Cleaning device

Abstract

A cleaning device, wherein the cleaning device comprises: a housing; a cleaning tank, which is arranged in the housing and accommodates an object to be cleaned; a detergent tank, which is used to store a liquid detergent supplied to the cleaning tank; and a suspension, which is suspended in the liquid detergent. The suspension has a fitting portion (33a) that fits with a cylindrical rotating shaft (32), and the rotating shaft is arranged in the detergent tank or in a cover covering the opening of the detergent tank. The fitting portion (33a) has a notch portion (33b) in a cylindrical shape in which a part of the angular range of the side surface is missing in the axial direction. The notch portion (33b) is configured so that when the suspension rotates around the rotating shaft according to the liquid level of the liquid detergent, the notch portion faces upward relative to the horizontal direction. This can improve the convenience of the cleaning device.

Description

Technical Field

[0001] The present disclosure relates to a cleaning device for cleaning an object to be cleaned. Background Art

[0002] Conventionally, in built-in dishwashers used in a state of being assembled in an integrated kitchen, a washing tank having an openable and closable door at the front is generally fixed in a housing.

[0003] However, in recent years, a dishwasher that has a washing tank having an upper opening pulled out from a housing to accommodate and wash tableware, such as that described in Japanese Patent Application Laid-Open No. 2007-135650 (hereinafter referred to as "Patent Document 1"), has become mainstream.

[0004] The dishwashing machine disclosed in Patent Document 1 comprises: a washing tank having an opening at the top for accommodating tableware; a housing for supporting the washing tank so that it can be freely moved in and out in the front-rear direction; a detergent inlet provided outside the washing tank, through which detergent is introduced into the washing tank; and an introduction path connecting the detergent inlet with the washing tank. In addition, detergent is introduced from the detergent inlet provided at a position independent of the washing tank. Thus, detergent can be reliably introduced regardless of the size and shape of the tableware placed in the washing tank.

[0005] A dishwasher including a detergent storage container in a washing tank is disclosed in, for example, Japanese Patent Application Laid-Open No. 2000-225087 (hereinafter referred to as "Patent Document 2").

[0006] The dishwashing machine disclosed in Patent Document 2 has a detergent container that is detachably or integrally mounted on the inner wall of a washing tank. The detergent container is mounted at a height substantially the same as a water supply port for washing water provided on the inner wall of the washing tank or at a position above the water supply port. This prevents the detergent from spilling, flowing out, or solidifying before washing dishes, etc., thereby enabling effective washing of dishes, etc.

[0007] However, in the structure of the dishwasher of Patent Document 1, if detergent is added from the upper opening, the detergent will flow directly into the washing tank. In other words, the conventional dishwasher cannot store detergent in advance. Therefore, when using the dishwasher, the user must add the required amount of detergent into the washing tank each time.

[0008] Therefore, a structure in which a detergent container is detachably installed in a washing tank is considered, as disclosed in Patent Document 2. However, when the washing tank is entered or exited, or when the detergent container is detached, there is a possibility that the liquid detergent contained in the detergent container will spill or the liquid detergent will solidify due to splashing onto the detergent container, surrounding components, etc. Summary of the invention

[0009] Problem that the invention aims to solve

[0010] The present disclosure provides a dishwasher capable of improving the convenience of a washing device.

[0011] Solutions for solving problems

[0012] A cleaning device according to a technical solution of the present invention comprises: a housing; a cleaning tank, which is provided in the housing and accommodates an object to be cleaned; a detergent tank, which is used to store a liquid detergent supplied to the cleaning tank; and a suspension, which is suspended in the liquid detergent. The suspension has a fitting portion that fits with a cylindrical rotating shaft, and the rotating shaft is provided in the detergent tank or in a cover covering the opening of the detergent tank. The fitting portion has a notch portion in a cylindrical shape in which a part of the angular range of the side surface is missing in the axial direction. In addition, the notch portion is configured so that when the suspension rotates around the rotating shaft according to the liquid level of the liquid detergent, the notch portion faces upward relative to the horizontal direction.

[0013] Effects of the Invention

[0014] According to the present disclosure, it is possible to provide a dishwasher that can improve the convenience of the washing device. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic side view of the dishwasher in the state where the washing tank is pulled out from the housing according to the first embodiment.

[0016] Figure 2 This is a schematic front view of the dishwasher showing a state in which the detergent tank is being stored or in the process of being pulled out according to the first embodiment.

[0017] Figure 3 This is a schematic front view of the dishwasher showing a state in which the detergent tank according to the first embodiment is stored.

[0018] Figure 4 This is a schematic side view of another example of the dishwasher in the state where the washing tank is pulled out from the housing according to the first embodiment.

[0019] Figure 5 It is a schematic front view of the dishwasher in the state where the detergent tank is stored according to the second embodiment.

[0020] Figure 6 It is a schematic side view of the dishwasher in the state where the washing tank is pulled out from the casing according to the second embodiment.

[0021] Figure 7 It is a schematic side view of the dishwasher according to the third embodiment.

[0022] Figure 8 It is a schematic front view of the dishwasher of Embodiment 3.

[0023] Fig. 9 It is a schematic front view of the dishwasher of Embodiment 3.

[0024] Fig.10 It is a schematic front view of the dishwasher of Embodiment 3.

[0025] Fig.11 It is a schematic front view of the dishwasher of Embodiment 3.

[0026] Fig. 12A This is a partially enlarged view showing a state where the detergent tank is stored in the detergent tank storage portion.

[0027] Fig. 12B This is a partially enlarged view showing a state where the detergent tank is stored in the detergent tank storage portion.

[0028] Fig.13 It is a diagram schematically showing a cross section of a detergent tank.

[0029] Fig.14A It is a diagram schematically showing a cross section of a detergent tank.

[0030] Fig. 14B It is a diagram schematically showing a cross section of a detergent tank.

[0031] Fig.15A It is a figure which shows the lower surface of the cover of a detergent tank.

[0032] Fig. 15B It is a figure which shows the lower surface of the cover of a detergent tank.

[0033] Fig. 15C It is a figure which shows the lower surface of the cover of a detergent tank.

[0034] Fig.16 It is a diagram schematically showing the relationship between the arm portion and the rotation axis.

[0035] Fig.17A It is a diagram schematically showing a cross section of an arm portion and a rotation shaft.

[0036] Fig. 17B It is a diagram schematically showing a cross section of an arm portion and a rotation shaft.

[0037] Fig.18 It is a diagram showing a configuration of a control device for controlling the dishwasher according to the embodiment.

[0038] Fig.19 This is a graph showing the viscosity of liquid detergent measured using a rotational viscometer.

[0039] Fig. 20 This is a flowchart showing the steps of a method for controlling a dishwasher according to an embodiment.

[0040] Fig.21 This is a flowchart showing the steps of a method for controlling a dishwasher according to an embodiment.

[0041] Fig.22A This is a diagram schematically showing another example of the detergent tank.

[0042] Fig. 22B This is a diagram schematically showing another example of the detergent tank.

[0043] Fig.23 It is a diagram schematically showing a cross section of a foreign matter capturing portion.

[0044] Fig.24A This is a diagram schematically showing a state in which a foreign matter trap is attached to a detergent discharge port.

[0045] Fig. 24B This is a diagram schematically showing a state in which a foreign matter trap is attached to a detergent discharge port.

[0046] Fig.24C This is a diagram schematically showing a state in which a foreign matter trap is attached to a detergent discharge port.

[0047] Fig.24D This is a diagram schematically showing a state in which a foreign matter trap is attached to a detergent discharge port.

[0048] Fig.25 It is a diagram schematically showing a cross section when the detergent tank is stored in the detergent tank storage portion. DETAILED DESCRIPTION

[0049] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. However, the present invention is not limited to the embodiments.

[0050] (Implementation Method 1)

[0051] The following reference Figure 1 A schematic structure of the dishwasher according to the first embodiment will be described.

[0052] Figure 11 is a schematic side view of the dishwasher in the state where the washing tank 1 is pulled out from the housing 2 according to the first embodiment. Figure 1 A schematic side view showing a state in which washing tank 1 of a dishwasher is pulled out from housing 2 of the dishwasher.

[0053] The dishwasher of Embodiment 1 is a built-in dishwasher mounted in, for example, a kitchen or the like.

[0054] In the first embodiment, as shown in the figure, the front is set as the direction in which the door body 3 and the washing tank 1 are pulled out, and the rear is set as the direction in which the washing tank 1 is stored and the door body 3 is closed, and the description is given. In addition, hereinafter, the side of the opening 1a of the washing tank 1 of the dishwasher is set as the top, and the opposite side is set as the bottom, and further, the right side when viewed from the front of the door body 3 is set as the right side, and the left side is set as the left side, and the description is given.

[0055] like Figure 1 As shown, the dishwasher of Embodiment 1 includes: housing 2; washing tank 1, side wall 12, detergent tank 15, control device 19 arranged inside housing 2; and door 3 for opening and closing the opening of housing 2.

