54results about "Refrigeration machines" patented technology

The invention relates to a temperature control device (1) for temperature control of a fluid, comprising: at least one fluid supply (11), at least one fluid discharge (12), and at least one fluid transport element (13), wherein the fluid transport element (13) comprises a drive (131) and at least one fluid conveying element (132) connected to the drive (131), and the drive (131) moves the fluid conveying element (132) as required, wherein the fluid conveying element (132) is in contact with the fluid at least partially, and when the drive (131) is activated, the fluid conveying element (132) transports fluid from the fluid supply (11) to the fluid discharge (12). The fluid conveying element (132) comprises an elastocaloric material at least partially. The invention also relates to a vehicle with a temperature control device (1) and a method for temperature control of a fluid.

To provide an organic Rankine cycle cooling system that can use refrigerant heat in an organic Rankine cycle as a heat source for driving an external combustion engine without requiring heat supply from the outside.SOLUTION: An organic Rankine cycle cooling system 1 cools a cooling object in a circuit that uses an organic material as coolant, wherein the coolant circulates while repeating evaporation and condensation, and the organic Rankine cycle cooling system comprises: a compressor 2 that compresses the coolant to increase the temperature of the coolant; a condenser 5 that cools and condenses the coolant; and an external combustion engine that is provided on the downstream side of the compressor 2 and on the upstream side of the condenser 5. The cooling object is arranged on the downstream side of the condenser 5 and on the upstream side of the compressor 2, and performs heat exchange with the cooled coolant. The external combustion engine operates with the coolant passing through the compressor 2 as a heat source.SELECTED DRAWING: Figure 1

The application discloses a low-grade heat energy recycling refrigeration and power generation integrated system and a working method thereof. The system comprises a heat energy-mechanical energy conversion unit, an elastic heat refrigeration unit, a power generation energy storage and driving unit, a mode switching mechanism and a system control module. The heat energy-mechanical energy conversion unit is used for converting low-grade heat energy into reciprocating mechanical work; the elastic heat refrigeration unit is used for generating a refrigeration effect by using mechanical energy; the power generation energy storage and driving unit is used for converting mechanical energy into electrical energy storage and converting the electrical energy into mechanical energy output; the mode switching mechanism is used for realizing coupling and disconnection among the mechanisms; and the system control module is used for controlling the running state and mode switching of each executing mechanism. The application realizes efficient step-by-step utilization of low-grade heat energy by integrating the above executing mechanisms and flexibly switching three working modes. Moreover, all auxiliary equipment is driven by the electrical energy generated by the system itself, without external power grid input, so that off-grid independent operation is realized.

The application provides a radiation refrigeration, solar power generation and thermoelectric power generation integrated system, and relates to the technical field of power generation integrated systems.The system comprises a plurality of single subsystems and an angle controller, each of the subsystems comprises a radiator, a thermoelectric generator and a solar cell, the radiator at the upper side acts as a cold end, the solar cell at the lower side acts as a hot end, and the thermoelectric generator is arranged between the radiator and the solar cell; the angle controller controls the pitch angle and the azimuth angle of the subsystem according to the solar zenith angle in use, so that the solar energy reflected by the radiator in each subsystem is transmitted to the solar cell in the next subsystem for collection. Through the integration of radiation refrigeration, solar cells and thermoelectric generators, on the basis of collecting the reflected radiation of the radiation refrigeration by the solar cell, the waste heat on the side of the solar cell and the cold quantity on the side of the radiation refrigeration are further effectively utilized through thermoelectric conversion, and the overall energy utilization efficiency of the system is improved.

Embodiments described herein relate to a self-adaptive thermal management system. The thermal management system includes a first body, a second body, and a third body. The second body has a first layer and a second layer formed from a Weyl semimetal and a third layer sandwiched between the first layer and the second layer. The third layer is formed from a vanadium dioxide film. The second body is spaced apart from the first body. The third body is spaced apart from the second body. The second body is a modulator configured to transition between a metallic phase and an insulating phase dependent on a temperature to regulate a heat from the first body to the third body through the second body in a self-adaptive manner dependent on the temperature.

