3507results about "Compression machines" patented technology

A thermal management arrangement for vehicles includes a refrigerant circuit having a chiller function and / or heat pump function and a heat carrier network for cooling and / or heating components of the vehicle. The heat carrier network has a heat carrier reservoir and a plurality of heat carrier supply segments fed from the heat carrier reservoir. A separately controlled and regulated ambient heat exchanger supply segment implements a circuit having a central low-temperature ambient heat exchanger and least one heat carrier reservoir.

A heat pump system for a vehicle is configured to perform cooling or heating of the vehicle interior by using a natural refrigerant, and efficiently adjust the temperature of the battery module by using a single chiller that heat-exchanges refrigerant and coolant.

A heat pump system for a vehicle cools or heats the vehicle interior by using a natural refrigerant, and efficiently adjusts the temperature of a battery module by using a single chiller that exchanges heat between refrigerant and coolant.

A heat pump system for a vehicle cools or heats the vehicle interior by using a natural refrigerant, and efficiently adjusts the temperature of a battery module by using a single chiller that exchanges heat between refrigerant and coolant.

A dilution refrigerator and a method for operating same as described. The dilution refrigerator comprising a plurality of cryostats each comprising a plurality of temperature-controlled flanges inside a vacuum chamber, the temperature-controlled flanges cooled to progressively lower temperatures. Dilution units are disposed inside each of the cryostats and operable to cool at least a subset of the temperature-controlled flanges. A gas handling system is fluidly coupled to the plurality of cryostats and comprises a flow circuit and flow control devices interconnecting a gas mixture reservoir with the dilution units. A controller is coupled to the gas handling system and configured for operating the flow control devices in accordance with a sequence of operations that open and close paths in the flow circuit that allow a gas mixture to circulate between the gas mixture reservoir and the dilution units.

The invention provides a water working medium quasi-saturated compression high-temperature heat pump system based on an ejector, and belongs to the field of compression heat pumps. The problems that after an existing compression system flows through a throttling valve, the superheat degree of steam exhaust is large due to high-temperature lift compression, and the loss of available energy in the throttling process from condensate to a two-phase region is too large are solved. A multi-stage spraying atomization structure is adopted, a micro-nano liquid drop mist flow with the particle size controllable to be 50-200 nm and the liquid mass fraction adjustable to be 5%-10% is formed before compression, the airflow humidity regulation and control precision is remarkably improved, the quasi-saturation compression process is matched, and the thermal matching performance and the energy efficiency level of a system are effectively improved; a main flow inlet of the jet atomizer is changed into a compressor outlet from a condenser outlet, so that the response speed is increased, and meanwhile the jet atomizer is suitable for a complex variable-working-condition system; or single-stage compression is optimized into a two-stage compression form, so that higher heating temperature and more stable system operation are realized; or liquid from a lower-pressure position is injected, so that the injection capacity is improved.

The invention discloses a cross-supercritical CO2 high-temperature heat pump system and method for supplying steam above 300 DEG C. The cross-supercritical CO2 high-temperature heat pump system comprises a high-temperature compression heat pump subsystem and a steam flash evaporation and reheating subsystem. By adopting the oil-free CO2 compressor, the stable operation of the system under a high-temperature heat supply condition is ensured; by optimizing system configuration and adopting the two-stage heat regenerator design, the suction temperature is increased, and then the exhaust temperature is remarkably increased; and through a dynamic parameter optimization control strategy, system operation parameters are monitored in real time and adjusted in a self-adaptive manner. Under the combined action of the technical measures, efficient and stable output of high-temperature steam is achieved, low-grade waste heat is effectively recycled, dependence on primary energy is greatly reduced, and operation equivalent carbon emission in the steam supply process is reduced. The limitation of a traditional heat pump on the aspect of high-temperature heat supply is successfully overcome, an innovative and sustainable solution is provided for the field of high-temperature heat supply, and the heat pump has wide application prospects.

