Heating cooker

Abstract

To provide a heating cooker which can stabilize a sealing property of a seal member.SOLUTION: A heating cooker 1 includes: a gas burner 30; a top panel 20; a burner ring 50 covering a gap S between the gas burner 30 and an opening 23 for a burner on the top panel 20 and provided above an opening peripheral edge 24 of the top panel 20; and an annular seal member 40 interposed between the top panel 20 and the burner ring 50. A rib 52 projects downwardly from an outer peripheral edge part of the burner ring 50. The seal member 40 has: a first seal part 41; and a second seal part 42 positioned on an outer periphery than the first seal part 41 and formed thinner than the first seal part 41. The first seal part 41 is arranged between a pressing part 51 positioned on an inner periphery than the rib 52 of the burner ring 50 and the top panel 20, and is compressed between itself and the top panel 20 by being pressed downward by the pressing part 51. The second seal part 42 is arranged between the rib 52 and the top panel 20.SELECTED DRAWING: Figure 6

Description

[Technical Field]

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

[0002] An example of a conventional cooking device is disclosed in Patent Document 1. This cooking device includes a gas burner, a top plate, a burner ring, and an annular sealing member.

[0003] The gas burner burns fuel gas to heat an object to be heated. A burner opening through which the gas burner is inserted is formed in the top plate. The burner ring covers the gap between the gas burner and the burner opening and is disposed above the opening periphery of the burner opening in the top plate. The seal member is interposed between the upper surface of the top plate and the burner ring and is in close contact with the upper surface of the opening periphery of the top plate.

[0004] The burner ring has an annular rib protruding downward from its outer peripheral end, and the seal member has an annular first seal portion and an annular second seal portion that is positioned further outward than the first seal portion and is thinner than the first seal portion.

[0005] The rib of the burner ring is placed on the upper surface of the second seal portion, and the lower surface of the rib abuts against the upper surface of the second seal portion. On the other hand, the lower surface of a portion of the burner ring located more inward than the rib is not in contact with the first seal portion, and a gap is provided between the lower surface of that portion and the upper surface of the first seal portion.

[0006] In this cooking appliance, a seal member is attached to the upper surface of the opening periphery of the top plate, and the rib of the burner ring is placed on the second seal member of the seal member. In this cooking appliance, the gap between the top surface of the top plate and the rib is filled with the second seal member, thereby preventing broth on the top plate from seeping into the burner ring through the gap. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] Japanese Patent Application Laid-Open No. 2011-058784 Summary of the Invention [Problem to be solved by the invention]

[0008] However, when manufacturing a burner ring, it is difficult to completely eliminate variations in dimensional accuracy due to distortion. Furthermore, due to the shape of the burner ring, distortion tends to increase closer to the outer periphery. Therefore, the pressing force acting on the second seal portion from the rib provided at the outer periphery of the burner ring varies due to distortion, and the compression rate of the thin-walled second seal portion tends to vary. As a result, the above-mentioned conventional cooking appliances have a problem of lacking sealing stability in the sealing member.

[0009] In particular, when the burner ring is a casting, distortion at the outer peripheral edge tends to become large due to the influence of the casting being pushed out by an ejector pin when it is released from the mold, making this problem more pronounced.

[0010] The present invention has been made in view of the above circumstances, and an object to be achieved is to provide a cooking device that can achieve stable sealing performance in a sealing member. [Means for solving the problem]

[0011] The cooking device of the present invention comprises: a gas burner that burns a fuel gas to heat an object to be heated; a top plate having a burner opening through which the gas burner is inserted; a burner ring that covers a gap between the gas burner and the burner opening and is disposed above a peripheral edge of the burner opening in the top plate; a ring-shaped seal member interposed between the upper surface of the top plate and the burner ring, The burner ring includes an annular rib protruding downward from an outer peripheral end of the burner ring; an annular pressing portion located more inward than the rib; The seal member includes an annular first seal portion, a second seal portion having an annular shape and positioned more outer than the first seal portion and formed to be thinner than the first seal portion; the first seal portion is disposed between the pressing portion and the top plate, and is pressed downward by the pressing portion to be compressed between the pressing portion and the top plate; The second seal portion is disposed between the rib and the top plate.

