Patent Publication Number: US-2023138482-A1

Title: Cooking appliance

Description:
CROSS-REFERENCE TO RELATED APPLICATION(S) 
     This application claims priority to and benefit of Korean Patent Application No. 10-2021-0146024 filed in Korea on Oct. 28, 2021, and 10-2022-0013988 filed in Korea on Feb. 3, 2022, which are hereby incorporated by reference as if fully set forth herein. 
     BACKGROUND 
     1. Field 
     A cooking appliance is disclosed herein. 
     2. Background 
     The content described in this section merely provides background information and does not constitute related art. 
     A cooking appliance is a home appliance that cooks food or other items (hereinafter, collectively “food”) using microwaves and/or heat from a heater, which are type(s) of electromagnetic waves. The cooking appliance may generally include a cavity, which is a space in which food is placed and cooked, and a door that opens and closes the cavity. 
     A related art cooking appliance is disclosed in Korean Patent Application Laid-Open No. 10-2008-0070408, which is hereby incorporated by reference. When the cooking appliance is installed indoors, it is necessary to consider efficient use of the cooking appliance and an installation space, for example. For this reason, the cooking appliance may be disposed at a location adjacent to a heating cooking device, for example, a heating-type oven, or a gas range, for example. More specifically, the cooking appliance may be disposed above the heating cooking device. 
     When the cooking appliance is disposed above the heating cooking device, a user may conveniently cook food by reducing his/her movement in an environment where the cooking appliance and the heating cooking device are adjacent to each other. In addition, heat and oil mist, for example, generated from the heating cooking device may 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 and oil mist, for example, 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 information 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 method. 
     In the state in which the cooking appliance is disposed above the heating cooking device, the heat and oil mist, for example, generated from the heating cooking device may penetrate into the display unit and other components mounted on the door. It is necessary to prevent the display unit and other components mounted on the door of the cooking appliance from being damaged or malfunctioning due to such heat and oil mist, for example. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       Embodiments will be described in detail with reference to the following drawings in which like reference numerals refer to like elements, and wherein: 
         FIG.  1    is a perspective view of a cooking appliance according to an embodiment; 
         FIG.  2    is a view showing a state in which a door of the cooking appliance of  FIG.  1    has been opened; 
         FIG.  3 A  is a perspective view of the door of the cooking appliance of  FIG.  1   ; 
         FIG.  3 B  is a view of the door of  FIG.  3 A  from another direction; 
         FIG.  4 A  is a rear view of the door of  FIG.  3 A ; 
         FIG.  4 B  is an exploded perspective view of a portion of the door according to an embodiment; 
         FIG.  4 C  is a view of the door of  FIG.  4 B  from another direction; 
         FIG.  5    is an exploded perspective view of the door according to an embodiment; 
         FIG.  6    is a view of the door of  FIG.  5    from another direction; 
         FIG.  7    is a side cross-sectional view of the door according to an embodiment; 
         FIG.  8    is a perspective view of an outer panel according to an embodiment; 
         FIG.  9 A  is a rear view of the outer panel of  FIG.  8   ; 
         FIG.  9 B  is a view of the outer panel of  FIG.  8    from another direction; 
         FIG.  10    is an exploded perspective view of a display unit and the outer panel according to an embodiment; 
         FIG.  11    is a view of an inner panel and an air guide according to an embodiment; 
         FIG.  12    is an exploded perspective view of the inner panel and air guide of  FIG.  11   ; 
         FIG.  13    is a view of the inner panel and air guide of  FIG.  12    from another direction; 
         FIG.  14    is an exploded perspective view of a frame and a choke according to an embodiment; 
         FIG.  15    is a view of the frame and choke of  FIG.  14    from another direction; 
         FIG.  16    is a rear view of the door according to an embodiment; 
         FIG.  17    is a cross-sectional perspective view of the cooking appliance according to an embodiment; 
         FIG.  18 A  is an enlarged view of a portion A of the cooking appliance of  FIG.  17   ; 
         FIG.  18 B  is an enlarged view of a portion B of the cooking appliance of  FIG.  17   ; and 
         FIG.  19    is a perspective view of a damper according to an embodiment. 
     
    
    
     DETAILED DESCRIPTION 
     Objects, features, and advantages will be described hereinafter with reference to the accompanying drawings, and accordingly, those skilled in the art to which embodiments pertain will be able to easily practice the technical spirit. In describing embodiments, when it is determined that description of a known technique related to the may unnecessarily obscure the gist, unnecessary description will be omitted. Hereinafter, embodiments will be described 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 and second, for example, are used to describe various components, it goes without saying 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 goes without saying that the first component may also be the second component. 
