KR102546693B1 - Structure for preventing damage of heat exchanger components by combustion heat - Google Patents

Abstract

The present invention can prevent the packing provided at the connection between the sensible heat exchanger and the latent heat exchanger from being burned by the combustion heat of the combustion gas, and also prevent the front and rear surfaces of the sensible heat exchanger from being discolored by the combustion heat of the combustion gas. Its purpose is to provide a structure for preventing burnout of heat exchanger parts caused by combustion heat.
The present invention for implementing this, the sensible heat exchanger 40 for absorbing the combustion sensible heat generated in the combustion chamber 30; a latent heat exchanger (50) for absorbing latent heat of steam included in the combustion gas that has undergone heat exchange in the sensible heat exchanger (40); A packing 80 provided between the sensible heat connection part 410 and the latent heat connection part 510 to which the sensible heat exchanger 40 and the latent heat exchanger 50 are connected to prevent leakage of combustion gas; and a combustion heat blocking means 100 for blocking the heat dissipation of the combustion gas from being directly transmitted to the packing 80.

Description

Structure for preventing damage of heat exchanger components by combustion heat}

The present invention relates to a structure for preventing burnout of heat exchanger components due to combustion heat, and more particularly, to prevent a packing provided at a connection between a sensible heat exchanger and a latent heat exchanger to prevent leakage of combustion gas from being burned due to combustion heat. In addition, it relates to a structure for preventing burnout of heat exchanger parts caused by combustion heat, which can prevent discoloration of a wall surface of a sensible heat exchanger by combustion heat.

A boiler is a device that heats a heat medium in a sealed container by a heat source to heat a desired area.

The heat exchanger of the early boiler used only the sensible heat generated during combustion of the burner and discharged the high-temperature combustion gas as it is through the exhaust duct, so the thermal efficiency of the boiler was very low and it took a long time to obtain high-temperature heating water.

Therefore, recently produced boilers include a sensible heat exchanger that absorbs sensible heat of combustion gas generated in a combustion chamber to increase thermal efficiency, and a latent heat exchanger that absorbs latent heat of steam contained in combustion gas that has undergone heat exchange in the sensible heat exchanger. A boiler of this type is called a condensing boiler.

The condensing boiler includes a blower that sucks in external air and supplies air necessary for combustion, a burner that burns a mixture of air and fuel supplied through the blower, a sensible heat exchanger that absorbs sensible combustion heat generated by the burner, and It includes a latent heat exchanger for absorbing latent heat of steam contained in combustion gas that has undergone heat exchange in the sensible heat exchanger, and an exhaust duct through which the combustion gas that has passed through the latent heat exchanger is discharged. It consists of a structure in which a condensate receiver is formed to collect and discharge the condensate generated as the steam contained in the passing combustion gas is condensed.

In general, in condensing water heaters and boilers, the sensible heat exchanger and the latent heat exchanger are manufactured as separate modules, and the connection parts of the sensible heat exchanger and the latent heat exchanger are coupled by fastening means such as bolts and nuts, and the connection part prevents leakage of combustion gas. Packing is provided to prevent it.

However, in the conventional condensing water heater and boiler structure, there is a lack of means for blocking direct contact of high-temperature combustion gas to the packing, and the packing is hardened and carbonized by the combustion heat of the combustion gas to burn out, thereby reducing the durability of the packing. There is a problem with deterioration.

On the other hand, in condensing water heaters and boilers, water pipes are installed on the outer wall of the combustion chamber at vertical intervals as a means for preheating the heat medium and cooling the combustion chamber, and in the sensible heat exchanger, the tube through which the heat medium flows and the electric heat coupled to the outer surface thereof A fin is installed, and the space between the water pipe installed at the bottom and the adjacent tube and the side walls of the heat exchanger facing the space are relatively far apart from the heat medium, making them vulnerable to heat. The durability is lowered, and the discolored part has a problem in appearance.

