EP3367005A1 - Procédé et dispositif de commande d'un système de chauffage - Google Patents

Procédé et dispositif de commande d'un système de chauffage Download PDF

Info

Publication number: EP3367005A1
Authority: EP; European Patent Office
Prior art keywords: heater; consumer; fluid; flow; circuit
Prior art date: 2017-02-27
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.): Granted

Application number

EP18155484.1A

Other languages

German (de)

English (en)

Other versions

EP3367005B1 (fr

Inventor

Gerald Holtz

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.)

Robert Bosch GmbH

Original Assignee

Robert Bosch GmbH

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.)

2017-02-27

Filing date

2018-02-07

Publication date

2018-08-29

2018-02-07 Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH

2018-08-29 Publication of EP3367005A1 publication Critical patent/EP3367005A1/fr

2022-01-26 Application granted granted Critical

2022-01-26 Publication of EP3367005B1 publication Critical patent/EP3367005B1/fr

Status Active legal-status Critical Current

2038-02-07 Anticipated expiration legal-status Critical

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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
- F24D19/1009—Arrangement or mounting of control or safety devices for water heating systems for central 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
- F24D19/00—Details
- F24D19/10—Arrangement or mounting of control or safety devices
- F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
- F24D19/1009—Arrangement or mounting of control or safety devices for water heating systems for central heating
- F24D19/1015—Arrangement or mounting of control or safety devices for water heating systems for central heating using a valve or 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
- F24D2220/044—Flow sensors

