Dishwasher and method for controlling washing course of dishwasher

Abstract

The present invention relates to a dishwasher and a control method thereof, wherein, while the dishwasher is running, a washing course can be changed to a low-noise washing course or returned to the previous washing course in real time by a simple operation using a user terminal.

Description

Dishwasher and dishwasher washing course control method

[0001] The present invention relates to a dishwasher that operates by dividing it into a standard mode and a low-noise washing mode, wherein the dishwasher can automatically switch to the standard mode or the low-noise washing mode when a no-disturb time set by the user is reached or elapses during dishwashing.

[0002]

[0003] A dishwasher is a device that cleans dishes by removing food residue and grease stains left on dishes after a meal through the spraying of dishwashing water in which detergent is dissolved. Specifically, dishwashing water is sprayed at high pressure inside a tub, and the sprayed water comes into contact with the dishes, thereby cleaning away foreign substances such as food residue stuck to the surface of the dishes.

[0004] The process of a dishwasher washing dishes does not simply end with the spraying of detergent-dissolved water, but is accomplished through several stages.

[0005] The dishwasher can operate in the stages of pre-wash, main wash, rinse, heat rinse, and drying.

[0006] However, since dishwashers generate noise during the aforementioned washing cycle due to the operation of the washing motor or the water pressure sprayed from the nozzle onto the dishes, existing dishwashers are managed by separately setting a low-noise mode that allows the dishwashing cycle to proceed while reducing the noise of the dishwasher.

[0007] However, the above-mentioned low-noise mode had the disadvantage that it was executed only when the user instructed a mode change via the dishwasher or user terminal.

[0008] In addition, at this time, the user had to go through the cumbersome process of moving to the kitchen area to change the dishwasher's washing course to low noise mode, stopping the washing operation, turning the power off and on again to set it to low noise mode.

[0009]

[0010] The objective of the present specification for solving the aforementioned problems is to provide a dishwasher and a method for controlling the washing course of a dishwasher that can simply change from standard mode to low-noise mode or from low-noise mode to standard mode when a user's command or a user-preset no-disturb time is reached or elapsed during the washing operation of the dishwasher.

[0011] In addition, the objective according to the present specification is to provide a dishwasher system that, while monitoring the washing status with an internal camera during dishwashing, if a part requiring additional washing is detected, sets an additional washing cycle to perform the additional washing and then proceeds to the next washing cycle.

[0012]

[0013] The objects of the present invention are not limited to those mentioned above, and other unmentioned objects and advantages of the present invention may be understood from the following description and will be more clearly understood by the embodiments of the present invention. Furthermore, it will be readily apparent that the objects and advantages of the present invention can be realized by the means and combinations thereof set forth in the claims.

[0014]

[0015] To solve the above-mentioned problem, the present invention relates to a dishwasher comprising a standard mode consisting of washing courses including a general course, a heavy course, and a delicate course, and a low-noise mode consisting of washing courses corresponding to each washing course of the standard mode, wherein each washing course is driven by including at least one of a pre-washing course, a main washing course, a rinsing course, a heat rinsing course, and a drying course, wherein the dishwasher comprises: an input unit that receives a washing mode, a washing course selection signal, and a no-disturb time from a user terminal; and a storage unit that stores data for a washing motor speed, a heating heater temperature, and the duration of said washing motor speed and heating heater temperature according to each washing course of said standard mode, and stores data for a washing motor speed, a heating heater temperature, and the duration of said washing motor speed and heating heater temperature according to each washing course of said low-noise mode corresponding to each washing course of said standard mode. The present invention may include a control unit that controls the washing motor and heating heater after selecting and acquiring operation information for the washing motor and heating heater according to the washing mode and washing course input by the above input unit from the above storage unit; and the control unit may be characterized by controlling the washing motor and heating heater by compensating and matching to the beginning of the washing course of the low-noise mode washing course corresponding to each washing course of the currently ongoing standard mode washing course when the above prohibition time is reached during the washing course of the above standard mode washing course.

[0016] In one embodiment of the present invention, the non-disturbing time may be characterized by being divided into a start time and an end time.

[0017] In one embodiment of the present invention, the input unit may include: a voice input unit that receives a voice signal for the washing mode, washing course, and no-disturb time; a communication unit that receives the washing mode, washing course, and no-disturb time through a communication network from a user terminal or a management server; a remote receiver unit that receives the washing mode, washing course, and no-disturb time wirelessly from a remote controller; and a user interface unit that allows a user to input the washing mode, washing course, and no-disturb time to the dishwasher.

[0018] In one embodiment of the present invention, the control unit may be characterized by changing the control of the washing motor and the heating heater by compensating for and matching each washing stroke of the currently ongoing low-noise mode washing course to the starting part of the washing stroke of the standard mode washing course corresponding to each washing stroke of the low-noise mode washing course when the end time of the interruption prohibition time is reached during the operation of the low-noise mode washing course.

[0019] In one embodiment of the present invention, the control unit may be characterized by receiving a washing mode change signal from the input unit during the progress of the standard mode washing course, and then controlling the washing motor and heating heater by compensating for and matching each washing stroke of the currently progressing standard mode washing course to the start of the washing stroke of the low-noise mode washing course.

[0020] In one embodiment of the present invention, the control unit may be characterized by receiving a washing mode change signal from the input unit during the progress of the low-noise mode washing course, and then controlling the washing motor and heating heater by compensating for and matching each washing stroke of the currently progressing low-noise mode washing course to the start of the washing stroke of the standard mode washing course.

[0021] In one embodiment of the present invention, the dishwasher may be characterized by comprising: a case forming an exterior and having an open front; a door sealing the open front of the case; a tub containing washing water inside; a rack located inside the tub and containing dishes; a nozzle for spraying washing water onto dishes; and a camera installed on one side of the interior of the dishwasher, and a display and a speaker installed on one side of the case.

[0022] In one embodiment of the present invention, the camera may be characterized by transmitting video information monitoring the dishwashing status inside the dishwasher to a user terminal during the pre-wash, main wash, rinse, or heat rinse cycles of the washing course.

[0023] In one embodiment of the present invention, the user may specify a part requiring reinforcement cleaning from the image information and transmit it to the input unit.

[0024] In one embodiment of the present invention, the control unit may be characterized by additionally performing a reinforcement stroke in which, when a reinforcement cleaning portion is transmitted to the input unit, the nozzle is moved for a predetermined time after the end of the ongoing cleaning stroke so that cleaning water is concentrated and delivered to the reinforcement cleaning portion.