The invention discloses a waste heat source transcritical CO2 heat pump system and an optimization method thereof. The waste heat source transcritical CO2 heat pump system comprises a refrigerant connecting pipeline, a gas cooler water side connecting pipeline, an evaporator water side connecting pipeline and a PID control module connected with the refrigerant connecting pipeline, the gas cooler water side connecting pipeline and the evaporator water side connecting pipeline. The compressor is connected with a first gas cooler, the first gas cooler is connected with an intermediate heat regenerator, the intermediate heat regenerator is connected with a second gas cooler, the second gas cooler is connected with an electronic expansion valve, the electronic expansion valve is connected with an evaporator, the evaporator is connected with the intermediate heat regenerator, the intermediate heat regenerator is connected with the compressor, and the intermediate heat regenerator is connected with a bypass adjusting valve in parallel. A water inlet of the second gas cooler is provided with a first water pump, a water outlet of the second gas cooler is connected with a water inlet of the first gas cooler, and the water side of the second gas cooler is connected with a water temperature adjusting valve in parallel. A second water pump is arranged at a water inlet of the evaporator. Under the conditions of a waste heat source and a low pressure ratio, deep utilization of waste heat resources can be achieved, and intermediate temperature backheating required by high heat supply temperature is met.

The invention discloses a multifunctional integrated gas control system for a dilution refrigerator, and particularly relates to the field of refrigeration and low-temperature engineering, which comprises a liquid nitrogen cold trap, a gas buffer tank, an integrated valve box, a dilution refrigeration internal circulation pipeline, a diaphragm compressor, a roots pump, a turbo molecular pump and a vacuum suction pump set. According to the system, a highly-integrated valve box module is used and is responsible for implementing gas circuit control on different stages such as dilution refrigeration cycle starting, operation and shutdown rewarming; according to the invention, conductance optimization and heat loss reduction are carried out on gas paths with different temperature zones and different pressures, high air tightness of a full temperature zone from room temperature to extremely low temperature is ensured, the reliability and the automation degree of the dilution refrigerating machine are improved, and very positive significance is provided for practicability of a dilution refrigerating system.

The invention discloses a low-vibration long-service-life rotary split type Stirling cryocooler, relates to the technical field of cryocoolers, and aims to solve the technical problems that reciprocating movement of a single compression piston has rotary inertia force, and a connecting rod in the single compression piston swings during movement, so that large vibration is generated. Comprising a compressor body and an expansion machine body which are arranged in a split mode. The motion states of the two compression pistons can be the same all the time through the symmetrical centering crank sliding block mechanisms which are completely equal in size and weight, then the momentum of the compressor is balanced, and finally reciprocating and rotating inertia force of the crank sliding block mechanisms is completely eliminated, and only extremely small vibration is generated. And a compressor is assisted to generate periodic pressure wave driving, and a gas spring is formed by using a dynamic seal, so that the discharger and the gas spring supported by the discharger form a forced vibration system, the formed damping force can generate a proper phase difference, and finally, an effective refrigeration effect is generated.

The invention discloses an offshore multi-energy combined supply system based on constant-pressure compressed carbon dioxide energy storage and an operation method of the offshore multi-energy combined supply system. The system comprises a working medium storage device, a heat energy storage device, a charging process module, a gas-liquid conversion loop, a discharging process module, a cold energy supply module and a heat energy supply module. By improving the energy release process structure of the compressed carbon dioxide energy storage system, the pressure of high-pressure carbon dioxide is reduced to normal pressure after primary expansion, so that low-temperature cold energy is generated while power is generated, consumption of stored heat is saved, residual stored heat is used for heat supply, the comprehensive utilization rate of energy is increased, and combined supply of cooling, heating and power is achieved; the system further comprises an integrated thermally-driven combined cooling and power supply subsystem capable of switching power generation / refrigeration modes, organic Rankine cycle and jet refrigeration cycle are highly integrated, investment cost and space occupation are reduced, redundant heat energy is flexibly and efficiently converted into electric energy or cold energy, and the flexibility of multi-energy combined supply of the system is improved.