Definitions

the invention relates to a technique for controlling a heating system.
the invention relates to the control of a flow temperature of a heating system with a heater and a consumer circuit.
a heating system For heating a house, a heating system is provided.
the heating system comprises a heater and at least one consumer circuit, wherein a fluid circulates between the heater and the consumer circuits.
the fluid is heated in the heater, flows through a flow into the load circuit, cools down there and flows through a return back to the heater.
the consumer circuit may be associated with a flow temperature, which is fixed preset or can be determined by parameters such as an indoor and an outdoor temperature. In particular, when several consumer circuits are operated on the same heater, the consumer circuit may be associated with a control device which emits a request for the flow temperature of the consumer circuit.
the heater is then controlled so that the highest of the requested flow temperatures of all consumer circuits is set in the flow. If the consumer circuit requires less than this supply temperature, it can mix cooler fluid from the return with the hot fluid provided by the heater.
An object of the invention is to provide an improved technique for controlling such a heating system.
the invention solves this problem by means of the subject matters of the independent claims. Subclaims give preferred embodiments again.
a heating system comprises a heater and a consumer circuit, between which circulates a fluid for heat transfer.
a method of controlling a heating system includes steps of determining a request for a flow temperature of the consumer circuit; and providing the request to the heater. The requirement is only made available if there is a heat demand in the consumer circuit.
the heater may reduce or adjust the heating of the fluid. An energy consumption can be reduced. If the heater is fueled, fuel can be saved. If the heater includes a heat pump, then an efficiency may be increased. Under certain conditions, a return temperature on the heater may be lowered, which allows the heater to operate in a more favorable temperature range.
the heat demand is determined if a volume flow through the consumer circuit is above a predetermined threshold.
this threshold may be a small fraction of a maximum volumetric flow, for example, about 1-2%, or otherwise very small, close to zero, or practically equal to zero.
a control device for the above-mentioned heating system comprises a sampling device for determining the presence of a heat demand in the load circuit; and a processing device configured to provide a request for a predetermined flow temperature to the heater only when there is a heat demand.
the control device can be set up in particular to the method described above in whole or in part.
the control device may comprise a processing device which is designed, for example, as a programmable microcomputer.
the method may be in the form of a computer program product and may include program code means suitable for performing the method when the computer program product runs on the processing device.
the method and the control device or the system described below may correspond in parts or completely, so that features or advantages of the method can be applied to the control device or the system, or vice versa.
the sampling device is configured to determine the volume flow of fluid through the consumer circuit. The determined volume flow can then be compared to a threshold value. In another embodiment, the sampling device is configured to determine the presence of the heat demand when a volume flow of the fluid through the consumer circuit exceeds a predetermined threshold.
the threshold value in both cases is preferably substantially zero, as described in more detail above.
the heating system may comprise a plurality of consumer circuits, wherein each consumer circuit is associated with a device for requesting a predetermined flow temperature.
the heater is preferably adapted to heat the fluid to the highest of the requested flow temperatures. If the requirement for a flow temperature of one of the consumer circuits does not exist, then the heater can be improved in such a way that the requirements of the one or more remaining consumer circuits with respect to the flow temperature are met.
Two consumer circuits can be assigned different flow temperatures.
the heater can lower the flow temperature to the requirement of the other consumer circuit.
One of the consumer circuits may include a mixing device for mixing fluid of the feed with fluid of the return to achieve the requested flow temperature. If the requested flow temperatures of the consumer circuits connected to the heater are similar or even the same, mixing can be dispensed with.
a hydraulic switch may be arranged between the heater and the consumer circuits.
the hydraulic diverter is used for the hydraulic decoupling of the various consumer circuits, in particular if they require different volume flows or different flow temperatures. Under certain circumstances, however, a return flow of heated fluid through the hydraulic switch in the return can be done so that a temperature difference between the flow and the return is reduced. An efficiency of the heater can thereby decrease, especially if it is a condensing boiler or a heat pump.
a heating system comprises a heater and a consumer circuit, between which circulates a fluid for heat transfer, and the control device described above.
FIG. 1 shows a heating system 100, which is preferably adapted for use in a building such as a one- or multi-party house.
the heating system 100 includes a heater 105, which is preferably realized as a heating by the burning of gas or other fuel.
the heater 105 may be based on another principle, such as that of a heat pump.
the heating system 100 further includes one or more consumer circuits 110.
a first load circuit 110 on the left and a second load circuit 110 on the right are shown.
the consumer circuits 110 can deliver heat in different ways.
the first consumer circuit 110 illustrated on the left can include a radiator 115 and the second consumer circuit 110 shown on the right can comprise a floor heating system 125.
similarly constructed consumer circuits 110 may be provided.
the heater 105 is configured to heat and supply a fluid 125, usually water, to a flow 130.
the fluid 125 then flows through the at least one consumer circuit 110 and passes through a return 135 back to the heater 105.
a pump 140 may be provided, which is usually controlled by a control device, the also controls a heat output of the heater 105.
a hydraulic switch 145 is provided in the simplest case as a vertical pipe with a preferably large cross-section and thus small pressure loss between the flow 130 and the return 135.
the hydraulic switch 145 a temperature stratification due to the Density difference of hot and cold fluid 125. In the upper area is warm fluid of the forward 130 and lower in the colder fluid 125 of the return 135th
