JPS633121A - Control circuit for burner - Google Patents

Abstract

PURPOSE:To improve safety, by a method wherein the operation of a burner is stopped automatically by a timer device after a predetermined time from the starting of the operation and an user is urged to ventilate air every time when predetermined operating times have elapsed from the starting of the operation of the burner. CONSTITUTION:A control circuit 17A effects various controls in reference to a ventilation instructing indicator 18 as a ventilation instructing alarm to promote to ventilate and the combustion of a burner and is provided with the function of a timer, which is charged by a micro-computer. The operation of the burner is stopped automatically by the control circuit 17A after a predetermined time from the starting of the operation of the burner. When the operation is desired to be continued before stopping the operation of the burner automatically, a reset switch 27A is ciosed instantaneously whereby the control circuit 17A is reset into the initial condition thereof. Ventilation can be promoted by operating the ventilation instructing indicator 18, which informs that the ventilation is to be effected in every elapse of predetermined times from the starting of the operation, and informing the time of elapse of the operation. According to this method, safety of the burner may be improved.

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 oil 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 uses a timer device to automatically stop the operation of the combustor after a certain period of time from the start of operation, and to reduce the operating time from the start of operation. The purpose is to encourage the user to ventilate as the process progresses, further improving safety.

(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 to the open can at a predetermined time 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 instructing device that is manually operated before the control circuit (17A) stops the operation to continue the operation, and the control circuit (17A).
ventilation instruction alarm (1) that operates based on the control signal of
8).

(n) 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. Since I started driving again,
By activating the ventilation instruction alarm (18) that notifies the user that ventilation is required every predetermined time period, it is possible to notify the user of the elapsed operating time and to encourage ventilation.

(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). Reference numeral (5) denotes a pedestal serving as the bottom plate of the main body 1), and numeral (6) denotes a burner for vaporizing and burning oil, which is provided via a support pedestal (7) on the pedestal (5). The burner (6) is configured to be supplied with combustion air and fuel via an air supply vibe and a fuel pipe (not shown).

(8) is the air blower installed inside the main body (1), and the front end communicates with the hot air outlet (3) and the rear end communicates with the blower (4), and the air from the blower (4) is communicated with the blower (4). It leads to the discharge port (3). (9) is a cylindrical combustion tube installed vertically within the air blowing amount (8), and an exhaust gas outlet (10) is completely opened on the upper surface. Reference numeral (11) denotes a blower guide plate that forms a cold air blower passage (12) on the upper side of the blower foot amount (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 manually operable M, 7# input button provided on the main body (1), and the power switch (14) is turned on by operating the button (13).
) is closed. (15) is a power transformer, (16) is a rectifier circuit, (17A) is a ventilation instruction indicator (18) that serves as a ventilation instruction alarm that prompts ventilation, and various controls related to combustion in the combustor. This control circuit also has a timer function, and a microcomputer is in charge of this. The control circuit (17A) also includes a room temperature setting device (17A).
9), room temperature detector (20), burner temperature detector (21)
In response to the output from the flame detector (22), the hot air blower (4
), an operation control circuit (17B) that controls an air supply blower (23), an ignition device (24), a fuel supply device (25), and a vaporization heater (26).

Next, the control circuit (17A) will be explained in detail based on FIG. 4. (27A) is a reset switch that instantaneously closes when the operation button (27) is operated as an operation continuation instruction device provided on the front of the combustor, and when it is closed, the buffer (
External reset circuit (28), counter (29), and timer A that can be built into the microcomputer via 33)
(30) and timer B (31) are reset to their initial states. Timer A (30) is connected to the power switch (1).
A control signal is output to timer B (31) and counter <29) every hour after the start of operation due to opening of step 4). When the timer B (31) receives the control signal from the timer A (30), the timer B (31) buffers a signal to cause the ventilation instruction display 18) to turn on for a predetermined period of time, for example, 2 minutes.
32). When three hours have elapsed, the counter (29) outputs a three-hour elapsed signal to the flashing timer (34) and combustion stop timer (35), and also outputs a signal to stop the output of timer B (31). The timer (34) outputs a blinking signal to the ventilation instruction display (18) for two minutes via the buffer (36), and the timer (35) outputs a blinking signal to the operation control circuit (17B) via the buffer (37). Outputs an operation stop signal after 2 minutes.

