CN105699048A - Flow resistance testing device and method for water-cooled heat sink - Google Patents
Flow resistance testing device and method for water-cooled heat sink Download PDFInfo
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- CN105699048A CN105699048A CN201610223094.8A CN201610223094A CN105699048A CN 105699048 A CN105699048 A CN 105699048A CN 201610223094 A CN201610223094 A CN 201610223094A CN 105699048 A CN105699048 A CN 105699048A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M10/00—Hydrodynamic testing; Arrangements in or on ship-testing tanks or water tunnels
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
Abstract
The invention discloses a flow resistance testing device and method for a water-cooled heat sink. The testing device includes a power system, a flow control system, a temperature control system and a testing platform. The power system includes a high level water tank, a cycle water tank, pipelined and a water feed pump. The pipelines include a water feed pipeline, an overflow pipeline and a testing pipeline. The liquid level in the high level water tank is regulated through the water feed pipeline and the overflow pipeline, so that the stability of water voltage is ensured. A regulating valve, a pressure meter and a flow meter are arranged in the pipelines for flow control. The water temperature is regulated through arranging the temperature control system and the temperature stability of circulating water medium is ensured. Therefore, high precision testing requirements on consistency of products of the same batch are met. By adopting the device and method provided by the invention, the noise is low; the cost is low; the testing precision is high; the same batch product testing stability is high; and testing requirements on consistency of batch products can be met.
Description
Technical field
The present invention relates to technical field of heat dissipation, be specifically related to a kind of water-filled radiator flow resistance test device and method。
Background technology
Flow resistance refers to that fluid is under steady flow condition, cooling medium flows through the pressure loss of radiator, its value is equal to radiator the cooling medium static pressure of specified point and radiator cooling medium differential static pressure of specified point in outlet flow in inlet channel, and unit is handkerchief (Pa) or is kPa (kPa)。Due to the complexity of flow field motion, Theoretical Calculation being difficult to be carried out deriving with mathematical formulae calculates, and the flow resistance problem in engineering is usually taken the way of experiment test and solves。
Traditional radiator flow resistance test equipment is generally adopted the mode regulating valve regulation, controls cooling medium consumption by control valve size, again through the gauge measurement value of radiator intake-outlet, calculates radiator flow resistance size。Such experimental provision often there is problems in that 1) cooling medium inlet temperature is non-adjustable。The viscosity coefficient of usual fluid is understood variation with temperature and is changed, kinematic viscosity directly influences product drag size, at different temperatures, the flow resistance of test identical product can be variant, thus the uniformity test result of batch products is produced unnecessary error；2) in water tank, liquid level is unstable。Along with the reduction of liquid level, the flow velocity of liquid reduces, and directly influences the size into water fluid head, and controller signals collection also can be produced interference by the change of pressure, influences whether the coherence measurement of batch products equally；3) data point can be surveyed few。Owing to flow velocity adjusting range is narrow, causing velocity variations interval little, measurable flow resistance scope is little。4) external environment condition is big on test result impact, and certainty of measurement is low。
In prior art, application number be 201110101474.1 Chinese invention disclose a kind of novel heat radiator thermal resistance flow resistance test equipment, including equipment box and base, including thyristor radiator on equipment box and press-fit part, water circulation system, test and collecting device, equipment box includes power-supply device and cistern;Thyristor radiator press-fits part and is arranged on equipment box, thyristor radiator press-fits one end of part and is connected with equipment box, the other end is connected with test and collecting device, testing and be connected by water circulation system with between collecting device with described cistern, thyristor radiator press-fits and is provided with water circulation system between part and test and collecting device。Application number be 201320352620.2 Chinese utility model disclose a kind of Valveless piezoelectric pump flow resistance test device, including water tank, water tank is connected with Valveless piezoelectric pump to be tested by catheter, catheter is provided with check valve, described water tank is divided into water storage box and operating water tank by a dividing plate, and described dividing plate is provided with blasthole；Described operating water tank sidewall is provided with flow-out hole, and described flow-out hole is connected with catheter by check valve；Described operating water tank is provided with and controls the upper water assembly that blasthole opens and closes。Above prior art, all can not adopt the accurate stably batch testing water-filled radiator flow resistance of water-cycling mode。