a compensation takes place in the hydraulic diverter 145 by mixing fluid 125 of the supply line 130 and the return line 135. If the instantaneous volume flow through the heater 105 is greater than is by the consumer circuits 160, the returning fluid 125 from the consumer circuit 160, a subset of the hot fluid 125 of the flow 130 is mixed. If, on the other hand, a larger volume flow is circulated in the consumer circuits 160 than by the heater 105, then the warmer fluid 125 flowing into the consumer circuit 160 is mixed with colder, refluxing fluid 125, so that the flow temperature of the consumer circuits 110 is reduced.
the volume flow flowing through a consumer circuit 110 can be controlled individually, for example by means of a consumer pump 150.
the volume flow can be controlled, for example, as a function of the flow temperature or a return temperature and an internal temperature of the house.
the consumer circuit 110 may include a control device 155 for this purpose.
the control device 155 is preferably configured to provide a request for a flow temperature to the heater 105 or its control depending on a quantity of heat to be delivered.
the control devices 155 are also designed to be integrated with the control of the heater 105.
the consumer circuits 110 may require different temperatures of the fluid 125 in the flow 130.
the flow temperature at the design point eg at an outside temperature of -15 ° C.
the flow temperature of the second consumer circle 110 is with the underfloor heating 120 at 30 ° C to 45 ° C.
the heater 105 is usually controlled to the flow temperature to the maximum of to control the consumer circuits 110 and their control devices 155 requested flow temperatures.
a consumer circuit 110 which requires a lower flow temperature, can be equipped with a mixer 160, which mixes the fluid 125 flowing from the consumer circuit 110 into the return 135 with fluid 125 flowing from the inlet 130 in such a way that the fluid entering the heat exchanger 115, 120 Fluid 125 has a predetermined temperature.
the fluid 125 in the supply line 130 is heated to 50 ° C. by the heater 105.
the pump 140 delivers the fluid 125 to the hydraulic switch 145 and the consumer pumps 150 convey it through the heat exchangers 115 and 120, the mixer 160 mixes the warm fluid 125 in the flow 130 cooler fluid 125, for example 25 ° C, from the floor heating 120th outlet, so that results in a floor temperature of 30 ° C for the underfloor heating 120.
one of the consumer circuits 110 has no heat requirement because the assigned volume flow is zero. For example, all radiators of the first consumer circuit 110 may be closed. Usually, however, a predetermined flow temperature is requested, which is higher than the requested flow temperature of another consumer circuit 110.
the volume flow through the first consumer circuit 110 is zero and by the second consumer circuit 110 at 10 l / min after the mixer 160.
a volume flow of 4 l / min In the exemplified temperatures and volume flows before the mixer 160 of the second load circuit 110, a volume flow of 4 l / min.
the heater 105 is flowed through at 14 l / min, so that fluid 125 flows from the flow 130 through the hydraulic switch 145 in the return 135 and there mixed with fluid 125, which flows back from the underfloor heating 120, for example, 25 ° C.
the return temperature to the heater 105 is thereby approximately 43 ° C.
a request of a consumer circuit 110 for providing a flow temperature is only given if a volume flow through the consumer circuit 110 exceeds a predetermined threshold, in particular if it is above zero.
the heater 105 is preferably configured to provide no heating power and preferably also to deactivate the pump 140 if there is no request to provide a flow temperature. If there are several requirements, the flow temperature is controlled to the maximum of the requested temperatures. If there is only one request, the flow temperature is controlled to this requirement.
the requirement (50 ° C.) of the first consumer circuit 110 is eliminated and only the request (35 ° C.) of the second consumer circuit 110 is present.
the flow temperature is therefore set to 35 ° C.
the mixer 160 of the second consumer circuit 110 adjusts the admixing of fluid 125 flowing back, and volume flows in front of and behind the mixer 160 are the same at about 10 l / min.
the volume flow through the heater 105 is unchanged at 14 l / min, but by the hydraulic switch 145 is significantly smaller, so that the return temperature is only 28 ° C.
a flow sensor 170 may be provided only in the consumer circuits 110 whose predetermined flow temperature is higher than that of another consumer circuit 110.
flow sensors 170 may be used on all radiators 115 equipped consumer circuits 110 may be provided while heating circuits 110 remain unchanged with underfloor heating 120.
the flow sensor 170 may determine a volumetric flow which is then compared to a predetermined threshold.
a flow switch 170 may be provided which merely provides a bivalent signal as to whether or not the volume flow exceeds the threshold.
the threshold value may be mechanically predetermined, for example. In one variant, the threshold value at the flow switch 170 is adjustable.
the suppression of the request of a flow temperature by a load circuit 110 may be made regardless of the type, number and composition of consumer circuits 110. Operation of the heater 105 may thereby be minimized. In particular, a reduction in the efficiency of the heater 105 by raising the return temperature can be avoided.
FIG. 2 shows an exemplary further heating system 100 with two consumer circuits 110 with radiators 115 and two other load circuits 110 with underfloor heating 120.
a flow sensor 170 is provided at each consumer circuit 110 and the provision of a request for a flow temperature of a load circuit 170 is suppressed, if the specific volume flow predetermined threshold, in particular zero, below.
FIG. 3 3 shows a flow chart of a method 300 for controlling a heating system 100.
the method 300 begins in a step 305. Subsequently, a required flow temperature is determined for each existing consumer circuit 110 in a step 310. In addition, for each consumer circuit 110 it is determined in a step 315 whether there is any heating demand at all. This is the case, for example, when the volume flow of fluid 125 through the consumer circuit 110 exceeds a predetermined threshold. In a step 320 performed for each consumer circuit 110, the particular request is provided only if the associated need also exists. The order of steps 310 to 320 may be varied and, for example, it may be waived a required one Flow temperature to determine if the heat demand is zero. The steps 310 to 320 of the individual consumer circuits 110 can be carried out independently of each other in time, also different times.

