A cross-tube heat exchanger and a pulse tube refrigerator with the heat exchanger

Abstract

The invention relates to a cross-tube heat exchanger and a pulse tube refrigerator with the heat exchanger, belonging to the technical field of low-temperature refrigeration. It includes a cylinder body and an upper flange and a lower flange respectively arranged at the upper and lower ends of the cylinder body. It is characterized in that a number of thin heat exchange tubes are arranged in the cylinder body, and the heat exchange thin tubes are connected to form a first A medium channel, a second medium channel is formed between the tube wall of the thin heat exchange tube and the inner wall of the cylinder. Increase the heat exchange area and enhance the heat exchange efficiency by using thin heat exchange tubes. At the same time, provide gas lateral flow channels, introduce radial flow on the gas working medium side, and transform the original heat transfer form of the gas working medium in the heat exchanger. For the coupling of heat conduction and gas self-mixing, the radial temperature distribution of the working fluid in the heat exchanger and the outlet is more uniform, and the uneven temperature distribution at the inlet of the regenerator is alleviated, and finally the problem of non-uniform temperature of the regenerator is optimized to reduce heat recovery The loss of the device is reduced, and the cooling performance of the whole machine is finally improved.

Description

technical field [0001] The invention relates to the technical field of low-temperature refrigeration, in particular to a cross-tube heat exchanger and a pulse tube refrigerator with the heat exchanger. Background technique [0002] As a low-temperature refrigerator, the pulse tube refrigerator has become a research hotspot in the field of cryogenic refrigerators due to its characteristics of no moving parts at the cold end, simple structure, small mechanical vibration, high reliability at low temperatures, and long working life. widely. [0003] At present, the main problems faced by high-power pulse tube refrigerators are: impedance matching between compressor and cold head, insufficient heat transfer capacity under alternating flow, uneven temperature distribution of regenerator, etc., which limit the high-power pulse tube refrigerator. Development of refrigerators. [0004] For the Stirling-type pulse tube refrigerator with a hundred-watt-level cooling capacity in the l...

AI Technical Summary

Problems solved by technology

[0003] At present, the main problems faced by high-power pulse tube refrigerators are: impedance matching between compressor and cold head, insufficient heat transfer capacity under alternating flow, uneven temperature distribution of regenerator, etc., which limit the high-power pulse tube refrigerator. Development of refrigerators

At present, the shell-and-tube heat exchanger widely used in pulse tube refrigerators still has the problem of insufficient heat transfer capacity, and the temperature at the hot end of the regenerator is much higher than normal temperature; The uneven temperature at the inlet of the hot end of the regenerator is a possible cause of the uneven temperature distribution in the middle of the regenerator

Images