431results about How to "Improve cooling efficiency" patented technology

The invention discloses a method for controlling an inverter compressor. According to the method, a target temperature and a dividing temperature point are preset, and a sensor monitors an actual temperature value. The method comprises the following steps that: a controller judges whether the difference between an actual temperature and the target temperature is zero, and the compressor operates at a minimum frequency for a certain period if the difference between an actual temperature and the target temperature is zero; the controller judges whether the target temperature is reached, and thecompressor stops operation if the target temperature is reached, or the controller initializes a PID parameter to allow an inverter to make the compressor start to raise frequency quickly if the target temperature is not reached; the controller judges whether the preset dividing temperature point is reached, and the PID parameter is adjusted if the preset dividing temperature point is reached, orthe PID parameter is kept constant if the reset dividing temperature point is not reached; and the controller judges whether the target temperature is reached, and the compressor operates at a constant frequency and the frequency inversion is finished if the target temperature is reached, or the compressor raises frequency while keeping the original PID parameter if the target temperature is not reached. Correspondingly, the invention also provides a device for controlling the inverter compressor. The method and the device can realize a quick, energy-saving and stable frequency inversion process at the same time.

The invention discloses a data center, comprising a cabinet and at least one server system, wherein the cabinet is provided with an elevated floor, and the at least one server system is arranged in the cabinet; the server system comprises multiple severs at different heights; and the elevated floor has a ventilating grate hole. The cooling system used for the data center comprises an air conditioner, multiple temperature sensors respectively arranged nearby the exhaust ends of the servers, a group of guide fans arranged nearby the ventilating grate hole of the elevated floor, and a control module electrically connected with the air conditioner, the temperature sensor and the guide fans, wherein the cool air from the air conditioner is injected below the elevated floor; the guide fans can drive the cool air to pass through the ventilating grate hole to flow upwards at an acceleration mode; and the control module adjusts the rotation speed of the guide fan based on the temperature value acquired by the temperature sensor, so as to enable the cool air to be uniformly distributed, and servers at different heights to uniformly cool. Compared with the prior art, the data center provided by the invention can improve the cooling efficiency, so as to save energy.

The invention provides an electronic device utilizing liquid cooling heat radiation. The electronic device comprises a shell, a circuit board and a liquid cooling heat radiation module. The circuit board and the liquid cooling heat radiation module are arranged in the shell. The circuit board is provided with one or multiple heating devices. The liquid cooling heat radiation module comprises a liquid inlet pipeline and nozzles which are arranged on the liquid inlet pipeline. Cooling liquid is conducted into the shell from the outside of the shell by the liquid inlet pipeline. Cooling liquid is sprayed in a space formed by the shell by the nozzles to cool the heating devices. Cooling liquid steam after heat exchange is mixed with cooling liquid sprayed by the nozzles so that the cooling liquid steam is enabled to be condensed. Compared with an existing direct liquid cooling heat radiation device, the electronic device utilizing liquid cooling heat radiation has advantages of being low in demand for cooling liquid, low in weight, simple in system structure, high in heat exchange capability and high in environmental adaptability and has quite high application potential.

The invention provides a process for preparing dimension controllable nano silicon dioxide comprising continuously conveying organic halogensilane, hydrogen, and oxygen by a finite proportion into combustion nozzle then firing chamber, conducting hydrolytic reaction in 1000 deg. C to 2000deg. C flame, subjecting the reaction product to congregation, cyclone air-solid segregation and deacidification post-treatment, and vacuum-packing.

