Cooking device

Abstract

To provide a cooking device capable of achieving improvement in combustibility of a grill burner and uniform grilling of an object to be cooked while improving a lamp black burning effect by an after burner.SOLUTION: An after burner is attached to the upper side of an exhaust duct in a posture in which a burning surface is directed downward. A control plate 61 is provided in a communication port between a grill chamber and the exhaust duct. The control plate 61 includes an opening part 63, a right closing part 64, a left closing part 65, a right half opening part 66, and a left half opening part 67. The opening part 63 is provided in the center of the control part 61 and opens the communication port. The right closing part 64 and the left closing part 65 are provided on both of the right and left end sides of the control plate 61, and close the communication port. The right half opening part 66 is provided between the right closing part 64 and the opening part 63, and the left half opening part 67 is provided between the left closing part 65 and the opening part 63. The right half opening part 66 and the left half opening part 67 close the lower half of the communication port and open the upper half.SELECTED DRAWING: Figure 9

Description

[Technical Field]

[0001] The present invention relates to a cooking device. [Background technology]

[0002] Conventionally, there is known a grill in which an afterburner is installed near the entrance of an exhaust passage that leads from the rear of a grill chamber, in which grill burners for heating food are arranged above and below, to the outside at the top (see, for example, Patent Document 1). The afterburner burns off oily smoke generated by the food. In this grill, a shielding plate is installed facing the front of the afterburner, and the shielding plate has an opening that is cut out in a roughly U-shape. The opening is opened to a length equal to or less than the width of the afterburner. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2012-13326 Summary of the Invention [Problem to be solved by the invention]

[0004] However, because the opening area of ​​the shielding plate is narrow, exhaust resistance increases, which may affect the combustion performance of the grill burners installed inside the grill chamber. On the other hand, if the opening area is widened on both sides, the combustion exhaust generated from the grill burners installed on the left and right sides of the grill chamber will heat up to a position slightly away from the center of the grill chamber in the left and right direction, and then flow into the exhaust passage without spreading to both sides. Therefore, there is a possibility that the cooking degree will be uneven between the center and both left and right sides.

[0005] An object of the present invention is to provide a cooking device that can improve the burning effect of oily smoke by the afterburner, while improving the combustion performance of the grill burner and achieving uniform doneness of cooked food. [Means for solving the problem]

[0006] The cooking device of claim 1 comprises a grill compartment, a pair of burners provided on both the left and right sides of the grill compartment, an exhaust duct connected to the rear of the grill compartment and discharging the exhaust gas flowing from the grill compartment, an afterburner attached to the upper part of the exhaust duct with its combustion surface facing downward, and a control plate provided at a communication port between the grill compartment and the exhaust duct and controlling the flow of the exhaust gas flowing from the grill compartment to the exhaust duct through the communication port, the control plate comprising: a closing portion provided at both left and right ends of the control plate, the upper end of which is the highest of the control plate, and closing the communication port; an opening portion provided in the center of the left and right direction, the upper end of which is the lowest of the control plate, and opening the communication port; and a half-open portion provided between the closing portion and the opening portion, the upper end of which is located between the height of the upper end of the closing portion and the height of the upper end of the opening portion, closing the lower half of the communication port and opening the upper half.

[0007] In the exhaust duct of the cooking device of claim 2, an inclined plate may be provided below the combustion surface of the afterburner, the inclined plate being bent rearward from the lower end of the control plate and sloping obliquely upward as it extends rearward. [Effects of the Invention]

[0008] According to the cooking device of claim 1, the combustion exhaust generated by heating inside the grill chamber is first collected in the center of the lower half of the communication port due to the closed and semi-open portions of the control plate, and then flows toward the exhaust duct. Therefore, the grill device can effectively transfer heat to the center of the grill chamber, ensuring uniform cooking between the center and both left and right sides. Furthermore, the combustion exhaust collected in the center flows into the exhaust duct, centered around the open portion of the control plate. This allows the cooking device to reliably direct the combustion exhaust toward the combustion surface of the afterburner. Meanwhile, the upper half of the communication port is widely open to the left and right due to the open and semi-open portions. Therefore, the grill device can prevent excessive exhaust resistance near the communication port, improving the combustibility of the grill burner.

[0009] According to the cooking device of claim 2, by arranging the inclined plate below the combustion surface of the afterburner, the combustion exhaust gas flowing through the exhaust duct can be pushed up toward the combustion surface. This allows the cooking device to improve the afterburner's ability to burn off oil in the combustion exhaust gas. Furthermore, by arranging the inclined plate below the exhaust duct, the cooking device can also reduce the area in the exhaust duct that is far from the afterburner's combustion surface and where the afterburner's oil burning effect is difficult to achieve. [Brief explanation of the drawings]

[0010] [Figure 1] FIG. 1 is a perspective view of a grill device 1. [Figure 2] FIG. 2 is a right side view of the grill device 1. [Figure 3] FIG. 1 is a cross-sectional perspective view of a grill device 1. [Figure 4] FIG. 1 is an exploded perspective view of a grill device 1. [Figure 5] FIG. 2 is an exploded perspective view of the burner support base 3 and the afterburner 7. [Figure 6] FIG. [Figure 7] FIG. 2 is an exploded perspective view of the duct body 4. [Figure 8]FIG. 8 is an exploded perspective view of the duct body 4 as seen from an angle different from that of FIG. 7. [Figure 9] 10 is a diagram showing the flow of combustion exhaust gas in the grill chamber 2. FIG. [Figure 10] 2 is a diagram showing the flow of combustion exhaust gas in an exhaust duct 10. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0011] An embodiment of the present invention will be described below. Unless otherwise specified, the devices, component configurations, etc. described below are not intended to be limiting and are merely illustrative examples. The drawings are used to explain technical features that may be adopted by the present invention. In this embodiment, the front-to-back, left-to-right, and up-to-down directions shown in the drawings will be used for explanation. Furthermore, the scales of the drawings do not necessarily match each other, and the drawings are enlarged or reduced as appropriate depending on the objects shown.