     Throughout, 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 application, 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. 
     Throughout, 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. 
     Throughout, “upward-downward direction” means the upward-downward direction of the cooking appliance in a state in which the cooking appliance is installed for daily use. “Leftward-rightward direction” means a direction perpendicular to the upward-downward direction, and the frontward-rearward direction means a direction perpendicular to both the upward-downward direction and the leftward-rightward direction. “Bilateral direction” or “lateral direction” has the same meaning as the leftward-rightward direction, and these terms may be used interchangeably in the present specification. 
       FIG.  1    is a perspective view of a cooking appliance according to an embodiment.  FIG.  2    is a view showing a state in which a door of the cooking appliance of  FIG.  1    has been opened. 
     The cooking appliance according to an embodiment may be disposed at a location spaced apart from a heating cooking device in an upward-downward direction above a location where the heating cooking device, for example, a heating-type oven or a gas range, for example, is disposed. The placement of the cooking appliance may allow a user to conveniently use cooking devices including the cooking appliance. In addition, the cooking appliance may serve 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 heat from a heater, 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 the cavity  11 . 
     Food to be cooked may be placed in 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  through which air suctioned in by a suction unit provided on a lower portion of the main body  10  is discharged 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 an entrance of the cavity  11 , and having one surface disposed to face one surface of a choke member or choke  170  when the door  20  is closed to close the cavity  11 . 
     The front panel  12  may be provided to surround the edge of the entrance of the cavity  11  and protrude with a predetermined width. Accordingly, when the door  20  is closed, an edge portion of the door  20  and the cavity  11  may overlap each other. 
     This structure may allow the front panel  12  to seal the cavity  11  in a state in which the door  20  is closed, thereby preventing oil, moisture, and oil mist, for example. 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 of the door of the cooking appliance of  FIG.  1    according to an embodiment.  FIG.  3 B  is a view of the door of  FIG.  3 A  from another direction.  FIG.  4 A  is a rear view of the door of  FIG.  3 A .  FIG.  4 B  is an exploded perspective view showing a portion of the door according to an embodiment.  FIG.  4 C  is a view of the door 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 , and the user may see an 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 may flow 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. 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 of the door  20 , including a display unit  110  mounted on the display module  21 . The air for cooling the door  20  may flow inside of 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 occupy most of the area of a front portion of the door  20 , and a placement area of the display unit  110  may be increased, thereby improving user visibility. The user may conveniently check various types of information through the display unit  110  provided with a large screen. 
     As a size of the display unit  110  is increased, an amount of heat generated may increase. Accordingly, the display unit  110  in the door  20  needs to be effectively cooled. In this embodiment, the cooling flow path unit  22 , through which cooling air flows, may be separately provided. 
     The cooling flow path unit  22  may be disposed behind the display unit  110 , 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 component 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 various heat-generating components. In order to effectively cool the display unit  110 , the entire display unit  110  may 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. 
     The air flowing through the cooling flow path unit  22  may be branched inside of the cooling flow path unit  22  to be discharged to a top and bottom of the display module  21 . The cooling air may be branched inside of the cooling flow path unit  22  and discharged to the top and bottom of the display module  21 , so that the cooling air may flow while in contact with an entire rear surface of the display unit  110  to effectively cool the display unit  110 . 
     In addition, the cooling air may be discharged to each of the top and bottom of the display module  21  to effectively form the air curtain around the display unit  110  and the door  20 , so that the heat and oil mist rising from the heating cooking device disposed below the cooking appliance may be effectively blocked by the air curtain. 
     The display module  21  may be provided with the display unit  110 , a camera, and other electronic components, and the cooling flow path unit  22  may be provided with electronic components, such as a blowing device or blower  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 components from electromagnetic waves. 
     The display unit  110  and various electronic components 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 reaching the electronic components provided in the display module  21  may be disposed behind the cooling flow path unit  22 . 
     In this embodiment, the display module  21  configured to provide various types of information and convenience to the user may be disposed on a front surface of the cooking appliance, that is, at a front of the door  20 . In addition, in this embodiment, there is a need for structure that effectively cools the components, such as the display unit  110  provided in the display module  21 , effectively cools an inside of the door  20  provided with the display unit  110 , for example, and at a same time, forms the flow path of the cooling air for forming the air curtain around the door  20 , and also protects the electronic components mounted on the door  20  from electromagnetic waves. In order to satisfy this need, 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, in order to implement the door structure according to the above-described embodiment, the display module  21 , the cooling flow path unit  22 , and the shielding unit  23  that play their own roles may be sequentially disposed on the door  20  from the front to a rear in the door  20 . In addition, the display module  21 , the cooling flow path unit  22 , and the shielding unit  23  may be stably coupled to each other to prevent the cooling air from flowing 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. 
