JP7787732B2 - Stove burners and gas-heated cookers equipped with stove burners - Google Patents

Description

The present invention relates to a stove burner in which multiple flame ports are opened on the outer peripheral side of a burner head mounted on a burner body, and a gas heating cooker equipped with the stove burner.

In a gas cooking appliance 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 circular 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.

In addition, in recent years, stove burners have tended to have higher heat output, which causes the burner head to become very hot during cooking, making it more likely that spilled liquid will burn on the top surface of the burner head or that the moisture will evaporate and cause the burner head to stick. When the burner head gets burned or stuck, it requires a lot of effort to clean.

In response, 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 other liquid spills onto the top surface of the burner head, the spills are quickly drained to the outside of the burner head, preventing burning or sticking (Patent Document 1).

Japanese Patent Application Laid-Open No. 2020-153538

However, the stove burners proposed above have the problem of not being able to adequately prevent burning and sticking. The reason for this is that, due to restrictions primarily related to the design of the stove burner, the angle of inclination of the top surface of the burner head cannot be made too large, so when the viscosity of spilled liquid increases, it is not possible to quickly drain the spilled liquid to the outside of the burner head.

This invention was made to solve the above-mentioned problems with conventional technology, and aims to provide a stove burner that can prevent spilled liquid and other substances from burning or adhering to the burner head.

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 is characterized in that the outer peripheral side surface and the upper surface are subjected to different surface treatments.

In the stove burner of the present invention described above, fuel gas supplied to the burner body is burned outside 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 given different surface treatments. From the perspective of preventing spilled liquid and other contaminants 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 giving the outer circumferential side and top surfaces of the burner head different surface treatments, it is possible to apply surface treatments that are appropriate for each surface from the perspective of preventing spilled liquid and other contaminants from burning or adhering to the burner head, making it possible to prevent spilled liquid and other contaminants from burning or adhering to the burner head.

Furthermore, in the stove burner of the present invention described above, the upper surface of the burner head may be shaped to slope downward from the center toward the radially outward direction.

This allows any spills that get on the top surface of the burner head to be quickly drained to the outside of the burner head by their own weight, preventing the spills from burning or sticking.

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 than the outer peripheral side surface, and the outer peripheral side surface of the burner head may be subjected to a surface treatment that provides better insulation than the upper surface.

This prevents the burner head from becoming too hot, even if the flames from the combustion of fuel gas heat up the outer periphery of the burner head. Additionally, 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 other liquid gets on the top surface of the burner head, it can be drained from the top surface of the burner head before it burns or solidifies, preventing burning or solidification.

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 water repellency than the outer peripheral side surface, and the outer peripheral side surface of the burner head may be subjected to a surface treatment that provides better heat insulation than the upper surface.

This prevents the burner head from becoming too hot, even if the flames from the combustion of fuel gas heat up the outer periphery of the burner head. In addition, even if spilled liquid or other liquid gets 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 other liquid from burning or adhering to the top surface of the burner head.

The stove burner of the present invention described above may also be installed in a gas-heated cooker.

With this type of gas cooking appliance, even if cooking liquid spills onto the burner head of the stove burner, it is possible to prevent the liquid from burning or adhering to the burner head.

1 is a perspective view showing the external shape of a gas stove 1 equipped with a stove burner 10 of this embodiment. An explanatory diagram showing the state in which the stove burner 10 of this embodiment protrudes from the top plate 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. 10 is an explanatory diagram showing why the modified stove burner 10 can prevent scorching and sticking of spilled liquid and the like.

Figure 1 is a perspective view showing the exterior shape of a gas stove 1 equipped with a stove burner 10 according to this embodiment. The gas stove 1 according to this embodiment corresponds to the "gas cooking appliance" of the present invention. The gas stove 1 shown in Figure 1 is a built-in type gas stove that is installed by fitting it into an open storage space in the countertop of a system kitchen (not shown). It includes a box-shaped stove body 2 that is housed in the storage space, and a top plate 3 that is installed to cover the open top surface of the stove body 2.

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 a ring-shaped 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, above the burner 10. The top 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 the upper end of the temperature sensor 5 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.

A grill door 7 is provided on the front of the gas stove 1, and a grill compartment (not shown) is installed behind the grill door 7. By pulling the grill door 7 forward, the user of the gas stove 1 can place food in the grill compartment and heat it for cooking. Two stove operation buttons 8 are provided to the right of the grill door 7. By operating the left stove operation button 8, the user can ignite the left stove burner 10 to start combustion, adjust the heat, and end combustion. Similarly, by operating the right stove operation button 8, the user can start combustion, adjust the heat, and 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, which the user can use to start combustion, adjust the heat, and end combustion of the grill.

Figure 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 is configured with a ring-shaped burner head 12 mounted on 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.

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 ports 15a and auxiliary flame ports 15b in this embodiment correspond to the "flame ports" in this invention.

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 different types of surface treatments on the upper surface 12a and the outer circumferential side surface 12b is that, from the perspective of preventing scorching or adhesion of spilled liquid and the like, the upper surface 12a and the outer circumferential side surface 12b require different characteristics. In the stove burner 10 of this embodiment, the upper surface 12a is surface-treated with a high thermal emissivity (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.

Figure 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 auxiliary flame nozzle 15b are indicated by dashed lines. As the flames are formed just outside the main flame nozzle 15a and 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 radiant heat from the flame. However, because the outer peripheral side surface 12b of the burner head 12 of this embodiment is treated with a highly insulating surface treatment such as a microporous ceramic coating, the temperature of the burner head 12 can be prevented from rising due to radiant heat from the flame.

Of course, even if the outer peripheral side surface 12b of the burner head 12 is subjected to a highly insulating surface treatment, it is not possible to completely prevent the temperature of the burner head 12 from rising. However, in this embodiment, the top 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 top surface 12a of the burner head 12. The thick wavy arrows in the figure represent the radiation of heat rays from the top surface 12a of the burner head 12. The amount of radiation of heat rays increases as the temperature increases. This effectively prevents the temperature of the top surface 12a of the burner head 12 from becoming too high.

In this way, with the stove burner 10 of this embodiment, the outer peripheral side surface 12b of the burner head 12 is prevented from being heated by radiant heat from the flame, and at the same time, heat rays are more easily emitted from the top surface 12a of the burner head 12, making it less likely for the temperature of the top surface 12a to become too high. Therefore, even if viscous spilled liquid or other liquid falls on the top surface 12a of the burner head 12, the spilled liquid will not burn or solidify in a short time, and the slope of the top surface 12a makes it possible for the spilled liquid to be expelled to the outside of the burner head 12 before it burns or solidifies.

Furthermore, from the perspective of preventing spilled sauce and other contaminants from burning or sticking, it is desirable for the outer peripheral side surface 12b, which is exposed to the radiant heat of the flame, to have high thermal insulation properties, but it does not need to have high thermal radiation properties. Furthermore, it is desirable for the top surface 12a of the burner head 12, which is exposed to spilled sauce and other contaminants, to have high thermal radiation properties, but it does not need to have high thermal insulation properties. Therefore, by applying a surface treatment that emphasizes insulation to the outer peripheral side surface 12b of the burner head 12 and a surface treatment that emphasizes thermal radiation to the top surface 12a, it is possible to reliably prevent spilled sauce and other contaminants from burning or sticking.

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 a cooking vessel placed on the trivet 4 (see Figure 1). This also makes it possible to improve the thermal efficiency of the stove burner 10.

In the stove burner 10 of the above-described embodiment, the outer peripheral side surface 12b of the burner head 12 is treated with a highly insulating surface treatment, and the top surface 12a of the burner head 12 is treated with a highly heat-radiating surface treatment. 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. This modified stove burner 10 can also prevent spilled liquid from burning or sticking.

Figure 4 is an explanatory diagram showing why the modified stove burner 10 is able to prevent scorching and sticking of spilled liquid and other contaminants. As shown by the dashed lines in Figure 4, even in the modified stove burner 10, flames are formed outside the main flame nozzle 15a and auxiliary flame nozzle 15b, so the outer peripheral side surface 12b of the burner head 12 is subjected to radiant heat from the flame, as indicated by the thick straight arrow in the figure. However, because the outer peripheral side surface 12b of the modified burner head 12 is also treated with a highly insulating surface treatment such as a microporous ceramic coating, it is possible to prevent the temperature of the burner head 12 and the top surface 12a of the burner head 12 from rising.

In the modified stove burner 10, the upper surface 12a of the burner head 12 is treated with 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 surface is lower. Therefore, even if viscous spilled liquid or the like 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 spilled liquid or the like from burning or sticking to the upper surface 12a of the burner head 12.

Furthermore, from the perspective of preventing spilled juices and the like from burning or sticking, it is desirable for the outer peripheral side surface 12b, which is exposed to the radiant heat of the flame, to have high thermal insulation properties, but it does not need to have high water repellency. Furthermore, it is desirable for the top surface 12a of the burner head 12, which is exposed to spilled juices and the like, to have high water repellency, but it does not need to have high thermal insulation properties. Therefore, by applying a surface treatment that emphasizes thermal insulation to the outer peripheral side surface 12b of the burner head 12 and a surface treatment that emphasizes water repellency to the top surface 12a, it is possible to reliably prevent spilled juices and the like from burning or sticking.

The stove burner 10 of this embodiment and its modified examples has been described above, but the present invention is not limited to the above-mentioned embodiment and modified examples, and can be implemented in various forms without departing from the spirit of the present invention.

For example, in the above-described embodiment and modified examples, the surface treatment was described as a process for forming a film (so-called coating), but it may also be a process for performing mechanical processing. For example, in the modified example described above, a fluorine coating was 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.

Furthermore, the gas stove 1 of the above-mentioned embodiment and modified example has been described as having a temperature sensor 5 mounted protruding from an insertion hole 13 formed in the center of the burner head 12. However, it is not necessary to mount a 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.

1...gas stove, 2...stove body, 3...top plate, 3a...burner ring,
4...trivet, 5...temperature sensor, 6...ignition 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 (4)

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,
A stove burner characterized in that 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 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,
A stove burner characterized in that the outer peripheral side surface of the burner head is subjected to a surface treatment that provides better heat insulation than the upper surface. The stove burner according to claim 1 or 2,
A stove burner characterized in that the upper surface of the burner head is shaped to be inclined in a direction that becomes lower from the center toward the outside in the radial direction. A gas heating cooker equipped with the stove burner described in any one of claims 1 to 3.