The invention provides a dilution refrigeration system adopting modularized parallel connection, and relates to the technical field of mK-level dilution refrigeration, the dilution refrigeration system comprises a plurality of dilution refrigeration units and a transmission pump set, the plurality of dilution refrigeration units share one transmission pump set, and each dilution refrigeration unit is characterized in that a 3He concentration phase and a 3He dilution phase are stored in a mixing chamber; the evaporation chamber is communicated with a 3He dilution phase and is used for separating 3He steam from the 3He dilution phase; the gas flow adjusting device is connected between the evaporation chambers and the transmission pump set, the transmission pump set extracts at least one part of 3He steam in each evaporation chamber, and the gas flow adjusting device partially receives the 3He steam output from the transmission pump set and at least partially liquefies the 3He steam received from the transmission pump set to form 3He fluid flowing back to the mixing chamber; the multiple gas flow adjusting devices of the multiple dilution refrigeration units adjust the pipe diameters of the respective gas pipelines correspondingly, so that the 3He fluid flowing back to the mixing chambers of the multiple dilution refrigeration units is subjected to the same resistance.

The invention discloses a low-temperature system with ultralow vibration. A small-sized low-temperature refrigerator is mounted in a closed damping heat exchange cavity in a vacuum manner; a sealing cavity is formed in the top of the small low-temperature refrigerating machine, and the two cavities are connected through a breather pipe to balance air pressure in the two cavities. A flow resistor and a heat exchange element are arranged in the cold box, a heat exchange pipe is arranged on the outer wall of the cavity heat exchanger, and a first inlet and a first outlet are formed in the two ends of the heat exchange pipe correspondingly. A second inlet communicated with an inner cavity of the closed damping heat exchange cavity is formed in the upper part of the closed damping heat exchange cavity; a first exhaust pipe is connected to the dilution unit; a first heat exchange coil pipe is arranged in the first exhaust pipe; the first inlet, the first outlet, the first heat exchange coil pipe, the flow resistor, the heat exchange element and the first exhaust pipe form a circulation loop; and a refrigerant is injected into the closed damping heat exchange cavity. It is guaranteed that the pressure in the damping heat exchange cavity is constant, and instability, caused by pressure fluctuation, of the heat exchange and damping effects is avoided.

The invention relates to a cold compressor and a dilution refrigerator adopting the cold compressor, the cold compressor comprises a driving part, an air cylinder and a piston, and further comprises a precooling refrigerator, the precooling refrigerator is connected with the air cylinder, and the compressor is precooled through the precooling refrigerator. The cold compressor can be used on a dilution refrigerating machine or a space dilution refrigerating machine, and compared with the prior art, the refrigerating machine is adopted for cooling the compressor, so that the compressor becomes the cold compressor, and therefore it is ensured that helium-3 is compressed at the low temperature.

An air conditioning system is provided. The air conditioning system includes an air compressor, a battery, a generator, a blower, and a turboexpander. The air compressor generates pressurized air from ambient air. The battery is for powering the air compressor motor. The generator is electrically connected to the battery. The turboexpander includes a drive shaft, a turbine wheel coupled to the drive shaft, and an expander coupled to the drive shaft. The pressurized air provides a source of kinetic energy to directly cause the turbine wheel to rotate and generate boosted air from the pressurized air, and the boosted air from the turbine wheel is configured to be received in the expander wheel and directly cause the expander wheel and the drive shaft to rotate together with the turbine wheel, thereby generating expanded and cooled air in the expander wheel.

A cryogenic cooling system is provided comprising a cryogenic refrigerator assembly and two or more connected modules. The cryogenic refrigerator assembly comprises one or more cryogenic refrigerators. Each said connected module comprises: a housing defining an internal volume for the module, the housing having a plurality of side faces, and a plurality of stages arranged within the internal volume for the module, wherein one or more of the plurality of stages is thermally coupled to the cryogenic refrigerator assembly. The two or more said modules are mutually connected at respective side faces, and a first said stage of a first said module is thermally coupled to a first said stage of a second said module.

The condensation pump type dilution refrigerating machine with the booster pump comprises the pre-cooling module and the dilution module, the pre-cooling module provides the required pre-cooling temperature for the dilution module, the dilution module uses the booster pump working at 1K, 3He circulation is achieved through cooperation of the booster pump and the condensation pump, no room-temperature circulation system is arranged, and therefore the dilution effect is good. And the defects of high heat loss and high compression power consumption in a room temperature circulation mode are overcome. Meanwhile, due to the fact that the booster pump is used, the system can obtain larger circulating flow so as to achieve larger cooling capacity, and the defect that a condensation pump type dilution refrigerator obtains large refrigerating power is overcome.

