EP3535533B1 - Kältegerät mit einem geräuschsensor - Google Patents
Kältegerät mit einem geräuschsensor Download PDFInfo
- Publication number
- EP3535533B1 EP3535533B1 EP17791029.6A EP17791029A EP3535533B1 EP 3535533 B1 EP3535533 B1 EP 3535533B1 EP 17791029 A EP17791029 A EP 17791029A EP 3535533 B1 EP3535533 B1 EP 3535533B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- noise
- operating power
- controller
- electrical component
- refrigeration appliance
- 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.)
- Active
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D29/00—Arrangement or mounting of control or safety devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2500/00—Problems to be solved
- F25B2500/12—Sound
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D2700/00—Means for sensing or measuring; Sensors therefor
Definitions
- the present invention relates to a refrigeration device with a noise sensor, in particular a refrigeration device with a noise sensor for adaptive noise reduction.
- the refrigerant circuit includes, inter alia, a refrigerant compressor for compressing refrigerant and a refrigerant condenser for liquefying refrigerant.
- the refrigeration device has a fan for supplying air to the refrigerant condenser.
- WO 2012/130743 A2 discloses a refrigeration device with an assembly influencing the noise emission with different operating parameters and a control unit for varying the operating parameters.
- the object of the invention is achieved by a refrigeration device with an electrical device part which emits noises during operation, a noise sensor for detecting an intensity of the emitted noises of the electrical device part and a controller for operating the electrical device part in a normal operating power range, wherein the controller is configured to change an operating power of the electrical device part within the normal operating power range and to determine a minimum of the noise intensity detected by the noise sensor and to determine a noise-reduced operating power in order to operate the electrical device part with the noise-reduced operating power.
- the technical advantage is achieved that a particularly effective and permanent reduction in the intensity of the noises which are emitted by the electrical device part can be achieved.
- the controller operates the electrical device part within its normal operating power range in order to ensure advantageous operation of the electrical device part.
- the normal operating power range is the power range in which the electrical device part is normally operated in order to ensure the advantageous and efficient function of the electrical device part within the refrigeration device.
- the controller changes an operating power of the electrical device part within the normal operating power range in order to determine a minimum of the intensity of the noises of the electrical device part detected by the noise sensor.
- the minimum of the noise intensity is in turn assigned to a specific noise-reduced operating power of the electrical device part, the noise-reduced operating power also being determined by the controller.
- the noise-reduced operating power is within the normal operating power range of the electrical device part. This makes the noise-reduced operating performance one of a number of advantageous Operating performances selected within the normal operating performance range. As a result, the noise-reduced operating performance ensures both particularly advantageous and efficient operating performance and noise-reduced operation of the electrical device part.
- the refrigeration device has a plurality of noise sensors which are designed to detect noises from different electrical device parts.
- the control can then determine a separate noise-reduced operating power for each different electrical device part and operate the respective electrical device part with the separate noise-reduced operating power.
- a refrigeration device is understood in particular to be a household refrigeration device, i.e. a refrigeration device that is used for housekeeping in households or in the catering sector, and in particular is used to store food and / or beverages at certain temperatures, such as a refrigerator, a freezer, a fridge-freezer, a freezer or a wine cooler.
- the electrical device part has a maximum operating power within the normal operating power range
- the controller is designed to determine a plurality of minimums of the noise intensity detected by the noise sensor within the normal operating power range, and the controller is designed to assign the noise-reduced operating power on the basis of the minimum determine which corresponds to an operating power of the electrical device part which is within a tolerance range of the maximum operating power.
- the technical advantage is achieved that the noise-reduced operating power determined by the control ensures both an effective noise reduction and operation of the electrical device part with the maximum operating power.
- the control is in charge of the determination a plurality of minimums of the detected noise intensity are available for the noise-reduced operating performance, so that the control can determine various noise-reduced operating performances within the normal operating performance range.
