EP4305357A1 - Verfahren, computerprogramm-produkt und system zum überwachen einer wärmepumpe - Google Patents
Verfahren, computerprogramm-produkt und system zum überwachen einer wärmepumpeInfo
- Publication number
- EP4305357A1 EP4305357A1 EP22708930.7A EP22708930A EP4305357A1 EP 4305357 A1 EP4305357 A1 EP 4305357A1 EP 22708930 A EP22708930 A EP 22708930A EP 4305357 A1 EP4305357 A1 EP 4305357A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- heat pump
- operating
- reference data
- interval
- pause
- 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
Links
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/32—Responding to malfunctions or emergencies
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/32—Responding to malfunctions or emergencies
- F24F11/38—Failure diagnosis
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
Definitions
- a heat pump is a machine that uses technical work to absorb thermal energy from a reservoir at a lower temperature and - together with the drive energy - transfers it as useful heat to a system to be heated at a higher temperature. This process is used for both heat generation and cold generation. In the cooling process, the useful energy is the heat absorbed from the room to be cooled, which, together with the drive energy, is dissipated to the environment as waste heat.
- a refrigeration circuit of a heat pump can include an evaporator, a compressor, a condenser and/or an expansion valve.
- the evaporator can be set up to change a state of aggregation of a fluid in the refrigeration circuit from liquid to gaseous by supplying thermal energy from a heat source or from a cooling circuit/primary circuit.
- the compressor can be configured to compress the gaseous fluid such that the pressure and a temperature of the gaseous fluid are increased.
- the condenser can be set up to change the physical state of the fluid from gaseous to liquid by releasing thermal energy to a secondary circuit, in particular to a heating circuit or a heat sink.
- the expansion valve can be set up to cause the liquid fluid to expand so that the pressure of the liquid fluid drops. As a result, thermal energy can be supplied from a heat source or a cooling circuit to a heating circuit/secondary circuit or a heat sink.
- the heat medium circulating system includes a heater for heating a liquid heat medium, a pump configured to circulate the heat medium through a circulation circuit passing through an indoor heat port and the heater; a controller electrically connected to the heater and the pump, the controller configured to perform an indoor heating operation for supplying the heat medium heated by the heater to the indoor heat connector and a defrosting operation to remove frost adhered to the air heat exchanger , to let melt; and means for detecting a supply temperature representing a temperature of the heating medium supplied to the indoor heating connector from the heating means.
- the heating device includes an air heat exchanger configured to exchange heat between a coolant and air; and a compressor configured to compress the refrigerant.
- the controller disables the compressor when the supply temperature exceeds a first disable temperature in the indoor heating operation after a predetermined period of time has elapsed from a switch timing from the defrosting operation to the internal heating operation, and does not disable the compressor when the supply temperature exceeds the first disable temperature in the internal heating operation exceeds a post-defrost period, which is a period until the predetermined period of time has elapsed from the switching time.
- One aspect of the invention relates to a method for monitoring a heat pump.
- the method can include the steps of providing reference data; detecting a running time of the heat pump; comparing the running time of the heat pump with the reference data; and determining a monitoring result as a function of the result of the comparison of the running time of the heat pump with the reference data.
- the provision of reference data can include querying data from a reference heat pump, from cloud storage, from a storage unit, etc.
- an error message can be issued.
- a control intervention in a control method of the heat pump can be carried out depending on the monitoring result. Carrying out the control-technical intervention can be suggested in particular in the error message and only carried out after confirmation by a user or operator of the heat pump.
- a control intervention means that a control method of the heat pump is changed or adapted, for example by changing one or more control parameters.
- parameters of a heating curve can be adjusted.
- Further examples of a control intervention include increasing or decreasing a volume flow in a heating circuit of the heat pump.
- an output of the heat pump can be changed depending on the monitoring result.
- the technical control intervention can be carried out by changing one or more setpoints, for example a volume flow in the heating circuit and/or a temperature (e.g. flow temperature) and/or an output (e.g. heating output of the heat pump).
- the recording of a running time of the heat pump can include recording different modes of the heat pump as a function of time.
