JPH0350167B2 - - Google Patents

Description

Detailed Description of the Invention (Industrial Application Field) The present invention relates to a liquid fuel combustion device used in a heater, and in particular to a combustion device that converts liquid fuel into vaporized gas using a vaporization device equipped with an electric heater and combusts the vaporized gas. Regarding.

(Prior art) Methods of burning liquid fuel such as kerosene for the purpose of heating include those that use a lamp wick, those that spray liquid fuel in the form of a mist from a nozzle and burn it, and those that burn liquid fuel by heating it to a high temperature. There are some known devices that combust vaporized gas. Among these, methods that burn vaporized gas are widely used in indoor open-air heaters because the particles of vaporized gas are fine, the temperature is high, and it easily reacts with the combustion air, resulting in complete combustion. This is where I am.

However, such a gasification combustion method is not convenient to use because it takes a long preheating time. That is, in order to gasify liquid fuel, the temperature of the vaporizer must be high, so the start-up operation is performed,
After power is supplied to the electric heater provided in the vaporizer, combustion generally does not occur for several minutes.

(Problems to be Solved by the Invention) In view of the above-mentioned circumstances, the present invention aims to provide a liquid fuel combustion device that can shorten the preheating time and improve the usability of the heater.

(Means for Solving the Problems) In order to achieve the above object, the liquid fuel combustion device of the present invention includes an operation switch, a central control circuit, and a heater control circuit, and heats the vaporization device with an electric heater. In a liquid fuel combustion device that reaches a predetermined temperature and burns the vaporized gas obtained by flowing the liquid fuel into the vaporizer in a burner, the device operates simultaneously with the operation of the operation switch to keep the vaporizer at a temperature lower than the predetermined temperature. It is provided with a vaporizer heat-retaining means for maintaining the temperature, and a timer means for stopping the operation of the vaporizer heat-retaining means after a certain period of time.

(Example) Hereinafter, an example of the present invention will be described using a heating machine shown in the drawings.

In the figure, 1 is the exterior of the heater. Exterior 1
An operating switch 2 is provided at a suitable location connected to a central control circuit 3 that executes various controls such as combustion control. 4 is a vaporizer heat-retaining means for keeping the temperature of the vaporizer 6 detected by the temperature sensor 5 at a temperature lower than a predetermined temperature during operation, and 7 is for supplying electric power to the electric heater 8 provided in the vaporizer 6. In the heater control circuit 9, a timer means starts counting at the same time as the operation switch 2 is operated. The pump 1 is connected to the vaporizer 6.
0 is provided, and the lower end suction portion of the pump 10 is immersed in liquid fuel in an oil tank 11. A nozzle 13 that opens when the needle valve 12 is removed is formed at the tip of the vaporizer 7, and a burner 14 is disposed at a position facing the nozzle 13.

Note that 15 is a spark plug, and 16 is a solenoid that operates the needle valve 12.

In the above configuration, when the operation switch 2 is turned on, for example, the central control circuit 3 detects this and activates the heater control circuit 7. As a result, the electric heater 8 is supplied with electric power and generates heat, so that the temperature of the vaporizer 6 gradually increases. The temperature of the vaporizer 6 is constantly detected by the temperature sensor 5 and sent to the central control circuit 3. Thereafter, when the temperature of the vaporizer 6 reaches a predetermined temperature sufficient to vaporize the liquid fuel after several minutes of preheating time, the central control circuit 3 operates the pump 10, solenoid 16, spark plug 15, etc. . That is, liquid fuel is fed under pressure to the vaporizer 6, the needle valve 12 operates, the nozzle 13 opens, and high-pressure discharge occurs between the spark plug 15 and the burner 14.
The vaporized gas ejected from the burner 14 flows into the burner 14 and starts combustion.

When the operation switch 2 is turned off during this combustion, the timer means 9 starts counting in conjunction with this or by a signal output from the central control circuit 3. Furthermore, as the burner 14 is extinguished by stopping the pump 10 and closing the nozzle 13, the heater control circuit 7 is also stopped and electricity to the electric heater 8 is cut off, so that the temperature of the vaporizer 6 gradually decreases. And central control circuit 3
However, when it is detected that the temperature of the vaporizer 6 has reached the heat retention temperature, the vaporizer heat retention means 4 is activated, and the heater control circuit 7 turns on and off the electricity to the electric heater 8 as appropriate, or turns on or off the power to the electric heater 8 as appropriate. It operates to continuously supply a small amount of power. Therefore, from now on, the temperature of the vaporizer 6 will be maintained at approximately the insulating temperature.

Then, when the operation switch 2 is turned on during the heat retention, the vaporizer heat retention means 4 stops, and ignition and combustion occur in the order described above, but since the vaporizer 6 is kept warm, the preheating time is significantly longer. shortened to
Since combustion occurs quickly, the heater is easy to use.

On the other hand, when the heat retention continues and the count of the timer means 9 reaches a certain time, the central control circuit 3 stops the operation of the vaporizer heat retention means 4. As a result, the heater control circuit 7 is also stopped and the power supply to the electric heater 8 is cut off, so that heat retention will not continue unnecessarily from now on, and power consumption can be effectively suppressed.

(Effects of the Invention) As explained above, the liquid fuel combustion device of the present invention includes a vaporizer heat-retaining means that operates at the same time as the operation switch is operated to keep the vaporizer at a heat-retaining temperature lower than the predetermined temperature, and Since it has a timer means that stops the operation of the heat retaining means after a certain period of time, if the operation switch is operated within a certain period of time after extinguishing, the preheating time is short and the hassle of waiting for ignition is reduced. The usability of the heater is improved, and furthermore, since the timer means limits the heat retention operation of the vaporizer to a certain period of time, it has the effect of effectively suppressing power wastage.

[Brief explanation of drawings]

FIG. 1 is a configuration diagram of a liquid fuel combustion apparatus according to an embodiment of the present invention. 2... Operation switch, 3... Central control circuit, 4
. . . vaporizer heat retention means, 7 . . . heater control circuit, 9 . . . timer means.

Claims (1)

[Claims] 1 A liquid that is equipped with an operation switch, a central control circuit, and a heater control circuit, heats the vaporizer with an electric heater to reach a predetermined temperature, and burns the vaporized gas obtained by flowing liquid fuel into the vaporizer with a burner. The fuel combustion apparatus is provided with a vaporizer heat-retaining means that operates simultaneously with the operation of the operation switch to maintain the vaporizer at a temperature lower than the predetermined temperature, and a timer means that stops the operation of the vaporizer heat-retaining means after a certain period of time. A liquid fuel combustion device characterized by: