JPH0754204B2 - Heater controller - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control device for a heating machine that varies a combustion amount according to room temperature.

2. Description of the Related Art Generally, a heater called an automatic temperature control type automatically switches the combustion amount according to a room temperature detected by a built-in room temperature detector and a preset temperature. That is, the combustion amount is increased when the room temperature is low, the combustion amount is decreased when the room temperature is high, and the room temperature is controlled by turning OFF with a certain differential when the room temperature rises even with the minimum combustion amount.

Therefore, the user only needs to set the set temperature, and then the device automatically determines the combustion amount, raises the room temperature to the set temperature, and maintains the room temperature at that temperature.

On the other hand, since there are various regional characteristics and individual feelings of using a heater, there are cases where a manual combustion amount switching method that can be used with a manual feeling is preferred to the automatic combustion amount control by the above-mentioned automatic temperature control method. In addition to the temperature control type, it is also equipped with a manual combustion function that allows manual setting of the combustion amount.

FIG. 5 is a schematic diagram showing the structure of a conventional oil heater. Ten
Reference numeral 1 denotes a fuel tank, and fuel oil is sucked up by an electromagnetic pump 102 and sent under pressure to a vaporizer 103. And this vaporizer 103
Is vaporized and mixed with the combustion air supplied from the combustion air supply device 104 to form a flame 105. The burned exhaust gas exchanges heat with the indoor air through the combustion cylinder 106 and the radiator 107 to heat the room, and then is exhausted to the outside. A room temperature detector 109 for controlling room temperature is attached to the outer frame 108.

FIG. 6 shows a conventional control circuit, where 110 is a power supply and 111
The control unit performs combustion control by performing temperature control of the carburetor 103, room temperature detection by the room temperature detector 109, and various timing controls. The control unit 111 first performs preheating by turning on the relay 112 at the start of operation. When preheating is completed, the relay 112 is turned off, and the relay 113 is turned on to turn on the combustion air supply device 104, the electromagnetic pump 102, and the igniter.
114 is energized to ignite and burn. The relay 115 is a two-circuit, two-contact relay, and the combustion is set to strong combustion when it is closed on the sides a and a ', and is set to weak combustion when it is closed to the sides b and b'. The switch 116 is a switch for switching between automatic temperature control and manual combustion, and the switch 117 is a switch for selecting strong or weak during manual combustion.

When the automatic temperature control method is selected here, the combustion amount is determined by the difference between the room temperature and the set temperature, and when the room temperature detected by the room temperature detector 109 is lower than the set temperature, strong combustion occurs, and conversely the room temperature is set to the set temperature. If it is higher, the combustion becomes weak. On the other hand, when manual combustion is selected, strong or weak combustion is fixed regardless of the set temperature.

However, in the above-mentioned conventional configuration, automatic temperature control (hereinafter referred to as automatic combustion amount control) and manual combustion (hereinafter referred to as manual combustion amount control) exist as completely independent functions. It is also possible to change the set temperature during volume control, in which case the combustion amount is not affected, and the changed set temperature becomes effective only after switching from manual combustion amount control to automatic combustion amount control. It turns out that.

Therefore, even if the set temperature is changed during the manual combustion amount control, the display only changes, and the combustion amount does not change accordingly, which gives the user distrust. That is, if you change the set temperature while forgetting that the manual combustion amount control is in progress,
I feel the problem that the amount of combustion does not change,
It was not a user-friendly operation method. In addition, the mixture of both the automatic combustion amount control and the manual combustion amount control is a complicated operation method and may cause an erroneous operation.

The present invention solves such a conventional problem, and does not accept a change in set temperature during manual combustion amount control.

Means for Solving the Problems In order to achieve the above object, the control device for the heating device of the present invention is
First, the room temperature setting unit that sets the room temperature and the room temperature detector detect the room temperature, and the automatic combustion amount control unit that automatically changes the combustion amount according to the detected room temperature, and this automatic combustion amount control by operating the manual switch. A manual combustion amount control unit that releases and sets a plurality of specific combustion amounts, and a switch that switches between this manual combustion amount control and automatic combustion amount control, and when manual combustion amount control is selected, room temperature setting The configuration is such that a switching unit that does not accept room temperature changes by the unit is provided.

