JP2021055978A - Combustion device - Google Patents

Abstract

To provide a combustion device which prevents the generation of the contamination and a color change of a surface of a box body, and does not spoil its beauty.SOLUTION: A combustion device comprises a burner accommodated in a box body, and heating a heated fluid, an exhaust port 5 located above the box body, and discharging a combustion gas generated by the burner, and windbreak means having a front wall 20 for covering a front part of the exhaust port 5 at a front face of the exhaust port 5, and opened at upper and lower faces. Rectification means for regulating a flow direction of the combustion gas discharged from the exhaust port 5 is arranged between the exhaust port 5 and the windbreak means, and the rectification means has a dogleg-shaped guide plate for guiding the combustion gas discharged from the exhaust port 5 to an oblique front upper part and an oblique front lower part. An extension line L1 of a plate part forming a dogleg shape of the guide plate is formed into a shape which is not overlapped on the front wall 20 of the windbreak means, the rectification means has an upper hangout plate 25 and a lower hangout plate 26 which hang out toward a front part at the exhaust port 5 and upper/lower parts of the guide plate, and a length of the lower hangout plate 26 is set longer than a length of the upper hangout plate 25.SELECTED DRAWING: Figure 6

Description

The present invention relates to a combustion device in which a windbreaker is attached to the front surface of an exhaust port.

Conventionally, in this type of thing, a combustor housed in the housing to heat the fluid to be heated, an exhaust port located on the upper part of the front plate constituting the housing and discharging the combustion gas generated by the combustor to the outside, and exhaust In a combustion device in which the mouth faces a hole formed in the upper part of the front plate constituting the housing and the combustion exhaust is discharged to the outside from the exhaust port, the exhaust port is the upper part of the front plate constituting the housing. A windbreaker is provided on the front side of the exhaust port in a combustion device that discharges combustion exhaust to the outside from the exhaust port so as to face the hole formed in the above, and faces the exhaust port from the front side of the exhaust port during combustion. Even when the wind blows, there is a combustion device that prevents the wind, prevents the wind pressure applied to the exhaust port from becoming high, and prevents problems such as incomplete combustion and misfire. (See, for example, Patent Document 1.)

Japanese Unexamined Patent Publication No. 2016-133246

By the way, in this conventional type, the combustion gas discharged from the exhaust port during combustion bounces off the windbreaker, flows to the housing side of the combustion device, hits the housing surface, and is located above and below the exhaust port. The surface of the housing may become dirty due to soot contained in the combustion gas, or discoloration may occur due to the heat of the combustion gas, which may spoil the aesthetic appearance. The front plate located below the exhaust port has a larger range of contact with the combustion gas that bounces off the windbreaker than above the exhaust port, and the above-mentioned stains and discoloration in that part are regarded as a problem. ..

In order to solve the above problems, in the first aspect of the present invention, a combustor housed in a housing to heat a fluid to be heated and a combustion gas located in the upper part of the housing and generated by the combustor are discharged to the outside. In a combustion device provided with an exhaust port to be operated and a windbreak means having a front wall covering the front of the exhaust port and having open upper and lower surfaces on the front surface of the exhaust port, between the exhaust port and the windbreak means. Is provided with a rectifying means for defining the flow direction of the combustion gas discharged from the exhaust port, and the rectifying means guides the combustion gas discharged from the exhaust port diagonally forward and upward and diagonally forward and downward in a dogleg shape. The guide plate has a shape in which the extension line of the plate portion forming the dogleg shape of the guide plate does not overlap the front wall of the windbreak means, and the rectifying means has the exhaust port and the guide plate. It has an upper overhang plate that projects forward, and a lower overhang plate that projects forward below the exhaust port and the guide plate, and the length of the lower overhang plate. The length was set to be longer than the length of the overhanging plate.

Further, in claim 2, the guide plate has an upward inclined plate extending diagonally forward and upward and a downwardly inclined plate extending diagonally forward and downward as the plate portion forming the dogleg shape. The tip position of the overhanging plate is positioned on the same vertical plane as the tip of the upper inclined plate, or the overhanging plate does not overlap the extension line of the upper inclined plate, and the tip of the upper inclined plate is not overlapped. The position is set in front of the position on the same vertical plane as the above, and the tip position of the underhanging plate is set so that the underhanging plate does not overlap the extension line of the lower inclined plate, and the overhanging plate is formed. The position is set to be in front of the position on the same vertical plane as the tip position.

