JPH0561528B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an oil-burning appliance using a cartridge tank.

BACKGROUND OF THE INVENTION In general, this type of oil-burning appliance is designed to supply oil by attaching and removing a cartridge tank from the appliance body. And the cartridge tank is the fifth one.
As shown in the figure, a movable valve 32 is provided at the center of the fuel filler port 31, and the movable valve 32 is pressed against a valve seat 34 by a spring 33. Therefore, when the tank is moved, the fuel filler port 31 is sealed and kerosene does not leak outside. When installed in the main body 35, there is a protrusion 38 on the oil supply part 37 of the main body tank 36, and when the cartridge tank 39 is installed, the movable valve 32 is pushed by this protrusion 38, and the inside of the main body tank 36 and the cartridge are pushed. The inside of the storage tank 39 is electrically connected. Therefore, the cartridge tank 3
The kerosene inside 9 is supplied to the oil supply part 37 of the tank 36 on the main body side.
kerosene level and is maintained at this level.

When the amount of kerosene decreases, the user removes the cap 31a with the fuel filler port 31 facing up, fills it with kerosene, tightens the cap 31a again by hand, moves it by holding the opposite handle, and attaches it to the appliance body 35. In this case, if there is still sufficient kerosene remaining inside the main body side tank 36, the appliance main body 35 continues to burn normally.

Problems to be Solved by the Invention However, in such a conventional configuration, when the cap 31a is manually tightened to the fuel filler port 31, there is no problem if the fit is sufficient, but the cap 31a
When trying to attach the cap 31a to the device main body 35 by tilting it slightly and moving it by the handle while still fitting it into the fuel filler port 31, if the cap 31a hits somewhere on the device main body 35, the cap 31a will be removed by the shock.
1a may come off from the fuel filler port 31 and kerosene may splash onto the burning appliance body 35, causing a fire.

Cap 31 is sufficient to prevent this kind of thing.
The most important thing is to screw the a into the fuel filler port 31, but in any case, it must be done manually, and it must be considered that even if you intend to screw it in, it may not be sufficient.

The present invention was made in view of these points.
Safety is enhanced by automatically extinguishing the fire when the cartridge tank is removed, and by preventing re-burning after removing the cartridge tank unless the operation switch is turned off and then turned on again.

Means for Solving the Problems In order to achieve the above object, the present invention includes a tank detection section that detects attachment/detachment of a cartridge tank, and a tank detection section that stops combustion based on a tank detachment signal from the tank detection section and after turning off the operation switch. The configuration includes a combustion control section that starts combustion only when the engine is restarted.

Effects The present invention has the above-mentioned configuration, so that combustion stops when the cartridge tank is removed, and in order to re-combust after removing the cartridge tank, the operation switch must be turned OFF once and then turned on again. Just by setting the tank back to its original position, combustion will automatically restart, which eliminates the imperfection of starting fire regardless of the user's will.

Embodiments Below, embodiments of the present invention will be described with reference to the drawings. In FIG. 1, 1 is a device body, 2 is a combustion section provided in the device body 1, and fuel is supplied from a tank 3 via an electromagnetic pump 4. At the same time, combustion air is supplied from the combustion fan 5 through the pipe 6. Reference numeral 7 represents a fan for supplying hot air, and reference numeral 8 represents a cartridge tank for replenishing fuel to the tank 3, which has the same structure as that described in the conventional example and is removable. Reference numeral 9 denotes a switch for detecting attachment/detachment of the cartridge tank 8, which sends an off signal to the tank detection section 10 to detect detachment of the cartridge tank 8. 11 stops the combustion in response to the tank separation signal _S1 from the tank detection section 10, and controls the operation switch 12 for re-burning after the combustion stops.
This is a combustion control section that can only be activated after being turned off and then turned on again.

FIG. 2 shows an example of a specific control circuit for the above-mentioned combustion appliance, where 14 is a power plug, 15 is a combustion control circuit connected to the power plug 14, and is mainly composed of a microcomputer (hereinafter referred to as a microcomputer). There is. 16 is an AC load such as an electromagnetic pump connected via the operation switch 12, and 17 is a second AC load such as the combustion fan 5 and hot air supply fan 7 directly connected to the power plug 14, both of which are part of the combustion control circuit. It is designed to be controlled based on signals from 15. 19 is a driving switch 12, a resistance 20
A photocoupler connected to the power plug 14 via the combustion control circuit 15 turns on the operation switch 12.
It is something to convey to.

FIG. 3 shows the combustion control circuit 15, in which 21 is a DC power supply, 22 is a one-chip microcomputer having a CPU, ROM, RAM, and an input/output section, which controls combustion according to a predetermined program. A tank detection unit 10 and the like are incorporated therein. This microcomputer 22 is the photocoupler 1 mentioned above.
The output from the switch 9 is connected to be inputted through the transistor 19a, and the switch 9 for detecting the attachment/detachment of the cartridge tank described above is turned ON-.
An OFF signal is input, and detachment of the cartridge tank 8 is monitored.

Next, the operation of the combustion appliance constructed as described above will be explained using the flowchart shown in FIG. First, when the power plug 14 is inserted into a power outlet, an alternating current voltage is applied, and the combustion control circuit 15 starts operating centering on the microcomputer 22. And if the operation switch 12 is not turned on, it will remain like this,
When turned on, the microcomputer 2 is connected via the photocoupler 19.
A pulse signal is supplied to 2, and this is confirmed in step 24, and the microcomputer 22 shifts to a combustion sequence and performs combustion according to a normal combustion control program.

When the cartridge tank 8 is taken out in this state, the switch 9 is turned off and the tank detection section 10 detects this in step 25. Then, the combustion control section 11 detects an abnormality based on the tank detachment signal from the tank detection section 10, and repeats the step.
After passing through step 24, an abnormality is detected in step 26 and combustion is stopped.

In this state, the microcomputer 22 moves to step 27 and checks whether or not the operation switch 12 has changed from ON to OFF.
Detects whether it is turned off and turns the operation switch 12
If it turns OFF, the abnormality processing is canceled, and then it is monitored again in step 24 whether or not the operation switch 12 is turned ON.

At this point, when the cartridge tank 8 finishes refueling and is set again, the switch 9 is turned on, but steps 24→26→27 are simply repeated and combustion does not start.

If the operation switch 12 is turned on in this state, the operation as described above is performed and combustion is started.

Effects of the Invention As is clear from the above description of the embodiments, the present invention has the following features:
When the cartridge tank is removed, the fire will be extinguished automatically, and the operation switch must be operated to prevent reburning after the cartridge tank is removed.
The imperfections that occur when combustion starts with the cartridge tank set without the user's intention to do so are eliminated, and safety is dramatically improved.

[Brief explanation of the drawing]

Fig. 1 is a schematic configuration diagram of an oil combustion appliance according to an embodiment of the present invention, Fig. 2 is its circuit diagram, Fig. 3 is its combustion control circuit diagram, Fig. 4 is a flowchart for explaining the operation, and Fig. FIG. 5 is a sectional view showing a conventional example. 2... Combustion section, 3... Tank, 8... Cartridge tank, 9... Switch, 10... Tank detection section, 11... Combustion control section.

Claims (1)

[Claims] 1. A combustion section, a tank that supplies fuel to the combustion section, a removable cartridge tank that replenishes fuel to this tank, a tank detection section that detects attachment and detachment of the cartridge tank, and a tank detection section that detects the removal of the tank from the tank detection section. An oil combustion appliance consisting of a combustion control section that stops combustion based on a signal and starts combustion only when the operation switch is turned off and then turned on again.