Booster for dishwasher

Abstract

To effectively prevent water from coming into contact with internal components even when an air supply part is provided in a front panel.SOLUTION: A booster 1 for a dishwasher includes: a tank for storing hot water; a gas combustion type heat source unit 3 for heating the hot water stored in the tank; a controller 8 for controlling the heat source unit 3; and a housing 2 for accommodating the tank, the heat source unit 3, and the controller 8, and can supply the hot water from the tank to an external dishwasher. A front panel 15 including an air supply part 19 for supplying combustion air to the heat source unit 3 is detachably installed to a front surface of the housing 2, while a back plate 80 facing a back surface of the air supply part 19 at a predetermined interval is disposed on a back side of the front panel 15.SELECTED DRAWING: Figure 8

Description

[Technical Field]

[0001] The present disclosure relates to a dishwasher booster that is installed to supply hot water to a commercial dishwasher. [Background technology]

[0002] A known commercial dishwashing system includes a dishwasher that washes dishes brought into a washing room 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. This dishwasher booster includes a housing surrounded by plates (panels) on all sides, front, back, left, right, top, and bottom. The front panel of the housing is provided with an electric drive control device (controller), an operating unit electrically connected to the controller, and an air intake unit that takes in combustion air for the burner. [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] Dishwasher boosters are often installed on the kitchen floor of restaurants and other establishments, so when cleaning the kitchen floor, water can seep into the housing through the air intake on the front panel and splash onto important components such as the controller.

[0005] Therefore, the present disclosure aims to provide a booster for a dishwasher that can effectively prevent water from coming into contact with internal components even if an air intake section is provided on the front panel. [Means for solving the problem]

[0006] In order to achieve the above object, the present disclosure provides a water heater comprising: 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 dishwasher booster having a housing that houses the tank, the heat source unit, and the controller, and capable of supplying hot and cold water in the tank to an external dishwasher, a front panel having an air intake section for supplying combustion air to the heat source unit is detachably provided on the front surface of the housing; A back plate is disposed on the rear side of the front panel, facing the rear surface of the air intake section at a predetermined distance. Another aspect of the present disclosure is characterized in that, in the above configuration, the front panel is rectangular when viewed from the front and has a shallow box shape with folded portions that protrude rearward on each of the four sides (top, bottom, left, and right), the lower folded portion overlaps the back plate in the vertical direction when viewed from above, and the lower end of the back plate is located lower than the lower end of the air intake section. Another aspect of the present disclosure is characterized in that, in the above configuration, the folded portion located on the lower side is formed with a drain hole for draining water that has fallen into the folded portion. In another aspect of the present disclosure, in the above configuration, the air intake section includes a front plate attached to the front side of an attachment window provided in the front panel and having an external air intake port, and a rear plate attached to the rear side of the attachment window and having an internal air intake port, One of the external air intake and the internal air intake is covered with a breathable filter, and the other air intake is an upper end opening of a grille section that protrudes rearward as it extends upward. [Effects of the Invention]

[0007] According to the present disclosure, even if water seeps into the back side of the front panel through the air intake section, the water will come into contact with the back plate and fall off. Therefore, even if the air intake section is provided on the front panel, it is possible to effectively prevent water from coming into contact with internal components such as the controller and heat source unit. According to another aspect of the present disclosure, in addition to the above-mentioned effects, the folded portion on the lower side of the front panel overlaps the back plate in a top-down direction in a plan view, and the lower end of the back plate is located below the lower end of the air intake section, so that water received by the back plate falls onto the folded portion, reliably preventing water from seeping inside. Furthermore, water that falls onto the folded portion can be easily drained by removing the front panel. According to another aspect of the present disclosure, in addition to the above effects, the folded portion is formed with a drain hole for draining water that has fallen onto the folded portion, so that water that has fallen onto the folded portion can be drained through the drain hole without removing the front panel. According to another aspect of the present disclosure, in addition to the above effects, the air intake section includes a front panel having an external air intake port and a rear panel having an internal air intake port, one side of one air intake port is covered with a filter and the other air intake port is the upper end opening of the grille section, so that the double structure of the filter and the grille section can more effectively prevent water from entering the rear side of the air intake section. [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. 10 is an exploded perspective view of the air intake section and back plate from the front. [Figure 6] FIG. 10 is an exploded perspective view of the air intake section and back plate from the rear. [Figure 7] FIG. 3 is a partially enlarged cross-sectional view taken along the line BB in FIG. 2. [Figure 8] FIG. 3 is a partially enlarged cross-sectional view taken along the line CC in FIG. 2. [Figure 9] FIG. 2 is a perspective view of the front panel as seen from the rear. 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 exchange unit 21 accommodates a heat exchanger 27 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 predetermined intervals in the left-right direction, and a heat transfer tube 29 that serpentines and penetrates the fins 28, 28... at right angles.