- the normal operating performance range has a lower operating performance point and an upper operating performance point, which limit the normal operating performance range
- the controller is designed to change the operating performance of the electrical device part from the lower operating performance point to the upper operating performance point in order to to determine a minimum of the recorded noise intensity.
- the noise-reduced operating power corresponds to the operating power of the electrical device part in which the recorded intensity of the noise falls below a predetermined intensity threshold value, the refrigeration device in particular having a manual operating device for a user of the refrigeration device to change the intensity threshold value.
- the control can determine the noise-reduced operating performance particularly advantageously by the detected noise intensities of all operating powers within the normal operating power range are compared with the predetermined intensity threshold value.
- the manual operating device gives the user of the refrigeration device the option of manually adjusting the intensity threshold value.
- the controller is designed to change the operating power of the electrical device part within the normal operating power range during a first time segment and to determine a minimum of the recorded noise intensity and to determine the noise-reduced operating power, and the controller is designed while a second time segment following the first time segment to operate the electrical device part with the noise-reduced operating power.
- the controller can determine the noise-reduced operating performance during the sleep time of the user of the refrigeration device, since the user is not likely to be near the refrigeration device during this time and is consequently not affected by the noises occurring during the change in operating performance.
- the controller is designed to determine the noise-reduced operating power after the refrigeration device has been connected to an electrical power supply, and / or the controller is designed to determine the noise-reduced operating power after periodically repeating operating time intervals.
- the determination of the noise-reduced operating performance according to periodically repeating Operating time intervals ensures that changes in the noise-reduced operating performance can be effectively detected by the control during ongoing operation of the refrigeration device, and an updated noise-reduced operating performance can be effectively determined.
- the controller is designed to repeat the first time segment if the controller does not determine a changed noise-reduced operating performance during the first time segment, and the controller is designed to increase the duration of the periodically repeating operating time intervals, if after the two successive first time segments no changed noise-reduced operating performance was determined by the control.
- the determination of the noise-reduced operating power can be carried out in longer time segments by increasing the duration of the periodically repeating operating time intervals.
- the refrigeration device comprises a refrigerant circuit for cooling a cooling area of the refrigeration device, the refrigerant circuit comprising the electrical device part, and the electrical device part in particular comprising a refrigerant compressor or a fan for cooling a refrigerant condenser of the refrigerant circuit.
- the technical advantage is achieved that a particularly effective noise reduction from particularly loud device parts, such as the refrigerant compressor or the fan, can be ensured.
- the operating power of the refrigerant compressor or fan corresponds to a motor speed of a motor of the refrigerant compressor or fan
- the controller being designed to change the motor speed of the refrigerant compressor or of the fan within a normal motor speed range and to a minimum of the detected noise intensity determine and determine a noise-reduced engine speed in order to operate the refrigerant compressor or fan at the noise-reduced engine speed.
- the electrical device part comprises a movable flap for closing an air duct of the refrigeration device or a valve for closing a fluid-carrying line within the refrigeration device.
- the technical advantage is achieved that a particularly effective noise reduction of the movable flap or of the valve can be ensured.
- the noise sensor comprises an acoustic sensor for detecting noises which are emitted by the electrical device part, and / or a vibration sensor for detecting vibrations which are emitted by the electrical device part, and the noise sensor in particular comprises a Piezo vibration transducers.
- an acoustic sensor enables particularly effective detection of noises which are transmitted through the air
- a vibration sensor enables particularly effective detection of vibrations which are emitted by the electrical device part.
- the noise sensor is positioned on an inner surface or on an outer surface of the refrigeration device, and / or the noise sensor is positioned on the electrical device part.
- the noise sensor is positioned on an inner surface of the refrigeration device, and the noise sensor comprises a temperature detection element for detecting a temperature within a cooling area of the refrigeration device.
- the noise sensor is designed as a dual sensor which, in addition to recording the noise, also detects the temperature in the cooling area.
