JPH01312325A - Control device for combustion device - Google Patents

Abstract

PURPOSE:To keep a safety and improve a convenience in use by a method wherein when a remained amount of combustion is less than a predetermined value and a combustion calorie is high, a timer time is set to a little shorter, and in turn when an amount of combustion calorie is low, the timer time is set to show a little longer time. CONSTITUTION:A timer 15 is set by a signal from a second remained oil volume switch 7 generated when an oil surface of an oil reservoir tank 8 is slightly decreased. Simultaneously, in case that a combustion calorie at that time is higher than a predetermined value, it is set to a timer time TS (for example, 12 minutes) and in turn when it is lower than a predetermined value, a timer time is set to a value TL (for example, 15 minutes) longer than TS. As a timer 15 counts up, its signal is sent to a combustion amount control part 13 and a display control part 14, the combustion is terminated and at the same time an illumination is displayed at a displaying unit 12. With the foregoing arrangement, if the remained amount of oil is reduced, the combustion is terminated after a suitable period of time corresponding to a load elapses, and then a convenience in use can be improved while its safety characteristic is being kept.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application This invention relates to a control device for a combustor such as a hot-air heater, a stove, or a water heater that burns kerosene, gas, or the like.

(b) Conventional technology Conventionally, as a control device for this type of combustor, the
As disclosed in Publication No. 55010, when the remaining fuel amount detection section detects that the remaining amount of fuel is below a predetermined value, the timer is prevented from operating, and when the timer counts a certain period of time, combustion is started. It is known what caused it to be stopped.

(c) Problems to be Solved by the Invention However, in the above-mentioned control device, regardless of the amount of combustion in the combustion section, combustion is always stopped after a certain period of time from when the remaining amount of fuel falls below a predetermined value. Therefore, there was a problem in that combustion was stopped earlier than necessary when the amount of combustion was small.

This invention was made in view of the above facts,
The purpose is to stop combustion after an appropriate amount of time when the remaining amount of fuel is low, and to improve usability while maintaining safety.

(D) Means for Solving the Problems This invention includes a combustion amount control section that adjusts the combustion amount of the combustion section according to the load, and a combustion amount control section that detects when the remaining amount of fuel is below a predetermined value and outputs a signal. When a signal is output from the remaining fuel amount detection section, a timer time is set according to the amount of combustion, and a timer that counts the time is provided. The configuration is such that combustion is stopped by a signal that is output when the fuel rises.

With this configuration, when the remaining amount of fuel falls below a predetermined value, if the combustion amount is large (load is large), the timer time is set to a short value, and if the combustion amount is small (load, Since the timer time is set to a long time when the amount of fuel is small), combustion can be stopped after an appropriate amount of time depending on the load, and usability can be improved while maintaining safety.

(f) Example The present invention will be explained below based on embodiments shown in the drawings.

Figure 1 shows a control device for a combustor such as a hot air heater. In Figure 1, (1) is a control unit such as a microcomputer, (2)
) is an operation switch that supplies on/off operation input to the control unit (1), (3) is a temperature setting device, (4) is a room temperature sensor such as a thermistor, and (5) is a cartridge tank (6) (
7) A first residual oil amount switch consisting of a weight switch for detecting weight, and (7) an oil receiver to which a cartridge tank (6) is removably attached, a second oil level switch consisting of a float switch inserted into the tank (8). Remaining oil amount switch (remaining fuel amount detection part), (9) is a burner (not shown), an oil receiver is an electromagnetic pump (10) that supplies kerosene from tank (8) to this burner, and combustion air is supplied to the burner. Burner motor (11) that supplies
The combustion part (12) consists of three light emitting elements (12A
) (12B) (12C).

<13) is a combustion amount control section, and when this control section (13) is turned on by the operation switch (2),
The load tolerance is determined from the difference in temperature between the desired temperature set by the temperature setting device (3) and the room temperature detected by the room temperature sensor (4), and the combustion section (9) is adjusted according to the load as shown in Figure 2. The amount of combustion is adjusted in 12 steps, for example.

(14) is a display control section. When there is sufficient oil in the cartridge tank (6), this control section (14) controls the light emitting element (12) according to a signal from the first residual oil amount switch (5).
A) (12B>(12C)) is lit, and the entire indicator (12) lights up as shown in ■ in Figure 3.Also, when the amount of remaining oil in the cartridge tank (6) decreases, the first remaining oil amount switch Since the signal (5) changes, the control section (14) allows the light-emitting elements (12B) (12C) to light up, causing the lower half of the display (12) to illuminate as shown by ■ in FIG.

Also, when the cartridge tank (6) becomes empty and the oil level in the tank (8) drops slightly, the signal from the second remaining oil level switch (7) is input to the control unit (14). The control unit (14) turns on only the light emitting element <12C), and lights up the lower one-quarter portion of the display (12) as shown by ■ in FIG. Furthermore, when a count-up signal from a timer (15), which will be described later, is output, the light emitting element (12C) is made to blink as shown by (■) in FIG. 3 to notify that the oil is running out.

As shown in the flowchart in Figure 4, the timer (15) is set by the signal from the second remaining oil level switch (7) that is issued when the oil level in the tank (8) drops slightly. . At the same time, if the combustion amount at that time is larger than, for example, the sixth stage in Fig. 2, the timer time T is set to T3.
(for example, 12 minutes), and if it is /J% shorter than the sixth stage, the timer time T is set to TL longer than Ts (for example, 15 minutes). When the timer (15) counts up, the signal is transmitted to the combustion amount control section (13).
) and is sent to the display control unit (14), combustion is stopped, and a blinking display is performed on the display (12).

In the above-described embodiment, the oil receiver sets the timer time depending on the amount of combustion when the oil level in the tank 8) slightly drops and the signal is output from the second remaining oil amount switch (7). However, the timer time may be increased or decreased depending on the change in the combustion amount after the signal from the second residual oil amount switch (7) is output.

(g) Effects of the Invention Since this invention is configured as described above, when the remaining amount of fuel becomes low, combustion can be stopped after an appropriate period of time commensurate with the load, and the amount of combustion can be increased. When the amount of combustion is small, combustion is stopped early, and when the amount of combustion is small, combustion is continued as much as possible, thereby improving usability while maintaining safety.

[Brief explanation of the drawing]

The figures are all related to one embodiment of the present invention; Fig. 1 is a block diagram of a combustor control device, Fig. 2 is an explanatory diagram showing the relationship between load and combustion amount, and Fig. 3 is a display of an indicator. FIG. 4 is an explanatory diagram for explaining changes in state, and FIG. 4 is a flowchart for explaining the operation of the control device. (7)...Second residual oil amount switch (remaining fuel amount detection section),
(13)... Combustion amount control section, (15)... Timer.

Claims (1)

[Claims] (1) A combustion amount control section that adjusts the combustion amount of the combustion section according to the load, a fuel remaining amount detection section that detects when the remaining amount of fuel is below a predetermined value and outputs a signal, and When a signal is output from the amount detection section, a timer time is set according to the size of the amount of combustion, and a timer is provided to count the time, and combustion is stopped by the signal output when this timer counts up. A combustor control device characterized in that: