KR910000901B1 - How to control calorific value of oil burner - Google Patents

Abstract

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Description

How to control calorific value of oil burner

1 is a schematic cross-sectional view showing the configuration of a general petroleum combustion.

2 is a control circuit diagram of a petroleum burner to which the calorific value control method of the present invention is applied.

3 is a detailed circuit diagram of FIG.

4 is a signal flow diagram showing a heating value control method of the present invention.

5a-d is a graph showing the operating characteristics of the petroleum combustor according to the calorific value control method of the present invention,

(a) is a graph of heating time versus temperature difference.

(b) is a graph of temperature difference versus calorific value.

(c) is a graph of burner motor rotation speed versus calorific value.

(d) is a graph of fan motor speed vs. calorific value.

* Explanation of symbols for main parts of the drawings

1: Burner main body 7: Burner motor

13: electronic pump 17: fan motor

The present invention relates to a method for controlling the calorific value of a petroleum combustor for appropriately heating a room by varying the calorific value according to the size of an indoor space to be heated in a petroleum combustor such as a petroleum fan heater for heating the room by burning petroleum.

In general, when heating the room using a petroleum burner, it is possible to heat the room in an optimal state only by using an petroleum burner having an appropriate calorific value according to the size of the indoor space to be heated.

However, the conventional petroleum combustors are configured to set the heating amount at the same time as the user sets the heating temperature, so the maximum calorific value generated by burning the oil is fixed at a constant value.

That is, by the user's initial selection, the size of the indoor space that can be heated for each oil burner is predetermined. Therefore, users have a problem in selecting and purchasing a petroleum burner having an appropriate heating value according to the size of the indoor space to be heated when purchasing the product.

In addition, since the calorific value of the petroleum combustion unit is fixed regardless of the size of the indoor space to be heated, when the calorific value is small compared to the size of the indoor space, there is a problem that it takes a long time to heat the room optimally. If large, the error in maintaining the set temperature is large, there was a problem that the precision falls.

Accordingly, it is an object of the present invention to provide a calorific value control method of a petroleum burner with improved precision when controlling room temperature. Another object of the present invention is to determine the calorific value according to the size of the indoor space to be heated based on the correlation function between time and temperature, and a calorific value control method for heating the room optimally in a short time with a single oil burner To provide.

That is, the size of the indoor space is detected at the initial time of heating the room by operating the petroleum burner, and the calorific value of the petroleum burner is controlled according to the detected size of the indoor space.

The calorific value control method of the present invention having the above object comprises the steps of igniting the burner at the initial time of heating the room, detecting the initial room temperature when the burner is ignited, and driving the petroleum burner to the maximum heat for a predetermined time, If the petroleum burner is operated at maximum heat for a certain time, detecting the current room temperature, subtracting the initial room temperature from the detected current room temperature to obtain the temperature difference, and determining the size of the indoor space to be heated according to the temperature difference. And determining the control amount of the electronic pump, burner motor and fan motor according to the determined indoor space size, and operating the oil burner while controlling the operation of the electronic pump, burner motor and fan motor according to the control amount. Done.

Hereinafter, the heating value control method of the present invention will be described in detail with reference to the accompanying drawings.

1 is a schematic cross-sectional view showing the configuration of a general petroleum combustion machine. Here, reference numeral 1 denotes a burner body, and a burner body 1 is provided with a combustion chamber 2 for burning oil, and a dummyster 3 for detecting the temperature of the burner body 1 is fixed.

Reference numeral 4 is a casing wrapped around the burner body 1. The igniter 5 is fixed to the casing 4 to ignite the oil dispersed in the combustion chamber 2. In addition, the frame rod 6 is fixed to the casing 4 to detect the ignition state with a flame.

Numeral 7 denotes a burner motor, and as the burner motor 7 is driven, combustion air is supplied to the combustion chamber 2 through the combustion air supply pipe 8 and the combustion air inlet 9, and the burner motor 7 At the rear, a photo interrupt 10 for detecting the rotational speed of the burner motor 7 is provided.

