DESC:FIELD OF INVENTION
[0001] The present invention relates, in general, to stoves or cooking appliances. More particularly, the present disclosure relates to burner assemblies, mounted to a cooktop of a cooking appliance.
BACKGROUND
[0002] Cooking appliances are used in several households, indoor and outdoor kitchens, hotels, etc., for cooking food, and/or the like activities. A cooking appliance may include a cooktop that may define a cooktop surface. A cooktop surface may define one or more slots to correspondingly position burner assemblies therewithin. A burner assembly may help to generate a flame which may be brought into contact with any item such as a utensil, a vessel, etc., to impart heat to the item, e.g., to cook the item.
[0003] During operations of the cooking appliance, components of the heat produced by the flame is often spread into the cooktop surface which may undesirably raise the temperature of the cooktop surface. Such a phenomenon may cause discomfort and/or injury to a user, e.g., if the user were to get unduly close to the cooktop surface and/or come into contact with the cooktop surface. Also, if a material possessing a relatively low temperature were to contact the cooktop surface during the operation, an increased temperature difference, thus sustained by the cooktop surface, may shorten the life of the cooktop surface, e.g., may break or fracture the cooktop surface, e.g., if the cooktop surface is made from a form of glass.
SUMMARY
[0004] According to an aspect of the present disclosure, a cooking appliance is described. The cooking appliance includes a cooktop and at least one burner assembly. The cooktop includes a planar surface and a at least one slot. The burner assembly may be positioned at least partly within the slot of the cooktop. The burner assembly may include an annular mixing chamber and a burner mounted on the annular mixing chamber. The annular mixing chamber may receive a pressurized volume of a fuel mixture. The one or more annular arrays of ports lie in fluid registration with the annular mixing chamber and provide an exit to the pressurized fuel mixture from the burner for ignition thereof. The annular arrays of ports further include a first array of port closest to the annular mixing chamber, and a height of the first array of ports is at least 23.2 millimeters (mm) from the planar surface.
BRIEF DESCRIPTION OF THE DRAWINGS
[0005] FIG. 1 is an exemplary side cross-sectional view of a cooking appliance, in accordance with which various embodiments of the present disclosure may be implemented;
[0006] FIG. 2 is an exemplary perspective cross-sectional view of the cooking appliance of FIG. 1, in accordance with the embodiment of the present disclosure;
[0007] FIG. 3 is a close-up view of annular arrays of ports of a burner associated with the cooking appliance of FIG. 1, in accordance with the embodiment of the present disclosure; and
[0008] FIGS. 4 and 5 are exemplary cross-sectional views illustrating different components of the cooking appliance of FIG. 1, in accordance with the embodiment of the present disclosure.
[0009] Persons skilled in the art will appreciate that elements in the figures are illustrated for simplicity and clarity and may have not been drawn to scale. For example, the dimensions of some of the elements in the figure may be exaggerated relative to other elements to help to improve understanding of various embodiments of the present disclosure.
DETAILED DESCRIPTION
[0010] Reference will now be made in detail to specific embodiments or features, examples of which are illustrated in the accompanying drawings. Generally, corresponding reference numbers may be used throughout the drawings to refer to the same or corresponding parts could refer to one or more comparable components used in the same and/or different depicted embodiments.
[0011] Referring to FIG. 1, an exemplary cooking appliance 100 is shown and described. The cooking appliance 100 may be used, e.g., by one or more personnel or a human user, to produce a flame F and generate heat so as to cook food or any item by using the heat. In some embodiments, the cooking appliance 100 may include at least one knob (not shown) to produce the flame F. Terms such as ‘cook’ or ‘cooking’, and similar such terms, as used in the present disclosure, may correspond to or include a way of preparing (e.g., mixing, combining, blending, etc., one or more food articles with each other) by use of the heat from the flame F. Terms such as ‘heat’ or ‘heating’, as used in the present disclosure, may include, but are not limited to, boiling, baking, roasting, and grilling, e.g., of one or more food articles (that may be placed inside a vessel or a container, see item 102) and which may be brought into contact with a flame F for cooking. Heat from the flame F could be used for other purposes as well, and the above discussion is exemplary.
