JP2000346365A - Gas cooking stove - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a gas cooking stove that can improve the heating efficiency of an object to be heated such as a pan with a small diameter by setting the incline of a flame hole for composing an outer-periphery burner port row larger for erecting flame in the gas cooking stove with a cooking stove burner with the outer-periphery burner port row. SOLUTION: In a gas cooking stove equipped with a housing H that has a top 11 with a burner hole 12, and a cooking stove burner 2 that is arranged in the burner hole 12 and at the same time has an outer-periphery burner port row 20, the elevation of each burner port 53 for composing the outer-periphery burner port row 20 is set to 45 to 60 degrees, and at the same time the position of the upper end of each flame hole 53 is arranged at a part being lower than the top 11. In flame F formed by the outer-periphery burner port row 20, secondary air is supplied to the middle part of the flame F from the lower outer- periphery side of the top 11 for allowing the flame F to deviate to an upper part.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field 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]

2. Description of the Related Art A stove burner used for a gas stove has an outer peripheral flame hole array in an annular shape on the outer periphery of a burner head.
The object to be heated, such as a pot placed above and placed on Gotoku, is heated. The flame formed by the outer peripheral flame hole row spreads radially greatly, and the flame overflows from the bottom of the pan due to a change in the use capacity (size of the flame) or the size of the pan. In this case, the angle of inclination of each of the flame holes constituting the outer peripheral flame hole row is conventionally set to be about 30 degrees upward with respect to the horizontal, but it is ensured that the flame overflows from the pot bottom to the outside. It is difficult to prevent.

[0003]

As a result, the flame of the stove burner overflows from the bottom of the pot to lower the heating efficiency at the center of the bottom of the pot, burns the handle of the pot, or causes the flame around the stove burner. Causes heating and temperature rise. Also,
The vertical position (level) of the outer peripheral flame hole row is set at the position of the top plate near the outer periphery of the outer peripheral flame hole row in order to prevent the inner peripheral edge of the burner hole from being heated by the flame of the outer peripheral flame hole row. It is set higher than the position (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 evenly, or the flame easily blows out.

SUMMARY OF THE INVENTION An object of the present invention is to provide a gas stove provided with a stove burner having an outer peripheral flame hole array, by setting a large inclination of the flame holes constituting the outer peripheral flame hole array to make a flame stand. The heating efficiency of the heated object can be improved,
It is an object of the present invention to provide a gas stove capable of improving the thermal efficiency of an object to be heated such as a small-diameter pan.

[0005]

SUMMARY OF THE INVENTION The present invention relates to a gas stove having a housing provided with a top plate provided with a burner hole, and a stove burner arranged in the burner hole and having an outer peripheral flame hole array. The angle of inclination of each of the flame holes constituting the outer peripheral flame hole row is set in a range of 45 degrees to 65 degrees, and the upper end of each flame hole is attached to the inner peripheral edge of the burner hole or the burner hole. (A portion located on the inner peripheral edge of the burner cover and the outer peripheral portion of the inner peripheral edge of the top plate). In the present invention, the inclination angle of the flame hole refers to the angle of the center line of the flame hole and the elevation angle of the exit of the flame hole.

[0006]

According to the present invention, the inclination angle of each of the flame holes constituting the outer peripheral flame hole row is set in the range of 45 ° to 65 °, and the upper end of each flame hole is disposed below the top plate. Therefore, the following effects are obtained. 1) Since the flame formed on the outer periphery of the outer peripheral flame hole row is directed upward, the heating efficiency of the central portion of the bottom of the pot can be improved, and the heating efficiency of the object to be heated such as a small-diameter pan can be improved. 2) Since the outer peripheral flame hole row is located below the top plate, the flame is hardly affected by the wind, and the heated object is less likely to be partially heated or blown out.

In the gas stove according to the second aspect, the flame formed on the outer periphery of 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 burner hole is formed. And is deflected upward in a ring-shaped flame forming space between the inner peripheral edge and the outer periphery of the stove burner. With this configuration, the effect of the flame spreading radially can be further suppressed, and the effect of concentrating the flame on the center of the pot bottom can be increased.

In the gas stove according to the third aspect, the flame forming space is defined by an inner peripheral edge of an annular plate-shaped burner cover placed in the burner hole and an outer peripheral of a burner head of the stove burner. The secondary air is formed between the juice tray and the burner cover, which is installed below the burner cover and closes the lower part of the flame forming space, and is supplied to the outer periphery of the flame. I do.

With this configuration, the inflow of secondary air from below can be reliably shut off, and the secondary air can be supplied to the flame only from the outer periphery, so that the flame can be smoothly deflected upward. Further, since the burner cover is easily cooled by the secondary air, the boiled juice is less likely to be scorched and is easier to clean.

