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US20230243368A1 - Step-less speed regulating oscillating fan - Google Patents

Step-less speed regulating oscillating fan Download PDF

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Publication number
US20230243368A1
US20230243368A1 US17/649,273 US202217649273A US2023243368A1 US 20230243368 A1 US20230243368 A1 US 20230243368A1 US 202217649273 A US202217649273 A US 202217649273A US 2023243368 A1 US2023243368 A1 US 2023243368A1
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US
United States
Prior art keywords
base
fan
motor
speed regulating
fan body
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
US17/649,273
Inventor
Xueping Zhu
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.)
Shenzhen Chinaunion Technology Co Ltd
Original Assignee
Shenzhen Chinaunion Technology Co 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 Shenzhen Chinaunion Technology Co Ltd filed Critical Shenzhen Chinaunion Technology Co Ltd
Priority to US17/649,273 priority Critical patent/US20230243368A1/en
Publication of US20230243368A1 publication Critical patent/US20230243368A1/en
Priority to US18/514,196 priority patent/US20240093693A1/en
Pending 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
    • F04D25/16—Combinations of two or more pumps ; Producing two or more separate gas flows
    • F04D25/166—Combinations of two or more pumps ; Producing two or more separate gas flows using fans
    • 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
    • F04D29/52—Casings; Connections of working fluid for axial pumps
    • F04D29/522—Casings; Connections of working fluid for axial pumps especially adapted for elastic fluid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D19/00—Axial-flow pumps
    • F04D19/002—Axial flow fans
    • 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
    • F04D25/0673—Battery powered
    • 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
    • F04D25/0693—Details or arrangements of the wiring
    • 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
    • F04D25/10—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation the unit having provisions for automatically changing direction of output air
    • F04D25/105—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation the unit having provisions for automatically changing direction of output air by changing rotor axis direction, e.g. oscillating fans
    • 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
    • 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
    • F04D29/60—Mounting; Assembling; Disassembling
    • F04D29/64—Mounting; Assembling; Disassembling of axial pumps
    • F04D29/644—Mounting; Assembling; Disassembling of axial pumps especially adapted for elastic fluid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/70—Suction grids; Strainers; Dust separation; Cleaning
    • F04D29/701—Suction grids; Strainers; Dust separation; Cleaning especially adapted for elastic fluid pumps
    • F04D29/703—Suction grids; Strainers; Dust separation; Cleaning especially adapted for elastic fluid pumps specially for fans, e.g. fan guards

