KR950008871B1 - Cellular base for a grill - Google Patents

Abstract

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Description

Cellular Substrates for Barbecue Grills

1 is a perspective view of a part of a cell substrate for a grill according to the present invention;

FIG. 2 is a plan view of a cellular substrate embodiment of the present invention shown in FIG.

Figure 2a is a plan view of another embodiment of a cell substrate for a grill according to the present invention.

3 is an enlarged plan view of a specific cell and cells adjacent thereto in detail in the embodiment shown in FIG. 1;

4 is a vertical cross sectional view of the cellular substrate shown in FIG. 1 along line 3-3.

5 is a perspective view of a barbecue grill, partially cut away to show the preferred use of a cellular substrate.

* Explanation of symbols for main parts of the drawings

10: cell type substrate 12: top plane

13: bottom flat 16: wall

17 outer skin 30 cell

40, 42, 44, 46: wall 60: barbecue grill

62: body 64: legs

68 gas pipe 66 gas tank

70: floor 80: flame

74: grill

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cell-type substrate used for barbecue grills, and the like, and particularly to ceramic honeycomb substrates provided between a flame and a cooking surface of a barbecue grill to distribute heat evenly and prevent sparks from occurring during the cooking process. It is about.

Barbecue grills that use propane gas or charcoal as fuel all contain the same basic elements: flame, heat preservation / release material and cooking surfaces or grills. Barbecue grills, usually charcoal-fueled, initially use ignition oil to ignite. Once ignited, the heat preservation / release material is slowly burning and reddish-charcoal, distributing heat to the food on the grill. A disadvantage of charcoal grills is that burning charcoal produces combustion by-products in the form of carbon particles that do not naturally oxidize. Of course, the pieces of charcoal get messy before burning because of the charcoal powders. Another disadvantage of using charcoal-based grills is that they have to be exposed to the flame for quite some time until the charcoal maintains enough heat to cook the other food regardless of the flame.

Another problem with charcoal grills is that they are burned by the burning of fats, such as fatty substances, over the hot charcoal pieces in the food being cooked. When the flame rises like this, the safety of cooking is also fatal.

Gas grills have the drawbacks of charcoal grills; That is, it is designed to eliminate the charcoal dust, charcoal powder, which is an unoxidized particle generated when charcoal is burned, and a time delay for heating charcoal. In a typical gas grill, a gas flame heats the lava stones installed between the flame and the cooking grill. The lava rocks are made of heat-preserving material, providing a stable source of heat for cooking food on the grill. Of course, gas grills equipped with lava were inconvenient to spark when food debris ignited over the lava. In response to this problem, intermediate grills made of conventional stone were provided in place of lava stones. However, in such gas grills, it was not possible to eliminate the problem of sparking because of the heating and ignition of fatty substances that continued to flow out of the food on the grill (as opposed to lava rocks). This was burned improperly for eating.

Another drawback of conventional gas grills (as well as charcoal-based grills) is that lava (or forest) gradually loses its ability to conserve heat and must be replaced periodically.

Another drawback common to these two types of grills is that certain areas of the cooking surface become "hotter" than others. The result is that the food is cooked unevenly, so that some parts are cooked less and others are cooked more. One skilled in the art would expect this phenomenon to be measured by the "toast test", that is, by placing a slice of bread on a cooking surface and examining the baked and baked portions of the bread. . Gas grill manufacturers have long struggled with the problem of uniformly distributed heat being transferred from the heat source to the cooking surface.

In short, there is a need for a grill that eliminates sparks and distributes heat evenly.

The present invention solves the problems described above in a conventional grill by providing a substrate for a gas grill that eliminates blazing flames and provides heat evenly distributed over the cooked food.

Generally speaking, the present invention consists of a cellular substrate used in a heating device, in which the substrate member is mounted between the heat source and the heating surface to remove sparks and distribute evenly from the heat source to the heating surface. Provide heat.

In more detail, the preferred substrate member is molded into a honeycomb shape and made of ceramic material. Ceramic materials can maintain very high temperatures. The substrate is formed with a plurality of adjacent long cells. Preferred densities of cells can range from 16 cells to 200 cells per square inch. Preferred substrate members may range in thickness from 6.35 mm-25.4 mm (1/4 inch-1 inch).

