Dishwasher

Abstract

To control a dishwasher more properly.SOLUTION: A dishwasher 40 includes: a washing tank 2 for accommodating objects to be washed; and a detergent tank 16 for storing a detergent for washing objects to be washed, where a detergent injection port 16c for injecting a detergent into the detergent tank 16 is installed inside the washing tank 2. A blocking part 16d capable of blocking the detergent injection port 16c is installed inside the washing tank 2, thereby making it possible to block the detergent tank 16.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to dishwashers. [Background technology]

[0002] There are various types of dishwashers available, including built-in types that are incorporated into system kitchens, tabletop types that can be placed on a table, and freestanding types that can be installed in a location that the user can choose.

[0003] Patent document 1 discloses a dishwasher that has a main body, a washing tank, a dish basket for containing items to be washed, and a door, where the door consists of an upper door that opens upward and a lower door that opens downward, and an automatic detergent dispensing device is provided on the lower door. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] International Publication No. 2014 / 148042 Summary of the Invention [Problem to be solved by the invention]

[0005] The inventors of the present invention have recognized that it is necessary to further improve the convenience of users when refilling an automatic detergent dispenser with detergent, and have arrived at the technology of the present disclosure.

[0006] The present disclosure provides techniques for improving the convenience of dishwashers. [Means for solving the problem]

[0007] The dishwasher of the present disclosure includes a washing tub for accommodating items to be washed, and a detergent tank for storing detergent for washing the items. A detergent inlet for injecting detergent into the detergent tank is provided inside the washing tub. The washing tub has a closing part capable of closing the detergent inlet, thereby sealing the detergent tank. [Effects of the Invention]

[0008] According to the present disclosure, the convenience of a dishwasher can be improved. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is a schematic cross-sectional view of a dishwasher according to a first embodiment, seen from the side; [Figure 2] FIG. 1 is a perspective view of a portion of a detergent tank and its surrounding structure of a dishwasher according to a first embodiment; [Figure 3] FIG. 10 is a diagram showing another example of the configuration of the detergent tank of the dishwasher according to the first embodiment. [Figure 4] FIG. 10 is a diagram showing another example of the configuration of the detergent tank of the dishwasher according to the first embodiment. [Figure 5] FIG. 10 is a diagram showing another example of the configuration of the detergent tank of the dishwasher according to the first embodiment. [Figure 6] FIG. 1 is an exploded perspective view of an upper portion of a detergent tank of a dishwasher according to a first embodiment; [Figure 7] 1 is a perspective view of a closing portion and a detergent inlet provided at an upper portion of a detergent tank of a dishwasher according to a first embodiment, viewed obliquely from below; [Figure 8a] 1 is a cross-sectional view of an upper portion of a detergent tank of a dishwasher according to a first embodiment of the present invention; [Figure 8b] FIG. 1 is a cross-sectional view of an upper portion of a detergent tank of a dishwasher according to a first embodiment, showing a path of air passing through the detergent tank; [Figure 9] 10 is a perspective view of a closing portion and a detergent inlet at the top of the detergent tank of the dishwasher according to the second embodiment, viewed from diagonally below. [Figure 10a] A cross-sectional view of the upper part of the detergent tank of the dishwasher according to the second embodiment. [Figure 10b] FIG. 10 is a cross-sectional view of the upper part of the detergent tank of the dishwasher according to the second embodiment, showing the air passage path. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, embodiments will be described in detail with reference to the drawings. However, unnecessary detailed description may be omitted. For example, detailed description of well-known matters or redundant description of substantially the same configuration may be omitted.

[0011] The accompanying drawings and the following description are provided to enable those skilled in the art to fully understand the present disclosure, and are not intended to limit the subject matter described in the claims.

[0012] (Embodiment 1) Hereinafter, the first embodiment will be described with reference to FIGS.

[0013] [1-1.Configuration] Fig. 1 is a schematic cross-sectional side view of dishwasher 40 of embodiment 1. Fig. 2 is a perspective view of dishwasher 40 of embodiment 1, with a portion of the detergent tank and its surrounding configuration omitted.

[0014] The main body 1 houses components such as a washing tank 2 for washing items such as dishes. The washing tank 2 is provided inside the main body 1 and houses items such as dishes. The door 3 opens and closes an opening 3a on the front of the main body 1.

