Title:
DOUBLE REFRIGERANT PIPE
Document Type and Number:
Japanese Patent JP2009150611
Kind Code:
A
Abstract:
To provide a double refrigerant pipe for a liquid-gas heat exchange circuit in a water heater, which is constructed to reduce or prevent the occurrence of abnormal noises (chattering noises) due to inner and outer tubes having contact with each other in a method superior in cost-performance.
The refrigerant pipe is bent on the way of a piping linear portion at an angle of 90 (or -90) to 180 to the bending direction of both ends of the linear portion, when molded. The inner and outer tubes of the double refrigerant pipe have forcible contact with each other to reduce or prevent the occurrence of abnormal noises (chattering noises), thus improving comfortability in working environment.
Inventors:
OYABU KEIKO
ONO KATSUTOSHI
SHIRAI KENJI
ONO KATSUTOSHI
SHIRAI KENJI
Application Number:
JP2007329714A
Publication Date:
July 09, 2009
Filing Date:
December 21, 2007
Export Citation:
Assignee:
PANASONIC CORP
International Classes:
F24H9/00; F28D7/10
Attorney, Agent or Firm:
Fumio Iwahashi
Hiroki Naito
Daisuke Nagano
Hiroki Naito
Daisuke Nagano
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