Grilling equipment

Abstract

To provide a grilling device that comprises a burner 4 for burning hydrogen gas and a food placement part 2 provided above the burner, can grill food on the food placement part in both a state of imparting moist feeling on a surface and a state of imparting crisp feeling on the surface.SOLUTION: A grilling device is provided with introduction position changing means 6 that changes an introduction position of secondary air supplied to a burner. When a housing 13 is provided that extends downward and surrounds a portion of the burner located below a food placement part, the introduction position changing means is composed of a blockage change plate that is attached to a lower end opening 13b of the housing so as to be able to change a blockage area of the lower end opening.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a grilling apparatus that includes a burner that burns hydrogen gas and a food placement section that is provided above the burner. [Background technology]

[0002] A known example of the above-mentioned type of grilling device is described in Patent Document 1. This device is equipped with a burner having a tubular burner body with one closed end and multiple flame holes spaced apart along the length of the burner body, and forms a flame by combustion of hydrogen gas supplied through a nozzle fitted to the other open end of the burner body and ejected from each flame hole, allowing food such as meat or fish placed on the food placing section to be grilled.

[0003] It is known that hydrogen combustion gas produced by burning hydrogen has a higher water vapor content per unit heat than combustion gas produced by burning hydrocarbons. Therefore, when hydrogen combustion gas is brought into direct contact with food, the moisture contained in the hydrogen combustion gas washes away excess fat, making it possible to grill food with a moist surface and a high moisture content. On the other hand, it is difficult to grill food with a crispy surface and a low moisture content. For this reason, if a crispy finish is desired in grilled food, an additional step of searing the surface using, for example, a gas cylinder-type torch burner is required, which significantly reduces cooking performance. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2012-42068 A Summary of the Invention [Problem to be solved by the invention]

[0005] In view of the above, the present invention aims to provide a grilling device with good cooking properties that can grill food on the food loading section in both a moist state and a crispy state. [Means for solving the problem]

[0006] In order to solve the above problems, the grilling device of the present invention, which is equipped with a burner that burns hydrogen gas and a food placement section located above the burner, is characterized by having an introduction position variable means that changes the introduction position of the secondary air supplied to the burner.

[0007] According to the present invention, the amount of secondary air at each portion of the burner can be varied by changing the secondary air introduction position using the introduction position variable means. Furthermore, in burner portions with a high secondary air supply, the moisture content of the hydrogen combustion gas washes away excess grease, allowing for grilling with a moist surface. On the other hand, in burner portions with a low secondary air supply, the flame extends upward to reach the secondary air, intensely heating the food, allowing for grilling with a crispy surface with less moisture. It has been confirmed that reducing the secondary air supply does not impair combustion stability, and the upward flame sears the food, imparting a moderate fragrant flavor and browning to the food. Thus, the present invention makes it possible to grill both a moist surface and a crispy surface simply by changing the secondary air introduction position.

[0008] In the present invention, when a housing is provided that extends downward and surrounds the portion of the burner located below the food placement section, the introduction position variable means may be configured as a closure variable plate attached to the lower end opening of the housing so that the closure area of ​​the lower end opening can be changed. This advantageously allows the secondary air introduction position to be changed simply by changing the closure area of ​​the lower end opening. During burner combustion, secondary air is also introduced through the lower end opening of the housing, and the secondary air flowing through the housing cools the burner and the housing. However, in areas of the burner where the supply of secondary air is low, the cooling effect of the burner and the housing is reduced, resulting in a higher ambient temperature around the burner compared to areas of the burner where the supply of secondary air is high. Therefore, radiant heat also heats the food, allowing for grilling with a crispy texture, a fragrant flavor, and a more toasty browned appearance.