[0015] The cleaning nozzle 4 is rotatably mounted within the cleaning tank 2, and sprays cleaning water onto the object to be cleaned from multiple nozzles mounted on its surface. A cleaning pump (not shown) sprays the cleaning water from the cleaning nozzle 4. The cleaning pump circulates the cleaning water within the cleaning tank 2 by spraying the cleaning water drawn in from a cleaning pump suction port mounted in the water reservoir at the bottom of the cleaning tank 2 from the cleaning nozzle 4. The motor for rotating the cleaning nozzle 4, the cleaning pump, and other components are controlled by a control unit (not shown).

[0016] The detergent tank 16 stores liquid detergent for washing objects. The detergent tank 16 includes an upper detergent tank portion 16a provided inside the washing tub 2 and a lower detergent tank portion 16b provided outside the washing tub 2 below. Because the heavy detergent tank 16 is provided below the washing tub 2, the stability of the main body 1 can be improved. Furthermore, compared to when the detergent tank 16 is provided on the door 3, the stability of the main body 1 can be improved when opening and closing the door 3. This improves user convenience. Furthermore, because the detergent tank 16 is provided below the washing nozzle 4, a larger number of objects can be accommodated in the washing tub 2. The upper detergent tank portion 16a is located on the bottom surface of the washing tub 2 and is configured along the bottom surface of the washing tub 2 in a flat shape with its horizontal width or depth longer than its vertical height. The top surface of the upper detergent tank portion 16a is configured to be lower toward the center of the washing tub 2 where the washing nozzle 4 is provided. This ensures a maximum detergent capacity while avoiding interference with the washing nozzle 4.

[0017] The detergent tank upper portion 16a is provided with a detergent inlet 16c for injecting liquid detergent into the detergent tank 16, and a blocking portion 16d that can block the detergent inlet 16c. Because the detergent inlet 16c is provided inside the washing tub 2, the liquid detergent can be easily injected into the detergent tank 16. Furthermore, even if the liquid detergent is spilled around the detergent inlet 16c when being injected into the detergent tank 16, no particular problem occurs because the liquid detergent simply spills inside the washing tub 2. This improves user convenience.

[0018] The detergent inlet 16c is provided near the opening 3a for placing the object to be washed inside the washing tank 2. This allows the liquid detergent to be easily poured into the detergent tank 16 without removing the detergent tank 16, thereby improving convenience for the user.

[0019] The detergent tank upper portion 16a is made of a transparent or translucent material, which allows the liquid detergent inside the detergent tank upper portion 16a to be seen, thereby preventing the liquid detergent from overflowing when pouring the liquid detergent into the detergent tank 16.

[0020] A float unit 17 having a float 17a for detecting the liquid detergent level in the detergent tank 16 is provided in the detergent tank lower part 16b. The float 17a includes a magnet and is configured to float on the liquid detergent. A reed switch 18 provided near the side of the detergent tank lower part 16b detects the position of the magnet included in the float 17a. This makes it possible to detect the liquid detergent level inside the detergent tank 16. When the remaining amount of liquid detergent inside the detergent tank 16 falls below a predetermined value, the control unit notifies the user of this and prompts them to refill the liquid detergent.

[0021] At least one of the detergent tank upper part 16a, the detergent tank lower part 16b, and the float unit 17 may be provided detachably. This allows the user to remove and wash these components, improving ease of maintenance.

[0022] The detergent pump 21 dispenses liquid detergent stored inside the detergent tank 16 into the washing tub 2. A detergent inlet 22 for dispensing liquid detergent into the washing tub 2 is provided at the bottom of the washing tub 2. The detergent inlet 22 is provided at a position higher than the liquid level of the washing water during the washing process. This prevents the washing water from flowing back toward the detergent pump 21. If a water reservoir (not shown) for storing the washing water is provided so as to protrude from the bottom of the washing tub 2, the detergent inlet 22 may be provided at a position higher than the water reservoir. The detergent inlet 22 may be provided below the washing nozzle 4 and above the bottom surface of the washing tub 2. This prevents the washing water sprayed from the washing nozzle 4 from directly hitting the detergent inlet 22, thereby preventing the washing water from flowing back toward the detergent pump 21.

[0023] Filter 19a for capturing foreign matter is provided near detergent inlet 16c of detergent tank upper portion 16a. Filter 19b is provided below float unit 17. Filter 19c is provided below detergent tank lower portion 16b. This prevents foreign matter from being sucked into detergent pump 21, which could cause malfunction or damage to detergent pump 21. By providing filter 19c, it is possible to prevent foreign matter from being sucked into detergent pump 21 even if the user removes and washes float unit 17 and then installs float unit 17 without installing filter 19b. The mesh of filter 19a may be coarser than the mesh of filters 19b or 19c.

