EP3045733A1 - Ensembles de roues motorisées - Google Patents

Ensembles de roues motorisées Download PDF

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Publication number
EP3045733A1
EP3045733A1 EP16151980.6A EP16151980A EP3045733A1 EP 3045733 A1 EP3045733 A1 EP 3045733A1 EP 16151980 A EP16151980 A EP 16151980A EP 3045733 A1 EP3045733 A1 EP 3045733A1
Authority
EP
European Patent Office
Prior art keywords
air flow
flow path
ancillary
inlet
impeller
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.)
Withdrawn
Application number
EP16151980.6A
Other languages
German (de)
English (en)
Inventor
Alan Saunders
Samuel John Gegson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Vent Axia Group Ltd
Original Assignee
Vent Axia Group Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Vent Axia Group Ltd filed Critical Vent Axia Group Ltd
Publication of EP3045733A1 publication Critical patent/EP3045733A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
    • F04D25/082—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation the unit having provision for cooling the motor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F04D25/06—Units comprising pumps and their driving means the pump being electrically driven
    • F04D25/0606—Units comprising pumps and their driving means the pump being electrically driven the electric motor being specially adapted for integration in the pump
    • F04D25/0666—Units comprising pumps and their driving means the pump being electrically driven the electric motor being specially adapted for integration in the pump a sensor is integrated into the pump/motor design
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
    • F04D27/001—Testing thereof; Determination or simulation of flow characteristics; Stall or surge detection, e.g. condition monitoring
    • 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
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
    • F04D29/4213—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps suction ports
    • 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

