328 results about "Intermediate heat exchanger" patented technology

The invention discloses a server liquid cooling cabinet group heat dissipation system with phase change energy storage, which comprises two linear array type server liquid cooling cabinet groups, two cooling capacity distribution units, two heat pipe air conditioner all-in-one machines, a multi-channel cold liquid distributor, a multi-channel hot liquid backflow device and the like, the all-in-one machine comprises a heat pipe natural cold source refrigerating loop and a compressor mechanical refrigerating loop, the two refrigerating loops independently or jointly provide an outdoor cold source, heat of all the liquid cooling cabinets is transmitted to the all-in-one machine in the cold capacity distribution unit, and therefore the heat is transmitted out of the machine room. A phase change energy storage flow channel is preferably arranged on the primary side of the intermediate heat exchanger in parallel, cold storage and buffering are achieved by switching a channel, a cold storage and cold release intelligent control strategy based on a lag temperature difference threshold value is constructed, a main cold source linkage and cold source switching smooth transition mechanism is achieved, the thermal stability, operation continuity and response capacity of the system are improved, and the system reliability is improved. The liquid cooling heat dissipation device is suitable for data center liquid cooling heat dissipation scenes with high heat density, high energy efficiency and high reliability requirements.

The invention discloses an oil return control method and system of a cascade heat pump system, and the control method comprises the following steps: 1, detecting a first state parameter of an intermediate heat exchanger so as to adjust a compressor and a throttling device at a low-temperature side and a high-temperature side, and when a second state parameter at the low-temperature side meets a condition, adjusting the compressor and the throttling device at the high-temperature side; the operation frequency of the compressor on the low-temperature side / high-temperature side is adjusted again, and return oil flushing is conducted on the intermediate heat exchanger; the second method comprises the following steps: respectively calculating the accumulated carbonization time of the corresponding lubricating oil in the low-temperature side or the high-temperature side, and judging whether the lubricating oil is replaced or not based on the accumulated carbonization time; and the third method comprises the steps that the accumulated low-frequency operation duration of the compressor on the low-temperature side or the high-temperature side in the low-frequency state is detected, and when the triggering condition is met, the operation frequency of the compressor is increased. Based on the control method, the operation reliability and the energy efficiency performance of the cascade heat pump system are improved, and the service life of equipment is prolonged.

The utility model provides a vehicle battery pack cooling system and a vehicle. The vehicle battery pack cooling system comprises a compressor, a refrigerant cooling device, an intermediate heat exchanger, a refrigerant expansion device, a gas-liquid separation device and a cooling plate, the middle heat exchanger is internally provided with a high-temperature runner and a low-temperature runner which are used for circulating refrigerants, the refrigerants in the high-temperature runner and the low-temperature runner can exchange heat, the cooling plate is internally provided with a cooling runner which is used for circulating the refrigerants, and the refrigerants in the cooling runner can directly exchange heat with the battery pack; the compressor, the refrigerant cooling device, the high-temperature flow channel, the refrigerant expansion device, the gas-liquid separation device and the cooling plate are sequentially communicated to form a refrigerant liquid inlet loop, and the cooling plate, the low-temperature flow channel and the compressor are sequentially communicated to form a refrigerant liquid return loop. According to the vehicle battery pack cooling system, the cooling efficiency of the battery pack can be improved, and the working stability of the battery pack can be improved.

The utility model relates to the technical field of refrigeration systems, and specifically to a phase-change cold plate temperature control system with air-liquid fusion, including an indoor heat exchanger, an outdoor heat exchanger, an intermediate heat exchanger, a four-way valve, a compressor, a driving pump, a liquid collecting main pipe, a gas collecting main pipe, and a plurality of cooling branches; the intermediate heat exchanger includes a first channel and a second channel; the first channel is arranged between the other end of the outdoor heat exchanger and one end of the indoor heat exchanger; a first solenoid valve is arranged between the first channel and the other end of the outdoor heat exchanger; the second channel, the driving pump, the liquid collecting main pipe, the cooling branch, and the gas collecting main pipe are connected end to end in sequence. The utility model can make the refrigerant of the cooling plate in the cold plate assembly in the gas-liquid two-phase state as much as possible under the refrigeration state; and it can also heat the indoor air temperature in winter to keep the battery temperature within a reasonable range.