[0025] In one embodiment of the present invention, the storage unit may be characterized by storing the washing motor speed, the heating heater temperature, and the duration of the washing motor speed and heating heater temperature according to the reinforcement stroke of each washing course of the standard mode and low-noise mode as data.

[0026] In one embodiment of the present invention, the control unit may be characterized by turning off the display and speaker functions during the interruption prevention time.

[0027]

[0028] According to the present invention, if the operating noise of the dishwasher is bothersome while a user is taking a break, the user can control the operation through a smartphone held in their hand and switch to a low-noise mode in real time.

[0029] In addition, according to the present invention, if the operating noise of the dishwasher is bothersome while the user is sleeping, the user can control the operation by running an app (ThinQ App) via a smartphone next to or nearby and changing to a low-noise course in real time.

[0030] In addition, according to the present invention, when a customer sets a no-disturb time, the system automatically switches from a standard mode washing course to a low-noise mode washing course without any additional operation, thereby enhancing user convenience.

[0031] In addition, according to the present invention, when the no-disturb time set by the user is reached, the dishwasher automatically switches from standard mode to low-noise mode, thereby saving the user the trouble of making additional settings.

[0032] In addition, according to the present invention, when the no-disturb time set by the user has elapsed, the dishwasher automatically switches from low-noise mode to standard mode, thereby saving the user the trouble of making additional settings.

[0033] In addition, according to the present invention, when the no-disturb time set by the user is reached, both the display and the speaker of the dishwasher are turned off to ensure the user's rest, thereby increasing satisfaction.

[0034] In addition, according to the present invention, a user can monitor dishwashing using a camera installed inside the dishwasher, and if a part requiring additional washing is found, the user can perform additional washing by proceeding with the additional washing after the current washing process is completed.

[0035] In addition, according to the present invention, by changing to a low-noise mode during the operation of a washing course, the cleaning performance can be maintained at an equivalent or higher level even though the contaminant impact spraying force is reduced to reduce washing noise.

[0036] In addition, according to the present invention, when the standard washing course is changed to a low-noise course, the speed of the washing motor is reduced, while the washing time is made longer than that of the washing course and the temperature is made higher than that of the washing course.

[0037] In addition, according to the present invention, a course change is possible without interrupting the operating washing course, and when one wishes to change back to the existing course after operating in low-noise mode, it can be easily returned.

[0038] In addition, according to the present invention, the dishwasher may be characterized by having a door, a tub in which a washing space is formed inside, a nozzle for spraying washing water onto dishes, and a display and a speaker installed therein.

[0039]

[0040] In addition to the effects described above, the specific effects of the present invention are described together with the specific details for implementing the invention below.

[0041]

[0042] FIG. 1 is a schematic diagram showing the overall configuration of a home appliance control system according to an embodiment of the present invention.

[0043] FIG. 2 is a block diagram schematically illustrating the internal configuration of a dishwasher according to one embodiment of the present invention.

[0044] FIG. 3 is a block diagram schematically illustrating the internal configuration of a user terminal according to one embodiment of the present invention.

[0045] FIG. 4 is a block diagram schematically illustrating the internal configuration of a management server according to one embodiment of the present invention.

[0046] FIG. 5 is a perspective view showing the external shape of a dishwasher according to an embodiment of the present invention.

[0047] FIG. 6 is a perspective view showing the door of a dishwasher in an open state according to an embodiment of the present invention.

[0048] FIG. 7 is a flowchart showing the step-by-step operation sequence of a dishwasher according to an embodiment of the present invention.

[0049] FIG. 8 is a configuration diagram showing the control unit and function block of a dishwasher according to an embodiment of the present invention.

[0050] FIG. 9 is a diagram showing a basic conceptual diagram of a washing course change according to an embodiment of the present invention.

[0051] FIG. 10 is an operation flowchart illustrating a method for controlling a cleaning course of a management server according to an embodiment of the present invention.

[0052] FIG. 11 is a diagram showing an example of a change point for each unit stroke of a dishwasher according to an embodiment of the present invention.

[0053] FIG. 12 is a diagram showing an operation flowchart to explain a washing course control method of a dishwasher according to an embodiment of the present invention.

[0054] FIG. 13 is a diagram showing the level of noise reduction at the time of change for each stroke unit of a dishwasher according to an embodiment of the present invention.

[0055] FIG. 14 is a diagram showing the noise of the standard mode washing course by stroke unit of a dishwasher according to an embodiment of the present invention.

[0056] FIG. 15 is a diagram showing an example of noise reduction at the time of change of each stroke unit of a dishwasher according to an embodiment of the present invention.

[0057] FIG. 16 is a diagram showing the logic for changes in dishwasher operation according to the arrival and elapsed of the no-disturb time in standard mode and low-noise mode according to an embodiment of the present invention.

[0058] FIG. 17 is a diagram showing the logic for changing the washing mode according to a user's command during a unit stroke of a dishwasher in which a washing course is being performed in a standard mode or a low-noise mode according to an embodiment of the present invention.

[0059]

[0060] The aforementioned objectives, features, and advantages will be described in detail below with reference to the attached drawings, and accordingly, a person skilled in the art to which the present invention pertains will be able to easily implement the technical concept of the present invention.

[0061] In describing the present invention, detailed descriptions of known technologies related to the present invention are omitted if it is determined that such descriptions could unnecessarily obscure the essence of the invention.

[0062] Hereinafter, embodiments of the present invention will be described in detail with reference to the attached drawings so that those skilled in the art can easily implement the invention. The present invention may be embodied in various different forms and is not limited to the embodiments described herein.

[0063] To clearly explain the present invention, parts unrelated to the explanation have been omitted, and the same reference numerals are used for identical or similar components throughout the specification.

[0064] In addition, some embodiments of the present invention will be described in detail with reference to the exemplary drawings. In assigning reference numerals to the components of each drawing, the same components may have the same reference numeral as much as possible, even if they are shown in different drawings.

[0065] In addition, in describing the present invention, if it is determined that a detailed description of related known components or functions could obscure the essence of the invention, such detailed description may be omitted.

[0066] In describing the components of the present invention, terms such as first, second, A, B, (a), (b), etc., may be used. These terms are intended only to distinguish the components from other components, and the nature, order, sequence, or number of the components are not limited by these terms. Where it is stated that a component is "connected," "combined," or "connected" to another component, it should be understood that the component may be directly connected or connected to the other component, but that other components may be "interposed" between each component, or that each component may be "connected," "combined," or "connected" through other components.

