765results about "Compression machines" patented technology

The invention relates to the technical field of dilution refrigerators, in particular to a liquid-helium-free dilution refrigerator with a rapid precooling inner cavity structure, which comprises a first rack and a second rack, a top plate is fixedly mounted at the top of the second rack, a top cover is fixedly arranged on the top plate, and a shell assembly is fixedly mounted at the bottom of the top cover. A multi-layer vacuum cavity assembly used for providing a vacuum environment is arranged in the shell assembly, a dilution refrigeration unit and an inner cavity mechanism assembly are arranged on the multi-layer vacuum cavity assembly, and the inner cavity mechanism assembly, the top cover and the multi-layer vacuum cavity assembly are jointly provided with an adjustable inflation and deflation mechanism used for adjusting an air inlet and outlet mode. Through cooperative use of the driving mechanism and the step-by-step regulation and control assembly in the adjustable inflation and deflation mechanism, switching of air inlet and outlet modes is achieved, mode switching of air inlet and outlet through a single through hole and simultaneous air inlet and outlet through multiple vent holes is achieved, and different working modes can be conveniently switched according to actual needs.

[Problem] Reduction of the stirring resistance that arises in a motor in a coolant circulation system in which an oil-containing coolant circulates to cool and lubricate the motor.[Means of solution] A coolant circulation system 100 comprises: a motor 4 with a rotor 41, a stator 42, a rotating shaft 43 and plain bearings 44; a gas-liquid separator 12, which separates a coolant into CO2 and oil; a CO2 passage 22b, through which the CO2 separated by the gas-liquid separator is supplied to a gap between the rotor and the stator to cool the rotor and the stator; mixing channels 24a, through which a mixture of the CO2 and the oil, obtained by mixing the CO2 and the oil separated by the gas-liquid separator, is supplied to gaps between the rotating shaft and the plain bearings to lubricate the plain bearings; and mixing channels 24b, through which the CO2 supplied to the rotor and the stator from the CO2 channel 22b and the mixture of CO2 and oil supplied to the sliding bearings 44 from the mixing channels 24a are returned to the gas-liquid separator.

The utility model provides a carbon dioxide heat pump control cabinet self-cooling system which comprises a carbon dioxide heat pump loop which comprises a compression device, a cooling device, a throttling device and an evaporation device which are mutually connected through a first pipeline, carbon dioxide is cooled to a preset temperature area in the cooling device, and the cooling device is provided with a first inlet and a first outlet; the compression device comprises a second inlet and a second outlet. The carbon dioxide heat pump loop further comprises a first section located between the first outlet and the second inlet and a second section located between the second outlet and the first inlet. And the cooling loop comprises a control cabinet heat exchange part and a second pipeline, the control cabinet heat exchange part is connected between the first outlet and the second inlet through the second pipeline and connected with the first section in parallel, and the control cabinet heat exchange part is used for making contact with the control cabinet for heat exchange. Based on the working loop of the carbon dioxide heat pump, the cooling loop is added, and the control cabinet is effectively cooled by utilizing the high-efficiency heat exchange characteristic of the carbon dioxide heat pump.

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.

The utility model discloses a heat management integrated module for a refrigerant side, a propane refrigerating system and a vehicle. The module comprises an integrated runner plate on which a compressor, a water-cooled condenser, a liquid storage drying tank, an electronic expansion valve and a battery cooling heat exchanger are integrated. Refrigerant circulates among all the components through a first flow channel, a second flow channel and a third flow channel which are independently arranged in the flow channel plate. By adopting the integrated design, the refrigerant leakage risk is remarkably reduced, the system size is effectively reduced, the space is saved, the heat management performance is improved, and key support is provided for safe application of the propane refrigeration technology.

