CN203658555U - LED radiating module total thermal resistance measurement system - Google Patents
LED radiating module total thermal resistance measurement system Download PDFInfo
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- CN203658555U CN203658555U CN201320808138.5U CN201320808138U CN203658555U CN 203658555 U CN203658555 U CN 203658555U CN 201320808138 U CN201320808138 U CN 201320808138U CN 203658555 U CN203658555 U CN 203658555U
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Abstract
The utility model discloses an LED radiating module total thermal resistance measurement system which is easy for operation. The system comprises an LED radiating module, an environment simulation test box, a temperature recorder and a power supply control system. An inlet wind pressure flow stabilizing chamber, a test wind tunnel and an outlet wind pressure flow stabilizing chamber are arranged in the environment simulation test box. The test wind tunnel is respectively connected with the inlet wind pressure flow stabilizing chamber and the outlet wind pressure flow stabilizing chamber. A box body corresponding to the inlet wind pressure flow stabilizing chamber is provided with an air inlet. An air flow drive device and an air heating device are arranged in the air inlet. A box body corresponding to the outlet wind pressure flow stabilizing chamber is provided with an air outlet. An air temperature test point is arranged in the test wind tunnel. An LED radiating module is arranged in the test wind tunnel. Temperature measurement probes are arranged at a temperature measurement reference point of the LED radiating module and the air temperature test point. The temperature signal output end of each temperature measurement probe is connected with a thermocouple line of the temperature recorder. The system has the advantages of simple operation, low cost and effective, and reliable acquired data.
Description
Technical field
The utility model relates to LED technical field of performance test, particularly relates to a kind of LED radiating module entire thermal resistance measuring method and measuring system.
Background technology
Great power LED have low-power consumption, long-life, volume little, respond a series of significant performance advantages such as rapid, along with it is in the widespread use of multiple lighting fields, LED light fixture has become a kind of novel illumination product that is expected to the conventional light source such as replace incandescent, fluorescent light and Halogen lamp LED.Because the heat-sinking capability of LED can directly affect its performance index, serviceable life and functional reliability, therefore, the analysis of LED heat dispersion is most important.
In LED heat dispersion is analyzed, the heat-sinking capability under the size objective measurement different lamps structure of energy and the operating mode of entire thermal resistance numerical value, is regarded as a crucial measurement index conventionally.
At present, the radiating module that LED heat dispersion is measured is the radiating module being made up of plurality of LEDs, the measuring principle of its entire thermal resistance and step are: first, according to the feature that possesses good linear relation between LED junction temperature and test voltage, record the voltage temperature coefficient K of single LEDs of same batch; Then, in radiating module, a selected LEDs is representative sample, and cuts off the circuit board line at representative sample two ends, connects original circuit with fictitious load, and representative sample is connecting test port; With the original circuit of identical current drives and representative sample, and by voltage temperature coefficient K, test voltage while work by LED representative sample is counter infers to obtain its junction temperature data T
j; While reaching final stable state, by known environment temperature T
a, a LED number N and representative sample heating power Q
single, calculate LED chip to the total heat resistance R between environment by following formula
j-A:
In formula, the heating power Q of LED representative sample
singlebe approximately equal to input electric power P
e(driving voltage V
fand electric current I
fproduct) 0.7-0.9 doubly, i.e. η=0.7-0.9.
But there is following shortcoming in the enforcement of said method: (1) original circuit board line has been subject to being difficult to the destruction of reparation; (2) fictitious load is generally resistive element, and its operating characteristic and LED's is widely different, can not compensate the variation of original circuit; (3) LED representative sample is only one, and due to Steady-State Thermal Field non-uniform Distribution, therefore the difference of LED representative sample select location tends to show different junction temperature of chip, and it only can represent the junction temperature situation of present position; (4) the heating power Q of single LEDs
singleshould equal input electric power P
ewith luminous power P
ldifference, and the 0.7-0.9 that said method is merely approximately equal to electric power thermal power is doubly, and the setting of concrete multiplying power exists larger randomness, must introduce larger measuring error; (5) adjusting ambient temperature and air velocity etc. are crucial on a large scale affects parameter, often only limits to the natural convection situation under room temperature, and test condition and acquired results are less, and the analysis of subsequent affect trend is carried out in inconvenience; (6) experimental facilities that possesses entire thermal resistance measurement capability belongs to high value precision equipment mostly, and user need pass through long-time training and can accurately operate.
