EP4565792A1 - Pumpvorrichtung für ein kraftfahrzeug - Google Patents
Pumpvorrichtung für ein kraftfahrzeugInfo
- Publication number
- EP4565792A1 EP4565792A1 EP23748795.4A EP23748795A EP4565792A1 EP 4565792 A1 EP4565792 A1 EP 4565792A1 EP 23748795 A EP23748795 A EP 23748795A EP 4565792 A1 EP4565792 A1 EP 4565792A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- fluid
- sensor
- sensor unit
- fluid channel
- cooling fluid
- 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
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/58—Cooling; Heating; Diminishing heat transfer
- F04D29/5806—Cooling the drive system
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D13/00—Pumping installations or systems
- F04D13/02—Units comprising pumps and their driving means
- F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D13/00—Pumping installations or systems
- F04D13/02—Units comprising pumps and their driving means
- F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
- F04D13/0686—Mechanical details of the pump control unit
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04007—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids related to heat exchange
- H01M8/04029—Heat exchange using liquids
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
- H01M8/04313—Processes for controlling fuel cells or fuel cell systems characterised by the detection or assessment of variables; characterised by the detection or assessment of failure or abnormal function
- H01M8/0432—Temperature; Ambient temperature
- H01M8/04358—Temperature; Ambient temperature of the coolant
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
- H01M8/04694—Processes for controlling fuel cells or fuel cell systems characterised by variables to be controlled
- H01M8/04746—Pressure; Flow
- H01M8/04768—Pressure; Flow of the coolant
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
- H02K11/25—Devices for sensing temperature, or actuated thereby
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P5/00—Pumping cooling-air or liquid coolants
- F01P5/10—Pumping liquid coolant; Arrangements of coolant pumps
- F01P5/12—Pump-driving arrangements
- F01P2005/125—Driving auxiliary pumps electrically
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
- F01P5/00—Pumping cooling-air or liquid coolants
- F01P5/10—Pumping liquid coolant; Arrangements of coolant pumps
- F01P5/12—Pump-driving arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D13/00—Pumping installations or systems
- F04D13/02—Units comprising pumps and their driving means
- F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
- F04D13/0606—Canned motor pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
- F04D15/0088—Testing machines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2240/00—Components
- F05D2240/60—Shafts
- F05D2240/61—Hollow
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2250/00—Fuel cells for particular applications; Specific features of fuel cell system
- H01M2250/20—Fuel cells in motive systems, e.g. vehicle, ship, plane
Definitions
- the invention relates to a pump device, such as an oil pump, a water pump or the like, for a motor vehicle or for a cooling device of a motor vehicle, in particular a fuel cell system, and for conveying cooling fluid, in particular oil, water or cooling water or the like.
- the invention further relates to such a motor vehicle, such a cooling device, and a motor vehicle with such a cooling device and/or with a fuel cell system.
- Such pump devices can be designed in various ways, for example as a centrifugal pump, gerotor pump, rotary vane pump or the like.
- the invention also relates to a method for determining a measured variable, in particular a fluid temperature, which characterizes a cooling fluid in a pump device according to the invention.
- waste heat-generating components of a motor vehicle for example its drive train, in particular a fuel cell system
- the cooling fluid can be cooled by the resulting waste heat being absorbed and transported away by the cooling fluid.
- electrical or electronic components of the motor vehicle that generate waste heat can also be cooled using the cooling fluid.
- cooling fluid is typically circulated in a cooling circuit.
- a pump device is typically used to drive or convey the cooling fluid in the cooling circuit.
- various parameters or measured variables such as the fluid temperature of the coolant fluid delivered, the fluid pressure of the coolant fluid delivered, the mass flow delivered and thus the delivery capacity of the pump device and/or the electrical conductivity of the pump device Know the cooling fluid as accurately as possible.
- suitable sensors can be provided in the cooling circuit.
- Such sensors are usually arranged along the cooling circuit in contact with the cooling fluid.
- DE102009005154A1 discloses a pump device with various sensors for detecting measured variables.
- DE1983928U discloses a pump device with a temperature sensor arranged in the cooling fluid in the pump device.
- US 2015/093253 A1 discloses a pumping device for fresh water module systems and a method for detecting a fluid temperature of a medium conveyed by the pumping device by measuring thermal radiation using a temperature sensor. Based on the recorded heat radiation, the fluid temperature of the pumped medium is determined using an external calculation.
- the method requires the temperature sensor to be located outside of the cooling fluid.
- this method and the arrangement required for it are also complex and may be unsuitable for motor vehicle applications, since special conditions apply to motor vehicle applications with regard to accuracy, robustness and reliability. A quick, reliable determination of the fluid temperature of a cooling fluid is often required.
- an object of the present invention may be required to detect a change in the fluid temperature of the cooling fluid of 50 K within a maximum of 30 seconds, in particular a maximum of 15 seconds, in particular a maximum of 7 seconds. It is therefore an object of the present invention to provide an improved embodiment of a known pump device in which at least one of said disadvantages is partially or even completely eliminated. In particular, an object of the present invention is to provide a pump device that is compact and robust and at the same time enables reliable detection of at least one of the measured variables, in particular a fluid temperature of the cooling fluid.
- a basic idea of the invention is therefore a pump device for a motor vehicle, which can be arranged in a cooling circuit for circulating cooling fluid, with a sensor unit with at least one sensor, in particular with at least two sensors, for determining one or more measured variables characterizing the cooling fluid, in particular for determining two measured variables that characterize the cooling fluid. Since the cooling fluid to be circulated in the cooling circuit must necessarily be guided through a fluid channel provided in the pump device in order to convey it, it is proposed to integrate said sensor unit directly into the pump device. In this way, installation space can be saved.
