CN108700308B - Range hood and power supply arrangement thereof - Google Patents
Range hood and power supply arrangement thereof Download PDFInfo
- Publication number
- CN108700308B CN108700308B CN201780009485.2A CN201780009485A CN108700308B CN 108700308 B CN108700308 B CN 108700308B CN 201780009485 A CN201780009485 A CN 201780009485A CN 108700308 B CN108700308 B CN 108700308B
- Authority
- CN
- China
- Prior art keywords
- range hood
- power supply
- control unit
- light
- emitting element
- 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
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C15/00—Details
- F24C15/20—Removing cooking fumes
- F24C15/2064—Removing cooking fumes illumination for cooking hood
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C15/00—Details
- F24C15/20—Removing cooking fumes
- F24C15/2021—Arrangement or mounting of control or safety systems
Abstract
The range hood comprises a mains supply terminal (6), one or more light emitting elements (3), a light emitting element driver (4) connected to the mains supply terminal (6) and the one or more light emitting elements (3), and an Electronically Commutated (EC) motor (2) driving the fan. The supply terminals of the electronically commutated motor (2) are directly connected to the mains supply terminals (6), and the control terminals of the electronically commutated motor (2) are connected to the control unit (5). The control unit (5) is connected to the power supply output of the light emitting element driver (4).
Description
Technical Field
The invention relates to a range hood or kitchen air extraction and exhaust unit and a power supply arrangement thereof.
Background
US patent publication US2012/0052792 discloses a ventilation unit mounted in a ventilation system. The ventilation unit may include a motor coupled to the fan element and the power source. The ventilation unit may further include a calibration module having one of a voltage regulator and a current regulator, the calibration module for adjusting performance of the ventilation unit based on at least one characteristic of the ventilation system. The ac mains supply is converted to a dc voltage and provided to the dc motor via the controller.
International patent publication WO2006/092219 discloses a ventilation appliance realized as an exhaust hood. The ventilation appliance has a driver for generating an air flow and a lighting device. The control unit controls the driver and the lighting device using current-separated pulse width modulated signals.
U.S. patent publication US2014/076367 discloses a steam cleaning device for a range hood that generates high temperature steam to melt dirty grease on an exhaust fan and fan housing. The device has a control module electrically connected to the steam cleaning module, the input module, and the fan driver module. A lighting unit power supply for powering a lighting element is also provided. When the control module executes the steam cleaning mode, the heater heats the water into steam and activates the fan driver module to drive the fan motor to blow the steam to the fan housing.
Disclosure of Invention
The present invention aims to provide an improved range hood or kitchen extraction exhaust unit, in particular a power supply arrangement for a range hood or kitchen extraction exhaust unit, wherein the range hood comprises fewer electronic components and has reduced circuit complexity.
According to the present invention there is provided a range hood of the type defined in the preamble above, wherein the range hood comprises a mains power supply, one or more light-emitting elements, a light-emitting element driver connected to the mains power supply and the one or more light-emitting elements, and an electronically commutated motor driving a fan, characterized in that a power supply terminal of the electronically commutated motor is directly connected to the mains power supply and a control terminal of the electronically commutated motor is connected to a control unit, wherein the control unit is connected to a power supply output of the light-emitting element driver.
The range hood of the present invention has reduced circuit complexity because the light emitting element driver powers the control unit, allowing the electronically commutated motor to be controlled and operated by the control unit (such as changing the motor speed and hence the range hood fan speed). Accordingly, the range hood of the present invention does not require centralized power and control signal distribution in the form of a Printed Circuit Board (PCB) (sometimes referred to as a "power strip"). More specifically, the present invention allows light emitting element drivers to be used to power a control unit to control an electronically commutated motor in addition to one or more light emitting elements, thereby significantly reducing the circuit complexity of the range hood, as the control unit need not be separately powered. In a practical embodiment, the power supply output of the light emitting element driver is an auxiliary power supply output for powering the control unit.
In an advantageous embodiment, the control unit is integrated with a user interface of the range hood, which further simplifies the circuit complexity of the range hood. The power for the control unit and the user interface need not be supplied directly from the mains power supply terminal, but can be taken from the light-emitting element driver, wherein the control unit for operating the electronically commutated motor is easily operated via the user interface on the range hood.
