Patent Publication Number: US-2023139117-A1

Title: Cooking apparatus

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This application is a continuation of International Application PCT/KR2021/007809, filed Jun. 22, 2021, and claims foreign priority to Korean application 10-2020-0079458, filed Jun. 29, 2020, the disclosures of which are incorporated herein by reference in their entireties. 
    
    
     BACKGROUND 
     1. Field 
     The present disclosure relates to a cooking apparatus, and more particularly, to a cooking apparatus capable of dividing a cooking space in a cooking chamber. 
     2. Description of Related Art 
     A cooking apparatus is an appliance for heating and cooking an object to be cooked, such as a food, and refers to a device capable of providing various functions related to cooking, such as heating, thawing, drying, and sterilization of the object to be cooked. Examples of such a cooking apparatus include an oven such as a gas oven or an electric oven, a microwave heating device (hereinafter referred to as a microwave), a gas range, an electric range, a gas grill, or an electric grill. 
     In general, an oven is a device that cooks a food by transferring heat directly to the food through a heat source such as a heater or by heating an inside of a cooking chamber. A microwave oven is a device that cooks a food by using frictional heat between molecules that is generated by disrupting a molecular arrangement of the food with a high frequency as a heat source. 
     For cooking two or more different types of foods by using a cooking apparatus, an optimum temperature or method at which each food is cooked may be different. Accordingly, there is a need for a cooking apparatus configured to cook each food, in a suitable manner, in a plurality of cooking spaces. 
     The present disclosure is directed to providing a cooking apparatus including a plurality of cooking spaces into which a plurality of different foods is respectively inserted. 
     Further, the present disclosure is directed to providing a cooking apparatus capable of, when a plurality of different types of food is simultaneously cooked, cooking the different types of food with an optimal method for each food. 
     Further, the present disclosure is directed to providing a cooking apparatus capable of easily cooking a plurality of different types of food in a cooking chamber by effectively dividing a cooking space. 
     SUMMARY 
     One aspect of the present disclosure provides a cooking apparatus including a cooking chamber in which a food is cooked and opened in a first direction, a heater arranged at a side of the cooking chamber and configured to provide heat into the cooking chamber, a magnetron configured to generate a high frequency supplied into the cooking chamber, and a folding shelf detachably mounted in the cooking chamber and configured to be foldable. The folding shelf extends in a second direction to support the food at a first mounting position, and while the folding shelf is in a folded state, the folding shelf is configured to divide the cooking chamber into a plurality of cooking spaces at a second mounting position. 
     The plurality of cooking spaces may include a first space arranged on a first side along the second direction, and a second space arranged on a second side along the second direction. 
     The cooking apparatus may further include a shelf fixer protruding from a lower portion of the cooking chamber to an inside of the cooking chamber so as to fix the folding shelf. 
     The shelf fixer may comprise a plurality of shelf fixers. The plurality of shelf fixers may be spaced apart along the second direction, and the folding shelf may be arranged between the plurality of shelf fixers. 
     The heater may comprise a plurality of heaters. The plurality of heaters may be arranged in an upper portion of the cooking chamber to be spaced apart along the second direction, and at least one of the plurality of heaters may be configured to provide heat to the first space. 
     The cooking apparatus may further include a first side wall and a second side wall facing each other in the second direction of the cooking chamber, and at least one sensor provided in the cooking chamber and configured to detect a mounting position of the folding shelf. The at least one sensor may include a first sensor provided on at least one of the first side wall or the second side wall and configured to detect whether the folding shelf is mounted at the first mounting position. 
     The folding shelf may extend in a third direction, at the second mounting position, and the cooking apparatus may further include a second sensor provided on a rear wall of the cooking chamber and is configured to detect whether the folding shelf is mounted at the second mounting position. 
     The cooking apparatus may further include a first auxiliary shelf inserted into the first space to divide the first space into a plurality of first auxiliary spaces, and a second auxiliary shelf inserted into the second space to divide the second space into a plurality of second auxiliary spaces. 
     The cooking apparatus may further include a user interface configured to display an insertion position of the folding shelf based on information that is detected by the at least one sensor, and receive an input from a user, and a controller configured to control the user interface to display a recommended cooking space among the plurality of cooking spaces in response to obtaining the information detected by the at least one sensor. 
     The controller may be configured to control the heater and the magnetron to transfer heat and a high frequency to the recommended cooking space among the plurality of cooking spaces. 
     The cooking chamber may include a first side wall and a second side wall provided to face each other, and including a support member, respectively. The folding shelf may include a first shelf member forming the first space between the first side wall and the first shelf member, and a second shelf member forming the second space between the second side wall and the second shelf member. Each of the first shelf member and the second shelf member may include a support protrusion formed on a lower surface thereof to support a plurality of auxiliary shelves. 
     While the folding shelf is in a folded state, the plurality of auxiliary shelves may include a first auxiliary shelf inserted between the first side wall and the first shelf member and supported by the support member of the first side wall and the support protrusion of the first shelf member, and a second auxiliary shelf inserted between the second side wall and the second shelf member and supported by the support member of the second side wall and the support protrusion of the second shelf member. 
     The folding shelf may further include a hinge device arranged between the first shelf member and the second shelf member. The hinge device may include a connecting member extending in the second direction between the first shelf member and the second shelf member, a first hinge configured to rotate the first shelf member and the connecting member, and a second hinge configured to rotate the second shelf member and the connecting member. 
     The folding shelf may include a stopper provided on at least one of an upper portion or a lower portion of the first shelf member and the second shelf member to allow the folding shelf to be supported in a vertical direction. 
     The stopper may include a plurality of lower stoppers provided in a lower portion of each of the first shelf member and the second shelf member. The cooking apparatus may further include a plurality of shelf fixers protruding from the lower portion of the cooking chamber toward an inside of the cooking chamber so as to be in contact with the plurality of lower stoppers at the second mounting position, so as to fix the folding shelf. 
     Another aspect of the present disclosure provides a cooking apparatus including a cooking chamber opened in a first direction, a plurality of heaters arranged in a second direction so as to provide heat into the cooking chamber, the plurality of heaters configured to be controlled independently of each other, a magnetron provided to generate a high frequency supplied into the cooking chamber, and a folding shelf detachably mounted in the cooking chamber so as to support a food, and provided to be foldable. The folding shelf can be configured to divide the cooking chamber into a plurality of cooking spaces arranged in the second direction when mounted to the cooking chamber in a folded state. 
     The folding shelf can be mounted in a vertical direction while in the folded state and is configured to divide the plurality of cooking spaces in a left and right direction. 
     The cooking apparatus may further include a plurality of auxiliary shelves inserted into each of the plurality of cooking spaces to divide the each of the plurality of cooking spaces into a plurality of auxiliary spaces arranged in a third direction. 
     Another aspect of the present disclosure provides a cooking apparatus including a cooking chamber including a first side wall and a second side wall facing each other, a heater configured to provide heat into the cooking chamber, a magnetron configured to generate a high frequency supplied into the cooking chamber, and a folding shelf detachably mounted in the cooking chamber and configured to be foldable. The folding shelf extends between the first side wall and the second side wall so as to support a food, at a first mounting position, and when the folding shelf is in a folded state, the folding shelf can be configured to divide the cooking chamber into a plurality of cooking spaces at a second mounting position. 
