Exhaust adapter

Abstract

Provided is an exhaust adapter capable of removing a front cover of a combustion device without removing the exhaust adapter even in the combustion device to which the exhaust adapter is attached. The exhaust adapter 1 including a box-shaped main body 2. The main body 2 including a side wall 6 and an upper wall 7 and having an open lower side. The side wall 6 of the main body 2 includes a cutout portion 20 provided over a predetermined height and a predetermined width from a lower end of the side wall 6 on a front side where a front cover 34 of a combustion device 30 is located, and a front lid 8 openably and closably covering the cutout portion 20.

Description

TECHNICAL FIELD

[0001] The present invention relates to an exhaust adapter connected to a combustion device, and for example, relates to an exhaust adapter capable of applying an indoor installation type combustion device to an outdoor installation type.BACKGROUND ART

[0002] A combustion device such as a hot water supply device includes an exhaust cylinder that discharges combustion exhaust gas. In an indoor installation type combustion device, since an exhaust cylinder is connected to an exhaust pipe installed on a wall of a building, the exhaust cylinder is often provided so as to protrude from a top surface portion of the combustion device. In an outdoor installation type combustion device, in order to prevent combustion exhaust gas from directly hitting a wall, an eaves, or the like of a building, an exhaust cylinder is provided on a front surface portion or a side surface portion of the combustion device. As described above, since the combustion device differs in the structure of the exhaust system between the indoor installation type and the outdoor installation type, the manufacturer of the combustion device needs to produce the combustion device according to the indoor installation type and the outdoor installation type, and the user also needs to replace the combustion device with a new combustion device in a case where the combustion device is changed from the indoor installation to the outdoor installation.

[0003] Conventionally, in a combustion device including an exhaust cylinder in a top surface portion, there has been known a technique in which an exterior case with an exhaust window opened in a front surface is installed in a top surface portion of the combustion device so that combustion exhaust is performed only forward (Patent Literature 1).CITATIONS LISTPatent Literature

[0004] Patent Literature 1: JP 05-187721 ASUMMARY OF INVENTIONTechnical Problems

[0005] However, the conventional technique does not convert the combustion device from the indoor installation type to the outdoor installation type. The inventor of the present invention has studied development of a novel exhaust adapter capable of converting an indoor installation type combustion device into an outdoor installation type combustion device. In a case where the exhaust adapter is installed on the top surface portion of the combustion device, in order to improve the design from the front side by giving the exhaust adapter a sense of unity with the combustion device, a fixing means of a front cover disposed on the top surface portion of the combustion device and an upper end portion of the front cover are covered by the exhaust adapter. In this case, in order to remove the front cover for maintenance or the like of the combustion device, it is necessary to temporarily remove the exhaust adapter, which causes a problem of lowering workability for the maintenance or the like.

[0006] The present invention has been made in view of the above circumstances, and an object thereof is to provide an exhaust adapter capable of removing a front cover of a combustion device without removing the exhaust adapter even in the combustion device to which the exhaust adapter is attached.Solutions to Problems

[0007] An exhaust adapter according to the present invention is an exhaust adapter connected to a combustion device including a box-shaped casing including an open portion on a front side, a front cover covering the open portion and removably fixed to the casing, and an exhaust cylinder protruding upward from a top surface of the casing, the exhaust adapter has a configuration to include:

[0008] a box-shaped main body including a side wall and an upper wall and having an open lower side;

[0009] an exhaust outlet that opens in the side wall of the main body and discharges combustion exhaust gas;

[0010] an exhaust coupling portion provided in the main body and connected to the exhaust cylinder;

[0011] an exhaust flow path portion provided in the main body and connecting the exhaust coupling portion to the exhaust outlet;

[0012] a cutout portion provided at a front side wall of the side wall of the main body where the front cover is located, the cutout portion being provided over a predetermined height and a predetermined width from a lower end; and

[0013] a front lid that openably and closably covers the cutout portion.

