58results about How to "Play the role of heat conduction" patented technology

The invention discloses a carbon fiber-based precoated sand material for selective laser sintering and a preparation method thereof. The carbon fiber-based precoated sand material comprises chopped carbon fibers, crude sand, an organic binder, a curing agent, a lubricant, a coupling agent and a dispersant. The preparation method comprises the following steps of carrying out surface modification treatment on the chopped carbon fibers, heating the crude sand, adding resin, adding a part of calcium stearate and a prepared coupling agent aqueous solution, adding a chopped fiber-containing urotropine curing agent, adding the rest of the calcium stearate, carrying out cooling and carrying out screening and sand discharge to obtain the product. The carbon fiber-based precoated sand material has the advantages that 1, the carbon fibers have thermal conduction effects, limit integral shrinkage of a sintered part to a certain degree and reduce warp phenomenon in molding, and 2, through laser sintering, the precoated sand substantially improves resin precoated sand thermostability, promotes curing reaction of phenolic resin at locals in the sintered layer and between the sintered layers and obviously improves laser sintering forming part blank strength.

The invention discloses a flame-retardant and fire-proof power cable in the technical field of power cables. The flame-retardant and fire-proof power cable includes an outer sheath, the inner wall ofthe outer sheath is provided with a flame retardant bag tape, the inner wall of the flame retardant bag tape is provided with an armor layer, the inner wall of the armor layer is provided with a sandwich fireproof layer, the inner wall of the sandwich fireproof layer is provided with an outer metal shielding layer, the inner wall of the outer metal shielding layer is uniformly provided with conductor protective sleeves, a conductor is arranged in the inner cavity of each conductor protective sleeve, reinforcing ribs are arranged between the two adjacent groups of the conductor protective sleeves, the gap between the outer metal shielding layer and the reinforcing ribs is filled with rubber balls. The flame retardant filler in the rubber bulges can effectively prevent the external fire, andthe sandwich fireproof layer can effectively play the role of flame retardance; the mica tape has the high temperature resistance, and can better protect the cable from damage in a short period of time, to provide longer rescue time for the construction personnel.

The invention relates to a graphite heat radiator, which consists of a graphite sheet, a metal base, a heat pipe, an upper metal cover and a fan. The graphite heat radiator is characterized in that a metal connecting piece is also arranged in the graphite heat radiator, wherein the metal connecting piece not only is fixedly connected with the graphite sheet, but also is fixedly connected with the metal base or is fixedly connected with the metal base through the heat pipe. The metal connecting piece with good heat-conducting property arranged in the graphite heat radiator not only fixedly connects the graphite sheet to the heat pipe or fixedly connects the graphite sheet to the metal base, but also plays a role in heat conduction. The structure design of the graphite heat radiator can be conveniently changed only by changing the shape design of the metal connecting piece of the graphite heat radiator so that the graphite heat radiator can adapt to various heat source environments. The graphite heat radiator has the advantages of simple structure, convenient and easy operation and good radiating effect, and can be widely applied to radiating systems of electronic components.

The invention discloses a GaN-based power device with an inverted structure having a graphene heat dissipation layer and a preparation method of the GaN-based power device. The GaN-based power devicecomprises, distributed from bottom to top, a substrate, an insulating medium layer, an electrode bonding pad, a GaN-based HEMT device and graphene material, wherein the electrode bonding pad comprisesa source electrode bonding pad, a drain electrode bonding pad and a gate electrode bonding pad; the GaN-based HEMT device comprises an epitaxial layer structure, a gate electrode, a source electrodeand a drain electrode; and an electrode of the GaN-based HEMT device is bonded with the substrate through the electrode bonding pad, so that an inverted packaging structure is realized. The graphene material is adopted as a heat dissipation material on a substrate material of the inverted GaN-based HEMT device. The HEMT device is connected with the heat dissipation film through the electrode bonding pad, and graphene is adopted as a heat dissipation layer on the HEMT substrate in the inverted structure. The heat dissipation efficiency of the device is improved, and the long-term reliability ofthe device is ensured.

