118results about How to "Reduce the working environment temperature" patented technology

This invention belongs to refractory material field. It is concerned with a kind of high thermal conductivity silicon carbide grouting material combined with sol used for bottom leveling of blast furnace. The raw material component proportion of high thermal conductivity silicon carbide grouting material combined with sol is that 55-65% of 98 silicon carbide particle,10-20% of 98 silicon carbide powder, active a The invention discloses a novel coating material to be applied at the bottom of blast furnace with ingredients as follow: 8 to 14 percent of alumina powder, 0 to 3 percent of graphite, , 0.3 to 0.7 percent of curing agent, 0.5 to 0.8 percent of dispersing agent, and 10 to 14 percent of silica solution. The high-thermal conductivity silicon carbide pouring material described in this invention is easy to be constructed with short construction period, high thermal conductivity, high flatness, and long volume stability. Also the novel coating material is difficult to deform with strong anti-corrosion ability and without environment pollution, which is a novel coating material to be applied at the bottom of blast furnace.

The invention discloses a control method of a heat pump dryer cooling fan and a heat pump dryer. The heat pump dryer comprises a heat pump unit, a drum driving unit, an air supply fan, a control unit and a cooling fan, wherein the heat pump unit comprises a compressor, a condenser, a throttling device and an evaporator, and the control unit is provided with a time module and a storage module. Before the heat pump unit is operated, whether the cooling fan is turned on or not is judged according to the temperature of testing environment. The temperature of a condenser coil of the heat pump unit is detected during operation, and the cooling fan is controlled to be turned on or off according to detected different temperature points so as to regulate the workload of the heat pump unit. The control method has the advantage that the drying control mode can be effectively regulated, thereby reducing energy consumption and drying time in the process of drying and increasing the drying efficiency.

The invention provides a servo power supply which is applied to an electromechanical servo system and belongs to the electromechanical field. The servo power supply source comprises a lithium battery pack (1) and a power supply management unit (2). The power supply management unit (2) is composed of a main control unit (2.1), a monomer voltage detection unit (2.2), a battery equalization management unit (2.3), a battery thermal management unit (2.4) and a peak compensation unit (2.5). The lithium battery pack (1) provides a power supply required by the electromechanical servo system. The power supply management unit (2) carries out peak current compensation and regeneration energy absorption, and carries out system management and equalization on the lithium battery pack (1). The servo power supply provided by the invention can work for a long time, can be reused, has the advantages of large capacity, high reliability, low cost and small volume, can absorb regeneration energy, can carry out large pulse discharge, and is especially suitable for an aerospace servo power supply system.

The invention discloses a circular oil-submerged pump cable which comprises a supporting core, a plurality of wires, a polytetrafluoroethylene wrapping layer, an oil-proof layer, a sheath layer and an armor layer. Each wire comprises a conductor located in the middle and an insulating layer wrapped on the conductor, and the cross section of each wire is in a sector shape. The wires surround the supporting core to be longitudinally arranged in parallel to from a cable core with the circular cross section. The inner arc of each wire tightly abuts against the periphery of the supporting core, and the side faces of every two adjacent wires abut against each other. The cable core is wrapped by the polytetrafluoroethylene wrapping layer. The polytetrafluoroethylene wrapping layer is wrapped by the oil-proof layer. The oil-proof layer is wrapped by the sheath layer. The sheath layer is wrapped by the armor layer. The circular oil-submerged pump cable is compact and stable in structure, resistant to high temperature, even in magnetic field distribution, excellent in oil-proof performance and capable of being used safely in the oil well environment for a long time.

The invention relates to a cooling system for an electrical device. The cooling system comprises the electrical device, a gas removal tank, an expansion tank, a pump, a filter and a refrigeration device which are connected through a first pipeline to form an enclosed loop, wherein the refrigeration device comprises a first heat exchanger, a compressor, a second heat exchanger and a throttling element which are successively connected through a second pipeline to form an enclosed loop; the first pipeline is internally provided with a cooling liquid for heat exchange with the electrical device; the second pipeline is internally provided with a refrigerant; and the refrigeration device performs heat exchange with the cooling liquid in the first pipeline and external air through the refrigerant. The cooling system provided by the invention enables cooling of an electrical device to not relay on environment air temperature, overcome the defects in the prior art, reduces working environment temperature of the electrical device, and improves the service life of the devices in the electrical device, therefore, the adoption of high temperature resistant components is unnecessary, and the product cost is also saved.