[0010]

FIG. 1 shows a gas stove 1 according to an embodiment of the present invention. The gas stove 1 has a housing H having a circular burner hole 12 at a predetermined position of a top plate 11.
Is provided. In the inside of the burner hole 12, a stove burner 2 having an annular outer peripheral flame hole row 20 is installed. The top plate 11 around the burner hole 12 is set to be slightly lower than the surface of the top plate 11 on the outer periphery thereof, and serves as a stepped concave portion 14 for holding the go 13.

Inner circumference of recess 14 (edge of burner hole 12)
Are bulging edges 15 bent obliquely upward. In this embodiment, the burner cover 3, which is a part of the top plate 11, is provided in the burner hole 12 with the bulging edge 15.
And is detachably attached. The outer peripheral flame hole row 20 is lower than the concave portion 14 of the top plate 11 or the top plate 1 located inside the concave portion 14 as described below.
1 (including the burner cover 3).

As shown in FIGS. 1 and 3, the burner cover 3 is made of a substantially annular sheet metal, is formed by bending an outer edge thereof downward, and is placed so as to cover the bulging edge 15 of the burner hole 12. An outer peripheral edge 31, a circular 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 is
2 as the inner peripheral edge.

The burner burner 2 includes a burner body 4 and a burner head 5 mounted on the burner body 4. The burner body 4 is made of sheet metal in this embodiment,
A premix pipe 22 having one end (outer end) serving as a supply port 21 for fuel gas and primary air for combustion;
Ring-shaped head 4 connected to the other end (inner end) of
One. The inside of the head 41 is an annular mixture chamber 23 which is connected to the other end of the premixing tube 22 and has an open upper part.

The mixture chamber 23 has a vertical cylindrical inner wall 42.
And a substantially cylindrical outer wall 44 having a sheet metal connection inner peripheral edge 43 protruding from the inner periphery of the intermediate portion, and a bottom wall 45. The center of the outer wall 44 is eccentric from the center of the inner wall 42 in the right direction in the drawing, and the mixture chamber 23 is set to have a wide width on the right side in the drawing and a narrow width on the left side in the drawing connected to the premixing pipe 22.
The gap 24 between the connection inner peripheral edge 43 and the inner wall 42 is also set to have a large width on the right side in the figure and a small width on the left side in the figure, thereby securing a space for mounting an ignition electrode (not shown).

As shown in FIGS. 1 and 2A, an outer levee 46 having a substantially inverted V in cross section extends from the upper end of the outer wall 44 in an annular shape. The outer levee 46 extends obliquely upward from the upper end of the outer wall 44 at an inclination angle α = 50 degrees, and has an inverted conical surface 47 concentric with the inner wall 42, and an inclined angle β = 30 from the upper end of the inverted conical surface 47. A conical surface 48 extends obliquely downward at an angle, and a cylindrical skirt portion 49 extends downward from the lower end of the conical surface 48. In the present invention, the inclination angle α is
It is desirable that 45 degrees ≦ α ≦ 65 degrees, and it is most preferable that α be within the range of α = 50 degrees ± 1 degree.

The burner head 5 is forged in this embodiment and is formed in a flange shape on the outer periphery of a hollow cylindrical portion 51 and an intermediate portion of the hollow cylindrical portion 51, and serves as a ceiling of the mixture chamber 23. And a flange 52. An outer cylindrical wall 54 in which a large number of inclined slit-shaped flame holes 53 are formed in a skewer shape on the lower end surface which is an inverted conical surface is provided on the outer peripheral portion of the lower surface of the flange portion 52. That is, each slit formed in the outer cylindrical wall 54 has the lower end surface, which is an inverted conical surface, mounted on the inverted conical surface 47 to form the flame hole 53. The hollow cylindrical portion 51 has an inner cylindrical portion 55 whose lower end is inserted into an upper portion of the inner wall 42, and an upper end thereof serves as a protective tube 56 of a pot bottom temperature sensor S installed at the center of the hollow cylindrical portion 51. ing.

As shown in FIGS. 2A and 2B, the flame hole 53 is formed by 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. Have been. The slits 5A and 5B are alternately arranged in a predetermined pattern of 1: 1 to 3: 1.
A and 5B each have a rectangular cross section having the inverted conical surface 47 as the bottom, and form a flame hole 53 having a straight center line and a constant cross-sectional area from the inlet to the outlet. This group of flame holes 53 constitutes an outer peripheral flame hole row 20 in an annular shape on the outer periphery of the stove burner 2.