Definitions

  • the utility model relates to the technical field of fans, in particular to a step-less speed regulating oscillating fan.
  • the gear positions are generally mechanically controlled, and the number of the gear positions are 1 to 3 generally, thus step-less speed regulation cannot be realized; when the revolution speed of the fan is controlled, the rotary knob needs to be turned, and noise would be made when the rotary knob is turned; and according to experiences, the rotary knob can only be turned with enough efforts, thus turning the existing rotary knob wastes great efforts.
  • the utility model aims to provide a step-less speed regulating oscillating fan to solve the problems in the background of the related art.
  • the utility model provides the following technical scheme that the step-less speed regulating oscillating fan comprises a fan body and a base, wherein the fan body is installed on the base; a first motor is fixedly installed on the fan body, and blades are fixedly installed on an output shaft of the first motor;
  • a battery is installed inside the base
  • a PCB main board is installed inside the base
  • an encoder is installed on the base and is used to control the revolution speed of the fan
  • a rotary knob is fixedly installed on a rotary part of the encoder, and the rotary knob is located on the outer side of the base.
  • a second motor is installed inside the base, and an output shaft of the second motor is fixedly connected with the fan body.
  • an installing port is formed in the upper end of the base, a bearing is installed inside the installing port, and an installing post is fixedly installed at the bottom of the fan body, installed on an inner ring of the bearing, and fixedly connected with an output end of the second motor.
  • a pressing switch is installed on a rotary center of the rotary knob and is used to control the second motor to drive the fan body to oscillate.
  • a bottom cover is installed at the bottom of the base through bolts.
  • a base wire cover is installed at the installing port.
  • the step-less speed regulating oscillating fan has the beneficial effects that:
  • the encoder can be used to realize step-less speed regulation of the fan; and speed control of the fan can be realized by gently turning the rotary knob and using the encoder to control the output revolution speed of the first motor and the second motor, limitation of gear positions and mechanical rotary knob are avoided, and more efforts can be saved compared with mechanical rotary knobs.
  • FIG. 1 is the structural schematic diagram of the step-less speed regulating oscillating fan
  • FIG. 2 is the circuit diagram of an MCU control module of the step-less speed regulating oscillating fan
  • FIG. 3 is the circuit diagram of an oscillating module of the step-less speed regulating oscillating fan
  • FIG. 4 is the charging and discharging protection circuit diagram of the step-less speed regulating oscillating fan
  • FIG. 5 is the circuit diagram of gear positions of the step-less speed regulating oscillating fan.
  • 1 fan body; 2 . first motor; 3 . base; 31 . base wire cover; 4 . PCB main board; 5 . battery; 6 . bottom cover; 7 . rotary knob; 8 . encoder; 9 . second motor.
  • the utility model provides a step-less speed regulating oscillating fan, which comprises a fan body 1 and a base 3 , wherein the fan body 1 is installed on the base 3 ; and a first motor 2 is fixedly installed on the fan body 1 , blades are fixedly installed on an output shaft of the first motor 2 , and the first motor 2 drives the blades to rotate.
  • a battery 5 is installed inside the base 3 and provide power for the first motor 2 and a second motor 9 ;
  • a PCB main board 4 is installed inside the base 3 , and the PCB main board serves as a control system of the whole fan and is used to control the operation of the fan;
  • an MCU module is provided, as shown in FIG. 2 , an encoder 8 is installed on the base 3 and is used to control the revolution speed of the fan, a rotary knob 7 is fixedly installed on a rotary part of the encoder 8 , the rotation of the rotary knob 7 drives the encoder to rotate, and the rotary knob 7 is located on the outer side of the base 3 .
  • the second motor 9 is installed inside the base 3 , the output shaft of the second motor 9 is fixedly connected with the fan body 1 ; the second motor 9 is used to control the oscillation of the fan body, thus the existing mechanical rotating method is avoided; and due to the complicated structure and the large size of the mechanical rotating method, the size of the existing fan is comparatively large, while a mechanical rotating structure can be avoided by using an individual motor to control the rotation of the step-less speed regulating oscillating fan, the size of the fan can be reduced, and an individual motor is widely used, especially on the existing small-sized and portable fans.
  • PIN 3 , 4 and 5 are MCU power supply ports, and PIN 33 is a ground terminal.
  • PIN 8 is a fan output control pin, which is used to control Q 1 and step-up module U 3 -PIN 4 to turn on or turn off the fan.
  • PIN 9 is an upgrading pin.
  • PIN 10 is an oscillating limiting pin, and when the fan oscillates to the limiting switch, it will oscillate in an opposite direction.
  • PIN 11 and 12 are oscillating module control pins, which output signals to an oscillating module U 2 -PIN 1 and 2 to control the oscillating direction of the second motor.
  • PIN 13 is a charging input power detecting pin, which detects the supply voltage of a charging module U 4 -PIN 8 .
  • PIN 14 is a charging completion detecting pin, which detects the charging completion condition of a charging module U 4 -PIN 7 .
  • PIN 15 , 16 , 17 and 18 are fan gear position speed regulating pins, which regulate a U 3 -PIN 3 through MCU signals to realize the motor revolution speed regulation at different gear positions.
  • PIN 19 is a charging indication output LED indicator
  • PIN 20 is an oscillating indication output LED indicator
  • PIN 22 is a switch pin
  • the fan can be turned on by pressing and holding the switch pin in a power-off state
  • the fan can be turned off by pressing and holding the switch pin in a power-on state
  • the oscillating mode can be turned on or turned off by pressing the switch pin in a power-on state.
  • PIN 23 and 24 are encoder control pins
  • the fan can be switched to the lowest gear position by continuously rotating the encoder control pins in a power-off state, and the fan can be turned off by continuously rotating the encoder control pins at the lowest gear position in a power-on state.
  • the gear positions of the fan can be regulated at will, and the speed will not be regulated at the largest gear position.
  • PIN 25 - 32 are fan gear position expansion ports, and as shown in FIG. 5 , the number of the fan positions can be added by adjusting the U 3 -PIN 3 through MCU signals.
  • USBA-C outputs external 5V power
  • a U 4 charging module charges the battery
  • U 5 protects the battery from over-charge and over-discharge
  • a charging and discharging protection module is an existing battery protection module.
  • an installing port is formed in the upper end of the base, a bearing is installed inside the installing port, and an installing post is fixedly installed at the bottom of the fan body 1 , installed on an inner ring of the bearing, and fixedly connected with an output end of the second motor 9 .
  • the bearing enables the fan body 1 to rotate more easily.
  • a pressing switch is installed on a rotary center of the rotary knob 7 and is used to control the second motor 9 to drive the fan body 1 to oscillate.
  • a bottom cover 6 is installed at the bottom of the base 3 through bolts, and the bottom cover can be opened to facilitate placing and installing of parts in the base 3 .
  • a base wire cover 31 is installed at the installing port and can facilitate the arrangement of wires in the base and circuits in the fan body 1 .