[0014] With the above configuration, by retracting the front lid and opening the cutout portion, it is possible to prevent the exhaust adapter from interfering when the front cover of the combustion device is removed. Furthermore, even in a case where an upper end portion of the front cover includes a fixing means with the casing, the fixing of the fixing means can be released through the cutout portion. Therefore, the front cover of the combustion device can be removed from the casing in a state where the front cover is attached to the combustion device without removing the exhaust adapter. Therefore, even in the combustion device to which the exhaust adapter is attached, the work of removing the front cover can be performed without trouble.

[0015] In the exhaust adapter,

[0016] the front lid may be configured to be fixed to the main body by a hinge to be openable and closable with respect to the cutout portion.

[0017] With this configuration, the front cover of the combustion device can be removed by bringing the front cover into an open state without completely removing the front cover from the exhaust adapter. Therefore, workability at the time of removing the front cover can be improved.

[0018] In the exhaust adapter,

[0019] the hinge may be configured to include an engaging portion and an engaged portion that hold the front lid at a position in an open state.

[0020] With this configuration, since the front lid is held in the open state by the hinge, it is not necessary for an operator to hold the front lid in the open state, and thus, workability at the time of removing the front cover can be further improved.

[0021] In the exhaust adapter,

[0022] a fastening portion that fixes the main body to the combustion device may be configured to be provided in the main body.

[0023] With this configuration, since the fastening portion is concealed in the main body, the appearance of the combustion device to which the exhaust adapter is attached can be improved. Furthermore, when the exhaust adapter is attached to the combustion device, it is possible to perform fastening work of the fastening portion from a front surface side of the combustion device through the cutout portion by opening the front lid, and workability at the time of attaching the exhaust adapter is improved.BRIEF DESCRIPTION OF DRAWINGS

[0024] FIG. 1 is a front view illustrating a combustion device according to the present embodiment.

[0025] FIG. 2 is a schematic diagram illustrating an internal configuration of the combustion device in the present embodiment.

[0026] FIG. 3 is a perspective view illustrating the combustion device in a case where a front lid of an exhaust adapter of the present embodiment is in an open state.

[0027] FIG. 4 is a front view illustrating the combustion device in a case where the front lid of the exhaust adapter of the present embodiment is in the open state.

[0028] FIG. 5 is a perspective view illustrating a state when the exhaust adapter of the present embodiment is installed on a top surface portion of the combustion device.

[0029] FIG. 6 is a perspective view (FIG. 6A) illustrating a case where the front lid is in a closed state and a perspective view (FIG. 6B) illustrating a case where the front lid is in an open state in the exhaust adapter of the present embodiment.

[0030] FIG. 7 is a cross-sectional view illustrating the exhaust adapter of the present embodiment.

[0031] FIG. 8 is a perspective view illustrating the exhaust adapter of the present embodiment from a bottom surface side.

[0032] FIG. 9 is an enlarged partial cross-sectional view of a portion of a hinge to which the front lid is attached.

[0033] FIG. 10 is a cross-sectional view (FIG. 10A) illustrating a positional relationship of an engaging portion of the hinge when the front lid is in the closed state and a cross-sectional view (FIG. 10B) illustrating the positional relationship of the engaging portion of the hinge when the front lid is in the open state.DESCRIPTION OF EMBODIMENTS

[0034] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

[0035] A combustion device 30 illustrated in FIGS. 1 to 4 constitutes a hot water supply device according to an example of the present invention. The combustion device includes a box-shaped casing 32 including an open portion 31 on the front side, and a front cover 34 that covers the open portion 31 and is removably fixed to the casing 32. The casing 32 and the front cover 34 constitute a device main body serving as an outer shell of the device. Note that, in the present specification, as illustrated in FIG. 3, a side of the front cover 34 of the combustion device 30 is defined as a front surface, and a front-rear, left-right, and up-down positional relationship is defined.

