U.S. patent application number 14/682848 was filed with the patent office on 2016-06-02 for rotation speed control system and control method.
The applicant listed for this patent is HON HAI PRECISION INDUSTRY CO., LTD., HONG FU JIN PRECISION INDUSTRY (WuHan) CO., LTD.. Invention is credited to CHUN-SHENG CHEN, XIN YE.
Application Number | 20160153455 14/682848 |
Document ID | / |
Family ID | 56041807 |
Filed Date | 2016-06-02 |
United States Patent
Application |
20160153455 |
Kind Code |
A1 |
YE; XIN ; et al. |
June 2, 2016 |
ROTATION SPEED CONTROL SYSTEM AND CONTROL METHOD
Abstract
A rotation speed control system of a fan includes a blade group,
a motor driving the blade group to rotate, a temperature sensing
unit and a controlling unit. The temperature sensing unit is
configured to sense a temperature of a local environment of the
fan. The controlling unit is configured to control the motor to
rotate at a speed according to the sensed temperature of the local
environment and a relationship between the temperature and a motor
speed. The disclosure also provides a rotation speed control method
of a fan.
Inventors: |
YE; XIN; (Wuhan, CN)
; CHEN; CHUN-SHENG; (New Taipei, TW) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
HONG FU JIN PRECISION INDUSTRY (WuHan) CO., LTD.
HON HAI PRECISION INDUSTRY CO., LTD. |
Wuhan
New Taipei |
|
CN
TW |
|
|
Family ID: |
56041807 |
Appl. No.: |
14/682848 |
Filed: |
April 9, 2015 |
Current U.S.
Class: |
417/14 ;
417/22 |
Current CPC
Class: |
F04D 27/004 20130101;
F05D 2270/303 20130101 |
International
Class: |
F04D 15/00 20060101
F04D015/00; F04D 27/00 20060101 F04D027/00; F04D 15/02 20060101
F04D015/02 |
Foreign Application Data
Date |
Code |
Application Number |
Nov 28, 2014 |
CN |
201410701841.5 |
Claims
1. A rotation speed control system of a fan comprising: a storage
unit storing a relationship between a temperature and a motor
speed; a temperature sensing unit sensing a temperature of a local
environment of the fan when the fan is activated; a motor; a
controlling unit controlling the motor to rotate at a speed
according to the sensed temperature of the local environment and
the relationship between the temperature and the motor speed; and a
blade group driven to rotate by the motor.
2. The rotation speed control system of a fan as claimed in claim
1, wherein the temperature sensing unit periodically senses the
temperature of the environment according to a preset period.
3. The rotation speed control system of a fan as claimed in claim
2, wherein the preset period is two hours.
4. The rotation speed control system of a fan as claimed in claim
1, wherein the temperature sensing unit senses the temperature of
the environment in real time.
5. The rotation speed control system of a fan as claimed in claim
1, wherein the temperature in the relationship comprises a preset
critical temperature, the controlling unit further controls the fan
to turn off when the temperature of the environment is below the
preset critical temperature.
6. The rotation speed control system of a fan as claimed in claim
5, wherein the preset critical temperature is 25.
7. The rotation speed control system of a fan as claimed in claim
1, further comprising a display unit, the display unit displaying
the sensed temperature of the environment.
8. The rotation speed control system of a fan as claimed in claim
1, wherein the temperature in the relationship is from 28-36.
9. The rotation speed control system of a fan as claimed in claim
1, wherein the motor speed in the relationship is from 500
revolutions per minute to 1500 revolutions per minute.
10. The rotation speed control system of a fan as claimed in claim
1, wherein high temperature is corresponding to high motor
speed.
11. A rotation speed control method of a fan comprising: sensing a
temperature of the environment where the fan is located when the
fan is activated; controlling a motor of the fan to rotate at a
speed according to the sensed temperature of the local environment
and a relationship between a temperature and a motor speed; and
driving the blade group to rotate by the motor.
12. The rotation speed control method of a fan as claimed in claim
11, wherein periodically senses the temperature of the environment
according to a preset period.
13. The rotation speed control method of a fan as claimed in claim
12, wherein the preset period is two hours.
14. The rotation speed control method of a fan as claimed in claim
11, wherein senses the temperature of the environment in real
time.
15. The rotation speed control method of a fan as claimed in claim
11, wherein the temperature in the relationship comprises a preset
critical temperature.
16. The rotation speed control method of a fan as claimed in claim
15, further comprising: controlling the fan to turn off when the
temperature of the environment is below the preset critical
temperature.
17. The rotation speed control method of a fan as claimed in claim
15, wherein the preset critical temperature is 25.
18. The rotation speed control method of a fan as claimed in claim
11, further comprising: displaying the sensed temperature of the
environment.
19. The rotation speed control method of a fan as claimed in claim
11, wherein in the relationship, high temperature is corresponding
to high motor speed.
20. The rotation speed control method of a fan as claimed in claim
11, wherein the temperature in the relationship is from 28 to 36.
Description
CROSS-REFERENCE TO RELATED APPLICATIONS
[0001] This application claims priority to Taiwan Patent
Application No. 201410701841.5, filed on Nov. 28, 2014, the
contents of which are incorporated by reference herein.
FIELD
[0002] The subject matter herein generally relates to a rotation
speed control system and control method of a fan.
