Patent Publication Number: US-2023132856-A1

Title: Cooking appliance

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
     This application claims priority to and benefit of Korean Patent Application Nos. 10-2021-0146025, filed on Oct. 28, 2021, 10-2022-0013982, filed on Feb. 3, 2022, 10-2022-0013984, filed on Feb. 3, 2022, and 10-2022-0045019, filed on Apr. 12, 2022 which are hereby incorporated by reference in their entirety for all purposes as if fully set forth herein. 
     BACKGROUND 
     1. Field of the Invention 
     The present disclosure relates to a cooking appliance, and more specifically, to a cooking appliance installed above a heating cooking device. 
     2. Discussion of Background Art 
     The content described in this section provides background information on the present disclosure and does not constitute the related art. 
     A cooking appliance is a home appliance that cooks food using microwaves and/or heater heat, which are type(s) of electromagnetic waves. The cooking appliance may be generally composed of a cavity, which is a space in which food is placed and cooked, and a door that opens and closes to provide access to the cavity. 
     When the cooking appliance is installed indoors, it is necessary to consider the efficient use of the cooking appliance, the saving of installation space, etc. Accordingly, the cooking appliance may be disposed at a location adjacent to a heating cooking device, for example, a heating-type oven, a gas range, etc. For example, the cooking appliance may be disposed above the heating cooking device. 
     When the cooking appliance is disposed above the heating cooking device, a user can conveniently cook food by reducing their movement in an environment where the cooking appliance and the heating cooking device are adjacent to each other. In addition, heat, oil mist, etc. generated from the heating cooking device can be discharged to the outside using the cooking appliance as a hood. 
     In a state in which the cooking appliance is disposed above the heating cooking device, the heat, oil mist, etc. generated from the heating cooking device disposed below the cooking appliance may adversely affect an operation of the cooking appliance. 
     For example, a display unit may be mounted on a front surface of a door provided in the cooking appliance in order to provide various types of information to the user. The user may know a cooking state of the cooked food through the display unit. 
     In addition, when the display unit is connected to another home appliance and serves as a hub of the home appliance, information other than cooking of food may be obtained through the display unit. In addition, the user may input a command required for cooking and other various commands into the display unit through a touch display method. 
     In the state in which the cooking appliance is disposed above the heating cooking device, the heat, oil mist, etc. generated from the heating cooking device may penetrate into the display unit and/or other components mounted on the door. 
     It is necessary to protect the display unit and other parts mounted on the door of the cooking appliance from being damaged or malfunctioning due to such contaminants, heat, oil mist, etc. 
     In addition, it is necessary to allow the user to see the inside of the cavity in order to provide convenience to the user. In order to see the cavity, a camera may be provided on the door of the cooking appliance and play an image of the inside of the cavity on the display unit. 
     SUMMARY OF THE INVENTION 
     The present disclosure provides a cooking appliance having a display unit provided on a front surface in order to provide various types of information to the user. 
     The present disclosure provides a cooking appliance having a display unit provided on a door of the cooking appliance using microwaves. 
     The present disclosure provides a cooking appliance having a structure capable of showing a situation inside a cavity to the user during a cooking process by capturing the inside of the cavity. 
     The present disclosure provides a cooking appliance having a camera provided to be easily detachable to a door, and capturing a image(s) inside a cavity. 
     The present disclosure provides a cooking appliance having a structure capable of suppressing heat, oil mist, etc. generated from a heating cooking device disposed thereunder from penetrating into a door of the cooking appliance. 
     The present disclosure provides a cooking appliance having a structure capable of suppressing a display unit from being contaminated by oil mist. 
     The present disclosure provides a cooking appliance having a cooling structure of a display module attached to a front surface of a door. 
     The present disclosure provides a cooking appliance having a structure capable of suppressing heat, oil mist, etc. from penetrating into a door by forming an air curtain outside the door. 
     The present disclosure provides a cooking appliance having a door equipped with a display unit on a front surface thereof and formed with a cooling structure for cooling the display unit and a microwave shielding structure for preventing microwave leakage. 
     According to one embodiment of the present disclosure, a cooking appliance may include a main body formed with a cavity, and a door opening and closing the cavity. 
     The door may include a display module disposed in front of the door, a cooling flow path unit disposed behind the display module that has a flow path through which air for cooling flows formed therein, and a shielding unit disposed behind the cooling flow path unit that is configured to shield electromagnetic waves generated from the main body. 
     The air flowing through the cooling flow path unit may be branched from an inside of the cooling flow path unit to be discharged to the top and bottom of the display module. 
     In the cooking appliance according to this embodiment, a supporter and a third camera may be mounted on an angle adjustment unit. The third camera may be mounted on the supporter, and the supporter may be mounted on one side surface of the angle adjustment unit. 
     Accordingly, the angle adjustment unit may be formed with a through portion formed so that a gaze (e.g., observation) of the third camera passes through a bracket. The gaze of the third camera may look into a cavity through the through portion. 
     The angle adjustment unit may be provided to have an inclination with respect to a front-rear direction of the door. Accordingly, the supporter and the third camera mounted on the angle adjustment unit may also be provided to be inclined with respect to the front-rear direction of the door, and a gaze direction of the third camera may also be disposed to be inclined with respect to the front-rear direction of the door. 
     Specifically, the gaze direction of the third camera may form an acute angle with the front-rear direction of the door, and the third camera may be provided to look in a downward direction at the cavity disposed behind the door. 
     The third camera may be mounted at a location spaced upward from a center of the frame, and the gaze direction may form an acute angle with the front-rear direction of the door. Accordingly, the third camera may capture an image of food while looking down at the food placed in the cavity. 
     In the cooking appliance according to this embodiment, as the blowing fan rotates, the external air may flow into the door through the inlet of the air guide, and flow to be discharged to the outside of the door through the first outlet and the second outlet. 
     The air forcibly flowing by the blowing fan may specifically have the following flow path of airflow: 
     The air may flow into the door from a first aperture of the outer panel and the inlet provided at a location corresponding thereto. The air flowing into the door may flow in a downward direction from the door to flow into the blowing fan. 
     The air may pass through the blowing fan in a front-rear direction of the door. At this time, the air may pass through the mounting hole of the air guide while passing through the blowing fan. The flow direction of the air may be changed from an up-down direction to a front-rear direction of the door in the blowing fan. 
     As the front of the mounting hole is closed by the display unit, the air passed through the mounting hole may be branched in front of the air guide in the up-down direction. 
     A part of the branched air may flow in an upper direction of the door to be discharged through the first outlet. Another part of the branched air may flow in a downward direction of from the door to be discharged through the second outlet. 
     Air branched from the first outlet and the second outlet may surround the entire door. In particular, the branched air may surround a front portion of the door. This structure can allow the air discharged through the first outlet and the second outlet to form the air curtain on the door, thereby effectively suppressing the heat and oil mist generated from the heating cooking device disposed below the cooking appliance from permeating into the door. 
     In the cooking appliance according to this embodiment, a mounting member may include a first piece and a second piece. The first piece may be provided to protrude from a body, and be elastically deformed in a state in which the mounting member is detachable attached to the bracket. 
     The second piece may be provided to protrude from an end of the first piece, and suppress the mounting member from being separated from the bracket in a state in which the mounting member is fitted into the bracket. 
     The bracket may be formed with an insertion hole into which the mounting member may be inserted and fitted at locations corresponding to the first piece and the second piece. 
     The second piece may be formed to be bent from the first piece. When the supporter and the third camera are mounted on the bracket, the first piece may be pressed by a user and thus elastically deformed, and accordingly, the second piece may be fitted into the insertion hole. 
     When the supporter is completely mounted on the bracket, the first piece returns to its original shape. The first piece may function as a stopper preventing the supporter from being separated from the insertion hole. Accordingly, the supporter may be stably mounted on the bracket without being separated from the bracket. 
     When the supporter is removed from the bracket, the first piece may be pressed by the user and thus elastically deformed, and a location of the second piece may be moved to move out of the insertion hole. Accordingly, the supporter can be easily removed from the bracket. 
     In the cooking appliance according to the present disclosure, a door may be formed having a display structure, a cooling structure, and an electromagnetic wave shielding structure. The display structure, the cooling structure, and the shielding structure can be coupled with each other to form a slim door. Accordingly, even when all of the display structure, the cooling structure, and the shielding structure are formed on the door, the thickness of the door may not be increased. 
