JP2024072637A - Exhaust adaptor - Google Patents

Abstract

To provide an exhaust adaptor capable of removing a front cover of a combustion device without removing the exhaust adaptor, even in the combustion device provided with the exhaust adaptor.SOLUTION: An exhaust adaptor 1 includes: a cylindrical main body 2 including a side wall 6 and an upper wall 7 and opened at the lower part; an exhaust outlet 11 opened in the side wall 6 of the main body 2 for discharging combustion exhaust; an exhaust connecting portion 4 disposed in the main body 2 and connected to an exhaust cylinder 40 of a combustion device 30; an exhaust flow passage portion 5 disposed in the main body 2 to connect from the exhaust connecting portion 4 to the exhaust outlet 11; a cutout portion 20 formed on the side wall 6 at a front side where a front cover 34 of the combustion device 30 is positioned, of the side wall 6 of the main body 2 from the lower end over a prescribed height and a prescribed width; and a front lid 8 openably and closably covering the cutout portion 20.SELECTED DRAWING: Figure 3

Description

The present invention relates to an exhaust adapter that connects to a combustion device, for example, an exhaust adapter that allows an indoor combustion device to be adapted to an outdoor installation.

Combustion equipment such as hot water heaters are equipped with an exhaust pipe that discharges combustion exhaust. In indoor combustion equipment, the exhaust pipe is connected to an exhaust pipe installed in the wall of the building, so the exhaust pipe is often installed protruding from the top of the combustion equipment. In outdoor combustion equipment, the exhaust pipe is installed on the front or side of the combustion equipment to prevent the combustion exhaust from directly hitting the wall or eaves of the building. As the exhaust system structure differs between indoor and outdoor combustion equipment, combustion equipment manufacturers must produce combustion equipment according to indoor and outdoor installation types, and users must also purchase a new combustion equipment when changing from indoor installation to outdoor installation.

In a conventional combustion device with an exhaust pipe on the top, a technology was known in which an exterior case with an exhaust window on the front was installed on the top of the combustion device so that the combustion exhaust was directed only forward (Patent Document 1).

Japanese Patent Application Laid-Open No. 5-187721

However, the above-mentioned conventional technology does not convert a combustion device from an indoor installation type to an outdoor installation type. The inventor has considered developing a new exhaust adapter that can convert an indoor installation type combustion device into an outdoor installation type combustion device. When installing an exhaust adapter on the top surface of a combustion device, if one tries to improve the design from the front by making the exhaust adapter look one with the combustion device, the exhaust adapter will cover the fixing means of the front cover arranged on the top surface of the combustion device and the upper end of the front cover. In this case, in order to remove the front cover for maintenance of the combustion device, it is necessary to remove the exhaust adapter once, which creates the problem of reducing the workability of maintenance, etc.

The present invention was made in consideration of the above circumstances, and aims to provide an exhaust adapter that allows the front cover of a combustion device to be removed without removing the exhaust adapter, even when the exhaust adapter is attached to the combustion device.

The exhaust adapter according to the present invention comprises:
An exhaust adapter connected to a combustion device including a box-shaped casing having an opening at a front portion, a front cover that covers the opening and is removably fixed to the casing, and an exhaust pipe that protrudes upward from a top surface of the casing,
A box-shaped main body having side walls and an upper wall and an open lower portion;
an exhaust outlet opening in a side wall of the main body and discharging combustion exhaust gas;
an exhaust connection portion provided in the main body and connected to the exhaust tube;
an exhaust flow passage portion provided in the main body and connecting the exhaust connection portion to the exhaust outlet;
a cutout portion provided on a front side wall of the main body where the front cover is located, the cutout portion being provided from a lower end of the front side wall over a predetermined height and a predetermined width;
The device is configured to include a front cover that opens and closes the cutout portion.