Summary of the invention
The technical problem to be solved is to provide a kind of water-filled radiator flow resistance test device and method, and it can adopt the accurate stably batch testing water-filled radiator flow resistance of water-cycling mode。
The technical scheme is that a kind of water-filled radiator flow resistance test device, including dynamical system, described dynamical system includes elevated tank, circulating water pool, pipeline and feed pump；Described pipeline include supply line, spilling water pipeline, test pipeline, described supply line, spilling water pipeline, test pipeline two ends connect elevated tank and circulating water pool respectively；Circulating water pool, supply line, elevated tank, test pipeline connect one water-flow circuit of formation, and feed pump is connected between circulating water pool and supply line；Water-filled radiator is connected on test pipeline。
Described water-filled radiator flow resistance test device also includes flow control system, and described flow control system includes regulating valve and pipeline component；Regulate valve and include the first adjustment valve, the second adjustment valve, the 3rd adjustment valve；Pipeline component includes the first digital display manometer, the second digital display manometer, the 3rd digital display manometer, first-class gauge, second gauge and the liquidometer being arranged on elevated tank；Described 3rd digital display manometer, the 3rd regulate valve, first-class gauge, first regulate valve, the first digital display manometer and be sequentially arranged at elevated tank to the test pipeline between water-filled radiator；Described second digital display manometer is arranged on water-filled radiator to the test pipeline between circulating water pool；Described second gauge, second regulate valve and be arranged on elevated tank to the supply line between feed pump。
Described water-filled radiator flow resistance test device also includes temperature control system, and temperature control system includes water temperature and controls information system, heater and heat abstractor, and described heater and heat abstractor are installed on circulating water pool。
Described water-filled radiator flow resistance test device also includes the test platform for placing water-filled radiator。
Elevated tank is arranged on above test platform by fixed supporting seat, test platform 0.7～0.8m above ground level, and the difference in height of elevated tank bottom surface and test platform upper surface is 13.5 meters。
Pipeline periphery is packaged with insulation material；The precision of first-class gauge, the first digital display manometer and the second digital display manometer all controls more than 0.5 grade, and flow adjustment range is at 3～20L/min；Test the 3rd digital display manometer on pipeline, the 3rd adjustment valve, first-class gauge, the first adjustment valve, the first digital display manometer and the second digital display manometer to be arranged on same axial line；Water-filled radiator is connected on test pipeline by nipple, and the junction of test pipeline and water-filled radiator all adopts hose construction to be tightly connected, and the junction of test pipeline and water-filled radiator is arranged on test platform；Pipeline adopts stainless steel material, and test pipeline is arranged below fixing support rack；Elevated tank sets gap, is used for connecting spilling water pipeline；Gap diameter is more than supply line caliber。
Described water-filled radiator flow resistance test device also includes electrical power control cabinet, earth leakage protective device and is arranged on the operation control unit that test platform is other；Described operation control unit includes display screen, and display screen is touch screen；Described feed pump, the first adjustment valve, the second adjustment valve, the 3rd adjustment valve, the first digital display manometer, the second digital display manometer, the 3rd digital display manometer, first-class gauge, second gauge, liquidometer, water temperature control information system, heater, heat abstractor, electrical power control cabinet are all connected with operation control unit。
A kind of water-filled radiator flow resistance method of testing, adopts water circulation system to test water-filled radiator flow resistance, arranges a water-flow circuit being in turn connected to form by circulating water pool, supply line, elevated tank, test pipeline；Elevated tank is arranged on predetermined altitude to provide predetermined hydraulic pressure；Separately set spilling water pipeline and connect circulating water pool and elevated tank, regulate liquid level in elevated tank by supply line and spilling water pipeline, it is ensured that the stability of hydraulic pressure；Flow is controlled by arranging adjustment valve, Pressure gauge and effusion meter in pipeline；By arranging temperature control system, water temperature is adjusted, it is ensured that circulating water temperature is stable；Thus meeting the concordance high precision measurement requirement with batch products。
It is manipulated by unit, it is achieved automatically control and control is manually set。
Adopt above-mentioned water-filled radiator flow resistance test device to test, comprise the steps:
The step of design temperature and uninterrupted；
The step of heating or heat radiation；
Connect the step of water-filled radiator；
Start feed pump and produce the step of water circulation；
Elevated tank produces the step of pressure head；
Control the step of flow and temperature；
Record or preservation are measured numerical value and complete the step of test。
Determine the liquid level in the temperature of recirculated water and uninterrupted and elevated tank before test, and set temperature and the flow value of recirculated water at operation control unit；Start-up temperature controls system and is heated or dispels the heat, by the lower water temperature in circulating water pool to predetermined value, water-filled radiator it is put on test platform and is connected in test pipeline, starting feed pump, the liquid level in elevated tank is made to reach predetermined altitude, it is provided that predetermined hydraulic pressure；Simultaneously by the adjustment of supply line and spilling water pipeline, liquid level in elevated tank is made to be maintained at predetermined altitude；Regulated and controled the flow of recirculated water by pipeline component, and by the temperature of recirculated water and flow-control in predetermined range, record or keep measurement numerical value and complete the test to water-filled radiator flow resistance。
Owing to client is very tight to same water-filled radiator product particularly batch products flow resistance test request, required precision is high, existing test equipment and method can not meet the uniformity test requirement of bulk article, and in view of conventional test device and method defect, the present invention has carried out corresponding improvement。Adopting the present invention, noise is low, and cost is low, and measuring accuracy is high, measures stability with batch products high, can meet the uniformity test requirement of bulk article。Being measured by actual motion, whole water-filled radiator flow resistance test system noise is below 60 decibels, and package unit cost is less than 100,000 yuan。And within the scope of 3～20L/min flow rate test under arbitrary firm discharge, flow system flow control accuracy can control within 5 ‰, radiator flow resistance repetition measurement precision can reach the accurate measurement requirement of the high accuracy lower than 1%。The present invention adopts water loop test system, can be used for detecting power semiconductor device radiator flow resistance, is a kind of low-cost and high-precision flow resistance test device。
The invention have the advantages that 1) cooling medium inlet temperature is adjustable。Thus under different ambient temperatures, when testing the flow resistance of identical product, the error of the uniformity test result to same batch products produced because of temperature impact can be largely avoided；2) in water tank, liquid level is adjustable。Thus the size of water inlet fluid head can be needed to regulate in time according to test, it is to avoid controller signals collection is produced interference, it is ensured that the coherence measurement of batch products；3) data point can be surveyed many。Flow velocity adjusting range increases, and velocity variations is interval big, and measurable flow resistance scope is big。4) substantially reduce the external environment condition impact on test result, further increase certainty of measurement。
Accompanying drawing explanation
Fig. 1 is the structural representation of water-filled radiator flow resistance test device；
In figure: 11, elevated tank, 12, circulating water pool, 13, pipeline, 14, regulate valve, 15, pipeline component, 16, feed pump, 17, fixed supporting seat, 18, fixing support rack；
3, temperature control system, 31, heater, 32, water temperature control information system, 4, water-filled radiator；
131, supply line, 132, spilling water pipeline, 133, test pipeline；
141, first regulating valve, 142, second regulates valve, and the 143, the 3rd regulates valve；
151, the first digital display manometer, the 152, second digital display manometer, the 153, the 3rd digital display manometer, 154, first-class gauge, 155, second gauge, 156, liquidometer。
Detailed description of the invention
As it is shown in figure 1, a kind of water-filled radiator flow resistance test device, including dynamical system, flow control system, temperature control system 3, test platform, electrical power control cabinet and earth leakage protective device。
Dynamical system mainly includes elevated tank 11, circulating water pool 12, pipeline 13, feed pump 16。Elevated tank 11, circulating water pool 12, pipeline 13, feed pump 16, adjustment valve 14, pipeline component 15, nipple are connected with radiator (water-filled radiator 4) and are combined into a water circulation system, and recirculated water filters Posterior circle by circulating water pool Zhong bis-road overflow mechanism and comes into operation；Bottom arranges and puts water regulating valve and be easy to periodic cleaning cycles pond (can also adopt cyclic water tank)。Supply line 131 is installed suspended body flowmeter (second gauge 155), for monitoring watering amount slightly larger than test flow。Gap caliber is much larger than supply line caliber, it is ensured that elevated tank liquid level is constant, reaches system pressure stable。Pipeline 13 includes supply line 131, spilling water pipeline 132, test pipeline 133。Elevated tank is installed on fixed supporting seat 17, and test pipeline is installed on fixing support rack 18。
