CN107246974A - A kind of air heat exchanger heat exchange performance and dehumidifying/icing measure examination ducting system - Google Patents
A kind of air heat exchanger heat exchange performance and dehumidifying/icing measure examination ducting system Download PDFInfo
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- CN107246974A CN107246974A CN201710300351.8A CN201710300351A CN107246974A CN 107246974 A CN107246974 A CN 107246974A CN 201710300351 A CN201710300351 A CN 201710300351A CN 107246974 A CN107246974 A CN 107246974A
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
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Abstract
Examination ducting system is measured the present invention relates to a kind of air heat exchanger heat exchange performance and dehumidifying/icing, more particularly to a kind of air evaporator/condenser heat exchange property and dehumidifying/icing measure examination ducting system.Testing ducting system includes temperature control evaporator, electric heater, rectifier is damped before air velocity transducer, air velocity transducer, mass sensor, blower fan, ultrasonic humidifier, rectifier is damped before test evaporator/condenser, temperature sensor before test evaporator/condenser, humidity sensor before test evaporator/condenser, test evaporator/condenser, annular passage is flexible coupling, incubator, rectifier is damped after test evaporator/condenser, temperature sensor after test evaporator/condenser, humidity sensor after test evaporator/condenser, the special soaking zone of annular passage and the common soaking zone of annular passage.With temperature, humidity and wind speed before accurate control test evaporator/condenser, the Frost formation process and defrost process of evaporator can be observed and recorded to test different types, size evaporator/condenser heat exchange property, the advantage of dehumidifying/icing amount of evaporator.
Description
Technical field
Examination ducting system, more particularly to one are measured the present invention relates to a kind of air heat exchanger heat exchange performance and dehumidifying/icing
Plant air evaporator/condenser heat exchange property and dehumidifying/icing measures examination ducting system, belong to refrigeration technology field.
Background technology
Evaporator and condenser are two important components in refrigeration system, and the quality of its performance directly influences whole
The performance of individual refrigeration system.But, refrigerant flow low the characteristics of small for evaporator of refrigerator and condenser heat exchange amount, test
Evaporator/condenser puts environment influences larger including wind speed uniformity, temperature and humidity on its performance test, obtains high accuracy
Test result it is relatively difficult.Therefore, design a set of air heat exchanger heat exchange performance and dehumidifying/icing measurement examination ducting system must
It is indispensable.
Found through patent retrieval, a kind of entitled " temperature and humidity control device of low temperature humidity chamber of Zhang Min et al. applications
And method "（The patent No. 201610602207.5）Patent of invention.A kind of temperature and humidity control device of low temperature humidity chamber is provided
And method, including constant temperature and humidity external control unit outside and constant temperature and humidity internal control unit and gas channel therebetween, to need
The material of low temperature environment provides the storage environment of constant temperature and humidity.But, the low temperature humidity chamber is only material and provides low temperature
Environment, and the not control to wind speed, therefore it is only suitable for providing the storage environment of material constant temperature and humidity.
Found through patent retrieval, entitled " a kind of constant temperature and humidity system " of Zhang Yu et al. applications（The patent No.
201510459983.X）Patent of invention.There is provided a kind of constant temperature and humidity system, it can detect that various materials are heat-resisting, cold-resistant, resistance to
Wet, dry tolerance energy.Top is provided with rotary fan in constant temperature and humidity system raising middle flask body, realizes gas circulation, reaches warm in system
The uniform effect of humidity.Experiment test environment has a larger temperature test scope, but requirement and control not to wind speed, because
This test to air evaporator and condenser is simultaneously not suitable for.
The content of the invention
The task of the present invention is that providing a kind of air heat exchanger heat exchange performance and dehumidifying/icing measures examination air channel system
System.