With the above configuration, by retracting the front lid and opening the cutout, the exhaust adapter can be prevented from interfering when removing the front cover of the combustion device. Furthermore, even if the upper end of the front cover has a fixing means to the casing, the fixing means can be released through the cutout. Therefore, the front cover of the combustion device can be removed from the casing while still attached to the combustion device without removing the exhaust adapter. Therefore, even if the combustion device has an exhaust adapter attached, the front cover can be removed without hassle.

In the exhaust adapter,
The front cover may be fixed to the main body by a hinge so as to be openable and closable relative to the notch.

With this configuration, the front cover of the combustion device can be removed by opening the front cover without having to completely remove it from the exhaust adapter. This improves the ease of removal of the front cover.

In the exhaust adapter,
The hinge may be configured to have an engaging portion and an engaged portion that hold the front cover in an open position.

With this configuration, the hinge holds the front lid in the open position, eliminating the need for the operator to hold the front lid in the open position, further improving the ease of removal of the front cover.

In the exhaust adapter,
A fastening portion for fixing the main body to the combustion device may be provided within the main body.

With this configuration, the fastening parts are concealed within the main body, improving the appearance of the combustion device to which the exhaust adapter is attached. In addition, when attaching the exhaust adapter to the combustion device, the front cover can be opened and the fastening parts can be fastened from the front side of the combustion device through the cutout, improving workability when attaching the exhaust adapter.

1 is a front view showing a combustion device according to an embodiment of the present invention. 1 is a schematic diagram showing an internal configuration of a combustion device according to an embodiment of the present invention. 1 is a perspective view showing a combustion device according to an embodiment of the present invention when a front cover of an exhaust adapter is in an open state. FIG. 1 is a front view showing the combustion device when the front cover of the exhaust adapter of the present embodiment is in an open state. FIG. 1 is a perspective view showing a state in which the exhaust adapter of the present embodiment is installed on a top surface of a combustion apparatus. FIG. 1A is a perspective view showing the exhaust adapter of the present embodiment when the front cover is in a closed state, and FIG. 1B is a perspective view showing the exhaust adapter of the present embodiment when the front cover is in an open state. FIG. 2 is a cross-sectional view showing the exhaust adapter of the present embodiment. FIG. 2 is a perspective view showing the exhaust adapter of the present embodiment from the bottom side. FIG. 2 is an enlarged partial cross-sectional view of a hinge portion that attaches the front cover. 1A is a cross-sectional view showing the positional relationship of the engagement portion of the hinge when the front cover is in a closed state (FIG. 1A), and FIG. 1B is a cross-sectional view showing the positional relationship of the engagement portion of the hinge when the front cover is in an open state (FIG. 1B).

Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.
1 to 4 constitutes a hot water supply device, and includes a box-shaped casing 32 having an open section 31 at the front, and a front cover 34 that covers the open section 31 and is removably fixed to the casing 32, with the casing 32 and the front cover 34 constituting an apparatus main body that forms the outer shell of the apparatus. Note that in this specification, the front cover 34 side of the combustion device 30 is defined as the front side in Figs. 1 and 3, and the positional relationships of front/rear, left/right, and up/down are defined.

As shown in FIG. 2, the casing 32 is provided with a combustion section 35, a heat exchange section 36, a blowing means 37, an air supply section 38, and an exhaust section 39. The exhaust section 39 has a cylindrical exhaust tube 40 at the exhaust downstream section. The air supply section 38 has a cylindrical air supply tube 41 at the air supply upstream section, and a ring-shaped air supply tube 42 with the exhaust tube 40 disposed on the inner circumference. The exhaust tube 40, the air supply tube 41, and the ring-shaped air supply tube 42 are disposed protruding upward from the top surface section 33 of the casing 32 (which is also the top surface section of the combustion device 30). The air supply means 37 mixes the air introduced from the air supply section 38 into the combustion device 30 with the fuel gas supplied from the fuel supply pipe 43, and supplies the mixed gas to the combustion section 35. The combustion section 35 burns the mixed gas with a burner (not shown) provided in the combustion section 35 to generate combustion exhaust. The heat exchanger 36 heats the fluid (water) flowing from the water supply pipe 44 to the heat transfer pipe (not shown) using the combustion exhaust air sent from the combustion section 35. The fluid heated in the heat exchanger 36 flows out of the heat transfer pipe into the hot water outlet pipe 45 and is supplied to the hot water supply terminal. The combustion exhaust air after the fluid is heated in the heat exchanger 36 is discharged outside the appliance through the exhaust section 39.