The invention discloses a refrigeration system which comprises an indoor unit and an outdoor unit, wherein the indoor unit comprises a compressor, a first indoor heat exchanger and a second indoor heat exchanger; the outdoor unit comprises an outdoor heat exchanger; an exhaust port of the compressor is connected with one end of the outdoor heat exchanger; the other end of the outdoor heat exchanger is connected with one end of the first indoor heat exchanger; the other end of the first indoor heat exchanger is connected with a gas returning port of the compressor, so that a loop in an air conditioning mode is formed; the second indoor heat exchanger is lower than the outdoor heat exchanger; one end of the second indoor heat exchanger is connected with one end of the outdoor heat exchanger; and the other end of the outdoor heat exchanger is connected with the other end of the second indoor heat exchanger, so that a loop in a heat tube mode is formed. The invention further discloses a refrigeration method of the refrigeration system. The technical scheme meets cooling requirements at different temperatures of working conditions, the refrigeration efficiency is improved, and the purchase cost of equipment is reduced.

The invention discloses a drawer-type microwave oven which comprises an outer cover, a cavity part, a microwave generating device, an air drive part and an air cooling passage, wherein the cavity part is embedded in the outer cover, the front side is open, the cavity part comprises a cavity front plate, an air outlet is formed in the upper part of the cavity front plate, and an air inlet is formed in the lower part of the cavity front plate; and the air cooling passage is formed in space between the outer cover and the cavity part embedded in the outer cover. According to the drawer-type microwave oven, through a design of the air cooling passage between the cavity part and the outer cover, temperature rising of components during a use process of the drawer-type microwave oven is reduced, so that the service life of each component in the drawer-type microwave oven is prolonged.

The invention provides an OLED display device. A plurality of projections are arranged on one surface of a side, positioned close to an OLED device, of a cover plate substrate; outer surfaces of the cover plate substrate and the plurality of projections are wrapped with heat conduction layers, heat radiation area and heat radiation efficiency of a cover plate can be increased, service life of the OLED device can be prevented from being reduced due to heat accumulation, and the cover plate is enabled to be high in mechanical strength; a first heat conducting and light shielding layer including graphene and light shielding material is coated on an outer side of sealing gum, on an area, positioned outside the sealing gum, of the cover plate and on an area, positioned outside the sealing gum, of a base plate; a second first heat conducting and light shielding layer is coated on an area, positioned outside a part corresponding to the OLED device, of a bottom part of the base plate; the OLED display device can be prevented from all-around light leakage while air tightness of the OLED device can be enhanced, external moisture can be effectively prevented from permeating the OLED device, the service life of the OLED device can be prevented from being affected, heat radiation efficiency of the OLED display device can be further improved due to excellent thermal conductivity and electrical conductivity of the graphene material, the OLED display device can be free from static electricity, and product quality can be improved.

The invention discloses a copper/ graphene composite multi-layer heat dissipation film and a preparation method thereof. The heat dissipation film is formed by alternately superposing a graphene layer and a copper layer. The preparation method mainly comprises the following steps: sequentially coating a graphene film and copper on a metal matrix; and finally, dissolving the metal matrix to obtain the self-supported copper/ graphene composite multi-layer heat dissipation film. The heat dissipation film prepared by the method is high in heat dissipation efficiency, and is convenient to use.

The invention relates to a heat-conductive radiating coating coated on an electronic element surface. The heat-conductive radiating coating is prepared from the following materials by weight percent: 10%-30% of a base material, 5%-69% of a heat-conductive radiating material, 20%-70% of a solvent and 1%-20% of an additive. The heat-conductive radiating coating provided by the invention has convenience in use; when the heat-conductive radiating coating is coated on the to-be-radiated elements, such as, copper foil and radiator, the radiating efficiency can be increased and the volume of the product is not increased; the effect is excellent; the radiating efficiency can be increased by 20%-40%.

Disclosed is an intelligent pipeline pressurized type network cabinet and server cooling system. The system comprises a central air conditioner, an air compressor and a network cabinet. The central air conditioner is successively connected with the air compressor and the network cabinet through an air channel, the air channel is divided into a plurality of branch air channels after entering the network cabinet, each branch air channel is arranged near to a server on each shelf in the network cabinet, the cold air nozzles at the end portions of the branch air channels are adjustably arranged at the hot spot positions of the servers according to needs, the connection position of the branch air channels and the main air channel is provided with an adjustable valve, the servers are provided with temperature sensors, the adjustable valves and the temperature sensors are connected with a remote intelligent manager, and the remote intelligent manger is electrically connected with a control interface. According to the invention, cold air is directly transmitted to the centralized hot spot of a data center through a pressurized pipeline for fixed point refrigeration on the hot spot, such that the waste of the cold air during the process of reaching the hot spot is reduced, the hot spot can be accurately aligned, and the refrigeration efficiency can also be improved. Besides, through intelligent control of the control interface, supply according to needs is realized, unnecessary waste is not caused, and the purposes of saving energy, reducing emission and improving economic benefits can be achieved.