[0024] FIG. 3 is a diagram showing another example of the configuration of detergent tank 16 of dishwasher 40 of embodiment 1. In dishwasher 40 shown in this figure, detergent tank 16 is composed of only detergent tank upper part 16a provided inside washing tub 2. In this case, the stability of main body 1 can be improved. Also, the stability of main body 1 when door 3 is opened and closed can be improved. Furthermore, a larger number of items to be washed can be accommodated in washing tub 2. Also, liquid detergent can be easily poured into detergent tank 16.

[0025] FIG. 4 is a diagram showing another example of the configuration of detergent tank 16 of dishwasher 40 of embodiment 1. In dishwasher 40 shown in this figure, detergent tank 16 is composed of only detergent tank lower part 16b provided below and outside washing tub 2. In this case, the stability of main body 1 can be improved. Also, the stability of main body 1 when door 3 is opened and closed can be improved. Furthermore, a larger number of items to be washed can be accommodated in washing tub 2. Also, liquid detergent can be easily poured into detergent tank 16.

[0026] FIG. 5 is a diagram showing another example of the configuration of detergent tank 16 of dishwasher 40 of embodiment 1. In dishwasher 40 shown in this figure, detergent tank 16 is also composed of only detergent tank lower part 16b provided below and outside washing tub 2. In this case, the stability of main body 1 can be improved. Also, the stability of main body 1 can be improved when door 3 is opened and closed. Also, a larger number of items to be washed can be accommodated in washing tub 2. In the example shown in this figure, detergent inlet 16c is provided near opening 3a, making it easier to pour liquid detergent into detergent tank 16.

[0027] [1-1-1. Structure of the top of the detergent tank] Fig. 6 is an exploded perspective view of detergent tank upper portion 16a of dishwasher 40 of embodiment 1. Fig. 7 is a perspective view of closing portion 16d and detergent inlet 16c of detergent tank upper portion 16a of dishwasher 40 of embodiment 1, viewed obliquely from below. Fig. 8a is a cross-sectional view of detergent tank upper portion 16a of dishwasher 40 of embodiment 1, cut through first notch 161. Fig. 8b is a diagram showing the air path in the cross-sectional view of detergent tank upper portion 16a of dishwasher 40 of embodiment 1, cut through first notch 161.

[0028] The detergent inlet 16c for injecting liquid detergent into the detergent tank 16 is located lower than the spray hole of the washing nozzle 4 and higher than the liquid level of the washing water stored in the washing tub 2. This prevents the washing water stored in the washing tub 2 from flowing into the detergent tank 16.

[0029] The detergent inlet 16c, which is open upward, has a first notch 161 formed by cutting away part of its edge. The first notch 161 acts as a first air hole 164 for drawing air from the outside of the detergent tank 16 into the inside of the detergent tank upper portion 16a, as shown by the arrow in Figure 8b, when the detergent pump 21 is driven.

[0030] Detergent inlet 16c, which is open at the top, has a fitting opening 166 one step below it, which has an outer diameter slightly larger than that of detergent inlet 16c. Closable closing portion 16d fits into fitting opening 166, thereby closing the opening of detergent inlet 16c.

[0031] The closing part 16d has a protrusion 162 extending in the outer diameter direction. When pouring detergent into the detergent tank, the user can use the protrusion 162 as a knob to attach or detach the closing part 16d, thereby exposing the detergent pouring port 16c.

[0032] Closing portion 16d has a packing 163 therein to seal detergent tank 16. Gasket 163 is provided at least in a position that abuts against the edge of detergent inlet 16c when the opening of detergent inlet 16c is closed by closing portion 16d. When the opening of detergent inlet 16c is closed by closing portion 16d, the above-mentioned first air hole 164 is formed between first notch 161 provided on the edge of detergent inlet 16c and packing 163.

[0033] As an example, closing portion 16d is configured in the shape of a cap with the inside of a cylinder hollowed out and the bottom open. A small gap is provided between the lower end of the outer surface of closing portion 16d that fits into fitting opening 166 and fitting opening 166, and acts as a second air hole 167.

[0034] The blocking portion 16d is configured to cover the first air hole 164. This prevents the first air hole 164 from being blocked by wash water pouring down from above the detergent container during the wash operation. It also prevents the wash water sprayed from the wash nozzle 4 during the wash operation from entering the detergent tank 16 through the first air hole 164.

