697 results about "Intermediate pressure" patented technology

The invention provides a solar energy-air energy composite heat pump system based on self-contained energy storage cascade application and a control method. The solar energy-air energy composite heat pump system comprises a heat pump host module, a solar module and a hydraulic module. Hot water generated by the solar heat collector is accumulated in the energy storage water tank and serves as an external heat source for active enhanced vapor injection to improve the performance of the heat pump. An active enhanced vapor injection device is designed for a heat pump host module, a refrigerant in an economizer absorbs heat of heat storage hot water, is jetted to a middle pressure cavity of a compressor and is converted into heating capacity, and the performance of the heat pump is greatly improved. When it is detected that the temperature in the heat storage water tank is reduced to a certain temperature, the flow direction of the heat storage hot water is switched through the switching assembly, the heat storage hot water is pumped to the heat pump fluorine-water heat exchanger for heat exchange, the heat pump performance is improved, and cascade application of the heat storage hot water is achieved. Refrigerant flows in the fin type heat exchanger and the fluorine-water heat exchanger are controlled by respective electronic expansion valves, and the opening degrees of the fin type heat exchanger and the fluorine-water heat exchanger are adjusted according to respective air suction superheat degrees, so that respective optimal heat exchange effects are realized.

The invention provides a flash steam pressurization gas supply and reliquefaction circulation combined system and a liquid cargo ship. The combined system comprises a first heat exchanger, a second heat exchanger, a multi-stage compression device, a reliquefaction pipeline and a gas-liquid separation module, and flash steam is input into the first side of the first heat exchanger. The main inlet of the compression device is connected with the first side of the first heat exchanger. And a liquid return opening is formed in the pipeline before the last-stage compression in the compression device. And an outlet of the reliquefaction pipeline is connected with a second side inlet of the first heat exchanger and a first side inlet of the second heat exchanger through parallel connection of first and second pipelines. The second side of the first heat exchanger and the first side outlet of the second heat exchanger are connected with the liquid inlet of the gas-liquid separation module, the liquid outlet is connected with the liquid cargo tank, and at least part of gas discharged from the gas outlet is sent to the pipeline before the first-stage compression and after the first-stage compression of the liquid return port through the second side of the second heat exchanger. High-pressure gas supply and flash steam medium-pressure reliquefaction are achieved, energy consumption is reduced, and the reliquefaction capacity is improved.

The invention discloses a low-pressure cylinder zero-output coupling steam heat accumulator which comprises an intermediate-pressure cylinder connected with a reheating hot section of a steam turbine; the low-pressure cylinder is connected with the output end of the medium-pressure cylinder; a cooling steam source is also connected; the generator is connected with the output end of the medium-pressure cylinder and / or the low-pressure cylinder to generate electric energy; the condenser is connected with the output end of the low-pressure cylinder; the condensate pump is connected with the output end of the condenser and further connected with the output end of the intermediate-pressure cylinder. The steam heat accumulator is connected with the output end of the medium-pressure cylinder; and the regenerative heating mechanism is respectively connected with the output ends of the steam heat accumulator and the intermediate pressure cylinder and is also connected with the input end of the condensate pump. In the deep peak regulation period of the unit, cooling steam enters the low-pressure cylinder, output of the unit can be reduced, part of heat is released through the steam heat accumulator, return water is heated and output through the regenerative heating mechanism, and deep peak regulation and thermoelectric decoupling of the unit are achieved.

The utility model relates to the technical field of steam turbines, and discloses a thermodynamic system of a coupling back pressure turbine for wide-load peak regulation, which is provided with a boiler, a back pressure turbine, a high-pressure cylinder, an intermediate-pressure cylinder, a low-pressure cylinder, a generator and a recovery mechanism, the boiler is respectively connected with the back pressure machine, the high-pressure cylinder and the intermediate-pressure cylinder; the back pressure machine is connected with the high-pressure cylinder; the medium-pressure cylinder is connected with the low-pressure cylinder; the low-pressure cylinder is connected with the generator; the recycling mechanism is connected with the low-pressure cylinder and the boiler and used for condensing steam discharged by the low-pressure cylinder and recycling and conveying the steam to the boiler. In a high-load operation state, the thermodynamic system, the back pressure turbine and the high-pressure cylinder operate in parallel, and the boiler conveys steam to the back pressure turbine and the high-pressure cylinder. In the thermodynamic system in a low-load operation state, the back pressure machine and the high-pressure cylinder are connected in series for operation, the boiler conveys steam to the back pressure machine, and the back pressure machine conveys steam to the high-pressure cylinder. According to the utility model, the pressure of steam entering the steam turbine during low-load operation can be improved, and the feed water temperature and the operation economy can be improved.

