271results about How to "Dispersed in time" patented technology

The invention discloses an abrasion-resistant recycled asphalt concrete and a preparation process thereof, relates to the technical field of asphalt concrete processing, and solves the problem that asphalt concrete pavement is prone to ageing due to frequent temperature changes and is prone to large abrasion during use. The abrasion-resistant recycled asphalt concrete comprises the following components in parts by weight: 75 to 80 parts of new aggregate, 5 to 8 parts of SBS modified asphalt, 0.5 to 0.7 part of mineral powder, 20 to 35 parts of a recycled asphalt mix old material, 0.2 to 0.4 part of a regenerating agent, 6 to 10 parts of steel slag, 0.4 to 0.8 part of hydrated lime powder, 1.8 to 2.6 parts of fiber filler, 0.5 to 1.5 part of abrasion-resistant filler, 0.4 to 0.8 part of carbon black, 4.5 to 7.5 parts of sericite particles. The abrasion-resistant recycled asphalt concrete in the invention has good stability in the use process, is not easy to age due to intermittent friction heat generated between the abrasion-resistant recycled asphalt concrete and a wheel, and is not easy to greatly wear.

The invention discloses an anchovy cooking liquor seafood sauce and a preparation method thereof, which are used for solving the problems that the existing anchovy cooking liquor is heavy in bitter fishy smell, poor in mouthfeel and flavor and poor in food safety as well as environment pollution is caused by emission of the anchovy cooking liquor. The anchovy cooking liquor seafood sauce is compounded by the following components in percentage by weight: 70%-80% of anchovy cooking liquor extract, 5%-10% of spirulina powder, 3%-5% of lecithin powder, 0.1%-0.3% of five spice powder, 0.3%-0.7% of monosodium glutamate, 3%-5% of corn starch, 5%-10% of salt, 2%-4% of white sugar, 0.2%-0.5% of disodium succinate and 0.01%-0.03% of antioxidant. The anchovy cooking liquor seafood sauce disclosed by the invention is reasonable in compatibility, low in production cost, delicious in taste, mellow in mouthfeel, full of nutriments, not easy to deteriorate by oxidization and agglomerate and get damp, and long in quality guarantee period. Moreover, all of the various indexes satisfy the national standard, and the food safety is high.

The invention discloses a self-flow castable capable of filling a seam between a shell and a side wall brick of an electrolytic bath, is designed special for an aluminium electrolytic bath and mainly comprises the following components: a carborundum material, a high alumina material, silica micropowderl, aluminium oxide powder and a calcium aluminate cement. The carborundum raw material used by the self-flow castable has high purity, high SiC content, relatively good bath electrolyte erosion resistance and compression strength; high heat conduction coefficients can eliminate a thermal barrierbetween the bath shell and the side wall brick and are favourable for promoting the forming of a side wall brick furnace upper; and good fluidity can guarantee that the castable uniformly fill the seam. Through the features, the self-flow castable can effectively prolong the service lives of the aluminium electrolytic bath and the side wall brick, is not limited by a construction space in castingconstruction, can quickly cast and is not fired at a high temperature in a production process. Therefore, the self-flow castable is a high-efficiency, energy-saving and environment-friendly refractory material.

The invention provides an optical module. The optical module comprises a lower shell and a circuit board attached to the lower shell, wherein an empty groove is formed in the circuit board, and a laser assembly and a silicon optical chip which are attached to the lower shell are arranged in the empty groove; a laser assembly which is in routing connection with the circuit board and is used for emitting light without carrying signals; and a silicon optical chip which is in routing connection with the circuit board and is used for modulating the light which does not carry the signal. In the present application, the empty groove is formed in the circuit board, the laser assembly and the silicon optical chip are arranged in the empty groove, and the circuit board, the laser assembly and the silicon optical chip are all directly fixed on the lower shell so that barriers among the laser assembly, the silicon optical chip and the lower shell are reduced, heat generated by the laser assembly and the silicon optical chip is conveniently dissipated in time, and the working performance of the optical module is not influenced.