[0012] The exhaust section 22 includes an exhaust box 30 and a connecting pipe 31. The exhaust box 30 is divided into a box body 32 and a cover plate 33. The box body 32 is a rectangular box-shaped structure with an open top, extending in the front-to-rear direction and fixed at its front portion on the upper casing 26 of the heat exchanger 21. A communication port 34 communicating with the upper casing 26 is formed on the front bottom surface of the box body 32. Outward-extending flanges 35, 35... are provided on the four sides of the top opening of the box body 32 (front, rear, left, and right). The cover plate 33 is rectangular in plan view and covers the box body 32, including the flanges 35, from above. It is screwed to the flanges 35 to close the top opening of the box body 32. The connecting pipe 31 is erected on the rear upper surface of the cover plate 33, communicates with the box body 32, and protrudes upward through the top plate 11. An exhaust duct 36 is provided on the top surface of the top plate 11 in the front-to-rear direction. The upper end of the connecting pipe 31 protrudes into the exhaust duct 36 , connecting the exhaust box 30 to the exhaust duct 36 .

[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. 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.

[0016] 5 and 6, the air intake section 19 is attached to a mounting window 55 provided in the lower part of the front panel 15. The mounting window 55 has a rectangular shape extending in the vertical direction when viewed from the front, and a pair of upper and lower locking holes 56, 56 are formed on the left side of the mounting window 55. The air intake section 19 includes a front plate 60 , a mounting frame 61 , and a rear plate 62 . The front panel 60 has a rectangular shape in front view, slightly larger than the mounting window 55. The inner region is formed with multiple external air intake ports 63, 63·, partitioned vertically. An inner frame portion 64, slightly smaller in outer shape than the mounting window 55, is formed around the external air intake ports 63, 63·, on the rear surface of the front panel 60. A filter 65 (e.g., a ventilation mesh) that blocks each external air intake port 63 is incorporated into the inner frame portion 64. The external air intake port 63 is an example of one of the air intake ports of the present disclosure. A gasket 66 is attached around the entire periphery of the outer side of the inner frame portion 64 on the rear surface of the front panel 60. A pair of upper and lower thumb screws 67, 67 is provided on the right edge of the front panel 60, corresponding to the front side of the inner frame portion 64. A pair of upper and lower locking claws 68, 68 that correspond to the locking holes 56, 56 are integrally formed outward on the left edge of the rear surface of the front panel 60.

[0017] The mounting frame 61 has a rectangular shape in front view that is slightly larger than the mounting window 55, and has an opening 70 in the center that is rectangular in front view and slightly smaller than the mounting window 55. Both left and right end edges of the mounting frame 61 are bent rearward and then bent outward to form L-shaped bent portions 71, 71 in a plan view. A pair of upper and lower notches 72, 72 are formed at the end of the left bent portion 71. The notches 72, 72 are located rearward of the locking holes 56, 56 of the front panel 15. A pair of upper and lower screw holes 73, 73 are formed on the right side of the opening 70. The screw holes 73, 73 are located rearward of the thumb screws 67, 67 of the front plate 60. As shown in FIGS. 7 and 8 , the mounting frame 61 is integrally attached to the rear surface of the front panel 15 by, for example, welding.