The inclination angle γ of the ceiling 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 45
Degree ≦ γ ≦ 65 degrees, and γ = 50 degrees ± 1
Optimally within the range of degrees. 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 the present invention, the elevation angle θ of the center line C is 45 degrees or more and 65 degrees. Set as follows. Preferably, the elevation angle θ of the center line C is 45 degrees or more and 55 degrees or less, and
The range of the degree of ± 1 degree is optimal.

From the experimental results, in the case of the stove burner 2 provided with the pan bottom temperature sensor S, the elevation angle θ of the center line C from the viewpoint of preventing the pan bottom temperature sensor S from being exposed to a flame.
It has been found that it is better to set the angle between 45 degrees and 55 degrees or less. Similarly, in the case of the stove burner 2 without the pan bottom temperature sensor S, the elevation angle θ of the center line C is 45 degrees or more and 65 degrees or more.
It can be set to less than degrees.

The positions of the upper ends of the outlets of all the flame holes 53 constituting the annular peripheral flame hole row 20 (indicated by a dashed line L) are as follows.
It is set lower than the position of the lower surface of the concave portion 14 of the top plate 11. The vertical position of the top plate 11 inside the concave portion 14 is higher than the concave portion 14 including the burner cover 3 operatively constituting a part of the top plate.

In this embodiment, the position of the ceiling at the outer end of the slit 5B 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 14 is lower than the position of the lower surface by 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 52 of the burner head 5, and forms an annular flame forming space 30 in which the flame F blows up with the outer periphery of the burner head 5. .

An annular juice receiving tray 6 is attached to the lower side of the burner cover 3. The juice receiving tray 6 has an inner cylindrical edge 61 adjacent to the skirt portion 49, a bottom plate 62, and an inclined surface portion 64 having a secondary air hole 63 formed therein. The secondary air holes 63 are formed on substantially the entire circumference at the same level as the outer peripheral flame hole row 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.

As a result, the flame F is urged upward by the secondary air flow. Note that the inclination angle α or γ
Are set to 45 degrees ≦ α, θ, γ ≦ 65 degrees because
If the temperature is smaller than 5 degrees, the flame F spreads radially, and the flame F burns the burner cover 3. If the temperature is larger than 65 degrees, the flame F rises too much and the pan bottom temperature sensor S
Is exposed to the flame F, so that accurate temperature detection becomes impossible. In this embodiment, the upper end edge of the inclined surface portion 64 contacts and is fixed to the lower surface of the intermediate portion 32 of the burner cover 3, and the juice receiving tray 6 and the burner cover 3 are integrated. Thereby, there is an advantage that attachment and detachment can be performed with one touch.

As shown in FIG. 4, the gas stove mixes a mixture of fuel gas and primary air for combustion with each of the flame holes 53 through 5.
The flame F is blown obliquely upward at an inclination angle of 0 degree and ignited by an ignition device (not shown) to form a flame F in an annular shape. Flame F
Is directed substantially vertically upward in the middle (at the level of the inner peripheral edge 33 of the burner cover) by the drafting action and the deflecting action by the secondary air flow A, and the flame forming space 30 blows upward and is mounted on the Heat the bottom of the placed pot.

This makes it possible to obtain a gas stove having a small diameter and a high heating efficiency, and to prevent a problem that the flame F overflows from the bottom of the pan and burns the handle of the pan or that the temperature around the pan rises. Safety is improved. In the conventional burner burner, as shown by the broken line in FIG. 4, since the secondary air flow A 'is supplied to the base of the flame F' from below, the flame F 'is less deflected upward.

The present invention can naturally be applied to a gas stove having a stove burner of a type not provided with the pan bottom temperature sensor S. Further, without providing the burner cover 3, 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.

[Brief description of the drawings]

FIG. 1 is a sectional view of a burner portion of a gas burner.

FIG. 2 is a sectional view and a bottom view of a burner top.

FIG. 3 is a perspective view of a burner cover and a water receiving 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 Outer flame hole row 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)

[Claims] 1. A gas stove comprising a housing provided with a top plate provided with burner holes, and a stove burner arranged in said burner holes and having an outer circumferential flame hole array, wherein said outer peripheral flame hole array is constituted. 45 ° to 6 °
A gas stove having a range of 5 degrees and an upper end of each flame hole disposed below the top plate. 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 is formed in an annular shape between an inner peripheral edge of the burner hole and an outer periphery of the stove burner. Gas stove characterized by being blown upward from a flame formation space. 3. The gas stove according to claim 2,
The flame forming space is formed between an inner peripheral edge of an annular disc-shaped burner cover placed in the burner hole and an outer periphery of a burner head of the stove burner, and the secondary air is formed by the burner. A gas stove is supplied to the outer periphery of an intermediate portion of the flame from between a juice tray installed below a cover and closing a lower part of the flame forming space and the burner cover.