The invention discloses a regenerative cryogenic helium circulating refrigerating system which comprises a vacuum cold box (1), a circulating fan (2), a valve box (3) and a low-temperature vacuum hose (4), the circulating fan is connected with the valve box through a pipeline, the vacuum cold box is connected with the valve box through a connecting pipe, a cold box flange (11) is arranged at the top of the vacuum cold box, and the low-temperature vacuum hose (4) is arranged in the cold box flange. One end of the low-temperature vacuum hose is arranged on the cold box flange and penetrates into the cold box cavity, the other end of the low-temperature vacuum hose is connected with the user load, at least one refrigerating machine is arranged on the flange, the circulating fan is used for pumping helium into the valve box in a circulating mode, and after the helium is cooled through the vacuum cold box, the user load is cooled through the low-temperature vacuum hose. According to the system, cold energy regenerative heat recycling during air returning can be achieved, the heat exchange efficiency of the system can be remarkably improved through the innovative design of the coil pipe type heat exchanger and the cold head heat exchanger, low-temperature refrigeration with the minimum of 10K can be achieved under the condition that no external cold source such as liquid nitrogen exists, and a solution is provided for the frontier fields such as nuclear fusion and the superconducting technology.

The utility model discloses a carbon dioxide internal defrosting system which comprises a carbon dioxide circulation loop and an internal defrosting liquid return pipeline, the carbon dioxide circulation loop and the internal defrosting liquid return pipeline are formed by connecting pipelines, the carbon dioxide circulation loop conducts compression refrigeration circulation, and the internal defrosting liquid return pipeline conducts low-temperature defrosting circulation. The internal defrosting liquid return pipeline further comprises a second electromagnetic valve, a third electromagnetic valve and a check valve on the basis of the carbon dioxide circulation loop, the second electromagnetic valve is arranged on the connecting pipeline and connected with the electronic expansion valve in parallel, and a liquid return pipeline connected with the carbon dioxide liquid storage device through the third electromagnetic valve and the check valve is arranged at an outlet of the low-temperature air cooler. The device does not consume electric energy, and is energy-saving and environment-friendly; no risk exists in long-time defrosting, and safety and reliability are achieved; and the defrosting time is short, the defrosting heating area is large, and the defrosting efficiency is high.

A superconducting equipment cooling device includes a cryocooler that cools superconducting equipment, an interface configured to receive a selection of a plurality of performance parameters of the cryocooler by a user and generate an operation mode setting representing the selected plurality of performance parameters, and a controller configured to receive the operation mode setting from the interface and control a plurality of operation parameters of the cryocooler that affect the selected plurality of performance parameters.

A cryostat comprises a vacuum enclosure (101) and, inside said vacuum enclosure, a plurality of nested radiation shields (102, 103). Stages of a cryogen-free cooling system (104) are thermally coupled with and configured to cool respective ones of said plurality of nested radiation shields (102, 103). Inside said vacuum enclosure (101) is a thermally conductive layer (201), at least partly surrounding said plurality of nested radiation shields (102, 103). A compressor-driven refrigerator (202) is thermally coupled with said thermally conductive layer (201) and configured to cool said thermally conductive layer (201).

A geothermal system exchanges heat between ground which receives geogenic heat 1 from below and a target 7, comprises a continuous loop of heat exchange tubing 3 placed in a region of the ground and s

The utility model discloses a heating and drying device for impregnated fabric production, belongs to the technical field of impregnated fabric production, and aims to solve the technical problems that although a heating and drying device in the prior art can dry moisture in impregnated fabric, an adhesive layer in the heated impregnated fabric can be softened, and the adhesive layer is damaged. And the impregnated cloth is adhered to the surface of the guide roller in the conveying process after being dried, so that the quality of the impregnated cloth is influenced. Comprising a base, a drying box is fixedly connected to the right end of the upper side of the base, a cooling box is fixedly connected to the left end of the upper side of the base, conveying mechanisms are arranged at the left end and the right end of the upper side of the base, and a scraping mechanism is installed at the position, located on the right side of the drying box, of the upper side of the base; drying mechanisms are arranged at the inner ends and the outer ends of the drying box and the cooling box, each drying mechanism comprises an upper communicating pipe fixedly connected to the upper end and the lower end in the drying box, and air outlet pipes are fixedly connected to the adjacent ends of the upper communicating pipes at equal intervals.

