41results about How to "High cooling power" patented technology

The invention discloses a loop-type heat pipe radiator and a method for making the same. The radiator comprises a plate-type evaporation chamber, a porous capillary structure and outside pipelines. The porous capillary structure is filled into the plate-type evaporation chamber; the outside pipelines are connected with both ports of the plate-type evaporation chamber; the outside pipelines and the plate-type evaporation chamber form a closed loop; working fluid is filled in the plate-type evaporation chamber; and one end of the plate-type evaporation chamber is connected with a fluid charging pipe. The making method comprises the following steps of forming the plate-type evaporation chamber, configuring the capillary structure, pressing edges and welding, pouring fluid to make vacuum, sealing and electric welding. The radiator can effectively save space because of the thinner wall of the plate-type evaporation chamber, can save contact thermal resistance between heating elements and the plate-type evaporation chamber because the heating surface is a plane, can solve the problem that the density of heat flow of the heating elements increases gradually because of the high heat radiating power, can increase the heat transferring distance because of the longer outside pipelines, and meanwhile can achieve mass production because of simple structure and production process.

The invention relates to a heat radiating plate and a manufacture method thereof. The heat radiating plate comprises a base (1) and a top cover (2), wherein the base (1) is buckled with the top cover (2); a sealing cavity is formed between the base (1) and the top cover (2); and an injection and exhaust pipe (4) is inserted on the side wall of the top cover (2). The heat radiating plate is characterized in that the sealing cavity is internally provided with a supporting member (3) supported between the base (1) and the top cover (2); and the upper surface of the base (1) and the lower surface of the top cover (2) are respectively provided with a sintering copper powder layer (5). In the invention, because the sealing cavity formed between the base and the top cover is internally provided with the supporting member, the problem that copper materials become soft after high-temperature sintering and silver soldering and the problem that a plate is inwards sunk and deformed due to negative pressure formed by vacuum pumping are solved. The heat radiating plate cannot have the phenomenon that backflow cannot be smoothly carried out due to blocking, thereby greatly improving the heat conductivity, guaranteeing that elements are smooth and have extremely small deformation and ensuring normal works.

The invention provides a water cooling plate for heat dissipation of a high-power electrical heating element. The water cooling plate comprises an upper plate (6) with upper fins (8) and a lower plate (7) with lower fins (4); and the upper plate (6) with the upper fins (8) and the lower plate (7) with the lower fins (4) and a main flow channel are welded to form an integrated one, thereby forming a cooling medium flow channel. In addition, the upper plate and the lower plate respectively include upper plate slots (13) and lower plate slots (12), wherein the upper plate slots (13) and the lower plate slots (12) are formed by milling. And the upper fins (8) and the lower fins (4) are arranged in a staggered mode at certain angles in the flow channel. With the water cooling plate, the cooling liquid disturbance in the flow channel is enhanced. The heat dissipation efficiency is high; and the processing technology is relatively simply. And the water blocking can be controlled in a reasonable range.

The invention relates to a method for dissipating heat of a thermotube of a convertor and a radiator thereof. The thermotube is adopted to dissipate heat and inserted into a baseplate of the radiator; the baseplate of the radiator clings to a heating baseplate of the convertor; the thermotube is vertically and obliquely inserted into a main plane of the baseplate of the radiator and runs through the baseplate; the underside of the root of the thermotube is directly contacted with the surface of the heating baseplate of the convertor; the cross section of the thermotube is variable and the thermotube has a ladder-shaped structure of which the upper part is small and the lower part is large; the section of the root is larger than that of the upper part; and the heat of the heating baseplate of the convertor is directly conducted out through the underside of the root of the thermotube directly contacted with the surface of the heating baseplate of the convertor. The radiator comprises a radiator baseplate, the thermotube, a radiating fin and the heating baseplate of the convertor; the root of the thermotube is vertically and obliquely inserted into the main plane of the baseplate of the radiator and passes through the baseplate; the underside of the root of the thermotube is directly contacted with the surface of the heating baseplate of the convertor; and the thermotube has the ladder-shaped structure of which the upper part is small and the lower part is large. Compared with that of the conventional radiator, the entire thermal resistance of the radiator can be reduced by 20 to 30 percent; and the heat dissipation power is increased by 100 percent.

