740 results about "Expansion tank" patented technology

The invention aims to provide a heating system of a power battery of a pure electric automobile and a control method thereof, which are used for eliminating the influence of low temperature on the performance of the power battery of the pure electric automobile to ensure that the pure electric automobile can be used in severe cold areas in winter. The heating system comprises a battery heating device which is arranged in a battery pack, wherein the battery heating device is provided with a hollow radiating fin; and the radiating fin is provided with a water inlet and a water outlet. The heating system is characterized by also comprising an auxiliary heater, wherein the auxiliary heater is connected with a fuel supply device; a heat exchanger is arranged in the auxiliary heater; the water inlet of the heat exchanger is communicated with the water outlet of an expansion water tank by a water pump and a water pipe; the water outlet of the heat exchanger is communicated with the water inlet of the radiating fin by an electric control valve; the water outlet of the radiating fine is communicated with the water inlet of the expansion water tank; the electric control valve, the auxiliary heater and the water pump are connected with a vehicle controller and are controlled by the vehicle controller; and the vehicle controller is also connected with a battery management system.

An intelligent multi-loop thermal management system for and electric vehicle has components including a battery pack, an electric-drive module, an on-board charger a DC/DC converter, a battery radiator, a battery refrigerator, a motor radiator, an electric water pump, an electric oil pump, an expansion tank, a PTC heater, a heat exchanger, an electric compressor, a condenser, an evaporator, a receiver drier, and a heater core. The system also includes an electric-drive module having a drive motor and a motor control unit. The components are thermally connected to each other by using a pipeline and a four-way valve, a three-way valve, a straight-through valve, and an electronic expansion valve that are disposed in the pipeline, to form a plurality of loops that separately performs thermal management and control the battery pack, the electric-drive module, and a passenger compartment air conditioner.

The invention relates to a high-heat-discharge-quantity refrigerating and heating temperature control system for a reaction kettle. The high-heat-discharge-quantity refrigerating and heating temperature control system comprises a reaction kettle, wherein one end of the reaction kettle is sequentially connected with a heating pipe, an electric proportioning regulating valve, a first cold storage tank and an evaporation heat exchanger through a fourth pipeline, the output end of the evaporation heat exchanger is sequentially connected with a first circulation pump, a first one-way valve, an expansion tank and an exhaust valve through a first pipeline, the exhaust valve is connected to the other end of the reaction kettle through a fifth pipeline, the two ends of the evaporation heat exchanger are connected with a refrigerating machine, the refrigerating machine is structurally characterized in that one end of the evaporation heat exchanger is sequentially connected in series with a gas-liquid separator, a compressor, an oil separator, a condenser, a drying filter, a second cold storage tank, an electromagnetic valve and an expansion valve through a third pipeline, the outer end of the expansion valve is connected with the other end of the evaporation heat exchanger through an eighth pipeline, the refrigerating machine is positioned between the electromagnetic valve and the second cold storage tank and is connected with the third pipeline through the second pipeline, and an electronic expansion valve is arranged on the second pipeline. The work reliability is good.

The invention provides an electric automobile cooling system, comprising an electric water pump (1), an electric machine controller (MCU) (2), an electric machine (3), a radiator (5), a fan (4), an expansion tank and hose (6); wherein the electric machine (3) and the electric machine controller (2) are arranged in the front cabin of the electric automobile. The electric water pump (1), electric machine controller (2), electric machine (3) and the hose for the radiator (5) are connected with each other to form a cooling circuit; the fan is arranged at the back part of the radiator and the headwind and the cold air driven by the fan exchange heat with the radiator. When one of the electric machine temperature and the electric machine controller temperature achieves the preset value, the cooling system starts to work. When the two temperatures are lower than the preset value, the cooling system stops to work. Therefore the service life of the electric water pump is prolonged and the reliability of the cooling system is increased.

