411results about How to "To achieve the purpose of temperature control" patented technology

The invention relates to a refrigerant phase transformation-free refrigerator for recovering liquefied natural gas (LNG) cold energy, which belongs to the technical fields of energy saving and refrigeration. The refrigerant phase transformation-free refrigerator for recovering LNG cold energy comprises an LNG storage tank, an LNG cryopump, an LNG carburetor, an LNG-refrigerant heat exchanger, a refrigerator heat exchanger, a refrigerator fan, a refrigerant low-temperature storage tank, a low-temperature refrigerant pump and various flow valves. R410A is selected as refrigerant to sequentially enter all refrigerators after obtaining refrigeration amount from LNG, the refrigerant releases the refrigeration amount step by step, and the step utilization of the cold energy is realized. The refrigerant is run in a complete liquid state in the whole process and does not generate phase transformation in heat exchangers of all the refrigerators; and the refrigeration amount transformation needed by the refrigerators is realized by adjusting the rotating speed of the fan and the flow of the refrigerant. The invention has the obvious effects of saving the energy and reducing the discharge.

The invention discloses an air supplementing, fermenting and stirring device for biological fertilizer. The device comprises a stirring tank, a stirring rod is arranged in the stirring tank, a seal cover is arranged at the upper end of the seal cover, a first one-way air inlet valve is arranged on the seal cover, a first piston plate is connected to the inner wall of the stirring tank in a threaded mode, a through hole is formed in the upper portion of the stirring cavity, a stirring blade is located in the stirring cavity, the stirring rod is a spline shaft and is of a hollow structure, a spline sleeve is connected to the upper end of the stirring rod, and a stepping motor is fixedly connected to he upper end of the spline sleeve; the non-sleeved portion of the stirring rod is provided with a second one-way air inlet valve, and the portion, in the stirring cavity, of the stirring rod is provided with a one-way air outlet valve; an annular groove is formed in the portion, between the seal cover and the spline sleeve, a lantern ring is in clearance fit with the interior of the annular groove, a connecting rod is connected to the lantern ring, a water bag is attached to the outer wall of the stirring tank, a piston water pumper is connected to the upper end of the water bag and driven by the connecting rod, and a water band is communicated with a water tank. Compared with the prior art, the device has the advantages of being capable of conducting cooling and air supplementing on the biological fertilizer during stirring and lower in production cost.

The invention discloses an integrating method for a high-sensitivity temperature-controlled thick film hybrid integrated circuit. The method comprises the steps of: printing and forming a thick film resistor, a metal conduction band and a metallic bonding area by using a screen printing method; printing and forming a thick film thermistor by using the screen printing method again; forming a thick film insulating medium layer and a thick film metalization layer which is required by sticking of chips on a thermistor thick film by using the same method; and directly installing and sticking a thermosensitive sensing signal treating chip, a temperature control device main chip, other active or passive elements and the like on a thick film base pipe by using a commonly hybrid integrated circuit assembling process, then performing bonding by using bonding wires, and finally sealing a pipe base and a pipe cap under a special atmosphere, so as to obtain a high-sensitivity temperature-controlled thick film hybrid integrated circuit device. According to the method, the thick film thermistor and the temperature control device main chip are in gapless atom contact in the maximum contact area, heat of the main chip can be fast transferred to the thermistor to the maximum degree, so as to realize high-sensitivity temperature-control.

The invention discloses a box-shaped steel girder track deicing vehicle which comprises a vehicle body and an ice and snow removal mechanism for performing ice and snow removal on a box-shaped steel girder track. The ice and snow removal mechanism comprises at least one set of melting ice sensing device, an ice grinding device and an ice and snow sweeping device. The melting ice sensing device comprises a sensing heating host, a sensing transformer, a water tank and a plurality of sets of sensing heating devices. The ice grinding device comprises walking wheels installed on a bogie of the vehicle body. The ice and snow sweeping device comprises two side-by-side vertical rotating ice sweeping brushes and two speed reduction motors. The sensing heating devices, the ice grinding device and the ice and snow removal device are sequentially installed on a chassis of the vehicle body in the advancing direction of the deicing vehicle. The sensing heating devices are used for heating the track face, the contact surfaces of the bottom of an ice layer and the track are heated and molten to form a water film, an ice layer is broken after tire grinding, and finally ice is removed by the vertical sweeping device to complete the deicing operation. The box-shaped steel girder track deicing vehicle has the reliable and efficient deicing function.