[0018] The rear panel 62 has a rectangular shape in front view, with a width that fits between the left and right folded portions 71, 71 of the mounting frame 61, and the same vertical length as the mounting frame 61, and has multiple louver sections 75, 75... formed in the vertical direction in the center. Each louver section 75 extends in the horizontal direction and includes an inclined section 76 that protrudes rearward from the bottom end to the top end, and an internal air intake port 77 that opens at the top end of the inclined section 76. The internal air intake port 77 is an example of the other air intake port of the present disclosure. The left and right end edges and the bottom edge of the rear panel 62 are bent forward and then bent outward on the left and right sides and downward to form L-shaped inward bent portions 78, 78.... However, the front-to-rear depth of the inward bent portions 78 is smaller than the front-to-rear depth of the bent portions 71 of the mounting frame 61. The rear panel 62 has each inward bent portion 78 integrally attached to the rear surface of the mounting frame 61 by, for example, welding. In this state, each louver portion 75 is located rearward of the opening 70 of the mounting frame 61 and faces the opening 70. The front plate 60 is attached to the front panel 15 by inserting and engaging the locking claws 68, 68 into the locking holes 56, 56 from the front of the front panel 15, and screwing the thumb screws 67, 67 into the screw holes 73, 73 of the mounting frame 61. In this state, the inner frame portion 64 and gasket 66 of the front plate 60 are positioned inside the mounting window 55. The gasket 66 abuts against the inner peripheral edge of the mounting window 55 and the front surface of the mounting frame 61, sealing the gap between the front plate 60 and the mounting frame 61. Each external air intake port 63 faces the mounting window 55 from the front.

[0019] A back plate 80 is attached to the rear surface of the front panel 15. The back plate 80 has a flat plate portion 81 that is rectangular in front view and slightly larger than the mounting frame 61. Outer folded portions 82, 82 that are folded forward and then outward on the left and right sides are formed on both left and right edge portions of the flat plate portion 81. The front-to-rear depth of the outer folded portions 82 is greater than the front-to-rear depth of the folded portion 71 of the mounting frame 61. In the outwardly bent portion 82 on the left side of the back panel 80, notches 83, 83 are formed by cutting out from the left edge at positions corresponding to the locking holes 56, 56 of the front panel 15. Each notch 83 extends beyond the outwardly bent portion 82 and into the flat plate portion 81. At the end of each notch 83 in the flat plate portion 81, a cut-out piece 84 is formed that is bent forward and then bent outward to the left and right. Each cut-out piece 84 is formed inward of the outwardly bent portion 82 and has a depth that fits within the outwardly bent portion 82. A receiving rubber 85 is provided on the front surface of each cut-and-raised piece 84. The receiving rubber 85 is a hollow block body that has a square shape when viewed from the front and is open on the front surface.

[0020] The back plate 80 has its flat plate portion 81 positioned behind the mounting frame 61 and rear plate 62, and its left and right outer folded portions 82, 82 are integrally attached to the rear surface of the front panel 15, for example by welding. In this state, the rear ends of the left and right folded portions 71, 71 of the mounting frame 61 abut against the front surface of the flat plate portion 81, causing the receiving rubbers 85, 85 to protrude into the notches 72, 72. 7 and 8, in the installed state, the back plate 80 is located behind the air intake section 19 with a predetermined distance S in the front-to-rear direction from the rear ends of the inclined portions 76 of each louver section 75 of the rear plate 62, which is the rear end of the air intake section 19. At this time, the lower end of the back plate 80 is located below the external air intake port 63 at the lowest position and the louver section 75 at the lowest position. Furthermore, when the back plate 80 is attached, the receiving rubbers 85 have openings positioned behind the locking holes 56 of the front panel 15, blocking the locking holes 56. Therefore, even if the locking claws 68 of the front plate 60 lock into the locking holes 56 on the back side of the front panel 15, the locking holes 56 are sealed.

