121 results about "Radiator (engine cooling)" patented technology

The invention belongs to the field of exhaust emission, and discloses a device and method for adjusting the active temperature of an SCR catalyst through a thermoelectric power generation system.The device comprises an engine cooling system, the engine cooling system is connected with a cold end radiator of the thermoelectric power generation system, and a thermoelectric power generation plate is connected with a storage battery through a power supply module; the second temperature sensor is arranged at an outlet of the electric heating device, the first temperature sensor and the second temperature sensor are connected with the engine control unit, the engine control unit is connected with the power supply module, the electric heating device is connected with the storage battery through the power supply module, and the engine control unit is used for controlling charging and discharging of the storage battery. When the SCR device is in the efficient temperature interval, the engine control unit controls the power supply module to charge the storage battery through the thermoelectric power generation system; and when the SCR device is out of the efficient temperature interval, the storage battery is used for discharging the electric heating device or controlling the engine cooling system to use a cold end radiator of the thermoelectric power generation system to forcibly dissipate heat so as to adjust the temperature of the SCR device.

The invention relates to the technical field of tractor heat dissipation, in particular to a modular integrated tractor heat management method which comprises the steps that an engine radiator, a condenser, an engine oil radiator and a hydraulic radiator are arranged on the air outlet side of a cooling fan with the fan blade angle adjustable in a centralized mode; when the tractor operates in a working condition state, actual temperature data of an engine heat dissipation module, a transmission system heat dissipation module, a hydraulic system heat dissipation module and an air conditioning system heat dissipation module are collected; preset temperature difference data and preset fan rotating speed data corresponding to the working condition state are obtained; calculating an actual temperature difference value corresponding to the preset temperature difference value; and judging the actual temperature difference value of each item and the corresponding preset temperature difference value in real time, and controlling the wind direction and the rotating speed of the cooling fan in real time according to the judgment result. The invention further provides an electro-hydraulic control heat dissipation system applying the thermal management method. Heat dissipation and reverse blowing cleaning self-cleaning are carried out on all radiators of the tractor, the power loss is reduced, and the energy loss is reduced.

The invention relates to the technical field of automobile radiators. The heat dissipation control method of the automobile radiator, the radiator, the heat dissipation pipe, the storage medium and the electronic equipment are provided. According to the scheme, the heat dissipation efficiency of the automobile radiator can be remarkably improved. On one hand, different from the mode that a traditional radiator only depends on external gas for heat exchange, a dual heat exchange system of the second cooling liquid, the external gas and the first cooling liquid is constructed by means of the characteristic that the first cooling liquid does not directly participate in circulation and keeps low temperature. The second cooling liquid not only can dissipate heat through conventional gas-liquid heat exchange in circulation, but also can conduct heat through the low-temperature cooling liquid in the first flow channel adjacent to the second cooling liquid in an attached mode, the heat dissipation effect is further enhanced, and therefore the cooling efficiency of the engine cooling liquid is improved in an all-around mode, and reliable guarantee is provided for stable operation of an engine. And on the other hand, the temperature of the engine and the temperature of the first cooling liquid are obtained in real time, and the flow and the flow speed of the second cooling liquid are adjusted according to needs, so that the engine can keep proper working temperature under different working conditions, and performance loss caused by insufficient heat dissipation is effectively avoided.

The invention provides an extended-range power assembly and an electric vehicle. The power assembly comprises a motor, an engine and a liquid cooling system, the liquid cooling system comprises a motor cooling liquid loop, an engine cooling liquid loop and a heat exchange plate, and the motor cooling liquid loop is used for exchanging heat with lubricating oil in the motor through a heat exchanger. The engine cooling liquid loop is used for conveying cooling liquid to the engine. The heat exchange plate comprises two internal flow channels which are independent of each other. One internal flow channel is used for receiving cooling liquid flowing out of a radiator of a motor cooling liquid loop and conveying the cooling liquid to a heat exchanger. The other internal flow channel is used for receiving cooling liquid flowing out of the engine through a valve and conveying the cooling liquid to a radiator of an engine cooling liquid loop. According to the extended-range power assembly, waste heat of the engine can be used for heating lubricating oil of the motor in the low-temperature environment, and therefore the working efficiency of the power assembly is improved.

