Heating regulator

Abstract

To evenly heat a bottom wall of a cooker by a burner and accurately detect temperature of the bottom wall of the cooker by a temperature detection unit.SOLUTION: A burner includes: a first burner portion 51 having a first burner port row 120 where a plurality of burner ports 121 are arranged in parallel in a front and rear direction or a right and left direction of a heating chamber 20; and a second burner portion 52 having a second burner port row 220 where a plurality of burner ports 221 are arranged in parallel in an arranging direction same as the first burner port row 120. The first burner portion 51 and the second burner portion 52 are arranged in such a manner that the first burner port row 120 and the second burner port row 220 are arranged a prescribed distance apart in parallel with a first temperature detecting means 60 interposed between them. A first facing area burner port 122 and a second facing area burner port 222 provided in areas 140, 240 facing the first temperature detecting means 60 are formed in such a manner that combustion flame does not extend toward the first temperature detecting means 60.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a cooking device having a burner that heats cooking utensils housed in a heating chamber from below. [Background technology]

[0002] A grill has been proposed in the past that includes a roughly rectangular box-shaped grill chamber that houses cooking utensils such as a grill plate and cooking vessels, an annular burner with a ring of flame holes arranged in the bottom of the grill chamber, and a temperature detector located in the center of the ring of flame holes (see, for example, Patent Document 1). In this type of grill, when a cooking utensil is placed inside the grill chamber, the temperature detector abuts against the bottom wall of the cooking utensil. Therefore, the temperature detector detects the temperature of the bottom wall of the cooking utensil, while the annular burner heats the bottom wall of the cooking utensil from below, allowing the food to be cooked.

[0003] However, because the combustion flame formed by the annular burner is circular, in order to heat the central portion of the bottom wall of a cooking utensil such as a rectangular grill plate, only an annular burner with a diameter sufficiently smaller than the size of the bottom wall of the cooking utensil can be installed, which makes it difficult to heat the peripheral portion of the bottom wall of the cooking utensil compared to the central portion, resulting in uneven heating.

[0004] Patent Document 1 also proposes a burner with a linear row of flame holes aligned along the side wall of the grill chamber. However, in order to heat the bottom wall of a cooking utensil from below using a burner with a linear row of flame holes aligned along the side wall of the grill chamber, the flame holes must be open toward the inside of the grill chamber. Therefore, if a temperature detection unit is provided at the bottom of the grill chamber, the temperature detection unit is susceptible to the influence of the combustion flame extending from the flame holes toward the inside of the grill chamber, resulting in the problem of being unable to accurately detect the temperature of the bottom wall of the cooking utensil. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2016-22331 Summary of the Invention [Problem to be solved by the invention]

[0006] The present invention solves the above-mentioned problems, and its object is to provide a heating cooker having a heating chamber equipped with a burner that heats the bottom wall of a cooking utensil and a temperature detection unit that detects the temperature of the bottom wall of the cooking utensil, in which the burner heats the bottom wall of the cooking utensil evenly and the temperature detection unit accurately detects the temperature of the bottom wall of the cooking utensil. [Means for solving the problem]

[0007] According to the present invention, a heating chamber having a substantially rectangular box-shaped heating chamber with an opening that opens forward and that can accommodate cooking utensils for heating and cooking food, and a front door that opens and closes the opening; a burner positioned below the cooking utensil when the cooking utensil is housed in the heating chamber and heating the cooking utensil from below; A cooking device having a first temperature detection means that is in contact with a bottom wall of the cooking device and detects the temperature of the bottom wall of the cooking device, The burner has a first burner section having a first row of flame holes in which a plurality of flame holes are arranged in the front-rear direction or the left-right direction of the heating chamber, and a second burner section having a second row of flame holes in which a plurality of flame holes are arranged in the same arrangement direction as the first row of flame holes, the first burner section and the second burner section are arranged such that the first row of burner holes and the second row of burner holes are arranged in parallel at a predetermined distance with the first temperature detection means therebetween; Among the plurality of flame holes in the first flame hole row of the first burner section, the first opposing area flame holes provided in the first opposing area of ​​the first burner section opposing the first temperature detection means are formed so that the combustion flame does not extend toward the first temperature detection means, A cooking device is provided in which, among the multiple flame holes in the second flame hole row of the second burner section, the second opposing area flame hole provided in the second opposing area of ​​the second burner section facing the first temperature detection means is formed so that the combustion flame does not extend toward the first temperature detection means.

[0008] According to the cooking appliance described above, the burner, which is positioned below the cooking appliance when the cooking appliance is placed in the heating chamber and heats the cooking appliance from below, has a first burner section with a first row of flame holes arranged in the front-to-back or left-to-right direction of the heating chamber, and a second burner section with a second row of flame holes arranged in the same direction as the first row of flame holes, so that the bottom wall of the cooking appliance can be heated over a wider area than when an annular burner is used. This reduces uneven heating of the bottom wall of the cooking appliance and allows the bottom wall of the cooking appliance to be heated evenly.

[0009] In the cooking device described above, the first burner unit and the second burner unit are arranged in parallel with the first and second burner hole rows spaced a predetermined distance apart with the first temperature detecting means sandwiched therebetween, but among the plurality of burners in the first burner hole row of the first burner unit, the first opposing area burner hole provided in the first opposing area of ​​the first burner unit facing the first temperature detecting means is formed so that the combustion flame does not extend toward the first temperature detecting means, and among the plurality of burners in the second burner hole row of the second burner unit, the second opposing area burner hole provided in the second opposing area of ​​the second burner unit facing the first temperature detecting means is formed so that the combustion flame does not extend toward the first temperature detecting means, so that the first temperature detecting means is not easily affected by the combustion flame formed in the first opposing area burner hole and the second opposing area burner hole, thereby enabling accurate detection of the temperature of the bottom wall of the cooking device.

