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Finned tube heat exchanger

A technology of heat exchangers and finned tubes, which is applied in the field of finned tube heat exchangers, and can solve problems such as limited application range

Active Publication Date: 2015-12-23
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technology described in Patent Document 1 assumes unbent fins (so-called flat fins), and its application range is not wide

Method used

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  • Finned tube heat exchanger
  • Finned tube heat exchanger
  • Finned tube heat exchanger

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Experimental program
Comparison scheme
Effect test

no. 1 approach

[0073] like figure 1 As shown, the finned tube heat exchanger 100 of this embodiment includes: a plurality of fins 31 arranged in parallel to form a flow path of air A (gas); and a heat transfer tube 21 penetrating through the fins 31 . The finned tube heat exchanger 100 exchanges heat between the medium B flowing inside the heat transfer tubes 21 and the air A flowing along the surfaces of the fins 31 . The medium B is, for example, a refrigerant such as carbon dioxide or hydrofluorocarbon. The heat transfer tube 21 may be connected to one or divided into a plurality.

[0074] The fin 31 has a leading edge 30a and a trailing edge 30b. The front edge 30a and the rear edge 30b are each linear. In this embodiment, the fins 31 have a bilaterally symmetrical structure with respect to the center of the heat transfer tube 21 . Therefore, when assembling the heat exchanger 100, there is no need to consider the direction of the fins 31.

[0075] In this specification, the direct...

no. 2 approach

[0110] like Figure 10A ~ Figure 10D As shown, the fin 31F of the second embodiment is a V-shaped corrugated fin formed so that the mountain portion 34 appears only at one position in the airflow direction. The fin 31F of this embodiment has the flat part 35, the 1st inclination part 38, the 2nd inclination part 39, and the slit 23 similarly to the fin 31 of 1st embodiment. The slit 23 is formed in the second inclined portion 39 and extends from the side of the through hole 37h toward the side of the mountain portion 34 . Specifically, the slit 23 extends from the flat portion 35 side toward the mountain portion 34 side. That is, the constituent elements of the fin 31F of the present embodiment are identical to those of the fin 31 of the first embodiment, as denoted by the same reference numerals, except for the point where the mountain portion 34 is formed at only one position in the airflow direction. The structural elements are the same. Therefore, as long as there is no...

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PUM

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Abstract

A fin tube heat exchanger (100) includes a plurality of fins (31) arranged in parallel and a heat transfer tube (21) configured to allow a medium to flow through the heat transfer tube to exchange heat with air. Each of the fins (31) is a corrugated fin formed to have a peak portion (34) at at least one position in an air flow direction, and has a tube surrounding portion (35 or 37) formed around the heat transfer tube (21), a first inclined portion (38) inclined with respect to the air flow direction to form the peak portion (34), a second inclined portion (39) connecting the tube surrounding portion (35) and the first inclined portion (38) to each other, and a slit (23) formed in the second inclined portion (39).

Description

technical field [0001] This invention relates to finned tube heat exchangers. Background technique [0002] The finned tube heat exchanger is composed of a plurality of fins arranged at predetermined intervals and a heat transfer tube passing through the plurality of fins. The air flows between the fins to exchange heat with the fluid in the heat transfer tubes. [0003] Figure 15 It is a top view of a fin used in a conventional finned tube heat exchanger. The fin 1 is shaped such that peaks 4 and valleys 6 alternately appear in the airflow direction. Such fins are often referred to as "corrugated fins". According to the corrugated fins, not only the effect of increasing the heat transfer area can be obtained, but also the effect of thinning the temperature boundary layer can be obtained by making the air flow 3 meander. [0004] As one technical problem common to finned tube heat exchangers, there is a problem related to drainage performance. When water (condensed wat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F28F1/32
CPCF28F1/325F28F17/005F28F2265/06F28F2265/22
Inventor 名越健二冈市敦雄本间雅也大坪周平长谷川宽谷口和宏横山昭一
Owner PANASONIC CORP