EP4187173A1 - Procédé de fonctionnement d'un système de pompe à chaleur et système de pompe à chaleur - Google Patents

Procédé de fonctionnement d'un système de pompe à chaleur et système de pompe à chaleur Download PDF

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Publication number
EP4187173A1
EP4187173A1 EP22207413.0A EP22207413A EP4187173A1 EP 4187173 A1 EP4187173 A1 EP 4187173A1 EP 22207413 A EP22207413 A EP 22207413A EP 4187173 A1 EP4187173 A1 EP 4187173A1
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EP
European Patent Office
Prior art keywords
heat pump
auxiliary heater
useful fluid
electric auxiliary
power consumption
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
EP22207413.0A
Other languages
German (de)
English (en)
Inventor
Lukas Wurzer
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.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP4187173A1 publication Critical patent/EP4187173A1/fr
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
    • F24H4/00—Fluid heaters characterised by the use of heat pumps
    • 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
    • F24D19/1051—Arrangement or mounting of control or safety devices for water heating systems for domestic hot water
    • F24D19/1054—Arrangement or mounting of control or safety devices for water heating systems for domestic hot water the system uses a heat pump
    • 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
    • F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
    • F24H15/355—Control of heat-generating means in heaters
    • F24H15/37—Control of heat-generating means in heaters of electric heaters
    • 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
    • F24H15/30—Control of fluid heaters characterised by control outputs; characterised by the components to be controlled
    • F24H15/375—Control of heat pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/20—Arrangement or mounting of control or safety devices
    • F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
    • F24H9/2014—Arrangement or mounting of control or safety devices for water heaters using electrical energy supply
    • 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
    • F24D2200/00—Heat sources or energy sources
    • F24D2200/08—Electric heater
    • 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
    • F24D2200/00—Heat sources or energy sources
    • F24D2200/12—Heat pump

Definitions

  • the invention is based on a method for operating a heat pump system, with a heat pump of the heat pump system heating a useful fluid in at least one method step and the useful fluid being heated by an electric auxiliary heater of the heat pump system in at least one method step.
  • reaching a predetermined power consumption level of the heat pump is a condition for triggering a timer function, with the electric auxiliary heater being activated as a function of the timer function.
  • the electric auxiliary heater is provided to additionally heat the useful fluid that has already been preheated by the heat pump and/or to heat the useful fluid at the same time as the heat pump.
  • the electric auxiliary heater is intended to compensate for a lack of heat output from the heat pump.
  • the heat pump system preferably comprises at least one control unit in order to control, in particular to regulate, the heat pump and/or the electric auxiliary heater.
  • control unit puts the electric auxiliary heater into operation when an actual temperature value of the useful fluid falls below a temperature target value of the useful fluid despite operation of the heat pump at the predetermined power consumption level, in particular by more than a tolerance value and in particular by more than a specified blocking time of the electric auxiliary heater.
  • the desired temperature value of the useful fluid can be specified manually, in particular as the output temperature of the useful fluid designed, for example, as service water or drinking water, or by the control unit, for example in the course of a heating control method known per se for heating a room using the useful fluid.
  • the control unit regulates the heat pump to the desired temperature value of the useful fluid.
  • the control unit regulates the electric auxiliary heater to a further desired temperature value of the useful fluid.
  • the temperature setpoint and the further temperature setpoint are particularly preferably at least essentially the same, in particular identical. In this context, “substantially the same” is to be understood as different by less than 5 K, preferably by less than 3 K, particularly preferably by less than 1 K.
  • an actual temperature value of the useful fluid for regulating the heat pump and the electric auxiliary heater is recorded at the same point in the heat pump system, in particular by a single temperature sensor in the heat pump system.
  • the actual temperature value of the useful fluid for controlling the heat pump and the actual temperature value for controlling the electric auxiliary heater are recorded at different points of the heat pump system, in particular by different temperature sensors of the heat pump system.
  • a power consumption of the heat pump can in particular include mechanical, electrical and/or thermal power.
  • the power consumption of the heat pump is adjusted in particular by the control unit, in particular regulated, in order to achieve the desired temperature value of the useful fluid.
  • the specified performance level can be a threshold value or a limit value for the power consumption of the heat pump.
  • the predefined performance level is preferably stored in a memory of the control unit and/or is, by means of a data interface of the control unit, from an external central controller, in particular an external building control system, for example a Smart home system, queried.
