KR100914970B1 - Apparatus for controlling changing a combustion type of boiler to another combustion type of boiler and method for the same - Google Patents

Abstract

The present invention relates to an apparatus and a method for controlling the switching between the combustion of the boiler changes the amount of control heat is transferred between the combustion, switching between combustion is not easily made, noise generated by unnecessary switching, electromagnetic valve, heat exchanger, etc. To prevent deterioration of durability.

Description

Apparatus for controlling changing a combustion type of boiler to another combustion type of boiler and method for the same}

The present invention relates to an apparatus and a method for controlling the switching between combustion of a boiler.

Normally, combustion of a boiler is of three types: small combustion, medium combustion, and large combustion, and as shown in FIG. 1, the burner 102 ignited by the ignition source 101 is performed. The small combustion uses the first electron valve 103 and three craters on the right side for combustion switching, the medium combustion uses the second electron valve 104 and the five left craters, and the large combustion uses the first and second electron valves 103 and 104. All eight craters are used.

The switching between these combustions is particularly made when the switching from small combustion to medium combustion is as shown in Fig. 2, when the current heat amount of the burner is raised to the maximum heat amount A in the small combustion calorific section, and the ignition source 101 ) Is one, and after a moment of large combustion,

However, due to such large combustion, the calorific value is instantaneously increased, and the problem is that unnecessary switching to small combustion can be made while lowering the increased calorific value.

The present invention was developed to solve such a problem, and an object of the present invention is to provide an apparatus and method for controlling a combustion switching of a boiler to prevent unnecessary switching as described above.

The combustion switching control device of the boiler of the present invention according to the above object

Key input unit for receiving a user-set temperature, a temperature sensor for detecting the temperature of the water flowing through the boiler pipe, the first, second conduction unit connected to the first and second electronic valve for the combustion switching of the burner, the user set temperature and temperature of the key input unit In the combustion control apparatus of a boiler comprising a microcomputer for controlling the ON-OFF combustion operation of the first and second energized parts by the current heat amount calculated by the temperature difference of the water of the sensor,

When the current calorie belongs to the calorie overlapping section, the microcomputer adds or subtracts a calorie set in advance to a specific calorie to determine whether or not to replace the combustion from the current calorie, and the maximum calories within the caloric section to which the current calorie belongs. And a control unit for controlling the ON-OFF combustion operation of the first and second energizing units according to the comparison result with the calorific value and the minimum calorific value.

The control unit is configured to turn on the first conducting unit and the second conducting unit is OFF when the current calorie belongs to the small combustion calorie section, the current calorie when the current calorie belongs to the small combustion calorie overlapping section In the case that the heat generated by subtracting the calories from the maximum amount of heat in the small combustion calorie section is characterized in that the built-in algorithm to turn the first conducting portion is OFF, the second conducting portion is ON.

The control unit is configured to turn off the first conducting unit and the second conducting unit when the current calorie belongs to the heavy combustion calorie section, and to present the current calorie when the calorie belongs to the small combusted heavy combustion calorie overlap section within the medium burn calorie section. When the calorie value obtained by adding the calorie value to the calorific value becomes a minimum calorific value within the medium combustion calorie section, an algorithm is provided in which the first conducting portion is turned on and the second conducting portion is turned off.

The control unit is configured to turn off the first conducting unit and the second conducting unit when the current calorie belongs to the heavy combustion calorie section, and the current calorie when the current calorie belongs to the heavy combustion large combustion calorie overlap section within the heavy combustor calorie section. In the case that the heat generated by subtracting the set calories in the maximum amount of heat in the calorific calorie section is characterized in that the built-in algorithm for turning on the first and second conduction unit.

The control unit turns on the first and second energizing units when the current heat quantity belongs to the large combustion calorie section, and adds the set heat value to the current heat quantity when the current heat quantity belongs to the heavy combustion large combustion calorie overlap section within the large combustion calorie section. When the amount of heat generated is the minimum amount of heat in the large combustion calorie section, the first conducting unit is turned off, and the second conducting unit is characterized in that an algorithm is incorporated.

The combustion switching control method of the boiler of the present invention according to the above object

Computing the current calorie of the burner by the difference between the user set temperature and the temperature of the water flowing through the pipe of the boiler, subtracting the set calorie to the current calorie if the calculated current calorie belongs to the small combustion medium combustion overlapping section in the small combustion calorie section When the amount of heat released is small combustion maximum calorie, characterized in that made, including the step of switching from small combustion to heavy combustion.

In addition, when the current calorie belongs to the small-combustion medium-heated calorie overlapping section in the medium-burning calorie section, the step of switching from medium-combustion to small-combustion when the calorie produced by adding the set calorie to the current calorie becomes the minimum calorie of calorie combustion. It is characterized by.

