1142 results about "Hot plate" patented technology

The invention relates to the technical field of distributed control, in particular to an automatic control system and process for a corrugated carton production process, and the system comprises a body paper state online monitoring module which is used for collecting body paper humidity, preheating temperature and paperboard tension values in real time at a preheater node, combining the values into a multi-dimensional input data stream, establishing an initial working condition state vector, and outputting the initial working condition state vector; and calculating a deviation value between each parameter in the initial working condition state vector and a standard set value, and generating an upstream disturbance feature set. According to the method, the predicted value is compared with the control threshold value, the adjustment amount of the steam pressure or the production line speed of a plurality of downstream hot plate areas can be calculated, a distributed and feed-forward compensation instruction is generated, and the closed loop from source disturbance monitoring to future state multi-dimensional prediction to downstream multi-point cooperative compensation is more accurate. The suppression of production disturbance is realized, the control precision and response speed of quality fluctuation are improved, and the rejection rate caused by quality problems is reduced.

According to the multi-path cooling control method for the non-adjustable flow of the cooling spray box after hot plate rolling, the mode that an annular rail is combined with a trolley is adopted, the trolley bears a sample through a sample bearing table to do annular motion, the annular rail is an oval rail comprising two parallel linear segments and two semicircular segments, and at least one cooling spray box is arranged along the linear segment rail; the cooling area can be infinitely lengthened at any workpiece speed; according to the cooling starting temperature, the water cooling speed, the cooling stopping temperature, the cooling stopping time between the cooling areas and the production line cooling spray box layout of the N cooling areas determined by the experiment, the experiment device is configured according to different spray box opening modes, the cooling experiment is carried out, and spray box opening mode parameters corresponding to the optimal cooling speed of the N cooling areas are obtained; carrying out cooling control after rolling on corresponding sample production; besides, the method is implemented under the condition basically consistent with the actual working condition of the production line, so that the product design output and the production line process control are more accurate and efficient, the product research and development speed can be effectively increased, the process control precision is improved, and the production line trial-manufacturing cost is reduced.

The utility model discloses preserved meat packaging and film covering equipment which comprises a box body, a plurality of carrying frames are transversely connected in the box body in a sliding mode, the two sides of each carrying frame are connected with driving mechanisms arranged in the side walls of the box body, a plurality of clamping columns are longitudinally connected between frame plates on the two sides of each carrying frame in a sliding mode, and electric heating plates are arranged on the opposite faces between the clamping columns. The outer end face of the clamping column on the outermost side is longitudinally connected with the output end of a pushing air cylinder on the carrying frame, an evacuating cover matched with the opening of the box body is arranged above the opening of the box body, and a plurality of sealing mechanisms are longitudinally arranged in the evacuating cover and located between every two adjacent carrying frames; according to the equipment, a folded thermal shrinkage film can be clamped through cooperation of the clamping columns, the thermal shrinkage film is subjected to thermal sealing to form mutually independent small bags, then the distance between the carrying frames is shrunk through the driving mechanism, the small bags are extruded open for bacon bagging, finally, the small bags are vacuumized and sealed through the closed vacuumizing cover, the labor cost in the bacon packaging process is reduced, and the production efficiency is improved.

The utility model discloses a false scalding prevention device for cigarette cartons, and relates to the technical field of cigarette carton production. According to the technical key points, the device comprises a bottom plate, an air groove is formed in the bottom plate, a heating mechanism is arranged at the bottom of the bottom plate, an ironing plate mechanism is arranged at the bottom of the heating mechanism, the heating mechanism comprises a connecting screw rod, the lower end of the connecting screw rod is in threaded connection with a heat conduction plate, and a heating plate is fixedly installed in the center of an inner cavity of the heat conduction plate; according to the technical scheme, the temperature sensors are used for monitoring the temperature of different positions of the heat conduction plate, data are fed back to a control system, the real-time vehicle speed and the preset temperature value are combined, and the temperature of the heat conduction plate is controlled to be constant. It is ensured that the flexible ironing plate is kept in the optimal working temperature interval, the accuracy and stability of temperature control are improved, and the false ironing problem caused by inaccurate temperature control and uneven heating time of a traditional beautifying device is solved.

