JP5813065B2 - Side exhaust type water heater - Google Patents

Description

  The present invention relates to a side exhaust type hot water supply apparatus in which an exhaust guide tube is provided at an exhaust port on the front surface of a front cover.

  Conventionally, as a hot water supply apparatus installed outdoors, a side exhaust type hot water supply apparatus that has an exhaust guide tube that covers an exhaust port on the front surface of a front cover, opens one side wall as an exhaust outlet, and performs side exhaust is known. (For example, Patent Documents 1 and 2). According to this side exhaust type hot water supply device, since the exhaust port provided on the front surface of the front cover is not exposed to the outside, it is possible to prevent outside air from directly entering the exhaust port from the front and to improve wind resistance performance. Can do. Further, since the exhaust direction can be changed from the front to the side, it is possible to deal with an installation place such as an alcove.

JP 2001-208339 A Japanese Utility Model Publication No. 6-65732

  However, with an exhaust guide cylinder that has an exhaust outlet only on one side, ventilation resistance increases due to outside air flowing in from the exhaust outlet, which tends to cause exhaust failure, and wind resistance from the side is high. There is a problem that decreases. In particular, when an exhaust guide tube is provided in a hot water supply apparatus provided with an intake port on the front surface of the front cover and combustion exhaust is discharged from the side, the pressure received by the front and the side varies depending on the wind direction. Therefore, when the wind pressure from the side increases, the pressure of the combustion exhaust gas becomes lower than the wind pressure from the side, and the outside air tends to flow into the exhaust guide tube from the exhaust outlet, and the wind resistance performance is likely to be lowered. Further, in recent hot water supply apparatuses, from the viewpoint of thermal efficiency, a first combustion section for hot water supply and a second combustion section for bath or heating having a smaller combustion capacity than the first combustion section are arranged side by side. A product that supplies combustion air to both combustion parts by two common blower fans has been commercialized. In this hot water supply apparatus, there are cases where only the first combustion section is used and where both the first and second combustion sections are used. Therefore, when only the first combustion section is used, combustion exhaust is not generated in the second combustion section, so the exhaust speed of the combustion exhaust from the first combustion section is that of the exhaust from the second combustion section. Will be slower. As a result, the combustion exhaust from the first combustion section discharged to the exhaust guide cylinder may receive ventilation resistance due to the exhaust from the second combustion section and may not be smoothly discharged from the exhaust outlet.

  The present invention has been made to solve the above-mentioned problems, and an object of the present invention is a side exhaust type hot water supply apparatus in which an exhaust guide tube is provided at the exhaust port on the front surface of the front cover. The combustion exhaust is smoothly discharged from the exhaust guide cylinder.

The present invention has an outer case main body having a front opening, in which a combustion part is accommodated,
A front cover that covers the front opening of the exterior case body and includes an exhaust port for discharging combustion exhaust from the combustion unit;
A side exhaust type hot water supply device that communicates with the exhaust port and has an exhaust guide tube provided on a front surface of a front cover so as to cover the exhaust port,
The exhaust guide tube includes a peripheral wall constituting a front wall and an upper and lower wall, one side wall, and the other side wall,
The interior of the exhaust guide tube extends between the one side wall and the other side wall, and does not contact the one side wall but by a partition plate that contacts the other side wall, It is divided into the second passage,
The one side wall has a first opening;
The other side wall is a side exhaust type hot water supply device having a closed portion behind the partition plate and a second opening in front of the partition plate.

