345results about "Refrigeration machines" patented technology

The invention relates to a high-reflectivity high-entropy rare earth phosphate radiation refrigeration pigment, the high-entropy rare earth phosphate radiation refrigeration pigment has a monazite phase with a monoclinic system structure, the chemical formula of the pigment is (A1xA2yA3zA4uA5v) PO4, A1, A2, A3, A4 and A5 are any five rare earth cations of La, Ce, Yb, Gd, Nd and Eu, the cations are in an equimolar ratio, and x, y, z, u and v meet the condition that x + y + z + u + v = 2. Meanwhile, the invention also discloses a preparation method of the high-entropy rare earth phosphate radiation refrigeration pigment. The high-entropy rare earth phosphate radiation refrigeration pigment has high infrared emissivity in air, the emissivity reaches 0.90 or above within the wave band of 8-13 microns, the solar reflectivity reaches 0.93 or above within the wave band of 0.3-2.5 microns, and the high-entropy rare earth phosphate radiation refrigeration pigment has wide application prospects in the fields of building energy conservation, urban heat island effect reduction, photovoltaic power generation efficiency improvement and the like.

Technology is disclosed for constructing a photonic cooling device for a heat source. In one aspect, a computing unit (i) based on at least one design parameter for an extractor layer of the photonic cooling device, inversely designs a coupler layer in accordance with one or more coupler objectives to define a structure of the coupler layer, (ii) generates a coupler-layer design plan indicative of the structure of the coupler layer that facilitates its fabrication, (iii) based on the at least one extractor-layer design parameter, inversely designs a back-reflector layer in accordance with one or more back-reflector objectives to define a structure of the back-reflector layer, (iv) generating a back-reflector-layer design plan indicative of the structure of the back-reflector layer that facilitates its fabrication, and (v) causing at least one of the coupler layer or the back-reflector layer to be fabricated in accordance with the corresponding generated design plan.

The utility model relates to a periodic energy storage heat pump for solar coupling freezing point heat removal, which belongs to the technical field of heat pumps and is characterized in that a first heat exchange part and a second heat exchange part are arranged in a solid-liquid phase change energy storage tank, and heat exchange is performed between the first heat exchange part and the second heat exchange part through a medium in the solid-liquid phase change energy storage tank; the two ends of the first heat exchange part communicate with a medium inlet and a medium outlet of the PVT photovoltaic panel correspondingly, and a liquid drainage pipeline and a liquid return pipeline are arranged on the second heat exchange part. Solar energy collects heat into the solid-liquid phase change energy storage tank through the PVT photovoltaic panel in the daytime and serves as a heat source, the PVT photovoltaic panel system stops working at night, the heat pump continues to extract residual heat in the water tank until the heat in the water tank is completely extracted and the phase change water tank is changed into solid ice, heat extraction at the freezing point is achieved, latent heat in the solid phase and the liquid phase is fully utilized, and energy is saved. Heat storage of solar energy is achieved, the part with insufficient heat at night is supplied by the boiler, and the utilization efficiency of the solar energy is improved by 12.2%.

The invention relates to the technical field of desert road cooling, discloses a desert road self-temperature-sensing type spraying cooling system based on radiation refrigeration water supply, and aims to solve the problems that a traditional cooling technology depends on an external water source, water resources are wasted, and accuracy is insufficient. The system comprises a water supply module, a temperature detection module, a data processing module and a spray cooling module, wherein the water supply module is combined with day and night temperature difference condensation through a radiation refrigeration assembly at the top of a guardrail stand column and is led to a water storage assembly for water storage through a road shoulder water guide assembly; the temperature detection module collects pavement temperature through sensors on two sides of a road; the data collector receives temperature data and transmits the temperature data to the temperature judgment system, and the water storage assembly and the spraying assemblies on the two sides of the road are started after high temperature is judged; the spraying assembly sprays water for cooling in a targeted mode. According to the scheme, autonomous supply of water resources and accurate cooling are achieved, the operation safety of the desert road is improved, and resources and cost are saved.