The invention discloses a cascade type high-temperature heat pump system two-stage compression cooperative control method which comprises the following steps that a cascade type heat pump system composed of a low-temperature-stage compression cycle and a high-temperature-stage compression cycle is constructed, and the two stages of cycles are coupled through an intermediate heat exchanger; a variable-frequency compressor is arranged in the low-temperature-stage compression cycle, and a fixed-frequency compressor and an air supplementing and enthalpy increasing device are arranged in the high-temperature-stage compression cycle; dynamically adjusting the strategy; intermediate heat exchanger temperature difference feedback control; a hierarchical start-stop control strategy; fault redundancy control and safety protection are carried out; and optimizing a refrigerant working medium and calculating the charge quantity. The variable frequency compressor is introduced into the low-temperature-stage compression cycle, the frequency of the variable frequency compressor is dynamically adjusted based on system operation working condition parameters, and meanwhile, the system can adjust the operation state in real time according to the environment temperature, the load requirement and the like in combination with opening state optimization of the high-temperature-stage air supply enthalpy increasing device, power consumption waste is effectively reduced, and the energy utilization efficiency is improved.

The invention relates to the technical field of sample storage, particularly provides a cascade refrigeration system and a control method of an ultralow-temperature sample library, and aims to solve the problem that normal operation of a unit is affected due to abnormal oil return of an existing cascade refrigeration system. In order to achieve the purpose, the cascade refrigeration system comprises a high-temperature-stage refrigeration unit, a low-temperature-stage refrigeration unit and an intermediate heat exchanger, the low-temperature-stage refrigeration unit comprises a low-temperature compressor, an oil separation device and a heat exchange device, the oil separation device comprises a plurality of oil separators arranged in sequence, and a heat exchanger is arranged between every two adjacent oil separators; the low-temperature compressor, the oil separation device, the intermediate heat exchanger and the heat exchange device are communicated with one another to form a low-temperature-stage refrigerant circulation loop, and the high-temperature-stage refrigeration unit and the intermediate heat exchanger are communicated with one another to form a high-temperature-stage refrigerant circulation loop. The oil separation efficiency can be improved, deep oil removal is achieved, and oil return is remarkably improved.

The utility model discloses a double-flue structure matched with a secondary aluminum double-chamber furnace. Belongs to the technical field of metal casting machining auxiliary devices. The front furnace and the rear furnace are provided with a low-temperature flue and a high-temperature flue; the tail end of the low-temperature flue passes through the low-temperature heat exchanger and then is connected to the bag-type dust The tail end of the high-temperature flue passes through the high-temperature heat exchanger and then is connected to the desulfurization and denitrification tower; cooling liquid is supplied to the low-temperature heat exchanger and the high-temperature heat exchanger by a cooling liquid supply device; the high-temperature flue is connected to the intermediate heat exchanger through a branch pipe with a first electric control valve before being connected to the high-temperature heat exchanger; the discharging end of the intermediate heat exchanger is communicated with the discharging end of the high-temperature heat exchanger, and cooling liquid of the intermediate heat exchanger is provided by cooling liquid subjected to heat exchange in the low-temperature heat exchanger; according to the utility model, the problems that a reliable flue gas emission system for the secondary aluminum double-chamber furnace is lacked at present and the flue gas temperature is difficult to effectively control are effectively solved.

The invention discloses a gradient utilization system based on low-grade heat energy and LNG cold energy, the gradient utilization system based on low-grade heat energy and LNG cold energy comprises a cold energy power generation device and a light hydrocarbon separation system which are communicated with each other, the light hydrocarbon separation system is used for recycling and separating C2 + light hydrocarbon in LNG rich liquor to obtain ethane, LPG and LNG barren liquor respectively, and the LNG barren liquor is used for storing the ethane, the LPG and the LNG barren liquor. The cold energy power generation device carries out cold energy power generation based on ethane and LNG barren liquor obtained by the light hydrocarbon separation system as cold sources. The cold energy power generation device comprises a first circulation pipeline, a second circulation pipeline, a third circulation pipeline and an intermediate heat exchanger. And low-grade heat energy circulates in the intermediate heat exchanger and the third circulating pipeline. The low-grade heat energy is utilized, coupling of the light hydrocarbon separation system and the cold energy power generation device is achieved, the cooling capacity of LNG barren liquor and ethane is fully utilized, external cooling capacity supply is not needed, comprehensive utilization of the low-grade heat energy and LNG cold energy is achieved, and the cold energy utilization rate is effectively increased.