The invention discloses a mechanical ventilation device and method for an underground stereo garage. The device comprises externally-hung exhausting shafts arranged on the overall two sides of the underground stereo garage and a ground garage and exhaust fans arranged in the externally-hung exhausting shafts. A garage bottom air duct communicated with the externally-hung exhausting shafts on the two sides is arranged at the bottom of the underground stereo garage. The portions, opposite to the ground garage, of the externally-hung exhausting shafts are provided with ground air outlets. Under the effect of the exhaust fans, outdoor air flows through the ground garage into the underground stereo garage, and after reaching the garage bottom air duct, the air flows into the externally-hung exhausting shafts and is exhausted through the ground air outlets. By the adoption of the device and method, under the automobile taking and parking working condition or the automobile taking and parking waiting working condition, the peculiar smell in the underground stereo garage can be effectively diluted and exhausted rapidly, the influences caused by harmful gas in the underground stereo garage on persons going in and out of the underground stereo garage can be effectively reduced, and the environment temperature of equipment such as transformers in the underground stereo garage is remarkably reduced.

In a method for adjusting a fan of an electronic device, a sensor of the electronic device detects an instant work environment temperature of an electronic component of the electronic device. The detected temperature is obtained from the sensor. The speed of the fan under the detected temperature and a speed of the fan to which it may be adjusted is computed using a predefined algorithm based on prestored values, obtained from experimentation. The fan is adjusted to achieve a heat dissipation mode and an energy-saving mode of the electronic device accordingly.

The invention discloses a high-altitude lithium battery protection device which comprises a lithium battery box, a gas pressure pump and a gas pressure sensor; the lithium battery box adopts an airtight box; the gas pressure pump is arranged outside the lithium battery box and is communicated with the inside of the lithium battery box; the gas pressure sensor is arranged inside the lithium battery box. The high-altitude lithium battery protection device disclosed by the invention has the benefits that through arranging the gas pressure pump, a gas pressure detector and the airtight box, the stability of gas pressure in the working environment of a lithium battery is ensured, so that the short circuit caused by the damage of the lithium battery due to a reduction in the ambient gas pressure can be avoided, therefore, the use safety of the lithium battery in a high-attitude area is improved.

The invention discloses a blast combustor. A furnace end base is provided with a gas ejection pipe and a gas spray pipe communicating with the gas ejection pipe and protruding out of the furnace end base; a gas nozzle capable of spraying gas in the gas spray pipe is arranged above a panel; the furnace end base is also connected with an upper furnace end cover defining an air flowing cavity together with the furnace end base; the outer side of the gas spray pipe is sleeved by the upper furnace end cover, and an air flow passage communicating with the air flowing cavity is formed between the upper furnace end cover and the outer wall of the gas spray pipe; a blast blower capable of introducing external air to the air flowing cavity is connected to a furnace end and below the panel; the upper furnace end cover is connected with a distributor on which a mixed gas flow passage capable of allowing air in the air flow passage and gas in the gas nozzle to pass through is arranged on the distributor; and the upper end of the mixed gas flow passage is connected with a fire cover. By using the blast combustor, gas leakage and backfire are effectively avoided, primary air is replenished sufficiently, and the blast blower is far away from the gas nozzle and is low in temperature rise and high in reliability.

