JPS63315831A - Control device for fuel-burning equipment - Google Patents

Abstract

PURPOSE:To enable shortening of a time in which operation is started during the feed of oil, by a method wherein, through detection of the height of an oil level by means of an oil level sensor after preheating of a burner, combustion is started. CONSTITUTION:When a float switch 10 is actuated and is lowered to a level lower than that an oil level B during normal combustion, a kerosene run-out combustion continuance timer is started to count. When the kerosene run-out combustion continuance timer is timed up after lapse of a specified time, an oil level is lowered down to a point C, and combustion is stopped. By feeding kerosene to a stationary tank 3, an oil level is gradually raised from the point C, and with an operation switch 21 turned ON, preheating of a burner 4 is started. When the oil level in the stationary tank 3 is raised to a level higher than a point B, the float switch 10 is turned ON to perform normal combustion.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a control device for a combustion appliance such as a kerosene fan heater.

2. Description of the Related Art A conventional combustion appliance, such as a kerosene fan heater, has an external device, a fixed tank 3 and a burner 4 inside a bottom plate 2, as shown in FIG. Combustion gas A burned in the burner 4 is blown out together with room air B as warm air C from a looper 7 by a fan 6 attached to a blower motor 5, and is used to heat the room.

Figure 5 shows details of the fixed tank 3 in Figure 4.
A movable tank 9 is disposed at the oil filler port 8 of the fixed tank 3, and a float switch 10 for detecting the oil level is provided. A pump 11 for supplying oil to the burner 4 is attached.

FIG. 6 shows an example of a control circuit for this combustion appliance.
2 has a control circuit 131 and a contact 14 between both ends a and b.
and a heater 15 for vaporizing kerosene in the burner 4.
A series circuit with the contact 16 and the blower motor 5 for hot air, a series circuit with the burner motor 17 connected in parallel to this for supplying combustion air into the burner 4, and a series circuit with the contact 18 for supplying fuel to the burner. A series circuit with an electromagnetic pump 11 and an igniter 19 connected in parallel thereto and for igniting the kerosene vaporized in the burner 4 is connected, respectively. The control circuit 13 also includes a float switch 1 as an oil level sensor.
0, sensors such as a burner thermistor 20 for detecting the temperature of the burner 4, and an operation switch 21 are connected.

In such a configuration, by closing the operation switch 21, the control circuit 13 operates the contact 14 to energize the heater 15, and the burner thermistor 2o causes the temperature of the burner 4 to reach the temperature required to vaporize kerosene. After detecting that the burner motor 17
The blower motor 5 is rotated, and the electromagnetic pump 11 and igniter 19 are operated to burn kerosene in the burner 4.

During such combustion, as shown in Fig. 4, while oil remains in the movable tank 9, the oil level maintains the height A, but the oil level in the fixed tank 3 gradually increases. When the float 22 of the float switch 10 drops to the OFF point of the oil level B, that signal is input to the control circuit 13, and combustion is automatically stopped after a certain period of time. Then, when the movable tank 9 is filled with kerosene and the fixed tank 3 is refueled, the oil level in the fixed tank 3 gradually increases and when the float 22 of the float switch 10 rises to the ON point, the signal is activated. It is input to the circuit 131 and becomes ready for operation.

Problems to be Solved by the Invention However, during refueling, it takes time for the oil level to rise until the float switch 10 is turned ON again, and during that time, the control circuit 131 does not accept operation commands caused by closing the operation switch 21. However, there was a problem in that the user had to wait until the float switch 10 was turned on and then turn on the operation switch 21 in order to start operation.

The present invention solves this conventional problem by turning on the operation switch at the same time as oil replenishment after the oil has stopped running out.
The purpose of this system is to accept an operation command signal and be able to start operation immediately, and to accelerate the operation start ratio when replenishing oil.

Means for Solving the Problems In order to solve the above problems, the combustion appliance control device of the present invention receives a signal from an oil level sensor and sends an operation command signal even if the oil level check means is not turned on. In addition to preheating the burner, it is configured to check whether the oil level check means is turned on before operating the oil feeding pump after the preheating is completed.

Effect: With the above configuration, the present invention allows the operation switch to be turned on once after replenishing oil without waiting for the oil level check means to be turned on.
Simply preheat the burner, and after preheating is completed and before operating the pump, if the oil level check means is on, combustion will start as is, but if the oil level check means is off and there is no oil being supplied, combustion will start. It is safe because if there is, the operation will be stopped again.

Embodiments Hereinafter, embodiments of the present invention will be described with reference to the drawings. Parts that are the same as those in the conventional example will be denoted by the same reference numerals, detailed explanations will be omitted, and different parts will be mainly explained.

In FIGS. 1 and 2, the control circuit 13 includes a preheating control means 23 that controls the heater 15 that preheats the burner 4 when the operation switch 21 is turned on, and a float switch upon receiving a completion signal from the preheating control means 23. If the oil level is below 8 (predetermined value) based on the signal from 10, the operation will be stopped.
The oil level check means 24 is comprised of an oil level check means 24 which outputs a signal indicating that combustion is possible if it is equal to or higher than B, and a combustion control means 25 which operates the pump and controls combustion if the curved surface from this means 24 is equal to or higher than B. Next, the microcomputer t3af:! which forms the main body of the control circuit 13. It is configured to perform the sequence operations shown in the flowchart of FIG. In step S1, it is confirmed whether the operation switch 21 is 0N10FF, and if it is OFF, it waits in step S1, and the operation switch 21 is turned off.
If N, the process advances to step S2. In step S2, the contact 14 is closed. That is, the heater 15 is energized and the burner 4 is turned on.
Preheating is performed, and the process proceeds to step S3. In step S3, it is checked whether preheating is completed based on a signal from burner thermistor 20, and if preheating is completed, the process advances to step S4. In step S4, the contact 14 is opened and the heater 15 is set to 0.
FFj, complete preheating, close contact 16, and burner motor 1
7. Turn on the blower motor 5, perform pre-purge, and proceed to step 5.