Flow control system includes valve (including regulating valve 14), pipeline component 15。Regulate valve 14 and include first adjustment valve the 141, second adjustment valve the 142, the 3rd adjustment valve 143。Pipeline component 15 includes first digital display manometer the 151, second digital display manometer the 152, the 3rd digital display manometer 153, first-class gauge 154, second gauge 155, liquidometer 156。Supply line 131 and spilling water pipeline 132 regulate elevated tank water level to produce stable pressure head, water level must control at suitable height, and deviation is within the specific limits, on test pipeline 133 regulate valve can the discharge passed through of independent regulation pipeline keep stablizing of flow, digital display manometer display flow and radiator flow resistance。
Temperature control system 3: install heater 31 and heat abstractor, controls information system 32 by water temperature and can effectively control circulatory mediator temperature, Real-time Feedback temperature data information。Water temperature controls information system and connects circulating water pool, and heater 31 and heat abstractor also connect water temperature respectively and control information system。
Test platform: podium level 0.7～0.8m, schematic diagram test zone is integrated, is beneficial to measurement system information monitoring, improves testing efficiency。During test, test specimen water-filled radiator is positioned on test platform。
Water-filled radiator flow resistance test device includes radiator flow resistance detection water circulation system (water circulation system for flow resistance detection), and radiator flow resistance detection water circulation system is mainly made up of dynamical system, flow control system, temperature control system, test platform, adjustment valve and pipeline component。System test circulatory mediator is tap water, by stability contorting discharge, for detecting the specific discharge crushing by producing after water-filled radiator inner flow passage。
Specific embodiments is as follows: produce pressure head by arranging elevated tank 11, and elevated tank is located at factory top, and distance horizontal plane maximum height 13.5 meters, to ensure the hydraulic pressure of abundance。Simultaneously by the adjustment of supply line 131 and spilling water pipeline 132 so that in elevated tank, liquid level remains consistent, it is ensured that the stability of pressure head, when testing same batch products, hydraulic pressure and flow can control in same level。Supply line 131 is intake by circulating water pool 12, and circulatory mediator tap water considers temperature impact, is additionally arranged at the bottom heater and heat abstractor at circulating water pool 12, it is possible to be adjusted entering coolant-temperature gage, it is achieved water temperature is adjustably controlled。All pipelines carry out isothermal holding by insulation material packaging simultaneously, it is ensured that water-cycling-media temperature stabilization。
The test device design of water-filled radiator flow resistance has three pipeline structures, is divided into supply line 131, spilling water pipeline 132, test pipeline 133；Wherein test pipeline 133 need to individually control and regulate the discharge stablizing in pipeline, being provided with adjustment valve and effusion meter on test pipeline, wherein mass flowmenter (first-class gauge 154) and differential manometer (first digital display manometer the 151, second digital display manometer 152) precision controlling are more than 0.5 grade。The mode of liquid level is regulated by elevated tank 11, can accurately control required pressure head and uninterrupted in test pipeline 133, such structure layout design method, water pressure and flow in pipeline can be regulated on the one hand, the requirement to flow-control equipment can be reduced on the other hand, reduce equipment purchase cost。Simultaneously for ensureing the accurate of test product flow, test pipeline 133 discharge is controlled and digital feedback information by effusion meter (including mass flowmenter 154), to ensure high-precision flow measurement requirement。Regulating the stability that valve is finely tuned and ensured test piping flow, flow adjustment range is tested for radiator product flow resistance at 3～20L/min。Consider system stability, circulating line adopts 316 rustless steels, consider system stability, pipeline selects different reducings, and each test instrument is arranged on same axial line on test pipeline 133, to reduce the error because self structure produces, test pipeline 133 inlet/outlet adopts hose construction and radiator tested product to be attached sealing simultaneously, inlet/outlet pipe pipeline laying, before radiator flow resistance test platform, is connected by nipple during the detection of radiator flow resistance and is easy to clamping and dismounting。
Being measured by actual motion, whole water loop test system noise is below 60 decibels, and whole system cost is less than 100,000 yuan。And within the scope of 3～20L/min flow rate test under arbitrary firm discharge, flow system flow control accuracy can control within 5 ‰, radiator flow resistance repetition measurement precision can reach the accurate measurement requirement of the high accuracy lower than 1%。