The invention relates to the technical field of limousines, and particularly discloses a heat dissipation and ventilation structure for a limousine engine, comprising: an engine body mounted in a limousine head; the protective cover frame is installed in a motor home head, a through hole is formed in one side of the protective cover frame, and a fan blocking cover is installed on one side of the through hole; the air duct is installed at the bottom of the motor home head, air inlets which are annularly distributed at equal intervals are formed in one side of the air duct, and a dustproof assembly is installed on one side of the air duct; the exhaust assembly is installed at the bottom of the shield frame and extends out of the bottom of the motor home head. According to the motor home engine, low-temperature external airflow is mixed with airflow blown by the engine cooling fan, the engine radiator is fully cooled, the heat dissipation performance of the motor home engine is improved, the airflow blown into the shield frame by the engine cooling fan can be discharged out of the motor home, an air circulation channel is achieved, and the heat dissipation speed of the motor home engine is increased.

This utility model discloses an opening structure for a top cover, belonging to the field of heavy vehicle engine cooling. It includes a top cover plate with a ventilation structure. The ventilation structure includes ventilation holes on the surface of the top cover plate, and an air guide assembly is provided on the cover of the ventilation holes. The air guide assembly is open on one side. By providing a ventilation structure including ventilation holes, an air guide assembly, and a protective assembly on the top cover plate, the airflow direction can be changed by the air guide assembly, preventing hot air from directly flowing back to the radiator and improving heat dissipation efficiency.

The present invention belongs to the technical field of diesel engine cooling, and in particular, is a parallel high-efficiency cooling system and method for diesel engines, comprising a diesel engine body, wherein a cylinder head connected to the cylinder head is arranged at the upper part of the engine body, and a water pump connected to the cylinder head is arranged at the lower exhaust side of the engine body near the front end of the engine body; an oil cooler connected to the cylinder head is arranged at the rear end of the water pump, and the water inlet and return channels of the oil cooler are connected to the water channel of the water pump; a thermostat is connected to the front end output end of the cylinder head through a pipeline; and a radiator is connected to the front end output end of the thermostat through a pipeline. The present invention arranges the coolant entering the oil cooler in parallel with the coolant channel entering the engine body, so that the cooling of the oil cooler and the engine body water jacket does not affect each other, thereby achieving the purpose of efficiently cooling the engine oil, improving the working efficiency of each system, and at the same time ensuring that the coolant flow distribution of the cylinder water jacket and the cylinder head water jacket is uniform, thereby improving the reliability of the diesel engine.

The utility model discloses a diesel engine cooling system cleaning device, and belongs to the field of diesel engine radiator cleaning.The cleaning device comprises a base frame and a cleaning box arranged on the base frame, a water pump box used for supplying water is arranged at the upper end of the cleaning box, and a movable door plate used for fixing a radiator is arranged at one end of the cleaning box; a cleaning mechanism is arranged in the cleaning box, a plurality of pulleys are arranged at the lower end of the base frame, and the cleaning mechanism comprises two groups of positioning seats arranged on the base frame at equal intervals and driving gears rotationally mounted on the positioning seats; after a water pump in a water pump box applies pressure to supply water, the water enters a liquid guide cavity through a liquid guide pipe and a liquid receiving pipe and is dispersed to supply water to a corresponding fixing frame and a liquid spraying nozzle to wash a radiator located in the center, and in the washing process, a servo motor is started to drive a gear to rotate to drive a liquid guide circular plate to rotate; and the flushing range is wider, the flushing effect is more uniform and comprehensive, and the cleaning efficiency is better.

The invention discloses a two-way waste heat recovery cooling control system and method for a hybrid power forklift in the technical field of hybrid power forklift cooling systems, and the system comprises an engine heat dissipation loop which comprises a radiator assembly and an engine assembly which are connected end to end; the motor electric control heat dissipation loop comprises an engine assembly, a first electronic control valve, a plate heat exchanger and a first electronic water pump which are connected end to end in sequence; the engine heat exchange branch comprises a plate heat exchanger, a second electronic control valve, a motor master control assembly and a second electronic water pump which are connected end to end in sequence; and the motor electric control assembly heat exchange branch comprises a radiator assembly, a second electronic water pump, a motor master control assembly and a third electronic control valve which are connected end to end in sequence. The technical problems that in the prior art, a hybrid power forklift is poor in cold starting performance and low in waste heat recovery efficiency can be solved.

