JPH0233507A - Burner - Google Patents

Abstract

PURPOSE:To improve the combustion performances, such as CO/CO2, combustion noise, and ignition, and expand the range of the heat source functional capacity from the minimum to the maximum by mixing gas with a primary air to a satisfactory extent, straightening the flow of the mixed gas, pressurizing the mixed gas, feeding the mixed gas to flame ports under the optimum combustion state, and burning the mixed gas. CONSTITUTION:A primary air 3 partially sent from a case bottom 2 by a ventilation fan 13 is equalized in pressure by a primary air equalizing plate 15. Then, the air enters a mixing chamber 20 passing through a primary air passage 17 installed inside a gas equalizing chamber 19. On the other hand, a gas 2 is also equalized in pressure like the primary air 3 by the equalizing chamber 19, passing through a gas connection port 14, and a gas pipe 16, and enters the mixing chamber 20. The mixed gas composed by the gas 2 and the primary air 3 are equalized once again by an equalizing plate 22, rectified by a rectifying plate 23, increased to a pressure required for combustion by a pressurizing plate 7, then forced to reach the flame ports 9 under the optimum combustion state. The mixed gas 21 is discharged equally all over the flame ports 9, ignited in a part of the flame ports 9, thereby spreading the flames all over the flame ports 9.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to the construction of a burner device for a gas heat source machine.

2. Description of the Related Art In a conventional burner of this kind, as shown in FIGS. 4 to 7, combustion gas 2 discharged from a nozzle 1 is passed through a throat portion provided in a body 4 of the burner together with surrounding primary air 3. 5
The mixed gas becomes more mixed and increases the degree of mixing while passing through the entry passage 6 before being led to the upper part of the body 4. Here, the mixed gas is equalized in both quantity and pressure over the entire surface of the burner by the pressure equalizing plate 7, and is further pressurized by the pressure plate 8, increasing the speed and being led to the flame port consisting of the flame port 9 and the wire mesh 10, where it is guided into the surrounding area. Secondary air 1
1 to form a combustion flame. Depending on the capacity of the heat source device, the burner of this type is composed of a combination of a plurality of burners 12 and rectifying plates 13a and 13b for rectifying the secondary air supplied to each burner, as shown in FIG. Note that the number and shape of the current plates 13a and 13b differ depending on the number and arrangement of the burners 12.

Problem to be Solved by the Invention However, in the configuration as described above, the amount of gas and primary air that determines the burner capacity depends on the opening area of the throat portion 5 of the body 4, the distance between the throat portion 5 and the nozzle 1, and the nozzle. 1
It is determined by the discharge pressure of For example, if you increase the pressure and amount of gas to the required plate, the amount of primary air will decrease accordingly, and conversely, if you increase the amount of primary air, the gas will decrease. Therefore, the burner cannot be miniaturized. In addition, gas and primary air are mixed in an insufficient state between the short passage section 6 until they are led from the throat section 5 to the pressure equalizing plate 7, regardless of their respective pressures and amounts, so that some portions are filled with gas. reaches the pressure equalizing plate 7 with one part being dense and the other part being the opposite. Here, only the pressure is equalized regardless of the degree of mixing, and the pressure is applied by the next pressurizing plate 8 to reach the flame opening.

Therefore, combustion conditions such as 00/CO2 and flaming are just a matter of course, and there are large variations in the burner.To solve this, the distance of the passage 6 must be made longer, that is, the body 4 must be made larger. did not become. Furthermore, the performance, particularly the combustion capacity, of a burner device constructed by combining the burner described above and several rectifier plates 13a and 13b for secondary air, and in particular, the combustion capacity, is as follows. That is, since this is a combination of burners with large variations in combustion state, the variations are even larger. Further, in order to increase the maximum capacity J, the only way to increase the number of burners is to increase the number of burners, so miniaturization cannot be achieved. On top of that,
Because the mixture is mixed → equalized → pressurized in a short distance from the throat part 5 to the flame mouth part, the combustion noise is large and the minimum combustion amount that can maintain combustion as a burner, that is, the range from maximum to minimum combustion amount is very narrow. . Furthermore, when igniting the burners, even if one burner is ignited, the current plates 13a and 113b between the burners are blocked.
There have been various problems such as not igniting or it taking a long time to ignite all the burners.

The present invention solves the conventional problems, and the CO/C
The purpose is to eliminate problems such as O2, combustion noise, ignition and flame transfer, and to create a small burner device with a wide range of combustion capacity.

Summary of Means for Solving the Problems In order to solve the problems, the burner device of the present invention mixes gas and primary air in order to improve the mixing conditions of gas and primary air.
It is equipped with a structure that equalizes the pressure of each air, mixes it, and further rectifies and pressurizes it until it reaches the flame port.

Effects of the present invention With the configuration described above, the gas and primary air are sufficiently mixed, and the mixed gas is rectified and pressurized, so that the mixed gas can be delivered to the flame port in the optimal state for the combustion conditions. It can be fed and combusted, and therefore, it can be combusted under favorable conditions such that the amount of secondary air for combustion can be significantly reduced.

