WO2024136363A1 - Lave-vaisselle et son procédé de commande - Google Patents

Lave-vaisselle et son procédé de commande Download PDF

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Publication number
WO2024136363A1
WO2024136363A1 PCT/KR2023/020856 KR2023020856W WO2024136363A1 WO 2024136363 A1 WO2024136363 A1 WO 2024136363A1 KR 2023020856 W KR2023020856 W KR 2023020856W WO 2024136363 A1 WO2024136363 A1 WO 2024136363A1
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WIPO (PCT)
Prior art keywords
detergent
roller
output signal
dishwasher
pump
Prior art date
Application number
PCT/KR2023/020856
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English (en)
Korean (ko)
Inventor
이민혁
이성훈
김대규
Original Assignee
엘지전자 주식회사
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Publication date
Priority claimed from KR1020220179507A external-priority patent/KR20240097451A/ko
Application filed by 엘지전자 주식회사 filed Critical 엘지전자 주식회사
Publication of WO2024136363A1 publication Critical patent/WO2024136363A1/fr

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  • the present invention relates to a dishwasher and a control method thereof.
  • the present invention relates to a dishwasher and a control method thereof, and more specifically, to supply detergent to the tub through a single tube when the pump motor is driven in forward rotation, and to supply air to the detergent container when the pump motor is driven in reverse rotation, It relates to a dishwasher and its control method that can simplify the structure, improve assembly, and reduce manufacturing costs.
  • a dishwasher is a device that sprays washing water such as water to wash dishes and cooking utensils stored inside. At this time, the washing water used for washing may contain detergent.
  • a dishwasher includes a tub that forms a washing space, a storage portion that accommodates cleaning objects inside the tub, a spray arm that sprays washing water into the storage portion, and a sump that stores water and supplies wash water to the spray arm. It is common to be
  • Detergent used for cleaning can be supplied into the tub through a detergent supply device.
  • the detergent supplied into the tub may be mixed with water to generate washing water.
  • a detergent supply device may include a container that stores detergent, and a detergent pump that pumps the detergent stored in the container into the inside of the tub.
  • European Patent Publication No. 3286369 discloses a clothing care machine configured to supply detergent through a tube pump-type detergent pump.
  • the detergent pump of prior art document 001 supplies the first detergent stored in a first container using a first tube, and supplies the second detergent stored in a second container using a second tube, and a plurality of rollers It is configured to rotate while simultaneously pressurizing the tube and the second tube.
  • the detergent pump of prior art document 001 when supplying the first detergent through the first tube, supplies air to the second container through the second tube to restore the pressure inside the second container, and supplies air to the second container through the second tube. 2 When supplying detergent, air is supplied to the first detergent container through the first tube to restore the pressure inside the first container.
  • prior document 001 is highly likely to cause a deviation between the amount of detergent and the amount of air actually supplied due to slip or wear between the roller and the first tube or between the roller and the second tube, so that the first container and the second container There is a problem that the internal pressure cannot be recovered effectively, so there is a high possibility that the load applied to the pump motor will gradually increase.
  • the present invention was devised to solve the problems of the prior art described above, and is configured to supply detergent to the tub through a single tube when the pump motor is driven in forward rotation, and to supply air to the detergent container when the pump motor is driven in reverse rotation.
  • the first purpose is to provide a dishwasher and a control method thereof that have a simplified structure, improved assembly, and reduced manufacturing costs.
  • the present invention provides a dishwasher and a control method thereof configured to allow air to be supplied back to the detergent container in response to the actual supply amount of detergent, so that the internal pressure of the detergent container can be effectively recovered.
  • a dishwasher and a control method thereof configured to allow air to be supplied back to the detergent container in response to the actual supply amount of detergent, so that the internal pressure of the detergent container can be effectively recovered.
  • a dishwasher includes a tub in which a washing space is formed; a detergent supply device including a container having a detergent storage space in which detergent to be provided to the washing space is accommodated, and a detergent pump supplying the detergent stored in the container to the washing space; and a control unit that drives the detergent pump, wherein the container includes a vent that communicates the detergent storage space with the outside, and a membrane that blocks the vent and changes the internal pressure of the detergent storage space.
  • the detergent pump includes a pump motor that generates a driving force that rotates in the forward and reverse directions, and the control unit drives the pump motor in the forward direction to supply a preset amount of detergent; And when the supply of the preset amount of detergent is completed, driving the pump motor in the reverse direction to restore the internal pressure of the detergent storage space.
  • the detergent pump includes a tube that guides the detergent discharged from the container to the washing space, a roller that pressurizes the tube and moves the detergent inside the tube while rotating around the rotation axis, and the roller It further includes a roller sensor that detects the position of the roller and generates an output signal corresponding to the position of the roller, and the step of supplying the preset amount of detergent includes, when the forward driving of the pump motor starts, the roller sensor calculating the number of rotations of the roller in the forward direction through; And it may include comparing the calculated number of forward revolutions with a preset number.
  • calculating the number of forward revolutions of the roller through the roller sensor includes receiving an output signal including either a first output signal or a second output signal from the roller sensor; determining whether the received output signal initially changes from the first output signal to the second output signal, or changes from the second output signal to the first output signal; When it is determined that an initial change in the output signal has occurred, determining an initial change state of the output signal; After determining the first change state, determining whether a change in the output signal identical to the first change state occurs; If it is determined that a change in the output signal that is the same as the initial change has occurred, the step of updating the number of forward signal changes by increasing it by one and storing the updated number of forward signal changes may be included.
  • the number of forward signal changes may be the number of forward revolutions of the roller.
  • the step of supplying the preset amount of detergent may further include determining that the supply of the preset amount of detergent has been completed when it is determined that the calculated number of forward revolutions has reached the preset number.
  • control unit may further perform the step of stopping the operation of the pump motor.
  • the first output signal includes a signal containing information that the roller is within the detection range of the roller sensor
  • the second output signal includes information that the roller is located outside the detection range of the roller sensor. It may include a signal containing .
  • the first change state is either a first change state that changes from the first output signal to the second output signal, or a second change state that changes from the second output signal to the first output signal. It can be.
  • control unit may further perform the step of additionally re-receiving the output signal from the roller sensor after determining the initial change state of the output signal.
  • the detergent pump includes a tube that guides the detergent discharged from the container to the washing space, a roller that pressurizes the tube and moves the detergent inside the tube while rotating around the rotation axis, and the roller Further comprising a roller sensor for detecting the position of the roller and generating an output signal corresponding to the position of the roller, wherein the step of restoring the internal pressure of the detergent storage space includes, when the reverse driving of the pump motor is initiated, calculating the number of reverse revolutions of the roller through a roller sensor; And it may include comparing the calculated number of reverse revolutions with a preset number.
  • calculating the number of reverse rotations of the roller through the roller sensor includes receiving an output signal including either a first output signal or a second output signal from the roller sensor; determining whether a change state of the received output signal opposite to an initial change state of the output signal is detected; If it is determined that a change in the output signal opposite to the initial change has occurred, updating the reverse signal change count by increasing it by one and storing the updated reverse signal change count; and comparing the updated reverse signal change count with the preset count.
  • the number of reverse signal changes may be the number of reverse rotations of the roller.
  • the step of recovering the internal pressure of the detergent storage space may further include the step of driving the pump motor in the reverse direction so that the roller rotates in the reverse direction before receiving the output signal.
  • the step of recovering the internal pressure of the detergent storage space further includes determining that the internal pressure of the detergent storage space has been recovered when it is determined that the updated number of reverse signal changes has reached the preset number. It can be included.
  • control unit may further perform the step of stopping the operation of the pump motor.
  • the method of controlling a dishwasher includes a tub having a washing space formed therein; and a detergent supply device including a container having a detergent storage space in which detergent to be provided to the washing space is accommodated, and a detergent pump supplying the detergent stored in the container to the washing space, wherein the container includes the detergent. It has a vent that communicates the storage space with the outside, and a membrane that blocks the vent and varies in response to the internal pressure of the detergent storage space, and the detergent pump includes a pump motor that generates a driving force to rotate in the forward and reverse directions.
  • a control method of a dishwasher comprising: driving the pump motor in a forward direction to supply a preset amount of detergent; And when the supply of the preset amount of detergent is completed, driving the pump motor in the reverse direction may include recovering the internal pressure of the detergent storage space.
  • the detergent pump includes a tube that guides the detergent discharged from the container to the washing space, a roller that pressurizes the tube and moves the detergent inside the tube while rotating around the rotation axis, and the roller It further includes a roller sensor that detects the position of the roller and generates an output signal corresponding to the position of the roller, and the step of supplying the preset amount of detergent includes, when the forward driving of the pump motor starts, the roller sensor calculating the number of rotations of the roller in the forward direction through; And it may include comparing the calculated number of forward revolutions with a preset number.
