US20090180897A1 - Fan enabling increased wind pressure and air volume - Google Patents

Fan enabling increased wind pressure and air volume Download PDF

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Publication number
US20090180897A1
US20090180897A1 US12/148,733 US14873308A US2009180897A1 US 20090180897 A1 US20090180897 A1 US 20090180897A1 US 14873308 A US14873308 A US 14873308A US 2009180897 A1 US2009180897 A1 US 2009180897A1
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United States
Prior art keywords
signal
fan
unit
driving circuit
air volume
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Abandoned
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US12/148,733
Inventor
Yuan-Liang Liao
Wei-Shun Liao
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Asia Vital Components Co Ltd
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Asia Vital Components Co Ltd
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Assigned to ASIA VITAL COMPONENTS CO., LTD. reassignment ASIA VITAL COMPONENTS CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: LIAO, WEI-SHUN, LIAO, YUAN-LIANG
Publication of US20090180897A1 publication Critical patent/US20090180897A1/en
Abandoned legal-status Critical Current

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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
    • F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
    • F04D27/004—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids by varying driving speed
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Definitions

  • the present invention relates to a fan enabling increased wind pressure and air volume, and more particularly to a fan that uses a signal amplifying unit to amplify a current signal and transmits the same to a microcontroller unit for the latter to calculate and generate a control signal for controlling the fan to rotate and produce increased wind pressure and air volume.
  • the first way is to increase the rotating speed of the fan
  • the second way is to change the blade structure of the fan.
  • the increased fan rotating speed would disadvantageously result in consumption of more power and accordingly waste of more energy resource.
  • FIG. 1 shows different fan characteristic curves for a general fan used with a system having a relatively small number of components or parts arranged therein.
  • the curve B 1 is a system impedance curve representing changes in the loss of air volume produced by the fan, and will become lowered when the number of components or parts in the system is low;
  • the curve T 1 is an air volume curve representing the operating characteristic of the fan measured in a wind tunnel;
  • the point P 1 is an intersection of the curve B 1 with the curve T 1 representing an operating point of the system;
  • the circled area Q surrounding the operating point P 1 is an operating range representing the operating performance of the fan used with the system having lower number of internal components.
  • FIG. 2 shows different fan characteristic curves of a fan having increased rotating speeds and current for use in a system having densely arranged internal components or parts.
  • the airflows are interfered in their flow paths by the components in the system. That is, the impedance of the internal components of the system will prevent the airflows produced by the fan from flowing smoothly to result in loss in wind pressure.
  • FIG. 2 shows different fan characteristic curves of a fan having increased rotating speeds and current for use in a system having densely arranged internal components or parts.
  • the curve B 1 is the system impedance curve representing changes in the loss of air volume produced by the fan, and will become higher when the number of components or parts in the system is high;
  • the curve T 1 is the air volume curve representing the operating characteristic of the fan measured in a wind tunnel;
  • the point P 1 is the intersection of the curve B 1 with the curve T 1 representing an operating point of the system;
  • the circled area Q surrounding the point P 1 is an operating range representing the operating performance of the fan for carrying away the heat produced in the system.
  • a primary object of the present invention is to provide a fan that enables increased wind pressure and air volume to achieve effective heat dissipation while requiring only a low current value.
  • the fan enabling increased wind pressure and air volume includes a driving circuit unit, a signal level unit, a signal amplifying unit, and a microcontroller unit (MCU).
  • the driving circuit unit drives the fan to rotate;
  • the signal level unit receives a current signal from the driving circuit unit and corrects the level of the received current signal, and sends the corrected current signal to the signal amplifying unit;
  • the signal amplifying unit receives and amplifies the corrected current signal, and sends the amplified current signal to the MCU;
  • the MCU calculates based on the amplified current signal to generate a control signal to the driving circuit unit, so that the driving circuit unit follows the control signal to drive the fan to rotate and produce increased wind pressure and air volume to achieve effective heat dissipation at reduced power consumption.
  • FIG. 1 shows different fan characteristic curves of a conventional fan
  • FIG. 2 shows different fan characteristic curves of another conventional fan
  • FIG. 3 is a block diagram of a fan enabling increased wind pressure and air volume according to a preferred embodiment of the present invention.
  • FIG. 4 shows different fan characteristic curves of the fan according to the preferred embodiment of the present invention.
  • FIG. 3 is a block diagram of a fan enabling increased wind pressure and air volume according to a preferred embodiment of the present invention.
  • the fan of the present invention includes a driving circuit unit 10 , a signal level unit 20 , a signal amplifying unit 30 , and a microcontroller unit (MCU) 40 .
  • MCU microcontroller unit
  • the driving circuit unit 10 is electrically connected to a fan 50 for driving the fan to rotate.
  • the signal level unit 20 is electrically connected to the driving circuit unit 10 for receiving a current signal sent by the driving circuit unit 10 and correcting the level of the received current signal.
  • the signal amplifying unit 30 may be a power amplifier or an operational amplifier, and is electrically connected to the signal level unit 20 for removing some of the noises in the current signal and then amplifying the current signal.
  • the MCU 40 is electrically connected to the signal amplifying unit 30 and the driving circuit unit 10 for conducting calculation and analysis based on the current signal received from the signal amplifying unit 30 to generate a control signal to the driving circuit unit 10 , so that the driving circuit unit 10 controls the rotation of the fan 50 according to the received control signal.
  • the driving circuit unit 10 When the fan 50 starts rotating, the driving circuit unit 10 generates a current signal to the signal level unit 20 .
  • the signal level unit 20 regulates the level of the received current signal and transmits the regulated current signal to the signal amplifying unit 30 .
  • the signal amplifying unit 30 amplifies the received current signal and transmits the amplified current signal to the MCU 40 .
  • the MCU 40 calculates data of the amplified current signal to generate a control signal to the driving circuit unit 10 , and the driving circuit unit 10 follows the received control signal to control the rotation of the fan 50 , so that the fan 50 may produce increased wind pressure and air volume at low current value to effectively achieve the purposes of dissipating heat and saving energy.
  • FIG. 4 shows different fan characteristic curves of the fan 50 according to the present invention.
  • the air volume curve T 2 indicates the fan 50 according to the preferred embodiment of the present invention requires only a low current value or a current specification value thereof to be driven to rotate.
  • the system impedance curve B 1 of the fan 50 intersects the air volume curve T 2 to produce a system operating point P 2 , which is also the optimal operating point of the fan.
  • the system operating point P 2 is located in the operating area Q at a position obviously higher than that of the system operating point P 1 of the conventional fan.
  • the fan 50 has entirely enhanced fan performance characteristics and higher air volume curve T 2 to produce largely increased wind pressure and air volume. Therefore, the fan reaches the optimized operating performance thereof to effectively dissipate heat and overcomes the problems of increased power consumption caused by changing motor characteristics, such as high current value and resultant high power consumption in direct proportion to the current, as well as burnout by high-temperature heat produced by the high-speed rotation of the fan.
  • the fan of the present invention enables enhanced fan operating characteristics to produce increased wind pressure and air volume without the need of increasing the power for driving the motor thereof, and is therefore energy-saving, too.
  • the fan enabling increased wind pressure and air volume according to the present invention has the following advantages:

