JP2007003115A5

JP2007003115A5 -

Info

Publication number: JP2007003115A5
Application number: JP2005184568A
Authority: JP
Filing date: 2005-06-24
Publication date: 2008-04-24
Anticipated expiration: 2025-06-24

Claims

A heat transfer tube that exchanges heat between inside and outside ,
And a plurality of fin structure having a plurality of fins in contact with the inner circumferential surface of the heat transfer tube arranged in the circumferential direction of the heat transfer tube,
The plurality of fins structures aligned in the axial direction to the heat transfer tube, and do not overlap when a plurality of fins of any fin structure viewed from a plurality of fins and axial other fin structure adjacent Arranged as
The axial length of the heat transfer tube of each fin is equal to or less than the run-up section distance X represented by the formula (1) or (2), where Re is the Reynolds number and D is the inner diameter of the heat transfer tube. A heat exchanger characterized by
In the case of Re <2300, X = 0.05 × Re × D (1)
In the case of Re> 2300, X = 10 × D (2)

A heat transfer tube that exchanges heat between inside and outside,
A plurality of fin structures having a plurality of fins in contact with the inner peripheral surface of the heat transfer tube side by side in the circumferential direction of the heat transfer tube;
The plurality of fin structures are arranged in the axial direction in the heat transfer tube, and the arrangement angle of the fins in the circumferential direction of the heat transfer tube is different between an arbitrary fin structure and another adjacent fin structure. Placed in
The axial length of the heat transfer tube of each fin is equal to or less than the run-up section distance X represented by the equation (1) or (2), where Re is the Reynolds number and D is the inner diameter of the heat transfer tube. A heat exchanger characterized by
In the case of Re <2300, X = 0.05 × Re × D (1)
In the case of Re> 2300, X = 10 × D (2)

Each fin structure
A first engagement portion formed at one end in the axial direction;
A second engagement portion formed on the other end in the axial direction and having a shape engageable with the first engagement portion;
The first and second engaging portions are formed by engaging one first engaging portion with the other second engaging portion in two fin structures. Item 3. The heat exchanger according to Item 1 or 2.

The heat exchanger according to claim 1 or 2, wherein the plurality of fin structures include at least two types of fin structures having different shapes.

The fin structure includes a boss having a central axis coinciding with the central axis of the heat transfer tube,
The fin is provided on the outer peripheral surface of the boss, has a fin surface substantially parallel to the axial direction of the heat transfer tube, and is formed in a shape curved with respect to the radial direction from the central axis of the heat transfer tube. The heat exchanger according to claim 1 or 2, characterized by the above.

The fin structure includes a boss having a central axis coinciding with the central axis of the heat transfer tube,
The heat exchanger according to claim 1 or 2, wherein the fin is formed in a circular tube shape provided on an outer peripheral surface of the boss and opening in an axial direction of the heat transfer tube.

The fin structure includes a regular polygonal column having a regular polygonal cross section having a central axis that coincides with the central axis of the heat transfer tube,
The fin has an outer peripheral surface in contact with one side surface of the regular polygonal column,
The heat exchanger according to claim 1 or 2, wherein each fin is disposed in a state of being sandwiched between other fins that are in contact with different side surfaces of the regular polygonal column.

It has an inner peripheral surface in contact with the fins of the heat transfer tube, a manufacturing method of a heat exchanger for exchanging heat between the outside of the heat transfer tube,
a process of forming axially elongated elongated structure having a fin selectively abuts the circumferential direction on the inner peripheral surface of a) the heat transfer tube,
b) When the long structure is cut in a direction orthogonal to the axial direction, the Reynolds number is Re, and the inner diameter of the heat transfer tube is D, the run represented by the formula (1) or (2) Producing a plurality of fin structures by cutting at intervals of a predetermined axial length equal to or less than the section distance X ;
c) A fin structure having an arbitrary arrangement angle of the fins in the circumferential direction of the heat transfer tube in a state where a plurality of fin structures are reversed front and back in the axial direction and the cut surfaces are engaged with each other. another method of manufacturing a heat exchanger, characterized in that the chromatic placing on differently the heat transfer tubes in the fin structure and the adjacent.
In the case of Re <2300, X = 0.05 × Re × D (1)
In the case of Re> 2300, X = 10 × D (2)

It has an inner peripheral surface in contact with the fins of the heat transfer tube, a manufacturing method of a heat exchanger for exchanging heat between the outside of the heat transfer tube,
a process of forming axially elongated elongated structure having a fin selectively abuts the circumferential direction on the inner peripheral surface of a) the heat transfer tube,
b) Assuming that each of the plurality of long structures is in different cutting directions at the same angle that is non-orthogonal with respect to the axial direction, the Reynolds number is Re, and the inner diameter of the heat transfer tube is D, formula (1) or ( 2) a step of producing a plurality of types of fin structures having different shapes by cutting at intervals of a predetermined axial length equal to or less than the approach section distance X represented by the formula ;
c) A fin structure having an arbitrary arrangement angle of the fins in the circumferential direction of the heat transfer tube in a state where the cut surfaces are engaged with each other so that different types of fin structures are adjacent to each other. method of manufacturing a heat exchanger, characterized in that the chromatic placing other adjacent fin structure in a different way the heat transfer tube.
In the case of Re <2300, X = 0.05 × Re × D (1)
In the case of Re> 2300, X = 10 × D (2)