Non-flammable refrigerants with low GWP and secondary refrigerant systems including such refrigerants are provided. The refrigeration system may contain a high temperature refrigerant circuit with a first refrigerant and a low temperature refrigerant circuit with a second refrigerant, wherein the second refrigerant comprises a blend of R1234ze(Z), R1234ze(E), R1336mzz(E) and optionally R227ea, or a blend of R1234ze(Z) R1234ze(E) R1224yd(Z), and optionally R(227ea). The refrigerant fluids may have one of the following characteristics: (i) a global warming potential (GWP) of less than 150; (ii) an evaporator glide of less than 5.5° C.; (iii) non-flammability according to ASHRAE Standard 34; and / or (iv) a boiling point of less than 6° C.

The invention provides a pre-cooling system for a dilution refrigerator, and relates to the technical field of mK-level dilution refrigeration, the pre-cooling system comprises a vacuum chamber comprising a normal temperature plate and multi-level cold plates, the multi-level cold plates comprise a first-level cold plate, a second-level cold plate and a third-level cold plate, and the vacuum chamber is internally provided with a pre-cooling unit arranged between the normal temperature plate and the second-level cold plate; the plurality of thermal switches are respectively arranged between two adjacent cold plates between the first-stage cold plate and the third-stage cold plate, and comprise a first-stage thermal switch and a plurality of second-stage thermal switches; the first-stage thermal switch and the plurality of second-stage thermal switches have conduction states in response to the fact that the temperature of the mixing chamber is higher than different target temperatures and disconnection states in response to the fact that the temperature of the mixing chamber is lower than different target temperatures; the dilution refrigeration unit comprises a mixing chamber arranged on a third-stage cold plate; the first-stage thermal switch and the multiple second-stage thermal switches work in the on state or the off state in response to the temperature change of the mixing chamber, so that the pre-cooling unit is adjusted between a first-stage pre-cooling mode and a second-stage pre-cooling mode.

The invention provides a dilution refrigeration system not limited by gravity, and relates to the field of extremely-low-temperature dilution refrigeration. The dilution refrigeration system not limited by gravity comprises a first-stage pre-cooling device, a second-stage pre-cooling device, a capillary type dilution refrigeration device, a liquid pool circulating device, a dilution recovery device and a dilution air inlet device, wherein the first-stage pre-cooling device comprises a vacuum cover, a GM pulse tube refrigerator, a 40K-stage heat exchanger, a 40K-stage cold shield, a transition heat exchanger and a 4K-stage heat exchanger. Compared with a conventional dilution refrigeration system, the dilution refrigeration system not limited by gravity has the advantages that due to the fact that the multistage capillary tube heat exchanger is adopted, surface tension can be used for replacing gravity to fix a concentrated phase interface and a dilute phase interface, and refrigeration temperature is directly transmitted to a hot end component in a capillary tube winding mode and the like; the interference of a zero-gravity or anti-gravity environment on the conventional dilution refrigeration process is avoided from the source, the influence of the vibration of the refrigeration unit on the hot end is favorably reduced, and part of high-precision application occasions with strict requirements on free installation and vibration interference is met.

The embodiment of the invention provides a method for suppressing vibration disturbance of a photoelectric pod infrared assembly refrigerating machine, and relates to the technical field of automatic control, and the method comprises the steps: S1, estimating the current vibration frequency of the refrigerating machine; s2, selecting a band-pass filter according to the current vibration frequency of the refrigerator; s3, calculating a disturbance torque estimation value of the refrigerator on the platform according to the gyro angular velocity component after band-pass filtering; and S4, calculating a feedforward control quantity according to the obtained disturbance torque estimated value, and superposing the calculated feedforward control quantity on a feedback control quantity of the photoelectric pod stabilized platform. According to the method, the disturbance torque of the refrigerator to the platform can be estimated, and the influence of the vibration disturbance torque of the infrared refrigerator assembly is counteracted before the disturbance torque does not influence the stability of the platform. The method does not need to increase the cost and complexity of the system, and can be directly integrated into a stability control algorithm of the photoelectric pod, thereby greatly reducing the influence on a stable platform when the infrared refrigerator works, and obviously improving the stability precision of the photoelectric pod.

