JP2835578B2 - Gas burner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas burner in which a plurality of burners are arranged side by side, and more particularly to an ignition device for the gas burner.

[0002]

[Prior art and its problems] In recent water heaters, the amount of combustion has increased, and in order to cope with this, a gas burner in which a plurality of burners alone (B ₁ ) (B ₁ ) are arranged side by side is required. Has been adopted. As the ignition system to the gas burner, a predetermined adjacent burner alone (B ₁₎ (B ₁₎ between, on the manner to protrude upwardly with Sowaseru on the side of one side of the burner itself (B ₁₎ Insert the electrode plate (T) and place the burner unit (B
Flame hole of ₁₎ (B ₂₎ electrodes of the spark plug (P) upwardly (P ₁₎ provided in the cathode part provided on the upper side of the electrode portion (the electrode plate from P ₁₎ (T) ( T ₁ ), the electrode section
A method of igniting the gas ejected from the flame hole portion (B ₂ ) of the burner unit (B ₁ ) directly below (P ₁ ) is adopted.

However, in this case, the electrode plate (T)
Is the burner alone (B₁) (B₁)
Therefore, the cathode (T) of this electrode plate (T)₁) And the above electrode part (P₁)
Accuracy tends to be insufficient. Variation of the interval
Is large, the ignition performance becomes unstable. On the other hand,
In order to solve the problem of (1), the electrode (P ₁)
Burner only (B directly below)₁Attach the electrode plate (T) to the side of
It is conceivable to adopt a configuration in which
And other operations are required.
Difficult to use.

[0004] Also, in this compound, after igniting the burner itself just below the electrode portion _{(P 1) (B 1)} , adjacent the burner itself (B ₁₎
It is necessary to make the fire burn smoothly.
Since the secondary air is rising from below between (B ₁ ) and (B ₁ ), the fire is easily hindered.

[0005]

The present invention has been made in view of such a point.
`` Multiple burners alone (B₁) (B ₁) Gas bar
And the adjacent burner alone (B₁) (B₁), One side
Burner only (B₁) And project upward
In the aspect, the cathode part (T₁) Is provided with a plate-shaped electrode plate (T)
Insert and arrange the burner unit (B₁) Flame hole (B_Two)
Above the spark plug (P) electrode (P₁), And this electrode
(P₁) To the cathode (T) of the electrode plate (T).₁)
Gas burner with fire ”
In addition to stabilizing the ignition performance, the burner alone (B₁) (B₁)
The task is to improve mutual fire.

[0006]

Technical Means The technical means of the present invention for solving the above-mentioned problem is that "the electrode plate (T) is located near the lower part of the cathode part (T ₁ ) and on the side opposite to the electrode part (P ₁ ). Form a protruding convex part (T ₂ ),
A convex portion (T ₂₎ forming part of the electrode plate (T), was pressed between the electrode portions burner alone (B ₁₎ and the burner itself adjacent thereto directly under the (P ₁₎ (B ₁₎ ] That is.

[0007]

The above technical means operates as follows. In this construction, since the projecting portion of the electrode plate (T) (T ₂₎ forming portion is pressed between adjacent burners alone _{(B 1) (B 1)} , the convex portion of the electrode plate (T) (T ₂ ) Is in contact with the side of one burner unit (B ₁ ), and the top of the projection (T ₂ ) is the other burner unit (B ₁ ).
₁ ) Attached to the side. Therefore, the electrode plate (T) is on one side, that is, just below the electrode part (P ₁ ), and the burner unit (B ₁ )
Is in a state of being attached and fixed. Thereby, the electrode portion (P ₁ ) positioned in relation to the flame hole portion (B ₂ ) of the _one burner unit (B ₁ ) and the cathode portion (T ₁ ) of the electrode plate (T) The gap accuracy is sufficiently ensured.

[0008] Also, between the above one side of the burner itself and (B ₁₎ and the other side of the burner itself (B _1), the electrode plate (T) and this convex portion
With (T ₂ ), a shielding portion for shielding the rise of the secondary air is formed.