This invention relates to a heat dissipation device of the computer and especially to an efficient liquid cooling dissipation device, which is characterized by comprising heat conductor with multiple loop, two chamber dissipation devices, recycling pump, electrical fan, liquid transmission soft tube and connection tube. The recycling pump is fixed on the left and right or upper and down sides of the dissipation device. The in and out ends of the pump are fixed with the left and right chambers on the bottom of the two chambers through connection pipe, wherein, the two chambers have electrical fan in middle.

The invention discloses a welding-free full-insertion-type LED (light-emitted diode) light source, consisting of a lamp bead, a fixed ring lamp shade, a radiator and a lamp foot, wherein the light bead comprises a lamp bead lens, an LED chip, a fixed lamp holder, a positive pin, a negative pin and an LED support; the fixed lamp holder, the positive pin and the negative pin are arranged in the fixed ring lamp shade; and the lamp bead lens protrudes out of the lamp bead lens. A traditional welding mode is replaced by the connecting mode of threads or fasteners of the radiator and the fixed ringlamp shade, so that the contact of the radiator and the fixed ring lamp shade is realized by the lamp foot and the LED pin in a full insertion type, and the traditional welding mode of the radiator and the fixed ring lamp shade is omitted. For the LED light source, the volume is small, and the largest outer diameter of a largest part, namely the radiator, is only 15mm. The rated current of the lamp bead is 300mA, the rated voltage of the lamp bead ranges from 3.2V to 3.6V, the lightness of the lamp bead is higher than 100 lumen (LM), and the luminance of the light source is enough. In addition, the invention relates to the installation method of the LED light source and a connection lamp holder matched with the LED light source for installing.

The invention discloses a LED lamp comprising a housing, a LED illuminant, a surface cover, a LED power supply and a power supply connecting line. The surface cover is provided with a lens; the LED illuminant is formed by a heat conducting substrate and LED chips; the housing is made of metal material by integral formation; the housing is hollow to form a heat dissipation chamber; the LED power supply is fixed inside the heat dissipation chamber of the housing and used for powering the LED chips; multiple heat dissipation holes are distributed in the surface of the housing, heat dissipation fins are installed at the right front or right rear of the openings of the heat dissipation holes, the openings of the heat dissipation holes are covered by the board bodies of the heat dissipation fins, two ends of the heat dissipation fins bend and are connected with the surface of the heat dissipation housing, two heat dissipation side holes are formed by the heat dissipation fins and the heat dissipation housing, and hot air can flows and dissipates through the heat dissipation side holes; the upper opening of the housing is provided with flanges which is fitted with the heat conducting substrate for heat conduction; the LED illuminant is connected with the housing. By means of the structure, the LED lamp has good heat dissipation effect and long service life.

The invention discloses a system and a method for improving heat dissipation potential of a heat sink. The system comprises a heat sink assembly and a cooling fan, wherein the cooling fan is used for sucking cold air used for heat dissipation into the heat sink assembly, the heat sink assembly is divided into a heat sink core body and a wind scooper, the heat sink core body is provided with a plurality of annular heat dissipation regions, a runner pipeline is distributed on the heat sink core body, and the interior and the exterior of the runner pipeline in the annular heat dissipation regions are respectively provided with an inner fin and an outer fin. The system and method for improving heat dissipation potential of the heat sink disclosed by the invention fully utilize the wind speed distribution characteristic produced by a cooling fan, the heat sink is divided into N annular heat dissipation regions, heat dissipation design is independently carried out on each annular heat dissipation region, the most suitable inner fin and the most suitable outer fin are selected, and heat dissipation power in each heat dissipation region is guaranteed to be maximum at a designed wind speed.

The invention discloses a cabinet-based direct evaporative cooled machine room air-conditioning system. The system comprises a refrigerant circuit, an oil return circuit and a cooling water circuit. According to the cabinet-based direct evaporative cooling machine room air-conditioning system, refrigerants are directly delivered to a server and are directly evaporated to cool the server through evaporators arranged on the server. Compared with a machine room air-conditioning system cooled by supplying air conventionally, the system has the advantages of high heat dissipation power, high efficiency, small size and the like. Compared with a conventional refrigerant evaporative cooled air-conditioning system, the machine room air-conditioning system directly delivers all liquid to the evaporators through a low-pressure circulating barrel and a first variable frequency magnetic force pump, so that the system has the advantages that the pressure drops of refrigerants in the evaporators are small; the back temperature of a compressor is low, and a heat exchange system is large; through the arrangement of the oil return circuit, the problem of oil return of the system is solved creatively, and the system has the characteristics of high comprehensive energy efficiency and the like.

