31results about How to "Guarantee normal work" patented technology

The invention relates to an elemental analyzer and in particular relates to a laser ablation flight time mass spectrum analyzer and a laser-induced breakdown light spectrum analyzer. An analyzer for synchronously measuring in-situ laser mass spectrum and light spectrum is mainly characterized in that a target sample is arranged a cross point of a laser beam of a laser optical system, a central axis of a laser flight time mass spectrum measuring device and an axis of a lens set of a laser induced breakdown light spectrum measuring device, wherein the laser optical system comprises a laser device; an ultraviolet quartz prism, an ultraviolet quartz focusing lens and a high characteristic wavelength reflector are arranged on a laser beam transmitting channel; each laser pulse is focused on the surface of the target sample and used for generating a plasma plume; in order to accurately control the laser beam focusing position, a monitor CCD and a target sample positioning semiconductor laser device are also arranged at the front end of a vacuum chamber of the laser flight time mass spectrum measuring device; the target samples are respectively arranged on two sides of a target sample axis, an axis of the CCD and an axis of the positioning semiconductor laser device. The analyzer for synchronously measuring the in-situ laser mass spectrum and light spectrum has the advantage that information of the mass spectrum and the light spectrum of ablation products can be obtained under the same ablation condition by ablating target materials under the same condition by virtue of the same beam of laser.

The invention relates to a moving-iron type linear motor coil array power-driven allocation method, which comprises the steps of; dividing a rectangular stator coil array of a moving-iron type linear motor into n partition areas, wherein each partition area is divided into an operating condition area and a transition condition area; determining and the total number of power drivers according to the number of coils in each partition area to form a driver array; and connecting the driver array with the stator coil array through a switchgear, and ensuring that each driver is connected with the coil at the corresponding position in each partition area through the switchgear. The method determines the coverage area of the coil array according to a position at which a rotor magnetic steel array is positioned, and controls the on / off and the current of the coils by utilizing the limitation of the transition condition area so as to realize the large stroke linear motion of the rotor. The method can solve the problems of complex structure and expensive total cost of driver equipment which are caused by excessive drivers caused by multiple number of the stator coils.

The invention aims to provide a method and a device for assessing a junk information mining rule. The assessing device is used for obtaining the to-be-assessed mining rule and an information publish sample for assessing the mining rule, then, the mining rule is used for conducting junk information mining for the information publish sample, and at least one evaluation parameter corresponding to the mining rule is obtained. Compared with the prior art, according to the fact that at least one evaluation parameter corresponding to the to-be-evaluated mining rule is obtained, an index for assessing the mining rule is provided for an interactive platform manager, the mining rule is further optimized and updated to improve various evaluation parameters, junk information is accurately judged and processed by an interactive platform, and therefore normal work of the interactive platform is guaranteed.

The invention provides a starting circuit with low conducting voltage drop. The input voltage can be detected in real time; when the detected input voltage is lower than a set voltage value, an N-MOStube is switched on, so that the difference between the output voltage and the input voltage of the starting circuit is extremely low, and it is ensured that the starting voltage of a post boost circuit follows the input voltage basically; and when the detected input voltage is higher than the set voltage value, a voltage limiting circuit works, and the output voltage of the starting circuit is limited within the range of working input voltage of the post circuit.

The invention relates to the field of PE pipes, and particularly relates to a PE pipe bending device facilitating packaging. The PE pipe bending device comprises a base, a bending mechanism, a cleaning mechanism, a storage mechanism, a limiting mechanism, a positioning mechanism and a swing mechanism. A fixing plate is installed through the base, and therefore the bending mechanism can be conveniently fixed and work, and PE pipes can be conveniently rolled and stored; meanwhile, the bending mechanism is locked in an abutting manner under the action of the limiting mechanism, and normal work ofthe bending mechanism is guaranteed; under work of the positioning mechanism, the PE pipes in the bent and rolled process can be conveniently positioned and guided, and the PE pipes can be conveniently stored and bent; meanwhile, the swing mechanism is driven by the bending mechanism to work, the positioning mechanism slides, and the PE pipes can be conveniently stored in order and in layers; andafter the cleaning mechanism cleans the PE pipes in the sliding process, dust and sundries attached to the side walls of the PE pipes are cleaned away, the cleaned dust and sundries fall into the storage mechanism to be stored, and meanwhile subsequent cleaning is facilitated.

