1842results about How to "Even heat dissipation" patented technology

The invention discloses a heat-dissipating double-sided adhesive tape with an ultrahigh heat conductivity coefficient. Ethylene glycol or triethylamine is added into a polyamic acid solution, the resulting mixture is put in an oven in a vacuum environment and maintained at 100 DEG C for 0.9-1.1 hours, the temperature is raised to 300 DEG C and maintained for 0.9-1.1 hours, followed by natural cooling, to produce a polyimide film; the polyimide film is heated up to 250 DEG C from room temperature and then heated up to 500 DEG C, and further heated up to 1200 DEG C at a rate of 9-11 DEG C / min, to produce a prefired carbonized film; the prefired carbonized film obtained in the step 4 is rolled by a calendar; the rolled product is heated up to 2400 DEG C at a rate of 19-21 DEG C / min and maintained for 0.9-1.1 hours and then heated up to 2900 DEG C at a rate of 19-21 DEG C / min and maintained for 1.8-2.2 hours, followed by cooling, to produce a fired graphite film; and subsequently the graphite film is rolled to obtain a graphite coating. The heat transfer performance of the double-sided adhesive tape in both the vertical and the horizontal directions are improved, so as to prevent local overheat of the adhesive tape and ensure uniformity of heat transfer performance of the adhesive tape.

A temperature-homogenizing device for uniformly dissipating heat generated from electronic components in an electronic device to a housing of the electronic device includes a first and a second higher thermally conductive layers and a first lower thermally conductive layer. The first lower thermally conductive layer is disposed between the first and the second higher thermally conductive layers, and made of a material or a medium having a lower thermal conductivity than each of the first and the second higher thermally conductive layers. By means of this temperature-homogenizing device, the heat is homogeneously distributed throughout the first and the second higher thermally conductive layers at a higher thermal conduction rate and transferred through the first lower thermally conductive layer at a lower thermal conduction rate so as to maintain homogeneous temperature distribution on the housing.

The invention discloses a data center, comprising a cabinet and at least one server system, wherein the cabinet is provided with an elevated floor, and the at least one server system is arranged in the cabinet; the server system comprises multiple severs at different heights; and the elevated floor has a ventilating grate hole. The cooling system used for the data center comprises an air conditioner, multiple temperature sensors respectively arranged nearby the exhaust ends of the servers, a group of guide fans arranged nearby the ventilating grate hole of the elevated floor, and a control module electrically connected with the air conditioner, the temperature sensor and the guide fans, wherein the cool air from the air conditioner is injected below the elevated floor; the guide fans can drive the cool air to pass through the ventilating grate hole to flow upwards at an acceleration mode; and the control module adjusts the rotation speed of the guide fan based on the temperature value acquired by the temperature sensor, so as to enable the cool air to be uniformly distributed, and servers at different heights to uniformly cool. Compared with the prior art, the data center provided by the invention can improve the cooling efficiency, so as to save energy.

The invention discloses a pulse width modulation (PWM) control method for a single-phase grid-connected inverter, which is implemented according to the steps of: calculating to obtain single-polarity PWM wave; comparing network voltage detection with a zero crossing comparator to obtain a synchronous square wave signal, and then performing two divided-frequency on the synchronous square wave signal to obtain a synchronous square wave two divided-frequency signal; keeping only one of four power switch tubes of a single-phase full-bridge inverter in a high-frequency PWM action state, the power switch tube, which is on the diagonal of the power switch tube, of another bridge arm in a power frequency action state, and the other two power switch tubes in a shutoff state; making the four power switch tubes alternately act in a high-frequency PWM mode according to certain phase sequence; and adopting a principle that the power switch tube which conducts shuts off in advance to add dead zone time only during the zero crossing of network voltage at the same time. The method is applicable to single-phase grid-connected power generation systems, and has the characteristics of reducing the loss of switches, eliminating dead zone effect and optimizing heat dissipation.

The invention relates to a prism-array jet micro-channel radiator. The radiator comprises a prism-array structure, a jet structure, an outlet-inlet cross structure, a liquid separating structure and an outlet-inlet arrangement structure. In the invention, cooling liquid enters the radiator via an inlet and then is led to side clearance through the liquid separating structure so as not to be mixedwith cooling liquid at an outlet; the distance between the outlet and the inlet is shortened by means of the comb-shaped outlet-inlet cross structure so as to reduce pressure drop; after reaching themultihole jet flow structure, the cooling liquid can be uniformly introduced onto a heated silicon substrate so that the temperature of the substrate is more uniform, heat is more easily taken away by the generated turbulent flow and meanwhile the pressure drop is also reduced by the jet structure; and finally the cooling liquid easily forms turbulent flow by means of the prism-array structure sothat the heat transferred to the prism structure from the substrate is more easily taken away, thus increasing the heat exchange efficiency. The prism-array radiator can be used in a cooler for microstructures such as an electronic chip, an LED and the like.

