JPH0547933Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a combustion device used in a forced oil vaporization combustion device, etc.

<Prior art> Fig. 5 is an exploded perspective view of a burner used in this combustion device, Fig. 6 is a sectional view taken along the line C-C in Fig. 5, Fig. 7 is a schematic configuration diagram of the combustion device, and Fig. 8 is a plan view of the burner.

This type of combustion device includes a vaporizer 20 that heats and vaporizes fuel such as kerosene, a burner 10 that burns the fuel vaporized by the vaporizer 20, and an ignition heater 30 that ignites the fuel. The burner 10 is formed integrally with a mixer 12 that mixes fuel injected from a nozzle 21 of a carburetor 20 with primary air to form a mixed gas, and a burner top complete 11 that burns the mixed gas. . Further, the ignition heater 30 is installed so that its tip is located above the flame hole network 112.

The burner top complete 11 is a burner top 11 having an opening 111a along the longitudinal direction.
1, a substantially gutter-shaped flame hole network 112 protruding from the opening 111a, and a backnet 113 provided below the flame hole network 112.

Further, the mixer 12 that is integrated with the burner top complete 11 to constitute the burner 10 is
Bottom 123 connected to burner top 111
, a partition plate 122 sandwiched between the bottom 123 and the burner top 111, and a rectifying plate 121 provided at the end of the partition plate 122.

The flame is formed so as to rise on the flame hole network 112.

<Problem to be solved by the invention> Because the flame rises from the flame hole net 112, the tip of the ignition heater 30 is always exposed to the flame during combustion and becomes hot.
was confirmed to be heated to approximately 1100°C.
The ignition heater 30 is made of nitride and silicon, and a sintering aid is mixed in when it is pressure sintered, but the heat resistance temperature of this sintering aid is approximately 1500° C. Therefore, the ignition heater 30 exposed to flames gradually deteriorates due to the high temperature during combustion, and the ignition performance decreases over time.

This idea was devised in view of the above circumstances.
It is an object of the present invention to provide a combustion device in which the ignition heater does not reduce the ignition performance over time.

<Means for solving the problem> The combustion device of the present invention is a combustion device having a mixer that mixes fuel heated and vaporized in a carburetor with primary air to produce mixed gas, a burner that is provided above the mixer and has an integrated burner top complete that burns the mixed gas, and an ignition heater, and the burner is provided with a passing mixed gas reduction means at a location opposite the ignition heater to reduce the amount of mixed gas passing through.

<Operation> The fuel heated and vaporized in the vaporizer is injected into the mixer through the nozzle. The mixer mixes the primary air and the injected fuel to form a mixed gas. The mixed gas has a static pressure in the back net, and after making the ejection speed and combustion speed of the mixed gas equal to each other in the flame hole network, it becomes a flame in the flame hole network. At this time, since there is an extra passage mixed gas reducing means in the part corresponding to the ignition heater, the amount of mixed gas passing through the flame hole network is reduced compared to other parts. Therefore, the temperature of the flame to which the ignition heater is exposed is lower than that of other parts of the flame.

<Embodiment> An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is an exploded perspective view of a burner of a combustion device according to a first embodiment of the present invention, FIG. 2 is a sectional view taken along line A-A in FIG. 1, and FIG. An exploded perspective view of the burner, FIG. 4 is a sectional view taken along the line B--B in FIG. 3. Note that parts and the like that are substantially the same as those of the conventional one will be described with the same reference numerals.

The combustion apparatus according to the present invention includes a mixer 12 that mixes fuel injected from a vaporizer 20 that heats and vaporizes fuel and primary air to produce a mixed gas, and a burner top complete 11 that burns the mixed gas.
This combustion device has a burner 10 integrally formed with the ignition heater 30 and an ignition heater 30 that ignites the mixed gas and is provided opposite the burner 10. A passing mixed gas reducing means 114 for reducing the amount of passing mixed gas is provided at a location opposite to the passing mixed gas.

The vaporizer 20 heats and vaporizes fuel such as kerosene,
The fuel is injected at high pressure from the nozzle 21 toward the mixer 12. A mixer 12 provided opposite the nozzle 21 mixes the injected fuel and primary air to form a mixed gas, and together with the burner top complete 11 constitutes the burner 10. .