A screw squeezing type juicer comprises a base, a container shell and an upper cover. The container shell is assembled on the base, the upper cover is assembled on the container shell, a driving mechanism is arranged on the base, a feed inlet is arranged on the upper cover, a liquid outlet and a residue outlet are arranged on the container shell, a screw and a filter screen are arranged in the container shell, a juice collecting cavity is formed between the filter screen and the container shell, and a juicing cavity is formed between the screw and the filter screen; a rotary shaft is arranged in the center of the screw and is connected with a power output shaft of the driving mechanism; the liquid outlet is communicated with the juice collecting cavity, and the residue outlet is communicated with the bottom of the filter screen; and a residue discharge channel is arranged at the bottom of the container shell, residue pushing teeth which extend into the residue discharge channel are arranged at the bottom of the screw, and a residue discharge outlet of the residue discharge channel is communicated with the juice collecting cavity. The screw squeezing type juicer has the advantage that residues can be prevented from being accumulated on the lower side of the screw.

The invention provides a structure of a heat transfer element, i.e. thermal column and a manufacturing method thereof. Stamping or extrusion is utilized to prepare pure copper metal barrel and a base plate; the inner cavity of the thermal column is provided with various capillary structures, such as sintered copper powder, copper nets, grooves and the like; after being sintered, the capillary structures are assembled to cause capillary tissues in the cavity to be fully communicated, and the thermal column is obtained by welding, injection and vacuum degassing. The invention can effectively solve the problem of working medium backflow and blockade in the processes of liquid heat transfer medium evaporation and condensation phase change so as to greatly improve heat transfer performance; asthe heat radiation core element, the thermal column can satisfy the operating requirements on high heat dissipation power and light weight of computer microprocessors, large-power LED illumination and integrated circuit radiators.

The invention provides an RTC (real time clock) power management device which is applicable to an RTC system of equipment and comprises an equipment power supply circuit, a battery power supply circuit, an RC charging and discharging circuit and an MCU (micro-control unit). The equipment power supply circuit is respectively connected with the battery power supply circuit and the RC charging and discharging circuit, the RC charging and discharging circuit is connected onto a connecting wire for the equipment power supply circuit and the battery power supply circuit, a connecting point A connected with an RTC chip U1 power supply end is formed on the connecting wire, and the equipment power supply circuit, the battery power supply circuit and an RTC chip are controlled by the MCU. The invention further provides an RTC power management method. The device and the method have the advantages that time of the RTC system is reset by the aid of management for a backup power supply of the RTC system and a multichannel backup power supply scheme, and the problem of RTC low voltage mistaken alarm can be automatically checked.

The invention provides a starting circuit. A voltage limiting circuit composed of a P-MOS tube circuit, a voltage stabilizing circuit or a voltage clamp circuit is used to control the range of outputvoltage, it is ensured that the output voltage is within the working voltage range of a post boost circuit of the starting circuit of a post power supply module with a super wide input voltage range.An adjustable driving circuit samples an input voltage, and it is ensured that the starting circuit does not influence post power supply due to voltage difference of the starting circuit itself duringlow-voltage work; and during high-voltage work, the output voltage is controlled within the voltage range, and it is ensured that the output voltage of the starting circuit in a working voltage interval satisfies the working voltage range of the post boost circuit. Loss of the circuit in the working state is extremely low.

