JP7222864B2 - Combustion device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combustion apparatus having a wind protector attached to the front surface of an exhaust port.

Conventionally, this type of device has a combustor that is housed in a housing and heats the fluid to be heated, an exhaust port that is located in the upper part of the front plate that constitutes the housing and discharges the combustion gas generated by the combustor to the outside, and an exhaust port. In a combustion device in which the exhaust port faces a hole formed in the upper part of the front plate constituting the housing and exhausts the combustion exhaust to the outside from the exhaust port, the exhaust port is the upper part of the front plate constituting the housing. In a combustion device for discharging combustion exhaust to the outside from the exhaust port by facing the hole formed in the above, a wind guard is provided on the front side of the exhaust port, and during combustion, from the front side of the exhaust port toward the exhaust port There has been a combustion device that blocks the wind even when the wind blows, prevents the wind pressure applied to the exhaust port from increasing, and prevents problems such as incomplete combustion and misfiring from occurring. (For example, see Patent Document 1.)

JP 2016-133246 A

By the way, in this conventional system, the combustion gas discharged from the exhaust port during combustion bounces off the wind guard, flows to the housing side of the combustion device, hits the housing surface, and is damaged by the combustion device located above and below the exhaust port. The surface of the housing may become dirty with the 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 area of the front plate located below the exhaust port is larger than the area above the exhaust port where the combustion gas bounced off the windshield hits, and the above-mentioned dirt and discoloration at that part are regarded as problems. .

In order to solve the above problems, in claim 1, a combustor that is housed in a housing and heats a fluid to be heated, and a combustor that is located in the upper part of the housing and discharges combustion gas generated by the combustor to the outside. and a windbreak means having upper and lower surfaces open and having a front wall covering the front of the exhaust port in front of the exhaust port, wherein the exhaust port and the windbreak means is provided with rectifying means for regulating the flow direction of the combustion gas discharged from the exhaust port, the rectifying means having a dogleg shape that guides the combustion gas discharged from the exhaust port obliquely forwardly upward and obliquely forwardly downward. and the extension line of the plate portion forming the doglegged shape of the guide plate has a shape that does not overlap the front wall of the windbreak means, and the straightening means includes the exhaust port and the guide plate It has an upper overhanging plate that overhangs forward and upward, and has a lower overhanging plate that overhangs forward below the exhaust port and the guide plate, and the length of the lower overhanging plate is length of the upper overhang plate.

In a second aspect of the present invention, the guide plate has an upper inclined plate extending diagonally forward and upward and a lower inclined plate extending diagonally forward and downward as the plate portion forming the dogleg shape. The tip position of the upper projecting plate is positioned on the same vertical plane as the tip of the upper tilting plate, or the tip of the upper tilting plate is positioned so that the upper projecting plate does not overlap the extension line of the upper tilting plate. and the tip position of the lower overhanging plate is positioned forward of the position on the same vertical plane as that of the upper overhanging plate so that the lower overhanging plate does not overlap the extension line of the lower inclined plate. It was assumed to be a position forward of the position on the same vertical plane as the tip position.

Further, in claim 3, the tip position of the upper projecting plate may be positioned on the same vertical plane as the tip of the upper tilting plate, or the upper projecting plate may overlap the extension line of the upper tilting plate. However, when a first oblique line forming an angle substantially the same as the angle the upper inclined plate makes 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 oblique line and positioned forward of a position on the same vertical plane as the tip of the upper inclined plate, and the tip position of the lower projecting plate is positioned so that the lower inclined plate is positioned on the same vertical plane as the opening surface of the exhaust port. When extending forward from the lower end of the exhaust port, a second oblique line forming substantially the same angle as that of the lower overhanging plate extends forward from a position where the second oblique line intersects with the lower overhanging plate. does not overlap the extended line of the lower inclined plate, and is positioned forward of a position on the same vertical plane as the tip position of the upper projecting plate.

