U.S. patent application number 13/198938 was filed with the patent office on 2013-02-07 for thermostatic control led thermal module.
The applicant listed for this patent is Wei-Shan Deng, Wen-Ji Lan. Invention is credited to Wei-Shan Deng, Wen-Ji Lan.
Application Number | 20130032325 13/198938 |
Document ID | / |
Family ID | 47626206 |
Filed Date | 2013-02-07 |
United States Patent
Application |
20130032325 |
Kind Code |
A1 |
Deng; Wei-Shan ; et
al. |
February 7, 2013 |
THERMOSTATIC CONTROL LED THERMAL MODULE
Abstract
A thermostatic control LED thermal module includes at least one
fan, a heat dissipation unit, a sensing unit and a controller. One
side of the heat dissipation unit is mated with the fan, while the
other side of the heat dissipation unit is attached to an LED unit.
The sensing unit is electrically connected to the LED unit for
detecting the temperature of the LED unit and generating a sensing
signal. The controller is electrically connected to the fan and the
sensing unit. According to the received sensing signal, the
controller operates and processes to generate a control signal to
control rotational speed of the fan so as to achieve an excellent
heat dissipation effect.
Inventors: |
Deng; Wei-Shan; (New Taipei
City, TW) ; Lan; Wen-Ji; (New Taipei City,
TW) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Deng; Wei-Shan
Lan; Wen-Ji |
New Taipei City
New Taipei City |
|
TW
TW |
|
|
Family ID: |
47626206 |
Appl. No.: |
13/198938 |
Filed: |
August 5, 2011 |
Current U.S.
Class: |
165/287 |
Current CPC
Class: |
F21V 29/763 20150115;
H01L 23/467 20130101; H01L 2924/0002 20130101; F21Y 2115/10
20160801; H05B 45/56 20200101; H05B 45/00 20200101; F21V 23/0457
20130101; H05B 45/18 20200101; F21V 29/677 20150115; H01L 23/34
20130101; H01L 2924/0002 20130101; H01L 2924/00 20130101 |
Class at
Publication: |
165/287 |
International
Class: |
F28F 27/00 20060101
F28F027/00 |
Claims
1. A thermostatic control LED thermal module comprising: at least
one fan; a heat dissipation unit having a heat absorption section
and a heat dissipation section, the heat absorption section being
attached to an LED unit, the heat dissipation section being mated
with the fan; a sensing unit disposed on the heat dissipation
section and electrically connected to the LED unit for detecting
the temperature of the LED unit and generating a sensing signal;
and a controller disposed on one side of the heat dissipation unit
and electrically connected to the fan and the sensing unit, whereby
according to received sensing signal, the controller operates and
processes to generate a control signal to control rotational speed
of the fan.
2. The thermostatic control LED thermal module as claimed in claim
1, further comprising a power supply unit, the power supply unit
being electrically connected to the controller and the fan, whereby
the controller serves to generate another control signal and
transmit the control signal to the power supply unit for powering
on or powering off the fan.
3. The thermostatic control LED thermal module as claimed in claim
1, wherein a support section is disposed between the heat
dissipation unit and the fan, one side of the support section being
inserted with the heat dissipation section, the fan being mated
with the other side of the support section, the controller and the
sensing unit being arranged on the other side of the support
section.
4. The thermostatic control LED thermal module as claimed in claim
3, wherein the support section has multiple support members, each
two adjacent support members defining therebetween a flow way for
guiding the airflow of the fan to the heat dissipation section.
5. The thermostatic control LED thermal module as claimed in claim
1, wherein the sensing unit is selected from a group consisting of
a thermistor, a thermoelectric couple and a thermal chip.
6. The thermostatic control LED thermal module as claimed in claim
1, wherein the heat dissipation unit is selected from a group
consisting of an extruded aluminum heat sink and a radiating fin
assembly.
Description
BACKGROUND OF THE INVENTION
[0001] 1. Field of the Invention
[0002] The present invention relates generally to a thermostatic
control LED thermal module, and more particularly to a thermostatic
control LED thermal module having excellent heat dissipation
effect.