- the pump device it is possible to use electrical components that are already installed in the pump device, such as a circuit board with electrical/electronic components arranged thereon or a circuit board arrangement (PCBA), for the electrical control or electrical energy supply of the sensor unit.
- An electrical power supply for supplying the electrical drive unit and/or other electrical/electronic components, in particular a control/regulating device, of the pump device with electrical energy can be used at the same time to supply the sensor unit with electrical energy.
- a control device for controlling the electric drive unit can simultaneously control the sensor unit and/or for processing the respective measured variable detected by the sensor unit can be used. This enables the construction of the pump device to be significantly simplified. The result is significant cost advantages.
- the pump device according to the invention can in principle also be suitable for applications whose object is not or at least not primarily the cooling of components that generate waste heat.
- the cooling fluid can therefore also be generally understood as a fluid or liquid.
- the pump device for conveying cooling fluid, in particular water, oil, cooling water or the like, comprises a housing in which a fluid channel through which the cooling fluid to be conveyed can flow is arranged.
- the fluid channel can be designed, for example, as a water channel for water or cooling water as a cooling fluid or as an oil channel for oil as a cooling fluid.
- the pump device further comprises a drive unit for driving the cooling fluid guided through the fluid channel.
- the pump device comprises an electrical sensor unit, which comprises at least one sensor for determining at least one measured variable that characterizes the cooling fluid, in particular a thermodynamic measured variable, such as a fluid temperature.
- the sensor unit is at least partially arranged in the fluid channel.
- the sensor unit with the at least one sensor projects into the fluid channel. This enables rapid and comparatively immediate detection of changes in the characteristic properties of the cooling fluid.
- the at least one sensor of the sensor unit is arranged outside the fluid channel, alternatively or in addition to the arrangement according to the first aspect of the invention.
- the sensor is coupled to the fluid channel in a heat-conducting manner.
- the sensor is coupled in a heat-conducting manner to a fluid channel wall of the fluid channel.
- the fluid channel wall limits a space of the fluid channel through which the cooling fluid can flow in the area of the sensor.
- the at least one sensor is designed as a temperature sensor. This means that the sensor can be used to determine the fluid temperature of the cooling fluid guided through the fluid channel.
- the temperature sensor if coupled to the fluid channel in a heat-conducting manner, is heated through the heat-conducting coupling in accordance with the fluid temperature.
- the fluid channel wall can, in particular, be predominantly made of metal.
- the fluid channel wall may contain metal and/or metal oxide, such as zinc oxide, silicon carbide or the like.
- the fluid channel wall is preferably made of stainless steel.
- the fluid channel wall is non-magnetic or only has paramagnetic or diamagnetic properties.
- the fluid channel wall is preferably made of stainless steel.
- the fluid channel wall can be made of plastic with filler to ensure good thermal conductivity. Metal/oxide or the aforementioned materials, for example, can be considered as fillers. Since metal-containing materials have good thermal conductivity, heat transfer from cooling fluid to the fluid channel wall and heat transfer from the fluid channel wall to the temperature sensor can be improved.
- the senor and a fluid channel wall of the fluid channel are spaced apart from one another by less than 10 mm, in particular by less than 5 mm, in particular by less than 3 mm, in particular by less than 0.5 mm, in particular by less than 0.35 mm . If the sensor is arranged as close as possible to the fluid channel, good heat conduction is ensured.
- the entire sensor unit is preferably arranged in the housing of the pump device outside the fluid channel, whereby the sensor unit is better protected.
- the fluid channel wall has an external recess in which the sensor, in particular the sensor unit, is at least partially arranged.
- the sensor unit is preferably at least 50%, in particular at least 70%, in particular completely embedded in the recess.
- the depression has a depth of at least 2 mm, in particular 3 mm to 5 mm, in particular a maximum of 7 mm, in particular a maximum of 4 mm.
- the outside depression can be designed as an embossing of the fluid channel wall towards its inside, in particular deep-drawn.
- the sensor or the sensor unit is particularly preferably pressed in the recess against the fluid channel wall.
- the fluid channel wall can have a corresponding inside projection.
- the inside of the fluid channel wall is the side of the fluid channel wall that delimits the space of the fluid channel through which the cooling fluid can flow.
- the fluid channel wall is designed in one piece, in particular as a sheet metal component or injection molded part.
- the senor By providing the best possible heat-conducting coupling between the sensor and the fluid channel or its fluid channel wall, the sensor can be arranged outside the fluid channel and still enables a good determination of the fluid temperature.
- An arrangement outside the fluid channel in the housing of the pump device enables, in addition to better protection of the sensors, also a simpler connection to other electrical/electronic components of the pump device, such as a control/regulation device.
- the invention also includes advantageous embodiments in which the sensor unit in its entirety has the features mentioned above for the sensor or temperature sensor with regard to its arrangement relative to or its interaction with the fluid channel.
- the heat-conducting coupling can be improved by connecting the sensor and the fluid channel, in particular the fluid channel wall, in a heat-conducting manner by a heat-conducting layer, in particular a heat-conducting paste and/or a gap filler and/or a heat-conducting pad.
- the fluid channel preferably has two channel regions arranged one after the other along a flow path of the cooling fluid in the fluid channel.
- the flow path describes the path of a fluid particle of the cooling fluid through the fluid channel via a location in the fluid channel closest to the sensor unit.
- One of the channel areas is designed to guide cooling fluid towards the sensor unit and another of the channel areas is designed to guide cooling fluid directed towards the sensor unit away from the sensor unit.
