Method of connecting exhaust portion in booster for dishwasher and recombination set of booster for dishwasher and exhaust portion

Abstract

To connect a booster for a dishwasher to an exhaust part even when the position and shape of an exhaust duct are different at the time of installing the booster.SOLUTION: Exhaust portion 22 includes exhaust box 30 attached to upper casing 26 of heat exchange portion 21 and connection cylinder 31 protruding from exhaust box 30, a plurality of exhaust boxes 30 different from one another in position of connection cylinder 31 are prepared in advance, exhaust box 30 having connection cylinder 31 connectable to exhaust duct 70 is selected and attached to upper casing 26, and connection cylinder 31 of selected exhaust box 30 is connected to exhaust duct 70.SELECTED DRAWING: Figure 8

Description

[Technical Field]

[0001] The present disclosure relates to a dishwasher booster installed to supply high-temperature hot water to a commercial dishwasher, a method for connecting an exhaust section to an external exhaust duct, and a combination set of the dishwasher booster and the exhaust section. [Background technology]

[0002] A known commercial dishwashing system includes a dishwasher that washes dishes brought into a washing chamber and a dishwasher booster that is installed alongside the dishwasher and supplies hot water for rinsing to the dishwasher. As disclosed in Patent Document 1, for example, the dishwasher booster includes a combustion chamber with a burner, a heat exchanger that heats water by exchanging combustion heat from the burner, and a hot water storage tank that stores the heated hot water. The hot water in the hot water storage tank can be supplied to the dishwasher via an external hot water supply pipe. In this dishwasher booster, a horizontal exhaust duct is connected to an exhaust pipe extending upward from the main body, and a vertical exhaust duct attached to the kitchen wall is connected to the end of the horizontal exhaust duct, allowing the combustion exhaust after heat exchange to be discharged to the outside. In particular, a connecting support member is provided on the exhaust pipe that connects and supports the horizontal exhaust duct so that it can be moved in the front-to-rear direction of the main body, allowing the connection position of the horizontal exhaust duct relative to the exhaust pipe to be adjusted in the front-to-rear direction. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2001-299662 Summary of the Invention [Problem to be solved by the invention]

[0004] The connecting support member of the above-mentioned conventional dishwasher booster only allows adjustment of the relative position between the exhaust pipe and the exhaust duct in the front-to-rear direction, and can only accommodate one type of exhaust duct with a specified shape and dimensions. Because the dishwasher booster's installation position is generally fixed, it becomes impossible to connect the exhaust pipe and the exhaust duct if adjustment is required in the left-to-right direction or if the position or shape of the exhaust duct is different.

[0005] Therefore, the present disclosure aims to provide a method for connecting an exhaust part in a dishwasher booster that allows the exhaust part to be connected even when the position or shape of the exhaust duct is different when installing the dishwasher booster, and a reassembly set for a dishwasher booster and an exhaust part. [Means for solving the problem]

[0006] In order to achieve the above object, a first configuration of the present disclosure includes a tank for storing hot and cold water; a gas combustion type heat source unit that heats the hot water stored in the tank; a controller for controlling the heat source unit; a housing that houses the tank, the heat source unit, and the controller and to which an external exhaust duct can be attached, and the hot and cold water in the tank can be supplied to an external dishwasher; In a dishwasher booster, the heat source unit includes, in order from the bottom, a fan, a combustion section equipped with a burner, a heat exchange section for exchanging heat between the combustion exhaust of the burner and hot and cold water from the tank, and an exhaust section for discharging the combustion exhaust, the method for connecting the exhaust section to the exhaust duct comprises: The exhaust unit includes an exhaust box attached to a casing of the heat exchange unit and a connecting tube protruding from the exhaust box, and a plurality of exhaust boxes are prepared in advance, each of which differs from the other in at least one of the position, shape, and protruding direction of the connecting tube, The method is characterized in that one exhaust box having the connecting tube connectable to the exhaust duct is selected and attached to the casing, and the connecting tube of that one exhaust box is connected to the exhaust duct. Another aspect of the first configuration is the above configuration, wherein the exhaust box comprises a lower portion attached to the casing and an upper portion detachably attached to the lower portion and having the connecting tube; The method is characterized in that a plurality of upper parts, each differing from the other in at least one of the position, shape, and protruding direction of the connecting tube, are prepared in advance, and one upper part having the connecting tube that can be connected to the exhaust duct is selected and attached to the lower part, and the connecting tube of the one upper part is connected to the exhaust duct. In order to achieve the above object, a second configuration of the present disclosure is a combination set of a booster for a dishwasher and an exhaust unit, A tank for storing hot water, a gas combustion type heat source unit that heats the hot water stored in the tank; a controller for controlling the heat source unit; a housing that houses the tank, the heat source unit, and the controller and to which an external exhaust duct can be attached, and the hot and cold water in the tank can be supplied to an external dishwasher; The heat source unit includes, in order from the bottom, a fan, a combustion unit having a burner, and a heat exchange unit that exchanges heat between the combustion exhaust of the burner and the hot water from the tank. an exhaust unit that is detachably attached to a casing of the heat exchange unit and that discharges combustion exhaust gas, the exhaust unit has an exhaust box detachable from the casing and a connecting tube protruding from the exhaust box, and there are a plurality of exhaust boxes that differ from one another in at least one of the position, shape, and protruding direction of the connecting tube; The method is characterized in that by selecting one exhaust box having the connecting tube that can be connected to the exhaust duct and attaching it to the casing, the connecting tube can be connected to match the exhaust duct. [Effects of the Invention]

