2569 results about "Coolant flow" patented technology

An energy scheduling system of a high-power liquid cooling charging pile belongs to the technical field of liquid cooling charging piles, and comprises a power scheduling module, a liquid cooling management module, a data acquisition and monitoring module, an energy storage and energy recovery module, a communication and interaction module, an intelligent scheduling module and a remote management and analysis module. Through the intelligent scheduling and energy optimization technology, power distribution can be adjusted in real time according to the vehicle demand and the power grid state, overload is avoided, and the charging efficiency is improved; and secondly, an advanced liquid cooling management technology is adopted, and temperature monitoring and cooling liquid flow rate adjustment are combined, so that heat balance and stable operation of the equipment under a high-load condition are ensured, the service life of the equipment is prolonged, and energy waste is reduced. In addition, the system can store redundant electric energy and release the electric energy in the peak load period of the power grid through the energy storage and energy recovery module, so that the power grid pressure is effectively reduced, and the energy utilization rate is also improved.

The invention relates to the technical field of liquid cooling servers, and discloses a liquid cooling server safety management system and method, and the method employs a multi-mode sensor network to synchronously collect the thermodynamic parameters of a liquid cooling system at 100 Hz, and constructs a three-dimensional thermal field digital twinborn model after the processing of an extended Kalman filtering algorithm. A distributed cooling strategy is designed based on a federated learning framework, and each node locally trains a thermal dynamic prediction model and is optimized by a central aggregator. A dynamic control instruction is generated by using a near-end strategy optimization algorithm, and cooling liquid flow distribution is optimized in combination with a quantum derivative simulated annealing algorithm. And designing a dual-threshold phase change control mechanism, establishing a block chain log to ensure traceability and tamper resistance of the instruction, and realizing closed-loop feedback control through a CAN bus. The system and the method can accurately monitor and intelligently control the liquid cooling system, improve the heat dissipation efficiency, reduce the power consumption, and guarantee the data safety and the system stability.

The invention discloses a safety monitoring system of a liquid cooling over-charging pile, and relates to the technical field of over-charging pile monitoring, the system comprises a data acquisition module, a data processing and analysis module, a dynamic model construction module, a temperature prediction module and a safety early warning module; according to the method, the dynamic model is constructed through the long short-term memory network LSTM, the complex nonlinear relation and the time sequence dependence of the multi-dimensional data are mined by using the gating mechanism of the dynamic model, the accurate characterization of the operation state of the liquid cooling over-charging pile is realized, the actual operation state of the equipment can be accurately described, the temperature data time sequence modeling is performed through the LSTM, and the accuracy of the temperature data time sequence modeling is improved. Parameters such as multi-source temperature and cooling liquid flow are fused, real-time prediction of the temperature change trend is achieved, the defect that a traditional algorithm is insufficient in temperature time sequence dependence capture is overcome, temperature abnormity can be recognized in advance, a safety threshold value is dynamically adjusted through a fuzzy logic algorithm, and self-adaptive threshold value adjustment is achieved in combination with parameters such as charging power. The problem that a traditional fixed threshold value is poor in adaptability is solved, and the early warning accuracy is improved.

A nozzle for a laser processing system is provided. A primary passage extends between the proximal end and the distal end of the nozzle body along a central longitudinal axis. At least one auxiliary passage is located within the body of the nozzle adjacent to the primary passage while substantially fluidly isolated from the primary passage. At least one conduit is located proximate the distal end of the body and in fluid communication with the at least one auxiliary passage. The at least one auxiliary passage is configured to flow a secondary fluid through the body of the nozzle in a first direction to impinge on a surface of the at least one conduit that is proximate the primary passage. The at least one conduit is configured to redirect the secondary fluid toward an exterior surface of the body in a second direction.

The invention relates to the technical field of heat management of energy storage systems, and discloses a heat management method of an intelligent distributed liquid cooling energy storage system. The method comprises the following steps: acquiring operation state parameters of a plurality of single batteries and optimizing timestamp synchronization; and processing the temperature data by adopting small-batch time series decomposition, and extracting change trend characteristics and abnormal hot spot positions. And based on the information, optimizing a heat exchange control rule base parameter set through a non-dominated sorting strategy, and generating optimized control parameters and priority rules. And in combination with inlet temperature and flow parameters of the liquid cooling system, a tabu search mechanism is utilized to decide a cooling liquid flow distribution scheme, and a branch control instruction is output. And finally, a flow constraint boundary is dynamically adjusted by adopting an approximate gradient projection technology, and a branch and bound strategy is fused to discretize and optimize a distribution path, so that the branch flow is finely regulated and controlled, and the thermal management precision and reliability of the energy storage system are improved. According to the method, the accuracy, adaptability and stability of thermal management of the liquid cooling energy storage system are improved.

