EP3789691A1 - Kessel - Google Patents

Kessel Download PDF

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Publication number
EP3789691A1
EP3789691A1 EP19796904.1A EP19796904A EP3789691A1 EP 3789691 A1 EP3789691 A1 EP 3789691A1 EP 19796904 A EP19796904 A EP 19796904A EP 3789691 A1 EP3789691 A1 EP 3789691A1
Authority
EP
European Patent Office
Prior art keywords
water
hot
heat exchanger
temperature
circulated
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP19796904.1A
Other languages
English (en)
French (fr)
Other versions
EP3789691A4 (de
Inventor
Jung Keom Kim
Chang Heoi HU
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kyungdong Navien Co Ltd
Original Assignee
Kyungdong Navien Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kyungdong Navien Co Ltd filed Critical Kyungdong Navien Co Ltd
Priority claimed from PCT/KR2019/005331 external-priority patent/WO2019212291A1/ko
Publication of EP3789691A1 publication Critical patent/EP3789691A1/de
Publication of EP3789691A4 publication Critical patent/EP3789691A4/de
Pending legal-status Critical Current

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Classifications

    • 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
    • F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/48—Water heaters for central heating incorporating heaters for domestic water
    • F24H1/52—Water heaters for central heating incorporating heaters for domestic water incorporating heat exchangers for domestic water
    • F24H1/523—Heat exchangers for sanitary water directly heated by the burner
    • 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
    • F24D17/00—Domestic hot-water supply systems
    • F24D17/0026—Domestic hot-water supply systems with conventional heating means
    • F24D17/0031—Domestic hot-water supply systems with conventional heating means with accumulation of the heated water
    • 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
    • F24D19/1066—Arrangement or mounting of control or safety devices for water heating systems for the combination of central heating and domestic hot water
    • F24D19/1069—Arrangement or mounting of control or safety devices for water heating systems for the combination of central heating and domestic hot water regulation in function of the temperature of the domestic hot water
    • 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
    • F24D3/00—Hot-water central heating systems
    • F24D3/08—Hot-water central heating systems in combination with systems for domestic hot-water supply
    • 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
    • F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/48—Water heaters for central heating incorporating heaters for domestic water
    • F24H1/50—Water heaters for central heating incorporating heaters for domestic water incorporating domestic water tanks
    • 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
    • F24H9/14—Arrangements for connecting different sections, e.g. in water heaters 
    • F24H9/146—Connecting elements of a heat exchanger
    • 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
    • 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

