Efficient and energy-saving uncovering type dish washing machine

Abstract

The utility model discloses an efficient energy-saving uncovering type dish-washing machine, which relates to the technical field of dish-washing machines, and comprises a machine case and a machine cover, the machine cover is positioned on the upper surface of the machine case, the inner wall of the upper part of the machine case is fixedly connected with a partition plate, and the upper surface of the partition plate is fixedly provided with a first conveying pipe and a second conveying pipe; according to the rinsing water tank, when too much water is collected in the main washing water tank, redundant water overflows and is discharged through the second overflow mechanism and then enters the heat recovery water tank through the first water drainage pipe to be collected, and therefore when water needs to be supplemented to the rinsing water tank, the water in the main washing water tank is discharged through the second overflow mechanism; when the rinsing water tank is used, external water is firstly heated and preheated through the heat recovery coil pipe, namely, heat of waste water discharged by the main rinsing water tank is used for heating, and the waste water can also be cooled, so that the electric quantity needing to be consumed by the first electric heating pipe in the rinsing water tank is reduced, the electricity consumption is further reduced, and the rinsing water tank is more energy-saving and environment-friendly.

Description

Technical Field

[0001] The utility model relates to the technical field of dishwashers, in particular to a high-efficiency and energy-saving lid-type dishwasher. Background Art

[0002] A dishwasher is a device used to automatically clean bowls, chopsticks, plates, dishes, knives, forks and other tableware. According to its structure, it can be divided into two categories: box type and conveyor type. The cover-type dishwasher belongs to the box type structure.

[0003] A commercial lid-type dishwasher is disclosed in a Chinese patent document with announcement number CN217310197U, which states that "it comprises a frame and a cover, wherein a cleaning chamber, a cleaning assembly and a rinsing assembly are arranged in the frame, wherein a mounting position for placing tableware or a dishwashing basket is arranged on the cleaning chamber, wherein the cleaning assembly comprises a spray arm assembly, and wherein the spray arm assembly is used for spraying and cleaning toward the mounting position". The device has the advantages of beautiful appearance, reasonable design, firm structure, good sealing, low energy consumption, easy use and high efficiency.

[0004] However, the following defects or problems still exist in the prior art: the existing lid-type dishwasher lacks a wastewater recovery device, and the wastewater after use is directly discharged during operation, and the water consumption and power consumption are relatively high, and the purpose of saving water and electricity cannot be achieved. Utility Model Content

[0005] The utility model aims to solve the shortcomings in the prior art and proposes a highly efficient and energy-saving lid-type dishwasher.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A high-efficiency and energy-saving lid-type dishwasher comprises a chassis and a cover, wherein the cover is located on the upper surface of the chassis, a partition is fixedly connected to the inner wall of the upper part of the chassis, a first delivery pipe and a second delivery pipe are fixedly installed on the upper surface of the partition, an output end of the first delivery pipe is fixedly connected to a main wash spray arm, an output end of the second delivery pipe is fixedly connected to a rinse spray arm, an opening is formed on the outer wall of the partition, a filter is arranged at the opening of the partition, a heat recovery water tank, a main wash water tank, and a rinse water tank are fixedly installed inside the chassis, a first overflow mechanism and a heat recovery coil are fixedly installed inside the heat recovery water tank, and the output end of the first overflow mechanism is fixedly connected to the main wash spray arm. A second drain pipe is connected, the main wash water tank is located directly below the filter, the main wash water tank is connected to the upper surface of the partition, a second overflow mechanism is fixedly installed inside the main wash water tank, the output end of the second overflow mechanism is fixedly connected to the first drain pipe, the other end of the first drain pipe is connected to the heat recovery water tank, a main water pump is fixedly installed inside the chassis, the input end of the main water pump is connected to the main wash water tank through a pipeline, the output end of the main water pump is connected to the input end of the first delivery pipe, the input end of the rinse water tank is connected to the output end of the heat recovery coil, and the output end of the rinse water tank is connected to the input end of the second delivery pipe.

[0008] Preferably, the first conveying pipe and the second conveying pipe are both U-shaped, the first conveying pipe and the second conveying pipe are both made of hard metal material, the main wash spray arm and the rinse spray arm are two groups, and the two groups of main wash spray arms and rinse spray arms are respectively located at the top and bottom of the first conveying pipe and the second conveying pipe.

[0009] Preferably, a leg is fixedly connected to the bottom outer wall of the chassis, a bowl frame is fixedly mounted on the upper surface of the partition, and a control box is fixedly mounted inside the chassis.

[0010] Preferably, a mounting plate is fixedly installed on the inner wall of the chassis, and a first auxiliary water pump and a second auxiliary water pump are fixedly installed on the outer wall of the mounting plate. The output end of the first auxiliary water pump is connected to the main wash water tank through a pipe, and the output end of the second auxiliary water pump is connected to the rinse water tank through a pipe.

[0011] Preferably, a second electric heating tube is fixedly installed inside the main wash water tank, and a first electric heating tube is fixedly installed inside the rinse water tank.

[0012] Preferably, a filter box is fixedly installed inside the main wash water tank, and the filter box is located at the connection between the main wash water tank and the main water pump.

[0013] Preferably, the first overflow mechanism includes an overflow pipe, which is fixedly installed inside the heat recovery water tank, and an overflow hole is opened on the top of the overflow pipe. The bottom output end of the heat recovery water tank is connected to the second drain pipe, and the second drain pipe is located outside the heat recovery water tank.

[0014] Preferably, a protective sleeve is sleeved on the outside of the overflow pipe, a gap exists between the protective sleeve and the overflow pipe, a fixing seat is fixedly sleeved on the bottom outer wall of the protective sleeve, and the fixing seat is fixedly connected to the inner wall of the heat recovery water tank.

[0015] Preferably, the main wash water tank is located obliquely above the heat recovery water tank, and the first overflow mechanism and the second overflow mechanism have the same structure.

[0016] The beneficial effects of the utility model are:

[0017] 1. In the utility model, the main wash spray arm sprays and washes the tableware, and the water after spraying is filtered through a filter net and then collected through a main wash water tank, so that the water after spraying and washing can be recycled and reused conveniently; the rinse spray arm sprays and rinses the tableware, and the water after spraying and rinsing is filtered through a filter net and then collected through a main wash water tank, so that the water after spraying and rinsing can be recycled and reused conveniently, and the circulating water has a certain temperature, which can reduce the use of the second electric heating tube, thereby reducing water consumption and power consumption, thereby achieving the purpose of saving water and electricity.

[0018] 2. In the utility model, through the design of the heat recovery water tank and the heat recovery coil, when too much water is collected in the main wash water tank, the excess water overflows and is discharged through the second overflow mechanism, and then enters the heat recovery water tank through the first drain pipe for collection. Since the water in the main wash water tank has a certain temperature, when the rinse water tank needs to be replenished with water, the outside water will first be preheated by the heat recovery coil, that is, the waste water discharged from the main wash water tank is heated by the heat, and the waste water can also be cooled, thereby reducing the power consumption of the first electric heating tube in the rinse water tank, further reducing power consumption, and being more energy-saving and environmentally friendly. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The utility model is a structural schematic diagram of a high-efficiency and energy-saving lid-type dishwasher.

[0020] Figure 2 The utility model is a schematic structural diagram of a first delivery pipe, a second delivery pipe, a main wash spray arm and a rinse spray arm of a high-efficiency and energy-saving lid-type dishwasher.

[0021] Figure 3 The utility model is a schematic diagram of the structure of a heat recovery water tank, a main wash water tank and a rinse water tank of a high-efficiency and energy-saving lid-type dishwasher.

[0022] Figure 4 The utility model is a front view of a main washing water tank and a rinsing water tank of a high-efficiency and energy-saving lid-type dishwasher.

[0023] Figure 5 The utility model is a side view of a heat recovery water tank, a main wash water tank and a heat recovery coil of a high-efficiency and energy-saving lid-type dishwasher.

[0024] Figure 6 The utility model is a schematic diagram of the structure of a heat recovery water tank of a high-efficiency and energy-saving lid-type dishwasher.

[0025] Figure 7 The utility model is a schematic diagram of the structure of a heat recovery coil of a high-efficiency and energy-saving lid-type dishwasher.

[0026] Figure 8 The utility model is a schematic structural diagram of a first overflow mechanism of a high-efficiency and energy-saving lid-type dishwasher.

