1489results about "Compressor" patented technology

The invention discloses an oil return control method and system of a cascade heat pump system, and the control method comprises the following steps: 1, detecting a first state parameter of an intermediate heat exchanger so as to adjust a compressor and a throttling device at a low-temperature side and a high-temperature side, and when a second state parameter at the low-temperature side meets a condition, adjusting the compressor and the throttling device at the high-temperature side; the operation frequency of the compressor on the low-temperature side / high-temperature side is adjusted again, and return oil flushing is conducted on the intermediate heat exchanger; the second method comprises the following steps: respectively calculating the accumulated carbonization time of the corresponding lubricating oil in the low-temperature side or the high-temperature side, and judging whether the lubricating oil is replaced or not based on the accumulated carbonization time; and the third method comprises the steps that the accumulated low-frequency operation duration of the compressor on the low-temperature side or the high-temperature side in the low-frequency state is detected, and when the triggering condition is met, the operation frequency of the compressor is increased. Based on the control method, the operation reliability and the energy efficiency performance of the cascade heat pump system are improved, and the service life of equipment is prolonged.

The invention 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.

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.

The invention relates to the technical field of sample storage, particularly provides a cascade refrigeration system and a control method of an ultralow-temperature sample library, and aims to solve the problem that normal operation of a unit is affected due to abnormal oil return of an existing cascade refrigeration system. In order to achieve the purpose, the cascade refrigeration system comprises a high-temperature-stage refrigeration unit, a low-temperature-stage refrigeration unit and an intermediate heat exchanger, the low-temperature-stage refrigeration unit comprises a low-temperature compressor, an oil separation device and a heat exchange device, the oil separation device comprises a plurality of oil separators arranged in sequence, and a heat exchanger is arranged between every two adjacent oil separators; the low-temperature compressor, the oil separation device, the intermediate heat exchanger and the heat exchange device are communicated with one another to form a low-temperature-stage refrigerant circulation loop, and the high-temperature-stage refrigeration unit and the intermediate heat exchanger are communicated with one another to form a high-temperature-stage refrigerant circulation loop. The oil separation efficiency can be improved, deep oil removal is achieved, and oil return is remarkably improved.

The 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.

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.

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.

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.

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.

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.

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.

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.

An integrated plate heat exchanger, a temperature control apparatus, an energy storage device, and a vehicle are disclosed. The heat exchanger includes an intermediate partition plate (40), a plate condenser (10), and a plate evaporator (20). The plate condenser (10) and the plate evaporator (20) are respectively fastened on two opposite sides of the intermediate partition plate (40), the plate condenser (10) includes a plurality of condenser heat exchange plates (15) that are stacked, and the plate evaporator (20) includes a plurality of evaporator heat exchange plates (25) that are stacked. At least one of a stacking direction of the plurality of condenser heat exchange plates 915) or a stacking direction of the plurality of evaporator heat exchange plates (25) is parallel to or perpendicular to the intermediate partition plate. The heat exchanger has a compact structure and a small overall volume, and may occupy less internal space of the temperature control apparatus.

The utility model discloses an integrated environment control device for a plant factory, which relates to the technical field of plant factories and comprises a machine body, a heat exchanger group and a circulating flow channel group. According to the technical scheme, the heat exchanger set is arranged in the circulation channel, when the fan wall outputs power and extracts gas in the plant factory, and the gas passes through the heat exchanger set, liquid in the gas is liquefied and dehumidified through the temperature difference of the heat exchanger set, and dehumidification is achieved. And in the refrigerant circulation process, the temperature of the dehumidified and cooled gas can be heated again and is sent back into the plant factory, so that dehumidification and temperature adjustment control over the environment of the plant factory is achieved, negative pressure can be formed in the air flue when the fan wall works, external fresh air can enter the circulation channel through the air flue, and therefore the temperature of the plant factory can be controlled. And the dehumidifier, the air conditioning equipment and the fresh air machine are integrally designed, so that the temperature and humidity adjusting cost of the plant factory is greatly reduced.