The oil-electricity hybrid aero-engine comprises a tail nozzle and an outer duct, and further comprises a motor and an electronic cooling loop, the system comprises a thermoacoustic engine and a first thermoacoustic heat pump, the thermoacoustic engine is arranged at the tail nozzle and used for absorbing heat of tail gas at the tail nozzle, and the first thermoacoustic heat pump is arranged at the tail nozzle and used for absorbing heat of the tail gas at the outer duct. Sound power is output; the first thermo-acoustic heat pump comprises a first cold-end heat exchanger, a first heat regenerator and a first hot-end heat exchanger, the first cold-end heat exchanger is used for absorbing heat to form a low-temperature area and is used for cooling the electronic cooling loop, part of heat is transmitted to the first hot-end heat exchanger through the first heat regenerator by utilizing acoustic power, and the first hot-end heat exchanger releases heat to the outer duct. The system utilizes a thermo-acoustic energy conversion technology to enhance the cooling of electronic parts, and can also recover tail gas waste heat to convert the tail gas waste heat into heat with a higher temperature level.

The invention relates to a thermoacoustic machine (1) comprising a control device (14) configured to modulate the acoustic power generated by one or more acoustic sources (6-9) so that the temperature of an external source (2) connected to one or more thermoacoustic cells (10-13) of the machine (1) reaches or remains substantially the same as a setpoint temperature. Figure for the abstract: Fig. 1

The invention discloses a pulse tube refrigeration device based on a semiconductor refrigeration ring. The device comprises a compressor, a precooler, a heat regenerator, a cold-end heat exchanger, a pulse tube, a hot-end heat exchanger, a reducing cavity, an adjusting tube and an air reservoir which are communicated in sequence. The semiconductor refrigeration sleeve is arranged outside the heat regenerator, and the surfaces of the semiconductor refrigeration sleeve and the heat regenerator are tightly attached. The semiconductor refrigeration sleeve is formed by overlapping a plurality of annular semiconductor refrigeration sheets, the hot surface of each semiconductor refrigeration sheet faces upwards, the cold surface of each semiconductor refrigeration sheet faces downwards, and the cold and hot surfaces of every two adjacent semiconductor refrigeration sheets are connected through heat-conducting silicone grease. Temperature sensors are arranged at the top and the bottom of the semiconductor refrigeration sleeve to monitor the temperature difference in real time, and the control system adjusts the input current of the semiconductor refrigeration piece and adjusts the refrigeration power of the semiconductor refrigeration piece. Through the stacked structure of the semiconductor refrigeration rings, step-by-step reduction of the temperature is achieved, the cooling efficiency is remarkably improved, and accurate temperature control can be conducted. The device is compact in structure, high in reliability and suitable for the working environment with the high requirement for equipment stability.

A process for conversion of a first refrigeration system including a first medium temperature circuit and a first low temperature circuit configured to circulate a synthetic refrigerant to a second refrigeration system includes replacing the first low temperature circuit with a second low temperature circuit by adding a heat exchanger to the first refrigeration system such that the second low temperature circuit is in a heat exchange relationship with the first medium temperature circuit, replacing a condenser of the first medium temperature circuit with a gas cooler, and connecting the second low temperature circuit to the first medium temperature circuit via pipe connections such that the low temperature compressor is fluidly connected to a medium temperature compressor of the first medium temperature circuit.

The utility model discloses a steelmaking continuous casting machine waste heat recycling device which comprises a conveying pipe and a heat exchanger, an annular blocking plate is arranged at the casting blank inlet end of the conveying pipe, a plurality of annular cavities are sequentially formed in the conveying pipe at intervals from the casting blank inlet end to the casting blank outlet end, and each annular cavity is connected with a cold air pipe. A plurality of air nozzles are uniformly distributed on the circumference of the side wall of the side, facing the annular blocking plate, of the annular cavity, cooling cavities are formed between the adjacent annular cavities and between the annular blocking plate and the annular cavities, a plurality of conveying rollers are arranged in the cooling cavities, an exhaust pipe is arranged on the side wall of the side, close to the annular blocking plate, of the cooling cavity, and a heat exchange pipe assembly is arranged in the heat exchanger. The exhaust pipe is communicated with an inlet of the heat exchange pipe assembly, a water supplementing opening is formed in the heat exchanger, an air compressor and a vortex tube which are communicated are arranged on the outer side of the conveying pipe, and a cold air outlet of the vortex tube is communicated with the cold air pipes. In conclusion, the casting device has the advantages of being small in heat loss, high in casting efficiency and high in heat recovery rate.

The invention discloses a method for releasing liquid carbon dioxide in the technical field of high-pressure pipeline safety release, which is used for a refrigerating system and comprises the following steps of: reducing the flow rate of carbon dioxide entering a well and releasing the carbon dioxide in the well based on the liquid level of a gas-liquid separation tank and the inlet pressure of a throttling and pressure reducing device; the compression power is reduced along with the reduction of the pressure of the air return port of the combined cooling and heating device; after the device is shut down, the carbon dioxide release rate of the lifting well is reduced, and gas return is stopped; when the pressure of the carbon dioxide outlet of the heat exchanger is reduced to a threshold value, discharging is stopped; when the system pressure is balanced, the carbon dioxide in the well is released. The flow of carbon dioxide entering the well is reduced based on the liquid level of the gas-liquid separation tank and the pressure of the throttling and pressure reducing device, well rising carbon dioxide is released, the compression power of the combined cooling and heating device is coupled with the pressure of an air return port, then releasing is stopped, global releasing is conducted after the system pressure is balanced, and the risks of dry freezing, freezing and valve freezing are eliminated; and the discharge safety and the system stability are improved.

The invention provides a double-refrigeration device applied to high-temperature superconducting magnetic fluid propulsion, and relates to the technical field of high-temperature superconducting magnet cooling, the device comprises a magnet Dewar, a magnet liquid nitrogen cylinder, a fixing assembly and a conduction refrigeration system; the magnet liquid nitrogen cylinder is located in the magnet Dewar, one end of the fixing assembly is fixed to the side portion of the magnet liquid nitrogen cylinder, and the other end of the fixing assembly is fixed to the magnet Dewar; dewar protrusions are arranged on the circumferential side wall of the magnet Dewar, and the conduction refrigeration system is installed on the Dewar protrusions and exchanges heat with the superconducting magnet coil in the magnet liquid nitrogen cylinder. The superconducting magnet coil is also provided with a wiring port. The dual-refrigeration device provided by the invention breaks through the dilemma that the critical current cannot be tested after packaging, the liquid nitrogen cooling unit can independently, quickly and uniformly cool the packaged magnet, and the detachable sealing wiring port is arranged, so that the performance verification after packaging is realized, and the quality blind area is eliminated.

The application discloses a cold-heat-electricity-hydrogen-carbon co-production system and method based on cross-critical carbon dioxide energy storage, and the method is as follows: carbon dioxide is compressed by a carbon dioxide compressor set and then enters an expander set to work and generate electricity; heat energy generated in the carbon dioxide compression process provides heat for a methanol water vapor reforming hydrogen production process and a methanol cracking hydrogen production process through a first heat exchanger and a second heat exchanger respectively; a solar power generation unit generates electricity to provide electric energy for the carbon dioxide compressor set, a methanol water vapor reforming hydrogen production reactor and a methanol cracking hydrogen production reactor; carbon dioxide generated in the methanol water vapor reforming hydrogen production is input into the carbon dioxide compressor set; carbon monoxide generated in the methanol cracking hydrogen production is combusted to generate high-temperature flue gas, and the high-temperature flue gas provides heat for the expansion of compressed carbon dioxide in the expander set; the carbon dioxide compression provides heat energy for a hydrogen production reaction of methanol, and solar power generation provides electric energy for the hydrogen production of methanol, so that the system energy consumption is reduced, and carbon monoxide is consumed in the system.

