JPS62294813A - Control circuit for combustion equipment - Google Patents

Abstract

PURPOSE:To permit a combustion equipment to be used without any anxiety, by a method wherein, operation progress indicating lamps are extinguished sequentially in every given time in the initial period of operation, then, said indicating lamps are flashed during a given period of time after the predetermined time while combustion is stopped after the given period of time has elapsed. CONSTITUTION:A timer control circuit 27 consists of an 1hr oscillation timer 28, which outputs a pulse in every elapse of 1hr, and a counter 29, which outputs a predetermined control signal based on the pulse of the timer 28. A plurality of operation progress indicating lamps 38-40 are all turned ON at the initial period of throwing a power source in and are extinguished sequentially by the control signal of the circuit 27. Further, an oscillating circuit 48 oscillates by the control signal of the circuit 27 upon elapsing the predetermined time to control the flashing of the indicating lamps 38-40. Another timer circuit 49 stops the flashing operations of the indicating lamps 38-40 after a predetermined time has elapsed from the time of input of the control signal upon elapsing said predetermined time and stops combustion. As a result, a combustion equipment may be used without any anxiety.

Description

[Detailed description of the invention] 3. Detailed description of the invention B) Industrial application fields The present invention relates to a control circuit for a combustor.

(B) Conventional technology Conventional indoor open combustion type combustors such as kerosene fan heaters are equipped with an ignition timer that automatically starts combustion after a set time, as shown in Japanese Patent Publication No. 59-52723. something is known. The ignition timer stops combustion approximately one hour after automatic ignition to prevent the interior of the vehicle from becoming in a dangerous situation such as a lack of oxygen.

However, in such conventional combustors, if the ignition timer operation is canceled before combustion is stopped by the ignition timer, or if the ignition timer is operated without using the ignition timer, combustion continues for a long time, causing the user to The combustion will not stop unless the engine is stopped or the combustion is empty. Therefore, if the driver falls asleep while driving, or if the vehicle is used by a child who is unable to operate the vehicle, there is a drawback that this may result in a dangerous situation such as a lack of oxygen.

(c) Problems to be Solved by the Invention In view of the above-mentioned points, the present invention provides a system for informing the user of the progress of operation by sequentially extinguishing a plurality of operation progress indicator lights that are all lit when the power is turned on at regular intervals. When a predetermined time has elapsed, the indicator light is blinked for a certain period of time, and combustion is allowed to stop after this certain period of time has elapsed, so that the combustor can be used with peace of mind.

(d) Means for solving the problem To this end, the present invention provides a one-hour oscillation timer (28) that outputs a pulse every hour, and the timer (28) ) (7) A timer control circuit (27) consisting of a counter (29) that outputs a predetermined control signal based on pulses, and a timer control circuit (27) that is all lit when the power is turned on and can be turned off sequentially by the control signal of the timer control circuit (27). Multiple driving progress indicator lights (38) (39)
) (40) and the timer control circuit (
27) is oscillated by the control signal of the indicator light (38) (
39) An oscillation circuit (48) that controls blinking of (40), and also stops the blinking operation of the indicator lights (38), (39), and (40) after a predetermined time has elapsed from the input of the control signal when the predetermined time has elapsed. It is composed of a timer circuit (49) that starts the combustion and also stops the combustion.

(N) Operation When 1 hour has passed after the power is turned on, the 1 hour oscillation timer (
Counter (29) receives the output from terminal 8 of
) continues to output the control signal from the terminal (PI), so among the indicator lights (38), (39), and (40) that were all lit, the indicator light (38) goes out. When the next hour passes, a control signal is output from the terminal (Pl) and the indicator light (39
) goes out, and when a control signal is output from the terminal (P, ) after one hour has elapsed, the indicator lights (3g), (39), and (40) blink by the oscillation circuit (48). When a predetermined period of time has elapsed since the control signal was output from this terminal (P,), the blinking operation and combustion are stopped by the output of the timer circuit (49).

(f) Example An embodiment of the present invention will be described in detail below with reference to the drawings.

(1) is the indoor open combustion type combustor main body, and its front (
IA) Multiple louver blades (2) (2)...
A hot air outlet (3) having... and a hot air blower (4) are disposed at the upper part of the back surface (IB). 5) is a stand serving as the bottom plate of the main body (1>), and (6) is a burner that vaporizes and burns petroleum, which is installed via a support stand (7) on the stand (5).The burner (6) The structure is such that combustion air and fuel are supplied through an air supply pipe and a fuel pipe (not shown).