[0012] In the cooking device of the present invention, the thick first seal portion is compressed, which reduces the effect on the compression rate due to variations in the pressing force during compression compared to when the thin second seal portion is compressed. Furthermore, the first seal portion is compressed by the pressing portion, which is located more inward than the ribs and tends to have less distortion than the ribs. Therefore, the variation in the pressing force acting from the pressing portion on the first seal portion can be reduced compared to the variation in the pressing force acting from the ribs on the second seal portion when the second seal portion is compressed by the ribs. These features reduce variations in the sealing performance of the first seal portion compressed by the pressing portion, ensuring stable sealing performance between the top surface of the top plate and the burner ring.

[0013] Therefore, the cooking device of the present invention can achieve stable sealing performance in the sealing member.

[0014] It is preferable that a gap be provided between the lower surface of the rib and the upper surface of the second seal portion.

[0015] In this case, by setting the gap between the rib and the second seal portion to a predetermined amount, it is possible to prevent the rib and the second seal portion from coming into contact with each other due to distortion within the expected range of the burner ring. Furthermore, even if distortion of the burner ring causes the rib to come into contact with the second seal portion in a portion of the circumferential direction, it is possible to prevent the pressing force acting from the rib on the second seal portion at that contact point from becoming excessive. This prevents the pressing force acting from the pressing portion on the first seal portion from varying. As a result, it is possible to further reduce variations in the sealing performance of the first seal portion. Furthermore, the tolerance for distortion is expanded in the manufacture of burner rings, thereby improving productivity.

[0016] It is preferable that the rib and the second seal portion are in contact with each other. Furthermore, when the second seal portion is compressed between the rib and the top plate, it is preferable that the first compression amount of the first seal portion is greater than the second compression amount of the second seal portion.

[0017] In this case, the abutment between the rib and the second seal portion allows the second seal portion to seal the gap between the top surface of the top plate and the burner ring in addition to the first seal portion. This improves the sealing performance between the top surface of the top plate and the burner ring. Furthermore, when the second seal portion is compressed between the rib and the top plate, even if the pressing force acting on the first seal portion from the pressing portion varies, the thick first seal portion, which is compressed by a large first compression amount, can effectively absorb the variation. This is advantageous for stabilizing the sealing performance of the first seal portion. Furthermore, the tolerance for distortion is expanded during the manufacture of the burner ring, improving productivity.

[0018] The radial width of the first seal portion is preferably greater than the radial width of the second seal portion.

[0019] In this case, the wider first seal portion of the seal member is compressed, so that the sealing performance of the first seal portion can be further stabilized.

[0020] The burner ring is held movably relative to the top plate, and the sealing member preferably contains a fluororesin.

[0021] In this case, the slidability of the seal member is improved, making it easier to move the burner ring relative to the top plate while keeping the pressing portion in sliding contact with the first seal portion, thereby improving the ease of attachment of the burner ring to the top plate.

[0022] The burner ring is preferably a casting.

[0023] If the burner ring is a cast product, productivity is superior compared to when the burner ring is processed by sheet metal processing or the like. However, in the manufacture of cast products, for example, when the cast product is demolded, the cast product is easily distorted at its outer peripheral edge due to the influence of being pushed out by an ejector pin. Therefore, when the burner ring is a cast product, the pressing force acting from the rib to the second seal portion is likely to vary greatly. In this regard, according to the present invention, stable sealing can be ensured by the first seal portion pressed by the pressing portion, so the effects of the present invention are more pronounced when the burner ring is a cast product. [Effects of the Invention]

[0024] The cooking device of the present invention can achieve stable sealing performance in the sealing member. [Brief explanation of the drawings]