The invention discloses a radiating control method for high-voltage power distribution cabinets. The radiating control method includes arranging the power distribution cabinets in electric rooms; arranging a wind channel above each row of power distribution cabinets, and communicating air outlets in the tops of the power distribution cabinets with the wind channels via radiating pipes; arranging wind doors at two ends of each wind channel, enabling the wind doors to be in open states at ordinary times, communicating flow directions of air in the wind channels with flow directions of outdoor air, and enabling hot air in the various power distribution cabinets to flow out of the radiating pipes, to flow into the wind channels and ultimately to be dispersed out of the wind channels; further arranging exhaust pipes above the power distribution cabinets, arranging exhaust fans on the exhaust pipes and positioning the ends of the exhaust pipes on the outsides of the electric rooms; further arranging a cold air cabinet in each electric room, arranging a cold chamber in each power distribution cabinet and communicating the cold air cabinets with the cold chambers in all the power distribution cabinets for a long time. The two ends of each wind channel are positioned on the outside of the corresponding electric room. The exhaust pipes are communicated with the wind channels. Air conditioners are arranged inside the cold air cabinets. The radiating control method has the advantages that good radiating effects can be realized, heat can be radiated by the aid of wind energy in the nature, and accordingly energy consumption is low; normal work of electric components in cabinet bodies can be guaranteed.

The invention relates to a method for synthesizing polyether glycol in a microstructure reactor, which comprises the following steps: respectively pumping oxyalkylene and a catalyst liquid generated by reacting an alkaline catalyst and an initiator into the microstructure reactor composed of a micro-mixer and a retention time prolonging pipe, reacting while controlling the reaction temperature and pressure, neutralizing the reaction solution, adsorbing, degassing and filtering to obtain the refined polyether glycol. The hydroxyl value of the refined polyether glycol is 50-550 mgKOH / g, and the relative molecular mass is 300-3300 g / mol. The method overcomes the defects of long initiation time and low operational efficiency in the intermitted technique, solves the problems of complex equipment, high requirements for technological condition control and long retention time in the continuous technique, implements quick and continuous production, and has the advantages of short reaction time, simple technique, high safety, high controllability, high adjustment flexibility, continuous operation and the like.

The invention discloses a photovoltaic power generation device, which includes a bottom base, a support base and a mounting plate. The support base is fixedly arranged on the top of the bottom base. A rotary base is installed at the center of the top of the support base. A driving motor is mounted on the top of the rotary base. A support rod is fixedly arranged on a rotary base at one side of the driving motor, and an electric lifting support rod is fixedly arranged on the rotary base at the other side of the driving motor, and the support rod and one end of the electric lifting support rod far away from the rotary base are fixedly connected with the bottom of the mounting plate arranged above the rotary base. One end of the mounting plate is fixedly provided with a rainwater collecting tank, and the other end of the mounting plate is equipped with a recovery funnel. In the invention, rain water is collected by the rainwater collecting groove arranged on one side of the mounting plate and is transported to a water storage tank through a delivery pipe where the rain water is stored to provide cooling water resources for a cooling mechanism. The device of the invention is convenient to use, environment-friendly and pollution-free.

The invention discloses a preparation process for a zinc fish-skin collagen polypeptide chelate to overcome the problems of difficultly controllable chelating process, a low chelating rate, low chelate yield and long chelating time in conventional preparation processes for the zinc fish-skin collagen polypeptide chelate. The process provided by the invention optimizes chelation reaction conditions, adds a NaHCO3 solution in chelating process at the same time so as to maintain stability of the pH value of a reaction system, cooperatively uses ultrasonic treatment to improve chelating efficiency and chelate yield and introduces air in chelating process air to maintain stability of chelation reaction temperature. The preparation process in the invention has the advantages of simple steps, capacity of effectively controlling the chelating process and allowing the chelating process to be more stable, short chelating time, a high chelating rate and high chelate yield.

