CN1755381A - Electronic apparatus aging method based on heat radiator - Google Patents
Electronic apparatus aging method based on heat radiator Download PDFInfo
- Publication number
- CN1755381A CN1755381A CN 200410084825 CN200410084825A CN1755381A CN 1755381 A CN1755381 A CN 1755381A CN 200410084825 CN200410084825 CN 200410084825 CN 200410084825 A CN200410084825 A CN 200410084825A CN 1755381 A CN1755381 A CN 1755381A
- Authority
- CN
- China
- Prior art keywords
- electronic equipment
- temperature
- aging
- power amplifier
- heat abstractor
- 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.)
- Granted
Links
Images
Landscapes
- Testing Of Individual Semiconductor Devices (AREA)
Abstract
The invention provides an aging method based on the electric device with heat receiver, which makes the electric device on working condition at normal temperature environment and controls the heat receiver of the electric device to age the electric device.
Description
Technical field
The present invention relates to technical field of electronic equipment, be specifically related to a kind of aging method of the electronic equipment based on heat abstractor.
Background technology
In the base station of wireless communication system, power amplifier is one of module that power maximum, technology are the most complicated, configuration quantity is maximum, price is the most expensive.
Characteristics according to electronic product, the life cycle curve of power amplifier as shown in Figure 1, from Fig. 1, can obviously find out, power amplifier is that the crash rate of earlier failure period is very high at the use initial stage, is tiding over the initial failure after date, when entering into the useful life period of power amplifier, power amplifier enters into reliable work period, crash rate is approximately a constant, and power amplifier operates steadily, good reliability.
At present, power amplifier is passed through earlier failure period before manufacturer promptly is delivered for use, the main method that allows power amplifier be operated in useful life period when being delivered for use is: aging.Power amplifier is worn out, become in the power amplifier production run one important must be through link.
The existing method that power amplifier is worn out is that power amplifier is placed in the special high temperature ageing room, and resources such as use electric energy heat, and make the environment temperature in the high temperature ageing room keep constant high temperature, and power amplifier is moved under output rating.
Because the volume of power amplifier is big, so when producing power amplifier in enormous quantities, need to build a large amount of special high temperature ageing rooms, simultaneously, because the high temperature ageing room needs good closure to keep steady temperature, bring inconvenience to the real-time monitoring to power amplifier work state in the ageing process, if power amplifier breaks down in ageing process, be difficult to timely discovery, generally only after ageing process finishes for a long time, when power amplifier is tested, can find problematic power amplifier, it is keeped in repair, not only cause invalid ageing process, also waste time, the space in waste resource such as electric energy and high temperature ageing room.
In sum, the aging method of existing power amplifier owing to the construction cost height in high temperature ageing room, in a large number make the heating of electricity consumption equal energy source, have unnecessary reasons such as ageing process, make the ageing efficiency of power amplifier low, production cost is high, and become the bottleneck that power amplifier is produced in enormous quantities.
Summary of the invention
The objective of the invention is to, a kind of aging method of the electronic equipment based on heat abstractor is provided, the heat that self produces when utilizing electronic equipment in working order wears out to it, to simplify the aging method of electronic equipment, reduces the production cost of electronic equipment.
For achieving the above object, the aging method of a kind of electronic equipment based on heat abstractor provided by the invention comprises:
Make electronic equipment in running order under normal temperature environment, the heat abstractor of control electronic equipment wears out to electronic equipment.
Described electronic equipment comprises: the power amplifier in the base station of wireless communication system.
The described electronic equipment in running order step under normal temperature environment that makes comprises:
Described electronic equipment is placed normal temperature environment, and described electronic equipment is worked under its output rating.
Described heat abstractor comprises: radiator fan.
Described method also comprises:
Determine the aging temperature of described electronic equipment, and monitor the temperature of described electronic equipment.
The heat abstractor of described control electronic equipment, the step that electronic equipment is worn out is specially:
Control the rotating speed of described electronic equipment dissipating heat fan according to the temperature of the electronic equipment of the aging temperature of described electronic equipment, described monitoring, described electronic equipment is worn out.