[0012] The cooking appliance 100 may include various components and/or assemblies that may cooperate to perform the cooking. It is to be understood that the term “cooking appliance” is to be interpreted broadly as including not only self-contained units that are mounted in or onto a countertop or a tabletop surface, but also appliances that form part of larger cooking appliances, such as a stove, a commercial cooking unit, a cooking unit that may be integrated with other systems for the performance of other functions, etc. For example, as shown in FIG. 1, the cooking appliance 100 may include a body B, a cooktop 104 placed on the body B, and a plurality of legs 110 disposed under the body B. The legs 110 may be used to station the cooktop 104 (and thus the cooking appliance 100) over the countertop or the tabletop surface (which may be a flat surface). In some embodiments, the cooktop 104 may include and/or be made of a toughened glass, and, as an example, the toughened glass may define a thickness, T, of up to 6 millimeters (mm), as per Indian standards i.e., IS 2553 standards. Further, the cooking appliance 100 may include a tube, e.g., a venturi tube 162 installed under the cooktop 104 and inside the body B. The venturi tube 162 may include one or more openings 164 and may be fluidly coupled with an injector jet 158 (as shown in FIG. 2). In some embodiments, the cooking appliance 100 may receive a fuel (and/or a fuel mixture), such as a liquified petroleum gas (LPG), from the injector jet 158 inside the venturi tube 162. Ignition of the fuel may produce combustion, resulting in the flame F that may be used to impart heat to the item 102, i.e., the item 102 may be brought into contact with the flame, F, for cooking.
[0013] The cooktop 104 may include a cooktop surface or a planar surface 108, at least one slot 112 having a longitudinal axis A, and at least one burner assembly 116 positioned at least partly within the slot 112, having the axis A. In some embodiments, the slot 112 may be a cut out section from the planar surface 108 of the cooktop 104, which may adopt various shapes that may include, but not limited to, a circular, a rectangular, a triangular, and others as required. The burner assembly 116 may be positioned within the slot 112, e.g., such that their longitudinal axes align and overlap. In some embodiments, the cooking appliance 100 may include a support 146 positioned around the burner assembly 116 mounted on the planer surface 108. During cooking, the item 102 may be placed on the support 146 such that the item 102 may be in a contact with the flame, F, for heat transfer.
[0014] Referring to FIG. 2, the burner assembly 116 may include an annular mixing chamber 120 and a burner 124 mounted on the annular mixing chamber 120. For instance, the annular mixing chamber 120 (thus the burner 124) may be fluidly coupled with the venturi tube 162 to receive the fuel (and/or the fuel mixture) from the injector jet 158 inside the annular mixing chamber 120 (will describe later in detail). In some embodiments, the annular mixing chamber 120 (thus the burner assembly 116) may be coupled with the cooktop 104 via a mounting plate 134. The mounting plate 134 may include a first portion coupled with the annular mixing chamber 120 and a second portion coupled with the cooktop 104 via one or more fastening means. In an example, once aligned, the mounting plate 134 may be fixedly coupled with the annular mixing chamber 120 via one or more fastening means 142. The fastening means 142 may be securely passed through one or more corresponding openings 138 (as shown in FIG. 4) that may be present in the mounting plate 134 and the annular mixing chamber 120. In some embodiments, the mounting plate 134 may include any suitable shape including, but not limited to, circular, rectangular, etc.
