JP2007010300A - Gas supply and exhaust structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a gas supply and exhaust structure capable of certainly suppressing and preventing occurrence of a short cycle even when the flow velocity of exhaust gas become slower than before. <P>SOLUTION: A flange member 5, a speed increasing member 6, an exhaust top 4, and a drain receiver 7 are joined to the tip of an exhaust pipe 3 inserted into an attaching hole 21 of an outer wall 2 of a building, and are fixed to the outer wall with the flange member. The speed increasing member is provided with a through hole 61 with an opening cross-sectional area smaller than passage cross-sectional area of the exhaust pipe, and the passing exhaust gas is speeded up. The forming position of the through hole is made eccentric downward so that the lowest edge 611 of the through hole is positioned at the lowest position of an internal wall surface 30 of the exhaust pipe, thereby making the exhaust gas drain flow down from the exhaust pipe to a drain hole 46. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to, for example, a hot water heater, a bath tub, a hot water circulating heater, or a combustion apparatus such as a combination thereof, which is used to supply combustion air and exhaust gas. Concerning structure.

  Conventionally, as this type of air supply / exhaust structure, a supply cylinder is provided on the outer peripheral side of the exhaust pipe to form a double cylinder, and an air supply opening is provided at the rear side position of the exhaust top that protrudes outward from the outer wall of the building. While opening, the front air supply port is opened at the upper part of the front plate of the exhaust top so that it communicates with the air supply port, so that a short cycle of exhaust gas due to the back wind (the exhaust gas is pushed against the wind) In order to suppress or reduce the occurrence of recirculation by flowing into the air supply port (see, for example, Patent Documents 1 to 3).

  As another air supply / exhaust structure, in addition to the above-described double cylindrical air supply / exhaust integrated type, as shown in FIG. 11, for example, extended piping for both exhaust and air supply from the combustion device D There is also known an individual type in which the exhaust top 103 and the air supply top 104 are arranged in horizontal positions after the 101 and 102 are extended independently from each other and individually penetrate the outer wall 2 of the building. In this case, there is a possibility that the short cycle of the exhaust gas described above occurs mainly when a cross wind is received. That is, the exhaust gas emitted from the exhaust top 103 receives a cross wind and travels to the supply air top 104, and the exhaust gas is taken in from the supply air top 104 and recirculation of the exhaust gas occurs. Such an individual type exhaust top 103 has a structure in which the exhaust top 103 is connected to the tip of the exhaust tube 300 penetrating the outer wall 2 as shown in FIG. A flange member 5 is connected, and a drain receiver 7 is attached to a lower position of the exhaust top 103.

JP-A-9-126444 JP-A-9-126445 JP-A-9-126446

  By the way, in recent years, in order to further improve the thermal efficiency of combustion equipment, a latent heat recovery type combustion equipment has been developed that recovers the latent heat from exhaust gas after heat exchange heating of the heat exchanger, for example, with combustion heat. Yes. This is downstream of the primary heat exchanger, which is the original heating target by combustion, and is provided so as to cross the secondary heat exchanger in the middle of the exhaust gas exhaust passage, and the exhaust gas is exhausted by this secondary heat exchanger. Trying to recover the latent heat.

  However, in the case of such a latent heat recovery type, the exhaust gas temperature is lower because it recovers the latent heat of the exhaust gas. As a result, in the case of the conventional type in which no secondary heat exchanger is interposed Compared with, the flow rate of the exhaust gas in the vicinity of the exhaust top becomes slow (for example, about 2/3). For this reason, even if the wind is weaker than before, there is a risk that the tendency to cause a short cycle in which the exhaust gas emitted from the exhaust top is pushed against the wind and flows into the supply side may be increased.

  The present invention has been made in view of such circumstances, and an object of the present invention is to reliably suppress and prevent the occurrence of a short cycle even when the exhaust gas flow rate tends to be slower than the conventional one. The object is to provide an air supply / exhaust structure. At the same time, measures against drainage generated from exhaust gas can be secured.

  To achieve the above object, according to the present invention, an exhaust pipe for deriving exhaust gas from a combustion device, a supply cylinder for introducing outside air into the combustion device, and an exhaust top coupled to the tip of the exhaust tube The exhaust top is provided with speed increasing means for forcibly narrowing the opening through which the exhaust gas passes to increase the flow speed of the exhaust gas. 1).

