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Motor, compressor and refrigeration equipment
ActiveCN120750120ACompressorRotary/oscillating piston combinations for elastic fluidsElectric machineRefrigeration
The invention discloses a motor, a compressor and refrigeration equipment, and relates to the technical field of refrigeration equipment, two end points on the bottom wall of the same magnetism adjusting groove are respectively a point C and a point D, the arc length of the shortest arc between the point C and the point D and taking the circle center of a rotor punching sheet as the circle center is Sr, the number of poles of a rotor is 2P, the included angle between the first groove wall and the center line of the magnetic steel groove of the corresponding group is alpha, the average angle number of each pole of the rotor is beta, the two end points of the two ends of the side wall of the side, facing the air gap, of the tooth shoe part are a point A and a point B respectively, the arc length of the shortest arc, with the circle center of the stator as the circle center, between the point A and the point B is St, 1.28 mm < = 1.56 mm, and 0.4 degree < = 1.56 mm. According to the technical scheme provided by the invention, the torque ripple of the motor is reduced, the noise of the motor is reduced, and the energy efficiency of the motor is improved.
Owner:GUANGDONG MEIZHI COMPRESSOR
Motor, compressor and refrigeration equipment
ActiveCN120675375ACompressorRotary/oscillating piston combinations for elastic fluidsElectric machinePermanent magnet motor
The invention discloses a motor, a compressor and refrigeration equipment, and relates to the technical field of permanent magnet motors, stator teeth and stator slots on the inner circumference of a stator core are alternately distributed, windings are arranged in the stator slots, the number of the stator slots is Q, the diameter of the maximum outer circle contour of the stator core is D1, the diameter of the maximum circle contour defined by the slot bottoms of the plurality of stator slots is D2, the diameter of the minimum inner circle outline of the stator core is D3, the rotor is rotatably mounted in the stator, the number of pole pairs of the rotor is P, and GCD (Q, P) * (D1-D2) / 2) / ((D1-D3) / 2) is greater than or equal to 1.4 and less than or equal to 2.6, and ((D2-D3) / 2) / (D3 / 2) is greater than or equal to 0.3 and less than or equal to 0.42, and GCD (Q, P) is the largest common divisor of Q and P. The technical scheme provided by the invention aims at balancing the rigidity and temperature of the stator, and ensuring the low-noise operation of the motor and the operation reliability of the motor at the same time.
Owner:GUANGDONG MEIZHI COMPRESSOR
Magnetic bearing system, compressor, and refrigeration device
A magnetic bearing system (100) includes a rotary shaft (101) and a magnetic bearing (105, 107, 130) having an electromagnet coil (106, 108, 108B, 135, 136). One end of the electromagnet coil (106, 108, 108B, 135, 136) is connected to the neutral point of a first multi-phase winding (113, 115, 123, 125, 173, 181) having at least three or more phases.
Owner:DAIKIN INDUSTRIES LTD +1
Refrigeration system
InactiveCN223271464UCompressorCompression machines with non-reversible cycleOil separationRefrigerant
The present disclosure relates to a refrigeration system comprising: a compressor (1); an air outlet (2A) of the evaporator (2) is communicated with the air suction port (1A) of the compressor (1) through an air suction pipeline (10); an air inlet (3A) of the oil separator (3) is communicated with an exhaust port (1B) of the compressor (1), an oil outlet (3B) of the oil separator (3) is communicated with the compressor (1) through a first oil return pipeline (20), and a pump (11) is arranged on the first oil return pipeline (20); a liquid inlet (4A) of the automatic oil return device (4) is communicated with the evaporator (2) through a liquid taking pipeline (60) and used for obtaining the liquid refrigerant in the evaporator (2), an oil outlet (4B) of the automatic oil return device (4) is communicated with the air suction pipeline (10) through a second oil return pipeline (30), and at least one of the liquid taking pipeline (60) and the second oil return pipeline (30) is provided with a first on-off valve (18).