Definitions

  • the present invention relates to motorised impeller assemblies and methods for measuring, maintaining and adjusting the output air flow from the same.
  • the present invention relates to an air-moving system, for example, a fan system, which comprises a motorised impeller assembly and methods for measuring and controlling the output air flow from the same.
  • Impellers are used to increase the pressure and flow of a fluid.
  • impellers are used in building ventilation systems to increase air flow through a building. It is desirable to be able to control the output air flow from an impeller, for example, so that the air flow through a building ventilation system can be maintained and/or altered to a desired level.
  • the impeller used in an air-moving system may be a centrifugal impeller, such as a forward curved, radial or backward curved impeller, an axial impeller or a mixed-flow impeller.
  • a centrifugal impeller such as a forward curved, radial or backward curved impeller, an axial impeller or a mixed-flow impeller.
  • Different designs of impeller exhibit different power/flow relationships due to the system pressures created by the different impellers.
  • Forward curved impellers have a predictable power/flow relationship as compared to radial, backward curved, axial or mixed-flow impellers. For this reason, the output air flow from forward curved impellers can be predicted from the torque and speed of the drive motor. Therefore, conventionally, control of the output air flow from forward curved impellers is provided by simply monitoring and adjusting the motor speed.
  • the output air flow from other impeller designs cannot simply be determined from the speed of the drive motor, and, in order to obtain a desired output air flow, use of an air flow sensor is required to determine the output air flow, and this determination of the air flow is then used to adjust the speed of the impeller to achieve the desired output air flow. It is particularly difficult to predict the flow output from a backward curved impeller due to the particular power/flow relationship characteristic of this type of impeller design.
  • the output air flow produced by impellers other than forward curved impellers is measured using an air flow sensor which is located in the air flow path downstream or upstream of the impeller.
  • an air flow sensor which is located in the air flow path downstream or upstream of the impeller.
  • pressure sensors are used, at least two pressure sensors are provided, with one pressure sensor being located in the air flow path upstream of the impeller and another pressure sensor being located in the air flow path downstream of the impeller.
  • an impeller when required as a component in an air-moving system, for example, a fan system, fabrication of the system involves not only providing the impeller within the system, but also providing at least one sensor which must be first located and then wired to the drive motor. This arrangement makes installation and repair of the drive motor and impeller difficult.
  • An aim of the present invention is to provide a motorised impeller assembly, particularly a motorised backward curved impeller, which provides a constant and/or controllable flow.
  • Providing a motorised backward curved impeller with these features would be particularly advantageous owing to the high efficiency of backward curved impellers compared to other designs of impeller.
  • the present invention relates to a motorised impeller assembly in which the drive motor is positioned within the impeller and a sensor provides for measurement of fluid flow through the drive motor, from which the output fluid flow from the impeller is determined.
  • an air flow through the drive motor can provide for measurement of the output air flow from the impeller, and that measuring the air flow through the drive motor allows the sensor to be disposed within the drive motor, as opposed to being required to be wired externally or separately, upstream and/or downstream of the drive motor.
  • This arrangement provides a constant and/or controllable flow motorised impeller assembly which can be fitted into an air-moving system, such as a fan system.
  • This arrangement has also been found to provide for a more accurate determination of the output air flow from a forward curved impeller than possible using predictive methods.
  • the present inventors have also recognized that heat energy produced by the drive motor of a motorised impeller assembly can be used to heat air flowing through or adjacent the drive motor, and that the output air flow of the impeller assembly can be determined by measuring the difference in temperature between air entering and leaving the drive motor.
  • the present invention provides a motorised impeller assembly for delivering an air flow, the assembly comprising: a first, main air flow path having an inlet and an outlet and through which a main air flow is delivered; a second, ancillary air flow path having an inlet and an outlet and through which an ancillary air flow is delivered; an impeller which is operable to deliver the air flows through the main and ancillary air flow paths; and a motor unit which comprises a drive motor for driving the impeller, and a sensor for sensing a characteristic of the ancillary air flow as delivered through the ancillary air flow path in operation of the impeller, which characteristic is representative of a flow rate of the main air flow as delivered through the main air flow path and enables control of the delivered air flow.
  • FIGS. 1 to 3 illustrate an impeller assembly in accordance with a first embodiment of the present invention.
  • the impeller assembly comprises a housing 3, an impeller 5 which is disposed within the housing 3 and operable to deliver an air flow through the housing 3, and a motor unit 7 which is disposed within the housing 3 and operable to drive the impeller 5 to deliver the air flow through the housing 3.
  • the housing 3 defines a main air flow path 10, which has an inlet 11 through which an air flow is drawn and an outlet 15 through which air is expelled.
  • the impeller 5 is a radial flow impeller, and the air flow at the inlet 11 of the housing 3 is orthogonal to the air flow at the outlet 15 of the housing 3.
  • impeller 5 could be an axial flow impeller, and the air flow at the inlet 11 of the housing 3 is aligned with, or parallel to, the air flow at the outlet 15 of the housing 3.
  • the impeller 5 comprises a backward curved impeller.
  • the impeller 5 could be any other centrifugal impeller, such as a forward curved or radial impeller, an axial impeller or a mixed-flow impeller.
  • the motor unit 7 comprises an electrical drive motor 19 which is attached to the impeller 5 to drive the same, and a body member 21 which encloses the drive motor 19.
  • the drive motor 19 includes an outer stator 22 which has a plurality of windings 23, and an inner rotor 24, which is attached to the impeller 5 and drives the same.
  • the body member 21 is separate to the housing 3, but could form part of the housing 3 in an alternative embodiment.
  • the body member 21 includes at least one inlet 25 and at least one outlet 27 which is in fluid communication with the outlet 15 of the housing 3, and together with the drive motor 19 defines an ancillary flow path 29 through which an ancillary air flow is drawn on operation of the impeller 5.
  • the body member 21 includes a plurality of air inlets 25, which are arranged circumferentially around and in spaced relation from the rotational axis of the impeller 5.
  • the open area of the at least one inlet 25 of the body member 21 is less than 1 % of the open area of the inlet 11 of the housing 3.
  • the open area of the at least one inlet 25 of the body member 21 could be less than 0.5 %, optionally less than 0.2 % and optionally less than 0.1 % of the open area of the inlet 11 of the housing 3.
  • the body member 21 includes a flow channel 31 which defines in part the ancillary flow path 29, with one of the inlets 25 of the body member 21 defining the inlet of the ancillary flow path 29 and one of the outlets 27 of the body member 21 defining the outlet of the ancillary flow path 29.
  • the ancillary flow path 29 is defined in part by the windings 23 of the drive motor 19, whereby the ancillary air flow draws heat from the windings 23, cooling the windings 23 and causing heating of the ancillary air flow.
  • the flow channel 31 could be configured such that the ancillary flow path 29 is fluidly isolated from the drive motor 19 or at least the windings 23 of the drive motor 19.
  • the motor unit 7 further comprises a sensor 35, here a flow rate sensor, which is disposed at the ancillary air flow path 29 and measures the flow rate of the ancillary air flow flowing through the ancillary air flow path 29.