According to claim 1 of the present invention, the rectifying means has a dogleg-shaped guide plate for guiding the combustion gas discharged from the exhaust port obliquely forwardly upward and obliquely forwardly downward, and the dogleg of the guide plate is The extension line of the formed plate portion has a shape that does not overlap the front wall of the windbreak means, so that the flow of the combustion gas discharged from the exhaust port does not go toward the front wall of the windbreak means. Since it can be oriented forwardly upward and obliquely forwardly downward, the combustion gas discharged from the exhaust port bounces off the front wall of the windbreak means, flows toward the housing side of the combustion apparatus, and is located above and below the exhaust port. It is possible to prevent problems such as contamination of the body surface with soot contained in the combustion gas, or discoloration due to the heat of the combustion gas, without impairing the appearance.

Further, the rectifying means has an upper projecting plate projecting forward above the exhaust port and the guide plate, and a lower projecting plate projecting forward below the exhaust port and the guide plate. By doing so, it is possible to prevent the flow of combustion gas that tries to flow directly upward from the exhaust port, or the flow of combustion gas that tries to flow directly downward from the exhaust port. There is no flow of combustion gas that exits and rises along the surface of the housing, or a flow of combustion gas that exits from the exhaust port and descends along the surface of the housing. It is possible to prevent problems such as contamination by soot contained in the combustion gas and discoloration caused by the heat of the combustion gas, and the appearance is not spoiled.

In addition, since the length of the lower projecting plate is longer than the length of the upper projecting plate, the opening area of the lower opening formed between the exhaust port and the windbreak means is larger than the opening area of the upper opening. The amount of combustion gas discharged from the lower opening becomes smaller than the amount of combustion gas discharged from the upper opening, and the combustion gas discharged from the upper opening is discharged from the lower opening rather than the exit position. Since the exit 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 more difficult than the exhaust port. It is possible to prevent the surface of the housing positioned below from being stained with soot contained in the combustion gas, or from being discolored due to the heat of the combustion gas, so that the aesthetic appearance is not spoiled.

According to claim 2, the guide plate has an upper inclined plate extending obliquely forward and upward and a lower inclined plate extending obliquely forward and downward as the plate portion forming the dogleg shape. By setting the tip position of the projecting plate to the position on the same vertical plane as the tip of the upper inclined plate, or to the position in front of the position on the same vertical plane as the tip of the upper inclined plate, the upper projecting plate will not burn. Prevents rainwater, etc. falling from above the device from dripping on the upper inclined plate of the guide plate, reliably suppresses rainwater, etc. from entering the exhaust port, and directs 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 lower projecting plate does not overlap with the extension line of the lower inclined plate, In addition, by positioning the lower projecting plate at a position forward of the position on the same vertical plane as the tip position of the upper projecting plate, the lower projecting plate strengthens the flow of the 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.

Further, according to claim 3, the tip position of the upper projecting plate is positioned on the same vertical plane as the tip of the upper inclined plate, or the upper projecting plate does not overlap the extension line of the upper inclined plate. When extending forward from the upper end of the exhaust port, a first oblique line that forms an angle substantially equal to the angle that the inclined plate makes 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. By locating the upper overhanging plate at a position forward of the position on the same vertical plane as the tip, there is almost no exhaust resistance that hinders the flow of combustion gas obliquely 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 the above-mentioned claim 3, further, the tip position of the lower overhanging plate is positioned forward from the lower end of the exhaust port so as to form a second slanted line that forms substantially the same angle as the angle that the lower inclined plate makes with respect to the same vertical plane as the opening surface of the exhaust port. When extended to the side, the lower overhanging plate does not overlap the extension line of the lower inclined plate forward of the position where the second oblique line and the lower overhanging plate intersect, and the tip position of the upper overhanging plate It is positioned forward 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: a flow downward along the lower inclined plate at substantially the same inclination angle as the lower inclined plate, and a flow along the lower overhanging plate. do. Therefore, the direction of flow of the combustion gas discharged from the opening of the lower surface is a direction obtained by combining the above two flow directions, and the inclination angle is closer to the 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. Combustion gas from the bottom opening is vigorously discharged in a direction away from the housing at an inclination angle close to the horizontal. As a result, even if the exhaust port is located in 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 that part, and the housing located below the exhaust port does not. It is possible to prevent the surface from becoming dirty with soot contained in the combustion gas, or discoloring due to the heat of the combustion gas, and does not impair the appearance.