- a mode are power operation, standby operation, heat pump off, heat production mode, refrigeration mode, operation at a specified power, operation in a specified power interval, on Demand-response operation, normal operation, heating operation, operation for heating water, etc.
- the detection of a running time can include the detection of electrical energy consumption.
- the reference data can include running times of a reference operation, in particular from a simulation and/or from a reference heat pump. This has the advantage that the heat pump can be monitored particularly easily with regard to efficiency, since data collection and an evaluation of the data with regard to efficiency take place in a particularly simple and expedient manner.
- the provision of reference data can include providing a minimum length of an operating interval
- recording the runtime of the heat pump can include recording the duration of an operating interval of the heat pump as the length of the operating interval
- comparing the runtime of the heat pump with the reference data can include comparing the Minimum operating interval length with the operating interval length.
- An operating interval of the heat pump can be a period of time in which the heat pump is operated with the aim of heating and/or cooling. This has the advantage that short operating intervals, which are particularly inefficient, can be detected in a simple manner. Furthermore, faults in the operation of a heating system with a heat pump can be detected in a particularly simple manner, so that the faults can be corrected and the wear and tear on the heat pump can be reduced.
- the provision of reference data can include providing a minimum length of an operating pause
- detecting the runtime of the heat pump can include detecting a duration of an operating pause of the heat pump as the pause interval length
- comparing the runtime of the heat pump with the reference data can include comparing the minimum length of the pause in operation with the length of the pause interval.
- An operating pause is an operating state of the heat pump in which the heat pump is operated neither with the aim of generating heat nor with the aim of generating cold. Examples of corresponding operating states can be a standby mode and/or a switched-off heat pump.
- short pause intervals in the operation of the heat pump can be determined and, based on the determined short pause intervals, a fault in the operation of the heat pump can be detected. Since switching from a pause in operation the heat pump is particularly inefficient in a load operation of the heat pump, operating pauses of short duration are recorded accordingly.
- the provision of reference data can include the provision of an upper and/or a lower limit value of a ratio between the length of the operating interval and the length of the pause interval.
- the method can include the step of determining a ratio between the length of the operating interval and the length of the pause interval as a runtime ratio, the comparison of the runtime of the heat pump with the reference data including a comparison of the runtime ratio with the upper and/or lower limit value.
- the reference data can be provided depending on one or more, in particular all, from the group: a heat pump device type, in particular air-to-water heat pump, brine-to-water heat pump, water-to-water heat pump, etc.; a control method of the heat pump, in particular a power control of the heat pump or a constant power of the heat pump; a performance class to which the heat pump is assigned; an operating mode of the heat pump, in particular demand-response operation, normal operation, hot water preparation, heating operation, cooling operation, etc.; a climate zone in which the heat pump is installed; an age of the heat pump; an outside temperature; a humidity level; a time, especially a season, a time of day, a Weekday; a wind force.
- the reference data can be adapted in particular to influences that affect the operation of the heat pump and/or its running time, and the number of errors that are incorrectly detected or errors that are incorrectly not detected can be reduced.
- the reference data can be provided as a function of a plurality of operating data from heat pumps and/or as a function of a simulation, in particular a number of simulations, of a heat pump system.
- a simulation in particular a number of simulations, of a heat pump system.
- the reference data for the heat pump system can be comprehensively adapted to the heat pump by means of a simulation.
- the simulation(s) can be used to generate reference data for heat pump systems for which no practical data is available.
- the recording of a running time of the heat pump can include recording the duration of a plurality of operating intervals.
- the method can include the step of determining an operating interval length as a function of the duration of the plurality of operating intervals. This can improve the informative value of the comparison, since short-term fluctuations in operation can be filtered out in the majority of operating intervals, so that the actual efficiency of the heat pump is falsified as little as possible by these fluctuations.
- the detection of a running time of the heat pump can include the detection of the duration of a plurality of operating pauses.
- the method can include the step of determining a pause interval length as a function of the duration of the plurality of operational pauses.
