CN104679063A - Temperature control circuit - Google Patents
Temperature control circuit Download PDFInfo
- Publication number
- CN104679063A CN104679063A CN201310607154.2A CN201310607154A CN104679063A CN 104679063 A CN104679063 A CN 104679063A CN 201310607154 A CN201310607154 A CN 201310607154A CN 104679063 A CN104679063 A CN 104679063A
- Authority
- CN
- China
- Prior art keywords
- circuit
- temperature
- transistor
- resistance
- reference resistance
- 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
Links
Landscapes
- Control Of Temperature (AREA)
Abstract
The invention provides a temperature control circuit comprising a temperature detecting circuit, a signal processing circuit, a heating circuit, and a cooling circuit. The temperature detecting circuit detects the ambient temperature of an electronic device. When the ambient temperature is lower than a first preset temperature, the signal processing circuit outputs a corresponding heating signal and a corresponding cooling stopping signal to respectively control the heating circuit to be in a heating state and control the cooling circuit to stop cooling. When the ambient temperature is higher than a second preset temperature, the signal processing circuit outputs a corresponding heating stopping signal and a corresponding cooling signal to respectively control the heating circuit to stop heating and control the cooling circuit to be in a cooling state. When the ambient temperature is between the first preset temperature and the second preset temperature, the signal processing circuit outputs a corresponding heating stopping signal and a corresponding cooling stopping signal to respectively control the heating circuit to stop heating and control the cooling circuit to stop cooling. The temperature control circuit of the invention is simple in structure and low in overall cost.
Description
Technical field
The present invention relates to a kind of temperature-control circuit.
Background technology
The condition of work that any electronic component or equipment have it suitable, if operate in outside its condition of work, just may cause product instability or life-span to reduce.Because the attribute of product is different, to such an extent as to the ambient temperature conditions that product uses also is not quite similar.Such as many security monitoring products are erected at open air.Therefore, if product is under the environment of high temperature or low temperature, still its system stability and reliability can be kept, its value of the product certainly will be can promoted.
At present, corresponding temperature-control circuit is normally set in the industry, to regulate the working temperature of this electronic equipment.But this kind of temperature-control circuit is made up of the element such as single-chip microcomputer, processor, and its circuit structure is comparatively complicated, and cost is higher.
Summary of the invention
In view of the above circumstances, be necessary to provide a kind of temperature-control circuit that electronic equipment all can normally be worked under high temperature and low temperature.
A kind of temperature-control circuit, comprise temperature detection circuit, signal processing circuit, heater circuit and radiating circuit, described temperature detection circuit detects the environment temperature residing for an electronic equipment, when described temperature detection circuit detects described environment temperature lower than first preset temperature, this signal processing circuit exports corresponding heating signal and stops radiated signal, is in heated condition and radiating circuit stops heat radiation to control described heater circuit respectively; When described temperature detection circuit detects described environment temperature higher than second preset temperature, this signal processing circuit exports corresponding stopping heating signal and radiated signal, and to control described heater circuit stopping heating respectively, radiating circuit is in radiating state; When described temperature detection circuit detect described environment temperature be between the first preset temperature and the second preset temperature time, this signal processing circuit exports and stops heating signal accordingly and stop radiated signal, stops heating and radiating circuit stopping heat radiation to control described heater circuit.
Said temperature control circuit is by arranging this heater circuit and radiating circuit, with when environment temperature is lower than the first preset temperature, only open this heater circuit, and when environment temperature is more than the second preset temperature, only open this radiating circuit, to regulate the environment temperature residing for this electronic equipment, make this electronic equipment at any temperature (high temperature or low temperature), all normally can work, effectively improve stability and the serviceable life of this electronic equipment, promote the value of the product of this electronic equipment.
Accompanying drawing explanation
Fig. 1 is the functional block diagram of the temperature-control circuit of better embodiment of the present invention.
Fig. 2 is the circuit diagram of temperature-control circuit shown in Fig. 1.