The invention belongs to the technical field of heat management, and relates to an integrated heat pump unit and a heat management system, the integrated heat pump unit comprises a compressor, a first three-way electronic valve, a water-cooling condenser, an electronic expansion valve and a battery cooler, and a shell of the compressor is provided with a plurality of interfaces and cavities for installing and connecting the components and forming a refrigerant circulation path. According to the integrated heat pump unit, through the innovative design of the cavity and the flow channel of the compressor shell, the liquid storage function and the refrigerant circulation function are highly integrated into the compressor body. The number of liquid storage tanks, external pipelines and connectors needed by a traditional heat pump system is remarkably reduced, the filling amount of refrigerants is reduced, potential leakage points are effectively reduced, and therefore the sealing performance and reliability of the system are directly improved; meanwhile, due to the integrated design, the middle link of refrigerant flowing is reduced, on-way flowing resistance and on-way heat loss can be reduced, and positive significance is achieved for improving the energy efficiency of the system.

The invention provides a CO2 trapping system and method based on a compression-absorption heat pump. The CO2 trapping system comprises a CO2 trapping unit, a CO2 compression and liquefaction unit and a compression-absorption heat pump unit, the CO2 trapping unit at least comprises an absorption tower and a desorption tower, and the absorption tower is connected to the desorption tower through a CO2 rich liquid pipeline via the compression-absorption heat pump unit; the CO2 compression and liquefaction unit is connected with the compression-absorption heat pump unit through a liquefied CO2 pipeline; the compression-absorption heat pump unit is used for extracting low-grade heat energy of liquefied CO2 generated by the CO2 compression and liquefaction unit and converting the low-grade heat energy into high-grade heat energy to heat CO2 rich liquor in the CO2 capture unit. According to the CO2 capturing system provided by the invention, the compression-absorption heat pump unit is utilized to realize efficient utilization of heat of the whole system for capturing CO2 from combustion flue gas to form a liquefied product, so that the heat grade and the heat pump performance coefficient are improved, the energy consumption of the CO2 capturing system is greatly reduced, and energy-saving CO2 capturing is realized.

The present application provides a spiral compressor comprising: a movable spiral disk; a fixed spiral disk, wherein the fixed spiral disk has a base plate and a spiral wall arranged on the base plate; and a housing arranged on the side of the base plate facing away from the spiral wall.The housing comprises a first chamber having a first opening on the bottom surface of the housing facing the base plate, this first opening being covered by the base plate to form an injection chamber connected via an injection port on the base plate to the compression chamber, which is formed by the movable spiral disk and the fixed spiral disk and corresponds to the intermediate pressure stage, the first chamber being connected to the injection port of the scroll compressor, wherein a check valve is arranged in the first chamber, which releases the flow in the direction from the injection port to the injection chamber and prevents backflow. The present application also relates to a corresponding heat pump device. The advantage of this application lies in its ability to form an injection chamber for a scroll compressor with a simple structure and a small number of components.

The present application relates to a kind of system and adaptation method suitable for wind energy direct drive heat pump unit;The system includes temperature module, wind speed module, rotational speed module, control unit, air supplementing enthalpy increasing pipeline solenoid valve and evaporator bypass solenoid valve;The control flow of adaptation method includes temperature control, rotational speed control and wind speed control;After adaptation method is started, temperature, rotational speed and wind speed control are carried out in parallel until all controls are cancelled by user.The present application can effectively solve the problem that existing control scheme is difficult to operate at low wind speed, and can effectively improve the rated operating wind speed of wind heat pump, can effectively improve the rated heating capacity of wind heat pump, for the equipment without using this scheme, the present application can improve the heating capacity by about 35%.The present application can also effectively improve the efficiency of wind energy utilization.

