Ice making drum for drum type ice making machine

Abstract

An ice making drum with an improved ice making performance includes a cylindrical drum body, rotational shafts, and shaft members respectively provided at the end faces of the drum body. The drum body has refrigerant flow passages which are each defined by an outer wall portion forming an outer surface, an internal wall portion set apart from the outer wall portion inwardly in a radial direction, and adjoining partition portions extending between the outer wall portion and the internal wall portion. The whole drum body is integrally formed of the same metallic material.

1 . An ice making drum for a drum type ice making machine, which is configured to be rotatably disposed around a horizontal axis with a part of the ice making drum soaked in ice making water retained in an ice making tank, and produce ice on an outer surface of the ice making drum as a refrigerant is supplied thereto from a freezer and cooled, the ice making drum comprising:
 a drum body having refrigerant flow passages which are each defined by an outer wall portion forming an outer surface, an internal wall portion set apart by a predetermined distance from the outer wall portion inwardly in a radial direction, and partition portions extending between the outer wall portion and the internal wall portion and adjoining in a circumferential direction, and are arranged along a circumferential surface of the drum body and penetrating the circumferential surface in an axial direction, the drum body being integrally formed of a same metallic material; and   a pair of shaft members which are respectively attached to both end faces of the drum body and at least one of which is provided with a refrigerant circulation passage to the refrigerant flow passages.   
     
     
         2 . The ice making drum according to  claim 1 , wherein a cross section of the drum body in a radial direction thereof is formed in an approximately quadrangular shape which expands outward in the radial direction. 
     
     
         3 . The ice making drum according to  claim 1 , wherein a thickness of the internal wall portion is set thicker than a thickness of the outer wall portion. 
     
     
         4 . The ice making drum according to  claim 2 , wherein a thickness of the internal wall portion is set thicker than a thickness of the outer wall portion.