[0067] In addition, for convenience of explanation in implementing the present invention, the components may be described in detail; however, these components may be implemented within a single device or module, or a single component may be divided and implemented across multiple devices or modules.

[0068] The home appliance described herein includes a dishwasher. The home appliance enables continuous functional upgrades of the home appliance. To this end, the home appliance may be connected to a management server via a communication network using a router or an Access Point (AP).

[0069] FIG. 1 is a schematic diagram showing the overall configuration of a home appliance control system according to an embodiment of the present invention.

[0070] Referring to FIG. 1, a home appliance control system (1) (hereinafter referred to as "system") according to an embodiment of the present invention may include a dishwasher (10), a user terminal (20), a management server (30), and an access point (Access Point; 40).

[0071] The dishwasher (10) may be equipped with a display module that displays information and a communication device having a communication function.

[0072] The dishwasher (10) may be equipped with a communication interface or a communication unit necessary for performing wired or wireless communication. Additionally, the dishwasher (10) may provide information related to the washing operation to the user through visual or auditory information output.

[0073] The dishwasher (10) can periodically transmit information about the software installed in the dishwasher (10) to the management server (30) through the router (40).

[0074] In addition, the dishwasher (10) can transmit software information, such as that of a separate electronic device connected via wired or wireless connection, such as a remote control, to the management server (30).

[0075] In addition, the communication method between the dishwasher (10) and the management server (30) may differ from the communication method between the dishwasher (10) and a separate electronic device.

[0076] Additionally, if the software of a separate electronic device connected via wired or wireless connection needs to be upgraded, the dishwasher (10) can transmit the software received from the management server (30) to the said electronic device or transmit it to multiple separate electronic devices using a broadcasting method.

[0077] Software information transmitted from the dishwasher (10) to the management server (30) may include a user ID, model name, serial number, software version, software content, user settings, product storage capacity information, etc.

[0078] The management server (30) can compare the software information of the dishwasher (10) with the software information registered in the management server (30) through the user ID, model name, serial number, etc. from the transmitted software information.

[0079] The management server (30) can select either a general upgrade or an automatic upgrade method for updating or upgrading the software of the dishwasher (10) based on the comparison result, or select either a general upgrade or an automatic upgrade method through the model name, serial number, etc. of the dishwasher (10).

[0080] The user terminal (20) may be a device carried or owned by the user. For example, the user terminal (20) may include a smartphone, laptop, tablet PC, smart TV, smart watch, etc., but the scope of the user terminal (20) is not limited thereto. Below, an embodiment of the present specification is described with the example that the user terminal (20) is a smartphone.

[0081] A user terminal (20) is any terminal comprising a processor for command processing or computation, a display for displaying various information, a voice input device capable of receiving a user's voice (e.g., a microphone), a voice output device capable of outputting voice (e.g., a speaker), a shooting device capable of acquiring a picture of an object located outside (e.g., a camera), and a communication module capable of performing communication functions with other devices.

[0082] The user can remotely control the dishwasher (10) installed in the home or check the operating status of the dishwasher (10) in real time using a user terminal (20) (e.g., a mobile terminal or a tablet).

[0083] The user can run an application (ThinQ App) for managing the dishwasher (10) installed on the user terminal (20), input control commands for the dishwasher (10), or request to look up information related to the operating status of the dishwasher (10). The user terminal (20) can transmit control commands to the management server (30) or request the transmission of information regarding the dishwasher (10) in accordance with the user's request.

[0084] The management server (30) may be a device for remotely managing the dishwasher (10). The management server (30) may be connected to the dishwasher (10) via an access point (40). In addition, the management server (30) may be connected to the user terminal (20) via communication and may manage the dishwasher (10) in conjunction with the user terminal (20).

[0085] The management server (30) stores information to be provided to the dishwasher (10) or user terminal (20), software required for upgrades, etc. Additionally, the management server (30) can transmit software or information required for upgrades to the dishwasher (10) or user terminal (20) in advance via a push method according to a pre-set download method or storage mechanism, etc.

[0086] In particular, the management server (30) can store information for upgrading the dishwasher (10). The information stored in the management server (30) may include software data installed in the dishwasher (10), information related to the dishwasher (10), user-related information, etc. The software data may include data regarding the firmware of the dishwasher (10) (i.e., firmware data) and data regarding a content program executed on the firmware (i.e., content program data).

[0087] The access point (40) can act as a relay between the management server (30) and the dishwasher (10). The access point (40) may be a Wi-Fi router. Therefore, the access point (40) may be referred to as a router (40).

[0088] The access point (40) is connected to a communication line installed in a place such as a home or office and transmits a wireless signal. The dishwasher (10) and the user terminal (20) are located within a range where they can receive the wireless signal from the access point (40). The access point (40) receives wireless signals transmitted from devices connected to the router (40), such as the dishwasher (10) and the user terminal (20), and transmits them to the outside through the communication line, or converts signals input from the outside through the communication line into wireless signals and transmits them. Accordingly, the dishwasher (10) connected to the access point (40) can communicate with the management server (30). Here, the access point (40) can be, for example, a router (40).

[0089] The management server (30) communicates with the dishwasher (10) through, for example, a router (40) installed in the home. The management server (30) transmits a control command entered by a user to the dishwasher (10) through the router (40), or requests the dishwasher (10) to transmit information related to the operating status of the dishwasher (10). The dishwasher (10) is controlled according to the control command entered by the user, or transmits information related to the operating status of the dishwasher (10) to the management server (30) through the router (40).

[0090] The management server (30) transmits information related to the operating status of the received dishwasher (10) to the user terminal (20). Through this process, the user can remotely control the dishwasher (10) using the user terminal (20) or view information related to the operating status of the dishwasher (10) in real time.

[0091] When a user requests an upgrade of the software or firmware installed on the dishwasher (10) through an application installed on the user terminal (20), the management server (30) transmits the new software or firmware to the dishwasher (10).

[0092] The user can set elements and functions for upgrading the software or firmware of the dishwasher (10) or check the upgrade status of the software or firmware of the dishwasher (10) through an application installed on the user terminal (20).

[0093] Users can communicate with the management server (30) or with the dishwashers (10) using the user terminal (20). Users can control the functions of multiple dishwashers (10) or control the upgrade method through the user terminal (20).

[0094] The user terminal (20) and the dishwasher (10) can communicate via the management server (30). Alternatively, the user terminal (20) and the dishwasher (10) can communicate directly using short-range communication.