- cooling fluid is conveyed through both channel areas one after the other.
- the fluid channel regions are aligned such that cooling fluid coming from one of the fluid channel regions flows against the fluid channel wall before entering the other fluid channel region.
- the fluid channel wall is preferably designed to redirect cooling fluid from one of the channel areas to enter the other of the channel areas, which improves the flow.
- the fluid channel is designed to deflect the cooling fluid along the flow path at the level of the sensor unit or the at least one sensor, in particular by at least 30°, in particular by at least 90°, in particular by at least 120°, in particular by less than 160° on a respective orientation of the flow path immediately before and after the deflection, which creates advantageous flow conditions for heat transfer during operation of the pump device in the deflection area.
- the fluid channel thus specifies a flow path for cooling fluid from one of the channel regions towards the fluid channel wall and from the fluid channel wall through the other of the channel regions.
- a preferred Continuous flow improves the heat transfer of cooling fluid to the fluid channel or fluid channel wall, so that fluid temperature changes in the cooling fluid can be easily detected.
- the drive unit of the pump device comprises a rotatable drive shaft on which a pump rotor for conveying the cooling fluid in the fluid channel is arranged in a rotationally fixed manner.
- the pump rotor can be designed, for example, as an impeller, gear, gerotor, eccentric or eccentric screw, rotary valve or the like.
- the pump device comprises an electrical machine with a stator and a rotor for driving the drive shaft.
- the stator is arranged in a stationary manner relative to the housing, while the rotor is connected to the drive shaft in a rotationally fixed manner, so that a relative rotational movement can take place between the rotor and stator.
- the rotor is preferably designed to be permanent magnetic.
- the drive shaft can be rotatably arranged on the housing or another component of the pump device that is arranged stationary to the housing by means of suitable bearing elements.
- the pump device has a wet area and a dry area sealed in a fluid-tight manner from the wet area. This prevents liquid, in particular the cooling fluid, from reaching the wet area into the dry area.
- the rotor of the electrical machine is arranged in the wet area and the stator of the electrical machine is arranged in the dry area. Such so-called wet runners are known to those skilled in the art.
- the fluid channel runs in the wet area of the pump device. Further components required to convey the cooling fluid can each be arranged in the wet area.
- the temperature sensor which is arranged outside the fluid channel and is thermally conductively coupled to the fluid channel, is arranged in the dry area.
- the pump device preferably has a containment shell which fluid-tightly separates the dry area and the wet area.
- the fluid channel wall is preferably formed at least in sections by the containment can.
- the containment pot is particularly made of Metal, with non-magnetic materials being preferred in order to avoid adverse interactions with permanent and/or electromagnetic components.
- the fluid channel runs in sections in the axial direction in an area radially between the stator and the rotor, in each case relative to an axis of rotation of the rotor.
- the drive shaft and/or the rotor of the electric machine each delimit at least one channel area.
- the pump device is designed to be particularly integrated and the cooling fluid can also be used to cool rotating parts of the pump device. This can be further improved by one of the channel areas running between the rotor and stator and/or the other channel area running through the rotor.
- the drive unit comprises a control device for controlling the electrical machine with stator and rotor.
- the control and control device is preferably arranged in the dry area of the pump device.
- the control and control device comprises an electrical circuit board on which at least one electrical/electronic component is arranged.
- These components can be, for example, sensors, capacitors, coils, resistors, switches, in particular semiconductor switches, and integrated circuits.
- the sensor unit is electrically connected to the circuit board. In this way, the sensor unit can be controlled directly via the circuit board or with the help of the electrical/electronic components arranged on the circuit board. Separate electrical wiring of the sensor unit to the outside is therefore not necessary; Rather, the complete electrical control of the sensor unit can take place via said circuit board.
- the sensor unit can also be arranged on the circuit board.
- the sensor unit can therefore be designed as an SMD component, for example.
- the sensor unit and circuit board are then part of a printed circuit board assembly (PCBA).
- PCBA printed circuit board assembly
- the sensor unit can thus be used in the course of Production of the pump device can be pre-assembled or pre-assembled directly on the circuit board.
- the provision of electrical connecting lines between the circuit board and the sensor unit can be omitted, which results in both installation space and cost advantages.
- the circuit board is preferably connected in a heat-conducting manner to the fluid channel wall, in particular directly, by means of the heat-conducting layer.
- the fluid channel wall, heat-conducting layer and circuit board are stacked one on top of the other.
- Electrical components of a circuit board arrangement are generally preferably arranged at least predominantly on one side of the circuit board in order to simplify production.
- the at least one sensor in particular the sensor unit, is therefore preferably arranged on the side of the circuit board facing away from the fluid channel.
- Preferably, more than 50%, in particular more than 85%, in particular all, of all electrical/electronic components arranged on the circuit board are arranged on the side of the circuit board facing away from the fluid channel. By arranging as many components as possible on this one side facing away from the fluid channel, the circuit board can be arranged closer to the fluid channel.
- the circuit board When the pump device is operated, the circuit board can heat up due to electrical resistance, for example from electrical/electronic components and conductor tracks or integrated circuits of the circuit board.
- the circuit board or the circuit board arrangement represents a heat source.
- This self-heating can influence the determination of the measured variable, in particular the fluid temperature.
- a further temperature sensor for detecting a circuit board temperature is therefore arranged on the circuit board.
- the sensor unit and the further temperature sensor are spaced apart and interact in such a way that when determining the measured variable that characterizes the cooling fluid, an influence is exerted Self-heating of the circuit board on the measured variable can be taken into account or taken into account by comparing it with the circuit board temperature detected by the further temperature sensor.