The invention belongs to the technical field of guide rail tramcars, relates to a power unit, in particular to a multifunctional high-density power unit applied to a vehicle-mounted energy storage type guide rail tramcar. The power unit comprises a heat dissipation device, and an IGBT (Insulated Gate Bipolar Translator) module with the functions of three-phase inversion, single-phase chopping andenergy control is arranged above the heat dissipation device. A first frame component and a second frame component are arranged at side edges of the heat dissipation device; a composite busbar and a configuration board are arranged above the IGBT module. An absorption capacitor is installed on the composite busbar. A driving plate assembly is arranged above the composite busbar, and the two end parts of the driving plate assembly are fixedly mounted with the first frame assembly and the second frame assembly respectively; a power connector is installed on the driving plate assembly, and a protection plate is arranged above the driving plate assembly. Through the design of an IGBT structure packaged by a bridge arm, the whole main circuit has the functions of three-phase inversion, single-phase chopping and energy control, and the whole power unit has the characteristics of high density and high space utilization rate.

The invention relates to the technical field of cooling of a high-power component, in particular to a liquid cooling heat sink employing a liquid heat conduction medium to dissipate heat. The liquid cooling heat sink is characterized in that a heat sink (1) is formed by welding a metal plate a (4) and a metal plate b (7), wherein the metal plate a (4) is provided with a liquid inlet (2) and a liquid outlet (3), parallel passages (5) are arranged on the inner side of the metal plate a (4) and are communicated with one another to form a groove space (6), and parallel grooves (8) are formed in the inner side of the metal plate b (7) and are not communicated with one another. In the liquid cooling heat sink disclosed by the invention, the surface, in contact with a hot source, of the heat sink and a cooling surface are both horizontal smooth plane so as to fully expand a heat exchange area, and the internal passage of a liquid cooling cavity is designed to a snake shape to reduce the flow resistance of a liquid in a water cooling cavity. The material of the liquid cooling heat sink shall be selected from metal with favorable heat conduction performance, such as copper and aluminum. In the liquid cooling heat sink, on one side, opposite to the liquid inlet (2) and the liquid outlet (3), of the cooling surface, a heating component is pasted on the cooling surface by heat conduction silica gel.

The invention relates to the field of permanent magnet synchronous motors, and discloses a disc type permanent magnet motor applied to a crane, which comprises a casing suite, a motor shaft, rotor assemblies and stator assemblies. The number of the rotor assemblies and the number of the stator assemblies are equal and are greater than or equal to 2. A hollow cavity is defined by the casing suite,and the motor shaft horizontally penetrates through the casing suite and is connected with the casing suite in a rotating mode. The stator assemblies are located in the cavity of the casing suite andare fixedly connected with the casing suite. A radial gap is formed between each stator assembly and the circumference of the motor shaft. The rotor assemblies are fixedly arranged on the motor shaft,and rotors in the rotor assemblies and stators in the stator assemblies are in one-to-one matching correspondence and are used for generating electromagnetic torque for driving the motor shaft. A horizontal double-output shaft extension structure is adopted, and the two shaft extension ends of the motor can be respectively provided with a planetary gear reduction box and a brake, so that the sizeof the motor is reduced.

The invention discloses a heating and cooling system applied to an automatic gearbox and an operation method thereof. The system comprises a temperature-controlled reversing valve, a gearbox cooler, aheat exchanger and a pipeline of the heat exchanger, wherein the temperature-controlled reversing valve is provided with an inlet and two outlets, and the heat exchanger is provided with two sets ofinlets and outlets correspondingly communicating with each other; and the inlet of the temperature-controlled reversing valve is connected with the gearbox, the outlet I of the temperature-controlledreversing valve is connected with the inlet of the gearbox cooler, the outlet II of the temperature-controlled reversing valve is connected with the inlet II of the heat exchanger, the outlet II of the heat exchanger is connected with the gearbox, the inlet II of the heat exchanger is also connected with the outlet of the gearbox cooler, and the inlet I and the outlet II of the heat exchanger areboth connected with an engine. The problems that when the oil temperature of the gearbox is low, the lubricating effect is poor, and when the oil temperature rises to a certain extent, the lubricatingoil film is damaged, the lubricating effect is lost, and the service life of the gearbox is influenced are solved.