First, a first embodiment of the present invention will be described with reference to FIGS. 1 and 2.

The burner 10 is composed of a burner top complete 11 and a mixer 12 as described above. The burner top complete 11 is a burner top 111 which is raised along the longitudinal direction and has an opening 111a in the raised part.
and a flame hole network 112 protruding from the opening 111a,
Backnet 1 for preventing the so-called backfire phenomenon in which the flame ignites the mixed gas inside the burner 10
13, and passing mixed gas reducing means provided between the flame hole network 112 and the backnet 113. Intermediate net 11 as means for reducing the passing mixed gas
Similar to the backnet 113, the numeral 4 has a net shape and is designed to cover only the tip of the backnet 113.

The mixer 12 includes a bottom 123 connected to the burner top 111, and a partition plate 122 sandwiched between the bottom 123 and the burner top 111.
A rectifying plate 121 provided at the tip of the partition plate 122
It has The current plate 121 is used to make the gas pressure of the mixed gas injected from the nozzle 21 uniform, and to gradually make the dynamic pressure of the mixed gas to static pressure so that the suction of primary air is not inhibited.

Next, the operation of the combustion device according to the first embodiment will be explained.

The fuel heated and vaporized in the vaporizer 20 is passed through the nozzle 2
1 into the mixer 12. Mixer 12
Then, the primary air and the injected fuel are mixed to form a mixed gas. The mixed gas becomes static pressure in the back net 113, and after making the ejection speed and combustion speed of the mixed gas equal to each other in the flame hole network 112, the flame hole network 1
At 12 it becomes a flame. At this time, there is an extra intermediate net 114 in the portion corresponding to the ignition heater 30, that is, the aperture ratio of this portion is lower than that of other portions, so the amount of mixed gas passing through the flame hole net 112 is smaller than that of other portions. It has decreased compared to the . Therefore, the temperature of the flame to which the ignition heater 30 is exposed is lower than that of other parts of the flame.

Next, the third section regarding the combustion device according to the second embodiment will be explained.
This will be explained with reference to the figures and FIG. In addition, the first
Descriptions of parts similar to those in the embodiment will be omitted.

The backnet 113 is set longer than that of the first embodiment. That is, backnet 11
The tip of back net 113 is formed as a double net 113a as a passing mixed gas reducing means, and by bending the double net 113a at the tip in the direction of arrow D in FIG. Since the aperture ratio of the tip is lower than that of other parts, the amount of mixed gas passing through this tip is smaller than that of the other parts. Therefore, the temperature of the flame to which the ignition heater 30 is exposed is lower than that of other parts of the flame.

In addition, in the combustion apparatus according to the present invention, it has been confirmed through experiments that the temperature of the ignition heater 30 is approximately 900 to 950°C.

<Effects of the invention> The combustion device according to the invention is provided with a passing mixed gas reducing means for reducing the amount of passing mixed gas at a location where the burner faces the ignition heater.
The amount of mixed gas passing through is reduced. Therefore, even when the ignition heater is exposed to flame, it is maintained at a lower temperature than conventional heaters. That is, the deterioration of the ignition heater is less than that of conventional heaters, and the deterioration of ignition performance over time is reduced.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view of a burner of a combustion device according to a first embodiment of the present invention, FIG. 2 is a sectional view taken along line A-A in FIG. 1, and FIG. An exploded perspective view of the burner, FIG. 4 is a sectional view taken along the line B-B in FIG. 3, FIG. 5 is an exploded perspective view of the burner used in this combustion device, and FIG. 7 are schematic configuration diagrams of the combustion device, and FIG. 8 is a plan view of the burner. 10... Burner, 11... Burner top complete, 113a... Double net (passing mixed gas reducing means), 114... Intermediate screen (passing mixed gas reducing means), 12... Mixer, 20... Vaporizer , 30...
...Ignition heater.

Claims (1)

[Scope of utility model registration request] A burner that is integrated with a mixer that mixes fuel heated and vaporized in a vaporizer and primary air to form a mixed gas, and a burner top complete that is installed above the mixer and burns the mixed gas; A combustion apparatus having an ignition heater, characterized in that the burner is provided with passing mixed gas reducing means for reducing the amount of passing mixed gas at a location facing the ignition heater.