365 results about "Four-way valve" patented technology

The invention provides a heat pump non-stop defrosting control method and system based on double-evaporator cooperative control, and the method comprises the steps: building a temperature difference response change rate index by collecting the refrigerant inlet and outlet temperatures of two groups of fin heat exchangers in real time, and recognizing a side needing to be defrosted and a heating side; an electronic expansion valve, a fan and an electromagnetic valve are dynamically configured, so that the side needing to be defrosted enters a static defrosting mode, and the heating side continuously supplies heat; the frequency rising of the compressor and the switching of the four-way valve are cooperatively adjusted, and small-flow pre-balancing is executed before reversing so as to restrain pressure impact; and after defrosting is completed, it is judged that defrosting is finished based on the thermal response state and the heat change trend, the side needing defrosting is controlled to be reset, and heating is started again. Uninterrupted heat supply of the user side in the defrosting process is achieved, water temperature fluctuation and energy consumption are remarkably reduced, and the operation stability and energy efficiency of the heat pump in the low-temperature and high-humidity environment are improved.

The invention provides an air source heat pump system. The air source heat pump system comprises a compressor, a fin heat exchanger, a shell tube heat exchanger and a gas-liquid separator, wherein the shell tube heat exchanger comprises a gas tube, a liquid tube, a heat exchange tube and a liquid separating device, the air source heat pump system further comprises a four-way valve, the four-way valve is correspondingly communication with the compressor, the gas-liquid separator, the fin heat exchanger and the gas pipe, the fin heat exchanger is in communication with the liquid separating device through a orifice plate and a first one-way valve; the fin heat exchanger is in communication with the liquid tube through an expansion valve and a second one-way valve; the first one-way valve is used for the one-way conduction of the fin heat exchanger to the liquid separating device; the second one-way valve is used for the one-way conduction of the liquid pipe to the fin heat exchanger. By the adoption of the system, a liquid storage device of the liquid refrigerant does not need to be added in the system, so that the cost is saved; a large amount of liquid refrigerant cannot flow back to the compressor after defrosting is finished; during the refrigeration mode, the refrigerant running shell pass does not need to be subjected to suction superheat, so that the air suction pressure and the operation efficiency of the refrigeration mode are improved; and the overall use valve of the system is less, and the reliability is high.

A thermal management system and method, a computer device, a vehicle and a storage medium. A four-way valve (17) can regulate the connection relationship between an electric drive circuit and a battery circuit, and a three-way valve can regulate the connection relationship between a heating apparatus, a heating circuit and the battery circuit. Therefore, said system can meet the requirement of the heating circuit selectively heating a passenger compartment and a battery (31) and the requirement of the electric drive circuit using electric drive waste heat to selectively heat the battery and the passenger compartment; and for some scenarios of vehicle use at year-round high temperatures, no heat pump system is required, thus making designed valve parts and system piping simpler, reducing the cost and resource waste of the thermal management system, and lowering the complexity of piping control.

The application discloses an air conditioner and a control method of the air conditioner. The air conditioner comprises: a heat exchange flow path for realizing heat exchange between a domestic water tank and a refrigerant circulation flow path; a control valve group arranged on the refrigerant circulation flow path and used for conducting or cutting off the refrigerant circulation flow path; and a controller connected with the control valve group and a four-way valve. The controller is configured to: acquire a target operation mode of the air conditioner, wherein the target operation mode at least comprises a heating mode, a cooling mode and a cooperative mode in which the heating mode, the cooling mode and a hot water mode are combined; determine that the target operation mode of the air conditioner is the cooperative mode; and control the opening and closing states of the control valve group and the four-way valve according to the cooperative mode, so as to control the operation of the heat exchanger group and adjust the water tank temperature of the domestic water tank. The air conditioner can meet the cooling, heating and hot water demands of users at the same time, and the waste heat generated during the refrigeration or heating is fully utilized to prepare hot water, thereby avoiding energy waste of the air conditioner during the operation.