The invention provides an intelligent harmonic dynamic compensation method and system for a data center. According to the method, server heat source surface temperature field distribution is monitored in real time through a distributed optical fiber temperature measurement array, and a dynamic impedance spectrum is generated; when the temperature gradient exceeds the flash evaporation critical value of the fluorinated cooling liquid, an active filter is activated to carry out dynamic impedance matching compensation on high-frequency harmonic current in the liquid cooling tank cabinet, and a pulse width modulation control signal of a circulating pump is generated; the compensation power of the filter and the turbulence intensity of the cooling liquid are synchronously adjusted by analyzing the coupling relation between the flowing vortex intensity of the cooling liquid and the dielectric polarization loss; when phase mismatch of a temperature field is caused by heat dissipation of multiple heat sources, a multi-band compensation strategy is reconstructed by utilizing frequency domain characteristics of a pulse width modulation signal and a compensation power historical value, and a cooling liquid branch flow distribution ratio and a filter frequency response curve are cooperatively adjusted. According to the technical scheme, the thermal stability and the electrical safety of the data center cooling machine room are improved.

The invention relates to the technical field of wind power operation and maintenance technologies, and discloses a combined heat dissipation system of a fan, the system comprises a multi-source sensing module, a decision control module, a heat dissipation execution module and a safety early warning module, and by setting multi-mode cooperative control, when fan heat dissipation regulation and control are carried out, the heat dissipation of the fan can be controlled in a multi-mode cooperative mode; a dynamic matching mechanism of temperature field characteristics and heat dissipation modes is established, and air cooling, liquid cooling and phase change strengthening modes are automatically switched in real time according to the temperature rise rate and the heat distribution gradient, so that the system can accurately adapt to heat dissipation requirements under different working conditions, timely heat dissipation of a high-temperature core area is guaranteed, the heat dissipation response accuracy is improved, and the service life of the system is prolonged. By arranging the three-dimensional thermal field balancing system, the hot area distribution difference of the bearing, the winding and the power module is recognized in real time, the cooling liquid flow and the airflow guide angle are dynamically adjusted, the three-dimensional thermal unbalance phenomenon in a traditional heat dissipation mode is eliminated, and it is guaranteed that the temperature gradient of all areas in the motor is always kept within a safety threshold value.

An immersion cooling system including an immersion coolant tank, a heat exchanger, and an eductor. The immersion coolant tank contains the heat generating electronic equipment. The heat exchanger removes heat absorbed by a first portion of a volume of dielectric cooling fluid within the immersion coolant tank. The eductor receives the first portion of the volume of dielectric cooling fluid through a first port from the heat exchanger as motive fluid and receives a second portion of the volume of dielectric cooling fluid from the immersion coolant tank through a second port as a suction fluid. The motive fluid may create suction by passing through the eductor, which suction draws the suction fluid into the eductor. The eductor may also mix the motive fluid with the suction fluid inside the eductor; and releasing the mixture of the motive fluid and the suction fluid through a third port.

A heat pump system for a vehicle includes: a valve, an electrical component cooling device, a battery cooling device, an indoor heating device, an indoor cooling device, a centralized energy device, and a chiller, wherein the second line is selectively fluidically-connectable to the first line connected to the radiator through the second valve; a condenser included in the centralized energy device is selectively fluidically-connectable to the first line or the second line through a third valve to condense the refrigerant supplied through the refrigerant line through heat-exchange with a coolant provided in a sixth line through which a coolant flows; and a first end portion of the third line is selectively fluidically-connectable to the sixth line through a fourth valve provided in the sixth line.

A heat pump system for a vehicle controls a temperature of a battery module by use of one chiller in which a coolant and a refrigerant are heat-exchanged and that improves heating efficiency by recovering heat from various heat sources in a heating mode of a vehicle to use them for indoor heating, including: a valve, an electrical component cooling device, a battery cooling device, an indoor heating device, an indoor cooling device, a centralized energy device, and a chiller, wherein a condenser included in the centralized energy device is connected to the second line through the second valve to condense the refrigerant supplied through the refrigerant line through heat-exchange with the coolant and is provided in a sixth line through which the coolant flows; and a first end portion of the third line is connected to a third valve provided in the sixth line.