Effect The present invention, by the above configuration, accepts a set temperature change of room temperature during automatic combustion amount control, but during manual combustion amount control,
Cannot accept changes in set temperature.

Embodiment An embodiment of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a configuration diagram of the present embodiment, and FIG. 2 is a display portion of the same embodiment. A changing electromagnetic pump, 4 is a carburetor, 5 is a combustion air supply device, 6
Is a combustor, and 7 is a room temperature detector attached to the outer frame 1, and an electric signal obtained by converting the room temperature is input to a control device 9 inside the panel 8. As shown in FIG. 2, the panel 8 has a digital display section 14 for switching between room temperature or set temperature, a sub display section 14 'for distinguishing the displayed contents, and a set temperature increasing or decreasing direction. Temperature control switches 17a and 17b, which are also used to generate the starting point for switching the display of the digital display unit 14 to the set temperature for a fixed time (about 5 seconds), and the amount of combustion automatically according to the room temperature. A manual switch 13a for switching between the automatic combustion amount control for changing the combustion amount and the manual combustion amount control for which the combustion amount is fixed, and its monitor display 20 are provided.

The controller 9 includes temperature control switches 17a and 17b arranged on the panel 8 for setting the room temperature to a desired temperature, a room temperature setting unit 17 for judging the operation status and changing the set temperature, and the set temperature. And an automatic combustion amount control unit 18 that automatically determines the combustion amount according to the detected temperature of the room temperature detection unit 10 that determines the indoor temperature from the output of the room temperature detector 7, and the combustion amount is already strong
a, a manual combustion amount control unit 19 fixed to medium combustion 19b and weak combustion 19c, and a pulse output to the electromagnetic pump 3 in response to output information from the automatic combustion amount control unit 18 or the manual combustion amount control unit 19 A fuel control unit 11 that changes the frequency, and a combustion air amount control unit 12 that changes the combustion air amount accordingly.
Switch processing unit 1 for reading the switching status of the manual switch 13a
3 and a delay unit 15 that delays for a fixed time until the information of the switch processing unit 13 is fixed. The change-over switch 16 is composed of a switch 16a for changing over the combustion amount control, temperature control switches 17a and 17b, and a switch 16b inserted in series in a circuit connecting the room temperature setting unit 17, and the switch 16a is a changeover of the manual switch 13. Strong burning by operation 1
9a, medium combustion 19b, weak combustion 19c, and automatic combustion amount control unit 18 are switched, and at the same time, the display 20 in FIG. 2 is switched to strong, medium, weak, and automatic.

On the other hand, the switch 16b is interlocked with the switch 16a, and is closed only when the switch 16a selects the automatic combustion amount control unit 18, and when the other manual combustion amount control unit 19 is selected. It is configured so that the operating status of the temperature control switches 17a and 17b is not transmitted to the room temperature setting unit 17 when opened.

FIG. 3 shows a part of a concrete circuit of a main part. Control device 9
Is composed of a microcomputer 21 and peripheral circuits. The microcomputer 21 shown here is a CPU, R
It is a so-called one-chip microcomputer that has an OM, a RAM, and an input / output unit.

The room temperature detector 7 is connected to the input section of the microcomputer 21 via the A / D converter 22. As a result, the temperature signal from the room temperature detector 7 is converted into a binary code and read by the microcomputer 21. 23 is an operation switch for instructing the start of combustion, and includes a manual switch 13a and a temperature control switch 1
It is input to the microcomputer 21 like 7a and 17b. 24 is an AC power supply, 25 is an electric heating element embedded in the vaporizer 4, 26 is a signal from the microcomputer 21, and the electric heating element 25
27 is an igniter.

Next, the operation of this embodiment configured as described above will be described.
When the operation switch 23 is turned on, first, the relay 26 is turned on to energize the electric heating body 25 to perform preheating. When preheating is completed, the relay 26 is turned off and then the igniter 27 is turned on. At the same time, the combustion air amount control unit 12 outputs the combustion air supply device 5 from the output unit.
The fuel control unit 11 outputs a constant pulse signal from the output unit to the electromagnetic pump 3 for ignition and combustion. After that, the combustion air amount control unit 12 operates in conjunction with the fuel control unit 11. Next, the operation at the time of combustion will be described using the flowchart of FIG.