Owner:GREE ELECTRIC APPLIANCE INC OF ZHUHAI
Dead steam source high-temperature steam heat pump testing system based on heat energy cyclic utilization
The invention provides a waste steam source high-temperature steam heat pump testing system based on heat energy cyclic utilization, and belongs to the field of compression heat pumps. The invention aims to solve the problems of unstable heat supply in a high-temperature lift, low energy efficiency of an evaporation end, poor temperature control effect of a low-level heat source side and limited thermal control means of an experimental platform. The system comprises a condenser, an expansion valve, a liquid storage tank, an evaporator, a compressor, a water spraying cooling tank, a steam pressure reducing valve, a circulating pump and a regulating valve, or a water mixing cooling tank and a heat supply liquid storage tank are additionally arranged, so that the dynamic balance and control of the temperature of the hot end of the system are realized; or a steam pressure reducing valve is replaced by a steam-water heat exchanger, so that heat exchange is carried out on condensed steam and working medium water to realize mild cooling, and redundant energy consumption is avoided; or a bypass adjustable shunting loop is arranged, so that partial high-temperature backwater bypass mixing is realized, and the thermal matching property and the operation stability of the system are enhanced. According to the invention, the output temperature of over 100 DEG C is realized, and the universality and debugging flexibility of experimental system design are realized.
Owner:HARBIN INST OF TECH
Oil way system, cascade unit, energy-saving equipment and refrigeration equipment
The utility model relates to an oil way system, a cascade unit, energy-saving equipment and refrigeration equipment, the oil way system comprises a first heat exchanger, a first oil tank and a second oil tank, a first channel and a second channel are arranged in the first heat exchanger, and heat exchange can be conducted between the first channel and the second channel; two ends of the first oil tank are respectively communicated with the first channel to form a first circulating oil path; the two ends of the second oil tank communicate with the second channel to form a second circulating oil way. According to the oil way system, when the oil temperature in the first oil tank and the oil temperature in the second oil tank have a large temperature difference, the oil temperature of one oil tank is too low, and the oil temperature of the other oil tank is too high or too high, heat exchange between the two circulating oil ways can be achieved through the first heat exchanger; and therefore, the conditions of too low oil temperature and too high oil temperature are relieved synchronously, and normal operation of an oil way can be guaranteed. No extra heating assembly or oil cooling assembly is needed, and the power consumption and the manufacturing cost of the oil way system can be obviously reduced.
Owner:GREE ELECTRIC APPLIANCE INC OF ZHUHAI
Oil return control method and control system of cascade heat pump system
The invention discloses an oil return control method and system of a cascade heat pump system, and the control method comprises the following steps: 1, detecting a first state parameter of an intermediate heat exchanger so as to adjust a compressor and a throttling device at a low-temperature side and a high-temperature side, and when a second state parameter at the low-temperature side meets a condition, adjusting the compressor and the throttling device at the high-temperature side; the operation frequency of the compressor on the low-temperature side / high-temperature side is adjusted again, and return oil flushing is conducted on the intermediate heat exchanger; the second method comprises the following steps: respectively calculating the accumulated carbonization time of the corresponding lubricating oil in the low-temperature side or the high-temperature side, and judging whether the lubricating oil is replaced or not based on the accumulated carbonization time; and the third method comprises the steps that the accumulated low-frequency operation duration of the compressor on the low-temperature side or the high-temperature side in the low-frequency state is detected, and when the triggering condition is met, the operation frequency of the compressor is increased. Based on the control method, the operation reliability and the energy efficiency performance of the cascade heat pump system are improved, and the service life of equipment is prolonged.
Owner:GUANGDONG EUROKLIMAT AIR CONDITIONING & REFRIGERATION
Fluid machine with bearing and heat exchange device
PendingCN122061974ACompressorSpace heating and ventilation detailsFixed bearingMechanical engineering
The invention provides a fluid machine with a bearing and heat exchange equipment. The fluid machine with the bearing comprises a crankshaft, a cylinder sleeve, the bearing, a cross groove structure and a sliding block, and the crankshaft is provided with two eccentric parts; the crankshaft and the cylinder sleeve are eccentrically arranged and the eccentric distance is fixed; the at least one bearing is arranged on the axial end surface of the cylinder sleeve and is positioned on the outer side of the cylinder sleeve; the cross groove structure is rotatably arranged in the cylinder sleeve, the axial part of the outer circumferential surface of the cross groove structure is attached to an inner ring of the bearing, two limiting channels of the cross groove structure are sequentially arranged in the axial direction of the crankshaft, and the extending direction of the limiting channels is perpendicular to the axial direction of the crankshaft; the sliding blocks are provided with through holes, the two eccentric parts correspondingly stretch into the two through holes of the two sliding blocks, and the two sliding blocks are correspondingly arranged in the two limiting channels in a sliding mode and form a variable volume cavity. The problems that in the prior art, a compressor is low in energy efficiency and large in noise are solved.