  • the dishwasher and its control method according to the present invention are configured to supply detergent to the tub through a single tube when the pump motor is driven in forward rotation, and to supply air to the detergent container when the pump motor is driven in reverse rotation, so the structure is simplified and , assembly is improved and manufacturing costs are reduced.
  • the dishwasher and its control method according to the present invention are configured to allow air to be supplied back to the detergent container in response to the actual amount of detergent supplied, so that the internal pressure of the detergent container can be effectively restored.
  • Figure 1 is a front perspective view of a dishwasher according to an embodiment of the present invention.
  • Figure 2 is a schematic cross-sectional view of the dishwasher shown in Figure 1.
  • Figure 3a is a rear perspective view showing a detergent supply device according to an embodiment of the present invention attached to the rear panel of a door
  • Figures 3b and 3c are exploded perspective views of Figure 3a.
  • Figures 4 and 5 are a rear perspective view and a front perspective view showing the detergent supply device in a closed state with the door shown in Figure 3.
  • Figure 6 is an exploded perspective view of Figure 4
  • Figure 7 is an exploded perspective view of Figure 5.
  • Figure 8 is a rear perspective view of the detergent pump shown in Figure 6.
  • Figures 9 and 10 are an exploded rear perspective view and an exploded front perspective view of Figure 8.
  • FIG. 11A is a front perspective view of the housing shown in FIGS. 6 and 7, and FIGS. 11B and 11C are partially enlarged views of the housing shown in FIGS. 6 and 7.
  • FIG. 12 is a cross-sectional view of the housing shown in FIG. 11A taken along line 12-12.
  • FIG. 13 is a cross-sectional view of the housing shown in FIG. 11A taken along line 13-13.
  • Figure 14 is a partial enlarged view showing the case removed from the detergent pump shown in Figure 8.
  • FIG. 15 is an exploded perspective view for explaining the relationship between the carrier and a plurality of rollers in the configuration shown in FIG. 14.
  • FIG. 16 is a cross-sectional view of the first roller shown in FIG. 15 cut along the longitudinal direction.
  • FIGS. 17 and 18 are cross-sectional views taken along the transverse direction of the plurality of rollers when the carrier shown in FIG. 12 is combined with the plurality of rollers.
  • Figure 19 is a partially enlarged view showing a state in which the first roller is within the detection range of the roller sensor.
  • FIG. 20 is a partially enlarged view showing a state in which the first roller rotates from the state of FIG. 19 and is out of the detection range of the roller sensor.
  • Figure 21 is a rear view of the detergent container shown in Figure 6.
  • FIG. 22 is a cross-sectional view of the detergent container shown in FIG. 21 taken along line 3-3.
  • Figure 23 is a cross-sectional view showing a state in which the internal pressure of the detergent container is lowered as detergent is supplied through the detergent pump from the state shown in Figure 22.
  • Figure 24 is a cross-sectional view showing a state in which the pressure inside the detergent container is recovered as air is introduced through the detergent pump from the state shown in 23.
  • Figure 25 is a functional block diagram for explaining the configuration of a control unit of a dishwasher according to an embodiment of the present invention.
  • FIGS 26 to 28 are flow charts for explaining control steps performed by the control unit shown in Figure 25.
  • first, second, etc. are used to describe various components, these components are of course not limited by these terms. These terms are only used to distinguish one component from another component, and unless specifically stated to the contrary, the first component may also be a second component.
  • top (or bottom) of a component or the arrangement of any component on the “top (or bottom)” of a component means that any component is placed in contact with the top (or bottom) of the component. Additionally, it may mean that other components may be interposed between the component and any component disposed on (or under) the component.
  • each component when a component is described as being “connected,” “coupled,” or “connected” to another component, the components may be directly connected or connected to each other, but the other component is “interposed” between each component. It should be understood that “or, each component may be “connected,” “combined,” or “connected” through other components.
  • Figure 1 is a front perspective view showing a dishwasher according to the present invention
  • Figure 2 is a simplified cross-sectional view briefly showing the internal structure of the dishwasher according to the present invention.
  • the dishwasher 1 includes a case 10 forming the outer shape, and a washing machine installed inside the case 10 and washing objects.
  • a tub 20 that forms a space 21 and has an open front, a door 30 that opens and closes the open front of the tub 20, and washing water for washing objects located in the lower part of the tub 20.
  • a driving unit 40 that supplies, collects, circulates, and drains water, a storage unit 50 that is detachably provided in the internal washing space 21 of the tub 20 and where a cleaning object is placed, and a storage unit 50. It is installed adjacent to and is provided with a spray part 60 that sprays washing water for washing the cleaning object.
  • the object to be washed seated in the storage unit 50 may be, for example, dishes such as bowls, plates, spoons, and chopsticks, and other cooking utensils.
  • dishes such as bowls, plates, spoons, and chopsticks, and other cooking utensils.
  • objects to be washed will be referred to as dishes.
  • the tub 20 may be formed in a box shape with an entirely open front, and corresponds to a configuration known as a so-called washing tank.
  • a washing space 21 is formed inside the tub 20, and the open front can be opened and closed by the door 30.
  • the tub 20 may be formed through press processing of a metal plate resistant to high temperature and moisture, for example, a stainless steel plate.
  • a plurality of brackets are disposed for the purpose of supporting and installing functional components such as the storage portion 50 and the spray portion 60, which will be described later, within the tub 20. It can be.
  • the driving unit 40 includes a sump 41 that stores washing water, a sump cover 42 that separates the sump 41 from the tub 20, and a water supply unit that supplies washing water to the sump 41 from the outside. (43), a drain unit 44 for discharging the washing water of the sump 41 to the outside, a water pump 45 and a supply passage 46 for supplying the washing water of the sump 41 to the spray unit 60. It may be configured to include.
  • the sump cover 42 is disposed on the upper side of the sump 41 and may serve to distinguish the tub 20 and the sump 41. Additionally, the sump cover 42 may be provided with a plurality of recovery holes for recovering the washing water sprayed into the washing space 21 through the spray unit 60 to the sump 41.
  • the washing water sprayed from the spray unit 60 towards the dishes falls to the bottom of the washing space 21 and can be recovered back to the sump 41 through the sump cover 42.
  • the water pump 45 is provided on the side or bottom of the sump 41 and serves to pressurize the washing water and supply it to the spray unit 60.
  • the water pump 45 may be connected to the sump 41 and the other end may be connected to the supply passage 46.
  • the water pump 45 may be equipped with an impeller 451 and a motor 453. When power is supplied to the motor 453, the impeller 451 rotates, and the washing water in the sump 41 is pressurized and can be supplied to the spray unit 60 through the supply passage 46.
  • the supply passage 46 may serve to selectively supply the washing water supplied from the water pump 45 to the spray unit 60.
  • the supply passage 46 includes a first supply passage 461 connected to the lower injection arm 61, a second supply passage 463 connected to the upper injection arm 62, and the top nozzle 63. This can be done, and the supply passage 46 may be provided with a supply passage switching valve 465 that selectively opens and closes the supply passages 461 and 463.
  • the supply passage switching valve 465 may be controlled to open each of the supply passages 461 and 463 sequentially or simultaneously.
  • the spray unit 60 is provided to spray washing water on dishes stored in the storage unit 50, etc.
  • the spray unit 60 is located at the bottom of the tub 20 and is located between the lower spray arm 61 that sprays washing water to the lower rack 51, and the lower rack 51 and the upper rack 52.
  • An upper spray arm (62) is located at the top of the tub (20) and sprays wash water to the lower rack (51) and upper rack (52), and sprays wash water to the top rack (53) or upper rack (52). It may include a top nozzle 63.
  • the lower spray arm 61 and the upper spray arm 62 are rotatably provided in the washing space 21 of the tub 20 and can spray washing water while rotating toward the dishes in the storage unit 50.
  • the lower spray arm 61 may be rotatably supported on the upper side of the sump cover 42 so that it can spray washing water while rotating toward the lower rack 51 from the bottom of the lower rack 51.
  • the upper spray arm 62 may be rotatably supported by the spray arm holder 467 so that it can spray washing water while rotating between the lower rack 51 and the upper rack 52.
  • the lower surface 25 of the tub 20 may be further provided with means for diverting the washing water sprayed from the lower spray arm 61 to the upward direction (U-direction) in order to increase washing efficiency.
  • the washing space 21 may be provided with a storage unit 50 for storing dishes.
  • the storage unit 50 is provided to be withdrawn from the inside of the tub 20 through the open front of the tub 20 .
