JPH02267409A - Gas burner - Google Patents

Abstract

PURPOSE:To make the whole flame uniform and save the space required for the installation by providing a plurality of nozzles which have an air intake port for the combustion air and a mixing section and arranging them with an equal distance and placing them directly in a burner head. CONSTITUTION:A gas burner is constituted of a burner cap 22 and a burner head 23, and a group 24 of first flame openings, group 25 of second flame openings, first mixing chamber 26, second mixing chamber 27, and fourth air chamber 28 are formed. The bottom face of the burner head 23 makes tight contact with an air-hole plate 13, and a fifth air chamber 29 is formed with this air-hole plate 13 and the outer circumferential face of the burner head 23 and a chassis 12. Nozzles 19 have the same bore diameter and four of them are used. The end section of one nozzle is placed in the first mixing chamber 26 and the other three nozzles are positioned with an approximately same distance and placed in the second mixing chamber 27, and at the same time their bottom section is provided with an air suction port 30 from a third air chamber 14 which is formed with the chassis 12 and a base plate 8 and the air-hole plate 13. The air suction port 30 is for taking in the primary air for combustion. Since the air-hole plate 13 supplies a specified volume of air as the secondary combustion air, it has an air hole which corresponds to each air volume.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a gas combustion device for a gas stove.

2. Description of the Related Art Conventional gas combustion devices for gas stoves are generally of the Bunsen combustion type, as shown in FIG.
The gas and air are sucked in as primary air through a mixing tube 43 formed at the inlet of the burner cap 43, and are taken in as secondary air from around the flame opening of the burner cap 43 for combustion. The internal shape of the burner head 44 is determined so that the flames are mixed well and the size of the flame formed on the burner cap is approximately uniform.

Problems to be Solved by the Invention However, in such a conventional gas combustion device, the mixing tube 43 has an appropriate length and thickness to ensure good mixing of the gas and primary air, and the mixing tube 43 has an appropriate length and thickness to ensure that the entire flame is uniformly mixed. The burner head 44 is required to have a complicated internal shape in order to reduce the burner head 44, and the volume from the nozzle 41 to the flame port inevitably becomes large, resulting in loud extinguishing noise, high processing costs, and It has the disadvantage of requiring space.

The present invention eliminates the drawbacks of the conventional techniques described above, and aims to save installation space and reduce fire extinguishing noise.

Means for Solving the Problems In order to solve the above problems, the gas combustion device of the present invention has a tip facing inside the burner head, has a gas nozzle on the outside of the burner head, and has a gas nozzle and a gas nozzle on the outside of the burner head. A plurality of nozzles each having a combustion air inlet between the two are arranged at approximately equal intervals.

In other words, the gas combustion device of the present invention eliminates the mixing pipe by arranging the nozzle having the combustion air intake and the mixing part directly into the burner head, and also arranges a plurality of nozzles at approximately equal intervals. This makes it possible to make the entire flame uniform, simplify the internal shape of the burner head, and further reduce the internal volume.

EXAMPLE An example of the present invention will be described below with reference to the drawings. 1st
2, the configuration of the air control means 1 will be explained first. Inside the air control means main body (hereinafter referred to as main body) 2,
A first gas chamber 5 formed by a substrate 8 is formed on one side of the diaphragm 3, and a first air chamber 6 is formed on the other side, and an air control valve 7 is connected to the diaphragm 3. It is directly connected to the 6th side. The main body 2 also forms the valve seat 7a of the air control valve 7, and is configured to form the second air chamber 10 at the same time. The first air chamber 6 and the second air chamber 10 are the gap 2a between the air control valve 7 and the main body 2.
It is something that communicates through. The board 8 is further attached to a chassis 12, and the chassis 12 and the board 8 are connected to each other.
A third air chamber 14 is formed by the air hole plate 13 and the air hole plate 13 . The spring 15 presses the air control valve 7 toward the first gas chamber 5, and its pressing force is adjusted by an adjustment screw 16.

Next, as for the gas passage section, the outlet of the gas cock 17 and the second gas chamber 9 in the air control means 1 are connected by a gas conduit 18, and gas is supplied to the first gas chamber 5. A nozzle 19 having a certain small hole is directly connected to the substrate 8 that constitutes the earthen wall of the first gas chamber 5. Further, a blower 20 serving as an air supply means and the second air chamber 10 in the air control means 1 are connected by an air passage 21.

The gas burner is composed of a burner cap 22 and a burner head 23, and includes a first burner port group 24 and a second burner port group 2.
5. First mixing chamber 26, second mixing chamber 27, fourth air chamber 28
It forms the

The bottom surface of the burner head 23 is brought into close contact with the air hole plate 13, and a fifth air chamber 29 is formed by the air hole plate 13, the outer peripheral surface of the burner head 23, and the chassis 12.

The nozzles 19 have the same hole diameter and four are used,
One of the tips is placed in the first mixing chamber 26, and the other three are placed in the second mixing chamber 27 at approximately equal intervals, and
At its base, there is the third inlet for combustion and large air intake.
An air suction port 30 from the air chamber 14 is provided.

The air hole plate 13 is provided with air holes corresponding to each of the fourth air chamber 28 and the fifth air chamber 29 in order to supply a predetermined amount of air as secondary air for combustion to the fourth air chamber 28 and the fifth air chamber 29.