  In the present invention, since the opening through which the exhaust gas passes is forcibly narrowed by the speed increasing means, the exhaust gas is increased in speed when passing through the opening and blown out from the exhaust top to the outside in the accelerated state. Will be. For this reason, even if it receives a wind, it will become difficult to flow into the front end side of a supply cylinder, and generation | occurrence | production of a short cycle will be suppressed and prevented. Such an air supply / exhaust structure is a double-cylinder system in which an exhaust pipe is disposed on the inside and a supply cylinder is disposed on the outside, even in an individual-type air supply / exhaust structure in which an exhaust top and an air supply top are spaced apart from each other. Any of the supply / exhaust air supply / exhaust structures can be applied, and the above-described effects can be obtained by applying the present invention.

  As the speed increasing means of the present invention, a part of the passage through which the exhaust gas passes is partitioned at the back surface of the exhaust port of the exhaust top so that the opening through which the exhaust gas passes is made narrower than the passage cross-sectional area of the exhaust pipe. The speed increasing member can be constituted (claim 2). As a result, the speed increasing means of the present invention is further embodied, and the above-described action is also specifically obtained. In particular, the above-described effects of the present invention can be obtained by simply adding a speed increasing member inside the exhaust port, and since it is not necessary to make any changes in the appearance and the like, it has been conventionally used. It is also possible to share the exhaust cylinder and the supply cylinder.

  Further, the speed increasing means of the present invention is constituted by a speed increasing member interposed in a passage through which exhaust gas passes at the back position of the exhaust port of the exhaust top, and an opening through which the exhaust gas passes is connected to this speed increasing member. In addition, a through hole formed so as to be narrower than a cross-sectional area of the exhaust pipe may be provided. This also embodies the speed increasing means of the present invention. That is, since the exhaust gas is accelerated when passing through the through hole, the above-described action of the present invention can be specifically obtained. As in the case of claim 2, the above-described effect according to the present invention can be obtained only by adding a speed increasing member to the inside of the exhaust port, and the appearance and the like are not changed at all. Therefore, it is possible to share an exhaust pipe and a supply cylinder that are conventionally used. Further, in this case, the speed increasing member may be provided with an opening that allows passage of the exhaust gas drain at a position corresponding to the lowest position of the exhaust pipe. (Claim 4). Although the formation position and shape of the through hole may be unspecified, by providing an opening that allows passage of the exhaust gas drain at the position as described above, the exhaust gas drain generated on the exhaust cylinder side is not accumulated on the exhaust cylinder side, and the exhaust It becomes possible to flow down to the top side, and exhaust gas drain can be discharged without any trouble.

  Further, the speed increasing means of the present invention can be constituted by a blocking wall portion formed so that an opening cross-sectional area of the exhaust port is narrower than a passage cross-sectional area of the exhaust pipe in the front wall constituting the exhaust top ( Claim 5). Thereby, the speed increasing means of the present invention is more concrete. That is, since the opening of the exhaust port is throttled by the blocking wall portion, the exhaust gas is accelerated and blown out to the external space when it exits the exhaust port. For this reason, the operation of the present invention can be obtained specifically.

  Any one of the above-described supply / exhaust structures may be provided with a drain receiver for temporarily storing the exhaust gas drain below the exhaust top (Claim 6). As a result, dripping of the exhaust gas drain into the external space is avoided.

  Further, when the speed increasing means is constituted by the closed wall portion of the above-mentioned claim 5, the exhaust gas drain is temporarily put on the inner bottom portion of the exhaust top by forming the closed wall portion on the lower half side of the front wall. Alternatively, the drain receiver that is stored may be partitioned (Claim 7). By doing in this way, it is not necessary to provide a drain receiver outside, and the drain receiver is easily formed inside, so that the appearance of the appearance is improved.

  As described above, according to the air supply / exhaust structure of any one of claims 1 to 7, the exhaust gas can be accelerated by forcibly narrowing the opening through which the exhaust gas passes by the speed increasing means. As a result, occurrence of a short cycle can be suppressed / prevented.

  In particular, according to claim 2, the speed increasing means of the present invention can be made more concrete by the speed increasing member that partitions a part of the passage through which the exhaust gas passes. The above-described effects of the present invention can be obtained only by adding a speed increasing member to the inside of the exhaust port, and the exhaust pipe which has been used conventionally without any change in appearance and the like. And a common cylinder can be shared.

