Stove burners and gas-heated cookers equipped with stove burners

Abstract

To prevent an occurrence of the burnt deposit and sticking of a cooked-food spilled soup, etc., to a burner head (12) of a cooking stove burner (10).SOLUTION: A fuel gas supplied to a burner body (11) is to be combusted at the external side of plural flame holes (15a and 15b) opened in an outer circumferential side surface (12b) of a burner head. Different surface treatments at an upper surface (12a) and the outer circumferential side surface are applied to the burner head. Since the surface treatments suitable for the upper surface of the burner head and for the outer circumferential side surface thereof, respectively, are applied from the standpoint of preventing the burnt deposit and sticking of a cooked-food spilled soup, etc., an occurrence of the burnt deposit and sticking of the cooked-food spilled soup, etc., can be prevented.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a stove burner having a burner head mounted on a burner body and a plurality of flame ports opening on the outer peripheral side surface thereof, and a gas heating cooker equipped with the stove burner. [Background technology]

[0002] In gas cooking appliances equipped with a stove burner, food is cooked by burning fuel gas in the stove burner. Here, the stove burner has a structure in which a ring-shaped burner head is placed on a burner body, and multiple flame ports are opened on the outer peripheral side of the burner head, so that fuel gas supplied to the burner body is ejected from the flame ports of the burner head and combusted.

[0003] In addition, in recent years, stove burners have tended to have higher heat output, which causes the burner head to become hot during cooking, making it easier for spilled liquid to burn on the top surface of the burner head or for moisture to evaporate and solidify. When burner heads become burned or solidified, cleaning them requires a lot of effort.

[0004] Therefore, a stove burner has been proposed in which the top surface of the burner head is sloped downward from the inside to the outside, so that even if cooking liquid or the like gets on the top surface of the burner head, the liquid is quickly drained to the outside of the burner head, thereby preventing burning or sticking (Patent Document 1). [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Publication No. 2020-153538 Summary of the Invention [Problem to be solved by the invention]

[0006] However, the stove burners proposed above have the problem of not being able to adequately prevent burning and sticking. This is because, due to restrictions mainly on the design of the stove burner, the angle of inclination of the top surface of the burner head cannot be made too large, and so when the viscosity of the spilled liquid increases, it is not possible to quickly drain the spilled liquid to the outside of the burner head.

[0007] This invention has been made to solve the above-mentioned problems of the conventional technology, and aims to provide a stove burner that can prevent the burning or adhesion of spilled liquid and the like to the burner head. [Means for solving the problem]

[0008] In order to solve the above-mentioned problems, the stove burner of the present invention employs the following configuration: A stove burner in which a ring-shaped or circular burner head having a plurality of flame ports on its outer peripheral side is placed on a burner body, and fuel gas supplied to the burner body is ejected from the flame ports of the burner head, thereby burning the fuel gas outside the flame ports. The burner head has different surface treatments on the outer peripheral side surface and the top surface. It is characterized by:

[0009] In the stove burner of the present invention described above, fuel gas supplied to the burner body is burned outside of multiple flame ports opening on the outer circumferential side of the burner head, and the outer circumferential side and top surfaces of the burner head are subjected to different surface treatments. From the viewpoint of preventing spilled liquid and the like from burning or adhering to the burner head, the outer circumferential side and top surfaces of the burner head have different desirable characteristics. Therefore, by subjecting the outer circumferential side and top surfaces of the burner head to different surface treatments, it is possible to apply surface treatments appropriate for each surface from the viewpoint of preventing spilled liquid and the like from burning or adhering to the burner head, and it is possible to prevent spilled liquid and the like from burning or adhering to the burner head.

[0010] In addition, in the stove burner of the present invention described above, the upper surface of the burner head may be shaped to be inclined downward from the center toward the outside in the radial direction.

[0011] In this way, spilled liquid or the like that has fallen onto the upper surface of the burner head can be quickly discharged to the outside of the burner head by its own weight, thereby preventing the spilled liquid or the like from burning or sticking.

[0012] Furthermore, in the stove burner of the present invention described above, the upper surface of the burner head may be subjected to a surface treatment that provides better thermal radiation properties than the outer side surface, and the outer side surface of the burner head may be subjected to a surface treatment that provides better insulation properties than the upper surface.

[0013] This prevents the burner head from becoming too hot even if the flames from the combustion of the fuel gas heat up the outer circumferential surface of the burner head. In addition, even if the temperature of the burner head becomes high, heat rays are emitted from the top surface of the burner head, preventing the temperature of the top surface from becoming too high. As a result, even if spilled liquid or the like gets on the top surface of the burner head, the spilled liquid or the like can be drained from the top surface of the burner head before it burns or sticks, making it possible to prevent burning or sticking.