The front cover 34 has a rectangular front portion that matches the open portion 31 of the casing 32, and has a shallow box shape with a peripheral wall portion extending rearward formed on the outer periphery of the front portion. The front cover 34 is fixed at a vertical position relative to the open portion 31 of the casing 32. Specifically, as shown in Figures 3, 4, and 5, the top surface 33 of the casing 32 is provided with a snap lock 46 at the left and right positions on the front side, and the upper peripheral wall of the front cover 34 is provided with hooks 47 for hanging the snap lock 46 at the left and right positions on the upper surface. The lower portion of the open portion 31 of the casing 32 is provided with an attachment portion 48 (see Figure 2) having a screw hole, and the lower peripheral wall of the front cover 34 is provided with a fixing piece 49 having a through hole for passing a screw 49a. As a result, the front cover 34 is placed in the open section 31 of the casing 32, the snap lock 46 on the top surface 33 of the casing 32 is engaged with the hook 47 on the upper part of the front cover 34, and the mounting part 48 on the lower part of the casing 32 and the fixing piece 49 on the lower part of the front cover 34 are fixed with a screw 49a, so that the front cover 34 is removably fixed to the open section 31 of the casing 32. Note that the fixing means for the upper part of the front cover 34 may be other fixing means such as a screw other than the snap lock 46.

In this embodiment, an exhaust adapter 1 that connects to an exhaust pipe 40 is installed on the top surface 33 of the combustion device 30. The combustion device 30 can be applied to an indoor installation type combustion device 30 without the exhaust adapter 1 installed on the top surface 33, and to an outdoor installation type combustion device 30 with the exhaust adapter 1 installed on the top surface 33. That is, by installing the exhaust adapter 1 on the top surface 33 of the indoor installation type combustion device 30, it can be converted to an outdoor installation type combustion device 30. However, if the exhaust adapter 1 is installed to cover the entire top surface 33 of the combustion device 30, the fixing means (46, 47) on the upper part of the front cover 34 and the upper end part of the front cover 34 are covered by the exhaust adapter 1. In this case, in order to remove the front cover 34 for maintenance of the combustion device 30, it is necessary to remove the exhaust adapter 1 once. However, in this embodiment, even if the exhaust adapter 1 is installed to make the outdoor installation type combustion device 30, the exhaust adapter 1 is configured so that the front cover 34 of the combustion device 30 can be removed without attaching the exhaust adapter 1.

The exhaust adapter 1 of this embodiment will be described below.
6, 7 and 8, the exhaust adapter 1 of this embodiment includes a main body 2 which is an external component, and an exhaust guiding fluid 3 which is an internal component provided within the main body 2. The exhaust guiding fluid 3 is composed of an exhaust connection portion 4 and an exhaust flow path portion 5.

