CN101174808B - Control circuit and driving device including the same - Google Patents

Control circuit and driving device including the same Download PDF

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Publication number
CN101174808B
CN101174808B CN2007101240587A CN200710124058A CN101174808B CN 101174808 B CN101174808 B CN 101174808B CN 2007101240587 A CN2007101240587 A CN 2007101240587A CN 200710124058 A CN200710124058 A CN 200710124058A CN 101174808 B CN101174808 B CN 101174808B
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CN
China
Prior art keywords
drive unit
coil
module
coils
control circuit
Prior art date
Application number
CN2007101240587A
Other languages
Chinese (zh)
Other versions
CN101174808A (en
Inventor
周文杰
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台达电子零组件(东莞)有限公司
台达电子工业股份有限公司
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Priority to CN2007101240587A priority Critical patent/CN101174808B/en
Publication of CN101174808A publication Critical patent/CN101174808A/en
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Publication of CN101174808B publication Critical patent/CN101174808B/en

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    • GPHYSICS
    • G05CONTROLLING; REGULATING
    • G05DSYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D23/00Control of temperature
    • G05D23/19Control of temperature characterised by the use of electric means
    • G05D23/1906Control of temperature characterised by the use of electric means using an analogue comparing device
    • G05D23/1912Control of temperature characterised by the use of electric means using an analogue comparing device whose output amplitude can take more than two discrete values
    • GPHYSICS
    • G06COMPUTING; CALCULATING; COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F1/00Details not covered by groups G06F3/00 – G06F13/00 and G06F21/00
    • G06F1/16Constructional details or arrangements
    • G06F1/20Cooling means
    • G06F1/206Cooling means comprising thermal management

Abstract

The invention discloses a control circuit and a driving device which includes coils. The control circuit includes a temperature sensor module which senses an environment temperature and produces a temperature signal as well as a regulator module coupled with the symmetric parallel conductor coil using the connection way in which the temperature signal changes the symmetric parallel conductor coil to regulate the impedance value of the driving device. The connecting mode of the coils is changed through the temperature sensor module and the regulator module to regulate the impedance value of the driving device. When the impedance is changed, the rotating speed of the driving device is regulated to avoid noises caused by the rapid change of the inductor current of the driving device and loss caused by the speeding switch when the traditional PWM control is used, thereby reducing maintenance cost and noise and improving the quality of the product.

Description

A kind of control circuit and comprise the drive unit of this control circuit

Technical field

The present invention relates to a kind of control circuit, be specifically related to a kind of circuit for controlling speed of fan, the invention still further relates to a kind of drive unit that comprises this circuit for controlling speed of fan.

Background technology

Nowadays along with the continuous development of electronic technology, the central processing unit of computer-internal (CentralProcessing Unit; CPU) or the caloric value of other electronic building brick also increasing, and for making the normal operation under the condition of work of high power, high heating of these electronic building bricks miscellaneous, its heat radiation requires also more raising accordingly.General common radiating mode ties up to and installs a radiator fan on these electronic building bricks additional, and it operates it by a drive unit, can reach the requirement of quick heat radiating by running up.On the other hand, in order to lower the power consumption of radiator fan, and the useful life of prolongation drive unit, work in low power condition following time at electronic building brick, because its caloric value relatively also reduces many, just can make this moment drive unit reduce the rotating speed of radiator fan, radiator fan is turned round under low speed state to reduce power consumption.

In existing technology, drive unit adopts pulse-width modulation (Pulse Width Modulation usually; PWM) adjust the rotating speed of radiator fan, PWM system changes the conducting and the interruption of the inductance of fan in the unit interval according to the temperature of electronic building brick, and then adjusts the rotating speed of fan.Because general radiator fan has the wider range of speeds, relatively the current range that will regulate of PWM also can be bigger, and the electronic building brick (for example central processing unit) that needs the use fan to dispel the heat, be with lower power running in the time of mostly, its caloric value is not high, and fan can Be Controlled run on low speed state, and this moment is under the control of PWM, the rapid variation of the inductive current of fan will bring sizable noise, also can increase the loss of switch simultaneously.