To realize invention task, its technical solution is：
A kind of air heat exchanger heat exchange performance and dehumidifying/icing measure examination ducting system, including annular passage, temperature control evaporator,
Rectifier, air velocity transducer, mass sensor, blower fan, ultrasonic humidifier, test are damped before electric heater, air velocity transducer
Damped before evaporator/condenser wet before temperature sensor, test evaporator/condenser before rectifier, test evaporator/condenser
Damped after degree sensor, test evaporator/condenser, being flexible coupling of annular passage, incubator, test evaporator/condenser whole
Humidity sensor, annular passage are special after temperature sensor, test evaporator/condenser after stream device, test evaporator/condenser
Soaking zone and the common soaking zone of annular passage.Temperature control evaporator provides air in cold, annular passage by a set of refrigeration system
Temperature is controlled by the electric heater of setting.Damping is all provided with before temperature, speed and humidity sensor in annular passage whole
Device is flowed so that air is evenly distributed.The humidification amount of ultrasonic humidifier is controlled and measured by mass sensor, it is ensured that
It is stable in setting value by the air humidity of test evaporator/condenser.Annular passage be divided into the special soaking zone of annular passage and
The common soaking zone of annular passage, incubator annular air channel belongs to special soaking zone, using vacuum or the side of Multi-layer air sandwich
Method, which is reduced, posts aluminum foil and adhesive tape reduction radiation heat transfer on the outside of heat conduction, heat convection, annular passage.Outside the common soaking zone of annular passage
Side is incubated using heat-preservation cotton.Air themperature by measuring before test evaporator/condenser, after test evaporator/condenser and
Humidity and test evaporator/condenser refrigerant out temperature determine the heat exchange property by test evaporator/condenser
And dehumidifying/icing amount.The special soaking zone of annular passage can be made using transparent material, in order to observe and record test evaporation
The Frost formation process and defrost process of device.
Examination ducting system, air heat-exchange are measured by a kind of air heat exchanger heat exchange performance of the present invention and dehumidifying/icing
The method of testing and step of device heat exchange property and dehumidifying/icing amount are as follows：
1) computational methods of heat exchange property and dehumidifying/icing amount
Evaporator heat exchange amount：
QE=Ge,a(he,1-he,2)
In formula, QERecepted the caloric for evaporator, W；Ge,aFor the mass flow of air, kg/s；he,1、he,2Respectively turnover is steamed
The enthalpy of device air is sent out, is tried to achieve by turnover evaporator air temperature and relative humidity, J/kg.
Evaporator heat exchange coefficient：
In formula, keFor the coefficient of heat transfer of evaporator, W/ (m2·K)；It is approximate etc. for evaporator refrigerant side mean temperature
In evaporating temperature t in evaporatore,0(i.e. the corresponding refrigerant saturation temperature of evaporator exit pressure), DEG C；Directly cooling evaporator is empty
Gas side mean temperature is equal to evaporator simulating chamber test zone temperature, i.e.,Δte,mExchanged heat for evaporator logarithm warm
Difference, DEG C；Fe,aFor evaporator air side effective heat exchange area, m2。
Switching factor：
Logarithmic mean temperature difference (LMTD)：
In formula, te,1, te,2Evaporator air temperature is respectively passed in and out, DEG C；For evaporator evaporation temperature, DEG C.
Evaporator air side effective heat exchange area：
Fe,a=Fe,t+Fe,f
In formula, Fe,tAnd Fe,fThe respectively external surface area of heat exchange pipe of evaporator and the fin gross area, m2。
The heat exchange amount of condenser：
QC=Gc,a(hc,2-hc,1)
In formula, QCFor condenser heat dissipation capacity, W；Gc,aFor the mass flow of air, kg/s；hc,1、hc,2Respectively pass in and out condenser
The enthalpy of air, is tried to achieve, J/kg by turnover condenser air temperature and relative humidity.
The condenser coefficient of heat transfer：
In formula, kcFor the coefficient of heat transfer of condenser, W/ (m2·K)；For condenser refrigerant side mean temperature, DEG C；Direct-cooling type
Condenser air side mean temperature is equal to condenser simulating chamber test zone temperature, i.e.,Δtc,mFor condenser pair
Number heat transfer temperature difference, DEG C；Fc,aFor condenser air side effective heat exchange area, m2。
Switching factor：
Logarithmic mean temperature difference (LMTD)：
In formula, tc,1, tc,2Air-cooled condenser air themperature is respectively passed in and out, DEG C.For condenser condensation temperature, DEG C
Condenser air side effective heat exchange area：
Fc,a=Fc,t+Fc,f
In formula, Fc,tAnd Fc,fThe respectively external surface area of condenser heat-exchange pipes and the fin gross area, m2。
Condenser refrigerant side mean temperature：
In formula, tc,inAnd tc,outRespectively condenser imports and exports refrigerant temperature, DEG C；For condensation temperature in condenser (i.e.
