JPS6343643B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates primarily to a household combustor that performs forced combustion using a fan, and more particularly to a burner that performs high-load combustion.

Configuration of the conventional example and its problems The configuration of the conventional example is shown in FIG. 1 is the mixing chamber, 2
is the flame opening, 3 is the secondary air chamber, 4 is the secondary air plate, 5
is the burner frame, 6 is the flame-holding air chamber, 7 is the flame-holding air port,
8 is a secondary air port, and 9 is a combustion chamber. A burner frame 5 consisting of a mixing chamber 1 located in the center and two secondary air chambers 3 located on both sides of the mixing chamber 1 is integrally formed, and on the side of the combustion chamber 9 of the mixing chamber 1,
A flame port part 2 consisting of a large number of flame ports is inserted, and flame holding air chambers 6 for holding the flame are provided on both sides of the flame port part 2, and the secondary air chamber 3 and the flame holding air chamber 6 are provided on both sides of the flame port part 2. A secondary air plate 4 having a secondary air port 8 and a flame holding air port 7 on the combustion chamber side of the flame air chamber 6, respectively.
is installed. With this configuration, the air-fuel mixture ejected from the flame port 2 forms a flame, and the flame-stabilizing air ejected from the flame-stabilizing air port 7 stabilizes the flame.
The secondary air ejected from the secondary air port 8 shortens the flame and becomes a high-load burner, but in order to supply the air-fuel mixture and secondary air from the end face of the burner,
It has disadvantages such as the flame distribution being non-uniform in both the left and right directions and the depth direction, resulting in high noise, and the only way to increase the burner performance is to extend it in the depth direction, and the burners cannot be arranged in series.

Purpose of the invention The present invention solves such conventional problems,
By supplying the air-fuel mixture from upstream of the burner and the secondary air from the end face of the burner, the purpose is to make the air-fuel mixture uniform, reduce noise, and facilitate the formation of burners in series.

Structure of the Invention In order to achieve this object, the present invention integrates a secondary air chamber having respective openings facing the combustion chamber and flame stabilizing air chambers provided on both sides of the secondary air chamber. one or more air supply inner boxes comprising a burner inner frame and a chevron-shaped secondary air plate having a large number of secondary air ports mounted to cover the opening; and a combustion chamber located on both outer sides of the burner. A burner outer frame is integrally formed to form a secondary air chamber with an opening facing each side, and a flame-holding air chamber provided on one side of the secondary air chamber, and a large number of burner frames are attached to cover the openings. An air supply outer box consisting of a semi-mounted secondary air plate having secondary air ports, and a number of flame ports clamped between the air supply inner box and between the air supply inner box and the air supply outer box. By providing a flame port consisting of a flame port, the air-fuel mixture is supplied from upstream of the burner, and the secondary air is supplied from the end face of the burner.

DESCRIPTION OF EMBODIMENTS FIG. 2 is a sectional view of a water heater using a high-load burner according to an embodiment of the present invention, and FIG. 3 is a sectional view of the high-load burner section. I will explain. Note that the same members as in FIG. 1 are given the same numbers. In FIGS. 2 and 3, 3a and 3b are an air supply inner box 11a and an air supply outer box 11b, respectively.
4a and 4b are secondary air plates covering the openings of the inner box 11a and outer box 11b, respectively; 12 is a heat exchanger; 13 is a combustion fan;
4 is a pressure equalization plate, 15 is a mixing pipe, 16 is a combustion nozzle,
17 is a burner end face.

In FIG. 2, the combustion air supplied by the combustion fan 13 is partially mixed with the fuel supplied by the combustion nozzle 16 in the mixing tube 15, and after entering the mixing chamber 1 located upstream of the burner, the combustion air is mixed with the fuel supplied by the combustion nozzle 16. It gushes out from part 2.
The remaining air enters the air supply box from the burner end face 17, is supplied to the flame from the secondary air plates 4a and 4b, undergoes high-load combustion in the combustion chamber 9, and heats water in the heat exchanger 12.