  According to the third aspect of the present invention, the speed increasing means of the present invention can be further embodied by the speed increasing member provided with the through hole. As in the case of claim 2, the effect of the present invention can be obtained only by adding a speed increasing member to the inside of the exhaust port, and the conventional one without any change in appearance and the like. It is possible to share the exhaust cylinder and the supply cylinder used from the beginning. Further, according to the fourth aspect based on this assumption, the exhaust gas drain generated on the exhaust cylinder side can be reliably flowed down to the exhaust top side without accumulating on the exhaust cylinder side.

  According to the fifth aspect, the speed increasing means of the present invention can be made more specific by the blocking wall portion formed on the front wall.

  According to the sixth aspect, it is possible to prevent the exhaust gas drain from flowing into the external space.

  According to the seventh aspect, it is possible to eliminate the necessity of providing a drain receiver on the outside, and it is possible to easily form the drain receiver inside, and to improve the appearance of the appearance.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

<First Embodiment>
FIG. 1 shows an air supply / exhaust structure according to a first embodiment of the present invention. Reference numeral 2 in the figure denotes an outer wall of a building to which the air supply / exhaust structure is applied, and reference numeral 21 denotes an attachment hole penetrating the outer wall 2. The air supply / exhaust structure of the first embodiment is configured by additionally installing a speed increasing member 6 for increasing the flow rate of exhaust gas on the exhaust side on the premise of the individual type air supply / exhaust structure shown in FIG. . 1 and 1 are exaggerated for the sake of illustration, and the thickness and inclination of each member formed of a plate material are exaggerated, and the state of attachment and assembly is easy to understand. Partly drawn large in size.

  The exhaust top in this air supply / exhaust structure includes an exhaust cylinder 3 that passes through the mounting hole 21 in the inner and outer directions, and an exhaust top that is connected to the tip of the exhaust cylinder 3 so as to be exposed to the outside from the outer wall 2. 4, a flange member 5, a speed increasing member 6, and a drain receiver 7. The exhaust cylinder 3 is installed so as to be inclined downward toward the outside with respect to the mounting hole 21, and the exhaust gas drain generated by cooling the exhaust gas while passing through the exhaust cylinder 3 or the like does not return to the inside. I am doing so. The base end side (upstream end side) of the exhaust pipe 3 is connected to an extension pipe 101 extended from the combustion device D (see FIG. 11).

  The exhaust top 4 has a front wall 41, a cylindrical wall 42, and a mounting piece 43, and exhaust ports 44, 44,. The exhaust ports 44, 44,... Extend sideways and are formed in a slit shape, and are provided with louvers 45, 45,. Each louver 45 is obliquely oriented so as to have a downward slope toward the outside, and exhaust gas is blown obliquely downward with respect to the outer space to be discharged. Further, a drain hole 46 is formed in the lowermost position of the front wall 41 so as to lead the exhaust gas drain to the external drain receiver 7.

  The flange member 5 is formed in a substantially donut shape. As will be described later, the exhaust tube 3, the exhaust top 4 and the speed increasing member 6 are mutually coupled, fixed to the outer wall 2, and the mounting hole 21 is formed. It plays the role of closing / makeup to shield the gap. The fixing to the outer wall 2 is performed by concrete screws or anchor screws 51 that are penetrated in, for example, three places around the periphery.

  As shown in FIG. 2, the speed increasing member 6 is formed by forming a through hole 61 having a predetermined opening cross-sectional area in a flat plate material. The through hole 61 is set such that its opening cross-sectional area is smaller than the passage cross-sectional area of the exhaust tube 3. As a result, the exhaust gas flowing through the exhaust tube 3 passes through the through hole 61 so that the flow velocity is increased. In the case shown in FIG. 2, for example, if the inner diameter of the exhaust tube 3 (the diameter of the inner wall surface 30) is 100 mm, a circular hole having an inner diameter of 80 mm is formed as the through hole 61. In addition, the through hole 61 is formed such that its lowermost edge 611 is located at the same position or below the lowermost position of the inner wall surface 30 of the exhaust tube 3. This ensures that the exhaust gas drain generated in the exhaust cylinder 3 flows to the exhaust top 4 side.