[0012] The configuration of the grill device 1 will be described with reference to Figures 1 to 4. The grill device 1 is attached inside the housing of a built-in stove (not shown). As shown in Figures 1 to 3, the grill device 1 includes a grill chamber 2 and an exhaust duct 10. The grill chamber 2 contains food to be cooked, which is heated and cooked using a grill burner (described below). The grill burner generates combustion exhaust gas inside the grill chamber 2 by gas combustion.

[0013] The exhaust duct 10 is connected to the rear of the grill chamber 2. The exhaust duct 10 is chimney-shaped and extends upward. A communication port 9 is provided between the rear of the grill chamber 2 and the exhaust duct 10. The communication port 9 connects the inside of the grill chamber 2 with the inside of the exhaust duct 10. The exhaust duct 10 comprises a duct bottom plate 27, a burner support base 3, an afterburner 7, and a duct body 4, which will be described later (see Figure 4).

[0014] The structure of the grill chamber 2 will now be described. The grill chamber 2 is a roughly rectangular parallelepiped with an open front. A grill opening 13 is formed in the front of the grill chamber 2. The grill opening 13 is opened and closed by a grill door (not shown). The grill chamber 2 comprises a lower case 11 and an upper case 12. The upper case 12 is fixed to the top of the lower case 11 with screws (not shown). An upper burner 21 is provided in roughly the center of the upper case 12. The gas inlet portion 22 of the upper burner 21 is throat-shaped and is provided in the right rear corner of the upper case 12, opening to the right.

[0015] The structure of the lower case 11 will be described. As shown in FIG. 4, the lower case 11 has a bottom wall 15, a right wall 16, a left wall 17, and a back wall 18, and is box-shaped with an open top and front. A moving mechanism 19 is provided within the lower case 11. The moving mechanism 19 has rails and supports the grill door and grill grate (not shown) so that they can slide freely in the front-to-rear direction. A lower burner 23 is provided on the inner surface of the right wall 16, extending in the front-to-rear direction. A lower burner 24 is provided on the inner surface of the left wall 17, extending in the front-to-rear direction. The lower burners 23 and 24 face each other and form a flame toward the center of the grill chamber 2. The gas inlet portions 25 of the lower burners 23 and 24 are throat-shaped and are provided in the right rear portion of the lower case 11, opening to the right. In this embodiment, the upper burner 21 and the lower burners 23 and 24 are collectively referred to as "grill burners."

[0016] A sensor box 26 is provided in the center of the inner surface of the back wall 18 in the left-right direction. A temperature sensor (not shown) is provided in the sensor box 26. The temperature sensor measures the temperature inside the grill chamber 2.

[0017] As shown in Figures 3 and 4, a duct bottom plate 27 is screwed to the upper rear end side of the lower case 11. The duct bottom plate 27 protrudes rearward from the upper rear end side of the lower case 11 and is generally rectangular in plan view. The duct bottom plate 27 forms the bottom of the exhaust duct 10. A protruding piece 28 is provided at the rear end of the duct bottom plate 27. The protruding piece 28 protrudes diagonally upward from the rear side of the grill chamber 2. As shown in Figure 4, a fixing hole 271 is provided at the right rear corner of the duct bottom plate 27, a fixing hole 272 is provided at the right front corner, a fixing hole 273 is provided at the left rear corner, and a fixing hole 274 is provided at the left front corner. A straightening member 6 is screwed to the upper surface of the duct bottom plate 27.

[0018] 3 and 4, the structure of the rectifying member 6 will be described. The rectifying member 6 is formed in a substantially L-shape when viewed from the right side, and includes a control plate 61 and an inclined plate 62.

[0019] The control plate 61 will now be described. The control plate 61 is placed at the communication opening 9 with its face facing in the front-to-rear direction. The control plate 61 controls the flow of combustion exhaust gas from the grill chamber 2 to the exhaust duct 10 through the communication opening 9. The control plate 61 has an open section 63, a right closing section 64, a left closing section 65, a right half-open section 66, and a left half-open section 67. The open section 63 is located in the center of the control plate 61 in the left-to-right direction and has the lowest upper end of the control plate 61, opening the communication opening 9 in the front-to-rear direction. The right closing section 64 is located on the right end of the control plate 61 and has the highest upper end of the control plate 61, closing the communication opening 9. The left closing section 65 is located on the left end of the control plate 61 and is at the same height as the right closing section 64, closing the communication opening 9.

[0020] The right half open section 66 is provided between the right closing section 64 and the open section 63, and the height of its upper end is located between the height of the upper end of the right closing section 64 and the height of the upper end of the open section 63, closing the lower half of the communication port 9 and opening the upper half in the front-to-rear direction. The left half open section 67 is provided between the left closing section 65 and the open section 63, and the height of its upper end is the same as the height of the upper end of the right half open section 66, closing the lower half of the communication port 9 and opening the upper half in the front-to-rear direction. Control of the flow of combustion exhaust gas by the control plate 61 will be described later.

[0021] The inclined plate 62 will now be described. The inclined plate 62 has a generally rectangular shape in a plan view, and is gently inclined diagonally upward from the lower end of the control plate 61 toward the rear side. A support piece 621 is provided at the rear end of the inclined plate 62. The support piece 621 protrudes downward from the rear end of the inclined plate 62. The lower end of the support piece 621 contacts the upper surface of the duct bottom plate 27. Therefore, the support piece 621 supports the inclined plate 62 on the upper surface of the duct bottom plate 27.

[0022] The structure of the burner support base 3 will be described with reference to Figures 4 and 5. As shown in Figure 4, the burner support base 3 is fixed to the rear of the grill chamber 2 and forms the upstream portion (front end portion) of the exhaust duct 10. As shown in Figure 5, the burner support base 3 supports the afterburner 7, thermistor 351, and igniter electrode 352 (see Figure 10). The burner support base 3 is equipped with a support plate 31, a right plate 32, a left plate 33, and a covering plate 34.