The invention provides a ventilation cooling crystallization tower. Air is adopted as the coolant by the tower, cooling and crystallization of the solution are ended by contact and heat exchange through the mixing of air directly with a solution, the tower comprises tower equipment, an air blower and circulation pump equipment; a demister, a liquid distributor, a filling layer, a guide cone and a guide tube are arranged in the tower equipment; the function of the demister is for removing liquid drops entrained by air, reducing material losses and protecting the environment; spiral nozzles are adopted by the liquid distributor, the liquid distributing effect is good, and blocking is not easily incurred, the function of the filling layer is for improving the contact area of air and the solution, and improving the cooling effect; the function of the guide cone and the guide tube is for improving the crystallization effect and preventing the crystallization and hardening. The ventilation cooling crystallization tower is significant in improving the cooling and crystallization effect, significant in reducing energy consumption, and has the advantages of being large in production capacity, environmentally friendly and pollution-free, simple in operation and the like.

The invention discloses a distribution method of underground high-pressure air, which is applicable to the distribution of high-pressure air needed by pneumatic devices and tools in the operations of underground excavation and passageway reconstruction, etc. The invention adopts a proposal that a compressor station is arranged inside a branch return airway which is connected in parallel to a main return airway, and a filtering apparatus is arranged at the intake side of the compressor to filter the ventilation air methane to change the ventilation air methane into clean air which meets the standards required by the compressor. The filtering apparatus is provided with three air valves which are arranged in the intake airway of the compressor, wherein, the space between the air valves is 3 to 5 meters; a water curtain is arranged at the first air valve; each air valve is provided with an air filter screen. The distribution method of underground high-pressure air in the invention is capable of improving the efficiency of the underground air compressor system, improving the working environment of the compressor, and ensuring the supply of the high-pressure air without consuming the fresh air underground.

The invention discloses an underground stereo parking garage and a natural ventilation method thereof. The garage comprises the underground stereo parking garage, a ground parking room and an underground stereo parking garage mechanical ventilation device, wherein the ground parking room is arranged above the underground stereo parking garage; a vehicle inlet and a vehicle outlet are formed in the ground parking room; the underground stereo parking garage mechanical ventilation device comprises externally hung exhaust well channels arranged on the two sides of the integral body of the underground stereo parking garage and the ground parking room, and exhaust fans arranged inside the externally hung exhaust well channels; a garage bottom air flue communicated with the externally hung exhaust well channels on the two sides is arranged at the bottom of the underground stereo parking garage; a ground air outlet is formed in the position, relative to the ground parking room, of each of the externally hung exhaust well channels. According to the underground stereo parking garage and the natural ventilation method thereof, the peculiar smell of the underground stereo parking garage can be effectively and quickly diluted and removed no matter in the vehicle taking-out and placing-in condition and the condition that users wait for taking out and placing in the vehicles, and the environment temperature of equipment such as a transformer inside the underground stereo parking garage is remarkably decreased.

The invention discloses split-type air conditioner energy saving and pressure reducing equipment. The split-type air conditioner energy saving and pressure reducing equipment includes an intelligent control box and an energy saving device, and the intelligent control box includes a main control module, a water pipe, an electromagnetic valve and a power module; the water inlet end of the water pipeis connected with a tap water pipe, the water outlet end of the water pipe is connected with the water inlet of the energy saving device, and a water outlet of the energy saving device is aligned with a heat dissipation port of an air conditioner outdoor unit; the main control module is connected with the electromagnetic valve and the power module, the power module is connected with the electromagnetic valve, and the electromagnetic valve is installed on the water pipe; and the main control module controls the electromagnetic valve to open a valve door, and the energy saving device sprays tapwater onto heating elements in the air conditioner outdoor unit. According to the split-type air conditioner energy saving and pressure reducing equipment, by spraying cooling of the air conditioneroutdoor unit, the current working environment temperature of the air conditioner is lowered, the working efficiency of the air conditioner is improved, the cooling capacity is greatly improved, the cooling power consumption is reduced, the air conditioner energy efficiency ratio is improved, startup times of a compressor are reduced, and thus the effects of energy saving and electricity saving areachieved.