Owner:GREE ELECTRIC APPLIANCE INC OF ZHUHAI
Heat dissipation control method, evaporation cooling magnetic suspension system and air conditioner
The invention provides a heat dissipation control method, an evaporation cold magnetic suspension system and an air conditioner. The evaporation cold magnetic suspension system of the air conditioner comprises a heat pipe air wall, a compressor, a first air guide pipeline and a second air guide pipeline, wherein the heat pipe air wall comprises a fan and a heat pipe; according to the system and the method, the low-temperature airflow on the upstream side of the draught fan is directly used for cooling and dissipating heat for the compressor in the low-load state, and part of the low-temperature airflow is used for improving the refrigeration effect of the whole system through the heat pipe while the low-temperature airflow on the upstream side of the draught fan is used for cooling and dissipating heat for the compressor in the high-load state; and in addition, the air flow passing through the heat pipe is synchronously transmitted to the compressor to further cool the compressor, so that the heat dissipation effect of the compressor is improved. The air flow in the heat pipe ventilation wall is fully and reasonably utilized, so that the cooling and heat dissipation effect of the evaporation cold magnetic suspension system on key devices at a compressor is improved.
Owner:GREE ELECTRIC APPLIANCE INC OF ZHUHAI
Water chilling unit operating under extreme working condition
The invention discloses a water chilling unit operating under extreme working conditions, which comprises a fan and a finned condenser at the upper part and a refrigerating unit at the lower part, and the refrigerating unit is provided with a refrigerant circulating system and a chilled water circulating system; the refrigerant circulating system comprises a compressor, a finned condenser, an electronic expansion valve and a shell and tube evaporator which are connected in sequence; the chilled water circulation system comprises a water pipe, a water pump and an evaporator which are connected in sequence; the electronic expansion valve is connected with the drying filter cartridge and the shell and tube evaporator, the drying filter cartridge is connected with the liquid storage tank, and the shell and tube evaporator is connected with the gas-liquid separator. According to the invention, PWM and stepless regulation multi-dimensional cooperative control are used, so that stable operation is realized when the energy efficiency in a wide temperature range is suddenly reduced; on the high-temperature side, the condensation fan adopts a stepless speed regulation technology; and the low-temperature side is switched into a PWM period adjusting mode.
Owner:NANJING HENGBIAO SIRUI REFRIGERATION MASCH MFG CO LTD
Fluid machine and heat exchange device with bearing
ActiveCN116241467BCompressorSpace heating and ventilation detailsFixed bearingMechanical engineering
This invention provides a fluid machine and heat exchange device with bearings. The fluid machine with bearings includes a crankshaft, a cylinder liner, bearings, a cross-groove structure, and sliders. The crankshaft has two eccentric portions; the crankshaft and cylinder liner are eccentrically arranged with a fixed eccentric distance; there is at least one bearing, which is located inside the cylinder liner at the axial end of the cylinder liner, and the outer ring of the bearing is in contact with the inner wall of the cylinder liner; the cross-groove structure is rotatably arranged inside the cylinder liner, and the outer circumferential surface of the cross-groove structure is in contact with the inner ring of the bearing; two limiting channels of the cross-groove structure are sequentially arranged along the axial direction of the crankshaft, and the extension direction of the limiting channels is perpendicular to the axial direction of the crankshaft; the sliders have through holes, and there are two sliders. The two eccentric portions extend into the two through holes of the two sliders respectively, and the two sliders are slidably arranged in the two limiting channels to form a variable volume cavity. This invention solves the problems of low energy efficiency and high noise in existing compressors.
Owner:GREE ELECTRIC APPLIANCE INC OF ZHUHAI
Compressor blockage detection method and device, air conditioner and storage medium
PendingCN120799619ACompressorSpace heating and ventilation safety systemsThermodynamicsMechanical engineering
Owner:GREE ELECTRIC APPLIANCE INC OF ZHUHAI
Systems and methods for controlling a chiller
A heating, ventilation, air conditioning, and refrigeration (HVAC&R) system configured to operate in a plurality of cooling modes includes a mechanical cooling system configured to place a working fluid in a heat exchange relationship with a cooling fluid, a free cooling system configured to place the cooling fluid in a second heat exchange relationship with an ambient air flow, and a controller comprising processing circuitry and a memory, wherein the memory comprises instructions that, when executed by the processing circuitry, are configured to cause the processing circuitry to transition operation of the HVAC&R system between the plurality of cooling modes based on a cooling demand of the HVAC&R system and based on an estimated power consumption of the HVAC&R system.