[0010] Preferably, in the cooking device, the first opposing area flame hole is formed so that the combustion flame extends within a range from above the first burner unit on the inner side to a first side wall of the heating chamber located on the opposite side of the first temperature detection means on the outer side, The second opposing area flame hole is formed so that the combustion flame extends within a range from above the second burner section on the inner side to the second side wall of the heating chamber located on the opposite side of the first temperature detection means on the outer side.

[0011] According to the above-mentioned cooking device, the first opposing area flame hole provided in the first opposing area of ​​the first burner section facing the first temperature detection means is formed so that the combustion flame extends from above the first burner section on the inward side toward the first side wall of the heating chamber located on the opposite side of the first temperature detection means on the outward side, and the second opposing area flame hole provided in the second opposing area of ​​the second burner section facing the first temperature detection means is formed so that the combustion flame extends from above the second burner section on the inward side toward the second side wall of the heating chamber located on the opposite side of the first temperature detection means on the outward side.Therefore, the bottom wall of the cooking utensil can be uniformly heated by the combustion flames formed in the first opposing area flame hole, second opposing area flame hole and other flame holes while preventing the combustion flames formed in the first opposing area flame hole and second opposing area flame hole from affecting the first temperature detection section.

[0012] Preferably, the cooking device further comprises: The heating chamber has a second temperature detection means for detecting the temperature above the cooking utensils housed in the heating chamber.

[0013] The cooking device described above can detect the temperature of the top surface of the bottom wall of the cooking utensil and the temperature of the food being cooked, thereby improving cooking efficiency and enabling quick response when an abnormality occurs.

[0014] Preferably, in the cooking device, The first burner section and the second burner section are composed of independent first and second burners.

[0015] According to the cooking device, the first burner and the second burner can be made smaller, which improves the ease of handling these burners during assembly, and also improves the ease of maintenance when a problem occurs with either burner.

[0016] Preferably, in the cooking device, The first burner and the second burner are configured so that the supply amounts of fuel gas are controlled independently.

[0017] The cooking device described above can widen the range of heat amounts that can be applied to the cooking utensil. Also, since a temperature difference can be created on the cooking utensil, different cooking methods can be performed using one cooking utensil.

[0018] Preferably, in the cooking device, The first burner section has a first upper wall section that is convex upward and has a generally triangular cross section, The second burner section has a second upper wall section that is convex upward and has a generally triangular cross section, the plurality of burner holes in the first burner section's first burner hole row are open to the first upper wall portion and comprise slit-shaped burner holes that are long in a direction intersecting the arrangement direction of the first burner hole row; the plurality of burner holes in the second burner hole row of the second burner section are open to the second upper wall portion and are slit-shaped burner holes that are long in a direction intersecting the arrangement direction of the second burner hole row, The first opposing area flame holes are open in a range from the outer slope of the first upper wall portion to the ridge line, The second opposing area burner holes are open in a range from the outer slope of the second upper wall portion to the ridge line.

[0019] In the above-mentioned cooking appliance, the plurality of flame holes in the first row of flame holes of the first burner unit open into the first upper wall unit having a generally triangular cross section and a convex upward shape, and are slit-shaped flame holes that are long in a direction intersecting the arrangement direction of the first row of flame holes, and the plurality of flame holes in the second row of flame holes of the second burner unit open into the second upper wall unit having a generally triangular cross section and are slit-shaped flame holes that are long in a direction intersecting the arrangement direction of the second row of flame holes, so that the cooking appliance can be heated uniformly from the central portion in the front-rear and left-right directions to the peripheral portions in the front-rear and left-right directions.Furthermore, in the above-mentioned cooking appliance, the first opposing area flame holes open in a range from the outer slope of the first upper wall unit to the ridgeline, so that the combustion flame formed in the first opposing area flame holes extends from above the first burner unit on the inward side to diagonally upward and outward on the outward side. Furthermore, because the second opposing area flame hole is open in the range from the outer slope of the second upper wall portion to the ridgeline, the combustion flame formed in the second opposing area flame hole extends from above the second burner portion on the inner side to diagonally upward and outward on the outer side, thereby effectively preventing the combustion flame formed in the first opposing area flame hole and the second opposing area flame hole from affecting the first temperature detection unit. [Effects of the Invention]

[0020] As described above, according to the present invention, in a cooking device having a heating chamber equipped with a burner for heating the bottom wall of a cooking utensil and a temperature detector for detecting the temperature of the bottom wall of the cooking utensil, the burner can heat the bottom wall of the cooking utensil evenly, and the temperature detector can accurately detect the temperature of the bottom wall of the cooking utensil, thereby improving the cooking performance of cooking. [Brief explanation of the drawings]

[0021] [Figure 1] FIG. 1 is a schematic perspective view showing an example of a gas stove according to a first embodiment of the present invention. [Figure 2] FIG. 2 is a schematic cross-sectional view of the gas stove according to the first embodiment of the present invention as viewed from the front. [Figure 3] FIG. 3 is a schematic perspective view of a main part showing a part around the grill of the gas stove according to the first embodiment of the present invention. [Figure 4] FIG. 4 is a schematic plan view of a main part showing the first burner, the second burner, and the first temperature sensor according to the first embodiment of the present invention. [Figure 5] Figure 5 is a cross-sectional schematic diagram illustrating an example of the state of a combustion flame formed in the first burner according to embodiment 1 of the present invention, where Figure 5(a) shows the state of a combustion flame formed in the first non-opposing area flame hole, and Figure 5(b) shows the state of a combustion flame formed in the first opposing area flame hole. [Figure 6] FIG. 6 is a block diagram of the gas stove according to the first embodiment of the present invention. [Figure 7] FIG. 7 is a schematic perspective view of a main part showing a part around a grill of a gas stove according to the second embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0022] (Embodiment 1) A grill, which is an example of a cooking device according to an embodiment of the present invention, will be described in detail below with reference to the drawings. Note that in each drawing, the dimensions and scale of each part are appropriately different from the actual ones, and some components are omitted to avoid complication.

[0023] As shown in Figure 1, the grill 2 in this embodiment is integrally formed with the stove body 10 of a gas stove 1 having one or more stove burners 11 on the upper surface of the top plate 9, and the stove body 10 forms the outer shell of the grill 2.

[0024] As shown in FIGS. 1 to 3 , grill 2 includes a heating chamber 250 having a substantially rectangular box-shaped heating chamber 20 that houses a shallow grill plate 80, a cooking utensil on which food ingredients such as meat or fish are placed, and a front door 5 that opens and closes an opening 200 that opens forward and serves as an opening for loading and unloading food ingredients into and from heating chamber 20. Although not shown, a connecting plate extends toward the bottom rear surface of front door 5 toward the interior of heating chamber 20, and a support frame 300 that supports grill plate 80 from below is connected to the connecting plate. By pulling front door 5 forward, grill plate 80 is pulled forward along with support frame 300 from heating chamber 20, and by pushing front door 5 rearward, grill plate 80 is housed within heating chamber 20 along with support frame 300. Usable cooking utensils include a shallow grill plate having a substantially rectangular bottom wall elongated in the front-to-rear direction or a substantially square bottom wall with substantially the same length in the front-to-rear and left-to-right directions, a shallow or deep cooking vessel, a pizza plate, a toast plate, a Dutch oven, etc. In this specification, the surface on which the front door 5 is provided is referred to as the front, the direction in which the front door 5 faces the rear side of the heating cabinet 20 when viewed from the front door 5 side is referred to as the front-to-back direction, the width direction of the heating cabinet 20 is referred to as the left-to-right direction, and the height direction of the heating cabinet 20 is referred to as the up-to-down direction.

[0025] The operation section formed on the left side of the front door 5 is provided with a grill switch 41, which has the functions of turning on / off the upper burner and the first and second burners, as well as adjusting the flame power, as well as an operation unit 40 below it. The operation unit 40 is configured so that the user can operate it by pressing and operating the front panel 401 below the operation section, which allows it to be pulled out toward the user. The operation unit 40 is provided with individual switches that have the functions of turning on / off the first and second burners individually and adjusting the flame power.

[0026] 2, an exhaust opening 30 is provided in the upper part of the rear wall 25 of the heating chamber 20. Although not shown, the exhaust opening 30 extends diagonally upward and rearward and communicates with an exhaust duct that is connected to an opening in the top plate 9.

[0027] An upper-fire burner 56 is provided on the upper wall 24 of the heating chamber 20 to heat the food to be cooked from above. The upper-fire burner 56 is, for example, a surface-combustion ceramic burner with a ceramic plate on the underside, and flame holes 560 are opened on the underside of the plate. Therefore, when fuel gas and primary air are supplied from a mixing tube (not shown) and the upper-fire burner 56 is ignited, a combustion flame of the fuel gas is formed on the underside of the plate, and the radiant heat and combustion exhaust are radiated downward inside the heating chamber 20.

[0028] A pair of rod-shaped burners, a first burner 51 and a second burner 52, extending in the front-rear direction, are arranged in the left-right center of the lower region of the heating chamber 20. The first and second burners 51, 52 are independent members, and when the grill plate 80 is housed in the heating chamber 20, the first and second burners 51, 52 are provided so as to be positioned approximately symmetrically below the left-right center of the grill plate 80. Therefore, in this embodiment, the first and second burners 51, 52 constitute burners that heat the cooking utensils from below, the first burner 51 constitutes the first burner section, and the second burner 52 constitutes the second burner section.

[0029] As shown in Figure 3, the first and second burners 51, 52 each have a first burner body 51A and a second burner body 52A, which are flat, generally rectangular, and longitudinal in the front-to-rear direction. The first and second burner bodies 51A, 52A are each fixed to the bottom wall 23 of the heating chamber 20 with their short sides extending generally horizontally. By arranging the flat first and second burners 51, 52 horizontally in this manner, the overall vertical height of the grill 2 can be reduced, resulting in a compact grill 2. Furthermore, because the space required for the first and second burners 51, 52 can be reduced, even in a small-sized heating chamber 20, a certain amount of space can be secured within the heating chamber 20 to accommodate the grill plate 80. Since the first and second burners 51, 52 have the same configuration except that they are approximately symmetrical, the configuration of each burner and its surroundings will be explained mainly using the first burner 51 on the left side when viewed from the front as an example, and the configuration of the second burner 52 will be omitted and will be given a reference number similar to that of the first burner 51.

[0030] The first burner body 51A of the first burner 51 is manufactured, for example, by drawing or pressing two flat metal plates punched into a predetermined shape, punching one of the metal plates to form a burner hole, overlapping the two metal plates at a predetermined location so that they face each other with a gap between them, and welding or caulking the peripheral edges to join them. Therefore, in this embodiment, when the first burner 51 is installed in the heating chamber 20, one metal plate located on the upper side forms the first upper wall portion 101 of the first burner body 51A, and the other metal plate located on the lower side forms the first lower wall portion 102 of the first burner body 51A. Note that the first burner body 51A may also be manufactured by folding a single metal plate processed into a predetermined shape along a folding line that defines the left or right edge of the first burner body 51A so that the two plates are folded together.