- the noise sensor is designed as a dual sensor which, in addition to recording the noise, also detects the temperature in the cooling area.
- the controller has a memory for storing the noise-reduced operating power, the controller being designed to operate the electrical device part with the stored, noise-reduced operating power.
- control can advantageously store the specific noise-reduced operating power in the memory in order to operate the electrical device part with the stored noise-reduced operating power at a later point in time.
- the object of the invention is achieved by a method for noise reduction in a refrigeration device, the refrigeration device having an electrical device part which emits noises during operation, a noise sensor for detecting an intensity of emitted noises of the electrical device part and a controller for operating the electrical device part in a normal operating power range, the method comprising the steps of changing an operating power of the electrical device part within the normal operating power range by the controller to determine a minimum of the noise intensity detected by the noise sensor, determining the noise-reduced operating power based on the determined minimum of the noise intensity by the controller, and operating the electrical device part with the noise-reduced operating power by the controller.
- the changing of the operating power of the electrical device part and the determination of the noise-reduced operating power is carried out by the control during a first time segment, and the operation of the electrical device part with the noise-reduced operating power is carried out by the controller during a first time segment subsequent second period carried out.
- Fig. 1 shows a refrigerator, representative of a general refrigeration device 100, with a refrigeration device door 101 and with an external device wall 103.
- the refrigeration device door 101 is designed to close off a cooling area 105 of the refrigeration device 100.
- the refrigeration device 100 comprises one or more refrigerant circuits, each with a refrigerant evaporator, refrigerant compressor, refrigerant condenser and throttle element.
- the refrigerant evaporator is a heat exchanger in which, after expansion, the liquid refrigerant is evaporated by absorbing heat from the medium to be cooled, e.g. air.
- the refrigerant compressor is a mechanically operated part of the device that sucks refrigerant vapor from the refrigerant evaporator and expels it to the refrigerant condenser at a higher pressure.
- the refrigerant condenser is a heat exchanger in which, after compression, the evaporated refrigerant is liquefied by releasing heat to an external cooling medium, e.g. air.
- the refrigeration device 100 comprises a fan which is designed to supply an air flow to the refrigerant condenser and the refrigerant evaporator. The air flow results in an effective supply of heat to the refrigerant evaporator.
- the throttle device is a device for the constant reduction of the pressure by narrowing the cross-section.
- the refrigerant is a fluid that is used for heat transfer in the refrigerant circuit, which absorbs heat at low temperatures and low pressure of the fluid and gives off heat at higher temperature and higher pressure of the fluid, usually including changes in state of the fluid.
- Fig. 2 shows a schematic representation of a refrigeration device with noise sensors.
- a first electrical device part 107-1 and a second electrical device part 107-2 are arranged in the refrigeration device 100 according to the invention.
- the refrigeration device 100 further comprises a first noise sensor 109-1 for detecting an intensity of emitted noises of the first electrical device part 107-1 and a second noise sensor 109-2 for detecting an intensity of emitted noises of the second electrical device part 107-2.
- a controller 111 is arranged in the refrigerator 100, which connects to the first electrical device part 107-1 through a first device line 113, with the second electrical device part 107-2 through a second device line 115, with the first noise sensor 109-1 through a first Sensor line 117 and is connected to the second noise sensor 109-2 by a second sensor line 119.
- the refrigeration device 100 comprises a plurality of electrical device parts 107-1, 107-2, which are controlled, for example, by an electric motor and comprise movable elements that generate noises which, in turn, can be perceived as unpleasant by a user of the refrigeration device 100.
- the electrical device parts 107-1, 107-2 can comprise a refrigerant compressor of a refrigerant circuit of the refrigeration device 100, a fan for ventilating a refrigerant condenser of the refrigerant circuit, or flaps or valves of the refrigeration device 100.