In sum, how drive unit can make the rotating speed of otherwise dynamically adjusting fan, and increase extra cost and noise not significantly in response to the temperature of electronic building brick, for this reason the industry in field need the target of effort badly.

Summary of the invention

Main purpose of the present invention is: provide a kind of and can dynamically adjust rotation speed of the fan, reduce maintenance cost, the control circuit that improves the quality of products; Another object of the present invention is to: a kind of drive unit that uses above-mentioned control circuit is provided.

Technical scheme provided by the invention is as follows: main purpose of the present invention is: a kind of control circuit is provided, is used for a drive unit, this drive unit comprises a plurality of coils, and this control circuit comprises:

One temperature sensing module in order to sensing one ambient temperature, and produces a temperature signal; And

One adjusting module is coupled to these coils, in order in response to one of these these coils of temperature signal conversion connected mode, to adjust one of this drive unit resistance value.

As an improvement of the present invention: the connected mode of described these coils in parallel, connect and make up one of them.

As a further improvement on the present invention: described these coils comprise one first coil and one second coil, this drive unit more comprises a switch module, this adjusting module is adjusted signal with this switch module of conducting because of this temperature signal output one, make this first coil and this second two coil see through this switch module and couple, to adjust the resistance value of this drive unit with series system.

As a further improvement on the present invention: described these coils comprise one first coil and one second coil, this drive unit more comprises one first switch module and a second switch assembly, this adjusting module is adjusted signal with this first switch module of conducting and this second switch assembly in response to this temperature signal output one, in order to do this first coil and this second coil are coupled with parallel way through this first switch module and this second switch assembly, to adjust the resistance value of this drive unit.

As a further improvement on the present invention: described these switch modules Shu wherein is a metal-oxide half field effect transistor (Metal-Oxide-Semiconductor Field-Effect Transistor; MOSFET):

As a further improvement on the present invention: described this drive unit is a fan, and this adjusting module is a resistance value of adjusting this fan in response to this temperature signal, with one of this fan of conversion rotating speed.

As a further improvement on the present invention: described this adjusting module is more with a pulse-width modulation (Pulse WidthModulation; PWM) rotating speed of this fan of mode conversion.

Another object of the present invention is to: a kind of drive unit is provided, comprises:

A plurality of coils; And

One control circuit comprises:

One temperature sensing module in order to the testing environment temperature, and produces a temperature signal; And

One adjusting module is coupled to these coils, in order in response to one of these these coils of temperature signal conversion connected mode, to adjust one of this drive unit resistance value.

As an improvement of the present invention: the connected mode of described these coils in parallel, connect and make up one of them.

As a further improvement on the present invention: described these coils comprise one first coil and one second coil, this drive unit more comprises a switch module, the adjusting module of this control circuit is adjusted signal with this switch module of conducting in response to this temperature signal output one, make this first coil and this second coil see through this switch module and couple, to adjust the resistance value of this drive unit with series system.

As a further improvement on the present invention: described these coils comprise one first coil and one second coil, this drive unit more comprises one first switch module and a second switch assembly, the adjusting module of this control circuit is adjusted signal with this first switch module of conducting and this second switch assembly in response to this temperature signal output one, this first coil and this second coil are coupled, to adjust the resistance value of this drive unit with parallel way through this first switch module and this second switch assembly.

As a further improvement on the present invention: one of them is a metal-oxide half field effect transistor for described these switch modules.

As a further improvement on the present invention: described this drive unit is a fan, and this adjusting module is a resistance value of adjusting this fan in response to this temperature signal, with one of this fan of conversion rotating speed.

As a further improvement on the present invention: described this adjusting module is more with the rotating speed of this fan of pulse-width modulation mode conversion.

The present invention has the following advantages: see through temperature sensing module and adjusting module are adjusted drive unit with the connected mode that changes a plurality of coils resistance value, when the resistance value of drive unit changes, can adjust the rotating speed of drive unit, when avoiding tradition to use PWM control, the noise that rapid variation brought of the inductive current of drive unit and the acceleration loss of switch, reduce maintenance cost, reduce noise, improved product quality.

