase change system comprises a plurality of solid-solid phase change plates, and the solid-solid phase change plates are correspondingly arranged between the evaporation plates and the battery cells. The upper end of each evaporation plate is firstly communicated with a condensation cavity in a condenser abovethe battery box body through an air guide pipe, and then is communicated with the lower end of the evaporation plate through a liquid guide pipe on the side edge of the condensation cavity to form acirculation loop. The power battery module based on coupling cooling of the loop heat pipe and the phase change material is simple and compact in structure. Efficient and uniform heat dissipation of the battery module is achieved through mutual combination of the loop and the phase change material. Cyclic utilization of an evaporation working medium is achieved, and energy consumption is reduced.

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 relates to an LED bulb. An inflatable LED bulb comprises a bulb housing, a core column, an LED, a lamp holder and an LED driver, wherein the bulb housing and the core column are enclosed to form a gas storage chamber, and the core column is provided with an inflation channel communicated with the gas storage chamber, a bulkhead provided with an on-position jack, a first spring driving the bulkhead to seal the inflation channel, a latch inserted in the on-position jack, a floating chamber and a floating plug which is moved based on the pressure of the gas stored in the gas storage chamber and drives the latch to be pulled out of the on-position jack. The floating plug is in sealing and sliding connection in the floating chamber, the floating plug divides the floating chamber into a sealing chamber and an opening chamber communicated with the gas storage chamber, and the opening chamber is positioned on the side of the floating plug facing the latch. The inflatable LED bulb has the advantages of less heat transmitted from an LED to the core column, uniform heat radiation, and automatic disconnection when the internal air pressure reaches a set value, and solves the problem that a conventional LED is poor in heat radiation uniformity and radiated heat influences the stability of an LED driver.

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.

An nLDMOS (Laterally Diffused Metal Oxide Semiconductor) device with an ESD (electronic static discharge) protection function belongs to the field of electronic technique. A P trap and an N trap for manufacturing a low-voltage device are introduced between the drift region and the drain electrode contact region of a conventional nLDMOS device, and the ESD current is enabled to flow through the deeper region of the device, so that the peak power density under ESD stress is reduced, the current is prevented from centralizing in the surface of the device, the uniformity on heat dissipation of the device is improved on the basis of greatly improving the reliability of the beak position of a drain terminal, and the ESD protection capacity of the device is accordingly improved. The nLDMOS device with the ESD protection function is compliable with the techniques of Bipolar CMOS (Complementary Metal-Oxide-Semiconductor Transistor) and DMOS (Double Diffusion Metal-Oxide-Semiconductor), and the cost of the device is not remarkably increased.

The invention discloses an explosive-proof electric motor equipped with a transitional connecting plate. The explosive-proof electric motor comprises the electric motor and the transitional connecting plate, wherein the transitional connecting plate is fixedly connected at the front end of the electric motor; the transitional connecting plate comprises a transitional plate and a connecting plate; the transitional plate comprises an electric motor front cover connecting ring, a transitional connecting ring I and a plurality of connecting rib plates I in an axial interval arrangement manner, wherein the connecting rib plates I are connected with the electric motor front cover connecting ring and the transitional connecting ring I; the outer ring diameter of the transitional connecting ring I is greater than that of the electric motor front cover connecting ring; the connecting plate comprises a transitional connecting ring II, a terminal connecting plate and a plurality of connecting rib plates II in an axial interval arrangement manner, wherein the connecting rib plates II are connected with the transitional connecting ring II and the terminal connecting plate; the outer ring diameter of the transitional connecting ring II is greater than that of the terminal connecting plate; and the transitional connecting ring II and the transitional connecting ring I are combined and fixedly connected through a seam allowance structure. According to the explosive-proof electric motor equipped with the transitional connecting plate, the front end heat dissipation condition of the electric motor can be remarkably improved.

The invention discloses an assembling method for a high-radiating lithium ion battery module. A hollow annular water tank consists of a stainless steel inner layer and a composite aluminium alloy outer layer; the volume of the stainless steel inner layer can hold a plurality of lithium ion batteries; the composite aluminium alloy outer layer is coated at the distance of 5 to 50 mm from the outer end surface of the stainless steel inner layer; the composite aluminium alloy outer layer consists of side panels and a bottom plate; each side panel and the bottom plate are extended from the centre to the two ends and are symmetrically etched with a plurality of horizontal radiating strips with different density surfaces; a water inlet pipe is assembled at the bottom end of one side panel; a water outlet pipe is assembled at the upper end of another side panel; gaps among various lithium ion batteries are filled with conductive adhesive; connecting pieces and electrode posts of various lithium ion batteries are welded in sequence to form a positive pole bus and a negative pole bus of the lithium ion battery module by adopting ultrasonic waves. The assembling method has the advantages of high cooling speed, uniform temperature, good effect, convenience and the like; the radiating effect can be improved by composite aluminium alloy; the weight is light and the strength is high; the high-radiating lithium ion battery module has high radiating performance and safety performance.