- a heat-conducting coupling of the further temperature sensor to the fluid channel is kept negligibly low.
- the further temperature sensor is arranged radially with respect to an axis of rotation of the rotor next to the fluid channel wall without overlapping.
- the circuit board is spaced from the fluid channel wall by a gap at the level of the further temperature sensor. This ensures that a thermally conductive coupling of the circuit board with the fluid channel takes place outside the location at which the further temperature sensor is arranged.
- the self-heating can, in particular additionally, be taken into account in a different way when evaluating a signal from the sensor of the sensor unit to determine the measured variable.
- a power consumption of the circuit board arrangement i.e. of the circuit board and electrical/electronic components arranged thereon, is recorded by a controller on the circuit board and a difference value correlating thereto is subtracted from the signal of the at least one sensor. If the sensor is designed as a temperature sensor, the power consumption of the circuit board arrangement can be recorded using a controller and a correlating difference value can be subtracted as a difference temperature from the signal detected by the temperature sensor. As a result, the accuracy of the temperature measurement is further approximated compared to arranging the sensor directly in the cooling fluid.
- the circuit board is pressed, in particular directly, against the fluid channel wall of the fluid channel. This improves the heat conduction between the fluid channel and the temperature sensor arranged on the circuit board.
- a heat-conducting layer can therefore be dispensed with.
- the at least one sensor of the sensor unit is arranged on the side of the circuit board facing the fluid channel, which improves the heat-conducting coupling of the sensor and fluid channel. In addition, this ensures that the sensor or the sensor unit can be arranged in the recess of the fluid channel wall, which also contributes to a compact design. In particular, the sensor or the sensor unit is pressed against the fluid channel wall.
- the sensor unit can be electrically connected to the circuit board by means of at least one insulation displacement connection or by means of at least one plug connection. This makes it easier to dismantle the sensor unit from the circuit board if necessary.
- the control device can include an electrical power supply for supplying the electrical machine with electrical energy.
- the sensor unit is electrically connected to this electrical power supply for supplying the at least one sensor with electrical energy. This means that there is no need to provide a separate electrical connection for the sensor unit with such a power supply. Rather, the sensor unit can be supplied with electrical energy via the electrical power supply of the control unit. This simplifies the electrical wiring of the sensor unit considerably, which also results in noticeable cost advantages.
- control and control device comprises a communication unit for communicating with an external field bus, in particular with a LIN or CAN bus of a motor vehicle.
- the sensor unit for reading out or controlling the at least one sensor is electrically or data-transmittingly connected to the controller and/or the communication unit. This enables flexible control or flexible reading of the sensor unit from outside via said sensor unit Fieldbus without the need for a separate communication unit.
- the sensor unit can be used to control or read out
- Communication unit of the control system can also be used.
- the temperature measured by a sensor and a phase current of the electrical machine determined by the control and control device, and in particular a speed of the pump rotor are by means of a correlation of pressure, temperature and phase current, and in particular speed, stored in the control and control device.
- to process, in particular to process in the control and control device to calculate a pressure of the cooling fluid.
- the pump device is also set up to transmit data on the calculated pressure via the control and control device, in particular the communication unit for communicating with the external fieldbus.
- the pump device is designed to measure a temperature and a speed of the pump rotor measured by the temperature sensor as at least one sensor, and in particular a phase current of the electrical machine determined by the control and control device, by means of a correlation of pressure stored in the control and control device , temperature and phase current, and in particular speed, to be processed, in particular to be processed in the control and control device, for calculating a mass flow and Z or volume flow of the cooling fluid.
- the pump device is also set up to transmit data on the calculated mass flow or volume flow via the control and control device, in particular the communication unit for communicating with an external fieldbus.
- the sensor unit can have at least two of the sensors explained below.
- a sensor can be a pressure sensor for determining the fluid pressure of the cooling fluid guided through the fluid channel. This makes it possible to determine exactly the pressure at which the cooling fluid is pumped by the pump device.
- Another sensor of the sensor unit can be a temperature sensor for determining the cooling fluid temperature of the cooling fluid guided through the fluid channel. The fluid temperature of the cooling fluid guided through the fluid channel can thus be determined very precisely.
- a further sensor of the sensor unit can be a mass flow sensor for determining the mass flow of cooling fluid through the fluid channel. In this way, the current delivery rate of the cooling fluid delivered by the pump device can be precisely determined.
- a further sensor of the sensor unit can comprise an electrical conductivity sensor for determining the electrical conductivity of the cooling fluid guided through the fluid channel. This means that the electrical conductivity of the cooling fluid can also be precisely determined. Precise knowledge of the electrical conductivity of the cooling fluid can prove to be advantageous if the fluid channel is delimited by metal components, since the cooling fluid with too high an electrical conductivity could then cause an electrical short circuit.
- the sensor unit comprises a sensor housing in and/or on which the at least one sensor is arranged. Furthermore, in this development, at least one sensor and the sensor housing are designed as a structural unit, in particular as an SMD structural unit. This embodiment is particularly compact and can also be mounted particularly easily and in a space-saving manner in the housing of the pump device.
- the drive shaft is designed as a, preferably hollow cylindrical, hollow shaft which surrounds a, preferably cylindrical, cavity which forms part of the fluid channel.
- the cavity thus serves as a passage for the cooling fluid.
- the flow path of the cooling fluid runs through the drive shaft.
- One of the channel areas particularly preferably runs through the hollow shaft to the pump rotor.
- the sensor unit is preferably arranged in an axial extension of the cavity in the fluid channel. This ensures a reliable flow in the area of the sensor unit.
