A heat pipe heat transfer system at the low temperature end of a low temperature refrigerator

Abstract

The invention relates to a heat pipe heat transfer system at a low-temperature end of a low-temperature refrigerator. The heat pipe heat transfer system comprises a cold source and a heat pipe heat transfer module, wherein the cold source is used for supplying cold, and the heat pipe heat transfer module is used for transferring the cold into the low-temperature refrigerator; the heat pipe heat transfer module comprises a heat exchange block connected with the cold source; the heat exchange block is also connected with at least one heat pipe; the at least one heat pipe is arranged on a low-temperature refrigerator liner, and low-temperature cycle working fluid fills the at least one heat pipe. The structure size of the heat transfer system is reduced, and the weight of the heat transfer system is reduced; by adopting a modular design mode, the quality consistency in volume production is guaranteed; the large-scale production of an ultra-low temperature refrigerator adopting a novel low-temperature refrigerating machine is favorably realized; the efficient heat transfer bottleneck problem between the compact refrigerating end of the novel low-temperature refrigerating machine and the high-volume refrigerating space of the low-temperature refrigerator is solved; the cold of the novel low-temperature refrigerating machine is rapidly and efficiently transferred to the low-temperature refrigerator; compared with the traditional refrigerating system, the heat pipe heat transfer system has the advantages that the problem lubricating oil is hard to return at low temperature is eliminated, and the phenomenon that the refrigerating system is blocked due to the fact that the lubricating oil condenses is avoided.

Description

technical field [0001] The invention relates to the field of refrigeration equipment, in particular to a heat pipe heat transfer system at the low temperature end of a low temperature refrigerator. Background technique [0002] With the rapid development of the biological and medical industries, the long-term storage of relevant biological and medical samples, reagents and other biological materials requires more and more ultra-low temperature refrigerators. Such ultra-low temperature refrigerators generally require storage temperatures below -70°C and a stable refrigeration system to achieve long-term reliable storage of biological materials. [0003] Refrigerators (including Stirling refrigerators, pulse tube refrigerators, and G-M refrigerators) have relatively high refrigeration efficiency under large temperature difference refrigeration conditions (refrigeration temperature difference > 60°C). Especially in the refrigeration system of ultra-low temperature refrigera...

AI Technical Summary

Problems solved by technology

For the method of using the combination of fan and radiator to enhance the heat transfer efficiency of the cold end of the refrigerator through forced convection, because the internal temperature of the ultra-low temperature refrigerator is too low (generally below -70 ℃), it is easy to cause the bearing oil lubrication failure of the fan motor

If the fan motor is installed externally and the blades in the box are driven to rotate through the transmission shaft, the structure is too complicated, and at the same time, it is easy to cause large heat leakage from the low-temperature refrigerator box, resulting in increased load and power consumption.

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