     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 of 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 of the display module  21  may be discharged to the outside through the second outlet  124 . In other words, the air flowing inside of 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 may flow through the entire inside of the door  20  to effectively 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 a front surface of the door  20  to display videos or images. 
     The display unit  110  may display information necessary for cooking 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. 
     The display unit  110  may be connected to communicate with other home appliances, and cameras and locks, for example, provided in a 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 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 frontward-rearward direction of the door  20 . 
     The hollow  1201  of the outer panel  120  may be closed by a rear surface of the display unit  110 . Air flowing inside of 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 of 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 or fan  152  may be exposed to the hollow  1201  of the outer panel  120  to cool heat-generating components, such as a speaker  260 , a microphone  270 , a communication unit  280 , and a control board  290 . 
     As the outer panel  120  has the above-described structure, the outer panel  120  may have an interior space, and various components may be built in in the interior space. A width in the frontward-rearward direction of the door  20  may be substantially determined by the outer panel  120 . 
     A first aperture  121  into which air may flow may be formed in an upper end of the outer panel  120 . A plurality of the first aperture  121  may be provided. Each of the plurality of first apertures  121  may be provided so that a plurality of slit-shaped holes is arranged at intervals. This structure may somewhat prevent foreign substances from flowing into the door  20  through the first aperture  121 . 
     A handle  122  may be provided on one side of the outer panel  120  to be used when the user opens and closes 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, just below a location where the handle  122  is formed. The user may supply electricity to the cooking appliance or cut off the electricity supply by manipulating the button device  300 . Specific manipulation for 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 , and 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. Images captured by the camera may be reproduced on the display unit  110 , and the user may view images inside of the cavity  11  or of the lower portion of the cooking appliance through the display unit  110 . The camera may include 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 . As 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 capture a heating cooking device disposed below the cooking appliance. 
     The user may observe a state of the heating cooking device and a 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 capture the front of the cooking appliance. 
     The second camera  220  may pass through a baffle  190  and a front cover  200 , which will be described hereinafter. The user may observe a situation in front of the cooking appliance captured and recorded by the second camera  220 . 
     The second camera  220  may capture the user 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 of the front door using the display unit  110 . 
     The third camera  230  may be mounted on a frame  160  described hereinafter, may be disposed to face the cavity  11 , and may capture an image of the cavity  11 . In other words, the third camera  230  may face the cavity  11  to capture a situation within the cavity  11 . The user may observe a situation in which food is cooked in the cavity  11  through the image captured by the third camera  230 . 
     The door  20  may include a human detection unit or human detector  240  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 , and configured to detect a presence of the user in front of the cooking appliance. The human detector  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 detector  240 . 
     When there is a user, for example, the control unit may operate the display unit  110  to activate 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  immediately. 
       FIG.  5    is an exploded perspective view of the door according to an embodiment.  FIG.  6    is a view of the door of  FIG.  5    from another direction. 
     The cooling flow path unit  22  may include an inner panel  130 , an air guide  140 , and the blower  150 . The inner panel  130  may be disposed behind the outer panel  120  and mounted on the outer panel  120 . The air guide  140  described hereinafter 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 blower  150  may be mounted on the air guide  140 . The blower  150  may forcibly blow the air flowing into the air guide  140  from a rear to a front of the air guide  140 . 
     The shielding unit  23  may include the frame  160  and the choke  170 . The frame  160  may be disposed behind the inner panel  130 , may be coupled to the inner panel  130 , and may have one side rotatably coupled to the main body  10 . 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, and at the same time, may form an inner surface of the door  20  with a shielding structure that prevents leakage of electromagnetic waves, that is, the choke  170 . 
     The choke  170  may be disposed behind the frame  160 , may be coupled to the frame  160 , and may block electromagnetic waves generated in the main body  10  from being discharged to the outside. The choke  170  may be generally provided in a quadrangular shape having a hollow, for example, and may surround an edge portion of the frame  160 . 
     The display module  21  may include the baffle  190  and the front cover  200 . The baffle  190  may be disposed in front of the display unit  110 , may surround an 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  may be generally formed in, for example, 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 . The front cover  200  may be disposed in front of the baffle  190 , and surround an edge of the baffle  190 . The front cover  200  may be generally formed in a quadrangular shape having a hollow, for example, and may serve to stably couple the display unit  110  and the baffle  190  to the outer panel  120 . 