The invention discloses a computer case. The computer case comprises a case body, wherein the case body is of a straight cylindrical structure extending along the axis, an air inlet is formed at one end of the case body, and an air-out fan set used for supplying air is formed at the other end of the case body; when the air-out fan set comprises a fan, the cross section contour of the case body is same as the outer contour of the air-out fan set in shape; and when the air-out fan set comprises a plurality of fans, the cross section contour of the case body is same as the outer contour of a region jointly defined by the contours of the fans and the common tangent of the contours of two adjacent fans in shape. Therefore, electronic elements in the computer case are arranged in an air duct, and the heat radiating efficiency is accordingly improved.

The invention relates to a cooling device comprising a heat-conducting cooling plate on the side of the electronic power components to be cooled and a platelike cooling fluid distributing device. The distributing device has cooling fluid outlets on the side facing the cooling plate, said outlets being arranged at a distance from and pointing towards the cooling plate. The distributing device also comprises at least one drain outlet for the cooling fluid. The invention aims at providing a cooling device which is suitable for different forms and number of power components and ensures even cooling throughout the entire cooling surface for different forms and number of power components while simplifying the production of said cooling device. In order to achieve said aims, the cooling device comprises a first plate in which outlets and a plurality of drain outlets are evenly distributed and a second plate and a third plate which are superimposed, wherein two plates define a feed channel that is connected to all outlets and a drain channel that is connected to all drain outlets.

The invention relates to a life-cycle water-free cooling solution which is characterized by comprising the following components in percent by weight: 10-50 percent of propylene glycol, 50-80 percent of ethylene glycol, 0.1-10 percent of triazole compounds, 0.5-3.0 percent of sebacic acid, 0.2-1.0 percent of adipic acid, 0.5-1.5 percent of sodium benzoate, 0.3-5 percent of inorganic base, 0.01-0.1 percent of antifoaming agent and 0.01-0.1 percent of colouring agent. The cooling solution has a freezing point of below -50 DEG C and a boiling point of 166-191 DEG C; and because the cooling solution does not contain water, problems of boiling, gas etching, evaporating, scaling, rusting and the like caused by water existing in the cooling solution are thoroughly eliminated, a steam air resistance layer seriously influencing heat radiation is avoided from generating, power of an engine can be effectively improved and fuel is saved. Because the cooling solution does not contain water and has a reasonable corrosion inhibition system, the problem of corrosion is thoroughly solved; and the cooling solution has a service life of reaching up to 8 hundred thousand kilometers, is added once without replacement, is a life-cycle cooling solution, is especially suitable for military vehicles, high-end vehicles and high-power heavy-loading trucks and passenger cars, and can ensure that the vehicles safely run under extremely hot weather, severe cold weather, and severe environments such as desert, plateau, snowfield and the like.

The invention discloses an efficient cooling air conditioner system of a rack-mounted server cabinet. The system comprises a refrigerating module and a cabinet body provided with an air inlet. The refrigerating module conveys cold air to the cabinet body through the air inlet, a partition board is arranged in the cabinet body, one side of the partition board is an air flue, the other side of the partition board is provided with a containing space used for containing a server, the cross section of the air flue is gradually reduced in the flow direction of the air, the partition board is provided with a plurality of air inlets in the flow direction of the air, and the air inlets are provided with arc-shaped flow guide plates. By means of the partition board, the cross section of the air flue is gradually reduced in the flow direction of the air, so that the cold air entering air gaps is equal in speed and amount, and uniform heat dissipation is achieved. Due to the facts that a sound-insulating material layer is arranged on a shell, arc-shaped transition plates are arranged on the corners of the cabinet body and the arc-shaped flow guide plates are arranged on the air inlets, noise is lowered, and the system is low in noise during work.

A rechargable battery with an internal microcontroller. The microcontroller contains a memory in which data regarding the environment to which the battery is exposed are stored. These data are read by a processor integral with the charger used to charge the battery. If these data indicates the battery may have been subjected to a harsh environment, such as being exposed to an excessive temperature, the charger performs a fulle state of health evaluation of the battery.