The invention discloses a lithium ion battery immersed liquid cooling regulation and control method and device, terminal equipment and a storage medium, and relates to the field of lithium ion batteries, and the method comprises the steps: obtaining the current temperature data, historical temperature data and cooling liquid fluid parameters of a distributed array in a lithium ion battery, and determining the current temperature field distribution and predicted temperature field distribution; constructing a state space, and inputting the state space into the reference decision model, so that the model outputs corresponding actions according to the current state space by taking the minimum temperature difference of the battery module and the minimum cooling energy consumption as awards; according to the corresponding action, the micro electromagnetic valve and the cooling liquid pump are subjected to benchmark regulation and control; acquiring temperature data after reference regulation and control, and determining temperature deviation in combination with a preset temperature requirement; and regulating and controlling according to the temperature deviation. By implementing the method and the device, the stability of global temperature control is improved, so that the problem of temperature interference on other areas due to cooling liquid flow coupling caused by directly adjusting the opening degree of the valve according to local temperature difference in the prior art is solved.

The invention relates to the technical field of injection molding, and discloses a uniform temperature control injection mold which comprises a mold closing body, a plurality of cooling circulation modules are installed on the surface of the mold closing body, a macroscopic adjusting assembly is arranged in the mold closing body, and the macroscopic adjusting assembly comprises a plurality of heat conduction pipes fixedly connected to the interior of the mold closing body. Temperature difference spiral sheets are mounted in the heat conduction pipes, when the temperature in the middle of the cavity changes, hot air rises, the temperature difference spiral sheets are evenly heated and expand, then the abutting plate is pushed to move, a valve element of the flow valve is driven to rotate through a trigger arm and a swing piece, and the flow of cooling liquid is adjusted in real time; therefore, the macroscopic adjusting assembly can be accurately matched with thermal load differences of injection molding filling, pressure maintaining and cooling stages, the problem of local overheating or insufficient cooling caused by fixed waterway flow of a traditional mold is effectively solved, and the quality stability and performance reliability of automobile parts are improved by dynamically adjusting the flow of cooling liquid.

The invention relates to the technical field of liquid cooling server cabinets, in particular to a server liquid cooling branch flow regulation and control method based on impeller rotating speed, which comprises the following steps: analyzing branch cooling liquid flow requirements according to the target heat dissipation effect of each branch server, and further analyzing the output flow of a cooling distribution unit; according to an analysis module in the centralized controller, the theoretical rotating speed of a driving motor of each branch flow adapter is analyzed; checking the feasibility of a preset heat dissipation strategy according to the analysis result; and introducing a real-time feedback mechanism to dynamically compensate and correct the branch flow according to the inherent deviation between the ideal model and the actual working condition. Based on the method for regulating and controlling the flow of the liquid cooling branch of the server, differential regulation and control strategies of all the servers are combined, the rotating speed of the driving motor is precisely regulated through the integrated controller, self-adaptive distribution of the flow of the cooling liquid is achieved, and the dynamic heat dissipation requirement in a liquid cooling server cabinet is met.

A heat pump system of a vehicle is provided to adjust a temperature of a battery module by using a single chiller where a refrigerant and a coolant exchange heat, waste heat of the electrical component and the battery module are recollected, and a plurality of coolant flowing lines are formed by using a single valve according to a selected mode of the vehicle. The heat pump system includes: a valve; a first cooling apparatus; a second cooling apparatus; a third cooling apparatus; a first connection line; a second connection line; and a third connection line. The valve may be configured to operate such that one line among the first line, the second line, the third line, and the first connection line may be connected to another line or the same line, depending on a selected mode among the at least one mode.

The invention relates to a liquid cooling cabinet cooling liquid intelligent distribution method and system, and belongs to the liquid cooling field, the method comprises the following steps: S1, data collection: monitoring server equipment temperature information and cooling system information in real time; s2, judging the running state: comparing the monitoring information in the above step with a preset parameter threshold value, and judging the current cooling state; s3, adjusting the flow of the cooling liquid: dynamically adjusting the flow of the cooling liquid of the liquid cooling system according to the cooling state; and S4, performing abnormal early warning: continuing to perform data collection in real time after the flow is adjusted, judging the cooling state according to the collected information, returning to the step S3 until the temperature of the server returns to normal, and performing early warning when normal cooling cannot be performed. According to the method and the device provided by the invention, the stable and efficient operation of the server equipment is ensured through the steps of real-time monitoring, state judgment, flow adjustment, cooling state judgment, abnormal early warning, record feedback and the like.