  • a sensor 35 here a flow rate sensor, which is disposed at the ancillary air flow path 29 and measures the flow rate of the ancillary air flow flowing through the ancillary air flow path 29.
  • the sensor 35 is located at the outlet 27 of the flow channel 31.
  • the senor 35 is located in opposed relation to the outlet 27 of the flow channel 31, but in an alternative embodiment could be located within the flow channel 31.
  • the senor 35 is a MEMS-based sensor, here a D6F-V03A1 or D6F-W MEMS flow rate sensor (as supplied by Omron Electronic Components Europe BV, Stevenage, UK), but could be any device that can be used to indicate or measure air flow.
  • a MEMS-based sensor here a D6F-V03A1 or D6F-W MEMS flow rate sensor (as supplied by Omron Electronic Components Europe BV, Stevenage, UK), but could be any device that can be used to indicate or measure air flow.
  • the senor 35 measures the velocity of the ancillary air flow and produces a corresponding output voltage signal, allowing the flow rate of the main air flow to be calculated by correlation with this output voltage signal.
  • the senor 35 could be a mass flow sensor which comprises a heater, such as resistor, and a temperature-measuring device, such as a thermocouple, which measures the change in temperature of the heater, which is representative of the mass flow and hence flow rate.
  • a heater such as resistor
  • a temperature-measuring device such as a thermocouple
  • the motor unit 7 further comprises a controller 41 which determines the flow rate of the delivered air flow from the velocity of the ancillary air flow as measured by the sensor 35, with the velocity of the air flow through the ancillary air flow path 29 being proportional to the air flow at the outlet 15 of the housing 3, and, by feedback control, controls the speed of the drive motor 19 in order to maintain the delivered air flow at the outlet 15 of the housing 3 at a desired, predetermined level.
  • a controller 41 which determines the flow rate of the delivered air flow from the velocity of the ancillary air flow as measured by the sensor 35, with the velocity of the air flow through the ancillary air flow path 29 being proportional to the air flow at the outlet 15 of the housing 3, and, by feedback control, controls the speed of the drive motor 19 in order to maintain the delivered air flow at the outlet 15 of the housing 3 at a desired, predetermined level.
  • the motor unit 7 comprises an output flow selector 43, which allows for adjustment by the user of the desired level of delivered air flow, and the output flow selector 43 provides an input to the controller 41.
  • Figure 4 illustrates an impeller assembly in accordance with a second embodiment of the present invention.
  • the impeller assembly of this embodiment is very similar to the impeller assembly of the first described embodiment, and thus, in order to avoid unnecessary duplication of description, only the differences will be described in detail, with like parts being designated by the like reference signs.
  • the impeller assembly of this embodiment differs in that the sensor 35 comprises first and second sensor elements 45a, b, here temperature sensor elements, which are disposed at first and second spaced locations in relation to the ancillary flow path 29, and provide for measurement of a temperature differential along the ancillary flow path 29.
  • the windings 23 of the drive motor 19 act to input heat air flowing through the ancillary air flow path 29, and the differential in the temperatures measured at first and second locations is representative of the flow rate, thus allowing for a determination of flow rate from this temperature measurement.
  • the temperature of the ancillary air flow could be increased or decreased along the ancillary flow path 29.
  • the first sensor element 45a is positioned at or near the inlet 25 of the ancillary flow path 29 and the second sensor element 45b is positioned at or near the outlet 27 of the ancillary flow path 29, thus measuring the difference in temperature of the air entering the ancillary air flow path 29 and the temperature of the air leaving the ancillary air flow path 29.
  • Figure 5 illustrates a plot showing the flow rate of the delivered air flow as a function of the temperature differential between the temperatures as measured by the first and second sensor elements 45a, b.
  • the delivered flow correlates, being substantially proportional, to the temperature differential, thus enabling the flow rate to be calculated from the temperature differential.
  • first and second sensor elements 45a, b could comprise pressure sensors, which provide for measurement of a pressure differential along the ancillary flow path 29, which is representative of the flow rate, thus allowing for a determination of flow rate from this pressure measurement.
  • Figure 6 illustrates an impeller assembly in accordance with a third embodiment of the present invention.
  • the impeller assembly of this embodiment is quite similar to the impeller assembly of the first-described embodiment, and thus, in order to avoid unnecessary duplication of description, only the differences will be described in detail with like parts being designated by like reference signs.
  • windings 23 of the drive motor 19 include a flow passage 51, having an inlet 55 and an outlet 57, which defines the ancillary flow path 29, through which the ancillary air flow is drawn on operation of the impeller 5, with the sensor 35 being located at the flow passage 51, here at the outlet 57 of the flow passage 51.
  • measurement of the flow rate at the ancillary flow path 29 allows for a determination of the delivered air flow.
  • the body member 21 could omit air inlets 25 of restricted, predetermined size, with the inlet 55 of the flow passage 51 defining the inlet of the ancillary flow path 29.
  • ancillary flow path 29 could be defined by another component part of the drive motor 19 other than the windings 23 thereof.
  • the senor 35 could be located within the flow passage 51.
  • Figure 7 illustrates an impeller assembly in accordance with a fourth embodiment of the present invention.
  • the impeller assembly of this embodiment is quite similar to the impeller assembly of the first-described embodiment, and thus, in order to avoid unnecessary duplication of description, only the differences will be described in detail, with like parts being designated by like reference signs.
  • the ancillary flow path 29 includes a centrifuge chamber 61 in which the sensor 35 is housed, which prevents any contaminants in the ancillary air flow from coming into contact with the sensor 35. In this embodiment, some, or all, of the ancillary air flow flows into the chamber 61.
  • the chamber 61 forces the air flowing thereinto to take a deviating path, here a circular path, from the sensor 35, which prevents contaminants in the ancillary air flow from coming into contact with the sensor 35.
  • the sensor 35 is positioned in the centre of the chamber 61, and the chamber 61 forces contaminant particles to the outside of the chamber 61.
  • a software algorithm could be employed to compensate for contamination.
  • the software could be configured to adjust the output of the sensor 35, which is used to determine the delivered flow rate, by a predetermined amount to compensate for a predetermined level of contamination over a predetermined period of time.
  • Figure 8 illustrates an impeller assembly in accordance with a fifth embodiment of the present invention.
  • the impeller assembly of this embodiment is quite similar to the impeller assembly of the first-described embodiment, and thus, in order to avoid unnecessary duplication of description, only the differences will be described in detail, with like parts being designated by like reference signs.
  • the motor unit 7 includes first and second ancillary flow paths 29a, b, each defined at least in part by first and second flow channels 31a, b, and in comprising first and second sensors 35a b, whereby two characteristics of the ancillary air flow can be measured in the determination of the delivered air flow.
  • These characteristics can be of the same kind, or different, such as humidity or gas concentration, for example, CO 2 concentration, in addition to temperature.
  • the senor 35 could instead be any kind of sensor, such as to measure humidity, a gas concentration or any characteristic of the ancillary air flow, for example, CO 2 concentration.
  • the sensor 35 could instead be any kind of sensor, such as to measure humidity, a gas concentration or any characteristic of the ancillary air flow, for example, CO 2 concentration.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP16151980.6A 2015-01-19 2016-01-19 Ensembles de roues motorisées Withdrawn EP3045733A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1500874.1A GB2538217B (en) 2015-01-19 2015-01-19 Motorised impeller assemblies