The main body 2 is formed in a box shape with a side wall 6 and an upper wall 7 and an open bottom. The upper wall 7 of the main body 2 has a rectangular shape and is an inclined surface with the front part higher than the rear part. The side wall 6 of the main body 2 extends downward from the peripheral part of the upper wall 7. An openable front cover 8 is attached to the front side wall 6. The front cover 8 has a shape that bulges forward and is formed with dimensions that are flush with the front cover 34 of the combustion device 30 when closed. The rear side wall 6 is formed with dimensions that are flush with the back surface of the casing 32 of the combustion device 30. The front cover 8 and the rear side wall 6 are formed with dimensions such that the lower ends are approximately the same as the upper end of the front cover 34 and the upper end of the back surface of the casing 32. The left and right side walls 6 have a bulging shape with the lower parts bulging outward from near the middle part in the vertical direction to the lower end, and are formed with dimensions that are flush with the left and right surfaces of the casing 32 of the combustion device 30. The left and right side walls 6 are formed to a dimension such that their lower ends extend to a position that covers the rounded corners between the left and right sides and the top surface of the casing 32. In this way, when the exhaust adapter 1 is installed on the top surface 33 of the combustion device 30, the main body 2 of the external part covers the top surface 33 of the combustion device 30 and is flush with the front, rear, left and right sides of the device main body 2, giving it a sense of unity with the combustion device 30 and improving the design from the front. The main body 2 of the exhaust adapter 1 may be slightly larger or smaller than the top surface 33 of the combustion device 30, and the lower end of the main body 2 may extend to a position that somewhat covers the upper part of the combustion device 30. In this embodiment, the main body 2, the exhaust guiding fluid 3, and the front cover 8 are molded from a resin material.

The lower part of the left and right side walls 6 of the main body 2 is provided with an air intake port 9 that opens horizontally in the front-rear direction. Near the left and right side walls 6 in the main body 2, a guide plate 10 (see FIG. 8) is provided that faces the air intake port 9 and extends parallel to the side walls 6. The air that flows into the main body 2 from the outside through the air intake port 9 is guided downward by this guide plate 10 to the air intake cylinder 41 and the ring-shaped air intake cylinder 42 on the top surface 33 of the combustion device 30. The upper part of the front side wall 6 from the upper end to the vicinity of the middle part is an inclined surface that faces diagonally upward. This inclined surface is provided with an exhaust outlet 11 that opens horizontally in the left-right direction. The exhaust outlet 11 is connected to the exhaust flow path section 5 in the main body 2 so that it communicates with it. On the inner surface of the front side wall 6 that forms the exhaust outlet 11, a plate-shaped insertion protrusion 12 that protrudes into the main body 2 is provided at the upper and lower parts of the exhaust outlet 11. The upper and lower insertion protrusions 12 are arranged in the exhaust flow passage 5, and form a space that retains the combustion exhaust gas on the periphery of the exhaust outlet 11 to prevent a drop in temperature of the side wall 6 around the exhaust outlet 11. In addition, on the inner surface of the front side wall 6, receiving plate portions 60 with outer ends curved upward are provided at left and right positions below the lower insertion protrusion 12. The left and right receiving plate portions 60 are provided so as to fit along the outer periphery of the corners of the flange 14 of the exhaust flow passage 5 arranged on the inner surface of the front side wall 6.

As shown in FIG. 7, the exhaust guiding fluid 3 includes an exhaust connection part 4 that is connected to the exhaust tube 40 of the combustion device 30, and an exhaust flow passage part 5 that connects the exhaust connection part 4 to the exhaust outlet 11 of the main body 2. The exhaust connection part 4 and the exhaust flow passage part 5 are integrated, and their respective internal spaces are connected to each other.

The exhaust connection part 4 is formed in a cylindrical shape so as to follow the inner peripheral shape of the exhaust tube 40 of the combustion device 30. The upper end part of the exhaust connection part 4 is joined to the exhaust flow path part 5. The lower part of the exhaust connection part 4 is inserted into the exhaust tube 40 of the combustion device 30 via a cylindrical packing (not shown) and is connected so as to communicate with the exhaust tube 40.

The exhaust flow passage section 5 has an internal space through which the combustion exhaust of the combustion device 30 flows, and is formed in a flat box shape with a horizontally long opening 13 at the front end. The exhaust connection section 4 is joined to the center of the bottom surface of the exhaust flow passage section 5 so as to communicate with the internal space. An outward flange 14 is formed on the outer periphery of the opening 13 of the exhaust flow passage section 5. The flange 14 of the exhaust flow passage section 5 is connected by pressing it against the front side wall 6 inside the main body 2 at the outer periphery of the exhaust outlet 11 with an annular packing 15 arranged thereon. As a result, the opening 13 of the exhaust flow passage section 5 is connected to the exhaust outlet 11 of the main body 2, and the combustion exhaust of the combustion device 30 is discharged from the exhaust tube 40 through the exhaust connection section 4 and the exhaust flow passage section 5 to the outside from the exhaust outlet 11.

