176 results about "Cooling cycle" patented technology

The invention relates to the technical field of motors, and discloses an oil injection direct-cooling heat dissipation structure which is installed inside a motor, an inner cavity of the motor is provided with a stator iron core used for fixing a metal coil, an oil inlet is formed in a machine base, an oil channel is formed in the annular wall of the stator iron core, and the oil injection direct-cooling heat dissipation structure further comprises two oil injection rings symmetrically arranged on the two sides of the stator iron core; the cooled oil passing through the interior of the iron core reaches the top ends of the two sides of the oil channel, enters the oil guide pipes from the top ends and finally reaches the oil injection rings symmetrically arranged on the two sides of the stator iron core. And the oil injection ring sprays and cools the end parts of the rotor and the stator iron core coil. Therefore, the cooling oil completes the cooling task of all the key heating areas. And the cooling oil after heat exchange is collected to the bottom of the motor under the action of gravity. Collected oil liquid is subjected to heat dissipation through an external cooling system, and is pumped into the oil inlet through the oil pump after being cooled, so that a complete cooling cycle is formed.

The application provides a ship cooling device and a ship cooling system, which comprise: an air conditioner refrigeration cycle device, a urea cooling device, a first urea cooling cycle pipeline and a urea cabin; the first urea cooling cycle pipeline is drawn from a main cooling cycle pipeline of the air conditioner refrigeration cycle device and connected to the urea cooling device; the urea cabin is connected to the urea cooling device; the urea cabin is used for storing urea solution; the air conditioner refrigeration cycle device is used for forming a refrigerant cycle to provide refrigerating capacity for the ship and the urea cooling device; and the urea cooling device is used for forming a urea refrigerant cycle through the first urea cooling cycle pipeline and the air conditioner refrigeration cycle device to cool the urea solution in the urea cabin. In this way, the urea cooling device and the air conditioner refrigeration cycle device are combined together to form the ship cooling device, so that the cooling of the ship and the urea cabin under extreme temperature and environment can be realized, and cost can be saved.

The invention relates to the technical field of aviation equipment, in particular to an electric gas compressor system and a cooling method thereof.The electric gas compressor system comprises a heat insulation cover and further comprises a gas compressor, a motor, a turbine, a first heat exchanger and a second heat exchanger which are fixed in the heat insulation cover; the outlet is communicated with a hot side runner inlet of the second heat exchanger; a hot side runner outlet of the second heat exchanger is communicated with an inner cavity of a shell of the motor through a cooling air channel, and the cavity is communicated with an airflow inlet of the turbine; the air compressor, the motor, the turbine and the two-stage heat exchanger are integrated in the heat insulation cover, open type cooling circulation without an external cold source is constructed, self-cooling of the motor and a bearing is achieved, a relatively low-temperature environment is built in the heat insulation cover, and the problem that an existing electric air compressor generally lacks effective self-cooling capacity, and the service life of the air compressor is prolonged is solved. And active heat management cannot be carried out on heat-sensitive parts such as motor windings and bearings by utilizing own airflow.

This invention relates to the field of hydraulic system cooling technology and discloses a hydraulic system with multiple cooling structures, including a base plate frame. Two feet are fixedly connected to the upper surface of the base plate frame, and a cooling water tank is fixedly connected to the top of each foot. A third cooling mechanism for cooling hydraulic oil is provided inside the cooling water tank. A lower fixed plate is fixedly connected to the outer circumference of the cooling water tank, and a rotating cylinder is rotatably connected to the upper surface of the lower fixed plate. A second cooling mechanism for cooling hydraulic oil is provided inside the rotating cylinder. This invention not only enables multiple cooling cycles for the hydraulic oil, ensuring complete cooling and preventing overheating and deterioration, but also allows for more comprehensive contact between the hydraulic oil and the cooling water pipes, further improving the cooling effect of the third cooling mechanism. Furthermore, it allows for more comprehensive contact between the cooling water and the oil inlet pipe, thereby further improving the cooling effect of the second cooling mechanism.