[0015] Referring to FIG. 2, the annular mixing chamber 120 may include an outer wall 121, an inner wall 123, and an annular hollow interior 122 defined in between the outer wall 121 and the inner wall 123. In some embodiments, the annular mixing chamber 120 may be any ring-shaped or a donut-like structure that may define the annular hollow interior 122 with the outer wall 121 and the inner wall 123. In some embodiments, the annular hollow interior 122 may define a varying cross-section with a first chamber portion C1 and a second chamber portion C2. For example, the first chamber portion C1 may have a first depth a, and the second chamber portion C2 may have a second depth b, along an axial length of the annular hollow interior 122 (as shown in FIG. 4). In some embodiments, the first depth a is greater than the second depth b. For example, the first depth a may be in a range of 53 mm to 55 mm and the second depth b in a range of 25 mm to 27 mm along the axial length of the annular hollow interior 122. In some embodiments, the first chamber portion C1 (thus the first depth a) may be positioned closer to the venturi tube 162, and the second chamber portion C2 (thus the second depth b) may be positioned farther away from the venturi tube 162. In such configuration, the fuel (and/or the fuel mixture) from the injector jet 158, via the venturi tube 162, may first supplied to the first chamber portion C1 and then to the second chamber portion C2.
[0016] The burner 124 may be wider at its base and tapered towards its top. The burner 124 may have a frustoconical crown portion 126 that may define a thickness, t, and the axis A (as shown in FIG. 2). In some embodiments, the burner 124 includes a top surface may be formed at a height of not greater than 29.5 mm with respect to the planar surface 108 of the cooktop 104. The frustoconical crown portion (126) may include an outer peripheral surface 128, an inner peripheral surface 130, and a recess 132 in between the outer peripheral surface 128 and the inner peripheral surface 130 (as shown in FIG. 3). The outer peripheral surface 128 and the inner peripheral surface 130 may be wider at base and tapered towards top that may result in the frustoconical shape of the burner 124. In some embodiments, the burner 124 may include one or more annular arrays of ports P, as shown in FIG. 1. The ports, P, may be defined by openings that may be arranged in a circular pattern around the axis, A, and on the outer peripheral surface 128. In some embodiments, each port, P, may be of any suitable shape, including but not limited to, a circular shape, and include a center (not shown). In some embodiments, each array of ports of the one or more annular arrays of ports P may be planarly defined. Further, the ports P may be layed in fluid registration with the annular mixing chamber 120. For example, the fluid (e.g., fuel or fuel mixture) present in the annular mixing chamber 120 may be passed through the ports P of the burner 124. Further, the burner 124 may include a number and size of the ports that may be varied to influence intensity and spread of the flame F which may be brought into contact with any item 102. In some embodiments, each port of the annular arrays of ports P may include a diameter d in a range of 1.7 mm to 1.9 mm. In some embodiments, the annular arrays of ports P may be concentrically positioned to each other and may be serially arranged, e.g., one above the other, along an elevation, E, of the burner 124. In so doing, the annular arrays of ports P may include a first array of ports P1 and a second array of ports P2, along the elevation E.
[0017] In an example, the first array of ports P1 and the second array of ports P2 may be structured and arranged on the outer peripheral surface 128. In some embodiments, the first array of ports P1 may correspond to a lowermost array of ports and the second array of ports P2 may correspond to an uppermost array of ports on the outer peripheral surface 128 of the burner 124. For instance, the first array of ports P1 may be provided closest to the annular mixing chamber 120 and the second array of ports P2 may be provided farthest to the annular mixing chamber 120. In some embodiments, the first array of ports P1 may be formed at a height H1 of at least 23.2 mm with respect to the planar surface 108 of the cooktop 104. Further, the second array of ports P2 may be formed at a height H2 not greater than 28.9 mm with respect to the planar surface 108 of the cooktop 104. Accordingly, a distance between two consecutive arrays of ports may also be calculated by determining difference between the heights i.e., H2 – H1. In some embodiments, the annular arrays of ports P may include at least one inner array of ports P3 that may be arranged on the inner peripheral surface 130 (as shown in FIGS. 4 and 5). In some embodiments, the above heights H1 and H2 may extend from the planar surface 108 to the center of the port P. In some embodiments, referring to FIG. 1, the burner 124 may be one of a jumbo-sized burner having a diameter D in a range of 88 to 92 mm or one of a medium-sized burner having a diameter D in a range of 76 to 80 mm.
