KR101576192B1

KR101576192B1 - Method of latent heat exchanger

Info

Publication number: KR101576192B1
Application number: KR1020140061195A
Authority: KR
Inventors: 허정선
Original assignee: 주식회사 알토엔대우
Priority date: 2014-05-21
Filing date: 2014-05-21
Publication date: 2015-12-10
Also published as: KR20150134178A

Abstract

Forming a housing in which a plurality of latent heat exchanging pipes are accommodated so that a plurality of latent heat exchanging pipes are installed in the housing so that the components can be manufactured through a single welding operation rather than a plurality of welding operations; Forming rectangular fixing holes on both sides of the one side of the housing by punching; Attaching each of the inlet header plate and the outlet header plate having a plurality of insertion holes into which the tip of the latent heat heat exchange pipe is inserted to the fixing holes together with a welding ring for bonding; Inserting the tip of the latent heat-heat exchange pipe into each insertion hole of the inlet header plate and the outlet header plate together with a welding ring for bonding and temporarily fixing the terminal; Covering and lining each lid member with an inlet port and an outlet port on the outer side of the inlet header plate and the outlet header plate together with a welding ring for bonding; And welding and fixing each of the temporarily fixed portions by a single welding process on a brazing welding furnace. The present invention also provides a method of manufacturing a latent heat heat exchanger.
As a result, it has high assembly efficiency as well as high productivity and economical efficiency.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a latent heat exchanger,

The present invention relates to a method of manufacturing a latent heat heat exchanger, and more particularly, to a method of manufacturing a latent heat heat exchanger in which a latent heat heat exchanger is manufactured by assembling each component, And a manufacturing method thereof.

Generally, a boiler is a heating device for receiving heating or hot water, that is, a heating device that heats water by using combustion heat generated in a combustion process of fuel, circulates heated water along a pipe, .

In recent years, condensing type boilers have been gradually popularized to maximize thermal efficiency with a minimum of fuel consumption.

The conventional condensing boiler includes a sensible heat exchanger in which sensible heat is directly brought into contact with the burner, a latent heat exchanger for preheating heating water to be supplied using the latent heat of the exhaust gas passed through the sensible heat exchanger and then supplying heating water to the sensible heat exchanger .

Hereinafter, a latent heat exchanger for recovering the latent heat of the exhaust gas passing through the sensible heat exchanger among the heat exchangers will be described.

The latent heat heat exchanger includes a housing, a plurality of latent heat heat exchange pipes arranged to circulate the circulating water therein so as to recover latent heat of exhaust gas in the housing, and a plurality of latent heat heat exchange pipes connected to the latent heat heat exchange pipe, An incoming header and an outgoing header are provided.

The latent heat exchanger is typically located at the upper or lower portion of the sensible heat exchanger depending on the installation position.

In the prior art for the latent heat heat exchanger as described above, the latent heat heat exchange pipe is soldered to each header as disclosed in Korean Patent No. 10-0725009 (hereinafter referred to as "prior patent document 1"), and the bending edge portion A technique has been proposed in which the number of parts is reduced and the manufacturing cost is reduced by performing soldering of the bent edge portion of the cover plate in the above-described in-furnace brazing solder fixation.

Also, as disclosed in Korean Patent Laid-Open Publication No. 10-2014-0001920 (hereinafter referred to as "Prior Patent Document 2"), there is also proposed a technique in which corrosion due to drain is reduced, .

Korean Patent No. 10-0725009 Korean Patent Publication No. 10-2014-0001920

In the prior art reference 1, each side of the body corresponding to the case is manufactured through welding or the like, and the inlet header and the outlet header are fixed to the body through welding or the like, and the latent heat exchanger pipes fixed to the respective headers are individually And each of them is connected and fixed through a welding operation or the like. Thus, there is a disadvantage that it is cumbersome and inconvenient that the connection fixing operation for connecting the respective parts must be performed several times.

In addition, the inlet header and the outlet header are respectively fixed to the casing through welding or the like, and a plurality of the latent heat exchanger pipes coupled to the inlet header and the outlet header are individually fixed through welding, respectively, Each lid coupled to the header also has a disadvantage that it is quite cumbersome and inconvenient to weld each part through several welding operations by welding and fixing the welding operation.

