JP2000266317A - Combustion equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress metal sounds such as squeak sound, rubbing sound or the like, when a combustion is started or a fire is extinguished by coating between a plurality of metal plates of a connecting portion with an inorganic adhesive, in combustion equipment in which the metal plates superposed near a burner port of a burner body are connected by the connecting portion. SOLUTION: A support plate 23 and a case body 29a of a combustion case are connected by using a screw (clamper) 39 near a burner port of a burner body. The plate 23 is bent at a connecting portion 40 and connected by using a screw 39 in a state of being disposed at an inside of the body 29a. A portion between body 29a and the plate 23 at the portion 40 is coated with an adhesive 41. Thus, a large temperature difference tends not to be generated between the metal plates, an expansion or a contraction between the metal plates is suppressed, and metal sounds such as squeak sound, rubbing sound or the like generated when the combustion of the combustion equipment is started or a fire is extinguished is suppressed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combustion device used for a hot air heater such as a gas fan heater or an oil fan heater.

[0002]

2. Description of the Related Art Generally, a metal combustion box having a combustion chamber connected to a flame hole of a burner body and a metal support plate supporting the burner body are stopped near the flame hole of the burner body. 2. Description of the Related Art Combustion devices joined by using a tool are known.

[0003]

In this type of combustion apparatus, the material constituting the apparatus repeatedly expands and contracts due to heat of combustion. In particular, in the joint portion of the plate material near the flame hole, for example, even when the metal plate located on the high temperature side is exposed to heat of about 500 ° C., the metal plate located on the low temperature side is heated to about 300 ° C.
Only about a degree of heat, and there is a thermal effect of a temperature difference of about 200 ° C. between the two, so there is no heat between the metal plate located on the high temperature side and the metal plate located on the low temperature side. A large difference occurs in the amount of expansion.

[0004] Such a difference in the amount of thermal expansion is remarkable when the operation of the combustion device is started or stopped, and particularly, a large difference in the amount of thermal expansion between the metal plates at the joint near the flame hole is caused by the metal plate. Until the thermal stress between the two is balanced, the distortion is accompanied by a high-pitched squeaking noise and rubbing noise, which makes the user uncomfortable or uncomfortable at the start of combustion or at the time of fire extinguishing. There is.

Accordingly, an object of the present invention is to solve the above-mentioned problems of the conventional combustion device and to suppress the generation of metallic noise such as squeaking noise and rubbing noise generated when the combustion device starts burning or extinguishes a fire. It is an object of the present invention to provide a combustion device that can perform the combustion.

[0006]

According to the first aspect of the present invention,
A plurality of metal plates stacked near the flame hole of the burner main body are joined together, for example, with a joint such as a fastener such as a biscuit, and a combustion box body having a combustion chamber by a combination of such metal plates. A combustion device in which an inorganic adhesive is applied between metal plates at the joint portion.

According to a second aspect of the present invention, a metal combustion box having a combustion chamber connected to a flame hole of a burner main body and a metal support plate supporting the burner main body are provided near the flame hole. A combustion device joined via a stopper, wherein an inorganic adhesive is applied between the combustion box and the support plate at the joint.

According to a third aspect of the present invention, a plurality of metal plates overlapped in the vicinity of the flame hole of the burner main body are joined together with a joint such as a fastener such as a screw, thereby forming the burner main body. A metal combustion box having a combustion chamber connected to the flame hole is formed, and the combustion box and a metal support plate supporting the burner body are joined to each other near the flame hole. In a combustion device, an inorganic adhesive is applied over at least the entire surface between metal plates forming a combustion chamber.

According to a fourth aspect of the present invention, a plurality of metal plates overlapped in the vicinity of the flame hole of the burner main body are joined together with a joint such as a fastener such as a screw, thereby forming the burner main body. In a combustion apparatus in which a combustion box body having a combustion chamber connected to the flame hole is formed, and the combustion box and a metal support plate supporting the burner body are joined to each other near the flame hole. At least, the metal plate constituting the combustion box is a stainless steel plate, and the combustion device has a solvent type inorganic adhesive applied between the metal plates at the joints.

In the present invention, since the inorganic adhesive is applied between the metal plates at the joint, a large temperature difference occurs between the metal plates on the high-temperature side and the low-temperature side, and the amount of expansion between the respective metal plates,
Even if there is a difference in the amount of shrinkage, the inorganic adhesive interposed between the metal plates will not make direct contact between the metal plates, so the squeaking noise and rubbing noise generated when the combustion device starts burning or extinguishes the fire. , Etc., is suppressed.

Further, in the present invention, an inorganic adhesive is applied between the combustion box and the support plate at the joint portion, and a gap which tends to be formed between the metal plates constituting the combustion chamber is sealed with the inorganic adhesive. Therefore, it is possible to suppress a situation in which the combustion gas and the unburned gas leak from the metal box forming the combustion chamber, and to perform stable combustion.

[0012]

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

FIG. 1 shows a hot air heater to which a combustion device according to the present invention is applied. The warm air heater 1 has a partition plate 5 inside the outer case 3, and is provided with a combustion device 7 and a blower 9 inside the partition plate 5. An air inlet 11 is formed on the back of the outer case 3, and a warm air outlet 13 is formed on the lower front.