In order to reduce the power consumption of the range hood and provide good lighting conditions under and around the range hood, an embodiment is provided wherein the one or more light emitting elements are LED light emitting elements and the light emitting element driver is an LED power supply or an LED driver. In an advantageous embodiment, the LED power supply may be a dimmable LED power supply.
In a further advantageous embodiment, the control unit is connected to the light-emitting element drivers to control the operating parameters of the light-emitting elements, so that a combined control of the lighting and the electronically commutated motor is possible, thereby avoiding the use of a further control unit controlling only one or more light-emitting elements.
Drawings
The invention will be discussed in more detail hereinafter using a number of exemplary embodiments, with reference to the accompanying drawings, in which:
figure 1 shows an embodiment of a prior art power supply arrangement for a range hood;
figure 2 shows an embodiment of a power supply arrangement for a range hood using a power filter and a standby relay according to the present invention;
figure 3 shows an alternative embodiment of a power supply arrangement for a range hood according to the invention; and
figure 4 shows an exemplary embodiment of a range hood according to the invention and its power supply arrangement.
Detailed Description
A range hood or kitchen extraction exhaust unit of the prior art typically includes an electric motor for driving (drawing) a fan. The range hood is operable by a user through, for example, a touch and/or mechanical interface on the range hood to operate the one or more light emitting elements and/or the fan. In order to provide power to one or more light-emitting elements and/or motors from a mains power terminal at the range hood, and to distribute control signals for operating the range hood, a centralized power and control signal distribution unit is provided, sometimes referred to as a "power board" in the form of a main Printed Circuit Board (PCB).
Figure 1 shows an embodiment of a prior art power supply arrangement for a range hood. In the depicted prior art embodiment, the range hood typically includes a power supply arrangement having an ac power supply terminal 26 connected to a power supply board (PWRB)20 or main printed circuit board. The power strip 20 is connected to a user interface (U/I)24, a light emitting element driver (LED DR)22, and a Motor (MTR) 21. The light-emitting element driver 22 is connected to one or more light-emitting elements, such as one or more LED lamps 23. Further, a power filter (MF)25 is provided in an ac line from the ac power supply terminal 26 to the power board 20.
As can be observed from fig. 1, the power supply board 20 is a central component of the power supply arrangement for the range hood, with power and control signals being distributed from the power supply board 20. In addition to the motor 21, the power strip 20 is the most complex and expensive component of the range hood, and the power strip 20 is also a relatively delicate component that is relatively expensive to maintain. Furthermore, because the power strip 20 distributes all of the range hood's power and control signals, the entire range hood may no longer operate in the event of a catastrophic failure, e.g., both the light emitting element and the motor may cease to operate.
Due to the above drawbacks, there is a need for a range hood with reduced engineering complexity and increased reliability, in particular with reduced electronic circuit complexity. Reducing the complexity of the electronic circuit of the range hood not only reduces the vulnerability to component failure, but also reduces the manufacturing cost.
Fig. 2 and 3 each show an embodiment of a power supply arrangement for a range hood according to the invention. In the embodiment shown, the range hood comprises a mains supply terminal 6 (or simply mains supply 6), one or more light emitting elements 3 and a light emitting element driver (PWR)4 connected to the mains supply terminal 6 and the one or more light emitting elements 3. The range hood further comprises a motor 2, in particular a brushless dc motor (or an Electronically Commutated (EC) motor) 2 for driving a fan or with an integrated fan (not shown).
According to the invention, the supply terminals of the electronically commutated motor 2 are directly connected to the mains supply terminal 6, and the control terminals of the electronically commutated motor 2 are connected to a control unit (CTRL/UI)5, wherein the control unit 5 is connected to the supply output of the light element driver 4.
