JP2011208853A - Combustion device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a combustion device capable of preventing exhaust gas from butting to an adjacent wall, etc.SOLUTION: An oblong exhaust pipe 17 is provided on the front surface of an appliance case 40, and the exhaust gas is exhausted via the exhaust pipe 17 from an outlet port 18 provided on the side surface of the exhaust pipe. The outlet port 18 is provided with a louver 19 for regulating the flow direction of the exhaust gas. The louver 19 is formed by aligning/arranging a plurality of blades 21 obliquely to be spaced from each other in the longitudinal direction of the appliance case 40. On a rear side surface and a front side surface on the front and the back of each blade 21, the rear side surface is made to be a laminar flow forming surface 32, and the front side surface is made to be a guide surface 33 of the exhaust gas. The guide surface 33 is formed with a tapered surface 22 which projects so that a projection amount to the front side can be larger toward the end side on the downstream side of the exhaust gas flow. The tapered surface 22 is made to be a forcible guide surface which forcibly guides a feeding direction of the exhaust gas to a predetermined direction on the diagonally front side.

Description

  The present invention relates to a combustion apparatus in which a burner is provided in an instrument case.

  FIG. 16 schematically shows an example of the combustion apparatus. This combustion apparatus 1 is a latent heat recovery type water heater, and a burner (hot water supply burner) 14 is disposed in a combustion chamber 20 provided in an instrument case 40. A gas pipe 42 for supplying fuel to the burner 14 is connected to the burner 14. The gas pipe 42 is connected to an on-off valve (not shown) for controlling fuel supply / stop to the burner 14, and to the burner 14. A proportional valve (not shown) capable of controlling the amount of supplied fuel with the valve opening is interposed.

  A combustion fan 5 for supplying and exhausting combustion of the burner 14 is provided below the burner 14. As shown by the arrows in FIG. 2, this water heater supplies air that is sucked in from the outside through the intake port 9 to the burner 14 by the rotation of the combustion fan 5, and is supplied through this air and the gas pipe 42. The combustion gas generated by the burner combustion is sent to the exhaust port 8 side from the combustion chamber 20 by the rotation of the combustion fan 5 and exhausted.

  A main heat exchanger (primary heat exchanger) 4 for recovering sensible heat in the combustion gas of the burner 14 is provided on the upper side of the burner 14, and the flow of the combustion gas from the main heat exchanger 4. Is provided with a latent heat recovery heat exchanger (secondary heat exchanger) 6 for recovering the sensible heat and latent heat of the combustion gas on the downstream side (here, the upper side of the main heat exchanger 4). Combustion devices have been released in recent years. The main heat exchanger 4 has a pipe 12 through which hot water passes and a plurality of plate-like plates arranged in parallel with each other in the longitudinal direction of the pipe 12 in a manner of projecting to the outer peripheral side of the pipe 12. And fins 13. The latent heat recovery heat exchanger 6 also includes a pipe line 2 through which hot water passes and a plurality of pipes 2 arranged in parallel with each other in the longitudinal direction of the pipe line 2 so as to project to the outer peripheral side of the pipe line 2. It has a plate-like fin 3.

  Under the latent heat recovery heat exchanger 6, an appropriate drain discharge means for discharging the drain generated in the latent heat recovery heat exchanger 6 to the outside is provided. In the water heater shown in this figure, a drain tray 48 and a drain pipe 49 connected to the tray 48 are provided as drain discharge means. The leading end side of the drain pipe 49 is led out of the instrument case 40 (for example, the lower side of the water heater), and the condensed water droplets (drain drainage) accumulated in the tray 48 are discharged to the outside through the drain pipe 49. It has become. Since the drainage is acidic because it contains nitrogen oxides (NOx) in the combustion gas, the drain discharge means is provided with a drain neutralization means 50 for neutralizing the drainage (drain). It has been.

  A water supply pipe 46 for guiding water from a water supply source is connected to the inlet side of the latent heat recovery heat exchanger 6, and the inlet of the main heat exchanger 4 is connected to the outlet side of the latent heat recovery heat exchanger 6. The side is connected. A hot water supply pipe 47 is connected to the outlet side of the main heat exchanger 4. Normally, the water supply pipe 46 includes a water thermistor (not shown) for detecting the temperature of water supplied from the water supply pipe 46 and flowing into the latent heat recovery heat exchanger 6, and the latent heat recovery heat exchanger 6. A water amount sensor (not shown) for detecting the flow rate of water flowing into the hot water supply pipe 47 is provided, and a hot water thermistor (not shown) capable of detecting the temperature of the hot water flowing out is provided in the hot water supply pipe 47. Yes.

  Combustion control of the burner 14 and rotation control of the combustion fan 5 are performed according to a sequence program given in advance by combustion control means provided in a control device (not shown) based on the detection signals of the respective sensors. As described above, the burner 14 is combusted by the gas supplied from the gas pipe 42 and the air sent by the combustion fan 5, whereby the latent heat recovery heat exchanger 6 and the main heat are supplied from the water supply pipe 46. The hot water produced through the exchanger 4 in order is led to a hot water supply place such as a kitchen via a hot water supply pipe 47 and discharged.

  In such a water heater provided with the latent heat recovery heat exchanger 6, the water passing through the water pipe in the latent heat recovery heat exchanger 6 from the water supply pipe 46 is composed of the combustion gas generated by the combustion of the burner 14 as the latent heat recovery heat. When passing through the exchanger 6, the latent heat possessed by the water vapor in the combustion gas is removed (collecting latent heat) to increase the temperature, and when passing through the main heat exchanger 4, the combustion thermal power of the burner 14 Therefore, hot water having a set temperature is produced by heating, so that efficient heating can be performed by the burner 14.

  That is, by providing the heat exchanger 6 for recovering latent heat, for example, in a water heater, the thermal efficiency reaches about 90% or more on a high heating value (total heating value) basis, and the heat exchanger 6 for recovering latent heat is provided. High thermal efficiency is achieved compared to a normal water heater without. The exhaust gas of the combustion device such as the water heater is exhausted from the exhaust port 8 while the heat is taken away by the latent heat recovery heat exchanger 6, so that the temperature is relatively low at about 50 to 80 ° C. Since the humidity is almost 100%, the specific gravity is larger and the exhaust gas is heavier than the exhaust gas of a water heater of the type that does not have the latent heat recovery heat exchanger 6.

  By the way, there are various exhaust configurations of the combustion apparatus. As an example, as shown in FIG. 17, for example, an alcove type combustion apparatus 1 in which a horizontally long exhaust cylinder 17 is provided on the front surface of the instrument case 40 is used. (For example, refer to Patent Document 1). In this combustion apparatus 1, for example, as shown in FIG. 18, an exhaust port 8 for exhaust gas is provided on the front surface of the instrument case 40, and the exhaust port 17 is covered by an exhaust cylinder 17 with an interval therebetween. As shown in FIG. 4, the flow of exhaust gas discharged from the exhaust port 8 to the front side of the instrument case 40 is changed to the left or right side of the exhaust cylinder 17 on the front side of the instrument case 40 (in this example, the combustion device 1 It is configured to discharge toward the right side). In addition, FIG. 18 has shown the instrument case 40 with the top view, and the exhaust pipe 17 has shown with typical sectional drawing.

  As shown in FIGS. 17A and 17B, one end side of the exhaust pipe 17 in the longitudinal direction (in this example, the left end side toward the combustion device 1) is closed, and the other end side (in this example, the combustion device 1). The exhaust gas outlet 18 is provided on the side surface thereof on the right end side), and the louver 19 is provided in the outlet 18. As shown in FIG. 18, the plurality of blades 21 forming the louver 19 are arranged with a space in the front-rear direction of the instrument case 40, and each blade 21 is arranged on the downstream end side of the exhaust gas flow. The case 40 is disposed obliquely toward the front. As shown in the plan view of FIG. 19, each wing plate 21 is formed of a substantially flat plate whose end is bent and folded (hemmed).

  In such an alcove-type combustion apparatus 1, for example, as shown in FIG. 18, the combustion apparatus 1 is embedded (built-in) so that the front surface of the instrument case 40 is flush with the wall 10. Only the exhaust gas that has passed through the exhaust cylinder 17 is discharged from the side surface of the exhaust cylinder 17.

JP-A-2005-214502

  However, as described above, the combustion apparatus 1 having the latent heat recovery heat exchanger 6 has a lower temperature (50 to 80 ° C.) than the exhaust gas of a water heater of the type not having the latent heat recovery heat exchanger 6. Because the humidity is almost 100%, instead of the conventional non-latent heat alcove type combustion apparatus 1 that does not have the latent heat recovery heat exchanger 6, the main body of the combustion has the latent heat recovery heat exchanger 6 When the apparatus 1 is applied, there is a possibility that condensation occurs on the wall surface when the exhaust gas hits the surface of the wall 10.

  Therefore, in order to prevent the condensation on the wall surface, the angle of the louver 21 of the louver 19 was set to be a steep angle as compared with the conventional case. However, the change in the direction of the exhaust gas discharged was not successful, and as shown in FIG. It has been found that the exhaust gas diffuses when exhausted from the outlet 8 of the exhaust cylinder 17 and hits the surface of the wall 10 adjacent to the combustion device. Moreover, even if the angle of the slat 21 is changed to a steep angle, there is no effect of changing the direction of the exhaust gas. As a result, when the alcove type combustion device 1 is formed by the latent heat recovery type combustion device, FIG. Condensation occurred on the surface of the wall 10 in the region indicated by A, causing corrosion of the wall 10.

  The present invention has been made in order to solve the above-mentioned problems, and its purpose is to prevent adverse effects such as the formation of condensation on adjacent walls and the corrosion of wall surfaces caused by the exhaust gas of the combustion device. An object of the present invention is to provide a combustion device that can be used.

  In order to achieve the above object, the present invention has the following configuration as means for solving the problems. That is, according to the first aspect of the present invention, there is provided a louver that is provided with an exhaust port for exhausting exhaust gas from a burner provided in the instrument case, and that regulates the flow direction of the exhaust gas exhausted from the exhaust port. The plurality of slats provided to form the louver are arranged with a space between each other, and each slat has a laminar flow forming angle with respect to the exhaust gas flow on one side of the slat opposite to the front and back surfaces. The laminar flow forming surface is formed, and the other plate surface is a guide surface for guiding the flow of the exhaust gas, and the guide surface is directed toward the end portion on the downstream side of the flow of the exhaust gas. There is a problem with a configuration in which a tapered surface protruding so as to increase the protruding amount is formed, and the tapered surface forms a forced guide surface that forcibly guides the exhaust gas delivery direction in a predetermined setting direction. As a means to solve .

  According to a second aspect of the invention, in addition to the configuration of the first aspect of the invention, an exhaust port for the exhaust gas is provided on the front surface of the instrument case, and the front side of the instrument case is connected to the front side of the instrument case from the exhaust port. There is provided a horizontally long exhaust pipe that discharges the flow of exhaust gas discharged to the left or right side on the front side of the instrument case, and the exhaust pipe is spaced from the exhaust port via a gap. One end side in the longitudinal direction of the exhaust tube is closed, and the other end side is provided with the exhaust gas outlet on the side surface, and the exhaust gas exhausted from the outlet is provided on the side. A louver that regulates the direction of the flow is provided, and each vane that forms the louver is arranged obliquely with the downstream end side of the exhaust gas flow forward and spaced apart from each other in the front and rear direction. Rear side and front side facing the front and back of the board Of these, the rear side surface is a laminar flow forming surface, the front side surface is an exhaust gas guide surface, and the front surface becomes closer to the downstream end side of the exhaust gas flow toward the guide surface. A taper surface protruding so as to increase the amount of protrusion is formed, and the taper surface forms a forcible guide surface for forcibly guiding the exhaust gas delivery direction in a predetermined direction obliquely forward. It is characterized by that.