Utility model content
The purpose of this utility model is for the technological deficiency existing in prior art, and a kind of measuring system of LED radiating module entire thermal resistance easy and simple to handle is provided.
For realizing the technical scheme that the purpose of this utility model adopts be:
A kind of LED radiating module entire thermal resistance measuring system, comprises LED radiating module, environmental simulation test case, moisture recorder and power control system, and described environmental simulation test case comprises base and casing, and between described base and casing, sealing is installed; Described environmental simulation test case inside is provided with import blast plenum chamber, test air channel and outlet blast plenum chamber, and described test air channel is communicated with described import blast plenum chamber and outlet blast plenum chamber respectively; With on the corresponding described casing of described import blast plenum chamber, be provided with air in, described air in place is provided with air stream drive unit and air heating apparatus; With on the corresponding described casing of described outlet blast plenum chamber, be provided with air out; Inner air mobile upstream end in described test air channel is provided with air themperature test point, the mobile middle and lower reaches of described test air channel inner air place is provided with described LED radiating module, the thermometric reference point of described LED radiating module and air themperature test point place are separately installed with temperature probe, and the temperature signal output terminal of each described temperature probe is connected with described moisture recorder Yi road thermocouple wire respectively; Described test is provided with wind speed thief hatch on air channel, and described wind speed thief hatch is connected with described wind speed measuring device by hard pipeline; Described power control system comprises LED driving power, air stream driving power and heat driven power supply, and described LED driving power, air stream driving power and heat driven power supply are the independent current source with adjusting and display driver electric current and driving voltage function.
The data output end of described moisture recorder is connected with the computing machine of inputting and calculating and show for data by data line.
Described LED radiating module is installed on the upper surface of the insulation material of filling in sample bearing cavity, and only has heating radiator in described LED radiating module to expose in described test air channel.
On the sidewall of described sample bearing cavity, be respectively arranged with the through wires hole passing for thermocouple wire and the LED drive wire of described moisture recorder.
Described LED radiating module comprises one or plurality of LEDs lamp pearl, circuit board and heating radiator, every described LED lamp pearl is through reflow soldering in the series circuit on described circuit board, described circuit board is fixedly installed in described spreader surface, between described circuit board and described heating radiator, be provided with heat conducting medium filling layer, the base next-door neighbour point place of every described LED lamp pearl is thermometric reference point.
Described casing forms by pmma material is bonding.
Described air stream drive unit is fan, and described air heating apparatus is spirally-wound resistance wire, and described wind speed measuring device is draft gauge.
Compared with prior art, the beneficial effects of the utility model are:
1, measuring system of the present utility model is easy and simple to handle, simple in structure, and cost is low.
2, measuring system of the present utility model possesses the stable regulation function of the key influence factors such as LED drive current, air velocity and environment temperature, record average junction temperature and the radiating module entire thermal resistance numerical value over time of all LED chips under corresponding operating mode, be convenient to investigate the affect trend of various key influence factors on radiating module entire thermal resistance.
3, measuring system obtained experimental data of the present utility model is effectively reliable, and the objective law representing contributes to study and the understanding to heat dissipation design and analytical approach.
Accompanying drawing explanation
Fig. 1 be shown in the schematic diagram of the utility model LED radiating module entire thermal resistance measuring system;
Fig. 2 be shown in the structural representation of LED radiating module in Fig. 1;
Figure 3 shows that the structural representation of environmental simulation test case in Fig. 1;
Figure 4 shows that LED calibration sample under 9 kinds of different driving electric currents input electric power with the scatter plot of data of variations injunction temperature;
Figure 5 shows that LED calibration sample under 9 kinds of different driving electric currents luminous power with the scatter plot of data of variations injunction temperature;
Figure 6 shows that LED calibration sample under 9 kinds of different driving electric currents heating power with the scatter plot of data of variations injunction temperature;
Figure 7 shows that LED calibration sample under 9 kinds of different driving electric currents junction temperature with the scatter plot of data of thermometric reference point temperature variation.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