The invention discloses a construction method of a radiation refrigeration film on an outer layer of a concrete retaining structure, which is characterized by comprising the following steps: S1, polishing and filling: polishing a tip bulge on the concrete retaining structure by using an angle grinder, and pouring and leveling by using a silicone adhesive; s2, surface hardening treatment: spraying or roll-coating a surface hardening agent; s3, cleaning: cleaning the surface of the concrete by using a high-pressure water gun after airing; s4, treating the surface by using an interface treating agent: roll-coating the interface treating agent; s5, film pasting is conducted, specifically, a radiation refrigeration film is laid, one side of the radiation refrigeration film is sequentially provided with a pasting adhesive layer and a release protection film from inside to outside, after the release protection film is stripped, the radiation refrigeration film is pasted to the concrete treated in the step S4 through the pasting adhesive layer, the radiation refrigeration film is more smoothly pasted and better bonded, and the radiation refrigeration film is more uniform in thickness and better in adhesion performance. And the coating is not easy to fall off during long-term use.

The utility model relates to the technical field of air conditioners, in particular to a water-cooling cold water and liquid-cooling air conditioning device. Comprising an EC fan, a water coil pipe, two liquid cooling distribution units, a first circulating water pump, a second circulating water pump, a first plate heat exchanger, a second plate heat exchanger, two compressors and an outdoor unit assembly, the input end of the first circulating water pump is connected with the water coil pipe, and the output end of the first circulating water pump is connected with the first plate heat exchanger; each compressor is connected with the first plate heat exchanger and the second plate heat exchanger, the outdoor unit assembly is connected with the first plate heat exchanger and the second plate heat exchanger, and each liquid cooling distribution unit is connected with the outdoor unit assembly, the first plate heat exchanger and the second plate heat exchanger. The input end of the second circulating water pump is connected with the outdoor unit assembly, and the output end of the second circulating water pump is connected with the two liquid cooling distribution units, so that the reliability of operation of the air conditioner in the machine room can be improved, and the energy consumption of the air conditioner is greatly reduced.

The invention relates to the technical field of extremely low temperature refrigeration, and provides a multi-stage parallel flow channel heat exchanger which comprises an outer barrel and an inner barrel which are connected in a sleeving mode and share the same center shaft. A containing cavity is formed between the outer barrel and the inner barrel, and the two ends of the containing cavity are each provided with an end cover; two spiral guide plates which are arranged around the central shaft and have the same rotating direction are also arranged in the accommodating cavity; a runner is formed between the two guide plates; n partition plates which are the same as the flow channels in spiral direction are arranged in each flow channel; and the flow channel is divided into N + 1 parallel sub-flow channels by the N partition plates. In this way, the two spiral flow channels are formed in the containing cavity, and the partition plates are arranged in each flow channel to form the multiple sub-flow channels. Parallel flow heat exchange, multi-stage heat exchange or multi-heat-exchange-surface cross heat exchange of multiple media can be achieved. The heat exchange efficiency and the heat exchange effect are improved, and the method can be applied to various scenes. The invention further provides a dilution refrigerator.

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 invention provides an efficient air conditioner refrigeration cycle device with a radiation subcooler, and belongs to the technical field of air conditioner refrigeration. A radiation subcooler is connected to a working medium flowing pipeline between the outlet end of a condenser and the inlet end of an expansion valve in series and used for conducting radiation heat exchange cooling on a high-temperature and high-pressure liquid working medium discharged from the condenser; the radiation subcooler comprises a subcooler shell, wherein the outer surface of the subcooler shell is coated with a high-radiation coating; the working medium heat exchange tube is arranged in the subcooler shell and is distributed in a spiral or snake shape; and the spoiler is of a spiral blade structure, is arranged on the outer wall of the working medium heat exchange tube in a sleeving manner and is tightly attached to the working medium heat exchange tube. The high-temperature and high-pressure liquid working medium flowing out of the condenser is further cooled through radiation heat exchange, so that the supercooling degree of the working medium is remarkably improved, the refrigeration cycle efficiency is improved, and the energy consumption of the air conditioner is effectively reduced.