The step of the rotating speed of the described electronic equipment dissipating heat fan of described control further comprises:
Adjust accordingly according to the rotating speed of predetermined adjustment rotating speed described electronic equipment dissipating heat fan; Or
According to the adjustment rotating speed of the temperature computation radiator fan of the electronic equipment of the aging temperature of described electronic equipment, described monitoring, and adjust accordingly according to the adjustment rotating speed of described calculating rotating speed to described electronic equipment dissipating heat fan.
The heat abstractor of described control electronic equipment, the step that electronic equipment is worn out is specially:
Control described radiator fan according to desired speed work;
According to the aging temperature of described electronic equipment output power, described electronic equipment is worn out at the described electronic equipment of output rating inner control of described electronic equipment.
The step of the output power of the described electronic equipment of described control further comprises:
Adjust accordingly according to the output power of predetermined adjustment power described electronic equipment; Or
According to the adjustment power of the temperature computation electronic equipment of the electronic equipment of the aging temperature of described electronic equipment, described monitoring, and adjust accordingly according to the adjustment power of described calculating output power to described electronic equipment.
Described method also comprises:
Monitor the duty of described electronic equipment;
When monitoring described electronic device works when unusual, stop described aging process.
Description by technique scheme can learn obviously that the present invention makes electronic equipment under normal temperature environment by the heat abstractor of control electronic equipment, utilizes its heat that self produces down in working order to get final product so that electronic equipment is finished ageing process; Especially when the volume of electronic equipment is big, power amplifier as base station in the wireless communication system, because the present invention can make power amplifier wear out under normal temperature environment, the cost in a large amount of construction high temperature ageings room and the resources such as electric energy that the high temperature ageing room is heated have been saved, for the production in enormous quantities of power amplifier and put into effect and have laid a good foundation, and the present invention can also monitor the power amplifier in the ageing process easily in real time, avoided invalid ageing process; The present invention can realize the aging of electronic equipment by the rotating speed of control radiator fan, the rotating speed and the output power of control radiator fan, and implementation method is simple, implementation procedure is flexible; Thereby realized simplifying the purpose of the production cost of the aging method of electronic equipment, the ageing efficiency that improves electronic equipment, reduction electronic equipment by technical scheme provided by the invention.
Description of drawings
Fig. 1 is the life cycle curve synoptic diagram of power amplifier;
Fig. 2 is the aging process flow diagram 1 of realization power amplifier of the present invention;
Fig. 3 is the aging process flow diagram 2 of realization power amplifier of the present invention.
Embodiment
Electronic equipment all can produce certain heat in working order down, powerful electronic equipment in working order down, when especially being operated in its output rating, the heat that himself produces is very big, power amplifier as base station in the wireless communication system, himself be exactly a powerful module, its heating under in working order is very serious.
The heat that produces when making electronic device works can in time distribute, and gives the working environment of a preference temperature of electronic equipment, all can dispose heat abstractor in the general electronic equipment, as radiator fan, louvre, heat radiator etc.
The present invention utilized electronic equipment to produce heat in when work just, have characteristics such as heat abstractor makes electronic equipment realize wearing out under normal temperature environment.
Core of the present invention is: make electronic equipment in running order under normal temperature environment, the heat abstractor of control electronic equipment wears out to electronic equipment.Thereby the present invention has avoided aging facilities such as construction high temperature ageing room, has saved resources such as electric energy.
Power amplifier with base station in the wireless communication system is an example below, and technical scheme provided by the invention is described in further detail.
Power amplifier is one of prominent equipment in the base station, when power amplifier carries out ageing process in the high temperature ageing room, temperature in the high temperature ageing room is generally 50～55 ℃, at this moment, the temperature of power discharging radiator substrate is generally 80 ℃～85 ℃, and we can be with 80 ℃～85 ℃ aging temperatures that are defined as power amplifier of temperature of power discharging radiator substrate.When power amplifier is worked under normal temperature environment, can produce a large amount of heats, the power amplifier internal configurations has radiator fan, radiator fan by the control power amplifier, can make the temperature that works in the power amplifier under the normal temperature environment reach its aging temperature equally, as the temperature that makes the power discharging radiator substrate remains on 80 ℃～85 ℃, thereby makes power amplifier carry out its ageing process under normal temperature environment, reaches the aging effect same in the high temperature ageing room with power amplifier.
