JPH0749848B2 - Control equipment for heating equipment - Google Patents

Description

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

2. Description of the Related Art Generally, a heating device called an automatic temperature control type automatically switches a 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, there are various regional characteristics and personal feelings of using heating equipment,
In some cases, a manual combustion amount switching method that can be used with a manual feel is preferred over the automatic combustion amount control by the above-mentioned automatic temperature control system, so recently, in addition to the above automatic temperature control system, a manual combustion function that can also set the combustion amount by manual setting Things that are equipped with are becoming available.

FIG. 5 is a schematic diagram showing the structure of a conventional oil heating device.
Reference numeral 101 is a fuel tank, and the fuel oil is sucked up by an electromagnetic pump 102 and sent under pressure to a vaporizer 103. And this vaporizer 1
It is vaporized in 03 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 vaporizer 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, turns off the relay 112 when preheating is completed, and turns on the relay 113 to turn on the combustion air supply device 104, the electromagnetic pump 102, and the igniter 114. It is energized, ignited and burned. The relay 115 is a two-circuit two-contact relay, and the combustion is set to strong combustion when it is closed to 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 that switches between automatic temperature control and manual combustion, and the switch 117 is a switch that selects between strong and weak during manual combustion.

When the automatic temperature control system is selected, the combustion amount is set by 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, when the room temperature is higher than the set temperature, combustion occurs. Becomes a weak combustion. On the other hand, when manual combustion is selected, strong or weak combustion is fixed regardless of the set temperature.

As described above, in the conventional heating device, 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. Even if you change the set temperature to, it has no effect,
The changed set temperature becomes effective only after the manual combustion amount control is switched to the automatic combustion amount control.

However, in the above-described conventional configuration, the manual switch must be operated each time to switch between the automatic combustion amount control and the manual combustion amount control, and the operability is poor. For example, since the room temperature rises too much, when lowering the set temperature,
There is a misunderstanding that it is necessary to change the set temperature after switching to automatic combustion amount control, and if you forget that manual combustion amount control is in progress, the combustion amount does not change even if you change the set temperature. You will be invited.

The present invention solves such a conventional problem, and forcibly switches to the automatic combustion amount control when the set temperature is changed even during the manual combustion amount control.

Means for Solving the Problems To achieve the above object, the control device for a heating device of the present invention first detects the room temperature by a room temperature detector, and automatically changes the combustion amount according to the detected room temperature. This automatic combustion amount control is released by operating the control unit and the manual switch,
In addition, a manual combustion amount control unit that sets a plurality of specific combustion amounts and a switching unit that switches from manual combustion control to automatic combustion amount control when the set temperature is changed are provided.

Operation According to the present invention, by changing the set temperature, the present invention can automatically switch to the automatic combustion control even during the manual combustion amount control.

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. Various switches are arranged on the panel 8.

The control device 9 includes a room temperature setting unit 17 that sets a desired room temperature with the temperature control switches 17a and 17b, a room temperature detecting unit 10 that receives the output of the room temperature detector 7, and the detected room temperature and the room temperature setting unit.
Automatic combustion amount control unit 18 that automatically determines the combustion amount according to the preset temperature set in 17, and manual combustion whose combustion amount is already fixed to strong combustion 19a, medium combustion 19b, weak combustion 19c The fuel control unit 11 that receives the output information from the amount control unit 19 and the automatic combustion amount control unit 18 or the manual combustion amount control unit 19 and changes the pulse frequency output to the electromagnetic pump 3.
And a combustion air amount controller 12 for changing the combustion air amount accordingly, and a manual switch 13a arranged on the panel 8.
It is composed of a switch processing unit 13 for reading the switching status of 1 and a delay unit 15 for delaying a predetermined time until the information of the switch processing unit 13 is fixed. A changeover switch (which serves as a changeover unit) 16 is a switch for instructing the combustion amount of the electromagnetic pump 3, and a strong combustion 19 is caused by a changeover operation of the manual switch 13a.
a, medium combustion 19b, weak combustion 19c, and automatic combustion amount control unit 18, and at the same time, the display 20 in FIG. 2 switches to strong, medium, weak, and automatic.

