107results about How to "Save volume and space" patented technology

The invention discloses a method in a boat control field and especially relates to the sliding mode-reverse step double loop trace tracking control method of an underactuated unmanned surface vehicle.The method comprises the following steps of firstly, establishing a three-degree-of-freedom motion mathematical model of the heading, the surging and the swaying of the unmanned surface vehicle; then, through an integrated pose sensor, measuring the current position information of the unmanned surface vehicle, combining the real-time position and the reference trace of the unmanned surface vehicle, calculating an error under a boat body coordinate system; and then, designing a kinematic loop trace tracking controller based on a backstepping method, and designing a dynamic loop trace trackingcontroller based on a sliding mode control algorithm. Through a sliding mode-reverse step double loop trace tracking controller, the trace tracking control of the unmanned surface vehicle Is realized,the unmanned surface vehicle can track a linear trace, and the stability and accuracy of unmanned surface vehicle navigation can be increased.

The invention relates to an electronic cigarette which comprises a cigarette rod, an atomizer and a cigarette holder. The cigarette rod, the atomizer and the cigarette holder are connected in sequence. A switch button and a display screen are arranged outside the cigarette rod. A battery assembly, a signal acquisition module, a circuit board, an acceleration sensor and a central processing unit are arranged inside the cigarette rod. The switch button and the display screen are electrically connected with the circuit board. The signal acquisition module is in communication connection with the display screen. The central processing unit is in communication connection with the acceleration sensor. The information acquisition module outputs the electric quantity and voltage information of the battery assembly through the display screen, information is visual and concise, and electronic charging time can be accurately controlled; the acceleration sensor is adopted, the acceleration sensor sends out different electric signals through different shaking frequencies, and the central processing unit controls the display screen to display different kinds of information according to different electric signals so as to achieve the information interface switching effect; no display screen switching push button needs to be added, the display screen is switched on or switched off in a shaking mode, and operation is convenient.

The invention discloses a winch hydraulic system controlling a guide rope through stepless speed regulating constant tension, and relates to the field of tension controlled winch hydraulic systems. The system comprises a fuel tank, a motor, a volume adjustable hydraulic pump, a one-way valve, a high-pressure overflow valve, a backpressure overflow valve, a motor operating valve bank, a winch motor, a brake oil cylinder, a plate-type overflow valve, a proportional overflow valve, a first threaded cartridge shuttle valve, a second threaded cartridge shuttle valve, a two-position two-way normally-closed ball valve, and a two-position three-way electromagnetic ball valve. The system can realize stepless speed regulation and constant tension control requirement of a guide cable winch, and can solve problems of power loss caused by high-pressure overflow in a conventional hydraulic winch constant tension control system, so as to save energy resources and improve efficiency of a hydraulic system. The system is designed by using an integrated valve block, and the design reduces volume space the system occupies, and reduces the number of system pipelines, and reduces failure rate. The system is convenient to install and maintain, and can realize batch and standardized production.

The invention discloses a multi-media modular integrated cooling unit for vehicles. It includes a radiator, an installation frame and a fan. The installation frame is equipped with at least four types of radiators using different cooling media, including a condenser for an automobile air conditioner, a water tank, an air intercooler, and an oil cooler. Each radiator is provided with inlet and outlet interfaces for connection with the service system, and the installation frame is provided with positions for placing the inlet and outlet interfaces of each radiator. An installation cover is also equipped on the side of the installation frame, and the installation cover is installed There is an electronic fan. The beneficial effect of the present invention is that it occupies less volume space of the car, and the installation is more compact; it has a variety of cooling media for the heat dissipation system of the vehicle, which satisfies the heat dissipation of the automobile air conditioning heat dissipation system, the heat dissipation of the engine water tank, the oil cooling system, and the intermediate cooling system. The performance requirements of the system, etc.; the unit also has a variety of automotive heat dissipation components, which reduces the purchase cost of the entire vehicle.

The invention relates to a mobile terminal display structure and a mobile terminal. The display structure comprises a terminal front shell and a display module, wherein the display module comprises a display screen, an adhesive layer and a glass panel which are sequentially stacked; the display screen is formed by stacking multiple display components; the terminal front shell comprises a first frame and a second frame which are located on the two sides of the display module respectively, and back plates in the display components are matched with the first frame and the second frame to form an integral structure similar to an H shape. According to the mobile terminal display structure, extension of a frame structure fixing the display screen is converted and combined into the frames on two sides, and the frame structure is saved; meanwhile, the volume size of the frame is reduced, the dispensing distance between the frame structure and the terminal front shell is reduced, and accordingly the assembly mode of a traditional display module is changed, the screen ratio is increased, the purpose that no frame exists or an ultra-narrow frame is arranged is achieved, and better visual enjoyment is brought for users.

