JPH09145025A - Gs hot water apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve, in a gas hot water apparatus, inflammability between right, left gas burners arranged in the locations near the inner wall surface of a casing (inner body) and to prevent overheating of the inner wall surface. SOLUTION: In a gas hot water apparatus in which a plurality of gas burners 14R, 14L are arranged at left and right sides respectively in a casing 12, an inflammablility plate 16 for improving inflammability between gas burners is provided at a location between the opposing ends of the gas burners 14R1 , 14L1 disposed near the inner wall surface of the casing 12, and am air baffle 18 is provided in an air passage between the burners 14R1 , 14L1 and the casing 12 to partition the passage thereby to prevent flames of the burners from contacting the inner wall surface of the casing and to prevent overheating of the casing.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas water heater, and more particularly to a gas water heater in which a plurality of gas burners are arranged on the left and right inside a casing (inner barrel).

[0002]

2. Description of the Related Art
In this type of gas water heater, a gas burner is arranged in a casing (inner body), and a heat exchanger having a water supply pipe and a hot water discharge pipe is arranged above the gas burner, and heat is generated by combustion gas of the gas burner. It is well known that tap water is obtained by heating water passing through an exchanger. It is also known that in such a gas water heater, a plurality of gas burners are arranged on the left and right sides inside the casing. In such a gas water heater, the fire is transferred by pressing the secondary air between the left and right arranged burners.

However, if the amount of secondary air is suppressed in this way, the combustion of the burner becomes unstable. Therefore, it is conceivable to install a fire transfer plate so as to straddle both the left and right gas burners to improve the fire transfer property, but then the flame will stick out from both sides of the fire transfer plate, and the protruding flame will cause the inner wall surface of the casing to rise. There was a problem that it was abnormally heated and impaired durability.

The problem to be solved by the present invention is to improve the fire transfer property between a plurality of gas burners arranged on the left and right, and at the same time prevent overheating of the casing to improve its durability. To provide a container.

[0005]

To solve this problem, the present invention relates to a gas water heater in which a plurality of gas burners are arranged on the left and right sides of a casing. A fire transfer plate for the transfer of heat between the two gas burners is installed at the opposite parts of the gas burner, and the fire of both gas burners is prevented from hitting the inner wall surface of the casing in the air flow path between the both gas burners and the casing. The gist of the present invention is to provide an air rectifying plate for partitioning the air flow path for shutting off and preventing overheating of the casing.

With such a structure, the transferability between the left and right gas burners arranged at the extreme end position close to the casing is improved by the provision of the transfer plate, and it also sticks out from the transfer plate. The flames of both gas burners heading toward the casing side are blocked by the air flow on the burner side of the air flow path partitioned by the air rectifying plate, and the air flow on the casing side prevents overheating of the inner wall surface of the casing. . Then, since the transferability of fire is improved without suppressing the amount of secondary air, a healthy combustion state is maintained.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of the present invention will be described in detail below with reference to the drawings. FIG. 1 shows an arrangement state of a gas burner casing (inner case) in a gas water heater according to the present invention. Further, FIG. 2 is a sectional view taken along the line AA. As shown in the figure, in this gas water heater, a gas burner 14R is provided in a rectangular tubular casing (inner case) 12,
A plurality of 14L are arranged on each of the left and right sides.

[0008] Inside the casing 12, a heat exchanger having a water supply pipe and a hot water discharge pipe is provided above the gas burners 14R and 14L arranged in large numbers, as shown in FIG. An exhaust port for the combustion gas of the gas burner is provided in the upper part of the heat exchangers which are arranged. On the other hand, an air supply fan for forcibly supplying secondary air for combustion to these gas burners 14R, 14L is provided below the gas burners 14R, 14L arranged in the casing 12. The configuration is well known.

