Abnormality detecting method for automatic ice making machine

Abstract

Disclosed is an abnormality detecting method for an automatic ice making machine that can quickly detect an abnormality to delay an ice-making time or an abnormality to shorten the ice-making time, if occurred. A down flow type ice making machine includes two ice making units, one control means, and an ice storage room. Each ice making unit has an ice making part, an ice-making water tank that stores ice-making water, a circulation pump that feeds the ice-making water stored in the ice-making water tank to the ice making part, and a float switch that detects the amount of the ice-making water in the ice-making water tank. Upon elapse of a preset first abnormality occurring time from a time of first detection of an ice-making complete water level by the float switch in any one of the ice making units, when the float switch in any one of the other ice making units has not detected the ice-making complete water level, the control means decides that an abnormality has occurred in the ice making unit.

1 . An abnormality detecting method for an automatic ice making machine comprising a plurality of ice making units each having an ice making part to be cooled by a refrigerant supplied from a freezing system, an ice-making water tank that stores ice-making water, a circulation pump that feeds the ice-making water stored in the ice-making water tank to the ice making part, and detection means provided at the ice-making water tank to detect an amount of the ice-making water in the ice-making water tank, and configured to collect unfrozen water which has been fed to the ice making part but has not been frozen into the ice-making water tank, and control means deciding that ice making is completed when every detection means detects that the ice-making water in the ice-making water tank has reached an ice-making complete water level at a time of an ice making operation,
 wherein upon elapse of a preset first abnormality occurring time from a time of first detection of the ice-making complete water level by the detection means in any one of the ice making units, when the detection means in any one of the other ice making units has not detected the ice-making complete water level, the control means decides that an abnormality has occurred.   
   
   
       2 . The abnormality detecting method according to  claim 1 , wherein when the detection means in every ice making unit has detected the ice-making complete water level until occurrence of a preset second abnormality occurring time from initiation of the ice making operation, the control means decides that an abnormality has occurred.