The invention provides a method for optimizing a NiCr alloy resistance temperature coefficient, which comprises the following steps of: producing by adopting a thin film process, selecting an insulating substrate with a certain thickness, firstly entering a metallization process, preparing a series of NiCr alloy thin film samples by adding a certain amount of doping gas and changing the content of argon in the NiCr metallization process, and then carrying out photoetching on the NiCr alloy thin film samples in a photoetching process to obtain the NiCr alloy resistance temperature coefficient. The method comprises the following steps: photoetching an electrode pattern by using a photoetching plate, carrying out secondary photoetching after an etching process to obtain a resistor pattern, carrying out thermal annealing on an insulating substrate engraved with the pattern under a vacuum condition at a certain temperature for a period of time, and after thermal annealing treatment, placing a test article in a hot plate to carry out resistance test at different temperatures. And finally, the metal film resistors prepared under different argon contents are used at different temperatures, TCR is calculated and compared to obtain the optimized NiCr alloy film resistor, the NiCr film is deposited on the insulating substrate by adjusting the argon content, and the resistance temperature coefficient of the NiCr film can be further optimized on the existing performance.

An electric hot plate lifting type iron ore sintering zero-carbon ignition heat preservation device comprises a sintering trolley and an ignition device located above the sintering trolley on the upstream of a sintering machine. The ignition device comprises an ignition heat preservation furnace and a lifting type electric heating plate device arranged on the ignition heat preservation furnace. And the ignition holding furnace is arranged above the sintering pallet. The lifting type electric hot plate device comprises a lifter, a power transmission bearing rod, a resistance hot plate and a lifting motor. The lifter is installed on the upper portion of the furnace top of the ignition holding furnace. And the power transmission bearing rod is arranged on the lifter and penetrates through the lifter and the furnace top of the ignition holding furnace. And the resistance hot plate is arranged above the sintering pallet and is connected with the lower end of the power transmission bearing rod. The lifting motor is connected with the lifter and drives the electricity transmission force bearing rod through the lifter to drive the resistance hot plate to move up and down. According to the utility model, electric heating ignition is adopted, clean and green zero-carbon ignition is realized, the carbon emission is obviously reduced compared with the prior art, the ignition is uniform, and the service life of the furnace lining of the ignition furnace is effectively prolonged.

The utility model discloses a multi-injection-hole upper hot plate with high precision and high temperature control stability, which is of a multi-layer structure and sequentially comprises an upper heat insulation plate, an upper plate warm oil layer, a nozzle warm oil layer, a lower plate warm oil layer, a lower heat insulation plate, a hot plate and a back plate from top to bottom. The upper plate warm oil layer, the nozzle warm oil layer and the lower plate warm oil layer are respectively connected with a set of cooling oil circulating system; a plurality of injection nozzles are arranged on the back plate, the upper ends of the injection nozzles are connected with the upper heat insulation plate, rubber enters cavities of the injection nozzles through injection runners, and the cavities of the injection nozzles are directly connected with the upper plate warm oil layer, the nozzle warm oil layer and the lower plate warm oil layer; and gaps exist between the lower half part of the injection nozzle and the lower heat insulation plate and the hot plate.

The invention discloses an injection machine with intelligent temperature control and precise positioning functions. The injection machine comprises a plasticizing injection system, a mold locking system, a driving system and a heating and cooling system, the plasticizing injection system comprises a plasticizing device and an injection device; the plasticizing device comprises a plasticizing charging barrel and a sleeved variable-pitch plasticizing screw rod mounted in the plasticizing charging barrel; the injection device comprises a syringe, a multi-injection-hole upper hot plate and a multi-injection-hole lower hot plate; the mold locking system comprises an electric control sliding positioning device and a belt positioning moving plate; the driving system comprises a hydraulic device driven by hydraulic oil in an oil path pipeline; and the heating and cooling system comprises a cooling system, a cooling pipeline and an electric control screw rod temperature control device. The invention also provides an injection method. The method has a wide application prospect.

