A pulse tube refrigeration system with four-way reversing valve

Abstract

The invention discloses a pulse pipe type refrigeration system with a four-way reverse valve. The pulse pipe type refrigeration system comprises a compressor and an air reservoir and further comprisesa first heat exchanger, an empty pipe, a heat regenerator unit, a connecting pipe and a pulse pipe unit, all of which are sequentially connected. The four-way reverse valve is further included, and four connectors of the four-way reverse valve are connected with the compressor, the air reservoir, the pulse pipe unit and the first heat exchanger correspondingly. The four-way reverse valve comprises a valve element, the valve element is electromagnetically driven, and the pulse pipe unit is controlled to communicate with the compressor or the air reservoir. Compared with a traditional pulse pipe refrigerator, the four-way reverse valve is adopted in the pulse pipe type refrigeration system, the pulse pipe refrigerator can provide the cooling capacity and can also provide heat, and temperature adjustment is more conveniently conducted.

Description

technical field [0001] The invention relates to the field of low-temperature pulse tube refrigerators, in particular to a pulse tube refrigeration system with a four-way reversing valve. Background technique [0002] With the rapid development of today's science and technology and the great advancement of the laws of physics, the research and application of various substances in low-temperature environments have become more and more common, such as infrared equipment in the military, nuclear magnetic resonance imagers in medical treatment, and aerospace technology. The low temperature environment in China and the superconducting technology applied in more and more fields have put forward more and more stringent requirements for cryogenic cooling equipment. Pulse tube refrigerators have attracted extensive attention due to their low temperature without moving parts, small mechanical vibration, and simple structure. [0003] For the current application, not only the cryogenic...

AI Technical Summary

Problems solved by technology

The method of natural rewarming by turning off the refrigeration system has the advantage of saving costs, but the disadvantage is that since the object to be cooled is usually in a vacuum container such as a Dewar bottle, the existence of a vacuum environment makes heat exchange such as heat conduction and convection The heat transfer coefficient of the mode is greatly reduced, and the vacuum environment in order to isolate the cooling capacity during normal operation also isolates the heat from the external environment when heating is required, making the rewarming process very long

However, when the flow in the cryogenic refrigerator is an alternating flow, the working medium is an oscillating reciprocating motion, which is close to a sine wave mode. In this alternating system, there is no use of a four-way reversing valve.

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