- the detection of a running time of the heat pump can include detecting the duration of a plurality of operating intervals as a plurality of operating interval lengths, comparing the running time of the heat pump with the reference data, comparing the minimum length of the operating interval with the plurality of operating interval lengths, and that A monitoring result is determined as a function of the results of the comparisons of the minimum length of the operating interval with the plurality of operating interval lengths. This can ensure that a duration of an operating interval of the heat pump, which can indicate a safety risk of the heat pump, for example, is used to determine the monitoring result.
- detecting a runtime of the heat pump can include detecting the duration of a plurality of operating pauses as a plurality of pause interval lengths, wherein comparing the runtime of the heat pump with the reference data includes comparing the minimum length of the operating pause with the plurality of pause interval lengths, and a monitoring result is determined as a function of the results of the comparisons of the minimum length of the operating pause with the plurality of pause interval lengths. It can thereby be ensured that a duration of an operating break of the heat pump, which can indicate a safety risk of the heat pump, for example, is used to determine the monitoring result.
- the detection of a running time of the heat pump can include a detection of a plurality of operating data, each of which includes a duration of an operating interval of the heat pump as an operating interval length and a duration of an operating pause of the heat pump as a pause interval length.
- the method can include the step of determining a ratio between the length of the operating interval and the length of the pause interval as a runtime ratio for each of the plurality of operating data, the comparison of the runtime of the heat pump with the reference data including a comparison of the runtime ratios with the upper and/or lower limit value.
- An operating interval advantageously follows a pause interval in terms of time, or the pause interval follows the operating interval in terms of time, the duration/length of which is used to determine a corresponding running time ratio.
- a ratio between the length of the operating interval and the length of the pause interval of the heat pump, which can indicate a safety risk of the heat pump, for example, is used to determine the monitoring result.
- a particularly further developed embodiment can additionally include the steps of determining stochastic operating data from the plurality of operating interval lengths, from the plurality of pause interval lengths and/or from the plurality of runtime ratios; and determining stochastic reference data as a function of the reference data if the reference data does not include any stochastic reference data.
- the comparison of the running time of the heat pump with the reference data can then include a comparison of the stochastic operating data with the (corresponding) stochastic reference data.
- the determination of stochastic operating data and/or stochastic reference data can include, for example, determining one or more from the group: a distribution function, a frequency distribution, a probability distribution, a mean value, a standard deviation, a variance.
- a particularly safety-conscious embodiment can include the steps of providing one or more reference outputs of the heat pump, in particular a maximum and/or minimum output of the heat pump; detecting an electrical power during the duration of the operation interval of the heat pump; Comparing the detected electrical power with the one or more reference power of the heat pump include.
- the monitoring result can then also be determined as a function of the result of the comparison of the electrical power recorded with the one or more reference powers.
- the one or more reference services can be provided depending on one or more, in particular all, from the group: a device type of heat pump, in particular air-to-water heat pump, brine-to-water heat pump, water-to-water heat pump, etc .; a control method of the heat pump, in particular a power control of the heat pump or a constant power of the heat pump; a performance class to which the heat pump is assigned; an operating mode of the heat pump, in particular demand-response operation, normal operation, hot water preparation, heating operation, cooling operation, etc.; a climate zone in which the heat pump is installed; an age of the heat pump; an outside temperature; a humidity level; a time, in particular a season, a time of day, a day of the week; a wind force; etc.
- the reference data can be adapted in particular to influences that affect the operation of the heat pump and/or its running time, and the number of errors that are incorrectly detected or errors that are incorrectly not detected can be
- the one or more reference powers can be provided as a function of a plurality of operating data from heat pumps and/or as a function of a simulation, in particular a number of simulations, of a heat pump system.
- a large number of operating data from heat pumps other heat pumps
- practical reference performance can be collected for efficient operation of a heat pump.
- Simulation data can be provided by simulating a heat pump system.
- the one or more reference outputs can then be adjusted to the heat pump system, including the heat pump, as a function of the simulation data.
- the simulation(s) can be used to generate reference outputs for heat pump systems for which no practical data is available.
- a particularly advantageous method can include the step of outputting an error message as a function of the monitoring result and possibly as a function of one or more comparison results. In this way, a fault in the operation of the heat pump can be pointed out in a particularly targeted manner. If the error message is output as a function of one or more comparison results, an expert/user can also be given assistance in eliminating the error.