  • the predetermined performance level can be a single absolute value, a table, a function of an operating parameter of the heat pump system, a time profile or the like.
  • the predetermined power consumption level is preferably stored in the memory of the control unit at the factory. Alternatively or additionally, the specified power consumption level can be set by an operator of the heat pump.
  • the timer function can be implemented in terms of hardware, in particular as a control module or as a delay element of the control unit, or in terms of software.
  • the control unit compares a time recorded by the timer function with the blocking time of the electric auxiliary heater.
  • the timer function preferably enables control of the electric auxiliary heater after the blocking time has elapsed.
  • the blocking time is preferably more than 5 minutes, preferably more than 10 minutes, particularly preferably more than 15 minutes.
  • the blocking time is preferably less than 180 minutes, preferably less than 120 minutes, particularly preferably less than 60 minutes.
  • the blocking time is preferably dependent on an operating mode of the heat pump system.
  • the blocking time is particularly preferably different in an operating mode of the heat pump system for hot water preparation, in particular for heating drinking water, than in an operating mode of the heat pump system for space heating.
  • the blocking time in the operating mode of the heat pump system for hot water preparation, in particular for heating drinking water is particularly preferably less than 60 minutes, in particular less than 45 minutes, particularly preferably less than or equal to 30 minutes.
  • the blocking time is longer than or equal to 30 minutes in the operating mode of the heat pump system for room heating.
  • the timer function records a period of time when the timer function is triggered.
  • the timer function creates a timestamp when the timer function is triggered.
  • the timer function counts down the blocking time of the electric auxiliary heater when the timer function is triggered.
  • reaching the predetermined power consumption level is a sufficient condition for triggering the timer function. Is particularly preferred reaching the predetermined power consumption level is a necessary condition for triggering the timer function.
  • the timer function can be triggered in at least one operating mode of the heat pump system by at least one further condition, for example if a period of time extrapolated by the control unit until the desired temperature value of the useful fluid is reached by a sole heating output of the heat pump exceeds a threshold value.
  • the method optionally includes, in particular additionally, at least one operating mode in which the electric auxiliary heater can be controlled independently of operation of the heat pump.
  • the power consumption of the heat pump is recorded by a sensor in the heat pump system.
  • the power consumption can be recorded, for example, as an electric current flow through the heat pump, as a voltage drop across the heat pump, as the speed of a compressor or a pump of the heat pump, or the like.
  • the control unit compares the sensed power consumption to the predetermined line consumption level to trigger the timer function.
  • the control unit compares a desired power value for the power consumption determined by the control unit, in particular as a function of a requested heat requirement, with the specified power consumption level in order to trigger the timer function.
  • the heat pump system can advantageously be operated in an energy-efficient and/or cost-efficient manner.
  • starting up the electric auxiliary heater is advantageously independent of short-term temperature fluctuations and/or disturbances in the useful fluid and/or the heat pump.
  • thermalization of components of the heat pump system through which the useful fluid flows can advantageously be achieved without the electric auxiliary heater being put into operation.
  • components of the heat pump system with a relatively high heat capacity, for example heat exchangers can reach the operating temperature be brought without the electric auxiliary heater being activated due to initial temperature fluctuations.
  • the specified power consumption level is a maximum power consumption of the heat pump.
  • the specified power consumption level is particularly preferably an absolute maximum power consumption of the heat pump.
  • no adjustable parameters are available to the control unit with which the control unit can increase a heat output generated when the absolute power consumption maximum is reached by the heat pump.
  • the specified power consumption level is a temporary maximum power consumption, to which a power consumption of the heat pump is limited below the absolute maximum power consumption.
  • the temporary maximum power consumption is used, in particular, to keep the noise generated by the heat pump, for example at night, below a threshold value.
  • the timer function is triggered when the power consumption reaches the maximum power consumption.
  • the timer function is particularly preferably provided to record a period of time in which the power consumption of the heat pump corresponds to the maximum power consumption.
  • the electric auxiliary heater is activated or deactivated as a function of a single actual temperature value, in particular the already mentioned actual temperature value of the useful fluid.
  • the actual temperature value of the useful fluid is particularly preferably recorded downstream of the electric auxiliary heater.
  • the actual temperature value of the useful fluid is recorded as the flow temperature in or on a useful fluid flow of the heat pump.
  • the control unit regulates the electric auxiliary heater, in particular only as a function of a control difference between the actual temperature value and the desired temperature value of the useful fluid.
