55 results about "Heat leakage" patented technology

The application relates to the technical field of spacecraft thermal control, and particularly provides a spacecraft multilayer heat insulation assembly thermal bridge suppression type bolt fixing structure which comprises a fixing assembly, a heat insulation bushing, a first heat insulation gasket, a second heat insulation gasket, a multilayer heat insulation assembly and a structural member; a stud passes through the second heat insulation gasket, the structural member and the multilayer heat insulation assembly in sequence; the outer surface of the stud is covered with the heat insulation bushing; the heat insulation bushing is a gradient functional composite structure; the heat insulation bushing comprises, from inside to outside, a heat insulation damping layer, a heat reflection layer and a structural enhancement radiation resistance layer; the contact surface between the second heat insulation gasket and the structural member is provided with a micro-cone array structure; the contact surface between the first heat insulation gasket and the top of the heat insulation bushing is provided with a micro-cone array structure; and the micro-cone array structure is used for filling assembly gaps and reducing solid heat conduction. The application has the advantages of low heat leakage, strong space adaptability and high thermal resistance stability.

The application discloses a high-temperature superconducting conductor and a preparation method thereof, and relates to the technical field of high-temperature superconductivity, wherein the conductor comprises an inner pipe body and an outer pipe body arranged coaxially, a liquid nitrogen convection cooling zone is formed in the inner pipe body, and a vacuum heat insulation cavity is formed between the inner pipe body and the outer pipe body. By forming the liquid nitrogen convection cooling zone in the inner pipe body and the vacuum heat insulation cavity between the inner pipe body and the outer pipe body, the liquid nitrogen can directly soak the superconducting cable for efficient heat exchange, the vacuum heat insulation cavity effectively blocks the radial conduction of environmental heat to the inner pipe body, and the heat load of the refrigeration system is greatly reduced; by electrically connecting the low-temperature end electrode and the superconducting cable and connecting the room-temperature end electrode and the low-temperature end electrode in series to form a loop, the room-temperature end electrode is avoided from directly contacting the superconducting cable, the axial heat leakage along the electrode is reduced, and one end of the liquid nitrogen cooling pipe is communicated with the inner pipe body and the other end of the liquid nitrogen cooling pipe extends to the outside through the outer pipe body, so that the stable supply and the sealing reliability of the liquid nitrogen are ensured.

This application discloses a rotor comprising a rotor housing, a rotor shaft, a rotor core, and rotor windings. The rotor forms three coaxially distributed zones: a normal temperature zone, a first low-temperature zone, and a second low-temperature zone. The first low-temperature zone is located between the normal temperature zone and the second low-temperature zone. The temperature of the first low-temperature zone is lower than that of the normal temperature zone, and the temperature of the second low-temperature zone is lower than that of the first low-temperature zone. The rotor shaft is located in the normal temperature zone, while the rotor core and rotor windings are located in the second low-temperature zone. The rotor windings include coil leads, each coil lead comprising a conductor and a Peltier unit. At least a portion of the Peltier unit is in close contact with the conductor. One end of the conductor is connected to the second low-temperature zone, and the other end of the conductor passes through the rotor housing to the outside of the rotor. This application also provides a superconducting motor. This application reduces heat leakage by employing a normal temperature shaft and a three-temperature zone structure within the rotor, while also incorporating Peltier units on the coil leads of the rotor windings.

This utility model discloses a heat pipe waste heat recovery finned heat exchanger structure, including a lower shell, a sealing plate at the upper end of the lower shell, an upper shell on the sealing plate, a first mounting cavity in the upper shell, and a second mounting cavity in the lower shell. Heat exchange components are installed in both the first and second mounting cavities. This utility model achieves efficient heat exchange between high-temperature flue gas and low-temperature air by placing the evaporation and condensation sections of the heat pipe separately within the upper and lower shells, combined with a finned assembly and a baffle structure. The inclined installation of the heat pipe and the non-vertical angled baffle design significantly improve heat exchange efficiency and airflow uniformity. The flange and sealing plate structure ensure system sealing and prevent heat leakage. The overall structure is compact, easy to maintain, and suitable for industrial waste heat recovery scenarios.

