KR950000402B1 - Heater - Google Patents

Abstract

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Description

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1 is a flowchart showing the operation of the combustion amount control means of the first embodiment of the heater of the present invention.

2 is a flowchart showing the operation of the combustion amount control means of the second embodiment of the heater of the present invention.

3 is a block diagram of a combustion amount control means of a conventional heater.

4 is a block diagram of a conventional combustion means and its surroundings.

5 is a flowchart showing the operation of the combustion amount control means of the conventional heater.

* Explanation of symbols for main parts of the drawings

1: microcomputer 22: burner

26: Flame Detector

The present invention relates to a heater, and more particularly to the control of the amount of combustion.

In general, as a heater having a combustion function, a stove, a fan heater, and the like, which are fueled by oil and gas, may be cited. The prior art will be described using a petroleum fan heater.

3 is a block diagram of a microcomputer showing the combustion amount control means of a general petroleum fan heater and its surroundings, which includes a flame detector indicating the misfire detection means.

FIG. 4 is a block diagram showing a burner indicating a general combustion means and its surroundings, and FIG. 5 is a flowchart showing the conventional operation of the microcomputer and its surroundings.

In the figure, reference numeral 1 denotes a microcomputer for instructing various operations of the petroleum fan heater, and includes combustion amount control means for controlling the combustion amount of the combustion means shown in FIG. (2)-(6) are switching means composed of a relay or the like operated by the microcomputer (1), (7) a gas cylinder for heating and vaporizing kerosene of fuel, and (8) a gas cylinder (7). A preheating heater (9) is a vaporization temperature sensor for detecting the temperature of the vaporization tank (7), (10) a cartridge type fuel tank for storing kerosene, (11) kerosene from the fuel tank (10) A subtank temporarily stored therein, (12) is an oil level machine for storing kerosene sent out to the vaporization tank (7) through the fuel pipe (13), (14) kerosene from the subtank (11) An electromagnetic pump pumped up to the oil level machine 12, a vent pipe for introducing air from the outside to send the air to the vaporization cylinder (7), 16 is air to the oil level machine 12 A pressurized hose for feeding out and pressurizing the liquid surface, 17 is disposed in the pressurizing hose 15, and a valve for varying the amount of air to be sent to the oil refinery 12, 18 is a valve 17 A pressurized solenoid for performing the operation, 19 is a blower fan A for introducing air from the outside to send air to the blower tube 15 and the pressure hose 16, 20 is a blower motor for rotating the blower fan A (19), 21 is an air filter for removing dust and the like in the air introduced into the vent pipe 15 by the blowing fan A 19, 22 is a burner as a combustion means for burning vaporized kerosene, 23 Blower motor for rotating blower fan B (not shown) which introduces outside air above burner 22 to mix the air with the heat generated by the combustion to create warm air, 24 is burner 22 above. The ignition transformer for sparking and igniting the vaporized kerosene, 25 is a room temperature sensor for detecting the temperature of the room where the petroleum fan heater is placed, 26 is a flame detector as a fire detection means for detecting misfire, and the burner 22 And an electrode part is disposed on the burner 22, and between these electrodes. A voltage can be applied at all times, and during combustion, a current flows between the electrodes using a flame generated between these electrodes as a medium, and a current does not flow between the electrodes because there is no flame that is natural during a fire. The misfire state is detected by the presence or absence of a current flowing through the flame.

Next, the conventional operation in the microcomputer 1 will be described using the flowchart of FIG.

First, in step S ₁ of FIG. 5, the switching means 3 is operated to energize the heater 8 to preheat the vaporization cylinder 7. Then, when the group hwatong temperature sensor, by (9) detects the temperature of the exchanger hwatong 7 group hwatong 7 is a prescribed temperature or higher to evaporate the kerosene from the step S _2, the switching means in step S ₃ ( 4), the electronic pump 14 is operated to spread kerosene stored in the sub tank 11 from the fuel tank 10 to the oil level machine 12 to store in the oil level machine 12. Next, in step S ₄ , the switching means 2 is operated to energize the blower motor 20 to rotate the blowing fan A 19, and to blow air from which dust is removed by the air filter 21. I send it out in time.

Next, in step S ₅ , the switching means 6 is operated to energize the blowing motor 23 to rotate the blowing fan B to introduce air above the burner 22. At the same time performs a spark discharge to the top burners (22) by operating the switching means 5, in step S ₆ by supplying current to the ignition transformer 24, and power is supplied to the pressing solenoid 18 at step S _7, and the valve 17 It opens, ventilates the inside of the pressurizing hose 16, and applies pressure to the liquid level of kerosene of the oil refining machine 12. As a result, the kerosene is sent out through the fuel pipe 13 into the vaporization cylinder 7 in a high temperature state and vaporized, and at the same time, the kerosene is mixed with the air sent out through the blower tube 15 into the vaporization cylinder 7. It becomes gaseous and ignites on the burner 22 by the spark discharge mentioned above, and forms a flame.