Further, in claim 3, the tip position of the overhanging plate may be positioned on the same vertical plane as the tip of the overhanging plate, or the overhanging plate may overlap the extension line of the overhanging plate. When a first diagonal line forming an angle substantially the same as the angle formed by the upper inclined plate with respect to the same vertical plane as the opening surface of the exhaust port is extended forward from the upper end of the exhaust port, the first diagonal line is on the first diagonal line. The position is set in front of the position on the same vertical plane as the tip of the upper inclined plate, and the tip position of the lower overhang plate is set so that the lower inclined plate has the same vertical plane as the opening surface of the exhaust port. When the second diagonal line forming substantially the same angle as the plumb bob is extended forward from the lower end of the exhaust port, the lower overhang plate is in front of the position where the second diagonal line and the underhang plate intersect. Does not overlap the extension line of the downward inclined plate, and is set to a position in front of the position on the same vertical plane as the tip position of the overhanging plate.

According to claim 1 of the present invention, the rectifying means has a dogleg-shaped guide plate that guides the combustion gas discharged from the exhaust port diagonally forward and upward and diagonally forward and downward, and the dogleg of the guide plate is formed. Since the extension line of the plate to be formed does not overlap the front wall of the windbreak means, the guide plate diagonally prevents the flow of combustion gas discharged from the exhaust port from facing the front wall of the windbreak means. Since it can be oriented diagonally forward and downward, the combustion gas discharged from the exhaust port bounces off the front wall of the windbreak means, flows to the housing side of the combustion device, and is located above and below the exhaust port. It is possible to prevent problems such as the body surface becoming dirty due to soot contained in the combustion gas or discoloration due to the heat of the combustion gas, and the appearance is not spoiled.

Further, the rectifying means has an upper overhang plate protruding forward above the exhaust port and the guide plate, and a lower overhang plate protruding forward below the exhaust port and the guide plate. As a result, it is possible to prevent the flow of combustion gas that comes out of the exhaust port and tries to flow directly upward, or the flow of combustion gas that comes out of the exhaust port and tries to flow directly below, so that it can be prevented from flowing from the exhaust port. There is no flow of combustion gas that goes out and rises along the surface of the housing, or there is no flow of combustion gas that goes out from the exhaust port and descends along the surface of the housing, and the surface of the housing located above and below the exhaust port It is possible to prevent problems such as stains due to soot contained in the exhaust gas or discoloration due to the heat of the exhaust gas, and the appearance is not spoiled.

Moreover, by making the length of the lower overhang plate longer than the length of the upper overhang plate, the opening area of the lower surface opening formed between the exhaust port and the windbreak means is larger than the opening area of the upper surface opening. As it becomes smaller, the amount of combustion gas discharged from the lower surface opening is smaller than the amount of combustion gas discharged from the upper surface opening, and it is discharged from the lower surface opening than the outlet position of the combustion gas discharged from the upper surface opening. Since the outlet position of the combustion gas is farther from the housing, even if the area of the housing located below the exhaust port is larger than above the exhaust port, it is difficult for the combustion gas to hit and it is closer to the exhaust port. It is possible to prevent problems such as the surface of the housing located below being soiled by soot contained in the exhaust gas or discoloration due to the heat of the exhaust gas, and the appearance is not spoiled.

Further, according to claim 2, the guide plate has an upward inclined plate extending diagonally forward and upward and a downward inclined plate extending diagonally forward and downward as a plate portion forming a dogleg shape, and is stretched. By setting the tip position of the protruding plate to a position on the same vertical plane as the tip of the upper inclined plate or a position on the same vertical plane as the tip of the upper inclined plate, the overhanging plate burns. Prevents rainwater, etc. that falls from above the device from dripping on the upper inclined plate of the guide plate, reliably suppresses the ingress of rainwater, etc. into the exhaust port, and of the combustion gas toward the front wall side of the windbreak means. Combustion gas can be smoothly discharged to the outside without forming a strong flow, and the tip position of the underhanging plate does not overlap with the extension line of the downwardly inclined plate. In addition, by setting the position in front of the position on the same vertical plane as the tip position of the upper overhang plate, the lower overhang plate strengthens the flow of combustion gas toward the front wall side of the windbreak means. It is possible to smoothly discharge the combustion gas to the outside without forming it.

Further, according to claim 3, the tip position of the overhanging plate is positioned on the same vertical plane as the tip of the upper inclined plate, or the upper overhanging plate does not overlap the extension line of the upper inclined plate and is above. When the first diagonal line, which forms an angle approximately the same as the angle formed by the inclined plate with respect to the same vertical plane as the opening surface of the exhaust port, is extended from the upper end of the exhaust port to the front side, the first oblique line is on the upper inclined plate. By setting the position in front of the position on the same vertical plane as the tip, the overhanging plate hardly becomes an exhaust resistance that obstructs the flow of combustion gas diagonally forward and upward, and the front wall of the windbreak means. It is possible to smoothly discharge the combustion gas to the outside without forming a strong flow of the combustion gas toward the side.