A tamper for making paraffin blocks for histology may include a pliable tamper head and a handle. The handle may be permanently or removably attached to the tamper by using screws, magnets, or the like. The tamper may be made from a pliable material, such as a silicone rubber, with improved thermal transfer and high latent heat. In use, the tamper may be warmed in advance to a working temperature by placing the tamper on a hot plate of the embedding station or on a dedicated smaller hot plate. Alternatively, the tamper may be heated with an electric resistive element, a thermoelectric device, or an electric induction coil.

The invention relates to a flash evaporation material with high transparent strength and a preparation method thereof, the flash evaporation material comprises the following raw materials: polyethylene with high transparent strength of 0.2-3 kN / m; the high-permeability strength is equal to the moisture permeability index * the longitudinal tensile strength; the test standard of the tensile strength is a constant-speed tensile method for testing the tensile strength of paper and paperboards according to GBT 12914-2018; the test standard of the moisture permeability index is GB / T 11048-2018 determination of thermal resistance and moisture resistance (evaporation hot plate method) under the physiological comfort steady state condition of the textile. The flash evaporation material disclosed by the invention has relatively good high-transmittance strength.

The invention discloses a method for carrying out layered color mixing printing on plane color content by using an FDM printer based on a multilayer color reverse solution algorithm, and belongs to the technical field of 3D printing, and the method comprises the following steps: step 1, carrying out vectorization conversion on color information of an input image to obtain a preprocessed image with a clear contour and pure color; and 2, building a multilayer color reverse solving system based on an improved Kubelka-Munk model, reversely and accurately calculating color values of all layers, and ensuring that the color of each layer strictly conforms to the actual color generation capability range of the consumable. And step 3, carrying out layer-by-layer printing on the layering result according to a specific thickness and sequence, and finally presenting the original picture color on the contact surface of the printed piece and the hot plate. The method has the advantages that patterns with richer colors can be presented on the surface layer of a printed piece, and the limitation that the color of a printing material is limited in presentation in FDM multi-color printing is improved; meanwhile, under the condition that the printing process and hardware iteration cost are not increased, richer color selection is achieved.

The invention provides a wind power blade deicing and snow protection device, and relates to the technical field of wind power generation equipment, the wind power blade deicing and snow protection device comprises a wind power generator body, one end of the wind power generator body is rotatably connected with a plurality of blade bodies, and the exteriors of the blade bodies are slidably connected with deicing mechanisms; and the deicing mechanism is used for deicing the blade main body. By means of the non-contact heating mode of the electric heating plate, physical damage of mechanical parts to the blades is thoroughly avoided, meanwhile, the sliding type structure does not need to occupy the internal space of the blades, and the compactness and operation convenience of the device are remarkably improved.

A high-power electric heating disc, an electric heating assembly and a cooking device comprise an electric heating container, the electric heating container is connected with the electric heating assembly, the electric heating disc comprises a first mica fixing piece and a second mica fixing piece, and the two faces of the first mica fixing piece and the two faces of the second mica fixing piece are each provided with a clamping groove used for winding a heating wire. A first heating wire and a second heating wire are arranged, the first heating wire and the second heating wire are wound to the clamping groove of the second mica fixing piece through the clamping groove of the first mica fixing piece, and the first heating wire and the second heating wire are wound in the clamping grooves of the first mica fixing piece and the second mica fixing piece in a staggered mode. The two heating wires are used for winding, the electric heating disc with higher power is realized in a combined mode, the specifications of the heating wires can be reduced, the winding difficulty is reduced, the control precision is improved, the heating wires are wound in a staggered mode, good uniformity can be guaranteed, and the temperature unit area is not greatly changed.