[0003] 2. Description of the Related Art
[0004] Recently, various green products meeting the requirements of
energy saving and carbon reduction have been more and more
respected. Following the rapid advance of manufacturing technique
of light-emitting diode (hereinafter abbreviated as LED), various
LED products have been widely applied in various fields as
illumination devices.
[0005] When LED emits light, LED also generates high heat. The heat
must be efficiently dissipated. Otherwise, the heat will locally
accumulate where the light-emitting component is positioned to
cause rise of temperature. This will affect the normal operation of
some components of the product or even the entire product and
shorten the lifetime of the product. To solve this problem, various
LED thermal modules have been developed for providing better heat
dissipation effect for LED.
[0006] Please refer to FIGS. 1A and 1B, which show a conventional
LED thermal module. The LED thermal module includes a heat sink 10
composed of multiple radiating fins, a fan 12 and a latch means 13
positioned on an outer side of the heat sink 10. The heat sink 10
has a heat absorption section 101, a heat dissipation section 102
and multiple retainer sections 103. The heat absorption section 101
is attached to an LED unit 15. The heat dissipation section 102 is
mated with the fan 12. The fan 12 serves to forcedly dissipate the
heat of the heat dissipation section 102 of the heat sink 10.
[0007] The retainer sections 103 are disposed on four corners of
the heat sink 10. Each retainer section 103 is formed with a
through hole 1031. The fan 12 is formed with multiple perforations
121 in alignment with the through holes 1031 respectively. Multiple
threaded fastening members 16 are passed through the perforations
121 and the through holes 1031 to connect the heat sink 10 with the
fan 12 to form the LED thermal module.
[0008] When the LED unit 15 emits light and generates heat, the
heat absorption section 101 of the heat sink 10 absorbs the heat
and conducts the heat to the heat dissipation section 102. The heat
dissipation section 102 will spread the heat by way of radiation.
In addition, the fan 12 will create airflow to forcedly dissipate
the heat of the heat dissipation section 102 to achieve heat
dissipation effect.
[0009] However, the conventional LED thermal module can hardly
provide effective heat dissipation effect. This is because the fan
12 can only operate at a constant rotational speed to create
airflow with constant wind intensity. Accordingly, the wind
intensity of the fan 12 cannot be varied with the change (rise) of
the temperature of the LED unit 15. As a result, in case the LED
unit 15 generates very high heat after a long period of operation,
the fan 12 can hardly provide sufficient wind intensity to
effectively forcedly dissipate the heat of the heat sink 10. Under
such circumstance, the lifetime of the LED unit 15 will be
shortened and the luminous efficiency of the LED unit 15 will be
lowered. In some more serious cases, the LED unit 15 will even
damage (burn out) due to overheating.
[0010] Moreover, the conventional fan 12 can only provide constant
wind intensity for the LED unit 15. Therefore, it is impossible to
apply the LED thermal module to another LED unit with different
luminous power.
[0011] According to the above, the conventional LED thermal module
has the following shortcomings: [0012] 1. The conventional LED
thermal module has poor heat dissipation effect. [0013] 2. The
conventional LED thermal module cannot provide thermostatic effect
for the LED unit. [0014] 3. It is impossible to apply the
conventional LED thermal module to another LED unit with different
luminous power.
SUMMARY OF THE INVENTION
[0015] A primary object of the present invention is to provide a
thermostatic control LED thermal module having excellent heat
dissipation effect.
[0016] A further object of the present invention is to provide the
above thermostatic control LED thermal module, which is able to
provide thermostatic effect for LED unit.
[0017] A further object of the present invention is to provide the
above thermostatic control LED thermal module, which is applicable
to various LED units with different powers to provide corresponding
wind intensity for dissipating the heat.
[0018] To achieve the above and other objects, the thermostatic
control LED thermal module of the present invention includes at
least one fan, a heat dissipation unit, a sensing unit and a
controller. The heat dissipation unit has a heat absorption section
and a heat dissipation section. The heat absorption section is
attached to an LED unit. The heat dissipation section is mated with
the fan. The sensing unit is disposed on the heat dissipation
section and electrically connected to the LED unit for detecting
the temperature of the LED unit and generating a sensing signal and
transmitting the sensing signal to the controller.