And, if the current calorie belongs to the heavy combustion large combustion calorie overlap section in the heavy combustion calorie section, the step of switching from heavy combustion to large combustion when the amount of heat generated by subtracting the set calories to the current calorie has become the maximum calorific value of heavy combustion It is characterized by.

In addition, if the current calorie in the large combustion calorie section within the heavy combustion large combustion calorie overlap section includes the step of switching from the large combustion to medium combustion when the heat generated by adding the set calorie to the current calorie has become the minimum calorie of large combustion Characterized in that made.

The present invention is not easy to switch between the combustion, there is an effect that can prevent the noise generated due to unnecessary switching and durability degradation of the electronic valve, relay, heat exchanger and the like.

1 is a view showing the internal structure of a conventional boiler

2 is a view showing a combustion calorie curve of a conventional boiler

Figure 3a is a view showing a combustion switching control device of the boiler of the present invention

3B is a view showing an example of the first and second energizing parts 303 and 304 of FIG. 3A.

Figure 4 is a view showing the combustion calorie curve of the boiler of the present invention

Figure 5a is a view showing a combustion switching control method between small combustion medium combustion of the present invention

5b is a view showing a combustion switching control method between large combustion large combustion of the present invention

Explanation of symbols on the main parts of the drawings

101: ignition source 102: burner

103: first electron side 104: second electron side

105: proportional side 106: fan

301: key input unit 302: temperature sensor

303: first conducting unit 304: second conducting unit

305: microcomputer 306: third conducting unit

307: fourth conducting unit 308: flame detection sensor

309: water level sensor 310: quantity sensor

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

The combustion switching control apparatus of FIG. 3A is an example of the combustion switching control apparatus according to the present invention, which includes a key input unit 301, a temperature sensor 302, first and second energizing units 303 and 304, and a microcomputer 305. .

And, in order to help the understanding of the present invention, the third conducting unit 306 for adjusting the amount of fuel gas supplied to the burner during combustion, the fourth conducting unit 307 connected to the fan 106 to adjust the amount of air ), The flame detection sensor 308, the water level detection sensor 309, the quantity detection sensor 310 to detect the flame generated by the ignition source is further configured.

The key input unit 301 receives a user set temperature according to a user's key operation.

The temperature sensor 302 is made of a negative temperature coefficient (NTC) thermistor, and informs the temperature of the water flowing through the boiler pipe by applying different voltages according to the temperature of the water flowing through the boiler pipe.

The first and second energizing parts 303 and 304 are connected one-to-one to the first and second electron sides 103 and 104 for the combustion switching of the burner, and selectively drive voltages to the first and second electron sides 103 and 104. Energize.

The microcomputer 305 adds or subtracts a set amount of heat from a current amount calculated by a difference between a user set temperature of the key input unit 301 and a temperature of water of the temperature sensor 302, and a calorie section to which the current amount of heat belongs. According to the result of comparison with the maximum heat quantity and the minimum heat value in the inside, the first and second energization parts 303 and 304 are turned on by a high pulse, and the first and the second energization parts 303 and 304 are turned off by a low pulse, Control the transfer operation.

The specific operation is as follows.

① Transfer operation from small combustion to medium combustion.

The control unit in the microcomputer 305 calculates the current heat amount of the burner calculated by the temperature difference between the user set temperature input from the key input unit 301 and the water flowing through the pipe of the boiler input from the temperature sensor 302. The calculation method is well-known and the description is abbreviate | omitted.

Next, when the calculated calories of the burner are calories in the small combustion calorie section, a high pulse (for example, 5 V) is transferred to the first conducting unit 303 and a low pulse (for example 0 V) is transferred to the second conducting unit 304. Is authorized. As a result, the fuel gas is supplied only to the three craters by the first electron valve 103 to start small combustion.

Subsequently, when the current heat amount of the burner is increased to become the heat amount in the small combustion heavy combustion heat overlapping section, the operation of subtracting the set heat amount from the current heat amount is started.

When the amount of heat subtracted becomes the maximum amount of heat in the small combustion calorie section, the heat is transferred to heavy combustion. That is, high firing is applied to the first and second energizing units 303 and 304 to ignite five fireballs, and low firing to the first conducting unit 303 to extinguish three fireballs and transfer them to medium combustion. .

② Transfer operation from medium to small combustion.

The control unit in the microcomputer 305 applies a low pulse to the first conducting unit 303 and a high pulse to the second conducting unit 304 when the calculated calories of the burner are within the medium combustion calorie section. When the burner's current calorie is lowered into the calorie overlap section of small combustion heavy combustion, the set calorie is added to the current calorific value, and when the added calorie becomes the minimum calorific value in the heavy combustion calorie section, the high pulse is removed. A low pulse is applied to the first conducting unit 303 to the second conducting unit 304, and is transferred to the small combustion.