BRIEF DESCRIPTION OF THE DRAWINGS The perspective view which shows the combustion apparatus of one Embodiment of this invention. FIG. 2 is an exploded perspective view of the essential parts of the combustion apparatus of the same embodiment; 1 is a schematic configuration diagram showing a hot water heating system using the combustion device of the same embodiment; FIG. The perspective view which shows a wind guard. (a) The perspective view which shows a rectifier. (b) Vertical cross-sectional view of a rectifier. FIG. 2 is an enlarged cross-sectional view of a main part of the combustion apparatus of the same embodiment; FIG. 4 is a diagram for explaining the flow of combustion gas discharged to the outside from the essential parts of the combustion apparatus of the same embodiment;

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

Reference numeral 1 denotes an outdoor installation type combustion apparatus of this embodiment, 2 a housing of the combustion apparatus 1, and 3 a combustor which is housed in the housing 2 and heats a 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. 5 faces the hole 4, and the combustion gas generated in the combustor 3 is discharged to the outside through the exhaust port 5. An air supply port (not shown) for introducing air into the combustion device 1 is provided at an appropriate location on the housing 2, for example, the side plate 2c.

The combustor 3 includes a burner 7 that receives combustion air supplied from a blower fan 6 to burn fuel, and water that collects sensible heat from the combustion gas generated by the combustion of the burner 7 and flows through a heat receiving tube 8. A fin-tube heat exchanger 9 for heating a liquid to be heated such as antifreeze, an exhaust collecting chamber 10 in which combustion gas after passing through the heat exchanger 9 flows, and a combustion gas passing through the exhaust collecting chamber 10. and an exhaust port 11 having an exhaust port 5 for discharging to the outside, and the exhaust port 5 as an opening formed most downstream in the combustion gas flow direction of the exhaust portion 11 5.

12 is a heat radiating terminal such as a floor heating panel or panel convector that heats the space to be air-conditioned; A return pipe leading to the heat pipe 8, a forward pipe 14 connecting the heat radiating terminal 12 and the water outlet side of the heat receiving pipe 8 and guiding the heated fluid heated by the heat exchanger 9 to the heat radiating terminal 12, and a forward pipe 15 A circulating pump provided to circulate the heated fluid heated by the heat exchanger 9 to the heat radiation terminal 12, and a steam separator 16 provided in the feed pipe 14 to separate air and liquid in the heated fluid.

Reference numeral 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, and prevents 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 includes a left side wall 18 that covers the left side of the exhaust port 5 in the horizontal width direction and has a mounting surface to the exhaust part 11, It has a right side wall 19 covering the right side of the exhaust port 5 in the horizontal width direction and having a mounting surface to the exhaust part 11, and a front wall 20 covering 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 connected through a curved corner part, and the left side wall 18, the right side wall 19, and the front wall 20 are integrally molded, and the upper and lower surfaces are opened. It has a substantially U-shape, and when the windshield 17 is attached to the exhaust part 11, the front wall 20 of the windshield 17 is positioned so as to face the exhaust port 5 with a predetermined gap. A space is formed between the exhaust port 5 and the front wall 20 of the windshield 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 air outlet 5 (the length from the lower end to the upper end of the air outlet 5). When the windshield 17 is attached to the front surface of the exhaust port 5, the lower end of the windshield 17 is located below the lower end of the exhaust port 5, and the upper end of the windshield 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 wind guard 17 in the discharge 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 straightener as straightening means for regulating the flow direction of the combustion gas discharged from the exhaust port 5 to the outside. As shown in FIG. Extending diagonally forward and upward toward the front wall 20 side of the upper inclined plate 22 and the windbreaker 17 for guiding the combustion gas from the exhaust port 5 diagonally forward and upward, and extending diagonally forward and downward from the exhaust port 5 and a lower inclined plate 23 that guides the combustion gas obliquely forward and downward. ) is provided.