[0025] [Figure 1] FIG. 1 is a perspective view of a cooking device according to a first embodiment. [Figure 2] FIG. 2 is an exploded perspective view showing a top plate, a burner ring, and a sealing member of the cooking device of the first embodiment. [Figure 3] FIG. 3 is a perspective view of a sealing member in the cooking device of the first embodiment. [Figure 4] FIG. 4 is a partially exploded perspective view of the cooking device of the first embodiment, showing the trivet, the burner ring, the seal member, the top plate, the burner, the seal ring, and the ring body. [Figure 5]FIG. 5 is a partially exploded perspective view of the top plate of the cooking device of the first embodiment, seen from the back, showing the burner ring, the seal member, the top plate, the seal ring, and the ring body. [Figure 6] FIG. 6 is a partial cross-sectional view of the cooking device of the first embodiment, taken along line AA in FIG. 1, showing the burner, burner ring, seal member, top plate, heat sink, seal ring, and ring body. [Figure 7] 7 is a partially enlarged cross-sectional view of the cooking device of the first embodiment taken along line AA in FIG. 1, showing the burner ring, the seal member, the top plate, the heat sink, the seal ring, and the ring body. [Figure 8] FIG. 8 is a partially enlarged cross-sectional view similar to FIG. 7 of a cooking device according to a second embodiment, showing a burner ring, a seal member, a top plate, a heat dissipation plate, a seal ring, and a ring body. DETAILED DESCRIPTION OF THE INVENTION

[0026] Hereinafter, first and second embodiments of the present invention will be described with reference to the drawings.

[0027] Example 1 As shown in Figure 1, the cooking device 1 of Example 1 is an example of the cooking device of the present invention, and is a so-called built-in gas stove installed in a kitchen, etc. This cooking device 1 is integrated into a countertop 5 along a wall 3 of a system kitchen, for example.

[0028] Cooking appliance 1 includes appliance body 10 with an open top, and a top plate 20 that covers the opening on the top of appliance body 10 from above. In Fig. 1, the front surface of cooking appliance 1 is referred to as the front of cooking appliance 1, the depth direction of cooking appliance 1 when viewed from the front side is referred to as the front-rear direction, the width direction perpendicular to the front-rear direction is referred to as the left-right direction, and the height direction perpendicular to the front-rear and left-right directions is referred to as the up-down direction, and the front-rear direction, left-right direction, and up-down direction are all indicated in Fig. 2 and subsequent figures in accordance with Fig. 1.

[0029] The appliance body 10 has a generally rectangular box shape. Inside the appliance body 10, there are provided three gas burners 30, a grill 11 for grilling, and a control unit (not shown) for controlling these. On the front of the appliance body 10, there is provided a group of switches 12 for issuing desired instructions and making various settings to the control unit. The group of switches 12 includes, for example, a power switch for turning the power of the cooking appliance 1 on and off, a gas burner operation unit for igniting and extinguishing each gas burner 30 and adjusting the heat power, and a grill burner operation unit for igniting and extinguishing a grill burner (not shown) and adjusting the heat power, etc.

[0030] As shown in Figures 1 and 2, the top plate 20 has a generally rectangular shape extending in the front-to-rear and left-to-right directions. As shown in Figures 5 to 7, the top plate 20 has a top plate main body 21 and a heat dissipation plate 22. The top plate main body 21 is made of heat-resistant glass such as crystallized glass, and forms the upper surface of the top plate 20. The heat dissipation plate 22 has a generally rectangular shape that is smaller than the top plate main body 21, and is bonded to the lower surface (rear surface) of the top plate main body 21. The heat dissipation plate 22 is made of a metal such as aluminum, and dissipates heat from the top plate 20 during cooking.

[0031] Three burner openings 23 are formed in the top plate body 21. The three burner openings 23 are arranged on the top plate 20 at a front left position, a front right position, and a rear center position. As shown in FIGS. 2 and 4, the periphery of each burner opening 23 on the top plate 20 is an opening periphery 24. Also, as shown in FIGS. 5 and 6, three insertion holes 26 are formed in the heat sink 22. Each insertion hole 26 is provided at a position corresponding to one of the burner openings 23. Each burner opening 23 and each insertion hole 26 are arranged concentrically. The inner diameter of each insertion hole 26 is set smaller than the inner diameter of the corresponding burner opening 23.

[0032] A gas burner 30 is inserted into each burner opening 23. Each gas burner 30 extends upward from the appliance body 10, passes through each insertion hole 26 and each burner opening 23, and protrudes above the top plate 20. Of the three gas burners 30, the gas burner 30 located at the rear of the top plate 20 is smaller than the remaining two gas burners 30 located at the front of the top plate 20. The two gas burners 30 located at the front of the top plate 20 are of the same size.