  According to the above-described side exhaust type hot water supply apparatus, the inside of the exhaust guide cylinder covering the exhaust port of the front cover is partitioned forward and backward by the partition plate that contacts the other side wall and does not contact one side wall, and the one side wall is Since it has the 1st opening and the other side wall has a blockade in the back of a partition plate, as for the 1st side of the back, the 1st side wall side was connected with the 1st opening, and the other side wall side was closed with the blockade. Formed in a manner. Thereby, the 1st channel | path which an exhaust port faces can be made into the exhaust channel into which combustion exhaust flows only toward a 1st opening from an exhaust port. Further, since the exhaust guide tube has the second opening in front of the other side wall, the second passage in front communicates with the first opening on one side wall side and communicates with the second opening on the other side wall side. Formed in a manner. As a result, the second passage can be used as an outside air passage that guides outside air that has flowed into the exhaust guide tube from the first opening to the second opening. And since the other side wall side of the first passage is closed by the blocking portion and the other side wall side of the second passage is opened by the second opening, the outside air flowing into the exhaust guide cylinder is blocked by the closing portion. Rather than flowing to the first passage side, it is easier to flow to the second passage side having a low ventilation resistance communicating with the outside through the second opening. Thereby, even when the wind pressure from the side is large, the outside air flowing into the exhaust guide tube from the first opening can be smoothly discharged from the second opening through the second passage. An increase in ventilation resistance due to outside air flowing into the exhaust guide cylinder is suppressed, and the combustion exhaust discharged from the exhaust port to the exhaust guide cylinder can be smoothly guided to the first opening.

In the above side exhaust type hot water supply device,
The partition plate may be formed so that a cross-sectional area of the first passage decreases from the other side wall side toward the one side wall side.

  According to the side exhaust type hot water supply device, since the partition plate is formed so that the cross-sectional area of the first passage decreases from the other side wall side toward the one side wall side, the outside air flowing in from the first opening is the first. The two passages facilitate flow, and the combustion exhaust can be more smoothly guided to the first opening. Moreover, since the exhaust velocity of the combustion exhaust gas flowing through the first passage increases toward the first opening, the inflow of outside air into the first passage can be further suppressed.

In the above side exhaust type hot water supply device,
The partition plate may include a throttle portion that reduces a cross-sectional area of the first passage at an end portion on one side wall side.

  According to the above-described side exhaust type hot water supply apparatus, the throttle portion that reduces the cross-sectional area of the first passage is formed at the end portion on the one side wall side of the partition plate, so that the outside air flowing in from the first opening is in the second passage. The combustion exhaust gas can be more smoothly guided to the first opening. Moreover, since the exhaust velocity of the combustion exhaust gas flowing through the first passage becomes faster on the first opening side, the inflow of outside air into the first passage can be further suppressed.

In the above side exhaust type hot water supply device,
The exhaust guide tube may include a rear wall in which an exhaust connection port communicating with the exhaust port is formed.

  According to the above-described side exhaust type hot water supply apparatus, since the exhaust guide cylinder has the rear wall, acidic combustion exhaust exhausted from the exhaust port is difficult to contact the front surface of the front cover, and deterioration of the exterior near the exhaust port is prevented. Can be prevented.

In the side exhaust type hot water supply apparatus, preferably,
The exhaust guide tube is detachably attached to the front cover so that the first opening can be disposed on an arbitrary side.

  According to the above-described side exhaust type hot water supply apparatus, combustion exhaust can be discharged from an arbitrary side, so that the degree of freedom of the installation location of the hot water supply apparatus can be increased.

In the side exhaust type hot water supply apparatus, preferably,
In the exterior case main body, there are a first combustion part, a second combustion part having a smaller combustion capacity than the first combustion part, and juxtaposed with the first combustion part, the first combustion part, A common blower fan for supplying combustion air to the second combustion section is housed;
An exhaust port of the front cover communicates with a first exhaust guide port that discharges combustion exhaust from the first combustion unit and a second exhaust guide port that discharges combustion exhaust from the second combustion unit,
The exhaust guide tube is disposed such that the first opening is located closer to the first exhaust guide port than the second exhaust guide port.

  When the exterior case main body contains a first combustion section, a second combustion section having a smaller combustion capacity than the first combustion section, and a common blower fan that supplies combustion air to both combustion sections, Even if only the combustion unit is used, air is supplied to the second combustion unit from the common blower fan and is discharged to the exhaust port through the second exhaust guide port. At this time, no combustion exhaust gas is generated in the second combustion section, so the exhaust speed of the exhaust from the second combustion section is faster than that of the combustion exhaust from the first combustion section. Therefore, the combustion exhaust discharged from the first combustion section to the exhaust guide cylinder through the first exhaust guide opening is vented by the exhaust discharged from the second combustion section to the exhaust guide cylinder through the second exhaust guide opening. There is a risk that it will be difficult to be discharged from the first opening due to resistance.

