Anti-icing-plug self-defrosting type carbon dioxide opened refrigerating system and method

Abstract

The invention provides an anti-icing-plug self-defrosting type carbon dioxide opened refrigerating system, belonging to the field of safe lifesaving and environmental control in confined spaces. The system comprises a carbon dioxide steel cylinder (1), a stop valve (3), a first level throttling valve (4), a first level evaporator (5), a second level throttling valve (6), a second level evaporator (7) and a three-way change valve (8) in sequence, wherein a fist end of the three-way change valve (8) is connected with the second level evaporator (7), a second end of the three-way change valve (8) is connected with a pneumatic fan (9) and a third end of the three-way change valve (8) is connected with a compressed air steel cylinder (10). Due to taking the twice throttling and two level refrigeration measures, the system improves the evaporation temperature of the first level evaporator (5) and the second level evaporator (7), ensures that the evaporation temperature is higher than the freezing point of water, and prevents the icing plug of pipelines and the frosting of the evaporators; and the compressed air steel cylinder (10) is used for driving the pneumatic fan (9) to carry out auxiliary defrosting in extreme cases, thus improving the reliability of the system running.

Description

technical field [0001] The invention relates to an anti-icing self-defrosting carbon dioxide open refrigeration system, which belongs to the field of safety lifesaving and environmental control in confined spaces. Background technique [0002] With the advancement and development of science and technology and the improvement of the awareness of the rights and interests of human life, as a protection facility for human life after disasters and accidents, the emergency avoidance system has become a national focus. The emergency escape system in coal mines mainly includes refuge chambers or rescue cabins, which are used for escape, refuge and waiting for rescue when mine operators are in distress. They must have certain environmental control functions to meet the survival needs of escape personnel. The reliability of the refrigeration system, which is an important part of the system, is directly related to the temperature regulation and air purification of the closed space of t...

AI Technical Summary

Problems solved by technology

However, in practical applications, due to the moisture contained in carbon dioxide and the temperature as low as -50~-60°C after throttling, it is easy to cause problems such as pipeline ice blockage and evaporator frosting, and the reliability and stability of the system are relatively low. Poor, urgently need to improve the existing open carbon dioxide refrigeration system

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