145results about How to "Increase the effective cooling area" patented technology

An intelligent, self-protected control module which is a fully protected and configured as a multi-terminal device controlling a number of power field-effect transistors for delivering power to loads. The device can contain a central processing unit or logic, precision Hall-Effect based current sensors for precise measuring of bypass currents, temperature sensors, and input/output circuitry as well as an optional RF receiver. The inputs can incorporate de-bouncing techniques to prevent false turn on/off. Inputs can provide command signals for the processor or logic with built-in watchdog circuitry to monitor the input power supply. The CPU or logic can provide communications with external devices, generate alarms, generate control signals to turn-on/turn-off power MOSFETs, and analyze currents and temperature of each channel. Unlike an electromechanical relay, the present invention is free from arcing and sparking, there are no contact materials to wear, and it is noiseless. The present invention provides over-current protection by shutting down a troubled channel if it is overloaded. It provides protection to the load by limiting the bypass current to the preset value, or shutting the channel off in a case of over-current. The present invention provides over-temperature protection by shutting down an appropriate channel if any of the MOSFET's temperature reaches a predetermined value. The present invention can generate an output signal that is capable of driving an external indicator lamp if a problem has occurred. An optional RF receiver designed to receive a coded signal from a key-chain transmitter can provide a method of enabling the module to accept a control signal from the input remotely.

A rotor and a stator are contained in a housing composed of front and rear frames, and a rectifier is mounted on the rear frame and covered with a rear cover having axial and radial openings. A minus heatsink plate having cooling fins extending in the axial direction is disposed to face the radial openings, forming radial air passages, and another air passage is formed between the minus heatsink plate and the rear frame. Cooling air introduced from the radial openings flows through the cooling fins and through the passage between the minus heatsink plate and the rear frame. Thus, efficiency for cooling the rectifier is enhanced.

The invention relates to a method for continuously synthesizing ethyl 4-chloroacetoacetates. The method comprises the following steps: pumping a cooled diketene solution into a falling film reactor through a metering pump, and enabling the cooled diketene solution to uniformly form a film through a distributor, and flow into the reactor from a tower top; meanwhile, controlling the flow of chlorine gas through a gas flow meter; introducing the chlorine gas into the reactor through a gas distributor; carrying out a reaction on the diketene and the chlorine gas on the surface of the falling film reactor; after the reaction is finished, enabling reaction liquid to flow out from a tower bottom and enter an esterification reaction kettle; pumping in different alcohols and overflowing into a next esterification reaction kettle to continually react; absorbing hydrogen chloride gas, which is generated in a reaction process, with water; after the reaction is finished, washing with water and neutralizing to remove the residual hydrogen chloride; distilling an organic phase to recycle a solvent and excessive alcohol raw materials to obtain a crude product; rectifying the crude product to obtain an ethyl 4-chloroacetoacetates product. With the adoption of the method, reaction time can be shortened, energy consumption is reduced, polychlorides are controlled, reaction selectivity is improved, rectification is relatively easy, and yield and purity of the product are improved.

A parallel-connected LED illuminant, including: a parallel-connected bracket, LED light emitting unit groups, and fluorescent powder layers. The parallel-connected bracket includes two or more than two linear substrate monomers. The linear substrate monomers are disposed in parallel. Each of the LED light emitting unit groups is disposed in the straight line on each of the linear substrate monomers along the long axis thereof. The LED illuminant is connected in series with electrode pins disposed at two ends of the parallel-connected bracket. The surface of each linear substrate monomer where each LED light emitting unit group is disposed is coated with each of the fluorescent powder layers.

The invention discloses a radiating structure for an outer-rotor direct-current brushless motor. In the radiating structure, a radiating boss is machined on the inner wall of a stator protective end cover; the plane of the boss is in insulative close contact with a radiating plane of an electronic element on a direct-current electric control circuit board; and a groove is reserved on the outer wall, corresponding to the position of the boss, of the stator protective end cover. Because an original radiating bracket installation position of the electronic element is changed to the boss of the inner wall of the stator protective end cover from a stator bearing bracket, the radiating boss of the electronic element is far away from a stator winding heating source, and the stator winding heating source is prevented from diffusing and transferring directly through the stator bearing bracket in a split structure mode; and because the radiating groove is reserved on the outer wall of the radiating boss, on one hand, a radiating effect is improved by increasing a radiating area, on the other hand, the rigidity of a shell of a product is improved and material cost is saved. The radiating structure has high radiating efficiency, high rigidity and low production cost, and is suitable to be used in various outer-rotor direct-current brushless motors.

