JP5306290B2 - Combustion device - Google Patents

Description

  The present invention is a combustion comprising a heat exchanger such as a bath that reheats relatively warm water returning from a bathtub, a floor heating mat, etc., and then returns to the bathtub or floor heating mat, and a heat exchanger for hot water supply. Relates to the device.

  As this type of combustion apparatus, the one described in Patent Document 1 is known. As shown in FIG. 11, this combustion apparatus divides the inside of the can body 104 in parallel in the horizontal direction by a partition wall 191, and a hot water supply side heating passage 151 in which a hot water supply gas burner 121 is disposed and the hot water supply side heating passage 151. A hot water supply side passage 105 including a hot water supply side exhaust passage 152 that is continuous downstream, a retreat side heating passage 161 in which a retreat gas burner 131 is disposed, and a replenishment step that is continuous downstream of the retreat side heating passage 161. A tracking-side passage 106 composed of the heel-side exhaust passage 162 is formed.

  A hot water supply sensible heat exchanger 122 is disposed in the hot water supply side heating passage 151, a sensible heat sensible heat exchanger 132 is disposed in the reheating side heating passage 161, and the hot water supply side A latent heat exchanger 123 is provided in the exhaust passage 152, and combustion air is supplied to the hot water supply gas burner 121 and the remedy gas burner 131 by driving a single fan 143, and then the hot water supply side heating passage 151. The combustion exhaust gas from the hot water supply gas burner 121 flows from the hot water supply side exhaust passage 152 to the hot water supply side exhaust passage 152, and the combustion exhaust gas from the tracking gas burner 131 flows from the tracking side heating passage 161 to the tracking side exhaust passage 162. . The combustion exhaust gas that has reached the hot water supply side exhaust passage 152 and the tracking side exhaust passage 162 is discharged to the outside from an exhaust port formed in the front surface of the can body 104.

  According to this combustion apparatus, the combustion exhaust can be passed through the hot water supply side passage 105 and the retreat side passage 106 by using a common fan 143 and discharged from the exhaust port. There is no need to dispose a combustion fan in each of the eaves passages 106, and there is an advantage that the number of parts can be reduced. Moreover, since the sensible heat exchanger 122 for hot water supply and the sensible heat exchanger 132 for replenishment are accommodated in the single can body 4, the can body 104 can be shared and the number of parts can be reduced.

  Further, in the combustion apparatus, a latent heat exchanger 123 is disposed in the hot water supply side exhaust passage 152 in order to increase the thermal efficiency of the entire apparatus. On the other hand, if a latent heat exchanger is provided in the exhaust side exhaust passage 162, the number of parts increases and the structure becomes complicated. From the above, the latent heat exchanger may not be provided in the tracking side exhaust passage 162.

  However, if the latent heat exchanger 123 is provided only in the hot water supply side exhaust passage 152, the exhaust resistance of the hot water supply side passage 105 becomes larger than that of the tracking side passage 106, and the exhaust resistance between the hot water supply side passage 105 and the tracking side passage 106. This causes a problem that the proper combustion of the hot water supply gas burner 121 and the memorial gas burner 131 is hindered.

  Therefore, in order to balance the exhaust resistance between the hot water supply side passage 105 and the retreat side passage 106, the conventional combustion apparatus has a hot water supply in the middle of the retreat side exhaust passage 162 as shown in FIGS. 11 and 12. A throttle portion 192 is formed in which the exhaust resistance of the combustion exhaust flowing through the side exhaust passage 152 and the exhaust resistance of the combustion exhaust flowing through the tracking side exhaust passage 162 are relatively the same.

  The throttle section 192 is first partitioned by an upper and lower partition plate 193 so as to divide the can 104 into upper and lower portions, and a hot water supply side heating passage 151 formed below the upper and lower partition plates 193 at the rear of the upper and lower partition plates 193 and above A hot water supply side opening (not shown) communicating with the hot water supply side exhaust passage 152 formed on the upper side, a retreat side heating passage 161 formed below the upper and lower partition plates 193, and a retreat side exhaust formed above. It is formed by forming a tracking side opening 194 that communicates with the passage 162 and fixing a plate-like exhaust resistor 195 in the middle of the tracking side exhaust passage 162 so that a gap is formed below. The Specifically, the exhaust resistor 195 has a plane perpendicular to the exhaust flow direction, and a predetermined gap is formed between the lower side of the exhaust resistor 195 and the upper and lower partition plates 193. The narrow side exhaust passage 162 is fixed to the ceiling and the side surface, and a slit-shaped throttle 192 is formed in the middle of the tracking side exhaust passage 162 due to this gap.