[0031] The first upper wall 101 of the first burner body 51A has a first upper bulge 103 in the left-right center that bulges upward from the rear end to near the front end. The first upper bulge 103 has a first non-flame hole bulge 111 on the rear side that bulges upward in a generally semicircular shape in left-right cross section, and a first flame hole bulge 112 on the front side that bulges upward in a generally triangular shape in left-right cross section. The first upper wall 101 also has a first upper flange 104 that extends left-right and forward from the periphery of the first upper bulge 103. The portion of the first burner port expansion section 112 that bulges upward and has a generally triangular shape in left-right cross section is composed of a first left inclined surface section 131 (outer inclined surface section) located on the outer side and sloping diagonally upward inward from the left, and a first right inclined surface section 132 (inner inclined surface section) located inward of the first left inclined surface section 131 and sloping diagonally downward inward from the left, with a ridge line 133 formed between the first left inclined surface section 131 and the first right inclined surface section 132 (see Figures 4 and 5). The first burner port expansion section 112 has a plurality of burner ports 121 arranged side by side at a predetermined interval in the front-rear direction. These burner ports 121 therefore constitute a first burner port row 120. As described above, in this embodiment, the grill plate 80 can be heated from below by the plurality of flame holes 121 of the first flame hole row 120, which are arranged linearly in the front-to-rear direction, and the bottom wall 81 of the grill plate 80 can be heated over a wide area from the center in the front-to-rear direction to the periphery in the front-to-rear direction. In the second burner 52, similar to the first burner 51, the second right inclined surface 231 located on the outer side corresponds to the outer inclined surface, and the second left inclined surface 232 located on the inner side corresponds to the inner inclined surface, and a ridge line 233 is formed between the second right inclined surface 231 and the second left inclined surface 232 (see FIG. 4 ). The second flame hole row 220 also has a plurality of flame holes 221 arranged in the same arrangement direction as the plurality of flame holes 122 of the first flame hole row 120, and the first flame hole row 120 and the second flame hole row 220 are arranged side by side in the left-to-right direction.

[0032] As shown in FIG. 2, the first lower wall portion 102 has a first lower bulging portion 105 in its left-right central portion, which bulges downward in a generally semi-elliptical shape in left-right cross section from the rear end to the vicinity of the front end. The first lower wall portion 102 also has a first lower flange portion 106 extending in the left-right and forward directions from the periphery of the first lower bulging portion 105. The first lower bulging portion 105 and the first lower flange portion 106 are formed in positions facing the first upper bulging portion 103 and the first upper flange portion 104, respectively, when the first upper wall portion 101 and the first lower wall portion 102 are overlapped. The first lower flange portion 106 is formed slightly larger in the left-right and forward directions than the first upper flange portion 104, and multiple folded pieces are formed around the periphery of the first lower wall portion 102 (see FIGS. 3 and 4). Therefore, with the first upper wall portion 101 and the first lower wall portion 102 overlapping each other, the bent pieces on the periphery of the first lower wall portion 102 are bent upward and the periphery of the first upper wall portion 101 is crimped, thereby joining the first upper wall portion 101 and the first lower wall portion 102 together. In addition, notches are formed between adjacent bent pieces at the front and rear. These notches are fitted with the claws of an electrode fixing member and a thermocouple fixing member for fixing an ignition electrode and a thermocouple, which will be described later.

[0033] When the first upper wall portion 101 and the first lower wall portion 102 are joined facing each other, the first upper bulging portion 103 and the first lower bulging portion 105 cause the first upper wall portion 101 and the first lower wall portion 102 to face each other with a gap between them. Except for these bulging portions, the first upper flange portion 104 and the first lower flange portion 106 are in surface contact, and their peripheral edges are closed ends. As a result, the first upper bulging portion 103 and the first lower bulging portion 105 form a gas inlet port that opens rearward at the rear end.

[0034] Although not shown, a nozzle for supplying fuel gas is inserted into the gas inlet. The opening area of ​​the gas inlet is formed to be sufficiently larger than that of the tip opening of the nozzle, and external air is supplied to the first burner 51 as primary air together with the fuel gas ejected from the nozzle. Therefore, when fuel gas is introduced into the first burner body 51A from the gas inlet, a substantially linear gas passage is defined within the first burner body 51A that guides the air-fuel mixture supplied from the gas inlet to the first flame hole row 120.

[0035] As shown in Figures 3 and 4, each of the burner holes 121 in the first burner hole row 120 in the first upper wall portion 101 of the first burner 51 opens as a longitudinal slit in the left-right direction, which intersects with the front-rear direction, which is the arrangement direction of the first burner hole row 120. Furthermore, within the first burner hole row 120, the burner holes 122 (hereinafter referred to as "first facing region burner holes") in a region 140 facing the first temperature sensor 60 of the first burner 51 (hereinafter referred to as the "first facing region") and the burner holes 123 (hereinafter referred to as "first non-facing region burner holes") in a region 141 other than the first facing region 140 (hereinafter referred to as the "first non-facing region") have different left-right slit lengths. Specifically, as shown in Figure 5(a), the first non-facing region burner holes 123 in the first non-facing region 141 open from the first right inclined surface portion 132 on the inward side, across the ridge line 133, and to the first left inclined surface portion 131 on the outward side. As a result, the combustion flame formed in the first non-opposing area flame hole 123 extends within a range from diagonally upward inward on the inner side to diagonally upward outward on the outer side. This allows the bottom wall 81 of the grill plate 80 to be heated over a wide area, from the left-right center to the left-right peripheral edges. Furthermore, interference between the combustion flame formed in the first non-opposing area flame hole 123 and the combustion flame formed in the second non-opposing area flame hole 223 can be reduced. The left-right opening range of the first non-opposing area flame hole 123 can be set appropriately depending on the size of the grill plate 80 and the shape of the first burner 51, but considering the spread of the combustion flame, it should extend from the left-right center of the first right inclined surface portion 132 on the inner side, across the ridge line 133, and to the left end of the first left inclined surface portion 131 on the outer side. As a result, the combustion flame formed in the first non-opposing area flame hole 123 of the first flame hole row 120 is formed to extend within a range from an inward diagonal upward direction on the inward side to the direction of the left side wall 21 (first side wall) of the heating chamber 20 on the outward side.

