JPH07180829A - Liquid fluid combustion apparatus - Google Patents

Abstract

PURPOSE:To improve the safety when a wrong fuel is used by lifting an oil tank to interrupt the supply of a fuel when a fuel other than normal fuels is used and oil pressure in an oil pan becomes higher than in the ordinary state. CONSTITUTION:Once a float switch 22c is raised owing to the rise of an oil level in an oil pan 2 when a fuel (e.g. gasoline, etc.,) other than normal fuels is used, the signal is inputted into a control circuit 30 and an output signal is provided to a solenoid valve 9. The solenoid valve 9 is, once the output signal is outputted from the control circuit 30, turned on, to lift upward a tank support 8 around a support point 23. An oil tank 1 placed on the tank support 8 is lifted together with the tank support 8, whereby an oil tank socket 11 and a protrusion 7a of a tank receiver 7 are separated, and an oil outlet of the oil tank socket 11 is closed to stop the rise of the oil level for interruption of combustion. Hereby, the safety is improved when a wrong fuel is used.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid fuel combustion device such as a vaporization type oil fan heater, and more particularly to a fuel combustion device having improved safety when a volatile fuel such as gasoline is used.

[0002]

2. Description of the Related Art A conventional liquid fuel combustion apparatus of this type, for example, a petroleum fan heater, is constructed as shown in FIGS. 2 and 3, and in FIGS. 2 and 3, 1 is an oil tank and 2 is an oil tank. A receiving tray, 3 is an oil feed pump, 4 is a vaporizer, 5 is a nozzle, 6 is a burner, and 21 is a float sensor.

As shown in FIG. 2, the oil feeding path of the oil fan heater constructed as described above temporarily stores the fuel in the oil supply tank 1 in the oil receiving tray 2. An oil feed pump 3 is attached to the oil tray 2, and the fuel is sucked up by the oil feed pump 3 and sent to the carburetor 4. The vaporizer 4 is heated to a high temperature and gasifies the fed fuel. This fuel gas is ejected from the nozzle 5 to the burner 6,
Air is mixed inside the burner 6 and burned on the upper surface of the burner 6.

In the oil feed path as described above, the oil pan 2
Refueling tank 1 so that the oil level inside the tank is constant
The shape of the mouthpiece is designed so that the fuel does not overflow from the oil pan 2. However, if a volatile fuel such as gasoline other than kerosene is mistakenly used, the temperature inside the refueling tank 1 rises due to the temperature rise of the equipment and the room temperature due to the combustion heat, and the tank internal pressure rises, and the fuel becomes increasingly oil. There is a risk that the oil will flow out to the pan 2 and as a result, the fuel will overflow from the oil pan 2 and ignite, causing a fire or equipment burnout.

Therefore, as a measure for avoiding such a danger, as shown in FIG.
It is proposed to equip. The float sensor 21 is a float machine that selects a material that floats with kerosene but sinks with gasoline.

That is, it is determined whether the fuel inside the oil pan 2 is kerosene or gasoline by utilizing the difference in the specific gravity of kerosene and gasoline based on the difference in the float position, and when it is determined to be gasoline, the combustion is forcibly stopped. To do.

[0007]

However, since the difference in specific gravity between kerosene and gasoline is small in practice, it is difficult to obtain a material suitable as a float material, and when the oil level in the oil pan 2 changes due to temperature or the like. However, since the float position also changes, the float sensor 21 malfunctions.

For this reason, not only the oil fan heater but also a general oil combustion device is not equipped with a device for discriminating the type of fuel, and as a result, several accidents occur due to the use of gasoline every year. is doing.

An object of the present invention was invented in view of the above circumstances, and it is an object of the present invention to obtain a liquid fuel combustion apparatus which is improved in safety when an erroneous fuel is used.

[0010]

A liquid fuel combustion apparatus according to a first aspect of the present invention uses a fuel other than a regular fuel and refuels when the oil level in the oil pan becomes higher than normal. The structure is characterized in that the tank is lifted and the supply of fuel is cut off. A liquid fuel combustion apparatus according to a second aspect of the present invention is characterized in that when the oil level abnormality occurs, it controls combustion and has an abnormality indicator on the front of the device.