In claim 3, further, a second diagonal line is formed forward from the lower end of the exhaust port so that the tip position of the underhanging plate is substantially the same angle as the angle formed by the lower inclined plate with respect to the same vertical plane as the opening surface of the exhaust port. When extended to the side, the lower overhang plate does not overlap the extension line of the lower overhang plate, and the tip position of the upper overhang plate is in front of the position where the second diagonal line and the lower overhang plate intersect. The position is in front of the position on the same vertical plane as. Then, as the flow of the combustion gas toward the lower surface opening, there are two flows, one flowing downward along the lower inclined plate at substantially the same inclination angle as the lower inclined plate and the other flowing along the lower overhanging plate. To do. Therefore, the flow direction of the combustion gas discharged from the lower surface opening side is a combined direction of the above two flow directions, and is an inclination angle closer to horizontal than the inclination angle of the lower inclined plate.

Since the lower surface opening is narrower than the upper surface opening, the flow velocity of the combustion gas when passing through the opening portion of the lower surface opening is faster than the flow velocity of the combustion gas when passing through the opening portion of the upper surface opening. The combustion gas from the bottom opening is vigorously discharged in the direction away from the housing at a horizontal inclination angle. As a result, even if the exhaust port is located at the upper part of the housing and the area of the housing located below the exhaust port is large, the combustion gas does not hit the portion and the housing is located below the exhaust port. It is possible to prevent problems such as the surface being soiled by soot contained in the combustion gas or discoloration due to the heat of the combustion gas, and the appearance is not spoiled.

The perspective view which shows the combustion apparatus of one Embodiment of this invention. The main part exploded perspective view of the combustion apparatus of the same embodiment. The schematic block diagram which shows the hot water heating system using the combustion apparatus of the same embodiment. A perspective view showing a windbreaker. (A) A perspective view showing a rectifier. (B) Vertical sectional view of the rectifier. The cross-sectional enlarged view of the main part of the combustion apparatus of the same embodiment. The figure explaining the flow of the combustion gas discharged to the outside from the main part of the combustion apparatus of the same embodiment.

Next, the combustion apparatus according to the embodiment of the present invention will be described with reference to the drawings. In this embodiment, the case where the combustion device is used in the hot water heating system is described.

Reference numeral 1 denotes an outdoor-installed combustion device of the present embodiment, 2 is a housing of the combustion device 1, and 3 is a combustor housed in the housing 2 to heat the fluid to be heated.

The housing 2 is composed of a front plate 2a, a top plate 2b, a side plate 2c, and a bottom plate 2d, and a hole 4 is formed at a position above the front plate 2a, and an exhaust port of the combustor 3 is formed. The combustion gas generated by the combustor 3 is discharged to the outside through the exhaust port 5 with the 5 facing the hole 4. An air supply port (not shown) for taking in air into the combustion device 1 is provided at an appropriate position on the housing 2, for example, the side plate 2c.

The combustor 3 includes a burner 7 that receives the supply of combustion air from the blower fan 6 to burn fuel, and water that recovers sensible heat from the combustion gas generated by the combustion of the burner 7 and flows through the heat receiving tube 8. A fin tube type heat exchanger 9 that heats a liquid to be heated such as an antifreeze liquid, an exhaust collecting chamber 10 through which combustion gas passes after passing through the heat exchanger 9, and a combustion gas that has passed through the exhaust collecting chamber 10. The exhaust port 5 has an exhaust port 5 for discharging the fuel to the outside, and the exhaust port 5 as an opening formed at the most downstream of the combustion gas flow direction of the exhaust unit 11 is the exhaust port of the combustor 3. It corresponds to 5.

Reference numeral 12 is a heat radiation terminal such as a floor heating panel or a panel convector that heats the space to be air-conditioned, and 13 is a connection between the heat radiation terminal 12 and the water inlet side of the heat receiving tube 8 to receive the heated fluid returned from the heat radiation terminal 12. The return tube 14 leading to the heat tube 8 connects the heat radiating terminal 12 and the water outlet side of the heat receiving tube 8 and guides the heated fluid heated by the heat exchanger 9 to the heat radiating terminal 12. A circulation pump provided is provided to circulate the heated fluid heated by the heat exchanger 9 to the heat radiating terminal 12, and 16 is a gas-water separator provided in the going pipe 14 to separate air and liquid in the heated fluid.

