JP-2026075809-A - heat exchanger

Abstract

[Problem] In a heat exchanger comprising multiple tubes, a pair of header tanks to which the tubes are connected, a partition section provided within the pair of header tanks, and a heat exchange core section, slit holes were formed in the header tanks and protrusions were formed in the partition section, and the two were fitted and assembled, then fixed by brazing. However, the fillets at the joints between the header tanks and the partition section had poor corrosion resistance, resulting in a shortened service life of the heat exchanger. [Solution] In the heat exchanger having a header tank equipped with a partition that divides the interior, the fitting hole provided in the header tank that fits with the fitting portion of the partition is shaped to bulge vertically upward. [Selection Diagram] Figure 8

Inventors

• 中村 優一郎

Assignees

• サンデン株式会社

Dates

Publication Date

20260511

Application Date

20241023

Claims (2)

1. Multiple tubes extending vertically through which a heat transfer medium flows, A pair of header tanks are provided at both ends of the tube in the extending direction into which the tube is inserted, In a heat exchanger comprising a heat exchange core section composed of the aforementioned plurality of tubes, The header tank is equipped with a partition section that divides the interior, The partition portion has a fitting portion that fits into a fitting hole formed in the header tank, A heat exchanger characterized in that the fitting hole has a shape that bulges vertically upward.
2. The header tank consists of an upper header tank and a lower header tank. The heat exchanger according to claim 1, characterized in that the fitting hole formed in the upper header tank bulges outwards from the inside to the outside of the upper header tank, and the fitting hole formed in the lower header tank bulges outwards from the outside to the inside of the lower header tank.

Description

This invention relates to a heat exchanger. For example, a heat exchanger used in vehicle air conditioners, for instance, is constructed from multiple tubes through which a heat transfer medium flows, arranged in a stack with heat transfer fins, and a header tank connected to the ends of these tubes and extending in the stacking direction. The header tank is equipped with a partition plate that divides its interior. This partition plate restricts the flow of the heat transfer medium within the header tank, ensuring uniform circulation of the heat transfer medium within each tube. The partition plate has a protruding portion, and a slit hole is formed on the upper surface of the header tank into which the protruding portion of the partition plate fits. This configuration allows for visual confirmation of whether the partition plate is properly brazed by inspecting the joint between the slit hole and the partition plate, thereby effectively preventing brazing defects in the partition plate (see, for example, Patent Document 1). Japanese Patent Publication No. 2004-205114 This is a front view showing the external appearance of a heat exchanger according to an embodiment of the present invention.This is a perspective view of the header tank of Example 1, showing the surface to which the tubes are connected as the bottom surface.This is a side view of the partition in Example 1.This is a top view of the header tank of Example 1, showing the side opposite to the side to which the tubes are connected.This is an enlarged perspective view of section C in Figure 4.This is a cross-sectional view taken along line A-A in Figure 4.This is an enlarged view of section D in Figure 6.This is a bottom view of the header tank of Example 1, showing the surface to which the tubes are connected.This is a side view of the bottom partition of Example 2.This is an enlarged view of section F in Figure 9.This is a bottom view of the header tank of Example 2, showing the side opposite to the side to which the tubes are connected.This is an enlarged perspective view of section G in Figure 11.This is a cross-sectional view taken along line B-B in Figure 11.This is an enlarged view of section H in Figure 13. Embodiments of the present invention will be described below with reference to the drawings. Each drawing shows one embodiment of the present invention and is not intended to limit the invention. In the following description, the same reference numerals in different drawings indicate parts with the same function, and redundant explanations in each drawing will be omitted as appropriate. In addition, the dimensional relationships of each element in the drawings are for the purpose of facilitating understanding and are not intended to limit the actual dimensional ratios. In the illustration, the Y direction represents the direction of airflow, the Z direction represents the vertically upward direction, and the X direction represents the direction of the thumb in a right-handed system, with the index finger pointing in the Y direction and the middle finger in the Z direction. Furthermore, the term "aluminum" includes not only pure aluminum but also aluminum alloys. Figure 1 shows an example of the schematic configuration of the heat exchanger 1 according to this embodiment. As shown in Figure 1, the heat exchanger 1 comprises a first header tank 11, a second header tank 12, and a heat exchange core 10 formed between the first header tank 11 and the second header tank 12. The heat exchange core 10 comprises a plurality of tubes 100, fins (not shown) provided between adjacent tubes 100, and a pair of side plates 101 provided at both ends in the arrangement direction of the plurality of tubes 100. In the heat exchanger 1, heat exchange occurs between a heat transfer medium (including a refrigerant) flowing vertically in the Z-direction (as shown in the figure) through the tubes 100 of the heat exchange core 10 via the first header tank 11 or the second header tank 12, and a fluid (e.g., air) passing through the heat exchange core 10 along the Y-direction (as shown in the figure). The first header tank 11 and the second header tank 12 are cylindrical members extending in the X direction shown in the figure. Multiple tubes 100 are arranged in parallel between the first header tank 11 and the second header tank 12 along this extending direction. Furthermore, the tubes 100 are arranged in two rows along the Y direction (direction of air passage) shown in the figure between the first header tank 11 and the second header tank 12. Each tube 100 extends along the Z direction shown in the figure, with one end of each tube 100 connected to the first header tank 11 and the other end connected to the second header tank 12. The first header tank 11 has multiple partitioned areas. Specifically, the interior of the first header tank 11 is divided into two areas: one corresponding to the tubes 100 arranged in one row of the heat exchange core 10 in the Y-d