  • a lower rack 51 is located at the lower part of the tub 20 and can accommodate relatively large dishes
  • an upper rack 51 is located on the upper side of the lower rack 51 and can accommodate medium-sized dishes.
  • An embodiment is shown in which a storage unit including a rack 52 and a top rack 53 located at the top of the tub 20 and capable of storing small dishes, etc. is shown.
  • the present invention is not limited to this, but will be described based on an embodiment of a dishwasher provided with three storage units 50 as shown.
  • These lower racks 51, upper racks 53, and top racks 53 may each be configured to pass through the open front of the tub 20 and be drawn out.
  • guide rails may be provided on both walls forming the inner peripheral surface of the tub 20.
  • the guide rails may include an upper rail, a lower rail, and a top rail.
  • Wheels may be provided below the lower rack 51, upper rack 53, and top rack 53, respectively.
  • the user can store dishes in the lower rack 51, upper rack 53, and top rack 53 by pulling them out through the front of the tub 20, or easily remove washed dishes from them. You can take it out.
  • the guide rail 54 is a fixed guide rail in the form of a simple rail for guiding the withdrawal and insertion of the injection unit 60, or guides the withdrawal and storage of the injection unit 60, and the withdrawal distance according to the withdrawal of the injection unit 60. It can be provided as a telescopic guide rail that increases.
  • the door 30 has the purpose of opening and closing the open front of the tub 20 described above.
  • a hinge part (not shown) for opening and closing the door 30 is provided at the lower part of the normally open front, and the door 30 can be opened by rotating around the hinge part as a rotation axis.
  • a handle for opening the door 30 and a control panel for controlling the dishwasher 1 may be provided on the outer surface of the door 30.
  • control panel includes a display that visually displays information about the current operating status of the dishwasher, a selection button that inputs the user's selection operation, and a user operation that inputs the user's operation to turn the power on and off of the dishwasher.
  • a button unit including a power button, etc. may be provided.
  • the rear panel forming the inner surface of the door 30 forms one side of the tub 20 when the door 30 is closed and at the same time forms the lower rack of the storage unit 50 when the door 30 is fully opened.
  • (51) can form a seating surface that can be supported.
  • the rear panel of the door 30 forms a horizontal plane in the same direction in which the guide rail 54 along which the lower rack 51 is guided extends.
  • detergent for cleaning objects is stored in the rear panel of the door 30, and a detergent supply device is provided to automatically supply an appropriate amount of detergent during the cleaning process. can be placed.
  • the appropriate amount of detergent can be determined depending on the cleaning load, that is, the total amount of objects to be cleaned.
  • composition of the detergent supply body will be described later with reference to FIG. 3A and below.
  • an automatic door opening module 352 may be provided on the outside of the upper surface of the tub 20 to automatically open the door.
  • the automatic door opening module 352 may be provided with a push rod 3524 that rotates the rear top of the door 30 to the open position.
  • a drying wind supply unit 80 may be provided at the lower part of the tub 20 to generate and supply high-temperature or low-temperature drying wind to the washing space inside the tub 20.
  • the dry air supply unit 80 includes a filter member 883 that filters external air, a blowing fan 825 that generates a dry wind airflow, a heater 84 that heats the dry wind airflow, and a tub. It is disposed inside and may be configured to include an airflow guide 83 that guides the drying wind airflow.
  • a dry wind supply hole 254 may be provided on the lower surface of the tub 20 to allow high-temperature dry wind generated by the dry wind supply unit to be introduced into the interior of the tub 20.
  • the detergent supply device 200 provided in the dishwasher 1 may be placed and attached to the door 30.
  • the door 30 is coupled to the front panel 30a, which forms the front of the dishwasher 1, and is arranged to face the inside of the tub 20. and may include a rear panel (30b) forming the rear of the door (30).
  • the detergent supply device 200 may be coupled to the rear panel 30b forming the rear of the door 30.
  • a concave portion that is recessed toward the front panel (30a) may be formed in the lower portion of the rear panel (30b), and no concave portion may be formed in the upper portion of the rear panel (30b). Accordingly, the upper portion of the rear panel 30b may form a rear protruding surface 30b1 that protrudes more toward the rear than the upper portion.
  • the front-to-back width of the detergent supply device 200 needs to be significantly large.
  • the detergent supply device 200 can be coupled to the upper rear protruding surface 30b1 of the rear panel 30b where no concave portion is formed.
  • the detergent supply device 200 may partially extend into the interior of the door 30 through the rear panel 30b.
  • a through hole 30b2 through which the detergent supply device 200 partially passes may be formed in the rear protruding surface 30b1 of the rear panel 30b.
  • the shape of the through hole 30b2 may be approximately a square hole shape corresponding to the external shape of the detergent supply device 200.
  • the rear part of the detergent supply device 200 is exposed to the washing space 21 of the tub 20, and the front part of the detergent supply device 200 is exposed to the rear panel ( It may pass through 30b) and be placed inside the door 30.
  • electrical components such as an electrically operated detergent pump 230 and a roller sensor 2391 may be placed at the front of the detergent supply device 200 disposed inside the door 30.
  • the electrical components constituting the detergent supply device 200 can be configured so that they are not affected by the washing water.
  • a number of electrically operated parts may be accommodated inside the door 30.
  • a water leak prevention means may be provided between the detergent supply device 200 and the rear panel 30b of the door 30.
  • the door 30 is rotatably supported through the hinge bracket 37 disposed at the bottom of the door 30, and can be rotated around the hinge bracket 37.
  • the detergent supply device 200 When the door 30 is closed, the detergent supply device 200 may be arranged to face the inside of the washing space 21 and may be arranged in a vertical direction. In this way, when the detergent supply device 200 is arranged in the vertical direction, the detergent stored inside the detergent container 280, which will be described later, may flow downward according to gravity.
  • the detergent supply device 200 can be rotated in a direction away from the tub 20 and can be arranged in a horizontal direction when it is fully opened.
  • the user opens the door 30 and arranges the detergent supply device 200 in the horizontal direction, then opens the cover 220, which will be described later, to install the detergent container 280 inside the housing 210 or to install the detergent container 280 inside the housing 210. It can be easily removed from.
  • the detergent supply device 200 may be configured to include a housing 210 having a predetermined receiving space therein, and a cover 220 that opens and closes the receiving space of the housing 210.
  • the housing 210 forms the exterior of the detergent supply device 200 and serves to accommodate or support other parts constituting the detergent supply device 200.
  • the housing 210 may be formed to have a box shape with an entirely open rear surface 210a so that a predetermined receiving space can be formed therein.
  • a detergent container 280 which will be described later, can be installed or removed by passing through the open rear side 210a.
  • a cover 220 which will be described later, can be coupled to the open rear surface 210a, and the rear surface 210a can be closed by the cover 220.
  • the front-to-back width of the upper portion of the housing 210 may be made much larger than the front-to-back width of the lower portion.
  • an electrically operated detergent pump 230 and a water level sensor 240 are installed on the outside of the rear 210a of the housing 210, as described later. , and a space and support structure to which the attachment and detachment detection sensor 260 can be attached and supported can be formed.
  • a predetermined shape is provided at the bottom of the rear surface 210a of the housing 210.
  • a plurality of support ribs 214 may be formed integrally with the housing 210. At this time, the support rib 214 passes through the through hole 30b2 of the rear panel 30b and is embedded in the interior of the door 30. Therefore, in consideration of assembly, the support rib 214 may be formed so as not to extend to the outside of the housing 210 beyond the both side surfaces 210e and 210f and the lower surface 210d of the housing 210.
  • the detergent supply device 200 of the dishwasher 1 may be configured to supply a single detergent or different detergents.
  • the housing 210 may be formed to have an approximately symmetrical shape so that it can be commonly used for supplying a single detergent and supplying different detergents.
  • the housing 210 When applied to supply heterogeneous detergents, the housing 210, which has a left-right symmetrical shape, is divided into left and right directions (Le-Ri direction), and the right side of the housing 210 is used for supplying the first detergent, and the housing ( The left part of 210) can be used for supplying the second detergent.
  • components other than the housing 210 are used for supplying a single detergent.
  • the present invention is not limited to this, but will be described below based on an embodiment in which the housing 210 is applied to the detergent supply device 200 for supplying a single detergent as shown.
  • the detergent supply device 200 arranged vertically as described above, a portion of the housing 210 is exposed to the washing space 21 of the tub 20, and the remaining portion of the housing 210 is exposed to the door (
  • the detergent supply device 200 may be installed on the rear panel 30b of the door 30 while being embedded inside the door 30.
  • the housing 210 may have a shape that is divided along the front-to-back direction (F-R direction) around the virtual reference line L shown in FIG. 5.
  • the portion of the housing 210 corresponding to the rear with respect to the virtual reference line (L) is exposed to the washing space 21 and can be referred to as the exposed portion 211, and the portion corresponding to the rear with respect to the virtual reference line (L) may be referred to as the exposed portion 211.
  • the portion of the housing corresponding to is embedded in the interior of the door 30, it may be referred to as the embedded portion 212.
  • the cross-sectional area of the exposed portion 211 may be formed to be larger than the cross-sectional area of the buried portion 212.
  • a predetermined step surface 213 may be formed at the rear end of the buried part 212 and the front end of the exposed part 211, which correspond to the boundary between the exposed part 211 and the embedded part 212.
  • the step surface 213 serves to increase the contact area or coupling area with the rear panel 30b when the door 30 is fastened to the rear panel 30b.
  • the step surface 213 may be configured to have a shape corresponding to the shape of the back of the rear panel 30b.
  • fastening holes through which a fastening means such as a screw bolt can pass may be formed at each of the four corners of the step surface 213 at the top, bottom, left, and right.
  • the rear panel ( 30b) Water leak prevention means may be provided between.
  • a gasket 270 may be provided, which is interposed between the step surface 213 and the rear panel 30b of the door 30 and is made of a material having a predetermined elasticity.
  • the gasket 270 is coupled to the step surface 213 and may be formed to have a shape corresponding to the shape of the step surface 213 .
  • the gasket 270 is configured to have a width corresponding to the width of the step surface 213, and may have a thickness sufficient to provide a predetermined elastic force.
  • the cover 220 is detachably connected to the housing 210 and serves to open and close the open rear portion 210a of the housing 210.
  • the cover 220 may be configured to rotate to open and close the internal accommodation space of the housing 210.
  • the cover body 221 may have a size that entirely covers the rear 210a of the housing 210.
  • the lower end of the cover body 221 may be rotatably connected to the housing 210.
  • a fastening portion 222 may be provided at the top of the cover body 221 as a means for providing a detachable connection to the housing 210.
  • the fastening part 222 may include a lever extending upward from the top of the cover body 221, and a fastening tab integrally connected to the lever and extending in the horizontal direction.
  • a locking protrusion to which a fastening tab is elastically coupled may be provided on the upper surface 210c near the rear 210a of the housing 210.
  • the user can easily release the jammed state between the fastening protrusion and the locking protrusion by pulling the lever in a direction away from the housing 210.
  • a through hole 223 may be formed in the cover body 221 that extends along the vertical direction (U-D) and whose width in the left and right directions is maintained approximately constant.
  • the through hole 223 may be formed at a position corresponding to the transparent window 2813 of the detergent container 280, which will be described later.
  • the user can easily check the level and remaining amount of detergent stored inside the detergent container 280 with the naked eye through the hole 223 of the cover 220 and the transparent window 2813 of the detergent container 280.
  • the detergent supply device 200 may further include a detergent container 280 inside which detergent to be supplied to the washing space 21 of the tub 20 is stored.
  • the container body 281 of the detergent container 280 may have a container shape with a predetermined detergent storage space formed therein.
  • the detergent container 280 is entirely accommodated in the internal accommodation space of the housing 210, and may have an external shape corresponding to the shape of the internal accommodation space of the housing 210 of the container body 281. .
  • An inlet 2811 for detergent replenishment may be formed at the rear center of the container body 281.
  • a sealing cap 283 may be detachably coupled to the inlet 2811. Therefore, the user can separate the sealing cap 283 from the inlet 2811 to open the inlet 2811 and replenish detergent through the inlet 2811.
  • a sealing ring 284 made of a material with a certain elasticity may be added between the inlet 2811 and the sealing cap 283 to prevent the leakage of detergent.
  • a ventilation hole 2812 formed through the rear of the container body 281 may be provided at the upper rear side of the container body 281.
  • the ventilation hole 2812 is used to compensate for the phenomenon in which the pressure of the internal storage space becomes lower than atmospheric pressure as detergent supply progresses.
  • detergent leak prevention means such as an air valve or membrane may be added to the vent 2812.
  • a transparent window 2813 corresponding to the through hole 223 of the cover 220 may be formed on the rear of the container body 281.
  • the transparent window 2813 may be made of a transparent or translucent material capable of transmitting visible light.
  • a detergent discharge port 2814 may be formed at the front lower side of the container body 281.
  • the detergent discharge port 2814 may be placed at the bottom of the container body 281 so that the detergent can be easily moved by gravity.
  • a pair of detergent discharge ports 2814 are provided on the left and right sides of the front of the container body 281, but this is to enable common use as a detergent container 280 for supplying heterogeneous detergents.
  • the detergent outlet 2814 on the left side may be closed.
  • a container valve 282 may be coupled to the detergent outlet 2814.
  • the container valve 282 closes the detergent outlet 2814 when the container body 281 is removed and separated from the housing 210, and the detergent outlet 2814 is closed when the container valve 282 is mounted on the housing 210. It plays a role in opening (2814).
  • a valve coupling portion 215 to which the container valve 282 is coupled may be formed inside the housing 210 when the detergent container 280 is mounted.
  • the container valve 282 When the container valve 282 is coupled to the valve coupling portion 215 of the housing 210, the container valve 282 opens at the same time as the coupling, thereby opening the detergent outlet 2814.
  • the container valve 282 exemplarily includes a valve body 2821 whose front end 2821a and rear end 2821b are at least partially open, respectively, and a valve.
  • a plug 2822 that is movable in the front-back direction inside the main body 2821 and opens and closes the open portion of the front end 2821a of the valve body 2821, and a spring that provides restoring force to the plug 2822 ( (not shown) may be included.
  • valve body 2821 has a cylindrical outer shape, and an internal passage through which detergent can flow may be formed inside.
  • the internal passage communicates with an open portion formed at the front end 2821a of the valve body 2821 and an open portion formed at the rear end 2821b.
  • the rear end (2821b) of the valve body (2821) can be firmly coupled to the detergent outlet (2814) of the container body (281). Accordingly, the detergent supplied from the container body 281 is introduced through the open portion of the rear end 2821b of the valve body 2821 and can flow along the internal passage of the valve body 2821.
  • the front end 2821a of the valve body 2821 may be coupled to the valve coupling portion 215 of the housing 210 (see FIG. 12).
  • the detergent flowing along the internal passage of the valve body 2821 can be discharged through the open portion of the front end 2821a of the valve body 2821 and supplied to the valve coupling portion 215 of the housing 210. can,
  • the plug 2822 is disposed inside the valve body 2821 and serves to open and close the open portion of the front end 2821a of the valve body 2821.
  • the plug 2822 may have a shape corresponding to the open portion of the front end 2821a of the valve body 2821.
  • the plug 2822 is pressed by a spring (not shown) in the direction of closing the open portion of the front end 2821a of the valve body 2821.
  • the front end surface of the plug 2822 may be integrally provided with at least one contact protrusion 2822a that protrudes in a direction away from the valve body 2821.
  • the contact protrusion 2822a may be formed to protrude farther from the container body 281 than the front end surface of the plug 2822 and the front end 2821a of the valve body 2821.
  • the contact protrusion 2822a of the plug 2822 first contacts the end surface of the valve coupling portion 215.
  • the container body 281 continues to be mounted on the housing 210, the relative movement of the front end 2821a of the valve body 2821 may continue while the movement of the plug 2822 is blocked. .
  • a gap occurs between the plug 2822 and the open portion of the front end 2821a of the valve body 2821, and the gap may gradually expand. .
  • the container valve 282 can be converted from a closed state to an open state.
  • detergent can flow from the container valve 282 to the valve coupling portion 215, and detergent can be supplied from the container body 281.
  • the contact protrusion 2822a of the plug 2822 may be separated from the end surface of the valve coupling portion 215.
  • the clearance between the plug 2822 and the open portion of the front end 2821a of the valve body 2821 can be immediately released by the restoring force of the spring described above, and the valve body 2821 returns to the closed state. It becomes possible.
  • At least one stopper 2821c for determining the insertion depth and insertion position into the detergent discharge port 2814 of the container body 281 may be integrally provided on the outer peripheral surface of the valve body 2821.
  • a sealing ring may be additionally provided on the front end 2821a of the valve body 2821 to prevent leakage of detergent between the inner peripheral surface of the valve coupling portion 215 and the valve body 2821.
  • this configuration of the container valve 282 is only illustrative, and is in a closed state when removed from the housing 210, and can be converted to an open state when mounted on the housing 210, without limitation. Applicable to the present invention.
  • a detachment detection sensor 260 may be attached to the housing 210 as a means for detecting the state in which the detergent container 280 is mounted or removed from the housing 210.
  • the detachment detection sensor 260 is disposed in the embedded portion 212 of the housing 210 so as not to be affected by the washing water, and is located at the lower part of the front 210b of the housing 210 as shown by way of example. It can be attached in a position close to the left side.