The utility model discloses a table type glass bioreactor and relates to the technical field of bioreactors. The bioreactor comprises a bioreactor body, wherein a sealing cover is arranged at the top of the bioreactor body. The moving mechanism can drive the stirring mechanism to rotate while moving up and down, so that the stirring mechanism is in a working state of rotating while moving up and down in the bioreactor body, and high-temperature liquid positioned below the bioreactor body can flow to an upper area; meanwhile, the liquid with lower temperature above the bioreactor body flows to the area with higher temperature below the bioreactor body, so that the temperature gradient of different height positions in the bioreactor body is broken, even in the area far away from the heating plate, the uniform distribution of the temperature can be realized, and the consistency of the temperature in the bioreactor is improved; and biological processes such as cell culture and fermentation are facilitated.

The invention relates to the technical field of textile fabric drying, and discloses a textile fabric drying device which comprises a drying box and a hot air drying bottom shell, the hot air drying bottom shell is arranged at the bottom of the drying box, and a plurality of electric heating guide rollers are arranged between the inner walls of the two sides of the drying box. An electric heating guide roller is arranged on the back side of the drying box, tension adjusting rollers are further arranged in the middles of the inner walls of the two sides of the drying box, the electric heating guide roller and the tension adjusting rollers can enable cloth to be conveyed in an M shape in the drying box, and an adjusting frame is arranged on the inner wall of one end of the drying box. One side of the cloth is heated and dried through heat radiation through the electric heating plate, the position of the electric heating plate away from the cloth is adjustable, meanwhile, heating and drying of the electric heating guide roller are matched with vibration generated by the vibration rod, the cloth is vibrated, moisture in the cloth is vibrated out, and therefore evaporation of the moisture in the cloth is accelerated; and the drying effect and the drying efficiency of the cloth are improved.

The invention discloses a graphene microcrystalline far-infrared electric heating plate and a preparation method thereof. The graphene microcrystalline far-infrared electric heating plate comprises a base layer, a functional layer arranged on the base layer and a microcrystalline glass layer covering the functional layer, the base layer is formed by compounding silicon nitride ceramic and boron carbide short fibers, the volume fraction of the boron carbide short fibers is 15%-20%, the bending strength is larger than or equal to 800 MPa, and the heat conductivity coefficient is 80-100 W / (m.K); and the functional layer comprises an electric conduction and heat conduction layer and a far infrared radiation layer. The graphene microcrystal far infrared electric heating plate adopts a multi-layer composite structure, a functional main body is formed by compounding a graphene nanosheet and a hexagonal boron nitride nanotube, the square resistance is less than or equal to 100 omega / square, the heat conductivity coefficient reaches 500-800 W / (m.K), 30-second rapid thermal response is realized, and the heating response speed is increased by more than 90% compared with that of a traditional resistance wire; the far infrared radiation layer is compounded with nano titanium dioxide through tourmaline, and can stably emit far infrared rays of 8-14 microns, the emissivity is greater than or equal to 88% and is far higher than that of a common material and is less than 70%, and the blood circulation and metabolism of a human body are effectively promoted.

The utility model discloses a material screening machine of a glass crusher, and relates to the technical field of glass recovery. Comprising an equipment shell, a feeding hopper is fixedly installed at the upper end of the equipment shell, a discharging opening is formed in one side of the equipment shell, a discharging sliding groove is formed in the discharging opening, supporting legs are fixedly installed at the bottom of the equipment shell, a heating mechanism is arranged in the equipment shell, and the heating mechanism comprises a heating round barrel fixed in the equipment shell; a feeding opening is formed in the upper end of the heating barrel, an electric heating plate is fixedly installed at the bottom of the heating barrel, a spiral material pushing plate is arranged in the heating barrel, and one end of the heating barrel is connected with a screening mechanism. According to the material screening machine of the glass crusher, glass fragments can be heated by the heating machine, so that glass cement on the glass fragments is melted, and the melted glass cement on the glass fragments can be quickly screened out by the screening mechanism, so that the glass cement is separated from the glass fragments.