[0023] The support plate 31 has a rectangular shape that is long in the left-right direction in a plan view. An opening 37 is provided in the support plate 31. The opening 37 has a substantially rectangular shape that is long in the left-right direction, and exposes a combustion surface 75 (see FIG. 10 ) of the afterburner 7, which will be described later, downward. Four fixing holes 311 are provided at the front end of the support plate 31 with a space between them on the left and right, and two fixing holes 312 are provided at the rear end with a space between them on the left and right.

[0024] The right plate 32 hangs down from the right end of the support plate 31 and is generally trapezoidal in side view. A fixing piece 321 is provided at the lower end of the right plate 32. The fixing piece 321 is generally rectangular in plan view and protrudes rightward from the lower end of the right plate 32. A fixing hole 322 is provided in the center of the fixing piece 321. An insertion hole 323 that penetrates in the left-right direction is provided near the upper end of the right plate 32. A thermistor 351 is inserted into the insertion hole 323. The thermistor 351 is fixed by a press plate (not shown) that is fixed to the underside of the support plate 31. The tip of the thermistor 351 is located below the support plate 31 and on the right end side of the opening 37.

[0025] The left plate 33 hangs down from the left end of the support plate 31 and is symmetrical to the right plate 32. A rectangular fixing piece (not shown) protruding to the left is provided at the bottom end of the left plate 33. A fixing hole (not shown) is provided in the center of the fixing piece. An insertion hole (not shown) penetrating in the left-right direction is also provided near the top end of the left plate 33. An igniter electrode 352 (see Figures 4 and 10) is inserted into the insertion hole. The igniter electrode 352 is fixed by a presser plate (not shown) fixed to the underside of the support plate 31. The tip of the igniter electrode 352 is located below the support plate 31 and on the left end side of the opening 37.

[0026] A substantially triangular closure plate 38 is provided between the right end side of the front end of the support plate 31 and the front end of the right plate 32. A cover piece 381 that protrudes forward is provided between the lower oblique side of the closure plate 38 and the lower portion of the front end of the right plate 32. The cover piece 381 has a substantially V-shape that opens toward the left when viewed from the front. A substantially triangular closure plate 39 is provided between the left end side of the front end of the support plate 31 and the front end of the left plate 33. A cover piece 391 that protrudes forward is provided between the lower oblique side of the closure plate 39 and the lower portion of the front end of the left plate 33. The cover piece 391 has a substantially V-shape that opens toward the right when viewed from the front.

[0027] The closing plate 34 extends vertically upward from the rear end of the support plate 31 and has a generally rectangular shape that is long in the left-right direction when viewed from the front. The closing plate 34 closes an opening 461 provided in the front wall 46 of the duct main body 4 (described later). The closing plate 34 is provided with a reinforcing bulge 341. The bulge 341 is linear and long in the left-right direction when viewed from the front, and bulges from the front to the rear by press-forming of sheet metal. A fixing piece 36 is provided at the upper end of the closing plate 34, folding back toward the front. The fixing piece 36 has a generally rectangular shape that is long in the left-right direction when viewed from the top. Fixing holes 361 are provided in three locations in the fixing piece 36: in the center, on the right side, and on the left side.

[0028] As shown in FIG. 5, the afterburner 7 includes a burner body 71 and a burner flange 72. The burner body 71 is formed in a box shape that is long in the left-right direction and has an open bottom. A gas inlet 74 is provided at the right end of the burner body 71. The gas inlet 74 is throat-shaped and opens to the right. Gas and air flow in from the gas inlet 74 and are mixed inside the burner body 71. The burner flange 72 is fixed to the bottom of the burner body 71 and has a substantially rectangular frame shape that is long in the left-right direction when viewed from the bottom. A combustion body 70 (see FIG. 10) is fitted into an opening (not shown) inside the burner flange 72. A combustion surface 75 is formed on the bottom surface of the combustion body 70. The combustion surface 75 is exposed downward at the opening of the burner flange 72. The mixed gas mixed in the burner body 71 is supplied to the combustion body 70 and burns on the combustion surface 75, forming a flame that is directed downward.

[0029] A fixing flange 73 is provided on the outer periphery of the burner flange 72. The fixing flange 73 protrudes outward. The fixing flange 73 is a generally rectangular frame that is long in the left-right direction when viewed from the bottom. Four fixing holes 731 are provided at intervals on the front side of the fixing flange 73, and two fixing holes (not shown) are provided at intervals on the rear side.

[0030] The afterburner 7 is attached to the support plate 31 of the burner support base 3 from above. The fixing flange 73 of the burner flange 72 is positioned on the upper surface of the support plate 31. The combustion body 70 is positioned in the opening 37 provided in the support plate 31. Four fixing holes 731 provided in the front part of the fixing flange 73 are positioned with four fixing holes 311 provided on the front end side of the support plate 31 and are fastened with screws 91 (see FIG. 4). Two fixing holes (not shown) provided in the rear part of the fixing flange 73 are positioned with two fixing holes (not shown) provided on the rear end side of the support plate 31 and are fastened with screws (not shown). In this way, the afterburner 7 is attached to the burner support base 3. The burner support base 3 is positioned on the underside of the support plate 31 with the combustion surface 75 of the afterburner 7 facing downward.

[0031] The structure of the duct body 4 will be described with reference to Figures 4 and 6 to 8. As shown in Figure 4, the duct body 4 is connected to the rear of the burner support base 3 and forms the portion of the exhaust duct 10 downstream of the afterburner 7. As shown in Figure 6, the duct body 4 is generally box-shaped with openings on the front and bottom. An exhaust port 49 is provided at the rear end of the upper surface of the duct body 4. The exhaust port 49 is generally rectangular and elongated in the left-right direction in a plan view. An exhaust passage is formed inside the duct body 4, extending from the open front surface to the exhaust port 49. When the duct body 4 is viewed from the front, a catalyst plate 5 is attached inside the duct body 4. The catalyst plate 5 is positioned midway through the exhaust passage. The duct body 4 includes a duct front member 41 and a duct rear member 42 (see Figures 6 to 8).