[0035] With the above configuration, the detergent tank upper portion 16a has a path through which air can pass. As shown in Fig. 8b, the air passage path includes the second air hole 167 and the first air hole 164, and communicates from the outside of the detergent tank 16 to the inside of the detergent tank upper portion 16a. More specifically, the inside and outside of the detergent tank 16 communicate from the first air hole 164 to the end of the closing portion 16d.

[0036] As a result, when the detergent pump 21 is driven, air can be sucked from the outside of the detergent tank 16 into the detergent tank upper portion 16a, and the negative pressure in the detergent tank 16 can be eliminated.

[0037] [1-2. Operation] The operation and function of the dishwasher 40 configured as described above will be described below. The user opens the door 3 and places items to be washed, such as dishes, in the washing tub 2. After setting an operation course using the operation unit (not shown), the user operates the start button (not shown) to start the washing operation. The control unit executes the washing process, rinsing process, and drying process in that order based on the operation course. During the washing process, the control unit controls the detergent pump 21 to automatically dispense the liquid detergent stored in the detergent tank 16 into the washing tub 2. The control unit may also control the amount of liquid detergent dispensed into the washing tub 2 based on the turbidity of the washing water detected by a turbidity sensor (not shown), etc.

[0038] During the washing process, when the liquid detergent stored in the detergent tank 16 is poured into the washing tank 2, the detergent pump 21 operates while sucking air that has passed from the outside of the detergent tank 16 through the second air hole and the first air hole into the inside of the detergent tank 16.

[0039] [1-3. Effects, etc.] As described above, in this embodiment, dishwasher 40 includes washing tub 2 for accommodating items to be washed, and detergent tank 16 for storing detergent for washing the items to be washed. Detergent inlet 16c for injecting detergent into detergent tank 16 is provided inside washing tub 2, and washing tub 2 has closing portion 16d for closing detergent inlet 16c, making it possible to seal detergent tank 16. This improves the stability of main body 1. It also improves the stability of main body 1 when door 3 is opened and closed. It also allows a larger number of items to be washed to be accommodated in washing tub 2. It also allows liquid detergent to be easily poured into detergent tank 16.

[0040] In this embodiment, at least a part of the detergent tank 16 is provided outside the cleaning tank 2. This allows the cleaning tank 2 to accommodate a larger number of objects to be cleaned.

[0041] In this embodiment, at least a portion of the detergent tank 16 is provided below the washing tub 2. This improves the stability of the main body 1. It also improves the stability of the main body 1 when opening and closing the door 3. It also allows a larger number of items to be washed to be accommodated in the washing tub 2. It also makes it easier to pour liquid detergent into the detergent tank 16.

[0042] In this embodiment, at least a portion of the detergent tank 16 is provided inside the washing tub 2. This allows the liquid detergent to be easily poured into the detergent tank 16.

[0043] In this embodiment, a portion of the detergent tank 16 provided inside the washing tub 2 is transparent or translucent. This prevents the liquid detergent from overflowing when the liquid detergent is poured into the detergent tank 16.

[0044] In this embodiment, the detergent inlet 16c is provided near the opening 3a for accommodating the object to be washed in the washing tank 2. This allows the liquid detergent to be easily poured into the detergent tank 16.

[0045] In this embodiment, a washing nozzle 4 is provided for spraying washing water onto the objects to be washed contained in the washing tank 2, and the detergent tank 16 is provided below the washing nozzle 4. This allows a larger number of objects to be washed to be contained in the washing tank 2.

[0046] In this embodiment, a detergent pump 21 is provided for feeding the detergent stored in the detergent tank 16 into the washing tub 2, and a detergent inlet 22 for feeding the detergent stored in the detergent tank 16 into the washing tub 2 by the detergent pump 21 is provided at a position higher than the liquid level of the washing water in the washing tub 2 during the washing process. This makes it possible to prevent the washing water from flowing back toward the detergent pump 21.

[0047] In this embodiment, detergent inlet 16c has a first air hole 164 for communicating between the inside and outside of detergent tank 16, and first air hole 164 is provided at a position higher than the liquid level of the cleaning water in cleaning tub 2 during the cleaning process. This makes it easier to draw air from the outside of detergent tank 16 into detergent tank upper part 16a, preventing negative pressure from building up inside detergent tank 16. It also prevents cleaning water stored in cleaning tub 2 from flowing into detergent tank 16 through first air hole 164.

[0048] In this embodiment, the blocking portion 16d is configured to cover the first air hole 164 and the second air hole 167. This prevents the first air hole 164 and the second air hole 167 from being blocked by wash water pouring down from above the detergent tank 16 during the wash operation. It also prevents the wash water sprayed from the wash nozzle 4 during the wash operation from entering the inside of the detergent tank 16 through the first air hole 164 and the second air hole 167.