This invention discloses a high-strength passive daytime radiation cooling film and its preparation method, belonging to the field of functional polymer materials and thermal management technology. The film has a bilayer composite structure, including an upper reflective layer and a lower emitting layer. This invention employs an integrated process of melt blending-lamination-biaxial stretching-induced phase separation-extraction pore-fixing. Through a process design of stretching followed by extraction and a hierarchical biaxial stretching strategy, it achieves highly oriented molecular chains to enhance mechanical properties while precisely constructing a multi-level structure with both nanopores and micropores. The resulting film exhibits an average reflectivity >93% in the solar radiation band (0.25–2.5 μm), an average emissivity >95% in the atmospheric window (8–14 μm), a thermal conductivity <0.1 W / (m·K), and a tensile strength >30 MPa. This invention solves the technical bottleneck of achieving high reflectivity, high emissivity, low thermal conductivity, and high strength simultaneously in radiation cooling materials, and can be widely applied in building energy conservation, outdoor equipment thermal management, and electronic device heat dissipation.

The present application relates to a kind of cooling water-saving coupling refrigeration film based on bionic micro-nano structure and its preparation method, belong to the technical field of facility agriculture covering material.To solve the problem that existing technology cannot realize efficient refrigeration, atmospheric water collection, green preparation and agricultural adaptation simultaneously, the present application provides a kind of cooling water-saving coupling refrigeration film based on bionic micro-nano structure, including flexible composite substrate, the surface of flexible composite substrate has regularly arranged micro-pyramid array structure, and the inside of flexible composite substrate is uniformly dispersed with nano-particle of high emissivity to infrared light and high transmissivity to visible light;The top of micro-pyramid array is hydrophilic area, and the body and substrate are hydrophobic area, to form hydrophilic and hydrophobic hetero micro area.The present application has excellent radiative refrigeration, high-efficiency water collection capacity, self-cleaning weather resistance through bionic micro-nano structure and function synergistic design, preparation process is simple and controllable, energy-saving emission-reduction benefit is remarkable, adapts greenhouse application, and has practicality and industrialization potential.

This invention belongs to the field of building materials technology and relates to a radiation-cooled paving brick and its preparation method. The radiation-cooled paving brick comprises, from bottom to top, a base layer, a functional layer, and a surface layer. The functional layer comprises, by weight, the following raw material components: 20-50 parts cement-based binder, 20-50 parts radiation-cooling functional filler, 0-30 parts aggregate, 0.5-2.5 parts admixture, and 0.1-0.5 parts reinforcing fiber. Both the functional layer and the base layer of this invention are cement-based materials, resulting in strong bonding. Through the synergistic effect of the functional filler in the functional layer and the cement hydration products with radiation-cooling function, and with the surface coated with an inorganic nano-high-hardness self-cleaning surface layer, a highly efficient and long-lasting radiation-cooling effect can be achieved.

The application discloses a direct expansion type radiation cooling terminal, a dew prevention method and a cooling system, and mainly relates to the technical field of building air conditioners and radiation cooling. The application discloses a direct expansion type radiation cooling terminal, a dew prevention method and a cooling system, and mainly relates to the technical field of building air conditioners and radiation cooling. The application discloses a direct expansion type radiation cooling terminal, a dew prevention method and a cooling system, and mainly relates to the technical field of building air conditioners and radiation cooling. The application discloses a direct expansion type radiation cooling terminal, a dew prevention method and a cooling system, and mainly relates to the technical field of building air conditioners and radiation cooling. The application discloses a direct expansion type radiation cooling terminal, a dew prevention method and a cooling system, and mainly relates to the technical field of building air conditioners and radiation cooling.