The invention discloses a steel-aluminum joint welding device. The steel-aluminum joint welding device comprises a protective base, a heating base, conveying rollers, mounting grooves and a shell. The shell is internally provided with the mounting grooves. A feed port is arranged on one side of the sell at the mounting grooves. According to the steel-aluminum joint welding device, a thin copper plate is arranged between a steel plate and an aluminum alloy plate; the aluminum alloy plate and the steel plate make contact with a material guide tube through the thin copper plate; on the one hand, the steel plate and the thin copper plate are isolated through limiting of the thin copper plate, and the situation that the steel plate and the aluminum alloy plate make contact with each other and have a reaction in the heating process and the welding quality is affected by brittle compounds generated from the reaction is avoided; and on the other hand, the thin copper plate achieves the heat conduction effect and conducts heat generated from a heating barrel to the welding ends of the aluminum alloy plate and the steel plate through a delivery tube, a material guide tube and the thin copper plate in sequence to achieve the preheating effect on the steel plate and the aluminum alloy plate. The influence of bubbles generated from uneven heating in the welding process on the welding quality is reduced.

The invention discloses an efficient surface-mounted triode with a good heat dissipation structure and belongs to the technical field of surface-mounted triodes. The efficient surface-mounted triode comprises a packaging outer shell, a wear-resistant anti-cracking assembly and a heat dissipation assembly; pins are installed at the lower portion of the packaging outer shell; a sealing waterproof assembly is fixed to the outer sides of the joints of the pins and the packaging outer shell; the wear-resistant anti-cracking assembly is fixed to the outer side of the packaging outer shell; a fixingplate is integrally connected to the upper portion of the packaging outer shell; a threaded hole is formed in the middle of the fixing plate; a main body chip is installed in the middle of the interior of the packaging outer shell; a reinforced protection assembly is installed on the outer side of the main body chip; conductive layers are welded to the joints of the main body chip and the pins; and insulating layers are fixed to the upper side and the lower side of the main body chip respectively. According to the efficient surface-mounted triode of the invention, the sealing waterproof assembly is adopted, the connecting positions of the pins and the packaging outer shell can be conveniently prevented from being affected with damp and aged; and the heat dissipation assembly is adopted, sothat the efficient heat dissipation of the surface-mounted triode is facilitated.

The invention discloses a nitride-based power device with a carbon nanotube micro channel radiator and a preparation method of the power device. The device comprises a substrate, an insulating dielectric layer, electrode pads, a GaN-based HEMT device and a CNT micro channel radiator distributed from bottom to top; the electrode pads include a source electrode pad, a drain electrode pad and a gateelectrode pad; the GaN-based HEMT device comprises an epitaxial layer structure, a gate electrode, a source electrode and a drain electrode; the electrodes of the GaN-based HEMT device are aligned, the electrode pads are bonded and connected with the substrate, and an upside-down packaging structure is realized; and the CNT micro channel radiator used on the substrate material of the upside-down GaN-based HEMT device and serves as a radiating channel between the outside and the device surface. A self-heating effect of the GaN-based HEMT device is reduced, the thermal resistance of the device is reduced, and the thermal reliability of the GaN-based HEMT device under strong electric field, high temperature and large power are improved.

The invention discloses a cable conveying device facilitating reeling. Conveying directions of a plurality of conveying assemblies are alternate positively and reversely, heating plates are arranged above the conveying assemblies separately, and a steam generation mechanism is arranged on the bottom of a box; a cable inlet is formed in the upper portion of a first side wall of the box, and a cableoutlet is formed in the lower portion of a second side wall of the box; a switching through hole is formed in the end, which corresponds to an exiting end of the corresponding conveying assembly, ofthe first heating plate below each conveying assembly; a guiding block is arranged on the side, which is close to the inner wall of the box, of each switching through hole; a recessed arc-shaped groove is formed in the side, which faces the corresponding conveying assembly, of each guiding block; after being discharged from the cable outlet, a cable penetrates through the other end of a drying boxfrom one end of the drying box so that the cable can be dried, the bottom of the drying box is provided with a plurality of self-locking wheels and through holes, the self-locking wheels are placed on a water collecting trough, and water draining holes are formed in the bottoms of side walls of the water collecting trough. The conveying device can preheat the cable before reeling of the cable, and thus, the reeling effect is improved.

