CN1945347A - Air passage and its control method - Google Patents
Air passage and its control method Download PDFInfo
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- CN1945347A CN1945347A CN 200610062404 CN200610062404A CN1945347A CN 1945347 A CN1945347 A CN 1945347A CN 200610062404 CN200610062404 CN 200610062404 CN 200610062404 A CN200610062404 A CN 200610062404A CN 1945347 A CN1945347 A CN 1945347A
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Abstract
The present invention relates to air passage and its control method, and is especially heating air passage for testing air cooled apparatus and its control method. The air passage includes one pressurizing section, one test section, and one heating section set between the pressurizing section and the test section, and has heater set in the heating section for heating the airflow the pressurizing section outputs. The present invention has the advantages of low resource consumption, open-looped control of wind speed and the closed-loop control operate temperature resulting in low cost, convenient wind speed and temperature regulation, accurate measurement result, etc.
Description
Technical field
The present invention relates to air channel and control method thereof, particularly a kind of heat air channel and control method thereof that is mainly used in the heat run that relies on the device that outside air-supply cools off, fail-test etc.
Background technology
Communication secondary power supply product newly developed is essentially open or the board-like plate dress of tape base power supply at present, plate dress power supply is to dispel the heat by system is air-cooled, in order to test performance index and the derate curve of ejecting plate dress power module under all temps and various wind speed exactly, need control comparatively accurately wind speed and temperature that plate is adorned the power module experimental enviroment.The method that adopts is to do an easy air channel with paper shell or organic glass at present, adds a DC fan at the wind passage mouth place, the air channel is placed in the incubator tests then.
Existing method has several shortcomings: the interim air channel that makes when 1. testing has very big randomness.Air channel size, shape that everyone makes are all inequality, the fan difference of usefulness, and the position that module is installed in the air channel is also different, thereby causes the standard scale difference of test, the consistance of test and repeatable poor.2. the wind speed of diverse location has bigger difference in the air channel, i.e. the lack of homogeneity of wind.Reason is that the wind that the fan rotation produces has certain spiral, handles without any even wind, and the quality of wind is difficult to satisfy the requirement of test.3. the general employing of fan is axial flow blower, the motor of fan is also in the air channel, after temperature raises or changes, rotating speed of motor is affected, wind speed also just and then changes, measure wind speed accurately so at normal temperatures, variation has at high temperature taken place, and at high temperature the equipment price of measuring wind is quite expensive.4. when doing module derate curve, under the high temperature (for example temperature more than 120 ℃), the axial flow motor might damage or the heat protection, and test can't be carried out; 5. axial flow blower can have a strong impact on its serviceable life through the environment work down that be everlasting high temperature or high low temperature change, and does twice test under the situation about having just may damage, and brings inconvenience and increases experimentation cost to test.Need take incubator when 6. testing, expend the test resource, and move inconvenient.
Summary of the invention
The object of the present invention is to provide a kind of air channel and control method thereof, described air channel can provide controllable, stable, uniform hot blast.
The technical solution adopted for the present invention to solve the technical problems is: a kind of air channel, comprise pressurized segment and test section, also comprise the section of heating that is arranged between described pressurized segment and the test section, be provided with well heater in the described section of heating, it is used for the air-flow of pressurized segment output is heated.
As an improvement of the present invention, in the air channel of the present invention, can also comprise flow equalization section between described section of heating and the test section, it is used for the air-flow adjustment of the section of heating output even.The closed loop air channel is adopted in described air channel, forms air return section between described section of heating and the flow equalization section, and the output of described test section links to each other with the input of pressurized segment.Further, described pressurized segment adopts centrifugal fan, and the input end of described impeller of blower links to each other with the output terminal of described test section, and the gas that the output terminal output of described blower fan has certain wind speed flows to the section of heating.
As an improvement of the present invention; also can comprise second flow equalization section between the output terminal of described test section and the input end of pressurized segment; be used for the tail wind of described test section is stablized adjustment; protect the air channel to make its inner not aspirated foreign body simultaneously; air communication is exported after crossing second flow equalization section, reenters described pressurized segment and finishes closed loop.Like this, the input end of the centrifugal fan fan blade in the described pressurized segment links to each other with the output terminal of described second flow equalization section, and the gas that the output terminal output of described blower fan has certain wind speed flows to the section of heating.
As improvement of the present invention, also comprise frequency converter, it links to each other with the motor of described blower fan, is used to control rotating speed of motor; The motor of described blower fan is arranged on outside the air channel.Also comprise controller and thermal detector; Described thermal detector is arranged in the described test section; Described controller links to each other with thermal detector with the well heater of the described section of heating, and is used for controlling according to the output signal of described thermal detector the output of described well heater.