[0032] 7 and 8, the structure of the duct front member 41 will be described. The duct front member 41 is generally inverted U-shaped and opens downward when viewed from the front. The duct front member 41 has an upper wall 43, a right wall 44, a left wall 45, and a front wall 46.

[0033] The upper wall 43 has a generally rectangular shape that is long in the left-right direction in a plan view. A protruding piece 431 is provided at the rear end of the upper wall 43. The protruding piece 431 protrudes diagonally upward relative to the rear side. The right rear corner of the upper wall 43 is fastened from above with a screw 93 to a fixing piece (not shown) that protrudes to the left from the front end side of the upper end of a right wall 44 (described below). The left rear corner of the upper wall 43 is also fastened from above with a screw 93 to a fixing piece (not shown) that protrudes to the right from the front end side of the upper end of a left wall 45 (described below). As a result, the left-right separation distance between the right wall 44 and the left wall 45 is maintained by the upper wall 43 being interposed therebetween.

[0034] The right wall 44 hangs down from the right end of the upper wall 43. The front end of the right wall 44 is generally linear and extends vertically in a side view. The rear end of the right wall 44 is a bent line that bends forward at gradually different angles from the top to the bottom. Therefore, the width of the right wall 44 in the front-to-rear direction narrows toward the bottom. Three insertion pieces 44A, 44B, and 44C (see FIG. 8 ) are provided in order from bottom to top on the rear end of the right wall 44. The positions of these insertion pieces 44A, 44B, and 44C correspond to the positions of slits 47A, 47B, and 47C provided in the right end of the duct rear member 42, which will be described later. Before the duct front member 41 is attached to the duct rear member 42, the insertion pieces 44A, 44B, and 44C protrude rearward. 7 and 8 show the state after the duct front member 41 has been attached to the duct rear member 42, and as will be described later, the insertion pieces 44A, 44B, and 44C are all bent to the left. The right wall 44 has a fixing hole 441, a pair of locking slits 442, a fixing piece 443, and a reinforcing rib 445.

[0035] The fixing hole 441 is provided in approximately the center of the upper half of the right wall 44. A pair of locking slits 442 are positioned diagonally across the center of the fixing hole 441, with the upper locking slit 442 being provided in front of the fixing hole 441 and the lower locking slit 442 being provided behind the fixing hole 441. The fixing piece 443 protrudes to the right from the lower end of the right wall 44. A fixing hole 444 is provided in the fixing piece 443. The reinforcing rib 445 is provided in an approximately straight line along approximately the lower half of the front end side of the right surface of the right wall 44. The reinforcing rib 445 bulges from the left to the right by press forming of sheet metal.

[0036] The left wall 45 hangs down from the left end of the upper wall 43. The left wall 45 has a symmetrical shape to the right wall 44. Three insertion pieces 45A, 45B, and 45C (see FIG. 8) are provided at the rear end of the left wall 45, starting from the bottom. The positions of these insertion pieces 45A, 45B, and 45C correspond to the positions of slits 48A, 48B, and 48C (see FIG. 7) provided at the left end of the duct rear member 42, which will be described later. Before the duct front member 41 is attached to the duct rear member 42, the insertion pieces 45A, 45B, and 45C protrude rearward. Note that FIGS. 7 and 8 show the state after the duct front member 41 is attached to the duct rear member 42, and as will be described later, the insertion pieces 45A, 45B, and 45C are all bent to the right. The left wall 45, like the right wall 44, has a fixing hole 451, a pair of locking slits 452, a fixing piece 453, and a reinforcing rib 455.

[0037] The front wall 46 hangs down from the lower end of the upper wall 43 and extends to approximately the middle in the up-down direction between the right wall 44 and the left wall 45. An opening 461 that is rectangular in front view is provided in the front wall 46. The lower end of the opening 461 is flush with the lower end of the front wall 46, so the front wall 46 is approximately U-shaped and opens downward in front view. A protruding piece 462 is provided at the upper end of the opening 461. The protruding piece 462 has a rectangular shape that is long in the left-right direction in plan view and protrudes forward from the upper end of the opening 461. The protruding piece 462 has fixing holes 463 provided in three locations: the center, right side, and left side. The positions of these three fixing holes 463 correspond to the positions of the three fixing holes 361 (see FIG. 5) provided in the fixing piece 36 of the burner support base 3.

[0038] The structure of the duct rear member 42 will be described with reference to Figures 7 and 8. The duct rear member 42 is attached to the rear side of the duct front member 41 and forms the rear wall of the duct main body 4. The duct rear member 42 has a generally rectangular shape that is elongated in the vertical direction when viewed from the front, and a broken line shape that slopes forward at different angles from the upper end to the lower end when viewed from the side. The shape of the duct rear member 42 in a side view corresponds to the shape of the rear end of each of the right wall 44 and the left wall 45. The duct rear member 42 includes, in order from the bottom to the top, a first inclined portion 421, a second inclined portion 422, a third inclined portion 423, and a fourth inclined portion 424. The first inclined portion 421, the second inclined portion 422, the third inclined portion 423, and the fourth inclined portion 424 are all generally rectangular panels that are elongated in the horizontal direction.

[0039] The first inclined portion 421 is inclined obliquely upward from the lower end of the duct rear member 42 at a steep angle θ1 (see FIG. 10) toward the rear side. θ1 is, for example, 80°. The second inclined portion 422 is inclined obliquely upward from the upper end of the first inclined portion 421 toward the rear side at an angle θ2 (see FIG. 10) that is smaller than that of the first inclined portion 421. θ2 is, for example, 35°. The third inclined portion 423 is inclined obliquely upward from the upper end of the second inclined portion 422 toward the rear side at an angle larger than that of the second inclined portion 422. The fourth inclined portion 424 extends from the upper end of the third inclined portion 423 to the upper end of the duct rear member 42.