The invention discloses a compound anchovy cooking liquor sauce and a preparation method thereof, which are used for solving the problems that the existing anchovy cooking liquor is heavy in bitter fishy smell, poor in mouthfeel and flavor and poor in food safety as well as environment pollution is caused by emission of the anchovy cooking liquor. The compound anchovy liquor sauce is compounded by the following components in percentage by weight: 70%-80% of concentrated anchovy cooking liquor juice, 1%-5% of citric acid, 5%-10% of soy sauce, 3%-5% of salt, 1%-5% of honey, 1%-3% of white sugar, 3%-5% of cooking wine, 0.1%-0.3% of ground cinnamon, 3%-5% of yeast extract and 0.01%-0.03% of antioxidant. The compound anchovy cooking liquor sauce disclosed by the invention is reasonable in compatibility, low in production cost, delicious in taste, mellow in mouthfeel, full of nutriments and long in quality guarantee period, and is a top-grade sauce for home cooking and food refreshing. Moreover, all of the various indexes satisfy the national standard, and the food safety is high.

The invention discloses a concrete sampling device, which comprises a bottom plate; rollers are fixedly mounted at two ends of two sides of the surface of the bottom of the bottom plate; supporting plates are fixedly connected to two sides of the surface of the top of the bottom plate; sliding chutes are formed in the inner walls of the supporting plates; a sliding plate is connected into the sliding chutes in a sliding manner; a motor box is fixedly mounted at the center of the surface of the top of the sliding plate; a motor is fixedly mounted at the center of the surface of the inner bottomof the motor box; and a power supply is arranged on the surface of the inner wall of the motor box. The invention relates to the technical field of sampling devices. The concrete sampling device canlift taken concrete in time, a through hole can timely dissipate heat generated by the motor box, damping springs can reduce noise generated when the motor operates, a concrete storing box and a sampling tool can be cooled, and meanwhile, a protective casing and a spiral blade can sample the concrete into the concrete storing box at higher efficiency, so that the working efficiency is improved.

The invention discloses a method for synthesizing polyacrylate soap-free emulsion through a micro-reactor. The micro-reactor is used for carrying out synthesis; the micro-reactor is composed of a micro-mixer and a staying reaction tube which are communicated with each other; the method comprises the following specific steps: taking a double-bond acrylic monomer as an oil phase and an alkyl vinyl sulfate sulfonate water solution as a water phase; pumping the oil phase and the water phase into the micro-mixer of the micro-reactor and carrying out emulsifying to obtain a pre-emulsified solution;preparing an initiator water solution; pumping the pre-emulsified solution and the initiator water solution into the micro-reactor and reacting; and after reaction is finished, discharging in a cold water bath, so as to obtain the polyacrylate soap-free emulsion. The micro-reactor is adopted to realize controllable multi-phase micro-scale flowing, and mixing, mass transfer and heat transfer processes of a polymerization reaction process are strengthened, the reaction time is greatly shortened and the polymerization efficiency is improved; the micro-reactor has an excellent heat conduction capability, so that heat released by the reaction is dissipated in time and the control of temperature is realized; and the polymerization and explosion problem caused by the fact that the temperature ofa traditional method is too high is overcome.

The invention provides an optical physiotherapy instrument which is equipped with a liquid filtering mirror that is small in size and high in sealing strength. The physiotherapy instrument is that a wide-spectrum light source is used as a lighting body; a special reflecting cup is used for filtering the generated light through the novel liquid filtering mirror, and therefore, the light which easily leads to heat effect to the skin can be greatly filtered, and the high-energy light wave which is accepted by the patient and has high treatment value can be remained, and a visible light wave section and some near infrared light wave section are covered.

The invention belongs to the technical field of nucleic acid amplification instruments, and particularly relates to a fan module of a digital nucleic acid amplification instrument. The fan module comprises a fan module frame, heat sinks and cooling fins, wherein the fan module further comprises a variable speed fan, a temperature sensor, a temperature controller and a fan speed controller. The variable speed fan, the temperature sensor, the temperature controller and the fan speed controller are electrically connected to each other. The variable speed fan speed and the chip temperature have aone-to-one correspondence relationship. The variable speed fan speed can be adjusted in real time according to the chip temperature, so that the heat dissipation is fast and the heat dissipation process is controlled. The PID algorithm can be combined to accurately control the temperature, and the temperature overshoot is not prone to occur.