Concrete, described flow equalization section can comprise honeycomb and/or at least one turbulent net.Described second flow equalization section also can comprise honeycomb and/or at least one turbulent net.Can be provided with view window on the described test section.Except that the turning that blower fan is installed, each turning can be provided with flow deflector in the described closed loop air channel.Also can comprise evaporator in the described section of heating, be used for adjusting the homogeneity of the section of heating temperature.Described thermal detector can adopt thermocouple, platinum resistance or copper resistance.
The present invention also provides a kind of control method of air channel, comprising: (a), regulate the frequency of frequency converter, with the rotating speed of control blower fan; (b), after thermal detector detected temperature in the test section and arrives preset value, controller output a control signal to the well heater in the section of heating, and controls the work of described well heater discontinuity.
Beneficial effect of the present invention is: 1. heating arrangement is arranged in the air channel, and the equipment conveniently moving, and reduced expending of resource.2. air channel employing closed loop air channel, and the motor of blower fan places outside the air channel, make wind speed open loop to control, and temperature adopts closed-loop control, thereby make the air channel cheap for manufacturing cost, and motor can be not influenced.3. the wind speed in air channel and temperature can free adjustment, make test accurately, quantize, can reproduce.The present invention can be used for being applied in the safety of the device that the outside air-supply of dependences such as communication secondary power supply module cools off and tests, and the heat run of device, fail-test etc. are as the test of temperature rise and derate.
Description of drawings
Fig. 1 is the structural representation in a kind of air channel of the present invention.
Fig. 2 is a kind of air channel of the present invention perspective view in use.
Fig. 3 is the control method process flow diagram in a kind of air channel of the present invention.
Embodiment
The present invention is further elaborated with specific embodiment with reference to the accompanying drawings below.
As shown in Figure 1 and Figure 2, a kind of air channel of the present invention is the closed loop air channel, air passage portion mainly is divided into pressurized segment 1, the section of heating 2, air return section 3, flow equalization section 4 and test section 5 several sections, and its control section comprises frequency converter (not marking among the figure) and controller (not marking among the figure).
Wherein, pressurized segment 1 adopts centrifugal fan 11, and the input end of described centrifugal fan 11 fan blades links to each other with the output terminal of described test section 5, and the output terminal output of blower fan 11 has the high pressure draught of certain wind speed to the section of heating 2.The motor of described centrifugal fan 11 is arranged on outside the air channel, links to each other with frequency converter.The frequency of frequency converter that therefore can be by being adjusted to blower fan 11 power supplies control the rotating speed of blower fan 11, thereby control blower fan 11 produces the speed of air-flows, promptly controls the wind speed of inside, air channel.
Be provided with well heater in the section of heating 2, the air-flow of pressurized segment 1 output raises through the section of heating 2 back temperature.Well heater links to each other with controller, and it can or carry out discontinuity work at a certain time interval according to the instruction continuous firing of controller, to keep the stable of air channel internal temperature.Evaporator also is set in the section of heating 2, is used to adjust the homogeneity of temperature.Because of well heater is to produce heat by heating rod, the heating rod environment temperature has certain gradient, and evaporator can make the thermograde in the air channel reduce, and makes on the duct cross-section temperature more even, has the function of heat conduction.In other embodiments of the invention, also evaporator can be set.
The effect of air return section 3 is to provide the loop as air-flow.If the turning of air return section 3 is 90 ° right angle or approximate 90 ° angle, then two corner need be provided with flow deflector.Because air-flow is easy to generate separation when turning over the right angle of 90 degree around the corner, forms vortex, causes the inhomogeneous and velocity fluctuation in flow field.Air-flow energy loss around the corner is very big in addition, accounts for the 40-60% of air channel total losses.Therefore for the performance of improving air-flow with reduce the loss, arrange a row flow deflector around the corner, the passage of corner is separated into many narrow and small passages.The shape of flow deflector generally adopts the aerofoil profile of heavy camber.Among the present invention,, flow deflector is set preferably also then if the turning of other parts is 90 ° right angle or approximate 90 ° angle.If air return section 3 be shaped as semicircle or arc or approximate arc, then flow deflector (as shown in Figure 1 and Figure 2) can be set.