In addition, a nozzle 11 is installed at the central portion of the combustion air inlet 9, and the nozzle 11 is connected to the electromagnetic pump 13 through the fuel supply pipe 12. Petroleum supplied from the fuel storage tank 14 to the fuel supply tank 15 according to the operation of the electronic pump 13 is sequentially passed through the electronic pump 13, the fuel supply pipe 12, and the nozzle 11. Sprayed).

In addition, a fan 16 for discharging heat generated while petroleum is combusted in the combustion chamber 2 to the room is installed at the upper part of the burner body 1, and a fan motor 17 and a fan for turning the fan 16. The hall element 18 for detecting the rotational speed of the motor 17 is provided.

When heating the room by operating the petroleum combustor having such a configuration, a heater (not shown) first heats the burner main body 1, and the burner main body 1 ignites the flame with the dummyster 3. It detects whether it is heated to a temperature higher than that possible, and when heated above the ignition temperature, operates the igniter 5 to ignite.

In addition, the burner motor 7 is driven to supply combustion air to the combustion chamber 2, the electronic pump 13 is driven to inject petroleum into the combustion chamber 2, and then the fan motor 17 is driven to burn the combustion chamber ( In 2), heat generated by burning oil is discharged to the room.

The frame rod 6 detects whether the burner is ignited to control fuel supply, and the photointerrupter 10 operates according to the rotation of the burner motor 7 to detect the rotation speed of the burner motor 7, As the fan motor 17 rotates, the hall element 18 detects the rotation speed of the fan motor 17.

2 is a control circuit diagram of a petroleum combustor to which the calorific value control method of the present invention is applied, and FIG. 3 is a detailed circuit diagram thereof.

Here, reference numeral 20 denotes a microprocessor for controlling the overall operation of the oil combustor. Reference numeral 21 is a key signal input unit for inputting various operation command signals to the microprocessor 20, and reference numeral 22 is a buzzer for alarming an abnormal state or the like under the control of the microprocessor 20.

Reference numeral 23 denotes a power supply and a time interrupt and is connected to an input terminal of a secondary rectifier 24 of a transformer T to which an AC power source AC is applied to the primary side as shown in FIG. Outputs the operating power (B ₁ , B ₂ ).

)에 접속되어 있다.In addition, the interrupt terminal of the rectifier 24, a transistor output terminal (TR ₁₎ is connected to the base of a transistor (TR ₁₎ has a collector resistance (R ₁₎ and a microprocessor (20) of the (

)

When the AC power source AC is applied to the power supply and time interrupt unit 23 configured as described above, the AC power source AC is stepped down through the transformer T and input to the rectifier 24. The rectifier 24 rectifies the stepped down AC voltage, converts the voltage into a constant voltage, outputs the operating powers B ₁ and B ₂ , and outputs the rectified power to the base of the transistor TR ₁ to turn on and off the power. Will repeat.

As the transistor TR ₁ is turned on and off, a pulse signal corresponding to a power frequency is input to the microprocessor 20, and the microprocessor 20 is interrupted at a predetermined time interval by the pulse signal.

Reference numeral 25 is a temperature detector for detecting the room temperature and the burner body 1. In the detailed configuration, the connection point of the resistor R ₂ connected in series to the operating power source B ₁ and the indoor temperature detection dummyster 26 is the resistor R ₃ and the input terminal of the microprocessor 20 ( P ₁ ).

Also connected to the operation power a resistor connected in series (B ₁₎ (R ₄₎ and an input terminal (P ₂₎ of the connection point for detecting the burner temperature is Mr (3) resistance (R ₄₎ and a microprocessor (20) do.

In the temperature detector 25, the dummysters 26 and 3 have variable resistances according to the room temperature and the burner body 1, and the resistances of the dummysters 26 and 3 are variable. Accordingly, the magnitude of the voltage input to the input terminals P ₁ and P ₂ is variable.

Therefore, the microprocessor 20 detects the room temperature and the temperature of the burner body 1 by the magnitude of the voltage of the input terminals P ₁ and P ₂ . Numeral 27 denotes a burner motor speed detector that detects the rotational speed of the burner motor 7.

The burner motor speed detection unit 27 has a resistor R ₆ and a light emitting device PD ₁ of the photo interrupt 10 connected to the operating power supply B ₂ , and the light receiving device PT ₁ is connected to the resistor R _7. ) and the input terminal (P ₃₎ of the microprocessor 20 is connected to.

