JPS58133508A - Liquid fuel combustion device - Google Patents

Abstract

PURPOSE:To reduce generation of offensive odor, smoke, carbon monoxide by supplying power at a highest value of supply power to an electric heater for a predetermined period of time upon starting the use of the titled device to preheat the fire dish and wick and starting ignition after lapse of a predetermined time from the preheating. CONSTITUTION:When a driving switch 21 becomes opened and charging to a capacitor 22 is started, the output of a comparator 23 becomes high for a predetermined period of time, and a transistor 24 is turned ''ON''. As a result, power is supplied to a relay 25, and a contact 25a is opened and a contact 25b is closed. Thus, an AC voltage is applied to the electric heater 12. When the fire dish is preheated for a predetermined period of time, and charging of a capacitor 22 is sufficiently carried out after the lapse of the predetermined time, the output of the comparator 23 becomes low, and the transistor 24 is turned OFF. As a result, the relay 25 is supplied with no power and the contact 25a is closed and the contact 25b is opened. Then, charging of a capacitor 28 is started, and the output of a comparator 29 becomes high for a predetermined period of time, while the contact 31a of a relay becomes closed and power is supplied to an igniter 32 to start the ignition.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a liquid fuel combustion device, and is intended to reduce odor, smoke, carbon oxide, etc. generated during ignition.

Fuel is an element that causes combustion in a combustion device.

Temperature and oxygen are necessary, but especially in the wick-type liquid fuel combustion equipment from Congpu, the fuel (vaporized gas) and temperature of these three elements were insufficient at the time of ignition to start combustion, so after ignition Until the combustion state stabilizes, the efficiency of converting the chemical energy possessed by the fuel into thermal energy decreases, and there is a problem in that incomplete combustion components are emitted as odor, smoke, carbon oxide, etc.

Therefore, in order to solve the above problem, an electric heater is installed near the lamp wick, and the heat of this electric heater is used to preheat the lamp wick for a certain period of time before combustion starts. I thought about helping with the temperature.

The present invention is particularly characterized by the control of this electric heater, and one embodiment of the invention will be described below, in which it is applied to a hot air heater.

In Figures 1 to 3, 1 is a fuel tank; tank 1
The liquid fuel 2 inside is sucked up by the capillary action of the cylindrical wick 3. This lamp wick 3 is linked to a lever 4 of a wick up/down mechanism, and is normally biased by the action of a spring 60 so that the upper part of the lamp wick 3 is positioned within the fuel tank 1. 6 is a solenoid that holds the lever 4 in a state in which the lamp wick 3 is pushed upward at the same time as the ignition operation; 7 is a cylindrical inner tube that penetrates inside the fuel tank 1; and 8 is the outer periphery of the inner tube 7. This is a cylindrical outer tube provided in the lamp, and the outer tube 8 and the inner tube 7 hold the lamp wick 3 in a vertically movable manner.

Reference numeral 9.10 denotes a fire pan integrally formed at the upper ends of the inner and outer cylinders 7 and 8, and the fire pan 1o provided on the outer cylinder 8 has a large number of ventilation holes 11 in its rising wall.

Reference numeral 12 denotes a ring-shaped electric heater fixed to the outer periphery of the stepped portion of the outer fire pan 1o by brazing or the like, and is for assisting the vaporization of the fuel from the lamp wick 3. As shown in FIG. 3, this electric heater 12 uses a temperature detection element 1 such as a thermistor to detect a temperature drop caused by an abnormal reduction in the amount of fuel vaporized.
3, and the electric heater 12 is energized based on the output thereof, and the amount of energization is increased. Again 14 is the inner and outer fire pan part 9.
, 1o, 16 is a cylindrical combustion chamber tube that covers the combustion chamber 14 and forms the combustion chamber 16 above it, and 17 is a disk-shaped plate mounted on the combustion chamber tube 16. The fan 18 is disposed through the ejector when the wind from the fan 17 passes between the disc-shaped plate 18 and the wind barrel 19.
Due to this effect, combustion exhaust gas is sucked and discharged as shown by the broken line arrow, mixed with this combustion exhaust gas to become warm air, and is blown out from the blower outlet 20.