The invention belongs to the field of washing machine production devices and particularly discloses a polishing device for a rotating shaft of a washing machine. The polishing device comprises a rack,a polishing motor and a polishing disk. The polishing motor is fixed to the rack. The polishing device further comprises a drive motor, a thread column, a thread piece, a rotation shaft and a fixingpart which can clamp the rotating shaft. The drive motor is fixed to the rack and drives the thread column to rotate. The thread column is rotationally connected with the rack. The end, far away fromthe drive motor, of the thread column is fixedly connected with the fixing part. The thread column is in thread fit with the thread piece. An output shaft of the polishing motor is connected with therotation shaft, the free end of the rotation shaft is connected with the polishing disk, the rotation shaft is provided with a cam, the rack is in sliding connection with a limiting piece which can limit the thread piece from rotating, the cam abuts against the limiting piece, and a spring is arranged between the limiting piece and the rack. The polishing device can polish the rotating shaft of the washing machine uniformly.

The invention discloses a lithium battery pack with a charge-discharge energy protection mechanism, and relates to the technical field of XX. The lithium battery pack is characterized in that the upper surface of a protection box is hinged with a protection cover plate through a pin shaft, the upper surface of the protection cover plate is provided with two groups of symmetrical first heat dissipation holes, and the bottom surface of the protection cover plate is fixedly connected with a fixed frame. The lithium battery pack is reasonable in design structure, the first air bag can achieve an extrusion effect on the lithium battery pack body. The silica gel hemisphere can effectively achieve an anti-vibration buffer effect on the lithium battery pack body, the lithium battery pack body canbe tightly attached through the elastic plate and the second air bag, the protection effect on the lithium battery pack body is achieved, and the service life of the lithium battery pack body is prolonged. Therefore, electric elements in the lithium battery pack body are protected, heat in the protection box can be absorbed and dissipated through the heat dissipation fins, and air is blown into the protection box through operation of the heat dissipation fan.

The invention relates to a power module with double radiators. A lower metal-clad ceramic substrate is fixedly connected with the lower radiator through a copper substrate. A collector of a semiconductor chip is connected with the lower metal-clad ceramic substrate; an emitter of the semiconductor and a gate thereof are connected with an emitter of an upper metal-clad ceramic substrate and a gate thereof, respectively; an upper radiator is fixed to the top of the upper metal-clad ceramic substrate; a printed circuit board which is hollow is mounted on the copper substrate; an emitter outgoing end of the upper metal-clad ceramic substrate and a gate outgoing end thereof are both connected with the printed circuit board; a collector area of the lower metal-clad ceramic substrate is connected with the printed circuit board; the printed circuit board is provided with two electrode holders corresponding to each other and a terminal holder; a housing is mounted on the copper substrate and covers the upper metal-clad ceramic substrate; the electrode holders and the terminal holder penetrate the housing and are disposed on the top of the housing; the housing is provided with a window allowing penetration of the upper radiator. The power module is reasonable in structure, easier to manufacture, lower in manufacturing cost and capable of running efficiently and reliably for a long period of time.

The invention provides an engine accessory belt hydraulic tensioner. The engine accessory belt hydraulic tensioner comprises a plunger and a shell, wherein hydraulic oil is injected into the inner cavity of the shell; a barrel for generating hydraulic damping is arranged in the inner cavity of the shell; the top open end of the shell is hermetically connected with a plunger sleeve of the plunger; an oil pressure damping gap is formed between a plunger rod of the plunger and the inner cavity of the barrel; springs are arranged between the plunger sleeve and the barrel; a one-way valve for preventing the hydraulic oil in the inner cavity of the barrel from flowing reversely is arranged at the bottom of the barrel. The engine accessory belt hydraulic tensioner is applied to an engine accessory belt transmission system, so that the vibration noise of a belt can be effectively lowered, belt wear caused by vibration can be reduced to the maximum extent, the accuracy and reliability of belt transmission are ensured, the service life of the system is prolonged, and the reliability of long-term working is ensured; moreover, the hydraulic oil in the inner cavity of the hydraulic tensioner can be used for effectively lubricating moving components, and heat generated during movement is dissipated in time, so that the service life of the hydraulic tensioner is prolonged.