The invention relates to a system for testing heat-transfer performance of a gas-water-oil heat interchanger, and is composed of a steady air system, a cold water system, a hot water system and a oil system. The steady air system: a voltage-stabilizing case output end is connected with inlets between the first steady air flow gauge and the first steady air pneumatic butterfly valve or the second flow gauge and the second steady air pneumatic butterfly valve and high-pressure centrifugal fan, wherein, steady air bypass electric control valve is connected between the inlet and the outlet of the high-pressure centrifugal fan; the hot water system: an expansion water tank, an electric heater water tank and an outlet are connected to the water pump, and water enters into the heat interchanger to be measured through the bypass of the electric three-way valve, the water flow gauge and the electromagnetic valve, thereby forming a closed loop system; the cold water system: compared with the hot water system, the system does not have an expansion water tank; the oil loop system is a open and close type circulating system: the outlets of the expansion fuel tank and the fuel-tank are connected to the oil pump, oil enters into the heat interchanger to be measured through the bypass of the electric three-way valve, the oil flow gauge and the electromagnetic valve, thereby forming a closed circulation for testing the heat exchange performance of the oil-water, oil-gas heat interchanger.

The invention discloses an exhaust gas waste heat recovery and emission reduction comprehensive application system for a coal-fired boiler in a thermal power plant. In the invention, along the flow direction of flue gas, an air preheater, a first low temperature economizer, a low temperature dust collector, a draught fan, a second low temperature economizer and a desulfuration island are sequentially arranged on a pipe between the boiler and a chimney, wherein, the inlet of the air preheater is respectively communicated with a cold primary air pipe and a cold secondary air pipe; the cold secondary air pipe is provided with a secondary air heater; the secondary air heater is communicated with the second low temperature economizer via a coal-water pipe; the coal-water pipe is provided with an expansion tank and a water pump; and the low temperature economizer is divided into two segments, wherein, one segment is used for heating condensed water, and the other section is used for heating the cold secondary air at the inlet of the air preheater by virtue of a water medium. The exhaust gas waste heat recovery and emission reduction comprehensive application system has the beneficial effects of maximally utilizing the gas waste heat, reducing heat consumption of a machine set, lowering energy consumption of equipment such as the dust collector, the draught fan, a blower and the like, reducing the power consumption rate of the thermal power plant, improving the economical efficiency of the thermal power plant, more efficiently saving the energy consumption, and benefiting construction of the lowcarbon society.

The invention discloses an integrated thermal management system for electric vehicles. The integrated thermal management system comprises a battery integrated thermal management system, a motor integrated thermal management system and a refrigeration and heating cycle system of a heat pump air conditioner, wherein the battery integrated thermal management system comprises a first water pump, a first phase change heat exchanger, a first expansion tank and a battery water-cooling coil; the motor integrated thermal management system comprises a second water pump, a second phase change heat exchanger, a second expansion tank, a radiator and a first motor water-cooling coil; and the refrigeration and heating cycle system of the heat pump air conditioner comprises a condenser, the heat pump air conditioner, an evaporator and a dryer. The battery integrated thermal management system and the motor integrated thermal management system are connected with the refrigeration and heating cycle system of the heat pump air conditioner through the first phase change heat exchanger and the second phase change heat exchanger. During a heating cycle, the first phase change heat exchanger and the second phase change heat exchanger transfer stored energy to the evaporator for preheating. During a refrigeration cycle, the evaporator transfers heat to the first phase change heat exchanger and the second phase change heat exchanger for storing energy. The integrated thermal management system for the electric vehicles shares the evaporator, decreases the number of evaporators and causes structure layouts inside the electric vehicles to be reasonable.

A roadbed generator provides a roadbed collector positioned within a roadbed. The roadbed collector engages passing vehicles collecting kinetic energy therefrom, which is converted to electrical energy that is collected and passed to a load for use. In one embodiment a roadbed collector is a piston positioned below a hinged surface plate that forms part of the roadbed. Passing vehicles drive the plate and piston down into a cylinder containing hydraulic fluid, driving the hydraulic fluid from the cylinder to a hydraulic generator. A return spring coupled to the surface plate force the plate back into an elevated position after a vehicle has passed on. In some embodiments an expansion tank interposed between the cylinder and generator forces fluid back into the cylinder causing the piston to move upwardly in preparation for engaging another vehicle.

