JPH0256589B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a heat exchanger such as the one used as an evaporator in a car cooler, in particular a heat exchanger in which a plurality of plate-shaped tube elements having heat exchange medium passages are connected to each other. The present invention relates to a horizontal laminated heat exchanger that is stacked one above the other with an air circulation gap that includes a fan.

BACKGROUND TECHNOLOGY As a typical example of this type of horizontal laminated heat exchanger that has been widely used in the past, as shown in FIG.
A plurality of plate-shaped tube elements 11 each having a tube element 1b are stacked vertically in a horizontal state, and a corrugated fin 12 is placed between each flat tube part 11a, 11a.
The heat exchange medium that flows through each of the plate-like tube elements 11, 11... through the inlet/outlet header pipes 13a, 13b which are interposed and connected to the tank parts 11b, 11b and between each of the flat parts 11a, 11a. There are known devices that perform a heat exchanger with air.

However, in the horizontal laminated heat exchanger as described above, moisture in the air condenses due to cooling, and condensed water adheres to the upper surface of the flat tube portion 11a of each plate tube element 11 as well as each corrugated tube element 11. By accumulating in the valley of Fin 12,
There was a problem that the heat exchange efficiency was greatly reduced.

Therefore, as a conventional means for discharging the condensed water to the outside of the heat exchanger, for example, a drainage groove is provided on the top surface of the plate-shaped tube element, or the entire heat exchanger is installed in an inclined shape so that the condensed water can easily flow down. Mikiakiaki
58-67282) have been proposed. However, in the former proposed method, since the condensed water is guided to the drainage groove exclusively by air flow, drainage is not performed smoothly and the effect of improving heat exchange efficiency is small. In addition, the latter proposed method requires additional equipment to fix the entire heat exchanger in an inclined state, and since it is in an inclined state, it places restrictions on the arrangement of other equipment around the heat exchanger. This becomes a big problem when maximizing the use of a narrow space in a car or the like, and it is also unsightly in terms of appearance.

Problems to be Solved by the Invention The present invention aims to solve the problem that the heat exchange rate decreases due to adhesion and accumulation of condensed water in a horizontal laminated heat exchanger, that is, to quickly remove the condensed water from the system. It is an object of the present invention to provide a heat exchanger that has a structure that can be discharged, has good heat exchange efficiency, does not impose restrictions on the arrangement of other equipment in the surrounding area, and is easy to assemble and manufacture.

Means for Solving the Problems In order to achieve the above-mentioned object, the present invention has a structure in which each plate-shaped tube element is arranged in a laminated state so that the flat tube portion is arranged in an inclined manner, so that condensed water can quickly form a system along this inclination. It is designed to be discharged outside.

That is, in the present invention, a plurality of plate-like tube elements each having a bulging tank section at both ends of a flat tube section are stacked vertically with the tank sections on both sides abutting each other, and there is a gap between each flat tube section. In a horizontal laminated heat exchanger in which fins are interposed and heat exchange is performed between a heat exchange medium flowing in the plate-shaped tube elements and air flowing between the respective flat tube parts, both sides of each of the plate-shaped tube elements The upper top surface of the tank part is highly inclined toward the air outflow side with respect to the flat tube section, and the lower top surface is conversely inclined highly toward the air inflow side. The gist of this is a horizontal laminated heat exchanger characterized by a pipe section that is highly inclined towards the air inflow side.

Embodiments Hereinafter, the present invention will be explained based on illustrated embodiments.

Note that the embodiment shows a case where the present invention is applied to an evaporator.

In FIGS. 1 to 5, reference numeral 1 denotes a plate-shaped tube element, which is provided with bulging tank portions 4, 4 at both ends of a flat tube portion 3 that accommodates an inner fin 2 therein, and the upper side of each tank portion 4. The top surface 4a is the flat tube part 3
The lower top surface 4b is tilted at the same angle as the upper top surface 4a so that the lower top surface 4b is higher toward the air inflow side, and the flat tube portion 3 Condensation water collecting grooves 5, 5 are provided at the front and rear edges of the holder. The inner fin 2 has a flow guide function for regulating the flow direction of the heat exchange medium within the flat tube portion 3, and a function for increasing the contact area with the heat exchange medium to improve heat exchange efficiency. Such a plate-shaped tube element 1
As shown in FIG. 1, upper and lower molded plates 1a, 1a are made of aluminum and have the same shape.
It is made into a hollow shape by brazing at the peripheral edge.

