Patent Publication Number: US-9897323-B2

Title: Gas oven

Description:
CROSS-REFERENCE TO RELATED PATENT APPLICATIONS 
     This application is a U.S. National Stage Application under 35 U.S.C. § 371 of PCT Application No. PCT/KR2011/000935, filed Feb. 11, 2011. 
     TECHNICAL FIELD 
     The present invention relates to a cooker, and more particularly, to a gas oven for cooking foods by using a radiant burner. 
     BACKGROUND ART 
     Cookers are home appliances for cooking foods by using gas or electricity. A gas oven of the cookers includes a gas burner. In general, a gas oven includes a cavity having an oven chamber for cooking foods and a burner providing heat for cooking the foods into the oven chamber. 
     For example, a broil burner is disposed at an upper portion of the oven chamber, and a bake burner is disposed at a lower portion of the oven chamber. The broil burner burns a mixed gas that is mixed with air to substantially generate flame. Also, the foods within the oven chamber are heated and cooked by the flame. 
     The gas oven according to the related art has following problems. 
     First, in the related art, the mixed gas discharged through a flame hole of the broil burner is burned to generate flame. Thus, since flame is not substantially generated at a portion in which the flame hole is not defined, the foods may not be uniformly cooked. 
     Also, in the related art, the burner is fixed to the cavity by welding or a coupling member that is coupled in a vertical direction. Thus, it may be difficult to fix or separate the burner. 
     DISCLOSURE OF THE INVENTION 
     Technical Problem 
     To solve the above-described problems, an object of the present invention provides a gas oven that can more efficiently heat foods. 
     Another object of the present invention provides a gas oven that can more safely heat foods. 
     Further another object of the present invention provides a gas oven that can more easily fix or separate a burner. 
     Technical Solution 
     Therefore, it is an aspect of the present invention to provide a gas oven including: a cavity in which an oven chamber having an opened front surface is defined; a heating source installed in the cavity though the opened front surface of the oven chamber, the heating source providing energy for cooking foods in the oven chamber; a bracket fixing the heating source to the cavity; and a coupling member fixing the bracket to the cavity, wherein the heating source is horizontally moved into the oven chamber in a state where the heating source is fixed to the bracket and is fixed to the cavity by the coupling member. 
     Another aspect of the present invention provides a gas oven including: a cavity in which an oven chamber having an opened front surface is defined; a radiant burner horizontally moved into the oven chamber through the opened front surface of the oven chamber, the radiant burner being fixed to the cavity so that the radiant is disposed in an upper portion of the oven chamber; a burner bracket to which the radiant burner is fixed; a first coupling member temporarily fixing the burner bracket to the cavity; and a second coupling member the burner bracket temporarily fixed to the cavity by the first coupling member to the cavity. 
     Advantageous Effects 
     As described above, the gas oven according to the present invention may expect following effects. 
     First, according to the present invention, the foods within the oven chamber are cooked by using the radiant burner as an upper burner. Thus, when compared to the broil burner used as the upper burner in the related art, the foods may be relatively effectively cooked. 
     Also, according to the present invention, when the temperature of the inside of the radiant burner is detected, and then the detected temperature exceeds the preset safety temperature, the supply of the gas into the radiant burner may be interrupted. Thus, it may prevent the gas from being burned within the radiant burner except for the surface of the combustion mat to more safely cook the foods. 
     Also, according to the present invention, the burner is moved horizontally through the oven chamber and then is fixed to the cavity. Thus, according to the present invention, the process for fixing the burner to the cavity or separating the burner from the cavity may be more easily performed. 
     In addition, according to the present invention, the mixed gas may be uniformly and generally burned on the bottom surface of the radiant burner, i.e., the entire surface of the combustion mat. Thus, the foods within the oven chamber may be uniformly cooked. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a perspective view of a gas oven according to a first embodiment of the present invention. 
         FIG. 2  is a cross-sectional view of a main part according to the first embodiment of the present invention. 
         FIGS. 3 and 4  are views illustrating a process of fixing a burner to the gas oven according to the first embodiment of the present invention. 
         FIG. 5  is an exploded perspective view of a gas oven according to a second embodiment of the present invention. 
         FIG. 6  is a cross-sectional view of a main part according to a third embodiment of the present invention. 
         FIG. 7  is a schematic view of a gas oven according to a fourth embodiment of the present invention. 
         FIG. 8  is a cross-sectional view of a main part according to a fifth embodiment of the present invention. 
         FIG. 9  is a cross-sectional view illustrating a flow of a mixed gas in a radiant burner according to the fifth embodiment of the present invention. 
         FIG. 10  is a cross-sectional view of a main part of a gas oven according to a sixth embodiment of the present invention. 
     
    
    
     MODE FOR CARRYING OUT THE INVENTION 
     Hereinafter, a gas oven according to a first embodiment of the present invention will be described in detail with reference to the accompanying drawings. 
       FIG. 1  is a perspective view of a gas oven according to a first embodiment of the present invention, and  FIG. 2  is a cross-sectional view of a main part according to the first embodiment of the present invention. 
     First, referring to  FIG. 1 , a main body  100  defines an outer appearance of a gas oven  10  according to the present invention. Also, the main body  100  includes a top burner unit  200 , first and second oven units  300  and  400 , a back guard  510 , a control panel  520 , and a top burner control unit  530 . 
     The top burner unit  200  and the first and second oven units  300  and  400  provide a space in which foods are cooked. The back guard  510  guides a combustion gas generated while the foods are cooked in the oven unit  300 . Also, the control panel  520  receives a manipulation signal for operating the gas oven  10  and displays various information related to the operation of the gas oven  10  to the outside. The top burner control unit  530  includes a manipulation knob  531  for opening or closing a valve through which a gas is supplied into the top burner unit  200 . 
     In more detail, the top burner unit  200  is disposed on an upper end of the main body  100 . A top plate  210  defines a top surface of the top burner unit  200 . 
     Also, a plurality of top burners  200  are provided in the top burner unit  200 . The top burner  220  burns the gas to heat a container in which the foods are contained. Although total five top burners  220  are provided on a top surface of the top plate in the current embodiment, the present invention is not limited to the number of top burners  220 . 
     Also, a plurality of top grates  230  are disposed on the top burner unit  200 . The container to be heated by the top burner  220  is seated on each of the top grates  230 . 
     The first oven unit  300  is disposed on a central portion of the main body  100  corresponding to a lower side of the top burner unit  200 . A first oven cavity  310  is provided in the first oven unit  300 . A first oven chamber  311  in which the foods are cooked is provided in the first oven cavity  310 . Also, the first oven chamber  311  is selectively opened or closed by a first oven door  320 . An upper end of the first oven door  320  is vertically rotated with respect to a lower end of the main body  100  to selectively open or close the oven chamber. 
     Referring to  FIG. 2 , the first oven chamber  311  has an opened front surface. The foods are taken in or out of the first oven chamber  311  through the opened front surface of the first oven chamber  311 . 
     A coupling hole  313  is defined in a front surface of the first oven cavity  310 . A radiant burner  330  that will be described later is fixed through the coupling hole  313 . A coupling member S is coupled to the coupling hole  313 . The coupling hole  313  is defined in an upper end of a front surface of the first oven cavity  310  corresponding to an upper portion of a front surface of the first oven chamber  311 . 
     Also, at least one coupling slot  315  is defined in a rear surface of the first oven cavity  310 . Like the coupling hole  313 , the radiant burner  330  may also be fixed through the coupling slot  315 . The coupling slot  315  is defined by cutting a portion of the rear surface of the first oven cavity  310 . The number of coupling slot  315  is determined to correspond to the number of coupling hook  349 A that will be described later. Also, the coupling slot  315  may be set to a value relatively greater than a thickness of the coupling hook  394 A. 
     Also, a tube through hole  317  is defined in the rear surface of the first oven cavity  310 . The tube through hole  317  is defined by cutting a portion of the rear surface of the first oven cavity  310  in a shape corresponding to that of a sectional surface of a mixing tube  335  that will be described later. The number of tube through hole  317  is determined to corresponding to the number of mixing tube  335 . 
     The radiant burner  330  is disposed in the first oven cavity  310 . The radiant burner  330  is disposed in an upper portion of the first oven chamber  311 . The radiant burner  330  provides radiant heat for cooking the foods within the first oven chamber  311 . Also, in the current embodiment, the radiant burner  330  is fixed to the inside of the first oven cavity  310  so that the radiant burner  330  is disposed inside the first oven chamber  311  through the opened front surface of the first oven chamber  311 . Referring to  FIG. 2 , the radiant burner  330  includes a burner pot  331 , a combustion mat  333 , and the mixing tube  335 . 