[0009] In addition, in the present invention, it is preferable that the cooking apparatus further includes a partition plate that divides the space within the housing into a plurality of small spaces extending vertically, and the closure change plate is configured to be able to close the lower end opening of the housing that leads to any of the small spaces. This allows the surface of the single food placement section to be clearly divided into an area where grilling with a moist surface is possible and an area where grilling with a crispy surface is possible, thereby improving adjustability. [Brief explanation of the drawings]

[0010] [Figure 1] 1 is a perspective view of a grilling apparatus according to an embodiment of the present invention; [Figure 2] FIG. 2 is a cross-sectional view taken along line II-II in FIG. [Figure 3] FIG. 3 is a cross-sectional view taken along line III-III in FIG. 2. [Figure 4] FIG. 2 is a plan view of the grilling apparatus shown in FIG. 1. [Figure 5] 10(a) to 10(c) are plan views showing occlusion change plates with different occlusion areas. [Figure 6] FIG. 10 is a perspective view of a grilling apparatus equipped with a modified closing change plate. DETAILED DESCRIPTION OF THE INVENTION

[0011] Hereinafter, an embodiment of the grilling apparatus GR will be described with reference to the drawings, taking as an example a case where the burner is a tubular burner. Note that the "hydrogen" referred to in this invention is not limited to pure hydrogen, but also includes, for example, fuel gas containing 40% or more hydrogen gas, or a case where a small amount of odorant is added for odorization.

[0012] 1 to 3, the grilling apparatus GR of this embodiment includes a top plate 1 that is rectangular in plan view and elongated in the X-axis direction, with two horizontal, orthogonal directions being the X-axis and Y-axis directions. A rectangular opening 11 is formed in the center of the top plate 1 and elongated in the X-axis direction. Four hood plates 12 are erected on the top surface of the top plate 1, surrounding the opening 11, to prevent excess secondary air from being supplied to the burners 4 (described below) from above. Each hood plate 12 has multiple slits 12a extending downward from its upper end. A grill 2 serving as a food placement area is installed above the opening 11. Support rods 2a protrude from the grill 2 and are inserted into the slits 12a of the hood plates 12 on both sides in the Y-axis direction. The grill 2 is supported at the lower ends of the slits 12a via the support rods 2a and can be freely removed upward through the slits 12a.

[0013] A housing 13 with an open bottom is suspended from the top plate 1, extending downward from the inner edge of the opening 11. The housing 13 encloses the straight tube section 4a of the burner 4, which is located below the grill 2. A pair of insulating support plates 14 are provided on the outer surfaces of side walls 13a, 13a of the housing 13, located on both sides in the X-axis direction. Storage boxes 15, 15 are attached to each support plate 14, and these support plates 14 and storage boxes 15, 15 support both sides of the top plate 1 in the X-axis direction. One of the storage boxes 15 contains well-known components necessary for burning the burner 4, such as a valve unit including a hydrogen gas cock operated by an operating knob (not shown) on its outer surface, an igniter, and a controller, although these are not specifically shown or described. In addition, a drip tray 3 is stored between the two support plates 14, spaced downward from the bottom end of the housing 13, so that it can be inserted and removed in the Y-axis direction. 1 denotes a heat insulating plate attached to bridge the spaces between the support plates 14, and in FIG. 3, 17 denotes a support base for the drip tray 3. Burners 4 are provided by being inserted through holes (not shown) provided in the side walls 13a, 13a.

[0014] The burner 4 is a tubular burner having two straight pipe sections 4a, 4a extending in the X-axis direction and arranged side by side with a gap in the Y-axis direction. A large number of upward-opening flame holes 41 are formed at intervals in the X-axis direction in the portion of each straight pipe section 4a, 4a located inside the housing 13 and facing the opening 11. Nozzles (not shown or described) are fitted to one end of each straight pipe section 4a, 4a that protrudes into one storage box 15 through one side wall 13a on the X-axis direction and the support plate 14. Hydrogen is supplied to each straight pipe section 4a through the nozzles, and the hydrogen ejected from the flame holes 41 is diffused and burned. Above each straight pipe section 4a, 4a, infrared radiation members 5, 5 are provided, supported by the side walls 13a, 13a, respectively, and curved in an upwardly convex arc, and the infrared radiation members 5, 5 are heated to red heat by flames formed by the combustion of hydrogen gas ejected from each flame hole 41, and the infrared radiation emitted from the infrared radiation members 5, 5 grills food (not shown) placed on the grill 2. At this time, hydrogen combustion gas generated by burning hydrogen overflows from below the infrared radiation members 5, 5 and rises, contributing to heating the food placed on the grill 2 and also washing away fat and salt as the hydrogen combustion gas comes into contact with the food.