The invention discloses a liquid cooling heat dissipation ducted fan which comprises a duct, a propeller, a motor, a supporting rib plate, a propeller hub shell and a liquid cooling mechanism. The propeller hub shell is fixed in the duct through the supporting rib plates; a motor and a liquid cooling mechanism are arranged in the propeller hub shell; a rotor output shaft of the motor is connected with a propeller and a fairing through a coupler. The fairing is arranged on the propeller in a sleeving mode, and an opening is formed in the fairing so that blades of the propeller can stretch out. The liquid cooling mechanism is at least partially formed in the propeller hub shell and the supporting rib plate, and the propeller hub shell and the supporting rib plate are of a sandwich structure to form a cooling liquid circulation channel of the liquid cooling mechanism. According to the liquid cooling heat dissipation ducted fan, the cooling liquid flow channels are arranged in the propeller hub shell and the supporting rib plates, the cooling liquid is cooled through the structure of the cooling liquid while the cooling liquid dissipates heat of the motor, the cooling liquid circulates in the propeller hub shell and the supporting rib plates, the motor is continuously cooled, and the heat dissipation efficiency is improved.

A stator, a motor, a powertrain, and a mechanical device. The stator includes a stator core, a coil winding, a first end plate, and a second end plate. The stator core includes a plurality of gaps extending along an axial direction, to form first coolant flow channels. The first coolant flow channel communicates with a liquid inlet region of the stator core. End faces of two ends of the stator core along the axial direction are respectively a first end face and a second end face. The first end plate is mounted on the first end face, and the second end plate is mounted on the second end face. A second coolant flow channel is formed between the first end plate and the first end face. A quantity of fittings of the motor is small, a leakage risk is low, and heat dissipation effect is good.

The invention relates to the technical field of temperature control, in particular to a temperature control management method and system for an electrolytic water tank and a medium. The method comprises the following steps: performing micro-channel structure processing on a main body shell of the electrolytic water tank, and embedding a modular micro-channel cooling plate to obtain geometric parameters of a cooling channel; identifying a key thermosensitive area of the electrolytic water tank; deploying a flexible micro temperature sensor array in the key thermosensitive area, and constructing a multi-point temperature monitoring network; collecting data in real time based on a multi-point temperature monitoring network to obtain real-time temperature data; and designing a micro-channel cooling liquid flow path based on cooling channel geometric parameter topological optimization to obtain a cooling liquid flow field structure. By integrating the micro-channel cooling structure and the high-density temperature monitoring network, efficient heat exchange and dynamic intelligent regulation and control of the electrolytic water tank cooling system are achieved, and the heat stability, safety and energy utilization efficiency are remarkably improved.

The invention provides a flow control method and device based on a PTC heater, the method is applied to a controller of a vehicle-mounted heating device, the vehicle-mounted heating device comprises the PTC heater, the controller is in communication connection with the PTC heater, and the method comprises the steps that the inlet and outlet temperature difference and the heating power of the PTC heater are obtained regularly; the performance parameters, the heating power and the inlet and outlet temperature difference of the cooling liquid are input into a preset flow calculation formula, and the corresponding cooling liquid flow is obtained through calculation; and obtaining an output value of the working parameter according to a pre-stored corresponding relationship between the cooling liquid flow and the working parameter under different output temperature differences so as to control the output temperature of the PTC heater according to the output value. According to the embodiment of the invention, the cooling liquid flow can be obtained through low-cost calculation, and a cooling liquid flow meter assembly is reduced; in addition, the output temperature of the PTC heater can be controlled according to the output value, and the heating efficiency of the PTC heater is improved.

A heat pump system for a vehicle is configured by including a valve, a first cooling apparatus, a second cooling apparatus, and a flow control line, to be configured for adjusting a temperature of a battery module by use of a single chiller where a refrigerant and a coolant are heat-exchanged, selectively recollecting waste heat of the electrical component and the battery module and using the same for heating of the vehicle interior, and forming a plurality of coolant flowing lines by a single valve according to selected mode of the vehicle.

