Low-heat-leakage lead structure

Abstract

The invention is applicable to the field of low-temperature electromagnetism, and discloses a low-heat-leakage lead structure, which comprises a transmitter framework, a transmitter input conducting wire and a transmitter output conducting wire, wherein the transmitter input conducting wire is wound on the transmitter framework by a plurality of turns n1, the transmitter output conducting wire is wound on the transmitter framework by a plurality of turns n2, n1 is greater than n2, the transmitter input conducting wire is provided with a first lead wire end and a second lead wire end, the first lead wire end and the second lead wire end are used for being connected with a room temperature area sensor, the transmitter output conducting wire is provided with a third lead wire end and a fourth lead wire end, and the third lead wire end and the fourth lead wire end are used for being connected with a low temperature area sensor. the low-heat-leakage lead structure can improve the bearing capacity of the input lead of the transmitter, so that the heat leakage of the lead can be reduced, and the cooling capacity load of a low-temperature system is reduced.

Description

technical field [0001] The invention relates to the field of low-temperature electromagnetics, in particular to a low-leakage thermal lead structure. Background technique [0002] The calculation of low-temperature heat leakage has always been a problem that must be considered in low-temperature experiments, especially as the temperature drops, the cost of obtaining cooling capacity gradually increases. A large heat leak will not only result in a greater rate of refrigerant consumption or a refrigerator requiring greater cooling capacity, but will also cause greater noise to the experiment. Theoretically, heat leakage is proportional to the cross-sectional area of ​​the wire and the thermal conductivity of the wire. The conventional method to reduce heat leakage is to choose a wire with low thermal conductivity and reduce the diameter of the wire as much as possible. Phosphor bronze wire is a commonly used lead material at low temperature. Its thermal conductivity is severa...

AI Technical Summary

Problems solved by technology

Phosphor bronze wire is a commonly used lead material at low temperature. Its thermal conductivity is several times higher than that of copper. It is widely used in low temperature. However, the resistance of this material is large. When there is a large current requirement, its thermal effect of resistance is large. , and have to use copper wire or other thicker wires

However, the high-current line is generally not used all the time, and the heat leakage is always going on.

[0003] Low-temperature leads experience temperature changes from room temperature to low temperature, because the conductivity of conventional conductors generally decreases as the temperature drops, while the room temperature part of the same wire has greater heating power and the highest temperature, and the current carrying capacity is limited by room temperature part

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