[0056] The washing tank 1 has an opening 1a at the top, and a basket 7 for accommodating tableware 8 is arranged inside. The washing tank 1 has a first rail 5 fixed at the bottom. On the other hand, the housing 2 has a second rail 6 fixed to the inner side of the inner surface. The first rail 5 is supported by the second rail 6 of the housing 2 in a movable manner. Thus, the washing tank 1 is supported in the front-back direction (in the Figure 1 The left and right directions on the paper surface) can be freely entered and exited from the shell 2.

[0057] The washing tank 1 has a plane portion 23 disposed in front of the upper outer front portion, i.e., the opening portion 1a. The plane portion 23 is provided with an operation portion 24, a display portion 25, etc. The operation portion 24 sets the washing program of the dishwasher, the power on and off, etc. according to the operation of the user. The display portion 25 displays the washing status, the operation status, the time, etc. In addition, an operation display substrate (not shown) for controlling the operation of the operation portion 24 and the display portion 25 is disposed on the back side of the plane portion 23 on which the operation portion 24 and the display portion 25 are disposed.

[0058] The side walls 12 are disposed on both sides between the washing tank 1 and the door body 3. The side walls 12 connect the washing tank 1 and the door body 3 so as to be movable as a whole. At this time, the dishwasher has a front space 13 formed by dividing the front side of the washing tank 1, the rear side of the door body 3, the side walls 12 and the flat surface 23.

[0059] The door body 3 is provided with a handle 4 provided so as to protrude forward on the upper side. The handle 4 is gripped by a user to move the washing tank 1 in and out of the housing 2.

[0060] In addition, washing water for washing tableware in the washing tank 1 is supplied to the dishwasher of the first embodiment by the path shown below. Specifically, first, washing water such as tap water is supplied to a water supply path such as a water supply hose from a branch faucet on the integrated kitchen (not shown). The supplied washing water is supplied to the washing tank 1 via the water supply path to a required water level and a required amount by a water supply pump and a water supply valve (not shown). The washing water is supplied to the washing tank 1 by the path configured as described above.

[0061] The washing tank 1 is provided with a circulation pump 9 disposed at the lower outer side. The circulation pump 9 is configured to circulate the washing water supplied to the washing tank 1 through a circulation path and to spray the washing water from the washing nozzle 11. Then, the tableware 8 can be washed with the sprayed washing water. In addition, a heater 10 for heating the washing water is also disposed near the bottom of the washing tank 1.

[0062] In addition, the dishwasher of the first embodiment has a drainage path for discharging washing water from the washing tank 1. The drainage path is composed of a drainage pump and a drainage hose, which are not shown. In addition, when the washing and rinsing of the tableware 8 are completed, the drainage pump is driven to discharge the washing water to the outside through the drainage hose. In other words, the drainage path is configured to be able to discharge the washing water in the washing tank 1 to a sink in the kitchen.

[0063] The cleaning tank 1 includes a detergent tank storage portion 14, which is arranged in the outer front, that is, the front space portion 13, and accommodates a detergent tank 15 in a freely accessible manner. The detergent tank storage portion 14 is formed on one side of the side wall 12 by welding, screwing, or integrally forming with the side wall 12. In addition, the detergent tank storage portion 14 may be provided on the front surface of the cleaning tank 1.

[0064] The dishwasher of Embodiment 1 is configured as described above.

[0065] Next, refer to Figure 2 and Figure 3 The structure around detergent tank 15 of the dishwasher will be described.

[0066] Figure 2 It is a schematic front view of the dishwasher showing a state in which detergent tank 15 is in the process of being stored or in the process of being pulled out. Figure 3 It is a schematic front view of the dishwasher showing a state in which detergent tank 15 is stored.

[0067] like Figure 2 and Figure 3As shown, the detergent tank storage portion 14 has a cavity-like space. The detergent tank 15 is stored in the space of the detergent tank storage portion 14 in a freely accessible manner. When viewed from the front (the front side of the door body 3), the detergent tank 15 is stored in a freely accessible manner, for example, in the left-right direction (lateral direction).

[0068] In addition, if Figure 1 As shown, detergent tank storage section 14 is disposed substantially below (including below) flat section 23 (operation section 24 or display section 25 ), for example, in a range from the center to the right side of washing tub 1 , and stores detergent tank 15 .

[0069] In addition, Figure 2 and Figure 3 In the figure, the structure of pulling out the detergent tank 15 from the detergent tank storage part 14 to the right is shown as an example, but it is not limited to this. For example, the detergent tank storage part 14 and the detergent tank 15 may be arranged at the same Figure 2 , Figure 3 In this case, it is preferable that the detergent tank 15 is pulled out from the detergent tank storage portion 14 to the left.

[0070] According to the above structure, when the washing tank 1 is completely stored in the housing 2, the detergent tank 15 is not conspicuous. Therefore, the dishwasher can be constructed with a simple design. In addition, the space (front space 13) for storing the detergent tank 15 outside the washing tank 1 can be effectively used.

[0071] In addition, if Figure 1 As shown, the detergent tank 15 is configured so that when the cleaning tank 1 is pulled forward by at least a distance a ( Figure 1 In the state above the dotted arrow (shown in FIG. 1 ), the detergent tank 15 can be freely moved in and out of the detergent tank storage section 14 in the left and right directions. In addition, the distance a represents the shortest distance between the back surface of the door body 3 and the frontmost interface of the housing 2 and the surface of the detergent tank storage section 14 on the side of the washing tank 1. That is, the distance a represents the state after at least the detergent tank storage section 14 is pulled out from the frontmost part of the housing 2 to the front side as a whole.

[0072] According to the above structure, the detergent tank 15 can be moved in and out only when the cleaning tank 1 is pulled forward by a predetermined distance (distance a) or more. Therefore, the user can easily move the detergent tank 15 in and out by using the space in front of the cleaning tank 1 storing the detergent tank 15 and the lateral space when the cleaning tank 1 is pulled out from the housing 2. In addition, the distance a is not particularly limited as long as it is a distance that the detergent tank 15 can move in and out in the left and right directions.

[0073] In addition, as described above, the dishwasher of Embodiment 1 has an operation unit 24, which is provided at the upper front portion outside the washing tank 1, for the user to set the washing program, turn the power on and off, etc. Thus, the user can operate the operation unit 24 with one hand, for example, from the upper front portion of the washing tank 1. At this time, the user can simultaneously move the detergent tank 15 in and out in the left and right directions with the other hand. As a result, the user's operability can be improved.

[0074] Detergent tank 15 is composed of a bottle-shaped container storing liquid detergent, for example. Specifically, detergent tank 15 is composed of detergent tank detergent discharge port 15c, detergent tank detergent suction path 15d, detergent introduction cover 15e, and the like.

[0075] The detergent tank detergent outlet 15c, the detergent tank detergent suction path 15d, and the detergent introduction cover 15e are integrally formed and are configured to be detachable relative to the detergent tank 15. Therefore, when the detergent introduction cover 15e is removed from the detergent tank 15, the detergent tank detergent outlet 15c and the detergent tank detergent suction path 15d, which are integrally formed, can also be removed from the detergent tank 15 at the same time. In addition, the top end of the detergent tank detergent suction path 15d that attracts liquid detergent extends to the vicinity of the bottom surface of the detergent tank 15. Thus, the liquid detergent can be attracted from the detergent tank 15 until there is almost no detergent. Therefore, the liquid detergent in the detergent tank 15 can be efficiently used without waste.

[0076] When the user replenishes liquid detergent into detergent tank 15, the user first removes detergent tank 15 from detergent tank storage portion 14. Then, the user removes detergent insertion cover 15e from detergent tank 15. Thus, the user can easily replenish detergent tank 15 with liquid detergent.

[0077] According to the structure of the detergent tank 15, liquid detergent can be supplied and stored in the detergent tank 15 from the outside of the washing tank 1. Therefore, it is possible to suppress the solidification of the detergent in the detergent tank 15 due to moisture, dryness, etc. in the washing tank 1 during washing. In addition, the volume of the washing tank 1 can be increased by an amount corresponding to the amount of not arranging the detergent tank 15 in the washing tank 1. Moreover, the user can easily detach the detergent tank 15.

[0078] That is, in the past, a control substrate such as an operation unit and a display unit was arranged between the cleaning tank and the door body, and the space outside the substrate was a useless space. Therefore, in this embodiment, the detergent tank 15 is arranged in parallel with the substrate in the left-right direction in the useless space. In this way, the useless space can be effectively utilized, and the volume of the cleaning tank 1 can be increased by an amount corresponding to not arranging the detergent tank 15 in the cleaning tank 1 compared with the conventional cleaning tank.

[0079] In addition, if Figure 2 As shown, the detergent tank detergent outlet 15c of the detergent tank 15 has a convex portion 15f protruding convexly to the left side from the detergent introduction cover 15e. On the other hand, the detergent tank storage section 14 has a concave portion 14c for engaging the convex portion 15f of the detergent tank detergent outlet 15c. In addition, the concave portion 14c of the detergent tank storage section 14 engages with the convex portion 15f of the detergent introduction cover 15e. Thus, the storage of the detergent tank 15 in the detergent tank storage section 14 is completed.