Disclosed are a secondary-pressurizing energy-saving water-supply system for a high-rise building and an energy-saving water supply method. The secondary-pressurizing energy-saving water-supply system for the high-rise building comprises a valve, a main water inlet pipe, a mainstream flow sensor, a mainstream pressure sensor, a tee joint, an ejector, an auxiliary pressure sensor, a water pump, a first one-way valve, a control box with a controller, a virtual high-level water tank, a second one-way valve, a first electric adjusting valve, a second electric adjusting valve, an auxiliary flow sensor, a surge tank and a user pipeline which are connected mutually. The structure of the ejector is optimized, the technique of the virtual high-level water-tank is adopted, and the energy-saving water supply method is free in energy input, so that the rate of energy recovery of water in a municipal water pipe network is greatly increased, power consumption of the main pump is reduced by 10-35%, the energy is saved, the stability and security is improved and energy conservation and environmental friendliness are achieved significantly.

The invention discloses a hydrolysis hydrogen production agent which at least comprises borohydride, metal catalysts and acid catalysts, wherein the metal catalysts comprise one or more of CoCl2, Co-B, FeCl2, NiC12 and CuCl2; the acid catalysts comprise one or more of citric acid, oxalic acid and phosphoric acid. The metal catalysts and the acid catalysts, namely two different types of catalysts, are mixed, a reaction between the catalyst mixture and borohydride is performed according to a certain formula, and water absorbents and a leavening agent are added into the formula, so that the catalyst mixture has the characteristics of being porous in appearance, large in specific surface area, high in catalytic activity and the like, the service life of the catalyst mixture is greatly prolonged, and the hydrogen yield and the hydrogen production rate are comprehensively improved; the defects in the borohydride-based hydrolysis hydrogen production rate and yield are overcome; besides, according to the formula for hydrogen production, the energy density of a portable hydrogen fuel battery can be enhanced, and the application prospect in the portable hydrogen production field is very wide.

The invention relates to a compound N-(4-(butyraldehyde-4-yl)-benzoyl)-L-glutamic acid dimethyl and a method which uses the compound to prepare anti-cancer drug pemetrexed. The preparation method for pemetrexed has simple post-reaction processing and high product purity, which is conducive to industrial production.

The invention provides a piezoelectric micro-thruster comprising an air inlet (1), a housing (2), a power interface (3), a filter (4), a return spring (5), a valve core (6), a piezoelectric stack (7), a washer spring (8), a valve seat (9), a seal ring (10), an adjusting ring (11), a base (12) and a nozzle (13). In the case of power-off, the surface of the valve core (6) is tightly attached to the surface of the valve seat (9) and the surface of the adjusting ring (11), and the piezoelectric micro-thruster is off; in the case of power-on, the piezoelectric stack (7) deforms to drive the valve core (6) to move, the surface of the valve core (6) separates from the surface of the valve seat (9) and the surface of the adjusting ring (11), the piezoelectric micro-thruster is on and generates thrust. The sealing parts, such as the valve core (6), the valve seat (9) and the adjusting ring (11), are all made of metal, thus the piezoelectric micro-thruster is metal sealed. The piezoelectric micro-thruster is short in response time, continuously adjustable in thrust, low in power consumption and long service, meets the strict requirements of miniature satellites and missile precision guides for micro-thrust systems and is light in weight and small in size, and more weight and space are saved for the miniature satellites.