The invention relates to a display device, a stretchable display panel and a manufacturing method of the display panel, and relates to the technical field of display. The stretchable display panel comprises a flexible substrate and a plurality of pixel islands and island connection lines on the flexible substrate, wherein the island connection lines connect the adjacent pixel islands; each islandconnection line comprises a first outer protective layer arranged on the flexible substrate, a first inner protective layer arranged on the surface, deviating from the flexible substrate, of the firstouter protective layer and made of an elastic hydrophobic material, a conductive layer arranged at the local part of the surface, deviating from the flexible substrate, of the first inner protectivelayer, a second inner protective layer covering the conductive layer and the first inner protective layer and made of the elastic hydrophobic material, a second outer protective layer arranged on thesurface, deviating from the flexible substrate, of the second inner protective layer, and a packaging layer covering the second outer protective layer; the Young moduli of the first inner protective layer and the second inner protective layer are lower than the Young moduli of the first outer protective layer and the second outer protective layer; and the Young moduli of the first outer protectivelayer and the second outer protective layer are lower than that of the packaging layer.

An engine net torque detecting equipment comprises an adapter front section and an adapter rear section which are respectively arranged at two sides of an adapter middle section being in a pipe structure, three sections are fixed together and the axes are coincident, the inner wall of the adapter front section, being in a pipe structure, is adapted with an oil pump installation stage on an engine crankshaft, and the adapter rear section is sleeved on a positioning post at end part of a constant torque wrench, and the axis of the adapter rear section is perpendicular to the axis of the constant torque wrench. The invention, having the characteristics of artistic design, convenient execution, simple operation, and the like, is capable of quickly, accurately performing test to net torque of the engine, thereby guaranteeing the assembly quality of the engine, preventing repeated labor caused by repeated assembly and disassembly, reducing labor intensity of workers greatly, and improving assembly efficiency of the engine effectively.

The invention relates to the technical field of power grids, and discloses a separated wire supporting tube for power transmission. The tube comprises an outer tube, and a middle tube is installed inthe outer tube, and an inner tube is installed in the middle tube. At least three matching grooves are annularly formed at the inner side of the outer tube at equal intervals, and a separated supporting plate matched with the matching grooves is integrally formed on the middle tube. According to the invention, the tube can effectively achieve the classified installation through different wire installation cavities, thereby facilitating the subsequent maintenance and improving the anti-interference capability between the wires. Moreover, the tube can protect a wire by protective gas, can maintain the temperature of the wire in the tube by providing a gas circulation function, and guarantees the normal operation of a circuit in severe weather. Moreover, the tube is simple in structure, is easy to assemble and transport, and can conveniently perform subsequent detection and maintenance of the wire, so the tube has a very high practical value.

The invention discloses a water supply control system for a pump station of a non-negative pressure water supply device. The water supply control system for the pump station of the non-negative pressure water supply device includes a steady flow compensation tank and a closing mechanism, a first water pipe is opened on one side of the upper end of the steady flow compensation tank, a filter cavityis embedded in the first water pipe, an extraction mechanism is arranged in the filter cavity, a vacuum suppressor is inlaid on the other side of the upper end of the steady flow compensation tank, asecond water pipe is fixed to the lower end of the steady flow compensation tank, a water pump unit is arranged at the other end of the second water pipe, and an electric motor is fixed to the upperend of the water pump unit. According to the water supply control system for the pump station of the non-negative pressure water supply device, through a floating ball and a first sliding block, whenwater enters the steady flow compensation tank, the floating ball at the water inlet end of the steady flow compensation tank rises with the water level in the steady flow compensation tank, a sealingplug is driven by the floating ball to move upward, the sealing plug automatically seals the water inlet port of the steady flow compensation tank, through a support rod and a connecting rod, the floating ball can be fixed to prevent the floating ball from shaking, and the steady flow compensation tank is automatically sealed.