When the present invention carries out ageing process at the heat that utilizes power amplifier self to produce, power amplifier is worked under its output rating, control the radiator fan of power amplifier again, can make power amplifier reach its aging temperature fast, begin the ageing process of power amplifier as early as possible.
The radiator fan of control power amplifier, the method that makes power amplifier finish its ageing process under normal temperature environment mainly contains two kinds:
Method one: power amplifier is placed normal temperature environment, determine the aging temperature of power amplifier, as 80 ℃～85 ℃ aging temperatures that are defined as power amplifier of temperature with the power discharging radiator substrate; Power amplifier is worked under the constant output power, as power amplifier is worked under its output rating, monitor the temperature of power discharging radiator substrate in real time by the CPU of power amplifier, adjust the rotating speed of radiator fan according to the temperature of the aging temperature of power amplifier, the power discharging radiator substrate that monitors, so that the temperature of power discharging radiator substrate remains on 80 ℃～85 ℃, make power amplifier carry out its ageing process.
The rotating speed of control radiator fan can for: adjust accordingly according to the rotating speed of predetermined adjustment rotating speed radiator fan, as when the temperature that monitors surpasses aging temperature, with the corresponding raising 5% of the rotating speed of radiator fan, when the temperature that monitors is lower than aging temperature, with the corresponding reduction by 5% of the rotating speed of radiator fan.
The rotating speed of control radiator fan also can for: adjust accordingly according to the rotating speed of the adjustment rotating speed that calculates, calculate the adjustment rotating speed of radiator fan etc. as aging temperature according to temperature that monitors and power amplifier to radiator fan.
Utilize flow process that method one realizes that power amplifier finishes its ageing process under normal temperature environment as shown in Figure 2.
In Fig. 2, step 200 determines that the temperature of power discharging radiator substrate is the aging temperature of power amplifier for 80 ℃～85 ℃, and power amplifier is worked under its specified output power.
To step 210, the CPU of power amplifier monitors the temperature of power discharging radiator substrate in real time.
To step 220, the temperature of the power discharging radiator substrate of judging the aging temperature of power amplifier and monitoring, surpass 80 ℃ if the temperature of the power discharging radiator substrate that monitors reaches, then arrive step 221, according to the adjustment rotating speed of being scheduled to the corresponding reduction of the rotating speed of power amplifier radiator fan.
In step 220, if the temperature of the power discharging radiator substrate that monitors then arrives step 222 between 80 ℃～85 ℃, the rotating speed of power amplifier radiator fan is not adjusted, keep the original rotating speed of radiator fan.
In step 220, if the temperature of the power discharging radiator substrate that monitors surpasses 85 ℃, then arrive step 223, according to the adjustment rotating speed of being scheduled to the corresponding raising of the rotating speed of power amplifier radiator fan.
Certainly, if need in actual applications according to the temperature of the power discharging radiator substrate that monitors, the adjustment rotating speed that aging temperature calculates radiator fan, then step 221 and step 223 also can for: according to the temperature of the power discharging radiator substrate that monitors, the adjustment rotating speed that aging temperature calculates radiator fan, and according to the adjustment rotating speed that calculates with corresponding reduction of the rotating speed of power amplifier radiator fan or raising.
Method two: power amplifier is placed normal temperature environment, determine the aging temperature of power amplifier, as 80 ℃～85 ℃ aging temperatures that are defined as power amplifier of temperature with the power discharging radiator substrate; Power amplifier is worked under the constant output power, as power amplifier is worked under its higher output power, the radiator fan of power amplifier is operated under the lower constant rotating speed, under such output power and rotation speed of the fan, the power discharging radiator substrate temperature can comparatively fast reach predetermined aging temperature; Monitor the temperature of power discharging radiator substrate in real time by the CPU of power amplifier, adjust the output power of power amplifier according to the temperature of the aging temperature of power amplifier, the power discharging radiator substrate that monitors, so that the temperature of power discharging radiator substrate remains on 80 ℃～85 ℃, make power amplifier carry out its ageing process.
The output power of control power amplifier can for: adjust accordingly according to the output power of predetermined adjustment power power amplifier, as when the temperature that monitors surpasses aging temperature, the corresponding reduction by 5% of output power with power amplifier, when the temperature that monitors is lower than aging temperature, with the corresponding raising 5% of output power of power amplifier.