Definitions

  • the present disclosure relates to a boiler, and more particularly, relates to a boiler having an improved ability to supply hot-water.
  • Boilers are used for heating or hot-water in general homes, public buildings, or the like.
  • a boiler combusts a fuel such as oil or gas through a burner, heats water using heat of combustion generated in the combustion process, and circulates the heated water indoors to perform heating or supply hot-water as needed.
  • FIG. 1 illustrates a conventional boiler 1.
  • the conventional boiler 1 may include a main heat exchanger 2 for heating heating-water using heat of combustion of a burner, a three-way valve 4 for switching a flow path to a heating mode or a hot-water mode, a circulation pump 5 for circulating water, and a hot-water heat exchanger 3 for supplying hot-water by heat exchange of raw-water.
  • the conventional boiler including the aforementioned components simultaneously performs a heating function and a hot-water function.
  • the conventional boiler has a limitation in an ability to supply hot-water in a raw-water type when a larger amount of heat than the limited amount of heat is required.
  • a larger amount of heat than the maximum amount of heat of the burner in the boiler may be required to generate hot-water at a temperature requested by a user.
  • An aspect of the present disclosure provides a boiler for improving an ability to supply hot-water and increasing the time during which hot-water at a set temperature or more is supplied, by raising the temperature of circulated-water supplied to a main heat exchanger.
  • Another aspect of the present disclosure provides a boiler for supplying hot-water at an accurate temperature and improving the durability of a burner by using an electronic mixing valve.
  • a boiler according the present disclosure includes a main heat exchanger that heats circulated-water, which is introduced-water, by heat of combustion of a burner, a hot-water supply heat exchanger that is supplied with heated-water generated by heating the circulated-water in the main heat exchanger and that generates hot-water by heating raw-water by heat exchange with the heated water, and a heating-water storage tank that stores high-temperature water to raise temperature of the circulated-water supplied to the main heat exchanger and that is provided on a return flow path along which the heated-water released from the hot-water supply heat exchanger returns as at least part of the circulated-water to the main heat exchanger, the high-temperature water having a higher temperature than the heated-water released from the hot-water supply heat exchanger when the hot-water is generated by the hot-water supply heat exchanger.
  • the boiler according to the embodiment of the present disclosure may raise the temperature of circulated-water supplied to the main heat exchanger, thereby improving an ability to supply hot-water and increasing the time during which hot-water at a set temperature or more is supplied.
  • the electronic mixing valve may enable the supply of hot-water at an accurate temperature and may improve the durability of the burner.
  • a boiler 100 includes a main heat exchanger 200, a hot-water supply heat exchanger 300, and a heating-water storage tank 400.
  • the main heat exchanger 200 heats circulated-water, which is introduced-water, by heat of combustion of a burner.
  • the circulated-water supplied to the main heat exchanger 200 may be circulated from an object 10 being heated or the hot-water supply heat exchanger 300.
  • the introduced circulated-water may be heated by the heat of combustion of the burner of the main heat exchanger 200, and the heated-water may be released from the main heat exchanger 200.
  • no limitation applies to the type of the main heat exchanger 200 and for example, a shell-and-tube type heat exchanger may be applied.
  • the hot-water supply heat exchanger 300 is supplied with the heated-water generated by heating the circulated-water in the main heat exchanger 200 and generates hot-water by heating raw-water by heat exchange with the heated-water. At this time, the temperature of the heated-water supplied to the hot-water supply heat exchanger 300 is lowered after the heated-water indirectly exchanges heat with the raw-water.
  • the heating-water storage tank 400 is provided on a return flow path along which the heated-water released from the hot-water supply heat exchanger 300 returns as at least part of the circulated-water to the main heat exchanger 200. Furthermore, to raise the temperature of the circulated-water supplied to the main heat exchanger 200, the heating-water storage tank 400 stores high-temperature water having a higher temperature than the heated-water released from the hot-water supply heat exchanger 300 when the hot-water is generated by the hot-water supply heat exchanger 300.
  • the heated-water released from the hot-water supply heat exchanger 300 may be circulated as the circulated-water to the main heat exchanger 200.
  • the heating-water storage tank 400 may be provided on the return flow path along which the heated-water released from the hot-water supply heat exchanger 300 returns to the main heat exchanger 200. That is, the heating-water storage tank 400 may be provided behind (downstream of) the hot-water supply heat exchanger 300 with respect to the flow of the heated-water. Accordingly, the heated-water heat-exchanged in the hot-water supply heat exchanger 300 may pass through the heating-water storage tank 400 and may return to the main heat exchanger 200.
  • the heating-water storage tank 400 may store the high-temperature water inside.
  • the high-temperature water in the heating-water storage tank 400 may have a higher temperature than the heated-water released from the hot-water supply heat exchanger 300 when the hot-water is generated. Accordingly, the heated-water, the temperature of which is lowered by the heat exchange in the hot-water supply heat exchanger 300, may return to the main heat exchanger 200 after the temperature of the heated-water is raised by the high-temperature water while the heated-water passes through the heating-water storage tank 400. That is, the temperature of the circulated-water returning from the hot-water supply heat exchanger 300 to the main heat exchanger 200 may be raised by the high-temperature water in the heating-water storage tank 400.
  • the high-temperature circulated-water may be supplied to the main heat exchanger 200 by the heating-water storage tank 400 disposed behind the hot-water supply heat exchanger 300, and thus the temperature of the heated-water flowing from the main heat exchanger 200 to the hot-water supply heat exchanger 300 may also be raised.
  • the boiler 100 according to the present disclosure may increase the time during which the hot-water at a set temperature or more is supplied. That is, according to the present disclosure, the ability of the boiler 100 to supply the hot-water may be improved.
  • the boiler 100 including the heating-water storage tank 400 may accumulate energy by heating water in the heating-water storage tank 400 through preheating when a user does not use hot-water and may use the accumulated energy as auxiliary heat when the user uses hot-water, thereby supplementing a deficient portion due to the limited combustion supply heat of the burner.
  • the heating-water storage tank 400 may raise the temperature of the circulated-water, which is supplied to the main heat exchanger 200, to reduce the amount of heat applied by the burner to generate the heated-water having a preset target temperature.
  • the heated-water supplied from the main heat exchanger 200 to the hot-water supply heat exchanger 300 has the preset target temperature so as to generate the hot-water.
  • the burner supplies heat of combustion to heat the circulated-water supplied to the main heat exchanger 200 above the target temperature.
  • the heating-water storage tank 400 may lower the load of the burner by raising the temperature of the circulated-water by the high-temperature water stored in the heating-water storage tank 400. That is, the heating-water storage tank 400 may reduce the amount of heat applied by the burner to generate the heated-water having the preset target temperature. Accordingly, the boiler 100 having the burner with the same capacity may have an improved ability to supply the hot-water.
  • the heating-water storage tank 400 may be supplied with the heated-water released from the hot-water supply heat exchanger 300 and may supply the high-temperature water or a mixture of the high-temperature water and the heated-water to the main heat exchanger 200 as at least part of the circulated-water.
  • the heating-water storage tank 400 may be supplied with the heated-water as the high-temperature water.
  • the heating-water storage tank 400 is supplied with the heated-water from the main heat exchanger 200. At this time, the supplied heated-water is not heat-exchanged in the hot-water supply heat exchanger 300.
  • the heated-water in the heating-water storage tank 400 may be supplied to the main heat exchanger 200.
  • the heating-water storage tank 400 may store the high-temperature water therein while the heated-water is circulated between the main heat exchanger 200 and the heating-water storage tank 400.
  • the high-temperature water stored in the heating-water storage tank 400 may be supplied to the main heat exchanger 200 as the circulated-water.
  • a mixture of the heated-water introduced into the heating-water storage tank 400 through the hot-water supply heat exchanger 300 and the high-temperature water may be supplied to the main heat exchanger 200 as the circulated-water.
  • the heating-water storage tank 400 may raise the temperature of the circulated-water supplied to the main heat exchanger 200.
  • the boiler 100 may further include a circulated-water line 510, a supply line 520, a first connecting line 540, and a three-way valve 530.
  • the present disclosure may further include a second connecting line 550 and a third connecting line 560.
  • the circulated-water line 510 may connect the object 10 being heated and the main heat exchanger 200 and may introduce the circulated-water into the main heat exchanger 200 from the object 10 being heated.
  • the supply line 520 may supply the heated-water from the main heat exchanger 200 to the object 10 being heated.
  • the first connecting line 540 may connect the supply line 520 and the hot-water supply heat exchanger 300 to supply the heated-water from the main heat exchanger 200 to the hot-water supply heat exchanger 300.
  • the three-way valve 530 may be provided at a connection point between the supply line 520 and the first connecting line 540 and may switch a flow path such that the heated-water supplied from the main heat exchanger 200 is supplied to at least one of the object 10 being heated or the hot-water supply heat exchanger 300. Specifically, when the hot-water is generated, the three-way valve 530 may switch the flow path such that the main heat exchanger 200 and the hot-water supply heat exchanger 300 are connected. Furthermore, when heating is performed, the three-way valve 530 may switch the flow path such that the main heat exchanger 200 and the object 10 being heated are connected.
  • the second connecting line 550 may connect the hot-water supply heat exchanger 300 and the heating-water storage tank 400