The invention discloses an embedded piezoelectric drive micro oil spraying lubrication device, relates to the technical field of space lubrication and piezoelectric micro spraying, in particular to the embedded piezoelectric drive micro oil spraying lubrication device, and aims to solve the problem of difficult realization of micro redundancy oil supply replenishing lubrication in a traditional space liquid lubrication system. The embedded piezoelectric drive micro oil spraying lubrication device comprises a mandrel, a front micro spraying cover, a front guide ring, a back micro spraying cover, a back guide ring, two micro spraying cavities, two piezoelectric vibrators and four metal discs; two micro spraying cavities respectively sleeve the front and back ends of the mandrel; two circular grooves are symmetrically formed in the small end surface of each micro spraying cavity in the radial direction; one metal disc is embedded in each circular groove; micro holes are formed in the centers of the metal discs; the piezoelectric vibrators are respectively arranged between the front micro spraying cover and the micro spraying cavity at the front end as well as between the back micro spraying cover and the micro spraying cavity at the back end; and cavities are formed between the front micro spraying cover and the piezoelectric vibrator at the front end as well as between the back micro spraying cover and the piezoelectric vibrator at the back end. The embedded piezoelectric drive micro oil spraying lubrication device is used for space lubrication.

The invention discloses a disc solid laser amplifier, comprising a disc crystal unit, a reflection unit, a right-angle reflector and 2n reflection focusing units. Each reflection focusing unit is composed of a lens and a right-angle prism. A focus of the lens in each reflection focusing unit is overlapped mutually. Two reflection focusing units form a pair. The axes of the lenses are symmetric about a normal of a disc crystal center. The center of the disc crystal unit is located at the overlapped focus of each reflection focusing unit. The reflection unit is located around the reflection focusing units and is used for importing or exporting light. The right-angle reflector is located between the lenses and the right-angle prisms in the reflection focusing units. Included angles between two optical reflection surfaces of the right-angle reflector and the inclined surfaces of the right-angle prisms are 45 degrees. According to the disc solid laser amplifier, seed light is amplified through the serially connected disc crystals and lens-right-angle reflector combinations, so the technical problem that in the prior art, the amplification times of the seed light is low and the beam quality is low is solved.

The invention discloses an epidemic prevention robot based on infrared temperature measurement and sound screening and a detection method. The epidemic prevention robot comprises an inspection robot,a wireless charging station and a monitoring center server. The inspection robot comprises a chassis box body, the chassis box body is provided with a lithium battery, a wireless charging module, a communication module, a GPS and inertial navigation module, a motor and driving control module, a core processing module, an ultrasonic obstacle avoidance sensor, an emergency stop button, a wired charging interface and a power receiving panel, and a middle box body is mounted at the top of the chassis box body; a lifting mechanism, a lifting mechanism driving motor, two six-degree-of-freedom mechanical arms and a display are arranged on the middle box body; and the wireless charging station comprises a charging parameter detection module, a charging management module, a wireless communication module, a power conversion module, a power supply panel and an environment monitoring, positioning and navigation unit. According to the epidemic prevention robot, an inspection robot technology and atemperature measurement and epidemic prevention technology are combined, a deep learning technology is applied, body temperature and sound detection and screening are conducted, and intelligent epidemic prevention screening is achieved.

The invention discloses a bag sealing device for instant noodle processing. The bag sealing device comprises a bag sealing chamber. A conveying belt is arranged at the lower portion in the bag sealingchamber. A bag sealing clamp is arranged on the conveying belt, a driven transmission roller is arranged at the left end of the conveying belt, and a driving transmission roller is arranged at the right end of the conveying belt. The driven transmission roller and the driving transmission roller are fixed in the bag sealing chamber through supports. A transmission wheel is arranged on the outer side of the driving transmission roller, and the transmission wheel is rotationally connected with a drive device below the right end of the conveying belt. A vacuum pumping device is arranged on the left side of the upper portion of the bag sealing chamber, a first fixing plate is arranged on the right side of the vacuum pumping device, and the first fixing plate is located in the middle of the upper portion in the bag sealing chamber. Hydraulic cylinders are symmetrically arranged below the first fixing plate. The lower portions of the hydraulic cylinders are connected with a second fixing plate through telescopic rods. Pressing wheels are symmetrically arranged on the left side and the right side below the second fixing plate. The product is diverse in structure, the bag-sealing sealingeffect is good, the production efficiency is high, and popularization is facilitated.