- an error message can also be output as a function of a result of one or more of the following comparisons: a specified return temperature with a detected return temperature of the heat pump; a predetermined flow temperature with a detected flow temperature of the heat pump; a first predetermined reference value with a difference between the detected return temperature and the detected flow temperature; a second predetermined reference value with a detected primary volume flow; a third predetermined reference value with a detected pressure in the heat pump system; a fourth predetermined reference value with a detected primary temperature; a fifth predetermined reference value with a difference between the recorded inlet and outlet temperature of the primary side.
- a primary volume flow is, for example, a volume flow in the primary circuit of the heat pump.
- a heat pump can regularly include a primary circuit, a cooling circuit and a secondary circuit.
- a primary circuit and/or secondary circuit can be integrated in the refrigeration circuit.
- a primary circuit is used to absorb heat from the environment, e.g. from the air, from water, from the ground, etc.
- the secondary circuit is used to emit heat, e.g. to a heating circuit, a hot water circuit, a heat sink, etc.
- the primary circuit and/or the secondary circuit can be connected to the refrigeration circuit via a heat exchanger.
- the numbering of the reference values as first, second, third, fourth, fifth is not intended to represent any sequence or order of the reference values among one another, but only serves to distinguish the individual reference values from one another.
- the refrigeration circuit emits generated heat/cold, for example by means of a heat exchanger/cold exchanger, to the secondary circuit.
- the secondary circuit can include a high-temperature flow (heating circuit) and a return.
- the primary circuit can include a low-temperature flow (cooling circuit) and a return.
- both a secondary circuit in the form of a heating circuit and a primary circuit in the form of a cooling circuit can be connected to the cooling circuit through a heat exchanger for heat/cold transfer.
- a primary temperature is a temperature measured in the primary circuit.
- a primary volume flow is a volume flow in the primary circuit.
- a detected pressure in the heat pump system can be a detected pressure in the primary circuit, a detected pressure in the secondary circuit and/or a detected pressure in the refrigeration circuit.
- running times and/or detected electrical powers of a first time interval can be compared with running times and/or detected electrical powers of a second time interval, in particular several second time intervals, for example by comparing operating interval lengths, pause interval lengths, running time ratios, detected powers, etc.
- This can have the advantage that a drop in efficiency can be detected particularly easily.
- the system may include a reference data providing unit configured to provide reference data; a detection unit that is set up to detect a running time of the heat pump; a comparison unit configured to compare the running time of the heat pump with the reference data; and a monitoring result determination unit that is set up to determine a monitoring result depending on the result of the comparison of the running time of the heat pump with the reference data.
- a runtime can include data about operation of the heat pump as a function of time.
- the running time can include data about the duration of an operating interval and/or a length of a pause interval, for example as a function of time.
- the detection unit can include a memory unit in which corresponding data are stored.
- the detection unit can include one/or more sensors.
- the detection unit a communication unit for receiving and/or querying data, in particular a runtime, for example from a sensor, a storage unit, a cloud storage etc.
- the unit for providing reference data can include a memory in which reference data is stored.
- the unit for providing reference data can include a communication unit that is set up to receive reference data, for example from a storage unit, a cloud storage device, a simulation unit that is set up to carry out a simulation as a function of provided data, a further heat pump , etc. to receive and/or query.
- a communication unit and/or a storage unit can be used equally by the acquisition unit and the unit for providing reference data.
- the reference data can include data relating to a reference runtime, in particular a reference operating time, a reference interval length, etc.
- a particularly advanced system can include an output unit that is set up to output an error message depending on the monitoring result and possibly depending on one or more comparison results.
- the output unit can be set up, for example, to output the error message acoustically, in particular by means of a loudspeaker, and/or visually, in particular by means of a display unit.
- the output unit can be set up to send a message to an external device using a communication unit.
- An external device can be a PC, a mobile phone, a server, etc., for example.
- the output unit can be set up to output a signal for carrying out a control intervention in a control method of the heat pump as a function of the monitoring result.
- the message may be an SMS, an email, a markup language message, and so on.
- a message can be sent to a specialist (customer service fitter), to a user, to a maintenance service, to a heat pump operator and/or to a manufacturer etc., in particular depending on a monitoring result and/or one or more comparison results. In the following, this list is summarized by the terms "user or operator of the heat pump". As a result, a heat pump can be operated in a particularly targeted manner in terms of safety and efficiency.
- a message can be sent to an external device depending on a monitoring result and/or one or more comparison results.
- the message can include an error message.
- the message can contain a suggestion for carrying out the control-related intervention.
- a user or operator of the heat pump can trigger the implementation of the proposed control intervention by entering a confirmation.
- a further aspect of the invention relates to a computer program product comprising instructions which, when the program is executed by a computer, cause the latter to carry out the steps of the method according to one of claims 1 to 15.
- 1, 2 and 3 each show schematically a method for monitoring a heat pump according to an embodiment of the invention.
- FIG. 4 schematically shows a system for monitoring a heat pump according to an embodiment of the invention.
- 5 schematically shows a heat pump system according to an embodiment of the invention.
- FIG. 6a shows a performance diagram as a function of time for an inefficient heat pump
- FIG. 6b shows a frequency distribution of the running time of this
- FIG. 6c shows a power diagram of an efficient heat pump as a function of time
- FIG. 6d shows a frequency distribution of the running time of this
- FIG. 7 schematically shows a frequency distribution of the pause interval lengths and operating interval lengths of an optimized heat pump according to an embodiment of the invention.
- the method can include a step S10 providing reference data.
- Providing reference data can include providing a reference runtime for the heat pump.
- a reference runtime can include a minimum length of an operating interval of the heat pump and/or a minimum length of an operating pause.
- providing reference data can include providing an upper and/or a lower limit value of a ratio between an operating interval length and a pause interval length of the heat pump.
- the provision of reference data can include reading out and/or storing reference data from or in a storage unit.
- the provision of reference data can include initializing a variable or a constant in a computer program product.
- the method includes the step Sil detecting a running time of the heat pump.
- the recording of a running time can include recording a duration of an operating interval of the heat pump as an operating interval length and/or recording a duration of an operating pause of the heat pump as a pause interval length.
- An operating interval length gives the duration of an operating interval of the heat pump in one load operation again.
- a load operation is preferably an operation in which the heat pump is operated with the aim of generating heat or cold.
- a break in operation can be present, for example, in a standby mode or when the heat pump etc. is switched off.
- the heat pump is not operated with the aim of generating heat and/or cold during a pause in operation.
- the recorded running time of the heat pump is compared with the reference data.
- the comparison can include a qualitative and/or quantitative comparison, for example.
- the result of the comparison can be an absolute or a relative result.
- a monitoring result is determined as a function of the result of the comparison of the running time of the heat pump with the reference data.
- the method can include an optional step S14 outputting an error message depending on the monitoring result.
- the error message can contain an error code depending on the monitoring result.
- the error message, in particular an error code can also be output as a function of one or more comparison results.
- a unit for outputting the error message in particular a display unit, a loudspeaker unit and/or a communication unit, can be selected depending on an error code and/or one or more comparison results.
- the method can include an optional step S15 determining a ratio between the operating interval length and the pause interval length as a runtime ratio, in which case comparing the runtime of the heat pump with the reference data includes comparing the runtime ratio with an upper and/or lower limit value in step S12 .
- step S21 Determining stochastic operating data from a plurality of operating interval lengths, from a plurality of pause interval lengths and/or from a plurality of runtime ratios.
- step S21 can be performed after step S11 and before step S12.
- the comparison in step S12 can include a comparison of the stochastic operating data with the stochastic reference data.
- the method can include a further optional step S22 of determining stochastic reference data as a function of the reference data, in particular if the reference data does not include any stochastic reference data or stochastic reference data is only available for part of the reference data. This can ensure that the recorded transit times can be optimally compared with the reference data.
- step S22 can be omitted.
- FIG. 3 schematically shows a method for monitoring a heat pump according to an embodiment of the invention.
- the method shown in FIG. 3 is based on the method shown in FIG. 1 and differs from it in that it optionally includes steps S31 to S33.
