JPS633128A - Control circuit for burner - Google Patents

Abstract

PURPOSE:To urge an user to perform ventilation and permit a burner to be used without any anxiety, by a method wherein the operation of the burner is stopped automatically by a timer device after a predetermined time from starting the operation of the burner while an informing device is operated to inform the elapse of the operating time of the burner based on the control signal of the timer device. CONSTITUTION:A control circuit 17A, which outputs control signals in every predetermined times after starting the operation of a burner and is provided with the function of a timer device, is provided in the title control circuit. The operation of the burner is stopped automatically after a predetermined time from the starting thereof by the control circuit 17A. When the operation is desired to be continued before stopping, a reset switch 27A is closed instantaneously whereby the control circuit 17A is reset to the initial condition thereof. An information device 18 is operated in every predetermined times after starting the operation of the burner to inform an user the elapsed time of operation and urges to perform ventilatation. According to this method, the generation of accident may be prevented and the safety of the burner may be improved further.

Description

DETAILED DESCRIPTION OF THE INVENTION (A) Field of Industrial Application The present invention relates to a control circuit for a combustor, and more specifically to a control circuit for an indoor open type combustor such as a kerosene fan heater.

(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 operation is allowed without using the ignition timer, combustion continues for a long time, making it difficult for the user to Combustion will not stop until operation is stopped or the fuel 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 points, the present invention automatically stops the operation of the combustor after a certain period of time from the start of operation using a timer device, and also uses a timer device to automatically stop the operation of the combustor based on the control signal of the timer device. The purpose is to allow the user to use the device with peace of mind by enabling the operation of the notification device and notifying the user of the elapsed operating time and urging the user to ventilate the device.

(d) Means for solving the problem To this end, the present invention provides a control circuit (as a timer device) that outputs a control signal at predetermined intervals from the start of operation and stops the operation of the combustor after a certain period of time. 17A) and
A reset switch (27A) as an operation continuation device that can be manually operated before the control circuit (17A) stops the operation and continues the operation, and a reset switch (27A) that operates based on the control signal of the control circuit (17A) and operates. It is composed of a notification device (18) that notifies the passage of time.

(E) The operation control circuit <17A) automatically stops the operation of the combustor after a certain period of time from the start of operation, and if you want to continue operation before this stop, you can use the reset switch (27A).
If A) is instantaneously closed, the control circuit (17A) is reset to the initial state. In addition, the notification device (18) is activated every predetermined time period after the start of operation, so that the user can be informed of the elapsed time of operation and urged to ventilate.

(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)...
There is a hot air outlet (3) having a hot air outlet (3) and a hot air blower (4) at the upper part of the back surface (IB). (5) is the main body (
The stand (6) serving as the bottom plate of 1) is a burner that vaporizes and burns petroleum, which is provided via the support stand (7) on the stand (5). The burner (6) is configured to be completely supplied with combustion air and fuel via an air supply vibe and a fuel pipe (not shown).

(8) is an air duct installed in 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 vertically in the air flow path (8), and an exhaust gas outflow III (10) is provided on the upper surface. (11) is a blower guide plate that forms a cold air blower passage (12) on the upper side of the air passage flow (8), and is made of a metal plate and directs the exhaust gas from the outlet (10) to the discharge outlet (3). It leads to

Next, a description will be given based on FIGS. 1 and 4. (13) is a manually operable power-on button provided on the main body (1), and when the button (13) is operated, the power switch (14) is closed. (15) is '#, source tositrans 16) is a rectifier circuit, (17A) is a notification device (18) that urges ventilation and notifies the passage of operating time, and various controls related to combustion in the combustor. This is a control circuit that also has a timer unit, and a microcomputer is in charge of this. The control circuit (17A) also includes a room temperature setting device (19).
), the warm air blower (4) receives the outputs of the room temperature detector (20), the burner temperature detector (21), and the flame detector (22).
, an operation control circuit (17B) that controls the air supply blower (23), the ignition device (24), the fuel supply device (25), and the vaporization heater (26). The notification device (18) is composed of a buzzer device including a buzzer circuit or a display device such as a mechanical lamp.

Next, the control circuit <17A) will be described in detail based on FIG. A case will be described below in which the notification device (18) is constituted by a buzzer device. (27A) is an operation button (27A) that is installed on the front of the combustor and serves as an instruction device to continue operation.
7) A reset switch that closes instantaneously when operated. When closed, the external reset circuit (28), which can be built into the microcomputer via the buffer (33), and the counter (2)
9), timer A (30) and timer B (31) are reset to their initial states. Timer A (30) sends a control signal to timer B (31) and counter (
29). When the timer B (31) receives the control signal from the timer A (30), it turns on the buzzer device (1).
8), outputs a signal to sound for a predetermined period of time, for example, 5 seconds, via the buffer (32).When 3 hours have elapsed, the counter (29) outputs a signal to the timer C (34) and the combustion stop timer (35). It outputs a 3-hour elapsed signal and also outputs a signal to stop the output of timer B31). The timer C (34) outputs a drive signal to the buzzer device (18) for two minutes via the buffer (36), and the timer (35) outputs a drive signal to the operation control circuit (17B) via the buffer (37). Outputs a stop signal after 1 minute.

