JP6095312B2 - Exhaust hood and combustion equipment - Google Patents

Description

The present invention relates to an exhaust hood and a combustion device.

A combustion apparatus installed outdoors is provided with an exhaust port for exhausting exhaust gas from the combustion section to the outside. If foreign matter such as rainwater enters this exhaust port, not only will the combustion efficiency inside the combustion equipment deteriorate, but there is also a risk of causing problems in the combustion equipment body.
Therefore, a rainwater / foreign material intrusion prevention structure is provided at the exhaust port of the combustion device to prevent rainwater and foreign matter from entering the combustion device due to wind and rain, to protect the interior of the combustion device and to ensure stable combustion. There is a need.
For example, Patent Document 1 discloses an exhaust port structure in which the upper edge of the exhaust port protrudes from the lower edge to be equal to or higher than the height of the outlet of the exhaust port as a structure for preventing rainwater and foreign matter from entering. .

Japanese Utility Model Publication No. 5-79235

However, in the technique described in Patent Document 1, in order to completely block rainwater caused by wind and rain, the upper edge of the hood body in the exhaust port structure is equal to the vertical width of the outlet of the exhaust port from the lower side edge. It is necessary to make it protrude above. Therefore, the projecting dimension of the exhaust port structure becomes longer, the entire length of the combustion equipment becomes longer, and there is a problem that the installation space is restricted.
Moreover, the exhaust port structure described in Patent Document 1 has a shape in which a plurality of members are combined in a complicated manner, and there is a concern about an increase in manufacturing cost.

  The present invention has been made in view of the above-described conventional problems, and it is possible to prevent rainwater and foreign matter from entering from an exhaust port of an outdoor combustion device and to reduce the projecting dimension of the exhaust port structure. An object of the present invention is to provide a combustion device capable of reducing the overall length of the combustion device.

The present invention has the following configuration as means for solving the above-described problems.
(1) The present invention is an exhaust hood provided in an outdoor combustion device and provided in an exhaust port for exhausting exhaust gas, the exhaust hood serving as a flow path for the exhaust gas and having a flow path hole whose exhaust direction is a horizontal direction. A hood main body that protrudes in a horizontal direction so as to cover the periphery of the flow path hole, and a front end edge of the hood main body is inclined so that an upper end thereof protrudes with respect to a lower end thereof, and the hood A closing portion that closes the lower half of the flow path hole is formed along the inclination of the tip edge from the lower end portion of the main body, and the inclination of the closing portion and the inclination of the tip portion from the lower end portion of the hood main body are formed. Is an inclination of 45 degrees or more and 65 degrees or less with respect to the horizontal plane of the exhaust hood .

(2) A combustion device of the present invention is a combustion device in which the exhaust hood described in (1) is attached to an exhaust port portion of a housing, and an attachment peripheral portion is formed on the outer periphery of the hood main body. The peripheral edge portion is interposed in an annular recess formed around the exhaust port of the outer casing of the housing, and the attachment peripheral edge portion is screwed to the peripheral portion of the exhaust port of the housing .
(3) The present invention is characterized in that the mounting rim of the exhaust hood is interposed in an annular recess formed around the exhaust port of the outer casing of the housing via an interposed member that blocks heat.

According to the present invention, the leading edge of the hood body, inclined such the upper end portion of the leading edge protrudes with respect to the lower end, that is less 65 degrees 45 degrees with respect to the horizontal plane of the inclination, A portion of the leading edge that protrudes from the lower end of the leading edge serves as a trap for rainwater, and can prevent rainwater from entering the flow path hole.
In addition, by blocking the lower half of the channel hole with the closing portion inclined at an angle of 45 degrees or more and 65 degrees or less with respect to the horizontal plane, it is possible to reliably prevent the intrusion of rainwater and foreign matters that are caused by the cross wind.
In addition, the closed portion is inclined at 45 degrees or more and 65 degrees or less with respect to the horizontal plane along the inclination of the front end edge of the flow path hole to form a gentle inclination. Generation is reduced and exhaust efficiency is good.

