93results about How to "Good heat conduction efficiency" patented technology

A slim vapor chamber includes a first plate, a second plate and a capillary structure. The periphery of the second plate is connected with that of the first plate to form a chamber. The capillary structure is disposed in the chamber. At least one of a side of the first plate facing the second plate and a side of the second plate facing the first plate is formed with a plurality of supporting structures, which include a plurality of supporting pillars and a plurality of supporting plates, by an etching process.

The invention discloses a tube fin brazing process and an in-tube heating brazing machine and is characterized in that a finned tubular pipe welding element well filled with solders is placed on a bracket and the surfaces of welding elements to be brazed are chemically cleaned; a rod type electric heating tube extends into the pipe to perform in-tube radiation heating to firstly moisten and apply the solders at the external wall of the pipe to fill the brazing gaps and then transfer the temperature to a finned folding edge by liquid solders; the metallurgical bonding is formed between the solders and the pipe as well as the folding edge by the atomic diffusion and solution. By adopting the in-tube heating brazing machine which consists of a machine stand, the bracket which is arranged at the front end of the machine stand and a heating tube holder arranged at the bracket, the tube fin brazing process and the in-tube heating brazing machine have the advantages of simple and convenient operation, minimal investment, no limitation to the geometric shapes of the brazed elements, no damage to the surfaces of the brazed elements and no change of the crystal structures in metals and solve the problems that the fins reach the brazing temperature before the pipes and the temperature is not easily controlled, and the brazing can not completely penetrate and fill the connection gaps and the brazing effect is bad, and the problems are caused by the traditional brazing heating ways.

A method for connecting a heat-dissipating body and a heat pipe and the structure thereof are used to improve the efficiency of heat conduction. The structure includes a heat-dissipating body and a heat pipe. The central position of the heat-dissipating body is provided with an accommodating trough for accommodating the heat pipe. A plurality of corresponding slots extends outwardly from the periphery of the trough. The other end of the slot is connected to a through hole. Tools are disposed in the slots to widen the slots and thus the periphery of the trough, so that the inner diameter of the trough is larger than the outer diameter of the heat pipe. After the heat pipe penetrates into the trough, the tools are removed, so that the inner wall surface of the trough abuts tightly against the outer circumferential surface of the heat pipe. Thus, the optimal efficiency of heat conduction between the heat pipe and the heat-dissipating body can be achieved.

A thermal module structure and a manufacturing method thereof. The thermal module structure includes a base and a heat pipe. The base has a first channel and a first recessed section in communication with the first channel. The heat pipe is correspondingly disposed in the first channel. According to the thermal module structure, the heat pipe can directly contact heat source and directly connect with the base without brazing. Therefore, the manufacturing cost is greatly lowered.

A making method of an artificial graphite heat radiation substrate comprises the following steps: applying a pressure of 0.1kg/cm<2> or less to a polymer sheet in inert gas environment, and gradually heating to obtain a condensed carbonization membrane; gradually heating the condensed carbonization membrane to obtain a graphite membrane composed of a plurality of layers of graphene; and stacking a plurality of the graphite membranes along a stacking direction, and carrying out compressing fixation of the graphite membranes by a predetermined pressure in the stacking direction. Compared with present making methods, the making method disclosed in the invention has the advantages of process simplification, production cost reduction and easy processing; and the artificial graphite heat radiation substrate made through the making method has a good heat conduction effect.

The flexible heat conducting and dissipating module includes one heat accepting end device, one heat dissipating end device and one flexible heat conducting device. The heat accepting end device is heat conducting tube or other heat conducting body connected between the heat source and the first pedestal; the heat dissipating end device is heat conducting tube or other heat conducting body connected between the heat dissipater and the second pedestal; and the flexible heat conducting pipe is connected between the first pedestal and the second pedestal to constitute closed loop. The flexible heat conducting pipe is filled with heat conducting liquid, and after absorbing heat in the heat accepting end, the heat conducting liquid forms heat convection inside the flexible pipe to conduct heat to the heat dissipating end. In this way, heat is transferred and dissipated via flexible path.

