JPH066919U - Flame radiant gas burner - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a flame radiant gas burner that can positively supply secondary air and has a high calorie output. [Structure] A technical means is adopted in which a large number of air jets are provided around the flame radiating portion and secondary air is jetted from the air jets by using a blower so as to wrap the flame. [Effect] The space for intake of the secondary air of the flame can be significantly reduced compared to the conventional one, and at the same time, the burner device can be downsized and the heating performance can be improved, and the flame can be stabilized straight ahead. Sex also increased.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a compact high performance gas burner having a blower.

[0002]

[Prior art]

 A burner is a heating device that uses reaction heat generated when gaseous fuel or the like is burned as a heat source, and heats an object to be heated directly or using water or the like as a heat medium. Therefore, it is important to burn the fuel efficiently, and efficient contact with air (combustion air) as an oxygen source is required for complete combustion.

For this complete combustion, at present, a measure is taken in which a part of combustion air (primary air) is mixed with a fuel gas in advance to obtain a mixed gas and the mixed gas is ignited. The flame generated by ignition further takes in combustion air (secondary air) from around the flame, so that combustible components remaining in the flame are burned and complete combustion is achieved. In this method, it is important to supply not only primary air but also secondary air.If the secondary air is not sufficiently supplied to the flame, the minimum amount of secondary air required to burn the remaining combustible components is required. If it cannot be ingested, it will be incompletely burned, and not only the expected calorific value of combustion cannot be obtained, but also dangerous. Thus, sufficient supply of secondary air was necessary to achieve complete combustion.

The improvement of the heating performance of the burner is carried out by increasing the fuel gas consumption per unit time, and even in this case, it is important to realize the above-mentioned complete combustion. In order to improve the burner performance, simply increasing the injection amount of fuel gas will cause incomplete combustion. As the amount of fuel gas burned increases, naturally the required intake of secondary air also increases. Measures must be taken at the burner to accommodate this increase in secondary air intake. In conventional burners, flame holes were sparsely arranged to secure a certain amount of space around the flame, thereby promoting the flow of secondary air to the flame and dealing with this. For this reason, the amount of fuel gas consumed has been improved, that is, the burner heating performance has been improved, and the burner device has inevitably become large in size.

Further, when the ejection speed of the combustion gas from the gas ejection port is increased by increasing the fuel gas ejection amount, the following problems further occur. In other words, the speed difference between the flame and its surroundings naturally increases with the increase in the gas ejection speed, but if this speed difference increases, turbulence occurs in the flame. With this turbulent flame, it was difficult to obtain long flame radiation, and the flame was unstable, which made it difficult to handle and even dangerous.

[0006]

[Technical issues to be solved]

 The present invention has been made in view of the above-mentioned problems in the conventional flame radiant gas burner, and it is possible to increase the gas combustion amount without increasing the size of the device, and to increase the flame. It is a technical issue to provide a flame radiant gas burner that can output high calories while being compact, which can improve the straight running stability.

[0007]

[Means adopted for solving the problem]

 According to the present invention, an air chamber having a large number of air ejection holes formed so as to surround the burner surface is provided around the burner surface in the flame radiating section, and the air chamber is provided with a branch ventilation pipe. The above technical problem is solved by adopting a means of ejecting secondary air from the air ejection port by communicating with the blower pipe.

[0008]

【Example】

 Hereinafter, the present invention will be described with reference to embodiments shown in the accompanying drawings. 1 is a perspective view of an embodiment of the present invention, FIG. 2 is a schematic cross-sectional view of the embodiment, FIG. 3 is an enlarged schematic cross-sectional view of the flame radiating portion of the embodiment, and FIG. 4 is an application example of the embodiment. It is a schematic sectional drawing which shows.

In FIG. 1, reference numeral 2 indicates a blower pipe to which combustion air is supplied by the blower 1. The blown combustion air is used as the primary air and is fed through a hand cock type air conditioner 3 to be described later. Supply to the mixing tube 4. An air intake 10 is provided in the blower pipe 2, and a part of the combustion air is supplied to the air chamber 12 as a secondary air through a branch air pipe 11 formed of an air hose. What is indicated by reference numeral 4 is a mixing pipe in which the fuel gas and the primary air are mixed, which is taken in at the fuel gas inlet 5 and supplied with the fuel gas through the fuel gas regulator 6 and the fuel gas pipe 7. The primary air supplied from the blower pipe 2 is mixed. The mixed gas generated in the mixing pipe 4 passes through the mixing chamber 8 and is ejected from a large number of gas ejection ports 9a, 9a, ... The jetted mixed gas is ignited by the igniter 13 and burned. Then, the generated flame further inhales combustion air (secondary air) to achieve complete combustion.

In the present embodiment, by adopting a means of positively blowing the secondary air to the flame using the blower 1, the secondary air intake of this flame is assisted. The details will be described below.

An air chamber 12 is provided around the flame radiating portion 9, and a large number of air ejection ports 12 a, 12 a ... Are provided in the air chamber 12 so as to surround the burner surface A of the flame radiating portion 9. Has been drilled. The air chamber 12 is connected to the air intake 10 at its lower portion via a branch air passage 11. As a result, a part of the combustion air from the blower 1 passes through the branch ventilation pipe 11 as the secondary air and is ejected from the numerous air ejection ports 12a, 12a ... .