Therefore, in the preferred use of the present invention, a gas grill substrate member is used instead of lava stone, stone stone, or the like. Since the honeycomb ceramic substrate member can maintain a very high temperature, any fatty substances falling from the food during cooking evaporate as soon as it comes into contact with the cellular substrate, thereby preventing the spark from spreading. The shape of each cell may vary, and it has been found that square, round, triangular, hexagonal, and octagonal cells are preferred. In addition, since the entire substrate member is heated during the grill operation, heat is evenly distributed and transmitted to the cooked food.

Therefore, it is an object of the present invention to provide a cell type substrate for a grill.

Another object of the present invention is to provide an improved heat source for barbecue grills.

It is another object of the present invention to provide a substrate which eliminates the sparking in the barbecue grill.

It is also an object of the present invention to provide a substrate that distributes heat evenly over the cooking surface of the barbecue grill.

It is a further object of the present invention to provide a substrate for barbecue grill that does not lose its ability to conserve heat and thereby does not need to be exchanged.

Other objects, features, and advantages of the present invention will become apparent by reference to the following specification and accompanying drawings.

Referring now to the drawings in which like reference numerals designate like parts in the previous figures, FIG. 1 shows a cellular substrate member embodying the present invention. The cellular substrate 10 is generally a rectangular block formed of an upper plane 12 and a lower plane 13 parallel thereto. The upper plane 13 is fixed apart by a plurality of connected walls 16 perpendicular to the upper and lower surfaces. Preferably, the walls 16 of the cellular substrate 10 are made of a ceramic material that can withstand severe heat and can retain that heat.

As shown in FIGS. 1 and 2, the connected walls 16 of the cellular substrate 10 are crossed at regular intervals, forming an array of repeating cells 30. This repeating arrangement of cells 30 looks like a honeycomb. Preferably, the thickness of the substrate 10 or the vertical distance between the top surface 12 and the bottom surface is in the range of about 1/4 inch-1 inch (0.64 cm-2.54 cm). As such, the cellular substrate member 10 is easily molded into an extruded portion provided with an outer skin 17.

Figure 2A shows another embodiment of the present invention having wall portions 16 (described in detail below) in nearly horizontal and vertical directions (as shown in the figures). It will be expected that the embodiments of FIGS. 1 and 2 are substantially identical in that they preserve and transfer heat in a manner consistent with the purposes described below.

One skilled in the art will understand that the honeycomb substrate 10 transfers heat between the heat source and the cooking surface of the gas grill. The substrate member 10 absorbs heat from the heat source and distributes the heat slowly and evenly to the food being heated or cooked. Therefore, as the thickness of the honeycomb substrate increases, the heat transfer efficiency from the heat source to the body being heated increases. However, when the maximum efficiency is reached, the efficiency begins to decrease. It has been found that such maximum thickness is within block thickness in the range of 1/4 inch-1 inch (0.64 cm-2.5 cm).

Each cell 30 has an upper hole 32 and a lower hole (not shown). The upper hole 32 is in the upper plane 12 and the lower hole is in the lower plane 13 of the substrate 10. The shape of the holes in each cell 30 may vary because they are formed by the connected walls 16. Through experiments, it was determined that the most suitable shapes for the cells were square, round, triangular, hexagonal and octagonal. However, those skilled in the art will appreciate that other forms may be provided as long as the heat preservation and heat transfer performance of the preferred embodiment are maintained.

In FIG. 3, the same sample cells 30a, 30b, 30c as each cell 30 located within the cellular substrate 10 are shown in more detail. It will be appreciated that cells 30b and 30c are adjacent to cell 30a. In a preferred embodiment of the present invention, the cell 30a is formed by connecting four walls 40, 42, 44, and 46 at substantially right angles. Each intersection of the four walls 40, 42, 44, 46 is reinforced by an inclined portion 50, which is a square block of ceramic material designed to provide structurally stable and heat-retaining performance to the cellular substrate 10. do. The first wall 40 of the central cell 30a is parallel with the third wall 44 and the second wall 42 is parallel with the fourth wall 46 so that all four walls intersect and each described above. Holes in the cell 30 are formed in diamond or diamond shape.

The cells 30 are arranged in such a way that adjacent cells share ceramic walls 16 therebetween. For example, referring back to FIG. 3, the first adjacent cell 30b shares the first cell 40 with the central cell 30a, and the second adjacent cell 30c shares the central cell with the second wall ( 42) (the walls 16 interrelation can also be seen in FIG. 4).

