KR20140128591A - Method for judging total freeze and preventing freeze of boiler when turning on power supply - Google Patents

Method for judging total freeze and preventing freeze of boiler when turning on power supply Download PDF

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Publication number
KR20140128591A
KR20140128591A KR20130047179A KR20130047179A KR20140128591A KR 20140128591 A KR20140128591 A KR 20140128591A KR 20130047179 A KR20130047179 A KR 20130047179A KR 20130047179 A KR20130047179 A KR 20130047179A KR 20140128591 A KR20140128591 A KR 20140128591A
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KR
South Korea
Prior art keywords
temperature
boiler
water
water level
freezing
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Application number
KR20130047179A
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Korean (ko)
Inventor
노홍일
문창현
원치호
정영환
Original Assignee
린나이코리아 주식회사
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Priority to KR20130047179A priority Critical patent/KR20140128591A/en
Publication of KR20140128591A publication Critical patent/KR20140128591A/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N1/00—Regulating fuel supply
    • F23N1/08—Regulating fuel supply conjointly with another medium, e.g. boiler water
    • F23N1/085—Regulating fuel supply conjointly with another medium, e.g. boiler water using electrical or electromechanical means
    • 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
    • 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
    • F24H9/2035—Arrangement or mounting of control or safety devices for water heaters using fluid fuel
    • 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
    • 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
    • F24D2220/048—Level sensors, e.g. water level sensors

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Steam Or Hot-Water Central Heating Systems (AREA)

Abstract

The present invention relates to a method for completely freezing a boiler during initial power supply, and more particularly, to a method for determining whether a float switch installed in a water tank and a low-level electrode- ; If the float switch is in the " on "state or the low-level electrode type water level is not" on ", the control unit recognizes water in the water tank as frozen and finishes the complete freezing determination do.
Therefore, regardless of the degree of contamination in the water tank, the water level in the boiler is frozen, and the water level electrode detects the water level of the partially dissolved water, thereby preventing burning of the heat exchanger and fire And the life of the circulating pump can be shortened or burnout and failure can be prevented in advance.

Description

[0001] 1. Field of the Invention [0002] The present invention relates to a boiler,

More particularly, when a power supply voltage is first supplied to a boiler of a winter boiler, a float switch and a low-level electrode type water level meter installed in a water tank in a control unit are turned on Quot; state, the float switch is in the " on "state or the water level in the water tank is in the freezing state if the low-level electrode type water level meter is not" on " .

Generally, a boiler is installed to supply heating and hot water. It uses heat generated by burning various fuels to heat water, directly use heated water, or to heat the home or various buildings. , It is widely developed and used from small boiler used for household use to large boiler used for industrial use according to its size, and it is divided into oil boiler and gas boiler according to the fuel used, and various kinds of boilers are developed and used ought.

On the other hand, in most conventional boilers, it is judged whether there is water in a water tank through a water level electrode having a characteristic of short-circuiting electrically only when there is water when a commercial power is supplied, that is, a low water level electrode type water level meter, The freezing temperature is detected using a thermistor, and when the temperature is lower than a specific temperature (that is, freezing temperature), the heater and the circulation pump are driven to heat and circulate the water in the boiler to prevent the freezing.

At this time, the water level electrode installed in the water tank of the boiler to detect the full water level and the low water level, the water level electrode provided in the high water level or low water level electrode type water type, when it is completely frozen, The control unit receiving the output signal of the level electrode judges that the water in the water tank is completely frozen as if the water in the water tank is completely frozen and judges that it is completely frozen And then performs the operation of supplying water to the boiler after commissioning or transition to heating or hot water.

However, when the water in the water tank is completely frozen as described above, it is judged that there is no water and the water is supplied to the boiler after performing trial operation or transition to heating or hot water, If the water level in the tank is detected by the water level electrode, it is possible that the control unit controls the combustion of the burner or activates the circulation pump although the inside is actually frozen.

If the control unit detects the water level in the state where each pipe or the like in the boiler is frozen, when the burner in the boiler is operated to operate by the control unit, there is a possibility that the heat exchanger is burned due to boiling or the like, There is a possibility that the circulation pump may be operated. In addition, when the circulation pump is operated, the circulation pump may fail.

In addition, when the pipe inside the boiler is frozen and it is judged that the pump is completely frozen, the pump is driven to determine freezing even though it is for a short period of time. In this case, however, .

In addition, in the case of a system for judging whether there is a water level or water in a water tank through a water level electrode used as a high water level and low water level electrode type water level, a film is formed around the electrode depending on the degree of contamination of water during long- There is also a problem.

