Method for controlling operation of ice-making machine

Abstract

A method for controlling an operation of an ice-making machine configured to make ice by cooling a medium to be cooled, through heat exchange with a refrigerant. The method includes increasing an evaporation temperature of the refrigerant to be supplied to the ice-making machine when a drive current for an ice scraper of the ice-making machine is more than a first current value.

1 . A method for controlling an operation of an ice-making machine configured to make ice by cooling a medium to be cooled, through heat exchange with a refrigerant in a refrigerant circuit including a compressor,
 the method comprising:   increasing an evaporation temperature of the refrigerant to be supplied to the ice-making machine when a drive current for an ice scraper of the ice-making machine is more than a first current value,   stopping the operation of the compressor and continuing the operation of the ice scraper when the drive current is more than a second current value that is larger than the first current value,   restarting the operation of the compressor when the drive current decreases to a predetermined value.   
     
     
         2 . The method according to  claim 1 , comprising:
 increasing the evaporation temperature stepwise in accordance with an excess of the current.   
     
     
         3 . (canceled) 
     
     
         4 . A method for controlling an operation of an ice-making machine configured to make ice by cooling a medium to be cooled, through heat exchange with a refrigerant in a refrigerant circuit including a compressor,
 the method comprising:   increasing an evaporation temperature of the refrigerant to be supplied to the ice-making machine when a pressure difference between a pressure of the medium to be cooled at an inlet of the ice-making machine and a pressure of the medium to be cooled at an outlet of the ice-making machine is more than a first pressure value,   stopping the operation of the compressor and continuing the operation of the ice scraper when the pressure difference is more than a second pressure value that is larger than the first pressure value,   restarting the operation of the compressor when the pressure difference decreases to a predetermined value.   
     
     
         5 . The method according to  claim 4 , comprising:
 increasing the evaporation temperature stepwise in accordance with an excess of the pressure difference.   
     
     
         6 . (canceled)