EP4449027A1 - Verfahren zum betreiben einer wärmepumpe - Google Patents
Verfahren zum betreiben einer wärmepumpeInfo
- Publication number
- EP4449027A1 EP4449027A1 EP22835637.4A EP22835637A EP4449027A1 EP 4449027 A1 EP4449027 A1 EP 4449027A1 EP 22835637 A EP22835637 A EP 22835637A EP 4449027 A1 EP4449027 A1 EP 4449027A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- heat pump
- heating register
- limit value
- heat
- heating
- 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
-
- 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
- F24D19/1084—Arrangement or mounting of control or safety devices for air heating systems
- F24D19/1087—Arrangement or mounting of control or safety devices for air heating systems system using a heat pump
-
- 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
- F24D5/00—Hot-air central heating systems; Exhaust gas central heating systems
- F24D5/12—Hot-air central heating systems; Exhaust gas central heating systems using heat pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F12/00—Use of energy recovery systems in air conditioning, ventilation or screening
- F24F12/001—Use of energy recovery systems in air conditioning, ventilation or screening with heat-exchange between supplied and exhausted air
- F24F12/002—Use of energy recovery systems in air conditioning, ventilation or screening with heat-exchange between supplied and exhausted air using an intermediate heat-transfer fluid
- F24F12/003—Use of energy recovery systems in air conditioning, ventilation or screening with heat-exchange between supplied and exhausted air using an intermediate heat-transfer fluid using a heat pump
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F12/00—Use of energy recovery systems in air conditioning, ventilation or screening
- F24F12/001—Use of energy recovery systems in air conditioning, ventilation or screening with heat-exchange between supplied and exhausted air
- F24F12/006—Use of energy recovery systems in air conditioning, ventilation or screening with heat-exchange between supplied and exhausted air using an air-to-air heat exchanger
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H15/00—Control of fluid heaters
- F24H15/20—Control of fluid heaters characterised by control inputs
- F24H15/258—Outdoor temperature
-
- 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
- F24H15/395—Information to users, e.g. alarms
-
- 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
- F24H15/40—Control of fluid heaters characterised by the type of controllers
- F24H15/414—Control of fluid heaters characterised by the type of controllers using electronic processing, e.g. computer-based
- F24H15/45—Control of fluid heaters characterised by the type of controllers using electronic processing, e.g. computer-based remotely accessible
- F24H15/457—Control of fluid heaters characterised by the type of controllers using electronic processing, e.g. computer-based remotely accessible using telephone networks or Internet communication
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2221/00—Details or features not otherwise provided for
- F24F2221/34—Heater, e.g. gas burner, electric air heater
Definitions
- the present invention relates to a method for operating a heat pump with a heating register in a ventilation system.
- the method is intended to prevent the heating register of the heat pump from being operated unintentionally when the outside temperature is above a limit temperature. As a result, an unnecessarily high energy consumption and correspondingly high costs can be avoided.
- heat pumps used to heat a building and/or hot water are usually not designed for the absolute lowest possible temperatures in a specific location over the year. Instead, heat pumps often have an electrical heating device, for example a heating register for heating air or a heating rod for heating water, in order to provide additional heating capacity when the heat pump alone can no longer deliver the required heating capacity. This can be the case in particular when the outside temperatures are very low. Both air-to-water heat pumps and air-to-air heat pumps can work less efficiently when outside temperatures are particularly low.
- An electrical heating register is less efficient than a heat pump and ideally can only generate one kilowatt hour of heat energy from one kilowatt hour of electrical energy.
- the heat pump on the other hand, is significantly more efficient and, depending on the outside conditions, can generate 3 to 4 kilowatt hours of heat energy from one kilowatt hour of electrical energy.
- a long operation of the heating register is therefore undesirable from an economic point of view and should be avoided if possible.
- the heating register should only be operated if the heat pump alone cannot provide sufficient heat output.
- long and/or frequent operation of a heating coil can give an indication that the heat pump or another part of a ventilation system with a heat pump is defective and/or needs maintenance. In order to ensure efficient and economical operation of a ventilation system with a heat pump, it is therefore desirable to be able to reliably and quickly identify long-term and/or frequent operation of the heating register in order to be able to take appropriate countermeasures.