Owner:TYCO FIRE & SECURITY GMBH
Cascade refrigeration system and control method of ultralow-temperature sample library
PendingCN121112509ACompressorCompression machines with cascade operationIntermediate heat exchangerOil separation
The invention relates to the technical field of sample storage, particularly provides a cascade refrigeration system and a control method of an ultralow-temperature sample library, and aims to solve the problem that normal operation of a unit is affected due to abnormal oil return of an existing cascade refrigeration system. In order to achieve the purpose, the cascade refrigeration system comprises a high-temperature-stage refrigeration unit, a low-temperature-stage refrigeration unit and an intermediate heat exchanger, the low-temperature-stage refrigeration unit comprises a low-temperature compressor, an oil separation device and a heat exchange device, the oil separation device comprises a plurality of oil separators arranged in sequence, and a heat exchanger is arranged between every two adjacent oil separators; the low-temperature compressor, the oil separation device, the intermediate heat exchanger and the heat exchange device are communicated with one another to form a low-temperature-stage refrigerant circulation loop, and the high-temperature-stage refrigeration unit and the intermediate heat exchanger are communicated with one another to form a high-temperature-stage refrigerant circulation loop. The oil separation efficiency can be improved, deep oil removal is achieved, and oil return is remarkably improved.
Owner:QINGDAO HAIER BIOMEDICAL TECH CO LTD +1
Motor, compressor and refrigeration equipment
ActiveCN121124487ACompressorRotary/oscillating piston combinations for elastic fluidsElectric machinePermanent magnet motor
The invention discloses a motor, a compressor and refrigeration equipment, and relates to the technical field of permanent magnet motors, the motor comprises a stator iron core and a rotor iron core, rotor holes are formed in the inner circumference of the stator iron core, the number of stator grooves is Q, the width of each stator groove opening in the circumferential direction is W, and the minimum radius of each rotor hole is R; an inter-pole groove is concavely arranged between every two adjacent magnetic steel grooves and on the periphery of the rotor core, n harmonic grooves distributed at intervals are further concavely arranged on the periphery of the rotor core in sequence, central angles of the n harmonic grooves are A1, A2, and An in sequence on the circle center of the rotor core, a central angle of the inter-pole groove is As, and the number of poles of the motor is 2P, and the formula is satisfied. The technical scheme provided by the invention aims to suppress harmonic waves, reduce torque pulsation and further reduce the operation noise of the motor.
Owner:GUANGDONG MEIZHI COMPRESSOR
Power transmission device for hybrid air conditioning system, and hybrid air conditioning system
To downsize a hybrid air conditioning system.SOLUTION: A hybrid air conditioning system includes a refrigerant circuit provided with an indoor heat exchanger and an outdoor heat exchanger, a motor generator 21 in which an MG shaft gear 232 is attached to a rotation shaft 211, an engine 20 in which an EG shaft gear 231 is attached to an output shaft 201, and a compressor in which CP shaft gears 233a, 233b are provided in input shafts 221a, 221b and which is operated by a driving force supplied to the input shafts 221a, 221b to circulate refrigerant in the refrigerant circuit. The EG shaft gear 231, the MG shaft gear 232, and the CP shaft gears 233a, 233b are coordinated to transmit power, and the EG shaft gear 231 and the MG shaft gear 232 are directly engaged.SELECTED DRAWING: Figure 2
Owner:AISIN CORP
Refrigerant circulation system
A refrigerant circulation system configured to circulate oil-containing CO2 refrigerant includes a compressor, a motor, an oil tank, first to third passages, a flow regulating valve provided to the first and / or second passages, a motor rotational speed sensor, and a controller which controls the flow regulating valve(s). The refrigerant supplied from the compressor flows through the first passage, the oil supplied from the oil tank flows through the second passage. The motor includes a rotation shaft coupled to a rotor, and slide bearings which are lubricated using liquefied refrigerant compressed by the compressor and support the rotation shaft. The third passage communicates the first passage with the second passage and supplies to the slide bearings the refrigerant mixed with the oil. The controller controls the flow regulating valve according to the detected rotational speed to change a proportion of the oil in the refrigerant supplied to the slide bearings.