The application discloses a radiation cooling device based on an optical film, comprising a substrate, an optical film with high visible light transmittance and high infrared emissivity arranged on one side of the substrate, the optical film comprising an infrared reflection layer arranged on the substrate and an optical antireflection film arranged on the surface of the infrared reflection layer; the transmittance of the device in the visible light band is above 60%, and the emissivity in the atmospheric window band is above 50%. The radiation cooling device based on the optical film has simple structure and good stability, and is suitable for large-scale and low-cost production; the good thermal conductivity of silicon carbide and the high visible light transmittance and high infrared emissivity after regulation and control enable the silicon carbide to be applied to various devices, and the silicon carbide is more energy-saving and simple than active heat dissipation components; especially for virtual / augmented reality devices, if the silicon carbide is used as a lens, the silicon carbide can be well thermally conducted and radiated, and the unique high refractive index of the silicon carbide can further increase the field angle of view of the device and improve the optical performance.

In one aspect, a heat transfer apparatus is provided, comprising a process fluid heat exchange loop having a mechanical cooler with a hot-side heat exchanger and a cold-side heat exchanger; and a mixing cooler for receiving process fluid from the hot-side heat exchanger and supplying cooled process fluid to the cold-side heat exchanger. The mixing cooler includes a direct heat exchanger and an indirect heat exchanger. The mixing cooler has a dry mode and a mixing mode. The heat transfer apparatus includes a controller configured to operate the process fluid heat exchange loop in one of a plurality of modes, at least in part, based on a determination of the heat load of the heat transfer apparatus.

The application belongs to the technical field of intelligent control of airplane ground air conditioners, and relates to a kind of airplane ground air conditioner equipment control method and system, the method is by setting up the operation unit including neural network unit and PID unit, combine multiple temperature sensors to detect the temperature of inlet air and outlet air in real time, use neural network to predict initial operating parameters, and realize fast response.In the cooling and heating mode, according to the deviation of the supply air temperature and the set temperature, the compressor frequency, the expansion valve opening degree and the electric heating power are dynamically adjusted, and the PID algorithm is used for fine tuning control, which improves the accuracy and energy efficiency of temperature control, solves the problem of inaccurate initial operating parameter judgment, slow heating and high energy consumption in the prior art, and is suitable for vehicle-mounted, fixed and modular airplane ground air conditioner equipment, with the advantages of fast heating and cooling, low energy consumption, precise control and the like.

A temperature controlled automated storage and retrieval system, comprising: • A) a storage area (60) for the storage of a plurality of storage containers (10) and one or more robotic load handling devices (30) for moving one or more of the plurality of storage containers in the temperature controlled automated storage and retrieval system; • B) a cooling system (62) comprising at least one cooling unit (76) and a closed network of tubing (70) in fluid communication with the at least one cooling unit (76) to circulate a heat transfer fluid from the at least one cooling unit (76) to the closed network of tubing via a common feed inlet (84) and back to the at least one cooling unit via a common return inlet (86), at least a portion of the closed network of tubing extends in the storage area for circulating the heat transfer fluid to exchange heat with the storage area; wherein the cooling system (62) further comprises a defrost system (100, 102, 110) and a controller operatively coupled to the defrost system (100, 102, 110) to control the temperature of the at least portion of the closed network of tubing in response to the thickness of ice on the at least portion of the network of tubing being equal to or above a predetermined thickness.

The application provides a moisture intelligent compensation method, system and device for reducing loss of food vacuum cooling, and relates to the technical field of intelligent food processing. The method of the application is applied to a vacuum cooling system (an internal vacuum chamber for placing food to be cooled is arranged). The method of the application comprises the following steps: obtaining a temperature field, a three-dimensional profile, a mass, humidity in the vacuum chamber and pressure in the vacuum chamber of the food; inputting the temperature field, the three-dimensional profile, the mass, the humidity and the pressure into a pre-trained water content prediction model to obtain water contents of multiple different regions of the food; determining target regions to be watered and water supplement amounts corresponding to each target region according to the water contents of each region and target water contents corresponding to each region; and watering the target regions according to coordinates corresponding to each target region and the water supplement amounts corresponding to each target region. The application can realize accurate and quantitative compensation of moisture in local regions of food and reduce loss in the vacuum cooling process of food.