In the case where the closed portion inclined at 45 degrees or more and 65 degrees or less is formed so as to close the lower half of the flow path hole, it is possible to more reliably prevent the intrusion of rainwater and foreign matter.
When the inclination of the front end edge of the hood body is set to 45 degrees or more and 65 degrees or less with respect to the horizontal plane, the projecting dimension of the exhaust hood can be reduced, and the overall length of the combustion equipment can be reduced.
In addition, since this exhaust hood has a simple structure, it can be integrally formed when it is press-drawn as a metal part, and can be manufactured at low cost.

It is a schematic diagram showing the operation principle of the combustion equipment which is one Embodiment of this invention. The combustion apparatus which is one Embodiment is an example of installation when installing in a bathroom as a wall penetration kettle, and shows a perspective view when it sees from a bathtub short surface. The front view of a combustion apparatus is shown. FIG. 4A is a rear view of the combustion device, and FIG. 4B is a side view. The cross-sectional enlarged view which expanded the exhaust port part shown in FIG.4 (b) is shown. FIG. 6A shows a front view of the exhaust hood, and FIG. 6B shows a side view.

  FIG. 1 is a schematic diagram illustrating the operating principle of a combustion device 1 to which an exhaust hood of the present invention is applied. Below, based on FIG. 1, the combustion apparatus 1 which concerns on this embodiment is demonstrated in relation to the flow of hot water, the flow of gas, etc. in addition to a basic structure.

The combustion apparatus 1 of the present embodiment includes a hot water supply combustion unit 15, a hot water supply primary heat exchanger 14 and a hot water supply secondary heat exchanger 13 provided thereon, a supplementary combustion unit 21, and an additional charge provided thereon.焚 A primary heat exchanger 19 and an additional secondary heat exchanger 20 are provided. Drain trays 5 are provided at the bottom of the portion from the hot water supply secondary heat exchanger 13 to the exhaust port 53 and at the bottom of the portion from the supplementary secondary heat exchanger 20 to the exhaust port 53, respectively, via the drain pipe 6. And connected to the neutralization vessel 7. A drain hose 8 is connected to the neutralization container 7.
In the combustion device 1 of this example, the hot water supply combustion unit 15, the hot water supply primary heat exchanger 14 and the hot water supply secondary heat exchanger 13, the additional combustion unit 21, the additional heat primary heat exchanger 19 and the additional secondary heat exchange. The combustion apparatus main body 1 </ b> A is generally configured by housing the chamber 20 in a housing (not shown). Moreover, the neutralization container 7 is provided inside the combustion equipment body 1A, and the exhaust hood (not shown in FIG. 1) of the present invention is provided at the exhaust port 53 of the combustion equipment body 1A. The neutralizing container 7 is filled with a necessary amount of a neutralizing agent such as calcium carbonate.

  First, the flow of hot water in the hot water supply function in the combustion device 1 shown in FIG. 1 will be described. Hot water is supplied from a water supply pipe connection 2 provided in the combustion apparatus main body 1A, and a water amount sensor 3 detects whether or not the hot water has reached a predetermined flow rate.

  Hot water that has passed through the water amount sensor 3 is guided to the hot water supply secondary heat exchanger 13 through the connection pipe 13A, and the hot water supply secondary heat exchanger 13 collects latent heat from the exhaust gas. The hot water from which the latent heat has been recovered is guided to the hot water supply primary heat exchanger 14 via the connecting pipe 14A, and the hot water supply primary heat exchanger 14 recovers sensible heat from the combustion gas. The hot water from which this sensible heat has been collected passes through the hot water supply pipe connection portion 22 that connects the hot water supply pipe 28 that supplies hot water to the bathroom via the connection pipe 22A, and is used from the hot water tap.

  Next, in the combustion apparatus 1 shown in FIG. 1, the flow of hot water in the reheating function will be described. By operating the circulation pump 40 provided inside the combustion apparatus main body 1 </ b> A, hot water in the bathtub 33 is supplied to the bath return pipe connection portion 25 via the circulation fitting 37 and the bath return pipe 31. The hot and cold water that has passed through the bath return pipe connecting portion 25 is guided to the tracking secondary heat exchanger 20 through the connecting pipe 20 </ b> A, and latent heat is recovered from the exhaust gas by the tracking secondary heat exchanger 20.

  The hot water from which this latent heat has been recovered is guided to the renewal primary heat exchanger 19 via the connecting pipe 19A, and the sensible heat from the combustion gas is recovered by this remnant primary heat exchanger 19. The hot water from which this sensible heat has been recovered passes through the bath outlet pipe connecting portion 24 connecting the bath outlet pipe 30 via the connecting pipe 24A, and is supplied into the bathtub 33 via the bath outlet pipe 30 and the circulation fitting 37. In the combustion apparatus 1 shown in FIG. 1, the connecting pipe 14A and the connecting pipe 19A are connected via the connecting pipe 18A, and a pouring electromagnetic valve 18 is provided at 18A.

Next, the flow of the fuel gas in the combustion device 1 shown in FIG. 1 will be described. In the hot water supply function, the fuel gas is supplied from the gas pipe connection portion 23 via the hot water supply gas electromagnetic valve 16 to the hot water supply combustion portion 15 via the connection pipe 15A and burns to generate high-temperature combustion gas. The combustion gas first passes through the hot water supply primary heat exchanger 14 and radiates sensible heat at that time. The low-temperature combustion gas after releasing sensible heat becomes exhaust gas.
Next, the exhaust gas passes through the hot water supply secondary heat exchanger 13 and radiates latent heat at that time. The exhaust gas that has radiated the latent heat is exhausted from the exhaust port 53 to the outside of the appliance, but a part of the exhaust gas enters the drain pipe 6 together with the drain water 44 described below.

  Similarly, in the remedy function, combustion gas is supplied to the remedy combustion section 21 via the remedy gas solenoid valve 17 via the connection pipe 17A and burned, and the generated combustion gas is remedied by the remedy primary heat exchanger 19. Then, it passes through the rechargeable secondary heat exchanger 20 and is exhausted from the exhaust port 53 to the outside of the appliance, and a part of the drain water 44 enters the drain pipe 6.

Next, the flow of the drain water 44 will be described. When latent heat is recovered from the exhaust gas by the hot water supply secondary heat exchanger 13 and the tracking secondary heat exchanger 20, the temperature of the exhaust gas decreases from about 200 ° C to about 60 ° C. At the same time, water vapor contained in the exhaust gas is condensed, and dew condensation water is generated in the hot water supply secondary heat exchanger 13 and the supplementary secondary heat exchanger 20.
The condensed water becomes a strongly acidic drain water 44 having a pH of about 3 including a nitrogen oxide component in the exhaust gas. For this reason, these drain waters 44 generated in the hot water supply secondary heat exchanger 13 and the supplementary secondary heat exchanger 20 are collected in the drain tray 5 for collecting them and connected to the drain tray 5. After passing through the drain pipe 6, it flows into the inlet of the neutralization vessel 7 filled with calcium carbonate.

The drain water 44 neutralized in the neutralization container 7 passes through the drain hose 8 and is drained to the outside through the drain pipe penetrating portion 12.
The neutralization container 7 is provided with a detector (not shown) that detects a rise in the water level, and can detect when the level of the drain water 44 in the neutralization container 7 has risen due to clogging of the drainage. You can notify or stop driving.

The combustion apparatus 1 which concerns on embodiment of this invention can be used as a wall penetration pot.
FIG. 2 is a view showing an installation example when the combustion device 1 is installed in a bathroom as a wall penetrating pot, and is a perspective view when viewed from the short side of the bathtub.

