KR101769838B1 - Circulation pump flow control method for preventing overheating of the boiler - Google Patents
Circulation pump flow control method for preventing overheating of the boiler Download PDFInfo
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- KR101769838B1 KR101769838B1 KR1020150129661A KR20150129661A KR101769838B1 KR 101769838 B1 KR101769838 B1 KR 101769838B1 KR 1020150129661 A KR1020150129661 A KR 1020150129661A KR 20150129661 A KR20150129661 A KR 20150129661A KR 101769838 B1 KR101769838 B1 KR 101769838B1
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- temperature
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/20—Arrangement or mounting of control or safety devices
- F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D19/00—Details
- F24D19/10—Arrangement or mounting of control or safety devices
- F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D19/00—Details
- F24D19/10—Arrangement or mounting of control or safety devices
- F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
- F24D19/1009—Arrangement or mounting of control or safety devices for water heating systems for central heating
- F24D19/1012—Arrangement or mounting of control or safety devices for water heating systems for central heating by regulating the speed of a pump
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D2220/00—Components of central heating installations excluding heat sources
- F24D2220/04—Sensors
- F24D2220/042—Temperature sensors
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Steam Or Hot-Water Central Heating Systems (AREA)
Abstract
The present invention relates to a circulating pump flow control method for preventing overheating of a boiler, and more particularly, to a circulating pump flow control method for starting a circulating pump operation in a control device when heating power is turned on; Followed by proportional control of the gas feed rate and initiating a heating combustion operation; Thereafter, the target circulation flow rate W1 determined with respect to the presently used gas amount Q supplied to the burner under proportional control between the maximum and minimum gas amounts Qmax and Qmin and the maximum and minimum target circulation flow rates Wmax and Wmin is calculated and stored ; Determining whether the current hot water temperature Tout is higher than the heating set temperature Tset set by the user; The target circulation flow rate W1, the digestion temperature drainage Y, the heating hot water supply temperature Tout, and the target hot water supply temperature Tout, when the current hot water tapping temperature Tout is higher than the heating set temperature Tset set by the user, The target value of the overheat preventing target circulation flow rate W2 = {the maximum target circulation flow rate Wmax-the target circulation flow rate W1} / {the extinguishing temperature multiples (Y) -1} x {the heating setting temperature Tset) (Tout) / heating set temperature (Tset) - 1} + target circulating flow rate (W1)); Performing a flow control operation of the circulation pump so as to have an output corresponding to the overheat preventing target circulation flow rate (W2); And performing a flow rate control operation of the circulation pump so as to have an output corresponding to the target circulation flow rate W1 when the current hot water temperature Tout is equal to or lower than the heating set temperature Tset.
Therefore, the premature fire extinguishing can be prevented, the operating time of the heating can be increased, boiling and overheating can be prevented, and the product can be safely protected.
Description
The present invention relates to a circulating pump flow control method for preventing overheating of a boiler, and more particularly, to a circulating pump flow control method for controlling a flow rate of a circulating pump, , It is possible to increase the heating operation time by preventing the premature digestion by delaying the rise of the hot water temperature by increasing the heating circulation flow rate and to protect the product by preventing boiling and overheating The present invention relates to a circulating pump flow control method for preventing overheating of a boiler.
Generally, a boiler is used to heat water by using combustion heat and heat generated by burning it using fuel, coal or gas as fuel, or supplying electricity to a heater, and supplying hot water to various heating facilities In the case of a domestic boiler, hot water is supplied to the piping installed on the floor of the room or the like, and is used for supplying hot water through a water pipe or the like.
When the heating mode is operated in the normal heating / hot water boiler, the circulation pump is operated to transfer the heating water, and the heating water is heated by the main heat exchanger and transferred to the heating load (i.e., heating pipe) Heating is done.
In addition, the supply of the hot water blocks the path from the three sides to the heating load side and opens the path to the hot water (hot water) heat exchanger so that the hot water heated in the main heat exchanger is transferred to the hot water (Hot water) heat exchanger, heat can be exchanged between the direct water and the heating water, and hot water can be supplied to the user.
The boiler having such a construction is installed with the capacity of the boiler being determined according to the appropriate level of the place where the heating is required. That is, if there are several rooms requiring heating, the capacity of the boiler is determined so that the heating can be supplied based on the entire room.
When the load is reduced due to saturation of the heating temperature during the control of the flow rate of the boiler, the temperature of the boiler rises even if the gas amount of the boiler is minimized.