A plug 31 for ignition and a thermocouple 3 serving as flame detection means
2 are respectively located at the lower part of the second burner port group 25, and a burner port is formed only in that portion on the lower side of the burner head 23.

To explain the operation of the gas combustion apparatus configured as above, the gas cock 17 adjusts the required gas amount Q0 and supplies it to the nozzle 19. At this time, the gas pressure P in the first gas chamber 5 is It is proportional to the square of the quantity Qe.

P s = K + Q e ” (K +: proportionality constant) ...... ■ - On the other hand, 1 air chamber 6, 2nd air chamber l
The air pressure in the O1 third air chamber 14 is P+ -Pg, respectively.
, P2, the pressure receiving area of the diaphragm 3 is S9, the pressure receiving area of the air control valve 7 is Sv, and the pushing force of the spring 15 is W, then P c・sB+P2.5v=P +, S, +P, -
3v+W Here, P, = P, and SvζS, then p, = pG-w/sv ・・・・・・・・・・・・
......■Furthermore, the air suction port 3 of the nozzle 19
0 and the air holes provided in the air hole plate 13 have a fixed size, and if the amount of air supplied to the entire gas burner section is QA, then QA = 2-, /7T (Ka: proportionality constant) - @
■,■,From formula 0, ',Q,"・K3.QG"-to 4・W(K3.Ka:
Proportionality constant)...■In other words, the air IQ supplied to the gas burner section.

is determined by the gas amount QG and the pushing force W of the spring 15. If the blowing pressure P2 of the blower 20 is above a certain level, the air amount QA supplied to the gas burner section is determined by the blowing pressure P of the blower 20. , is irrelevant. This means that voltage fluctuations applied to the blower 20, differences due to power supply frequency, and changes in blowing pressure that occur when one blower supplies air to multiple gas burner sections can be completely ignored.

Also, the pushing force W of the spring 15 is calculated from the formula 0: W=Ks-P
a Ka-P3 C3s, Kh: constant of proportionality),
The required maximum air amount and the required minimum air amount are experimentally determined from the required maximum gas amount and the required minimum gas amount, and thereby the required pushing force and spring constant of the spring 15 are determined experimentally.

It is clear that when the gas is closed, the amount of air supplied to the gas burner section is also closed by the air control valve 7.

Next, in the unlikely event that the blower 20 stops due to some abnormality, the amount of air to be supplied to the gas burner section will disappear, and gas combustion will not continue.The thermocouple 32 will detect a misfire and shut off the gas (not shown). ).

Next, in the case of this embodiment, the first burner port group 24 and the second burner port group 2
5, and the heating power ratio was experimentally determined at a ratio of 1:3 based on the conditions for good heat distribution, and the purpose was to equalize the heating power of the second burner port group. In this case, four nozzles having the same hole diameter are arranged at a ratio of 1:3. Therefore, it is natural that only one nozzle is required for only one of the nozzle groups. Also nozzle 19
By providing an air intake 30 in the mixing chamber 26.
Even when the space 27 is narrow, it is possible to improve the mixing state of gas and air.

In this embodiment, when the top plate 33, the soup saucer 34, and the trivet 4 are arranged, and the pot 11 is placed on it, all the air necessary for combustion is forcibly supplied from inside, so the pot 11 and the soup saucer 34 are All you need to do is provide the space necessary to exhaust the combustion waste gas. (The height of the trivet 35 can be significantly lowered than before, improving thermal efficiency and making it easier to use.) It is something that improves.

Furthermore, the air volume control is highly responsive to changes in the gas volume, and the mixing chamber 26,27 can be made much narrower than before, which prevents misfires from occurring when the heating power is suddenly changed from maximum to minimum. It is possible to lower the limit.

As described in detail, the gas combustion device of the present invention has the following effects.

■ The nozzle with an air intake port enables reliable mixing of primary air and gas even in a narrow mixing chamber, eliminating the need for conventional mixing pipes, saving space and cost for equipment.

■ A stable flame can be obtained because multiple nozzles are arranged at approximately equal intervals.

■ Compared to conventional gas combustion equipment, the volume from the nozzle to the flame opening is smaller, so the extinguishing sound is lower.

■ Since the multiple nozzles are all the same, there is no chance of incorrect installation of nozzles during gas type conversion or repair work.

[Brief explanation of drawings]

Fig. 1 is a sectional view of the main parts of a gas combustion device according to an embodiment of the present invention, Fig. 2 is a sectional view of the same, Fig. 3 is a plan view of the main parts, and Fig. 4 is a sectional view of a conventional gas combustion device. It is.

Claims (3)

[Claims] (1) A burner cap that forms a flame port in the center and the outer periphery thereof, a first burner head that guides the mixed gas for combustion to the center flame port of the burner cap, and a flame in the outer periphery of the burner cap. a second burner head that guides the mixed gas to the mouth; a first nozzle that spouts gas into the first burner head; and a plurality of second nozzles that jets gas into the second burner head. A gas combustion device equipped with (2) Claim (1) characterized in that the first nozzle and the plurality of second nozzles have the same shape, and the plurality of second nozzles are arranged at approximately equal intervals. Gas combustion equipment as described. (3) having a gas ejection hole on the outside of the first burner head and the second burner head, the tip thereof facing inside the first burner head and the second burner head, and the gas ejection hole Claim (1) or (2) characterized in that a first nozzle and a second nozzle each having a combustion air intake are provided between the first burner head and the second burner head. ) described gas combustion equipment.