[0009]

[Effect] Since the gap accuracy between the cathode portion (T ₁ ) and the electrode portion (P ₁ ) of the electrode plate (T) is sufficiently ensured, the ignition performance is stabilized. Further, since the electrode plate (T) is merely provided with the projection (T ₂ ), the configuration of the electrode plate (T) is simplified. Also, the burners alone (B ₁ ) and (B ₁ ) on both sides of the electrode plate (T)
_{Since the} secondary air shield is formed during ₁ ), the flow of secondary air in the upper region does not occur. Therefore, the electrode portion (P ₁₎ the other side of the burner itself from one side of the burner itself (B ₁₎ immediately below the (B ₁₎
It is easy to transfer to fire. In addition, the turbulence of the air flow and the gas flow at the time of the fire transfer ensures the transfer of the fire to the other burners (B ₁ ) and (B ₁ ). Thereafter, each burner unit (B ₁ ) burns stably.

Further, even when an external force acts on the electrode plate (T) at the time of assembling the gas burner or the like, the electrode plate (T) and its convex portions are not affected.
Since (T ₂ ) is sandwiched between the burners (B ₁ ) and (B ₁ ), the cathode (T ₁ ) of the electrode plate (T) and the electrode (P
₁ ) It is hard to cause a gap in the gap.

[0011]

Next, an embodiment of the present invention will be described in detail with reference to the drawings. In this embodiment, the present invention is applied to a combustion device of a water heater. As shown in FIG. 1, the water heater has a heat exchanger above a burner box (1) having a combustion chamber. The built-in can body (K) is connected continuously. The burner box (1) is formed into a bottomed rectangular tube as a whole, and a gas burner (B) and a gas supply pipe (N) for supplying gas to the burner box (B) are built in the empty room. I have. or,
An air supply passage (R) for supplying the combustion air to the gas burner (B) is connected to the bottom of the burner box (1). Incidentally, the can body (K) and its heat exchanger, etc.,
A known configuration is employed.

As shown in FIGS. 1 to 3, the gas burner (B) is provided with a rectangular box (2) formed of a thin metal plate and having an open upper end, and is provided in the box (2). And a large number of burners (B ₁ ) and (B ₁ ). The burner alone (B ₁ )
(B ₁ ) is a flat shape that is long in the front-rear direction (the left side in FIG. 1 is the front) of the appliance and in the vertical direction.
₁ ) (B ₁ ) are juxtaposed in the left-right direction in the box (2). The upper end of these burners (B ₁ ) and (B ₁ )
(B ₂ ) and (B ₂ ), and below these flame holes (B ₂ ) and (B ₂ ) are passages for the primary air-gas mixture to these. Furthermore, each burner unit (B ₁ ) is a so-called light and dark burner.
That is, in the flame hole portion (B ₂ ), first flame holes (H ₁ ) for ejecting the air-fuel mixture having a high gas concentration are provided at both ends in the left-right direction, and these first flame holes (H ₁ ) ( H ₁ ), a second flame hole (H 2) composed of a plurality of rows of flame holes for ejecting the mixture having a low gas concentration.
₂ ) is provided.

Further, the burner unit (B ₁ ) has a burner body configuration in which a burner body having a high gas concentration and a burner body having a low gas concentration are overlapped with each other. The nozzles (N ₁ ) and (N ₁ ) correspond to each other. In other words, the front plate (21) of the box body (2) is a burner alone (B ₁₎ (B ₁₎ is aligned with the primary air inlet lower end provided at a front portion of the opening (25) (25) is formed The nozzles (N ₁ ) and (N ₁ ) provided in the gas supply pipe (N) in the front empty space (14) described later face these openings (25) and (25), respectively. Then, each nozzle (N
By setting the suction ratio of the gas from ₁ ) and the primary air from the front empty space (14) to a predetermined value, the above-described two types of air-fuel mixtures are generated.