There is no problem when the heating is completed sufficiently, but there is a problem of poor heating which prematurely extinguishes due to a rise in the temperature of the boiler due to the load variation when the heating load is small or when the heating system is used in conjunction with various systems, There is also the problem of overheating the boiler when operating at a high set temperature with low circulating flow rate.
That is, in the conventional boiler, the flow rate of the circulating pump is determined by determining the circulating flow rate according to the amount of gas, or the flow rate of the circulating pump is determined by determining the circulating flow rate based on the difference between the heating tapping temperature and the heat- And the circulation flow rate is small in controlling the flow rate of the pump for energy saving, there is a problem that boiling temperature reaching time is short and boiling or overheating frequently occurs at a high set temperature.
SUMMARY OF THE INVENTION The present invention has been made in order to solve the above problems of the related art and it is an object of the present invention to provide a heating control system for a heating boiler, The target circulation flow rate W1 or the overheat preventing target circulation flow rate W2 is calculated in accordance with the result of comparison between the temperature Tout and the set temperature Tset of the heating, The output of the circulating pump is controlled to be maximized for a predetermined operation time T after the heating fire extinguishing temperature Tset is larger than the extinguishing temperature Tset Y It is possible to prevent the premature fire extinguishment by operating safely and stop the fire, so that the operation time of the heating can be increased, and boiling and overheating can be prevented, To provide a loop flow control method it is an object.
According to another aspect of the present invention, there is provided a method of controlling a circulation pump, the method comprising: starting a circulation pump in a control device when heating power is turned on; Followed by proportional control of the gas feed rate and initiating a heating combustion operation; Thereafter, the target circulation flow rate W1 determined with respect to the presently used gas amount Q supplied to the burner under proportional control between the maximum and minimum gas amounts Qmax and Qmin and the maximum and minimum target circulation flow rates Wmax and Wmin is calculated and stored ; Determining whether the current hot water temperature Tout is higher than the heating set temperature Tset set by the user; The target circulation flow rate W1, the extinguishing temperature multiples Y, the heating hot water supply temperature Tout and the heating set temperature Tout are set to be higher than the maximum target circulation flow rate Wmax, Tset) to the predetermined formula to calculate and store the target superheat circulation flow rate W2; Performing a flow control operation of the circulation pump so as to have an output corresponding to the overheat preventing target circulation flow rate (W2); And performing a flow rate control operation of the circulation pump so as to have an output corresponding to the target circulation flow rate W1 when the current hot water temperature Tout is equal to or lower than the heating set temperature Tset.
At this time, the formula for calculating the overheat preventing target circulation flow rate W2 is calculated as {the maximum target circulation flow rate Wmax - the target circulation flow rate W1} / {the digestion temperature multiples Y - 1} ) / Heating set temperature (Tset) - 1} + target circulation flow rate (W1).
The digestion temperature drainage (Y) is set to an integer of 1.05 to 1.15.
On the other hand, in the control device 1 in which the flow rate control operation of the circulation pump is performed in correspondence with the overheat prevention target circulation flow rate W2 or the target circulation flow rate W1, the present heating hot water temperature Tout is set to a predetermined extinguishing temperature (Tset x Y); If the present hot water temperature Tout is lower than or equal to the extinguishing temperature Tset x Y, the process returns to the step of calculating and storing the target circulating flow rate W1 determined with respect to the current used gas amount Q. If the heating circulation flow rate W1 is high, The method comprising the steps of:
In addition, in the control device during the heating and extinguishing, the circulation pump is operated at the maximum number of revolutions until the predetermined operation time T is completed; And stopping the operation of the circulation pump and terminating the operation when the operation time T is finished.
The predetermined operating time T is a time required for discharging the heated water heated in the heat exchanger to the heating pipe side through the circulating pump in operation at the maximum number of revolutions in order to prevent boiling and overheating of the heat exchanger, 30 sec. ≪ / RTI >
As described above, according to the circulating pump flow rate control method for preventing overheating of the boiler according to the present invention, when the heating tapping temperature Tout of the boiler is greater than the heating set temperature Tset, the overheat preventing target circulating flow rate W2 And calculates the target circulation flow rate W1 or the overheat prevention target circulation flow rate W2 in accordance with the comparison result of the heating tapping temperature Tout and the heating set temperature Tset, And the output of the circulation pump is controlled so that the heating water temperature Tout becomes larger than the extinguishing temperature Tset x Y so that the output of the circulating pump is equal to the predetermined operation time T), it can prevent premature fire-extinguishing by stopping the operation safely. Therefore, it is possible to increase the operation time of the heating, prevent the boiling and overheating, and protect the product safely. Very useful inventions such that the reliability of the product itself and overheating protection of the boiler through the flow control of the pump can dramatically improve the marketability and the like.