Description of drawings

Fig. 1 is the schematic diagram of first embodiment of the invention;

Fig. 2 is the schematic diagram of first embodiment of the invention;

Fig. 3 is the schematic diagram of first embodiment of the invention;

Among the figure

1: 11: the first coils of drive unit

Coil 13 in 12: the second: control circuit

130: temperature signal 131: temperature sensing module

132: the first adjustment signals 133: adjusting module

14: the first switch modules of 134: the second adjustment signals

15: second switch assembly 2: 21: the first coils of drive unit

Coil 23 in 22: the second: control circuit

230: temperature signal 231: temperature sensing module

232: the first adjustment signals 233: adjusting module

24: the first switch modules of 234: the second adjustment signals

25: the second switch assembly

3: 31: the first coils of drive unit

Coil 33 in 32: the second: control circuit

330: temperature signal 331: temperature sensing module

332: the first adjustment signals 333: adjusting module

The adjustment signal was adjusted signal in 336: the three in 334: the second

Switch module 35 in 34: the first: the second switch assembly

36: the three switch modules

Embodiment

Below in conjunction with accompanying drawing concrete execution mode is illustrated:

Embodiment one, as shown in Figure 1, is a drive unit 1, and it comprises a plurality of coils (being called first coil 11 and second coil 12 in the present embodiment), a control circuit 13, one first switch module 14 and a second switch assembly 15.In the present embodiment, drive unit 1 is a fan, and control circuit 13 then can be adjusted the rotating speed of drive unit 1 according to an ambient temperature.Control circuit 13 comprises a temperature sensing module 131 and an adjusting module 133.Temperature sensing module 131 sensings one ambient temperature, and produce a temperature signal 130.Adjusting module 133 is coupled to first coil 11 and second coil 12, and is electrically connected to first switch module 14 and second switch assembly 15 in addition, by this in response to the connected mode of these coils of temperature signal 130 conversion, to adjust the overall impedance value of drive unit 1.In detail, in the time of in ambient temperature remains on a preset range, adjusting module 133 transmissions one first adjustment signal 132 makes first switch module 14 keep conductings and sends one second adjustment signal 134 and makes second switch assembly 15 present off state, flow to coil 12 generations one resistance value in order to do making electric current only can see through first switch module 14, and come the rotating speed of accessory drive 1 with this resistance value.

When ambient temperature reduces, signal 132 is adjusted in first of adjusting module 133 outputs will make first switch module 14 present off state, and the second adjustment signal 134 of adjusting module 133 outputs electrically connects in order to do making first coil 11 and second coil 12 see through second switch assembly 15 conducting second switch assembly 15 with series system.First coil 11 and second coil 12 will produce resistance value jointly this moment, and under the resistance value that has only first coil 11 to be produced was compared, the resistance value that first coil 11 and 12 series connection of second coil are produced was what increase.For example, the impedance of first coil 11 and second coil 12 is all 2 nurses difficult to understand, and when 14 conductings of first switch module and second switch assembly 15 when being off state, the resistance value of drive unit 1 is 2 nurses difficult to understand; When first switch module 14 was off state and 15 conductings of second switch assembly, first coil 11 and second coil 12 were series connection, and this moment, the overall impedance value of drive unit 1 was 4 nurses difficult to understand.When the overall impedance value of drive unit 1 increased, the rotating speed of drive unit 1 will reduce, and then reduced the consumed power of drive unit 1.

When needs promoted the rotating speed of drive unit 1 once more, 133 of adjusting modules were adjusted signal 132 and second mode of adjusting signal 1 34 makes first switch module 14 keep conductings and make second switch assembly 15 present off state to change first.Thus, the rotating speed of drive unit 1 can along with the conducting of first switch module 14 and second switch assembly 15 whether and be controlled.

In the present embodiment, first switch module 14 and second switch assembly 15 respectively can be a metal-oxide half field effect transistor (Metal-Oxide-Semiconductor Field-Effect Transistor; MOSFET), the connected mode of metal-oxide half field effect transistor and first coil 11 and second coil 12 is known by those who are familiar with this art, does not add at this and gives unnecessary details.

