CN109946098A - A kind of frozen condition lower surface cooler performance testing stand of enclosed band centre refrigerant - Google Patents
A kind of frozen condition lower surface cooler performance testing stand of enclosed band centre refrigerant Download PDFInfo
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- CN109946098A CN109946098A CN201910114071.7A CN201910114071A CN109946098A CN 109946098 A CN109946098 A CN 109946098A CN 201910114071 A CN201910114071 A CN 201910114071A CN 109946098 A CN109946098 A CN 109946098A
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- 239000003507 refrigerant Substances 0.000 title claims abstract description 48
- 238000012360 testing method Methods 0.000 title claims abstract description 31
- 238000001816 cooling Methods 0.000 claims abstract description 27
- 238000003860 storage Methods 0.000 claims abstract description 24
- 238000006243 chemical reaction Methods 0.000 claims abstract description 15
- 238000005057 refrigeration Methods 0.000 claims abstract description 13
- 230000006641 stabilisation Effects 0.000 claims abstract description 9
- 238000011105 stabilization Methods 0.000 claims abstract description 9
- 239000000498 cooling water Substances 0.000 claims description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 239000002826 coolant Substances 0.000 claims description 9
- 238000005273 aeration Methods 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 5
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 3
- 230000002463 transducing effect Effects 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 2
- 239000011810 insulating material Substances 0.000 claims 1
- 238000005259 measurement Methods 0.000 abstract description 11
- 238000005276 aerator Methods 0.000 abstract description 7
- 238000010257 thawing Methods 0.000 abstract description 5
- 238000000034 method Methods 0.000 description 5
- 238000013461 design Methods 0.000 description 4
- 238000001704 evaporation Methods 0.000 description 4
- 238000011056 performance test Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000004378 air conditioning Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000012774 insulation material Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000000523 sample Substances 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 239000005030 aluminium foil Substances 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000007791 dehumidification Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Abstract
The invention discloses a kind of frozen condition lower surface cooler performance testing stands of refrigerant among enclosed band, including ducting system, R22 refrigeration system, component cooling system and acquisition control system.Frequency conversion fan and plenum chamber, orifice flowmeter, heater, seam humidifier, current stabilization net, rectifier and surface-cooler in ducting system are sequentially connected.After refrigerant in component cooling system sufficiently exchanges heat in refrigerant storage tank with the R22 in coil evaporator, it is back in refrigerant storage tank after variable frequency pump is connect with surface-cooler and vortex-shedding meter.The testing stand can be required according to the state parameter of air side and medium side different under frozen condition, it is automatically adjusted to specified inlet condition parameter, the measurement for realizing Cooling and Heat Source discharge state parameter, obtains the unsteady-state behaviour characteristic curve of frozen condition following table aerator.In addition, the testing stand changes the functions such as test core there are also hot gas defrosting, easily, have the characteristics that test scope is wide, measurement accuracy is high, sustainable operation.
Description
Technical field
The present invention relates to a kind of frozen condition following tables of refrigerant among surface-cooler technical field more particularly to enclosed band
Aerator performance test stand.
Background technique
The capital equipment that surface-cooler is adjusted as aerial temperature and humidity, it is processed during common cool-down dehumidification
When air flows through surface-cooler, condensed water can be precipitated in surface, and the hydrophilic aluminium foil applied in fin pipe surface can make the water condensed
Pearl is easily spread out and flows downward along sheet material, and final condensed water can be emptied through drip tray and postposition water pipe.And for winter
The outdoor heat exchanger of air-conditioning heating and certain such as explosive productions storage, pharmaceutical production transport, precision instrument production and application
Etc. craftsmanships application air-conditioning indoor heat exchanger for, required controlled ambient temperature and humidity be lower than dew-point temperature, refrigeration
The evaporating temperature of system is at 0 DEG C or less.Since evaporating temperature is below the freezing point, frost can occur for surface-cooler surface.Wing
The frosting of piece surface can be such that ventilation section is gradually blocked by frost, and heat-exchange capacity declines therewith, finally cause the temperature of controlled environment
Humidity is difficult to ensure.Therefore, in order to probe into the unsteady-state behaviour feature of frozen condition following table aerator, and for being used in
Surface-cooler under frosting mode carries out Optimal Structure Designing, and it is cooling to establish a set of surface that can flexibly change the outfit under frozen condition
Device tests core, the performance test stand of Cooling and Heat Source variable temperatures is a set of effective research approach.
