JPS62297627A - Control device for burner - Google Patents

Abstract

PURPOSE:To prevent accidents from ocurring due to oxygen starvation so as to enhance the safety by illuminating all indicator elements certain time after an operation startup, turning off the indicator elements one by one at a certain interval, and stopping the operation of the burner after a certain time period of operation has elapsed. CONSTITUTION:90min after an operation startup, a signal to illuminate all indicators is outputted from a timer 30 to an indicator control circuit 18 through a buffer 31. Because of this, all indicators of a remaining operating hour indicator 18A are illuminated by the indicator control circuit 18 to indicate to users that the remaining operating time is 90min. Then, a turning-OFF signal is outputted from the timer 30 at every 10min to turn OFF the tell-tales of the indicator one by one at every 10min in order to indicate the remaining operating time. A counter 29, upon counting 9 of the turning-OFF signals from the timer 30, outputs an operation stop signal to the operation control circuit through a buffer 32.

Description

[Detailed Description of the Invention] 3. Detailed Description of the Invention (a) Industrial Application Field The present invention relates to a control circuit for a combustor, and more specifically, a control circuit for an indoor open type combustor such as a kerosene fan heater. Regarding.

(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 state such as oxygen deficiency.

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, and the user 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 stops the operation after a predetermined operating time has elapsed from the start of operation, and starts the remaining operating time from the elapse of a predetermined time shorter than the operating time. This is intended to improve safety and usability by displaying the information on a display.

(d) Means for solving the problem To this end, the present invention includes a first means (in the embodiment, a counter (29)) for generating a signal to stop the operation after a predetermined operation time has elapsed from the start of operation. , a second means (in the embodiment, a timer (30)) for generating a signal for changing the display of a display having a plurality of display elements at fixed time intervals, which displays the remaining operating time after a predetermined time shorter than the operating time has elapsed;
).

(*) When a predetermined period of time has elapsed since the start of operational operation, the second means outputs an all-lighting signal to the display device having multiple display elements to light up all display elements, and thereafter, for a predetermined period of time. The display elements are turned off sequentially as the time passes, and the first
The operation of the combustor is stopped after the specified operating time has elapsed.

(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 base plate (6) serving as the bottom plate of 1> is a burner that vaporizes and burns petroleum, which is provided via a support base (7) on the base plate (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 an air passage housing disposed inside the main body (1), and the front end communicates with the hot air outlet (3) and the rear end communicates with the air blower (4), and the air from the air blower (4) flows through the air passage case. It leads to the discharge port (3). (9) is a cylindrical combustion tube installed upright within the air passage case (8), and an exhaust gas outlet (10) is provided 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 air passage housing (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 power-on button provided on the main body (1), and when the button (13) is operated, the power switch (14) is closed. (15) is a power transformer, (16) is a rectifier circuit, (17A) is a display control circuit (18) for a remaining operation time indicator (18A), and performs various controls related to combustion in the combustor, and also has a timer function. A microcomputer is in charge of this control circuit. Also, the control circuit (
17A) is a room temperature setting device (19), a room temperature detector (20)
), a warm air blower (4), a supply air blower (23)
), an operation control circuit (17B) that controls the ignition device (24), fuel supply device (25), and 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.
B) The counter (29) and timer (30) built into the microcomputer can be reset to the initial state. The timer (30) outputs a full lighting signal to the display control circuit (18) via the buffer (31) when 90 minutes have elapsed from the start of operation by closing the power switch (14), and thereafter outputs a full lighting signal to the display control circuit (18). The indicator (
18A), which outputs a light-off signal to sequentially turn off the nine CD elements (L) constituting the device. Therefore, the user should check the remaining operating time indicator (18A) installed on the front of the combustor.
The remaining operating time can be easily confirmed by checking the lighting status of the I and CD display elements (L). counter (29)
sends an operation stop signal to the operation control circuit (17B) via the buffer (32) when the number of lights-off signals of the timer (30) reaches 9, that is, when 3 hours have passed since the start of operation. Output. Upon receiving this operation stop signal, the operation control circuit (17B) immediately switches on the fuel supply device (25).
After stopping the fuel supply and performing after purge for a predetermined time using a timer (not shown), the hot air blower (4),
Stop the air supply blower (23), etc.