1 is a schematic block diagram of a boiler to which the method of the present invention is applied;
FIG. 2 is a proportional control graph showing the correlation between the target circulation flow rate W1 and the gas consumption amount Q in the present invention. FIG.
3 is a flow chart for explaining the method of the present invention.
Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.
In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.
FIG. 1 shows a schematic block diagram of a boiler to which the method of the present invention is applied. FIG. 2 shows a proportional control graph showing a correlation in calculating the target circulation flow rate W 1 with respect to the gas consumption amount Q in the present invention. And FIG. 3 shows a flowchart for explaining the method of the present invention.
According to the present invention,
When the heating power of the boiler is turned on (S1), the control device 1 having the
Subsequently, the controller 1 calculates the maximum and minimum gas quantities Qmax and Qmin and the maximum and minimum target circulation flow rates Wmax and Wmin determined corresponding to the capacity of each boiler through the
(S5) judging whether or not the current heating hot water temperature Tout is higher than the heating set temperature Tset set by the user through the
The target circulation flow rate W1, the extinguishing temperature multiples Y, the heating hot water supply temperature Tout and the heating set temperature Tout are set to be higher than the maximum target circulation flow rate Wmax, (S6) of calculating and storing the overheat-preventing target circulating flow rate (W2) by comparing the calculated overheated target circulation flow rate (Tset) with the predetermined equation;
(S7) of performing a flow rate control operation of the circulation pump (4) so as to have an output corresponding to the overheat preventing target circulation flow rate (W2) calculated in the above-described manner;
(S8) of performing a flow rate control operation of the circulation pump (4) so as to have an output corresponding to the target circulation flow rate (W1) if the current hot water temperature Tout is equal to or lower than the heating set temperature Tset .
At this time, the formula for calculating the overheat preventing target circulation flow rate W2 is:
{Target circulation flow rate (Wmax) - target circulation flow rate (W1)} / {fire extinguishing temperature multiplier (Y) - 1} × {heating hot water temperature (Tout) / heating set temperature (Tset) - 1} + target circulation flow rate W1).
The digestion temperature drainage (Y) is set to an integer of 1.05 to 1.15.
On the other hand, in the control device 1 in which the flow rate control operation of the
(S9) judging whether or not the current hot water temperature Tout is higher than a predetermined extinguishing temperature (Tset x Y);
If the present heating water tapping temperature Tout is equal to or lower than the digesting temperature Tset x Y, the process returns to step S4 in which the target circulating flow rate W1 determined and stored with respect to the current used gas amount Q is calculated and stored, (S10) of extinguishing the burning of the burner when the temperature Tout is higher than the extinguishing temperature (Tset x Y).
During the heating and exhausting (S10), the controller 1 operates the
Stopping the operation of the circulation pump 4 (S13) and ending the operation when the operation time T is finished.
At this time, the predetermined operating time (T) is set such that the heating water heated in the heat exchanger is discharged to the heating pipe side through the circulation pump (4) during operation (S11) at the maximum number of revolutions to prevent boiling and overheating of the heat exchanger And is set to 10 to 30 seconds.
The operation and effect of the circulation pump flow control method for preventing overheating of the boiler according to the present invention will be described as follows.
First, the boiler control device 1 to which the present invention is applied is provided with a
Then, in the control device 1, the
after. 2, the control device 1 determines whether any of the slope values between the maximum and minimum gas quantities Qmax and Qmin determined in accordance with the capacity of each boiler and the maximum and minimum target circulation flow rates Wmax and Wmin The target recirculation flow rate W1 determined with respect to the current amount Q of the used gas supplied to the burner in proportional control through the
The relationship between the maximum and minimum gas quantities Qmax and Qmin for calculating the target circulation flow W1 and the maximum and minimum target circulation flow rates Wmax and Wmin is set in accordance with the capability of the boiler and the system configuration, .