The schematic diagram of measuring system of the present utility model as shown in Figure 1-Figure 3, comprise LED radiating module 1, environmental simulation test case 2, moisture recorder 4 and power control system, described environmental simulation test case 2 comprises base 201 and casing 202, and between described base 201 and casing 202, sealing is installed.Can adopt the hermetically-sealed construction of prior art, in the present embodiment, preferably back-off structure realizes sealing, the upper shed size that is described base 201 is slightly larger than the under shed size of casing 202, when the under shed of casing 202 tips upside down on behind the upper shed inside of base 201, can rely on the self gravitation of casing 202 to guarantee the under shed edge of casing 202 and the backplate surface close contact of base 201 and realize sealing; When lifting casing 202, also can facilitate picking and placeing and the operation such as the layout of thermocouple wire 41 and LED drive wire 31 of LED radiating module 1.Described environmental simulation test case 2 inside are provided with import blast plenum chamber 206, test air channel 207 and outlet blast plenum chamber 210, and described test air channel 207 is communicated with described import blast plenum chamber 206 and outlet blast plenum chamber 210 respectively; With on the corresponding described casing 202 of described import blast plenum chamber 206, be provided with air in 205, described air in 205 places are provided with air stream drive unit 203 and air heating apparatus 204; With on the corresponding described casing 202 of described outlet blast plenum chamber 210, be provided with air out 211; 207 inner airs mobile upstream end in described test air channel is provided with air themperature test point 208, the mobile middle and lower reaches of described test air channel 207 inner airs place is provided with described LED radiating module 1, the thermometric reference point 14 of described LED radiating module 1 and air themperature test point 208 places are separately installed with temperature probe, and the temperature signal output terminal of each described temperature probe is connected with described moisture recorder 4 Yi road thermocouple wires 41 respectively; Described power control system 3 comprises LED driving power 3-1, air stream driving power 3-2 and heat driven power supply 3-3, and described LED driving power 3-1, air stream driving power 3-2 and heat driven power supply 3-3 are the independent current source with adjusting and display driver electric current and driving voltage function.LED driving power 3-1 drives wire 31 driving LED by LED, and air stream driving power 3-2 is by driving wire 32 to drive air stream drive unit 203, and heat driven power supply 3-3 drives air heating apparatus 204 by wire 33.In the present embodiment, described casing forms by pmma material is bonding; Described air stream drive unit is fan, and described air heating apparatus is spirally-wound resistance wire.Wherein, the mounting points of sample is positioned at the middle and lower reaches region of the test channel of bottom half, so that in the air stream of sample in development completely.
Can adopt and manually carry out data processing and calculating, also can adopt computing machine to carry out data processing.In the time adopting computing machine to carry out data processing, the data output end of described moisture recorder 4 is connected with the computing machine 5 of inputting and calculating and show for data by data line 42.
In order to keep wind speed certain, in addition, also can probe into the Changing Pattern between wind speed and entire thermal resistance, described test is provided with wind speed thief hatch 209 on air channel, and described wind speed thief hatch 209 is connected with described wind speed measuring device 215 by hard pipeline 216.In the present embodiment, described wind speed measuring device is draft gauge.In the acquisition port of the middle and upper reaches region division draft gauge of test channel, and can through type
by blast W
p(unit: Pa) changes into wind speed u (unit: m/s).
Described LED radiating module 1 is installed on the upper surface of the insulation material 213 of sample bearing cavity 212 interior fillings, and only has heating radiator in described LED radiating module 1 to expose in described test air channel 207.
On the sidewall of described sample bearing cavity 212, be respectively arranged with the through wires hole passing for thermocouple wire 41 and the LED drive wire 31 of described moisture recorder 4.
Described LED radiating module comprises one or plurality of LEDs lamp pearl 11, circuit board 12 and heating radiator 13, every described LED lamp pearl is through reflow soldering in the series circuit on described circuit board, described circuit board is fixedly installed in described spreader surface, between described circuit board and described heating radiator, be provided with heat conducting medium filling layer, the base next-door neighbour point place of every described LED lamp pearl is thermometric reference point 14.
Air enters import blast plenum chamber 206 by the driving of fan through air in 205, is heated by air at air in place by resistance wire 204.Heated air is after import blast plenum chamber, enter test air channel 207, air passes through air themperature test point 208, wind speed thief hatch 209 and LED radiating module 1 successively, enter subsequently outlet blast plenum chamber 210, finally flow out environmental simulation test case 2 from air out 211 by the air after the second current stabilization.The temperature probe of air themperature test point 208 detects that the temperature information of the LED radiating module that the temperature of air and the temperature probe at thermometric reference point 14 places detect delivers to moisture recorder 4 by thermocouple wire, moisture recorder 4 is delivered to related data in computing machine 5 and is calculated, thereby draws entire thermal resistance numerical value.By the setting value of the key influence factors such as independent drive current, air velocity and the environment temperature that changes LED, obtain respectively final LED junction temperature and radiating module entire thermal resistance R under stable state successively
j-Avariation tendency.