     The burner pot  331  has a polyhedral shape with an opened bottom surface. Also, a mixed gas is substantially supplied into the burner pot  331 . Also, a gas supply hole  331 A is defined in a rear surface of the burner pot  331 . The gas supply hole  331 A serves as an inlet through which air flowing into the burner pot  331  is suctioned. 
     The combustion mat  333  is disposed on the opened bottom surface of the burner pot  331 . Substantially, the mixed gas supplied into the burner pot  331  is burned on the combustion mat  333 . In more detail, the mixed gas supplied into the burner pot  331  is surface-burned on a surface of the combustion mat  333 , i.e., the bottom surface of the combustion mat  333 . For this, the combustion mat  333  may be formed of a porous material so that the mixed gas supplied into the burner pot  331  passes through the combustion mat  333 . 
     The mixing tube  335  generates the mixed gas to be supplied into the burner pot  331 . That is to say, the mixing tube  335  may mix a gas with air to supply the mixed gas into the burner pot  331 . For this, the mixing tube  335  has an end connected to the burner pot  331 , substantially, the gas supply hole  331 A. Also, the mixing tube  335  has the other end passing through the tube through hole  317  to extend to the outside of the first oven chamber  311  in a state where the radiant burner  330  is installed within the first oven chamber  311 . 
     Also, although not shown, the other heating source may be provided inside the first oven chamber  311 . For example, a bake burner may be installed in a lower portion of the first oven chamber  311 , and a convection device may be installed on a rear surface of the first oven chamber  311 . 
     In the current embodiment, the radiant burner  330  is fixed to the inside of the first oven cavity  310  in a state where the radiant burner  330  is disposed inside the first oven chamber  311  by a burner bracket  340 . Referring to  FIGS. 1 and 2 , the burner bracket  340  includes a burner support part  341 , a front fixing part  343 , and a rear fixing part  347 . 
     The burner support part  341  has an approximate plate shape corresponding to that of the sectional area of the radiant burner  330 . The burner support part  341  supports the radiant burner  330 . Substantially, the bottom surface of the radiant burner  330  may be closely attached and fixed to a top surface of the burner support part  341 . The burner support part  341  and the radiant burner  330  may be fixed to each other through various methods, for example, by welding or a coupling member. 
     Also, a heat transfer opening  341 A is defined in the burner support part  341 . The heat transfer opening  341 A is defined by cutting a portion of the burner support part  341 . Here, a shape and size of the heat transfer opening  341 A may be determined to correspond to those of the combustion mat  333  exposed to the bottom surface of the radiant burner  330 . 
     The front fixing part  343  extends forward from a front end of the burner support part  341 . The front fixing part  343  includes an inclined extension part  344 , a front attachment part  345 , and an upper attachment part  346 . 
     The inclined extension part  344  inclinedly extends at a preset angle upward from the front end of the burner support part  341 . This is done for disposing the front fixing part  343  at a height at which the front fixing part  343  is fixed to the top surface of the first oven cavity  310  corresponding to the front surface of the first oven cavity  310  and a ceiling surface of the first oven chamber  311  in consideration of a thickness of the radiant burner  330 . 
     Also, the front attachment part  345  is disposed on a front end of the inclined extension part  344 . The front attachment part  345  is bent from the front end of the inclined extension part  344  in a vertical direction. The front attachment part  345  is closely attached to an upper end of a front surface of the first oven cavity  310 . 
     Also, a plurality of through holes  345 A are defined in the front attachment part  345 . Each of the through holes  345 A is defined by cutting a portion of the front attachment part  345  to communicate with the coupling hole  313  in front and rear directions. Thus, the coupling member S passing through the through hole  345 A is coupled to the coupling hole  313 . 
     The upper attachment part  346  is disposed between the inclined extension part  344  and the front attachment part  345 . That is, the upper attachment part  346  may substantially connect the inclined extension part  344  to the front attachment part  345 . Here, the upper attachment part  346  extends horizontally toward a rear end of the front attachment part  345  from a front end of the inclined extension part  344 . Also, the upper attachment part  346  is closely attached to the top surface of the first oven cavity  310 . 