The rear of the exhaust flow passage section 5 is formed with a bulge section 16 that bulges outward in a roughly U-shape, and the outer surface of the bulge section 16 is provided with a fixing section 17 that is fixed to the main body 2 with a screw at the middle part in the left-right width direction. The rear part of the inner surface of the upper wall 7 of the main body 2 is provided with a sliding guide section 18 that is pressed against the outer surface of the bulge section 16 of the exhaust flow passage section 5, and a fixing base 19 that is fixed to the fixing section 17 of the exhaust flow passage section 5 with a screw. The sliding guide sections 18 are provided in a total of four places, two corresponding to the left and right end positions of the bulge section 16 and two corresponding to the central position. The fixing base 19 has a screw hole and is provided at one place corresponding to the middle part of the bulge section 16. The exhaust flow passage section 5 is attached to the main body 2 by fixing the fixing section 17 to the fixing base 19 with a screw while the bulge section 16 is pressed against the sliding guide section 18. The front part of the sliding guide 18 is formed with a concave arc-shaped part 18a that is inclined forward from the tip side to the base end side. The outer surface of the bulging part 16 of the exhaust flow passage part 5 is formed with a convex arc-shaped surface 16a. As a result, the exhaust flow passage part 5 is pressed forward by the sliding guide part 18 as the convex arc-shaped surface 16a of the bulging part 16 is pressed from the tip side to the base end side into the concave arc-shaped part 18a of the sliding guide part 18, and the packing 15 arranged between the flange 14 of the exhaust flow passage part 5 and the front side wall 6 inside the main body 2 is kept in a highly compressed state. Therefore, the packing 15 ensures high airtightness between the opening 13 of the exhaust flow passage part 5 and the exhaust outlet 11 of the main body 2, and the exhaust flow passage part 5 is sealed so that the combustion exhaust and condensation water in the exhaust flow passage part 5 do not leak from the opening 13 into the main body 2.

In this embodiment, the front side wall 6 of the main body 2 has a notch 20 cut across the entire width from the bottom end to near the middle at a predetermined height. A front lid 8 that covers the notch 20 is attached to the front side wall 6. The front lid 8 is fixed to the main body 2 by a hinge 21 so that it can be opened and closed relative to the notch 20. The hinges 21 are provided at the upper end of the notch 20 and at left and right positions on the top of the front lid 8, and the front lid 8 can be rotated upward to open it. The notch 20 is released by opening the front lid 8.

9 and 10, the hinge 21 is composed of a cylindrical hinge shaft 23 provided between two arms 22 protruding forward from the upper end of the cutout 20, and two hinge clamping plates 24 protruding from the upper inner surface of the front cover 8 and sandwiching the hinge shaft 23. The hinge shaft 23 is provided with a rib-shaped convex portion 25 (engagement portion), and the hinge clamping plates 24 are provided with a concave portion 26 (engaged portion) into which the convex portion 25 fits. When the front cover 8 is in the closed position, the convex portion 25 of the hinge shaft 23 and the concave portion 26 of the hinge clamping plates 24 are formed in a positional relationship such that they do not engage with each other (see FIG. 10(a)). When the front cover 8 is rotated upward to the open position, the convex portion 25 of the hinge shaft 23 and the concave portion 26 of the hinge clamping plates 24 engage with each other, and the front cover 8 is held in the open position (see FIG. 10(b)). In this embodiment, the hinge 21 is provided at the top of the front cover 8, but the hinge 21 may be provided at the side edge of the right or left end of the front cover 8 to make the front cover 8 open to the right or left, or the front cover 8 may be divided into left and right halves and hinges 21 provided at both the left and right ends of the front cover 8 to make the front cover 8 open like a double door.