The invention relates to an electronic device. The electronic device includes a radiating casing and a heating electronic component which is in heat conduction combination with the radiating casing, wherein an enclosed cavity is formed in the radiating casing; working mediums and a pore structure for absorbing the working mediums are accommodated in the cavity; and the heat generated from the heating electronic component can be radiated through phase change circulation of the working mediums. In the electronic device, as the enclosed cavity is formed in the radiating casing; the working mediums and the pore structure for absorbing the working mediums are accommodated in the cavity; and the heat generated from the heating electronic component can be radiated through phase change circulation of the working mediums, radiating assemblies, such as fans, radiating fins and heat pipes are saved and the space of the electronic device is saved, so that higher radiating efficiency can be guaranteed and the ultrathin requirement for electronic products can be satisfied.

The invention is suitable for the field of heat dissipation technology. The invention discloses heat dissipation coating for dissipating heat of an electric heating device by direct or indirect contact, a heat dissipation fin and a manufacturing method. The heat dissipation coating comprises a carrier layer disposed on the outer surface of the electric heating device; and the carrier layer is uniformly provided with heat transformation layers for transforming the heat into infrared rays. When being in use, the heat dissipation coating is directly or indirectly contacted with the electric heating device through the carrier; the heat energy is transformed into the infrared rays by the heat transformation layers; and further the heat is dissipated, so that heat dissipation efficiency is high. Compared with a conventional heat dissipation coating, the heat dissipation coating provided by the invention can balance the heat dissipation efficiency in active heat dissipation while obtaining smarter size of an electronic product in passive heat dissipation, increase the heat dissipation efficiency of the electronic product, reduces the temperature of a work environment, and can be widely applied in various electronic and electromechanical products.

Disclosed is a thermal-conductive silicone grease with high thermal conductivity and high temperature resistance. The silicone grease comprises, by weight, 60 to 80% of nano modified conductive filler, 15% to 30% of polysiloxane, 1% to 20% of silicone oil and 1% to 5% of additives. The nano modified conductive filler is an inorganic filler through silver powder surface modification treatment; the polysiloxane is an active silicone oil compound; the silicone oil is one or two of dimethyl modified silicone oil and benzyl modified silicone oil; and the additives are one or more of sodium hexametaphosphate, trisodium phosphate and sodium tripolyphosphate. According to the thermal-conductive silicone grease with high thermal conductivity and high temperature resistance, oanoscale conductive filler coated silver powder is the filler, and the prepared thermal-conductive silicone grease with high thermal conductivity and high temperature resistance is not dried, hardened or melted at a temperature of 300 DEG C or even more than 320 DEG C for a long time, had no flavor or odor, and has no corrosiveness to metals of iron, copper, aluminum and the like. The thermal-conductive silicone grease with high thermal conductivity and high temperature resistance has the advantages of being capable of prolonging the service life, being insulating, shockproof, radiation aging resistant and the like, and accelerating the heat conduction speed of electrical devices and improving radiation efficiency.

The invention discloses a radiating device of a multi-chip combined LED (light emitting diode). A plurality of LED light emitting chips are distributed on a substrate; the other side of the substrate opposite to the LED light emitting chips is connected with a T-shaped heat conducting column which is a hollow seal structure; a cavity of the T-shaped heat conducting column is internally provided with a radiating liquid. Through the heat conduction effect of intensifying the radiating device by the radiating liquid, the heat is absorbed by the radiating liquid from the light emitting diode, and is then conducted to a radiator by the T-shaped heat conduction column or in the air, the radiating efficiency is improved, and the problems that the light emitting efficiency is reduced and the service life is shortened caused by insufficient radiation for the multi-chip combined LED are avoided.