     The folding shelf may extend in a vertical direction at the second mounting position, so as to arrange the plurality of cooking spaces in a left and right direction. 
     A cooking apparatus may include a plurality of cooking spaces by using a folding shelf. 
     Further, a cooking apparatus may cook a food placed in a plurality of cooking spaces in different optimal ways. 
     Before undertaking the DETAILED DESCRIPTION below, it may be advantageous to set forth definitions of certain words and phrases used throughout this patent document: the terms “include” and “comprise,” as well as derivatives thereof, mean inclusion without limitation; the term “or,” is inclusive, meaning and/or; the phrases “associated with” and “associated therewith,” as well as derivatives thereof, may mean to include, be included within, interconnect with, contain, be contained within, connect to or with, couple to or with, be communicable with, cooperate with, interleave, juxtapose, be proximate to, be bound to or with, have, have a property of, or the like; and the term “controller” means any device, system or part thereof that controls at least one operation, such a device may be implemented in hardware, firmware or software, or some combination of at least two of the same. It should be noted that the functionality associated with any particular controller may be centralized or distributed, whether locally or remotely. 
     Moreover, various functions described below can be implemented or supported by one or more computer programs, each of which is formed from computer readable program code and embodied in a computer readable medium. The terms “application” and “program” refer to one or more computer programs, software components, sets of instructions, procedures, functions, objects, classes, instances, related data, or a portion thereof adapted for implementation in a suitable computer readable program code. The phrase “computer readable program code” includes any type of computer code, including source code, object code, and executable code. The phrase “computer readable medium” includes any type of medium capable of being accessed by a computer, such as read only memory (ROM), random access memory (RAM), a hard disk drive, a compact disc (CD), a digital video disc (DVD), or any other type of memory. A “non-transitory” computer readable medium excludes wired, wireless, optical, or other communication links that transport transitory electrical or other signals. A non-transitory computer readable medium includes media where data can be permanently stored and media where data can be stored and later overwritten, such as a rewritable optical disc or an erasable memory device. 
     Definitions for certain words and phrases are provided throughout this patent document, those of ordinary skill in the art should understand that in many, if not most instances, such definitions apply to prior, as well as future uses of such defined words and phrases. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       For a more complete understanding of the present disclosure and its advantages, reference is now made to the following description taken in conjunction with the accompanying drawings, in which like reference numerals represent like parts: 
         FIG.  1    is a perspective view illustrating a cooking apparatus according to various embodiments of the present disclosure. 
         FIG.  2    is a view illustrating a partial configuration of an interior of the cooking apparatus shown in  FIG.  1   . 
         FIG.  3    is a view illustrating a state in which a folding shelf and a heat source are removed from the cooking apparatus shown in  FIG.  2   . 
         FIG.  4    is a front view illustrating the cooking apparatus shown in  FIG.  1   . 
         FIG.  5    is a view illustrating a state in which the folding shelf is folded in the cooking apparatus shown in  FIG.  4   . 
         FIG.  6    is a view illustrating a state in which an auxiliary shelf is additionally inserted into the cooking apparatus shown in  FIG.  5   . 
         FIG.  7    is a view illustrating a partial configuration of the cooking apparatus shown in  FIG.  1   . 
         FIG.  8    is a view illustrating the folding shelf in the cooking apparatus shown in  FIG.  1   . 
         FIG.  9    is a rear view illustrating the folding shelf shown in  FIG.  8   . 
         FIG.  10    is a front view illustrating a cooking apparatus according to various embodiments of the present disclosure. 
         FIG.  11    is a view illustrating a state in which an auxiliary shelf is additionally inserted into the cooking apparatus shown in  FIG.  10   . 
         FIG.  12    is a view illustrating a folding shelf in the cooking apparatus shown in  FIG.  10   . 
         FIG.  13    is a rear view illustrating the folding shelf in the cooking apparatus shown in  FIG.  10   . 
         FIG.  14    is a block diagram illustrating a control flow of the cooking apparatus according to various embodiments of the present disclosure. 
     
    
    
     DETAILED DESCRIPTION 
       FIGS.  1  through  14   , discussed below, and the various embodiments used to describe the principles of the present disclosure in this patent document are by way of illustration only and should not be construed in any way to limit the scope of the disclosure. Those skilled in the art will understand that the principles of the present disclosure may be implemented in any suitably arranged system or device. 
     Embodiments described in the disclosure and configurations shown in the drawings are merely examples of the embodiments of the disclosure, and may be modified in various different ways at the time of filing of the present application to replace the embodiments and drawings of the disclosure. 
     In addition, the same reference numerals or signs shown in the drawings of the disclosure indicate elements or components performing substantially the same function. 
     Also, the terms used herein are used to describe the embodiments and are not intended to limit and/or restrict the disclosure. The singular forms “a,” “an” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. In this disclosure, the terms “including”, “having”, and the like are used to specify features, numbers, steps, operations, elements, components, or combinations thereof, but do not preclude the presence or addition of one or more of the features, elements, steps, operations, elements, components, or combinations thereof. 
     It will be understood that, although the terms first, second, third, etc., may be used herein to describe various elements, but elements are not limited by these terms. These terms are only used to distinguish one element from another element. For example, without departing from the scope of the disclosure, a first element may be termed as a second element, and a second element may be termed as a first element. The term of “and/or” includes a plurality of combinations of relevant items or any one item among a plurality of relevant items. 
     In the following detailed description, the terms of “front,” “rear,” “left side,” “right side,” and the like may be defined by the drawings, but the shape and the location of the component is not limited by the term. 
     Particularly, as shown in  FIG.  1   , a direction, to which a door  20  is directed, is defined as a front side, and a rear side, left and right sides, and upper and lower sides are defined based on the definition of the front side. 
     Hereinafter exemplary embodiments of the present disclosure will be described particularly with reference to the accompanying drawings. 
       FIG.  1    is a perspective view illustrating a cooking apparatus according to various embodiments of the present disclosure.  FIG.  2    is a view illustrating a partial configuration of an interior of the cooking apparatus shown in  FIG.  1   .  FIG.  3    is a view illustrating a state in which a folding shelf  400  and a heat source  100  are removed from the cooking apparatus shown in  FIG.  2   . 
     Referring to  FIGS.  1  to  3   , a cooking apparatus  1  may include a housing  10  provided to form an exterior, and a cooking chamber  11  arranged inside the housing  10  and in which a food is placed. 
     The cooking apparatus  1  may include an inner housing  12  arranged inside the housing  10  and provided to form the cooking chamber  11 . A certain separation space  15  may be formed between the inner housing  12  and the housing  10 . 
     The housing  10  and the inner housing  12  may be provided to be opened in a first direction A, which is a front direction of the cooking apparatus  1 . 
     A user may place the food to the cooking chamber  11  through an opening of the inner housing  12  formed in the first direction A. 
     The cooking chamber  11  may be provided in a substantially rectangular parallelepiped shape having a long side in a second direction B perpendicular to a left and right direction with respect to the first direction A. 
     The cooking apparatus  1  may include a machine room  13  formed inside the housing  10  and arranged below the cooking chamber  11 . Various electronic components configured to drive the cooking apparatus  1  may be arranged inside the machine room  13 . 
     The cooking chamber  11  may be opened in the first direction A. The cooking chamber  11  may include a first side wall  11   c  and a second side wall  11   d  in the second direction B. Further, the cooking chamber  11  may include an upper surface  11   a  and a lower surface  11   b  in a third direction C. 
