JPS611920A - Combustion appliance control device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

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.

Conventional configuration and its problems 2..

A conventional combustion appliance, such as an oil fan heater, is surrounded by an outer device and a bottom plate 2, as shown in FIG. 1, and has a fixed oil tank 3.
, burner 4 is provided. Combustion Ganu A burned in the burner 4 is blown out as warm air C from the looper 7 together with indoor air B by the fan 6 installed in the blower motor 5.
Used for indoor heating. Figure 2 is attached to the fixed tank 3 shown in Figure 1. A movable tank 9 is placed above the oil filler port 8 of the fixed tank 3, and a float switch 10 for oil level detection is connected to the burner 4. The pump 11 that pumps oil is also included. FIG. 5 shows an example of a conventional control circuit employed in the above-mentioned combustion appliance, in which an AC power source 12 is connected through a power switch 13 and connected between both ends a and b of a control circuit 15 mainly composed of a microcomputer 14, a contact 16 and the above-mentioned control circuit. A series circuit with a sheathed heater 17 for vaporizing kerosene in the burner 4, a series-parallel circuit between the contact 18, the blower motor 5, and the burner motor 19 for supplying combustion air in the burner 4;
The contacts 20 are connected to the pump 11 and the series-parallel 3, <-7 circuits of the igniter 21 for igniting the vaporized kerosene in the burner 4, respectively. In addition to sensors such as the float switch 10, the control circuit 15 is also connected to a display panel 24 including a light emitting diode 22 that displays the operating status and operation status of the circuit, a numeric display tube 23 that displays the time, and a buzzer 26. has been done.

In such a configuration, by closing the operation switch 13, the control circuit 15 activates the contacts 16, 18, and 20 by the microcomputer 14 to burn kerosene in the burner 4, as shown in FIG. Generates a combustion flame. 2, while the oil remains in the movable tank 9, the oil level maintains the height A, but as the oil level in the fixed tank 3 gradually decreases, the float switch 10 When the float 25 goes down at the OFF point Bt, the signal is input to the microcomputer 14, and the refueling lamp 22a in the display panel 24 lights up. At the same time, a buzzer 26 is set to sound because there are cases where the light cannot be detected at the same time. Assume that the microcomputer 14 is designed to stop combustion in the burner one hour after the float 25 starts operating. For this reason, when in use, the amount of oil in the fixed tank is a constant amount,
For example, the system uses sound and light to notify you that you only have about one hour's worth of fuel left, but at this point the user considers whether to set a timer or use a little more time before stopping the burn. Note that the microcomputer 14 stops combustion after the float 25 issues an OFF signal when the oil level is at C in FIG. 2, which is higher than the height D of the oil inlet of the pump 11. It is. This is to prevent combustion from becoming unstable if the pump 11 runs out of oil and blows a mixture of oil and air into the room, causing unburned kerosene to mix into the combustion flame A and creating a bad odor. It has become. A similar situation tends to occur even when the combustion of a fan heater or the like is stopped, so we try to avoid stopping the combustion as much as possible.

In this way, in the past, people would forget that it had been a certain amount of time (for example, 1 hour) since the refueling light turned on and the buzzer sounded, or they would forget how long it had been, so they would automatically It had the disadvantage that it was difficult to know when to set the next timer, and even if the timer was set, it would only burn for a short time.

Purpose of the Invention The present invention was developed in view of the above-mentioned problems, and is aimed at making it possible to visually determine the amount of remaining oil so that the next operation can be carried out with plenty of time before combustion stops. be.

(Structure of the Invention) In order to achieve the above object, the present invention is structured so that the remaining time is displayed on a numerical display tube after the float switch is activated.

DESCRIPTION OF THE EMBODIMENTS The embodiments will be described below with reference to FIGS. 3 and 4. In the control circuit shown in FIG. 3, parts that are the same as those in the conventional example shown in FIG.

That is, FIG. 4 explains the display on the display tube when the oil level height reaches B in FIG. 2 and the float 25 issues an OFF signal, and then the microphone 67 and the time display tube 23 are operated. It is something. Normally, the time display tube 23 displays the time as shown at point a in FIG. All the signals are O, and the buzzer 26 also sounds. Next, at point 0 in the middle, the display tube 23 displays the elapsed time (for example, 33 minutes) since the lamp 22a was turned on, indicating that only 27 minutes remain. After one hour, the refueling lamp 22a goes out, the display tube 23 displays 60 minutes, and combustion 1 is stopped. Until the display tube 23 indicates 60 minutes, the oil level A is secured by removing the movable tank 9, refueling it, and setting it on the fan heater again, so the float 25 rises and closes the contact 25a. Then, the microcomputer 14 turns off the fuel lamp 22a, the display tube 23 automatically displays the original current time, and combustion continues.

In this way, in the present invention, the control circuit 15a is configured mainly by the microcomputer 14a. The operation of the oil in this circuit 7 vane is the same as that of the conventional example, so a description thereof will be omitted.

Effects of the Invention As is clear from the above embodiments, the present invention is effective when the refueling warning time is extended, and the elapsed time between when the refueling warning is issued and when combustion stops can be clearly seen. During that time, considering the usage time and purpose of use, it is easy to refuel, and for example, you can set a timer.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a combustion appliance implementing a conventional control circuit and the present invention control circuit, FIG. 2 is a sectional view of a tank portion, FIG. 3 is a control circuit diagram of a combustion appliance in an embodiment of the present invention, The figure is an explanatory diagram of the operation related to one embodiment of the present invention, and the fifth
The figure is a control circuit diagram of a conventional example. 3 fixed tank, 4-burner, 9/movable tank, 10
Float switch, 14 Microcomputer, 15 Control circuit, 2
2a refueling lamp, 2a time display tube, 26 buzzer. Figure 1 Figure 2

Claims (1)

[Claims] A tank that stores oil, a burner that supplies oil and burns it, a float switch that detects the oil level in the tank, a control circuit mainly based on a microcomputer that operates based on the signal from the float switch, and this control circuit. It has a numeric display that displays the time, and after the float switch detects that the oil level is at a certain place in the tank, the microcomputer measures the time and stops combustion after a certain period of time. . A control device for a combustion appliance, in which the measured time can be displayed on the numerical display.