Furthermore, in the rectifier 21, a wind guard is provided above the exhaust port 5 and the guide plate 24, from the exhaust part 11 on the surface where the exhaust port 5 is formed, toward the front wall 20 of the wind guard 17. 17, and below the exhaust port 5 and the guide plate 24, the air exhaust portion 11 on the surface where the exhaust port 5 is formed. A lower projecting plate 26 extending substantially horizontally along the substantially lower end of the windbreaker 17 is provided toward the front wall 20 of the tool 17 . The air baffle 17 and straightener 21 may be fixed to the exhaust section 11 by screwing, for example, or may be fixed by other methods such as welding.

The upper protruding plate 25 protrudes so that its tip 25a is positioned forward of the tip 22a of the upper inclined plate 22 of the guide plate 24 in a side view. The lower protruding plate 26 protrudes so that its tip 26a is positioned forward 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 overhanging plate 26 is longer than the forward overhanging length of the upper overhanging plate 25, and the tip position 26a of the lower overhanging plate 26 coincides with the tip position 25a of the upper overhanging plate 25. It is positioned in front of the position on the same vertical plane as .

Next, the operation of the combustion device 1 of this embodiment will be described.
When a command to start the operation of the combustion device 1 is given by a remote controller (shown in the figure), combustion air is supplied from the blower fan 6 to start the combustion of the burner 7, and the combustion gas generated by the combustion of the burner 7 is heated. After passing through the exchanger 9, it flows into the exhaust collecting chamber 10, flows through the exhaust collecting chamber 10, and is discharged out of the combustion apparatus 1 from the exhaust collecting chamber 10 through the exhaust port 5 of the exhaust section 11. . The heated fluid supplied to the heat radiating terminal 12 is driven by the circulation pump 15 to flow through the heat receiving pipe 8, is heated by heat exchange with the combustion gas in the heat exchanger 9, and flows out from the heat receiving pipe 8. It is led to the tube 14 and supplied to the heat radiating terminal 12 .

Here, with reference to FIGS. 6 and 7, the main parts of the straightener 21 and the wind protector 17 attached to the front surface of the exhaust port 5 will be described, and the air discharged from the exhaust port 5 to the outside of the combustion apparatus 1 will be described. The flow of combustion gas will be explained.

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, The wind is blocked to reduce the wind pressure applied to the exhaust port 5, the combustion gas is smoothly discharged from the exhaust port 5, the combustion and ignition are stabilized, and the incomplete combustion, misfire, reignition failure, etc. are prevented. It is possible.

Further, the rectifier 21 is arranged so that the guide plate 24 in the shape of a letter "V" (in FIG. It is arranged to face the front surface of the exhaust port 5 which is closer to the exhaust port 5 than the front wall 20 of the. Then, in the combustion gas discharged from the exhaust port 5 during combustion, a flow obliquely forward and upward along the upper inclined plate 22 and a flow obliquely forward and downward along the lower inclined plate 23 are generated. The combustion gas discharged from the exhaust port 5 is guided to the outside by the guide plate 24 so as to be vertically divided into two parts.

At this time, the V-shaped guide plate 24 is an imaginary extension line extending obliquely 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 V shape. L1 (see the dashed line in FIG. 6) does not overlap the front wall 20 of the windbreaker 17 (in other words, each of the upper inclined plate 22 and the lower inclined plate 23, which are plate portions forming a dogleg, The front wall 20 of the windbreaker 17 does not exist on the virtual extension line L1 extending obliquely forward from the tip, and the angle of inclination is set in a dogleg shape. The front wall of the windshield 17 is shaped so that the combustion gas discharged from the exhaust port 5 does not flow toward the front wall 20 (back surface of the front wall 20) of the windshield 17. 20 (the back surface of the front wall 20) can be directed obliquely forwardly upward and obliquely forwardly downward by the guide plate 24, so that the combustion gas discharged from the exhaust port 5 is directed toward the front wall 20 of the windshield 17. (Back surface of the front wall 20), flows to the front plate 2a side of the housing 2 of the combustion device 1, hits the surface of the front plate 2a, and the surface of the front plate 2a located above and below the exhaust port 5 is in the combustion gas. It is possible to prevent troubles such as contamination by contained soot and the occurrence of discoloration due to heat of combustion gas, and the aesthetic appearance is not spoiled.