[0011]

According to the present invention, even if the oil level in the oil receiving tray rises due to the use of erroneous fuel or the like, the float sensor detects it and shuts off the fuel supply from the beginning so that the oil overflowing is prevented. It can be prevented. The indicator can then alert the user to an abnormally elevated oil level in the oil pan and give him the opportunity to check the fuel.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a liquid fuel combustion apparatus according to the present invention will be described below with reference to FIG. 1 using a petroleum fan heater as an example. Fig. 2 shows the oil supply route of the oil fan heater.
Since the configuration is the same as that of the conventional example described above, the description thereof will be omitted, and the configuration of the oil pan portion related to the present invention will be described with reference to FIG. 1. In FIG. 1, the same parts as those in FIG.

In FIG. 1, reference numeral 7 is a tank receiver, and a protrusion 7 is fitted in the central portion of the tank receptacle 11 for fitting with an oil outlet portion of an oil supply tank base 11.
a. Reference numeral 8 denotes a tank for lifting the refueling tank 1 when an oil level rise is detected, and 9 is a solenoid valve for moving the tank support 8.

A float sensor 22 is used to detect the oil level, and 22a is a normal oil level detection reed switch.
Reference numeral b is a reed switch for detecting an abnormal oil level, and reference numeral 22c is a float with a magnet for operating the reed switch. The signal from the float sensor 22 enters the control circuit 30,
The solenoid valve 9 and the display device 40 are controlled by the output of the control circuit 30.

During the normal operation of the oil fan heater as described above, each component and the oil surface are in a broken line state in FIG. And
If gasoline or the like other than the regular fuel is used, the refueling tank 1 is heated by combustion heat, the internal pressure of the refueling tank 1 rises, the fuel flows out from the refueling tank 1 to the oil pan 2, and the oil level rises. .

Float sensor 2 mounted on the oil pan 2
2 has a reed switch 22 for warning of low oil level (running out of oil)
a, a reed switch 22b for warning the increase in oil amount (excess oil) is built in, and the reed switch 22d operates when the float 22c rises due to the rise of the oil level. Then, the signal is input to the control circuit 30, and an output signal is output to the solenoid valve 9 by a microcomputer or the like.

The solenoid valve 9 is normally OFF and the tank support 8 is lowered. However, when an output signal is output from the control circuit 30, the solenoid valve 9 is turned ON and the tank support 8 is pulled up around the fulcrum 23. The refueling tank 1 on the tank support 8 is lifted at the same time as the tank support 8, and the refueling tank base 11 and the protrusion 7a of the tank receiver 7 are separated from each other,
The oil outlet of the fuel tank cap 11 is closed, and the oil level rise stops. Each component and oil surface are in the solid line state in FIG.

On the other hand, when the operation signal of the reed switch 22d is input to the control circuit 30, an output signal is also output to the display device 40. The display device 40 displays the display and stops the combustion, prevents ignition of erroneous fuel such as gasoline, and issues a warning to the user that the oil level in the oil pan 2 is abnormally elevated. It can contribute to the improvement of stability.

The mechanism for lifting the refueling tank 1 is not limited to this example. Further, since the oil fan heater is normally provided with an oil shortage warning display corresponding to the signal of the reed switch 22a, the above oil level rise warning display may be performed by using this indicator.

[0020]

As described above, according to the present invention, since the oil tank is lifted to block the oil inflow from the oil tank to the oil pan, the oil level rise can be reliably stopped and the oil level rise can be prevented. Since it is possible to display the abnormality on the display device on the front of the device, it is possible to provide the user with an opportunity to check the fuel and obtain a liquid fuel combustion apparatus with excellent safety.

[Brief description of drawings]

FIG. 1 is a schematic configuration explanatory diagram of a main part showing an embodiment of a liquid fuel combustion apparatus of the present invention.

FIG. 2 is an explanatory diagram of an oil feeding path of a conventional liquid fuel combustion apparatus.

FIG. 3 is an explanatory diagram of gasoline determination of a conventional liquid fuel combustion device.

[Explanation of symbols]

 1 Refueling tank 2 Tank support 9 Solenoid valve 22 Float sensor 30 Control circuit 40 Display device

Claims (2)

[Claims] 1. An oil supply tank for supplying liquid fuel, an oil receiving tray for temporarily storing the supplied liquid fuel, and a float sensor for detecting an oil level in the oil receiving tray. In the liquid fuel combustion device, when the oil level in the oil pan becomes higher than the oil level in normal use of the equipment, it is detected by the float sensor above and the refueling tank is lifted up to lift it from the refueling tank. A liquid fuel combustion apparatus comprising a shutoff means for shutting off oil supply to an oil pan. 2. An abnormality indicator is provided on the front of the device to control combustion and issue a warning when the oil level in the oil pan becomes higher than the oil level in normal use of the device. The liquid fuel combustion apparatus according to claim 1.