The invention discloses a wavelength conversion device, a light-emitting device and a laser illuminating lamp. The wavelength conversion device comprises a first reflecting substrate, a second reflecting substrate and a fluorescent layer arranged in the first reflecting substrate, wherein the first reflecting substrate and the second reflecting substrate are sequentially arranged from top to bottom, the first reflecting substrate is provided with a through hole matched with the fluorescent layer, the fluorescent layer is limited in the through hole, and the lower surface of the fluorescent layer is in contact with the upper surface of the second reflecting substrate. By forming the through hole matched with the fluorescent layer in the first reflecting substrate, the effect of positioning and limiting the fluorescent layer is played, the side wall of the through hole can reflect light emitted from the side face of the fluorescent layer back to the fluorescent layer, and formation of non-designated-direction stray light is avoided. The second reflecting substrate is arranged below the first reflecting substrate, the lower surface of the fluorescent layer is in contact with the upper surface of the second reflecting substrate, laser beams are prevented from being emitted from the lower portion of the fluorescent layer, meanwhile a heat conducting effect is played, and heat produced in the fluorescent layer is rapidly conducted out.

A low-smoke flame-retardant cable for urban rail transit is disclosed, including a cable shell, anti-slip strips are fixedly installed on the outer surface of the cable shell near the two ends, and the outer surface of the cable shell is longitudinally provided with a heat conduction groove, the outer surface of the cable shell is provided with a binding groove close to the middle position, The outer surface of the binding groove is sleeved by a buffer pad, a plurality of groups of clamping blocks are fixedly installed inside the cable shell, glass fiber filling cores are embedded in the innersurfaces of the clamping blocks, a cable core is arranged in an upper side position close to the glass fiber filling cores inside the cable shell, and an inner insulation sleeve sleeves the outer surface of the cable core. The low-smoke flame-retardant cable for urban rail transit is provided with the heat conduction groove, the binding groove and a shielding ring, which can play a heat conduction role on the cable, facilitate the binding of the cable, greatly improve the flame retardancy of the cable and bring better use prospects.

The invention discloses a novel horizontal directional drilling crossing percussive rotary drilling method, and belongs to the technical field of oil and gas pipeline horizontal directional drilling crossing and oil gas drilling and production. According to the novel horizontal directional drilling crossing percussive rotary drilling method, a loose stratum area can be determined after explorationand analysis of a crossing terrain, an existing drill rod is equipped with a corresponding number of retractable setting rods, after drilling to the loose stratum area, the retractable setting rods go deep into an upper terrain and trigger and unfold setting action by launching the retractable setting rods vertically upward, a plurality of setting triggering hands extend from the retractable setting rods to the surrounding area, the gripping force of the terrain is improved, effective connection of upper and lower areas of the loose stratum is realized, the stability of drill hole walls is improved, the risk of hole collapse is obviously reduced, the terrain strength near a pipeline is improved when the pipeline is reamed and dragged back, the risk of pipeline settlement is reduced, and the safety and stability of construction are greatly improved.

The invention discloses a carbon fiber-based coated sand material for selective laser sintering and a preparation method thereof; the components of the carbon fiber-based coated sand material are chopped carbon fiber, raw sand, an organic binder, a curing agent, a lubricant, an even Coupling agent and dispersant; its preparation method is: carry out surface modification treatment on chopped carbon fiber, and then prepare according to the following process: raw sand heating—adding resin—adding part of calcium stearate and the prepared coupling agent aqueous solution—adding Hexatropine curing agent containing chopped fibers—adding the remaining calcium stearate—cooling—sieving and sanding out to obtain the product. The advantages of the present invention are: (1) carbon fiber plays a role of heat conduction, which limits the overall shrinkage of the sintered part to a certain extent, and reduces the warping phenomenon in the molding process; The thermal stability of the coated sand can promote the curing reaction of the phenolic resin in the local part of the sintered layer and the joint between the layers, and obviously improve the green strength of the laser sintered formed part.