In step S5, it is confirmed that the pre-purge is completed, and the process proceeds to step S6. In step S6, float switch 1
o is checked, and if it is ON, proceed to step S7,
Start combustion. If it is OFF, the process advances to step S12 and the operation is stopped. In step S7, the contact 18 is closed and the electromagnetic pump 11 and igniter 19 are turned on.The process then proceeds to step S8. In step S8, the operation switch 21 is set to 0N10 again.
The FF is confirmed, and if it is OFF, it is assumed that the operation has stopped and the process proceeds to step S12, and if it is ON, the process proceeds to step S9. In step S9, the float switch 1o is checked, and if it is ON, the process proceeds to step 511 to continue combustion. In step S11, an oil-out combustion continuation timer forming a part of the combustion control means 25 is initialized, and the process returns to step S8. If it is OFF, the process advances to step S10. In step S10, an oil-out combustion continuation timer is operated to check whether the time has expired or not. If the time has not expired yet, the process proceeds to step S8, and if the time has expired, the process proceeds to step S12 to stop the operation. In step 512, the contacts 16.18 are opened and the burner motor 17,
Set the blower motor 5, electromagnetic pump 11, and igniter 19 to 0FFI.
,, the operation is stopped and the process proceeds to step 513. Step 91
In step 3, the operation switch 21 is checked to be 0N10FF, and if it is ON, it waits in step S13, and if it is OFF, it advances to step S1 and returns to the start.

That is, during normal combustion, step S8 → step S9
→ Step S1-1 → Step s8 are repeated, but when the float switch 1o is activated and the oil level becomes below B in Figure 5, the oil-out combustion continuation timer starts counting, and after a certain period of time, the oil-out combustion continuation timer starts counting. When the time is up, the oil level reaches 0 point and the process proceeds to step S12 to stop combustion. Next, when the movable tank 9 is refueled and the fixed tank 3 is refilled, the oil level gradually increases from 0 point.Furthermore, when the operation switch 21 is turned from OFF to ON, this operation command signal is sent to the control circuit. accepts, step 8
13→Step S1→Step S2→Step S3, and preheating of the burner 4 is started. And step S3→
If the oil level in the fixed tank 3 reaches point B or higher between step S4 and step S5, that is, before the electromagnetic pump 11 is turned on, the float switch 10 is turned on and the process proceeds from step S5 to
Normal combustion is performed in the sequence of step S6→step S7→step S8. If the fixed tank 3 is not refilled with oil by the movable tank 9 and the fixed tank 3 is not refilled, the process goes from step S5 to step S6 to step 512 to step 913 and stops, and the oil level never exceeds the zero point.

Effects of the Invention As described above, according to the present invention, when restarting operation after running out of oil, the operation can be started immediately by simply turning on the operation switch once, without waiting for the oil level to rise due to replenishment oil and for the oil level check means to be turned on. It is easy to use and allows you to start operation. Even if the operation switch is turned ON without refueling, it is safe because the operation of the curved surface check means is checked before operating the fuel supply means such as the pump.

[Brief explanation of drawings]

Fig. 1 is a control circuit diagram of a combustion appliance showing one embodiment of the present invention, Fig. 2 is a configuration diagram of the main parts of the control circuit, Fig. 3 is a flowchart of the control circuit, and Fig. 4 is a control circuit diagram of a combustion appliance according to the present invention. A cross-sectional view showing a conventional combustion appliance; FIG. 5 is an enlarged cross-sectional view of the tank;
FIG. 6 is a control circuit diagram of a conventional combustion appliance. 3...Fixed tank, 4...Burner, 1
0...Float switch, 11...Pump (
fuel supply means), 13... control circuit, 23...
... preheating control means, 24 ... oil level checking means,
25... Combustion control means. lθ-70-Tosuite l5-ill Sakai Concave 13a, -1 Migro Computer No. l Figure 21- Luck-Beiun Switcher Figure 3 Figure 4 Figure 5 Figure 6

Claims (1)

[Claims] A tank that stores oil, a fuel supply means such as a pump that supplies oil, a burner that vaporizes and burns the oil supplied by the fuel supply means, and an oil level sensor that detects the height of the oil level in the tank. and a control circuit that preheats the burner and controls the pump etc. based on the signal from the oil level sensor, and the control circuit is configured to control when the oil level level in the tank is determined by the oil level sensor. Combustion control means detects that the combustion time is below a predetermined value, measures the combustion time, continues combustion for a certain period of time, then stops combustion, and receives an operation command signal when restarting, and a combustion control means that receives an operation command signal when restarting. a preheating control means for preheating the burner; and after receiving a preheating completion signal from the means and detecting that the oil level is above a predetermined value in the tank based on a signal from the oil level sensor. A combustion appliance control device consisting of an oil level check means that operates a pump, etc.