A heat sink has a fin set and at least one heat pipe. The fin set has multiple stacked fins and at least one tapered tube. Each fin has at least one protrusion. The at least one protrusion protrudes from each fin and each protrusion has an internal surface. The at least one tapered tube is defined through corresponding protrusions of the fins. The at least one heat pipe has at least one tapered arm and a pipe wall. The tapered arm corresponds to and is mounted through a corresponding tapered tube of the fin set. The pipe wall of the heat pipe abuts the internal surfaces of corresponding protrusions of the fins tightly so heat can be dissipated efficiently during use.

The invention relates to a friction-spun phase-change antistatic composite yarn and a preparation method thereof. The method comprises the following steps of 1, sequentially impregnating a polyester yarn in a mixture of polyethylene glycol (PEG) and carbon nanotubes, and a polyvinyl butyral (PVB) solution to obtain a polyester-PEG-carbon nanotube-PVB composite yarn; and 2, taking the polyester-PEG-carbon nanotube-PVB composite yarn as a core yarn and common synthetic fibers as wrapping fibers, and performing friction spinning to prepare the polyester-PEG-carbon nanotube-PVB-synthetic fiber composite yarn. The composite yarn has the advantages that 1, the composite yarn is high in phase change enthalpy value, good in heat storage effect, high in heat transfer efficiency and good in antistatic property; 2, the preparation method is simple, economical and rapid; 3, the service life is long, and the thermal cycle performance is stable; 4, the phase change temperature is adjustable; and 5,the raw material applicability is good, and the problem that a core yarn is difficult to prepare by ring spinning after non-uniform PEG sizing can be solved.

In a heat conducting assembly for a water heater and a method for making the heat conducting assembly, there is provided a heat-conductive housing which has inner wall surfaces that cooperate to confine a sealed chamber. A heat-conductive unit is disposed in the sealed chamber. Heat-conductive particles are disposed in the sealed chamber, and are caused to accumulate on the inner wall surfaces of the heat-conductive housing and outer wall surfaces of the heat-conductive unit for heating water in the heat-conductive unit.

A thermally conductive resin composition containing (A1) a fluorine-based compound having one to two terminal SiH group(s), in which a content of molecules having two such groups is 60 to 100 mole %, (B1) a fluorine-based compound having one to two terminal alkenyl group(s), in which a content of molecules having two such groups is 60 to 100 mole %, (A2) a fluorine-based compound in which a content of molecules having two terminal SiH groups is 0 to 40 mole %, (B2) a fluorine-based compound in which a content of molecules having two terminal alkenyl groups is 0 to 40 mole %, and (C) a thermally conductive filler, and satisfying, in connection with the content of the fluorine-based compounds, relation of [(A1)+(B1)]/[(A2)+(B2)]=20/80 to 80/20 and (A1)/(B1) and (A2)/(B2)=20/80 to 80/20, as well as a thermally conductive sheet including the same are provided.

The invention discloses a drying machine for wood chips. The drying machine comprises a conveyor belt, a dynamic chain, N heating rollers arranged at intervals sequentially and a heat circulating device providing heat carriers to the heating rollers; each heating roller is provided with one roller, a first driving shaft is arranged above the first heating roller, a second driving shaft is arranged above the Nth heating roller, and each of the first driving shaft and the second driving shaft is connected with a driving motor; one end of the dynamic chain is mounted on the first driving shaft while the other end winds the rollers sequentially and the second driving shaft to return to the first driving shaft, and the conveyor belt is mounted between a feed inlet and a discharge outlet and is arranged on outer side walls of the heating rollers through positioning roll shafts sequentially, wherein N is a positive integer greater than or equal to 3. Compared with the prior art, the drying machine has the advantages of simple structure, low energy consumption, rapid drying and high drying efficiency.

An exemplary method for manufacturing a heat dissipation apparatus includes, firstly, providing a fin assembly including a stack of fins spaced from each other. Each fin defines a through hole therein, and includes a collar formed at an edge of the through hole. Then a heat pipe is provided, and inserted in the through holes of the fins. Next, two opposing punching tools are provided. Each punching tool defines a series of recesses. The subassembly of the heat pipe and fins is positioned between the two punching tools, with the collar of each fin located between two corresponding recesses of the two punching tools. The two punching tools punch the collars of the fins from two opposite sides of the collars. Thereby, the collars shrink inwardly and press the heat pipe to deform until the heat pipe is fittedly mounted in the collars of the fins.

