KR101761643B1

KR101761643B1 - Heat Exchanger Case Junction for Latent Heat of Boiler

Info

Publication number: KR101761643B1
Application number: KR1020150127197A
Authority: KR
Inventors: 임경섭; 이현철; 이헌재
Original assignee: 린나이코리아 주식회사
Priority date: 2015-09-08
Filing date: 2015-09-08
Publication date: 2017-07-27
Also published as: KR20170030149A

Abstract

The present invention relates to a case joining structure of a latent heat heat exchanger case of a condensing boiler, which improves the joining site structure of a case of a latent heat heat exchanger of a condensing boiler and fixes it by spot welding. It is.
To this end, according to the present invention, there is provided a latent heat heat exchanger case joining structure for a boiler in which a front plate, a rear plate, a bottom plate and an upper plate are integrally formed and welded to each other, A downward projecting portion 43 is formed at a position spaced apart from the downward projecting portion 43 and a downward projecting portion 43 of the one-side plate 40 is formed with a Z- And a bent portion 41 formed on the one side plate 40 is positioned on the other plate 50 so as to be positioned on the other side plate 50. [ And a spot welding part (70) for fixing the overlapped portion of the plates (40) (50) overlapped by the positioning means.

Description

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

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a case junction structure of a latent heat heat exchanger of a condensing boiler and more specifically to a case of a latent heat heat exchanger of a condensing boiler, To a case junction structure of a latent heat heat exchanger of a boiler.

Generally, the boiler is heated by using the combustion heat generated when the fuel is burned, and is circulated to the heating pipe installed in the room by the circulation pump for forcibly circulating the heated and heated water to heat the room It is a device that supplies hot water to bathrooms and kitchens.

These boilers can be divided into various types according to the control method or the closed state. In addition, the boilers can be classified into the condensing type and the non-condensing type according to the heat source for heating the heating water.

The condensing system has a sensible heat exchanger that directly heats the heating water by using the heat burned by the gas burner, and a latent heat exchanger that absorbs the latent heat of condensation of the exhaust gas passing through the sensible heat exchanger again to maximize thermal efficiency. The non-condensing type means that only the sensible heat exchanger is provided.

In addition, the condensing gas boiler having the sensible heat exchanger and the latent heat heat exchanger is divided into a downward burning type in which the gas moves downward to supply heat and an upwardly burning type gas boiler in which the heat is moved upward to supply heat .

Generally, the structure of the upwardly-burning condensing gas boiler will be described as follows: a gas burner 10 'for generating heat in the combustion chamber as disclosed in Korean Patent Publication No. 10-1135231; A latent heat exchanger 20 'for heating the hot water flowing into the sensible heat pipe and a latent heat heat exchanger 20' for providing latent heat to the hot water flowing through the latent heat pipe using the exhaust heat used in the sensible heat exchanger 20 ' And a heat exchanger 30 '.

Therefore, a sensible heat exchanger 20 'is disposed above the gas burner 10', and a latent heat heat exchanger 30 'for latent heat heat exchange is disposed above the sensible heat exchanger 20'.

In the gas boiler, there are provided a neutralizer for collecting and discharging the condensed water formed in the sensible heat exchanger 20 'and the latent heat heat exchanger 30', and a condenser for condensing the condensed water condensed in the latent heat heat exchanger 30 ' A cistern tank having a constant space is also provided.

When the condensing gas boiler having such a configuration is operated, the air is supplied by the blowing fan F and the gas is supplied through the gas supply pipe, and the gas burner 10 'installed at the lower part of the combustion chamber is ignited to generate a flame .

Accordingly, the combustion heat of the gas burner 10 'is directly transferred to the sensible heat exchanger 20' to heat the heating water flowing through the internal duct, and the latent heat heat exchanger 30 'installed on the flow path of the exhaust duct, The heating water is heated by recovering the latent heat in the exhaust gas.