The invention discloses a data center task scheduling method based on a dynamic temperature prediction model. The method comprises the steps of firstly initializing parameters of a temperature prediction model; obtaining information such as actual computation node inlet temperature and CPU (Central Processing Unit) use rate; updating the parameters of the temperature prediction model through an updating algorithm; scheduling a batch of incoming tasks. The data center task scheduling method based on the dynamic temperature prediction model overcomes the disadvantages and defects of the current static temperature predication model applied to a task scheduling method, and is applicable to the online task scheduling of a computation intensive data center. The data center task scheduling method based on the dynamic temperature prediction model has the advantages that since factors of temperature and air flow are considered during task scheduling and the parameters of the temperature prediction model are dynamically adjusted according to the feedback information of a temperature sensor, the highest inlet temperatures of all computation nodes are enabled to be as low as possible, the cooling efficiency of a cooling system is finally improved, and the goal of greatly saving energy is achieved.

The present invention discloses a combined type preform taking and cooling manipulator and a method thereof. A cooling cylinder is arranged on the preform taking manipulator. A bottle preform pushed out by an ejector in a die cavity is cooled in the cooling cylinder on the manipulator for the first stage. When the manipulator moves to a position corresponding to a cooling pin, the cooling pin extends into the bottle preform and sprays gas (air) to carry out forced convection cooling for the inner surface of the bottle preform. The adoption of the novel combined cooling mode not only can ensure uniform cooling for the interior and the exterior of the bottle preform, but also can largely improve cooling efficiency. Meanwhile, the present invention adopts the design that the inner circulating pipe of the cooling cylinder integrates arch-shaped grooves and spiral grooves. The design improves the heat absorption area of the cooling cylinder, the volume of cooling fluid passing through the cooling cylinder and the cooling efficiency of the bottle preform, makes the integral cooling of the bottle preform more uniform, and improves the integral quality of the bottle preform.

The invention relates to the technical field of heat dissipation equipment and in particular relates to a heat dissipation protection device for novel electromechanical equipment. The heat dissipationprotection device comprises a shell, wherein two transverse rods are fixedly arranged on the upper side inside the shell; a second belt wheel and a gear are connected to the outer side of a fixing shaft from top to bottom in a sleeving manner; a motor is fixedly arranged in the middle of the upper end on an inner wall of the shell; a first belt wheel is in transmission connection with the secondbelt wheel through a belt; chutes are formed in two sides at the upper end of a two-sided rack; a slide block matched with the chutes is arranged at the lower end of a vertical rod; an air cooler is arranged inside the box body; a U-shaped pipe is arranged at the lower end of a connecting pipe; a plurality of sprayers are arranged on the inner side of the U-shaped pipe; a suction fan is arranged on one side of the shell; and an exhaust fan is arranged on one side, which is far away from the suction fan, of the shell. The heat dissipation protection device disclosed by the invention is uniformin heat dissipation, high in heat dissipation efficiency and simple in structure, the service life of the electromechanical equipment can be greatly prolonged, and the cost is reduced.

The invention discloses a communication equipment chassis. The communication equipment chassis comprises a chassis body and a radiator, wherein the radiator comprises a base plate and a radiating module set; the base plate serves as a back sealing plate of the chassis body; the radiating module set is connected with the back of the base plate and comprises a plurality of radiating modules; each radiating module comprises a plurality of radiating tubes and a plurality of radiating fins; the plurality of the radiating tubes are connected with the back of the base plate; and the plurality of the radiating fins are connected by the radiating tubes. In the communication equipment chassis, a section bar radiator in the conventional equipment chassis is changed into the plurality of the radiating modules which comprise the radiating tubes and the radiating fins; the radiating modules form the radiating module set; the radiating fins are connected by the radiating tubes, so a radiating area is greatly increased compared with the section bar radiator on the premise of the same space volume by increasing the numbers of the radiating fins and the radiating tubes; an overall radiating area is further increased by increasing the number of the radiating modules; the radiating efficiency is increased; and the radiating equipment on the communication equipment chassis is met.