[0049] Furthermore, in this embodiment, when the opening of detergent inlet 16c is blocked by blocking portion 16d, first air hole 164 is formed between first notch 161 provided on the edge of detergent inlet 16c and packing 163 of blocking portion 16d. This eliminates the need to provide a separate air hole in the outer surface of detergent tank 16 or in blocking portion 16d, and allows the air hole to be formed using a component with a simple structure.

[0050] (Embodiment 2) In the second embodiment, another form of the blocking portion 16d and the second air hole 167 disclosed in the first embodiment will be illustrated. Note that a description of the same configuration as in the first embodiment will be omitted. Furthermore, the same configuration as in the first embodiment will be described using the same reference numerals as in the first embodiment.

[0051] [2-1. Structure of the top of the detergent tank] Fig. 9 is a perspective view of closing portion 16d and detergent inlet 16c of detergent tank upper portion 16a of dishwasher 40 of embodiment 2, viewed obliquely from below. Fig. 10a is a cross-sectional view of detergent tank upper portion 16a of dishwasher 40 of embodiment 2, taken along the first notch 161 and the second notch 165. Fig. 10b is a diagram showing the air path in the cross-sectional view of detergent tank upper portion 16a of dishwasher 40 of embodiment 2, taken along the first notch 161 and the second notch 165.

[0052] The detergent inlet 16c for injecting liquid detergent into the detergent tank 16 is located lower than the spray hole of the washing nozzle 4 and higher than the liquid level of the washing water stored in the washing tub 2. This prevents the washing water stored in the washing tub 2 from flowing into the detergent tank 16.

[0053] The detergent inlet 16c, which is open upward, has a first notch 161 formed by cutting away part of its edge. The first notch 161 acts as a first air hole 164 for drawing air from the outside of the detergent tank 16 into the inside of the detergent tank upper portion 16a, as shown by the arrow in Figure 8b, when the detergent pump 21 is driven.

[0054] Detergent inlet 16c, which is open at the top, has a fitting opening 166 one step below it, which has an outer diameter slightly larger than that of detergent inlet 16c. Closable closing portion 16d fits into fitting opening 166, thereby closing the opening of detergent inlet 16c.

[0055] The closing portion 16d has a protrusion 162 that extends horizontally in the outer diameter direction. The protrusion 162 is hollowed out and configured in an umbrella shape with an open bottom. When pouring detergent into the detergent tank, the user can use the protrusion 162 as a knob to attach or detach the closing portion 16d, exposing the detergent pouring port 16c. Furthermore, because the bottom of the protrusion 162 is open, the inside of the protrusion 162 is in communication with the outside of the detergent tank 16.

[0056] Closing portion 16d has a packing 163 therein to seal detergent tank 16. Gasket 163 is provided at least in a position that abuts against the edge of detergent inlet 16c when the opening of detergent inlet 16c is closed by closing portion 16d. When the opening of detergent inlet 16c is closed by closing portion 16d, the above-mentioned first air hole 164 is formed between first notch 161 provided on the edge of detergent inlet 16c and packing 163.

[0057] As an example, closing portion 16d is configured in the shape of a cap with the inside of a cylinder hollowed out and the bottom open. As shown in Fig. 9, the side surface of the inner diameter of closing portion 16d that connects to protrusion 162 has a second notch 165 that is partially cut out and communicates with the inside of protrusion 162.

[0058] When the opening of detergent inlet 16c is closed by closing portion 16d, air opening 168 is formed between second notch 165, which is provided on the inner diameter of closing portion 16d on the side surface connected to protrusion 162, and fitting opening 166. Therefore, when detergent pump 21 is driven, second notch 165 acts as air opening 168 for sucking air from the outside of detergent tank 16 into detergent tank upper portion 16a, as shown by the arrow in Figure 10b.

[0059] Here, the cross-sectional area of ​​air vent 168 is configured to be larger than the cross-sectional area of ​​first air hole 164. Furthermore, air vent 168 is provided by cutting out the lower end of the outer surface of blocking portion 16d in embodiment 1, and therefore is configured to have at least a larger cross-sectional area than second air hole 167 shown in embodiment 1.

[0060] Furthermore, the protrusion 162 is configured to cover the upper and side of the air vent 168. This prevents the air vent 168 from being blocked by wash water pouring down from above the detergent tank 16 during the wash operation. The protrusion 162 also prevents the wash water sprayed from the wash nozzle 4 during the wash operation from entering the inside of the detergent tank 16 through the first air hole 164 and the air vent 168.