Summary of the invention
In view of the above problems, the present invention is intended to provide the frozen condition lower surface of refrigerant is cold among a kind of enclosed band
But device performance test stand provides reality to study the unsteady-state behaviour feature and structure optimization design of frozen condition following table aerator
Support is tested, provides detection platform to probe into the actual utility of the Defrost methods such as electric heating, water.
To achieve the goals above, the technical solution adopted in the present invention is as follows:
A kind of frozen condition lower surface cooler performance testing stand of enclosed band centre refrigerant, including ducting system, R22 refrigeration system
System, component cooling system and acquisition control system；Wherein,
The ducting system successively includes closed type air duct, frequency conversion fan and plenum chamber along wind direction, in the closed type air duct
Interior to set gradually heater, seam humidifier and surface-cooler along wind direction, the heater is located at going out for the plenum chamber
Mouth end；
The R22 refrigeration system be set to the closed type air duct except, including condenser, electromagnetic expanding valve, coil evaporator with
And compressor, closed tube is formed by cooling line between the condenser, electromagnetic expanding valve, coil evaporator and compressor
Road；
The component cooling system includes refrigerant storage tank and coolant media, and coolant media is injected in the refrigerant storage tank, described
Coil evaporator is mounted in the refrigerant storage tank；
The acquisition control system comes from heater, seam humidifier, surface-cooler, the R22 refrigeration system for acquiring
And the various transducing signals of component cooling system, and tested.
Preferably, current stabilization net and rectifier are also set up between the surface-cooler and the seam humidifier, it is described
Rectifier is located at the outlet end of the current stabilization net.
Preferably, being equipped with orifice flowmeter between the plenum chamber and the heater.
Preferably, in the front and back air duct of heater, seam humidifier and surface-cooler in the ducting system
Setting Temperature Humidity Sensor and pressure sensor, sensor signal are connected with the acquisition control system.
Preferably, connection first is cooling between the outlet end of the refrigerant storage tank and the input end of the surface-cooler
Water pipe connects the second cooling water pipe between the input end of the refrigerant storage tank and the outlet end of the surface-cooler.
Preferably, variable frequency pump is arranged on first cooling water pipe, vortex street stream is set on second cooling water pipe
The equal acquisition control system of the signal of the frequency converter of meter, vortex-shedding meter and variable frequency pump connects.
Preferably, the air inlet end in the frequency conversion fan also installs aeration valve.
Preferably, the pipeline of the ducting system, R22 refrigeration system and component cooling system and component outer ring are surrounded by
Thermal insulation material.
Preferably, the coolant media is the mixture of the second alcohol and water of proportion.
The beneficial effects of the present invention are:
A kind of universal performance of the enclosed surface-cooler with intermediate refrigerant of the present invention under frozen condition tests dress
It sets, can be under different air side temperature and humidity and medium side temperature and the operating condition of flow, compbined test analyzes fin pipe surface hair
The unsteady-state behaviour feature of surface-cooler when raw frost；During unstable state test, dynamic real-time measurement surface is cooling
Device Cooling and Heat Source imports and exports state parameter, wind locking situation caused by real-time measurement frosting and can change in surface-cooler Frost formation process
The unsteady-state behaviour of hot device；Hot gas defrosting function is carried in experimental rig, can be recycled and be tied under the premise of not dismantling component
Surface-cooler performance test under white operating condition；Surface-cooler is readily disassembled and replaces, and can be to apply under frozen condition
Surface-cooler Optimal Structure Designing provides detection platform.