This disclosure describes systems, methods, and apparatus for improving the cooldown time, or efficiency of cooling systems, for a low-frequency one or multi-stage pulse-tube refrigerator. More specifically, actuation is performed on the driving frequency of the oscillating pressure and flow, on flow resistance of valves in the acoustic network that terminate the LF-OPTR or LF-DIPTR, and / or on the asymmetric flow resistance of the bypass valves in a LF-DIPTR's flow network. The actuation of these parameters is informed by measurements of the output pressure or output-input differential pressure at the steady flow compressor, the temperature of each stage of the refrigerator, and the temperature difference between the final stage and upper stages of the refrigerator, to name a few non-limiting examples.

The invention belongs to the field of low-temperature structures of refrigerating systems, and particularly relates to a vehicle-mounted low-temperature refrigerating system suitable for cooling a superconducting magnet. Comprising a GM-JT refrigerating machine, a liquid helium and liquid nitrogen refrigerant storage, filling and exhaust system and a frame system. The GM-JT refrigerating machine is used for realizing closed-loop operation of liquid helium; the liquid helium and liquid nitrogen refrigerant storage, filling and exhaust system is used for meeting the refrigeration requirement of the magnet; and the Dewar cylinder is used for integrating, insulating heat and supporting the equipment. The problems that in the prior art, a refrigerating machine is small in refrigerating capacity, low in operation efficiency and large in space size are solved.

According to an embodiment, there is provided a regenerator material including an intermetallic compound represented by a compositional formula EraFebSi100-a-b (where 15≤a≤25, and 35≤b≤45), the intermetallic compound including a crystalline phase with a ThCr2Si2-type crystal structure as a main phase, and the crystal grain size of the main phase being 0.001 mm or more and 1 mm or less.

The application discloses a transcritical CO2 ultra-high temperature heat pump system and a temperature control method, wherein supercritical CO2 is a high-temperature and high-pressure fluid at the outlet of a gas cooler, throttles to an evaporation pressure, and a large amount of throttling loss exists, which leads to the decrease of the heating energy efficiency ratio of the transcritical CO2 heat pump system, and is not conducive to the best energy-saving benefit of the ultra-high temperature heat pump. In view of the above problems, the application innovatively couples gas-electric dual-drive technology, two-stage compression intermediate cooling technology and mechanical supercooling technology, which can effectively reduce the high-pressure fluid temperature before the throttling valve of the CO2 working medium, reduce the throttling loss, drive the supercritical compressor through the adjustable turbine expander, reduce the power consumption of the compressor, improve the heating energy efficiency of the CO2 heat pump system, and flexibly and efficiently and stably supply steam in a wide range of variable working condition adjustment, improve the full working condition operation efficiency, achieve the purposes of energy saving and emission reduction and production cost reduction, and further widen the application range and application prospect of the high-temperature heat pump system.

The application discloses an air conditioner control method and device, an air conditioner and a storage medium, and belongs to the technical field of air conditioners. The application obtains the discharge pressure and the return air pressure of the compressor; controls the operation of the flow regulating device according to the discharge pressure and the return air pressure, detects the discharge pressure and the return air pressure of the compressor in real time, then adjusts the flow regulating device according to the detected discharge pressure and return air pressure, adjusts the flow regulating device, and effectively avoids the situation that the compression ratio of the compressor is increased, further protects the compressor, and prolongs the service life of the compressor.

