JPH0749886B2 - Heater controller - Google Patents

Description

TECHNICAL FIELD The present invention relates to a control device for improving comfort in a combustion type heater using gas, oil, etc. as a fuel.

[Conventional technology]

Conventionally, open-type combustion hot air heaters such as oil fan heaters raise the temperature of the room by combustion and decrease the burner's combustion amount as the room temperature reaches the set temperature, setting the room temperature at a substantially constant level. It was supposed to keep the temperature. Also,
The burner burns at a minimum of about 900 to 1200 Kcal / Hr, and burns at the minimum burnt amount when the outside temperature is relatively high compared to midwinter such as early spring and autumn and when used in a narrow room. However, since the room temperature rises above the set temperature, many have an automatic fire extinguishing function that automatically extinguishes when the temperature rises above a predetermined temperature, a so-called save operation function.

FIG. 5 shows an example of room temperature control by these conventional combustion type hot air heaters. In FIG. 5, when heating is started at time t ₀ , the room temperature T gradually rises and approaches the set temperature T ₀ . When the time t ₁ elapses and the temperature approaches the set temperature T ₀ , the combustion amount of the burner decreases and the room temperature rise curve becomes gentle. When the outside air temperature is relatively high or the room is used in a narrow room, the room temperature T rises and becomes equal to or higher than the set temperature T ₀ even if the combustion is performed with the minimum combustion amount, and T−T ₀ = ΔT is set. In this case, when ΔT rises to + 1 ° C. (when time t _{2 has} elapsed), the automatic fire extinguishing function of the save operation operates to stop combustion.
When the combustion stops, the room temperature T gradually decreases. And
△ When T falls to -1 ° C. (at time t ₃ has elapsed), start of combustion to start burner is operated again, gradually increasing the room temperature T. By repeating the above operation, the room temperature T is kept within a substantially constant temperature range.

[Problems to be Solved by the Invention]

Since the conventional heater control device is configured as described above, the automatic fire extinguishing function operates frequently, and in the case of the open burner, unburned gas is generated each time ignition or fire is extinguished, and a foul odor is generated indoors. However, there are problems such as being scattered around and making the user uncomfortable, and changes in room temperature and large temperature ripple, which impairs comfort.

The present invention has been made to solve the above problems, by reducing the number of times the automatic fire extinguishing function operates as much as possible, to reduce the amount of unburned gas generated when the burner is ignited and extinguished. Suppress the occurrence and reduce the number of ventilation,
An object of the present invention is to obtain a heating device with a small change in room temperature and a small temperature ripple, and a heater control device that allows a user to arbitrarily select such heating.

[Means for Solving the Problems]

The control device for a heater according to the present invention determines whether or not to automatically energize the electric heating heater in the combustion type heater and when the burner stops combustion by the save operation function. And a switching means for selecting.

[Action]

In the electric heating heater control unit according to the present invention, when the room temperature is higher than the set temperature by a predetermined value or more and the save operation function is activated and the burner stops the combustion, the user automatically selects the electric heating heater. It is possible to freely select whether to perform the operation of energizing the heater or the operation of only the combustion heating without energizing the heater.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 to 4. FIG. 2 shows a perspective view of a heater main body in which the present invention is embodied. Reference numeral 1 denotes the heater main body, and when the operation panel 2 is operated, a burner control unit operates to start combustion and blow warm air. Hot air is blown out from the outlet 3. 4 is an electric heating heater attached to a part of the heater body 1,
Generally, a quartz tube heater using a nichrome wire as a heating element, an infrared type lamb heater or the like 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, 6 is a room temperature detecting unit for converting a change in resistance value of the room temperature sensor 5 into temperature, 7 is a room temperature setting volume, and 8 is a room temperature setting volume 7 resistance value is converted into a set temperature. A set temperature detection unit, 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
Burn the burner 12 with the combustion amount decided by
Alternatively, a burner control unit for igniting and extinguishing, a heater energization determining unit 13 for determining energization to the electric heating heater 4 based on the value of the calculation unit 9, and a energization for the electric heating heater 4 based on this determination. It is an electric heating heater control unit that turns on and off.

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

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

Next, the operation will be described with reference to the flowchart of FIG.

When the operation of the heater is started at time t ₀ , the fuel vaporization section is preheated (step 17). When the preheating is completed, the combustion process (step 19) is entered through the ignition process (step 18) of igniting the vaporized fuel. These operations are mainly performed by the burner controller 11.

Next, at step 20, the difference T between the room temperature T obtained by converting the resistance value of the room temperature sensor 5 into the temperature by the room temperature detecting unit 6 and the set temperature T ₀ obtained by converting the resistance value of the room temperature setting volume 7 by the set temperature detecting unit 8. -T ₀ = ΔT is calculated by the operation unit 9, and ΔT <
When the temperature is 1 ° C., the process proceeds to step 21, and the combustion amount determination unit 10
The amount of combustion is determined based on T, and the burner 12 is burned through the burner controller 11.