JP 2008-32276 A

  However, if the exhaust resistance body 195 is provided in the middle of the flow direction of the tracking side exhaust passage 162, the exhaust resistance body 195 is fixed to the wall surface of the tracking side exhaust path 162 with screws or the like, so that the assembling property is poor. Furthermore, when the assembled state varies, the exhaust resistance varies.

Therefore, it is conceivable to balance the exhaust resistance without providing the exhaust resistor 195 by adjusting the opening area of the tracking side opening 194 formed in the upper and lower partition plates 193. However, in order to make the exhaust resistance of the exhaust side exhaust passage 162 the same as the exhaust resistance of the hot water supply side exhaust passage 152 in which the latent heat exchanger 123 having a large resistance is arranged, the additional side opening 194 has a large size. It is necessary to reduce the size considerably. Thus, when the opening area of the tracking side opening 194 is considerably reduced, the combustion exhaust gas flowing from the tracking side opening 194 into the tracking side exhaust passage 162 has a high flow velocity and has a large cavity portion. After combustion exhaust collides with the ceiling portion of the exhaust passage 162, it flows to the exhaust port formed in the front surface of the can body 104, so that the turbulent flow of combustion exhaust occurs in the tracking side exhaust passage 162, and noise increases. There is.
In addition, when a sensible heat exchanger for heating that reheats a relatively warm return water as in the case of reheating a bath is incorporated in place of the sensible heat exchanger for remedy, there is a problem similar to the above. .

  The present invention has been made in view of the above circumstances, and even if the first exhaust passage which is a hot water supply side exhaust passage is provided with a latent heat exchanger and the latent heat exchanger is not provided in the second exhaust passage, An object of the present invention is to provide a combustion apparatus that can balance the exhaust resistance of the passage and the second exhaust passage and can reduce noise.

In the present invention, the first gas burner and the second gas burner different from the first gas burner are respectively disposed in two first passages and second passages formed in parallel in the horizontal direction in one can body,
The first passage extends from the first gas passage and the downstream end of the first heating passage in which the first sensible heat exchanger for recovering the sensible heat of the combustion exhaust from the first gas burner is disposed. 1 exhaust passage,
The second passage extends from a downstream end of the second heating passage and the second heating passage in which the second sensible heat exchanger for recovering the sensible heat of the combustion exhaust from the second gas burner and the second gas burner is disposed. 2 exhaust passages,
An exhaust port through which combustion exhaust gas that has passed through the first exhaust passage and the second exhaust passage is discharged is formed on the front surface of the can body,
The first exhaust passage is provided with a latent heat exchanger that recovers the latent heat of the combustion exhaust,
In a combustion apparatus that supplies combustion air to a first gas burner and a second gas burner by a single fan,
A partition that divides the can body vertically is provided so that a predetermined gap is formed between the rear end of the can body and the rear wall surface of the can body, and a first heating passage and a second heating passage are formed below the partition wall. The first exhaust passage and the second exhaust passage are formed in the upper part, the first communication passage communicating the first heating passage and the first exhaust passage to the rear portion of the can body, and the second heating passage and the second exhaust passage. Forming a second communication passage communicating with the passage;
A resistance partition plate for partitioning the second exhaust passage and the second communication passage at the rear end of the partition wall so that the front surface of the can body and the plane face each other;
Combustion in which the resistance divider plate has an exhaust resistance opening having a size in which the exhaust resistance of the combustion exhaust gas flowing through the first passage and the exhaust resistance of the combustion exhaust gas flowing through the second passage are relatively the same. Device.

  In the combustion apparatus of the present invention, the first sensible heat exchanger is a sensible heat exchanger for hot water supply, and the second sensible heat exchanger is a sensible heat exchanger for bathing or heating. It can be configured as a sensible heat exchanger.

The combustion apparatus includes a first communication passage that connects the first heating passage and the first exhaust passage to a rear portion of the can body by a partition wall, and a second communication passage that connects the second heating passage and the second exhaust passage. A resistance partition plate formed with an exhaust resistance opening to balance the exhaust resistance of the first passage and the second passage is formed at the rear end of the partition so as to partition the second heating passage and the second communication passage. ing.
According to the combustion apparatus of the present invention, the combustion exhaust gas flowing from the second heating passage through the second communication passage to the second exhaust passage receives resistance by passing through the exhaust resistance opening, and the exhaust resistance opening. The combustion exhaust gas flowing out from the section flows in a straight line toward the exhaust port formed on the front surface of the can body and becomes a laminar flow, so that the noise can be minimized.
Thus, according to the combustion apparatus of the present invention, the first passage and the second passage can be provided even if the latent heat exchanger is provided in the first exhaust passage and the latent heat exchanger is not provided in the second exhaust passage. The exhaust resistance can be balanced, and the turbulent flow is less likely to occur in the second exhaust passage, and the noise can be reduced.

Furthermore, in the combustion apparatus of the present invention, the exhaust resistance opening formed in the resistance partition plate includes a cylindrical guide portion that surrounds the periphery of the hole and protrudes toward the downstream side in the flow direction of the combustion exhaust gas. It is preferable.
Since the exhaust resistance opening has the cylindrical guide portion, the combustion exhaust flowing into the second exhaust passage from the exhaust resistance opening is likely to generate a linear flow, and noise can be further reduced. Moreover, since the combustion exhaust also receives the frictional resistance of the inner surface of the cylindrical guide portion, the opening area on the inflow side of the exhaust resistance opening can be increased compared to the case where the guide portion is not formed. The combustion exhaust gas easily flows into the opening, and the noise generated in the second communication path can be reduced as much as possible.

  Furthermore, it is preferable that the guide portion of the exhaust resistance opening is formed in a tapered shape. By forming the guide portion in a tapered shape, the flow rate of the combustion exhaust gas flowing into the second exhaust passage from the exhaust resistance opening becomes faster and the flow becomes a laminar flow, so that the combustion exhaust gas flows smoothly. Further, since the opening area on the inflow side of the exhaust resistance opening is large, it becomes easier for the combustion exhaust to flow from the second communication path to the exhaust resistance opening, and noise generated in the second communication path and the second exhaust path is further reduced. it can.

In the combustion apparatus of the present invention, it is preferable that the second exhaust passage has a plate-like passage volume adjusting member that narrows the passage sectional area of the second exhaust passage.
According to the combustion apparatus of the present invention, the passage cross-sectional area of the second exhaust passage can be reduced by the passage volume adjusting member, so that the combustion exhaust flowing into the second exhaust passage from the exhaust resistance opening is less likely to be turbulent, and the passage volume Noise can be reduced because it can flow linearly along the adjusting member to the exhaust port.

As described above, according to the combustion apparatus of the present invention, the combustion exhaust gas flowing from the second heating passage to the second exhaust passage through the second communication passage receives resistance by passing through the exhaust resistance opening. The combustion exhaust gas flowing out from the exhaust resistance opening flows almost linearly toward the exhaust port formed on the front surface of the can body and becomes a laminar flow, so that the noise can be minimized.
Thus, according to the combustion apparatus of the present invention, the first passage and the second passage can be provided even if the latent heat exchanger is provided in the first exhaust passage and the latent heat exchanger is not provided in the second exhaust passage. The exhaust resistance can be balanced, and the turbulent flow is less likely to occur in the second exhaust passage, and the noise can be reduced.

It is sectional drawing of the combustion apparatus which concerns on Embodiment 1 of this invention. It is II sectional drawing of FIG. It is II-II sectional drawing of FIG. It is III-III sectional drawing of FIG. It is structure explanatory drawing of the tracking side exhaust passage vicinity. It is a front view of the exhaust-resistance opening part used for the combustion apparatus which concerns on Embodiment 1 of this invention. It is sectional drawing of the exhaust-resistance opening part used for the combustion apparatus which concerns on Embodiment 1 of this invention. It is a perspective view of the exhaust-resistance opening part used for the combustion apparatus which concerns on Embodiment 1 of this invention. 1 is an overall configuration diagram of a combustion apparatus according to Embodiment 1 of the present invention. It is sectional drawing of the tracking side exhaust passage of the combustion apparatus which concerns on Embodiment 2 of this invention. It is sectional drawing of the combustion apparatus of a prior art example. It is structure explanatory drawing of the tracking side exhaust passage vicinity of the combustion apparatus of a prior art example.

[Embodiment 1]
Hereinafter, a combustion apparatus according to Embodiment 1 of the present invention will be described with reference to the drawings.
As shown in FIG.1 and FIG.9, the combustion apparatus 1 which concerns on this Embodiment 1 has the hot water supply gas burner 21 which is a 1st gas burner, the hot water supply sensible heat exchanger 22 used as a 1st sensible heat exchanger, and latent heat. A hot water supply means 2 provided with a heat exchanger 23 and a combined heat supply means 3 provided with a sensible heat exchanger 32 for remedy and a gas burner 31 for remedy which is a second gas burner and a sensible heat exchanger 32 for second sensible heat exchanger. It is a heat source machine.

The combustion apparatus 1 includes a rectangular can body 4, and a hot water supply side passage 5 (first passage) in which a hot water supply gas burner 21 is disposed and a memorial gas burner 31 are disposed in the can body 4. There is provided a partition body 41 in which the chasing side passage 6 (second passage) is partitioned in parallel in the horizontal direction.
An air supply opening 42 is opened at the bottom of the can 4, and a fan 43 is connected to the air supply opening 42. Between the hot water supply gas burner 21 and the reheating gas burner 31 disposed below the can 4 and the air supply port 42, the combustion air supplied from the fan 43 is supplied to the hot water supply gas burner 21 and the renewal gas burner. A distribution plate 44 in which a group of through-holes for supplying uniformly to 31 is formed is disposed horizontally.