       FIG.  7    is a side cross-sectional view of the door according to an embodiment.  FIG.  8    is a perspective view of the outer panel according to an embodiment.  FIG.  9 A  is a rear view of the outer panel according to an embodiment.  FIG.  9 B  is a view of the outer panel of  FIG.  8    from another direction.  FIG.  10    is an exploded perspective view of the display unit and the outer panel according to an embodiment.  FIG.  11    is a view showing the inner panel and the air guide according to an embodiment. 
     Referring to  FIG.  10   , the outer panel  120  may include the speaker  260 , the microphone  270 , and the communication unit  280 . At least one speaker  260  may be mounted on a side of the outer panel  120 . The speaker  260  may generate a voice, or an alarm sound, for example, necessary for operating the cooking appliance. In addition, the speaker  260  may generate all voices or alarm sounds, for example, for the door  20  including the display unit  110  of the door  20  to serve as an Internet of Things hub. 
     The microphone  270  may be mounted at a 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 be a component of the door  20  serving 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 . As the door  20  serves 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. 
     Accordingly, a plurality of the communication unit  280  may be provided 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. 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, for example. 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. 
     The control board  290  that controls 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 protrude from an inner wall of the outer panel  120 , a portion 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 . As a pair of speakers  260  is 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 pass through a 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 a side of the outer panel  120 . The first through hole  120   c  may be provided adjacent to a location at which 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 prevent 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. As a pair of speakers  260  is 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 portion of the button device  300  mounted inside of 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 an 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 a 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 an 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 a shape and size of each of the plurality of communication units  280 . 
     The fitting projection  120   f  may protrude from the inner wall of the outer panel  120 . A plurality of fitting projections  120   f  may be provided and spaced apart from each other. The control board  290  may be fitted into the fitting projections  120   f . For example, the fitting projection  120   f  may be disposed at a location adjacent to an edge of the plate-shaped control board  290 . 
     Accordingly, the control board  290  may have corners fitted into 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  may be fitted thereto. 
     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 blown by the blower  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 blown by the blower  150  may be discharged to the outside. 
     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 . At this time, holes for discharging air may 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 blown inside the door  20  by the blower  150  may be discharged to the outside at locations adjacent to 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 the air curtain on the upper portion of the door  20 . In addition, the air discharged through the second outlet  124  may form the air curtain on the lower portion of the door  20 . 
     The term “air curtain” refers to means for blocking permeation of an external airflow into the door  20 . In this 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 prevent permeation of external air into the door  20 . As the heating cooking device is disposed below the cooking appliance, heat generated when the heating cooking device is used and oil mist generated from 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 components of the door  20  provided in the cooking appliance. In particular, components in which the display unit  110  and circuits and elements, for example, 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 image quality of the display unit  110 , and attached to the surfaces of other components mounted on the door  20  to damage these components. 
     In this 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 may be effectively blocked by the air curtain. Accordingly, it is possible to effectively prevent various electronic components 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 an inlet  141  and a mounting hole  142 . The inlet  141  may be disposed on an upper portion of the air guide  140 , external air may be introduced through the inlet  141 , and at least one inlet  141  may be provided. 
     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 , and the blower  150  may be mounted therein. The mounting hole  142  may pass through the air guide  140  in the frontward-rearward 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 blower  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 blow air from the rear to the front of the air guide  140 . The blowing fan  152  may receive electricity and rotate to blow air inside of the door  20 . 
     By 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 a middle of the casing  151  and correspond to a location, area, and shape of the hollow in which the blowing fan  152  is disposed. 
     Hereinafter, the airflow inside of the door  20  will be described 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 blown by the blowing fan  152  may specifically have the following flow path. 
     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 frontward-rearward 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 . A flow direction of the air in the blowing fan  152  may be changed from the upward-downward direction of the door  20  to the frontward-rearward direction thereof. 
     As a 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 upward-downward direction in front of the air guide  140 . A first portion of the branched air may flow upward from the door  20  and may be discharged through the first outlet  123 . A second portion 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 a front surface of the door  20 . This structure may allow the air discharged from the first outlet  123  and the second outlet  124  to form the air curtain on the door  20 , thereby effectively preventing heat and oil mist generated from the heating cooking device disposed below the cooking appliance from permeating into the door  20 . 
     At least a portion of the air discharged from the first outlet  123  may come into contact with 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 of the door  20  may allow 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 of the door  20  may cool the entire rear surface of the display unit  110 , and effectively cool the outer panel  120  and other components mounted on other portions of the door  20 . In particular, the outer panel  120  may be provided with components that generate heat, such as the speaker  260 , the microphone  270 , the communication unit  280 , and the control board  290 . These heat-generating components may be disposed over the entire outer panel  120 . Accordingly, the air may flow through the entire inside of the outer panel  120 , thereby effectively cooling these heat-generating components. 