[0007] According to the present disclosure, by selecting one exhaust box to match the exhaust duct, the connecting tube can be connected to the exhaust duct. Therefore, even if the position or shape of the exhaust duct differs during installation, the exhaust section can be connected accordingly. According to another aspect of the first configuration, in addition to the above effects, it is necessary to rearrange only the upper part having the connecting tube, and the lower part can be shared between exhaust boxes, which leads to reduced manufacturing and management costs. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a perspective view of a booster for a dishwasher. [Figure 2] FIG. 2 is a front view of the booster for the dishwasher. [Figure 3] This is an oblique view showing the state in which the top plate and the front, rear, left, and right panels are omitted, viewed from above and rear right. [Figure 4] FIG. 3 is a cross-sectional view taken along line AA in FIG. 2. [Figure 5] FIG. 5 is an enlarged view of the exhaust portion of FIG. [Figure 6] FIG. 5 is an enlarged perspective view of an exhaust portion of FIG. 4. [Figure 7] FIG. 6 is a cross-sectional view taken along line BB in FIG. 5. [Figure 8] 1A and 1B are explanatory diagrams showing the rearranged state of the exhaust unit, where (A) shows an exploded perspective view and (B) shows a perspective view after rearrangement. [Figure 9] 1A and 1B are explanatory diagrams showing the state of reassembly with another exhaust unit, where (A) shows an exploded perspective view and (B) shows a perspective view after reassembly. [Figure 10] FIG. 10 is a side view of the upper portion showing the state where the exhaust unit is reassembled so that the connecting tube faces rearward. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. Fig. 1 is a perspective view showing an example of a booster for a dishwasher (hereinafter simply referred to as "booster") 1 according to the present disclosure, Fig. 2 is a front view, Fig. 3 is a perspective view showing the booster from the upper right rear with the top plate and front, rear, left and right panels omitted, and Fig. 4 is a cross-sectional view taken along line AA in Fig. 2. Note that in the booster 1 of this embodiment, the front panel 15 on which an operating unit 18 and an air intake unit 19, which will be described later, are provided will be described as the front face (front surface).

[0010] The booster 1 includes a housing 2, a heat source unit 3, a tank 4, an internal circulation path 5, a gas supply unit 6, a water injection unit 7, and a controller 8. The housing 2 includes a bottom plate 10, a top plate 11, four legs 12, 12···, four vertical frames 13, 13···, four horizontal frames 14, 14···, a front panel 15, a rear panel 16, and left and right side panels 17, 17. The bottom plate 10 is rectangular in plan view, with each of its four sides folded upward. The legs 12 are attached downward to the four corners of the underside of the bottom plate 10, supporting the bottom plate 10 horizontally. The vertical frames 13 are fixed to the folded portions of the bottom plate 10 and stand upright at the four corners of the bottom plate 10. Each horizontal frame 14 is installed between the upper ends of the vertical frames 13, 13 adjacent to each other in the front, rear, left, and right directions. The top plate 11 is attached to the horizontal frames 14, 14··· and closes the top surface of the housing 2. The front panel 15, rear panel 16, and side panels 17, 17 are attached to the front, rear, left, and right sides of the housing 2, which is surrounded by the bottom plate 10, top plate 11, vertical frames 13, and horizontal frames 14, thereby closing off each face. The front panel 15 on the front side is provided with an operating unit 18 on the upper side and an air intake unit 19 on the lower side.

