596 results about "Refrigeration compressor" patented technology

The invention provides an intelligent control method and system for a refrigeration house, and relates to the field of control. A refrigeration house space thermodynamic diagram model is constructed based on temperature measuring points, and a historical temperature sequence, a house door opening and closing state sequence, cargo warehouse-in and warehouse-out records and external environment parameters are obtained; predicting a temperature change track of each node in a future control time domain by using a space-time diagram convolutional network; establishing an equipment health state evaluation model based on a hidden Markov model, evaluating the health state of each refrigeration compressor unit and quantifying the health state into an equipment health index; and solving the rolling optimization objective function in the control time domain to obtain an optimal start-stop time sequence and operation power combination instruction of each refrigeration compressor unit and auxiliary equipment, and issuing the combination instruction to a corresponding field controller for execution. The temperature change of each area in the refrigeration house can be accurately predicted, the operation load can be reasonably distributed according to the health condition of the unit, the service life of equipment is effectively prolonged, and the sudden failure risk and the maintenance cost of the whole life cycle are reduced.

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 embodiment of the invention discloses a temperature regulation storage device. The temperature regulation storage device comprises a control module, a low-temperature storage module, a cooling module and a transportation module, wherein the low-temperature storage module comprises at least two low-temperature storage units; the low-temperature storage unit comprises a refrigeration compression mechanism, a storage pipe and a refrigeration pipeline, the refrigeration compression mechanism is connected with the refrigeration pipeline, and the refrigeration pipeline is connected with the storage pipe; the cooling module comprises a cooling box, a cooling sample bearing disc and a cooling mechanism, a cooling sample conveying pipe is arranged above the cooling module, a conveying hole is formed in the cooling box, the cooling box communicates with the cooling sample conveying pipe through the conveying hole, and the cooling sample bearing disc is located in the cooling box; at least one cooling sample bearing hole is formed in the cooling sample bearing disc, and each cooling sample bearing hole is used for bearing a sample; the low-temperature storage module, the cooling module and the transportation module are all in communication connection with the control module. The temperature regulation storage device can reduce the probability of sample damage.

The utility model provides a large-height-difference gravity liquid supply refrigerating system, which relates to the technical field of refrigerating systems and comprises a refrigerating compressor, an oil separator, a condenser, a first liquid storage device, an electric control valve, a gas-liquid separator, a heat exchanger, a second liquid storage device, a stop valve, a filter, a liquid supply electromagnetic valve, an electric control valve, an evaporator, a stop valve for a sensor and the sensor. The device comprises a micro gas-liquid separator, a stop valve, a one-way stop valve and a liquid level switch. According to the high-altitude-difference refrigerating system, the problems of energy consumption caused by a pump liquid supply mode adopted by a traditional high-altitude-difference refrigerating system and excessive refrigerant charge amount caused by multi-time liquid supply can be effectively reduced, and energy conservation and emission reduction are facilitated; the influence of a static liquid column of a large-height-difference gravity liquid supply system on heat exchange of the evaporator can be avoided; the refrigeration tail end adopts an oil-free cold carrying mode, so that the heat exchange efficiency of the evaporator can not be influenced by an oil film; in addition, gravity liquid supply is adopted in the system, the machine room can be arranged on the roof and does not occupy the storeroom volume, and the storeroom volume can be effectively increased.

The utility model relates to a thermal protector which is fast in disconnection and strong in bearing capacity. The thermal protector is mainly used for over-temperature rise and over-current protection of a refrigeration compressor or other motors. The heating device comprises a pin, a cover plate, a movable contact spring, a bimetallic strip, a first static pin, a second static pin, a heating body, a third static pin and a base, the two ends of the heating body are welded to the first static pin and the second static pin respectively, one end of the movable contact spring is electrically connected with the first static pin, the other end of the movable contact spring is matched with the third static pin, the pin is electrically connected with the third static pin, and the bimetallic strip is arranged on the base. The heating device is structurally characterized in that a loading cavity used for installing the heating body is formed in the base, a limiting table used for placing the heating body is arranged at the bottom of the loading cavity, the heating body is a spiral heating body or a planar heating body, and when the heating body is the spiral heating body, the limiting table is of a plurality of semicircular protruding structures. When the heating body is a planar heating body, the limiting table is arranged to be of a structure with two strip-shaped protrusions.