The invention provides an intelligent temperature control device for an electric oven. The device has the functions of zero-point detection, automatic correction of various measurement errors, digital filtering, self diagnosis and power-down protection. The device comprises four modules and an electric oven, wherein the four modules are composed of a main control module, a temperature detection module, a temperature control module and a man-machine interface module. Firstly, the temperature of the electric oven is detected by a temperature sensor and then converted into a millivolt voltage signal. After that, the voltage signal is amplified by an amplifier circuit inside the temperature detection module and then sent to an A / D module. After being subjected to the analog / digital conversion process by the A / D module, the signal is fed to a single-chip microcomputer of the main control module and then subjected to the data processing process by the single-chip microcomputer. After that, the temperature is displayed by a digital tube display module arranged inside the man-machine interface module, and whether to alarm or not is judged at the same time. Meanwhile, the temperature is compared with a preset temperature, and a control variable is figured out according to a preset control algorithm. In this way, the on-off ratio of a solid state relay can be controlled according to the control variable.

The invention discloses a temperature control valve element. The temperature control valve element comprises a shell with containing space, a base, a movable ceramic piece, a fixed ceramic piece, a first rotary adjusting assembly and a second rotary adjusting assembly; the bottom end of the shell is sleeved with the base in a connected manner, and a hot water inlet, a cold water inlet and a mixed water outlet are formed in the base; the movable ceramic piece and the fixed ceramic piece are both sleeved with the containing space of the shell in a connected manner, the movable ceramic piece is in butt joint with the base, and the movable ceramic piece and the fixed ceramic piece are in tight fit; the movable ceramic piece and the fixed ceramic piece are each provided with a hot water inlet through hole, a cold water inlet through hole and a mixed water outlet through hole; the first rotary adjusting assembly is sleeved with the containing space in the top of the shell in a connected manner in the manner of being capable of rotating in the axial direction, and the bottom of the first rotary adjusting assembly is connected with the movable ceramic piece in a clamped manner; and the second rotary adjusting assembly comprises a pushing component, a valve rod and an elastic recovery element. Temperature adjustment, flow adjustment and switch control can be achieved, an extra switching valve element is omitted, the problem that an internal structure of a constant-temperature faucet is too complex and too large in size is solved, and the production cost is reduced.

The invention provides an automatic hot water heating control device used in a greenhouse, and relates to the automatic hot water heating control device suitable for greenhouse heating. A single-chip microprocessor of a control system controller is electrically connected with a computer, an electric actuator which is connected with a regulating valve and a temperature sensor respectively by data lines, and the controller is internally provided with the single-chip microprocessor, an input keyboard and a display nixie tube. The temperature sensor measures the actual temperature in the greenhouse, the single-chip microcomputer periodically performs data acquisition, program storage, data processing and storage, setting information is input through the keyboard, the data are transmitted and stored in a host computer, a dedicated nixie tube display element displays the preset temperature and the measured temperature, finally, the single-chip microprocessor compares parameters, thus determining actuation direction and actuation time of the electric actuator, regulating the flow of the hot water in the a radiating tube, and automatically regulating the temperature in the greenhouse.

The invention discloses a high-temperature-resistant immersion probe for a laser-induced breakdown spectroscopy system. The high-temperature-resistant immersion probe comprises a high-temperature-resistant pipe (6), a high-temperature-resistant pipe sleeve (7), a high-temperature-resistant pipe heat insulation pad (8), an external heat insulation layer (9), a middle protection pipe (11), a sealing sheet, a lens barrel, a rear end box body (20), a temperature sensor (14), an air pressure sensor (16), an air inlet (23), an air outlet (12) and a lead screw drive system (21). The high-temperature-resistant immersion probe has a function of automatically and precisely controlling the temperature of a multilayer temperature control cavity in a high temperature environment and can guarantee stable parameters of an optical element in the probe. By the adoption of a coarse-fine combination two-stage servo control system consisting of a laser distance measurer, a laser-induced breakdown spectroscopy signal and a precision lead screw, quick and accurate positioning required by measurement is realized, the working time of the laser-induced breakdown spectroscopy system is shortened, and burdens on a laser device and a signal processing unit are relieved.