The invention provides an energy-saving system for continuously boiling a brewery boiler by adding air source heat energy. The energy-saving system comprises the boiler, a condensing heat exchanger, an air energy heat supply device, an intermediate heat exchanger, an energy storage tank, a preheater and temperature values among the devices. The energy storage tank can store heat of the air energy heat supply device and heat of steam waste heat after boiling of the boiler, and can supply heat supplement for continuous boiling of the boiler through the stored energy. Air source heat and recovered steam heat energy of the boiling device are used for supplementing heat for wort, so that the steam consumption of an external pipe network can be reduced, steam loss is reduced, heat circulation and repeated utilization of the system are realized, the heat energy utilization rate is improved, the energy-saving effect is achieved, the wort temperature rising time is shortened, and the working efficiency is improved. Furthermore, the wort boiling time of the boiler is shortened, and the production efficiency is improved.

The invention belongs to the technical field of nuclear power, and particularly relates to a nuclear power generation steam supply system and a using method thereof. The nuclear energy power generation steam supply system comprises a sodium-cooled fast reactor, an intermediate heat exchanger, a secondary loop sodium pump, a sodium-fused salt heat exchanger, a low-temperature fused salt conveying pump, a first adjusting valve, a low-temperature fused salt tank, a high-temperature fused salt tank, a second adjusting valve, a high-temperature fused salt conveying pump, a fused salt-water heat exchanger, a steam loop control valve, a power generation loop control valve, a superheater and a main water feeding pump. The invention discloses a steam turbine generator, a check valve and a condenser. By adopting a sodium-sodium-fused salt-water four-loop design, the problems that the possibility of sodium-water reaction is not eliminated and peak regulation and frequency modulation capabilities are not achieved due to the fact that an existing fast reactor adopts a sodium-sodium-water three-loop design are solved.

The invention discloses a cascade refrigeration system flow control method and device, refrigeration equipment and a medium, a cascade refrigeration system comprises a low-temperature-stage compressor, a high-temperature-stage compressor, an intermediate heat exchanger, a temperature sensor, a condensation fan and a cooling rate sensor, and the temperature sensor is arranged in the intermediate heat exchanger. The real-time temperature monitored by the temperature sensor is synchronously obtained, and the operation duration of the low-temperature-stage compressor is recorded; the operation state of the low-temperature-stage compressor is judged according to the real-time temperature and the operation duration; and if the low-temperature compressor is in the low-flow operation state, a low-flow response mode is started. The flow condition of the low-temperature compressor during starting is judged according to the temperature detected by the temperature sensor and the calculated instantaneous cooling rate, and flow control is performed according to the instantaneous cooling rate, so that the problems of low refrigerant flow and slow cooling rate caused by liquid accumulation in the intermediate heat exchanger during starting of the low-temperature compressor are solved.

The invention relates to the technical field of new energy automobile heat management, and belongs to a variable heat return quantity heat management system based on a new energy automobile R290 refrigerant, which can realize the functions of a refrigeration mode, a heat pump heating mode, a hot gas bypass mode and the like. The intermediate heat exchanger is used as a forced supercooling section and a heat regenerator of a water-cooling condenser in a refrigeration mode, and is used as an economizer in a heating mode; through the bypass ERV + EXV throttling mode, the refrigerant flow passing through the intermediate heat exchanger can be dynamically adjusted according to different compressor rotating speeds and suction superheat degrees, and the problem that the suction superheat degree is large when the intermediate heat exchanger is matched with different refrigerant flows is solved. The air suction superheat degree can be accurately adjusted, the COP is improved compared with a traditional system, and meanwhile the reliability of the compressor is guaranteed.

