2815results about How to "Solve the cooling problem" patented technology

The invention discloses graphene heat radiation paint. The graphene heat radiation paint comprises the following ingredients, by weight, 40-80 parts of high-molecular resin, 5-15 parts of graphene, 1-8 parts of one-dimensional nanomaterials, 1-8 parts of heat conduction metal powder, 0.5-5 parts of dispersing agents, 0.5-5 parts of antifoaming agents and 100-200 parts of inert solvent. The heat conduction metal powder is at least one selected from silver powder, copper powder and aluminum powder and the granularity is 1-20 micrometers. The above paint has good heat radiation and heat conduction functions. The invention also discloses a preparation method for the graphene heat radiation paint. The preparation method mainly comprises processes of stirring, grinding and reblending. Operation is simple, and the cost is low. The graphene heat radiation paint is mainly applied in heat radiation of daily electronic products and also can be applied in spaceflight electronic devices with high requirements because of good heat conduction and heat radiation functions.

The invention discloses a microwave ablation needle and a microwave ablation therapeutic apparatus thereof, and relates to a structure of the microwave ablation needle and the microwave ablation therapeutic apparatus using the microwave ablation needle. The microwave ablation needle mainly comprises an ablation needle, an ablation needle tube, a microwave coaxial cable, a capillary, a handle with a crank, a temperature sensor, a fixed frame, a high-frequency joint and a water cavity, wherein the fixed frame comprises the high-frequency joint, a water inlet joint, a water outlet joint and the temperature sensor and is connected with a terminal external socket; the high-frequency joint comprises a lock card reed; and the water cavity used for circulating cold water is arranged in the handle. The circulating water enters the capillary from the water inlet joint, then enters the water cavity from the ablation needle tube, and finally flows out from the water outlet joint. The microwave energy enters the microwave coaxial cable from the high-frequency joint, and radiates through the ablation needle. The microwave ablation needle, a microwave power source and a computer control unit form the microwave ablation therapeutic apparatus. The microwave ablation needle and the microwave ablation therapeutic apparatus are mainly used for treating tumor through microwave ablation.

The invention relates to a cooling water channel structure for a motor casing, comprising an inner motor casing and an outer motor casing, wherein the outer motor casing is hermetically sleeved on the inner motor casing so as to form a cooling channel between the inner motor casing and the outer motor casing, the outer motor casing is provided with a cooling liquid inlet and a cooling liquid outlet, the cooling liquid inlet is communicated with the cooling liquid outlet through the cooling channel, and preferably, the cooling channel is provided with a plurality of reinforcing ribs so as to guide the flow direction of a cooling liquid; and the cooling water channel structure for the motor casing further comprises a first sealing ring, a second sealing ring, a stopping and limiting part, a cooling liquid source and a power source, wherein the first sealing ring and the second sealing ring are used for sealing the outer motor casing and the inner motor casing, and the stopping and limiting part is arranged on the inner motor casing and used for stopping and limiting the outer motor casing. The cooling water channel structure for the motor casing in the invention has the characteristics of skillful structural design as well as simple and novel structure, can rapidly radiate heat for a motor so as to solve the problem on motor heat radiation, improve motor performance and finally improve the efficiency and prolong the service life of the motor, and is suitable for large-scale popularization and application.

The invention relates to a glass coating containing a fluorophor and a method for producing the glass coating, and a light-emitting device containing the glass coating and a method for manufacturing the light-emitting device. The method for producing the glass coating containing the fluorophor comprises the following steps of: (1) mixing the powder of glass B and the powder of fluorophor C, an organic solvent and a binder in a mass ratio of 100: (1-100): 150 together into even paste; (2) evenly spreading the paste on a glass substrate A, and drying the glass substrate A coated with the paste so that the organic solvent is completely volatilized; and (3) sintering the dried glass substrate A coated with the paste, thereby obtaining the glass coating containing the fluorophor on the surface of the glass substrate A, wherein the process of sintering is as follows: increasing the temperature to temperature D1, so that the binder is decomposed and volatilized completely, and then increasing the temperature to temperature D2 so that the powder of glass B is softened and united to form a continuous glass body, thus obtaining the glass coating containing the fluorophor C on the surface of the glass substrate A.

The invention provides an electric automobile cooling system, comprising an electric water pump (1), an electric machine controller (MCU) (2), an electric machine (3), a radiator (5), a fan (4), an expansion tank and hose (6); wherein the electric machine (3) and the electric machine controller (2) are arranged in the front cabin of the electric automobile. The electric water pump (1), electric machine controller (2), electric machine (3) and the hose for the radiator (5) are connected with each other to form a cooling circuit; the fan is arranged at the back part of the radiator and the headwind and the cold air driven by the fan exchange heat with the radiator. When one of the electric machine temperature and the electric machine controller temperature achieves the preset value, the cooling system starts to work. When the two temperatures are lower than the preset value, the cooling system stops to work. Therefore the service life of the electric water pump is prolonged and the reliability of the cooling system is increased.