The concrete grammar that uses LED radiating module entire thermal resistance of the present utility model to measure is as follows:
(1) measurement of LED lamp pearl voltage temperature coefficient
Extract arbitrarily the 4 LED lamp pearls identical with production batch in LED radiating module to be measured, be placed in respectively on the photochromic thermoelectricity capability comprehensive tester of the SSP8810-S type LED temperature control platform of (being after this called for short: SSP8810-S type tester), obtain respectively temperature control platform in low temperature T with the measuring current of 10mA
lwith high temperature T
htime LED positive test voltage V
land V
h, and then through type (1) calculates the voltage temperature coefficient K of LED device.Concrete data are shown in Table 1.
The voltage temperature coefficient of table 1LED lamp pearl
| Lamp pearl numbering | K 1(mV/℃) | K 2(mV/℃) | K 3(mV/℃) | K 4(mV/℃) |
| 1 | -2.2513 | -2.2534 | -2.2534 | -2.2555 |
| 2 | -2.2940 | -2.2451 | -2.2451 | -2.2451 |
| 3 | -2.3024 | -2.2436 | -2.2457 | -2.2478 |
| 4 | -2.2762 | -2.2439 | -2.2503 | -2.2374 |
As can be seen from Table 1, every LED lamp pearl all can record 4 K values, totally 4 groups of data.But, in measuring, only need to set unique K value in follow-up heat, electricity, optical parameter.For the accuracy that assurance coefficient K sets, finally get its mean value-2.2556mV/ ℃, and No. 1 LED lamp pearl more approaches this mean value, therefore, using 1 signal lamp pearl as LED calibration sample.
(2) measurement of LED calibration sample key physical parameter and relational expression matching
By LED calibration sample, dress up a small heat-dissipating module with circuit board and the radiator panel of the identical material of LED radiating module to be measured, assemble method is identical with LED radiating module to be measured.And be placed in the integrating sphere of SSP8810-S type tester.After the K value of set-2.2556mV/ ℃, in 200mA to 600mA scope, set respectively drive current and implement with the interval of 50mA and measure.Be 50min each conduction time of measuring, sampling interval 3s.9 groups of junction temperatures that finally record and electric power, luminous power data are as shown in Figure 4 and Figure 5.In figure, be respectively the data of 200mA, 250mA, 300mA, 350mA, 400mA, 450mA, 500mA, 550mA, 600mA from bottom to top.In figure, T
j1represent LED calibration sample junction temperature, P
erepresent input electric power, P
lrepresent luminous power.
Due to the heating power Q of single LEDs
singlecan not directly record by SSP8810-S type tester, and need to be with the input electric power P in Fig. 4
ewith the luminous power P in Fig. 5
ldifference represented:
Q
single=P
E-P
L (2)。
In this way after deal with data, heating power is with the scatter plot of data of variations injunction temperature as shown in Figure 6 under 9 kinds of different driving electric currents to obtain LED calibration sample.
As seen from Figure 6, the loose point of data under each drive current distributes and presents approximate linear relationship, therefore in Origin software, use " Fit Linear " function, final matching has obtained the approximation relation formula of 9 heating powers and junction temperature, be that heating power is with LED variations injunction temperature coefficient with A, B be heating power with LED variations injunction temperature constant, be designated as Q
single1=A × T
j1+ B, test result is respectively:
Q
single1＝-1.66908·T
J1+1817.8157,(I
F＝600mA) (3)
Q
single1＝-1.58846·T
J1+1643.6857,(I
F＝550mA) (4)
Q
single1＝-1.35896·T
J1+1465.5940,(I
F＝500mA) (5)
Q
single1＝-1.20836·T
J1+1295.5245,(I
F＝450mA) (6)
Q
single1＝-0.96694·T
J1+1126.9069,(I
F＝400mA) (7)
Q
single1＝-0.87238·T
J1+967.64089,(I
F＝350mA) (8)
Q
single1＝-0.73189·T
J1+808.04302,(I
F＝300mA) (9)
Q
single1＝-0.50099·T
J1+650.67716,(I
F＝250mA) (10)
Q
single1＝-0.37042·T
J1+507.24788,(I
F＝200mA) (11)。
(3) measurement and the relational expression matching of LED calibration sample junction temperature and thermometric reference point temperature
First, heating radiator in the small heat-dissipating module of assembling in step (2) is taken off, and the thermocouple temperature probe in moisture recorder is fixed in the thermometric reference point locations identical with LED radiating module to be measured position on LED calibration sample base side, be placed in again on the temperature control platform of SSP8810-S type tester, and select " test of stable state junction temperature " pattern.The drive current being provided by SSP8810-S type tester is set to respectively identical with 9 drive currents corresponding in step (2), and 11 kinds of temperature control platform temperature are set under each electric current respectively, be made as 4min each conduction time of measuring so that final temperature in stable state.Record the junction temperature T of LED calibration sample by SSP8810-S type tester
j1the thermometric reference point temperature T simultaneously recording with moisture recorder
r1between corresponding data as shown in Figure 7.