As can be observed, the extractor hood of the present invention efficiently and skillfully utilizes the light emitting element driver 4 to power the control unit 5, wherein the control unit 5 is in turn capable of providing signals to the electronically commutated motor 2 and/or receiving signals from the electronically commutated motor 2 for controlling the operation (e.g., changing speed) of the electronically commutated motor 2. Most notably, since the light-emitting element driver 4 already provides power to the one or more light-emitting elements 3, the use of the power strip 20 shown in fig. 1 is avoided and thus no separate power supply for the control unit by the mains power terminal 6 is required. In a practical embodiment, the power supply output of the light emitting element driver 4 is an auxiliary power supply output (e.g. 12 volts) for powering the control unit 5.
In an advantageous embodiment, the control unit 5 is integrated with a user interface of the range hood, such that the control unit 5 can be conveniently operated by means of the user interface, wherein the user interface presents the user with control buttons on how to operate the electronically commutated motor 2 (e.g. to change the fan speed). The user interface may be arranged at an accessible location at the front of the range hood, typically at the side or at the bottom of the front of the range hood. In an embodiment, the one or more light emitting elements 3 are LED light emitting elements and the light emitting element driver 4 is an LED power supply, thereby reducing the power consumption of the range hood. Even though the light emitting element driver 4 may be an LED driver, the control unit 5 may be connected to and cooperate with any light emitting element driver 4 required for a particular application.
In an advantageous embodiment, the control unit 5 is connected to the light-emitting element driver 4 to control the operating parameters of the one or more light-emitting elements (3), as indicated by the dashed lines in the embodiments of fig. 2 and 3. In addition to controlling the electronically commutated motor 2 by means of the control unit 5, one or more light-emitting elements 3 can also be operated by means of the control unit 5. This further reduces circuit complexity and redundancy and eliminates the need for the power strip 20 outlined previously.
In the embodiment of fig. 2, it is shown that the electronically commutated motor 2 is connected to a mains power supply terminal 6 (thick line). In an embodiment, the range hood may further comprise a standby relay 8 connected between the power supply terminal of the electronically commutated motor 2 and the mains power supply terminal 6, wherein a control input of the standby relay 8 is connected to the control unit 5. In the present embodiment, the control unit 5 provides additional control over the power delivered to the electronically commutated motor 2, and may be arranged, for example, to temporarily connect and disconnect the electronically commutated motor 2 from the mains power supply terminal 6. For example, the standby relay 8 may reduce standby and various parasitic losses within the electronically commutated motor 2 during idle mode. As with control commands from the control unit 5 to the electronically commutated motor 2, for example to vary speed, the control unit 5 may be arranged to control the standby relay 8 (dotted line) to further reduce the circuit complexity of the range hood and obviate the need for the power supply board 20.
In the embodiment shown in fig. 2, the range hood comprises a power filter 7 connected between a mains supply terminal 6 and the electronically commutated motor 2 and/or the light-emitting element driver 4. The power supply filter 7 reduces noise and various EMI interference, for example, entering into the electric circuit of the hood from the power grid, and also reduces noise and various EMI interference entering into the power grid from the hood.
As mentioned above, the control unit 5 allows the electronically commutated motor 2 to be controlled, for example to control the speed of the fan. Without loss of generality, the type of control for the electronically commutated motor 2 can be selected to meet specific requirements and is not limited by the power delivered by the light emitting element driver 4 to the control unit 5. For example, in an embodiment, the control unit 5 is arranged to control the operating speed of the electronically commutated motor 2 (dashed line) using an analogue control signal or a pulse width modulated signal, so that range hoods of different applications, price and mass ranges, etc. can be manufactured.
Figure 4 shows an exemplary embodiment of a range hood according to the invention and its power supply arrangement. In the illustrated exemplary embodiment, the range hood 1 comprises a front or housing area 1a, the front or housing area 1a comprising a control unit 5 which can be combined with a user interface. The hood 1 further comprises an interior space 1b, the interior space 1b housing an electronically commutated motor 2 for driving the fan and one or more light emitting elements 3 (such as LEDs, halogen lamps, etc.). The range hood is provided with a top zone 1c comprising mains power supply terminals 6 and light-emitting element drivers 4 (i.e. typically the electronic circuitry of the range hood 1).