1. Korean Patent Publication No. 1995-0009122 (August 14, 1995)

SUMMARY OF THE INVENTION It is an object of the present invention to provide a float switch that operates mechanically in a water tank of a boiler and a low level electrode type water level meter which is a water level electrode at the same time, When the initial power supply voltage is supplied to the boiler, the state of the float switch installed in the water tank and the low-level electrode type water level are continuously judged. If the boiler is in the "on" state, the temperature detected through the thermistor installed in the boiler body is checked The float switch is operated to judge the complete freezing of the heat exchanger which is more likely to float, and the float switch is inputted with the "ON" signal, but the low water level The electrode-type water level meter has an "off" signal and the water in the water tank is frozen If it is judged that the circulation pump is completely frozen during the operation of the circulation pump, the display of the circulation pump is completely frozen after the safety stop, so that when the pipe is frozen in the boiler, the water level electrode detects the water level, It is possible to prevent not only the burning of the heat exchanger due to the combustion operation but also the fire and the like, as well as to shorten the lifetime of the circulation pump or to prevent burnout and breakdown. In particular, The present invention provides a method of determining the complete freezing of the boiler during initial power supply, which can accurately determine whether the boiler has been frozen or not.

To achieve the above object, according to the present invention, there is provided a method of controlling a boiler, comprising: sequentially determining whether a float switch and a low-level electrode-type water level meter installed in a water tank are respectively in an & If the float switch and the low-level electrode type water level meter are both in the "on" state, it is determined that the temperature detected through the thermistor installed in the boiler body is below the complete freeze determination temperature; If it is determined that the temperature in the boiler body is lower than the complete freezing determination temperature, driving the circulation pump to determine the complete freezing of the heat exchanger, .

In addition, during the operation of the circulation pump as described above, the temperature in the main body is continuously read through the thermistor to determine whether the detected temperature is below the complete freezing temperature. If the temperature in the main body of the circulating pump is below the full freezing temperature, the operation of the circulating pump is safely stopped and the complete freezing determination is terminated.

If the float switch is not "on ", the control unit recognizes that there is no water in the water tank and terminates the complete freezing determination.

If the float switch is in the ON state, but the low-level electrode type water level meter is not ON, the control unit recognizes water in the water tank as frozen, and ends the complete freezing determination.

When the temperature in the main body detected through the power supply initial thermistor is higher than the complete freezing determination temperature or higher than the complete freezing temperature during the circulating pump operation, the complete freezing determination is terminated.

If the float switch is in the "on" state or the low-level electrode type water level is not "on ", the control unit displays the completely frozen state through the display unit Wherein the step further comprises performing the step further.

As described above, according to the method of completely freezing the boiler during the initial power supply of the present invention, the float switch that operates mechanically in the water tank of the boiler and the low-level electrode type water level meter which is the water level electrode are simultaneously installed, When the initial power supply voltage is supplied to the boiler which has not been supplied for a long time, the state of the float switch and the low-level electrode type water level meter installed in the water tank are continuously judged, The float switch is operated to judge the complete freezing of the heat exchanger having a higher possibility of actual water flooding, and the float switch is operated in the " On "signal is inputted, but the low-level electrode-type water level meter outputs the" If it is determined that the water in the water tank is frozen or the temperature in the main body is completely frozen during the operation of the circulation pump through the operation of the circulation pump, the display unit displays a completely frozen state after the circulation pump is stopped, The water level electrode detects the water level of the partially molten water in the state where the water level electrode is frozen, thereby preventing the burning of the heat exchanger caused by the burning operation of the burner as well as the fire and the like. It can be prevented in advance.

In the present invention, the water level in the water tank and the frozen state are detected through a float switch that operates mechanically and a contact-type low-level electrode type water level meter, which is a water level electrode, so that water in the water tank is frozen It is possible to remarkably improve the reliability according to the judgment of complete freezing performed after the initial power supply voltage is supplied.

1 is a schematic block diagram of a boiler to which the method of the present invention is applied;
2 is a flow chart for explaining the method of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention and their operation and effect will be described in detail with reference to the accompanying drawings.

FIG. 1 is a schematic block diagram of a boiler to which the method of the present invention is applied, and FIG. 2 is a flow chart for explaining the method of the present invention.