The invention discloses a thermal management integrated assembly and whole vehicle thermal management equipment, belongs to the technical field of thermal management systems, and is designed for solving the problems that an existing thermal management system is complex in connecting pipeline structure, large in occupied space and the like. The heat management integrated assembly comprises an integrated refrigerant waterway valve plate assembly, one port of a three-way valve is connected to a water outlet connector of a heat dissipation water tank, the other port of the three-way valve is connected to a water outlet connector of a motor, and another port of the three-way valve is connected to a port A of a first four-way valve; the three-way valve, the first four-way valve, the second four-way valve and connecting pipelines between the connectors are all integrated in the integrated refrigerant waterway valve plate assembly. A battery heat exchanger; and a low-temperature heat dissipation water tank. According to the heat management integrated assembly and the whole vehicle heat management equipment, pipelines in a unit are very few, the problem that an existing heat management system is complex in connecting pipeline structure and large in occupied space is solved, the size is compact, and installation and maintenance are convenient and fast.

The rotary four-way arbitrary intercommunication valve comprises a valve body and a valve element, and the valve element extends into the valve body and is in running fit with the valve body. And the valve core is used for switching the communication between any adjacent ports and the communication between the opposite ports every time the valve core rotates by 45 degrees in the valve body through the layered flow channel structure between 0 degree and 180 degrees. The four-way valve is composed of the valve body and the valve element, switching of any two-to-two communication among the four ports is flexibly controlled by rotating the angle of the valve element, mutual communication of the ports with specific flow direction combinations is supported, the function of dynamic random communication of the four ports is achieved, the sealing performance between the valve body and the valve element is improved, and the sealing performance of the valve body and the valve element is improved. The overall structural design is compact and simple, the characteristics of layered flow channels and high sealing performance are achieved, and the leakage rate is greatly reduced. The invention further discloses a rotating method for rotating the four-way arbitrary intercommunication valve.

The utility model discloses a speed chain production line which comprises a conveying line assembly, a buffering and blocking assembly, a clamping tool assembly, an eight-station transplanting assembly and a nitrogen filling and water supplementing assembly, the conveying line assembly is used for conveying tool plates, and the buffering and blocking assembly is installed on the conveying line assembly and buffers and blocks the tool plates. The clamping tool assembly is installed on the tool plate and used for clamping and positioning a workpiece, the eight-station transplanting assembly is installed on the conveying line assembly and used for directionally transplanting the tool plate so that the workpiece can be welded, and the nitrogen charging and water supplementing assembly corresponds to the eight-station transplanting assembly and used for charging nitrogen and supplementing water into the clamping tool assembly and the workpiece. Through the structural design, the clamping precision of the four-way valve and the pipe fitting of the four-way valve can be improved, the welding quality and the welding speed between the four-way valve and the pipe fitting are improved, the situation that the welding quality is affected due to the fact that the temperature is too high in the welding process of the four-way valve is avoided, the requirement for flow line production is met, and the machining efficiency is improved.

The application discloses a kind of electric vehicle water-cooled plate performance test platform and data processing method, the test platform includes two circuits of cooling liquid circuit and refrigerant circuit, including heat pump air conditioning system, low-temperature radiator cooling system, data acquisition and control system and water-cooled plate test bench, heat pump air conditioning system includes compressor, condensing / evaporating radiator, four-way valve, electronic expansion valve and plate heat exchanger, and heating and refrigeration are realized by four-way valve Switching;Low-temperature radiator cooling system includes water-cooled radiator, three-way valve and liquid storage tank, water-cooled radiator, three-way valve and liquid storage tank are connected to form cooling liquid circuit and refrigerant circuit is exchanged with cooling liquid circuit by plate heat exchanger, and the performance experiment of low-temperature radiator to water-cooled plate test platform can be realized.This application can simulate the actual operating performance of water-cooled plate on real electric vehicle, can test the heat dissipation and heating capacity of water-cooled plate, and can determine the pressure drop or flow resistance under different flow and different temperature.