The invention provides an LED spotlight. The LED spotlight comprises a lamp holder, a lamp cup body and a lamp cover, wherein a heat dissipation part, a power source and an LED light source are arranged in the lamp cup body, a plastic baffle is arranged below the LED light source, the lamp cup body is a glass lamp cup body, lattice patterns are arranged on the inner surface of the glass lamp cup body, a reflective dielectric film is arranged on the lattice patterns in a plating mode, and the lattice patterns carry out light distribution according to the light-emission characteristic of the LED light source, and carry out light reflection on light of the LED light source to form a fixed light beam angle. According to the LED spotlight, due to the fact that the glass lamp cup body serves as an outer shell, the situation that a lens or a reflection cup is installed additionally to achieve the directional light beam angle is not needed, and the LED spotlight is simple in structure, low in cost, long in service life and good in lighting effect.

The invention relates to a roller motor and a use method thereof. The roller motor comprises a fixed shaft, bearing components arranged on both ends of the fixed shaft to bear a radial load, a roller which is arranged outside the fixed shaft and is capable of rotating around the fixed shaft through the bearing components, a stator component which is arranged on the fixed shaft, and a rotor component which is arranged on the roller and is opposite to the stator component. According to the invention, when the motor is used, some components can be reduced; the use is very convenient; a fan is designed in the motor to dissipate heat inside the roller motor timely.

The invention discloses a strengthened heat transfer type ternary bending torsion micro convex end face mechanical seal structure. Ternary bending torsion micro convexes arranged in the circumferential direction according to the center of the end face to form ring belts are machined on the end face of a movable ring or a static ring of a mechanical seal; each ternary bending torsion micro convex is a micro cylinder with the cross section in the wing shape; and relative torsion exists between every two adjacent cross sections on the ternary bending torsion micro convexes. The long axes of the cross sections of the ternary bending torsion micro convexes are arranged in the circumferential direction of the end face; the short axes of the cross sections of the ternary bending torsion micro convexes are arranged in the radial direction of the end face; the end face of the leeward side of the front micro convex on the ring belts is located on the inner side of the end face of the windward side of the back micro convex; a ring direction flow channel is formed between every two adjacent rows of ring belts, and fluid flows into the ring direction flow channels through the micro convexes and generates strong vortex in the ring direction flow channels; every two adjacent rows of ring belts of the ternary bending torsion micro convexes are arranged in a staggered manner; and the position, close to the leakage side, on the sealed end face is provided with an annular sealing dam; and the height of the sealing dam is equal to that of the ternary bending torsion micro convexes.

The invention discloses a vehicle-mounted inverter which comprises an inverter main body, a socket, a USB interface, a switch and a cigarette end plug, wherein a first outer shell and a second outer shell are arranged outside the inverter main body; clamping tracks are formed between the first outer shell and the inverter main body and between the second outer shell and the inverter main body; a clamping structure is arranged at the upper end of the second outer shell; a plurality of heat radiation vent holes are formed in the inverter main body. The cigarette end plug is directly mounted on the inverter main body, so that the cigarette end plug is close to a storage battery, and sufficient voltage is ensured when load is output from the vehicle-mounted inverter; due to adoption of the clamping tracks, the first outer shell and the second outer shell can move upwards and downwards, the second outer shell is made of an elastic material, the opening of the second outer shell can be reduced due to the clamping structure arranged at the upper end of the second outer shell, then the second outer shell can sleeve the cigarette lighter of a vehicle, the vehicle-mounted inverter can be fixed, and the situation that accidents can be caused as the vehicle-mounted inverter is shaken off in the jumping running process of the vehicle can be avoided.

The invention discloses a tubular heat exchanger with an inert coating layer and application to titanium sponge production. The tubular heat exchanger can be used for quickly rejecting heat generated from a magnesiothermic reduction reaction and gathered in a liquid magnesium central area, so that the titanium tetrachloride feeding amount can be multiplied; meanwhile, the inert coating layer on the surface of the tubular heat exchanger always remains in a solidification state, thereby preventing formation, deposition and attachment of a titanium crystal on the metal surface of the tubular heat exchanger, and preventing bonding of a titanium lump and the metal surface of the tubular heat exchanger; and after the reduction is finished, the coating layer is melted and drops off, and a cavity is formed in the axis position of the titanium lump, so that the titanium sponge distillation period can be shortened by half or above. By adoption of the tubular heat exchanger provided by the invention, the titanium sponge production efficiency is multiplied, the power consumption cost is greatly reduced, and a prerequisite is provided for further enlargement of a furnace profile.