The present invention is directed to the situation that in reality, measuring accuracy requirement is high, it is necessary to adopt high accuracy mass flowmenter。Above test platform or side arranges operation control unit, and operation control unit includes display screen (for touch screen), it is possible to carries out correlation values by touch screen and sets and other operations。
Adopt above-mentioned water-filled radiator flow resistance test device that water-filled radiator flow resistance is tested。Determine the liquid level in the temperature of recirculated water and uninterrupted and elevated tank before test, and set temperature and the flow value of recirculated water at operation control unit；Start-up temperature controls system by the lower water temperature in circulating water pool to predetermined value, is put on test platform by water-filled radiator and is connected in test pipeline, starting feed pump, make the liquid level in elevated tank reach predetermined altitude, it is provided that predetermined hydraulic pressure；Simultaneously by the adjustment of supply line and spilling water pipeline so that in elevated tank, liquid level is maintained at predetermined altitude；Regulated and controled the flow of recirculated water by pipeline component, by the temperature of recirculated water and flow-control in predetermined range, record or keep measurement numerical value and complete the test to water-filled radiator flow resistance。
Testing procedure can also be first heat, then connects water-filled radiator product, water flowing, design temperature flow, and after producing pressure head, regulating flow temperature also makes it remain stable for when same batch products is tested unanimously。
In prior art, many products (water-filled radiator) test adopts variable frequency pump to control flow, there is variable frequency pump flowed fluctuation relatively big, the problem that measurement data is inaccurate。The present invention adopts elevated tank, it is possible to according to precision, adjusts the height of water tank, the quality of water in tank height decision systems, the high accuracy mass flowmenter that effusion meter adopts, it is ensured that the precision of measurement。The present invention is compared with variable frequency water pump system, and cost is low。
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations。All within the spirit and principles in the present invention, any amendment of making, equivalent replacement, improvement etc., be all contained within protection scope of the present invention。
Claims (10)
1. a water-filled radiator flow resistance test device, including dynamical system, described dynamical system includes pipeline and feed pump；It is characterized in that, described dynamical system also includes elevated tank and circulating water pool；Described pipeline include supply line, spilling water pipeline, test pipeline, described supply line, spilling water pipeline, test pipeline two ends connect elevated tank and circulating water pool respectively；Circulating water pool, supply line, elevated tank, test pipeline connect one water-flow circuit of formation, and feed pump is connected between circulating water pool and supply line；Water-filled radiator is connected on test pipeline。
2. water-filled radiator flow resistance according to claim 1 test device, is characterized in that, also include flow control system, and described flow control system includes regulating valve and pipeline component；Regulate valve and include the first adjustment valve, the second adjustment valve, the 3rd adjustment valve；Pipeline component includes the first digital display manometer, the second digital display manometer, the 3rd digital display manometer, first-class gauge, second gauge and the liquidometer being arranged on elevated tank；Described 3rd digital display manometer, the 3rd regulate valve, first-class gauge, first regulate valve, the first digital display manometer and be sequentially arranged at elevated tank to the test pipeline between water-filled radiator；Described second digital display manometer is arranged on water-filled radiator to the test pipeline between circulating water pool；Described second gauge, second regulate valve and be arranged on elevated tank to the supply line between feed pump。
3. water-filled radiator flow resistance according to claim 1 test device, it is characterized in that, also including temperature control system, temperature control system includes water temperature and controls information system, heater and heat abstractor, and described heater and heat abstractor are installed on circulating water pool。
4. water-filled radiator flow resistance according to claim 2 test device, is characterized in that, also include the test platform for placing water-filled radiator。
5. water-filled radiator flow resistance according to claim 4 test device, it is characterized in that, elevated tank is arranged on above test platform by fixed supporting seat, test platform 0.7～0.8m above ground level, and the difference in height of elevated tank bottom surface and test platform upper surface is 13.5 meters。
