27 results about "Vapor-compression refrigeration" patented technology

This invention relates to a method and system for improving the performance of a vapor compression refrigeration cycle. It utilizes two cycles: Cycle A gains heat from a heat source, releases heat to a heat sink, and stores heat using a heat carrier; Cycle B does not gain heat from a heat source but gains heat through the cooling of the heat carrier and releases heat to the heat sink. By introducing a dual-cycle architecture and utilizing a heat carrier, this invention not only solves the problems of efficiency reduction and heating interruption caused by frosting but also achieves efficient cascaded energy utilization and continuous, stable system operation. This technology can be widely applied in air conditioning, heat pumps, refrigeration, and other fields, and is particularly suitable for high-energy-consuming scenarios such as high-temperature heat pumps and cryogenic systems with large temperature differences between the heat source and heat sink, demonstrating significant energy-saving potential and broad application prospects.

The utility model discloses a vapor compression refrigeration system, which is characterized by comprising a falling film evaporator, a falling film evaporator, a refrigerant inlet, a liquid outlet and an air outlet, the refrigerant inlet, the liquid outlet and the air outlet are arranged on the barrel, and the air outlet is communicated with an air inlet of a compressor; the condenser air inlet is communicated with the compressor air outlet; a refrigerant inlet of the evaporator is located in the top of the barrel, and a refrigerant distributor and a heat exchange pipe group are further arranged below the refrigerant inlet. The expansion machine is provided with an expansion machine liquid inlet and an expansion machine refrigerant outlet, the expansion machine liquid inlet is communicated with the condenser liquid outlet, and the expansion machine refrigerant outlet is communicated with the falling film evaporator refrigerant inlet. The heat exchange effect is improved, the refrigerant charging amount is reduced, meanwhile, the refrigerating capacity or the electric power consumption is not consumed, and high-efficiency operation of a refrigerating system is maintained.

The application discloses a solar refrigeration system with a cold storage function, comprising a solar absorption refrigeration device, wherein the solar absorption refrigeration device comprises a solar heat collector and an absorption refrigeration system, the absorption refrigeration system comprises a generator, a first condenser, a first throttling valve, a first evaporator and an absorber, steam or hot water generated by the solar heat collector is used as a heat source of the absorption refrigeration system, and the solar refrigeration system further comprises a vapor compression refrigeration device, a cold storage device and a controller. The solar refrigeration system with the cold storage function and the control method thereof can maximize utilization of solar energy resources and fully utilize the advantages of the absorption refrigeration system, and solve the problem of energy waste caused by closing the absorption refrigeration system or simultaneously starting the absorption refrigeration system and other mode refrigeration in the prior art.

The utility model discloses a cooling device for an electric control box of vapor compression refrigeration equipment, which relates to electric control box cooling equipment and comprises a capillary tube mechanism and a valve mechanism, and the capillary tube mechanism is used for being embedded in at least one side wall of the electric control box or fixedly attached to the inner surface of at least one side wall of the electric control box; an inlet of the capillary mechanism is connected with an outlet of the condenser, the valve mechanism is connected between the inlet of the capillary mechanism and the outlet of the condenser, and an outlet of the capillary mechanism is connected with an inlet of the evaporator. According to the utility model, the electric control box of the steam compression refrigeration equipment can be cooled while the original load is cooled by utilizing the steam compression refrigeration equipment, and meanwhile, the electric control box has a relatively closed space, so that the waterproof and dustproof capabilities of the electric control box are greatly improved.

The invention discloses a finite-time robust control method and system for the temperature of a chilled water outlet of an evaporator of a central air-conditioning system. The finite-time robust control method comprises the following steps that S1, a steam compression type refrigerating unit system model is built; s2, linearizing the system mathematical model based on the steam compression type refrigerating unit system model; and S3, an integral terminal sliding mode controller is adopted to achieve tracking error finite time convergence, and central air conditioning system evaporator chilled water outlet temperature control is achieved. Finally, through simulation verification, compared with a PID controller and an integral sliding mode controller, the method has more advantages in the aspects of suppressing buffeting and resisting various interferences.

The utility model belongs to the technical field of laser heat management, disclose a kind of single pump driven phase change cold storage laser heat management system, including refrigeration unit, cold storage unit and liquid supply unit three parts;Refrigeration unit uses vapor compression refrigeration cycle to generate cold, supply cold storage unit and liquid supply unit;The inside of cold storage unit is filled with solid-liquid phase change material as cold storage material to store cold, supply liquid supply unit;Liquid supply unit uses adjustable speed circulating pump to provide circulating power, improve rotational speed during laser operation to realize large-flow liquid supply, satisfy the heat exchange power demand of laser short-time high-power thermal load, reduce rotational speed during laser non-operation, match the power refrigeration heat exchange demand corresponding to homogenization after high-power thermal load.The utility model uses the advantage of solid-liquid phase change cold storage high energy storage density, improves the energy storage density of cold storage unit, reduces system volume, weight.