[0080] Then, when the detergent tank 15 is accommodated in the detergent tank storage section 14 by the engagement of the concave section 14c and the convex section 15f, a path for transferring liquid detergent from the detergent tank detergent discharge port 15c to the detergent tank storage section side detergent discharge path 14b is formed. Furthermore, the engagement of the convex section 15f and the concave section 14c enables the detergent tank 15 to be stably accommodated in the detergent tank storage section 14.

[0081] In addition, the detergent tank storage section 14 has a detergent tank storage section detergent outlet 14a provided in the recess 14c. One end of a detergent tank storage section side detergent outlet path 14b is arranged and connected to the detergent tank storage section detergent outlet 14a. On the other hand, a detergent pump 16 as an example of a detergent delivery section is connected to the other end of the detergent tank storage section side detergent outlet path 14b. As another example of a detergent delivery section, a solenoid valve may also be used. Furthermore, between the detergent pump 16 and a washing tank detergent outlet 17 (see FIG. 1 ) provided on the front surface of the washing tank 1, a detergent pump 16 is connected to the washing tank detergent outlet 17 (see FIG. 1 ) provided on the front surface of the washing tank 1. Figure 1 ) is connected to the washing tank side detergent discharge path 18. That is, the detergent pump 16 is arranged between the other end of the detergent tank storage portion side detergent discharge path 14b and the washing tank side detergent discharge path 18, that is, in the middle of the detergent input path.

[0082] As described above, the detergent tank 15 has a detergent tank detergent discharge port 15c for discharging liquid detergent to the detergent tank storage portion side detergent discharge path 14b. The detergent tank storage portion side detergent discharge path 14b is connected to the detergent tank storage portion 14. That is, when the detergent tank 15 is stored in the detergent tank storage portion 14, the detergent tank detergent discharge port 15c is configured to be connected to the detergent tank storage portion side detergent discharge path 14b.

[0083] In addition, if Figure 1 As shown, the control device 19 is disposed below the front surface of the washing tank 1. The control device 19 controls the driving of the circulation pump 9, the drainage pump, the water supply pump (water supply valve), the detergent pump 16, and the like, for example.

[0084] Specifically, the control device 19 controls the driving rotation speed, driving time, etc. of the detergent pump 16. Thus, when washing the tableware 8 and the like, a required amount of liquid detergent is sucked from the detergent tank 15. The sucked liquid detergent is sequentially supplied to the washing tank 1 via the detergent tank detergent suction path 15d, the detergent tank detergent discharge port 15c, the detergent tank storage portion detergent discharge port 14a, the detergent tank storage portion side detergent discharge path 14b, the detergent pump 16, the washing tank side detergent discharge path 18, and the washing tank detergent discharge port 17. That is, the structure is such that the liquid detergent accumulated in the detergent tank 15 can be transferred to the washing tank 1 and supplied.

[0085] The periphery of detergent tank 15 of the dishwasher is configured as described above, and liquid detergent is supplied into washing tub 1 .

[0086] The following reference Figure 4 The structure of another example of the dishwasher according to the first embodiment will be described.

[0087] Figure 4 This is a schematic side view of another example of the dishwasher in the state where washing tank 1 according to Embodiment 1 is pulled out from housing 2 .

[0088] like Figure 4 As shown, another example of a dishwasher has a transparent portion 15a provided at least partially on the side of the detergent tank 15. When the detergent tank 15 is stored in the detergent tank storage portion 14, the user can visually check the remaining amount of liquid detergent in the detergent tank 15 through the transparent portion 15a. The transparent portion 15a also has a scale 15b indicating the amount of liquid detergent. Thus, even when the detergent tank 15 is stored in the detergent tank storage portion 14, the user can visually check the amount of detergent in the detergent tank 15 from the side with the help of the transparent portion 15a. Therefore, the user can infer the reduction of liquid detergent, the timing of replenishment, etc. by visual inspection. As a result, the user can pull out the detergent tank 15 and easily replenish the liquid detergent at an appropriate time.

[0089] (Implementation Method 2)

[0090] The following reference Figure 5 and Figure 6 A schematic structure of a dishwasher according to a second embodiment will be described.

[0091] Figure 5 It is a schematic front view of the dishwasher in the state where detergent tank 15 is stored according to the second embodiment. Figure 6 This is a schematic side view of the dishwasher in the state where washing tank 1 is pulled out from housing 2 according to Embodiment 2.

[0092] like Figure 5 and Figure 6 As shown, in the dishwasher of Embodiment 2, the arrangement positions of operation unit 24 and display unit 25 and the structure of handle 4 are different from those of Embodiment 1. The other structures are the same as those of Embodiment 1, and therefore, the description of the duplicate structures will be omitted.

[0093] That is to say, Figure 5 As shown, the operation unit 24 and the display unit 25 of the dishwasher of the second embodiment are arranged on the upper front surface of the door body 3. The handle 4 is formed in a shape that is recessed toward the inner side of the door body 3. The operation unit 24 sets the washing program and turns the power on and off according to the user's operation in the same manner as in the first embodiment. The display unit 25 displays the washing status, operation status, time, etc.

[0094] The operation unit 24 and the display unit 25 of the second embodiment are arranged on the front side of the door body 3 at the upper front portion outside the washing tank 1. Thus, as in the first embodiment, the user can operate the operation unit 24 from the upper front portion of the washing tank 1 while, for example, simultaneously moving the detergent tank 15 in and out of the detergent tank storage unit 14 from the left and right directions.

[0095] In addition, you can Figure 6 In the illustrated embodiment, one of the operation unit 24 and the display unit 25 is disposed on the plane portion 23 , and the other of the display unit 25 and the operation unit 24 is disposed on the upper front surface of the door body 3 , as in the first embodiment.

[0096] Furthermore, the contents described in the first embodiment and the contents described in the second embodiment may be freely combined within the described range to configure a dishwasher. This can improve the degree of freedom in design and versatility of the dishwasher.

[0097] (Implementation 3)

[0098] The following reference Figure 7 A schematic structure of a dishwasher according to a third embodiment will be described.

[0099] Figure 7 It is a schematic side view of the dishwasher according to the third embodiment.

[0100] like Figure 7 As shown, in the dishwasher of Embodiment 3, the structures of the detergent tank storage portion and the detergent tank are different from those of Embodiments 1 and 2. The other structures and operations are the same as those of Embodiments 1 and 2, and therefore, the description of the duplicate structures is omitted.

[0101] The following mainly describes the differences from the first and second embodiments.

[0102] That is to say, Figure 7As shown in FIG. 1 , the dishwasher of the third embodiment includes a float 34 as an example of a suspension suspended in the liquid detergent in the detergent tank 30. The float 34 has a function of suppressing waves generated by the liquid detergent stored in the detergent tank 30 when the detergent tank 30 is moved in and out of the washing tank 1 or the housing 2. The float 34 is connected to the detergent tank 30 by a rotating shaft 32 (see FIG. 1 ) provided on the lid of the detergent tank 30 via an arm 33. Figure 8 The buoy 34 is provided with a magnetic body 35 .

[0103] The detergent tank 30 is stored in the detergent tank storage portion 40 in a freely accessible manner. When washing is started with the detergent tank 30 stored in the detergent tank storage portion 40, a suitable amount of liquid detergent stored in the detergent tank 30 is sucked out by the detergent pump 16 as an example of a detergent conveying portion. The sucked out liquid detergent is supplied to the washing tank 1 via the detergent tank storage portion side detergent discharge path 43 and the washing tank side detergent discharge path 18.

[0104] The detergent tank storage portion 40 includes a magnetic sensor 41 as an example of a detection unit, which is disposed on the outer side surface and detects the magnetism of the magnetic body 35. The magnetic sensor 41 detects the magnetism of the magnetic body 35, thereby detecting that the detergent tank 30 is stored in the detergent tank storage portion 40.

[0105] Next, refer to Figure 8 to Figure 11 The structure around detergent tank 30 of the dishwasher will be described.

[0106] Figure 8 to Figure 11 1 is a schematic front view of a dishwasher according to Embodiment 3. In detail, Figure 8 It is a schematic front view of the dishwasher when no liquid detergent is stored in detergent tank 30 . Fig. 9 It is a schematic front view of the dishwasher when detergent tank 30 is pulled out from detergent tank storage portion 40 when no liquid detergent is stored in detergent tank 30 . Fig.10 It is a schematic front view of the dishwasher when liquid detergent is stored in detergent tank 30 . Fig.11 It is a schematic front view of the dishwasher when liquid detergent is stored in detergent tank 30 and detergent tank 30 is pulled out from detergent tank storage portion 40 .

[0107] As described above, float 34 is pivotally supported by rotating shaft 32 provided on cover 31 covering the opening of detergent tank 30 via arm portion 33 .

[0108] The detergent tank 30 includes a cover 31 , a rotation shaft 32 , an arm 33 , a float 34 , a magnetic body 35 , a detergent discharge port 37 , and the like, and is configured to be housed in the detergent tank housing portion 40 .

[0109] The detergent tank storage portion 40 includes, for example, a magnetic sensor 41 as an example of a detection unit provided on an inner surface facing the magnetic body 35. The magnetic sensor 41 is disposed near the control device 50, for example.

[0110] like Figure 8 and Fig. 9 As shown, when liquid detergent is not stored in detergent tank 30, float 34 and arm 33 are pivotally supported by rotation shaft 32 in a state of hanging vertically downward due to their own weight.

[0111] On the other hand, when liquid detergent is stored in the detergent tank 30, Fig.10 and Fig.11 As shown, the float 34 floats up according to the liquid level of the liquid detergent. In addition, according to the rising liquid level, the arm 33 rotates upward around the rotation shaft 32. At this time, the magnetic sensor 41 detects the position of the magnetic body 35 of the float 34. Thus, the liquid level of the liquid detergent in the detergent tank 30 is detected.

[0112] In addition, if Fig. 9 and Fig.11 As shown, when the detergent tank 30 is not stored in the detergent tank storage portion 40, the magnetic sensor 41 and the magnetic body 35 are not arranged opposite to each other. Therefore, the magnetic sensor 41 cannot detect the magnetism of the magnetic body 35. Thus, it can be detected that the detergent tank 30 is not stored in the detergent tank storage portion 40.

[0113] Magnetic sensor 41 is constituted by, for example, a plurality of Hall elements provided near positions of magnetic body 35 corresponding to a plurality of liquid levels of the liquid detergent in detergent tank 30. This makes it possible to more accurately detect the liquid level of the liquid detergent.

[0114] In addition, the magnetic sensor 41 may be constituted by a sensor capable of detecting the magnetism of the magnetic body 35 in any manner, such as a magnetoresistance effect element, a magneto-impedance element, etc., other than the above-mentioned Hall element.

[0115] In addition, the magnetic sensor 41 is preferably arranged on the side of the detergent tank storage portion 40 that is farther from the control device 50. This can reduce the influence of the magnetic field generated in the circuit of the control device 50 on the magnetic sensor 41. As a result, the detection accuracy of the magnetic sensor 41 is further improved.

[0116] Detergent outlet 37 is provided at the bottom end of the side surface on the inner side in the inlet and outlet direction of detergent tank 30. Detergent receiving port 42 is provided at a position abutting against detergent outlet 37 of detergent tank 30 of detergent tank storage portion 40 when detergent tank 30 is stored in detergent tank storage portion 40.

[0117] When detergent pump 16 is operated, liquid detergent in detergent tank 30 is supplied to washing tub 1 via detergent discharge port 37 , detergent receiving port 42 , detergent tank storage unit side detergent discharge path 43 , and washing tub side detergent discharge path 18 .

[0118] Inner bottom surface 36 of detergent tank 30 is formed to be inclined so as to be lowered toward detergent discharge port 37. Thus, liquid detergent can be introduced into detergent discharge port 37 without the liquid detergent remaining in detergent tank 30.

[0119] Next, refer to Fig. 12A and Fig. 12B , the relationship between the magnetic sensor 41 and the magnetic body 35 with respect to the liquid level of the liquid detergent when the detergent tank 30 is stored in the detergent tank storage portion 40 will be described.

[0120] Fig. 12A This is a schematic side view of detergent tank 30 and detergent tank storage portion 40 when the liquid level of the liquid detergent in detergent tank 30 is low. Fig. 12B This is a schematic side view of detergent tank 30 and detergent tank storage portion 40 when the liquid level of the liquid detergent in detergent tank 30 is high.

[0121] like Fig. 12A and Fig. 12B As shown in FIG. 1 , magnetic sensor 41 as an example of a detection unit detects a position corresponding to the liquid level of the liquid detergent of magnetic body 35. Thus, magnetic sensor 41 can detect the liquid level of the liquid detergent.

[0122] Next, refer to Fig.13 The state of liquid detergent 38 in detergent tank 30 of the dishwasher will be described.

[0123] Fig.13 1 is a diagram schematically showing a cross section of detergent tank 30 .

[0124] like Fig.13 As shown, when liquid detergent 38 is stored in detergent tank 30, when washing tank 1 is pulled out from housing 2 or detergent tank 30 is pulled out from detergent tank storage portion 40, waves are generated on the surface of liquid detergent 38 as shown by the double dashed lines in the figure. Fig. 9 Waves are similarly generated in the detergent tank shown.

[0125] Therefore, the dishwasher of this embodiment has a buoy 34 provided to eliminate waves generated on the surface of the liquid detergent 38. The buoy 34 is formed, for example, of a material that floats in the liquid detergent 38. That is, the buoy 34 is suspended on the liquid surface of the liquid detergent 38, thereby eliminating the waves generated. The inventors of the present invention have clarified these phenomena (for example, the wave-breaking effect) through experiments. As a result, compared with a structure in which the buoy 34 is not provided, the waves generated in the liquid detergent 38 can be effectively suppressed. As a result, the solidification of the liquid detergent caused by spilling the liquid detergent from the detergent tank 30 when using the dishwasher or when replenishing the liquid detergent to the detergent tank 30, or by adhering to surrounding components, etc., can be prevented in advance.

[0126] The float 34 is formed of thermoplastic resins such as polypropylene (PP) and polyethylene (PE), or metals such as stainless steel. When the float 34 is formed of a metal material, it is preferable to provide a cavity inside the float 34. Thus, the float 34 easily floats on the surface of the liquid detergent.

[0127] The float 34 and the arm portion 33 may be formed integrally, or may be formed separately and joined to form an integral whole.

[0128] The arm 33 is detachably supported by the rotation shaft 32 provided on the cover 31 of the detergent tank 30. Thus, the user can remove the arm 33 and the float 34 from the cover 31 and wash them easily. The arm 33 may be formed integrally with the cover 31 of the detergent tank 30.

[0129] Next, refer to Fig.14A and Fig. 14B The structure of detergent tank 30 of still another example of the dishwasher will be described.

[0130] Fig.14A and Fig. 14B 3 is a diagram schematically showing a cross section of the detergent tank 30. In detail, Fig.14A 1 is a diagram schematically showing a cross section of detergent tank 30 when the liquid level of liquid detergent is high. Fig. 14B 1 is a diagram schematically showing a cross section of detergent tank 30 when the liquid level of the liquid detergent in detergent tank 30 is low.

[0131] like Fig.14A and Fig. 14B As shown, the detergent tank 30 has an atmosphere opening 39 provided on the cover 31 and communicating with the outside.

[0132] In addition, the cover 31 is provided in a manner that covers the opening formed above the detergent tank 30 in an airtight and liquid-tight manner. Therefore, when the liquid detergent 38 is discharged from the detergent tank 30, the inside of the detergent tank 30 becomes a negative pressure. As a result, the discharge of the liquid detergent 38 may not be carried out smoothly. Therefore, an atmospheric opening 39 is provided in the cover 31. As a result, when the liquid detergent 38 is discharged from the detergent tank 30, the outside air flows into the detergent tank 30 from the atmospheric opening 39. As a result, it is possible to prevent the detergent tank 30 from becoming a negative pressure when the liquid detergent 38 is discharged. Therefore, an accurate amount of liquid detergent 38 can be supplied from the detergent tank 30 to the washing tank 1. As a result, it is possible to suppress the deviation in the amount of the supplied liquid detergent 38. As a result, it is possible to maintain a high reliability of the washing performance of the dishwasher.

[0133] In addition, if the liquid detergent 38 adheres to the air opening 39 and solidifies, the air opening 39 is blocked, and the function of allowing the outside air to flow into the detergent tank 30 is reduced. That is, the inside of the detergent tank 30 becomes negative pressure, and there is a possibility that an appropriate amount of liquid detergent 38 cannot be supplied from the detergent tank 30 to the washing tank 1. Therefore, in order to avoid the occurrence of the above phenomenon, the dishwasher of this embodiment is provided with the air opening 39 above the moving range of the float 34 of the cover 31. At this time, when the liquid level of the liquid detergent 38 in the detergent tank 30 is high, when the detergent tank 30 is taken in and out, the liquid detergent 38 is splashed from the liquid surface due to the generation of waves, and it is easy to splash to the air opening 39. However, in the dishwasher of this embodiment, the float 34 floats on the liquid surface of the liquid detergent 38 directly below the air opening 39, thereby eliminating the waves of the liquid detergent 38. Therefore, it is possible to more reliably suppress the liquid detergent 38 from splashing to the air opening 39.

[0134] Next, refer to Figures 15A to 15C The structure of the lid 31 of the detergent tank 30 of the dishwasher will be described.

[0135] Figures 15A to 15C 3 is a diagram showing the lower surface of the cover 31 of the detergent tank 30. In detail, Fig.15A It is a bottom surface view of the cover 31. Fig. 15B It is a perspective view of the lower surface of the cover 31. Fig. 15C It is an enlarged perspective view of the vicinity of the atmosphere opening 39 of the cover 31 .