During operation of the hot air heater 1, the air inlet 1
After the air sucked in from the combustion device 7 becomes primary air and secondary air in the combustion device 7 and is mixed with fuel and burned, the ventilation passage 15
And a part of the air is blown out from the hot air outlet 13 through the blower 9, and a part of the air passes through the ventilation path 17 between the exterior case 3 and the partition plate 5 to cool the exterior case 3 and then the ventilation path 1.
The air is blown from the hot air outlet 13 through the blower 5 and the blower 9.

The combustion device 7 has a length of about 200 mm,
with a width of about mm and a height of about 150 mm,
As shown in FIGS. 2 and 3, a burner main body 21 composed of a Bunsen burner formed by joining two metal plates is provided. On the upper side of the burner main body 21, a flame hole plate 22 is fixed with a fastener such as a screw. A primary flame hole 25 is formed. In addition, the combustion device 7 includes a metal combustion box 29 having a combustion chamber 27 connected to the flame hole 25 of the burner main body 21, and a metal support plate 23 supporting the burner main body 21. Burning box 2
9 is provided with a rectifying plate 31 at the center thereof.
Is formed with an intermediate flame hole portion 33 which is opened in a horizontally long rectangular shape. The intermediate flame hole 33 is located between the flame hole 25 and the secondary flame hole 35 at the upper end of the combustion chamber 29, and has a width smaller than the width of the flame hole 25.

As shown in FIG. 3, the fuel injected from the nozzle 36 to the burner main body 21 sucks the surrounding air as primary air and, as shown in FIG. 2, becomes substantially uniform with the primary air for combustion. The mixture is jetted from each slit-shaped flame hole 24 of the flame hole plate 22 and passes through the secondary air hole 38 to form the combustion chamber 27.
Is mixed with the secondary air introduced into the tank.

For example, when strong combustion is performed at about 3000 kcal / h, primary combustion is performed in the combustion chamber 27 and the flame hole 2
5 and the intermediate flame hole 33, a large combustion flame is formed, and secondary combustion using the air around the combustion chamber 29 as secondary air is performed in the secondary flame hole 35 to completely remove unburned residual gas components. Burn. In this case, if the combustion chamber 27 is extended upward, the combustion flame is formed longer vertically, and the temperature of the combustion flame is reduced by that much, so that the generation amount of NOx is suppressed.

For example, in the case of weakly burning at about 550 kcal / h, combustion is performed in a state where a small weakly burning flame is formed on the flame hole 25. In this case, the rectifying plate 31 is located above the flame hole plate 22, and the rectifying plate 31 suppresses the excessive inflow of the secondary air, so that the generation amount of NOx is also suppressed.

In this embodiment, the support plate 23 and the combustion chamber 2
The nine box bodies 29 a are joined to each other using screws (stops) 39 near the flame hole 25 of the burner main body 21.

At the joint 40, as shown in FIG.
The support plate 23 is bent and joined using screws 39 in a state of being positioned inside the combustion box body 29a. In this joint 40, the support plate 23 is located on the high temperature side, and when this support plate 23 is exposed to heat of about 500 ° C., the joint 40
The combustion box body 29a located on the low temperature side receives only heat of about 300 ° C., and therefore, between the two, about 200 ° C.
Due to the heat having a temperature difference of about ° C., a large difference occurs between the amounts of thermal expansion of the support plate 23 and the combustion box 29a at the joint 40.

Such a large difference in the amount of thermal expansion causes the stress to concentrate on the joining portion 40 of the metal plate, and when the joining force is weak, a rubbing sound as a displacement of the portion, the joining force of the joining portion 40 at the portion. When it is strong, the stress is propagated to other parts, resulting in rubbing noise and squeaking noise in other parts.In particular, box type using relatively thin metal plate like this type of combustion device In a combustion device with a structure, each time the combustion device is ignited or extinguished, until the temperature of the metal plate stabilizes, the noise is high and the volume of the sound is amplified in the box. It gives a feeling.

In this embodiment, an inorganic adhesive 41 is applied between the combustion box 29a and the support plate 23 at the joint 40. For example, the support plate 23 is formed of a 0.5 mm-thick stainless steel plate (for example, SUS-430), and the combustion box 29a is formed of a 0.6 mm-thick heat-resistant stainless steel plate (for example, SUH-21). In this case, for example, water glass or Aron ceramic is used for the inorganic adhesive 41.

Since such an inorganic adhesive 41 is applied to the joint portion 40, as described above, a large temperature difference is generated between the metal plates on the high temperature side and the low temperature side, and the Even if there is a difference between the expansion amount and the contraction amount, the metal plates do not come into direct contact with each other due to the presence of the inorganic adhesive 41 between the metal plates. Generation of metallic sounds such as squeaking noise and rubbing noise is suppressed.