  Further, according to a third aspect of the invention, in addition to the configuration of the first aspect, the wing plates forming the louver are arranged obliquely with the downstream end side of the exhaust gas flow facing upwards and spaced apart from each other. Of the lower and upper surfaces facing each front and back of each slat, the lower surface is a laminar flow forming surface, and the upper surface is an exhaust gas guide surface. The exhaust gas flow is formed with a taper surface protruding so as to increase in the upward direction as it goes toward the downstream end portion, and the taper surface preliminarily moves the exhaust gas delivery direction diagonally upward. It is characterized by a forced guide surface that forcibly guides in a defined direction.

  Further, according to a fourth aspect of the invention, in addition to the configuration of the first aspect of the invention, the blades forming the louver are arranged obliquely with the downstream end side of the exhaust gas flow downward and spaced apart from each other vertically. Of the upper and lower surfaces facing the front and back of each slat, the upper surface is a laminar flow forming surface, and the lower surface is an exhaust gas guide surface, A tapered surface is formed on the surface such that the amount of protrusion downward increases as it goes toward the downstream end of the exhaust gas flow, and the tapered surface defines the exhaust gas delivery direction obliquely downward. It is characterized by a forced guide surface that forcibly guides in a predetermined direction.

  Further, in the fifth invention, in addition to the configuration of the first invention, the plurality of slats forming the louver are spaced from each other in the left-right direction of the instrument case, and the downstream end side of the exhaust gas flow is It is arranged obliquely toward the guide side direction on either side of the left and right direction, and the surface on the opposite side to the guide side direction among the left and right surfaces facing the front and back of each slat is laminar The amount of protrusion in the guide side direction as it forms the formation surface and the surface in the guide side direction forms the guide surface of the exhaust gas, and toward the downstream end of the exhaust gas flow toward the guide surface A tapered surface protruding so as to increase is formed, and the tapered surface forms a forced guide surface that forcibly guides the exhaust gas delivery direction in a predetermined direction obliquely forward to the guide side direction. It is characterized by being.

  Furthermore, in the sixth aspect of the invention, in addition to the configuration of any one of the first to fifth aspects, a main heat exchanger that absorbs sensible heat in the combustion gas is provided above the burner, A latent heat recovery heat exchanger for recovering exhaust latent heat is provided downstream of the main heat exchanger in the flow of the combustion gas, and water passing through the latent heat recovery heat exchanger is used as heat for recovering latent heat. The preheated water is supplied to the water inlet of the main heat exchanger and heated by the main heat exchanger.

  In the present invention, there is provided a louver that regulates the flow direction of the exhaust gas of the burner discharged from the exhaust port. Each of the slats forming the louver has a laminar flow forming surface formed at a laminar flow forming angle with respect to the flow of the exhaust gas, and a plate surface on the other side. Is a guide surface that guides the flow of exhaust gas, so that exhaust gas flows while forming a laminar flow along the laminar flow forming surface on one side of the slats, and on the other side The discharge direction is forcibly guided along a guide surface by a forcible guide surface formed by the tapered surface in a predetermined setting direction, and is discharged (delivered).

  Therefore, for example, if the combustion apparatus is disposed at a position where the exhaust port is in the vicinity of the wall surface, and the exhaust gas is discharged without being forcedly guided by the forced guide surface, the exhaust gas is discharged from the exhaust port. Even in an arrangement that hits a nearby wall surface or the like, the exhaust gas can be prevented from hitting the wall surface or the like by forcibly guiding the exhaust gas sending direction in the set direction by the forced guide surface. Therefore, even if the combustion device is equipped with a latent heat recovery type heat exchanger and exhausts low-temperature, high-humidity exhaust gas, it can prevent condensation on the wall surface and prevent problems such as wall corrosion. Can do. A high-efficiency combustion apparatus can be realized by providing a latent heat recovery heat exchanger to form a combustion apparatus.

  Further, in the present invention, an exhaust port for exhaust gas is provided on the front surface of the instrument case, a horizontally long exhaust tube is provided on the front surface of the instrument case, and exhaust gas discharged from the exhaust port to the front side of the instrument case is provided. A louver configured to discharge the flow toward the left or right side on the front side of the instrument case, and restricting the flow direction of the exhaust gas at the exhaust gas outlet provided on the side surface The exhaust gas passing through the exhaust pipe can be discharged while forming a laminar flow along each louver of the louver, and the tapered surface formed on the guide surface of the slat is formed as a forced guide surface. Thus, the exhaust gas can be forcibly guided and sent in a predetermined direction obliquely forward.

  Further, in the present invention, each slat forming the louver is arranged obliquely with the downstream end side of the exhaust gas flow upward and downward with a space therebetween, and the lower surface of the slat is defined as a laminar flow forming surface In the configuration in which the upper surface of the slat is a guide surface, exhaust gas can be discharged while forming a laminar flow along each louver of the louver, and the tapered surface formed on the guide surface of the slat is By forming the forcible guide surface, the exhaust gas can be forcibly guided and sent in a predetermined direction obliquely upward. Therefore, even if there are walls or shrubs that are as high as the exhaust port of the combustion device in the vicinity of the combustion device, the exhaust gas does not hit the walls or shrubs, causing condensation on the wall surface, It can prevent the shrub from being adversely affected.

  Further, in the present invention, the louvers that form the louvers are arranged obliquely with the downstream end side of the exhaust gas flow downward and spaced apart from each other, and the upper surface of the louvers is a laminar flow forming surface In the configuration where the lower surface of the slat is a guide surface, exhaust gas can be discharged while forming a laminar flow along each louver of the louver, and the tapered surface formed on the guide surface of the slat is By forming a forced guide surface, the exhaust gas can be forcibly guided and sent in a predetermined direction obliquely downward. Therefore, in this configuration, when there is an obstacle such as a leaning wall in front of the combustion device, it is possible to prevent condensation from occurring on the obstacle.