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 discloses a battery box which comprises a shell and a battery bucket, wherein the battery bucket is arranged inside the shell; a battery module is arranged inside the battery bucket; airchannels for heat radiation of a battery module is radiated are formed inside the shell; the air channels comprise multiple layers of the air channels formed in the depth direction of the battery bucket. Due to the design of the multiple layers of the air channels inside the battery box disclosed by the invention, the heat radiation effect and the heat radiation uniformity of the whole battery box are greatly improved, the working temperature of the whole battery box is controlled to be less than 55 DEG C, and safe operation of the battery box is ensured.

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 an LED radiator, belongs to the technical field of radiation and discloses a plated LED radiator. The plated LED radiator comprises a rectangular heat conducting plate and a plurality of radiating fins. A sealed cavity is formed in the heat conducting plate, a plurality of cavity bodies which are communicated with each other are formed in the cavity, a plurality of micro protrusions are arranged at the bottom of the cavity, the cavity is filled by phase change heat transfer media, the radiating fins are arranged on the heat conducting at equal intervals along the long edge of the heat conducting plate, and the heat conducting plate and the radiating fins are formed by integrally extruding aluminum alloy section bars. The cavity bodies in the cavity of the heat conducting plate are communicated with each other, so that when the phase change heat transfer media in the cavity are heated to boil, vapor can be filled into all parts of the cavity to enable temperatures of all points of a bottom plate to trend to be the same. All radiating fins can effectively work to improve radiating evenness. The hollow bottom plate reduces the weight of the plated LED radiator. Meanwhile, the plated LED radiator has no limit on installation angles.

A flat panel display is provided having enhanced thermal dissipation uniformity. The flat panel display includes an image display panel wherein a first substrate is spaced apart from a second substrate. A transparent conductive film is formed on the front side of the image display panel. A chassis member is positioned on the rear side of the image display panel. A conductive member connects the transparent conductive film and the chassis member.

The invention discloses an ESD protection circuit and an electronic device. The ESD protection circuit comprises a power supply end; a ground end; a discharge circuit which comprises a clamping transistor and an MOS transistor which are connected in series, wherein the clamping transistor and the MOS transistor are integrated on the same semiconductor substrate and are different in type, and the source electrode and the drain electrode of the clamping transistor are electrically connected with the substrate end and are connected to the power supply end; the grid electrode of the MOS transistoris electrically connected with the substrate end; the first electrode of the MOS transistor is electrically connected with the grid electrode of the clamping transistor, and the second electrode of the MOS transistor is connected with the grounding end; when ESD occurs, the MOS transistor is turned on, and parasitic current between the substrate end of the clamping transistor and the second electrode is formed. According to the scheme of the invention, the leakage current generated by the discharge path can be better prevented, and the quality of the core device is prevented from being influenced.

The invention discloses an embedded water-cooled heat sink. The embedded water-cooled heat sink comprises a base platform and a copper pipe, wherein the base platform is made of aluminum and is in a flat cuboid shape, an installation hole position is arranged on a front surface of the base platform, the copper pipe comprises a plurality of vertical pipes independent to one another and two horizontal pipes, two ends of each vertical pipe are respectively welded and fixed on side walls of the two horizontal pipes, the interiors of the vertical pipes communicate with the interiors of the horizontal pipes, a water inlet pipe and a water outlet pipe are arranged on each of the two horizontal pipes, a groove is formed in the front surface or a back surface of the base platform and is the same as the shape of the copper pipe, the copper pipe is embedded into the groove, the depth of the groove is not smaller than the thickness of the copper pipe, a heat conduction adhesive is filled between the copper pipe and the groove, and the copper pipe is fixed on the base platform by the heat conduction adhesive. The embedded water-cooled heat sink is simple in structure, is convenient to fabricate and has a good and uniform heat conduction effect, the circulation path of cooling water in the base platform is reduced, and the heat dissipation efficiency is greatly improved.

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.