The present application relates to a kind of organic working medium injection compression combined heat pump heating system and control method, system includes condenser, first economizer, evaporator, compressor, second economizer, ejector, working medium pump and generator, condenser is connected with the secondary high pressure fluid inlet of first economizer and ejector outlet, condenser is connected with heating terminal equipment and constitutes heating circuit, evaporator is connected with the low pressure fluid inlet of first economizer and secondary high pressure fluid outlet, evaporator is connected with low temperature heat source and constitutes heat recovery circuit, compressor is connected with the medium pressure fluid inlet of second economizer and the low pressure fluid outlet of first economizer, the medium pressure fluid outlet of second economizer is connected with the injection fluid inlet of ejector, working medium pump is connected with the high pressure fluid inlet of second economizer and condenser outlet, generator is connected with the working fluid inlet of ejector and the high pressure fluid outlet of second economizer, it has the advantages of simple structure, safe and reliable;Method has the advantages of simple process, easy to control.

The application sets a temperature measurement channel and a feedback control loop based on echo wall mode resonance drift by introducing refrigeration pumping light and different wavelength detection light in the same rare earth doped crystal disc-shaped echo wall mode resonant cavity, so that the resonant cavity realizes bulk optical refrigeration, and achieves the effects of non-contact, high-sensitivity temperature measurement and stable closed-loop control. Compared with the prior art, the method has the advantages of compact structure, small measurement disturbance, more direct temperature characterization and convenient long-term stable operation.

This disclosure relates to the field of cooling machine technology. One embodiment of this disclosure provides a vacuum rapid cooling machine for cooked food, which includes a casing and a vacuum chamber inside the casing. The machine is characterized by further including: a lid, a rotating ring, a rotating mechanism, and a tilting mechanism. The lid is mounted on the top of the casing via a moving mechanism, which drives the lid to move and controls its opening and closing. The rotating ring is rotatably connected inside the casing, and the vacuum chamber is rotatably connected inside the rotating ring. The rotating mechanism is mounted on the rotating ring and drives the vacuum chamber to rotate within the rotating ring. The tilting mechanism is mounted inside the casing and drives the vacuum chamber to flip and discharge the food. This technical solution addresses the problem in the prior art where a large amount of cooked food accumulates together, causing the food at the bottom to cool less evenly than the food on the outside, thus reducing the cooling efficiency of the cooked food.

The application relates to the technical field of waste heat refrigeration, and particularly discloses a production process for improving ammonia net value in a synthetic ammonia process by using waste heat refrigeration, which comprises the following steps: cooling ammonia synthesis gas after cooling is sequentially subjected to staged deep cooling through a first ammonia cooler and a second ammonia cooler, the ammonia synthesis gas is first cooled to 12-10 DEG C through the first ammonia cooler, then is deeply cooled to-10 DEG C to-25 DEG C through the second ammonia cooler, gaseous ammonia is liquefied, and ammonia synthesis material in a gas-liquid mixture is obtained; the ammonia synthesis material is sent into an ammonia separator to complete gas-liquid separation, liquid ammonia obtained through separation flows to a next section, and low-temperature circulating gas obtained through separation is recycled and reused. The application has the effect of improving ammonia net value in a synthetic ammonia process.