The invention discloses a disk brake shield, which comprises a shield body that is arranged on a disk brake assembly, the shield body is internally provided with a groove structure which is matched with the disk edge part, and the shield body covers the upper part of the disk in a semi-closed shape through the groove structure. The disk brake shield has simple structure and convenient installation, can not only protect the disk brake but also not impede the maintenance of the disk brake and has good dust-proof effect as well as certain heat dissipation effect and decorative effect.

The invention discloses an AC low-voltage draw-out switch cabinet convenient for maintenance of parts and components, and belongs to the technical field of electric power equipment. The AC low-voltage draw-out switch cabinet comprises a cabinet body. The bottom part of the internal cavity of the cabinet body is provided with a separating plate. The top part of the separating plate is connected on the top part of the internal cavity of the cabinet body. The right end of the separating plate is provided with a bus chamber. The left side wall of the separating plate and the left side wall of the internal cavity of the cabinet body are provided with slide rails. Draw-out switch cabinets are arranged between the two groups of slide rails. The draw-out switch cabinets and the bus chamber are arranged to be separated so that targeted maintenance is facilitated. Wiring of each draw-out switch cabinet is enabled to be independent by a wire arrangement plate arranged behind the draw-out switch cabinets so that later maintenance is facilitated. Photo-induction lamps are arranged on the left and right side walls of the internal cavity of the draw-out switch cabinet so that an operator does not need to carry a professional lighting device in maintenance. Heat radiation holes are arranged on the rear wall of the cabinet body so that heat generated by the switch cabinet can be timely radiated.

The invention discloses an Internet of Things intelligent acquisition terminal box, which comprises an acquisition terminal box body, wherein a circuit mainboard is fixedly installed in the acquisition terminal box body, and a surge protector, an air switch, a five-hole socket, a relay and a 220 V collector are installed on the surface of the circuit mainboard. According to the Internet of Things intelligent acquisition terminal box, through an Internet of Things acquisition controller installed on the circuit mainboard in the acquisition terminal box body and an Internet of Things acquisition terminal system installed in the Internet of Things acquisition controller, daily comprehensive management, including equipment fault monitoring, patrol management, resource management, graded early warning, intelligent diagnosis and analysis, network topology analysis, asset management and engineering construction management of all on-site electromechanical equipment is facilitated, an integrated comprehensive intelligent operation and maintenance management system is established, whole network resource state monitoring and unified management are realized, a brand new equipment Internet of Things intelligent management platform is created, thus data transmission is safer, and equipment operation and maintenance is more efficient, more convenient and more intelligent.

The invention discloses a radix ophiopogonis drying device, comprising a machine frame, wherein a conveying system is arranged on the machine frame; the conveying system comprises at least two belt wheels which are fixedly arranged on the machine frame, and an annular conveying belt; the axes of the belt wheels are mutually parallel; the conveying belt is intertwined between the belt wheels; a heat source cavity is also arranged in a hollow area of the conveying belt; the heat source cavity is connected to a hot air circulating system; the hot air circulating system comprises a circulating pipeline, an electric heating device and an axial flow fan; the circulating pipeline and the heat source cavity form a closed annular air circulating pipeline; the electric heating device and the axial flow fan are arranged in the annular air circulating pipeline; a material charging opening and a material discharging opening are respectively formed in the material charging end and the material discharging end of the conveying belt. The device is simple in structure, and applicable to the popularization of radix ophiopogonis surface drying equipment in the field of application by peasant households and small workshops.