This invention discloses a direct air-to-water system using heat flow effect coupled with sky radiation cooling, comprising: a heat flow-type water intake device, which includes at least one heat flow-type water intake unit, the heat flow-type water intake unit including a shell, a hot cavity, a cold cavity, and a microchannel assembly; the cold cavity is provided with a cold cavity heat exchanger and a cold cavity drain outlet; an air inlet pipe connected to the cold cavity air inlet; a cold cavity water collection pipe; a sky radiation cooling water collection device, which is provided with a humid air flow channel; the hot cavity exhaust outlet is connected to the inlet at one end of the humid air flow channel; the other end of the humid air flow channel is provided with a condensate outlet and a dry cold air outlet; a dry cold air pipe for introducing dry cold air into the cold cavity heat exchanger; a cooling water collection pipe; and a water collection tank, the cold cavity water collection pipe connecting the cold cavity drain outlet to the water collection tank, and the cooling water collection pipe connecting the condensate outlet to the water collection tank. The water intake system using this invention is unaffected by air humidity and can utilize renewable energy to obtain fresh water from the air.

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 present prevention provides a surface coating for cooling a surface by light scattering comprising a plurality of successive layers, each of the layers may be comprised of a plurality of spheres arranged to form a structure comprised of packed spheres. Each layer may have a different arrangement of packed spheres to create to a different light scattering property in each of the layers. The coating of the structures may also be formed by randomly packed spheres and the spheres may have a uniform diameter.

The application discloses an aluminum phosphate powder material with radiation refrigeration performance and a preparation method thereof. The method comprises the following steps: step 1, according to the molar ratio of aluminum ions, phosphate ions and ethylene glycol 2:(1-4):(10-20), aluminum hydroxide, ammonium phosphate and ethylene glycol are weighed, the aluminum hydroxide and the ammonium phosphate are mixed and then put into a mortar, the ethylene glycol is added into the mortar, and after being fully ground, the mixture A is obtained through filtration and washing; step 2, the mixture A is put into a crucible and placed in a muffle furnace, the temperature is first raised from room temperature to 200-280 DEG C at a temperature rising rate of 3-5 DEG C / min, and then raised to 1000-1200 DEG C at a temperature rising rate of 5-8 DEG C / min, and the temperature is kept for 2-4 h to obtain the product B; and step 3, the product B is ground in a mortar, sieved and the aluminum phosphate powder material is obtained. The aluminum phosphate powder material prepared by the method has excellent radiation refrigeration performance.

The invention discloses a laser-constructed aluminum-based dual-mode heat regulator and application thereof. The aluminum-based dual-mode heat regulator comprises an aluminum base; one side of the aluminum base is provided with a passive radiation cooling layer, and the other side is provided with a solar heating layer; the passive radiation cooling layer comprises a laser constructed aluminum oxide layer and a hydrophobic-emission enhancement layer above the aluminum oxide layer; and the solar heating layer comprises a black aluminum layer constructed by laser and a hydrophobic layer arranged above the black aluminum layer. According to the invention, Al2O3 and black Al nanoparticles are directly assembled on an Al sheet as a dual-mode functional layer through laser surface direct writing (LSDW), and then a hydrophobic material is sprayed as a self-cleaning layer. The inherent high thermal conductivity of the Al sheet is beneficial to efficient heat exchange between the functional surface and the target building, and effective temperature adjustment is achieved. The passive radiation cooling function and the solar heating function are integrated in one device, and cooling and heating can be easily achieved according to seasonal changes.

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.

