Heat chamber for capturing, transferring and distributing the heat generated by a burner tube of a burner system, installed in the combustion chamber of a gas grill appliance.

Abstract

Heat chamber (1) for capturing, transferring and distributing the heat generated by a burner tube (8) of a burner system, installed in the combustion chamber of a gas grill appliance, characterized in that the heat chamber (1) is a profile sheet in the form of a metal frame, with two long and two short sides, with an open upper base (2) and an open lower base (3) of variable length, width and height, scorched onto the burner tube (8) of a burner system, installed in the combustion chamber of a gas grill appliance and covered with a burner cover (9)

Description

[0001] -The innovation concerns a heat chamber, a profile sheet in the form of a metal frame, with two long and two short sides, with an open top and bottom, with variable length, width and height, recessed onto the burner tube of a burner system, installed in the combustion chamber of a gas grill, covered with a burner cover, a system for capturing, transferring and distributing the heat generated by the burner tube, from the heat source to the grill grate.

[0002] In currently known gas grills, one or more burner units, consisting of one or more burner tubes, are installed in the combustion chambers below the grill grate and above the grease tray. Each of these burner tubes is covered by a burner cover. The burner cover is positioned above the burner tube, over the flame area of ​​the burner tube, in such a way that it completely covers the flame area produced by the respective burner tube. -The burner cover has the task of protecting the burner tube and the perforations attached to it, also called nozzles, from falling grill residue and grease, and at the same time, partially transferring the heat generated under it by the burner tube to the grill grate. -Unfortunately, due to the necessary installation of the burner cover, in addition to the aforementioned positive aspects,

[0003] The following effects have been achieved, including negative effects: a-The natural airflow of the heat generated by the burner tube is interrupted by the installation of the burner cover, resulting in a chaotic mixture of the incoming fresh air and the heat generated by the burner tube, which, after heating up, permanently seeks its way upwards towards the grill grate. b-The temperature of the fresh air must be heated to an optimal grilling temperature by means of the heat generated by the burner tube, whereby the ratio between the incoming fresh air and the amount of heat generated by the burner tube is approximately "200 to 300" parts fresh air to one part heat generated by the burner tube. c-The large difference between the volume of fresh air supplied and the heat generated by the burner tube has the following far-reaching disadvantages: It takes a considerable amount of time to heat up the air in the combustion chamber to the optimal temperature necessary for optimal grilling. This heating phase, which is continuous from the moment the gas grill is switched on until it is switched off, results in high gas consumption. d-If one calculates the volume of fresh air entering the combustion chamber of a gas grill from the moment it is switched on, and separately the volume of heat generated by the burner tube, it can be determined that the ratio between the two is approximately 250 parts fresh air to 1 part generated heat. Since the fresh air enters the combustion chamber at an average temperature of 20°C and the heat generated by the burner tube is approximately 800°C, a large amount of generated heat is required to heat the continuously entering fresh air to an optimal grilling temperature of at least 330°C. It is therefore a fact that, according to current technology, the gas consumption for gas grills, based on current official consumer figures, is between 70 and 80 grams of gas per kilowatt (kW), and is correspondingly high. e- Regarding the quality of the heat generated by this technique, within the gas grill up to the grill grate, a temperature of 400 to 450''C is not achievable unless the kW rating of the burner tube is increased, or a cover in the form of a lid is erected over the entire grill grate, whereby even in this case the heat quality cannot be compared with the embers of a charcoal grill. - We can conclude from this that, in a gas grill, the fresh air, which flows unimpeded into the combustion chamber of a gas grill appliance, partly directly and partly indirectly to the heat source, is heated by it and thus forms heat with a low heat density and at the same time with low heat quality. Considering the prior art described above, the inventor's task is to create a new system that eliminates the aforementioned shortcomings. The new system, in relation to the currently applied technology and its negative consequences, exhibits the following improvements: 1-The heat generated by a burner tube of a burner system is no longer interrupted on its way towards the grill grate, for which reason no heat build-up can occur. 2-With the new system, the incoming fresh air is no longer heated; the heat generated by the burner tube is captured by means of the heat chamber and distributed directly, partly via the burner cover and partly via the two exhaust gas vents, towards the grill grate. 3-Of the continuously entering fresh air, only a small portion is admitted through the two fresh air inlets. This is the amount of fresh air necessary to ensure optimal combustion of gas and air on the burner tube. The remaining fresh air acts as a catalyst, assisting the heat exiting the combustion chamber on its way to the grill grate. This remaining fresh air cannot mix with the heat generated by the burner tube within the combustion chamber because this heat has a high heat density, comparable to the embers of a charcoal grill. 4- Between the heat chamber and the burner tube, a fresh air lock is installed on both sides in such a way that, according to its settings, only the necessary fresh air for optimal combustion passes through. 5-The use of the new system, the heat chamber, means that up to 90% of the heat generated by the burner tube reaches the grill grate directly, without heating the normally entering fresh air, thus achieving a reduction in gas consumption of up to 45%. This figure only refers to grilling with the lid on; for standard grilling without the lid, gas consumption is only about 10 to 15% lower compared to the stated gas consumption figures for gas grills, which, with the current state of the art, are between 70 and 80 grams of gas per 1 kW. 6-The heat generated by the heat chamber contributes significantly to ensuring that the quality of the grilled food is equivalent to that of food grilled on a charcoal grill. 7-Gas grill appliances with built-in heat chamber can be used both with and without a lid.

