KR20080105932A - Refrigerator - Google Patents

Abstract

A refrigerator is provided to carry out both food management and DMB display via a DMB module for the sake of user's convenience. A refrigerator includes a body part formed with a plurality of storage spaces and mounted with doors for opening or closing the spaces, wherein a receiving groove for a DMB display device(20) is formed in a front surface of the door. A main control part(19) controls refrigerating cycles for the storage spaces. The DMB display device is mounted in the receiving groove of the door and connected to the main control part electrically so as to be supplied with power and receive data on the operation states of the refrigerator, thereby display the data as well as DMB contents. The DMB display device receives the data via wireless communications with the main control part even though detached from the refrigerator.

Description

Refrigerator {REFRIGERATOR}

1 is a front view and a partially enlarged view of a refrigerator according to the present invention.

2 is a configuration diagram of the refrigerator of FIG. 1.

3 is a partial perspective view of the refrigerator and the display device when the refrigerator according to the present invention is separated.

<Description of the symbols for the main parts of the drawings>

10: main control unit 20: display unit

The present invention relates to a refrigerator, and more particularly, to a refrigerator having a food storage management function and a DMB function.

In general, a refrigerator is a device that can keep food fresh for a certain period of time by lowering the freezing compartment or the refrigerating compartment while repeating a refrigeration cycle in which the refrigerant is compressed, condensed, expanded, or evaporated.

Such a refrigerator includes a compressor for compressing a refrigerant into a gas refrigerant having a high temperature and high pressure, a condenser for condensing the refrigerant passing through the compressor with a high temperature and high pressure liquid refrigerant, and an expansion valve for reducing the refrigerant passing through the condenser with a low temperature and low pressure liquid refrigerant. And a refrigerating cycle having an evaporator as a basic component that absorbs heat in the freezing compartment or the refrigerating compartment and keeps the temperature inside the freezing compartment or the refrigerating compartment at a low temperature while evaporating the refrigerant passing through the expansion valve to a low-temperature low-pressure gas refrigerant.

Recently, side-by-side refrigerators are not only to satisfy various needs of the user, but also to prevent cold air loss. An ice extractor capable of extracting cold water or ice is integrally formed on the freezer door side. The home bar is formed so that the stored beverage or water can be easily taken out even if the refrigerator door is not opened or closed.

The conventional refrigerator includes control devices including a main microcomputer (or main controller) mounted on an upper side of a main body and a sub microcomputer included in a display device fixedly mounted to a refrigerator door. The display device displays the service type of the dispenser (eg, ice, water, flake ice), the set temperature of the freezer compartment, and the set temperature of the refrigerating compartment in a state in which the display device is fixedly mounted in the receiving groove of the refrigerator door. It is provided.

Such conventional refrigerators do not provide various functions (for example, food storage management function and DMB function).

An object of the present invention to provide a refrigerator that can perform a food storage management function and a DMB function to the user.

In addition, an object of the present invention is to provide a refrigerator that can be detachably attached to the display device, the state of the refrigerator, the food storage management function and the DMB function can be provided to the user more conveniently.

In addition, an object of the present invention is to provide a refrigerator that can detect the detachment and mounting of the display device and correspondingly select a communication method.

Hereinafter, the present invention will be described in detail by taking a refrigerator as an example based on the embodiments of the present invention and the accompanying drawings.

1 is a front view and a partially enlarged view of a refrigerator according to the present invention, Figure 2 is a block diagram of the refrigerator of FIG.

As shown in FIG. 1, the refrigerator 1 according to the present invention is formed such that a freezer compartment and a refrigerating compartment are partitioned at both sides in a refrigerator body 2 having an open front side, and a freezer compartment door at each front side of the refrigerator body 2. 4a) and the refrigerating compartment door 4b are hinged to open and close, and a dispenser 3 and a display device 20 are mounted on the front side of the refrigerating compartment door 4a.

