JPH018868Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a heat exchanger used as an evaporator in a car cooler, in particular a laminated heat exchanger.

BACKGROUND TECHNOLOGY A well-known laminated heat exchanger generally consists of a pair of press-formed metal plates and corrugated fins that are alternately laminated to form heat medium passages. to form a heat exchange part,
A tank portion is formed at both ends or one end to store a heat exchange medium, and has advantages such as being able to easily follow changes in load and having relatively excellent performance relative to volume. Therefore, when such a laminated heat exchanger is used as an evaporator for a car cooler, the heat exchanger medium passage is generally constituted by each pair of molded plates. A vertical heat exchanger with tube elements arranged vertically including
6847) is often used. The main reason for this is that by arranging the tube elements vertically, water droplets generated as condensation from the air flowing through the air circulation gap including the fins between them are quickly directed downward along the upper and lower tube elements. By being able to be excluded.

However, due to the structure of the car, for example, if the space to accommodate the evaporator is longer horizontally than vertically, or in other words, if it is longer horizontally, the heat exchanger may be of a vertical type. In some cases, using a horizontal type can provide a larger effective area for heat exchange, resulting in better efficiency.

Problems to be solved by the invention However, the horizontal type with tube elements arranged horizontally (for example,
When the condensed water adheres to the upper surface of the tube element, it is pushed to the leeward side by the urging force of the air flowing in the heat exchanger and concentrates on the edge of the tube element, and further There was a problem in that this water was easily blown away by the circulating air and flowed into the interior of the vehicle, a so-called water splash problem.

This idea was made in view of the above problems, and is particularly suitable for horizontal laminated type heat exchangers, which solves the problem of water splashing by making it possible to quickly discharge the condensed water on the top surface of the tube element to the outside of the heat exchanger. The purpose is to provide a heat exchanger.

Means for Solving the Problems In order to achieve the above-mentioned purpose, this invention consists of a plurality of plate-shaped tube elements and corrugated fins stacked alternately and in the vertical direction, so that the heat exchange medium flowing through the plate-shaped tube element and the corrugated fins are In a laminated heat exchanger configured to exchange heat with air flowing between tube elements, a condensed water collection groove is formed at the peripheral edge of the plate-shaped tube element, and a condensed water collection groove The gist of the present invention is a stacked heat exchanger characterized in that the groove width in the air flow direction is set relatively larger on the air outflow side than on the air inflow side.

Embodiments Hereinafter, the configuration of this invention will be explained based on illustrated embodiments.

In the embodiment shown in FIGS. 1 to 4, 1
2 is a corrugated fin that is interposed between the adjacent tube elements 1 and 1 and is alternately laminated and joined together; 3 is arranged outside the outermost corrugated fin 2. These are the upper and lower side plates.

The tube element 1 has a flat heat exchange medium passage 1a in the middle part, and has tank parts 1b at both ends communicating with the passage 1a and having a relatively large bulging height, and has an adjacent tank part 1b. The tank portions 1b of the tube elements 1, 1 are integrally joined by brazing. Further, a concave condensed water collecting groove 4 having a predetermined depth is formed in the peripheral edge of the tube element 1. This condensation water collection groove 4
The groove width l 1 of the groove 4a on the inflow side and the groove width l ₂ of the groove 4b on the outflow side of the air flowing between the tube elements in the direction of the arrows in FIGS. 1 and ₃ are l ₂ > l ₁ is set to . And the groove part 4b on the air outflow side
A cutout 5 is formed at one end of the heat exchanger for quickly discharging collected condensed water to the outside of the heat exchanger. As mentioned above, the reason why the groove width of the condensed water collecting groove 4 is set relatively large on the air outflow side is as follows.
The following is true. That is, the condensed water adhering to the upper surface of the tube element is pushed toward the air outflow side by the force of air generated by forced airflow, and most of it falls into the outflow side groove 4b.
requires a large capacity to collect and collect condensed water. In addition, the heat exchange efficiency of the heat exchanger is required to be as high as possible, and especially in cases where installation space is limited due to the structure such as in automobiles, it is necessary to increase the outside diameter of the heat exchanger. It is desirable to increase the heat exchange efficiency as much as possible without increasing the heat exchange efficiency. Therefore, the width of the groove 4b on the air outflow side is made large to improve the ability to collect and receive condensed water, and the groove 4a on the air inflow side, where collecting and receiving ability is not required, is made small to improve the heat exchange medium. Passage 1
By widening the width of a as much as possible, the reduction in heat exchange efficiency due to the formation of the collecting and receiving grooves can be prevented as much as possible, thereby satisfying the above requirements.