[0061] With the above configuration, detergent tank upper portion 16a has a path through which air can pass. The air passage is configured to include the inside of convex portion 162, air opening 168 defined by second notch 165, and first air hole 164 defined by first notch 161, and communicates from the outside of detergent tank 16 to the inside of detergent tank upper portion 16a. More specifically, the inside and outside of detergent tank 16 are communicated from first air hole 164 to the end of closing portion 16d.

[0062] As a result, when the detergent pump 21 is driven, air can be sucked from the outside of the detergent tank 16 into the detergent tank upper portion 16a, and the negative pressure in the detergent tank 16 can be eliminated.

[0063] Furthermore, if there is a portion in the air passageway that has a smaller cross-sectional area than the first air hole 164, there is a possibility that cleaning water around the air passageway will be sucked up when the detergent tank 16 is under negative pressure.

[0064] Therefore, in the second embodiment, the cross-sectional area of ​​first air hole 164 is configured to be the smallest among the cross-sectional areas at various points in the air passage. That is, the cross-sectional area of ​​first air hole 164 is configured to be smaller than the cross-sectional area of ​​the air passage outside first air hole 164, such as the cross-sectional area (cross-section A) between the top surface of convex portion 162 and fitting opening 166 and the cross-sectional area (cross-section B) between the lower end of the outer surface of convex portion 162 and fitting opening 166, as shown in Fig. 10b. Also, air opening 168 is configured to be larger than first air hole 164 by being provided by cutting out the lower end of the outer surface of blocking portion 16d in the first embodiment.

[0065] This allows the air passage path to be sealed with cleaning water from the end of the blocked portion 16d until the outside air reaches the first air hole 164, more effectively preventing the surrounding cleaning water from being sucked up when negative pressure is created in the detergent tank 16.

[0066] [2-2. Operation] During the washing process, when the detergent pump 21 dispenses the liquid detergent stored in the detergent tank 16 into the washing tub 2, it operates by sucking air that has passed from cross section B, cross section A, and the outside of the detergent tank 16 through the air vent 168 and the first air hole 164 into the detergent tank 16. When the washing water sprayed during the washing process pours down, the convex portion 162 acts as an umbrella, preventing the washing water from entering the detergent tank 16 through the air vent 168 even while the detergent pump 21 is operating.

[0067] [2-3. Effects, etc.] In this embodiment, fitting opening 166 has an outer diameter larger than detergent inlet 16c, and fitting closing portion 16d and fitting opening 166 fit together to close the opening of detergent inlet 16c. When the opening of detergent inlet 16c is closed by fitting opening 166, air opening 168, whose cross-sectional area is larger than that of first air opening 164, is formed between fitting opening 166 and second notch 165 provided in part of fitting opening 16d. This serves as an air opening for drawing air from outside detergent tank 16 into detergent tank upper portion 16a when detergent pump 21 is driven, thereby relieving negative pressure in detergent tank 16. It also prevents wash water from flowing back toward detergent pump 21.

[0068] Furthermore, in this embodiment, the detergent tank 16 has an air passage that connects the inside and outside of the detergent tank 16, running from the air opening 168 through the first air hole 164 to the end of the closed portion 16d, and the cross-sectional area of ​​the first air hole 164 is configured to be smaller than the cross-sectional area of ​​the air passage on the outside of the first air hole 164. This causes the air passage to be sealed with wash water, which can prevent the surrounding wash water from being sucked up when negative pressure is created in the detergent tank 16 and causing the wash water to flow back toward the detergent pump 21.

[0069] (Other embodiments) As described above, the first and second embodiments have been described as examples of the technology disclosed in the present application. However, the technology in the present disclosure is not limited to these, and can be applied to embodiments in which modifications, substitutions, additions, omissions, etc. are made. Furthermore, it is also possible to combine the components described in the first and second embodiments to create new embodiments.

[0070] Therefore, other embodiments will be exemplified below.

[0071] In the first and second embodiments, the description has been mainly given of tabletop or stand-alone dishwashers, but the technology of the present disclosure can also be applied to built-in dishwashers that are incorporated into system kitchens.

[0072] Dishwasher 40 may be provided with a treatment agent tank for storing a treatment agent for treating the items to be washed, instead of or in addition to detergent tank 16. The treatment agent may be a rinse agent or the like for accelerating drying of the items to be washed.