- the rotor has an axial passage to the pump rotor.
- the cooling channel runs through this passage.
- the flow path of the cooling fluid can thus run through the rotor.
- one of the two channel areas runs through the passage of the rotor to the pump rotor.
- the passage is preferably formed radially between a holding section and a magnet section which is radially spaced from the holding section. Holding section and magnet section are rigidly connected to one another, in particular by overmolding with a plastic.
- the rotor is attached to the drive shaft by means of the holding portion.
- the rotor is designed to be permanently magnetic, at least in the magnet section, in particular in such a way that at least one permanent magnet is arranged in the magnet section.
- the rotor thus forms part of the fluid channel between the magnet section and the holding section. This enables better integration of the cooling channel and at the same time allows the rotor to be effectively cooled using cooling fluid.
- the pump device can have a delivery geometry along the fluid channel, which enables a higher flow rate.
- the conveying geometry interacts effectively with cooling fluid to convey cooling fluid.
- at least one conveying geometry is formed in the hollow shaft.
- the conveying geometry interacts with cooling fluid in such a way that cooling fluid is conveyed through the hollow shaft.
- the rotor can have at least one conveying geometry, particularly in the passage.
- the delivery geometry interacts with cooling fluid in such a way that cooling fluid is delivered through the rotor and/or past the rotor.
- Such delivery geometries are also conceivable in other areas, in particular in the first and/or second channel area, of the fluid channel.
- a sealing device is arranged axially between the pump rotor and the rotor for the sealing connection of the rotor to the housing.
- the sealing device is preferably designed as a labyrinth seal.
- the sealing device provides a sealing gap between the rotor and the housing.
- the sealing gap ensures a sealing connection and, on the other hand, allows the rotor to move as intended relative to the housing to drive the drive shaft.
- the sealing device has a first sealing part that is rigidly, in particular integrally, connected to the rotor and a second sealing part that is rigidly, in particular integrally, connected to the housing.
- the sealing gap is formed between the sealing parts.
- the housing can be formed at least in two parts, preferably in three parts, with a main housing body in which the drive unit is arranged, and with at least one, preferably two, housing cover(s).
- the at least one housing cover is releasably attached to the housing body, preferably by means of at least one screw connection.
- the sensor unit preferably also the circuit board, is firmly connected to a housing cover.
- the sensor unit can be mounted on the pump device during the assembly of the housing cover on the housing main body and the sensor unit can also be pre-assembled on the housing cover. This simplifies the assembly of the pumping device.
- the invention further relates to a cooling device for a fuel cell system of a motor vehicle.
- the cooling device comprises a cooling circuit for circulating cooling fluid, in particular water or cooling water, and a pump device according to the invention arranged in the cooling circuit for conveying the cooling fluid in the cooling circuit.
- the advantages of the pump device according to the invention explained above are therefore transferred to the cooling device according to the invention.
- the invention further relates to a motor vehicle with a pump device according to the invention, wherein the motor vehicle comprises a drive train with a component that generates waste heat and is thermally coupled to the cooling device, so that the waste heat generated can be transferred to the cooling fluid circulating in the cooling circuit.
- the component that generates waste heat can be, for example, an electric motor, an internal combustion engine or a fuel cell.
- the Motor vehicle according to the invention can include features that are described above in connection with the pump device according to the invention.
- the invention also relates to a motor vehicle with a cooling device according to the invention explained above.
- a cooling device according to the invention explained above.
- the advantages of the pump device according to the invention explained above are therefore transferred to the motor vehicle according to the invention.
- this includes a fuel cell system that generates waste heat and is thermally coupled to the cooling device, so that the waste heat generated can be transferred to the cooling fluid circulating in the cooling circuit.
- the invention also relates to a method for determining a measured variable, in particular a thermodynamic measured variable, in particular a fluid temperature, which characterizes a cooling fluid in a pump device according to the invention.
- the cooling fluid is guided in a fluid channel towards a sensor unit. From the cooling fluid guided in the direction of the sensor unit, heat or thermal energy is transferred to the sensor unit by flowing against the fluid channel and via a heat-conducting coupling of the fluid channel and sensor unit.
- a sensor of the sensor unit detects the thermal energy transmitted to the sensor unit by measuring temperature, with the sensor unit preferably determining the measured variable.
- the cooling fluid directed towards the sensor unit is led away from the sensor unit.
- the cooling fluid is deflected along a flow path of the cooling fluid at the level of the at least one sensor of the sensor unit, from one channel region of the fluid channel to enter another channel region of the fluid channel.
- the method can have features that are described above in connection with the pump device, motor vehicle or cooling device. Further important features and advantages of the invention emerge from the subclaims, from the drawing and from the associated description of the figures based on the drawing.
- Fig. 1 an example of a pump device according to the first aspect of the invention in a sectional view
- Fig. 2 an exemplary embodiment of a pump device according to the second aspect of the invention in a sectional view.
- FIG 1 shows an example of a pumping device 1 according to the invention designed as a water pump in a sectional view.
- the pump device 1 serves to convey cooling fluid W, in particular water, in particular cooling water.
- the pump device 1 comprises a housing 2, in which a fluid channel 3 through which the cooling fluid W to be pumped can flow is arranged.
- the pump device 1 comprises an electric drive unit 4, which is partially arranged in the fluid channel 3 in the example according to FIG non-rotatable a pump rotor 8 designed as an impeller for conveying water as cooling fluid W is arranged in the fluid channel 3.
- the pump device 1 of the embodiment according to FIG. 1 comprises an electrical sensor unit 5 which is arranged at least partially in the fluid channel 3 and which, in the example, comprises four sensors 6a, 6b, 6c, 6d for determining one measurement variable characterizing the cooling fluid W.
- a first 6a of the four sensors 6a-6d is a pressure sensor for determining the fluid pressure of the cooling fluid W guided through the fluid channel 3. This makes it possible to determine exactly at what pressure the cooling fluid W is conveyed by the pump device.
- a second 6b of the four sensors 6a-6d of the sensor unit 5 is a temperature sensor for determining the fluid temperature of the cooling fluid W guided through the fluid channel 3. The fluid temperature of the cooling fluid W guided through the fluid channel 3 can thus be determined very precisely.
- a third 6c of the four sensors 6a-6d of the sensor unit 5 is a mass flow sensor for determining the mass flow of cooling fluid W through the fluid channel 3. In this way, the current delivery rate of the cooling fluid delivered by the pump device can be precisely determined.
- a fourth 6d of the four sensors 6a-6d of the sensor unit 5 is an electrical conductivity sensor for determining the electrical conductivity of the cooling fluid W guided through the fluid channel 3. The electrical conductivity of the cooling fluid W can thus also be determined precisely. Exact knowledge of the electrical conductivity of the cooling fluid W can prove to be particularly important if the fluid channel 3 is delimited by metal components, since the cooling fluid W could then cause an electrical short circuit if the electrical conductivity is too high.
- the sensor unit 5 can expediently be equipped with a sensor housing 17, in or on which the four sensors 6a-6d are arranged. Furthermore, in this development, the four sensors 6a-6d and the sensor housing 17 are designed as a structural unit.
- the drive unit 4 comprises an electric machine 9 with a stator 10 and with a rotor 11 for driving the drive shaft 7.
- the drive shaft 7 can, as shown in Figure 1, be designed as a hollow shaft 18 with a hollow cylindrical geometry, which surrounds a cylindrical cavity 19 on the circumference and axially is open on both sides.
- the cavity 19 forms part of the fluid channel 3.
- the sensor unit 5 with the sensors 6a-6d protrudes into the fluid channel 3 in the area of an axial extension 20 of the cavity 19.
- the stator 10 is arranged in a stationary manner relative to the housing 2, while the rotor 11 is connected to the drive shaft 7 in a rotationally fixed manner, so that a relative rotational movement takes place between the rotor 11 and the stator 10 during operation of the pump device 1.
- the rotary movement of the rotor 11 takes place about an axis of rotation D, which is identical to a central longitudinal axis M of the drive shaft 7.
- the central longitudinal axis M extends along an axial direction A.
- the drive shaft 7 can be rotatably arranged on the housing 2 or another component (not shown) of the pump device 1 that is stationary relative to the housing 2 by means of suitable bearing elements (not shown).
- the rotor 11 can be arranged in the fluid channel 3.
- the stator 10 can delimit the fluid channel 3 in that section of the fluid channel 3 in which the rotor 11 is arranged.
- the cooling fluid W flowing through the fluid channel 3 can cool both the stator 10 and the rotor 11.
- the drive unit 4 comprises a control and control device 12 for controlling the electrical machine 9.
- the control and control device 12 includes an electrical circuit board 13 on which electrical and electronic components are arranged. These components can be, for example, capacitors, coils, resistors, switches, in particular semiconductor switches, and integrated circuits (not shown).
- the sensor unit 5 is electrically connected to the circuit board 13. Therefore, the electrical control of the sensor unit 5 and its sensors 6a-6d can take place directly via the circuit board 13 or with the help of the electrical electronic components arranged on the circuit board 13. A separate wiring of the sensor unit 5 to the outside is therefore not necessary; rather, the complete electrical application of the sensor unit can via the circuit board 13.
- the sensor unit 5 is arranged directly on the circuit board 13 in the example scenario.
- the sensor unit 5 can optionally be electrically connected to the circuit board 13 by means of a suitable insulation displacement connection and by means of suitable plug connections, which simplifies any necessary dismantling of the sensor unit 5 from the circuit board 13.
- the control device 12 includes an electrical power supply 14 for supplying the electrical machine 9 with electrical energy.
- the sensor unit 5 is electrically connected to this electrical power supply 14 for supplying the at least one sensor 6 with electrical energy.
- the provision of an electrical power supply 14 and the provision of a separate electrical connection of the sensor unit 5 to such a power supply can therefore be dispensed with.
- the sensor unit 5 can be supplied with electrical energy via the electrical power supply of the control unit 12. This simplifies the electrical wiring of the electrical sensor unit 5 considerably, which also results in noticeable cost advantages.
- the control and control device 12 also includes a communication unit 15 for communicating with an external field bus (not shown), in particular a LIN or CAN bus of a motor vehicle.
- the sensor unit 5 is connected to this communication unit 15 electrically and also for data transmission for controlling the four sensors 6a-6d. This enables flexible control of the sensor unit 5 from the outside, in particular via said fieldbus, without the need for a separate communication unit. Instead, the communication unit 15 of the control device 12 can be used to control the sensor unit 5.
- the housing 2 is in three parts with a housing main body 2a, in which the drive unit 4 is arranged, and two each other opposite housing covers 2b, 2c, wherein the housing main body 2a can be arranged sandwich-like between the two housing covers 2b, 2c as shown.
- the two housing covers 2b, 2c are each detachably attached to the housing main body 2a by means of screw connections 16.
- the sensor unit 5 and also the circuit board 13 are each firmly connected to a first 2b of the two housing covers 2b, 2c.
- the sensor unit 5 can thus be pre-assembled on the first housing cover 2b during the assembly of the pump device 1. This makes it easier to assemble the pump device 1.