Here, the refrigerator main body 2 is formed so that the freezer compartment and the refrigerating compartment are partitioned on both sides by a partition wall (not shown), and a cold air circulation fan (not shown) for blowing an evaporator (not shown) and cold air may be built into the inner wall thereof. In addition, a cold air supply hole (not shown) is formed to allow the cold air around the evaporator to be supplied to the freezing compartment and the refrigerating compartment for circulation.

One side upper and lower ends of the freezer compartment door 4a and the refrigerating compartment door 4b are hingedly connected to the refrigerator body 2 by the hinge covers 9a and 9b to be opened and closed.

In particular, a rectangular accommodating groove is formed in the outer front side of the refrigerating compartment door 4a, and the display apparatus 20 is positioned in the accommodating groove to be detachable and mounted.

Of course, the display device 20 not only displays a control menu for the refrigerator (selection and display of the service type of the dispenser, input and display of the set temperature of the freezer and the refrigerating compartment, etc.), but also the present temperature, the current date and time, and the weather. In addition to displaying information, it is also configured to display sound.

As shown in FIG. 2, the refrigerator 1 controls the refrigerator to generate and supply cold air to the freezer compartment and the refrigerating compartment, and controls the main refrigerator 10 to control the entire refrigerator 1, and a detachable refrigerator. The display device 20 performs a display of status and a control input by a user.

These main control devices 10 and the display device 20 are connected to data lines DL1 and DL2 and power lines PL1 and PL2 through a hinge including a hinge axis (not shown) of the refrigerating compartment door 4a. Each is connected for communication and power supply. Usually, the main control apparatus 10 is mounted on the upper side of the main body 2 with less space constraint on the main body 2.

First, the main controller 10 receives an external commercial power supply (generally 220V) and reduces the voltage to a driving voltage having a predetermined size to supply the driving voltage, and the driving voltage from the power supply unit 11. The driving unit 12 for driving the cooling cycle by operating the compressor, controlling the fan circulating cold air in the freezer compartment and the refrigerating compartment, and the first and second communication units performing wireless communication with the display apparatus 20. 13a and 13b, a sensing unit 14 for detecting whether the display apparatus 20 receives the driving power from the power source unit 11, a power line PL1 for supplying the driving power to the display apparatus 20, and The control unit 19 controls the operation of the entire freezer compartment and the refrigerating compartment by controlling the connection unit 15 to which the data line DL1 for wired communication is connected, and controlling the driving unit 12 to perform cooling. However, the driving voltage from the power supply unit 11 is also supplied to other necessary components of the main control device 10, and this supply method is only an obvious technique for those skilled in the art.

The power supply unit 11 included in the main control device 10 may reduce the external commercial power supply of 220V to, for example, 12V and supply the same to the display device 20 through the power line PL1. Supply the required magnitude of voltage to the required components.

The driving unit 12 is a component that performs the control of the compressor and the control of the fan motor to generate and circulate the cold air in the freezer compartment and the refrigerating compartment.

The first and second communication units 13a and 13b are components for performing communication according to a plurality of wireless communication methods between the main control apparatus 10 and the display apparatus 20. The first and second communication units 13a and 13b may be an RF communication device such as bluetooth, Zigbee, or the like, or a short range communication device such as IrDA. However, the main control apparatus 10 includes at least one of the first and second communication units 13a and 13b so that the display apparatus 20 and the main control apparatus may be removed even when the display apparatus 20 is detached. (10) communication is performed.

When the display unit 20 is mounted in the receiving groove, the sensing unit 14 is connected to the display unit 20 by the connection unit 15, and when the driving voltage of the power supply unit 11 is provided to the display apparatus 20. The sensor senses the supply and interruption of this drive voltage. When the driving voltage is supplied to the display apparatus 20 by the sensing of the sensing unit 14, the control unit 19 is configured to mount the display apparatus 20 in the receiving groove, that is, the refrigerator main body 2. To judge. In addition, when the driving voltage is not supplied to the display apparatus 20 by the sensing of the sensing unit 14, the controller 19 is the display apparatus 20 detached from the receiving groove, that is, from the refrigerator main body 2. It is determined that it is detached.