[0136] like Figures 15A to 15CAs shown, the lid 31 of the detergent tank 30 of the dishwasher of this embodiment has a protrusion 39a, which is provided near the atmosphere opening 39 and protrudes from the lower surface of the lid 31 toward the inside of the detergent tank 30. The protrusion 39a functions as a wall for protecting the liquid detergent 38 splashing from the liquid surface from splashing onto the atmosphere opening 39. This can further effectively prevent the liquid detergent 38 from splashing onto the atmosphere opening 39. In addition, the protrusion 39a may be formed integrally with the lid 31, or may be formed separately from the lid 31 and attached to the lid 31.

[0137] The protrusion 39a is arranged so that when the float 34 moves upward, at least a portion of the float 34 or the arm 33 approaches the protrusion 39a or abuts against the protrusion 39a. That is, when the liquid level of the liquid detergent 38 in the detergent tank 30 is high, the possibility of the liquid detergent 38 splashing to the atmosphere opening 39 increases. In this case, the float 34 floats on the liquid surface of the liquid detergent 38, and the gap between the float 34 or the arm 33 and the protrusion 39a becomes narrower. This prevents the liquid detergent 38 from entering from the gap, and the possibility of the liquid detergent 38 splashing to the atmosphere opening 39 is reduced. In addition, the protrusion 39a can also be arranged so that when the float 34 moves upward, it approaches at least a portion of other components (such as the arm 33) that move together with the float 34, or abuts against at least a portion of other components.

[0138] The protrusion 39a is formed in a cylindrical shape, for example, surrounding the atmosphere opening 39, and has a notch 39b in a part thereof. The notch 39b prevents a film from forming at the opening of the protrusion 39a when the liquid detergent 38 contacts. As a result, clogging of the atmosphere opening 39 due to the film can be further suppressed.

[0139] As described above, the dishwashing machine of this embodiment is configured so that the washing tank 1 can be freely moved in and out relative to the housing 2. Therefore, when the dishes and other objects to be washed are moved in and out, each time the washing tank 1 is moved in and out relative to the housing 2, the liquid detergent 38 shakes in the direction of the washing tank 1 to generate waves. Therefore, it is preferable to have a structure in which the notch 39b is provided in a direction different from the direction of the washing tank 1. Thus, it is possible to prevent the liquid detergent 38 from entering the protrusion 39a from the notch 39b due to the waves of the liquid detergent 38 generated when the washing tank 1 is moved in and out. As a result, it is possible to more reliably suppress the liquid detergent 38 from splashing onto the atmosphere opening 39.

[0140] In addition, the dishwasher of the present embodiment is configured so that the detergent tank 30 can be freely moved in and out of the detergent tank storage portion 40. Therefore, when the liquid detergent 38 is replenished, each time the detergent tank 30 is moved in and out of the detergent tank storage portion 40, the liquid detergent 38 shakes in the direction of the detergent tank 30 to generate waves. Therefore, the notch 39b may be provided in a direction different from the direction of the detergent tank 30. Thus, it is possible to prevent the liquid detergent 38 from entering the protrusion 39a from the notch 39b due to the waves of the liquid detergent 38 generated when the detergent tank 30 is moved in and out. As a result, it is possible to further suppress the liquid detergent 38 from splashing onto the atmosphere opening 39.

[0141] In addition, the notch 39b can also be provided on the side of the rotating shaft 32 for the arm 33 to be axially supported. At this time, when the liquid level of the liquid detergent 38 is high, the arm 33 moves upward because the float 34 floats on the liquid surface. Therefore, the space between the protrusion 39a and the rotating shaft 32 is separated from the liquid detergent 38 by the protrusion 39a, the rotating shaft 32 and the arm 33. This can prevent the liquid detergent 38 from penetrating into the protrusion 39a from the notch 39b. As a result, it is possible to suppress the liquid detergent 38 from splashing onto the atmosphere opening 39.

[0142] Next, refer to Fig.16 The relationship between arm portion 33 and rotation shaft 32 of detergent tank 30 of the dishwasher will be described.

[0143] Fig.16 It is a diagram schematically showing the relationship between the arm portion 33 and the rotation shaft 32 .

[0144] like Fig.16 As shown, the rotating shaft 32 is formed in a cylindrical shape. The arm 33 has a fitting portion 33a provided at the upper end of the arm 33 and fitting with the cylindrical rotating shaft 32. The fitting portion 33a has a cylindrical shape in which a part of the angular range of the side surface of the fitting portion 33a is missing in the axial direction. Through the notch portion 33b, the user can remove the arm 33 from the rotating shaft 32 and easily clean it. Therefore, it is possible to prevent the liquid detergent 38 from solidifying due to adhesion between the fitting portion 33a and the rotating shaft 32, thereby suppressing the reduction in the function of the float 34. In addition, the interior of the detergent tank 30 can be kept clean in a state without solidified materials. Moreover, when manufacturing the dishwasher, the arm 33 can be easily mounted on the rotating shaft 32. Thereby, the manufacturing cost of the detergent tank 30 can be reduced.

[0145] Furthermore, although the above content has been described by taking the structure in which the arm 33 is moved by rotating around the rotating shaft 32 as an example, it is not limited to this. For example, by moving the float along a guide member provided in the vertical direction, the liquid level of the liquid detergent can also be detected, and it is also possible to obtain a wave-breaking effect. However, in the case of this structure, if a liquid detergent with a high viscosity is used, the sliding resistance between the guide member and the float increases. Therefore, it may be difficult for the float to follow the change in the liquid level. In addition, when the liquid level of the liquid detergent drops, the liquid detergent 38 attached between the guide member and the float may solidify, causing the float to no longer move. Moreover, when the depth of the detergent tank is shallow, the movement range of the float is narrow, so it may not be possible to detect the liquid level in detail.

[0146] Therefore, the dishwasher of this embodiment is configured to support the arm 33 with the rotating shaft 32 disposed above the liquid level of the liquid detergent 38, and to rotate the float 34 according to the liquid level. Thus, the possibility that the float 34 stops moving due to the solidification of the liquid detergent between the rotating shaft 32 and the arm 33 can be reduced. In addition, the float 34 can be displaced in a substantially circular arc shape (including a circular arc shape) in both the horizontal direction and the vertical direction relative to the rotating shaft 32 according to the liquid level, so that the liquid level can be detected more accurately.

[0147] Next, refer to Fig.17A and Fig. 17B The operational relationship between arm 33 and rotation shaft 32 of detergent tank 30 of the dishwasher will be described.

[0148] Fig.17A and Fig. 17B 3 is a diagram schematically showing a cross section of the arm portion 33 and the rotation shaft 32. In detail, Fig.17A The figure shows the cross section of arm portion 33 and rotation shaft 32 when the liquid level of liquid detergent 38 in detergent tank 30 is the highest. Fig. 17B The figure shows the cross section of the arm part 33 and the rotation shaft 32 when the liquid detergent 38 in the detergent tank 30 is emptied.

[0149] like Fig.17A and Fig. 17B As shown, the notch 33b of the arm 33 is configured so that when the arm 33 rotates around the rotation shaft 32 according to the liquid level, the notch 33b is always directed upward relative to the horizontal direction in the entire range of the liquid level of the liquid detergent 38. Thus, the possibility that the liquid detergent 38 splashed from the liquid surface penetrates between the arm 33 and the rotation shaft 32 through the notch 33b and solidifies can be further reduced.

[0150] In addition, in the dishwasher of the present embodiment, the rotating shaft 32 is provided in parallel with the direction in which the washing tank 1 is moved in and out relative to the housing 2. In addition, the float 34 is configured to rotate in a direction orthogonal to the direction in which the washing tank 1 is moved in and out relative to the housing 2. Thus, when the washing tank 1 is moved in and out relative to the housing 2, the waves generated in the direction in which it is moved in and out can be effectively eliminated by the float 34. As a result, it is possible to suppress the liquid detergent 38 from adhering to the atmosphere opening 39, the rotating shaft 32, the fitting portion 33a of the arm 33, etc. In addition, when the detergent tank 30 is moved in and out of the detergent tank storage portion 40, it is also possible to eliminate the waves generated in the direction in which it is moved in and out by the float 34. Thus, it is possible to suppress the liquid detergent from adhering to the atmosphere opening 39, the rotating shaft 32, the fitting portion 33a of the arm 33, etc.

[0151] In addition to the above structure, the following structure may be adopted: the rotation shaft 32 is provided in parallel with the direction in which the detergent tank 30 enters and exits the detergent tank storage unit 40, and the float 34 rotates in a direction orthogonal to the direction in which the detergent tank 30 enters and exits the detergent tank storage unit 40. Thus, when the detergent tank 30 enters and exits the detergent tank storage unit 40, the waves generated in the direction in which the detergent tank 30 enters and exits can be effectively eliminated by the float 34. Therefore, it is possible to suppress the liquid detergent 38 from adhering to the atmosphere opening 39, the rotation shaft 32, the fitting part 33a of the arm 33, etc. Moreover, it is possible to suppress the liquid detergent 38 from spilling from the detergent tank 30 when the user replenishes the liquid detergent to the detergent tank 30. In addition, when the washing tank 1 enters and exits the housing 2, it is possible to eliminate the waves generated in the direction in which the detergent tank 30 enters and exits. Therefore, it is possible to suppress the liquid detergent 38 from adhering to the atmosphere opening 39, the rotation shaft 32, the fitting part 33a of the arm 33, etc.