A photonic cooling device for a heat source comprises a coupler and extractor layer. The coupler layer is configured to guide (i) first light into the extractor layer, (ii) second light into the extractor layer that is defined based on at least one heat-source characteristic to target a given region that corresponds to a hot spot region of the heat source, and (iii) third light away from the extractor layer, thereby cooling the heat source. The extractor layer comprises a fluorescent medium and is configured to (a) guide fourth light to the coupler layer responsive to the first light that is indicative of the at least one heat-source characteristic, (b) up-convert the second light via fluorescence at the given region of the extractor layer, and (c) based on the up-conversion, output the third light to the coupler layer, thereby extracting heat from the hot spot region of the heat source.

The invention provides a multiband intelligent radiation temperature control device, which realizes multiband intelligent radiation temperature control through innovative design, and is characterized in that a first micro-unit and a second micro-unit with different characteristic lengths are adopted in an optical functional layer, and according to an electromagnetic resonance theory, the first micro-unit with the long characteristic length is matched with a far infrared band wavelength, and the second micro-unit with the long characteristic length is matched with a far infrared band wavelength; the far infrared radiance can be modulated along with the change of the external temperature, and the second micro-unit with the short characteristic length is adaptive to a middle infrared band to realize corresponding radiance modulation; meanwhile, large-area temperature control uniformity is guaranteed through array arrangement of the modulation areas, and environment adaptability is enhanced through combination of the protection layer and the optical function layer. Compared with a traditional single-band temperature control device, the design breaks through band limitation, achieves mid-infrared and far-infrared dual-band cooperative regulation and control, can respond to environment temperature changes in real time, improves the temperature control precision and dynamic performance, and effectively solves the problems that in the prior art, temperature control is not accurate in a complex environment, and the application scene is single.

The invention constitutes a radiator for the dissipation of heat from a spacecraft in outer space that comprises radiator panel B made of a sheet of composite material that has an arc- or C channel-shaped cross-section and consists of structural layer 1 made of a flat spring, thermally conductive layer 2 made of a material characterised by a high conductivity coefficient, top layer 3 made of a material characterised by a high emissivity coefficient with infrared radiation and a low absorption coefficient in visible light frequencies, and binder layers, connected via the arched or C channel-shaped edge with spacecraft body A including, in the case of thermally conductive layer 2, thermally bonded with heat source 6.3.

The present invention relates to a passive cooling system comprising a radiative heat exchanger and a convective heat exchanger comprising a heat transfer fluid. The radiative heat exchanger comprises a glass substrate having at least a silver reflective layer comprising at least ≥700mg / m2 of silver.

A system and method for controlling the temperature of a medium by refrigerant vaporization, working gas condensation, or a combination of both, the system including a container, at least one working gas storage tank having at least one storage tank section including a wall thermally coupled to a volume of medium within the container and having an exterior surface constructed to provide a volume of medium thermal coverage within the container, and a condenser for regulating working gas condensation in the storage tank, whereby the working gas storage tank forms a vapor space in each of the at least one storage tank section in response to receiving working gas and regulating condensation in the condenser to enable working gas condensation at or near a selected temperature of a volume of medium within the container thermally coupled to the respective storage tank section.

An apparatus for capturing a water content from a water containing gas, the apparatus comprising: a housing having an inlet into which the water containing gas can flow; a water adsorbent located in the housing, the water adsorbent comprising at least one water adsorbent metal organic framework composite capable of adsorbing a water content from the water containing gas; and a water desorption arrangement in contact with and / or surrounding the water adsorbent, the water desorption arrangement being selectively operable between (i) a deactivated state, and (ii) an activated state in which the arrangement is configured to apply heat, a reduced pressure or a combination thereof to the water adsorbent to desorb a water content from the water adsorbent.