Further, the digital display unit 14 displays the room temperature and the set temperature, and normally displays the room temperature detected by the room temperature detection unit 10, and when the temperature control switch 17a or the temperature control switch 17b is pressed, the digital display unit 14 is displayed. The display content of will change to the display of the set temperature, and then the temperature control switch 17a or 17b
Press to change the set temperature.

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 to perform 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. For example, when the set value is 0, automatic combustion control, when 1 is strong combustion, when 2 is medium combustion, 3 is set. In the case of, information for instructing to perform weak combustion is set, and combustion is distributed by this value. Then, in step 31, the display 20 is changed over to the switch.
The display is changed according to the set value of 16. If the manual switch 13a is not operated, steps 29 to 31 are skipped and step 32 is executed.

In step 32, it is determined whether or not the temperature control switch 17a or 17b is operated. If the temperature control switch 17a or 17b is operated, the display content of the digital display unit 14 is switched from the room temperature display to the set temperature display in step 33. (The set temperature display automatically returns to the room temperature display if the temperature control switch 17a or 17b is not operated for a certain period of time.) Step 34
Is for determining whether the temperature control switch 17a or 17b is further operated continuously. If the temperature control switch 17a or 17b is further operated, the set temperature is changed in step 35. In step 36, the set value of the changeover switch 16 is forcibly set to 0 based on the output from the temperature control switch 17a or 17b, whereby the automatic combustion amount is controlled even if the manual combustion amount control is selected until then. It will be changed to control. Also, step 34
If it is determined that the temperature control switch input is interrupted, the process skips to step 37, so step 35 and step 36
Is not executed.

In step 37, the combustion amount is distributed 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. When the setting value is 2, the medium combustion setting in step 40 is selected, and when the setting value is 3, the weak combustion setting in step 41 is 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. The combustion amount is automatically set, while the step 39 To 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-described embodiment, when using the manual combustion amount control of strong, medium, and weak slippage, it is desired to make it warmer or to make it a little weaker, and when the set temperature is changed, it automatically The automatic combustion amount control is switched to, and room temperature control suitable for the set temperature is performed. Therefore, since the manual combustion amount control is being performed, there is an advantage that it is sufficient to directly change the set temperature without performing a troublesome operation such as changing the setting to the automatic combustion amount control and then changing the set temperature.

Further, it is possible to prevent complaints due to an erroneous operation that the combustion amount does not change even if the set temperature is changed.

Although the two temperature adjusting switches are used to change the set temperature in the above embodiment, it is also possible to change the set value in an analog manner by using a variable resistor instead of the switches.

EFFECTS OF THE INVENTION As described above, according to the control device for a heating device of the present invention, in addition to the automatic combustion amount control and the manual combustion amount control being selectable by the changeover switch, only the set temperature is changed during the manual combustion amount control. Since you can switch to automatic combustion amount control with,
The usability is remarkably improved, and the temperature control setting becomes effective without being aware of the state of the automatic / manual combustion amount control, so that the degree of erroneous operation is reduced.

[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 a device, and FIG. 6 is a control circuit diagram of the conventional example. 6 ... Combustor, 10 ... Room temperature detection part, 13a ... Manual switch, 16 ... Changeover part (changeover switch), 17 ... Room temperature setting part, 18 ... Automatic combustion amount control part, 19 ... Manual combustion Quantity 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. The automatic combustion amount control unit that automatically changes the combustion amount using the difference from the set temperature set in step 2 as the input signal, and the manual combustion amount that is set to multiple specific combustion amounts regardless of room temperature based on the output from the manual switch. And a switching unit for switching from the manual combustion amount control to the automatic combustion control by the automatic combustion amount control unit when a temperature change output is input from the room temperature setting unit during the manual combustion control by the manual combustion amount control unit. Control device for heating equipment.