A heat pump system for a vehicle may be capable of improving the overall efficiency of the system as well as simplifying the system. This may be achieved by adjusting the temperature of a battery module using a single chiller where the refrigerant and the coolant exchange heat, and by recollecting waste heat of the electrical components and the battery module and using it for heating the vehicle. Additionally, the overall efficiency of the system may be achieved by forming a plurality of coolant flowing lines by a single valve according to a selected mode of the vehicle.

The invention relates to the technical field of electric vehicles, and provides a cooling system for a hub motor, the hub motor and an electric vehicle, the cooling system for the hub motor comprises a base and a transmission shell, the base is internally provided with a first cavity and a second cavity, the second cavity is provided with a gear transmission assembly, the side wall of the first cavity is provided with a first cooling liquid flow channel, and the side wall of the second cavity is provided with a second cooling liquid flow channel; a second cooling liquid flow channel is formed in the side wall of the second cavity; the transmission shell is of a cylindrical structure with the first end open and the second end closed, the transmission shell is arranged outside the second cavity in a sleeving mode, the first end of the transmission shell is rotationally connected with the machine base in a sealed mode, the transmission shell is connected with the hub, an oil cavity is formed between the inner side wall of the transmission shell and the outer side wall of the machine base, and the oil cavity is communicated with the second cavity. Through the arrangement, the second cooling liquid flow channel can be used for cooling the second cavity, gear oil in the second cavity can enter the oil cavity, and the second cooling liquid flow channel can also be used for cooling the gear oil in the oil cavity, so that the problem of over-temperature failure of the motor and the gear can be avoided.

An embodiment integrated thermal management system for a vehicle includes a main refrigerant line configured to circulate a refrigerant sequentially through a compressor, an inner condenser, an outdoor heat exchanger, and an evaporator, an integrated chiller configured to perform heat exchange between a first coolant flowing through a battery, a second coolant flowing through an electronic component, and the refrigerant, a gas injection refrigerant line branched from a downstream point of the inner condenser of the main refrigerant line based on a flow direction of the refrigerant and connected to the compressor, and a gas injection heat exchanger configured to perform heat exchange between the refrigerant flowing through the gas injection refrigerant line and the refrigerant flowing through the main refrigerant line.

The invention discloses an immersed liquid-cooled battery pack, and relates to the technical field of battery thermal management. A plurality of battery cell columns, and in each battery cell column, a cooling flow channel is arranged in each battery cell gap or every at least one battery cell gap; the liquid inlet shunt tube is arranged close to the central area of the whole battery cell columns, one end of the liquid inlet shunt tube is provided with a first liquid inlet, the other end of the liquid inlet shunt tube is closed, and two sides are provided with first liquid outlets; the backflow collecting pipe comprises two backflow sections and a collecting section, the two backflow sections are located on the two sides of the whole battery cell columns, each backflow section is provided with a second liquid inlet, and the collecting section is provided with a second liquid outlet; the areas of the first liquid outlet and the second liquid inlet are gradually increased from one end of the liquid inlet shunt pipe to the other end of the liquid inlet shunt pipe, so that the flow of cooling liquid in each cooling flow channel of the battery cell column is balanced. By optimizing the layout of the cooling flow, the liquid inlet shunting pipe and the backflow collecting pipe, the use amount of the cooling liquid and the temperature difference between the blade and the battery cell can be reduced, and the space utilization rate and the cooling efficiency are improved.

A heat pump system for a vehicle is configured by including a valve, a first cooling apparatus, a second cooling apparatus, and a flow control line, to be configured for adjusting a temperature of a battery module by use of a single chiller where a refrigerant and a coolant are heat-exchanged, selectively recollecting waste heat of the electrical component and the battery module and using the same for heating of the vehicle interior, and forming a plurality of coolant flowing lines by a single valve according to selected mode of the vehicle.