(8) is an air duct pipe arranged inside the main body (1), the front end of which communicates with the hot air outlet (3) and the rear end of which communicates with the blower (4). It leads to the discharge port (3). (9) is a cylindrical combustion tube installed upright within the air pipe tube (8), and an exhaust gas outlet (10) is provided on the top surface. Reference numeral (11) denotes a blower guide plate that forms a cold air blower passage (12) on the upper side of the air blower tube (8), and is made of a metal plate and directs the exhaust gas from the outlet (10) to the outlet (3).
).

Next, a description will be given based on FIGS. 1 and 4. (13) is a power-on button that can be operated after opening the lid (14) on the top of the main body (1).
15), the display and combustion control circuit (16) becomes operational. (17) is a switch of a relay (30), which will be described later, which constitutes the control circuit (16), and when it is closed, power can be supplied to various combustion control devices (18) of the combustor. Therefore, when power is supplied, the room temperature setting device (19)
, room temperature detector (20), burner temperature detector (21)
In response to the output from the flame detector (22), the hot air blower (4
), air supply blower (23), combustion supply device (24).

It will control the ignition bag e (25) and the vaporization heater (26).

Next, the display and combustion control circuit (16) will be described in detail based on FIG. 4. (27) is a timer control circuit, which includes a one-hour oscillation timer (28) that outputs a pulse from terminal 8 every hour, and a timer (PI) that receives and counts pulses from the timer mark (28). pg ) (ps)
A counter (29) that outputs a higher level control signal
). (31) is the switch of the relay (30), and when it is closed, each terminal (PI > (
If the output of pg ) (P, ) is low level, each transistor (32) (33) (34) is non-conducting and another
If each transistor (35) (36) is non-conductive, each indicator light (3B) (39) of the operation progress display device (37)
(40) is a configuration that lights up.

When a high-level control signal is output from the terminal (P, ) of the counter (29), it is applied to the gate via the resistors (41) and (42), and the transistor (32) becomes conductive.
The indicator light (38) goes out. Furthermore, when a high-level control signal is output from the terminal (P,), it is applied to the gate via the resistors (43) and (44), and the transistor (33) becomes conductive.
The indicator light (39) goes out. After 3 hours have passed, the terminal (
When the high-level control signal is output from Pl), the transistors (45) and (46) become conductive, and the inverted output from the inverter (47) is applied to the oscillation circuit (48) and the timer circuit (49). be.

The oscillation circuit (48) includes a NOR circuit (50) whose one input terminal is connected to the inverter (47), and the circuit (50).
It consists of an inverter (51) connected to the output terminal of the NOR circuit (5), a capacitor (52), and resistors (53) and (54).
0). The connection point between the NOR circuit (50) and the inverter (51) is the resistor (5).
4> and to the gate of the transistor (35) via the connection point between the resistors (55) and (56) and the resistor (57). The timer circuit (49) has a resistance (58)<60).

It consists of a capacitor (59), a diode (61) and an inverter (62). Transistor (6
The gate of 5) is a resistor (64) and an inverter (63).
The emitter is connected to the inverter (62) through the relay (30), the emitter is grounded, and the collector is connected to the
connected to a tf source. When the relay (30) is energized, the switches (31) and (17) are closed.

Note that (66) is an instantaneous reset type reset switch, and when it is closed, the timer control circuit (27), that is, the one-hour oscillation timer (28) and counter (29) are reset and returned to the initial state.

The operation of the above configuration will be described below. First, when the lid (14) is opened and the power on button (13) is operated, the power switch (15) is closed and the display and combustion control circuit (16) is activated. Then, a VDD power source is generated and the timer control circuit (27) starts integration, but each terminal (P, )(P, )(P,
) output is low level. Therefore, the inverter (47
), the capacitor (59) of the timer circuit (49) is fully charged and the transistor (65
) is conductive and the relay (30) is energized, so its switches (17) and (31) are closed, and the combustion control device (18) is enabled to perform various controls related to combustion. . The output of the inverter (47) is at a high level, and the output of the NOR circuit (50) of the oscillation circuit (48) is at a low level and is inverted by the inverter (51).
2) starts charging, but even after charging, the output of the NOR circuit (50) remains at a low level, and the transistors (35) (36)
)(34) is non-conductive. Therefore counter (29)
The output of each terminal (PI > (Pl) (Pl) is also at a low level, and the transistors (32) and (33) are also non-conductive. ) are all lit.

Then, the relay (30) is energized and the switch (1
7) is in the open state, the combustion control device (18) is activated. That is, since the burner temperature detector (21) detects the low temperature of the burner, first, the vaporization heater (26) is energized to heat the burner body, and the supply air blower (23) is energized, and when the vaporization temperature is reached, the burner body is heated. The fuel supply device (24) and ignition device (25) are activated to ignite and burn. Thereafter, combustion will be controlled by a room temperature detector (20) or the like.

