Double-wall pipe and refrigerant cycle device using the same
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United States of America Patent
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N/A
Issued Date -
May 11, 2006
app pub date -
Nov 8, 2005
filing date -
Nov 9, 2004
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A double-wall pipe includes an outer pipe provided with first and second openings, respectively, at first and second end parts of the outer pipe in a pipe longitudinal direction, and an inner pipe inserted in the outer pipe to define a passage between the outer pipe and the inner pipe. An inlet portion is connected to the outer pipe to communicate with the passage through the first opening, and an outlet portion is connected to the outer pipe to communicate with the passage through the second opening. In the double-wall pipe, the outer pipe and the inner pipe can be disposed to define an expanded portion having an expanded sectional area in the first passage, and the expanded portion can be provided at least at a portion near the inlet portion and the outer portion. The inner pipe can be provided with plural grooves in the double-wall pipe.
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