The invention discloses an adsorption type refrigeration development data center waste heat recovery system, and relates to the technical field of waste heat recovery, the adsorption type refrigeration development data center waste heat recovery system comprises a plurality of liquid cooling racks, and each liquid cooling rack is provided with a server and a water-cooling cold plate on a central processing unit; the at least one rack water heat exchanger is used for transferring heat collected from the liquid cooling rack to inlet water of a building cooling system; an intermediate heat exchanger for partially recovering heat discharged by the liquid cooling rack; the steam compression cooling machines are used for providing cooling water for the inter-row cooling units; and the adsorption type cooling machine is used for driving a refrigeration process by utilizing waste heat discharged by the liquid cooling rack and generating cooling water to be supplied to the inter-row cooling unit. By introducing the adsorption type refrigeration technology, waste heat of the data center can be used for driving the refrigeration process, so that extra cooling capacity is generated, consumption of external energy is reduced, and the overall energy utilization efficiency of the data center can be improved.

The utility model discloses a cold hydrogenation synthesis device which comprises a gas-liquid separation tank and a crude TCS condenser, the gas-liquid separation tank is used for separating non-condensable gas and chlorosilane, the chlorosilane refers to silicon tetrachloride, silicon trichloride and dichlorosilane, an intermediate heat exchanger is arranged between the gas-liquid separation tank and the crude TCS condenser, and the intermediate heat exchanger is used for heating the crude TCS condenser. Liquid flowing out of the gas-liquid separation tank and gas vaporized by the coarse TCS condenser are suitable for heat exchange in the intermediate heat exchanger. According to the cold hydrogenation synthesis device, through the arrangement of the intermediate heat exchanger, the cooling capacity of the liquid phase of the gas-liquid separation tank in a conventional process is utilized, the utilization effect of energy in the process is improved, the condensation effect of chlorosilane is improved, and maximum utilization of resources is achieved.

The invention relates to the technical field of heat pump systems, in particular to a heat pump intermediate heat exchanger air supply system and a control method thereof.A REFPROP function is introduced according to the evaporation pressure, the condensation pressure, the compressor frequency, the refrigerating capacity and other parameters of operation of a heat pump unit to obtain all state parameters of the whole two-stage compression process of a unit compressor, such as the primary compression end pressure and the enthalpy value; and according to the deviation value range of the optimal intermediate pressure ratio of the compressor and the air supply ratio of the main path circulation, the air supply amount of the main path circulation of the heat pump unit is determined. By adjusting the opening degree of the auxiliary path electronic expansion valve, the auxiliary path outlet pressure value of the unit is close to the optimal middle pressure of the compressor. By means of air supply control, it is guaranteed that in the operation process of the unit, the opening degree of the auxiliary electronic expansion valve can be controlled according to the calculated deviation value of the air supply ratio of the heat pump system and the intermediate pressure ratio of the compressor, the air supply pressure of the unit is the optimal intermediate pressure, and therefore the optimal heating performance of the unit is achieved.

An air conditioner (100) comprises: an outdoor machine (40); a plurality of branch units (10a, 10b, 10c); a plurality of indoor machines (50a, 50b, 50c); an outgoing main pipe (61) and a return main pipe (62), through which the outdoor machine (40) and the plurality of branch units (10a, 10b, 10c) are connected; a plurality of outgoing branch pipes (51a, 51b, 51c); and a plurality of return branch pipes (52a, 52b, 52c). An intermediate heat exchanger (43) is configured to perform heat exchange between a refrigerant flowing through a first refrigerant pipe path (R1) and a heat medium flowing through a first heat medium circulation path (C1).

The utility model relates to the technical field of energy conservation of air source heat pumps, in particular to a cascade type air source heat pump straight-out steam unit. The unit comprises a low-temperature-stage heat pump system circulation assembly, a high-temperature-stage heat pump system circulation assembly and a steam system assembly. The low-temperature-stage heat pump system circulation assembly comprises a low-temperature gas-liquid separator, a low-temperature-stage compressor, a heat release pipe of the intermediate heat exchanger, a low-temperature liquid storage tank, a low-temperature throttling element and an air heat exchanger. The high-temperature-stage heat pump system circulation assembly comprises a high-temperature gas-liquid separator, a high-temperature-stage compressor, a high-temperature water heat exchanger, a high-temperature liquid storage tank, a high-temperature throttling element and a heat absorption pipe of an intermediate heat exchanger. The steam system assembly comprises a steam-liquid separator, a constant-pressure make-up pump, a circulating pump, an electric control valve, a steam outlet flow meter, a flow control valve and a one-way valve. By optimizing the structure of the unit, the effects of directly discharging steam and stably discharging steam can be achieved.

The invention discloses an experimental platform for capturing and recycling carbon dioxide in ship tail gas. The experimental platform comprises an absorption tower, a desorption tower, an intermediate heat exchanger and a reboiler, a rich liquid outlet of the absorption tower is communicated with a cold source channel inlet of the intermediate heat exchanger through a low-temperature rich liquid pipeline; a cold source channel outlet of the intermediate heat exchanger is communicated with a rich liquid inlet of the desorption tower through a high-temperature rich liquid pipeline; a carbon dioxide outlet of the desorption tower is communicated with a carbon dioxide recovery pipeline; a steam inlet of the desorption tower is communicated with a steam outlet of the reboiler; a barren liquor outlet of the desorption tower is communicated with a liquid inlet of the reboiler, and a liquid outlet of the reboiler is communicated with a barren liquor inlet of the absorption tower. The invention further discloses a ship tail gas carbon dioxide trapping and recycling method. The carbon capture experiment platform has the beneficial effects that an experiment platform is provided for a carbon capture experiment, and the influence of a carbon capture basic cycle experiment and an intercooling process on a carbon capture result can be realized.

The utility model provides a cold, warm and hot water triple-generation system of a two-stage compression ground source heat pump. The cold, warm and hot water triple-generation system comprises a compressor, an intermediate heat exchanger, a buried heat exchanger, a plurality of other heat exchangers, a valve assembly and a solar heat collection assembly. The compressor comprises a low-pressure compressor and a high-pressure compressor; an outlet of the low-pressure compressor is connected with an inlet of the high-pressure The intermediate heat exchanger comprises a first intermediate heat exchanger and a second intermediate heat exchanger; other heat exchangers comprise an outdoor heat exchanger and an indoor heat exchanger; the first intermediate heat exchanger is connected with a low-pressure compressor outlet, the outdoor heat exchanger and the second intermediate heat exchanger. The second intermediate heat exchanger is connected with the indoor heat exchanger; the valve assembly comprises a three-way valve and a four-way valve. The ground source heat pump system solves the problems that an existing ground source heat pump system is single in function and low in working efficiency.

The application discloses a refrigeration system and a control method, device, equipment and medium thereof, to provide a refrigeration system coexisting air-cooled refrigeration mode and liquid-cooled refrigeration mode. The system comprises a compressor circulation heat exchange system and a natural cold source circulation heat exchange system for heat exchange through an intermediate heat exchanger. The compressor circulation heat exchange system comprises a throttling valve, a first condenser and at least one compressor connected in sequence on the primary side of the intermediate heat exchanger, one end of the primary side of the intermediate heat exchanger is connected with the throttling valve, and the other end is connected with the common end of the at least one compressor. The natural cold source circulation heat exchange system comprises a pump, an air-cooled heat exchanger, a liquid-cooled heat exchanger and a second condenser connected on the secondary side of the intermediate heat exchanger. The air-cooled heat exchanger and the liquid-cooled heat exchanger are connected in parallel and then connected between the pump and the second condenser. One end of the secondary side of the intermediate heat exchanger is connected with the second condenser, and the other end is connected with the pump.

The control method comprises the steps that the rotating speed of a high-temperature-stage inverter compressor is mainly comprehensively determined by the high-temperature-stage exhaust temperature, the high-temperature-stage condenser temperature, the high-temperature-side outlet temperature of an intermediate heat exchanger and the high-temperature-stage return air temperature; through dynamic adjustment of the first fuzzy PID controller, the working condition and energy efficiency of the high-pressure side of the system are optimized; the rotating speed of the low-temperature-stage frequency conversion compressor is mainly comprehensively determined by the temperature in the box, the real-time rotating speed of the high-temperature-stage compressor, the low-temperature-stage exhaust temperature, the temperature of the intermediate heat exchanger and the low-temperature-stage return air temperature, and the rotating speed is dynamically adjusted through the second fuzzy PID controller so as to ensure that the temperature in the box is accurate and stable and is matched with the high-temperature-stage capacity in real time. Through cooperative control of the parameter groups, the problems of low efficiency and unstable operation caused by mismatching of two-stage capabilities of the cascade system are solved, and efficient, stable and reliable operation of the system under all working conditions is realized.

