JPS61161322A - Burner device - Google Patents

Abstract

PURPOSE:To enable a formation of a stable flame at a primary flame hole without causing gas to be adhered to a tube by a method wherein two primary air holes of which distances from the nozzle is different to each other are formed at one side surface of the tube near the nozzle of the inner tube as well as the fixing component parts for use in fixing an inner pipe and the nozzle. CONSTITUTION:Gas is supplied from a gas supplying body 14, passed through a nozzle 4 and injected into a tube. The gas fed out of the nozzle 4 may absorb the air from the primary air hole 10 and at the same time absorbs the air from the primary air hole 11 with a slight time difference. At this time, the air absorbed due to the time difference becomes a circulating flow and uniformly mixed with the gas fed out of the nozzle while being circulated. In this way, the gas and the air become the desired premixed condition, the short stable premixing flame is formed at the primary flame hole, then the remained non-burned constituent may form the secondary flame at the secondary flame hole together with the auxiliary air holes arranged at the outer tube. When a primary flame sensor element is arranged between the primary flame hole and the secondary flame hole, the unit may be used as a burner for detecting a lack of oxygen.

Description

[Detailed description of the invention] Industrial applications The present invention relates to household combustion appliances.

2. Description of the Related Art As shown in FIG. 3, a conventional burner device of this type includes a burner a having a flame hole 2 at one end of a tube 1 having a certain distance, and a nozzle 4 at a position facing the flame hole 3. Let me come,
A primary air hole 5 is provided through the side of the burner 3 near the nozzle/L/4, and the suction of primary air from the primary air hole 6 is utilized by the ejector effect caused by the ejection of gas from the nozzle. The premixed gas is mixed in the tube 1, and a flame is formed in the flame hole 2 as a premixed gas.

Also, in the type that separates the flame (Fig. 4), the child device is the inner tube a, an outer tube 7 is provided to completely separate the flame of the inner tube 3, and the inner tube 3 has the primary flame F1. The outer tube 7 was configured to form two flames F2.

Problems to be Solved by the Invention However, in the above configuration, in order to improve the mixing of gas and air, it is necessary to make the inner tube long and increase the resistance inside the tube to sufficiently develop the flow. Ta. In addition, the primary air hole is provided near the nozzle, penetrating the side surface of the tube in a direction perpendicular to the nozzle ejection direction, and the primary air hole, tube, and primary flame hole are symmetrical with respect to the gas ejection direction. Therefore, when the flow rate of gas coming out of the nozzle is small, the pressure balance on both sides immediately after ejection is lost, and the ejected gas adheres to the side of the tube.

As a result, the flame becomes extremely long and the primary air ratio is reduced. There are dimensional tolerances in actual burners,
It is natural for the center of the nozzle to shift, and this will definitely cause adhesion, making it impossible to reduce the size of the burner completely. When in use, as shown in FIG. 12, there was a problem in that the primary flame extended beyond the position of the primary flame detection element and did not change much even during oxygen deficiency.

The present invention aims to solve such conventional problems, and aims to eliminate the adhesion of ejected gas to the tube, ensure a constant primary air ratio, and form a stable and short flame.

Means for Solving the Problems In order to solve the above problems, the burner device of the present invention has an inner tube 3 having a primary flame hole 2 at one end of the tube 1 having a certain distance, and a primary flame as described in A nozzle hole 4 facing the other end of the tube 1 facing the hole 2, a fixing part 5 for fixing the inner tube 3 and the nozzle hole 4, and a secondary flame hole separated from the first flame hole 2. 6, an auxiliary air hole 8.9 is provided for supplying limited secondary air to the outer tube 7, and a nozzle 4 is provided on the side of the tube 1 near the nozzle 4 of the inner tube 3. It has a structure in which two primary air holes 10.11 are provided at different distances from each other.

Function: With the above-described configuration, the present invention allows the gas ejected from the nozzle to suck in and mix a certain amount of air from the primary air hole without adhering to the tube, thereby forming a stable flame at the primary flame hole. be.

Embodiments Hereinafter, embodiments of the present invention will be described based on the accompanying drawings. In FIG. 1, an inner tube 3 with one end of the tube 1 serving as a primary air hole 2, a nozzle v4 facing the other end of the tube 1 facing the primary flame hole 2, and a connection between the inner tube 3 and the nozzle. 4, and an outer tube 7 that separates the primary flame hole 2 to form a secondary flame hole 6, and a limited amount of secondary air is supplied to the outer tube 7. An auxiliary air hole 8.9 is provided, and two primary air holes 10.11 at different distances from the nozzle 4 are provided on the side of the tube 1 near the nozzle 4 of the inner tube 3. In addition to being used as a low NOx burner, this burner device can also be used as a burner for detecting oxygen deficiency. Detector insertion hole 12 provided in outer tube 7 between F2
A primary flame detection element 13 (for example, a thermistor for detecting temperature, a flame rod for detecting thermocouple ion current, a light detection element for detecting light, an oxygen sensor for detecting oxygen concentration, etc.) is provided through the flame detection element.

