Charcoal grill

Abstract

To provide a charcoal roaster with a simple structure and high combustion efficiency. [Solution] The charcoal roaster 1 is made of metal with an open top 3 and comprises an outer frame 10 with air holes 20 formed to allow outside air to enter, a plurality of insulating firebricks 30 arranged inside the outer frame 10 and forming a combustion space 5 for charcoal 60 inside, and mortar 40 that fills the gaps between the insulating firebricks 30. The insulating firebricks 30 have a thermal conductivity of 1.0 W / m K or less at 600°C.

Description

[Technical Field]

[0001] This invention relates to a charcoal grill that cooks food by burning charcoal, and in particular to a charcoal grill with high combustion efficiency. [Background technology]

[0002] Charcoal grills have traditionally been used to cook yakitori, eel, and other foods. Charcoal grills typically consist of a rectangular metal outer panel with an open top, the inside of which is lined with firebricks or similar, air holes are provided underneath, and a grate (slatted floor) is installed underneath as a platform for placing charcoal (see, for example, Patent Document 1). This structure allows the heat and infrared rays from the charcoal burning at a high temperature to heat the ingredients, enabling cooking that enhances their flavor.

[0003] The burning temperature of charcoal can reach as high as 1000°C, so firebricks with a fire resistance of 1000°C or higher have been used. However, firebricks tend to absorb heat and take away the heat from the charcoal, which tends to increase charcoal consumption, so there has been a demand for more efficient use of charcoal, especially when using high-quality charcoal.

[0004] Therefore, the inventors tried to manufacture a charcoal roaster by inserting insulating material between the firebricks and the outer panel, but the manufacturing process became complicated and the product price increased.Meanwhile, they noticed that firebricks with insulating properties were being put to practical use in the field of industrial furnaces. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Registered Utility Model No. 3156432 Summary of the Invention [Problem to be solved by the invention]

[0006] Therefore, the object of this invention is to provide a charcoal roaster with a simple structure and high combustion efficiency. [Means for solving the problem]

[0007] In order to solve the above problems, a charcoal roaster 1 according to a first aspect of the present invention, as shown in Figures 1 and 2, comprises a metal outer frame 10 with an open top 3 and air holes 20 formed therein for allowing outside air to enter, a plurality of insulating firebricks 30 arranged inside the outer frame 10 and forming a combustion space 5 for charcoal 60 therein, and mortar 40 filling the gaps between the insulating firebricks 30, the insulating firebricks 30 having a thermal conductivity of 1.0 W / m·K or less at 600°C.

[0008] With this configuration, the charcoal combustion space is surrounded by fireproof insulating bricks, making it difficult for the charcoal combustion heat to be absorbed by the charcoal roaster, and also suppressing heat leakage to the outside, resulting in a charcoal roaster that can use charcoal efficiently.

[0009] In the charcoal roaster 1 according to the second embodiment of the present invention, the bulk density of the insulating firebricks 30 is 1.5 g / cm 3 With this configuration, the bulk density of the insulating firebricks 30 is small, making the charcoal roaster light and easy to handle.

[0010] In the charcoal roaster 1 according to the third aspect of the present invention, the mortar 40 is an insulating mortar with a thermal conductivity of 1.0 W / m K or less at 600°C. With this configuration, the gaps between the insulating firebricks are filled with insulating mortar, further reducing heat loss to the outside and resulting in a charcoal roaster that can use charcoal more efficiently.

[0011] 1 and 2, the charcoal roaster 1 according to the fourth aspect of the present invention is provided with a grate 50 for placing charcoal 60 in the combustion space 5 inside the insulating firebricks 30. With this configuration, the charcoal is burned using the grate, which makes it easier for air to be supplied to the charcoal, resulting in a charcoal roaster that burns charcoal efficiently.

