JPS6350576Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to a burner, and more specifically, a partition plate having a substantially U-shaped cross section is provided to partition a combustion section and an air supply chamber, and a recessed portion of the partition plate is provided. A fuel gas supply pipe is disposed within the partition plate in an orientation along the extending direction of the partition plate,
A row-shaped group of gas jetting ports each spouting fuel gas toward both side inclined wall surfaces of the partition plate is connected to the fuel gas supply pipe, and a row-shaped gas jetting port jetting combustion air toward the gas jetting port group. A group of air jet ports are formed on each of the inclined wall surfaces so that the gas jet ports and the air jet ports are located alternately in the extending direction of the partition plate, and the mutually different arrangement allows the jetting of fuel gas. , and, as the combustion air is jetted out, a swirling flow is generated in the air portion located between the gas jetting port and the air jetting port that are adjacent to each other, thereby causing the jetting fuel gas and the jetting combustion air to flow together. The present invention relates to a burner parts assembly structure that enhances the mixing effect and improves combustion performance.

[Conventional technology]

Conventionally, when assembling a partition plate and a fuel gas supply pipe in a burner such as the one described above, it has been necessary to adjust the relative phase of the air outlet formed in the partition plate and the gas outlet formed in the fuel gas supply pipe in the direction in which the partition plate extends. While visually checking, carefully align the partition plate and the fuel gas supply pipe on the order of, for example, 1/10 mm, and then align the partition plate and the fuel gas supply pipe until the relative phases of both jet ports are in a predetermined staggered phase. The gas supply pipe was fixed to the burner casing by bolt connection or the like (I cannot provide any literature).

[Problem that the invention attempts to solve]

However, in this type of burner, whether or not the relative phase between the fuel gas nozzles and air nozzles, which are arranged alternately, is appropriate is an important point in determining the quality of combustion performance. When assembling while performing delicate positioning operations by visual confirmation, assembly errors are likely to occur, and due to these assembly errors, the relative phase between the fuel gas nozzle and the air nozzle may become inappropriate. There was a problem in which the combustion performance deteriorated significantly. In addition, there was also the problem that the assembly efficiency was reduced because the assembly was performed while performing delicate positioning through visual confirmation.

The purpose of this invention is to rationally improve the parts assembly structure so that the partition plate and the fuel gas supply pipe can be
The purpose is to provide accurate relative phase between the fuel gas nozzle and the air nozzle, and to enable easy and efficient assembly.

[Means for solving problems]

The characteristic configuration of the burner parts assembly structure according to the present invention is that the partition plate has a substantially U-shaped cross section and has a row-shaped group of air jet ports, and the fuel gas supply pipe has a row-shaped group of gas jet ports. , such that the fuel gas supply pipe is located in the recess of the partition plate in a posture along the extending direction of the partition plate, and the gas jet ports and the air jet ports are staggered in the extending direction of the partition plate. When assembling the partition plate in such a manner that the
A stopper is provided, which forms a hole for inserting the fuel gas supply pipe into the recess of the partition plate, and defines the insertion depth of the fuel gas supply pipe into the hole by contacting the outer surface of the burner casing forming wall. The partition plate is held in the extending direction by the cooperation of the inner surface of the burner casing forming wall and a spring that is attached to the fuel gas supply pipe and urges the partition plate toward the inner surface. In particular, its actions and effects are as follows.

[Effect]

That is, with the above configuration, the fuel gas supply pipe is positioned by the abutting action of the stopper against the outer surface of the burner casing forming wall as it is inserted into the hole, and the partition plate is positioned by the inner surface of the burner casing forming wall and the spring. As the fuel gas supply pipe and the partition plate are inserted into the partition plate, both the fuel gas supply pipe and the partition plate are held in position by the receiving action of the inner surface of the burner casing forming wall and the biasing action of the spring. The positioning is automatically performed during assembly with reference to the same burner casing forming wall located at one end in the extending direction.

[Effect of idea]

As a result of the above, compared to the conventional method of assembling and fixing the partition plate and fuel gas supply pipe while performing delicate positioning through visual confirmation, assembly errors can be effectively avoided and the fuel gas nozzle Since the air jets and the air jet ports can be arranged relative to each other in a predetermined staggered phase with extremely high precision, it has become possible to reliably improve combustion performance through the staggered arrangement.