③ Transfer operation from heavy combustion to large combustion.

The control unit in the microcomputer 305 applies a low pulse to the first conducting unit 303 and a high pulse to the second conducting unit 304 when the calculated calorie of the burner is within the medium combustion calorie section. After starting, if the current calorie of burner rises into the calorie overlap section of heavy combustion large combustion, the set amount of heat is subtracted from the current calorie, and if the amount of heat subtracted is the maximum calorie value in the heavy combustion region, a high pulse Is applied to the first and second energizing parts 303 and 304 to switch to large combustion.

④ Transfer operation from large combustion to medium combustion.

The control unit in the microcomputer 305 applies a high pulse to the first and second conducting units 303 and 304 when the calculated current calorie of the burner is within the large combustion calorie section to start large combustion. When the current heat is lowered into the heavy combustion large combustion heat overlap section, the set heat value is added to the current heat value, and when the added heat becomes the minimum heat in the large combustion heat section, a low pulse is sent to the first conducting unit 303. The high pulse is applied to the second conducting unit 304 to switch to heavy combustion.

The first and second conducting parts 303 and 304 of FIG. 3B are examples of the first and second conducting parts according to the present invention. The first and second conducting parts 303 and 304 may include a transistor, a phototriac, and the like. One-to-one connection to 104, selectively driving a driving voltage (for example, DC 100V) to a corresponding electronic side connected under the control of the microcomputer 305, so that the first and second electronic sides are turned on or off.

As shown in FIG. 4, in the related art, when the current calorie of the burner is the maximum calorie amount A in the small combustion calorie section or the maximum calorie calorie B in the medium burn calorie section, switching is performed. When the calorie value obtained by subtracting the set calorie value (α kcal) from the maximum calorie value (A) in the small combustion calorie section or the maximum calorie value (B) in the medium burn calorie section is changed.

In the related art, the changeover is performed when the current calorie of the burner becomes the minimum calorie (C) in the medium burn calorie section or the minimum calorie (D) in the large burner calorie section, while the present invention provides a set calorie value at the current calorie of the burner. The change is made when the calories obtained by adding (β kcal) become the minimum calories (C) in the medium combustion calorie section or the minimum calories (D) in the large combustion calorie section.

The calorific value between the small and medium combustion transfers (α, β) may be the same as or different from the calorific value between the medium and large combustion transfers (α, β) (α ', β').

Thus, as described above, in each case, switching between the combustion is not easy to prevent the occurrence of the "unnecessary switching" mentioned in the technical field of the present invention and the prior art of the field.

The inter-combustion switching of FIG. 5A relates to the combustion switching between small combustion medium combustion.

① Transfer from small combustion to medium combustion.

The current calorie of the burner calculated by the difference between the user set temperature inputted by the user key operation and the temperature of the water flowing in the boiler pipe belongs to the small combustion calorie section and is within the small combustion medium burn calorie overlap section (eg 200 to 300 kcal). When raised (S502 to S504), the set heat is subtracted from the current heat of the burner, and when the subtracted heat reaches the maximum heat amount (for example, 300 kcal) in the small burn calorie section, it is transferred from small to medium combustion ( S505 to S507).

② Transition from medium to small combustion.

When the calculated calorie of the burner belongs to the medium-burning calorie section and falls within the small-burning medium-burning calorie overlap section (for example, 200 to 300 kcal) (S502, S503, S511), the calorie set to the current calorie of the burner If the added calorie amount becomes the minimum calorie value (for example, 200 kcal) in the medium-burning calorie section, it is switched from medium to small combustion (S512 to S514).

The inter-combustion transfer of FIG. 5B relates to the combustion transfer between the large combustion large combustion.

① Transition from heavy combustion to large combustion.

The current calorie of the burner calculated by the difference between the user set temperature inputted by the user key operation and the temperature of the water flowing in the boiler pipe belongs to the medium-burning calorie section, and within the medium-burning large-burner calorie overlap section (eg 700 to 800 kcal). In the case of rising (S516, S517), the set heat is subtracted from the current heat of the burner, and when the subtracted heat reaches the maximum calorie value (for example, 800 kcal) in the medium burn calorie section, the medium heat is transferred to large combustion ( S518-S520).

② Transition from large combustion to medium combustion.

When the calculated calorie of the burner belongs to the large combustion calorie section and falls within the large combustion calorie overlapping section (for example, 700 to 800 kcal) (S516 and S522), the set calorie is added to the current calorie of the burner. If the added calories become the minimum calorie value (for example, 700 kcal) in the large combustion calorie section, transfer from large combustion to heavy combustion (S523 to S525).