The invention discloses an engine thermal management system, engineering machinery and a thermal management system control method, and belongs to the technical field of engine heat dissipation. In the thermal management system, an engine, a water pump and a radiator are connected to a main circulation heat dissipation loop, and a temperature sensor is installed at a water outlet of the engine; the phase change heat storage loop is connected to the two ends of the radiator in parallel and connected with a first control valve and a phase change unit, and the phase change unit is connected with the radiator in parallel through the first control valve. A second control valve and a waste gas heat exchanger are connected to the waste gas waste heat recovery loop, and a cooling liquid passage of the waste gas heat exchanger is connected with the main circulation heat dissipation loop in parallel through the second control valve; the controller is configured to be used for receiving engine operation parameters and engine water temperature signals collected by the temperature sensor and controlling the rotating speed of the water pump and the opening and closing states of all the control valves according to the received data, switching of the cold start warm-up working condition, the normal heat dissipation working condition and the high-load auxiliary heat dissipation working condition is achieved, and the heat efficiency of the engine is improved.

The invention relates to an engine cooling device. The engine cooling device includes: a cylinder block lower portion which is a lower portion of a cylinder block; the cylinder body upper part is the upper part of the cylinder body; a cylinder head of the engine; an exhaust gas cooling unit that cools exhaust gas of the engine; a heat sink that dissipates heat of the coolant; a first path that bypasses the radiator to circulate the coolant through the cylinder block lower portion, the cylinder block upper portion, the cylinder head, and the exhaust cooling portion; a second path that bypasses the block lower portion to circulate the coolant through the radiator, the block upper portion, the cylinder head, and the exhaust cooling portion; and a flow rate control mechanism that increases the flow rate of the coolant flowing through the second path relative to the flow rate of the coolant flowing through the first path.

The utility model relates to the technical field of automobile parts, in particular to an engine cooling device which comprises a cooling water pump mechanism used for an automobile engine, a radiator mechanism and a thermostat, the cooling water pump mechanism comprises a water pump body, and a cooling fan acting on the radiator mechanism is movably installed at one end of the water pump body through a linkage assembly. The water pump body is in through connection with the radiator mechanism and the thermostat through the cooling liquid pipe and the low-temperature small circulating liquid pipe respectively, the thermostat is in through connection with the radiator mechanism through the high-temperature large circulating liquid pipe, the whole device can take away heat of an engine, the temperature is kept within a proper range when the engine operates, and the service life of the engine is prolonged. The engine is sufficient in power and low in oil consumption, knocking is prevented, and the rejection rate is greatly reduced.

The invention discloses a fuel cell engine cooling system, a vehicle and a monitoring method, and relates to the technical field of vehicles. The system comprises an electric pile, a radiator, a water pump, an expansion water tank, a deionizer, a plurality of flowmeters and a plurality of pressure sensors, the galvanic pile, the radiator and the water pump are sequentially connected to form a first loop; the electric pile, the deionizer and the water pump are sequentially connected to form a second loop; a water supplementing opening of the expansion water tank is connected to the first loop, a first water return opening of the expansion water tank is connected to the second loop, and a second water return opening of the expansion water tank is connected to a pipe section connected with a cooling liquid outlet of the galvanic pile; the plurality of flow meters comprise a first flow meter at the inlet of the radiator and a second flow meter at the cooling liquid inlet of the electric pile, and the plurality of pressure sensors comprise a first pressure sensor at the outlet of the radiator and a second pressure sensor at the cooling liquid inlet of the electric pile. Through flow and pressure monitoring, the probability that the fuel cell engine fails to start or the reaction does not reach the standard at low temperature can be reduced.

The invention relates to a radiator fan cowl for a new energy battery pack and an engine cooling system of an automobile, which belongs to the technical field of automobile cooling and comprises a motor mounting hub and a fan protection inner ring of the fan cowl. A plurality of groups of hub inner ring protection plate V-shaped grooves which are beneficial to air flowing and improve the air flowing operation efficiency are formed in the hub inner ring protection plate; the twelve supporting and fixing spokes are distributed in the circumferential direction of the motor installation hub, and the included angles between any two adjacent supporting and fixing spokes are different from each other. An airflow path is optimized through the twelve supporting and fixing spokes distributed at unequal angles, airflow resistance is reduced by matching with the flow guide effect of the V-shaped groove of the hub inner ring protection plate, it is ensured that more air flows through a radiator and a motor, and the heat dissipation effect is greatly improved; airflow resonance is avoided due to the design of the spokes with different angles, noise generated by airflow turbulence is reduced by matching with angle optimization of the windward sides and the leeward sides of the spokes, and quietness of automobile driving is improved.