Owner:MAZDA MOTOR CORP
Control method and control device of compressor unit
According to the control method and device for the compressor unit, the oil level of the first compressor and the oil level of the second compressor can be adjusted without additionally arranging an oil return pipeline. The first aspect of the invention provides a control method of a compressor unit, the compressor unit is provided with a first compressor and a second compressor, and the first compressor and the second compressor are communicated through a gas balance pipe and an oil balance pipe. Wherein the compressor unit has a conventional working step and an oil level adjusting step which are alternately operated, and in the oil level adjusting step, the compressor unit changes the rotating speed of the first compressor and / or the second compressor and adjusts the oil levels of the first compressor and the second compressor.
Owner:CARRIER CORP
Self-adaptive defrosting and oil return cooperative control method and device of heat pump unit and computer storage medium
The invention relates to the technical field of heat pump units, and discloses a self-adaptive defrosting and oil return cooperative control method and device of a heat pump unit and a computer storage medium. The method comprises the steps that the current outdoor heat exchanger coil temperature parameter of the heat pump unit in the defrosting operation state is obtained, and according to the current outdoor heat exchanger coil temperature parameter, the heat pump unit in the defrosting operation state is defrosted; judging whether the heat pump unit meets a defrosting exit condition or not; if yes, target operation parameters of a compressor of the heat pump unit are obtained, and whether the heat pump unit meets the oil return time condition or not is judged according to the target operation parameters; if yes, the heat pump unit is controlled to execute the defrosting quit operation, and after the defrosting quit operation is completed, the heat pump unit is controlled to return oil, in this way, the self-adaptive defrosting and oil return cooperative control process of the heat pump unit is achieved, the unnecessary working condition switching frequency of the heat pump unit is reduced, and the unit can operate continuously; and the indoor temperature fluctuation is reduced, and the oil gas recovery efficiency is improved, so that the operation energy efficiency and reliability of the heat pump unit are improved.
Owner:GUANGDONG WOTECH RENEWABLE ENERGY & TECH CO LTD
Compressor oil recovery in hybrid VCC pumped two phase loops
A cooling system includes a liquid loop, a vapor compression loop, and a heat exchanger in fluid communication with each of the liquid loop and the vapor compression cycle loop. The liquid loop includes a cold sink for cooling a heat load. The vapor compression cycle loop is fluidly coupled to the liquid loop by a separator, which is configured to separate a two-phase form of a working fluid received from the cold sink into a vapor form of the working fluid and a liquid form of the working fluid.
Owner:HAMILTON SUNDSTRAND CORP
Systems, equipment and methods for stabilizing hydrofluoroolefins in refrigerant systems
The present invention relates to system, equipment and methods for preparing and charging a refrigerant circuit with either (1) a fluoroolefin refrigerant compositions stabilized with an inhibitor agent which prevents or reduce oligomerization or polymerization of the fluoroolefin component of the composition or (2) a purified fluoroolefin refrigerant compositions by removing the inhibitor agent, and / or maintaining the integrity of fluoroolefin refrigerant compositions in refrigeration equipment by circulating the fluoroolefin refrigerant compositions in the refrigerant equipment through or more columns or devices to remove at least one of oxygen and oxygen containing contaminants, moisture / water, oligomerization / polymerization by-products.
Owner:CHEMOURS CO FC LLC THE
Reciprocating compressor and fluid injection system
PendingUS20250389263A1CompressorPositive displacement pump componentsWorking fluidDischarge pressure
A compressor includes a housing, a first compression mechanism and a second compression mechanism disposed in the housing, and a housing cover fixed to the housing. Both the first compression mechanism and the second compression mechanism are configured to compress a working fluid from a suction pressure to a discharge pressure. The first compression mechanism includes a first cylinder housing having a first fluid storage plenum. The second compression mechanism includes a second cylinder housing having a second fluid storage plenum. The housing cover defines an intermediate-fluid port in fluid communication with the first fluid storage plenum via a first intermediate-fluid passage and the second fluid storage plenum via a second intermediate-fluid passage. Working fluid at an intermediate pressure enters the intermediate-fluid port. The intermediate pressure is greater than the suction pressure and less than the discharge pressure.