The production of tube element 1 as described above is as follows:
Generally, two metal molded plates are press-formed, with the ends and middle portions having recesses of different depths, and the peripheral portions having opposite recesses of a predetermined depth and width, stacked face-to-face, and each plate is This is done by joining and integrating the top surface of the recess at the peripheral edge.

In this embodiment, a bulge 3 is formed at one end of the lower side plate 3 in the longitudinal direction by press working or the like.
a is formed, so that the tube element 1 and the corrugated fin 2 are arranged in an inclined state with the notch 5 located on the lower side. The purpose of slanting the tube element 1 is to concentrate the condensed water in the notch 5 and make it easier to drain it. Here, the amount of inclination of the tube element 1, that is, the amount of inclination α of the side plate 3, is desirably set to be equal to or less than the pitch between adjacent tube elements from the viewpoint of the volumetric efficiency of the heat exchanger, the amount of condensed water discharged, and the like. Furthermore, in this embodiment, the tank parts of adjacent tube elements 1 are joined and integrated with each other in a state where they are slightly shifted in the longitudinal direction, so that the entire heat exchanger is shaped like a rectangular parallelepiped despite the inclination of the tube elements 1 themselves. It is made to ensure the shape. This is to eliminate the dead space that occurs when the entire heat exchanger is tilted when installed in an automobile, etc., and to make maximum use of the narrow air space.

The corrugated fin 2 is generally made of aluminum, preferably formed by cutting and raising louvers.

In addition, 6 and 7 in FIG. 1 are a heat exchange medium inlet pipe and an outlet pipe connected to the tank portion of the uppermost tube element 1. Further, 8 in FIG. 2 is an inner fin provided within the heat exchange medium passage 1a.

In the heat exchanger of the illustrated embodiment, the condensed water generated from the circulating air during heat exchange is pushed to the leeward side along the upper surface of the tube element 1 by the biasing force of the air, and remains as it is in the condensed water collection groove 4. Because it flows into the water, it no longer accumulates at the edges as in the past.
In addition, the groove 4b on the air outflow side is replaced by the groove 4 on the inflow side.
By setting the value larger than a, it is possible to maintain the heat exchange efficiency as high as possible while ensuring sufficient condensed water collection and reception capacity, and even when the amount of dehumidification is large, condensation does not occur from the collection and reception groove 4b. There will be no situation where water overflows.

The condensed water that has flowed into the condensed water collecting groove 4 in this way is
Since the tube element 1 itself is inclined, the heat is concentrated in the notch 5 and is quickly discharged from the notch 5 to the outside of the heat exchanger.

In addition, in the illustrated embodiment, the tube element 1
In the above example, two molded plates are stacked together to form a molded plate, but instead of this, other forming methods can be used, for example, two aluminum plates are coated with an anti-bonding agent in a desired pattern and then stacked. A roll bond panel or the like obtained by crimping and expanding the non-crimped portion using fluid pressure may also be used.

Effects of the device As described above, this device forms a condensation water collection groove on the periphery of the tube element, so that the condensation water pushed toward the air outlet by the biasing force of the circulating air is removed, causing water splashing. It can be quickly stored in the collecting and receiving groove without being squeezed and discharged outside the heat exchanger. Furthermore, by setting the groove width of the condensed water collection groove to be larger on the air outflow side than on the air inflow side, it can be used even in cases where installation space for heat exchangers is limited, such as in automobiles. , while maintaining heat exchange efficiency as high as possible, it is possible to ensure sufficient condensed water collecting and receiving capacity, and therefore, regardless of the amount of dehumidification, condensed water can always be discharged reliably,
The occurrence of the water splash phenomenon can be avoided.

[Brief explanation of the drawing]

The drawings show an embodiment of this invention; Fig. 1 is an enlarged longitudinal sectional view seen from a direction perpendicular to the air circulation direction, Fig. 2 is a front view seen from the air circulation direction, and Fig. 3 is a tube element. FIG. 4 is a sectional view taken along the - line in FIG. 3. DESCRIPTION OF SYMBOLS 1...Tube element, 2...Corrugated fin, 4...Condensation water collection groove, 4a...Air inflow side groove part, 4b...Air outflow side groove part.

Claims (1)

[Scope of utility model registration request] Plate-shaped tube elements and corrugated fins are alternately stacked in multiple stages in the vertical direction so that heat exchange is performed between the heat exchange medium flowing within the plate-shaped tube elements and the air flowing between each tube element. In the laminated heat exchanger, a condensed water collecting groove is formed in the peripheral edge of the plate-shaped tube element, and the groove width in the air flow direction of the collecting groove is larger than that on the air inflow side. A laminated heat exchanger characterized by being relatively large on the outflow side.