Main element symbol description
| Temperature-control circuit | 100 |
| Temperature detection circuit | 11 |
| Power supply | Vcc |
| Thermistor | RT |
| Divider resistance | R0 |
| Signal processing circuit | 13 |
| First reference circuit | 131 |
| First reference resistance | R f1 |
| Second reference resistance | R f2 |
| Second reference circuit | 133 |
| 3rd reference resistance | R f3 |
| 4th reference resistance | R f4 |
| First comparer | A1 |
| Second comparer | A2 |
| The first transistor | Q1 |
| Transistor seconds | Q2 |
| First pull-up resistor | R H1 |
| Second pull-up resistor | R H2 |
| Heater circuit | 15 |
| Third transistor | Q3 |
| Well heater | H |
| Radiating circuit | 17 |
| 4th transistor | Q4 |
| Heating radiator | S |
| Auxiliary circuit | 18 |
| Control end | contr |
| 5th transistor | Q5 |
| Resistance | R1 |
| Output terminal | out |
Following embodiment will further illustrate the present invention in conjunction with above-mentioned accompanying drawing.
Embodiment
Please refer to Fig. 1, better embodiment of the present invention provides a kind of temperature-control circuit 100, for regulating the environment temperature residing for an electronic equipment (not shown), it thinks that this electronic equipment provides suitable working temperature that electronic equipment is normally run.This temperature-control circuit 100 comprises temperature detection circuit 11, signal processing circuit 13, heater circuit 15 and radiating circuit 17.
Refer to Fig. 2, this temperature detection circuit 11 comprises thermistor RT and divider resistance R0.Wherein this thermistor RT is the thermistor of a negative temperature coefficient, and in order to the environment temperature residing for induced electricity subset, when namely temperature is higher, its impedance is lower, and when temperature is lower, its impedance is higher.One end of this thermistor RT is connected to a power supply Vcc by this divider resistance R0, other end ground connection.So, the voltage of the output terminal (namely between this divider resistance R0 and thermistor RT) of this temperature detection circuit 11 will improve with environment temperature and reduce.
This signal processing circuit 13 comprises the first reference circuit 131, second reference circuit 133, first comparer A1, the second comparer A2, the first transistor Q1, transistor seconds Q2, the first pull-up resistor R
h1and the second pull-up resistor R
h2.This first reference circuit 131 comprises the first reference resistance R
f1and the second reference resistance R
f2.This first reference resistance R
f1one end be connected to this power supply Vcc.This first reference resistance R
f1the other end by this second reference resistance R
f2ground connection.This first reference resistance R
f1and the second reference resistance R
f2between to be connected to the negative input of this first comparer A1 as the output terminal of this first reference circuit 131, think that this first comparer A1 provides the first reference voltage.This second reference circuit 133 comprises the 3rd reference resistance R
f3and the 4th reference resistance R
f4.3rd reference resistance R
f3one end be connected to this power supply Vcc.3rd reference resistance R
f3the other end by the 4th reference resistance R
f4ground connection.3rd reference resistance R
f3and the 4th reference resistance R
f4between to be connected to the positive input of this second comparer A2 as the output terminal of this second reference circuit 133, think that this second comparer A2 provides the second reference voltage.The positive input of this first comparer A1 and the negative input of this second comparer A2 are all connected to the output terminal of this temperature detection circuit 11, namely between this divider resistance R0 and thermistor RT.
This first transistor Q1 and transistor seconds Q2 is N channel field-effect pipe.The grid of this first transistor Q1 is connected to the output terminal of this first comparer A1.The drain electrode of this first transistor Q1 is by this first pull-up resistor R
h1be connected to this power supply Vcc.The source ground of this first transistor Q1.The grid of this transistor seconds Q2 is connected to the output terminal of this second comparer A2, and the drain electrode of this transistor seconds Q2 is by this second pull-up resistor R
h2be connected to this power supply Vcc.The source ground of this transistor seconds Q2.The drain electrode of this first transistor Q1 is also connected to described heater circuit 15, for the first output terminal as described signal processing circuit 13, to export a corresponding heating signal or to stop heating signal to heater circuit 15, and then control unlatching or the closedown of described heater circuit 15, make heater circuit 15 correspondence be in heated condition or stop heating.In addition, the drain electrode of this transistor seconds Q2 is also connected to described radiating circuit 17, for the second output terminal as described signal processing circuit 13, to export a corresponding radiated signal or to stop radiated signal to radiating circuit 17, and then control unlatching and the closedown of described radiating circuit 17, make radiating circuit 17 correspondence be in radiating state or stop heat radiation.