[0015] As described above, by contacting the hydrogen combustion gas with the food, fat and salt are washed away, making it possible to grill food with a moist surface, resulting in a high moisture content. On the other hand, grilling food with a crispy surface, resulting in a low moisture content, is difficult. Therefore, it is desirable to be able to grill food with both a moist surface and a crispy surface using a single grilling device GR. To this end, an introduction position changer is provided to change the introduction position of the secondary air supplied to the burner 4. The introduction position changer is composed of an obstruction change plate 6 attached to the lower end opening 13b of the housing 13 so as to change the obstruction area of ​​the lower end opening 13b.

[0016] 4 and 5, the blocking change plate 6 is composed of a plate-like member that is rectangular in plan view and has a length in the X-axis direction equivalent to that of the opening 11 and a width in the Y-axis direction equivalent to that of the juice tray 3. The blocking change plate 6 also has an inlet opening 61 that allows the introduction of secondary air, and the portion of the blocking change plate 6 that does not have the inlet opening 61 forms a blocking region 62 of the lower end opening 13b. In this embodiment, three types of blockage change plates 6 are used, each having a different blockage area of ​​the lower end opening 13b: a first blockage change plate 6a (see Figure 5(a)) having a rectangular inlet opening 61a in a planar view so that approximately 1 / 2 of the area in the X-axis direction faces from one end of each straight pipe section 4a, 4a located within the housing 13; a second blockage change plate 6b (see Figure 5(b)) having a rectangular inlet opening 61b in a planar view so that approximately 1 / 3 of the area in the X-axis direction faces from one end of each blockage change plate 6a; and a third blockage change plate 6c (see Figure 5(c)) having a rectangular inlet opening 61c in a planar view so that approximately 2 / 3 of the area in the X-axis direction faces from one end of each blockage change plate 6a. A pair of guide support plates 13c, 13c extending in the Y-axis direction are formed on the inner surfaces of the lower ends of the side walls 13a, 13a of the housing 13 located on both sides in the X-axis direction, and the guide support plates 13c, 13c guide the respective blocking change plates 6a, 6b, 6c so that they can be inserted and removed in the Y-axis direction, and the respective blocking change plates 6a, 6b, 6c can be attached interchangeably.

[0017] A partition plate 7 is installed within the housing 13, dividing the internal space into multiple small spaces extending in the vertical direction. In this embodiment, two small spaces are arranged side by side in the X-axis direction by a single partition plate 7. A notch 71 is formed at the upper end of the partition plate 7 to receive the straight pipe portion 4a. Sliding plate portions 72 are formed on both sides of the partition plate 7 in the Y-axis direction, abutting against side walls 13d of the housing 13 located on both sides in the Y-axis direction. The sliding plate portions 72 each have outwardly protruding tongue pieces 73. Longitudinal slits 13e are formed in the side walls 13d of the housing 13 in the X-axis direction, through which the tongue pieces 73 are inserted. The position of the partition plate 7 within the housing 13 in the X-axis direction can be arbitrarily changed by displacing the tongue pieces 73 along the slits 13e in the X-axis direction. 4, when the first blockage change plate 6a is attached to the lower end opening 13b of the housing 13 and the partition plate 7 is at the intermediate position in the X-axis direction, approximately half of the straight pipe sections 4a, 4a in the X-axis direction faces the blockage region 62a, and the remaining straight pipe sections 4a, 4a face the introduction opening 61a. As a result, during combustion of the burner 4, the amount of secondary air flowing toward the flame formed by the combustion of the hydrogen gas ejected from each flame hole 41 can be reduced in the section of the straight pipe sections 4a, 4a facing the blockage region 62a compared to the section of the straight pipe sections 4a, 4a facing the introduction opening 61a.