- a structure-borne sound insulation of the electrical device parts 107-1, 107-2 used in conventional refrigeration devices 100 can often not be sufficiently implemented for functional reasons of the refrigeration device 100, e.g. impairment of the cooling performance, and / or for reasons of space and costs.
- the sound radiation is particularly high. Structural resonances are dependent on the dimensions and shape of the refrigeration device 100, the type of attachment of the electrical device parts 107-1, 107-2, and the materials used. Even small deviations in the fastening, e.g. sequence of screwing or slight tilting of a component on the refrigeration device 100, can have a major influence on the frequency range and the intensity of the excitation of the structural resonances.
- the spread of the design of the electrical device parts 107-1, 107-2 can be very large, which often stimulates device structural resonance, which can often lead to a high spread of the emitted noises of the refrigeration devices 100.
- the noise sensors 109-1, 109-2 can be arranged directly on the electrical device parts 107-1, 107-2, in their vicinity or far away from them.
- the noise sensors 109-1, 109-2 can be located inside and outside of the refrigeration device 100. Usual positions are on an inner surface of the refrigerator 100 or on an outer surface of the refrigerator 100.
- the positioning of the noise sensors 109-1, 109-2 on the device wall 103 of the refrigerator 100 is advantageous because the vibration of the surfaces can be identified and used thus simple, Inexpensive sensors, such as piezo vibration sensors, can be used.
- Multifunctional noise sensors 109-1, 109-2 can also be used, e.g. those that measure temperature and airborne sound at the same time. In this way, several functions of electrical device parts 107-1, 107-2 can be controlled at the same time. Basically, the noise sensors 109-1, 109-2 must be positioned at the points that allow conclusions to be drawn from the measurement signal of the noise sensors 109-1, 109-2 about the emitted noise of the electrical device parts 107-1, 107-2. This must be ensured for each type of refrigeration device 100 in a refrigeration device series with regard to dimensions, equipment and materials.
- the electrical equipment parts 107-1, 107-2 are individually operated by the controller 111 and become within a normal operating range of the electrical equipment parts 107-1, 107-2 the operating performance of the electrical equipment parts 107-1, 107-2 is changed, such as the number of rotations of a fan.
- the controller 111 uses the measurement signals of the corresponding noise sensors 109-1, 109-2 to determine a minimum of the noise intensity detected by the noise sensor 109-1, 109-2 and a noise-reduced operating power of the electrical device parts 107-1, 107-2 assigned to the minimum normal operating power range. The determination of the noise-reduced operating performance can be carried out during a first time segment.
- the electrical device parts 107-1, 107-2 can advantageously be operated with the noise-reduced operating power during a second time segment following the first time segment, and the noise emission of the electrical device parts 107-1, 107 -2 are advantageously reduced.
- the first time segment for determining the noise-reduced operating performance can be carried out regularly by the controller 111 during the operation of the refrigeration device 100 for the user, for example in order to compensate for changes, for example due to the transport of the refrigeration device 100. If after two consecutive first Periods of time no change occurs, the time periods between the test intervals can be increased.
- the controller 111 allows refrigeration devices 100 to be operated more quietly, and by reducing the noise of the electrical device parts 107-1, 107-2, the refrigeration devices 100 are better accepted by the user.
- the refrigeration devices 100 can be manufactured more economically because additional noise-reducing measures are not required.
- the refrigeration devices 100 can be designed in a more advantageous manner, since additive noise-reducing measures are not required. The refrigeration devices 100 thus operate in the acoustic optimum, since the noise intensity is continuously and regularly optimized.
- FIG. 3 shows a schematic representation of a determination of a noise-reduced operating performance of an electrical device part within a refrigeration device.
- FIG. 10 shows a time representation of the noise intensities of electrical device parts 107 - 1, 107 - 2, which are plotted along the ordinate axis 121 as a function of the operating power, which is indicated along the abscissa axis 123.
