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

Inner-fin for heat exchanger flat tubes and evaporator

A technology of heat sinks and flat tubes, which is used in heat exchanger fixing, heat exchange equipment, evaporators/condensers, etc. The effect of heat transfer efficiency

Inactive Publication Date: 2006-11-15
KEIHIN THERMAL TECH CORP
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It has also been found that further narrowing of the fin pitch does not result in a corresponding improvement

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
  • Inner-fin for heat exchanger flat tubes and evaporator
  • Inner-fin for heat exchanger flat tubes and evaporator
  • Inner-fin for heat exchanger flat tubes and evaporator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0023] figure 1 4 to 4 show an embodiment of the present invention. The illustrated exemplary embodiment is suitable for use in a laminar evaporator for a motor vehicle air conditioner.

[0024] figure 1 The entire laminar evaporator for a motor vehicle air conditioner is shown. The evaporator 1 has an evaporator core 10 comprising a plurality of tubes 2, 2A interconnected by external fins 3, and each shell comprises a pair of tubes facing each other and connected together. Disc-shaped plate 20, 20A. The evaporator core 10 includes: a plurality of front tubular portions 22A arranged side by side in the transverse direction; a plurality of rear flat tubular portions 22A arranged side by side in the transverse direction; The front upper water storage chamber 22B and the front lower water storage chamber 22B connected to each other with the lower end; The lower reservoir 22B, these elements are formed by the pipe 2 instead of the pipe at the left end. The shell member 2A at...

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

PropertyMeasurementUnit
sizeaaaaaaaaaa
heightaaaaaaaaaa
Login to View More

Abstract

The invention relates to an inner fin (5) for a heat conductor flat tube (22A), comprising: a metal plate with a corrugated cross-section and enclosed in the flat tube (22A), all of the inner fin The ridge portion (51) and the groove portion (52) may be connected on the inner surface of the flat tube (22A) by brazing. At least one of the ridge portion (51) and the groove portion (52) of the inner fin (5) is provided with a turbulence promoting protrusion (53) facing a side opposite to a side to be brazed. The size of the turbulence-promoting protrusion (53) is such that the gap formed between the recessed portion (54) on the rear side of the protrusion and the inner surface of the flat tube (22A) is filled with the brazing material (6). The turbulence-promoting protrusions have a dimension of 1 to 1.5 mm along the longitudinal direction of the inner fin and a height of 0.2 mm to 0.4 mm. The protrusions (53) make the fluid flowing through the flat tubes (22A) flow in a more turbulent state, thereby improving the heat transfer efficiency.

Description

technical field [0001] The invention relates to inner fins for flat tubes of heat exchangers and to evaporators which are suitable, for example, as evaporators of motor vehicle air conditioners and which incorporate such inner fins. Background technique [0002] In evaporators for motor vehicle air conditioners, it has hitherto been the practice to arrange internal fins in the flat tubes in order to provide the refrigerant with an increased heat transfer area and thereby improve the performance. [0003] One such inner cooling fin is known which consists of a metal plate with a corrugated cross-section and is enclosed in a flat tube. All ridges and grooves on the inner fins are brazed to the inner surface of the flat tube. [0004] The internal heat spreader described provides an increased heat transfer area by reducing the spacing between the ridges and grooves (i.e., the fin pitch), which is encountered during fabrication with further reduced fin pitch difficulty. It ha...

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
Patent Type & Authority Patents(China)
IPC IPC(8): F28F3/06B23K1/00F25B39/02F28D1/03F28F3/02F28F3/08F28F13/12
CPCB23K1/0012B23K2101/14F28D1/0333F28D1/0341F28D2021/0085F28F3/025F28F2275/045F28F3/06
Inventor 东山直久塚原昌之
Owner KEIHIN THERMAL TECH CORP