[0095] We will look at the visual and auditory interfaces that inform the user that new features of the product have been added while the dishwasher (10) is connected to the network.

[0096] After the new upgrade function is registered in the management server (30), the dishwasher (10) can provide a visual and auditory interface to notify users that a new function has been added and to allow users to recognize it. Here, the new function is a function in which the dishwasher (10) changes to a low-noise course of a certain decibel (dB) or less according to user input while running the standard course of the washing function.

[0097] The display (LCD, LED, etc.) of the dishwasher (10) can output visual information. The speaker, vibration element, buzzer, etc. of the dishwasher (10) can output auditory information (sound effects).

[0098] Users can check visual and auditory information and recognize that new features have been added.

[0099] Hereinafter, with reference to FIGS. 2 to 4, the configuration of the dishwasher (10), user terminal (20), and management server (30) will be described in more detail.

[0100] FIG. 2 is a block diagram schematically illustrating the internal configuration of a dishwasher according to one embodiment of the present invention.

[0101] Referring to FIG. 2, a dishwasher (10) according to an embodiment of the present invention may include a home appliance control unit (110), a communication unit (120), a function execution unit (130), a user interface unit (140), and a storage unit (150).

[0102] Here, the communication unit (120) and the user interface unit (140) correspond to an example of an input unit. The input unit can receive a course change signal that commands the washing course to be changed to a low-noise course with a lower noise level than the washing course.

[0103] As shown in FIG. 7, the washing course may include a standard course and a powerful course. The standard course may include a pre-washing course, a main wash course, a rinsing course, a heat rinsing course, a drying course, etc.

[0104] For example, as an input unit, the communication unit (120) receives a course change signal from the user terminal (20), and the user interface unit (140) receives the course change signal according to the user's touch operation.

[0105] The configuration of the dishwasher (10) is not limited to FIG. 2, and various additional components may be included in the dishwasher (10).

[0106] For example, the input unit may further include a voice input unit that receives a voice signal as a course change signal; a communication unit that receives a course change signal from a user terminal or a management server via a communication network; and a remote receiver for receiving a course change signal wirelessly from a remote controller.

[0107] The input unit (120) can receive an input signal to operate the dishwasher in a standard mode and a low-noise mode that minimizes noise generated during dishwashing.

[0108] The function execution unit (130) can execute a washing course by distinguishing between a standard mode and a low-noise mode according to the input command signal.

[0109] Here, the standard mode can be operated as a washing course that includes a general course, a powerful course, and a delicate course.

[0110] The Standard Course is a standard washing cycle, the Intensive Course is for washing heavily soiled dishes, and the Delicate Course is for washing delicate tableware such as wine glasses.

[0111] The low-noise mode can be composed of the same washing course corresponding to each washing course of the standard mode above.

[0112] The washing course of each of the above modes executes a washing process including a pre-washing process, a main washing process, a rinsing process, a heat rinsing process, and a drying process.

[0113] In addition, as will be described later, a reinforcement process may be included after each washing process in progress by the dishwasher to perform additional washing requested by the user.

[0114] The communication unit (120), the function execution unit (130), and the user interface unit (140) can transmit and receive data to and from each other via a local bus.

[0115] The function execution unit (130) executes a washing process including a pre-washing process, a main washing process, a rinsing process, a heating rinsing process, and a drying process included in each washing course.

[0116] Additionally, the function execution unit (130) may include a temperature detection unit for detecting the temperature for performing the cleaning function.

[0117] The home appliance control unit (110) is connected to the communication unit (120) via a local bus and can control the overall operation for performing the functions of the dishwasher (10). The home appliance control unit (110) can simply be referred to as the 'control unit (110)'.

[0118] The home appliance control unit (110) may include a storage unit (150) in which operation control software for controlling at least one washing operation is stored.

[0119] The storage unit (150) can store information required for each stroke of a washing course, including a washing mode which is a general washing mode and a low-noise mode which can minimize noise generation during washing.

[0120] The above information may include the speed and duration of the washing motor and the temperature and duration of the heating heater.

[0121] When the control unit receives a signal to change the washing mode, i.e., the standard mode or the low-noise mode, from the input unit, it switches to a washing stroke of another washing mode corresponding to the washing stroke of the washing mode currently in progress, and can continue to perform the washing stroke by adjusting the washing motor speed, washing motor duration, or the temperature and heating heater duration of the corresponding heater.

[0122] The communication unit (120) can communicate with the user terminal (20) and the management server (30). That is, the communication unit (120) can communicate with the user terminal (20) and the management server (30) to change the standard mode or the washing mode, or to change the washing course included in the mode.

[0123] The function performing unit (130) performs the washing function unique to the dishwasher (10). That is, the function performing unit (130) may be a component that performs the unique function provided by the dishwasher (10). For example, the unique function may include the function of washing and drying dishes.

[0124] Accordingly, the communication unit (120) can communicate with the management server (30) to upgrade the cleaning function in part or in whole. Additionally, the communication unit (120) may include a storage unit that stores firmware-related information and software-related information necessary to perform the unique function.

[0125] The function execution unit (130) may include a function execution module and a function control unit, although not illustrated.

[0126] The function execution module is a module that performs a cleaning function and may include, for example, a drive unit including a motor, a heating unit, a temperature detection unit, etc.

[0127] The user interface unit (140) can provide the user with information regarding the operation of the dishwasher (10), information regarding the upgrade of the dishwasher (10), etc. As an example, the user interface unit (140) may include a display module and a speaker module. Meanwhile, the user interface unit (140) may receive input from the user to control the operation of the dishwasher (10).

[0128] The user interface unit (140) can output cleaning operation information and input data.

[0129] The user interface section (140) may include an input / output module and an interface control section, although not shown.

[0130] The input / output module can visually and / or audibly output information regarding the operation and upgrade of the dishwasher (10) to the user, and can receive input information. If the input / output module is a display module, the user interface section (140) may be a display panel. In addition, the user interface section (140) may include a speaker, a buzzer, an LED segment, etc.

[0131] When the washing process of the washing course is carried out in low-noise mode, means that may disturb the user's rest, such as the display and speaker mentioned above, may be turned off.

[0132] Additionally, the dishwasher (10) may receive a message from the user terminal (20) instructing it to change the standard mode to a low-noise mode or vice versa.

[0133] This can be done via a management server (30) or through direct communication with a user terminal (20), and the dishwasher (10) that receives the instruction message changes the washing mode and performs the operation of changing to a washing course of the changed mode corresponding to the washing course of the mode that was being performed immediately before.