Disclosed are a method and device for controlling an air conditioner. The air conditioner includes an outdoor heat exchanger, an indoor heat exchanger, a heat storage heat exchanger, a compressor, a four-way valve assembly, and a throttling assembly, wherein the outdoor heat exchanger is connected to the indoor heat exchanger by means of a first pipeline and a bypass, the outdoor heat exchanger is connected to the compressor by means of a second pipeline, the indoor heat exchanger is connected to the compressor by means of a third pipeline, the heat storage heat exchanger is arranged on the bypass, the throttling assembly is arranged on the bypass, the four-way valve assembly includes a first four-way valve and a second four-way valve, the first four-way valve is arranged on the second pipeline, and the second four-way valve is arranged on the third pipeline.

The utility model relates to an auxiliary mounting vehicle for a four-way valve, which belongs to the technical field of water supply mounting equipment and particularly comprises traveling wheels mounted at the bottom of a movable frame, an equipment box mounted on the movable frame, a hydraulic control valve mounted on the equipment box, a hydraulic oil tank and an oil pump arranged in the equipment box, and a guide post component mounted at the front end of the movable frame. A guide column assembly is installed on the movable frame, a sliding seat is installed on the guide column assembly, a hydraulic lifting mechanism used for controlling the sliding seat to ascend and descend is installed on the movable frame, two right-angle supporting frames are installed at the front end of the sliding seat through a hydraulic transverse moving mechanism, and the two right-angle supporting frames are used for supporting and clamping a four-way valve. The mounting speed can be effectively increased, and the labor intensity is reduced.

The invention relates to the technical field of air source heat pump steam engines, in particular to an efficient and environment-friendly air source heat pump steam engine and application of the efficient and environment-friendly air source heat pump steam engine. A steam outlet of a gradient type liquid separation evaporator communicates with a gas-liquid separation tank and a first steam inlet of an inverter compressor through a four-way valve, and a monitoring assembly is arranged between the inverter compressor and the four-way valve; the variable-frequency compressor is communicated with the double-flow-channel condenser, the double-flow-channel condenser is communicated with the liquid storage device, the liquid storage device is communicated with the flash tank type economizer through the two-stage throttling assembly, the top of the flash tank type economizer is communicated with a steam supplementing opening of the variable-frequency compressor, and the flash tank type economizer is communicated with the gradient type liquid separation evaporator through the two-stage throttling assembly. The gradient type liquid separation evaporator is provided with a low-temperature auxiliary assembly. By the adoption of the structure, air serves as a heat source, zero pollutant emission is achieved, the frequency of the inverter compressor is dynamically adjusted according to loads, high efficiency and energy saving are achieved, the operation cost is reduced, and requirements of multiple fields such as textile printing and dyeing, food processing, chemical and medicine and agricultural greenhouse heating are met.

The present application relates to the field of new energy vehicle thermal management technology, especially to an integrated thermal management module and a vehicle. The integrated thermal management module comprises: a flow channel for conveying coolant is formed inside a flow dividing member; a power assembly is used to provide power for the coolant flowing in the flow channel; a switching assembly is in communication with the flow channel and comprises a first four-way valve and a second four-way valve; a warm air core inlet, a heat exchanger inlet, a heat exchanger outlet, an electric drive system inlet, an electric drive system outlet, a radiator inlet, a radiator outlet, a heater inlet, a heater outlet, a battery water pump inlet and a battery outlet are arranged on the side wall of the flow dividing member and are in communication with the flow channel. The present application has the advantages of simple structure, small size and easy installation, thereby reducing the weight of the whole vehicle, reducing the parts of the whole vehicle, reducing the cost, reducing the pressure loss of the whole vehicle system, improving the thermal efficiency of the thermal management system, making the vehicle energy-saving and comfortable, and improving the cruising range.