The invention discloses an underground stereo garage natural ventilation method. The underground stereo garage natural ventilation method includes that a ground parking house is arranged above an underground stereo garage, a garage outer side ventilating duct and a garage bottom ventilating duct are respectively arranged the outer side of the periphery of the underground stereo garage and below the underground stereo garage, a ground parking house outer side ventilating duct communicated with the garage outer side ventilating duct is arranged on the outer side of the periphery of the ground parking house, a top natural ventilation port is formed in the top of the ground parking house, a plurality of inner side natural ventilation openings and a plurality of outer side natural ventilation openings are respectively formed in an outer wall and an inner wall of the ground garage outer side ventilating duct, and a plurality of underground parking space ventilation openings respectively corresponding to all underground parking units are formed in an inner wall of the garage outer side ventilating duct. The underground stereo garage natural ventilation method can achieve through type overall natural ventilation and air change for the underground stereo garage whether under parking and car fetching work status or under non-work status, effectively dilutes and excludes leaked oil gas odor and peculiar smells in the underground stereo garage, reduces device environment temperature in the underground stereo garage, and enhances smoke exclusion ability in a fire disaster.

The invention relates to the technical field of aluminum electrolysis, in particular to a method controlling a cell voltage of an electrolytic cell and a clamping frame position. The technical problems that an existing cell voltage and clamping frame position control method is not reasonable, operation for lifting a clamping frame is complicated, and efficiency is low are solved. A device in use comprises a clamping frame and at least one aluminum tube anode arranged in the clamping frame and internally provided with a plurality of conductors; the aluminum tube anode comprises an aluminum tubein which the plurality of conductors in contact with the aluminum tube are arranged; at least one anode lifting mechanism connected with the clamping frame and used for adjusting the cell voltage isfurther included; the clamping frame is provided with a plurality of first pressing mechanisms in contact with the aluminum tube; at least one detecting unit is arranged around the clamping frame, andthe detecting unit, the first pressing mechanisms and the anode lifting mechanism are all connected with the control system; and a cell voltage signal of the electrolytic cell is acquired and input into the control system.

The invention discloses an underground stereo garage natural ventilation system. The underground stereo garage natural ventilation system is characterized in that a ground parking house is arranged above an underground stereo garage, a garage outer side ventilating duct and a garage bottom ventilating duct are respectively arranged on the outer side of the underground stereo garage and below the underground stereo garage, a ground parking house outer side ventilating duct communicated with the garage outer side ventilating duct is arranged on the outer side of the ground parking house, a top natural ventilation port is formed in the top of the ground parking house, a plurality of inner side natural ventilation openings and a plurality of outer side natural ventilation openings are respectively formed in an outer wall and an inner wall of the ground parking house outer side ventilating duct, and a plurality of underground parking space ventilation openings are respectively formed in an inner wall of the garage outer side ventilating duct from the top down. The underground stereo garage natural ventilation system can achieve through type overall natural ventilation and air change for the underground stereo garage whether under parking and car fetching work status or under non-work status, can effectively dilute and exclude peculiar smells in the underground stereo garage, significantly reduces environment temperature of devices of a transformer and the like in the underground stereo garage, and enhances smoke exclusion ability in a fire disaster.

The invention relates to a non-concealed type distribution box. Blind windows are arranged on a panel of the distribution box. Air convection can be formed by left and right shutter ventilation windows in the distribution box, the working environment temperature in the distribution box can be effectively lowered, a good working environment can be provided for electrical apparatus elements in the box, simultaneously, in order to prevent worms and the like from crawling into the distribution box through the blind windows, gauze meshes are arranged on inner sides of the blind windows, so that the worms and the like can be effectively prevented from entering the box, and safe working of the distribution box is effectively guaranteed.