The application provides a refrigerator, comprising: a cabinet, which defines a first storage compartment and a second storage compartment; a vapor compression refrigeration system, comprising an evaporator; a Stirling refrigeration system, configured to supply cold to the second storage compartment; and a supply air duct, configured to connect the first storage compartment and the second storage compartment at two ends respectively, so that the airflow after heat exchange in the evaporator can be delivered to the second storage compartment through the supply air duct, thereby achieving the supply of cold to the second storage compartment by the vapor compression refrigeration system. The preservation temperature of the second storage compartment of the refrigerator of the application is widened; the supply of cold to the second storage compartment by the vapor compression refrigeration system is achieved by setting the supply air duct which connects the first storage compartment and the second storage compartment at two ends, and the structure is ingenious and easy to set.

The invention belongs to the technical field of combined refrigeration devices, and particularly relates to a diffusion absorption refrigeration and vapor compression refrigeration combined cycle device which comprises a compressor, a generator, a first condenser, a throttling valve, a first evaporator, a second condenser, a second evaporator, a gas heat exchanger, an absorber, a liquid storage device, a liquid heat exchanger and a hydrogen tank. The liquid storage device comprises a tank body; a liquid inlet channel and an air inlet pipe are arranged at the top of the tank body; a liquid outlet pipe is arranged at the bottom of the tank body; the air inlet pipe is communicated with an air spraying head; a turntable is rotationally and hermetically matched with the top of the jet head; and a group of nozzles are uniformly distributed on the surface of the turntable. When the mixed gas is discharged upwards through a nozzle of the gas spraying head, counter-acting force can be provided to drive the rotating disc to rotate at the top of the gas spraying head, so that bubbles which spirally move upwards are formed in the liquid inlet channel and mutually impact, mix and communicate with a dilute solution which moves downwards, and ammonia gas in the mixed gas is promoted to be fully absorbed in water.

The application discloses a vapor compression refrigeration system and a variable load control method, characterized by comprising a falling film evaporator, a cylinder body, a refrigerant inlet, a liquid discharge port and a gas outlet arranged on the cylinder body, the gas outlet being communicated with a compressor gas inlet; a condenser gas inlet being communicated with a compressor gas outlet; an evaporator refrigerant inlet being located at the top of the cylinder body, a refrigerant distributor and a heat exchange pipe group being further arranged below the refrigerant inlet; an expander, an expander liquid inlet and an expander refrigerant outlet being arranged, the expander liquid inlet being communicated with the condenser liquid outlet, and the expander refrigerant outlet being communicated with the falling film evaporator refrigerant inlet. While improving the heat exchange effect and reducing the refrigerant charging amount, the refrigeration system maintains high-efficiency operation without consuming refrigeration capacity or electric power consumption.

The utility model relates to the technical field of heat pumps, in particular to a heat pump device. The heat pump heating system aims at solving the problems that a traditional heat pump heating system is low in energy efficiency and even cannot work at the low environment temperature. In order to achieve the purpose, the heat pump device comprises a thermo-acoustic machine, a heat exchanger and a heat pump, the first heat exchanger exchanges heat with the cold end heat exchanger through a first secondary refrigerant; and the second heat exchanger exchanges heat with the hot end heat exchanger through a second refrigerating medium. According to the heat pump device, efficient heating at the low environment temperature is achieved, and compared with traditional steam compression refrigeration, the heat pump device has the obvious advantage in the working efficiency.

The invention discloses a ship cargo refrigeration energy-saving system and an operation method thereof. The ship cargo refrigeration energy-saving system comprises a steam compression refrigeration main system provided with a compressor, a condenser and an evaporator. The adsorption refrigeration unit is used for generating cold energy by utilizing exhaust of the main engine or waste heat of cooling water; the cold storage unit is mounted in the steam compression refrigeration main system or a storage rack structure in the refrigeration house and is used for storing and releasing cold energy according to the operation condition of the steam compression refrigeration main system; the condensation heat recovery module is communicated with the steam compression refrigeration main system and recovers part of condensation heat through a heat exchange loop for hot defrosting of an evaporator and oil heating of a compressor; and the intelligent energy control center automatically identifies the operation condition through a capability optimization algorithm, and adjusts the operation condition of the steam compression refrigeration main system, start and stop of the adsorption refrigeration unit and cold storage energy distribution. The operation modes can be automatically switched according to the external environment, the working condition of the main engine and the cooling and heating load change, and low-energy-consumption and high-stability goods refrigeration control is achieved.