- one or more reference outputs of the heat pump in particular a maximum and/or a minimum reference output of the heat pump, can be provided.
- a reference output can be provided, for example, using a simulation or using output values from another heat pump.
- step S32 an electric power is detected during an operation interval of the heat pump.
- the detected electrical power is compared with the one or more reference powers of the heat pump.
- the monitoring result can then be determined in step S13 depending on the result of the comparison of the electrical power with the one or more reference powers from step S32.
- steps S21, S22, S14, S15, S31 to S33 can be combined independently of one another with steps S10 to S13 or S11 to S13.
- Process steps are executed in parallel, combined, split up, combined, added etc. without changing the essence of the invention.
- the order of the method steps can be interchanged without thereby affecting the essence of the invention.
- a computer program product may include instructions which, when the program is executed by a computer, cause the computer to carry out method steps of the methods shown in FIGS. 1 to 3.
- the system 40 includes a unit 41 for providing reference data, an acquisition unit 42, a comparison unit 43, and a monitoring result determination unit 44.
- the system 40 can additionally include an output unit 45.
- the unit 41 for providing reference data is set up to provide reference data.
- the unit 41 can comprise a memory unit in which the reference data is stored and/or a communication unit, by means of which the reference data can be received or queried.
- the detection unit 42 is set up to detect a running time of the heat pump.
- the detection unit 42 can be connected to a control unit of the heat pump and/or to one or more sensors.
- the detection unit 42 can include a communication unit that is set up to receive or query the runtime of the heat pump from the heat pump or a cloud storage device.
- the unit 41 and the detection unit 42 may share a communication unit and/or a storage unit.
- the comparison unit 43 is set up to compare the running time of the heat pump with the reference data.
- the comparison unit 43 can comprise one or more analog and/or digital circuits, in particular a computing unit.
- the monitoring result determination unit 44 is set up to determine a monitoring result depending on the result of the comparison of the running time of the heat pump with the reference data. In some embodiments, the monitoring result determination unit 44 may be set up to additionally determine the monitoring result as a function of one or more further comparison results.
- the monitoring result determination unit 44 can include one or more analog and/or digital circuits, in particular a computing unit. In some embodiments, units 43 and 44 may share a computing unit.
- the output unit 45 is set up to output an error message depending on the monitoring result and possibly depending on one or more comparison results.
- the output unit 15 can be set up to output an error message visually, for example using a display, and/or acoustically, in particular using a loudspeaker, possibly depending on the monitoring result and/or one or more comparison results.
- the output unit can include a communication unit that is set up to transmit an error message to an external unit, in particular depending on the monitoring result and/or one or more comparison results.
- An external unit can be a mobile radio device, a server, a maintenance device, etc., for example.
- the output unit 45 can also be set up to output a signal that brings about a control intervention.
- the technical control intervention can be carried out after confirmation by a user or operator of the heat pump.
- the technical control intervention can be suggested in the error message that is output.
- a long running time of the heat pump with short breaks in operation can be recorded.
- exceeding the maximum return temperature can be detected.
- the user or operator of the heat pump can receive an error message that the maximum return temperature has been exceeded.
- a possible control intervention includes, for example, increasing the volume flow by appropriately controlling a circulating pump in the heating circuit and/or reducing the output of the heat pump.
- the proposed or implemented control intervention can Among other things, it can also depend on whether the heat pump is being operated in heating mode or for hot water preparation.
- the output unit may share a communication unit with unit 41 and/or 42.
- the output unit can be set up to output an error code as a function of the monitoring result and possibly as a function of one or more comparison results in the course of outputting the error message.
- An error code can be a code word representing a given error/type of error.
- an error code may also include a description of the error.
- units of system 40 may be separated, combined, etc. without affecting the essence of the invention. In some embodiments, further units can also be added without affecting the gist of the invention.
- FIG. 5 schematically shows a heat pump system according to an embodiment of the invention.
- a heat pump 51 a cooling side 52 and a heating side 53 are shown.
- the heat pump 51 shown in FIG. 5 comprises a compressor 512, a condenser/condenser 513, an expansion valve 514 and an evaporator 511, which are connected to one another in a refrigeration circuit 515.