Furthermore, the fuel gas supply pipe only needs to be inserted into the hole, and the partition plate only needs to be clamped between the burner casing forming wall and the spring, without requiring delicate alignment by visual inspection. This simplifies the assembly work and improves the efficiency of the assembly work, thereby improving the productivity of the burner.

〔Example〕

Next, embodiments of the present invention will be described based on the drawings.

6 and 7 show a gas instantaneous water heater, 1
2 is a water tube type water heating heat exchanger, 2 is a burner, and 3 is a fan for supplying combustion air.

The heat exchanger 1 is housed in a combustion chamber forming casing 5 whose one end opening is connected to the exhaust port 4, and the combustion chamber forming casing 5 is formed into a cylindrical shape with a rectangular cross section. There is.

The burner 2 is housed in a burner casing 6 having the same rectangular cross-sectional shape, and the combustion chamber forming casing 5 and the burner casing 6 are joined by a flange.

The fan connection side portion of the burner casing 6 is formed into a hopper type wind guide 6A, and the fan 3 is connected to the inlet side opening of the hopper type wind guide 6A.
Burner casing 6
and the fan casing 3A are connected.

Fan 3 uses a cross-flow fan,
With respect to the cylindrical shape having a rectangular cross section extending from the combustion chamber forming casing 5 to the burner casing 6, the cross-flow fan 3 is designed so that almost the entire cross-flow fan 3 is accommodated in the virtual extension of the cylindrical shape, and the cylindrical shape is The cross-flow fan 3 is arranged so that the fan rotation axis P is oriented in the long side direction of the rectangular cross-sectional shape.

That is, by using a cross-flow fan as the fan 3 and arranging the cross-flow fan 3 as described above, the water heater is made thinner.

In addition, since the transverse fan 3 is equipped with a slit-shaped discharge port that covers almost the entire width in the direction of the rotation axis P, the hopper-type wind guide 6A has a slit-like discharge port that extends along the short side of the rectangular cross-sectional shape of the cylindrical shape. It has a hopper shape in which the air passage width increases only in the direction of the water heater's thickness.

At the outlet side opening and the inlet side opening of the hopper type wind guide 6A, punching plates 7 and 8 for regulating the air are stretched over the entire surface of each opening, and the fan casing From the tongue part 3a of the fan casing 3A, a guide tongue piece 9 with an inclined posture that promotes dispersion of the air discharged from the fan 3 in the thickness direction of the water heater is connected over almost the entire width in the longitudinal direction of the fan casing 3A. It is set up.

In the figure, 10 is an exterior casing of the water heater, 11 is an intake port for intake of combustion air, and 12 is a fan drive motor.

Next, the specific structure of the burner 2 will be explained. In addition, hereinafter, the long side direction and the short side direction of the rectangular cross-sectional shape of the cylindrical shape are simply referred to as the long side direction and the short side direction, and the cylindrical axis direction of the cylindrical shape is simply referred to as the cylindrical axis direction. .

As shown in FIGS. 1 to 5, the burner casing 6 has a U-shaped portion 13a as a cross-sectional shape when viewed in the long side direction, and linear portions 13b as legs continuous to both ends of the U-shaped portion 13a. A plurality of bent partition plates 13 covering almost the entire width in the long side direction are installed in the burner casing 6 on the air conditioning punching plate 7 of the hopper type wind outlet side opening, respectively, in the short side direction of the burner casing 6. The space surrounded by the air conditioning punching plate 7 and the partition plate 13, which are arranged side by side over the entire width thereof, is defined as an air supply chamber a that receives the combustion air that has passed through the air conditioning punching plate 7.