[0021] The front panel 15 has a rectangular shape extending vertically when viewed from the front. As shown in FIG. 9 , the top, bottom, left, and right sides of the front panel 15 are formed with folded portions 90, 90... that are folded backward and then further folded inward. Thus, the front panel 15 has a shallow box shape that opens to the rear. Drain holes 91, 91 are formed on the left and right sides of the lower folded portion 90 (hereinafter referred to as "90A" when distinguishing between them). An outer gasket 92 is attached to the rear surface of each folded portion 90 along its entire length. The back panel 80 is located directly above the lower folded portion 90A and overlaps the folded portion 90A in a plan view. A screw fastening piece 93 (FIG. 3) that protrudes forward and then rises upward and is L-shaped in side view is formed on the front horizontal frame 14. A pair of screw fastening portions 94, 94 that protrude forward are formed on the left and right sides of the front surface of the bottom plate 10. The front surfaces of the screw fastening piece 93 and the screw fastening portions 94, 94 are located on the same plane as the plane defined by the up-down and left-right directions. With the air intake unit 19 attached to the lower side of the front panel 15, the upper folded portion 90 is engaged from above with the screw fastening piece 93. Then, the upper part of the front panel 15 is screwed to the screw fastening piece 93 from the front, and the lower part is screwed to the screw fastening pieces 94, 94 from the front. Then, the outer gaskets 92 provided on each folded portion 90 are pressed against the front surfaces of the front horizontal frame 14, bottom plate 10, and left and right side panels 17, 17 that face each folded portion 90, sealing the gap between the front panel 15 and the front panel 15.

[0022] 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.

[0023] 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, enters the exhaust duct 36 via the connecting pipe 31, and is discharged from the exhaust duct 36 to the outside.

[0024] When cleaning the kitchen, splashed water may splash onto the front panel 60 of the air intake section 19. In this case, the water splashes onto the filter 65 of the outside air intake port 63, preventing the water from entering to some extent. Even if the water is allowed to pass through the filter 65, the force of the water can be suppressed. Furthermore, even if water that has passed through the filter 65 enters the rear side of the front panel 15, the water will come into contact with the front surface of the rear panel 62 and flow down. In particular, since each louver section 75 is formed with an upwardly inclined section 76, most of the water is guided downward before climbing over the inclined section 76 and passing through the internal air intake port 77, and falls onto the folded-back section 90A of the front panel 15. Furthermore, even if water enters the rear side of the rear panel 62 through the internal air intake port 77 of the louver section 75, the water will come into contact with the flat panel section 81 of the back panel 80 and flow downward as shown by the dotted arrow a in Figure 8, onto the folded-over section 90A. Therefore, the water will not reach the rear controller 8. Water that accumulates in the folded-over section 90A is drained to the outside through the drain holes 91, 91. In addition, since a cover 52 is attached to the front side of the controller 8, even if water reaches the rear side of the back plate 80 through the cutout 83 in the back plate 80, the water is caught by the cover 52 and does not reach the inside of the case 50.

[0025] In this way, the booster 1 of the above form has a tank 4 for storing hot water, a gas-fired heat source unit 3 for heating the hot water stored in the tank 4, a controller 8 for controlling the heat source unit 3, and a housing 2 for accommodating the tank 4, the heat source unit 3, and the controller 8, and is capable of supplying the hot water in the tank 4 to an external dishwasher. A front panel 15 equipped with an air intake section 19 for supplying combustion air to the heat source unit 3 is detachably provided on the front surface of the housing 2, and a back plate 80 is arranged on the back side of the front panel 15, facing the rear surface of the air intake section 19 at a predetermined distance. With this configuration, even if water seeps into the back side of front panel 15 through air intake section 19, the water will come into contact with back plate 80 and fall off. Therefore, even if air intake section 19 is provided on front panel 15, it is possible to effectively prevent water from coming into contact with internal components such as controller 8 and heat source unit 3.

[0026] The front panel 15 is rectangular when viewed from the front and has a shallow box shape with folded portions 90 formed on each of the four sides (top, bottom, left, and right) that protrude rearward. The lower folded portion 90A overlaps the back plate 80 in the vertical direction when viewed from above, and the lower end of the back plate 80 is located lower than the lower end of the louver portion 75 at the lowest position. Therefore, water received by back panel 80 falls onto folded-over portion 90A, reliably preventing water from seeping inside. In addition, water that falls onto folded-over portion 90A can be easily drained by removing front panel 15. The folded portion 90A is formed with a drain hole 91 for draining water that has fallen into the folded portion 90A. Therefore, water that has fallen onto the folded portion 90A can be drained through the drain hole 91 without removing the front panel 15. The air intake section 19 comprises a front plate 60 attached to the front side of a mounting window 55 provided in the front panel 15 and having an external air intake port 63, and a rear plate 62 attached to the rear side of the mounting window 55 and having an internal air intake port 77, the external air intake port 63 being covered with a breathable filter 65, and the internal air intake port 77 being the upper end opening of a grille section 75 that protrudes rearward as it extends upward. Therefore, the double structure of the filter 65 and the louver portion 75 can more effectively prevent water from entering the rear side of the air intake portion 19.

