JP3301961B2 - Heat exchanger - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a heat exchanger used for an air conditioner or the like.

[0002]

2. Description of the Related Art In an indoor unit as an indoor unit of an air conditioner, for example, a heat exchanger 1 as shown in FIG.
An outdoor unit as an outdoor unit is equipped with a heat exchanger 2 as shown in FIG. In each heat exchanger, a heat transfer tube 4 for passing a refrigerant is provided in a heat transfer fin body 3 in which a plurality of heat transfer fins are stacked at a predetermined fin pitch.

[0003] At present, the mainstream of a heat exchanger in which a circular heat transfer tube is disposed in a heat transfer fin body, is composed of two rows of heat transfer fin bodies. FIG. 2A is a cross-sectional view of the heat transfer fin body, and shows a surface view of the heat transfer fin. 3
Reference numerals a and 3b denote heat transfer fins constituting a heat exchanger, 4 denotes a heat transfer tube, and 5 denotes slit fins formed by cutting and raising on the surface of the heat transfer fins. I have.

[0004] The slit fins 5 shown in FIG. 2A are merely examples, and various shapes and arrangements of the slit fins 5 have been proposed and are not limited thereto. An example of another sequence is shown in FIG. FIG. 2B is a layout view of the slit fins on one row of the heat transfer fins.
Are heat transfer tubes, 5a, 5b, 5c, and 5d, each of which is a slit fin formed by cutting and raising the surface of the heat transfer fin with the same length, and is extruded in a rectangular shape in the front direction of the drawing.

The slit fins 5a and 5b are located in front of the heat transfer tube 4 with respect to the flow of air, and the slit fins 5c and 5d are located behind the heat transfer tube 4. Reference numeral 6 denotes a heat transfer tube 4 and a slit fin formed between the heat transfer tubes 4,
Similarly, it is formed by cutting and raising on the surface of the heat transfer fin,
It is extruded in a rectangular shape toward the front of the figure.

When air flows due to the intake in the direction of the arrow in the heat transfer fins arranged in FIG. 2B, as shown in the distribution curve of the velocity V, the central portion having a small number of slit fins has a low air resistance. Due to the small number, the wind speed becomes higher than the upper and lower positions, and the distribution of the air flow is also unevenly distributed in the central portion. For this reason, air was not uniformly contacted with the slit fins, so that the slit fins could not be effectively used, and the heat exchange action of the heat exchanger did not function sufficiently.

[0007]

SUMMARY OF THE INVENTION Accordingly, the present invention provides a heat exchanger in which the distribution of the air flow sucked into a heat exchanger and passing through the slit fins is made uniform so that contact with all the slit fins is sufficient. An object of the present invention is to provide a heat exchanger in which the heat transfer efficiency of the heat exchanger is high and the energy efficiency of the heat exchanger is improved.

[0008]

Means for Solving the Problems To achieve the above object, a heat exchanger according to claim 1 of the present invention has a heat transfer tube penetrating through heat transfer fins laminated at a predetermined fin pitch. In addition, among the slit fins formed on the heat transfer fin, the slit fin formed between the heat transfer tube and the heat transfer tube is straight without being divided, and is formed at the front and rear of the heat transfer tube, respectively. A plurality of rows of slit fins are arranged such that adjacent vertical and horizontal slit fins have different lengths from each other, and the plurality of rows of slit fins are arranged so that their division positions are shifted from each other, and the division position is a long slit. The fins were arranged so as to face almost the center of the fins.

[0009]

In this way, the distribution of the air flow through the slit fins is made uniform, and the contact with all the slit fins is made sufficient to increase the heat transfer efficiency of the heat exchanger.
Equipment energy efficiency is improved.

[0011]

FIG. 1 is an enlarged cross-sectional elevation view of a heat transfer fin of a heat exchanger according to the present invention. In the figure, the same components as those in FIG. 2 are denoted by the same reference numerals. 4 is a heat transfer tube,
Reference numerals 7 and 8 denote slit fins formed by being cut and raised on the surface of the heat transfer fins. The slit fins 7 are formed longer than the slit fins 8 and are extruded in a rectangular shape in the front direction in the drawing. .

The slit fins 7 and the slit fins 8 formed in a plurality of rows on the heat transfer fin at the front and rear positions of the heat transfer tube 4 are mutually adjacent in the vertical direction adjacent to each other at the front and rear positions of the heat transfer tube 4. The lengths of the slit fins are set to be different from each other, and are also set to be different from each other in the adjacent horizontal direction.
Are arranged to face almost the center of the camera. And two slit fins 6 which are formed between the heat transfer tubes 4 and which are straight without being divided are arranged adjacent to each other with the same length.

When the air flow due to the intake in the direction of the arrow is generated in the heat transfer fins in the arrangement of FIG. 1, the resistance of the air is made substantially uniform regardless of the number of slit fins as shown by the distribution curve of the velocity V. The difference between the wind speed at the center and the wind speed at positions above and below the center is not so large, and the distribution of the air flow is not unevenly distributed in the center. For this reason, air is uniformly contacted to all the slit fins and the slit fins are effectively used, so that the heat exchange action of the heat exchanger functions sufficiently.

[0014]

As described above, the heat exchanger of the present invention
By devising the arrangement of the slit fins, it is possible to avoid the formation of an air flow passage by the divided positions of the adjacent slit fin rows, and the distribution of the air flow that is sucked into the heat exchanger and passes through the slit fins is reduced. In a uniform manner, all the slit fins are sufficiently brought into contact with air to make effective use of the slit fins, so that the heat transfer efficiency of the heat exchanger is high and the energy efficiency of the equipment can be improved. .

[Brief description of the drawings]

FIG. 1 is a layout diagram of slit fins on a heat transfer fin of the present invention.

FIG. 2A is a view showing a state in which a heat transfer tube is disposed in a heat transfer fin body. (B) Layout diagram of slit fins on another conventional heat transfer fin.

FIG. 3 shows an indoor unit heat exchanger and an outdoor unit heat exchanger.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 indoor unit heat exchanger 2 outdoor unit heat exchanger 3 heat transfer fin body 4 heat transfer tube 5 slit fin 6 slit fin 7 long slit fin 8 short slit fin

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Masahiro Kobayashi 2-5-5 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (56) References JP-A-60-202295 (JP, A) Showa 64-54682 (JP, U) Actually open Showa 57-139086 (JP, U) Actually open Showa 62-29574 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) F28F 1 / 32 F24F 1/00

Claims (1)

(57) [Claims] A heat transfer tube is provided so as to penetrate a heat transfer fin body laminated at a predetermined fin pitch, and a slit fin formed on the heat transfer fin, between a heat transfer tube and a heat transfer tube. The slit fins formed straight are straight without being divided, and a plurality of rows of slit fins respectively formed in front and rear of the heat transfer tube have adjacent vertical and horizontal slit fins having different lengths. The heat exchanger, wherein the plurality of rows of slit fins are set so as to be shifted from each other in a dividing position, and the dividing position is arranged so as to face a substantially central position of the long slit fin.