Various pipes are connected to the combustion device 1. These pipes include a water supply pipe 27 for supplying water to the wall penetration kettle, a hot water supply pipe 28 for supplying hot water heated by the wall penetration kettle into the bathroom, a gas pipe 29 for supplying fuel to the wall penetration kettle, It consists of a bath outlet pipe 30 and a bath return pipe 31 for circulatingly heating the bath water.
The bath outlet pipe 30 and the bath return pipe 31 are connected to a circulation fitting 37 attached to a bathtub 33. The hot water supply pipe 28 is connected to a faucet 38 installed on the upper edge surface of the bathtub 33. A removable apron 35 is attached to the bathtub 33.

  As a feature of the combustion device 1, piping such as water supply, hot water supply, and gas are all completed in the bathroom, and maintenance and the like are all performed from the bathroom. Combustion air is sucked into the appliance body from outside using an intake port 36 formed in the lower part on the outdoor side of the combustion device 1, and combustion exhaust gas is formed on the upper part on the outdoor side of the combustion device 1. It is discharged to the outdoors through the exhaust port 53 that is present. An exhaust hood 4 is attached to the exhaust port 53.

  The front view seen from the bathtub side of the combustion equipment 1 is shown in FIG. Below the combustion device 1, a water supply pipe connection 2 connected to the water supply pipe 27, a hot water supply pipe connection 22 connected to the hot water supply pipe 28, and a gas pipe connection connected to the gas pipe 29. And a bath return pipe connection part 24 connected to the bath return pipe 31. The main body front cover 26 provided inside the bathroom in the combustion device 1 is detachable, and is removed at the time of installation or maintenance.

4 (a) is a rear view of the combustion device 1, and FIG. 4 (b) is a side view. In addition, although the combustion apparatus 1 has the structure comprised by the exterior casing (casing) 51, in FIG. 4 (a), (b), a part of exterior casing 51 is seen through, and one part is seen through. Shown as a cross section.
An exhaust port 53 is provided in the upper part of the back surface which is an outdoor portion of the combustion device 1, and the exhaust hood 4 is provided in the exhaust port 53. The exhaust hood 4 has a structure that protrudes from the outer casing 51 of the combustion device 1.

  The exhaust port 53 is connected to the hot water supply secondary heat exchanger 13 and the tracking secondary heat exchanger 20. That is, the exhaust gas combusted in the hot water supply combustion unit 15 and passed through the hot water supply primary heat exchanger 14 and the hot water supply secondary heat exchanger 13 and combusted in the additional combustion unit 21, and the additional primary heat exchanger 19 and additional memory 2 are combusted. It plays the role of discarding the exhaust gas that has passed through the secondary heat exchanger 20 to the outside of the combustion device 1.

The hot water supply secondary heat exchanger 13 and the supplementary secondary heat exchanger 20 have an integral structure, and a part constituting the hot water supply secondary heat exchanger 13 and a part constituting the supplementary secondary heat exchanger 20 therein. A partition plate (not shown) for partitioning is provided.
Therefore, the exhaust gas after passing through the hot water supply secondary heat exchanger 13 or the supplementary secondary heat exchanger 20 and recovering the latent heat is discharged from the same exhaust port 53.

FIG. 5 shows an enlarged cross-sectional view of the exhaust port 53 shown in FIG. 4B, FIG. 6A shows a front view of the exhaust hood 4, and FIG. 6B shows a side view. Based on these, the structure of the exhaust hood 4 will be described in detail.
The exhaust hood 4 includes a flow path hole 52 serving as an exhaust gas flow path, a hood main body 4g that covers the periphery of the flow path hole 52 and protrudes in the horizontal direction, and a mounting peripheral edge formed on the peripheral edge of the hood main body 4g. 4e and is schematically configured.
In the present embodiment, the exhaust hood 4 is made of a metal material typified by steel, aluminum alloy, or stainless steel, but the material is not particularly limited.