Detailed description of the invention
Fig. 1 is flow diagram of the present invention.
Wherein: 1- frequency conversion fan, 2- plenum chamber, 3- orifice flowmeter, 4- heater, 5- seam humidifier, 6- current stabilization net,
7- rectifier, 8- surface-cooler, 9- aeration valve, 10- compressor, 11- condenser, 12- electromagnetic expanding valve, the evaporation of 13- coil pipe
Device, 14- refrigerant storage tank, 15- variable frequency pump, 16- vortex-shedding meter, 17- acquisition control instrument.
Specific embodiment
In order to make those skilled in the art be better understood on technical solution of the present invention, with reference to the accompanying drawing and
Embodiment is further described technical solution of the present invention.
Embodiment: referring to shown in attached drawing 1, a kind of 8 performance of the frozen condition following table aerator examination of enclosed band centre refrigerant
Test platform, including ducting system, R22 refrigeration system, component cooling system and acquisition control system, the ducting system, R22 system
The pipeline and component outer ring of cooling system and component cooling system are surrounded by thermal insulation material；Wherein,
The ducting system successively includes closed type air duct, frequency conversion fan 1 and plenum chamber 2 along wind direction, the plenum chamber 2 and institute
It states and is equipped with orifice flowmeter 3 between heater 4, aeration valve 9 is also installed in the air inlet end of the frequency conversion fan 1, is closed described
Heater 4, seam humidifier 5 and surface-cooler 8 are set gradually along wind direction in box-like air duct, the heater 4 is located at institute
State the outlet end of plenum chamber 2；Current stabilization net 6 and rectifier 7 are also set up between the surface-cooler 8 and the seam humidifier 5,
The rectifier 7 is located at the outlet end of the current stabilization net 6；
The R22 refrigeration system is set to except the closed type air duct, including the evaporation of condenser 11, electromagnetic expanding valve 12, coil pipe
Device 13 and compressor 10, by cold between the condenser 11, electromagnetic expanding valve 12, coil evaporator 13 and compressor 10
But pipeline forms closure pipeline；
The component cooling system includes refrigerant storage tank 14 and coolant media, and the coolant media is the second alcohol and water of proportion
Mixture, the refrigerant storage tank 14 is interior to inject coolant media, and the coil evaporator 13 is mounted in the refrigerant storage tank 14；Institute
It states and connects the first cooling water pipe between the outlet end of refrigerant storage tank 14 and the input end of the surface-cooler 8, the refrigerant storage
The second cooling water pipe is connected between the input end of slot 14 and the outlet end of the surface-cooler 8；On first cooling water pipe
Variable frequency pump 15 is set, vortex-shedding meter 16 is set on second cooling water pipe.
The acquisition control system comes from heater 4, seam humidifier 5, surface-cooler 8, the R22 system for acquiring
The various transducing signals of cooling system and component cooling system are connect with acquisition control instrument 17 by signal wire, and are tested.