[0011] The heat source unit 3 includes, in order from the bottom, a combustion section 20, a heat exchange section 21, and an exhaust section 22, and is disposed in the housing 2 toward the front left. The combustion section 20 houses a plurality of burners 24, 24,... in the left-right direction within a lower casing 23 to form a combustion chamber inside. A fan 25 that supplies combustion air to the burners 24 is provided on the lower plate of the lower casing 23. The heat exchanger 27 is housed in a cylindrical upper casing 26 whose lower end is connected to the lower casing 23. The heat exchanger 27 includes a plurality of fins 28, 28... arranged side by side at a predetermined interval in the left-right direction, and a heat transfer tube 29 that runs perpendicularly through the fins 28, 28.... The upper casing 26 is an example of a casing for the heat exchanger of the present disclosure.

[0012] The exhaust section 22 includes an exhaust box 30 and a connecting tube 31. The exhaust box 30 is divided into a box body 32 and a cover plate 33. The box body 32 is an example of a lower portion of the present disclosure. The cover plate 33 is an example of an upper portion of the present disclosure. The box body 32 is a rectangular box body in plan view that extends in the front-to-rear direction and has an open top, with its front portion screwed onto the upper casing 26 of the heat exchanger 21. A communication port 34 that communicates with the upper casing 26 is formed in the front bottom surface of the box body 32. Outward-projecting flanges 35, 35... are provided on the four sides of the top opening of the box body 32, front to back, left to right. The cover plate 33 has a rectangular shape in a plan view and covers the box body 32 including the flanges 35 from above, and is screwed to the flanges 35 to close the top opening of the box body 32. The connecting tube 31 is erected upward on the top surface of the cover plate 33 and penetrates the top plate 11 to protrude upward. An exhaust duct 70 to be installed in a kitchen is attached to the upper surface of the tabletop 11. The exhaust duct 70 is a flattened rectangular tube, and includes a vertical duct 71 extending in the vertical direction and a horizontal duct 72 extending horizontally forward from the lower end of the vertical duct 71. The horizontal duct 72 is attached to the upper surface of the tabletop 11 and is connected to the connecting tube 31. Details of this connection will be described later.

[0013] The tank 4 is a box-shaped body that is rectangular in plan view and extends in the front-to-rear direction, and is disposed behind the heat source unit 3 and toward the rear left of the housing 2. Tank fixing plates 40, 40 are provided on the top and bottom of the rear surface of the tank 4. The tank fixing plates 40, 40 are connected to the rear left vertical frame 13, and fix the tank 4 to the vertical frame 13. A heat source fixing plate 41 is attached to the front of the tank 4. An extension portion 23a provided on the lower plate of the lower casing 23 of the heat source unit 3 is fixed to the heat source fixing plate 41, and the heat source unit 3 is connected to the heat source fixing plate 41. On the right side of the tank 4, a water injection pipe 42 is connected between the water injection port provided at the front upper part and the water injection section 7. A discharge pipe 43 for discharging hot water to an external dishwasher (hereinafter simply referred to as a "dishwasher") is connected to the underside of tank 4. Discharge pipe 43 penetrates bottom plate 10, protrudes below bottom plate 10, and is connected to the dishwasher via an external hot water supply pipe (not shown).

[0014] The internal circulation path 5 includes an internal supply pipe 44 and an internal return pipe 45 that connect the tank 4 and the heat transfer pipes 29 of the heat exchanger 27. The internal supply pipe 44 connects an supply port provided at the front lower part of the tank 4 to the inlet end of the heat transfer pipe 29 and is formed from multiple pipe members. A circulation pump 46 supported on the bottom plate 10 is incorporated into the internal supply pipe 44. A water inlet thermistor (not shown) is provided in the internal supply pipe 44. The internal return pipe 45 connects a return port provided at the rear lower part of the tank 4 to the outlet end of the heat transfer pipe 29 and is formed from multiple pipe members. A water outlet thermistor (not shown) is provided in the internal return pipe 45.