The utility model relates to the field of engine cooling, and discloses a self-cooling automobile engine which comprises a radiator shell, a circulating radiating pipe is fixedly mounted in the radiator shell, the liquid outlet end of the circulating radiating pipe extends to the outside of the radiator shell, and a connecting pipeline is fixedly mounted at the liquid outlet end of the circulating radiating pipe; when the temperature of the cooling liquid of the automobile engine rises, the first electric control valve is closed, the second electric control valve is opened, and the cooling liquid in the circulating heat dissipation pipe enters the S-shaped cooling pipe through the liquid inlet connecting pipe and exchanges heat with the cooling liquid in the liquid storage shell; the temperature of the cooling liquid for the automobile engine is reduced, the cooling liquid is further cooled through heat absorption of the communicating pipe, the second heat absorption pipeline and the heat absorption pieces, finally, the cooling liquid is discharged through the liquid discharging pipeline, and rapid cooling of the cooling liquid is achieved. The efficiency is effectively improved; and the energy consumption is controlled.

The utility model discloses a cooling system of a power assembly and belongs to the technical field of engine cooling. The water pump is communicated with the engine water jacket, the engine water jacket is communicated with the thermostat shell and the thermostat, the shell water outlet end of the thermostat shell is communicated with the second radiator, the second radiator is communicated with the transmission oil cooler, and the transmission oil cooler is communicated with the engine oil cooler water inlet end of the engine oil cooler. The engine oil cooler is communicated with the first water inlet end of the water pump; the water outlet end of the thermostat is communicated with the first radiator, and the first water outlet end of the first radiator is communicated with the second water inlet end of the water pump. The second water outlet end of the first radiator is communicated with the liquid supplementing pot, and the water outlet end of the liquid supplementing pot is communicated with the third water inlet end of the water pump. The second radiator is additionally arranged, heat dissipation of engine oil and transmission oil is enhanced, the requirement for dissipating heat generated by a high-speed and large accelerator of a vehicle is met, and engine oil is prevented from losing efficacy due to overheating and even damaging parts.

An engine thermal management system (1) and a vehicle. The engine thermal management system (1) comprises an engine cooling system (3), an engine lubrication system (2) and an engine radiator (10). The engine radiator (10) is provided with a first flow channel (101) and a second flow channel (102), wherein the first flow channel (101) and the second flow channel (102) are isolated from each other and can exchange heat with each other, the first flow channel (101) allows a cooling liquid to flow therethrough, and the second flow channel (102) allows engine oil to flow therethrough. The first flow channel (101) of the engine radiator (10) is connected to the engine cooling system (3), and the second flow channel (102) of the engine radiator (10) is connected to the engine lubrication system (2).

The utility model belongs to the technical field of thermal management of automobiles, and particularly relates to an engine cooling system and an automobile, a water cooling jacket assembly of the system comprises a cylinder cover water jacket, a cylinder body water jacket and a built-in water channel, and the built-in water channel is provided with a water channel water inlet, a water channel water outlet and a bypass connector; the cylinder cover water outlet is sequentially connected with a first pipeline, a thermolator, a radiator, a third pipeline and a first water pump; the first pipeline is provided with a fourth pipeline connected to the warm air module, and the fourth pipeline is provided with a sixth pipeline connected to the bypass connector. The engine oil cooler is connected with the cylinder body water outlet and the EGR cooler, the EGR cooler is connected to the water channel water inlet, and the water channel water outlet is connected to the first water pump. According to the engine cooling system, the built-in water channel is arranged in the water jacket assembly, the built-in water jacket can be communicated with the EGR cooler, the warm air module and the water pump, long pipelines between parts at different positions can be omitted, the structure of the engine cooling system is simpler and more compact, and the engine cooling system can meet different thermal management requirements.