[0027] Fig. 9 The utility model is a schematic diagram of the structure of an overflow pipe of a high-efficiency and energy-saving lid-type dishwasher.

[0028] Numbers in the figure: 1. chassis; 2. cover; 3. support leg; 4. partition; 5. first delivery pipe; 6. second delivery pipe; 7. main wash spray arm; 8. rinse spray arm; 9. filter screen; 10. first overflow mechanism; 101. overflow pipe; 102. overflow hole; 103. fixing seat; 104. protective cover; 11. heat recovery water tank; 12. main wash water tank; 13. rinse water tank; 14. first auxiliary water pump; 15. second auxiliary water pump; 16. mounting plate; 17. main water pump; 18. first electric heating tube; 19. second electric heating tube; 20. second overflow mechanism; 21. heat recovery coil; 22. first drain pipe; 23. filter box; 24. second drain pipe; 25. bowl frame; 26. control box. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0030] As attached Figure 1 To Attachment Figure 5 As shown:

[0031] A highly efficient and energy-saving lid-type dishwasher comprises a cabinet 1 and a cover 2. The cover 2 is located on the upper surface of the cabinet 1. A partition 4 is fixedly connected to the upper inner wall of the cabinet 1. A first delivery pipe 5 and a second delivery pipe 6 are fixedly installed on the upper surface of the partition 4. A main wash spray arm 7 is fixedly connected to the output end of the first delivery pipe 5. A rinse spray arm 8 is fixedly connected to the output end of the second delivery pipe 6.

[0032] It is worth mentioning that the chassis 1, the cover 2, the first delivery pipe 5, the second delivery pipe 6, the main wash spray arm 7, and the rinse spray arm 8 are mature technologies in this field and have been fully disclosed, so they are not repeated in the specification. Their working principles are the same as those of CN217310197U and are not repeated here;

[0033] The outer wall of the partition 4 is provided with an opening, and a filter screen 9 is arranged at the opening of the partition 4. A heat recovery water tank 11, a main wash water tank 12, and a rinse water tank 13 are fixedly installed inside the chassis 1. A first overflow mechanism 10 and a heat recovery coil 21 are fixedly installed inside the heat recovery water tank 11. A second drain pipe 24 is fixedly connected to the output end of the first overflow mechanism 10. The main wash water tank 12 is located directly below the filter screen 9. The main wash water tank 12 is connected to the upper surface of the partition 4. The main wash water tank 12 is fixedly installed inside the second overflow mechanism 10. The output end of the second overflow mechanism 20 is fixedly connected to the first drain pipe 22, the other end of the first drain pipe 22 is connected to the heat recovery water tank 11, and a main water pump 17 is fixedly installed inside the chassis 1, the input end of the main water pump 17 is connected to the main wash water tank 12 through a pipeline, the output end of the main water pump 17 is connected to the input end of the first delivery pipe 5, the input end of the rinse water tank 13 is connected to the output end of the heat recovery coil 21, and the output end of the rinse water tank 13 is connected to the input end of the second delivery pipe 6.

[0034] In the above technical solution, when working, the dishes to be washed are placed on the upper surface of the bowl frame 25, and then the cover 2 is closed, and the main water pump 17 is started. The main water pump 17 pumps the water in the main wash water tank 12 out through the first delivery pipe 5 and the main wash spray arm 7. The main wash spray arm 7 sprays and washes the dishes. The sprayed water is filtered through the filter screen 9 and then collected through the main wash water tank 12, so that the water after spraying and washing can be recycled and reused conveniently.

[0035] After cleaning, the tableware is rinsed through the rinsing spray arm 8, and the water in the rinsing water tank 13 enters the rinsing spray arm 8 through the second delivery pipe 6 and is discharged. The rinsing spray arm 8 sprays and rinses the tableware, and the water after spraying and rinsing is filtered through the filter net 9 and then collected through the main washing water tank 12, so as to facilitate the recycling and reuse of the water after spraying and rinsing.

[0036] As attached Figure 2As shown, the first delivery pipe 5 and the second delivery pipe 6 are both U-shaped, and the first delivery pipe 5 and the second delivery pipe 6 are both made of hard metal material. The main wash spray arm 7 and the rinse spray arm 8 are both in two groups, and the two groups of main wash spray arms 7 and rinse spray arms 8 are located at the top and bottom of the first delivery pipe 5 and the second delivery pipe 6 respectively.