The bottom wall of the box (2) is composed of a pair of dispersing plates (23) and (24) arranged vertically one above the other. Vent holes are provided.
The bottom plate (12) of the burner box (1) is provided with the air supply passage.
(R) are connected to each other, and combustion air is supplied to the bottom of the burner box (1) by a fan (not shown) incorporated in the air supply passage (R). At the bottom of the burner box (1), an empty space (15) is formed between the bottom plate (12) and the dispersion plate (23) below the box body (2), and this is a gas burner (15). It communicates with the vacant room (14) in front of B). With this configuration, a part of the combustion air supplied from the air supply passage (R) is supplied as primary air to the front empty chamber (14) via the empty chamber (15), and Is a gas burner via the distribution plates (23) and (24).
(B) is supplied as secondary air.

Further, the burner box (1) has a front plate (11).
Is the ignition device (C), flame rod for flame detection, etc.
A detector (S) consisting of The ignition device
The arrangement (C) consists of a spark plug (P) and its electrode (P₁) And opposite
The electrode plate (T) is formed from the end.
The third and fourth burners alone (B₁) (B ₁In the meantime, these flames
Hole (B_Two) (B_TwoInsertion)
Have been. In addition, the electrode portion (P₁)
The wire is formed by bending the wire into an L shape, and its tip is
The fourth burner alone (B₁) Flame hole (B_Two2nd flame hole in)
(H_Two) Is located above the center in the left-right direction.

As shown in FIGS. 4 and 5, a triangular cathode (T ₁ ) is provided on the upper side of the tip of the electrode plate (T).
The cathode (T ₁ ) is provided with an electrode (P
₁ ), that is, the third burner alone (B
₁ ) A frusto-conical projection (T ₂ ) protruding toward the side is provided by drawing. Then, the projection (T ₂ ) forming portion of the electrode plate (T) is the third and fourth burner simple substance (B ₁ )
(B ₁ ). For this reason, the width of the protrusion (T ₂ ) forming portion in the left-right direction of the electrode plate (T) is slightly larger than the interval between the burners (B ₁ ) and (B ₁ ) (a loose tight fit). ) Is set. In this embodiment, the convex portion (T ₂ ) is manufactured by drawing, but it goes without saying that the convex portion (T ₂ ) may be formed by another manufacturing method. Further, the convex portion (T ₂ ) may have a shape other than the above, for example, a rectangular parallelepiped shape or a cylindrical shape.

Further, as shown in FIGS. 2 and 3, the detector (S) is provided with a flame hole (B ₁ ) of the third burner unit (B ₁ ) from the end.
The detector (S ₁ ) is mounted above the front part of ₂ ). When the gas burner (B) having the above configuration is ignited, sparks are emitted from the electrode portion (P ₁ ) of the ignition plug (P) to the cathode portion (T ₁ ) of the electrode plate (T). As a result, the air-fuel mixture ejected from the flame hole portion (B ₂ ) of the fourth burner unit (B ₁ ) is ignited.

[0018] At this time, the spark is discharged from the gas mixture ejection region (above the second flame hole (H ₂ )) having a low gas concentration to the gas mixture ejection region (first gas hole (H ₁ )) having a high gas concentration. ), And passes through the appropriate ignition concentration range existing in the ignition discharge path. The tip of the electrode plate (T) is
₂ ) By press-fitting, the burner unit (B ₁ ) (B ₁ ) on both sides of this is in contact with the side of the burner unit, and the cathode (T ₁ ) and the electrode of the electrode plate (T)
The gap accuracy with (P ₁ ) is sufficiently ensured. From these, the above-mentioned ignition is ensured. After the ignition, the flame of the unstable second flame (H ₂ ), which is easy to lift, is surrounded by the stable flame of the first flame (H ₁ ). The entire flame of B ₁ ) burns stably.