According to the invention, the supply terminals of the electronically commutated motor 2 are directly connected to the mains supply terminal 6. In the particular embodiment shown, the first connector portion 11 is arranged to connect the electronically commutated motor 2 and the light-emitting element driver 4 to the mains power supply terminal 6. The second connector part 12 is arranged to connect the control terminal of the electronically commutated motor 2 to the control unit 5, wherein the control unit 5 is connected to the power supply output of the light-emitting element driver 4 via the second connector part 12. In an embodiment, the power supply output of the light emitting element driver 4 may be an auxiliary power supply output (e.g. 12 volts) connected to the second connector portion 12. In another embodiment, the second connector portion 12 may be connected to the standby relay 8 to control the standby relay 8, and the power filter 7 may be provided to be connected to the first connector portion 11.
In fig. 4 it is shown that various types of cables can be used to connect the components of the power supply arrangement of the range hood 1. For example, a 3-wire (3-wire) cable type 3p is provided to connect the electronically commutated motor 2 to the mains power terminal 6, while a 2-wire (2-wire) cable type 2p is used to connect the light-emitting element driver 4 to the mains power terminal 6. The control unit 5/user interface is connected to the light-emitting element driver 4 and the electronically commutated motor 2 via a 6-wire (6-wire) cable type 6p connected to the second connector portion 12, the second connector portion 12 being connected to the light-emitting element driver 4 via a 4-wire (4-wire) cable type 4 p. The electronically commutated motor 2 is connected to the second connector portion 12 by a 2-wire cable type 2 p.
Although the embodiment of fig. 4 depicts a specific embodiment of the range hood 1, and in particular the power supply arrangement of the range hood 1, the invention is clearly embodied by fig. 4 without the use of a centralized power supply board or PCB to separately power the control unit 5 from the mains power supply terminal 6. That is, according to the present invention, the control unit 5 is powered by the light emitting element driver 4 and there is no need to separately convert the power provided at the mains power supply terminal 6, for example using a separate inverter, to power the control unit 5. In addition to the one or more light-emitting elements 3, the light-emitting element driver 4 has provided a suitable voltage and sufficient power to power the control unit 5. In this way, a complex, expensive and easily damaged power supply board can be omitted, and thus the circuit complexity and manufacturing costs of the hood 1 are significantly reduced.
In accordance with the above disclosure, the invention also relates to a power supply arrangement for a range hood or a kitchen extraction exhaust unit, wherein the power supply arrangement comprises a mains power supply terminal 6, one or more light emitting elements 3, a light emitting element driver 4 connected to the mains power supply terminal 6 and the one or more light emitting elements 3. An Electronically Commutated (EC) motor 2 is also provided which drives the fan, wherein a supply terminal of the electronically commutated motor 2 is directly connected to a mains supply terminal 6, and a control terminal of the electronically commutated motor 2 is connected to a control unit 5, wherein the control unit 5 is connected to a supply output of the light emitting element driver 4.
Consistent with the range hood 1 disclosed above, the power supply arrangement avoids the use of a power strip or PCB for distributing power and/or control signals to/from the control unit 5, the electronically commutated motor 2 and the light emitting element driver 4. Alternatively, the light-emitting element driver 4 may be used to provide power to the control unit 5, and the control unit 5 can then communicate with the electronically commutated motor 2 and/or the one or more light-emitting elements 3 to control the electronically commutated motor 2 and/or the one or more light-emitting elements 3. The electrical connections for power and control signal distribution are then made using standard power cable types.
In the foregoing, embodiments of the invention have been described with reference to a number of exemplary embodiments shown in the accompanying drawings. The implementation of some parts or elements may be modified and replaced and such modifications and replacements are included within the scope of protection as defined in the appended claims.
Claims (6)
1. Range hood comprising a mains supply terminal (6), one or more light-emitting elements (3), a light-emitting element driver (4) connected to the mains supply terminal (6) and the one or more light-emitting elements (3), and an electronically commutated motor (2) driving a fan,
characterized in that a supply terminal of the electronically commutated motor (2) is directly connected to the mains supply terminal (6) and a control terminal of the electronically commutated motor (2) is connected to a control unit (5), wherein the control unit (5) is connected to a supply output of the light emitting element driver (4),
the range hood further comprises a standby relay (8), the standby relay (8) is connected between a power supply terminal of the electronic reversing motor (2) and the commercial power supply terminal (6), wherein the control input of the standby relay (8) is connected to the control unit (5).