The invention discloses a compressed air graded freeze-drying system which comprises a refrigeration compressor, a condenser, a refrigeration heat regenerator, a high-temperature evaporator, a low-temperature evaporator and an air heat regenerator, compressed air is pre-cooled through the air heat regenerator and then sequentially enters the high-temperature evaporator and the low-temperature evaporator to be freeze-dried, and then the compressed air enters the high-temperature evaporator and the low-temperature evaporator to be freeze-dried. And finally, rewarming is conducted through the air regenerator. The pressure dew-point temperature of the dried air is set through a dew-point temperature controller, when the outlet air temperature pressure dew-point temperature is higher than a set value, the driving frequency of a refrigeration compressor is increased, the system refrigerating capacity is increased, and the driving frequency of the refrigeration compressor is reduced, and the system refrigerating capacity is reduced; by introducing the high-temperature evaporator and the refrigeration compressor with the air supply function, the design difficulty of a single evaporator is reduced, the heat exchange efficiency is enhanced, stable control over a low-pressure dew point is facilitated, the compression work of a refrigerant is saved, and the operation energy efficiency of the compressed air freeze drying system is improved.

The utility model relates to a small-sized low-temperature gas purification and pressure control device which comprises a particulate matter filter, a pressure buffer tank, a pressure controller, a purifier and a parallel gas conveying pipeline, the parallel gas conveying pipeline is divided into a gas inlet channel, a flow dividing channel, a purifying channel, a connecting channel, a refrigerating channel and a gas outlet channel through valve assemblies. According to the utility model, unnecessary parts are omitted, and only the particulate matter filter, the pressure buffer tank, the pressure controller, the purifier and the parallel gas conveying pipeline are reserved, so that the volume of the equipment is effectively reduced while the gas purity and the pressure stability are ensured, and the whole structure is more compact; and three different lines are arranged to carry out pipeline purging, gas leakage detection and gas conveying work respectively, so that normal operation of the refrigerating machine is guaranteed, the service life of a product is greatly prolonged, and the reliability of the product is greatly improved.

The utility model discloses a vibration reduction assembly and an extremely low vibration reduction system for an extremely low temperature refrigeration platform. The vibration reduction assembly comprises a main frame. The active suppression platform is arranged above the main frame, reads a signal in real time through a sensor in the active suppression platform and feeds back the signal to an internal control unit, and the control unit sends an instruction to reversely adjust the compression amount of an internal spring so as to realize active vibration reduction; the rotary valve vibration reduction mounting seat is used for respectively fixing the rotary valve motor and the phase modulation air reservoir through a supporting plate and a fixed clamping block and realizing vibration reduction through a vibration reduction element arranged in the rotary valve vibration reduction mounting seat; a second vibration reduction body is arranged in the corrugated pipe assembly so as to reduce vibration in the vertical direction and the radial direction. The active suppression platform is arranged to actively eliminate vibration, vibration or vibration transmission can be reduced, the corrugated pipe is arranged above the active suppression platform, vertical vibration of the cold head of the refrigerating machine can be reduced, the second vibration reduction bodies are arranged on the periphery of the corrugated pipe body, and radial vibration of the cold head of the refrigerating machine can be reduced through the second vibration reduction bodies.

The present application provides a two-phase cold plate liquid cooling system and a control method. According to the present application, for parts which are cooled in series by the two-phase cold plate liquid cooling system, after a first evaporator cools a previous part, on the basis of the heat transfer requirements of a part cooled by a second evaporator, the quality of a refrigerant output from the first evaporator is adjusted to prevent the quality of the refrigerant from being too low or too high, and thus the refrigerant entering the second evaporator has proper quality, namely, the refrigerant entering the second evaporator has proper boiling point and heat exchange capacity, so that corresponding parts can be cooled to proper temperature, and large temperature difference between upstream and downstream parts is avoided. The solution solves the problem of the temperature of downstream parts in the series being lower than the temperature of upstream parts in the series, improves the temperature uniformity of multiple parts cooled in series, and then solves the problems of pressure oscillation, circulation stagnation and circulation reverse flow in the system, greatly improving the temperature uniformity of heat sources connected in series and the reliability of a series-parallel system.