  However, according to the above-described side exhaust type hot water supply apparatus, the first opening is provided so as to be located closer to the first exhaust guide port side than the second exhaust guide port side. The combustion exhaust is not easily affected by the exhaust from the second exhaust guide port, and can be discharged smoothly from the first opening.

  As described above, according to the present invention, the inside of the exhaust guide cylinder is partitioned forward and backward by the partition plate that is in contact with the other side wall and not in contact with the one side wall, and the first opening is formed in the one side wall and the partition on the other side wall is provided. By forming the closed portion behind the plate and the second opening forward, the outside air flowing into the exhaust guide cylinder from the first opening flows into the front second passage having a lower airflow resistance than the rear first passage. It becomes easy. Thereby, even if the wind pressure from the side is large, the combustion exhaust from the exhaust port can be smoothly guided to the first opening via the first passage, and thus the side exhaust type hot water supply device having excellent wind resistance performance. Can be provided.

  Further, in the side exhaust type hot water supply apparatus having the first and second combustion portions in the exterior case main body, the first opening is larger than the second exhaust guide port that guides the combustion exhaust from the second combustion portion to the exhaust port. Since the exhaust guide tube is disposed so as to be close to the first exhaust guide port that guides the combustion exhaust from the one combustion unit to the exhaust port, the second exhaust gas is used even when only the first combustion unit is used. The influence of the ventilation resistance due to the exhaust discharged from the guide port can be reduced, and the combustion exhaust discharged from the first exhaust guide port can be smoothly discharged from the first opening.

It is a schematic block diagram which shows an example of the side exhaust type hot water supply apparatus which concerns on Embodiment 1 of this invention. It is a schematic front view which shows an example of the side exhaust type hot water supply apparatus which concerns on Embodiment 1 of this invention. It is a schematic sectional drawing of the principal part of the side exhaust type hot water supply apparatus which concerns on Embodiment 1 of this invention. It is a schematic sectional drawing of the exhaust hood and exhaust pipe of the side exhaust type hot water supply apparatus which concerns on Embodiment 1 of this invention. It is a schematic sectional drawing which shows an example of the exhaust guide cylinder which concerns on Embodiment 1 of this invention. It is a schematic sectional drawing which shows an example of the exhaust guide cylinder which concerns on Embodiment 2 of this invention. It is a schematic sectional drawing which shows another example of the exhaust guide cylinder which concerns on Embodiment 2 of this invention.

(Embodiment 1)
As shown in FIGS. 1 and 2, the side exhaust type hot water supply apparatus of the present embodiment has a rectangular box-shaped outer case 1, and the outer case 1 is an outer case in which a combustion part is accommodated. A main body 3 and a front cover 5 that covers a front opening (not shown) of the outer case 1 are provided. An exhaust guide tube 7 for exhausting combustion exhaust from the side (right side in FIG. 1) is attached to the front surface of the front cover 5 so as to cover the exhaust port 50. In the present specification, the direction in which the exterior case body 3 and the front cover 5 face each other is referred to as the front-rear direction, the width direction of the exterior case body 3 is referred to as the left-right direction, and the height direction of the exterior case body 3 is referred to as the up-down direction.

  The exterior case body 3 is formed by forming a sheet metal into a rectangular box shape with an open front, and a single can 2 is accommodated in the exterior case body 3 as shown in FIG. The can body 2 is composed of a rectangular burner box 20 and a rectangular body frame 30, and an exhaust hood 40 is disposed on the upper part of the body frame 30. A fan 6 is provided.

  As shown in FIG. 3, the inside of the burner box 20 is divided into a left and right by a partition wall W1 into a first burner portion 21 for hot water supply and a second burner portion 22 for heating. Each of the first and second burner portions 21 and 22 includes a plurality of unit burners 210 and 220 that are long in the front-rear direction and arranged in parallel in the left-right direction. In addition, since hot water supply requires a larger heating capacity than heating, more unit burners 210 constituting the first burner part 21 are arranged than unit burners 220 constituting the second burner part 22. In addition, an air supply opening is formed in the bottom plate of the burner box 20, and a discharge portion of the common blower fan 6 is connected to the air supply opening.