[0018] The support 146 may correspond to a grate or a closed loop structure made from metal and may be positioned on the cooktop 104 with the burner assembly 116 in middle. The support 146 may include a support surface 150 to hold the item 102 thereon (as shown in FIG. 1). In some embodiments, as clearly shown in FIG. 2, the support 146 may include a plurality of bars arranged at a height, in a continuous pattern, and radiating partially toward a center of the support 146. For example, the support surface 150 may be positioned at a height H3 in a range between maximum of 50.2 mm and minimum of 48.2 mm with respect to the planar surface 108. In some embodiments, the support 146 may include a gap between two consecutive bar such that, the bars are evenly spaced above and around the burner assembly 116. Accordingly, the item 102 may be positioned on the support 146 at a height of H3 with respect to the planar surface 108 for an optimal thermal efficiency. Thus, the height H3 ensures the heat from the flame F is efficiently utilized, and reduce heat spread and/or convection of heat into the planar surface 108 (thus the cooktop 104).
[0019] The first array of ports P1, positioned at the height H1, and the second array of ports P2, positioned at the height H2, may create an optimized production and distribution of the flame F. The optimized production and distribution of the flame F may provide heat to the item 102 when the item 102 may be placed, above the flame F, on the support surface 150, at the height H3. In this regard, the cooking appliance 100 (through H1, H2, and H3) may minimize heat loss that may otherwise occur through the convection of the heat to the planar surface 108 of the cooktop 104 thus, ensuring the heat from the flame F is effectively utilized. With the heights H1, H2, and H3, and/or by minimizing the heat loss, the cooking appliance 100 may help achieve an optimal or an improved thermal efficiency. Moreover, the cooking appliance 100 with said arrangement of the heights H1, H2, and H3 results in an improved performance of the burner assembly 116. Further, the heights H1, H2, and H3, help minimize soot formation, e.g., on the item 102. In other words, the heights H1, H2, and H3, help the cooking appliance 100 achieve a synergy or a synergistic balance between the parameters of convective heat spread from the flame, F, into the planar surface 108, soot formation on the item 102, and thermal efficiency by ensuring each of – a reduction of the convective heat spread into the planar surface 108, a mitigation of the soot formation on the item 102, and a maintenance or an improvement of the thermal efficiency.
[0020] In some embodiments, the cooking appliance 100 may include an annular drip tray 154. The annular drip tray 154 may be a ring-shaped element and may be positioned around the burner 124. In an example, the annular drip tray 154 may be a circular, shallow tray with an inner diameter and an outer diameter and may create a funnel like shape. In some embodiments, the annular drip tray 154 may be positioned between the support 146 and the annular mixing chamber 120 (thus the burner 124). During cooking, the annular drip tray 154 may be configured to catch spills and drips that may be overflowed or dropped from the item 102. The annular drip tray 154 may prevent any spillage/drips from reaching and damaging the burner 124 and the annular mixing chamber 120. Additionally, the annular drip tray 154 may simplify cleaning processes and help in maintain a neat and tidy appearance for the cooking appliance 100.
[0021] Referring to FIG. 4 and FIG. 5, working of the cooking appliance 100 is discussed. The personnel or the human user may turn the knob of the cooking appliance 100 to control the fuel flow to the burner assembly 116. In some embodiments, the injector jet 158 may be configured to receive the fuel from a fuel cylinder or a fuel pipeline via a conduit 168. For example, upon turning the knob, the fuel cylinder or the fuel pipeline may supply a pressurized volume of the fuel (and/or the fuel mixture) to the burner assembly 116. In such scenario, the injector jet 158 may supply the pressurized volume of a fuel mixture to the annular mixing chamber 120 via the venturi tube 162. The fuel mixture from the annular mixing chamber 120 may be passed through the thickness, t, to reach the frustoconical crown potion 126. Upon reaching the frustoconical crown portion 126, the arrays of ports P (layed in fluid registration with the annular mixing chamber) may provide an exit to the pressurized volume of the fuel mixture from the burner 124 for ignition thereof. For example, when the fuel (and/or the fuel mixture), from the injector jet 158, flows inside the venturi tube 162, its velocity increases and pressure decreases, and draws air from the opening 164. This may result in formation of an air-fuel mixture within the annular mixing chamber 120. The air-fuel mixture may then exit from the arrays of ports P. Subsequently, the personnel or the human user may produce a spark, which then ignite the air-fuel mixture to produce the flame F (as shown in FIG. 1) above the burner 124. In some embodiments, the spark may be produced by using an electric spark generator or a piezoelectric igniter to ignite the air-fuel mixture.
[0022] In some embodiments, the first chamber portion C1 may receive the pressurized volume of the fuel mixture from the venturi tube 162. Subsequently, the pressurized volume of the fuel mixture may travel across the varying cross-section of the annular hollow interior 122 of the annular mixing chamber 120. This may result in optimal mixing of air and the fuel within the annular mixing chamber 120.
[0023] An exemplary method for assembling the burner assembly 116 and the cooktop 104 of the cooking appliance 100 is disclosed. The method includes positioning the annular mixing chamber 120 at least partly within the slot 112 of the cooktop 104. The method includes mounting the annular mixing chamber 120 with the cook top 104 using the mounting plate 134. The method includes coupling the injector jet 158 to the venturi tube 162 of the annular mixing chamber 120. The method includes mounting the burner 124 on the annular mixing chamber 120. Such that, the annular mixing chamber 120 (thus the burner 124) may be fluidly coupled with the venturi tube 162 to receive the fuel (and/or the fuel mixture) from the injector jet 158 inside the annular mixing chamber 120. Further, the method includes positioning the burner 124 such that the first array of ports P1 are at a height H1 of at least 23.2 mm with respect to the planar surface 108 and the second array of ports P2 are at a height H2 not greater than 28.9 mm with respect to the planar surface 108. In some embodiments, each port of the arrays of ports P (of diameter d) is in a range of 1.7 mm to 1.9 mm. Further, the method may include positioning the support surface 150 at a height H3 in a range between maximum of 50.2 mm and minimum of 48.2 mm with respect to the planar surface 108.
INDUSTRIAL APPLICABILITY
[0024] The cooking appliance 100, having the cooktop 104 made of a glass, e.g., a toughened glass, the burner assembly 116 (including the annular mixing chamber 120), and the support 146, focuses on safety features for the one or more personnels and/or the human user. In this regard, the cooking appliance 100 includes the injector jet 158 to supply the pressurized volume of the fuel mixture inside the annular mixing chamber 120 via the venturi tube 162. The fuel mixture from the annular mixing chamber 120 is passed through the thickness, t, to reach the frustoconical crown potion 126. Upon reaching the frustoconical crown portion 126, the arrays of ports, P, (layed in fluid registration with the annular mixing chamber) provide an exit to the pressurized volume of the fuel mixture from the burner 124 for ignition thereof. Upon igniting and producing the flame, F, the cooking appliance 100 reduces excessive heating of the planar surface 108 of the cooktop 104. Accordingly, the cooking appliance 100 facilitates generation of the flame, F, from the ports P at a sufficient distance(s), H1 and/or H2, from the planar surface 108, thus, reducing the heating of the planar surface while also ensuring thermal efficiency is met. In that manner, the cooking appliance 100 results in reduction of waste heat that does not contribute to cooking. Moreover, the cooking appliance 100 significantly enhances safety of the personnel or the human user by minimizing risk of burns without compromising the thermal efficiency and overall performance of the cooking appliance 100.
[0025] In this regard, due to optimal heights H1, H2, and H3 of the one or more annular arrays of ports P1 and P2 of the burner 124, and the support surface 150, the cooking appliance 100 minimizes heat convection to the glass cooktop 104, achieving a temperature reduction of up to 10º C (see experimental data in Table 1 below). This further improves the combustion of the air-fuel mixture. Further, the experimental data, as shown in Table 1 below, shows temperature comparisons between traditional and the present cooking appliances. Table 1 demonstrates a consistent temperature difference of at least 10º C, with an optimal heights (H1, H2, and H3).
Table 1
Temperature Comparison of Planar surfaces of Cooktops
Different Burner Sizes Existing Cooking Appliances Cooking Appliance of the Present Invention
Temperature in Deg. C Temperature in Deg. C
1 87 71
2 107 63
3 68 58