[0027] Modifications of the present disclosure will be described below. The back panel is not limited to the above configuration. For example, the left and right outer bent portions may be welded to the rear panel instead of the front panel, or may be screwed to the front panel or the rear panel. The outer bent portions may not be L-shaped, but may be only bent forward. The lower end of the back plate may be extended further downward than in the above embodiment. If sealing performance can be ensured, the support rubber may be omitted. The back plate is not limited to being attached to the front panel. For example, a mounting plate that is installed between the vertical frames in the same manner as the operation unit may be provided behind the air supply unit, and the back plate may be attached to the mounting plate, or a portion equivalent to the back plate may be formed on the mounting plate. The air intake section is not limited to the above configuration. For example, the number of thumb screws and locking claws on the front panel may be changed, the thumb screws and locking claws may be reversed, or the front panel may be attached using only thumb screws or screws. The external air intake port may be a louver instead of a filter. The mounting frame can be changed in shape and can even be omitted depending on the mounting configuration of the front panel. The rear panel may be attached directly to the front panel instead of using a mounting frame. A filter may be provided instead of a louver. Either the front panel or the rear panel may be omitted. Also, both panels and the mounting frame may be omitted, and the front panel itself may be provided with a louver and a filter to form the air intake section. The air intake section is not limited to a vertically long rectangular shape, but may also be a horizontally long rectangular shape, or may be other shapes such as a circle or an oval shape. There may be multiple air intake sections. In this case, the back plate may be a single piece large enough to cover the multiple air intake sections from the rear, or multiple back plates may be provided for each air intake section.

[0028] The controller cover may be omitted. The number and position of drain holes in the front panel can be changed as needed. Drain holes can also be omitted. Therefore, the front panel does not have to be shallow box-shaped. The number and position of the screws used to attach the front panel can also be changed as needed. 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, 15· Front panel, 18· Operation section, 19· Air intake section, 20· Combustion section, 21· Heat exchange section, 22· Exhaust section, 30· Exhaust box, 44· Internal supply piping, 45· Internal return piping, 46· Circulation pump, 50· Case, 51· Electrical board, 55· Mounting window, 60· Front panel, 61· Mounting frame, 62· Rear panel, 63· External air intake port, 77· Internal air intake port, 80· Back panel, 90· Fold-back section, 91· Drain hole.

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 dishwasher booster having a housing that houses the tank, the heat source unit, and the controller, and capable of supplying hot and cold water in the tank to an external dishwasher, a front panel having an air intake section for supplying combustion air to the heat source unit is detachably provided on the front surface of the housing; A booster for a dishwasher, characterized in that a back plate is arranged on the back side of the front panel, facing the rear surface of the air intake section at a predetermined distance.

2. The dishwasher booster according to claim 1, characterized in that the front panel is rectangular when viewed from the front and has a shallow box shape with folded portions that protrude rearward on each of the four sides (top, bottom, left, and right), the lower folded portion overlaps the back plate in the vertical direction when viewed from above, and the lower end of the back plate is located lower than the lower end of the air intake section.

3. 3. The dishwasher booster according to claim 2, wherein the folded portion located on the lower side is formed with a drain hole for draining water that falls into the folded portion.

4. the air intake section includes a front plate attached to the front side of an attachment window provided in the front panel and having an external air intake port, and a rear plate attached to the rear side of the attachment window and having an internal air intake port, A booster for a dishwasher as described in any one of claims 1 to 3, characterized in that either the external air intake or the internal air intake is covered with a breathable filter, and the other air intake is an upper end opening of a grille portion that protrudes rearward as it extends upward.

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