The burner motor speed detection unit 27 emits light of the light emitting device PD ₁ by the operating power source B ₂ , and the light of the light emitting device PD ₁ is rotated by the burner motor 7. ₁ ) the light receiving device PT ₁ is turned on and off, and the pulse signal is input to the input terminal P ₃ in response to the light receiving device PT ₁ being turned on and off. The rotation speed of the burner motor 7 is detected by counting the number of pulse signals.

Reference numeral 28 is a fan motor speed detector that detects the rotational speed of the fan motor 17. The fan motor speed detector 28 has an operating power source B ₂ applied to the hall element 18, and is connected to the base of the transistor TR ₂ through an output terminal resistor R ₈ of the hall element 18. The collector of transistor TR _{2 is} connected to resistor R ₉ and input terminal P ₄ of microprocessor 20.

The fan motor speed detector 28 configured as described above, when the fan motor 17 is rotated, the Hall element 18 detects a change in the magnetic field generated by the rotation of the fan motor 17 to detect a sinusoidal waveform detection signal. The pulse signal is inputted to the input terminal P ₄ while the transistor TR ₂ is repeatedly turned on and off in accordance with the detected signal, and the microprocessor 20 generates a fan by the number of pulse signals of the input terminal P ₄ . The rotational speed of the motor 17 is detected.

Reference numeral 29 denotes a heater and an igniter driver for heating and igniting the burner body 1. The heater and igniter driver 29 has a output terminal OT ₁ of the microprocessor 20 having a resistor (R ₁₀ , R ₁₁ ), a diode (D ₁ , D ₂ ), and a capacitor (C ₁ , C ₂ ). It is connected to the base of the transistor TR ₃ via the voltage rectifier 30, an operating power source B ₂ is applied to the collector of the transistor TR ₃ through the resistors R ₁₃ and R ₁₂ , and the resistor R _13, is the connection point of the R ₁₂₎ connected to the base of the transistor (TR ₄₎ and is connected to the emitter of the collector of the transistor (TR _5).

In addition, the collector of the transistor TR ₄ is connected to the collector of the transistor TR ₆ through a heater H and a diode D ₄ connected in parallel, and the base of the transistor TR ₅ is connected to the collector of the microprocessor 20. The output terminal OT ₂ is connected via the diode D ₃ and the resistor R ₁₄ , the collector of the transistor TR ₅ is connected to the igniter 5 and the diode D ₅ , and the transistor TR ₆ A connection point of a resistor R ₁₄ (R ₁₅ ) connected in series with the output terminal OT ₃ of the microprocessor 20 is connected to the base.

When the heater and the igniter driver 29 output the high potential to the output terminal OT ₁ by the microprocessor 20, the high potential signal is rectified by the double voltage rectifier 30 and the transistor TR _3. Transistor TR ₃ is turned on because it is applied to the base of the transistor, and as the transistor TR ₃ is turned on, the operating power source B ₂ is applied to the transistor TR ₁₃ through the resistors R ₁₃ and R ₁₂ . the low potential signal to the base of (TR ₄₎ is applied is turned on and the transistor (TR _4).

When the burner body 1 is heated in such a state, when the microprocessor 20 outputs a high potential to the output terminal OT ₃ , the transistor TR ₆ is turned on and the operating power source B ₂ is turned on. Since it is applied to the transistor TR ₄ , the heater H, and the transistor TR ₆ , the heater H is heated to heat the burner body 1.

Then, when the microprocessor 20 outputs a low potential to the output terminal (OT _2), is applied with the low potential to the base of the transistor (TR ₅₎ and the transistor (TR ₅₎ on, the operating power supply (B ₂ ) Is applied to the igniter 5 through the transistors TR ₄ (TR ₅ ) so that the igniter 5 operates to ignite.

Numerals 31, 32, and 33 denote microprocessors 20 in the burner motor drive control unit, the electronic pump drive control unit, and the fan motor drive control unit which control the drive of the burner motor 7, the electronic pump 13, and the fan motor 17, respectively. Output terminals OT ₄ -OT ₆ are connected to the light emitting elements PD ₂ -PD ₄ through the resistors R ₁₆ -R ₁₈ , respectively.