[0073] Although dishwasher 40 has been described as having first notch 161 and second notch 165 in detergent tank 16, an independently perforated air hole may be used instead of the notches. When providing an independent air hole, for example, the air hole may be perforated near fitting opening 166 directly below protrusion 162, which is a position where washing water is least likely to splash on the air hole. Even when the air hole is perforated, it is sufficient that an air passage leading to the inside of detergent tank 16 is formed.

[0074] In the first embodiment, it has been described that one air passage is formed in the detergent tank 16, but multiple air passages may be provided. Also, multiple protrusions or air holes may be provided for this purpose. By providing multiple air passages, even if one air passage is sealed with wash water, outside air can pass through the other air passages, so that detergent tank 16 can more reliably prevent the surrounding wash water from being sucked in when negative pressure is applied.

[0075] (Addendum) The above description of the embodiments discloses the following techniques. (Technology 1) a cleaning tank in which the object to be cleaned is accommodated; a detergent tank for storing a detergent for cleaning the object to be cleaned; Equipped with a detergent inlet for injecting the detergent into the detergent tank is provided inside the washing tub; The cleaning tank has a closing portion capable of closing the detergent inlet, and the cleaning tank is sealed. Dishwasher. This improves the stability of the main body 1. It also improves the stability of the main body 1 when opening and closing the door 3. It also allows a larger number of items to be washed to be accommodated in the washing tank 2. It also makes it easier to pour liquid detergent into the detergent tank 16. (Technology 2) At least a portion of the detergent tank is provided outside the washing tub. The dishwasher according to Art 1. This allows the cleaning tank 2 to accommodate a larger number of objects to be cleaned. (Technology 3) At least a portion of the detergent tank is provided below the washing tank. The dishwasher according to Art 2. This improves the stability of the main body 1. It also improves the stability of the main body 1 when opening and closing the door 3. It also allows a larger number of items to be washed to be accommodated in the washing tank 2. It also makes it easier to pour liquid detergent into the detergent tank 16. (Technology 4) At least a portion of the detergent tank is provided inside the washing tub. A dishwasher according to any one of the preceding claims 1 to 3. This allows the liquid detergent to be easily poured into the detergent tank 16. (Technology 5) A part of the detergent tank provided inside the washing tank is transparent or translucent. Dishwasher according to art 4. This makes it possible to prevent the liquid detergent from overflowing when pouring the liquid detergent into the detergent tank 16. (Technology 6) The detergent inlet is provided near an opening for accommodating the object to be cleaned in the cleaning tank. A dishwasher according to any one of the techniques 1 to 5. This allows the liquid detergent to be easily poured into the detergent tank 16. (Technology 7) a cleaning nozzle for spraying cleaning water onto the object to be cleaned contained in the cleaning tank; The detergent tank is provided below the cleaning nozzle. 7. A dishwasher according to any one of claims 1 to 6. This allows the cleaning tank 2 to accommodate a larger number of objects to be cleaned. (Technology 8) a detergent pump for introducing the detergent stored in the detergent tank into the washing tank; A detergent inlet for injecting the detergent stored in the detergent tank into the washing tank by the detergent pump is provided at a position higher than the liquid level of the washing water in the washing tank during the washing process. A dishwasher according to any one of the techniques 1 to 7. This prevents the wash water from flowing back toward the detergent pump 21. (Technology 9) the detergent inlet has an air hole for communicating the inside and outside of the detergent tank, The air hole is provided at a position higher than the liquid level of the cleaning water in the cleaning tank during the cleaning process. A dishwasher according to any one of the techniques 1 to 8. This makes it easier to draw air from the outside of the detergent tank 16 into the inside of the detergent tank upper part 16a, preventing negative pressure from occurring inside the detergent tank 16. It also prevents wash water stored in the washing tub 2 from flowing into the detergent tank 16 through the first air hole 164. (Technology 10) The blocking portion is configured to cover the air hole from above. Dishwasher according to art 9. This prevents the first air hole 164 from being blocked by wash water pouring down from above the detergent tank 16 during the wash operation. Also, it prevents the wash water sprayed from the wash nozzle 4 during the wash operation from entering the inside of the detergent tank 16 through the first air hole 164 and the second air hole 167. (Technology 11) When the opening of the detergent inlet is closed by the closing portion, the air hole is formed between a first notch provided on the edge of the detergent inlet and the packing of the closing portion. Dishwashers according to art 9 or 10. This eliminates the need to provide an air hole drilled independently on the outer surface of the detergent tank 16 or on the closing portion 16d, and allows the air hole to be formed by producing a part with a simple structure. (Technology 12) a fitting opening having an outer diameter larger than the detergent inlet, and the opening of the detergent inlet is closed by fitting the closing portion and the fitting opening together; When the opening of the detergent injection port is closed by the closing portion, an air opening having a cross-sectional area larger than that of the air hole is formed between a second notch provided in a part of the closing portion and the fitting opening. A dishwasher according to any one of claims 9 to 11. This allows the detergent pump 21 to function as an air vent for drawing air from the outside of the detergent tank 16 into the detergent tank upper portion 16a when the detergent pump 21 is driven, thereby eliminating negative pressure in the detergent tank 16. It also prevents wash water from flowing back toward the detergent pump 21. (Technology 13) the detergent tank has an air passage extending from the air hole to an end of the closing portion, the air passage communicating the inside and outside of the detergent tank; The area of ​​the air hole is configured to be smaller than the cross-sectional area of ​​the air passage outside the air hole. A dishwasher according to any one of claims 9 to 12. As a result, the air passage is sealed with cleaning water until the outside air reaches the first air hole 164 from the outside of the detergent tank 16, and the cleaning water around the detergent tank 16 is sucked up when the detergent tank 16 is under negative pressure, preventing the cleaning water from flowing back toward the detergent pump 21. [Industrial Applicability]

