KR101925312B1 - heat exchanger and boiler comprising the same - Google Patents

Abstract

The present invention relates to a burner heat exchanger assembly and a boiler including the burner heat exchanger assembly. The burner heat exchanger assembly includes a housing having an exhaust port and having an open front and a rear surface, a front cover detachably coupled to the front surface, A burner disposed in the housing and burning a mixture of the supplied fuel gas and air to produce a combustion product; a heat exchanger arranged between the housing and the burner for exchanging heat medium for heat exchange with the combustion product; A pipe, an induction member disposed between the housing and the heat exchange pipe and surrounding the heat exchange pipe at a predetermined interval, the induction member being connected to the front cover and the rear cover, And through the rear cover, the front cover, and the interior of the housing It is connected to the burner and the exchanger and comprises a duct for supplying the gas and air mixture as fuel for the burner.

Description

FIELD OF THE INVENTION The present invention relates to a burner heat exchanger assembly and a boiler comprising the same,

The present invention relates to a burner heat exchanger assembly and a boiler comprising the same.

The boilers used at home are mainly oil boilers, gas boilers, etc. They are installed in boiler room, veranda. In recent years, condensing-type gas boilers have been popularized to maximize thermal efficiency.

The condensing gas boiler generally comprises a case 1a constituting the outer shape of the boiler, a heat exchanger assembly 2a disposed inside the case 1a, a blowing fan 3a, a pump (not shown), a valve , A control unit (not shown), and the like (see FIG. 15).

The heat exchanger assembly 2a includes a housing 21a having an exhaust port 211a and an open front face, a burner 24a disposed inside the housing 21a and generating high temperature combustion products, A heat exchange pipe 25a through which a heating medium used as heating water or hot water to be heated by heat exchange with combustion products flows, a cover 22a coupled to an open portion of the housing 21a and coupled with the burner 24a, ).

The duct (27a) extends downwardly to a predetermined length on the cover (12a). At the end of the duct 27a, a blowing fan 3a for supplying a fuel gas and an air mixture through a duct 27a is connected. The ventilation fan 3a is directly connected to the duct 27a so that the duct 27a has to protrude to a predetermined length from the surface of the cover 22a in accordance with the air supply mechanism 32a of the blowing fan 3a.

The blowing fan 3a is positioned under the cover 12a and connected to the duct 27a so that the outer surface of the blowing fan 3a protrudes more than the duct 27a with respect to the outer surface of the cover 22a. The width W1 of the case 1a was increased by the protruding portion of the blowing fan 3a. Therefore, the space of the boiler room and the veranda where the boiler is installed is narrowed.

16, in order to minimize the width of the case 1a, the blowing fan 3a is disposed below the housing 21a so that the air supply mechanism 32a faces the front of the case 1a. 27a. The outer surface of the blowing fan 3a is not projected more than the duct 27a with respect to the outer surface of the cover 22a. However, since the air supply mechanism 32a of the air blowing fan 3a faces the front surface of the case 1a, disassembly and connection between the duct 27a and the blowing fan 3a are inconvenient.

Registration No. 10-0575187 (Apr. 24, 2006)

The present invention provides a technique for making a boiler slimmer.

The present invention provides a technique for allowing a mixture of discharged combustion products and a gas for fuel supplied to a burner to be heat-exchanged.

A burner heat exchanger assembly according to an embodiment of the present invention includes a burner for burning a mixture of a fuel gas and air to generate a combustion product, a heat exchanger for exchanging heat with the heating medium passing through the combustion product, And a housing having a pipe, a burner, and a housing surrounding the heat exchange pipe and having an exhaust port through which the combustion products are exhausted, the exhaust passage being connected to the heat exchange pipe, Wherein a mixture of the fuel gas and air is supplied to the burner after passing through the air supply and exhaust heat exchanger, and the mixture of the combustion gas and the air is heat- The combustion products passing through the heat exchanger are discharged to the exhaust port.