17 is attached to the exhaust portion 11 on the surface where the exhaust port 5 is formed so as to be located on the front side of the exhaust port 5, in order to prevent the wind blowing from the front side of the exhaust port 5 toward the exhaust port 5. As shown in FIG. 4, the windbreaker 17 covers the left side of the exhaust port 5 in the left-right width direction and has a left wall 18 having a mounting surface for the exhaust portion 11. It has a right side wall 19 that covers the right side of the exhaust port 5 in the left-right width direction and has a mounting surface to the exhaust portion 11, and a front wall 20 that covers the front of the exhaust port 5, and the left side wall 18 and the front wall 20 are curved. The right side wall 19 and the front wall 20 are also connected via the curved corner part, and the left side wall 18, the right side wall 19 and the front wall 20 are integrally formed, and the upper and lower surfaces are opened. It has a substantially U-shape, and when the windbreaker 17 is attached to the exhaust unit 11, the front wall 20 of the windbreaker 17 is positioned so as to face the exhaust port 5 at a predetermined distance. However, a space is formed between the exhaust port 5 and the front wall 20 of the windbreak plate 17, and the upper and lower surfaces are opened. The length of the windbreaker 17 in the vertical direction (the length from the lower end to the upper end of the windbreaker 17) is longer than the length of the exhaust port 5 (the length from the lower end to the upper end of the exhaust port 5). When the windbreaker 17 is attached to the front surface of the exhaust port 5, the lower end of the windbreaker 17 is located below the lower end of the exhaust port 5, and the upper end of the windbreaker 17 is located below the upper end of the exhaust port 5. Is also located above.

21 is provided between the exhaust port 5 and the windbreaker 17 in the exhaust direction of the combustion gas, and is attached to the exhaust portion 11 on the surface where the exhaust port 5 is formed so as to be located on the front side of the exhaust port 5. , A rectifying tool as a rectifying means for defining the flow direction of the combustion gas discharged to the outside from the exhaust port 5, and as shown in FIG. 5, the rectifying tool 21 is provided on the front wall 20 side of the windbreaker 17. It extends diagonally forward and upward toward and diagonally forward and downward toward the upper inclined plate 22 and the front wall 20 side of the windbreaker 17 which guides the combustion gas from the exhaust port 5 diagonally forward and upward. It is composed of a downward inclined plate 23 that guides the combustion gas diagonally forward and downward, and has a dogleg-shaped vertical cross-sectional shape that guides the combustion gas discharged from the exhaust port 5 to the outside (see FIG. 5 (b)). ) Is provided.

Further, the straightening tool 21 is provided with a wind removing tool from the exhaust portion 11 on the surface above the exhaust port 5 and the guide plate 24 on which the exhaust port 5 is formed toward the front wall 20 of the wind removing tool 17. Wind removal from the overhanging plate 25 extending substantially horizontally along the substantially upper end of 17 and the exhaust portion 11 on the surface below the exhaust port 5 and the guide plate 24 on which the exhaust port 5 is formed. An underhanging plate 26 that extends substantially horizontally along the substantially lower end of the windbreaker 17 is provided toward the front wall 20 of the tool 17. The windbreaker 17 and the rectifier 21 may be fixed to the exhaust portion 11 by screwing, for example, or may be fixed by other methods such as welding.

The overhanging plate 25 is projected so that its tip 25a is located in front of the tip 22a of the upper inclined plate 22 of the guide plate 24 in a side view. The underhanging plate 26 projects so that its tip 26a is located in front of the tip 23a of the lower inclined plate 23 of the guide plate 24 in a side view. The forward overhang length of the lower overhang plate 26 is longer than the forward overhang length of the upper overhang plate 25, and the tip position 26a of the lower overhang plate 26 is the tip position 25a of the upper overhang plate 25. It is located in front of the position on the same vertical plane as.

Next, the operation of the combustion device 1 of this one embodiment will be described.
When the operation of the combustion device 1 is instructed by the remote control (shown), the combustion of the burner 7 is started by receiving the supply of combustion air from the blower fan 6, and the combustion gas generated by the combustion of the burner 7 is heat. After passing through the exchanger 9, it flows into the exhaust collecting chamber 10, flows through the exhaust collecting chamber 10, and is discharged from the exhaust collecting chamber 10 to the outside of the combustion device 1 through the exhaust port 5 of the exhaust unit 11. .. Further, the fluid to be heated supplied to the heat radiating terminal 12 flows through the heat receiving tube 8 by driving the circulation pump 15, is heated by heat exchange with the combustion gas in the heat exchanger 9, and goes out from the heat receiving tube 8. It is guided to the tube 14 and supplied to the heat dissipation terminal 12.