While the secondary air rises from below between all the burners (B ₁ ) and (B ₁ ), the third and fourth burners (B ₁ ) and (B ₁ ) ), Between the electrode plate (T)
The secondary air shielding portion is formed by sandwiching the convex portion (T ₂ ) forming portion of the above, so that the secondary air does not flow in the upper region. Thus, as readily flame diffusion from the fourth burner alone (B ₁₎ to said third burner alone (B _1). In addition, due to the turbulence of the air flow and gas flow at the time of the fire transfer, the third and fourth burners alone (B ₁ ) and (B ₁ ) other than the burners alone (B ₁ ) (B ₁ ) can be easily transferred. Fire transfer. Therefore, in the gas burner (B), all the burners (B ₁ ) and (B ₁ ) instantaneously enter the combustion state after the spark. Thereafter, all the burners (B ₁ ) and (B ₁ ) burn stably.

In this case, the mixture having a high gas concentration ejected from the first flame hole (H ₁ ) is compared with the mixture having a low gas concentration ejected from the second flame hole (H ₂ ). Since the amount is small, the high concentration region is formed in a lower range than the low concentration region adjacent thereto, but the cathode portion (T ₁ ) of the electrode plate (T) has a first flame hole (H ₁ ) , The ignition discharge path surely passes through the high concentration region. Therefore, the spark surely passes through the proper ignition concentration region formed between the high concentration region and the low concentration region, and the ignition is performed satisfactorily.

[Regarding Modification] The burner unit (B ₁ ) (B ₁ ) is not limited to the above-described shape and configuration. When the burners alone (B ₁ ) and (B ₁ ) are light and dark burners, other than the above, as long as the first flame holes (H ₁ ) and the second flame holes (H ₂ ) are alternately arranged in parallel. A flame hole portion (B ₂ ) having the configuration can be adopted. Further, the burners (B ₁ ) and (B ₁ ) need not be light and light burners.

[0022] The present invention can be applied to gas burners other than water heaters.

[Brief description of the drawings]

FIG. 1 is a sectional view of a water heater according to an embodiment of the present invention.

FIG. 2 is a top view of the gas burner (B).

FIG. 3 is a front view of this.

FIG. 4 is a top view of a main part of the embodiment.

FIG. 5 is a cross-sectional view of a main part thereof.

[Explanation of symbols]

(B ₁ ) ・ ・ ・ Burner alone (T) ・ ・ ・ Electrode plate (B ₂ ) ・ ・ ・ Flame hole (P) ・ ・ ・ Spark plug (P ₁ ) ・ ・ ・ Electrode part (H ₁ ) ・ ・・ First flame hole (H ₂ ) ・ ・ ・ Second flame hole

Claims (2)

(57) [Claims] 1. A plurality of burners alone (B ₁₎ comprising (B ₁₎ a gas burner which is parallel, adjacent the burner itself (B ₁₎ (B ₁₎ between one side of the burner itself (B ₁ )) And a plate-like electrode plate (T) provided with a cathode part (T ₁ ) on the upper side in a manner to be attached to the side part and protrude upward, and the burner unit (B ₁ ) on the one side is inserted. The electrode part (P ₁ ) of the spark plug (P) is provided above the flame hole part (B ₂ ),
In the gas burner configured to discharge and ignite the electrode portion (P ₁ ) to the cathode portion (T ₁ ) of the electrode plate (T), in the vicinity of the electrode plate (T) below the cathode portion (T ₁ ), A protruding portion (T ₂ ) projecting on the opposite side to the electrode portion (P ₁ ) is formed.
A gas burner in which a convex (T ₂ ) forming portion of (T) is press-fitted between a burner unit (B ₁ ) immediately below an electrode unit (P ₁ ) and a burner unit (B ₁ ) adjacent thereto. 2. Each burner alone (B₁) Flame hole (B_Two), Takano
The first flame hole (H₁) And a second flame port (H_Two)
Are alternately arranged in parallel, and the flame hole (B _TwoAt the edge of
Is the first flame hole (H₁) And the second inside of this
Flame hole (H_Two) Above the electrode (P₁) Is provided.
Gas burner.