     Also, the rear fixing part  347  extends backward from a rear end of the burner support part  341 . The rear fixing part  347  temporarily fixes the radiant burner  330  to a predetermined position within the first oven chamber  311 . That is, the radiant burner  330  may be completely fixed by the coupling member S in the state where the radiant burner  330  is temporarily fixed by the rear fixing part  347 . The rear fixing part  347  includes a horizontal extension part  348  and a rear attachment part  349 . 
     The horizontal extension part  348  extends horizontally from a rear end of the burner support part  341 . The horizontal extension part  348  may have a length that is determined so that a front end of the horizontal extension part  349  is disposed adjacent to the rear surface of the first oven cavity  310  in a state where the front attachment part  345  is closely attached to the front surface of the first oven cavity  310 . 
     Also, the rare attachment part  349  is bent downward from a front end of the horizontal extension part  348 . The rear attachment part  349  is closely attached to the rear surface of the first oven cavity  310 . Here, it is preferable that the rear attachment part  349  has a predetermined length in a vertical direction. 
     A coupling hook  349 A is disposed on the rear attachment part  349 . The coupling hook  349 A is formed by cutting a portion of the rear attachment part  349  and bending the rear attachment part  340  in a rear direction. The coupling hook  349 A is inserted into the coupling slot  315  when the rear attachment part  349  is closely attached to the rear surface of the first oven cavity  310 . 
     Referring again to  FIG. 1 , the second oven unit  300  is disposed under the first oven unit  300 . The second oven unit  300  includes a second oven cavity  410  having a second oven chamber  311 , a second oven door  420  selectively opening or closing the second oven chamber  311 , and a heating source (not shown) providing heat for cooking foods within the second oven chamber  311 . At least one of a broil burner, a bake burner, and a convection device may be used as the heating source. 
     Hereinafter, an operation of the gas oven according to the first embodiment of the present invention will be described in detail with reference to the accompanying drawings. 
       FIGS. 3 and 4  are views illustrating a process of fixing a burner to the gas oven according to the first embodiment of the present invention. 
     First, referring to  FIG. 3 , the radiant burner  330  is fixed to the burner bracket  340 . Then, the burner bracket  340  to which the radiant burner  330  is fixed is moved into the first oven chamber  311 . Here, the burner bracket  340  to which the radiant burner  330  is fixed is moved in a direction in which a rear end of the burner bracket  340  is inclined upward than a front end of the burner bracket  340 . 
     Referring to  FIG. 4 , the burner bracket  340  to which the radiant burner  330  is fixed is continuously moved into the first oven chamber  311  to allow an end of the mixing tube  335  to pass through the tube through hole  317 , thereby extending to the outside of the first oven chamber  311 . Also, when the burner bracket  340  to which the radiant burner  330  is fixed is continuously moved into the first oven chamber  311 , the rear attachment part  349  is closely attached to the rear surface of the first oven cavity  310 . 
     Also, when the rear attachment part  349  is closely attached to the rear surface of the first oven cavity  310 , the hook  349 A is inserted into the coupling slot  315 . Thus, the rear end of the burner bracket  340  to which the radiant burner  330  is fixed is not randomly moved in vertical direction. That is to say, the burner bracket  340  may be temporarily fixe to a predetermined position. 
     Next, in the state where the coupling hook  349 A is inserted into the coupling slot  315 , the rear end of the burner bracket  340  to which the radiant burner  330  is fixed is rotated with respect to the front end of the burner bracket  340  in a clockwise direction in  FIG. 4  to allow the front attachment part  345  and the upper attachment part  346  to be respectively closely attached to the front and top surfaces of the first oven cavity  310 . Also, in the state where the front attachment part  345  and the upper attachment part  346  are respectively closely attached to the front and top surfaces of the first oven cavity  310 , as shown in  FIG. 2 , the burner bracket  340  to which the radiant burner  330  is fixed is fixed to the first oven cavity  310  by using the coupling member S. Thus, the radiant burner  330  is substantially fixed to the first oven cavity  310 . 