[0026] In view of the above, the test was performed for the burners 1, 2, 3, which correspond to the burners of different sizes. In this regard, the burner 1 may correspond to the jumbo-sized burner, the burner 2 may correspond to the small-sized burner, and the burner 3 may correspond to the medium-sized burner. The burners 1, 2, 3 were provided on the cooking appliance 100 may be at different position with respect to each other.
TEST 1
[0027] From the data as provided in Table 1, temperature test showed the effectiveness in practical scenarios of the present cooking appliance 100. The test further showed the enhanced uniformity of heat distribution and minimized heat loss, which improved cooking performance and energy efficiency of the cooking appliance 100. This not only addressed common issues of uneven cooking and excessive heat dissipation, but also provided a solution that was adapted to different sizes and types of item 102.
[0028] The reduced heat transfer to the planar surface 108 offers several industrial advantages. The risk of burns from contact with the cooktop surface or the planar surface 108 during use is significantly lowered, enhancing user safety. The reduced surface temperature allows for quicker cleaning, as the glass on the cooktop surface or planar surface 108 cools relatively faster, and decreases the likelihood of glass breakage due to thermal shock from contact with a relatively cold volume of water. Additionally, the lower surface temperature provides more usable space on the cooktop 104 and extends the lifespan of the cooktop glass.
TEST 2
[0029] Further, a fuel consumption test was performed. This test confirmed that each of the burner assembly 116, under separate 'ON/OFF' control, maintained fuel consumption within ±8 percent of the manufacturer’s declared fuel consumption. For example, with the jumbo-sized burner consuming 72 lph (litres per hour) (177 gph (grams per hour)) of fuel and the medium-sized burner consuming 57 lph (140 gph) of fuel were supplied. The tests indicated that the cooking appliance 100 did not affect gas consumption rates, ensuring it operates efficiently within the specified parameters.
TEST 3
[0030] In addition to above, a flashback test was conducted. This test verified that no flashback occurred during testing for all pressures ranging from 2452 kN/m² (kilonewton per meter square) to 3432 kN/m² (25 gf/cm² to 35 gf/cm² (gram per square centimetre)). This result underscored the safety and reliability of the cooking appliance 100 in various operating conditions, preventing unwanted heating and that mitigates user discomfort.
TEST 4
[0031] Additionally, the soot formation test was conducted. This test confirmed the efficiency and cleanliness of the operation by using the cooking appliance 100. In this regard, when a vessel (e.g., a 150 mm diameter vessel) filled with water was placed on the burner 124 at the maximum/minimum height, H3, and operated at the 'ON' position for one hour, no soot (unburned carbon) was deposited on the burner 124 or at the vessel's bottom, ensured clean combustion and reduced maintenance requirements.
TEST 5
[0032] Lastly, the thermal efficiency test was performed. This test demonstrated that the thermal efficiency for each burner 124 exceeded the minimum requirement of 68 percent. Both the jumbo-sized burner and the medium-sized burner achieved thermal efficiencies greater than 68%, without compromising performance of the cooking appliance 100. This high thermal efficiency ensured that the cooking appliance 100 is energy efficient, contributing to lower fuel consumption and operational costs.
[0033] To this end, the testing results substantiate the industrial applicability of the present invention and also illustrates that the aim to reduce heat transfer into the planar surface 108, mitigating soot formation on the item 102, attaining thermal efficiency greater than 68%, were all achieved by the cooking appliance 100, and that too without the need for any complex and/or bulky and/or expensive systems/sub-systems, thus significantly raising the economic value of the cooking appliance 100. Effectively, the cooking appliance 100 of the present invention not only enhances safety by reducing surface temperature of the planar surface 108 but also maintains high thermal efficiency, clean combustion, and reliable operation, making it a valuable innovation for modern kitchens.
[0034] In the preceding specification, the present disclosure and its advantages have been described with reference to specific embodiments. However, it will be apparent to a person of ordinary skill in the art that various modifications and changes can be made, without departing from the scope of the present disclosure, as set forth in the claims below. Accordingly, the specification and figures are to be regarded as illustrative examples of the present disclosure, rather than in restrictive sense. All such possible modifications are intended to be included within the scope of present disclosure.
,CLAIMS:We Claim:
1. A cooking appliance, comprising:
a cooktop defining a planar surface and at least one slot;
at least one burner assembly positioned at least partly within the at least one slot, the at least one burner assembly including:
an annular mixing chamber to receive a pressurized volume of a fuel mixture, the annular mixing chamber being coupled to the cooktop; and
a burner defining one or more annular arrays of ports that are serially arranged along an elevation of the burner, the one or more annular arrays of ports lying in fluid registration with the annular mixing chamber and providing an exit to the pressurized fuel mixture from the burner for ignition thereof, wherein
the one or more annular arrays of ports includes a first array of ports closest to the annular mixing chamber, and
a height (H1) of the first array of ports is at least 23.2 millimeters (mm) with respect to the planar surface.