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Control Of Positive-Displacement Air Blowers (AREA)

Abstract

A fan enabling increased wind pressure and air volume includes a driving circuit unit, a signal level unit, a signal amplifying unit, and a microcontroller unit (MCU). The driving circuit unit drives the fan to rotate; the signal level unit receives a current signal from the driving circuit unit and corrects the level of the received current signal, and sends the corrected current signal to the signal amplifying unit; the signal amplifying unit receives and amplifies the corrected current signal, and sends the amplified current signal to the MCU; and the MCU calculates based on the amplified current signal to generate a control signal to the driving circuit unit, so that the driving circuit unit follows the control signal to drive the fan to rotate and produce increased wind pressure and air volume to achieve effective heat dissipation at reduced power consumption.

Description

    FIELD OF THE INVENTION
  • The present invention relates to a fan enabling increased wind pressure and air volume, and more particularly to a fan that uses a signal amplifying unit to amplify a current signal and transmits the same to a microcontroller unit for the latter to calculate and generate a control signal for controlling the fan to rotate and produce increased wind pressure and air volume.
    • BACKGROUND OF THE INVENTION
  • With the increasing developments in technological fields, various kinds of electronic products have been designed to provide more functions so as to increase their value in use. The increased functions necessitate the provision of more components or parts in a system having a fixed volume. The large quantity of components or parts in the electronic product result in reduced internal spaces of the system while produce more heat in the limited internal spaces of the system to necessitate the use of cooling means to carry away the produced high amount of heat. A cooling fan is most frequently selected to solve the problem of heat produced in the system because it produces convective air flows to carry away the produced heat from the system. However, when the airflows produced by the cooling fan inward flow through the system, they are inevitably impeded by the components or parts densely arranged in the system to result in largely reduced cooling effect. Therefore, it is necessary to increase the air volume and wind pressure produced by the cooling fan to maintain the expected cooling effect. Currently, there are two ways to achieve this purpose. The first way is to increase the rotating speed of the fan, and the second way is to change the blade structure of the fan. However, the increased fan rotating speed would disadvantageously result in consumption of more power and accordingly waste of more energy resource.
  • FIG. 1 shows different fan characteristic curves for a general fan used with a system having a relatively small number of components or parts arranged therein. When the fan is started to rotate, airflows produced by the fan are interfered in their flow paths by the components in the system. That is, the impedance of the internal components of the system will prevent the airflows produced by the fan from flowing smoothly to result in loss in wind pressure. In FIG. 1, the curve B1 is a system impedance curve representing changes in the loss of air volume produced by the fan, and will become lowered when the number of components or parts in the system is low; the curve T1 is an air volume curve representing the operating characteristic of the fan measured in a wind tunnel; the point P1 is an intersection of the curve B1 with the curve T1 representing an operating point of the system; and the circled area Q surrounding the operating point P1 is an operating range representing the operating performance of the fan used with the system having lower number of internal components.
  • Please refer to FIG. 2 that shows different fan characteristic curves of a fan having increased rotating speeds and current for use in a system having densely arranged internal components or parts. When the fan is rotated to produce airflows, the airflows are interfered in their flow paths by the components in the system. That is, the impedance of the internal components of the system will prevent the airflows produced by the fan from flowing smoothly to result in loss in wind pressure. In FIG. 2, the curve B1 is the system impedance curve representing changes in the loss of air volume produced by the fan, and will become higher when the number of components or parts in the system is high; the curve T1 is the air volume curve representing the operating characteristic of the fan measured in a wind tunnel; the point P1 is the intersection of the curve B1 with the curve T1 representing an operating point of the system; and the circled area Q surrounding the point P1 is an operating range representing the operating performance of the fan for carrying away the heat produced in the system.
  • As can be seen from FIGS. 1 and 2, the two circled areas Q representing the operating performance of the two types of conventional fans are relatively small. Therefore, it is necessary to improve the conventional fans to increase its operating performance.
    • SUMMARY OF THE INVENTION
  • A primary object of the present invention is to provide a fan that enables increased wind pressure and air volume to achieve effective heat dissipation while requiring only a low current value.
  • To achieve the above and other objects, the fan enabling increased wind pressure and air volume according to the present invention includes a driving circuit unit, a signal level unit, a signal amplifying unit, and a microcontroller unit (MCU). The driving circuit unit drives the fan to rotate; the signal level unit receives a current signal from the driving circuit unit and corrects the level of the received current signal, and sends the corrected current signal to the signal amplifying unit; the signal amplifying unit receives and amplifies the corrected current signal, and sends the amplified current signal to the MCU; and the MCU calculates based on the amplified current signal to generate a control signal to the driving circuit unit, so that the driving circuit unit follows the control signal to drive the fan to rotate and produce increased wind pressure and air volume to achieve effective heat dissipation at reduced power consumption.