[0040] The right and left ends of the first inclined portion 421 are provided with approximately trapezoidal bent pieces 471, 481. The right and left ends of the second inclined portion 422 are provided with approximately trapezoidal bent pieces 472, 482. The right and left ends of the third inclined portion 423 are provided with approximately trapezoidal bent pieces 473, 483. The right and left ends of the fourth inclined portion 424 are provided with approximately trapezoidal bent pieces 474, 484. Slits 47A, 48A are provided at the base ends of the bent pieces 471, 481, respectively. Slits 47B, 48B are provided at the base ends of the bent pieces 473, 483, respectively. Slits 47C, 48C are provided at the base ends of the bent pieces 474, 484, respectively.

[0041] The catalyst plate 5 and fixing member 50 will be described with reference to Figures 7 and 8. The catalyst plate 5 is rectangular, and is, for example, a heat-resistant ceramic plate with a plurality of small holes, on which an oxidation catalyst such as platinum is supported. The catalyst plate 5 is heated and activated by the heat of combustion from the afterburner 7. When the combustion exhaust gas passes through the catalyst plate 5, the catalyst plate 5 oxidizes the oily smoke in the combustion exhaust gas, making it odorless and smokeless. A fixing member 50 is attached to such a catalyst plate.

[0042] The fixing member 50 is a member for fixing the catalyst plate 5 inside the duct body 4. The fixing member 50 includes a first frame 51 and a second frame 52. When the thickness direction of the catalyst plate 5 is oriented in the vertical direction, the first frame 51 is attached to the lower surface side of the catalyst plate 5, and the second frame 52 is attached to the upper surface side of the catalyst plate 5.

[0043] As shown in FIG. 7 , the first frame 51 has a generally rectangular frame shape that is long in the left-right direction in a plan view. A rectangular opening 511 is provided in the center of the first frame 51. A central beam 512 is provided in the left-right center of the opening 511. A right support wall 53 is provided at the right end of the first frame 51, and a left support wall 54 is provided at the left end. The right support wall 53 and the left support wall 54 are generally rectangular. The right support wall 53 protrudes upward from the center of the right end of the first frame 51 and supports the right surface of the catalyst plate 5 from the right. The left support wall 54 protrudes upward from the center of the left end of the first frame 51 and supports the left surface of the catalyst plate 5 from the left.

[0044] The right support wall 53 has a fixing hole 531 and a pair of locking ribs 532. The fixing hole 531 is provided at the center and upper side of the right support wall 53 in the width direction. The pair of locking ribs 532 are provided at both ends of the right support wall 53 in the width direction (front-to-back direction) and protrude to the right. The left support wall 54 also has a fixing hole 541 and a pair of locking ribs 542. The fixing hole 541 is provided at the center and upper side of the left support wall 54 in the width direction. The pair of locking ribs 542 are provided at both ends of the left support wall 54 in the width direction (front-to-back direction) and protrude to the left.

[0045] 8, the second frame 52 also has a generally rectangular frame shape that is long in the left-right direction in a plan view. A rectangular opening 521 is provided in the center of the second frame 52. A central beam 522 is provided in the left-right center of the opening 521.

[0046] The catalyst plate 5 is placed and positioned on the upper surface of the first frame 51, and the second frame 52 is placed and positioned on top of that. The second frame 52 is fixed to the first frame 51 with the catalyst plate 5 sandwiched therebetween. This attaches the fixing member 50 to the catalyst plate 5. The fixing member 50 holds the catalyst plate 5 between the first frame 51 and the second frame 52.

[0047] 6 to 8, an example of a method for attaching the catalyst plate 5 to the duct body 4 will be described. For ease of explanation, when the fixing member 50 is attached to the catalyst plate 5, the surface on the first frame 51 side will be referred to as the front surface of the catalyst plate 5, and the surface on the second frame 52 side will be referred to as the rear surface of the catalyst plate 5.

[0048] As shown in Figures 7 and 8, first, with the fixing member 50 attached to the catalyst plate 5, the catalyst plate 5 is inserted into the inside of the duct front member 41. At this time, the screws 93, 93 that fixed the top wall 43 of the duct front member 41 to the right wall 44 and left wall 45 are removed. Therefore, by bending the right wall 44 and left wall 45 in directions away from each other and opening them, the catalyst plate 5 can be easily inserted into the inside of the duct front member 41. As described above, the duct front member 41 has a generally inverted U-shape that opens downward when viewed from the front, so the front, rear, and bottom sides of the duct front member 41 are widely open. This allows the catalyst plate 5 to be easily inserted into the inside of the duct front member 41 while being checked.

[0049] Next, with the front surface of the catalyst plate 5 inserted inside the duct front member 41 tilted diagonally downward, the pair of locking ribs 532 provided on the right support wall 53 of the fixing member 50 are locked into the pair of locking slits 442 provided in the right wall 44 of the duct front member 41. Furthermore, the pair of locking ribs 542 provided on the left support wall 54 of the fixing member 50 are locked into the pair of locking slits 452 provided in the left wall 45 of the duct front member 41.

[0050] At this time, the fixing hole 531 formed in the right support wall 53 of the fixing member 50 is aligned with the fixing hole 441 formed in the right wall 44 of the duct front member 41. The fixing hole 541 formed in the left support wall 54 of the fixing member 50 is aligned with the fixing hole 451 formed in the left wall 45 of the duct front member 41. Then, the screw 92 is inserted from the right into the fixing hole 441 in the right wall 44 and fastened to the fixing hole 531 in the right support wall 53. Furthermore, the screw 92 is inserted from the left into the fixing hole 451 in the left wall 45 and fastened to the fixing hole 541 in the left support wall 54.