To provide a refrigeration cycle system that can suppress malfunctions of the four-way valve at low ambient temperatures. [Solution] The refrigeration cycle device comprises a four-way valve and a control unit. The four-way valve has a compressor, an indoor heat exchanger, an expansion valve, and an outdoor heat exchanger, and switches the direction of flow of the refrigerant that is circulated by the compressor in a refrigerant circuit and connected to the refrigerant circuit. The control unit controls the compressor and switches between heating operation, in which the refrigerant is circulated in a heating cycle, cooling operation, in which the refrigerant is circulated in a cooling cycle with the opposite flow direction to the heating cycle, and defrosting operation, in which frost has formed on the outdoor heat exchanger due to heating operation is removed in the cooling cycle, by switching the four-way valve. When the control unit receives an operation stop signal and is performing defrosting operation, it stops the compressor after performing heating operation for a predetermined time or longer after the completion of defrosting operation.

The invention relates to the technical field of high-temperature gas cooled reactor cooling, in particular to a cooling circulation device, a high-temperature gas cooled reactor comprehensive cooling system and a using method. A cooling circulation device comprises a liquid inlet circulation pipeline; a liquid outlet circulation pipeline; the circulating pump set is arranged between the liquid inlet circulating pipeline and the liquid outlet circulating pipeline, one end of the liquid inlet circulating pipeline is suitable for being communicated with the first liquid inlet main pipeline, one end of the liquid outlet circulating pipeline is suitable for being communicated with the first liquid inlet main pipeline, and cooling liquid flows in the first liquid inlet main pipeline; a first valve is arranged on the first liquid inlet main pipeline between the liquid inlet circulating pipeline and the liquid outlet circulating pipeline, and the communicating position of the liquid inlet circulating pipeline and the first liquid inlet main pipeline is located on the upstream of the communicating position of the liquid outlet circulating pipeline and the first liquid inlet main pipeline. The invention provides a cooling circulation device, a high-temperature gas cooled reactor comprehensive cooling system and a use method, and aims to solve the problems that power pumps and pipelines need to be additionally arranged when each system of a reactor is in an active state, the arrangement is complicated, and the cost is increased.

The application provides a heat management method and an absorption type combined cooling and heating system, and comprises the following steps: detecting the ambient temperature in a factory building; if the ambient temperature is less than a first temperature threshold, controlling a first three-way valve, a second three-way valve, a third three-way valve, a fourth three-way valve and a four-way valve to switch to a heating switch state respectively, so that the waste heat generated by auxiliary equipment and steam waste heat are used as a heating source for driving a heating cycle, and the heating cycle is completed through a circulating working medium; if the ambient temperature is greater than a second temperature threshold, controlling the first three-way valve, the second three-way valve, the third three-way valve, the fourth three-way valve and the four-way valve to switch to a cooling switch state respectively, so that the steam waste gas and heat absorbed from cooling water in a cooling cycle are used as a heating source for driving the cooling cycle, and the cooling cycle is completed through the circulating working medium. The steam waste gas, a hot water production and distribution system and a cooling water system are integrated as a whole, and the energy utilization rate is improved by switching the operation mode of the whole system.

The application discloses an energy management system of a power cycle system, wherein the power cycle system is a combined power cycle system of a gas turbine and a fuel cell, and the energy management system comprises a fuel pump, a fuel distributor, a cold end heat exchanger, a cooling cycle loop and a hot end heat exchanger; and a control system is used for controlling the fuel pump, the fuel distributor and a circulating pump in the cooling cycle loop, wherein a fuel flow is obtained based on a required power of the power cycle system, a rotating speed of the fuel pump and an opening degree of the fuel distributor, a hot end heat exchanger heat is calculated through heat balance based on the fuel flow, and a cooling effect of the cooling cycle loop is realized based on the hot end heat exchanger heat and the rotating speed of the circulating pump. The application can simultaneously meet the energy saving and emission reduction and weight control requirements of an aircraft, and also solves the problem that the system power density is limited by the heat dissipation capacity.

This utility model discloses a self-circulating cooling water system structure, including a suction pipe, a connecting pipe at the top of the suction pipe, and a suction valve at the other end of the connecting pipe connected to the suction end of a high-pressure pump. The inner cavity of the connecting pipe is provided with a suction valve that controls the flow rate of the liquid entering and its on / off state. A connecting hole is provided at the bottom of the suction pipe and at a position corresponding to the connecting pipe. A return water connector is connected to the inner cavity of the connecting hole through a detachable component. A return water pipe is connected to the top of the return water connector. The other end of the return water pipe extends upward to below the suction end of the suction valve. Due to the arrangement of the return water pipe, when the suction valve draws water, a negative pressure area is formed below the suction end of the suction valve. One end of the return water pipe is located below this negative pressure area, and the return water pipe is connected to an external circulating water pipe through the return water connector. Under the action of negative pressure, water in the external cooling water is drawn into the return water pipe, thereby making the cooling water flow and forming a cooling cycle.