The application discloses an engine cooling system and a thermostat structure, which comprises an engine cooling system body port and a thermostat body, wherein the engine cooling system body port is composed of a thermostat mounting seat, a connecting pipe, a radiator, a radiator fan, a temperature sensor, a fan assembly, a cooling liquid separator and a water pump; the fan assembly is mounted on the radiator; two groups of radiator fans are mounted on the fan assembly; a radiator pipe and the temperature sensor are mounted on the fan assembly; the thermostat body is mounted on the thermostat mounting seat of the engine cooling system body port; and the water pump is mounted on the end of the thermostat mounting seat. The engine cooling system and the thermostat structure have the advantages that the pressing seat is clamped inside the containing groove, the pressing seat and the containing groove are both provided in an S-shaped section, the pressing seat and the containing groove are sealed through a sealing gasket, and the pressing seat is locked through a fixing bolt, so that liquid paraffin is prevented from overflowing between the pressing seat and the containing groove, paraffin is prevented from overflowing, and the reliability of the thermostat body is improved.

To provide an engine cooling device that enables suppression of deterioration of fuel economy.SOLUTION: An engine cooling device includes: a block lower part that is a lower part of a cylinder block of an engine; a block upper part that is an upper part of the cylinder block; a cylinder head of the engine; an exhaust gas cooling part that cools exhaust gas of the engine; a radiator that radiates heat of cooling water; a first path that bypasses the radiator and causes the cooling water to circulate in the block lower part, the block upper part, the cylinder head and the exhaust gas cooling part; a second path that bypasses the block lower part and causes cooling water to circulate in the radiator, the block upper part, the cylinder head and the exhaust gas cooling part; and a flow rate control mechanism that when a temperature of the cooling water flowing in the first path is a warm-up completion temperature or higher, increases a flow rate of the cooling water flowing in the second path relative to a flow rate of the cooling water flowing in the first path compared to when the temperature of the cooling water is lower than the warm-up completion temperature.SELECTED DRAWING: Figure 1

The application discloses an engine heat dissipation system, method and engineering machinery, and solves the technical problems of difficult cooling power matching of a radiator and high temperature of a power cabin affecting ECM performance and service life of an engine when a high-power engine water radiator and an intercooling radiator share a set of cooling fans. The application relates to an engine heat dissipation system, wherein the engine is arranged in a power cabin, the engine water radiator and the air inlet intercooling radiator adopt an up-down structure arrangement, the intercooling radiator is arranged inside the power cabin, the water radiator is arranged outside the power cabin, the water radiator wind guide cover adopts an inclined angle structure design, hot air is discharged upwards, hot air backflow is avoided, and the temperature of the power cabin is effectively reduced. The two radiators adopt hydraulic motor driven heat dissipation fans for independent heat dissipation, the flow of the heat dissipation motor is adjusted to realize stepless speed regulation of the fans, and reasonable control of the water temperature of the engine system, the air inlet temperature and the cabin temperature is achieved.

An engine cooling device includes: a block lower portion that is a lower portion of a cylinder block; a block upper portion that is an upper portion of the cylinder block; a cylinder head of the engine; an exhaust cooling portion that cools an exhaust gas of the engine; a radiator that dissipates heat of a coolant; a first path that bypasses the radiator to cause the coolant to circulate through the block lower portion, the block upper portion, the cylinder head, and the exhaust cooling portion; a second path that bypasses the block lower portion to cause the coolant to circulate through the radiator, the block upper portion, the cylinder head, and the exhaust cooling portion; and a flow rate control mechanism that increases a flow rate of the coolant flowing through the second path with respect to a flow rate of the coolant flowing through the first path.

The utility model discloses a heat management system and a vehicle. The heat management system comprises a high-pressure heat exchange loop, a battery pack, an air conditioning system, a passenger compartment heat exchange system, an engine cooling system and an exhaust gas recirculation heat exchange loop. The air conditioning system comprises a compressor, a condenser, an evaporator and a first heat exchanger, the compressor, the condenser and the evaporator are connected in series, the first heat exchanger and the evaporator are connected in parallel, and the first heat exchanger exchanges heat with the battery pack; the engine cooling system comprises an engine, a first radiator and a first water pump which are connected in series, and the exhaust gas recirculation heat exchange loop and the first water pump are connected in series; the exhaust gas recirculation heat exchange loop comprises a second heat exchanger, a control valve, a third heat exchanger and a first three-way pipe, the control valve is communicated with the second heat exchanger, the third heat exchanger and the first three-way pipe, and the third heat exchanger and the evaporator form a passenger compartment heat exchange system.