  Furthermore, in the present invention, each of the plurality of slats forming the louver is spaced from each other in the left-right direction of the instrument case, and the downstream end side of the exhaust gas flow is directed to the guide side direction on either side of the left-right direction. Of the left and right surfaces facing the front and back of each slat, the surface on the opposite side to the guide side direction forms a laminar flow forming surface, and the surface in the guide side direction is the exhaust gas. The exhaust gas can be discharged while forming a laminar flow along each louver blade, and the tapered surface formed on the guide surface of the louver is used as a forced guide surface. The exhaust gas can be forcibly guided and sent in a predetermined direction obliquely forward of the guide side direction. Accordingly, when a wall, a staircase, or the like is provided on the front side of the combustion apparatus and it is desired to send the exhaust gas to the oblique front side avoiding them, the exhaust gas can be sent in the direction in which it is desired to be sent.

  In other words, as described above, the present invention provides a combustion device that can discharge exhaust gas in an appropriate direction according to the location of the combustion device, and is provided near the location of the combustion device. Exhaust gas can be discharged without adversely affecting the walls and trees that are being used.

It is explanatory drawing (a) which shows one Example of the combustion apparatus which concerns on this invention, its partially expanded view (b), and the perspective view (c) of a louver. It is a top view which shows the structure of the slat applied to the combustion apparatus of an Example. It is a disassembled perspective view for demonstrating the exhaust pipe provided in the combustion apparatus of an Example, and its attachment structure. It is explanatory drawing which shows the example of arrangement | positioning structure of the combustion apparatus of an Example. It is a schematic diagram for demonstrating the arrangement | positioning angle of the blade which forms a braid | blade, and the flow of exhaust gas. It is a plane explanatory view showing another example of a blade of a blade provided in the combustion device of the present invention. It is a perspective view (a), (b) and a top view (c) figure showing appearance composition of a combustion device of other examples. It is explanatory drawing which shows the Example which applied this invention to the standard exhaust type combustion apparatus. It is explanatory drawing which shows the Example which applied this invention to the combustion apparatus of the arrangement | positioning type | mold in a door. It is explanatory drawing which shows the Example which applied this invention to another combustion apparatus of the arrangement | positioning type | mold in a door. FIGS. 9 and 10 are explanatory diagrams (a) and (b) for explaining the arrangement example of the combustion apparatus and the exhaust gas discharge direction in the arrangement example, respectively, and a schematic diagram for explaining the arrangement example of the windproof glass. It is a typical perspective view (c). In the conventional combustion apparatus, it is explanatory drawing for demonstrating the example which must provide exhaust extension piping with the arrangement | positioning location. It is explanatory drawing which shows the Example which applied this invention to the combustion apparatus which discharges | emits exhaust gas toward diagonally downward. It is explanatory drawing which shows another Example of the combustion apparatus of this invention. It is explanatory drawing which shows another Example of the combustion apparatus of this invention. It is explanatory drawing which shows the system structural example of the combustion apparatus provided with the latent heat recovery type heat exchanger. It is explanatory drawing which shows the example of an alcove type combustion apparatus. It is explanatory drawing of the conventional alcove type | mold combustion apparatus and its problem. It is explanatory drawing which shows the blade of the braid | blade provided in the conventional alcove type | mold combustion apparatus.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the description of the present embodiment, the same reference numerals are assigned to the same names as those in the conventional example, and the duplicate description is omitted or simplified.

  FIG. 1A schematically shows an embodiment of a combustion apparatus according to this embodiment together with the adjacent wall 10. In this figure, the instrument case 40 side is shown by a plan view, and the exhaust tube 17 side is shown by a schematic cross-sectional view. The external appearance of the combustion apparatus 1 of this embodiment is substantially the same as that of the conventional example shown in FIG. 17, and the system configuration in the instrument case 40 is the same as that of the conventional example. FIG. 4 schematically shows an arrangement configuration example of the combustion apparatus 1 of the present embodiment. This embodiment is different from the conventional example in that the plurality of blades 21 forming the blades 19 provided in the exhaust gas outlet 18 of the exhaust cylinder 17 have a different configuration from the conventional example. In other words, the blade 19 is configured to regulate the flow direction of the exhaust gas. As shown in FIG. 3, the exhaust cylinder 17 has a cylinder main body 23 and a cover 27, and FIG. 1A shows only the cylinder main body 23.

  In the present embodiment, as shown in FIG. 1 (a), each blade 21 has a laminar flow forming angle θ (the limit of θ Since it is generally 20 ° to 30 °, θ is preferably 30 ° or less. Here, it forms a laminar flow forming surface 32 formed at, for example, 20 °), and the plate surface on the other side guides the flow of exhaust gas. 33, and the guide surface 33 is formed with a taper surface 22 protruding so as to increase in the amount of protrusion toward the downstream end of the exhaust gas flow. This is a forcible guide surface that forcibly guides the sending direction of the ink in a predetermined setting direction. The laminar flow forming angle θ changes depending on the number of hot water discharged from the hot water supply (amount of supplied fuel) and the exhaust gas temperature that changes when the feed water temperature changes, and becomes an unstable situation in which it is difficult to form a laminar flow from around 20 degrees. It is generally at an angle greater than 30 degrees that no laminar flow is formed.

  FIG. 2 shows an enlarged plan view of one slat 21. As shown in this figure, the slat 21 is folded in a streamlined manner at its end, This folded surface forms a tapered surface 22. The angle γ (see FIG. 1A) of the tapered surface 22 with respect to the exhaust gas is 20 degrees or more and is formed at 35 degrees larger than θ, and each blade 21 is formed as shown in FIG. As shown in FIG. 4, the plate portion 37 having the laminar flow forming surface 32 of each wing plate 21 is stretched, and the holding plate portion 37 whose both ends are bent at 90 degrees is formed on the top louver frame 35, and the spot indicated by D in the figure. It is fixed in such a manner that it is sandwiched from both upper and lower sides by welding. In addition, since the top louver frame 35 is finally fixed to the instrument case 40 via the cylinder main body 23 and the like, each wing plate 21 is in a fixed state without being vibrated even when exhausted. It is made.