A burner heat exchanger assembly according to an embodiment of the present invention includes a housing having an exhaust port and having front and rear openings, a front cover detachably coupled to the front surface, a rear cover detachably coupled to the rear surface, A heat exchanger pipe disposed in the housing and disposed between the housing and the burner and through which a heat medium for heat exchange with the combustion product flows, a burner for burning a mixture of fuel gas and air to be supplied to generate combustion products, An induction member which is disposed between the housing and the heat exchange pipe and surrounds the heat exchange pipe with a predetermined gap therebetween, the induction member being connected to the front cover and the rear cover and having an opening portion through which the combustion products are discharged, A rear cover, the front cover, and the inside of the housing and connected to the burner And it includes parts of a duct for supplying the gas and air mixture as fuel for the burner.

The duct section includes a rear duct vertically extending from the rear cover to a lower side and connected to the blowing fan, a rear duct having a rear duct, a front duct having a front duct connected to the burner, And a lower duct having a lower flow path connecting the rear flow passage and the front flow passage, wherein the fuel gas and the air mixture supplied through the blowing fan are supplied to the burner through the rear flow passage, the lower flow passage, .

The heat exchanger may further include a duct cover having an open portion and coupled to the open portion.

When the heat exchange pipe is divided into the upper side and the lower side with respect to the imaginary horizontal center, the opening portion of the guide member is located on the lower side and the lower duct can be separated from both ends of the guide member constituting the opening portion.

The duct section includes a rear duct vertically extending from the rear cover to a lower side and connected to the blowing fan, a rear duct having a rear duct, a front duct having a front duct connected to the burner, Wherein the air supply and exhaust heat exchanger is connected to an end of the guide member forming the opening, and the combustion products pass through the air supply and exhaust heat exchanger The fuel gas and air flowing inside the air supply / discharge heat exchanger can be preheated by heat exchange with the combustion products.

The air supply / exhaust heat exchanger includes a plurality of tubes having therein a mixture flow path for connecting the rear flow path and the front flow path, wherein the plurality of tubes are arranged in one direction and are disposed at one side and the other side Wherein a tube is connected to the induction member and a combustion flow path through which the combustion products passing through the heat exchange pipe pass through for heat exchange with the mixture of fuel gas and air is formed between adjacent tubes, And the flow path is not connected to the rear flow path and the front flow path.

The air supply mechanism of the air blowing fan may be disposed to face the rear cover.

A boiler according to an embodiment of the present invention includes a heat exchanger as described above, a case in which the heat exchanger is disposed and a case disposed inside the case and connected to a duct portion of the heat exchanger, And a blowing fan for supplying a mixture of the fuel gas and the air.

According to the embodiment of the present invention, since the supply mechanism of the blowing fan is connected to the rear duct, the degree of protrusion of the front duct from the front cover can be minimized, and the blower fan can be moved to the front The degree of protrusion can be minimized and the case can be made slimmer.

According to the embodiment of the present invention, the combustion products of the induction space can be introduced into the exhaust space through the interspace. As the combustion products pass through the interspace, the mixture of the combustion products and the fuel gas and air can be heat exchanged. Since the combustion products are hot, a mixture of fuel gas and air can be preheated. Since the preheated fuel gas and air mixture is supplied to the burner, the combustion efficiency of the fuel gas and air mixture can be increased.

1 is a schematic view of a boiler according to an embodiment of the present invention;
2 is a perspective view of the burner heat exchanger assembly of FIG. 1 and the blower fan.
Fig. 3 is a sectional view taken along line III-III of Fig. 2; Fig.
4 is a perspective view showing the housing of FIG. 2 separated from the front cover.
Figure 5 is an exploded perspective view of Figure 3;
Fig. 6 is a front view of the housing, heat exchange pipe, induction member and burner of Fig. 4; Fig.
7 is a perspective view of the outer surface of the rear cover of Fig.
8 is a perspective view of the outer surface of the front cover of Fig.
9 is an exploded perspective view of a burner heat exchanger assembly according to another embodiment of the present invention.
10 is an enlarged view of the lower duct portion of Fig.
11 is a perspective view showing a connection state between a rear flow path and a lower flow path.
12 is a perspective view of the outer surface of the front cover of Fig.
13 is a front view of the housing, the heat exchange pipe and the burner of Fig.
Figure 14 is a schematic diagram illustrating the interior of a burner heat exchanger assembly in accordance with another embodiment of the present invention.
FIG. 15 and FIG. 16 are schematic views showing a coupling structure of a conventional heat exchanger and a blowing fan. FIG.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Like parts are designated with like reference numerals throughout the specification.

