JPH04244505A - Liquid fuel combustion device - Google Patents

Abstract

PURPOSE:To prevent a combustion device from leaking oil when it is slantingly installed and improve convenience of the device while reducing the troubles of oiling. CONSTITUTION:There are provided a first oil pan 16 for storing therein oil supplied to a combustion part 13, a first oiling tank 17 for splenishing oil to the oil pan 16, a second oil pan 18, a second oiling tank 19 for replenishing oil to the oil pan 18, oil carrier means 24 for carrying the oil in the second oil pan 18 to the first oil pan, oil amount detector means 32, 33 for detecting the amounts of the oils in the first and second oiling tanks 17, 19, a plurality of oil level detector means 22, 25 for detecting the oil levels in the first and second oil pans 16, 18, and a control device 35. The control device controls the oil carrier means 24 to permit the oiling tank containing the less amount of the oil to be wasted first.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to liquid fuel combustion devices such as oil fan heaters and oil stoves.

0002

[Prior Art] In this type of liquid fuel combustion device, a predetermined amount of oil is supplied from an oil supply tank to an oil pan, and a fuel pump such as an electromagnetic pump is used to supply oil from the oil pan to a combustion part such as a burner. By supplying , combustion is carried out in the combustion section. However, the capacity of the refueling tank (
3 to 5 liters) was small, so I had to refuel frequently.

[0003] Therefore, in the system disclosed in Japanese Utility Model Publication No. 46-5412, a fuel tank and an oil pan are provided on the left and right sides of the combustion section, and the heights of the oil outlet of the left and right fuel tanks are different. By setting this, even if one fuel tank becomes empty, fuel is supplied from the other fuel tank and combustion continues.

0004

[Problems to be Solved by the Invention] Such a liquid fuel combustion device has the advantage that combustion can be continued for a longer period of time compared to a device with one fuel tank and one oil pan, and the hassle of refueling can be reduced. be. However, since the left and right oil pans are always in communication, if the combustion device is installed at an angle, the oil in one oil pan will move to the other oil pan.
There was a concern that oil would leak.

[0005] Therefore, in recent years, a safe liquid fuel combustion device has been developed that does not cause oil leakage even when the combustion device is installed at an angle (the angle of inclination is within 10 degrees). This combustion device is shown in FIG. 6. When one oil tank 1 becomes empty and the oil in one oil pan 2 decreases, the oil transfer pump 3 is driven, and the oil is transferred from the other oil tank 4 to the other oil tank 4. The oil replenished in the saucer 5 is transferred to one of the oil receivers 2, and this transferred oil is transferred to the combustion section 7 by the fuel pump 6.
It is designed to be supplied to

[0006] In this case, only when the oil level in one oil pan 2 decreases and the float switch 8 is activated, oil is transferred from the other oil pan 5, so the combustion device is installed at an angle. Even if the oil in the other oil pan 5 is
There is no risk of oil leakage as it will not flow out.

By the way, in the conventional liquid fuel combustion apparatus shown in FIG. 6, the oil in one determined fuel tank 1 is always consumed first at any time. Therefore, even when the amount of oil in the other tank 4 is low, the oil in one tank 1 is consumed first, so when the amount of oil in the other tank 4 is low, the oil in one tank 1 is consumed first. Once the oil was empty, combustion could only continue for a short period of time, so this was a step forward in terms of usability.

The present invention has been made in view of the above-mentioned circumstances, and aims to prevent oil leakage when a combustion device is installed at an angle, and to further improve usability.

[0009]

[Means for Solving the Problems] The present invention provides a combustion section such as a burner, a first oil pan for storing oil to be supplied to the combustion section, and a first oil pan for replenishing oil to the first oil pan. a second oil tank, a second oil tank for replenishing oil to the second oil pan, and an oil transfer means for transferring oil from the second oil pan to the first oil pan. , a plurality of oil amount detection means for detecting oil amounts in the first and second oil supply tanks, respectively;
A plurality of oil level detection means for detecting the oil levels of the first and second oil pans, respectively, and signals from the oil amount detection means and the oil level detection means are inputted to the first and second oil supply tanks. Among these, the configuration includes a control device that controls the oil transfer means so as to preferentially consume oil in a fuel tank with a small amount of oil.

0010

[Operation] With this configuration, oil will continue to be supplied to the combustion section until the first and second fuel tanks are empty, making it possible to continue combustion for a long time and refueling frequently. It is not necessary, and the oil is transferred from the second oil pan to the first oil pan only when the oil transfer means for transferring the oil in the second oil pan to the first oil pan is in operation. Therefore, even if the combustion device is installed at an angle, there is no fear that the oil in one oil pan will flow into the other oil pan and cause an oil leak.

