JPH0547954Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial application field This invention is a laminated heat exchanger used as an evaporator in a car cooler, in particular, a multilayer heat exchanger in which a plurality of plate-shaped tube elements forming a refrigerant passage are interconnected. This invention relates to a horizontal stacked heat exchanger that includes corrugated fins and is stacked one above the other with an air flow gap interposed therebetween.

Conventional technology Conventionally, in this type of stacked heat exchanger, a plurality of plate-shaped tube elements each having a bulging tank section at both ends of a flat tube section are stacked horizontally one above the other, and each flat tube element A heat exchanger core is formed by interposing corrugated fins between the tube sections, and the refrigerant flowing through each plate-shaped tube element through the inlet and outlet header tubes connected to the tank section is connected between each flat tube section. It is designed to act as a heat exchanger with the flowing air.

Problems to be Solved by the Invention However, in conventional stacked heat exchangers, the plate-like tube elements are arranged horizontally, so moisture condensed from the air during cooling is formed into water droplets or There is a problem in that water tends to adhere and remain on the surface of the tube element as a film, resulting in a decrease in heat exchange efficiency. Of course, it is desirable to remove the condensed water as quickly as possible, but in conventional heat exchangers, this removal is carried out exclusively by airflow from the inlet side to the outlet side, and then the condensed water is removed. Since the condensed water is merely allowed to drip from the edge on the outlet side, the requirement for rapid removal of condensed water cannot be fully satisfied.

Conventionally, in order to quickly remove condensed water, for example, drainage guide grooves are provided on the top surface of the tube element, or the entire heat exchanger is installed in an inclined manner so that condensed water can easily flow down. Proposals have been made to do so (Utility Model Application Publication No. 58-67282). However, when using the former method, since the condensed water is only guided to the drainage guide groove by airflow, it is insufficient to promote the discharge of condensed water, and only a slight improvement effect is achieved. I didn't get it. In addition, in the latter method, the installation space for other equipment in the surrounding area is also restricted due to the sloped state, and especially in the case of an evaporator for a car cooler, it is difficult to fit in a limited space. Since the casing installed in the casing is usually rectangular parallelepiped, it is difficult to fit inside the casing, and there is a drawback that it tends to create wasted space.

In order to solve the above-mentioned drawbacks, this invention has all plate-like tube elements inclined in one direction, which allows for smooth discharge of condensed water, while also making it possible to This was done with the aim of keeping the overall appearance of the device upright and minimizing the disadvantages in terms of installation space.

Means for Solving the Problems For the above-mentioned purpose, this invention provides a plate-like tube element 1 having bulging tank portions 4 at both ends of a flat tube portion 3, as shown in the attached drawings.
In a schematic stacked heat exchanger in which a plurality of layers and corrugated fins 2 are stacked in an alternating arrangement in the vertical direction, and upper and lower side plates are arranged outside the outermost corrugated fin, the tube element 1 is placed on a horizontal surface. tilted in one direction at a predetermined angle θ within the range of 1.5 to 3.0°, and so that all the upper and lower edges of the slope are located within a common vertical plane Y1 and Y2, respectively. For example, the upper side plate 5 is stacked with one end on the lower side in the inclination direction, and the lower side plate 6 is in the higher position in the inclination direction. By constantly bending one end of each side over the entire area in the direction perpendicular to the inclination direction, bulges 5a and 6a bulging upward and downward are formed, and the outer surface 5a of the bulge ', 6a' are slopes corresponding to the inclination angle of the tube element 1, so that
A feature of the heat exchanger is that the overall appearance of the heat exchanger is formed in a substantially upright shape.

Embodiments This invention will be explained below based on illustrated embodiments.

As understood from FIGS. 1 and 3, the core A of the heat exchanger is composed of ten or more flat tube elements 1 and a required number of corrugated fins 2 stacked alternately. has been done.

The tube element 1 is as shown in FIG.
It is made up of two molded plates 1a, 1a, and has bulging tank parts 4, 4 on both the upper and lower sides at both ends, and a refrigerant evaporation tank that communicates both tank parts between them. It has narrow passages, ie flat tube sections 3,3. Furthermore, in this embodiment, a condensed water collecting groove 8 is formed in the peripheral edge of the tube element 1, and a condensed water collecting groove 8 is formed on the outflow side of the external air flowing between the tube elements 1, 1 in the direction shown by the arrow W in FIG. A cutout 9 is formed in the groove at the lower end position of the groove, and the collected dew water is promptly discharged to the outside of the heat exchanger. The vertically adjacent tube elements 1, 1 communicate with each other via a plurality of communication holes 7 bored in the tank parts 4, 4, thereby forming a series of refrigerant passages. Note that 10 in Figure 1,
Reference numeral 11 indicates a refrigerant inlet pipe and an outlet pipe provided in the tank portions 4, 4 of the uppermost tube element 1.