The invention discloses a processing method of graphite heat conducting fins, using a group of male dies and female dies to clamp and press the graphite conduction plate to become the graphite heat conducting fins with specific contour exterior, and using holderups arranged between the male dies and the females dies, controlled to continue to press a first thickness to a scheduled second thickness of the graphite heat conducting fins, thereby advancing density of the graphite and improving conduction efficiency. Furthermore, the bent graphite heat conducting fins are extruded, to reinforce the problems of hard conduction at the loose bending. In addition, after the heat conducting fins are tabled on the surfaces of the graphite heat conducting fins, the graphite heat conducting fins are extruded again, causing the conducting fins more fixedly connected with the surfaces of the graphite heat conducting fins.

Thermal electricity conversion based on the heat extracted from underground coal fires, comprising a coalfield fire area (1), coalfield drill holes (2), underground heat conduction pipelines (3) and a heat conduction container (4) which is provided with a pressure relief device (5) thereon and further comprises thermoelectric power generation chip sets (6) and a storage battery (7), wherein the thermoelectric power generation chip sets (6), having cold-side radiator pipes (8) provided on outer sides thereof, are provided on an outer side wall of the heat conduction container (4). The thermoelectric power generation chip sets in the invention are directly attached on the heat conduction container, so that the system is simple in structure without redundant components and high in heat conduction efficiency. The thermoelectric power generation chip sets, having the cold side radiator pipes on outermost layers thereof, are surface mounted so that the contact area among heating media, refrigerants and the thermoelectric power generation chip sets, and the thermal energy of the subsurface fire may be utilized efficiently. The thermoelectric power generation system is simple in process and may be well adapted to the engineering operating environment in the coalfield fire area.

The invention provides a high-heat-flux graphite heat-conducting film module stacking method. The method comprises the following steps of taking a plurality of graphite film raw materials; and stacking the graphite film raw materials on an operation table in sequence to form a graphite film module. The thick graphite film raw materials is a high-power heat-conducting graphite film and is a high-power graphite film raw material formed by burning an ultra-thick PI film (more than or equal to 125 microns) prepared by doping graphene and carbon nanotubes into traditional polyimide, and the thin graphite film raw material is a graphite film formed by burning a conventional polyimide material. The thick graphite film raw material is tightly attached to a heat source, so that the purposes of vertical high-heat-flux heat conduction and horizontal high-energy heat storage of heat energy of the heat source are achieved. The thin graphite film raw material plays a role in heat homogenization, thethick graphite film raw material and the thin graphite film raw material are bonded through glue with a certain thickness, due to the thermal resistance effect of the glue, the high heat conduction efficiency of the heating end can be improved through the high-power graphite film module, and it is guaranteed that when heat conduction is conducted in electronic equipment, a shell of the electronicequipment cannot be overheated, and a human body cannot be scalded.

An improved chip package structure includes a chip carrier, a chip, a plurality of pins, a plurality of leads, a package body and a heat spreader. The chip is fixed on the chip carrier. The leads are electrically connected between the chip and the pins. The package body is packaged outside the chip carrier, the chip and the leads. The heat spreader is disposed in the package body. The heat spreader contacts the chip carrier, and is partially exposed out of a face (top face) of the package body. Heat generated by the chip can thus be transmitted to a heatsink via the chip carrier and the heat spreader so as to discharge a large amount of heat generated by the chip to the outside. The improved chip package structure has a good heat conduction efficiency and an effectively enhanced heat spreading efficiency.

The invention discloses a power supply coil with a built-in cooling structure. The power supply coil comprises an annular iron core and a winding coil wound on the annular iron core, and further comprises two annular heat dissipation sleeves sleeved at two ends of the annular iron core, and grooves with helical gear teeth are formed in the outer surface walls of the annular heat dissipation sleeves. The winding coil wound on the annular iron core is distributed at intervals, the two ends of the annular iron core are sleeved with the two annular heat dissipation sleeves, the grooves are formedin the outer surface walls of the annular heat dissipation sleeves, the winding wire of the winding coil is clamped into the grooves, so when the two annular heat dissipation sleeves and the winding coil are mounted, the two annular heat dissipation sleeves only need to be oppositely inserted from two sides of the winding coil and then rotate reversely, and buckling connection of the two annular heat dissipation sleeves is achieved by means of guiding of the winding coil, so the spliced heat dissipation sleeves are convenient to install and detach, the contact area of the heat dissipation sleeves with the winding coil is increased, and the heat conduction effect is improved.