  • the control unit includes an auxiliary heater regulator for regulating a heating output of the electrical auxiliary heater.
  • the auxiliary heater controller is preferably enabled by the timer function.
  • the auxiliary heater controller is deactivated or set to a standard setting, in particular a zero position, until it is released by the timer function.
  • the auxiliary heater controller preferably processes only the control difference between the actual temperature value and the setpoint temperature value of the useful fluid.
  • the control unit preferably includes a heat pump controller for controlling the heat pump.
  • the heat pump controller preferably processes the actual temperature value of the useful fluid and optionally further operating parameters of the heat pump system, in particular a return temperature of the useful fluid, and/or ambient parameters, in particular an ambient temperature.
  • the electric auxiliary heater is activated or deactivated as a function of a flow temperature, in particular the already mentioned, flow temperature of the useful fluid and independently of a return temperature, in particular the already mentioned return temperature of the useful fluid.
  • regulation of the electric auxiliary heater can advantageously be kept simple.
  • starting up the electrical preheater can advantageously be kept independent of temperature fluctuations.
  • the useful fluid is heated by the electric auxiliary heater in at least one method step of the method downstream of the heat pump.
  • the electric auxiliary heater is preferably arranged at a distance from the heat pump. Alternatively, the electric heater protrudes beyond a heat exchanger of the heat pump.
  • the actual temperature of the useful fluid depending on which the heat pump is controlled, is recorded between the heat pump and the electric auxiliary heater.
  • the actual temperature value of the useful fluid, to which the heat pump and the electric auxiliary heater are regulated is detected downstream of the electric auxiliary heater. Due to the configuration according to the invention, the heat pump can advantageously be given priority over the electric auxiliary heater.
  • the useful fluid reaches the electric auxiliary heater at a temperature advantageously close to the temperature setpoint.
  • a heating output to be supplied by the auxiliary heater can advantageously be kept low.
  • the heat pump and/or the electric auxiliary heater are continuously regulated when they are in an activated state.
  • the auxiliary heater controller comprises in particular a proportional element (P), an integral element (I) and/or a differential element (D).
  • the auxiliary heater controller is designed as a PID controller, as a PD controller, as a PI controller or as a P controller.
  • the auxiliary heater controller only switches the electric auxiliary heater on or off.
  • the heat pump controller includes in particular a proportional element (P), an integral element (I) and/or a differential element (D).
  • the heat pump controller is designed as a PID controller, a PD controller, a PI controller or a P controller. Due to the configuration according to the invention, efficient operation of the heat pump and/or the electric auxiliary heater can advantageously be adjusted quickly and easily. In particular, there is no need for complex parameterization of control stages.
  • a blocking time of the electric auxiliary heater is adjusted in at least one method step.
  • the control unit of the heat pump system provides various operating modes for the heat pump system, from which a user can choose and which differ in particular in the duration of the blocking time.
  • the control unit preferably compares, on a display of the control unit, the energy costs required for reaching the desired temperature value of the useful fluid with different blocking times.
  • the control unit stores the blocking time specified by the user in the control unit's memory.
  • the control unit determines a thermalization time that components of the heat pump system through which the useful fluid flows need to reach an operating temperature.
  • the control unit stores the thermalization time as a blocking time, in particular as a minimum value for the blocking time.
  • the control unit determines the thermalization time as a function of a comparison of the Flow temperature and the return temperature of the useful fluid. Due to the configuration according to the invention, the blocking time can advantageously be flexibly adapted to user preferences and/or external components through which the useful fluid flows, in particular radiators, hot water tanks or the like.
  • the timer function is reset when the heat pump falls below the specified power consumption level.
  • the control unit only resets the timer function after the power consumption level has fallen below when the power consumption differs from the specified power consumption level by more than a tolerance value.
  • the control unit resets the timer function when the heat pump is switched off.
  • the control unit disables the auxiliary heater controller when the control unit resets the timer function.
  • the control unit deactivates the electric auxiliary heater when the control unit resets the timer function.
  • a heat pump system with at least one, in particular the already mentioned, heat pump for heating a, in particular the already mentioned, useful fluid, with at least one, in particular the already mentioned, electric auxiliary heater for heating the useful fluid and with at least one, in particular the already mentioned, proposed control unit for carrying out a method according to the invention.
  • the heat pump can be designed as a compression heat pump or as an absorption heat pump.
  • the heat pump comprises at least one heat exchanger, in particular the one already mentioned, in particular a condenser, for transferring heat to the useful fluid.
  • the heat pump is particularly preferably provided to transfer heat from a heat reservoir to the useful fluid.
  • the heat reservoir is preferably ambient air, alternatively a body of water and/or the ground.
  • the useful fluid is preferably water, in particular heating water, industrial water or drinking water.
  • the useful fluid is air or another heat transfer medium.
  • the heat pump system can, in particular, have a closed fluid circuit in which the Useful fluid is circulated and/or comprise an open fluid circuit in which the useful fluid is conveyed to a dispensing point, for example a faucet or a ventilation opening.
  • the heat pump system includes at least one temperature sensor for detecting the actual temperature of the useful fluid.
  • the temperature sensor is arranged in particular downstream of the heat pump, in particular of the heat exchanger of the heat pump, and preferably downstream of the electric auxiliary heater.
  • the control unit includes at least one electronic control unit.
  • the control electronics include a processor unit and the memory as well as an operating program stored in the memory.
  • control electronics are implemented using an analog logic circuit.
  • control unit is specially programmed, designed and/or equipped to carry out the method according to the invention.
  • the configuration according to the invention makes it possible to provide an advantageously energy-efficient heat pump system with an advantageously simple control system.
  • the method according to the invention and/or the heat pump system according to the invention should/should not be limited to the application and embodiment described above.
  • the method according to the invention and/or the heat pump system according to the invention can/can have a number of individual elements, components and units as well as method steps that differs from a number specified here in order to fulfill a function described herein.
  • values lying within the specified limits should also be considered disclosed and can be used as desired.
  • FIG 1 shows a heat pump system 12.
  • the heat pump system 12 comprises at least one heat pump 14 for heating a useful fluid 20.
  • the heat pump 14 is designed, for example, as a compression heat pump.
  • the heat pump 14 includes in particular at least one heat exchanger 22 for transferring heat from a refrigerant 24 of the heat pump 14 to the useful fluid 20.
  • the heat exchanger 22 is preferably designed as a condenser for liquefying the refrigerant 24.
  • the heat pump 14 preferably includes a further heat exchanger, in particular an evaporator, which is intended to transfer heat from the ambient air to the refrigerant 24 .
  • the heat pump system 12 preferably includes a useful fluid guide 26 for guiding the useful fluid 20.
  • the heat exchanger 22 is arranged in particular in the useful fluid guide 26.
  • the useful fluid guide 26 comprises in particular a feed which is provided for guiding the useful fluid 20 heated by the heat exchanger 22 .
  • the useful fluid guide 26 preferably has an inlet, in particular a return, which is provided for guiding the useful fluid to be heated to the heat exchanger 22 .
  • the useful fluid guide 26 preferably forms a closed fluid circuit, in particular a heating circuit, for the useful fluid 20 with external fluid guide components, for example heating elements, underfloor heating, a buffer storage tank or the like.
  • the heat pump system 12 preferably comprises at least one fluid delivery unit 28, in particular a pump, a compressor or a fan, to a promotion, in particular a circulation, of Use fluid 20 through the use fluid guide 26 therethrough.
  • the fluid delivery unit 28 is preferably arranged upstream of the heat exchanger 22 within the useful fluid guide 26 .
  • the heat pump system 12 comprises at least one electric auxiliary heater 16 for heating the useful fluid 20.
  • the electric auxiliary heater 16 preferably comprises at least one heating wire.
  • the heating wire is preferably arranged within the useful fluid guide 26, in particular for direct contact with the useful fluid 20. Alternatively, the heating wire is let into a line wall of the useful fluid guide 26 or is arranged on an outer wall of the useful fluid guide 26 .
  • the electric auxiliary heater 16 is preferably arranged within the useful fluid guide 26 downstream of the heat exchanger 22 of the heat pump 14 , in particular in the flow of the useful fluid guide 26 .
  • the heat pump system 12 comprises at least one control unit 18.
  • the control unit 18 is preferably provided for regulating the heat pump 14.
  • the control unit 18 is preferably provided for regulating the electric auxiliary heater 16 .
  • the control unit 18 is provided for carrying out a method 10, which is used in particular in figure 2 is described in more detail.
  • the heat pump system 12 preferably includes at least one temperature sensor for controlling the heat pump 14 and/or the electric auxiliary heater 16.
  • the heat pump system 12 includes at least one flow temperature sensor 32.