An improved cooling system for a turbo charged internal combustion engine is disclosed. A conduit connects a pressurizing engine air intake to the cooling system to raise the pressure in the cooling system thereby enabling an increase of the maximum temperature which coolant in the cooling system can reach. An electronically controlled valve selectively places the expansion tank in communication with the pressurizing engine air intake to maintain a desired pressure in the tank and to prevent back flow of fluid into the engine air intake.

The invention relates to the field of engine cooling systems and aims at providing a double-loop cooling system and method for an engine. The double-loop cooling system for the engine comprises a cylinder block water jacket and a cylinder cover water jacket, and a main water pump; the cylinder cover water jacket comprises an upper cylinder cover water jacket and a lower cylinder cover water jacket, the two of which are connected with the main water pump; the double-loop cooling system for the engine further comprises an engine oil cooler connected in series with the cylinder block water jacket, a radiator connected with the main water pump, a cylinder cover thermostat connected with the upper cylinder cover water jacket and a lower cylinder cover water jacket, a cylinder block thermostat connected with the cylinder block water jacket and the radiator, an expansion tank connected with the main water pump, a first degassing valve connected with the upper cylinder cover water jacket and the expansion tank, a second degassing valve connected with the main water pump and the expansion tank, and a third degassing valve connected with the cylinder cover thermostat and the expansion tank; a water temperature sensor is arranged at an outlet of the lower cylinder cover water jacket. The double-loop cooling system for the engine is good in dynamic property, economical efficiency and discharge property of the engine, and is further capable of prolonging the service life of the engine.

The invention discloses an engine cooling system, comprising a pump (1), a heater unit (2), an oil cooler (3), an EGR cooler (4), a radiator (5), an expansion tank (6), a thermolator (7), a cylinder body water jacket (8), a cylinder head water jacket (9) and an integrated support (10), wherein, the pump (1), the oil cooler (3) and the thermolator (7) are mounted on the integrated support (10), and the thermolator (7) is a high purity wax thermolator which is arranged at a water inlet; cooling fluid entering the cylinder head water jacket (9) flows out through the back end of the cylinder head, two water outlets are arranged at two sides of the back end of the cylinder head, the water outlet at the air inlet side is connected with the radiator (5), the water outlet at the air outlet side is connected with the heater unit (2), a branch circuit of the heater unit is normally open, and the branch circuit of the heater unit is controlled by the thermolator (7). By increasing the initial operating temperature and lowering the temperature difference between the full operating temperature and the initial operating temperature, the engine cooling system of the invention can improve cooling effect, thus improving economical efficiency of engine gas fuel, and lowering discharge of harmful gases; in addition, the structural arrangement is more compact.

The invention relates to a hot water circular cushion for warming by using water vapor to push water to circularly flow for heat transmission, which comprises a hose, a cushion body, an expanding water tank, a start holding valve, tail-end holding valves, an electrical heating element and a hot water pipe. The hot water pipe is combined with the electrical heating element, and the flexible pipe is arranged in the cushion body. The hot water circular cushion for warming also comprises a vapor pipe and an exhaust connecting hose. One end of the hot water pipe is connected with one end of the vapor pipe, the other end of the vapor pipe is connected with one end of the hose, the other end of the hose is connected with one end of the exhaust connecting hose, the other end of the exhaust connecting hose is connected with one end of the expanding water tank, and the other end of the expanding water tank is connected with the other end of the hot water pipe through a connecting pipe to form a circular passage. The start holding valve is arranged on the connecting pipe, the tail-end holding valves are arranged on the optional positions of the hose and the exhaust connecting hose, and the direction of the start holding valve and the directions of the tail-end holding valves are the same. The volume in the hot water pipe is matched with the volume in the vapor pipe, and an inlet connecting hose is added between the vapor pipe and the hose. The temperature of the water entering the hose in the cushion body is not high by using the structure, and the water is very comfortable to use.