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

Abstract

The invention is about a step-less speed regulating oscillating fan, relates to the technical field of fans, and includes a fan body and a base; the fan body is installed on the base, a motor is fixedly installed on the fan body, and blades are fixedly installed on an output shaft of the motor; a battery is installed inside the base, a PCB main board is installed inside the base, an encoder is installed on the base and is used to control the revolution speed of the fan, a rotary knob is fixedly installed on a rotary part of the encoder, and speed control of the fan can be realized by gently turning the rotary knob and using the encoder to control the output revolution speed of the motor, limitation of gear positions and mechanical rotary knob are avoided, and the purpose of saving efforts can be realized.

Description

    FIELD OF THE INVENTION
  • The utility model relates to the technical field of fans, in particular to a step-less speed regulating oscillating fan.
    • BACKGROUND OF THE RELATED ART
  • During use of the existing fan, the gear positions are generally mechanically controlled, and the number of the gear positions are 1 to 3 generally, thus step-less speed regulation cannot be realized; when the revolution speed of the fan is controlled, the rotary knob needs to be turned, and noise would be made when the rotary knob is turned; and according to experiences, the rotary knob can only be turned with enough efforts, thus turning the existing rotary knob wastes great efforts.
    • SUMMARY OF THE INVENTION
  • The utility model aims to provide a step-less speed regulating oscillating fan to solve the problems in the background of the related art.
  • In order to realize the above purpose, the utility model provides the following technical scheme that the step-less speed regulating oscillating fan comprises a fan body and a base, wherein the fan body is installed on the base; a first motor is fixedly installed on the fan body, and blades are fixedly installed on an output shaft of the first motor;
  • a battery is installed inside the base, a PCB main board is installed inside the base, an encoder is installed on the base and is used to control the revolution speed of the fan, a rotary knob is fixedly installed on a rotary part of the encoder, and the rotary knob is located on the outer side of the base.
  • Preferably, a second motor is installed inside the base, and an output shaft of the second motor is fixedly connected with the fan body.
  • Preferably, an installing port is formed in the upper end of the base, a bearing is installed inside the installing port, and an installing post is fixedly installed at the bottom of the fan body, installed on an inner ring of the bearing, and fixedly connected with an output end of the second motor.
  • Preferably, a pressing switch is installed on a rotary center of the rotary knob and is used to control the second motor to drive the fan body to oscillate.
  • Preferably, a bottom cover is installed at the bottom of the base through bolts.
  • Preferably, a base wire cover is installed at the installing port.
  • Compared with the prior art, the step-less speed regulating oscillating fan has the beneficial effects that:
  • according to the step-less speed regulating oscillating fan, the encoder can be used to realize step-less speed regulation of the fan; and speed control of the fan can be realized by gently turning the rotary knob and using the encoder to control the output revolution speed of the first motor and the second motor, limitation of gear positions and mechanical rotary knob are avoided, and more efforts can be saved compared with mechanical rotary knobs.
    • BRIEF DESCRIPTION OF THE DRAWINGS
  • FIG. 1 is the structural schematic diagram of the step-less speed regulating oscillating fan;
  • FIG. 2 is the circuit diagram of an MCU control module of the step-less speed regulating oscillating fan;
  • FIG. 3 is the circuit diagram of an oscillating module of the step-less speed regulating oscillating fan;
  • FIG. 4 is the charging and discharging protection circuit diagram of the step-less speed regulating oscillating fan;
  • FIG. 5 is the circuit diagram of gear positions of the step-less speed regulating oscillating fan.
    •
  • In the diagrams: 1. fan body; 2. first motor; 3. base; 31. base wire cover; 4. PCB main board; 5. battery; 6. bottom cover; 7. rotary knob; 8. encoder; 9. second motor.
    • DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
  • With reference to the brief drawings of the embodiments of the utility model, the technical schemes of the embodiments of the utility model are described clearly and completely. Apparently, the described embodiments are only a part of the embodiments of the utility model rather than all of the embodiments. All other embodiments based on the embodiments of the utility model and obtained by those of ordinary skill in this technical field without creative design belong to the protection scope of the utility model.
