PURPOSE: To permit the constitution of multi-refrigerating machine easily by a method wherein pipelines and instruments, which are necessary for connecting a plurality of refrigerating machines, are contained in one cabinet so as to permit the combination of a plurality of refrigerating machines freely upon installation.
CONSTITUTION: The principal instruments of refrigerating machine 2, 3 are constituted of compressors 2a, 3a, liquid receivers 2c, 3c and accumulators 2d, 3d. An oil separator 1a, non-return valves 1b, 1c and pipelines for connection are contained in a cabinet inside a multi-pipeline kid 1. High-pressure gas pipelines from the compressors 2a, 3a are joined in the multi-pipeline kid 1 and enter into the oil separator 1a, then, are branched again after the oil separator 1a and are connected to the condensers 2b, 3b. High-pressure refrigerant, condensed in the condensers 2b, 3b, enters into the liquid receivers 2c, 3c and is connected again in the multi-pipeline kid 1, then, is sent to low-pressure side instruments. Low-pressure gas, evaporated from the low-pressure side instruments, is branched in the multi-pipeline kid 1 and enters into the compressors 2a, 3a through the accumulators 2d, 3d thereby forming a refrigerating cycle.
HIRAOKA SEIJI
KIKUCHI SHOJI
IKEDA TAKASHI
HAKIRI OSAMU
HITACHI SHIMIZU ENG KK
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