    • BRIEF DESCRIPTION OF THE DRAWINGS
  • The structure and the technical means adopted by the present invention to achieve the above and other objects can be best understood by referring to the following detailed description of the preferred embodiments and the accompanying drawings, wherein
  • FIG. 1 shows different fan characteristic curves of a conventional fan;
  • FIG. 2 shows different fan characteristic curves of another conventional fan;
  • FIG. 3 is a block diagram of a fan enabling increased wind pressure and air volume according to a preferred embodiment of the present invention; and
  • FIG. 4 shows different fan characteristic curves of the fan according to the preferred embodiment of the present invention.
    •  DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
  • Please refer to FIG. 3, which is a block diagram of a fan enabling increased wind pressure and air volume according to a preferred embodiment of the present invention. As shown, the fan of the present invention includes a driving circuit unit 10, a signal level unit 20, a signal amplifying unit 30, and a microcontroller unit (MCU) 40.
  • The driving circuit unit 10 is electrically connected to a fan 50 for driving the fan to rotate. The signal level unit 20 is electrically connected to the driving circuit unit 10 for receiving a current signal sent by the driving circuit unit 10 and correcting the level of the received current signal. The signal amplifying unit 30 may be a power amplifier or an operational amplifier, and is electrically connected to the signal level unit 20 for removing some of the noises in the current signal and then amplifying the current signal. The MCU 40 is electrically connected to the signal amplifying unit 30 and the driving circuit unit 10 for conducting calculation and analysis based on the current signal received from the signal amplifying unit 30 to generate a control signal to the driving circuit unit 10, so that the driving circuit unit 10 controls the rotation of the fan 50 according to the received control signal.
  • When the fan 50 starts rotating, the driving circuit unit 10 generates a current signal to the signal level unit 20. The signal level unit 20 regulates the level of the received current signal and transmits the regulated current signal to the signal amplifying unit 30. The signal amplifying unit 30 amplifies the received current signal and transmits the amplified current signal to the MCU 40. The MCU 40 calculates data of the amplified current signal to generate a control signal to the driving circuit unit 10, and the driving circuit unit 10 follows the received control signal to control the rotation of the fan 50, so that the fan 50 may produce increased wind pressure and air volume at low current value to effectively achieve the purposes of dissipating heat and saving energy.
  • FIG. 4 shows different fan characteristic curves of the fan 50 according to the present invention. As can be seen from FIG. 4, the air volume curve T2 indicates the fan 50 according to the preferred embodiment of the present invention requires only a low current value or a current specification value thereof to be driven to rotate. The system impedance curve B1 of the fan 50 intersects the air volume curve T2 to produce a system operating point P2, which is also the optimal operating point of the fan. As can be seen from FIG. 4, the system operating point P2 is located in the operating area Q at a position obviously higher than that of the system operating point P1 of the conventional fan. That is, the wind pressure and air volume corresponding to the system operating point P2 are obviously higher than those corresponding to the system operating point P1 on the air volume curve T1. This means the fan 50 has entirely enhanced fan performance characteristics and higher air volume curve T2 to produce largely increased wind pressure and air volume. Therefore, the fan reaches the optimized operating performance thereof to effectively dissipate heat and overcomes the problems of increased power consumption caused by changing motor characteristics, such as high current value and resultant high power consumption in direct proportion to the current, as well as burnout by high-temperature heat produced by the high-speed rotation of the fan. In brief, the fan of the present invention enables enhanced fan operating characteristics to produce increased wind pressure and air volume without the need of increasing the power for driving the motor thereof, and is therefore energy-saving, too.
  • In conclusion, the fan enabling increased wind pressure and air volume according to the present invention has the following advantages:
    • 1. The rotation of the fan 50 is controlled through the signal amplifying unit 30 and the MCU 40, so that only a low current value is needed to obtain desired wind pressure and air volume. Therefore, the fan of the present invention is energy-saving.
    • 2. The signal amplifying unit 30 amplifies the current signal and transmits the amplified current signal to the MCU 40, and the MCU 40 calculates data of the current signal to generate the control signal to the driving circuit unit 10, so that the driving circuit unit 10 follows the control signal to control the rotation of the fan 50. Therefore, the wind pressure and the air volume may be effectively increased to achieve the purpose of heat dissipation.
  • The present invention has been described with a preferred embodiment thereof and it is understood that many changes and modifications in the described embodiment can be carried out without departing from the scope and the spirit of the invention that is intended to be limited only by the appended claims.