The invention provides a PWM heating control system and method. According to the system, data information is collected through a temperature sensor, the result is sent to a master controller controlled by a single-chip microcomputer, the master controller generates PWM waves with a corresponding duty ratio by means of processing of the PID algorithm of the single-chip microcomputer, and data is displayed through a display circuit. The state of an NMSO is controlled, then an SX1308 boost control chip is controlled, the aim of controlling heating is achieved, and the temperature is stabilized atthe set temperature.

The invention discloses a microwave plasma reactor used for manufacturing a monocrystal diamond and a diffusion device thereof. The diffusion device comprises a diffusion base, a gas inlet pipe groupand medium glass, wherein the diffusion base is provided with a conical wall body; the upper edge of the wall body is provided with a first round flange; the lower edge of the wall body is provided with a second round flange which is parallel to the first round flange; the enclosure of the wall body defines a diffusion opening therein; the area of the cross section of the diffusion opening is gradually increased in a direction from the first round flange to the second round flange; the gas inlet pipe group comprises at least two gas inlet pipes which are circumferentially and uniformly distributed around the axis of the diffusion base; the medium glass is clamped in the first round flange and seals the upper part of the diffusion opening; a plurality of gas holes are also circumferentiallyand uniformly arranged in the wall body along an axis; and gas brought in by the gas inlet pipes is introduced into the diffusion opening through the gas holes. According to the invention, through arrangement of the conical diffusion base, microwave is guided to be distributed around a seed crystal in a uniform and stable ellipsoid equipotential surface manner, so a good environment is provided for growth of the seed crystal, and the growth quality of the seed crystal is improved.

The invention relates to a methanol-to-gasoline combined production technology, and belongs to an important link of a coal-preparing high-clean energy technology. The technology includes the steps: methanol is heated, then a great part of the methanol enters a dimethyl ether reactor, is subjected to crude dehydration, then enters a gasoline transformation reactor and is further dehydrated, and the product passes through a heat exchanger and then is subjected to oil-water separation; crude gasoline is separated to obtain dry gas through a deethanizer; a part of the dry gas is subjected to heat exchange through the heat exchanger, then enters a circulation compressor and together with a dimethyl ether reactor outlet product enters a conversion reactor, so as to achieve the temperature dropping and control purposes; the gasoline having the dry gas removed enters a debutanizer, and removed liquefied gas and the other part of methanol steam undergo a superimposed etherification reaction; crude gasoline coming out of the debutanizer is separated to obtain the product gasoline and heavy oil by a gasoline separation tower; the heavy oil and the other part of the dry gas coming out of the deethanizer are together modified by a transalkylation catalyst to obtain a gasoline component, dry gas and liquefied gas.

The invention relates to the field of cups, in particular to an intelligent temperature control cup. The intelligent temperature control cup comprises a cup body, a base, an automatic temperature control mechanism, a manual temperature control mechanism and a temperature control phase change liquid. The cup body structure and the temperature control mechanism are designed specially, can be used flexibly, has fast temperature adjusting and heat preserving functions, meets the personalized requirements of different people groups in difference seasons and has potential market value.

The invention provides an axial-movement temperature-controlled glass heat tube which comprises a glass tube and an inner tube. The lower end of the inner tube is a heat collection end, and the upper end of the inner tube is a condensation end; a temperature-controlled telescopic sealing element is arranged in the condensation end of the inner tube and comprises a support fixed in the inner tube, the lower portion of the support is connected with a heat deformation piece which can move in a telescopic mode in the axial direction of the inner tube, and the lower end of the heat deformation piece is further connected with a sealing element; the inner wall of the condensation end of the inner tube is further provided with an annular sealing step of a necking shape, and a gap is kept between the sealing element of the heat deformation piece and the upper side of the sealing step. By arranging the sealing step and the temperature-controlled telescopic sealing element in the inner tube of the glass heat tube, intercepting and releasing working media can be automatically achieved at set temperature, and then the purpose that the temperature of the glass heat tube can be controlled is achieved.

The invention provides a composite functional material, a pressure sensing device and an intelligent temperature control system. The composite functional material has a piezocaloric effect, has the characteristic that the heat-conducting property is controlled by pressure, and has good applications in the fields of sensing, temperature control and the like; the pressure sensing device implementedbased on the composite functional material has the characteristics of simple structure and conveniently-adjustable sensing characteristics, can select different functional materials according to different target requirements, and has a wide application range; and the intelligent temperature control system implemented based on the composite functional material can make full use of environmental conditions to achieve the purpose of temperature control, greatly reduces the consumption of other temperature control resources, and achieves the goal of energy conservation and emission reduction.

Disclosed is a notebook computer cooling base including the base, a fan for dissipating heat is mounted inside the base, A lead is connected to that base, the other end of the wire is provided with aUSB interface, the invention adds a computer clamping device on the basis of the traditional notebook radiator, you can attach the notebook to the radiator, and the computer clamping device can adjustthe width of the length, suitable for different laptops, At the same time, the inclination angle of the radiator can be adjusted conveniently, which is convenient for users to choose the angle of inclination suitable for them, this design also has the intelligent temperature control function, The temperature information is collected by multiple temperature sensors at different positions, and thepurpose of temperature control is achieved by using the working function of the controller and the fan. Since multiple temperature sensors are arranged at different positions, the problem that a single temperature sensor can not detect the temperature rise in a local area can be effectively solved.

The invention discloses a heat conduction oil heat-exchange system. The heat conduction oil heat-exchange system comprises a heating module and a cooling module, wherein the heating module comprises aheating assembly, and a liquid outlet of the heating assembly is in communication with a heated part through a pipeline; the heated part is connected with a first circulating pump which is in communication with a return port of the heating assembly, and the liquid outlet of the heating assembly is in communication with an inlet pipeline of the cooling module; the cooling module is sequentially and serially connected with a second circulating pump and a cooler, the cooler is connected with a cooled part, and the cooled part is in communication with the outlet pipeline of the cooling module; and the outlet pipeline of the cooling module is connected with the return port of the heating assembly, and the heating module and the cooling module are arranged in parallel. The heat conduction oil heat-exchange system makes the heat-exchange system energy saving, high heat efficiency, uniform heat transfer and accurate temperature control.

The invention relates to a novel refrigerating anaerobic culture box. The refrigerating anaerobic culture box comprises an operating chamber, a culture chamber, a sampling chamber, operating gloves, arefrigeration system and a gas path system, wherein a compressor, a condenser, a throttling device and an evaporator which are sequentially connected through a pipeline and form a closed loop are arranged on the refrigeration system; the refrigeration system is arranged and can decrease the temperature in the culture box to the environment temperature or below, and the condition that existing culture boxes can only perform culture at the temperature higher than the environment temperature is changed; the refrigeration process is a dehumidification process, water vapor in the box can be condensed on the evaporator of the refrigeration system, when the water vapor is condensed into water drops, the water drops can be collected in a water pan, the dosage of a desiccant can be reduced, and the use time of the desiccant can be prolonged; a fan is arranged, the temperature is controlled by a microcomputer intelligent temperature controller, and the temperature control accuracy is improved;the culture box adopts liquid crystal display and slight touch operation and is convenient to observe and use.

A translatable ventilation window, comprising a left side wall, a right side wall, a bottom wall, a movable window, a left / right fixed window and a controller, a movable window is arranged between the left / right fixed windows, and the bottom of the movable window passes through The fixed shaft is connected with the motor, and the motor is connected with the power supply circuit through the controller. The controller includes a metal shell, an input power line, an output power line, a fixed beam, a rotating beam, a movable conductive column, a fixed conductive groove, and a wax block. The design not only can automatically ventilate and cool down in case of fire, is convenient for reducing fire loss, has a simple structure, but also has strong practicability, low cost and high sensitivity.

The invention relates to an integration method of a high-sensitive temperature-controlled thin film hybrid integrated circuit; the integration method comprises the following steps of: firstly growing a thin film resistor, a thin film conduction band and a bonding region on the surface of an aluminium nitride (Al3N4) ceramic substrate in a thin film sputtering manner or an evaporation manner; then forming a thermistor thin film in the same manner and forming an insulating medium layer and a metallization layer required for pasting a chip on the thermistor thin film in the same manner; mounting a thermo-sensitive sensing signal processing chip, a temperature controller main chip and other active or inactive components on the substrate; and finally, bonding by adopting a bonding wire, and sealing a tube base and a tube cap in a specific atmosphere to obtain the high sensitive temperature-controlled thin film hybrid integrated circuit. The integration method can be used for realizing the gapless contact, which belongs to interatomic contact, of a thin film thermistor and the temperature controller main chip on the maximum contact surface, so that the heat of the main chip can be rapidly conducted to the thermistor to the maximum extent, and thus high-sensitive temperature control can be realized.