  • As shown in FIG. 1 , the utility model provides a step-less speed regulating oscillating fan, which comprises a fan body 1 and a base 3, wherein the fan body 1 is installed on the base 3; and a first motor 2 is fixedly installed on the fan body 1, blades are fixedly installed on an output shaft of the first motor 2, and the first motor 2 drives the blades to rotate.
  • A battery 5 is installed inside the base 3 and provide power for the first motor 2 and a second motor 9; a PCB main board 4 is installed inside the base 3, and the PCB main board serves as a control system of the whole fan and is used to control the operation of the fan; an MCU module is provided, as shown in FIG. 2 , an encoder 8 is installed on the base 3 and is used to control the revolution speed of the fan, a rotary knob 7 is fixedly installed on a rotary part of the encoder 8, the rotation of the rotary knob 7 drives the encoder to rotate, and the rotary knob 7 is located on the outer side of the base 3.
  • The second motor 9 is installed inside the base 3, the output shaft of the second motor 9 is fixedly connected with the fan body 1; the second motor 9 is used to control the oscillation of the fan body, thus the existing mechanical rotating method is avoided; and due to the complicated structure and the large size of the mechanical rotating method, the size of the existing fan is comparatively large, while a mechanical rotating structure can be avoided by using an individual motor to control the rotation of the step-less speed regulating oscillating fan, the size of the fan can be reduced, and an individual motor is widely used, especially on the existing small-sized and portable fans.
  • As shown in FIG. 2 and FIG. 3 , in the MCU control module, PIN3, 4 and 5 are MCU power supply ports, and PIN33 is a ground terminal.
  • PIN8 is a fan output control pin, which is used to control Q1 and step-up module U3-PIN4 to turn on or turn off the fan.
  • PIN9 is an upgrading pin.
  • PIN10 is an oscillating limiting pin, and when the fan oscillates to the limiting switch, it will oscillate in an opposite direction.
  • PIN11 and 12 are oscillating module control pins, which output signals to an oscillating module U2-PIN1 and 2 to control the oscillating direction of the second motor.
  • PIN13 is a charging input power detecting pin, which detects the supply voltage of a charging module U4-PIN8.
  • PIN14 is a charging completion detecting pin, which detects the charging completion condition of a charging module U4-PIN7.
  • PIN15, 16, 17 and 18 are fan gear position speed regulating pins, which regulate a U3-PIN3 through MCU signals to realize the motor revolution speed regulation at different gear positions.
  • PIN19 is a charging indication output LED indicator,
  • PIN20 is an oscillating indication output LED indicator,
  • PIN22 is a switch pin, the fan can be turned on by pressing and holding the switch pin in a power-off state, the fan can be turned off by pressing and holding the switch pin in a power-on state, and the oscillating mode can be turned on or turned off by pressing the switch pin in a power-on state.
  • PIN23 and 24 are encoder control pins, the fan can be switched to the lowest gear position by continuously rotating the encoder control pins in a power-off state, and the fan can be turned off by continuously rotating the encoder control pins at the lowest gear position in a power-on state. The gear positions of the fan can be regulated at will, and the speed will not be regulated at the largest gear position.
  • PIN25-32 are fan gear position expansion ports, and as shown in FIG. 5 , the number of the fan positions can be added by adjusting the U3-PIN3 through MCU signals.
  • As shown in FIG. 4 , in a charging module, USBA-C outputs external 5V power, a U4 charging module charges the battery, U5 protects the battery from over-charge and over-discharge, and a charging and discharging protection module is an existing battery protection module.
  • Furthermore, in another embodiment, an installing port is formed in the upper end of the base, a bearing is installed inside the installing port, and an installing post is fixedly installed at the bottom of the fan body 1, installed on an inner ring of the bearing, and fixedly connected with an output end of the second motor 9. The bearing enables the fan body 1 to rotate more easily.
  • A pressing switch is installed on a rotary center of the rotary knob 7 and is used to control the second motor 9 to drive the fan body 1 to oscillate.
  • A bottom cover 6 is installed at the bottom of the base 3 through bolts, and the bottom cover can be opened to facilitate placing and installing of parts in the base 3.
  • A base wire cover 31 is installed at the installing port and can facilitate the arrangement of wires in the base and circuits in the fan body 1.
  • Although the embodiments of the utility model have been shown and described, for those of ordinary skill in this field, without departing from the principles and spirits of the utility model, various changes, modifications, substitutions and variants of the embodiments can be made; and the scope of the utility model is defined by the attached claims and their equivalents.

