Auger type ice making machine

摘要

A bypass passage (26) is provided between a discharge pipe (21a) and a suction pipe (21b) of a compressor (21) being a component of an auger type refrigeration circuit, for allowing a hot gas on the high-pressure side of the circuit to recirculate back to the low-pressure side. An electromagnetic valve (27) is disposed on the bypass passage, and an ammeter (29) is provided to a geared motor (25) that drives an auger, which detects an overcurrent value indicative of an overload acting on the geared motor. In response to detection of an overcurrent value by the ammeter (29), the electromagnetic valve (27) operates to allow a hot gas on the high-pressure side to be supplied to the low-pressure side through the bypass passage (26). Other embodiments use a temperature sensor (30,33) as indicator for actuation of the electromagnetic valve (27) or for controlling a condenser fan (35) or the compressor (21).