Eventually, one hour after the power is turned on, a pulse is output from terminal 8 of the one-hour oscillation timer (28), and the counter (29) receives this and outputs a high-level control signal from the terminal (p+). Output compliance. This causes the transistor (32) to become conductive and the top indicator light (38) to turn off, informing the user that one hour has elapsed. After another hour has passed, and 2 hours have passed since the beginning, the terminal (P
A high level control signal is also emitted from 2), the transistor (33) becomes conductive, and the indicator light (39) in the middle also turns off.
Notify the user that 2 hours have passed since the power was first turned on.

When one more hour has passed, and a total of three hours have passed, a high level control signal is output from the terminal (P,) of the counter (29). This signal is completely inverted by the inverter (47), and the NOR circuit (50) inputs a low level. Therefore, since the other input of the NOR circuit (50) was inputting a low level after charging the capacitor (52), it outputs a high level. Therefore, transistors (35) (36) (34)
conducts, and the indicator lights (38), (39), and (40) go out. A discharge circuit is formed between the capacitor (52), the resistor (54) < 53), the capacitor (52), and the impark (51). , the other input of the NOR circuit (50) becomes high level.Therefore, the output of the NOR circuit (50) becomes low level, so the transistor (35) (3
6) (34) becomes non-conductive, and the counter (2)
When a high-level control signal is output from the terminal (P, ) of 9), the transistors (45) and (46) become conductive, and both transistors (32 and 33) become non-conductive.
All indicator lights (38), (39), and (40) are turned on.

When the NOR circuit (50) outputs a low level, it is inverted by the inverter (51) and the capacitor (52) starts discharging, and when the discharge threshold level is exceeded, the NOR circuit (50) When the other input becomes low level, the NOR circuit (50) outputs a high level, transistors (35), (36), and (34) become conductive, and all indicator lights (38, 39, and 40) turn off. I will do it. In this way, the indicator lights (38), (39), and (40) flash based on the output of the oscillation circuit (48), informing the user that the time has come to stop combustion.

Also, since a high level control signal is output from the counter (29) and inverted by the inverter (47),
The capacitor (59) is connected to the resistor (58) and the inverter (4).
7), and the timer circuit (49) starts the timer operation. When the discharge ends after several minutes, the transistor (65) becomes non-conductive and the relay (30
) is excited and its switches (17) and (31) are opened. Therefore, the indicator lights (3B>(39), (40) all go out and stop blinking, and the combustion control device (18) stops its combustion-related control and stops combustion.Therefore, the user Understand that there has been a warning to ventilate the room, and just ventilate.

If the user operates the reset switch (66) while the timer circuit (49) is operating, the one-hour oscillation timer <28) and the counter (29) of the timer control circuit (27) are reset. Therefore, the pulses from each terminal (P, ), (p, ), (P3) of the counter (29) become low level, returning to the initial state, and combustion continues.

(G) Effects of the Invention As described above, the present invention sequentially turns off a plurality of operation progress indicator lights that are all lit at the beginning of operation at regular intervals to notify the user of the operation progress, and when a predetermined time has elapsed, the The combustor can be used safely by flashing the indicator light for a certain period of time and stopping combustion after this certain period of time has elapsed.

[Brief explanation of drawings]

Fig. 1 is a control circuit diagram of a combustor that employs the control circuit of the present invention, Fig. 2 is a perspective view of the combustor, Fig. 3 is a vertical side view of Fig. 2, and Fig. 4 is a control circuit diagram of a combustor of the present invention. Show each. (1)...Combustor main body, (16)...Display and combustion control circuit, (18)...Combustion control device, (27)...
)...Timer control circuit, (28)...1 hour oscillation timer, (29)...Counter, (30)...
...Relay, (37)...Driving progress display device, (
38) <39> (40)... Indicator light, (48)...
-Oscillation circuit, (49)...Timer circuit. Applicant: Sanyo Electric Co., Ltd. and one other agent Patent attorney Takuji Nishino and one other person Figure 2 Figure 3

Claims (1)

[Claims] (1) A timer control circuit that outputs a predetermined control signal according to time, a plurality of operation progress indicator lights that are all lit at the beginning of operation and can be turned off sequentially by the control signal of the timer control circuit, and an oscillation circuit that oscillates in response to a control signal from a timer control circuit to control blinking of the indicator light;
A control circuit for a combustor also includes a timer circuit that stops the blinking operation of the indicator light and stops combustion after a predetermined time has elapsed from the input of the control signal when the predetermined time elapses.