JPH09318059A - Burning appliances - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] To improve the usability when detecting refueling without increasing the cost. SOLUTION: A timer 18 for counting a combustion time after a liquid fuel remaining amount detector 2 detects a predetermined remaining amount level.
The combustion stopping means 19 that operates when the timer 18 reaches a predetermined value, and the remaining amount detector 2 that operates after the predetermined remaining amount level is detected, and the frequencies are sequentially changed with the passage of time of the timer 18. The fuel supply lamp control means 20 that blinks the fuel supply lamp 21 so as to be faster is provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combustion appliance such as a petroleum fan heater provided with a refueling lamp for indicating the remaining amount of liquid fuel in a tank.

[0002]

2. Description of the Related Art In combustion appliances such as oil fan heaters, it is well known that a refueling lamp is turned on to notify when the amount of kerosene in the tank decreases during combustion. For example, in the combustion device disclosed in Japanese Patent Laid-Open No. 61-1921, a float switch for detecting the oil level is provided in the fixed tank, and when the kerosene in the cartridge tank becomes empty and the kerosene is no longer supplied, the fixed tank Since the oil level of the oil decreases, the lamp and buzzer are used to notify the user that the amount of remaining kerosene is low. This notification continues for about one hour, during which the refueling lamp is turned on. 1
If kerosene is not supplied even after a lapse of time, combustion is stopped, but immediately before this, a buzzer sounds or a refueling lamp blinks to give an alarm to the user. This alarm allows the user to refuel and continue combustion.
However, the user may not be aware of the warning only once, and often the combustion is stopped after a lapse of time.

As a solution to such a problem,
There is a combustion instrument disclosed in Japanese Utility Model Publication No. 56-4763. In this device, when the amount of remaining kerosene decreases, the remaining time during which combustion is possible is displayed on the numerical display for clock display.
Therefore, even when the amount of remaining kerosene decreases, the user can always use the fuel while watching the remaining combustion time, so that the timing of refueling can be freely selected according to the state of use.

[0004]

The above-described conventional burning appliances have the following problems. (A) In the case where the refueling lamp notifies the decrease in the amount of remaining kerosene, the remaining combustion time is unknown, so the timing of refueling may be missed and combustion may stop, causing odors, Room temperature drops and usability is poor. (B) A device that displays the remaining combustion time is convenient, but it requires a display device for displaying numbers, which increases the cost.

[0005] The present invention has been made to solve the above problems, and without increasing the cost.
The purpose is to obtain a convenient burning appliance that allows the timing of refueling to be freely selected according to the usage condition.

[0006]

A combustor according to the present invention comprises a combustor for combusting a liquid fuel, a tank for storing the liquid fuel fed into the combustor, and a remaining amount of the liquid fuel in the tank. A remaining amount detector that detects the level, a timer that counts the combustion time by the combustor after the predetermined remaining amount level is detected by the remaining amount detector, and operates when the value of this timer reaches a predetermined value Combustion stopping means, and a fuel supply lamp control means for operating the fuel level detector after the detection of the predetermined level and for causing the fuel supply lamp to blink so that the frequency sequentially increases with the passage of time of the timer. is there.

Further, a combustor for burning the liquid fuel, a tank for storing the liquid fuel fed to the combustor, a residual quantity detector for detecting the residual quantity level of the liquid fuel in the tank, and a residual quantity detector The calculation means for calculating the cumulative combustion amount after the detection of the predetermined remaining amount level by the amount detector, the combustion stopping means for operating when the calculation means reaches a predetermined value, and the remaining amount detector for setting the predetermined remaining amount. An oil supply lamp control means is provided which operates after the amount level is detected and blinks the oil supply lamp so that the frequency is sequentially increased as the cumulative combustion amount is increased by the arithmetic means.

Further, the alarm means such as a buzzer is activated each time the blinking frequency of the refueling lamp changes.

Furthermore, the time interval at which the blinking frequency of the refueling lamp changes is shortened as the timer elapses or the cumulative combustion amount of the computing means increases.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION

Embodiment 1. FIG. 1 is a sectional view showing the structure of a combustor of a generally well-known combustion instrument, and FIG. 2 is a first embodiment of the present invention.
FIG. 3 is a block diagram showing a control configuration of the above-mentioned combustion appliance showing
Is a flow chart showing the control operation, and FIG. 4 is a time chart of this operation.

In FIG. 1, 1 is a tank for storing a certain amount of kerosene as liquid fuel, 2 is a residual quantity detector for detecting the residual quantity level of kerosene in the tank 1, and 3 is a float of the residual quantity detector 2. Is. A magnet is included in the float 3, which responds to the fluctuation of the oil level in the tank 1 to move up and down to open and close the switch contact of the remaining amount detector 2 at a certain remaining amount level.