  The hot water supply side passage 5 includes a hot water supply side heating passage 51 serving as a first heating passage in which a hot water supply gas burner 21 and a hot water supply sensible heat exchanger 22 for recovering sensible heat of combustion exhaust from the hot water supply gas burner 21 are disposed. The hot water supply side exhaust passage 52 is a first exhaust passage extending from the downstream end of the hot water supply side heating passage 51. The hot water supply side exhaust passage 52 is provided with a latent heat exchanger 23 that recovers the latent heat of the combustion exhaust. A hot water supply gas burner 21, a hot water supply sensible heat exchanger 22, and a latent heat exchanger 23 are arranged and accommodated in the hot water supply side passage 5 in this order from below.

  The remedy side passage 6 is a remedy that becomes a second heating passage in which a remedy gas burner 31 and a sensible heat exchanger 32 for remedy that recovers sensible heat of combustion exhaust from the remedy gas burner 31 are disposed. A side heating passage 61 and a tracking side exhaust passage 62 serving as a second exhaust passage extending from the downstream end of the tracking side heating passage 61 are configured. A chasing gas burner 31 and a chasing sensible heat exchanger 32 are arranged and accommodated in the chasing side passage 6 in order from the bottom.

  As shown in FIGS. 3 and 4, an exhaust port 45 through which combustion exhaust gas that has passed through the hot water supply side exhaust passage 52 and the tracking side exhaust passage 62 is discharged is formed in the upper front portion of the can body 4. Note that the exhaust side exhaust passage 62 and the hot water supply side exhaust passage 52 are joined downstream and connected to the exhaust port 45.

  As shown in FIG. 9, fuel gas is supplied to the hot water supply gas burner 21 and the memorial gas burner 31 via a fuel gas supply pipe 71, and the fuel gas supply pipe 71 is branched into two to provide a hot water supply gas burner. 21 and the gas burner 31 for remembrance. The fuel gas supply pipe 71 is provided with an original gas solenoid valve 72 and a gas proportional valve 73 for adjusting the amount of gas in the pipe before branching, and a hot water supply side solenoid valve 74 and a remedy side in each of the branched pipes. An electromagnetic valve 75 is provided.

  The original gas solenoid valve 72 switches between supplying and shutting off the fuel gas to the hot water supply gas burner 21 and the remedy gas burner 31. The gas proportional valve 73 adjusts the amount of fuel gas supplied to the hot water supply gas burner 21 and the remedy gas burner 31. The hot water supply side solenoid valve 74 and the tracking side solenoid valve 75 individually supply and shut off the fuel gas to the hot water supply gas burner 21 and the tracking gas burner 31. In the first embodiment, since the hot water supply gas burner 21 requires a larger capacity than the remedy gas burner 31, the hot water supply gas burner 21 is configured with a unit burner number larger than the unit burner number of the remedy gas burner 31. ing.

  The hot water supply means 2 is connected to a water pipe (not shown), and the hot water heated by the water supply pipe 24 for supplying water to the latent heat exchanger 23 and the hot water sensible heat exchanger 22 and the hot water sensible heat exchanger 22 is discharged. And a hot water supply pipe 26 and a hot water filling pipe 27 formed by branching the downstream end of the hot water supply pipe 25. The hot water supply pipe 26 communicates with the curan in the kitchen or the washroom, and the hot water filling pipe 27 communicates with the bathtub 11.

  The hot water pipe 27 is provided with a hot water solenoid valve 27a for opening and closing the circulation of the hot water pipe 27 and a check valve 27b for allowing only the flow from the hot water pipe 25 to the bathtub 11 through the hot water pipe 27. It has been.

  As shown in FIG. 1, the sensible heat exchanger 22 for hot water supply includes a number of hot water supply side heat sink fins 22a arranged in parallel with a gap in the front-rear direction, and a meander that passes through the hot water supply side heat sink fins 22a group. And a hot water supply side heat absorption pipe 22b. The hot water supply side heat absorption pipe 22 b is connected to the hot water discharge pipe 25. Both ends of the hot water supply side heat sink fin 22a are bent at right angles, and the bent portion is brought into contact with the adjacent hot water supply side heat sink fin 22a. With such a configuration, the combustion exhaust gas of the hot water supply gas burner 21 flows only upward in the hot water supply side heat sink fins 22a. The upstream end of the hot water supply side heat absorption pipe 22 b is connected to the latent heat exchanger 23.