The inorganic adhesive may be water glass or Aron ceramic as described above. For example, a heat-resistant paint such as a heat-resistant paint manufactured by Okitsumo Co., Ltd., or an inorganic solvent-type adhesive having good compatibility with stainless steel plates. It is more preferable if there is.

The above configuration is not limited to the joint 40 between the support plate 23 and the combustion box 29a. The squeaking sound and the rubbing sound generated from the combustion device 7 described above are
Elevation of the metal plate portion that directly comes into contact with the flame generated in the burner portion, such as the other joint portion 42 of the combustion box that forms the combustion chamber and the joint portion 43 between the burner body and the support plate, and that directly receives heat rays from the flame. This is caused by heat distortion until the temperature and the temperature of the metal plate portion that gradually rises in temperature due to the heat from the heated metal plate are obtained, and a combustion device made of a thin metal plate was used. The present invention can be applied to all joints. When the combustion chamber or the combustion box is formed of a thin metal plate, the joints 40, 42, and 43 between the metal plates may be formed into a shape having sufficient flatness to maintain gas tightness. Although it is difficult, and the joints 40, 42, and 43 are apt to lose airtightness due to thermal strain, in the structure in which the inorganic adhesive is applied to the joint 40 as in the present invention, the inorganic adhesive Due to the sealing effect of the agent,
Such a problem can be solved and stable combustion can be obtained.

Further, the above description has been made in accordance with the embodiment of the gas combustion device of the gas fan heater. However, such a problem also occurs in the oil fan heater and the FF type oil hot air heater. By applying an inorganic adhesive between the metal plates at the joints of the metal plates constituting the combustion chamber as in the case of gas, it is possible to suppress the generation of metal noise such as squeaking noise and rubbing noise, and to join metal plates. It is an object of the present invention to provide a stable burning petroleum combustion device that prevents a decrease in airtightness of a part and has a high sealing effect.

[0027]

As is apparent from the above description, according to the present invention, since the inorganic adhesive is applied between the plurality of metal plates at the joint, the combustion chamber is formed when the conventional combustion apparatus is ignited or extinguished. Even if a sharp temperature difference occurs between the constituent metal plates and a large difference in the amount of thermal expansion and contraction occurs between the metal plates, the metal plates do not directly touch each other, Since the temperatures of the respective metal plates constituting the device are quickly balanced, it is possible to effectively suppress the generation of metal sounds such as squeaking noise and rubbing noise generated when the combustion device starts burning or extinguishes the fire.

Further, since the inorganic adhesive of the present invention can be applied relatively easily to all the joints of the combustion apparatus, the sealing effect of the joints can be maintained, and a stable combustion combustion apparatus can be provided. is there.

[Brief description of the drawings]

FIG. 1 is a sectional view of a hot air heater.

FIG. 2 is a sectional view showing one embodiment of a combustion device according to the present invention.

FIG. 3 is a front view of the same.

FIG. 4 is a sectional view of a joint.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hot air heater 3 Exterior case 7 Combustion device 9 Blower 21 Burner main body 22 Flame plate 23 Support plate 25 Flame hole 27 Combustion chamber 29 Combustion box body 29a Combustion box body 39 Screw (stopper) 40, 42, 43 Joining Part 41 Inorganic adhesive

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Takeshi Kashiwase 2-5-5 Keihanhondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (72) Inventor Yoshiaki Kaneko 2-chome, Keihanhondori, Moriguchi-shi, Osaka No.5-5 Sanyo Electric Co., Ltd. F term (reference) 3K017 AA06 AA08 AB02 AB05 AB11 AC01 AD08 AF03 3K052 AA03 AA06 AB06 AB08 AB09 AC05 DA03 DA09

Claims (4)

[Claims] A plurality of metal plates superimposed near a flame hole of a burner main body are joined together with a joint by a fastener such as a screw, and a combustion chamber having a combustion chamber is formed by combining such metal plates. In a combustion device in which a box is formed,
A combustion device, wherein an inorganic adhesive is applied between metal plates at the joint. 2. A metal combustion box having a combustion chamber connected to a flame hole of a burner main body and a metal support plate supporting the burner main body are joined via a stopper near the flame hole. The combustion device according to claim 1, wherein an inorganic adhesive is applied between the combustion box and the support plate at the joint. 3. A plurality of metal plates superposed in the vicinity of the flame hole of the burner main body are joined together with a joint, for example, with a fastener such as a screw, so that the combustion connected to the flame hole of the burner main body. In a combustion apparatus in which a metal combustion box having a chamber is formed, and the combustion box and a metal support plate supporting the burner main body are joined to each other near the flame hole, A combustion apparatus characterized in that an inorganic adhesive is applied over the entire surface between metal plates forming a chamber. 4. A plurality of metal plates superimposed near the flame hole of the burner main body are joined together with a joint, for example, with a fastener such as a biscuit, so that the combustion connected to the flame hole of the burner main body. In a combustion device in which a combustion box having a chamber is formed, and the combustion box and a metal support plate supporting the burner body are joined to each other near the flame hole, at least the combustion box is A combustion apparatus characterized in that the constituent metal plates are stainless steel plates, and a solvent-type inorganic adhesive is applied between the metal plates at the joints.