Then, each of the partition plates 13 has a cross-sectional shape U
The fuel gas supply pipe 14 is disposed in the recess formed by the character-shaped portion 13a in a posture along the extending direction of the partition plate 13 and over almost the entire width in the long side direction of the burner casing 6. , partition plate 13
A fuel gas supply pipe 14 is connected to a group of 15 rows of gas ejection ports that eject fuel gas separately toward both side inclined wall surfaces 13c of each U-shaped section 13a.
In addition, a row of 16 groups of air ejection ports for ejecting combustion air from the air supply chamber a toward 15 groups of gas ejection ports is arranged on both inclined wall surfaces 13c of the partition plate 13.
Gas jet ports 15 and air jet ports 16 facing each other are formed so as to be alternately located in the long side direction (direction in which the partition plate extends).

In other words, the burner 2 is operated for combustion by using the side of the space partitioned by the partition plate 13 in the direction of the cylinder axis where the U-shaped section of the U-shaped section 13a opens as the combustion section. Due to the staggered arrangement of the gas jet ports 15 and the air jet ports 16, as fuel gas and combustion air are jetted out, a swirling flow is generated in the space located between the gas jet ports 15 and the air jet ports 16 that are adjacent to each other in the long side direction. This increases the mixing effect between the jetted fuel gas and the jetted combustion air, thereby improving combustion performance.

In addition to the air outlet 16, an auxiliary air outlet 17 having a smaller opening area is provided at a U-shaped portion 1 with a U-shaped cross section than the formation position of the air outlet 16.
3a, partition plates are arranged in parallel in the extending direction (longitudinal direction) with respect to each of both inclined wall surfaces 13c at half the pitch of the parallel arrangement pitch of the air jet ports 16, and the air supply chamber a is A portion of the supplied combustion air is also ejected from these auxiliary air ejection ports 17, thereby reducing the flame hole load and muffling combustion noise.

In the entire width of the partition plate 13 in the extending direction, the bottom surface of the recess formed by the U-shaped cross-sectional portion 13a and the outer peripheral surface of the fuel gas supply pipe 14 are connected to both inclined wall surfaces 1.
3c, the combustion flame is prevented from going around to the bottom side of the recess due to the negative pressure hole in the recess due to the draught action, and the combustion flame is The fuel gas supply pipe 14 and the partition plate 13 are prevented from being overheated due to wraparound, thereby improving thermal durability.

In addition, when viewed in the extending direction (long side direction) of the partition plate 13, the gas outlet 15 and the air outlet 16 are as follows.
A portion of the air ejected from the bottom side end of the recess in the opening shape of the air ejection port 16 flows into the fuel gas supply pipe 14.
are arranged so that the air is blown onto a portion of the outer circumferential surface of the concave portion located closer to the bottom of the recess than the gas outlet 15, whereby a portion of the air is used as cooling air to prevent the above-mentioned overheating. It is designed to more effectively prevent heat and further improve thermal durability.

On the other hand, when installing the partition plate 13 on the punching plate 7 of the hopper type wind outlet side opening, the edges of the straight portions 13b on both sides as legs in the M-shaped cross section are In addition to contacting the punching plate 7 over its width, the bottom of the U-shaped cross-sectional portion 13a is also brought into contact with the punching plate 7 over its entire width in the extending direction of the partition plate 13. The cross-sectional shape is formed, and the U
The contact between the bottom of the character-shaped portion 13a and the punching plate 7 creates an air supply chamber a for a group of 16 air outlets formed on one inclined wall surface 13a, and a chamber for a group of 16 air outlets formed on the other inclined wall surface 13a. By dividing the combustion air into two chambers, even if the entire combustion air passes through the punching plate 7 in a direction inclined in the short side direction with respect to the punching plate 7 due to the dynamic pressure of the fan discharge air, the combustion air is divided into two chambers. Combustion air is evenly distributed and supplied to each chamber, thereby equalizing the combustion state in the short side direction and improving combustion performance.

To supply fuel gas to each fuel gas supply pipe 14, a nozzle 18 for blowing fuel gas into the inside of the fuel gas supply pipe 14 is attached to an opening on one end side of the fuel gas supply pipe 14. The opening on the other end side is closed with a blind member 19.