The invention belongs to the technical field of headphones, and particularly relates to a foldable headphone. The foldable headphone includes an arc-like head band, earphone units arranged on two sides of the head band, two end parts of the head band are each provided with a connecting structure, and each earphone unit is rotatably connected with the connecting structure of the same side and can rotate towards an area that the head band surrounds; the head band includes a flexible head strip at an inner side and a steel sheet at an outer side, distance is reserved between a middle position of the flexible head strip and a middle position of the steel sheet, an end part of the steel sheet is fixedly connected with the connecting structure, and an end part of the flexible head strip is hinged to the connecting structure in a width direction. Each earphone unit includes a support one end of which is rotatably connected with the end part of the connecting structure, an earphone arranged on an inner side face of the support and an electrical connecting line, and the electrical connecting line is embedded in the flexible head strip. The foldable headphone can ensure bending strength and can also ensure wearing comfort of a head top part, and volume space can be effectively reduced when the headphone is folded, and thus the headphone is convenient to carry.

The invention provides a fluorescent rotating wheel heat dissipating module of a laser projection system. The fluorescent rotating wheel heat dissipating module of the laser projection system comprises a fluorescent rotating wheel, multiple air guide holes and blades. The fluorescent rotating wheel is provided with a first surface and a second surface opposite to the first surface. An outer fluorescent ring is arranged on the periphery of the first surface. The air guide holes penetrate through the first surface and the second surface of the fluorescent rotating wheel. The blades are arranged on the second surface of the fluorescent rotating wheel and are provided with an air inlet and first air outlets. A laser source of the laser projection system is projected at a fixed point on the outer fluorescent ring, when the fluorescent rotating wheel rotates, the blades guide airflow to enter from the air inlet of the blades, part of the airflow flows out from the first air outlets of the blades laterally, part of the airflow passes through the second surface via the air guide holes to flow to the first surface, and then heat dissipation is carried out on the fluorescent rotating wheel and the outer fluorescent ring.

The invention relates to the field of automobile engines, in particular to an automobile engine camshaft which is characterized by comprising a main oil gallery in an axial direction and a partition member used for partitioning the main oil gallery into an open cavity and a closed cavity and arranged in the main oil gallery positioned at a first shaft neck of the camshaft, wherein an oil path communicated with a phaser is arranged on the camshaft at the open cavity end, an oil inlet hole communicated with the main oil gallery is arranged at the first shaft neck at the closed cavity end, and the cam shaft and other shaft necks matched with bearing covers are all provided with auxiliary oil galleries communicated with the main oil gallery. Because the camshaft is provided with lubricating oil galleries in per se and lubricating oil of the camshaft is supplied by the first bearing cover, the automobile engine camshaft reduces the quantity of the oil galleries arranged on a cylinder cover, lowers the machining difficulty and has the advantages of cost saving, improvement of the working efficiency, compact structure and reduction of the volume space of engines and weight reduction.

The invention discloses a computer input unit with dual-spectrum and dual-coordinate output, a dual-spectrum data input processing method and a sensor thereof. The computer input unit comprises a first luminous source, a second luminous source and a sensing module, wherein the first luminous source is used for generating a first projection light beam with first wavelength; the second luminous source is used for generating a second projection light beam with second wavelength; and the sensing module comprises a filtering unit, a light signal receiving zone, a control unit and a storage unit, the filtering unit respectively filters the first projection light beam with first wavelength and the second projection light beam with second wavelength, the light signal receiving zone receives the first projection light beam to obtain first image data and receives the second projection light beam to obtain second image data, the control unit compares the obtained first image data with the obtained second image data so as to figure out first displacement data and second displacement data, and the storage unit stores the first displacement data and the second displacement data.

The invention discloses a housing of a cylindrical lithium ion battery pack. The housing comprises a lower cover (3), wherein the cylindrical lithium ion battery pack (4) is arranged at the top of the lower cover (3) and covered by a hollow upper housing (1); the bottom of the upper housing (1) is open; the upper housing (1) and the lower cover (3) are fastened; a plurality of connecting bumps (31) are arranged at intervals on the peripheral edge of the top of the lower cover (3); a threaded hole (32) is formed in the outer side surface of each connecting bump (31); a plurality of screw through holes (11) are formed in the positions, corresponding to the threaded holes (32), of the upper housing (1); a countersunk screw (2) is arranged in each screw through hole (11) in a penetration manner; and the countersunk screws (2) are in threaded connection with the threaded holes (32). According to the housing, a gap formed when cylindrical batteries are combined can be fully utilized, the volume of the assembly structure of the screws is reduced, and the volume space of the battery pack is saved.