The utility model relates to the technical field of air energy heat pumps, and discloses integral air energy heat pump equipment which comprises an equipment frame, a partition plate is in threaded connection with the inner wall of the equipment frame, a protection mechanism is arranged on the top of the partition plate, a buffering mechanism is arranged on the bottom side of the interior of the equipment frame, and the protection mechanism comprises two protection frames. The bottoms of the two protection frames are fixedly connected to the top of the partition plate, the close sides of the protection frames are fixedly connected with connecting plates, the two sides of the interior of each protection frame are fixedly connected with ventilation grids, and the two sides of the exterior of the equipment frame are both in threaded connection with baffles. According to the protection mechanism, the protection frame is connected with the connecting plate, and then the protection frame drives the ventilation fence to be fixed, so that through cooperation of all structures of the protection mechanism, internal electric control components are convenient to maintain, the protection capacity of equipment to the internal components is improved, and the overall stability of the structure is enhanced.

A vehicle refrigerant system using hot gas bypass and steam injection is provided. A steam injection refrigerant system includes a compressor comprising at least a first stage input and a second stage input and an output arranged to provide an output steam refrigerant. A condenser is fluidly coupled to the output of the compressor to receive the output vapor refrigerant, and an evaporator is fluidly coupled between the condenser and the first stage input. The evaporator is arranged to provide refrigerant in vapor form to a first stage input of the compressor. A cooler is fluidly coupled between the condenser and both the first stage input and the second stage input. The chiller is arranged to inject refrigerant in the form of steam into the first stage input or the second stage input. A bypass branch fluidly couples the output of the compressor to the first stage input of the compressor to provide at least some output vapor refrigerant to the first stage input without routing through the condenser, evaporator, and cooler.

The invention relates to a refrigerant assembly and a heat management device, the refrigerant assembly comprises a compressor, a passage assembly, a connecting assembly and at least one heat exchange assembly, the compressor comprises an inlet part and an outlet part, the heat exchange assembly is provided with a port part, at least one of the inlet part and the outlet part is communicated with the port part through the passage assembly, and the connecting assembly comprises a connecting plate; at least one of the inlet part of the compressor and the outlet part of the compressor and the port part of the heat exchange assembly are both connected with the connecting assembly in a sealed mode, the two ends of the passage assembly are both connected with the connecting assembly in a sealed mode, and the assembling difficulty of the refrigerant assembly is easily simplified.

The application discloses a drainage mechanism, a heat exchange unit and a heat exchange equipment. The drainage mechanism comprises a drainage member, the drainage member extends along the length direction of a heat exchange pipe, the drainage member is provided with a drainage surface facing the outer side wall surface of the heat exchange pipe, and the drainage surface is suitable for forming a climbing gap between the outer side wall surface of the heat exchange pipe. The climbing gap is formed between the drainage surface and the heat exchange pipe, so that the medium flows faster in the part with the climbing gap compared with other positions. For example, the oil drops of lubricating oil and the refrigerant in a gaseous state will flow to the outlet along the climbing gap, so that the mixture of the refrigerant and the lubricating oil still flows out of the outlet of the heat exchanger after passing through the heat exchanger, thereby reducing the inner volume of the heat exchanger on one hand and effectively avoiding oil loss of the system on the other hand.

A refrigeration system includes a compressor, an evaporator connected to a low pressure line of the compressor, a condenser, an expansion device, and a cooling circuit. The cooling circuit includes at least one coolant supply line to channel a coolant towards the compressor, at least one coolant flow channel defined by a housing of the compressor that channels the coolant towards a motor of the compressor, a coolant return line to channel the coolant towards the low pressure line of the compressor, and a damping chamber located between the coolant return line and the low pressure line of the compressor. The damping chamber includes a damping chamber inlet to allow the coolant to enter a damping chamber volume from the coolant return line and damping chamber outlets to allow the coolant in the damping chamber volume to enter the low pressure line of the compressor.