2. The range hood according to claim 1, wherein the control unit (5) is integrated with a user interface of the range hood.
3. The range hood of claim 1 or 2, wherein the one or more light-emitting elements (3) are LED light-emitting elements and the light-emitting element driver (4) is an LED power supply.
4. The range hood according to claim 1 or 2, wherein the control unit (5) is connected to the light emitting element driver (4) to control an operating parameter of the light emitting element (3).
5. The range hood according to claim 1 or 2, further comprising a power filter (7), the power filter (7) being connected between the mains power supply terminal (6) and the electronically commutated motor (2) and/or the light emitting element driver (4).
6. The range hood according to claim 1 or 2, wherein the control unit (5) is arranged to control the operating speed of the electronically commutated motor (2) using an analog control signal or a pulse width modulated signal.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL2016214A NL2016214B1 (en) | 2016-02-03 | 2016-02-03 | Cooker hood and power supply arrangement thereof. |
| NL2016214 | 2016-02-03 | ||
| PCT/NL2017/050052 WO2017135812A1 (en) | 2016-02-03 | 2017-01-26 | Cooker hood and power supply arrangement thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108700308A CN108700308A (en) | 2018-10-23 |
| CN108700308B true CN108700308B (en) | 2021-03-05 |
Family
ID=55754381
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201780009485.2A Active CN108700308B (en) | 2016-02-03 | 2017-01-26 | Range hood and power supply arrangement thereof |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP3411631B2 (en) |
| CN (1) | CN108700308B (en) |
| AU (1) | AU2017216120B2 (en) |
| NL (1) | NL2016214B1 (en) |
| PL (1) | PL3411631T5 (en) |
| WO (1) | WO2017135812A1 (en) |
Family Cites Families (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04302933A (en) † | 1991-03-29 | 1992-10-26 | Sony Corp | Ventilator |
| JPH0888528A (en) † | 1994-09-14 | 1996-04-02 | Zexel Corp | Power source filter |
| DE19522300C2 (en) † | 1995-06-20 | 1997-05-28 | Berufsfoerderungswerk Heidelbe | Electric safety device for hotplates |
| EP1070920A1 (en) † | 1999-07-20 | 2001-01-24 | L.N. 2 S.r.l. | Suction unit for a cooker hood |
| JP4002717B2 (en) † | 2000-08-29 | 2007-11-07 | カルソニックカンセイ株式会社 | Brushless motor control device |
| DE10102235A1 (en) † | 2001-01-19 | 2002-08-14 | Bosch Gmbh Robert | Brushless DC machine |
| CN2703975Y (en) * | 2003-11-17 | 2005-06-08 | 缪仙荣 | Speed-regulation micro computer controller for kitchen hood |
| DE102005010984A1 (en) * | 2005-03-03 | 2006-09-07 | E.G.O. Elektro-Gerätebau GmbH | Ventilation unit |
| FI117526B3 (en) † | 2005-03-17 | 2016-07-05 | Innohome Oy | Accessory that controls and monitors the operation of home appliances and entertainment equipment |
| DE102005060721A1 (en) † | 2005-12-19 | 2007-06-28 | Robert Seuffer Gmbh & Co. Kg | Hood |
| DE102009028221A1 (en) † | 2009-08-04 | 2011-02-17 | BSH Bosch und Siemens Hausgeräte GmbH | Extractor hood with control unit |
| CN102374563B (en) * | 2010-08-17 | 2015-11-25 | 博西华电器（江苏）有限公司 | There is range hood and the control method thereof of automatic flue gas detection device |
| US9638432B2 (en) | 2010-08-31 | 2017-05-02 | Broan-Nutone Llc | Ventilation unit calibration apparatus, system and method |
| DE102012200320A1 (en) † | 2012-01-11 | 2013-07-11 | BSH Bosch und Siemens Hausgeräte GmbH | Circuit for a household appliance |
