JP2001336746A - Combustion apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a combustion apparatus such as warm-air space heater, etc., in which a display of requirement for fuel supply can be visually recognized easily and clearly. SOLUTION: The apparatus is provided with a burner part 2 for conduct combustion, a float switch 19 for detecting that the fuel volume in the fixed tank 18 is at most a predetermined volume, and a color display 46. The display 46 displays in a first color that the apparatus is in the course of operation, or combustion operation, and it displays also in a second color that a remaining fuel is in a predetermined amount or less in response to signals from the float switch 19.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a combustion apparatus for burning fuel such as kerosene.

[0002]

2. Description of the Related Art Conventionally, in this kind of combustion equipment such as a fan heater, when the remaining fuel becomes low, a buzzer informs the user of the remaining fuel and turns on or blinks a refueling display on a liquid crystal display to refuel. In some cases, a predetermined time has elapsed without refueling, or a predetermined amount of fuel has been consumed and the fire is automatically extinguished.

[0003]

However, in this conventional apparatus, the display of the refueling reminder uses only a part of the area in the liquid crystal display unit, and the buzzer is generated because the remaining fuel is reduced. Even if the user sounds and turns his / her eyes on the combustion equipment, the display is small and inconspicuous, so it is not clear what caused the buzzer to sound, so it is not possible to take appropriate measures such as refueling immediately, If the buzzer sound could not be heard for some reason, the fire was automatically extinguished without any knowledge, which was inconvenient.

[0004]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention focuses on this point. In the present invention, the structure of the present invention is particularly defined as follows. And a second color indicating that the fuel is running or burning in a first color and that the remaining fuel amount is equal to or less than a predetermined amount according to a signal from the float switch. And a color display for displaying in color.

According to a second aspect of the present invention, there is provided the combustion apparatus according to the first aspect, further comprising detecting a lapse of a predetermined time or a predetermined amount of fuel consumption after receiving a signal from the float switch. An out-of-fuel extinguishing means for performing automatic fire extinguishing is provided, and the color indicator continues to display in the second color even after the extinguishing by the out-of-fuel extinguishing means.

According to a third aspect of the present invention, in the combustion apparatus according to the first or second aspect, the first color displayed by the color indicator is a backward color and the second color is a second color. The color was set as the advanced color.

[0007]

According to the first aspect of the present invention, a burner unit 2 for burning and a float switch 19 for detecting that the amount of fuel in a fixed tank 18 is less than a predetermined amount.
A color indicator for displaying in a first color that the vehicle is operating or burning, and displaying in a second color that the remaining fuel amount is equal to or less than a predetermined amount in response to a signal from the float switch 19. The color indicator 46 lights up an internal green LED 51 at the same time when the operation switch is turned on or when the combustion is started to indicate that the vehicle is operating or burning ( (Indicated by the first color), the fixed tank 1
8, the remaining fuel amount decreases and the float switch 1
When the LED 9 is turned on, the green LED 51 inside the color display 46 is turned off, and the red LED 50 is flashed slowly (displayed in the second color), and a color different from that in the normal operation is displayed. Therefore, it is possible to clearly notify that refueling is necessary.

According to the second aspect of the present invention, there is provided an out-of-fuel extinguishing means for automatically extinguishing the fire by detecting the elapse of a predetermined time or the consumption of a predetermined amount of fuel after receiving the signal from the float switch 19, Out-of-fuel fire extinguishing means 36
Even after the automatic fire extinguishing, the color indicator 46 flashes and displays the red LED 50 quickly (displayed in the second color), and the display continues until the operation switch 37 is turned off. The fire can be extinguished, and the fact that refueling must be performed can be reliably notified.

According to the third aspect of the present invention, the first color indicating that the color indicator 46 is operating or burning is a backward color having a visually backward action such as green or blue. In addition, since the second color indicating that the remaining fuel amount has decreased or the fire has been automatically extinguished due to running out of fuel is set to a visually advanced color such as red or yellow, the second color is used during operation or combustion. Can be displayed without visually annoying, and the fact that refueling has to be performed can be strongly notified to the eyes in a more conspicuous color and can be reliably notified.

[0010]

Next, an embodiment of the invention according to the present invention will be described with reference to the drawings.