The invention relates to a pneumatic GM refrigerating machine and a control process thereof. The pneumatic GM refrigerating machine comprises a driving cylinder, a refrigerating cylinder, a driving piston, a push piston and a refrigeration capacity heat exchanger, wherein the driving cylinder is vertically connected with the refrigerating cylinder, the driving piston is vertically connected with the push piston, the driving piston can slide in the driving cylinder, a driving cavity is formed between the driving cylinder and the driving piston, the push piston can slide in the refrigerating cylinder, the inner part of the refrigerating cylinder is divided into a room temperature cavity and a low temperature cavity by the push piston, the refrigeration capacity heat exchanger is connected with the lower temperature cavity, the room temperature cavity is connected with a low-pressure gas pipeline and a high-pressure gas pipeline, the driving cavity is at least connected with a low-pressure gas storage and a high-pressure gas storage. Compared with the prior art, on the basis of the original GM refrigerating machine, the low-pressure gas storage and the high-pressure gas storage are arranged on the driving cavity, the movement of the piston is driven to move by the gas in the gas storages, so that the refrigerating efficiency of the refrigerating machine is increased. The pneumatic GM refrigerating machine is simple in structure and easy to operate.

The invention relates to the field of railways, and discloses a cooler for steel rails, which comprises an air cooler for cooling a steel rail head, and air guide plates (4) which are arranged on both sides of the steel rail (1) and extend along the extension direction of the steel rail (1), wherein an air guide space is respectively formed between the air guide plates (4) and the two side surfaces of the steel rail so as to guide the cooling air to flow through the waist (1c) and bottom (1d) of the steel rail downwardly from the steel rail. The cooler has higher cooling rate for the waist and bottom of the steel rail, enhances the steel rail cooling efficiency, and further can enhance the welding quality of the steel rail joint.

The present invention discloses one kind of parallel cooling refrigerator and belongs to the field of cooling-air circulating technology for refrigerator. The refrigerator includes freezing chamber, cold storage chamber installed parallelly to the freezing chamber, partition board to separate the freezing chamber and the cold storage chamber, evaporator to form cooling circulation, separating board to separate the heat exchange space of the evaporator into two parts, freezing chamber cold air passage to feed partial cold air into the freezing chamber, cold storage chamber cold air passage to feed other cold air into the cold storage chamber, and blower for the forced circulation of cold air. The present invention has raised cooling effect, saving in power, raised cold storage chamber cooling speed and maximized cold storage chamber volume.

A power distribution cabinet heat-dissipation system comprises a cabinet body. The whole cabinet body is a hollow cuboid structure. A circulating fan used for circulation of the air inside the cabinet body is installed above a side plate of the cabinet body. The top of the cabinet body is also provided with a water-cooling heat dissipation system. Specifically, the system contains a heat exchanger which is installed on the top of the cabinet body and is used for transferring heat inside the cabinet body to the outside of the cabinet body. A cooling section of the heat exchanger is provided with a cold water coil which is successively connected to a back-water valve, a water tank, a cooling tower, a circulating water pump and finally back to the cold water coil of the heat exchange so as to finish the circulation. Through cyclic cooling of water, the temperature in a power distribution cabinet can be reduced to the maximum. By cycling use of water and the heat exchanger which has no pollution to the environment in the whole system, the system has advantages of high heat dissipation efficiency and high environmental benefit, and belongs to an energy-saving and environmental protection mode.