Then, by repeating steps 19, 20, and 21, the room temperature T
Gradually increases, ΔT increases, and the amount of combustion decreases (when t _{1 has} elapsed).

Even if the combustion amount is minimum, if the room temperature rises, ΔT
When ≧ 1 ° C. (when t _{2 has} elapsed), the combustion amount determination unit 10 notifies the burner control unit 11 of the combustion amount 0, and the burner control unit 11 causes the burner 12 to operate.
The combustion is stopped and the fire is extinguished automatically (step 22).

When the burner 12 automatically extinguishes, a signal from the calculation unit 9 is sent to the heater energization determination unit 13, and at this time, the changeover switch
When 15 is not turned on (step 23), the electric heating heater 4 is not energized and the process proceeds to step 24. This changeover switch 15 is for allowing the user to select whether or not to energize the electric heating heater 4 during automatic fire extinguishing.
When the necessity of the electric heating heater 4 is not felt, the heating operation of the conventional method can be performed by turning it off. In this case, when ΔT ≦ -1 ° C., the process returns to step 17, the burner 12 is started to burn, and the conventional room temperature control shown in FIG. 5 is performed. In such an operation, since the electric heating heater 4 is not energized, the temperature ripple at room temperature is slightly large, but the power consumption is low.

When the changeover switch 15 is on, it is judged whether or not ΔT '≦ -0.5 ° C (step 25). When ΔT'>-0.5 ° C, the electric heating heater control unit 14 turns on the electric heating heater 4. Turn on (step 26).

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

In the figure, when time t ₂ elapses after combustion is started, ΔT ≧
At 1 ° C., the combustion is stopped and the electric heating heater 4 is turned on, but the amount of heat generation decreases, so the room temperature T gradually decreases. The room temperature T is controlled so as to be close to the set temperature T _0, but if it falls to ΔT ′ ≦ −0.5 ° C. (at the time of t ₃ ), the electric heating heater 4 is turned off (step
27), the operation of the burner 12 is restarted by returning to step 17, and the room temperature T rises again due to combustion.

Since the electric heating heater 4 is turned on during the time t ₃ from when the combustion is stopped by the save automatic fire extinguishing to when the room temperature T is lowered and the burner 12 starts to re-ignite, the decrease of the room temperature T is gentle. The number of fire extinguishing is greatly reduced as compared with the conventional example. Therefore, in the case of the open type burner, the amount of unburned gas generated due to ignition and extinguishing is reduced, and the odor is reduced. In addition, since the burning time is short, the number of ventilations can be reduced.

Also, when the burner 12 restarts operation, the temperature difference ΔT ′ is −
Since it is 0.5 ° C (ΔT = -1 ° C in the conventional example), room temperature T
It is possible to reduce the temperature ripple of, the change in room temperature is small, and it is possible to perform detailed room temperature control.

In the above embodiment, ΔT = −1 ° C., ΔT ′ = 0.5 ° C.
Although the case has been described, it is sufficient that ΔT <ΔT ′, and the optimum temperature may be selected according to each device.

〔The invention's effect〕

As described above, in the combustion type heater having the save operation function, whether to automatically energize the electric heating heater and the electric heating heater when the burner stops the combustion due to the save operation function. Since the switching means for selecting is provided, if the switching means is selected so as to automatically energize the electric heating heater when the burner combustion is stopped by the save operation function, in order to maintain the set temperature. As a result, the number of burner ignitions and extinguishments is greatly reduced, the amount of unburned gas generated is reduced, and the generation of bad odors in the room can be prevented. Also, since the burning time is shortened, it is possible to reduce the number of ventilations, and it is possible to perform detailed room temperature control with little room temperature changes and temperature ripples, which enables comfortable heating operation. On the other hand, when the switching means is selected so as not to energize the electric heating heater, the power consumption can be suppressed to be low, and the conventional heating operation with a small electricity bill can be performed.
The user can freely select the heating method according to his needs, which greatly improves the convenience of use.

[Brief description of drawings]

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 flow chart showing its operation, and FIG.
Similarly, FIG. 5 is an explanatory view of room temperature control, and FIG. 5 is an explanatory view of room temperature control of a conventional heater. Reference numeral 4 is an electric heating heater, 5 is a room temperature sensor, 11 is a burner controller, 15 is a changeover switch (switching means), and 16 is a controller (microcomputer). In the drawings, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Claims] 1. A burner for burning fuel, a burner control unit for controlling combustion of the burner, and a control unit for controlling the burner control unit according to a temperature difference between a room temperature and a set temperature measured by a room temperature sensor, During the combustion of the burner, when the room temperature becomes higher than the preset temperature by a predetermined value or more, the combustion of the burner is stopped by the signal from the control unit,
In a heater having a save operation function that restarts combustion when the temperature falls below a predetermined value, an electric heating heater,
A controller for a heater, comprising switching means for automatically selecting whether or not to energize the electric heating heater when the burner stops fuel by the save operation function.