A system and method for cooling an internal combustion engine. In one embodiment of the invention a cooling system for an internal combustion engine is disclosed, comprising an engine; an intercooler for receiving combustion air from a turbocharger, the intercooler comprising an air-to-liquid heat exchanger for exchanging heat between the combustion air and a liquid coolant; an intercooler radiator; at least one engine coolant radiator; an expansion tank; an oil cooler; and at least one pump, wherein the dedicated fan is controlled by a temperature switch or controller and wherein the at least one engine coolant radiator and the intercooler radiator are located on opposite sides of the engine.

A non-metallic, diaphragm-type tank assembly for use with a pressurized water system is disclosed. The tank assembly comprising a non-metallic outer body; a non-metallic inner shell assembly, including an upper portion and a lower portion, that is contained by the non-metallic outer body; and a diaphragm that is structured and arranged about the upper and lower portions of the inner shell assembly to separate said inner shell assembly into a water portion and a pressurized gas portion. Preferably, the diaphragm comprises a resilient, non-porous material and includes a bead portion comprising an annular ring that is convex on an inner side and concave on an outer side at its outer periphery. More preferably, the bead portion is removably secured to the overlapable end portion of the lower portion of the inner shell assembly by a clamping system that comprises an inner clamp hoop and an outer band. Specifically, the outer band can be mechanically crimped to compress and secure the second overlapable end portion and the bead portion of the diaphragm between the inner clamp hoop and the outer band to provide a watertight seal for the water portion.

The invention discloses a bottom-arranged power integrated system for a high-speed internal combustion motor train unit. The bottom-arranged power integrated system for the high-speed internal combustion motor train unit comprises a diesel generating set, a diesel auxiliary system, a cooling system, an electronic control system and a mounting frame, wherein the diesel generating set comprises a diesel and a generator; the generator and the diesel are fixed through a connecting flange; the diesel auxiliary system comprises an inlet air filter, an exhaust SCR aftertreatment system, a fuel system and an engine oil system which are arranged on two sides of the diesel generating set; the cooling system comprises a fixed hydraulic pump, a cooling device, an expansion water tank and a fixed hydraulic tank; the diesel generating set and the cooling device are fixed on the mounting frame through elastic rubber dampers; and the mounting frame is hung below a floor of a vehicle through an elastic rubber damper. While axle weight of the bottom-arranged power integrated system for the high-speed internal combustion motor train unit is reduced, passenger carrying space on the vehicle can be utilized to a maximum extent,, and therefore, requirements of high speed passenger transportation are met.

An apparatus for the sterilization of lumen devices. The apparatus for sterilizing lumen devices is comprised of a chamber defining a region for sterilization, an expansion tank assembly, and a mixing member. The chamber is adapted to receive the expansion tank. The expansion tank is adapted to fluidly connect to at least one lumen device. The mixing member is disposed within the expansion tank to mix gaseous sterilant within residual gas that may include contaminants.

The invention discloses an air conditioning heat pump system provided with a cooling liquid loop for a new energy automobile. The system comprises a heat pump system and a cooling liquid loop system, wherein the heat pump system comprises an electric compressor, an external heat exchanger, a plate type heat exchanger, an internal evaporator, an internal heat exchanger, a gas-liquid separator, a first electric expansion valve, a second electric expansion valve, a normally-opened solenoid valve, a normally-closed solenoid valve, an one-way check valve and connecting pipelines; the electric compressor is correspondingly connected to the external heat exchanger and the plate type heat exchanger through the normally-opened solenoid valve and the normally-closed solenoid valve; the external heat exchanger is connected with the internal evaporator through the second electric expansion valve; the internal heat exchanger is connected with the plate type heat exchanger; the gas-liquid separator is arranged in front of the electric compressor; the cooling liquid loop system comprises a cooling liquid pump, a cooling liquid expansion water tank, a PTC electric heater and connecting pipelines; the heat pump system runs in a refrigerating mode, a heating mode and a dehumidifying mode by adjusting the normally-opened solenoid valve and the normally-closed solenoid valve to open and close.