The invention discloses a solar energy comprehensive utilization apparatus that comprises a photovoltaic generating assembly, a temperature difference generating assembly, and a cooling device. The photovoltaic generating assembly receives solar radiation and converts solar energy into electric energy. The temperature difference generating assembly, which is arranged at a backlight side of the photovoltaic generating assembly, is used for converting heat energy that is from the photovoltaic generating assembly into electric energy; besides, the temperature difference assembly includes a hot end and a cold end that is at an opposite side of the hot end, wherein the hot end is contacted with the backlight side of the photovoltaic generating assembly. The cooling device, which contains fluid medium, is arranged at one side of the temperature difference generating assembly and is contacted with the cold end of the temperature difference generating assembly; moreover, the cooling device enables the cold end of the temperature difference generating assembly to be cooled by circulating the fluid medium as well as thermal fluid medium is generated for utilization. According to the invention, a modularized solar energy generating and heat recovery and utilization apparatus is established, thereby realizing high efficient solar energy generating efficiency and electric heating comprehensive utilization efficiency.

The invention provides a novel light emitting diode (LED) encapsulation structure which directly adopts a silicon dice substrate as both a surface mounting bracket and a radiation channel of an integrated structure support of an LED chip; a front electrode connecting layer is arranged on the front surface of the silicon dice substrate; the front electrode connecting layer on the front surface of the silicon dice substrate is connected with an electrode metal bonding pad at the back of the silicon dice substrate through a lead of a silicon groove side-wall or a lead of a through-hole of the silicon dice substrate; and at least one LED chip is welded directly by flip-chip on the front electrode connecting layer of the silicon dice substrate with an optical source through a metal bump. The invention also provides a method for manufacturing the LED encapsulation structure. The invention avoids steps of die bonding and gold-wire welding and enhances the connection reliability of chips and especially the connection reliability of multi-chip modules; and the invention leads the encapsulation of high-power LED and especially the encapsulation of multi-chip module to be miniaturized and also leads power-supply drive and circuits of LED protection and the like to be integrated on the silicon dice so as to provide a systematic and integrated encapsulation proposal for high-power LED illumination.

The invention discloses an air and water hybrid cooling high-speed permanent-magnet motor and belongs to the technical field of motors. The large-power high-speed permanent-magnet motor comprises a casing, a cooling water jacket, a stator core, a stator radial air duct, a stator inner air duct, a motor rotor, an outer rotor axial fan, an outer rotor fan fixing frame and two sliding bearings. The stator core is divided into two sections, the radial air duct is reserved in the middle, and the inner air duct is reserved in a stator slot close to the air gap position. The cooling water jacket is arranged outside the stator casing, a spiral water way is arranged in the water jacket, and water flows into the water way from the middle of the water way and flows out from a left spiral water outlet and a right spiral water outlet which are arranged at two ends of the water way. The air and water hybrid cooling high-speed permanent-magnet motor can mechanically solve the problem that a permanent magnet is broken when bearing large pulling stress during high-speed rotating, further solves the problems that the large-power high-speed motor is large in loss density, difficult in heat dissipation and over high in temperature rising, and prevents the permanent magnet from having irreversible demagnetization easily at high temperature.

The invention relates to a high-power optical fiber transmission system. The high-power optical fiber transmission system comprises a laser transmission optical fiber, an end cap, a cladding stripper, a shell, a beam shaping device and a laser protection window. The high-power optical fiber transmission system is characterized in that the laser transmission optical fiber is connected with the end cap in a welding mode, the cladding of the laser transmission optical fiber is combined with the cladding stripper, the end cap, the laser transmission optical fiber, the cladding stripper and the beam shaping device are all fixed in the shell, the laser protection window is fixed on the shell, the beam shaping device and the laser protection window are arranged at the front end of the end cap, a water cooling channel is formed in the shell, and the cladding stripper and one section of the laser transmission optical fiber are arranged in the water cooling channel. According to the high-power optical fiber transmission system, the cladding of the transmission optical fiber is combined with the cladding stripper, the cladding stripper, the transmission optical fiber and the end cap are arranged in the water cooling channel, radiating and cladding stripping of the high-power optical fiber transmission system are achieved, and reliability and long-term stability of devices are improved.