2. The cooking appliance as claimed in claim 1, wherein each array of ports of the one or more annular arrays of ports is planarly defined.

3. The cooking appliance as claimed in claim 1, wherein the burner is one of a jumbo-sized burner having a diameter (D) in a range of 88 to 92 mm or a medium-sized burner having a diameter (D) in a range of 76 to 80 mm.

4. The cooking appliance as claimed in claim 1, wherein the one or more annular arrays of ports includes a second array of ports farthest to the annular mixing chamber, and a height (H2) of the first array of ports is not greater than 28.9 millimetres (mm) with respect to the planar surface.

5. The cooking appliance as claimed in claim 1, wherein a diameter of each port of the one or more annular arrays of ports is in a range of 1.7 mm to 1.9 mm.

6. The cooking appliance as claimed in claim 1, wherein the burner includes a frustoconical crown portion defining an outer peripheral surface and an inner peripheral surface, the one or more annular arrays of ports are defined on the outer peripheral surface, and the inner peripheral surface includes at least one inner array of ports.

7. The cooking appliance as claimed in claim 1, wherein the cooktop is made of a toughened glass.

8. The cooking appliance as claimed in claim 1, wherein the annular mixing chamber is coupled to the cooktop via a mounting plate.

9. The cooking appliance as claimed in claim 1 further including a support mounted on the cooktop and defining a support surface to position an item against the flame.

10. The cooking appliance as claimed in claim 9, wherein
a maximum height (H3) of the support surface is 50.2 mm with respect to the planar surface, and
a minimum height (H3) of the support surface is 48.2 mm with respect to the planar surface.

11. The appliance as claimed in claims 9, wherein an annular drip tray is provided between the support and the annular mixing chamber.

12. The appliance as claimed in claim 1, wherein the annular mixing chamber is coupled with an injector jet to provide an air fuel mixture via a venturi tube.

13. The appliance as claimed in claim 12, wherein the annular mixing chamber includes an annular hollow interior, wherein the annular hollow interior defines a varying cross-section with a first chamber portion and a second chamber portion, the first chamber portion being closer to the venturi tube and the second chamber portion being farther away from the venturi tube, the first chamber portion defining a first depth and the second chamber portion defining a second depth along an axial length of the annular hollow interior, wherein the first depth is greater than the second depth.