The invention relates to enclosures (1) for gas-insulated medium-voltage or high voltage apparatuses. A connection portion (4) between a first end (20) of the first enclosure tube (2) and a mating machined second end (30) of the second enclosure tube (3) has a gas-escape path (L) running from the inside (6) to the outside (7) of the enclosure tubes (2, 3). According to the invention, the gas-escape path (L1) is shaped to have a first segment (L1) running along an at least partially axial direction of the enclosure (1) and being equipped with least one sealing ring (5; 5a, 5b). In addition, a slim ring-like snap-on bracket (9) can be used. The direct machining of the mating enclosure ends (20, 30) allows to omit conventional flanges. The partially axial orientation of the gas-escape path (L) allows to provide plural sealing rings (5; 5a, 5b) in series in the gas-escape path (L).

Refrigerant circuit of a combined refrigeration system and heat pump with integrated steam injection circuit, wherein a 3-way valve (2) is arranged as a distribution point in the refrigerant circuit after a compressor (1), and an outdoor condenser / gas cooler (3), a main internal heat exchanger (5) and a check valve (6) as well as a connection point (19) are arranged in a refrigeration system line, and an indoor condenser / gas cooler (4) and a check valve (6) are arranged in a heat pump line,after which the heat pump line is joined to the refrigeration system line at the connection point (19) and the condensed or cooled refrigerant is subsequently led via an expansion device vapor injection (7) via the cold side of a secondary internal heat exchanger (8) to a medium-pressure chiller (9) and subsequently via a direct steam injection connection (18) into the compressor (1) and / or the condensed or cooled refrigerant is led via the warm side of the secondary internal heat exchanger (8) to an evaporator (12) and / or to a low-pressure chiller (13) before the refrigerant vapor is led via a liquid separator suction side (14) and the main internal heat exchanger (5) on the cold side to the suction side of the compressor (1).

The invention discloses a decarburization coal power system coupled with a reversible Brayton cycle heat pump and a method thereof. The decarburization coal power system comprises a coal-fired power generation subsystem used for converting heat into electric energy, a decarburization subsystem used for treating carbon dioxide emission and a heat pump heat storage subsystem used for improving the energy utilization efficiency. Exhausted smoke of a boiler in the coal-fired power generation subsystem passes through a smoke steam cooler in the decarburization subsystem and then enters an absorption tower; the coal-fired power generation subsystem sends high-temperature steam generated by a boiler into the heat pump heat storage subsystem through a high-pressure cylinder and an intermediate-pressure cylinder, and the heat pump heat storage subsystem stores high-temperature molten salt after heat absorption into a high-temperature storage tank. The system has the beneficial effects that the heat pump heat storage subsystem is constructed through the reversible Brayton cycle, supercritical carbon dioxide is adopted as a cycle working medium, and a phase change material and molten salt are adopted as heat storage media, so that the energy storage density is improved, and the stability and high efficiency of the heat storage and release process are guaranteed; therefore, the system can better adapt to fluctuation of the power grid load, and quick response is realized.

The invention discloses a source and storage integrated low-carbon power generation system and an operation method. The system comprises a coal-fired power generation subsystem, a decarburization subsystem and a pump heat energy storage subsystem. In order to improve the operation flexibility and the energy efficiency level of the system, the system is optimized as follows: (1) in a low ebb of electricity consumption, electric energy is output to drive a compressor to pressurize and heat steam extracted by an intermediate-pressure cylinder, then molten salt is heated, and then the steam enters a reboiler after acting through an expansion machine; and finally, redundant electric energy is converted into heat energy of the fused salt to be stored. And (2) in the peak period of power utilization, the feed water from the deaerator is heated by the high-temperature fused salt stored in the fused salt storage tank and then enters the expansion machine to do work, so that the output of the decarburization coal-fired power generation unit is improved. And the extracted steam of the intermediate-pressure cylinder acts through the expansion machine and then enters the reboiler. And (3) normal-temperature water serves as a heat absorption working medium, waste heat in the decarburization process is sequentially absorbed according to the heat grade, and part of medium-pressure cylinder extraction steam is replaced under the action of the ejector to provide heat for the reboiler. According to the system, the carbon capture energy efficiency punishment is effectively reduced, and the operation flexibility is improved.