Thus, the heat exchanger is constructed by stacking a plurality of the plate-shaped tube elements 1 in a horizontal state so that the upper and lower top surfaces 4a and 4b of the tank parts 4 and 4 on both sides overlap each other. The tube elements 1 and 1 are connected through communication holes 6 and 6 formed in the upper and lower top surfaces 4a and 4b of the tank section 4, and a corrugated fin 7 is interposed between each flat tube section 3 and 3. It is arranged at a predetermined installation part with the front side being the inflow side of the air 8.

In the heat exchanger having such a configuration, the flat tube portion 3 of each plate-like tube element 1 has a slope corresponding to the degree of inclination set on the upper and lower top surfaces 4a, 4b of the tank portion 4 in the stacked state. As shown in Figure 6, the arrangement is highly inclined towards the air inflow side. Therefore,
In the process of heat exchange between the heat exchange medium flowing in each plate-shaped tube element 1 and the air 8 flowing between each flat tube section 3, water generated from the air 8 and condensed water are removed from the slope of each flat tube section 3. The condensed water moves from the windward side to the leeward side without accumulating under the influence of the air flow, flows into the leeward side condensed water collection groove 5, and quickly flows out of the heat exchanger through the corner notch 5a. Since the dew condensation water is discharged into the water, the deterioration in heat exchange efficiency due to the dew condensation water is significantly reduced.

Note that the degree of inclination of the flat tube 3 in each plate-like tube element 1, that is, the upper and lower top surfaces 4 of the tank portion 4
The degree of inclination set for a and 4b should normally be in the range of 3 to 30 degrees in order to facilitate the discharge of condensed water.

Further, in the above embodiment, the upper and lower molded plates 1a, 1 are used as the plate-like tube element 1.
In the above example, a is formed by brazing at the peripheral edge, but instead of this, other forming methods may be used, for example, two aluminum plates may be coated with an anti-crimping agent in a desired pattern and then overlapped and crimped. However, a roll bond panel or the like obtained by expanding the non-crimped portion using fluid pressure may also be used. In this roll bond panel, instead of using the inner fins 2, heat exchange medium passages in a predetermined pattern may be formed using the bulges.

Effects of the Invention In the horizontal laminated heat exchanger according to the present invention, each plate-like tube element stacked vertically in a horizontal state has a bulging tank portion at both ends of the flat tube portion, and the upper and lower top surfaces of the tank portion are Since the flat tube section is highly inclined in the opposite direction from the front to the rear, when the tank sections are stacked in contact with each other, each flat tube section slopes according to the degree of inclination set on the top and bottom surfaces of the tank section. By setting the higher side of this slope as the high air inflow side, the condensed water generated from the air is quickly discharged outside the heat exchanger without accumulating along the slope of each flat tube part. Decrease in heat exchange efficiency due to condensed water is significantly reduced. Moreover, according to this invention, simply by stacking the plate-like tube elements one above the other, the flat tube sections automatically become inclined, making it easy to assemble and produce the heat exchanger using the same means as conventional general-purpose ones. In addition, compared to the case where the entire heat exchanger is tilted like the proposed method mentioned above, there is no need for special accessory equipment to fix the heat exchanger in the tilted state, and the surrounding area Because it does not impose restrictions on the placement of other equipment,
It is most suitable for applications such as automobiles where it is necessary to make maximum use of a narrow space, and has the effect of providing a clean and good appearance.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view of the main parts of a horizontal laminated heat exchanger according to the present invention, FIG. 2 is a longitudinal cross-sectional view of the main parts, and FIG. 3 is a plan view of a molded plate constituting a plate-shaped tube element. Fig. 4 is a side view thereof, Fig. 5 is a sectional view taken along the line shown in Fig. 2, Fig. 6 is a schematic vertical sectional view of the entire heat exchanger, and Fig. 7 is a perspective view of a conventional horizontal laminated heat exchanger. It is. DESCRIPTION OF SYMBOLS 1... Plate tube element, 3... Flat tube part, 4... Tank part, 4a... Upper top surface, 4b...
...Lower top surface, 7...Corrugated fins (fins).

Claims (1)

[Claims] 1. A plurality of plate-shaped tube elements each having a bulging tank section at both ends of a flat tube section are stacked vertically with the tank sections on both sides abutting each other, and a fin is interposed between each flat tube section. , in a horizontal laminated heat exchanger configured to perform heat exchange between a heat exchange medium flowing in a plate-shaped tube element and air flowing between each of the flat tube parts, tanks on both sides of each of the plate-shaped tube elements; The upper top surface of the section is highly inclined toward the air outflow side with respect to the flat tube section, and the lower top surface is conversely inclined highly toward the air inflow side, and in the stacked state, each of the flat tube sections A horizontal laminated heat exchanger characterized by a high slope on the air inflow side.