JP2001147087A - Fin-tube type of heat exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fin-tube type of heat exchanger which enhances the heat exchange efficiency, by removing the dead water area. SOLUTION: This heat exchanger comprises a plurality of fins 1 in piles, a plurality of heat conductive pipes 2 orthogonal to these fins, and a coupling pipe 3 for coupling the open ends of these heat conductive pipes 2, and this can generate a vortex in the air which flows in and guide it leeward of the heat conductive pipe 2, and for removing a dead water region, by being constituted such that it is provided with upper and lower cut and erected pieces 6 in a pair opposed to upper and lower collar parts 5a at the center between the collar parts 5a on the first row positioned windward of the air current circulating between the fins 1, that it is provided with a plurality of cut and erected pieces 6a, 6b, 6c, 6d, 6a', 6b', 6c', and 6d', to surround those collar parts 5a from windward to leeward on one side each of the top and bottom of the collar part 5a, and that the angle of its cut and erected piece is made larger windward of the air current circulating between the fins and gradually smaller, the closer it approaches leeward.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fin tube type heat exchanger used for an air conditioner or the like, and more particularly, to a fin structure of the heat exchanger.

[0002]

2. Description of the Related Art As shown in FIG. 1, for example, a fin tube type heat exchanger includes a plurality of fins 1 stacked in parallel at a predetermined interval and a plurality of hairpin-shaped heat transfer tubes 2 perpendicular to the fins. And a connecting pipe 3 in which the open ends of the heat transfer pipes 2 are connected in order. The air flows from one side between the stacked fins to exchange heat with the refrigerant flowing in the heat transfer pipe 2. ing.

For example, as shown in FIG. 5, a plurality of assembling holes 5 having a cylindrical collar portion 5a for inserting the heat transfer tube (2) and expanding and fixing the fin 1 are provided in the fin 1 in a vertical direction. A plurality of slit-shaped cut-and-raised portions 7 are provided between the upper and lower collar portions 5a at intervals, and the rising surface 7a is formed along a substantially peripheral edge of the collar portion 5a to form a heat transfer tube (2). The air was also guided downwind to improve heat exchange efficiency.

[0004]

However, in the prior art as shown in FIG. 5, the flow of air into the leeward of the first row of collars 5a located on the windward side is small, and the dead water area 8 is formed. There was a problem that heat exchange was not sufficiently performed. Accordingly, an object of the present invention is to provide a fin tube type heat exchanger that solves this problem and improves heat exchange efficiency by eliminating dead water areas.

[0005]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and a plurality of collars are arranged in two rows in a staggered manner in a vertical direction on a plate surface, and are parallel at predetermined intervals. And a plurality of heat transfer tubes inserted into the collar portion so as to be orthogonal to the fins, and a connecting tube connecting the open ends of the heat transfer tubes. In the center between the collars in the first row located on the windward side of the circulating air flow, a pair of upper and lower cut-and-raised portions are provided facing the upper and lower collar portions, and the same color is applied from the windward side of the upper and lower sides of the collar portion to the leeward side. A plurality of cut-and-raised parts are provided to surround the part, and the angles of the plurality of cut-and-raised parts are
The airflow flowing between the fins is large on the windward side and is gradually reduced toward the leeward side.

Further, the maximum angle of the cut and raised is 90 °.
The configuration will be as follows.

Further, two cut-and-raised portions facing the upper and lower collar portions are provided in parallel at a predetermined interval between the collar portions in the second row of the fins.

Further, cut-and-raised portions facing the collar portion are provided on the leeward side of the collar portion in the second row of the fins, respectively.

Further, the cut-and-raised portion is formed in a rectangular shape.

[0010]

FIG. 1 is a block diagram showing an embodiment of the present invention.
This will be described with reference to FIG. FIG. 1 shows a basic configuration of a heat exchanger used for an air conditioner or the like.
1 is a plurality of fins stacked in parallel at a predetermined interval, 2 is a plurality of hairpin-shaped heat transfer tubes orthogonal to the fins 1,
3 is a connecting pipe which connects the open ends of the heat transfer pipes 2 in order.
Are support plates provided on both sides of the stacked fin group.