  In FIGS. 1A and 1B, reference numeral 99 denotes a tapered surface of a cover member 28 (see FIG. 3) inserted into the cylinder main body 23, and an angle C of the tapered surface 99 with respect to the exhaust gas. Is formed at 30 degrees. Reference numeral 36 denotes an exhaust change plate that changes the flow of exhaust gas by approximately 90 degrees and stabilizes the flow of exhaust that hits each vane plate 21 using the space to each vane plate 21 as an exhaust flow direction stabilization space. Yes.

By the way, the laminar flow forming angle (which is 30 degrees or less and approximately 20 degrees in the case of the present embodiment) in which the blades 21 of the present embodiment are arranged, as shown in FIG. Humidity of about 100% as indicated by arrow A with respect to the plate indicated by B (having two curved surfaces, C and D, and a wedge-shaped model with sharp exhaust points), an exhaust temperature of 50 to 80 ° C., For example, an exhaust gas whose composition is CO ₂ : 5.5%, H ₂ O: 10.9%, N ₂ : 78.1%, O ₂ : 5.5%, for example, a flow rate of 5 to 20 m / The angle at which the exhaust gas forms a laminar flow along the plate B when flowing at s (the exhaust gas laminar flow forming angle in the latent heat recovery combustion device).

  That is, when the angle with respect to the flow direction of the exhaust is 0 degree (the blades 21 are arranged in parallel with the flow of the exhaust), the flow flows without disturbance to the surfaces on both sides of the blade 21 (laminar flow). And even if the angle of the wing plate 21 is changed to the laminar flow formation angle, the flow flows without disturbance to the surfaces on both sides of the wing 21 (laminar flow). However, here, for example, as shown in FIG. 5B, if the angle with respect to the flow direction of the exhaust is θ ′ deeper than the laminar flow formation angle (larger and greater than the critical angle of attack), the exhaust of the plate B is The side that hits (exhaust or receives positive pressure), that is, the side below the plate B in the figure, but the exhaust flows along the plate but does not hit the exhaust (does not receive exhaust or negative pressure) That is, a part of the exhaust gas goes straight above the plate B so that the exhaust gas does not flow along the plate B, and a vortex U is generated at a portion where the flow deviates from the plate, resulting in a turbulent flow.

  Since the flow direction of the exhaust gas cannot be changed as expected due to the generation of the vortex U (for example, the exhaust gas hits the wall), even if the angle of the plate B with respect to the exhaust gas is deeper (larger), the flow is not removed from the plate. The only difference is that the vortex U is large. That is, when the angle of the plate B with respect to the exhaust gas flow of the plate B is larger than the laminar flow formation angle θ, the correlation between the angle of the plate B and the exhaust flow change angle is lost due to the generation of the vortex U. It is considered that the exhaust flow direction cannot be controlled.

  Regarding the generation of the vortex U and the flow of exhaust gas as described above, if the shape of the plate B is described as the shape of the conventional slat 21 shown in FIG. 19 (flat plate model), as shown in FIG. When the angle of the plate B with respect to the flow of exhaust gas is larger than the laminar flow formation angle (about 30 degrees or less) (FIG. 5 (c) is an example of 30 degrees that becomes almost unstable), A small vortex U is generated in the negative pressure side upper portion (the portion where the exhaust gas first hits the plate B) (see U1), and the vortex U gradually moves to the rear of the plate B (the tip side of the exhaust gas flow). (Refer to U2, U3, and U4 in order), and when the vortex U leaves the tail of the plate B (see U5), the negative pressure side exhaust gas of the plate B travels substantially straight (relative to the exhaust gas). The angle goes in the direction of 0 degrees).

  Then, while the positive pressure side exhaust gas of the plate B flows along the plate B, the angle at which the exhaust gas wants to flow is 30 degrees. Regardless, there are times when the exhaust gas travels substantially straight (the angle with respect to the exhaust gas advances in the direction of 0 degrees), and it is considered that the exhaust gas hits the wall 10 at this time.

  On the other hand, in this embodiment, the angle of the wing plate 21 with respect to the exhaust gas (negative pressure side angle) is, for example, a laminar flow forming angle of 20 degrees, and one plate surface (rear surface) facing the front and back of the wing plate 21. Is formed with a laminar flow forming surface 32 at an angle at which exhaust gas flows through the guide surface 33 on the front surface (positive pressure side) which is the other surface of the slat 21 (or an angle slightly larger than the angle at which exhaust gas is to flow). For example, by using a reverse wedge type model in which a tapered surface 22 of 35 degrees is formed and the exhaust flows into a sharp point, the exhaust gas is discharged while forming a laminar flow along each blade 21 of the louver 19. The exhaust gas is discharged by being guided by a tapered surface 22 formed on the positive pressure side of each slat 21.

  That is, in this embodiment, since the vortex U that causes the exhaust gas to go straight against the direction of the tapered surface 22 cannot be formed, it is shown in the enlarged view on the outlet 18 side of the exhaust cylinder 17 shown in FIG. As shown in the figure, the exhaust gas is sent in a preset direction on the diagonally forward side (an angle with respect to the flow of the exhaust gas is about 35 degrees). 10, even if low-temperature, high-humidity exhaust gas is discharged from the combustion apparatus 1 of this embodiment provided with the latent heat recovery type heat exchanger 6, it is possible to prevent condensation on the wall surface and to corrode the wall 10. Etc. can be prevented.