  • the third connecting line 560 may connect the heating-water storage tank 400 and the circulated-water line 510.
  • the above-described return flow path may be implemented by the second connecting line 550, the third connecting line 560, and the circulated-water line 510.
  • the heated-water passing through the hot-water supply heat exchanger 300 may be introduced into the heating-water storage tank 400 through the second connecting line 550, and the heated-water introduced into the heating-water storage tank 400 may be mixed with the high-temperature water and may be supplied to the main heat exchanger 200 through the third connecting line 560 and the circulated-water line 510.
  • part of the high-temperature water in the heating-water storage tank 400 may be introduced into the main heat exchanger 200.
  • the heating-water storage tank 400 applied to the present disclosure may be located on the return flow path, that is, behind the hot-water supply heat exchanger 300 with respect to the flow of the heated-water. Accordingly, the heating-water storage tank 400 may be more effective than when the heating-water storage tank 400 is located in front of the hot-water supply heat exchanger 300.
  • the boiler 100 may include a circulation pump 511 and an expansion tank 513 on the circulated-water line 510.
  • the circulation pump 511 may be provided on the circulated-water line 510 to introduce the circulated-water.
  • the expansion tank 513 may be provided on the circulated-water line 510 upstream of the circulation pump 511 to absorb a volume change caused by a change in the temperature of the circulated-water.
  • the circulation pump 511 may be provided on the circulated-water line 510 downstream of a connection point between the third connecting line 560 and the circulated-water line 510 to supply the circulated-water.
  • the expansion tank 513 may be provided on the circulated-water line 510 between the circulation pump 511 and the connection point between the third connecting line 560 and the circulated-water line 510 to absorb a volume change caused by a change in the temperature of the circulated-water.
  • the temperature of the circulated-water supplied to the main heat exchanger 200 may be raised by the heating-water storage tank 400, and therefore the expansion tank 513 applied to the present disclosure may not include a separate heater for preheating. That is, hot-water performance is improved by the high-temperature heating water stored in the heating-water storage tank 400, and therefore the expansion tank 513 does not require a separate heater.
  • FIGS. 5 to 7 differs from the embodiment of the present disclosure in that the heating-water storage tank 400 is installed in front of the hot-water supply heat exchanger 300.
  • reference numerals identical to those in the present disclosure are used in FIGS. 5 to 7 and the following description.
  • the heating-water storage tank 400 according to the comparative example may be installed in front of the hot-water supply heat exchanger 300, that is, between the main heat exchanger 200 and the hot-water supply heat exchanger 300.
  • FIGS. 6 and 7 are graphs depicting temperatures over time at points illustrated in FIG. 5 . For example, in FIGS.
  • R is a graph depicting the temperature of circulated-water supplied to the main heat exchanger 200
  • M is a graph depicting the temperature of heated-water released from the main heat exchanger 200
  • SI is a graph depicting the temperature of the heated-water supplied to the heating-water storage tank 400
  • SO is a graph depicting the temperature of the heated-water released from the heating-water storage tank 400.
  • I is a graph depicting the temperature of raw-water
  • O is a graph depicting the temperature of hot-water generated by heat exchange in the hot-water supply heat exchanger 300.
  • the hot-water when the hot-water is generated, high-temperature water stored in the heating-water storage tank 400 is supplied to the hot-water supply heat exchanger 300 and performs indirect heat exchange with the raw-water. Accordingly, even before the heated-water at the target temperature or more is generated in the main heat exchanger 200, the hot-water may be supplied immediately from the time when the generation of the hot-water is requested.
  • the high-temperature water, or a mixture of the high-temperature water and the heated-water, which is supplied to the hot-water supply heat exchanger 300 via the heating-water storage tank 400 may experience a temperature drop while being heat-exchanged in the hot-water supply heat exchanger 300 and may be supplied as the circulated-water to the main heat exchanger 200 in the low-temperature state. Accordingly, after some time point, the amount of heat required to heat the circulated-water above a temperature for the generation of the hot-water may exceed the maximum amount of heat of combustion of the burner. At this time, the temperature of the heated-water supplied from the main heat exchanger 200 to the hot-water supply heat exchanger 300 is lowered, and therefore the amount of heat required for the supply of the hot-water is not satisfied.
  • the main heat exchanger 200 is implemented with a shell-and-tube type heat exchanger. Furthermore, when the hot-water is not used, water in the main heat exchanger 200 and water in the heating-water storage tank 400 are in a state of being pre-heated to 80 degrees Celsius.
  • the maximum amount of heat of the burner is 22,360kcal/h, and considering an internal circulation flow rate, the temperature that can be raised in the main heat exchanger 200 is 22.5 degrees Celsius when the maximum amount of heat of the burner is supplied.