  In order to ensure that the exhaust gas drain flows to the side of the exhaust top 4 even if the operator attaches the speed increasing member 6 upside down by mistake in assembling the exhaust top or the like, reference numeral 62 in FIG. The through-hole shown by may be formed in advance. Such a through hole 62 may be formed at a position that includes the inner wall surface 30 of the exhaust tube 3, and may be a concave groove that extends to the outer periphery of the speed increasing member 6 instead of the through hole. The speed increasing member 6 is integrally coupled to the flange member 5 by a screw 52 in a state of being sandwiched between the distal end portion of the exhaust tube 3 and the mounting piece 43 of the exhaust top 4. The attachment holes denoted by reference numeral 63 in FIG. 2 are formed at predetermined positions on the outer peripheral side in order to insert the screws 52. Each of the mounting holes 63 may be formed in a concave groove shape instead of the hole. In addition to the above, the speed increasing member 6 may be attached by various means such as welding, and various other forms of coupling with the flange top 5 and the exhaust cylinder 3 together with the exhaust top 4 may be adopted. Also good.

  The drain receiver 7 is formed in a container shape (see also FIG. 11) that opens upward, and receives and stores exhaust gas drain flowing down or dripping from the drain hole 46 of the exhaust top 4. . The drain receiver 7 is shown in a state of being supported by being coupled to the attachment piece 43 of the exhaust top 4 in the drawing, but the coupling target and coupling means such as screws or welding may be variously changed. . The drain receiver 7 stores the exhaust gas drain until it evaporates by natural evaporation.

  In the case of the present embodiment, when the exhaust gas flowing from the combustion device D (see FIG. 11) through the exhaust cylinder 3 passes through the through hole 61 of the speed increasing member 6, the passage cross-sectional area is narrowed from that of the exhaust cylinder 3. Therefore, the exhaust gas is increased in flow rate and blown out from the exhaust port 44 with the flow rate increased. For this reason, even if the combustion device D is of the latent heat recovery type and the exhaust gas temperature is low and the exhaust gas flow rate is slow, the combustion device D can be blown up to the external space immediately before being discharged from the exhaust top. it can. Thereby, generation | occurrence | production of the short cycle resulting from a cross wind can be suppressed effectively. Further, the addition of the speed increasing member 6 can surely discharge and collect the exhaust gas drain without hindering the discharge of the exhaust gas drain.

  As another aspect of the present embodiment, a modified example of the speed increasing member 6 is shown below. In addition, the same code | symbol as what was demonstrated above is attached | subjected to the thing similar to the above. The speed increasing member 6a shown in FIG. 3A has a circular hole having a predetermined inner diameter (for example, the same inner diameter as the through hole 61 in FIG. 2) as the through hole 61a in a coaxial arrangement with the inner wall surface 30 at the tip position of the exhaust tube 3. Formed. A recess 612 is formed at the lowermost portion of the through hole 61a and recessed on the outer peripheral side (lower side) to a position at least matching the inner wall surface 30, and the bottom edge through which the exhaust gas drain passes through the bottom of the recess 612. 611 is configured.

  The speed increasing member 6b shown in FIG. 3 (b) includes a through hole 61b formed at the same position as the through hole 61a of the speed increasing member 6a in FIG. 3 (a), and a recess 612 of the speed increasing member 6a. Instead, at least a position including the lowermost edge portion 611 and a through hole 64 formed in a size are provided.

  The speed increasing member 6c shown in FIG. 4 (a) includes, as a through hole 61c, a peripheral edge 613 that passes through the same arc position in the lower half of the projection position of the inner wall surface 30 at the tip of the exhaust tube 3, and a chord on the upper side A shape having a portion 614 is formed. That is, the through hole 61 c corresponds to a closed upper portion of the circular hole that matches the inner wall surface 30. Then, a recess 615 that is recessed to a position below the inner wall surface 30 is formed at the lowermost edge portion, so that the exhaust gas drain can flow more reliably outward.

