Unlock instant, AI-driven research and patent intelligence for your innovation.

Two-piece header/manifold construction for a heat exchanger having flattened tubes

a heat exchanger and flattened tube technology, applied in the field of heat exchangers, can solve the problems of adding heat exchanger cost and challenging the design of header/manifolds

Inactive Publication Date: 2008-08-07
MODINE MFG CO
View PDF13 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These multiple header / manifolds and / or tube bends can add cost to the heat exchanger.
While PF designs such as described above are often used for condensers in conventional R134a refrigerant systems, it is challenging to design a header / manifold to accommodate wide microchannel extruded tubes while withstanding the high operating pressures required for CO2 or other transcritical refrigerant systems.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Two-piece header/manifold construction for a heat exchanger having flattened tubes
  • Two-piece header/manifold construction for a heat exchanger having flattened tubes
  • Two-piece header/manifold construction for a heat exchanger having flattened tubes

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0024]With reference to FIGS. 1 and 2, a PF type heat exchanger is shown in the form of a gas cooler 10 for use in a CO2 refrigeration system. The heat exchanger 10 includes a plurality of flattened, microchannel extruded tubes 12 extending parallel to each other between a pair of header / manifolds 14 (only one shown), with fins 16 extending between the tubes and a fluid connection 18 extending from the header / manifold 14. While the fins 16 are shown as plate fins, it should be understood that other types of fins such as serpentine or corrugated fins may be desirable in many applications. Similarly, while microchannel extruded tubes 12 are shown, other forms of flattened tubes may be desirable in some applications. Preferably, all of the components of the heat exchanger 10 are formed from a suitable material, such as aluminum, steel, or copper, and are bonded together such as by brazing, and preferably in a single braze operation.

[0025]The header / manifold 14 is a multi-piece construc...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A header / manifold construction (14) is adapted to receive a plurality of flattened tube ends (42) in a heat exchanger (10) having a plurality of flattened tubes (12). The header / manifold construction (14) includes first and second pieces (20, 22) extending along a longitudinal axis (24). The first piece (20) has a C-shaped transverse cross defined by an elongate opening (44) extending along the longitudinal axis (24), with a plurality of tube slots (40) spaced along the axis (24) opposite from the opening (44). The second piece (22) has a T-shaped transverse cross section with two side legs (48, 50) extending from opposite sides of a center leg (46), with the legs (46, 48, 50) being bonded to surfaces of the first piece (20).

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]Not Applicable.FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT[0002]Not Applicable.MICROFICHE / COPYRIGHT REFERENCE[0003]Not Applicable.FIELD OF THE INVENTION[0004]This invention relates to heat exchangers and more particularly to header / manifold constructions for heat exchangers having a core formed from flattened tubes, and in more particular applications such heat exchangers that are used in high pressure systems, such as CO2 refrigeration or air conditioning systems.BACKGROUND OF THE INVENTION[0005]There are many ways to design a heat exchanger such as a gas cooler or condenser for air conditioning systems for automotive or vehicular applications. The counter flow configuration or CF design relies on flowing refrigerant through multiple rows of tubes in a counterflow direction to the air flow passing through the core of the heat exchanger. Accordingly, the CF design requires tubes to be bent in a special manor or to use multiple header / mani...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): F28F9/02
CPCF28F9/0217F28D1/05391
Inventor HOEHNE, MARK R.JOHNSON, MARK W.PESKE, MICHAEL J.BRANDTNER, ROMANMOSER, JOHANNESPIRIBAUER, ROBERTSEITZ, GERLINDEHARTBERGER, DENISEVETTER, FRANK
Owner MODINE MFG CO