[0019] The controller is disposed on one side of the heat
dissipation unit and electrically connected to the fan and the
sensing unit. According to received sensing signal, the controller
operates and processes to generate a control signal to control the
rotational speed of the fan.
[0020] The thermostatic control LED thermal module of the present
invention has excellent heat dissipation effect. In addition, the
thermostatic control LED thermal module of the present invention is
able to provide thermostatic effect for the LED unit. Also, the
thermostatic control LED thermal module of the present invention is
applicable to various LED units with different powers to provide
corresponding wind intensity for dissipating the heat.
BRIEF DESCRIPTION OF THE DRAWINGS
[0021] 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:
[0022] FIG. 1A is a perspective assembled view of a conventional
LED thermal module;
[0023] FIG. 1B is a perspective assembled view of the conventional
LED thermal module, seen from another angle;
[0024] FIG. 2 is a block diagram of a first embodiment of the
present invention;
[0025] FIG. 3 is a perspective assembled view of the first
embodiment of the present invention;
[0026] FIG. 4 is another perspective assembled view of the first
embodiment of the present invention, seen from another angle;
[0027] FIG. 5 is a perspective assembled view of a second
embodiment of the present invention;
[0028] FIG. 6 is another perspective assembled view of the second
embodiment of the present invention, seen from another angle;
and
[0029] FIG. 7 is a block diagram of a third embodiment of the
present invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0030] Please refer to FIGS. 2, 3 and 4. FIG. 2 is a block diagram
of a first embodiment of the present invention. FIG. 3 is a
perspective assembled view of the first embodiment of the present
invention. FIG. 4 is another perspective assembled view of the
first embodiment of the present invention, seen from another angle.
According to the first embodiment, the thermostatic control LED
thermal module of the present invention includes at least one fan
20, a heat dissipation unit 22, a sensing unit 23 and a controller
25. The heat dissipation unit 22 is an extruded aluminum heat sink
or a radiating fin assembly. In this embodiment, the heat
dissipation unit 22 is, but not limited to, an extruded aluminum
heat sink for illustration purposes only.
[0031] The heat dissipation unit 22 has a heat absorption section
221 and a heat dissipation section 222. The heat absorption section
221 is attached to an LED unit 26 for absorbing the heat generated
by the LED unit 26 and conducting the heat to the heat dissipation
section 222 to dissipate the heat. The heat dissipation section 222
is mated with the fan 20. The fan 20 serves to create airflow to
forcedly dissipate the heat of the heat dissipation section 222.
The LED unit 26 includes multiple LEDs 261.
[0032] Please again refer to FIGS. 2 and 3. The sensing unit 23 is,
but not limited to, a thermistor. Alternatively, the sensing unit
23 can be a thermoelectric couple or a thermal chip. In practice,
the sensing unit 23 serves to detect (or sense) the temperature of
the LED unit 26.
[0033] The sensing unit 23 is disposed on the heat dissipation
section 222 and electrically connected to the LED unit 26 for
detecting the temperature of the LED unit 26 and generating a
sensing signal and transmitting the sensing signal to the
controller 25. The controller 25 is disposed on one side of the
heat dissipation unit 22 and preferably on the heat dissipation
section 222 in adjacency to the fan 20.
[0034] The controller 25 is electrically connected to the fan 20
and the sensing unit 23. According to the received sensing signal,
the controller 25 operates and processes to generate a control
signal to control the rotational speed of the fan 20. That is,
according to the received sensing signal, the controller 25 obtains
the current temperature of the LED unit 26 and operates and
processes to transmit the control signal to control and adjust the
rotational speed of the fan 20. Accordingly, the fan 20 can
real-time adjust the wind intensity, (for example, increase or
decrease the wind intensity) in accordance with the temperature
change, (for example, rise or drop of the temperature) of the LED
unit 26. Therefore, an excellent heat dissipation effect is
achievable for the LED unit 26.