The invention relates to the technical field of computer information, and provides a method, system and device for achieving multiple partitions and multiple disk identifiers on the basis of a single disk. According to the method for achieving multiple partitions and multiple disk identifiers on the basis of the single disk, file management of a multi-user multi-attribute storage device is achieved, different levels of permissions are open to different levels of users, file management of multiple users and the openness of the system are improved, the experience degree of the users is greatly improved, and the technical problem of achieving multiple partitions, multiple disk identifiers and multiple attributes on the basis of the microprocessor single disk is solved. Meanwhile, compared with a technique of building a multi-partition interface in a Linux or wince system on the basis of a high-level ARM processor, single-disk multi-partition multi-disk identifier mapping can be achieved, the hardware cost of a product is greatly reduced, the product size space is decreased, and the competitive power of the product in the same trade is improved.

An air conditioner and water heater all-in-one machine comprises plate-fin reverse flow thin passage heat exchanger, a throttling device, a compressor, a four-way electronic valve, an air side heat exchanging device, a circulating pump, a three-way electronic valve I, an air conditioner terminal electronic valve, a three-way electronic valve II, an air conditioner terminal and a hot water circulating tank. The fluid inlet in one side of the plate-fin reverse flow thin passage heat exchanger is connected with the four-way electronic valve, and the fluid outlet of the plate-fin reverse flow thin passage heat exchanger is connected with the throttling device. The fluid outlet in the other side of the plate-fin reverse flow thin passage heat exchanger is connected with the circulating pump which is connected with the three-way electronic valve I. The three-way electronic valve I is connected with the air conditioner terminal electronic valve and the hot water circulating tank. The air conditioner terminal electronic valve is connected with the air conditioner terminal. The air conditioner terminal is connected with the three-way electronic valve II which is connected with the fluid inlet in the other side of the plate-fin reverse flow thin passage heat exchanger and the hot water circulating tank. The hot water circulating tank is connected with a water inlet electronic valve. The air conditioner and water heater all-in-one machine is simple in structure, low in investment and high in heating and refrigerating efficiency.

The invention provides a single-wheel multi-blade upright wind paddle-type wind wheel for wind power generation, which has high efficiency and is not influenced by an air flow direction. The single-wheel multi-blade upright wind paddle-type wind wheel consists of paddle wings, a paddle arm, a wind wheel shaft and a bracket, and is characterized in that the paddle wings are parallel to the wind wheel shaft, and are fixedly connected with the wind wheel shaft through the paddle arm; more than two paddle arms are arranged; the heads of the paddle wings are in outward-bent circular arc shapes; the middle parts of the paddle wings are planes; and the tails of the paddle wings are bent inwards. The single-wheel multi-blade upright wind paddle-type wind wheel can generate more balanced directed power without being influenced by the flow direction, improves the wind power efficiency and reduces the self anti-resistance of the own energy consumption simultaneously, has a small volume space, and is widely suitable for wind power generation or wind power generation small household equipment.

The invention discloses a horizontal permanent magnetic mechanism breaker. The breaker comprises a frame, vacuum switch tubes arranged on the frame in parallel, two permanent magnetic driving mechanisms with push rods, a rotation shaft, two separating brakes and six breaking-closing brake crank arms. The push rods of the permanent magnetic driving mechanisms are horizontal and are vertical to the moving directions of moving and static contact breaking-closing brakes of the vacuum switch tubes to form a horizontal structure. The rotation shaft is arranged in the frame in a rotatable mode, the middle ends of the crank arms are sleeved and fixed on the rotation shaft, the lower ends are in rotatable connection with the push rods of the permanent magnetic driving mechanisms through hinge pins, and the upper arms are connected with the bottom ends of insulation pull rods through hinge pins. The vacuum switch tubes are arranged along the plumb line directions, the static contacts are arranged on the upper portions, and the movable contacts are arranged on the lower portions. The portions of the static contacts, which stretch out of the top ends of vacuum switch tube casings are fixed with and electrically connected with upper power connection plates. By means of the breaker, the whole height can be reduced effectively, and the breaker is in accordance with the miniaturization development trend.

The invention discloses an online degritting device at the bottom of a horizontal-type oil-gas-water three phase separator and a degritting method. An oil-bath clapboard is arranged in the horizontal-type oil-gas-water three phase separator and divides the horizontal-type oil-gas-water three phase separator into an oil-water separation area and an oil collecting area. The online degritting device is arranged at the bottom of the horizontal-type oil-gas-water three phase separator and correspondingly located in the oil-water separation area. The online degritting device comprises a water inlet pipe, a plurality of grit-separating plates, at least one grit-collecting plate, at least one flow-stabilizing plate and a grit-absorbing pipe. According to the device, the functional modules are tightly matched, and the device occupies a small volume space of the three phase separator; and the device has small influence on the oil-gas-water normal separation process in the separator, online clearing of solid impurities in the separator and automatic control over the process can be achieved, manpower interference cost is reduced, and production efficiency is improved.

