JPS6229794Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an instantaneous water heater that performs high-load combustion. Conventionally, as shown in Fig. 1, a heat absorber a is arranged in the upper part and a number of burners b are arranged in the lower part, and the lower half of the heating cylinder d, which has a combustion chamber c inside, is hermetically surrounded by an outer cylinder e. An air supply passage f is formed between the outer shell e and the heating shell d, and the combustion chamber c and the air supply passage f are communicated with each other at the lower end of the heating shell, so that the two groups of burners are provided with combustion air. Types in which air is forcibly supplied through an air supply passage f are known.

However, in this case, the opening g of the throat part of the burner b is located at a position away from the bottom plate of the outer shell e, so the static pressure at the opening g is not sufficient, and therefore the gap between the opening g and the burner port h is According to this, the pressure difference between the two gases is small, and therefore, sufficient primary air cannot be supplied to the opening g, and an insufficient amount of primary air can be obtained for the fuel. This is accompanied by the disadvantage that so-called high-load combustion, which increases the amount of combustion in one burner b by increasing the amount of combustion, is difficult to perform satisfactorily.

The purpose of the present invention is to obtain an instantaneous water heater that does not have such inconveniences.
The lower half of a heating cylinder 4 with a large number of burners 2 arranged in its lower part and a combustion chamber 3 inside is surrounded by an outer cylinder 5 in a sealed state, and between the outer cylinder 5 and the heating cylinder 4. An air supply passage 6 is formed in the combustion chamber 3, and the combustion chamber 3 and the air supply passage 6 are communicated with each other at the lower end of the heating cylinder, and combustion air is forcibly supplied to the burner 2 group through the air supply passage 6. In the type, a gas supply pipe 9 provided with a gas nozzle portion 8 corresponding to the gas supply port 7 of each burner 2 is placed along the outside of the lower part of the outer shell 5, and the gas nozzle portion 8 is connected to the outer shell 5. The air blower 10 faces the inside of the outer shell 5 through a through hole 5b provided in the bottom plate 5a.

Thus, when blowing air through the air passage 6 with the blower 10, the bottom plate 5a of the outer shell 5 and the gas supply port 7 provided between the throat portion 2a of the burner 2 can be brought as close as possible. As a result, the air pressure in the area where the supply port 7 is present is increased to increase the pressure difference between the burner 2 and the burner port 11, thereby increasing the amount of primary air from the supply port 7. According to this, high-load combustion can be performed by increasing the amount of gas supplied to each burner 2, and the flame can be made as short as possible.

In the illustrated example, the bottoms 5a on both sides of the outer shell 5 in the direction in which the burners 2 are arranged are formed into a boat-shaped cross section, and the air from the air supply path 6 is transferred to the gas through the bottoms 5c on both sides. The amount of primary air from the gas supply port 7 is further increased toward the central portion where the supply port 7 is provided.

In this way, according to the present invention, the gas supply pipe 9 provided with the gas nozzle part 8 corresponding to the gas supply port 7 of each burner 2 is placed along the outer side of the lower part of the outer shell 5, and the gas nozzle part 8 is placed outside the outer shell 5. Bottom plate 5a of body 5
By facing the inside of the outer shell 5 through the through-hole 5b provided in the hole 5b, the amount of primary air supplied to the gas burner 2 through the supply port 7 can be increased, thereby achieving a higher height than before. This has the effect of providing an instantaneous water heater equipped with a burner 2 that performs load combustion.

[Brief explanation of the drawing]

FIG. 1 is a cutaway side view of a conventional example, FIG. 2 is a cutaway side view of an example of the present invention, and FIG. 3 is a perspective view of the main parts thereof. 1... Endothermic part, 2... Burner, 3... Combustion chamber,
4... Heating cylinder, 5... Outer shell, 6... Air supply path, 7...
...Gas supply port, 8...Gas nozzle section, 9...Gas supply pipe.

Claims (1)

[Scope of utility model registration request] The lower half of the heating cylinder 4, which has a heat absorbing part 1 in the upper part and a plurality of burners 2 in the lower part and has a combustion chamber 3 inside, is hermetically surrounded by an outer cylinder 5. An air supply path 6 is formed between the cylinder 4 and the combustion chamber 3.
and the air supply passage 6 are communicated at the lower end of the heating cylinder, and the gas supply port of each burner 2 is forcibly supplied with combustion air to the two groups of burners through the air supply passage 6. A gas supply pipe 9 provided with a gas nozzle portion 8 corresponding to 7 is placed along the outside of the lower part of the outer cylinder 5, and the gas nozzle portion 8 is connected to the outer cylinder through a through hole 5b provided in the bottom plate 5a of the outer cylinder 5. An instantaneous water heater that can be viewed from inside 5.