When the microprocessor 20 outputs a high potential to the output terminals OT _{2 to} OT ₄ , the driving controllers 31 to 33 turn on the light emitting elements PD _{2 to} PD ₄ , and the light emitting elements PD are turned on. _2- PD ₄ ) the light receiving element (not shown) senses and supplies AC power to the load side burner motor 7, the electronic pump 13 and the fan motor 17 is driven.

Reference numeral 34 denotes a display unit for displaying various operation operations of the petroleum combustion machine and inputted key signals, and the like. The output terminals B ₀ -B ₄ of the microprocessor 20 are connected to the indicator 36 through the driving unit 35. The indicator 36 is connected to the output terminals B ₅ , B ₆ of the microprocessor 20.

In the display unit 34, when the microprocessor 20 outputs a predetermined data signal, the driving unit 35 drives the display unit 36 according to the predetermined data signal, and various operating states and input keys of the oil combustor are provided. The traffic light will be displayed.

Reference numeral 37 denotes an ignition detector for detecting whether ignition has occurred, and an operating power source B ₂ is connected to a diode D ₆ and a capacitor C ₂ through a ground resistor R ₁₉ , a frame rod 6, and a resistor R ₂₀ . ) and the input terminal (P ₅₎ of the microprocessor 20 is connected to.

When the ignition detector 37 igniter 5 is driven and ignited, the frame rod 6 detects the salt caused by the flame and operates as a diode, so that the operating power source B ₂ is operated by the frame rod 6 and the resistor. Input to the input terminal (P ₅ ) through (R ₂₀ ) microprocessor 20 detects whether the ignition by the input signal of the input terminal (P ₅ ).

The calorific value control method of the petroleum combustor of the present invention having such a configuration can be represented by the signal flow diagram shown in FIG.

First, the microprocessor 20 initializes various RAMs and input / output ports inside the microprocessor 20 at step 101, and at step 102 PID calculation, that is, burner motor 7 and fan motor 17. The amount of power to be applied for power control, etc. is calculated, and in step 103, the length of the main routine is determined by detecting whether the execution time of the main routine is 4 msec, and the execution time of the signal flow chart of the present invention is determined.

Then, in step 104, the key signal input from the key signal input unit 21 is checked, and a response according to the key signal checked in step 105 is performed. Then, in step 106, the alarm according to the key selection, That is, the driving of the buzzer 22 is controlled, the display function is performed on the display unit 36 of the display unit 34 so as to be viewed by the user by performing the display function in the step 107, and in steps 108-112. The temperature of the burner body 1, the ignition detection and the room temperature are detected according to the matrix.

That is, when the matrix is 0 in step 108, the analog voltage detected by the temperature of the burner body 1 is converted to digital in step 110, and when the matrix is 1 in step 109, step 111. ), The frame load 6 detects the flame and converts the analog voltage input to the input terminal P ₅ to digital, and if the matrix is neither 0 or 1, the temperature for detecting the indoor temperature is increased in step 112. The analog voltage input to the input terminal P ₁ is digitally converted according to the detected room temperature by the MR 26 to detect the temperature, the ignition state and the room temperature of the burner body 1.

Then, if there is an error by checking the self-diagnosis function in step 113, the operation of the oil combustor is reset in step 114, and if there is no error through the output terminal OT ₁ in step 115 The burner body 1 is heated by the heater H by outputting a high potential signal, and the burner body 1 is heated enough to ignite the input voltage of the input terminal P ₂ in step 116. When it is determined that the ignition temperature is lower than the heating temperature, and if the heating temperature is higher than the ignition temperature, the igniter 5 is driven and ignited in step 117, and the potential input to the input terminal P ₅ is input in step 118. It will detect if ignition has occurred.

When the ignition is detected in step 118, the initial room temperature is detected and stored as the magnitude of the voltage input to the input terminal P ₁ in step 119, and in step 120, the indoor space to be heated is heated. If it is selected to detect the size to detect the size of the indoor space to be heated, the operation of the petroleum burner at the maximum calorific value in step 121, that is, burner motor (7), electronic pump (13) and fan motor (17) maximum It is driven at a speed to drive at the maximum amount of heat, and in step 122 it is determined whether a predetermined time has elapsed, and continues to operate the oil burner with the maximum amount of heat until a predetermined time has elapsed.