[0152] Next, refer to Fig.18 The structure of control device 50 of the dishwasher will be described.

[0153] Fig.18 1 is a diagram showing a configuration of control device 50 for controlling the dishwasher according to the embodiment.

[0154] The control device 50 is realized by hardware such as a microcomputer, a microcontroller, or an integrated circuit.

[0155] like Fig.18As shown, the control device 50 includes a step control unit 51, a detection result acquisition unit 52, a liquid level determination unit 53, a detergent tank storage determination unit 54, a conveying control unit 55, a notification unit 56, a standby time acquisition unit 57, a target conveying amount determination unit 58, and a memory 59. These structures are implemented in hardware using a CPU, a memory, or other LSI of any computer. In addition, they are implemented in software using a program loaded in the memory. However, in Fig.18 In the embodiment, the functional blocks realized by cooperation of these functional blocks are illustrated. In addition, those skilled in the art can understand that these functional blocks can be realized in various forms such as only hardware or a combination of hardware and software.

[0156] The step control unit 51 of the control device 50 controls the washing operation of the dishwasher. The step control unit 51 receives the user's instruction from the operation unit 24 of the dishwasher and controls the washing operation according to the instruction. In addition, the step control unit 51 can control in a manner of continuously executing the washing step, the rinsing step, and the drying step, or in a manner of executing only one step. Moreover, the step control unit 51 can also control in a manner of executing a combination of any two or more of the above steps in any order.

[0157] The detection result acquisition unit 52 acquires the detection result from the magnetic sensor 41 as an example of a detection unit. As described above, the magnetic sensor 41 detects the magnetism of the magnetic body 35 provided on the float 34.

[0158] The liquid level determination unit 53 determines the liquid level of the liquid detergent 38 stored in the detergent tank 30 based on the detection result obtained by the detection result acquisition unit 52. At this time, the liquid level determination unit 53 may also determine the position of the magnetic body 35 based on the magnetism detected by a plurality of Hall elements arranged at different positions, thereby determining the liquid level of the liquid detergent 38.

[0159] The detergent tank storage determination unit 54 determines whether the detergent tank 30 is stored in the detergent tank storage unit 40 based on the detection result obtained by the detection result acquisition unit 52. Specifically, when the detection result acquisition unit 52 acquires a detection result indicating that the magnetic sensor 41 detects the magnetism of the magnetic body 35, the detergent tank storage determination unit 54 determines that the detergent tank 30 is stored in the detergent tank storage unit 40. On the other hand, when the detection result acquisition unit 52 acquires a detection result indicating that the magnetic sensor 41 does not detect the magnetism of the magnetic body 35, the detergent tank storage determination unit 54 determines that the detergent tank 30 is not stored in the detergent tank storage unit 40.

[0160] The delivery control unit 55 controls the detergent pump 16, which is an example of a detergent delivery unit, to deliver the liquid detergent 38 stored in the detergent tank 30 to the washing tub 1. Specifically, as described later, the delivery control unit 55 controls the detergent pump 16 to supply the liquid detergent 38 in an amount determined by the target delivery amount determination unit 58 to the washing tub 1. Then, when the delivery of the liquid detergent 38 in an amount determined by the target delivery amount determination unit 58 is completed, the delivery control unit 55 records the delivery completion time in the memory 59.

[0161] In addition, when the detergent tank storage determination unit 54 determines that the detergent tank 30 is not stored in the detergent tank storage unit 40, the delivery control unit 55 controls the detergent pump 16 so as not to deliver the liquid detergent 38 from the detergent tank 30 to the washing tank 1. Thus, it is possible to prevent the washing step from being performed in a state where the detergent is not supplied to the washing tank 1. For example, when air is input into the flow path of the liquid detergent from the detergent tank 30 to the washing tank 1, it is possible that the target delivery amount of detergent is not supplied to the washing tank 1 when the next washing is performed. In this case, the delivery control unit 55 controls the detergent pump 16 so as not to deliver the liquid detergent to the washing tank 1. Thus, it is possible to prevent the washing step from being performed in a state where the detergent is not supplied to the washing tank 1 in an appropriate target delivery amount when the washing is performed next time or later.

[0162] When the detergent tank storage determination unit 54 determines that the detergent tank 30 is not stored in the detergent tank storage unit 40, the notification unit 56 notifies the user of this fact. At this time, the notification unit 56 may notify the user of the fact that the detergent tank 30 is not stored in the detergent tank storage unit 40 by voice, or may notify the user by displaying it on the display unit 25. Thus, even if the user mistakenly starts washing when the detergent tank 30 is not stored in the detergent tank storage unit 40, the user can be prompted to store the detergent tank 30 in the detergent tank storage unit 40 through notification.

[0163] The standby time acquisition unit 57 calculates the time that has passed since the last time the liquid detergent 38 was supplied to the washing tank 1 by the detergent pump 16. Thus, the standby time acquisition unit 57 acquires the standby time that is left without using the detergent pump 16 and the flow path of the liquid detergent. Specifically, the standby time acquisition unit 57 reads the last delivery end time from the memory 59, and calculates the elapsed time from the last delivery end time to the current time as the standby time. In this case, the standby time acquisition unit 57 may also calculate the elapsed time since the last delivery end time by counting using a counting circuit or the like. In addition, the standby time acquisition unit 57 may also acquire information indicating the last delivery end time or the standby time from an external server or the like.

[0164] Generally speaking, Fig.19As shown, if the liquid detergent 38 used in the dishwasher is left for a long time, the viscosity increases (thickens) due to oxidation caused by oxygen in the air.

[0165] Fig.19 This is a graph showing changes in the viscosity of liquid detergent 38 measured by a rotational viscometer with respect to the standing time of liquid detergent 38.

[0166] like Fig.19 As shown in FIG. 1 , the viscosity of the liquid detergent 38 measured after being left for 3 months has slightly increased from the initial value. On the other hand, the viscosity of the liquid detergent 38 measured after being left for 6 months has significantly increased from the initial value. Therefore, in the case where the dishwasher is used again after being left for a long time, the liquid detergent 38 remaining in the flow path including the detergent pump 16 thickens or solidifies, and the flow becomes poor. Therefore, it may be impossible to supply a predetermined amount of detergent to the washing tank 1 using the detergent pump 16.

[0167] Therefore, in the present embodiment, when the standby time is longer than a predetermined threshold value, the target delivery amount of the liquid detergent is increased compared to the prescribed amount. Specifically, the control device 50 increases the driving time, driving frequency, driving voltage, etc. of the detergent pump 16 compared to normal. Thus, the amount of delivery amount decreased due to the thickening of the liquid detergent 38 can be supplemented, thereby supplying an appropriate amount of liquid detergent 38 to the cleaning tank 1.

[0168] The target delivery amount determination unit 58 determines the target delivery amount when the liquid detergent 38 is supplied to the washing tank 1. Specifically, when the standby time acquired by the standby time acquisition unit 57 is shorter than the first threshold value, the target delivery amount determination unit 58 determines the target delivery amount according to the operation mode of the washing step, the type of liquid detergent, the type and amount of the object to be washed, the water temperature, the air temperature and other conditions. On the other hand, when the standby time acquired by the standby time acquisition unit 57 is longer than the first threshold value, the target delivery amount determination unit 58 further adds a predetermined amount to the usual target delivery amount determined as described above. In addition, the additional amount is determined according to the standby time, the season during the standby period, the air temperature, the humidity and other conditions. For example, it is considered that the longer the standby time is, the lower the air temperature or humidity during the standby period is, and the higher the thickening degree of the liquid detergent 38 is. Therefore, in the case of the above-mentioned situation, the target delivery amount determination unit 58 determines to increase the additional amount of the liquid detergent 38. In addition, the above-mentioned first threshold value is, for example, about 3 months.

[0169] Delivery control unit 55 controls detergent pump 16 to deliver the target delivery amount of liquid detergent determined by target delivery amount determination unit 58. Specifically, delivery control unit 55 controls detergent pump 16 by determining the driving time, driving frequency, and driving voltage of detergent pump 16 according to the target delivery amount.

[0170] In addition, when the liquid detergent is not used and is left for a longer time than the first threshold, the target delivery amount determination unit 58 may increase the target delivery amount of the liquid detergent 38 by only once immediately after the elapsed time, or may be a period during which a predetermined number of times is performed after the elapsed time. Moreover, the increased period may be the period during which the liquid detergent stored in the detergent tank 30 is used until the detergent tank 30 is detected to be substantially empty. In other words, it is sufficient to determine which of the above periods is used according to the shelf time. For example, when the shelf time is relatively short, the liquid detergent 38 is delivered once. Thus, it is expected that the thickened liquid detergent 38 remaining in the flow path flows out to the cleaning tank 1. In this case, the target delivery amount determination unit 58 may be determined to increase the target delivery amount only once immediately after the elapsed time. On the other hand, when the shelf time is relatively long, it is considered that multiple deliveries are required until the thickened liquid detergent remaining in the flow path flows out to the cleaning tank 1. In this case, the target delivery amount determination unit 58 may be determined to increase the target delivery amount by a predetermined number of times immediately after the elapsed time. When the storage time is longer, it is considered that the liquid detergent remaining in the detergent tank 30 is further thickened. In this case, the target delivery amount determination unit 58 may determine to increase the target delivery amount until the liquid detergent remaining in the detergent tank 30 is substantially used up. In this case, whether the liquid detergent remaining in the detergent tank 30 is substantially used up can be determined based on the liquid level of the liquid detergent determined by the liquid level determination unit 53.