The invention relates to the field of an illumination lamp. A street lamp comprises a lamp housing, a connecting tube and an LED (light emitting diode) luminous assembly, wherein the LED luminous assembly comprises a plurality of groups of LED modules and connecting devices, the adjacent LED modules are connected through corresponding connecting device, each connecting device comprises a fixing element and an electric connector, the adjacent LED modules are connected through corresponding fixing elements, positions of connecting the fixing elements onto each group of LED modules are respectively positioned on a connecting assembly, and PCB (printed circuit boards) arranged on the adjacent LED modules realize the electric connection through the electric connector. The street lamp has the advantages that the structure is novel, the LED modules can be freely combined, i.e., the brightness of the street lamp can be freely regulated, and the waterproof performance is good.

The invention provides a high-efficient water purifier, which comprises a shell, and a drive pump, a first three-way valve, a control unit and a plurality of reverse osmosis membrane filters arranged in the shell. The reverse osmosis membrane filters are arranged in parallel; a water body to be purified is introduced by the drive pump, purified and treated through the reverse osmosis membrane filters, and then flows an inlet of the first three-way valve; the control unit is electrically connected with the drive pump and the first three-way valve. According to the high-efficient water purifier provided by the invention, the reverse osmosis membrane filters in parallel are adopted to filter and purify the water body, so that the water purifier is ensured to have enough water yield, meanwhile, the overall dimension of the water purifier is compressed into a cabinet, and the daily drinking water flow requirement and the installation dimension requirement of families are completely met. Meanwhile, when the first three-way valve takes water, stale drinking water remained in a pipeline is firstly discharged, so that a TDS (Total Dissolved Solids) value in the drinking water is reduced, and the water quality and the safety standard of the drinking water are improved. On the basis, the invention also provides the cabinet.

The embodiment of the invention discloses an RF module which comprises an RF module shell and a handle, wherein the handle comprises a first handle base, a second handle base and a handle grip, wherein the first handle base and the second handle base are arranged on the RF module shell, and the handle grip is movably connected with the first handle base and the second handle base. The embodiment of the invention also discloses a handle. The handle grip is movably connected with the first handle base and the second handle base, and the space occupied by the handle in a hiding state is small, so the volume space of the RF module occupied by the handle can be reduced.

The invention discloses a stud welding laser locating system. The stud welding laser locating system comprises a multi-axis robot. One end of the multi-axis robot is fixedly arranged, a mounting baseis arranged at the other end of the multi-axis robot, and a laser position sensor and stud welding guns are arranged on the mounting base. The mounting base is connected with the multi-axis robot through a terminal rotary shaft, and the laser position sensor and the stud welding guns are arranged in the radial direction of the terminal rotary shaft. The multiple stud welding guns are used for welding studs of different specifications. The invention further discloses a working method of the stud welding laser locating system. According to the stud welding laser locating system and the working method thereof, before the studs are welded, supplied workpieces are subjected to laser locating, and the welding positions of the studs can be corrected according to deviations of inner borders of thesupplied workpieces.

The invention discloses an electric bicycle controller. The advantages of the controller are that the controller has a miniaturization design and lower demands of installation space, terminals and lead wires are improved, automatic welding can be completely realized, the controller adopts a buckle type shell design and the assembly efficiency of the controller can be enhanced. The controller includes an upper cover of a shell, a lower cover of the shell, an upper plate of a circuit board, a lower plate of the circuit board, connecting terminals between plates, a power tube, lead terminals anda heat conduction material. The upper cover of the shell is connected and embedded to the lower cover of the shell through a buckle structure; the upper plate of the circuit board and the lower plateof the circuit board are in mechanical connection and electric connection through the connecting terminals between plates; the lower plate of the circuit board adopts an aluminum substrate structure;and the heat conduction material is filled between the lower plate of the circuit board and the lower cover of the shell, and the lower plate of the circuit board being fixed on the lower cover of theshell through bolts.