Mesh fin type heat exchanger and method of making the same

Details Mesh fin type heat exchanger and method of making the same Mesh fin type heat exchanger and method of making the same

1994-03-01

1995-03-14

Flanigan, Allen J.

Heat exchange

Tubular structure

Projecting internal and external heat transfer means

165171, 165183, 29890046, F28F 144

Patent

active

053969499

DESCRIPTION:

BRIEF SUMMARY
FIELD OF THE INVENTION

The present invention relates to a mesh fin type heat exchanger including a multiplicity of heat transfer tubes arranged in parallel and a multiplicity of mesh-form fins arranged parallel to the axes of the heat transfer tubes and joined to the heat transfer tubes, and to a method of making the same.


BACKGROUND ART

Heat exchangers of a cross fin coil type have hitherto been widely used which has a multiplicity of heat transfer tubes arranged in parallel and a multiplicity of lamellar fins arranged orthogonally to the heat transfer tubes. In order to improve the heat transfer performance of heat exchangers of this type, it has been conventional to work the fins in various ways (as, for example, by providing notched and bent pieces of various configurations on the surfaces of the fins). However, such fin working have a limitation on the effectiveness for the improvement of the heat transfer performance.
Therefore, attempts have recently been made to develop heat exchangers having a new constructional arrangement which are known as mesh fin type heat exchangers (see, for example, Japanese Utility Model Application Laid-Open No. 61-192185).
A heat exchanger of the mesh fin type, as illustrated in FIGS. 10 and 11, comprises a multiplicity of heat transfer tubes 1, 1 . . . arranged in parallel, a multiplicity of mesh-form fins 2, 2 . . . arranged parallel to the axes of the heat transfer tubes 1, 1 . . . and joined to the outer peripheries of the heat transfer tubes 1, and tube plates 3 supporting the heat transfer tubes 1, 1 . . . at the ends thereof. The heat transfer tubes 1 and the mesh-form fins 2 are joined together usually by soldering or brazing after the mesh-form fins 2, 2 . . . are tightly held against the heat transfer tubes 1 from opposite sides thereof.
For the purpose of holding the mesh-form fins 2, 2 . . . against the heat transfer tubes 1, 1 . . . from opposite sides thereof as aforesaid, however, one problem is that the mesh-form fins 2, 2 be preformed at predetermined locations with grooves conforming to the outer peripheral surface of the heat transfer tubes 1. Another problem is that the process of placing mesh-form fins 2, 2 in superposed relation and fixing them together requires a high level of technical skill.


DISCLOSURE OF THE INVENTION

The present invention has been made in view of the above noted problems and it is an object of the invention to provide for improvement in the process of assembling heat transfer tubes and mesh-form fins together.
The mesh fin type heat exchanger according to claim 1 is a mesh fin type heat exchanger by comprising a plurality of heat transfer tubes arranged in parallel and a plurality of mesh-form fins arranged parallel to axes of the heat transfer tubes thereof and joined to the heat transfer tubes, characterized in that each of the heat transfer tubes consists of a pair of tube component members having a half cylindrical configuration, the tube component members having, at their respective circumferential ends, joint portions extending along the axis of the heat transfer tube, the opposed joint portions of the tube component members being joined together externally of the fins in such a way as to sandwich the fins between them.
The mesh fin type heat exchanger of claim 2 is characterized in that the fins are arranged so that a part of the fins extends through the heat transfer tube.
The mesh fin type heat exchanger of claim 3 is characterized in that portions of the fins which are located within the heat transfer tube comprise portions joined to the joint portion by being sandwiched between the joint portions, and portions projecting a predetermined length from the joined portions into the heat transfer tube in a flared fashion, there being no fin present in the middle of the heat transfer tube.
The mesh fin type heat exchanger of claim 4 is characterized in that two outermost ones of the fins sandwiched between the joint portions extend through the heat transfer tube, and in that portions present within the heat transfer

REFERENCES:
patent: 2107031 (1938-02-01), Evans
patent: 2112743 (1938-03-01), Poole
patent: 3409075 (1968-11-01), Long
patent: 3460613 (1969-08-01), Kritzer
patent: 4071935 (1978-02-01), Molitor

Affiliated with

Also associated with

Rating

Mesh fin type heat exchanger and method of making the same does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Mesh fin type heat exchanger and method of making the same, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Mesh fin type heat exchanger and method of making the same will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-708519