JP-2026074451-A - heat exchanger

Abstract

[Problem] To provide a heat exchanger capable of preventing water retention in the header tank of the heat exchanger and the resulting corrosion of the metal. [Solution] The heat exchanger 1 comprises a header tank 3 and a plurality of tubes 2. The header tank 3 includes a halved first tank member 31 and a second tank member 32. The first tank member 31 has a pair of first sides 31S extending in the longitudinal direction, and the second tank member 32 has a pair of second sides 32S extending in the longitudinal direction and a bottom surface 32B. The first tank member 31 and the second tank member 32 are positioned such that at least a portion of the pair of first sides 31S overlaps inside at least a portion of the pair of second sides 32S. In the region exposed to the outside of the second sides 32S, a thin-walled portion 325 is provided in at least a portion including the tip portion 323, which is thinner than the bottom surface 32B. [Selection Diagram] Figure 3

Inventors

• 中村 優一郎

Assignees

• サンデン株式会社

Dates

Publication Date

20260507

Application Date

20241021

Claims (6)

1. Header tank and A heat exchanger having multiple tubes, The header tank includes a first tank member and a second tank member, each being half-cut. The first tank member has a set of first sides extending in the longitudinal direction, The second tank member has a pair of second sides and a bottom surface that extend in the longitudinal direction. The first tank member and the second tank member are positioned facing each other such that at least a portion of the first side surface of the pair overlaps the inside of at least a portion of the second side surface of the pair. In the region of the second side surface that is exposed to the outside, a thin-walled portion is provided in at least a part of it, including the tip located on the opposite side of the bottom surface, where the thickness of the plate is thinner than that of the bottom surface. A heat exchanger characterized by the following features.
2. Having other header tanks, The header tank is a tank located above when in use. The aforementioned other header tank is a tank located at the bottom when in use. The aforementioned first tank member is the tank member that is on the upper side when in use. The aforementioned second tank member is the tank member that is on the lower side when in use. A heat exchanger as described in feature 1.
3. The thin-walled portion is provided on a part of the second side surface in the longitudinal direction. The heat exchanger according to feature 1.
4. At least a portion of the end edge extending in the longitudinal direction of the second side surface is provided with an end edge inclined portion that slopes downward toward the thin-walled portion. The heat exchanger according to feature 3.
5. The thin-walled portion has an inclined surface where the plate thickness decreases from the bottom side toward the first tank member side. The heat exchanger according to feature 1.
6. The second side surface is configured with a stepped shape, The thin-walled portion is the upper step of the stepped shape. The heat exchanger according to feature 1.

Description

This invention relates to a heat exchanger. Conventionally, vehicle air conditioning systems utilizing a heat pump cycle employ multiple heat exchangers in the refrigerant circuit. These multiple heat exchangers include, for example, heat exchangers located within an HVAC (Heating, Ventilating, and Air Conditioning) unit with an airflow passage through which cabin air flows, and heat exchangers located outside the cabin (outdoor heat exchangers). Outdoor heat exchangers, for example, may have multiple parallel tubes and tanks connected to both ends (upper and lower ends), functioning as radiators during cooling and as heat absorbers during heating. The outdoor heat exchanger tank, for example, is constructed by aligning a first tank member and a second tank member, each shaped in a roughly concave form, so that their openings are closed. In this configuration, the tank may be assembled such that, during use, the side surface of the first tank member (which is the upper side) fits inside the side surface of the second tank member (which is the lower side) (see, for example, Patent Document 1). Japanese Patent Publication No. 2024-075919 This is an external perspective view of a heat exchanger according to an embodiment of the present invention.This is a perspective view showing a header tank according to an embodiment of the present invention.This is a cross-sectional view showing a header tank according to an embodiment of the present invention.A perspective view showing another example of a header tank according to an embodiment of the present invention.A perspective view showing another example of a header tank according to an embodiment of the present invention.A perspective view showing another example of a header tank according to an embodiment of the present invention.A perspective view showing another example of a header tank according to an embodiment of the present invention.A perspective view showing another example of a header tank according to an embodiment of the present invention.This is a cross-sectional view showing a portion of a conventional heat exchanger. The embodiments of the present invention will be described below with reference to the accompanying drawings. Figures 1 to 8 are examples of embodiments of the present invention. In the figures, parts denoted by the same reference numerals indicate parts or components with the same function, and redundant explanations in each figure will be omitted as appropriate. <Heat exchanger> Figure 1 is a schematic perspective view showing an example of a heat exchanger 1 of this embodiment. The heat exchanger 1 is used in the position shown in Figure 1. As shown in Figure 1, the heat exchanger 1 comprises a plurality of tubes 2 arranged in parallel and header tanks 3 and 4 connected to both ends of the plurality of tubes 2. Note that Figure 1 is a schematic diagram, and the header tanks 3 and 4 have the configuration shown in detail in Figures 2 and later. The heat exchanger 1 performs heat exchange between a heat transfer medium flowing through the tubes 2 via the header tanks 3 and 4 and a fluid (for example, air) passing between the plurality of tubes 2. In this embodiment, as an example, a heat transfer medium is used to flow through the tubes 2, but a refrigerant may also flow through them. In the illustrated example, tube 2 is a tubular body that extends in one direction and has a flattened shape along the direction (arrow Z) intersecting its extension direction (arrow X). Multiple tubes 2 are arranged in parallel at predetermined intervals in the direction (arrow Y) intersecting its extension direction, and the space between the multiple tubes 2 becomes the passage path for the fluid to be heat exchanged. The fluid to be heat exchanged flows in the direction of arrow Z, and heat exchange occurs with the heat transfer medium flowing inside the tubes 2 as it passes between them. Fins (e.g., corrugated fins), generally not shown, are provided in the space between the multiple tubes 2 to improve heat exchange efficiency. In the following explanation, the direction indicated by the arrow X in Figure 1 is referred to as the tube extension direction, the direction indicated by the arrow Y is referred to as the longitudinal direction (or simply the longitudinal direction) of the header tank, and the direction indicated by the arrow Z is referred to as the short direction (or simply the short direction) of the header tank. Furthermore, in the following explanation, the orientation of the heat exchanger 1 in operation as shown in Figure 1 will be used as the reference. That is, the upper part of Figure 1 will be defined as "up," and the lower part of Figure 1 will be defined as "down." Header tanks 3 and 4 are provided at both ends in the tube's extending direction (X-direction). Header tank 3 is the upper header tank, and header tank 4 is the lower header tank. The upper header tank 3 is formed by connecting, for example, the upper first tank membe