[0036] 5(b), the first opposing area flame holes 122 in the first opposing area 140 open from the center in the left-right direction of the first left inclined surface portion 131 on the outer side to the ridge line 133. Therefore, the combustion flame formed in these first opposing area flame holes 122 extends from the upper direction on the inner side toward the diagonally upward and outward direction on the outer side. This prevents the combustion flame formed in the first opposing area flame holes 122 from affecting the first temperature sensor 60. Furthermore, because the combustion flame formed in the first opposing area flame holes 122 extends from the upper direction on the inner side toward the diagonally upward and outward direction on the outer side, there are no gaps in the combustion flame in the first flame hole row 120, and the first burner 51 can uniformly heat the left half region of the bottom wall 81 of the grill plate 80. The left-right opening range of first opposing area flame hole 122 can be set appropriately depending on the size of grill plate 80 and the shape of first burner 51, but considering the spread of the combustion flame, it is from ridge line 133 on the inner side to the left end of first left inclined surface portion 131 on the outer side. As a result, the combustion flame formed in first opposing area flame hole 122 is formed to extend within a range from the upper direction on the inner side to the direction of left side wall 21 (first side wall) of heating chamber 20 on the outer side.

[0037] The first burner 51 is disposed such that, when the grill plate 80 is housed in the heating chamber 20, the first burner hole row 120 is positioned in the front-rear direction from a portion forward of the rear end of the grill plate 80 to a portion rearward of the front end of the grill plate 80. Preferably, the front-rear length La of the first burner hole row 120 is 0.4L or more of the front-rear length L of the grill plate 80, and more preferably 0.5L or more and 0.7L or less. This allows a wide range of heating to be achieved, from the center of the grill plate 80 in the front-rear and left-right directions to the periphery, while preventing the generation of oil smoke from the oil puddle, even when an oil pool is formed on the periphery of the grill plate 80 in the front-rear and left-right directions. Preferably, the first burner 51 is disposed such that the center of the first burner hole row 120 is positioned forward of the center of the grill plate 80 in the front-rear direction. This allows the grill plate 80 to be heated uniformly even when the combustion flame formed in the burner holes 121 of the first burner hole row 120 flows backward due to the draft effect of the combustion exhaust gas being discharged backward.

[0038] The spacing between the flame holes 121 in the first flame hole row 120 can be set as appropriate depending on the size of the grill plate 80 and the corresponding size of the first burners 51, but is preferably 0.2 mm to 0.7 mm. The length of the long side in the left-right direction of the slits of the first non-opposing area flame holes 123 is preferably 3 mm to 7 mm, the length of the short side in the front-to-rear direction is preferably 1 mm to 2 mm, and the long side / short side ratio is 1.5 to 7. The length of the long side in the left-to-right direction of the slits of the first opposing area flame holes 122 is preferably 3 mm to 5 mm, the length of the short side in the front-to-rear direction is preferably 1 mm to 2 mm, and the long side / short side ratio is 1.5 to 5.

[0039] Next, the overall configuration of the heating chamber 250 will be described. As shown in FIGS. 2 to 4, the first burner 51 and the second burner 52 are arranged below the left-right center of the grill plate 80, spaced a predetermined distance apart in the left-right direction. When the first burner 51 and the second burner 52 are arranged symmetrically about the left-right center line of the grill plate 80, the separation distance Wa between the inner ends of the flame holes 121 of the first flame hole row 120 and the inner ends of the flame holes 221 of the second flame hole row 220 is preferably 0.5W or less of the left-right width W of the grill plate 80, and more preferably 0.05W or more and 0.3W or less. This allows the left-right center of the grill plate 80 to be heated to the highest temperature, and food placed in the left-right center of the grill plate 80 can be cooked at a high temperature.

[0040] A first temperature sensor 60 (first temperature detection means) having a cylindrical head is installed in the gap between the first burner 51's first flame hole row 120 and the second burner 52's second flame hole row 220. The first temperature sensor 60 has a heat-sensing part on the inner surface of the upper end of the head, and the head abuts against the underside of the bottom wall 23 at the center of the grill plate 80 in the front-to-back and left-to-right directions to detect the temperature of the bottom wall 81 of the grill plate 80. The heat-sensing part of the first temperature sensor 60 is composed of, for example, a thermocouple or a thermistor. As described above, when the first temperature sensor 60 is disposed in the gap between the first burner 51 and the second burner 52, the first and second opposing area flame holes 122, 222 are located in the first and second opposing areas 140, 240 facing the first temperature sensor 60. First temperature sensor 60 is supported so as to be able to move up and down freely within heating chamber 20 by a biasing means (not shown), and is configured so as to be pushed down by the weight of grill plate 80 when grill plate 80 is accommodated in a predetermined position within heating chamber 20. First temperature sensor 60 is connected to a control device (described later), and a detection signal from first temperature sensor 60 is input to the control device.