The control device 1 determines whether the current hot water temperature Tout detected by the hot water
As a result of comparison between the heating set temperature Tset and the current heating hot water temperature Tout, if the current hot water temperature Tout is higher than the heating set temperature Tset, the maximum target circulation flow rate Wmax and the target circulating flow rate W1), the extinguishing temperature drainage (Y), the heating hot water supply temperature (Tout) and the heating set temperature (Tset) against the predetermined formula to calculate the overheat preventing target circulation flow rate W2 and store the calculated value in the
At this time, the overheat preventing target circulation flow rate W2 = {the maximum target circulation flow rate Wmax-the target circulation flow rate W1} / {the extinguishing temperature multiples Y-1} x the heating hot water temperature Tout / (Tset) - 1} + target circulation flow rate (W1), where the digestion temperature multiples Y are set to integers between 1.05 and 1.15.
That is, the target recirculation flow rate Wmax corresponding to the present proportional control heat quantity is obtained through the minimum target recirculation flow rate Wmin corresponding to the maximum gas recirculation flow rate Wmax and the minimum gas recirculation flow rate Wmin corresponding to the maximum gas amount Qmax determined according to the heat quantity of the boiler, (Wmax - Wmin) / (Qmax - Qmin)] * present proportional control heat quantity} at this time.
The maximum target circulation flow rate Wmax determined according to the amount of heat of the boiler or the like, the heating set temperature Tset set by the user, the heating hot water temperature Tout detected through the temperature sensor, and the hot water temperature are not overheated, W2 can be calculated by the above equation when the extinguishing temperature multiples (Y) for adjusting the temperature are inputted.
Therefore, it is possible to derive the target overheating prevention circulating flow amount corresponding to the heating set temperature while maintaining the current heat amount within the range where the overheating does not occur.
Here, an example of calculating the present target circulation flow rate W1 and the overheat preventing target circulation flow rate W2 will be described with reference to FIG.
2, when the present proportional control heat quantity is 20,000 kPa / h when Qmax is 30,000 kPa / h, Qmin is 5,000 kPa / h, Wmax is 18 l / min and Wmin is 8 liters / Is 14 liters / minute.
If the set temperature Tset is lower than or equal to the preset temperature Tset in the case where the set temperature Tset is 60 deg. C, the circulating pump flow rate control is performed at 14 liters / min, which is the target circulating flow rate W1 .
However, since the set temperature (Tset) is higher than the set temperature (Tset) of 60 DEG C when the heating tap water temperature Tout is 63 DEG C, the target overheating prevention circulation flow rate W2 is calculated as follows, assuming the extinguishing temperature multiples Y to be 1.1 .
The target circulation flow rate W2 of the overheat preventing target is {18 liters (Wmax) - 14 liters (W1)} / {1.1 (Y) - 1)} 63 (Tout) / 60 (Tset) W1) = 16 (W2)
The circulation pump flow rate control is performed so that the overheat preventing target circulation flow rate W2 is 16 liters / minute so that the heating hot water tapping temperature Tout becomes 63 占 폚 when the set temperature Tset is 60 占 폚.
In the control device 1 that has calculated the target overheating prevention circulation flow rate W2 through the above equation, the flow rate control of the
If the current heating tap water temperature Tout is lower than or equal to the heating preset temperature Tset as a result of a comparison between the heating set temperature Tset and the current heating hot water temperature Tout in the control device 1, The flow rate control operation of the
On the other hand, in the control device 1 while performing the flow control operation of the
As a result of the determination, if the present heating hot water temperature Tout is lower than or equal to the extinguishing temperature Tset x Y, the flow returns to the step S4 of calculating and storing the target circulating flow amount W1 determined with respect to the current used gas amount Q Repeats the subsequent steps.
However, when the control device 1 compares the extinguishing temperature (Tset x Y) and the current heating hot water temperature (Tout) with each other and the current heating hot water temperature Tout is higher than the extinguishing temperature (Tset x Y) The combustion is extinguished (S10) to prevent overheating.
Thereafter, in the control device 1, the
At this time, the predetermined operating time (T) is set such that the heating water heated in the heat exchanger is discharged to the heating pipe side through the circulation pump (4) during operation (S11) at the maximum number of revolutions to prevent boiling and overheating of the heat exchanger The test time was set to 10 to 30 seconds.
Although the preferred embodiments of the present invention have been described for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims. Which will be apparent to those skilled in the art.