The embodiment of the invention provides a multi-steam-source cooperative frequency modulation combined heat and power generation system and a control method. The system comprises a boiler, a high-pressure cylinder, an intermediate-pressure cylinder, a low-pressure cylinder, a power generator, a multi-stage regenerative heater, a heating system and a heating steam supply pipeline. A main steam outlet of the boiler is connected to the high-pressure cylinder through a main steam pipeline, a steam exhaust port of the high-pressure cylinder is connected to the intermediate-pressure cylinder through a pipeline, a steam exhaust port of the intermediate-pressure cylinder is connected to the low-pressure cylinder through a pipeline, and a steam exhaust port of the low-pressure cylinder is connected to the generator through a pipeline. A condensate water outlet of the medium-pressure cylinder is communicated to a condensate water inlet of the boiler through a first condensate water pipeline; the heating system is communicated with a steam exhaust port of the medium-pressure cylinder through a heating steam supply pipeline; the multi-stage regenerative heater is arranged on the first condensate water pipeline and connected with the high-pressure cylinder and / or the intermediate-pressure cylinder through steam extraction pipelines, and steam extraction adjusting valves are correspondingly arranged on the steam extraction pipeline between the high-pressure cylinder and the multi-stage regenerative heater and / or the steam extraction pipeline between the intermediate-pressure cylinder and the multi-stage regenerative heater.

The invention relates to the technical field of oil well operation tools, in particular to a midway pressure test hydraulic oil drainage type tubing anchor and a using method thereof.The hydraulic tubing anchor comprises a center pipe, a cone connector, an anchor tile and a piston assembly, the cone connector is arranged at the top of the center pipe, and a sealing ring I is arranged between the cone connector and the center pipe for sealing; the center pipe is connected with an oil pipe through the cone connector, the anchor tile and the piston assembly are sleeved on the center pipe, the anchor tile is arranged between the cone connector and the piston assembly, one end of the anchor tile is provided with a cone hole matched with the cone connector, and the other end of the anchor tile is connected with the piston assembly. The oil drainage action can be completed by adopting a mode of directly pressing into the oil pipe, and any tool does not need to be put into the oil pipe; mainly solves the problem that in the operation process of an oil well, under the condition that a tubular column is not moved, the oil drainage function of the tubular column is realized, so that conventional well washing can be carried out, an oil tube and a sucker rod are cleaned together, and crude oil brought out and environment pollution caused by tube and rod lifting are reduced.

The invention relates to the technical field of compressed air energy storage power stations, and discloses a pipeline purging arrangement method for a large compressed air energy storage power station, which comprises the following steps of: taking out a throttling orifice plate, a nozzle, a valve core and a filter screen, and isolating and protecting a meter and a sensor; the first-section compressor serves as an air source, and a first-section compressor outlet pipeline and a first-section compression side emptying pipeline are purged; purging a second-section compressor outlet pipeline, a second-section anti-surge pipeline, a third-section anti-surge pipeline and a third-section emptying pipeline; blowing a third-section compressor outlet pipeline and a second-section emptying pipeline; a first-section compressor and a second-section compressor serve as air sources, and a pipeline behind a third-section compressor, an injection-production mother pipe, a high-pressure cylinder inlet pipeline and a pipeline in front of an inlet of a medium-pressure heat exchanger are purged; purging high-pressure and medium-pressure cylinder inlet pipelines and a low-pressure cylinder inlet heat exchanger pipeline; and high-pressure, medium-pressure and low-pressure cylinder inlet pipelines and exhaust pipelines are purged. The full-flow and multi-stage purging method of the compression side and the expansion side is adopted, the defects of a sectional purging arrangement method are overcome, and instability caused by the fact that a bypass air inlet channel is additionally arranged is avoided.