Next, the operation of the circuit shown in FIG. 3 will be explained.

First, when the left end of the lever 4 is pushed down, the upper part of the lamp wick 3 is pushed out onto the fire pans 9 and 1o. Then, in conjunction with the lever 4, the operation switch 21 shown in FIG. 3 is closed, the electric circuit is energized, the solenoid 6 is energized, and the lever 4 is held as it is by its suction action. Next capacitor 2
2, charging is started, and the output of the comparator 23 is “H” for a certain period of time.
i J, the transistor 24 is rONJl, and the relay 25 is energized. And the normally closed contact 26a of the relay 25
is open and the normally open contact 25b is closed and the electric heater 12
AC voltage (maximum power) is applied to. And the fire plate part 9
, 1o for a certain period of time. When the capacitor 22 is sufficiently charged after a certain period of time has elapsed, the output of the comparator 23 becomes "L".
o'4, the transistor 24 is rOFFJL, the relay 26 is de-energized, the normally closed contact 25a is closed, and the normally open contact 2sb is open.

Then, the motor 27 for the blower fan 17 is energized, and t
* Charging of the capacitor 28 is started via the diode 26, the output of the comparator 29 becomes r Ht J for a certain period of time, the transistor 3o becomes 0NJL, the relay 31 is energized, and the normally open contact 31a of the relay 31 is closed. Then,
The ignition device 32 is energized and ignition is started. After a certain period of time has passed, when the capacitor 28 is sufficiently charged, the output of the comparator 29 becomes rLoJ, the relay 31 becomes de-energized, the normally open contact 31a opens, and the energization to the ignition device 32 is cut off, and the state changes from ignition to combustion. to move to.

Further, the electric heater 12 is energized by changing the conductivity of the thyristor 36 via the comparator 33 and the transistor 34 in response to a change in the resistance value of a detection element 13 such as a thermistor provided near the hot air outlet 2o. , half-wave stepless phase shift control.

As described above, according to the present invention, when the electric heater is started to be used, the highest value of energized power is supplied to the electric heater for a certain period of time to preheat the fire pan and the lamp wick, and ignition is started after a certain period of time. The vaporization of the fuel is promoted, the incomplete combustion state at the time of ignition rise is alleviated, and the amount of odor, smoke, carbon oxide, etc. generated can be significantly reduced.

In the embodiments described above, the time when the electric heater is energized is controlled by the timer circuit, but the energization time may be controlled by detecting the temperature of the fire pan or the like.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view of a liquid fuel combustion apparatus according to an embodiment of the present invention, FIG. 2 is an enlarged cross-sectional view of the main parts thereof, and FIG. 3 is an electric circuit diagram thereof. 1... Fuel tank 3... Light wick 7.
...Inner cylinder~8...Outer cylinder 9p10...
...Grill part%1211000. electric heater, 13,
,,,,,Temperature detection element, 23゜29,,,,,,Comparator (for timer circuit), 22, 28@@866m capacitor (for timer circuit), 25.3118001. Relay, 32, ignition heater. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
figure

Claims (2)

[Claims] (1) A lamp wick for sucking up fuel, inner and outer cylinders located inside and outside the lamp wick, and a fire pan formed at the upper end of the inner and outer cylinder, the fire pan on the side of the outer cylinder. A liquid fuel combustion device in which an electric heater is provided on the outer periphery of the unit, the preheating heater is energized for a certain period of time at the start of use, and is ignited after this certain period of time has elapsed. (2) The electric heater is configured to be energized at maximum power for a certain period of time at the start of use, and when ignited after a certain period of time has elapsed, the energized power is varied steplessly depending on the combustion state. The liquid fuel combustion device described.