6 results about "Thermal diode" patented technology

This invention discloses a high-vacuum low-temperature chamber, including a cavity, a sample stage located within the cavity, and further including a cold source module, a heat flow distribution module, a temperature equalization module, and a vacuum and cold shield module. The cold source module includes an external liquid nitrogen tank, a gas-liquid separation buffer tank, and a multi-channel solenoid valve array. The heat flow distribution module includes a multi-channel thermal diode, multiple thermal switches, and N temperature sensors for recording temperature response curves. Each channel of the multi-channel thermal diode is composed of a high thermal conductivity graphene film, with one end connected to the cold source and the other end connected to different areas of the sample stage. Each channel has a thermal switch based on a thermally induced phase change material. The temperature equalization module uses a high thermal conductivity graphite plate to ensure that heat can rapidly diffuse laterally once it enters the sample stage. The vacuum and cold shield module is a heatable regenerable cold shield with independent temperature control. Through online identification and rolling optimization, accurate tracking of the temperature trajectory is achieved without repeated manual parameter tuning, and it has adaptive capabilities.

The present application belongs to the technical field of semiconductor devices, and relates to a near-field thermal radiation device with thermal rectification and thermal stability, which is arranged in a vacuum cavity shell and comprises a negative thermal expansion substrate, an emitter, a thermal expansion substrate and a receiver. The negative thermal expansion substrate is arranged on a top wall in the vacuum cavity shell, the emitter is arranged on a side of the negative thermal expansion substrate away from the top wall of the vacuum cavity shell, the thermal expansion substrate is arranged on a bottom wall in the vacuum cavity shell, and the receiver is arranged on a side of the thermal expansion substrate away from the bottom wall of the vacuum cavity shell. The emitter and the receiver are used for near-field radiation heat transfer. By adjusting the temperature of the emitter and the receiver, the negative thermal expansion substrate and the thermal expansion substrate are expanded or contracted, the vacuum gap between the emitter and the receiver is changed, the heat flux of the near-field thermal radiation device is changed, and the near-field thermal radiation device realizes the functions of a thermal diode with thermal rectification and a thermal stabilizer with thermal stability.

This invention relates to the technical field of thermal diode walls, and more particularly to a thermal diode wall based on spectrally selective aerogel. The wall comprises, from the outside in, an outer glass layer, an aerogel layer, an absorption layer, and a phase change heat storage layer, arranged sequentially from the outside in. The aerogel layer is a spectrally selective aerogel composed of CsWO3 nanoparticle-modified silica aerogel. The layers are tightly bonded together to form an integrated wall structure. The thermal diode wall is integrally attached to the outer surface of the building wall, with the inner side of the phase change heat storage layer bonded to the outer surface of the building wall. The thermal diode wall provided by this invention allows the functional layers to work synergistically, enabling the wall to adaptively regulate the direction of heat flow according to seasonal changes, thereby reducing building heating and cooling energy consumption without relying on active energy input.

The application discloses a convection type flexible heat diode based on an asymmetric wetting structure, which comprises, from top to bottom, a water collection function film at an evaporation end, a super-hydrophobic function film at a condensation end and a flexible packaging film which are sequentially arranged and sealedly packaged, and a plurality of liquid-vapor transport channels are arranged in the super-hydrophobic function film at the condensation end. The evaporation end is hydrophilized and treated with hygroscopic salt, so that the evaporation end has high efficient hygroscopic and evaporation capacity. Meanwhile, the condensation end is constructed with hydrophobic columnar array pores, so that the condensation liquid drops are quickly separated and directionally returned. The binary design of 'hydrophilic evaporation / hydrophobic condensation' creates low-thermal-resistance and high-thermal-resistance heat transfer paths in the positive and reverse directions, so that high efficient heat rectification is realized.

The application belongs to the technical field of thermal radiation, and particularly relates to a radiation heat flow regulating device and application thereof. The radiation heat flow regulating device comprises at least two oppositely arranged radiation bodies, each of which comprises a radiation layer; at least one of the radiation bodies comprises a substrate and one or more organic polymer layers, wherein the organic polymer layer is arranged between the substrate and the radiation layer to reduce the radiation absorption of materials other than the radiation layer. The radiation spectrum mismatch between the organic polymer layer and the radiation layer can effectively reduce the heat energy absorbed by the substrate or other materials to establish an efficient heat radiation channel, which is beneficial to improving the thermal rectification ratio of the thermal rectifier and improving the output power and energy conversion efficiency of the thermal photovoltaic device. The radiation heat flow regulating device is prepared into a heat flow regulating device, such as a thermal diode, a thermal triode, a thermal photovoltaic device, a thermal switch, a thermal imager, a thermal lithography instrument and the like, which can effectively regulate the heat flow.