EP3800403B1 - Procédé de fonctionnement d'un dispositif de chauffage, dispositif de chauffage - Google Patents

Procédé de fonctionnement d'un dispositif de chauffage, dispositif de chauffage Download PDF

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Publication number
EP3800403B1
EP3800403B1 EP20198935.7A EP20198935A EP3800403B1 EP 3800403 B1 EP3800403 B1 EP 3800403B1 EP 20198935 A EP20198935 A EP 20198935A EP 3800403 B1 EP3800403 B1 EP 3800403B1
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EP
European Patent Office
Prior art keywords
heating
heat exchanger
heating mode
mode
hxm
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EP20198935.7A
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German (de)
English (en)
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EP3800403A1 (fr
Inventor
Ozan Mert Balci
Yusuf Emre Tiric
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Bosch Termoteknik Isitma ve Klima Sanayi Ticaret AS
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Bosch Termoteknik Isitma ve Klima Sanayi Ticaret AS
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Classifications

    • 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
    • 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
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H15/00—Control of fluid heaters
    • F24H15/20—Control of fluid heaters characterised by control inputs
    • F24H15/212—Temperature of the water
    • F24H15/219—Temperature of the water after heating
    • 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
    • F24D2220/02—Fluid distribution means
    • F24D2220/0235—Three-way-valves
    • 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
    • F24D2220/06—Heat exchangers
    • 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
    • F24D3/087—Tap water heat exchangers specially adapted therefore
    • 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

Definitions

  • a heating device for heating at least one room and for heating drinking water comprising a heat generator, flow and return lines for connection to at least one room radiator, a drinking water heat exchanger, and a switchable connecting line for connecting the drinking water heat exchanger to the flow and return lines.
  • US 2018 073749 A1 discloses a method and a device according to the preamble of claims 1 and 10.
  • the invention is based on a method for operating a heating device, in particular a combination heating device.
  • the method comprises a room heating mode and a domestic hot water mode.
  • heating fluid is heated and conveyed to room heaters connected or connectable to the heating device.
  • the at least one room heater is arranged in a room to be heated.
  • the room heating mode serves to heat at least one room.
  • heating fluid is heated and conveyed to a, in particular in the drinking water heat exchanger integrated in the heating device, whereby drinking water flowing through the drinking water heat exchanger is heated.
  • the method comprises a heat exchanger heating mode, wherein during operation in the heat exchanger heating mode, heating fluid is heated and conveyed to the drinking water heat exchanger, wherein drinking water present in the drinking water heat exchanger is heated, in particular to a standby temperature, wherein operation in the heat exchanger heating mode takes place outside of operation in the domestic hot water mode and from operation in the room heating mode.
  • the invention is characterized in that operation in the heat exchanger heating mode (HXM) takes place as a function of a flow temperature of the heating fluid measured in/on the heat generator (B) and/or a course of the flow temperature, starting when a first temperature limit is undershot and/or ending when a second temperature limit is exceeded.
  • a heating device is understood here to mean, for example, a heating device, a boiler or a heating system for heating at least one room, in particular an apartment or a house, by means of one or more room heaters, and for heating drinking water, in particular a drinking water stream, by means of a drinking water heat exchanger.
  • a heating device is understood to mean a combination heating device that serves both for room heating and for drinking water heating.
  • the heating device comprises a heat generator, flow and return lines and optionally a circulation pump.
  • the circulation pump can be a simple pump that can be switched on and off and has a fixed or predeterminable speed. Alternatively, the circulation pump can also be a variable speed pump whose delivery rate can be modulated between a minimum and a nominal value.
  • Operating a heating device is understood to mean that the heating device is operated in a controlled and/or regulated manner in various operating modes for the purpose of heating the room and heating drinking water.
  • the heating device is operated in room heating mode or in domestic hot water mode.
  • the operation of the heating device is controlled and/or regulated by a control and/or regulating device.
  • a heating fluid is understood to be, for example, heating water (for example water or a mixture of water and additives) which is Heat generator heated and in room heating mode by the circulation pump through
  • the fluid can be circulated in a heating circuit through flow and return lines to the room radiators.
  • the room radiators which are usually not included in the heating device, can release the heat of the heating fluid into the room air and the room in which they are installed.
  • the drinking water heat exchanger is connected by means of a connecting line in such a way that it can be touched by heating fluid on its primary side and/or drinking water can flow around or through it on its secondary side.
  • the drinking water heat exchanger is a plate heat exchanger through which heating fluid and/or drinking water can flow.
  • the hot drinking water to be tapped is heated freshly by the heating fluid in hot drinking water mode according to the flow principle.
  • the heating fluid is heated by the heat generator and circulated in hot drinking water mode by the circulation pump through the flow and return lines, the connecting line and the primary side of the drinking water heat exchanger, while the hot drinking water to be tapped flows on the secondary side.