The connection part 15 is connected to the power line PL1 and the data line DL1 and is coupled to the connection part 28 of the display apparatus 20 to supply the driving voltage through the power line PL1 and to supply the data line DL1. The wired communication is made through a kind of male / male connector or port.

The power line PL1 supplies a driving voltage of the power supply unit 11 and should be understood to include a ground line. In addition, the data line DL1 is for wired communication and may be, for example, an RS-232 communication medium.

The controller 19 stores humidity, temperature, and the like in the freezer compartment and the refrigerating compartment in the freezer compartment and the refrigerating compartment, and stores the set temperatures and operation modes of the freezer compartment and the refrigerator compartment that are input and transmitted by the user from the display apparatus 20. . The control unit 19 controls the drive unit 12 to circulate cold air in the freezer compartment and the refrigerating compartment, thereby performing the stored operation information.

The control unit 19 is a state in the freezer compartment and the refrigerator compartment (for example, the current temperature of the freezer compartment, the current temperature of the refrigerator compartment, the service type of the dispenser, etc.) and operation information (eg, the set temperature of the freezer compartment, the set temperature of the refrigerator compartment, the dispenser) And service forms) and the like, and may have a separate storage unit or be embedded therein.

The control unit 19 is capable of wired communication with the display apparatus 20 through the data line DL1 to transmit information data including the current state and / or operation information of the freezer compartment and the refrigerating compartment, or the freezer compartment door 2a or the like. Send information data and the like about being open. In addition, the controller 19 receives and stores information data including operation information (for example, set temperatures and service types of the freezer compartment and the refrigerator compartment) input by the user.

In addition, when the display apparatus 20 is mounted on the refrigerator main body 2, the controller 19 may control the display apparatus 20 through the display apparatus 20 and the data line DL1 or the first and second communication units 13a and 13b. Send refrigerator status information. In addition, the controller 19 receives a control command input by the user from the display apparatus 20 and performs control corresponding thereto.

As described above, the controller 19 sets a communication method between the display apparatus 20 and the main control apparatus 10 so that the communication according to it is performed.

Next, the display apparatus 20 receives the driving voltage from the power supply unit 11 through the power line PL2 and decompresses and provides the power to a plurality of used power sources, and the charging unit 21b and the user. An input unit 22 for receiving an input from the LCD, an LCD 23 for displaying the state and / or operation information of the refrigerator by the light generated by the backlight 25, and a state and / or operation information for the refrigerator. A screen control unit 24 for converting the display signal to be displayed on the display unit 23 to control the LCD 23, a backlight 25 for generating light, a speaker unit 26a for emitting light, and sound and / Or an audio unit 26 including a microphone 26b for acquiring voice, a DMB module 27 for receiving a digital multimedia broadcasting (DBM) signal and providing a digital signal to the controller 30, and a main control device 10. Is connected to the connection part 15 of the The connection unit 28 to be performed, the first and second communication units 29a and 29b to perform wireless communication with the main controller 10, and the state and / or operation of the refrigerator received from the main controller 10 The control unit 30 displays information, transmits a control command input from the user to the main control device 10, and performs a food storage management mode and a DMB broadcasting mode by the user's selection. However, the driving voltage from the power supply 21 consisting of the power supply 21a and the charging unit 21b is also supplied to other necessary components of the display apparatus 20, and such a supply method is a person familiar with the technical field to which the present invention belongs. It's just an obvious technique.

In detail, the power supply unit 21a is supplied with a supply power of 12 V, for example, and supplied to the backlight 25 as it is, and used as a power supply having a plurality of sizes (for example, 5 V, 3.3 V, and 1.8 V). The pressure is supplied to the required components. The charging unit 21b has the display device 20 mounted on the refrigerator main body 2 to charge the driving voltage applied from the power supply unit 11 so that the display device 20 is detached from the refrigerator main body 2 and driven from the outside. When no voltage is supplied, the same power supply function as that of the power supply unit 21a is performed.

The input unit 22 is installed at the periphery of the LCD 23 and can be easily input by the user. The input unit 23 is a button type or a touch pad type, and the number and type of the buttons are set in relation to the user interface.

The input unit 22 includes temperature setting means 22a for setting the temperature of the freezer compartment and the refrigerating compartment, dispenser setting means 22b for setting the service type of the dispenser (ice ice, water, flake ice, etc.), and the LCD 23. Menu means 22c for activating and selecting a user interface (setting of a refrigerator, controlling a refrigerator, displaying a food storage management mode, displaying a screen of DMB screens, channels, etc.) and performing a food storage management mode. A food storage button 22d for displaying the food, a DMB button 22e for executing the DMB broadcasting mode, a previous screen button 22f for displaying the previous user interface of the currently displayed user interface, and other means for selection. 22g to 22j, and a menu / selection button 22k for checking and selecting information displayed on the LCD 23, and the like.

The LCD 23, the screen controller 24, and the backlight 25 display a user interface, a DMB broadcast, a screen related to food storage management, a state of a refrigerator, and / or control information. This user interface may be the background on which the avatar is displayed. In addition, the user interface may additionally display information regarding the refrigerator state simultaneously or separately from the avatar (see FIG. 2). As shown in FIG. 2, the LCD 23 displays an avatar (bear figure) 33 and basic information 31 of the refrigerator as a basic screen, and displays weather information (or weather conditions of the day) and the current day ( 32).

The speaker 26a expresses a voice recognition guide and the like as a sound during the food storage management mode, and the microphone 26b is mounted on the front of the refrigerator 1 so as to easily obtain a user's voice. Alternatively, the sound is applied to the controller 30.

The DMB module 27 tunes a DMB signal of a channel desired by a user input through the input unit 22 under the control of the controller 30 among the DMB signals received through an antenna mounted on the display apparatus 20. And a baseband 27b which amplifies and converts the DMB signal transmitted from the tuner 27a into a baseband signal, converts it into a digital signal, demodulates it, and transmits the demodulated digital signal to the control unit 30. Is done. The baseband 27b also performs deinterleaving and error correction on the demodulated digital signal received from the tuner 27a.

The connection part 28 may be configured as a male / male connector or a port corresponding to the connection part 15 of the main control device 10. When the display device 20 is mounted to the refrigerator main body 2, the connection part is provided. Coupled with (15), electrical connection is made through coupling between power line PL1 and PL2 and coupling between data line DL1 and DL2.

The first and second communication units 29a and 29b are communication means corresponding to the first and second communication units 13a and 13b of the main control device 10, and implement at least one wireless communication scheme. Component.

The controller 30 basically communicates with the main control apparatus 10 to display the state and / or operation information of the refrigerator and transmits a control command of the refrigerator selected by the user to the main control apparatus 10. . The control unit 30 performs communication according to the communication method set by the main control device 10. That is, when the main control device 10 starts the wired communication by the data lines DL1 and DL2, the wired communication is performed accordingly, and the first and second communication units 29a and 29b perform the wired communication. Do not perform wireless communication. This is because it is desirable that the main control device 10 not only detects detachment and mounting of the display device 20 but also quickly recognizes the state of all devices at all times.

If there is no user input for the food storage button 22d or the DMB button 22e, the controller 30 causes the LCD 23 to display a basic screen including the refrigerator state. The display of the refrigerator state may be a mounting state in which the display device 20 is coupled to the refrigerator main body 20 and the connection part 15 and the connection part 28 are electrically connected, or the display device 20 is connected to the refrigerator main body 20. It also takes place in a detached state. In particular, since the controller 30 stores information regarding the refrigerator state in a detached state or a mounted state, the controller 30 may always display the refrigerator state.

