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Louver Fin and Corrugation Cutter

Inactive Publication Date: 2008-07-31
CALSONIC KANSEI CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0009]To solve the above-described problem, it is desired to develop a louver fin having such a shape in which the fin does not curl after corrugation forming, and a corrugation cutter for forming such a louver fin without increasing the number of processes, and without decreasing material yields.

Problems solved by technology

For this reason, there has been the problem that material yields are decreased.

Method used

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  • Louver Fin and Corrugation Cutter
  • Louver Fin and Corrugation Cutter
  • Louver Fin and Corrugation Cutter

Examples

Experimental program
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Effect test

first embodiment

[0039]FIG. 5 is a perspective view showing part (corrugated shape for one crest) of a louver fin according to a first embodiment, and FIG. 6 is a cross-sectional view taken along line 6-6 of FIG. 5.

[0040]A louver fin 11 described in this embodiment has a continuous corrugated shape obtained by alternately forming bent portions 15 and flat portions 17 in a strip thin sheet 13 made of, for example, an aluminum member. In each flat portion 17, a plurality of louvers 18 or 19 cut and bent along the longitudinal direction Y of the strip thin sheet 13 are arranged parallel to each other along the width direction X of the strip thin sheet 13.

[0041]As shown in FIG. 6, these louvers 18 and 19 are formed so that the respective bending directions thereof are aligned with one direction. Further, the bending directions of the louvers 18 and 19 are approximately the same angle θ along the longitudinal direction Y of the strip thin sheet 13.

[0042]Here, a process for manufacturing the louver fin 11...

second embodiment

[0060]Next, a corrugation cutter according to a second embodiment of the present invention will be described.

[0061]As a technology relating to the machining of a corrugation cutter such as shown in the aforementioned first embodiment, a method is known in which an inclined edge surface of a cutter is ground at an angle so as to match the grinding surface of a grinding stone (see JPA 1-2833). However, in the machining method described in JPA 1-2833, since an inclined edge can be machined only at a constant edge angle, it is technically difficult to manufacture a corrugation cutter (gradual-change corrugation cutter) according to the aforementioned first embodiment in which an edge angle gradually changes. Further, a gradual-change corrugation cutter can be machined by machining an inclined edge by means other than a grinding process using a grinding stone, such as a cutting process or a discharge process. However, since a cutting process is inferior in the surface roughness of a mach...

third embodiment

[0087]Next, a corrugation cutter according to a third embodiment of the present invention will be described.

[0088]In the machining method described in the aforementioned JPA 1-2833, since an inclined edge can be machined only at a constant edge angle, it is technically difficult to manufacture a corrugation cutter (gradual-change corrugation cutter) according to the aforementioned first embodiment in which an edge angle gradually changes. Further, a gradual-change corrugation cutter can be machined by machining an inclined edge by means other than a grinding process using a grinding stone, such as a cutting process or a discharge process. However, since a cutting process is inferior in the surface roughness of a machined surface to a grinding process, fin shaping may be adversely affected. Further, a discharge process takes more machining time than a grinding process, and therefore causes an increase in cost.

[0089]In view of this, in the third embodiment, a corrugation cutter is pro...

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Abstract

A louver fin (11) has a corrugated shape by alternately forming bent portions (15) and flat portions (17) in a strip thin sheet (13). In the louver fin (11), a plurality of louvers (19, 21) cut and bent out of the flat portions (17) along the longitudinal direction Y of the strip thin sheet (13) are arranged parallel to each other along the width direction X of the strip thin sheet (13). In the louver fin (11) the louvers (18, 19) are cut and bent at an approximately same angle with respect to the longitudinal direction Y of the strip thin sheet (13).

Description

TECHNICAL FIELD [0001]The present invention relates to a radiating louver fin used in a heat exchanger, and a corrugation cutter for forming this louver fin.BACKGROUND ART [0002]In cooling devices and air conditioners mounted on vehicles such as automobiles, heat exchangers such as radiators, heater cores, condensers, and evaporators are used. These heat exchangers are configured to exchange with air via a corrugated fin that is formed in a corrugated shape. In recent years, in order to improve heat dissipation performance, a corrugated fin with louvers (hereinafter referred to as a louver fin) has been developed, in which a plurality of louvers that are obliquely open in flat portions (sections between bent portions) of the fin are formed.[0003]FIG. 1 is a perspective view showing the appearance of a typical louver fin. In a louver fin 1, a strip thin sheet 3 is formed in a corrugated shape so that bent portions 3a and flat portions 3b are alternately continued, and that a pluralit...

Claims

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Application Information

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IPC IPC(8): F28F3/02B21D13/08
CPCB21D13/04F28F1/128B21D31/046
Inventor YAEZAWA, HIROKAZUTOCHIGI, KENJI
Owner CALSONIC KANSEI CORP
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