  Further, the exhaust gas flowing along the laminar flow forming surface 32 of the slat 21 and the exhaust gas flowing along the tapered surface 22 eventually merge, but the end of the laminar flow forming surface 32 of the slat 21 and the taper are tapered. The smaller the space in the three points of the end of the surface 22 and the confluence, the smoother the merge, and a vortex (a type of vortex that is not a vortex that causes condensation on the wall surface like the vortex U) is formed. However, in this embodiment, the end portion is connected by the aspect R to reduce the space portion in three points, and even if the child thrusts the finger with mischief, the point where the exhaust flowed is not sharp, Since the tip of the slat 21 is a phase R, it has a shape that reduces vortex generation and prevents injury.

  By the way, although the low-temperature and high-humidity exhaust gas is discharged from the combustion apparatus 1 of the present embodiment provided with the latent heat recovery type heat exchanger 6, the exhaust gas becomes white smoke as is well known in winter. In order to reduce such white smoke, it is preferable to diffuse the exhaust gas early. The slat 21 applied to the present embodiment has a small amount of vortex v as shown in FIG. 2 because the downstream side of the exhaust flow (the destination into which the exhaust flows) is not pointed and the tip is a phase R. (A type of vortex that is not a vortex that causes condensation on the wall surface like the vortex U) occurs, and the exhaust gas meanders in a small amount. By this small amount of meandering, the exhaust gas diffuses early without losing straightness (such as hitting a wall), thereby reducing white smoke. The angle difference between γ and θ that causes this meandering is preferably greater than 0 and 20 degrees or less.

  However, with the generation of a small amount of vortex v, the slat 21 receives stress (vibration). Therefore, in this embodiment, spot welding is performed at the spot welded portion shown by D in FIG. 1 (c), and the blade 21 has a plate portion having the laminar flow forming surface 32 and a plate portion forming the tapered surface 22. And, as described above, stress concentration (generation of vibration) is prevented by pressing (fixing) both ends of the wing plate 21 with the pressing plate portion 37.

  In addition, although the form of the said exhaust pipe 17 provided in the combustion apparatus 1 and its attachment structure are not specifically limited, In a present Example, it has a structure as shown in FIG. As shown in the figure, the exhaust cylinder 17 has a cylinder body 23 and is attached by attaching the cylinder body 23 to an attachment plate 25 via a packing tool 24. The mounting plate 25 is fixed to the front surface of the instrument case 40 via a frame 26 by screwing, and a cover 27 that covers the upper and lower sides, the front surface, and the left end side of the cylinder body 23 is attached to the mounting plate 25. A blade 19 is provided on a side surface on the right end side of the cylinder main body 23, and a frame-shaped cover member 28 is provided on an attachment portion of the blade 19 and is fixed to the cover 27.

  In addition, this invention is not limited to the said Example, It sets suitably. For example, in the above embodiment, the wing plate 21 forming the louver 19 has a configuration as shown in FIG. 2, but the wing plate 21 is bent into a shape as shown in FIG. 6A, for example. May be formed. The difference between this example and the above example is that the end of the slat 21 and the end of the tapered surface 22 are connected in the aspect R in the above example, whereas in the example shown in FIG. , The plane H is connected. Even in the shape as shown in FIG. 6 (a), since the tip is flat, the child can avoid injuries even if he / she thrusts his / her finger in the same manner as in the previous embodiment, and exhaust gas (such as hitting the wall) ) It can diffuse quickly without losing straightness, thus reducing white smoke.

  Moreover, as shown in FIG.6 (b), the wing board 21 may be formed with the board which becomes thick as it goes to an end side. In this case, the end of the plate may be curved as shown by a solid line, or may be flat as shown by a chain line. Further, as shown in FIG. 6 (c), the slat 21 has an elliptical surface (the tip is a phase) instead of a simple phase, so that the space portion in three points can be further reduced. Good. Further, as shown in FIG. 6 (d), the wing plate 21 is disposed at a laminar flow forming angle θ with respect to the exhaust gas (the surface opposite to the exhaust gas delivery direction is the laminar flow forming surface 32). It is good also as a multistage shape which added the board of the laminar flow formation angle (theta) to the tip of the laminar flow formation surface 32 of the slat 21). Moreover, as shown in FIG.6 (e), you may form the taper surface 22 in the curved surface form instead of flat form. Moreover, as shown in FIG.6 (f), you may make the laminar flow formation surface 32 and the taper surface 22 of the slat 21 substantially the same length.

  Moreover, the shape and arrangement | positioning aspect of the exhaust pipe 17 are not necessarily the aspect which covers the left end from the right end of the instrument case 40 like the said Example, For example, as shown to Fig.7 (a), the instrument case 40 is shown. It may be provided in such a manner that it protrudes from both the left and right sides, or it may be provided in a manner that protrudes only from the left and right ends. Furthermore, as shown in FIG.7 (b), you may provide from the middle part of the instrument case 40 to one end side (right side toward the combustion apparatus 1 in this figure). In FIG. 7C, the exhaust delivery direction in the combustion apparatus 1 of the aspect shown in FIG. 7B is schematically shown using arrows.

  In the examples described so far, the exhaust gas outlet 18 is formed on the right side of the exhaust cylinder 17 and the louver 19 is provided on the outlet 18. Alternatively, an exhaust gas outlet 18 may be formed, and a louver 19 may be provided in the outlet 18.

  Further, in the above-described embodiment, the wall surface condensation prevention in the combustion apparatus provided with the alcove type latent heat recovery type heat exchanger 6 is described as an example, but some types of combustion apparatus provided with the latent heat recovery type heat exchanger 6 include There is a combustion apparatus 1 of a type called a standard exhaust type that is installed facing a common corridor of a condominium or is installed facing a veranda, for example, as shown in FIG. Further, in the vicinity of the emergency staircase, a combustion apparatus 1 of a type called an in-door installation type, for example, as shown in FIGS. 9 and 10 may be used. Furthermore, even if it is installed facing the shared corridor of the apartment, if the glass (windproof screen) is fitted on the opposite side of the corridor corresponding to the front of the appliance, it is called the above-mentioned in-door installation type A type of combustion device may be used. The present invention can be applied to various types of combustion apparatuses such as these.