[0033] Three seal members 40, three burner rings 50, and three trivets 60 are arranged on the top plate 20. Three seal rings 70 and three ring bodies 80 are also arranged below the top plate 20 (see Figures 4 and 5, etc.). A cooking vessel 7 (see Figure 1), such as a pot, is placed on the trivet 60 as an object to be heated. Furthermore, an exhaust port 25 is formed at the rear of the top plate 20 to discharge combustion exhaust from the grill 11 provided on the appliance body 10.

[0034] The seal member 40 and the seal ring 70 have the same or approximately the same inner diameter. At the radial position of the seal member 40, the inner peripheral edge of the seal member 40 coincides or approximately coincides with the inner peripheral edge of the opening peripheral portion 24. The inner diameter of the ring body 80 is smaller than the inner diameter of the seal ring 70, and the inner diameter of a central opening 50a of the burner ring 50, which will be described later, is smaller than the inner diameter of the ring body 80.

[0035] The seal member 40 is disposed on the upper surface of the opening periphery 24 of each burner opening 23 in the top plate 20. The burner ring 50 covers the gap S (see FIG. 4 ) between the gas burner 30 and the burner opening 23, and is disposed above each opening periphery 24 in the top plate 20. That is, the seal member 40 is disposed between the upper surface of the opening periphery 24 of the top plate 20 and the outer peripheral portion of the burner ring 50. The trivet 60 is disposed in a position surrounding the gas burner 30 and the burner ring 50. Furthermore, below the top plate 20, a seal ring 70 is disposed below the seal member 40, and a ring body 80 is disposed below the seal ring 70.

[0036] Each gas burner 30 has the same configuration. Each seal member 40, each burner ring 50, each trivet 60, each seal ring 70, and each ring body 80 also have the same configuration. In the following explanation, the gas burner 30, seal member 40, burner ring 50, trivet 60, seal ring 70, and ring body 80 arranged in the front right position of the top plate 20 as shown in Figure 4 will be explained. The other gas burners 30, seal member 40, burner ring 50, trivet 60, seal ring 70, and ring body 80 arranged in the front left position and the rear center position of the top plate 20, respectively, are the same as the respective components arranged in the front right position of the top plate 20, so explanations will be omitted.

[0037] The gas burner 30 has the same configuration as a known gas burner and burns fuel gas supplied from the outside. As shown in Figures 4 and 6, the gas burner 30 has a burner body 31, a burner head 32, and a burner cap 33.

[0038] As shown in Figure 6, a vertical cylindrical section 31a that extends vertically with a constant diameter is formed at the top of the burner body 31, and this vertical cylindrical section 31a is exposed above the top plate 20 through the burner opening 23. The burner head 32 is detachably placed on the burner body 31. The burner cap 33 has an annular shape and covers the top of the burner head 32. A temperature sensor 34 is provided at the center of the gas burner 30. The temperature sensor 34 penetrates the burner cap 33 and protrudes above the burner cap 33, and abuts against the bottom of the cooking vessel 7 placed on the trivet 60 to detect the temperature of the cooking vessel 7.

[0039] An annular distribution chamber 35 is formed inside the burner body 31. The distribution chamber 35 is connected to a mixing tube (not shown) provided inside the appliance main body 10. The burner head 32 also has an inner cylinder portion 32a formed in a cylindrical shape and extending vertically downward. The inner cylinder portion 32a is disposed inside the burner body 31 and closes the inside of the distribution chamber 35.

[0040] In the mixing tube, fuel gas supplied from the outside is mixed with air to generate mixed gas. This mixed gas is ejected from a plurality of flame ports 32b (see FIG. 4) provided in the burner head 32 via a distribution chamber 35, and voltage is applied to an ignition plug 36 facing one of the flame ports 32b, igniting the gas burner 30 and causing gas combustion. In this way, the gas burner 30 can heat the cooking vessel 7 placed on the trivet 60 by gas combustion.

[0041] The seal member 40 is made of a fluororesin, specifically PTFE (polytetrafluoroethylene). As shown in FIG. 3, the seal member 40 has an annular first seal portion 41 and an annular second seal portion 42. The second seal portion 42 is located on the outer periphery of the first seal portion 41 and is formed integrally with the first seal portion 41. The second seal portion 42 is also formed thinner than the first seal portion 41. As shown in FIG. 7, in the radial direction of the seal member 40, the width D1 of the first seal portion 41 is larger by a predetermined amount than the width D2 of the second seal portion 42. Specifically, the value of D1 is set to be at least twice the value of D2. A pair of notches 43 is formed at the outer peripheral end of the seal member 40.