To miniaturize a hybrid air conditioning system.SOLUTION: A hybrid air-conditioning system includes an engine 20, a motor generator 21, compressors 22a, 22b for circulating a refrigerant in a refrigerant circuit, an MG side power transmission mechanism 61 configured to transmit a driving force between the engine 20 and the motor generator 21, and a CP side power transmission mechanism 62 configured to transmit the driving force from the engine to the compressors 22a, 22b. The motor generator and the MG side power transmission mechanism are arranged on one side in a direction parallel to a power shaft 201 of the engine, and the compressors 22a, 22b and the CP side power transmission mechanism are arranged on one side opposite to the one side of the engine.SELECTED DRAWING: Figure 2

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.

The invention belongs to the technical field of building energy supply, and discloses a combined type multi-energy energy supply system which is characterized in that a ground source heat pump unit with higher energy efficiency is preferentially started to bear basic cooling and heating loads through multi-energy optimization scheduling and gradient utilization; when the heating load in winter exceeds the maximum heating capacity of the ground source heat pump unit, the air source heat pump is started, and when the cooling load in summer exceeds the maximum cooling capacity of the ground source heat pump unit, the centrifugal water chilling unit is firstly started and then the air source heat pump is started, so that the annual comprehensive operation energy efficiency of the system is remarkably improved; a cooling tower auxiliary heat dissipation loop is arranged for a ground source heat pump, a control unit monitors the accumulated heat taking and releasing difference value of an outdoor buried pipe, and when the accumulated heat taking and releasing difference value exceeds a preset threshold value, the cooling tower is switched to discharge heat, the soil heat unbalance problem is fundamentally solved, and long-term stable operation of the system is ensured; the energy supply reliability can be improved, the building energy-saving requirement is met, and the high application and popularization value is achieved.

The invention discloses a cooling tower water saving technology based on sky radiation, and belongs to the technical field of building energy saving and water resource recovery. The system comprises an indirect evaporative cooler and an air water taking device with a sky radiation plate. The core innovation of the invention lies in that an air water taking device is additionally arranged at an evaporative cooling exhaust position, and the device utilizes a sky radiation plate to condense and take water from high-humidity air discharged by an evaporative cooler, and even can directly condense and take water from ambient air by utilizing a sky radiation cooling effect under the condition of an excellent'atmospheric window '. Collected water converges into the system water tank, cyclic utilization of water resources of the evaporative cooling system is achieved, and sustainability and comprehensive water utilization benefits of the evaporative cooling system can be remarkably improved (especially in a dry and hot climate zone).

The invention discloses a current sampling device of a dual-motor driving system and a refrigerating system, the dual-motor driving system at least comprises a five-bridge-arm circuit connected with a bus capacitor, and the five-bridge-arm circuit is used for driving a first motor and a second motor which are connected with the five-bridge-arm circuit. The current sampling device comprises a current sensor arranged on a direct current bus between the five-bridge-arm circuit and the bus capacitor, and the current sensor acquires current parameters of the first motor and the second motor by acquiring current parameters of the five-bridge-arm circuit in different switching states. Compared with the prior art, the single current sensor is adopted and arranged on the direct-current bus, and is matched with different switching states of the five-bridge-arm circuit, so that the current of a plurality of bridge arms or phase lines can be monitored through one current sensor, and the hardware cost is greatly reduced.

Provided in the present application is a radiative cooling film, comprising a base film layer, wherein the base film layer comprises a resin matrix, and a plurality of isolated cells, a plurality of separate first particles and a plurality of cell-enveloped second particles, which are all dispersed in the resin matrix. In the radiative cooling film using the technical solution of the present application, air in the cells in the base film layer is a substance with a low refractive index, the first particles and the second particles are each a substance with a high refractive index, and there are differences between the refractive index of the air in the cells and the refractive indices of the first particles and the second particles, thereby improving the reflectivity of the base film layer; by controlling the differences between the refractive index of the air in the cells and the refractive indices of the first particles and the second particles, high reflectivity is achieved; moreover, since the radiative cooling film of the present application does not contain a metal coating, signal shielding can be avoided, which is beneficial to the wide application of the radiative cooling film.