This invention discloses a thermal management system and a vehicle having the same. The thermal management system includes an air conditioning module, an intermediate heat exchanger, and a heat absorption / release module. The air conditioning module includes a compressor, an in-vehicle heat exchanger, and an external heat exchanger connected in a refrigerant circuit. The intermediate heat exchanger has a first heat exchange path and a second heat exchange path that exchange heat with each other. The first heat exchange path is connected to the refrigerant circuit. The heat absorption / release module and the second heat exchange path of the intermediate heat exchanger are connected in a coolant circuit. According to the thermal management system of this invention, excess heat or cold energy in the air conditioning module is stored through the heat absorption / release module, and the heat absorption / release module can release energy, avoiding energy waste and reducing vehicle energy consumption.

The invention provides a zero-emission power circulation and fuel gas supply system and method for an LNG power-driven ship. The system comprises an internal combustion engine, a nitrogen membrane separation device, a heat regenerator, a water separator, a liquid CO2 storage tank, a liquid oxygen pump, an LNG pump, an LNG storage tank, a liquid oxygen storage tank, a CO2 condenser, a circulation compressor, a gas buffer tank, a CO2 separator, a first-stage water cooler and a second-stage intermediate heat exchanger. According to the internal combustion engine, LNG serves as fuel, an argon and oxygen mixture serves as a circulating working medium to replace air and natural gas to be combusted and push a piston to move, water vapor and gas CO2 in waste gas generated by the internal combustion engine are condensed and separated after being subjected to stepped cooling, and CO2 is liquefied through a circulating compressor and recycled to a liquid CO2 storage tank. According to the invention, argon is used for replacing air to realize waste heat recovery of the internal combustion engine, so that the energy efficiency of the system is improved, and meanwhile, CO2 capture and zero emission of gaseous pollutants are realized.

This air conditioning device (100) comprises: at least one first branch unit (10b, 10c); at least one second branch unit (10a); a plurality of indoor units (50a, 50b, 50c); a forward main pipe (61) and a return main pipe (62); and a plurality of forward branch pipes (51a, 51b, 51c) and a plurality of return branch pipes (52a, 52b, 52c). An intermediate heat exchanger (43) is configured such that heat exchange is performed between a refrigerant flowing through a first refrigerant pipe path (R1) and a heat medium flowing through a first pipe path (C1). A first heat exchanger (12) is configured such that heat exchange is performed between the heat medium flowing through the first pipe path (C1) and a refrigerant flowing through a second refrigerant pipe path (R2). A second heat exchanger (22) is configured such that heat exchange is performed between a heat medium flowing through a second pipe path (C2) and the refrigerant flowing through the second refrigerant pipe path (R2).

Even when a non-azeotropic refrigerant is used and an intermediate heat exchanger is provided, a decrease in user comfort is suppressed by ensuring a pressure difference of the non-azeotropic refrigerant, particularly at the start-up of the compressor, and operating in accordance with the required capacity. [Solution] The system includes a compressor 1, a condenser, a pressure reducing means 3, and an evaporator connected in sequence by refrigerant piping, a refrigerant circuit C in which a non-azeotropic refrigerant mixture circulates, an intermediate heat exchanger 6, a bypass circuit B that bypasses the intermediate heat exchanger 6, a bypass valve B1 provided in the bypass circuit B, a condenser outlet temperature sensor 7, an evaporator outlet temperature sensor 8, and a control device 9. The control device 9 includes a judgment unit 93 that judges whether the condenser outlet temperature is equal to or higher than a predetermined condensation temperature value, and a drive control unit 94 that controls the bypass valve B1 to be fully open when the compressor 1 is started, and controls the bypass valve B1 to be fully closed if the judgment unit 93 judges that the condenser outlet temperature is equal to or higher than the predetermined condensation temperature value.

