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Heat transfer pipe for fin-and-tube type heat exchanger, and fin-and-tube type heat exchanger

A technology of finned tube type and heat exchanger, which is applied in the direction of indirect heat exchanger, heat exchanger type, evaporator/condenser, etc., can solve the problem of triangular heat transfer tube thermal conductivity without any research, and it is difficult to form the target triangular shape Holes, metal flow, etc., to achieve the effect of lightweight manufacturing cost, increased area, and improved thermal conductivity

Inactive Publication Date: 2015-02-25
FURUKAWA SKY ALUMINUM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

That is, there is no research on the specific shape of the triangle, the thermal conductivity of the heat transfer tube
In addition, when the holes formed in the flat porous tube are formed into triangular shapes by extrusion, there is a problem that the metal flow during extrusion is not smooth and it is difficult to form the holes of the target triangular shape.

Method used

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  • Heat transfer pipe for fin-and-tube type heat exchanger, and fin-and-tube type heat exchanger
  • Heat transfer pipe for fin-and-tube type heat exchanger, and fin-and-tube type heat exchanger
  • Heat transfer pipe for fin-and-tube type heat exchanger, and fin-and-tube type heat exchanger

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Embodiment

[0050] Hereinafter, representative examples of the present invention will be shown to clarify the present invention more specifically, but the present invention is of course not limited in any way by the description of such examples.

[0051] First, as a heat transfer tube for a finned tube heat exchanger according to the present invention, an aluminum alloy (Japanese Industrial Standard JISA3003) is extruded to prepare the following: Figure 5 An extruded flat porous tube 40 having a cross-sectional shape as shown in (a) with a width W of 16 mm, a thickness H of 1.9 mm, and a number of holes of 12 was used as heat transfer tube No. 1. The shape of the 12 holes 42 provided in this heat transfer tube No. 1 is an isosceles trapezoid with an upper base a of 0.6 mm, a lower base b of 1.2 mm, and a height h of 1.2 mm (0.63 times the thickness of the heat transfer tube). . In addition, various parameters such as the hydraulic diameter are shown in Table 1 below. In addition, in th...

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Abstract

Provided are a heat transfer pipe for a fin-and-tube type heat exchanger and a fin-and-tube type heat exchanger using this heat transfer pipe, with which the refrigerant-side heat transfer efficiency can be improved effectively. Trapezoidal holes (20), which are formed in flat multi-hole tubes (14) comprising aluminum or an alloy thereof, are formed such that the length of the upper base is ½ or less than the length of the lower base, the height of the hole is 0.5-0.8 times the thickness of the heat transfer pipe, and the ratio (D / h) of the hydraulic diameter D and the hole height h is in a range of 0.40-0.85, with the hydraulic diameter defined by dividing four times the cross-sectional area of the hole by the sum of the lengths of the sides of the hole. Flat multi-hole tubes (14) of this type are assembled together with fins (12) comprising aluminum or an alloy thereof to form a fin-and-tube type heat exchanger (10).

Description

technical field [0001] The present invention relates to a heat transfer tube for a fin-tube heat exchanger and a fin-tube heat exchanger using the heat transfer tube for a fin-tube heat exchanger, and particularly relates to a heat transfer tube suitable for use in household air conditioners, box-type air conditioners, etc. A heat transfer tube of a finned tube heat exchanger in an air conditioner and a finned tube heat exchanger using the heat transfer tube. Background technique [0002] Conventionally, in addition to using heat exchangers that work as evaporators or condensers in air-conditioning equipment such as household air conditioners, car air conditioners, and box-type air conditioners, they are also used as evaporators or condensers in refrigerators, heat pump water heaters, etc. Among heat exchangers that work, a finned tube heat exchanger having a structure in which fins are attached to heat transfer tubes is most commonly used in domestic indoor air conditioners...

Claims

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Application Information

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IPC IPC(8): F28F1/40F25B39/00F28F1/02
CPCF28F1/32F28D1/05391F25B39/00F28F1/022
Inventor 柿山史郎笹崎幹根
Owner FURUKAWA SKY ALUMINUM CORP
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