Control method embodiment:
Temperature and humidity is respectively provided in the front and back air duct of heater 4, seam humidifier 5 and surface-cooler 8 in the ducting system
Sensor and pressure sensor, sensor signal and acquisition control instrument 17 connect；1 frequency converter of orifice flowmeter 3 and frequency conversion fan
Signal and acquisition control instrument 17 connect；The on-off model and acquisition control instrument of electromagnetic expanding valve 12 in R22 refrigeration system
17 connections；Before and after the intermediate refrigerant pipeline of refrigerant storage tank 14, variable frequency pump 15 and surface-cooler 8 in component cooling system all
Temperature sensor and pressure sensor are set, and sensor signal and acquisition control instrument 17 connect；Vortex-shedding meter 16 and frequency conversion water
The signal and acquisition control instrument 17 for pumping 15 frequency converters connect；
The adjusting of air quantity is fed back according to the signal of orifice flowmeter 3 in the ducting system, and via the frequency converter of frequency conversion fan 1
It completes to adjust；The adjusting of aerial temperature and humidity is according to 5 front and back air duct of heater 4 and seam humidifier before 8 arrival end of surface-cooler
Interior Temperature Humidity Sensor signal feedback, and complete to adjust via the input electric power of heater 4 and seam humidifier 5；Refrigerant
The adjusting of 14 discharge-end temperature of storage tank is controlled by the switching signal amount of electromagnetic expanding valve 12；The flow of intermediate refrigerant is adjusted according to whirlpool
The signal of street flowmeter 16 is fed back, and completes to adjust via the frequency converter of variable frequency pump 15.
The operation principle of the present invention is that:
Air in air duct after frequency conversion fan 1, into can be reduced dynamic pressure, in the plenum chamber 2 for increasing static pressure and steady air flow,
Air carries out flow measurement by the metastable orifice flowmeter 3 of air current composition after horn-like variable diameter, successively by heating
Device 4 and seam humidifier 5 pre-process aerial temperature and humidity, then make air current composition into one through current stabilization net 6 and rectifier 7
Step processing, is tested for the property by surface-cooler 8 later, and last air can enter 1 air inlet of frequency conversion fan and complete air-flow
Closed cycle.For the generation for avoiding negative pressure in enclosed air duct, aeration valve 9 is set in 1 air inlet front end of frequency conversion fan.
Air side flow is completed to adjust by the frequency converter of frequency conversion fan 1, by changing the frequency of frequency converter, the experimental rig
The test measurement being able to achieve in the wider range of flow of air side.
Aerial temperature and humidity before 8 arrival end of surface-cooler is completed by the input electric power of heater 4 and seam humidifier 5
It adjusts, which can realize the test measurement under air side difference temperature and humidity operating condition.
Intermediate refrigerant is pumped out from refrigerant storage tank 14 by variable frequency pump 15, then by the cooling incoming flow of surface-cooler 88
After air, the measurement of cold medium flux is realized into vortex-shedding meter 16, is finally returned to refrigerant storage tank 14.
The temperature of intermediate refrigerant is realized by the switching value of electromagnetic expanding valve 12 and is adjusted in refrigerant storage tank 14, the temperature of intermediate refrigerant
It spends and minimum can reach -7 DEG C.The flow of intermediate refrigerant is adjusted to be completed to adjust by the frequency converter of variable frequency pump 15.By changing electromagnetism
The aperture of expansion valve 12 and the frequency of frequency converter, the experimental rig are able to achieve the survey of the test under a variety of design conditions in cold flow side
Amount.
According to the design conditions of surface-cooler 8 to be measured, the ginseng such as temperature and humidity, pressure, the flow of monitoring and acquisition system measurement
Number passes sequentially through control system and adjusts frequency converter, the signals such as electromagnetic expanding valve aperture, to the air side of surface-cooler 8 and cold
The state parameter of matchmaker's side-entrance starts to test after reaching declared working condition, with the increase of 8 frost thickness of surface-cooler, by adopting
The state parameter for collecting 8 exit of controller recording surface cooler, can be obtained the heat transfer system of frozen condition following table aerator
Several and pressure loss coefficient；Closing variable frequency pump 15 terminates test, tunes up the input power of heater 4, carries out to surface-cooler 8
Hot gas defrosting operation；After defrosting, according to other design conditions of surface-cooler 8, above-mentioned experiment is repeated.