The invention discloses a vibration-CO2 corrosion coupling effect real-time monitoring system and monitoring method for a well cementation cement sheath of an oil and gas well in a high-temperature and high-pressure environment. The system comprises a kettle system which is fixed with a base of an axial loading system, and a push rod of the axial loading system extends into the kettle system from the center of a kettle cover and is pressed on a detected body; the CT detection system is mounted below a jack supporting plate of the axial loading system; the electrolytic corrosion system is connected with the lower end of a first embedded axial pipeline on the side wall of a kettle body in the kettle system so as to apply an experimental environment; the gas pressurization system is divided into two paths, one path is led into the kettle system from the lower part, and the other path is connected with the lower end of the second embedded axial pipeline; a sleeve of the kettle system is fixed in the kettle system, the nondestructive testing system is installed in the middle of the sleeve, and the vibration system in the sleeve is installed on the lower portion of the sleeve. According to the invention, axial loading, gas pressurization and heating devices are integrated, and an underground high-temperature and high-pressure environment is simulated; and CT and ultrasonic waves cooperate to realize multi-dimensional dynamic monitoring of the corrosion process.

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.

The invention discloses a system for assisting energy storage and peak regulation of a high-temperature hot water tank through fused salt and a control method, and belongs to the technical field of energy storage and peak regulation. The system comprises a unit power generation circulating system and a heat storage system. The heat storage system comprises a high-temperature hot water energy storage part and a fused salt energy storage part, and a high-temperature fused salt storage tank and a low-temperature fused salt storage tank are arranged in the fused salt energy storage part, so that part of heat of redundant steam of a boiler is stored in high-temperature fused salt when the unit operates at low load; the high-pressure and high-temperature steam after heat exchange with the high-temperature fused salt is bubbled in the water storage tank, water in the water storage tank is heated into high-temperature hot water, and therefore steam heat generated by the boiler is completely stored. When the unit is high in load and needs to release energy, high-temperature hot water in the high-temperature hot water tank is converted into saturated steam through the pressure reducer, then exchanges heat with the high-temperature fused salt and is heated into superheated steam, and the superheated steam enters the medium-pressure cylinder to expand and do work. The system can improve the peak regulation capacity of the unit and quickly realize the change of the unit response load.

The invention discloses a wind-light-coal-storage multi-energy complementary power station peak shaving system and an operation method. The system comprises a coal-fired power generation unit, an electric heating pump, a heat storage tank, a cold storage tank, a heat exchanger, wind power and photovoltaic power generation equipment, a power controller and the like. Redundant electric quantity of a power grid is consumed through a heat pump and converted into heat energy and cold energy in two qualities to be stored respectively in a power off-peak period, meanwhile, a high-temperature heat storage tank is adopted to store part of exhaust steam of a pressure cylinder in a steam turbine, part of condensed water of the steam turbine is heated through heat storage in a cascade mode in a power peak period, and meanwhile, cold storage release is matched with a high-vacuum-degree condenser; and the unit output is improved. According to the invention, power storage is replaced by cascade cold storage and heat storage, flexible and efficient peak regulation of the power station is realized, and the new energy power consumption level can be greatly improved.

Provided is a control method with which, in a plant combining a GTCC and a CO2 recovery device, it is possible to supply sufficient steam to the CO2 recovery device even during start-up of the GTCC. Specifically provided is a steam supply system for supplying steam generated in a heat recovery steam generator to a CO2 recovery device that recovers CO2 from exhaust gas discharged by a power generation plant, which includes a gas turbine, the heat recovery steam generator, and a steam turbine, wherein medium-pressure steam generated in the heat recovery steam generator is supplied to the CO2 recovery device during start-up of the power generation plant.

An accumulator assembly includes a medium pressure accumulator, having an MPA cavity including a brake-side passage and a pump-side passage. A nonpowered MPA fill valve is interposed fluidically between the pump-side passage of the MPA cavity and a source of pressurized hydraulic fluid. An MPA fill valve seat is located along an MPA fill valve fluid path. An MPA fill valve poppet is configured for reciprocal motion between a poppet rest position and a poppet closed position wherein an MPA fill valve poppet shoulder contacts the MPA fill valve seat to occlude fluid flow therepast. A powered MPA one-way valve is interposed fluidically between the brake-side passage and at least one corresponding wheel brake.

A water separator for use in an environmental control system of an aircraft includes an outer housing having an upstream end, a downstream end, and a central longitudinal axis. A plurality of vanes are arranged within the outer housing and are spaced about the central longitudinal axis. The plurality of vanes have an inlet end proximate to the upstream end and an outlet end proximate to the downstream end. An exterior edge of each of the plurality of vanes is in contact with an interior surface of the outer housing and a hollow channel is defined by an interior edge of the plurality of vanes. A plurality of flow channels is formed between the plurality of vanes and the outer housing. The plurality of flow channels has a spiral-like configuration about the central longitudinal axis.