The present application relates to the technical field of ship cabin cooling, and discloses a marine multi-mode cooling system, comprising a three-way valve one, a three-way valve two, a seawater direct heat exchange branch, a seawater pump driven heat exchange branch, a seawater compression refrigeration heat exchange branch and a controller. The seawater direct heat exchange branch comprises a cooling liquid pump and a flat plate heat exchanger arranged on a cabin bottom; the seawater pump driven heat exchange branch comprises a seawater pump and a seawater heat exchanger one; the seawater compression refrigeration heat exchange branch comprises an evaporator, a vapor compression refrigeration device and a seawater heat exchanger two; the controller is used for controlling the start-stop state of each heat exchange branch to perform separate or coupled heat exchange modes based on the cooling demand temperature of a user terminal device, and controlling the opening degree of the three-way valve one and the three-way valve two according to the liquid supply temperature difference of each heat exchange branch to adjust the cooling liquid shunt ratio and the seawater shunt ratio in each heat exchange branch. The present application solves the technical problems of high energy consumption, low reliability and ineffective cooperation of different cooling modes existing in the prior art.

The utility model relates to the technical field of hot runners, in particular to a steam compression type refrigerating capacity adjusting system. The system comprises a vapor compression type refrigeration system and a control system which is in electric signal connection with the vapor compression type refrigeration system and used for controlling and receiving all signals and equipment. The evaporator compression type refrigerating system comprises a compressor, an evaporator and a condenser, wherein the evaporator is connected with an inlet of the compressor through a pipeline, the condenser is connected with an outlet of the compressor through an output pipeline, and an outlet of the condenser is communicated with an inlet of the evaporator through a refrigerant pipeline. The control system has the beneficial effects that the electronic expansion valve is additionally arranged and is remotely controlled and adjusted, so that the loading and unloading control of the refrigerating system can be more accurately realized, the adjusting precision is higher, the cost is lower, and the performance is stable.

The invention discloses a refrigeration system division cooperative control method and system based on a dryness physical reference, and is suitable for a vapor compression refrigeration system and a heat pump system. The method comprises the following steps: acquiring a dryness value x of a condenser outlet; condensing side equipment is adjusted with x approaching 0 as a target, and a first control loop is formed; independently adjusting the frequency of the compressor according to the indoor load to form a second control loop; the two loops have no signal coupling and are indirectly cooperated through a refrigerant state. And the superheat degree of the evaporator is independently adjusted by the expansion valve and is compatible with the architecture. According to the invention, traditional coupling control is decoupled, the algorithm is simplified, the hardware cost is reduced, the energy efficiency is obviously improved, and the method is suitable for various cooling modes. According to the method, the EER of the system is expected to be increased to 3.4 or above, the energy-saving rate of 15% or above is achieved, and the method cooperates with an existing dryness detection device and a basic control method to form a complete technical system.

This invention discloses a multi-mode organic Rankine compression refrigeration cycle system based on solar energy utilization, comprising a high-pressure evaporator, an expander, a second clutch, a condenser, a working fluid pump, a low-pressure evaporator, a four-way reversing valve, a compressor, a first clutch, a generator, a solar collector, a water tank module, and a water pump module. The high-pressure evaporator, expander, condenser, and working fluid pump are sequentially connected to form an organic Rankine cycle subsystem; the compressor, condenser, and low-pressure evaporator are sequentially connected to form a vapor compression refrigeration subsystem; and the solar collector, water tank module, and water pump module are sequentially connected to form a solar thermal collection cycle system. Based on a solar-driven forward and reverse coupling system, this system combines the Rankine cycle and compression refrigeration cycle, adds a four-way valve, and integrates with solar energy and a hot water storage tank, making the system adjustable, saving investment costs, improving energy utilization, and meeting users' comprehensive needs for cooling, heating, and electricity.

A compressor waste heat-driven ORC-VCR coupled freeze-drying system and method are disclosed. The system includes an organic Rankine cycle module, a vapor compression refrigeration cycle module, a freeze-drying module, an air compression module, and a compression inlet precooling module. The organic Rankine cycle module consists of an ORC condenser, a two-stage turboexpander, an ORC evaporator, and a working fluid pump. The vapor compression refrigeration cycle module consists of a centrifugal compressor, a VCR condenser, a throttling valve, a drying heat exchanger, and a compression inlet precooler. The first-stage turboexpander is coaxially connected to the centrifugal compressor, and the second-stage turboexpander is coaxially connected to the working fluid pump. The freeze-drying module includes a freeze-dryer inlet precooler, a precooling gas-liquid separator, and a main gas-liquid separator. The air compression module recovers waste heat through a high-temperature water heat exchanger and provides a heat source for the organic Rankine cycle. The compression inlet precooling module achieves inlet precooling and gas-liquid separation. This invention solves the problem of compressor waste heat waste and improves system energy efficiency.