[0171] The target delivery amount determination unit 58 may also determine the target delivery amount based on the elapsed time since the liquid detergent 38 was stored in the detergent tank 30. That is, when the elapsed time since the liquid detergent 38 was stored in the detergent tank 30 is longer than a predetermined threshold value (equivalent to the first threshold value), the target delivery amount determination unit 58 may determine to increase the target delivery amount in order to compensate for the decrease in the delivery amount due to the thickening of the liquid detergent 38 stored in the detergent tank 30. In this case, the time when the liquid level determination unit 53 determines that the liquid level of the liquid detergent stored in the detergent tank 30 is full is recorded in the memory 59. Then, the target delivery amount determination unit 58 may calculate the elapsed time with reference to the time recorded in the memory 59.

[0172] The target delivery amount determination unit 58 can also determine the target delivery amount based on the liquid level of the liquid detergent 38 determined by the liquid level determination unit 53. Specifically, the target delivery amount determination unit 58 calculates the target liquid level, which is the liquid level obtained by subtracting the cumulative amount of the target delivery amount from the first moment to the second moment from the liquid level determined by the liquid level determination unit 53 at the first moment, and the first moment is, for example, the moment when the liquid level of the liquid detergent is determined to be full by the liquid level determination unit 53. Then, the target delivery amount determination unit 58 calculates the actual liquid level determined by the liquid level determination unit 53 at the second moment. At this time, when the difference between the calculated target liquid level and the actual liquid level is greater than the predetermined value, the target delivery amount determination unit 58 determines that the amount of liquid detergent 38 actually delivered deviates greatly from the target delivery amount. In other words, the target delivery amount determination unit 58 can adjust the target delivery amount according to the difference between the target liquid level and the actual liquid level. In addition, the above-mentioned predetermined value is about 2g. For example, when the target liquid level is higher than the actual liquid level by more than a predetermined value, the target delivery amount is increased. Furthermore, the target transport amount used to calculate the difference between the target liquid level and the actual liquid level may be a value before being increased by the target transport amount determination unit 58 .

[0173] The conveying control unit 55 may also be controlled as follows: when the stand-by time acquired by the stand-by time acquisition unit 57 is longer than the second threshold value, or when the time elapsed since the liquid detergent 38 was stored in the detergent tank 30 is longer than the predetermined threshold value, the liquid detergent stored in the detergent tank 30 is discarded. In this case, the conveying control unit 55 may also be configured to convey all the liquid detergent stored in the detergent tank 30 to the cleaning tank 1, and then supply water into the cleaning tank 1, and discharge the liquid detergent 38 together with the supplied water. At this time, the notification unit 56 is preferably a structure that notifies the user of the intention to discard the liquid detergent. In this way, it is possible to prevent the situation in which the liquid detergent 38 that has been stored in the detergent tank 30 for a long time and may be degraded due to oxidation, etc., is used to clean the object to be cleaned.

[0174] Next, refer to Fig. 20 The steps of the method for controlling the dishwasher are described.

[0175] Fig. 20 1 is a flowchart showing the steps of a method for controlling a dishwasher according to an embodiment of the present invention. Fig. 20 This is a flowchart showing the procedure of determining whether detergent tank 30 is installed before starting the washing step in the dishwasher.

[0176] like Fig. 20As shown, when the control device 50 starts the washing step by using the step control unit 51 (step S10), first, the detection result acquisition unit 52 acquires the detection result from the magnetic sensor 41. Then, the detergent tank storage judgment unit 54 determines whether the detergent tank 30 is stored in the detergent tank storage unit 40 based on the acquired detection result (step S12). At this time, if the detergent tank 30 is not stored in the detergent tank storage unit 40 ("No" in step S12), the user is notified of this by means of the notification unit 56 (step S14). Then, the process returns to step S12 to perform subsequent processing.

[0177] On the other hand, when the detergent tank 30 is stored in the detergent tank storage portion 40 ("Yes" in step S12), the step control unit 51 executes the following steps: Fig.21 The cleaning step (step S16) is shown.

[0178] Next, refer to Fig.21 , the step of supplying liquid detergent 38 until the washing step of the method for controlling the dishwasher will be described in more detail.

[0179] Fig.21 1 is a flowchart showing the steps of a method for controlling a dishwasher according to an embodiment of the present invention. Fig.21 1 is a flowchart showing the steps of supplying liquid detergent 38 until the washing step performed in the dishwasher.

[0180] like Fig.21 As shown, the idle time acquisition unit 57 of the control device 50 first reads the last transport end time from the memory 59 (step S20), and calculates the idle time (step S21).

[0181] Next, it is determined whether the calculated standby time is greater than the second threshold value t2 (step S22). In addition, the second threshold value t2 is, for example, about 6 months. At this time, if the standby time is greater than the second threshold value t2 ("Yes" in step S22), the delivery control unit 55 delivers all the liquid detergent 38 stored in the detergent tank 30 to the cleaning tank 1 (step S24). Furthermore, the delivery control unit 55 supplies water into the cleaning tank 1 and discharges the liquid detergent 38 together with the water (step S26). Then, the cleaning step is skipped and the process ends.

[0182] On the other hand, when the idle time is equal to or less than the second threshold value t2 (No in step S22 ), the target transport amount determination unit 58 determines a normal target transport amount (step S28 ).

[0183] Next, it is determined whether the calculated standby time is greater than the first threshold value t1 (step S28). The first threshold value t1 is, for example, about three months. At this time, if the standby time is greater than the first threshold value t1 ("Yes" in step S30), the target transport amount determination unit 58 increases the target transport amount (step S32) and moves to step S34. On the other hand, if the standby time is less than the first threshold value t1 ("No" in step S30), the target transport amount is not changed and step S32 is skipped.

[0184] Next, the delivery control unit 55 controls the detergent pump 16 to deliver the increased target delivery amount of liquid detergent 38 to the washing tub 1 (step S34). When the delivery is completed, the delivery completion time is recorded in the memory 59 (step S36).

[0185] Thereafter, the step control unit 51 executes a cleaning step (step S38 ).

[0186] After performing the above preamble steps, the dishwashing machine performs a cleaning step.

[0187] Below, refer to Fig.22A and Fig. 22B The structure of detergent tank 30 of still another example of the dishwasher according to the present embodiment will be described.

[0188] Fig.22A and Fig. 22B 2 is a diagram schematically showing the structure of another example of the detergent tank 30. In detail, Fig.22A This is a schematic cross-sectional view of another example of the detergent tank 30 . Fig. 22B This is a schematic side view of another example of detergent tank 30 as viewed from the back side in the inlet and outlet direction.

[0189] like Fig.22A As shown, the detergent tank 30 includes a detergent outlet 71 provided at the bottom end of the side surface on the inner side in the inlet and outlet direction of the detergent tank 30. The detergent outlet 71 is formed in a substantially cylindrical shape (including a cylindrical shape), and a foreign matter capture part 70 is inserted into the cavity inside. The foreign matter capture part 70 captures foreign matter mixed in the detergent tank 30.

[0190] An O-ring 72 is disposed between the foreign matter capturing portion 70 and the detergent discharge port 71. Thus, the foreign matter capturing portion 70 and the detergent discharge port 71 are fixed to each other in a liquid-tight manner.

[0191] Liquid detergent 38 stored in detergent tank 30 flows out from flow path 73 (see FIG. Fig. 22B )discharge.

[0192] The foreign matter trap 70 is formed with the following diameter: the outer diameter of the end inserted into the inner side of the detergent tank 30 is smaller than the inner opening of the detergent discharge port 71, and the outer diameter of the end inserted into the outer side of the detergent tank 30 is larger than the outer opening of the detergent discharge port 71. Thus, the foreign matter trap 70 is inserted from the outer side of the detergent tank 30 into the inner side of the detergent discharge port 71 in a detachable manner. That is, the foreign matter trap 70 is fixed to the detergent discharge port 71 only by the sliding resistance of the O-ring 72. Therefore, if Fig.22A As shown by the arrow, the user can easily remove the foreign matter capture part 70 from the detergent tank 30 by simply pushing the foreign matter capture part 70 from the inside to the outside of the detergent tank 30. In addition, the user can easily install the foreign matter capture part 70 to the detergent tank 30 by simply pushing the foreign matter capture part 70 from the outside of the detergent tank 30 to the detergent outlet 71. Thus, the user can easily remove the foreign matter capture part 70 and can rinse and clean the detergent outlet 71 and its surroundings. In other words, the user can easily remove the foreign matter captured by the foreign matter capture part 70.

[0193] Next, refer to Fig.23 The structure of the foreign matter capturing portion 70 will be described.