In addition, the controller 30 stores DMB screen information for performing the DMB mode. When the user presses the DMB button 22e, the DMB screen information includes a user interface screen such as a DMB operation start screen, a channel selection screen, and a volume selection screen. In addition, the controller 30 includes a decoding function for decoding a digital signal received from the DMB module 27 and transmitting a signal (DMB screen) that can be processed by the screen controller 24.

In addition, the controller 30 performs a food storage management mode when the user operates the food storage button 22d. Accordingly, the control unit 30 stores the food storage management information for performing the food storage management mode for storing and managing information (or food, etc.) information stored in the freezer compartment and the refrigerator compartment. The food storage management information stores information for performing a food information storage mode, a food information search mode, a food information deletion mode, and a food information notification mode.

First, the food information storage mode is for storing food information (food name, storage period, number or quantity, etc.) input by the user, and displays a screen for storing food information and a list of foods the user wants to save. And a screen for allowing the user to select a date for storing the storage deadline of the food to be stored (for example, a calendar screen).

In the food information search mode, when the user wants to check the information on the food currently stored in the refrigerator 1, a screen displaying information (food list list, etc.) corresponding to the food name input by the user is displayed on the screen. And a screen for allowing a user to select a storage deadline for the food retrieved by the user.

The food information deletion mode is for deleting food information selected through a food information search mode, and the like, and includes a screen including a selection of a target to be deleted, a selection of deletion, a deletion cancellation, and the like.

Finally, the food information notification mode is a mode in which the control unit 30 reads pre-stored food information, and provides the user with information about foods having exceeded the pre-stored storage period. The food information notification mode includes a screen for displaying food items that have exceeded their storage deadline, a screen for deleting these food items, and a screen for selecting a new storage deadline for foods that have exceeded their storage deadline.

The above-mentioned food information storage mode, the food information search mode and the food information deletion mode are performed depending on the input from the user, and the food information notification mode is performed after the user or automatically selects the notification mode. It is a service which the control part 30 independently provides.

In addition, the control unit 30 has a built-in timer for calculating the current date and time, etc., it is possible to determine the extent of the storage period of the food.

The refrigerator 1 of the present invention may perform an input through the input unit 22 and a voice recognition input for recognizing a user's voice in order to perform the food storage management mode. Input by the input unit 22 is as described above.

For voice recognition input, the controller 30 includes a voice recognition module (or voice recognition algorithm). The voice recognition module receives a user's voice (or voice signal) from the microphone 26b under the control of the control unit 30, and recognizes the voice as information (for example, text, numbers, characters, etc.) corresponding to the voice. By means of identification. The speech recognition module may be configured in hardware, in software, or in firmware. The controller 30 may display the information identified by the voice recognition module as characters (including numbers, letters, etc.) on the LCD 23.

In addition, when the food storage button 22d is operated, the controller 30 may preferentially perform a voice recognition input function. At this time, the controller 30 notifies the user through the speaker 26a that the voice recognition function starts immediately. In addition, the controller 30 may not read the voice from the microphone 26b through the voice recognition module for a predetermined time after notifying the start of the voice recognition function.

3 is a partial perspective view of a refrigerator and a display device according to the present invention separated;

As shown in FIG. 3, the display apparatus 20 may be attached to or detached from the receiving groove 5 formed above the dispenser 3 of the freezer compartment door 4a. The display apparatus 20 includes a connecting portion 28 on one side of the main body of the display apparatus for electrical coupling with the connecting portion 15 of the main control apparatus 10 on one side. The connection part 15 of the main control device 10 is mounted at one side of the accommodation groove 5, and when the display device 20 is inserted into and mounted in the accommodation groove 5, the connection part 15 and the connection part 28 are provided. Is connected to allow data communication and power supply.

The first and second communication units 13a and 13b of the main control device 10 are equipped with an appropriate element in the receiving groove 5 for transmitting and receiving data according to a communication method, for example, when performing infrared communication. Should be. This degree of change is only a matter of course recognized by those skilled in the art to which the present invention pertains.

