57 results about "Vapor-compression refrigeration" patented technology

The utility model discloses an air conditioning system matched with a cryogenic liquid gasification process. The air conditioning system comprises a first gasifier, a liquid outlet pipe, an air supply pipe, a cooling liquid supply pipe, a cooling liquid return pipe, a heat exchanger, a fan, a controller, an environment temperature sensor, a circulating liquid inlet pipe, a circulating liquid outlet pipe, a cooling liquid supply source, a cooling liquid temperature sensor and a circulating pump. The air conditioning system can utilize cold energy generated by gasification of cryogenic liquid to refrigerate, is particularly suitable for cryogenic liquid tank trucks using the cryogenic liquid as power fuel, can replace a traditional vehicle-mounted air conditioner to refrigerate, can also realize a heating function, eliminates a high-power-consumption part, namely a compressor, necessary for conventional vapor compression refrigeration cycle, and is energy-saving and environment-friendly. Therefore, the energy consumption can be greatly reduced, and considerable energy-saving and emission-reducing benefits are brought; and only cooling liquid is used as a refrigerant medium for transferring cold energy, the functions of cooling, heating and cryogenic liquid gasification of the air conditioner can be achieved only through one medium, the structure is simple, and the cost is low.

The invention provides an energy storage battery liquid cooling dual-mode heat management and battery storage space heat recovery temperature and humidity coordinated regulation and control system and method. The system is composed of a heat pipe cooling module, a steam compression refrigeration cycle module and a module for waste heat recovery and runner regeneration. The heat pipe cooling module and the circulating pump form a natural cooling loop through the liquid cooling plate and the heat pipe heat exchanger; the vapor compression refrigeration cycle module efficiently and rapidly reduces the temperature of cooling liquid through a phase change refrigeration working medium. And the waste heat recovery module uses condensation waste heat for rotary wheel dehumidification regeneration. The system automatically switches double modes according to the temperature of cooling liquid: heat pipe energy-saving cooling is started when the temperature is lower than or equal to 35 DEG C, steam compression refrigeration is switched when the temperature is higher than 35 DEG C, and condensation waste heat of the two modes preheats regenerated air through a heat pipe heat exchanger, then the temperature is supplemented to the regeneration temperature through an electric heater, a rotating wheel is driven to dehumidify, and dry air is fed into a battery cabin. The method gives consideration to energy efficiency and thermal safety, and is suitable for thermal management and space humidity regulation and control of an energy storage battery system.

The invention provides a multi-mode combined cooling and power generation system based on efficient waste heat utilization and an operation method of the multi-mode combined cooling and power generation system. The multi-mode combined cooling and power generation system comprises an organic Rankine cycle and absorption type refrigeration cycle integrated low-grade cold energy production mode and an organic Rankine cycle and vapor compression type refrigeration cycle integrated medium-grade cold energy production mode. A high-grade cold energy production mode integrating organic Rankine cycle, absorption type refrigeration cycle and vapor compression type refrigeration cycle is adopted, in order to achieve gradient utilization of waste heat, the system considers the waste heat utilization sequence of thermodynamic cycle at the same time, and the waste heat is firstly utilized by the absorption type refrigeration cycle and then recovered by the organic Rankine cycle; waste heat is recycled through the organic Rankine cycle and then is utilized by the absorption type refrigeration cycle, and the waste heat is simultaneously recycled by the absorption type refrigeration cycle and the organic Rankine cycle after being shunted. Efficient cogeneration of cold electricity is achieved through gradient utilization of waste heat and heat-work coupling between circulation, multiple possibilities of a waste heat utilization path are considered, and the waste heat recovery rate is increased.