     In the cooking appliance according to the present disclosure, since the display module is provided on the front of the door, the user is able to know the cooking situation in the cooking appliance via the display module. The display module can also serve as the hub of another home appliance to provide various types of information to the user, thereby enhancing the user&#39;s convenience. 
     In addition, in the cooking appliance according to the present disclosure, the airflow discharged to the outside of the door through the first outlet and the second outlet can form an air curtain, so that the heat and oil mist rising from the heating cooking device disposed below the cooking appliance can be effectively blocked by the air curtain. 
     Accordingly, various electronic parts including the display unit provided on the door may be suppressed or prevented from being damaged or degraded by the heat and contaminants such as oil mist. In addition, the display unit may be prevented from being contaminated by the heat and the oil mist. 
     In addition, in the cooking appliance according to the present disclosure, the third camera can be mounted on the bracket formed on the frame, the third camera can capture an image inside the cavity, and the control unit provided in the cooking appliance can display the cooking situation of food placed in the cavity as images. Accordingly, the user can conveniently check the situation in which food is being cooked through the display unit. 
     In addition, in the cooking appliance according to the present disclosure, the third camera can capture the food placed on the bottom surface of the cavity while looking down at the food, thereby providing the user with the image of the food as a whole. Accordingly, the user can conveniently and easily check the cooking situation of food through the captured image. 
     In addition, in the cooking appliance according to the present disclosure, the supporter may be provided with the mounting member and the support member disposed at the locations spaced apart from each other. The mounting member may be provided to be easily detachable from the bracket of the frame. Thus, the supporter may be brought into close contact with the bracket of the frame to support the support member, thereby suppressing the support member from shaking due to external vibration. 
     Accordingly, the supporter can be easily detached from the frame, thereby easily performing the task of mounting the third camera on the frame, or replacement or repair work. In addition, the third camera may be suppressed or prevented from being shaking due to external vibration in the state in which the third camera is mounted on the frame, thereby improving the capturing quality of the third camera. 
     In addition, in the cooking appliance according to the present invention, the airflow discharged to the outside of the door through the first outlet and the second outlet provided in the door can form an air curtain, thereby effectively blocking the heat and oil mist rising from the heating cooking device disposed below the cooking appliance. 
     Accordingly, various electronic parts including the display unit provided on the door may be suppressed or prevented from being damaged or degraded by the heat and the oil mist. 
     In addition, in the cooking appliance according to the present disclosure, the air flowing inside the door can be discharged through the first outlet to cool an entire front surface of the display unit. In addition, the air flowing inside the door can cool the heat-generating parts mounted on the rear surface of the display unit and inside the door. 
     The objects of the present disclosure are not limited to the above-described objects, and other objects and advantages not mentioned may be understood by the following description, and will be more clearly understood by the embodiments of the present disclosure. In addition, it will be easily seen that the objects and advantages of the present disclosure may be realized by the means described in the claims and combinations thereof. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The accompanying drawings constitute a part of this specification and illustrate one or more embodiments of the present disclosure and together with the specification, explain the present disclosure. 
         FIG.  1    is a perspective view illustrating a cooking appliance according to an embodiment of the present disclosure. 
         FIG.  2    is a view illustrating a state in which a door in  FIG.  1    has been opened. 
         FIG.  3 A  is a perspective view illustrating a door of the cooking appliance according to an embodiment of the present disclosure. 
         FIG.  3 B  is a view of  FIG.  3 A  from another direction. 
         FIG.  4 A  is a rear view of the door. 
         FIG.  4 B  is an exploded perspective view illustrating a part of the door according to an embodiment of the present disclosure. 
         FIG.  4 C  is a view of  FIG.  4 B  from another direction. 
         FIG.  5    is an exploded perspective view of the door according to an embodiment of the present disclosure. 
         FIG.  6    is a view of  FIG.  5    from another direction. 
         FIG.  7    is a side cross-sectional view of the door according to an embodiment of the present disclosure. 
         FIG.  8    is a perspective view illustrating an outer panel according to an embodiment of the present disclosure. 
         FIG.  9 A  is a rear view illustrating the outer panel according to an embodiment of the present disclosure. 
         FIG.  9 B  is a view of  FIG.  8    from another direction. 
         FIG.  10    is an exploded perspective view of a display unit and the outer panel. 
         FIG.  11    is a view illustrating an inner panel and an air guide according to an embodiment of the present disclosure. 
         FIG.  12    is an exploded perspective view of  FIG.  11   . 
         FIG.  13    is a view of  FIG.  12    from another direction. 
         FIG.  14 A  is a rear view of the door according to an embodiment of the present disclosure. 
         FIG.  14 B  is an enlarged view of a part of  FIG.  14 A . 
         FIG.  15    is a front view of a frame in a state in which a third camera is mounted. 
         FIG.  16    is an exploded perspective view of  FIG.  15   . 
         FIG.  17    is a view of  FIG.  16    from another direction. 
         FIG.  18    is an enlarged view of a portion of the frame on which the third camera is mounted. 
         FIG.  19    is an exploded view of  FIG.  18   . 
         FIG.  20    is a cross-sectional view illustrating a state in which a supporter and the third camera are mounted on the frame maccording to an embodiment of the present disclosure. 
         FIG.  21    is a rear view of  FIG.  20   . 
         FIG.  22    is a cross-sectional perspective view illustrating the state in which the supporter and the third camera are mounted on the frame according to an embodiment of the present disclosure. 
     
    
    
     DETAILED DESCRIPTION OF EXEMPLARY EMBODIMENTS 
     The above-described objects, features, and advantages will be described below in detail with reference to the accompanying drawings, and accordingly, those skilled in the art to which the present disclosure pertains will be able to easily practice the technical spirit of the present disclosure. In describing the present disclosure, when it is determined that a detailed description of a known technique related to the present invention may unnecessarily obscure the gist of the present disclosure, the detailed description will be omitted. Hereinafter, embodiments according to the present disclosure will be described in detail with reference to the accompanying drawings. In the drawings, the same reference numerals are used to indicate the same or similar components. 
     Although the first, second, etc. are used to describe various components, it is understood that these components are not limited by these terms. These terms are only used to distinguish one component from other components, and unless otherwise stated, it is understood that the first component may also be the second component. 
     As used herein, unless specifically stated otherwise, each component may be singular or plural. 
     As used herein, the singular expression includes the plural expression unless the context clearly dictates otherwise. In the present disclosure, terms such as “consisting of” or “comprising” should not be construed as necessarily including all of the various components or various steps described in the specification, and should be construed that some components or some steps may not be included, or additional components or steps may be further included. 
     As used herein, various singular forms “a,” “an” and “the” are intended to include various plural forms as well, unless context clearly indicates otherwise. For example, a term “a” or “an” shall mean “one or more,” even though a phrase “one or more” is also used herein. Use of the optional plural “(s),” “(es),” or “(ies)” means that one or more of the indicated feature is present. 
     As used herein, when “A and/or B” is used, it means A, B or A and B, unless specifically stated otherwise, and when “C to D” is used, it means greater than or equal to C and smaller than or equal to D unless specifically stated otherwise. 
     As used herein, “up-down direction” means the up-down direction of the cooking appliance in a state in which the cooking appliance (or other components) is installed for daily use. “Left-right direction” means a direction perpendicular to the up-down direction, and the front-rear direction means a direction perpendicular to both the up-down direction and the left-right direction. “Bilateral direction” or “lateral direction” has the same meaning as the left-right direction, and these terms may be used interchangeably in the present specification. 
     Various terminology used herein can imply direct or indirect, full or partial, temporary or permanent, action or inaction. For example, when an element is referred to as being “on,” “connected” or “coupled” to another element, then the element can be directly on, connected or coupled to the other element or intervening elements can be present, including indirect or direct variants. In contrast, when an element is referred to as being “directly connected” or “directly coupled” to another element, there are no intervening elements present 
       FIG.  1    is a perspective view illustrating a cooking appliance according to one embodiment of the present disclosure.  FIG.  2    is a view showing a state in which a door  20  of  FIG.  1    is in an open state. 