[0004] The following section describes the heat chamber. -The heating chamber is a profiled sheet, in the form of a metal frame with variable length, width and height, with an open upper and an open lower base, made of black sheet metal or other types of sheet metal with a thickness of 0.5 to 4 mm, preferably 1.5 mm. -The length of the heat chamber should encompass the entire flame area of ​​the burner tube installed beneath it, with the two short sections being located between 0 and 70 mm away from the flame ends, preferably 10 mm. -The height of the heating chamber is up to 4 times the diameter of the respective burner tube located inside the heating chamber, preferably 3 times. -The width of the heating chamber is determined by the diameter of the burner tube and the distance between the left and right long sides of the heating chamber and the burner tube, which should be between 2 mm and 60 mm, preferably 12 mm for a two-flame built-in burner tube and 10 mm for a single-flame built-in burner tube. -The two short sides of the heating chamber must be cut out in the lower area according to the shape of the burner tube, but always at least 1 mm larger, so that the cut-out part can be scorched onto the burner tube. -The burner tube should be installed inside, or partially outside, the heating chamber, at a distance of up to 20 mm below and 40 mm above the lower open base, preferably on the open lower base. Between the heating chamber and the burner tube, along its length, an opening is formed on each side, which is referred to as a fresh air lock. The size of the opening in these fresh air locks depends on the distance between the two long sides of the heating chamber and the burner tube. The size of these openings regulates the amount of fresh air required for optimal combustion. The heating chamber is covered with a burner cover. Depending on the gas grill model, the burner cover can be perforated or unperforated. The width of each of the two legs of the burner cover should be between 30 mm and 140 mm, preferably 55 mm. The distance of the burner cover from the apex of the angle to the open upper surface of the heating chamber should be between 10 mm and 80 mm, preferably 30 mm, and the angle of the burner cover should be between 80° and 175°, preferably 145°. The two longitudinal openings formed between the burner cover and the heating chamber are called exhaust vents. Depending on the gas grill and manufacturer, the two long sides of the warming chamber can be installed even without the short side. However, the specified dimensions for installation must be observed and applied. Using the warming chamber without the short sides results in higher gas consumption and heat with a lower heat density.

[0005] The following is a description of the function of the heat chamber.

[0006] As described above, the heat chamber is a profile sheet with variable length, width and height, in the form of a metal frame with two long sides, two short sides and an open upper and open lower base, covered with a perforated or unperforated burner cover, suitable for installation on all burner tubes of the burner systems, installed in the combustion chambers of standard gas grill devices. The heat source for all commercially available gas grills is the burner tube. Each burner tube, regardless of the manufacturer, has a certain power output (in kW) depending on its design. Current technology fully utilizes this generated heat to achieve the optimal grilling temperature at the grill grate. The incoming fresh air, which only partially reaches the burner tube, circulates throughout the entire combustion chamber of the gas grill until the desired grilling temperature is reached. This process takes longer and results in higher gas consumption.