Embodiment two, as shown in Figure 2, are a drive unit 2, and it comprises a plurality of coils (being first coil 21 and second coil 22 in the present embodiment), a control circuit 23, one first switch module 24 and a second switch assembly 25.In the present embodiment, drive unit 2 is a fan, and control circuit 23 then can be adjusted the rotating speed of drive unit 2 according to an ambient temperature.Control circuit 23 comprises a temperature sensing module 231 and an adjusting module 233.Temperature sensing module 231 sensings one ambient temperature, and produce a temperature signal 230.Adjusting module 233 is coupled to first coil 21 and second coil 22, and is electrically connected to first switch module 24 and second switch assembly 25 in addition, by this in response to the connected mode of these coils of temperature signal 230 conversion, to adjust the overall impedance value of drive unit 2.In detail, in the time of in ambient temperature remains on a preset range, adjusting module 233 transmissions one first adjustment signal 232 makes first switch module 24 keep conductings and sends one second adjustment signal 234 and makes second switch assembly 25 present off state, flow to coil 22 generations one resistance value in order to do making electric current only can see through first switch module 24, and come the rotating speed of accessory drive 2 with this resistance value.

When ambient temperature raise, second of adjusting module 233 outputs were adjusted signal 234 with conducting second switch assembly 25, electrically connected with parallel way in order to do the conducting that makes first coil 21 and second coil 22 see through first switch module 24 and second switch assembly 25.First coil 21 and second coil 22 will produce resistance value jointly this moment, and under the resistance value that has only first coil 21 to be produced was compared, first coil 21 and second coil, 22 resistance values that produced in parallel were what reduce.For example, the impedance of first coil 21 and second coil 22 is all 2 nurses difficult to understand, and when 24 conductings of first switch module and second switch assembly 25 when being off state, the resistance value of drive unit 2 is 2 nurses difficult to understand; Adjust in response to first that signal 232 and second is adjusted signal 234 and during conducting, first coil 21 and second coil 22 are in parallel when first switch module 24 and second switch assembly 25, this moment, the overall impedance value of drive unit 2 was 1 nurse difficult to understand.When the overall impedance value of drive unit 2 reduced, the rotating speed of drive unit 2 will increase, and then improved the heat dissipation of drive unit 2.

When needs reduced the rotating speed of drive unit 2 once more, 233 of adjusting modules were adjusted signal 232 and second mode of adjusting signal 234 makes first switch module 24 keep conductings and make second switch assembly 25 present off state to change first.Thus, the rotating speed of drive unit 2 can along with the conducting of first switch module 24 and second switch assembly 25 whether and be controlled.

In the present embodiment, first switch module 24 and second switch assembly 25 respectively can be a metal-oxide half field effect transistor, and the connected mode of metal-oxide half field effect transistor and first coil 21 and second coil 22 is known by those who are familiar with this art, does not add at this and gives unnecessary details.

Embodiment three, as shown in Figure 3, are a drive unit 3, comprise a plurality of coils (being first coil 31 and second coil 32 in the present embodiment), a control circuit 33, one first switch module 34, a second switch assembly 35 and one the 3rd switch module 36.In the present embodiment, drive unit 3 is a fan, and control circuit 33 then can be adjusted the rotating speed of drive unit 3 according to an ambient temperature.Control circuit 33 comprises a temperature sensing module 33 1 and an adjusting module 333.Temperature sensing module 33 1 sensings one ambient temperature, and produce a temperature signal 330.Adjusting module 333 is coupled to first coil 21 and second coil 32, and be electrically connected to first switch module 34, second switch assembly 35 and the 3rd switch module 36 in addition, by this in response to the connected mode of these coils of temperature signal 330 conversion, to adjust the overall impedance value of drive unit 3.In detail, in the time of in ambient temperature remains on a preset range, adjusting module 333 sends one first adjustment signal 332 makes first switch module 34 present off state; Sending one second adjusts signal 334 and makes 35 conductings of second switch assembly and send one the 3rd and adjust signal 336 and make the 3rd switch module 36 present off state, flow to coil 32 generations one resistance value in order to do making electric current only can see through the two or two switch module 35, and come the rotating speed of accessory drive 3 with this resistance value.