The exhaust gas that has passed through the latent heat heat exchanger 30 'is discharged to the outside through the exhaust port 35a'.

At this time, in the process of recovering the latent heat of condensation at the latent heat heat exchanger 30 ', condensed water is generated, and the condensed water naturally falls down to be received by the condensate water receiving diaphragm and discharged to the outside through the pipe, do.

On the other hand, the heating water heated by the sensible heat exchanger 20 'passes through the heating pipe to finish the heating of the room, and the heating water thus heated flows into the cistern tank via the heating water pipe, And is then supplied to the sensible heat exchanger 20 'through a water supply pipe by the operation of a circulation pump (not shown), and then heated again through the sensible heat exchanger 20' And then to the heating pipe again through the pipe.

This process is repeatedly performed so that the heating water circulates and the heating operation is performed.

2, the front plate 31 ', the rear plate 32' and the bottom plate 34 'are separated from each other by the upper plate 33' So that the work is terminated by laser welding the abutting portion 35 '.

(Prior art document)

(Patent Document 0001) Korean Patent Registration No. 10-1135231 (Registered April 03, 2012)

(Patent Document 0001) Korean Laid-Open Patent Publication No. 10-2015-0012743 (Published May 2015.02.04)

However, in the conventional latent-heat heat exchanger case having such a structure, a portion where the one plate is folded to form the front plate, the back plate, the upper plate, and the bottom plate is closed by expensive laser welding, In addition, since there is no positioning means when assembling the plate in the butt assembly, the weld surface (the contact surface of the plate) does not line up exactly due to the spring back phenomenon, Defects were generated.

SUMMARY OF THE INVENTION The present invention has been made in order to solve such problems, and it is an object of the present invention to dramatically improve the structure of the abutting portion of the plate, so that it can be finished by low cost spot welding instead of expensive laser welding.

Another object of the present invention is to improve the structure of the abutting portion of the plate so as to maintain the correct position without using a separate jig when the welding is finished by spot welding.

According to an aspect of the present invention, there is provided a latent heat heat exchanger case joining structure of a boiler in which a front plate, a rear plate, a bottom plate, and an upper plate are integrally formed and welded to each other, A downward projecting portion is formed at a position spaced apart from the welding surface to be welded with a TIG, and the downward projecting portion is provided with a Z-bent bent portion formed on one side plate and a plate on the other side on which a cut portion receiving the downward projecting portion of the one- A positioning means for positioning the bent portion formed on the one side plate to the other plate 50 and a spot welding portion for fixing the overlapping portion of the plate superimposed by the positioning means A latent heat exchanger case junction structure of the boiler is provided.

The present invention has a positioning means at a portion where plates are brought into contact with each other when a plate of the welding portion is brought into contact with the plate as compared with the conventional structure, thereby improving workability and cost. The gap due to the Z bending is maintained by the packing during assembly of the latent heat heat exchanger, thereby preventing the waste gas from leaking in advance.

Fig. 1 is a perspective view showing the structure of a conventional upwardly-directed condensing gas boiler
2 is a perspective view showing a case of a conventional latent heat heat exchanger
3 is an exploded perspective view showing a main part of a case of the latent-heat heat exchanger of the present invention
Fig. 4 is a perspective view of the assembled state of Fig.
5 is a sectional view taken along line A-A in Fig. 4

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings, which will be readily apparent to those skilled in the art to which the present invention pertains. The present invention may be embodied in many different forms and is not limited to the embodiments described herein. The drawings are schematic and illustrate that they are not drawn to scale. The relative dimensions and ratios of the parts in the figures are shown exaggerated or reduced in size for clarity and convenience in the figures, and any dimensions are merely illustrative and not restrictive. And to the same structure, element or component appearing in more than one drawing, the same reference numerals are used to denote similar features.