The effect of flow equalization section 4 is to output to test section 5 again after the air-flow adjustment evenly with the section of heating 2 output, and it comprises that honeycomb 41 is with turbulent at least net 42 (being damping screen or screens again).Certainly, can only adopt honeycomb 41 or only adopt turbulent net 42 according to actual conditions.Wherein, the effect of honeycomb 41 is broken big air-flow vortexs, and air-flow is combed straight guiding, can reduce the inlet flow condition like this to blower fan 11 Effect on Performance.The effect of turbulent flow net 42 is broken little vortexs, makes it to be not easy decay in flowing, and can make the cross section velocity distribution be tending towards even.In a kind of air channel of the present invention, be provided with two-layer turbulent net 42 in the flow equalization section 4, make the minute adjustment of high temperature gas flow by two-layer turbulent net 42, the uniformity coefficient of its wind speed and temperature can reach the requirement of test.
The effect of test section 5 is places that test is provided for testing apparatus.The experimenter observes for convenience, and test section 5 is provided with view window.For the temperature in the warranty test section 5 meets the requirements, be provided with thermal detector (not marking among the figure) in the test section 5, detect the temperature in the test section 5 in real time, and be sent to controller.Controller is according to the work of the output real-time regulated well heater of thermal detector, so that the temperature in the test section 5 meets the requirements.Wherein, thermal detector can adopt thermocouple, as K type thermocouple relatively more commonly used at present, can also adopt the thermocouple of models such as J, E, R, S, B, T, can also adopt Pt100 platinum resistance or Cu50 copper resistance in addition.
As an improvement of the present invention; among the present invention; also comprise second flow equalization section 6 between test section 5 and the pressurized segment 1; be provided with honeycomb 61 in it with turbulent net 62; be used for the tail wind of test section is stablized adjustment; protect the air channel to make its inner not aspirated foreign body simultaneously, air communication is exported after crossing second flow equalization section, reenters described pressurized segment and finishes closed loop.Wherein, turbulent net 62 is arranged on the front end of honeycomb 61.
The principle of work in above-mentioned air channel and control method be as shown in Figure 3:
S1, by the control of conversion device, 11 rotations of control blower fan produce the high pressure draught of certain speed, output in the air channel;
S2, the well heater in the controller control bringing-up section heats air-flow, and its temperature is raise;
S3, air-flow arrive flow equalization section 4 behind air return section 3,4 pairs of air-flows of flow equalization section are adjusted, and the uniformity coefficient that makes it wind speed and temperature can both reach certain index request;
S4, thermal detector detects the temperature in the test section 5, and testing result is outputed to controller, and controller is adjusted the work of well heater according to its testing result.The method of adjusting can be: after detecting temperature in the test section 5 and reaching test and need, controller begins to allow the work of well heater discontinuity, to keep the stable of air channel internal temperature.
S5, the air-flow of 6 pairs of test sections of second flow equalization section, 5 outputs is adjusted the back once more and is got back to pressurized segment 1 once more by the fan blade of blower fan 11.Thereby realized recycling of hot blast, saved the energy.
One skilled in the art will appreciate that in other embodiments of the invention the open type air channel also can be adopted in air channel of the present invention, in the open type air channel, do not have air return section 3, second flow equalization section 6 need be set yet.In the test section 5 thermal detector can be set.
In other embodiments of the invention, flow equalization section 4 can be set, or honeycomb 41 or turbulent net 42 only are set in the flow equalization section 4.Also view window can be set on the test section 5.Also second flow equalization section 6 can be set.
Claims (10)
1, a kind of air channel comprises pressurized segment and test section, it is characterized in that: also comprise the section of heating that is arranged between described pressurized segment and the test section, be provided with well heater in the described section of heating, be used for the air-flow of pressurized segment output is heated.
2, a kind of air channel according to claim 1 is characterized in that: also comprise flow equalization section between described section of heating and the test section, it is used for the air-flow adjustment of the section of heating output even.
3, a kind of air channel according to claim 2 is characterized in that: the closed loop air channel is adopted in described air channel, forms air return section between described section of heating and the flow equalization section, and the output of described test section links to each other with the input of pressurized segment.
4, a kind of air channel according to claim 3, it is characterized in that: described pressurized segment adopts centrifugal fan, the input end of described impeller of blower links to each other with the output terminal of described test section, and the gas that the output terminal output of described blower fan has certain wind speed flows to the section of heating.
5, a kind of air channel according to claim 3 is characterized in that: also comprise second flow equalization section between the output terminal of described test section and the input end of pressurized segment, it is used for the tail wind of described test section stablized and outputs to described pressurized segment after adjusting.
6, according to claim 4 or 5 described any air channels, it is characterized in that: also comprise frequency converter, it links to each other with the motor of described blower fan, is used to control rotating speed of motor; The motor of described blower fan is arranged on outside the air channel.