  • the detachment detection sensor 260 may have a Hall sensor type that detects magnetic force.
  • the container body 281 is provided with a magnetic material (not shown) that emits a predetermined magnetic force at a position corresponding to the position of the attachment/detachment detection sensor 260 when the detergent container 280 is mounted on the housing 210. It can be.
  • the detachment detection sensor 260 is electrically connected to the control unit 100, which will be described later, and the output signal of the detachment detection sensor 260 can be transmitted to the control unit 100.
  • the control unit 100 can easily determine whether the detergent container 280 is mounted on the housing 210 or has been removed from the housing 210 through the received output signal of the attachment/detachment detection sensor 260.
  • a water level sensor 240 may be attached to the housing 210 as a means to check the remaining amount of detergent stored inside the container body 281.
  • the water level sensor 240 is disposed in the embedded part 212 of the housing 210 so as not to be affected by washing water, and as exemplarily shown, is located in the center at the lower front of the housing 210. Can be attached to the side.
  • the water level sensor 240 may be provided in the form of a Hall sensor that detects magnetic force.
  • a floater (not shown) may be disposed inside the container body 281 to be movable in the up and down directions (U-D) depending on the level of detergent.
  • a magnetic material that emits a predetermined magnetic force may be attached to the plotter, and the detachment detection sensor 260 may generate an output signal corresponding to the strength of the magnetic force emitted from the magnetic material of the plotter.
  • the water level sensor 240 is electrically connected to the control unit 100, which will be described later, and the output signal of the water level sensor 240 can be transmitted to the control unit 100.
  • the control unit 100 can easily determine the remaining amount of detergent stored inside the container body 281 through the output signal of the received water level sensor 240.
  • the detergent supply device 200 may further include a detergent pump 230 for providing detergent stored in the detergent container 280 to the washing space 21 of the tub 20.
  • the detergent pump 230 may be provided in the form of a tube pump driven by an electric motor to facilitate control of the amount of detergent supplied.
  • a tube pump may be configured to pump a flexible tube with a detergent movement passage inside by pressing it through at least one roller to push and move the detergent.
  • FIG. 4 to 7 illustrate a configuration in which a single detergent pump 230 is provided for supplying a single detergent, but when applied for supplying different detergents, a detergent pump 230 with the same specifications is added. It can be provided with .
  • the detergent pump 230 is installed in the embedded portion 212 of the housing 210 so that the electrically operated detergent pump 230 is not affected by the washing water. It is disposed, and may be installed and fixed to the support rib 214 formed on the front lower part of the housing 210.
  • the detergent pump 230 is equipped with a roller sensor 2391 that detects the position of the roller 233 that moves the detergent by pressing the tube 232 and generates an output signal corresponding to the position of the roller 233. It can be.
  • the roller sensor 2391 is electrically connected to the control unit 100, which will be described later, and the output signal of the roller sensor 2391 can be transmitted to the control unit 100.
  • the control unit 100 can calculate the number of revolutions of the roller 233 through the output signal of the received roller sensor 2391, and can easily determine the amount of detergent supplied through this.
  • the detergent pump 230 includes a pump case 231 that accommodates a roller 233 and a tube 232, a tube 232 in which a detergent passage is formed, and a tube.
  • a roller 233 that moves the detergent by pressing (232), a carrier 234 that supports the roller 233 so that it can rotate and rotate, and a cover plate 235 coupled to the pump case 231. It may be configured to include a base plate 236 to which the cover plate 235 is coupled to one side, and a pump motor 238 that provides driving force to rotate and rotate the roller 233.
  • the pump case 231 serves to accommodate and protect the roller 233 and the tube 232, which will be described later, therein.
  • the first end surface 2311 of the pump case 231 in the direction of the rotation axis (Xc) of the roller 233 is entirely open, and the second end surface 2312 in the direction of the rotation axis (Xc) is entirely open. It can be formed to become blocked.
  • a peripheral surface 2313 may be formed between the first end surface 2311 and the second end surface 2312, and a pair of slots 2313a are formed through the peripheral surface 2313 to allow the tube to pass through. It can be.
  • the tube 232 is maintained in a C-shaped bent state inside the pump case 231.
  • a portion of the inner surface of the peripheral surface 2313 of the pump case 231 may be configured to have a semi-cylindrical shape. That is, the inner surface of the peripheral surface 2313 may act as a support surface that maintains the tube 232 bent in a C-shape while the tube 232 is pressed by the roller 233.
  • the tube 232 functions as a detergent container through which the detergent supplied from the detergent container 280 described above flows.
  • the detergent filling the internal passage of the tube 232 may be made of a flexible material so that it can be pumped by the roller 233.
  • the tube 232 when the tube 232 is pressed in a state sandwiched between the outer peripheral surface of the roller 233 and the peripheral surface 2313 of the pump case 231, it can be easily deformed so that the internal passage is blocked by the pressing force, and the roller 233 When the pressing force is released, the tube 232 can be effectively restored to its original shape.
  • the tube 232 may be configured to be partially accommodated inside the pump case 231, and has a first end 2321 that acts as an inlet through which detergent flows in, and a second end 2322 through which detergent is pumped and discharged. ) may extend to the outside of the pump case 231 by passing through each of the pair of slots 2313a of the pump case 231.
  • the portion where the tube 232 passes through the pair of slots 2313a can be firmly fixed to each of the pair of slots 2313a by a pair of tube clips 237.
  • the first end 2321 of the tube 232 which acts as an inlet, is connected to and communicates with the detergent outlet 2814 of the detergent container 280, and the second end 2322 of the tube 232, which acts as an outlet, is connected to and communicates with the detergent outlet 2814 of the detergent container 280.
  • the discharge port 218 that finally discharges the pumped detergent toward the tub 20.
  • the discharge port 218 may be formed in the exposed portion 211 of the housing 210, and is preferably formed as close as possible to the open rear surface 210a of the housing 210. You can.
  • the discharge port 218 can be formed at a position spaced as far as possible toward the inside of the tub 20 from the reference line L, and the detergent discharged from the discharge port 218 through this is disposed at the lower surface 25 of the tub 20. ) can fall freely due to gravity.
  • discharge port 218 may be formed on a stepped surface below the open rear surface 210b of the housing and at a higher position in the vertical direction than the lower surface 210d of the housing 210.
  • the discharge port 218 is covered by the cover 220.
  • the discharge port 218 is formed at a higher position in the vertical direction than the lower surface 210d of the housing 210, and can be maintained in a hidden state by the cover 220. Through this, it is possible to effectively prevent washing water flying during the operation of the dishwasher 1 from directly reaching the discharge port 218 or from flowing in through the discharge port 218.
  • the discharge port 218 is covered by the cover 220, but as shown in FIG. 11C, the bottom ( A notch-shaped groove portion 2212 may be formed in 2211).
  • the area of the groove 2212 formed at the bottom of the cover 220 may be larger than the cross-sectional area of the discharge port 218.
  • hinge holes 2213 into which the hinge axis 219 of the housing 210 is inserted may be formed on the left and right sides of the groove portion 2212 at the bottom of the cover 220, respectively.
  • the cover 220 may be rotatably supported with respect to the housing 210 with the hinge shaft 219 inserted into the hinge hole 2213.
  • the housing 210 will be provided with a first nipple 216 as an intermediate connection medium connecting the first end 2321 of the tube 232 and the valve coupling portion 215.
  • a second nipple 217 may be provided as an intermediate connection medium connecting the second end 2322 of the tube 232 and the discharge port 218.
  • first nipple 216 and the second nipple 217 may be formed integrally with the front lower part of the housing 210 where the support rib 214 is disposed.
  • a pair of first nipples 216 and second nipples 217 are attached to the housing 210 so that the detergent supply device 200 can be commonly used for supplying a single detergent and supplying different detergents. It can be formed in a position that is approximately symmetrical to the
  • detergent can flow only to the first nipple 216 and the second nipple 217 disposed on the left side of the housing 210, as shown.
  • the description will be based on the first nipple 216 and the second nipple 217 disposed on the left side of the housing 210.
  • Passages through which detergent can flow may be formed inside the first nipple 216 and the second nipple 217, respectively.
  • the first nipple 216 may be inserted into the first end 2321 of the tube 232 and connected to the first end 2321.
  • the second nipple 217 may be inserted into the second end 2322 of the tube 232 and connected to the second end 2322.
  • a continuous detergent flow path (Fd) may be formed inside the first nipple 216, the tube 232, and the second nipple 217.
  • the first nipple 216 may have a shape that extends linearly along the horizontal direction
  • the second nipple 217 may extend the detergent flow path (Fd) in a vertical direction from the horizontal direction toward the discharge port 218. It can have an L-shape to convert.