The invention discloses a temperature adjustable box comprising a box body, wherein the box body is internally provided with an insulation cavity with a forward opening, the opening end of the insulation cavity can be completely closed manually, a selection cavity located at the lower end of the insulation cavity and having a forward opening is disposed in the box body, and the inner wall of the selection cavity is provided with six groups of heating devices with central symmetry. The temperature adjustable box provided by the invention achieves the purpose of selecting temperature control bycontrolling the number of heating structures in the storage space, and is convenient to operate since the equipment is started up by the placed weight.

The invention relates to the technical field of hydrogen fuel cells, and discloses a hydrogen fuel cell assembly system. The system comprises the following devices: a fuel cell module, a hydrogen supply module, an oxygen supply module and a cooling module, the fuel cell module is a fuel cell system host, a KW fuel cell module is arranged in the fuel cell system host, the hydrogen supply module comprises a nozzle valve, an injection pump, a condenser, an electric pile nitrogen discharging valve and a water discharging valve, the nozzle valve is connected with the injection pump, the injection pump is connected with the condenser, the condenser is respectively connected with the electric pile nitrogen discharging valve and the water discharging valve, and the oxygen supply module comprises amixed discharging device, a throttle valve, a humidifier, an intercooler, an air compressor, an air flow meter and a filter. The hydrogen fuel cell assembly system has the advantages of being good incooling effect and the like, and solves the problems that: the efficiency of the hydrogen fuel cell becomes high, more heat is generated during work of the hydrogen fuel cell, and common cooling is difficult to meet.

The invention discloses an unmanned aerial vehicle infrared temperature measurement-based refrigerated warehouse temperature control system. The unmanned aerial vehicle infrared temperature measurement-based refrigerated warehouse temperature control system includes a first unmanned aerial vehicle, a second unmanned aerial vehicle, an N-th unmanned aerial vehicle, an upper computer, an upper computer power source, an alarm device, a first refrigerator, a second refrigerator, an N-th refrigerator and an external power source; the upper computer is wirelessly connected with the first unmanned aerial vehicle, the second unmanned aerial vehicle and the N-th unmanned aerial vehicle; the upper computer is electrically connected with the upper computer power source, the alarm device, the first refrigerator, the second refrigerator and the N-th refrigerator; the first refrigerator, the second refrigerator and the N-th refrigerator are electrically connected with the external power source; and the first unmanned aerial vehicle, the second unmanned aerial vehicle, the N-th unmanned aerial vehicle respectively include an ultrasonic ranging module, an infrared temperature measurement module, a GPS module, a microprocessor, an unmanned aerial vehicle battery module, a ZigBee module and a spiral wing motor group. With the unmanned aerial vehicle infrared temperature measurement-based refrigerated warehouse temperature control system of the invention adopted, temperature detection can be realized, and corresponding control can be performed according to measured temperature, and alarms can be emitted according to the measured temperature.

A cooling system for tractors, comprising a water tank, an oil radiator, an air radiator, a cooling fan, a controller and a power supply, the water inlet and outlet of the water tank communicate with the water channel in the engine, the inlet of the oil radiator The oil port and the oil outlet communicate with the oil passage in the gearbox, the front of the water tank is connected with the back of the air radiator, the back of the water tank is connected with the front of the oil radiator, and the back of the oil radiator is in front of the cooling fan. For setting, the cooling fan is connected to the power circuit through the controller, the controller is set near the junction of the water tank and the oil radiator, and the power supply is set under the cooling fan; the controller includes a metal shell, an input power cord , Output power cord and wax block. This design not only has high heat dissipation efficiency, but also has strong controllability.

The invention provides an automobile engine hood with a heat dissipation fan. The automobile engine hood comprises an arc-shaped top edge, an arc-shaped bottom edge, a left arc-shaped edge, a right arc-shaped edge, a heat dissipation fan, a controller and a power source. The left arc-shaped edge and the right arc-shaped edge are sandwiched between the arc-shaped top edge and the arc-shaped bottom edge; the arc-shaped top edge, the arc-shaped bottom edge, the left arc-shaped edge and the right arc-shaped edge define the same cover plate together; the cover plate is provide with a heat dissipation hole; the heat dissipation fan is arranged in the heat dissipation hole and is in circuit connection with the power source after passing the controller; the controller is arranged at the portion, close to the arc-shaped top edge, of the cover plate, and the power source is arranged at the portion, close to the arc-shaped bottom edge, of the cover plate; the controller comprises a metal shell, an input power source wire, an output power source wire, an insulation plate and a transverse wax strip. The automobile engine hood is high in heat dissipation efficiency and great in controllability.

A computer case, comprising a case body, a motherboard, an optical drive, a power supply, a cooling fan and a controller, the case body comprising a front panel, a rear panel, a top panel, a bottom panel, a front panel and a back panel, the front panel An optical drive is installed, a main board is installed on the back panel, a power supply is installed at the intersection of the rear panel and the bottom panel, a drive fan is installed on the bottom panel, and a cooling fan is installed on the rear panel near the top panel, and the cooling fan is installed by the controller. Afterwards, it is connected with the power circuit; the controller includes an insulating shell, an input power line, an output power line, and a temperature-sensitive metal sheet. This design not only has high heat dissipation efficiency, but also has strong controllability.

The invention discloses a biochemical incubator with a temperature control function. The incubator comprises a rectangular box body. A plurality of strip-type slots are formed in the opposite side surfaces of the rectangular box body; a plural of culture trays are arranged in the rectangular box body; each of the culture trays can be correspondingly inserted into a corresponding stripe-type slot;a temperature sensor and a humidity sensor are arranged at the center of each culture tray; each culture tray comprises a double layer tray, a test tube tray and a netty tray; a humidifying tank is processed in the lower surface in the rectangular box body; a water inlet is processed in the side surface of the rectangular box body; a first electromagnetic valve is embedded into the water inlet; awater outlet is formed in the lower surface of the rectangular box body; a second electromagnetic valve is embedded into the water outlet; a plurality of lamp slots are processed in the back surface of the rectangular box; an LED lamp is mounted in each lamp slot; and evaporators are arranged at two ends of each of the lamp slots on the back surface of the rectangular box body. The biochemical incubator disclosed by the invention has the beneficial effects of being simple in structure and high in practicality.

The invention provides a continuous drying system for production of vanadium-free rare earth-based titanium tungsten powder. The system comprises a plurality of groups of drying furnaces, chain type conveying machines, roller type conveying machines, an automatic loading machine and an automatic unloading machine, wherein the plurality of groups of drying furnaces are arranged side by side; each drying furnace comprises a plurality of sections of temperature control boxes in a connection manner to form a calcination channel; every two temperature control boxes are in one group and all the temperature control boxes are divided into eight sections; the temperature sub-gradients of eight temperature control sections are reduced in sequence from the front to back; a negative-pressure exhaust fan is arranged at the tops of the temperature control boxes in the eighth temperature section; the roller type conveying machines are positioned at the inlet ends and the outlet ends of the drying furnaces and are arranged in a crossed manner with the chain type conveying machines at the outer ends of the roller type conveying machines; sensors are arranged on the connection parts of the roller type conveying machines and the chain type conveying machines; the automatic loading machine and the automatic unloading machine are arranged at the appropriate positions on the chain type conveying machines. The continuous drying system can be used for simulating the environment in an electric heating furnace by taking measures of setting the temperature in a subsection manner, adjusting the running speed and the like, so that the aim of temperature control is realized.

A window for temperature control, comprising a window, a motor and a controller, a thick glass arranged in the middle of the window is provided with a movable opening in the middle, a rotating shaft and a fan blade connected thereon are arranged in the movable opening, and one end of the rotating shaft is connected to the The driving ends of the motors are connected; the controller includes a metal casing, an input power line, an output power line, a fixed beam, a rotating beam, a movable conductive column, a fixed conductive groove, and a wax block. The design can not only automatically ventilate and cool down during a fire, which is convenient for reducing fire losses, but also has a simple structure, strong practicability and low cost.

The invention relates to a vehicle engine housing with a heat dissipation port at a top end thereof, the bottom of the arc top cover is connected with the upper edge of the arc front cover, the loweredge of the arc front cover is connected with the top of the arc bottom cover, the left and right ends of the arc front cover are respectively provided with a headlamp, the arc top cover is provided with a heat dissipation hole, the heat dissipation hole is provided with a heat dissipation fan, the heat dissipation fan is connected with a power supply circuit via the controller, the controller isarranged near the junction of the arc top cover and the arc front cover, and the power supply is arranged near the headlamp; The controller comprises a metal casing, a left power supply wire, a rightpower supply wire, a left conductive sheet, a right conductive sheet, a left conductive fold, a right conductive fold, a left wax strip, a right wax strip and a middle conductive part. This design notonly has high heat dissipation efficiency, but also has strong controllability.