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

Abstract

The invention discloses a direct cooling ice-making system and its control method for balancing the load of a compressor. A second heat exchange tube is added to the side plate of the composite ice mold, and its liquid inlet end is connected with a liquid supply main pipe for supplying The liquid main pipe is connected to the refrigerant tank through a pipeline with a refrigerant liquid supply control valve and a refrigerant water pump; the liquid outlet end of the second heat exchange pipe is connected to a liquid return main pipe, and the liquid return main pipe is connected to the refrigerant tank through a refrigerant return liquid control valve . The invention belongs to a double-effect ice-making method. It not only has the advantages of high heat exchange efficiency of direct cooling, but also has the advantage of load balance of indirect ice-making compressors. During the ice-making process, the cooling of the compression condensing unit and the cooling of the refrigerant tank cooperate with each other to provide cooling energy for ice-making, which belongs to the double-effect ice-making method. At the same time, the refrigerant in the refrigerant box also has the function of balancing the cooling capacity during the ice making process.

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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