JPS58160733A - Wick type oil burner - Google Patents

Abstract

PURPOSE:To decrease occurrence of transient phenomenon in which fuel and air become excessive by maintaining the titled heater temporarily for a certain time in a middle combustion region when the combustion quantity is abruptly changed from the maximum combustion to the minimum combustion or from the minimum combustion to the maximum combustion. CONSTITUTION:When the titled heater is ignited, the fuel 2 contained in a wick 3 burns. At the same time, a fan 17 rotates, and wind is blown downward along a blast guide 32, and mixed with a combustion gas and blown off from a blow- off port 20. The combustion is carried out at air-holes 10 and 14, and the evaporation of the fuel is continued by the heat from flame formed at the air-hole parts, the combustion being further continued by maintaining a predetermined combustion quantity. Here, in a case where the maximum combustion is changed over from the maximum combustion to the minimum combustion or from the minimum combustion to the maximum combustion, when the middle combustion is held temporarily for a certain period of time, the quantitive balance between the fuel and air is lost, and occurrence of abnormal combustion due to a transient excess of fuel or air is reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an air leading type wick type oil hot air combustion machine in which the amount of combustion changes depending on the amount of air supplied.

In general, in this type of combustor, when there is a sudden change from maximum combustion to minimum combustion or from minimum combustion to maximum combustion, the quantitative balance between air and fuel in the burner section tends to be temporarily disrupted, and in the former case, the amount of vaporized On the other hand, there were concerns that the sudden decrease in air volume would result in an excess of fuel, causing temporary combustion with yellow flame and soot, and raising the temperature of the appliance itself, causing damage to the vessel. In addition, in the latter case, the amount of air increases rapidly relative to the amount of vaporization, so there is concern that there will be too much air, resulting in temporary odor and generation of carbon oxide.The present invention eliminates these problems. When the combustion amount is suddenly changed from maximum combustion to minimum combustion or from minimum combustion to maximum combustion, the engine is temporarily held in the intermediate combustion range for a certain period of time to minimize the transient phenomenon of excessive fuel and air. It eliminates negative effects.

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

1 is a fuel tank, and fuel 2 in the tank is sucked up by a lamp wick 3 by capillary action. The lamp wick 3 is movable up and down, and is in the upper position during normal combustion, with its tip protruding into the combustion chamber as a vaporizer. Reference numeral 4 denotes a wick guide tube erected so as to penetrate the inside of the tank 1, and 5 a wick outer tube provided on the outer periphery of the wick guide tube 4. The wick 3 is moved vertically by the wick guide tube 4 and the wick outer tube 6. It is held freely. 6 and 7 are the core guide tubes 4. A fire pan integrally formed at the upper end of the core outer cylinder 5,
A fire pan 7 provided in the outer cylinder 6 has a large number of ventilation holes 8 in its rising wall. Reference numeral 9 denotes a cylindrical inner flame tube placed on the fire pan 6 of the core guide tube 4, which has a plurality of combustion holes 1o, a burner partition plate 11, a flame expansion plate 12, and has a plurality of combustion holes facing each other. 1
There is a cylindrical outer flame tube 13 with 4 cylinders forming a combustion chamber therebetween. Reference numeral 15 denotes an outer cylinder that is provided so as to surround the inner flame cylinder 9 and the outer flame cylinder 13. 16Vi is a cylindrical combustion tube that covers the outer tube 15 and forms a secondary combustion chamber B above it; 17 is a fan disposed on the combustion tube 16 via a disc-shaped partition plate 18; When the wind from 17 passes through the partition plate 18 and the wind cylinder 19, the ejector effect sucks and discharges the combustion gas as shown by the dashed arrow, and mixes with this combustion gas to form warm air, which is then sent to the air outlet. Blows out from 2o.

