Interpenetration bypass type laminated rapid pre-cooling throttling refrigerator and control method

Abstract

The invention provides a penetrating bypass type laminated rapid precooling throttling refrigerator which comprises a fixing unit and a cooling unit, the fixing unit comprises an upper cover plate and a lower cover plate, the upper cover plate is provided with a first main inlet and a second main inlet, and the lower cover plate is provided with a main outlet; the at least one refrigeration unit is arranged between the upper cover plate and the lower cover plate and comprises a high-pressure plate sheet, a rapid bypass pre-cooling plate sheet and a low-pressure plate sheet, the high-pressure plate sheet comprises a first inlet part, a regenerative throttling part and a first expansion cavity, the first inlet part comprises a first rapid pre-cooling inlet and a first normal refrigeration inlet, and the second inlet part comprises a second rapid pre-cooling inlet and a second normal refrigeration inlet; the first rapid pre-cooling inlet is communicated with the first main inlet, the first normal refrigeration inlet is communicated with the second main inlet and the regenerative throttling part, the first expansion cavity is located at the tail of the high-pressure plate and communicated with the regenerative throttling part, and the rapid bypass pre-cooling plate is arranged between the high-pressure plate and the low-pressure plate in a penetrating mode. Comprising a second inlet part, a rapid pre-cooling part and a second expansion cavity, the low-pressure plate sheet comprises an evaporation cavity, a backheating backflow part and an outlet part, and the outlet part is provided with a low-pressure outlet communicating with the main outlet.

Description

technical field [0001] The invention belongs to the field of enhanced heat exchange throttling refrigeration, and particularly relates to an interspersed bypass type laminated rapid precooling throttling refrigerator and a control method. Background technique [0002] The micro-throttle refrigerator has the characteristics of simple structure, small size and rapid cooling, and is widely used in medical, military, industrial and other fields such as infrared detectors, cryosurgery probes, missile guidance systems, and electronic equipment cooling. [0003] Under adiabatic conditions, the stable flow process of high-pressure gas flowing to the low-pressure side through porous plugs, small holes, small valves, tiny channels, capillaries, etc. is called the throttling process, and this phenomenon is also known as the Joule-Thomson effect. . In recent years, with the development of microchannel technology, microchannel J-T effect throttling refrigerators have been widely researc...

AI Technical Summary

Problems solved by technology

[0004] The tiny channels etched in the micro-channel throttling refrigerator itself are used to generate a pressure drop, and then produce a throttling cooling effect, but the paradox is that the structure of the tiny throttling channel causes the current refrigerator to have a very small flow rate and a micro The cooling speed of the channel throttling refrigerator is extremely slow, and it is completely unsuitable for some applications that require rapid cooling and low cold head temperature

Although a single tiny channel etched by a micro-channel throttling refrigerator can produce a lower temperature, its cooling capacity is limited, so multiple channels need to be stacked in parallel or multi-layered, which will also bring a large heat capacity of the specimen. Seriously hinder the cooling speed of the refrigerator

In summary, the current micro-channel throttling refrigerators have the problems of small flow, large heat capacity, and extremely slow cooling

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