JPH01210755A - Controller of room heater - Google Patents

Abstract

PURPOSE:To reduce the number of ignition and extinguishment of a burner in the control for maintaining the set temperature by automatically switching on and off an electric room heater which is provided to a heating machine when a burner is stopped burning by a saving operation function. CONSTITUTION:The difference between room temperature in which the resistance of a room temperature sensor 5 is changed by a room temperature detecting part 6 and the set temperature in which the resistance of a room temperature set volume 7 is changed by a set temperature detecting part 8 is calculated in an operation part 9, a burning quantity determining part 10 determines a burning quantity, and combustion is performed by a burner 12 through a burner control part 11. When a saving operation function is actuated and the burner 12 is automatically extinguished and the signals of the operation part 9 is transmitted to a heater energization determining part 13, in the case where at this time a change-over switch 15 is not turned on, the conventional heating operation is performed without energizing an electric heater 4 by an electric heater control part 14. In the case where the change-over switch 15 is turned on, the electric heater 4 is switched on.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a control device for improving comfort in a combustion type heater using gas, oil, etc. as fuel.

[Conventional technology]

Conventionally, open-type combustion hot air heaters such as oil fan heaters raise the indoor temperature through combustion, and as the room temperature approaches the set temperature, the amount of combustion from the burner decreases.
The room temperature was kept at a constant set temperature. Also, the combustion amount of the burner is at least 900 to 1200 Keal.
/fir (leprosy is the limit, and if you use it in a small room or when the outside temperature is relatively high compared to midwinter such as early spring or early fall, the room temperature will rise above the set temperature even if you burn it with the minimum amount of combustion.) To avoid this problem, many models were equipped with an automatic extinguishing function, a so-called save operation function, which automatically extinguishes the fire when the temperature rises above a certain level.

FIG. 5 shows an example of room temperature control using these conventional combustion type hot air heaters. In Fig. 5, when heating is started at time to, the room temperature T gradually rises, and the set temperature T
, approaches. When the time t1 passes and the temperature reaches around the set temperature T0, the amount of burnt burr decreases, so the room temperature rise curve becomes gentler. If the outside temperature is relatively high or the product is used in a small room, the room temperature T will rise and exceed the set temperature T0 even if the combustion is performed at the minimum amount, and T-T0=
In the case of ΔT, when ΔT rises to +1°C (time t
1 hour), the automatic fire extinguishing function of save operation operates and stops combustion. When combustion stops, the room temperature T gradually decreases. Then, when 8T falls to 11℃ (time t, elapsed), the burner starts operating again and starts combustion, and the chamber i
Increase T. By repeating the above operations, the room temperature T is kept within a substantially constant temperature range.

[Problem to be solved by the invention]

Conventional heater control devices are configured as described above, so the automatic extinguishing function operates many times, and in the case of open burners, unburned gas is generated each time the burner is ignited and extinguished, dispersing the odor indoors. There have been problems with this, such as causing the user to feel uncomfortable as they spread around the room, and causing large changes in room temperature and temperature ripples, which impairs comfort.

This invention was made to solve the above-mentioned problems. By reducing the number of times the automatic extinguishing function operates as much as possible, the amount of unburned gas generated when the burner is ignited and extinguished is reduced, thereby eliminating bad odors. It is an object of the present invention to provide a control device for a heater that can suppress the occurrence of changes in room temperature and reduce temperature ripples.

Uten [Means for solving the problem] The heater control device according to the present invention includes a combustion type heater, an electric heater, and a save operation function that automatically controls when the burner stops burning. A switching means is provided for selecting whether or not to energize the electric heater.

[Effect]

The electric heater control section of the present invention automatically energizes the electric heater by selecting the changeover switch when the room temperature becomes higher than the set temperature by a predetermined value and the save operation function is activated and the burner stops combustion. or do not turn on the power.

〔Example〕

Hereinafter, one embodiment of the present invention will be described based on FIGS. 1 to 4. FIG. 2 shows a perspective view of the main body of the heater in which the present invention is implemented. 1 is the main body of the heater, and by operating the operation panel 2, the burner control section operates and starts combustion, blowing warm air. Hot air is blown out from Taguchi 3. 4 is an electric heater attached to a part of the heater body 1;
Generally, a quartz tube heater using a nichrome wire as a heating element or an infrared lamp heater is used.

FIG. 1 is a block diagram of a heater control device according to the present invention.

In the figure, 5 is a room temperature sensor, S is a room temperature detection unit that converts a change in the resistance value of the room temperature sensor 5 into temperature, 7 is a volume for setting the room temperature, and 8 is a volume for setting the room temperature The resistance value of the volume 7 is converted into a set temperature. 9 is a calculation unit that calculates the difference between the room temperature and the set temperature; 10 is a combustion amount determination unit that determines the combustion amount based on the value calculated by the calculation unit 9; and 11 is a combustion amount determination unit 10 that determines the combustion amount. A burner control unit for burning the burner 12 at a predetermined combustion amount, or for igniting or extinguishing the burner; 13 is a heater energization determining unit for determining energization to the electric heater 4 based on the value of the calculation unit 9; 14; is an electric heater control unit that turns on and off the power supply to the electric gFc heater 4 based on this determination.

The room temperature detection section 6, set temperature detection section 8, calculation section 9, combustion amount determination section 10, and heater energization determination section 13 constitute a control section 16, which is composed of, for example, a microcomputer.

Reference numeral 15 denotes a changeover switch as a switching means for selecting whether or not to energize the electric heating heater 4, and when it is on, it operates to energize the electric heating heater 4 based on the value of the calculation unit 9. When off, regardless of the value of calculation section 9,
The heater energization determining unit 13 operates so that the electric heater 4 is not energized.