The invention relates to a light-emitting diode (LED) chip and a manufacturing method thereof. Materials with high heat conductivity are used as a support substrate of the LED chip, and the support substrate is sequentially provided with a bonding material layer, a reflecting layer, a transparent electrode layer, an epitaxial layer and an n-surface electrode. The manufacturing method comprises the following steps of: coating a transparent conducting layer on a sapphire substrate GaN epitaxial wafer by vaporization; coating the reflecting layer on the conducting layer by vaporization; spreading the bonding material layer on the reflecting layer, and bonding the sapphire substrate GaN epitaxial wafer to the substrate; removing the sapphire substrate by combining mechanical grinding, chemical mechanical polishing and wet-method corrosion; etching an n-GaN, an active layer and a p-GaN by using inductively coupled plasmas, removing the undoped GaN layer by etching with a potassium hydroxide solution, and coarsening the surface of the n-GaN; and coating the n-surface electrode to the n-GaN layer by vaporization to form an ohmic contact. The invention avoids the damage to the GaN-based LED epitaxial layer and the bonding layer caused by the stripping of the sapphire substrate by using laser, and the heat radiation efficiency is improved by using the substrate with high heat conductivity.

The invention discloses a liquid cooling temperature control and management method of a power lithium ion battery. The liquid cooling temperature control and management method comprises the steps of: 1) acquiring temperature and current; 2) obtaining a highest temperature value, a lowest temperature value, greatest temperature difference and liquid cooling system inlet and outlet temperature difference; 3) judging whether the current is large or not and computing a working state 1; 4) judging whether the temperature of the battery is high or not, computing a working state 2; 5) judging whether temperature difference of the battery is too great or not and computing a working state 3; 6) judging whether the outlet temperature of a battery pack is too high or not and computing a working state 4; 7) judging whether the temperature difference of circulating medium at the inlet and outlet of the battery pack is too great or not and computing a working state 5; and 8) comparing the computed working state 1, the working state 2, the working state 3, the working state 4 and the working state 5 to obtain a working state with the best heat dissipation effect for setting. The liquid cooling temperature control and management method of the power lithium ion battery solves the problems that the temperature of the battery is too high and the local temperature difference is too great, and has the beneficial effects that the performance of the battery is improved and the service life of battery is prolonged.

The invention provides a light emitting diode (LED) chip structure and a manufacture method thereof. Prior to manufacturing the traditional electrode structure, partial perforation is carried out on the well grown epitaxial structures by the method of wet etching or dry etching to cause the N-shaped gallium nitride layer to expose; meanwhile, the size and layout of the apertures are arranged reasonably according to the requirements of heat dissipation and current distribution. On the premise of ensuring good heat dissipation, the technical proposal provides more light-emitting surface so that light can be emitted from the lateral surface and the top surface simultaneously. At the same time, the current is distributed more evenly and reasonably owing to good current distribution design. The design not only can be used for common luminescence chips but also is especially suitable for power LED chip structures with high current. The technology mentioned in the invention fundamentally improves the heat dissipation and light emitting efficiency and the improved required technique is simple and efficient and does not need extra processing equipment and materials.

The invention discloses a thermal management system for low temperature starting of a fuel cell power generation system and a method thereof. The thermal management system comprises an internal circulating heating system and an external circulating cooling system. The internal circulating heating system is composed of a fuel cell stack, a fuel cell stack cooling liquid outlet sensor, an outlet tee, a water tank, a heater, an internal circulation pump, an internal circulation one-way valve, an inlet tee, and a fuel cell stack cooling liquid inlet sensor. And the external circulating cooling system consists of the fuel cell stack, the fuel cell stack cooling liquid outlet sensor, the outlet tee, the water tank, an external circulation pump, a radiator, an external circulation one-way valve, the inlet tee, and the fuel cell stack cooling liquid inlet sensor. By adding an internal circulating heating system, the system of the invention solves the heat radiation problem of the fuel cell stack, and simultaneously can rapidly raise the temperature of the fuel cell stack, which can be always maintained in an optimal working temperature range. Thus, the performance of the fuel cell can be maintained in a most stable state, and the service life can be prolonged.

The invention relates to a refrigerator having multiple temperature zones. A refrigerating chamber is located at the upper half part of a refrigerator body of the refrigerator; a freezing chamber and a variable temperature chamber are located at the lower half part of the refrigerator; a condensation section pipeline of a hot-end gravity heat pipe is upwards arranged on the inner side of the left wall surface of a casing of the refrigerator; evaporation section pipelines of a cold-end gravity heat pipe are downwards arranged on the back wall surface and left and right wall surfaces inside the variable temperature chamber; a condensation section of the cold-end gravity heat pipe is connected with a cold end of a free-piston Stirling cooler by the aid of a cold conduction copper sleeve; and an evaporation section of the hot-end gravity heat pipe is connected with a hot end of the free-piston Stirling cooler by the aid of a heat conduction copper sleeve. The free-piston Stirling cooler has the characteristics of wide cooling temperature zone, compact structure, high low-temperature cooling efficiency and the like and enables the variable temperature chamber to realize the lowest temperature of subzero 60 DEG C through combination with the advantages of high heat transfer efficiency and simple structure of the gravity heat pipes. According to the novel refrigerator having the multiple temperature zones, different cooling temperatures inside the refrigerator can be accurately controlled through adjustment of the working frequency of a variable frequency compressor and the input voltage of the free-piston Stirling cooler.

The present invention provides a permanent magnet synchronous motor, belonging to the technical field of motors. The permanent magnet synchronous motor is characterized by: adoption of a solid shuttle-shaped rotor structure; a large radial air gap and an axial non-constant air gap; a permanent magnet adopting a radial buried structure; a starting squirrel cage embedded on the rotor; and the rotor and a stator both provided with corresponding ventilation ducts that facilitate cooling air which passes through the large radial air gap to take away heat of the surface of the solid rotor and heat of the stator itself. The permanent magnet synchronous motor in the invention not only solves a problem of starting difficulty in a permanent magnet motor having a conventional laminated rotor, but also solves a problem of heat dissipation difficulty in a permanent magnet motor having a conventional solid rotor. The permanent magnet synchronous motor in the invention with a starting torque from 2.0 to 3.0 further overcomes a problem of easy demagnetization of the permanent magnet caused by a too high temperature of the rotor.

The LED with thermal channel adhesive layer is characterized in that, forming metal bulge on adhesive layer that combines base plate and LED stack, or the semiconductor bulge penetrates adhesive layer, both to form heat dispersion channel to increase heat dispersion effect and improve stability and efficiency; wherein, the said LED at least comprises a said plate, a insulating layer, a LED stack formed on insulating layer, and a said adhesive layer.

The invention discloses a power battery composite heat management system and a method thereof. The power battery composite heat management system comprises a water tank filled with a circulating fluid, a circulating pump, a sealing cover plate of the water tank, and a battery pack array which is fixedly mounted above the sealing cover plate and is composed of a plurality of battery cells, wherein a temperature equalizing plate and a heat pipe are adhered onto the surface of each battery cell respectively, and cooing sections of the heat pipes pass through the sealing cover plate to be arranged in the circulating fluid in the water tank; a circulating fluid inlet is formed in one side end of the water tank, a circulating fluid outlet is formed in the other side end of the water tank, and a circulating fluid turbulent flow structure is arranged inside the water tank, so that the circulating fluid flows into the circulating fluid outlet from the circulating fluid inlet of the water tank in a curve flowing manner. The system and the method thereof can solve the technical problems such as heat dissipation, battery pack temperature difference reduction, battery preheating and heat cyclic utilization under different working conditions of batteries; and meanwhile, the system is compact and simple in structure and convenient in installation and maintenance, accords with the development tendency of battery heat management systems and electric automobiles, and has good application prospects.

The invention discloses a speed regulation method for a fan. Wherein, acquiring the lowest and highest rotation speed of fan as well as opposite chip temperature to determine the variation relation between speed and temperature; when need, obtaining current chip temperature to determine fan rotation speed according to said relation. It also discloses a fan combination, which comprises a single board with chip, a heat sink on chip, a fan fixed on said sink, and a temperature sensor on said board. This invention not only solves heat dissipation problem of board well, but also overcomes the noise and dust difficulty.

The invention discloses an automated Congou black tea production process, which includes a staged dynamic withering technique, a continuous and progressive pressure rolling technique, a high-speed rotational deblocking technique, a variable-temperature dynamic fermentation technique, a microwave tempering and dehydration technique and the like; the staged dynamic withering technique is carried out by four automatic vertical withering machines, the continuous and progressive pressure rolling technique is carried out by six 65 model automatic rolling machines, the high-speed rotational deblocking technique is carried out by a high-speed rotating roller type deblocking machine, the fermentation temperatures of different stages are controlled by an automatic fermentation machine in the variable-temperature dynamic fermentation technique, and on-line tempering is carried out by a microwave tempering machine in the microwave tempering and dehydration technique. The automatic vertical withering machines, the automatic rolling machines, the high-speed rotating roller type deblocking machine, the automatic fermentation machine, the microwave tempering machine, two automatic driers and other equipment are connected through a production line and adopt an automatic control system, consequently, Congou black tea processing realizes automated, continuous and clean production, the quality and sanitary quality of the tea are increased, and the working efficiency is remarkably increased.