[0036] As illustrated in FIG. 2, a combustion unit 35, a heat exchange unit 36, an air blowing means 37, an air supply unit 38, and an exhaust unit 39 are disposed in the casing 32. The exhaust unit 39 includes a cylindrical exhaust cylinder 40 in an exhaust downstream portion. The air supply unit 38 includes in an air supply upstream portion a cylindrical air supply cylinder 41 and a ring-shaped air supply cylinder 42 in which the exhaust cylinder 40 is disposed in an inner peripheral portion. The exhaust cylinder 40, the air supply cylinder 41, and the ring-shaped air supply cylinder 42 are disposed so as to protrude upward from a top surface portion 33 (that is also a top surface portion of the combustion device 30) of the casing 32. The air blowing means 37 mixes air introduced from the air supply unit 38 into the combustion device 30 with fuel gas supplied from a fuel supply pipe 43, and supplies the mixed gas to the combustion unit 35. The combustion unit 35 generates combustion exhaust gas by burning the mixed gas by a burner (not illustrated) provided in the combustion unit 35. The heat exchange unit 36 heats fluid (water) flowing from a water supply pipe 44 into a heat transfer pipe (not illustrated) by the combustion exhaust gas sent from the combustion unit 35. The fluid heated by the heat exchange unit 36 flows out from the heat transfer pipe to a hot water outlet pipe 45 and is supplied to a hot water supply terminal. The combustion exhaust gas after the fluid is heated by the heat exchange unit 36 is discharged from the exhaust unit 39 to the outside of the instrument.

[0037] The front cover 34 includes a rectangular front surface portion matching the open portion 31 of the casing 32, and has a shallow bottom box shape in which a peripheral wall portion extending rearward is formed on an outer peripheral edge of the front surface portion. The front cover 34 is fixed at a vertical position with respect to the open portion 31 of the casing 32. Specifically, as illustrated in FIGS. 3, 4, and 5, the top surface portion 33 of the casing 32 is provided with latch locks 46 at the left and right positions on the front side, and the peripheral wall portion of the upper portion of the front cover 34 is provided with hooks 47 that hook the latch locks 46 at the left and right positions on the upper surface. An attachment portion 48 (See FIG. 2) including a screw hole is provided in a lower portion of the open portion 31 of the casing 32, and a fixing piece 49 including a through hole through which a screw 49a passes is provided in a peripheral wall portion of a lower portion of the front cover 34. As a result, the front cover 34 is disposed in the open portion 31 of the casing 32, the latch locks 46 of the top surface portion 33 of the casing 32 is engaged with the hooks 47 in the upper portion of the front cover 34, and the attachment portion 48 in the lower portion of the casing 32 and the fixing piece 49 in the lower portion of the front cover 34 are fixed with the screw 49a, whereby the front cover 34 is removably fixed to the open portion 31 of the casing 32. Note that the fixing means of the upper portion of the front cover 34 may be another fixing means such as screw fastening in addition to the latch locks 46.

[0038] In the present embodiment, an exhaust adapter 1 connected to the exhaust cylinder 40 is installed on the top surface portion 33 of the combustion device 30. The combustion device 30 in which the exhaust adapter 1 is not installed in the top surface portion 33 can be applied to an indoor installation type combustion device 30, and the combustion device in which the exhaust adapter 1 is installed in the top surface portion 33 can be applied to an outdoor installation type combustion device 30. That is, by installing the exhaust adapter 1 in the top surface portion 33 in the combustion device 30 of an indoor installation type, it is possible to convert the combustion device into the combustion device 30 of an outdoor installation type. By the way, in a case where the exhaust adapter is installed to cover the entire top surface portion 33 of the combustion device 30, the fixing means (46 and 47) in the upper portion of the front cover 34 and the upper end portion of the front cover 34 are covered with the exhaust adapter. In this case, it is necessary to temporarily remove the exhaust adapter in order to remove the front cover 34 for maintenance or the like of the combustion device 30. However, in the present embodiment, even in a case where the exhaust adapter 1 is installed to form the outdoor installation type combustion device 30, the exhaust adapter 1 is configured such that the front cover 34 of the combustion device 30 can be removed without removing the exhaust adapter 1.