A burner heat exchanger assembly according to an embodiment of the present invention may be applied to a boiler, which is an embodiment of the present invention, and will be described below with reference to a boiler to which a burner heat exchanger assembly is applied.

A boiler according to an embodiment of the present invention will now be described with reference to FIG.

1 is a schematic view showing a boiler according to an embodiment of the present invention.

Referring to FIG. 1, the boiler 100 includes a case 1, a burner heat exchanger assembly 2, and a blower fan 3.

The case 1 forms the entire outer shape of the boiler and has a front surface opened and has a mounting surface 11 provided therein. A cover 12 is detachably coupled to the front surface of the case 1. Holes (not shown) are formed on the upper surface and the lower surface of the case 1, and the number of the holes may vary depending on the components disposed inside the case 1. [

The case 1 may be installed in a state where the rear surface faces a wall of a boiler room, a veranda, or the like, and protrudes from the wall by a predetermined distance L during installation.

Next, the burner heat exchanger assembly 2 and the blowing fan 3 will be described with reference to Figs. 2 to 8. Fig.

FIG. 2 is a perspective view of the burner heat exchanger assembly and the blower fan of FIG. 1, FIG. 3 is a cross-sectional view taken along line III-III of FIG. 2, FIG. 4 is a perspective view of the housing of FIG. Fig. 5 is an exploded perspective view of Fig. 3, Fig. 6 is a front view of a housing, a heat exchange pipe, an induction member and a burner of Fig. 4, Fig. 7 is an external perspective view of a rear cover of Fig. External surface perspective view.

2 to 5, the burner heat exchanger assembly 2 includes a housing 21, a front cover 22, a rear cover 23, a burner 24, a heat exchange pipe 25, (See FIG. 1), which is located inside the case 1 and includes the duct portion 26 and the duct portion 27. The burner heat exchanger assembly 2 allows heat exchange with hot combustion products and heating mediums used as heating water or hot water.

The housing 21 is disposed inside the case 1 in a state where it forms an outer shape of the burner heat exchanger assembly 2. The inside of the housing 21 penetrates from the front side to the rear side. An exhaust port 212 connected to the inside is formed on an upper side of the housing 21 and an exhaust port 212 is connected to a hole formed on the upper surface of the case 1. [

A first port 213 is formed on one side of the lower surface of the housing 21, and a second port 214 is formed on the other side. The first port 213 and the second port 214 pass through the lower surface of the housing 21. Further, a condensed water discharge port (not shown) through which condensed water is discharged is formed at the lower center of the housing 21.

The bottom surface of the housing 21 between the first port 213 and the second port 214 protrudes downward. A duct space 215 connected to the inside of the housing 21 is formed in the lower portion of the housing 21 by the protruded portion.

The front cover 22 is detachably coupled to the front surface of the housing 21 and the rear cover 23 is detachably coupled to the rear surface of the housing 21. The front and rear openings of the housing 21 are closed by the front cover 22 and the rear cover 23. The front cover 22 is positioned at the front portion of the case 1 and the rear cover 23 faces the mounting surface 11 of the case 1 (see FIG. 1).

The burner 24 burns a mixture of fuel gas and air supplied from the outside to generate a high-temperature combustion product. Since the burner configuration applied to the known heat exchanger can be applied to the burner 24, a detailed description of the structure is omitted.

On the other hand, around the burner 24, there are disposed an igniter (not shown) for igniting the mixture of the fuel gas and air, and a sensor (not shown) for measuring the combustion oil portion of the mixture of the fuel gas and air .

The heat exchange pipe 25 is disposed along the outer circumference of the burner 24 and a combustion space 215c is formed between the heat exchange pipe 25 and the burner 24 to generate combustion products.