A light module comprises a light unit, a heat transferring plate or a plurality of heat transferring pipes, and a plurality of heat dissipating fins. The heat transferring plate or heat transferring pipes are positioned on the bottom surface of the light unit to transfer heat generated by the light unit. When the heat transferring plate is used, the heat dissipating fins are arranged under the heat transferring plate and perpendicular to the bottom surface of the heat transferring plate. The heat dissipating fins have a recess for the accommodation of the heat transferring plate and the light unit. When the heat transferring pipes are used, the heat dissipating fins each contact the heat transferring pipes. Uniform heat dissipation is thus attained.

The invention provides an axial permanent magnet assisted radial reluctance high-speed motor with a hybrid cooling structure, and relates to the technical field of motors. The motor provided by the invention is provided with an air cooling and water cooling structure on the basis of a dual group 6 / 4-pole switched reluctance motor structure. The motor comprises a casing, a front end cover, a rear end cover, a rotor and a stator, and is characterized in that an inter-tooth slot of the stator and the rotor form a cooling air channel, each end cover is provided with air discharging holes, the casing is provided with a cooling air inlet, a cooling water inlet pipe opening, a cooling water outlet pipe opening and a circumferential ring-shaped air guiding channel, the back of a ring yoke of the stator is provided with a spiral water channel pipe, and two ends of the rotor are provided with self-cooling fans respectively. According to the invention, a cooling structure combining the air cooling stator and the water cooling stator is adopted, and a water cooling function and an air cooling function are opposite in direction and complementary in cooling region, so that the stator and the rotor of the motor are effectively enabled to be reduced in temperature, a problem of difficult heat dissipation of the motor under a high-speed operating condition is avoided, thus long-term safe and stable running of the motor is ensured, and the service life of the motor is effectively prolonged.

Water-cooling arrangement includes stator cage and cooling water channel. Cooling water channel in stator cage is arranged in axial direction inside stator cage in not helical round about manner. The cooling water channel can be as single circuitous water channel, or a combination formed from multiple circuitous water channels. Each pair of water channel possesses a cooling water outlet and a cooling water inlet. The cooling water outlet and a cooling water inlet can be arranged at axial same side of stator cage, or arranged at different sides. Water outlets and water inlets of multiple water channels can be arranged in same direction or in reversal directions. Circuitous water channels are in reversal directions can reduce temperature gradient at different parts of the stator cage further.

A cooling method for an LED lamp is disclosed. An LED lamp is provided. The LED lamp includes a housing and at least one LED light source module. The housing has a cover body, a base and a plurality of air outlets. The base forms at least one segment difference portion. The slanted surface of the segment difference portion has a plurality of air inlets. The LED light source module is adjacent to the air inlets. The LED light source module has a cooling device and the cover body has a plurality of air outlets. Airflow is guided into the cooling space along the air inlet on the slanted surface of the segment difference portion. When the LED lamp generates heat, air entered into the cooling space is blown to the cooling device. The airflow with heat is exhausted from the air outlet of the cover body.

A digital micromirror device (DMD) module includes a circuit board, a DMD element, a soft elastic pad, a heat dissipation pad and a heat sink. The circuit board includes a first surface, a second surface and a through hole, wherein the first surface is opposite to the second surface. The DMD element is electrically connected to the circuit board. The soft elastic pad is disposed on the first surface of the circuit board and surrounds the through hole. The heat dissipation pad passes through the through hole and contacts the DMD element. The soft elastic pad is sandwiched between the circuit board and the heat sink, the heat dissipation pad is sandwiched between the heat sink and the DMD element, and the heat sink contacts the soft elastic pad and the heat dissipation pad, so as to apply a force to the soft elastic pad and the heat dissipation pad.

The invention discloses a high molecular electric ground heating module with waterproofness, high temperature resistance and flame-retarding function, which belongs to the field of heating devices. A waterproof layer is coated outside a non-woven fabric layer; the upper layer of a heat-preserving layer is a heating layer; the bottom of the heat-preserving layer is coated with a reflecting film by using a pure metal aluminum foil; the non-woven fabric layer is coated outside the heat-preserving layer, the heating layer and the reflecting film; the waterproof layer is made of a cement-based high molecular waterproof material; the heating layer is a membrane made of a high molecular carbon fiber heating material; the heat-preserving layer is a high-density phenolic aldehyde board; the reflecting film is covered at the bottom of the heat-preserving layer through a pure metal aluminum foil; the layers are bonded by using high-temperature-resistant environment-friendly glue, and are formed by pressing; and the outer periphery of each layer is provided with metal aluminum foil wrappings. The high molecular electric ground heating module has the advantages of attractive, dampness prevention, electric heating transformation efficiency of over 99 percent, saving in electricity and energy, safety, reliability, high insulating property, long service life, quick temperature rise, environment friendliness, health-care physical therapy effect and good health-care effect on human bodies.

