JPH0530847Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to a heat exchanger for a combustor, and particularly relates to an improvement in the soldering structure between the heat absorption fin and the side plate.

[Conventional technology]

In the conventional heat exchanger of this type, as shown in FIG. 8, the heat absorbing fin 101 and the side plate 102 are soldered together, and notched grooves 1 are formed at the top of both sides of the heat absorbing fin 101.
04, and fill the brazing material 1 only in the notch groove 104.
03, and the fins and side plates are closely attached by furnace brazing.

[Means for solving ideas]

In the conventional technology, the heat absorbing fin and the side plate are brazed together at the top, but when examining the soldered joint surface, it is found that melted solder from the top enters between the fin and the side plate and approximately halfway between the fins, and the fins are brazed together. In many cases, there is a gap below the middle where the solder cannot fully enter, which causes poor thermal conductivity, low strength, and durability.

This idea solves the problems of the existing technology, and its purpose is to arrange the heat absorbing fin and side plate with brazing filler metal near the top and center of both sides, increasing the amount of brazing filler metal than before, and creating a heat absorbing fin. Make sure to fill the gaps between the side plates and between the heat absorption fins from the top to the bottom to ensure brazing and improve heat conduction.
The present invention also provides a heat exchanger with increased strength and improved durability.

[Means to solve the problem]

In order to achieve the above object, this invention is a heat exchanger in which side plates 2 are brazed on both sides of a large number of heat absorption fins 1 arranged in parallel, and the side plates 2 are divided into upper and lower parts,
The upper side plate 2a has a brazing material 3 on both sides of the heat-absorbing fin 1, and the side plate 2a and the fin 1 are brazed together, and the lower side plate 2b has a brazing material receiving piece 4 formed in an inclined shape at its upper end. A technical means in which a brazing material 3 is provided on the piece 4 to braze the side plate 2b and the fin 1; when the side plate 2 is not divided into upper and lower parts, a brazing material 3 is provided on both upper sides of the heat-absorbing fin 1;
And a brazing material receiving hole 5 is provided near the center on both sides,
The present invention relates to a technical means in which a brazing material 3 is provided in the brazing material receiving hole 5 so that the heat-absorbing fins and the side plates and the upper and lower parts of the heat-absorbing fins can be soldered using separate brazing materials.

[Effect]

According to the structure described above, when the endothermic fin and the side plate are soldered together, the brazing material provided on both sides of the upper part of the endothermic fin and the brazing material provided in the brazing material receiving piece 4 of the lower side plate or in the brazing material receiving hole 5 near the center of the endothermic fin. 3 is heated and melted in a furnace, and the solder is reliably spread from the upper part to the lower part of the joining surface of the endothermic fin 1 and the side plate 2, and the solder is solidly brazed.

〔Example〕

This invention will be explained below based on embodiments shown in the drawings.

In Figures 1 to 7, numeral 1 denotes a number of heat absorbing fins in a fin-and-tube heat exchanger, which are arranged in parallel at equal intervals, and 2 is a side plate attached to both sides of the first group of heat absorbing fins arranged in parallel. , 3 is a brazing material for soldering the heat absorbing fin 1 and the side plate 2.

In the embodiment shown in FIGS. 1 to 3, the side plates 2 attached to both sides of a group of heat-absorbing fins are divided into upper and lower parts, and the upper side plate 2a is connected to a notch 6 provided on both sides of the upper part of the heat-absorbing fin 1 with rod-shaped solder. The lower side plate 2b is provided with a brazing material receiving piece 4 bent in an inclined shape at the upper end thereof, and a V-shaped portion composed of the heat absorbing fin 1 and the brazing material receiving piece 4 is brazed. Place material 3 on top and make sure to solder it. In this embodiment, the flange portions 1a on both sides of the heat absorbing fin 1 are formed to be inclined laterally, and a portion of the flange portions 1a of the heat absorbing fin 1 are overlapped and arranged in parallel, and a side plate 2 is attached to the edge of the overlapped flange. The solder material 3 is made to flow between the flange portion 1a and the side plate 2 and between the flange portions 1a to form a soldered joint.

According to this embodiment, by heating in the furnace, the solder filler metal 3 on the upper part of the heat absorbing fin 1 causes the filler metal 3 to flow from the upper part of the heat absorbing fin 1 and the side plate 2 to the vicinity of the center, and the filler metal 3 on the lower brazing filler metal receiving piece 4 The solder is then flowed from near the center to the bottom to form the brazing. Even if the lower brazing metal is placed at a relatively lower position, the wax will climb up the flanges of the fin 1 and the gap between the fin 1 and the side plate 2 due to capillary action. The side plate 2 and flange parts can be filled and brazed together without any gaps.

Next, in another embodiment shown in FIGS. 4 to 7, the side plate 2 is not divided, and brazing material receiving holes 5 are provided near the center on both sides of the heat absorbing fin 1, and the rod-shaped brazing material 3 is
are inserted into the brazing material receiving holes 5 of the heat absorbing fins 1 arranged in parallel, and are brazed to the side plates 2. In this embodiment, the flange portions 1a of the heat absorbing fins 1 are bent at right angles, and the heat absorbing fins 1 are arranged side by side, side plates 2 are placed on both sides of the fins 1, and the solder material 3 is applied between the flange portions 1a and the side plates 2 and between the flanges. It is made to flow between the end and the fins so that they are soldered. The brazing material receiving hole 5 is formed in a downwardly tapered shape toward the joining surface between the fin and the side plate, so that the melted solder of the brazing material 3 can easily flow into the joining surface.

Furthermore, in the embodiment shown in FIG. 7, a notch hole 7 is provided in the flange portion 1a on the side corresponding to the lower side of the brazing material receiving hole 5, so that the solder dripping from the brazing material receiving hole 5 is transmitted to the notch hole 7. This makes it possible to braze the entire width of the flange portion 1a.

In the figure, 8 is a fin collar of the heat-absorbing fin 1, 9 is a heat-absorbing tube, and 10 is a brazing material.

According to this embodiment, by heating in a furnace, the solder metal 3 placed in the upper notch 6 of the endothermic fin 1 and the central solder receiving hole 5 causes the solder to flow between the fin 1, the side plate 2, and the fin, thereby performing brazing.

[Effect of idea]

According to this invention, solder metal is separately provided near the top and center of the heat absorbing fin and the side plate for brazing, so that the solder can be reliably filled into the gap between the top and bottom of the heat absorbing fin and the side plate. Can be soldered,
Therefore, heat conduction is good, strength is increased, durability is significantly improved, and gas leakage does not occur.

Furthermore, if the flange portions of the heat-absorbing fins are polymerized and soldered together, the strength of the joint between the fins can be increased, and even if the solder metal is provided on the relatively lower side plate, the solder metal will rise upward due to capillary action. Together with the upper brazing material, the heat-absorbing fins can be reliably brazed together, and the fins and the side plates can be reliably brazed. This improves airtightness and is safe, and also reduces the temperature rise of the side plates, ensuring durable safety. Can be secured.

[Brief explanation of the drawing]

Figures 1 to 3 show an embodiment of the heat exchanger of this invention, where Figure 1 is a perspective view, Figure 2 is a front view, and Figure 3 is taken along line X-X in Figure 2. 4 to 7 are different embodiments, FIG. 4 is a front view of the same, FIG. 5 is a sectional view taken along line Y-Y in FIG. 4, and FIGS. 6 and 7 are A perspective view of an embodiment of the heat absorbing fin and FIG. 8 is a front view of a conventional heat exchanger. 1... Endothermic fin, 2... Side plate, 2a... Upper side plate, 2b... Lower side plate, 3... Brazing metal, 4...
Brazing metal receiving piece, 5...Brazing metal receiving hole.

Claims (1)

[Claims for Utility Model Registration] Side plates 2 on both sides of a large number of heat absorbing fins 1 arranged in parallel.
In the heat exchanger for soldering, the side plate 2 is divided into upper and lower parts, the upper side plate 2a is brazed with a brazing material 3 on both sides of the heat absorbing fin 1, and the lower side plate 2b has a brazing material receiving piece 4 on its upper end. A heat exchanger characterized in that a brazing material 3 is provided on the brazing material receiving piece 4 for brazing. Side plates 2 are installed on both sides of a large number of heat absorbing fins 1 arranged in parallel.
In the heat exchanger soldering the heat absorbing fins 1
A heat exchanger characterized in that a brazing material 3 is provided at the upper part of both sides, a brazing material receiving hole 5 is provided near the center of both sides, and the brazing material 3 is provided in the brazing material receiving hole 5 for brazing. .