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 invention belongs to the technical field of laser heat management, and discloses a single-pump-driven phase change cold storage laser heat management system which comprises a refrigeration unit, a cold storage unit and a liquid supply unit. The refrigeration unit generates cold energy through vapor compression refrigeration cycle and supplies the cold energy to the cold storage unit and the liquid supply unit; the cold storage unit is filled with a solid-liquid phase change material as a cold storage material to store cold energy, and the cold energy is supplied to the liquid supply unit; the liquid supply unit adopts a speed-adjustable circulating pump to provide circulating power, the rotating speed is increased during the working period of the laser, large-flow liquid supply is achieved, the heat exchange power requirement of the short-time high-power heat load of the laser is met, the rotating speed is reduced during the non-working period of the laser, and the corresponding low-power refrigeration heat exchange requirement after homogenization during the high-power heat load is matched. The advantage of high energy storage density of solid-liquid phase change cold storage is utilized to the maximum extent, the energy storage density of the cold storage unit is improved, and the size and weight of the system are reduced.

This invention provides a control method for a refrigeration and freezing device and the refrigeration and freezing device itself. The refrigeration and freezing device includes a housing defining a cryogenic compartment, a vapor compression refrigeration system for cooling the cryogenic compartment, and a Stirling refrigeration system. The control method includes: when the temperature of the cryogenic compartment is greater than or equal to a set cryogenic temperature, determining whether the compartment temperature is greater than or equal to a preset switching temperature; if yes, controlling the vapor compression refrigeration system to cool the cryogenic compartment and stopping the Stirling refrigeration system from cooling the cryogenic compartment; if no, controlling the Stirling refrigeration system to cool the cryogenic compartment and stopping the vapor compression refrigeration system from cooling the cryogenic compartment. This not only improves the overall cooling efficiency of the refrigeration and freezing device to the cryogenic compartment but also reduces the energy consumption of the refrigeration and freezing device and extends the service life of the Stirling refrigeration unit.

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.

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.

The present invention discloses a Carnot battery system based on phase-change cold storage and energy storage and a multi-mode operation method thereof. The Carnot battery system includes a vapor compression refrigeration unit, a phase-change cold storage device and a power circulation unit. In the charging stage, the vapor compression refrigeration unit is used to generate cold energy using off-peak electricity; in the energy storage stage, the cold energy produced by the vapor compression refrigeration unit is stored at a high density by the phase-change cold storage device; in the discharging stage, the stored cold energy is used as a cold source and the external low-temperature waste heat is used as a heat source, and the power circulation unit is used to simultaneously utilize the cold and heat energy for heat-work conversion to release electrical energy; the Carnot battery system proposed in the present invention can improve the round-trip efficiency and energy storage density of the energy storage system, reduce the energy storage cost, and contribute to large-scale long-term energy storage; the multi-mode operation method proposed in the present invention can make full use of different types of low-temperature heat sources through the scheduling of the phase-change cold storage device and the charge and discharge cycle to meet the cold and electricity energy needs of the user side.

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 present invention provides a control method for a refrigeration and freezing device, and the refrigeration and freezing device. The refrigeration and freezing device includes a housing defining a cryogenic chamber, a vapor compression refrigeration system, and a Stirling refrigeration system for providing cooling to the cryogenic chamber. The control method includes determining whether the chamber temperature of the cryogenic chamber is greater than or equal to a set cryogenic temperature; if so, controlling the vapor compression refrigeration system and the Stirling refrigeration system to alternately provide cooling to the cryogenic chamber, so that both systems are in optimal operating conditions. This not only improves the overall cooling efficiency of the refrigeration and freezing device for the cryogenic chamber, but also reduces the energy consumption of the refrigeration and freezing device, extending the service life of the compressor and the Stirling refrigerator.

The ultralow-temperature refrigerator comprises the pulse tube refrigerator, the thermosiphon and an ultralow-temperature refrigerator heat insulation shell, and the pulse tube refrigerator comprises an oil-free linear compressor, a connecting pipe, an after-stage cooler, a heat regenerator, a cold end heat exchanger, a pulse tube, a hot end heat exchanger, an inertia pipe and a pulse tube refrigerator gas reservoir. The thermosiphon comprises a thermosiphon air reservoir, a thermosiphon connecting pipe, a thermosiphon descending section and a thermosiphon ascending section. By utilizing the advantages of environmental protection, energy conservation and no horizontal vibration of the linear opposed pulse tube refrigerating machine, the problems of high energy consumption of a traditional cascade steam compression refrigerating system and unstable vibration operation of other novel refrigerating machines are solved. And the problem of low heat exchange efficiency caused by insufficient heat exchange is solved by utilizing the bent pipeline at the descending section of the thermosiphon. The problem that the ultralow-temperature refrigerator is unstable and unsafe when the refrigerating machine is shut down is solved by utilizing the advantage that the thermosiphon air reservoir is added to relieve overlarge pressure in the thermosiphon when the refrigerating machine is shut down.