Systems and methods for a regenerative ejector-based cooling cycle that utilizes an ejector as a driving force in the cooling loop to regenerate subcooling of the refrigerant in a single-stage cooling cycle.

The application relates to the technical field of vehicles, and particularly discloses an engine cooling system, a control method, a vehicle and a storage medium, the engine cooling system comprising a first cooling cycle and a second cooling cycle, the first cooling cycle comprising a first water pump, a first pipeline and a second pipeline which are arranged in parallel and are both connected with the output end of the first water pump, an EGR cooler valve and an EGR cooler which are connected in series in the first pipeline, an oil cooler valve and an oil cooler which are connected in series in the second pipeline, and a first thermostat which is connected with the first pipeline and the second pipeline respectively, and the first outlet of the first thermostat is communicated with the input end of the first water pump; the second cooling cycle comprises a second water pump, an engine block water jacket, a cylinder head water jacket and a second thermostat which are connected in series, and the first output port of the second thermostat is communicated with the input end of the second water pump, and the temperature of the cooling liquid in the second cooling cycle of the engine cooling system can be quickly raised at the start of the engine to adapt to the starting requirement in a cold environment.

The present application aims to establish an efficient and stable cooling cycle. A cooling system for a moving body includes a compressor, a condenser, an expansion valve, an evaporator, a flow rate adjustment device that adjusts a flow rate of a cooling fluid that is guided to the condenser depending on an external environment of the moving body, an ambient temperature acquisition sensor that detects an ambient condition for acquiring an ambient temperature to which the condenser is exposed by the cooling fluid, a pressure sensor that detects a pressure of refrigerant in the condenser, a temperature sensor that detects a temperature of the refrigerant on a downstream side of the condenser, and a control unit that executes a first process of adjusting the flow rate of the cooling fluid so that the pressure of the refrigerant in the condenser is greater than a saturation pressure of the refrigerant at the ambient temperature based on an output of the ambient temperature acquisition sensor and the pressure sensor, and a second process of adjusting an opening degree of the expansion valve so that the refrigerant on the downstream side of the condenser is in a supercooled state based on an output of the pressure sensor and an output of the temperature sensor.

The present application relates to the field of material science and engineering, and particularly relates to a temperature control method, device and system for material testing. The method comprises: controlling the heating of the electric heating wire to make the temperature of the inner box rise to a first set temperature and stop heating, monitoring and recording the temperature of the inner box, and reheating at the end of the cooling process. During the repeated heating and cooling cycle, the size of the optimal temperature of the current stage and the optimal temperature of the next stage are compared within a set time length, if the optimal temperature of the current stage is less than the optimal temperature of the next stage, the temperature rise is completed by adjusting the cooling time; if the optimal temperature of the current stage is greater than the optimal temperature of the next stage, the temperature drop is completed by adjusting the cooling time and adjusting the relative angle of the sample box and the inner box. The method provided by the present application uses the characteristics of fast and stable pulse heating, slow and gradually slowing down of the temperature control, saves energy consumption, improves the stage connection process, avoids reverse heating, and reduces energy consumption.

The invention discloses a solid solution and aging treatment method for preparing an aluminum alloy with balanced strength and toughness, which comprises the following steps: placing an extruded aluminum alloy profile at 510 + / -5 DEG C for heat preservation for 1 hour, and then carrying out high-pressure nitrogen fog quenching; after solid solution, immediately immersing into liquid nitrogen for copious cooling for 1 hour, then rapidly heating to 100 DEG C, and keeping the temperature for 30 minutes; repeating the cryogenic-medium temperature circulation for three times; aging treatment is conducted after cryogenic circulation, specifically, pre-aging is conducted, treatment is conducted for 6 hours at the temperature of 90 + / -5 DEG C, and a 1T pulsed magnetic field is synchronously applied; aging for the second time, heating to 130 + / -5 DEG C, preserving heat for 5 hours, and applying a stable electric field of 50V / cm; and aging for the third time, continuously heating to 155 + / -5 DEG C, preserving heat for 10 hours, and superposing 0.5 T alternating magnetic field to obtain a finished product. Through the technical path of collaborative regulation and control of cryogenic and electromagnetic fields, the method has the outstanding advantages of accurate and controllable technological parameters, low equipment modification cost and high production line adaptability.