- the heat pump may differ from the heat pump shown in FIG. 5 without changing the essence of the invention.
- the evaporator 511 can also function as a heat exchanger, as a heat exchanger between the refrigeration circuit 515 and the cooling side 52 .
- the cooling side 52 can be a simple source of heat, such as e.g. B.
- the cooling side 52 can include one or more cooling circuits 523, 524. In some embodiments, the cooling side 52 can form a primary circuit 522 . In some embodiments, cooling side 52 may be integrated with refrigeration circuit 515 .
- the heating side 53 can form a secondary circuit 532 (heating circuit and/or hot water circuit).
- the condenser/condenser 513 can be used as Heat exchangers for transferring the heat from the refrigeration cycle circuit 515 to the heating side 53 function.
- One or more heating circuits 533, 534 and/or hot water circuits 535 can be arranged on the heating side 53, for example.
- the heat side 53 may comprise a heat sink in addition to or instead of the heating circuits.
- the warm side 53 may be integrated with the refrigeration circuit.
- the heat pump system shown in FIG. 5 is only for illustration and basic understanding of a heat pump and is not intended to limit the scope of the invention in any way. Furthermore, individual sections of the heat pump 51 and on the cooling side 52 and on the heating side 53 can be designed differently without restricting the functionality of the invention in any way.
- FIG. 6a shows a performance diagram of an inefficient heat pump as a function of time
- FIG. 6b shows a frequency distribution of the running time of this heat pump
- FIG. 6c shows a power diagram of an efficient heat pump as a function of time
- FIG. 6d shows a frequency distribution of the running time of this heat pump.
- the days of a year are plotted on the x-axis and the time of a day is plotted on the y-axis.
- the resolution with respect to the y-axis is 10 minutes.
- a color scheme is shown as a legend on the right-hand side of FIGS. 6a and 6c. The color scheme represents the electrical power consumed by the heat pump in watts.
- the pause interval length in hours is plotted on the x-axis
- the operating interval length in hours is plotted on the y-axis
- the number of events is plotted in the z-direction.
- the data of the graph of Figure 6b is taken from the graph of Figure 6a and the data of the graph of Figure 6c is taken from the graph of Figure 6d.
- the inefficient heat pump is very often operated at a very high output, ie at more than 4000 watts, for a relatively short time, ie less than 40 minutes. Break intervals are also usually very short, especially at the beginning and end of the year. This can be seen in particular from the diagram in FIG. 6b. So accumulates the bulk of the events of the inefficient Heat pump in the front corner, ie the heat pump is operated with particularly short operating intervals and particularly short pause intervals.
- an operating interval usually lasts between one and three hours and the pause interval usually lasts between one and three hours.
- the events of the efficient heat pump are concentrated around an operating interval length of 1.5 hours and a pause interval length of 1.5 hours.
- the efficient heat pump is operated with much less power. In most cases, the efficient heat pump is operated with an output of between 500 and 1500 watts.
- a cumulative frequency for a specified range of a distribution function in particular a frequency distribution/probability distribution, can be determined and compared with a reference value.
- 7 schematically shows a diagram of a frequency distribution of the pause interval lengths and operating interval lengths of an optimized heat pump according to an embodiment of the invention.
- the pause interval length is plotted on the x-axis and the operating interval length on the y-axis.
- the number of events is plotted on the z-axis. It can be seen from FIG. 7 that an operating interval of the heat pump lasts at least five minutes.
- a pause interval of the heat pump also lasts at least five minutes.
- an efficient heat pump in particular in one of the embodiments shown in Figures 1 to 7, between 0.05 and 3.0, in particular between 0.07 and 2.4 activations per hour of operation (number of operating interval starts per hour of operation) of an efficient heat pump can be assumed.
- An operating hour is an hour in which the heat pump is in operation.
- the total of all operating hours corresponds to the total of all operating interval lengths.
- a heat pump of a variable capacity - geothermal type can be considered an efficient heat pump at an average of between 0.05 and 0.2 starts per hour of operation. In some embodiments, a heat pump of a variable capacity - air type can be considered an efficient heat pump at an average of between 0.2 and 0.6 starts per hour of operation. In some embodiments, a heat pump of a "constant output - geothermal" type can be assumed to be an efficient heat pump with an average of between 0.8 and 2.4 starts per hour of operation.