     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 blower  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 blower  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 this embodiment, the air flowing inside of the door  20  may cool the entire front surface of the display unit  110  while being discharged through the first outlet  123 . In addition, the air flowing inside of the door  20  may effectively cool the heat-generating components mounted on the rear surface of the display unit  110  and inside of the door  20 . 
       FIG.  12    is an exploded perspective view of the inner panel and air guide of  FIG.  11   .  FIG.  13    is a view of the inner panel and air guide of  FIG.  12    from another direction.  FIG.  14    is an exploded perspective view of a frame and choke according to an embodiment.  FIG.  15    is a view of the frame and choke of  FIG.  14    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 . As 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 through which the air cooling the inside of the door  20  may flow. 
     The door  20  may include a latch  250  mounted on a side of the frame  160 , a portion of which protrudes from the frame  160 . The latch  250  may be formed in a structure that is caught in a groove formed in the front panel  12  of the door  20 . The latch  250  may stably maintain a state in which the door  20  is closed. 
     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 blower  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 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 easily introduced into the air guide  140 . 
     The lower portion  140   b  of the air guide  140  may have a smaller cross-sectional area than that of the upper portion  140   a , but as 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  may 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  160  by the hollow  130   a  of the inner panel  130 . 
     Thus, the upper portion  140   a  and the lower portion  140   b  of the air guide  140  may have a 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  may be sufficiently wide, and air may be smoothly introduced from the outside and may also smoothly pass through the blower  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 blower  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 blower  150  may pass through the hollow  1201  of the outer panel  120  and come into contact with the display unit  110  to cool the display unit  110 . 
     The above-described structure may allow the door  20  to have a slim overall structure and increase a flow rate of air flowing therein, thereby improving cooling efficiency of the door  20 . 
     Referring to  FIGS.  14  and  15   , the frame  160  may include a sink unit or sink  161  formed on an edge to trap and dissipate electromagnetic waves. The sink  161  may be covered by the choke  170 . Accordingly, the choke  170  may include an accommodating groove  171  provided to cover at least a portion of the sink  161 . 
     The sink  161  may include a plurality of protrusions  1611  and a plurality of recesses  1612  alternately arranged along the edge of the frame  160 . The plurality of protrusions  1611  and the plurality of recesses  1612  may be covered by the choke  170 . The electromagnetic waves propagating from the cavity  11  may be collected in the sink  161  having a structure in which the plurality of protrusions  1611  and the plurality of recesses  1612  are alternately arranged, and the electromagnetic waves may be blocked from being propagated to the outside by the choke  170  and dissipated in the sink  161 . 
     The accommodating groove  171  formed in the choke  170  may completely cover the sink  161  to prevent the electromagnetic waves collected in the sink  161  from escaping to the outside of the sink  161 . Accordingly, the accommodating groove  171  may be formed by bending outer and inner portions of the choke  170  toward the sink  161 , and provided so that a longitudinal direction is parallel to a direction in which the plurality of protrusions  1611  and the plurality of recesses  1612  are arranged. 
     This structure may allow the choke  170  to completely cover the sink  161 , thereby preventing electromagnetic waves collected in the sink  161  from escaping to the outside of the sink  161 . In this embodiment, it is possible to effectively prevent electromagnetic waves generated in the cavity  11  from propagating to the outside of the main body  10  by the sink  161  provided in the frame  160  and the choke  170  provided to cover the sink  161 . Accordingly, it is possible to prevent user exposure to harmful electromagnetic waves, and to effectively prevent noise from being generated in the electronic components including the display unit  110  mounted on the door  20  disposed in front of the main body  10  by the electromagnetic waves. 
       FIG.  16    is a rear view of the door according to an embodiment. The door  20  may further include at least one damper  180  mounted on the choke  170 , and having one end exposed toward the main body  10 . 
     The damper  180  may be disposed on the side of the choke  170 . A plurality of the damper  180  may be provided, and a number thereof may be appropriately selected. The damper  180  may prevent the door  20  from colliding with the main body  10  to generate noise or to cause damage to the cooking appliance when the door  20  is opened and closed. 
     The damper  180  may be provided to come into contact with one surface of the front panel  12  when the door  20  is closed. The damper  180  may be made of a relatively flexible material to buffer shock occurring when the door  20  collides with the main body  10 . 
     At the moment the door  20  is closed, the damper  180  may collide with the front panel  12 . At this time, the damper  180  may be elastically deformed at the same time as it collides with the front panel  12  to buffer the shock, and thereafter, one surface of the door  20  and one surface of the main body  10  may come into contact with each other. Accordingly, the damper  180  may buffer the shock between the main body  10  and the door  20  occurring at the moment the door  20  is closed. In this embodiment, the damper  180  provided in the door  20  may buffer the shock between the main body  10  and the door  20  occurring at the moment the door  20  is closed, thereby effectively alleviating generation of noise and occurrence of damage to the cooking appliance due to repeated opening and closing of the door  20 . 