  The speed increasing member 6d shown in FIG. 4 (b) eliminates the frame portion having the through holes 61c and the mounting holes 63 around the lower half portion from the speed increasing member 6c in FIG. 4 (a), and the upper half chord portion 614. It is composed only of a closed portion having a half-moon shape. Also with the speed increasing member 6d, the exhaust gas passage cross-sectional area can be narrowed and narrowed, so that the exhaust gas can be blown out to the external space in a speed-up state. In this speed increasing member 6d, an inclined edge portion 64 may be formed such that its lower edge portion is bent outward and extends obliquely downward. Thereby, the flow of exhaust gas to be accelerated can be positively guided.

  The speed increasing member 6e shown in FIGS. 5 (a) and 5 (b) has two half-moon shaped through holes 61e and 61e on the upper and lower sides, and a band-shaped blocking portion 65 is formed between the both 61e and 61e. .

  In any of the cases shown in FIG. 3 to FIG. 5, the opening cross-sectional area of the through holes 61a to 61c or the pair of through holes 61e and 61e, or the opening cross-sectional area remaining after being closed by the speed increasing member 6d is shown in FIG. The size is reduced in the same manner as in the case shown, for example, the same as in the case where a circular hole having an inner diameter of 100 mm is reduced to a circular hole having an inner diameter of 80 mm, and an increase in speed similar to that shown in FIG. 2 is achieved.

Second Embodiment
FIG. 6 shows a supply / exhaust structure according to a second embodiment of the present invention. The air supply / exhaust structure of the second embodiment is based on the individual air supply / exhaust structure shown in FIG. 11 and is configured to increase the exhaust gas instead of the speed increasing member 6 added in the first embodiment. Top 8 is adopted. In the second embodiment, the same components as those of the first embodiment are denoted by the same reference numerals as those of the first embodiment, and detailed description thereof is omitted.

  The exhaust top 8 of this embodiment basically has the same configuration as the exhaust top 4 described in the first embodiment, and includes a front wall 81, a cylindrical wall 82, and an attachment piece 83. Are opened, and each exhaust port 84 is provided with a louver 85 similar to that of the first embodiment, and is configured in a gusset shape. Further, a drain hole 86 for guiding the exhaust gas drain to the external drain receiver 7 is also formed in the lowermost position of the front wall 81 in the same manner as in the first embodiment. The exhaust top 8 has a strip-shaped portion 87 having a predetermined vertical width at an intermediate position between the exhaust top 8 and an exhaust gas corresponding to the closed wall portion 87 compared to the exhaust top 4 of the first embodiment. The opening cross-sectional area through which is passed is narrowed and squeezed. What is necessary is just to set the grade which restrict | squeezes this opening cross-sectional area to the same grade as the speed-up member 6 grade | etc., Of 1st Embodiment.

  In the second embodiment, the total opening cross-sectional area of the exhaust ports 84, 84,... Through which the exhaust gas passes is narrowed and throttled by the blocking wall portion 87 of the exhaust top 8, so that the exhaust gas is accelerated accordingly. Then, the air is blown out to the external space in a speed-up state. For this reason, even if a cross wind blows as in the case of the first embodiment, the occurrence of a short cycle of exhaust gas can be suppressed / prevented. In addition, since the blocking wall portion 87 is formed in the portion of the maximum width of the exhaust top 8 with respect to the cross wind direction, the exhaust gas emitted from the exhaust port 84 is blown by a relatively strong cross wind that causes a short cycle. Even if it flows to the air supply top 104 (see FIG. 11) as shown by the dashed-dotted arrow in FIG. 6 (b), the front surface of the blocking wall portion 87 as shown by the two-dot chain line in FIG. 6 (b). The cross wind (fresh air, not exhaust gas) flowing along the air flows into the air supply top 104 and is sucked in as air supply. For this reason, even if a strong wind is blown sideways and some short cycles occur, the exhaust gas components contained in the supply air are greatly reduced to reduce the occurrence of harmful effects (combustion failure, etc.) associated with the short cycle occurrence. be able to.

  Other aspects of this embodiment are shown below. In addition, the same code | symbol as what was demonstrated above is attached | subjected to the thing similar to the above. The exhaust top 8a shown in FIG. 7 is obtained by forming a blocking wall portion 87a at the lower half side position with respect to the front wall 81a. And the drain hole 86a is formed in the same position as the drain hole 86 of FIG. Also in this case, the exhaust gas can be accelerated by the formation of the blocking wall portion 87a, and the occurrence of a short cycle can be suppressed / prevented.