[0042] 6 and 7, the first seal portion 41 is disposed between a pressing portion 51 (described later) of the burner ring 50 and the top plate 20. The second seal portion 42 is disposed between a rib 52 (described later) of the burner ring 50 and the top plate 20. The lower surface of the seal member 40, i.e., the lower surface of the first seal portion 41 and the lower surface of the second seal portion 42, are in close contact with the upper surface of the opening periphery 24 of the top plate 20.

[0043] The burner ring 50 is a casting, specifically an aluminum die-cast product. As shown in Fig. 2 etc., the burner ring 50 has an annular shape and has a central opening 50a through which the gas burner 30 faces.

[0044] As shown in FIGS. 5 to 7, the burner ring 50 has an annular pressing portion 51 and an annular rib 52. The rib 52 protrudes downward from the outer peripheral end of the burner ring 50. The pressing portion 51 is located more inward than the rib 52. The outer peripheral edge of the pressing portion 51 is connected to the inner peripheral edge of the rib 52. The radial width of the pressing portion 51 is set to be approximately equal to the radial width of the first seal portion 41 or to be larger by a predetermined amount than the radial width of the first seal portion 41 so that the pressing portion 51 can press the entire first seal portion 41. The radial width of the rib 52 is set to be approximately equal to the radial width of the second seal portion 42. As shown in FIGS. 2 and 4, a pair of notches 53 are also formed at the outer peripheral end of the burner ring 50. In addition, three female screw holes 54 (see FIG. 5) are formed on the lower surface (back surface) of the burner ring 50.

[0045] As shown in Figures 6 and 7, the lower surface of the pressing portion 51 of the burner ring 50 and the upper surface of the first seal portion 41 of the seal member 40 are in contact with each other. The first seal portion 41 is pressed downward by the pressing portion 51 and compressed by a predetermined amount between the pressing portion 51 and the top plate 20. The compression rate of the first seal portion 41 is set to about 5%. On the other hand, the lower surface of the rib 52 of the burner ring 50 and the upper surface of the second seal portion 42 of the seal member 40 are not in contact with each other. In other words, a predetermined gap G (see Figure 7) is provided between the lower end surface of the rib 52 and the upper end surface of the second seal portion 42.

[0046] 5 and 6, a hanging portion 55 extending downward in part of the circumferential direction is formed at the inner peripheral end of the burner ring 50. This hanging portion 55 is inserted into the gap between the burner body 31 of the gas burner 30 and the burner opening 23 of the top plate main body 21 and the insertion hole 26 of the heat sink 22. In addition, the central opening 50a of the burner ring 50 is located on the outer periphery of the vertical cylindrical portion 31a of the burner body 31, and a small gap C is provided between the inner peripheral surface of the central opening 50a and the outer peripheral surface of the vertical cylindrical portion 31a.

[0047] The seal ring 70 is made of heat-resistant rubber such as silicone rubber or fluororubber, and has an annular shape. The ring body 80 is made of metal such as stainless steel, and has an annular shape. As shown in Figures 4 and 5, the ring body 80 has three screw holes 81 formed therein. The seal ring 70 may be made of heat-resistant rubber, or may be made of other heat-resistant materials such as heat-resistant resin or graphite.

[0048] The burner ring 50 and other components are attached to the top plate 20 as follows. As shown in Fig. 5, with the top plate 20 sandwiched between them, the seal member 40 and burner ring 50 are arranged on the top plate main body 21 side, and the seal ring 70 and ring body 80 are arranged on the heat sink 22 side. With these components in this state, screws 90 are inserted into the screw holes 81 of the ring body 80, and the screws 90 are fastened to the female threaded holes 54 of the burner ring 50. As a result, the burner ring 50 and ring body 80 are held on the top plate 20 with the opening periphery 24 of the top plate 20 sandwiched between them from above and below, with the seal member 40 and seal ring 70 interposed between them.