In this case, the fixing part 5 is a fukuronut, and a rosette 15 is inserted between the nozzle 4 and the gas supply body 14, and the fukuronut 5 connects the nozzle 4 and the backing 1.
5 is fixedly sealed to the gas supply body 14. 15 is a filter, and 16 is a detection element stand.

In the above configuration, gas is supplied from the gas supply body 14, passes through the nozzle 4, and is ejected into the tube. The gas coming out of the nozzle 4 sucks air from the primary air hole 10 and also sucks air from the primary air hole 11 with a slight time difference. At this time, if the air is sucked in due to the above-mentioned suction time difference, the air becomes a traveling flow and is uniformly mixed with the gas coming out from the nine nozzles while traveling. In this way, the gas and air reach a predetermined premixed state, and a short, stable premixed primary flame is formed in the primary flame hole, and the remaining unresolved components are transferred to the secondary flame along with the auxiliary air holes provided in the outer tube. It has the effect of forming a secondary flame in the holes.

Furthermore, by providing a primary flame detection element between the primary flame hole and the secondary flame hole, this burner device can be used as a burner for oxygen deficiency detection. That is, under normal conditions, the primary flame and the secondary flame are formed separately as described above, and the primary flame is short and stable, so the primary flame detection element can detect the primary flame. On the other hand, in the event of an abnormality such as oxygen deficiency, the primary flame extinguishes and moves to the secondary flame hole, so the primary flame detection element can detect the absence of the primary flame.

The same is true for the so-called normal Bunsen burner type, which has only an inner tube without an outer tube. By setting a difference in the suction time of the primary air, a swirling flow is generated inside the burner, and a stable Bunsen burner is generated in the flame hole. It is what causes the flame to form.

As described in detail, the burner device of the present invention provides the following effects.

(1) Since the distances between the two primary air holes from the nozzle are different, the primary air is not sucked in symmetrically with respect to the center of the nozzle, but is sucked in while traveling around.

Therefore, gas and air are mixed in a short tube, resulting in a burner device with low resistance inside the tube and a short length, making it easy to downsize the entire burner device.

(A stable conical flame is formed even when the gas flow rate is low, without the primary air ratio becoming extremely low or the flame becoming elongated due to adhesion to the inner wall of the two pipes.) By making it a separate flame type with an inner tube and an outer tube, it can be used as a burner for detecting oxygen deficiency, but since there is no adhesion to the inner tube wall, under normal conditions the flame is conical in the inner tube, whereas when oxygen is lacking Because it moves to the outer tube, it can be seen largely during the change.

(1) and (2) As is clear from the contents of (1) and (2), in a simple burner that uses a straight pipe from the nozzle to the flame hole as the mixing tube and flame hole, it is difficult to reduce the size However, according to the present invention, by providing a difference in the suction time of the primary air, it is possible to create a gas with a simple shape. Although the device is sufficiently miniaturized with normal dimensional tolerances, it is possible to produce a stable flame as a device.

[Brief explanation of drawings]

FIG. 1 is an external perspective view of a burner device according to an embodiment of the present invention;
FIG. 2 is a sectional view of the same, FIG. 3 is a sectional view of a conventional burner device, and FIG. 4 is a sectional view of another conventional example. 1...tube, 2...primary flame hole, 3
...Inner tube, 4...Nozzle, 5...
・・Fixed parts, 6・・Secondary flame hole, 7・・・・
・Outer tube, 8.9...Auxiliary air hole, 10.11・
...Primary air hole. Name of agent: Patent attorney Toshio Nakao and one other person
・・Chi1-fupa? ... f-Daienko L 3...Inner Arrival 4...Nosur〆,,,2>&Inspection J Shi7...Outer Maro 1,? ,,, 綽゛σ/7 Okijima 2nd figure 3rd rl! J Figure 4

Claims (2)

[Claims] (1) Consisting of a burner with one end of a tube as a flame hole, a nozzle facing the other end of the tube opposite to the flame hole, and a fixing part for fixing the burner and nozzle, and a part near the nozzle of the burner. A burner device with two primary air holes at different distances from the nozzle on the side of the tube. (2) A circular tube with one end of the tube as the primary flame hole, and
A nozzle facing the other end of the tube facing the next flame hole,
Auxiliary air comprising a fixing part that fixes the inner tube and the nozzle, and an outer tube that is separated from the primary flame hole to form a secondary flame hole, and supplies limited secondary air to the outer tube. Make a hole,
A burner device in which two primary air holes are provided at different distances from the nozzle on the side surface of the inner tube near the nozzle.