The invention relates to a cooling device of a lead plate roller. The cooling device comprises a roller with the internal as a tubular cavity structure; multiple semiconductor refrigeration chips are uniformly distributed on the inner surface of the tubular cavity of the roller; refrigeration surfaces of the semiconductor refrigeration chips are tightly bonded with the inner surface of the tubular cavity of the roller; two electrodes of multiple conductor refrigeration chips are at least connected with one ends of two spring copper pieces through lead holes formed in a shaft head after parallel connection; electric brushes are arranged at the other ends of the at least two spring copper pieces, and are electrically connected with at least two annular groove electrodes in a bearing base; and electrode wiring terminals are arranged between the at least two annular groove electrodes and the outer surface of the bearing base. The cooling device of the lead plate roller has such characteristics as relatively simple structure, high cooling efficiency, stable roller operation and safe and reliable use.

The invention relates to a high-power LED (light-emitting diode) lamp module of a chip-on-board. The lamp module comprises an LED light emitting unit, a uniform temperature plate (1) and a heat radiating structure (2), wherein the LED light emitting unit is fixed on the uniform temperature plate (1), the heat radiating structure (2) is fixed below the uniform temperature plate (1); and the lamp module is characterized in that the heat radiating structure (2) and the uniform temperature plate (1) transfer heat by a graphite paste (8). In the high-power LED lamp module, the graphite paste arranged between the heat radiating structure and the uniform temperature plate has excellent heat transfer performance; and compared with a structure in the prior art, the high-power LED lamp module has the advantages that a layer of heat conducting silica gel is omitted, and the heat radiating efficiency is greatly increased.

The invention discloses a single-compressor secondary dynamic refrigeration cold-storage air-conditioning system and a refrigeration method thereof. An exhaust pipe of a compressor of the refrigeration cold-storage air-conditioning system is communicated with a solenoid valve I sequentially through a gas-liquid separator I, a condenser and a liquid accumulator. The single-compressor secondary dynamic refrigeration cold-storage air-conditioning system further comprises a primary refrigeration device, a secondary refrigeration device, a cold exchange and cold supply air-conditioning device. An evaporator of the primary refrigeration device is immersed in a heat exchanger, an outlet of the solenoid valve I is in series connection or parallel connection with the evaporator and a cold-storage barrel and then is communicated with an inlet of a gas-liquid separator II, an outlet of the heat exchanger is communicated with an inlet on the upper portion of the cold-storage barrel sequentially through a water pump I and a solenoid valve II, an outlet on the lower portion of the cold-storage barrel is communicated with an inlet of the heat exchanger, and a liquid outlet and a liquid inlet of the cold-storage barrel are communicated with an inlet and an outlet of the cold exchange and cold supply air-conditioning device. The refrigeration method comprises the steps of compression condensation, primary refrigeration, secondary ice making and cold exchange and cold supply air-conditioning. The single-compressor secondary dynamic refrigeration cold-storage air-conditioning system has the advantages of being high in refrigeration efficiency, low in device primary investment and running cost and high in reliability.

The invention discloses a novel LED (light emitting diode) projection lamp which comprises a rear lamp housing, wherein an opening is formed in the front end of the rear lamp housing; the front end of the rear lamp housing is provided with a front lamp cover in a butting manner, and a lamp cavity is formed in the front lamp cover; a luminous assembly and a reflection cover for reflecting light are arranged in the lamp cavity; the novel LED projection lamp is characterized in that a rainwater temperature control probe for detecting whether raining occurs outside is arranged on the outer wall of the rear lamp housing; an air cooling device is arranged in the lamp cavity outside the reflection cover and comprises an air inlet pipe and an air exhaust pipe which are oppositely arranged on two inner sides of the rear lamp housing and are communicated with the outside; an air suction fan which is connected with the air inlet pipe and is used for blowing external air into the lamp cavity and an air exhaust fan which is connected with the air exhaust pipe and is used for exhausting hot air in the lamp cavity are respectively arranged at the bottom of the rear lamp housing; electromagnetic valves for controlling the air inlet pipe and the air exhaust pipe to be switched on and switched off are arranged in the air inlet pipe and the air exhaust pipe. Due to the arrangement, the novel LED projection lamp is high in heat dissipation performance and waterproofing performance.

