Air-to-air heat exchanger
An air-to-air heat exchanger is described comprising: an elongated box-shaped casing, made of heat-insulating material; glass tubes extending longitudinally within the casing and having opposite tapered ends; end chambers formed within the casing and in respective communication with the ends of the glass tubes and having first inlet and outlet ports for circulation of air through the glass tubes in a first air path; the end chambers each including a partition wall extending transversely of the casing and having through-bores with a tapered portion to receive and axially retain the tapered ends of the glass tubes; the casing having second inlet and outlet ports and baffles extending within the casing about a plane at right angle to that of the glass tubes for the circulation of air around the glass tubes in zig-zag manner in a second air flow path. The casing is made of two half-parts, each having a main wall and a skirt defined by two longitudinal side walls and two end walls with the skirt having a free edge, the free edges of the two casing half-parts adapted to contact each other, with the longitudinal side walls and the end walls matching in pairs. A tongue-and-groove arrangement is along the free edges to sealingly close the two casing half-parts. The inlet and outlet ports are of circular shape and defined by matching half-circular openings made in the end walls of two casing half parts.
- Assignee:
- NOV; NOV-87-055372; EDB-87-088812
- Patent Number(s):
- US 4653575
- OSTI ID:
- 6602803
- Resource Relation:
- Patent File Date: Filed date 3 Mar 1986
- Country of Publication:
- United States
- Language:
- English
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