The invention discloses a new energy automobile rechargeable battery cooling mechanism, comprising an outer box body and an inner box body, wherein the inner box body is arranged in the outer box body, an accommodating bin is formed between the inner box body and the outer box body, a cooling plate is placed in the accommodating bin, a plurality of heat dissipation through holes are uniformly distributed on an outer wall of the outer box body, an anti-pressure plate is fixedly mounted on the outer wall of the outer box body, a metal bottom plate is installed on the bottom of the outer box body, a heat dissipation plate is arranged below the metal bottom plate, multiple groups of buffering components are installed between the metal bottom plate and the heat dissipation plate, and an upper cover body is hinged to an upper end of the outer box body. The new energy automobile rechargeable battery cooling mechanism disclosed by the invention has a novel structural design, has excellent heatdissipation, pressure resistance and buffering performance, and effectively protects the internal rechargeable battery, thereby further prolonging the service life of the rechargeable battery.

The invention discloses an air-cooling dry type air-core reactor structure. The air-cooling dry type air-core reactor structure comprises a reactor with a cooling passageway, a ventilation pipeline communicated with the cooling passageway, and an air supply device communicated with the ventilation pipeline. The ventilation pipeline comprises a horizontal section pipeline, an arc section pipeline and a vertical section pipeline which are sequentially communicated. A first air flow passageway and a second air flow passageway are formed in the end, away from the arc section pipeline, of the vertical section pipeline. The first air flow passageway and the second air flow passageway are connected with the reactor, and then the first air flow passageway and the second air flow passageway are communicated with the cooling passageway in a butt joint mode. Meanwhile, by mean of the optimization design of the structures of a protection piece and the ventilation pipeline, air entering the cooling passageway can be uniform, and therefore the cooling efficiency and the cooling uniformity of the whole cooling passageway are improved, safety of the reactor is protected, and the service life of the reactor is prolonged.

The invention discloses a heat dissipation mechanism and an LED film and television lamp, and relates to the technical field of LEDs. The heat dissipation mechanism comprises a fixing device and a light-emitting device. The fixing device comprises a first heat dissipation part and a second heat dissipation part, a heat dissipation interval is arranged between the first heat dissipation part and the second heat dissipation part, and the first heat dissipation part is provided with a containing cavity and a heat dissipation channel penetrating through the containing cavity; a control element is arranged in the containing cavity, and the heat dissipation channel comprises a first funnel part provided with a wide opening end and a narrow opening end, a second funnel part provided with a thin opening end and a thick opening end, and an air guide part provided with a radiator. The light-emitting device comprises a light-emitting part arranged on the second heat dissipation part and a plurality of heat dissipation ridges arranged on the back face of the light-emitting part at intervals. The light-emitting part is electrically connected with the control element, each heat dissipation ridge is provided with a confluence notch, and the confluence notches are aligned with one another to form a confluence channel aligned with the heat dissipation channel; therefore, the temperature of the control panel is slightly influenced by the heat of the LED, the temperature uniformity of the light-emitting device during working is improved, the waterproof performance is improved, and the heat dissipation noise is reduced.

The invention discloses a liquid cooling plate and a power module, the liquid cooling plate comprises a heat dissipation module, the heat dissipation module comprises heat conduction fins, a heat conduction flow channel is formed between every two adjacent heat conduction fins, and the area of a heat conduction surface, directly facing a heating device, of each heat conduction flow channel is gradually increased in the flowing direction of cooling liquid. In the liquid cooling plate provided by the invention, as the area of the heat conduction surface, directly facing the heating device, of the heat conduction flow channel is gradually increased along the flowing direction of the cooling liquid, although the temperature of the cooling liquid in the heat conduction flow channel is gradually increased along the flowing direction, the heat conduction surface of the heat conduction flow channel is increased, namely, the heat exchange area is increased; and therefore, the heat dissipation uniformity of the liquid cooling plate is improved.

The invention discloses a mixed convection heat radiation type notebook computer heat radiator, which comprises front supporting legs, base plates, sealing pads, micro axial flow fans, flow guide sheets and rear supporting legs, and is characterized in that the front supporting legs and the rear supporting legs are respectively fixed on the base plates; the front supporting legs are higher than the rear supporting legs, so that the front part and the rear part of the notebook computer heat radiator have a height difference; each micro axial flow fan is arranged on one side of the back of each base plate, which is close to each rear supporting leg; the flow guide sheets are arranged on the tops of the base plates; the flow guide sheets, the base plates and the bottom of a notebook computer form a flow guide channel; and the sealing pads are arranged on the tops of the flow guide sheets. The mixed convection heat radiation type notebook computer heat radiator has the advantages of 1) simple and scientific structure, 2) high heat radiation uniformity and 3) low production cost.