     The cooking apparatus  1  may include a door  20  configured to open and close an opening of the housing  10  and the inner housing  12 . 
     The door  20  may include a user interface  21  configured to receive an input from a user and provided to display operation information. However, the user interface  21  may be arranged in the housing  10  according to embodiments. 
     The user interface  21  may include an input  22  configured to receive an input from a user, and a display  23  provided to display operation information. According to embodiments, the user interface  21  may further include a speaker configured to output a sound about operation information. 
     The input  22  may include a first input  22   a  provided in the form of a jog dial to receive a selection of a cooking temperature, a selection of a cooking time, and a selection of a cooking space, and a second input  22   b  provided in the form of a button or an icon so as to receive an input related to a start of a cooking operation and a stop of a cooking operation and a selection of a control target. However, the input  22  is not limited thereto, and according to embodiments, the input may be provided in various types capable of receiving an input for controlling the cooking apparatus  1  from a user. 
     The display  23  may display information that is input by a user, such as information on a cooking temperature, a cooking time, and a cooking space selected by a user. In addition, the display  23  may display a notification about an arrangement of target food, information on a recommended food that may be cooked simultaneously with the target food, or information on a recommended menu that may be made from the target food. For this, the display  23  may be provided with a known type of display panel. 
     The display  23  may be provided as a touch screen according to embodiments, and in this case, the input  22  may be provided integrally with the display  23 . The door  20  may include a transparent member  24  formed of a transparent material to allow a user to observe an inside of the cooking chamber  11  when the door  20  is closed. 
     The cooking apparatus  1  may include a folding shelf  400  mounted inside the cooking chamber  11  and provided to allow a user to place a food therein. The folding shelf  400  may be detachably arranged inside the cooking chamber  11 . 
     The cooking chamber  11  may include a support member  14  formed on opposite sides of the cooking chamber  11  to allow the folding shelf  400  to be mounted between the upper surface  11   a  and the lower surface  11   b  of the cooking chamber  11 . 
     In the drawings, the support member  14  is mounted at a predetermined height, but is not limited thereto. Alternatively, the support member may be provided in plurality in the third direction C vertically perpendicular to the first direction A or the second direction B, so as to allow the folding shelf  400  to be mounted at various heights. 
     The support member  14  may include a first support member  14   a , a second support member  14   b , and a third support member  14   c . The first support member  14   a  may be provided adjacent to the front. The second support member  14   b  may be provided behind the first support member  14   a . That is, the second support member  14   b  may be provided adjacent to a rear wall of the cooking chamber  11 . The third support member  14   c  may be provided under the first support member  14   a . The folding shelf  400  may be inserted between the first support member  14   a  and the third support member  14   c . The first support member  14   a  and the third support member  14   c  may fix the folding shelf  400  to prevent the folding shelf  400  from separating. The first support member  14   a  and the second support member  14   b  may support the folding shelf  400  from an upper side of the folding shelf  400 . Accordingly, the first support member  14   a  may correspond to a first fixer, and the second support member  14   b  may correspond to a second fixer. 
     The first support member  14   a  may be formed to be longer than the second support member  14   b  with respect to the first direction A. However, the present disclosure is not limited thereto, and the first support member  14   a  may be shorter than the second support member  14   b  with respect to the second direction B. The third support member  14   c  may support the folding shelf  400  under the folding shelf  400 . Accordingly, the third support member  14   c  may be formed to correspond to a length of a short side of the folding shelf  400 . However, the present disclosure is not limited thereto and the third support member  14   c  may be extended by various lengths to support the folding shelf  400 . 
     In drawings, the first support member  14   a  and the second support member  14   b  are spaced apart from each other, but the first support member  14   a  and the second support member  14   b  may be connected to each other. That is, the first support member  14   a  and the second support member  14   b  may be integrally formed with each other. 
     In the drawings, three support members  14  are provided on each side wall but are not limited thereto. The support member  14  may be formed in various numbers to allow a plurality of folding shelves  400  or a plurality of auxiliary shelves  500  to be inserted thereto. Further, the support member  14  may be formed in a number corresponding to support protrusions  414  and  424  to allow the auxiliary shelf  500  to be inserted between the support member  14  and the support protrusions  414  and  424 . 
     The cooking apparatus may include at least one sensor  30  configured to detect whether the folding shelf  400  is inserted into the cooking chamber  11 . The at least one sensor  30  may detect whether the folding shelf  400  is inserted into the cooking chamber  11  and detect an insertion position, and the information may be displayed on the user display  23 . 
     The at least one sensor  30  may be a micro switch, an IR sensor, and an internal camera. However, the present disclosure is not limited thereto, and various sensors may be included as long as a sensor is configured to feedback an internal situation of the cooking chamber  11 . 
     The at least one sensor  30  may include a first sensor  31  and a second sensor  32 . 
     The first sensor  31  may be formed on left and right walls of the cooking chamber  11 . That is, the first sensor  31  may be provided in plurality. The first sensor  31  may be arranged on the left and right walls of the cooking chamber  11  to detect whether the folding shelf  400  is inserted into a first mounting position. That is, in response to inserting the folding shelf  400  into the first mounting position, the first sensors  31  arranged on both side walls may detect the folding shelf  400 . 
     In addition, even when the auxiliary shelf  500  as well as the folding shelf  400  is inserted, the first sensor  31  may detect information on whether the auxiliary shelf is inserted and a position thereof. The auxiliary shelf  500  may be inserted into a first space  111  adjacent to the first side wall  11   c  or into a second space  112  adjacent to the second side wall  11   d  and thus it is not required to operate all of the plurality of first sensors  31 . Accordingly, at least one of the plurality of first sensors  31  may detect information regarding whether the auxiliary shelf  500  is inserted and the position thereof. 
     The first sensor  31  may be arranged between the second support member  14   b  and the third support member  14   c . That is, the first sensor  31  may be arrange at a position adjacent to the rear wall of the cooking chamber  11  so as to detect whether the folding shelf  400  is correctly mounted at the first mounting position. However, the arrangement of the first sensor is not limited thereto and the first sensor may be arranged adjacent to the door along the first direction A. 
     The second sensor  32  may be provided on the rear wall of the cooking chamber  11 . Accordingly, the second sensor  32  may detect whether the folding shelf  400  is inserted into a second mounting position. That is, in response to inserting the folding shelf  400  into the second mounting position, the second sensor  32  provided on the rear wall may detect the folding shelf  400 . The second sensor  32  may be arranged to correspond to a line through which a center line of the cooking chamber  11  passes. 
     In drawings, a single second sensor  32  is arranged on the rear wall, but is not limited thereto. Alternatively, the second sensor  32  may be provided in plurality. Further, the second sensor  32  may be arranged in various positions such as a front portion, a rear portion, or a central portion of the upper wall, not the rear wall, so as to detect whether the folding shelf  400  is mounted at the second mounting position. In drawings, the second sensor  32  is arranged on an upper portion of the rear wall but is not limited thereto. The second sensor  32  may be arranged on a central portion and a lower portion of the rear wall as long as the second sensor  32  is configured to detect whether the folding shelf  400  is mounted at the second mounting position. 