According to the present invention,

When the initial power supply voltage is supplied to the boiler, steps S1 and S2 are performed to sequentially determine whether the float switch 1 and the low-level electrode-type water level meter 2 installed in the water tank are in the " Wow;

If the float switch 1 and the low-level electrode type water level meter 2 are both in the "ON" state as a result of the determination in the steps S1 and S2, the temperature detected through the thermistor 3 installed in the boiler body is completely frozen Determining whether the temperature is T1 or lower (S3);

As a result of the determination in step S3, if the temperature in the boiler body is less than the complete freezing determination temperature (T1 DEG C), it is determined that the cistern is watery, but in order to determine the complete freezing of the heat exchanger, (S4) driving the pump (5).

(S5) of reading the temperature in the main body through the thermistor 3 continuously while the circulation pump 5 is operated and determining whether the detected temperature is equal to or lower than the complete freezing temperature (T2 DEG C) ;

If the temperature in the main body of the circulating pump is less than the complete freezing temperature (T2 占 폚) as a result of the determination in the step S5, the operation of the circulating pump 5 is stopped safely (S6) and the complete freezing determination is terminated (S8); Is further performed.

If the float switch 1 is not "on ", the control unit 4 recognizes that there is no water in the water tank and ends the complete freezing determination (S8).

If the float switch 1 is in the "ON" state in the step S1 and the low-level electrode type water level meter 2 is not "ON" in the next step S2, the control unit 4 has water in the water tank It is recognized as frozen and the complete freezing determination is terminated (S8).

If the temperature in the main body detected through the power supply initial thermistor 3 in step S3 is higher than the complete freezing determination temperature T1 or more than the complete freezing temperature T2 during the operation of the circulating pump 5 (S8), the complete freezing determination is terminated.

After the circulation pump 5 is stopped safely in step S6 or the float switch 1 determined in steps S1 and S2 is in the ON state or the low water level electrode type water level meter 2 is in the ON state, (S7) of displaying a completely frozen state through the display unit 7 prior to the end of the complete freezing determination (S8) when the control unit 4 is not " on " do.

The operation and effect of the method of determining the complete freezing of the boiler during the initial power supply of the present invention having the above steps will be described as follows.

FIG. 1 is a schematic block diagram of a boiler to which the method of the present invention is applied. In the boiler, a float switch 1 for detecting whether or not water is present in a water tank and a low- And a low-level electrode-type water level gauge 2. The thermistor 3 detects in real time the temperature of air in the main body and transmits the detected temperature to the control unit 4.

In addition, various kinds of information output from the float switch 1, the low-level electrode-type water level meter 2, and the thermistor 3 are received and a predetermined control program is executed to control the driving of the circulation pump 5, And a circulation pump driving unit 6 for driving the circulation pump 5 in response to an output signal of the control unit 4 as well as a control unit 4 for outputting information displayed on the display unit 7, And a display unit 7 for displaying the image.

2, when the initial power supply voltage is supplied to the boiler in which the commercial power is not supplied, the float switch 1 installed in the water tank in the control unit 4 and the low- And sequentially determines whether the water level meter 2 is in the "on" state (S1, S2).

If it is determined that the micro-switch is turned on and the micro-switch is lowered to a predetermined level or lower when the fu- ture is higher than the predetermined water level corresponding to the water level change, State, the float switch 1 whose switch is turned "off " and the low-level electrode-type water level meter 2 whose current flows only in the water are both in the" (S3) whether or not the temperature detected through the thermistor 3 installed in the boiler body is equal to or less than the determined complete freeze determination temperature T1.

If it is determined in step S3 that the temperature detected through the thermistor 3 is equal to or less than the determined complete freezing determination temperature T1 ° C, if the temperature in the boiler body is less than the complete freezing determination temperature T1 ° C, The circulation pump 5 is driven to judge the complete freezing of the heat exchanger having a higher probability of actual water rupture. However, since the water in the piping (not shown) including water in the piping may be frozen, (S4).

While the circulation pump 5 is being operated as described above, the control unit 4 reads the temperature in the main body through the thermistor 3 continuously to determine whether the detected temperature is equal to or less than the complete freezing temperature (T2 DEG C) (S5).

If the temperature in the main body of the circulation pump is less than the complete freezing temperature (T2 ° C) as a result of the determination in the step S5, the control unit 4 stops the operation of the circulation pump 5 safely (S6) The judgment is terminated (S8).

On the other hand, if it is determined in step S1 that the float switch 1 is not "on", the controller 4 ends the complete freezing determination (S8).

Therefore, the float switch 1, which is mechanically operated independently of the state of the low-level electrode-type water level gauge 2 that operates sensitively according to the degree of contamination of water in the water tank (regardless of the degree of contamination of water in the water tank) It is possible to accurately determine that the water is completely frozen, and in this case, since the frost prevention operation itself is not performed, the water level electrode in the boiler is frozen, It is possible to prevent burning of the heat exchanger due to the burning operation of the burner, as well as to prevent fire or the like, as well as to prevent burnout and breakdown, including shortening the life of the circulation pump 5, in advance.