The invention discloses an intelligent start-stop control method and system for a magnetic suspension refrigeration compressor, and the method comprises the steps: obtaining a position perception enhancement source through collecting and analyzing the current response data of a magnetic bearing coil, and extracting the current response change characteristics; rotor position estimation is carried out based on current response change characteristics, a positioning precision driving source is extracted from estimation deviation, and a non-impact starting excitation current instruction is generated; a multi-sensor fusion data network is established, configuration is reconstructed through an abnormal response activation signal, and a degradation operation fault-tolerant mode is formed; converting a response preparation gain according to the shutdown instruction signal, performing shutdown state evaluation in combination with signal reconstruction configuration, and generating an emergency shutdown trigger condition; and the power supply state of a bus capacitor is detected, gradient control potential is released, the active damping control opportunity is determined, a damping force control instruction is generated, finally intelligent start-stop control over the magnetic suspension refrigeration compressor is achieved, and safe and reliable operation of the system under various working conditions is ensured.

The invention discloses a scroll compressor with an angle-adjustable gas folding sheet, and relates to the technical field of compressors, in particular to the scroll compressor with the angle-adjustable gas folding sheet. The angle-adjustable air folding sheet is arranged on the inner wall, right opposite to an air suction port of the refrigeration compressor, of a shell; the control structure is arranged right above the angle-adjustable air folding sheet; the external controller is connected with the control structure and the motor stator through wires, and the external controller receives the temperature of the motor stator so as to regulate and control the action of the control structure. When the compressor operates, a low-temperature and low-pressure refrigerant enters from the air suction port, flows through the angle-adjustable air folding sheet, enters the shell cavity, then enters the scroll plate structure, is compressed to a high-temperature and high-pressure state and is exhausted from the exhaust port. According to the technical scheme, the problems that in the prior art, an upper baffle is fixed at a large angle, and compressor faults are caused by insufficient motor cooling due to small refrigerant circulation amount are solved; and the upper baffle is fixed at a smaller angle, so that the motor is cooled too much due to the increase of the refrigerant circulation volume, and higher efficiency cannot be met.

The invention discloses an air source heat pump control method and device for a magnetic suspension refrigeration compressor. Adjusting deviation mapping is generated by constructing a temperature response curve and a load demand curve and executing relevance evaluation, an out-of-tolerance mismatch window is detected, and load sudden change characteristics are extracted to determine an adjusting period; positioning an overlapping section in an adjusting period, establishing a refrigerant flow distribution grid to identify a cooperative constraint degree, executing resource conflict identification, marking conflict positions, generating comprehensive weights, and arranging the comprehensive weights in a descending order to form a scheduling sorting table to recombine a compressor operation time sequence; adjusting capacity is preset and fused with a temperature response curve to form an adjustable power range, an area with insufficient margin is identified, margin compensation parameters are generated, and a dynamic adjusting limit is determined; the method comprises the following steps: performing time sequence splitting on environment temperature change based on a dynamic adjustment limit to generate a sudden change component and a slow change component, respectively generating a compressor speed regulation sequence and a heat exchanger adjustment sequence, fusing and establishing a control instruction, and realizing supply and demand accurate matching, resource conflict resolution and dynamic response optimization.

The present invention discloses a combined projection welding process for a refrigeration compressor housing, and discloses a method of combined welding of multiple workstations through one device and one process. For metal workpieces with different shapes, materials, positions, etc., the combined projection welding of the housing assembly is completed by performing one-time clamping and positioning welding on the housing through a combined projection welding device for the refrigeration compressor housing, which is easy to realize an automated projection welding production line; a combined projection welding device for a refrigeration compressor housing is also disclosed. By setting a combined power head with a combined power piston and a pushing device inside, an upper electrode seat and a lower electrode seat, the clamping and projection welding operations of multiple workpieces are realized simultaneously, effectively accelerating the production rhythm and improving production efficiency; by setting a combined power piston and multiple pushing devices at the tops of different upper electrodes, and lower electrodes with different depths at the lower electrode seat, the welding quality of simultaneous projection welding of different workpieces is improved, and the energy consumption and manufacturing cost of the device are reduced.

