Method of assembling a heat exchanger including a method of determining values of parameters in a heat exchanger, and determining whether the efficiency of the heat exchanger is acceptable
AssigneeNippondenso Co., Ltd.
InventorsYoshio Suzuki, Michio Hiramatsu
Life of this patent
Estimating the term…
Abstract
A method of assembling a heat exchanger including a method of determining the parameters Pl, Pf, .beta., and .THETA. in a heat exchanger wherein Pl is the width of a louver formed in a fin of the heat exchanger, Pf is the fin pitch, .beta. is the tilt angle of the fin and .THETA. is the tilt angle of the louver. The values of these parameters are determined so as to satisfy the expression ##EQU1## When the expression is satisfied, the efficiency of the heat exchanger is acceptable.
Claims8
Method of forming parts for a heat exchanger, comprising the steps of:
- selecting values for each of parameters Pl, Pf, .beta., .THETA., in a heat exchanger wherein Pl is a width of a louver formed in a fin of the heat exchanger, Pf is a fin pitch of a fin of the heat exchanger, .beta. is a tilt angle of the fin of the heat exchanger and .THETA. is a tilt angle of a louver formed in the fin of the heat exchanger;
- changing said values until satisfying the expression ##EQU38## and forming at least said louver and said fin using the changed values of Pl, Pf, .beta. and .THETA..
A method of assembling a heat exchanger comprising the steps of:
- determining values of parameters Pl, Pf, .beta., .THETA. in a heat exchanger wherein Pl is the width of a louver formed in a fin of the heat exchanger, Pf is the fin pitch, .beta. is a fin tilt angle and .THETA. is a tilt angle of the louver formed in the fin of the heat exchanger, including selecting values of said parameters to satisfy the expression ##EQU39## preparing a plurality of the tubes each of which has a through hole through which a heat exchange medium flows,
- preparing a plurality of fins each of which has a plurality of louvers having a width of said determined value Pl and a tilt angle of said determined value .THETA.,
- assembling the tubes and the fins with said determined values of fin pitch Pf, and fin tilt angle .beta., and
- providing a pair of core plates at both end portions of the tubes so that the through hole of the tube opens to the core plate.
A method of forming parts for a heat exchanger, including determining parameters of fins which are for use between pairs of adjacent tubes in a heat exchanger in such a manner that each of the fins is separated from an adjacent fin by a predetermined fin pitch (Pf) and a base portion of the fin is inclined by a predetermined angle (.beta.) relative to air flow, including forming the fins with a plurality of louvers having a width (Pl) and a tilt angle (.THETA.) predetermined in such a manner that the fin pitch (Pf), the louver width (Pl), the louver tilt angle (.THETA.) and the fin tilt angle (.beta.) satisfies the expression ##EQU40##
Dependencies are inferred from the claim text.