- a heat pump with an additional electric heating element is described, for example, in DE 699 25389 T2. If the outside temperature is below a limit value, the additional electric heating element is activated in order to heat up air supply to the heat pump.
- the object of the present invention is to overcome the problems known in the prior art and to specify a method for operating a heat pump that is improved compared to the prior art. Furthermore, an improved ventilation system with a heat pump is to be provided. The object is achieved by the method according to claim 1 and by the ventilation system according to claim 7. Further aspects of the invention are the subject matter of the dependent claims, the following description of the exemplary embodiments and the drawings.
- a heat pump according to the invention for heating air in a ventilation system for a building transfers heat to a fluid heat transfer medium, here in particular air, which flows through one or more ventilation ducts of the ventilation system.
- the ventilation ducts can be designed, for example, as a system of tubes or lines through which the heat transfer medium flows.
- the ventilation system comprises a supply duct, via which warm supply air is provided to a room, and a return duct, via which exhaust air is discharged from the room.
- a flow duct is also referred to as a supply air duct.
- a multiplicity of outlets for discharging the heated air into the room air of a room can also be arranged.
- the return duct can have a large number of openings for sucking in room air as exhaust air.
- At least one pump or at least one fan for generating an air flow can be arranged in the return duct and/or in the flow duct.
- Such a return duct is also referred to as an exhaust air duct.
- the ventilation system can have at least one ventilation duct for sucking in fresh outside air, which is also referred to as outside air duct.
- the ventilation system can have at least one ventilation duct for discharging used exhaust air, which is also referred to as an exhaust air duct.
- These ventilation ducts can be flow-connected to an environment of the building via suitable openings.
- the ventilation ducts of the ventilation system can be divided into several subsystems, which can be separated according to heating purpose, for example.
- a flow duct of a ventilation duct can branch out from the heat pump into two or more flow ducts.
- a first supply duct can be provided for heating rooms on a first floor of a building.
- a second supply duct may be provided for heating rooms on a second floor of a building.
- a separate supply duct can be provided for each floor of a building.
- the individual flow ducts can be opened or closed using suitable valves, so that a supply of warm air can be set individually for each floor.
- the allocation can also be made according to apartments on one floor or according to other criteria.
- the ventilation ducts can be supplied with fresh air (outside air) from outside the building via one supply duct or several supply ducts.
- the heat pump can then heat the fresh air before it is fed to the flow duct.
- exhaust air can be discharged to the outside via an exhaust air duct or several exhaust air ducts.
- one or more supply ducts are coupled via a heat exchanger to one or more flow ducts for supply air, so that there is no direct air exchange of room air with the outside air via the ventilation system.
- one or more exhaust air ducts can be coupled as return ducts via the heat exchanger to one or more exhaust air ducts for exhaust air.
- supply air can be used for recirculated room air or for freshly supplied outside air or fresh air.
- exhaust air can be used for indoor air that is sucked in by the ventilation system for recirculation, or that is discharged to the outside as exhaust air.
- the heat pump can be arranged in such a way that an evaporator of the heat pump is arranged in the outgoing air duct for outgoing air. In this way, residual heat from the building can be reused for heating and the efficiency of the ventilation system can be increased.
- a condenser of the heat pump can be arranged in the supply air flow duct in order to heat the supply air.
- a heating coil can preferably be arranged downstream of the condenser in the direction of flow in order to supply additional heat to the supply air, in particular when the heat output of the heat pump is not sufficient to achieve a predetermined target temperature in the flow channel.
- a heating register is understood to be a device that can heat the air in a ventilation duct and consumes electrical energy for this.
- the heating register can have, for example, a large number of fins around which the air to be heated flows.
- the heating coil can be Flow direction can be arranged before or after the compressor of the heat pump in the ventilation duct.
- the ventilation system preferably includes an outside temperature sensor for detecting an outside temperature of the building.
- the heat pump has an electrical heating register for transferring heat to the fluid heat transfer medium, here in particular outside air or supply air.
- the control device is used to control an operating state of the heat pump and the heating register.
- the control device is configured to carry out a method according to the invention for operating the heat pump.
- An outside temperature can be detected in particular by an outside temperature sensor.
- the outside temperature can also be recorded in a different way.
- the outside temperature can be received from a server via a network or transmitted from another external device to the control device of the heat pump.