Reference numeral 4 is a cartridge tank for supplying kerosene into the tank 1, 5 is an electromagnetic pump for pumping kerosene in the tank 1, 6 is an oil supply pipe, 7 is a vaporizer containing a heater 8,
Reference numeral 9 is a thermistor that detects the temperature of the carburetor 7, and 10 is a blower that sends primary air and secondary air for combustion. Tank 1
The kerosene supplied from the oil supply pipe 6 from the above is mixed with the primary air and enters the vaporizer 7 which is kept at a high temperature in advance to be vaporized gas.

Reference numeral 11 is a spark plug for igniting this vaporized gas, 12 is a burner head for forming a flame, and 13 is a combustion cylinder. Further, in FIG. 2, 14 is an operation switch for operating the combustor 15, 2a is a switch contact of the remaining amount detector (hereinafter referred to as a float switch), 16 is an input signal determination unit for determining these signals, and 17 is this A control unit that controls the combustor 15 based on the input signal, 18 is a timer that starts counting by a signal from the control unit 17 when the float switch 2a is turned off, and 19 is a timer 18
Is a combustion stopping means for stopping the combustion when a predetermined value is reached, 20 is a fueling lamp control means for operating when the timer 18 starts counting and blinking a fueling lamp 21 formed of an LED, and 22 is a timer 18 for the lapse of time. It is a buzzer as a warning means for issuing a warning. In this case, the input signal determination unit 16, the control unit 17, the timer 18, the combustion stopping unit 19, and the refueling lamp control unit 20 are generally composed of a microcomputer 23.

Next, the operation will be described with reference to the flowchart of FIG. First, when the operation switch 14 is turned on with the kerosene in the tank 1 being sufficient (when the float 3 is in the position indicated by the solid line), the combustion operation is started (step 31). The combustion operation starts by energizing the heater 8 to raise the vaporizer 7 to a predetermined temperature. When the carburetor 7 reaches a predetermined temperature, the electromagnetic pump 5 operates to send kerosene into the carburetor 7, which is mixed with the primary air from the blower 10 to be vaporized and ignited by the ignition plug 11 and burner head 12 Forms a flame on. If the kerosene in the cartridge tank 4 runs out during combustion, the oil level in the tank 1 will drop.

When the oil level of the float 3 is lowered to the position of the broken line, the float switch 2a is turned off and a signal that the amount of remaining kerosene is small is sent to the control section 17 (step 32). This signal causes the control unit 17 to start counting by the timer 18 (step 33). When the timer 18 starts, the buzzer 22 is turned on for a short time, and at the same time, the refueling lamp control means 20 causes the refueling lamp 21 to slowly blink at 0.5 Hz (steps 34 and 35). This reduces the amount of kerosene for the user, and about 1 if not refueling.
Notify that the combustion will be stopped after a certain time.

When the timer 18 has passed 30 minutes (step 36), the buzzer 22 sounds again and the refueling lamp 21 blinks a little faster to 1 Hz (steps 38, 3).
9). Similarly, buzzer 2 at 45 minutes and 52.5 minutes
2 sounds and the refueling lamp blinks faster (steps 39 to 44). When the timer 18 has passed 60 minutes, the kerosene in the tank 1 is also almost empty, so that the refueling lamp 21 is turned on (step 46) and the combustion is stopped by the combustion stopping means 19 (step 4).
7).

FIG. 4 is a time chart showing the above operation. The blinking cycle of the refueling lamp 21 is the timer 18
Since it changes with the lapse of time, it is possible to know about how many minutes it is possible to burn until the kerosene runs out by simply looking at the blinking state of the refueling lamp 21. Further, since the blinking becomes faster as the remaining combustion time becomes shorter, it is possible to increase the degree of recognition that the user needs to replenish kerosene with time.

Therefore, when the refueling lamp 21 lights up late at night or when the good morning timer is set, it is possible to instantly determine whether to refuel immediately or the next morning. Therefore, the timing of refueling can be freely selected according to the usage situation. It has the effect that it can be used and is easy to use. Further, since the refueling lamp 21 lights up more quickly as the remaining combustion time decreases, the user's recognition that "the kerosene must be replenished" increases as the combustion stop time approaches. Therefore, it is easy to use because it is less likely that the fuel will be forgotten and combustion will be stopped, and the odor will be generated or the heating temperature will be lowered. Further, since the above can be realized only by adding the refueling lamp control means 20, the cost does not increase.