6. water-filled radiator flow resistance according to claim 4 test device, is characterized in that, pipeline periphery is packaged with insulation material；The precision of first-class gauge, the first digital display manometer and the second digital display manometer all controls more than 0.5 grade, and flow adjustment range is at 3～20L/min；Test the 3rd digital display manometer on pipeline, the 3rd adjustment valve, first-class gauge, the first adjustment valve, the first digital display manometer and the second digital display manometer to be arranged on same axial line；Water-filled radiator is connected to by nipple to be tested on pipeline, and the junction of test pipeline and water-filled radiator adopts hose construction to be tightly connected, and the junction of test pipeline and water-filled radiator is arranged on test platform；Pipeline adopts stainless steel material, and test pipeline is arranged below fixing support rack；Elevated tank sets gap, is used for connecting spilling water pipeline；Gap diameter is more than supply line caliber。
7. water-filled radiator flow resistance according to claim 4 test device, is characterized in that, also includes electrical power control cabinet, earth leakage protective device and is arranged on the operation control unit that test platform is other；Described operation control unit includes display screen, and display screen is touch screen；Described feed pump, the first adjustment valve, the second adjustment valve, the 3rd adjustment valve, the first digital display manometer, the second digital display manometer, the 3rd digital display manometer, first-class gauge, second gauge, liquidometer, water temperature control information system, heater, heat abstractor, electrical power control cabinet are all connected with operation control unit。
8. a water-filled radiator flow resistance method of testing, adopts water circulation system to test water-filled radiator flow resistance, it is characterized in that, arrange a water-flow circuit being in turn connected to form by circulating water pool, supply line, elevated tank, test pipeline；Elevated tank is arranged on predetermined altitude to provide predetermined hydraulic pressure；Separately set spilling water pipeline and connect circulating water pool and elevated tank, regulate liquid level in elevated tank by supply line and spilling water pipeline, it is ensured that the stability of hydraulic pressure；Flow is controlled by arranging adjustment valve, Pressure gauge and effusion meter in pipeline；By arranging temperature control system, water temperature is adjusted, it is ensured that circulating water temperature is stable；Thus meeting the concordance high precision measurement requirement with batch products。
9. water-filled radiator flow resistance method of testing according to claim 8, is characterized in that, be manipulated by unit, it is achieved automatically controls and manually arranges control。
10. water-filled radiator flow resistance method of testing according to claim 8, is characterized in that, adopts the test device of the water-filled radiator flow resistance according to any one of claim 1 to 7 to test, comprises the steps:
The step of design temperature and uninterrupted；
The step of heating or heat radiation；
Connect the step of water-filled radiator；
Start feed pump and produce the step of water circulation；
Elevated tank produces the step of pressure head；
Control the step of flow and temperature；
Record or preservation are measured numerical value and complete the step of test；
Determine the liquid level in the temperature of recirculated water and uninterrupted and elevated tank before test, and set temperature and the flow value of recirculated water at operation control unit；Start-up temperature controls system and is heated or dispels the heat, by the lower water temperature in circulating water pool to predetermined value, water-filled radiator it is put on test platform and is connected in test pipeline, starting feed pump, the liquid level in elevated tank is made to reach predetermined altitude, it is provided that predetermined hydraulic pressure；Simultaneously by the adjustment of supply line and spilling water pipeline, liquid level in elevated tank is made to be maintained at predetermined altitude；Regulated and controled the flow of recirculated water by pipeline component, and temperature and the flow of recirculated water are all controlled in predetermined range, record or keep measurement numerical value and complete the test to water-filled radiator flow resistance。
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| CN109031084A (en) * | 2018-08-23 | 2018-12-18 | 东莞市捷新检测设备有限公司 | A kind of high power water cooling burning measurement equipment |
| CN109490784A (en) * | 2018-12-27 | 2019-03-19 | 南京中港电力股份有限公司 | A kind of vehicle power supply water cooling test platform |
| CN110333093A (en) * | 2019-07-19 | 2019-10-15 | 东莞市泰丰空调制冷设备有限公司 | A kind of water cooler test platform |
| CN111766041A (en) * | 2020-07-09 | 2020-10-13 | 三门核电有限公司 | Flow resistance testing method for outlet pipeline of box body |
| CN111766041B (en) * | 2020-07-09 | 2022-06-10 | 三门核电有限公司 | Flow resistance testing method for outlet pipeline of box body |
| CN113310660A (en) * | 2021-05-31 | 2021-08-27 | 西南电子技术研究所（中国电子科技集团公司第十研究所） | Automatic flow resistance control system for minimum flow |
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|---|---|
| CN105699048B (en) | 2018-11-06 |
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