       FIG.  17    is a cross-sectional perspective view of the cooking appliance according to an embodiment.  FIG.  18 A  is an enlarged view of a portion A of the cooking appliance of  FIG.  17   .  FIG.  18 B  is an enlarged view of a portion B of the cooking appliance of  FIG.  17   .  FIG.  19    is a perspective view of the damper according to an embodiment. 
     The choke  170  may include a first seating groove  172  and a first through hole  173 . The first seating groove  172  may be formed by recessing one surface of the choke  170 , and one side of the damper  180  may be seated to be exposed toward the front panel  12 . 
     The first through hole  173  may be formed inside of the first seating groove  172 , may have a portion of the choke  170  formed to protrude therefrom, may have a portion of the choke  170  inserted thereinto, and may have a diameter shorter than a diameter of the first seating groove  172 . As the damper  180  is made of a flexible material that is easy to elastically deform, the damper  180  may be elastically deformed and easily mounted in the first through hole  173  and the first seating groove  172  when an operator inserts and pressurizes the damper  180  into the first through hole  173 . 
     In addition, the damper  180  may be provided in a shape that is stably mounted in the first seating groove  172  and the first through hole  173  of the choke  170 . For example, the damper  180  may be formed to include a first cell  181 , a second cell  182 , a third cell  183 , and a fourth cell  184 . 
     The first cell  181  may be seated in the first seating groove  172  and may come into contact with one surface of the front panel  12  when the door  20  is closed. The first cell  181  may be exposed to the choke  170  and may have one surface colliding with and coming into contact with the front panel  12  and thus being elastically deformed, thereby buffering the shock between the door  20  and the main body  10 . 
     When a width of the first cell  181 , that is, a length in a direction perpendicular to a diameter direction of the first cell  181 , is too small, a buffering ability of the damper  180  may be reduced. Conversely, when the width of the first cell  181  is too large, the door  20  and the main body  10  may not come into close contact with each other in a state in which the door  20  is closed. Accordingly, it is appropriate to select the width of the first cell  181  in consideration of the above. 
     The second cell  182  may protrude from the first cell  181 , may be inserted into the first through hole  173 , and may be formed to have a diameter shorter than that of the first cell  181 . It is appropriate that a tolerance between the diameter of the first cell  181  and the first through hole  173  is properly designed so that the first cell  181  is tightly fitted into the first through hole  173 . 
     The third cell  183  may protrude from the second cell  182 , may be formed to have a diameter wider than that of the second cell  182  at a boundary point with the second cell  182 , and may have a gradually reduced diameter in a direction away from the second cell  182 . The fourth cell  184  may protrude from the third cell  183 . Due to this structure of the third cell  183 , when the damper  180  is pushed into the first through hole  173 , the third cell  183  may be elastically deformed and at the same time, an inclined side surface of the third cell  183  may be slid from the side surface of the first through hole  173 , so that the damper  180  may be inserted into the first through hole  173 . 
     When the damper  180  is mounted on the choke  170 , an upper surface of the third cell  183  may come into contact with one surface of the choke  170 , thereby preventing the damper  180  from being separated from the first through hole  173 . Due to this structure, the damper  180  mounted on the choke  170  may not be separated from the choke  170  and a state of being mounted on the choke  170  may be stably maintained even when the damper  180  receives repeated shocks due to the repeated opening and closing of the door  20 . 
     Embodiments disclosed herein provide a cooking appliance having a display unit provided on a front surface in order to provide various types of information to the user. Embodiments disclosed herein further provide a cooking appliance having a display unit provided on a door of the cooking appliance using microwaves. Embodiments disclosed herein furthermore provide a cooking appliance having a structure capable of preventing heat and oil mist, for example, generated from a heating cooking device disposed thereunder from penetrating into a door. 
     Embodiments disclosed herein provide a cooking appliance having a structure capable of preventing a display unit from being contaminated by oil mist. Embodiments disclosed herein also provide a cooking appliance having a cooling structure of a display module attached to a front surface of a door. Embodiments disclosed herein provide a cooking appliance having a structure capable of preventing heat and oil mist, for example, from penetrating into a door by forming an air curtain outside of the door. 
     Embodiments disclosed herein provide 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. In addition, embodiments disclosed herein provide a cooking appliance having a structure capable of buffering a shock generated between a door and a main body when the door is opened and closed. 