[0039] Hereinafter, the exhaust adapter 1 of the present embodiment will be described. As illustrated in FIGS. 5, 6, 7, and 8, the exhaust adapter 1 of the present embodiment includes a main body 2 as an external component and an exhaust flow guide body 3 as an internal component provided in the main body 2. The exhaust flow guide body 3 includes an exhaust coupling portion 4 and an exhaust flow path portion 5.

[0040] The main body 2 includes a side wall 6 and an upper wall 7, and is formed in a box shape with a lower side opened. The upper wall 7 of the main body 2 has a rectangular shape, and a front portion is an inclined surface higher than a rear portion. The side wall 6 of the main body 2 extends downward from a peripheral edge portion of the upper wall 7. An openable front lid 8 is attached to the side wall 6 on the front side. The front lid 8 has a shape bulging forward and is formed with dimensions to be flush with the front cover 34 of the combustion device 30 in the closed state. The side wall 6 on the rear side is formed with dimensions to be flush with a back surface of the casing 32 of the combustion device 30. Lower ends of the front lid 8 and the side wall 6 on the rear side are formed with dimensions to substantially match the upper end of the front cover 34 and the upper end of the back surface of the casing 32. The side walls 6 on the left and right sides each have a bulging shape in which a lower portion from the vicinity of a vertically intermediate portion to the lower end bulges outward, and are formed with dimensions to be flush with the left and right surfaces of the casing 32 of the combustion device 30. The side walls 6 on the left and right sides are formed to have dimensions that extend to positions where lower ends of the side walls 6 on the left and right sides are covered with rounded corners between the left and right surfaces and the top surface of the casing 32. As described above, in the state where the exhaust adapter 1 is installed in the top surface portion 33 of the combustion device 30, the main body 2 of the external component covers the top surface portion 33 of the combustion device 30 and is flush with the front and rear surfaces and the left and right surfaces of the device main body of the combustion device 30, so that the exhaust adapter 1 has a sense of unity with the combustion device 30, and the designability from the front is improved. Note that the main body 2 of the exhaust adapter 1 may be slightly larger or smaller in size than the top surface portion 33 of the combustion device 30, or may extend to a position where the lower end portion of the main body 2 slightly covers the upper portion of the combustion device 30. Note that, in the present embodiment, the main body 2, the exhaust flow guide body 3, and the front lid 8 are formed of a resin material.

[0041] Air supply ports 9 opened horizontally in the front-rear direction are provided in lower portions of the side walls 6 on the left and right sides of the main body 2. In the vicinity of the side walls 6 on the left and right sides in the main body 2, there are provided guide plates 10 (See FIG. 8) facing the air supply ports 9 and extending in parallel with the side walls 6. The air flowing into the main body 2 from the outside through the air supply ports 9 by the guide plates 10 flows downward and is guided to the air supply cylinder 41 and the ring-shaped air supply cylinder 42 in the top surface portion 33 of the combustion device 30. An upper portion of the side wall 6 on the front side from the upper end to the vicinity of the intermediate portion is an inclined surface facing obliquely upward. The inclined surface is provided with an exhaust outlet 11 that opens horizontally long in the left-right direction. The exhaust flow path portion 5 is connected to the exhaust outlet 11 so as to communicate with the exhaust outlet in the main body 2. On an inner surface of the front side side wall 6 forming the exhaust outlet 11, plate-shaped insertion protrusions 12 protruding into the main body 2 are provided at an upper portion and a lower portion of the exhaust outlet 11. The upper and lower insertion protrusions 12 are disposed in the exhaust flow path portion 5, and can form a space in which the combustion exhaust gas is accumulated in a peripheral edge portion of the exhaust outlet 11 to prevent the temperature of the side wall 6 around the exhaust outlet 11 from lowering. Furthermore, on the inner surface of the side wall 6 on the front side, receiving plate portions 60 whose outer end portions are curved upward are provided at right and left positions below the lower insertion protrusion 12. The left and right receiving plate portions 60 are provided along the outer periphery of the corner portion of a flange 14 of the exhaust flow path portion 5 disposed on the inner surface of the side wall 6 on the front side.