The invention relates to an engine double-circulation cooling system with double expansion water tanks. The engine double-circulation cooling system comprises a high-temperature circulating cooling system and a low-temperature circulating cooling system, wherein the high-temperature circulating cooling system comprises the expansion water tank I, a high-temperature radiator, an engine cooling water jacket, a first water pump, an electronic thermostat, an engine oil cooling device, an electronic pressurizer and a heater; the low-temperature circulating cooling system comprises the expansion water tank II, a low-temperature radiator, a turbocharger, a second water pump, an intercooler and a BSG. According to the application, the two sets of circulating cooling systems are arranged, and the high-temperature radiator and the low-temperature radiator are respectively arranged, so that the requirements of different parts to be cooled on the cooling temperature are effectively ensured, and according to the technical scheme of the application, the sizes of the cooling systems are not enlarged.

The invention provides a pressure-stabilizing, liquid-supplementing and gas-exhausting device of a closed liquid cooling system. The pressure-stabilizing, liquid supplementing and gas-exhausting device of the closed liquid cooling system comprises an air-cooling liquid heat exchanger, a load heating element, a liquid storage tank, a liquid supplementing pump, a spiral micro bubble separator, an electric heating water tank, an expansion tank, a liquid supplying pump, electromagnetic valves, ball valves, and a stop valve. The pressure stabilization, the liquid supplement and the gas exhaust of the closed liquid cooling system are achieved by the liquid supplementing pump, the first electromagnetic valve, the second electromagnetic valve, the second ball valve, the third ball valve, the fourth ball valve, the fifth ball valve and the sixth ball valve, in association with the spiral micro bubble separator. The pressure-stabilizing, liquid-supplementing and gas-exhausting device of the closed liquid cooling system is low in cost and convenient in operation. The pressure-stabilizing, liquid-supplementing and gas-exhausting device of the closed liquid cooling system is of a great practical value.

An expansion tank which comprises a tank having a predetermined volume capacity; a flexible diaphragm in the tank, partitioning tank volume into a liquid-containing portion for holding liquid and a gas-containing portion for holding a gas under a pressure that defines a normal pressurized gas volume when the liquid-containing portion holds a predetermined liquid volume; and a proximity sensor suspended in the gas-containing portion of the tank and adapted to energize an alarm signal when volume of the gas-containing portion is reduced a predetermined amount as indicated by proximity of the diaphragm.

Method, system and program product are provided for monitoring coolant within a cooling system designed to provide system coolant to one or more electronics subsystems. The monitoring technique includes employing at least one pressure transducer to obtain multiple pressure measurements related to an amount of coolant within an expansion tank of the cooling system, and determining a rate of volume change of coolant within the expansion tank employing the multiple pressure measurements. Successive pressure measurements can be taken at a known time interval to determine the rate of volume change of coolant within the expansion tank. An automatic determination can also be made on the immediacy of action to be taken for service of the cooling system based on the rate of volume change of coolant within the expansion tank.

The invention discloses a cooling unit for a traction system. The cooling unit for the traction system comprises a bearing and supporting framework, an air filtering device, a heat radiator, an air guide cylinder, a fan box body, an expansion water tank, a water pump and a fan unit as well as a water system pipeline, an oil system pipeline, pressure sensors, temperature sensors, a wire junction box and an electric rapid connector, wherein the water system pipeline and the oil system pipeline are communicated with the heat radiator; and the pressure sensors and the temperature sensors are arranged on the pipelines. An integral matched design method is adopted for the cooling unit provided by the invention; a cooling unit of a traction transformer and a cooling unit of a traction converter are integrated into the same unit, and at the premise of simultaneously meeting the heat radiation requirements of the traction transformer and the traction converter, the cooling unit for the traction system is small in size, light in weight, low in noise, compact in structure, high in reliability, convenient to install, and low in maintaining and repairing work load.