This invention discloses a universal cryogenic valve heat leakage performance testing device and method, belonging to the field of valve testing technology. It includes: a cryogenic valve to be tested installed on the upper end of a cryogenic thermostat; the valve seat of the cryogenic valve to be tested connected to a valve heat exchanger via a pipe clamp; a first cold shield surrounding the valve seat; a valve support including a first flange adapted to different cryogenic valves to be tested; two cold shields installed inside the cryogenic thermostat, both with modular sidewall designs, flexibly adaptable to different cryogenic valves to be tested; two heaters connected to a temperature controller respectively installed on the heat sink and the pipe clamp; a GM refrigeration unit installed inside the cryogenic thermostat, including two-stage cold heads; a second cold shield surrounding the two-stage cold heads; a secondary cold head with a secondary heat exchanger connected to the valve heat exchanger; a helium supply device connected to the primary heat exchanger on the primary cold head; a helium recovery device connected to the valve heat exchanger; and a vacuum pump unit connected to the cryogenic thermostat. This invention improves testing efficiency and device utilization.

The utility model provides a kind of excavator bucket welding post heat treatment equipment, belong to bucket processing technical field, including heat treatment assembly, including base, the support of fixed connection in base lateral wall, the box of fixed connection in support lateral wall, heat treatment host computer encapsulated in box interior;Feeding assembly includes the track of fixed connection in base lateral wall, the track car of adaptive installation in track lateral wall, the backing plate of insertion in track car upper end, and the sealing plate installed in backing plate upper end.The utility model has the beneficial effects that: the cooperation of heat treatment assembly and feeding assembly, the lifting adjustment of sealing plate and backing plate cooperation, effectively reduce heat leakage, orientation system ensures bucket positioning accuracy, improves heat treatment quality stability.Separated structure is convenient for the transportation, installation and maintenance of equipment, can be flexibly adjusted layout according to production demand, can realize the linkage operation of multiple equipment, adapt to the heat treatment demand of different specifications bucket, improve the degree of flexibility of production line.

The application relates to the technical field of material in-situ micro-nano experiment platforms, and provides a transmission electron microscope in-situ low-temperature sample rod, which comprises a main body part, a handle and a rod body, the rear end of the rod body is connected with the handle, a cold-lead channel extending from the handle to the front end of the rod body is arranged in the main body part, a cold-lead part is suspended and supported in the cold-lead channel through a heat-insulating support structure and extends out of the front end of the rod body at the front end, is used for being in contact with a rod head, a cold-quantity receiving part is connected with the cold-lead part at a first end and extends out of the main body part at a second end, a cold source module is configured to use closed solid nitrogen as a cold source to output vibration-free cold quantity, and the second end of the cold-quantity receiving part is in contact with the cold source in the cold source module. In this way, the transmission electron microscope in-situ low-temperature sample rod has the advantages of extremely low temperature, vibration-free, long-time heat preservation and low heat leakage, so as to meet the requirements of a transmission electron microscope in a lower temperature zone, high stability and long time.

This invention discloses an energy-saving single-crystal furnace thermal field system based on gradient control and its modification process, belonging to the field of photovoltaic and semiconductor material preparation technology. It includes a bottom insulation layer composed of integral or large-block cured felt spliced ​​together; a side insulation cylinder composed of integral or segmented cured felt, with the segments seamlessly spliced ​​using a labyrinth-style seal, and the gap between its outer wall and the inner wall of the furnace designed to maximize insulation thickness; and a top insulation cover plate composed of integral or large-block cured felt, with a reinforcing ring at the center observation hole. The cured felt is a rigid carbon fiber composite material treated with a densification process, with a lower thermal conductivity than soft felt of the same density. The bottom insulation layer can adopt a multi-layer density gradient composite structure, and a high-reflectivity graphite layer can be set on the inner wall of the side insulation cylinder. This invention eliminates the heat leakage caused by the gaps in the multi-layer splicing of traditional soft felt, achieving reduced heating power, extended thermal field life, long-term stable insulation performance, and reduced energy consumption and operating costs.