  Inside the trunk frame 30, the partition wall W <b> 2, the first main heat exchanger 31 for hot water supply located above the first burner part 21 and the second main heat for heating located above the second burner part 22. The exchanger 32 is divided into left and right. Each of the first and second main heat exchangers 31 and 32 has a large number of endothermic fin groups 310 and 320 stacked with a gap in the front-rear direction, and the front-rear direction passing through the endothermic fin groups 310 and 320. It is composed of a plurality of longitudinal endothermic tubes 311 and 321.

  Inside the exhaust hood 40, a partition wall W3 is used for heating that is located above the first main heat exchanger 31 and for heating that is located above the second main heat exchanger 32. The second sub heat exchanger 42 is divided into left and right.

  As shown in FIG. 4, behind the bottom plate of the exhaust hood 40, the exhaust gas passed through the first main heat exchanger 31 passes through the first exhaust inlet 401 into which the combustion exhaust gas flows and the second main heat exchanger 32. A second exhaust inlet 402 through which combustion exhaust flows is opened. Further, in front of the exhaust hood 40, the partition wall W3 passes through the first exhaust guide port 411 that guides the combustion exhaust that has passed through the first auxiliary heat exchanger 41 to the exhaust cylinder 45, and the second auxiliary heat exchanger 42. A second exhaust guide port 421 that guides the exhausted combustion exhaust to the exhaust cylinder 45 is opened on the left and right sides. Further, an exhaust cylinder 45 is connected to the front end of the exhaust hood 40, and as shown in FIG. 1, an exhaust introduction port 46 of the exhaust cylinder 45 extends from an exhaust port 50 provided at the front end portion of the front cover 5. It is arranged to face the outside.

  Although not shown, the upstream end of the heat absorption pipe 311 of the first main heat exchanger 31 is connected to the water supply pipe via the first auxiliary heat exchanger 41, and the downstream end of the heat absorption pipe 311 of the first main heat exchanger 31. Is connected to the hot water pipe. The upstream end of the heat absorption pipe 321 of the second main heat exchanger 32 is connected to the return pipe of the heating circuit via the second auxiliary heat exchanger 42 and is downstream of the heat absorption pipe 321 of the second main heat exchanger 32. The end is connected to the outgoing pipe of the heating circuit. Therefore, in the present embodiment, the first burner part 21, the first main heat exchanger 31, and the first auxiliary heat exchanger 41 constitute the first combustion part 4 a for hot water supply, the second burner part 22, The second main heat exchanger 32 and the second sub heat exchanger 42 constitute a second combustion section 4b for heating. In addition, you may comprise a combustion part from a burner part and a main heat exchanger, without providing an auxiliary heat exchanger.

  Returning to FIG. 1, the front cover 5 is formed by forming a sheet metal in a shallow dish shape that is open to the rear, and the outer periphery of the rear end of the front cover 5 is substantially dense with the outer periphery of the front end of the front opening of the exterior case body 3. The front opening is closed by the front cover 5.

  Above the front cover 5, a horizontally elongated exhaust port 50 is opened in the left-right direction, and below the front cover 5, a plurality of intake ports 53 for taking in combustion air are opened. . The exhaust port 50 faces the exhaust introduction port 46 of the exhaust cylinder 45 described above. Therefore, by the operation of the common blower fan 6, air is taken into the outer case 1 from the air inlet 53, and the combustion exhaust generated by the combustion of the fuel gas and the combustion air in the first and second burner portions 21 and 22. Is exhausted from the exhaust port 50 after passing through the first and second main heat exchangers 31 and 32 and the first and second sub heat exchangers 41 and 42.

  As described above, the exhaust port 50 is covered with the exhaust guide cylinder 7. As shown in FIGS. 1 and 5, the exhaust guide cylinder 7 of the present embodiment includes a front wall 701 in which a sheet metal is formed in a U shape in a side view, and a main body portion 70 that constitutes a peripheral wall of upper and lower walls 702 and 703. The rear wall 71 connected to the rear open portion of the main body 70, the one side wall 72 (right side in FIGS. 1 and 5) connected to the side open portion on one side of the main body 70, and the main body 70 The other side wall 73 (on the left side in FIGS. 1 and 5) connected to the other side opening portion of the other side wall, and a partition plate 75 extending from the other side wall side to be described later to the one side wall side. The rear wall 71 is not necessarily provided, and the main body 70 may be directly connected to the front cover 5.