[0076] The present invention can be used in a dishwasher for washing items to be washed. [Explanation of symbols]

[0077] 1 Main unit 2 Cleaning tank 3 doors 3a opening 4 Cleaning nozzle 16 Detergent tank 16a Top of detergent tank 16b Lower part of detergent tank 16c Detergent inlet 16d Occlusion 17 Float Unit 17a Float 18 Reed Switch 19a filter 19b Filter 19c filter 21 Detergent pump 22 Detergent dispenser 40 Dishwasher 161 First notch 162 Convex part 163 Gasket 164 Air vent 165 Second notch 166 Fitting port 167 Second air vent 168 Air Vent

Claims

1. a cleaning tank in which the object to be cleaned is accommodated; a detergent tank for storing a detergent for cleaning the object to be cleaned; Equipped with a detergent inlet for injecting the detergent into the detergent tank is provided inside the washing tub; The cleaning tank has a closing portion capable of closing the detergent inlet, and the cleaning tank is sealed. Dishwasher.

2. At least a portion of the detergent tank is provided outside the washing tub.

2. The dishwasher of claim 1.

3. At least a portion of the detergent tank is provided below the washing tank.

3. The dishwasher of claim 2.

4. At least a portion of the detergent tank is provided inside the washing tub.

2. The dishwasher of claim 1.

5. A part of the detergent tank provided inside the washing tank is transparent or translucent.

5. The dishwasher of claim 4.

6. The detergent inlet is provided near an opening for accommodating the object to be cleaned in the cleaning tank. A dishwasher according to any one of claims 1 to 5.

7. a cleaning nozzle for spraying cleaning water onto the object to be cleaned contained in the cleaning tank; The detergent tank is provided below the cleaning nozzle. A dishwasher according to any one of claims 1 to 5.

8. a detergent pump for introducing the detergent stored in the detergent tank into the washing tank; A detergent inlet for injecting the detergent stored in the detergent tank into the washing tank by the detergent pump is provided at a position higher than the liquid level of the washing water in the washing tank during the washing process. A dishwasher according to any one of claims 1 to 5.

9. the detergent inlet has an air hole for communicating the inside and outside of the detergent tank, The air hole is provided at a position higher than the liquid level of the cleaning water in the cleaning tank during the cleaning process. A dishwasher according to any one of claims 1 to 5.

10. The blocking portion is configured to cover the air hole from above.

10. The dishwasher of claim 9.

11. When the opening of the detergent inlet is closed by the closing portion, the air hole is formed between a first notch provided on the edge of the detergent inlet and the packing of the closing portion.

10. The dishwasher of claim 9.

12. a fitting opening having an outer diameter larger than the detergent inlet, and the opening of the detergent inlet is closed by fitting the closing portion and the fitting opening together; When the opening of the detergent injection port is closed by the closing portion, an air port having a cross-sectional area larger than that of the air hole is formed between a second notch provided in a part of the closing portion and the fitting opening.

11. The dishwasher of claim 10.

13. the detergent tank has an air passage extending from the air hole to an end of the closing portion, the air passage communicating the inside and outside of the detergent tank; The cross-sectional area of ​​the air hole is configured to be smaller than the cross-sectional area of ​​the air passage outside the air hole.

11. The dishwasher of claim 10.

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