FIG. 2 is an enlarged view of a part of the fin 1. The fin 1 has a plurality of mounting holes provided with a cylindrical collar portion 5a for inserting the heat transfer tube 2 and expanding and fixing the tube. 5 are provided in two rows at predetermined intervals in the up-down direction, and the collars 5a-5a in the first row located on the windward side of the air flow (white arrow) flowing between the stacked fins 1 are arranged vertically. A pair of upper and lower cut-and-raised portions 6 facing the collar portion 5a
And a plurality of cut-and-raised portions 6a, 6b, 6c, 6d, 6a ', 6b' to surround the collar portion 5a from the windward side of the upper and lower sides of the collar portion 5a to the leeward side.
6c 'and 6d' are provided.

The plurality of cut-and-raised portions 6a, 6a
As shown in FIG. 3, the angles of b, 6c, 6d, 6a ', 6b', 6c ', and 6d' are large on the windward side of the airflow flowing between the fins 1 and gradually increase toward the leeward side. For example, 6a and 6a 'are approximately 90 [deg.] Of the maximum angle, 6b and 6b' are approximately 70 [deg.], 6c and 6c '.
Is formed at approximately 50 °, and 6d and 6d ′ are formed at approximately 30 °.

In this embodiment, two cut-and-raised portions 6e and 6e 'facing the upper and lower collar portions 5a are provided in parallel between the second row of collar portions 5a and 5a at predetermined intervals. Has become.

With the fin 1 described above,
Since air can be guided to the lee of the collar portion 5a while generating a vortex on the periphery of the first-row collar portion 5a, the dead water area which has conventionally been a problem can be eliminated.

FIG. 4 shows a second embodiment.
The difference from the one described above is that the cut-and-raised portions 6 facing the collar portion 5a are located above and below the leeward side of the collar portion 5a in the second row.
f, 6f '. If the cut-and-raised portions 6f and 6f 'are provided at such positions, the heat exchange rate is improved to some extent.

[0016]

According to the heat exchanger using the fins as described above, air can be induced downwind of the collar portion while generating a vortex around the collar portion of the first row. The dead water area downwind of the collar part, which has been a problem with the product, is eliminated, and the heat exchange rate is improved.

[Brief description of the drawings]

FIG. 1 is a basic configuration diagram of a heat exchanger according to the present invention and a conventional example.

FIG. 2 is a front view of a main part showing a first form of the fin according to the present invention.

FIG. 3 is a perspective view of a main part showing a first form of the fin according to the present invention.

FIG. 4 is a main part front view showing a second form of the fin according to the present invention.

5 (A) is a front view of a main part of a fin, FIG. 5 (B) is a cross-sectional view of FIG.
(C) is a sectional view taken along the line BB of (A).

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Fin 1A fin 2 Heat transfer tube 3 Connecting tube 4 Support plate 5 Assembly hole 5a Collar part 6 Cut and raised 6a to 6f Cut and raised 6a 'to 6f' Cut and raised

Claims (5)

[Claims] A plurality of collars are arranged in two rows in a staggered manner in a vertical direction on a plate surface, and a plurality of fins stacked in parallel at a predetermined interval are provided on the collars so as to be orthogonal to the fins. A plurality of inserted heat transfer tubes and a connection tube connecting the open ends of the heat transfer tubes, and a central portion between the collars in the first row located on the windward side of the airflow flowing between the fins, In addition to providing a pair of upper and lower cut-and-raised portions facing the upper and lower collar portions, a plurality of cut-and-raised portions are provided so as to surround the same color portion from the windward side of one side of the upper and lower sides of the collar portion, and the plurality of cut-and-raised angles, A fin tube type heat exchanger characterized in that it is large on the windward side of the airflow flowing between the fins, and is gradually reduced toward the downstream side. 2. The fin tube type heat exchanger according to claim 1, wherein a maximum angle of the cut and raised is 90 °. 3. The fin tube type heat exchanger according to claim 1, wherein two cut-and-raised portions facing the upper and lower collar portions are provided at predetermined intervals in parallel between the collar portions in the second row of the fins. 4. The fin tube type heat exchanger according to claim 1, wherein cut-and-raised portions facing the collar portion are provided on the leeward side of the collar portion of the second row of fins, respectively. 5. The fin tube type heat exchanger according to claim 1, wherein the cut-and-raised portion is formed in a rectangular shape.