1 is a hot air heater main body, 2 is an operation unit provided in the upper part of the front surface, 3 is a hot air outlet having a louver 4 for guiding hot air, and 5 is a hot air intake 6 on the back. A convection fan mounted via a fan guard 7, a blower box 8 communicating the warm air inlet 6 and the warm air outlet 3, 9 is a burner provided with a burner head 10 protruding into the blower box 8. Part 11 is the burner head 1
Reference numeral 12 denotes a heat shield plate disposed directly above the combustion cylinder 11 in the blower box 8.

The exterior body of the device main body 1 is constructed by fixing a front panel 13 covering the front surface, an upper surface plate 14 covering the upper surface, and a rear plate 15 covering the side surfaces and the back surface on a table 16. I have.

Next, 17 is a cartridge type tank for supplying liquid fuel such as kerosene, 18 is a fixed tank for temporarily storing the fuel from the cartridge type tank 17, 19
Is a float switch that is turned on when the amount of fuel in the fixed tank 18 becomes equal to or less than a predetermined amount, 20 is an electromagnetic pump that pressure-feeds the fuel in the fixed tank 18 to the burner unit 9 through an oil feed pipe 21 and an oil feed nozzle 22, and 23 is This is a combustion fan that blows combustion air through a blower tube 24.

Reference numeral 25 denotes a vaporizer for vaporizing liquid fuel; 26, a vaporization heater for heating the vaporizer 25 to a temperature at which the fuel can be vaporized; 27, a vaporization temperature sensor for detecting the temperature of the vaporizer 25; A flame hole network provided on the outer periphery of the head 8, a heat recovery ring 29 for recovering combustion heat to the vaporizer 25, an igniter 30 for spark discharge to a vaporized gas to ignite, and a frame 31 for monitoring the state of the flame It is a rod.

Reference numeral 32 denotes a control device for controlling the apparatus main body 1, which is constituted mainly by a microcomputer (not shown). Reference numeral 33 denotes an operation unit base provided on the operation unit 2, and various switches and display lamps provided on the operation unit 2 are connected to the control device 32 via the operation unit base 33.

Numeral 34 designates a timer for counting the time from the start of the operation and automatically extinguishing the fire after a lapse of a predetermined time (3 hours). 35 designates a means for starting the operation of the apparatus at a preset timer time. A timer means for automatically extinguishing the fire after a predetermined time (1 hour) has elapsed. When the remaining fuel amount becomes equal to or less than a predetermined amount, 36 starts counting the number of drive pulses of the electromagnetic pump 20, and the counted number of pulses becomes equal to or more than a predetermined value. This is a fuel-out fire extinguishing means that automatically extinguishes the fire. In addition, this fuel-out fire extinguishing means 36
Is a method for automatically extinguishing a fire after a lapse of a predetermined time after the remaining fuel amount has become equal to or less than a predetermined amount, or a second float indicating that the remaining fuel amount has become equal to or less than a second predetermined amount that is smaller than the predetermined amount. Automatic fire extinguishing by detecting with a switch may be used.

The operation unit 2 includes an operation switch 37 for instructing operation / stop of the device,
4, an extension switch 38 for resetting the count time of 4 and restarting counting for a predetermined time (3 hours), a timer switch 39 for operating the morning timer means 35, and an operation lamp provided near the operation switch 37. 40, a timer lamp 41 provided in the vicinity of the timer switch 39, a numeric display section 42 for displaying room temperature and time, a refueling character display section 43 for displaying characters of refueling, and when operating the switches, A buzzer 44 that emits a sound at the time of such a warning is provided, and the numerical display section 42 and the refueling character display section 43 are provided on a liquid crystal display 45.

Reference numeral 46 denotes a color indicator provided at a central portion between the operation unit 2 and the hot air outlet 3, which is illuminated in a backward color green with a backward action visually during driving, and a timer for forgetting to turn off. The fire extinguishing is announced by blinking green before a predetermined time before the automatic fire extinguishing by the means 34 and the good morning timer means 35, and when the remaining fuel amount becomes less than the predetermined amount and the fire is extinguished by the fuel exhaustion extinguishing means 36, a visual advance is made. By illuminating / flashing in red, which is an advanced color having an effect, the user is prompted to refuel in a more conspicuous color.

The color display 46 comprises a light emitting portion 47 for emitting light of two colors, red and green, and a diffusion lens 48 for diffusing the light of the light emitting portion 46 to the surroundings.

The light emitting portion 47 is formed by arranging three red LEDs 50 and three green LEDs 51 alternately in a ring on a light emitting portion base 49, and the light emitting portion 47 is located in the upper space of the blower box 8 in front of the upper surface plate 14. Front panel 1 attached to the rim
The claw portion 56 of the base mounting member 55 to which the light emitting unit base 49 is mounted is fixed to the hole 54 of the mounting bracket 53 hanging down from the lower end of the third mounting bracket / operating section mounting plate 52. The light emitting section board 49 is connected to a board (not shown) of the control device 32 by a lead wire.

The diffusion lens 48 is attached to an opening 57 provided at a position facing the light-emitting portion 47 of the front panel 13 by hooking a locking claw 58. The front side has a substantially hemispherical shape that rises smoothly from the periphery to the center so that it can protrude greatly so that it can be confirmed from the top surface, and the back surface is a quadrangular pyramid within a range slightly smaller than the periphery. A plurality of concave portions 59 are provided as a prism, and fine irregularities are provided by graining to form a diffusing surface 60 for uniformly diffusing light to the front side, and the light emitting portion 47 received on the back side is dispersed from a plurality of LEDs. The diffused light is substantially uniformly diffused to the hemispherical front side, so that the visibility from the front of the device is improved and the visibility from above and from the side is also improved.

As described above, the color display 46 is connected to the device main body 1.
Since the light-emitting portion 47 is divided into a light-emitting portion 47 on the side and a diffusion lens 48 on the side of the front panel 13 and the space therebetween is opened,
The heat generated in the light emitting section 47 is not trapped and the diffusion lens 48
In addition, it is possible to connect the lead wire of the light emitting unit 47 to the board of the control device 32 before mounting the front panel 13 and then mount the diffusion lens 48 to the front panel 13 during assembly. As a result, the unstable work of connecting the lead wires while holding the front panel 13 close to the device main body 1 side is eliminated, and assembling is facilitated and productivity is improved, and disassembly is improved by a reverse procedure. Therefore, the maintainability is also improved.

Next, the operation of this embodiment will be described with reference to FIGS.
A description will be given based on the flowchart of FIG.

First, when the operation switch 37 is depressed (Step 1, hereinafter abbreviated as S1), a buzzer 44 emits an audible confirmation sound "P" (S2).
When the operation lamp 40 provided in the vicinity is turned on and off slowly (0.
(5 seconds on / 0.5 seconds off) (S3), the energization of the vaporization heater 26 is started, and the preheating of the vaporizer 25 is started (S4). The blinking state of 40 indicates that the vaporizer 25 has entered the preheating state.

Next, when the vaporization temperature sensor 27 detects the ignitable temperature and the preheating is completed (S5), the green LED 51 of the color display 46 is turned on (S6) and the operation lamp 4 is turned on.
0 is changed from blinking to lighting (S7), and the combustion fan 2
3. The ignition operation is performed by driving the electromagnetic pump 20, the igniter 30, and the convection fan 5 (S8). In this manner, the color indicator 46 is lit in a backward color such as green or blue to indicate that combustion is being performed without visually annoying.

When the operation is started, the forgotten erase timer means 34 is operated to start counting the operation time (S
9) Then, it is checked whether the float switch 19 is turned on (S10).

In step S10, the fuel amount is changed to the float switch 1
If the count has not decreased to the level at which 9 turns on, it is checked whether the count time of the timer means 34 for forgetting to extinguish has reached 15 minutes before the fire extinguishing time (S11). A notification sound "PIP" is generated (S12), and the green LED 51 of the color display 46 is turned on and off slowly (2 seconds on / 1 second off).
(S13), and the character "OFF" blinks on the segment of the numeral display section 42 that displayed the room temperature (0.
(ON for 5 seconds / OFF for 0.5 seconds) (S14), and the buzzer 44
Sound and number display 42 by light and color display 46
Inform the user that the automatic fire extinguishing is near by the character display.

Then, when the count time of the forgotten fire timer means 34 reaches 10 minutes before the fire extinguishing time (S15),
The buzzer 44 generates an alarm sound "PPI" again (S16) to notify the user that the automatic fire extinguisher is near.

Further, if the count time of the timer means 34 for forgetting to extinguish reaches three minutes before the extinguishing time (S17), the buzzer 44 again emits an alarm sound "PPI" (S18), and Green L on display 46
Change the ED51 from a slow blinking cycle to a fast blinking cycle (1 second on /
It changes to 0.5 seconds off) and blinks (S19), so that the user can be notified visually and easily that the remaining time until automatic extinguishing has become short.

Then, when the count time of the timer for forgetting to extinguish the timer 34 counts the extinguishing time (S20), the buzzer 44 generates a notification sound "PPI" (S21) to sound that the automatic extinguishing is performed. The green LED 51 and the operation lamp 40 of the color display 46 are turned off (S22, S23), and the "OF"
"F" character display is changed from a blinking state to a lighting state (S
24) Then, the driving of the combustion fan 23, the electromagnetic pump 20, and the convection fan 5 is stopped to perform a fire extinguishing operation (S25).

After performing the fire extinguishing operation, the operation switch 37
Is turned off (S26), a buzzer 44 emits a confirmation sound "pip" for the off operation (S27), turns off the "OFF" character display on the numeric display section 42, and switches to a clock display (S28). In this manner, the display of the character "OFF" is continued until the operation switch 37 is turned off, so that it is possible to know that the operation of the device has been extinguished by the timer means 34 even after the fire has been extinguished.

Next, the case where the float switch 19 is turned on when the remaining fuel amount in the fixed tank 18 is equal to or less than the predetermined amount in S10 will be described. The buzzer 44 generates a beeping sound three times in succession ( S29), the green LED 51 of the color display 46 is turned off (S30),
At the same time, the red LED 50 of the color display 46 starts blinking at a slow blinking cycle (2 seconds on / 1 second off) (S31), and furthermore, the character "refueling" on the refueling character display section 43 blinks (1 second on / 0). .5 seconds off) to start (S32).

As described above, by changing the display on the color indicator 46 from the backward color green during normal operation to the forward color red, it is possible to visually and positively recognize that the remaining fuel amount has decreased. Easy to display, and buzzer 44
The sound by the color indicator 46, the light by the color display 46, and the display of the character "refueling" by the refueling character display part 43 surely inform the user that the automatic fire extinguishing due to running out of fuel is near and prompt the user to refuel.

Next, counting of the number of driving pulses of the electromagnetic pump 20 is started (S33), and it is determined whether or not the counted number of pulses is equal to or more than a predetermined value (S34). The predetermined number of pulses to be counted is set so that the fuel in the fixed tank 18 does not become completely empty, and the combustion can be continued for about 20 minutes in strong combustion and about 40 minutes in weak combustion.

When the counted number of pulses reaches a predetermined value (Yes in S34), the buzzer 44 generates a beep sound three times in succession (S3).
5), the red LED 50 of the color display 46 is changed from blinking at a slow cycle to blinking at a fast cycle (on for 1 second / off for 0.5 second) and starts blinking (S36), and the operation lamp 40 is further quickly turned on. After changing to a blinking state at a blinking cycle (0.2 seconds on / 0.2 seconds off) (S37), the user is notified in a visually easy-to-understand manner that automatic fire extinguishing due to running out of fuel is performed. 23, the electromagnetic pump 20 and the convection fan 5 are stopped to perform a fire extinguishing operation (S38).

After performing the fire extinguishing operation, the red LED on the color display 46 is maintained until the operation switch 37 is turned off.
50 and the operation lamp 40 and the refueling character display section 43, the characters "refueling" are kept blinking, so that the red LED 50 of the color indicator 46 continues to blink rapidly even after the operation ends, and Even when the user is not near the device main body 1, it is possible to clearly display that the operation has stopped due to running out of fuel even from a distant position, and it is possible to strongly complain that refueling is required. , Easy to use.

Next, when the operation switch 37 is turned off (S39), a confirmation sound "pip" for the off operation is generated (S40), and the red LED 50, the operation lamp 40 and the refueling character display section 43 of the color display 46 are displayed. Is turned off (S
41, S42, S43), when the user does not intend to refuel, the operation can be turned off by turning off the operation switch 37, so that the red LE of the color display 46 is displayed.
Even when the blinking display of D50 is visually annoying and disturbing, it can be easily handled.

As described above, the advance notice of the automatic fire extinguishing after the elapse of a predetermined time from the start of the operation is made by blinking the color indicator 46 in green (reverse color such as green or blue), and the remaining fuel amount is reduced. The warning of the automatic fire extinguishing due to the fact that the color indicator 46 flashes red (advancing colors such as red, yellow, etc.) to appeal to the sight strongly and to be able to call attention more aggressively, By confirming the color development, the cause of the advance notice of automatic fire extinguishing can be clearly understood, and the user can take appropriate measures such as pressing the extension switch 38 or performing refueling, which is convenient.