The output power of control power amplifier also can for: adjust accordingly according to the output power of the adjustment power that calculates, calculate the adjustment power of power amplifier etc. as aging temperature according to temperature that monitors and power amplifier to power amplifier.
In the adjustment process of above-mentioned output power to power amplifier, the output power of power amplifier can not surpass its output rating, avoids in ageing process power amplifier being caused harmful effect at aspects such as serviceable lifes.
Utilize flow process that method two realizes that power amplifier finishes its ageing process under normal temperature environment as shown in Figure 3.
In Fig. 3, step 300 determines that the temperature of power discharging radiator substrate is the aging temperature of power amplifier for 80 ℃～85 ℃, and power amplifier is worked under its higher output power, and the radiator fan of power amplifier is operated under the lower constant rotating speed.
To step 310, the CPU of power amplifier monitors the temperature of power discharging radiator substrate in real time.
To step 320, the temperature of the power discharging radiator substrate of judging the aging temperature of power amplifier and monitoring, do not surpass 80 ℃ if the temperature of the power discharging radiator substrate that monitors reaches, then arrive step 321, according to of the output power corresponding raising of predetermined adjustment power power amplifier.
In step 320, if the temperature of the power discharging radiator substrate that monitors then arrives step 322 between 80 ℃～85 ℃, the output power of power amplifier is not adjusted, make power amplifier keep original output power to work on.
In step 320, if the temperature of the power discharging radiator substrate that monitors surpasses 85 ℃, then arrive step 323, according to of the corresponding reduction of output power of predetermined adjustment power with power amplifier.
Certainly, if need in actual applications according to the temperature of the power discharging radiator substrate that monitors, the adjustment rotating speed that aging temperature calculates radiator fan, then step 321 and step 323 also can for: according to the temperature of the power discharging radiator substrate that monitors, the adjustment power that aging temperature calculates power amplifier, and according to output power corresponding raising or the reduction of the adjustment power that calculates with power amplifier.
Also said method one and method two can be combined use actual in should having, promptly in application process by simultaneously/adjust the rotating speed of radiator fan respectively and the output power of power amplifier makes the temperature of power discharging radiator substrate remain on aging temperature, to carry out the ageing process of power amplifier; Work under its specified maximum power output as at first making power amplifier, if can not make the temperature of power discharging radiator substrate be lower than 85 ℃ all the time, then adopt the method that reduces the power amplifier output power that the temperature of power discharging radiator substrate is remained between 80 ℃～85 ℃ by the rotating speed of adjusting fan; For another example, power amplifier is worked under its higher output power, and the radiator fan of power amplifier worked under a lower constant rotating speed, if can not make the temperature of power discharging radiator substrate reach 80 ℃ all the time, then adopt the method that reduces the power amplifier radiating fan rotation speed that the temperature of power discharging radiator substrate is remained between 80 ℃～85 ℃ by the output power of adjusting power amplifier.
Because the present invention can carry out the ageing process of power amplifier in open normal temperature environment, so, can monitor in real time the duty of the power amplifier in the ageing process easily, as the output power that detects power amplifier, voltage, electric current, alarm indication etc.In a single day in monitor procedure, find that the appearance of power amplifier is unusual, then can in time stop the ageing process of power amplifier, power amplifier is overhauled processing timely, avoided unnecessary ageing process, improve the ageing efficiency of power amplifier.
Though described the present invention by embodiment, those of ordinary skills know, the present invention has many distortion and variation and does not break away from spirit of the present invention, monitor the step of the temperature of power discharging radiator substrate in real time as the CPU that describes among the above-mentioned embodiment, also can wish that appended claim comprises these distortion and variation for CPU regularly detects the temperature of power discharging radiator substrate according to predetermined time interval.
Claims (10)
1, a kind of aging method of the electronic equipment based on heat abstractor is characterized in that comprising:
Make electronic equipment in running order under normal temperature environment, the heat abstractor of control electronic equipment wears out to electronic equipment.
2, the aging method of a kind of electronic equipment based on heat abstractor as claimed in claim 1 is characterized in that described electronic equipment comprises: the power amplifier in the base station of wireless communication system.