[0051] The right rear corner of the upper wall 43 is then fixed from above to a fixing piece (not shown) protruding to the left from the front end side of the upper end of the right wall 44 by fastening a screw 93 thereto. The left rear corner of the upper wall 43 is also fixed from above to a fixing piece (not shown) protruding to the right from the front end side of the upper end of the left wall 45 by fastening a screw 93 thereto. This maintains the left-right separation distance between the right wall 44 and the left wall 45 by the presence of the upper wall 43, preventing the right wall 44 and the left wall 45 from moving apart. In this way, the catalyst plate 5 can be easily attached in the above-mentioned inclined position inside the duct front member 41 via the fixing member 50.

[0052] Next, the duct rear member 42 is attached to the duct front member 41 from the rear. Insert the insertion pieces 44A, 44B, and 44C provided at the rear end of the right wall 44 of the duct front member 41 into the right slits 47A, 47B, and 47C of the duct rear member 42, respectively, and bend them to the left. Next, insert the insertion pieces 45A, 45B, and 45C provided at the rear end of the left wall 45 of the duct front member 41 into the left slits 48A, 48B, and 48C of the duct rear member 42, respectively, and bend them to the right. At this time, the right bent pieces 471 to 474 of the duct rear member 42 abut against the outer surface of the right wall 44 of the duct front member 41. Furthermore, the left bent pieces 481 to 484 of the duct rear member 42 abut against the outer surface of the left wall 45 of the duct front member 41. As a result, the duct rear member 42 is fixed to the duct front member 41, and the assembly of the duct main body 4 is completed with the catalyst plate 5 attached inside.

[0053] As described above, the duct body 4 is box-shaped with its front and bottom sides open, and an outlet 49 is formed on the rear end side of the top surface of the duct body 4. A protruding portion 101 that protrudes forward of the outlet 49 is formed on the front side of the duct body 4. The protruding portion 101 is a corner portion that protrudes at a substantially right angle in side view and is formed by the top wall 43, the front end side of the right wall 44, the front end side of the left wall 45, and the front wall 46.

[0054] 10, the catalyst plate 5 is attached in such a manner that its upper end fits into the protruding portion 101 of the duct body 4. This allows the exhaust duct 10 to have a wide cross-sectional area at the position of the duct body 4 where the catalyst plate 5 is attached, thereby preventing pressure loss of the combustion exhaust gas within the exhaust duct 10. Therefore, the grill device 1 can maintain good combustibility of the grill burner within the grill chamber 2.

[0055] In this embodiment, the catalyst plate 5 is attached to the inside of the duct front member 41, and then the duct rear member 42 is attached from behind it, but other attachment methods may also be used.

[0056] 4, an example of a method for assembling the exhaust duct 10 to the grill chamber 2 will be described. First, the burner support base 3 is installed on the upper surface of the duct bottom plate 27 fixed to the upper rear end side of the lower case 11. The afterburner 7 may be attached to the burner support base 3 in advance.

[0057] Next, the fixing hole 322 of the fixing piece 321 provided at the lower end of the right plate 32 of the burner support base 3 is aligned with the fixing hole 271 provided at the right rear corner of the duct bottom plate 27. Furthermore, the fixing hole (not shown) of the fixing piece provided at the lower end of the left plate 33 of the burner support base 3 is aligned with the fixing hole 273 provided at the left rear corner of the duct bottom plate 27. This positions the burner support base 3 on the upper surface of the duct bottom plate 27. At this time, the cover pieces 381, 391 provided on the front side of the burner support base 3 are brought into contact with the outer surfaces on both the left and right sides of the rear end of the upper case 12 of the grill chamber 2.

[0058] Next, the duct body 4 is installed on the upper surface of the duct bottom plate 27, behind the burner support base 3. At this time, the left and right ends of the closing plate 34 of the burner support base 3 are inserted into the rear sides of the front wall 46 on both the left and right sides through the front opening 461 of the duct body 4. In this state, the duct body 4 is shifted rearward relative to the burner support base 3, so that the left and right ends of the rear surface of the front wall 46 come into contact with the left and right ends of the front surface of the closing plate 34. As a result, the front protruding piece 462 of the duct body 4 is positioned on the upper surface of the fixing piece 36 provided at the upper end of the closing plate 34 of the burner support base 3. At this time, the three fixing holes 463 provided in the protruding piece 462 of the duct body 4 are positioned with the three fixing holes 361 provided in the fixing piece 36 of the burner support base 3, respectively. Furthermore, when the duct body 4 is shifted rearward relative to the burner support base 3, the left and right ends of the front surface of the blocking plate 34 come into contact with the left and right ends of the rear surface of the front wall 46, which also prevents the blocking plate 34 from coming loose.

[0059] Then, the fixing piece 443 provided at the lower end of the right wall 44 of the duct main body 4 is placed on top of the fixing piece 321 provided at the lower end of the right plate 32 of the burner support base 3. Then, screws (not shown) are fastened from above into the fixing holes 444 provided in the fixing piece 443, the fixing holes 322 provided in the fixing piece 321, and the fixing holes 271 in the duct bottom plate 27.

[0060] Furthermore, the fixing piece 453 provided at the lower end of the left wall 45 of the duct main body 4 is placed on top of the fixing piece (not shown) provided at the lower end of the left plate 33 of the burner support base 3. Then, screws (not shown) are fastened from above into the fixing holes 454 provided in the fixing piece 453, the fixing holes (not shown) provided in the fixing piece, and the fixing holes 273 of the duct bottom plate 27. This fixes the burner support base 3 and the duct main body 4 to the upper surface of the duct bottom plate 27.

[0061] Next, since the three fixing holes 463 provided in the protruding piece 462 of the duct main body 4 are positioned with the three fixing holes 361 provided in the fixing piece 36 of the burner support base 3, screws are fastened into these three fixing holes 463. This connects the duct main body 4 to the rear of the burner support base 3. Thus, the duct bottom plate 27, burner support base 3, and duct main body 4 are integrated at the rear of the grill chamber 2, and the exhaust duct 10 is completed.