This application discloses an irrigation method, controller, and modular planting bin based on a modular planting bin. The method includes: acquiring the temperature and target gap heat leakage coefficient within a target area of ​​the irrigation zone; determining a target evaporation rate based on the temperature and target gap heat leakage coefficient; determining a target irrigation amount based on the target evaporation rate and an irrigation correction coefficient; and performing irrigation operations on the irrigation zone based on the target irrigation amount. This application addresses the regional thermal characteristic differences caused by thermal bridging at the joints of the modular planting bin by dividing the bin into zones and developing personalized irrigation plans for each zone, thus improving the level of intelligent irrigation. This application utilizes the target gap heat leakage coefficient to compensate for evaporation caused by thermal bridging at the joints, thereby obtaining an accurate target irrigation amount. This not only compensates for the inherent defects of the modular planting bin structure but also ensures crop growth, meeting the requirements of green agriculture.

This invention provides a cryogenic medium storage container, in which an inner liner is spaced within an outer shell, forming a double-layer insulation structure and a thermal insulation barrier. A corrugated pipe serves as a channel connecting the inner liner. Compared to straight metal pipes used in related technologies, corrugated pipes have a smaller cross-sectional area and a longer thermal bridge path after axial extension, offering advantages such as a smaller thermal conductivity cross-sectional area and a longer thermal conductivity path, thus reducing heat leakage. Simultaneously, a support assembly's support kit, located radially outside the corrugated pipe, reinforces it and ensures stable installation of the inner liner. This design allows the support assembly to maintain its structural strength while effectively and stably installing the inner liner within the outer shell, while simultaneously improving its insulation performance. This reduces heat leakage and enables longer storage times for the medium, meeting the optimal insulation requirements and extended storage time of liquid oxygen cylinders.

The application relates to the technical field of energy-saving control, and particularly discloses an energy-saving control method and system for an automobile baking paint lamp. The method comprises the following steps: applying a heating test to a controlled paint surface, extracting a transient heat diffusion feature to determine whether there is an implicit heat extraction effect; if there is, obtaining a critical input threshold and discretizing a continuous heating instruction into an intermittent pulse sequence; evaluating an extraction effect decay process in a pulse-off section and obtaining deep heat storage saturation; analyzing an energy coverage relationship of residual cross-linking heat demand of a paint film, triggering an early fusing instruction, and driving the paint surface into a passive heat gliding curing stage. The system comprises an extraction identification module, a critical analysis module, a retardation analysis module, a decay evaluation module and an instruction triggering module. The application converts invalid heat leakage absorbed by the substrate into a feedback heat source in the later period through pulse retardation heat leakage, which is beneficial to reducing long tail energy consumption in the curing tail period.

The utility model relates to medicinal material processing technical field, concretely relates to a medicinal material hot -blast circulation oven, and the main box door sets up the first electromagnetic board, closes and electrifies and adsorbs the drying warehouse opening can magnetically attract material and compresses the first sealing strip, one box door is provided with recessed groove and is embedded with toughened glass, and the recessed groove edge is with magnetically attractable material and second sealing strip, and independent observation door is equipped with second electromagnetic board, and after closing, electrification adsorbs the recessed groove and compresses the second sealing strip, this design realizes the perspective observation under the closed condition of main door, and prevents the instantaneous heat leakage of main door opening, and the double electromagnetic adsorption cooperation compression sealing effectively blocks the observation window heat conduction and the gap heat loss, overcomes the cold bridge effect and the sealing aging defect, when the equipment works, the fan suction drying warehouse top moisture pumps into the condensing box, and the semiconductor board refrigeration end cooperates with the fin condensation dehumidification, and after dehydration, air is heated by electric heater, forms the downward penetrating hot -blast circulation from the exhaust hole, reduces the heat loss significantly while guaranteeing the visibility, improves the drying stability and energy efficiency.

This invention discloses a heterogeneous particle partitioned relay asymmetric moving bed cold storage system and its operation method. The system includes a first moving bed heat exchanger, a cold particle storage tank, a second moving bed heat exchanger, a first / second hot particle storage tank, and a conveying device. The first moving bed heat exchanger, the cold particle storage tank, and the second moving bed heat exchanger are connected in series vertically, forming a gravity-driven trajectory path for the particles from top to bottom. The conveying device connects the second hot particle storage tank and the first hot particle storage tank, forming a mechanical return path for the particles from bottom to top. During operation, the particles in the cryogenic region rely solely on gravity to complete heat exchange, achieving dual decoupling of particle state transition and mechanical transport in both physical space and operating time. This architecture, while removing the mechanical drive components in the cryogenic region, utilizes the cold particle storage tank as an intermediate hub to achieve asynchronous scheduling and efficient management of charging and discharging cold conditions, significantly reducing cryogenic heat leakage losses and improving the system's engineering reliability and grid dispatch adaptability.

The application relates to a hot field assembly and a single crystal furnace device, the hot field assembly and the single crystal furnace device comprising a flow guide cylinder, a lower heat preservation cover, a lifting mechanism for driving the flow guide cylinder to pass through the inner ring of the lower heat preservation cover and being movable up and down relative to the lower heat preservation cover, the hot field assembly further comprising a heat preservation ring and a transmission mechanism; the heat preservation ring is located at the lower heat preservation cover, and the heat preservation ring comprises at least two heat preservation units for surrounding the flow guide cylinder, so that the heat preservation ring can be folded or unfolded; the transmission mechanism is connected with the lifting mechanism and the heat preservation units, and the folding or unfolding of the heat preservation ring is controlled based on the rising or falling of the output end of the lifting mechanism. When the flow guide cylinder moves to an upper limit position, a gap appears between the flow guide cylinder and the lower heat preservation cover, at this time, the heat preservation ring surrounds the flow guide cylinder and seals the gap between the flow guide cylinder and the lower heat preservation cover, heat leakage is reduced, the heat preservation effect is improved, and the heat preservation ring can also heat the flow guide cylinder, so that the heat preservation effect of the flow guide cylinder is improved.

The application discloses a rotor, which comprises a rotor shell, a rotor shaft, a rotor core, a rotor winding and a cold medium transmission mechanism; the cold medium transmission mechanism comprises a rotating transmission assembly, a stationary transmission assembly and a magnetic fluid sealing assembly; the rotating transmission assembly is installed to one end of the rotor shaft; the stationary transmission assembly is rotationally connected to the rotating transmission assembly; the stationary transmission assembly forms a stationary input channel and a stationary output channel located outside the stationary input channel; the rotating transmission assembly forms a rotating input channel and a rotating output channel located outside the rotating input channel; and the magnetic fluid sealing assembly is located outside the stationary output channel or outside the rotating output channel to seal the gap between the stationary output channel and the rotating output channel. The application also discloses a superconducting motor. In the application, the normal-temperature rotor shaft is adopted, a three-temperature-zone structure is arranged in the rotor, and a sealing structure between the stationary transmission assembly and the rotating transmission assembly is arranged, so that the heat leakage is reduced.