3, the aging method of a kind of electronic equipment based on heat abstractor as claimed in claim 1 or 2 is characterized in that the described electronic equipment in running order step under normal temperature environment that makes comprises:
Described electronic equipment is placed normal temperature environment, and described electronic equipment is worked under its output rating.
4, the aging method of a kind of electronic equipment based on heat abstractor as claimed in claim 1 or 2 is characterized in that described heat abstractor comprises: radiator fan.
5, the aging method of a kind of electronic equipment based on heat abstractor as claimed in claim 4 is characterized in that described method also comprises:
Determine the aging temperature of described electronic equipment, and monitor the temperature of described electronic equipment.
6, the aging method of a kind of electronic equipment based on heat abstractor as claimed in claim 5 is characterized in that the heat abstractor of described control electronic equipment, and the step that electronic equipment is worn out is specially:
Control the rotating speed of described electronic equipment dissipating heat fan according to the temperature of the electronic equipment of the aging temperature of described electronic equipment, described monitoring, described electronic equipment is worn out.
7, the aging method of a kind of electronic equipment based on heat abstractor as claimed in claim 6 is characterized in that the step of the rotating speed of the described electronic equipment dissipating heat fan of described control further comprises:
Adjust accordingly according to the rotating speed of predetermined adjustment rotating speed described electronic equipment dissipating heat fan; Or
According to the adjustment rotating speed of the temperature computation radiator fan of the electronic equipment of the aging temperature of described electronic equipment, described monitoring, and adjust accordingly according to the adjustment rotating speed of described calculating rotating speed to described electronic equipment dissipating heat fan.
8, the aging method of a kind of electronic equipment based on heat abstractor as claimed in claim 5 is characterized in that the heat abstractor of described control electronic equipment, and the step that electronic equipment is worn out is specially:
Control described radiator fan according to desired speed work;
According to the aging temperature of described electronic equipment output power, described electronic equipment is worn out at the described electronic equipment of output rating inner control of described electronic equipment.
9, the aging method of a kind of electronic equipment based on heat abstractor as claimed in claim 8 is characterized in that the step of the output power of the described electronic equipment of described control further comprises:
Adjust accordingly according to the output power of predetermined adjustment power described electronic equipment; Or
According to the adjustment power of the temperature computation electronic equipment of the electronic equipment of the aging temperature of described electronic equipment, described monitoring, and adjust accordingly according to the adjustment power of described calculating output power to described electronic equipment.
10, the aging method of a kind of electronic equipment based on heat abstractor as claimed in claim 1 or 2 is characterized in that described method also comprises:
Monitor the duty of described electronic equipment;
When monitoring described electronic device works when unusual, stop described aging process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410084825 CN100570387C (en) | 2004-09-30 | 2004-09-30 | A kind of aging method of the electronic equipment based on heat abstractor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410084825 CN100570387C (en) | 2004-09-30 | 2004-09-30 | A kind of aging method of the electronic equipment based on heat abstractor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1755381A true CN1755381A (en) | 2006-04-05 |
| CN100570387C CN100570387C (en) | 2009-12-16 |
Family
ID=36688789
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410084825 Expired - Fee Related CN100570387C (en) | 2004-09-30 | 2004-09-30 | A kind of aging method of the electronic equipment based on heat abstractor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100570387C (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102055416A (en) * | 2010-12-01 | 2011-05-11 | 中兴通讯股份有限公司 | Method and system for ageing radio-frequency power amplifier |
| CN102486338A (en) * | 2010-12-06 | 2012-06-06 | 西安大昱光电科技有限公司 | Hot air internal recycling high-temperature ageing room |