  In the hot water supply means 2, a path connected to the water supply pipe 24 → the latent heat exchanger 23 → the sensible heat exchanger 22 for hot water supply → the hot water pipe 25 → the hot water supply pipe 26 or the hot water filling pipe 27 is formed. For example, when hot water is supplied in the kitchen, the hot-water tap connected to the hot water supply pipe 26 is opened so that the hot water gas burner 21 burns, and the water supplied from the water pipe to the water supply pipe 24 is subjected to latent heat exchange. After being heated in the hot water supply 23, the hot water is heated in the sensible heat exchanger 22 for hot water supply to become hot water, and hot water is supplied to the hot water supply pipe 26 or the hot water filling pipe 27 via the hot water discharge pipe 25.

  The memorial means 3 includes a memorial circuit 33 connected to the bathtub 11, and sensible heat exchanger 32 for memorial heat and hot water in the bathtub 11 are circulated in the middle of the memorial circuit 33. A circulation pump 34 is provided. The remedy means 3 operates the fan 43 to burn the remedy gas burner 31 and operates the circulation pump 34 to circulate hot water in the bathtub 11 through the remedy circulation path 33 for remedy. The bath is heated by the sensible heat exchanger 32 to replenish the bath.

  Similarly to the sensible heat exchanger 22 for hot water supply, the sensible heat exchanger 32 for remedy includes a large number of remedy side heat sink fins 32a arranged side by side with a gap in the front-rear direction, and these remedy side heat sinks. It is composed of a meandering tracking-side endothermic tube 32b penetrating through the fin 32a group. The tracking-side heat absorbing fins 32a are bent at both ends in the lateral direction at right angles, and the bent portions are brought into contact with the adjacent tracking-side heat absorbing fins 32a. With such a configuration, the combustion exhaust gas of the tracking gas burner 31 flows only upward in the tracking side heat sink fins 32a.

  Then, by operating the fan 43 during combustion of the hot water supply gas burner 21 and the additional gas burner 31, the combustion exhaust gas flowing through the hot water supply side passage 5 and the additional heating side passage 6 is discharged from the exhaust port 45 to the outside.

  Moreover, as shown in FIGS. 1-5, the upper partition 46 and the lower partition 47 which partition an inside up and down are arrange | positioned at the upper part of the can body 4, As shown in FIG. Both lateral ends of the partition walls 46 and 47 are joined to the wall surfaces on both lateral sides of the can 4. As shown in FIGS. 3 and 4, the upper partition wall 46 is joined to the upper exhaust guide 48a of the pair of plate-shaped exhaust guides 48a and 48b whose front end portion is connected to the exhaust port 45, and the rear end portion is The can 4 is joined to the rear wall surface. The lower partition wall 47 has a front end joined to a lower exhaust guide 48 b connected to the exhaust port 45, and a predetermined gap is formed between the rear end and the rear wall surface of the can 4.

  The upper partition wall 46 and the lower partition wall 47 are inclined downward toward the exhaust port 45 side, and the drain generated by the latent heat exchanger 23 disposed in the hot water supply side exhaust passage 52 is transferred to the lower partition wall. 47 is led to a drain collecting groove formed at the front end portion of 47.

  The space between the upper and lower partition walls 46 and 47 and the space below the lower partition wall 47 are partitioned by a partition body 41, and the hot water supply side heating passage 51 and the tracking side heating passage 61 are arranged in parallel below the lower partition wall 47. The hot water supply side exhaust passage 52 and the tracking side exhaust passage 62 are formed in parallel above the lower partition wall 47. Further, as shown in FIGS. 3 and 4, the hot water supply side communication passage 53 that connects the hot water supply side heating passage 51 and the hot water supply side exhaust passage 52 to the rear part in the can body 4, and the remedy side heating passage 61 and the remedy. A chase-side communication passage 63 that communicates with the side exhaust passage 62 is formed. The hot water supply side communication path 53 and the memorial side communication path 63 are also partitioned by the partition body 41.

  Therefore, the hot water supply side exhaust passage 52 is formed by being surrounded by the upper partition wall 46, the lower partition wall 47, the wall surface on one side in the lateral direction of the can body 4, and the partition body 41. The partition wall 46, the lower partition wall 47, the wall surface on the other side in the lateral direction of the can 4, and the partition 41 are formed. A latent heat exchanger 23 that recovers latent heat from the combustion exhaust that has passed through the hot water sensible heat exchanger 22 is disposed above the lower partition wall 47 in the hot water supply side exhaust passage 52.