     Advantages are not limited to the above-described advantages, and other advantages not mentioned may be understood from the description, and will be more clearly understood from the embodiments. In addition, it will be easily seen that advantages may be realized by the means described in the claims and combinations thereof. 
     A cooking appliance according to embodiments disclosed herein may include a main body formed with a cavity, and a door that opens and closes the cavity. The door may include a display module disposed in front of the door, a cooling flow path unit behind the display module, and having a flow path through which air for cooling flows formed therein, and a shielding unit disposed behind the cooling flow path unit and configured to shield electromagnetic waves generated from the main body. The cooling flow path unit is disposed between the shielding unit and the display module. 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 a top and bottom of the display module. 
     The door may include a display unit configured to display videos or images, an outer panel disposed behind the display unit and on which the display unit is mounted, an inner panel disposed behind the outer panel and mounted on the outer panel, an air guide disposed between the outer panel and the inner panel and coupled to the inner panel, and a blowing device or blower mounted on the air guide. The door may include a first outlet disposed on an upper portion of the door, and through which the air blown by the blowing device may be discharged to the outside, and a second outlet disposed on a lower portion of the door, and through which the air blown by the blowing device may be discharged to the outside. 
     The air guide may include at least one inlet disposed on an upper portion, and through which external air may be introduced, and a mounting hole formed under the inlet, and in which the blowing device may be mounted. The blowing device may include a casing disposed in the mounting hole, and a blowing fan rotatably mounted in the casing and blowing air from a rear to a front of the air guide. 
     As the blowing fan rotates, 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 blown by the blowing fan may specifically have the following flow path. 
     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 downward from the door to flow into the blowing fan. 
     The air may pass through the blowing fan in a frontward-rearward 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. A flow direction of the air may be changed from an upward-downward direction to a frontward-rearward direction of the door in the blowing fan. 
     As a 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 upward-downward direction. A part or first portion of the branched air may flow in an upper direction of the door to be discharged through the first outlet. The other part or a second portion of the branched air may flow in a downward direction of the door to be discharged through the second outlet. The cooling flow path unit may be configured to guide air introduced at an upper surface of the door towards a rear surface of the display module, such that the air may flow in an upward and a downward direction along the rear surface of the display module for cooling the same before being discharged to an outside of the door. 
     The door may further include a frame disposed behind the inner panel, coupled to the inner panel, and having one side rotatably coupled to the main body, and a choke member or choke disposed behind the frame, coupled to the frame, and configured to block electromagnetic waves generated from the main body from being discharged to the outside. The may be coupled to a rear surface of the cooling flow path unit. The frame may include a sink unit or sink formed on an edge to trap and dissipate the electromagnetic waves. 
     The choke member may include an accommodating groove provided to cover at least a part or portion of the sink unit. The sink unit may be provided so that a plurality of protrusions and a plurality of recesses are alternately arranged along an edge of the frame. The accommodating groove may be formed by bending outer and inner portions of the choke member toward the sink unit, and provided so that a longitudinal direction is parallel to a direction in which the protrusions and the recesses are arranged. 
     The door may further include at least one damper mounted on the shielding unit or the choke member, and having one side provided to be exposed toward the main body. 
     The main body may further include a front panel provided on an edge of an entrance of the cavity, and having one surface disposed to face one surface of the shielding unit or the choke member when the door is closed to close the cavity. The damper may be provided to come into contact with one surface of the front panel when the door is closed. 
     The choke member may include a first seating groove configured to seat one side of the damper to be exposed toward the front panel, and a first through hole formed inside of the first seating groove, formed so that a part or portion of the choke member protrudes, having a part or portion of the choke member inserted thereinto, and formed to have a diameter shorter than that of the first seating groove. 
     The damper may include a first cell seated in the first seating groove and coming into contact with one surface of the front panel when the door is closed, a second cell that protrudes from the first cell, inserted into the first through hole, and formed to have a diameter smaller than that of the first cell, a third cell that protrudes from the second cell, formed to have a diameter longer than that of the second cell at a boundary point with the second cell, and having a gradually reduced diameter in a direction away from the second cell, and a fourth cell that protrudes from the third cell. 
     The door may further include a baffle that is disposed in front of the display unit, surrounds an edge of the display unit, and coupled to the outer panel to mount the display unit on the outer panel, and a front cover that is disposed in front of the baffle, and surrounds an edge of the baffle. The door may further include a first camera mounted on the lower portion of the outer panel to capture a state of a lower portion of the door, a second camera disposed on an upper portion of the door, mounted by passing through the baffle and the front cover, and capturing an image of a front of the door, and a third camera mounted on the frame, disposed to face the cavity, and capturing an image of the cavity. 
