132 results about "Intermediate heat exchanger" patented technology

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 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 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.

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.

The present application relates to the technical field of heat pump, in particular to a two-coupled heat pump system. The present application aims to solve the problem of low energy efficiency of the existing two-coupled heat pump. For this purpose, the two-coupled heat pump system of the present application comprises: a thermoacoustic engine comprising a cold-end heat exchanger, a first hot-end heat exchanger and a second hot-end heat exchanger; a first outdoor heat exchange part in heat exchange with the cold-end heat exchanger; a compressor in circulation communication with the first hot-end heat exchanger through a first refrigerant pipeline; a throttling element between the exhaust port of the compressor and one end of the first hot-end heat exchanger; an intermediate heat exchanger having a first heat exchange flow path and a second heat exchange flow path, the first heat exchange flow path being located between the exhaust port of the compressor and the throttling element; a first indoor heat exchange part in direct or indirect heat exchange with the second hot-end heat exchanger; and a second indoor heat exchange part in heat exchange with the second heat exchange flow path. The present application can realize greater temperature span operation of the system, improve the energy efficiency and application range of the system.

The invention relates to the technical field of reactor residual heat removal, in particular to a residual heat removal pipeline condensation water hammer suppression system and method based on air filling, and the system comprises a loop subsystem, a natural circulation loop, an air injection subsystem and an ocean heat trap; the loop subsystem comprises a reactor core, a pressure container and a coolant circulating pipeline; the natural circulation loop comprises an intermediate heat exchanger, a seawater circulation pipeline and a high-temperature steam pipeline, the intermediate heat exchanger is connected with a loop subsystem, the seawater circulation pipeline is connected with the intermediate heat exchanger and the ocean heat trap, and the high-temperature steam pipeline is connected with an outlet of the intermediate heat exchanger and the ocean heat trap; the gas-phase system formed by mixing air and steam is used for avoiding generation of local negative pressure after steam condensation, condensation water hammers caused by liquid column collision are inhibited from the source, the risks of instantaneous high pressure, pipeline oscillation and the like can be effectively reduced, and the device adapts to the special structure and low-pressure operation attribute of the ocean floating nuclear energy platform.

The utility model discloses a floor heating and domestic hot water combined heat pump system, comprising: refrigerant circulation loop: compressor, first air side heat exchanger, four -way valve, second air side heat exchanger and intermediate heat exchanger form, intermediate heat exchanger includes: first heat exchange pipe part and second heat exchange pipe part, water circulation loop: floor heating, first heat exchange pipe part, second heat exchange pipe part, water pump and water tank heat exchanger constitute, first heat exchange pipe part is connected with floor heating, second heat exchange pipe part is connected with first heat exchange pipe part, water tank heat exchanger and floor heating, first control valve controls first heat exchange pipe part and floor heating or water tank heat exchanger intercommunication, when system is in floor heating water tank linkage operation mode, first heat exchange pipe part, second heat exchange pipe part, first control valve and water tank heat exchanger form domestic hot water circulation loop, and floor heating, second heat exchange pipe part form first floor heating water circulation loop, the heat pump system of the utility model sets up one intermediate heat exchanger and can realize the simultaneous supply of floor heating and domestic hot water.

The invention relates to a cascade refrigeration system, a control method thereof and refrigeration equipment, relates to the technical field of refrigeration, and aims to improve the refrigeration response speed when a low-temperature refrigeration loop of the cascade refrigeration system is started. The cascade refrigeration system comprises an intermediate heat exchanger, a high-temperature refrigeration loop, a low-temperature refrigeration loop and a bypass loop. The high-temperature refrigerating loop comprises a first compressor, a first condenser, a first throttler and an intermediate heat exchanger which are sequentially connected, and the intermediate heat exchanger is an evaporation side in the high-temperature refrigerating loop. The low-temperature refrigerating loop comprises a second compressor, an intermediate heat exchanger, a second throttler and an evaporator which are sequentially connected, and the intermediate heat exchanger is a condensation side in the low-temperature refrigerating loop. The bypass loop is arranged in the low-temperature refrigeration loop. And the bypass loop comprises a circulating pump and is configured as follows: before the second compressor is started, the high-temperature refrigerating loop is started, and the bypass loop is conducted for a first preset time so as to drive the refrigerant to circularly flow along the low-temperature refrigerating loop.

The present application relates to the technical field of heat pump, in particular to a thermoacoustic heat pump device. The present application aims to solve the problem that the application scene of the existing vapor compression heat pump is limited. For this purpose, the thermoacoustic heat pump device of the present application comprises: a thermoacoustic machine comprising a hot end heat exchanger and a cold end heat exchanger; a compressor in circulation communication with the cold end heat exchanger; a first heat exchanger, one end of which is in communication with the suction port of the compressor; a throttling element, two ends of which are respectively in communication with one end of the cold end heat exchanger and the second end of the first heat exchanger; a second heat exchanger in circulation communication with the hot end heat exchanger through a first cold carrier pipeline; a first pump body arranged in the first cold carrier pipeline; the intermediate heat exchanger has a first heat exchange flow path and a second heat exchange flow path, the first heat exchange flow path is communicated between the exhaust port of the compressor and the throttling element, and the second heat exchange flow path is communicated with the first cold carrier pipeline. The present application can realize the combination of the thermoacoustic machine and the vapor compression heat pump, and improve the applicability and working efficiency of the thermoacoustic heat pump device.

This invention discloses a dual-cycle, installation-free, energy-saving air conditioner that recovers waste heat for refrigeration, belonging to the field of air conditioning and refrigeration technology. It incorporates a compression refrigeration system and an adsorption refrigeration system within the casing. A sealed phase-change heat transfer coupler is fitted onto the outer wall of the compressor's high-pressure pipe. The inner sleeve of the coupler, along with the outer sleeve wound around the generator's outer wall, forms a vacuum phase-change loop via a steam riser and a liquid return pipe, transferring compressed waste heat across the system to the generator. A double-layer jacket for condensation heat recovery is fitted onto the outer wall of the second condenser, connected to an auxiliary heating coil via an electronic flow control valve, an intermediate heat exchanger, and a circulating pump. This auxiliary heating coil, alternately wound around the generator with the outer sleeve, forms a dual heat source compensation. The insulation box is divided into a desorption chamber and a cold air chamber. Cold air from the cold air chamber is guided to the compressor and the second condenser for secondary cooling via an electric air valve and a duct. The control unit coordinates and regulates each actuator based on multiple temperature thresholds. This invention achieves dynamic coupling of dual-cycle waste heat recovery and cold source reuse, eliminating the need for an outdoor unit and improving the overall system energy efficiency.

The application discloses a cascade refrigeration system flow control method and device, a refrigeration equipment and a medium. The cascade refrigeration system comprises a low-temperature stage compressor, a high-temperature stage compressor, an intermediate heat exchanger, a temperature sensor, a condensing fan and a temperature drop rate sensor. The temperature sensor is arranged on the intermediate heat exchanger. The method comprises the following steps: when the low-temperature stage compressor is started, the real-time temperature monitored by the temperature sensor is synchronously acquired, and the running time length of the low-temperature stage compressor is recorded; the running state of the low-temperature stage compressor is determined according to the real-time temperature and the running time length; and if the low-temperature stage compressor is in a low-flow running state, a low-flow response mode is started. The temperature detected by the temperature sensor and the calculated instantaneous temperature drop rate are utilized to determine the flow condition when the low-temperature stage compressor is started, and the flow control is performed according to the instantaneous temperature drop rate, so that the problem that the refrigerant flow is low and the temperature drop rate is slow due to the liquid accumulation in the intermediate heat exchanger when the low-temperature stage compressor is started is solved.

The invention provides a generator set waste heat utilization system and a control method, and relates to the technical field of efficient utilization of industrial waste heat, by establishing a continuous blow-down water vaporization proportion correction calculation formula and introducing a continuous blow-down sewage waste heat coefficient, high, medium and low states of continuous blow-down sewage waste heat are calculated, and the continuous blow-down water vaporization proportion correction calculation formula is established. Whether a low-pressure cylinder of the generator set exhausts air to supplement a heat source or not and whether an intermediate heat exchanger is used for achieving primary heating of heating return water are judged, efficient recovery of waste heat of the generator set in a generator and an evaporator of the lithium bromide heat pump unit is achieved through a waste heat utilization system and a control method, and it is guaranteed that the heating return water reaches the common heating required temperature; the impact on the waste heat utilization system caused by changes of the continuous sewage discharge rate, continuous sewage thermal parameters and the like is avoided, the discharged sewage waste heat is recycled to be used for the heating system, and the operation stability and reliability of the heating system using the discharged sewage waste heat are improved.

The application discloses an energy storage thermal management system based on an air-floating centrifugal compressor, which comprises a refrigeration module, an intermediate heat exchanger and a cooling module. The refrigeration module is used for refrigerant circulation and comprises an air-floating centrifugal compressor for compressing refrigerant, a condenser for cooling compressed refrigerant and a throttling device for throttling and expanding the refrigerant after cooling. The intermediate heat exchanger comprises two inlets and two outlets, which are communicated with pipelines of the refrigeration module and the cooling module respectively, so that the refrigerant and the coolant realize heat exchange. The cooling module is used for coolant circulation to cool the energy storage device and comprises a water pump for providing power for the coolant circulation. By adopting the air-floating centrifugal compressor as the core component of the refrigeration module, the weight and volume of the thermal management system can be effectively reduced, and the reliability of the compressor and the system can be improved.

The present application relates to the technical field of refrigeration system, and particularly relates to a control method of a wind-liquid fusion cold and warm phase change cold plate temperature control system, which comprises 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. Each cooling branch comprises a liquid collecting branch pipe, a gas collecting branch pipe, a flow regulating valve and a plurality of cold plate assemblies. The control method further comprises a mode selection step, a cold plate temperature detection step, a gas collecting main pipe superheat detection step, a gas collecting branch pipe superheat detection step and an adjusting step. The present application enables the refrigerant in the cold plate assembly to be in a gas-liquid two-phase state as much as possible, while ensuring the uniformity of the flow rate of each flow path. In winter, the indoor air temperature can also be heated to keep the battery temperature within a reasonable range.

The invention relates to the technical field of heat pumps, in particular to a heat pump system. The problem that the application scene of the thermo-acoustic heat pump is single is solved. To this end, the heat pump system of the present application comprises: a thermo-acoustic machine having a cold-end heat exchanger and a hot-end heat exchanger; the first outdoor heat exchange part exchanges heat with the cold end heat exchanger through a first secondary refrigerant; an exhaust port of the compressor communicates with one end of the indoor heat exchanger, and an air suction port communicates with one end of the second outdoor heat exchange part; two ends of the throttling element are respectively communicated with the other end of the indoor heat exchanger and the other end of the second outdoor heat exchange part; and the intermediate heat exchanger is provided with a first heat exchange flow path and a second heat exchange flow path, the first heat exchange flow path exchanges heat with the hot end heat exchanger through a second secondary refrigerant, and the second heat exchange flow path exchanges heat with a refrigerant between the indoor heat exchanger or the exhaust port of the compressor and the throttling element. The advantages of the thermo-acoustic machine and the compressor can be exerted, and the applicability of the system to different application scenes is improved.

The invention relates to the technical field of heat pumps, in particular to a dual heat supply pump system. The invention aims to solve the problem of low energy efficiency of the existing steam compression cycle dual heat supply pump in a low-temperature environment. To this end, the heat pump system of the present application comprises: a thermo-acoustic machine having a cold-end heat exchanger and a hot-end heat exchanger; the first outdoor heat exchange part exchanges heat with the cold end heat exchanger through a first secondary refrigerant; the dual-purpose heat exchanger directly or indirectly exchanges heat with the hot end heat exchanger through a second refrigerating medium; the intermediate heat exchanger is provided with a first heat exchange flow path and a second heat exchange flow path, and the first heat exchange flow path exchanges heat with the dual-purpose heat exchanger; an exhaust port of the compressor communicates with one end of the second heat exchange flow path, and an air suction port communicates with one end of the second outdoor heat exchange part; the two ends of the throttling element communicate with the other end of the second heat exchange flow path and the other end of the second outdoor heat exchange part correspondingly. Different operation modes can be selected based on different application scenes, and the operation energy efficiency of the system is improved.

The present application relates to the technical field of air conditioning, in particular to an air conditioning system. The present application aims to solve the problem that the application scene of the existing vapor compression cycle air conditioner is limited. To this end, the air conditioning system of the present application comprises: a thermoacoustic engine having a cold end heat exchanger, a first hot end heat exchanger and a second hot end heat exchanger; a first outdoor heat exchange part which exchanges heat with the cold end heat exchanger through a first cold carrier; a heat storage device for storing water, the water inlet and outlet of which are communicated with both ends of the first hot end heat exchanger; a first pump body arranged in the first cold carrier pipeline; a heat exchange component which directly or indirectly exchanges heat with the second hot end heat exchanger; an intermediate heat exchanger having a first heat exchange flow path, a compressor, a first heat exchange flow path, a throttling element and a second outdoor heat exchange part which are sequentially communicated; the first heat exchange flow path of the intermediate heat exchanger can exchange heat with the water and / or the second cold carrier in the heat storage device. The present application can improve the application scene of the air conditioner and avoid the decline of the working efficiency of the air conditioning system in high and low temperature environments.