     The radiant burner  330  fixed to the first oven cavity  310  may be separated from the first oven cavity  310  in a reverse order of the process for fixing the radiant burner  330  to the first oven cavity  310 . That is, in the state where the coupling member S is separated, when the burner bracket  340  to which the radiant burner  330  is fixed is moved forward from the first oven cavity  310 , the coupling hook  349 A is separated from the coupling slot  315 , and thus, the radiant burner  330  is separated from the first oven cavity  310 . 
     Hereinafter, a gas oven according to a second embodiment of the present invention will be described in detail with reference to the accompanying drawings. 
       FIG. 5  is an exploded perspective view of a gas oven according to a second embodiment of the present invention. The same components as those of the first embodiment will be derived from the reference numerals of  FIGS. 1 and 2 , and thus their detailed descriptions will be omitted. 
     Referring to  FIG. 5 , in the current embodiment, a broil burner  330 ′ is disposed in an upper portion of a first oven chamber  311 . The broil burner  330 ′ has a lattice shape on the whole. Also, a plurality of flame holes  331 ′ are defined in a circumference of the broil burner  330 ′. Also, foods within the first oven chamber  311  is heated and cooked by flame generated when a mixed gas, which is mixed with air, discharged from the frame holes  331 ′ is burned. 
     An overall configuration of a burner bracket  340  for fixing the broil burner  330 ′ may be substantially similar to the burner bracket  340  according to the first embodiment. However, a burner support part  341  of the burner bracket  340  according to the current embodiment has a lattice shape corresponding to that of the broil burner  330 ′. Thus, a bottom surface of the broil burner  330 ′ is closely attached to a top surface of the burner support part  341 . Of cause, the burner support part  341  may have an approximately rectangular frame shape. However, to more efficiently support the broil burner  330 ′ through the burner bracket  340 , it may be preferably that the burner support part  341  has the lattice shape than the rectangular frame shape. Also, other components of the burner bracket  340 , i.e., a front fixing part  343  and a rear fixing part  347  may be the same as those according to the first embodiment of the present invention. 
     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 the foregoing first and second embodiments of the present invention, although the bracket body, the front fixing part, and the rear fixing part constituting the burner bracket are integrated with each other, the present invention is not limited thereto. That is, a portion of the bracket body and the front fixing part may be provided as one member. Also, a remaining portion of the burner support part  341  and the rear fixing part may be provided as the other one member. 
     Also, in the current embodiment, although the coupling hook  349 A is inserted into the coupling slot  315 , and the rare fixing part is temporarily fixed to the rear surface of the oven chamber, the present invention is not limited to the mechanism for fixing the rear fixing part. For example, the rear fixing part may also be fixed to the rear surface of the oven chamber by the coupling member in a method equal or similar to the method for fixing the front fixing part. However, the coupling member for fixing the rear fixing part may also pass through the rear fixing part in a horizontal direction, like the coupling member for fixing the front fixing part, and thus be coupled to the rear surface of the oven cavity. 
     In the above-described embodiments, although the gas oven including the two oven units are described as an example, the present invention may be applied to a gas oven including one oven unit. 
     MODE FOR CARRYING OUT THE INVENTION 
     Hereinafter, a gas oven according to a third embodiment of the present invention will be described in detail with reference to the accompanying drawings. 
       FIG. 6  is a cross-sectional view of a main part according to a third embodiment of the present invention. The same components as those of the foregoing first and second embodiments will be derived from  FIGS. 1 to 5 , and thus their detailed descriptions will be omitted. 
     Referring to  FIG. 6 , in the current embodiment, a temperature sensor  650  detects a temperature of a radiant burner  630  installed in an upper portion of an oven chamber  310 . The radiant burner  630  includes a burner pot  631 , a combustion mat  633 , an ignition device  635 , a mixing tube  637 , and a nozzle  639 . 
     In more detail, the burner pot  631  has a polyhedral shape with an opened bottom surface. Also, a mixed gas is substantially supplied into the burner pot  631 . 
     The combustion mat  633  is disposed on the opened bottom surface of the burner pot  631 . Substantially, the mixed gas supplied into the burner pot  633  is burned in the combustion mat  631 . In more detail, the mixed gas supplied into the burner pot  631  is surface-burned on a surface of the combustion mat  633 , i.e., the bottom surface of the combustion mat  633 . For this, the combustion mat  633  may be formed of a porous material so that the mixed gas supplied into the burner pot  631  passes through the combustion mat  333 . 