The invention discloses an IoT (Internet of Things) gateway structure, comprising an IoT gateway body, a USB interface, a convex heat dissipation hole and a gateway base, wherein one end of the IoT gateway body is provided with a digital interface, one side of the digital interface is provided with a signal light, the other end of the IoT gateway body is provided with a power interface, one side of the power interface is installed with a USB interface through a fixing seat, the USB interface is electrically connected to the IoT gateway body, the top of the IoT gateway body is provided with theconvex heat dissipation hole, a dust filter is arranged in the convex heat dissipation hole, and one end of the dust filter is installed with a copper wire by the screw. The IoT gateway structure haspowerful functions, scientific design, convenient operation, good stability and high reliability, and is suitable for widespread promotion.

The invention discloses a panoramic camera module, comprising a first lens group and a second lens group arranged in opposite directions, wherein the first lens group comprises a first fish-eye lens and a first photosensitive plate, wherein a first photosensitive chip is arranged on a side of the first photosensitive plate facing the first fish-eye lens; the second lens group comprises a second fisheye lens, a second photosensitive plate, and a second photosensitive chip arranged on the side of the second photosensitive plate facing the second fisheye lens. The panoramic camera module furthercomprises a heat dissipation bracket fixedly arranged between the first lens group and the second lens group, wherein the heat dissipation bracket comprises a support bracket main body and heat dissipation fins arranged on both sides of the support bracket main body, and the heat dissipation fins are provided with a plurality of grooves arranged at intervals. A perfect heat dissipation system is formed by using a special structure of heat dissipation bracket, fans, conductive silica gel, conductive cloth and other devices, which can effectively reduce the working temperature of the panoramic camera module.

The invention discloses a high-efficiency patch triode with a good heat dissipation structure, relates to the technical field of patch triodes, and includes a packaging shell, a wear-resistant and crack-proof component and a heat dissipation component. Pins are installed under the package shell. And the outer side of the connection between the pin and the package shell is fixed with a sealing and waterproof component, the wear-resistant and crack-proof component is fixed on the outside of the package shell, the upper part of the package shell is integrally connected with a fixing plate, and the fixing plate A threaded hole is provided in the middle, a main chip is installed in the middle of the package shell, and a reinforced protective component is installed on the outside of the main chip, a conductive layer is welded at the connection between the main chip and the pin, and the upper and lower sides of the main chip Insulation is fixed on both sides. The beneficial effect of the present invention is that: the device facilitates the prevention of moisture aging at the connection position between the pin and the package shell through the arrangement of the sealed waterproof component, and facilitates the efficient heat dissipation of the chip transistor through the arrangement of the heat dissipation component.

The invention discloses a glass ware cleaning system for microbiological detection. The cleaning system involves a cleaning device, a drying device, a cooling mechanism and a conveying mechanism, wherein the cleaning device, the drying device and the cooling mechanism are sequentially arranged from left to right, and the conveying mechanism is located behind the cleaning device, the drying deviceand the cooling mechanism. The steps such as washing, drying, and cooling of a glass ware can be achieved through the cleaning device, the drying device and the cooling mechanism, the glass ware is conveyed by the conveying device, the automation degree is high, and the labor intensity is reduced; and meanwhile, the manual intervention in the washing process is reduced, the glass ware is preventedfrom being polluted in the cleaning process, and the reliability of experimental data is increased.

The invention discloses a plasma oxidized metal aluminum fiber reinforced friction material and a preparation method thereof. The material comprises a friction material and plasma oxidized metal aluminum fibers, wherein 300g of the plasma oxidized metal aluminum fibers are added into each cubic decimeter of the friction material. The preparation method of the material includes: preparing an electrolytic solution, performing plasma electrolytic oxidation on the surfaces of aluminum fibers, and preparing the aluminum fiber reinforced friction material. Compared with the prior art, the plasma oxidized metal aluminum fiber reinforced friction material has the advantages that the plasma oxidized metal aluminum fiber reinforced friction material not only has good wear resistance, but also has good heat resistance in a friction process; meanwhile, contradiction between thermal decay inhibition and noise generation in a traditional formula is overcome. The preparation method is simple to operate and convenient to achieve large-batch production.

The invention discloses a detector adopting an acoustic resonator and a carbon nanotube and a manufacturing method thereof. The detector comprises the acoustic resonator. The acoustic resonator comprises a substrate. One side of the acoustic resonator, which is far away from the substrate, is provided with the carbon nanotube. The manufacturing method is characterized by growing the carbon nanotube on the side of the acoustic resonator which is far away from the substrate. The detector has advantages that the response time of the detector is short; sensitivity is high; a work frequency is high; and the detector has an application prospect in a wireless communication field.

The invention relates to an auxiliary heat transfer mechanism, an outboard load and a space station. The auxiliary heat transfer mechanism is used for conducting heat of an outboard load radiating surface to a space station bulkhead cold plate, and comprises a heat conduction assembly and an electric pushing mechanism. The hot end of the heat conduction assembly is connected with an outboard loadradiating surface. The cold end of the heat conduction assembly is located on the free side of the electric pushing mechanism. Under the pushing of the electric pushing mechanism, the heat conductionassembly moves towards the space station bulkhead cold plate. After the electric pushing mechanism is powered on, the cold end of the heat conduction assembly is pushed to move towards the space station bulkhead cold plate; when the cold end of the heat conduction assembly abuts against the cold plate, the hot end of the heat conduction assembly is connected with the outboard load radiating surface such that the heat of the outboard load radiating surface can be conducted to the cold end of the heat conduction assembly through the hot end of the heat conduction assembly and then conducted to the space station bulkhead cold plate, therefore heat dissipation of the outboard load is achieved, unmanned outboard operation is achieved through the electric pushing mechanism, and heat dissipationof the outboard load is achieved only through electric signals.

A hot pressing plate for a non-woven fabric hot pressing device includes a heating layer, a buffer layer, a hot pressing layer and a hot air blower. The heating layer is disposed on the top of the buffer layer. The hot pressing layer is disposed on the bottom of the buffer layer, and one end of the heating layer is provided with the hot air blower. The beneficial effects are as follows: (1) the buffer layer can effectively prevent the hot pressing layer from deforming by long-term direct heating, and can also play a buffering effect, thereby avoiding the impact of the hot pressing plate on a to-be -pressed object placing plate; 2) a recovery pipe arranged in the hot pressing plate can recover hot air discharged from a heat circulation pipe to save the cost, and the hot pressing plate is more environmentally friendly; and (3) a graphene coating layer coating a reset spring can better serve a heat-conducting effect.

The invention discloses an electronic stop board adopting graphene for heat dissipation. The stop board comprises a base, a stop board main body is fixedly connected to the top of the base, a displayscreen body is embedded in the front surface of the stop board main body, a loudspeaker is embedded in the top of the front surface of the stop board main body, a cavity is formed in the stop board main body, and four first mounting inner studs are fixedly connected to the front side of an inner cavity of the cavity. The electronic stop board solves the problem that a display on an electronic stop board is provided with a main board, a chip on the main board is used for main information processing, and during main board working, the chip can generate a large amount of heat, however, the purpose of heat dissipation of the chip on the main board is achieved in the mode that an aluminum sheet conducts heat, and the heat dissipation effect is poor, although a filter screen is arranged at theposition used for air inlet and air outlet, filter holes in the filter screen can be blocked due to too much external dust after long-time use, and heat dissipation of the chip on the main board is seriously affected.