The technical scheme of the utility model discloses a heat source tower solution concentration maintaining and adding device which comprises a refrigeration compressor, a coil pipe type evaporation heat exchanger, an air cooler, a condenser and a gas-liquid separator which are sequentially connected, and a hot gas bypass electromagnetic valve is arranged between an inlet of the refrigeration compressor and an inlet of the condenser. The coil pipe type evaporation heat exchanger is arranged in the vacuum evaporation tank, and an outlet of the solution tank is sequentially connected with the liquid supplementing electromagnetic valve, the heat recovery plate type heat exchanger and a liquid inlet of the vacuum evaporation tank; a steam outlet of the vacuum evaporation tank is sequentially connected with a condenser and a purified water tank; an air outlet of the vacuum evaporation tank is connected with the purification water tank, the purification water tank is connected with a gas inlet of the vacuum ejector, and a liquid inlet and a mixed liquid outlet of the vacuum ejector are connected with the circulating water tank; an evaporation coil I is arranged in the circulating water tank, and an evaporation coil II is arranged in the purification water tank, so that the integration of low-temperature evaporation of the solution, system liquid supplement and solution recovery is realized, the solution purification efficiency is high, and the energy consumption is low.

The present invention relates to the technical field of compressor performance testing and testing equipment manufacturing. Disclosed are a system volume-adjustable device and method for evaluating the starting characteristic of a refrigeration compressor. The evaluation device comprises a sample under test, a test refrigeration system and a test control system. By means of controlling a high-pressure-end volume regulator, a low-pressure-end volume regulator and a condensing coil, the evaluation device precisely adjusts a refrigeration system volume, so as to match the test requirements of different compressors for the refrigeration system volume, and provide a volume-adjustable substitute refrigeration system for starting characteristic testing. The present invention synchronously collects transient characteristic parameters such as intake and exhaust pressure, inter-phase voltage, phase line current and housing vibration acceleration at the instant of a compressor start, and non-transient characteristic parameters such as the in-housing temperature of a variable-frequency driver, the temperature of a power module and the temperature of a rectifier bridge, so as to accurately measure and evaluate the starting characteristics of the refrigeration compressor in specific environments.

The utility model discloses a welding ceramic wiring terminal for a refrigeration compressor, which comprises a terminal board, a welding ceramic motor wiring terminal and a nut, the welding ceramic motor wiring terminal and the terminal board are welded and fixed, and the welding ceramic motor wiring terminal is composed of a double-thread wiring terminal, a ceramic welding seat, a ceramic tube and a metal sealing cap. Wherein the double-end thread binding post and the metal sealing cap, the metal sealing cap and the ceramic tube, and the ceramic tube and the ceramic welding seat are connected in a brazing manner, the surface of the ceramic tube is metalized at the welding position, and the two ends of the double-end thread binding post are respectively exposed out of the two end parts of the ceramic tube. And the terminal plate is electrically connected to an outgoing line and a power line of a motor winding, and is fixedly arranged on a shell of the refrigeration compressor. The wiring terminal of the refrigeration compressor can meet the requirements of creepage distance and electrical clearance when the voltage is higher, and can be used for the wiring terminal of the refrigeration compressor with higher power supply voltage.

The utility model provides a high-power charging station liquid cooling system, and particularly relates to the technical field of new energy automobile charging pile cooling systems, the high-power charging station liquid cooling system comprises a water tank, cooling liquid is pressurized by a cooling liquid water pump, passes through a flow meter and then is divided into two paths to respectively enter a battery and a charging liquid cooling cable for heat exchange and cooling, and the cooling liquid is cooled. A cooling liquid pressure sensor detects the pressure of the cooling liquid and adjusts the flow of the cooling liquid, so that the cooled cooling liquid flows out to a second Y-shaped pipe and enters the heat exchanger, a cooling fan cools the heat exchanger, a liquid return temperature sensor detects the temperature of the cooled cooling liquid, and a liquid supply temperature sensor detects the temperature of the cooled cooling liquid after heat exchange; in the process, no refrigeration compressor system works, electric energy is saved, and the operation energy efficiency of the new energy storage charging station battery and the charging liquid cooling cable system is improved.