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- Combustion & Propulsion (AREA)
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Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102021105836.8A DE102021105836A1 (de) | 2021-03-10 | 2021-03-10 | Verfahren, computerprogramm-produkt und system zum überwachen einer wärmepumpe |
| PCT/EP2022/054987 WO2022189186A1 (de) | 2021-03-10 | 2022-02-28 | Verfahren, computerprogramm-produkt und system zum überwachen einer wärmepumpe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4305357A1 true EP4305357A1 (de) | 2024-01-17 |
Family
ID=80684121
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP22708930.7A Pending EP4305357A1 (de) | 2021-03-10 | 2022-02-28 | Verfahren, computerprogramm-produkt und system zum überwachen einer wärmepumpe |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20240410632A1 (de) |
| EP (1) | EP4305357A1 (de) |
| CN (1) | CN116964387A (de) |
| DE (1) | DE102021105836A1 (de) |
| WO (1) | WO2022189186A1 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102022121914A1 (de) * | 2022-08-30 | 2024-02-29 | Jürgen Falkenstein | Wärme- und Kältespeicher mit Gegenstromwärmetauscher |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2758153C2 (de) | 1977-12-27 | 1983-08-04 | Brown Boveri - York Kälte- und Klimatechnik GmbH, 6800 Mannheim | Steuerungsverfahren für eine Verbund-Kälteanlage |
| US4574871A (en) | 1984-05-07 | 1986-03-11 | Parkinson David W | Heat pump monitor apparatus for fault detection in a heat pump system |
| JPH04208368A (ja) | 1990-11-30 | 1992-07-30 | Toshiba Corp | 空気調和機 |
| US5647533A (en) | 1995-05-23 | 1997-07-15 | Carrier Corporation | Run time criteria to control indoor blower speed |
| US7644869B2 (en) * | 2005-12-28 | 2010-01-12 | Honeywell International Inc. | Auxiliary stage control of multistage thermostats |
| EP3705800A3 (de) * | 2012-07-03 | 2020-12-23 | Samsung Electronics Co., Ltd. | Diagnosesteuerungsverfahren für eine klimaanlage |
| CN105190193B (zh) * | 2013-03-29 | 2018-06-29 | 三菱电机株式会社 | 空调控制装置、空调控制系统和空调控制方法 |
| US10018400B2 (en) | 2013-08-13 | 2018-07-10 | Lennox Industries Inc. | Defrost operation management in heat pumps |
| US9709311B2 (en) | 2015-04-27 | 2017-07-18 | Emerson Climate Technologies, Inc. | System and method of controlling a variable-capacity compressor |
| JP6721116B2 (ja) | 2017-04-07 | 2020-07-08 | 三菱電機株式会社 | 熱媒循環システム |
| EP3640556B1 (de) * | 2017-05-24 | 2025-03-19 | Carrier Japan Corporation | Klimaanlage |
| CN108800441B (zh) * | 2018-06-25 | 2019-08-27 | 宁波奥克斯电气股份有限公司 | 多联机除霜控制方法及空调多联机系统 |
| CN110925950A (zh) * | 2019-11-20 | 2020-03-27 | 广东美的暖通设备有限公司 | 一种空调系统的控制方法、装置、电子设备及存储介质 |
-
2021
- 2021-03-10 DE DE102021105836.8A patent/DE102021105836A1/de active Pending
-
2022
- 2022-02-28 EP EP22708930.7A patent/EP4305357A1/de active Pending
- 2022-02-28 WO PCT/EP2022/054987 patent/WO2022189186A1/de not_active Ceased
- 2022-02-28 CN CN202280020284.3A patent/CN116964387A/zh active Pending
- 2022-02-28 US US18/262,757 patent/US20240410632A1/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| DE102021105836A1 (de) | 2022-09-15 |
| CN116964387A (zh) | 2023-10-27 |
| US20240410632A1 (en) | 2024-12-12 |
| WO2022189186A1 (de) | 2022-09-15 |
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