The application discloses a nuclear power device control system and method coupled with a heat pipe reactor and an sCO2 Brayton cycle, including a rotating shaft rotating speed control system and method, which maintains the rotating shaft rotating speed constant by adjusting the working medium flow entering the turbine, so as to ensure the power supply quality of the whole system; a compressor inlet temperature and inlet pressure control system and method, which respectively maintains the compressor inlet temperature and inlet pressure constant by adjusting the seawater flow and the pressure tank pressure, so as to ensure that the temperature and density of the working medium at the compressor inlet are in a supercritical state; and an intermediate heat exchanger outlet temperature control system and method, which adjusts the reactor power by controlling the core reactivity, and then maintains the intermediate heat exchanger outlet temperature constant. The application can provide a reference for the control system design of a high-efficiency compact nuclear power device coupled with a heat pipe reactor and a supercritical carbon dioxide Brayton cycle.

The application discloses a method for controlling an air conditioner, the air conditioner comprising: an indoor-side circulating loop, sequentially provided with a water pump, an intermediate heat exchanger, a first electronic expansion valve and an indoor unit along a medium flow direction during refrigeration; and an energy storage device, one end of which is connected to a medium inflow end of the first electronic expansion valve, and the other end of which is connected to a medium inflow end of the water pump; the method comprising: determining an actual temperature of the energy storage device in a case where a working period of the indoor unit is a first period; closing an outdoor unit and determining an air conditioner target temperature and an indoor environment temperature in a case where the actual temperature of the energy storage device meets a discharging condition; and controlling a first electronic expansion valve opening degree and a water pump operating frequency according to the actual temperature of the energy storage device, the air conditioner target temperature and the indoor environment temperature. The application combines the adjustment of the water pump operating frequency and the electronic expansion valve opening degree to more accurately and reasonably control the flow size in the circulating loop. The application also discloses a device for controlling an air conditioner, an air conditioner and a storage medium.

This invention discloses a carbon dioxide-based data center cooling system, belonging to the field of data center thermal management technology. The system includes a cooling device, at least one storage tank, a coolant distribution unit, an inlet manifold, and an outlet manifold. The cryogenic liquid carbon dioxide produced by the cooling device is stored in the storage tank and transported to server racks within the data center via the distribution unit and pipelines to cool high-power AI chips. The cooled working fluid returns to the cooling device for recycling. The system provides two cooling implementation methods: one is direct cooling of the chips with liquid carbon dioxide; the other is indirect cooling through an independent carbon dioxide circulation loop formed by an intermediate heat exchanger. Furthermore, the system integrates a waste heat recovery unit, which can use the compression heat generated by the cooling device for power generation or district heating. This invention utilizes carbon dioxide as the working fluid to achieve efficient cooling and comprehensive energy utilization for data centers, offering advantages such as high energy efficiency and environmental friendliness.

This invention belongs to the field of vehicle air conditioning technology, specifically relating to a vehicle heat pump air conditioning unit, thermal management system, and control method. The vehicle heat pump air conditioning unit includes a controller, a heat pump circuit, a cooling water circuit, a first heat exchanger installed on the heat pump circuit, a second heat exchanger installed on the cooling water circuit, and a first intermediate heat exchanger installed between the heat pump circuit and the cooling water circuit. The controller controls the heat pump circuit to send refrigerant to the first heat exchanger and the first intermediate heat exchanger for heat absorption; the controller also controls the heat pump circuit to send refrigerant to the first heat exchanger and the first intermediate heat exchanger for heat release; and the controller further controls the cooling water circuit to send cooling water to the second heat exchanger for heat absorption or release. The vehicle heat pump air conditioning unit provided by this invention can form a direct and indirect composite heat pump air conditioning system, solving the problem of balancing energy efficiency and uniformity of outlet air temperature in existing vehicle heat pump air conditioning systems.

The invention provides a new energy vehicle thermal management system and a vehicle with the same, the new energy vehicle thermal management system comprises a composite intermediate heat exchanger, the composite intermediate heat exchanger is provided with a refrigeration flow channel, a first cooling liquid flow channel and a second cooling liquid flow channel, the refrigeration flow channel is adjacent to the first cooling liquid flow channel, and the first cooling liquid flow channel is adjacent to the second cooling liquid flow channel; the second cooling liquid flow channel and the refrigeration flow channel are arranged at an interval; an energy storage assembly; a multi-way valve; and the first cooling liquid flow channel is communicated with and disconnected from the cooling loop assembly through a multi-way valve. The communication of the cooling loop is flexibly controlled according to the vehicle running state and the thermal management requirement, accurate temperature control over the battery pack and the power system is achieved, the battery performance and stable running of the power system are guaranteed, the performance and the cruising ability of the new energy vehicle are overall improved, and the energy consumption is reduced. The problems that in the prior art, a traditional heat pump system is low in overall efficiency and poor in reliability are solved.