[0015] The gas supply unit 6 is disposed on the right side of the heat source unit 3 and forward of the circulation pump 46, and an external gas pipe can be connected to a gas inlet 6a protruding from the bottom plate 10. The gas supply unit 6 is provided with a main solenoid valve that opens and closes the internal gas flow path, a proportional valve, and a gas solenoid valve. The upper part of the gas supply unit 6 is connected to a manifold 47 provided on the front surface of the lower casing 23. Within the manifold 47, a gas distribution path is formed that can supply fuel gas to each burner 24. Water injection unit 7 is located in the front right corner of housing 2, to the right of heat source unit 3, and an external water pipe can be connected to water inlet 7a protruding from bottom plate 10. Water injection unit 7 is provided with a water solenoid valve that opens and closes the internal water flow path. Water injection pipe 42 is connected to the top of water injection unit 7, extends rearward and upward, and is connected to tank 4.

[0016] The controller 8 includes a case 50 and an electrical circuit board 51. The case 50 is disposed on the front side of the heat source unit 3, in front of the fan 25 and below the manifold 47, and has an open front surface. The electrical circuit board 51 is housed within the case 50. A cover 52 is provided on the front side of the controller 8, the upper end of which is fixed to the manifold 47, and which covers the front of the controller 8. The operation unit 18 is attached to a mounting plate 53 that is installed between the left and right front vertical frames 13, 13, and is exposed to the front surface of the front panel 15 through a window provided in the front panel 15. The operation unit 18 is equipped with a power switch, a combustion lamp, and a display unit, and is electrically connected to the electrical board 51.

[0017] When this booster 1 is initially installed in a restaurant kitchen together with a dishwasher, for example, the rinse pump attached to the hot water supply pipe is activated. Then, hot water in the tank 4 is supplied from the discharge pipe 43 through the hot water supply pipe to the washing chamber of the dishwasher and stored in the washing tank at the bottom of the washing chamber. This hot water supply continues until the washing tank is full. When washing dishes, etc. in the dishwasher, a washing pump (not shown) sends hot water from the washing tank to the washing chamber, and the hot water is circulated to wash the dishes, etc. After washing, the rinsing pump is activated and the hot water in the tank 4 is sent from the discharge pipe 43 through the hot water supply piping to the washing chamber, where rinsing is performed.

[0018] The controller 8 monitors the water level in the tank 4, and if the water level is low, opens the water electromagnetic valve of the water injection unit 7 to inject water into the tank 4 through the water injection pipe . On the other hand, when the water level in the tank 4 is high, the controller 8 operates the circulation pump 46 to circulate hot water between the heat exchanger 27 of the heat source unit 3 and the tank 4 via the internal supply piping 44 and the internal return piping 45. If the temperature of the hot water detected by the water inlet thermistor is, for example, below 85°C, the controller 8 opens the main solenoid valve and the gas solenoid valve of the gas supply unit 6 to combust the burner 24 of the heat source unit 3 and rotates the fan 25 to supply combustion air taken into the housing 2 via the air intake unit 19 to the burner 24. Thus, heat is exchanged between the hot water passing through the heat transfer tube 29 and the combustion exhaust of the burner 24. The controller 8 controls the aperture of the proportional valve and the rotation speed of the fan 25 to heat the hot water in the tank 4 until it reaches 85°C. When the temperature of the hot water reaches 85°C, the controller 8 stops the combustion of the burner 24 and the rotation of the fan 25, and also stops the operation of the circulation pump 46. The combustion exhaust from the burner 24 passes through the upper casing 26 of the heat exchange section 21, then flows from below into the box body 32 of the exhaust box 30 of the exhaust section 22 and collides with the cover plate 33. The combustion exhaust then flows rearward within the exhaust box 30, passes through the connecting tube 31, enters the horizontal duct 72 of the exhaust duct 70, and is discharged to the outside through the vertical duct 71.

[0019] Next, the structure and method for connecting the exhaust unit 22 to the exhaust duct 70 will be described. First, as shown in FIGS. 5 to 8, a support plate 60 is attached to the top surface of the top plate 11. The support plate 60 is rectangular in plan view and smaller than the top plate 11. Mounting pieces 61, 61... bent downward from each corner are screwed to the top plate 11, so that the portion of the support plate 60 excluding the mounting pieces 61 is supported at a position spaced upward from the top surface of the top plate 11. Protruding pieces 62, 62 bent horizontally outward are formed on the left and right side edges of the support plate 60. The support plate 60 overlaps with the connecting tube 31 in the vertical direction. Directly above the connecting tube 31, a guide tube 63 is provided on the support plate 60 in the vertical direction, with the upper part of the connecting tube 31 coaxially fitted to it. A gasket 64 is interposed between the top plate 11 and the support plate 60 directly above the connecting tube 31. The connecting tube 31 and the guide tube 63 pass through through holes formed in the top plate 11 and the gasket 64, respectively. The upper part of the connecting tube 31 is fitted onto the lower part of the guide tube 63 below the support plate 60.