The present application belongs to the technical field of functional textiles, and discloses a core-shell structure fiber textile with optical performance and mechanical robustness and a preparation method thereof. The textile is a film composed of composite fibers, with a thickness of 50-250 microns and no inorganic fillers; the composite fibers are prepared by coaxial electrospinning and have a core-shell structure, wherein the core layer contains a flexible polymer and the shell layer contains a rigid polymer; an interface cross-linking is formed between the core layer and the shell layer through hydrogen bonds. The present application realizes the synergistic enhancement of ultrahigh solar reflectance and excellent mechanical robustness of electrospun non-woven fabrics in the field of radiative cooling, and the optical and mechanical properties remain stable even after severe washing and exposure to harsh conditions. The prepared textile not only has excellent cooling performance, but also has the advantages of extremely thin thickness, high elasticity, high strength, excellent fatigue resistance, self-repairing ability, environmental stability, and good air and moisture permeability and liquid repellency, with excellent comprehensive performance.

The application discloses a compressed air energy storage power generation system with high response speed and an operation method thereof. The outlet of a heat accumulator is connected with the inlet of a double-tank liquid piston, the outlet of the double-tank liquid piston is connected with a gas storage tank, and the outlet of the gas storage tank is connected with the inlet of an expansion generator set and the inlet of the double-tank liquid piston. A heat exchanger is arranged in the expansion generator set, the outlet of high-temperature concentrated ammonia water solution of a mixer in an ammonia compression-absorption composite heat pump unit is connected with the hot side inlet of the heat exchanger, and the hot side inlet of a solution heat exchanger in the ammonia compression-absorption composite heat pump unit is connected with the hot side outlet of the heat exchanger. The compressed ammonia steam outlet of the ammonia compression-absorption composite heat pump unit is connected with the cold side inlet of the heat accumulator, and the outlet of preheated dilute ammonia water solution of the ammonia compression-absorption composite heat pump unit and the cold side outlet of the heat accumulator are connected with the hot side inlet of the heat exchanger through the mixer. The system response speed is improved by using the fast response speed of the liquid piston to compensate for the slow start speed of the expander.

This invention relates to the field of water-saving irrigation and environmental control technology in facility agriculture, and discloses a PDH / T-RC radiative cooling composite membrane and a greenhouse water circulation system incorporating it. The composite membrane has a five-layer gradient structure, consisting of a weather-resistant protective layer, a near-infrared high-reflectivity layer, a high-radiation emission layer, a PDH hydrogel composite adhesive layer, and a hydrophilic condensation functional layer from top to bottom. This enables passive day and night cooling, high transmittance of photosynthetically active radiation, and efficient water vapor condensation. The water circulation system uses this composite membrane as the covering material, and is equipped with a condensate drainage structure, a water storage unit, and a drip irrigation unit to form a fully closed-loop passive water circulation system. This invention can reduce the greenhouse temperature by 3-10℃, increase irrigation water recovery rate by more than 50%, reduce water consumption by 30%-60%, stabilize greenhouse humidity, reduce the incidence of pests and diseases, increase crop yield by 10%-30%, operate with zero energy consumption throughout, and is suitable for the construction and renovation of various greenhouses.

The present application relates to a kind of integrated heat pump's combined heat and power system's operating method, combined heat and power system includes steam turbine system and heat network water heating system;Steam turbine system includes medium-pressure cylinder, low-pressure cylinder, generator and condenser;Heat network water heating system includes electric heat pump's no.1 condenser, absorber, absorption heat pump's no.2 condenser and peak heater.Heat network backwater is cooled after passing through no.2 evaporator, then in turn through electric heat pump, absorption heat pump and peak heater for cascade heating.In addition, by adjusting the opening of no.4 shunt valve, the participation degree of absorption heat pump can be controlled: when the outlet heat network water of no.1 condenser all directly flows to mixing valve, absorption heat pump does not run;When part or all heat network water enters absorber, absorption heat pump is put into operation.The present application can expand the operation adjustment range of unit, improve the energy utilization efficiency and heating flexibility of combined heat and power system under variable working condition.