This invention provides an automated filling device integrating extinguishing agent and high-pressure gas filling functions, relating to the field of fire extinguishing device manufacturing, and particularly to a filling device and method for extinguishing agents and high-pressure gas. The device includes a ball screw stepper motor, a liquid collection chamber, a four-way valve, an operating lever, one-way valve 1, one-way valve 2, and one-way valve 3. The filling device uses a ball screw stepper motor to drive a liquid-pushing piston, controlling the filling amount of extinguishing agent by precisely controlling the piston stroke. The "operating lever + piston groove" design of the filling device integrates the pre-installation, positioning, and final tightening of the seals within the device. The filling device integrates the three key steps of extinguishing agent filling, high-pressure gas pressurization, and bottle mouth seal installation into one device, and achieves function switching through a core component, the four-way valve.

The utility model discloses an electric compressor and heat management system based on PTC preheating belongs to heat pump air conditioning technical field, an electric compressor based on PTC preheating, including compressor main part, controller, four -way valve and PTC heater, PTC heater detachable installation at the tail end of compressor main part, and four -way valve is coupled with compressor main part and PTC heater through pipeline and is connected, and integrated integrated compressor pipeline module, four -way valve left side surface is opened a pair of interface end, is used for connecting PTC heater export and PTC heater import respectively, four -way valve front side surface is opened a pair of interface end, is used for connecting compressor main part air inlet and evaporator export respectively, four -way valve top is equipped with the valve core, and the valve core slides in four -way valve inside vertical direction, is used for controlling four -way valve inside fluid passage's switching, and PTC heater is connected with controller wireless signal, is used for controlling the temperature of refrigerant after heating by PTC heater, reaches the purpose of preheating for compressor main part.

This invention relates to the field of refrigeration and heating technology, and discloses a heat pump system. The heat pump system includes a compressor, a first four-way valve, a shell-and-tube heat exchanger, an evaporator, a first pipeline, a second pipeline, and a control valve. The shell-and-tube heat exchanger has a first heat exchange flow path, a second heat exchange flow path, and a cooling water flow path. The first and second heat exchange flow paths exchange heat with the cooling water flow path within the shell-and-tube heat exchanger. The heat pump system can selectively connect the first and second pipelines via the first and / or second heat exchange flow paths through the control valve. Compared to existing technologies, the heat pump system of this invention can adjust the heat exchange area between the refrigerant in the first and second pipelines and the cooling medium within the shell-and-tube heat exchanger according to ambient temperature and user needs, thereby improving heat exchange efficiency and rationally controlling the energy consumption of the heat pump system.

The invention relates to a rapid outburst elimination system for cross-cut coal uncovering. The rapid outburst elimination system comprises an extraction pipe, an injection pipe and an ultrasonic transducer which are arranged in a drill hole. The outer end of the injection pipe is connected with a gas injection stop valve, a pressure pump, a heater and a carbon dioxide storage tank through an injection pipeline, a four-way valve is arranged on the injection pipeline between the injection pipe and the gas injection stop valve, and the four-way valve is connected with a temperature sensor and a gas injection pressure gauge; the outer end of the extraction pipe is connected with a heat exchanger, a gas separation tower, a pressure adjusting device and an extract separation tower through an extraction pipeline; the upper end of the extract separation tower is connected with a carbon dioxide storage tank through a circulating pipeline; and the outer end of the ultrasonic transducer is electrically connected with the ultrasonic generator. According to the ultrasonic-assisted supercritical carbon dioxide cyclic extraction anti-reflection technology, organic matters in the coal seam can be extracted through supercritical carbon dioxide, so that the permeability of the coal seam is improved, and the technology is reasonable in structure, simple in device, convenient to implement, safe and reliable.