The application discloses a low-temperature liquid storage tank integrated with compensation and support structures, which comprises a shell assembly, a content container assembly and a base assembly; the shell assembly is arranged on the base assembly, the content container assembly is arranged in the shell assembly and is in sliding connection with the base assembly, the content container assembly is coaxially arranged with the shell assembly, a compensation structure is arranged between the content container assembly and the shell assembly, at least part of the end of the compensation structure is embedded in the content container assembly, and the compensation structure can drive the content container assembly to move relative to the shell assembly by a predetermined size; in the scheme, the compensation structure is integrated with the upper support structure, and the support can bear and limit; the compensator is connected with the content container and the shell, and can compensate for the displacement of the content container and the shell under low-temperature working conditions and manufacturing size deviation; the cross-sectional area of the compensator is small, and the expansion length is long, so that the heat leakage can be effectively reduced.

The application discloses a continuously-operated multistage extremely-low-temperature adiabatic demagnetization refrigeration system, which comprises multistage adiabatic demagnetization refrigerators, a cold quantity transmission structure, a temperature control unit, a buffer cavity, a staged heat connection structure and a heat sink. The multistage adiabatic demagnetization refrigerators are arranged between the heat sink and the temperature control unit, and the refrigeration paths of the multistage adiabatic demagnetization refrigerators are formed by the on-off of the heat switches to realize step-by-step temperature reduction. The cold quantity transmission structure transmits the cold quantity generated by the multistage adiabatic demagnetization refrigerators to the temperature control unit. The temperature control unit is encapsulated with a low-temperature working medium, and the low-temperature working medium is phase-changed in the temperature control unit to realize cold quantity buffering and continuous refrigeration output through the latent heat of phase change. The buffer cavity is communicated with the temperature control unit and is used for buffering the gas-phase pressure fluctuation of the low-temperature working medium. The staged heat connection structure is connected with the communicating pipe through a heat exchanger to form a heat exchange connection, so that the heat conduction and heat leakage of the communicating pipe from the high-temperature side to the temperature control unit are reduced. The application can obtain a lower refrigeration temperature through the multistage adiabatic demagnetization refrigerators, and can convert the intermittent cold quantity in the adiabatic demagnetization refrigeration process into a continuous and stable cold quantity output through the temperature control unit. The application has the advantages of low refrigeration temperature, continuous operation, good temperature control stability and small parasitic heat leakage.

This invention provides an infrared detection system and method for thermal leakage on complex metal surfaces, comprising: a high-temperature steam generating unit; and an infrared imaging unit including an infrared camera capable of capturing infrared image sequences of a test sample. The high-temperature steam generating unit sequentially injects high-temperature steam into the test sample to heat it, with different pressures in the sample during the two steam injections. During each steam injection, the infrared camera captures a sequence of infrared images of the test sample. The infrared detection system identifies leakage points in the test sample by performing differential analysis on the infrared image sequences from the two heating processes. This invention effectively eliminates interference from different emissivities on the surface of the test piece, achieving accurate and convenient detection of thermal leakage on complex metal surfaces.

The present invention provides a refrigeration device which is capable of switching between a single-stage operation and a dual-stage operation and which makes it possible to suppress heat leakage from a use-side apparatus to a refrigerant circuit-side via a heat exchanger that is in a state of not functioning as a heat exchanger due to a refrigerant not flowing. The present invention comprises: a high stage-side refrigerant circuit (2) in which a high stage-side heat transfer medium heat exchanger (11) and a cascade heat exchanger (13) that perform heat exchange with a heat transfer medium are sequentially connected via refrigerant piping; a low stage-side refrigerant circuit (3) in which the cascade heat exchanger (13), a low stage-side heat transfer medium heat exchanger (24) and a low stage-side heat exchanger (22) that are connected in parallel to the cascade heat exchanger (13) and that perform heat exchange with a heat transfer medium are sequentially connected via refrigerant piping; and a control unit (5) which controls the high stage-side refrigerant circuit (2) and the low stage-side refrigerant circuit (3). The control unit (5) is capable of switching between a single-stage operation and a dual-stage operation. The low stage-side heat transfer medium heat exchanger (24) is provided with low stage-side blockage means (40), (41). The high stage-side heat transfer medium heat exchanger (11) is provided with high stage-side blockage means (42), (43).