[0014] Furthermore, in the stove burner of the present invention described above, the upper surface of the burner head may be subjected to a surface treatment that is more water-repellent than the outer side surface, and the outer side surface of the burner head may be subjected to a surface treatment that is more insulating than the upper surface.

[0015] This prevents the burner head from becoming too hot even if the flames from the combustion of the fuel gas heat up the outer periphery of the burner head. In addition, even if spilled liquid or the like falls on the top surface of the burner head, it is repelled by the top surface and quickly drained away. This makes it possible to prevent spilled liquid or the like from burning or adhering to the top surface of the burner head.

[0016] The stove burner of the present invention may be mounted on a gas-heated cooker.

[0017] In such a gas heating cooker, even if cooking liquid spills onto the burner head of the stove burner, it is possible to prevent the spill from burning or adhering to the burner head. [Brief explanation of the drawings]

[0018] [Figure 1] 1 is a perspective view showing the external shape of a gas stove 1 equipped with a stove burner 10 of this embodiment. [Figure 2] 1 is an explanatory diagram showing the state in which the upper part of the stove burner 10 of this embodiment protrudes from the top plate 3. FIG. [Figure 3] 1 is an explanatory diagram showing why the stove burner 10 of this embodiment can prevent scorching and sticking of spilled liquid and the like. [Figure 4] 10 is an explanatory diagram showing why the modified stove burner 10 can prevent scorching and sticking of spilled liquid and the like. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0019] Fig. 1 is a perspective view showing the external shape of a gas stove 1 equipped with a stove burner 10 of this embodiment. The gas stove 1 of this embodiment corresponds to the "gas heating cooker" of the present invention. The gas stove 1 shown in Fig. 1 is a built-in type gas stove that is installed by fitting it into an opening in a countertop of a system kitchen (not shown), and includes a box-shaped stove body 2 that is housed in the opening and a top plate 3 that is installed to cover the open top surface of the stove body 2.

[0020] Two burners 10 for burning fuel gas are installed side by side on the stove body 2. The burners 10 are installed with their tops protruding from insertion holes (not shown) formed in the top plate 3, and the gap between the burners 10 and the insertion holes is blocked by an annular burner ring 3a. A trivet 4 for placing a cooking vessel such as a pot is installed on the top plate 3, surrounding the burner 10. The upper part of a temperature sensor 5 protrudes from the top surface of the burner 10. The temperature sensor 5 is biased upward by a biasing spring (not shown), and its upper end abuts against the underside of a cooking vessel placed on the trivet 4 to detect the temperature of the vessel. An ignition plug 6 for igniting the burner 10 protrudes from the burner ring 3a.

[0021] A grill door 7 is provided on the front of the gas stove 1, and a grill compartment (not shown) is mounted behind the grill door 7. A user of the gas stove 1 can place food in the grill compartment and heat it for cooking by pulling the grill door 7 toward themselves. Two stove operation buttons 8 are provided to the right of the grill door 7. By operating the left stove operation button 8, a user can ignite the left stove burner 10 to start combustion, adjust the heat, or end combustion. Similarly, by operating the right stove operation button 8, the user can start combustion, adjust the heat, or end combustion of the right stove burner 10. In addition, a grill operation button 9 is provided to the left of the grill door 7, allowing a user to start combustion, adjust the heat, or end combustion of the grill.

[0022] 2 is an explanatory diagram showing an enlarged view of the portion of the stove burner 10 of this embodiment that protrudes from the burner ring 3a. As shown in the figure, the stove burner 10 has a structure in which a ring-shaped burner head 12 is placed on top of a roughly cylindrical burner body 11 whose upper portion protrudes from the burner ring 3a. The burner head 12 is formed by casting or die-casting using an aluminum alloy, brass, or the like, and has an insertion hole 13 in the center of the burner head 12 through which the aforementioned temperature sensor 5 is inserted.

[0023] The upper surface 12a of the burner head 12 is gently sloped from the central portion where the insertion holes 13 are open toward the outside, and the outer peripheral side surface 12b of the burner head 12 is formed with multiple main flame ports 15a and multiple auxiliary flame ports 15b that are smaller than the main flame ports 15a. Furthermore, a hood portion 12c protrudes radially outward from one portion of the outer peripheral side surface 12b, and a convex portion (not shown) called an ignition target is formed on the underside of the hood portion 12c. The ignition plug 6 ignites the fuel gas by throwing a spark toward the ignition target. The main flame port 15a and auxiliary flame port 15b in this embodiment correspond to the "flame port" in this invention.