The invention relates to the field of semiconductor illumination, in particular to an LED streetlamp comprising an LED light emitting module, a panel shell and a bottom shell, wherein the panel shell is provided with a light outlet and the LED light emitting module is arranged in a cavity defined by the panel shell and the bottom shell. The LED streetlamp is characterized by also comprising an optical cover plate which is arranged in the light outlet of the cavity, and further comprising a radiating module which is arranged in the cavity; the LED light emitting module is connected with the radiating module; and the bottom shell is provided with radiating holes. The invention provides an LED streetlamp with favorable radiating effect.

The present invention provides an energy storage system, particularly a battery system, that is capable of preventing self from overheating, comprising at least one energy storage unit each having two terminal posts extending outwards from the interior thereof; when there are at least two energy storage units, electrical connection therebetween is achieved by electrical connection elements that bridge the terminal posts of different energy storage units; at least one of the terminal posts and/or the electrical connection elements is in thermal connection with a heat transfer surface enlarging structure made of solid heat conductive materials. The present invention further relates to a method for preventing overheat of an energy storage system.

The invention relates to a well-radiating module power supply comprising a shell (1), a circuit board body (2) and a cover board (3). Two sides of the circuit board body (2) are provided with a plurality of heating elements (9). The inner bottom of the shell (1) is provided with a plurality of recesses (4) and conductive aluminum strips (5). The circuit board body (2) is disposed within the shell (1). Protrusions of the heating elements (9) are embedded in the recesses (4). The conductive aluminum strips (5) are abutted to the side of the circuit board body (2). Four inner corners of the shell (1) are provided with bosses (7) integrated to the shell (1); a positioning post (8) is fixed in each boss (7). The shell (1) is internally provided with a step face (6) along the inner upper edge. The cover plate (3) covers the step face (6). The well-radiating module power supply has the advantages that radiating is effective, rotation of the positioning posts is prevented, and a circuit board is stable and reliable.

The invention discloses a water-cooling type impact flour milling machine comprising a motor, wherein a motor shaft is fixedly connected with a rotor disc; a motor shell is connected with a shell through a flange disc; a shell cover plate is mounted on the upper end face of a shell; the bottom of the shell cover plate is fixedly connected with a stator disc; a stator part comprises the shell cover plate, the stator disc and a stator plunger pin; the stator part is provided with a heat radiation device and the heat radiation device comprises a cover plate water groove and a heat-conducting cushion plate; and the shell cover plate is provided with a cover plate of the cover plate water groove for covering the cover plate water groove. The water-cooling type impact flour milling machine disclosed by the invention can bring away heat by cooling water and air, so that the temperature of the cover plate and the shell can be reduced by about 20 DEG C, and the temperature raising of an impacted material is obviously descended. With the adoption of the water-cooling type impact flour milling machine, the quality of products produced by a production line is obviously improved and the edible quality of finished products is obviously improved. According to the water-cooling type impact flour milling machine, a hollow cavity which is arranged between the stator disc and the cover plate and can initiate resonance and amplify sounds can be reduced by more than 80%; and the cooling water has sound absorption effect, so that when the water-cooling type impact flour milling machine operates, the noise ratio is obviously reduced compared with the prior art.

The invention discloses a high heat-conduction ceramic heat-radiation nanocomposite material used for a LED lamp. The material takes bentonite, magnesium oxide, calcium carbonate, a MgAl2O4/SSZ-13 nano material, polymerization modified phenolic resin, silica, boron nitride, hydroxymethyl cellulose, and methyl acrylate as main materials, a MgAl2O4/SSZ-13 nano molecular sieve is subjected to coupling treatment, and then the organic modification of polyphenyl ether phenolic resin is carried out, the MgAl2O4/SSZ-13 nano molecular sieve material can be employed for forming heat-radiation particles, the heat-radiation particles have high thermal conductivity and thermal diffusivity on radial and axial directions, so that the ceramic heat-radiation material having excellent performance is produced. According to the invention, the MgAl2O4/SSZ-13 nano molecular sieve is subjected to coupling treatment, and then the organic modification of polyphenyl ether phenolic resin is carried out, and the prepared high heat-conduction ceramic heat-radiation nanocomposite material has excellent mechanical strength and heat-radiation performance.

The invention discloses a parallel flow integrated heat sink for superfine perforated pipes in a motor vehicle, which comprises an air-conditioning condenser, a water tank radiator and an engine oil cooler, wherein the water tank radiator and the engine oil cooler are arranged in parallel from side to side, separated by a heat-insulating layer, and positioned on the lower end of the air-conditioning condenser together; both ends of the air-conditioning condenser are provided with flow concentrating sections; a plurality of rows of the superfine perforated pipes are connected among the flow concentrating sections; wavy radiating fins are clamped between two rows of the superfine perforated pipes and respectively welded with one row of the superfine perforated pipes; a CO2 (R744) coolant gas-phase inlet pipe and a CO2 (R744) coolant gas-phase outlet pipe are respectively connected to the flow concentrating sections; and the flow concentrating sections on both ends are a plurality of sleeved structures capable of being arranged in the forward direction. The parallel flow integrated heat sink for the superfine perforated pipes in the motor vehicle integrates condensation of the prior vehicle air-conditioner, heat dissipation of a water tank and cooling of engine oil, is modularized, has light the overall mass and small occupied space, and adopts a multivariated parallel flow condenser and a segmented collecting pipe of the multivariated parallel flow condenser, so that refrigerant can flow to and fro for a plurality of times in the condenser and the heat exchange ability is strong.

