JPH02290691A - Heat exchanger - Google Patents

Abstract

PURPOSE:To surely allow brazing material to flow into gap and to prevent insufficient sticking by arranging notch part having dimension a little larger than diameter of the brazing filler rod parallel to side plates at both shoulder parts of fins joining with the side plates and forming inserting grooves for the brazing filler rod. CONSTITUTION:Combustion gas generated with a burner 9 is passed through a combustion chamber 8 and gaps between fins in a heat exchanger 7 and discharged. Water in a pipe receives heat through the fins and the heat exchange pipe 6 and is discharged as high temp. water. When sticking of the fins to the side plates is insufficient, hole is developed by high temp. combustion gas. For this countermeasure, the positions putting the brazing filler rod for sticking the fin to the side plate are formed by arranging the notching parts parallel to the side plates, therefore even if the brazing filler rod bends, the brazing filler rod is brought into contact with the side plate. By this method, at the time of welding with the brazing filler rod, the brazing material is surely allowed to flow into the gap between the fin and the side plate and insufficient sticking of the gap between the fin and the side plate is not developed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a structure for improving the brazing properties of the fins and the +1 plate in a cross-fin tube type heat exchanger.

[Jubei technology]

The conventional heat exchanger is shown in Figure 4. As shown in this description, a plurality of heat exchanger pigs 6 are passed through, and a large number of fins 10 arranged in parallel have a structure in which they are closely layered with the measuring plate 8. For this reason, during manufacturing, the brazing material 2 is placed on both shoulders of the fin, and the brazing material flows through the gap K between the IJtiI plate 3 and the fin 10 when brazing in a furnace.

In addition, the things related to this i as d include, for example,
Utility Model Publication No. 514-152436, Japanese Patent Application Publication No. 60-7187
There are 11 issues listed.

[Problems that the invention helps solve]

As shown in Fig. 4, when the row bar 2 is curved in the axial direction, the row bar 2 becomes C as shown by the dotted line 5, and the side plate 3 and the row bar 5 are separated. Therefore, low bar 5
When it comes into contact with the bath, it does not pass through the gap between the fin 10 and the side plate 8, resulting in a dense layer failure.

An object of the present invention is to allow the brazing material to flow well through the gap between the fin 10 and the side plate 8 when the mouth 45 moves forward even when the mouth 45 is curved.

[Means to solve the problem]

In order to achieve the above objective, the shape of the notch in the fin where the mouth is placed has been changed, and the notch is formed so that the row rod will come into close contact with the side plate even if the row rod is curved. It is.

[Effect]

Even if the row 1 is curved four times, the row rods will be densely layered on the side, so when the row rod melts, the solder material will reliably R in the gap between the fin and the side plate. Therefore, there is no possibility of poor contact between the fin and the side plate. [Central Embodiment] A central embodiment of the present invention will now be explained with reference to FIGS. 1 to 3.

As shown in Figure 2, a combustion gas is placed upstream of the heating device 7, and a burner 9 is placed upstream of the combustion gas. As shown in Fig. 8, the heating device 7 is formed from a heat return pipe 6 that connects the heat return pipe 6 to the heat return pipe 6.

As shown in Figure 1, notches 4 are provided on both shoulders of the fin as parts for placing the row rods 2 of the fin l, and these notches are
A cutout groove is provided parallel to the side plate 8.

The width of the notch is slightly larger than the diameter of the row barrel 2.

In the above structure, the combustion gas generated by the burner 9 passes through the combustion chamber 8 and exits through the gaps between the fins 1 of the heat exchanger 7. The water in the pipe receives heat through the fi/l and heat exchange pipe 6 and exits as high-temperature water. In this case, if the adhesion between the side plate 3 and the fins 1 is poor, the side plate 3 will become hot due to the high temperature combustion gas, and holes will occur. For this reason, it is necessary to densely layer the fillet 1 and the side plate 8 with brazing material, but in the embodiment shown in FIG. As shown,
Since the row rod 2 and the side plate 8 are in contact with each other, when the row material 2 is melted, the material flows well into the gap between the fin 1 and the side plate 3.

Furthermore, during furnace brazing, bending may occur when the solder 42 melts, but in this case as well, the movement of the mouth 42 is restricted, resulting in poor geometry of the fin 1 and side plate 3. Never.

〔Effect of the invention〕

According to the present invention, since the part for placing the loincloth for placing the fins in a dense layer on the side plate is formed by providing a notch parallel to the side plate, even if the row rod is curved, the row one and the side plate are in contact with each other. When the row rod is melted in the bath, the gap between the fin and the side plate is a
One material simply flows into the flow fL, and there is no possibility of poor adhesion.

[Brief explanation of drawings]

Figure 5g1 shows a sectional view of a heat exchanger according to an embodiment of the present invention, Figure 2 is a front view when the heat exchanger is assembled into a boiler, and Figure g8 is a plan view of the heat exchanger. be. The younger brother 4 is
IIil of conventional heat exchanger? Show a top view. 1.10...fin 2...mouth-4 8...
Side plate 4...notch 7...heat exchanger. 1 figure 74 units

Claims (1)

[Claims] 1. A heat exchanger of a black fin type heat exchanger, characterized in that a notch slightly larger than the diameter of the row rod is formed in both shoulders of the fins connected to the side plate in parallel with the side plate to form an insertion groove for the row rod.