[0062] In such an exhaust duct 10, an expanded width portion 100 is formed behind the mounting position of the afterburner 7. The mounting position of the afterburner 7 is the position of the support plate 31 of the burner support base 3. The expanded width portion 100 is a box-shaped portion whose vertical width is discontinuous and rises upward significantly behind the mounting position of the afterburner 7.

[0063] Furthermore, at the bottom side of the widened section 100, the first inclined section 421 of the duct rear member 42 is inclined diagonally upward at a steep angle. This forms a constricted section 150 between the mounting position of the afterburner 7 and the widened section 100. At the constricted section 150, the lower part of the duct rear member 42 is constricted forward. Therefore, at the constricted section 150, the flow path area of ​​the combustion exhaust gas is narrower than the flow path area of ​​other parts of the exhaust duct 10.

[0064] With reference to Figure 9, the flow of combustion exhaust gas inside the grill chamber 2 will be described. The combustion exhaust gas generated by heating with the grill burner inside the grill chamber 2 flows toward the communication port 9. A control plate 61 of the flow straightening member 6 is provided at the communication port 9. The control plate 61 is provided so as to separate the communication port 9, and an opening 63 is provided in the center of the control plate 61 in the left-right direction. This makes it easy for the combustion exhaust gas to flow from the opening 63 toward the inside of the exhaust duct 10. Therefore, the combustion exhaust gas flowing from the opening 63 into the exhaust duct 10 flows along the center of the left-right direction of the exhaust path. Therefore, the control plate 61 can efficiently guide the combustion exhaust gas to the afterburner 7 provided downstream of the communication port 9.

[0065] Furthermore, the control plate 61 separates the communication opening 9, but the upper half of the communication opening 9 (the area indicated by the two-dot chain line P in FIG. 9 ) is left open to the left and right by the central opening 63, right half opening 66, and left half opening 67 of the control plate 61. This allows the exhaust gas from combustion to flow into the exhaust duct 10 via the upper half of the communication opening 9. Therefore, the grill device 1 can prevent the exhaust resistance inside the grill chamber 2 from increasing excessively, thereby preventing a decrease in the combustibility of the grill burner.

[0066] Meanwhile, in the lower half of the communication opening 9, only the area of ​​the central open section 63 is open due to the right half open section 66, left half open section 67, right closed section 64, and left closed section 65. As a result, the combustion exhaust generated by combustion in the left and right lower burners 23, 24 of the grill chamber 2 first gathers in the left-right central section in the lower section of the grill chamber 2 before flowing rearward. Therefore, heat can be effectively transmitted to the central section of the grill chamber 2, which is far from the lower burners 23, 24, so that the food can be cooked to a uniform degree of doneness between the central section and both left and right sections.

[0067] Referring to Figure 10, the flow of combustion exhaust gas within exhaust duct 10 will be described. The combustion exhaust gas that flows rearward through communication port 9 flows directly below combustion surface 75 of afterburner 7. Afterburner 7 burns and eliminates oily smoke contained in the combustion exhaust gas. In addition, below combustion surface 75 of afterburner 7, inclined plate 62 of straightening member 6 is disposed. Inclined plate 62 is inclined obliquely upward relative to the rear side. This allows straightening member 6 to gradually narrow the distance between combustion surface 75 and inclined plate 62, so that the combustion exhaust gas can be pushed up toward combustion surface 75. This further enhances the afterburner 7's effect of burning off oily smoke.

[0068] Furthermore, the space between the duct bottom plate 27 and the first inclined portion 421 may become a dead space where the exhaust gas is difficult to flow. This dead space is a part of the exhaust duct 10 that is far from the combustion surface 75 of the afterburner 7, making it difficult for the afterburner 7 to effectively burn off oil. By placing the inclined plate 62 in such a space, the flow of the exhaust gas can be pushed upward.

[0069] The exhaust gas from the combustion that flows rearward just below the combustion surface 75 of the afterburner 7 is first concentrated in the constricted portion 150, and then pushed into the widened portion 100, where it quickly diffuses vertically. The catalyst plate 5 is supported in the widened portion 100 in an inclined position with its front surface facing diagonally downward. This allows the front surface of the catalyst plate 5 to face the exhaust gas flowing diagonally upward from the combustion surface 75 of the afterburner 7. The exhaust gas from the combustion can therefore pass smoothly through the porous interior of the catalyst plate 5, preventing excessive exhaust resistance in the exhaust duct 10 of the grill apparatus 1.

[0070] The catalyst plate 5 is then heated and activated by the heat of combustion from the afterburner 7. Within the widened section 100, the exhaust gas diffuses vertically and uniformly contacts the catalyst plate 5. As the exhaust gas passes through the catalyst plate 5, the oily smoke in the exhaust gas is oxidized, making it odorless and smokeless.

[0071] Furthermore, the combustion heat that flows downward from the combustion surface 75 along the combustion direction of the afterburner 7 is pushed toward the widened section 100 by the flow of exhaust combustion air from inside the grill chamber 2. The combustion heat pushed into the widened section 100 is widely diffused in the vertical direction together with the exhaust combustion air. This allows the exhaust duct 10 to uniformly transfer the combustion heat of the afterburner 7 to the catalyst plate 5, so that the catalyst plate 5 is heated uniformly and without waste. Therefore, the grill device 1 can evenly dissipate the oily smoke in the exhaust combustion air over a wide area of ​​the catalyst plate 5.

[0072] The combustion exhaust gas that has passed through the catalyst plate 5 and has been rendered odorless and smokeless is discharged from the exhaust duct 10 through the exhaust port 49.

[0073] In this exhaust duct 10, the catalyst plate 5 is supported in the widened portion 100 in the inclined position described above, so that the front surface of the catalyst plate 5 is close to the combustion surface 75, and the front surface of the catalyst plate 5 faces the combustion surface 75. This allows the grill device 1 to efficiently heat the catalyst plate 5 using the combustion heat of the afterburner 7, further improving the oily smoke dissipation effect of the catalyst plate 5.