[0007] In this new technology, the heat chamber is the component that transfers the heat generated by the burner tube directly to the grill grate, eliminating the need to preheat the incoming fresh air. This can reduce gas consumption by up to 45%. A far more significant advantage of the heat chamber is its ability to generate a particularly intense heat with a high heat density. Only a small fraction of the incoming fresh air is used, filtered through the two airlocks, to achieve optimal gas combustion in the burner tube. The generated heat, along with the exhaust gases produced by the burner tube, is collected in the heat chamber, which is scorched around the burner tube. From there, it reaches the burner cover and subsequently escapes through the exhaust vents towards the grill grate.The heat captured by the burner cover is transferred to the grill grate in the form of heat rays, while the remaining heat, along with the exhaust gases produced, reaches the grill grate directly via the exhaust vents.

[0008] The quality of the heat generated by the burner tube is achieved by adjusting the distance between the left and right long sides of the heat chamber and the left and right sides of the burner tube. This adjustment enlarges or reduces the fresh air intake, thus allowing a greater or lesser amount of fresh air to flow to the flames of the burner tube. The amount of fresh air must be adjusted to ensure optimal combustion of the gas.

[0009] By diverting a minimal amount of the total incoming fresh air—necessary for optimal gas combustion via the burner tube—through the fresh air inlets, a unique, highly dense heat is generated within the heating chamber. Up to 90% of this heat, with its high thermal density, reaches the grill grate, accompanied by temperatures up to 450°C. Since the incoming fresh air has a minimal thermal density, it does not mix with the highly dense heat generated in the heating chamber and thus serves only a supplementary function. The result is a reduction in gas consumption of up to 45%. It is now possible to operate a standard grill without a lid, reducing gas consumption by up to 15%.

[0010] Heat with a high degree of heat density is comparable to the high quality of heat from a charcoal grill, which is also referred to as embers. Brief description of the figures depicted. Fig. Figure 1 shows a cross-section of the heat chamber, as well as the burner tube and the burner cover. Fig. Figure 2 shows, in perspective view, the heat chamber, the burner tube, covered with the burner cover. Fig. Figure 3 shows the heat chamber and the burner tube in a perspective view. Fig. Figure 4 shows the burner cover in perspective view.

[0011] Based on the figures described above, a detailed description of the heat chamber and its function follows.

[0012] -The heating chamber 1, as in Fig. 1, Fig. 2 and Fig.3 is a profile sheet similar to a metal frame with variable length, width, and height, featuring an open upper base 2 and an open lower base 3. The heat chamber is scorched onto the burner tube 8 in such a way that the entire flame area of ​​the burner tube 8 is enclosed. The burner tube 8 is installed within the heat chamber 1 so that the latter rests on the lower open base 3. The width of the left and right fresh air inlets 4 and 5 is determined by the longitudinal distance between the burner tube 8 and the left and right sides of the heat chamber 1. The size of the openings of the two fresh air inlets 4 and 5 determines the amount of fresh air reaching the burner tube 8. The left and right exhaust air inlets 6 and 7 are determined by the left and right upper sides, lengthwise, of the heat chamber 1 and the left and right sides, lengthwise, of the burner cover 9.

[0013] The distance between burner cover 9 and the heating chamber 1 determines the amount of exhaust gases emitted.

[0014] The heat chamber, installed in a gas grill according to the instructions above, allows for the creation of highly concentrated heat and a temperature of up to 450°C directly under the grill grate. Using a standard gas grill with a lid, gas consumption can be reduced by up to 45%. The same gas grill can also be used for standard grilling without a lid, with gas consumption reduced by up to 15%.