     The cooking appliance according to the embodiment may be disposed at a location spaced apart from a heating cooking device in an up-down direction above a location where the heating cooking device, for example, a heating-type oven, a gas range, etc. is disposed. 
     The placement of the cooking appliance allows a user to conveniently use cooking devices including the cooking appliance. In addition, the cooking appliance may function as a hood of the heating cooking device disposed thereunder. In this case, the cooking appliance may be provided with components for use as a hood. 
     The cooking appliance may cook food using microwaves, and/or heater heat, which are type(s) of electromagnetic waves. The cooking appliance may include a main body  10  in which a cavity  11  is formed, and a door  20  that opens and closes to provide access to the cavity  11 . 
     Food to be cooked may be placed inside the cavity  11 . The door  20  may be disposed in front of the cavity  11  and rotatably mounted on the main body  10  to open and close the cavity  11 . 
     A vent hole  13  for discharging the air sucked in a suction unit provided on a lower portion of the main body  10  to the outside may be provided in an upper portion of the main body  10 . The suction unit may be provided at a lower portion of the main body  10  of the cooking appliance. Accordingly, the cooking appliance may serve as a hood for suctioning the air discharged from the heating cooking device disposed thereunder to discharge the air to the outside. 
     The main body  10  may further include a front panel  12  provided on an edge of the entrance of the cavity  11 , and having one surface disposed to face one surface of a choke member  170  when the door  20  is closed to close the cavity  11 . 
     The front panel  12  may be provided to surround an edge of the entrance of the cavity  11  and protrude with a predetermined width. Accordingly, when the door  20  is closed, the edge portion of the door  20  and the cavity  11  may overlap each other. 
     This structure can allow the front panel  12  to seal the cavity  11  in a state in which the door  20  is closed, thereby suppressing the oil, moisture, oil mist, etc. generated in the process of cooking food placed in the cavity  11  from being discharged to the outside through an inlet of the cavity  11 . 
       FIG.  3 A  is a perspective view illustrating the door  20  of the cooking appliance according to one embodiment of the present disclosure.  FIG.  3 B  is a view of  FIG.  3 A  from another direction.  FIG.  4 A  is a rear view of the door  20 .  FIG.  4 B  is an exploded perspective view showing a part of the door  20  according to one embodiment.  FIG.  4 C  is a view of  FIG.  4 B  from another direction. 
     The door  20  may include a display module  21 , a cooling flow path unit  22 , and a shielding unit  23 . The display module  21  may be disposed in front of the door  20 . The user may see the inside of the cavity  11  of the cooking appliance through the display module  21 . 
     The cooling flow path unit  22  may be disposed behind the display module  21 , and a flow path through which air for cooling flows may be formed therein. The air flowing into the door  20  may flow into the door  20  through the cooling flow path unit  22  to cool the door  20 . 
     The shielding unit  23  may be disposed behind the cooling flow path unit  22 , and may shield electromagnetic waves generated from the main body  10 . The shielding unit  23  may protect the user by blocking the electromagnetic waves generated in the cavity  11  and propagating to the outside of the cooking appliance. The shielding unit  23  may be disposed behind the display module  21 . 
     For example, the shielding unit  23  may serve to block the electromagnetic waves (microwaves) generated to cook food in the main body  10  from being discharged to the outside of the door  20 . 
     The cooling flow path unit  22  may be provided to cool electronic components mounted inside the door  20 , including a display unit  110  mounted on the display module  21 . The air for cooling the door  20  may flow inside the cooling flow path unit  22 . The display unit  110  may be formed in a thin shape and provided so that an area of the display unit  110  occupies most of one surface of the door  20 . 
     Accordingly, the display unit  110  may be formed to occupy a substantial portion of the front portion of the door  20 , and the placement area of the display unit  110  can be increased, thereby improving user visibility. A display unit  110  having a large screen allows the user to more conveniently check various types of information. 
     Since the size of the display unit  110  is increased, the amount of heat generated may increase. Accordingly, the display unit  110  in the door  20  must be effectively cooled. In the embodiment, the cooling flow path unit  22  through which the cooling air flows may be separately provided. 
     The cooling flow path unit  22  may be disposed behind the display unit  110  so that cooling air flows, and thus the display unit  110  may be effectively cooled by the air flowing through the cooling flow path unit  22 . In addition, a heat-generating part mounted on the display module  21  may be cooled by the air flowing through the cooling flow path unit  22 . In other words, the cooling flow path unit  22  may cool the display module  21  provided with the display unit  110  and other heat-generating parts. 
     In order to effectively cool the display unit  110 , the entire display unit  110  may be provided to be exposed to the air flowing through the cooling flow path unit  22 . In addition, the airflow discharged to the outside of the door  20  through the cooling flow path unit  22  may form an air curtain to block heat and oil mist rising from the heating cooking device disposed below the cooking appliance. 
     To this end, the air flowing through the cooling flow path unit  22  may be branched inside the cooling flow path unit  22  and discharged to the top and bottom of the display module  21 . 
     The cooling air is branched inside the cooling flow path unit  22  and discharged to the top and bottom of the display module  21 , so that the cooling air can flow while in contact with the entire rear surface of the display unit  110  to effectively cool the display unit  110 . 
     In addition, the cooling air is discharged to each of the top and bottom of the display module  21  to effectively form the air curtain around the display and the door  20 , so that the heat and oil mist rising from the heating cooking device disposed below the cooking appliance can be blocked by the air curtain. 
     The display module  21  may be provided with the display unit  110 , a camera, and other electronic parts, and the cooling flow path unit  22  may be provided with electronic parts such as a blowing device  150  operated by a motor. Accordingly, the shielding unit  23  configured to shield the electromagnetic waves generated from the main body may be provided behind the cooling flow path unit  22  in order to protect the user and the electronic parts from electromagnetic waves. 
     The display unit  110  and various electronic parts may be disposed in the display module  21 , the cooling flow path unit  22  in which the flow path of the air for cooling the display module  21  is formed may be disposed behind the display module  21 , and the shielding unit  23  configured to shield electromagnetic waves from contacting the electronic parts provided in the display module  21  may be disposed behind the cooling flow path unit  22 . 
     In the embodiment, the display module  21  configured to provide various types of information and convenience to the user may be disposed on the front surface of the cooking appliance, e.g., on the front of the door  20 . In addition, in the embodiment, there is a need for a structure that cools the parts such as the display unit  110  provided in the display module  21 , cools the inside of the door  20  provided with the display unit  110  and the like, and at the same time, forms the flow path of the cooling air for forming the air curtain around the door  20 , and also protects the electronic parts mounted on the door  20  from electromagnetic waves. 
     To satisfy one or more of the above needs, the display module  21  may be disposed at the front of the door  20 , the cooling flow path unit  22  may be disposed behind the display module  21 , and the shielding unit  23  may be disposed behind the cooling flow path unit  22 . 
     In other words, the display module  21 , the cooling flow path unit  22 , and the shielding unit  23  may be sequentially disposed on the door  20  from the front to rear in the door  20 . 
     In addition, the display module  21 , the cooling flow path unit  22 , and the shielding unit  23  may be provided to be coupled to each other to prevent the cooling air from flowing out to the outside of the door  20  through other portions other than a first outlet  123  disposed at an upper portion of the display module  21  and a second outlet  124  at a lower portion of the display module  21 . Hereinafter, the door  20  implemented using the above-described structure will be described in more detail. 
     The display module  21  may include the first outlet  123  and the second outlet  124 . The first outlet  123  may be disposed at the upper portion of the display module  21 , and the air flowing inside the display module  21  may be discharged to the outside through the first outlet  123 . 
     The second outlet  124  may be disposed at the lower portion of the display module  21 , and the air flowing inside the display module  21  may be discharged to the outside through the second outlet  124 . In other words, the air flowing inside the door  20  may be discharged to the outside through the first outlet  123  and the second outlet  124  respectively disposed at the upper and lower portions of the door  20 , so that the air can flow through all or substantially all of the inside of the door  20  to cool the entire door  20 . 
     The display module  21  may include the display unit  110  and an outer panel  120 . The display unit  110  may be disposed on the front surface of the door  20  to display videos or images. 