  • the temperature of the hot-water requested by a user is 40 degrees Celsius, the amount of heat required for the supply of the hot-water is 36,000kcal/h.
  • the hot-water at a preset hot-water temperature may be supplied until predetermined initial time by using the amount of heat accumulated in the heating-water storage tank 400.
  • FIG. 7 it can be seen that in the case of the comparative example, hot-water at more than 40 degrees Celsius that is a hot-water temperature requested by the user is able to be supplied until about 240 seconds.
  • the maximum value of the temperature of the circulated-water is small because the heated-water passing through the hot-water supply heat exchanger 300 experiences a temperature drop due to heat exchange. That is, at the time point when about 26 seconds have elapsed, the temperature of the circulated-water supplied to the main heat exchanger 200 reaches a maximum value of about 42.8 degrees Celsius. It can be seen that when the main heat exchanger 200 supplies the maximum amount of heat to the circulated-water at the maximum temperature (about 42.8 degrees Celsius), the temperature of the heated-water supplied by the main heat exchanger 200 is about 65.3 degrees Celsius even though the maximum temperature (about 22.5 degrees Celsius) that can be raised is added.
  • the temperature of the heated-water supplied by the main heat exchanger 200 fails to rise above 80 degrees Celsius that is the initial temperature of the high-temperature water stored in the heating-water storage tank 400 and the same is true of the temperature of water supplied to the hot-water supply heat exchanger 300.
  • the released-water temperature is maintained above 40 degrees Celsius, which is the preset hot-water temperature requested by the user, for a short time of about 240 seconds.
  • the released-water temperature is the temperature of water released after generated by mixing the raw-water with the hot-water generated by being heat-exchanged in the hot-water supply heat exchanger 300.
  • FIGS. 3 and 4 are graphs depicting temperatures over time at points illustrated in FIG. 2 .
  • “R” is a graph depicting the temperature of circulated-water supplied to the main heat exchanger 200
  • "M” is a graph depicting the temperature of heated-water released from the main heat exchanger 200
  • "SI” is a graph depicting the temperature of the heated-water supplied to the heating-water storage tank 400
  • “SO” is a graph depicting the temperature of the heated-water released from the heating-water storage tank 400.
  • I is a graph depicting the temperature of raw-water
  • “O” is a graph depicting the temperature of hot-water generated by heat exchange in the hot-water supply heat exchanger 300.
  • the temperature of the high-temperature water in the heating-water storage tank 400 is equal to the temperature of the circulated-water at the start of hot-water supply.
  • the temperature of the heated-water released after heat-exchanged in the hot-water supply heat exchanger 300 is raised by the heating-water storage tank 400, and therefore the temperature of the circulated-water returning to the main heat exchanger 200 may be raised.
  • the temperature of the circulated-water of the present disclosure is about 70.7 degrees Celsius at 26 seconds at which the temperature of the circulated-water in the comparative example has a maximum value (about 42.8 degrees Celsius).
  • the temperature of the circulated-water plus the temperature (about 22.5 degrees Celsius) that can be raised when the main heat exchanger 200 supplies the maximum amount of heat equals about 93.2 degrees Celsius. That is, as the temperature of the circulated-water is raised, the temperature of the heated-water supplied by the main heat exchanger 200 may rise above 80 degrees Celsius that is the initial temperature of the high-temperature water stored in the heating-water storage tank 400, and the same is true of the temperature of the heated-water introduced into the hot-water supply heat exchanger 300.
  • the amount of heat that enables the supply of the hot-water at the preset hot-water temperature for a long time corresponding to the temperature rise and drop may be supplied.
  • the time during which the released-water temperature is maintained above 40 degrees Celsius, which is the preset hot-water temperature requested by the user is about 434 seconds that is longer than that in the comparative example of FIG. 7 .
  • the hot-water at the preset hot-water temperature is able to be supplied for a longer period of time.
  • the heating-water storage tank 400 when the heating-water storage tank 400 is installed behind the hot-water supply heat exchanger 300 as in the present disclosure (refer to FIG. 2 ), the heating-water storage tank 400 may have a similar ability to supply hot-water even though having a small tank capacity, as compared with when the heating-water storage tank 400 is installed in front of the hot-water supply heat exchanger 300 as in the comparative example (refer to FIG. 5 ). That is, according to the present disclosure, the heating-water storage tank 400 may have a high ability to supply hot-water despite a small tank capacity.
  • Table 1 below shows the time (seconds) during which the hot-water at the preset hot-water temperature or more is able to be supplied, depending on a tank capacity L according to the comparative example and the embodiment of the present disclosure.
  • the time during which the hot-water is able to be supplied was tested for ignition delay time of 10 seconds and ignition delay time of 30 seconds.
  • A-1, A-2, and A-3 are experimental examples according to the comparative example illustrated in FIG. 5
  • B-1, B-2, and B-3 are experimental examples according to the embodiment of the present disclosure illustrated in FIG. 2 .