However, the scope of the present invention is not limited by the above embodiments and drawings.

In the following, various aspects of the claimable invention are described. The following description forms a part of the detailed description of the present invention, and the refrigerator according to the spirit or the present invention can be grasped from various viewpoints, and a detachable digital multimedia display apparatus for a refrigerator. It should be understood as a minimum description of examples, and not as a boundary limiting the invention.

The refrigerator according to claim 1 of the present application has a refrigerator body having a plurality of storage spaces for storing an object, a refrigerator door which opens and closes the storage space, and a receiving groove of a digital multimedia broadcasting (DMB) display device is formed on the front surface thereof. The main control unit for driving and controlling the cooling cycle of the storage space and the main control unit for the storage space can be attached and detached and electrically connected to the main control unit. In the case of detachment, wireless communication with the main control unit is performed, and the refrigerator state information is applied, and the display unit displays the state of the refrigerator. The display unit displays the refrigerator state information. Ensure power is supplied at the time.

The DMB display apparatus according to claim 2 of the present invention has a DMB module for receiving a DMB, a DMB button for selecting a mode of the DMB, and interlocks with the user input of the DMB button to display the currently displayed information in the DMB mode. The DMB broadcast can be displayed by converting the data to a display on the display.

The DMB display device according to claim 3 of the claim is provided with a microphone unit for acquiring voice and generating voice data, a voice recognition module for reading voice data input through the microphone unit, and food management according to the read voice data. It is provided with a control unit to perform, so that the food management by the voice recognition.

It is preferable that the control unit described in claim 4 at the time of filing shows the information on the read audio data.

It is preferable that the main control unit according to claim 5 at the time of filing has a sensing unit for detecting detachment and mounting of the DMB display device.

The main control unit according to claim 6 of the present application selects and performs a communication method with the DMB display apparatus according to the detection result of the sensing unit, so that communication suitable for the detachment and mounting state of the DMB display apparatus is performed.

The detachable digital multimedia display device for a refrigerator according to claim 7 of the present invention has an input unit including a microphone unit for acquiring voice and generating voice data, a button unit for acquiring a user input, and a voice recognition module for recognizing voice. And a first interface for performing data communication with a connection interface of the main controller, a DMB module for receiving and converting a digital multimedia broadcasting (DMB) signal into a digital signal, a storage unit for storing food storage information and refrigerator state information. And a display unit for displaying the food storage screen included in the food storage information, a character corresponding to the recognized voice, a DMB screen corresponding to the DMB signal, and a refrigerator state, and receiving the refrigerator state from the main control unit and displaying the refrigerator unit on the display unit. Food preservation information by driving microphone and voice food module when input from user It is composed of a control unit for displaying the included food storage screen and the character corresponding to the recognized voice on the display unit, or by driving the DMB module to receive the DMB signal and display the corresponding DMB screen on the display unit. It is provided.

It is preferable that the control unit of claim 8 selectively displays a refrigerator state, a food storage screen, a recognized voice, and a DMB screen.

The display device according to claim 9 of the present invention has a power supply unit for receiving and supplying driving power from the main control unit when mounted in the refrigerator, so that stable power supply is achieved.

The power supply unit of claim 10 is provided with a charging means to ensure stable power supply even if detached from the refrigerator.

The detachable digital multimedia display apparatus for a refrigerator according to claim 11, which is applied at the time of filing, manages the connection means for receiving the refrigerator state from the main control unit, acquires and recognizes a voice from the user, and performs food management according to the recognized voice. Means, communication means for receiving a digital multimedia broadcasting (DMB) signal to generate a DMB screen, and display means for selectively displaying one of a refrigerator state, a character corresponding to a recognized voice, and a DMB screen.

It is preferable that the display apparatus according to claim 12 having an input means for acquiring a user's selection input, and the display means preferentially displaying the refrigerator state, and performing a display corresponding to the user's selection input. .