     The at least one sensor  30  may detect the mounting positions of the folding shelf  400  and the auxiliary shelf  500  and display the information thereof on the user interface  21 . In addition, the cooking apparatus may include a controller  40  to be described later. The controller  40  may obtain information detected from the at least one sensor  30  to allow the user interface  21  to display a recommended cooking space among a plurality of cooking spaces. In addition, the controller  40  may provide a recommended menu and a recommended recipe corresponding to the food. However, the present disclosure is not limited thereto, and various information may be displayed on the user interface  21 . 
       FIG.  4    is a front view illustrating the cooking apparatus shown in  FIG.  1   .  FIG.  5    is a view illustrating a state in which the folding shelf is folded in the cooking apparatus shown in  FIG.  4   . 
     Referring to  FIGS.  4  and  5   , it may be assumed that a position, in which the folding shelf  400  is installed in the cooking chamber  11 , shown in  FIG.  4    is referred to as the first mounting position, and a position, in which the folding shelf  400  is installed in the cooking chamber  11 , shown in  FIG.  5    is referred to as the second mounting position. 
     The folding shelf  400  may include shelf members  410  and  420  on which a food is placed, and a holder  450  supporting the shelf members  410  and  420 . The shelf members  410  and  420  may be provided in plurality. That is, the shelf members  410  and  420  may include a first shelf member  410  and a second shelf member  420 . 
     In order to correspond to the cooking chamber  11 , the folding shelf  400  may be provided to include a long side  400 L extending in the second direction B and a short side  400 S extending in the first direction A. 
     The shelf members  410  and  420  may include the first shelf member  410  and the second shelf member  420 . The first shelf member  410  may be arranged on a side along the second direction B, and the second shelf member  420  may be arranged on a side opposite to the first shelf member  410  along the second direction B. 
     That is, with respect to a center line G of the folding shelf  400  in the second direction B, the first shelf member  410  may be arranged on a side thereof, and the second shelf member  420  may be arranged on the opposite side thereof. 
     With respect to a direction in which the long side  400 L of the folding shelf  400  extends, the first shelf member  410  may be arranged on a side in a direction of the long side  400 L of the folding shelf, and the second shelf member  420  may be arranged on another side thereof. 
     The first shelf member  410  may include a first cooking surface  411  on which a food is placed. The second shelf member  420  may include a second cooking surface  421  on which a food is placed. 
     The first cooking surface  411  and the second cooking surface  421  may be provided to face the upper surface  11   a  of the cooking chamber  11  in response to mounting the folding shelf  400 . 
     The cooking apparatus  1  may include the heat source  100  configured to provide heat to the inside of the cooking chamber  11  to allow a food to be cooked by the heat. 
     The heat source  100  may be provided to supply heat to a food placed on the folding shelf  400  to allow the food to be cooked. The food may be placed on the lower surface  11   b  of the cooking chamber  11  without the folding shelf  400 . Even in this case, the heat source  100  may provide heat to the food placed on the lower surface  11   b.    
     The heat source  100  may include a first heat source  200  arranged on the upper surface  11   a  of the cooking chamber  11 , and a second heat source  300  arranged on the lower surface  11   b  of the cooking chamber  11 . 
     The first heat source  200  may include a plurality of heaters  210 ,  220 ,  230 , and  240  configured to generate radiant heat. The plurality of heaters  210 ,  220 ,  230 , and  240  may directly transfer the radiant heat generated therein to a food. 
     The second heat source  300  may include a magnetron  310  configured to generate a high frequency. The magnetron  310  may be provided in such a way that the high frequency generated by the magnetron  310  is irradiated to an inside of a food to repeatedly convert a molecular arrangement of moisture contained in the food so as to generate frictional heat between molecules, thereby cooking the inside of the food. 
     The magnetron  310  may be arranged in the machine room  13 . The magnetron  310  may oscillate a high frequency from the machine room  13  toward the lower surface  11   b  of the cooking chamber  11 , and the high frequency may be irradiated to the folding shelf  400  by passing through the lower surface  11   b.    
     The cooking apparatus  1  according to various embodiments of the present disclosure may include the first heat source  200  and the second heat source  300  to efficiently cook a food. 
     The first heat source  200  may efficiently transfer the radiant heat to the upper side of the food through the plurality of heaters  210 ,  220 ,  230 , and  240  arranged on the upper surface  11   a  of the cooking chamber  11 . 
     Further, the cooking apparatus  1  may include a heating member  460  arranged on the folding shelf  400  to allow the heat to be transferred to the lower side of the food during a cooking process. 
     The heating member  460  may be arranged on an opposite side of the respective cooking surfaces  411  and  421  in the shelf members  410  and  420  of the folding shelf  400 . The heating member  460  may be arranged to face the lower surface  11   b  of the cooking chamber  11  in response to mounting the folding shelf  400  on the cooking chamber  11 . 
     The heating member  460  may be provided in plurality. Particularly, the number of the heating members  460  may be provided to correspond to the number of the plurality of shelf members  410  and  420 . 
     The heating member  460  may include a first heating member  461  coupled to the first shelf member  410  and a second heating member  462  coupled to the second shelf member  420 . 
     The first heating member  461  may be arranged at a position corresponding to the first cooking surface  411  with respect to the third direction C. That is, the first heating member  461  may be arranged on a surface opposite to the first cooking surface  411  of the first shelf member  410 . 
     The second heating member  462  may be arranged at a position corresponding to the second cooking surface  421  with respect to the third direction C. That is, the second heating member  462  may be arranged on the opposite surface of the second cooking surface  421  of the second shelf member  420 . 
     The heating member  460  may generate heat by absorbing the high frequency generated by the magnetron  310 . The high frequency radiated from the magnetron  310  facing the heating member  460  may be absorbed by the heating member  460 , and the heating member  460  may generate heat by using the absorbed high frequency. 
     The heat generated by the heating member  460  may be transferred to the cooking surfaces  411  and  421  through the shelf members  410  and  420  of the folding shelf  400 . 
     That is, as the heat generated by the heating member  460  is conducted to the cooking surfaces  411  and  421 , the heat may be supplied to the lower side of the food placed on the cooking surfaces  411  and  421 . 
     The heating member  460  may be formed of a ferrite material to absorb a high frequency. However, the disclosure is not limited thereto, and a material capable of generating heat by a high frequency may be mixed with ceramic, thereby forming the heating member  460 . 
     Accordingly, because the heat is supplied to the upper side and the lower side of the food, a user can cook a food efficiently without turning over the food. 
     A case, in which a plurality of foods having different cooking temperatures is simultaneously put into the cooking chamber  11  and cooked in the cooking apparatus, may often occur. In this case, the cooking apparatus may individually set a temperature of heat, which is generated by the plurality of heaters, to be different. 
     That is, heat generated by one heater and heat generated by another heater among the plurality of heaters may be set to be different from each other, and thus different temperatures may be transferred to the plurality of foods. 
     When the plurality of heaters is arranged on the upper surface  11   a  of the cooking chamber  11  and supplies heat at different temperatures as in various embodiments of the present disclosure, a temperature corresponding to the heat supplied from each heater may be supplied at a position corresponding to each heater in the third direction C in the cooking chamber  11 . Particularly, regions, in which different temperatures are provided, may be defined on each cooking surface  411  and  421  of the folding shelf  400 . 
     The folding shelf  400  may include the first shelf member  410  and the second shelf member  420 , and the first shelf member  410  and the second shelf member  420  may include cooking surfaces  411  and  421 , respectively, as described above. Different temperatures may be provided to the cooking surfaces  411  and  421 . 