  • the flow temperature sensor 32 is within the useful fluid guide 26, preferably downstream of the heat exchanger 22 and the electric auxiliary heater 16, in particular in the flow of the useful fluid guide 26 is arranged.
  • the heat pump system 12 includes at least one additional flow temperature sensor 34.
  • the additional flow temperature sensor 34 is located within the useful fluid line 26, preferably downstream of the heat exchanger 22 and upstream of the electric auxiliary heater 16, in particular in the flow of the useful fluid line 26.
  • the heat pump system 12 includes at least one inlet temperature sensor 30.
  • the inlet temperature sensor 30 is within the useful fluid line 26, preferably upstream of the heat exchanger 22 and downstream of the fluid delivery unit 28, in particular in the inlet of the useful fluid line 26.
  • the heat pump system 12 includes additional sensors, for example a Speed sensor 54 for detecting a delivery rate of the fluid delivery unit 28 and/or a power sensor 56 for detecting an electrical output of the electric auxiliary heater, or the like.
  • FIG 2 shows a flowchart of the method 10.
  • the method 10 is provided for the operation of the heat pump system 12.
  • the heat pump 14 of the heat pump system 12 heats the useful fluid 20.
  • the method 10 includes in particular a heat pump controller 40.
  • the heat pump controller 40 is preferably carried out by a heat pump controller of the control unit 18.
  • the control unit 18 regulates the heat pump 14 in order to adjust an actual temperature value of the useful fluid 20 to a temperature setpoint value of the useful fluid 20 .
  • the actual temperature value is preferably detected with the flow temperature sensor 32 and/or the further flow temperature sensor 34 during the heat pump control 40 .
  • control unit 18 also processes a measured value of the inlet temperature sensor 30 and/or the speed sensor 54 during the heat pump regulation 40, in particular according to a method known from the prior art for regulating a heat pump.
  • the heat pump 14 is continuously controlled in an activated state.
  • control unit 18 includes at least one PID controller, which continuously controls the heat pump 14 during the heat pump control 40 .
  • the electric auxiliary heater 16 is preferably deactivated during the heat pump control 40 .
  • useful fluid 20 is heated by electric auxiliary heater 16 of the heat pump system.
  • the method 10 includes at least one auxiliary heater control 48.
  • the auxiliary heater control 48 is preferably carried out by an auxiliary heater regulator of the control unit 18.
  • the control unit 18 regulates the electric auxiliary heater 16 in order to match an actual temperature value, in particular the already mentioned one or a further actual temperature value, of the useful fluid 20 to the temperature setpoint value of the useful fluid 20 .
  • the actual temperature value or the additional actual temperature value is preferably detected with the flow temperature sensor 32 during the auxiliary heater control 48 .
  • the useful fluid 20 is during the auxiliary heater control 48 of the method 10 downstream of the heat pump 14 from the electric auxiliary heater 16 heated.
  • the electric auxiliary heater 16 is continuously controlled in an activated state, in particular during the auxiliary heater control 48 .
  • Heat pump control 40 is preferably activated during auxiliary heater control 48 .
  • a current setting of operating parameters of the heat pump 14 is fixed at the beginning or before the auxiliary heater control 48 .
  • the electric auxiliary heater 16 is activated depending on a timer function. Reaching a predetermined power consumption level of the heat pump 14 is a condition for triggering the timer function.
  • the timer function records a period of time over which the heat pump 14 is operated at the predetermined power consumption level. The timer function is reset when the heat pump 14 falls below the predetermined power consumption level.
  • the specified power consumption level is a maximum power consumption of the heat pump 14.
  • the control unit 18 sets the heat pump 14 in the heat pump controller 40 as a function of the actual temperature of the useful fluid 20 to the maximum specified power consumption level or to a lower power consumption level of the heat pump 14.
  • the electric auxiliary heater 16 is preferably activated, in particular only when the specified power consumption level of the heat pump 14 is not sufficient to bring the actual temperature of the useful fluid 20 to the temperature setpoint within a blocking time of the electric auxiliary heater 16 .
  • a comparison of the blocking time of electrical auxiliary heater 16 with the period of time recorded by the timer function can be carried out digitally, in particular as part of an operating program executed by control unit 18, or analogously, for example by means of a comparator, a delay element at an enable control signal input of electrical auxiliary heater 16 or the like.