The prior art that points out the problem of burning of the packing and discoloration of the heat exchanger due to the combustion heat of the combustion gas as described above and suggests a solution to this problem has not been searched.

However, as a prior art related to condensing boilers, Registration Patent No. 10-0473083 discloses a heat exchanger of a condensing boiler in which a sensible heat exchanger and a latent heat exchanger are manufactured as separate modules and their connections are assembled. No. 1199621 and Patent Registration No. 10-1109856 show a general configuration of a fin-tube type heat exchanger.

The present invention has been made to solve the above problems, and prevents the problem that the packing provided at the connection part of the sensible heat exchanger and the latent heat exchanger is burned by the combustion heat of combustion gas, and the front and rear surfaces of the sensible heat exchanger It is an object of the present invention to provide a structure for preventing burnout of heat exchanger parts caused by combustion heat, which can prevent discoloration by combustion heat of combustion gas.

A structure for preventing burnout of heat exchanger components by combustion heat according to the present invention for realizing the object described above includes a sensible heat exchanger 40 that absorbs sensible combustion heat generated in a combustion chamber 30; a latent heat exchanger (50) for absorbing latent heat of steam included in the combustion gas that has undergone heat exchange in the sensible heat exchanger (40); A packing 80 provided between the sensible heat connection part 410 and the latent heat connection part 510 to which the sensible heat exchanger 40 and the latent heat exchanger 50 are connected to prevent leakage of combustion gas; And a combustion heat blocking means 100 for blocking the heat dissipation of the combustion gas from being directly transferred to the packing 80, but outer walls are formed on the front and rear surfaces of the combustion chamber 30 and the sensible heat exchanger 40. A sensible heat panel 41 is provided, and a plurality of water pipes 42 located outside the sensible heat panel 41 and spaced vertically are provided on the front and rear surfaces of the combustion chamber 30, and the sensible heat The heat exchanger 40 is provided with a plurality of tubes 43 through which the heat medium flows, located between the water pipe 42 and the tube 43 provided adjacent to the water pipe 42 A heating guide 90 covering the inner surface of the water pipe 42 and guiding the combustion gas to flow toward the tube 43 is provided on the inner surface of the sensible heat panel 41 .

A sensible heat flange part 411 in contact with the upper surface of the packing 80 is formed in the sensible heat connection part 410, and a latent heat flange part 511 on which the packing 80 is seated is formed in the latent heat connection part 510, The combustion heat blocking means 100 may include a combustion heat inflow prevention protrusion 512 extending from the inner end of the latent heat flange part 511 to the inner side of the inner end of the sensible heat flange part 411. can

A sensible heat flange part 411 in contact with the upper surface of the packing 80 is formed in the sensible heat connection part 410, and a latent heat flange part 511 on which the packing 80 is seated is formed in the latent heat connection part 510, The combustion heat blocking means 100 may include a combustion heat inflow prevention protrusion 513 extending from the inner end of the latent heat flange part 511 to contact the lower surface of the inner end of the sensible heat flange part 411. can

The combustion heat inflow prevention protrusion 513 may be configured to be in surface contact with the lower surface of the inner end of the sensible heat flange portion 411 .

A sensible heat flange part 411 in contact with the upper surface of the packing 80 is formed in the sensible heat connection part 410, and a latent heat flange part 511 on which the packing 80 is seated is formed in the latent heat connection part 510, The combustion heat blocking means 100 may include a combustion heat inflow prevention protrusion 412 bent from the inner end of the sensible heat flange part 411 to contact the upper surface of the inner end of the latent heat flange part 511. can

The combustion heat inflow prevention protrusion 412 may be configured to be in surface contact with the upper surface of the inner end of the latent heat flange portion 511 .

delete

The heating guide 90 has a curved portion 91 formed in a shape surrounding the inner surface of the water pipe 42, and is formed obliquely extending from the lower end of the curved portion 91 toward the tube 43. It may be composed of a guide portion (92).