The utility model discloses a system for efficiently preparing liquid nitrogen by using a two-stage membrane separation technology, and relates to the technical field of industrial purification and liquefied nitrogen. The membrane separation technology and the gas liquefaction technology are combined, so that nitrogen in air is purified, the residual pressure of medium-pressure gas is fully utilized to provide cold energy for high-concentration nitrogen liquefaction, and the residual potential energy of the high-concentration gas is utilized to improve the nitrogen generation efficiency. A compressor, a gas cooling module, a first-stage separator and a second-stage separator of the system are sequentially arranged in the flowing direction of air. A high-pressure outlet of the second-stage separator is communicated with a first hot end inlet of the first heat exchanger; a first outlet of the first heat exchanger is communicated with a hot end inlet of the second heat exchanger, a second hot end inlet is communicated with a side backpressure outlet of the first-stage separator, a second outlet is communicated with a cold end inlet of the second heat exchanger through an expansion machine, a third outlet is communicated with atmosphere, and the cold end inlet is communicated with a second outlet of the second heat exchanger; and a side backpressure outlet of the second-stage separator is communicated with the compressor.

A water separator for use in an environmental control system of an aircraft includes a body having a first upstream end, a second downstream end, and plurality of fluidly distinct flow channels extending between the first upstream end and the second downstream end. A flow of medium provided to the water separator is configured to flow through the plurality of fluidly distinct flow channels in parallel.

The invention belongs to the technical field of thermal power generating unit steam supply, and particularly discloses a thermal power plant coupling steam ejector and multi-heat-source fused salt heat storage steam supply system which comprises a thermal power generating unit body, a fused salt heat storage system and a steam supply system. And main steam and flue gas are used as heat sources for combined heat storage, on one hand, the main steam after heat release is used for extracting steam to supply low-parameter industrial steam, on the other hand, fused salt is used for storing heat to generate steam to eject a steam turbine intermediate-pressure cylinder to exhaust steam, and therefore high-parameter industrial steam is supplied, and the energy consumption is reduced. And peak regulation and heat supply tasks of the thermal power plant are synchronously met. According to the system, the deep peak regulation and industrial steam supply capacity of the thermal power generating unit is greatly improved, different steam supply parameter requirements can be met by adjusting parameters of the fused salt heat storage system and the structure of the ejector, flexible regulation and control of industrial steam supply of the thermal power generating unit are achieved, and the problems of a thermal power plant in the aspects of heat storage, peak regulation and steam supply are solved.

The application provides a multi-effect desalination system and relates to the technical field of multi-effect evaporation. The multi-effect desalination system can have two working conditions under the action of a first valve, a second valve and a third valve. The first working condition is that the third valve is closed, and the first valve and the second valve are opened. At this time, low-pressure steam discharged by a low-pressure steam generation device is directly introduced into a first-effect evaporator as heating steam. A second condenser can condense part of secondary steam generated by an mth-effect evaporator, so that the pressure in the first condenser and the second condenser is balanced, and the two can work under normal working conditions. The second working condition is that the second valve is opened, the first valve and the third valve are closed, and the second condenser stops working. Medium-pressure steam discharged from a medium-pressure steam generation device is introduced into the mth-effect evaporator to inject the secondary steam generated by the mth-effect evaporator through a steam heat compressor. After mixing, the medium-pressure steam is introduced into the first-effect evaporator as heating steam, so that the energy of the medium-pressure steam can be effectively utilized, and a higher water production ratio is obtained.

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 application discloses a device and method for preventing dry burning of a reheater of a waste heat boiler, and the device comprises a high-pressure blowing unit, a medium-pressure blowing unit, a low-pressure blowing unit and a reheater unit. The high-pressure blowing unit and the medium-pressure blowing unit can ensure that the reheater unit has steam flow in the whole blowing process, and the low-pressure blowing unit can stabilize the blowing pressure. The device and method can prevent the reheater from being in a dry burning state during blowing.

The invention relates to an on-line oil-free preparation system and method for compressed air with the high pressure of 45 MPa. The system and the method are long in service life, high in gas production pressure, high in automation degree, capable of being remotely controlled and capable of achieving oil-free compression and comprise a medium-pressure oil-free compression device, and the medium-pressure oil-free compression device is used for compressing free-state air to medium pressure; the drying and purifying device is used for filtering, adsorbing and drying the medium-pressure gas compressed by the medium-pressure oil-free compression device; the buffer device is used for buffering the medium-pressure air filtered and dried by the drying and purifying device; the supercharging device is used for carrying out secondary supercharging on the medium-pressure air in the buffer device; and the control system is used for carrying out power distribution on each device, carrying out process control according to a preset program, and monitoring and displaying operation parameters of each device.

