JPH0640681U - Stacked heat exchanger - Google Patents

Abstract

(57) [Summary] [Purpose] A simple structure prevents the fins from falling off and prevents the flat tube from slipping sideways before brazing. [Structure] The flat tube 10 includes two core plates 10a and 1a.
It is formed by brazing 0b at the peripheral portion. A notch 11 is formed at the other edge of each core plate 10a, 10b.
a, 11b and standing pieces 12a, 12b are formed. The standing pieces 12a and 12b formed on one core plate 10a or 10b engage with the cutout portions 11b and 11a formed on the other core plate 10b or 10a, respectively, and are adjacent to each other beyond the cutout portions 11b and 11a. It projects between the flat tubes 10, 10. This prevents the core plates 10a and 10b from being displaced in the width direction and the fin 2 from falling off.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a laminated heat exchanger such as a condenser used in a vehicle air conditioner.

[0002]

[Prior art]

 Conventionally, as a laminated heat exchanger, as shown in FIG. 4, there is a laminated heat exchanger in which flat tubes 1 and fins 2 are alternately laminated. The flat tube 1 is formed by brazing two core plates 3, 3 at their peripheral edges. One end side of the core plates 3 and 3 bulges outward to form a tank portion 4. As shown in FIG. 5, both tank parts 4 are communicated with each other via a U-shaped passage formed by a partition wall 5. On the other hand, on the other end side of the core plates 3 and 3, the center of the edge is bent and bent at a substantially right angle to form a standing piece 6, as shown in FIG. As shown in FIG. 6, the standing piece 6 is in contact with one end of the fin 2 to prevent the fin 2 from falling out.

[0003]

[Problems to be solved by the device]

 However, in the above conventional laminated heat exchanger, the core plates 3, 3 may be displaced in the width direction before being brazed at their peripheral portions to form flat tubes, so that a jig is required and the cost is reduced. It depends. The present invention has been made in view of the above problems, and an object thereof is to provide a laminated heat exchanger capable of preventing the fins from falling off with a simple structure and preventing lateral displacement of the core plate before brazing.

[0004]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention is a laminated type heat exchanger in which two core plates are brazed at their peripheral portions and a flat tube having a tank portion formed only on one end side and fins are alternately laminated. In the exchanger, a cutout portion and an upright piece bent toward the opposite core plate side are formed at an edge of the core plate on the side opposite to the tank portion, and the upright piece of one core plate is It engages with the cutouts of the opposing core plates and projects between the flat tubes adjacent to each other beyond the cutouts.

[0005]

[Action]

 According to the above configuration, the upright piece formed on one core plate forming the flat tube engages with the notch formed on the opposing core plates to prevent the core plates from being displaced in the width direction. At the same time, it projects between adjacent flat tubes to prevent the fins from falling off.

[0006]

【Example】

 Next, an embodiment of the present invention will be described with reference to FIGS. FIG. 1 shows a laminated heat exchanger, which has a structure in which flat tubes 1 having a tank portion 4 only on one end side and fins 2 are alternately laminated, as in the conventional example. As shown in FIG. 2, the two core plates 10a and 10b forming the flat tube 1 are provided with notches 11a and 11b and upright pieces 12a and 12b at the edges on the side opposite to the tank portion 4, respectively. ing. The cutout portion 11a is provided outside the upright piece 12a, and the cutout portion 11b is provided inside the upright piece 12b. They are located symmetrically with respect to each other.

Therefore, when the core plates 10a and 10b are superposed on each other, as shown in FIG. The upright pieces 12a and 12b engage with the notches 11b and 11a of the core plate 10b, respectively. This prevents the core plates 10a and 10b from being displaced in the width direction. Further, since the rising piece 12 projects beyond the other core plate 10a or 10b and between the adjacent flat tubes 10 and 10, the end of the fin 2 comes into contact with the rising piece 12 to prevent the fin 2 from falling off. To be done.

[0008]

[Effect of device]

 As is clear from the above description, according to the laminated heat exchanger of the present invention, the notch portion and the standing piece are formed on the edge of the core plate constituting the flat tube on the side opposite to the tank portion, and the standing piece is formed. Since the one piece is engaged with the notch formed in the other core plate and is projected between the flat plate and the adjacent flat tube, the displacement between the core plates before brazing can be prevented. At the same time, it is possible to prevent the fins from falling off.

[Brief description of drawings]

FIG. 1 is a front view of a laminated heat exchanger according to an embodiment.

FIG. 2 is a partial perspective view of a core plate forming the flat tube of FIG.

FIG. 3 is a view showing an edge portion of the flat tube shown in FIG. 1 on the side opposite to the tank portion.

FIG. 4 is a partial cross-sectional front view of a laminated heat exchanger according to a conventional example.

5 is a plan view of a core plate forming the flat tube of FIG. 4. FIG.

FIG. 6 is a view showing an edge portion of the flat tube shown in FIG. 4 on the side opposite to the tank portion.

7 is a cross-sectional view taken along the line I-I of FIG.

[Explanation of symbols]

2 ... Fins, 10 ... Flat tubes, 10a, 10b ... Core plates, 11a, 11b ... Notches, 12a, 12b ... Standing pieces.

Claims (1)

[Scope of utility model registration request] 1. A laminated heat exchanger in which two core plates are brazed at their peripheral portions and a flat tube having a tank portion formed only on one end side and fins are alternately laminated,
A core plate in which a notch portion and an upright piece bent to the opposing core plate side are formed at an edge of the core plate on the side opposite to the tank portion, and the upright piece of one core plate opposes The laminated heat exchanger, characterized in that the laminated heat exchanger is engaged with the notch part and protrudes between the adjacent flat tubes beyond the notch part.