Next, the burner portion, which is the main point of the present invention, will be explained with reference to FIG. A burner inner frame 5a integrally formed from an Al extruded material forming a secondary air chamber 3a having respective openings facing the combustion chamber 9 and flame stabilizing air chambers 6 provided on both sides of the secondary air chamber 3a; One air supply inner box 11a consisting of a chevron-shaped secondary air plate 4a having a large number of flame-holding air ports 7 and secondary air ports 8 installed to cover the opening, and a pressure equalizing plate 14;
A secondary air chamber 3b located on both sides of the burner and having respective openings facing the combustion chamber 9;
It has a burner outer frame 5b integrally molded from Al extruded material forming a flame stabilizing air chamber 6 provided on one side of the burner, and a large number of flame stabilizing air ports 7 and secondary air ports 8 installed to cover the opening. An air supply outer box 11b consisting of a semi-mounted secondary air plate 4b and a pressure equalization plate 14, and a large number of flame ports 2 clamped between the air supply inner box 11a and the air supply outer box 11b are provided. According to
The mixture is supplied from upstream of the burner, and the secondary air is supplied from an equalized air supply box.

Secondary air is supplied from the burner end face to the secondary air chambers 3a, 3.
After entering b, the pressure is equalized by the pressure equalization plate 14, and then the secondary air plate 4
It is supplied to the flame from a and 4b. The air-fuel mixture is uniformly supplied between the air supply boxes from a mixing chamber 1 located upstream of the burner at a low flow rate, and is ejected from the flame port 2. In order to reduce the noise of a high-load burner, the air-fuel mixture that determines the combustion density must be distributed uniformly to each burner port.The maximum flow rate of the mixture is 0.5 to 1 m/sec, but It is important to keep the upstream flow velocity below 1 m/sec to avoid creating turbulence.

With this configuration, the air-fuel mixture can be supplied between the air supply inner box 11a and the air supply inner box 11b at a flow rate of 0.5 m/sec or less and with good distribution, resulting in a low-noise, high-load burner. Furthermore, as is clear from FIG. 3, by increasing the number of air supply inner boxes 11a, it is possible to increase the capacity and to easily organize the burners in series in the depth and width directions. Since the burner inner frame 5a and the burner outer frame 5b are integrally molded from Al extruded material, they can be molded so that not only no air leaks, but also the pressure equalizing plate 14 can be easily inserted.

Effects of the Invention According to the high-load burner of the present invention, the following effects can be obtained.

(1) The air-fuel mixture is supplied at a low flow rate between the air supply boxes from the mixing chamber located upstream of the burner, resulting in good distribution, no turbulence, and low noise.

(2) By increasing or decreasing the number of air supply inner boxes and changing the cutting length of the integrally molded member, burners can be freely arranged in series in the depth and width directions, and large capacity can be accommodated.

(3) Since the burner frame is integrally molded from Al extrusion material, there is no air leakage and the pressure equalizing plate can be easily inserted.

[Brief explanation of the drawing]

Figure 1 is a sectional view of a conventional high-load burner;
The figure is a cross-sectional view of a water heater using a high-load burner according to an embodiment of the present invention, and FIG. 3 is a cross-sectional view of the same high-load burner. 1...mixing chamber, 2...flame port, 3a, 3b...
Secondary air chamber, 4a, 4b...Secondary air plate, 5a...
... Burner inner frame, 5b... Burner outer frame, 8... Secondary air port, 9... Combustion chamber, 11a... Air supply inner box, 11b... Air supply outer box.

Claims (1)

[Claims] 1. A burner inner frame integrally formed to form a secondary air chamber having respective openings facing the combustion chamber and flame-holding air chambers provided on both sides of the secondary air chamber, and installed to cover the openings. one or more air supply inner boxes consisting of a chevron-shaped secondary air plate and a pressure equalizing plate each having a large number of secondary air ports and flame stabilizing air ports; A burner outer frame integrally formed to form a secondary air chamber with an opening and a flame-holding air chamber provided on one side of the secondary air chamber, and a large number of secondary air chambers installed to cover the opening. An air supply outer box consisting of a semi-angular secondary air plate having a mouth and a flame-holding air port, and a plurality of air supply boxes interposed between the air supply inner box and between the air supply inner box and the air supply outer box. By providing a flame port consisting of a flame port and a mixing chamber on the upstream side of the burner inner frame and burner outer frame, the mixture is supplied from upstream of the burner and the secondary air is supplied to an equalized pressure air supply box. A high-load burner configured to be supplied from