According to the structure for preventing burnout of heat exchanger parts due to combustion heat according to the present invention, by providing a combustion heat blocking means at the connection part between the sensible heat exchanger and the latent heat exchanger, the problem of burning due to hardening and carbonization of the packing by combustion heat is prevented and the parts durability can be improved.

In addition, by providing a heating guide that guides the flow of combustion gas toward the tube between the water pipe and the tube, the problem of durability deterioration due to discoloration of the sensible heat panels provided on the front and rear surfaces of the sensible heat exchanger due to the combustion heat of the combustion gas is prevented. can do.

1 is a view schematically showing a condensing boiler to which the present invention is applied;
2 is a cross-sectional view showing one embodiment of a combustion heat blocking means for preventing burning of packing due to combustion heat according to the present invention;
3 is a cross-sectional view showing another embodiment of a combustion heat blocking means for preventing burning of packing due to combustion heat according to the present invention;
4 is a cross-sectional view showing another embodiment of a combustion heat blocking means for preventing burning of packing due to combustion heat according to the present invention;
5 is a cross-sectional view showing an installation structure of a heating guide for preventing discoloration of the front and rear surfaces of a sensible heat exchanger by combustion heat according to the present invention;
6 is a perspective view of a sensible heat exchanger of a condensing boiler to which the present invention is applied;
Figure 7 is a front view of Figure 6;
Figure 8 is (a) cross-sectional view along line CC of Figure 7, (b) cross-sectional perspective view,
9 is a perspective view of the heating guide viewed from different directions;

Hereinafter, the configuration and operation of a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 and 2, the condensing boiler 1 to which the present invention is applied ignites a blower 10 for supplying supply air and a mixture of combustion gas and air supplied from the blower 10. A burner 20, a combustion chamber 30 in which combustion of the mixture takes place, a sensible heat exchanger 40 for heating a heating medium by absorbing sensible heat of the combustion gas generated in the combustion chamber 30, and the sensible heat exchanger 40 ), a latent heat heat exchanger 50 for absorbing latent heat of steam contained in the combustion gas that has undergone heat exchange, a condensate receiver 60 for collecting and discharging condensate generated in the latent heat heat exchanger 50 to the outside, and combustion It is configured to include an exhaust duct 70 through which gas is exhausted.

Sensible heat panels 41 forming outer walls of the combustion chamber 30 and the sensible heat exchanger 40 are provided on front and rear surfaces of the combustion chamber 30 and the sensible heat exchanger 40 .

A plurality of water pipes 42 located outside the sensible heat panel 41 and spaced vertically are provided on the front and rear surfaces of the combustion chamber 30 . The heat medium flowing along the water pipe 42 is preheated by absorbing combustion heat generated in the combustion chamber 30 and performs a combustion chamber cooling function to prevent overheating of the combustion chamber 30 .

The sensible heat exchanger 40 includes a tube 43 through which the heat medium flows through the water pipe 42, and a plurality of heat transfer fins coupled to the outer surface of the tube 43 at regular intervals along the longitudinal direction. (44).

The heat medium is introduced through the heat medium inlet 40a (see FIG. 7) and absorbs latent heat while passing through a heat medium passage (not shown) provided in the latent heat heat exchanger 50, and then the sensible heat exchanger 40 While sequentially passing through the water pipe 42 and the tube 43 provided therein, sensible heat is absorbed and heated, and the heated heat medium is discharged through the heat medium outlet 40b and can be used for heating or hot water.

The sensible heat exchanger 40 and the latent heat exchanger 50 are manufactured as separate modules, and the sensible heat connection 410 formed at the lower end of the sensible heat exchanger 40 and the latent heat formed at the upper end of the latent heat exchanger 50 The connecting portion 510 is coupled by fastening means such as bolts and nuts.

A packing 80 is provided between the sensible heat connection 410 and the latent heat connection 510 to prevent combustion gas from leaking to the outside through the gap between the sensible heat connection 410 and the latent heat connection 510.