[0074] Furthermore, the inclined plate 62 arranged on the upper surface of the duct bottom plate 27 gradually narrows the distance to the combustion surface 75, allowing the combustion heat from the combustion surface 75 to be further diffused up and down in the widened portion 100. This allows the catalyst plate 5 to be heated more uniformly, further improving the oil smoke dissipation effect of the catalyst plate 5.

[0075] As described above, the grill device 1 of this embodiment comprises the grill chamber 2, the pair of left and right lower burners 23, 24, the exhaust duct 10, the afterburner 7, and the control plate 61. The pair of left and right lower burners 23, 24 are provided on both the left and right sides of the grill chamber 2. The exhaust duct 10 communicates with the rear of the grill chamber 2 and discharges the combustion exhaust gas flowing from inside the grill chamber 2. The afterburner 7 is attached to the upper side of the exhaust duct 10 with its combustion surface 75 facing downward. The control plate 61 is provided at the communication port 9 between the grill chamber 2 and the exhaust duct 10. The control plate 61 controls the flow of the combustion exhaust gas flowing from the grill chamber 2 to the exhaust duct 10 via the communication port 9.

[0076] The control plate 61 includes an open portion 63, a right blocking portion 64, a left blocking portion 65, a right half open portion 66, and a left half open portion 67. The right blocking portion 64 and the left blocking portion 65 are provided at both left and right ends of the control plate 61, have the highest upper end of the control plate 61, and block the communication port 9. The open portion 63 is provided in the center of the control plate 61 in the left and right directions, have the lowest upper end of the control plate 61, and open the communication port 9. The right half open portion 66 is provided between the right blocking portion 64 and the open portion 63, and has an upper end positioned between the upper end of the right blocking portion 64 and the upper end of the open portion 63. The left half open portion 67 is provided between the left blocking portion 65 and the open portion 63, and has an upper end positioned between the upper end of the left blocking portion 65 and the upper end of the open portion 63. The right half open portion 66 and the left half open portion 67 block the lower half of the communication port 9 and open the upper half.

[0077] With the above configuration, the combustion exhaust generated within the grill chamber 2 is first collected in the left-right center of the grill chamber 2 by the right closing portion 64, left closing portion 65, right half-open portion 66, and left half-open portion 67 of the control plate 61 in the lower half of the communication port 9, and then flows toward the exhaust duct 10. Therefore, the grill device 1 can effectively transfer heat to the center of the grill chamber 2, thereby achieving uniform doneness between the center and both left and right sides. Furthermore, the combustion exhaust collected in the center flows into the exhaust duct 10 through the open portion 63 of the control plate. This allows the grill device to reliably direct the combustion exhaust toward the combustion surface of the afterburner. Meanwhile, the upper half of the communication port 9 is widely open to the left and right by the open portion 63, right half-open portion 66, and left half-open portion 67. This prevents excessive exhaust resistance near the communication port 9, thereby improving the combustibility of the grill burner.

[0078] Additionally, within the exhaust duct 10, below the combustion surface 75 of the afterburner 7, an inclined plate 62 is provided, which is bent rearward from the lower end of the control plate 61 and slopes diagonally upward as it moves rearward. This allows the combustion exhaust flowing into the exhaust duct 10 to be pushed up toward the combustion surface 75, thereby improving the effectiveness of the afterburner 7 in burning off oil in the combustion exhaust. Furthermore, by locating the inclined plate 62 on the lower side within the exhaust duct 10, it is possible to reduce the area of ​​the exhaust duct 10 that is far from the combustion surface 75 of the afterburner 7 and where the afterburner 7 is less likely to burn off oil.

[0079] The present invention is not limited to the above embodiment, and various modifications are possible. The above embodiment is a grill device 1, but the present invention can also be applied to any cooking device equipped with a grill chamber 2, such as a table stove or a built-in stove.

[0080] In the above embodiment, the grill burners in the grill chamber 2 are composed of the upper burner 21 and a pair of left and right lower burners 23, 24, but for example, the upper burner 21 may be omitted.

[0081] In the above embodiment, the catalyst plate 5 is attached to the fixing member 50 and then installed inside the duct body 4, but the installation structure inside the duct body 4 may be a structure other than that of the above embodiment. The fixing member 50 is composed of a first frame 51 and a second frame 52, but the catalyst plate may be fixed to a single frame. Also, the inclined plate 62 may be omitted from the straightening member 6. [Explanation of symbols]

[0082] 1 Grilling device 2 Grill compartment 7. Afterburner 9 Connecting port 10 Exhaust duct 23,24 Lower burner 61 Control Panel 63 Open area 64 Right occlusion 65 Left occlusion 66 Right half open part 67 Left half open part 75 Burning Surface

Claims

1. A grill cabinet and A pair of burners provided on both the left and right sides of the grill chamber; An exhaust duct that communicates with the rear of the grill chamber and discharges combustion exhaust gas flowing from the grill chamber; an afterburner attached to the upper side of the exhaust duct with its combustion surface facing downward; a control plate provided at a communication port between the grill chamber and the exhaust duct, for controlling the flow of the combustion exhaust gas flowing from the grill chamber to the exhaust duct through the communication port; Equipped with The control plate is a closing portion provided on each end of the control plate in the left-right direction, the closing portion having the highest upper end and closing the communication port; an opening portion provided in the center in the left-right direction, the upper end of the control plate having the lowest height, and opening the communication port; a half-open portion that is provided between the closing portion and the opening portion, the height of an upper end of which is located between the height of the upper end of the closing portion and the height of the upper end of the opening portion, and that closes a lower half of the communication port and opens an upper half of the communication port; A heating and cooking device comprising:

2. In the exhaust duct, below the combustion surface of the afterburner, an inclined plate is provided, which is bent rearward from the lower end of the control plate and inclined obliquely upward as it goes rearward. The heating and cooking device according to claim 1 .

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