  • the ignition delay time is 10 seconds
  • the time (189 seconds) during which the hot-water at the preset hot-water temperature or more is able to be supplied in the case where the heating-water storage tank 400 has a capacity of 10 L is similar to the time (181 seconds) during which the hot-water at the preset hot-water temperature or more is able to be supplied in the case where the heating-water storage tank 400 has a capacity of 20 L.
  • the boiler 100 may further include a raw-water line 610, a hot-water line 620, a mixing line 630, and a mixing valve 631.
  • the raw-water to be heat-exchanged in the hot-water supply heat exchanger 300 may be supplied through the raw-water line 610, and the hot-water generated by heat exchange in the hot-water supply heat exchanger 300 may be released through the hot-water line 620.
  • the mixing line 630 may be connected between the raw-water line 610 and the hot-water line 620, and the mixing valve 631 may be installed on the mixing line 630 and may open and close the mixing line 630 to supply the raw-water to the hot-water line 620.
  • the raw-water may be mixed with the hot-water by the mixing line 630 and the mixing valve 631, and a problem that the temperature of the hot-water is raised may be solved.
  • the released-water temperature may be adjusted to a temperature set by the user in a case where the temperature of initial hot-water is raised by the high-temperature water stored in the heating-water storage tank 400.
  • the boiler 100 may further include a hot-water temperature sensor 621 provided on the hot-water line 620 upstream of a connection point between the hot-water line 620 and the mixing line 630.
  • the mixing valve 631 may be an electronic valve that is automatically controlled depending on the preset hot-water temperature and the temperature measured by the hot-water temperature sensor 621.
  • the mixing valve 631 may be an electronic valve rather than a mechanical valve, and the hot-water temperature sensor 621 may be mounted at an exit side of the hot-water generated through heat exchange in the hot-water supply heat exchanger 300. When the hot-water is generated, the mixing valve 631 may be continually automatically controlled to mix the raw-water depending on the preset hot-water temperature set by the user.
  • a mechanical valve is manufactured such that it is difficult or impossible for the user to randomly adjust the mechanical valve. Therefore, in a case where a mechanical valve is used as the mixing valve 631, the temperature of the heated-water flowing into the hot-water supply heat exchanger 300 is controlled by shortening the combustion ON/OFF cycle of the burner based on the target temperature of the heated-water because a heating-value controller (not illustrated) provided in the boiler 100 cannot recognize the set temperature of the mixing valve 631. That is, in this case, due to the use of the mechanical mixing valve 631, the mixing opening degree of which is fixed, the combustion ON/OFF of the burner is performed in consideration of the temperature of the heated-water to meet the released-water temperature, and therefore the combustion cycle of the burner may be shortened. Due to the frequent combustion ON/OFF cycle, the durability of the burner may be degraded.
  • the hot-water temperature sensor 621 may consistently measure the temperature of the hot-water, and the opening/closing or the opening degree of the electronic mixing valve 631 may be automatically controlled depending on the temperature of the hot-water measured by the hot-water temperature sensor 621. That is, in the case of the present disclosure, as the mixing valve 631 is electronically adjusted, the released-water temperature may be adjusted.
  • the electronic mixing valve 631 hot-water at an accurate temperature may be supplied, the combustion ON/OFF cycle may be lengthened, and the durability of the burner may be improved.
  • the heating-water storage tank 400 of the present disclosure may be provided on a flow path along which the heated-water released from the hot-water supply heat exchanger 300 or the heated-water returning from the object 10 being heated returns to the main heat exchanger 200 as the circulated-water.
  • the heating-water storage tank 400 may store the high-temperature water having a higher temperature than the heated-water released from the hot-water supply heat exchanger 300 when the hot-water is generated by the hot-water supply heat exchanger 300.
  • the heating-water storage tank 400 may be installed on the flow path connecting the hot-water supply heat exchanger 300 and the circulated-water line 510. At this time, the heating-water storage tank 400 is provided on the flow path along which the heated-water released from the hot-water supply heat exchanger 300 returns to the main heat exchanger 200 as the circulated-water.
  • the position of the heating-water storage tank 400 applied to the present disclosure is not limited to the aforementioned position, and the heating-water storage tank 400 may be installed on the circulated-water line 510.
  • the heated-water returning to the main heat exchanger 200 may be heated-water passing through the hot-water supply heat exchanger 300 or heated-water returning from the object 10 being heated.
  • the temperature of the circulated-water supplied to the main heat exchanger may be raised, which results in an improvement in an ability to supply hot-water and an increase in the time during which hot-water at a set temperature or more is supplied.
  • the electronic mixing valve may enable the supply of hot-water at an accurate temperature and may improve the durability of the burner.