This application relates to the field of dry-type transformer technology, specifically disclosing an all-weather dry-type transformer, including: a tank, coils, a heat dissipation channel, and an insulating spacer; the coils are disposed inside the tank; the heat dissipation channel is disposed outside the tank; one end of the heat dissipation channel connects to the top surface of the tank, and the other end connects to the bottom of the tank; the insulating spacer is disposed inside the tank; one side of the insulating spacer connects to the inner wall of the tank, and the other side connects to the outer side of the coil, preventing airflow from passing between the coil and the tank. In this design, the heat generated by the operation of the dry-type transformer can be discharged into the heat dissipation channel through the top surface, and then the high-temperature gas is cooled by heat exchange with the outside through the heat dissipation channel; the cooled gas flows back into the tank, thus forming a natural cooling cycle. At the same time, the insulating spacer allows the circulated airflow to directly pass through the inner wall of the coil, thereby improving the heat dissipation effect.

A pneumatically driven cryogenic refrigerator, primarily operating on a Gifford-McMahon (GM) cycle, switches from cooling to heating via a switching valve between a rotary valve and a drive piston that causes the displacer to reciprocate. The rotary valve has ports at two radii: one circulates flow to the displacer, and the second circulates flow to the drive piston. Both ports circulate flow to the top of the drive piston; the "cooling" port optimizes the cooling cycle, while the "heating" port provides a good heating cycle. The switching valve that changes flow from one port to the other can be linearly or rotary actuated. The rotary valve does not reverse direction.

The utility model discloses a hydro-pneumatic spring with a heat dissipation function, and belongs to the technical field of hydro-pneumatic springs. The device comprises a hydro-pneumatic spring body, a floating piston, a one-way check valve, a cooler and a pipeline system. The floating piston achieves oil-gas isolation, the main piston divides an inner cavity of the cylinder body into a center cavity and an annular cavity, and the center cavity and the annular cavity are communicated through a piston rod damping oil channel and an external pipeline. The core innovation is that in the active cooling circulation, in the compression stroke, hot oil in a central cavity is pressed out, is forcibly guided into an external cooler through a one-way check valve to be cooled, and then is injected into an annular cavity; and in the stretching stroke, the oil flows back to the central cavity through the damping hole. By means of the structure, a double heat dissipation mechanism combining cylinder barrel convection radiation heat dissipation and oil liquid replacement convection heat dissipation is formed, the limitation that a traditional hydro-pneumatic spring only relies on a cylinder body for heat dissipation is broken through, the temperature of oil liquid and gas can be actively and efficiently controlled, temperature rise is remarkably restrained, and sealing reliability and system work stability are guaranteed.

This invention discloses a liquid-cooled microchannel powder metallurgy fabrication method, belonging to the field of radiator manufacturing technology. The invention employs a pre-stamping process to prepare copper heat dissipation fins, combined with customized spherical high-purity copper powder and composite polymer bonding particles. A uniform mixture is prepared through segmented high and low temperature and high and low speed stirring. This is then combined with metal powder injection molding, oxalic acid degreasing, nitrogen atmosphere constant temperature anti-oxidation pretreatment, and high-vacuum sintering processes, along with controllable molding and sintering parameters, to fabricate a copper liquid-cooled microchannel radiator. This invention effectively solves the problems of difficult molding of thin-walled pure copper microchannel structures, poor dimensional consistency, and susceptibility to defects and springback. It significantly improves the extrusion of copper materials in microchannel structures, the smoothness of the inner wall, and the overall density, strengthens the bond strength between the fins and the substrate, and eliminates leakage, corrosion, and heat dissipation attenuation under long-term liquid cooling cycles. The product yield is high, and the stability is excellent.