When ambient temperature reduces, signal 332 is adjusted in first of adjusting module 333 outputs will make 34 conductings of first switch module, and second adjustment signal 334 of adjusting module 133 outputs and the 3rd adjustment signal 336 will make second switch assembly 35 and the 3rd switch module 36 present off state respectively, electrically connect with series system in order to do making first coil 31 and second coil 32 see through first switch module 34.First coil 31 and second coil 32 will produce resistance value jointly this moment, and under the resistance value that has only first coil 31 to be produced was compared, the resistance value that first coil 31 and 32 series connection of second coil are produced was what increase.For example, the impedance of first coil 31 and second coil 32 is all 2 nurses difficult to understand, and when 35 conductings of second switch assembly and first switch module 34 and the 3rd switch module 36 when being off state, the resistance value of drive unit 3 is 2 nurses difficult to understand; And when 34 conductings of first switch module and second switch assembly 35 and the 3rd switch module 36 were off state, first coil 31 and second coil 32 were series connection, and this moment, the overall impedance value of drive unit 3 was 4 nurses difficult to understand.When the overall impedance value of drive unit 3 increased, the rotating speed of drive unit 3 will reduce, and then reduced the consumed power of drive unit 3.

On the other hand, when ambient temperature raises, signal 334 is adjusted in second of adjusting module 333 outputs and the 3rd adjustment signal 336 will be distinguished conducting second switch assembly 35 and the 3rd switch module 36, and the first adjustment signal 332 of adjusting module 333 outputs will make first switch module 34 present off state, electrically connect with parallel way in order to do the conducting that makes first coil 31 and second coil 32 see through second switch assembly 35 and the 3rd switch module 36.First coil 31 and second coil 32 will produce resistance value jointly this moment, and under the resistance value that has only first coil 31 to be produced was compared, first coil 31 and second coil, 32 resistance values that produced in parallel were what reduce.For example, the impedance of first coil 31 and second coil 32 is all 2 nurses difficult to understand, and when 35 conductings of second switch assembly and first switch module 34 and the 3rd switch module 36 when being off state, the resistance value of drive unit 3 is 2 nurses difficult to understand; When second switch assembly 35 and the 3rd switch module 36 adjust in response to second that signal 334 and the 3rd is adjusted signal 336 conductings and first switch module 34 when adjusting signal 332 and present off state in response to first, first coil 31 and second coil 32 are in parallel, and this moment, the overall impedance value of drive unit 3 was 1 nurse difficult to understand.When the overall impedance value of drive unit 3 reduced, the rotating speed of drive unit 3 will increase, and then improved the heat dissipation of drive unit 3.

In other words, the connected mode of the coil of the 3rd embodiment can be parallel connection, series connection and combination Shu wherein thereof, sees through the various various combinations of coil connected mode, and drive unit 3 can mark off a plurality of rotating speeds interval by the combination of different coils.

In the present embodiment, first switch module 34, second switch assembly 35 and the 3rd switch module 36 respectively can be a metal-oxide half field effect transistor, the connected mode of metal-oxide half field effect transistor and first coil 31 and second coil 32 is known by those who are familiar with this art, does not add at this and gives unnecessary details.

In addition, because these coils can change by resistance value, mark off a plurality of rotating speeds interval, and in each rotating speed interval, the rotating speed of its fine setting then can further carry out trickle adjustment by adjusting module 333 in the PWM mode, and it can be reached easily for those who are familiar with this art, does not add at this and gives unnecessary details.

In sum, the present invention can see through temperature sensing module and adjusting module are adjusted drive unit with the connected mode that changes a plurality of coils overall impedance value.When the resistance value of drive unit changes, can adjust the rotating speed of drive unit, when avoiding tradition to use the rotating speed of PWM accessory drive, the noise that rapid variation brought of the inductive current of drive unit and the acceleration loss of switch.Owing to the cause of rotating speed adjustable, the consumed power of drive unit can further reduce again simultaneously.