An operation lamp 40 is turned on (blinks) when the operation switch 37 is turned on, turned off when the operation switch 37 is turned off, and turned off to indicate that the vehicle is running. Color display 4 to give notice
6 is provided separately and independently, so that the operation of the operation switch 37 can be confirmed by the operation of the operation lamp 40 provided near the operation switch 37. Notice that this will be done
6, it is possible to easily confirm even from a distant place, and to display the current operating state of the device more and more clearly, which is very convenient.

Next, it is conceivable that the fire extinguishing timer 34 automatically extinguishes the fire within about 20 to 40 minutes from when the float switch 19 is turned on until the fire is extinguished.
The operation at this time will be described.

When the float switch 19 is turned on in S10, the buzzer 44 emits a three-tone beep sound.
The green LED 51 of the color display 46 that has been lit up until then is turned off (S30),
At the same time, the red LED 50 of the color display 46 starts blinking at a slow blinking cycle (2 seconds on / 1 second off) (S31), and furthermore, the character "refueling" on the refueling character display section 43 blinks (1 second on / 0). (Off for 5 seconds) (S32), and counting of the number of drive pulses of the electromagnetic pump 20 is started (S33).

Next, it is determined whether the counted number of pulses is equal to or greater than a predetermined value.
o), it is checked whether or not the time counted by the forgotten fire timer means 34 is 15 minutes before the fire extinguishing time (S4).
4).

If the count time of the forgotten fire timer means 34 is 15 minutes before the fire extinguishing time (Y in S44)
es) The buzzer 44 emits a notification sound "PIP" (S45), and the room temperature is displayed while the red LED 50 continues to blink slowly without changing the display of the color display 46. In the segment of the display section 42, “OF
The character "F" is displayed in a blinking manner (S46), and the user is notified that the automatic fire extinguishing by the timer means for forgetting to extinguish 34 is imminent.

Then, the process returns to S34, and the flow proceeds to S44 because the number of pulses has not reached the predetermined value. Since the result of S44 is NO, the flow proceeds to S47.
Check whether the count time of 4 is 10 minutes before the fire extinguishing time. 10 minutes before the fire extinguishing time, as in the case of 15 minutes before, the display of the color display 46 is not changed, and the buzzer 44 emits an alarm sound "PIP" while the red LED 50 continues to blink slowly. (S48) The user is notified that the automatic fire extinguishing by the timer for forgetting to extinguish 34 is near. The same applies three minutes before the fire extinguishing time.

When the count time of the forgotten-off timer means 34 reaches the fire-extinguishing time (S50), the buzzer 44 emits a notification sound "PPI" (S5).
1) The red LED 50 and the operation lamp 40 of the color display 46 are turned off (S52, S53), and the "OFF" character display of the number display section 42 is changed from blinking to lighting (S5).
4) If the user is notified that the automatic fire extinguishing is performed by the timer means 34, the combustion fan 23 and the electromagnetic pump 2
0, the convection fan 5 is stopped to perform a fire extinguishing operation (S5).
5).

After performing the fire extinguishing operation, the operation switch 37
Is turned off (S56), a confirmation sound "pip" is generated for the off operation (S57), and "OF"
"F" character display and refueling character display section 43 are turned off (S
58, S59). As described above, the “OFF” character display and the refueling character display portion 43 continue until the operation switch 37 is turned off.
After the fire is extinguished, it can be known that the fire has been extinguished and the remaining fuel amount has been reduced.

If the number of pulses of the electromagnetic pump 20 becomes equal to or more than a predetermined value before the fire extinguishing time of the forgetting to turn off timer means 34 comes after the alarm sound is emitted by the forgetting to turn off timer means 34 (S44 to S50). Is Yes in S34.
Then, the operations of S35 to S43 are performed, and the color indicator 46 is caused to blink in red at a fast blinking cycle, so that the fact that the operation has been stopped due to lack of fuel is clearly displayed even from a remote position.

In step S10, the float switch 19
Before turning on, the alarm sound is emitted by the forgetting to turn off timer means 34, and before the fire extinguishing time of the forgetting to turn off timer means 34 comes (S11 to S20), the remaining fuel amount decreases and the float switch 19 turns on (S10). In step S29, the color indicator 46 is blinked in a slow red blinking cycle to run out of fuel (Yes in S34) or three hours after the start of operation (Yes in S50), whichever is earlier. Perform fire extinguishing control.