The invention discloses a rapid cooling type aircraft ground air conditioning unit and a control method of the rapid cooling type aircraft ground air conditioning unit. The highest cooling speed and the largest cold quantity input improve the rapid cooling and cold supplying capacity of the aircraft ground air conditioning unit, processed fresh air with a certain flow, cleanliness, proper temperature and high hydrostatic pressure is provided rapidly for an aircraft, the fresh air is fed to a cabin of the aircraft through a special air feeding hose, the fastest and best cooling effect is achieved for the cabin of the aircraft which stops at an aircraft boarding bridge for a short time, physiological requirements of staff in the cabin of the aircraft are met, high comfort level is achieved, the cooling requirements of precision devices in the cabin are met, a comfortable environment is provided for the staff in the cabin and aircraft operators, the metal state of the aircraft operators is improved, and the safety of driving the aircraft is improved. Meanwhile, fuel consumption produced when the aircraft waits on the ground is reduced, the service life of a self-matched expensive air conditioning system of the aircraft is prolonged, the pollution to air environment of an airport is reduced, and high economic and social benefits are achieved.

The invention discloses a brake cooling method and a brake cooling device. Collected temperature values of a brake are obtained in real time through a controller (5); when the temperature value of the brake is greater than a preset temperature value, the opening degree of a first electromagnetic valve (4) and the opening degree of a second electromagnetic valve (8) are controlled, so that water in a water tank (1) is atomized and sprayed to the inner side of a brake drum of the brake by an atomizing spray head (7) through pressured air in an air storage tube (2); the goals of regulating and controlling the quantity of cooling water according to the temperature condition of the brake, reasonably and effectively using cooling water, further improving the cooling efficiency, avoiding wet and slippery conditions of the pavement caused by the cooling water and saving water resources are achieved; the goals of atomizing the cooling water and uniformly spraying the cooling water to the inner side of the brake drum are achieved by using the atomizing spray head; the problem of local cracking due to greater temperature differences at the inner and outer sides of the brake drum caused by direct showering type cooling is effectively avoided; and the running safety of vehicles is further improved.

The invention relates to an air film cooling hole structure. The air film cooling hole structure comprises air film holes and a wall surface; and outlets of the air film holes are positioned in the upstream region of the wall surface. The air film cooling hole structure is characterized in that each air film hole comprises a cylindrical section and an expansion section; one end of each cylindrical section is a cold air inlet; the other end of each cylindrical section is connected with one end of the corresponding expansion section; the other end of each expansion section is an outlet of the corresponding air film hole; each expansion section consists of a middle hole and two expansion holes; each middle hole communicates with each expansion hole; in the top view of the wall surface, the two expansion holes of each expansion section are axially symmetric along the corresponding middle hole; and an included angle beta between each expansion hole and the central axis of each middle hole is 10-40 degrees.

The invention discloses an intelligent single line production system for material plasticizing. The intelligent single line production system is used for forming plastic particles into plastic products of hollow structures in an extrusion mode and comprises an extrusion forming machine, a cooling mechanism, a discharge drawing mechanism, a cutting mechanism, a detecting module, a controller and an operation display panel. The extrusion forming machine comprises a machine base, a motor, an extrusion screw, a hopper, a barrel, a die head and heating parts. The cooling mechanism is provided with a plurality of spraying heads. The discharge drawing mechanism is located at the tail end of the cooling mechanism and conveys the plastic products to the cutting mechanism. The detecting module comprises a plurality of temperature sensors, and the temperature sensors detect the temperature of the cooled plastic products at the positions of the barrel, the die head and the cooling mechanism respectively. The controller controls the corresponding heater and the corresponding spraying head to work according to the detected temperature, and therefore the barrel and the die head can maintain the corresponding control temperature, and the spraying heads can provide cooling water of the corresponding flow. According to the invention, the heating temperature of plastic and the flow of the cooling water are automatically controlled, the production efficiency is high, and the quality of the plastic products is high.