[0041] As shown in FIGS. 2 and 3 , near both left and right ends of the top surface of the bottom wall 23 of the heating chamber 20, protruding upwardly are formed protruding portions 88 of a constant width in the left-right direction and a constant length in the front-to-rear direction. Although not shown, when the front door 5 is closed with the grill plate 80 placed on the support frame 300 that supports the grill plate 80 from below, both left and right ends of the rear frame of the support frame 300 ride up on the protruding portions 88, thereby lifting the rear portion of the grill plate 80 upward. This allows the grill plate 80 to move rearward without colliding with the first temperature sensor 60. Then, as the front door 5 is further closed and the rear frame of the support frame 300 rides over the protruding portions 88, the support frame 300 assumes a substantially horizontal position. Accordingly, the first temperature sensor 60 is pushed downward, and the upper end of the head of the first temperature sensor 60 (the heat-sensing unit) abuts against the underside of the bottom wall 81 of the substantially horizontal grill plate 80.

[0042] An electrode portion at the tip of an ignition electrode 561 for igniting fuel gas and a flame detection portion at the tip of a thermocouple 562 for detecting the combustion flame face the flame hole 560 of the upper burner 56. The ignition electrode 561 is connected to an igniter (not shown), and the thermocouple 562 is connected to a control device. A second temperature sensor 66 (second temperature detection means) for detecting the temperature above the grill plate 80 is also provided on the upper wall 24 of the heating chamber 20. The second temperature sensor 66 is, for example, a non-contact infrared temperature sensor. When an infrared temperature sensor is used, the infrared element is positioned so as to face diagonally downward in order to detect the overall temperature above the grill plate 80. The second temperature sensor 66 is connected to the control device, and a detection signal from the second temperature sensor 66 is input to the control device.

[0043] As shown in FIG. 3, an ignition electrode 161 is installed on the outer side near the rear end of the first burner 51. The electrode portion at the tip of the ignition electrode 161 faces one of the first non-opposing area flame holes 123 located near the rear end of the first flame hole row 120. The ignition electrode 161 is arranged so that the electrode main body extends diagonally downward and rearward from the electrode portion. When a spark discharge is generated from the ignition electrode 161 in the air-fuel mixture blown out from the first non-opposing area flame hole 123, which is an ignition flame hole, the air-fuel mixture is ignited, and the combustion flame generated by the ignition spreads to the air-fuel mixture blown out from other flame holes, thereby bringing the first burner 51 into a combustion state. The ignition electrode 161 is fixed to an electrode fixing member attached to the first burner 51 and is connected to an igniter (not shown).

[0044] A thermocouple 162, which serves as flame detection means, is installed on the outer side near the tip of the first burner 51. The flame detection portion at the tip of the thermocouple 162 faces one of the first non-opposing area flame holes 123 located near the tip of the first flame hole row 120. The thermocouple 162 is arranged so that the support body extends obliquely downward and rearward from the flame detection portion. The thermocouple 162 is fixed to a thermocouple fixing member attached to the first burner 51 and is connected to a control device. An ignition electrode 261 and a thermocouple 262 are also arranged in the second burner 52, similar to the first burner 51, except that they are bilaterally symmetrical.

[0045] 6 is a block diagram of the gas stove 1 of this embodiment. The control device C controls not only the first and second burners 51 and 52 but also the stove burner 11 and the upper fire burner 56. However, the following will only describe the control of the combustion of the first and second burners 51 and 52, and will omit a description of the stove burner 11 and the upper fire burner 56.

[0046] As shown in Fig. 6, the gas stove 1 is provided with a grill gas supply path Lg branching off from the main gas supply path Lm, and a stove gas supply path (not shown). A solenoid valve 501 is provided in the grill gas supply path Lg to cut off the supply of fuel gas to the upper burner 56 and the first and second burners 51, 52. The grill gas supply path Lg branches off into an upper gas supply path Lh that supplies fuel gas to the upper burner 56, and a lower gas supply path Ls that supplies fuel gas to the first and second burners 51, 52. An upstream flow rate adjustment valve 502 is provided in the upper gas supply path Lh to adjust the amount of fuel gas supplied to the upper burner 56.

[0047] The lower gas supply passage Ls further branches into a first gas supply passage L1 that supplies fuel gas to the first burner 51 and a second gas supply passage L2 that supplies fuel gas to the second burner 52. In the first gas supply passage L1 and the second gas supply passage L2, there are respectively provided, in order from the upstream side, a first on-off valve 504 that cuts off the supply of fuel gas to the first burner 51, a second on-off valve 505 that cuts off the supply of fuel gas to the second burner 52, a first flow rate adjustment valve 506 that adjusts the amount of fuel gas supplied to the first burner 51, and a second flow rate adjustment valve 507 that adjusts the amount of fuel gas supplied to the second burner 52.

[0048] The solenoid valve 501, the first and second on-off valves 505, and the first and second flow rate control valves 506, 507 are connected to the control device C via electrical wiring (not shown), and their opening / closing and opening degrees are controlled by control signals from the control device C. Therefore, the first and second burners 51, 52 are configured to independently control the amount of fuel gas supplied to them. Specifically, in this embodiment, the first and second burners 51, 52 are extinguished by closing the solenoid valve 501 while the first and second burners 51, 52 are burning. Furthermore, while the first burner 51 is burning, the power of the first burner 51 is switched between high and low by adjusting the opening degree of the first flow rate control valve 506. Furthermore, while the second burner 52 is burning, the power of the second burner 52 is switched between high and low by adjusting the opening degree of the second flow rate control valve 507. Furthermore, by closing the first on-off valve 504 while the first and second burners 51, 52 are burning, the first burner 51 is extinguished, and by adjusting the aperture of the second flow rate control valve 507, the heat power of the second burner 52 can be switched between high and low while the first burner 51 is extinguished. The same applies when the heat power of the first burner 51 is changed while the second burner 52 is extinguished. Thus, according to this embodiment, the first and second burners 51, 52 can be burned at different heat powers, and therefore the temperatures of the left and right half regions of the grill plate 80 can be made different.

