JP3756347B2 - Gas stove - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an improvement in the heating efficiency of a gas stove in which a stove burner having an outer peripheral flame hole array is installed in a burner hole opened in a top plate.
[0002]
[Prior art]
The stove burner used for the gas stove has an annular flame hole array on the outer periphery of the burner head, and heats an object to be heated such as a pan placed on the virtues and arranged upward. The flame formed by the outer peripheral flame hole array expands radially, and the flame overflows from the bottom of the pan due to a change in use capacity (flame size) or pan size. In this case, the inclination angle of each flame hole constituting the outer circumferential flame hole row is conventionally set to be directed upward by about 30 degrees with respect to the horizontal, but it is ensured that the flame overflows from the pan bottom. It is difficult to prevent.
[0003]
[Problems to be solved by the invention]
As a result, the flame of the stove burner overflows from the bottom of the pan and the heating efficiency at the center of the pan bottom is reduced, the handle of the pan is scorched, and the surroundings of the stove burner are heated and heated. . In addition, the vertical position (level) of the outer peripheral flame hole array is designed to prevent the inner peripheral edge of the burner hole from being heated by the flame of the outer peripheral flame hole array. It is set higher than the position of the plate (the inner peripheral edge of the burner hole or the inner peripheral edge of the burner cover or juice tray attached to the burner hole). For this reason, there is a problem that the flame is easily affected by the wind, and the object to be heated cannot be heated uniformly, or the flame is easily blown out.
[0004]
An object of the present invention is to provide a gas stove equipped with a stove burner having a peripheral flame hole array, by setting a large inclination of the flame holes constituting the peripheral flame hole array, and by setting up a flame, The present invention provides a gas stove that can improve the heating efficiency and the heat efficiency of an object to be heated such as a pot having a small diameter.
[0005]
[Means for Solving the Problems]
The present invention constitutes the outer peripheral flame hole row in a gas stove including a housing including a top plate provided with burner holes and a stove burner disposed in the burner hole and having an outer peripheral flame hole row. The inclination angle of each flame hole is set in the range of 45 degrees to 65 degrees, and the position of the upper end of each flame hole is set to the inner peripheral edge of the burner hole or the inner peripheral edge of the burner cover attached to the burner hole, and the ceiling. It is characterized in that it is arranged at a lower position than the part located at the outer peripheral part of these inner peripheral edges of the plate . In the present invention, the inclination angle of the flame hole is the angle of the center line of the flame hole and the elevation angle of the exit of the flame hole.
[0006]
【The invention's effect】
In the present invention, the inclination angle of each flame hole constituting the outer circumferential flame hole row is set in the range of 45 to 65 degrees, and the position of the upper end of each flame hole is arranged lower than the top plate. There is an effect.
1) Since the flame formed on the outer periphery of the outer peripheral flame hole row is directed upward, the heating efficiency at the center of the pan bottom can be improved, and the heating efficiency of an object to be heated such as a pan having a small diameter can be improved.
2) Since the outer peripheral flame hole array is located below the top plate, the flame is hardly affected by the wind, and the heated object is not easily heated or blown out.
[0007]
In the gas stove according to claim 2, secondary air is supplied to the flame formed on the outer periphery of the outer peripheral flame hole array from the outer peripheral side of the flame below the top plate, and the inner peripheral edge of the burner hole And the upper flame is deflected upward and blown upward in an annular flame forming space between the outer periphery of the stove burner. By this structure, the effect | action which a flame spreads radially can be suppressed more largely, and the effect which concentrates a flame on the center part of a pan bottom can be increased.
[0008]
In the gas stove according to claim 3, the flame forming space is formed between the inner peripheral edge of the annular plate-like burner cover placed in the burner hole and the outer periphery of the burner head of the stove burner. The secondary air is supplied to the outer periphery of the flame from between the soup pan and the burner cover that are installed below the burner cover and closes the lower part of the flame forming space.
[0009]
With this configuration, the inflow of the secondary air from below can be reliably blocked, and the secondary air can be supplied to the flame only from the outer periphery, so that the upward deflection of the flame can be performed smoothly. Moreover, since the burner cover is easily cooled with the secondary air, there is little scorching of the boiled juice and cleaning is easy.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 shows a gas stove 1 according to an embodiment of the present invention, and the gas stove 1 includes a housing H in which a circular burner hole 12 is opened at a predetermined position of a top plate 11. Inside the burner hole 12, a stove burner 2 having an annular outer peripheral flame hole array 20 is installed. The top plate 11 around the burner hole 12 is set somewhat lower than the surface of the outer peripheral top plate 11 and is a stepped recess 14 for holding the virtues 13.
[0011]
The inner peripheral portion of the recess 14 (the edge of the burner hole 12) is a bulging edge 15 that is bent obliquely upward. In this embodiment, the burner cover 3 operatively constituting a part of the top plate 11 is detachably attached to the burner hole 12 while being locked to the bulging edge 15. As will be described below, the outer peripheral flame hole row 20 is lower than the concave portion 14 of the top plate 11 or lower than the top plate 11 (including the burner cover 3) located inside the concave portion 14. Is set.