The invention relates to the technical field of tempered glass, in particular to explosion-proof tempered glass and a processing technology thereof. The explosion-proof tempered glass comprises two pieces of tempered glass, two groups of explosion-proof film layers, a fixing mechanism and a damping mechanism, the two pieces of tempered glass are oppositely arranged, clamping grooves are formed in the two pieces of tempered glass respectively, the two groups of explosion-proof film layers are arranged on one sides of the two pieces of tempered glass respectively, and the two groups of explosion-proof film layers are arranged on the other sides of the two pieces of tempered glass respectively. The fixing mechanism is arranged on the two pieces of tempered glass, the number of the damping mechanisms is two, the two damping mechanisms are oppositely arranged on the two sides of the two pieces of tempered glass respectively, and the explosion-proof film layer comprises an adhesive tape layer, a conductive silica gel layer, a heat conduction silica gel layer, an explosion-proof layer and a waterproof layer. And the use is safer.

The invention relates to an auxiliary heat transfer mechanism, an external load and a space station, which is used for conducting the heat of the heat dissipation surface of the external load to the cold plate of the bulkhead of the space station, including a heat conduction component and an electric driving mechanism, and the hot end of the heat conduction component is used to communicate with the space station The heat dissipation surface of the external load is connected. The cold end of the heat conduction component is located on the free side of the electric propulsion mechanism, and is driven by the electric propulsion mechanism to move towards the cold plate of the bulkhead of the space station. After the electric propulsion mechanism is powered on, the cold end of the heat conduction component is pushed towards the space station. When the cold plate of the bulkhead moves, when the cold end of the heat conduction component touches the cold plate, since the hot end of the heat conduction component is connected to the heat dissipation surface of the external load, the heat of the heat dissipation surface of the external load can be conducted to the heat conduction surface through the hot end of the heat conduction component. The cold end of the component is then transmitted to the cold plate of the bulkhead of the space station to realize the heat dissipation of the external load. The electric propulsion mechanism is used to realize unmanned external operation, and the heat dissipation of the external load is realized only by electrical signals.

The invention discloses a signal laser transmitter of an unmanned aerial vehicle. The invention relates to the technical field of laser transmitters. According to the technical scheme, the signal laser transmitter is characterized by comprising an overturning end; a transmitting end shell is arranged at the rear end of the overturning end; a power supply end shell is arranged at the rear end of the transmitting end shell; a fixed frame is arranged above the fixed plate; the front end of the fixed frame is connected with a clamping end plate; and side fixing groove plates are arranged at the left end and the right end of the clamping end plate correspondingly. Expansion slots are formed in the left side and the right side of the fixed frame; the expansion slots are formed in the fixed frame, a communication structure is formed between the expansion slots and the fixed frame, a contact block is fixed to the inner side face of the fixed frame, the contact block is connected with the fixedframe in a welded mode, and an attaching rubber pad is arranged on the upper surface of the contact block and embedded in the upper surface of the contact block. The structure can reduce resistance formed by the extra size in the moving process of the unmanned aerial vehicle; meanwhile, air filling ventilation is conducted on the internal structure, and the temperature of the heating assembly isfurther reduced.

The invention discloses an SSD stacked packaging structure and a preparation method thereof. The SSD stacked packaging structure is characterized by comprising a substrate; a control chip which is surface-mounted on the substrate and electrically connected with the substrate; a spacer of which the lower surface is provided with an accommodating space, wherein the spacer is surface-mounted on the substrate, and the control chip is arranged in the accommodating space; a memory chip which is surface-mounted on the upper surface of the spacer and electrically connected with the substrate through abonding wire; and a plastic packaging body which covers the substrate, the spacer, the memory chip and the bonding wire. According to the packaging structure, the control chip is protected from cracking through the U-shaped Spacer, and the packaging structure is small in size and easy to implement and improves the packaging quality.

The invention discloses a GaN-based power device with an inverted structure having a graphene heat dissipation layer and a preparation method of the GaN-based power device. The GaN-based power devicecomprises, distributed from bottom to top, a substrate, an insulating medium layer, an electrode bonding pad, a GaN-based HEMT device and graphene material, wherein the electrode bonding pad comprisesa source electrode bonding pad, a drain electrode bonding pad and a gate electrode bonding pad; the GaN-based HEMT device comprises an epitaxial layer structure, a gate electrode, a source electrodeand a drain electrode; and an electrode of the GaN-based HEMT device is bonded with the substrate through the electrode bonding pad, so that an inverted packaging structure is realized. The graphene material is adopted as a heat dissipation material on a substrate material of the inverted GaN-based HEMT device. The HEMT device is connected with the heat dissipation film through the electrode bonding pad, and graphene is adopted as a heat dissipation layer on the HEMT substrate in the inverted structure. The heat dissipation efficiency of the device is improved, and the long-term reliability ofthe device is ensured.