[0020] Meanwhile, a long hole 74 extending in the front-rear direction is formed in the bottom plate portion 73 of the horizontal duct 72 at a position closer to the left. The upper end of a guide tube 63 protruding from the support plate 60 passes through the long hole 74 and protrudes into the horizontal duct 72. An annular sealing material 65 that surrounds the long hole 74 in a rectangular shape in a plan view is interposed between the support plate 60 and the bottom plate portion 73. A mounting cover 66 is provided on the upper surface of the horizontal duct 72, straddling the horizontal duct 72 and screwed to the protruding pieces 62, 62 of the support plate 60 on both the left and right sides. With the mounting cover 66 attached, the sealing material 65 is compressed between the support plate 60 and the bottom plate portion 73, sealing the gap between the connecting tube 31 and the long hole 74. In this way, the connecting tube 31 is connected to the horizontal duct 72 via the guide tube 63 of the support plate 60, thereby communicating the exhaust box 30 with the horizontal duct 72.

[0021] Here, when the booster 1 is installed, the position of the connecting tube 31 may be misaligned with the position of the exhaust duct 70. If the position of the connecting tube 31 is misaligned in the front-to-rear direction, this can be adjusted by moving the connecting tube 31 and the guide tube 63 relative to each other within the elongated hole 74 of the horizontal duct 72, but there may be cases where the position is misaligned to the point where it cannot be adjusted within the range of the elongated hole 74. To accommodate such misalignment, two types of exhaust boxes are prepared in advance: an exhaust box 30 in which the connecting tube 31 is positioned to the left as shown in Fig. 8(A), and an exhaust box 30A in which the connecting tube 31 is positioned to the right as shown in Fig. 9(A). That is, the exhaust box 30, the exhaust box 30A, and the booster 1 excluding the exhaust unit 22 form a rearrangement set S for the exhaust unit 22. Accordingly, two types of top plates are also prepared in advance: a top plate 11 in Fig. 8(A) in which the through-hole of the connecting tube 31 is positioned to the left, and a top plate 11A in Fig. 9(A) in which the through-hole of the connecting tube 31 is positioned to the right, and the top plates 11 and 11A are assembled into the rearrangement set S. However, since the box body 32 can be made common, a cover plate 33 for the exhaust box 30 in which the connecting tube 31 is on the left side, and a cover plate 33A for the exhaust box 30A in which the connecting tube 31 is on the right side will be prepared. The support plate 60 can be made common because the mounting position on the top plate can be shifted left and right, but if the through hole does not match the connecting tube 31, a different type with a different through hole position is prepared.

[0022] Therefore, with this reassembly set S, when the horizontal duct 72 is located in the center of the left and right of the top plate 11, as shown in Figure 8 (B), the exhaust box 30 is attached to the upper casing 26, and the top plate 11 with the support plate 60 attached is placed over it, allowing the connecting tube 31 to pass through and be exteriorly fitted to the guide tube 63. 9(B), when the horizontal duct 72 is located to the right of the top plate 11, the exhaust box 30A is attached to the upper casing 26. In this case, however, the common box body 32 remains attached to the upper casing 26, and only the cover plate 33A is attached to the box body 32. Then, the top plate 11A with the attached support plate 60 is placed over it, and the connecting tube 31 is passed through and fitted onto the guide tube 63. In this way, even if there is a positional misalignment between the connecting tube 31 and the horizontal duct 72, they can be connected by selecting and rearranging the exhaust boxes 30, 30A.