     The display unit  110  may display information related to the cooking operation to provide the information to the user. In addition, the display unit  110  may receive a user&#39;s command in a touch recognition method. 
     Meanwhile, the display unit  110  may be connected to communicate with other appliances, cameras, locks, etc. provided in the front door. In addition, the display unit  110  may be connected to communicate with an external device required by the user. 
     The user may receive information necessary for operations of home appliances, visits by outsiders, and other aspects of daily life from the display unit  110 , and transmit commands to home appliances and other devices connected to the display unit  110  using the display unit  110 . 
     Accordingly, the door  20  including the display unit  110  may serve as a kind of Internet of Things (IoT) hub that transmits information about home appliances and other devices necessary for daily life to the user, and transmits the user&#39;s commands to these devices. 
     The outer panel  120  may be disposed behind the display unit  110 , and the display unit  110  may be mounted thereon. The outer panel  120  may have a hollow  1201  and may be provided in a shape having a predetermined width in the front-rear direction of the door  20 . 
     The hollow  1201  of the outer panel  120  may be closed by the rear surface of the display unit  110 . The air flowing inside the outer panel  120  may collide with the rear surface of the display unit  110  exposed to the hollow  1201  of the outer panel  120 . Accordingly, the air flowing inside the outer panel  120  may come into contact with the rear surface of the display unit  110  to cool the display unit  110 . 
     In addition, the air passing through a blowing fan  152  may be exposed to the hollow  1201  of the outer panel  120  to cool heat-generating parts such as, for example, a speaker  260 , a microphone  270 , a communication unit  280 , and a control board  290  to be disposed. 
     Since the outer panel  120  has the above-described structure, the outer panel  120  may have an interior space, and various parts may be built in in the interior space. A width in the front-rear direction of the door  20  may be substantially determined by the outer panel  120 . 
     A first aperture  121  into which air flows may be formed in an upper end of the outer panel  120 . A plurality of first apertures  121  may be provided. Each of the first apertures  121  may be provided so that a plurality of slit-shaped holes are arranged at intervals. This structure can suppress or prevent foreign substances from flowing into the door  20  through the first aperture  121 . 
     A handle  122  may be provided at one side of the outer panel  120  for a user to open and close the door  20 . The handle  122  may be formed, for example, by recessing a side portion of the outer panel  120 . 
     A button device  300  may be mounted on one side of the outer panel  120 , for example, below a location where the handle  122  is formed. The user may supply power to the cooking appliance or cut off the power supply by manipulating the button device  300 . Specific manipulation for the operation of the cooking appliance is possible by inputting commands into the display unit  110 . 
     The outer panel  120  may support various components such as the display unit  110 , the speaker  260 , the microphone  270 , the communication unit  280 , and the control board  290 . The outer panel  120  may be formed with the first aperture  121  into which external air flows, and the first outlet  123  and the second outlet  124  through which air is discharged. 
     The door  20  may be provided with a camera. The camera may capture at least one place among the front or the lower portion of the door  20 , or the cavity  11 . 
     The images captured by the camera may be transmitted to and reproduced on the display unit  110 , and the user may view images inside the cavity  11  or of the lower portion of the cooking appliance through the display unit  110 . The camera may include any number of cameras, including a first camera  210 , a second camera  220 , and a third camera  230 . 
     The first camera  210  may be mounted on a lower portion of the outer panel  120  to capture a state of the lower portion of the door  20 . The first camera  210  may be mounted on a lower portion of the display module  21 . Since the first camera  210  is mounted on the lower portion of the outer panel  120  so that a gaze direction faces the lower portion of the cooking appliance, the first camera  210  may also capture the heating cooking device disposed below the cooking appliance. 
     The user may observe the state of the heating cooking device and the state of food being cooked on the heating cooking device by the image captured by the first camera  210  and reproduced on the display unit  110 . 
     The second camera  220  may be disposed on the upper portion of the door  20  and may capture the front of the door  20 . The second camera  220  may also capture the front of the cooking appliance. 
     The second camera  220  may be provided to pass through a baffle  190  and a front cover  200 , which will be described in more detail below. The user may observe the situation in front of the cooking appliance captured and recorded by the second camera  220 . 
     The second camera  220  may also capture the user positioned in front of the cooking appliance. Accordingly, the second camera  220  may be used for the user to make a video call with other people in a remote location outside the front door using the display unit  110 . 
     The third camera  230  may be mounted on a frame  160  to be described in more detail below, may be disposed to face the cavity  11 , and may capture the cavity  11 . In other words, the gaze of the third camera  230  may be provided to face the cavity  11  to capture the situation inside of the cavity  11 . The user may observe a situation in which food is being cooked in the cavity  11  through the image(s) captured by the third camera  230 . 
     The door  20  may include a human detection unit  240  configured to detect the presence of the user in front of the cooking appliance. The human detection unit  240  may be disposed on the upper portion of the door  20 , mounted by passing through the baffle  190  and the front cover  200 , disposed at a location spaced apart from the second camera  220 . 
     The human detection unit  240  may detect whether there is a person in front of the door  20  by, for example, infrared recognition or gesture recognition. A control unit provided in the cooking appliance may identify whether there is a user in front of the cooking appliance through the human detection unit  240 . 
     When there is a user in front of the cooking appliance, for example, the control unit may operate the display unit  110  to activate the functions of the cooking appliance necessary for the user&#39;s convenience and safety by taking an action to enable the user to use the display unit  110 . 
     Referring to  FIG.  4 A , a hinge device  162  may be provided on one side of the frame  160 . The hinge device  162  of the frame  160  may be coupled to the main body  10  of the cooking appliance. The frame  160  is hinge-rotated with respect to the main body  10  by the hinge device  162 , and accordingly, the door  20  may open and close to provide access to the cavity  11  of the main body  10 . 
     The door  20  may include a latch  250  mounted on the side of the frame  160 , which has a part formed to protrude from the frame  160 . The latch  250  may be formed in a structure that is caught or latched in a groove formed in the front panel  12  of the door  20 . The latch  250  may maintain the closed state of the door  20 . 
       FIG.  5    is an exploded perspective view of the door  20  according to one embodiment of the present disclosure.  FIG.  6    is a view of  FIG.  5    from another direction. 
     The cooling flow path unit  22  may include an inner panel  130 , an air guide  140 , and/or a blowing device  150 . 
     The inner panel  130  may be disposed behind the outer panel  120  and mounted on the outer panel  120 . The air guide  140  to be described below may be mounted on the inner panel  130 . The inner panel  130  along with the air guide  140  may form a space in which the air suctioned into the door  20  flows. The inner panel  130  may be mounted with the air guide  140  and coupled to the frame  160  to provide the space in which the air flowing into the door  20  flows. 
     The air guide  140  may be disposed between the outer panel  120  and the inner panel  130 , and coupled to the inner panel  130 . The air guide  140  may guide the flow of air flowing into the door  20  from the outside, and form the space in which the air may flow. 
     The blowing device  150  may be mounted on the air guide  140 . The blowing device  150  may forcibly flow the air flowing into the air guide  140  from the rear to the front of the air guide  140 . 
     The door  20  may further include the frame  160 , the choke member  170 , the baffle  190 , and the front cover  200 . 
     The frame  160  may be disposed behind the inner panel  130 . The frame  160  may be coupled to the inner panel  130 , and may have one side rotatably coupled to the main body  10 . Accordingly, as the frame  160  rotates, the door  20  may be rotated to open and close the cavity  11  of the cooking appliance. 
     The frame  160  may be coupled to the inner panel  130  to form a flow path of air for cooling. The frame  160  may also form an inner surface of the door  20  with a shielding structure for preventing the leakage of electromagnetic waves, that is, the choke member  170 . 
     The choke member  170  may be disposed behind the frame  160 , may be coupled to the frame  160 , and may block the electromagnetic waves generated from the main body  10  from being discharged to the outside. The choke member  170  may be generally provided in a quadrangular shape having a hollow, and provided to surround an edge portion of the frame  160 . It is understood that the choke member  170  is not limited to any particular shape. 
     The display module  21  may further include the baffle  190  and the front cover  200 . The baffle  190  may be disposed in front of the display unit  110 , may surround the edge of the display unit  110 , and may be coupled to the outer panel  120  to mount the display unit  110  on the outer panel  120 . 