The heat exchange pipe 25 is formed by stacking a plurality of loop-shaped sleeves 251 having an annular shape as viewed from the front in the direction from the rear cover 23 toward the front cover 22. A gap is formed between the adjacent loop type sleeves 251 so that the combustion products in the combustion space 215c can pass through the gap between the loop type sleeves 251. [

The inside of the loop type sleeves 251 are connected to each other and an inlet 251a through which the heating medium flows into the loop type sleeve 251 is formed. The inlet 251a is exposed through the first port 213 to the outside of the housing 21.

The other side loop type sleeve 251 is formed with an outlet 251b through which the heating medium flows through the inlet 251a and flows therethrough while being heat-exchanged with the combustion products to discharge the heated heating medium. The portion of the outlet 251b passes through the second port 214 and is exposed to the outside of the housing 21 (see FIG. 6).

3, the front surface of the heat exchange pipe 25 is in contact with the front cover 22, and the rear surface is in contact with the rear cover 23. There is no gap between the heat exchange pipe 25 and the front cover 22 and between the heat exchange pipe 25 and the rear cover 23 to allow the combustion products to pass through. The combustion products in the combustion space 215c can pass through the clearance of the adjacent loop-like sleeve 251 only.

The induction member 26 is disposed between the outer circumference of the heat exchange pipe 25 and the inner circumference of the housing 21 at an interval. The inlet 251a and the outlet 251b pass through the lower surface of the guide member 26 and then through the first port 213 and the second port 214. [

An exhaust space 217 connected to the exhaust port 212 is formed between the induction member 26 and the housing 21 by the arrangement of the induction member 26. A loop 217 is formed between the induction member 26 and the heat exchange pipe 25, Shaped sleeve 251 and a guide space 216 into which the combustion products having passed through the sleeve 251 are introduced.

The front surface of the guide member 26 is in contact with the front cover 22 and the rear surface is connected with the rear cover 23 to be formed integrally. When the guide member 26 is divided into the upper side and the lower side with respect to the imaginary horizontal center 262, an opening portion 261 is formed at least at a lower side.

The open portion 261 connects the guide space 216 and the exhaust space 217 and the combustion products of the guide space 216 can be introduced into the exhaust space 217 through the open portion 261. [ Some of the combustion products may flow into the duct space 215 and then be exhausted through the exhaust space 217.

The combustion products passing through the upper portion of the heat exchange pipe 25 can not be discharged directly to the exhaust port 212 by the induction member 26 but are moved along the induction space 216 and are then discharged through the opening portion 261 And then flows into the exhaust space 217. Since the combustion products are clogged by the induction member 26, the combustion products moving to the upper side are stagnated and resistance develops. However, the lower side of the heat exchange pipe 25 adjacent to the opening portion 261 is smaller in resistance than the upper side. Therefore, the high-temperature combustion products in the combustion space 215c pass through the lower portion of the heat exchange pipe 25 having lower resistance than the upper side, then flow into the exhaust space 217 and are discharged to the exhaust port 212. [

So that the combustion products generated in the combustion space 215c do not pass through only the upper side portion of the heat exchange pipe 25 but also pass through the lower side portion having lower resistance than the upper side. The combustion products in the combustion space 215c pass through the heat exchange pipe 25 as a whole, so that the thermal efficiency of the combustion products and the heat medium can be increased.

3, the duct portion 27 includes a rear duct 271, a front duct 272, and a lower duct 273, and a fuel gas and air mixture can be supplied to the burner 24.

The rear duct 271 extends vertically from the rear cover 23 to the lower side and a rear flow passage 271a is formed therein. At least a part of the rear cover 23 is provided with an inspection window 231 (see FIG. 7) for confirming the rear flow path 271a.

The front duct 272 is vertically protruded vertically from the center of the front cover 22 and has a front flow passage 272a connected to the inside of the burner 24. A duct cover 272b is detachably coupled to the front duct 272 and the front flow path 272a and the burner 24 can be inspected when the duct cover 272b is removed (see FIG. 8).

3 to 6, the lower duct 273 is located inside the housing 21 and is disposed in the duct space 215. A lower flow path 273a connecting the rear flow path 271a and the front flow path 272a is formed in the lower duct 273. The combustion products flowing into the duct space 215 can be in contact with the outer circumference of the lower duct 273.