At the time of combustion, the eze-lid effect changes depending on the air volume of the fan 17, and the combustion amount changes accordingly. Also, in FIG. 3, when the switch 21 or 23 is turned on, it is temporarily connected to the intermediate tap 27 of the fan 17, but the timer 29.30 is turned on.
The relay 24 or jd25 is switched by the fan 1.
70 is connected to the strong tap 26 or the weak tap 28. Also, when the switch 22 is turned on, it is connected to the intermediate tap 27 of the fan 17. 31 is a safety device installed in the middle of the hot air path, which opens the electrical circuit of the appliance and stops operation if the hot air temperature becomes abnormally high.

Next, the operation of the above-mentioned structure will be explained. First, when the lamp wick 3 is ignited with an igniter with its upper part protruding into the combustion chamber, the fuel 2 contained in the lamp wick 3 is combusted. At the same time, the fan 17 rotates, and the air is blown downward along the blower guide 32, mixed with the combustion gas, and blown out from the blower outlet 2o.

In addition, the above combustion is performed using the inner flame cylinder 9. Pores 10.14 of outer flame tube 13
The heat from the flame formed in the pores continues to vaporize the fuel, maintaining a constant amount of vaporization and continuing combustion. At this time, if the rotation speed of the fan 170 is changed, the ejector effect is reduced, and the amount of combustion gas sucked and discharged is reduced. Therefore, when the airflow flowing through the vaporizing section of the lamp wick 3 decreases, the amount of vaporization decreases accordingly.

If you switch from maximum combustion to minimum combustion, the quantitative balance between air and fuel in the burner section will be temporarily disrupted, and the amount of air will rapidly decrease compared to the amount of vaporization, resulting in excessive combustion, resulting in temporary yellow flame. or soot, causing combustion, raising the temperature of the appliance itself,
For example, a problem noise occurs when the safety device 33 is moved erroneously.

In addition, when switching from minimum combustion to maximum combustion (the quantitative balance between air and fuel in the burner section is temporarily disrupted), the amount of air increases rapidly relative to the amount of vaporization, resulting in an excessive amount of air, which temporarily causes an odor. This causes problems such as generation of carbon oxides and -carbon oxides.

Therefore, in this embodiment, when switching from maximum combustion to minimum combustion or from minimum combustion to maximum combustion, if the intermediate combustion is temporarily held for a period of time (for example, 1 minute), the quantitative balance of air and fuel is Mn, and the transitional fuel The occurrence of abnormal combustion due to excess or excessive air has been reduced to less than μ, and the appliance can be used without worrying about yellow flame, combustion with soot, malfunction of safety devices, or the generation of odors or carbon monoxide. .

As described above, according to the present invention, the transient phenomena that occur when switching the combustion amount can be suppressed to less than the conventional level A, and the present invention can be used without fear of adverse effects caused by transient phenomena.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view of a light wick type warm air heater according to an embodiment of the present invention, FIG. 2 is a cross-sectional view of the main part thereof, and FIG. 3 is a circuit diagram thereof. 1... Tank, 2... River/Fuel, 3... River/Light wick, 4... Core guide tube, 5... Core outer tube,
9... Inner flame tube, 13... Outer flame tube, 16
...Outer cylinder, 16... mark, combustion tube, 17...
...Fan, 18.River...Partition plate, 2o...Blowout outlet, 33...Safety device. Name of agent: Patent attorney Toshio Nakao (1st person)
Figure 4゛゛゛゛゛〉 Second cause

Claims (2)

[Claims] (1) A lamp wick installed in the inner and outer wick guide tubes so that it can move up and down. A nozzle consisting of an inner flame tube with a plurality of pores provided at the top of the wick and an outer tube surrounding them is equipped with a blower means for supplying combustion air to the burner. The combustion amount is changed by varying the amount of air supplied, and the intermediate combustion is temporarily maintained for a certain period of time during a transition period when the combustion is abruptly changed from maximum combustion to minimum combustion or from minimum combustion to maximum combustion. A wick-type oil-burning machine. (2) Combustion amount variable: maximum combustion, intermediate combustion, minimum combustion
A wick-type oil-burning machine according to claim 1, which is a staged smoke burning machine.