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  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Water Supply & Treatment (AREA)
  • Heat-Pump Type And Storage Water Heaters (AREA)
EP19796904.1A 2018-05-04 2019-05-03 Kessel Pending EP3789691A4 (de)

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PCT/KR2019/005331 WO2019212291A1 (ko) 2018-05-04 2019-05-03 보일러

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CN114688600A (zh) * 2020-12-29 2022-07-01 庆东纳碧安株式会社 锅炉***和动作方法
CN116202217A (zh) * 2023-05-05 2023-06-02 上海能誉科技股份有限公司 一种电加热锅炉

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DE1679677A1 (de) * 1966-09-01 1971-12-30 Junkers & Co Waermetauscher zum Bereiten von warmem Brauchwasser
DE19510991A1 (de) * 1994-03-24 1995-09-28 Vaillant Joh Gmbh & Co Gasbeheizter Wasserheizer
KR20040106651A (ko) * 2003-06-11 2004-12-18 주식회사 경동보일러 온수 공급시스템
JP2009281650A (ja) * 2008-05-21 2009-12-03 Daikin Ind Ltd 暖房システム
KR101173746B1 (ko) * 2010-05-28 2012-08-13 주식회사 경동나비엔 소형 열병합 발전 시스템 및 그 제어방법
KR101379766B1 (ko) * 2012-05-03 2014-04-01 주식회사 경동나비엔 난방효율을 향상시킨 난방 및 온수의 동시 사용이 가능한 보일러
JP6128331B2 (ja) * 2014-02-26 2017-05-17 株式会社富士通ゼネラル 温水暖房装置
KR101717097B1 (ko) * 2015-08-28 2017-03-16 주식회사 경동나비엔 열교환기
KR20170113501A (ko) * 2017-09-08 2017-10-12 주식회사 경동나비엔 관체형 열교환기

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114688600A (zh) * 2020-12-29 2022-07-01 庆东纳碧安株式会社 锅炉***和动作方法
CN114688600B (zh) * 2020-12-29 2023-10-20 庆东纳碧安株式会社 锅炉***和动作方法
CN116202217A (zh) * 2023-05-05 2023-06-02 上海能誉科技股份有限公司 一种电加热锅炉

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KR20190127567A (ko) 2019-11-13
KR102645554B1 (ko) 2024-03-11

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