Furthermore, since the oil in the fuel tank with the least amount of oil is always consumed first, if the oil in one of the fuel tanks becomes empty, there is no chance that combustion will be able to continue for only a short period of time. , it becomes possible to refuel with sufficient margin, and it is possible to improve usability.

0012

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to a kerosene fan heater will be described below with reference to FIGS. 1 to 5.

In FIG. 1, reference numeral 11 denotes an exterior case having a hot air outlet (not shown) on the front surface, and inside this exterior case 11 there is a burner fan 12;
A vaporizing burner 13 to which combustion air is supplied from 2, a combustion tube 14 with an open top connected to the burner 13, an air guide device 15 facing the combustion tube 14, and a center back surface of the outer case 11. A hot air blower fan (see Fig. (not shown) is provided in the center, and a right oil pan 16 and a right oil tank 17, and a left oil pan 18 and a left oil tank 19 are provided on both sides thereof, respectively.

On the right oil pan 16 is a right oil tank 17.
However, the left oil tank 19 is removably placed on the left oil pan 18, and the oil outlet 17A of the right oil tank 17 is at a higher height than the oil outlet 19 of the left oil tank 19.
It is set 5 to 10 mm lower than A.

The right oil pan 16 is provided with a fuel pump 21 such as an electromagnetic pump that supplies oil (kerosene) in the right oil pan 16 to the burner 13 via an oil pipe 20. A right float switch 22 having an upper float 22A and a lower float 22B for detecting the upper and lower levels of the oil level in the saucer 16 is provided, and the lower end of the pumping pipe 21A of the fuel pump 21 is connected to the lower It faces near the inner bottom of the right oil pan 16, which is lower than the float 22B.

On the other hand, oil (kerosene) in the left oil pan 18 is supplied to the right oil pan 16 through a supply pipe 23.
An oil transfer pump 24 is installed to transfer oil to the oil tank, and a left float switch 25 is also provided.

Both oil pans 16 and 18 have receiving portions 26 and 27, respectively, and these receiving portions 26 and 27 have cap portions 28 and 29 of both oil supply tanks 17 and 19 having the oil outlet ports 17A and 19A, respectively. are inserted respectively, and these receiving parts 2
Oil outflow holes 30 and 31 are provided in the bottom walls of 6 and 27.

32 and 33 are both the oil supply tanks 17 and 19.
This is a weight sensor (oil amount detection means) that detects the weight (oil amount) of each.

FIG. 2 shows the control device 34 for the kerosene fan heater. In FIG. 2, 35 is a microcomputer (hereinafter referred to as microcomputer);
The operation switch 36 and the temperature control switch 3 are on the input side of the
7, 38, room temperature sensor 39, and frame rod 40
, the first reed switch 41 which is opened and closed by the upper float 22A of the right float switch 22, and the lower float 2
A second reed switch 42 opened and closed by the left float switch 25, a third reed switch 43 opened and closed by the left float switch 25, and weight sensors 32 and 33 are provided.

Further, on the output side of the microcomputer 35, there are a burner fan 12, an igniter 44, a fuel pump 21, an oil transfer pump 24, a vaporization heater 45 for heating the vaporizer of the burner 13, and an indicator 46. , a buzzer 47 are provided.

When the operation switch 36 is turned on, the microcomputer 35 heats the vaporizer of the burner 13 with the vaporization heater 45. When the carburetor is sufficiently heated, the burner fan 12 is operated to pre-purge the burner 13, and then the fuel pump 21 is operated and the igniter 44 is activated. As a result, when combustion occurs in the burner 13 and a flame detection signal is issued from the flame rod 40, the microcomputer 35 stops the igniter 44.

During the combustion operation, the microcomputer 35 calculates the difference in temperature between the set temperature adjusted by the temperature control switches 37 and 38 and the room temperature detected by the room temperature sensor 39, and adjusts the combustion amount according to the difference in temperature. is determined, and the frequency of the fuel pump 21 is controlled so that the combustion amount can be obtained, and the rotation speed of the burner fan 12 is controlled.

Further, the signals from the weight sensors 32 and 33 and the signals from the right float switch 22 and the left float switch 25 are input to the microcomputer 35, and as shown in FIGS. The fuel pump 21, oil transfer pump 24, indicator 46, and buzzer 47 are controlled as follows depending on the weight of the oil tank and the oil level in the oil pans 16 and 18.