| CN102541110A (en) * | 2010-12-23 | 2012-07-04 | 中兴通讯股份有限公司 | Device and method for testing temperature control based on temperature derating curve of modular power supply |
| CN103134832A (en) * | 2011-11-28 | 2013-06-05 | 古河奇宏电子（苏州）有限公司 | Detecting method for shortening thermal property detecting time of heat sink assembly |
| CN107168400A (en) * | 2017-03-29 | 2017-09-15 | 联想(北京)有限公司 | A kind of signal control method and electronic equipment |
| CN107861041A (en) * | 2017-09-21 | 2018-03-30 | 全球能源互联网研究院有限公司 | A kind of high temperature reverse bias test system and method |
| CN108037398A (en) * | 2018-01-16 | 2018-05-15 | 昆山精讯电子技术有限公司 | A kind of display module ageing tester and ageing testing method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002022796A (en) * | 2000-07-11 | 2002-01-23 | Furukawa Electric Co Ltd:The | Aging testing jig for semiconductor element |
-
2004
- 2004-09-30 CN CN 200410084825 patent/CN100570387C/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102055416A (en) * | 2010-12-01 | 2011-05-11 | 中兴通讯股份有限公司 | Method and system for ageing radio-frequency power amplifier |
| CN102486338A (en) * | 2010-12-06 | 2012-06-06 | 西安大昱光电科技有限公司 | Hot air internal recycling high-temperature ageing room |
| CN102541110A (en) * | 2010-12-23 | 2012-07-04 | 中兴通讯股份有限公司 | Device and method for testing temperature control based on temperature derating curve of modular power supply |
| CN102541110B (en) * | 2010-12-23 | 2014-11-05 | 中兴通讯股份有限公司 | Device and method for testing temperature control based on temperature derating curve of modular power supply |
| CN103134832A (en) * | 2011-11-28 | 2013-06-05 | 古河奇宏电子（苏州）有限公司 | Detecting method for shortening thermal property detecting time of heat sink assembly |
| CN107168400A (en) * | 2017-03-29 | 2017-09-15 | 联想(北京)有限公司 | A kind of signal control method and electronic equipment |
| CN107861041A (en) * | 2017-09-21 | 2018-03-30 | 全球能源互联网研究院有限公司 | A kind of high temperature reverse bias test system and method |
| CN108037398A (en) * | 2018-01-16 | 2018-05-15 | 昆山精讯电子技术有限公司 | A kind of display module ageing tester and ageing testing method |
| CN108037398B (en) * | 2018-01-16 | 2023-12-05 | 苏州精濑光电有限公司 | Aging test device and aging test method for display module |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100570387C (en) | 2009-12-16 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1892136A (en) | Cogeneration system and method for controlling the same | |
| CN1250053C (en) | Networkable power controller | |
| CN114928924B (en) | Intelligent street lamp control system based on urban road management | |
| CN104089378B (en) | The control method of PV air-conditioner system, control device and PV air-conditioner system | |
| CN1548856A (en) | Air conditioner cooling and heating device utilizing hydrogen-storage alloy technology and control method thereof | |
| CN1755381A (en) | Electronic apparatus aging method based on heat radiator | |
| CN1152608C (en) | Energy-saving intelligent lighting control system | |
| CN1694595A (en) | Distributed streetlight energy-saving control system | |
| CN101192065B (en) | Heat radiating fan control device and method | |
| CN103266946A (en) | Engine active temperature control system and control method thereof | |
| CN1838206A (en) | Method and apparatus for realizing multi-meaning display by seven segment digital tubes | |
| CN1854629A (en) | Waste-energy reclaiming wind-power generator structure and method for radiating or ventilator set of air conditioner | |
| CN1758171A (en) | Method for automatic fine regulating rotation speed of heat radiation fan | |
| CN203321655U (en) | Active temperature control system of engine | |
| CN1423433A (en) | Outdoor communication equipment environment and power apparatus monitoring method and system | |
| CN201606846U (en) | Large power LED street lamp based on quick heat conduction and radiation of heat pipe | |
| CN1566824A (en) | Central management method for multi-room air-conditioner | |
| CN1753271A (en) | Distribution type programmable energy source system and its utilization method | |
| CN221127240U (en) | High-concentration photovoltaic radiator | |
| CN1170092C (en) | Control method and device for supplying energy to heat source set of air conditioning system according to output power | |
| CN204143153U (en) | Ultraviolet LED lamp exposure modified machine | |
| CN1295912A (en) | Injection machine energy-saving device and method based on frequency-converting speed regulator | |
| CN108334175A (en) | A kind of notebook intelligent heat dissipation pedestal and its control method | |
| CN204109741U (en) | A kind of hybrid vehicle cooling system | |
| CN207599572U (en) | A kind of lithium battery solar street lamp |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20091216 Termination date: 20100930 |