If the result of the determination in step S1 is that the float switch 1 is in the ON state or is not ON in the next step S2 as a result of determining the state of the low water level electrode type water level meter 2, It is determined that there is water in the water tank because the float switch 1 is in the ON state in the control unit 4 but the water level indicator 2 in the water tank is in the OFF state, Is completely frozen and recognizes that no current flows between the contacts of the low water level indicator type water level meter 2, and the complete freezing determination is terminated (S8).

Therefore, as described above, when the water in the water tank is completely frozen, the burning operation of the burner or the operation of the circulation pump 5 for preventing the freezing of the water, It can be prevented in advance.

If the temperature in the main body detected through the power supply initial thermistor 3 in step S3 is higher than the complete freezing determination temperature T1 or higher than the complete freezing temperature T2 during the circulating pump operation, The temperature in the main body is determined to be a high temperature at which there is no possibility of freezing, and the complete freezing determination is terminated (S8).

According to the present invention, after the initial power supply voltage is supplied, the state of the water in the water tank is judged to be in a completely frozen state so that the circulation pump 5 is stopped safely (S6) When the float switch 1 is in the "ON" state or the low-level electrode type water level meter 2 is not "on", before the control unit 4 terminates the complete freezing judgment (S8), the display unit 7 (S7) indicating that it is completely frozen.

Accordingly, the service man of the boiler including the consumer checks the completely frozen state display character or the error symbol displayed on the display unit 7, accurately confirms why the operation of the boiler is stopped, The reliability according to the complete freezing determination method performed after the initial power supply voltage is supplied can be greatly improved. In addition, unnecessary service requests can be prevented, and the merchantability of the boiler itself can be greatly improved.

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: Float switch
2: Low water level water level meter
3: Thermistor
4:
5: Circulation pump
6: Circulating pump drive
7:

Claims (6)

When the initial power supply voltage is supplied to the boiler, sequentially determining whether the float switch installed in the water tank and the low-level electrode-type water level meter are "on"
If the float switch is in the " on "state or the low-level electrode type water level is not" on ", the control unit recognizes water in the water tank as frozen, Determination of complete freezing of boiler during initial power supply.
The method according to claim 1,
When the float switch and the low-level electrode type water level meter are both in the "on" state, the temperature detected through the thermistor installed in the boiler body is completely frozen Determining whether the temperature is below a predetermined temperature;
If it is determined that the temperature in the boiler body is lower than the complete freezing temperature, the circulation pump is driven to determine the complete freezing of the heat exchanger, Wherein the freezing of the boiler during the initial power supply is determined. The method of claim 2,
Continuously reading the temperature in the main body through the thermistor while the circulation pump is operating, and determining whether the detected temperature is below the full freezing temperature;
And a step of stopping the operation of the circulation pump by stopping the operation of the circulation pump and completely stopping the freezing when the temperature inside the main body during the operation of the circulation pump is below the full freezing temperature. Way.
The method according to claim 1,
If the float switch is not "on ", the control unit recognizes that there is no water in the water tank and terminates the complete freezing determination.
The method according to claim 2 or 3,
When the temperature in the main body detected through the power supply initial thermistor is higher than the complete freezing determination temperature or when the temperature in the main body is higher than the complete freezing temperature during driving of the circulating pump, the complete freezing determination is terminated. Way.
The method according to claim 1 or 3,
When the float switch is in an "on" state or when the low-level electrode-type water level indicator is not "on ", or when the circulation pump is shut down safely, Further comprising the step of performing a further freezing of the boiler during the initial power supply.













KR20130047179A 2013-04-29 2013-04-29 Method for judging total freeze and preventing freeze of boiler when turning on power supply KR20140128591A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20170013458A (en) 2015-07-27 2017-02-07 린나이코리아 주식회사 How boiler control my judgment complete frozen and freeze protection operation accordingly
CN112361607A (en) * 2020-10-26 2021-02-12 珠海格力电器股份有限公司 Water heater system control method and device and water heater system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20170013458A (en) 2015-07-27 2017-02-07 린나이코리아 주식회사 How boiler control my judgment complete frozen and freeze protection operation accordingly
CN112361607A (en) * 2020-10-26 2021-02-12 珠海格力电器股份有限公司 Water heater system control method and device and water heater system
CN112361607B (en) * 2020-10-26 2022-04-05 珠海格力电器股份有限公司 Water heater system control method and device and water heater system

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