The invention relates to an electric vehicle charging system (10) comprising a charging connector (14) configured to receive a charging cable (18). The charging cable (18) and / or the charging connector (14) provide means (46) for guiding a coolant, cooling the charging cable (18) and / or the charging connector (14). The electric vehicle charging system (10) further comprises a thermal management unit (26) for cooling the coolant. The thermal management unit (26) comprises a vapor compression refrigeration system (30) for cooling the coolant below ambient temperature.

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.

Vapor compression refrigeration plant with refrigerant fluid consisting of carbon dioxide or mixtures thereof and of the type comprises a fluid circulation circuit provided with: at least one compressor group (21, 54); a first heat exchanger (22) having at least one outflow branch (35) to the inlet of which the outlet of at least one compressor group (21, 54) is connected, where this first exchanger (22) is assigned to the transfer of heat from the fluid to a source or user; a second heat exchanger (23) having an overheating branch (31) and a heat transfer branch (32) in mutual thermal connection, where an inlet of the heat transfer branch (32) is connected to the outlet of the outflow branch (35) of the first exchanger (22), where an outlet of the overheating branch (31) of the second exchanger (23) is connected to at least one compressor group (21, 54); a receiving element (28) provided with an inlet (44) for the fluid connected at least to the outlet of the heat transfer branch (32) of the second exchanger (23) and provided with a liquid outlet (45) and a vapor outlet (46), the latter connected to the inlet of the overheating branch (31) of the second exchanger (23) and / or to at least one compressor group (21, 54); a lamination device (24) an inlet of which is connected to the liquid outlet (45) of the receiving element (28); an evaporator (25) having at least one evaporation branch (38) an inlet of which is connected to an outlet of the lamination device (24), the outlet of such evaporation branch (38) is connected to the inlet of the receiving element (28) or to the inlet of the overheating branch (31) of the second exchanger (23), where this evaporator (25) is assigned to the transfer of heat from a source or user to the fluid. The outlet of the outflow branch (35) of the first exchanger (22) is connected to the inlet of the heat transfer branch (32) of the second exchanger (23) and to the inlet (44) of the receiving element (28) by means of a remote control valve (26) having an inlet (41) connected to said outlet of the outflow branch (35), a first outlet (42) connected to said inlet (44) of the receiving element (28), and a second outlet (43) connected to said inlet of the heat transfer branch (32).

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 application discloses a multi-supply system and method integrating Carnot cell energy storage and liquid hydrogen cold energy, comprising a vapor compression refrigeration cycle charging system, a Rankine cycle discharging system, a low-temperature energy storage system, a high-temperature energy storage system, a liquid hydrogen cold energy utilization system, a fuel cell waste heat utilization system and a liquid hydrogen pipeline; the charging system comprises a first compressor, a first condenser, a second compressor, a second condenser, a first throttling valve and a first evaporator which are sequentially connected in a circulation mode; the high-temperature energy storage system is in heat exchange with the discharging system through a second evaporator and a third evaporator; the low-temperature energy storage system is in heat exchange with the charging and discharging systems through a first evaporator and a third condenser respectively; and the liquid hydrogen cold energy utilization system realizes a liquid hydrogen gasification cold energy power generation process. The application utilizes liquid hydrogen cold energy and fuel cell waste heat to construct a high-efficiency comprehensive energy system.