When the operation control circuit (17B) receives this operation stop signal, it immediately stops the fuel supply from the fuel supply device 25) if the burner (6) is in a combustion state, and performs after-purging for a predetermined period of time using a timer (not shown). After doing this, stop the hot air blower (4), air supply blower <23), etc. In addition, when the room temperature has reached the set temperature according to the room temperature detector <20) and the burner (6) has stopped combustion, the fuel supply device (25), hot air blower (4), m
(23) etc. is controlled to cut off the power supply.

The buzzer device (18) is configured to ring for a predetermined period of time, for example, 5 seconds, depending on the output from the timer B (31) or the output from the timer C (34).

The operation of the above configuration will be explained below.

First, when the power-on button (13) is pressed, the power switch 14) closes to start operation. At the beginning of operation, the burner temperature detector (21) indicates that the burner (6) temperature is low.
The control circuit (17A) is detected by the operation control circuit (17A).
17B>, the vaporization heater (26) is energized. When the detector (21) detects that the burner (6) has reached the vaporization temperature, fuel is supplied from the fuel supply device (25) and combustion air is transferred from the air supply blower (23) to the burner (21).
The air-fuel mixture is ignited by the ignition device (24), and combustion begins by the burner (6). The hot air blower (4) is then energized approximately at the same time or slightly after the start of combustion, and the exhaust gas rising through the 1JF gas outlet (10) of the combustion tube (9) is guided by the blower guide plate (11). The air is supplied into the room from the discharge port (3) to heat the room. After that, the room temperature setting device (19) and the room temperature detector (20) are used to perform combustion according to the difference between the set temperature and the detected temperature.
It stops combustion and maintains a constant indoor temperature.

When one hour has elapsed since the start of this operation, timer A (30) outputs a signal to timer B (31) and counter (29) indicating that one hour has elapsed. Therefore, the timer B (31) outputs for 2 minutes via the buffer γ (32), but the buzzer device (18) sounds for 5 seconds to inform the user that 1 hour has passed, and the counter (29) starts counting. do. Therefore, the user is encouraged to ventilate the room and only needs to do so.

Another hour has passed, and 2 hours have passed since the beginning of the operation.4-
The timer B (31) causes the buzzer device (18) to sound for 5 seconds to notify the user that 2 hours have elapsed, and the counter (29) remembers that the signal has been input twice.

When another hour has passed, and a total of three hours have passed, a signal is output from the counter (29) and timer B (3
1), the timer C (34) is activated to make the buzzer device (18) sound for only 5 seconds, and the combustion stop timer (35) is activated. Therefore, the user knows that three hours have passed since the start of operation, and also understands that combustion will stop in two minutes. Therefore, the user should provide ventilation and, if necessary,
The reset switch (27A) is closed by operating the operation button (27) within a period of 28 minutes, and the external reset circuit is closed (28).
Counter (29), timer A (30) and timer B
(31) can be reset to the initial state. Therefore, the timer C (34) and the combustion stop timer (35) are also reset, and combustion continues. Therefore, timer A (30) and the like start saving the timer time again.

In addition, if the operation button (27) is not operated,
The combustion stop timer (35) outputs an operation stop signal to the operation control circuit (17B) via the buffer <37).
The operation control circuit (17B> immediately starts the fuel supply system (2).
After stopping the fuel supply in step 5) and performing afterbarge for a predetermined time using a timer (not shown) to cool the combustion tube (9), etc., the hot air blower (4), supply air blower (23), etc. are turned on. Control to stop. Notification device! (
18) is configured with a display, the timer
For example, the light may be turned on for 2 minutes when the time and 2 hours have elapsed, and it may be made to blink for 2 minutes when 3 hours have elapsed.

(G) Effects of the Invention As described above, the present invention automatically stops the operation of the combustor after a certain period of time from the start of operation, and if necessary, starts the operation before this stop! ! Operate this combustor by operating the control device! ! In addition, the system notifies the user of the elapsed operating time since the start of operation by activating an alarm device and urges the user to ventilate the vehicle, thereby preventing accidents from occurring and further improving safety costs and costs. .

[Brief explanation of drawings]

Fig. 1 is a control circuit diagram of the entire combustor, Fig. 2 is a perspective view of the combustor, Fig. 3 is a vertical side view of the combustor, Fig. 4 is a control circuit diagram of the present invention, and Fig. 5 is a control circuit diagram of the present invention. FIG. 3 is a flowchart diagram showing the operation of the control circuit. (17A)...Control circuit, (18)...Notification device, (27A)...Reset switch, (29)...
... Counter, (30) ... Timer A,
<31)...Timer B, (34)...Timer〇, <35)...Timer for combustion stop. Applicant Sanyo Electric Co., Ltd. and one other agent Patent attorney Takuji Nishino and one other person Figure 2 Figure 3 S 31 17A Figure 5

Claims (1)

[Claims] (1) A timer device that outputs a control signal at predetermined intervals from the start of operation and stops the operation of the combustor after a certain period of time; and a timer device that is manually operated before the timer device stops the operation to stop the operation. A continuous operation instruction device,
A control circuit for a combustor, comprising a notification device that is activated based on a control signal from the timer device to notify the elapse of operating time.