  The exhaust top 8b shown in FIG. 8 is configured such that the inner bottom portion can function as the drain receiver 88 and the drain receiver 7 (see FIG. 6 and the like) can be omitted. That is, in the inner bottom portion of the exhaust top 8b, the accumulation portion is defined by the cylindrical wall 82, the blocking wall portion 87b formed on the lower half side of the front wall 81b, and the step portion 31 on the joint portion side with the exhaust tube 3. This is formed as an internal drain receiver 88. An overflow hole 89 is formed through the blocking wall portion 87b at the same level as the top position of the stepped portion 31 so that the exhaust gas drain overflowing from the drain receiver 88 overflows to the outside without flowing to the exhaust tube 3 side. I am doing so.

  The exhaust top 8c shown in FIG. 9 has a drain receiver 88c formed in the same manner as in FIG. 8, but is configured to store a larger volume of exhaust gas drain than in the case of FIG. is there. That is, the exhaust top 8c in the case of FIG. 9 is not arranged coaxially with the exhaust cylinder 3 as in the case of FIG. 8 or the like, but at a position where the exhaust top 8c is eccentric to the lower position with respect to the exhaust cylinder 3. Arrangement, that is, offset by a predetermined amount below, makes the depth of the step portion 31c larger than in the case of FIG. 8 so that the capacity that can be stored in the drain receiver 88c formed in the inner bottom portion is increased. ing. Accordingly, the formation position of the overflow hole 89c in this case is also changed to the upper position so as to be at the same level as the top position of the deeper stepped portion 31c. In the case of FIG. 9, the attachment pieces 83c of the exhaust top 8c are changed to be longer on the upper side and shorter on the lower side so as to have the same attachment manner as in the other examples.

<Third Embodiment>
FIG. 10 shows an air supply / exhaust structure according to a third embodiment of the present invention. In the air supply / exhaust structure of the third embodiment, the speed increasing member 6 added in the first embodiment is applied to the air supply / exhaust integrated type. In addition, in this 3rd Embodiment, about the thing of a structure similar to the thing of 1st Embodiment, the same code | symbol as 1st Embodiment is attached | subjected and the detailed description is abbreviate | omitted.

  In the air supply / exhaust structure of the present embodiment, a supply cylinder 9 having a predetermined diameter larger than that of the exhaust cylinder 3 is extrapolated on the outer peripheral side of the exhaust cylinder 3 to form a double cylinder system, and the outer peripheral surface of the exhaust cylinder 3 and the supply cylinder An annular space between the inner peripheral surface 9 and the air supply passage 91 for intake air supply to the combustion device D is defined. The supply cylinder 9 is brought into close contact with the outer wall 2 by a front end flange 92, and the exhaust cylinder 3 is held in a state of projecting forward (outward) by a predetermined dimension from the supply cylinder 9, and described at the front end in the first embodiment. The speed increasing member 6, the exhaust top 4, and the drain receiver 7 are combined.

  The exhaust top 4 is also fixed with a donut-shaped annular barrier wall member 10 projecting to the outer peripheral side, and is located behind the barrier wall member 10 and between the barrier wall member 10 and the tip opening of the supply cylinder 9. Are separated by a predetermined amount, and an air supply port 93 for intake of air is opened during this time.

  In the case of this embodiment, the exhaust gas is accelerated by the speed increasing member 6 and blown out from the exhaust ports 44, 44,... As described in the first embodiment. It is suppressed / prevented from losing to (the wind blowing from right to left in FIG. 10) and flowing into the air supply port 93 side. As a result, even in the case of the supply / exhaust integrated type, occurrence of a short cycle of exhaust gas can be suppressed / prevented.

  As another aspect of the present embodiment, the speed increasing member 6a shown in FIG. 3A, the speed increasing member 6b shown in FIG. 3B, and FIG. The speed increasing member 6c, the speed increasing member 6d shown in FIG. 4B, or the speed increasing member 6e shown in FIGS. 5A and 5B may be applied. Further, instead of the exhaust gas acceleration by the acceleration member 6 described above, the exhaust gas acceleration according to the second embodiment may be applied. That is, instead of the exhaust top 4, the exhaust top 8a shown in FIG. 7, the exhaust top 8b shown in FIG. 8, or the exhaust top 8c shown in FIG. 9 may be applied.

