A method for determining the pipe diameter, a device for determining the pipe diameter, and a freezing device

摘要

A method for determining a pipe diameter of a refrigerating device capable of reducing a refrigerant to be filled, an apparatus for determining a pipe diameter, and a freezing device. A method of determining a pipe diameter of a liquid refrigerant communication pipe (5) in a refrigerating apparatus (1) capable of performing cooling operation and heating operation, characterized in that the cooling of the outdoor unit (2) and the indoor units (4a, 4b) Side piping diameter of the liquid-side refrigerant communication pipe 5 is determined on the basis of the capacity and the heating capability.