  • the roller 233 serves to pump the detergent by pressing the tube 232 and moving the detergent along the internal passage of the tube 232 while revolving along the rotation axis (Xc), which is the revolving axis.
  • the illustrated embodiment shows a configuration in which a total of three rollers 233 are provided inside the pump case 231.
  • the present invention is not limited to this, but will be described below based on an embodiment in which three rollers 233 are provided.
  • first roller 2331 For convenience and to distinguish these three rollers 233, they will be referred to as a first roller 2331, a second roller 2332, and a third roller 2333.
  • first roller 2331, the second roller 2332, and the third roller 2333 may have the same shape and size and be interchangeable with each other.
  • first roller 2331 The detailed configuration of the first roller 2331, the second roller 2332, and the third roller 2333 will be described later with reference to FIG. 14 and below.
  • the carrier 234 serves to support the first roller 2331, the second roller 2332, and the third roller 2333 so that they can rotate and rotate, respectively.
  • the carrier 234 may include a disc-shaped plate 2341 and a plurality of roller support shafts 2342 extending from the disc-shaped plate 2341 toward the roller 233.
  • the disc-shaped plate 2341 may be supported by the cover plate 235 with one side in surface contact with the cover plate 235, which will be described later.
  • the disc-shaped plate 2341 can be supported rotatably, preferably rotatably, with respect to the cover plate 235.
  • a ring-shaped guide rib 2353 arranged to surround the disk-shaped plate 2341 may be integrally formed on one surface of the cover plate 235 with which the disk-shaped plate 2341 comes into contact. there is.
  • the disc-shaped plate 2341 can be effectively prevented from being separated outward in the radial direction by the ring-shaped guide rib 2353.
  • roller support shafts 2342 that respectively protrude toward the first roller 2331, the second roller 2332, and the third roller 2333 may be formed integrally. there is.
  • the plurality of roller support shafts 2342 include a first shaft 2342a that rotatably supports the first roller 2331, and a second shaft 2342b that rotatably supports the second roller 2332. ) and a third shaft 2342c that rotatably supports the third roller 2333.
  • first shafts 2342a act as rotation axes of the first roller 2331, the second roller 2332, and the third roller 2333, respectively.
  • the first shaft 2342a to which the first roller 2331 is coupled may have a smaller protruding length than the second shaft 2342b and the third shaft 2342c. Detailed configuration regarding this will be described later with reference to FIG. 14 and below.
  • a circular through hole 2341a may be formed in the center of the disc-shaped plate 2341, penetrating through one side and the other side.
  • the output shaft 2381 of the pump motor 238, which will be described later, may extend through the through hole 2341a.
  • the output shaft 2381 simultaneously contacts the outer peripheral surfaces 2331a, 2332a, and 2333a of the first roller 2331, the second roller 2332, and the third roller 2333 to form the first roller 2331, A driving force that rotates the second roller 2332 and the third roller 2333 is transmitted, respectively.
  • the output shaft 2381 may be configured to pass through the through hole 2341a of the disc-shaped plate 2341 but not contact the disc-shaped plate 2341.
  • the carrier 234 can be supported and accommodated in an idle state by the pump case 231 and the cover plate 235 in a state in which the rotational driving force is not transmitted by the output shaft 2381.
  • the cover plate 235 is coupled to the open first end surface 2311 of the pump case 231 and serves to close the internal space of the pump case 231.
  • the roller 233, tube 232, and carrier 234 are attached to the pump case 231 by the pump case 231 and the cover plate 235. While accommodated inside, their movement in the direction of the rotation axis (Xc) may be restricted.
  • a through hole 2351 through which the output shaft 2381 of the pump motor 238 extends may be formed in the center of the cover plate 235.
  • a ring-shaped guide rib 2353 may be formed integrally with one surface of the cover plate 235 where the disc-shaped plate 2341 comes into contact.
  • the ring-shaped guide rib 2353 is formed to be concentric with the through hole 2351, and the protrusion height can be maintained approximately constant while advancing along the circumferential direction.
  • the ring-shaped guide rib 2353 has the purpose of preventing the disc-shaped plate 2341 from being deviated outward in the radial direction.
  • the inner diameter of the ring-shaped guide rib 2353 may be formed to be larger than the outer diameter of the disk-shaped plate 2341 so as not to interfere with the rotational movement of the disk-shaped plate 2341 due to contact.
  • Means for fastening to the pump case 231 may be provided at each edge portion of the cover plate 235.
  • the fastening means may be arranged at positions spaced apart from each other and may be formed at four locations.
  • each of these fastening means may be configured to act as a fastening means for the pump case 231 and at the same time act as a fastening means for the base plate 236, which will be described later.
  • each fastening means may form a common fastening part 2352 where one side can be fastened to the pump case 231 and the other side can be fastened to the base plate 236.
  • the base plate 236 is configured to have the pump motor 238 coupled to one side and the cover plate 235 described above to be coupled to the other side, and serves to connect them so that they are fixed to the housing 210.
  • a through hole 2361 extending through the output shaft 2381 of the pump motor 238 may be formed in the center of the base plate 236. there is.
  • the pump motor 238 serves to generate a rotational driving force that rotates and rotates the first roller 2331 to the third roller 2333.
  • the detergent pump 230 provided in the detergent supply device 200 of the dishwasher 1 includes a roller position detection unit 239 for detecting a change in the position of the roller 233. may further include.
  • the detergent pump 230 may further include a roller position detection unit 239 as a means for detecting the position of the roller 233.
  • the roller position detection unit 239 may be configured to include a roller sensor 2391.
  • the sensing surface 2391a of the roller sensor 2391 may be placed as close as possible along the direction of the rotation axis Xc toward the magnetic material.
  • roller sensor 2391 The correlation between the roller sensor 2391 and the roller 233 provided with a magnetic material will be described later with reference to FIGS. 19 and 20.
  • This location may be the second end surface 2312 of the pump case 231.
  • the pump motor 238 and the roller sensor 2391 may be arranged at positions spaced apart from each other along the direction of the rotation axis (Xc) with the roller 233 interposed therebetween.
  • a sensor holder 2392 capable of detachably supporting the roller sensor 2391 may be integrally provided on the second end surface 2312 of the pump case 231.
  • the sensor holder 2392 is preferably placed in a position where interference with the roller 233 rotating and revolving inside the pump case 231 does not occur.
  • a pump is formed to protrude from the second end surface 2312 in a direction parallel to the rotation axis (Xc) and away from the roller 233.
  • the configuration of the detergent pump 230 applied for supplying a single detergent has been described.
  • a detergent pump ( 230) may be additionally provided.
  • the added detergent pump 230 may be installed in a position symmetrical to the existing detergent pump 230 with respect to the housing 210.
  • roller 233 provided in the detergent pump 230 and the arrangement structure of the magnetic material will be described with reference to FIGS. 14 to 18.
  • the roller 233 includes a first roller 2331, a second roller 2332, and a third roller 2333 that have the same outer shape and size and can be arranged interchangeably with each other. It can be configured as follows.
  • the first roller 2331, the second roller 2332, and the third roller 2333 are separated from each other and can rotate and rotate on the carrier 234. ) can be supported by.
  • the carrier 234 includes a first shaft 2342a, a second shaft 2342b, and a second shaft 2342a as means for rotatably supporting the first roller 2331, the second roller 2332, and the third roller 2333, respectively.
  • the shaft 2342c may be provided in a cylindrical shape.
  • the first shaft 2342a, the second shaft 2342b, and the third shaft 2342c can support the first roller 2331, the second roller 2332, and the third roller 2333 in a separated state. They may be arranged at equal intervals around the through hole 2341a.
  • the first roller 2331, the second roller 2332, and the third roller 2333 each have a circular cross-section into which the first shaft 2342a, the second shaft 2342b, and the third shaft 2342c can be inserted.
  • First hollow parts 2331b, 2332b, and 2333b may be formed.
  • the first hollow portions (2331b, 2332b, 2333b) pass through the first end surfaces (2331d, 2332d, 2333d) of the first roller (2331), the second roller (2332), and the third roller (2333) along the rotation axis ( It may extend toward the second end surfaces 2331e, 2332e, and 2333e along the direction Xc).
  • the driving force that rotates and rotates the first roller 2331, the second roller 2332, and the third roller 2333 does not pass through the carrier 234, but is transmitted through the output shaft of the pump motor 238 ( 2381) and is directly transmitted to the first roller 2331, the second roller 2332, and the third roller 2333.
  • the rotational driving force can be transmitted from the output shaft 2381 of the pump motor 238 while simultaneously being in contact with the output shaft 2381.
  • the first roller 2331, the second roller 2332, and the third roller 2333 may be driven by friction force.