[0049] As described above in detail, according to this embodiment, when grill plate 80 is housed in heating chamber 20, the burners that are positioned below grill plate 80 and heat grill plate 80 from below include first burner 51 having first flame hole row 120 with multiple flame holes 121 arranged in a row in the front-to-rear direction of heating chamber 20, and second burner 52 having second flame hole row 220 with multiple flame holes 221 arranged in a row in the same arrangement direction as first flame hole row 120. This allows for a larger combustion area than when a conventional annular burner is used, and enables a wider area of ​​bottom wall 81 of grill plate 80 to be heated. This reduces uneven heating of bottom wall 81 of grill plate 80, allowing bottom wall 81 of grill plate 80 to be heated evenly, improving cooking performance. In particular, in this embodiment, among the plurality of flame holes 121 in the first flame hole row 120 of the first burner 51, the first non-facing region flame holes 123 provided in the first non-facing region 141 of the first burner 51 that does not face the first temperature sensor 60 are formed so that the combustion flame extends from the diagonally upward inward direction on the inner side to the diagonally upward outward direction on the outer side. Furthermore, among the plurality of flame holes 221 in the second flame hole row 220 of the second burner 52, the second non-facing region flame holes 223 provided in the second non-facing region 241 of the second burner 52 that does not face the first temperature sensor 60 are formed so that the combustion flame extends from the diagonally upward inward direction on the inner side to the diagonally upward outward direction on the outer side. Therefore, a wide area can be heated from the center of the bottom wall 81 of the grill plate 80 in the left-right direction to the left-right periphery. Furthermore, when a grill plate 80 having an oil reservoir on the periphery is used, the generation of oily smoke can be prevented.

[0050] Furthermore, according to this embodiment, the first burner 51 and the second burner 52 are arranged such that the first burner hole row 120 and the second burner hole row 220 are arranged in parallel at a predetermined distance with the first temperature sensor 60 sandwiched therebetween, but among the plurality of burners 121 of the first burner hole row 120 of the first burner 51, at least the first opposing area burner hole 122 provided in the first opposing area 140 of the first burner 51 facing the first temperature sensor 60 is arranged such that the combustion flame flows from an upper direction on the inner side to an obliquely upward direction on the outer side. Among the plurality of flame holes 221 in the second flame hole row 220 of the second burner 52, at least the second opposing area flame hole 222 provided in the second opposing area 240 of the second burner 52 facing the first temperature sensor 60 is formed so that the combustion flame extends within a range from an upward direction on the inner side to a diagonally upward and outward direction on the outer side, but does not extend toward the first temperature sensor 60. Therefore, the first temperature sensor 60 is less affected by the combustion flame formed in the first opposing area flame hole 122 and the second opposing area flame hole 222. This allows the first temperature sensor 60 to accurately detect the temperature of the bottom wall 81 of the grill plate 80, improving cooking performance. In particular, in this embodiment, the burner holes 121, 221 are formed in a slit shape, which reduces interference between combustion flames of adjacent burner holes 121 in the front-to-rear direction of the first burner hole row 120 and between adjacent burner holes 221 in the front-to-rear direction of the second burner hole row 220. This further prevents the combustion flames of the first opposing area burner holes 122 and second opposing area burner holes 222 from affecting the first temperature sensor 60.

[0051] Furthermore, according to this embodiment, the first burner 51 has the first opposing area flame holes 122 in the first opposing area 140 facing the first temperature sensor 60, and the second burner 52 has the second opposing area flame holes 222 in the second opposing area 240 facing the first temperature sensor 60, so there is no gap in the combustion flame in the first flame hole row 120 or the second flame hole row 220. This makes it possible to uniformly heat the bottom wall 81 of the grill plate 80 while preventing the combustion flame formed in the first opposing area flame holes 122 and the second opposing area flame holes 222 from affecting the first temperature sensor 60.

[0052] Furthermore, according to this embodiment, the second temperature sensor 66 is provided above the heating chamber 20, so that it is possible to detect the temperature of the upper surface of the bottom wall 81 of the grill plate 80 and the temperature of the food to be cooked. This improves cooking performance and allows for quick response when an abnormality occurs.

[0053] Furthermore, according to this embodiment, the first burner 51 and the second burner 52 are configured from independent members, so that the first burner 51 and the second burner 52 can be made smaller, improving the ease of handling these burners when assembling them. Also, the ease of maintenance when a problem occurs in either burner can be improved.

[0054] Furthermore, according to this embodiment, first burner 51 and second burner 52 are configured so that the amount of fuel gas supplied thereto can be controlled independently, thereby widening the range of heat amounts that can be applied to grill plate 80. Furthermore, since a temperature difference can be created on grill plate 80, different types of cooking can be performed on a single grill plate 80.

[0055] (Embodiment 2) This embodiment has the same configuration as that of the first embodiment except that a burner that transfers the combustion flame is used between the first burner 51 and the second burner 52. Therefore, the same components are denoted by the same reference numbers and will not be described again.

[0056] Fig. 7 is a schematic perspective view of a portion of the vicinity of the grill of the gas stove of this embodiment. As shown in Fig. 7, the burners include independent rod-shaped first and second burners 51 and 52, and a flame-transfer guide member 70 disposed near the tips of the first and second burners 51 and 52. The guide member 70 covers the first non-opposing area flame holes 123 near the tip of the first burner 51's first flame hole row 120 and the second non-opposing area flame holes 223 near the tip of the second burner 52's second flame hole row 220 from the front and above. An ignition electrode 161 is provided on the outer side near the rear end of the first burner 51, and a thermocouple 262 serving as flame detection means is provided on the outer side near the rear end of the second burner 52.