In the vertical direction, the rectifier 21 is provided above the exhaust port 5 and the guide plate 24 and approximately forward from the same vertical plane as the opening surface of the exhaust port 5 (toward the front wall 20 of the windshield 17). A horizontally projecting upper projecting plate 25 is provided to block a part of the upper surface opening above the exhaust port 5 formed by providing a windbreaker 17 on the front surface of the exhaust port 5 near the exhaust port 5. - 特許庁Therefore, the flow of the combustion gas coming out of the exhaust port 5 and trying to flow directly upward can be prevented. It is possible to prevent the surface of the front plate 2a located above the exhaust port 5 from being stained with soot contained in the combustion gas, or from being discolored due to the heat of the combustion gas. Furthermore, 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 upper protruding plate 25 has a tip 25a located in front of a position on the same vertical plane as the tip 22a of the upper inclined plate 22, and the upper protruding plate 25 is located above the upper inclined plate 22. It is set at a position that does not overlap with the extension line L1. When the first oblique line L2 (see one-dot chain 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 windshield 17) side, It should be located on the first oblique line L2 (the position where the first oblique line L2 and the tip 25a of the upper projecting plate 25 intersect) and 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 upper protruding plate 25 prevents rainwater, etc. falling from above the combustion device 1 from dripping onto the upper inclined plate 22 of the guide plate 24, and rainwater, etc., enters the exhaust port 5. While reliably suppressing the flow of combustion gas toward the front wall 20 side of the windbreaker 17 without becoming an exhaust resistance that disturbs the flow of the combustion gas obliquely upward and forward, without strongly forming the flow of the combustion gas toward the front wall 20 side of the windbreaker 17, It is possible to smoothly discharge the combustion gas.

The tip 25a of the upper projecting plate 25 may be positioned on the same vertical plane as the tip 22a of the upper inclined plate 22. While preventing rainwater, etc. falling from above from dripping on the upper inclined plate 22 of the guide plate 24, reliably suppressing rainwater, etc., from entering the exhaust port 5, the flow of combustion gas obliquely forward and upward is prevented. The combustion gas can be discharged smoothly to the outside without creating a strong flow of the combustion gas toward the front wall 20 side of the wind guard 17 without causing obstructive exhaust resistance. It is.

The angle formed by the first oblique line L2 is substantially the same angle 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. The angle formed by the plate 22 with respect to the same vertical plane as the opening surface of the exhaust port 5 is defined as a reference angle, and the angle is set within a range of ±5° from the reference angle.

In addition, in the straightener 21, there is provided a vertical direction below the exhaust port 5 and the guide plate 24, and approximately forward from the same vertical plane as the opening surface of the exhaust port 5 (toward the front wall 20 of the windbreaker 17). A horizontally projecting lower projecting plate 26 is provided to block a part of the lower surface opening below the exhaust port 5 formed by providing the windbreaker 17 in front of the exhaust port 5. Since it is possible to prevent the flow of combustion gas coming out of the exhaust port 5 and trying to flow directly below, there is no flow of combustion gas coming out of the exhaust port 5 and descending along the surface of the front plate 2a. It is possible to prevent the surface of the front plate 2a located on the front plate 2a from being stained with soot contained in the combustion gas, or from being discolored by the heat of the combustion gas.

Furthermore, the lower projecting plate 26 has a projecting length longer than that of the upper projecting plate 25, and the position of the tip 26a of the lower projecting plate 26 is aligned with the tip position 25a of the upper projecting plate 25. It is set at a position forward of the position on the surface and at a position such that the lower overhanging plate 26 does not overlap the extension line L1 of the lower inclined plate 23. More specifically, the lower overhanging plate 26 The position of the tip 26a of the plate 26 is defined by an imaginary second oblique line L3 (see the two-dot chain line in FIG. ) extends forward (front wall 20 of windbreaker 17) from the lower end of exhaust port 5 (the lower end on the opening surface of exhaust port 5), second oblique line L3 and lower projecting plate 26 intersect. position, the lower overhanging plate 26 does not overlap the extension line L1 of the lower inclined plate 23, and the position is in front of the position on the same vertical plane as the tip position 25a of the upper overhanging plate 25. is set. It should be noted that the position of the tip 26a of the lower projecting plate 26 was determined from a test conducted in advance (a test to examine the flow of combustion gas, noise level, etc.) as shown in FIG. It is more preferable to set the position so as to block substantially half of the lower surface opening below the exhaust port 5 formed by providing the wind guard 17 in front of the exhaust port 5 .