It should be noted that a timer (
30) and the counter (29) are implemented by a microcomputer in this embodiment, but they are not limited to this and various configurations are possible. For example, this can be done using a timer motor, two cam plates, and two cam switches. That is, a timer motor is used to rotate two cam plates once every 3 hours, and one cam plate and a cam switch are used to operate the cam switch when the cam plate rotates once and send an activation signal. It can be used as an operation signal, and is activated by the other cam plate and the cam switch from 20 minutes after half a rotation of the cam plate.
This can also be done by activating the cam switch every time the cam switch is rotated and using the activation signal as a light-off signal.

The operation of the above configuration will be explained below.

First, when you press the power-on button (13), the power switch (10) closes and starts operation. At the beginning of operation, the burner temperature detector (21) detects that the temperature of the burner (6) is low, so The control circuit (17A) is the operation control circuit (1
7B) 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) and combustion air is supplied from the air supply blower (23) to the burner (6). The air-fuel mixture is ignited by the ignition device (24), and combustion by the burner (6) begins. Then, at approximately 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 (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.

Eventually, when 90 minutes have elapsed since the start of this operation, a full lighting signal is output from the timer (30) to the display control circuit (18) via the buffer (31). Therefore, the display control circuit (18) lights up all nine LCD display elements (L) of the remaining operation time display (18A) to inform the user that the remaining operation time is 90 minutes. From then on, the timer (30) outputs a light-off signal every 10 minutes, so the display (1) shown in FIG.
8A) LCD display element (L) every 10 minutes.
Turn off the lights one by one to notify you of the remaining driving time. That is, if three lights are lit, it is understood that the remaining driving time is 30 minutes.

Then, the counter (29) counts the number of lights-out signals from the timer (30), and when it reaches nine, the counter (29)
An operation stop signal will be output to the operation control circuit (17B) via. Therefore, when three hours have passed since the beginning of the operation, the operation control circuit (17B) immediately stops the fuel supply of the fuel supply device (25) if the combustion device is in the combustion state, and then turns on the combustion tube (9), etc. After performing afterbarge for a predetermined time using a timer (not shown) for cooling, the warm air blower (4), supply air blower (23), etc. are controlled to stop, and the room temperature detector (20) indicates that the room temperature is at the set temperature. When the fuel supply device (25), hot air blower (4), air supply blower (23), etc. are powered off, the combustion device stops combustion.

In addition, within 3 hours from the start of operation, the reset switch (27A) is activated by operating the operation button (27).
When it is instantaneously closed, a reset signal is output to the timer (30) and counter (29) of the control circuit (17A) via the buffer (28), resetting them to their initial states. Therefore, the display control circuit (18) is also reset,
All of the LCD display elements (L) of the display (18A) are turned off. Therefore, the timer (30) starts to add up one hour again, and operation becomes possible for another three hours, but the user only needs to ventilate sufficiently at the time of this reset.

(G) Effects of the Invention As described above, the present invention is capable of stopping operation after a predetermined operating time has elapsed from the start of operation, and displaying the remaining operating time on a display after a predetermined time shorter than the operating time has elapsed. This is what I did.

Therefore, the combustor does not stop unexpectedly, and the remaining operating time is announced and the operation is stopped after a predetermined time, so it can be used with peace of mind.

Furthermore, since the operating time is fixed, accidents caused by lack of oxygen can be prevented even if the device is used while sleeping or without ventilation, making it safe.

[Brief explanation of the drawing]

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, and FIG. 4 is a control circuit diagram of the present invention. (17A)...Control circuit, (18)...Display control circuit, (18A)...Remaining operating time indicator, (29)...
)...Counter, (30)...Timer. Applicant: Ohyo Electric Co., Ltd. and one other agent Patent attorney Takuji Nishino and one other person Figure 3 Figure 4

Claims (1)

[Claims] (1) A first means that generates a signal to stop the operation after a predetermined operating time has elapsed from the start of operation, and a display that displays the remaining operating time after a predetermined time shorter than the operating time has elapsed at regular intervals. A combustor controller comprising second means for generating a signal for changing the combustor.