The invention relates to a seabed observation equipment integrated adapter. The adapter is a pressureproof sealing cavity body, including a front end cover, a cylinder body and a back cover connected in sequence, wherein multiple output water sealing connectors and an input water sealing connector are assembled on the front end cover; an integrated adapter main board, two radiating plates and a radiating plate bracket are arranged in the cylinder body; the radiating plate bracket comprises a front supporting block, a back supporting block and four connecting rods; the two ends of the two radiating plates are fixed to the front supporting block and the back supporting block through a spring supporting base and a spring; the integrated adapter main board and multiple equipment interface boards are mounted on each radiating plate; and the integrated adapter main board is in bidirectional communication with the equipment interface boards and the input water sealing connector separately. According to the seabed observation equipment integrated adapter, the working environment temperature of an internal functional circuit is effectively lowered, and the service life and operating stability are improved; the thermal resistance between a heating device on an internal circuit module and the sea water outside the pressureproof sealing cavity body is effectively lowered through a spring compressing mode, and the internal environment temperature is further lowered; and meanwhile, the requirements on the matching process of the cylinder body and the bracket is lowered as well, so that the assembling is simpler and more convenient.

The invention discloses a multipurpose flat-plate-type solar device manufacturing method and further discloses a multipurpose flat-plate-type solar device manufactured according to the method. The multipurpose flat-plate-type solar device comprises a plate-type box body, a heat collection assembly, a ceramic hot water storage tank and a solar assembly. Processes in the method are concise, the method is easy to achieve and low in cost, and the multipurpose flat-plate-type solar device can be quickly produced accordingly. The multipurpose flat-plate-type solar device is ingenious and reasonable in structural design; because the heat collection assembly and the solar assembly are ingeniously combined, solar energy can be fully utilized so that power and heat can be generated; the multipurpose flat-plate-type solar device is high in energy utilization ratio, meets requirements for electric energy and heat energy in living of people and production, energy is saved, using cost is greatly reduced, energy conservation and environment protection are facilitated, convenience is brought to living of people and production, and therefore the multipurpose flat-plate-type solar device can be widely popularized and used.

The invention provides a vacuum pipe type vibration feeding machine, which comprises a feeding pipe body and a shock excitation device, wherein the shock excitation device comprises two eccentric vibration motors and a thrust plate, the eccentric vibration motors are fixedly arranged on the thrust plate, the thrust plate is fixedly arranged on the outer wall of the feeding pipe body, the two ends of the feeding pipe body are respectively provided with a feeding opening and a discharging opening which are respectively connected with an outlet of a material cabinet and an inlet of a discharging slide pipe, position limiting mechanisms are arranged at the two sides of the feeding opening, and are fixedly arranged on a connecting support frame, a vibration reduction spring is arranged between the connecting support frame and the feeding pipe body, the vibration reduction spring supports a vibration reduction frame, the vibration reduction frame is fixedly arranged on the feeding pipe body, the feeding pipe body carries out periodic reciprocating vibration under the effect of the eccentric vibration motors, and in the steel liquid vacuum processing period, the upward moving space of the vibration reduction frame is limited through the position limiting mechanisms, so that the feeding machine maintains the balanced state and the normal feeding capability, the distance between a discharging opening of the vacuum hopper and a feeding opening of a vacuum groove system in the horizontal direction can be shortened, and the vacuum pipe type vibration feeding machine has the characteristics that the fault rate is low, and the overhaul and the dismounting are convenient.

The invention relates to the technical field of production of continuous casting machines and discloses an electromagnetic stirring device used for a continuous casting machine. A machine body is sequentially provided with a crystallizer, a tundish and a steel ladle from bottom to top. A cooling mechanism is fixedly installed at the bottom of the steel ladle, and the tundish is fixedly installed on the lower surface of the steel ladle. The crystallizer is fixedly installed at the bottom of the tundish. A stirring device is fixedly installed in the crystallizer. A blank discharging roller way is fixedly installed on the right surface of the stirring device. By means of the electromagnetic stirring device used for the continuous casting machine, the stirring device is adopted, on the basis of an original electromagnetic stirring structure, an upper electromagnetic coil and lower electromagnetic coil combined structure is adopted, due to a method for selectively starting the stirring device, the stirring effect of molten steel in the crystallizer is ensured, the inherent quality of a continuous casting blank is improved, under the condition that other conditions of production of the continuous casting machine are the same, the casting speed of continuous casting can be obviously improved, and the production efficiency is improved.