This invention relates to a four-way valve with multi-channel independent control and its operating method. The valve seat of the four-way valve includes an upper cover and a lower cover, and has a valve cavity and a flow channel inside. The upper cover has a water inlet. The valve core assembly includes a valve core, a sealing ring A, and a sealing ring B. The valve core is axially slidably disposed in the valve cavity, with one end of the valve core extending out of the lower cover as the driving end. The other end of the valve core is pressed against a return spring between itself and the inner end of the valve cavity of the upper cover. The valve cavity is divided into an inlet chamber and an outlet chamber. The inlet chamber communicates with the flow channel, and the outlet chamber has a radially arranged outlet. A water passage gap is formed between the valve core and the outlet. Sealing ring A seals the gap between the driving end of the valve core and the lower cover. Sealing ring B, under the pressure of the return spring, seals and isolates the outlet chamber from the inlet chamber. The operating method is as follows: when the extended end of the valve core is pressed, compressing the return spring, sealing ring B releases the above-mentioned sealing isolation, and the inlet and outlet communicate. The above structure realizes one inlet and multiple outlets, with independent control of each channel, meeting the needs of independent output of multiple fluids.

The utility model relates to the technical field of hoisting tools for refrigerating system valves, and particularly provides a hoisting device, a four-way valve assembly and an adjusting system.The hoisting device comprises a hoisting base and a valve body supporting part used for supporting a valve body; the hoisting fixing plate comprises a connecting pipe supporting plate, the connecting pipe supporting plate extends in the horizontal direction, the connecting pipe supporting plate can support at least one of the E connecting pipe, the S connecting pipe and the C connecting pipe, the position, connected to the hoisting base, of the hoisting fixing plate is adjustable in the height direction of the hoisting base, and the hoisting fixing plate and the hoisting base are detachably and fixedly connected. When the four-way valve is installed, the four-way valve can be adjusted to the preset installation angle, then the connecting pipe supporting plate is adjusted to support at least one of the E connecting pipe, the S connecting pipe and the C connecting pipe, the supporting effect on the four-way valve is achieved, then the four-way valve is fixed to the hoisting device, and it is ensured that the four-way valve is stably located at the preset installation position; the problem that a four-way valve cannot be connected with a system is solved.

This invention discloses an intelligent interlocking and audible-visual early warning system for cantilever tunneling machines based on sensor fusion. This invention relates to the field of safety technology for mining tunneling equipment, solving the technical problem that existing mining tunneling equipment often uses manual three-way ball valves for hydraulic interlocking to switch oil circuits. This invention uses a three-position four-way valve in conjunction with various hydraulic valves to achieve forced hydraulic interlocking of the three major operating oil circuits: tunneling, anchor cable tensioning, and support. Only one operating circuit is energized at a time, completely avoiding the problem of simultaneous malfunction of multiple mechanisms caused by accidental operation of the control handle or failure to lock the hydraulic circuit, effectively reducing equipment collision damage and personnel safety hazards. By using pressure sensors to collect oil circuit load pressure signals in real time, it achieves audible-visual and voice early warning, emergency stop interlocking for cutting motor power failure, and intelligent on / off control of electronic fences. This not only warns on-site workers to stay away from dangerous areas in advance but also eliminates the risk of accidental start-up of the cutting motor during support and anchor cable operations.

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

The application relates to an air conditioning unit which comprises a compressor, a heat exchanger assembly, a four-way valve and a controller, the controller being connected with the compressor, the four-way valve, a suction pressure sensor and a discharge pressure sensor, when the discharge pressure Pd and the suction pressure Ps satisfy Pd P1 and Pd-Ps

The application relates to the technical field of metal forging forming, and discloses an asymmetric four-way valve body forging forming die, which comprises a lower mounting plate and an upper mounting plate, a lower die is fixedly connected to the upper end of the lower mounting plate through bolts, a discharging cavity is arranged in the lower die, a shunt conical column is arranged at the eccentric bottom end in the discharging cavity, four shunt grooves arranged in a rectangular array are arranged on the outer wall of the discharging cavity, an upper die is fixedly connected to the bottom end of the upper mounting plate, a pushing column is fixedly connected to the upper die, and a conical groove is fixedly connected to the bottom end of the pushing column. The asymmetric four-way valve body forging forming die can forge metal materials into four asymmetric branch pipes required by a four-way valve body through a forging forming process. The design of the discharging cavity, the shunt conical column and the shunt grooves enables metal materials to asymmetrically flow according to requirements in the forging process, the materials required by the four asymmetric shunt branch pipes are met, the distribution of the materials is optimized, and material waste is reduced.