The cascade type cold and heat cogeneration system comprises a high-temperature-stage circulation unit and a low-temperature-stage circulation unit, and the high-temperature-stage circulation unit and the low-temperature-stage circulation unit are coupled through an intermediate heat exchanger; a cooling heat exchanger is arranged in front of a refrigerant inlet of a high-temperature-stage valve in the high-temperature-stage circulating unit; a low-temperature fluid inlet / outlet of a low-temperature heat exchanger in the low-temperature circulation unit communicates with a low-temperature fluid inlet / outlet of the cooling heat exchanger to form a circulation path; and the cooling heat exchanger is used for reducing the temperature of the high-temperature refrigerant passing through the cooling heat exchanger according to heat exchange between the flowing-in low-temperature-stage fluid and the high-temperature-stage refrigerant. In this way, the temperature of the high-temperature-stage refrigerant passing through the cooling heat exchanger can be reduced, local temperature limiting cooling is conducted on the high-temperature-stage valve, it is guaranteed that the high-temperature-stage valve operates within the normal temperature range, the service life of the high-temperature-stage valve is prolonged, and the structural stability of the high-temperature-stage valve is improved.

The utility model provides an adjustable rapid heating and cooling system which comprises a temperature control system, the temperature control system comprises a refrigeration module and a heating module, the refrigeration module comprises an auto-cascade refrigeration system and an auxiliary refrigeration system, and the heating module comprises a steam heating system. The auto-cascade refrigeration system comprises a first compressor, an oil separator, a condenser and a first drying filter which are sequentially arranged, and the first drying filter is sequentially connected with an auxiliary subcooler, a first channel of a subcooling heat exchanger, a gas-liquid separator, a first channel of an intermediate heat exchanger, an evaporation expansion valve and a first channel of an evaporator. A first channel of the evaporator is connected with the inlet end of the first compressor through a second channel of the intermediate heat exchanger and a second channel of the supercooling heat exchanger. The inlet end of the evaporator second channel is connected with the heating module and supplies cold to the heating system. According to the utility model, a refrigerating system is combined with municipal energy-saving steam, so that not only can the cost of applicable equipment of a user be reduced, but also various functional requirements of the user can be met.

To appropriately control flow rates in two cooling paths in a fuel cell cooling system.SOLUTION: A fuel cell cooling system includes: a first cooling path circulating a first refrigerant for a fuel cell; first flow rate adjustment means provided in the first cooling path to adjust the flow rate in the first cooling path; a radiator; a second cooling path circulating a second refrigerant for the radiator; second flow rate adjustment means provided in the second cooling path to adjust the flow rate in the second cooling path; an intermediate heat exchanger exchanging heat between the first cooling path and the second cooling path; and a controller controlling the first flow rate adjustment means and the second flow rate adjustment means to adjust the flow rate of each of the first cooling path and the second cooling path. The controller determines, after determining a first target value that is a target value of the flow rate in the first cooling path, a second target value that is a target value of the flow rate in the second cooling path, based on the first target value.SELECTED DRAWING: Figure 1

The utility model belongs to air conditioning technical field, concretely relates to a carbon dioxide two-stage throttling with intermediate cooling heat pump air conditioning system for vehicle, include: compressor, the output of compressor, the first port of first heat exchanger and the first port of second heat exchanger are connected with the three ports of first electric three-way valve communication respectively, the liquid inlet of liquid storage tank is connected with the first port of intermediate heat exchanger communication, the second port of intermediate heat exchanger is connected with the first port of second electronic expansion valve communication, the second port of second electronic expansion valve, the second port of first heat exchanger and the second port of second heat exchanger are connected with the three ports of third electric three-way valve communication respectively. Dry carbon dioxide gas, all will pass through intermediate heat exchanger before entering the input of compressor, utilize the carbon dioxide medium of temperature still higher to heat, thereby reduced carbon dioxide electric compressor power consumption, more energy -conserving.

In the fuel cell cooling system, a first cooling channel, a fuel cell, a second cooling channel, a radiator, a heater, a heater core, and an intermediate heat exchanger are provided, and the second cooling channel includes a bypass channel provided in parallel to the radiator, and during power generation of the fuel cell, the coolant is circulated in the first cooling channel on a path through the fuel cell and the intermediate heat exchanger, and the coolant is circulated in the second cooling channel on a path through the intermediate heat exchanger, the heater, the heater core, and the bypass channel, thereby performing a first operation of heating air by the heater core. In the first operation, the temperature of the coolant in the second cooling channel is unlikely to decrease.