Claims (6)

1. A step-less speed regulating oscillating fan comprises a fan body (1) and a base (3), wherein the fan body (1) is installed on the base (3);
a first motor (2) is fixedly installed on the fan body (1), and blades are fixedly installed on an output shaft of the first motor (2);
a battery (5) is installed inside the base (3), a PCB main board (4) is installed inside the base (3), an encoder (8) is installed on the base (3) and is used to control the revolution speed of the first fan (2), a rotary knob (7) is fixedly installed on a rotary part of the encoder (8), and the rotary knob (7) is located on an outer side of the base (3);
wherein a pressing switch is positioned on a rotary center of the rotary knob (7) and a press of the pressing switch activates the second motor (9) to drive the fan body (1) to oscillate.
2. The step-less speed regulating oscillating fan according to claim 1, wherein a second motor (9) is installed inside the base (3), and the output shaft of the second motor (9) is fixedly connected with the fan body (1).
3. The step-less speed regulating oscillating fan according to claim 2, wherein an installing port is formed in an upper end of the base, a bearing is installed inside the installing port, and an installing post is fixedly installed at the bottom of the fan body (1), wherein the installing post is installed on an inner ring of the bearing, and is fixedly connected with an output end of the second motor (9).
4. (canceled)
5. The step-less speed regulating oscillating fan according to claim 4, wherein a bottom cover (6) is located at the bottom of the base (3).
6. The step-less speed regulating oscillating fan according to claim 3, wherein a base wire cover (31) is positioned at the installing port.
US17/649,273 2022-01-28 2022-01-28 Step-less speed regulating oscillating fan Pending US20230243368A1 (en)

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US17/649,273 US20230243368A1 (en) 2022-01-28 2022-01-28 Step-less speed regulating oscillating fan
US18/514,196 US20240093693A1 (en) 2022-01-28 2023-11-20 Fan

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US17/649,273 US20230243368A1 (en) 2022-01-28 2022-01-28 Step-less speed regulating oscillating fan

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USD1011507S1 (en) * 2023-03-06 2024-01-16 Guangdong Aoyun Technology Co., Ltd. Fan
US12119717B1 (en) * 2023-11-09 2024-10-15 Guangdong Aoyun Technology Co., Ltd. Control circuit for fan

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5304040A (en) * 1991-07-08 1994-04-19 Duracraft Corporation Tri-pod portable fan
US6011331A (en) * 1997-04-22 2000-01-04 Emerson Electric Co. Electric motor having an improved airflow cooling system
US20120097462A1 (en) * 2010-04-12 2012-04-26 Liebherr-Werk Biberach Gmbh Electric Tracklaying Gear and Use Thereof for a Self-Propelled Working Machine

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5304040A (en) * 1991-07-08 1994-04-19 Duracraft Corporation Tri-pod portable fan
US6011331A (en) * 1997-04-22 2000-01-04 Emerson Electric Co. Electric motor having an improved airflow cooling system
US20120097462A1 (en) * 2010-04-12 2012-04-26 Liebherr-Werk Biberach Gmbh Electric Tracklaying Gear and Use Thereof for a Self-Propelled Working Machine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USD1011507S1 (en) * 2023-03-06 2024-01-16 Guangdong Aoyun Technology Co., Ltd. Fan
US12119717B1 (en) * 2023-11-09 2024-10-15 Guangdong Aoyun Technology Co., Ltd. Control circuit for fan

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