When the operation control circuit (17B) receives this operation stop signal, it immediately allows the fuel supply device (25) to stop the fuel supply if the burner (6) is in the combustion state, and afterbarges for a predetermined time using a timer (not shown). After this, the hot air blower (4), air supply blower (23), etc. are stopped. 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), supply air blower (
23) etc. is controlled to cut off the power supply.

The ventilation instruction display (18) may be arranged near the printed characters "1 ventilation" as shown in FIG. You may also turn on the indicator light at the back of the display board (18B) that has a printed message that says 1 ventilation is required as shown in Figure 7. The characters may be composed of an LCD display element (18C) and lit, but the display is not limited to lighting and may be blinking.

The operation of the above configuration will be explained below.

First, when the power on button (13) is pressed, the power switch (14) is closed and operation begins. At the beginning of operation, the burner temperature sensor detects that the burner (6) temperature is low21)
The control circuit (17A) is detected by the operation control circuit (17A).
17B) to energize the vaporization heater (26). When the detector (21) detects that the burner (6) has reached the vaporization temperature, fuel is supplied from the fuel supply device (25) for air supply! Combustion air flows from <23> to the burner (6)
The mixture is completely ignited by the ignition device t (24), and combustion by the burner (6) begins. Then, approximately at the same time or slightly after the start of combustion, the hot air blower (4) is energized, and the exhaust gas rising through the exhaust gas outlet port 10) of the combustion tube (9) is guided by the air guide plate (11) and discharged. It is supplied into the room from the outlet (3) and heats the room. Thereafter, the room temperature setting device (19) and the room temperature detector (20) perform combustion or stop combustion depending on the difference between the set temperature and the detected temperature, thereby keeping the indoor temperature constant.

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) lights up the ventilation instruction display (18) for 2 minutes via the buffer (32), notifying the user that one hour has elapsed, and also turning on the counter (29).
) is counted. Therefore, the user is encouraged to ventilate the room and only needs to do so.

When 1 hour has passed and 2 hours have passed since the start of operation, the ventilation instruction display (18) changes to 2 by the timer B (31).
It lights up for only one minute to inform the user that two hours have elapsed, and the counter (29) also remembers that the signal has been input twice.

When another hour has passed, totaling three hours, the counter (29) stops outputting the signal and the timer B (3
The output of step 1) is stopped, and the flashing timer (34) is activated to cause the ventilation instruction display (18) to flash for two minutes, 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 ventilate the room and, if necessary, close the reset switch (27A) by operating the operation button (27) during these two minutes, and then close the reset switch (27A) by operating the operation button (27) during these two minutes. (30) and timer B (31) can be reset to their initial states. For this reason, the flashing timer (34) and combustion stop timer mark 35) are also reset, and the ventilation instruction indicator (18) is reset.
The flashing operation will also stop and combustion will continue. Therefore, timer A (30) and the like start integrating the timer time again. If the operation button (27>) is not operated, the buffer (37) will be activated from the combustion stop timer (35>).
An operation stop signal is output to the operation control circuit (17B) via the operation control circuit (17B), and the operation control circuit (17B) immediately stops the fuel supply of the fuel supply device (25), and then the combustion tube (9
) etc., after purge is performed for a predetermined period of time using a timer (not shown), the hot air blower (4), the air supply blower (23), etc. are controlled to be stopped.

(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, operates the operation continuation instruction device before stopping the combustor. Operation can be continued, and the ventilation instruction alarm is activated based on the signal from the timer device to urge the user to ventilate every predetermined period of time from the start of operation, thereby improving safety by one degree.

[Brief explanation of the drawing]

Fig. 1 is a control circuit diagram for 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, Figs. 7 and 7 are diagrams showing respective embodiments of the ventilation instruction indicator, and FIG. 8 is a flowchart showing the operation of the control circuit of the present invention. (17A)... Control circuit, (18)... Ventilation instruction indicator (ventilation instruction alarm), (27A)... Reset switch, (29)... Counter, (30)
...Timer A, (31) ...Timer B,
(34)...Timer for blinking, (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 Figure 1) / Figure 5 @ Figure 6 Figure 8C

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 combustor control circuit comprising a ventilation instruction alarm that operates based on a control signal from the timer device.