This heater circuit 15 comprises third transistor Q3 and heater H.This third transistor Q3 is the field effect transistor of P-channel enhancement type.The grid of this third transistor Q3 is connected to this first output terminal, i.e. the drain electrode of the first transistor Q1.The source electrode of this third transistor Q3 is connected to power supply Vcc.The drain electrode of this third transistor Q3 is by described heater H ground connection.
This radiating circuit 17 comprises the 4th transistor Q4 and heating radiator S.4th transistor Q4 is the field effect transistor of P-channel enhancement type.The grid of the 4th transistor Q4 is connected to this second output terminal, i.e. the drain electrode of transistor seconds Q2.The source electrode of the 4th transistor Q4 is connected to power supply Vcc.The drain electrode of the 4th transistor Q4 is by described heating radiator S ground connection.
Below the principle of work of this temperature-control circuit 100 is described in detail.
When described temperature detection circuit 11 detects environment temperature residing for this electronic equipment lower than first preset temperature, this temperature detection circuit 11 exports the detecting voltage of a correspondence, and this detecting voltage is greater than this first reference voltage.This first comparer A1 exports a high level signal.So, this first transistor Q1 conducting.This first output terminal exports a low level signal by the first transistor Q1 ground connection of conducting, i.e. heating signal.This heating signal controls this third transistor Q3 conducting, makes this heater H start heating, to regulate the environment temperature residing for this electronic equipment.Meanwhile, the detecting voltage exported due to this temperature detection circuit 11 is greater than the second reference voltage.This second comparer A2 exports a low level signal.This transistor seconds Q2 ends, and this second output terminal is by the second pull-up resistor R
h2be connected to power supply Vcc and export a high level signal, namely stopping radiated signal.This stopping radiated signal controlling the 4th transistor Q4 to be ended, and makes this heating radiator S stop heat radiation.
When described temperature detection circuit 11 detects environment temperature residing for this electronic equipment higher than second preset temperature, this temperature detection circuit 11 exports the detecting voltage of a correspondence, and this detecting voltage is less than this first reference voltage.This first comparer A1 exports a low level signal.So, this first transistor Q1 ends, and this first output terminal passes through by the first pull-up resistor R
h1be connected to power supply Vcc and export a high level signal, namely stopping heating signal.This stopping heating signal controlling this third transistor Q3 to be ended, and makes this heater H stop heating.Meanwhile, the detecting voltage that this temperature detection circuit 11 exports is greater than the second reference voltage.This second comparer A2 exports a high level signal.So, this transistor seconds Q2 conducting, this second output terminal exports a low level signal by the transistor seconds Q2 ground connection of conducting, i.e. radiated signal.This radiated signal controls the 4th transistor Q4 conducting, makes this heating radiator S start heat radiation.
In addition, when described temperature detection circuit 11 environment temperature detected residing for this electronic equipment is between the first preset temperature and the second preset temperature, when being namely greater than the first preset temperature and being less than the second preset temperature.According to above-mentioned principle, the detecting voltage that this temperature detection circuit 11 exports is less than this first reference voltage.This first comparer A1 exports a low level signal.So, this first transistor Q1 ends.This first output terminal is by the first pull-up resistor R
h1be connected to power supply Vcc and export a high level signal, namely stopping heating signal.This stopping heating signal controlling this third transistor Q3 to be ended, and makes this heater H stop heating.Meanwhile, this second comparer A2 output low level signal.This transistor seconds Q2 ends.This second output terminal is by the second pull-up resistor R
h2be connected to power supply Vcc and export a high level signal, namely stopping radiated signal.This stopping radiated signal controlling the 4th transistor Q4 to be ended, and makes this heating radiator S stop heat radiation.
In embodiments of the present invention, this first preset temperature can be 0 DEG C, and this second preset temperature can be 50 DEG C.Because this thermistor RT is in 0 DEG C, its resistance is about 30k ohm, is 4k ohm 50 DEG C time.Therefore, when the first preset temperature is 0 DEG C, when the second preset temperature is 50 DEG C, can by divider resistance R0, the first reference resistance R
f1, the 3rd reference resistance R
f3resistance be set to the same, i.e. R0=R
f1=R
f3, and by the second reference resistance R
f2resistance be set to 30k ohm, the 4th reference resistance R
f4resistance be set to 4k ohm.