The invention relates to the technical field of immersion liquid cooling data center cooling, and particularly provides a single-phase immersion liquid cooling server circulation cooling method and system, and the method comprises the steps: comparing the real-time temperature of a cooling liquid with a preset temperature threshold value, transmitting a first program instruction by a control system, and carrying out an immersion liquid cooling cabinet internal circulation mode; or a second program instruction is sent, and a heat exchange circulation mode is carried out; after the heat exchange circulation mode is started, a main liquid outlet pipeline is opened; the cooling liquid flows back to the liquid outlet of the immersed liquid cooling cabinet through the backflow branch pipeline, the real-time temperature of the cooling liquid and the preset temperature threshold value are continuously judged, and switching between the internal circulation mode and the heat exchange circulation mode of the immersed liquid cooling cabinet is achieved according to the comparison result. The system comprises an immersed liquid cooling cabinet, a branch pipeline valve, a main pipeline valve, a main liquid outlet pipeline, a pump, a heat exchanger and a branch pipeline. According to the invention, the topology reconstruction capability of the cooling liquid flow is realized, and local circulation and global circulation are dynamically switched according to the thermal load.

The utility model relates to the technical field of energy storage batteries, and discloses a battery frame and a battery pack. The battery frame comprises two X-direction side plates, two Y-direction side plates and a cover plate, each Y-direction side plate comprises a transverse plate and a vertical plate vertically arranged on the transverse plate, the transverse plates and the vertical plates are of an integrated structure, the two Y-direction side plates are oppositely arranged in the Y direction and are connected through the transverse plates, and the transverse plates are provided with a plurality of first cooling liquid flow channels arranged at intervals in the Y direction; the two X-direction side plates are oppositely arranged in the X direction, the two ends, in the X direction, of each Y-direction side plate are connected with the two X-direction side plates correspondingly, and the two Y-direction side plates and the two X-direction side plates define a frame structure with an opening in one end; the cover plate covers the opening of the frame structure. The battery frame is relatively high in structural strength, can be suitable for bearing a large-size battery module, and can improve the overall rigidity and modality of a battery pack.

A fluidized gas reactor includes a system for preventing a fluidizing gas comprising a reactant from premature reaction. The fluidized gas reactor includes a reaction chamber including a particle bed; a gas distribution plate having a plurality of openings therethrough, wherein each opening opens into the reaction chamber; and a plurality of vertical fluidizing gas inlet tubes, each of the fluidizing gas inlet tubes being in fluid communication with one of the openings in the gas distribution plate. Each fluidizing gas inlet tube is configured to receive a fluidizing gas and transport the fluidizing gas to the reaction chamber. A fluidizing gas source provides a stream of the fluidizing gas to the fluidizing gas inlet tubes. A coolant system prevents the fluidizing gas from nndergoing reaction before entering the reaction chamber. The coolant system has a fluid inlet; a coolant flow path in fluid communication with the fluid inlet, the coolant flow path being configured to cool each fluidizing gas inlet tube; and a fluid outlet in fluid communication with the coolant flow path. Each fluidizing gas inlet tube may include a particle outlet and a valve system, where the valve system allows the fluidizing gas flow to the fluidizing gas inlet tubes to be stopped; and allows recovery of particles from the particle bed while the fluidizing gas flow is stopped.

The embodiment of the invention provides a server and a liquid cooling hard disk frame. The server comprises at least two cold plates which are oppositely arranged at intervals, an inlet water segregator and an outlet water segregator, cooling cavities are integrally formed in the cold plates, and cooling liquid flows in the cooling cavities; an accommodating cavity is formed between the at least two cold plates and is used for inserting a hard disk module, so that the heat of the hard disk module is transferred to the cooling liquid in the cooling cavity; the inlet end of the cooling cavity is communicated to the flow channel of the inlet water segregator, so that cooling liquid flows into the cooling cavity from the inlet water segregator; the outlet end of the cooling cavity is communicated to a flow channel of the outlet water segregator, so that cooling liquid flowing through the cooling cavity is collected through the outlet water segregator; wherein the at least two cold plates are connected between the inlet water segregator and the outlet water segregator. According to the server and the liquid-cooled hard disk frame provided by the invention, the thickness of the cold plate can be reduced, and the deployment density of the hard disk is improved while the heat dissipation efficiency is ensured.

A cooling system for vehicles and a control method thereof improves indoor heating performance and fuel efficiency by controlling a flow rate of a coolant passing through a heater core together with an EGR cooler. A coolant having an increased temperature is first supplied to the heater core side through a flow stagnancy control to rapidly increase the temperature of the coolant flowing in the heater core, thereby improving heating performance. A warm-up feature is improved through an exhaust heat recovery function by a heat exchange between the exhaust gas and the coolant in the EGR cooler, thereby improving efficiency of fuel.