JPH018833Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an all-primary air combustion type gas burner device that is applied to hot air heaters and other devices.

(Prior Art) The applicant of the present application has previously developed a device of this type that includes a combustion plate on the upper surface having a large number of flame ports on the lower side of the combustion chamber, a mixing chamber on the lower side thereof, and an opening at the tip. In a type equipped with an all-primary air combustion type gas burner consisting of a gas burner and a mixing pipe connected to it and a mixing pipe below it,
In order to prevent the generation of combustion noise due to the vibration of the combustion flame due to the increase in exhaust pressure that occurs during ignition, we have proposed a type in which a pressure blocking plate is provided in the mixing chamber in front of the opening. Depending on the type of gas used, this may not necessarily be sufficient, and there is the disadvantage that it tends to generate some combustion noise. To explain further, in this case, the air-fuel mixture in the mixing tube is generally introduced to the entire surface of the combustion plate and ignited thereon at the same time. The exhaust pressure is likely to increase significantly causing the combustion noise.

(Problems to be Solved by the Invention) The object of the present invention is to provide a device that does not have such disadvantages, that is, a device that further reduces the generation of combustion noise.

(Means for Solving the Problems) The present invention is based on such a viewpoint, and consists of a combustion plate on the lower side of the combustion chamber having a plurality of flame ports on the upper surface, and a mixing chamber on the lower side thereof. and a mixing tube below it that is connected to it through an opening at its tip, and a pressure blocking system that blocks the pressure introduced into the mixing chamber to the opening in front of the mixing tube. In the type equipped with a plate, a hollow tube is provided in the mixing chamber, the lower part of which communicates with the mixing tube, and the upper end of which faces the lower surface of the combustion plate, and the upper side of the combustion plate where the hollow tube faces. It consists of a igniter facing the front.

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

In the drawings, reference numeral 1 indicates a combustion chamber, and on the lower side of the combustion chamber 1, there is a combustion plate 3 on the upper surface having a plurality of flame ports 2;
It is equipped with an all-primary air combustion type gas burner 6 consisting of a lower mixing chamber 4 and a lower mixing pipe 5 connected to it through an opening 5 at its tip. A pressure blocking plate 7 guided into the opening 5 is provided. The drawing shows an example of the application to a warm air heater, and the entire structure is as clearly shown in FIG. A hot air fan 9 is provided on the upper side of the heat exchanger, and when the fan 9 operates, indoor air is guided into the main body 8 from the suction port 10 on the upper side of the back side. After being heated, it was repeatedly discharged from the outlet 11 on the lower front side.

Although the above is not particularly different from the conventional one, the present invention provides a hollow tube 12 in the mixing chamber 4 that communicates with the mixing tube 6 at the lower part and whose upper end faces the lower surface up to the combustion plate 3. , in which the igniter 14 faces the upper side of the combustion plate 3 in the part where the hollow tube 12 faces, and to explain in more detail what is shown in the figure, it is a hollow tube whose lower part is inserted into the middle part of the mixing tube 6. The upper end of the hollow tube 12 was made to protrude to the lower surface of the combustion plate 3, and the hollow tube 12 was formed by cutting out the mixed gas supply source side of the mixing tube 6 to form a mixed gas inlet 12a.

(Function) To explain its function, considering the time of ignition, a part of the mixed gas led through the mixing pipe 6 first passes through the hollow pipe 12 and relatively quickly burns the gas above it. The mixed gas is guided into the chamber 3 and ignited by the igniter 14 located above it, and most of the mixed gas flows out from the opening 5 at the tip of the mixing tube 6 into the mixing chamber 4 and is then dispersed into the hollow tube 12. After the gas is ejected from the flame ports of the continuous combustion plates 3, the gas is ejected from the flame ports provided on the remaining combustion plates 3, and ignition occurs due to the transfer of flame from the part that was ignited first. Therefore, at the time of ignition, the ignition in the remaining combustion plate 3 is delayed from the ignition in the portion to which the mixed gas is supplied via the hollow tube 12. Therefore, there is no problem described above when the combustion plate 3 is introduced with gas substantially simultaneously over its entire surface and ignited substantially simultaneously. That is, there is no large increase in exhaust pressure that occurs when simultaneous ignition occurs, and the generation of vibration noise associated with this is reduced, and the temperature of the part that is ignited first rises relatively quickly due to the ignition. This phenomenon also works effectively to reduce the generation of vibration noise.

(Effects) In this way, according to the present invention, gas is introduced into a part of the combustion plate 3 relatively early to ignite it, and then gas is introduced into the remaining part with a little delay and ignited. Compared to the conventional method in which gas is guided almost simultaneously over the entire surface and ignited almost simultaneously, it is possible to reduce the increase in exhaust pressure, and the vibration of the combustion chamber due to the increase in pressure and the associated combustion. In order to reduce noise as much as possible, a hollow tube is provided whose lower part communicates with the mixing tube and whose upper end faces the bottom surface of the combustion plate. This can be done by simply placing the igniter on the upper side of the plate, so there is no need for a separate gas nozzle for ignition, and the structure is simple and easy to manufacture.

[Brief explanation of the drawing]

Fig. 1 is a cutaway side view of an example of a warm air heater equipped with the proposed device, Fig. 2 is an enlarged cutaway front view of its main parts, Fig. 3 is a cutaway plan view thereof, and Fig. 4 is a cutaway thereof. FIG. 1... Combustion chamber, 2... Flame port, 3... Combustion plate, 4
...Mixing chamber, 5...Opening, 6...Mixing tube, 7...
Pressure blocking plate, 12...first passage, 13...second passage.

Claims (1)

[Scope of utility model registration request] An all-primary air combustion type combustion system consisting of a combustion plate on the upper surface with a large number of flame ports on the lower side of the combustion chamber, a mixing chamber below the combustion plate, and a mixing pipe connected to the mixing chamber through an opening at the tip. A gas burner is provided, and a pressure blocking plate is provided in front of the mixing chamber to block the pressure introduced into the opening, the mixing chamber being in communication with the mixing tube at the lower part, and having an upper end connected to the lower surface of the combustion plate. A gas burner device comprising a facing hollow tube and an igniter facing above a combustion plate in a portion facing the hollow tube.