The blow nozzle 18 has a fuel gas supply pipe 1
4. A first jet port 1 that jets fuel gas in the direction of the pipe axis.
8a, and a plurality of second ejection ports 18b that eject fuel gas in the radial direction of the fuel gas supply pipe 14. Mottsu fuel gas supply pipe 1
Although the fuel gas is made to reach the closed end of the pipe 4, due to the influence of the dynamic pressure, the gas jet port 15 on the side closer to the blow nozzle 18 in the pipe axial direction
The inconvenience that the amount of ejection from the gas ejection port 15 is smaller than that from the gas ejection port 15 on the far side is solved.
The fuel gas is ejected and supplied in the radial direction from the second ejection ports 18a, thereby eliminating the fuel gas ejected from the arrayed gas ejection ports 15 in the axial direction of the fuel gas supply pipe 14. The aim is to improve combustion performance by making it more uniform.

Note that the second jet port 18b is connected to the fuel gas supply pipe 14.
Blow nozzle 1 at a pitch of 90° in the circumferential direction of
They are arranged in parallel on the circumferential surface of 8.

In the figure, reference numeral 20 denotes a support member that fixes the blow nozzle 18 in a state where it faces the opening on one end side of the fuel gas supply pipe 14. collides with the inner circumferential surface 20a of the formed nozzle storage hole,
Due to the collision, the jetting dynamic pressure from the second jetting port 18b becomes static pressure.

Further, the support member 20 also serves as a closing member for the opening of the fuel gas supply pipe 14 on the side where the blowing nozzle is attached. Note that a rubber gasket (not shown) is interposed between the outer circumferential surface of the open end of the fuel gas supply pipe 14 and the support member 20.

Regarding the parts assembly structure of the burner 2, the fuel gas supply pipe 1 is attached to the first burner casing forming wall 21 located on one end side in the extending direction (longitudinal direction) of the partition plate 13 in the burner casing 6.
4 into the burner casing 6 from the outside to the inside, and the second burner casing forming wall 23 located on the other end side in the extending direction of the partition plate 13 is provided with the assembly hole 22 for inserting the A through hole 24 is formed to allow the blind end of the fuel gas supply pipe 14 inserted through the hole 22 to protrude outside the burner casing 6, and on the other hand, the end of the fuel gas supply pipe 14 on the side connected to the blow nozzle 18 is provided with a through hole 24. A stopper 25 is attached that defines the insertion depth of the fuel gas supply pipe 14 into the assembly hole 22 by contacting the outer surface of the first burner casing forming wall 21.

In addition, the wind regulating punching plate 7 stretched over the opening on the hopper type wind outlet side is aligned with the burner 2 in the axial direction of the cylinder.
A first receiving fitting 27 equipped with a pair of first spring tongues 26 biased toward the side is disposed on the inner surface side of the first burner casing forming wall 21, and a pair of similar first spring tongues 26 are disposed on the inner side of the first burner casing forming wall 21. and a second spring tongue piece 28 that urges the partition plate 13 toward the first burner casing forming wall 21 in the longitudinal direction. They are each attached to the burner casing 6 by connecting with screws 30.

Then, as an assembly procedure, the wind regulating punching plate 7 is housed in the burner casing 6 and received by the first spring tongue piece 26 of each of the first and second receiving fittings 27 and 29, and then the partition plate 13 are installed on the air conditioning punching plate 7 while being sandwiched between the second spring tongue piece 28, the first burner casing forming wall 21, and the second spring tongue piece 28.

Next, while pushing the partition plate 13 and the punching plate 7 for air conditioning into the back side of the burner casing 6 (that is, toward the hopper type wind guide 6A side in the cylinder axis direction) against the first spring tongue piece 26, Hole 2
2, each of the fuel gas supply pipes 14 has its blind end protruding from the drying hole 24, and
The stopper 25 is the first burner casing forming wall 2
The fuel gas supply pipes 14 are inserted into the recesses of the U-shaped cross-sectional portions 13a of the partition plates 13, respectively, to a depth where they come into contact with the outer surfaces of the partition plates 13.

In the above-mentioned assembled state, both ends have holes 2.
Fuel gas supply pipe 1 penetrating through 2 and 24
4 and the biasing action of the first spring tongue piece 26, the wind regulating punching plate 7 and the partition plate 13 are held and fixed in the cylinder axis direction, and the partition plate 13 is connected to the first burner casing forming wall. The partition plate is held and fixed in the extending direction (long side direction) by the receiving action of the inner surface of the partition plate 21 and the biasing action of the second spring tongue piece 28.

