63results about How to "Inhibition of convective heat transfer" patented technology

The invention discloses a biological sample liquid nitrogen tank refrigerator which comprises a liquid nitrogen tank refrigerator body and two compressor refrigerating systems. The liquid nitrogen tank refrigerator body comprises an inner tank body, an outer tank body and a vacuum interlayer located between the inner tank body and the outer tank body; the liquid nitrogen tank refrigerator body further comprises a liquid nitrogen filling pipe for filling liquid nitrogen into the inner tank body; and each compressor refrigerating system comprises a condenser, a compressor, a condensation evaporator, a throttling device and an evaporative cooling coil, wherein the two evaporative cooling coils are wound on the inner wall of the inner tank body in a staggered mode. According to the biological sample liquid nitrogen tank refrigerator, liquid nitrogen refrigeration and mechanical compression refrigeration are combined, a vacuum heat insulation layer is used for heat insulation, and therefore the biological sample liquid nitrogen tank refrigerator has the advantages of being good in energy-saving effect and capable of ensuring safety of stored biological samples, the use mode is flexible, and application prospects are wide.

The invention relates to a low-temperature medium liquefaction device which comprises a Dewar and a heat exchange assembly, wherein the heat exchange assembly comprises a heat exchanger, a sleeve, a refrigerator cold head, a collector tube and a transmission tube; the upper end of the sleeve is hermetically and fixedly connected to the upper part of an inner cavity of the Dewar, and the lower endof the sleeve is hermetically and fixedly communicated with the collector tube; one end of the transmission tube is hermetically and fixedly communicated with the lower part of the collector tube, the middle part of the transmission tube is hermetically and fixedly connected with the Dewar, and the other end of the transmission tube is communicated to a cooled object outside the Dewar; the upper part of the refrigerator cold head is hermetically and fixedly connected with the Dewar, the lower part of the refrigerator cold head is arranged in the inner cavity of the sleeve, and the lower end of the refrigerator cold head is connected with the heat exchanger. The low-temperature medium liquefaction device disclosed by the invention has the advantages that: the heat transfer area at the low-temperature end of the refrigerator cold head is fully utilized, the heat leakage quantity is reduced, the working efficiency is improved, the energy resources are saved, the convenience for assembly and disassembly is achieved, and the manufacturing and maintaining cost is reduced.

The invention relates to a full-high vacuum horizontal LNG submersible pump tank, which includes a pump tank body, a submersible pump and a support. The outer casing of the liquid port is fixedly connected with a vacuum joint, and the vacuum joint of the outer casing of the liquid outlet pipe is connected with the inner space structure of the liquid outlet device, and together with the high vacuum insulation of the inner and outer cylinder interlayers of the pump pool, the submersible pump pool is formed as a whole with a full height Vacuum insulation structure. The invention adopts full-high vacuum heat insulation, which isolates all heat leakage paths of convection, conduction and radiation heat transfer, and has excellent cold preservation performance; the daily evaporation rate of the LNG liquid in the pump pool is higher than that of the vertical submersible pump pool of the prior art. The daily evaporation rate decreased by 21.5%~31.5%. And it has been extended to vehicle-mounted LNG transportation and filling vehicles, which has significantly improved the economic benefits of LNG filling stations and LNG transportation and filling vehicles.