  • the drinking water heat exchanger can be integrated in the heating device, which means that it is arranged in a fixed spatial and functional assembly in the heating device and is hydraulically connected.
  • the heat exchanger heating mode is used to preheat and keep the drinking water heat exchanger and in particular the drinking water present in the drinking water heat exchanger warm, in particular at a standby temperature, outside of tapping times.
  • the standby temperature can, for example, assume a value in the range 40 °C to 70 °C, in particular in the range 50 °C to 60 °C.
  • warm drinking water is immediately available at an outlet of the drinking water heat exchanger.
  • the heating fluid is heated by the heat generator and circulated in the heat exchanger heating mode by the circulation pump through the flow and return lines, the connecting line and the primary side of the drinking water heat exchanger, while no drinking water flows on the secondary side. Drinking water heat exchangers and the non-flowing drinking water present in the drinking water heat exchanger are heated and kept warm.
  • operation in heat exchanger heating mode occurs from operation in space heating mode means that a preceding operation in space heating mode, in particular an indirect or direct operation, is a prerequisite for the start of subsequent operation in heat exchanger heating mode.
  • a preceding operation in space heating mode in particular an indirect or direct operation
  • the process is also very energy-efficient.
  • the heat required in the heat exchanger heating mode to preheat and keep the drinking water heat exchanger warm, and in particular the drinking water present in the drinking water heat exchanger, is essentially taken directly from the previous operation in the room heating mode.
  • the heat generator, the flow and return lines, the circulation pump and any other components such as valves do not need to be specially heated for operation in the heat exchanger heating mode, as they are taken from the previous operation in the room heating mode. are already warm. There are no heating and/or cooling losses of these components on the heating device side.
  • Operation in heat exchanger heating mode can be followed by operation in room heating mode. This means that there are no heating-up losses and/or cooling-down losses when changing operating modes.
  • the heat generator, the flow and return lines, the circulation pump and any other components such as valves do not need to be specially heated for operation in room heating mode, as they are already warm from the previous operation in heat exchanger heating mode.
  • An advantageous embodiment of the method is characterized in that operation in the heat exchanger heating mode at least temporarily overlaps or interrupts operation in the room heating mode.
  • the fact that two operating modes overlap means in particular that the modes take place at least in periods of time at the same time, that operation in a further mode is added to an already active operating mode.
  • This has the advantage that the already active operating mode and a supply task assigned to it (for example supplying the room heaters with heat) do not have to be interrupted.
  • the fact that one operation interrupts the other operation means in particular that operation in the two operating modes does not take place simultaneously, but that operation in one operating mode is ended in favor of the other, and/or that operation in the other operating mode is ended in favor of one, i.e. they follow one another in time and are separated from one another in time.
  • the two operating modes can alternate intermittently.
  • the respective supply task (supplying the room heaters with heat or supplying the drinking water heat exchanger with heat) can be fulfilled without restriction.
  • the method according to the invention is characterized in that the operation in the heat exchanger heating mode is dependent on a temperature and/or a profile of the flow temperature one in/on
  • a temperature at the drinking water heat exchanger or at the heat generator here means a temperature of a heat exchanger wall or heat generator wall, but can also mean a wall temperature of a drinking water or heating fluid line at the outlet or near the outlet of the drinking water heat exchanger or heat generator.
  • the temperature limits correlate with the standby temperature to which the drinking water heat exchanger is preheated.
  • the first temperature limit represents a minimum temperature to be maintained, the second temperature limit represents a maximum temperature to be maintained.
  • a temperature curve here means observing the values of a temperature curve and/or an increase in the temperature curve over time. Operation in heat exchanger heating mode therefore takes place depending on requirements and in advance.
  • a further advantageous embodiment of the method is characterized in that the operation in the heat exchanger heating mode takes place depending on an operating time.
  • this operating time can be an operating time that has elapsed since the end of the most recent operation in the heat exchanger heating mode.
  • this operating time can be an operating time that has elapsed since the start of a currently active operation in the room heating mode.
  • this operating time can be an operating time that has elapsed since the end of the most recent operation in the domestic hot water mode. For example, it is checked whether the operating time has already reached or exceeded a predeterminable minimum operating time. This means that the operation in the heat exchanger heating mode takes place depending on demand.
  • a further advantageous embodiment of the method is characterized in that an adjusting means and/or a switching means directing a heating fluid flow is set and/or switched in order to set and/or switch the heat exchanger heating mode.
  • the drinking water heat exchanger is connected by means of an adjustable and/or switchable connecting line so that it can be touched by heating fluid on its primary side and/or drinking water on its secondary side, in particular can be flowed around or through.
  • the adjusting means and/or the switching means turn the simple connecting line into the adjustable and/or switchable connecting line.
  • the drinking water heat exchanger is a plate heat exchanger through which heating fluid and/or drinking water can flow. When hot drinking water is required, the hot drinking water to be tapped is heated freshly by the heating fluid in hot drinking water mode according to the flow principle.
  • the heating fluid is heated by the heat generator and circulated in hot drinking water mode by the circulation pump through the flow and return lines, the connecting line and the primary side of the drinking water heat exchanger, while the hot drinking water to be tapped flows on the secondary side.
  • the drinking water heat exchanger can be integrated in the heating device, which means that it is arranged in a fixed spatial and functional connection in the heating device and is hydraulically connected.
  • the adjustable and/or switchable connecting line comprises actuating means and/or switching means, in particular a three-way valve, for diverting the heating fluid flow between the heating circuit with space heaters and/or the drinking water heat exchanger.
  • a further advantageous embodiment of the method is characterized in that during operation in heat exchanger heating mode, at least a partial amount of the heated heating fluid, i.e. a partial flow of the entire heated heating fluid flow, is conveyed to the drinking water heat exchanger. Any remaining amount of the entire heating fluid flow is conveyed to the heating circuit with the room radiators.
  • the heating fluid is heated by the heat generator and circulated by the circulation pump through the flow and return lines and at least partially through the connecting line and the primary side of the drinking water heat exchanger, while the domestic hot water is the secondary side does not flow but is preheated.
  • An adjusting device is understood here as a means for dividing the heating fluid flow between the heating circuit with room radiators on the one hand and the drinking water heat exchanger on the other, whereby the heating fluid is divided in variable proportions between the two heat consumers (room radiators, drinking water heat exchanger).
  • a switching device is understood here as a means by which the heating fluid flow is directed either into the heating circuit with the room radiators or to the drinking water heat exchanger.
  • a further advantageous embodiment of the method is characterized in that the operation in heat exchanger heating mode is short-term, in particular with a duration, which can be specified, in the range of 0.1...5 minutes. This is the duration during which the heating fluid flows through the drinking water heat exchanger to preheat and keep it warm. This short duration is sufficient because the drinking water rests on the secondary side. The system can then switch back to room heating mode.
  • the duration can be used to adapt the method to individual conditions of the heating device, such as heat generator output, line lengths, size and/or user behavior of the drinking water heat exchanger.
  • a further advantageous embodiment of the method is characterized in that the operation in the heat exchanger heating mode is repeated, in particular with a repetition frequency in the range 0.05...1 per minute.
  • These successive operations can be used so that the drinking water heat exchanger is always at standby temperature and thus ready for hot drinking water tapping. Alternatively or additionally, these successive operations can be used so that the heating to standby temperature takes place gradually from operation to operation; this way, for example, a longer interruption of the room heating mode can be avoided.
  • the method can be adapted to individual conditions of the heating device such as heat generator output, line lengths, size of the drinking water heat exchanger and/or user behavior.
  • the setting and/or switching of the actuating means and/or switching means, and/or a size of the partial quantity of the heating fluid conveyed to the drinking water heat exchanger in the heat exchanger heating mode, and/or the duration of operation in the heat exchanger heating mode, and/or the repetition frequency of successive operations in the heat exchanger heating mode are determined as a function of the temperature and/or a temperature profile, in particular a drinking water temperature measured in/on the drinking water heat exchanger and/or a heating fluid temperature measured in/on the heat generator.
  • the minimum flow rate of the circulation pump or the switched off circulation pump have the advantage that when the control/switching device is set or switched on, no damaging water hammer can occur in the pipes of the heating device.
  • the minimum heat output of the heat generator that is not switched off has the advantage that the heat generator, the flow and return pipes, the circulation pump and any other components do not cool down; on the other hand, the heat generator or the heating fluid present in the heat generator, which switched off circulation pump, does not overheat and does not damage the heating device.
  • the minimum heat output can, for example, be in the range 10% to 30% of the nominal heat output of the heat generator.
  • the invention also relates to a heating device for heating at least one room and heating drinking water, in particular a drinking water stream.
  • the heating device comprises a heat generator, in particular one whose heat output can be modulated, for heating a heating fluid; at least one flow line and one return line for connecting the heat generator to at least one room heater in a way that conducts heating fluid; a drinking water heat exchanger and an adjustable and/or switchable connecting line, wherein the drinking water heat exchanger is connected to the flow line and the return line in a way that conducts heating fluid by means of the connecting line; and a control and/or regulating device which is provided to adjust and/or switch the connecting line and to reduce and/or stop a delivery of heating fluid through the flow line and the return line to the space heater for a heat exchanger heating mode and to increase and/or release a delivery of heating fluid through the connecting line to the drinking water heat exchanger, characterized in that the control and/or regulating device is designed to carry out a method according to one of claims 1 to 9.
  • the adjustable and/or switchable connecting line comprises at least one stepwise or continuously adjustable or switchable adjusting means and/or switching means, in particular a three-way valve, wherein the adjusting/switching means is provided to direct the heating fluid in variable or fixed proportions to the drinking water heat exchanger and/or to the space heater.
  • a step-switchable switching device can realize two end positions and optionally one or more further intermediate positions. Accordingly, the heating fluid can be directed exclusively to the room heater in a first end position, or exclusively to the Drinking water heat exchanger, or in an optional further intermediate position for a fixed division into two partial flows to the room radiator and drinking water heat exchanger.
  • a continuously adjustable actuator can realize any intermediate position between the two end positions and divide the heating fluid into two variable partial flows to the room radiator and the drinking water heat exchanger.
  • the invention also relates to a computer program which is configured to carry out the steps of at least one of the methods described above.
  • the invention also relates to a machine-readable storage medium on which the computer program is stored.
  • the invention also relates to an electronic control and/or regulating device which is designed to carry out the steps of at least one of the methods described above.
  • FIG. 1 shows a schematic structure of an embodiment of the heating device 100.
  • the heating device 100 serves to heat at least one room and to heat drinking water, in particular a drinking water stream.
  • the heating device 100 comprises a heat generator B, the heat output of which can be modulated, for heating a heating fluid.
  • the heat generator B comprises a fuel-fired burner.
  • the heating fluid can circulate through the heat generator B, a flow line 102 and a return line 104.
  • the flow and return lines 102, 104 are connected or can be connected to at least one room heater 202 by means of connecting elements 106 in a way that conducts heating fluid.
  • the heating fluid circulation from the heat generator B via the flow and return lines 102, 104 to the at least one room heater 202 represents, at least in sections, a heating circuit 200 external to the heating device.
  • heated heating fluid is thus conveyed to at least one room heater 202.
  • the heating device 100 comprises a drinking water heat exchanger 108, on the secondary side of which drinking water can be heated.
  • the drinking water heat exchanger 108 is connected or can be connected to a drinking water source 300 and to at least one drinking water tap 302 by means of connecting elements 110.
  • the drinking water heat exchanger 108 can be heated by heating fluid.
  • the drinking water heat exchanger 108 is connected to the flow line 102 and the return line 104 by means of an adjustable and/or switchable connecting line 112 in a heating fluid-conducting manner. In the drinking water hot water mode DWM, heated heating fluid is thus conveyed to the drinking water heat exchanger 108, whereby drinking water flowing through the drinking water heat exchanger 108 is heated.
  • the connecting line 112, and with it the drinking water heat exchanger 108 can be switched into a heating circuit 114 inside the heating device by means of an actuating or switching means V.
  • the heating fluid circulates, as described above, in the heating circuit 200 external to the heating device to the at least one space heater 202.
  • the heating fluid circulates in the heating circuit 114 internal to the heating device from the heat generator B via the flow and return lines 102, 104 and the connecting line 112 to the drinking water heat exchanger 108.
  • the heating device 100 comprises a control and/or regulating device 116, which is intended to adjust and/or switch at least the connecting line 112, in particular to adjust and/or switch at least the actuating or switching means V of the connecting line 112.
  • the control/regulating device 116 also serves to control or regulate the heat generator B and the circulation pump P, as well as to receive a temperature signal (signal/current/voltage lines are shown in dashed lines) from a connected temperature sensor 118a.
  • the temperature sensor 118a is arranged on the flow line 102 on an outlet side of the heat generator B and measures a flow temperature of the heat generator B.
  • a temperature sensor 118b, 118c can be arranged on an outlet side of the drinking water heat exchanger 108, for example on a drinking water outlet side and/or a heating fluid return side of the drinking water heat exchanger 108, and measures the outlet temperature of the drinking water and/or the return temperature of the heating fluid.
  • the heat exchanger heating mode HXM which takes place outside of operation in the hot water mode DWM and from operation in the room heating mode CHM, ensures that both the drinking water heat exchanger 108 and the drinking water in it always at a standby temperature, as desired or expected by a user, or are regularly heated to standby temperature.
  • the heat exchanger heating mode HXM takes place from the room heating mode CHM, i.e. under conditions where at least the heat generator B, the flow line 102 and the heating fluid in the flow line 102, as well as the actuating/switching means V, if it is arranged in the flow line 102, are already heated. Operation in the heat exchanger heating mode HXM is therefore particularly energy efficient, since the aforementioned components of the heating device 100 do not have to be specially heated for this purpose, but are already at operating temperature.
  • Operation in heat exchanger heating mode HXM or switching to heat exchanger heating mode HXM is dependent on a temperature and/or a temperature profile dependent on a flow temperature of the heating fluid measured downstream of heat generator B using temperature sensor 118a.
  • the switching begins when a first, lower temperature limit is undershot and ends when a second, upper temperature limit is overshot.
  • the first temperature limit is slightly below the standby temperature.
  • the second temperature limit is slightly above the standby temperature.
  • the deviations are advantageously in a range of 1...5 °C.
  • the control/regulating device 116 is provided to reduce and/or stop a conveyance of heating fluid through the flow line 102 and the return line 104 to the space heater 202 for a heat exchanger heating mode HXM and to increase and/or release a conveyance of heating fluid through the connecting line 112 to the drinking water heat exchanger 108.
  • End positions of the actuating or switching means V at least one intermediate position is also conceivable, at least in the heat exchanger heating mode HXM, in which the heating fluid is divided into two partial quantities by means of the actuating/switching means V, of which a first partial quantity flows through the connecting line 112 to the drinking water heat exchanger 108 and a second partial quantity flows to at least one space heater 202.
  • the system boundary of the heating device 100 is indicated by a dotted line.
  • the room heater 202 and connected supply lines 204 and discharge lines 206 for connecting to the flow and return lines 102, 104 are not part of the heating device 100 in the present case.
  • Figure 2 shows a temporal sequence of an example behavior of heat generator B, circulation pump P and actuating/switching means V over time t when changing over or switching the operation from the room heating mode CHM to the heat exchanger heating mode HXM and back again to the room heating mode CHM.
  • the changeover or switching of the operation to the heat exchanger heating mode HXM is prepared, starting in the room heating mode CHM, by modulating the heat output of the heat generator B, for example starting from a nominal heat output B-nom to a minimum heat output B-min that is different from zero.
  • This is followed by switching off the previously switched on circulation pump P from a pump switching state P-1 to a pump switching state P-0. In the pump switching state P-0, the circulation pump P does not pump any heating fluid.
  • the actuating/switching means V sets or switches from a first end position V-E1 to a second end position V-E2 (solid line).
  • the actuating/switching means V sets or switches from a first end position V-E1 to an intermediate position VZ (dashed line).
  • the heating fluid flows via flow and return lines 102, 104 to the at least one room heater 202 (room heating mode CHM). After switching, the heating fluid flows at least partially to the drinking water heat exchanger 108 (heat exchanger heating mode HXM).
  • the circulation pump P is switched on again (pump switching state P-1).
  • the heating device 100 changes or switches from the room heating mode CHM to the heat exchanger heating mode HXM.
  • the pump switching state here represents a switched and/or regulated delivery rate and/or speed of the circulation pump P.
  • the pump switching state P-1 can, for example, represent a nominal delivery rate and/or speed. Alternatively, the pump switching state P-1 can also represent a higher delivery rate and/or speed that differs from the pump switching state P-0.
  • the pump switching state P-0 can, for example, represent a switched off circulation pump with no delivery rate (delivery rate and speed equal to zero). Alternatively, the pump switching state P-0 can also represent a minimum delivery rate and/or speed that differs from zero.
  • the circulation pump P can be a simple pump that can be switched on and off and has a fixed or preset speed.
  • the circulation pump P can also be a variable speed pump whose flow rate can be modulated between a minimum and a nominal value.
  • control/switching means V switches to an intermediate position VZ, a first partial amount of the entire heating fluid flow flows to the drinking water heat exchanger 108, a second partial amount flows to the room heater 202, this variant is designated here as Alt-Z.
  • operation in the heat exchanger heating mode HXM at least temporarily overrides operation in the room heating mode CHM, since operation in the Room heating mode CHM continues to run in the background, while operation in heat exchanger heating mode HXM takes place in the foreground. Operations in heat exchanger heating mode HXM and room heating mode CHM take place simultaneously, at least temporarily.
  • Operation of the heating device 100 in the heat exchanger heating mode HXM excludes operation in the domestic hot water mode DWM.
  • operation in the domestic hot water mode DWM also excludes operation in the heat exchanger heating mode HXM.
  • Operation in heat exchanger heating mode HXM can generally be short-term and ends, for example, after a period of time, which can be specified in particular, in the range of 0.1...5 minutes. This period can be sufficient to heat the drinking water heat exchanger 108 and the drinking water in it to standby temperature.
  • the period can be fixed at the factory. Alternatively, the period can also be specified by a heating installer or user of the heating device 100 via the control and/or regulating device 116.
  • Operation in heat exchanger heating mode HXM can also end if a temperature measured in/on the drinking water heat exchanger 108 and/or in/on the heat generator B reaches or exceeds a (second) temperature limit value.
  • the previously switched on circulation pump P switches from a pump switching state P-1 to a pump switching state P-0.
  • the circulation pump P does not pump any heating fluid.
  • the actuating/switching means V switches from a second end position V-E2 (solid line) or from an intermediate position VZ (dashed line) to a first end position V-E1.
  • the heating fluid flows at least partially to the Drinking water heat exchanger 108 (heat exchanger heating mode HXM). After the changeover/switching, the entire heating fluid flow flows to the at least one room heater 202 (room heating mode CHM). After the changeover or switching, the circulation pump P is switched on again (pump switching state P-1). By changing or switching the actuating/switching means V, the heating device 100 switches from the heat exchanger heating mode HXM to the room heating mode CHM.
  • FIG. 3 shows a schematic process sequence according to the invention. The following steps are implemented by the control/regulating device 116.
  • a first step S1 it is checked whether the room heating mode CHM is currently active.
  • the heat generator B supplies a heat output, for example a nominal heat output B-nom, alternatively also a heat output adapted to a current requirement that deviates from the nominal heat output B-nom, and heats heating fluid; furthermore, the circulation pump P is switched on and delivers heating fluid in a pump switching state P-1; the actuating/switching means V is also in a first end position V-E1 and circulates the heating fluid through the heat generator B and the flow and return lines 102, 104 to the at least one room heater 202.
  • a second step S2 checks whether a current operating time has already reached or exceeded a predeterminable minimum operating time. If the current operating time reaches or exceeds the predeterminable minimum operating time, the heat exchanger heating mode HXM can be enabled.
  • This current operating time can, for example, be an operating time that has elapsed since the start or end of the most recent operation in the heat exchanger heating mode HXM. Alternatively, this current operating time can be an operating time that has elapsed since the start of the currently active operation in the room heating mode CHM. Alternatively, this current operating time can be an operating time that has elapsed since the end of the most recent operation in the domestic hot water mode DWM. This check ensures that the heating device 100 does not switch to the heat exchanger heating mode too often. HXM switches and not too many clocking in/outs occur within a time unit, which could overload the components involved.
  • step S2 If (as long as) during the check after step S2 the current operating time does not (yet) reach or exceed the predeterminable minimum operating time, the heat exchanger heating mode HXM is not enabled. Instead, the process sequence jumps to a twelfth step S12 (see description of the process details below) and the heating device 100 is operated in the room heating mode CHM as required. If the heating device 100 continues to be operated or is operated again in the room heating mode CHM, the check after step S1 follows with any further steps according to the method described here.
  • a third step S3 checks whether the temperature, in particular the current temperature, measured in particular by means of one of the temperature sensors 118a, 118b, 118c, has reached or fallen below a first temperature limit value. If the current temperature reaches or falls below the first temperature limit value, the heat exchanger heating mode HXM can be enabled.
  • the temperature can be a drinking water temperature or heating fluid temperature measured in or on the drinking water heat exchanger, and/or a heating fluid temperature measured in or on the heat generator, in particular a temperature measured at the respective water or fluid outlet.
  • step S3 If (as long as) the current temperature does not (yet) reach or fall below the first temperature limit value during the check according to step S3, the heat exchanger heating mode HXM is not enabled. Instead, the process flow jumps to the twelfth step S12 (see description of the process details below) and the heating device 100 is operated in the room heating mode CHM as required. If the heating device 100 continues to be operated or is operated again in the room heating mode CHM, the check according to step S1 follows with any further steps according to the method described here.
  • step S4 the heat output of the heat generator B is controlled and/or regulated to a minimum value B-min that is different from zero. The heat generator B therefore remains switched on.
  • a subsequent fifth step S5 the circulation pump P is switched off in a pump switching state P-0.
  • the circulation pump P does not pump any heating fluid.
  • the actuating/switching means V is switched to a second end position V-E2 or to an intermediate position V-Z.
  • the heating fluid can at least partially flow to the drinking water heat exchanger 108 (heat exchanger heating mode HXM).
  • a subsequent seventh step S7 the circulation pump P is switched to a pump switching state P-1.
  • the circulation pump P pumps heating fluid so that the heating fluid circulates through the heat generator B and the flow and return lines 102, 104 at least partially to the connecting line 112 and to the drinking water heat exchanger 108.
  • a subsequent eighth step S8 it is checked whether the temperature, in particular the measured temperature, has reached or exceeded a second temperature limit value.
  • the temperature can be a drinking water temperature or heating fluid temperature measured in or on the drinking water heat exchanger, and/or a heating fluid temperature measured in or on the heat generator, in particular a temperature measured at the respective water or fluid outlet.
  • step S8 If the temperature does not reach or exceed the second temperature limit value during the test according to step S8, the method returns to step S7.
  • step S9 follows.
  • the circulation pump P is switched off in a pump switching state P-0.
  • the circulation pump P does not pump any heating fluid.
  • the actuating/switching means V is switched to a first end position V-E1. After the switchover/switching, the heating fluid can flow exclusively to the at least one space heater 202.
  • the circulation pump P is switched to a pump switching state P-1.
  • the circulation pump P pumps heating fluid so that the heating fluid circulates through the heat generator B and the flow and return lines 102, 104 to the at least one space heater 202.
  • the heating device 100 is operated in the room heating mode CHM as required, in particular the heat output of the heat generator B is modulated according to an existing room heating requirement, for example to a nominal heat output B-nom.
  • the heating device 100 switches off. In particular, the heat generator B and the circulation pump P are switched off.
  • step S1 follows with possible further steps according to the method described here.

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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)

Claims (13)

  1. Procédé pour faire fonctionner un système de chauffage (100) comprenant un générateur de chaleur (B), avec un mode de chauffage de pièce (CHM), un mode d'eau chaude sanitaire (DWM) et un mode de chauffage par échangeur de chaleur (HXM),
    • lors d'un fonctionnement en mode de chauffage de pièce (CHM), un fluide de chauffage étant chauffé par le générateur de chaleur (B) et transporté vers des radiateurs de pièce (202) reliés ou pouvant être reliés au système de chauffage (100), et/ou
    • lors d'un fonctionnement en mode d'eau chaude sanitaire (DWM), un fluide de chauffage étant chauffé et transporté vers un échangeur de chaleur d'eau sanitaire (108), en particulier intégré dans le système de chauffage (100), de l'eau sanitaire qui traverse l'échangeur de chaleur d'eau sanitaire (108) étant chauffée,
    • lors d'un fonctionnement en mode de chauffage par échangeur de chaleur (HXM), un fluide de chauffage étant chauffé et transporté vers l'échangeur de chaleur d'eau sanitaire (108), l'eau sanitaire présente dans l'échangeur de chaleur d'eau sanitaire (108) étant chauffée, en particulier à une température d'attente,
    • le fonctionnement en mode de chauffage par échangeur de chaleur (HXM) s'effectuant temporellement en dehors du fonctionnement en mode d'eau chaude sanitaire (DWM) et à partir du fonctionnement en mode de chauffage de pièce (CHM),
    caractérisé en ce que le fonctionnement en mode de chauffage par échangeur de chaleur (HXM) s'effectue en fonction d'une température de départ du fluide de chauffage mesurée dans/sur le générateur de chaleur (B) et/ou d'une évolution de la température de départ, en commençant en cas de franchissement vers le bas d'une première valeur limite de température et/ou se terminant en cas de dépassement d'une deuxième valeur limite de température.
  2. Procédé selon la revendication 1,
    caractérisé en ce que le fonctionnement en mode de chauffage par échangeur de chaleur (HXM) chevauche ou interrompt au moins temporairement le fonctionnement en mode de chauffage de pièce (CHM).
  3. Procédé selon l'une des revendications précédentes, le fonctionnement en mode de chauffage par échangeur de chaleur (HXM) s'effectuant en fonction d'une durée de fonctionnement, notamment d'une durée de fonctionnement écoulée depuis le début d'un fonctionnement actuellement actif en mode de chauffage de pièce (CHM).
  4. Procédé selon l'une des revendications précédentes, un moyen de positionnement (V) qui dirige un flux de fluide de chauffage et/ou un moyen de commutation (V) étant positionné et/ou commuté pour un réglage et/ou une mise en marche du mode de chauffage par échangeur de chaleur (HXM).
  5. Procédé selon l'une des revendications précédentes, lors du fonctionnement en mode de chauffage par échangeur de chaleur (HXM), au moins une quantité partielle du fluide de chauffage chauffé étant transportée vers l'échangeur de chaleur d'eau sanitaire (108).
  6. Procédé selon l'une des revendications précédentes, le fonctionnement en mode de chauffage par échangeur de chaleur (HXM) étant de courte durée, notamment d'une durée, en particulier prédéterminable, dans l'intervalle de 0,1 à 5 minutes.
  7. Procédé selon l'une des revendications précédentes, le fonctionnement en mode de chauffage par échangeur de chaleur (HXM) s'effectuant de manière répétée, notamment à une fréquence de répétition comprise dans la plage de 0,05 à 1 par minute.
  8. Procédé selon l'une des revendications 3 à 6,
    • le positionnement et/ou la commutation du moyen de positionnement (V) et/ou du moyen de commutation (V) et/ou
    • une grandeur de la quantité partielle du fluide de chauffage transporté vers l'échangeur de chaleur d'eau sanitaire (108) dans le mode de chauffage par échangeur de chaleur (HXM) et/ou
    • la durée du fonctionnement en mode de chauffage par échangeur de chaleur (HXM) et/ou
    • la fréquence de répétition des fonctionnements successifs en mode de chauffage par échangeur de chaleur (HXM)
    étant déterminé(e)s en fonction d'une température et/ou d'une évolution de la température, notamment d'une température mesurée dans/sur l'échangeur de chaleur d'eau sanitaire (108) et/ou dans/sur un générateur de chaleur (B) .