Further, the stopper 25 is brought into contact with the outer surface of the first burner casing forming wall 21, and the partition plate 1 is brought into contact with the inner surface of the first burner casing forming wall 21.
Due to the contact of the three end surfaces, both the fuel gas supply pipe 14 and the partition plate 13 are aligned in the partition plate extension direction (long side direction) with the first burner casing forming wall 21 as a reference.
Therefore, the gas jet ports 15 arranged in parallel on the fuel gas supply pipe 14 and the air jet ports 16 arranged in parallel on the partition plate 13 are arranged relative to each other in a predetermined staggered phase with extremely high precision.

In the figure, reference numeral 31 denotes a locking tongue piece integrally formed with the stopper 25, and the locking tongue piece 31 is a locking tongue piece formed on the first burner casing forming wall 21 when the fuel gas supply pipe 14 is inserted into the assembly hole 22. The locking tongue pieces 31 are engaged with the locking holes 32, and the engagement between the locking tongues 31 and the locking holes 32 defines the assembly phase of the fuel gas supply pipe 14 in the circumferential direction.

Further, a support member 20 for the blowing nozzle 18 is provided.
is also used as a retaining member for the fuel gas supply pipe 14, and by connecting the support member 20 to the burner casing 6 with screws, the support member 20
The fuel gas supply pipe 14 is prevented from coming off by contact with the open end of the fuel gas supply pipe 14.

[Another example]

Next, another embodiment of the present invention will be described.

The specific shape and structure of the stopper 25, which defines the insertion depth of the fuel gas supply pipe 14 by contact with the outer surface of the burner casing forming wall 21, and the structure attached to the fuel gas supply pipe 14 can be improved in various ways. .

Further, the specific shape of the spring 28 that biases the partition plate 13 toward the inner surface of the burner casing forming wall 21 located at one end in the extending direction, and
Various improvements can be made to the structure attached to the burner casing 6.

The burner parts assembly structure according to the present invention can be applied to burners for various uses in addition to burners installed in water heaters.

[Brief explanation of the drawing]

1 to 7 show embodiments of the present invention,
FIG. 1 is a cross-sectional view of the burner, FIG. 2 is a vertical cross-sectional view of the burner, FIG. 3 is a cross-sectional view taken along the - line in FIG. 2, and FIG. 4 is a cross-sectional view taken along the - line in FIG. FIG. 5 is an exploded perspective view, FIG. 6 is a side sectional view of the water heater, and FIG. 7 is a front sectional view of the water heater. 13... Partition plate, 13c... Inclined wall surface, 14... Fuel gas supply pipe, 15... Gas outlet, 16... Air outlet, 21... Burner casing forming wall, 22... Hole,
25...stopper, 28...spring, a...air supply chamber.

Claims (1)

[Scope of utility model registration request] A partition plate 13 having a substantially U-shaped cross section is provided to partition the combustion section and the air supply chamber a, and the fuel gas supply pipe 14 is inserted into the recess of the partition plate 13 in a posture along the extending direction of the partition plate 13. The fuel gas supply pipe 14 is provided with a group of 15 rows of gas ejection ports each of which ejects fuel gas toward the inclined wall surfaces 13c on both sides of the partition plate 13, and the gas ejection ports 15
Groups of 16 rows of air jets for jetting combustion air toward the groups are arranged on each of the inclined wall surfaces 13c, and the gas jets 15 and the air jets 16 are arranged alternately in the extending direction of the partition plate 13. In the burner formed so that the partition plate 1
A stopper 25 is formed to form a hole 22 for insertion into the recess of No. 3, and the stopper 25 defines the insertion depth of the fuel gas supply pipe 14 into the hole 22 by contacting the outer surface of the burner casing forming wall 21. The partition plate 13 is held in the extending direction by cooperation with the inner surface of the burner casing forming wall 21 and a spring 28 attached to the supply pipe 14 and urging the partition plate 13 toward the inner surface. Part assembly structure of a burner.