An integrated architecture system for dual-indirect heat pump thermal management in pure electric vehicles based on R290. Currently, most pure electric vehicles have low integration levels in their thermal management systems. Typically, the battery pack circuit and air conditioning circuit are connected in parallel through a heat exchanger, while the motor and electronic control cooling circuit is an independent circuit. This results in too many system components, occupying a large amount of engine compartment space, and lacking a standardized and precise processing structure. In this invention, one end of the radiator is connected to the second refrigeration device, and a first valve body is provided between the radiator and the second four-way valve. The other end of the radiator is a double-ended connection end, which is sequentially connected to one end of the second refrigeration device through the fourth inlet / outlet and the second inlet / outlet of the second four-way valve. A third valve body is provided between the double-ended connection end of the radiator and the second four-way valve. The other end of the second refrigeration device is connected to the first inlet / outlet of the second four-way valve. The double-ended connection end of the radiator is sequentially connected to the fourth inlet / outlet of the second four-way valve through a drive motor, an electronic control unit, and a second water pump.

The invention provides a four-way valve assembly machining method which comprises the following steps that a four-way valve and an aluminum pipe are provided, and the four-way valve is provided with an aluminum connecting part; the four-way valve and the aluminum piping are assembled; one end of the aluminum piping is connected with the aluminum connecting part in a matched mode; and the four-way valve and the aluminum piping which are assembled are welded and fixed through flame brazing or high-frequency welding. The four-way valve is provided with an aluminum connecting part, so that welding connection of the four-way valve and the aluminum piping is facilitated.

The present disclosure belongs to the technical field of heat pump system, in particular to a double-cold-source integrated air source heat pump roof unit and a control method thereof. The unit comprises a refrigerant circulation loop, wherein a compressor, a water-cooled condenser, an air handling unit and at least two groups of parallel finned coil units are arranged. The unit can realize independent defrosting of a single finned coil in cooling, heating and heating modes by controlling the opening and closing and on-off of valves. The unit integrates water-cooled refrigeration, air source heat pump heating and independent defrosting of components. In the cooling mode, the water-cooled condensing method is used to greatly reduce the condensing temperature, and the evaporator refrigerant vapor does not need to pass through a four-way valve, thereby reducing the suction pipe pressure drop and improving the refrigeration energy efficiency. In the heating and defrosting process, the indoor heating is not interrupted. The unit has high integration degree, low operation cost, high reliability, high system comprehensive energy efficiency ratio, energy saving and environmental protection.

The utility model discloses a low-pressure air inlet forced adsorption type hydrogen drying device and a hydrogen drying system, the hydrogen drying device comprises a first dryer and a second dryer which are arranged in parallel, and air blowers are respectively arranged on air inlet pipelines of the first dryer and the second dryer; a first dryer air inlet pipe connector of the first four-way valve and a second dryer air inlet pipe connector of the first four-way valve are connected with air inlet pipelines of the first dryer and the second dryer respectively. A first dryer air outlet pipe connector and a second dryer air outlet pipe connector of the second four-way valve are respectively connected with air outlet pipelines of the first dryer and the second dryer; the regeneration cooler and the gas-water separator are connected in series, a cooler inlet of the regeneration cooler is connected with a cooler connector of the second four-way valve through a pipeline, and a gas outlet of the gas-water separator is connected with a separator connector of the first four-way valve through a pipeline. And low-pressure hydrogen can be dried.

The embodiment of the application discloses a kind of oil return control method, device, temperature control equipment and storage medium of double cold source unit, double cold source unit includes compressor, four-way valve, shell and tube heat exchanger, fin heat exchanger, evaporative condenser, double cold source switching valve and the heating defrosting electromagnetic valve of setting on fin heat exchanger refrigerant outflow pipeline;Double cold source unit includes refrigeration mode and heating mode;The oil return control method of double cold source unit includes: in refrigeration mode, periodically control heating defrosting electromagnetic valve to open, to make the lubricating oil accumulated in fin heat exchanger with refrigerant flow back to the refrigeration cycle of unit.The technical scheme of the embodiment of the application can periodically bring back the lubricating oil remaining in fin heat exchanger to refrigeration cycle, solve the oil leakage problem in the refrigeration process of double cold source unit, make unit operation more stable, improve the reliability and service life of unit.

The utility model belongs to the technical field of cold and hot water units, and discloses a four-way valve cold and hot machine which comprises an outer box body, an upper cover is fixedly installed at the upper end of the outer box body through bolts, a main machine and an evaporator are fixedly installed in the outer box body, and a liquid inlet pipe and a liquid outlet pipe are installed on the side surface of the main machine. A mounting plate is fixedly arranged on the surface of the outer side of the main machine, a non-return mechanism is arranged on the upper surface of the mounting plate, and by preventing hot air from flowing back and communicating, heat loss is reduced, so that energy efficiency is improved, and efficiency is improved. According to the four-way valve cooling and heating machine, a linkage structure of the switching disc, the flow guide groove and the one-way valves is integrated in the non-return mechanism, accurate non-return and energy efficiency improvement are achieved through switching of the one-way valves with different damping characteristics, and dual protection of mechanical damping non-return and electric control path cut-off is formed in cooperation with on-off control over a liquid outlet path through an electromagnetic valve; and hot air is thoroughly prevented from flowing back and communicating through a gap between the four-way valve and the non-return box.

The invention provides a whole vehicle thermal management system and method for a distributed electric drive vehicle, and relates to the technical field of whole vehicle thermal management. Comprising a first air bag liquid storage device, a front-end radiator, a first filter, a front-end evaporative condenser, a first liquid pump, a first three-way valve, a first four-way valve, a second three-way valve, a second air bag liquid storage device, a second filter, a second liquid pump, a first expansion valve, a passenger compartment evaporative condenser, a third four-way valve, a four-way reversing valve, an electric compressor, a liquid storage tank and a fourth four-way valve. A second expansion valve, a fourth three-way valve, a second heat exchanger, a second four-way valve, a first heat exchanger and a third three-way valve; the whole vehicle heat management system of the distributed electric drive vehicle comprises a motor cooling mode, an air conditioner refrigeration mode, a high-temperature battery refrigeration mode, a motor waste heat recovery mode and an air conditioner heating mode. The temperature of all parts can be precisely controlled, waste heat is efficiently recycled, energy is saved, operation is stable, and the safety and economical efficiency of thermal management of the whole vehicle are greatly improved.

The invention provides a high-strength hydrogen sulfide stress corrosion resistant four-way valve body and a manufacturing method thereof, and relates to the field of alloy steel, the four-way valve body is prepared by respectively boring geometric center lines in the length direction and the height direction before hardening and tempering of a solid valve body; steel used by the solid valve body comprises the following elements in percentage by mass: 0.26%-0.33% of C, 0.15%-0.35% of Si, 0.4%-0.9% of Mn, less than or equal to 0.008% of P, less than or equal to 0.004% of S, 1.4%-2.0% of Cr, less than or equal to 0.3% of Ni, 0.6%-1.2% of Mo, less than or equal to 0.3% of Cu, 0.015%-0.035% of Al and the balance of Fe and inevitable impurity elements. According to the four-way valve body produced through the manufacturing method, the yield strength Rp0.2 is larger than or equal to 90 KSI at the same time, and when a hydrogen sulfide stress corrosion resistance test is carried out, when the pre-stress is 80% of the yield strength, the valve body does not break after the test time is longer than 720 hours.