In other embodiments of the present invention, this temperature-control circuit 100 also comprises an auxiliary circuit 18.This auxiliary circuit 18 is connected to heater circuit 15 or radiating circuit 17, for all quitting work when described heater circuit 15 and radiating circuit 17, namely, when the environment temperature residing for electronic equipment is between the first preset temperature and the second preset temperature, starts according to user's request or close this heater circuit 15 or radiating circuit 17.This auxiliary circuit 18 comprises control end contr, the 5th transistor Q5, resistance R1 and output terminal out.The grid of the 5th transistor Q5 is connected to this control end contr.The source ground of the 5th transistor Q5, and the grid being connected to the 5th transistor Q5 by this resistance R1.The drain electrode of the 5th transistor Q5 is connected to output terminal out.So, the output terminal out of this auxiliary circuit 18 is connected to the grid of this third transistor Q3 or the grid of the 4th transistor Q4, to be controlled unlatching or the closedown of this heater circuit 15 or radiating circuit 17 by this control end contr.Such as, in the present embodiment, be illustrated for the grid output terminal out of this auxiliary circuit 18 being connected to this third transistor Q3.So, when this control end contr exports a high level signal, the 5th transistor Q5 conducting, makes the conducting by the 5th transistor Q5 ground connection of conducting of the grid of this third transistor Q3, makes this heater H start heating.And when this control end contr exports a low level signal, the 5th transistor Q5 ends, and then draw high the voltage of drain electrode of the 5th transistor Q5, this third transistor Q3 ends, and makes this heater H stop heating.
Temperature-control circuit 100 of the present invention, by arranging this heater circuit 15 and radiating circuit 17, with when environment temperature is lower than the first preset temperature, only opens this heater circuit 15; When environment temperature is more than the second preset temperature, only open this radiating circuit 17, to regulate the environment temperature residing for this electronic equipment, make this electronic equipment at any temperature (high temperature or low temperature), all can normally work, the stability of effective this electronic equipment of raising and serviceable life, promote the value of the product of this electronic equipment.In addition, this temperature-control circuit 100 is made up of simple resistance, transistor and comparer, and its circuit structure is simple, and holistic cost is lower.
Claims (10)
1. a temperature-control circuit, comprise temperature detection circuit, signal processing circuit, heater circuit and radiating circuit, described temperature detection circuit detects the environment temperature residing for an electronic equipment, when described temperature detection circuit detects described environment temperature lower than first preset temperature, this signal processing circuit exports corresponding heating signal and stops radiated signal, is in heated condition and radiating circuit stops heat radiation to control described heater circuit respectively; When described temperature detection circuit detects described environment temperature higher than second preset temperature, this signal processing circuit exports corresponding stopping heating signal and radiated signal, and to control described heater circuit stopping heating respectively, radiating circuit is in radiating state; When described temperature detection circuit detect described environment temperature be between the first preset temperature and the second preset temperature time, this signal processing circuit exports and stops heating signal accordingly and stop radiated signal, stops heating and radiating circuit stopping heat radiation to control described heater circuit.
2. temperature-control circuit as claimed in claim 1, it is characterized in that: this temperature detection circuit comprises thermistor and divider resistance, one end of this thermistor is connected to a power supply by this divider resistance, other end ground connection.
3. temperature-control circuit as claimed in claim 1, is characterized in that: thermistor is the thermistor of a negative temperature coefficient.
4. temperature-control circuit as claimed in claim 2, it is characterized in that: described signal processing circuit comprises the first reference circuit, second reference circuit, first comparer, second comparer, the first transistor, transistor seconds, first pull-up resistor and the second pull-up resistor, the output terminal of this first reference circuit is connected to the negative input of this first comparer, the output terminal of this second reference circuit is connected to the positive input of this second comparer, the positive input of this first comparer and the negative input of this second comparer are all connected between this divider resistance and thermistor, the grid of this first transistor is connected to the output terminal of this first comparer, the drain electrode of this first transistor is connected to this power supply by this first pull-up resistor, the source ground of this first transistor, the grid of this transistor seconds is connected to the output terminal of this second comparer, the drain electrode of this transistor seconds is connected to this power supply by this second pull-up resistor, the source ground of this transistor seconds, the drain electrode of this first transistor is connected to this heater circuit, and the drain electrode of this transistor seconds is connected to this radiating circuit.