1: control
1b:
2: Hot water temperature detecting device
3: Water temperature detection device
4:
5:
6:
7: Flame detector
8: Display device
9: a blowing
10: Adjustment device
Claims (7)
Followed by proportional control of the gas feed rate and initiating a heating combustion operation;
Thereafter, the target circulation flow rate W1 determined with respect to the presently used gas amount Q supplied to the burner under proportional control between the maximum and minimum gas amounts Qmax and Qmin and the maximum and minimum target circulation flow rates Wmax and Wmin is calculated and stored ;
Determining whether the current hot water temperature Tout is higher than a heating set temperature Tset;
The target circulation flow rate W1, the extinguishing temperature multiples Y, the heating hot water supply temperature Tout and the heating set temperature Tout are set to be higher than the maximum target circulation flow rate Wmax, Tset) to the predetermined formula to calculate and store the target superheat circulation flow rate W2;
Performing a flow rate control operation of the circulation pump so as to have an output corresponding to the overheat preventing target circulation flow rate W2,
The overheat preventing target circulation flow rate (W2)
{Target circulation flow rate (Wmax) - target circulation flow rate (W1)} / {fire extinguishing temperature multiplier (Y) - 1} × {heating hot water temperature (Tout) / heating set temperature (Tset) - 1} + target circulation flow rate W1), wherein the circulation pump flow rate control method for preventing overheating of the boiler.
The digestion temperature drainage (Y)
Wherein the circulation pump is set to an integer of 1.05 to 1.15.
If it is determined that the current heating hot water temperature Tout is higher than the heating set temperature Tset and the current heating hot water temperature Tout is lower than or equal to the heating set temperature Tset,
And performing a flow control operation of the circulation pump so as to have an output corresponding to the target circulation flow rate (W1).
In the control device in which the flow rate control operation of the circulation pump is performed in correspondence with the overheat prevention target circulation flow rate (W2) or the target circulation flow rate (W1)
Determining whether the current hot water temperature Tout is higher than a predetermined extinguishing temperature (Tset x Y);
If the current heating hot water temperature Tout is lower than or equal to the digesting temperature Tset x Y, the process returns to the step of calculating and storing the target circulating flow rate W1 determined with respect to the current used gas amount Q, And heating the burner to a higher temperature than the extinguishing temperature (Tset x Y).
In the control device after the heating and extinguishing,
Operating the circulation pump at the maximum number of revolutions until the predetermined operating time T is terminated;
And stopping the operation of the circulation pump and terminating the operation when the operation time T is terminated.
The predetermined operating time (T)
Wherein the flow rate of the circulating pump is set to 10 to 30 seconds.
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| Application Number | Priority Date | Filing Date | Title |
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| KR1020150129661A KR101769838B1 (en) | 2015-09-14 | 2015-09-14 | Circulation pump flow control method for preventing overheating of the boiler |
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| Application Number | Priority Date | Filing Date | Title |
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| KR1020150129661A KR101769838B1 (en) | 2015-09-14 | 2015-09-14 | Circulation pump flow control method for preventing overheating of the boiler |
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| KR20170032519A KR20170032519A (en) | 2017-03-23 |
| KR101769838B1 true KR101769838B1 (en) | 2017-08-22 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3413948B2 (en) * | 1994-04-28 | 2003-06-09 | 株式会社ノーリツ | Water heater |
| JP2008116148A (en) * | 2006-11-06 | 2008-05-22 | Rinnai Corp | Water heater |
| JP2014047927A (en) * | 2012-08-29 | 2014-03-17 | Rinnai Corp | Hot water circulation device |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100279885B1 (en) | 1998-12-23 | 2001-02-01 | 김우련 | Circulating Pump Control Method of Gas Boiler According to Circulating Flow Rate and Flow Rate |
| KR100294415B1 (en) | 1998-12-23 | 2001-09-17 | 김우련 | Pump control method according to system condition of gas boiler |
| KR100974168B1 (en) | 2008-03-28 | 2010-08-04 | 린나이코리아 주식회사 | Flow control method for circular pump in boiler |
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2015
- 2015-09-14 KR KR1020150129661A patent/KR101769838B1/en active IP Right Grant
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3413948B2 (en) * | 1994-04-28 | 2003-06-09 | 株式会社ノーリツ | Water heater |
| JP2008116148A (en) * | 2006-11-06 | 2008-05-22 | Rinnai Corp | Water heater |
| JP2014047927A (en) * | 2012-08-29 | 2014-03-17 | Rinnai Corp | Hot water circulation device |
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| KR20170032519A (en) | 2017-03-23 |
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