- the first curve 125 shows the intensity of noises from a first fan of the refrigeration device 100 as a function of the engine speed of the fan.
- the second curve 127 shows the intensity of noises from a second fan of the refrigeration device 100 as a function of the engine speed of the second fan.
- the third curve 129 shows the intensity of noises from a third fan of the refrigeration device 100 as a function of the engine speed of the third fan.
- the operating power, in this case the engine speed, of the electrical device parts 107-1, 107-2, in this case the fans of the refrigeration device 100 was within the normal operating power range 131 of the electrical device parts 107-1, 107 -2 changed.
- the normal operating power range 131 corresponds to an engine speed range between 1500 rpm and 1650 rpm, and it is sufficient to ensure efficient operation of the fans.
- the normal operating performance range 131 has a lower operating performance point 133 and an upper operating performance point 135.
- the lower and upper operating performance points 133, 135 limit the normal operating performance range 131.
- the controller 111 determines a minimum 137 of the noise intensity detected by the noise sensors 109 - 1, 109 - 2 and determines a noise-reduced operating performance 139 which is assigned to the minimum 137. In the present case, there is only a slight difference in the engine speeds between the minimum 137 and a maximum 141 of the recorded noise intensity. Nevertheless, there is a high acoustic fluctuation between the minimum 137 and the maximum 141 of the recorded noise intensity.
- the controller 111 can ensure the operation of the electrical device parts 107-1, 107-2 with the noise-reduced operating power 139 during a second time segment following the first time segment.
- Fig. 4 shows a schematic representation of a method for noise reduction in a refrigeration device.
- the method 200 comprises the following method steps, changing 201 an operating power of the electrical device part 107-1, 107-2 within the normal operating power range 131 by the controller 111 to a minimum 137 of the noise intensity detected by the noise sensor 109-1, 109-2 determine 203 the noise-reduced operating power 139 on the basis of the determined minimum 137 by the controller 111, and operating 205 the electrical device part 107-1, 107-2 with the noise-reduced operating power 139 by the controller 111.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Devices That Are Associated With Refrigeration Equipment (AREA)
- Air Conditioning Control Device (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PL17791029T PL3535533T3 (pl) | 2016-11-04 | 2017-10-20 | Urządzenie chłodnicze z czujnikiem hałasu |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102016221616.3A DE102016221616A1 (de) | 2016-11-04 | 2016-11-04 | Kältegerät mit einem Geräuschsensor |
| PCT/EP2017/076817 WO2018082937A1 (de) | 2016-11-04 | 2017-10-20 | Kältegerät mit einem geräuschsensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP3535533A1 EP3535533A1 (de) | 2019-09-11 |
| EP3535533B1 true EP3535533B1 (de) | 2021-06-09 |
Family
ID=60186264
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP17791029.6A Active EP3535533B1 (de) | 2016-11-04 | 2017-10-20 | Kältegerät mit einem geräuschsensor |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US11067333B2 (pl) |
| EP (1) | EP3535533B1 (pl) |
| CN (1) | CN109891172B (pl) |
| DE (1) | DE102016221616A1 (pl) |