It is a section explanatory view showing a 1st embodiment of the present invention. It is a front view of the speed increasing member of FIG. It is a front view of the speed increasing member applied in another aspect of the first embodiment, FIG. 3A shows the first aspect, and FIG. 3B shows the second aspect. It is a front view of the speed increasing member applied in another aspect of the first embodiment as in FIG. 3, FIG. 4 (a) shows the third aspect, and FIG. 4 (b) shows the fourth aspect. . FIG. 5 shows a speed increasing member applied in another aspect of the first embodiment as in FIG. 3, FIG. 5 (a) is a front view of the speed increasing member of the fifth aspect, and FIG. It is a fragmentary sectional view in the AA line of 5 (a). FIG. 6A shows the second embodiment, FIG. 6A is a view corresponding to FIG. 1 of the second embodiment, and FIG. 6B is a view taken along line B-B in FIG. 7A shows another aspect of the second embodiment, FIG. 7A is a view corresponding to FIG. 1 of the first aspect, and FIG. 7B is a view taken along the line CC in FIG. 7A. . It is a FIG. 1 corresponding view which shows the 2nd other aspect of 2nd Embodiment. It is a FIG. 1 corresponding view which shows the 3rd other aspect of 2nd Embodiment. It is a section explanatory view showing a 3rd embodiment. It is explanatory drawing shown in the perspective state which fractured | ruptured the example of the individual type | system | group supply / exhaust structure partially. FIG. 12 is a cross-sectional explanatory view showing a structural example of the exhaust top of FIG. 11.

Explanation of symbols

2 Building outer wall 3 Exhaust cylinder 4 Exhaust top 6, 6a, 6b, 6c, 6d, 6e Speed increasing member (speed increasing means)
7. Drain receiver (drain receiver below the exhaust top)
8, 8a, 8b, 8c Exhaust top 9 Supply cylinder 21 Mounting hole 61, 61a, 61b, 61c, 61d, 61e Through hole 62, 64 Through hole (opening that allows passage of exhaust gas drain)
87, 87a, 87b, 87c Blocking wall (speed increasing means)
88,88c Drain receptacle (drain receptacle on the inner bottom of the exhaust top)
611 Bottom edge of through hole (opening that allows passage of exhaust gas drain)
612,615 Concavity (opening that allows passage of exhaust gas drain)
D Combustion equipment

Claims (7)

A supply / exhaust structure comprising an exhaust pipe for deriving exhaust gas from a combustion device, a supply cylinder for introducing outside air into the combustion device, and an exhaust top coupled to the tip of the exhaust pipe,
An air supply / exhaust structure characterized in that a speed increasing means for increasing the flow speed of the exhaust gas by forcibly narrowing an opening through which the exhaust gas passes is provided to the exhaust top. The air supply / exhaust structure according to claim 1,
The speed increasing means is arranged so as to partition a part of a passage through which exhaust gas passes at a position behind the exhaust port of the exhaust top so that an opening through which exhaust gas passes is narrower than a passage cross-sectional area of the exhaust pipe. A supply / exhaust structure composed of a speed increasing member. The air supply / exhaust structure according to claim 1,
The speed increasing means is constituted by a speed increasing member interposed in a passage through which exhaust gas passes at the back position of the exhaust port of the exhaust top,
The speed increasing member is provided with an air supply / exhaust structure provided with a through hole formed to be narrower than a passage cross-sectional area of the exhaust pipe as an opening through which exhaust gas passes. The air supply / exhaust structure according to claim 3,
The speed increasing member has an air supply / exhaust structure having an opening that allows passage of the exhaust gas drain at a position corresponding to a lowermost position of the exhaust pipe. The air supply / exhaust structure according to claim 1,
The speed increasing means is an air supply / exhaust structure constituted by a blocking wall portion formed so that an opening cross-sectional area of an exhaust port is narrower than a passage cross-sectional area of the exhaust pipe in a front wall constituting an exhaust top. It is an air supply / exhaust structure in any one of Claims 1-5,
An air supply / exhaust structure comprising a drain receiver for temporarily storing an exhaust gas drain below the exhaust top. The air supply / exhaust structure according to claim 5,
An air supply / exhaust structure in which the drain wall for temporarily storing the exhaust gas drain is partitioned in the inner bottom portion of the exhaust top by forming the closed wall portion on the lower half of the front wall.

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