[0134] Additionally, the user interface unit (140) can output operation information regarding the unique functions of the dishwasher (10). For example, the user interface unit (140) can display and output operation information regarding the pre-washing cycle, main wash cycle, rinsing cycle, heat rinsing cycle, drying cycle, etc. of the dishwasher (10) on the screen.

[0135] For example, when a washing mode change signal is input, the home appliance control unit (110) can adjust the speed and duration of the washing motor and the temperature and duration of the heating heater to secure a washing environment suitable for the progress of the changed washing mode.

[0136] For example, the home appliance control unit (110) can control the washing time of the low-noise mode to be longer than the washing time of the standard mode washing course.

[0137] FIG. 3 is a block diagram schematically illustrating the internal configuration of a user terminal according to one embodiment of the present invention.

[0138] In FIG. 3, the user terminal (20) may be referred to as a client device, etc.

[0139] Referring to FIG. 3, a user terminal (20) according to an embodiment of the present invention may include a terminal communication unit (210), a terminal control unit (220), and a terminal interface unit (230).

[0140] It may include additional terminal storage units, although not shown in the city.

[0141] The terminal communication unit (210) can communicate with the management server (30). The terminal communication unit (210) can communicate using a wired method and / or a wireless method. The wireless method may include a short-range wireless communication method and a long-range wireless communication method.

[0142] The terminal control unit (220) can control the terminal communication unit (210) and the terminal interface unit (230).

[0143] The terminal communication unit (210) can select a washing mode or washing course according to the input of the terminal interface (230) and transmit the result to the dishwasher (10) or management server (30).

[0144] Here, in the case of low noise mode, the washing stroke of each washing course may be a value that is 4 decibels (dB) or lower than the decibel (dB) according to the noise level compared to the standard mode.

[0145] FIG. 4 is a block diagram schematically illustrating the internal configuration of a management server according to one embodiment of the present invention.

[0146] In FIG. 4, the management server (30) may be referred to simply as 'server'.

[0147] Referring to FIG. 4, a management server (30) according to an embodiment of the present invention may include a server communication unit (310), a server control unit (320), and a server storage unit (333).

[0148] The server communication unit (310) can communicate with the dishwasher (10) and the user terminal (20).

[0149] The server communication unit (310) can receive a washing course control command from the server control unit (320) and transmit it to the dishwasher (10).

[0150] The server communication unit (310) can perform communication using a wired method and / or a wireless method. The wireless method may include a short-range wireless communication method and a long-range wireless communication method.

[0151] The server control unit (320) can control the generation of a washing course control command corresponding to a washing mode or washing course change signal and transmit it to the dishwasher (10).

[0152] That is, the server control unit (320) can check the washing process being executed by the dishwasher (10), identify the washing course corresponding to the changed mode and the washing motor speed, washing time, and temperature according to the washing process, and transmit them to the dishwasher (10) for control.

[0153] FIG. 5 is a perspective view showing the external shape of a dishwasher according to an embodiment of the present invention, FIG. 6 is a perspective view showing the door of a dishwasher in an open state according to an embodiment of the present invention, FIG. 7 is a flowchart showing the step-by-step operation sequence of a dishwasher according to an embodiment of the present invention, and FIG. 8 is a configuration diagram showing the control unit and function block of a dishwasher according to an embodiment of the present invention.

[0154] Referring to FIG. 5, a dishwasher (10) according to an embodiment of the present invention comprises a case (11) with an open front exterior and a door (12) that seals the open front of the case. The case (11) and the door (12) at the front of the dishwasher (10) seal the internal space so that washing water or detergent does not leak out while washing dishes.

[0155] Referring to FIG. 6, when the door (2) of the dishwasher (10) is opened, the door (12) can be opened at a right angle of 90 degrees with respect to the case (11). The interior of the dishwasher (10) may include a tub (108) for receiving washing water, a sump (106) at the bottom of the tub for collecting washing water and filtering out foreign matter and spraying it, a nozzle (104) connected to the sump and rotating to spray washing water into the tub, and a rack (101, 102) formed inside the tub and divided into upper and lower sections for storing a plurality of dishes.

[0156] That is, the tub (108) forming the washing space inside the dishwasher (10) is opened and closed by the door (12), and a nozzle (104) for spraying washing water onto dishes may be installed in the tub (108).

[0157] As described above, a display that visually outputs operation information of the dishwasher (10) and a speaker that outputs auditory information may be installed on one side of the dishwasher (10).

[0158] For example, the display and speaker may be installed on one side of the door (12).

[0159] For example, a tub (108) for receiving washing water is placed inside the dishwasher (10), and a sump (106) is placed below the tub to collect washing water, filter out foreign matter, and spray it again. The interior of the dishwasher (10) configured in this way can be called a "washing chamber." The washing chamber collects washing water and sprays it onto dishes to filter out foreign matter according to the washing process of a washing course or a low-noise course. The interior of the aforementioned dishwasher (10) can be called a "function performing unit (130)."

[0160] Inside the tub (108), a plurality of racks (101, 102) that are separated vertically and a nozzle (104) that sprays cleaning water toward each rack (101, 102) are formed.

[0161] The above nozzle can adjust its position or the amount of washing water sprayed by the home appliance control unit.

[0162] Additionally, a washing water channel (109) is provided on one side inside the tub (108) to supply washing water to the upper nozzle (104a) and the top nozzle (104c).

[0163] Additionally, in one embodiment of the present specification, an optical sensor may be provided inside the tub (108). The optical sensor may be a camera, a thermal imaging camera, or a temperature measuring device, but is not limited thereto, and includes any device capable of detecting infrared radiation emitted from an object and measuring the temperature of the object without contact with the object.

[0164] The above camera can transmit the status of tableware during an ongoing washing process, particularly pre-wash, main wash, rinse, and heat rinse, as image information to the above user terminal.

[0165] Based on the above video information, the user can specify areas requiring reinforcement cleaning and transmit the information back to the user terminal to the dishwasher.

[0166] Based on the information above, the control unit (110) may additionally perform a reinforcement process by moving the nozzle for a predetermined time after the end of the cleaning process of the ongoing cleaning course so that the cleaning water is concentrated and delivered to the reinforcement cleaning part.

[0167] The above reinforcement administration can be added at the end of each washing course included in the above washing modes.

