JPH09145284A - Heat-exchanger - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve productivity and to reduce a cost by a method wherein a fin of which a heat-exchanger is composed is made bendable without being cut, off in a heat-exchanger used as the indoor machine of an air-conditioner. SOLUTION: This heat-exchanger comprises fins 6 laminated at intervals of a given distance, a hair-pin-shaped refrigerant pipe crossing the laminated fins 6 at right angles, and a coupling pipe to couple together the refrigerant pipes, so that it may be bent in a two-way or a three-way after assembling. In this case, connecting parts 11 and 2 extending in a belt-like state in bending are provided beforehand on both sides of the bent part of the fin 6, so there is no need to separately cut off the fin 6 each time the fin is bent, productivity is improved, and a cost is reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat exchanger used for an indoor unit of an air conditioner, and more particularly to a structure of fins constituting the heat exchanger.

[0002]

2. Description of the Related Art An indoor unit of an air conditioner is constructed, for example, as shown in FIG. An inlet 2 for indoor air is provided on the front and upper portions of the housing 1, and an outlet 3 is provided on the lower front side. An air filter 5, a heat exchanger 6, and a blower (a cross-flow fan) for sending the air heat-exchanged by the heat exchanger 6 to the air outlet 4 in an air passage 4 connecting the suction port 2 and the air outlet 3. ) 7 is arranged, and the air outlet 3 is provided with a vertical wind direction plate 8 for vertically adjusting the blowing of air into the room. The heat exchanger 6 is formed in a substantially V shape in order to improve its performance and further reduce the size of the indoor unit itself, or is bent in three front and rear directions as illustrated. In order to make the heat exchanger 6 into such a shape, it is necessary to specially devise the fins and the fittings that constitute the heat exchanger 6. FIG. 4 shows the bent portion of the fin 20 constituting the heat exchanger 6 as a center, and an arc-shaped cut 22 centered on the insertion hole 21 for inserting the refrigerant pipe is provided on one side thereof. There is. After the other side is assembled as a heat exchanger in the state of being continuously connected, the position of the broken line 23 is cut off by a cutter, and the edges of the notches 22 are bent in a direction to bring them closer to each other, and heat exchange as shown in FIG. The container 6 is formed. An air shield is attached to the opening formed by bending to prevent the flow of air that is not heat-exchanged.

[0003]

By the way, the heat exchanger 6 thus obtained can make the indoor unit more compact, but some heat exchangers are required until the heat exchanger 6 is finished into a predetermined shape. There's a problem. That is, in the fin 20 shown in FIG. 4, the position of the broken line 23 must be cut off before it is bent into a predetermined shape, and the cutting requires special equipment such as a cutter, and the work is troublesome. There's a problem. Further, a wind shield is required at the bent portion in order to prevent the flow of air that is not heat-exchanged, resulting in a high cost. Therefore, an object of the present invention is to provide a heat exchanger that can be bent more easily without the need for equipment such as a cutter and a wind shield.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and includes fins laminated at a predetermined interval, a hairpin-shaped refrigerant pipe orthogonal to the laminated fins, and a refrigerant. In a heat exchanger, which is composed of a connecting pipe or the like for connecting pipes, and in which one side of the fin is bent at a predetermined angle with respect to the other side after assembly, an opening is provided at the center between both sides of the bent part of the fin. , Providing first and second cuts that are made close to each other from both ends of the bent portion toward the opening, and are arranged in parallel to both sides of the first and second cuts from the opening, and the tip thereof is provided. To make the third and fourth notches close to the side edges of the fins.

[0005]

With the above construction, both sides of the bent portion of the fin extend in a band shape when bent, so that the heat exchanger can be bent at a predetermined angle without disconnecting the fin one by one.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 shows a schematic configuration of an indoor unit of an air conditioner, but since the names of the respective parts and the like have been described in the section of the related art, description thereof will be omitted here. 2A, 2B, and 2C are heat exchangers 6 as shown in FIG.
It is shown by focusing on the bent portion of the fin 9 constituting the. The fin 9 is formed with a plurality of insertion holes 10 for inserting a refrigerant pipe and a plurality of louvers (cut and raised) not shown in the drawing. A non-hairpin-shaped refrigerant pipe is inserted and expanded, and the refrigerant pipes are connected to each other by a U-shaped connecting pipe (not shown) and bent, for example, as shown in FIG. It is characterized in that continuous portions 11 and 12 extending in a strip shape at the time of bending are provided on both sides of the bent portion.