The present invention discloses a portable refrigeration device for transporting red wine, and relates to the field of household red wine refrigeration. The portable refrigeration device for transporting red wine comprises a storage box, a refrigeration compressor, a plurality of extrusion units, a support unit, a plurality of adjustment units and a plurality of sealing units. The portable refrigeration device for transporting red wine clamps red wine bottles of different sizes through the extrusion unit to prevent the red wine from colliding due to shaking, and ensures the preservation of each bottle of wine stored in the storage box by transmitting the cold air generated by the refrigeration compressor through the main connecting pipe and the slave connecting pipe. The red wine cork is limited in the red wine bottle mouth by the sealing block contacting and extruding the red wine bottle mouth, ensuring the sealing effect of the red wine, pushing the limit plate to the center position, and limiting the red wine bottle mouth with the bottle body, so that the red wine limitation is more stable.

The invention relates to the technical field of refrigeration system automation and energy-saving control, and provides an intelligent power-saving control method and device for a centrifugal refrigeration compressor. The method comprises the steps that closed-loop control over the frequency of the frequency converter is conducted according to the current current of the compressor, and the pressure fluctuation allowable range is determined; target pressure is determined according to the target flow, and closed-loop control over the opening degree of the pressure regulating valve is conducted according to the target pressure and the pressure fluctuation allowable range; and closed-loop control over the opening degree of the expansion valve is conducted according to the target flow. The current, the pressure and the flow which are mutually associated are decoupled, the frequency converter is mainly used for controlling the flow, the pressure regulating valve is used for controlling the pressure, and the expansion valve is used for controlling the flow, so that orderly regulation of the current, the pressure and the flow is realized, and the pressure fluctuation allowable range is determined by using the current. And the pressure fluctuation allowable range is used for adjusting and controlling the opening degree of the pressure regulating valve, so that the pressure overshoot can be effectively reduced.

The invention relates to a pneumatic performance testing system for a centrifugal refrigeration compressor, which belongs to the technical field of refrigeration compressor testing and comprises a refrigeration pipeline communicated between an outlet of a second-stage centrifugal compressor and an inlet of a first-stage centrifugal compressor. A first adjusting valve CV1, a first gas cooler and a first electric heater are sequentially arranged on the refrigeration pipeline in the advancing direction of refrigerants, a second gas cooler is arranged on the middle pipeline, and a fourth adjusting valve CV4, a fifth gas cooler and a second electric heater are sequentially arranged on the air supplementing pipeline. According to the invention, the pressure and temperature of the refrigerant entering the first-stage centrifugal compressor can be adjusted, and the pressure and temperature of the refrigerant entering the second-stage centrifugal compressor can be adjusted, so that the refrigerant gas reaches the suction pressure and temperature required by the tested two-stage centrifugal refrigeration compressor; therefore, the performance of the two-stage centrifugal refrigeration compressor can be tested respectively, and the test effect of the high-speed centrifugal refrigeration compressor is improved.

The invention provides concentration equipment for waste hydrochloric acid purification and recovery, and relates to the field of waste hydrochloric acid purification, the concentration equipment comprises a concentration machine table, a supporting plate is mounted in the middle of the concentration machine table, a concentration tower is mounted above the supporting plate, a refrigeration compressor is mounted below the supporting plate, and the concentration equipment further comprises a condensation part, a stirring mechanism, a scraping mechanism and a driving mechanism. A driving motor works to drive a bevel gear II to be meshed with a bevel gear I, so that a hollow shaft pipe is driven to rotate, the hollow shaft pipe stirs and mixes a solution through stirring blades during rotation, the overall evaporation efficiency of the concentration tower is improved, and the bevel gear II synchronously drives a guide rail to move during rotation; when the guide rail moves, the balance rod moves in the retaining groove to keep the height unchanged, and moves upwards when moving in the swing groove, so that the ejector rod is driven to jack the lapping rod, the clamping block is clamped with the butt joint ring, and at the moment, when the stirring rod rotates, the butt joint ring and the scraper are driven to clean the interior of the concentration tower.