     The baffle  190  is generally formed in a quadrangular shape having a hollow to surround the edge of the display unit  110 , and thus may serve as a bezel of the display unit  110 . It is understood that the baffle  190  is not limited to any particular shape. 
     The front cover  200  may be disposed in front of the baffle  190 , and provided to surround the edge of the baffle  190 . The front cover  200  may be generally formed in a quadrangular shape having a hollow, and may serve to stably couple the display unit  110  and the baffle  190  to the outer panel  120 . It is understood that the front cover  200  is not limited to any particular shape. 
       FIG.  7    is a side cross-sectional view of the door  20  according to one embodiment of the present disclosure.  FIG.  8    is a perspective view showing the outer panel  120 .  FIG.  9 A  is a rear view showing the outer panel  120 .  FIG.  9 B  is a view of  FIG.  8    from another direction.  FIG.  10    is an exploded perspective view of the display unit  110  and the outer panel  120 .  FIG.  11    is a view showing the inner panel  130  and the air guide  140  according to one embodiment. 
     Referring to  FIG.  10   , the outer panel  120  may include components such as speaker  260 , microphone  270 , and communication unit  280 . At least one speaker  260  may be mounted on the side of the outer panel  120 . The speaker  260  may generate a voice, an alarm sound, etc. related to operations of the cooking appliance. In addition, the speaker  260  may generate voices, alarm sounds, etc. for the door  20  including the display unit  110  of the door  20  to serve as an Internet of Things (IoT) hub. 
     The microphone  270  may be mounted at the top of the outer panel  120  and may receive the user&#39;s voice. The user may input voice commands to operate the cooking appliance through the microphone  270 . In addition, the microphone  270  may function for the door  20  to serve as an Internet of Things hub. 
     The communication unit  280  may be mounted on the outer panel  120  at a location spaced apart from the speaker  260  and the microphone  270 . Since the door  20  may serve as an Internet of Things hub, the communication unit  280  provided in the door  20  may be appropriately provided to perform various types of wired or wireless communication functions to communicate with the Internet. 
     Accordingly, a plurality of communication units  280  may be provided, and each communication unit  280  may be provided as a device corresponding to a different communication method. 
     For example, the communication unit  280  may be provided as a wireless communication device, and each communication unit  280  may be provided as any one of a ZigBee communication device, a Wi-Fi communication device, a jet wave communication device, and a Bluetooth communication device. However, the communication method of the communication unit  280  is not limited thereto, and the communication unit  280  may also be provided as a wired communication device. 
     Meanwhile, the control board  290  for controlling the cooking appliance may be mounted on the outer panel  120 . A control unit configured to control the cooking appliance may be implemented on the control board  290 . 
     The outer panel  120  may be provided with a holder  120   a , an opening hole  120   b , a first through hole  120   c , a second through hole  120   d , a mounting guide  120   e , and a fitting projection  120   f.    
     The holder  120   a  may be provided to support the speaker  260 . The holder  120   a  may be formed to protrude from an inner wall of the outer panel  120 , a part of which may have an arc shape to correspond to a circular shape of the speaker  260 . 
     The speaker  260  may be mounted on the holder  120   a  and provided on the outer panel  120 . Since a pair of speakers  260  are provided, a pair of holders  120   a  may also be provided and formed at a location corresponding to each of the pair of speakers  260 . 
     The opening hole  120   b  may be formed to pass through the bottom of the outer panel  120 . The first camera  210  may be disposed at a location adjacent to the opening hole  120   b  to be able to view the lower side of the outer panel  120  through the opening hole  120   b.    
     The first through hole  120   c  may be formed in the side of the outer panel  120 . The first through hole  120   c  may be provided adjacent to a location where the speaker  260  is disposed. The first through hole  120   c  may allow the speaker  260  to communicate with the outside and at the same time, may be formed in a mesh shape in order to suppress the speaker  260  from being exposed to the outside. 
     The speaker  260  may communicate with the outside of the outer panel  120  through the first through hole  120   c  to effectively transmit an alarm and other voices to the user. Since a pair of speakers  260  are provided, a pair of first through holes  120   c  may also be provided and formed at a location corresponding to each of the pair of speakers  260 . 
     The second through hole  120   d  may be formed in a lower portion of one side of the outer panel  120  to pass through the outer panel  120 . A part of the button device  300  mounted inside the outer panel  120  through the second through hole  120   d  may be exposed to the outside of the outer panel  120 . The user may manipulate the button device  300  by contacting the exposed portion of the outer panel  120 . 
     The mounting guide  120   e  may be formed on the inner wall of the outer panel  120  to support the plurality of communication units  280 . Accordingly, the mounting guide  120   e  may be provided in the same number as the plurality of communication units  280 . The mounting guide  120   e  may guide the communication unit  280  to be mounted on the outer panel  120 . 
     For example, the mounting guide  120   e  may be provided so that a projection having a shape corresponding to the edge of the communication unit  280  is formed on the inner wall of the outer panel  120 . Each of the plurality of mounting guides  120   e  may be provided to have a shape and size corresponding to the shape and size of each of the plurality of communication units  280 . 
     The fitting projection  120   f  may be formed to protrude from the inner wall of the outer panel  120 . A plurality of fitting projections  120   f  may be provided and disposed to be spaced apart from each other. The control board  290  may be fitted onto the fitting projections  120   f . For example, the fitting projection  120   f  may be disposed at a location adjacent to the edge of the plate-shaped control board  290 . 
     Accordingly, the control board  290  may have corners fitted onto the fitting projections  120   f  and may be mounted on the outer panel  120 . A shape fitting structure corresponding to the shape of the control board  290  may be formed on the fitting projection  120   f  so that the corner of the control board  290  is fitted. 
     As shown in  FIG.  8   , the first outlet  123  may be disposed on the upper portion of the outer panel  120 , and the second outlet  124  may be disposed on the lower portion of the outer panel  120 . 
     The first outlet  123  may be disposed on the upper portion of the outer panel  120 , and the air flowing by the blowing device  150  may be discharged to the outside. The second outlet  124  may be disposed on the lower portion of the outer panel  120 , and the air flowing by the blowing device  150  may be discharged to the outside. 
     Meanwhile, referring to  FIG.  3 B , when the door  20  is assembled, the first outlet  123  and the second outlet  124  may be partially blocked by the baffle  190  and the front cover  200 . Holes for discharging air may thus be formed at locations corresponding to the first outlet  123  and the second outlet  124  in the baffle  190 . 
     The first outlet  123  may be provided at a location adjacent to an upper end of the display unit  110 , and the second outlet  124  may be provided at a location adjacent to a lower end of the display unit  110 . Accordingly, the air forcibly flowing inside the door  20  by the blowing device  150  may be discharged to the outside at locations adjacent to the upper and lower ends of the display unit  110  through the first outlet  123  and the second outlet  124 . 
     The air discharged through the first outlet  123  may form an air curtain on the upper portion of the door  20 . In addition, the air discharged through the second outlet  124  may form an air curtain on the lower portion of the door  20 . 
     The air curtain blocks the permeation of an external airflow into the door  20 . In the embodiment, a boundary surface or a boundary zone in which the flow of air discharged from the inside of the door  20  through the first outlet  123  and the second outlet  124  forms a boundary against the flow of the external air may be referred to as an air curtain. 
     The air curtain formed by the air discharged from the inside of the door  20  through the first outlet  123  and the second outlet  124  may suppress the permeation of external air into the door  20 . 
     Since the heating cooking device is disposed below the cooking appliance, the heat generated when the heating cooking device is used and the oil mist generated from the food being cooked may rise and permeate into the cooking appliance. 
     The heat transmitted from the heating cooking device to the cooking appliance may damage parts of the door  20  provided in the cooking appliance. In particular, parts in which the display unit  110  and circuits, elements, etc. related to its operation are embedded may be vulnerable to heat. 
     In addition, the oil mist transmitted from the food being cooked may be attached to the door  20  provided in the cooking appliance. The oil mist may be attached to the surface of the display unit  110  to lower the image quality of the display unit  110 , and attached to the surfaces of other parts mounted on the door  20  to damage these parts. 
