JPH0311593Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention mainly relates to the core of an air conditioning heat exchanger, and particularly to one in which a portion of the core is curved.

[Prior art]

In order to promote heat exchange in a relatively narrow space, many outdoor units and the like of home air conditioners have a heat exchanger core with a partially bent part. Such a heat exchanger core is mainly formed of a plate fin type. Among them, a two-row type heat exchanger core as shown in FIG. 3 is also widely used because of the need to increase the output. That is, the first
A core 8 and a second core 9 are overlapped in the thickness direction, and a curved portion 1 is formed in a portion of each core. Then, the five ends of each tube are connected to each other, and the refrigerant is allowed to flow through the tube 5. Then, the fan 6 caused the air blower 7 to start up.

[Problem to be solved]

However, in such a heat exchanger core, the collapse of the fins concentrates particularly in the curved portion 1 of the second core 9, which has a small radius of curvature, impeding ventilation and heat dissipation of the curved portion 1. Moreover, even in the flat part of the heat exchanger core, the plate fins 2a and 2b of the first core 8 and the second core 9 are arranged randomly without being aligned with each other, as shown in FIG. Therefore, ventilation was also hindered in this area. This drawback also existed in the conventional core as shown in FIG.

[Means for solving problems]

Therefore, the present invention aims to eliminate the above-mentioned problems and provide a heat exchanger that can be easily mass-produced, and its configuration is as follows.

That is, in the heat exchanger core of the present invention, a plurality of plate fins are arranged in parallel to each other, and a tube is passed through each fin to form the heat exchanger core. A portion of the core surface is configured to be curved. Here, the features of this invention are as follows:
The width of the plate fins 2 at the curved portion 1 of the core is narrow, and the flat portion 3 of the core is configured to have a narrow width.
is composed of wide plate fins 4. A tube 5 passing through the narrow plate fin 2
The plate fins 4 are constructed so as to pass through the wide plate fins 4 as well.

[Effect]

Therefore, this heat exchanger core has front and rear plates 2a, like a conventional double-row core having a curved part.
2b, there is no mutual phase shift, and ventilation is improved. At the same time, since the curved portion 1 is formed of narrow plate fins 2, the fins are relatively less likely to collapse, and even in the curved portion 1, ventilation can be ensured and heat exchange can be promoted. Moreover, since the tubes 5 passing through the narrow plate fins 2 also pass through the wide plate fins 4, the heat exchanger core can be made compact and suitable for mass production.

〔Example〕

Next, embodiments of the present invention will be described based on the drawings.

FIG. 1 is a schematic perspective view showing an embodiment of the present invention. A curved portion 1 is formed at the left end of the heat exchanger core in this embodiment. And this curved part 1
And in the vicinity thereof, narrow plate fins 2 are arranged at high density. That is, the fin pitch is formed small. Further, the flat portion 3 connected thereto is provided with a wide plate fin 4 and has a larger fin pitch than the curved portion 1 portion. All tubes 5 passing through the curved part 1 also pass through the flat part 3. Further, a tube 5 that does not pass through the curved portion 1 is also inserted through the flat portion 3. Then, the ends of each tube 5 are connected to each other, and the flow path formed by the tube is formed to be folded back and bent. The curved portion 1 is assembled in a straight line as shown by the chain line in the manufacturing process, and then curved as shown by the solid line using an appropriate device. A fan 6 is disposed in the heat exchanger core thus formed according to FIG. 3. Then, the flat part 3 also becomes the curved part 1.
Almost even ventilation is ensured. because,
Although the plate fins 4 of the flat portion 3 are wide, the fin pitch is large. On the other hand, the plate fins 2 of the curved section 1 have a narrow width but also a narrow fin pitch, so as a result, the curved section 1 and the flat section 3
The ventilation resistances of both can be made almost equal.
Incidentally, instead of reducing the fin pitch of the curved portion 1, a louver or slit with high ventilation resistance may be formed on the outer surface of the plate fin 2.

[Effect of idea]

The plate fin type heat exchanger core of the present invention has the above configuration and has the following effects.

(1) This core has wide plate fins 4 arranged on its flat part 3 and narrow plate fins 2 arranged on its curved part 1, so when forming the curved part 1, The collapse of the fins can be minimized, and a heat exchanger core with good ventilation and heat dissipation can be provided.

(2) Furthermore, since the tubes 5 passing through the narrow plate fins 2 are formed so as to pass through the wide plate fins 4 as well, it is possible to provide a heat exchanger core with a simple structure and suitable for mass production.

(3) Also, since the thicker part of the core is formed by wide plate fins, this part has good ventilation. That is, the conventional curved wide core becomes a two-row core as shown in FIG. 2 or 3, and the plate fins 2a of the first core 8 and the plate fins 2b of the second core 9 are arranged as shown in FIG. Since the cores are not aligned with each other and are randomly arranged with different phases, there was a drawback that ventilation was hindered, but this core does not have this problem.

[Brief explanation of the drawing]

FIG. 1 is a schematic perspective view of the heat exchanger core of the present invention, and FIG. 2 is a plan view showing an example of a conventional heat exchanger core.
FIG. 3 is another plan view of the conventional embodiment, and FIG. 4 is an enlarged explanatory view of a portion of FIG. 3. 1...Curved part, 2...Plate fin, 3...
flat part, 4... plate fin, 5... tube, 6... fan, 7... ventilation, 8... first core, 9... second core.

Claims (1)

[Claims for Utility Model Registration] 1. A plate fin type heat exchanger in which a core is constituted by a large number of plate fins arranged parallel to each other and a tube passing through each of the fins, and a part of the core surface is curved. In the exchanger core, the curved part 1 of the core is constituted by a narrow plate fin 2, and the flat part 3 of the core is constituted by a wide plate fin 4, and the flat part 3 of the core is constituted by a wide plate fin 4. 2. A plate fin type heat exchanger core characterized in that the tube 5 passing through the plate fin 2 is formed so as to also pass through the wide plate fin 4. 2. The core according to claim 1, wherein the fin pitch of the narrow plate fins 2 is smaller than that of the wide plate fins 4. 3. A utility model registration claim, in which louvers or slits are formed in the plate fins 2 so that the fluid resistance per unit area of the narrow plate fins 2 is larger than that of the wide plate fins 4. The core described in item 1.