  For example, as shown in FIG. 8A, in the combustion apparatus 1 of a type called a standard exhaust type in which a louver 19 is provided on the front surface of the instrument case 40 of the combustion apparatus 1, each blade 21 that forms the louver 19 is In place of the conventional flat plate as shown in FIG. 19, as shown in the frame A of FIG. However, the downstream end side of the exhaust gas flow may be arranged obliquely upward. In this case, of the lower and upper surfaces facing the front and back of each slat 21, the lower surface is formed as a laminar flow forming surface 32, and the upper surface is formed as an exhaust gas guide surface 33. The guide surface 33 is formed with a taper surface 22 that protrudes so that the amount of protrusion upward increases toward the downstream end of the exhaust gas flow. Is a forcible guide surface that forcibly guides in a predetermined direction obliquely upward.

  By forming in this way, as shown by the arrow in FIG. 8B, the exhaust gas in the combustion apparatus 1 is directed obliquely upward at an angle larger than the laminar flow formation angle θ with respect to the horizontal direction. For example, it is possible to prevent dew condensation from occurring on the handrail on the non-equipment installation side of the common corridor of the apartment or on the handrail of the veranda, and to prevent corrosion of the handrail and the like.

  Further, in the in-door combustion apparatus 1 having the latent heat recovery type heat exchanger 6 as shown in FIGS. 9 and 10, conventionally, a slat 21 is provided at the exhaust top (the tip of the short exhaust cylinder 17). 19 or a flat wing plate 21 as shown in FIG. 19 is provided on the exhaust top, and either left or right with respect to a surface T perpendicular to the front surface of the instrument case 40. In addition, an exhaust gas that can be exhausted obliquely forward toward an angle of 15 degrees or an angle of 30 degrees is used. Even in such an in-door combustion apparatus, by applying the configuration of the present invention, the exhaust gas can be sent to the surface T in a direction inclined at a large angle exceeding the laminar flow forming angle θ. .

  That is, in the combustion apparatus 1 shown in FIGS. 9 and 10, each of the plurality of slats 21 forming the louver 19 has an instrument case as shown in a frame A in FIGS. 9B and 10B. 40 in the left-right direction, and the downstream end side of the exhaust gas flow is the guide side direction on either side of the left-right direction (in FIGS. (Tilt right). Of the left and right surfaces facing the front and back of each slat 21, the surface opposite to the guide side direction (that is, the left surface in FIGS. 9 and 10) is formed in a laminar flow. A surface in the guide side direction (that is, the right side surface in FIGS. 9 and 10) forms an exhaust gas guide surface 33. Further, the guide surface 33 is formed with a tapered surface 22 that protrudes so that the amount of protrusion in the guide side direction increases toward the downstream end of the exhaust gas flow.

  Then, the tapered surface 22 is formed as a forcible guide surface that forcibly guides the exhaust gas delivery direction in a predetermined direction obliquely forward to the guide side direction, whereby FIG. 9B and FIG. As shown by the solid line arrows in (b), the exhaust gas can be sent (discharged) in the diagonally right direction of the figure, where the angle with respect to the surface T is inclined larger than the laminar flow forming angle θ. If the arrangement of the slats 21 is opposite to the above and the left side toward the combustion device 1 is the guide side direction, as shown by the broken-line arrows in FIGS. Exhaust gas can be discharged in the diagonally left direction of the figure, where the angle with respect to T is inclined larger than the laminar flow formation angle θ.

  Therefore, for example, as shown in FIG. 11, these combustion devices 1 are made of glass or the like by avoiding a windscreen 39 such as an obstacle or glass on the opposite side of the corridor 30 corresponding to the front of the combustion device 1. The exhaust can be guided to a place where it does not stay so that it does not stay in the hallway. 11A shows an example in which the combustion apparatus 1 of FIG. 9 is applied, and FIG. 11B shows an example in which the combustion apparatus 1 of FIG. 10 is applied. FIG. 11C is a perspective view showing the arrangement of the windproof screen 39 together with the leaning wall 43 and the handrail 44.

  Further, for example, as shown in FIG. 12 (a), when the exhaust delivery direction is not set to an angle θ ′ larger than 30 degrees with respect to the surface T, the exhaust gas directly hits the facing wall 45. When the exhaust gas delivery direction is 30 degrees or less with respect to the surface T, the exhaust gas is cooled by the wall 45 and stays in the corridor 30, and when the outside air temperature is low, there is a possibility that condensation occurs on the wall surface. is there. In addition, if there is a sash or a door where it stays, it may cause discoloration or corrosion. Therefore, in such a case, conventionally, as shown in FIG. 12B, the exhaust extension pipe 38 had to be provided. However, in the combustion apparatus of the present invention, θ = 30 degrees, γ = 45 degrees (γ−θ is preferably 0 to 20 degrees), the exhaust delivery direction can be made larger than 30 degrees with respect to the surface T without providing the exhaust extension pipe 38. The combustion apparatus 1 can be installed without providing the extension pipe 38.

  Furthermore, as shown in FIG. 13, the present invention can be applied to a configuration in which exhaust gas is sent out downward. In this case, as shown in a frame A in the figure, the blades 21 forming the louver 19 are arranged in the vertical direction with a space between them as a shape applied to the above embodiment, and the downstream end of the exhaust gas flow Place it diagonally with the side facing down. Of the lower and upper surfaces facing the front and back of each slat 21, the upper surface is the laminar flow forming surface 32, and the lower surface is the exhaust gas guide surface 33. The guide surface 33 is formed with a taper surface 22 that protrudes so that the amount of protrusion upward increases toward the downstream end of the exhaust gas flow. This is a forcible guide surface that forcibly guides the delivery direction in a predetermined direction obliquely upward.