Example Embodiments of the invention will be described below with reference to the accompanying drawings.

Note that the same parts as in the conventional example are given the same reference numerals, detailed explanations are omitted, and different parts will be mainly explained.

In FIGS. 1, 2, and 3, there is a
A blower fan 13 for secondary air and a gas connection port 14 are attached. Further, inside the case bottom 12, there is a pressure equalization plate 15 for primary air, and a gas pressure equalization chamber 19 connected to the gas connection port 14 via a gas pipe 16 and having a primary air passage 17 and a gas discharge port 18. , mixing chamber and this mixing chamber 20V
A pressure equalizing plate 22 for the mixed gas 21 mixed from C is provided in this order. Furthermore, on the hill of the pressure equalizing plate 22, a mixed gas 21
A rectifying plate 23 and a pressure plate 7 are provided in this order, and a case 24 having a flame opening 9 on the chevron-shaped surface is joined to the case bottom 12 to form a tgrii structure.

In the E-filing, the primary air 3 sent in by the blower fan 13 from a part of the case bottom 12 is flattened by the primary air pressure equalizing plate 15, and the pressure is uniformly equalized over the entire surface. Next, the primary air passage 17 provided in the gas pressure equalization chamber
and enters the mixing chamber 20.

On the other hand, the gas 2 passes through the gas connection port 14 and the gas pipe 16, and the gas 2 whose pressure is equalized in the same manner as the primary air 3 through the gas pressure equalization chamber 19 and the gas discharge port 18 enters the mixing chamber 20. At the time of entering this mixing chamber 20, the primary air 3 as gas 2 has already been equalized in pressure, and is mixed under sufficiently favorable conditions to become a mixed gas 21. Furthermore, the mixed gas 21 whose pressure has been equalized again by the pressure equalization plate 22 is then rectified by the rectifying plate 23, and further pressurized by the pressure plate 7 to the pressure necessary for combustion.

In this way, the mixed gas 21 that has been sufficiently pressure-equalized, mixed, pressure-equalized, rectified, and pressurized reaches the flame port 9 in an optimal state for combustion.

The mixed gas 21 that has reached the flame port 91C in this way is ignited by an electrode or the like, but unlike the conventional example, this burner device does not have a combination of multiple burners and rectifying plates, but only the flame side of the burner. Therefore, a good mixed gas 21 is uniformly discharged over the entire surface of the flame port 9 in a small burner device.

After a part of the flame nozzle 9 is ignited, the flame spreads to the entire surface of the flame nozzle 9. In this way, since the combustion flame formed is combusted by the mixed gas 21 in the optimal condition as described above, not only CO/CO2 but also combustion noise are completely absorbed into the flame port 9. The necessary mixed gas 21 is sent in a constant amount and at a constant pressure, and is low enough to burn.

Also, even if you supply more gas 2 and primary air 3, or vice versa, the conditions of pressure equalization → mixing → pressure equalization → rectification → pressurization will not change. Pressurized mixed gas 21
The ratio of gas 2 to primary air 3 is always constant, so
This means that the maximum combustion is large and the minimum combustion is also smaller.

However, the effect is that the combustion capacity range can be considerably widened.

Effects of the Invention According to the burner device of the present invention, the following effects can be obtained.

(1) Since the gas and primary air are sufficiently pressure-equalized, mixed, pressure-equalized again, rectified, and then pressurized, an optimal mixed gas can be created. Therefore, combustion performance such as CO/CO2, combustion noise, and ignition is improved, and the range of maximum to minimum heat source function can be widened.

(2) Since the flame port is a continuous surface rather than a combination of multiple burners, there are no problems such as mistakes in flame transfer, and there is no need for secondary air baffle plates, etc., making the overall burner device more compact. .

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a burner device according to one embodiment of the present invention, and FIG.
The figure is an exploded perspective view of the burner device, FIG. 3 is a perspective view of a main part notch in the burner device, FIG. 4 is a perspective view of a main part notch in a conventional burner, and FIG. 5 is an external view of the burner device. FIG. 6 is an exploded perspective view of the burner device, and FIG. 7 is a sectional view of the burner. 2...Gas, 3...Primary air, 7...
... Pressure plate for mixed gas, 9 ... Fire mouth, 15
...Primary air pressure equalization plate, 19...Gas pressure equalization chamber, 20...Mixing chamber, 21...Mixed gas, 22...・Pressure equalization plate for mixed gas, 23...
···rectifier. Name of agent: Patent attorney Shigetaka Awano and 1 other person 1st
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Claims (1)

[Claims] A primary air pressure equalization plate, a gas pressure equalization chamber, this gas pressure equalization chamber and 1
A mixed gas pressure equalizing plate that forms a mixing chamber in which the primary air is mixed with the gas pressure equalized by the secondary air pressure equalizing plate, a mixed gas rectifying plate provided downstream of this mixed gas pressure equalizing plate, and A burner device consisting of a pressure plate and a continuous flame port.