When a predetermined time elapses in such a state, the current indoor temperature is detected in step 123, and the initial indoor temperature stored at the current indoor temperature detected in step 124 is subtracted to obtain a temperature difference, that is, a temperature increase range. In step 125-129, the size of the indoor space to be heated is determined based on the temperature difference.

이하인지를 판별하여 X

이하일 경우에는 단계(127)에서 실내공간의 크기를 "X"로 판단하고, X

이하가 아닐 경우에는 단계(126)에서 온도차가 Y

이하인지를 판별하여 Y

이하일 경우에는 단계(128)에서 실내공간의 크기를 "Y"로 판단하며, 온도차가 Y

이상일 경우에는 단계(129)에서 실내공간의 크기를 "Z"로 판단한다.That is, in step 125 the temperature difference is X

Is X or less

If it is less than or equal to the size of the indoor space "X" in step 127, X

If not, the temperature difference in step 126 is Y

Is Y or less

If it is less than or equal to the size of the indoor space "Y" in step 128, the temperature difference is Y

In case of abnormality, the size of the indoor space is determined as “Z” in step 129.

Y

이며, 제5a도에 도시한 바와 같이 일정한 가열시간에 대해 기울기를 달리하여 그 온도차의 크기가 작아짐에 따라 난방할 실내공간의 크기는 Z

Y

X로 커지게 된다.Where the magnitude of the temperature difference is X

Y

As shown in FIG. 5A, as the slope is changed with respect to a constant heating time, the size of the temperature difference decreases and the size of the indoor space to be heated is Z.

Y

Will be increased to X.

In addition, as shown in FIG. 5B, the calorific value is set so that the calorific value is proportionally increased as the size of the indoor space to be heated for a constant temperature difference increases.

In addition, in the above, the heat difference according to the size of the indoor space to be heated is divided into three stages, but the heat generation amount according to the size of the indoor space to be heated is divided into three stages in the present invention. Can also be set.

When the size of the indoor space to be heated is determined in this way, according to the size of the indoor space to be heated, the control amount of the electronic pump 13 is determined in step 130, and the burner motor 7 of the burner motor 7 is determined in step 131. The control amount is determined, and in step 132 the control amount of the fan motor 17 is determined.

Here, the control amount of the burner motor 7 is set such that the rotation speed of the burner motor 7 increases proportionally as the size of the indoor space and the amount of heat are increased as shown in FIG. 5C. As shown in FIG. 5D, the control amount is set such that the rotation speed of the fan motor 17 increases as the size of the indoor space and the amount of heat generated increase.

Then, in step 133, the heater H of the burner related to the optimum combustion is controlled on and off, and in step 134, after determining the heating step according to the difference of the set temperature of the room temperature, step 102 As described in detail above, the present invention controls the calorific value of the petroleum burner according to the size of the indoor space to be heated, thereby heating the room, thereby obtaining a system with less error, and one petroleum oil. The combustor has the effect of heating the room optimally in a short time.

Claims (3)

In the petroleum combustor having a microprocessor 20 and heating the room, detecting the initial room temperature when the buzzer is ignited, detecting the current room temperature by heating the room with the maximum amount of heat for a predetermined time; Determining the size of the indoor space by subtracting the initial indoor temperature from the current indoor temperature, and determining the control amount of the electronic pump, burner motor, and fan motor according to the determined size of the indoor space. Method of controlling calorific value of petroleum combustion machine. The method of claim 1, wherein the detecting of the current indoor temperature determines whether to detect the size of the indoor space to be heated, and when the indoor size is detected, the burner motor, the electronic pump, and the fan motor are driven to the maximum, and whether a predetermined time has elapsed. The method is to control the calorific value of the petroleum burner, characterized in that to operate the petroleum burner at the maximum calorific value until a predetermined time elapses, and to detect the current room temperature after a predetermined time elapses. The method of claim 1, wherein the determining the indoor size comprises calculating the temperature difference by subtracting the initial indoor temperature from the current room temperature, and setting the temperature difference band in several steps to compare the calculated temperature difference with each temperature difference band. According to the size of the indoor space to be heated according to the calorific value control method of the oil combustor.

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