As a configuration for coupling the packing 80 to the connection part of the sensible heat exchanger 40 and the latent heat exchanger 50, the sensible heat connection part 410 has a sensible heat flange part 411 in contact with the upper surface of the packing 80 A latent heat flange portion 511 having a seating groove 510a in which the packing 80 is seated is formed at the latent heat connection portion 510 .

In the present invention, a combustion heat blocking means (100; 100-1,100-2,100-3) is provided to block the combustion heat of combustion gas from being directly transferred to the packing 80.

The combustion heat blocking means 100 is a packing 80 in which the high-temperature (about 300 ° C.) combustion gas passing through the sensible heat exchanger 40 flows into the gap between the sensible heat flange part 411 and the latent heat flange part 511. It functions to prevent burnout due to hardening and carbonization of the packing 80, which may be caused when it comes into direct contact with.

As one embodiment, as shown in FIG. 2, the combustion heat blocking means 100-1 moves upward from the inner end of the latent heat flange part 511 to the inner side of the inner end of the sensible heat flange part 411. It is composed of an extended combustion heat inflow prevention projection 512 .

As another embodiment, as shown in FIG. 3 , the combustion heat blocking means 100-2 has an upper side in contact with the lower surface of the inner end of the sensible heat flange part 411 at the inner end of the latent heat flange part 511. It consists of a protrusion 513 extending to prevent inflow of combustion heat.

When the combustion heat inflow prevention projection 513 is configured to be in surface contact with the lower surface of the inner end of the sensible heat flange portion 411, it is possible to effectively block combustion gas from flowing into the packing 80 side.

As another embodiment, as shown in FIG. 4 , the combustion heat blocking means 100-3 contacts the upper surface of the inner end of the latent heat flange part 511 at the inner end of the sensible heat flange part 411. It consists of a bent combustion heat inflow prevention protrusion 412.

When the combustion heat inflow prevention protrusion 412 is configured to be in surface contact with the upper surface of the inner end of the latent heat flange portion 511, it is possible to effectively block combustion gas from flowing into the packing 80 side.

On the other hand, referring to FIGS. 1 and 5 to 9, in the present invention, the combustion gas flows into the space between the water pipe 42 located at the bottom and the tube 43 disposed adjacent to it, and shown in FIG. As shown in the figure, as a means for solving the problem of deterioration in durability and deterioration of the appearance due to the occurrence of discoloration 41a, which may be caused when the sensible heat panel 41 is overheated, a water pipe located at the bottom It is configured to include a heating guide 90 that guides the flow of combustion gas passing through 42 to flow toward the tube 43.

As shown in FIG. 9, the heating guide 90 has a curved portion 91 formed in a shape surrounding the inner surface of the water pipe 42 and the tube 43 at the lower end of the curved portion 91. It consists of a guide portion 92 formed obliquely extending in the direction toward which it is directed.

According to the configuration of the heating guide 90, as shown by arrows in the flow direction of the combustion gas in FIG. 8, the combustion gas flowing downward along the front and rear surfaces of the combustion chamber 30 is located at the lowest water pipe ( 42) and the tube 43 disposed adjacent thereto, the flow direction is directed toward the tube 43 by the curved portion 91 and the guide portion 92 of the heating guide 90. By being guided in the direction of the photograph, it is possible to prevent combustion gas from contacting a portion vulnerable to high-temperature heat, thereby improving durability of the sensible heat panel 41 .

As described above, the present invention is not limited to the above-described embodiments, and modifications obvious to those skilled in the art to which the present invention pertains may be carried out without departing from the technical spirit of the present invention claimed in the claims. It is possible, and such modifications fall within the scope of the present invention.