Another feature of this embodiment is a method of mixing the primary air and the fuel gas in the mixing pipe 4. Next, this will be described with reference to the schematic sectional view shown in FIG.

In FIG. 2, a reference numeral 7 indicates a fuel gas pipe for guiding the fuel gas to the mixing pipe 4, which is installed through the mixing pipe 4. A fuel gas ejection port 7a is formed in a surface of the inner end facing the primary air flow supplied by the blower pipe 2. The turbulent flow generated by ejecting the fuel gas countercurrently to the primary air flow is used to promote the mixing of the two.

Next, the periphery of the flame radiating portion 9 of this embodiment will be described with reference to the schematic sectional view shown in FIG. In FIG. 3, what is indicated by reference numeral 8 is a mixing chamber, and the mixed gas generated in the mixing pipe 4 is guided to the flame radiating section 9. The flame radiating part 9 is composed of two stainless steel punching plates 9c and 9d having a large number of pores, and a ceramic plate 9b, which serve as an appropriate obstacle for the mixed gas flow and thus the burner surface A It is possible to uniformly eject a mixed gas from a large number of gas ejection ports 9a, 9a ... Bored in the ceramic plate 9b.

FIG. 4 shows an application example of the flame radiant gas burner of this embodiment, in which the obtained flame is a heat exchange pipe arranged in water or oil (hatched portion in FIG. 4). It radiates directly to 14 to heat water or oil. When adopting this heating method, a compact and high-performance gas burner is required because the installation location is limited, and in addition, a long flame is required for uniform heating of water or oil. Was needed.

Although the embodiment of the present invention is configured as described above, it can be changed within the description of "Claims for utility model registration", for example, to increase the flame radiation area where flame is emitted. , Two or more flame radiating parts 9 each having a large number of air outlets 12a arranged in parallel are arranged side by side, and the secondary air can be injected not only from around the burner surface A but also from within the burner surface. The air chamber 12 may be installed as described above. In addition, an adjuster may be installed in the air intake 10 so that the ejection amount of the secondary air can be adjusted independently.

[0017]

[Effects of the Present Invention] As described above with reference to the embodiments, the flame radiant gas burner of the present invention, in the mixing tube for mixing the fuel gas and the primary air, produces the fuel gas countercurrent to the flow of the primary air. By adopting the means of ejecting, the mixing of the two is promoted, the mixing tube is miniaturized, and the secondary air intake of the flame is positively made by using a blower for the flame. By adopting the means of supplying secondary air, the intake of secondary air was assisted, and the space for intake of secondary air was drastically reduced. Instead, it is possible to improve the heating performance.

Further, since the injection of the secondary air is performed so as to wrap the generated flame, it is possible to suppress the turbulent flow generated between the flame and its surroundings, so that the stability of the straight traveling of the flame is remarkably improved. Will increase. This makes it possible to radiate the flame in any direction, and even when a long flame is required, due to this excellent flame straightness, it is not necessary to enlarge the blower as in the past. Instead, a small blower is sufficient, which leads to downsizing of the entire burner.

Further, the secondary air constantly flowing through the air chamber also plays a role of cooling the periphery of the flame radiating section 9, and at the same time, the secondary air that has absorbed heat and has become hot also contributes to the efficiency of combustion. Of.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is a schematic sectional view showing an embodiment of the present invention.

FIG. 3 is an enlarged schematic sectional view around a flame radiating portion according to an embodiment of the present invention.

FIG. 4 is a schematic cross-sectional view showing an application example of the flame radiation gas burner of the embodiment of the present invention.

[Explanation of symbols]

 1 Blower 2 Blower pipe 4 Mixing pipe 7 Fuel gas pipe 9 Flame emission part 11 Branch ventilation pipe 12 Air chamber 12a Air ejection port A Burner surface

Claims (3)

[Scope of utility model registration request] 1. A mixed gas produced by mixing primary air supplied by a blower 1 through a blower pipe 2 and fuel gas supplied from a fuel gas intake port 5 in a mixing pipe 4, a flame emission part 9 Is a gas burner that burns while taking in secondary air. Around the burner surface A of the flame radiating portion 9, a large number of air ejection openings 12a, 12a ... Perforated to surround the burner surface A are formed. The air chamber 12 is provided,
This air chamber 12 is provided with the blower pipe 2 through a branch ventilation pipe 11.
To communicate with the air outlet 12a.1
A flame radiation gas burner characterized in that secondary air is ejected from 2a. 2. Around and inside the flame radiating section 9,
An air chamber 12 having a large number of air ejection ports 12a, 12a ...
Is provided and the air chamber 12 is communicated with the blower pipe 2 through the branch ventilation pipe 11, so that the air ejection port 1 located around the burner surface A and inside the burner surface A is provided.
The flame radiant gas burner according to claim 1, wherein secondary air is ejected from 2a, 12a, .... 3. In the mixing pipe 4, the fuel gas is injected countercurrently to the primary air flow from the blower pipe 2,
A fuel gas pipe 7 is installed in communication with the mixing pipe 4,
A flame radiant gas burner according to claim 1 or 2, characterized in that the fuel gas is jetted countercurrently to the primary air stream to promote mixing with the primary air.