5. temperature-control circuit as claimed in claim 4, is characterized in that: this first transistor and transistor seconds are the field effect transistor of N channel enhancement.
6. temperature-control circuit as claimed in claim 4, it is characterized in that: this first reference circuit comprises the first reference resistance and the second reference resistance, one end of this first reference resistance is connected to this power supply, the other end of this first reference resistance, by this second reference resistance ground connection, is connected to the negative input of this first comparer between this first reference resistance and the second reference resistance.
7. temperature-control circuit as claimed in claim 6, it is characterized in that: this second reference circuit comprises the 3rd reference resistance and the 4th reference resistance, one end of 3rd reference resistance is connected to this power supply, the other end of the 3rd reference resistance, by the 4th reference resistance ground connection, is connected to the positive input of this second comparer between the 3rd reference resistance and the 4th reference resistance.
8. temperature-control circuit as claimed in claim 7, it is characterized in that: the resistance of this divider resistance, the first reference resistance and the 3rd reference resistance is identical, the resistance of this second reference resistance is 30k ohm, and the resistance of the 4th reference resistance is 4k ohm.
9. temperature-control circuit as claimed in claim 4, it is characterized in that: this temperature-control circuit also comprises an auxiliary circuit, this auxiliary circuit is connected to heater circuit or radiating circuit, for when described heater circuit and radiating circuit all quit work, start according to user's request or close this heater circuit or radiating circuit.
10. temperature-control circuit as claimed in claim 9, it is characterized in that: this auxiliary circuit comprises control end, the 5th transistor, resistance and output terminal, the grid of the 5th transistor is connected to this control end, the source ground of the 5th transistor, and the grid of the 5th transistor is connected to by this resistance, the output terminal of this auxiliary circuit is connected to the drain electrode of the 5th transistor, and is connected to the grid of this third transistor or the grid of the 4th transistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310607154.2A CN104679063A (en) | 2013-11-27 | 2013-11-27 | Temperature control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310607154.2A CN104679063A (en) | 2013-11-27 | 2013-11-27 | Temperature control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104679063A true CN104679063A (en) | 2015-06-03 |
Family
ID=53314290
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310607154.2A Pending CN104679063A (en) | 2013-11-27 | 2013-11-27 | Temperature control circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104679063A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105138037A (en) * | 2015-08-17 | 2015-12-09 | 苏州经贸职业技术学院 | Constant-temperature respirator |
| CN105228412A (en) * | 2015-08-24 | 2016-01-06 | 中磊电子（苏州）有限公司 | Heater |
| CN107450627A (en) * | 2017-09-15 | 2017-12-08 | 京信通信***（中国）有限公司 | Temperature-control circuit |
| CN108574265A (en) * | 2017-03-13 | 2018-09-25 | 鸿富锦精密工业（深圳）有限公司 | Temperature protection circuit |
| CN109211963A (en) * | 2017-06-30 | 2019-01-15 | 上海新微技术研发中心有限公司 | System and method for detecting thermal resistance of heat-conducting material |
| CN110095155A (en) * | 2019-05-21 | 2019-08-06 | 深圳洲斯移动物联网技术有限公司 | A kind of control method, temperature-humidity detecting device and temperature/humiditydetection detection system |
| CN112346501A (en) * | 2019-08-07 | 2021-02-09 | 触景无限科技（北京）有限公司 | Heating system for low-temperature starting of electronic equipment |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6935572B1 (en) * | 2004-11-02 | 2005-08-30 | Lewis T. Smole | Temperature differential eliminator |
| CN102043413A (en) * | 2009-10-22 | 2011-05-04 | 鸿富锦精密工业（深圳）有限公司 | Temperature control circuit |
| CN102052341A (en) * | 2009-10-30 | 2011-05-11 | 鸿富锦精密工业（深圳）有限公司 | Fan control system |