As seen from Figure 7, loose point under each drive current distributes and presents equally approximate linear relationship, therefore again adopt " Fit Linear " function to simulate the approximation relation formula of 9 junction temperatures and thermometric reference point temperature, C is that LED junction temperature is with thermometric reference point temperature varying coefficient, D be LED junction temperature with thermometric reference point temperature variation constant, be designated as T
j1=C × T
r1+ D, test result is respectively:
T
J1＝0.96107·T
R1+20.78313,(I
F＝600mA) (12)
T
J1＝0.95426·T
R1+19.48485,(I
F＝550mA) (13)
T
J1＝1.0796·T
R1+12.5101,(I
F＝500mA) (14)
T
J1＝1.00548·T
R1+14.49903,(I
F＝450mA) (15)
T
J1＝1.11135·T
R1+8.97139,(I
F＝400mA) (16)
T
J1＝1.12323·T
R1+7.49332,(I
F＝350mA) (17)
T
J1＝1.19246·T
R1+4.28608,(I
F＝300mA) (18)
T
J1＝1.42896·T
R1-4.64882,(I
F＝250mA) (19)
T
J1＝1.43115·T
R1-6.36309,(I
F＝200mA) (20)。
(4) N=6 the LED testing sample identical with LED calibration sample production batch made to radiating module, to drive respectively the LED testing sample in LED radiating module to be measured with 9 drive currents corresponding in step (2), be that 1.85m/s and environment temperature are under the condition of 25 ± 1.0 ℃ keeping wind speed, measure the temperature T of every LEDs testing sample and LED calibration sample same position thermometric reference point under each drive current
r2, the concrete data while obtaining final stable state are shown in Table 2.
The temperature of table 2LED radiating module thermometric reference point
According to formula (12)-(20), by the LED calibration sample thermometric reference point temperature T in formula (12)-(20)
r1by LED testing sample thermometric reference point temperature T
r2replace, calculate in different driving electric current I
fjunction temperature T under lower every LEDs testing sample different driving electric current
j2, and calculate at each drive current I
fthe average junction temperature of lower N LEDs testing sample
the concrete data that obtain are shown in Table 3.
The junction temperature of chip of table 3LED radiating module
According to formula (3)-(11), by the LED calibration sample junction temperature T in formula (3)-(11)
j1by the average junction temperature of N LEDs testing sample
replace, calculate the average heating power of the N LEDs testing sample under each drive current
the concrete data that obtain are shown in Table 4.
The average heating power of table 4LED radiating module
(5) final, calculate LED testing sample radiating module entire thermal resistance R according to formula (21)
j-A:
The concrete data that obtain are shown in Table 5.
The entire thermal resistance of table 5LED radiating module
While utilizing measuring system of the present utility model to measure, first in SSP8810-S type tester, record the various key physical variablees of single LEDs with the delta data of junction temperature, and by numerical fitting processing, obtain different driving electric current place an order LEDs heating power, junction temperature of chip respectively with the calculating formula that is related to of thermometric reference point temperature; On this basis, design and build the system that a set of LED of realization radiating module entire thermal resistance is measured, it is measured hardware and includes several the experimental facilitiess that are easy to get, and the processing of data is realized by computing machine with storage; Finally, recorded LED junction temperature and the radiating module entire thermal resistance variation tendency with key influence factors such as LED drive current, air velocity and environment temperatures by this system.Native system is simple to operate, with low cost, and obtained experimental data is effectively reliable, and the objective law representing contributes to study and the understanding to heat dissipation design and analytical approach.
The above is only preferred implementation of the present utility model; it should be noted that; for those skilled in the art; do not departing under the prerequisite of the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.