Claims (3)

1. A fan enabling increased wind pressure and air volume, comprising:
a driving circuit unit electrically connected to the fan for driving the fan to rotate;
a signal level unit electrically connected to the driving circuit unit for receiving a current signal from the driving circuit unit and correcting a level of the received current signal;
a signal amplifying unit electrically connected to the signal level unit for receiving the corrected current signal from the signal level unit and amplifying the received current signal; and
a microcontroller unit (MCU) electrically connected to the signal amplifying unit and the driving circuit unit, and receiving the amplified current signal from the signal amplifying unit;
wherein the MCU conducts calculation based on the received current signal that has been corrected in level by the signal level unit and amplified by the signal amplifying unit, and generates a control signal to the driving circuit unit, so that the driving circuit unit follows the control signal to control the fan to rotate and produce increased wind pressure and air volume.
2. The fan enabling increased wind pressure and air volume as claimed in claim 1, wherein the signal amplifying unit is a power amplifier.
3. The fan enabling increased wind pressure and air volume as claimed in claim 1, wherein the signal amplifying unit is an operational amplifier.
US12/148,733 2008-01-15 2008-04-22 Fan enabling increased wind pressure and air volume Abandoned US20090180897A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TW097101439A TW200826829A (en) 2008-01-15 2008-01-15 Fan capable of enhancing the characteristics of wind-pressure and flow
TW097101439 2008-01-15