In order to solve the problem that waste heat cannot be fully utilized due to the fact that an existing jet refrigeration device adopts a single steam generator, the device utilizing the waste heat to refrigerate comprises a plurality of steam generators, and the steam generators are sequentially connected in series. Each steam generator is further connected with an ejector, and the ejectors are connected through a cooler. The multiple steam generators are sequentially connected in series, flue gas waste heat can sequentially pass through the multiple steam generators, in this way, each steam generator can generate steam through the flue gas waste heat, the multiple steam generators can generate steam of different temperatures and pressure grades, and due to the fact that each steam generator is connected with the corresponding ejector, the steam of different temperatures and pressure grades can be generated. Therefore, steam with different temperatures and pressure grades generated by the multiple steam generators can be used as a power source of the multi-stage ejector, waste heat can be recycled to the maximum extent to generate steam, and the recycled steam with different pressures is fully used as an ejection power source.

The present invention relates to a turbo-compressor assembly of a chiller, comprising a compressor I, an electric motor III and a turbo-expander II arranged in a common housing, the common housing comprising a compressor body 19, an electric motor body 21, a turbo-expander body 20 and a shaft 13 mounted in the common housing in gas bearings opening the supply of working gas from the turbo-compressor assembly, the compressor impeller 1, the turbo-expander turbine impeller 5 and the electric motor rotor 8 being fixedly mounted on the shaft 13, the compressor impeller 1 and the turbine impeller 5 being arranged at opposite ends of the common shaft and the electric motor rotor 8 being arranged between them. Between the compressor impeller 1 and the rotor 8 of the electric motor, a shaft 13 is mounted in a first radial dynamic pressure gas bearing 101; between the turbine impeller 5 and the rotor 8 of the electric motor, a shaft 13 is mounted in a second radial dynamic pressure gas bearing 102; between the second radial dynamic pressure gas bearing 102 and the turbine impeller 5, a shaft is mounted in a thrust dynamic pressure gas bearing 11; an inlet for a secondary flow S2 of working gas of the turbo-compressor assembly to the first radial bearing 101 is formed between the inner wall of the body 19 of the compressor I and the shaft 13; and an inlet for a secondary flow S3 of working gas to the second radial bearing 102 and the thrust bearing 11 is formed between the inner wall of the body 20 of the turbo-expander II and the shaft 13.

On-chip cryostat and method, in particular for providing one or more quantum elements, comprising a substrate; a layer structure arranged on the substrate, wherein a sample, in particular a quantum element, can be arranged on a sample surface on the side of the layer structure opposite the substrate, and a vacuum housing surrounding the layer structure; wherein the layer structure comprises at least one ADR layer.

An energy efficient heating, ventilating, air conditioning, and refrigeration (HVAC&R) system (100) includes a conditioning fluid circuit (102) configured to direct a conditioning fluid to a load (106) to condition the load, a mechanical cooling system (30) configured to direct a working fluid therethrough, where the mechanical cooling system (30) is configured to place the working fluid in a first heat exchange relationship with ambient air and to place the working fluid in a second heat exchange relationship with the conditioning fluid, and a free-cooling system (104) configured to direct a chilled fluid therethrough. The chilled fluid includes potassium formate or aqua ammonia, and the free-cooling system (104) is configured to place the chilled fluid in a third heat exchange relationship with the conditioning fluid.

A system and method for increasing the refrigeration capacity of a direct expansion refrigeration system having an inlet separator and a liquid ejector to increase the endothermic capacity by increasing coil liquid refrigerant flow while ensuring that the evaporator outlet flow is in a liquid-free state and maintains a small amount of superheat. The increase in liquid refrigerant flow is accomplished by locally recirculating liquid from the coil outlet to the coil inlet by an ejector that pumps unvaporized liquid refrigerant from a lower pressure (suction pressure) to a higher pressure. The driving force of the ejector is derived from the saturated or supercooled liquid after the expansion valve.

A cryogenic cooling system is provided comprising one or more heat exchangers 200 that are thermally coupled to a target assembly 11-13 and fluidly coupled to a helium refrigeration plant. Each heat exchanger 200 comprises a stack of plates 208, wherein the plates are profiled to form channels 212 between each adjacent plate, the channels 212 for conveying supercritical helium between an inlet 202 and an outlet 204 of the heat exchanger 200.