The invention discloses an anti-collision electric power cabinet with a height adjustment function. The anti-collision electric power cabinet comprises a base, a cabinet body, screw thread rods, a first motor, belt wheels, a belt, sleeves, protection plates, a spring, a cylinder body, a piston rod and a safety airbag. By virtue of setting of the first motor, the screw thread rods, the belt wheelsand the belt, the height of the cabinet can be adjusted, and damage to the electrical power equipment in the cabinet body caused by large-area ground water accumulation can be avoided; by virtue of matching of a second motor, a circular ring, a movable rod and a fan, the fan can be driven to move left and right, so that the electric power equipment can be subjected to heat dissipation by the fan completely and uniformly in a mobile manner with a good effect, so that heat dissipation efficiency is improved; and by virtue of setting of the protection plates, the piston rod, the piston, the cylinder body and the safety airbag, the safety airbag is inflated with air when the protection plates on the two sides of the cabinet body suffer from collision, so that the electric power equipment in the cabinet body is further buffered and protected, and damage to the electrical power equipment in the cabinet body can be avoided.

An electronic device with uniform heat-dissipation is disclosed. The electronic device comprises a housing, a circuit board, and a metal shielding. The housing has concavities at inner sides thereof, and the circuit board is disposed within the housing. The metal shielding is disposed between the housing and the circuit board and has protrusions at outer sides thereof to match up the concavities of the housing. Thereby, the metal shielding substantially stays close to the housing for allowing the electronic device to dissipate heat uniformly.

A handheld communication device with a heat dissipating structure includes a housing, a heat generating unit and a heat dissipator. The housing includes a chamber formed therein; the heat generating unit is received inside the chamber; the heat dissipator is arranged corresponding to the heat generating unit. The heat dissipator includes a heat pipe and a heat conductive plate. The heat pipe includes one end thermally attached to the heat generating unit and another end arranged away from the heat generating unit, and the heat conductive plate is thermally attached to the heat pipe. With such structure, the heat generated by the heat generating unit can be uniformly conducted to the heat conductive plate in order to prevent the accumulation of heat at the surrounding of the heat generating unit and to improve the efficiency of the heat dissipation of the device.

The invention discloses a power battery thermal management system, which mainly comprises power batteries, heat conducting devices, a liquid cooling plate, a control system and a heat dissipating device, wherein at least one group of heat conducting devices are arranged between the power batteries; each heat conducting device comprises a heat conducting graphite plate, a heat pipe embedded in the liquid cooling plate and fins; a heat conducting device mounting hole is disposed on the liquid cooling plate; a coolant flow channel is disposed in the liquid cooling plate; the rest part of the liquid cooling plate is filled with a phase change material; the liquid cooling plate is in communication with the heat dissipating device to form a heat dissipating circuit; the control system is configured to drive the coolant and control the circuit in which the coolant is located. The power battery thermal management system has high heat storage and heat dissipation efficiency, saves energy, improves the energy density of the battery pack, ensures that the power batteries are in a suitable temperature range in operation, and achieves the temperature consistency of the power batteries.

The invention relates to a micro-channel heat exchanger and a flow heat exchange experiment device. The micro-channel heat exchanger is characterized in that the heat exchanger at least comprises an upper cover plate and a lower cover plate; three flow channels, namely, a first flow channel, a second flow channel and a third flow channel, and the inlets and outlets of the three flow channels are machined on the upper cover plate and the lower cover plate respectively; the first flow channel, the second flow channel and the third flow channel are each composed of two Y-shaped flow channels; the first flow channel and the third flow channel are formed by connecting the bifurcate ends of two Y flow channels, and the second flow channel is formed by connecting the non-bifurcate ends of two Y flow channels; and when fluid flows in the first flow channel, the second flow channel and the third flow channel, the flow direction at the inlets and the flow direction at the outlets are perpendicular to each other. The heat dissipation performance is good. Electronic equipment of high heat flux density can be kept at uniform temperature.

The invention relates to a cooling tower fan optimal control system and method. The system comprises multiple cooling towers, a central controller, a cooling water inlet water temperature sensor, a cooling water outlet water temperature sensor, an outdoor temperature and humidity sensor and a cooling water transition confluence tank, wherein the cooling water inlet water temperature sensor is arranged at a water inlet of a refrigeration unit condenser, the cooling water outlet water temperature sensor is arranged at a water outlet of the refrigeration unit condenser, a flow control valve is arranged at an inlet of each cooling tower, an energy-saving controller, a temperature sensor for cooling water in a tower and a cooling fan, and the central controller is respectively connected with the cooling water inlet water temperature sensor, the cooling water outlet water temperature sensor, the outdoor temperature and humidity sensor, the energy-saving controllers and the flow control valves. Compared with the prior art, the cooling tower fan optimal control system provided by the invention has the advantages of automatic energy saving control, obvious energy saving effect, low production cost and the like.