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111656018A (en) * 2018-02-27 2020-09-11 依必安派特穆尔芬根有限两合公司 Operating point determination
CN115389780A (en) * 2022-10-28 2022-11-25 深圳市永联科技股份有限公司 Wind tunnel test equipment and using method thereof

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4426604A (en) * 1980-06-30 1984-01-17 Benno Doemen Direct current fan with control means
US4977375A (en) * 1989-01-18 1990-12-11 Northern Telecom Limited Fan operating status sensing circuit
US5448143A (en) * 1993-11-17 1995-09-05 Dell Usa, L.P. Sensor for monitoring fan operation in a PC or PC based system
US5727928A (en) * 1995-12-14 1998-03-17 Dell Usa L.P. Fan speed monitoring system for determining the speed of a PWM fan
US5730583A (en) * 1994-09-29 1998-03-24 Valeo Thermique Moteur Axial flow fan blade structure
US6163266A (en) * 1998-12-08 2000-12-19 Lucent Technologies Inc. Fan operation detection circuit for a DC fan and method of operation thereof
US6528987B1 (en) * 2000-06-19 2003-03-04 Analog Devices, Inc. Method and apparatus for determining fan speed
US7054721B2 (en) * 2004-01-15 2006-05-30 Hewlett-Packard Development Company, L.P. Computer fan efficiency feedback system and method
US20080181586A1 (en) * 2007-01-30 2008-07-31 Inventec Corporation Fan rotation speed control circuit of power supply system
US20080238607A1 (en) * 2007-03-30 2008-10-02 Caterpillar Inc. Fan speed control system
US7583043B2 (en) * 2007-12-27 2009-09-01 International Business Machines Corporation Apparatus, system, and method for controlling speed of a cooling fan

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4426604A (en) * 1980-06-30 1984-01-17 Benno Doemen Direct current fan with control means
US4977375A (en) * 1989-01-18 1990-12-11 Northern Telecom Limited Fan operating status sensing circuit
US5448143A (en) * 1993-11-17 1995-09-05 Dell Usa, L.P. Sensor for monitoring fan operation in a PC or PC based system
US5730583A (en) * 1994-09-29 1998-03-24 Valeo Thermique Moteur Axial flow fan blade structure
US5727928A (en) * 1995-12-14 1998-03-17 Dell Usa L.P. Fan speed monitoring system for determining the speed of a PWM fan
US6163266A (en) * 1998-12-08 2000-12-19 Lucent Technologies Inc. Fan operation detection circuit for a DC fan and method of operation thereof
US6528987B1 (en) * 2000-06-19 2003-03-04 Analog Devices, Inc. Method and apparatus for determining fan speed
US7054721B2 (en) * 2004-01-15 2006-05-30 Hewlett-Packard Development Company, L.P. Computer fan efficiency feedback system and method
US20080181586A1 (en) * 2007-01-30 2008-07-31 Inventec Corporation Fan rotation speed control circuit of power supply system
US20080238607A1 (en) * 2007-03-30 2008-10-02 Caterpillar Inc. Fan speed control system
US7583043B2 (en) * 2007-12-27 2009-09-01 International Business Machines Corporation Apparatus, system, and method for controlling speed of a cooling fan

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111656018A (en) * 2018-02-27 2020-09-11 依必安派特穆尔芬根有限两合公司 Operating point determination
US11846292B2 (en) 2018-02-27 2023-12-19 Ebm-Papst Mulfingen Gmbh & Co. Kg Method for determining the operating point
CN115389780A (en) * 2022-10-28 2022-11-25 深圳市永联科技股份有限公司 Wind tunnel test equipment and using method thereof

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Publication number Publication date
TWI373300B (en) 2012-09-21
TW200826829A (en) 2008-06-16

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Owner name: ASIA VITAL COMPONENTS CO., LTD., TAIWAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:LIAO, YUAN-LIANG;LIAO, WEI-SHUN;REEL/FRAME:020923/0519

Effective date: 20080331

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION