JPS61110813A - Control device of burning appliance - Google Patents

Abstract

PURPOSE:To eliminate a reset process at the time of back-up by a method wherein among various kinds of terms to be put in memory function in a micro- computer, the terms, which are needed permanently for holding memory function, are selected and put them into computer memory function. CONSTITUTION:Pushing on a power supply switch 25, an operation switch 11 and a starting switch 19 of a micro-computer 9 are closed for entering in operational condition for the whole units, and operation conditions program are established. Even in a case AC power supply is cut-off due to a momentary power supply failure, the voltage of micro-computer is able to maintain for a time of (c), because of the discharge from the condensers 53, 54, 55 arranged in the circuit between f-d points of the micro-computer. After having elapsed the time (c), the computer 9 keeps to continue its working until the reset circuit begins to operate, the memorized data function in the micro-computer such as time display, supply of fuel, water detecting and setting up temperature or the like are operating as they are. The counter in the micro-computer is ticking the time and also the temperature setting is memorized, therefore, it is not necessary to prepare the reset process when the power supply failure is recovered.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a control/device for combustion appliances such as oil fan heaters.

Conventional technology In general, this type of control device is constructed using a microcomputer (hereinafter referred to as a microcomputer) that stores a predetermined combustion control program, and is capable of not only controlling combustion necessary for combustion equipment, but also controlling temperature settings and refueling. , water detection, ventilation, modest operation, timer settings, and other various conditions are stored in this microcomputer. Among these various conditions, the conditions other than the combustion control sequence are stored by the user as necessary, but if there is a power outage, for example, these memories stored in the microcomputer will be lost. There was a problem in which the user had to reconfigure (memorize) the settings.Therefore, conventionally, as shown in Figure 8, as a power source for microcomputer A, in addition to Toryu aB, which was configured by converting AC power into DC voltage, , 71 rad order large capacitor C
, D, E and a resistor F is provided, and electricity is supplied from the backup power supply G in the event of a power outage when the main power supply B stops supplying power.

Here, the storage program for the various conditions mentioned above in the microcomputer A is constructed as shown in FIG. 9, and its operation will be explained. First, when the operation button is turned on, it passes through point A to see if the backup voltage is higher than the voltage that guarantees the operation of microcomputer A (for example, 3.5V). Capacitor (
If the voltage at point e due to , D, and E is 3.5 V or higher, the memory continues to be stored in the memory, so you can proceed to the next step, but 3
．． If it is less than 5V, it passes through point a, lights up the reset lamp, and combustion is stopped. If it is 3.5V or more, check whether the abnormality memory is stored. In other words, first check the refueling memory, and if there is refueling memory, turn on the refueling lamp and go to point a. Water detection memory when there is no refueling,
Think of it as ventilation memory and it works the same way as refueling. If the cause is none of the above, it will directly lead to 0 points. If there is no abnormal memory, check whether there is a modest operation memory. If there is no such thing, it passes through point C and enters steady operation. If there is, the vehicle passes through two points, lights up the modest operation lamp, and then enters the modest operation and reaches the hot point. If you want to perform a modest operation during steady operation, enter this in the memory and reach the two points.

If you do not drive sparingly, you will reach the point as is,
Proceed to check whether there is any abnormality. If there is an abnormality, first check whether the refueling is normal, and if refueling is necessary, store this in memory, turn on the refueling lamp, and go to point a. The same goes for water detection and ventilation, and in the case of other abnormalities, a simple reset lamp is turned on and combustion stops. In addition, if there is no abnormality, it will be checked for power outage. If there is no power outage, the system returns to the Keha point and operates in either steady or moderate operation. In the event of a power outage, the system returns to point 1 and checks each memory, and operates in this loop.After an error occurs, it reaches point 3 and enters a loop to check whether there is a power outage.

Problems to be Solved by the Invention As described above, according to the conventional example, when an abnormality occurs due to refueling, water detection, ventilation, etc., it is stored in memory, and if the backup voltage is higher than the microcomputer operating voltage, it is stored as is. Stop combustion. However, even the elements that need to be set each time the car is used, such as when driving sparingly, are stored in memory. Although not explained in this diagram, the memo IJ can also be used for elements that are set every day, such as timer settings.
- As mentioned above, it is preferable to set these conditions on a case-by-case basis based on usage conditions, as this may cause unexpected problems for the combustion appliance. For example, during a power outage, the temperature in the room has dropped because the door was opened and people went in and out, and even if you want to quickly heat the room when the power goes back, it will be difficult to warm up the room if you have stored it in a low-temperature mode (low heating due to weak combustion). A problem like this will occur.

The present invention has been made in view of these points, and an object of the present invention is to continue to store only a part of the conditions stored in the microcomputer when backing up the microcomputer.

Means for Solving the Problems In order to achieve the above object, the present invention provides a memory function only for conditions that need to be continuously stored among the various conditions stored in the microcomputer.

Effect of the present invention Due to the above-described effect, only the conditions that have a memory function are continuously memorized, and the other conditions are not memorized and the loop of constantly checking is repeated, and unless the user sets (memorizes) them again, the conditions will not be stored. No more driving.

Example An example of this will be described below with reference to FIGS. 1 to 7.

First, a combustion appliance, for example, an oil fan heater, has a fixed oil link a and a burner 4 inside a main body consisting of an outer device and a bottom plate 2, as shown in FIG. Combustion gas A burned in the burner 4 is blown out as warm air C from a looper 7 together with indoor air B by a fan 6 attached to a blower motor S, and is used for indoor heating. FIG. 5 shows an example of the control circuit, and shows a control circuit 10, which is mainly composed of a microcomputer 9 (hereinafter referred to as microcomputer) that stores 8 points of AC power supply, combustion sequence, etc., and operation switch. 11 to form a closed loop. In addition, between points a and b of the AC power supply, there is a series circuit between a relay contact 12 and a heater 13 for vaporizing kerosene for the burner 4, and a relay contact 14, a blower motor 6, and a series circuit for sending combustion air into the burner 4. A series circuit with the Panamoke 15, a relay contact 16, an igniter 17, and a pump circuit 1 that sends kerosene to the vaporization chamber in the burner.
Connect the series circuit with 8 and control circuit 1 respectively.
0 is a switch 19 for starting the microcomputer 9;
A display section 20 that displays the operating state of the control circuit 10 and an operation section 24 are connected.

FIG. 3 is a detailed diagram of the display unit 20. Inside the display unit 20, there is a group of diodes 21 that indicate the operating status, and a set temperature (example 18).
There are a temperature setting diode group 22 indicating the temperature (°C=lit) and the room temperature (Example 22°C=point, X), and a timer number table 23 indicating the time and one hour of the timer. FIG. 4 also shows the operation panel 24,
6 is a power switch button, and when this button is pressed, the operation switch 11 and the start switch 1 of the microcomputer 9 shown in Fig. 5 are activated.
9 closes, the entire device enters the operating state, and the third
The operation lamp 26 shown in the figure lights up. When the moderate operation button 27 in Fig. 4 is pressed, "moderate operation" is performed, in which combustion is performed in three stages: strong combustion, weak combustion, and stop, in contrast to the repeated strong combustion and weak combustion during steady state. Name it.

When this is pressed, the lamp 34 in FIG. 3 also lights up. If you press it again, the "moderate operation" is canceled and the lamp 34 is also extinguished. Buttons 28 and 29 are temperature adjustment buttons. The slide switch 30 and buttons 31 and 32 are used to set the current time and timer time, and the button 33 is used to set the timer. When pressed, combustion stops, and when the time reaches the timer setting time, operation starts. This is the sequence that starts. Incidentally, when the timer button 3a is pressed, only the timer lamp 35 and the time display tube 2a shown in FIG. 3 are turned on, and the others are turned off. The two lamps for "refueling" and "water detection" are float switches installed in the fixed tank 3, and when the oil falls below a certain level, the refueling lamp 36 and reset lamp 38 are turned on, and combustion is also stopped. let Further, when the water in the oil exceeds a certain level, the water detection lamp 37 and the reset lamp 38 are turned on, and combustion is also stopped. Note that when the amount of oxygen in the air decreases, a combustion detection machine inside the burner 4 operates and transmits this to the microcomputer 9 to stop combustion. At this time, the ventilation lamp a9 and the reset lamp 3 are activated.
Turn on 8.

FIG. 7 shows a main part of the control circuit 10 in FIG. 5. That is, the AC power is converted to low voltage by the transformer 40, and the AC power is converted to low voltage by the AC bridge 41 and the capacitor 42.
The load group operated by this voltage that generates a DC voltage between d includes the relay contact coils shown in FIG. 6, and these are operated by the signal from the output terminal of the microcomputer 9. A 3-terminal regulator 4 is connected between c and d.
Connect 4. A diode 48 is connected between the ground terminal 44a of the regulator 44 and the six negative points so that the voltage at the output terminal 44b=0 point is, for example, about 5.5V. In addition, the load 49 such as a light emitting diode is e −d
Connect between points. The microcomputer 9 is connected between the 0 point and the d point via the diode 50. A backup power supply circuit consisting of a low value resistor 52 and a large capacity capacitor 53, 54, 55 of the order of 7 rad is connected in parallel with the microcomputer 9 between the diode 5o and the point d.