The corresponding refrigerant saturation temperature of condensator outlet pressure), DEG C.
Dehumidifying/icing amount：
mW=Ga(d1-d2)
In formula, mWFor air heat exchanger dehumidifying/icing amount, kg/s；GaFor the mass flow of air, kg/s；d1, d2Changed for air
Hot device imports and exports the water capacity of air, is tried to achieve by the temperature and relative humidity of import and export air heat exchanger, kg/kg dry air.
2）Testing procedure and method
During test evaporator, test evaporator is positioned over to the place that is flexible coupling of annular passage, refrigeration where temperature control evaporator is opened
System, electric heater, blower fan and ultrasonic humidifier.Heated by the temperature adjustment electric heater before collecting test evaporator,
So that temperature reaches setting value before test evaporator.Humidity before collecting test evaporator, number is tested by mass sensor
According to the humidification amount of control ultrasonic humidifier, the humidity before test evaporator is set to reach setting value.Damped before air velocity transducer whole
Stream device makes wind speed uniform, and measuring wind speed is more accurate；Rectifier is damped before test evaporator/condenser to be made by test evaporator
Wind speed, temperature and humidity are evenly；Rectifier is damped after test evaporator/condenser surveys temperature and humidity after test evaporator
Examination is more accurate.
When testing condenser, test condenser is positioned over to the place that is flexible coupling of annular passage, temperature control evaporator place is opened
Refrigeration system, electric heater, blower fan and ultrasonic humidifier.Added by the temperature adjustment electric heater before collecting test condenser
Heat, so that temperature reaches setting value before test condenser.Humidity before collecting test condenser, is tested by mass sensor
Data control the humidification amount of ultrasonic humidifier, the humidity before test condenser is reached setting value.Damped before air velocity transducer
Rectifier makes wind speed uniform, and measuring wind speed is more accurate；Rectifier is damped before test evaporator/condenser to be made by testing condenser
Wind speed, temperature and humidity evenly；Rectifier is damped after test evaporator/condenser makes temperature and humidity after test condenser
Test is more accurate.
Brief description of the drawings
Fig. 1 is that the air heat exchanger heat exchange performance of the embodiment of the present invention and dehumidifying/icing measure examination ducting system principle and shown
It is intended to.
Embodiment
Below in conjunction with the accompanying drawings, by specific embodiment, technical scheme is illustrated.
The embodiments of the invention provide a kind of test ducting system for providing constant-temperature constant-humidity environment, Fig. 1 is refer to, including：
Annular passage, electric heater 1, air channel support 2, damping rectifier 3 before air velocity transducer, air velocity transducer 4, mass sensor 5,
Temperature before rectifier 8, test evaporator/condenser is damped before blower fan 6, ultrasonic humidifier 7, test evaporator/condenser to pass
Humidity sensor 10 before sensor 9, test evaporator/condenser, test evaporator/condenser 11, annular passage be flexible coupling 12,
Rectifier 14, the special soaking zone 15 of annular passage, test evaporator/condensation are damped after incubator 13, test evaporator/condenser
The common soaking zone 18 of humidity sensor 17, annular passage and temperature control steam after temperature sensor 16, test evaporator/condenser after device
Send out device 19.Cold in temperature control evaporator is provided by extra a set of refrigeration system, and electric heater is according to test evaporator/condensation
The temperature adjustment heating of temperature sensor measurement before device.Being flexible coupling for annular passage can place the evaporation of different Dimension Types
Device/condenser.The special soaking zone 15 of annular passage can be made using transparent material.
Examination ducting system is measured by a kind of above-described air heat exchanger heat exchange performance and dehumidifying/icing, test is steamed
Step is as follows when sending out device/condenser：
During test evaporator, test evaporator 11 is placed on being flexible coupling at 12 of annular passage.The special soaking zone 15 of annular passage
With the inner circulating air of the common soaking zone of annular passage 18 power is provided by blower fan 6.Rectifier is damped before test evaporator/condenser
8 ensure to flow through the temperature of air before test evaporator, humidity and wind speed uniformly, and temperature and humidity is by test evaporator/condenser
Humidity sensor 10 is measured before preceding temperature sensor 9 and test evaporator/condenser, data transfer to control system, from
And controlling the heating of electric heater 1 and ultrasonic humidifier 7 to humidify, humidification amount is controlled by mass sensor 5.Test evaporator/
Rectifier 14 is damped after condenser to ensure after test evaporator/condenser after temperature sensor 16 and test evaporator/condenser
The measurement of humidity sensor 17 passes through the accuracy of temperature and humidity after test evaporator.Rectifier 3 is damped before air velocity transducer to be made
It is uniform by its wind speed, it is ensured that the measurement accuracy of air velocity transducer 4, so as to adjust the frequency of blower fan 6, make by testing evaporation
The wind speed of device reaches setting value.Temperature control evaporator 19 provides cold by extra a set of refrigeration system, by the special guarantor of annular passage
Air cooling-down in temperature section 15 and the common soaking zone 18 of annular passage, electric heater 1 is passed by temperature before test evaporator/condenser
The control heating of the measurement data of sensor 9, makes to reach setting value by the air themperature of test evaporator.
When testing condenser, test condenser 11 is placed on being flexible coupling at 12 of annular passage.The special insulation of annular passage
Section 15 and the common inner circulating air of soaking zone 18 of annular passage provide power by blower fan 6.Damped before test evaporator/condenser whole
It is uniform that stream device 8 ensures to flow through the temperature of air, humidity and wind speed before test condenser, and temperature and humidity is by test evaporator/cold
Humidity sensor 10 is measured before temperature sensor 9 and test evaporator/condenser before condenser, and data transfer is to control
System, so as to control the heating of electric heater 1 and ultrasonic humidifier 7 to humidify, humidification amount is controlled by mass sensor 5.Test is steamed
Send out damping rectifier 14 after device/condenser and ensure temperature sensor 16 and test evaporator/condensation after test evaporator/condenser
Humidity sensor 17 measures the accuracy by testing temperature and humidity after condenser after device.Rectifier is damped before air velocity transducer
3 make it is uniform by its wind speed, it is ensured that the measurement accuracy of air velocity transducer 4, so as to adjust the frequency of blower fan 6, make by test
The wind speed of condenser reaches setting value.Temperature control evaporator 19 provides cold by extra a set of refrigeration system, and annular passage is special
Air cooling-down in different soaking zone 15 and the common soaking zone 18 of annular passage, electric heater 1 passes through warm before test evaporator/condenser
The control heating of the measurement data of sensor 9 is spent, makes to reach setting value by testing the air themperature of condenser.
Claims (6)
1. a kind of air heat exchanger heat exchange performance and dehumidifying/icing measure examination ducting system, including temperature control evaporator, electrical heating
Before device, air velocity transducer damp rectifier, air velocity transducer, mass sensor, blower fan, ultrasonic humidifier, test evaporator/
Rectifier is damped before condenser, humidity sensor before temperature sensor, test evaporator/condenser before test evaporator/condenser
Damping rectifier after device, test evaporator/condenser, being flexible coupling of annular passage, incubator, test evaporator/condenser, survey
Try after evaporator/condenser humidity sensor, the special soaking zone of annular passage after temperature sensor, test evaporator/condenser
With the common soaking zone of annular passage, the temperature that temperature control evaporator provides air in cold, annular passage by a set of refrigeration system is led to
Electric heater control is crossed in design temperature；It is all provided with damping rectifier before temperature, speed and humidity sensor in annular passage
So that the temperature of air, speed and moisture distribution are uniform；The humidification amount of ultrasonic humidifier is controlled by mass sensor
System, it is ensured that stable in setting value by the air humidity of test evaporator/condenser；Annular passage is divided into the special guarantor of annular passage
Temperature section and the common soaking zone of annular passage, incubator annular air channel belong to special soaking zone, are pressed from both sides using vacuum or multi-layer air
The method of layer, which is reduced, posts aluminum foil and adhesive tape reduction radiation heat transfer on the outside of heat conduction, heat convection, annular passage, annular passage is commonly protected
Using heat-preservation cotton insulation on the outside of temperature section；Pass through the air themperature before test evaporator/condenser, after test evaporator/condenser
With the measurement of humidity, and to the measurement by test evaporator/condenser refrigerant out temperature, evaporation is tested it is determined that passing through
The heat exchange property of device/condenser and the dehumidifying of test evaporator/icing amount, the special soaking zone of annular passage can use transparent material
Material makes, in order to observe and record the Frost formation process and defrost process of evaporator.