The left and right side ends of the front cover 8 are bent to fit the left and right side walls 6 of the main body 2, and an engagement piece 27 (see FIG. 9) is provided at the rear end of this bent portion. An engagement protrusion 28 (see FIG. 9) that engages with the engagement piece 27 of the front cover 8 is provided on the inner surface of the front edge of the left and right side walls 6. When the front cover 8 is in the closed position, the engagement piece 27 of the front cover 8 engages with the engagement protrusions 28 of the left and right side walls 6, and the front cover 8 is held in the closed position so that it does not open easily. In this embodiment, the means for holding the front cover 8 in the closed position is the engagement means by the engagement piece 27 and the engagement protrusions 28, but it may also be an attraction means such as a magnet.

According to the above configuration, according to the exhaust adapter 1 of this embodiment, when performing maintenance of the combustion device 30, the front cover 34 of the combustion device 30 can be removed by opening the front cover 8 and retracting it to open the cutout 20, so that the exhaust adapter 1 does not interfere with the front cover 34 of the combustion device 30 (see FIG. 3). Therefore, the front cover 34 of the combustion device 30 can be removed from the casing 32 while attached to the combustion device 30 without removing the exhaust adapter 1. Therefore, even if the combustion device 30 is in a state where the exhaust adapter 1 is attached, the front cover 34 can be removed without any trouble. In addition, since the front cover 8 is fixed to the main body 2 by the hinge 21 so as to be openable and closable with respect to the cutout 20, the front cover 34 of the combustion device 30 can be removed by opening the front cover 8 without completely removing the front cover 8 from the main body 2 of the exhaust adapter 1. Therefore, the workability when removing the front cover 34 can be improved. Furthermore, the hinge 21 is provided with an engaging portion 25 and an engaged portion 26 (see FIG. 10) that hold the front lid 8 in the open position. By holding the front lid 8 in the open position through the engagement of the engaging portion 25 and the engaged portion 26 of the hinge 21, the worker does not need to hold the front lid 8 in the open position, which further improves the ease of removal of the front cover 34.

In addition, the main body 2 of the exhaust adapter 1 is provided with a fixing plate portion 51 (see Figures 4, 5, 7, etc.) that serves as a fastening portion for attaching the exhaust adapter 1 to the top surface portion 33 of the combustion device 30. The fixing plate portion 51 is provided on the inner surface of the left and right side walls 6, and has a through hole for passing a screw 51a. The left and right fixing plate portions 51 are arranged so that the through hole for the screw 51a faces the front cutout portion 20 side. An L-shaped fixing part 52 (see Figure 5) having a screw hole for the screw 51a is attached to the left and right ends of the top surface portion 33 of the combustion device 30. The left and right fixing parts 52 are arranged so that the screw hole faces forward. Therefore, the exhaust adapter 1 is attached to the top surface portion 33 of the combustion device 30 by fixing the left and right fixing plate portions 51 to the left and right fixing parts 52 of the combustion device 30 with the screw 51a.

As shown in FIG. 5, when attaching the exhaust adapter 1 to the top surface 33 of the combustion device 30, an L-shaped fixing part 52 is attached to the top surface 33 of the combustion device 30 with screws or the like. Then, the exhaust connection part 4 of the exhaust adapter 1 is inserted into the exhaust tube 40 of the combustion device 30, and the exhaust adapter 1 is placed on the top surface 33 of the combustion device 30. When the exhaust adapter 1 is placed on the top surface 33 of the combustion device 30, the front cover 8 is opened so that the fixing plate part 51 in the main body 2 of the exhaust adapter 1 and the fixing part 52 on the top surface 33 of the combustion device 30 are fixed with screws 51a from the front side of the combustion device 30 through the cutout part 20 of the exhaust adapter 1. This allows the exhaust adapter 1 to be attached to the top surface 33 of the combustion device 30.