The invention discloses a durable saw blade. The durable saw blade is characterized in that the durable saw blade comprises a saw blade body; saw teeth are continuously arranged on the two sides of the saw blade body in the axis direction, each saw tooth is formed by continuously arranging a left tooth, a middle tooth, a right tooth and a U-shaped groove in the axis direction of the saw blade body; the two ends of the saw blade body are each provided with a handle; and the surface of the saw blade body and the surfaces of the saw teeth on the two sides are evenly coated with ceramic coatings. The durable saw blade has the beneficial effects that the TiC-TiB2 ceramic coatings are arranged on the surface layer, so that the saw blade has the advantages of being high in wear resistance and hardness; the durable saw blade is easy to manufacture, convenient to operate and high in work efficiency; by means of the arrangement of the U-shaped grooves, chips generated in the use process of the saw bladed can be cleared away in time, and heat generated by friction can be dissipated out in time; and the work efficiency is high, and the service life is long. Rubber layers are arranged on the handles, and therefore the hurt of steel pieces to the hands of workers is effectively relieved, and unnecessary accidents are avoided.

The invention discloses a device suitable for natural convection heat dissipation of the surface of a shell of a refrigerator compressor. According to the device, grooves matched with fins are formed in the circumference of an upper shell of the compressor, and grooves matched with heat pipes are formed in the upper shell of the compressor in the vertical direction. The heat pipes are divided into two types, the heat pipes in one type are cylindrical, the multiple cylindrical heat pipes are arranged, and the cylindrical heat pipes and cylindrical portions of the arch-shaped heat pipes are evenly and vertically arranged on the circumference of the upper shell of the compressor. The cooling fins are divided into two types and are the large inner ring cooling fins and the small inner ring cooling fins. The diameter of an inner hollow ring of each large inner ring cooling fin ranges from 163 mm to 164 mm, and the diameter of an inner hollow ring of each small inner ring cooling fin ranges from 30 mm to 32 mm. By the adoption of the device, the heat pipes are arranged on the upper surface of the shell of the compressor, heat is rapidly transmitted in the heat pipes and conducted to the cooling fins for natural convection heat dissipation, the shape and the intervals of the fins and ventilation openings are reasonably designed, natural convection heat dissipation is enhanced, and the device is simple and efficient.

The invention relates to a battery pack cooling system. The battery pack cooling system comprises a battery module, a snakelike liquid cooling pipeline and a phase change material, the battery module comprises a plurality of single batteries and a nickel strap; the snakelike liquid cooling pipeline comprises a cooling medium, a snakelike flow channel, a water inlet and a water outlet, wherein the water inlet and the water outlet are formed in the two ends of the snakelike flow channel respectively. A plurality of honeycomb structures with notches are arranged in the phase change material; each honeycomb structure is provided with one single battery; the snakelike flow channel is embedded in the phase change material through the notch, and the snakelike flow channel is uniformly wound on the periphery of each single battery. According to the invention, the paraffin-graphite composite phase change material is coupled and applied to a power battery thermal management system. The structure not only can fully utilize the high latent heat of the phase change material to absorb heat, but also can timely dissipate the gathered heat through a medium circularly flowing in the snake-shaped flow channel. And when the battery pack works at a low temperature, the system can also play a good heat preservation role.

The invention discloses positive paste containing secondary-layer graphene and a preparation method of the positive paste. The positive paste comprises a main material, a solvent and an additive, wherein the content of the main material accounts for 56-59wt%, the content of NMP accounts for 21-24wt%, the content of PVDF accounts for 2-3.5wt%, the content of SP accounts for 15-17wt%, the content ofthe secondary-layer graphene accounts for 0.7-1.2wt%, the secondary-layer graphene comprise multi-layer sheet-shaped graphene and diamonds, the diamonds are arranged between adjacent two layers of the multi-layer sheet-shaped graphene and are in one-to-one correspondence to carbon atoms of the multi-layer sheet-shaped graphene, and the weight ratio of the secondary-layer graphene and the diamondsis (18-19):1. The positive paste is reasonable in formula and excellent in heat conductivity, the secondary-layer graphene is a new material of 3-5 layers of sheet-shaped graphene doped with the diamonds, the added diamonds are spherical carbon, so that adjacent layers of the multi-layer sheet-shaped graphene are conducted, and the electrical conductivity of the material is improved; and therefore, the thermal conductivity is improved under the condition that other structures of a battery are not changed, heat generated by power generation is timely dissipated, and the energy consumption is effectively reduced when the battery is discharged with a relatively large current.