Heat exchanger fin and fin tube type heat exchanger

A technology of heat exchanger and finned tube, which is applied in the field of heat exchanger and its fins, can solve the problems that the thermal conductivity cannot reach the calculated value, and the undisclosed method of determining the three circular arcs, etc., so as to improve the heat transfer efficiency Effect
CN101509741AInactive Publication Date: 2009-08-19SHANGHAI JIAO TONG UNIV +1
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
SHANGHAI JIAO TONG UNIV
Publication Date
2009-08-19
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a heat exchanger fin and a fin tubular heat exchanger and belongs to the technical field of heat exchange. The heat exchanger fin comprises: a platy fin main part and an annular fin rolling ring provided with a through hole inside. The fin rolling ring extends towards the direction of the intersection with the fin main part and consists of a rolling ring root, a rolling ring middle part and a rolling ring bent end part. The rolling ring root is connected with the fin main part. The section of the fin rolling ring is shaped as a spline curve, a control point of the spline curve is an intermediate point of the rolling ring middle part, and the spline curve passes through the intermediate point of the rolling ring middle part, a first end point of the rolling ring middle part, a second end point of the rolling ring middle part, a specified point of the rolling ring bent end part and a specified point of the rolling ring root. As the section of the fin rolling ring is shaped as the spline curve, the clearance between the fin rolling ring and the outer surface of a heat transfer pipe can be the minimum, thus improving the heat transfer efficiency between the fin rolling ring and the outer surface of the heat transfer pipe.
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Description

technical field

[0001] The invention relates to a heat exchanger and its fins in the technical field of air conditioning, in particular to a heat exchanger fin and a fin-tube heat exchanger. Background technique

[0002] Among heat exchangers suitable for condensers or evaporators of air conditioners, there is a finned tube heat exchanger. like Figure 12 As shown, the existing fin-tube heat exchanger adopts fins 12' with an L-shaped cross-section, and the cross-section of the fin collar (fin collar) is designed as a straight line. The design envisages that after the collar of the fin 12' and the outer surface of the heat transfer tube 2' undergo the expansion bonding process, the straight part of the collar of the L-shaped fin 12' is in contact with the outer surface of the heat transfer tube 2' The parts fit together perfectly. However, after the collar is formed by expansion joint, due to the elastic-plastic coordination relationship between the fin-heat transfer tube a...

Claims

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