The invention discloses an optical glass softening furnace. The optical glass softening furnace comprises an automatic pouring device, a first conveying channel located below the automatic pouring device, a base and a softening furnace body arranged on the base, wherein a second conveying channel matched with the first conveying channel is glidingly arranged below the first conveying channel, stop rings are arranged at output ports of the second conveying channel, and through holes are formed in the stop rings and at the bottoms of the output ports of the second conveying channel; thermal insulation devices are arranged at an outlet and an inlet of the softening furnace body. The optical glass softening furnace can improve the working efficiency.

In a method for adjusting a fan of an electronic device, a sensor of the electronic device detects an instant work environment temperature of an electronic component of the electronic device. The detected temperature is obtained from the sensor. The speed of the fan under the detected temperature and a speed of the fan to which it may be adjusted is computed using a predefined algorithm based on prestored values, obtained from experimentation. The fan is adjusted to achieve a heat dissipation mode and an energy-saving mode of the electronic device accordingly.

The invention discloses a mining spiral integrated mobile cooling and refrigerating unit which comprises a screw compressor, a spiral tube type evaporator, an efficient shell and tube type condenser, a cooling water system, a fan, an electric control system and outer shell plate, a frame and a connecting pipeline. The cooling water system comprises a spiral tube type recooler, a water tank, a water filter, a water pump, an axle flow fan and an electric control system. The water tank is connected with the water filter through the water pump. The water filter is connected with one end of the spiral tube type recooler. The other end of the spiral tube type recooler is connected with the axle flow fan. The efficient shell and tube type condenser is connected with the spiral tube type evaporator through the efficient axle flow fan. The spiral tube type evaporator is connected with the water tank and the efficient spiral tube type evaporator through pipelines. The screw compressor, the electric control system, the spiral tube type evaporator and the outer shell plate are mounted on the frame. The mining spiral integrated mobile cooling and refrigerating unit is mainly used for cooling the surrounding air and lowering the working environment temperature around a working face, widely applicable to mine tunnels with depth ranging from 300 meters to 1200 meters, and the temperature of the air below 10m<3> / s can be lowered from 32 DEG C to below 19 DEG C.

The invention discloses an embedded type heat dissipation system of a projector and belongs to the technical field of thermoelectric conversion. The embedded type heat dissipation system comprises a projector outer cover, thermoelectric conversion materials, a support, a direct-current fan, an electric energy storage module, a control module and cables. The thermoelectric conversion materials are embedded in the inner side wall of the projector outer cover, the support is arranged on the outer side wall of the projector outer cover, the direct-current fan is arranged on the support, the thermoelectric conversion materials are connected with the electric energy storage module through the cables, and the control module is respectively connected with the electric energy storage module and the direct-current fan through the cables. The embedded type heat dissipation system is reasonable in design, simple in structure and capable of solving the problem of electric energy supplying of a projector lamp bulb heat dissipation system and the problem of projector lamp bulb protection when manual operation is not correct.

The invention provides a bearing blockseat of a slag breaking machine, which can ensure that for keeping a bearing is difficult tofrom being damaged and ensuring the normal use of the slag breaking machine can be used normally. The bearing blockseat of the slag breaking machine comprises a bearing packgroup, each bearing is supported on a bearing blockseat, and a bearing blockseat group is formed by the bearing blocksseats corresponding to all the bearings in the bearing packgroup. The bearing blockseat of eachthe slag breaking machine is characterized in that the shell of each bearing blockseat in the bearing seat group comprises an inner shell, an outer shell and a cooling hollow cavity encircled by the inner shell and the outer shell, an outlet and an inlet of the cooling hollow cavity are respectively arranged on the outer shell, the cooling hollow cavities of the adjacent bearing blocksseats are connected in series, the inlet of the cooling hollow cavity of the first bearing blockseat is connected with a medium input hole, and the outlet of the cooling hollow cavity of the final bearing blockseat is connected with an output pipe.