Here, with reference to FIGS. 6 and 7, the main part of the rectifying tool 21 and the windbreaker 17 in a state of being attached to the front surface of the exhaust port 5 will be described, and the rectifying tool 21 and the windbreaker 17 will be discharged from the exhaust port 5 to the outside of the combustion device 1. The flow of combustion gas will be described.

First, by providing the windbreaker 17 on the front side of the exhaust port 5, even if the wind blows from the front side (front side) of the exhaust port 5 toward the exhaust port 5 during combustion, even if the wind blows toward the exhaust port 5. By preventing the wind, the wind pressure applied to the exhaust port 5 is reduced, the combustion gas is smoothly discharged from the exhaust port 5, combustion and ignition are stable, and incomplete combustion, misfire, inability to reignite, etc. are prevented. It is something that can be done.

Further, the rectifying tool 21 is provided with a windbreaker 17 so that a doglegged (inverted in FIG. 6) guide plate 24 is located substantially in the center of the exhaust port 5 in the height direction (vertical direction). It is arranged to face the front surface of the exhaust port 5, which is located closer to the exhaust port 5 than the front wall 20 of the above. Then, the combustion gas discharged from the exhaust port 5 during combustion generates a flow that goes diagonally forward and upward along the upper inclined plate 22 and a flow that goes diagonally forward and downward along the lower inclined plate 23. The combustion gas discharged from the exhaust port 5 is guided to the outside by the guide plate 24 so as to be substantially divided into upper and lower parts.

At this time, the dogleg-shaped guide plate 24 is a virtual extension line extending diagonally forward from the tips 22a and 23a of the upper inclined plate 22 and the lower inclined plate 23, which are plate portions forming the dogleg. To prevent L1 (see the broken line in FIG. 6) from overlapping the front wall 20 of the windbreaker 17 (in other words, the upper inclined plate 22 and the lower inclined plate 23, which are plate portions forming a dogleg shape, respectively. (So that the front wall 20 of the windbreaker 17 does not exist on the virtual extension line L1 extending diagonally forward from the tip), the shape is such that the inclination angle of the dogleg is set. By forming the shape with an angle, the front wall of the windbreaker 17 is prevented from flowing toward the front wall 20 (the back surface of the front wall 20) of the windbreaker 17 by the flow of the combustion gas discharged from the exhaust port 5. Since the guide plate 24 can be directed diagonally forward and upward and diagonally forward and downward so as to avoid 20 (the back surface of the front wall 20), the combustion gas discharged from the exhaust port 5 is the front wall 20 of the windbreaker 17. It bounces off (the back surface of the front wall 20), flows toward the front plate 2a side of the housing 2 of the combustion device 1, hits the surface of the front plate 2a, and the surfaces of the front plate 2a located above and below the exhaust port 5 enter the combustion gas. It is possible to prevent problems such as stains due to the contained soot or discoloration due to the heat of the combustion gas, and the appearance is not spoiled.

Further, the rectifying tool 21 is substantially above the exhaust port 5 and the guide plate 24 in the vertical direction from the same vertical surface as the opening surface of the exhaust port 5 toward the front (front wall 20 side of the windbreaker 17). A horizontally overhanging plate 25 is provided, and a windbreaker 17 is provided on the front surface of the exhaust port 5 to block a part of the upper surface opening above the exhaust port 5 near the exhaust port 5. Therefore, it is possible to prevent the flow of the combustion gas that comes out of the exhaust port 5 and tries to flow directly upward, so that there is no flow of the combustion gas that comes out of the exhaust port 5 and rises along the surface of the front plate 2a. It is possible to prevent problems such as the surface of the front plate 2a located above the exhaust port 5 becoming dirty due to soot contained in the exhaust gas or discoloration due to the heat of the exhaust gas, and the appearance is not spoiled. Further, it is also possible to prevent rainwater or the like falling from above the combustion device 1 from entering the exhaust port 5.