A substantially anhydrous, thickened, spreadable, warming lubricant composition comprising a mixture of glycerin, polyhydric alcohol, a non-ionic surfactant, and a Carbomer thickener, the surfactant improving wetting and spreadability of the composition on skin and latex, and the thickener providing a creamy rich feel to the composition, such that the composition can be applied to skin or a condom and provide an optimal warming effect upon contact with ambient moisture during use and such that the composition can be added to a condom package and, over the course of a week, spread and coat nearly the entire internal and external surfaces of the condom.

The present invention relates to one kind of round Cr-Mo alloy steel billet produced in a bow-type continuous casting machine and its production process. The molten steel for the round Cr-Mo alloy steel billet contains P not more than 0.012 wt% and S not more than 0.002 wt%, and has Mn / S weight ratio not smaller than 200. The present invention features that the continuous casting process has the second cooling with specific cooling water amount of 0.47-0.53, the first region cooling water amount accounting for 35-45 %, the second region cooling water amount accounting for 22-32 %, the third region cooling water amount accounting for 14-24 %, the fourth region cooling water amount accounting for 9-19 %, and Mn / S content ratio in steel not smaller than 200. The present invention can produce continuously cast round low carbon alloy steel billet without crack, shrinkage hole and other defects.

The invention discloses a rapid cooling device for a computer mainframe box. The rapid cooling device comprises a base, two vertical damping rods are fixedly mounted at the top of the base, horizontal damping plates are slidably mounted on the damping rods and sleeve the damping rods, springs are mounted on the damping rods in a sleeving manner, the tops and the bottoms of the springs are fixedly connected with the corresponding damping plates and the base, damping blocks are fixedly mounted at the top of the base, vertical fixed rods are fixedly mounted at the tops of the damping blocks, vertical sliding rods are slidably mounted in the middles of the tops of the fixed rods, the tops of the sliding rods are fixedly connected with the damping plates, and damping cavities are formed in the fixed rods. By means of double damping, the shock resistance effect of a device body is greatly improved, transportation and use of the computer mainframe box are facilitated, a computer mainframe can be cooled within a wide range by one fan, cooling uniformity is ensured, and the use performance of a computer is improved.

An object of the present invention is to provide a cooler for cooling both sides (top and bottom surfaces) of a semiconductor device, wherein the variation of pressing force on flat cooling tubes holding a semiconductor device is reduced, thereby uniformly dissipating the heat generated by the semiconductor device. When the holding plates press the flat cooling tubes and semiconductor modules by tightening the nut, the dimensional tolerances in the stacking direction are absorbed by the deformable portions in the inlet and outlet headers. A spacer may be employed inside the flat cooling tubes in order to suppress the deformation of the flat cooling tubes along the stacking direction.

An object of the present invention is to provide a cooler for cooling both sides (top and bottom surfaces) of a semiconductor device, wherein the variation of pressing force on flat cooling tubes holding a semiconductor device is reduced, thereby uniformly dissipating the heat generated by the semiconductor device. When the holding plates press the flat cooling tubes and semiconductor modules by tightening the nut, the dimensional tolerances in the stacking direction are absorbed by the deformable portions in the inlet and outlet headers. A spacer may be employed inside the flat cooling tubes in order to suppress the deformation of the flat cooling tubes along the stacking direction.

The invention discloses a heat exchanger with a corrugated pipe coil structure provided with an internal duct and an external duct, which comprises an inlet, an outlet, a corrugated pipe, a dome, an internal ring bushing, an external ring bushing, a fan and a bracket. When fluid media to be in heat exchange flow in the corrugated pipe in the heat exchanger from the inlet, form a turbulent flow in a pipe wall with a corrugated structure and carry out heat exchange with air in the internal duct and the external duct outside the corrugated pipe via the wall of the corrugated pipe, the fan discharges air in the internal duct and the external duct, and the fluid media are discharged from the outlet after the heat exchange performed in the corrugated pipe in a spiral way. The heat exchanger has the advantages of high heat exchanger effectiveness, simple structural technology, light weight, integration, and the like, and the fluid media in the pipe coil after the heat exchange have even temperature, thereby the heat exchanger can be used for heat exchange of air, liquid and air-liquid mixing substances. When the corrugated pipe adopts resistant materials, the heat exchanger can be used for heat exchange for corrosive liquid media.