[0035] In this embodiment, the controller 25 serves to control and
keep the temperature of the LED unit 26 constant. That is, after
receiving the sensing signal, the controller 25 will compare the
sensing signal with a preset temperature range, (for example,
84.about.86 degrees) and operate. In case the detected temperature
of the LED unit 26 is higher than 86 degrees, the controller 25
transmits a control signal to control and adjust the fan 20 to
operate at a high rotational speed. Under such circumstance, the
wind intensity is increased to quickly forcedly dissipate the heat
of the heat dissipation section 222. Accordingly, the heat of the
LED unit 26 is quickly conducted to the heat dissipation section
222 with lower temperature, whereby the temperature of the LED unit
26 can be quickly lowered to be within the preset temperature range
to achieve a thermostatic effect.
[0036] In practice, a user can previously design the controller 25
in accordance with the power of the LED unit 26 for controlling the
wind intensity of the fan 20 so as to keep the temperature of the
LED unit 26 within the desired temperature range.
[0037] Please refer to FIGS. 3 and 4. When LED unit 26 generates
heat, the heat absorption section 221 of the heat dissipation unit
22 will absorb the heat and conduct the heat to the heat
dissipation section 222. The heat dissipation section 222 will
dissipate the heat by means of heat exchange between the heat
dissipation section 222 and the ambient air. In the meantime, the
sensing unit 23 continuously detects the temperature of the LED
unit 26 and transmits the sensing signal to the controller 25.
According to the received sensing signal, the controller 25
operates and processes to generate a control signal and transmit
the control signal to the fan 20 so as to control the fan 20 to
provide corresponding wind intensity for forcedly dissipate the
heat of the heat dissipation section 222. Accordingly, an excellent
heat dissipation effect and thermostatic effect are achieved.
[0038] Please now refer to FIGS. 5 and 6. FIG. 5 is a perspective
assembled view of a second embodiment of the present invention.
FIG. 6 is another perspective assembled view of the second
embodiment of the present invention, seen from another angle. The
second embodiment is substantially identical to the first
embodiment in structure and connection relationship between the
components and function and thus will not be repeatedly described
hereinafter. The second embodiment is different from the first
embodiment in that a support section 27 is disposed between the
heat dissipation unit 22 and the fan 20. One side of the support
section 27 is fixedly inserted with the heat dissipation section
222. The fan 20 is mated with the other side of the support section
27. The controller 25 and the sensing unit 23 are arranged on the
other side of the support section 27.
[0039] The support section 27 has multiple support members 271.
Each two adjacent support members 271 define therebetween a flow
way 273 for guiding the airflow of the fan 20 to the heat
dissipation section 222 to forcedly dissipate the heat of the heat
dissipation section 222.
[0040] Please now refer to FIG. 7. FIG. 7 is a block diagram of a
third embodiment of the present invention. The third embodiment is
substantially identical to the first embodiment in structure and
connection relationship between the components and function and
thus will not be repeatedly described hereinafter. The third
embodiment is different from the first embodiment in that the
thermostatic control LED thermal module further includes a power
supply unit 28, which is electrically connected to the controller
25 and the fan 20. The controller 25 serves to generate another
control signal and transmit the control signal to the power supply
unit 28 for powering on or powering off the fan 20. That is, when
the controller 25 compares the temperature of the LED unit 26 with
the preset temperature range and finds that the temperature of the
LED unit 26 is lowered than the temperature range, the controller
25 will generate another control signal and transmit the control
signal to the power supply unit 28 to power off the fan 20 and stop
the fan 20 from operating.
[0041] In case the controller 25 compares the temperature of the
LED unit 26 with the preset temperature range and finds that the
temperature of the LED unit 26 is higher than the temperature
range, the controller 25 will generate another control signal and
transmit the control signal to the power supply unit 28 to power on
the fan 20. Under such circumstance, the fan 20 will be again
turned on to operate. This can save energy.
[0042] According to the above arrangement, in comparison with the
conventional device, the present invention has the following
advantages: [0043] 1. The present invention has excellent heat
dissipation effect. [0044] 2. The present invention is able to
provide thermostatic effect for the LED unit. [0045] 3. The present
invention is applicable to various LED units with different powers
to provide corresponding wind intensity for dissipating the
heat.
[0046] The above embodiments are only used to illustrate the
present invention, not intended to limit the scope thereof. It is
understood that many changes and modifications of the above
embodiments can be made without departing from the spirit of the
present invention. The scope of the present invention is limited
only by the appended claims.
* * * * *