     The ignition device  635  ignites the mixed gas on a surface of the combustion mat  633 . For example, a spark method generating sparks for igniting the mixed gas or a heating method heating the mixed gas to ignite the mixed gas may be used as the ignition device  635 . 
     The mixing tube  637  generates the mixed gas to be supplied into the burner pot  631 . That is to say, the mixing tube  637  may mix a gas with air to supply the mixed gas into the burner pot  631 . For this, the mixing tube  637  has an end connected to the burner pot  631 . 
     The nozzle  639  sprays a gas for generating the mixed gas supplied into the burner pot  631 . In more detail, the nozzle  639  is disposed at a rear side of the mixing tube  637 . Also, the nozzle  639  sprays a gas toward the mixing tube  637  at a high pressure. Here, air together with the gas sprayed through the nozzle  639  is transferred into the mixing tube  637 , and then, the air is mixed with the gas while flowing into the mixing tube  637  to supply the mixed gas into the burner pot  631 . 
     The supply of the gas into the nozzle  639  and an amount of gas supplied into the nozzle  639  may be adjusted by the valve  640 . That is, the supply of the gas into the nozzle  639  is determined according to an opening or closing of the valve  640 . Also, an amount of gas supplied into the nozzle  639  is adjusted according to an opened degree of the valve  640 . 
     Also, the temperature sensor  650  is disposed on a top surface of the burner pot  630  to detect a temperature of the inside of the burner pot  631 . Of cause, the temperature sensor  640  may directly detect a temperature of the inside of the burner pot  631 . 
     Hereinafter, an operation of the gas oven according to the third embodiment of the present invention will be described in detail with reference to the accompanying drawings. 
     First, a signal for performing cooking of foods, for example, a signal for setting a temperature of the inside of the oven chamber  310  and a cooking time is inputted by using an oven unit  300 . Also, a control unit  660  controls an operation of a radiant burner  630  so that the cooking of the foods within the oven chamber  310  is performed according to the inputted signal. 
     In more detail, the control unit  660  opens the valve  640  and adjusts an opened degree of the value  640  to control the supply of the mixed gas into the burner pot  631 . Also, the control unit  660  operates the ignition device  635  to control combustion of the mixed gas on a bottom surface of the combustion mat  633 . 
     The temperature sensor  650  detects a temperature of the burner pot  631 . Also, the control unit  660  covers the valve  640  in a case where the temperature of the burner pot  631  detected by the temperature sensor  650  exceeds a safety temperature. Thus, since the supply of the mixed gas into the burner pot  631  is blocked, the combustion of the mixed gas on the bottom surface of the combustion mat  633 , i.e., the operation of the radiant burner is stopped. 
     Hereinafter, a gas oven according to a fourth embodiment of the present invention will be described in detail with reference to the accompanying drawings. 
       FIG. 7  is a schematic view of a gas oven according to a fourth embodiment of the present invention. The same components as those of the first to third embodiments will be derived from the reference numerals of  FIGS. 1 and 6 , and thus their detailed descriptions will be omitted. 
     Referring to  FIG. 7 , in the current embodiment, when the temperature of a burner pot  631  exceeds a preset safety temperature, a valve  640  is covered by a thermostat  651 . Thus, in the current embodiment, a separate control by a control unit is not required. Also, when the temperature of the burner pot  631  exceeds the safety temperature, the valve  640  may be covered by the thermostat  651 . 
     Hereinafter, a gas oven according to a fifth embodiment of the present invention will be described in detail with reference to the accompanying drawings. 
       FIG. 8  is a cross-sectional view of a main part according to a fifth embodiment of the present invention. The same components as those of the foregoing first and second embodiments will be derived from  FIGS. 1 to 5 , and thus their detailed descriptions will be omitted. 
     Referring to  FIG. 8 , in the current embodiment, a mixed gas is uniformly burned over an entire surface of a radiant burner  730  disposed inside an over chamber  310 . For this, the radiant burner  730  includes a burner pot  731 , a combustion mat  733 , an ignition device  735 , a mixing tube  737 , and a nozzle  739 . Also, a plurality of flow interference ribs  732 A,  732 B, and  732 C are disposed in the burner pot  731 . 