The invention provides a manufacturing method of a novel composite thermal column. By utilizing punching or squeezing, a pure copper metal barrel body and a bottom plate are manufactured, a pluralityof capillary structures such as sintered copper powder, copper nets and trenches are arranged in an inner cavity of the thermal column; and the capillary structures are sintered and assembled to ensure that capillary tissues in the cavity body fully communicate with each other, and the thermal column is manufactured in manners of welding, liquid injection and vacuum degassing. According to the manufacturing method of the novel composite thermal column disclosed by the invention, the problems of reflux blocking of working mediums in phase change processes of evaporation and condensation of liquid heat transfer working mediums are effectively solved, and the heat transfer performance is greatly improved; as a core element for carrying out heat dissipation, the use requirements of computer micro-processors, high-power LED illumination and integrated circuit heat radiators on high heat dissipation power and light weight can be met.

The invention discloses a controller current sampling system which comprises a channel selection module, a current sampling and conditioning module and a control module, the channel selection module comprises three channel selection sub-modules; the current sampling and conditioning module comprises three current sampling and conditioning circuits; the input of each channel selection sub-module isrespectively connected with a three-phase current signal and a reference signal; the output of each channel selection sub-module is connected with the input of a corresponding current sampling conditioning circuit; the control module controls the channel gating of the channel selection module and collects a three-phase current sampling signal output by the current sampling and conditioning moduleto control a motor. The free switching and different combinations of the circuits can be realized, and when one path of the sampling system is abnormal, the normal operation of a controller can be guaranteed through channel selection and the combination of the remaining circuits capable of working normally. Meanwhile, the circuit can be self-checked through different selections of channels such that the fault reason can be quickly determined.

The invention discloses a three-phase power autotransformer, which comprises a base, a three-phase autotransformer, a housing, a mounting base and a wind dissipation device, wherein the housing sleeves the upper part of the base; the three-phase autotransformer and the wind dissipation device are arranged in a space formed by the housing and the base; the lower end of the base is fixedly connectedwith a lower cylinder; the lower end of the lower cylinder is fixedly connected with the mounting base; the upper end of the base is connected with a special-shaped slide block through a bolt in a sliding manner; the internal part of the special-shaped slide block is of a hollow structure; an upper cylinder is arranged in the hollow structure and penetrates through the special-shaped slide block;the lower end of the upper cylinder is propped against the upper end of the base; the external part of a reinforcing bushing is fixedly connected with the three-phase autotransformer; a motor is fixedly arranged in a bracket; an output end of the motor is fixedly connected with a lower gear; a lower blade is fixed on the lower gear; the lower gear is meshed with an upper gear; and the upper gearis connected with an upper blade. The three-phase power autotransformer is capable of ensuring that the generated heat is timely transferred and dissipated, is convenient to fixedly install and simultaneously has the effect of preventing dust from being scattered on the upper edge to affect use.

The invention discloses an aeration device for a rapid biochemical sewage treatment system, and relates to the technical field of sewage treatment. The aeration device for a rapid biochemical sewage treatment system comprises an air compressor, an air outlet of the air compressor is fixedly connected with the top end of an air guide pipe, a first annular pipe and a second annular pipe are arranged below the air guide pipe, the bottom end of the air guide pipe is fixedly connected with the top of the first annular pipe, an inner cavity of the air guide pipe is communicated with an inner cavity of the first annular pipe, and the axes of the first annular pipe and the second annular pipe coincide with each other. According to the aeration device for a rapid biochemical sewage treatment system, based on the arrangement of a turbulence forming mechanism, high-speed airflow can be intermittently sprayed out in the operation process of a movable air spraying mechanism, solid particles and sludge in sewage are further promoted to be away from the movable air spraying mechanism, and meanwhile, the sprayed high-speed airflow can be used as power to further enlarge the turbulence range of the water body, so that solid particles and sludge in the sewage tend to be uniformly distributed.