[0194] Fig.23 It is a diagram schematically showing a cross section of the foreign matter capturing portion 70 .

[0195] like Fig.23 As shown, the foreign matter capture portion 70 includes: a cover 76 having a substantially cylindrical (including cylindrical) shape; a throttle portion 74 connected to an end of the cover 76 ; and a valve element 80 disposed in a cavity inside the cover 76 .

[0196] The cover 76 has a groove 78 formed near the center of the cover 76 in the longitudinal direction. The above-mentioned O-ring 72 (see Fig.22A ).

[0197] The throttle portion 74 includes a throttle portion opening 75 formed in the vicinity of a connection portion with the cover 76. On the other hand, the cover 76 includes a cover opening 77 formed in the vicinity of a connection portion with the throttle portion 74.

[0198] Liquid detergent 38 stored in detergent tank 30 flows into flow path 73 inside cover 76 via throttle opening 75 and cover opening 77 .

[0199] In addition, the valve core 80 includes a sealing member 82, which is normally biased by a biasing spring 81. Fig.23Thus, the valve core 80 is pressed against the inner side of the groove portion 78 by the sealing member 82. As a result, the valve core 80 and the cover 76 are sealed liquid-tightly by the sealing member 82. Therefore, the liquid detergent 38 is prevented from flowing out of the flow path 73 of the foreign matter capture portion 70.

[0200] Next, refer to Figures 24A to 24D The operation of the foreign matter capturing unit 70 will be described.

[0201] Figures 24A to 24D Schematically shows a state where the foreign matter capture unit 70 is mounted on the detergent discharge port 71. Fig.24A The cross section when the foreign matter trap 70 is attached to the detergent discharge port is shown. Fig. 24B yes Fig.24A A partial enlarged view of the rectangular part of . Fig.24C This is a side view of foreign matter capture portion 70 as viewed from the inside of detergent tank 30 . Fig.24D 1 is a side view of another example of the throttle portion 74 of the foreign matter capture portion 70. Figures 24A to 24D The valve body 80 is shown in the figure in an open state, and the opening and closing of the valve body 80 will be described later.

[0202] like Fig. 24B As shown, the foreign matter trap 70 is configured such that when the foreign matter trap 70 is mounted on the detergent outlet 71, the gap d between the outer side of the main body of the foreign matter trap 70 and the inner opening of the detergent outlet 71 is smaller than the inner diameter of the flow path of the liquid detergent 38 from the throttle opening 75 to the cleaning tank 1. The flow path of the liquid detergent includes the cover opening 77, the flow path between the valve core 80 and the cover 76 when the valve core 80 is open, the flow path 73, the opening outside the detergent outlet 71, the detergent tank storage side detergent discharge path 43, the flow path in the detergent pump 16, the cleaning tank side detergent discharge path 18, and the cleaning tank detergent outlet 17.

[0203] At this time, when the liquid detergent 38 is delivered from the detergent tank 30 to the washing tank 1 by the detergent pump 16 as an example of the detergent delivery unit, foreign matter larger than the gap d in the detergent tank 30 cannot pass through the gap d and thus remains in the detergent tank 30. On the other hand, foreign matter smaller than the gap d and capable of passing through the gap d does not block the middle of the above-mentioned flow path, but flows to the washing tank 1. Thus, it is possible to prevent foreign matter from blocking the flow path of the liquid detergent 38 from the detergent discharge port 71 to the washing tank 1. In addition, by removing the foreign matter capture unit 70, foreign matter that does not pass through the gap d and remains in the detergent tank 30 can be easily washed away.

[0204] That is to say, Fig.24CAs shown, the liquid detergent 38 flows into the foreign matter trap 70 only from the concentric annular gap d formed on the outer periphery of the throttle portion 74, and is discharged from the detergent discharge port 71 of the detergent tank 30. Therefore, as described above, the gap d functions as a foreign matter trap flow path for trapping foreign matter in the detergent tank 30.

[0205] In addition, if Fig.24D As shown, the foreign matter capture part 70 may also be configured to have a hole 83 provided in the throttling part 74 in addition to the gap d. Thus, the liquid detergent 38 can also flow into the interior of the foreign matter capture part 70 from the hole 83. At this time, the diameter of the hole 83 is formed to be smaller than the diameter of the flow path of the liquid detergent from the detergent discharge port 71 to the cleaning tank 1. Therefore, the hole 83 also functions as a flow path for foreign matter capture in the same manner as the above-mentioned gap d. That is, foreign matter larger than the hole 83 cannot pass through the hole 83, and therefore remains in the detergent tank 30. On the other hand, foreign matter that is smaller than the hole 83 and can pass through the hole 83 will not be blocked in the flow path, but will flow to the cleaning tank 1. Thus, it is possible to prevent foreign matter from blocking the flow path of the liquid detergent 38 from the detergent discharge port 71 to the cleaning tank 1. In addition, foreign matter that does not pass through the hole 83 and is attached to the periphery of the hole 83 can be easily removed by removing the foreign matter capture part 70 and washing it.

[0206] As described above, by further providing the hole 83 in the foreign matter capture portion 70, the flow path cross-sectional area of ​​the liquid detergent 38 can be increased. As a result, the pressure loss can be reduced, and the negative pressure generated when the liquid detergent 38 is sucked out by the detergent pump 16 can be reduced. In addition, the hole 83 is used to increase the portion through which the liquid detergent 38 can pass. Therefore, even if a part of the hole 83 is clogged with foreign matter, the influence of the clog can be reduced. As a result, the delivery performance and reliability of the liquid detergent 38 can be well maintained.

[0207] Next, refer to Fig.25 Another example of a state in which detergent tank 30 is stored in detergent tank storage portion 40 will be described.

[0208] Fig.25 This is a diagram schematically showing a cross section of another example when detergent tank 30 is stored in detergent tank storage portion 40 .

[0209] like Fig.25 As shown, the detergent tank storage portion 40 has an elbow 44 constituting a detergent discharge path 43 on the detergent tank storage portion side. The elbow 44 has a rib 45 provided at a top end portion on the detergent tank 30 side.

[0210] When detergent tank 30 is stored in detergent tank storage portion 40 , rib 45 is inserted into flow path 73 of foreign matter trap 70 to push valve element 80 in. Thus, the flow path closed by valve element 80 is opened, and liquid detergent 38 can flow into flow path 73 .

[0211] On the other hand, while detergent tank 30 is removed from detergent tank storage portion 40, valve element 80 is pressed against groove portion 78 by biasing spring 81, thereby closing the flow path between valve element 80 and lid 76. Therefore, liquid detergent 38 stored in detergent tank 30 is prevented from leaking from detergent discharge port 71.

[0212] In addition, in the above embodiment, the structure in which the foreign matter capturing part 70 has a foreign matter capturing flow path (gap d, hole 83) for capturing foreign matter is described as an example, but it is not limited to this. For example, the foreign matter capturing part 70 may also have a filter for capturing foreign matter. In this case, it is preferred that the foreign matter capturing part 70 is provided in a structure that can be removed toward the outside of the detergent tank 30 in the same manner as described above. Thus, the user can easily remove the filter to remove the foreign matter.

[0213] The present disclosure is described above based on the embodiments in the embodiments. The embodiments are examples, and various modifications can be produced in the combination of the components and processing procedures of these embodiments. In addition, those skilled in the art should understand that such modifications are also within the scope of the present disclosure.

[0214] That is, in the above embodiment, the cleaning tank 1 having an opening at the top is described as a structure that can be entered and exited from the housing 2 having a front opening at the front, but the present invention is not limited thereto. For example, a structure in which an opening and closing door of the cleaning tank 1 is provided above the cleaning tank 1 may be provided. In the case of this structure, the cleaning tank 1 may be a structure that can be entered and exited from the housing 2 at the front, or a structure that is fixedly accommodated inside the housing 2.

[0215] In addition, in the above-mentioned embodiment, the dishwasher is stored in the interior of the kitchen as an example, but the present invention is not limited thereto. For example, the dishwasher may be an independent device.

[0216] In the above embodiments, a dishwasher for washing dishes and other objects to be washed is described as an example, but the technology disclosed in the present invention can also be applied to washing machines for washing clothes and other objects to be washed.

Claims

1. A cleaning device, in, The cleaning device has: case; A cleaning tank, which is arranged in the housing and contains objects to be cleaned; a detergent tank for storing liquid detergent to be supplied to the cleaning tank; and a suspension, which is suspended in said liquid detergent, The suspension has a fitting portion that fits with a cylindrical rotating shaft, and the rotating shaft is provided in the detergent tank or in a cover covering an opening of the detergent tank. The fitting portion is a cylindrical shape having a notch portion in which a part of the angular range of the side surface is missing in the axial direction. The notch is configured to face upward relative to a horizontal direction when the suspension rotates about the rotation axis according to a liquid level of the liquid detergent.

2. The cleaning device according to claim 1, in, The cleaning tank can be freely moved in and out relative to the shell.

3. The cleaning device according to claim 1 or claim 2, in, The detergent tank is configured to be able to move in and out of the cleaning tank or the housing.

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