  A flange is formed on the rear periphery of the upper and lower walls 702 and 703 of the main body 70, and the main body 70 and the rear wall 71 are connected to the flange and the rear wall 71 facing the flange. A plurality of screw holes are formed. Similarly, flanges are formed on the peripheral edges of both the upper and lower walls 702 and 703 of the main body 70 and the peripheral walls 72 and 73, and the main body 70 and both side walls 72 and 73 are formed on the flange. A plurality of screw holes (not shown) for connecting the two are formed. Further, although not shown, an attachment piece for detachably attaching the exhaust guide cylinder 7 to the front cover 5 is provided on the rear surface of the rear wall 71. Therefore, the exhaust guide cylinder 7 of the present embodiment is configured to be disposed on the front cover 5 in a form in which the left and right directions are switched by turning upside down.

  Further, an exhaust connection port 710 that is slightly larger than the exhaust port 50 of the front cover 5 is formed in the upper, lower, left, and right central portions of the rear wall 71. Further, the first side wall 72 is provided with a first opening 720 on substantially the entire surface. In the other side wall 73, a closed wall 731 (closed portion) is formed in the rear, and a second opening 730 is formed in the front. The first and second openings 720 and 730 incorporate a plurality of wind direction plates 725 and 735 that can be rotated in the front-rear direction so that the exhaust direction can be changed.

  Inside the exhaust guide cylinder 7, when attached to the front cover 5, it is in contact with the upper and lower walls 702 and 703 in the vertical direction at a substantially central portion between the front wall 701 and the rear wall 71 in the front-rear direction. A partition plate 75 extending in a direction substantially parallel to the rear wall 71 is provided. The partition plate 75 is formed larger than the exhaust port 50 so as to face the exhaust port 50 in the vertical and horizontal directions. Further, the partition plate 75 is joined to the other side wall 73 so that the blocking wall 731 is located behind the end portion on the other side wall side and the second opening 730 is located on the front side. The portion does not extend to the one side wall 72, and a certain space is formed between the one side wall end of the partition plate 75 and the one side wall 72. As a result, a first passage 7a is formed inside the exhaust guide cylinder 7 at the rear, one side wall communicating with the first opening 720 and the other side wall blocked by the blocking wall 731. A second passage 7b communicating with the first opening 720 and having the other side wall communicating with the second opening 730 is formed, and the first passage 7a and the second passage 7b communicate with each other in the front-rear direction on one side wall.

  Therefore, when the exhaust guide cylinder 7 is attached to the front surface of the front cover 5, the exhaust port 50 faces the first passage 7a, and the first exhaust guide port 411 from which the combustion exhaust from the first combustion section 4a for hot water supply is discharged. Is located on the first opening side, and the second exhaust guide port 421 from which the combustion exhaust from the second combustion section 4b for heating is discharged is located on the second opening side. The first opening 720 is not necessarily formed on the substantially entire surface of the one side wall 72. However, in consideration of ventilation resistance, it is preferable that the first passage 7a be cut off at the end portion on the one side wall side of the partition plate 75. It has a cross-sectional area larger than the area. The cross-sectional area ratio (first passage cross-sectional area / second passage cross-sectional area) of the first passage 7a and the second passage 7b is preferably about 1 to 4, and the distance between the rear wall 71 and the partition plate 75 Is preferably about ¼ to ½ of the distance in the front-rear direction of the exhaust guide cylinder 7.

  According to the above-described side exhaust type hot water supply apparatus, the exhaust guide cylinder 7 is attached so as to cover the exhaust port 50 from which the combustion exhaust is discharged, so that even if the wind pressure from the front is large, the exhaust gas flows from the exhaust port 50. In addition to preventing outside air, it can also be used in places such as alcove. In addition, the first opening 720 is formed in the one side wall 72, the closing wall 731 is formed behind the other side wall 73, and the partition plate 75 that partitions the inside is in contact with the closing wall 731. The positioned first passage 7 a can function as an exhaust passage that guides the combustion exhaust discharged from the exhaust port 50 to the first opening 720.