     The burner pot  731  has a polyhedral shape with an opened bottom surface. Also, a mixed gas is substantially supplied into the burner pot  731 . A passage P 1  is defined within the burner pot  731 . 
     The plurality of flow interference ribs  732 A,  732 B, and  732 C are disposed within the burner pot  731 . The flow interference ribs  732 A,  732 B, and  732 C are configured to uniformly burn the mixed gas on the entire surface of the combustion mat  733  by interfering with the mixed gas within the passage P 1 . That is to say, the flow interference ribs  732 A,  732 B, and  732 C guide the mixed gas, which is suctioned through a gas supply hole  731 A to flow into the passage P 1 , toward the combustion mat  733  to allow the mixed gas to uniformly flow onto the combustion mat  733 . 
     In more detail, the flow interference ribs  732 A,  732 B, and  732 C may be provided in three ribs that extend toward a bottom surface of the burner pot  731  from a top surface of the burner pot  731 . The flow interference ribs  732 A,  732 B, and  732 C are spaced a predetermined distance from each other in a flow direction of the mixed gas within the passage P 1 , i.e., a direction form an upstream side toward a downstream of the passage P 1 . Hereinafter, one of the flow interference ribs  732 A,  732 B, and  732 C disposed at a relatively upstream side in a direction in which the mixed gas flows into the passage P 10  is referred to as a first flow interference rib  732 A, and the remaining flow inference ribs disposed at a downstream side with respect to the first flow interference rib  732 A are respectively referred to as second and third flow interference ribs  732 B and  732 C. 
     The first to third flow interference ribs  732 A,  732 B, and  732 C have heights that are increased in stages from the top surface of the burner pot  731 , respectively. That is, the second flow interference rib  732 B is disposed relatively higher than the first flow interference rib  732 A, and the third flow interference rib  732 C is disposed relatively higher than the second flow interference rib  732 B. Thus, substantially, a flow-sectional area of the passage P 1  may be gradually decreased from the upstream side toward the downstream side thereof by the first to third flow interference ribs  732 A,  732 B, and  732 C. 
     Hereinafter, an operation of the gas oven according to the fifth embodiment of the present invention will be described in detail with reference to the accompanying drawings. 
       FIG. 9  is a cross-sectional view illustrating a flow of the mixed gas in a radiant burner according to the fifth embodiment of the present invention. 
     Referring to  FIG. 9 , the valve  740  is opened to supply the mixed gas into the burner pot  731 . Also, the ignition device  734  is operated to burn the mixed gas on the bottom surface of the combustion mat  733 . 
     The mixed gas supplied into the burner pot  731  flows into the burner pot  731 , i.e., the passage P 1 . Also, the mixed gas flowing into the passage P 1  interferes in flow by the first to third flow interference ribs  732 A,  732 B, and  732 C, and substantially, is guided toward the combustion mat  733  by the first to third flow interference ribs  732 A,  732 B, and  732 C. Thus, the mixed gas flowing into the passage P 1  may be uniformly transferred onto the entire surface of the combustion mat  733 , and substantially, may be uniformly burned on the entire surface of the combustion mat  733 . 
     Also, when the mixed gas is uniformly burned on the entire surface of the combustion mat  733 , radiant heat is uniformly transferred into the oven chamber  310 . Thus, foods may be uniformly and generally heated without being partially heated within the oven chamber  310 . 
     Hereinafter, a gas oven according to a sixth embodiment of the present invention will be described in detail with reference to the accompanying drawings. 
       FIG. 10  is a cross-sectional view of a main part of a gas oven according to a sixth embodiment of the present invention. The same components as those of the first and second embodiments will be derived from the reference numerals of  FIGS. 1 and 5 , and thus their detailed descriptions will be omitted. 
     Referring to  FIG. 10 , in the current embodiment, a flow-sectional area of a passage P 2  in which a mixed gas flows is gradually decreased from an upstream side toward a downstream side of the passage P 2  by a shape of a burner pot  831 . In more detail, the burner pot  831  has a polyhedral shape with an opened bottom surface. Also, the burner pot  831  has a top surface that is inclined downward from the upstream side toward the downstream side of the passage P 2 . Thus, substantially, since the burner pot  831  has the inclined top surface, the flow-sectional area of a passage P 2  is gradually decreased from the upstream side toward the downstream side of the passage P 2 .