When the display apparatus according to claim 13 of the present application is mounted in a refrigerator, it is preferable to include a power supply unit which is charged by receiving driving power from a main control unit.

The present invention of such a configuration has an effect of providing the user with various functions by performing food storage management function and DMB function.

In addition, the present invention is to enable the display device to be removable and mounted, there is an effect that the user can more conveniently provide the state of the refrigerator, the food storage management function and the DMB function at any time.

In addition, the present invention has the effect of detecting the detachment and mounting of the display device and correspondingly, it is possible to select a communication method.

Claims (13)

A refrigerator body having a plurality of storage spaces for storing an object; A refrigerator door that opens and closes the storage space and has a receiving groove of a digital multimedia broadcasting (DMB) display device on a front surface thereof; A main controller which drives and controls a cooling cycle for the storage space; Detachable and attachable to the accommodating groove of the refrigerator door, and is electrically connected to the main control unit when the refrigerator door is mounted, and receives the refrigerator state information and the driving power, and performs the wireless communication with the main control unit when detaching, and receives the refrigerator state information. And a DMB display device having a display unit for displaying a refrigerator state. The method of claim 1, The DMB display apparatus includes a DMB module for receiving a DMB, a DMB button for selecting a mode of the DMB, and converts the currently displayed information into the DMB mode to display on the display unit in conjunction with a user input of the DMB button. Featured refrigerator. The method according to claim 1 or 2, The DMB display apparatus includes a microphone unit for acquiring voice to generate voice data, a voice recognition module for reading voice data input through the microphone unit, and a control unit for performing food management according to the read voice data. Refrigerator. The method of claim 3, The control unit displays information on the read voice data on the display unit. The method of claim 1, The main control unit is a refrigerator, characterized in that provided with a detection unit for detecting the detachment and mounting of the DMB display device. The method of claim 5, And the main controller selects and performs a communication method with the DMB display device according to the detection result of the detector. An input unit including a microphone unit for acquiring voice and generating voice data, and a button unit for acquiring a user input; A speech recognition module for recognizing speech; A first interface for performing data communication with a connection interface of the main controller; A DMB module for receiving a digital multimedia broadcasting (DMB) signal and converting it into a digital signal; A storage unit for storing food storage information and refrigerator state information; A display unit for displaying a food storage screen included in food storage information, a text corresponding to a recognized voice, a DMB screen corresponding to a DMB signal, and a refrigerator state; Receives the state of the refrigerator from the main control unit and displays it on the display unit, when the input from the user to drive the microphone unit and the voice food module to display the food storage screen included in the food storage information and the text corresponding to the recognized voice display unit Or a control unit configured to display on the display unit or to drive a DMB module to receive a DMB signal and to display a corresponding DMB screen on a display unit. The method of claim 7, wherein The control unit is a removable digital multimedia display device for a refrigerator, characterized in that the display selectively displays the refrigerator status, food storage screen and the recognized voice, and DMB screen. The method of claim 7, wherein Removable digital multimedia display device for a refrigerator, characterized in that the display device includes a power supply for receiving and supplying driving power from the main control unit when the display device is mounted on the refrigerator. The method of claim 9, Detachable digital multimedia display device for a refrigerator, characterized in that the power supply unit is provided with a charging means. Connecting means for receiving a refrigerator state from a main control unit; Management means for acquiring and recognizing a voice from a user, and performing food management according to the recognized voice; Communication means for receiving a digital multimedia broadcasting (DMB) signal to generate a DMB screen; And a display means for selectively displaying one of a refrigerator state, a text corresponding to a recognized voice, and a DMB screen. The method of claim 11, The display apparatus includes an input means for acquiring a user's selection input, and the display means preferentially displays the refrigerator state, and performs display corresponding to the user's selection input. The method of claim 11, When the display device is mounted in the refrigerator, the removable digital multimedia display device for a refrigerator, characterized in that it comprises a power supply unit that is charged by receiving driving power from the main control unit.

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