1: condensing boiler 10: blower
20: burner 30: combustion chamber
40: sensible heat exchanger 41: sensible heat panel
41a: discoloration part 42: water pipe
43: tube 44: electric heating fin
410: sensible heat connection part 411: sensible heat flange part
412: combustion heat inflow prevention projection 50: latent heat heat exchanger
510: latent heat connection 510a: seating groove
511: Latent Heat Flange 512,513: Combustion Heat Inflow Prevention Protrusion
60: condensate receiver 70: exhaust duct
80: packing 90: heating guide
91: curved part 92: guide part
100: combustion heat blocking means

Claims (8)

a sensible heat exchanger 40 for absorbing sensible combustion heat generated in the combustion chamber 30;
a latent heat exchanger (50) for absorbing latent heat of steam included in the combustion gas that has undergone heat exchange in the sensible heat exchanger (40);
A packing 80 provided between the sensible heat connection part 410 and the latent heat connection part 510 to which the sensible heat exchanger 40 and the latent heat exchanger 50 are connected to prevent leakage of combustion gas; and
Combustion heat blocking means 100 for blocking the heat dissipation of the combustion gas from being directly transferred to the packing 80;
Including,
Sensible heat panels 41 forming outer walls are provided on front and rear surfaces of the combustion chamber 30 and the sensible heat exchanger 40,
A plurality of water pipes 42 located outside the sensible heat panel 41 and spaced vertically are provided on the front and rear surfaces of the combustion chamber 30,
The sensible heat exchanger 40 is provided with a plurality of tubes 43 through which a heating medium flows,
On the inner surface of the sensible heat panel 41 located between the water pipe 42 and the tube 43 provided adjacent to the water pipe 42, the combustion gas flows toward the tube 43. A structure for preventing burnout of heat exchanger parts by combustion heat, characterized in that a heating guide 90 is provided to guide and surround the inner surface of the water pipe 42. According to claim 1,
A sensible heat flange part 411 in contact with the upper surface of the packing 80 is formed in the sensible heat connection part 410,
A latent heat flange portion 511 on which the packing 80 is seated is formed on the latent heat connection portion 510,
The combustion heat blocking means 100 is formed by combustion heat including a combustion heat inflow prevention protrusion 512 extending from the inner end of the latent heat flange part 511 to the inner side of the inner end of the sensible heat flange part 411. Burn-out prevention structure of heat exchanger parts. According to claim 1,
A sensible heat flange part 411 in contact with the upper surface of the packing 80 is formed in the sensible heat connection part 410,
A latent heat flange portion 511 on which the packing 80 is seated is formed on the latent heat connection portion 510,
The combustion heat blocking means 100 is formed by combustion heat including a combustion heat inflow prevention protrusion 513 extending from the inner end of the latent heat flange part 511 to contact the lower surface of the inner end of the sensible heat flange part 411. Burn-out prevention structure of heat exchanger parts. According to claim 3,
The combustion heat inflow prevention projection 513 is a structure for preventing burnout of heat exchanger parts by combustion heat, characterized in that in surface contact with the bottom surface of the inner end of the sensible heat flange portion 411. According to claim 1,
A sensible heat flange part 411 in contact with the upper surface of the packing 80 is formed in the sensible heat connection part 410,
A latent heat flange portion 511 on which the packing 80 is seated is formed on the latent heat connection portion 510,
The combustion heat blocking means 100 is a combustion heat blocking means 100, including a combustion heat inflow prevention protrusion 412 bent from the inner end of the sensible heat flange part 411 to contact the upper surface of the inner end of the latent heat flange part 511. Burn-out prevention structure of heat exchanger parts. According to claim 5,
The combustion heat inflow prevention projection 412 is a structure for preventing burnout of heat exchanger parts by combustion heat, characterized in that in surface contact with the upper surface of the inner end of the latent heat flange portion 511. delete According to claim 1,
The heating guide 90 has a curved portion 91 formed in a shape surrounding the inner surface of the water pipe 42, and is formed obliquely extending from the lower end of the curved portion 91 toward the tube 43. A structure for preventing burnout of heat exchanger parts due to combustion heat, characterized in that consisting of a guide portion (92).

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