FIG. 3 is an exploded perspective view showing the main part of the case of the latent heat heat exchanger of the present invention, FIG. 4 is a perspective view of the assembled state of FIG. 3, and FIG. 5 is a sectional view taken along the line A - A of FIG. Downward projecting portion 43 is formed at a position spaced apart from the welding surface 60 which is in close contact with the welding surface 60 by "s" and a Z-bending bent portion 41 is formed in the downwardly projecting portion, A plate 50 on the one side where the plate 40 and a cutout 52 in which the downward projection 43 of the one plate 40 is received are formed; A spot welding point for fixing the overlapped portion of the plates 40 and 50 overlapped by the positioning means, a positioning means for positioning the positioning plate 41 on the other plate 50, (70).
Quot; s "from the welding surface 60 to be Tig welded refers to a distance such that the bent portion 41, which is Z-bendable by heat generated in the tig welding, does not cause deformation.

delete

In the embodiment of the present invention, as the positioning means, a piercing hole 42 formed in the bent portion 41 of the one side plate 40 and a burring hole (not shown) formed in the plate 50 corresponding to the piercing hole 51), but it can be understood that it can be applied in various forms.

Therefore, if the cutout 52 formed on the other plate 50 is placed on the bent portion 41 connected to the downward protruding portion 43 of the plate 40 on one side in order to spot-weld the contact portion of the case 5, the burring hole 51 formed in the plate 50 on one side is inserted into the piercing hole 42 formed in the bent portion 41, and the positions thereof are determined.

When the spot welding 70 is performed on both sides of the piercing hole 42 as shown in FIG. 4 because the end of the burring hole 51 inserted in the piercing hole 42 is pressed and integrated physically, Is completed.

After the abutting portion of the case is finished by spot welding, the bending portion 41 is positioned on the inner side by "S" from the welding surface 60 to which the tig welding is performed, and the bending portion 41 is formed on one side plate 40 The tig welding surface 60 maintains a straight line as in the conventional case, so that it is possible to prevent a defect due to the tig welding of the side plate.

On the other hand, when the welded portion of the case is welded, spot welding is performed to the bent portion 41 to cause a minute gap. However, in the process of fixing the component (not shown) to the case, And the air conditioner can be maintained.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention may be embodied with various changes and modifications without departing from the scope of the invention. will be.

It is therefore to be understood that the embodiments described above are to be considered in all respects only as illustrative and not restrictive, the scope of the invention being described in the foregoing specification is defined by the appended claims, Ranges and equivalents thereof are to be construed as being included within the scope of the present invention.

40, 50: plate 41:
42: Pierce hole 43: Downward protrusion
51: burring hole 52: incision part
60: TIG welding surface 70: Spot welded part

Claims

In the case of a latent heat heat exchanger case joining structure of a boiler in which a front plate, a back plate, a bottom plate, and an upper plate are integrally formed and welded to each other, welded to a point spaced from a welding surface A downward protruding portion 43 is formed and the downward protruding portion is formed with one side plate 40 in which a Z bending bent portion 41 is formed continuously and a cutout portion 43 in which a downward protruding portion 43 of the one side plate 40 is received A positioning means for positioning the bent portion 41 formed on the one-side plate 40 to the other plate 50; And a spot welded portion (70) for fixing the overlapped portion of the plates (40) (50) superimposed by the means.

The method according to claim 1,
The positioning means is a burring hole 51 formed in a piercing hole 42 formed in the bent portion 41 of the one side plate 40 and a plate 50 corresponding to be fitted in the piercing hole. The Case Connection Structure of Latent Heat Exchanger in a Boiler.

The method of claim 2,
Characterized in that the burring hole (51) is fitted in the piercing hole (42) formed in the bent portion (41) of the plate (40) Latch heat exchanger case junction structure.

The method according to claim 1,
Wherein the bent portion 41 is formed to be spaced apart from the welded surface 60 to be welded to be tig welded so that the welded surface 60 to be welded to the welded portion is positioned on a straight line without being deformed. .