[0018] According to the above embodiment, when food is placed on the grill 2 and grilled, the amount of secondary air is reduced in the region Ge2 (shown by dots in Figure 5), approximately halfway along the X axis of the grill 2. Because the amount of secondary air supplied to the straight pipe section 4a is small, the flame extends upward in search of the secondary air, intensely heating the food. This allows the food to be grilled with a crispy surface. At this time, the cooling effect of the straight pipe sections 4a, 4a and the interior of the housing 13 is reduced, resulting in a higher ambient temperature in the straight pipe sections 4a, 4a than in the other region Ge2, approximately halfway along the X axis of the grill 2. Therefore, the food is also heated by radiant heat, allowing for grilling with a crispy texture, a fragrant flavor, and an even more toasty browned texture. It was also confirmed that reducing the amount of secondary air supplied does not impair combustion stability. On the other hand, in the area Ge1 of the grill 2, excess fat is washed away by the moisture contained in the hydrogen combustion gas, making it possible to grill food while keeping the surface moist.

[0019] According to the grill cooking device GR described above, the surface of the single grill grate 2 is divided into two regions Ge1 and Ge2, making it possible to grill food in both regions Ge1 with a moist surface and in region Ge2 with a crisp surface. The size of each region Ge1 and Ge2 can be easily changed by simply changing the type of closure change plates 6a, 6b, and 6c attached to the lower opening 13b of the housing 13 and correspondingly changing the position of the divider plate 7 in the X-axis direction, in other words, by changing the position where the secondary air is introduced.

[0020] Although the above describes an embodiment of the present invention with reference to the drawings, various modifications are possible without departing from the scope of the technical concept of the present invention. In the above-described grill cooking apparatus GR, the occlusion change plate 6 is attached to the lower end opening 13b of the housing 13 as the introduction position adjusting means. However, this is not limited to this. For example, multiple secondary air introduction holes (not shown) may be provided in the side walls 13a, 13d of the housing 13 facing the space between the burners 4, 4 and the infrared radiation members 5, 5, and any of the introduction holes may be selectively occluded. Furthermore, although the above description describes an example in which three types of occlusion change plates 6 with different occlusion areas can be interchangeably attached, this is not limited to this. For example, as shown in FIG. 6, a single occlusion change plate 60 elongated in the Y-axis direction may have a single opening 60a in which the introduction openings 61a, 61b, 61b of the above-described embodiment are connected in the Y-axis direction. Changing the insertion amount of the occlusion change plate 60 in the Y-axis direction changes the size of the occlusion area 60b.

[0021] In the above embodiment, a single divider plate 7 is provided to divide the surface of the grill 2 into two regions Ge1, Ge2, but the number of dividers is not limited to this and can be added as needed depending on the closure region 62 of the closure change plate 6 (i.e., depending on the number of regions into which the surface of the grill 2 is to be divided). On the other hand, if the grill cooking device GR is used in two different ways, with the bottom opening 13b of the housing 13 fully closed to provide a crispy grill on the entire surface, and with the bottom opening 13b of the housing 13 fully open to provide a moist grill on the entire surface, the divider plate 7 can be omitted.

[0022] Furthermore, while the grill cooking device GR has been described above as having two independent straight pipe sections 4a, 4a as the burner 4, this is not limited to this. The number of straight pipe sections 4a, 4a can be three or more, and the present invention can also be applied to burners in which one end of each straight pipe section 4a, 4a is connected to one another, or burners with a circular outline. Furthermore, while the grill 2 is used as the food placement section, the food placement section can also be made of a metal plate with slits formed through it in the vertical direction. [Explanation of symbols]

[0023] GR...grilling cooking device, 13...housing (component of introduction position variable means), 13b...lower end opening, 2...grill (food placement section), 4...burner, 4a...straight tube section, 41...flame hole, 6...blockage change plate (introduction position variable means), 61...introduction opening, 62...blockage area, 7...partition plate.

Claims

1. A grilling apparatus including a burner for burning hydrogen gas and a food placement section provided above the burner, A grilling apparatus is provided with an introduction position variable means for changing the introduction position of secondary air supplied to the burner, and a housing extending downward to surround the portion of the burner located below the food placement section, the introduction position variable means being composed of a blocking change plate attached to the lower end opening of the housing so as to be able to change the blocking area of ​​the lower end opening.

2. The device further includes a partition plate that divides the space within the housing into a plurality of small spaces extending in the vertical direction, 2. The grilling apparatus according to claim 1, wherein the closing change plate is configured to close a lower end opening of the housing that leads to any one of the small spaces.

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