The application relates to a composite refrigeration range hood device, a composite refrigeration cycle system and a refrigeration method. The composite refrigeration range hood device can increase the refrigerating capacity of a vapor compression refrigeration module, improve the refrigeration energy efficiency ratio of the vapor compression refrigeration module, and simultaneously realize waste heat recovery and utilization of flue gas, improve energy utilization efficiency, and particularly can meet the refrigeration and cooling demand of the indoor environment of a kitchen during the cooking peak period in the summer high-temperature period.

The present invention relates to a high-power charging system including a cooling system for cooling a high-power power line for rapid charging of an electric vehicle, performing heat exchange by inserting a bare wire form power line into a cooling portion to be exposed to a low-temperature refrigerant environment, characterized by including: an electric vehicle charging connector; a power supply portion including a power line for supplying power to the connector; and a cooling system including a cooling portion through which a refrigerant for cooling the power line flows; wherein the power line is configured in a bare wire form without being wrapped, the cooling portion is formed in a structure in which the bare wire is directly inserted inside a refrigerant pipe through which the refrigerant flows, and the cooling system is formed of a vapor compression refrigeration cycle including a compressor and a condenser.

The application discloses a data center cold-heat integrated fluorine pump heat recovery system and a control method thereof, and belongs to the technical field of energy saving. The system comprises a data center waste heat heating system, a fluorine pump natural cooling system and a vapor compression refrigeration system. The data center waste heat heating system is used for recovering waste heat from data center return water and increasing the waste heat temperature to heat a heat user. The fluorine pump natural cooling system and the vapor compression refrigeration system are both used for absorbing waste heat in the data center return water to provide cold energy for the data center to meet the cooling demand of the data center under different working conditions in the whole year. The application makes full use of the data center waste heat and outdoor natural cold source to further reduce the cooling energy consumption of the data center while meeting the refrigeration demand of the data center and the heating demand of the heat user. In addition, the application also uses an integrated valve which can meet the variable working condition and multi-mode operation demand of the system, thereby reducing the number of valves and control difficulty and facilitating the installation and management of the system.

A refrigerant circuit includes a compressor that compresses refrigerant and an expansion mechanism that decompresses refrigerant. The refrigerant circuit configures a vapor compression refrigeration cycle in which the refrigerant circulates. The adsorbent adsorbs and desorbs the refrigerant circulating in a first unit. The refrigerant circuit includes a high-pressure region and a low-pressure region. The refrigeration cycle apparatus is operated under at least one of a first condition and a second condition. In the first condition, the refrigerant in the high-pressure region has a pressure lower than or equal to a critical pressure of the refrigerant, and the refrigerant in the high-pressure region has a temperature exceeding a critical temperature of the refrigerant. In the second condition, the refrigerant in the low-pressure region has a pressure lower than a saturation pressure corresponding to an evaporation temperature of the refrigerant in a case where the adsorbent neither adsorbs nor desorbs the refrigerant.

This invention discloses a combined cycle refrigeration system and its operating method suitable for all-electric aircraft, belonging to the field of environmental control for all-electric aircraft, and meeting the environmental control requirements of all-electric aircraft in many ways. The system is driven by onboard electrical power and consists of a combination of a vapor compression refrigeration cycle, an air expansion refrigeration cycle, and a liquid cooling cycle. The onboard motor drives the vapor compression refrigeration cycle to replace ram gas as the cold source, while an electric compressor compresses ambient air as the high-pressure air source required for the air expansion refrigeration cycle. The liquid cooling cycle and the air expansion refrigeration cycle are used to cool and regulate the equipment compartment and cockpit respectively. Simultaneously, the cockpit return air is mixed with ambient bleed air to participate in the air expansion refrigeration, forming a closed loop, effectively reducing the bleed air volume requirement.