     That is, the first shelf member  410  and the second shelf member  420  may be arranged side by side in the direction in which the long side  400 L of the folding shelf  400  extends, and different temperatures may be provided to each of shelf members from the plurality of heaters  210 ,  220 ,  230 , and  240 . 
     Some of plurality of heaters  210 ,  220 ,  230 , and  240  may be arranged at a position corresponding to the first cooking surface  411  of the first shelf member  410  with respect to the third direction C. The others of plurality of heaters  210 ,  220 ,  230 , and  240  may be arranged at a position corresponding to the second cooking surface  421  of the second shelf member  420  with respect to the third direction C. Accordingly, the first cooking surface  411  and the second cooking surface  421  may be provided to directly receive different heat generated by the respective heaters. 
     Accordingly, even when a plurality of foods having different cooking temperatures is simultaneously put into the cooking chamber  11 , the plurality of heaters  210 ,  220 ,  230 , and  240  may provide heat at different temperatures to the food arranged on the first shelf member  410  and the second shelf member  420 , respectively, based on arranging the plurality of foods on the first shelf member  410  and the second shelf member  420 , respectively. That is, when each food is placed in different spaces, each food may be cooked at a different temperature. 
     The cooking chamber  11  may be formed in a rectangular parallelepiped shape including a long side  11 L extending in the second direction B, and the corresponding folding shelf  400  may also be formed in rectangular shape including the long side  400 L extending in the second direction B and the short side  400 S extending in the first direction A. 
     When it is assumed that a region in which a food is placed and cooked on the folding shelf  400  is referred to as a cooking space, the first cooking surface  411  and the second cooking surface  421  may form the cooking space. The first cooking surface  411  and the second cooking surface  421  may be provided as separate components, and as a temperature of heat supplied to each cooking surface  411  and  421  is different, each cooking surface  411  and  421  may form cooking spaces having different temperatures. Further, the cooking space may be divided by the first cooking surface  411  and the second cooking surface  421 . 
     According to one embodiment of the present disclosure, the first cooking surface  411  and the second cooking surface  421  may be arranged in the direction of the long side  400 L of the folding shelf  400 , and thus the cooking space of the folding shelf  400  may be divided with respect to the direction of the long side  400 L of the folding shelf  400 . 
     As for the cooking apparatus  1 , the first cooking surface  411  and the second cooking surface  421  are arranged along the long side  400 L of the folding shelf  400  to divide the cooking space along the long side  400 L of the folding shelf  400 . 
     In addition, each of the plurality of heaters  210 ,  220 ,  230 , and  240  of the cooking apparatus  1  may be provided to include a long axis  200 L extending in the first direction A, and each of the plurality of heaters  210 ,  220 ,  230 , and  240  of the cooking apparatus  1  may be arranged to be spaced apart in the second direction B corresponding to the direction in which the long side  400 L of the folding shelf  400  extends. 
     The plurality of heaters  210 ,  220 ,  230 , and  240  may be configured to provide heat at different temperatures to the first cooking surface  411  and the second cooking surface  421  divided in the direction of the long side  400 L of the folding shelf  400 . 
     In addition, the heating member  460  may be configured to provide heat at different temperatures to the first cooking surface  411  and the second cooking surface  421  divided in the long side  400 L direction of the folding shelf  400 . 
     As described above, the first heating member  461  may be coupled to the first shelf member  410  and the second heating member  462  may be coupled to the second shelf member  420 . The first shelf member  410  and the second shelf member  420  may be arranged side by side in the direction of the long side  400 L of the folding shelf  400 . Accordingly, the first heating member  461  and the second heating member  462  may also be arranged side by side in the direction of the long side  400 L of the folding shelf  400 . 
     The first heater  210  may be arranged on one side in the second direction B, and the second heater  220  may be arranged on the opposite side of the first heater  210  in the second direction B. 
     Particularly, the first heater  210  may be arranged on a side and the second heater  220  may be arranged on the opposite side with respect to the center line G of the folding shelf  400  based on the second direction B. The third heater  230  may be arranged on a side adjacent to the first heater  210 , and the fourth heater  240  may be arranged on the opposite side adjacent to the second heater  220 . 
     The first heater  210  and the third heater  230  may generate heat at the same temperature. Further, the second heater  220  and the fourth heater  240  may generate heat at the same temperature. 
     The first and third heaters  210  and  230  and the second and fourth heaters  220  and  240  may generate heat at different temperatures. That is, a temperature generated at a side of the center line G and a temperature generated at the opposite side of the center line G may be different from each other. 
     When it is assumed that heat generated by the first and third heaters  210  and  230  is set to be higher than heat generated by the second and fourth heaters  220  and  240 , the cooking apparatus  1  may control the plurality of heaters  210 ,  220 ,  230 , and  240  to allow the temperature of the heat generated by the first and third heaters  210  and  230  to be greater than the temperature of the heat generated by the second and fourth heaters  220  and  240 . 
     Alternatively, the temperature of the heat generated by the plurality of heaters  210 ,  220 ,  230 , and  240  may be set to be the same, and while the cooking apparatus  1  is driven, the cooking apparatus  1  may control the plurality of heaters  210 ,  220 ,  230 , and  240  to allow the first and third heaters  210  and  230  to be continuously driven and to allow the second and fourth heaters  220  and  240  to be intermittently driven. Accordingly, the total temperature of the heat generated by the first and third heaters  210  and  230  may be greater than the total temperature of the heat generated by the second and fourth heaters  220  and  240 . 
     As described above, with respect to the center line G, the first shelf member  410  may be arranged on a side thereof and the second shelf member  420  may be arranged on the opposite side thereof. 
     The first cooking surface  411  of the first shelf member  410  may be arranged at a position corresponding to the first and third heaters  210  and  230  with respect to the third direction C. The second cooking surface  421  of the second shelf member  420  may be arranged at a position corresponding to the second and fourth heaters  220  and  240  with respect to the third direction C. 
     As described above, because the heat generated by the first and third heaters  210  and  230  is different from the heat generated by the second and fourth heaters  240 , the temperature of the heat transferred to the first cooking surface  411  may be different from the temperature of the heat transferred to the second cooking surface  421 . 
     Heat generated by the first and third heaters  210  and  230  may be transferred from the upper surface  11   a  to the first cooking surface  411 , and heat generated by the second and fourth heaters  240  may be transferred from the upper surface  11   a  to the second cooking surface  421 . 
     The heat generated by the first and third heaters  210  and  230  may be different from the heat generated by the second and fourth heaters  220  and  240  and thus the temperature of the heat transferred to the first cooking surface  411  may be different from the temperature of the heat transferred to the second cooking surface  421 . Accordingly, it is possible to place different foods having different cooking temperatures to each of the first cooking surface  411  of the first shelf member  410  and the second cooking surface  421  of the second shelf member  420 , and it is possible to simultaneously cook the different foods in the cooking chamber  11 . 
     Further, different foods may be positioned in the left and right direction based on the first direction A, which is the front of the cooking apparatus  1 , and thus while the cooking apparatus  1  performs a cooking process, a user can easily observe the cooking process of different foods through the transparent member  24 , in real time. 
     Heat conducted from the first and second heating members  461  and  462  may be transferred to the first and second shelf members  410  and  420 , respectively. The heating member  460  may be heated by the high frequency oscillated from the magnetron  310  arranged on the lower surface  11   b  as described above, and the heat generated thereby may be conducted to the first and second cooking surfaces  411  and  421  through the first and second shelf members  410  and  420 . 