That is, when the operation switch 36 is turned on,
The left and right weight sensors 32 and 33 are respectively connected to the fuel tank 1.
7 and 19 are detected, their detection signals are input to the microcomputer 35, and the microcomputer 35 compares the detection signals and determines which of the fuel tanks 17, 19 is lighter in weight. to judge.

Here, as shown in FIG. 3a, the weight of the right oil tank 17 is lighter than the left oil tank 19, and the oil level of the right oil pan 16 is equal to or higher than L1, and the oil level of the left oil pan 18 is lower than the oil level of the left oil pan 18. When the level is above L2, the oil in the right oil pan 16 is supplied to the burner 13 by the fuel pump 21 for combustion, and as shown in FIG. 3b, the oil in the right oil tank 17 is replenished to the right oil pan 16. The oil in the right fuel tank 17 gradually decreases.

After that, as shown in FIG. 3c, the oil in the right oil tank 17 becomes empty and the oil level in the right oil pan 16 drops to L.
1 or less, the lower float 2 of the right float switch 22
When the second reed switch 42 is turned on by 2B, the microcomputer 35 operates the oil transfer pump 24 to supply the oil in the left oil pan 18 to the right oil pan 16. As a result, the oil level in the right oil pan 16 rises to a level equal to or higher than L1, and the second
When the reed switch 42 is turned off, the microcomputer 35 stops the oil transfer pump 24.

In this way, when the right oil tank 17 is empty, the oil transfer pump 24 is operated intermittently depending on the oil level in the right oil pan 16, and the oil in the left oil pan 18 is transferred to the right oil pan 16. The oil in the left oil tank 19 is transferred to the left oil pan 1.
8, and the amount of oil in the left oil tank 19 gradually decreases.

As shown in FIG. 3d, the left oil tank 19 becomes empty and the left oil pan 18 is no longer refilled with oil, and the left oil pan 18 is filled with oil from the left oil pan 18 to the right oil pan 16. When the oil level of 18 becomes equal to or lower than L2,
The third reed switch 43 of the left float switch 25 is turned off, and the microcomputer 35 stops the oil transfer pump 24 to prevent the oil transfer pump 24 from sucking air.

In this state, both oil supply tanks 17 and 1
If the combustion continues for 15 to 20 minutes without oil being refilled in the right fuel tank 17, the oil level in the right fuel tank 17 will also drop below L1, and the second
When the second reed switch 42 is turned on and the third reed switch 43 is turned off, the microcomputer 35 turns on the display 46 and the buzzer 4.
7 is activated to notify that the fuel is out and to stop the operation of the kerosene fan heater.

On the other hand, as shown in FIG. 4a, if the weight of the left fuel tank 19 is lighter than the right fuel tank 17 and the oil level in the right oil pan is equal to or higher than L1, the fuel pump 21
becomes drivable. At this time, as shown in FIG. 4b, the oil level in the left oil pan 18 is equal to or higher than L2, and the right oil pan 1
6 is below L3, the first reed switch 41 is turned on by the upper float 22A of the right float switch 22, the microcomputer 35 operates the oil transfer pump 24, and the oil in the left oil pan 18 is transferred to the right side. The oil is supplied to the oil pan 16. Then, by operating the fuel pump 21, the oil in the right oil pan 16 is supplied to the burner 12, and combustion continues. As a result, when the oil level in the right oil pan 16 rises above L3 and the first reed switch 41 is turned off, the microcomputer 35 stops the oil transfer pump 24.

During this period, the oil level in the right oil pan 16 does not fall below the level L4 at the oil outlet 17A of the right oil tank 17, so air flows into the right oil tank 17 from the oil outlet 17A of the right oil tank 17. Therefore, the oil in the right oil supply tank 17 is not replenished into the right oil pan 16. In this way, when the oil level in the right oil pan 16 is above L4,
The microcomputer 35 operates the oil transfer pump 24 intermittently according to the oil level in the right oil pan 16, and as a result, the left oil pan 1
8 is supplied to the right oil pan 16, and the oil in the left oil tank 19 is replenished to the left oil pan 18, so the amount of oil in the left oil tank 19 gradually decreases.

After that, as shown in FIG. 4c, the left oil tank 19 becomes empty and the left oil pan 18 is no longer refilled with oil, and the left oil pan 18 is no longer supplied with oil, and oil is supplied from the left oil pan 18 to the right oil pan 16. When the oil level in the oil pan 18 becomes lower than L2, the third reed switch 43 of the left float switch 25 is activated.
is turned off, the microcomputer 35 stops the oil transfer pump 24, and prevents the oil transfer pump 24 from sucking air. Then, the oil in the right oil tank 17 is transferred to the right oil pan 16.
The fuel is refilled and combustion continues, and the amount of oil in the right fuel tank 17 gradually decreases.