As described above, even if the color indicator 46 starts blinking green once, when the remaining fuel amount becomes low, the color indicator 46 is changed to blinking red to indicate that the timer means 34 has been forgotten to be turned off. Is displayed on the color display 46 with priority given to the fact that the remaining fuel amount has become smaller than the fire extinguishing notice by the user, so that it is possible to reliably know that the remaining fuel amount has become smaller.

Further, when the fire is extinguished by the fuel exhaustion / extinguishing means 36, if the fuel is not supplied, it will immediately disappear even if the operation is started again. When the fire is extinguished by the timer means 34, the operation switch 37 is turned on again. By simply doing this, the operation can be started again and the operation can be continued without the need for another return operation, so that the color display 46 is turned off.

Next, the timer switch 39 is turned on,
The difference between the case where the good morning timer means 35 is set and the automatic fire extinguishing by the above-mentioned forgetting to extinguish timer means 35 will be described. S1 to S9 in FIG.
When the timer switch 39 is turned on (S60), a beep for confirming the ON operation is emitted from the buzzer 44 (S61) and the timer switch 39 is provided near the timer switch 39. Timer lamp 4
1 is turned on (S62).

When the time reaches the timer time (S6)
3) The operation lamp 40 is turned on and off slowly (0.5 seconds on /
(Off for 0.5 second) (S64), and the vaporizing heater 2
6 and the preheating of the vaporizer 25 is started (S6).
5) When the preheating is completed by detecting the temperature at which the vaporization temperature sensor 27 can ignite (S66), the green LED 51 of the color display 46 is turned on (S67), and the operation lamp 40 is changed from blinking to lighting (step S67). S68), the combustion fan 23, the electromagnetic pump 20, the igniter 30, and the convection fan 5 are driven to perform an ignition operation (S69).

Then, the counting of a timer for one hour from the start of the operation (referred to as a timer for forgetting to erase for convenience) is started. Thereafter, except that the count time of the forgetting to erase timer is one hour, it is the same as S10 and thereafter in FIG.

Incidentally, the morning timer means 35 is released by turning off the timer switch 39, and is not released by turning off the operation switch 37. When the timer time of the next day comes, the steps from S63 are repeated. It works.

[0055]

As described above, according to the present invention, the color display displays the second color different from the first color during normal operation when the remaining fuel amount is equal to or less than the predetermined amount. If it is possible to easily notify that fueling is necessary, and to continue displaying the second color different from the first color during normal operation even after automatic fire extinguishing due to running out of fuel, the cause of automatic fire extinguishing may be due to running out of fuel. This makes it possible to clearly recognize a certain thing from a remote position, and is convenient.

The first color indicating that the vehicle is operating or burning is a backward color having a visually retreating action such as green or blue. Since the second color indicating that the fire was automatically extinguished was set to an advanced color having a visually advancing action such as red or yellow, it can be displayed without visually annoying that the vehicle is driving or burning. At the same time, the fact that refueling has to be performed can be surely notified by strongly appealing to the sight with more easily visible colors.

[Brief description of the drawings]

FIG. 1 is an external perspective view of a hot air heater according to one embodiment of the present invention.

FIG. 2 is a sectional view of the main body.

FIG. 3 is a sectional view of the combustion system.

FIG. 4 is a front view of the operation unit.

FIG. 5 is a configuration diagram of the control system.

FIG. 6 is a front view of the display board in an attached state.

FIG. 7 is an explanatory diagram of the diffusion lens.

FIG. 8 is a flowchart showing the operation.

FIG. 9 is a flowchart showing the operation.

FIG. 10 is a flowchart showing the operation.

[Explanation of symbols]

 9 Burner section 18 Fixed tank 19 Float switch 36 Out-of-fuel fire extinguishing means 46 Color indicator

Claims (3)

[Claims] 1. A burner section for performing combustion, a float switch for detecting that a fuel amount in a fixed tank is equal to or less than a predetermined amount, and displaying that the fuel cell is operating or burning in a first color. A color indicator for displaying in a second color that the remaining fuel amount is equal to or less than a predetermined amount in response to a signal from the float switch. 2. The combustion device according to claim 1, wherein:
The system further includes a fuel-out fire extinguishing unit that automatically extinguishes the fire by detecting the passage of a predetermined time or the consumption of a predetermined amount of fuel after receiving a signal from the float switch, and the color indicator is automatically extinguished by the fuel-out extinguishing unit. A combustion apparatus characterized in that the display in the second color is continued even after the combustion. 3. The combustion apparatus according to claim 1, wherein the first color displayed by the color indicator is a backward color, and the second color is an advanced color. And combustion equipment.