- FIG. 2 shows an exemplary embodiment of a pump device 1 according to the second aspect of the invention in a schematic longitudinal section representation. Since the embodiment of Figure 2 corresponds to the embodiment according to Figure 1 in terms of many features, reference is made to the above description with regard to matching features and supplemented below.
- the pump device 1 in Figure 2 is used to pump oil as cooling fluid W.
- the pump device 1 has a housing 2 with housing covers 2a, 2c and housing main body 2b, in which a fluid channel 3 with a plurality of channel areas 3a, 3b between a stator 10 and a rotor 11 of an electrical machine 9 and through an axial passage of the rotor 11 to a pump rotor 8.
- Pump rotor 8 and rotor 11 are connected in a rotationally fixed manner by a drive shaft 7.
- the pump device 1 is divided into a wet area and a dry area by a containment shell 23. Stator 10 and electrical/electronic components are arranged in the dry area.
- the fluid channel 3 runs in the wet area and the rotor 11 is arranged.
- the passage of the rotor 8 is formed radially between a holding section 111 and a magnet section 112.
- the holding section 111 is used to fasten the rotor to the drive shaft 7.
- the magnet section 112 is designed to be permanent magnetic and contains permanent magnets.
- a sealing device 21 designed as a labyrinth seal is arranged axially between the pump rotor 8 and the rotor 11 to seal an area between the rotor 11 and the housing 2 through which cooling fluid W would otherwise flow.
- the Sealing device 21 provides a sealing gap 22 through which only a negligibly small proportion of cooling fluid W can penetrate. As a result, cooling fluid W flowing through the rotor 11 is reliably guided to the pump rotor 8 without mixing significantly with cooling fluid W from other channel areas.
- the drive shaft 7 is designed as a solid shaft.
- the rotor 11 is provided with the axial passage between the holding section 111 and a magnet section 112 through which cooling fluid W can flow.
- the passage is part of the fluid channel 3.
- the invention also includes embodiments with a hollow shaft, so that the fluid channel, in particular in addition to the passage through the rotor 11, can run through the hollow shaft to the pump rotor 8.
- the pump device is designed as a gerotor pump.
- the pump rotor 8 is therefore designed as a gerotor, in particular a multi-stage one.
- the individual gerotor stages are not shown in the schematic representation.
- Multistage gerotor pumps are known and described, for example, in the German patent application DE 10 2021 214 256 A1 or the international patent application WO 00/42321 A1.
- the flow path of the cooling fluid W through a channel area 3a between rotor 11 and stator 10 is indicated by arrows.
- the pump device is designed to be essentially rotationally symmetrical in the area of the rotor 11 and stator 10, so that cooling fluid can of course flow through the rotor 11 on both sides of the axis of rotation D shown.
- the point drawn in the area of the pump rotor 8 illustrates the delivery of the cooling fluid W in the pump rotor 8 perpendicular to the axis of rotation of the pump rotor 8 from a suction side to a pressure side. Cooling fluid in the pump rotor is compressed from the suction side to the pressure side.
- the invention in general naturally also includes embodiments in which the flow path of the cooling fluid is reversed, ie the suction and pressure sides are swapped. In such embodiments, the cooling fluid flows from the pressure side through the rotor 11 or the drive shaft 7.
- the containment pot 23 forms a fluid channel wall 3c on its pot bottom.
- the fluid channel wall 3c is flowed along the flow path by the cooling fluid W when cooling fluid W is conveyed through the fluid channel 3. This results in good heat transfer from the cooling fluid to the fluid channel 3 or its fluid channel wall 3c.
- the pump device 1 further comprises a sensor unit 5. This is arranged on a side of a circuit board 13 of a control/regulation device 12 of the pump device 1 facing away from the cooling channel 3.
- the sensor unit 5 has a sensor 6 designed as a temperature sensor 61.
- a further temperature sensor 62 is arranged at a distance from this on the circuit board 13.
- the further temperature sensor 62 is preferably arranged such that a heat flow transferred by heat conduction from the fluid channel 3 to the further temperature sensor 62 amounts to a maximum of 30% of a heat flow from the fluid channel 3 to the sensor 6 of the sensor unit.
- the further temperature sensor 62 primarily detects a self-heating of the circuit board 13 that correlates with the electrical power obtained.
- the temperature sensor 61 of the sensor unit 5 serves to determine the fluid temperature of the cooling fluid W and is coupled to the fluid channel 5 in a heat-conducting manner.
- a gap filler is arranged as a heat-conducting layer 24 in contact with fluid channel 3 and circuit board 13.
- This heat-conducting layer 24 ensures good heat conduction between the fluid channel and the circuit board 13, with the sensor 6 being coupled in a heat-conducting manner as a temperature sensor via the circuit board 13 and the heat-conducting layer 24 to the fluid channel 3.
- the heat-conducting layer 24 extends over the entire containment can base.
- the circuit board 13 extends radially over the fluid channel wall 3c and the heat-conducting layer 24 beyond. Fluid channel wall 3c, heat-conducting layer 24 and circuit board 13 are connected in a heat-conducting manner over the entire area in which they each overlap.
- the quality of the heat transfer of the cooling fluid to the fluid channel 5 or the sensor 6 is significantly improved if it is ensured that cooling fluid W continuously flows against the fluid channel wall 3c.
- Sensor 6 or sensor unit 5 and fluid channel 3 are therefore coordinated in terms of their arrangement. Cooling fluid W guided through channel area 3a towards the sensor unit 5 flows against the fluid channel wall 3c with heat transfer to the fluid channel wall 3c and is deflected by it in such a way that the cooling fluid W is guided away from the sensor unit 5 or sensor 6 through channel area 3b.
