JPH08599Y2 - Liquid fuel combustion device - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to an improvement of a liquid fuel combustion apparatus used in a hot air heater or the like.

[Conventional technology]

FIG. 2 is a sectional view showing the structure of a conventional liquid fuel combustion apparatus. In the figure, 1 is a fuel tank of a cartridge type, 2 is an oil tray, 3 is an oil supply pipe, 4 is an electromagnetic pump, 5
Is an overflow type oil leveler, 5a is its oil level defining wall,
6 is a blower for combustion, 7 is a blower pipe, 8 is a fuel pipe made of a copper-based metal material, 9 is an orifice provided at the tip thereof for controlling the flow rate of fuel, 10 is a fuel nozzle,
11 is an air nozzle, 12 is a vaporizer, 13 is a burner head, 14
Is a heater for preheating the vaporizer 12, and 15 is a pressure pipe.

Here, the fuel pipe 8 is required to have a portion for connecting an orifice for flow rate control, need to be bent in terms of shape, and be strong against fuel and water. However, aluminum has a drawback that it is weak against water, and nickel has a drawback that it is costly because it is expensive. Further, since stainless steel has a drawback of poor workability, a copper-based metal material having excellent workability and corrosion resistance as a whole is selected.

 The operation of the above configuration will be described.

The fuel is pumped into the constant oil leveler 5 by the electromagnetic pump 4 through the fuel tank 1, the oil pan 2, and the oil supply pipe 3, and the oil level defining wall
It overflows from the upper end surface of 5a and maintains a constant oil level. When the blower 6 for combustion operates and the static air pressure P is applied to the oil level in the constant oil leveler 5 through the pressure pipe 15, the flow rate is increased. The fuel is pushed up in the fuel pipe 8 through the orifice 9 and ejected from the tip of the fuel nozzle 10 into the vaporizer 12. The fuel is atomized by the shearing action of the air flow flowing out of the air nozzle 11 through the blower pipe 7,
After being instantly vaporized on the inner wall surface of the vaporizer 12 preheated by 14, it is mixed with air, reaches the burner head 13, and is ignited and burned.

[Problems to be solved by the device]

Since the conventional liquid fuel combustion device is configured as described above, when the combustion is stopped, the fuel remains in the constant oil level device 5, so that part of the fuel pipe 8 is constantly immersed in the fuel.

However, when the fuel pipe 8 is formed of a copper-based metal material when exposed to water for a long time in a fuel that is easily oxidatively deteriorated, the copper component acts as a catalyst, and in particular, the inner wall of the fuel pipe 8 has an organic acid. Metal salt is generated in a short time, and
The adhered metal salt drops off and adheres to the hole of the orifice 9,
There were problems such as blocking the passage of fuel.

The present invention has been made in order to solve the above problems, and it is an object of the present invention to obtain a liquid fuel combustion apparatus that does not cause a fuel passage obstacle even when a fuel pipe is immersed in a fuel that is easily oxidized and deteriorated for a long time. To aim.

[Means for solving the problem]

In the liquid fuel combustion device according to the present invention, the liquid fuel stored in the overflow type oil leveler is taken out to the outside by a fuel pipe provided with an orifice for controlling the flow rate of the fuel at its tip, The fuel pipe is made of a copper-based metal material, and at least the surface of the portion that is always in contact with the liquid fuel is covered with a metal material other than copper-based material.

[Action]

In the liquid fuel combustion apparatus according to the present invention, since the portion of the fuel pipe made of the copper-based metal material does not come into direct contact with the liquid fuel for a long time, the organic acid metal salt generated by the catalytic action of the copper component does not adhere. Therefore, it is possible to prevent the orifice from being blocked and obstructing the passage of fuel.

〔Example〕

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

FIG. 1 is an enlarged sectional view of an essential part showing an embodiment of the present invention, and 8a is a nickel plating layer applied to the inner and outer surfaces of the fuel pipe 8.

With the above structure, since the nickel plating layer 8a is coated on the portion where the fuel pipe 8 is constantly immersed in the liquid fuel, the fuel pipe 8 is made of a copper-based metal material. However, the copper component does not catalyze to produce the organic acid metal salt, and the problem that the hole of the orifice 9 is blocked to prevent passage of fuel is solved.

In the above embodiment, the entire fuel pipe 8 is covered with the nickel plating layer 8a. However, the object can be achieved even if the fuel pipe 8 is applied only to the portion which is always in contact with the fuel. Needless to say.

[Effect of device]

As described above, according to the present invention, at least the portion of the fuel pipe that is in constant contact with the liquid fuel is covered with a metal material other than copper in the constant oil level gauge, so that a fuel that is easily oxidized is used. However, the formation of the organic acid metal salt due to the catalytic action of the copper component is eliminated, and the clogging of the orifice due to the metal salt can be prevented.

[Brief description of drawings]

FIG. 1 is an enlarged sectional view of a liquid fuel combustion apparatus according to an embodiment of the present invention, and FIG. 2 is a sectional view showing a conventional liquid fuel combustion apparatus. In the figure, 5 is a constant oil level gauge, 5a is an oil level defining wall, 8 is a fuel pipe, and 8a is a nickel plating layer. The same reference numerals in the drawings indicate the same or corresponding parts.

Claims (1)

[Scope of utility model registration request] 1. A fuel pipe in which the liquid fuel stored in an overflow type oil leveler is taken out by a fuel pipe provided with an orifice at its tip for controlling the flow rate of the fuel. A liquid fuel combustion apparatus characterized in that the material is made of a copper-based metal material, and at least the surface of the portion that is always in contact with the liquid fuel is covered with a metal material other than copper-based material.