     In the cooking appliance according to embodiments disclosed herein, as the display module is provided at the front of the door, the user may know a cooking situation in the cooking appliance through the display module. The display module may serve as a hub of another home appliance to provide various types of information to the user, thereby enhancing user convenience. 
     Further, in the cooking appliance according to embodiments disclosed herein, the airflow discharged to the outside of the door through the first outlet and the second outlet provided in the door may form an air curtain, so that heat and oil mist rising from a heating cooking device disposed below the cooking appliance may be effectively blocked by the air curtain. Accordingly, it is possible to effectively prevent various electronic components including the display unit provided on the door from being damaged or degraded by the heat and the oil mist. In addition, it is possible to prevent the display unit from being contaminated by the heat and the oil mist and thus giving inconvenience to the user. 
     Furthermore, in the cooking appliance according to embodiments disclosed herein, the air flowing inside of the door may be discharged through the first outlet to cool the entire front surface of the display unit. In addition, the air flowing inside of the door may effectively cool the heat-generating components mounted on the rear surface of the display unit and inside of the door. 
     In addition, in the cooking appliance according to embodiments disclosed herein, a door having all of the display structure, the cooling structure, and the shielding structure of the electromagnetic waves may be formed. The display structure, the cooling structure, and the shielding structure may be coupled to one another to slimly form the door as a whole. Accordingly, it is possible to prevent a thickness of the door from being increased even when all of the display structure, the cooling structure, and the shielding structure are formed on the door. 
     Also, in the cooking appliance according to embodiments disclosed herein, it is possible to effectively prevent electromagnetic waves generated in the cavity from propagating to the outside of the main body by the sink provided on the frame and the choke provided to cover the sink. Accordingly, it is possible to prevent user exposure to harmful electromagnetic waves, and effectively prevent noise from being generated by the electromagnetic waves in the electronic components including the display unit mounted on the door disposed on the front of the main body. 
     In the cooking appliance according to embodiments disclosed herein, the damper provided on the door may buffer shock between the main body and the door occurring at a moment the door is closed, thereby effectively alleviating generation of noise and the occurrence of damage to the cooking appliance due to repeated opening and closing of the door. 
     Embodiments have been described with reference to the exemplary drawings, but it is apparent that the embodiments are not limited by the embodiments and drawings disclosed in this specification, and various modifications may be possible by those skilled in the art without departing from the technical spirit. In addition, although operations and effects according to the configuration have not been explicitly disclosed and described while describing the embodiments, it goes without saying that the predictable effect by the corresponding configuration should also be recognized. 
     It will be understood that when an element or layer is referred to as being “on” another element or layer, the element or layer can be directly on another element or layer or intervening elements or layers. In contrast, when an element is referred to as being “directly on” another element or layer, there are no intervening elements or layers present. As used herein, the term “and/or” includes any and all combinations of one or more of the associated listed items. 
     It will be understood that, although the terms first, second, third, etc., may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer or section from another region, layer or section. Thus, a first element, component, region, layer or section could be termed a second element, component, region, layer or section without departing from the teachings of the present invention. 
     Spatially relative terms, such as “lower” and “upper”, for example, may be used herein for ease of description to describe the relationship of one element or feature to another element(s) or feature(s) as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation, in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as “lower” relative to other elements or features would then be oriented “upper” relative to the other elements or features. Thus, the exemplary term “lower” can encompass both an orientation of above and below. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly. 
     The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the singular forms “a”, “an” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms “comprises” and/or “comprising,” when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. 
     Embodiments are described herein with reference to cross-section illustrations that are schematic illustrations of idealized embodiments (and intermediate structures). As such, variations from the shapes of the illustrations as a result, for example, of manufacturing techniques and/or tolerances, are to be expected. Thus, embodiments should not be construed as limited to the particular shapes of regions illustrated herein but are to include deviations in shapes that result, for example, from manufacturing. 
     Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein. 
     Any reference in this specification to “one embodiment,” “an embodiment,” “example embodiment,” etc., means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the invention. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment. Further, when a particular feature, structure, or characteristic is described in connection with any embodiment, it is submitted that it is within the purview of one skilled in the art to effect such feature, structure, or characteristic in connection with other ones of the embodiments. 
     Although embodiments have been described with reference to a number of illustrative embodiments thereof, it should be understood that numerous other modifications and embodiments can be devised by those skilled in the art that will fall within the spirit and scope of the principles of this disclosure. More particularly, various variations and modifications are possible in the component parts and/or arrangements of the subject combination arrangement within the scope of the disclosure, the drawings and the appended claims. In addition to variations and modifications in the component parts and/or arrangements, alternative uses will also be apparent to those skilled in the art.