In the heat exchanger core A, all of the plate-like tube elements 1 are arranged at predetermined angles within a plane orthogonal to the air flow direction, as is clear from FIGS. 1 and 3 to 4. It is arranged in an inclined state. This inclination is intended to promote drainage of condensed water, and its angle θ is set in a range of 1.5 to 3 degrees. The reason why the inclination angle θ is limited to the above range is that if it is less than 1.5°, the function of draining the condensed water cannot be effectively achieved. On the other hand, if it exceeds 3 degrees, the apparent overall appearance of the heat exchanger will be approximately upright, as described below, and the width of the heat exchanger as a whole will be excessively reduced, making it difficult to exchange heat. This is because the effective area of the heat exchanger decreases and the heat exchange efficiency decreases. Furthermore, in order to prevent the entire core A from becoming substantially obliquely inclined due to the above-mentioned inclination, each tube element 1 is
As shown in FIG. 4, the tube elements 1 are stacked in such a manner that they are gradually shifted from adjacent tube elements 1 in accordance with the above-mentioned inclination angle. Accordingly, the upper and lower edges of the tube element 1 in the inclination direction are respectively positioned within one common vertical plane Y1, Y2, so that neither of the circumferential surfaces of the core A is vertical and the entire core is in an upright state.
Note that instead of stacking the tube elements 1 one after another with their positions slightly shifted as in this embodiment,
For example, by changing the shape of the tank part 4 so that the top surface of the tube element 1 is horizontal when it is tilted, both ends of each tube element can be positioned in the same vertical plane in a stacked state. good.

On the other hand, side plates 5 and 6 are attached to both the upper and lower surfaces of the core A so as to cover the outermost corrugated fin 2. In addition, at one end in the longitudinal direction of these side plates 5 and 6, there is a bulge portion 5 that bulges upward and downward, respectively, by bending the outer side plate over the entire width direction.
a, 6a are formed. This bulge is formed at one end of the upper side plate 5 on the lower side in the inclined direction, and on the lower side plate 6 at one end on the higher side in the inclined direction. Moreover, each outer surface of these bulging portions 5a, 6a is connected to the tube element 1.
The slopes 5a' and 6a' correspond to the inclination angle θ of It is adapted to fit comfortably within the chamber or storage casing 12.

In the above embodiment, the upper and lower molded plates 1a, 1a are used as the plate-like tube element 1.
Although we have shown an example in which the aluminum plate is formed by brazing at the peripheral edge, it is also possible to use another method instead of this, for example, two aluminum plates are coated with an anti-crimping agent in the desired pattern, then stacked and crimped together. However, a roll bond panel or the like obtained by expanding the non-crimped portion using fluid pressure may also be used. Further, the direction of inclination of the tube element 1 is not limited to the illustrated embodiment, but may be inclined in the opposite direction to the embodiment, or even upwind of the direction of air flow. It may be inclined so that the sides are higher.

Effects of the invention In the above-mentioned heat exchanger according to this invention, all the tube elements are inclined in one direction, so that the condensed water that condenses from the air and adheres to the surface of the tube elements is It quickly flows down toward one end according to the above-mentioned inclination, collects at one end of the tube element, and is dripped and removed. Therefore, the condensed water remains attached to the surface of the tube element for a long time and does not impede heat exchange, thereby reducing the reduction in heat exchange efficiency due to the attachment of condensed water. Moreover, since the angle of inclination of the tube element is limited to a range of 1.5 to 3.0 degrees, the condensed water discharge function can be effectively achieved without reducing heat exchange efficiency due to excessive inclination of the tube element. In addition, although the tube element is inclined, its circumferential surfaces are all vertical, and the bulges of the upper and lower side plates give the overall appearance a substantially upright shape. Because of this, it fits well in the evaporator casing, which is usually made in the shape of a rectangular parallelepiped, and does not have the disadvantage of creating a large wasteful space in the casing, especially on the peripheral side. Therefore, compared to the conventional method of installing the entire heat exchanger in an inclined manner, the evaporator for a car cooler does not impose any harmful restrictions on the arrangement of other equipment around the heat exchanger. As such, it can be suitably used in applications where it is necessary to maximize the use of a relatively narrow space inside a vehicle and to install it stably. Moreover, since the bulge of the side plate is formed by permanently bending one end of the side plate in the direction of inclination over the entire area in the direction orthogonal to the direction of inclination, it is easy to form the bulge. In addition, the inclination angle of the outer surface of the bulge can be easily adjusted by simply changing the bending angle, and a side plate corresponding to the inclination angle of the tube element can be easily manufactured.

[Brief explanation of the drawing]

Fig. 1 is an overall front view of the laminated heat exchanger according to this invention, Fig. 2 is a perspective view showing a pair of molded plates and corrugated fins that constitute a tube element separated, and Fig. 3 4 is a schematic vertical cross-sectional view of a part of the core portion of the heat exchanger, and FIG. 5 is an explanatory diagram of the apparent overall appearance of the heat exchanger. 1...tube element, 2...corrugated fin, 3...flat tube section, 4...tank section.

Claims (1)

[Scope of utility model registration request] Plate-shaped tube elements with bulging tank parts at both ends of the flat tube part and corrugated fins are stacked in multiple stages in an alternating arrangement in the vertical direction, and upper and lower sides are arranged on the outside of the outermost corrugated fin. In a horizontal stacked heat exchanger in which plates are arranged, the tube elements are inclined in one direction at a predetermined angle within the range of 1.5 to 3.0 degrees with respect to the horizontal plane, and both ends of all tube elements in the direction of inclination are The upper side plate has one end on the lower side in the inclined direction, and the lower side plate has one end on the higher side in the inclined direction. By constantly bending the entire portion in the direction orthogonal to the inclination direction, a bulge that bulges upward and downward is formed, and the outer surface of this bulge matches the inclination angle of the tube element. A horizontal stacked heat exchanger characterized in that the overall appearance of the heat exchanger is formed into a substantially upright shape by forming corresponding slopes.