The invention discloses a preparation method of a radiation refrigeration functional fabric. The preparation method comprises the following steps that (1), two or more polymers with solubility difference are mixed and dissolved, heated and stirred until the solution has viscosity to obtain slurry; and (2), the slurry is prepared into yarns by using wet spinning, coagulating bath is carried out on the obtained yarns, then drying is carried out to prepare the fabric, and the radiation refrigeration functional fabric is obtained. The yarn forms a porous structure through the difference of the precipitation rates of two or more polymers in water, and the porous micro-nano structure can improve the reflectivity of sunlight and reduce heat intake, so that the radiation refrigeration effect is improved. Wet spinning is carried out on two or more polymers, the strength of the yarn is guaranteed, certain elasticity is guaranteed, and the defect that a single polymer is single in function is overcome; and the heat dissipation power of the fabric can be increased according to the characteristics of high absorption and high emission of the polymer material in the mid-infrared region, and the cooling effect is effectively achieved.

A preventive cabin temperature controlling method based on real-time power of a fan unit belongs to the technical field of wind power. The invention relates to a wind generating set temperature control system, in particular to a nonlinear wind power generator temperature control system. According to the real-time power of a fan, processing is carried out through an algorithm, so that a heat dissipation curve is moved outwards, the heat dissipation power is increased, the residual amount is reserved after the temperature is adjusted, the hysteresis is eliminated, and the nonlinear and preventive control on the temperature of a cabin is realized. According to the preventive cabin temperature controlling method, the output power of the temperature control system is calculated and determined according to the real-time power and the rotating speed torque table of a wind turbine generator so as to control the temperature control system. The temperature adjusting capability is better while the output power of the temperature control system is larger as the real-time power of the wind turbine generator increases. As the slope of the power curve of the wind turbine generator becomes larger,namely, the power corresponding to the next rotating speed becomes larger, the output power of the temperature control system becomes larger, and the temperature adjusting capability is better.

The invention relates to a method for dissipating heat of a thermotube of a convertor and a radiator thereof. The thermotube is adopted to dissipate heat and inserted into a baseplate of the radiator; the baseplate of the radiator clings to a heating baseplate of the convertor; the thermotube is vertically and obliquely inserted into a main plane of the baseplate of the radiator and runs through the baseplate; the underside of the root of the thermotube is directly contacted with the surface of the heating baseplate of the convertor; the cross section of the thermotube is variable and the thermotube has a ladder-shaped structure of which the upper part is small and the lower part is large; the section of the root is larger than that of the upper part; and the heat of the heating baseplateof the convertor is directly conducted out through the underside of the root of the thermotube directly contacted with the surface of the heating baseplate of the convertor. The radiator comprises a radiator baseplate, the thermotube, a radiating fin and the heating baseplate of the convertor; the root of the thermotube is vertically and obliquely inserted into the main plane of the baseplate of the radiator and passes through the baseplate; the underside of the root of the thermotube is directly contacted with the surface of the heating baseplate of the convertor; and the thermotube has the ladder-shaped structure of which the upper part is small and the lower part is large. Compared with that of the conventional radiator, the entire thermal resistance of the radiator can be reduced by 20 to 30 percent; and the heat dissipation power is increased by 100 percent.

The invention relates to the field of communication management machines, and particularly relates to a communication management machine safety protection device for an integrated automation system anda using method thereof. The communication management machine safety protection device comprises a machine shell, an exhaust mechanism used for cooling the interior of the machine shell is arranged onthe inner wall of the machine shell, and an air sweeping mechanism is arranged on the exhaust mechanism and can be adjusted in length and angle. The exhaust mechanism is in transmission connection with the air sweeping mechanism, a temperature sensing regulation and control mechanism is further arranged in the machine shell, the temperature sensing regulation and control mechanism is in transmission connection with the air sweeping mechanism, the temperature sensing regulation and control mechanism can drive the air sweeping mechanism to adjust the length and the angle according to the temperature change in the machine shell, and the heat dissipation power of the exhaust mechanism is adjusted. According to the communication management machine safety protection device for the integrated automation system and the using method thereof, the heat dissipation power of the exhaust mechanism is adjusted according to the temperature in the machine shell, integrated elements in the machine shell can be rapidly cooled, energy consumption can be reduced, and the air sweeping area of the air sweeping mechanism can be adaptively adjusted.