The invention provides a residual heat removal system for a molten salt reactor buffer salt accident. The residual heat removal system for the molten salt reactor buffer salt accident system comprises a cooling tower, a main loop system and a salt filling and eliminating system, wherein a natural ventilation heat exchanger is arranged in the air cooling tower; a heater is arranged on the periphery of the natural ventilation heat exchanger; the main loop system is formed by connecting a molten salt pond, a heat tube section, the natural ventilation heat exchanger and a cooling tube section in sequence; a reactor core is arranged in the molten salt pond which is filled with molten salt; one tail ends of the heat tube section and the cooling tube section are respectively immersed in the molten salt in molten salt pond; the highest position of the heat tube section of the main loop system is connected with an expansion tank; the salt filling and eliminating system is connected with the molten salt pond directly. According the system, a passive design concept is adopted, the external power is not required, the passive elimination of the molten salt reactor residual heat under accidental working condition is realized by relaying on the natural circulation of the air and molten salt, besides, the space of the molten salt is saved by the system, and the arrangement of the other components is convenient.

A radiocactive waste containing medium is circulated within two or more systems (1,2,3) separated from each other flowtechnically; and the circulated radioactive waste is exposed to neutron radiations of different energy spectrum in each system by operating a reactor physically united entirety of irradiated sections of the said systems as a nuclear reactor or an accelerator driven subcritical system. Each system (1,2,3) has a heat exchanger (9,10) and, in given cases, a circulating pump (10,21) and an expansion tank (5,16,27). The disclosed apparatus has two or more reactor regions (1,2,3) separated from each other by partitions (37,38) and, preferably, arranged coaxially within a reactor space encircled by a common shell structure (39). A particle beam (45) produced by a particle accelerator is preferably directed into the innermost reactor region (3).

An expansion tank (28) comprising a passage (34) with a an inlet aperture (34a) for liquid replenishment of the expansion tank (28), a cover (32) which in a non-fitted state leaves the passage (34) clear and in a fitted state closes the passage (34), and a first expansion chamber (29) for receiving liquid which circulates in a first system (A). The expansion tank (28) includes a second expansion chamber (30) for receiving liquid which circulates in a second system (B) and said passage (34) divides, at a distance from the inlet aperture (34a), into a first branch (34b) which leads liquid to the first expansion chamber (29) and a second branch (34c) which leads liquid to the second expansion chamber (30).

The invention discloses a battery thermal management system for a hybrid power vehicle model. The battery thermal management system comprises an electric heater, an electronic water pump A, an electronic water pump B, a water temperature sensor A, a water temperature sensor B, a water temperature sensor C, a battery pack, a PEU, a battery cooler, an expansion water tank, a three-way valve A, a three-way valve B, a three-way valve C, a three-way valve D, a three-way magnetic valve a, a three-way magnetic valve b, a two-way magnetic valve, a hot air radiator, an engine water jacket, a refrigerant loop and a water pipe, wherein the hot air radiator is integrated into an air conditioning box, the refrigerant loop is connected with the battery cooler, and all components are connected through the water pipe. By means of the battery thermal management system, the electric heater can be shared in the battery pack and a passenger compartment; the magnetic valves are reasonably arranged in the loop, and the good logic control mode is adopted, so that the heating requirements of the battery pack and the passenger compartment are met; a heat exchange is conducted only between a circulating medium and the electric heater or the cooler; the flow path is shortened, the target temperature is reached rapidly, and the energy consumption of an electric compressor and the electric heater is saved;and the cruising mileage of a complete vehicle is increased.