The embodiment of the invention discloses a thermal management system, a control method of the thermal management system, an engine and a vehicle. The heat management system comprises an electric control water pump, a heat management module, an engine body assembly, a heater assembly and a radiator assembly. The output end of the electric control water pump is connected with the input end of the engine body assembly, the output end of the engine body assembly is connected with the input end of the heat management module, the first output end of the heat management module is connected with the input end of the heater assembly, and the output end of the heater assembly is connected with the input end of the electric control water pump. The second output end of the heat management module is connected with the input end of the radiator assembly, and the output end of the radiator assembly is connected with the input end of the electric control water pump. According to the technical scheme, precise control over the engine temperature and the engine cooling liquid flow is achieved, and the effects of rapid engine warming and high-temperature protection can be achieved.

The invention relates to a water pump and thermal management system integrated structure, and belongs to the technical field of engine cooling. The integrated structure comprises an engine cylinder cover, a cooling water pump arranged on the engine cylinder cover, a water pump cover body covering the cooling water pump in a sealing mode and a radiator, the water pump cover body is provided with a cooling cavity allowing the cooling water pump to be installed, and the cooling cavity is communicated with an inner flow channel of the engine cylinder cover. The water pump cover body is further provided with a leakage water storage cavity, the leakage water storage cavity is communicated with an overflow hole of the cooling water pump, and evaporation holes communicated with the leakage water storage cavity are formed in the water pump cover body. The leaked water storage cavity plays a role in temporarily storing slight leakage generated by the water pump, the probability that cooling liquid leaks to other parts of an engine is reduced, and the service life of the engine is prolonged.

The utility model belongs to the technical field of thermal management of automobiles, and particularly relates to an opposed engine cooling system and an automobile. The opposed engine cooling system comprises a water pump, a water-cooled jacket assembly, a temperature sensor, a thermolator, a radiator, a supercharger, an engine oil cooler and a warm air module; wherein the water cooling jacket assembly comprises an external water jacket, a water jacket and a cylinder cover water jacket, the water jacket and the cylinder cover water jacket are oppositely arranged, the engine oil cooler is connected to one of the first pipelines and the external water jacket through an eighth pipeline, and the supercharger is correspondingly connected to the cylinder body water jacket and the external water jacket through a ninth pipeline. According to the technical scheme, the external water jacket is arranged in the water jacket assembly of the opposed engine cooling system, the external water jacket can be communicated with the water pump, the engine oil cooler and the supercharger which are located on the different sides of the engine, long pipelines between parts at different positions can be omitted, the structure of the cooling system is simpler and more compact, and the cooling efficiency is improved. And the opposed engine cooling system can realize multiple cooling liquid circulation modes so as to meet different thermal management requirements.

This utility model provides a combined air-water-oil radiator for mining trucks, relating to the field of radiator technology. It integrates air-cooled, water-cooled, and oil-cooled modules within a single frame, effectively combining the functions of cooling the turbocharger intake, the engine cooling system's coolant, and the vehicle's required oil circuit cooling. This significantly reduces the space occupied by traditional independent radiators and simplifies the overall vehicle cooling system layout. Each cooling module uses multiple parallel cooling tubes, combined with a cooling fan fixed to the front of the frame, enabling efficient cooling of air, water, and oil, ensuring stable operation of the engine and related oil circuit components under complex and harsh conditions. An expansion tank fixed to the top of the frame allows for convenient addition of coolant to the water-cooled module. The high degree of integration of the overall structure not only reduces installation difficulty but also facilitates subsequent maintenance, solving the problems of large space occupation and complex installation and maintenance in existing mining truck cooling systems.

The invention relates to the technical field of motorcycle engines, in particular to a water-cooled motorcycle engine cooling water passage structure which comprises a cylinder body, a second box body is fixedly connected to the top end of a first box body, the second box body is communicated with a radiator through a first pipeline, and a circuit switching mechanism is arranged in the second box body. The circuit switching mechanism comprises a bimetallic strip, the bottom end of the bimetallic strip abuts against a push rod, the bottom end of the push rod penetrates through the copper plate and is fixedly connected with a movable column, a through groove is formed in the movable column, and the upper portion of the front side of the movable column is slidably connected with a connecting block. The top end of the second pipeline is fixedly connected to the bottom end of the first pipeline, the flowing path of part of cooling liquid can be actively changed through the path changing mechanism, and therefore part of cooling liquid with the high temperature is replaced with standby cooling liquid, and the situation that the overall temperature exceeds the effective action range of the radiator due to the fact that the volume of the cooling liquid is limited is prevented.