Referring again to FIG. 3, the blowing fan 3 is located inside the case 1 and disposed on the lower side of the housing 21. As shown in FIG. The blowing fan 3 has an inlet 31 and a feeder 32 and is disposed so as to face the rear cover 23 of the feeder 32 and detachably connected to the rear duct 271. The blowing fan (3) feeds the fuel gas and air mixture into the duct portion (27). The fuel gas and air mixture can be supplied into the burner 24 through the rear flow path 271a, the lower flow path 273a, and the front flow path 272a. Air and fuel can be burned through the burner 24.

Since the air supply mechanism 32 of the blowing fan 3 is connected to the rear duct 271, the degree of protrusion of the front duct 272 from the front cover 22 can be minimized and the burner heat exchanger assembly 2 can be mounted on the side The degree to which the blowing fan 3 leaves the housing 21 can be minimized and the case 1 can be made slimmer (see FIG. 1).

In addition, the air supply mechanism 32 of the air blowing fan 3 faces the rear duct 271, so that the blowing fan 3 and the rear duct 271 can be easily separated from each other.

Next, another embodiment of the heat exchanger will be described with reference to Figs. 9 to 13. Fig.

FIG. 9 is an exploded perspective view showing a heat exchanger according to another embodiment of the present invention, FIG. 10 is an enlarged view of a lower duct portion of FIG. 9, and FIG. 11 is a perspective view showing a connection state of a rear flow passage and a lower flow passage FIG. 12 is a perspective view of the outer surface of the front cover of FIG. 9, and FIG. 13 is a front view of the housing, the heat exchange pipe, and the burner of FIG.

9 to 13, the burner heat exchanger assembly 2 according to the present embodiment includes a housing 21, a front cover 22, a rear cover 23, a burner 24, a heat exchange pipe 25, An induction member 26, and a duct portion 27. The housing 21, the front cover 22, the rear cover 23, the burner 24, the heat exchange pipe 25 and the induction member 26 are housed in the housing according to the embodiment of Figs. 1 to 8, The rear cover, the burner, the heat exchange pipe, and the guide member, so duplicate descriptions are omitted.

The duct portion 27 according to the present embodiment includes a rear duct 271 having a rear flow passage 271a connected to the blowing fan 3, a front duct 272 having a front flow passage 272a connected to the burner 24, And an air supply and exhaust heat exchanger 274 located in the duct space 215 and having a mixture flow passage 274a and a combustible flow passage 274b. The rear duct 271 and the front duct 272 have the same construction and function as those of the rear duct and the front duct according to the embodiment of FIGS. 1 to 8, and thus duplicate descriptions are omitted.

The air supply and exhaust heat exchanger 274 is formed by arranging a plurality of tubes 274c formed in the inner longitudinal direction of the mixture flow passage 274a at intervals in one direction in the duct space 215. One tube 274c and the other tube 274c are connected to the end of the guide member 26 forming the opening 261. [ The combustible flow passage 274b is formed between adjacent tubes 274c.

The mixture flow path 274a connects the rear flow path 271a and the front flow path 272a. The mixture of fuel gas and air supplied from the blowing fan 3 flows through the rear flow path 271a, the mixture flow path 274a and the front flow path 272a and can be supplied to the burner 24. [

The combustible flow passage 274b connects the induction space 216 and the exhaust space 217. So that the combustion products of the induction space 216 can flow into the exhaust space 217 through the combustion flow path 274b. In addition, since the combustible flow passage 274b is not connected to the rear flow passage 271a and the front flow passage 272a, the combustion products of the combustion flow passage 274b do not flow into the rear flow passage 271a or the front flow passage 272a .

And can be heat-exchanged with a mixture of the fuel gas and air when the combustion products pass through the combustible flow passage 274b. Since the combustion products are hot, the temperature of the mixture of fuel gas and air can rise. Thus, a mixture of the fuel gas and air can be preheated. The mixture of the preheated fuel gas and air is supplied to the burner 24, so that the combustion efficiency can be increased.

In other respects, the configuration of the embodiment of FIGS. 1 to 8 may be applied as it is.