The fixing plate portion 51 of the exhaust adapter 1 and the fixing part 52 of the combustion device 30 are concealed within the main body 2 of the exhaust adapter 1 by closing the front cover 8 of the exhaust adapter 1. By providing the fixing plate portion 51, which is the fastening part, within the main body 2 of the exhaust adapter 1 in this way, the appearance of the combustion device 30 to which the exhaust adapter 1 is attached can be improved. In addition, when attaching the exhaust adapter 1 to the combustion device 30, the work of screwing the fixing plate portion 51 and the fixing part 52 in the main body 2 can be performed from the front side of the combustion device 30 through the cutout portion 20 while holding the front cover 8 in an open state. Therefore, since the installation work of the exhaust adapter 1 can be performed from the front side of the combustion device 30, the workability of attaching the exhaust adapter 1 to the combustion device 30 can be improved compared to the case where the work is performed from the top surface portion 33 side of the combustion device 30.

The present invention is not limited to the above-described embodiment, and can be modified as desired within the scope of the claims.
For example, the front cover 8 of the exhaust adapter 1 may be configured to be completely removable from the main body 2 of the exhaust adapter 1. In addition, in this embodiment, the air supply cylinder 41 and the ring-shaped air supply cylinder 42 are provided on the top surface 33 of the combustion device 30, and the air that flows into the main body 2 from the outside through the air supply port 9 is guided to the air supply cylinder 41 and the ring-shaped air supply cylinder 42, but one of them may be closed and air may be supplied into the combustion device 30 only from the other, or only one of the air supply cylinder 41 or the ring-shaped air supply cylinder 42 may be provided on the top surface 33 of the combustion device 30. Furthermore, the front cover 8 may be made detachable from the main body 2 and replaced with a front cover having a different design. In this way, even if the design of the front cover of the combustion device 30 is changed, the front cover can be replaced with one that matches it, thereby maintaining a sense of unity in the design.

1 exhaust adapter 2 main body 3 exhaust flow guide 4 exhaust connection section 5 exhaust flow passage section 6 side wall 7 upper wall 8 front cover 9 air intake port 10 guide plate 11 exhaust outlet 12 insertion protrusion 13 opening 14 flange 15 packing 16 bulge 16a convex arc surface 17 fixing section 18 sliding guide section 18a concave arc section 19 fixed base 20 notch 21 hinge 22 arm 23 hinge shaft 24 hinge clamp plate 25 protrusion 26 concave section 27 engagement piece 28 engagement protrusion 30 combustion device 31 open section 32 casing 33 top surface 34 front cover 35 combustion section 36 heat exchange section 37 blower means 38 air intake section 39 exhaust section 40 exhaust tube 41 air intake tube 42 ring-shaped air intake tube 43 fuel supply pipe 44 water supply pipe 45 Hot water outlet pipe 46 Snap lock 47 Hook 48 Mounting part 49 Fixing piece 51 Fixing plate part 52 Fixing part

Claims (4)

An exhaust adapter connected to a combustion device including a box-shaped casing having an opening at a front portion, a front cover that covers the opening and is removably fixed to the casing, and an exhaust pipe that protrudes upward from a top surface of the casing,
A box-shaped main body having side walls and an upper wall and an open lower portion;
an exhaust outlet opening in a side wall of the main body and discharging combustion exhaust gas;
an exhaust connection portion provided in the main body and connected to the exhaust tube;
an exhaust flow passage portion provided in the main body and connecting the exhaust connection portion to the exhaust outlet;
a cutout portion provided on a front side wall of the main body where the front cover is located, the cutout portion being provided from a lower end of the front side wall over a predetermined height and a predetermined width;
and a front cover that opens and closes the cutout portion. 2. The exhaust adapter of claim 1,
The front cover is fixed to the main body by a hinge so as to be openable and closable relative to the cutout portion. 3. The exhaust adapter according to claim 2,
The hinge is provided with an engaging portion and an engaged portion that hold the front cover in an open position. The exhaust adapter according to any one of claims 1 to 3,
An exhaust adapter, the exhaust adapter including a fastener disposed within the body for securing the body to the combustion device.

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