When a flame is generated, the flow advances from step S ₈ to step S ₉ to mix the air from the blowing fan B with the heat generated by the flame to generate warm air. Thereafter, energization to the ignition transformer 24 is stopped to stop spark discharge. Further, when the fire has not occurred, it returns at step S ₈ to the step S _3. Next, if the desired room temperature is set, the room temperature is detected by the room temperature sensor 25 in step S ₁₀ , and the operation of the switching means 2 is controlled in accordance with this temperature difference compared with the set desired room temperature. The rotational speed of the blower motor 20 is changed, the amount of air and kerosene sent out in the vaporization cylinder 7 is adjusted, and the amount of combustion is controlled.

Here, in the case of being burned during combustion, the burned state is detected by the flame detector in step S ₁₁ , the flow proceeds to step S ₁₂ to stop the energization of the electromagnetic pump 14, and the blower motor in step S ₁₃ according to the following procedure. 20) stops feeding the electric current to the blower motor 23, the pressing solenoid 18 at step S ₁₅ in step S _14. Then, a predetermined time elapsed, and energizing the re electromagnetic pump 14. In step S _17, following the blower motor 20 counts the time elapsed in the step S _16, (step S _18), blower motor 23 (step S ₁₉ ), the ignition transformer 24 (step S ₂₀ ) and the pressurized solenoid 18 (step S ₂₁ ) are energized, and after the flame is formed in step S ₂₂ , the energization of the ignition transformer is stopped in step S ₂₃ . Next, the combustion quantity control is performed such that the set room temperature, like step S ₁₀ the temperature in the step S _24. After that, if misfire has occurred again, misfire detection is performed again in step S ₂₅ , and an abnormality is detected in step S ₂₆ , and an operation stop command is sent in step S ₂₇ to terminate combustion. All of the above series of operations are controlled by the microcomputer 1.

The conventional heater is configured as described above, and when the heating load is small, heating by the minimum combustion amount is performed by controlling the combustion amount, but in this case, it is easy to be misfired, for example, a temporary stall of the blower motor 20 ( I) or the ignition operation is performed again even after the momentary stop of fuel supply to the gas cylinder 7 due to the mixing of air in the fuel pipe 13 or the like, and the ignition operation is performed again. In the case of being in a stationary state, refirement occurs, and there is a problem that heating by the minimum combustion amount is not stable.

This invention is made | formed in order to solve the said subject, and when it is reignitioned in the case of the misfire at the time of heating by the minimum amount of combustion, it does not fail again, and it aims at obtaining the heater which aimed at stabilizing the heating by the minimum amount of combustion. do.

The heater according to the present invention includes a combustion means for generating heat to form a flame, a combustion amount control means for controlling the combustion amount of the combustion means, and a misfire state when a misfire occurs during combustion by the combustion means. When a misfire is detected by the misfire detection means while the misfire detection means is provided and the combustion means performs the minimum combustion by the fuel amount control means, the minimum combustion amount of the combustion means is reset to a value larger than the minimum combustion amount before the misfire. It is.

The heater in the present invention, when fired at the time of heating by the minimum combustion amount, resets the setting value of the minimum combustion amount to a value larger than that before firing, thereby preventing the refired after re-ignition and stabilizes the heating by the minimum combustion amount. .

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

First, a first embodiment of the heater of the present invention will be described.

1 is a flowchart showing the operation of the microcomputer 1 and its surroundings. The block diagram of the microcomputer 1 and its surroundings, and the burner and its surrounding configuration are described with reference to FIGS. 3 and 4, and thus description thereof is omitted.

In the block diagram of FIG. 3, the combustion amount control means in the microcomputer 1 of the present invention has a function of resetting the set value of the minimum combustion amount to a value larger than before the misfire when a misfire occurs during heating by the minimum combustion amount. .

Next, the operation of the first embodiment of the present invention will be described using FIG. 1, FIG. 3, and FIG. 4. FIG.

First, in FIG. 1, the ignition operation of steps S _1- S ₉ until the heater 8 is energized, the flame is formed, and the ignition transformer 24 is stopped is operated. The description is the same as or equivalent to, and description thereof is omitted.