[0049] Here, the inner diameter of the inner peripheral edge of the burner ring 50, i.e., the inner diameter of the central opening 50a, is set slightly larger than the outer diameter of the vertical cylindrical portion 31a of the burner body 31 of the gas burner 30. Furthermore, the gap between the burner opening 23 of the top plate main body 21 and the burner body 31 of the gas burner 30, and the gap between the insertion hole 26 of the heat sink 22 and the burner body 31 of the gas burner 30 are set so that the hanging portion 55 of the burner ring 50 inserted into these gaps can move a predetermined amount in the horizontal direction. The clamping force between the burner ring 50 and the ring body 80 is set so that the burner ring 50 and the ring body 80 can move along the top plate 20 by a predetermined operating force on the burner ring 50, etc. This makes it possible to fine-tune the mounting position of the burner ring 50 and ensure concentricity with the gas burner 30 by moving the burner ring 50 and the ring body 80 relative to the top plate 20 in accordance with the mounting position of the gas burner 30 in the appliance body 10.

[0050] As shown in Figure 4, the trivet 60 has an annular frame 61, claws 62, and a pair of locking projections 63. The claws 62 support the cooking vessel 7. The locking projections 63 protrude radially inward from opposing positions on the inner circumferential surface of the frame 61. The trivet 60 is positioned by the locking projections 63 engaging with the notches 43 of the seal member 40 and the notches 53 of the burner ring 50.

[0051] In this cooking device 1, the thick first seal portion 41 of the sealing member 40 is compressed by the pressing portion 51, which is located more inward than the rib 52 of the burner ring 50 and has less distortion, thereby reducing the effect of variations in the pressing force during compression on the compression rate and reducing variations in the pressing force acting from the pressing portion 51 on the first seal portion 41.

[0052] Furthermore, in this cooking appliance 1, a gap G is provided between the lower surface of the rib 52 and the upper surface of the second seal portion 42. This is advantageous in preventing the rib 52 from coming into contact with the second seal portion 42 due to distortion of the burner ring 50, and in preventing the pressing force acting from the rib 52 on the second seal portion 42 from becoming excessive when the rib 52 and the second seal portion 42 come into contact with each other.

[0053] Furthermore, in this cooking device 1, the wide first seal portion 41 of the seal member 40 is compressed, so that the sealing performance of the first seal portion 41 can be easily stabilized.

[0054] This makes it possible to prevent variations in sealing performance in the first sealing portion 41 compressed by the pressing portion 51, and ensure stable sealing performance between the upper surface of the top plate 20 and the burner ring 50. As a result, the first sealing portion 41 can ensure suitable sealing performance against liquids such as broth and detergent.

[0055] Therefore, in this cooking device 1, the sealing performance of the sealing member 40 can be stabilized.

[0056] Furthermore, in this cooking device 1, the tolerance for distortion is increased in the manufacture of the burner ring 50, so that the productivity of the burner ring 50 can be improved.

[0057] Furthermore, in this cooking appliance 1, the seal member 40 is made of PTFE, so that the mounting position of the burner ring 50 together with the ring body 80 can be easily adjusted while the pressing portion 51 is brought into sliding contact with the first seal portion 41 in accordance with the position of the gas burner 30, thereby improving the ease of mounting the burner ring 50. Furthermore, compared to seal members made of rubber, which is prone to bending, the seal member 40 made of PTFE has a stable shape and is therefore easier to assemble.

[0058] Furthermore, the burner ring 50 of this cooking device 1 is a cast product, which also contributes to excellent productivity. On the other hand, in the burner ring 50 which is a cast product, distortion is likely to increase at the rib 52 at the outer peripheral end, but stable sealing can be preferably ensured by the first seal portion 41 pressed by the pressing portion 51.

[0059] Furthermore, in this cooking appliance 1, the second seal portion 42 is disposed in the gap between the rib 52 of the burner ring 50 and the top plate 20, making it difficult for small foreign objects to become caught in this gap. Also, since the gap is filled with the second seal portion 42, the design is improved.

[0060] Example 2 As shown in FIG. 8, in the second embodiment, the second seal portion 44 of the seal member 40 is thicker than the second seal portion 42 in the first embodiment by a predetermined amount.

[0061] Specifically, the lower surface of the rib 52 of the burner ring 50 abuts against the upper surface of the second seal portion 44. The second seal portion 44 is compressed between the rib 52 and the top plate 20. The first compression amount of the first seal portion 41 compressed between the pressing portion 51 and the top plate 20 is set to be larger by a predetermined amount than the second compression amount of the second seal portion 44.