     In the embodiment, the airflow discharged to the outside of the door  20  through the first outlet  123  and the second outlet  124  provided in the door  20  forms the air curtain, so that the heat and oil mist rising from the heating cooking device disposed below the cooking appliance can be effectively blocked by the air curtain. 
     Accordingly, it is possible to effectively suppress or prevent various electronic parts, including the display unit  110  provided in the door  20 , from being damaged or degraded by the heat and the oil mist. 
     Referring to  FIG.  11   , the air guide  140  may include at least one inlet  141  and a mounting hole  142 . The inlet  141  may be disposed on an upper portion of the air guide  140  and external air may be introduced through the inlet  141 . 
     The inlet  141  may be disposed at a location corresponding to the first aperture  121  provided on the upper portion of the outer panel  120 . Accordingly, the external air may pass through the first aperture  121  of the outer panel  120  to flow into the door  20  through the inlet  141 . 
     The mounting hole  142  may be formed in a lower portion of the inlet  141  in the air guide  140  (below the inlet  141 ), and the blowing device  150  may be mounted therein. The mounting hole  142  may be formed to pass through the air guide  140  in the front-rear direction of the door  20 . 
     Accordingly, air may flow from the upper portion to the lower portion of the air guide  140  through the inlet  141 , and its direction may be changed, so that the air may flow from the rear to the front of the air guide  140  through the mounting hole  142 . 
     The blowing device  150  may include a casing  151  and the blowing fan  152 . The casing  151  may be disposed in the mounting hole  142  and formed with a hollow, and the blowing fan  152  may be mounted in the hollow. 
     The blowing fan  152  may be rotatably mounted in the casing  151 , and may flow air from the rear to the front of the air guide  140 . The blowing fan  152  may receive electricity and rotate to flow air inside the door  20 . 
     By the rotation of the blowing fan  152 , external air may flow into the door  20  through the inlet  141 , and may be discharged to the outside of the door  20  through the first outlet  123  and the second outlet  124 . The mounting hole  142  of the air guide  140  may be formed in the middle of the casing  151  and formed to correspond to the location, area, and shape of the hollow in which the blowing fan  152  is disposed. 
     Hereinafter, the airflow inside the door  20  will be described in more detail with reference to  FIG.  7   . In  FIG.  7   , the airflow is indicated by arrows. 
     As the blowing fan  152  rotates, external air may flow into the door  20  through the inlet  141  of the air guide  140 , and flow to be discharged to the outside of the door  20  through the first outlet  123  and the second outlet  124 . 
     The air forcibly flowing by the blowing fan  152  may specifically have the following flow path of the airflow: 
     The air may flow into the door  20  from the first aperture  121  of the outer panel  120  and the inlet  141  provided at a location corresponding thereto. The air flowing into the door  20  may flow downward from the door  20  to flow into the blowing fan  152 . 
     The air may pass through the blowing fan  152  in the front-rear direction of the door  20 . At this time, the air may pass through the mounting hole  142  of the air guide  140  while passing through the blowing fan  152 . The flow direction of the air in the blowing fan  152  may be changed from the up-down direction of the door  20  to the front-rear direction thereof. 
     Since the front of the mounting hole  142  is blocked by the display unit  110 , the air passing through the mounting hole  142  may be branched in the up-down direction in front of the air guide  140 . 
     A part of the branched air may flow upward from the door  20  and may be discharged through the first outlet  123 . The other part of the branched air may flow downward from the door  20  and may be discharged through the second outlet  124 . 
     The air branched from the first outlet  123  and the second outlet  124  may surround the entire door  20 . In particular, the branched air may surround the front surface of the door  20 . This structure allows the air discharged from the first outlet  123  and the second outlet  124  to form an air curtain on the door  20 , thereby suppressing or preventing the heat and oil mist generated from the heating cooking device disposed below the cooking appliance from permeating the door  20 . 
     Meanwhile, at least a part of the air discharged from the first outlet  123  may contact the front surface of the display unit  110  while moving downward by gravity to cool the display unit  110 . 
     In addition, the above-described airflow structure inside the door  20  allows the air flowing into the door  20  to flow through the entire inside of the door  20 . For example, the air may flow in the entire space formed by the rear surface of the display unit  110  and the outer panel  120 . 
     Accordingly, the air flowing inside the door  20  may cool the entire rear surface of the display unit  110 , and thus cool the outer panel  120  and other parts mounted on other portions of the door  20 . 
     In particular, the outer panel  120  may be provided with parts that generate heat, such as the speaker  260 , the microphone  270 , the communication unit  280 , and the control board  290 . These heat-generating parts may be disposed over the entire outer panel  120 . Accordingly, the air may flow through the entire inside of the outer panel  120 , thereby cooling these heat-generating parts. 
     As shown in  FIG.  7   , the first aperture  121  and the inlet  141  into which air flows may communicate with each other. As the blowing fan  152  rotates, the external air may flow into the air guide  140  through the first aperture  121  and the inlet  141  to flow toward the blowing device  150  through the space formed by the inner panel  130  and the air guide  140 . 
     The air may flow toward the blowing fan  152  of the blowing device  150  in the space formed by the frame  160 . The air may pass through the blowing fan  152  and collide with the rear surface of the display unit  110  disposed to face the blowing fan  152  to cool the display unit  110 . 
     After the air passing through the blowing fan  152  collides with the rear surface of the display unit  110 , the flow may be branched in the upward and downward direction of the display unit  110 . The air directed to the upper side of the display unit  110  may be discharged to the outside of the door  20  through the first outlet  123  provided on the upper portion of the outer panel  120 . The air flowing downward from the display unit  110  may be discharged to the outside of the door  20  through the second outlet  124  provided on the lower portion of the outer panel  120 . 
     In the embodiment, the air flowing inside the door  20  can cool the entire front surface of the display unit  110  while being discharged through the first outlet  123 . In addition, the air flowing inside the door  20  can effectively cool the heat-generating parts mounted on the rear surface of the display unit  110  and inside the door  20 . 
       FIG.  12    is an exploded perspective view of  FIG.  11   .  FIG.  13    is a view of  FIG.  12    from another direction. 
     Referring to  FIG.  13   , the mounting hole  142  may be formed in the middle of the air guide  140 . The casing  151  has a hollow having a location, size, and shape corresponding to the mounting hole  142 , and the blowing fan  152  may be disposed in the hollow. The casing  151  may be disposed at a location corresponding to the hollow and the mounting hole  142  of the air guide  140  and mounted on one surface of the air guide  140 . 
     A hollow  130   a  may be formed in the inner panel  130 . Since the hollow  130   a  of the inner panel  130  is blocked by the frame  160 , the air introduced through the inlet  141  may not leak into the hollow  130   a  of the inner panel  130 . Accordingly, the inner panel  130  and the frame  160  together may form a flow path of the air through which the air cooling the inside of the door  20  flows. 
     The air guide  140  may include an upper portion  140   a  in which the inlet  141  is formed and a lower portion  140   b  in which the blowing device  150  is disposed. When the air guide  140  and the inner panel  130  are coupled, the lower portion  140   b  may be generally disposed at a location corresponding to the hollow  130   a  of the inner panel  130 . 
     When looking down at the air guide  140  from the upper portion of the door  20 , a cross-sectional area of the upper portion  140   a  of the air guide  140  may be formed to be greater than a cross-sectional area of the lower portion  140   b . As the cross-sectional area of the upper portion  140   a  is expanded, the cross-sectional area of the inlet  141  may also be expanded. Accordingly, in the air guide  140 , as the inlet  141  through which air is introduced is expanded, external air may be introduced into the air guide  140 . 
     Meanwhile, the lower portion  140   b  of the air guide  140  has a smaller cross-sectional area than that of the upper portion  140   a , but since the lower portion  140   b  of the air guide  140  corresponds to the hollow  130   a  of the inner panel  130 , the airflow space in the portion corresponding to the lower portion  140   b  may be expanded toward the frame  160  by the hollow  130   a  of the inner panel  130 . As a result, the lower portion  140   b  of the air guide  140  may also have a shape in which the airflow space is expanded by the hollow  130   a  of the inner panel  130 . 
     In other words, the lower portion  140   b  of the air guide  140  corresponding to the hollow  130   a  of the inner panel  130  is formed to have a smaller cross-sectional area than that of the upper portion  140   a  of the air guide  140 , but the flow space of the lower portion  140   b  of the air guide  140  may be expanded to the frame  160  by the hollow  130   a  of the inner panel  130 . 