  If the wind pressure from the side of the one side wall is large, the amount of outside air flowing into the exhaust guide cylinder 7 from the first opening 720 increases, and the combustion exhaust is not easily discharged from the first passage 7a toward the first opening 720. Become. In particular, when the air pressure from the side on the one side wall side is large in the hot water supply device provided with the air inlet 53 on the front surface, the side air pressure is higher than the wind pressure of the outside air taken into the exterior case 1 from the front air inlet 53. The wind pressure of the outside air flowing into the exhaust guide cylinder 7 from the first opening 720 increases. As a result, the pressure of the combustion exhaust gas becomes lower than the wind pressure of the outside air flowing in from the side, the outside air easily flows into the exhaust guide cylinder 7 from the first opening 720, and the wind resistance performance is likely to be lowered. However, since the second side wall 73 of the exhaust guide cylinder 7 is formed with a second opening 730 communicating with the outside in the front, the second passage 7b located in the front is connected to the exhaust guide cylinder 7 from the first opening 720. It is possible to function as an outside air passage that guides outside air flowing into the second opening 730. Since the other side wall side of the first passage 7a is closed by the blocking wall 731 and the other side wall side of the second passage 7b is opened by the second opening 730, the outside air flowing into the exhaust guide cylinder 7 is blocked by the blocking wall 731. Rather than flowing to the first passage side closed by the second opening 730, the second opening 730 communicates with the outside and flows to the second passage side having low ventilation resistance. Thereby, without increasing the volume of the exhaust guide cylinder 7, it becomes difficult for outside air to flow to the first passage side, and the combustion exhaust can be smoothly discharged from the exhaust port 50 to the first opening 720. Even if the wind pressure from the side of the other side wall is large, the other side wall side of the first passage 7a communicating with the exhaust port 50 is blocked by the blocking wall 731. It is possible to prevent an increase in ventilation resistance due to.

  Further, the side exhaust type hot water supply apparatus includes a first combustion section 4a for hot water supply and a second combustion section 4b for heating having a combustion capacity smaller than that of the first combustion section 4a. Only the 1st combustion part 4a may be used. And since combustion air is supplied to both the combustion parts 4a and 4b by the common ventilation fan 6, even when only the 1st combustion part 4a is used, it is air from the common ventilation fan 6 to the 2nd combustion part 4b. Is supplied to the exhaust port 50 through the second exhaust guide port 421. At this time, combustion exhaust is not generated in the second combustion unit 4b, and therefore the exhaust speed of the exhaust from the second combustion unit 4b is faster than that of the combustion exhaust from the first combustion unit 4a. Therefore, the combustion exhaust discharged from the first combustion section 4a to the exhaust guide cylinder 7 via the first exhaust guide opening 411 is transferred from the second combustion section 4b to the exhaust guide cylinder 7 via the second exhaust guide opening 421. There is a risk that the exhausted air is subjected to ventilation resistance and is difficult to be smoothly discharged from the first opening 720.

  However, since the exhaust guide cylinder 7 is provided such that the first opening 720 is positioned closer to the first exhaust guide port than the second exhaust guide port, combustion exhaust from the first exhaust guide port 411 is performed. However, it is difficult to be influenced by the exhaust from the second exhaust guide port 421 and can be smoothly discharged from the first opening 720.

  Since the exhaust guide cylinder 7 is detachably attached to the front cover 5, the exhaust guide cylinder 7 can be turned upside down and attached to the front cover 5 to change the exhaust direction of the combustion exhaust. . Thereby, since combustion exhaust can be discharged | emitted from arbitrary sides, the freedom degree of the installation place of a hot water supply apparatus can be raised.

(Embodiment 2)
In the first embodiment, the partition plate 75 is formed so as to extend substantially in parallel with the rear wall 71 in the left-right direction in the exhaust guide cylinder 7, but as shown in FIG. The partition plate 75a may be formed so that the first passage 7a becomes narrower from the other side wall side toward the one side wall side. Thereby, the outside air flowing in from the first opening 720 can easily flow through the second passage 7b, and the combustion exhaust can be more smoothly guided to the first opening 720. Further, since the cross-sectional area of the first passage 7a becomes smaller toward the downstream side, the exhaust speed of the combustion exhaust gas becomes faster toward the first opening 720, and the inflow of outside air to the first passage 7a can be further suppressed.