The invention discloses a heat dissipation device using an external air source. Include a heat dissipation substrate, sealing gasket, heat dissipation fin plat, Six mounting screws, outlet fitting, Plug, muffler, Intake connection, the heat dissipation device uses compressed air supplied from an external air source as an enhanced heat transfer medium, Introduce compressed air from the intake fitting, through the air passage between the heat dissipation substrate and the heat dissipation fin plate, the air passage is discharged from the air outlet connector or the muffler, As that compress airflows in the air passage between the heat dissipation substrate and the heat dissipation fin, heat exchange occurs with the radiator, and carrying heat out of the radiator, so as to achieve the purpose of improving the heat dissipation effect, By installing the air outlet connector, the plug and the muffler on the air outlet of the heat dissipation substrate in different combinations, the heat dissipation device can realize the switching of the natural heat dissipation mode, the normal mode and the air bypass mode, and the invention is particularly suitable for the heat dissipation of the electronic drive control system of the equipment which needs an external air source to operate.

The invention relates to the technical field of loads, in particular to a high-power-density rack-mounted load which comprises a box body and a resistor unit arranged in the box body, the resistor unit comprises a plurality of parallel resistor rows, and each resistor row comprises a plurality of insulating supporting plates, locking assemblies and a plurality of spiral resistor strips which are fixedly arranged at intervals. A plurality of supporting holes are formed in each insulating supporting plate in the length direction of the insulating supporting plate, a plurality of resistor strips penetrate through the supporting holes respectively, and the center line of each resistor strip is kept to be a straight line depending on the strength of the resistor strip; connecting plates are arranged among the plurality of resistor rows, so that the plurality of resistor rows are fixedly arranged at intervals; and the resistor strips of each resistor row are electrically connected with one another, and the resistor strips of the resistor rows are electrically connected with one another. The direct contact area of the spiral resistor strip and the air is large, the heat dissipation speed is high, and the heat dissipation power is large in unit volume. The overall load is small in size and large in power, and the power can be increased by two to three times under the same size compared with a conventional rack type load.

The invention discloses a passive wireless temperature measuring sensor and a temperature measuring method. The temperature measuring sensor is composed of a power supply module, a control module, a temperature measurement module and an infrared data transceiver module. The hot end of the thermoelectric power generation chip is attached to the surface of the high-voltage and high-current power wire, and it is fixed on the power wire with a pressure equalizing ring bracket, and the temperature difference generated by the current passing through the power wire is used to generate electricity and collect energy; through the energy collection chip, the semiconductor The direct current output by the thermoelectric generator is boosted and rectified, and stored in a capacitor to supply power to subsequent circuits; high-precision temperature measurement is realized based on platinum resistors, and temperature data is transmitted by infrared light encoding. The invention can be used to monitor the temperature rise of high-voltage power transmission and distribution system equipment, does not need power supply, has high precision, good stability, strong anti-electromagnetic interference ability, and is convenient for installation and application on high-voltage and movable parts.

An embodiment of the invention discloses a flow control valve, a flow control device and a hydraulic oil heat dissipation system and relates to the technical field of engineering machinery. The flow control valve comprises a three-way pressure compensated valve, a first throttling valve and a second throttling valve; an oil inlet of the first throttling valve is in parallel connection with an oil inlet of the three-way pressure compensated valve; an oil outlet of the first throttling valve is in parallel connection with an oil inlet of the second throttling valve; an oil outlet of the second throttling valve is communicated with a flow feedback oil opening of the three-way pressure compensated valve. The flow control device and the hydraulic oil heat dissipation system comprise the flow control valve. The hydraulic oil heat dissipation system can improve heat dissipation efficiency of a hydraulic oil radiator.

The invention discloses an exhaust gas recirculation system. The exhaust gas recirculation system comprises a cooler, wherein an exhaust gas inlet used for being connected with an exhaust manifold and a supercharger after-treatment device, a first exhaust gas outlet used for being connected with an intake manifold and a second exhaust gas outlet used for being connected with a supercharger are formed in a cooling channel of the cooler; and the second exhaust gas outlet is positioned at the downstream part of the flow direction of the first exhaust gas outlet, and a variable-runner switch valve is arranged between the second exhaust gas outlet and the first exhaust gas outlet. According to the exhaust gas recirculation system disclosed by the invention, parts are fewer, occupied space is small, assembly is simple, space in an engine is reduced, one cooler is arranged on the engine more easily, and the cost is low; besides, the second exhaust gas outlet used for being connected with the supercharger has a longer flow distance compared with the first exhaust gas outlet, so that higher heat dissipating power can be realized, and heat dissipating power is improved by prolonging the time of flowing, in the cooler, of the exhaust gas. The invention further discloses an engine comprising the exhaust gas recirculation system.