  • Means for increasing the coefficient of friction may be provided on the output shaft 2381.
  • means for increasing the friction coefficient include a method of roughening the surface of the output shaft 2381 of the pump motor 238, a method of coating the surface of the output shaft 2381 with a coating agent having a predetermined material, or This may be a method of covering the surface of the output shaft 2381 using a tube.
  • the present invention is configured to supply detergent with minimal deviation from the target detergent supply amount by determining the number of revolutions of the roller 233, which determines the actual detergent supply amount, through the number of position changes of the roller 233. You can.
  • roller sensor 2391 and a magnetic body 2393 disposed on the roller 233 may be provided as a means for detecting a change in the position of the roller 233.
  • the magnetic material 2393 may exemplarily have an external shape having a square pillar shape.
  • a second hollow portion 2331c into which a magnetic material can be inserted may be formed inside the first roller 2331.
  • the second hollow portion 2331c may be formed to have a square cross-sectional shape corresponding to the outer shape of the magnetic material 2393.
  • the second hollow portion 2331c may extend along the direction of the rotation axis Xc through the second end surface 2331e to the first hollow portion 2331b.
  • Second hollow parts 2332c and 2333c having the same shape as the first roller 2331 may be equally provided on the second roller 2332 and the third roller 2333.
  • the magnetic material 2393 may be disposed in the second hollow portion 2331c so that it is entirely buried.
  • the length of the second hollow portion 2331c in the direction of the rotation axis (Xc) may be greater than or equal to the length of the magnetic material 2393 in the direction of the rotation axis (Xc).
  • the magnetic material 2393 can be configured not to protrude from the second end surface 2331e of the first roller 2331, and an increase in the size of the detergent pump 230 due to the addition of the magnetic material 2393 can be prevented. You can.
  • the magnetic material 2393 may be disposed closer to the second end surface 2331e among the first end surface 2331d and the second end surface 2331e of the first roller 2331. .
  • the roller sensor 2391 is disposed on the second end surface 2312 of the pump case 231 at a position spaced apart from the second end surface 2331e along the direction of the rotation axis (Xc).
  • This location is selected as a location that can minimize the influence of the magnetic force emitted from the pump motor 238.
  • the magnetic material 2393 is placed on the first roller 2331 as close to the roller sensor 2391 as possible. needs to be
  • the magnetic material 2393 is provided with a bias toward the first end surface 2331d of the first roller 2331 disposed closest to the roller sensor 2391 in the direction of the rotation axis Xc.
  • the roller sensor 2391 may be disposed as close as possible to the magnetic body 2393 of the first roller 2331 based on the direction of the rotation axis (Xc).
  • roller sensor 2391 may have a sensing surface 2391a, and the sensing surface 2391a of the roller sensor 2391 may be arranged to overlap the orbital area of the magnetic material 2393 in the direction of the rotation axis Xc.
  • the straight-line distance between the sensing surface (2391a) of the roller sensor 2391 and the magnetic material 2393 can be minimized, making it possible to apply a small magnetic material and a small roller sensor 2391, so that the detergent pump 230 ) can be miniaturized and the manufacturing cost of the detergent pump 230 can be reduced.
  • the roller sensor 2391 may be configured to have a predetermined sensing area.
  • the distance (D) from the sensing surface (2391a) to the magnetic material 2393 of the first roller 2331 based on the rotation axis (Xc) is the reference distance range (Dth).
  • the area closer than the distance from the rotation axis ( The area where D) is farther than the reference distance range may be an undetected area.
  • the roller sensor 2391 detects this and includes information that the first roller 2331 is within the detection area.
  • a first output signal can be generated.
  • the roller sensor 2391 detects this and detects the first roller ( 2331) may generate a second output signal containing information that it is outside the detection range of the roller sensor 2391 and is within a non-detection area.
  • Such a first output signal and a second output signal can be transmitted as electrical signals to the control unit 100, which will be described later, and the control unit 100 converts the signal received from the roller sensor 2391 into a second output signal from the first output signal.
  • the control unit 100 converts the signal received from the roller sensor 2391 into a second output signal from the first output signal.
  • a predetermined detergent storage space may be formed inside the container body 281 of the detergent container 280.
  • Liquid detergent to be supplied to the tub 20 through the detergent pump 230 may be stored in the detergent storage space.
  • the sealing cap 283 is coupled to the inlet 2811 of the container body 281 and the container body 281 is mounted on the housing 210, the detergent storage space of the container body 281 is sealed. do.
  • the internal pressure Pi of the detergent storage space may gradually decrease in response to the remaining amount of detergent that decreases as the supply progresses.
  • the operating load of the detergent pump 230 may increase in response to the decrease in internal pressure (Pi).
  • a vent 2812 may be provided at the rear 281a of the container body 281, as shown in FIG. 21.
  • the vent 2812 may be formed through the rear side 281a of the container body 281 to communicate with the internal detergent storage space of the container body 281 and the external space.
  • the ventilation hole 2812 may be provided as a circular hole.
  • the vent hole 2812 has the maximum storage level (max) and minimum storage level (min) of the detergent based on the vertically arranged state of the detergent supply device 200. ) can be formed at a higher position.
  • a membrane 2812a is used to block the vent 2812 and vary in response to the internal pressure of the detergent storage space. can be provided.
  • the membrane 2812a is attached to the inner surface of the container body 281 and may be arranged to entirely cover the ventilation hole 2812.
  • the membrane 2812a can be easily processed into a thin film form, such as natural rubber or synthetic rubber, and can be made of a material whose shape can be easily changed in response to the difference between internal pressure (Pi) and external pressure (Po). You can.
  • the pump motor 238 may begin to drive in the reverse direction and the roller 233 may begin to rotate in the reverse direction.
  • control unit 100 of the dishwasher 1 According to an embodiment of the present invention will be described with reference to FIG. 25.
  • the dishwasher 1 may include a control unit 100 for controlling each functional configuration.
  • the control unit 100 may be provided in various forms, such as a microcontroller, microcomputer, or microprocessor, as is known in the art.
  • control unit 100 may be electrically connected to the pump motor 238 of the detergent pump 230. After the washing cycle is initiated, the control unit 100 supplies power to the pump motor 238 to drive the detergent pump 230 in the forward direction to supply detergent to the tub 20, or drives the detergent pump 230 in the reverse direction to pump air into the detergent. It is controlled so that it can be supplied to the detergent storage space of the container 280.
  • control unit 100 may be electrically connected to a roller sensor 2391 to detect a change in the position of the first roller 2331 in real time during the cleaning process.
  • the roller sensor 2391 generates a first output signal and transmits it to the control unit 100 when the magnetic material 2393 of the first roller 2331 is present in the detection area, and the first roller 2331 ) If the magnetic material 2393 leaves the detection area and exists in the non-detection area, a second output signal can be generated and transmitted to the control unit 100.
  • the first output signal may include information that the first roller 2331 is within the detection area of the roller sensor 2391, and the second output signal may include information that the first roller 2331 is outside the detection range of the roller sensor 2391. Information that it is within an undetected area may be included.
  • the control unit 100 operates the first roller 2331 when the signal received from the roller sensor 2391 changes from the first output signal to the second output signal or changes from the second output signal to the first output signal. It can be confirmed that the position of the first roller 2331 has changed as it rotates.
  • control unit 100 may be electrically connected to the water level sensor 240 for detecting the remaining amount of detergent stored in the detergent container 280.
  • the output signal of the water level sensor 240 can be transmitted to the control unit 100, and the control unit 100 easily checks the remaining amount of detergent stored inside the container body 281 through the received output signal of the water level sensor 240. It can be clearly understood. At this time, when the remaining amount of detergent detected through the water level sensor 240 is less than a predetermined amount, the control unit 100 displays a visual message containing information that the remaining amount of detergent is insufficient through the display 33 or the sound output unit 38. It can be controlled to generate an alarm or acoustic alarm.
  • control unit 100 may be electrically connected to the detachment detection sensor 260 for detecting detachment of the detergent container 280.
  • the output signal of the detachment detection sensor 260 can be transmitted to the control unit 100, and the control unit 100 can determine whether the detergent container 280 is mounted on the housing 210 through the received output signal of the detachment detection sensor 260. It is possible to easily determine whether the device is in a state of being used or has been removed from the housing 210.
  • control unit 100 sends a visual alarm or sound through the display 33 or the sound output unit 38 that includes information that the detergent container 280 is not installed. You can control it to generate an alarm.
  • control unit 100 is electrically connected to the memory and timer.
  • the control unit 100 calls operation conditions and time conditions for each stroke pre-stored in memory and uses them to generate a control signal to control the progress and end of the stroke. Furthermore, information regarding the amount of detergent supplied (preset amount) to be supplied during the washing process may be further stored in the memory.
  • control unit 100 can use a timer to calculate the elapsed time for each stroke and determine whether each stroke is complete by comparing it with pre-stored time conditions for each stroke.
  • control unit 100 is electrically connected to the display 33 and the audio output unit 38.
  • the control unit 100 can visually display information about the operating status, operating time, and whether the washing machine is complete, etc. of the dishwasher 1 through the display 33, and an audio output unit 38 such as the above-described buzzer or speaker. It is possible to control an alarm regarding the operation status or completion of an operation of the dishwasher (1) to be output by voice or sound.
  • control method (S1) of the dishwasher 1 according to the present invention will be described with reference to FIGS. 26 to 28.
  • the dishwasher 1 according to the present invention supplies detergent to the tub 20 through the single tube 232 when the pump motor 238 is driven in forward rotation, and the pump motor 238 is driven in reverse rotation. It may be configured to supply air to the detergent storage space of the detergent container 280.
  • the control method (S1) of the dishwasher 1 according to the present invention uses the roller 233. ) is driven in the forward direction so that the pump motor 238 rotates in the forward direction, and the roller 233 is rotated in the forward direction a set number of revolutions to supply a preset amount of detergent (S10), and the supply of the preset amount of detergent is completed.
  • the pump motor 238 When it is determined that the operation of the pump motor 238 is stopped (S20), the pump motor 238 is driven in the reverse direction and the roller 233 is rotated in the reverse direction by the set number of revolutions to increase the internal pressure (Pi) of the detergent storage space.
  • ) may be configured to include a step (S30) of recovering the detergent storage space, and a step (S40) of stopping the operation of the pump motor 238 when it is determined that the internal pressure (Pi) of the detergent storage space has been recovered.
  • Figure 27 shows the detailed steps of supplying a preset amount of detergent (S10).
  • control unit 100 may drive the pump motor 238 in the forward direction by supplying power to the pump motor 238 to start supplying detergent.
  • control unit 100 receives an output signal including either a first output signal or a second output signal from the roller sensor 2391. (S12)
  • the first output signal is a signal containing information that the first roller 2331 is within the detection range of the roller sensor 2391
  • the second output signal is a signal containing information that the first roller 2331 is within the detection range of the roller sensor 2391. 2391) may be information that the location is outside the detection range.
  • control unit 100 changes the received output signal from the first output signal to the second output signal, or changes the received output signal from the second output signal to the first output signal. Determine whether change occurs for the first time. (S13)
  • step S13 if it is determined that a change in the output signal has occurred for the first time in step S13, the control unit 100 determines the initial change state of the output signal. (S14)
  • the first change state is a first change state in which the output signal of the roller sensor 2391 changes from the first output signal to the second output signal, or the output signal of the roller sensor 2391 changes from the second output signal to the first change state. It can be any one of the second change states that change into the output signal.
  • step S15 when the initial change state of the output signal is determined in step S14, the control unit 100 re-receives the output signal from the roller sensor 2391. (S15)
  • control unit 100 determines whether a change in the output signal identical to the initial change state occurs from the output signal re-received in step S15. (S16)
  • step S14 determines whether the same first change state occurs, and in step S14, if the first change state is the second change state, the control unit 100 determines whether the first change state occurs. If it is determined that this is the case, it is determined whether the same second change state occurs.
  • control unit 100 increases the number of forward signal changes (N) by one and updates the updated forward signal. Store the number of signal changes (N1) in memory. (S17)
  • the updated and stored number of forward signal changes (N1) may be the number of forward revolutions of the first roller 2331 calculated from the start of operation of the pump motor 238.
  • control unit 100 compares the updated forward signal change count (N1) and the preset count (N_th) in step S17. (S18)
  • the preset number of times (N_th) may be exemplarily 100 times.
  • the preset number of times (N_th) may be set differently depending on the volume of washing water, the volume of detergent required, the inner diameter of the applied tube 232, and the spacing and number of rollers 233 applied.
  • step S18 if it is determined that the updated number of forward signal changes (N1) has reached the preset number (N_th), the control unit 100 determines the amount of detergent supplied after the pump motor 238 starts operating. It may be determined that the preset detergent supply amount has been reached, and it may be determined that the supply of detergent has been completed. (S19)
  • control unit 100 calculates the number of forward revolutions of the first roller 2331 based on the number of position changes of the first roller 2331, and the calculated number of forward revolutions of the first roller 2331 is a preset number of times.
  • N_th it is determined that the preset detergent supply amount has been reached.
  • control unit 100 may return to step S15 and repeat the subsequent steps.
  • FIG 28 shows the detailed steps of the step (S30) of recovering the internal pressure (Pi) of the detergent storage space described above.
  • control unit 100 may drive the pump motor 238 in the reverse direction by supplying power to the pump motor 238 to start supplying air to the detergent storage space of the detergent container 280.
  • step S31 reverse driving of the pump motor 238 may begin and reverse rotation of the first roller 2331 may begin.
  • control unit 100 receives an output signal including either a first output signal or a second output signal from the roller sensor 2391.
  • control unit 100 determines whether a change in the output signal opposite to the initial change state occurs from the output signal received in step S32. (S33)
  • step S14 determines whether the first change state in the above-described step S14 is the first change state. That is, if it is determined that the first change state in the above-described step S14 is the first change state, the control unit 100 determines whether the opposite second change state occurs, and in step S14, the control unit 100 determines whether the first change state is the first change state. 2 If it is determined that it is in a change state, it is determined whether the opposite first change state occurs.
  • control unit 100 may be configured to detect a change state that is opposite to the initial change state.
  • control unit 100 increases the number of reverse signal changes (N2) by one and updates it.
  • the number of reverse signal changes (N2) is stored in memory.
  • the updated and stored reverse signal change number N2 may be the reverse rotation number of the first roller 2331 calculated from the start of operation of the pump motor 238.
  • control unit 100 compares the updated reverse signal change count (N2) with the preset count (N_th) in step S34. (S35)
  • the preset number of times (N_th) may be 100, the same as the preset number of times (N_th) in step S18 described above.
  • step S35 if it is determined that the updated reverse signal change count (N2) has reached the preset count (N_th) as a result of comparison in step S35, the control unit 100 stores the detergent storage space after the reverse drive of the pump motor 238 is started. It can be determined that the internal pressure of has been recovered. (S36)
  • control unit 100 calculates the number of reverse revolutions of the first roller 2331 based on the number of reverse position changes of the first roller 2331, and the calculated number of reverse revolutions of the first roller 2331 is preset.
  • the number (N_th) is reached, the amount of air corresponding to the amount of detergent supplied during step S10 is supplied to the detergent container 280, and through this, it can be determined that the internal pressure (Pi) of the detergent storage space has been recovered.
  • control unit 100 may return to step S32 and repeat the subsequent steps.
  • the detergent supply device 200 of the dishwasher 1 calculates the number of revolutions in the forward direction of the first roller 2331 and supplies a target detergent based on the calculated number of revolutions of the first roller 2331. Since the detergent storage space can be controlled so that the internal pressure (Pi) can be recovered by determining whether the supply amount has been reached and rotating the first roller 2331 in the reverse direction equal to the number of rotations in the forward direction, the tube (2331) as described above Despite the hardening or wear of 232) and the occurrence of slip due to a decrease in friction between the roller 233 and the output shaft 2381 of the pump motor 238, the internal pressure (Pi) of the detergent container 280 is increased in response to the actual detergent supply amount. ) has the effect of being effectively recovered.

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  • Washing And Drying Of Tableware (AREA)

Abstract

La présente invention concerne un lave-vaisselle et son procédé de commande, le lave-vaisselle fournissant, par l'intermédiaire d'un seul tube, un détergent à une cuve pendant l'entraînement en rotation vers l'avant d'un moteur de pompe et fournissant de l'air à un récipient de détergent pendant l'entraînement en rotation inverse du moteur de pompe, ayant ainsi une structure simplifiée, ayant une aptitude à l'assemblage améliorée, et permettant de réduire les coûts de fabrication.
PCT/KR2023/020856 2022-12-20 2023-12-18 Lave-vaisselle et son procédé de commande WO2024136363A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020220179507A KR20240097451A (ko) 2022-12-20 식기세척기
KR10-2022-0179507 2022-12-20

Publications (1)

Publication Number Publication Date
WO2024136363A1 true WO2024136363A1 (fr) 2024-06-27

Family

ID=91589315

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2023/020856 WO2024136363A1 (fr) 2022-12-20 2023-12-18 Lave-vaisselle et son procédé de commande

Country Status (1)

Country Link
WO (1) WO2024136363A1 (fr)

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