JPS6215625Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a forced air gas combustion device in which air necessary for combustion is forcibly supplied by a blower.

As shown in Fig. 1, an outer cylinder D surrounds a combustion cylinder B with a burner group A disposed below with a gap C, and a blower E is provided above to cause combustion in the burner group A through the gap C. A gas combustion apparatus in which a pressure equalizing plate F is provided in the gap C in which air is forcibly supplied is known from Utility Model Application No. 131445/1983. According to this, combustion air is forcibly supplied to the burner group A by the blower E, making it possible to perform high-input combustion, and the pressure equalizing plate F supplies even combustion air to each burner. . However, since the pressure equalizing plate F is provided in the gap C serving as the air passage, the amount of air blown by the air blower E is reduced, and the burner input must be reduced accordingly.

Therefore, this idea proposes a forced air gas combustion device that can supply even combustion air to each burner in the burner group without installing the above-mentioned pressure equalizing plate F in the gap C that would limit the air volume of the blower. to do,
A detailed explanation will be given below with reference to the drawings. Reference numeral 1 denotes a forced air gas combustor of the present invention, which is an example of a gas water heater, and a number of burners 3 are arranged below a combustion tube 2. Reference numeral 4 designates nozzles of the large number of burners 3, which are provided in a manifold 5 and form a nozzle row. Reference numeral 6 denotes an outer cylinder which surrounds the combustion cylinder 2 with a gap 7 in between.

An air supply port 21 is provided at the bottom of the combustion tube 2 and is opened so that the entire length of the nozzle row faces the gap 7.

Reference numeral 8 denotes a blower provided above, which forcibly supplies combustion air to the large number of burners 3 through the gap 7.

9 is provided with an inclined part 92 that descends from the neck part 91 at the center in the longitudinal direction on both sides, and also has a ventilation part 93 formed by extending from the neck part 91 to the inclined parts 92 on both sides and partially cut out in the width direction. This is a flow divider plate equipped with

The flow dividing plate 9 is provided in the gap 7 in front of the air supply port 21 with its longitudinal direction extending in the direction of the frontage of the air supply port 21 and with its neck portion 91 facing upward.

10 is a heat exchanger, 11 is a water supply (hot water) pipe, 12 is an exhaust port, and 13 is a secondary air port.

The proposed gas combustion device is as described above.
When the blower 8 is rotated, combustion air is supplied from above through the gap 7 between the combustion cylinder 2 and the outer cylinder 6.
In this case, in the gap 7, the amount of air supplied is likely to be large in the center of the nozzle row consisting of the nozzles 4 of a large number of burners 3, and small on both sides, but in the gap in front of the air supply port 21. 7 is provided with a flow divider plate 9, so part of the large amount of air in the center is supplied to the center of the nozzle row by the ventilation part 93, but the rest is distributed to both sides of the nozzle row by the inclined part 92. Approximately uniform air is supplied over the entire length of the nozzle row in the longitudinal direction, resulting in good combustion in all burners.

As described above, according to the present invention, there is provided an inclined part 92 that descends from the nape 91 at the center in the longitudinal direction to both sides, and further extends from the nape 91 to the inclined parts 92 on both sides, and has a part cut out in the width direction. Ventilation section 9 formed
3, the longitudinal direction of which is connected to the air supply port 2.
1, and is provided in the gap 7 in front of the air supply port 21 with the neck portion 91 facing upward, so that air is almost uniformly supplied over the entire length of the nozzle row facing from the air supply port 21. Good combustion of the burner can be obtained. Since the flow dividing plate 9 is not provided upstream of the air supply port 21 in the gap 7, but is provided in the gap 7 in front of the air supply port 21, the combustion air from the blower 8 does not decrease on the way, and the burner input is also reduced. It can provide high input and eliminate the drawbacks of the conventional method.

[Brief explanation of the drawing]

FIG. 1 is a cutaway front view of a conventional device, FIG. 2 is a cutaway front view of the present invention, FIG. 3 is an internal perspective view, and FIG. 4 is an enlarged perspective view of main parts. DESCRIPTION OF SYMBOLS 1...Forced air gas combustion device, 2...Combustion tube, 3...Burner, 4...Nozzle, 5...Manifold, 6...Outer cylinder, 7...Gap, 8...Blower, 9... ...Broadcast plate, 10...Heat exchanger, 11...
Water supply (hot water) pipe, 12...exhaust port, 13...secondary air port, 21...air supply port, 91...neck section, 92...
Inclined part, 93...ventilation part.

Claims (1)

[Scope of utility model registration request] In a forced air gas combustion device, an outer cylinder surrounds a combustion cylinder in which a large number of burners are arranged below, with a gap therebetween, and combustion air is supplied to the large number of burners from an upper blower through the gap. An air supply port is provided in the lower part of the combustion cylinder so that the entire length of the nozzle row consisting of the nozzles of the plurality of burners faces the gap, and the combustion cylinder is provided with an inclined part that descends from a longitudinally central neck part to both sides, A flow divider plate having a ventilation portion extending from the nape to the inclined portions on both sides and partially cut out in the width direction is installed in front of the air supply port so that its longitudinal direction extends in the direction of the frontage of the air supply port. A forced air gas combustion device characterized in that the gap is provided with the neck portion facing upward.