[0062] This allows the gap between the top plate 20 and the burner ring 50 to be sealed not only by the first seal portion 41 but also by the second seal portion 44, thereby improving the sealing performance between the top plate 20 and the burner ring 50.

[0063] Furthermore, since the thick first seal portion 41 is compressed by a large first compression amount, variations in the pressing force acting on the first seal portion 41 can be suitably absorbed, and the sealing performance of the first seal portion 41 can be effectively stabilized.

[0064] The other configurations and effects are the same as those of the first embodiment.

[0065] The present invention has been described above in accordance with Examples 1 and 2, but it goes without saying that the present invention is not limited to the above Examples 1 and 2, and can be modified and applied as appropriate within the scope of the invention.

[0066] In Examples 1 and 2, the burner ring 50 and the ring body 80 are fastened together, and the burner ring 50 and the ring body 80 are made movable relative to the top plate 20, allowing for fine adjustment of the mounting position of the burner ring 50 relative to the top plate 20. However, this is not limiting, and the burner ring 50 may be made movable relative to the top plate 20 by other mounting methods, or the burner ring 50 may be fixed to the top plate 20 so as to be immovable.

[0067] In Examples 1 and 2, the material of the seal member 40 is PTFE, but the present invention is not limited to this. The material of the seal member may be a fluororesin other than PTFE, or other resin or rubber that has excellent heat resistance, chemical resistance, etc.

[0068] In the first and second embodiments, the material of the table top body 21 is glass, but the present invention is not limited to this. The material of the table top body may be a metal such as stainless steel.

[0069] In the first and second embodiments, the burner ring 50 is an aluminum die-cast product, but the present invention is not limited to this. The burner ring may be a forged brass product, a stainless steel product, or the like.

[0070] In the first and second embodiments, the number of gas burners 30 is three, but the present invention is not limited to this. The number of gas burners may be one, two, or four or more. Furthermore, some of the multiple gas burners may be electromagnetic induction heating units equipped with IH coils.

[0071] In Example 2, the second seal portion 44 is compressed by the rib 52 to a second compression amount, but the present invention is not limited to this, and the rib 52 may abut against the second seal portion, but the second seal portion may not be compressed by the rib 52. [Industrial Applicability]

[0072] The present invention can be used, for example, in kitchens in homes and kitchen equipment in facilities. [Explanation of symbols]

[0073] 1...Heating cooker 7...Cooking container (item to be heated) 20...Tabletop 23...Burner opening 24...Opening periphery 30...Gas burner 40...Sealing member 41...First seal part 42, 44...Second seal part 50...Burnering 51...Pressing part 52...Rib S...gap G...Void

Claims

1. a gas burner that burns fuel gas to heat an object to be heated; a top plate having a burner opening through which the gas burner is inserted; a burner ring that covers a gap between the gas burner and the burner opening and is disposed above a peripheral edge of the burner opening in the top plate; a ring-shaped seal member interposed between the upper surface of the top plate and the burner ring, The burner ring includes an annular rib protruding downward from an outer peripheral end of the burner ring; an annular pressing portion located more inward than the rib; The seal member includes an annular first seal portion and a second seal portion having an annular shape and positioned more outer than the first seal portion and thinner than the first seal portion; the first seal portion is disposed between the pressing portion and the top plate, and is pressed downward by the pressing portion to be compressed between the pressing portion and the top plate; The cooking device, wherein the second seal portion is disposed between the rib and the top plate.

2. The cooking device according to claim 1 , wherein a gap is provided between the lower surface of the rib and the upper surface of the second seal portion.

3. the rib and the second seal portion are in contact with each other, The cooking device according to claim 1, wherein when the second seal portion is compressed between the rib and the top plate, a first compression amount in the first seal portion is greater than a second compression amount in the second seal portion.

4. The cooking device according to claim 1 , wherein a radial width of the first seal portion is greater than a radial width of the second seal portion.

5. The burner ring is held movably relative to the top plate, The cooking device according to claim 1 , wherein the sealing member contains a fluororesin.

6. 4. The cooking device according to claim 1, wherein the burner ring is a casting.

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