The invention discloses a large alkaline electrolysis water system based on compressed steam refrigeration cycle. The system comprises an alkaline electrolysis water hydrogen production system, a steam compression type refrigeration cycle system, a gas purification system and a waste heat utilization system. The water electrolysis hydrogen production and waste heat utilization system is used for electrolyzing water, producing hydrogen and oxygen, carrying out steam-water separation, washing and cooling separated gas, removing water, removing impurities in alkali liquor at an inlet of an electrolytic bath, providing waste heat produced by water electrolysis into the deoxidation system, and heating the alkali liquor at the inlet of the electrolytic bath in the circulation loop at the same time. The compression type refrigeration cycle system cools a gas-liquid mixture through flowing of a refrigerant in the system and heats hydrogen at an inlet of the regeneration drying tower, so that the temperature of the hydrogen at the inlet is increased. And the gas purification system is used for deoxidizing and drying the hydrogen to finally obtain high-purity hydrogen. According to the invention, the loss of alkali, water, heat and electric energy in the water electrolysis process is reduced, and the energy utilization rate of the whole hydrogen production system is improved.

The present invention relates to a high-output charging system which includes a cooling system for cooling a high-output power line for rapid charging of an electric vehicle and in which a power line in the form of a bare wire is inserted into a cooling unit and exposed to a low-temperature refrigerant environment, thereby undergoing heat-exchange, the high-output charging system being characterized by comprising: a connector for charging an electric vehicle; a power supply unit including a power line for supplying electricity to the connector; and a cooling system including a cooling unit through which a refrigerant for cooling the power line flows, wherein the power line is configured in the form of an uncoated bare wire, the cooling unit is formed in a structure in which the bare wire is directly inserted into a refrigerant pipe through which the refrigerant flows, and the cooling system forms a vapor compression refrigeration cycle including a compressor and a condenser.

This application relates to the field of marine air conditioning technology and discloses a heat recovery marine air conditioning system. The system includes an air handling module, a solution circulation module, a vapor compression refrigeration module, and a negative pressure regeneration module. The air handling module contains a membrane dehumidification unit and a sensible heat evaporator connected in series, respectively handling dehumidification and cooling loads; the sensible heat evaporator operates under dry conditions. The condensation heat recovery unit of the vapor compression refrigeration module is connected to the solution pipeline, using condensation waste heat for primary preheating of the dilute solution. The negative pressure regeneration module utilizes a seawater hydraulic jet to establish a negative pressure environment and introduces main engine scavenging cooling water as a secondary heat source to drive solution regeneration. This invention eliminates the risk of condensate runoff through decoupled temperature and humidity control, utilizes condensation waste heat and scavenging waste heat to achieve cascaded regeneration of the solution, significantly reducing compressor power consumption and system energy consumption, and realizing freshwater resource recovery.

The invention relates to the technical field of water cooling equipment, and provides mixed type water cooling equipment which comprises a steam compression refrigeration cycle system which comprises a first evaporator and a second evaporator and further comprises a grinding fluid open type circulation water path system and a spindle water closed type circulation water path system. The open type grinding fluid circulating waterway system is used for open type circulation of grinding fluid and heat exchange with the vapor compression refrigeration circulating system, and comprises a water tank I, a liquid pump I and a water outlet pipe I; and the main shaft water closed type circulating waterway system is used for closed type circulation of main shaft cooling liquid and heat exchange with the steam compression refrigeration circulating system, and the main shaft water closed type circulating waterway system comprises a second water tank, a second liquid pump and a second water outlet pipe. By means of the technical scheme, the technical problem that in the prior art, in the silicon wafer or wafer grinding process, high-precision temperature control is inconvenient to conduct on grinding liquid and main shaft cooling liquid separately is solved.

A vapor compression refrigeration apparatus comprises a compressor (4) of the centripetal radial type. The compressor (4) comprises a case (7), a shaft (8) mounted in the case (7) and supported in the case (7) so that it can rotate around an its own main axis (X-X), a single rotor disk (9) solidly mounted on the shaft (8), coaxial to the main axis (X-X) and comprising at least one array of rotor vanes (17a, 17b, 17c) arranged on one front face of said rotor disk (9) and around the main axis (X-X). Leading edges of the stator vanes (17a, 17b, 17c) face opposite to the main axis (X-X) and extend parallel to said main axis (X-X).

The present application belongs to the technical field of vehicle-mounted laser weapon thermal management, and particularly relates to a vehicle-mounted laser weapon thermal management system and a working method. The system comprises a low-temperature heat dissipation circulation unit, a weapon heat dissipation circulation unit and a vapor compression refrigeration circulation unit. The system uses a phase change heat storage material as an intermediate heat storage device, uses a power battery as a partial power source, uses an evaporator to circulate heat dissipation for the low-temperature heat dissipation circulation unit, and realizes efficient heat dissipation management of the laser weapon and the power supply in a small space of a vehicle through a combined thermal control scheme of the phase change heat storage device and the evaporator, which helps to promote the application of the laser weapon in the vehicle field.