     Accordingly, the upper portion  140   a  and the lower portion  140   b  of the air guide  140  may have the shape of an expanded cross-sectional area due to the above-described structure. Accordingly, the airflow space formed by coupling the air guide  140  and the inner panel  130  in the structure in which the air guide  140  and the inner panel  130  are coupled may be sufficiently wide, and the air may be smoothly introduced from the outside and may also smoothly pass through the blowing device  150  mounted on the lower portion  140   b  of the inner panel  130 . 
     In addition, due to the decrease in the cross-sectional area of the lower portion  140   b  of the air guide  140 , conversely, the space in which the air passing through the blowing device  150  is discharged from the lower portion  140   b  of the air guide  140  may be expanded. At this time, the air passing through the blowing device  150  may pass through the hollow  1201  of the outer panel  120  and contact the display unit  110  to cool the display unit  110 . 
     The above-described structure allows the door  20  to have a relatively slim overall structure and increase the flow rate of air flowing therein, thereby improving the cooling efficiency of the door  20 . 
       FIG.  14 A  is a rear view of the door  20  according to one embodiment of the present disclosure.  FIG.  14 B  is an enlarged view of a part of  FIG.  14 A .  FIG.  15    is a front view of the frame  160  in the state in which the third camera  230  is mounted. 
     The door  20  may be detachably mounted on the frame  160  and may include a supporter  310  on which the third camera  230  is mounted. The supporter  310  may be mounted on the frame  160 . The supporter  310  may allow the third camera  230  to be mounted at a specific location of the frame  160 . 
     The frame  160  may include a bracket  163 , a window  164 , and a sealing member  165 . The bracket  163  may be formed at a location spaced upward from the center of the frame  160 . Assuming that a line dividing the frame  160  in the up-down direction is the center of the frame  160 , the bracket  163  may be provided at the location spaced upward from the center of the frame  160 , such as shown. 
     The bracket  163  may have an opening  1631  opened in a direction toward the cavity  11  when the door  20  is closed. The bracket  163  may have a three-dimensional shape to adjust the gaze direction of the third camera  230 . In other words, the bracket  163  may be formed by recessing one side surface of the frame  160  when viewing the bracket  163  from the cavity  11 . 
     The window  164  may be disposed behind the bracket  163 , that is, at a location facing the cavity  11  when viewed from the bracket  163 , and mounted in the opening  1631  of the bracket  163 . 
     Hereinafter, when the door  20  is closed, the rear or rear surface may refer to a location, a surface, or a direction that views the cavity  11  when viewed from the door  20 . 
     The window  164  can close the opening  1631  of the bracket  163  to block the inflow of heat and oil mist transferred from the cavity  11  into the bracket  163 , thereby protecting the third camera  230  mounted on the bracket  163 . 
     The window  164  may be made of a transparent material so that the third camera  230  may capture the inside of the cavity  11  through the window  164 . In addition, the window  164  may be made of a material having high heat resistance, such as a quartz material. However, the present invention is not limited thereto. 
     The sealing member  165  may be provided to seal a gap between the opening  1631  and the window  164 . The sealing member  165  may be provided to surround the window  164  at an edge of the opening  1631 , and attached to the bracket  163  and/or the window  164 . 
     Accordingly, the sealing member  165  may be provided in a closed curved shape having a predetermined width. The sealing member  165  may be made of, for example, a silicone resin material having high heat resistance. However, the present invention is not limited thereto. 
     Referring to  FIG.  14 B , the window  164  may include a capturing region  1641  and a masking region  1642 . The capturing region  1641  may be formed in a central portion of the window  164  and provided to be transparent. The gaze of the third camera  230  mounted on the bracket  163  may pass through the capturing region  1641  to capture the cavity  11  of the main body  10 , which is a space in which food is placed and cooked. 
     The masking region  1642  may be provided to surround the capturing region  1641 , and provided to be opaque. The masking region  1642  may be formed at an edge of the window  164 . The masking region  1642  may be formed, for example, by applying an opaque ink or attaching an opaque film to the window  164 . 
     The masking region  1642  may mask the gaze of the third camera  230 . The third camera  230  may be masked by the masking region  1642  to capture the inside of the cavity  11 , and an unnecessary portion may be covered by the masking region  1642 . 
     Accordingly, the capturing region  1641  and a capturing range of the third camera  230  may be adjusted by the masking region  1642 . An area of the masking region  1642  may be selected in consideration of the characteristics of the third camera  230 , the size of the cavity  11 , etc. 
     Meanwhile, by forming the masking region  1642  using a material having an electromagnetic wave blocking effect, the masking region  1642  may also function to block electromagnetic waves generated in the cavity  11  from propagating to the outside of the cooking appliance. 
     In this case, in particular, the electromagnetic waves can propagate to the third camera  230  through the window  164 , thereby preventing the image quality of the third camera  230  from being lowered by noise generated by the electromagnetic waves. 
       FIG.  16    is an exploded perspective view of  FIG.  15   .  FIG.  17    is a view of  FIG.  16    from another direction.  FIG.  18    is an enlarged view of a portion of the frame  160  where the third camera  230  is mounted.  FIG.  19    is an exploded view of  FIG.  18   . 
     The third camera  230  may be coupled to the supporter  310 , for example, by a coupling mechanism  1000 , such as a bolt. 
     Referring to  FIGS.  16  and  17   , the bracket  163  may have the opening  1631  formed at the rear, and may be provided so that a front protrudes and thus a space opened toward the cavity  11 , that is, a space including the opening  1631  is formed. 
     The bracket  163  and the opened space may be formed by recessing the frame  160  toward the front of the door  20 . The supporter  310  and the third camera  230  are mounted on a front surface of the bracket  163 , and are not mounted in the opened space located on a rear surface of the bracket  163 . 
     The rear surface of the bracket  163  may be recessed, and the front surface of the bracket  163  may protrude. The bracket  163  may include an angle adjustment unit  1633  forming a part of the protruding portion. The bracket  163  may be disposed on an upper portion of the bracket  163 , on which the supporter  310  and the third camera  230  are mounted, and formed to be inclined with respect to the up-down direction of the frame  160 . A surface of the angle adjusting unit  1633  may be provided as an inclined surface. 
     The supporter  310  and the third camera  230  may be mounted on the angle adjustment unit  1633 . The third camera  230  may be mounted on the supporter  310 . The supporter  310  may be mounted on one side surface of the angle adjustment unit  1633 . 
     Accordingly, a through portion  1632  may be formed in the angle adjustment unit  1633  so that the gaze of the third camera  230  passes through the bracket  163 . The gaze of the third camera  230  may be directed inside the cavity  11  through the through portion  1632 . 
     The angle adjustment unit  1633  may be provided to have an inclination with respect to the front-rear direction of the door  20 . Accordingly, the supporter  310  and the third camera  230  mounted on the angle adjustment unit  1633  may also be provided to be inclined with respect to the front-rear direction of the door  20 . The gaze direction of the third camera  230  may also be disposed to be inclined with respect to the front-rear direction of the door  20 . 
     Specifically, the gaze direction of the third camera  230  may form an acute angle with the front-rear direction of the door  20 , and the third camera  230  may be provided to look down at the cavity  11  disposed behind the door  20 . 
     The third camera  230  may be mounted at a location spaced upward from the center of the frame  160 , and the gaze direction thereof may form an acute angle with the front-rear direction of the door  20 . Accordingly, the third camera  230  may capture the food while looking in a downward direction at the food placed in the cavity  11 . 
     Since the food is placed on a bottom surface of the cavity  11 , the third camera  230  can effectively capture the food while looking down at the bottom surface of the cavity  11 . 
     In the embodiment, since the third camera  230  captures the food while looking down at the food placed on the bottom surface of the cavity  11 , it is possible to provide the user with an image of the food as a whole and more clearly. Accordingly, the user can conveniently and easily check the cooking situation of food through the captured image. 
     In the embodiment, the third camera  230  may be mounted on the bracket  163  formed on the frame  160  and may capture the cavity  11 . The control unit provided in the cooking appliance may display images of the cooking situation of the food placed in the cavity  11  on the display unit  110 . Accordingly, the user can conveniently check a situation in which food is being cooked through the display unit  110 . 