[0037] In the above technical solution, the first delivery pipe 5 and the second delivery pipe 6 not only play the role of conveying liquid, but also are used to support the main wash spray arm 7 and the rinse spray arm 8.

[0038] The bottom outer wall of the chassis 1 is fixedly connected with a support leg 3 , the upper surface of the partition 4 is fixedly mounted with a bowl frame 25 , and the interior of the chassis 1 is fixedly mounted with a control box 26 .

[0039] In the above technical solution, the bowl frame 25 is used to place the bowl, and the control box 26 is used to install the controller [not shown in the figure]. The controller can adopt a conventional product in the prior art. The control box 26 controller is electrically connected to each electrical component.

[0040] As attached Figure 3 As shown, a mounting plate 16 is fixedly installed on the inner wall of the chassis 1, and a first auxiliary water pump 14 and a second auxiliary water pump 15 are fixedly installed on the outer wall of the mounting plate 16. The output end of the first auxiliary water pump 14 is connected to the main wash water tank 12 through a pipe, and the output end of the second auxiliary water pump 15 is connected to the rinse water tank 13 through a pipe.

[0041] In the above technical scheme, the input end of the second auxiliary water pump 15 is connected to an external drying agent through a pipeline, and the drying agent enters the rinsing water tank 13 through the second auxiliary water pump 15; the input end of the first auxiliary water pump 14 is connected to an external detergent through a pipeline, and the detergent enters the main wash water tank 12 through the first auxiliary water pump 14.

[0042] As attached Figure 4 As shown, a second electric heating tube 19 is fixedly installed inside the main wash water tank 12 , and a first electric heating tube 18 is fixedly installed inside the rinse water tank 13 .

[0043] In the above technical solution, the water in the rinse water tank 13 is heated by the first electric heating tube 18 in the rinse water tank 13, and the water in the main wash water tank 12 is heated by the second electric heating tube 19 in the main wash water tank 12;

[0044] It is worth mentioning that temperature sensors [not shown in the figure] are installed in the main wash water tank 12 and the rinse water tank 13. The temperature sensors belong to the prior art. When the heating reaches the set temperature, the first electric heating tube 18 and the second electric heating tube 19 are automatically disconnected. The technology is mature in this field and has been fully disclosed, so it will not be repeated in the specification.

[0045] As attached Figure 5As shown, a filter box 23 is fixedly installed inside the main wash water tank 12 , and the filter box 23 is located at the connection between the main wash water tank 12 and the main water pump 17 .

[0046] In the above technical solution, through the design of the filter box 23, the filter box 23 performs secondary filtration on the water in the main wash water tank 12.

[0047] As attached Figure 1 To Attachment Fig. 9 As shown, the first overflow mechanism 10 includes an overflow pipe 101, which is fixedly installed inside the heat recovery water tank 11. An overflow hole 102 is opened on the top of the overflow pipe 101. The bottom output end of the heat recovery water tank 11 is connected to the second drain pipe 24. The second drain pipe 24 is located outside the heat recovery water tank 11. A protective sleeve 104 is sleeved on the outside of the overflow pipe 101. There is a gap between the protective sleeve 104 and the overflow pipe 101. A fixing seat 103 is fixedly sleeved on the bottom outer wall of the protective sleeve 104. The fixing seat 103 is fixedly connected to the inner wall of the heat recovery water tank 11. The main wash water tank 12 is located obliquely above the heat recovery water tank 11. The first overflow mechanism 10 and the second overflow mechanism 20 have the same structure.

[0048] In the above technical solution, when too much water is collected in the main wash water tank 12, the excess water overflows and is discharged through the second overflow mechanism 20, and then enters the heat recovery water tank 11 through the first drain pipe 22 for collection. Since the water in the main wash water tank 12 has a certain temperature, when the rinse water tank 13 needs to be replenished with water, the external water will first be preheated by the heat recovery coil 21, that is, the waste water discharged from the main wash water tank 12 is heated by the heat, and the waste water can also be cooled, thereby reducing the amount of electricity consumed by the first electric heating tube 18 in the rinse water tank 13, further reducing electricity consumption, and being more energy-saving and environmentally friendly. At the same time, when there is too much water in the heat recovery water tank 11, the waste water in the heat recovery water tank 11 is discharged into the overflow pipe 101 through the overflow hole 102 at the top of the overflow pipe 101 and then discharged to the outside through the second drain pipe 24.