Each of the combustion switching operations of FIGS. 5A and 5B is started when the corresponding switch is turned on according to a user key operation (S501), or when the temperature of the water flowing in the pipe of the boiler becomes the temperature set by the user (S508) or the user. If the set time has elapsed, it ends when the corresponding switch is off. When it is finished, the air supply fan motor and the fuel gas supply proportional valve are turned off (S509).

Claims (9)

A key input unit 301 for receiving a user set temperature; A temperature sensor 302 for detecting a temperature of water flowing in the boiler pipe; First and second energization parts 303 and 304 connected to the first and second electron sides 103 and 104 for combustion switching of the burner; A microcomputer that controls the ON-OFF combustion operation of the first and second energizing units 303 and 304 by the current heat amount calculated by the difference between the user set temperature of the key input unit 301 and the temperature of the water of the temperature sensor 302. In the combustion control device of the boiler comprising a (305), The microcomputer 305 is If the current calorie belongs to the calorie overlap section, the calorie obtained by adding or subtracting a predetermined caloric value preset to a specific calorie to determine whether or not combustion is transferred from the current calorie, and the maximum and minimum calories in the calorie section to which the current calorie belongs. And a control unit for controlling the ON-OFF combustion operation of the first and second energizing units (303, 304) according to the comparison result. The method of claim 1, The control unit When the current calorie is in the small combustion calorie section, the first conducting unit 303 is turned on and the second conducting unit 304 is turned off, and the current calorific value is in the small combustion medium burn calorie overlap section in the small burner calorie section. In the case of belonging to the current calorie subtracted from the set calorie calories when the maximum calorific value within the calcined calorie section, the first conducting unit 303 is OFF, the second conducting unit 304 is the step of turning ON Combustion switching control device of built-in boiler. The method of claim 1, The control unit When the current calorie belongs to the medium burn calorie section, the first conducting unit 303 is turned off, and the second conducting unit 304 is turned on, and the present calorific value is in the small combustion medium burn calorie overlap section in the medium burn calorie section. In the case of belonging to the current calorie added to the set calories, the calorific value within the calorie heating section is the minimum amount of heat in the first conducting unit 303 is ON, the second conducting unit 304 is the step of turning OFF Combustion switching control device of built-in boiler. The method of claim 1, The control unit When the current calorie belongs to the medium-burning calorie section, the first conducting unit 303 is turned off, and the second conducting unit 304 is turned on. In case of belonging, the heat transfer of the boiler with the built-in algorithm that turns on the first and second conducting units 303 and 304 when the heat generated by subtracting the set heat from the current heat becomes the maximum heat in the medium combustion calorie section. controller. The method of claim 1, The control unit The first and second energizing units 303 and 304 are turned on when the current calorie belongs to the large combustion calorie section, and is set to the current calorie when the current calorie belongs to the heavy combustion large combustion calorie overlapping section in the large burn calorific section. When the amount of heat generated by adding the amount of heat becomes the minimum amount of heat in the large combustion calorie section, the combustion switching of the boiler with the built-in algorithm is performed so that the first conducting portion 303 is turned off and the second conducting portion 304 is turned on. controller. Calculating a current amount of heat of the burner based on a difference between a user set temperature and a temperature of water flowing in a boiler pipe; And When the calculated current calories belong to the small combustion medium burn calorie overlap section within the small burn calorific section, the maximum calorific value of the calorie burned by subtracting a predetermined calorie value preset to a specific calorific value in order to determine whether or not to switch the combustion to the current calorific value The method of controlling the combustion transfer of the boiler comprising the step of switching from small combustion to medium combustion if there is. The method of claim 6, In the case where the calculated current amount of heat belongs to the small combustion medium burn calorie overlap section in the medium burn calorific section, the step of switching from the medium combustion to the small burn if the calorie value obtained by adding the set heat amount to the current calorie becomes the minimum calorie burn rate. Method of controlling the combustion transfer of the boiler made up. The method of claim 6, In the case where the calculated current calorie belongs to the heavy combustion large combustion calorie overlap section in the heavy combustion calorific section, a step of switching from heavy combustion to large combustion when the calorie obtained by subtracting the set calorie value from the current calorie becomes the maximum calorific value of heavy combustion. Method of controlling the combustion transfer of the boiler made up. The method of claim 6, If the calculated current calories belong to the heavy combustion large combustion calorie overlap section within the large combustion calorie section includes the step of switching from large combustion to heavy combustion when the calorie obtained by adding the set calories to the current calorie becomes the minimum calorific value of large combustion Method of controlling the combustion switching of the boiler made by.