       FIG.  20    is a cross-sectional view showing a state in which the supporter  310  and the third camera  230  are mounted on the frame according to one embodiment of the present disclosure.  FIG.  21    is a rear view of  FIG.  20   .  FIG.  22    is a cross-sectional perspective view showing the state in which the supporter  310  and the third camera  230  are mounted on the frame. 
     The supporter  310  may be mounted on the frame, and may support a camera for capturing the cavity  11 . In the embodiment, the supporter  310  may support the third camera  230 . 
     The third camera  230  may include a capturing unit  231  and a camera control module  232 . The capturing unit  231  may capture images inside of the cavity  11 . The capturing unit  231  may be provided in a structure in which a plurality of lenses are arranged, and disposed so that the gaze direction faces the cavity  11 . 
     The camera control module  232  may be coupled to the capturing unit  231  and may control an operation of the capturing unit  231 . The camera control module  232  may be provided as a printed circuit board including a circuit and various elements. 
     The supporter  310  may include a body  311 , a mounting member  312 , and a support member  313 . The third camera  230  may be mounted on the body  311 . The mounting member  312  may be formed to protrude from both sides of the body  311 , and detachably mounted on the bracket  163 . 
     The support member  313  may be formed to protrude from upper and lower ends of the body  311 , and may support the supporter  310  by coming in contact with one surface of the frame. The mounting member  312  and the support member  313  may be disposed at locations that are substantially orthogonal to each other when viewed based on the body  311 . 
     The mounting member  312  may include a first piece  3121  and a second piece  3122 . The first piece  3121  may protrude from the body  311  and be elastically deformed when the mounting member  312  is detachably attached to the bracket  163 . 
     The second piece  3122  may protrude from an end of the first piece  3121  and may prevent the mounting member  312  from being separated from the bracket  163  in a state in which the mounting member  312  is fitted into the bracket  163 . 
     The bracket  163  may be formed with an insertion hole into which the mounting member  312  is inserted and fitted at locations corresponding to the first piece  3121  and the second piece  3122 . 
     The second piece  3122  may be bent from the first piece  3121 . When the supporter  310  and the third camera  230  are mounted on the bracket  163 , the first piece  3121  may be pressed by the user and thus elastically deformed so that the second piece  3122  may be fitted into the insertion hole. 
     When the supporter  310  is completely mounted on the bracket  163 , the first piece  3121  may return to its original shape and function as a stopper for preventing the supporter  310  from being separated from the insertion hole. Accordingly, the supporter  310  may be mounted on the bracket  163  without being separated from the bracket  163 . 
     When the supporter  310  is removed from the bracket  163 , the first piece  3121  may be pressed by the user and thus elastically deformed and a location of the second piece  3122  may be moved to move out of the insertion hole. Accordingly, the supporter  310  may be easily removed from the bracket  163 . 
     The support member  313  may contact one surface of the bracket  163  to support the support member  313  so that the supporter  310  is in a state of coming in close contact with the bracket  163 . The support member  313  may include a first part  3131  and a second part  3132 . 
     The first part  3131  may protrude from the body  311  and be formed at a location spaced apart from the first piece  3121 . The second part  3132  may be formed to be bent from the first part  3131 . 
     When the supporter  310  is mounted on the bracket  163 , the support member  313  may contact one surface of the bracket  163  on a portion where the first part  3131  and the second part  3132  are connected, thereby preventing the supporter  310  from shaking with respect to the bracket  163 . 
     The first part  3131  may be pressed by the bracket  163  and thus elastically deformed to bring the supporter  310  into close contact with one surface of the bracket  163 . 
     When the mounting member  312  is inserted into the insertion hole, the support member  313  may be in close contact with one surface of the bracket  163 , and the first part  3131  may be pressed by the bracket  163  in contact with the mounting member  312 . The first part  3131  may be elastically deformed by pressure to be in close contact with one surface of the bracket  163 , and at this time, a pressing force may be provided between the support member  313  and the bracket  163 , and the support member  313  and the bracket  163  may be in close contact with each other in a tighter manner by the pressing force. 
     Various external forces may be applied to the door  20  when the cooking appliance is operated. For example, at the moment when the door  20  is closed, there may be shock and vibration generated when the door  20  collides with the main body  10 . Additionally, for example, there may be shock and vibration generated by the blowing device  150  mounted inside the door  20 , a rotation device provided in the main body  10 , etc. 
     In the state in which the support member  313  and the bracket  163  are in close contact with each other in a tight manner, the supporter  310  may be prevented from shaking due to an external force. Accordingly, the third camera  230  mounted on the supporter  310  may be prevented from shaking due to an external force, thereby improving the capturing quality of the third camera  230 . 
     A camera insertion unit  314  formed to pass through the supporter  310  and having the third camera  230  inserted therein may be provided in the central portion of the supporter  310 . The bracket  163  may be provided with a through portion formed to pass through the bracket  163  and formed at a location corresponding to the camera insertion unit  314 . 
     Accordingly, the capturing unit  231  of the third camera  230  mounted on the camera insertion unit  314  may view the cavity  11  through the through portion, and capture the food placed in the cavity  11 . 
     The supporter  310  may further include a module coupling unit  315  formed to protrude from both sides of the camera insertion unit  314 , provided to surround at least a part of the capturing unit  231 , and coupled to the camera control module  232 . A pair of module coupling units  315  may be provided, and formed on both sides of the camera insertion unit  314 , respectively. 
     The module coupling unit  315  may include a fastening hole  3151  and a coupling protrusion  3152 . The coupling mechanism  1000  may be fastened to the fastening hole  3151 . At least one fastening hole  3151  may be formed in the module coupling unit  315 . 
     The coupling protrusion  3152  may be formed to protrude toward the camera control module  232 , and disposed at a location spaced apart from the fastening hole  3151 . At least one coupling protrusion  3152  may be formed in the module coupling unit  315 . 
     The camera control module  232  may include a first hole  2321  and a second hole  2322 . The first hole  2321  may be formed to protrude toward the camera control module  232 , and disposed at a location spaced apart from the fastening hole  3151 . The second hole  2322  may be provided at a location corresponding to the coupling protrusion  3152 , and the coupling protrusion  3152  may be inserted into the second hole  2322 . The first hole  2321  may be provided in a number corresponding to the fastening hole  3151 , and the second hole  2322  may be provided in a number corresponding to the coupling protrusion  3152 . 
     First, the coupling protrusion  3152  may be inserted into the second hole  2322 . Next, the coupling mechanism  1000 , such as a bolt, may be inserted into and fastened to the fastening hole  3151  of the module coupling unit  315  and the first hole  2321  of the camera control module  232 . 
     By coupling the camera module to the module coupling unit  315  using the coupling protrusion  3152  and the coupling mechanism  1000  disposed at locations spaced apart from each other, the third camera  230  including the camera module may be easily coupled to the supporter  310 . 
     In addition, this structure allows the third camera  230  to be stably mounted on the supporter  310  so as not to be rotated with respect to the supporter  310  due to external shock or vibration. 
     The supporter  310  may be provided with the mounting member  312  and the support member  313  disposed at the locations spaced apart from each other. The mounting member  312  may be provided to be easily detachable from the bracket  163  of the frame. The support member  313  can bring the supporter  310  into close contact with the bracket  163  of the frame to support the support member  313 , thereby suppressing the support member  313  from shaking due to external vibration. 
     Accordingly, the supporter  310  can be easily detached from the frame, thereby easily performing the task of mounting the third camera  230  on the frame, or during replacement or repair work. In addition, it is possible to suppress the third camera  230  from shaking due to external vibration in the state in which the third camera  230  is mounted on the frame, thereby improving the capturing quality of the third camera  230 . 
     Embodiments of the present disclosure are described with reference to the accompanying drawings. The disclosure may, however, be embodied in many different manners and should not be construed as limited to the embodiments set forth herein. It is understood that a person having ordinary skill in the art to which the present disclosure art would implement this disclosure in other specific manners without changing the technical idea or necessary features of the present disclosure. For this reason, the disclosed embodiments are intended to be illustrative in all aspects, and not restrictive.