[0012]
As shown in FIGS. 1 and 3, the burner cover 3 is made of a substantially annular sheet metal, is formed by bending the outer edge portion downward, and is placed outside the bulging edge 15 of the burner hole 12. It consists of a peripheral edge 31, an annular plate-shaped intermediate portion 32 having a gentle conical surface with an apex angle of about 80 degrees, and an inner peripheral edge 33 inclined downward at an inclination angle of about 60 degrees. In this embodiment, the inner peripheral edge 33 of the burner cover 3 acts as the inner peripheral edge of the burner hole 12.
[0013]
The stove burner 2 includes a burner body 4 and a burner head 5 placed on the burner body 4. The burner body 4 is made of sheet metal in this embodiment, and a premixing tube 22 having one end (outer end) serving as a supply port 21 for fuel gas and combustion primary air, and the other end of the premixing tube 22. It has an annular head 41 provided connected to (inner end). The inside of the head 41 is an annular air-fuel mixture chamber 23 that is connected to the other end of the premixing tube 22 and is open upward.
[0014]
The air-fuel mixture chamber 23 has a vertical cylindrical inner wall 42, a substantially cylindrical outer wall 44 in which a connection inner peripheral edge 43 of a sheet metal projects from the inner periphery of the intermediate portion, and a bottom wall 45. The center of the outer side wall 44 is eccentric to the right in the figure from the center of the inner side wall 42, and the air-fuel mixture chamber 23 is set to have a wide width on the right side in the figure connected to the premixing tube 22 and a narrow width on the left side in the figure. The gap 24 between the connection inner peripheral edge 43 and the inner wall 42 is also set to have a wide width on the right side in the drawing and a narrow width on the left side in the drawing to secure a mounting space for an ignition electrode (not shown).
[0015]
As shown in FIG. 1 and FIG. 2A, an outer bank 46 having a substantially reverse V cross section extends from the upper end of the outer wall 44 in an annular shape. The outer bank 46 extends obliquely upward from the upper end of the outer wall 44 at an inclination angle α = 50 degrees, has an inverted conical surface 47 concentric with the inner wall 42, and an inclination angle β = 30 from the upper end of the inverted conical surface 47. It comprises a conical surface 48 extending obliquely downward at a degree, and a cylindrical skirt portion 49 extending downward from the lower end of the conical surface 48. In the present invention, the inclination angle α is desirably 45 degrees ≦ α ≦ 65 degrees, and is optimally within a range of α = 50 degrees ± 1 degree.
[0016]
The burner head 5 is forged in this embodiment, and is formed in a bowl shape on the outer periphery of a hollow cylindrical part 51 and an intermediate part of the hollow cylindrical part 51, and a flange part 52 serving as a ceiling of the gas mixture chamber 23. And have. On the outer peripheral portion of the lower surface of the flange portion 52, an outer cylindrical wall 54 having a plurality of inclined slit-like flame holes 53 formed in a skewer shape on the lower end surface which is an inverted conical surface is provided. That is, each slit formed in the outer cylindrical wall 54 forms the flame hole 53 by placing the lower end surface which is an inverted conical surface on the inverted conical surface 47. The hollow cylindrical part 51 is an inner cylinder part 55 whose lower end part is inserted into the upper part of the inner side wall 42, and the upper end part is a protective cylinder 56 of the pot bottom temperature sensor S installed at the center of the hollow cylindrical part 51. ing.
[0017]
As shown in FIGS. 2A and 2B, the flame hole 53 is formed of two types of tapered slits 5A and 5B having a base width of about 2 mm and a depth of about 1 mm and about 4 mm. . The slits 5A and 5B are alternately arranged in a predetermined pattern of 1: 1 to 1: 1, and each of the slits 5A and 5B has a rectangular cross section with the inverted conical surface 47 as the bottom, and the center line is linear. Thus, a flame hole 53 having a constant cross-sectional area from the inlet to the outlet is formed. The flame hole group 53 constitutes an outer peripheral flame hole row 20 in an annular shape on the outer periphery of the stove burner 2.
[0018]
The inclination angle γ of the ceilings of all the slits 5A and 5B is set to be the same as the inclination angle α of the inverted conical surface 47. That is, in the present invention, the inclination angle γ is desirably 45 degrees ≦ γ ≦ 65 degrees, and optimally within a range of γ = 50 degrees ± 1 degree. In this embodiment, the inclination angle of the center line C of each flame hole 53 (the elevation angle θ of each flame hole 53) is 50 degrees. In this invention, the elevation angle θ of the center line C is 45 degrees or more and 65 degrees. Set as follows. Desirably, the elevation angle θ of the center line C is not less than 45 degrees and not more than 55 degrees, and the range of 50 degrees ± 1 degree is optimal.
[0019]
In addition, in the case of the stove burner 2 provided with the pan bottom temperature sensor S from the result of the experiment, the elevation angle θ of the center line C is 45 degrees or more and 55 degrees or less from the viewpoint of preventing the pan bottom temperature sensor S from being exposed to the flame. It turns out that it is better. Similarly, in the case of the stove burner 2 not provided with the pan bottom temperature sensor S, the elevation angle θ of the center line C can be set to 45 degrees or more and 65 degrees or less.