The invention provides a 3He internal circulation device for a dilution refrigerator and the dilution refrigerator, and relates to the technical field of dilution refrigerators. The dilution refrigerator is provided with a mixing chamber and an evaporation chamber, the 3He internal circulation device comprises at least one pair of circulation main bodies and a driving mechanism, the at least one pair of circulation main bodies are arranged between a first-stage cold disc and a second-stage cold disc which are distributed at intervals in the vertical direction, the temperature of the first-stage cold disc is located in a first temperature zone, and the temperature of the second-stage cold disc is located in a second temperature zone; each circulating main body has a first state in which the circulating main body moves downwards to be in contact with the second-stage cold disc, is cooled to a second temperature zone and adsorbs 3He steam from the evaporation chamber, and a second state in which the circulating main body moves upwards to be in contact with the first-stage cold disc, is heated to the first temperature zone and releases the 3He steam to the mixing chamber. The driving mechanism is suitable for driving the two circulating main bodies in each pair to move in the vertical direction so as to be switched between a first state and a second state, and the two circulating main bodies are kept in different states so as to form a 3He steam inner circulating passage.

The present disclosure is directed to devices, systems, and products for attracting, capturing and converting atmospheric water vapor into useful liquid water utilizing thermal dynamic processes such as deposition, phase change states and fusion.

The invention discloses a two-section compression type transcritical carbon dioxide heat pump system and a control method thereof. An outlet of a second compressor sequentially passes through a high-temperature heat exchanger and a flow divider and then is divided into two paths; wherein one path is communicated with an inlet of a first expansion machine through a heat flow stream inlet valve of the first heat regenerator, the hot side of the first heat regenerator and the hot side of the second heat regenerator, and the other path is communicated with an inlet of a second expansion machine through a heat flow stream inlet valve of the third heat regenerator and the hot side of the third heat regenerator in sequence; the outlet of the second expansion machine is communicated with the inlet of the mixer through the cold side of the second heat regenerator, the cold stream inlet valve of the first heat regenerator and the cold side of the second heat regenerator in sequence; an outlet of the first expansion machine communicates with an inlet of the mixer through the low-temperature heat exchanger, a cold stream inlet valve of the third heat regenerator, the cold side of the third heat regenerator and the first compressor, an outlet of the mixer communicates with an inlet of the second compressor, and the comprehensive energy efficiency of the carbon dioxide heat pump system can be improved.

Connection adapter for docking and undocking a maintenance station to a service valve of a third-party system in which a working fluid circulates in a closed circuit with a connection via which for filling working fluid under pressure can be fed from the maintenance station into the connection adapter or via which working fluid under pressure can be discharged, with a dead space which is ventilated via a venting path, the connection adapter includes a servo space in which a servo piston for opening and closing the venting path is accommodated, and a valve spindle that operates a valve element, and a hold-down device for opening a spring valve insert forming the service valve, which is designed and arranged in such a way that it only opens the spring valve insert after the servo piston has reached a position closing the ventilation path.

Systems and techniques that facilitate scalable cryostats and cryogenic systems are provided. In an embodiment, a cryogenic system can comprise a plurality of unit cells joined together, wherein each unit cell comprises: a trapezoidal-shaped frame, wherein frames from adjacent unit cells are connected in a vacuum-tight manner to form a continuous, global vacuum enclosure, and wherein the unit cells are capable of being horizontally removed from or inserted into the plurality of joined unit cells. Furthermore, each unit cell can comprise at least one temperature shell, wherein temperature shells from adjacent unit cells are connected to form a continuous, global temperature shell. Moreover, each unit cell can comprise at least one cryogenic payload located within the at least one temperature shell, that is cooled by at least one retrofitted version of a standard dilution refrigerator.