JPS587159B2 - Heat exchanger - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a heat exchanger, particularly a heat exchanger used in a refrigerator evaporator, an oil cooler, an oxygen evaporator, an LNG vaporizer, a POS evaporator, etc. The object of the present invention is to provide a structure that has good heat exchange efficiency, excellent ventilation, and is lightweight.

This invention will be described below with reference to embodiments shown in the drawings.

In Figures 1 to 3, 1 is a flat heat exchange tube made of expanded aluminum material;
A large number of heat exchange tube sections 2 each having one refrigerant passage 3 and arranged in such a way that their bent portions 2a abut against each other, and a plate-like connection that connects adjacent heat exchange tube sections 2 at their respective bent portions 2a. 4, and has a large number of polygonal ventilation openings 5 when viewed from above.

Reference numeral 6 designates a large number of tongue-like fins that are integrally provided on one side of the heat exchange tube portion 2 by cutting in parallel in the tube axis direction.

The heat exchange tube 1 having such tongue-shaped fins 6 can be used, for example, as a flat one, or in a meanderingly bent state, or by stacking a required number of flat heat exchange tubes 1. Both ends of each stage are connected with U-shaped bent pipes, and in each case, a refrigerant supply header and a refrigerant discharge header (not shown) are appropriately attached to both ends of each heat exchange tube section 2 to obtain the required heat. An exchanger is configured.

Air is allowed to flow through such a heat exchanger, for example, in a direction perpendicular to the surface of the heat exchange tube 1.

Then, the air comes into contact with the tube wall of the heat exchange tube body 1 and the large number of tongue-like fins 6, and heat is exchanged between the air and the refrigerant in the refrigerant passage 3, and the air after heat exchange passes through the polygonal ventilation opening 5. It passes through and is discharged.

The heat exchange tube body 1 is manufactured, for example, in the following manner.

First, the material 11 of the heat exchange tube body 1 is constituted by an extruded aluminum material as shown in FIGS. 4 and 5, for example.

This heat exchange tube material 11 has refrigerant passage holes 13, respectively.
parallel flanges 12 and adjacent flanges 1
It is configured in a plate shape with a web 14 that connects the two together at the midpoint of their heights.

Next, a large number of slots 15 are inserted into each web 14 of the heat exchange tube material 11, as shown in FIG.
Open them in a staggered arrangement when viewed from the overall plane.

This slot 15 may be opened by a conventionally known method.

Next, on the fin upright surface 16 on one side of each flange 12 of the heat exchange tube material 11 with the slot 15 opened in this way,
As shown in FIG. 7, a large number of tongue-like fins 6 are provided in parallel in the width direction of each flange 12 by cutting.

Next, the heat exchange tube material 11 provided with such a large number of tongue-like fins 6 is stretched and expanded in its width direction.

As a result, each flange 12 is bent and deformed at both ends of each web 14 connecting the flanges 12 to each other, and as shown in FIG. A body 1 is formed.

In the above embodiment, the tongue-like fins 6 are provided on one side of each heat exchange tube section 2 of the heat exchange tube body 1, but they may be provided on both sides of each heat exchange tube section 2.

That is, in this case, first, the fin raised surfaces 26 are formed on both the upper and lower surfaces as shown in FIG. 8, and the refrigerant passage holes 2 are formed.
A heat exchange tube material 21 is prepared, which is made of an extruded material and is constituted by parallel flanges 22 having a plurality of parallel flanges 22 and webs 24 that interconnect these flanges 22 at the middle of their heights.

In the cutting process, this heat exchange tube material 21
As shown in FIGS. 9 and 10, a large number of tongue-like fins 6 are cut and formed on the fin upright surfaces 26 on both the upper and lower sides of each flange 22. As shown in FIGS.

By performing the other steps in exactly the same manner as in the above embodiment, a heat exchange tube body 1 having tongue-like fins 6 on both upper and lower sides of the heat exchange tube portion 2 is formed.

In addition to the above-mentioned extruded materials, the heat exchange tube materials 11 and 21 may be made by arranging a large number of straight heat exchange tubes in parallel, and by welding adjacent heat exchange tubes together, or by welding them together, or It is possible to use connectors connected in a staggered arrangement when viewed from above.

Furthermore, as the material for the heat exchange tube material 11.21, not only aluminum but also other metals that are relatively easily deformed plastically can be used.

As described above, the heat exchanger of the present invention has two bent portions
It is composed of a large number of corrugated heat exchange tube sections 2 arranged in such a way that their abuts abut each other, and a connecting section 4 that connects adjacent corrugated heat exchange tube sections 2 at respective bending sections 2a, and has a polygonal shape when viewed from the plane. It is composed of a heat exchange tube body 1 made of expanded metal material having a large number of ventilation openings 5 in the shape, and tongue-like fins 6 provided on at least one side of each heat exchange tube portion 2 of the heat exchange tube body 1. Since each heat exchange tube section 2 has a wave-shaped bent shape, the heat radiation area is increased compared to a conventional heat exchanger in which the heat exchange tube section is formed in a straight tube shape, and therefore the heat exchange efficiency is improved. It is excellent.

Moreover, since the heat exchange tube body 1 is made of an expanded material, it is lightweight, and since the ventilation openings 5 are widely opened in a polygonal shape when viewed from above, air circulation is very good.

[Brief explanation of the drawing]

Fig. 1 is a partial plan view showing an embodiment of the present invention, Fig. 2 is an enlarged sectional view taken along line 1--1 in Fig. 1, Fig. 3 is an enlarged sectional view taken along line 1-1 in Fig. 1, and Fig. 4. ~ Figures 7 sequentially show the manufacturing process of the heat exchanger of the present invention, Figure 4 is a partial plan view of the heat exchange tube material made of extruded material, and Figure 5 is a diagram taken along the line ■-■ in Figure 4. A partially omitted enlarged sectional view, FIG. 6 is a partial plan view of the heat exchange tube material after slotting, and FIG. 7 is a partial plan view of the heat exchange tube material after fin cutting. Figures 8 to 9 show modified examples; Figure 8 is a partially omitted cross-sectional view of the heat exchange tube material corresponding to Figure 5, and Figure 9 is a heat exchanger corresponding to Figure 2. FIG. 10 is a cross-sectional view of the heat exchange tube corresponding to FIG. 3. DESCRIPTION OF SYMBOLS 1... Heat exchange tube body, 2... Corrugated heat exchange tube part, 2a... Bent part thereof, 3... Refrigerant passage, 4... ... Connecting portion, 5 ... Polygonal ventilation opening, 6 ... Tongue-shaped fin.

Claims (1)

[Claims] 1 Consisting of a large number of corrugated heat exchange tube sections 2 arranged so that their bent portions 2a abut each other, and connecting portions 4 that connect adjacent corrugated heat exchange tube portions 2 at their respective bent portions 2a. Consisting of a heat exchange tube body 1 made of expanded metal material having a large number of polygonal ventilation openings 5 when viewed from above, and a large number of tongue-like fins 6 provided on at least one side of each heat exchange tube section 2 of the heat exchange tube body 1. heat exchanger.