The application discloses a Stirling refrigeration engine system and a heat exchange system thereof, which comprises a Stirling engine body, wherein the Stirling engine body comprises a refrigeration head, the refrigeration head comprises a plurality of refrigeration components, the refrigeration components comprise a cover body one, a cover body two and a plurality of refrigeration capillary tubes, the cover body one is connected with a hot cylinder of the Stirling engine body, the cover body two is connected with a cold cylinder of the Stirling engine body, and the two ends of the refrigeration capillary tubes are connected between the cover body one and the cover body two respectively, the Stirling refrigeration engine system further comprises a rotary driver, a rotary output shaft of the rotary driver is connected with a rotating shaft of the Stirling engine body, and the rotary driver is used for driving the Stirling engine body to work, and the refrigeration capillary tubes can be cooled and refrigerated. The Stirling engine body can be driven to generate a Stirling cooling cycle by the electric rotary driver, working gas forms a Stirling refrigeration cycle in the Stirling engine body, and high-speed refrigeration is achieved by using the working gas to form a closed cycle to do work.

Provided is a cooling cycle apparatus including a first heat exchanger configured to discharge heat, a second heat exchanger configured to absorb heat, and a magnetic cooling device disposed between the first heat exchanger and the second heat exchanger and configured to operate by sequentially switching between a first mode and a second mode. The magnetic cooling device includes a magnetocaloric material, a magnet configured to form a magnetic field, and a current generating device configured to generate a current.

The dual one-way valve bidirectional throttling post-heat exchanger air conditioner water heater of the present invention includes: a compressor, a four-way valve, indoor and outdoor heat exchangers, a hot water heat exchanger, two one-way valves, two throttling devices, and a gas-liquid separator; characterized in that: the hot water heat exchanger is placed between the second ports of the indoor and outdoor heat exchangers, and is respectively connected to the second interfaces of the first and second directional flow throttling devices composed of one-way valves and capillary throttling devices; it has three operating modes: hot water production, cooling, and heating; and the cooling circulation pipeline is connected to the cooling process. The sequence is: compressor, four-way valve, outdoor heat exchanger, first check valve, hot water heat exchanger, second throttle, indoor heat exchanger, four-way valve, gas-liquid separator, compressor; the four-way valve switches positions during the heating cycle; in the first operating mode, the heating cycle is executed, the compressor and outdoor fan run, the indoor fan stops, and hot water is produced quickly; in the second mode, the cooling cycle produces cooling gas; in the third mode, the heating cycle provides heating; in the second and third operating modes, the compressor, indoor and outdoor fans all run, and the hot water heat exchanger recovers the subcooled liquid, obviously producing hot water slowly.

The utility model belongs to vacuum pump cooling technical field, concretely relates to a cooling circulation system for mechanical pump, including vaporizer, the vaporizer includes the interlayer of outside setting, the vaporizer bottom is provided with airflow delivery pipeline, the vaporizer top is connected with buffer tank, the buffer tank top is connected with vacuum mechanical pump, vacuum mechanical pump is connected with water storage jar, the water storage jar bottom is linked with the vaporizer bottom, the vacuum mechanical pump outside is provided with heat exchange coil pipe, the interlayer bottom is connected with circulating water pump, and the circulating water pump is linked with heat exchange coil pipe, and heat exchange coil pipe is linked with the interlayer upper portion. The utility model discloses a vacuum mechanical pump and vaporizer realize independent refrigeration through the cooperation, and do not rely on external energy, and the heat exchange coil pipe is integrated on the vacuum mechanical pump, realizes the independent cooling of mechanical pump, need not external cooling water source, also does not cause additional energy consumption.

The invention provides a cold and hot circulating device, a control method and hydrogen production and storage energy equipment, and relates to the technical field of solid hydrogen storage, and the cold and hot circulating device comprises a hydrogen storage cavity provided with a plurality of hydrogen storage devices for solid hydrogen storage; the heating module adopts a heating piece arranged in the hydrogen storage cavity; the refrigeration module comprises an evaporator acting in the hydrogen storage cavity, and a compressor, a capillary tube and a condenser which are arranged outside the hydrogen storage cavity; the capillary communicates with the evaporator, the compressor and the condenser; refrigerating fluid in the evaporator is converted from a low-pressure and low-temperature liquid state into a high-pressure and high-temperature gas state through the compressor, the interior of the hydrogen storage cavity is refrigerated in the process, and the high-pressure and high-temperature refrigerating fluid enters the condenser through the capillary tube and dissipates heat to the external environment through the radiator arranged in the condenser. Refrigerating fluid is converted into low-temperature and low-pressure liquid from high-temperature and high-pressure gas and then enters the evaporator, and the problems that an existing hydrogen storage system is poor in temperature control effect, and the hydrogen storage efficiency is affected are solved.