Next, the operation will be explained using the flowchart shown in FIG.

When the heater starts operating at time 1o, the fuel vaporization section is preheated (step 17). When preheating is completed, the vaporized fuel undergoes an ignition process (stip 18),
Combustion control I (step 19) is entered. These operations are mainly performed by the burner control section 11.

Next, in step 20, the difference T- between the room temperature T obtained by converting the resistance value of the room temperature sensor 5 into a temperature by the room temperature detection section 6 and the set temperature T0 obtained by converting the resistance value of the room temperature setting volume 7 by the set temperature detection section 8. Calculate T0=ΔT in the calculation unit 9,
When ΔT<1°C, the process proceeds to step 21, where the combustion amount determination unit 10 determines the combustion amount based on 8T, and the burner control unit 1
1 and burn it with a burner 12.

By repeating steps 19, 20, and 21, the room temperature T gradually rises, ΔT increases, and the combustion amount decreases (when ti has elapsed).

Even if the amount of combustion is at its minimum, if the room temperature rises, 67
When the temperature reaches 21° C. (after 1,1 elapsed), the combustion amount determination section 10 transmits the combustion amount 0 to the burner control section 11, and the burner control section 11
stops combustion in the burner 12 and automatically extinguishes the fire (step 22).

When the burner 12 is automatically extinguished, a signal from the calculation unit 9 is sent to the heater energization determining unit 13. If the changeover switch 15 is not turned on at this time (step 23),
The process moves to step 24 without energizing the electric heater 4. This changeover switch 15 is used to allow the user to select whether or not to energize the electric heater 4 when automatically extinguishing the fire.If you do not feel the need for the electric heater 4, you can turn it off and switch to the conventional method. Heating operation is also possible. In this case, when ΔT≦-1℃, step 1
Returning to step 7, the burner 12 is started to burn, and the conventional room temperature control shown in FIG. 5 is performed.

When the selector switch 15 is on, ΔT'≦-0.5℃
(Step 25), and ΔT">-0
, 5° C. (when ts has elapsed), the electric heater controller 14 turns on the electric heater 4 (step 26).

FIG. 4 diagrammatically shows the state of room temperature control in this embodiment.

In the figure, when time t has elapsed after starting combustion, 8T
When the temperature reaches ≧1° C., combustion stops and the electric heater 4 is turned on, but the amount of heat generated decreases, so the room temperature T gradually decreases. The room iT is controlled to be around the set temperature T0, but if the temperature drops to ΔT'≦-0.5°C (when ts has elapsed), turn off the electric heater 4 (step 27). Return to step 17 and restart the operation of the burner 12, and the room temperature T will rise again due to combustion. Save Time from when combustion stops due to automatic extinguishing until the room temperature T falls and the burner 12 starts to re-ignite. At t3, the electric heater 4 is turned on, so the lowering of the room iT is gradual, and the number of ignition and extinguishing operations is significantly reduced compared to the conventional example. In the case of this open type burner, the amount of unburned gas generated during ignition and extinguishing is reduced, resulting in less odor.

In addition, since the temperature difference ΔT' when the burner 12 restarts operation is -0.5°C (ΔT - -1°C in the conventional example), the temperature ripple in the room temperature T can be reduced, and the change in room temperature The temperature is small and precise.

Control is possible.

In addition, in the above example, ΔT=-1°C, ΔT'=0.5
Although the explanation has been given on the case where the temperature is .DELTA.T or .DELTA.T', the optimum temperature may be selected according to each device.

〔Effect of the invention〕

As described above, according to the present invention, when the burner stops burning due to the electric heater attached to a part of the main body of the combustion type heater and the save operation function, the electric heater is automatically energized. A switching means is provided to select whether to turn on the electric heating or not, and when the temperature difference ΔT between the room temperature and the set temperature exceeds a predetermined value and the fire is automatically extinguished, the switching means is selected so as to automatically turn on the electric heating and a part of it. In this case, the number of times the burner is ignited and extinguished due to control to maintain the set temperature can be significantly reduced, the amount of unburned gas generated is reduced, and odor is prevented from entering the room temperature. It is possible to provide a comfortable heater that allows for less detailed room temperature control.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing a control device for a heater according to the present invention, FIG. 2 is an external perspective view of a heater according to an embodiment of the present invention, FIG. 3 is a flowchart showing its operation, and FIG.
This figure is also an explanatory diagram of room temperature control, and FIG. 5 is an explanatory diagram of room temperature control of a conventional heater. Reference numeral 4 indicates an electric heater, 5 indicates a room temperature sensor, 11 indicates a burner control section, 15 indicates a changeover switch (switching means), and 16 indicates a control section (microphone, computer). In the drawings, the same reference numerals indicate the same or corresponding parts. shows. Agent Masuo Oiwa (2 others) 2nd r! ! J 1, Harufusa parking structure 4 Electric heater fang 3 diagram

Claims (1)

[Claims] A burner that burns fuel, a burner control unit that controls combustion of the burner, and a control unit that controls the burner control unit based on a temperature difference between a room temperature measured by a room temperature sensor and a set temperature, and during combustion of the burner, This heater has a save operation function that stops combustion in the burner in response to a signal from the control unit when the room temperature rises above a predetermined value relative to the set temperature, and restarts combustion when the room temperature drops below a predetermined value. A heating device characterized in that it is provided with an electric heater and a switching means for automatically selecting whether or not to energize the electric heater when the burner stops burning due to a save operation function. device control device.