- the sensor 6 is arranged at the level of the point at which the deflection takes place, so that the shortest possible path for heat transfer from the fluid channel 3 to the sensor 6 through heat conduction is provided.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102022207938.8A DE102022207938A1 (de) | 2022-08-01 | 2022-08-01 | Wasserpumpe für ein Kühlsystem eines Kraftfahrzeugs |
| PCT/EP2023/071158 WO2024028269A1 (de) | 2022-08-01 | 2023-07-31 | Pumpvorrichtung für ein kraftfahrzeug |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4565792A1 true EP4565792A1 (de) | 2025-06-11 |
Family
ID=87551163
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP23748795.4A Pending EP4565792A1 (de) | 2022-08-01 | 2023-07-31 | Pumpvorrichtung für ein kraftfahrzeug |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20260043406A1 (de) |
| EP (1) | EP4565792A1 (de) |
| CN (1) | CN119522324A (de) |
| DE (1) | DE102022207938A1 (de) |
| WO (1) | WO2024028269A1 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2025184824A1 (zh) * | 2024-03-06 | 2025-09-12 | 舍弗勒技术股份两合公司 | 电动油泵 |
Family Cites Families (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1983928U (de) | 1964-08-05 | 1968-04-18 | Lederle Pumpen & Maschf | Sicherungsvorrichtung fuer spaltrohrmotorpumpen. |
| JPS54159316U (de) * | 1978-04-28 | 1979-11-07 | ||
| DE4010049C1 (en) * | 1990-03-29 | 1991-10-10 | Grundfos International A/S, Bjerringbro, Dk | Pump unit for heating or cooling circuit - uses frequency regulator to reduce rotation of pump motor upon detected overheating |
| US5368446A (en) * | 1993-01-22 | 1994-11-29 | Copeland Corporation | Scroll compressor having high temperature control |
| US5525039A (en) * | 1993-07-21 | 1996-06-11 | Roy E. Roth Company | Hermetically sealed magnetic drive pump |
| ATE182961T1 (de) * | 1993-12-08 | 1999-08-15 | Ebara Corp | Spaltrohrmotorpumpe |
| US6195990B1 (en) | 1999-01-13 | 2001-03-06 | Valeo Electrical Systems, Inc. | Hydraulic machine comprising dual gerotors |
| EP1085210A3 (de) * | 1999-09-13 | 2004-03-31 | Siemens Aktiengesellschaft | Pumpe mit Temperatursensor im Gehäuse |
| DE10157194A1 (de) | 2001-11-23 | 2003-06-05 | Wilo Gmbh | Spaltrohrpumpe mit Sensor |
| DE10201942A1 (de) * | 2002-01-19 | 2003-07-31 | Wilo Gmbh | Temperaturfühler im Zentrum |
| DE102009005154A1 (de) | 2009-01-15 | 2010-07-22 | Wilo Se | Vorrichtung zur Verbindung einer elektromotorischen Antriebseinheit mit einer Pumpeneinheit |
| DE102009001871A1 (de) * | 2009-03-26 | 2010-09-30 | Robert Bosch Gmbh | Elektrische Kühlmittelpumpe mit integrierter Zusatzsensorik zur Prozess- und Komponentenüberwachung |
| JP5586707B2 (ja) * | 2010-12-07 | 2014-09-10 | 三菱電機株式会社 | 電力変換回路内蔵モーター、この電力変換回路内蔵モーターを搭載した流体ポンプ、この流体ポンプを搭載した空気調和機、給湯器、電力変換回路内蔵モーターを搭載した機器 |
| DE102011009192B3 (de) * | 2011-01-21 | 2012-06-28 | Continental Automotive Gmbh | Elektrische Fluidpumpe mit gekühltem Nasslaufbereich |
| EP2857691B1 (de) | 2013-10-01 | 2018-02-21 | Grundfos Holding A/S | Begrenzung der Leistung einer Pumpe in Abhängigkeit von zwei gemessenen Temperaturen |
| DK2871420T3 (en) * | 2013-11-07 | 2016-12-19 | Grundfos Holding As | Cirkulationspumpeaggregat to a heating and / or cooling system |
| CN107366624B (zh) * | 2016-05-11 | 2020-09-01 | 刘刚 | 一种电子水泵 |
| FR3112910B1 (fr) * | 2020-07-24 | 2023-04-07 | Novares France | Moteur électrique et système de motorisation pour transfert thermique |
| DE102021214256A1 (de) | 2021-12-13 | 2023-06-15 | Endter SinterTechnics GmbH & Co. KG | Gerotoreinrichtung und Pumpeneinrichtung mit Gerotoreinrichtung |
| DE102022201139A1 (de) * | 2022-02-03 | 2023-08-03 | Mahle International Gmbh | Baugruppe für eine elektrische Maschine |
-
2022
- 2022-08-01 DE DE102022207938.8A patent/DE102022207938A1/de active Pending
-
2023
- 2023-07-31 US US19/100,560 patent/US20260043406A1/en active Pending
- 2023-07-31 EP EP23748795.4A patent/EP4565792A1/de active Pending
- 2023-07-31 WO PCT/EP2023/071158 patent/WO2024028269A1/de not_active Ceased
- 2023-07-31 CN CN202380051280.6A patent/CN119522324A/zh active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| US20260043406A1 (en) | 2026-02-12 |
| WO2024028269A1 (de) | 2024-02-08 |
| CN119522324A (zh) | 2025-02-25 |
| DE102022207938A1 (de) | 2024-02-01 |
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