The application discloses a low-energy-consumption MTO methanol rectification device and method using reaction heat. The device comprises a methanol reactor, a methanol intermediate heat exchanger, a methanol air cooler, a methanol water cooler and a methanol buffer tank which are connected in sequence. The methanol reactor and the methanol intermediate heat exchanger form a loop. The methanol intermediate heat exchanger is also provided with a synthesis gas feeding port. The methanol buffer tank is connected with a methanol expansion tank. The methanol expansion tank is connected with a stabilizing tower. The top of the stabilizing tower is connected with a cooling reflux assembly through a reflux pipeline. The bottom of the stabilizing tower is connected with a stabilizing tower bottom pump and an MTO-grade methanol water cooler in sequence. The bottom of the stabilizing tower is also connected with a stabilizing tower reboiler through a loop. A heat medium circulation system is also connected between the methanol intermediate heat exchanger and the methanol air cooler. The heat medium circulation system is also connected to a pipeline between the methanol expansion tank and the stabilizing tower, so that the consumption of the cooling medium and the energy consumption of the stabilizing tower heating can be effectively reduced.

The invention relates to the technical field of heat pumps, in particular to a heat pump system. The problem that the application scene of the thermo-acoustic heat pump is single is solved. To this end, the heat pump system of the present application comprises: a thermo-acoustic machine having a cold-end heat exchanger and a hot-end heat exchanger; the first outdoor heat exchange part exchanges heat with the cold end heat exchanger through a first secondary refrigerant; the indoor heat exchanger exchanges heat with the hot end heat exchanger through a second refrigerating medium; the intermediate heat exchanger is provided with a first heat exchange flow path and a second heat exchange flow path, and the first heat exchange flow path exchanges heat with the indoor heat exchanger through a third secondary refrigerant; an exhaust port of the compressor communicates with one end of the second heat exchange flow path, and an air suction port communicates with one end of the second outdoor heat exchange part; the two ends of the throttling element communicate with the other end of the second heat exchange flow path and the other end of the second outdoor heat exchange part correspondingly. The advantages of the thermo-acoustic machine and the compressor can be effectively exerted, and the applicability of the system to different application scenes is improved.

The present application relates to an air conditioning system comprising a receiver drier, an inlet of the receiver drier being configured to receive a refrigerant condensed but not throttled, the air conditioning system further comprising an intermediate heat exchanger; the intermediate heat exchanger comprising a first heat exchange portion and a second heat exchange portion; the first heat exchange portion being in communication with an outlet of the receiver drier to receive the refrigerant flowing out of the receiver drier; the second heat exchange portion being configured to receive the refrigerant throttled and evaporated.

The invention belongs to the technical field of heat pumps, and particularly relates to a control method, device and equipment of a cascade heat pump system and a storage medium. The method comprises the following steps: acquiring a first temperature and a first pressure through a first detection device, determining a first saturated evaporation temperature according to the first pressure, determining a first suction superheat degree corresponding to a high-temperature stage loop according to the first temperature and the first saturated evaporation temperature, and determining a second suction superheat degree corresponding to the high-temperature stage loop according to the first suction superheat degree and a first preset suction superheat degree, the opening state of the first expansion valve is controlled; according to the method, the opening degree of the first expansion valve is adjusted based on the suction superheat degree corresponding to the evaporation effect of the first heat exchanger when the high-temperature loop operates independently, so that the refrigeration effect of the system is improved; and when the high-temperature stage loop and the low-temperature stage loop operate at the same time, the opening degree of the first expansion valve is adjusted based on the suction superheat degree corresponding to the evaporation side of the intermediate heat exchanger, so that the heating effect of the system is improved, and the user experience feeling is improved.

The utility model provides a solar energy and geothermal energy complementary two-stage compression heat pump system which is characterized by comprising a two-stage compression heat pump unit and a clean energy heating unit, the two-stage compression heat pump unit comprises a condenser, an expansion valve, an intermediate heat exchanger, a heat compensation heat exchanger, a high-pressure compressor, an expansion valve, an evaporator and a low-pressure compressor; the clean energy heating unit comprises a heating circulating pump, a heat storage tank, a heat collection circulating pump, a buried pipe and a solar heat collector. The temperature difference between supply water and return water of a long-distance conveying pipe network and a primary network is increased, the circulating water flow of the heat supply network is reduced, the operation power consumption of a long-distance conveying heat supply network circulating water pump and a primary network circulating water pump is greatly reduced, clean energy is supplemented, the heating cost and the conveying cost are reduced, and the energy utilization rate and the heat supply economical efficiency are improved.