     Heat at different temperatures may be supplied to the upper side of the first and second cooking surfaces  411  and  421  from the plurality of heaters  210 ,  220 ,  230 , and  240 , but the same heat may be supplied to the lower side of the first and second cooking surfaces  411  and  421  from the heating member  460 . 
     However, the present disclosure is not limited thereto, and the heating member  460  may include the first heating member  461  and the second heating member  462  that radiate heat at different temperatures to the first and second cooking surfaces  411  and  421 , respectively. That is, the first heating member  461  and the second heating member  462  may be provided to generate heat at different temperatures in response to absorbing the same amount of high frequency. 
     The first heating member  461  may be arranged at a position corresponding to the first cooking surface  411  with respect to the third direction C. The second heating member  462  may be arranged at a position corresponding to the second cooking surface  421  with respect to the third direction C. 
     The first heating member  461  may generate heat and provide heat at a predetermined temperature to the first cooking surface  411 . The second heating member  462  may generate heat and provide heat at a temperature, which is different from the temperature generated by the first heating member  461 , to the second cooking surface  421 . 
     The cooking apparatus may include a plurality of shelf fixers  16  provided on a lower surface of the cooking chamber  11 . The shelf fixer  16  may protrude inward from the lower surface of the cooking chamber  11 . The shelf fixer  16  may allow the folding shelf  400  to be mounted at the second mounting position. That is, the folding shelf  400  at the second mounting position may be arranged between the plurality of shelf fixers  16  in the second direction B. The shelf fixer  16  may be in contact with lower stoppers  413  and  423  of the folding shelf  400 , thereby fixing the folding shelf  400 . 
     As an example, the shelf fixer  16  may be provided in the form of a protrusion. However, the present disclosure is not limited thereto and may include various shapes as long as the shelf fixer is provided to fix the folding shelf  400 . 
     The shelf fixer  16  may extend long in the first direction A. However, the present disclosure is not limited thereto and a plurality of shelf fixers may be spaced apart from each other along the first direction A. 
     The folding shelf  400  may include stoppers  413 ,  415 ,  423 , and  425 . The stopper may include the lower stoppers  413  and  423 . The lower stoppers  413  and  423  may be respectively provided in a lower portion of the first shelf member  410  and the second shelf member  420  to allow the folding shelf  400  to be supported with respect to the third direction C. That is, the lower stoppers  413  and  423  may be provided in plurality. The lower stopper  413  of the first shelf member  410  may be arranged adjacent to the second shelf member  420 . The lower stopper  423  of the second shelf member  420  may be arranged adjacent to the first shelf member  410 . That is, because the lower stopper  413  of the first shelf member  410  and the lower stopper  423  of the second shelf member  420  are arranged adjacent to each other, it is possible to prevent the folding shelf  400  from folding in a reverse direction. 
     As described above, when the folding shelf  400  is mounted to the cooking chamber  11  at the second mounting position, the lower stoppers  413  and  423  may be in contact with the shelf fixer  16 . Accordingly, the folding shelf  400  may be fixed without falling out from the second mounting position or shaking. 
     The folding shelf  400  may include the support protrusions  414  and  424 . The support protrusions  414  and  424  may be provided at a lower central portion of each shelf member. Together with the support member  14  provided on the side wall of the cooking chamber  11 , the support protrusions  414  and  424  may support the folding shelf  400  and the auxiliary shelf  500 . That is, the support protrusions  414  and  424  may be provided in plurality. The support protrusions  414  and  424  may include a first support protrusion  414  and a second support protrusion  424 . 
     The first support protrusion  414  may be provided on a lower central portion of the first shelf member  410 , and the second support protrusion  424  may be provided on a lower central portion of the second shelf member  420 . However, the positions of the support protrusions  414  and  424  are not limited to the central portion of each shelf member. Alternatively, the positions of the support protrusions  414  and  424  may vary as long as the support protrusions  414  and  424  are provided to support the auxiliary shelf  500  to be described later. In addition, rather than providing one support protrusion to each shelf member, the support protrusions  414  and  424  may be formed in plurality so as to allow a plurality of auxiliary shelves  500  to be inserted thereto so as to form a plurality of auxiliary spaces. Accordingly, the support member  14  provided on the side wall of the cooking chamber  11  may also be formed in a number corresponding to the support protrusions  414  and  424  to allow the auxiliary shelf  500  to be inserted between the support protrusions  414  and  424  and the support member  14 . 
     As shown in  FIG.  4   , the folding shelf  400  may be mounted at the first mounting position along the second direction B in the cooking chamber  11 . That is, the folding shelf  400  may be arranged between the first support member  14   a  and the third support member  14   c . Further, the folding shelf  400  may be arranged between the second support member  14   b  and the third support member  14   c . Each support member  14  may support an end, adjacent to the first side wall  11   c , of the first shelf member  410  to prevent the folding shelf  400  from folding along the third direction C. In addition, each support member  14  may support an end, adjacent to the second side wall  11   d , of the second shelf member  420  to prevent the folding shelf  400  from folding along the third direction C. Accordingly, even when a food is placed on the cooking surfaces of the first shelf member  410  and the second shelf member  420 , it is possible to prevent the folding shelf  400  from folding in the third direction C. 
     As shown in  FIG.  5   , the folding shelf  400  may be mounted at the second mounting position so as to extend along the third direction C in the cooking chamber  11 . The folding shelf  400  may be arranged between the plurality of shelf fixers  16 . That is, the lower stoppers  413  and  423  of the folding shelf  400  may be in contact with each of the plurality of shelf fixers  16  to fix the folding shelf  400 . 
     The folding shelf  400  mounted at the second mounting position may divide the cooking chamber  11  into a plurality of cooking spaces. That is, the cooking chamber  11  may be divided into the first space  111  and the second space  112 . As described above, because the plurality of heaters is individually controlled, a user can insert a food to a desired cooking space and cook the food by controlling each heater. The folding shelf  400  may serve as a shelf and a divider. 
     For example, in a state in which the first and third heaters  210  and  230  are driven and the second and fourth heaters  220  and  240  are not driven, the magnetron  310  may be operated. In this case, a food that requires both heat and a high frequency, such as a frozen bread, may be arranged in the first space  111 , and a food that is cooked only with a high frequency, such as hot chocolate or soup, may be arranged in the second space  112 . 
     As another example, in a state in which all of the plurality of heaters  210 ,  220 ,  230 , and  240  are driven but driving temperatures thereof are set to be different, the magnetron  310  may not be driven. In this case, a food such as a frozen dumpling may be arranged in the first space  111 , and a food that requires grilling such as a Neobiani (marinated grilled beef slice) or a steak may be arranged in the second space  112 . 
     However, the above example is merely an example of cooking, and the type of food and the driving method of the heaters  210 ,  220 ,  230 , and  240  and the magnetron are not limited to the above example. Accordingly, the cooking apparatus according to various embodiments of the present disclosure may secure a plurality of cooking spaces, and thus a user can simultaneously cook various foods requiring different cooking methods. 