| CN203054644U (en) * | 2012-11-28 | 2013-07-10 | 西安晶捷电子技术有限公司 | Temperature control system for heat pump electronic product aging room |
-
2013
- 2013-11-27 CN CN201310607154.2A patent/CN104679063A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6935572B1 (en) * | 2004-11-02 | 2005-08-30 | Lewis T. Smole | Temperature differential eliminator |
| CN102043413A (en) * | 2009-10-22 | 2011-05-04 | 鸿富锦精密工业（深圳）有限公司 | Temperature control circuit |
| CN102052341A (en) * | 2009-10-30 | 2011-05-11 | 鸿富锦精密工业（深圳）有限公司 | Fan control system |
| CN203054644U (en) * | 2012-11-28 | 2013-07-10 | 西安晶捷电子技术有限公司 | Temperature control system for heat pump electronic product aging room |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105138037B (en) * | 2015-08-17 | 2017-03-15 | 苏州经贸职业技术学院 | A kind of constant temperature mouth mask |
| CN105138037A (en) * | 2015-08-17 | 2015-12-09 | 苏州经贸职业技术学院 | Constant-temperature respirator |
| CN105228412B (en) * | 2015-08-24 | 2018-09-14 | 中磊电子（苏州）有限公司 | Heating device |
| CN105228412A (en) * | 2015-08-24 | 2016-01-06 | 中磊电子（苏州）有限公司 | Heater |
| US9791173B2 (en) | 2015-08-24 | 2017-10-17 | Sercomm Corporation | Heating device having heating transistor unit |
| CN108574265A (en) * | 2017-03-13 | 2018-09-25 | 鸿富锦精密工业（深圳）有限公司 | Temperature protection circuit |
| CN109211963A (en) * | 2017-06-30 | 2019-01-15 | 上海新微技术研发中心有限公司 | System and method for detecting thermal resistance of heat-conducting material |
| CN109211963B (en) * | 2017-06-30 | 2021-03-26 | 上海新微技术研发中心有限公司 | System and method for detecting thermal resistance of heat-conducting material |
| CN107450627A (en) * | 2017-09-15 | 2017-12-08 | 京信通信***（中国）有限公司 | Temperature-control circuit |
| CN107450627B (en) * | 2017-09-15 | 2022-09-16 | 京信网络***股份有限公司 | Temperature control circuit |
| CN110095155A (en) * | 2019-05-21 | 2019-08-06 | 深圳洲斯移动物联网技术有限公司 | A kind of control method, temperature-humidity detecting device and temperature/humiditydetection detection system |
| CN110095155B (en) * | 2019-05-21 | 2021-08-10 | 深圳洲斯移动物联网技术有限公司 | Control method, temperature and humidity detection device and temperature and humidity detection system |
| CN112346501A (en) * | 2019-08-07 | 2021-02-09 | 触景无限科技（北京）有限公司 | Heating system for low-temperature starting of electronic equipment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104679063A (en) | Temperature control circuit | |
| CN103835978B (en) | Fan control circuitry | |
| CN102109864B (en) | Temperature control circuit | |
| US8324855B2 (en) | Fan control system | |
| CN104639012B (en) | Overheating protection circuit based on speed instruction voltage and method for excessive heating protection | |
| CN102109863A (en) | Temperature control circuit | |
| CN105223989B (en) | A kind of constant-temperature heating system of adjustable temperature | |
| CN103807199B (en) | Fan control circuitry | |
| US8255091B2 (en) | Temperature control circuit | |
| CN203747171U (en) | Temperature control plug board | |
| CN102109862B (en) | Temperature control circuit and electronic equipment with same | |
| CN206340629U (en) | The heater and electronic equipment of battery | |
| CN104881096B (en) | Cooling system | |
| CN102043413A (en) | Temperature control circuit | |
| US8253072B2 (en) | Data input device | |
| CN104460900A (en) | Server with heat radiation control device | |
| CN205121401U (en) | Electric current source suitable for big current power device testing arrangement | |
| CN206314010U (en) | A kind of electronic equipment and its single-chip microcomputer heater circuit | |
| CN206075168U (en) | A kind of Along Railway Unattended communication room temperature-control circuit | |
| CN206144834U (en) | Electricity fan control circuit | |
| CN104597942A (en) | Temperature control circuit | |
| CN105652996A (en) | Fan power supply circuit | |
| CN205281389U (en) | Notebook computer heat dissipation base circuit of intelligence speed governing | |
| CN208939905U (en) | A kind of radio-frequency power amplifier | |
| CN206249130U (en) | A kind of overheating protection circuit for being applied to inverse-excitation type switch power-supply chip |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150603 |