[0024] In the stove burner 10 of this embodiment, the upper surface 12a of the burner head 12 is surface-treated, and the outer circumferential side surface 12b is also surface-treated in a different way from the upper surface 12a. The reason for the different surface treatments on the upper surface 12a and the outer circumferential side surface 12b is that the characteristics required for the upper surface 12a and the outer circumferential side surface 12b are different from the viewpoint of preventing scorching or adhesion of spilled liquid and the like. In the stove burner 10 of this embodiment, the upper surface 12a is surface-treated with a high thermal radiation property (e.g., an alumina-titania ceramic coating), and the outer circumferential side surface 12b is surface-treated with a high thermal insulation property (e.g., a microporous ceramic coating). This prevents scorching or adhesion of spilled liquid and the like to the burner head 12 for the following reasons.

[0025] FIG. 3 is an enlarged view showing the cross-sectional shape of the burner head 12 of this embodiment. In the figure, the flames formed in the main flame nozzle 15a and the auxiliary flame nozzle 15b are indicated by dashed lines. As the flames are formed just outside the main flame nozzle 15a and the auxiliary flame nozzle 15b, the outer peripheral side surface 12b of the burner head 12 receives radiant heat from the flame, causing the temperature of the burner head 12 to rise. The thick straight arrows in the figure indicate the outer peripheral side surface 12b of the burner head 12 being heated by the radiant heat from the flame. However, since the outer peripheral side surface 12b of the burner head 12 of this embodiment is subjected to a highly insulating surface treatment such as a microporous ceramic coating, the temperature rise of the burner head 12 due to the radiant heat from the flame can be suppressed.

[0026] Of course, even if the outer peripheral side surface 12b of the burner head 12 is subjected to a highly heat-insulating surface treatment, it is not possible to completely suppress the temperature rise of the burner head 12. However, in this embodiment, the upper surface 12a of the burner head 12 is subjected to a highly heat-radiating surface treatment, such as an alumina-titania ceramic coating. Therefore, when the temperature of the burner head 12 rises, heat rays (infrared rays, far infrared rays, etc.) are emitted from the upper surface 12a of the burner head 12. The thick wavy arrows shown in the figure represent the radiation of heat rays from the upper surface 12a of the burner head 12. The amount of radiation of heat rays increases as the temperature increases. Therefore, it is possible to effectively prevent the temperature of the upper surface 12a of the burner head 12 from becoming too high.

[0027] In this way, in the stove burner 10 of this embodiment, the outer peripheral side surface 12b of the burner head 12 is prevented from being heated by the radiant heat of the flame, and at the same time, heat rays are easily radiated from the upper surface 12a of the burner head 12, making it difficult for the temperature of the upper surface 12a to become high. Therefore, even if viscous spilled liquid or the like falls on the upper surface 12a of the burner head 12, the spilled liquid or the like will not burn or solidify in a short time, and the slope of the upper surface 12a makes it possible for the spilled liquid or the like to be discharged to the outside of the burner head 12 before it burns or solidifies.

[0028] Furthermore, from the viewpoint of preventing scorching or sticking of spilled juices and the like, it is desirable that the outer peripheral side surface 12b, which is exposed to the radiant heat of the flame, has high thermal insulation properties, but it does not need to have high thermal radiation properties. Also, it is desirable that the upper surface 12a of the burner head 12, which is exposed to spilled juices and the like, has high thermal radiation properties, but it does not need to have high thermal insulation properties. Therefore, by performing a surface treatment that emphasizes thermal insulation on the outer peripheral side surface 12b of the burner head 12 and a surface treatment that emphasizes thermal radiation on the upper surface 12a, it is possible to reliably prevent scorching or sticking of spilled juices and the like.

[0029] Furthermore, in the stove burner 10 of this embodiment, when fuel gas is burned, heat rays are emitted upward from the upper surface 12a of the burner head 12, heating the bottom of the cooking vessel placed on the trivet 4 (see FIG. 1). This also makes it possible to improve the thermal efficiency of the stove burner 10.

[0030] In the stove burner 10 of the present embodiment described above, the outer peripheral side surface 12b of the burner head 12 is treated with a highly insulating surface, and the top surface 12a of the burner head 12 is treated with a highly heat-radiating surface. However, the surface treatment applied to the top surface 12a of the burner head 12 may be changed to a highly water-repellent surface treatment. Even with this modified stove burner 10, it is possible to prevent scorching and adhesion of spilled liquids.