Embodiment 2. In the first embodiment, the flashing frequency of the refueling lamp 21 is changed as the time of the timer 18 elapses.
It is also possible to calculate the cumulative amount of combustion after a is operated and change the blinking cycle of the refueling lamp 21 based on this result. FIG. 5 is a block diagram showing the control configuration of the combustion instrument according to the second embodiment of the present invention. In the figure, the calculating means 24 has a timer 18 incorporated therein, calculates the cumulative combustion amount after the float switch 2a is turned off in response to a command from the control part 17, and operates the refueling lamp control means 20 based on this cumulative value. It is a thing. All other parts are shown in Figure 2.
Is the same as

FIG. 6 is a flow chart showing a method of calculating the cumulative combustion amount by the calculating means 24. For example, when the combustion is weak (1000 kcal / h), the float switch 2
Assuming that it takes 60 minutes for kerosene to run out after a is turned off, 3 for medium combustion (2000 kcal / h)
0 minutes, 20 minutes for strong combustion (3000 kcal / h). Therefore, as shown in FIG. 6, the timer 18 counts by "1" per second when the combustion is weak, by "2" when the combustion is medium, and by "3" when the combustion is strong. . That is, if the count speed of the timer 18 is changed according to the combustion amount at that time, the value (relative value) of the cumulative combustion amount after the float switch 2a is operated can be easily calculated. In this case, when the value of the timer 18 becomes "3600", the combustion stopping means 19 may be operated.

As described above, since the blinking cycle of the refueling lamp 21 is changed according to the cumulative combustion amount after the float switch 2a is turned off, even if the combustion amount changes midway,
The amount of remaining kerosene can be accurately known, and the usability is improved. Further, since the buzzer 22 is sounded each time the blinking frequency of the refueling lamp 21 changes, it is possible to more clearly recognize the remaining combustion time or the amount of remaining kerosene at that timing, and therefore the combustion is performed without refueling. It is easy to use because it will not stop.

Furthermore, since the time interval at which the blinking frequency of the refueling lamp 21 changes is gradually shortened, the blinking cycle can be finely changed over a plurality of stages before the combustion stop where refueling is highly required. As a result, it is possible to obtain the effect of further improving usability.

[Brief description of drawings]

FIG. 1 is a structural diagram of a combustor of a general combustion appliance.

FIG. 2 is a block diagram showing a control configuration of the combustion instrument according to the first embodiment of the present invention.

FIG. 3 is a flowchart showing a control operation of a control unit according to the first embodiment of the present invention.

FIG. 4 is an operation time chart of the control unit according to the first embodiment of the present invention.

FIG. 5 is a block diagram showing a control configuration of a combustion instrument according to a second embodiment of the present invention.

FIG. 6 is a flowchart showing an operation of a calculation means according to the second embodiment of the present invention.

[Explanation of symbols]

1 tank, 2 remaining amount detector, 3 float, 18 timer, 19 combustion stopping means, 20 refueling lamp control means, 21 refueling lamp, 22 buzzer.

Claims (4)

[Claims] 1. A combustor for burning a liquid fuel, a tank for storing the liquid fuel fed to the combustor, a residual quantity detector for detecting a residual quantity level of the liquid fuel in the tank, and a residual quantity for the residual quantity. A timer for counting the combustion time by the combustor after the detection of a predetermined remaining amount level by the amount detector, a combustion stopping means that operates when the value of the timer reaches a predetermined value, and the remaining amount detector is A combustion appliance, comprising: a refueling lamp control unit that operates after a predetermined level is detected and that blinks a refueling lamp so that the frequency sequentially increases as the timer elapses. 2. A combustor for burning liquid fuel, a tank for storing the liquid fuel fed to the combustor, a residual quantity detector for detecting a residual quantity level of the liquid fuel in the tank, and a residual quantity for the residual quantity. The calculation means for calculating the cumulative combustion amount after the detection of the predetermined remaining amount level by the amount detector, the combustion stopping means for operating when the calculation means reaches a predetermined value, and the remaining amount detector for setting the predetermined remaining amount. A combustion instrument comprising a fueling lamp control means which operates after a quantity level is detected and blinks a fueling lamp so that the frequency is sequentially increased as the cumulative combustion amount is increased by the computing means. 3. The combustion instrument according to claim 1, wherein an alarm means such as a buzzer is activated each time the blinking frequency of the refueling lamp changes. 4. The time interval at which the blinking frequency of the refueling lamp changes is shortened as the time of the timer elapses or as the cumulative combustion amount of the computing means increases. Combustion appliances as described in.