In this gas water heater, however, the casing 1
2 between the left and right gas burners 14R ₁ and 14L ₁ arranged at the end closest to the inner wall surface, the fire transfer plate 16 is bent so that the outer wall surface of the burner covers the upper portions of both burners. It is provided. The fire transfer plate 16 is designed to have a size slightly larger than the facing interval between the left and right gas burners 14R ₁ and 14L ₁ , and moreover, the flames of both burners are pushed upward from the burner wall surface so as to be pressed by the fire transfer plate 16. It is bent inwardly (toward the burner array side).

A flow path of secondary air forcibly supplied by an air supply fan is provided between the casing 12 and the gas burners 14R, 14L at the end near the casing 12. An air rectifying plate 18 is provided on the burner side and the casing side to partition the air flow path.

According to the gas water heater constructed as described above, the left and right gas burners 14R ₁ , which are arranged at the end portions closest to the inner wall surface of the casing 12 when a large number of arranged gas burners 14R, 14L are ignited, The fire transfer between 14L ₁ is quickly performed by the fire transfer plate 16 disposed therein.

After the transfer of heat between the burners, the flame pushed in by the transfer plates 16 sticks out from both sides of the transfer plates 16 and tries to reach the inner wall surface of the casing 12. The progress is caused by the secondary air flow passing through the burner side air flow path (the air flow path indicated by reference numeral (a) in FIGS. 2 and 4) of the air flow paths between 14R1 and 14L1 and the casing 12. Be blocked.

The casing is formed by the secondary air flow of the air passage on the casing side (the air passage indicated by reference numeral (b) in FIGS. 2 and 4) of the air passages between the burners and the casing 12. The temperature rise of 12 is suppressed. Therefore, even if the amount of secondary air in the casing 12 is not reduced, the transferability is improved by the transfer plate, and the overheating of the inner wall surface of the casing is also avoided by the forcedly supplied secondary air flow between the burner and the casing. Will be done.

In this embodiment, since the fire transfer plate 16 is bent and formed on the burner side in the casing 12, contact with the secondary air of the burner flame increases, which causes red fire. To reduce the flow of air and smooth the air flow. Therefore, in addition to not reducing the secondary air amount, the combustibility is greatly improved.

The present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention. For example, the shape of the fire transfer plate does not necessarily have to be a bent shape, but may be an arc shape. In addition, by changing the ratio of the flow rates of the air flowing through the air flow paths (a) and (b), the air rectifying plate for partitioning the flow path of the secondary air is provided near the burner side or near the casing side. Good.

[0016]

According to the gas water heater of the present invention, the fire transfer property between the left and right gas burners arranged at the extreme end positions near the inner wall surface of the casing (inner shell) is improved without reducing the amount of secondary air. Combustion is stable because of this, and the contact of the burner flame with the casing inner wall surface by installing the fire transfer plate is provided with the air rectification plate in the air flow path between the burner and the casing inner wall surface. By avoiding this, the casing is prevented from overheating and its durability is provided, so the industrial benefit is extremely large.

[Brief description of the drawings]

FIG. 1 is a plan view showing a state in which gas burners of a gas water heater according to an embodiment of the present invention are arranged in a casing (inner case).

2 is a sectional view taken along the line AA in FIG.

3 is an enlarged arrow view of a main part of a cross section taken along the line BB in FIG.

FIG. 4 is an enlarged view of a C portion in FIG.

FIG. 5 is a plan view in the D direction in FIG.

[Explanation of symbols]

 12 Casing 14R, 14L Gas burner 16 Fire transfer plate 18 Air straightening plate

Claims (1)

[Claims] 1. In a gas water heater in which a plurality of gas burners are arranged on the left and right sides in a casing, the heat transfer between the left and right gas burners arranged at the end positions near the inner wall surface of the casing is opposed to each other. A fire transfer plate is provided for the air flow between the gas burners and the casing to block the fire of the gas burners from hitting the inner wall surface of the casing and to prevent the casing from overheating. A gas water heater characterized by being provided with an air rectifying plate for partitioning a passage.