[0042] As illustrated in FIG. 7, the exhaust flow guide body 3 includes the exhaust coupling portion 4 connected to the exhaust cylinder 40 of the combustion device 30 and the exhaust flow path portion 5 connecting the exhaust coupling portion 4 to the exhaust outlet 11 of the main body 2. The exhaust coupling portion 4 and the exhaust flow path portion 5 are integrated, and the respective internal spaces communicate with each other.

[0043] The exhaust coupling portion 4 is formed in a cylindrical shape so as to follow the inner peripheral shape of the exhaust cylinder 40 of the combustion device 30. An upper end portion of the exhaust coupling portion 4 is joined to the exhaust flow path portion 5. A lower portion of the exhaust coupling portion 4 is inserted into the exhaust cylinder 40 of the combustion device 30 via a cylindrical packing (not illustrated) and is connected to communicate with the exhaust cylinder 40.

[0044] The exhaust flow path portion 5 includes an internal space through which the combustion exhaust gas of the combustion device 30 flows, and is formed in a flat box shape having an opening 13 opened horizontally at the front end. The exhaust coupling portion 4 is joined to a central portion of the bottom surface of the exhaust flow path portion 5 so as to communicate with the internal space. The outward flange 14 is formed on an outer peripheral edge of the opening 13 of the exhaust flow path portion 5. The flange 14 of the exhaust flow path portion 5 is provided with an annular packing 15 and is pressed against and connected to the side wall 6 on the front side in the main body 2 at the outer peripheral portion of the exhaust outlet 11. As a result, the opening 13 of the exhaust flow path portion 5 communicates with the exhaust outlet 11 of the main body 2, and the combustion exhaust gas of the combustion device 30 is discharged from the exhaust cylinder 40 to the outside from the exhaust outlet 11 through the exhaust coupling portion 4 and the exhaust flow path portion 5.

[0045] A bulging portion 16 that bulges outward in a substantially U shape is formed at a rear portion of the exhaust flow path portion 5, and a fixing portion 17 that is fixed to the main body 2 with screws is provided at an intermediate portion in a left-right width direction on an outer surface of the bulging portion 16. A rear portion of the inner surface of the upper wall 7 of the main body 2 is provided with a sliding guide portion 18 that is brought into pressure contact with the outer surface of the bulging portion 16 of the exhaust flow path portion 5, and a fixed base 19 that is screwed to the fixing portion 17 of the exhaust flow path portion 5. A total of four sliding guide portions 18 are provided at two locations corresponding to positions of the left and right end portions of the bulging portion 16 and two left and right locations corresponding to the central position. The fixed base 19 includes a screw hole and is provided at one location corresponding to an intermediate portion of the bulging portion 16. The exhaust flow path portion 5 is attached to the main body 2 by fixing the fixing portion 17 to the fixed base 19 with screws in a state where the bulging portion 16 is pressed against the sliding guide portion 18. The front portion of the sliding guide portion 18 is formed with a concave arcuate portion 18a inclined forward from the distal end side toward the proximal end side. An outer surface of the bulging portion 16 of the exhaust flow path portion 5 is formed in a convex arcuate surface 16a. As a result, the convex arcuate surface 16a of the bulging portion 16 is pushed into the concave arcuate portion 18a of the sliding guide portion 18 from the distal end side to the proximal end side, whereby the exhaust flow path portion 5 is pressed forward by the sliding guide portion 18, and the packing 15 disposed between the flange 14 of the exhaust flow path portion 5 and the side wall 6 on the front side in the main body 2 is held in a highly compressed state. Therefore, high airtightness by the packing 15 is secured between the opening 13 of the exhaust flow path portion 5 and the exhaust outlet 11 of the main body 2, and the main body 2 is sealed so that the combustion exhaust gas and the dew condensation water in the exhaust flow path portion 5 do not leak from the opening 13 into the main body 2.