The invention relates to the technical field of 3D printers, in particular to a 3D printer precision guide rail platform leveling device which comprises a moving plate and a printing plate and further comprises a hot plate, an adjusting assembly and a detection assembly, the hot plate is connected to the upper portion of the moving plate, the adjusting assembly is connected to the lower portion of the moving plate, and the top of the adjusting assembly is connected with the hot plate. Through the arrangement of the detection assembly, when the printing plate is not level, the distance for pushing the moving column to move upwards can be changed at the corner of the printing plate, so that the moving column deviates from the specified height, the horizontal state of rotation is further broken, whether the rotating rod returns to the horizontal state or not is observed during leveling, and therefore the leveling degree is visualized; and when the pressing plate downwards presses the printing plate, the protruding edge is attached to the edge of the printing plate, so that the pressing plate is clamped with the corner of the printing plate, and it is avoided that the printing plate deviates in the printing process, and the printing quality is affected.

The present invention discloses a glass fiber reinforced polypropylene material, a preparation method thereof, and an application thereof. The glass fiber reinforced polypropylene material of the present invention comprises the following components, by weight: 60 to 80 parts of polypropylene resin, 20 to 40 parts of glass fiber, 0.3 to 3 parts of copolymer, and 0.2 to 2 parts of stearate lubricant; the copolymer is one or more of ethylene-acrylic acid copolymer, ethylene-methacrylic acid copolymer, and ethylene-methacrylic acid-acrylic acid copolymer. The glass fiber reinforced polypropylene material of the present invention utilizes the separation effect of glass fiber and resin at the melt flow front of the composite material to improve welding performance. By using a special copolymer as a compatibilizer to regulate the degree of separation of glass fiber and resin at the melt flow front, and using a special lubricant to promote the bonding of the melt during the welding process, the good mechanical properties of the glass fiber reinforced polypropylene material are maintained while significantly improving its hot plate welding performance.

The utility model provides laminating equipment which comprises a base, a bracket used for lifting a copper-clad plate is mounted on the upper surface of the base, a U-shaped frame is mounted on the upper surface of the base, a vertically-arranged driving part is mounted on the upper surface of the horizontal part of the U-shaped frame, and a heat insulation cover used for covering the bracket is mounted at the movable end of the driving part. The bottom of the heat insulation cover is open, an electric heating plate used for extruding the copper-clad plate is installed at the top in the heat insulation cover, a horizontally-arranged strip-shaped opening is formed in one side face of the U-shaped frame, a heat insulation plate used for blocking the lower end of the heat insulation cover is inserted in the strip-shaped opening, and a handle is installed at the end, located on the outer side of the U-shaped frame, of the heat insulation plate. The utility model has the beneficial effects that the heat loss is reduced, and the energy consumption is reduced.

The secondary recovery treatment system comprises a drying cabinet and a heat recovery box, three drying cavities are formed in the drying cabinet, electric heating plates are fixedly installed on the two sides of the inner cavities of the three drying cavities, first rotating rollers are rotationally installed on the tops of one sides of the inner cavities of the three drying cavities, and second rotating rollers are rotationally installed on the tops of one sides of the inner cavities of the three drying cavities; rotating rollers II are rotationally mounted at the bottoms of one sides of the inner cavities of the three drying cavities; water vapor dried by the non-woven fabric belt can be conveyed into the heat recovery box through the ventilation cavity, then conveyed into the first gas gathering cover through the communicating pipe and then conveyed into the multiple gas conveying pipes, heat can be conveyed to clean water in the heat recovery box in a heat conduction mode through the gas conveying pipes, and therefore the clean water is heated; therefore, the heat is recycled, the energy utilization efficiency is improved, the production cost is reduced, the environmental protection requirement is met, and the energy waste and the thermal pollution to the environment are reduced.