The main object of the present invention is to provide a latent heat exchanger which can be manufactured through a single welding operation rather than a plurality of welding operations after each component is assembled in manufacturing the latent heat heat exchanger. And a manufacturing method thereof.

It is another object of the present invention to provide a welding machine in which each component is smoothly supported according to a fixed pitch, and welding efficiency is improved.

According to an aspect of the present invention, there is provided a method for manufacturing a latent heat heat exchanger connected to a sensible heat exchanger to recover latent heat of an exhaust gas, wherein a plurality of latent heat heat exchange pipes are installed inside by drawing processing Forming a housing to form a receiving space portion; Forming rectangular fixing holes on both sides of the one side of the housing by punching; Attaching each of the inlet header plate and the outlet header plate having a plurality of insertion holes into which the tip of the latent heat heat exchange pipe is inserted to the fixing holes together with a welding ring for bonding; Inserting the tip of the latent heat-heat exchange pipe into each insertion hole of the inlet header plate and the outlet header plate together with a welding ring for bonding and temporarily fixing the terminal; Covering and lining each lid member with an inlet port and an outlet port on the outer side of the inlet header plate and the outlet header plate together with a welding ring for bonding; And welding and fixing each of the temporarily fixed portions by a single welding process on the brazing welding furnace.

The inflow header plate and the outflow header plate are fixed to the fixing holes and have a band-shaped frame frame on which the cover members are put, and a plate on which the plurality of insertion holes are formed on one side of the frame frame.

Each cover member is further provided with a cover flange coupled to the frame frame.

The housing has a top open, a flange for fastening to the sensible heat exchanger at an upper rim, and a drain pipe formed at the bottom.

The drain pipe is formed with an opposite side bottom surface on which the inlet header plate and the outlet header plate are fixed. The bottom surface is formed to be inclined from the inlet header plate and the outlet header plate side to the drain pipe side.

The present invention enables manufacturing of a latent heat heat exchanger through a single welding operation rather than a plurality of welding operations after each component is assembled, thereby achieving high assembly efficiency as well as high productivity and economical efficiency .

In addition, not only the respective parts are smoothly supported by the tight fitting, but also the welding efficiency can be improved, so that the assembling work can be further facilitated and high reliability can be ensured after welding.

1 is a block diagram for explaining the present invention;
2 is a flow chart for explaining the present invention,
3 is a latent heat exchanger manufactured by the present invention.

Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the accompanying drawings. The present invention is not limited to the embodiments.

Fig. 1 is a block diagram for explaining the present invention, Fig. 2 is a flowchart for explaining the present invention, and Fig. 3 is a latent heat heat exchanger manufactured by the present invention.

As shown in the figure, the latent heat exchanger 1 is connected to a sensible heat exchanger (not shown) in which the sensible heat generated by the burner is directly contacted with a boiler of a conventional condensing system to recover latent heat of the exhaust gas. The method comprising:

The present invention is intended to enable the manufacture of a latent heat heat exchanger through a single welding operation rather than a plurality of welding operations after each component is assembled.

The latent heat heat exchanger (1) according to the present invention includes a housing (10) for forming a housing space (12) in which a plurality of latent heat heat exchange pipes (S1). &Lt; / RTI >

At this time, the housing 10 is opened at its top, a flange 14 for fastening to the sensible heat exchanger is formed at an upper edge thereof, and a drain pipe 16 is formed on the bottom surface for discharging condensed water generated during heat exchange. The drawing is formed.

In addition, the drain pipe 16 is formed by an inlet header plate and an opposite side bottom surface on which the outlet header plate is to be fixed, and the bottom surface of the inlet header plate and the outlet header It is preferable to be inclined from the plate side to the drain pipe side.

Then, a step S2 of forming rectangular fixing holes 18 by punching in a conventional pressing method for fixing the inlet header plate and the outlet header plate to be described later is performed on both sides of one side of the housing 10 . At this time, a coupling flange 18a for fixing the inlet header plate and the outlet header plate, which will be described later, is formed on the outer side surface when the fixing hole is formed by the hole.

Each of the inlet header plate 20 and the outlet header plate 20A having a plurality of insertion holes 22 into which the tips of the latent heat exchanging pipes are inserted are inserted into the fixing holes 18, A step S3 of temporarily fixing the workpiece together with the welding ring R such as a ring or the like is performed. That is, each of the inlet header plate and the outlet header plate is inserted into each of the fixing holes together with the welding ring so that the welding can be performed in one welding process described below according to the machining definition. At this time, it is preferable to use a bellows type flexible tube having high flexibility and heat exchange efficiency as the latent heat heat exchange pipe. The inlet header plate 20 and the outlet header plate 20A are fixed to the fixing holes 22 and have a band-shaped frame 20a on which the respective cover members to be described later are put, And a plate 20b on which a plurality of insertion holes 22 are formed. Also, an extension flange is further formed on the rim of the insertion hole so that the latent heat exchanging pipe, which will be described later, is smoothly inserted into and supported by the plate.

Thus, when the inlet header plate and the outlet header plate are fixed to the fixing holes, the ends of the latent heat exchanging pipes 30 are joined to the insertion holes 22 of the inlet header plate 20 and the outlet header plate 20A (Step S4) of inserting and fixing the welding ring R such as a normal brazing ring for welding.

The lid member 40 and the lid member 40A on which the inlet port 42 and the outlet port 44 are formed are connected to the outer side surfaces of the inlet header plate 20 and the outlet header plate 20A, And a step S5 of covering and fixing with a welding ring R such as a conventional brazing ring or the like. Each cover member 40 (40A) is further provided with a cover flange 40a which is easily coupled to the frame frame 20a.

Finally, a step (S6) of welding and fixing each of the temporarily fixed portions by a single welding process on the brazing welding furnace. That is, the welding ring, which is assembled together in the temporary fixing process, is melted on the brazing welding furnace, so that the welding ring is allowed to seep into the respective surfaces contacting with each other.

As described above, according to the present invention, the respective parts of the latent heat heat exchanger are individually welded, that is, they are not fixed through a plurality of welding operations. Instead, they can be welded through a single welding operation The production of the latent heat heat exchanger is simply completed by one welding operation.

Therefore, the present invention not only maximizes the assembling efficiency but also increases the production efficiency, and also has an excellent economical efficiency.

1: latent heat exchanger
10: housing 12:
14: flange 16: drain pipe
18: Fixing hole 18a: Coupling flange
20: inlet header plate 20A: outlet header plate
20a: frame frame 20b: plate
22: insertion hole 30: latent heat heat exchange pipe
40, 40A: lid member 40a: lid flange
42: inlet 44: outlet

Claims

A method for manufacturing a latent heat heat exchanger connected to a sensible heat exchanger and capable of recovering latent heat of an exhaust gas,
Forming a housing such that a receiving space portion in which a plurality of latent heat heat exchange pipes are built in by drawing processing is formed;
Forming rectangular fixing holes on both sides of the one side of the housing by punching;
Attaching each of the inlet header plate and the outlet header plate having a plurality of insertion holes into which the tip of the latent heat heat exchange pipe is inserted to the fixing holes together with a welding ring for bonding;
Inserting the tip of the latent heat-heat exchange pipe into each insertion hole of the inlet header plate and the outlet header plate together with a welding ring for bonding and temporarily fixing the terminal;
Covering and lining each lid member with an inlet port and an outlet port on the outer side of the inlet header plate and the outlet header plate together with a welding ring for bonding; And
Welding each of the temporarily fixed portions by a single welding process on a brazing welding furnace,
The housing has a top open, a flange for fastening to the sensible heat exchanger at an upper edge thereof, and a drain pipe formed at a bottom surface thereof. The drain pipe is fixed to the inlet header plate and the outlet header plate Wherein the bottom surface is inclined so that the flow of condensed water smoothly flows from the inlet header plate and the outlet header plate toward the drain pipe.

The method according to claim 1,
Wherein the inlet header plate and the outlet header plate are fixed to the fixing holes and are formed of a plate-shaped frame frame on which the cover members are put, and a plate having the plurality of insertion holes formed on one side of the frame frame. Wherein the heat exchanger is a heat exchanger.

3. The method of claim 2,
Wherein each lid member is further provided with a lid flange coupled to the rim. &Lt; RTI ID = 0.0 > 11. < / RTI >

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