The connecting portions 11 and 12 are provided with an opening 13 provided at the center between both sides of the bent portion of the fin 9 and a first notch 14 provided from both ends of the bent portion toward the opening 13. And the second notch 15 and the opening 13 so as to be parallel to both sides of the first notch 14 and the second notch 15.
Third notch 16 and fourth notch proximate the side edge of the
17, which are formed at the same time when the insertion hole 10 and the louver (not shown) are press-molded. When the heat exchanger 6 is bent at a predetermined angle, the continuous portions 11 and 12 of the fins 9 thus formed extend in a strip shape as shown in FIG. You can fold it without disconnecting it. The second cut 15 and the fourth cut 17 may be formed depending on the bending angle of the fin 9.
However, in such a case, it can be easily solved by providing a meandering continuous connecting portion 12 'as shown in FIG. 2B.

FIG. 2C shows another embodiment, in which one side of the fin 9 is centered on a center point 18 when the heat exchanger 6 (fin 9) is bent at a predetermined angle. A characteristic feature is that while the arc-shaped notch 19 having a width of several millimeters is provided, the notch 19 and the other side are provided with a continuous portion 12 extending in a belt shape when bent. The above-mentioned center point 18 is set at the center of the predetermined insertion hole 10. In addition, the connecting portion 12 is cut from the other end of the fin 9 as described above.
The second notch 15 provided toward the tip of 19 and the first notch
The notch 19 is formed in parallel with both ends of the second notch 15 from the tip end of the notch 19 and the tip thereof is brought close to the other side of the fin 9.

[0009]

According to the heat exchanger composed of the fins as described above, since the connecting portion formed on the fins extends in a belt shape as the heat exchanger is bent, the fins can be formed like the conventional products. Since it is not necessary to separate it one by one, equipment such as a cutter is not required, and the labor of separation is saved and the work efficiency is improved, while the airflow flowing to the bent part is suppressed by the continuous part, so it was used conventionally. Such a windshield is not necessary, and great effects such as cost reduction can be obtained.

[Brief description of the drawings]

FIG. 1 is a side sectional view showing a schematic configuration of an indoor unit according to the present invention and a conventional example.

FIG. 2 is a fin surface view of a heat exchanger showing an embodiment of the present invention.

FIG. 3 is a side view of an essential part of a heat exchanger formed according to the present invention.

FIG. 4 is a fin surface view of a heat exchanger showing a conventional example.

[Explanation of symbols]

 6 heat exchanger 9 fin 10 insertion hole 11 continuous part 12 continuous part 13 opening 14 first notch 15 second notch 16 third notch 17 fourth notch 18 center point 19 notch

Claims (7)

[Claims] 1. A fin comprising a plurality of fins laminated at a predetermined interval, a hairpin-shaped refrigerant pipe orthogonal to the laminated fins, and a connecting pipe connecting the refrigerant pipes to each other. In a heat exchanger that can be bent at a predetermined angle with respect to each other, an opening is provided in the center between both sides of the bent portion of the fin, and the first and second openings are made closer to each other from both ends of the bent portion. A second notch is provided, and third and fourth notches are provided in parallel on both sides of the first and second notches from the opening and the tips thereof are close to the side ends of the fins. A heat exchanger characterized by. 2. Fins stacked at a predetermined interval, hairpin-shaped refrigerant pipes orthogonal to the stacked fins, connecting pipes connecting the refrigerant pipes, etc., and one side of the fins faces the other side after assembly. On the other hand, in a heat exchanger that can be bent at a predetermined angle, one side of the fin that is the inner side at the time of bending is provided with an arc-shaped first cut centering on the center point when the fin is bent, while the other side A second notch is provided from the first notch toward the tip end of the first notch, and the tip end of the first notch is arranged parallel to both sides of the second notch, and the tip thereof is on the other side of the fin. A heat exchanger characterized in that a third cut is provided close to the heat exchanger. 3. The heat exchanger according to claim 1, wherein bent portions formed by the opening portion and the first, second, third, and fourth cuts are provided at a plurality of positions of the fin. 4. The heat exchanger according to claim 2, wherein bent portions formed by the arc-shaped first cut and the second and third cuts are provided at a plurality of positions of the fin. 5. The heat exchanger according to claim 1, wherein lengths of the opening and the first, second, third, and fourth cuts correspond to bending angles of the fins. 6. The heat exchanger according to claim 2, wherein the arc-shaped first cuts and the lengths of the second and third cuts correspond to bending angles of the fins. 7. The heat exchanger according to claim 2, wherein the center point is the center of an insertion hole into which the refrigerant pipe is inserted.