The invention provides an automotive expansion tank assembly. The automotive expansion tank assembly comprises a non-pressure-withstanding chamber, a non-pressure-withstanding tank cover, a pressure-withstanding chamber, a pressure-withstanding tank cover, a siphon and a chamber connection tube, wherein the non-pressure-withstanding tank cover is matched with the non-pressure-withstanding chamber, the pressure-withstanding tank cover is matched with the pressure-withstanding chamber, and the chamber connection tube is connected with the non-pressure-withstanding chamber and the pressure-withstanding chamber; the siphon is arranged in the non-pressure-withstanding chamber and communicated with the chamber connection tube, the pressure-withstanding chamber participates in circulation of a cooling system of a whole automobile and is full of liquid all the time, and the non-pressure-withstanding chamber does not participate in circulation of the cooling system. The automotive expansion tank assembly is simple in structure, low in requirement for a manufacturing process, low in cost and light in weight.

The invention discloses a closed water boiler. The closed water boiler comprises a heating water tank; an electric heating pipe is mounted on a liner of the heating water tank; the liner of the heating water tank is synchronously communicated with a water inlet pipe and a water outlet pipe; a water inlet switch valve is arranged on the water inlet pipe; a water outlet switch valve is arranged on the water outlet pipe; the water inlet pipe between the water inlet switch valve and the heating water tank is communicated with an expansion water tank; the expansion water tank includes a shell, and a diaphragm for dividing an inner cavity of the shell; the inner cavity of the shell on one side of the diaphragm is a gas cavity; gas is filled in the gas cavity; the inner cavity of the shell on the other side of the diaphragm is a water cavity; and the water cavity is communicated with the water inlet pipe. Further, the water inlet pipe between the water inlet switch valve and the heating water tank is communicated with a safety valve; the safety valve includes a cylinder, a piston, a piston rod and a pressure relief pipe; and when the pressure suffered by the liner of the heating water tank exceeds a set value, the water pressure drives the piston to move to enable the pressure relief pipe to communicate with the liner of the heating water tank through the inner cavity of the cylinder and the water inlet pipe for pressure relief. The closed water boiler can heat boiled water with a temperature of higher than 100 DEG C, and is lower in manufacturing cost and better in safety.

An engine cooling system is provided, which comprises an engine body water jacket, a water pump, a radiator, a fan, a thermalstat, an expansion tank, a warm air machine cooler and a connection pipeline. The pipeline of the said components connects together to form a large circulating cooling passage, a small circulating cooling passage and a warm air system pipeline. The invention is characterized in that: a cut-off valve with temperature control function is positioned in the warm air system pipeline; when the engine starts and the temperature of the liquid coolant of engine is lower than the preset temperature, the cut-off valve is placed at the switch-off state. A cut-off valve with temperature control function can also be positioned in a small recycling loop; when the temperature is lower than the preset one, the cut-off valve is placed at switch-on state; when the temperature exceeds the preset one, the cut-off valve is placed at switch-off state. Because two cut-off valves with temperature control function are added, the liquid coolant does not flow through the warm air system before the temperature reaches the preset one, which reduces the heat loss and pre-heat time for the engine in this stage. Therefore, this invention can be best applied in winter or regions of harsh cold.

The invention discloses an expansion water tank. A baffle is slidably arranged inside the box, and the partition is dynamically sealed with the side wall of the box; A pressure balance device for supporting the partition is arranged between the water chamber, the partition and the bottom plate of the box. When the water storage in the water chamber decreases, the gravity of the water body in the water chamber decreases, and the water supply pressure of the expansion tank to the radiator also decreases accordingly, and the force balance between the pressure balance device and the gravity of the water body in the water chamber is broken , the pressure balance device drives the partition to move upward until the supporting force provided by the pressure balance device is equal to the gravity of the water body in the water chamber again, and the state of force balance is reached again, maintaining the distance between the water level in the water chamber and the radiator The height difference is to ensure that the water supply pressure of the expansion tank to the radiator remains constant, thereby ensuring the normal operation of the radiator and its related components.