Further, the position of the tip 25a of the overhanging plate 25 is a position in front of the position on the same vertical plane as the tip 22a of the upper inclined plate 22, and the overhanging plate 25 is the position of the upper inclined plate 22. It is set at a position so that it does not overlap with the extension line L1, and more specifically, a virtual angle formed by the upper inclined plate 22 with respect to the same vertical plane as the opening surface of the exhaust port 5 is substantially the same. When the first diagonal line L2 (see the alternate long and short dash line in FIG. 6) is extended from the upper end of the exhaust port 5 (the upper end on the opening surface of the exhaust port 5) to the front (front wall 20 of the windbreaker 17). It should be on the first diagonal line L2 (the position where the first diagonal line L2 and the tip 25a of the overhanging plate 25 intersect) and should be in front of the position on the same vertical plane as the tip 22a of the upper inclined plate 22. I have to. By doing so, the overhanging plate 25 prevents rainwater or the like falling from above the combustion device 1 from dripping on the upper inclined plate 22 of the guide plate 24, and the rainwater or the like enters the exhaust port 5. Without forming an exhaust resistance that obstructs the flow of combustion gas diagonally forward and upward, and without forming a strong flow of combustion gas toward the front wall 20 side of the windbreaker 17, to the outside. It is possible to smoothly discharge the combustion gas.

Further, the position of the tip 25a of the overhanging plate 25 may be the position on the same vertical plane as the tip 22a of the upper inclined plate 22, and in this case as well, the overhanging plate 25 is the combustion device 1 Prevents rainwater and the like falling from above the guide plate 24 from dripping on the upper inclined plate 22 of the guide plate 24, and reliably suppresses the intrusion of rainwater and the like into the exhaust port 5 while allowing the flow of combustion gas diagonally forward and upward. It exerts the effect that the combustion gas can be smoothly discharged to the outside without forming a strong flow of the combustion gas toward the front wall 20 side of the windbreaker 17 without becoming an obstructive exhaust resistance. It is a thing.

The angle formed by the first diagonal line L2 is substantially the same as the angle formed by the upper inclined plate 22 with respect to the same vertical surface as the opening surface of the exhaust port 5, but the substantially same angle referred to here is an upward inclination. The angle formed by the plate 22 with respect to the same vertical plane as the opening surface of the exhaust port 5 is set as a reference angle, and the angle is within a range of ± 5 ° from the reference angle.

Further, the rectifying tool 21 is substantially below the exhaust port 5 and the guide plate 24 in the vertical direction from the same vertical surface as the opening surface of the exhaust port 5 toward the front (front wall 20 side of the windbreaker 17). The exhaust port 5 is provided with a horizontally overhanging plate 26 and a windbreaker 17 is provided on the front surface of the exhaust port 5 to block a part of the lower surface opening below the exhaust port 5. Since it is possible to prevent the flow of the combustion gas that comes out of the exhaust port and tries to flow directly below, there is no flow of the combustion gas that comes out of the exhaust port 5 and descends along the surface of the front plate 2a, and is below the exhaust port 5. It is possible to prevent problems such as the surface of the front surface plate 2a located being soiled by soot contained in the exhaust gas or discoloration due to the heat of the exhaust gas, and the appearance is not spoiled.

Further, the lower overhang plate 26 has a longer overhang length than the upper overhang plate 25, and the position of the tip 26a of the lower overhang plate 26 is the same as the tip position 25a of the upper overhang plate 25. The position is set in front of the position on the surface so that the underhanging plate 26 does not overlap the extension line L1 of the lower inclined plate 23, and more specifically, the underhanging plate 26 is set. The position of the tip 26a of the plate 26 is a virtual second diagonal line L3 (see the two-dot chain line in FIG. 6) having substantially the same angle as the angle formed by the lower inclined plate 23 with respect to the same vertical plane as the opening surface of the exhaust port 5. When the lower end of the exhaust port 5 (the lower end on the opening surface of the exhaust port 5) is extended to the front (front wall 20 of the windbreaker 17), the second diagonal line L3 and the underhanging plate 26 intersect. In front of the position, the lower overhang plate 26 does not overlap the extension line L1 of the lower inclined plate 23, and is located in front of the position on the same vertical plane as the tip position 25a of the upper overhang plate 25. It is set. From a test conducted in advance (a test for examining the flow of combustion gas, noise level, etc.), the position of the tip 26a of the underhanging plate 26 is determined by the underhanging plate 26 as shown in FIG. It is more preferable to set the position so as to close substantially half of the lower surface opening below the exhaust port 5 formed by providing the windbreaker 17 on the front surface of the exhaust port 5.

The angle formed by the second diagonal line L3 is substantially the same as the angle formed by the lower inclined plate 23 with respect to the same vertical plane as the opening surface of the exhaust port 5, but the substantially same angle referred to here is downwardly inclined. The angle formed by the plate 23 with respect to the same vertical plane as the opening surface of the exhaust port 5 is set as a reference angle, and the angle is within a range of ± 5 ° from the reference angle.