This invention relates to the field of buffer water tank technology for central air conditioning radiant cooling in water systems, specifically a dual-temperature integrated water tank, comprising: a water storage tank, a fan coil supply pipe, a floor heating return pipe, a floor heating supply pipe, a mixing pipe, a water pump, a variable flow two-way valve, a first valve, a second valve, a temperature sensor, and a mixing controller. This invention integrates the buffer water tank and the mixing pump station into one unit, and uses a variable flow two-way valve instead of a traditional three-way valve for mixing and temperature regulation. In cooling mode, a portion of the 7-12℃ low-temperature chilled water output by the main unit is directly supplied to the fan coil units and dehumidifying fresh air units, while the other portion is mixed with the floor heating return water through the variable flow two-way valve to form 16-25℃ high-temperature chilled water supplied to the floor heating system or capillary network, achieving simultaneous output of two different water temperatures. Therefore, it has advantages such as high integration, convenient installation, valve resistance to jamming, and the ability of a single unit to meet the radiant cooling needs of large-area buildings.

The present invention relates to the technical field of heat pump air conditioners. Disclosed is a fluorine system heat pump air conditioner radiation pipe temperature refrigerant control system, comprising: an outdoor unit portion, an indoor unit portion, a ground radiation unit (9), a wall radiation unit (10), and a shed radiation unit (11); refrigerant inflow pipes of the ground radiation unit (9), the wall radiation unit (10), and the shed radiation unit (11) are in communication with a refrigerant supply pipe of an indoor heat exchanger (3) of the indoor unit portion, while refrigerant outflow pipes thereof are in communication with a refrigerant discharge pipe of the indoor heat exchanger (3) of the indoor unit portion, a valve body (8) being provided on the refrigerant inflow pipes and / or the refrigerant outflow pipes.

The application discloses a cross-scale asymmetric directional spectrum selective heat radiator design method, and relates to the technical field of heat transfer and exchange.The application comprises the following steps: step one, determining target radiator performance indexes according to application requirements; step two, selecting a spectrum controllable part meeting the principle of nanophotonics; step three, designing an asymmetric angle controllable part meeting the principle of ray optics; and step four, performing cross-scale optical coupling modeling, simulation verification and optimization.The heat radiator designed by the application can realize efficient, polarization-independent, spectrum and angle selective regulation of the asymmetric directional heat radiator, and significantly improves the performance indexes of the heat radiator.

The application belongs to the technical field of refrigerators, and provides a refrigerator and a control method thereof. In the refrigerator, a wind channel cover plate is used to control the on-off of a wind channel and a first chamber; a first fan is used to deliver cold energy generated by an evaporator to the first chamber and a second chamber through the wind channel; a second fan is arranged in the first chamber and is used to enhance air disturbance in the first chamber; a semiconductor refrigeration module is arranged between the first chamber and the second chamber; a backflow channel that is in communication with a space where the evaporator is located is arranged in the second chamber; a controller is connected with the wind channel cover plate, the first fan, the second fan, the semiconductor refrigeration module and a compressor, and is configured to: in response to a deep cooling mode switching instruction, control the first chamber to operate in a deep cooling mode; according to an accumulated running time length of the compressor and a real-time temperature of the first chamber, control the compressor, the semiconductor refrigeration module and the first fan to operate at a target gear, so that the real-time temperature of the first chamber is maintained in a preset deep cooling interval.

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 application discloses a self-adaptive radiative cooling coating and a preparation method thereof, and aims to solve the problem that the coating cannot keep warm in low-temperature environment after being formed and is not moisture-resistant. In the water-based polyurethane, titanium dioxide, boron nitride and temperature-sensitive color-changing particles are introduced, and then a PDMS / silicon dioxide layer is coated on the surface. The temperature-sensitive material becomes dark to realize efficient sunlight absorption. The absorbed heat can be quickly conducted to the bottom cavity through the heat conduction network formed by the boron nitride, so that the heat accumulation and dissipation are avoided. The application widens the application range of the water-based polyurethane coating, solves the problem of poor moisture resistance of the water-based polyurethane coating, and endows the water-based polyurethane coating with the self-adaptive radiative cooling performance.