[0023] 10, if the exhaust duct 70 does not have a horizontal duct and the vertical duct 71 is located on the rear surface of the housing 2, an exhaust box 30B with a connecting tube 31 protruding backward from the rear surface is also prepared in advance to form the reassembly set S. In this case, the cover plate 33B is a flat plate with no connecting tube on the top surface, and the top plate 11B is also a flat plate with no support plate provided, and these are incorporated into the reassembly set S. Therefore, the exhaust box 30B with the cover plate 33B attached thereto is attached to the upper casing 26, and the rear end of the connecting tube 31 protruding rearward is connected to a connecting hole (not shown) provided in the front face of the vertical duct 71. In this way, even when the connection direction to the exhaust duct 70 is different, connection is possible by selecting and rearranging the exhaust box 30B having the connecting tube 31 with the corresponding protruding direction.

[0024] In this way, in the method of connecting the exhaust section 22 in the booster 1 of the above form, the exhaust section 22 includes an exhaust box 30 attached to the upper casing 26 of the heat exchange section 21 and a connecting tube 31 protruding from the exhaust box 30, and exhaust boxes 30, 30A having different positions for the connecting tube 31 and exhaust box 30B having a different position and protruding direction for the connecting tube 31 are prepared in advance, and the exhaust box 30, 30A, 30B having the connecting tube 31 that can be connected to the exhaust duct 70 is selected and attached to the upper casing 26, and the connecting tube 31 of the selected exhaust box 30, 30A, 30B is connected to the exhaust duct 70. In addition, in the combination set S of the booster 1 and the exhaust section 22, the exhaust section 22 has exhaust boxes 30, 30A, 30B that can be attached and detached to the upper casing 26, and connecting tubes 31 that protrude from the exhaust boxes 30, 30A, 30B, and there are three types of exhaust boxes 30, 30A, 30B that differ from each other in the position and protruding direction of the connecting tube 31. By selecting one exhaust box 30, 30A, 30B that has a connecting tube 31 that can be connected to the exhaust duct 70 and attaching it to the upper casing 26, the connecting tube 31 can be connected to the exhaust duct 70. According to this configuration, by selecting one exhaust box 30, 30A, 30B to match the exhaust duct 70, the connecting tube 31 can be connected to the exhaust duct 70. Therefore, even if the position or shape of the exhaust duct 70 differs when installing the booster 1, connection to the exhaust section 22 is possible.

[0025] The exhaust box 30, 30A consists of a box body 32 attached to the upper casing 26, and a cover plate 33, 33A that can be attached to and detached from the box body 32 and has a connecting tube 31. A plurality of cover plates 33, 33A with different positions of the connecting tube 31 are prepared in advance, and the cover plate 33, 33A having the connecting tube 31 that can be connected to the exhaust duct 70 is selected and attached to the box body 32, and the connecting tube 31 of the selected cover plate 33, 33A is connected to the exhaust duct 70. Therefore, it is only necessary to change the cover plates 33, 33A having the connecting tubes 31, and the box body 32 can be made common between the exhaust boxes 30, 30A, which leads to reductions in manufacturing costs and management costs.

[0026] Modifications of the present disclosure will be described below. 8 and 9 show an example of an exhaust box in which the connecting tubes are positioned differently on the left and right sides, but this is not a limitation and exhaust boxes in which the connecting tubes are positioned closer to the front or in the center may also be prepared. Not limited to exhaust boxes in which only the position of the connecting tube differs, exhaust boxes in which the connecting tubes protrude diagonally backward or sideways and thus differ in their positions and protruding directions may also be prepared. Furthermore, exhaust boxes in which the connecting tubes themselves differ in length or diameter to match the exhaust ducts, or multiple exhaust boxes in which the connecting tubes differ in shape in addition to their positions and protruding directions, such as being rectangular, may also be prepared. In Figure 10, an exhaust box with a different position and protruding direction of the connecting tube may also be prepared. For example, if the exhaust duct is located on the side of the housing, an exhaust box with a connecting tube protruding sideways from the side may be prepared in advance. Furthermore, multiple exhaust boxes may be prepared that differ only in the shape, protruding direction, position and shape, or shape and protruding direction of the connecting tube. That is, in the present disclosure, multiple exhaust boxes that differ in at least one of the position, shape, and protruding direction of the connecting tube may be prepared to match the exhaust duct.

[0027] In the above embodiment, the exhaust box is divided into a box body in the lower portion and a cover plate in the upper portion, but the division is not limited to this. For example, the division position may be lowered so that the upper portion is a shallow box. Alternatively, the exhaust box may not be divided, but rather the box body and cover plate may be integrated, and multiple exhaust boxes may be prepared that differ in at least one of the position, shape, and protruding direction of the connecting tube. The shapes of the top plate and support plate through which the connecting tube passes are not limited to the above. For example, the through hole in the top plate may be an elongated hole. The guide tube of the support plate may be eliminated and the connecting tube may pass through the support plate. The support plate and top plate may also be omitted. The sealing structure may also be modified as appropriate.