[0168] In addition, the difference in operating conditions of the washing motor and heating heater used in the washing stroke of each washing course included in the standard mode and low-noise mode as described above can be applied to the reinforcement stroke in the same way.

[0169] The following explanation is limited to the premise that the optical sensor is a thermal imaging camera.

[0170] Referring to FIGS. 6 and FIGS. 8, a plurality of thermal imaging cameras (111) may be provided inside the tub (108). That is, a thermal imaging camera (111) for photographing tableware contained in the upper rack (101) may be located at the top of the upper rack (101), and a thermal imaging camera (111) for photographing tableware contained in the lower rack (102) may be located in the middle of the lower rack (102) and the upper rack (101).

[0171] Additionally, a thermal imaging camera (111) may be provided on one side of the inside of the tub (108). That is, a groove may be formed on the inner side of the tub, and the thermal imaging camera (111) may be placed inside the formed groove. The formed groove may be treated so that the inner side of the tub is not curved using a shield. The shield may be made of a transparent material, such as glass or plastic, so that the inside of the tub can be photographed from inside the groove.

[0172] As described above, by placing the thermal imaging camera (111) inside the home, the possibility of the camera being damaged or physically broken by the dishwashing operation of the dishwasher (10) can be reduced. Additionally, by removing the curvature of the inner surface of the tub (108) through the shield, the camera can be protected and foreign matter can be prevented from getting stuck in the camera lens.

[0173] In one embodiment of the present specification, a thermal imaging camera (111) may be provided on the inner surface of the door (12). That is, a groove may be formed on the inner surface of the door (12), and the thermal imaging camera (111) may be placed inside the formed groove. The formed groove may be treated so that the inner surface of the door (12) is not curved by using a cover.

[0174] Accordingly, the dishwasher (10) of the present specification can photograph dishes from various angles by installing a plurality of thermal imaging cameras (111) on the inner surface of the door (12) and the tub (108). Accordingly, the dishwasher (10) can generate various thermal images and, furthermore, can calculate accurate temperature values ​​and emissivity to perform customized operations according to the type of dishes.

[0175] The home appliance control unit (110) sequentially performs operations related to washing dishes according to a preset order and controls the operation of the dishwasher (10). When the thermal imaging camera (111) captures a first thermal image and a second thermal image at different times, the home appliance control unit (110) stores the captured first thermal image and second thermal image in the image storage unit (113).

[0176] The home appliance control unit (110) can calculate a first temperature value and a second temperature value from the first thermal image and the second thermal image stored through the temperature calculation unit (114), respectively. The thermal image is a thermal image that detects heat by detecting infrared rays emitted from the tableware and visually displays the temperature distribution of the tableware by expressing it in different colors according to the temperature so that it can be visually confirmed.

[0177] For example, tableware within a thermal image can be represented in different colors depending on the temperature, in a gradient ranging from low temperatures in blue to high temperatures in red.

[0178] Meanwhile, the temperature inside the tub gradually rises during the washing process. Therefore, as time passes, the heat generated from the dishes also changes, so the first temperature value and the second temperature value have different values.

[0179] The home appliance control unit (110) performs a first operation, and when the first operation is completed, calculates a first temperature value of the tableware contained in the rack, performs a second operation, and when the second operation is completed, calculates a second temperature value of the tableware contained in the rack (101, 102), calculates the emissivity of the tableware contained in the rack (101, 102) based on the first temperature value and the second temperature value, and can determine a third operation based on the emissivity.

[0180] FIG. 8 is a flowchart showing the step-by-step operation sequence of a dishwasher according to an embodiment of the present invention.

[0181] Referring to FIG. 8, a dishwasher (10) according to an embodiment of the present invention can operate in the steps of pre-washing, main washing, rinsing, heated rinsing, and drying.

[0182] As described above, the above cleaning can be applied equally to each cleaning course included in the standard mode or low-noise mode.

[0183] When a user loads used dishes onto the racks (101, 102) of the dishwasher (10), food residue may remain on the dishes. Therefore, the dishwasher (10) can perform a pre-wash (S101) as the first step. During the pre-wash (S101) step, the detergent is not guided toward the lower side of the tub, so large food particles among the food stuck to the dishes are removed first using only washing water without detergent.

[0184] The dishwasher (10) performs a main wash (S103) process after the pre-wash (S101) is finished. When the dishwasher (10) performs the main wash (S103) of the dishes using only wash water without detergent, the grease stains on the dishes are not washed well, so the dishes are washed by removing grease stains through the main wash using detergent.

[0185] When the main wash (S103) is finished, the dishwasher (10) discharges the used wash water to the outside through the sump (106) and supplies new wash water to perform the rinsing (S105) process.

[0186] Afterwards, the dishwasher (10) performs a heated rinse (S107) operation using high-temperature heated washing water, thereby rinsing the dishes once again and simultaneously raising the temperature of the dish surface so that moisture on the dish surface can easily evaporate in a short time.

[0187] Finally, the dishwasher (10) dries the dishes by performing a drying (S109) process and completes all steps required for dishwashing.

[0188] FIG. 9 is a diagram showing a basic conceptual diagram of a washing course change according to an embodiment of the present invention.

[0189] Referring to FIG. 9, the basic operation for changing the washing course according to an embodiment of the present invention is to first select a washing course corresponding to a standard mode through the operation of a terminal application (ThinQ App) on a user terminal (20) and transmit it to a dishwasher (10).

[0190] Here, selection information from the user terminal (20) can be transmitted directly to the dishwasher (10) wirelessly, or it can be transmitted to the dishwasher (10) via the management server (30).

[0191] Additionally, the user can set a no-disturb time from the user terminal (20) and transmit it to the dishwasher (10), or transmit it to the dishwasher (10) via the management server (30).

[0192] In addition, the user can directly set the do not disturb time by touching the display module.

[0193] The above Do Not Disturb time is a period during which the user is not disturbed while resting or sleeping.

[0194] The above do-not-disturb time is the time required to maintain the user's consistent biological rhythm or condition.

[0195] Therefore, if the user sets a no-disturb time, the dishwasher (10) can switch to a low-noise course immediately without any separate operation when the no-disturb time is reached, even while washing dishes in each washing course of the standard mode.

[0196] For example, if the user cannot rest due to noise generated while performing one of the processes included in one of the standard washing courses, such as pre-wash, main wash, rinse, heat rinse, and drying, or if the user is concerned that the noise or vibration may cause harm to the user's neighbors because the dishwasher is used at night, the user may set the time as a no-disturb time.