This application discloses a thermal management module leakage testing device and a thermal management module testing method, belonging to the field of automotive parts technology. The thermal management module leakage testing device includes a simulation component, a first temperature detection component, and a second temperature detection component. The simulation component is connected to the thermal management module to form a loop, and can change the flow rate and temperature of the heat exchange medium in the loop. The first temperature detection component is connected to the simulation component and is used to detect the temperature of the heat exchange medium at the outlet of the thermal management module. The second temperature detection component is connected to the simulation component and is used to detect the temperature of the heat exchange medium at the inlet of the thermal management module. This application obtains more accurate test results by setting the first and second temperature detection components in each loop to obtain the temperature of the heat exchange medium at the outlet and inlet of the thermal management module, thereby calculating the heat leakage of the heat exchange medium in each loop at the thermal management module.

The application discloses a superconducting charging cable of fault current limiting type, and mainly solves the problems that existing superconducting cables cannot be used for bidirectional direct-current high-power charging and have complex structures. The superconducting charging cable comprises a cable framework and liquid nitrogen passage (1), a composite conductor layer (2) and a thermal insulation shell (3). The cable framework supports the composite conductor layer and the thermal insulation shell. The composite conductor layer is composed of inner and outer superconducting tape layers and inner and outer fault current limiting stabilizing layers, and is wrapped on the cable framework. The inner composite conductor layer and the outer composite conductor layer are separated by using an intermediate layer insulating bushing, so that the bidirectional direct-current charging function of the superconducting cable is realized. The fault current limiting stabilizing layer is armored on the superconducting tape layer, so that the fault current limiting function of the superconducting cable is realized. The thermal insulation shell is wrapped on the outer liquid nitrogen bellows, so that the heat leakage of the cable body to the outside is greatly reduced. The superconducting charging cable has a compact structure, does not need to use a fault current limiter, and can be used for connecting electrode terminals to perform high-power direct-current fast charging on electric vehicles.

The utility model discloses an energy -saving ultrapure water circulating heating system, specifically related to water circulating heating technical field, including the water storage bucket, the recessed plate is hinged to the water storage bucket top, the convex plate is hinged to the water storage bucket top, the recessed plate and convex plate are the meshing relation, the recessed plate top intercommunication has the water outlet pipe, the water pump is installed in the water outlet pipe middle part, the fixed plate is installed to the water storage bucket bottom, a plurality of heating devices are fixedly connected to the fixed plate top, the heating wire is installed to heating device side wall, the return pipe is fixedly connected to the convex plate top, the return pipe and water storage bucket middle part intercommunication, through being equipped with recessed plate and convex plate in water storage bucket top, can close the water storage bucket again, make recessed plate and convex plate make recessed and convex portion engage, reduce the problem of the heat leakage in the water storage bucket middle part, and this device can realize the circulating use to the ultrapure water simultaneously, has increased the effect of resource utilization, thereby is more environmental protection.

The present application belongs to the technical field of heat preservation, and particularly relates to a structure for effectively reducing heat leakage of metal heat preservation in a nuclear power plant, which is applied to heat preservation of annular gaps between metal heat preservation blocks, instrument pipe gaps and tee pipe sections in the nuclear power plant. A long T-shaped heat preservation block is installed at a specified position of a pipeline, and a metal heat preservation block is abutted with the long T-shaped heat preservation block to ensure that the annular gap position is dense. A long L-shaped heat preservation block is installed at an instrument branch pipe, and the metal heat preservation block is abutted with the long L-shaped heat preservation block. Heat preservation of the tee pipe section is divided into four metal heat preservation blocks which are spliced through a buckle abutment mode. The long T-shaped heat preservation block is abutted with the metal heat preservation block at the upper annular gap and the horizontal pipe section annular gap position. The present application is favorable for improving the heat preservation performance effect of the metal heat preservation and the on-site disassembly and assembly work efficiency, can greatly reduce on-site heat leakage, effectively reduce heat dissipation of the nuclear power plant equipment / system, reduce heat loss of each system in the production plant during operation of the unit, and improve the economy of the unit.