BACKGROUND
[0003] In high temperature environments a fan can be used for
cooling.
BRIEF DESCRIPTION OF THE DRAWINGS
[0004] Implementations of the present technology will now be
described, by way of example only, with reference to the attached
figures.
[0005] FIG. 1 is a block diagram of a fan rotation speed control
system.
[0006] FIG. 2 is a flowchart of a fan rotation speed control
method.
DETAILED DESCRIPTION
[0007] It will be appreciated that for simplicity and clarity of
illustration, where appropriate, reference numerals have been
repeated among the different figures to indicate corresponding or
analogous elements. In addition, numerous specific details are set
forth in order to provide a thorough understanding of the
embodiments described herein. However, it will be understood by
those of ordinary skill in the art that the embodiments described
herein can be practiced without these specific details. In other
instances, methods, procedures and components have not been
described in detail so as not to obscure the related relevant
feature being described. The drawings are not necessarily to scale
and the proportions of certain parts may be exaggerated to better
illustrate details and features. The description is not to be
considered as limiting the scope of the embodiments described
herein.
[0008] The term "comprising" means "including, but not necessarily
limited to"; it specifically indicates open-ended inclusion or
membership in a so-described combination, group, series, and the
like.
[0009] FIG. 1 illustrates a rotation speed control system of a fan
10 includes a blade group 12, a motor 14, a storage unit 16, a
switch unit 18, a temperature sensing unit 20 and a controlling
unit 22. The rotation speed control system of the fan 10 is
configured to automatically adjust a rotation speed of the blade
group 12 according to a temperature of a local environment of the
fan 10.
[0010] The storage unit 16 is configured to store a relationship
between a temperature and a motor speed. The temperature in the
relationship is from 28 to 36. The motor speed in the relationship
is from 500 revolutions per minute to 1500 revolutions per minute.
High temperature is corresponding to high motor speed.
[0011] The switch unit 18 is configured to control the fan 10 to
turn on and turn off. The temperature sensing unit 20 is configured
to sense the temperature of the local environment when the fan 10
is turned on. The temperature sensing unit 20 may be a circuit
including a thermistor. A resistance of the thermistor is increased
with a rise of the temperature. When the resistance is changed, an
output voltage of the circuit is changed. The temperature sensing
unit 20 obtains the temperature of the environment according to the
output voltage. In the embodiment, the temperature sensing unit 20
periodically senses the temperature of the environment according to
a preset period, for example, two hours. In another embodiment, the
temperature sensing unit 20 senses the temperature of the
environment in real time.
[0012] The controlling unit 22 is configured to control the motor
14 to rotate in a speed corresponding to the sensed temperature
according to the sensed temperature and the relationship. The motor
14 is configured to drive the blade group 12 to rotate.
[0013] In the embodiment, the temperature in the relationship
includes a preset critical temperature, for example, 25. The
controlling unit 22 is further configured to control the switch
unit 18 to turn the fan 10 off when the temperature of the
environment is below the preset critical temperature. Therefore,
the fan 10 turns off when the temperature of the environment is
below the preset critical temperature.
[0014] The control system of rotation speed of a fan 10 further
includes a display unit 24. The display unit 24 is configured to
display the current temperature of the environment.
[0015] Referring to FIG. 2, a flowchart is presented in accordance
with an example embodiment. The example method is provided by way
of example, as there are a variety of ways to carry out the method.
The method described below can be carried out using the
configurations illustrated in FIG. 1, for example, and various
elements of these figures are referenced in explaining example
method. Each block shown in FIG. 2 represents one or more
processes, methods or subroutines, carried out in the example
method. Furthermore, the illustrated order of blocks is
illustrative only and the order of the blocks can change according
to the present disclosure. Additional blocks can be added or fewer
blocks may be utilized, without departing from this disclosure. The
example method can begin at block 102.
[0016] At block 102, the temperature sensing unit 20 senses the
temperature of the environment where the fan 10 is located when the
fan 10 is activated. In the embodiment, the temperature sensing
unit 20 periodically senses the temperature of the environment
according to a preset period, for example, two hours. In another
embodiment, the temperature sensing unit 20 senses the temperature
of the environment in real time.
[0017] At block 104, the controlling unit 22 controls the motor 14
of the fan 10 to rotate at a speed according to the sensed
temperature of the local environment and a relationship between a
temperature and a motor speed. The temperature in the relationship
is from 28 to 36. The motor speed in the relationship is from 500
revolutions per minute (RPM) to 1500 RPM. High temperature is
corresponding to high motor speed.
[0018] At block 106, the motor 14 drives the blade group 12 to
rotate.
[0019] In another embodiment, the flowchart of a control method of
a rotation speed of a fan 10 further includes block 108 and block
110.
[0020] At block 108, the display unit 24 displays the sensed
temperature of the environment.
[0021] At block 110, the controlling unit 22 turns off the fan 10
when the temperature of the environment is below a preset critical
temperature, for example, 25.
[0022] The embodiments shown and described above are only examples.
Even though numerous characteristics and advantages of the present
technology have been set forth in the foregoing description,
together with details of the structure and function of the present
disclosure, the disclosure is illustrative only, and changes may be
made in the details, including in matters of shape, size and
arrangement of the parts within the principles of the present
disclosure up to, and including, the full extent established by the
broad general meaning of the terms used in the claims.
* * * * *