JPH0148441B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a forced air gas instantaneous water heater.

Conventionally, as this type of water heater, for example,
60046 or Utility Model Application Publication No. 56-60047, a frame equipped with a heat exchanger on the upper part, a burner group consisting of a plurality of approximately T-shaped unit burners on the lower part, and a gas manifold on the lower side. A ventilation chamber is provided on the lower side of the casing and is separated from this through a partition plate to send the air to the blower. Types in which the airflow is divided into a primary airflow guided to the side and a secondary airflow guided to the secondary side of the burner group are known, but
In this case, it is preferable that the secondary air flow is guided to the secondary side of the burner group as evenly as possible over substantially the entire surface thereof, and also to the outside thereof to perform an air cooling effect. .

The purpose of the present invention is to obtain a gas water heater that meets such requirements, and includes a heat exchanger in the upper part and a plurality of approximately T-shaped unit burners in the lower part arranged in parallel in the front and rear. A blower chamber connected to the blower is provided on the lower side of the frame case, which is equipped with a burner group consisting of a group of burners and a gas manifold below the frame case, and is separated from the inside of the frame case via a partition plate. A method in which air guided to the partition plate is divided into a primary air flow guided to the primary side of the burner group and a secondary air flow guided to the secondary side of the burner group, using distribution holes formed in the partition plate. A second partition plate is provided in the frame housing above the partition plate, and a distribution hole formed in the second partition plate,
The secondary airflow on each side is divided into a first airflow that is guided to approximately the center of the burner group, a second airflow that is guided near the outer end of the burner group, and a second airflow that is guided to the outside of the burner group. The airflow is divided into three airflows.

An example of implementing the present invention will be explained with reference to the attached drawings.

In the drawings, reference numeral 1 indicates a frame casing on the outer periphery, and a heat exchanger 2 is installed in the upper part of the frame casing 1, and approximately T is installed in the lower part of the frame casing 1.
A burner group 4 consisting of a plurality of unit burners 3 arranged in front and rear, and a gas manifold 5 facing the burner group 4 below the burner group 4, and a gas manifold 5 facing the burner group 4 below the burner group 4. A ventilation chamber 8 connected to a blower 7 is provided, separated from this through a partition plate 6, and furthermore, the partition plate 6 has a plurality of primary distribution holes 9 in the center and two holes on both sides thereof. a plurality of secondary distribution holes 10 are arranged;
In this way, the air in the ventilation chamber 8 is introduced into the primary air flows A, A, which are guided to the primary side of the burner group 4 through the primary distribution hole 9, and into the secondary air flow A, A, which is guided to the primary side of the burner group 4 through the secondary distribution hole 10. The air is distributed to secondary airflows B and B on both sides, which are led to the next side.

The unit burner 3 is clearly shown in FIG. 4, for example, and consists of a mixing pipe section 3a extending in the vertical direction, and a combustion section 3b extending in the horizontal direction at the top of the mixing pipe section 3a, with a pair of left and right flanges 3c on both sides. The burner group 4 is of a type in which a through hole 3d is provided, and the burner group 4 is provided with a through hole 3d as shown in FIG.
are arranged in parallel in a plurality of front and rear stages with an appropriate interval 3e between them.

Although the above is not significantly different from the above-mentioned known one, according to the present invention, a second partition plate 11 is provided in the frame casing 1 and located above the partition plate 6. A first distribution hole 12 in the center and second distribution holes on both sides thereof.
A plurality of distribution holes 13 and a plurality of third distribution holes 14 on both sides thereof are arranged, so that the above-mentioned secondary air flow B on each side flows through the first distribution holes 12 and the third distribution holes 14 on the inside thereof. The first air flow C is guided to the upper side of each burner 3 through the interval 3e, that is, to the approximate center of the burner group 4; a second air flow D guided to the upper side of the burner group 4, that is, near the outer end of the burner group 4;
Furthermore, the upper side of the burner group 4, that is, the outside of the burner group 4, is distributed through the third distribution hole 14 into a third air flow E that is guided upward.

In this way, according to the present invention, the secondary airflows on each side guided from the ventilation chamber to the upper side thereof are divided into a first airflow on the innermost side on the upper side, a second airflow on the outside thereof, and a second airflow on the outside thereof. The secondary air is distributed and guided into three air streams, and the burner group is guided almost uniformly over the entire surface of the burner group by the first and second air streams to improve combustion. It is possible to prevent the frame casing on the outer periphery from overheating by being air-cooled by the third air flow, and furthermore, it is sufficient to have a second partition plate above the lower partition plate facing the lower partition plate. It has advantages such as being simple and relatively inexpensive.

[Brief explanation of drawings]

Figure 1 is a cutaway front view of one example of the water heater of the present invention, Figure 2 is a slope view from below, Figure 3 is a slope view from above, and Figure 4 is a slope view of a unit burner. be. 1... Frame casing, 2... Heat exchanger, 3... Unit burner, 4... Burner group, 5... Gas manifold, 6
...District board, 7...Blower, 8...Blower room, 9...
...Primary distribution hole, 10...Secondary distribution hole, A...Primary air flow, B...Secondary air flow, 11...Gas partition plate, 12...First distribution hole, 13...Second distribution hole,
14... Third distribution hole, C... First air flow, D...
Second air flow, E...Third air flow.

Claims (1)

[Claims] 1. A burner group consisting of a heat exchanger in the upper part and a plurality of approximately T-shaped unit burners arranged in parallel in the front and back in the lower part;
A ventilation chamber connected to a blower is provided on the lower side of the frame housing, which is equipped with a gas manifold on the lower side of the frame housing, and is separated from the inside of the frame housing via a partition plate, and the air guided into the ventilation chamber is separated from the inside of the frame housing through a partition plate. In the type of distribution hole formed in the partition plate, the frame is divided into a primary air flow guided to the primary side of the burner group and a secondary air flow guided to the secondary side of the burner group. A second partition plate is provided in the housing, located above the partition plate, and distribution holes formed in the second partition plate direct the secondary airflow on each side to approximately the center of the burner group. A gas water heater configured to divide the air flow into a first air flow guided to the outer end of the burner group, a second air flow guided near the outer end of the burner group, and a third air flow guided to the outside of the burner group. .