The present disclosure relates to a hydrogenation system of a hydrogenation station, which comprises a liquid hydrogen storage tank and a spray tank, wherein the liquid hydrogen storage tank comprises a cooling pipe, an outer shell, and an inner tank for storing liquid hydrogen arranged in the outer shell, the inner tank comprises a tank liquid outlet, and the cooling pipe is arranged on the outer wall of the inner tank for cooling the inner tank; the spray tank comprises a spray liquid inlet, a spray liquid outlet, and a first spray gas inlet, the spray liquid inlet is communicated with the tank liquid outlet for passing the liquid hydrogen in the inner tank into the spray tank, the spray liquid outlet is communicated with the cooling inlet of the cooling pipe for passing the liquid hydrogen in the spray tank into the cooling pipe, and the first spray gas inlet is communicated with the cooling outlet of the cooling pipe for passing the hydrogen gas gasified from the liquid hydrogen in the cooling pipe into the spray tank. Through the above arrangement, the liquid hydrogen in the spray tank can be passed into the cooling pipe to cool the inner tank, reduce the net heat leakage of the inner tank, and further reduce the evaporation amount of the liquid hydrogen in the inner tank to reduce the risk of overpressure of the liquid hydrogen storage tank.

The application discloses a humanoid industrial robot and a nitrogen constant-temperature protection system for general digital electric appliances, and belongs to the technical field of equipment thermal management and air-tight protection. The application is based on the iteration optimization of two nitrogen protection patents of the applicant, and is provided with a double-cavity selection, modularized hierarchical selection, hidden pressing air supplement, three-level temperature control and three-working-condition operation structure, so that the problems of heat leakage, aging of components and elements, battery thermal runaway and damage of household appliances at high and low temperatures of the robot cavity are solved. After the cavity is vacuumized, high-purity nitrogen or liquid nitrogen is filled, a motor full-air-bag and a dynamic air-tight structure are provided, and air-bag sealing or self-sealing of the body can be selected; three gears are configured according to power: static protection, fan auxiliary cooling, closed nitrogen circulation and liquid nitrogen cooling, which can be independently used or used in combination with air cooling, water cooling and liquid cooling. The product is suitable for humanoid robots, digital appliances, household appliances and refrigeration supporting equipment, supports pre-installation before leaving the factory and non-destructive modification of finished products, and is suitable for a wide range of applications.

A kind of wide temperature range multilayer insulation material performance testing device and testing method with adjustable cold-heat boundary temperature, device includes vacuum sealed cabin, low-temperature refrigerator, hot boundary cavity, cold boundary cavity, heat flow meter rod, vacuum pumping system and data acquisition system, cold boundary cavity is conical column type structure, outer wall surface is coated with the multilayer insulation material to be measured, inner wall surface is equipped with temperature sensor;Heat flow meter rod upper end is connected with the second cold head of low-temperature refrigerator, lower end is connected with the bottom of cold boundary cavity, and multiple axial temperature sensors are embedded in the rod body, and top is equipped with electric heating wire;Hot boundary cavity is connected with the first cold head of low-temperature refrigerator through detachable copper braid, and outer wall surface is equipped with electric heating film and temperature sensor.The present application uses low-temperature refrigerator to replace liquid hydrogen, liquid nitrogen and other low-temperature liquids to provide cold quantity, realizes cold end temperature in 10~77K, hot end temperature in 50~350K wide temperature range continuous adjustable by the way of coarse adjustment of thermal resistance sheet and electric heating fine adjustment;Conical column type cold cavity structure effectively eliminates end face heat leakage effect, significantly improves measurement accuracy, and is suitable for performance evaluation of spacecraft liquid hydrogen storage tank insulation layer in high vacuum environment.