  Moreover, as shown in FIG. 7, the partition plate 75b may have a narrowed portion 751 in which the first passage 7a is narrowed at an end portion on one side wall side. Thereby, since the outside air which flows in from the 1st opening 720 becomes easy to flow in into the 2nd channel | path 7b, wind resistance performance can be improved more. In addition, since the exhaust speed of the combustion exhaust is increased on the first opening side, the inflow of outside air into the first passage 7a can be further suppressed.

(Other embodiments)
(1) Although the hot water supply apparatus in which the first and second combustion parts are accommodated in the exterior case body has been described in the above embodiment, a single combustion part may be accommodated in the exterior case body. .

(2) In the above-described embodiment, the quadrangular prism-shaped exhaust guide cylinder is used, but the shape of the exhaust guide cylinder is not particularly limited. For example, the side wall may have a semicircular shape, or may have another polygonal shape. In the exhaust guide cylinder having a semicircular side wall, a main body having a peripheral wall formed by integrating the front wall and the upper and lower walls can be used.

(3) In the above embodiment, the intake port is provided on the front surface of the front cover. However, in order to reduce the difference in wind pressure depending on the wind direction, the intake port may be provided on the side. Similarly to the exhaust guide cylinder, the intake port may be covered with an intake guide cylinder having an opening on the side.

(4) In the above embodiment, a front cover provided with one exhaust port is used, but a front cover provided with two exhaust ports communicating with each of the two exhaust guide ports may be used.

DESCRIPTION OF SYMBOLS 3 Exterior case main body 4a 1st combustion part 4b 2nd combustion part 411 1st exhaust guide port 421 2nd exhaust guide port 5 Front cover 50 Exhaust port 6 Common ventilation fan 7 Exhaust guide cylinder 71 Rear wall 72 One side wall 73 The other side wall 75 Partition plate 710 Exhaust connection port 720 First opening 731 Blocking wall (blocking portion)
730 2nd opening 751 Restriction part 7a 1st channel | path 7b 2nd channel | path

Claims (6)

An exterior case body having a front opening and containing a combustion portion therein;
A front cover that covers the front opening of the exterior case body and includes an exhaust port for discharging combustion exhaust from the combustion unit;
A side exhaust type hot water supply device that communicates with the exhaust port and has an exhaust guide tube provided on a front surface of a front cover so as to cover the exhaust port,
The exhaust guide tube includes a peripheral wall constituting a front wall and an upper and lower wall, one side wall, and the other side wall,
The interior of the exhaust guide cylinder extends between the one side wall and the other side wall, and does not contact the one side wall, but by a partition plate that contacts the other side wall, It is divided into the second passage,
The one side wall has a first opening;
The other side wall is a side exhaust type hot water supply apparatus having a closed portion behind the partition plate and a second opening in front of the partition plate. In the side exhaust type hot water supply device according to claim 1,
The partition plate is a side exhaust type hot water supply device formed such that a cross-sectional area of the first passage decreases from the other side wall side toward the one side wall side. In the side exhaust type hot water supply device according to claim 1 or 2,
The partition plate is a side exhaust type hot water supply device having a throttle portion that reduces a cross-sectional area of the first passage at an end portion on one side wall side. In the side exhaust type hot water supply device according to any one of claims 1 to 3,
The exhaust gas guide cylinder is a side exhaust type hot water supply apparatus including a rear wall in which an exhaust connection port communicating with the exhaust port is formed. In the side exhaust type hot water supply device according to any one of claims 1 to 4,
The exhaust guide cylinder is a side exhaust type hot water supply apparatus that is detachably attached to the front cover so that the first opening can be disposed on an arbitrary side. It is a side exhaust type hot-water supply apparatus of any one of Claims 1-5,
In the exterior case main body, there are a first combustion part, a second combustion part having a smaller combustion capacity than the first combustion part, and juxtaposed with the first combustion part, the first combustion part, A common blower fan for supplying combustion air to the second combustion section is housed;
An exhaust port of the front cover communicates with a first exhaust guide port that discharges combustion exhaust from the first combustion unit and a second exhaust guide port that discharges combustion exhaust from the second combustion unit,
The exhaust gas guide cylinder is a side exhaust type hot water supply device in which the first opening is disposed so as to be positioned closer to the first exhaust guide port side than to the second exhaust guide port side.

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