| CN202734011U (en) * | 2012-08-17 | 2013-02-13 | 洪小平 | Steam cleaning control device of smoke exhaust ventilator |
| US20140076367A1 (en) * | 2012-09-14 | 2014-03-20 | Hsiao-Ping Hung | Vapor cleaning apparatus for a range hood |
| US9441810B2 (en) * | 2013-03-08 | 2016-09-13 | Kason Industries, Inc. | Cooking hood LED light |
| US20230129115A1 (en) † | 2013-05-03 | 2023-04-27 | Broan-Nutone Llc | Sensor-enabled range hood system and method |
| CN203949248U (en) * | 2014-06-13 | 2014-11-19 | 谢卓祥 | The side-suction type range hood of electronic switch and mechanical switch is housed simultaneously |
| CA2854172A1 (en) * | 2014-06-13 | 2015-12-13 | Kason Industries, Inc. | Cooking hood led light |
| CN204345758U (en) * | 2014-12-15 | 2015-05-20 | 南京鑫禾智能科技有限公司 | A kind of intelligent range hood |
-
2016
- 2016-02-03 NL NL2016214A patent/NL2016214B1/en not_active IP Right Cessation
-
2017
- 2017-01-26 PL PL17704319.7T patent/PL3411631T5/en unknown
- 2017-01-26 CN CN201780009485.2A patent/CN108700308B/en active Active
- 2017-01-26 EP EP17704319.7A patent/EP3411631B2/en active Active
- 2017-01-26 WO PCT/NL2017/050052 patent/WO2017135812A1/en active Application Filing
- 2017-01-26 AU AU2017216120A patent/AU2017216120B2/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| NL2016214B1 (en) | 2017-08-11 |
| EP3411631A1 (en) | 2018-12-12 |
| PL3411631T5 (en) | 2023-10-30 |
| EP3411631B1 (en) | 2020-01-22 |
| EP3411631B2 (en) | 2023-07-12 |
| PL3411631T3 (en) | 2020-09-07 |
| AU2017216120B2 (en) | 2021-11-04 |
| WO2017135812A1 (en) | 2017-08-10 |
| CN108700308A (en) | 2018-10-23 |
| AU2017216120A1 (en) | 2018-08-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20160018112A1 (en) | Heating element control circuit | |
| KR101629331B1 (en) | Display device and Cooking appliance having it | |
| CN109074976A (en) | Reequip remote control device | |
| US10541637B2 (en) | System-specific interface module for motor control subassembly for electric motor | |
| JP4971346B2 (en) | Remote control of lighting | |
| JP6067697B2 (en) | Light source with LED strip | |
| GB2340366A (en) | Combined microwave oven and extractor hood | |
| JP2005504949A (en) | Method and apparatus for controlling a variable speed motor | |
| IT1292485B1 (en) | VENTILATION SYSTEM FOR ELECTRIC FOOD COOKING APPLIANCES INCLUDING A HOB AND AN OVEN | |
| CN108700308B (en) | Range hood and power supply arrangement thereof | |
| CN102308488B (en) | Illumination assembly | |
| JP2014105985A (en) | Load control device | |
| TWD210334S (en) | Controller for electric actuator | |
| JP2018160373A (en) | Signal module and lighting device | |
| US11277931B2 (en) | Control device | |
| KR100628080B1 (en) | Drive circuit for back light in the induction type cooker | |
| CN210179704U (en) | Electromagnetic oven | |
| CN210157445U (en) | Lamp cup control circuit and hand controller assembly | |
| CN219346564U (en) | Cooking device | |
| CN210470144U (en) | Electric power regulator that radiating efficiency is high | |
| GB2316480A (en) | Modular cooking appliance | |
| EP4286748A1 (en) | Integrated cooker, integrated cooker control method and integrated cooker control device | |
| CN101470450A (en) | Control circuit of cooling fan | |
| RU42669U1 (en) | COMPUTER PROCESSOR COOLING SYSTEM FAN NOISE REGULATOR | |
| JPH11294811A (en) | Interlocking controller for ventilating fan |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |