Heat exchanger and plate assembly and method of manufacture

Patent · Tue Mar 17 04:00:00 EST 1987

OSTI ID:6611075

Hoeffken, R W

A heat exchanger assembly is described for a gas fired furnace and the like comprising: a heat exchanger unit including opposed clamshell sections joined to each other to form an enclosure defining a combustion chamber; an opening into the chamber delimited by a substantially continuous rim formed by wall portions of the opposed sections, the rim being delimited by means forming a shoulder extending in a radial direction internally around the opening in the heat exchanger unit; and a plate member having an opening therein corresponding to the opening in the heat exchanger unit and delimited by a seamless flange extending around the opening in the plate member. The flange is proportioned to fit within the opening in the heat exchanger unit. It extends into the chamber and is folded radially outwardly with respect to a central axis of the opening in the plate member into an expanded metal engagement with a backsurface of the means forming the shoulder in the heat exchanger unit to form a substantially rigid leakproof joint between the heat exchanger unit and the plate member. A method is described of securing a heat exchanger unit for a furnace to a plate member, comprising providing the heat exchanger unit as a relatively thin walled sheet metal structure defining a chamber for the flow of fluid to be in heat exchange relationship with the walls of the heat exchanger unit and, at least one opening into the chamber through a wall of the heat exchanger unit.

• Assignee: Snyder General Corp., Minneapolis, MN
• Patent Number(s): US 4649894
• OSTI ID: 6611075
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
421000* -- Engineering-- Combustion Systems
COMBUSTION CHAMBERS
CONTRACTION
DESIGN
ENERGY TRANSFER
EXPANSION
FLANGES
FLUIDS
FURNACES
GAS FURNACES
HEAT EXCHANGERS
HEAT TRANSFER
HEAT TRANSFER FLUIDS
MANUFACTURING
PLATES