Oscillating piston compressor (1) with medium pressure inlet (2), comprising in a housing (4) a cylinder (5) with a oscillating piston (3), wherein the oscillating piston (3) is rotatably mounted on an eccentric (6) of a drive shaft (7) and comprises a separating slide (8) rigidly connected to the oscillating piston (3), a pivot bushing (9) rotatably mounted in the housing (4) for linear guidance of the separating slide (8) in a separating slide guide (10), a low-pressure inlet (11) which is operatively connected to an inlet chamber (5a) in the cylinder (5), a medium pressure inlet (2) which is operatively connected to an outlet chamber (5b) in the cylinder (5), wherein the medium pressure inlet (2) comprises a first section (2a) with a check valve (13) in the housing (4), a second section (2b) in the oscillating bushing (9) and a third section (2c) in the separating slide (8), and a high-pressure outlet (12) which is operatively connected to the outlet chamber (5b) in the cylinder (5).

The present invention provides a dynamic balancing method for eliminating unstable vibration of the shafting, which can conveniently and effectively solve the abnormal vibration problems of high and intermediate pressure rotors commonly found in specific types of units. According to the shafting vibration characteristics of this type of unit, the method creatively adopts simultaneous counterweight addition on multiple balance planes inside and outside the high and intermediate pressure rotors, and uses a specific calculation method to eliminate the abnormal vibration of the high and intermediate pressure rotors caused by the decline of shafting stability through a single application of counterweight. This method minimizes the number of unit starts and stops during the vibration fault handling process, and is an effective dynamic balancing method for eliminating abnormal vibration of steam turbine generator units that has been proven through practice.

The utility model discloses an automatic bearing press-fitting machine which comprises a bottom plate which is horizontally arranged, and further comprises a cover plate which is vertically arranged on a top plate, a supporting rod is arranged between the bottom plate and the cover plate, an air cylinder is arranged on the bottom plate, a pressing column is arranged on the telescopic top of the air cylinder, and a roller mounting plate is arranged in parallel with the cover plate. According to the bearing press-fitting device, a bearing can be quickly press-fitted through the air cylinder, the problems that in the production process, the workload of bearing press-fitting is large, and consumed time is long are solved, main components are all connected through bolts, and the bearing press-fitting device is convenient to use and high in practicability. In the production process, bearings and roller accessories of corresponding models are replaced according to needs, and therefore the effect that the bearings and the roller accessories can be universally used in different models is achieved.

The invention relates to a method for controlling a thermal conditioning system (100) for a motor vehicle, comprising a refrigerant circuit (10) comprising:- A main loop (A) successively comprising:- a compressor (7),- a first exchanger (1) thermally coupled with an interior air flow (Fi),- a second exchanger (2),- A first bypass branch (B), - A second bypass branch (C), comprising a third exchanger (3) thermally coupled with an element (25) of an electric traction chain,- A third bypass branch (D) comprising a fourth exchanger (4) exchanging heat with the interior air flow (Fi), the method comprising the successive steps:- circulating refrigerant at high pressure in the first exchanger (1),- expanding the refrigerant to an intermediate pressure and circulating it in the third exchanger (3),- expand the refrigerant fluid to a low pressure and circulate it in the fourth exchanger (4). Abstract figure: Figure 3,

This refrigeration cycle device comprises: a low-stage compression unit (111) that discharges an intermediate-pressure refrigerant; intermediate-pressure cooling units (12, 13d, 14b); a high-stage compression unit (112) that suctions the intermediate-pressure refrigerant; a heat dissipation unit (16) that allows a high-pressure refrigerant discharged from the high-stage compression unit (112) to dissipate heat; low-pressure decompression units (14c, 14d); evaporation units (18, 19); and an internal high / low pressure heat exchange unit (17b). The high-stage compression unit (112) suctions the intermediate-pressure refrigerant cooled by the intermediate-pressure cooling units (12, 13d, 14b). The internal high / low pressure heat exchange unit (17b) exchanges heat between the high-pressure refrigerant flowing out from the heat dissipation unit (16) and a low-pressure refrigerant suctioned into the low-stage compression unit (111).