  9. Procédé selon l'une des revendications précédentes, avant et/ou pendant le positionnement et/ou la commutation du moyen de positionnement (V) et/ou du moyen de commutation (V) en vue de repositionner et/ou de permuter entre le mode de chauffage de pièce (CHM) et le mode de chauffage par échangeur de chaleur (HXM) et diriger le flux de fluide de chauffage vers l'échangeur de chaleur d'eau sanitaire (108) et/ou vers le radiateur de pièce (202),
    • un générateur de chaleur (B), notamment dont la puissance calorifique est modulable, étant commandé et/ou régulé pour chauffer le fluide de chauffage à une puissance calorifique minimale (B-min), et/ou
    • une pompe de circulation (P) destinée au transport du fluide de chauffage étant commandée et/ou régulée à un débit minimal, notamment mise hors circuit, et/ou pendant le fonctionnement en mode de chauffage par échangeur de chaleur (HXM), la pompe de circulation (P) destinée au transport du fluide de chauffage étant commandée et/ou régulée, notamment mise en circuit, pour transporter le fluide de chauffage à un débit accru.
  10. Système de chauffage (100) destiné au chauffage d'au moins une pièce et au chauffage d'eau sanitaire, comprenant
    • un générateur de chaleur (B), notamment dont la puissance calorifique est modulable, destiné à chauffer un fluide de chauffage,
    • au moins une conduite de départ (102) et une conduite de retour (104) destinées à relier en conduisant du fluide de chauffage le générateur de chaleur (B) à au moins un radiateur de pièce (202),
    • un échangeur de chaleur d'eau sanitaire (108) et une conduite de liaison (112) positionnable et/ou commutable, l'échangeur de chaleur d'eau sanitaire (108) étant relié en conduisant du fluide de chauffage au moyen de la conduite de liaison (112) à la conduite d'aller (102) et à la conduite de retour (104),
    • un dispositif de commande et/ou de régulation (116), qui est prévu pour positionner et/ou commuter la conduite de liaison (112) et, pour un mode de chauffage par échangeur de chaleur (HXM), réduire et/ou arrêter un transport de fluide de chauffage à travers la conduite de départ (102) et la conduite de retour (104) vers le radiateur de pièce (202) ainsi que pour augmenter et/ou libérer un transport de fluide de chauffage à travers la conduite de liaison (112) vers l'échangeur de chaleur d'eau sanitaire (108), caractérisé en ce que le dispositif de commande et/ou de régulation est configuré pour mettre en œuvre un procédé selon l'une des revendications 1 à 9.
  11. Programme informatique, comprenant des instructions qui ont pour effet que le système selon la revendication 10 exécute les étapes du procédé selon l'une des revendications 1 à 9.
  12. Support de stockage lisible par machine, sur lequel est enregistré le programme informatique selon la revendication 11.
  13. Dispositif électronique de commande et/ou de régulation, qui est conçu de telle sorte qu'un système de chauffage (100), destiné au chauffage d'au moins une pièce et à chauffer de l'eau sanitaire et comprenant
    • un générateur de chaleur (B), notamment dont la puissance calorifique est modulable, destiné à chauffer un fluide de chauffage,
    • au moins une conduite de départ (102) et une conduite de retour (104) destinées à relier en conduisant du fluide de chauffage le générateur de chaleur (B) à au moins un radiateur de pièce (202),
    • un échangeur de chaleur d'eau sanitaire (108) et une conduite de liaison (112) positionnable et/ou commutable, l'échangeur de chaleur d'eau sanitaire (108) étant relié en conduisant du fluide de chauffage au moyen de la conduite de liaison (112) à la conduite d'aller (102) et à la conduite de retour (104), exécute toutes les étapes du procédé selon l'une des revendications 1 à 9.
EP20198935.7A 2019-10-01 2020-09-29 Procédé de fonctionnement d'un dispositif de chauffage, dispositif de chauffage Active EP3800403B1 (fr)

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Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0886110B1 (fr) * 1997-06-19 2004-08-11 Robert Bosch Gmbh Méthode pour préparer l'eau sanitaire dans un système mixte

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US10914475B2 (en) * 2016-09-14 2021-02-09 Lochinvar, Llc Methods and system for controlling a combination boiler
US10612795B2 (en) * 2016-09-14 2020-04-07 Lochinvar, Llc Methods and system for demand-based control of a combination boiler
JP6830339B2 (ja) * 2016-11-01 2021-02-17 リンナイ株式会社 熱源装置

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0886110B1 (fr) * 1997-06-19 2004-08-11 Robert Bosch Gmbh Méthode pour préparer l'eau sanitaire dans un système mixte

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