The utility model belongs to the technical field of refrigeration compressors, and discloses an air cylinder assembly, a compressor pump body and a compressor. An air cylinder cavity is formed in the center of the air cylinder body, and an air cylinder sliding piece groove is formed in the circumferential wall of the air cylinder cavity in the radial direction. At the notch end of the air cylinder sliding sheet groove, the joint of the groove wall of the air cylinder sliding sheet groove and the peripheral wall of the air cylinder cavity is of a fillet structure. The fillet structure is located on one side of an air suction cavity of the air cylinder cavity. According to the utility model, the local stress condition of the contact part between the notch of the cylinder slip sheet groove and the side wall of the slip sheet is improved, the friction condition of the matching part between the notch of the cylinder slip sheet groove and the side wall of the slip sheet is greatly improved, the lubrication condition between the cylinder slip sheet groove and the slip sheet is effectively improved, the friction loss and abrasion are reduced, and the service life is prolonged. Therefore, the mechanical efficiency of the cylinder assembly and the compressor pump body is improved, and the working performance of the compressor is ensured.

The invention provides a multi-grade waste heat grading recovery device for a poultry processing factory, and solves the technical problems that existing waste heat recovery equipment is mainly designed for single-grade and low-impurity-content waste heat resources and is difficult to adapt to feather drying waste gas with high impurities and exhaust temperature fluctuation of a refrigeration house compressor in a poultry processing scene. The device can be widely applied to the field of waste heat recovery equipment. The system specifically comprises a feather drying waste gas treatment system, a refrigeration house waste heat pressure stabilizing system and a comprehensive control system, wherein the feather drying waste gas treatment system comprises a cyclone separator and an electrostatic degreaser; a gas inlet pipe of the cyclone separator is communicated with a waste gas discharge pipe, waste gas enters from the tangential direction of the cylindrical section of the separator, and solid impurities are thrown to the wall of the separator and fall to a bottom ash hopper along the wall surface; the waste gas subjected to dust removal enters an electrostatic degreaser, a high-voltage electrode and a grounding polar plate are arranged in the degreaser, grease particles in the waste gas are ionized under the action of a high-voltage electric field, and the grease particles with negative electricity are adsorbed to the grounding polar plate.

The present disclosure relates to the technical field of compressor performance tests and detection apparatus manufacturing, and discloses a device and method for testing starting characteristics of a refrigeration compressor with adjustable system volume. The device includes tested samples, a test refrigeration system and a test control system. The testing device realizes accurate adjustment of volume of the refrigeration system by means of control of a high-voltage terminal volume adjuster, a low-voltage terminal volume adjuster and condensing coils, and matches test requirements of different compressors for the volume of the refrigeration system, such that a substitute refrigeration system with adjustable volume is provided for testing the starting characteristics.

The invention provides a magnetic suspension integrated energy-saving refrigeration compressor, and relates to the technical field of refrigeration equipment, the magnetic suspension integrated energy-saving refrigeration compressor comprises a main body assembly, and the two ends of the main body assembly are in threaded connection with volute assemblies; the two volute assemblies are connected through a gas-liquid circulation assembly, a magnetic suspension motor unit is installed in the main body assembly, an impeller assembly is in driving connection with the interior of the magnetic suspension motor unit, and a magnetic suspension control module and a motor monitoring module are installed on the two side walls of the main body assembly respectively. Full magnetic suspension supporting is adopted, mechanical friction is avoided, energy is saved, consumption is reduced, the service life of a unit is prolonged, and operation noise is reduced. The integrated structure is matched with the sealing piece, gas and liquid leakage is prevented, gas circuit and system circulation is optimized, and the refrigeration energy efficiency is improved. The stable and efficient operation of the compressor is guaranteed through the wear resistance of the impeller and real-time monitoring and regulation of the intelligent module.

The invention relates to the technical field of freeze-drying control, and discloses a freeze-drying control method and system based on dynamic parameter regulation and control and heat and mass transfer simulation. The method comprises the steps that a multi-point temperature sensor collects temperature gradient and mass change rate data; a chaos butterfly effect algorithm identifies a nonlinear transition point and predicts an ice crystal growth trend; evaluating the heat conductivity coefficient of the material, and dividing kernel, middle and surface regions; designing a differentiated cooling curve; and cooperative control instructions of the refrigeration compressor unit, the vacuum pump unit and the heating plate array are generated, and multi-stage cooperative control is achieved. The problems of uneven ice crystal distribution and material structure damage caused by extensive temperature control in a traditional building material freeze-drying process are solved.

