JPH02146406A - Water heater - Google Patents

Abstract

PURPOSE:To improve the burning chamber load to achieve a high load burning by burning the mixture ejected from flame holes in the burning chamber wall with air ejected from slit-like air holes around the burning chamber in addition to the burning in the burning section having air holes and flame holes alternately in a flat part. CONSTITUTION:Part of the air supplied by a feed air fan 11 is introduced from an air inlet 13 as the primary combustion air to a mixture chamber 14 along with the fuel ejected out of a fuel nozzle 12, and part of the mixture is ejected near to the outer surface of the burning chamber 19 from first flame holes 15 and the other is vertically ejected from second flame holes 16. By alternately disposing the first flame holes 15 and the horizontal air holes 18, the mixture ejected from the first flame holes 15 and the air ejected from the slit-like horizontal air holes 18 do not cross each other, and the mixture is continuously enveloped by air to form a vertically continuous flame along the burning chamber wall. By parallelly repeating the second flame holes 16 and the vertical air holes 24, the mixture ejected from the second flame holes 16 is enveloped by air supplied from the vertical air holes 24, avoiding the interference with the adjacent flames.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a water heater.

2. Description of the Related Art As shown in FIG. 3, a conventional water heater of this type has a heat absorbing section 1 in the upper part and a plurality of burners 2 in the lower part under a heating net 4 with a combustion chamber 3 inside. A half part is hermetically surrounded by an outer shell 5 to form an air passage 6 between the outer shell 111ii15 and the heating net 4, and the combustion chamber 3 and the air passage 6 are connected to the lower end of the heating net. The temperature of the outer shell 5 is prevented from increasing by forcibly supplying combustion air to the two groups of burners through the ventilation passage 6. (For example, Utsukai 58-1885
41 Publication) Problems to be Solved by the Invention However, in the above configuration, the air blown to the burner 2 is passed through the air supply path 6 and then the heating net 4
After being used only to cool the outer shell 5, the air passing through the air passage 6 was used for combustion air in the burner 2 arranged in a planar manner, so that the air passing through the air passage 6 was used for high-load combustion in the burner. There was a problem in that effective utilization was not planned for the purpose of the project.

The present invention solves such conventional problems, and the heating net
The purpose is to cool the outer shell and promote high-load combustion in the burner.

Means for Solving the Problems In order to solve the above-mentioned problems, the water heater of the present invention has a part of the flame port that spouts the air-fuel mixture jets out along the wall surface of the combustion chamber, and the remaining flame ports spouts air. Planar parts are arranged alternately with air ports, and slit-shaped air ports that blow air into the combustion chamber from the outer periphery of the combustion chamber are arranged alternately with flame ports that blow air out along the wall surface of the combustion chamber, all the way to the upper heat exchanger. It has a structure consisting of a vertical section arranged in a vertical direction.

Effect of the Invention With the above-described configuration, the present invention cools the combustion chamber wall surface and the outer shell with combustion air, and at the same time, the air-fuel mixture is ejected from the flame port arranged along the combustion chamber wall surface through the slit-shaped air port on the outer periphery of the combustion chamber. As the air is blown out more, it is fired.
By adding this to the combustion amount of the combustion section, which has flame ports arranged alternately with the air ports in the plane part, the load on the combustion chamber is increased, making it possible to achieve high-load combustion.

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

In FIG. 1, 11 is an air supply fan, 12 is a fuel nozzle, and a mixture chamber 14 having an air intake port 13 facing the fuel nozzle 12 has a first flame port 15 which is a mixture outlet.
and a second flame opening 16. The combustion chamber 17 is surrounded by a combustion chamber outer periphery 19 having a slit-shaped horizontal air port 18, and the combustion chamber outer periphery 19 is surrounded by an outer shell 20.

21 is an air supply path, 22 is a heat exchanger, and 23 is a ventilation path.

FIG. 2 is an enlarged view of the main part of the burner section, and there is a vertical air port 24 arranged in parallel with the burner port 16, which communicates with the air supply path 21 via a ventilation path 25.

In the above configuration, a part of the air blown by the air supply fan 11 is used as secondary air for combustion to form the air mixture chamber 14 along with the fuel ejected from the fuel nozzle 12 through the air intake port 13.
A portion is ejected from the first flame port 15 along the outer periphery 19 of the combustion chamber, and the other portion is ejected from the second flame port 16 in the vertical direction. The other part of the air blown by the air supply fan 11 passes through the air passage 21 , part of it is blown vertically from the vertical air port 24 via the ventilation passage 25 , and the other part passes through the air passage 2
1 and is blown in the horizontal direction from the slit-shaped horizontal air port 18.

By arranging the first flame port 15 and the horizontal air port 18 alternately, the mixture ejected from the first flame port 15 and the air blown from the slit-shaped horizontal air port 18 do not intersect and form a mixture. Air continuously wraps around the combustion chamber, and flames are formed continuously in the vertical direction of the combustion chamber wall. Furthermore, by repeatedly arranging the second flame port 16 and the vertical air port 24 in parallel, the mixture ejected from the second flame port 16 is surrounded by the air blown from the vertical air port 24. Interference with neighboring flames can be prevented. By forming the above two types of flames in the combustion chamber, a burner with flame bases on the bottom of the combustion chamber and the walls of the combustion chamber can be created, making more effective use of the combustion chamber compared to conventional burners that use only the bottom of the combustion chamber as flame bases. It is possible to achieve high-load combustion. Also,
Since the secondary air is discharged from the slit-shaped horizontal air port 18, the flame that is formed in the vertical direction of the combustion chamber wall can be made into a continuous flame, reducing the combustion noise. The shell 20 can also be cooled.

Effects of the Invention As described above, the water heater of the present invention provides the following effects.

By combining a burner that uses the combustion chamber wall as an outlet for secondary combustion air and forms a flame along the combustion chamber wall with a conventional slit-type burner configured at the bottom of the combustion chamber, the combustion chamber space is maximized. It can be used to improve the combustion chamber load, and by using a slit-shaped secondary air outlet on the combustion chamber wall, it has the dual effect of cooling the combustion chamber wall and the outer shell, which are the paths for the secondary air.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a water heater according to an embodiment of the present invention, FIG. 2 is an enlarged sectional perspective view of the same essential parts, and FIG. 3 is a sectional view of a conventional water heater. 15...First flame port, 16...Second flame port, 18...Horizontal air port, 22...
Heat exchanger, 24...Vertical air port. Name of agent: Patent attorney Shigetaka Awano Haka 1 figure: X! ! Sakai room chart

Claims (1)

[Claims] A combustion section is provided with a heat exchanger at the top and a burner at the bottom, surrounded by the wall of the combustion chamber, and a part of the burner's flat flame port is arranged near the wall of the combustion chamber to blow the air-fuel mixture. A slit-shaped air port is disposed along the wall surface of the combustion chamber and alternates with the flame port on the outer periphery of the wall surface of the combustion chamber, from a flat part of the burner to a lower part of the upper heat exchanger, and The remaining burner ports on the flat surface of the burner are arranged alternately with air ports in the center of the flat surface of the burner.