JPH08189644A - Low nox gas range for chinese cooking - Google Patents

Abstract

PURPOSE: To provide a low NOx gas range with a lower noise by reducing the amount of NOx generated during combustion. CONSTITUTION: A gas and air are mixed previously in a mixing chamber 38 so that the amount of air becomes excessive beyond a theoretical mixing ratio while the gas and the air mixed are ignited with a heating body 39 in an ignition chamber 40 and then, a combustion is started. As a result, operation sounds are lowered to reduce the disturbance of the combustion. This allows a stable low NOx combustion under highly excessive air thereby lessening the amount of NOx to be generated significantly.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas range for a wok used in a Chinese restaurant or the like, and particularly to a low NOx gas range for a Chinese food which produces little nitrogen oxide, so-called NOx. Regarding

[0002]

2. Description of the Related Art Conventionally, a gas range for Chinese food used in a Chinese restaurant has a burner of higher heat power than an ordinary gas range because quick heating is required due to the nature of Chinese food. The range is used. FIG. 2 is a side sectional view showing a schematic configuration of a conventional Chinese gas range. In the same figure, this Chinese gas range 10
Is composed of a blower 12, an air supply pipe 14, a gas supply pipe 16, a mixing chamber 17, a combustion chamber 18, and the like.

The blower 12 has its outlet connected to the end of the air supply pipe 14, forcibly supplies air to the air supply pipe 14, and the supplied air is in the middle of the air supply pipe 14. Then, the gas supplied from the gas supply pipe 16 is mixed. The mixed gas is blown into the combustion chamber 18 through the holes of the gas mixture plate 20 and is ignited in the combustion chamber 18 to form a violent flame, which heats the wok 24 on the wok frame 22.

[0004]

However, the conventional Chinese gas range has the following problems. First, in order to create a powerful flame, combustion is carried out under a higher load than in a normal gas range, and therefore, there is a problem that a large amount of nitrogen oxides such as NO and NO ₂ , so-called NOx is generated. there were. Therefore, there is a drawback that the air in the kitchen is contaminated with NOx.

Secondly, in the conventional Chinese gas range, the blower 12 is forced to blow air, and the gas and air are mixed in the air supply pipe 14, so that the blower 12 is operated. There is also a drawback that the generated noise is large.

The present invention has been made in view of such circumstances, and an object of the present invention is to provide a low-NOx gas range for Chinese food, which produces a small amount of NOx during combustion and has low noise.

[0007]

In order to solve the above problems, a low NOx gas range for Chinese food of the present invention is connected to an air supply pipe, and a blower for forcibly supplying air into the air supply pipe, and the air. A mixing chamber, which is provided near the inlet of the supply pipe, preliminarily mixes the air supplied from the blower and the gas supplied from the gas supply pipe, and is provided near the outlet of the air supply pipe, from the mixing chamber. An ignition chamber having a heating element that ignites the introduced air-fuel mixture, and a combustion chamber in which the air-fuel mixture blown from the ignition chamber burns are included.

[0008]

According to the low NOx gas range for Chinese food of the present invention,
Since gas and air are premixed in the mixing chamber,
Due to the uniform combustion of the air-fuel mixture, the combustion noise associated with the turbulence of combustion is low, and the noise when using the gas range is reduced. In addition, since the heating element always burns the air-fuel mixture while guaranteeing it to ignite, a stable low N
Ox combustion becomes possible, and NOx when using a gas range can be greatly reduced.

[0009]

The preferred embodiments of the low NOx gas range for Chinese food according to the present invention will now be described in detail with reference to the accompanying drawings.

FIG. 1 is a side sectional view showing a schematic structure of a low NOx gas range for Chinese food according to an embodiment. As shown in FIG. 1, the gas range 30 of this embodiment includes a blower 32, an air supply pipe 34, a gas supply pipe 36, a mixing chamber 38, and a heating element 3.
9, an ignition chamber 40, a combustion chamber 42, a support base 44 and the like.

An outlet of the blower 32 is connected to the end of the air supply pipe 34, and the air is forcibly fed into the mixing chamber 38 provided near the inlet by the operation of the blower 32. Become. A gas supply pipe 36 is inserted from the vicinity of the inlet of the air supply pipe 34, and gas is supplied into the mixing chamber 38 from the gas supply hole 36A. Thereby, in the mixing chamber 38, the blower 3
The air supplied from No. 4 and the gas supplied from the gas supply pipe 36 are mixed in advance prior to combustion. In order to suppress the generation of NOx, the air-fuel mixture is set to have a mixing ratio such that the amount of air is more than the theoretical mixing ratio.