7, according to the described any air channel of claim 1 to 5, it is characterized in that: also comprise controller and thermal detector; Described thermal detector is arranged in the described test section; Described controller links to each other with described thermal detector with the well heater of the described section of heating, and is used for controlling according to the output signal of described thermal detector the output of described well heater.
8, a kind of air channel according to claim 2 is characterized in that: described flow equalization section comprises honeycomb and/or at least one turbulent net.
9, a kind of air channel according to claim 1 is characterized in that: be provided with evaporator in the described section of heating.
10, a kind of control method of air channel is characterized in that, comprising:
(a), regulate the frequency of frequency converter, with the rotating speed of control blower fan;
(b), after thermal detector detected temperature in the test section and arrives preset value, controller output a control signal to the well heater in the section of heating, and controls the work of described well heater discontinuity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610062404 CN100520433C (en) | 2006-08-31 | 2006-08-31 | Air passage and its control method |
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|---|---|---|---|
| CN 200610062404 CN100520433C (en) | 2006-08-31 | 2006-08-31 | Air passage and its control method |
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| Publication Number | Publication Date |
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| CN1945347A true CN1945347A (en) | 2007-04-11 |
| CN100520433C CN100520433C (en) | 2009-07-29 |
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| Application Number | Title | Priority Date | Filing Date |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101866531A (en) * | 2010-06-01 | 2010-10-20 | 东莞市升微机电设备科技有限公司 | Detection system for detecting temperature alarm |
| CN102135467A (en) * | 2010-12-27 | 2011-07-27 | 中国科学院光电技术研究所 | Hot-wind turbulence simulation device |
| CN102428981A (en) * | 2011-11-28 | 2012-05-02 | 新麦机械（无锡）有限公司 | Variable frequency fermenting box |
| CN107300479A (en) * | 2017-08-16 | 2017-10-27 | 国网湖南省电力公司 | A kind of test platform and its application process of SVG heat-pipe radiators characteristic |
| CN110174234A (en) * | 2019-01-15 | 2019-08-27 | 昆山市三维换热器有限公司 | Multi-functional wind system |
| CN110686916A (en) * | 2019-10-24 | 2020-01-14 | 苏州创驰检测技术有限公司 | Air duct heater detection device |
| CN112783238A (en) * | 2020-12-30 | 2021-05-11 | 天津森罗科技股份有限公司 | Temperature and humidity uniformity adjusting system |
| KR20220090798A (en) * | 2020-12-23 | 2022-06-30 | 주식회사 유니테스트 | Semiconductor test apparatus provided with means for uniform cooling |
-
2006
- 2006-08-31 CN CN 200610062404 patent/CN100520433C/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101866531A (en) * | 2010-06-01 | 2010-10-20 | 东莞市升微机电设备科技有限公司 | Detection system for detecting temperature alarm |
| CN102135467A (en) * | 2010-12-27 | 2011-07-27 | 中国科学院光电技术研究所 | Hot-wind turbulence simulation device |
| CN102135467B (en) * | 2010-12-27 | 2012-09-05 | 中国科学院光电技术研究所 | Hot-wind turbulence simulation device |
| CN102428981A (en) * | 2011-11-28 | 2012-05-02 | 新麦机械（无锡）有限公司 | Variable frequency fermenting box |
| CN107300479A (en) * | 2017-08-16 | 2017-10-27 | 国网湖南省电力公司 | A kind of test platform and its application process of SVG heat-pipe radiators characteristic |
| CN107300479B (en) * | 2017-08-16 | 2023-11-14 | 国网湖南省电力公司 | Test platform for SVG heat pipe radiator characteristics and application method thereof |
| CN110174234A (en) * | 2019-01-15 | 2019-08-27 | 昆山市三维换热器有限公司 | Multi-functional wind system |
| CN110686916A (en) * | 2019-10-24 | 2020-01-14 | 苏州创驰检测技术有限公司 | Air duct heater detection device |
| KR20220090798A (en) * | 2020-12-23 | 2022-06-30 | 주식회사 유니테스트 | Semiconductor test apparatus provided with means for uniform cooling |
| KR102490878B1 (en) * | 2020-12-23 | 2023-01-20 | 주식회사 유니테스트 | Semiconductor test apparatus provided with means for uniform cooling |
| CN112783238A (en) * | 2020-12-30 | 2021-05-11 | 天津森罗科技股份有限公司 | Temperature and humidity uniformity adjusting system |
| CN112783238B (en) * | 2020-12-30 | 2023-01-06 | 天津森罗科技股份有限公司 | Temperature and humidity uniformity adjusting system |
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| Publication number | Publication date |
|---|---|
| CN100520433C (en) | 2009-07-29 |
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