The utility model belongs to the technical field of refrigeration compressors, and discloses a lower cylinder cover structure for a compressor pump body, the compressor pump body and a compressor. The lower cover body is of a cylindrical structure, and the outer diameter of the lower cover body is the same as that of an air cylinder. The lower end face of the lower cover body extends in the direction of a lubricating oil pool and is arranged close to the oil level of the lubricating oil pool. The lower cover body is designed to be of the cylindrical structure, the lower end face of the lower cover body extends towards the lubricating oil pool, the lower end of the lower cover body occupies the space above the lubricating oil pool, on the premise that the oil level of the lubricating oil pool is guaranteed, the space above the lubricating oil pool is reduced, the gathering amount of refrigerating working media is reduced, and the refrigerating efficiency is improved. The filling amount of the lubricating oil is reduced, meanwhile, the dissolving amount of the refrigerant in the lubricating oil liquid is effectively reduced, the filling amount of the refrigerant is effectively reduced, and the safety of equipment is improved.

The silencing cavity structure comprises an upper cavity, a lower cavity and a first partition plate arranged between the upper cavity and the lower cavity, an air inlet channel is formed in the outer side face of the lower cavity, and a snakelike communicating vessel assembly connected to the first partition plate is arranged in the lower cavity. The snakelike communicating vessel assembly comprises a snakelike communicating pipe and at least one second partition plate arranged on the snakelike communicating pipe, the second partition plate divides the lower cavity into a plurality of small cavities, the wall of one small cavity is connected with an air inlet channel, one end of the snakelike communicating pipe corresponds to the air inlet channel, and the other end of the snakelike communicating pipe is connected to the first partition plate. The air passes through each small cavity; a third partition plate is arranged in the snakelike communicating pipe in the bending path direction of the snakelike communicating pipe. The snakelike communicating pipe and the third partition plate are provided with notches in the space where the remaining small cavities are located. A fourth partition plate is arranged in the air inlet channel in the air inlet direction. By adopting the scheme, the noise reduction characteristic of the target frequency band can be improved under the condition that the air suction efficiency is not influenced.

The utility model discloses a scattered gas recycling and liquefying system, and belongs to the field of liquefying equipment. The system comprises a natural gas input pipeline, a first cold box, a second cold box, a first refrigeration compressor, a second refrigeration compressor, a third refrigeration compressor, a first JT throttle valve, a second JT throttle valve, a third JT throttle valve and a fourth JT throttle valve. The first refrigeration compressor, a third channel of the first cold box, a third channel of the second cold box, a third JT throttle valve, a second channel of the second cold box and a second channel of the first cold box are sequentially connected to form a loop; the second refrigeration compressor, a fifth channel of the first cold box, the second JT throttle valve and a fourth channel of the first cold box are sequentially connected to form a loop; a third refrigeration compressor, a seventh channel of the first cold box, a first JT throttle valve and a sixth channel of the first cold box are sequentially connected to form a loop; the natural gas input pipeline is sequentially connected with a first pipeline of the first cold box, a first pipeline of the second cold box and the fourth JT throttling valve. According to the utility model, the cost is reduced.

The invention provides an alkylation product separation system, a separation method, an alkylation process system and a method. A liquid phase discharge port of an isobutane fractionation device in the separation system is connected with a feed pipeline of an n-butane fractionation device through an isobutane tower bottom pump; the propane compression refrigeration device comprises an isobutane overhead condenser, a throttling expansion valve, a circulating water cooler, a refrigeration compressor and a refrigerant tank, the isobutane overhead condenser is arranged at the top of the low-temperature isobutane rectifying tower, and a gas phase at the top of the low-temperature isobutane rectifying tower is cooled and refluxed; a refrigerant liquid phase inlet of the isobutane overhead condenser is connected with a gas phase outlet of the refrigerant tank through the throttling expansion valve, the circulating water cooler and the refrigeration compressor in sequence, and a gas phase refrigerant of the isobutane overhead condenser is mixed with part of liquid phase of the throttling expansion valve through a pipeline and input into the refrigerant tank. The low-temperature isobutane rectifying tower adopting low-temperature heat supply at the tower bottom is combined with a high-energy-efficiency compression refrigeration system for cooling at the tower top, so that the separation difficulty is effectively reduced, the energy utilization rate is improved, and the separation energy consumption and the process cost are saved.

The invention discloses a multi-partition thermal vacuum environment test simulation system, which comprises a vacuum tank body, and is characterized in that a bottom plate mounting rack, a first bottom plate frame and a second bottom plate frame are arranged in the vacuum tank body; a first low-power liquid-cooled temperature control plate, a first high-power liquid-cooled temperature control plate and a first radiant heat cage small cabin are mounted on the first bottom plate frame; a second low-power liquid-cooled temperature control plate, a second high-power liquid-cooled temperature control plate and a second radiant heat cage small cabin are mounted on the second bottom plate frame; expansion plate type auxiliary heat sinks are arranged on the first bottom plate frame and the second bottom plate frame; the temperature controller in the multi-zone thermal vacuum environment test simulation system provided by the invention has the advantages that according to the temperature control requirement of each zone, two sets of refrigeration compressors arranged in the temperature controller enable each temperature control zone to have independent temperature control capability; the technical problems that the temperature of each temperature zone in a thermal vacuum environment test multi-partition structure of a spacecraft part and assembly single-machine satellite-borne traveling wave tube amplifier in the prior art cannot be independently controlled, and the zones interfere with each other in the control process are solved.

The utility model relates to the technical field of centrifugal refrigeration compressors, in particular to a multistage compression magnetic suspension centrifugal compressor with an independent rotating speed. The compressor comprises a flange plate, a first-stage motor and a second-stage motor, the first-stage motor and the second-stage motor operate independently, the two sides of the flange plate are fixedly connected to one end of the first-stage motor and one end of the second-stage motor, and the first-stage motor and the second-stage motor basically extend in the direction of a first straight line L1; a first-stage impeller and a second-stage impeller are respectively arranged in the first-stage motor and the second-stage motor, and the number of the first-stage impeller and the number of the second-stage impeller are respectively one or a plurality of the first-stage impeller and the second-stage impeller which are connected in series. According to the compressor, adjustment of different rotating speeds of the first-stage motor and the second-stage motor of the compressor can be achieved, adjustment of optimal inter-stage pressure of the compressor under the large pressure ratio is achieved, the optimal isentropic compression efficiency is achieved, and then the energy-saving effect is achieved.

The invention provides a test device and method for measuring the heat exchange performance of a thermosyphon evaporator, and belongs to the technical field of heat exchangers. The device comprises a refrigeration compressor, an oil-gas separator, a high-pressure condenser, a cooling tower, a circulating water tank, a circulating water pump, a liquid reservoir, a gas-liquid separator, a thermosyphon evaporator, a secondary refrigerant water tank, a secondary refrigerant pump and a mixing tank which are communicated with one another, and monitoring the measuring instrument for the test according to a specified time interval and recording data through the computer, and calculating the total heat transfer coefficient of the thermosyphon evaporator. By adjusting the height of the gas-liquid separator and utilizing the ratio of the mass flow measured at the liquid inlet of the thermosyphon evaporator to the gas mass flow of the gas-liquid two-phase flow measured at the gas outlet of the thermosyphon evaporator, the refrigerant circulation multiplying power under different liquid column static pressure heads is measured and calculated, and better test data support can be provided for the pipeline design of the thermosyphon evaporator.

Processes, systems, and apparatus are provided for producing a compressed process gas comprising light olefin such as ethylene. The process utilizes a pyrolysis reactor to produce the process gas. A power generator utilizes a turbine operated based on an Allam cycle to produce shaft power for operating one or more compressors involved in processing of the process gas while producing a reduced or minimized amount of CO2 that is released as a low-pressure gas phase product. Examples of using the shaft power for processing of the process gas can include compressing the process gas a process gas compressor powered by the produced shaft power and cooling the process gas using a refrigeration compressor powered by the produced shaft power.