The invention relates to the technical field of solar power generation, in particular to a novel solar power generation control system. The system comprises a solar photovoltaic array, a current and voltage collection circuit, a DSP chip, a PWM driving circuit, a DC / DC converter, a DC / AC inverter, a DC / DC voltage stabilization circuit, a storage battery charging / discharging controller, a storage battery pack, a discharge current resistance detection circuit, a voltage detection circuit, a current detection circuit, an alternating-current load and a direct-current load. According to the system, solar energy is converted into electric energy through the solar photovoltaic array, and current and voltage parameters output by the solar photovoltaic array are collected by utilizing the current and voltage collection circuit; meanwhile, signal adjustment is realized by utilizing the DC / DC converter, the DC / AC inverter and the DC / DC voltage stabilization circuit, so that normal work of the system can be ensured; and moreover, the internal resistance value of the storage battery pack is detected by utilizing the discharge current resistance detection circuit, so that the situation that the exception of the storage battery pack cannot be discovered in time is avoided.

A frequency converter with an automatic temperature control and heat radiation function comprises a control cabinet, a cooling device, a cooling device controller, a temperature sensor and an axial flow fan. Through temperature detection of the temperature sensor to the frequency converter, the temperature sensor transmits information to the cooling device controller. The cooling device controller starts the cooling device for cooling air which enters the frequency converter, thereby performing a better heat radiation function, ensuring normal operation of the frequency converter, preventing component damage in the frequency converter, and reducing fault rate.

The invention discloses a waterproof structure of a power line outlet of a ceiling lamp. The waterproof structure comprises a frame, a light source plate and a lampshade, wherein the light source plate is installed on the frame, and the lampshade is connected to the light source plate in a covering mode. The power line outlet is formed in one end of the frame and is provided with a waterproof assembly. Through the waterproof assembly, water on a power line cannot enter the lamp, and therefore normal work of circuits inside the lamp is effectively guaranteed.

The invention discloses a battery box with a fast heat dissipation function. The battery box comprises a box body and a cover board, wherein the upper end of the box body is open; the cover board is in articulated fit with the box body; a T-shaped blind hole is formed in the side wall of one end of the box body; a slide block which is in fit with the T-shaped blind hole is arranged in the T-shaped blind hole in a sliding manner; the cover board comprises a support segment and a clamping segment; one end of the support segment is articulated with the slide block; the other end of the support segment is articulated with one end of the clamping segment; a buckle is arranged at the end part of the other end of the clamping segment through an elastic connector; a clamping groove which is in fit with the buckle is formed in the side wall of the box body; and a battery pack is fixed in the box body and is provided with an equalization system. When the support segment locally enters the T-shaped blind hole until the slide block contacts the bottom of the T-shaped blind hole while the clamping segment which is articulated with the end part of the support segment is converted into a vertical placement position from a horizontal placement position, the bottom surfaces of the support segment and the clamping segment contact each other, so that normal connection of the cover board and the box body is ensured; and meanwhile, the best perspective of observation can also be improved for an operator.

The transformer heat dissipation shell comprises a square box shell, the box shell is transversely provided with an upper heat conduction plate and a lower heat conduction plate, the left side and theright side of each heat conduction plate are each provided with a plurality of side-by-side round openings in the width direction of the box shell, and a vertical inner glass pipe perpendicular to the corresponding heat conduction plate is fixed in each round opening; the tops and the bottoms of the inner glass tubes are connected with steam tubes and return tubes correspondingly, the steam tubesand the return tubes are obliquely and upwards connected to the exterior of the box shell, and the left side and the right side of the exterior of the box shell are provided with outer glass tubes which are parallel to the inner glass tubes on the left side and the right side of the heat conduction plate and correspond to the same in terms of quantity. The ends, located outside the box shell, ofthe steam pipe and the return pipe are connected to the top and the bottom of the outer glass pipe respectively; the inner glass pipe is filled with condensate water. The shell conducts heat generatedby working of electronic components of the transformer to the inner glass tube through the heat conduction plate, condensate water in the inner glass tube absorbs heat and is vaporized into steam, and the steam is conveyed to the outside through the steam tube to be subjected to heat release vaporization and conducted to the outside.