The angle formed by the second oblique line L3 is 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. The angle formed by the plate 23 with respect to the same vertical plane as the opening surface of the exhaust port 5 is defined as a reference angle, and the angle is set within a range of ±5° from the reference angle.

By setting the tip 25a of the upper overhanging plate 25 and the tip 25a of the lower overhanging plate 26 at the positions described above, the windbreaker 17 is provided in front of the exhaust port 5. Approximately one-third of the upper surface opening above the exhaust port 5 is blocked by the upper projecting plate 25, and approximately half of the lower surface opening below the exhaust port 5 is blocked by the lower projecting plate 26 (FIG. 6). , 7.), the opening area of the top opening is larger than the opening area of the bottom opening. Then, since the exhaust resistance on the upper surface opening side is smaller than that on the lower surface opening side, the amount of combustion gas discharged from the exhaust port 5 and directed upward along the upper inclined plate 22 is the combustion directed downward along the lower inclined plate 23. more than gas.

Here, the position of the tip 25a of the upper projecting plate 25 is a position forward of the position on the same vertical plane as the tip 22a of the upper tilting plate 22, and the upper projecting plate 25 is an extension of the upper tilting plate 22. A position that does not overlap the line L1, more specifically, a first oblique line L2 (see FIG. 6 See the dashed-dotted line in the middle.) When extending 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 oblique line L2 and 7, the amount of combustion gas discharged from the upper opening side is larger than the position on the same vertical plane as the tip 22a of the upper inclined plate 22. The combustion gas flowing upward along the inclined plate 22 does not form a flow of combustion gas directed toward the front wall 20 side of the windbreaker 17, and is hardly obstructed by the upper projecting plate 25, so that the upper inclined plate is formed. The air is smoothly exhausted to the outside at approximately the same inclination angle as 22 .

On the other hand, the tip 26a of the lower protruding plate 26 is positioned forward of the position on the same vertical plane as the tip position 25a of the upper protruding plate 25. A position that does not overlap with the extension line L1, more specifically, a second oblique line L3 (see FIG. 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 oblique line L3 and the bottom The lower projecting 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 projecting plate 25, forward of the position where the projecting plate 26 intersects. Since the position is located forward of the position, the flow of the combustion gas toward the lower surface opening includes a flow downward along the lower inclined plate 23 at substantially the same angle of inclination as the lower inclined plate 23 and a downward flow along the lower inclined plate 23 . There are two flows, the upward flow and the upward flow (see the two arrows shown between the lower sloping plate 23 and the lower overhanging plate 26 in FIG. 7). Therefore, the flow direction of the combustion gas discharged from the lower surface opening side becomes a direction that combines the above two flow directions, and as indicated by the arrow Hd in FIG. It becomes an inclination angle (an inclination angle in the direction away from the front panel 2a).

Furthermore, the projecting length of the lower projecting plate 26 is longer than the projecting length of the upper projecting plate 25, and the opening area of the lower surface opening is made smaller than the opening area of the upper surface opening. The amount of combustion gas discharged from the bottom opening is smaller than the amount of combustion gas discharged from the bottom opening, and the exit position of the combustion gas discharged from the bottom opening is ahead of the exit position of the combustion gas discharged from the top opening. Since the position is far from the face plate 2a, even if the area of the front plate 2a positioned below the exhaust port 5 is larger than that above the exhaust port 5, the combustion gas is less likely to hit the front plate 2a positioned below the exhaust port 5. It is possible to prevent the surface 2a from being stained with soot contained in the combustion gas, or from being discolored by the heat of the combustion gas.