The application discloses a flat-plate loop heat pipe and application thereof. The flat-plate loop heat pipe comprises a liquid accumulator shell, a wick and an evaporator shell; the wick is arranged between the liquid accumulator shell and the evaporator shell; the liquid accumulator shell is provided with a boss structure matched with the outer periphery of the wick, the wick is connected with the liquid accumulator shell through the boss structure, and a liquid storage chamber is formed between the wick and the liquid accumulator shell; at least one liquid inlet is formed on the liquid accumulator shell; a plurality of plate rib structures are arranged on the side surface of the liquid accumulator shell close to the wick; the evaporator shell is internally provided with a gas collecting cavity and a plurality of evaporator grooves; the wick is tightly arranged on the evaporator grooves; and the gas collecting cavity is arranged at the side wall surface of the evaporator shell. The design of the flat-plate loop heat pipe can reduce heat leakage, reduce thermal resistance, improve heat conduction efficiency, has high rigidity and durability, can inhibit pressure fluctuation impact, can guarantee long-term stable operation of the heat pipe and can improve heat transfer response speed.

This invention proposes a liquid hydrogen storage tank for unmanned aerial vehicles (UAVs), specifically relating to the field of liquid hydrogen storage technology. The UAV liquid hydrogen storage tank includes a support structure, an inner tank, and an outer tank. The support structure includes a support ring. The inner tank is disposed inside the outer tank, and a vacuum is created between the inner and outer tanks. A support ring is provided between the outer side of the inner tank and the inner side of the outer tank. The inner side of the support ring is connected to the outer side of the inner tank, and the outer side of the support ring is connected to the inner side of the outer tank. The inner tank has a support sleeve, which is connected to the outer tank via a spring-loaded point-contact support assembly. This invention utilizes a support ring in conjunction with a spring-loaded point-contact assembly for support, enabling the inner tank to maintain good strength and reduce heat leakage even when filled with liquid hydrogen and undergoing cold contraction. Furthermore, it reduces the overall weight of the storage tank.

The utility model discloses a kind of temperature cycling temperature control system and its low-temperature cold source unit, cold source valve box is equipped with the first regenerative outlet and first cold quantity import respectively with refrigerator input end and output end connection, regenerator, first outlet switch valve V13 and first import switch valve V14 are equipped in cold source valve box, first vacuum pump is used to vacuumize cold source valve box, first regenerative outlet is connected in proper order high temperature passage of regenerator, circulating pump, first buffer tank, low temperature passage of regenerator and first import switch valve V14. Through the above optimization design, main pipeline is arranged in cold source valve box, and the inside of valve box is evacuated to form vacuum environment, reduce the convection heat transfer of residual gas molecules in pipeline, reduce the heat leakage of low-temperature working medium, ensure the back gas low-temperature temperature of nitrogen, to maximize the realization of cold quantity recovery and energy saving utilization, simultaneously, buffer tank is set in the inlet end of circulating pump, guarantee the pressure stability of pipeline system, reduce the fluctuation of pipeline system pressure.

The utility model provides a kind of high temperature refractory brick with thermal stability, it is related to refractory brick technical field, including main body mechanism, the main body mechanism includes protective layer, the inside of the protective layer is provided with heat insulating layer, the inner wall of the heat insulating layer is provided with connecting layer, the outer surface of the protective layer is provided with protective coating, the inside of the main body mechanism is provided with inlay heat insulation mechanism, the inlay heat insulation mechanism includes heat insulation shell, the inside of the heat insulation shell is provided with support piece, the both sides of the support piece are fixedly connected with fixed ring.The utility model, the protective layer made of aluminosilicate material has excellent high-temperature resistance and oxidation resistance, can withstand extreme temperature changes, while protecting the internal structure of brick body from the direct influence of high temperature, the internal expansion ceramic material has good thermal insulation effect, can effectively reduce heat conduction, maintain external temperature stable, prevent heat leakage, to improve the thermal stability of brick body in high temperature environment.