As shown in FIG. 5, a channel hole 52 having a height A is formed in the center of the exhaust hood 4. Further, a hood main body 4g protruding in the horizontal direction is formed so as to cover the periphery. The exhaust gas discharged from the exhaust port 53 passes through the flow path hole 52 and is discharged to the outside.
The front edge 4h of the hood body 4g is formed so as to be inclined so that the upper end 4a of the front edge 4h protrudes more outward than the lower end 4b. The tip edge 4h is inclined at an inclination angle c with respect to the horizontal plane of the hood body 4g.

Therefore, the hood main body 4g has a shape in which the upper part protrudes greatly from the lower side with respect to the flow path hole 52, and the protruding amount gradually decreases from the upper side to the lower side on both sides of the flow path hole 52. It has become.
By having such a shape, the hood main body 4g plays a role of a trap for rainwater, and can effectively prevent rainwater from entering the flow path hole 52.

In addition, a blocking portion 4c having a height B that closes the flow path hole 52 is formed upward along the inclination of the leading edge 4h from the lower end portion 4b of the leading edge 4h in the hood body 4g.
By closing the lower portion of the flow path hole 52 with the blocking portion 4c, it is possible to reliably prevent the intrusion of rainwater and foreign matters that are caused by crosswind.
In addition, since the closed portion 4c is formed along the inclination of the tip edge 4h of the flow path hole 52, the generation of vortex flow is reduced in the flow path of the exhaust gas, and the exhaust efficiency is good.

  By the way, the falling angle of rainwater changes due to various factors such as the size of rainwater and the strength of wind. In consideration of the case where the rainwater is in the form of snow, sleet, hail, etc., it is difficult to optimize the height B of the blocking portion 4c and the inclination angle c of the tip edge 4h.

If the inclination angle c is reduced, the hood body 4g becomes longer, and the overall length of the combustion device 1 becomes longer. However, if it is too large, the effect of preventing intrusion of rainwater becomes insufficient, leading to a decrease in exhaust efficiency due to an increase in exhaust resistance.
On the other hand, if the height B of the blocking portion 4c is too high, the flow path of the exhaust gas becomes narrow and efficient exhaust cannot be performed. However, if it is too low, the effect of preventing rainwater intrusion is still insufficient.

The inventors of the present invention have made extensive studies to block the closed portion 4c from the lower side of the height A of the flow path hole 52 (ie, the height B = A of the closed portion 4c). / 2) In addition, the inclination angle c of the tip edge 4h is preferably set to 45 degrees or more and 65 degrees or less.
In particular, by setting the inclination angle to about 60 degrees, it is possible to reliably prevent the intrusion of rainwater and foreign matters that are caused by crosswinds while ensuring a sufficiently wide flow path, and the hood body 4g is necessary. It has been found that it is most preferable since it does not become longer than that, and the projecting dimension of the exhaust hood 4 can be reduced and the overall length of the combustion device 1 can be reduced.
The exhaust hood 4 can be integrally formed by metal press drawing. As a result, the number of parts can be reduced, and it can be manufactured at low cost.

As shown in FIG. 5, the tip end 4h of the exhaust hood 4, hemmed have been made, hemmed portion 4d ₁ is formed by folding back the upper end portion 4a side of the leading edge 4h inwardly toward both sides, the tip end hemmed portion 4d ₂ folded back inwardly at the lower end portion 4b side of 4h are formed.
As a result, the tip edge 4h can be reinforced, and burrs and fractured surfaces formed during pressing are not exposed to the outside, which is preferable.
Further, curling may be performed instead of hemming.