Then, as shown in FIG. 4d, the oil in the right oil tank 17 becomes empty and the oil level in the right oil pan 16 drops to L.
When it becomes 1 or less, the second reed switch 42 is turned on by the lower float 22B of the right float switch 22, and the microcomputer 35 activates the display 46 and buzzer 47 to notify that the fuel is out, and also turns off the operation of the kerosene fan heater. make it stop.

According to this embodiment, a right oil pan 16 and a right oil tank 17 and a left oil pan 18 and a left oil tank 19 are separately provided on both sides of the burner 13, and fuel is supplied from the right oil pan 16 to the burner 13. While supplying fuel by the pump 21,
Since the oil in the left oil pan 18 is supplied to the right oil pan 16 by the oil transfer pump 24, combustion can be continued until both tanks 17 and 19 are empty, eliminating the trouble of frequent refueling. Not only is it easy to use, but the oil in the left oil pan 18 is supplied to the right oil pan 16 only when the oil transfer pump 24 is operating, so even if the oil fan heater is installed at an angle. However, the oil in one oil pan does not move to the other oil pan and cause oil leakage, making it highly safe.

In addition, the right fuel tank 17 and the left fuel tank 1
Detection signals from the weight sensors 32 and 33 that respectively detect the weight of oil pans 9 and 9, detection signals from the right float switch 22 which detects the oil level in the right oil pan 16, and detection signals from the left float switch 25 which detects the oil level in the left oil pan. A signal is input to the microcomputer 35 so that the oil in the lighter fuel tank between the right fuel tank 17 and the left fuel tank 19 will be consumed first.
Since the operation of the oil transfer pump 24 is controlled by the microcomputer 35, there is no problem where combustion can only be continued for a short time when one of the oil tanks becomes empty, unlike in the conventional case. This makes it possible to refuel with plenty of time, further improving usability.

In the above embodiment, the right fuel tank 17
Although the weight sensors 32 and 33 were used to detect the amount of oil in the left oil tank 19, the present invention is not limited to this. The weight of the fuel tank including the oil pan may be detected.

[0037]

[Effects of the Invention] Since the present invention is constructed as described above, combustion can be continued until the plurality of refueling tanks are emptied one after another, reducing the frequency of refueling and improving usability. Not only is this possible, but even if the device is installed at an angle, it is possible to prevent oil from moving from one oil pan to the other, eliminating the risk of oil leakage and increasing safety. In addition, among multiple fuel tanks, the oil in the tank with the least amount of oil is always consumed first, so if one tank becomes empty, combustion can only continue for a short time. There is no need to worry about
This allows for sufficient refueling at all times, further improving usability.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of the internal structure of a kerosene fan heater.

FIG. 2 is a block diagram of a control device for a kerosene fan heater.

FIG. 3 is an explanatory diagram showing changes in the oil amount in the oil pan and the oil tank when the oil amount in the right oil tank is smaller than the oil amount in the left oil tank.

FIG. 4 is an explanatory diagram showing changes in the oil amount in the oil pan and the oil tank when the oil amount in the left oil tank is smaller than the oil amount in the right oil tank.

FIG. 5 is a flowchart for explaining the operation of the control device.

FIG. 6 is an explanatory diagram of the internal structure of a conventional oil fan heater.

[Explanation of symbols]

13 Burner (combustion part) 16 Right oil pan (first oil pan) 17 Right oil tank (first oil tank) 18 Left oil pan (second oil pan) 19 Left oil tank (second oil tank) 22 Right float switch (oil level detection means) 24 Oil transfer pump (oil transfer means) 25 Left float switch (oil level detection means) 32
Weight sensor (oil amount detection means) 33 Weight sensor (
Oil amount detection means) 35 Microcomputer (control device)

Claims (1)

[Claims] Claim 1: A combustion part such as a burner, a first oil pan for storing oil to be supplied to the combustion part, a first oil tank for replenishing oil to the first oil pan, and a second oil tank for replenishing oil to the first oil pan. oil pan and
a second oil supply tank that supplies oil to the second oil pan;
an oil transfer means for transferring the oil in the second oil pan to the first oil pan; a plurality of oil quantity detection means for detecting the oil quantities in the first and second oil supply tanks; a plurality of oil level detection means each detecting the oil level of the second oil pan, inputting signals from the oil amount detection means and the oil level detection means;
A liquid fuel combustion device comprising: a control device that controls the oil transfer means so as to preferentially consume oil in a fuel tank with a small amount of oil among the first and second fuel tanks. .