[0197] The above do not disturb time may consist of a start time and an end time.

[0198] When the above-mentioned do not disturb time expires while the dishwasher is running a standard mode wash course, the wash course can be moved to the beginning of the wash course of the low-noise mode wash course corresponding to that wash course.

[0199] Conversely, if the end time of the no-disturb time elapses while washing is in progress in the above-mentioned low-noise mode, the washing course can be moved to the beginning of the corresponding washing stroke of the standard mode washing course that corresponds to the washing stroke of the washing course currently in progress.

[0200] The dishwasher can be adjusted so that the noise difference during the washing cycle between the standard mode and the low-noise mode is approximately 4 dB.

[0201] FIG. 10 is an operation flowchart for explaining a cleaning course control method of a management server according to an embodiment of the present invention.

[0202] Referring to FIG. 10, the management server (30) according to an embodiment of the present invention can receive a washing mode change signal from a user terminal (20) through a server communication unit (310).

[0203] Next, the server control unit (320) checks the washing process performed by the dishwasher (10) at the time of receiving the washing mode signal.

[0204] Here, the dishwasher (10) transmits packet data regarding the operating status to the management server (30) at regular intervals.

[0205] The management server (30) recognizes the current operating status of the dishwasher (10) through packet data related to the operating status received from the dishwasher (10).

[0206] Accordingly, the management server (30) recognizes the state of the washing process of the dishwasher (10) at the time of receiving a course change signal from the user terminal (20).

[0207] Next, the server control unit (320) can generate information about the washing motor and heating heater corresponding to the recognized washing process.

[0208] Next, the server control unit (320) transmits the generated washing course control command to the server communication unit (310).

[0209] Next, the server communication unit (310) transmits the washing course control command received from the server control unit (320) to the dishwasher (10).

[0210] For example, when the server control unit (320) receives a course change signal, if it is confirmed that the washing process executed by the dishwasher (10) is a pre-wash process which is one of the standard mode washing courses, it can generate a washing course control command to change in real time to a low-noise course in which the amount of noise reduction generated in the standard course of the pre-wash process is 3.7 to 4.0 decibels (dB).

[0211] At this time, the amount of noise reduction for each washing cycle of the dishwasher (10) is stored as data in the server storage unit (330).

[0212] In addition, the dishwasher (10) also stores the noise reduction amount for each washing cycle as data in the storage unit (150), identical to the noise reduction amount stored in the server storage unit (330) of the management server (30). For example, the noise reduction amount for each washing cycle can be stored in the storage unit (150) as 3.7 to 4.0 decibels (dB) for the pre-wash cycle, 3.6 to 5.0 decibels (dB) for the main wash cycle, 3.9 decibels (dB) or more for the rinse cycle, and 3.0 to 4.2 decibels (dB) for the heat rinse cycle.

[0213] The biggest source of noise in the dishwasher (10) is the rotation speed (rotation per minute) of the washing motor executing the washing cycle. Therefore, the dishwasher (10) reduces the rotation speed of the washing motor so that the noise reduction amount becomes 3.7 to 4.0 decibels (dB) based on the noise reduction amount stored in the storage unit (150) according to the washing course control command received from the management server (30) during the pre-wash cycle.

[0214] FIG. 11 illustrates an example of a washing mode change per unit stroke of a dishwasher according to an embodiment of the present invention, showing that when a mode change signal is received during the washing stroke of a standard mode unit washing course or when the no-disturb time set by the user is reached, the washing stroke is automatically changed to a low-noise mode washing stroke corresponding to the washing stroke of the unit washing course by compensation matching.

[0215] The details summarized here are explained in Table 1, and to prevent a change in cleaning performance due to the above mode switching, it is possible to move to the starting point of the corresponding unit cleaning course cleaning stroke when the above mode is changed.

[0216] Figure 11 and Table 1 are described based on the transition from standard mode to low-noise mode, but this can be applied equally when switching from low-noise mode to standard mode.

[0217]

[0218] Classification Change Point Compensation Matching 1. Main Wash 1: Change by Stroke Unit (Second / Mid / End) Start time of Stroke Change 2. Main Wash 2: Second / Mid / End 3. Rinse: Second / Mid / End 4. Heating Rinse 1: Second / Mid / End 5. Heating Rinse 2: Second / Mid / End

[0219]

[0220] For example, when the dishwasher (10) receives a washing mode change signal at the middle stage among the beginning, middle, and end stages of the main washing 1 cycle, or reaches the no-disturb time (change point = middle stage), it can automatically switch to a washing cycle of a low-noise mode washing cycle corresponding to the standard mode washing cycle, and at this time, it can move to the starting point of the washing cycle being switched.

[0221] As mentioned above, this can be applied equally to the opposite situation.

[0222] That is, when the dishwasher is operating in one of the low-noise mode washing courses and the washing process is in progress, if a washing mode change signal is received or the do-not-disturb time has elapsed, it may move to the starting point of the washing process corresponding to the standard mode, regardless of the progress of the washing process in progress.

[0223] A dishwasher (10) according to an embodiment of the present invention can change parameters such as the rpm of the washing motor, washing time, temperature, and Vario at the time of real-time change of the low-noise mode based on the standard course. Here, rpm represents the rotation speed of the washing motor (rotation per minute) for one minute. The dishwasher (10) may include a washing motor for operating the washing pump, a drain motor for operating the drain pump, and a variant motor for switching the flow path of the variant valve.

[0224] The dishwasher (10) can control the spray position and amount of spray from the spray nozzle that sprays washing water by controlling the vario valve through the vario motor.

[0225] FIG. 12 is a diagram showing an operation flowchart to explain a washing course control method of a dishwasher according to an embodiment of the present invention.

[0226] FIG. 13 is a diagram showing the noise reduction level at the time of change for each stroke unit of a dishwasher according to an embodiment of the present invention.

[0227] FIG. 14 is a diagram showing the standard course noise by stroke unit of a dishwasher according to an embodiment of the present invention, and FIG. 15 is a diagram showing an example of noise reduction at the time of change by stroke unit of a dishwasher according to an embodiment of the present invention.

[0228] Referring to FIGS. 14 and 15, the dishwasher (10) according to an embodiment of the present invention shows that, even though the dirt impact spray force is reduced to reduce washing noise, the washing time, washing temperature, etc. are appropriately changed, the same washing performance as the standard mode can be maintained in a low-noise mode.

[0229] FIG. 16 illustrates the washing mode conversion and return logic of a dishwasher according to an embodiment of the present invention.