Claims (7)
1. a LED radiating module entire thermal resistance measuring system, it is characterized in that, comprise LED radiating module (1), environmental simulation test case (2), moisture recorder (4) and power control system, described environmental simulation test case (2) comprises base (201) and casing (202), and between described base (201) and casing (202), sealing is installed; Described environmental simulation test case (2) inside is provided with import blast plenum chamber (206), test air channel (207) and outlet blast plenum chamber (210), and described test air channel (207) is communicated with described import blast plenum chamber (206) and outlet blast plenum chamber (210) respectively; With on the corresponding described casing of described import blast plenum chamber (206) (202), be provided with air in (205), described air in (205) locates to be provided with air stream drive unit (203) and air heating apparatus (204); With on the corresponding described casing of described outlet blast plenum chamber (210) (202), be provided with air out (211); Inner air mobile upstream end in described test air channel (207) is provided with air themperature test point (208), the mobile middle and lower reaches of described test air channel (207) inner air place is provided with described LED radiating module (1), thermometric reference point (14) and the air themperature test point (208) of described LED radiating module (1) locate to be separately installed with temperature probe, and the temperature signal output terminal of each described temperature probe is connected with described moisture recorder (4) Yi road thermocouple wire (41) respectively; On described test air channel (207), be provided with wind speed thief hatch (209), described wind speed thief hatch (209) is connected with described wind speed measuring device (215) by hard pipeline (216); Described power control system comprises LED driving power (3-1), air stream driving power (3-2) and heat driven power supply (3-3), and described LED driving power (3-1), air stream driving power (3-2) and heat driven power supply (3-3) are the independent current source with adjusting and display driver electric current and driving voltage function.
2. LED radiating module entire thermal resistance measuring system according to claim 1, is characterized in that, the data output end of described moisture recorder is connected with the computing machine of inputting and calculating and show for data by data line.
3. LED radiating module entire thermal resistance measuring system according to claim 1, it is characterized in that, described LED radiating module (1) is installed on the upper surface of the insulation material (213) of filling in sample bearing cavity (212), and only has heating radiator in described LED radiating module (1) to expose in described test air channel (207).
4. LED radiating module entire thermal resistance measuring system according to claim 3, it is characterized in that, on the sidewall of described sample bearing cavity (212), be respectively arranged with the through wires hole passing for thermocouple wire (41) and the LED drive wire (31) of described moisture recorder (4).
5. LED radiating module entire thermal resistance measuring system according to claim 1, it is characterized in that, described LED radiating module comprises one or plurality of LEDs lamp pearl (11), circuit board (12) and heating radiator (13), every described LED lamp pearl is through reflow soldering in the series circuit on described circuit board, described circuit board is fixedly installed in described spreader surface, between described circuit board and described heating radiator, be provided with heat conducting medium filling layer, the base next-door neighbour point place of every described LED lamp pearl is thermometric reference point (14).
6. according to the LED radiating module entire thermal resistance measuring system described in any one in claim 1-5, it is characterized in that, described casing forms by pmma material is bonding.
7. according to the LED radiating module entire thermal resistance measuring system described in any one in claim 1-5, it is characterized in that, described air stream drive unit is fan, and described air heating apparatus is spirally-wound resistance wire, and described wind speed measuring device is draft gauge.
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|---|---|---|---|
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105182253A (en) * | 2015-10-12 | 2015-12-23 | 无锡优为照明科技有限公司 | Lamp temperature rise testing device capable of adjusting ambient environment temperature |
| CN106338375A (en) * | 2015-07-08 | 2017-01-18 | 上海宽带技术及应用工程研究中心 | Equipment cabinet board card heat testing method and device |
| CN117434110A (en) * | 2023-12-19 | 2024-01-23 | 北京蓝威技术有限公司 | Testing method for thermal resistance of serial liquid cooling radiator under forced convection |
-
2013
- 2013-12-09 CN CN201320808138.5U patent/CN203658555U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106338375A (en) * | 2015-07-08 | 2017-01-18 | 上海宽带技术及应用工程研究中心 | Equipment cabinet board card heat testing method and device |
| CN105182253A (en) * | 2015-10-12 | 2015-12-23 | 无锡优为照明科技有限公司 | Lamp temperature rise testing device capable of adjusting ambient environment temperature |
| CN117434110A (en) * | 2023-12-19 | 2024-01-23 | 北京蓝威技术有限公司 | Testing method for thermal resistance of serial liquid cooling radiator under forced convection |
| CN117434110B (en) * | 2023-12-19 | 2024-03-08 | 北京蓝威技术有限公司 | Testing method for thermal resistance of serial liquid cooling radiator under forced convection |
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