The application discloses a refrigeration system and a control method, device, equipment and medium thereof, to provide a refrigeration system coexisting air-cooled refrigeration mode and liquid-cooled refrigeration mode. The system comprises a compressor circulation heat exchange system and a natural cold source circulation heat exchange system for heat exchange through an intermediate heat exchanger. The compressor circulation heat exchange system comprises a throttling valve, a first condenser and at least one compressor connected in sequence on the primary side of the intermediate heat exchanger, one end of the primary side of the intermediate heat exchanger is connected with the throttling valve, and the other end is connected with the common end of the at least one compressor. The natural cold source circulation heat exchange system comprises a pump, an air-cooled heat exchanger, a liquid-cooled heat exchanger and a second condenser connected on the secondary side of the intermediate heat exchanger. The air-cooled heat exchanger and the liquid-cooled heat exchanger are connected in parallel and then connected between the pump and the second condenser. One end of the secondary side of the intermediate heat exchanger is connected with the second condenser, and the other end is connected with the pump.

This invention provides a muffler, a compressor, and an air conditioner. The muffler includes a muffler body having a flow chamber, a first exhaust passage, a first silencing chamber, a first exhaust port, and a first vent. The flow chamber is connected to the outside of the muffler body through the first exhaust passage, and the first silencing chamber is connected to the outside of the first exhaust port through the first exhaust port. The two ends of the first vent lead to the flow chamber and the first silencing chamber, respectively. A first valve body is located in the first silencing chamber and can open or close the first vent according to the flow rate of the fluid flowing in the first exhaust passage. According to this invention, because the first silencing chamber diverts the gaseous refrigerant flowing in the flow chamber when the exhaust pulsation is large, the gaseous refrigerant with different flow rates is automatically matched with the corresponding flow path and chamber, thus optimizing the exhaust pulsation problem. At the same time, adaptively adjusting the flow path and chamber corresponding to the gaseous refrigerant with different flow rates also achieves noise reduction for multiple frequency bands.

An outer rotor of a compressor includes: a core formed in a hollow cylindrical shape; a plurality of permanent magnets disposed on an inner circumferential surface of the core; a cap disposed to cover one end of the core and including a bushing hole formed at a center thereof; and the bushing is arranged in the bushing hole of the top cover. The core and the bushing are made of a metal material, and the cap is made of a resin material. The top cover includes at least one inner notch formed on an inner circumferential surface of the bushing hole and at least one outer notch formed on an outer circumferential surface of the top cover.

A screw compressor includes: a pair of rotor shafts; a balance piston disposed on at least one of the rotor shafts; a balance piston chamber disposed on a suction side in an axial direction with respect to the balance piston; and a stationary member having an inner peripheral surface facing an outer peripheral surface of the balance piston. The balance piston has a communication passage therein that communicates with the balance piston chamber and with an oil reservoir between the outer peripheral surface of the balance piston and the inner peripheral surface of the stationary member, and the communication passage includes a radial flow path extending along a radial direction inside the balance piston.

The application discloses a machine room air conditioner and a control device and method thereof. The device comprises: a collection unit configured to obtain a pressure value of a first compressor fluorine system, denoted as a first high-pressure value; obtain a pressure value of a second compressor fluorine system, denoted as a second high-pressure value; and obtain a water outlet temperature of a shell-tube condenser (11); a control unit configured to determine a condensing pressure value of the shell-tube condenser (11) according to the first high-pressure value and the second high-pressure value; and the control unit is further configured to control an adjusting water valve according to the condensing pressure value of the shell-tube condenser (11) and the water outlet temperature of the shell-tube condenser (11). The scheme can improve the unit energy efficiency ratio of the machine room air conditioner by adopting a double fluorine system sharing one condensing shell-tube water cooling system.

The system includes a dynamic compressor and a controller having a processor and a memory. The compressor includes a first compressor stage having a first variable inlet guide vane (VIGV) and a second compressor stage having a second VIGV. The memory stores instructions programming the processor to operate the compressor at a current speed, a first position of the first VIGV, and a second position of the second VIGV to compress a working fluid and determine if a condition is met. If the condition is not met, the processor is programmed to continue operating the compressor at the current speed, the first position of the first VIGV, and the second position of the second VIGV. If the condition is met, the processor is programmed to change the second position of the second VIGV to a third position and maintain the first position of the first VIGV.