[0046] In the present embodiment, in the main body 2, the side wall 6 on the front side is provided with a cutout portion 20 cut out over the entire left and right widths at a predetermined height from the lower end to the vicinity of the intermediate portion.

[0047] The front lid 8 covering the cutout portion 20 is attached to the side wall 6 on the front side. The front lid 8 is fixed to the main body 2 so as to be openable and closable with respect to the cutout portion 20 by a hinge 21. The hinges 21 are provided at left and right positions on the upper end portion of the cutout portion 20 and the upper portion of the front lid 8, and allows the front lid 8 to be turned upward to an open state. By opening the front lid 8, the cutout portion 20 is opened.

[0048] As illustrated in FIGS. 9 and 10, the hinge 21 includes a columnar hinge shaft 23 provided between two arms 22 protruding forward from the upper end portion of the cutout portion 20, and two hinge clamping plates 24 protruding from the upper inner surface of the front lid 8 and sandwiching the hinge shaft 23. The hinge shaft 23 is provided with a rib-shaped protrusion 25 (engaging portion), and the hinge clamping plate 24 is provided with a recess 26 (engaged portion) into which the protrusion 25 is fitted. In a position where the front lid 8 is in the closed state, the protrusion 25 of the hinge shaft 23 and the recess 26 of the hinge clamping plate 24 are formed in a positional relationship of not engaging with each other (See FIG. 10A). When the front lid 8 is turned upward to the open state, the protrusion 25 of the hinge shaft 23 and the recess 26 of the hinge clamping plate 24 are engaged with each other, and the front lid 8 is held at the position in the open state (See FIG. 10B). Note that, in the present embodiment, the hinge 21 is provided on the upper portion of the front lid 8.

[0049] However, the hinge 21 may be provided on the side end portion of the right end portion or the left end portion of the front lid 8, and the front lid 8 may be opened rightward or leftward. Alternatively, the front lid 8 may be divided into left and right portions, and the hinge 21 may be provided on the left and right side end portions of the front lid 8, and the front lid 8 may be hinged double doors.

[0050] Left and right side end portions of the front lid 8 are bent along the side walls 6 on the left and right sides of the main body 2, and engagement pieces 27 (See FIG. 9) are provided at rear end portions of the bent portions. Engaging protrusions 28 (See FIG. 9) that engage with the engagement pieces 27 of the front lid 8 are provided on the inner surfaces of the front edge portions in the side walls 6 on the left and right sides. In a position where the front lid 8 is in the closed state, the engagement piece 27 of the front lid 8 and the engaging protrusion 28 of the side walls 6 on the left and right sides are engaged with each other, and the front lid 8 is held at the position in the closed state so as not to be easily opened. Note that, in the present embodiment, the holding means at the closed state position of the front lid 8 is an engagement means by the engagement piece 27 and the engaging protrusion 28 described above, but may be other holding means such as a magnetic attraction means.

[0051] With the above configuration, according to the exhaust adapter 1 of the present embodiment, at the time of maintenance or the like of the combustion device 30, the front lid 8 is opened and retracted to open the cutout portion 20, so that the exhaust adapter 1 can be prevented from interfering when the front cover 34 of the combustion device 30 is removed (See FIG. 3). Therefore, the front cover 34 of the combustion device 30 can be removed from the casing 32 while the exhaust adapter 1 is attached to the combustion device 30 without being removed. Therefore, even in the combustion device 30 to which the exhaust adapter 1 is attached, the work of removing the front cover 34 can be performed without trouble. Furthermore, since the front lid 8 is fixed to the main body 2 so as to be openable and closable with respect to the cutout portion 20 by the hinge 21, the front cover 34 of the combustion device 30 can be removed by bringing the front lid 8 into the open state without completely removing the front lid 8 from the main body 2 of the exhaust adapter 1. Therefore, workability at the time of removing the front cover 34 can be improved. Moreover, since the hinge 21 is provided with the engaging portion 25 and the portion to be engaged portion 26 (See FIG. 10) that hold the front lid 8 at the position in the open state, by holding the front lid 8 in the open state by the engagement of the engaging portion 25 of the hinge 21 and the portion to be engaged portion 26, it is not necessary for an operator to hold the front lid 8 in the open state, and thus workability at the time of removing the front cover 34 can be further improved.