Claims (10)

1. a control circuit is used for a drive unit, and this drive unit comprises a plurality of coils, and this control circuit comprises, and a temperature sensing module in order to sensing one ambient temperature, and produces a temperature signal; An and adjusting module, be coupled to these coils, in order in response to one of these these coils of temperature signal conversion connected mode, to adjust one of this drive unit resistance value, it is characterized in that: described these coils comprise one first coil and one second coil, this drive unit more comprises a switch module, this adjusting module is adjusted signal with this switch module of conducting because of this temperature signal output one, make this first coil and this second coil see through this switch module and couple, to adjust the resistance value of this drive unit with series system.
2. a control circuit is used for a drive unit, and this drive unit comprises a plurality of coils, and this control circuit comprises, and a temperature sensing module in order to sensing one ambient temperature, and produces a temperature signal; An and adjusting module, be coupled to these coils, in order in response to one of these these coils of temperature signal conversion connected mode, to adjust one of this drive unit resistance value, it is characterized in that: described these coils comprise one first coil and one second coil, this drive unit more comprises one first switch module and a second switch assembly, this adjusting module is adjusted signal with this first switch module of conducting and this second switch assembly in response to this temperature signal output one, in order to do this first coil and this second coil are coupled with parallel way through this first switch module and this second switch assembly, to adjust the resistance value of this drive unit.
3. control circuit according to claim 1 and 2 is characterized in that: one of them is a metal-oxide half field effect transistor for described these switch modules.
4. control circuit according to claim 3 is characterized in that: described this drive unit is a fan, and this adjusting module is a resistance value of adjusting this fan in response to this temperature signal, with one of this fan of conversion rotating speed.
5. control circuit according to claim 4 is characterized in that: described this adjusting module is more with the rotating speed of this fan of pulse-width modulation mode conversion.
6. a drive unit includes a plurality of coils and control circuit, and described control circuit includes a temperature sensing module, in order to the testing environment temperature, and produces a temperature signal; And adjusting module, be coupled to these coils, in order in response to one of these these coils of temperature signal conversion connected mode, to adjust one of this drive unit resistance value, it is characterized in that: described these coils comprise one first coil and one second coil, this drive unit more comprises a switch module, the adjusting module of this control circuit is adjusted signal with this switch module of conducting in response to this temperature signal output one, make this first coil and this second coil see through this switch module and couple, to adjust the resistance value of this drive unit with series system.
7. a drive unit includes a plurality of coils and control circuit, and described control circuit includes a temperature sensing module, in order to the testing environment temperature, and produces a temperature signal; And adjusting module, be coupled to these coils, in order in response to one of these these coils of temperature signal conversion connected mode, to adjust one of this drive unit resistance value, it is characterized in that: described these coils comprise one first coil and one second coil, this drive unit more comprises one first switch module and a second switch assembly, the adjusting module of this control circuit is adjusted signal with this first switch module of conducting and this second switch assembly in response to this temperature signal output one, this first coil and this second coil are coupled, to adjust the resistance value of this drive unit with parallel way through this first switch module and this second switch assembly.
8. drive unit according to claim 7 is characterized in that: one of them is a metal-oxide half field effect transistor for described these switch modules.
9. drive unit according to claim 7 is characterized in that: described this drive unit is a fan, and this adjusting module is a resistance value of adjusting this fan in response to this temperature signal, with one of this fan of conversion rotating speed.
10. drive unit according to claim 9 is characterized in that: described this adjusting module is more with the rotating speed of this fan of pulse-width modulation mode conversion.
CN2007101240587A 2007-10-22 2007-10-22 Control circuit and driving device including the same CN101174808B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2007101240587A CN101174808B (en) 2007-10-22 2007-10-22 Control circuit and driving device including the same

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN2007101240587A CN101174808B (en) 2007-10-22 2007-10-22 Control circuit and driving device including the same
US12/052,778 US20090104016A1 (en) 2007-10-22 2008-03-21 Control Circuit and Fan Comprising the Same

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CN101174808A CN101174808A (en) 2008-05-07
CN101174808B true CN101174808B (en) 2011-12-21

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CN102129262A (en) * 2010-01-20 2011-07-20 鸿富锦精密工业(深圳)有限公司 Temperature control system
KR20130007819A (en) * 2011-07-11 2013-01-21 현대자동차주식회사 Cooling apparatus and cooling methoed for power-pack in hybrid vehicle

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US20090104016A1 (en) 2009-04-23

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