46results about How to "Improve overheating" patented technology

The invention discloses an energy-saving efficient plastic granulator, a feeding screw rod is rotationally arranged in a feed barrel, a scraper plate is rotationally arranged in a granulation extrusion cavity, a scraping block is arranged on the excircle of the scraper plate, the scraping block is closely attached to the inner cylinder wall of an extrusion die cylinder, the cylinder wall of the extrusion die cylinder is provided with extrusion holes, and a rotational cut-off tool is arranged on the outer cylinder wall of the extrusion die cylinder; the energy-saving efficient plastic granulator is characterized in that: the inner cylinder wall of the feed barrel is provided with a plurality of vertical ribs, the vertical ribs pass through, from up to down, the whole feed cylinder height, the top circle of the vertical ribs is matched with the excircle of the feeding screw rod, adjacent vertical ribs, and the inner cylinder wall of the feed barrel and the excircle of the feeding screw rod enclose a space to form an inner air circulation channel of the feed barrel. The energy-saving efficient plastic granulator uses the scraping block to grind a material to produce heat to melt the material for plastic granulation, the energy-saving efficient plastic granulator can always smoothly exhaust in the working process, and the unique scraper plate is designed to avoid local overheating of the material so as to avoid obstruction of heat transfer, so that automatic control of blanking and feeding can be achieved, and the entire normal high-speed granulation process and high granulation quality can be ensured.

The invention discloses a display device with heat dissipating structures and an electronic device using the same. The display device includes a panel, a backlight module, a back cover, a rim frame and a plurality of thermal fins. The backlight module provides the panel with a light source and includes a light emitting unit and a light guide plate. The light emitting unit emits light, and the light guide plate is disposed below the panel for guiding the light emitted by the light emitting unit to the panel. The back cover is installed on an outer side of the panel and the backlight module. The rim frame combines the back cover for covering the panel and the backlight module cooperatively with the back cover. The plurality of thermal fins is disposed on the rim frame for dissipating heat conducted from the rim frame and generated by the light emitting unit.

The invention discloses a linear switching constant-current LED drive circuit for control over peak current, and relates to the field of power source drive circuits. Compared with an existing linear constant-current LED drive circuit, and according to the linear switching constant-current LED drive circuit for control over the peak current, an integrating capacitor is connected to a loop of a drive chip in parallel, and average current passing through an LED lamp bead can be kept to be constant through the integrating constant-current mode; in addition, due to the fact that a loop formed by an operational amplifier, a switching selector and a high-voltage power MOS is added to the loop of the drive chip to limit the peak current passing through the LED bead, useless power consumption of a system can be reduced, working efficiency of the system can be improved, heat produced in the working process of the drive chip is reduced, the required rated current of the LED bead can be effectively reduced, the luminous efficiency of the LED bead is improved, the luminous decay of the LED bead slows down, the service life of the LED bead is prolonged, and cost of the system is reduced.

A printed circuit board is provided. The printed circuit board includes N power layers and a first via group. The N power layers are arranged in parallel and spaced from each other. The first via group includes M rows of vias which are disposed through the N power layers, where N and M are positive integers greater than 0. Each row of the M rows of vias is electrically connected to the first layer of the N power layers. A Pth row of the M rows of vias is further electrically connected to Q power layers of the N power layers respectively, wherein Q is the smallest positive integer greater than or equal to P((N-1) / M), and P is a positive integer less than or equal to M.

The invention discloses a wet clutch friction plate with a bionic oil groove structure, and belongs to the technical field of automobile clutch friction plates. The wet clutch friction plate consists of a core plate and friction liners, wherein the two friction liners are symmetrically and fixedly connected with the front side and the back side of the core plate; radial oil grooves and annular oil grooves are formed in surfaces of both two friction liners; bionic micro structures consisting of guide grooves and bionic unit grooves are arranged at the bottoms of the oil grooves. Therefore, by adopting the wet clutch friction plate, an excellent one-way conveying guide function on cooled lubricating oil can be achieved, the flowing speed of the lubricating oil in the oil grooves can be effectively increased, heat convection between the lubricating oil and the friction plate can be improved, and surface temperature increase of the friction plate can be remarkably reduced; due to the combination of the radial oil grooves and the annular oil grooves, a unique composite oil groove mode can be achieved, failure situations such as over heat and deformation caused by concentrated heat stress on the surface of the friction plate can be alleviated, the performance of the friction plate can be comprehensively improved, and the service life of the friction plate can be prolonged.

The piezoelectric precision spraying device of the present invention, the driving body includes piezoelectric ceramics connected to each other and a lever amplification mechanism, and the lever amplification mechanism amplifies the micro-displacement generated by the expansion and contraction of the piezoelectric ceramics under the action of an electric field to a specified stroke, and also includes A channel carrier, the channel carrier is provided with a cavity seat, and the cavity seat is provided with a liquid cavity and an air cavity, and the liquid cavity and the gas cavity are respectively connected with the liquid channel and the gas flow channel opened on the channel carrier. The channel is connected, the lever amplifying mechanism is connected with a push rod, and the push rod extends into the liquid cavity, and the bottom of the liquid cavity communicates with the nozzle. The purpose is to provide a piezoelectric precision spraying device with simple structure, low use cost, low installation and adjustment difficulty and high spraying precision.

The invention discloses a construction method of a permanent magnet hub motor energy composite controller for an electric vehicle. The composite controlled object is composed of a permanent magnet hub motor, a temperature measurement module, and a rotation speed and electrical angle calculation module. The PARK transformation module, the CLARK transformation module and The PWM inverter modules are connected in series to form a composite inverter control module. The intelligent heat control module is composed of a temperature setting module, a heat calculation module, a heat regulation module, a heat PI regulation module, and a current conversion module connected in series. Module, coordinate transformation module, torque error calculation module, reference torque calculation module, torque estimation module, target torque given module, PI adjustment module, phase angle update module and current conversion module together constitute a composite temperature control torque module , to measure the temperature of the in-wheel motor itself to feedback and adjust the running state of the motor, and the compound temperature control torque module and the thermal control module are jointly regulated to realize temperature and torque control.