[0049] The specific usage and function of this embodiment are as follows:

[0050] When the utility model is used, the main wash water tank 12 and the rinse water tank 13 are firstly replenished with water, the top input end of the heat recovery coil 21 is the water inlet end, the external water enters the rinse water tank 13 through the heat recovery coil 21, and then enters the second delivery pipe 6 from the output end of the rinse water tank 13, and then is sprayed out through the rinse spray arm 8, and the sprayed water enters the main wash water tank 12 through the filter screen 9. When the water in the main wash water tank 12 reaches the preset amount, the water replenishment is stopped, thereby completing the water replenishment of the main wash water tank 12 and the rinse water tank 13;

[0051] The water in the rinsing water tank 13 is heated by the first electric heating pipe 18 in the rinsing water tank 13, and the water in the main washing water tank 12 is heated by the first auxiliary water pump 14 in the main washing water tank 12, and the heating is automatically disconnected when the set temperature is reached;

[0052] Then, the input end of the second auxiliary water pump 15 is connected to the drying agent through a pipeline, and the drying agent enters the rinsing water tank 13 through the second auxiliary water pump 15; the input end of the first auxiliary water pump 14 is connected to the detergent through a pipeline, and the detergent enters the main washing water tank 12 through the first auxiliary water pump 14;

[0053] For the above structure and process, please refer to Figure 1-5 .

[0054] During operation, the dishes to be washed are placed on the upper surface of the bowl frame 25, and then the cover 2 is closed and the main water pump 17 is started. The main water pump 17 pumps the water in the main wash water tank 12 out through the first delivery pipe 5 and the main wash spray arm 7. The main wash spray arm 7 sprays and washes the dishes. The sprayed water is filtered through the filter screen 9 and then collected through the main wash water tank 12, so that the sprayed water can be recycled and reused.

[0055] After washing, the tableware is rinsed by the rinsing spray arm 8, and the water in the rinsing water tank 13 enters the rinsing spray arm 8 through the second delivery pipe 6 and is discharged. The rinsing spray arm 8 sprays and rinses the tableware, and the water after spraying and rinsing is filtered through the filter screen 9 and then collected by the main washing water tank 12, so that the water after spraying and rinsing can be recycled and reused conveniently;

[0056] For the above structure and process, please refer to Figure 1-5 .

[0057] When too much water is collected in the main wash water tank 12, the excess water overflows and is discharged through the second overflow mechanism 20, and then enters the heat recovery water tank 11 through the first drain pipe 22 for collection. Since the water in the main wash water tank 12 has a certain temperature, when the rinse water tank 13 needs to be replenished with water, the external water will first be preheated by the heat recovery coil 21, that is, the waste water discharged from the main wash water tank 12 is heated and cooled, thereby reducing the power consumption of the first electric heating tube 18 in the rinse water tank 13, further reducing power consumption, and being more energy-saving and environmentally friendly;

[0058] For the above structure and process, please refer to Figure 1-5 .

[0059] At the same time, when there is too much water in the heat recovery water tank 11, the waste water in the heat recovery water tank 11 is discharged into the overflow pipe 101 through the overflow hole 102 at the top of the overflow pipe 101 and then discharged to the outside through the second drain pipe 24.

[0060] For the above structure and process, please refer to Figure 6-9 .

[0061] The above are only preferred specific implementation methods of the utility model, but the protection scope of the utility model is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the utility model, who makes equivalent replacements or changes based on the technical scheme and utility model concept of the utility model, should be covered by the protection scope of the utility model.

