Protective device of auger type ice making machine

Abstract

A protective device of an auger type ice making machine capable of coping with occurrence of a problem with a simple configuration. A protective device comprises a delay timer which starts counting simultaneously with the start of an auger motor. A compressor is started by the count up of the delay timer so as to start the ice making operation. At the same time, the energization to a shock relay is started, and a current-voltage converter contained therein detects a change in the current from the auger motor and converts into a voltage change followed by outputting. If no overload is applied on the auger motor and if the output voltage from the current-voltage converter is not an overload output voltage according to the overload current of the motor, steady operation continues without change. In contrast, if the output voltage from the current-voltage converter is an overload output voltage, the operation of the auger motor and compressor is stopped.

1 . An auger type ice making machine which comprises a refrigeration casing having an evaporator connected to a refrigerating system including a compressor on an external surface thereof, for freezing ice making water supplied inside on an inner wall surface thereof; an auger screw rotatably provided inside the casing, for scraping and transferring ice frozen on the inner wall surface of the casing; and an auger motor for driving the auger screw by rotation, configured so that said compressor is started so as to start the ice making operation after the auger screw is driven by rotation by said auger motor, wherein 
 a protective device of the auger type ice making machine comprises protective means which starts abnormality monitoring simultaneously with the start of said compressor, for control said auger motor to stop when detecting a problem occurring at steady operation of the motor.    
   
   
       2 . The protective device of the auger type ice making machine according to  claim 1 , wherein a current-voltage converter for generating an output voltage in response to a change in the current of said auger motor; and said protective means starts watching out for an output voltage from said current-voltage converter simultaneously with the start of said compressor, set so as to control said auger motor to stop when detecting an output voltage in response to the overload current occurring during steady operation of the motor.