The invention discloses a shock absorption and heat dissipation electric power cabinet for electric power engineering. The shock absorption and heat dissipation electric power cabinet comprises a cabinet body and a shock absorption base; the cabinet body is arranged above the shock absorption base; a first damping spring is arranged between the cabinet body and the shock absorption base; and shock absorption grooves are respectively formed in two sides of the upper surface of the shock absorption base; the lower side of the cabinet body is fixedly connected with supporting rods extending into the shock absorption grooves; the bottoms of the supporting rods are fixedly connected with sliding plates; sealing cavities are formed in the two sides of the interior of the shock absorption base respectively; the bottoms of the sliding plates are fixedly connected with movable rods extending into the sealing cavities; the bottoms of the movable rods are fixedly connected with large pistons; the bottoms of the large pistons are fixedly connected with reset springs; and small pistons are arranged on the two sides of the interior of each sealing cavity correspondingly. The shock absorption and heat dissipation electric power cabinet for the electric power engineering is novel in structure and ingenious in conception, has good heat-dissipating and shock-absorbing effects, can guarantee normal work of electric power equipment in the electric power cabinet, and is relatively high in practicability.

The invention discloses an anti-clamping oil well pump. The anti-clamping oil well pump comprises an oil pipe, a correcting joint hoop, correcting bodies, a pump barrel, an outer desilting pipe, a casing pipe, an oil rod, a piston, a pump seat and the like. The oil pipe is arranged in the casing pipe. The lower end of the oil pipe is connected with the outer desilting pipe trough the correcting joint hoop. The correcting bodies are arranged in the correcting joint hoop. The lower end of the correcting joint hoop is connected with the upper portion of the pump barrel through the connecting bodies and a fixing ring. The lower end of the pump barrel and the lower end of the outer desilting pipe are connected with a double-wire joint. An inner thread of the lower end of the double-wire joint is connected with the pump seat. The piston and the oil rod are arranged in the pump barrel. The lower end of the outer desilting pipe is connected with an outer thread of the double-wire joint. The pump barrel is connected with an inner thread of the double-wire joint. A piston cap is arranged on the oil rod. The anti-clamping oil well pump has the beneficial effects that scrap iron and sediment are guided into an annular space between the pump barrel and the outer desilting pipe through the piston cap, the normal work of the oil well pump can be guaranteed, the scrap iron and sediment can be collected effectively, the stuck pump fault is avoided, and the service life of the oil well pump is prolonged.

The invention discloses a full-automatic intelligent washing machine. The washing machine comprises a machine body. The machine body further comprises a control panel, a front door panel, a front door, a washing box and a base. The control panel is arranged at the lower end of the top of the machine body and is fixedly connected with the machine body. A heater, a power switch, a water inlet pipe,a water outlet pipe, a radiator, a washing drum and a heat dissipation thin slot; a spraying tube is arranged on the heater, and a control button and a display screen are arranged on the control panel; a first magnet, a hinge and a concave table are arranged on the front door panel, a second magnet and an observation window are arranged on the front door, a groove handle is arranged on a washing box, and bottom feet are arranged on the base. According to the full-automatic intelligent washing machine, the washing machine is intelligently controlled, the service life is prolonged, cleaning is performed through attached foams generated at the observation window, and intelligentization of the washing machine is achieved.

The invention relates to an anti-impact stroke switch. The anti-impact stroke switch comprises a bent steel plate, a stroke switch, a buffering spring, a connecting plate, a height adjusting bolt, a steel sleeve and a safety lock; the buffering spring is connected below the stroke switch and the bent steel plate and can realize a buffering effect for impact borne by the stroke switch; and a fixed end of the buffering spring is provided with the height adjusting bolt through which the height of the spring can be adjusted so that the height of the stroke switch can be controlled. According to the anti-impact stroke switch of the invention, the stroke switch is connected through the buffering spring, and the buffering spring will bend with the stroke switch no matter from which direction the stroke switch bears impact; and after being rest, the buffering spring can automatically rebound to an original position, so that normal work of upper limit control can be ensured.