Claims

1. A highly efficient and energy-saving lid-type dishwasher, comprising a cabinet (1) and a cabinet cover (2), wherein the cabinet cover (2) is located on the upper surface of the cabinet (1), a partition (4) is fixedly connected to the upper inner wall of the cabinet (1), a first delivery pipe (5) and a second delivery pipe (6) are fixedly installed on the upper surface of the partition (4), the output end of the first delivery pipe (5) is fixedly connected to a main wash spray arm (7), and the output end of the second delivery pipe (6) is fixedly connected to a rinse spray arm (8), characterized in that: The outer wall of the partition (4) is provided with an opening, and a filter (9) is arranged at the opening of the partition (4); a heat recovery water tank (11), a main wash water tank (12), and a rinse water tank (13) are fixedly installed inside the chassis (1); a first overflow mechanism (10) and a heat recovery coil (21) are fixedly installed inside the heat recovery water tank (11); a second drain pipe (24) is fixedly connected to the output end of the first overflow mechanism (10); the main wash water tank (12) is located directly below the filter (9); the main wash water tank (12) is connected to the upper surface of the partition (4); and a heat recovery coil (21) is fixedly installed inside the heat recovery water tank (11). A second overflow mechanism (20), the output end of the second overflow mechanism (20) is fixedly connected to a first drain pipe (22), the other end of the first drain pipe (22) is connected to a heat recovery water tank (11), a main water pump (17) is fixedly installed inside the chassis (1), the input end of the main water pump (17) is connected to a main wash water tank (12) through a pipeline, the output end of the main water pump (17) is connected to the input end of the first delivery pipe (5), the input end of the rinse water tank (13) is connected to the output end of the heat recovery coil (21), and the output end of the rinse water tank (13) is connected to the input end of the second delivery pipe (6).

2. The energy-efficient lid-type dishwasher according to claim 1, characterized in that: The first delivery pipe (5) and the second delivery pipe (6) are both U-shaped, and are made of hard metal material. The main wash spray arm (7) and the rinse spray arm (8) are both in two groups, and the two groups of the main wash spray arm (7) and the rinse spray arm (8) are respectively located at the top and bottom of the first delivery pipe (5) and the second delivery pipe (6).

3. The high-efficiency and energy-saving lid-type dishwasher according to claim 1, characterized in that: The bottom outer wall of the chassis (1) is fixedly connected with a support leg (3), the upper surface of the partition (4) is fixedly mounted with a bowl frame (25), and the interior of the chassis (1) is fixedly mounted with a control box (26).

4. The energy-efficient lid-type dishwasher according to claim 1, characterized in that: A mounting plate (16) is fixedly mounted on the inner wall of the chassis (1), and a first auxiliary water pump (14) and a second auxiliary water pump (15) are fixedly mounted on the outer wall of the mounting plate (16); the output end of the first auxiliary water pump (14) is connected to the main wash water tank (12) through a pipeline, and the output end of the second auxiliary water pump (15) is connected to the rinse water tank (13) through a pipeline.

5. The energy-efficient lid-type dishwasher according to claim 1, characterized in that: A second electric heating tube (19) is fixedly installed inside the main wash water tank (12), and a first electric heating tube (18) is fixedly installed inside the rinse water tank (13).

6. The high-efficiency and energy-saving hood-type dishwasher according to claim 1, characterized in that: A filter box (23) is fixedly installed inside the main wash water tank (12), and the filter box (23) is located at the connection between the main wash water tank (12) and the main water pump (17).

7. The energy-efficient lid-type dishwasher according to claim 1, characterized in that: The first overflow mechanism (10) comprises an overflow pipe (101), the overflow pipe (101) is fixedly installed inside the heat recovery water tank (11), an overflow hole (102) is provided on the top of the overflow pipe (101), the bottom output end of the heat recovery water tank (11) is connected to a second drain pipe (24), and the second drain pipe (24) is located outside the heat recovery water tank (11).

8. The high-efficiency and energy-saving hood-type dishwasher according to claim 7, characterized in that: The overflow pipe (101) is sleeved with a protective sleeve (104) on its exterior, a gap exists between the protective sleeve (104) and the overflow pipe (101), a fixing seat (103) is fixedly sleeved on the bottom outer wall of the protective sleeve (104), and the fixing seat (103) is fixedly connected to the inner wall of the heat recovery water tank (11).

9. The high-efficiency and energy-saving hood-type dishwasher according to claim 8, characterized in that: The main wash water tank (12) is located obliquely above the heat recovery water tank (11), and the first overflow mechanism (10) and the second overflow mechanism (20) have the same structure.

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