Owner:COPELAND LP
Shock absorber, vibration isolation device, two-device cover and refrigeration equipment
The embodiment of the utility model provides a shock absorber, a vibration isolation device, two device covers and refrigeration equipment, and belongs to the technical field of refrigeration, a first deformation mechanism has positive rigidity, and one end of the first deformation mechanism is installed on a main base. The adjusting blocks are connected with the other end of the first deformation mechanism, the adjusting blocks and the main base are arranged in the first direction, the adjusting blocks are arranged on the two opposite sides of the first deformation mechanism in a striding mode in the second direction, and the second direction and the first direction are arranged in a crossed mode. The auxiliary bases are arranged on the two opposite sides of the main base in the second direction. The second deformation mechanisms have negative stiffness, the auxiliary bases on each side are correspondingly provided with the second deformation mechanisms, and the second deformation mechanisms on each side are rotationally connected with the corresponding auxiliary bases and the corresponding ends of the adjusting blocks correspondingly. According to the shock absorber, the vibration isolation device, the two device covers and the refrigeration equipment, the good vibration isolation effect is achieved in a low-frequency interval, and vibration noise of the two device covers can be reduced.
Owner:HEFEI HUALING CO LTD +2
Combined heat exchanger, heat exchanging system and the optimization method thereof
A combined heat exchanger, a heat exchange system, and an optimization method thereof are provided. The heat exchange system includes: an enhanced vapor injection compressor, a condenser, an expansion valve and an evaporator, which are located in a main circuit; wherein the heat exchange system further includes a first branch branched from the main circuit to an vapor injection port of the compressor at a branch point P downstream of the condenser, and a first heat exchange unit and a second heat exchange unit are further provided in the main circuit between the branch point P and the expansion valve; and wherein a refrigerant leaving the condenser is divided at the branch point P into a first portion passing through the first heat exchange unit and the second heat exchange unit from the main circuit, and a second portion passing through the first branch to the vapor injection port.
Owner:CARRIER CORP
Compressor refrigeration and fluorine pump refrigeration dual-circulation system
The invention discloses a compressor refrigeration and fluorine pump refrigeration dual-circulation system, and relates to the technical field of refrigeration equipment, the compressor refrigeration and fluorine pump refrigeration dual-circulation system comprises a compressor refrigeration system and a fluorine pump refrigeration system, and the compressor refrigeration system and the fluorine pump refrigeration system are coupled to form the dual-circulation system for cooling electronic components; the compressor refrigerating system comprises a compressor, a condenser, a liquid storage device, a thermostatic expansion valve, a plate heat exchanger and a gas-liquid separator. The compressor, the condenser, the liquid storage device, the thermostatic expansion valve, the plate heat exchanger and the gas-liquid separator are sequentially connected to form a closed loop. The operation of the double-circulation system is controlled through the fluorine supply temperature collected by the temperature sensor installed at the inlet of the cold plate assembly, the fluorine pump refrigeration system conveys a certain flow of refrigerant to the cold plate assembly for heat exchange, and the refrigerant flowing out of the cold plate assembly exchanges heat with the compression refrigeration system through the plate heat exchanger. And the opening balance system is adjusted to output cold energy to the cold plate assembly.
Owner:HEFEI FENGLAN ELECTRIC CO LTD
Spray type water working medium quasi-saturated compression high-temperature heat pump system
The invention provides a spray type water working medium quasi-saturated compression high-temperature heat pump system, and belongs to the field of compression heat pumps. The problems that in the water vapor compression process, the exhaust degree is large, and large-amplitude temperature rise flexible heat supply is difficult to achieve are solved. The system comprises a condenser, an expansion valve, a liquid storage tank, an evaporator, a compressor, an atomization buffer tank, a gas-liquid jet atomizer and a regulating valve, the atomization mode comprises a gas-liquid ejector atomization mode, a high-pressure condensate + atomization nozzle mode or an atomization high-pressure pump + atomization nozzle mode, and is used for preparing atomized liquid drops with the particle size of 50-500 nm for quasi-saturation compression; or single-stage compression is further optimized into a two-stage compression form, so that higher heating temperature and more stable system operation are realized. The micro-nano spraying technology is utilized, the mass fraction of liquid in mixed airflow is always kept between 5% and 10%, heat conversion in the system can be achieved, and through multi-stage continuous phase change cooling, the superheat degree of compressed exhaust is effectively reduced, and compression power consumption is reduced.
