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(12) PATENT APPLICATION PUBLICATION
(19) INDIA (21) APPLICATION No:
2547/MAS/1997A
(22) Date of filing of Application:07/11/1997 (43) Publication Date: 09/06/2006
(54) Title of the invention:
A HEAT EXCHANGER AND A
METHOD OF PRODUCING THE SAME.
(51) International classification: F2B F 1/00
(31) Priority Document No. HEI 8-296088.
(32) Priority Date:08/11/1996
(33) Name of priority country: JAPAN.
(87) WIPO No.:
(61) Patent of addition to
Application No.:
Filed on:
(62) Divisional to
Application No.:
Filed on:
(71) Name of Applicant
MATSUSHITA ELECTRIC INDUSTRIAL
CO LTD
Address of Applicant:
1006, OAZA-KADOMA,
KADOMA-SHI, OSAKA-FU 571,
JAPAN.
(72) Name of the Inventor(s):
MASAHIRO FUJIKAWA,
KIYOSHI MATSUMOTO,
HIROHARU KURISUTANI.
(57) Abstract
The present invention relates to a heat exchanger comprising: a substantially cylindrical metal cylinder internally
having fins for receiving heat from a combustion gas and also having openings at both ends through which the
combustion gas passes, a metal pipe, through which a refrigerant flows, said metal pipe being spirally wound around
the outer surface of said metal cylinder in close contact with the outer surface thereof, and fixtures secured to said
metal cylinder for securing both ends of said metal pipe to said metal cylinder. The present invention also relates to a
method of manufacturing a heat exchanger.
The Patent Office Journal 09/06/2006 10766