[0015] All data provided was verified using a gas grill and is accurate. Reference symbol list 1 1 heating chamber 2 Open top base 3 Open bottom base 4 Left fresh air lock 5 Right Fresh Air Lock 6 Left exhaust valve 7 Right exhaust valve 8 burner tube 9 Burner cover 10 Width of the leg of the burner cover 11 angles of the burner cover 12 Long side of the heat chamber 13 Short side of the heat chamber 14 Excerpt

Claims

[1] Heat chamber (1) for capturing, transferring and distributing the heat generated by a burner tube (8) of a burner system, installed in the combustion chamber of a gas grill appliance characterized by that the heat chamber (1) is a profile sheet in the form of a metal frame, with two long and two short sides, with an open upper base (2) and an open lower base (3) with variable length, width and height, scorched onto the burner tube (8) of a burner assembly, installed in the combustion chamber of a gas grill appliance and covered with a burner cover (9) [2] Heat chamber (1) for capturing, transferring and distributing the heat generated by a burner tube (8) of a burner system, installed in the combustion chamber of a gas grill device according to claim 1 characterized by, that the heating chamber (1) is a profile sheet in the form of a metal frame made of black sheet metal, or other types of sheet metal with a thickness between 0.5 mm and 4 mm, preferably 1.5 mm. [3] Heat chamber (1) for capturing, transferring and distributing the heat generated by a burner tube (8) of a burner system, installed in the combustion chamber of a gas grill device according to claim 1-2 characterized by , that the heat chamber (1) covers the entire flame area of ​​the burner tube in length, wherein the two short sides (13) can be between 0 mm and 70 mm away from the flame ends, preferably 20 mm. [4] Heat chamber (1) for capturing, transferring and distributing the heat generated by a burner tube (8) of a burner system, installed in the combustion chamber of a gas grill device according to claims 1-3 characterized by, that the height of the heat chamber (1) can be up to 4 times the diameter of the respective burner tube accessed below it, preferably 3 times. [5] Heat chamber (1) for capturing, transferring and distributing the heat generated by a burner tube (8) of a burner system, installed in the combustion chamber of a gas grill device according to claims 1-4 characterized by , that the width of the heating chamber (1) results from the diameter of the installed burner tube (8), plus the distance between the left long side (12) and the right long side (12) of the heating chamber (1) and the burner tube, and can be between 2 mm and 60 mm, preferably 12 mm, for a burner tube with a double row of flames, and between 2 mm and 50 mm, preferably 10 mm, wherein the left opening (4) and the right opening (5) are designated as fresh air locks. [6] Heat chamber (1) for capturing, transferring and distributing the heat generated by a burner tube (8) of a burner system, installed in the combustion chamber of a gas grill device according to claims 1-5 characterized by , that the burner tube, inside or partially outside, the lower two short sides (13) of the heating chamber (1), can be between 20 mm outside the lower base side and 40 mm inside the lower base side, preferably on the base side, wherein the cutout (14) of the two short sides must be such that it is at least 1 mm larger than the burner tube in question, so that the heating chamber (1) can be scorched onto the burner tube. [7] Heat chamber, (1) for capturing, transferring and distributing the generated heat of a burner tube (8) of a burner system installed in the combustion chamber of a gas grill appliance characterized by, that the heating chamber (1) is covered with a burner cover (9) which can be perforated or unperforated, preferably unperforated, wherein the width of one leg (10) should be between 30 mm and 140 mm, preferably 55 mm, and the distance of the angle apex (11) to the open upper base (2) can be between 10 mm and 80 mm, preferably 30 mm, the angle of the burner cover (9) should be between 80° and 175°, preferably 145°, wherein the two openings formed between the open upper base (2) of the heating chamber (1) and the burner cover (9) are designated as the left exhaust gas lock (6) and the right exhaust gas lock (7). [8] Heat chamber (1) for capturing, transferring and distributing the heat generated by a burner tube (8) of a burner system installed in the combustion chamber of a gas grill appliance characterized by, that the heat chamber (1), with regard to the various types of gas grill appliances, can in exceptional cases also be installed without the short sides (13), provided that the specified dimensions must be observed, whereby in this case the gas consumption increases and the heat achieved can be obtained with a lower heat density.

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