A current plate 36B is provided in the middle of the air supply pipe 34.
Is installed so as to partition the air supply pipe 36, and the ignition chamber 4
0 is formed in the air supply pipe 36. Ignition chamber 40
Can be ventilated to the mixing chamber 38 by the vent hole 36C formed in the flow regulating plate 36B, and the gas previously mixed with the air in the mixing chamber 38 is introduced into the ignition chamber 40 by the blowing pressure of the blower 32. To be done.

Further, four rod-shaped heating elements 39 are hung around the exit of the ignition chamber 40, and a certain amount of heat is radiated into the ignition chamber 40 by opening and closing an electric switch (not shown). The mixture can be ignited. Further, the heating element 39 heats the air-fuel mixture prior to full-scale combustion, thereby compensating for the deterioration in flame holding performance which is reduced due to an excess of the air amount over the theoretical mixing ratio.
It also works to ensure stable combustion.

A combustion cylinder 46 is attached to the tip of the air supply pipe 34 to form a combustion chamber 42, and the air-fuel mixture blown out from the ignition chamber 40 is combusted in the combustion chamber 42. A dust receiver 47 is provided below the combustion cylinder 46.
Is provided to receive spilled broth etc. when using a gas stove. A support base 44 is attached to the upper part of the combustion cylinder 46 to form a gas range main body. A wok frame 48 is attached to the support base 44, and the wok 50 supports the wok 50.

The operation of the low NOx gas range for Chinese food of the present embodiment constructed as described above is as follows.
As shown in FIG. 1, in the mixing chamber 38, air is forcibly supplied from the air supply pipe 34 by the operation of the blower 32, while gas is supplied from the gas supply hole 36A of the gas supply pipe 36 to mix the air. Air and gas are premixed in the chamber 38. Air is supplied to the mixing chamber 38 so that the amount of air becomes excessive than the theoretical mixing ratio in order to perform low NOx combustion. The air-fuel mixture in the mixing chamber 38 moves toward the flow straightening plate 36B due to the blowing pressure of the blower 32, and the air vent 3
It moves to the ignition chamber 40 through 6C.

The air-fuel mixture is ignited by the heating element 39 in the ignition chamber 40, blown out into the combustion chamber 42 and burned in earnest. Here, the ignition chamber 40 is provided because if the amount of air is excessive, the combustion speed and flame temperature decrease and the flame holding performance deteriorates, so stable combustion becomes difficult, but the ignition source is always an ignition source. By making them contact with each other, it is possible to secure a stable flame and perform low NOx combustion under a high excess air ratio.

As described above, according to this embodiment, the gas and the air are premixed in the mixing chamber 38, so that the combustion noise due to the turbulence of combustion is low due to the uniform combustion of the mixture,
It is possible to reduce noise when using a gas stove. Further, since the heating element 39 is provided in the preceding stage of the combustion chamber 42, it is possible to perform low NOx combustion with high excess air,
It is possible to significantly reduce NOx when using a gas range.

The present invention has been described above with reference to the preferred embodiments, but the present invention is not limited to these embodiments, and various improvements and changes can be made within the scope of the present invention.

[0019]

As described above, according to the present invention,
It is possible to reduce the operating noise during use and NOx
As a result, the air in the kitchen can be kept clean when the gas range is used.

[Brief description of drawings]

FIG. 1 is a side sectional view showing a schematic configuration of a low NOx gas range for Chinese food according to an embodiment.

FIG. 2 is a side sectional view showing a schematic configuration of a conventional Chinese gas range.

[Explanation of symbols]

 30 Low NOx Gas Range for China 32 Blower 34 Air Supply Pipe 36 Gas Supply Pipe 36A Gas Supply Hole 38 Mixing Chamber 39 Heating Element 40 Heating Chamber 42 Combustion Chamber

Claims (1)

[Claims] 1. A blower connected to an air supply pipe to forcibly supply air into the air supply pipe; air provided near the inlet of the air supply pipe, supplied from the blower; and a gas supply pipe. A mixing chamber that pre-mixes the supplied gas, an ignition chamber that is provided near the outlet of the air supply pipe, and has a heating element that ignites the mixture introduced from the mixing chamber, and is blown from the ignition chamber. A low NOx gas range for Chinese food, comprising: a combustion chamber in which the air-fuel mixture burns.