In a preferred embodiment of the present invention, the density of cells per square inch (6.4516 cm 2) is in the range of approximately 16-200 cells. If the density of cells exceeds 200 cells per square inch, the amount of heat passing through the cells will be greatly reduced. And if the density of cells is less than 16 cells per square inch, it will rise. The cell type substrate 10 may include various regions containing cells of different densities within this range to provide regions of varying heat intensity within the substrate 10 or to correct for an uneven distribution of heat from a heat source. It will be understood by those skilled in the art that it may have.

In FIG. 5, the cellular substrate 10 of the present invention is shown in a barbecue grill using gaseous fuel. The grill 60 includes a body 62 supported at some convenient height above the ground by two pairs of darls. The gas tank 66 is under the grill body 2 and fuel is delivered to the body by the gas pipe 68. Gas in gas tank 66 is fed through gas pipe 68 to a conventional series of injectors (not shown) mounted to cover bottom 70 of grill body 62. Each injector provides a spark 72 that is adjusted to be a heat source of the grill 60 when ignited.

The cellular substrate 10 of the present invention is installed at a predetermined height directly above the flame 72. The preferred height is determined to be in the range of about 1/2 inch-6 inch (1.27 cm-15.27 cm) above the flame. The cooking surface or grill 74 is installed at a predetermined height above the cellular substrate 10. It will be readily appreciated by those skilled in the art that the height of the cell substrate 10 and the grill 74 can be adjusted.

The food to be cooked is placed on the grill 74 after the injected gas is ignited to cause the cellular substrate 10 to absorb a sufficient amount of heat from the flame 72.

The cell-like substrate 10 evenly radiates heat received from the flame 72 upwardly toward the crushed stone 74 on which the food is placed. Fatty substances and flammable liquids that come out of food and flow onto the cellular substrate 10 are not at risk of sparking as they evaporate or flow into the cells 30 as soon as they contact the top 12 of the substrate 10. . In this way, the liquid does not come into contact with the flame 72, and as a result, the flame does not suddenly arise.

While the preferred embodiment of the present invention discloses a form of gaseous cell substrate, it is understood that the present invention may be applied differently. For example, in any manufacturing process where sparking is a problem, devices made of honeycomb-shaped ceramic members in a suitable environment will reduce, even if not eliminated.

Claims (10)

A cell substrate (10) for use in a heating apparatus comprising a heat source and a heating surface, comprising a honeycomb substrate member mounted between the heating surface and the heat source so that heat is evenly distributed from the heat source to the heating surface. 2. The cellular substrate according to claim 1, wherein said substrate member is formed of a ceramic material. The cell substrate of claim 1, wherein the thickness of the substrate member is in a range of 1/4 inch-1 inch (0.64 cm-2.54 cm). The cell-like substrate (10) according to claim 1, wherein said honeycomb substrate member forms a plurality of adjacent long cells (300). 5. The cellular substrate (10) according to claim 4, wherein the density of the tubular cells (30) ranges from 16 cells to 200 cells per square inch (6.4516 cm 2). Combustion fuel source; A flame 72 in fluid communication with the fuel source; Cooking surface located above; And a honeycomb ceramic substrate member 10 interposed between the flame 72 and the cooking surface, so that the substrate member 10 provides heat evenly distributed from the flame 72 to the cooking surface. And eliminating sparks by evaporating external materials in contact with the substrate member (10). 7. The barbecue grill (60) according to claim 6, wherein the thickness of the substrate member (10) is in the range of 1/4 inch-1 inch (0.64 cm-2.54 cm). 7. Barbecue grill (60) according to claim 6, wherein said honeycomb substrate member (10) forms a plurality of adjacent elongated cells (30). 9. The barbecue grill (60) according to claim 8, wherein the density of the tubular cells (30) ranges from 16 cells to 200 cells per square inch (6.4516 cm 2). A grill body 62 forming a bottom 70; A heat source mounted on the bottom 7 of the grill body 62 and covering the bottom 70, wherein the heat source is mounted on the tank 66 filled with combustible fuel and on the bottom 70 and the fuel tank 66. And a heat source configured to be in fluid communication with the heat source to generate heat as soon as the fuel is ignited at the plurality of injector positions; A cooking surface installed at a predetermined height above the heat source to support the food cooked above the heat source; And a cell type substrate member 10 provided between the heat source and the cooking surface, the ceramic block being formed to have a plurality of long cells 30 varying in density from 16 cells to 200 cells per square inch (6.4516 cm 2). It is composed of a cell-like substrate member 10 is configured, the cell-like substrate 10 transfers heat evenly and uniformly from the heat source to the heating surface, which can fall off the cooking surface when cooking food Barbecue grill (60) to evaporate any fatty material so that no spark from the heat source.

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