To solve the problem in a vapor compression type refrigeration cycle which can adjust ability by changing the circulation amount of a refrigerant, but in which it is necessary to change the adsorption amount or desorption amount of the refrigerant in order to adjust ability in an adsorption type refrigeration cycle.SOLUTION: A refrigerating device 100 comprises a refrigerant flow passage 111, a compressor 131, an adsorbent, a first adsorber 133, a second adsorber 134, and a control unit 105. The compressor 131 sucks and compresses a low-pressure refrigerant, and discharges it as a high-pressure refrigerant. The adsorbent adsorbs and desorbs a refrigerant in accordance with a pressure change of the refrigerant. The first adsorber 133 and the second adsorber 134 are connected to a discharge side or a suction side of the compressor 131, so that when the adsorbent adsorbs and desorbs the refrigerant, generated heat or cold is recovered. The control unit changes an operation mode. In a first operation mode, a difference between the pressure of the high-pressure refrigerant and the pressure of the low-pressure refrigerant is a first value. In a second operation mode, the difference is a second value different from the first value.SELECTED DRAWING: Figure 4

A vapor compression refrigeration cycle device includes a main refrigerant circuit formed by sequentially connecting a compressor, a use-side heat exchanger, an intermediate heat exchanger, a first expansion device, and a heat source-side heat exchanger to one another through a refrigerant pipe; a bypass refrigerant circuit which branches off from the refrigerant pipe located between the use-side heat exchanger and the first expansion device, and which is formed by sequentially connecting a second expansion device, the intermediate heat exchanger, and a compression midstream of the compressor; and a controller. When a pressure ratio of discharge pressure of refrigerant discharged from the compressor and suction pressure of refrigerant sucked into the compressor is equal to or smaller than a reference pressure ratio, the controller is configured to control the compressor such that the number of rotations of the compressor is increased.

Certain example embodiments provide a vapor compression refrigeration system, comprising: a compressor configured to suction refrigerant at a low pressure and temperature from a suction return, compress the refrigerant, and output refrigerant at a higher pressure and temperature; a condenser configured to cool refrigerant received from the compressor as the refrigerant passes though coils in the condenser; an expansion device configured to reduce the pressure of the refrigerant received from the condenser; and an evaporator configured to allow the refrigerant received from the expansion device to absorb heat surrounding the evaporator. The system may include a plurality of sensors configured to measure temperature of the system and a controller configured to control, based on the signals from one or more sensors, operation of the compressor and / or an evaporator fan motor configured to allow the refrigerant received from the expansion device to absorb heat surrounding the evaporator.

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 utility model belongs to the technical field of water drinking equipment, and particularly provides water drinking equipment. The utility model aims to solve the problem that the current hot water equipment provided with a steam compression type refrigerating system still consumes more electricity. The water drinking equipment comprises a hot water container used for containing hot water, a cold water container used for containing cold water and a steam compression type refrigerating system. The vapor compression type refrigerating system comprises a compressor, a condenser, an evaporator, a throttling pressure reduction component, a heat exchanger and a control valve set. The condenser is thermally connected with the hot water container to heat water in the hot water container. The evaporator is thermally connected with the cold water container to cool water in the cold water container. The control valve set is used for enabling the heat exchanger to be connected to the upstream or the downstream of the throttling and pressure reducing component in series on the flowing path of a refrigerant in the steam compression type refrigerating system, so that the refrigerant circularly flowing in the steam compression type refrigerating system flows through two of the condenser, the evaporator and the heat exchanger. The utility model solves the technical problems.

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 provides a secondary refrigerant loop coupled airborne multi-temperature-zone refrigerating device and a simulated annealing method thereof. The device comprises a double-evaporator steam compression type refrigerating system, a secondary refrigerant circulation loop, a semiconductor assembly, a multi-temperature-zone box body, a control element and a central processing unit. The hot ends of the three semiconductor assemblies are subjected to double cooling through an air cooling head and a water cooling head, and a cold end radiator cools air in a plurality of temperature zone box bodies. Through coupling application of vapor compression refrigeration and semiconductor refrigeration, efficient collaborative refrigeration of multiple temperature zones is achieved; the control element receives signals of the pressure sensor and the temperature sensor to control the opening degree of the electronic expansion valve, the frequency of the compressor and the current of the semiconductor refrigeration chip. The central processing unit performs global optimization search on the intermediate pressure of the double-evaporator vapor compression type refrigeration system by using a simulated annealing method, so that the overall performance of the refrigeration device and the utilization efficiency of energy are improved.