The invention discloses a connectionless power lithium ion battery, belongs to the technical field of lithium batteries, and solves the problem of low practicability of an existing device due to inconvenience in adjustment of the position of a flat plate. The battery is technically characterized by comprising a shell and a base, the base used for supporting the shell is fixedly installed at the bottom of the shell, a plurality of insulating bases are longitudinally arranged in the shell, a bearing assembly is arranged in each insulating base, a position adjusting assembly is arranged on the left side of each bearing assembly, and two adjusting bases are symmetrically arranged in each insulating base; the adjusting base is fixedly connected with the side wall of the insulating base throughbolts, and a plurality of shock pads are evenly distributed at the bottom of the base. According to the embodiment of the invention, the bearing assembly is arranged, the lithium battery is fixed through the arrangement of the bearing assembly, meanwhile, the lithium battery is connected in a connectionless mode, the normal work of the lithium battery is guaranteed, the heat dissipation of the lithium battery is facilitated through the arrangement of the heat dissipation assembly, and the disassembly of the lithium battery is facilitated through the arrangement of the disassembly assembly.

The invention discloses a durable cable with a good use effect. The cable comprises an internal protective jacket layer, and an arc-shaped groove separated by a cross-shaped separation strip is formedin the inner protective sleeve layer; a cable core is arranged in the arc-shaped groove; a flexible filler is filled between the arc-shaped groove and the cable core; an armor layer is arranged on the outer side of the inner protective sleeve layer, elastic protruding blocks are arranged between the inner protective sleeve layer and the armor layer, a polyethylene waterproof layer is arranged onthe outer side of the armor layer, an anti-puncture layer is arranged on the outer side of the polyethylene waterproof layer, and an outer protective sleeve layer is arranged on the outer side of theanti-puncture layer. According to the cable, the cable cores are separated in the arc-shaped grooves in the cable through the cross-shaped separation strips, so that mutual extrusion and abrasion between the cable cores can be avoided, normal work of the cable cores is guaranteed, and the cable is simple in structure, has good compression resistance, water resistance, corrosion resistance and flame retardance and heat insulation performance, can be suitable for being used in various severe environments, and is wide in application range and good in use effect.

The invention discloses an automobile engine hood with a protection function. The automobile engine hood with the protection function comprises a supporting board; the bottom of the supporting board is fixedly provided with a connection board; the top of the supporting board is fixedly provided with a filter; the bottom of the filter communicates with a connection pipe; the bottom of the connection pipe penetrates through the supporting board and extends into the supporting board; a cooling fan is installed inside the supporting board; the input end of the cooling fan communicates with one end, far away from the filter, of the connection pipe; the output end of the cooling fan communicates with an exhaust pipe; and the end, far away from the cooling fan, of the exhaust pipe sequentially penetrates through the supporting board and the connection board and extends into the connection board. The automobile engine hood with the protection function has the beneficial effects that through arrangement of the whole engine hood, in the use process of an engine, vibration of the engine can be reduced effectively, the engine hood has the good cooling and noise reduction functions in the use process, and accordingly the applicability of the whole engine hood is effectively improved.

The invention discloses a charging-free bluetooth headset based on magnetic coupling wireless power transmission technology. The charging-free bluetooth headset comprises a headset body and an electric energy emission circuit, the induction range of which is 0-60 cm. The bluetooth headset body comprises two earphone units and a connecting piece for connecting the two earphone units. Each earphone unit is provided with an ear muff matched with a human ear. Each earphone unit is internally provided with a rechargeable lithium battery, an electric energy receiving circuit and a rectification and voltage regulation system. The electric energy receiving circuit receives electric energy of the electric energy emission circuit, and transmits the electric energy to the rechargeable lithium battery through the rectification and voltage regulation system; and the rechargeable lithium battery provides a working voltage for a bluetooth headphone function circuit. The wireless bluetooth headset can carry out wireless charging on the lithium battery through the magnetic coupling wireless power transmission technology and provide power for inner parts in the wireless bluetooth headset body, so that the defects that a conventional bluetooth headset needs periodic charging, and due to dependence on a charging line, the bluetooth headset is not convenient to use are prevented.