Publications (1)

Publication Number Publication Date
EP3045733A1 true EP3045733A1 (fr) 2016-07-20

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Family Applications (1)

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EP16151980.6A Withdrawn EP3045733A1 (fr) 2015-01-19 2016-01-19 Ensembles de roues motorisées

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EP (1) EP3045733A1 (fr)
GB (1) GB2538217B (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20200392961A1 (en) * 2019-06-17 2020-12-17 Levitronix Gmbh Fan
WO2020249168A1 (fr) * 2019-06-13 2020-12-17 Ziehl-Abegg Se Ventilateur et procédé pour déterminer un flux de fluide déplacé par ce ventilateur
DE102020205533A1 (de) 2020-04-30 2021-11-04 Mahle International Gmbh Seitenkanalverdichter zum Verdichten eines Gases
CN113915713A (zh) * 2020-07-10 2022-01-11 Lg电子株式会社 循环器及包括循环器的空气净化器
US11781559B2 (en) 2020-04-30 2023-10-10 Mahle International Gmbh Side channel compressor for compressing gas
RU2813236C2 (ru) * 2019-06-13 2024-02-08 Циль-Абегг СЕ Вентилятор и способ определения потока среды, перемещаемого вентилятором
GB2622365A (en) * 2022-09-13 2024-03-20 Dyson Technology Ltd A method of determining an airflow rate through a motor assembly of an air-moving device
WO2024099490A1 (fr) * 2022-11-10 2024-05-16 Gentherm Gmbh Ventilateur de siège de véhicule