14, a burner heat exchanger assembly according to another embodiment of the present invention includes a burner 24 for burning a mixture of fuel gas and air to generate a combustion product, a heating medium A heat exchange pipe 25 for heat exchange with the burner 24 and the heat exchange pipe 25 and an injection port 275 for injecting a mixture of fuel gas and air and a combustion product And a housing (21) having an exhaust port (212) for exhausting the combustion gas, wherein a combustion product passing through the heat exchange pipe (25) and a mixture of fuel gas and air Exchanger 274 for preheating the mixture of the fuel gas and the air is disposed in the exhaust gas heat exchanger 274. The mixture of the preheated fuel gas and air is supplied to the burner 24 and the air-Excessive combustion products is discharged to the exhaust port 212.

A mixture flow path 274a through which a mixture of fuel gas and air flows and a combustible flow path 274b through which combustion products flow are formed in the air supply and exhaust heat exchanger 274.

In other respects, the configurations of the embodiments of Figs. 1 to 13 may be applied as they are.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, Of the right.

100: Boiler 1: Case
11: Mounting surface 12: Cover
2: burner heat exchanger assembly 21: housing
211: Arrangement space 212: Exhaust port
213: first port 214: second port
215: duct space 216: guidance space
217: exhaust space 22: front cover
23: Rear cover 231: Inspection window
24: burner 25: heat exchange pipe
251: Loop type sleeve 251a: Inlet
251b: Outflow port 215c: Combustion space
26: guide member 261:
262: virtual horizontal center 27: duct part
271: rear duct 271a: rear duct
272: front duct 272a: front duct
273: Lower duct 273a: Lower duct
273b: Said space 274: Air exhaust heat exchanger
274a: Mixture flow channel 274b: Combustion flow channel
274c: tube
3: blowing fan 31: intake port
32: Supply mechanism L: Distance

Claims (9)

delete A housing having an exhaust port and having a front surface and a rear surface opened,
A front cover detachably coupled to the front surface,
A rear cover detachably coupled to the rear surface,
A burner disposed inside the housing for burning a mixture of supplied fuel gas and air to produce a combustion product,
A heat exchange pipe disposed between the housing and the burner and through which the combustion product flows and a heat medium which exchanges heat with the combustion product flows,
An induction member disposed between the housing and the heat exchange pipe and surrounding the heat exchange pipe at a predetermined interval, the induction member being connected to the front cover and the rear cover,
A duct cover which is connected to the burner and passes through the rear cover, the front cover, and the housing to supply fuel gas and an air mixture to the burner,
/ RTI >
The duct portion
A rear duct vertically extending from the rear cover to a lower side and capable of being coupled with a blowing fan, a rear duct having a rear duct, a front duct having a front duct connected to the burner, And an air supply and exhaust heat exchanger connecting the front flow path,
Wherein the supply and exhaust heat exchanger is connected to an end of the guide member forming the opening and the combustion product passes through the air supply and exhaust heat exchanger and a mixture of the fuel gas and air flowing in the air supply and exhaust heat exchanger flows into the combustion Preheated by heat exchange with the product
Burner heat exchanger assembly. delete 3. The method of claim 2,
Wherein the front duct further comprises a duct cover having an opening and coupled to the opening. delete delete 3. The method of claim 2,
The air supply / exhaust heat exchanger includes:
And a plurality of tubes having therein a mixture flow path for connecting the rear flow path and the front flow path, wherein the plurality of tubes are arranged in one direction, and a tube disposed at one side and the other side of the arrangement direction is connected to the induction member And a combustible flow passage through which the combustion products passing through the heat exchange pipe pass is formed between the neighboring tubes, and the combustible flow passage is not connected to the rear passage and the front passage
Burner heat exchanger assembly. 3. The method of claim 2,
And the air supply mechanism of the blowing fan is arranged to face the rear cover. A burner heat exchanger assembly defined in any one of claims 2, 4, 7, and 8,
A case in which the burner heat exchanger assembly is disposed and
A blower fan disposed in the case and connected to a duct portion of the burner heat exchanger assembly for supplying fuel gas and air mixture to the burner of the burner heat exchanger assembly;
.

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