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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)

EP18155484.1A 2017-02-27 2018-02-07 Système de chauffage Active EP3367005B1 (fr)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
DE102017203133.6A DE102017203133A1 (de)	2017-02-27	2017-02-27	Verfahren und Vorrichtung zur Steuerung eines Heizsystems

Publications (2)

Publication Number	Publication Date
EP3367005A1 true EP3367005A1 (fr)	2018-08-29
EP3367005B1 EP3367005B1 (fr)	2022-01-26

Family

ID=61187154

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP18155484.1A Active EP3367005B1 (fr)	2017-02-27	2018-02-07	Système de chauffage

Country Status (2)

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EP (1)	EP3367005B1 (fr)
DE (1)	DE102017203133A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE102022133190A1 (de) *	2022-12-14	2024-06-20	Vaillant Gmbh	Verfahren zum Betreiben einer Heizungsanlage, Computerprogramm, Regel- und Steuergerät und Heizungsanlagen

Citations (5)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE102011001223A1 (de) *	2011-03-11	2012-09-13	SCHÜCO International KG	Heizungsanlage sowie Betriebsverfahren und Steuereinrichtung für eine Heizungsanlage
DE102012101850A1 (de) *	2012-03-06	2013-09-12	Stefan Jöken	Verfahren zur bedarfsgeführten Regelung eines Wärmeerzeugers in einer Heizungsanlage
DE102012208994A1 (de) *	2012-05-29	2013-12-05	Mattias Grosse	Vorrichtung zum Regeln der Raumtemperatur
EP2775370A2 (fr) *	2013-03-08	2014-09-10	PAW GmbH & Co. KG	Dispositif de chauffage de pièces, comprenant au moins une source de chaleur centrale et comprenant des circuits de chauffage associés aux pièces
DE102013105786A1 (de) *	2013-06-05	2014-12-11	Michael Jeromin	Verfahren zur Regelung einer Zentral-Heizungsanlage

2017
- 2017-02-27 DE DE102017203133.6A patent/DE102017203133A1/de not_active Withdrawn
2018
- 2018-02-07 EP EP18155484.1A patent/EP3367005B1/fr active Active

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE102011001223A1 (de) *	2011-03-11	2012-09-13	SCHÜCO International KG	Heizungsanlage sowie Betriebsverfahren und Steuereinrichtung für eine Heizungsanlage
DE102012101850A1 (de) *	2012-03-06	2013-09-12	Stefan Jöken	Verfahren zur bedarfsgeführten Regelung eines Wärmeerzeugers in einer Heizungsanlage
DE102012208994A1 (de) *	2012-05-29	2013-12-05	Mattias Grosse	Vorrichtung zum Regeln der Raumtemperatur
EP2775370A2 (fr) *	2013-03-08	2014-09-10	PAW GmbH & Co. KG	Dispositif de chauffage de pièces, comprenant au moins une source de chaleur centrale et comprenant des circuits de chauffage associés aux pièces
DE102013105786A1 (de) *	2013-06-05	2014-12-11	Michael Jeromin	Verfahren zur Regelung einer Zentral-Heizungsanlage

Also Published As

Publication number	Publication date
EP3367005B1 (fr)	2022-01-26
DE102017203133A1 (de)	2018-08-30

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