Direct-cooling ice-making system for balancing compressor load and control method thereof

Abstract

The invention discloses a direct-cooling ice-making system for balancing the compressor load and a control method thereof. A second heat exchange pipe is additionally arranged in a composite ice mold side plate, the liquid inlet end of the second heat exchange pipe is connected with a liquid supply header pipe, and the liquid supply header pipe is connected with a refrigerant box through a pipeline with a refrigerant liquid supply control valve and a refrigerant water pump; and the liquid outlet end of the second heat exchange pipe is connected with a liquid return header pipe, and the liquid return header pipe is connected with the refrigerant box through a refrigerant liquid return control valve. The system and method belong to a double-effect ice making mode. The system has the advantage of high heat exchange efficiency of a direct-cooling type and also has the advantage of load balance of an indirect ice-making compressor. In the ice-making process, cold supply of a compression condensing unit and cold supply of the refrigerant box are matched with each other to provide ice-making cold energy, which belongs to the double-effect ice-making mode. Meanwhile, in the ice making process, the refrigerant in the refrigerant box also has the function of balancing the cooling capacity.

Description

technical field [0001] The invention relates to a direct cooling ice-making system and a control method thereof. Background technique [0002] As an ice-making system in the prior art, one way is a direct-cooling ice-making system, that is, a direct-refrigerant evaporation-type ice-making system. Another way is the indirect ice-making method, that is, the intercooling medium is cooled by the refrigerant, and then the cold medium is cooled to make ice, such as "an energy-saving cold storage ice-making system" disclosed in the Chinese invention patent application with the publication number CN105674654A , is an indirect ice-making system. The main disadvantage of the indirect ice-making method is that the cooling capacity required for ice-making needs to undergo secondary heat exchange. Therefore, the cooling efficiency of the refrigeration compressor is low. It also has the phenomenon of unbalanced ice production. [0003] In the existing direct-cooling ice-making system,...

AI Technical Summary

Problems solved by technology

The compressor load is too high in the early stage of ice making, the operating conditions are bad, the suction pressure and exhaust pressure are too high, which affects the service life of the compressor

In the later stage of ice making, the cooling load is small, the control of the refrigeration compressor is difficult, and liquid return occurs.

In severe cases, it will affect the service life of the refrigerator

In addition, during the ice making process, due to the uneven cooling supply, the freezing speed in each ice mold varies greatly

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