The invention relates to a graphite heat radiator, which consists of a graphite sheet, a metal base, a heat pipe, an upper metal cover and a fan. The graphite heat radiator is characterized in that a metal connecting piece is also arranged in the graphite heat radiator, wherein the metal connecting piece not only is fixedly connected with the graphite sheet, but also is fixedly connected with the metal base or is fixedly connected with the metal base through the heat pipe. The metal connecting piece with good heat-conducting property arranged in the graphite heat radiator not only fixedly connects the graphite sheet to the heat pipe or fixedly connects the graphite sheet to the metal base, but also plays a role in heat conduction. The structure design of the graphite heat radiator can be conveniently changed only by changing the shape design of the metal connecting piece of the graphite heat radiator so that the graphite heat radiator can adapt to various heat source environments. The graphite heat radiator has the advantages of simple structure, convenient and easy operation and good radiating effect, and can be widely applied to radiating systems of electronic components.

The invention belongs to the technical field of building materials, and more particularly relates to a novel color steel press plate with a function of cooling. The novel color steel press plate comprises an inner press plate body and an outer press plate body, wherein a filling layer is arranged between the inner press plate body and the outer press plate body, the lower surface of the inner press plate body is provided with a second protrusion, the upper surface of the outer press plate body is provided with a first protrusion, the upper surface and the lower surface of the filling layer arerespectively provided with protrusions matched with the protrusions on the inner press plate body and the outer press plate body, a conical hole is formed in the interior of the filling layer, and the diameter hole of the large end of the conical hole is connected to the outer press plate body.

The invention discloses a device for eliminating welding cracks and pores of aluminum-steel dissimilar metal. The device comprises a casing, a welding chamber, a far-infrared heater, a water storage chamber and a protective seat, wherein the water storage chamber is arranged at the inner bottom end of the casing; the casing above the water storage chamber is internally provided with the welding chamber. According to the device disclosed by the invention, a copper sheet is arranged between a steel plate and an aluminum alloy plate; the aluminum alloy plate and the steel plate are respectively contacted with a material guiding pipe by using the copper sheet; on the one hand, the condition that the steel plate and the aluminum alloy plate are contacted and react to generate a brittle compound in the heating process is avoided by use of the limiting action of the copper sheet; on the other hand, the copper sheet realizes a heat conduction effect, and conducts the heat produced by a heating barrel to welding ends of the aluminum alloy plate and the steel plate separately for preheating the steel plate and the aluminum alloy plate, so that the phenomenon that the welding quality is affected as bubbles are produced because of nonuniform heating in the welding process is reduced; a weld seam is integrally welded after the copper sheet is heated and melted so as to improve the welding effect.

The invention belongs to the technical field of refrigeration product production technology, and especially relates to a production method of an electronic thermoelectric cooler. The production methodof the electronic thermoelectric cooler comprises the following steps: S100: providing an aluminum substrate and manufacturing an alumina insulating layer on the surface of the aluminum substrate; S200: manufacturing a line layer on the alumina insulating layer; and S300: welding a plurality of refrigeration crystals on the line layer. Firstly, the alumina insulating layer is manufactured on thesurface of the aluminum substrate; then, the line lay is manufactured on the alumina insulating lay; and finally, the several refrigeration crystals are welded on the line layer. Due to the arrangement of the alumina insulating layer, the heat conduction effect can be achieved through the alumina insulating layer; and since there is almost no gap between the alumina insulating layer and the aluminum substrate and the alumina insulating layer has a higher thermal conductivity than a traditional insulating adhesive, the thermal conduction property of the aluminum substrate can be greatly improved, and the refrigeration efficiency and power density of the whole electronic thermoelectric cooler can be further improved.