Next, the combustion amount is controlled in step S ₁₀ , that is, the rotational speed of the blower motor 20 is varied to increase or decrease the kerosene flow rate to be sent to the vaporization cylinder 7, after which the room temperature is equal to the desired set temperature. When the heating load decreases, heating by the minimum combustion amount is performed. When the supply of kerosene to the vaporization cylinder 7 is momentarily stopped due to the temporary stall of the blower motor 20 or the mixing of air in the fuel pipe 13 at the minimum combustion in step S ₁₁ , the kerosene is originally Since the supply amount of is small and the supply stop state overlaps, it is misfired and the misfire state is detected by the flame detector. Then, in step S _28, it resets the set value of the minimum combustion quantity that is previously stored within the microcomputer (1) by the misfire detection to a value greater than misfire. Thereafter, similarly to the conventional example, in step S ₁₂ and step S ₂₃ , the energization to the portion around the burner 22 is once stopped, and after a predetermined time has passed, the electricity to the portion around the burner 22 is again supplied, and the flame is re-ignited. To form. And when heating again in step _S29 , the minimum supply amount of kerosene to the vaporization container 7 is increased based on the newly set minimum combustion amount in the microcomputer 1, and it is admissible to the momentary supply stop of kerosene. Minimal combustion with Here, when the even increase the minimum combustion quantity misfire is that it may be considered a misfire due to causes other than a kerosene feed rate and detecting a misfire at step S _25, it performs the above display at the step S _26, and stops the combustion operation at step S ₂₇ .

Here, the set value of the minimum combustion amount larger than the initial value stored in the microcomputer 1 is returned to the initial set value by unplugging the outlet of the petroleum fan heater and resetting the microcomputer 1 by repulsion or reset switch operation. Other operations, for example, are not cleared when the power switch is turned on or off.

In addition, in the first embodiment described above, if it has been misfired once during the minimum combustion, the set value of the minimum combustion amount is forcibly increased to a constant value than before the fire during the reignition, and it has been shown to prevent the misfire. If the resetting and reburning are carried out as the same minimum combustion amount is set without increasing the set amount of the combustion amount, and the fired state is repeated a predetermined number of times, the reburning and reburning are carried out as the minimum burning amount is set. In a case where the repetition is repeated, the set value of the minimum combustion amount may be increased. As a result, it is possible to prevent the resetting of the minimum combustion amount accompanying the unusual cause without reproducibility at the beginning of heating operation, for example, misfire by dust attached to the burner 22, and to prevent the consumption of kerosene more than the required amount. This embodiment will be referred to as a second embodiment, and the operation thereof will be described with reference to FIGS. 2, 3, and 4.

The method of claim 2, the description thereof is omitted because the step S ₁ -S ₂₆ in the conventional ignition for operation up to misfire fifth embodiment identical or equivalent parts to help in the. Next, counting a misfire recovered in step S _30, and even if the misfire until it reaches the predetermined number of minimum combustion quantity in the microcomputer (1) attempts an initial set value of stay and a complexing material returns to step S ₃ reburn. If the number of misfires reaches a predetermined number of times, the flow advances to step S _28, and the set value of the minimum combustion amount in the microcomputer 1 is reset to a value larger than that before the misfires. Thereafter, in step S ₁₇ to step S ₂₃ , reignition is performed in the same manner as in the conventional example, and heating is performed by a combustion amount larger than the initial set value at the time of minimum combustion in step S ₂₉ , to prevent misfire. Further, when the zoom may be the minimum misfire combustion quantity is similarly first help detect a misfire in the step S _25, and performs the above display at the step S _26, and stops the combustion operation in the step S _27.

In addition, in the first and second embodiments, the minimum combustion amount is increased only once in case of fire, but as the embodiment of FIG. 3, the set value of the minimum combustion amount is raised step by step, and the combustion is performed each time so as not to burn. The microcomputer 1 may store the set value at the point of time at which it has been set, and it is possible to set an accurate minimum combustion amount, to prevent unnecessary consumption of combustion, and to improve the use efficiency of fuel.

Further, in the first to third embodiments, the petroleum fan heater that burns kerosene and heats it is described, but may be another heater having a combustion means, for example, an petroleum stove, a gas stove, a gas fan heater, or the like. The same effects as in the first to third embodiments are obtained.

As described above, according to the present invention, in the case of the heater, when the heating occurs at the minimum combustion amount, the fuel supply is instantaneously stopped by the instantaneous fuel supply stop. Even when a stationary state occurs, because the fuel supply is allowed, misfire can be prevented, stable heating can be performed even when the heating load is small, and the heating function can be improved.

Claims (1)

Combustion means for forming a flame to generate heat, combustion amount control means for controlling the combustion amount of the combustion means, and misfire detection means for detecting this misfire state when misfire occurs during combustion by the combustion means, And, when the misfire is detected by the misfire detection means when the combustion means performs the minimum combustion by the combustion amount control means, the heater is characterized in that the minimum combustion amount of the combustion means is reset to a value greater than the minimum combustion amount before the misfire. .

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