     In the drawing, the folding shelf  400  is arranged at the center of the cooking chamber  11 , but is not limited thereto. The folding shelf  400  may be arranged adjacent to the first side wall  11   c . That is, the folding shelf  400  may be inserted between the shelf fixers  16  adjacent to the first side wall  11   c . In this case, the first space may be formed to be narrower than the second space  112 . Accordingly, a user can adjust the size of the cooking space according to the size of the food to be cooked. The above example is only an example, and thus it is also possible to use the cooking apparatus by forming the first space  111  to be wider than the second space  112 . 
       FIG.  6    is a view illustrating a state in which an auxiliary shelf is additionally inserted into the cooking apparatus shown in  FIG.  5   .  FIG.  7    is a view illustrating a partial configuration of the cooking apparatus shown in  FIG.  1   . 
     Referring to  FIGS.  6  and  7   , the cooking apparatus may further include the plurality of auxiliary shelves  500  inserted into the cooking chamber  11 . The plurality of auxiliary shelves  500  may include a first auxiliary shelf  510  and a second auxiliary shelf  520 . The first auxiliary shelf  510  may be inserted into the first space  111  to form a plurality of auxiliary spaces. The second auxiliary shelf  520  may be inserted into the second space  112  to form a plurality of auxiliary spaces. 
     The auxiliary shelf  500  may include a holder  550 . The holder  550  may shape a rim of the auxiliary shelf  500 . The holder  550  may be provided to support the auxiliary shelf  500 . The holder  550  may be provided in plurality. That is, the holder  550  may include a holder  551  of the first auxiliary shelf  510  and a holder  552  of the second auxiliary shelf  520 . 
     The first auxiliary shelf  510  may include a first cooking surface  511  on which a food is placed. The second auxiliary shelf  520  may include a second cooking surface  521  on which a food is placed. 
     The first cooking surface  511  and the second cooking surface  521  may face the upper surface  11   a  of the cooking chamber  11  in response to mounting the auxiliary shelves  510  and  520 . The heat source  100  may be configured to provide heat to a food placed on the auxiliary shelf  500  so as to cook the food. 
     Each auxiliary shelf  500  may include rims  512  and  522 , respectively. The auxiliary shelf  500  may include a rim  512  of the first auxiliary shelf  510  and a rim  522  of the second auxiliary shelf  520 . In addition, each of the auxiliary shelves  510  and  520  may include a coating member  513 . The coating member  513  may be provided on the outside of the holder to prevent damage to the auxiliary shelf  500  by an external environment and by a collision upon mounting of the auxiliary shelf  500 . Each of the auxiliary shelves  510  and  520  may include a heating member  560  attached to a lower portion thereof, respectively. That is, the heating member  560  may include a heating member  561  of the first auxiliary shelf  510  and a heating member  562  of the second auxiliary shelf  520 . 
     The first auxiliary shelf  510  may be arranged between the first side wall  11   c  and the first shelf member  410 . The first auxiliary shelf  510  may be inserted between the support members  14  provided on the first side wall  11   c  and supported by the support protrusion  414  of the first shelf member  410 . 
     The second auxiliary shelf  520  may be arranged between the second side wall  11   d  and the second shelf member  420 . The second auxiliary shelf  520  may be inserted between the support members  14  provided on the second side wall  11   d  and supported by the support protrusion  424  of the second shelf member  420 . 
     The first auxiliary shelf  510  may be inserted into the first space  111  to form a plurality of auxiliary spaces. That is, the first auxiliary shelf  510  may divide the first space  111  into a first auxiliary space  11   a  and a second auxiliary space  111   b . In addition, the second auxiliary shelf  520  may be inserted into the second space  112  to form a plurality of auxiliary spaces  112   a ,  112   b . That is, the second auxiliary shelf  520  may divide the second space  112  into a third auxiliary space  112   a  and a fourth auxiliary space  112   b.    
     Accordingly, the plurality of auxiliary spaces  111   a ,  111   b ,  112   a , and  112   b  may include the first auxiliary space  111   a , the second auxiliary space  111   b , the third auxiliary space  112   a , and the fourth auxiliary space  112   b . However, the auxiliary space is not limited to four auxiliary spaces, and more auxiliary spaces  111   a ,  111   b ,  112   a , and  112   b  may be formed according to the auxiliary shelves  510  and  520  to be inserted. Because the plurality of auxiliary spaces  111   a ,  111   b ,  112   a , and  112   b  is formed, a user can cook a variety of foods with a single operation. 
       FIG.  8    is a view illustrating the folding shelf in the cooking apparatus shown in  FIG.  1   .  FIG.  9    is a rear view illustrating the folding shelf shown in  FIG.  8   . 
     Referring to  FIGS.  8  and  9   , the folding shelf  400  may include the first shelf member  410  and the second shelf member  420 . The shelf member may include the cooking surfaces  411  and  421 , rims  412  and  422 , the stoppers  413 ,  415 ,  423 , and  425 , the support protrusions  414  and  424 , and the holder  450 . The folding shelf  400  may include a hinge device  470  configured to allow the first shelf member  410  and the second shelf member  420  to be folded. 
     The stopper may include upper stoppers  415  and  425 . The upper stoppers  415  and  425  may be respectively provided in the upper portion of the first shelf member  410  and the second shelf member  420  to allow the folding shelf  400  to be supported in the third direction C. That is, the upper stoppers  415  and  425  may be provided in plurality. The upper stopper  415  of the first shelf member  410  may be arranged adjacent to the second shelf member  420 . The upper stopper  425  of the second shelf member  420  may be arranged adjacent to the first shelf member  410 . That is, because the upper stopper  415  of the first shelf member  410  and the upper stopper  425  of the second shelf member  420  are arranged adjacent to each other, it is possible to prevent the folding shelf  400  from folding without supporting the food. 
     The cooking surface may include the first cooking surface  411  provided on the first shelf member  410  and the second cooking surface  421  provided on the second shelf member  420 . The first cooking surface  411  may be formed to be wider than the second cooking surface  421  so as to receive a food having a relatively larger area. The second cooking surface  421  may include a plurality of auxiliary cooking surfaces  421   a  and  421   b . The auxiliary cooking surfaces  421   a  and  421   b  may include a first auxiliary cooking surface  421   a  and a second auxiliary cooking surface  421   b . It is illustrated that the first auxiliary cooking surface  421   a  and the second auxiliary cooking surface  421   b  have the same size, but it is not limited thereto. Alternatively, the first auxiliary cooking surface  421   a  and the second auxiliary cooking surface  421   b  may have different sizes. Accordingly, a user can place a food on the cooking surface in consideration of the size of the food. 
     The folding shelf  400  may include the hinge device  470  arranged between the first shelf member  410  and the second shelf member  420 . The hinge device  470  may include a hinge  471  and a connecting member  474 . 
     The hinge  471  is configured to allow the first shelf member  410  and the second shelf member  420  to be rotatable. That is, the hinge  471  may allow the first shelf member  410  and the second shelf member  420  to be folded. The hinge  471  may be formed of a metal material or a plastic material that is not affected by electromagnetic waves. Accordingly, it is possible to minimize a risk caused by sparks generated inside due to the high frequency. 
     The connecting member  474  may be arranged between the first shelf member  410  and the second shelf member  420  to connect the first shelf member  410  and the second shelf member  420 . The connecting member  474  may be formed to have the same height as the first shelf member  410  and the second shelf member  420  without protruding between the first shelf member  410  and the second shelf member  420 . However, the present disclosure is not limited thereto and the connecting member  474  may protrude along the third direction C to define the first shelf member  410  and the second shelf member  420 . 