The invention discloses a cup joint variable pitch plasticizing screw for an injection machine, the cup joint variable pitch plasticizing screw is of a double-layer structure and comprises a plasticizing screw body and a cooling screw body, the inside of the plasticizing screw body is of a hollow structure, the cooling screw body is sleeved with the plasticizing screw body, and the inner diameter of the plasticizing screw body is larger than the outer diameter of the cooling screw body; the plasticizing screw is divided into a plurality of areas in the length direction, and the areas sequentially comprise a supporting sealing area, a first plasticizing area, a second plasticizing area, a third plasticizing area and a melt guiding area. The invention further discloses a multi-injection-hole upper hot plate, an electric control screw rod temperature control device and a mold precision positioning device for the injection machine. The multi-injection-hole upper hot plate has a wide application prospect.

The invention discloses a method for simultaneously determining total barium and sulfur in barite by inductively coupled plasma emission spectrometry. In this method, the sample is decomposed by melting with sodium carbonate and sodium hydroxide. The molten slag is extracted with hot water, nitric acid and a chromium internal standard solution are added, the crucible and the beaker are washed with dilute hydrochloric acid, water is added and shaken well, heated to boiling gently on a hot plate and then taken off and shaken well. After cooling, it is determined on an inductively coupled plasma emission spectrometer. The method of the invention makes use of the characteristic that barium sulfate has a relatively large solubility in reverse aqua regia, enabling barium and sulfur to coexist stably, and then simultaneously determines total barium and sulfur by inductively coupled plasma emission spectrometry, which has the characteristics of high detection efficiency, high precision, simple operation and low cost, and solves the technical problems that when determining total barium and sulfur in barite by traditional methods, sulfur and barium are difficult to coexist in the solution, usually two different methods are required to complete the determination, and even barium and sulfur need to be separated in advance, resulting in a long process and low detection efficiency.

The amorphous motor iron core stamping device comprises a bed base, clamping plates are arranged on the two sides of a top plate of the bed base, a lifting table is vertically connected between the clamping plates in a sliding mode, the top face of the lifting table is connected with a stamping mechanism, a plurality of punches capable of preheating are transversely arranged on the bottom face of the lifting table, the punches right face female dies embedded in the top plate of the bed base, and a conveying mechanism is arranged below the female dies. Driving assemblies are arranged at the two ends of a bed top plate, a film roll seat is arranged at the top of the driving assembly at the head end, an elastic module is arranged on the bottom face of the film roll seat, a tensioning roller is rotationally connected between clamping arms at the two ends of the elastic module and drags a film belt in the film roll seat to the position below a pressing cylinder of the corresponding driving assembly, and the pressing cylinder is in clearance fit with an electric heating plate on the bed top plate. According to the device, the driving assembly is matched with the electric heating plate, a layer of ultra-thin and high-temperature-resistant polymer protection film is pasted on the surface of the amorphous strip, the integrity of the strip is improved, edge burrs are effectively restrained in the stamping process, the yield strength of the material is reduced by preheating the punch, and the stamping quality is further guaranteed.

The electroplating treatment equipment comprises an electroplating box, a fixing frame is fixedly installed on the top of the outer surface of the electroplating box, a hydraulic cylinder is fixedly installed on the top face of the fixing frame, and a lifting frame is fixedly arranged at the output end of the hydraulic cylinder; iron casting fixing mechanisms are fixedly arranged on the two sides of the surface of the lifting frame; cavities are formed in the two sides of the inner wall of the electroplating box correspondingly, and heating mechanisms are fixedly arranged in the cavities. According to the electroplating treatment equipment for iron casting machining, through the arrangement of a heating mechanism and a stirring mechanism, an external power source is communicated, when the external temperature is low, an electric heating plate heats electroplating liquid, the heating temperature is controlled through a temperature controller, when the temperature of the electroplating liquid rises, the conductivity of the electroplating liquid is improved, a servo motor drives an auger rod to rotate, and the electroplating liquid is heated; the electroplating liquid can be in full and uniform contact with the iron casting, so that the effect of improving the electroplating efficiency of the iron casting is achieved.