By setting the position of the tip 25a of the upper overhang plate 25 and the position of the tip 25a of the lower overhang plate 26 to the positions as described above, the windbreaker 17 is provided on the front surface of the exhaust port 5. Approximately one-third of the formed upper surface opening above the exhaust port 5 is closed by the upper overhang plate 25, and approximately half of the lower surface opening below the exhaust port 5 is closed by the lower overhang plate 26 (FIG. 6). , 7), the opening area of the upper surface opening is larger than the opening area of the lower surface opening. Then, since the exhaust resistance of the upper surface opening side is smaller than that of the lower surface opening side, the amount of combustion gas discharged from the exhaust port 5 and going upward along the upper inclined plate 22 is burned downward along the lower inclined plate 23. It will be more than the amount of gas.

Here, the position of the tip 25a of the overhanging plate 25 is a position in front of the position on the same vertical plane as the tip 22a of the upper inclined plate 22, and the overhanging plate 25 is an extension of the upper inclined plate 22. A first diagonal line L2 (FIG. 6) at a position that does not overlap the line L1, more specifically, at an angle substantially the same as the angle formed by the upper inclined plate 22 with respect to the same vertical plane as the opening surface of the exhaust port 5 (FIG. 6). When the one-dot chain line inside is extended from the upper end of the exhaust port 5 (the upper end on the opening surface of the exhaust port 5) to the front (front wall 20 of the windbreaker 17), it is on the first diagonal line L2. Since the position is in front of the position on the same vertical plane as the tip 22a of the upper inclined plate 22, as shown by the arrow Hu in FIG. 7, the amount of combustion gas discharged from the upper surface opening side is large, but the upper part. The combustion gas that goes upward along the inclined plate 22 does not form a flow of the combustion gas toward the front wall 20 side of the windbreaker 17, and is hardly disturbed by the overhanging plate 25. It is smoothly exhausted to the outside at substantially the same inclination angle as 22.

On the other hand, the position of the tip 26a of the lower overhang plate 26 is a position in front of the position on the same vertical plane as the tip position 25a of the upper overhang plate 25, and the lower overhang plate 26 is the lower inclined plate 23. A position that does not overlap the extension line L1, more specifically, a second diagonal line L3 that forms substantially the same angle as the angle formed by the lower inclined plate 23 with respect to the same vertical plane as the opening surface of the exhaust port 5 (FIG. When the two-dot chain line in 6 is extended from the lower end of the exhaust port 5 (the lower end on the opening surface of the exhaust port 5) to the front (front wall 20 of the windbreaker 17), the second diagonal line L3 and the bottom In front of the position where the overhanging plates 26 intersect, the lower overhanging plate 26 does not overlap the extension line L1 of the lower inclined plate 23, and is on the same vertical plane as the tip position 25a of the upper overhanging plate 25. Since the position is in front of the position, the flow of the combustion gas toward the lower surface opening includes a flow along the lower inclined plate 23 at an inclination angle substantially the same as that of the lower inclined plate 23 and an underhanging plate 26. There are two flows, one along the top (see the two arrows shown between the lower tilt plate 23 and the lower overhang plate 26 in FIG. 7). Therefore, the flow direction of the combustion gas discharged from the lower surface opening side is the combined direction of the above two flow directions, and is closer to the horizontal than the inclination angle of the lower inclined plate 23 as shown by the arrow Hd in FIG. The tilt angle (tilt angle in the direction away from the front plate 2a).

Further, the overhang length of the lower overhang plate 26 is made longer than the overhang length of the upper overhang plate 25, and the opening area of the lower surface opening is made smaller than the opening area of the upper surface opening, so that the gas is discharged from the upper surface opening. The amount of combustion gas discharged from the lower surface opening is smaller than the amount of combustion gas discharged from the lower surface opening, and the outlet position of the combustion gas discharged from the lower surface opening is earlier than the outlet position of the combustion gas discharged from the upper surface opening. Since the position is far from the face plate 2a, even if the area of the front plate 2a located below the exhaust port 5 is larger than that above the exhaust port 5, it is difficult for the combustion gas to hit and the front plate is located below the exhaust port 5. It is possible to prevent problems such as the surface of 2a being soiled by soot contained in the combustion gas or discoloration due to the heat of the combustion gas, and the appearance is not spoiled.