  In addition, as shown in FIGS. 1, 2, 4, and 5, at the rear end of the lower partition wall 47 that constitutes the tracking side exhaust passage 62, there is a tracking side exhaust passage 62 and a tracking side communication passage 63. The resistance partition plate 81 is partitioned so that the front surface of the can body 4 on which the exhaust port 45 is provided faces the plane. The resistance partition plate 81 is bonded and fixed to the upper partition wall 46 and the lower partition wall 47, the side surface of the can body, and the partition body 41.

  Further, the resistance partition plate 81 has an exhaust resistance opening having a size such that the exhaust resistance of the combustion exhaust flowing through the hot water supply side passage 5 and the exhaust resistance of the combustion exhaust flowing through the tracking side passage 6 are relatively the same. Department 82 is established.

  The exhaust resistance opening 82 forms a rectangular opening 81a at the approximate center of the resistance partition plate 81, and the exhaust resistance opening 82 shown in FIGS. 6 to 8 is formed in the opening 81a of the resistance partition plate 81. By fitting the resistance member 83 to be formed, it is formed at the approximate center of the resistance partition plate 81.

  The resistance member 83 has a flange portion 83b made of a rectangular plate member having a long hole 83a formed in the center thereof, and a flat surface so as to surround the periphery of the long hole 83a of the flange portion 83b. A projecting (height H) tapered cylindrical guide portion 83c is integrally formed, and an exhaust resistance opening 82 is constituted by the long hole 83a and the guide portion 83c. The opening 83d at the distal end of the guide portion 83c is also formed in a horizontally long shape (longitudinal dimension: L, width direction dimension: D) similarly to the elongated hole 83a of the collar portion 83b.

  The resistance member 83 is formed by inserting a guide portion 83c into the opening 81a of the resistance partition plate 81 from the tracking side communication passage 63 side so that the guide portion 83c protrudes toward the downstream side in the combustion exhaust flow direction. The portion 83 b is fixed to the resistance partition plate 81. In this way, the exhaust resistance opening 82 is formed in the resistance partition plate 81.

  The combustion apparatus 1 of the first embodiment allows the combustion exhaust gas flowing in the tracking side passage 6 to pass through the exhaust resistance opening portion 82 having the tapered guide portion 83 c formed in the resistance partition plate 81, thereby The exhaust resistance of the combustion exhaust gas flowing through the side passage 6 and the exhaust resistance of the combustion exhaust gas flowing through the hot water supply side passage 5 where the latent heat exchanger 23 is disposed are made to be relatively substantially the same. In this manner, the resistance partition plate 81 and the exhaust resistance opening 82 maintain the exhaust balance of the hot water supply side passage 5 and the tracking side passage 6.

  In the combustion apparatus 1 of the first embodiment, when the fan 43 is operated and the hot water supply gas burner 21 is combusted, the combustion exhaust from the hot water supply gas burner 21 is converted into the sensible heat exchanger 22 for hot water supply → the hot water supply side communication passage 53 → It flows along the route of the hot water supply side exhaust passage 52 → the exhaust port 45. The sensible heat of the combustion exhaust gas is recovered by the hot water sensible heat exchanger 22, while the combustion exhaust gas whose temperature has decreased after passing through the hot water sensible heat exchanger 22 is latent heat exchange in the hot water supply side exhaust passage 52. It is cooled by the vessel 23 and the latent heat is also recovered.

  When the fan 43 is operated and the remedy gas burner 31 is combusted, the combustion exhaust from the remedy gas burner 31 is added to the sensible heat exchanger 32 for remedy → the remedy side communication passage 63 → the resistance partition plate. It flows in the path of the exhaust resistance opening 82 of 81, the exhaust side exhaust passage 62, and the exhaust port 45. Then, the sensible heat of the combustion exhaust gas is recovered by the sensible heat exchanger for remedy 32, whereby the hot water heated by the sensible heat exchanger for remedy 32 passes through the circulatory circuit 33 for remedy. To be sought after.

  In the first embodiment, since the resistance partition plate 81 having the exhaust resistance opening 82 is provided in the tracking-side exhaust passage 62, the tracking-side heating passage 61 and the tracking-side communication passage 63 are connected to the tracking-side exhaust passage 62. The combustion exhaust flowing in the heel side exhaust passage 62 receives resistance by passing through the exhaust resistance opening 82, and the combustion exhaust flowing out from the exhaust resistance opening 82 is exhaust formed on the front surface of the can body 4. Since it flows almost linearly toward the mouth 45 and becomes a laminar flow, the noise can be minimized.

  Therefore, even if the hot water supply side exhaust passage 52 in which the latent heat exchanger 23 is arranged and the tracking side exhaust passage 62 in which the latent heat exchanger is not arranged in the can body 4, the hot water supply side passage 5 and the additional hot water supply passage 5 are arranged. While maintaining the exhaust balance of the tub side passage 6 and allowing the hot water supply gas burner 21 and the reheating gas burner 31 to burn smoothly, the noise of the entire combustion apparatus 1 can also be reduced.

  Furthermore, in the combustion apparatus 1 according to the first embodiment, the exhaust resistance opening 82 has the tapered guide portion 83c, so that the exhaust resistance can be increased as compared with the case where the guide portion 83c is not provided, Since the flow rate of the combustion exhaust gas flowing into the exhaust side exhaust passage 62 from the exhaust resistance opening 82 can be increased, a straight flow is likely to occur, and noise can be reduced satisfactorily.

  Further, since the exhaust resistance can be increased by the tapered shape of the guide portion 83c, in order to obtain an exhaust resistance value that can achieve an exhaust balance, the inflow side is larger than the opening size of the exhaust resistance opening portion 82 when the guide portion 83c is not provided. The area of the exhaust resistance opening 82 can be increased, combustion exhaust gas can easily flow from the tracking side communication path 63 to the exhaust resistance opening 82, and noise generated in the tracking side communication path 63 can be further reduced.

[Embodiment 2]
In the combustion apparatus 1 of the first embodiment, the hot water supply side exhaust passage 52 and the tracking side exhaust passage 62 are configured such that the ceiling portion and the bottom portion of each passage are formed by the same upper partition wall 46 and lower partition wall 47. However, as shown in FIG. 10, the inside of the exhaust side exhaust passage 62 is located near the exhaust resistance opening portion 82 so that the exhaust resistance opening portion 82 and the exhaust port 45 communicate with each other in the exhaust side exhaust passage 62. You may provide the plate-shaped channel | path volume adjustment member 84 divided up and down.

  By providing the passage volume adjusting member 84 in the tracking side exhaust passage 62, the volume of the tracking side exhaust passage 62 can be reduced, and the passage volume adjusting member 84 is arranged near the exhaust resistance opening 82. Therefore, the combustion exhaust gas flowing into the exhaust side exhaust passage 62 from the exhaust resistance opening 82 is unlikely to be turbulent and can flow linearly to the exhaust port 45 along the passage volume adjusting member 84. Noise is reduced.

[Other]
1. In the above embodiment, the exhaust resistance opening 82 provided in the resistance partition plate 81 is configured by the long hole 83a of the resistance member 83 and the tapered cylindrical guide portion 83c protruding from the periphery of the long hole 83a. Alternatively, a long hole may be simply opened in the resistance partition plate 81 to form the exhaust resistance opening 82. In addition, the guide portion may be configured by forming the tip opening into a cylindrical shape having the same size as the inflow side long hole 83a of the resistance member 83, instead of tapering the cylindrical guide portion 83c. Furthermore, a rectangular long hole may be formed in the resistance partition plate 81, and a guide member may be formed by projecting a plate member on a pair of long sides opposed to the long hole.

  The guide portion has an exhaust resistance opening whether the tip opening is formed in a cylindrical shape having the same size as the inflow side long hole, or in the case where a plate-like member is formed on a pair of long sides opposed to the long hole. Since the combustion exhaust gas flowing into the exhaust side exhaust passage from the portion is guided by the guide portion and a straight flow is likely to occur, noise can be reduced satisfactorily.

  Also, when the guide part is formed in a non-tapered cylindrical shape, the combustion exhaust also receives the frictional resistance of the inner surface of the cylindrical part of the guide part. Thus, the opening area on the inflow side of the exhaust resistance opening can be increased. Therefore, also in this case, the combustion exhaust gas easily flows from the tracking side communication path into the exhaust resistance opening, and noise generated in the tracking side communication path can be reduced as much as possible.

  2. In the combustion apparatus of the present invention, a sensible heat exchanger for heating that reheats return hot water from a heating terminal such as a floor heating mat may be incorporated in place of the sensible heat exchanger 32 for remedy described above.

  3. The combustion apparatus according to the above embodiment can also be used when chasing a bath using a liquid-liquid heat exchanger that heats the water in the secondary circuit with the hot water in the primary circuit. In this case, the secondary circuit of the liquid-liquid heat exchanger is used as a circulation circulation circuit for the bath, while the heat exchanger that heats the return hot water in the primary circuit of the liquid-liquid heat exchanger is added as described above. It replaces with the sensible heat exchanger 32 for soot, and is integrated.

[Example]
Combustion device (Experimental Examples 1 to 6) provided with a resistance partition plate having an exhaust resistance opening according to the present invention, and a combustion device (Experimental Example 7) provided with a conventional exhaust resistor 95 shown in FIGS. ) The noise level was compared.