The invention discloses a hydraulic retarding bridge wireless communication control system and method for an articulated vehicle, which belong to the technical field of automobile auxiliary braking. The system comprises a tractor cab electronic control system, a trailer hydraulic retarder bridge electronic control system, a water path and gas path system and a control method, the tractor cab electronic control system and the trailer hydraulic retarder bridge electronic control system communicate through a wireless communication technology, the purpose that a cab remotely controls a trailer hydraulic retarder bridge is achieved, and the risk of control failure caused by breakage of a traditional signal line at a hinged position is avoided. The control system is simple in structure and highin reliability, remote control communication can be achieved, and traditional long-distance line arrangement is reduced. According to the control method, dangerous working conditions such as folding and drifting in the braking process can be avoided, the braking stability of the articulated vehicle is improved, the intelligent degree is high, and the functions of real-time speed protection and temperature protection are achieved.

The invention relates to an electric loader, in particular to a frequency converter IGBT module liquid cooling heat dissipation device of the electric loader. The device comprises a water cooling headand a water pump; the water cooling head is of a closed box structure, an IGBT module is tightly attached to the upper surface of a top panel of the water cooling head, and a plurality of vertical cooling fins are densely distributed on the lower surface of the top panel of the water cooling head; the water pump is arranged at the bottom in the water cooling head, a water pump inlet is communicated with the radiator water outlet chamber through a liquid inlet pipe, the water cooling head is communicated with the radiator water inlet chamber through a liquid outlet pipe, and a plurality of radiating water channels are arranged between the radiator water outlet chamber and the radiator water inlet chamber. A fan is installed on one side of the radiator and electrically connected with the water pump and the fan. According to the IGBT module disclosed by the invention, heat is rapidly dissipated through the heat dissipation fins, and the heat dissipation fins are cooled by water, so the heat dissipation efficiency of the IGBT module is improved; the fan increases the radiating power of the radiator, so the functions of the radiator are centralized; and the water cooling head adopts intra-cavity direct injection pressurization, so the heat exchange efficiency is higher, and the service life of the pump body is longer.

The invention relates to a high-power loop heat pipe radiator and a manufacturing method thereof. The radiator comprises a plate evaporator, a condenser, at least a steam line and at least a liquid line, wherein the steam line and the liquid line are used for connecting the plate evaporator with the condenser; the liquid line is also communicated with a vacuumizing and working medium filling line; a porous material is fixed inside the plate evaporator; and a plurality of communicated steam discharge channels are formed in the porous material. The manufacturing method comprises the following steps: preparing the porous material; stamping a top cover and a bottom plate of the plate evaporator; putting the porous material between the top cover and the bottom plate and fixedly connecting the top cover with the bottom plate; carrying out welding and communicating; and carrying out cleaning, vacuumizing, working medium filling and sealing. The radiator and the manufacturing method have the following advantages that: the radiation and installation use requirements of the high-power power electronic devices can be well met, the aim of full and effective contact with the power electronic devices can be achieved and the special evaporator structure further saves the space and is further beneficial to reinforcement of heat exchange, thus farthest reducing the radiating heat resistance.

The invention discloses a computer room air-conditioning system based on direct evaporative cooling of cabinets, which comprises a refrigerant circuit, an oil return circuit and a cooling water circuit. In the present invention, the refrigerant is directly transported to the server, and the evaporator installed on the server is used to directly evaporate the refrigerant to cool the server. Compared with the conventional computer room air conditioning system cooled by air supply, it has large heat dissipation power, high efficiency, and small volume. advantage. Compared with the conventional refrigerant evaporative cooling air-conditioning system, the computer room air-conditioning system of the present invention realizes direct delivery of all liquids to the evaporator by setting a low-pressure circulation bucket and the first frequency conversion magnetic pump, thereby having a small pressure drop of the refrigerant in the evaporator, and the compressor The return air temperature is low, the heat exchange system is large, etc., and the oil return problem of the system is creatively solved by setting the oil return circuit, so that the system has the characteristics of high comprehensive energy efficiency.