[0052] Furthermore, in the main body 2 of the exhaust adapter 1, a fixing plate portion 51(See FIGS. 4, 5, 7, etc.) serving as a fastening portion for attaching the exhaust adapter 1 to the top surface portion 33 of the combustion device 30 is provided. The fixing plate portion 51 is provided on the inner surfaces of the side walls 6 on the left and right sides, and is provided with a through hole through which the screw 51a passes. The left and right fixing plate portions 51 are disposed such that a through hole of the screw 51a faces the cutout portion 20 on the front side. L-shaped fixing components 52 (See FIG. 5) including screw holes of the screws 51a are attached to left and right end portions of the top surface portion 33 of the combustion device 30. The left and right fixing components 52 are disposed such that screw holes face 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 components 52 of the combustion device 30 with the screws 51a.

[0053] As illustrated in FIG. 5, when the exhaust adapter 1 is attached to the top surface portion 33 of the combustion device 30, the L-shaped fixing component 52 is attached to the top surface portion 33 of the combustion device 30 by screw fastening or the like. Then, the exhaust coupling portion 4 of the exhaust adapter 1 is inserted into the exhaust cylinder 40 of the combustion device 30, and the exhaust adapter 1 is disposed on the top surface portion 33 of the combustion device 30. In the exhaust adapter 1 disposed on the top surface portion 33 of the combustion device 30, by opening the front lid 8, the fixing plate portion 51 in the main body 2 of the exhaust adapter 1 and the fixing component 52 of the top surface portion 33 of the combustion device 30 are fixed by the screw 51a from the front surface side of the combustion device 30 through the cutout portion 20 of the exhaust adapter 1. As a result, the exhaust adapter 1 is mounted on the top surface portion 33 of the combustion device 30.

[0054] The fixing plate portion 51 of the exhaust adapter 1 and the fixing component 52 of the combustion device 30 are concealed in the main body 2 of the exhaust adapter 1 by closing the front lid 8 of the exhaust adapter 1. By providing the fixing plate portion 51 as a fastening portion in the main body 2 of the exhaust adapter 1 in this manner, it is possible to improve the appearance of the combustion device 30 to which the exhaust adapter 1 is attached. Furthermore, when the exhaust adapter 1 is attached to the combustion device 30, the work of screw-fastening the fixing plate portion 51 and the fixing component 52 in the main body 2 can be performed from the front surface side of the combustion device 30 through the cutout portion 20 by holding the front lid 8 in the open state. Therefore, since the work of mounting the exhaust adapter 1 can be performed from the front surface side of the combustion device 30, workability of mounting the exhaust adapter 1 to the combustion device 30 can be improved as compared with the case of working from a side of the top surface portion 33 of the combustion device 30.

[0055] Note that the present invention is not limited to the above embodiment, and any modification can be made within the scope of claims.

[0056] For example, the front lid 8 of the exhaust adapter 1 may be configured to be completely removable from the main body 2 of the exhaust adapter 1. Furthermore, in the present embodiment, the air supply cylinder 41 and the ring-shaped air supply cylinder 42 are provided on the top surface portion 33 of the combustion device 30, and the air flowing 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.

[0057] However, one of the air supply cylinder 41 and the ring-shaped air supply cylinder 42 may be closed, and the air may be supplied into the combustion device 30 only from the other, or only one of the air supply cylinder 41 and the ring-shaped air supply cylinder 42 may be provided on the top surface portion 33 of the combustion device 30.