[0028] The heat source unit and the tank may be disposed on the right side of the housing instead of the left side, and may be disposed side by side instead of front to back. Therefore, the position of the air supply part can be changed appropriately according to the position of the heat source unit. The shapes of the heat source unit and the tank can also be changed as appropriate. The tank does not have to be rectangular in plan view, but may be square, circular, polygonal, or the like. The structure of the housing can also be modified as appropriate. The housing does not have to be rectangular in plan view, but may be square in plan view. The vertical frames are not limited to being strip-shaped, but may be L-shaped, U-shaped, or cylindrical in plan view. However, some or all of the vertical frames, horizontal frames, top panel, and front, rear, left, and right outer panels may be omitted. Casters may be provided instead of legs. [Explanation of symbols]

[0029] 1··Dishwasher booster, 2··Housing, 3··Heat source unit, 4··Tank, 5··Internal circulation path, 6··Gas supply section, 7··Water injection section, 8··Controller, 20··Combustion section, 21··Heat exchange section, 22··Exhaust section, 30, 30A, 30B··Exhaust box, 31··Connecting tube, 32··Box body, 33, 33A, 33B··Cover plate, 34··Communication port, 44··Internal supply piping, 45··Internal return piping, 46··Circulation pump, 60··Support plate, 70··Exhaust duct, 72··Horizontal duct, 73··Bottom plate, 74··Elongated hole, S··Assembly set.

Claims

1. A tank for storing hot water, a gas combustion type heat source unit that heats the hot water stored in the tank; a controller for controlling the heat source unit; a housing that houses the tank, the heat source unit, and the controller and to which an external exhaust duct can be attached, and the hot and cold water in the tank can be supplied to an external dishwasher; In a dishwasher booster, the heat source unit includes, in order from the bottom, a fan, a combustion section equipped with a burner, a heat exchange section for exchanging heat between the combustion exhaust of the burner and hot and cold water from the tank, and an exhaust section for discharging the combustion exhaust, the method for connecting the exhaust section to the exhaust duct comprises: The exhaust unit includes an exhaust box attached to a casing of the heat exchange unit and a connecting tube protruding from the exhaust box, and a plurality of exhaust boxes are prepared in advance, each of which differs from the other in at least one of the position, shape, and protruding direction of the connecting tube, A method for connecting an exhaust section in a booster for a dishwasher, characterized by selecting one exhaust box having a connecting tube that can be connected to the exhaust duct, attaching it to the casing, and connecting the connecting tube of that one exhaust box to the exhaust duct.

2. the exhaust box comprises a lower portion attached to the casing and an upper portion detachably attached to the lower portion and having the connecting tube; A method for connecting an exhaust section in a dishwasher booster as described in claim 1, characterized in that a plurality of upper parts are prepared in advance, each differing from the other in at least one of the position, shape, and protruding direction of the connecting tube, and one upper part having a connecting tube that can be connected to the exhaust duct is selected and attached to the lower part, and the connecting tube of the one upper part is connected to the exhaust duct.

3. A tank for storing hot water, a gas combustion type heat source unit that heats the hot water stored in the tank; a controller for controlling the heat source unit; a housing that houses the tank, the heat source unit, and the controller and to which an external exhaust duct can be attached, and the hot and cold water in the tank can be supplied to an external dishwasher; The heat source unit includes, in order from the bottom, a fan, a combustion unit having a burner, and a heat exchange unit that exchanges heat between the combustion exhaust of the burner and the hot water from the tank. an exhaust unit that is detachably attached to a casing of the heat exchange unit and that discharges combustion exhaust gas, the exhaust unit has an exhaust box detachable from the casing and a connecting tube protruding from the exhaust box, and there are a plurality of exhaust boxes that differ from one another in at least one of the position, shape, and protruding direction of the connecting tube; A combination set of a booster and an exhaust unit for a dishwasher, in which the connecting tube can be connected to the exhaust duct by selecting one exhaust box having the connecting tube that can be connected to the exhaust duct and attaching it to the casing, enables the connecting tube to be connected to match the exhaust duct.

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