As shown in FIGS. 6 (a) and 6 (b), the exhaust hood 4 has a mounting peripheral edge 4e formed on the outer periphery thereof. Three attachment holes 4f, 4f, and 4f are provided in the attachment peripheral edge 4e.
As shown in FIG. 5, the exhaust hood 4 is attached so as to cover the exhaust port 53 provided in the outdoor back surface portion of the combustion device 1. An attachment peripheral portion 4e of the exhaust hood 4 is formed in an annular shape formed around an intermediate member 54 that cuts off the heat of the hot water supply secondary heat exchanger 13 and the tracking secondary heat exchanger 20 and the exhaust port 53 of the outer casing 51. The exhaust hood 4 can be fixed to the outer surface of the outer casing 51 by interposing between the recesses 51a and screwing the screws through the mounting holes 4f, 4f and 4f.

Although various embodiments of the present invention have been described above, each configuration in each embodiment and combinations thereof are examples, and additions, omissions, substitutions of configurations, and the like can be made without departing from the spirit of the present invention. And other changes are possible. The present invention is not limited by the embodiment.

1 ... burning appliance, 1A ... burning appliance body, 2: feed water pipe connecting portion, 3 ... water sensor, 4 ... exhaust hood, 4a ... upper portion, 4b ... lower portion, 4c ... occlusion, _4d 1, 4d 2 _... hemming Processed part, 4e ... Mounting peripheral edge part, 4f ... Mounting hole, 4g ... Hood body, 4h ... Tip edge, 5 ... Drain pan, 6 ... Drain pipe, 7 ... Neutralization container, 8 ... Drain hose, 12 ... Drain pipe penetration , 13 ... Hot water supply secondary heat exchanger, 13A, 14A, 15A, 17A, 18A, 19A, 20A, 22A, 24A ... Connection piping, 14 ... Hot water supply primary heat exchanger, 15 ... Hot water supply combustion section, 16 ... Hot water supply gas Solenoid valve, 17 ... Remembrance gas solenoid valve, 18 ... Molten water solenoid valve, 19 ... Remembrance primary heat exchanger, 20 ... Remembrance secondary heat exchanger, 21 ... Remembrance combustion part, 22 ... Hot water supply pipe connection part , 23 ... Gas pipe connection part, 24 ... Bathing pipe connection part, 25 ... bath return pipe connection part, 26 ... body front cover, 27 ... water supply pipe, 28 ... hot water supply pipe, 29 ... gas pipe, 30 ... bath return pipe, 31 ... bath return pipe, 33 ... bath, 35 ... apron, 36 ... Intake port, 37 ... circulation fitting, 38 ... water tap, 40 ... circulation pump, 44 ... drain water, 51 ... exterior casing (housing), 52 ... flow path hole, 53 ... exhaust port, 54 ... interposition member, A, B ... Height, c ... Inclination angle

Claims (4)

An exhaust hood provided in an outdoor combustion device and provided in an exhaust port for exhausting exhaust gas,
The exhaust gas flow path is provided with a flow path hole whose exhaust direction is horizontal, and has a hood body that protrudes in a horizontal direction so as to cover the periphery of the flow path hole. Inclined so that its upper end protrudes from its lower end,
A closing portion that closes the lower half of the flow path hole is formed along the inclination of the tip edge from the lower end of the hood body ,
The exhaust hood is characterized in that the inclination of the closing portion and the inclination of the front end portion from the lower end portion of the hood main body are 45 degrees or more and 65 degrees or less with respect to a horizontal plane of the exhaust hood. A combustion apparatus, wherein the exhaust hood according to claim 1 is attached to an exhaust port portion of a housing. A mounting peripheral edge is formed on the outer periphery of the hood main body, the mounting peripheral edge is interposed in an annular recess formed around the exhaust outlet of the outer casing of the casing, and the mounting peripheral edge is disposed on the exhaust outlet of the casing. The combustion apparatus according to claim 2, wherein the peripheral part is screwed . The combustion apparatus according to claim 3, wherein an attachment peripheral portion of the exhaust hood is interposed in an annular recess formed around the exhaust port of the outer casing of the casing via an interposition member that blocks heat. .

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