  Furthermore, as shown in FIGS. 14 and 15 (a), the present invention can also be applied to the combustion apparatus 1 in which the exhaust port 8 is provided on the side surface of the instrument case 40. In this case, the exhaust port 8 is provided with a louver 19, and in the combustion apparatus 1 shown in FIG. 14, by applying the configuration of the louver 19 provided in the outlet 18 of the exhaust cylinder 17 in the above embodiment, the exhaust gas is The laminar flow can be sent toward the oblique front side beyond the laminar flow forming angle θ. Further, in the combustion apparatus 1 shown in FIG. 15 (a), as shown in FIG. 15 (b), the configuration of the louver 19 in the combustion apparatus 1 shown in FIG. It can be sent obliquely upward beyond the formation angle θ.

  Furthermore, the system configuration of the combustion apparatus of the present invention is not particularly limited, and is set as appropriate. The combustion apparatus 1 including the latent heat recovery heat exchanger 6 may be used as in the above embodiment. Alternatively, the combustion apparatus 1 may not include the latent heat recovery heat exchanger 6. Further, the system configuration of the combustion apparatus having various configurations such as a configuration having a reheating heat exchanger for reheating and a configuration having a hot water storage tank can be applied to the present invention.

  The combustion apparatus of the present invention can regulate the exhaust gas discharge direction, for example, can prevent the exhaust gas from hitting an adjacent wall, and can be used as an alcove type combustion apparatus, for example.

DESCRIPTION OF SYMBOLS 1 Combustion device 8 Exhaust port 9 Intake port 14 Burner 17 Exhaust tube 18 Outlet port 19 Louver 21 Wing board 22 Tapered surface 23 Cylinder body 32 Laminar flow formation surface 33 Guide surface 37 Holding plate part

Claims (6)

  An exhaust port for exhausting exhaust gas from a burner provided in the instrument case is provided in the instrument case, and a louver for regulating the flow direction of exhaust gas exhausted from the exhaust port is provided to form the louver. A plurality of slats are arranged with a space between each other, and each slat has a laminar flow forming surface in which a plate surface on one side facing the front and back is formed at a laminar flow forming angle with respect to the flow of the exhaust gas. The other plate surface is a guide surface that guides the flow of exhaust gas, and the guide surface protrudes so that the amount of protrusion increases toward the downstream end side of the exhaust gas flow. A combustion apparatus, wherein a tapered surface is formed, and the tapered surface forms a forced guide surface for forcibly guiding the exhaust gas delivery direction in a predetermined setting direction.   Exhaust gas exhaust ports are provided on the front surface of the instrument case, and the front surfaces of the instrument case allow the flow of exhaust gas discharged from the exhaust port to the front side of the instrument case on the front side of the instrument case. A horizontally long exhaust pipe that discharges toward one of the sides is provided, the exhaust pipe covers the exhaust port with a gap, and one end side in the longitudinal direction of the exhaust pipe is closed. The end side is provided with the exhaust gas outlet on the side surface, and the outlet is provided with a louver that regulates the flow direction of the exhaust gas discharged from the outlet, and each of the louvers is formed. The slats are arranged diagonally with the downstream end of the exhaust gas flow forward and backward with a distance from each other in the front-rear direction, and the rear side and the front side of each slat facing the rear side The front surface is the laminar flow forming surface, and the front surface is the exhaust A tapered surface is formed on the guide surface so that the amount of protrusion toward the front side increases toward the downstream end of the exhaust gas flow. The combustion apparatus according to claim 1, wherein the exhaust gas is formed as a forcible guide surface for forcibly guiding the exhaust gas delivery direction in a predetermined direction obliquely forward.   The louvers that form the louver are arranged diagonally with the downstream end of the flow of exhaust gas facing upward and downward with a space between them, and the lower and upper surfaces facing the front and back of each louver The lower surface is a laminar flow forming surface, the upper surface is an exhaust gas guide surface, and the upper surface is directed toward the downstream end portion of the exhaust gas flow toward the guide surface. A taper surface protruding so as to increase the amount of protrusion is formed, and the taper surface forms a forced guide surface for forcibly guiding the exhaust gas delivery direction in a predetermined direction obliquely upward. The combustion apparatus according to claim 1.   The louvers that form the louvers are arranged at an angle with the downstream end of the exhaust gas flow downward and spaced downward from each other, with the upper and lower surfaces facing the front and back of each louver. Of which the upper surface is a laminar flow forming surface, the lower surface is an exhaust gas guide surface, and the lower side of the guide surface toward the downstream end side of the exhaust gas flow. A taper surface protruding so as to increase the amount of protrusion is formed, and the taper surface forms a forced guide surface for forcibly guiding the exhaust gas delivery direction in a predetermined direction obliquely downward. The combustion apparatus according to claim 1.   Each of the plurality of slats forming the louver is disposed obliquely with the downstream end side of the exhaust gas flow directed toward the guide side direction in one of the left and right directions, with a space between each other in the left and right direction of the instrument case. Of the left and right surfaces facing the front and back of each slat, the surface opposite to the guide side direction is a laminar flow forming surface, and the guide side direction surface is an exhaust gas guide surface. And a tapered surface is formed on the guide surface so that the amount of protrusion in the guide-side direction increases toward the downstream end of the exhaust gas flow. The combustion apparatus according to claim 1, wherein a forcing guide surface is forcibly guided in a predetermined direction obliquely forward to the guide side direction.   A main heat exchanger that absorbs sensible heat in the combustion gas is provided on the upper side of the burner, and a latent heat recovery unit that recovers latent heat of exhaust gas is provided downstream of the flow of the combustion gas from the main heat exchanger. A heat exchanger is provided, and water passing through the latent heat recovery heat exchanger is preheated with the heat of latent heat recovery, and the preheated water is supplied to the water inlet of the main heat exchanger. The combustion apparatus according to any one of claims 1 to 4, wherein the combustion apparatus is configured to be heated by a heat exchanger.

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