In addition, since the lower opening is narrower than the upper opening, the flow velocity of the combustion gas when passing through the opening of the lower opening (the part not blocked by the lower projecting plate 26) is reduced. 7, the combustion gas flows through the bottom opening at an inclination angle closer to the horizontal, as indicated by the arrow Hd in FIG. It is vigorously discharged in a direction away from the front plate 2a. As a result, the exhaust port 5 is positioned above the front plate 2a, and even if the area of the front plate 2a positioned below the exhaust port 5 is large, the combustion gas does not hit that portion, and the exhaust port 5 does not reach the front plate 2a. It is possible to prevent the surface of the front plate 2a positioned below from being stained with soot contained in the combustion gas, or from being discolored by the heat of the combustion gas, and the appearance is not spoiled.

The present invention is not limited to the above-described embodiment. In this embodiment, the wind guard 17 and the rectifier 21 are independent members. The structure of the tool 21 (the guide plate 24, the upper protruding plate 25, and the lower protruding plate 26) may be combined into one member, and various modifications are possible without changing the gist of the invention. be.

In this embodiment, the combustion apparatus 1 is used as a hot water heating boiler that heats the fluid to be heated that is circulated to the heat radiating terminal 12. However, instead of the return pipe 13, the water supply pipe is connected to the water inlet side of the heat receiving pipe 8. , and a hot water outlet pipe instead of the feed pipe 14 is connected to the water outlet side of the heat receiving pipe 8, and the combustion device 1 may be used as a hot water heater that supplies hot water to a hot water tap provided at a predetermined location. be.

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

1 Combustion device 2 Case 3 Combustor 5 Exhaust port 17 Wind guard 20 Front wall 21 Rectifier 22 Upper inclined plate 23 Lower inclined plate 24 Guide plate 25 Upper projecting plate 26 Lower projecting plate L1 Extension line L2 First oblique line L3 Second diagonal line

Claims (3)

a combustor housed in a housing for heating a fluid to be heated; an exhaust port located in the upper part of the housing for discharging combustion gas generated by the combustor to the outside; and a windbreak means having a front wall covering the upper and lower surfaces of which are open, wherein the flow direction of the combustion gas discharged from the exhaust port is defined between the exhaust port and the windbreak means The rectifying means has a dogleg-shaped guide plate that guides the combustion gas discharged from the exhaust port obliquely forwardly upward and obliquely forwardly downward. The extension line of the plate portion to be formed is shaped so as not to overlap the front wall of the windbreak means, and the rectifying means has an upper projecting plate projecting forward above the exhaust port and the guide plate. In addition, a lower overhanging plate projecting forward is provided below the exhaust port and the guide plate, and the length of the lower overhanging plate is longer than the length of the upper overhanging plate. Combustion device. The guide plate has an upper inclined plate extending obliquely forward and upward and a lower inclined plate extending obliquely forward and downward as the plate portion forming the dogleg shape. 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 without the upper projecting plate overlapping the extension line of the upper inclined plate and the top end position of the lower overhanging plate is positioned on the same vertical plane as the top end position of the upper overhanging plate without overlapping the extension line of the lower inclined plate. 2. The combustion apparatus according to claim 1, wherein the position is located in front of the position of . The tip position of the upper projecting plate is positioned on the same vertical plane as the tip of the upper tilting plate, or the upper tilting plate does not overlap the extension line of the upper tilting plate, and the upper tilting plate is When a first oblique line forming substantially the same angle as the opening surface of the exhaust port with respect to the same vertical plane is extended forward from the upper end of the exhaust port, the upper inclined plate is located on the first oblique line. and the tip position of the lower overhanging plate is positioned at approximately the same angle as the angle that the lower inclined plate makes with respect to the same vertical plane as the opening surface of the exhaust port. extending forward from the lower end of the exhaust port, the lower overhanging plate is an extension of the lower inclined plate forward of the position where the second oblique line and the lower overhanging plate intersect. 3. The combustion apparatus according to claim 2, wherein the position does not overlap with the line and is positioned forward of a position on the same vertical plane as the tip position of the upper projecting plate.

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