[0031] 4 is an explanatory diagram showing why the modified stove burner 10 can prevent scorching and adhesion of spilled liquid and the like. As shown by the dashed lines in FIG. 4, even in the modified stove burner 10, a flame is formed outside the main flame port 15a and auxiliary flame port 15b. Therefore, as shown by the thick straight arrows in the figure, the outer peripheral side surface 12b of the burner head 12 receives radiant heat from the flame. However, because the outer peripheral side surface 12b of the modified burner head 12 is also subjected to a highly insulating surface treatment such as a microporous ceramic coating, it is possible to suppress a rise in temperature of the burner head 12 and the upper surface 12a of the burner head 12.

[0032] In the stove burner 10 of the modified example, the upper surface 12a of the burner head 12 is subjected to a highly water-repellent surface treatment such as a fluorine coating. In addition, the upper surface 12a of the burner head 12 is inclined so that the outer side is lower. Therefore, even if viscous liquid such as simmered soup gets on the upper surface 12a of the burner head 12, it can be drained to the outside of the burner head 12 before it burns or sticks. As a result, it is possible to prevent the liquid from burning or sticking to the upper surface 12a of the burner head 12.

[0033] Furthermore, from the viewpoint of preventing scorching or sticking of spilled juices and the like, it is desirable that the outer peripheral side surface 12b, which is exposed to the radiant heat of the flame, has high thermal insulation properties, but it does not need to have high water repellency. Also, it is desirable that the upper surface 12a of the burner head 12, which is exposed to spilled juices and the like, has high water repellency, but it does not need to have high thermal insulation properties. Therefore, by performing a surface treatment that emphasizes thermal insulation on the outer peripheral side surface 12b of the burner head 12 and a surface treatment that emphasizes water repellency on the upper surface 12a, it is possible to reliably prevent scorching or sticking of spilled juices and the like.

[0034] The above describes the stove burner 10 of this embodiment and modified examples, but the present invention is not limited to the above embodiments and modified examples, and can be implemented in various forms within the scope of its gist.

[0035] For example, in the above-described embodiment and modified examples, the surface treatment is described as a treatment for forming a film (so-called coating), but a treatment for performing mechanical processing may also be used. For example, in the modified example described above, a fluorine coating is applied to the upper surface 12a of the burner head 12 to impart high water repellency, but water repellency due to the lotus effect may also be imparted by applying lotus processing.

[0036] Furthermore, the gas stove 1 of the present embodiment and the modified example described above has been described as having the temperature sensor 5 mounted so as to protrude from the insertion hole 13 formed in the center of the burner head 12. However, it is not always necessary to mount the temperature sensor 5, and in that case, the upper part of the insertion hole 13 in the center of the burner head 12 may be closed. [Explanation of symbols]

[0037] 1...Gas stove, 2...Stove body, 3...Top plate, 3a...Burner ring, 4...trivet, 5...temperature sensor, 6...spark plug, 7...grill door, 8...Stove operation button, 9...Grill operation button, 10...Stove burner, 11... burner body, 12... burner head, 12a... upper surface, 12b... outer peripheral side surface, 12c... eaves portion, 13... insertion hole, 15a... main flame port, 15b…Auxiliary flame mouth.

Claims

1. A stove burner in which a ring-shaped or circular burner head having a plurality of flame ports on its outer peripheral side is placed on a burner body, and fuel gas supplied to the burner body is ejected from the flame ports of the burner head, thereby burning the fuel gas outside the flame ports. The upper surface of the burner head is subjected to a surface treatment that has better thermal radiation properties than the outer peripheral side surface, The outer peripheral side surface of the burner head is subjected to a surface treatment that provides better heat insulation than the upper surface. A stove burner characterized by:

2. A stove burner in which a ring-shaped or circular burner head having a plurality of flame ports on its outer peripheral side is placed on a burner body, and fuel gas supplied to the burner body is ejected from the flame ports of the burner head, thereby burning the fuel gas outside the flame ports. The upper surface of the burner head is subjected to a surface treatment that is more water-repellent than the outer peripheral side surface, The outer peripheral side surface of the burner head is subjected to a surface treatment that provides better heat insulation than the upper surface. A stove burner characterized by:

3. The stove burner according to claim 1 or 2, The upper surface of the burner head is inclined downward from the center toward the outside in the radial direction. A stove burner characterized by:

4. A gas heating cooker equipped with the stove burner according to any one of claims 1 to 3.

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