Other loads such as sensor circuits 51, reset circuit 46
etc. are also connected in the same way.

In the above configuration, when the operation button 25 is first pressed, the switches 11 and 19 in FIG. 2 are closed, and the control circuit 10 is activated. First, the heater 13 for vaporizing kerosene inside the burner 4 generates heat, and when it reaches a certain temperature, the contact 12 opens and at the same time the contact 14
closes, the blower motor 5 and the burner motor 15 start rotating, and when they reach a constant rotation, the contacts 16 close and the electromagnetic pump 18 and igniter 17 are operated. As a result, kerosene is sent to the vaporizer heated by the heater 13 and becomes a gas state, mixed with air sent from the burner motor 15, and ignited by the igniter 17 to form a flame. The igniter 17 is equipped with a timer mechanism so that the igniter 17 automatically stops after igniting for a certain period of time.

The combustion state of this flame is monitored by the combustion detection mechanism, and this signal is sent to the microcomputer 9. Also,
The exterior layer has a temperature detection element that detects the room temperature, and it constantly detects the room temperature and displays (blinks) the temperature on the temperature display lamp 22 shown in Figure 3. At 22°C, combustion is weak. When operating sparingly, combustion stops when the room temperature is higher than the set value, as described above.

Other button operations and lamp displays are as described above.

In such a state, even if the AC power supply is cut off due to a momentary power outage, etc., the capacitors 53 and 54 are connected between points f and d in Fig. 7.
．． By discharging from 55 (backup voltage), the microcomputer operating voltage is maintained until time C as shown in FIG. 6a. The microcomputer 9 continues to operate until the reset circuit operates after time C, and the clock time 1, oil supply, water detection, temperature settings, etc. stored in the microcomputer 9 are maintained as they are. Therefore, the time is kept ticking by the counter in the microcomputer 9, and the set temperature is also stored as is, so there is no need to reset these when the power is restored.

However, the conditions that require confirmation (in this embodiment, the conditions for modest operation) are lost in memory even if the microcomputer is operating. That is, the memory program of the microcomputer 9 is structured as shown in FIG. In FIG. 1, this microcomputer program uses the memory units 60 and 61 for the modest operation explained in the conventional example of FIG.
Except for the above, the rest is the same as the conventional one, and only the abnormality memory 67 for refueling, water detection, ventilation, etc. is provided.

Therefore, according to this configuration, during normal operation after the normal operation of 62, it is necessary to check whether 63 → 64 → 65 → 62 → 63 should be operated sparingly. 66 → 67
→ 62 → 63 → 64 → 65, and you will be sure to check whether you want to drive sparingly. Therefore, if the user wants to perform a conservative operation not only during normal times but also during a power outage or after the power is restored, the user must set the conditions, and the conservative operation will be performed automatically without the user being aware of it. etc. will disappear. The same applies to timer settings and the like.

Effects of the Invention As described above, according to the present invention, even if there is a momentary power outage, or if the power outlet is unplugged by mistake or when moving from room to room, the microcomputer is powered from the bank-up power supply, so the various Necessary conditions and information are selectively stored and can be reset and reset by the user, resulting in a safe and easy-to-use combustion appliance. In addition, since the memory of the conditions that must be confirmed as a combustion appliance is lost, the user has to consciously reset the settings after returning from a stop, which further improves safety and usability.

[Brief explanation of drawings]

Fig. 1 is a microcomputer memory operation diagram of a control device in an embodiment of the present invention, Fig. 2 is a sectional view of the combustion appliance, Fig. 3 is a front view of its display section, and Fig. 4 is a front view of the operation section. Figure, 5th
Figure 6 is the control circuit diagram, Figure 6 is the backup voltage characteristic diagram, Figure 7 is the power supply circuit diagram of the microcontroller, Figure 8 is the power supply circuit diagram of the conventional microcontroller, and Figure 9 is the memory operation diagram of the same microcontroller. be. 4... Burner, 9... Microphone a computer, 10... Control circuit, 20...
Display device (display part).

Claims (1)

[Claims] A control device for a combustion appliance, comprising a microcomputer that controls combustion of a burner according to a combustion control program, and a backup power source for the microcomputer, the microcomputer having a condition storage section with memory and a condition storage section without memory.