| PL (1) | PL3535533T3 (pl) |
| WO (1) | WO2018082937A1 (pl) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102022207931A1 (de) | 2022-08-01 | 2024-02-01 | Robert Bosch Gesellschaft mit beschränkter Haftung | Verfahren zum Betreiben einer Aktuatoreinrichtung mit einer elektrischen Maschine, Vorrichtung zum Betreiben einer Aktuatoreinrichtung mit einer elektrischen Maschine, Aktuatoreinrichtung mit einer elektrischen Maschine |
| WO2024050610A1 (en) | 2022-09-06 | 2024-03-14 | Nidec Global Appliance Brasil Ltda. | Method and system for controlling the vibration of a variable capacity compressor of a refrigeration system |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10941981B2 (en) * | 2019-05-02 | 2021-03-09 | Haier Us Appliance Solutions, Inc. | Refrigeration appliances and methods of minimizing noise impact |
| CN114003069B (zh) * | 2021-12-30 | 2022-04-01 | 深圳市华图测控系统有限公司 | 基于物联网的温控设备降噪方法、装置以及系统 |
| CN116399077B (zh) * | 2023-04-07 | 2024-09-27 | 海信冰箱有限公司 | 一种冰箱及其降噪控制方法 |
| KR20250014350A (ko) * | 2023-07-19 | 2025-02-03 | 삼성전자주식회사 | 냉장고 및 냉장고의 소음 진단 방법 |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5203178A (en) * | 1990-10-30 | 1993-04-20 | Norm Pacific Automation Corp. | Noise control of air conditioner |
| US5582013A (en) * | 1995-05-09 | 1996-12-10 | Regents Of The University Of California | Electromechanical cryocooler |
| KR100609849B1 (ko) | 2000-02-12 | 2006-08-09 | 삼성전자주식회사 | 냉장고 및 그 제어방법 |
| CN100480603C (zh) * | 2004-04-12 | 2009-04-22 | 约克国际公司 | 冷却器声音降低控制系统和方法 |
| KR100677879B1 (ko) | 2005-05-30 | 2007-02-05 | 삼성전자주식회사 | 냉장고의 소음 저감방법 |
| KR20110014857A (ko) * | 2009-08-06 | 2011-02-14 | 엘지전자 주식회사 | 냉장고 소음에 대한 소음불만율 산출방법 |
| KR101663835B1 (ko) | 2010-08-06 | 2016-10-14 | 엘지전자 주식회사 | 냉장고의 운전 제어 방법 |
| DE102011006258A1 (de) | 2011-03-28 | 2012-10-04 | BSH Bosch und Siemens Hausgeräte GmbH | Kältegerät |
| US9311837B2 (en) * | 2013-03-14 | 2016-04-12 | Martigold Enterprises, Llc | Methods and apparatus for message playback |
| KR20150098085A (ko) * | 2014-02-19 | 2015-08-27 | 주식회사 대유위니아 | 냉장고 운전 제어 방법 |
-
2016
- 2016-11-04 DE DE102016221616.3A patent/DE102016221616A1/de not_active Withdrawn
-
2017
- 2017-10-20 WO PCT/EP2017/076817 patent/WO2018082937A1/de not_active Ceased
- 2017-10-20 PL PL17791029T patent/PL3535533T3/pl unknown
- 2017-10-20 EP EP17791029.6A patent/EP3535533B1/de active Active
- 2017-10-20 US US16/346,556 patent/US11067333B2/en active Active
- 2017-10-20 CN CN201780067639.3A patent/CN109891172B/zh active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102022207931A1 (de) | 2022-08-01 | 2024-02-01 | Robert Bosch Gesellschaft mit beschränkter Haftung | Verfahren zum Betreiben einer Aktuatoreinrichtung mit einer elektrischen Maschine, Vorrichtung zum Betreiben einer Aktuatoreinrichtung mit einer elektrischen Maschine, Aktuatoreinrichtung mit einer elektrischen Maschine |
| WO2024050610A1 (en) | 2022-09-06 | 2024-03-14 | Nidec Global Appliance Brasil Ltda. | Method and system for controlling the vibration of a variable capacity compressor of a refrigeration system |
Also Published As
| Publication number | Publication date |
|---|---|
| US20190257575A1 (en) | 2019-08-22 |
| CN109891172A (zh) | 2019-06-14 |
| DE102016221616A1 (de) | 2018-05-09 |
| PL3535533T3 (pl) | 2021-12-13 |
| WO2018082937A1 (de) | 2018-05-11 |
| US11067333B2 (en) | 2021-07-20 |
| EP3535533A1 (de) | 2019-09-11 |
| CN109891172B (zh) | 2021-04-13 |
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