The silicone composition has a thermal conductivity of 4.0 W / m.K or more and less than 7.0 W / m.K in a hot plate method in accordance with ISO 22007-2, and a viscosity at 25 DEG C of 5-800 Pa * s when measured using a spiral viscometer at a rotational speed of 10 rpm, maintains fluidity and handling properties even when filled with a large amount of a thermally conductive filler in order to impart excellent insulating properties and thermal conductivity, and has excellent thermal conductivity. The heat dissipation performance is excellent, and the durability and reliability under high-temperature or high-temperature and high-humidity conditions are excellent.

The utility model discloses a dual-purpose vulcanizing machine which comprises a base, a plurality of pairs of fixing plates are arranged at the upper end of the base, the plurality of pairs of fixing plates are arranged at equal intervals, the plurality of pairs of fixing plates are connected through a plurality of connecting rods, and mounting through grooves are formed in the plurality of pairs of fixing plates. Vulcanizing equipment is jointly arranged at the upper ends of the multiple mounting through grooves, first vulcanizing mechanisms used for vulcanizing products are arranged at the lower ends of the multiple mounting through grooves in the left side, and second vulcanizing mechanisms used for vulcanizing products are arranged at the lower ends of the multiple mounting through grooves in the right side. Lifting mechanisms used for lifting the two vulcanizing mechanisms are arranged between the multiple pairs of fixing plates. According to the utility model, the lower hot plate and the lower platform are designed into a split mechanism, namely the left flat plate and the left hot plate, and the right platform and the right hot plate, so that the requirement of a customer for producing different products by one device is met.

The utility model provides a vehicle rearview mirror lens with various heating structures, which relates to the technical field of vehicle manufacturing and comprises a rearview mirror and an air duct shell. An electric heating plate is adhered to the back surface of the rearview mirror; a supporting frame is welded to the rear side face of the air duct shell, a driving motor is connected to the rear side face of the supporting frame through bolts, a driving gear is installed on a motor shaft of the driving motor, a driven gear is meshed with the outer side face of the driving gear, a transmission rod is welded to the inner side face of the driven gear, and a fan is installed at the position, close to the front end, of the outer side face of the transmission rod. Through the arrangement of a fan, an electric heating plate, an air duct shell, a driving motor, a driving gear and a driven gear, synchronous work of an outer surface air heating mode and an internal heat conduction mode of the rearview mirror is achieved, and the working efficiency of heating, deicing and demisting of the rearview mirror is improved; the problem that ice and snow on the surface of a traditional automobile rearview mirror cannot be directly heated, so that the ice and snow melting speed and the evaporation speed are low is solved.

The application provides a cleaning method for a boron contaminated ICP chamber, which comprises the following steps: (1) after heating a hot plate, gaseous fluorine source and oxygen are continuously introduced into the ICP chamber until they reach an equilibrium state, then the gaseous fluorine source and oxygen are continuously introduced, and the first etching treatment is performed by turning on the upper radio frequency; (2) chlorine and oxygen are continuously introduced into the ICP chamber, and the second etching treatment is performed by turning on the upper radio frequency, and the cleaning is completed. The application uses gaseous fluorine source as a cleaning gas, utilizes the volatile characteristics of the generated product to clean the boron dirt existing in the chamber, and has a better cleaning effect. Meanwhile, chlorine is introduced into the chamber after the cleaning is completed to stabilize the chamber environment, which can play a role in adjusting the chamber impedance and ensuring the consistency of subsequent processes.