Metal working – Method of mechanical manufacture – Heat exchanger or boiler making
Reexamination Certificate
1997-02-21
2001-10-30
Leo, Leonard (Department: 3743)
Metal working
Method of mechanical manufacture
Heat exchanger or boiler making
C029S890043, C165S173000, C165S174000
Reexamination Certificate
active
06308410
ABSTRACT:
The invention concerns a method for producing a heat exchanger comprising at least one fluid box delimited by a tubular wall and separated into compartments by at least one intermediate transverse partition, and a multiplicity of parallel tubes, each communicating with a compartment of the fluid box through an opening in the tubular wall, a method in which each partition is inserted into the tubular wall, through an open end thereof, in order to bring it to the position which it is to occupy, and the partition is immobilised by deformation of the tubular wall on each side thereof.
Such a method is described in FR-A-2 676 535. In this known method, the deformation of the tubular wall is produced in the form of beads extending continuously over the entire circumference thereof and consequently in particular in the of the perimeter in which the passage openings for the tubes are formed. It has been found that, when these openings produced before the beading, the latter gives rise to a deformation of the openings which may lead to difficulty in connecting the tubes to the fluid box and/or to sealing defects.
The invention relates notably to a method of the type defined in the introduction, and provides that the deformation is produced solely in at least one region of the perimeter of the tubular wall distinct from the one in which the openings are formed.
Surprisingly, limiting the deformation to one or more restricted regions of the perimeter does not impair the correct positioning of the partitions.
Optional characteristics of the invention, complementary or alternative, are set out below:
The deformation is produced in two regions of the perimeter disposed approximately symmetrically with each other with respect to an axial plane of the tubular wall passing through the centers of the openings.
The two regions are approximately diametrically opposed.
The deformations are practically localised at one point in the circumferential direction.
The ends of the tubular wall are closed off by transverse end partitions, the immobilization by deformation of the tubular wall being achieved both for the end partitions and for the intermediate partitions.
In order to deform the tubular wall, the latter is pressed in towards the inside of the fluid box.
The openings are produced before the transverse partitions are positioned and immobilized by deformation.
The tubular wall is soldered to the partition and/or to the tubes in a fluid tight manner.
The tubular wall is formed by a rolled sheet, two opposite edges of which are connected along a generating line of the wall.
The invention also has as its object a heat exchanger such as can be obtained by the method defined above, comprising at least one fluid box separated into compartments by at least one transverse partition, and a multiplicity of parallel tubes, each communicating with a compartment of the fluid box through an opening therein, the fluid box having a tubular wall through which the openings pass and which surrounds the edge of the partition, and deformed on each side thereof in order to immobilize it, in at least one region of its perimeter distinct from that in which the openings are formed.
REFERENCES:
patent: 5097900 (1992-03-01), Yamaguchi
patent: 5119552 (1992-06-01), Sutou et al.
patent: 5233756 (1993-08-01), Le Gauyer
patent: 5586600 (1996-12-01), Cribari
patent: 501444 (1992-02-01), None
Leo Leonard
Morgan & Finnegan , LLP
Valeo Thermique Moteur
LandOfFree
Method for fixing transverse partitions in the tubular fluid... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for fixing transverse partitions in the tubular fluid..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for fixing transverse partitions in the tubular fluid... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2585269