The invention discloses an intelligent parking system. The problem that harmful gas is prone to being accumulated in an existing underground stereo garage is solved. The intelligent parking system is characterized in that the upper end of each external air exhaust shaft communicates with an outer space of a ground garage; an external exhaust blower is arranged in each external air exhaust shaft; exhaust outlets communicating with the external air exhaust shafts are formed in the outer walls of parking spaces; and the exhaust outlets are provided with parking space exhaust blowers. According to the intelligent parking system, waste gas, waste heat and the like in the corresponding parking spaces can be exhausted into the corresponding exhaust air exhaust shafts through the parking space exhaust blowers, and then the waste gas and waste heat in the external air exhaust shafts are exhausted out of the ground garage through the external exhaust blowers; and through an air inlet in a vehicle carrying rotary platform, fresh air can be supplied to the interior of a garage lifting channel continuously, so that fresh air is supplied into the parking spaces on the two sides of the garage lifting channel, and accordingly the undesirable odor and the harmful gas of each parking space can be effectively diluted.

The invention discloses centrifugal equipment for hospital examination. The centrifugal equipment for hospital examination comprises a shell mechanism, a cover plate mechanism, a base plate, a brushless motor, a driving shaft, a rotating mechanism, rotating columns, a protective plate, protective grooves, air ducts, fan mechanisms and air holes, wherein the shell mechanism is disposed in rectangular trapezoid in appearance; the cover plate mechanism is disposed at the upper end of the shell mechanism; an inner cavity of the shell mechanism is hollow; the base plate is fixedly mounted on a bottom plate of the inner cavity of the shell mechanism; the brushless motor is fixedly mounted in the center of the upper end surface of the base plate; the driving shaft is fixedly connected with the output end of the brushless motor; the rotating mechanism is disposed on the upper part of the driving shaft; two rotating balls are disposed at the edge of an outer ring of the rotating mechanism; therotating columns are fixedly connected to the upper ends and the lower ends of the two rotating balls correspondingly; the protective plate is fixedly mounted on the upper end surface of the base plate; and the protective plate is disposed in an annular shape. The centrifugal equipment for hospital examination has the advantages that the abrasion to a test tube storage box is low, and the workingenvironment temperature is low.

The invention relates to a highly-efficient light emitting diode (LED) power supply. The power supply comprises a bridge rectifier module and a switching power supply direct current-direct current (DC-DC) conversion module, wherein the output end of the bridge rectifier module is connected to an LED light source through the switching power supply DC-DC conversion module; and the switching power supply DC-DC conversion module comprises a secure sockets layer (SSL) 21083 chip. The highly-efficient LED power supply has the advantages that the work efficiency of the power supply is greatly improved, the size of the power supply is reduced, and the product cost is reduced by eliminating a transformer and an independent constant current control circuit; and the operating temperature of an LED is controlled, the over temperature protection of the LED light source is realized, and the service life of the power supply and a lamp is prolonged by an LED temperature compensation circuit of the power supply.

The invention relates to a preparing method for an aluminum base graphene and carbon nano tube composite heat dissipation material, and belongs to the technical field of heat dissipation material preparing. The method comprises the steps that equivalent graphene, carbon nano tube powder and aluminum salt are added in an absolute ethyl alcohol solution, and evenly-scattered graphene and carbon nano tube mixed electrophoresis liquid is obtained through ultrasonic scattering; and after being subjected to surface treatment through dilute nitric acid, deionized water, absolute ethyl alcohol and ultrasonic waves, aluminum base sheets serve as a cathode; graphite sheets serve as an anode, and the cathode and the anode are immersed in the mixed electrophoresis liquid to be subjected to electrophoretic deposition; then, the aluminum base sheets are stacked into multiple layers from one end, cold press forming is conducted, the other ends of the aluminum base sheets wrap the outer face of a pressed and formed sample by one circle, and the other ends of the aluminum base sheets are welded and fixed to the side face of the sample; and annealing treatment is conducted at the nitrogen atmosphere, and accordingly the aluminum base graphene and carbon nano tube composite heat dissipation material is obtained. According to the method, the technology is simple, energy saving and environment friendliness are achieved, cost is low, and the prepared composite heat dissipation material is high in heat dissipation efficiency and high in mechanical strength.