  • the heat pump 14 When the heat pump system 12 is started up 36 as part of the method 10, the heat pump 14 is preferably activated. After the heat pump system 12 has been put into operation 36 , the control unit 18 preferably carries out the heat pump regulation 40 . During the heat pump regulation 40 the control unit 18 adapts in particular a current power consumption level of the heat pump 14 in order to adjust the actual temperature value of the useful fluid 20 to the temperature setpoint value of the useful fluid 20 .
  • the procedure 10 includes, in particular, a power consumption check 42. In the power consumption check 42, the control unit 18 preferably checks whether the current power consumption level is equal to the predetermined power consumption level. If the current power consumption level is less than the predefined power consumption level, the control unit 18 preferably carries out a blocking step 52 .
  • the timer function in particular is reset. If the current power consumption level is lower than the predefined power consumption level, the control unit 18 in particular carries out another run through of the heat pump control system 40 . If the current power consumption level of the heat pump 14 is equal to the specified power consumption level, the control unit 18 preferably triggers the timer function in a triggering step 44 of the method 10 .
  • the control unit 18 carries out a blocking time check 38 in particular.
  • the control unit 18 compares in particular the blocking time of the electric auxiliary heater 16 with the time recorded by the timer function. If the time recorded by the timer function is less than the blocking time of the electric auxiliary heater 16, the control unit 18 preferably runs the heat pump control system 40 again. If the time recorded by the timer function is greater than the blocking time of the electrical auxiliary heater 16, the control unit 18 preferably carries out the auxiliary heater regulation 48.
  • the method 10 includes, in particular, a setpoint check 50.
  • the control unit 18 checks in the setpoint check 50 whether the actual temperature of the useful fluid 20 exceeds the temperature setpoint of the useful fluid 20, in particular as an average over several heating cycles of the electric auxiliary heater 16. Alternatively checked the control unit 18 in the setpoint check 50, whether a recorded electrical power of the electric heater 16, in particular in the time average over several heating cycles of the electric heater 16, is less than a predetermined threshold value.
  • the control unit 18 preferably carries out a further run of the auxiliary heater control 48 . If setpoint check 50 is positive, in particular if the actual temperature of useful fluid 20 is greater than the setpoint temperature of useful fluid 20 and/or if the electrical power consumed by electrical auxiliary heater 16 is/is lower than the threshold value, blocking step 52 executed, the electric auxiliary heater 16 deactivated and in particular the heat pump control 40 resumed.
  • the electric auxiliary heater 16 is activated or deactivated depending on the individual actual temperature value, which is detected in particular by means of the flow temperature sensor 32 .
  • the electric auxiliary heater 16 is activated or deactivated as a function of the actual temperature value of the useful fluid 20 embodied as the flow temperature and independently of a return temperature of the useful fluid 20 .
  • the blocking time of the electric auxiliary heater 16 monitored by the timer function is preferably recorded during a test run and stored in a memory of the control unit 18 .
  • the control unit 18 records a period of time and/or speed at which a further actual temperature value of the useful fluid 20 measured with the inlet temperature sensor 30 changes to a tolerance value of the actual temperature value of the useful fluid 20 measured with the inlet temperature sensor 32 or the further flow temperature sensor 34 adjusted.
  • the blocking time of the electrical auxiliary heater 16 is determined in particular as a function of a heat capacity and/or of heat losses in the useful fluid guide 26 and external components connected thereto.
  • the blocking time characterizes in particular a period of time for charging the heat capacity of the useful fluid guide 26 and external components connected to it by means of the heat pump 14 and in particular without using the electric auxiliary heater 16.

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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)
  • Heat-Pump Type And Storage Water Heaters (AREA)
EP22207413.0A 2021-11-29 2022-11-15 Procédé de fonctionnement d'un système de pompe à chaleur et système de pompe à chaleur Pending EP4187173A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102021213447.5A DE102021213447A1 (de) 2021-11-29 2021-11-29 Verfahren zum Betrieb eines Wärmepumpensystems und Wärmepumpensystem

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EP4187173A1 true EP4187173A1 (fr) 2023-05-31

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EP22207413.0A Pending EP4187173A1 (fr) 2021-11-29 2022-11-15 Procédé de fonctionnement d'un système de pompe à chaleur et système de pompe à chaleur

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EP (1) EP4187173A1 (fr)
DE (1) DE102021213447A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
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EP2386801A1 (fr) * 2010-05-10 2011-11-16 Rehau AG + Co Procédé d'activation d'un générateur de chaleur supplémentaire d'une installation de chauffage d'un bâtiment
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