The testing stand can be required according to the state parameter of air side and medium side different under frozen condition, be automatically adjusted to
Specified inlet condition parameter, and realize the measurement of Cooling and Heat Source discharge state parameter, surface-cooler air side wing can be calculated
Piece surface and in refrigerant side pipe heat transfer coefficient and pressure loss coefficient, to obtain the non-steady of frozen condition following table aerator
State performance characteristic.In addition, the testing stand changes the functions such as test core there are also hot gas defrosting, easily, survey wide with test scope
The features such as accuracy of measurement height, sustainable operation.
The basic principles, main features and advantages of the present invention have been shown and described above.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the above embodiments and description only describe this
The principle of invention, without departing from the spirit and scope of the present invention, various changes and improvements may be made to the invention, these changes
Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its
Equivalent thereof.
Claims (9)
1. the frozen condition lower surface cooler performance testing stand of refrigerant among a kind of enclosed band, it is characterised in that: including air duct
System, R22 refrigeration system, component cooling system and acquisition control system；Wherein,
The ducting system successively includes closed type air duct, frequency conversion fan and plenum chamber along wind direction, in the closed type air duct
Interior to set gradually heater, seam humidifier and surface-cooler along wind direction, the heater is located at going out for the plenum chamber
Mouth end；
The R22 refrigeration system be set to the closed type air duct except, including condenser, electromagnetic expanding valve, coil evaporator with
And compressor, closed tube is formed by cooling line between the condenser, electromagnetic expanding valve, coil evaporator and compressor
Road；
The component cooling system includes refrigerant storage tank and coolant media, and coolant media is injected in the refrigerant storage tank, described
Coil evaporator is mounted in the refrigerant storage tank；
The acquisition control system comes from heater, seam humidifier, surface-cooler, the R22 refrigeration system for acquiring
And the various transducing signals of component cooling system, and tested.
2. the frozen condition lower surface cooler performance testing stand of refrigerant among a kind of enclosed band according to claim 1,
It is characterized by: current stabilization net and rectifier are also set up between the surface-cooler and the seam humidifier, the rectifier
It is located at the outlet end of the current stabilization net.
3. the frozen condition lower surface cooler performance testing stand of refrigerant among a kind of enclosed band according to claim 2,
It is characterized by: being equipped with orifice flowmeter between the plenum chamber and the heater.
4. the frozen condition lower surface cooler performance testing stand of refrigerant among a kind of enclosed band according to claim 3,
It is characterized by: being respectively provided with temperature in the front and back air duct of heater, seam humidifier and surface-cooler in the ducting system
Humidity sensor and pressure sensor, sensor signal are connected with the acquisition control system.
5. the frozen condition lower surface cooler performance testing stand of refrigerant among a kind of enclosed band according to claim 4,
It is characterized by: the first cooling water pipe is connected between the outlet end of the refrigerant storage tank and the input end of the surface-cooler,
The second cooling water pipe is connected between the input end of the refrigerant storage tank and the outlet end of the surface-cooler.
6. the frozen condition lower surface cooler performance testing stand of refrigerant among a kind of enclosed band according to claim 5,
It is characterized by: variable frequency pump is arranged on first cooling water pipe, vortex-shedding meter, whirlpool are set on second cooling water pipe
The signal of the frequency converter of street flowmeter and variable frequency pump is connect with acquisition control system.
7. the frozen condition lower surface cooler performance testing stand of refrigerant among a kind of enclosed band according to claim 1,
It is characterized by: the air inlet end in the frequency conversion fan also installs aeration valve.
8. the frozen condition lower surface cooler performance testing stand of refrigerant among a kind of enclosed band according to claim 1,
It is characterized by: the pipeline of the ducting system, R22 refrigeration system and component cooling system and component outer ring are surrounded by thermal insulating material
Material.
9. the frozen condition lower surface cooler performance testing stand of refrigerant among a kind of enclosed band according to claim 1,
It is characterized by: the coolant media is the mixture of the second alcohol and water of proportion.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
| CN110935243A (en) * | 2019-12-13 | 2020-03-31 | 陕西安得电力设备制造有限公司 | Air cooler with automatic cleaning device |
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