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015219150A1 (de) * 2015-10-02 2017-04-06 Ziehl-Abegg Se Motor für Lüfter bzw. Ventilatoren, Pumpen oder Kompressoren, Verfahren zum Betrieb eines solchen Motors und Ventilatorsystem mit einem oder mehreren Motor(en)/Ventilator(en)
GB2622023A (en) * 2022-08-31 2024-03-06 Dyson Technology Ltd An air treatment apparatus

Citations (3)

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EP0626519A1 (fr) * 1993-05-17 1994-11-30 BROD & McCLUNG - PACE CO. Ventilateur radial déterminant le courant d'air
US20100178181A1 (en) * 2004-09-06 2010-07-15 Hung-Chi Chen Heat-dissipation structure for motor
US20130209218A1 (en) * 2010-06-16 2013-08-15 Sulzer Pump Solutions Ab Turbomachine

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JP2004353510A (ja) * 2003-05-28 2004-12-16 Daikin Ind Ltd 遠心送風機及び遠心送風機を備えた空気調和装置

Patent Citations (3)

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Publication number Priority date Publication date Assignee Title
EP0626519A1 (fr) * 1993-05-17 1994-11-30 BROD & McCLUNG - PACE CO. Ventilateur radial déterminant le courant d'air
US20100178181A1 (en) * 2004-09-06 2010-07-15 Hung-Chi Chen Heat-dissipation structure for motor
US20130209218A1 (en) * 2010-06-16 2013-08-15 Sulzer Pump Solutions Ab Turbomachine

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11913461B2 (en) * 2019-06-13 2024-02-27 Ziehl-Abegg Se Fan and method for determining a media flow moved by the fan
WO2020249168A1 (fr) * 2019-06-13 2020-12-17 Ziehl-Abegg Se Ventilateur et procédé pour déterminer un flux de fluide déplacé par ce ventilateur
CN113939658B (zh) * 2019-06-13 2024-03-22 施乐百有限公司 通风机和用于确定由通风机移动的介质流量的方法
CN113939658A (zh) * 2019-06-13 2022-01-14 施乐百有限公司 通风机和用于确定由通风机移动的介质流量的方法
US20220235781A1 (en) * 2019-06-13 2022-07-28 Ziehl-Abegg Se Fan and method for determining a media flow moved by the fan
RU2813236C2 (ru) * 2019-06-13 2024-02-08 Циль-Абегг СЕ Вентилятор и способ определения потока среды, перемещаемого вентилятором
CN112096632A (zh) * 2019-06-17 2020-12-18 莱维特朗尼克斯有限责任公司 风扇
US12078181B2 (en) 2019-06-17 2024-09-03 Levitronix Gmbh Fan
US20200392961A1 (en) * 2019-06-17 2020-12-17 Levitronix Gmbh Fan
DE102020205533A1 (de) 2020-04-30 2021-11-04 Mahle International Gmbh Seitenkanalverdichter zum Verdichten eines Gases
US11781559B2 (en) 2020-04-30 2023-10-10 Mahle International Gmbh Side channel compressor for compressing gas
CN113915713B (zh) * 2020-07-10 2023-08-29 Lg电子株式会社 循环器及包括循环器的空气净化器
US20220010799A1 (en) * 2020-07-10 2022-01-13 Lg Electronics Inc. Air circulator and air cleaner including air circulator
CN113915713A (zh) * 2020-07-10 2022-01-11 Lg电子株式会社 循环器及包括循环器的空气净化器
GB2622365A (en) * 2022-09-13 2024-03-20 Dyson Technology Ltd A method of determining an airflow rate through a motor assembly of an air-moving device
WO2024057179A1 (fr) * 2022-09-13 2024-03-21 Dyson Technology Limited Procédé de détermination d'un débit d'air à travers un ensemble moteur d'un dispositif de déplacement d'air
WO2024099490A1 (fr) * 2022-11-10 2024-05-16 Gentherm Gmbh Ventilateur de siège de véhicule

Also Published As

Publication number Publication date
GB2538217A (en) 2016-11-16
GB2538217B (en) 2018-04-04
GB201500874D0 (en) 2015-03-04

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