Further, since the lower surface opening is narrower than the upper surface opening, the flow velocity of the combustion gas when passing through the opening portion of the lower surface opening (the portion not blocked by the lower overhang plate 26) is the opening portion of the upper surface opening (upper). Since the flow velocity of the combustion gas when passing through the overhanging plate 25 (the portion not blocked by the overhanging plate 25) is faster than the flow velocity of the combustion gas, the combustion gas from the lower surface opening has a horizontal inclination angle as shown by the arrow Hd in FIG. It is vigorously discharged in the direction away from the front plate 2a. As a result, even if the exhaust port 5 is located above the front plate 2a and the area of the front plate 2a located below the exhaust port 5 is large, the combustion gas does not hit that portion and the exhaust port 5 is located above the exhaust port 5. It is possible to prevent problems such as the surface of the front plate 2a located below being soiled by soot contained in the exhaust gas or discoloration due to the heat of the exhaust gas, and the appearance is not spoiled.

The present invention is not limited to the one embodiment described above. In the present embodiment, the windbreaker 17 and the rectifier 21 are independent members. For example, the windbreaker 17 is used for rectification. The structure of the tool 21 (guide plate 24, upper overhang plate 25, lower overhang plate 26) may be combined as one member, and various changes can be made without changing the gist of the invention. is there.

Further, in the present embodiment, the combustion device 1 is used as a boiler for hot water heating that heats the fluid to be heated circulated in the heat radiation terminal 12, but the water supply pipe is replaced with the water supply pipe 13 instead of the return pipe 13 on the water inlet side of the heat receiving pipe 8. A hot water pipe may be connected to the water outlet side of the heat receiving pipe 8 instead of the outgoing pipe 14, and the combustion device 1 may be used as a water heater to supply hot water to a hot water tap provided at a predetermined position. is there.

Further, in the present embodiment, the combustion device 1 is a sensible heat recovery type, but the combustion device 1 is provided with a latent heat exchanger, a neutralizer, etc., and is a latent heat recovery type that recovers not only sensible heat but also latent heat. Is also good.

1 Combustor 2 Housing 3 Combustor 5 Exhaust port 17 Windbreaker 20 Front wall 21 Rectifier 22 Upper tilt plate 23 Lower tilt plate 24 Guide plate 25 Overhang plate 26 Under overhang plate L1 Extension line L2 First diagonal line L3 2nd diagonal line

Claims (3)

A combustor housed in the housing to heat the fluid to be heated, an exhaust port located in the upper part of the housing and exhausting the combustion gas generated by the combustor to the outside, and an exhaust port in front of the exhaust port and in front of the exhaust port. In a combustion device having a front wall covering the above and having a windbreak means having an open upper and lower surfaces, a flow direction of combustion gas discharged from the exhaust port is defined between the exhaust port and the windbreak means. The rectifying means is provided with a dogleg-shaped guide plate that guides the combustion gas discharged from the exhaust port diagonally forward and upward and diagonally forward and downward, and the dogleg of the guide plate is formed. The extension line of the plate portion to be formed has a shape that does not overlap the front wall of the windbreak means, and the rectifying means has an overhanging plate that projects forward from the exhaust port and the guide plate. At the same time, the exhaust port and the guide plate are provided with a lower overhang plate that projects forward, and the length of the lower overhang plate is made longer than the length of the upper overhang plate. Combustion device. The guide plate has an upwardly inclined plate extending diagonally forward and upward and a downwardly inclined plate extending diagonally forward and downward as the plate portion forming the dogleg shape, and the tip position of the overhanging plate. The position on the same vertical plane as the tip of the upper inclined plate, or the position on the same vertical plane as the tip of the upper inclined plate without the overhanging plate overlapping the extension line of the upper inclined plate. The position is set in front of the above, and the tip position of the lower overhang plate is on the same vertical plane as the tip position of the upper overhang plate so that the lower overhang plate does not overlap the extension line of the lower inclined plate. The combustion apparatus according to claim 1, wherein the position is set in front of the position of. The tip position of the overhanging plate is positioned on the same vertical plane as the tip of the upper inclined plate, or the overhanging plate does not overlap the extension line of the upper inclined plate, and the upper inclined plate is formed. When the first diagonal line forming an angle substantially the same as the angle formed with respect to the same vertical plane as the opening surface of the exhaust port is extended forward from the upper end of the exhaust port, the upper inclined plate is on the first diagonal line. The position of the tip of the underhanging plate is substantially the same as the angle formed by the downward inclined plate with respect to the same vertical plane as the opening surface of the exhaust port. When the second diagonal line forming the above is extended forward from the lower end of the exhaust port, the lower overhang plate is an extension of the lower inclined plate in front of the position where the second diagonal line and the lower overhang plate intersect. The combustion apparatus according to claim 2, wherein the combustion apparatus does not overlap the lines and is located in front of the position on the same vertical plane as the tip position of the overhanging plate.

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