Experimental Examples 1 to 6 are combustion apparatuses provided with a resistance partition plate having six types of exhaust resistance openings shown in Table 1 below as exhaust resistance openings of the combustion apparatus according to the present invention. Further, Experimental Examples 1 to 5 are resistance dividers in which an exhaust resistance opening portion having a guide portion (longitudinal dimension of tip opening: L, width dimension of tip opening: D, height: H) is formed. In Example 6 of the experiment, the guide part was not provided, and the resistance partition plate was simply provided with an exhaust resistance opening. In Table 1, the opening at the front end is an opening on the outflow side of the combustion exhaust in the exhaust resistance opening, and the exhaust resistance opening is formed by forming the outflow side opening into a long hole. The size of the conventional throttle portion and the size of the exhaust resistance opening were set so that the exhaust resistance was the same for all combustion devices, and the fan rotation speed was also constant (285 Hz). In this measurement, the area of the opening of the exhaust resistance opening of Experimental Examples 1 to 5, the area of the opening opened in the resistance partition plate of Experimental Example 6, and the middle of the exhaust side exhaust passage of Experimental Example 7 are provided. The area of the gap formed by the exhaust resistor was set to 560 mm ² .

  As shown in Table 1, compared to the case where a conventional exhaust resistor is provided (Experimental Example 7), the case where an opening is simply opened in the resistance partition without forming the guide portion (Experimental Example 6). The noise was small. Furthermore, when the guide part (Experimental Examples 1 to 5) was provided, the noise was further reduced as compared with the case where the guide part was not provided (Experimental Example 6).

1 Combustion device 4 Can body 5 Hot water supply side passage (first passage)
6 Memorial side passage (second passage)
21 Gas burner for hot water supply (1st gas burner)
22 Sensible heat exchanger for hot water supply (first sensible heat exchanger)
23 Latent heat exchanger 31 Gas burner for remembrance (second gas burner)
32 Sensible heat exchanger for remembrance (second sensible heat exchanger)
41 Partition body 43 Fan 45 Exhaust port 47 Lower partition wall 51 Hot water supply side heating passage (first heating passage)
52 Hot water supply side exhaust passage (first exhaust passage)
53 Hot water supply side communication path (first communication path)
61 Remembrance side heating passage (second heating passage)
62 Retreat side exhaust passage (second exhaust passage)
63 Memorial side communication path (second communication path)
81 Resistance partition plate 82 Exhaust resistance opening 83 Resistance member 83a Long hole 83b Brim portion 83c Guide portion 83d Tip opening 84 Passage volume adjusting member

Claims (4)

A first gas burner and a second gas burner different from the first gas burner are respectively disposed in two first passages and second passages that are partitioned in parallel in the horizontal direction in one can body,
The first passage extends from the first gas passage and the downstream end of the first heating passage in which the first sensible heat exchanger for recovering the sensible heat of the combustion exhaust from the first gas burner is disposed. 1 exhaust passage,
The second passage extends from a downstream end of the second heating passage and the second heating passage in which the second sensible heat exchanger for recovering the sensible heat of the combustion exhaust from the second gas burner and the second gas burner is disposed. 2 exhaust passages,
An exhaust port through which combustion exhaust gas that has passed through the first exhaust passage and the second exhaust passage is discharged is formed on the front surface of the can body,
The first exhaust passage is provided with a latent heat exchanger that recovers the latent heat of the combustion exhaust,
In a combustion apparatus that supplies combustion air to a first gas burner and a second gas burner by a single fan,
A partition that divides the can body vertically is provided so that a predetermined gap is formed between the rear end of the can body and the rear wall surface of the can body, and a first heating passage and a second heating passage are formed below the partition wall. The first exhaust passage and the second exhaust passage are formed in the upper part, the first communication passage communicating the first heating passage and the first exhaust passage to the rear portion of the can body, and the second heating passage and the second exhaust passage. Forming a second communication passage communicating with the passage;
A resistance partition plate for partitioning the second exhaust passage and the second communication passage at the rear end of the partition wall so that the front surface of the can body and the plane face each other;
Combustion in which a resistance partition plate has an exhaust resistance opening having a size in which the exhaust resistance of the combustion exhaust gas flowing through the first passage and the exhaust resistance of the combustion exhaust gas flowing through the second passage are relatively the same. apparatus. The combustion apparatus according to claim 1, wherein
An exhaust resistance opening formed in the resistance partition plate is a combustion apparatus provided with a cylindrical guide portion that surrounds the periphery of the hole and protrudes toward the downstream side in the flow direction of the combustion exhaust.   The combustion apparatus according to claim 2, wherein the guide part of the exhaust resistance opening is formed in a tapered shape. The combustion apparatus according to any one of claims 1 to 3,
The second exhaust passage is a combustion apparatus having a plate-like passage volume adjusting member that narrows the cross-sectional area of the second exhaust passage.

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