- a running time of the electrical heating register of the heat pump is recorded, for example by the control device.
- the limit temperature can be specified, for example, depending on a geographic position of the building.
- the limit temperature can in particular correspond to a design temperature of the heat pump.
- the heat pump can be designed to run efficiently most days of the year. In order to avoid expensive oversizing of the heat pump, the heat pump can be designed in such a way that a loss of efficiency of the heat pump is accepted on the coldest days of the year when the outside temperature is very low.
- the electrical heating register can provide additional heat output.
- the limit temperature is usually a temperature below zero and can in particular be changeable.
- the limit temperature can be in a range between -15°C and -5°C. If the outside temperature is above the limit temperature, the heating register should not be operated. If the heating register is operated anyway, this can be an indication of a defect or reduced efficiency of the heat pump.
- the running time of the heating register can be recorded in seconds, minutes or hours, for example.
- the running time of the heating register means an integrated period of time during which the heating register is in operation, ie it consumes electrical energy or converts it into heat energy.
- a running time per day or per 24 hours is recorded.
- a running time per week, per month, per year and/or in total from the start of operation of the heat pump and/or from a last maintenance date of the heat pump can also be recorded.
- the running time of the heating register is preferably recorded together with a respective time of operation of the heating register. In this way, it can be evaluated later at what times the heating register is used and whether there are certain times when the heating register is in operation particularly often. For example, after a night setback, heating up too quickly can result in the heating register being switched on to support the heat pump in order to reach a setpoint.
- a first limit value is set for the running time within a fixed period of time. For example, a maximum runtime can be set within a fixed period of one day or within 24 hours.
- the first limit value can be variable and can be defined as a function of various factors such as the time of year or a heating purpose. For example, a daily maximum running time of several minutes or a few hours can be specified, in particular in a range from 15 minutes to 2 hours.
- a second limit is set for the energy consumed in the specified time period. It is thus possible to monitor in particular whether the energy consumed on a day or within 24 hours exceeds the second limit value.
- the aim is to prevent or to recognize that the heating register consumes more than the permitted amount of energy. In comparison to monitoring only the running time alone, an undesired operation of the heating coil can thus be reliably detected.
- An exemplary range for the second limit value can be between 1 and 4 kWh per day, in particular the second limit value can be 2 kWh per day.
- a message is issued.
- a message is only issued if both limit values are exceeded.
- the “short period of time” mentioned above is in particular no longer than one hour, preferably no longer than half an hour and particularly preferably no longer than 15 minutes. If the heat pump is in an emergency operating state, the message does not need to be output.
- the message can in particular be a warning to draw the attention of a user of the heat pump to the fact that the heating register is or was in operation longer and/or with higher energy consumption than permitted or desired.
- a user can in particular also be understood as a person or the like commissioned and/or responsible for the maintenance of the heat pump or for the operation of the ventilation system, such as a heating technician or heating installer.
- the message can be any output that can be further processed electronically, for example in order to carry out a control intervention.
- the message can be transmitted, for example, via the network to the server or a cloud.
- the report can include a large amount of data about the operating status of the heat pump and/or the heating register, so that this data can be stored and/or processed further on the server or in the cloud, as will be described in more detail below.
- control engineering intervention can be carried out automatically or suggested by the control device in response to the message, so that it is only carried out after confirmation by a user.
- the message can already include the proposal for the control intervention.
- a possible problem with the heat pump can be reported along with an appropriate solution to the problem.
- the control-technical intervention can include that a night setback is adjusted.
- Night setback can mean that a target temperature (e.g. of the flow duct) is reduced overnight.
- Night setback means that energy can be saved overnight.
- reducing the target temperature(s) overnight to a lesser extent can have the advantage that less operation of the heat pump in the morning is sufficient to achieve the target temperature(s) during the day to reach again. Operation of the heating coil can then be reduced, particularly at low outside temperatures.
- the control intervention can include adjusting the heating times (or operating times). If, for example, it is recognized that the heating register is regularly used for heating in the morning hours (see night setback), an earlier point in time for starting a heating process by the heat pump can be set so that the target temperature(s) can be reached at a specified point in time without (or without). can be achieved with less) help from the heating register.
- the warning can be output by a control device of the heat pump to the user's end device, in particular a mobile end device such as a smartphone, tablet, laptop or other suitable device.
- the end device can receive the warning in particular via a network, for example the Internet.
- the warning can be displayed additionally or instead via a display device of the control device.
- the message or the warning can advantageously be used to avoid an undesired operating state of the heat pump.
- the warning can be used to determine that the heating register has exceeded the first and/or the second limit value. Appropriate countermeasures can then be taken accordingly.
- the warning can be an indication that the heat pump is working inefficiently and that the heat pump should be serviced.
- the control device of the heat pump regulates and/or controls the heat pump in particular as a function of one or more parameters, such as a set flow temperature, the outside temperature and the like.
- the Control device can receive the parameters from an external device, for example via a network.
- the parameters for regulating and/or controlling the heat pump can also be preprogrammed or stored in a local memory device.
- the heat pump can be controlled by means of a heating curve. Operating parameters are stored in the control device, in particular for emergency operation.
- the recorded values of the outside temperature and/or the running time of the heating register and/or the energy consumed by the heating register and/or the first limit value and/or second limit value and/or control parameters of the heat pump can be transmitted from the control device of the heat pump via the network to the cloud and /or be transferred to the server.
- This transmission of the values can take place independently of the message described above.
- the transmission can take place at regular time intervals, for example, so that a time series of data becomes available in the server and/or the cloud.
- the cloud and/or the server can further process the transmitted data and values and, in particular, evaluate them as a function of the first limit value and the second limit value.
- machine learning can also be used here, for example in order to recognize or predict a decrease in the efficiency of the heat pump at an early stage. Accordingly, the message can also be generated and output by the server.
- the server can determine optimized control parameters for the operation of the heat pump and the heater, and communicate the optimized control parameters via the network the
- the first limit value and/or the second limit value can be defined as a function of an operating state of the heat pump.
- operating states can be defined depending on a heating purpose of the heat pump. For example, between a first operating state for providing warm air for heating a first room or a first group of rooms (e.g. a first of a plurality of floors of a building) and a second operating state for providing warm air for heating a second room or a second Group (e.g. a second of a plurality of floors of a building) can be distinguished from rooms.
- the second limit value can be increased accordingly.
- the heat pump In the second operating state, the heat pump should primarily be operated without the help of the heating register.
- the first limit value and/or the second limit value can thus be reduced in the second operating state.
- the first limit value and/or the second limit value can be adapted to the heating purpose by means of a weighting.
- the weighting of the limit values can be reduced in the first operating state.
- the weighting of the limit values can be increased accordingly.
- the weighting can be set so that the message is issued earlier if the heating register is used for heating (second operating state).
- the permissible running time (first limit value) or the permissible energy consumption (second limit value) can be increased by multiplying it by a weighting factor greater than one.
- a weighting factor equal to two can be used. This can be implemented, for example, in such a way that the heating register is allowed to run for 30 minutes (first limit value) for operation in the second operating state and one hour for operation in the first operating state.
- the second limit value can be defined in such a way that 1 kWh energy consumption of the heating register for operation in the second operating state and 2 kWh energy consumption of the heating register for operation in the first operating state are permitted per day.
- the weighting with a factor of two is to be understood here in such a way that the heating register may be operated twice as long in the first operating state or may consume twice as much energy as in the second operating state before suitable countermeasures are taken.
- FIG. 1 illustrates a heat pump with a heating element according to the prior art.
- FIG. 2 illustrates a heat pump with a heating register according to an exemplary embodiment of the present invention.
- FIG. 3 illustrates a heat pump ventilation system according to an embodiment of the present invention.
- FIG. 4 shows a flow chart of a method according to the invention for operating a heat pump with a heating register according to an exemplary embodiment of the present invention.
- the heat pump 1 illustrates a conventional heat pump 1 according to the prior art.
- the heat pump 1 shown is in particular an air-water heat pump 1, which is used as a heat generator for a building.
- the air-to-water heat pump 1 can use the ambient air of the building as a heat source to heat the building.
- the heat pump 1 is divided into an outdoor unit A and an indoor unit B as a so-called split device. Accordingly, the outdoor unit A may be located in an outdoor area of the building, while the indoor unit B may be located in an indoor area of the building.
- a fan 3 actively sucks in outside air and forwards it to a heat exchanger, the evaporator 4 .
- a refrigerant circulates in this which, due to its thermal properties, changes its state of aggregation even at low temperatures.
- the circuit of the refrigerant is shown in FIG. 1 in dotted lines. If the refrigerant comes into contact with the "warm” outside air supplied, it heats up until it finally begins to evaporate. Since the temperature of the resulting steam is still relatively low, the steam flows on to an electrically driven compressor 5. This increases the pressure, which also causes the temperature to rise. Once the refrigerant vapor has reached the desired temperature level, it flows on to the next heat exchanger, the condenser 6. Here it transfers its heat to a hydraulic line system (shown in bold solid lines in FIG. 1) and condenses.
- the heat gained in this way can be used for heating or hot water preparation.
- the cooled refrigerant Before the cooled refrigerant can be heated and compressed again, it first flows through an expansion valve 8. The pressure and temperature drop to the initial level and the cycle can be repeated.
- the expansion valve 8 can be electronically controlled.
- the division of the components between the outdoor unit A and the indoor unit B is not fixed to that of FIG. 1 but can be variable.
- the condenser 6 can be arranged in the indoor unit B instead of in the outdoor unit A.
- the connection between the outdoor unit A and the indoor unit B can be made by means of refrigerant lines or by means of hydraulic lines.
- Water circulates in the hydraulic lines as a fluid heat transfer medium.
- the water absorbs heat from the refrigerant.
- heat is therefore transferred from the refrigerant to the heat transfer medium.
- a pump 7 arranged in the heating circuit can generate a desired volume or mass flow of the heat transfer medium.
- the pump 7 is arranged in the flow between the condenser 6 and a heating element 2.
- the arrangement of the pump 7 is not limited to this position.
- the pump 7 can also be arranged in the return line RL, for example.
- An electric heating element 2 is arranged in the internal unit B, which can function essentially like an electric immersion heater or instantaneous water heater and additionally heats the heat transfer medium if required.
- a control device 10 (not shown in FIG. 1) of the heat pump 1 can control, in particular, an electrical power consumption of the heating rod 2 , a speed of the pump 7 , the fan 3 , a degree of opening of the expansion valve 8 and the compressor 5 .
- the control device 10 can be arranged in the internal unit B, for example.
- the internal unit also has a 3-way switching valve 9, at which the flow from the heat pump branches into two flow lines VL1, VL2.
- the first flow line VL1 can lead, for example, into a heating circuit of a heating system (room heating).
- the second flow line VL2 can be used, for example, as a hot water line (drinking water heating).
- the ratio of the volume or mass flow of the heat transfer medium between the first flow VL1 and the second flow VL2 can be adjusted via the 3-way switching valve 9 .
- the heat transfer medium flows from the heating system or drinking water lines of the building back to the heat pump 1 via a return RL.
- the circuit of the refrigerant between the condenser 6 and the evaporator 4 is also referred to as the primary circuit or generator circuit.
- the circuit of the heat transfer medium with flow and return is also referred to as the secondary circuit or consumer circuit.
- Fig. 2 shows an exemplary embodiment of an air-to-air heat pump 1 according to the invention for a ventilation system, which is constructed similarly to the air-to-water heat pump from FIG. 1 and functions essentially identically to the air-to-water heat pump from FIG.
- the operating principle of the heat pump 1 with evaporator 4, compressor 5, condenser 6 and expansion valve 8 is therefore not described again.
- the air-to-air heat pump 1 does not transfer its heat to water at the condenser 6 but to air as the heat transfer medium.
- the air flows through a large number of ventilation ducts L, which are shown here in Fig.
- a pump or fan 7 sucks in outside air or fresh air.
- the fresh air flows through a heat exchanger W.
- the heat exchanger W can also be designed in such a way that room air and outside air are mixed, or that fresh outside air is used directly as supply air for rooms 11, 12.
- heat is transferred from warm exhaust air from a room 11, 12 to fresh outside air at the heat exchanger W. Heat remaining in the exhaust air can be used on the evaporator to heat the coolant of the heat pump 2 .
- heat is transferred from the refrigerant to the supply air in the ventilation duct (flow duct). Additional heating of the supply air can take place on heater register 2.
- the arrangement shown of the heating register 2 in the supply air duct (flow duct), with the heating register 2 being connected downstream of the heat exchanger W, is referred to as a post-heating register.
- a preheating register can be arranged in front of the heat exchanger W in the supply air duct for outside air, which can serve to prevent the heat exchanger W from icing up.
- Another fan 7 is arranged in a ventilation duct or return duct and generates an air flow for discharging exhaust air from a room 11, 12.
- the exhaust air flows through the heat exchanger W and can transfer heat to the sucked-in outside air.
- the Exhaust air are discharged directly to the outside as exhaust air, where it flows through the evaporator 4.
- Fig. 3 shows a schematic representation of a ventilation system 100 for a building with a heat pump 1 according to the invention.
- a control device 10 of the ventilation system 100 controls an operating state of the heat pump 1 and monitors operating parameters of the heat pump 1.
- the control device 10 detects an outside temperature of the building via an outside temperature sensor 13 .
- a division of the heat pump 1 into an external unit and an internal unit is not shown in FIG. 3 .
- the heat pump 1 can be divided as shown in FIG. 1 or FIG. 2 or can be designed as a monoblock device. From the heat pump 1, two flow channels VL1 and VL2 go out.
- the first flow duct VL1 can, for example, lead to at least a first room 11 for heating the building.
- the second flow channel VL2 can lead to a second space 12 accordingly.
- the control device 10 is communicatively connected to a server 20 and a cloud 30 via a network 40 .
- at least one terminal T for example a smartphone or a laptop or another device, can be communicatively connected to server 20, cloud 30 and control device 10 via network 40.
- the control device 10 the server 20, the cloud 30 and the terminal T each have suitable communication interfaces, the details of which are not described in more detail.
- the heat pump 1 with flow channels VL1, VL2 and return channel RL and the consumers 11, 12, the control device 10, the server 20, the cloud 30, the network 40, the terminal T and the outside temperature sensor 13 belong to the ventilation system 100, although not all components essential for the operation of the Ventilation system 100 are.
- the outside temperature can also be transmitted from the server 20 via the network 40 to the control device 10 instead of from an outside temperature sensor 13 .
- the server 20 and/or the cloud 30 serve as a memory and/or computing device for storing and evaluating data which are recorded and transmitted by the control device 10 .
- the control device 10 detects and transmits operating parameters of the heat pump 1, including a running time and a power consumption of the heating register 2.
- the control device 10 can also receive control parameters from the server 20 or the cloud 30, so that a control-related intervention in the operation of the heat pump can take place can.
- a method according to the invention for operating the heat pump 1 according to the invention in the ventilation system 100 according to the invention is described below with reference to a flow chart shown in FIG. 4 .
- the aim of the method is to detect undesired operation of the heating register 2 and to avoid it as far as possible or to enable measures to be taken to avoid the operation of the heating register 2 .
- a first step S1 an outside temperature of the building is recorded.
- the detected outside temperature is compared with a predetermined limit temperature.
- the limit temperature can be specified, for example, as a function of a geographic location at which heat pump 1 is operated and/or as a function of a device type and a design of heat pump 1 .
- the limit temperature is a temperature below the freezing point.
- the limit temperature can be in a range between -15°C and -5°C.
- a term of the electric heater 2 and energy consumed by heating register 2 is recorded.
- the running time and the energy consumption are recorded over a defined period of time, which can generally be several hours or, for example, a day.
- the defined period of time can begin with a warm-up phase in the early morning and last 24 hours.
- the example below assumes a fixed period of one day (24 hours) that begins at 6:00 a.m.
- the acquisition can take place continuously at regular time intervals over the defined period of time, for example every minute or even several times per minute.
- the recorded data can be transmitted from the control device 10 to the server 20 and/or the cloud 30 via the network 40 .
- the recorded values of the outside temperature, the running time of the heating register 2 and the energy consumed by the heating register 2 (or the current power consumption of the heating register 2) can be transmitted from the control device 10 via the network 40 to the cloud 30 and/or the server 20 be transmitted.
- step S2 If the outside temperature is lower than the limit temperature (NO in step S2), the method goes back to step S1. In this case, the running time and the energy consumption of the heating register 2 are not monitored using the method according to the invention. In this case, it may be necessary or desirable to operate the heating register 2 .
- the running time and the energy consumption are evaluated in the defined period of time.
- the transmitted runtime data points can be integrated over the defined period of time in order to calculate the runtime of an entire day.
- the energy consumption can be calculated accordingly, with, for example, individual transmitted data points that indicate a current power consumption of the heating register 2 being evaluated in order to calculate a total energy consumption of the heating register in the defined period of time.
- Steps S2 and S3 and the next steps S4, S5 and S6 can be carried out by the control device 10, the server 20 or the cloud 30. In the following steps S4 and S5, the calculated total values of the running time and the energy consumption in the specified period are compared with respective limit values.
- step S4 it is determined whether the running time exceeds a first limit value in the specified period. If this is the case (YES in S4), the method continues with step S5. If the first limit value is not exceeded (NO in S4), the daily running time of the heating register 2 is in the permitted range and the method goes back to the first step S1.
- step S5 it is determined whether the energy consumed by the heating register 2 in the defined period of time exceeds a second limit value. If this is the case (YES in S5), the method continues with step S6. If the second limit value is not exceeded (NO in S5), the daily consumed energy of the heating register is in the permitted range and the method goes back to the first step S1.
- a message is generated and issued.
- the message can be a warning, for example, which indicates that the running time of the heating register 2 exceeds the first limit value and/or that the energy consumption of the heating register 2 exceeds the second limit value.
- the message can also indicate whether heating register 2 is currently in operation.
- the message or warning can be output by the control device 10 or by the server 20 or the cloud 30 to a terminal T of a user of the heat pump 1 that is communicatively connected to the network 40 .
- the message can be output via a display device of the control device 10 .
- the comparisons with the first limit value and the second limit value in steps S4 and S5 depend on each other in the present example. In other words, both the first limit and the second limit must be exceeded (YES in S4 AND S5) before the message is generated and issued in S6.
- the method according to the invention is not limited to this. The method can also be carried out in such a way that exceeding just one of the two limit values (YES in S4 OR YES in S5) can be sufficient to generate and output the message in S6.
- step S6 Determines control parameters for the operation of the heat pump 1 and the heating coil 2, and the optimized control parameters are transmitted via the network 40 to the control device 10 of the heat pump 1.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Computer Hardware Design (AREA)
- Central Heating Systems (AREA)
- Air Conditioning Control Device (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102021133511.6A DE102021133511A1 (de) | 2021-12-16 | 2021-12-16 | Verfahren zum betreiben einer wärmepumpe |
| PCT/EP2022/085283 WO2023110698A1 (de) | 2021-12-16 | 2022-12-12 | Verfahren zum betreiben einer wärmepumpe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4449027A1 true EP4449027A1 (de) | 2024-10-23 |
Family
ID=84799964
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP22835637.4A Pending EP4449027A1 (de) | 2021-12-16 | 2022-12-12 | Verfahren zum betreiben einer wärmepumpe |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20250020336A1 (de) |
| EP (1) | EP4449027A1 (de) |
| DE (1) | DE102021133511A1 (de) |
| WO (1) | WO2023110698A1 (de) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5752654A (en) * | 1996-03-04 | 1998-05-19 | The Comfort Guardian, Inc. | Method and apparatus for providing supplemental heating |
| US5967411A (en) | 1998-01-23 | 1999-10-19 | Carrier Corporation | Method and apparatus for controlling supplemental heat in a heat pump system |
| JP6052675B2 (ja) * | 2013-04-25 | 2016-12-27 | パナソニックIpマネジメント株式会社 | ヒートポンプシステム制御装置、ヒートポンプシステム、および、ヒートポンプシステム制御方法 |
| DE102020215669A1 (de) | 2020-12-10 | 2022-06-15 | Viessmann Climate Solutions Se | Verfahren zum betreiben einer wärmepumpe |
-
2021
- 2021-12-16 DE DE102021133511.6A patent/DE102021133511A1/de active Pending
-
2022
- 2022-12-12 EP EP22835637.4A patent/EP4449027A1/de active Pending
- 2022-12-12 WO PCT/EP2022/085283 patent/WO2023110698A1/de not_active Ceased
- 2022-12-12 US US18/715,812 patent/US20250020336A1/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| US20250020336A1 (en) | 2025-01-16 |
| WO2023110698A1 (de) | 2023-06-22 |
| DE102021133511A1 (de) | 2023-06-22 |
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