The invention belongs to the technical field of metal heat treatment, and provides a heat treatment method for improving the strength and toughness of ultrahigh-strength martensitic steel. The heat treatment method comprises the steps of annealing, circulating solution treatment, high-temperature aging treatment, subzero treatment and tempering on the ultrahigh-strength martensitic steel in sequence. According to the method, transformation to an austenite structure is promoted through circulating solution treatment, the grain size is refined through heating-cooling circulating treatment, and the material strength is improved; through high-temperature aging treatment, strengthened alloy elements are enriched towards martensite boundaries, reversed austenite is formed, and the structure stability is improved; the diffusion coefficient of alloy elements can also be improved through high-temperature aging treatment, fine and dispersed precipitated phases can be separated out easily, and the strength and toughness are balanced; the transformation of retained austenite to martensite is promoted through subzero treatment, so that the content of the retained austenite is kept at a relatively low level; through effective coupling of circulating solution treatment, high-temperature aging treatment and subzero treatment processes, the martensitic steel keeps high strength, and meanwhile, the obdurability is improved.

Systems and methods for use in multi-stage regenerative cooling cycles that leverage an ejector as the motivating force to sub-cool a single refrigerant in a multi-stage regenerative cooling cycle. The multi-stage regenerative cooling cycle is more efficient than conventional muti-stage cooling cycles due to the placement of the ejector, which enables each stage to operate at a higher evaporating pressure and lower compression ratio.

Provided is a refrigerator in which a control unit determines whether or not a defrosting start condition is satisfied during operation of a cooling cycle; if the defrosting starting condition is met, whether a defrosting delay condition is met or not is judged; if the defrosting delay condition is not met, defrosting operation is started immediately; if the defrosting delay condition is satisfied, starting a defrosting operation at a delayed defrosting start time; the condition that the defrosting starting condition is met is the condition that the accumulated working time of the cooling cycle reaches the defrosting reference time; the energy-saving operation state or the normal operation state of the refrigerator in each unit time is stored in the memory; the control unit determines a delayed defrosting start time such that the defrosting operation is started in a section in which the energy-saving operation sections continuously exist. The defrosting operation comprises a pre-defrosting step and a defrosting step in which a defrosting heater works; the RPM of the fan in the first step and the RPM of the fan in the second step included in the pre-defrosting step are different and are both larger than the RPM of the fan in the working process of the cooling circulation.

The invention discloses a double-layer cover plate staged cooling system and method for high-temperature solid bulk materials, the cooling system adopts a first-stage cover plate and a second-stage cover plate which are arranged in a stepped manner to form a dual-seal structure, and an efficient and safe cooling process is realized through a staged uncovering strategy; the cooling method comprises the steps that after the first-stage cover plate is uncovered, the second-stage cover plate is continuously isolated from air, the high-temperature solid bulk materials easy to oxidize are protected against oxidation, meanwhile, an annular heat dissipation channel is formed in the exposed hollow area, and the heat dissipation efficiency is improved; and when the temperature of the high-temperature solid bulk material is reduced to be lower than a second preset temperature threshold value, the control module outputs a second-stage cover plate unlocking signal to uncover the second-stage cover plate, and the high-temperature solid bulk material is discharged. On the premise that the high-temperature solid bulk material easy to oxidize is effectively prevented from being oxidized, the cooling period is remarkably shortened, complete recycling of a solid bulk material heat preservation medium is achieved, and the problems that a traditional cooling mode is low in efficiency and large in resource waste are solved.

The invention discloses a water circulation cooling device for a diesel generating set, and relates to the technical field of generating sets. According to the water circulation cooling device for the diesel generator set, through the design of the water cooling device, liquid is pressurized through a water pump, so that the flowing speed of the liquid is increased, impurities in the liquid are adsorbed through a filtering mechanism, so that the effect of filtering the impurities is achieved, and the water cooling mechanism is arranged in a generator box and makes contact with electronic elements; the problem of'heat accumulation 'is solved, impurities are isolated through a separation plate, so that the impurities entering a cooling cycle are reduced, after the impurities are precipitated, part of the impurities are discharged along with liquid by opening a liquid discharge valve, and a motor controls a composite mechanism to rotate to rub the inner wall and the bottom of a separation box, so that the impurities are separated from the bottom of the separation box. Therefore, the effect of scraping and cleaning the component is achieved, and impurity retention is further reduced.