[0012] In addition, in the charcoal grill 1 according to the fifth aspect of the present invention, the grate 50 uses insulating firebricks. With this configuration, the grate is also made of insulating firebricks, which reduces the downward flow of heat and makes the charcoal grill more efficient. Furthermore, because the grate, which was previously made of heavy cast iron, is now made of insulating firebricks, the charcoal grill becomes lighter and easier to handle. [Effects of the Invention]

[0013] The charcoal grill of this invention comprises a metal outer frame with an open top and formed with air holes to allow outside air to enter the interior, a plurality of insulating firebricks arranged inside the outer frame to form a charcoal combustion space inside, and mortar to fill the gaps between the insulating firebricks.The insulating firebricks have a thermal conductivity of 1.0 W / m·K or less at 600°C, so by surrounding the charcoal combustion space with insulating firebricks, the charcoal combustion heat absorbed by the charcoal grill and the combustion heat that escapes to the outside are reduced, providing a charcoal grill with a simple structure that can use charcoal efficiently. [Brief explanation of the drawings]

[0014] [Figure 1] FIG. 1 is a perspective view of a charcoal roaster. [Figure 2] FIG. 2 is a cross-sectional view of the charcoal roaster shown in FIG. 1 taken at the position of the air hole. DETAILED DESCRIPTION OF THE INVENTION

[0015] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In each drawing, identical or corresponding devices are designated by the same reference numerals, and duplicate explanations will be omitted. Furthermore, terms indicating directions such as "up, down, left, right, horizontal" in this document indicate directions in the drawings and do not necessarily correspond to the directions of actual objects. First, the structure of a charcoal roaster 1 as an embodiment of the present invention will be described with reference to Figures 1 and 2.

[0016] The charcoal grill 1 comprises a metal outer frame 10 having a bottom surface 12 and side panels 14, 15, 16, and 17, and an open top 3. The outer frame 10 is typically formed of a stainless steel plate, but may be formed of other metal plates. A frame 19 may be provided at the top end of the outer frame 10 for placing cooking skewers or a grill (not shown). An air hole 20 is formed in the lower portion of the side panel 14, which faces the operator during use. The air hole 20 is a hole for introducing air for combustion of the charcoal 60 into the interior, and is provided with a door 22 so that the size of the opening can be adjusted. While two air holes 20 are shown in FIG. 1, the number of air holes 20 is not limited to two. Legs 18 may be formed downward from the bottom panel 12 to prevent the charcoal grill 1 from directly touching a cooking table or the like.

[0017] A plurality of insulating firebricks 30 are attached to the inside of the outer frame 10. The insulating firebricks 30 are arranged so as to surround at least the height at which charcoal 60 (described later) is placed up to the upper part 3, forming a combustion space 5 for the charcoal 60 inside. The insulating firebricks 30 referred to here are bricks that have a heat resistance of 1000°C or more and a thermal conductivity of 1.0 W / mK or less at 600°C. The thermal conductivity is preferably 0.7 W / mK or less. The insulating firebricks 30 have a bulk density of 1.5 g / cm 3 It is preferable that:

[0018] Gaps between the insulating firebricks 30 are filled with mortar 40. In this case, the mortar 40 is preferably an insulating mortar having a thermal conductivity at 600°C of 1.0 W / mK or less.

[0019] Mortar 42 may be applied to the inside of the outer frame 10 below the height at which the charcoal 60 is placed. Mortar 42 may also be applied to the inside of the bottom plate 12, i.e., the upper surface. The mortar 42 may be insulating mortar. Alternatively, fireproof insulating bricks or other bricks may be installed instead of the mortar 42. Note that the mortar 42 may not be applied to the air hole 20, and bricks or the like may not be installed therein.

[0020] A grate 50 may be installed on the bottom surface 12, i.e., on the mortar 42 of the bottom surface 12. The grate 50 is a component on which charcoal 60 burns, and may have gaps between its periphery and the insulating firebricks 30 on the side panels 14, 15, 16, and 17 through which charcoal embers can fall. The grate 50 is preferably made of the same bricks as the insulating firebricks 30, installed horizontally, but may also be formed of cast metal, as with conventional grates. In a cast grate 50, charcoal embers can fall through gaps in the casting on the top surface of the grate 50, and there may be no gap between the grate and the side panels 14, 15, 16, and 17. The grate 50 is placed on a support 52, which is placed on the mortar 42 of the bottom surface 12, and adjusted to the desired height. The support 52 is made of an iron rod and serves as a platform for the grate 50, but the height of the charcoal 60 burning on the grate 50 may be adjusted to the desired height by other means. The grate 50 facilitates the supply of combustion air to the charcoal 60.

[0021] The charcoal roaster 1 does not necessarily have to be equipped with a grate 50. In that case, it is preferable to use fireproof insulating bricks 30 for the bottom surface. It is also a good idea to supply combustion air to the charcoal 60 by blowing air from an opening in the top 3 of the charcoal roaster 1 with a fan, for example.