     It is illustrated that the first shelf member  410  and the second shelf member  420  are spaced apart from each other by the connecting member  474  in the drawing, but the present disclosure is not limited thereto. Alternatively, the first shelf member  410  and the second shelf member  420  may be integrally formed with each other. In this case, the connecting member  474  may be removed. 
     The holder  450  may shape an edge of the folding shelf  400 . The holder  450  may include a long side  450 L corresponding to the long side  400 L of the folding shelf  400  and a short side  450 S corresponding to the short side  400 S of the folding shelf  400 . The holder  450  may be provided to support the arrangement in which the first shelf members  410  and the second shelf members  420  are arranged side by side in the direction of the long side  450 L of the holder  450 . 
       FIG.  10    is a front view illustrating a cooking apparatus according to another embodiment of the present disclosure.  FIG.  11    is a view illustrating a state in which an auxiliary shelf is additionally inserted into the cooking apparatus shown in  FIG.  10   .  FIG.  12    is a view illustrating a folding shelf in the cooking apparatus shown in  FIG.  10   .  FIG.  13    is a rear view illustrating the folding shelf in the cooking apparatus shown in  FIG.  10   . 
     Referring to  FIGS.  10  to  13   , a folding shelf  400 ′ according to various embodiments may be formed to correspond to the length of the cooking chamber  11  in the third direction C. That is, based on the height of the cooking chamber  11  being low, the height of the fold shelf  400 ′ may be changed. 
     The folding shelf  400 ′ may include a hinge device  470 . The hinge device  470  may include a plurality of hinges and a connecting member  474 . 
     The plurality of hinges may include a left hinge  472 , an intermediate hinge  471 , and a right hinge  473 . The left hinge  472  may allow the first shelf member  410  and the hinge device  470  to be rotatably coupled to each other. The left hinge  472  may be referred to as a first hinge  472 . The right hinge  473  may allow the second shelf member  420  and the hinge device  470  to be rotatably coupled to each other. The right hinge  473  may be referred to as a second hinge  473 . 
     In drawings, it is illustrated that the first shelf member  410  is coupled to the left hinge  472  and the second shelf member  420  is coupled to the right hinge  473 , but is not limited thereto. The first shelf member  410  and the second shelf member  420  may be rotatably coupled to the intermediate hinge  471 . In addition, the number of hinges is not limited to three, and may include two or less or four or more. 
     In comparison with the above-mentioned embodiment, the hinge may be provided in plurality and accordingly, the connecting member  474  may be formed to be longer. In addition, a length of the connecting member  474  in the second direction B may be changed according to a length of the cooking chamber  11  in the second direction B and the third direction C. 
     For example, when only the length of the cooking chamber  11  in the second direction B becomes longer than that of an embodiment of the present disclosure, the length of the connecting member  474  may be increased and thus the length of the folding shelf  400  in the second direction B at the first mounting position may be increased. Because only the length of the connecting member  474  is increased, the length of the folding shelf  400  in the third direction C (for example, height) may not be increased and thus the folding shelf  400  may be mounted at the second mounting position. In this case, the position of the second sensor  32  may be arranged at other position in accordance with the second mounting position or may be provided in plurality. 
     Therefore, the folding shelf  400 ′ may be mounted in the cooking chamber  11  in various sizes, so as to divide the cooking space into a plurality of spaces. Accordingly, a user can be provided with various cooking environments to cook a plurality of foods. The plurality of cooking spaces may also vary according to the length of the connecting member  474 , and accordingly, the length of the plurality of auxiliary shelves  500  may be inserted into each of the plurality of cooking spaces. 
     The folding shelf  400 ′ may include upper stoppers  415  and  425 . The upper stoppers  415  and  425  may be in contact with the connecting member  474  to prevent the folding shelf  400 ′ from folding without supporting the food. 
       FIG.  14    is a block diagram illustrating a control flow of the cooking apparatus according to various embodiments of the present disclosure. 
     Referring to  FIG.  14   , the cooking apparatus according to various embodiments includes the at least one sensor  30  configured to detect the mounting positions of the folding shelf  400  and the auxiliary shelf  500 , the user interface  21  configured to receive an input from a user and display operation information, the controller  40  configured to perform a control operation to guide a recommended cooking space and a recommended recipe corresponding to a target food in response to obtaining information on the target food, and the heat source  100  configured to transfer heat and a high frequency to the cooking chamber  11 . 
     However, each configuration of the cooking apparatus shown in  FIG.  7    may be removed according to embodiments, and a configuration not shown may be added thereto, as necessary. 
     The user interface  21  according to various embodiments may include the input  22  configured to receive an input from a user, the display  23  provided to display operation information, and the speaker configured to output a sound. 
     The input  22  according to various embodiments may receive a selection of a cooking temperature, a selection of a cooking time, a selection of a cooking space, a start of a cooking operation and a stop of a cooking operation and a selection of a control target, as illustrated in  FIG.  1   . 
     As illustrated in  FIG.  1   , the display  23  according to various embodiments may display information that is input by a user, such as information on a cooking temperature, a cooking time, and a cooking space selected by a user. In addition, the display  23  may display a notification about an arrangement of target food, information on a recommended food that may be cooked simultaneously with the target food, or information on a recommended menu that may be made from the target food. 
     The speaker according to various embodiments may output various sound notifications based on the control of the controller  40 . For this, the speaker may be provided as a known type of speaker device. 
     The controller  40  according to various embodiments may control the heat source  100  to cook the target food based on a user input that is input through the input  22 . In addition, in response to obtaining the information on the target food, the controller  40  may control the heat source  100  to transfer the heat and high frequency to a recommended cooking space among the plurality of cooking spaces. 
     While a target food is arranged in the recommended cooking space, the controller  40  may control at least one of the plurality of heat sources  100  to heat the recommended cooking space based on a recipe corresponding to the target food. 
     In this case, the recipe may include information on a cooking temperature and a cooking time corresponding to the target food. In other words, the recipe may include at least one of a cooking temperature, a cooking time, or an output of the heat source  100  as a cooking parameter for the operation of the heat source  100 . A recipe to be applied to each cooking space may be determined based on a user input. 
     In addition, while the target food is arranged in a cooking space other than the recommended cooking space, the controller  40  may control at least one of the plurality of heat sources  100  to heat the cooking space in which the target food is placed, based on a recipe corresponding to the target food. 
     Further, in response to obtaining information on a target food from a user, the controller  40  may determine a recommended food that may be cooked in a cooking space other than the recommended cooking space, and control the user interface  21  to display the recommended food. 
     Further, in response to obtaining information on a target food from a user, the controller  40  may determine a recommended menu that uses the target food as a material and control the user interface  21  to display the recommended menu. 
     The controller  40  may include at least one memory configured to store a program for performing the above-described operation and an operation to be described later, and at least one processor configured to execute the stored program. 
     The heat source  100  according to various embodiments may be provided in plurality, and configured to provide heat to the cooking chamber  11 . 
     While the present disclosure has been particularly described with reference to exemplary embodiments, it should be understood by those of skilled in the art that various changes in form and details may be made without departing from the spirit and scope of the present disclosure. 
     Although the present disclosure has been described with various embodiments, various changes and modifications may be suggested to one skilled in the art. It is intended that the present disclosure encompass such changes and modifications as fall within the scope of the appended claims.