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    • 24. 发明专利
    • PIPING CONNECTION STRUCTURE OF REFRIGERATION CYCLE
    • JPH05172372A
    • 1993-07-09
    • JP34302391
    • 1991-12-25
    • MATSUSHITA ELECTRIC IND CO LTD
    • TOMITA SHIGEKI
    • F24F5/00
    • PURPOSE:To obviate the need of a pinch work for a sound for a sound elimination measure and prevent bad affection such as dust from being produced by disposing a mesh between a main circuit piping and a piping for connection with the main circuit piping. CONSTITUTION:A mash-like stainless net 12 is disposed and connected between a main refrigerant piping (main circuit piping) 10 and a copper connection piping 11 which forms a refrigerant encapsulating pipe or a pressure detection branch pipe. Thereupon, the main refrigerant piping 10 and the connection piping 11 are joined through copper brazing 13. A hole a of the size of the order of an inner diameter of the connection piping 11 is formed in the main refrigerant piping 10 and is covered with the net 12. Hereby, an air column resonance frequency generated by the hole a is shifted to the outside of an audio frequency region and hence such an air column resonance sound is eliminated. Further, the existence of the net 12 prevents dust from being mixed in or out.