[0058] Furthermore, the front lid 8 can be detachable from the main body 2, and can be replaced with a front lid having another design. In this way, even if the design of the front cover of the combustion device 30 is changed, it is possible to maintain the sense of unity of the design by replacing the front lid with the same.Industrial Applicability

[0059] The exhaust adapter of the present invention can be used for an exhaust adapter connected to a combustion device such as a hot water supply device. The exhaust adapter can be applied to an outdoor installation type hot water supply device installed on a top surface of an indoor installation type hot water supply device, for example.

[0060] According to the present invention, there is provided an exhaust adapter capable of removing a front cover of a hot water supply device without removing the exhaust adapter from the hot water supply device while enhancing design from the front by providing a sense of unity with the hot water supply device.REFERENCE SIGNS LIST1 . . . exhaust adapter; 2 . . . main body; 3 . . . exhaust flow guide body; 4 . . . exhaust coupling portion; 5 . . . exhaust flow path portion; 6 . . . side wall; 7 . . . upper wall; 8 . . . front lid; 9 . . . air supply port; 10 . . . guide plate; 11 . . . exhaust outlet; 12 . . . insertion protrusion; 13 . . . opening; 14 . . . flange; 15 . . . packing; 16 . . . bulging portion; 16a . . . convex arcuate surface; 17 . . . fixing portion; 18 . . . sliding guide portion; 18a . . . concave arcuate portion; 19 . . . fixed base; 20 . . . cutout portion; 21 . . . hinge; 22 . . . arm; 23 . . . hinge shaft; 24 . . . hinge clamping plate; 25 . . . protrusion; 26 . . . recess; 27 . . . engagement piece; 28 . . . engaging protrusion; 30 . . . combustion device; 31 . . . open portion; 32 . . . casing; 33 . . . top surface portion; 34 . . . front cover; 35 . . . combustion unit; 36 . . . heat exchange unit; 37 . . . air blowing means; 38 . . . air supply unit; 39 . . . exhaust unit; 40 . . . exhaust cylinder; 41 . . . air supply cylinder; 42 . . . ring-shaped air supply cylinder; 43 . . . fuel supply pipe; 44 . . . water supply pipe; 45 . . . hot water outlet pipe; 46 . . . latch lock; 47 . . . hook; 48 . . . attachment portion; 49 . . . fixing piece; 51 . . . fixing plate portion; 52 . . . fixing component

Claims

1. An exhaust adapter connected to a combustion device including a box-shaped casing including an open portion on a front side, a front cover covering the open portion and removably fixed to the casing, and an exhaust cylinder protruding upward from a top surface of the casing, the exhaust adapter comprising:a box-shaped main body including a side wall and an upper wall and having an open lower side;an exhaust outlet that opens in the side wall of the main body and discharges combustion exhaust gas;an exhaust coupling portion provided in the main body and connected to the exhaust cylinder;an exhaust flow path portion provided in the main body and connecting the exhaust coupling portion to the exhaust outlet;a cutout portion provided at a front side wall of the side wall of the main body where the front cover is located, the cutout portion being provided over a predetermined height and a predetermined width from a lower end; anda front lid that openably and closably covers the cutout portion.

2. The exhaust adapter according to claim 1, whereinthe front lid is fixed to the main body by a hinge to be openable and closable with respect to the cutout portion.

3. The exhaust adapter according to claim 2, whereinthe hinge includes an engaging portion and an engaged portion that hold the front lid at a position in an open state.

4. The exhaust adapter according to claim 1, whereina fastening portion that fixes the main body to the combustion device is provided in the main body.

5. The exhaust adapter according to claim 2, whereina fastening portion that fixes the main body to the combustion device is provided in the main body.

6. The exhaust adapter according to claim 3, whereina fastening portion that fixes the main body to the combustion device is provided in the main body.

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