The invention discloses a frameless type electric reactor convenient to wind wire. The frameless type electric reactor comprises coils, an iron core, wrapped wire struts and wrapped wire positioning modules; the wrapped wire struts are uniformly distributed on the side surface of the iron core; the coils are wound on the outer wall of the wrapped wire struts; the wrapped wire positioning modules comprise positioning pieces and snap joint pieces; each positioning piece is provided by the a wire head groove and a wire tail groove; and the wire heads and the wire tails of the coils are separatelyplaced into the wire head grooves and the wire tail grooves and locked by the snap joint pieces. According to the frameless type electric reactor convenient to wind wire provided by the invention, the frame structure in the conventional electric reactor is removed, the coils are directly wound on the wrapped wire struts on the outer side of the iron core, so that gaps are reserved between the coils and the iron core so as to form heat dissipation air flues, the effective heat dissipation area of the coils is increased, and the thermal loads of the surfaces of the coils are reduced; the wrapped wire positioning module, so that the wire heads and the wire tails do not need to be manually bound and fixed during the winding process of the coil, the outgoing positions of the wire heads and thewire tails can be accurately controlled in product production, the consistency of the products is improved, and the production efficiency is improved.

The invention discloses an iron core structure of a distribution transformer special for an electric vehicle. A plurality of stacked iron core unit chips are arranged inside an iron core, are similar in shape and different in cross section area and are arranged in the axial direction of the iron core and wrapped with an insulation layer, the cross section of the iron core is of a long-circular structure, the insulation layer is also of a long-circular structure, and the insulation layer comprises arc segments and linear segments tangent to the arc segments. According to the iron core structure, a common iron core with a circular section is designed into the iron core with the long-circular section, and the material consumption of the iron core and the production cost are reduced on the basis that the effective section of the iron core is ensured. Linear air channels and stepped arc air channels are arranged among the iron core unit chips, so that the effective heat dissipation area of the iron core is increased, and the heat dissipation effect is enhanced; thus, the temperature rise of the iron core is relieved, the over-excitation running capability of the transformer is improved, and the service life of the transformer is prolonged.

The invention discloses a composite copper bush for cooling. The composite copper bush comprises an outer copper bush, a horizontal high-heat-conductivity material layer and an inner copper bush which are laminated together closely and sequentially from outside to inside, the outer copper bush is prepared from chromium zirconium copper, and the outer copper bush is prepared from oxygen-free copper. The composite copper bush has high cooling efficiency, can improve performance of amorphous and nanocrystalline products, and can increase product percent of pass of amorphous and nanocrystalline belting equipment. The invention further discloses a preparation method of the composite copper bush.

The invention provides a construction method of an array type integrated magnetic piece of a multi-phase coupling inductor and the integrated inductor, and belongs to the technical field of inductors.The construction method comprises the following steps of: constructing a matrix structure , and arranging coupling magnetic core units in a matrix structure; constructing a matrix type integrated inductor based on the matrix structure; adopting multi-phase inductance symmetry full coupling or multi-phase inductance symmetry end-to-end sequential coupling to form a symmetrical integrated inductor.The construction method has the advantages that: direct-current magnetic bias can be eliminated, the coupling degree can be freely adjusted, and the number of integrated phases can be randomly expanded.

The invention provides a wind driven generator, and the wind driven generator comprises a rotor, a stator and an air gap located between the rotor and the stator. The stator comprises a stator coil and a stator core. The radial inner side of the stator iron core, a central part of the stator and an inner space formed by the enclosing of an end plate of the stator forms a cavity. The stator core isof a tooth slot structure, and the stator coil is located in a stator core trench. The wind driven generator further comprises a generator cooling device, and the generator cooling device comprises aventilation pipe, wherein the ventilation pipe is located between the stator iron core and the stator coil and adjacent to the stator coil and the stator iron core. According to the wind driven generator, the ventilation pipe is arranged at the bottom of the stator core trench and makes contact with the stator coil, thereby increasing the effective heat dissipation area of the stator, and reducing the pressure loss of gas flowing in the generator; compared with a traditional cooling mode, the generator improves the cooling effect, and the design that the ventilation pipe is located at the bottom of the stator core trench has low electromagnetic influence on the stator.