[0230] Referring to FIG. 16, a dishwasher (10) according to an embodiment of the present invention can receive a washing mode, a washing course, and a no-disturb time from an input unit.

[0231] Subsequently, the dishwasher function execution unit can perform a washing process by adjusting the washing water spray pressure, washing motor speed, washing motor duration, heating heater temperature, heating heater duration, etc., corresponding to the washing course of the selected mode according to the input information.

[0232] For example, if the user-set no-disturb time is reached during the washing process of the standard mode washing course, it can be switched to a corresponding low-noise mode washing course.

[0233] As described above, at this time, the control unit can automatically move to the starting point of the corresponding washing stroke of the low-noise mode washing course and proceed with dishwashing.

[0234] Conversely, for example, if the user-set do not disturb time elapses during the washing process of the low-noise mode washing course, the washing course can be switched to the corresponding standard mode washing course.

[0235] As described above, at this time, the control unit can automatically move to the starting point of the corresponding washing stroke of the standard mode washing course and proceed with dishwashing.

[0236] This is because there are limitations in quantifying and measuring the washing status of dishes based on the washing process.

[0237] Figure 17 shows the logic for changing the washing mode according to the user's change command.

[0238] When a washing mode change signal is received while a washing course of a washing mode selected according to the initially set information is in progress, the control unit automatically switches to a washing course of a changed mode corresponding to the washing course of the washing course in progress, as described in FIG. 16.

[0239] In this case as well, you can proceed with the cleaning by moving to the starting point of the corresponding cleaning process of the changed cleaning mode.

[0240] The low-noise mode washing course corresponding to the washing course included in the above standard mode has a longer washing time than the above standard mode washing course, or increases washing efficiency by raising the temperature of the heating heater, thereby achieving the same washing effect even if the rotational speed of the washing motor is lowered.

[0241] An embodiment of the present invention is executed by classifying into a standard washing mode and a low-noise washing mode. The standard washing mode and the low-noise washing mode are composed of washing courses such as a powerful course and a delicate course, and a plurality of washing strokes constituting each washing course, allowing the user to select a washing course suitable for their needs and circumstances.

[0242] The washing stroke of the above washing course can be distinguished through changing parameters such as the washing motor's rpm, washing time, temperature, and Vario.

[0243] The user can monitor the dishwashing status in real time via a user terminal through a camera installed in the dishwasher, and if there are parts requiring reinforcement cleaning, this information can be transmitted to the dishwasher input unit to perform additional cleaning on the parts requiring reinforcement after the current washing cycle is completed.

[0244] At this time, the control unit can drive the vari valve to the area requiring reinforced cleaning to aim the nozzle position and increase the cleaning water pressure to perform more precise cleaning.

[0245] In standard mode, washing courses such as general course, strong course, and delicate course, and the main washing course, rinsing course, and heated rinsing course of each course, can be applied to each washing course and each washing course corresponding to the low-noise mode.

[0246] Information required for the operation of the washing process included in the washing course of each of the above modes can be stored in the dishwasher storage unit or management server and used.

[0247] Driving information for each administration according to an embodiment of the present invention can be applied differently depending on each region, such as a continent or country, and can be applied differently depending on the climate or season, such as hot weather, cold weather, rainy weather, or snowy weather.

[0248] In addition, according to the present invention, even though the contaminant impact spray force is reduced to reduce washing noise by changing to a low-noise mode during the operation of a standard mode washing course, the washing performance can be maintained at an equivalent or higher level by adjusting the heating temperature, washing motor operation duration, etc.

[0249] In addition, according to the present invention, when a user selects a low-noise mode with simple operation, the dishwasher automatically lowers the impact spray pressure, increases the washing time, and raises the washing temperature (soaking energy) to execute a low-noise course, thereby improving user convenience.

[0250] Although the present invention has been described above with reference to the illustrated drawings, the present invention is not limited by the embodiments and drawings disclosed in this specification, and it is obvious that various modifications can be made by a person skilled in the art within the scope of the technical concept of the present invention. Furthermore, even if the effects of the configuration according to the present invention were not explicitly described while explaining the embodiments of the present invention above, it is natural to acknowledge that the effects predictable by said configuration should also be recognized.

Claims

1. Input section for receiving the washing course and low-noise setting time; A storage unit for storing washing-related parameters for a washing course; and A control unit that, when a washing course is input, selects parameters corresponding to the washing course from the storage unit and controls the execution of the washing course; is included. A dishwasher characterized by the above-described control unit changing parameters so that when a preset low-noise mode start time is reached during the progress of the washing course, the washing course switches to a low-noise mode washing course and operates.

2. In Claim 1 A dishwasher characterized in that the washing course is divided into a standard mode and a low-noise mode, and each mode is configured to include at least one of a pre-wash cycle, a main wash cycle, a rinse cycle, a heat rinse cycle, and a drying cycle.

3. In Claim 2 A dishwasher characterized in that, when the above-described control unit switches to a low-noise mode washing course, it switches to the beginning of each stroke of the low-noise mode corresponding to the stroke of the standard mode washing course performed immediately prior.

4. In Claim 1 A dishwasher characterized in that the above parameters include at least one of the washing motor rotation speed and operating time and the heating temperature and operating time of the heating heater.

5. In Claim 1 A dishwasher characterized by the above-described control unit changing parameters to switch to the standard mode washing course and operate when a preset low-noise mode end time is reached during the low-noise washing mode washing course.

6. In Claim 5 A dishwasher characterized by the above-described control unit switching to the beginning of each stroke of the low-noise mode washing course that was performed immediately prior when the standard washing mode washing course is switched.

7. In Claim 1 The above input unit is characterized by including a voice input unit for receiving a voice signal, a communication unit for receiving an input signal via a communication network from a user terminal or a management server, a remote receiver for receiving an input signal wirelessly from a remote controller, and a user interface unit for direct input by a user to the dishwasher.

8. In Claim 7 A dishwasher characterized in that the control unit turns off the display and speaker functions while operating the low-noise mode washing course.

9. In Claim 1 A dishwasher characterized by the above-described control unit reducing the speed of the washing motor for each stroke of the low-noise mode washing course compared to each stroke of the corresponding standard mode washing course, while increasing the washing time and setting the washing water temperature higher to maintain the same washing performance as the standard mode washing course.

10. In Claim 7 A dishwasher characterized in that the control unit immediately switches the ongoing washing course mode when a washing course change command is input through the input unit while the washing course is running.

Images