First, in step 28, it is judged whether or not the manual switch 13a is operated, and if it is operated, input processing such as appropriate delay time processing for noise removal or erroneous operation prevention is performed in step 29. Step 30 is to change the set value of the changeover switch 16 in response to the result of the above-mentioned input processing.
In the case of 2, the information for instructing to perform the medium combustion in the case of 3 is set, and the combustion is distributed by this value. Then, in step 31, the display 20 is changed to a display according to the set value of the changeover switch 16.
If the manual switch 13a is not operated, go to step 2 above.
Step 9 is skipped from 9 and step 32 is executed.

In step 32, the set value of the changeover switch 16 is confirmed, and it is checked whether the set value is 0 or not. This is to judge whether or not the automatic combustion amount control is selected.If the automatic combustion amount control is selected, the process proceeds to step 33, and whether or not the temperature control switch 17a or 17b is operated in step 33. If it is operated, step 34
Switch the display content of the digital display 14 from the room temperature display to the set temperature display (the set temperature display is the temperature adjustment switch 17a
Or if the operation of 17b is not performed for a certain period of time, it will automatically return to the room temperature display.) In step 35, it is determined whether or not the temperature control switch 17a or 17b is further operated continuously, and when it is continuously operated, the set temperature is changed in step 36. When the manual combustion amount control is selected, the above step 33 to step 36 are skipped, so that the set temperature cannot be changed.

Step 37 is a process for distributing the combustion amount according to the set value of the changeover switch 16. When the set value is 0, the automatic combustion amount control of step 38 is selected, and when the set value is 1, the strong combustion of step 39 is performed. If the setting is 2, the medium combustion setting in step 40 is performed. If the setting is 3, step 41 is performed.
The weak combustion setting of will be selected. The automatic combustion amount control in step 38 calculates the combustion amount according to the difference between the room temperature detected by the room temperature detector 7 and the set temperature, and the combustion amount is automatically set, while from step 39 Step 41
The combustion amount is fixed to strong, medium and weak, and acts as a manual combustion amount control.

In step 42, the pulse frequency corresponding to the combustion amount obtained in steps 38 to 41 is converted, and in step 43, the pulse frequency is output from the output unit to the electromagnetic pump 3.

According to the configuration of the above embodiment, the temperature control switches 17a and 17b are being used during manual combustion amount control for strong, medium, and weak movements.
Even if the button is operated, it is not accepted, and the user can recognize that the operation is incorrect, and at the same time, there is no fear that the set temperature is unnecessarily changed.

As described above, according to the controller of the heating apparatus of the present invention, the temperature control switch is accepted during the automatic combustion amount control, but the temperature control switch unrelated to combustion is accepted during the manual combustion amount control. Since it is prohibited, there is no mistaken operation,
Since it will provide a fool-proof operating environment,
This has the effect of improving usability.

[Brief description of drawings]

FIG. 1 is a block diagram of a control device according to an embodiment of the present invention,
FIG. 2 is a configuration diagram of a display unit of the control device, FIG. 3 is a specific circuit diagram of the main part, FIG. 4 is a flowchart for explaining the operation during combustion, and FIG. 5 is a conventional heating system. FIG. 6 is a schematic configuration diagram showing the machine, and FIG. 6 is a conventional control circuit diagram. 6 ... Combustor, 10 ... Room temperature detection part, 13 ... Manual switch, 17 ... Room temperature setting part, 18 ... Automatic combustion amount control part, 19 ...
... Manual combustion amount control unit.

Claims (1)

[Claims] 1. A combustor, a room temperature detecting section for detecting the temperature of a heated room, a room temperature setting section for setting the room temperature to a desired temperature, a room temperature detected by the room temperature detecting section, and the room temperature setting section. Automatic combustion amount control unit that automatically changes the combustion amount using the difference from the set temperature as an input signal, and manual combustion amount control that sets multiple specific combustion amounts regardless of room temperature based on the output from the manual switch And a switch for switching between the automatic combustion amount control unit and the manual combustion amount control unit, and when the manual combustion amount control is selected, a switching unit that does not accept a change in set temperature by the room temperature setting unit. The control device for the heater provided.