[0057] In this embodiment, when a spark discharge is generated from the ignition electrode 161 in the air-fuel mixture blown out from the first non-opposing area burner hole 123, which is an ignition burner hole, the air-fuel mixture is ignited, and the combustion flame generated by the ignition spreads to the air-fuel mixture blown out from the other burner holes 121, thereby bringing the first burner 51 into a combustion state. On the other hand, the second burner 52 is not provided with an ignition electrode, but a guide member 70 covering the first and second non-opposing area burner holes 123, 223 is provided at the tip ends of the first and second burners 51, 52, so that the combustion flame formed in the first non-opposing area burner hole 123 can spread to the second non-opposing area burner hole 223. This means that it is necessary to provide an ignition electrode only on one burner and a flame detection means only on the other burner, thereby reducing costs and the burden of assembly work.

[0058] Furthermore, since the grill of this embodiment has the same burner and heating chamber 250 configuration as in embodiment 1, it is possible to uniformly heat the bottom wall 81 of the grill plate 80 and accurately detect the temperature of the bottom wall 81 of the grill plate 80.

[0059] (Other embodiments) (1) In the above embodiment, the rod-shaped first and second burners are arranged to extend in the front-to-rear direction within the heating chamber. However, in the present invention, the rod-shaped first and second burners may also be arranged to extend in the left-to-right direction within the heating chamber. In this case, the front door forms the first side wall of the heating chamber, and the rear wall of the heating chamber forms the second side wall of the heating chamber. Furthermore, the left-to-right length of the first and second rows of burners arranged side by side in the front-to-rear direction is at least 0.4W, which is the left-to-right width W of the cooking utensil, and the gap between the first and second rows of burners is no more than 0.5L, which is the front-to-rear length L of the cooking utensil.

[0060] (2) In the above embodiment, independent rod-shaped first and second burners are used. However, in the present invention, a horseshoe-shaped burner in which the first burner section and the second burner section are connected at the front end or the rear end may be used.

[0061] (3) In the above embodiment, an upper burner is provided in the heating chamber. However, in the present invention, it is not necessary to provide an upper burner.

[0062] (4) In the above embodiment, the first and second non-opposing region burners all have the same opening size. However, in the present invention, the first and second non-opposing region burners may have different opening sizes. [Explanation of symbols]

[0063] 2 Grill 5 Front door 20 Heating cabinet 21 Left side wall 22 Right side wall 51 First Burner 52 Second Burner 60 First temperature sensor 66 Second temperature sensor 80 Grill Plate 81 Bottom wall 101 1st upper wall section 120 1st flame hole row 122 1st opposing area flame hole 140 1st opposing area 201 2nd upper wall section 202 Second lower wall 203 Second upper bulge 204 2nd upper part 205 Second lower bulge 206 2nd lower side フランジ 211 Second non-inflammation foramen bulge 212 Second foramen bulge 220 The Second Flame Hole Row 222 Second Target Area Flame Hole 240 Second Target Area 250 Heating Chamber

Claims

1. a heating chamber having a substantially rectangular box-shaped heating chamber with an opening that opens forward and that can accommodate cooking utensils for heating and cooking food, and a front door that opens and closes the opening; a burner positioned below the cooking utensil when the cooking utensil is housed in the heating chamber and heating the cooking utensil from below; a first temperature detection means for detecting the temperature of the bottom wall of the cooking appliance by contacting the bottom wall of the cooking appliance, The burner has a first burner section having a first row of flame holes in which a plurality of flame holes are arranged in the front-rear direction or the left-right direction of the heating chamber, and a second burner section having a second row of flame holes in which a plurality of flame holes are arranged in the same arrangement direction as the first row of flame holes, the first burner section and the second burner section are arranged such that the first row of burner holes and the second row of burner holes are arranged in parallel at a predetermined distance with the first temperature detection means therebetween; Among the plurality of flame holes in the first flame hole row of the first burner section, the first opposing area flame holes provided in the first opposing area of ​​the first burner section opposing the first temperature detection means are formed so that the combustion flame does not extend toward the first temperature detection means, A cooking device in which, among the multiple flame holes in the second flame hole row of the second burner section, the second opposing area flame hole provided in the second opposing area of ​​the second burner section facing the first temperature detection means is formed so that the combustion flame does not extend toward the first temperature detection means.

2. The cooking device according to claim 1, the first opposing area flame hole is formed so that the combustion flame extends within a range from above the first burner unit on the inner side to a first side wall of the heating chamber located on the opposite side of the first temperature detection means on the outer side, A cooking device in which the second opposing area flame hole is formed so that the combustion flame extends within a range from above the second burner section on the inner side to the second side wall of the heating chamber located on the opposite side of the first temperature detection means on the outer side.

3. The cooking device according to claim 1 or 2 further comprises: A cooking device having a second temperature detection means for detecting the temperature above the cooking utensils housed in the heating chamber.

4. The cooking device according to any one of claims 1 to 3, The first burner section and the second burner section are a cooking device configured by an independent first burner and second burner.

5. The cooking device according to claim 4, A cooking device in which the first burner and the second burner are configured so that the amounts of fuel gas supplied thereto are independently controlled.

6. The cooking device according to any one of claims 1 to 5, The first burner section has a first upper wall section that is convex upward and has a generally triangular cross section, The second burner section has a second upper wall section that is convex upward and has a generally triangular cross section, the plurality of burner holes in the first burner hole row of the first burner section are open to the first upper wall portion and are slit-shaped burner holes that are long in a direction intersecting the arrangement direction of the first burner hole row, the plurality of burner holes in the second burner hole row of the second burner section are open to the second upper wall portion and comprise slit-shaped burner holes that are long in a direction intersecting the arrangement direction of the second burner hole row, the first opposing area flame holes are open in a range from the outer slope of the first upper wall portion to the ridge line, The second opposing area flame port is open in a range from the outer slope of the second upper wall portion to the ridge line of the cooking device.

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