Owner:HARBIN INST OF TECH
Multi-split heat recovery multi-split air conditioning system
The invention relates to the technical field of household appliances, in particular to a multi-split heat recovery multi-split air conditioning system which comprises an air conditioning system, a hot water system, an adjusting unit and a controller, the air conditioning system, the hot water system and the adjusting unit are connected with one another, and the controller responds to a control instruction and controls the multi-split heat recovery multi-split air conditioning system to operate in different working modes. The working modes of the multi-split heat recovery multi-split air conditioning system can be enriched, and the intelligence is improved; meanwhile, the controller controls the state of each component in the adjusting unit in different working modes, so that the on-off state between the refrigerant circulation loop and the water tank branch and the on-off state between the outdoor heat exchanger and the indoor heat exchanger group in the refrigerant circulation loop are adjusted; therefore, the refrigerant which does not participate in heat exchange in the refrigerant circulation loop and / or the water tank branch flows back to the compressor based on the pressure difference between the flow path where the refrigerant is located and the inlet of the compressor, refrigerant retention can be avoided, the refrigerant amount during operation of the air conditioning system is ensured, and the refrigerating efficiency of the air conditioning system is improved.
Owner:HISENSE (SHANDONG) AIR CONDITIONING CO LTD
Methods for Managing Cryogen Within the Core of a Cryogenic Cell
A method for managing the cryogen within the core of a cryogenic cell. The method includes causing or allowing a cryogen within the core of the cryogenic cell to vaporize, forming vaporized cryogen, in response to a thermal load in a pressurizable space. The pressurizable space is in at least partial thermal communication with the core according to a pressure within the pressurizable space. The vaporized cryogen is removed from the core and regenerated external to the cryogenic cell. The regenerated cryogen may be returned to the core. The regenerated cryogen may be in liquid form. A manifold may be used to manage the removal and the regeneration for several cryogenic cells. Removal, regeneration, and return of cryogen to cores may be increased or decreased in accordance with the thermal load.
Owner:BETA PATENTS LLC
Refrigerant compressor group
A refrigerant compressor group for a refrigeration system that includes least two piston compressors operating in parallel between a common low-pressure connector and a common high-pressure connector. To adjust it to different requirements, in a refrigerant compressor group, a variable overall mass flow throughput in the refrigerant compressor group is adjustable. For at least one of the piston compressors, its mass flow throughput is adjustable by speed selection using a frequency converter for the electric motor. For at least one of the piston compressors, its mass flow throughput is adjustable by cylinder selection. An operating condition controller for the refrigerant compressor group is provided which, on the basis of a performance request signal of the refrigeration system that is transmitted to the operating condition controller, controls the overall mass flow throughput by open or closed-loop control by predetermining the cylinder selection and the speed selection.
Owner:BITZER KUEHLMASCHINENBAU GMBH
Refrigeration structure with anti-deformation pipeline and ice cream machine using same
The utility model discloses a refrigeration structure with an anti-deformation pipeline and an ice cream machine using the refrigeration structure. The refrigeration structure comprises a freezing cylinder, a compressor, a heat exchanger, a refrigeration circulating pipeline and a heat exchange circulating pipeline, the compressor is provided with a condensation outlet, a condensation inlet, a heat exchange inlet and a heat exchange outlet; the refrigeration circulation pipeline comprises a capillary tube, a condensation tube and an air return tube which are sequentially communicated; the heat exchange circulation pipeline comprises a cold source input pipe and an exhaust pipe. According to the refrigeration structure, an air return pipe is arranged in a refrigeration circulation pipeline, an exhaust pipe is arranged in a heat exchange circulation pipeline, and a plurality of sections of bent structures are arranged in the air return pipe and the exhaust pipe respectively, so that anti-bending structures are formed. Due to the fact that the air return pipe and the exhaust pipe are of a bent structure, the air return pipe and the exhaust pipe can bear drawing force and deform to a certain degree when vibration occurs in the transportation process or collision and falling occur in the carrying process, and therefore the air return pipe and the exhaust pipe can bear influences caused by vibration, and the problem that the air return pipe and the exhaust pipe are damaged is solved.
Owner:ZHONGSHAN DONLIM WEILI ELECTRICAL APPLIANCES CO LTD