[0022] To cook food using charcoal combustion using the charcoal grill 1 described above, charcoal 60 is burned within the combustion space 5. The intensity of the combustion is adjusted by adjusting the opening / closing position of the door 22 of the air vent 20. Then, food is placed in the open upper portion 3 of the charcoal grill 1 using a grill, skewers, or the like placed on the frame 19. In the charcoal grill 1, the area above the burning charcoal 60 is surrounded by insulating firebricks 30 with a thermal conductivity of 1.0 W / mK or less at 600°C. This prevents combustion heat from being absorbed by the surrounding structure and instead directs the combustion heat upward for effective use in cooking food, allowing for efficient use of charcoal. If the insulating firebricks 30 have a thermal conductivity of, for example, 0.7 W / mK or less, charcoal can be used even more efficiently. Furthermore, if the mortar 40 filling the gaps between the insulating firebricks 30 is insulating mortar, the mortar 40 also absorbs less combustion heat, allowing for efficient use of charcoal. Furthermore, by using fireproof insulating bricks for the grate 50 or by using fireproof insulating bricks for the bottom surface 12 where the charcoal 60 burns, the heat of combustion of the charcoal 60 can be prevented from dissipating downward, allowing the charcoal to be used efficiently.

[0023] In addition, the bulk density of the refractory insulating brick 30 is 1.5g / cm 3 If the weight is less than this, the charcoal grill 1 will be lightweight and easy to use. By using insulating firebricks for the grate 50, the weight can be further reduced, and in some embodiments, the weight can be reduced by 10% or more. Furthermore, by using insulating firebricks, infrared rays are reflected more effectively than with a cast iron grate, and the efficiency of heating food using infrared rays is improved.

[0024] Mortar 42 is typically used to attach the insulating firebricks 30 to the inside of the outer frame 10. Conventionally, the mortar 42 is first applied to the bricks, and then the mortar-coated bricks are pressed against the side panels 14, 15, 16, and 17 of the outer frame to attach them. However, it is preferable to apply mortar 42 to the side panels 14, 15, 16, and 17 first, and then press the insulating firebricks 30 against the mortar 42 to attach them, as this results in a uniform thickness of mortar 42. The mortar 42 used to attach the insulating firebricks 30 may also be the same insulating mortar used to fill the gaps between the insulating firebricks 30. Note that the insulating firebricks 30 may also be attached to the inside of the outer frame 10 by means other than mortar 42.

[0025] 1 and 2, the charcoal roaster 1 is shown as having a rectangular horizontal cross section, but the shape is not limited thereto. Also, the door 22 of the air hole 20 of the outer frame 10 is shown as sliding horizontally and left and right to adjust the size of the opening, but the size of the opening may be adjusted by sliding up and down or in other ways.

[0026] As explained above, the charcoal grill 1 of the present invention can provide a charcoal grill that can use charcoal efficiently with a simple structure similar to that of conventional charcoal grills. It can also be a lightweight and easy-to-use charcoal grill. Furthermore, it can more effectively utilize the infrared rays generated by the burning charcoal. [Explanation of symbols]

[0027] 1 Charcoal grill 3. Upper part 5 Combustion space 10 Outer Frame 12 Bottom plate 14, 15, 16, 17 Side panels 18 legs 19 Top border 20 air vents 22 Door 30 Fireproof insulating bricks 40 Mortar (to fill gaps in fireproof insulating bricks) 42 Mortar 50 Rostrum 52 Horse (for grate) 60 charcoal

Claims

1. an open-top metal outer frame having air holes formed therein for allowing outside air to enter; a plurality of insulating firebricks disposed inside the outer frame and defining a charcoal combustion space therein; mortar that fills gaps between the plurality of insulating firebricks; The insulating firebrick has a thermal conductivity of 1.0 W / m K or less at 600°C; Charcoal grill.

2. The bulk density of the insulating firebrick is 1.5 g / cm ３ The following is true: Charcoal roaster according to claim 1.

3. The mortar is a heat insulating mortar having a thermal conductivity of 1.0 W / m·K or less at 600°C; 3. A charcoal roaster according to claim 1 or 2.

4. A grate is provided for placing charcoal in the combustion space inside the insulating firebrick; 3. A charcoal roaster according to claim 1 or 2.

5. The grate uses refractory insulating bricks; 5. A charcoal roaster according to claim 4.

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