[0020]
The positions of the upper ends of the outlets of all the flame holes 53 constituting the annular outer circumferential flame hole array 20 (indicated by the alternate long and short dash line L) are set lower than the position of the lower surface of the concave portion 14 of the top plate 11. The position of the top plate 11 inside the recess 14 in the vertical direction is higher than the recess 14 including the burner cover 3 that effectively forms a part of the top plate.
[0021]
In this embodiment, the position of the ceiling at the outer end of the slit 5 </ b> B having a depth of about 4 mm is set to be substantially the same as the position of the upper surface of the outer peripheral end of the flange 52, and the lower surface of the recess 14 of the top plate 11. It is lower than the position of about 2.5 mm. The inner peripheral edge 33 of the burner cover 3 is set approximately 8 mm higher than the upper surface of the flange portion 52 of the burner head 5, and an annular flame forming space 30 is formed between the outer periphery of the burner head 5 and the flame F blows up. .
[0022]
An annular juice tray 6 is attached to the lower side of the burner cover 3. The soup pan 6 has an inner cylindrical edge 61 close to the skirt portion 49, a bottom plate 62, and an inclined surface portion 64 in which a secondary air hole 63 is opened. The secondary air holes 63 are formed in substantially the entire circumference at the same level as the outer peripheral flame hole array 20, and the secondary air is supplied to the flame F from the side higher than the middle part of the flame F as shown in the figure. ing.
[0023]
As a result, the flame F is biased so as to be deflected upward by the secondary air flow. The reason why the inclination angle α or γ is set to 45 degrees ≦ α, θ, γ ≦ 65 degrees is that if the angle is less than 45 degrees, the flame F spreads radially and the flame F burns the burner cover 3. Yes, if it is greater than 65 degrees, the flame F stands too much, and the pan bottom temperature sensor S is exposed to the flame F, which makes it impossible to accurately detect the temperature. In this embodiment, the upper end edge of the inclined surface portion 64 abuts and is fixed to the lower surface of the intermediate portion 32 of the burner cover 3 so that the juice receiving tray 6 and the burner cover 3 are integrated. Thereby, there exists an advantage which can be attached or detached by one touch.
[0024]
In this gas stove, as shown in FIG. 4, an air-fuel mixture of fuel gas and primary combustion air is blown obliquely upward at an inclination angle of 50 degrees from each flame hole 53 and ignited by an ignition device (not shown). F is formed in an annular shape. The flame F is directed substantially vertically upward in the middle (level of the inner peripheral edge 33 of the burner cover) by the draft action and the deflection action by the secondary air flow A, and the flame formation space 30 blows upward, Heat the bottom of the pan placed on.
[0025]
As a result, a gas stove with a small diameter and good heating efficiency can be obtained, and it is possible to prevent a problem that the flame F overflows from the bottom of the pan and scorches the handle of the pan or the temperature around the pan increases. improves. In the conventional stove burner, as indicated by the broken line in FIG. 4, the secondary air flow A ′ is supplied to the root of the flame F ′ from below, so that the flame F ′ is less deflected upward.
[0026]
Naturally, the present invention can also be applied to a gas stove having a type of stove burner that does not include the pan bottom temperature sensor S. Further, the gap between the inner peripheral edge of the burner hole 12 and the outer periphery of the stove burner 2 may be a flame forming space without providing the burner cover 3.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a gas burner portion of a gas stove.
FIG. 2 is a cross-sectional view and a bottom view of a burner top.
FIG. 3 is a perspective view of a burner cover and a water tray.
FIG. 4 is an enlarged view of a main part of FIG. 1;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Gas stove 11 Top plate 12 Burner hole 2 Stove burner 20 Peripheral flame hole row | line | column 3 Burner cover 30 Flame formation space 4 Burner body 5 Burner head 53 Flame hole 6 Juice tray F Flame H Housing A Secondary air flow

Claims (3)

In a gas stove comprising a housing comprising a top plate provided with a burner hole, and a stove burner disposed in the burner hole and having an outer peripheral flame hole row,
The inclination angle of each flame hole constituting the outer circumferential flame hole row is set in the range of 45 to 65 degrees, and the upper end position of each flame hole is the burner attached to the inner peripheral edge of the burner hole or the burner hole A gas stove, characterized in that the gas stove is disposed below the inner peripheral edge of the cover and the portion of the top plate located on the outer peripheral part of the inner peripheral edge .   2. The gas stove according to claim 1, wherein the flame formed by the outer peripheral flame hole row is supplied with secondary air from the outer peripheral side of the flame below the top plate, and the inner peripheral edge of the burner hole A gas stove that blows upward from an annular flame forming space between the outer circumference of the stove burner.   3. The gas stove according to claim 2, wherein the flame forming space is between an inner peripheral edge of an annular plate-like burner cover placed in the burner hole and an outer periphery of a burner head of the stove burner. The secondary air is formed and supplied to the outer periphery of the intermediate portion of the flame from between the soup saucer that is installed below the burner cover and closes the lower part of the flame forming space and the burner cover. Gas stove.

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