2. a kind of air heat exchanger heat exchange performance as claimed in claim 1 and dehumidifying/icing measure examination ducting system, its feature
Being can be with the evaporator and condenser of test different types, size.
3. a kind of air heat exchanger heat exchange performance as claimed in claim 1 and dehumidifying/icing measure examination ducting system, test is steamed
The temperature before device/condenser is sent out by temperature control evaporator and electric heater co- controlling.
4. a kind of air heat exchanger heat exchange performance as claimed in claim 1 and dehumidifying/icing measure examination ducting system, test is steamed
Humidity before hair device/condenser reaches setting value by mass sensor control ultrasonic humidifier regulation.
5. a kind of air heat exchanger heat exchange performance as claimed in claim 1 and dehumidifying/icing measure examination ducting system, heat-exchange performance
Energy and dehumidifying/icing amount pass through to the air themperature and humidity before test evaporator/condenser, after test evaporator/condenser
And the survey calculation of test evaporator/condenser refrigerant out temperature is tried to achieve.
6. a kind of air heat exchanger heat exchange performance as claimed in claim 1 and dehumidifying/icing measure examination ducting system, wind speed is passed
Damped before sensor before rectifier, test evaporator/condenser and damp rectifier after damping rectifier and test evaporator/condenser
It is uniformly distributed the temperature, humidity and wind speed of air.
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| CN109991027A (en) * | 2017-12-29 | 2019-07-09 | 百林机电科技（苏州）有限公司 | A kind of low-temperature air-cooling heat exchanger performance Detecting data |
| CN111397708A (en) * | 2020-04-24 | 2020-07-10 | 上海交通大学 | Non-contact measuring device for ice amount of wet dust on surface of heat exchanger fin |
| CN112432799A (en) * | 2020-11-05 | 2021-03-02 | 青岛大学 | Desktop type empty heat pipe heat exchanger capability test device |
| CN112834558A (en) * | 2019-11-22 | 2021-05-25 | 盾安汽车热管理科技有限公司 | Battery cooling system test bench and test method of battery cooling system |
| CN113970453A (en) * | 2021-10-26 | 2022-01-25 | 中国矿业大学 | Heat and moisture exchange performance testing device of large enthalpy difference cooling equipment in heat damage mine mining area |
| CN114739714A (en) * | 2022-05-07 | 2022-07-12 | 上海金脉汽车电子有限公司 | Testing device and method for air-heating PTC product |
| CN116559974A (en) * | 2023-07-07 | 2023-08-08 | 太原中北新缘科技中心(有限公司) | Heater type all-wind direction meteorological sensor |
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| CN112432799B (en) * | 2020-11-05 | 2022-12-16 | 青岛大学 | Desktop type empty heat pipe heat exchanger capability test device |
| CN113970453A (en) * | 2021-10-26 | 2022-01-25 | 中国矿业大学 | Heat and moisture exchange performance testing device of large enthalpy difference cooling equipment in heat damage mine mining area |
| CN113970453B (en) * | 2021-10-26 | 2023-09-26 | 中国矿业大学 | Heat-moisture exchange performance testing device of large enthalpy difference cooling equipment in heat damage mine mining area |
| CN114739714A (en) * | 2022-05-07 | 2022-07-12 | 上海金脉汽车电子有限公司 | Testing device and method for air-heating PTC product |
| CN116559974A (en) * | 2023-07-07 | 2023-08-08 | 太原中北新缘科技中心(有限公司) | Heater type all-wind direction meteorological sensor |
| CN116559974B (en) * | 2023-07-07 | 2024-01-02 | 太原中北新缘科技中心(有限公司) | Heater type all-wind direction meteorological sensor |
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