CN110308003A - A kind of air-conditioning system refrigeration cycle Bench test methods - Google Patents
A kind of air-conditioning system refrigeration cycle Bench test methods Download PDFInfo
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- CN110308003A CN110308003A CN201910249425.9A CN201910249425A CN110308003A CN 110308003 A CN110308003 A CN 110308003A CN 201910249425 A CN201910249425 A CN 201910249425A CN 110308003 A CN110308003 A CN 110308003A
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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
- G01M99/00—Subject matter not provided for in other groups of this subclass
- G01M99/005—Testing of complete machines, e.g. washing-machines or mobile phones
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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
- G01M99/00—Subject matter not provided for in other groups of this subclass
- G01M99/008—Subject matter not provided for in other groups of this subclass by doing functionality tests
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- General Physics & Mathematics (AREA)
- Air Conditioning Control Device (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
- Air-Conditioning For Vehicles (AREA)
Abstract
The present invention relates to a kind of air-conditioning system refrigeration cycle Bench test methods, the following steps are included: exemplar prepares, installation, pressure sensor calibration, evaporator temperature sensor is checked, TXV parameter measurement, adding amount test, refrigeration performance test and the general operation test of refrigeration cycle, the exemplar prepares to include the air-conditioning assembly with evaporator air inlet leaving air temp sensor, compressor, condenser with air inlet leaving air temp sensor, air-conditioning duct with 3 port valves, the expansion valve of different parameters and a certain amount of compressor oil, the installation environment, which is one, has vehicle representative, there is the bracket of wheel and is carried out close under the position of rack experimental enviroment.The present invention is conducive to the performance situation for timely, comprehensively, accurately understanding operating status and whole system of the air-conditioning system under different working conditions, be conducive to quick identifying system defect, accelerate quality improvement and performance boost, shorten system development cycle, the stability and reliability of lifting system.
Description
Technical field
The present invention relates to technical field of air conditioner refrigeration, specially a kind of air-conditioning system refrigeration cycle Bench test methods.
Background technique
Existing automotive air-conditioning system refrigeration cycle Bench test methods are mostly that each main engine plants or air-conditioning system producer are single
It solely formulates, ununified standard, according to the method having been recognized that, usual operating condition is relatively simple, can not comprehensively simulate vapour
Vehicle applying working condition, it will usually which there are more defects.
Evaporator surface freezes, and when system simulation operating condition is not comprehensive, vehicle can occur under the conditions of the driving cycle of part
Icing phenomenon, air conditioning exhausting amount are progressively smaller until system stalls, seriously affect the thermal comfort of cockpit；Compressor damage
It is bad, when there is icing phenomenon in system, the decline of system exchange capability of heat, liquid refrigerants in evaporator can not evaporating completely, when
After liquid refrigerants enters compressor, compressor liquid hammer will cause, and then damage compressor；System stability is poor, to system
When verifying is not enough, it is not easy the fluctuation problem of identifying system, when system pressure, temperature fluctuation are larger, will cause out wind-warm syndrome
Degree fluctuation, gives user sometimes hot and sometimes cold bad experience, serious to will cause evaporator surface icing；Vehicle verifies at high cost, work
Condition is single just to be needed to put into more resources and is verified, and vehicle verifying is affected by environment larger, when outer work condition condition
It when being unsatisfactory for, needs to increase test sample, extends the test period；Data analysis is difficult, when unsuitable rack verification method
When, the analysis of system problem is needed by a large amount of test data, in addition vehicle environmental factor is complicated, consistency is difficult to protect
Card will increase data analysis difficulty and increase the time of issue handling.
Summary of the invention
The purpose of the present invention is to provide a kind of air-conditioning system refrigeration cycle Bench test methods, to solve above-mentioned background skill
The evaporator surface proposed in art freezes, and when system simulation operating condition is not comprehensive, vehicle can go out under the conditions of the driving cycle of part
Existing icing phenomenon, air conditioning exhausting amount are progressively smaller until system stalls, seriously affect the thermal comfort of cockpit；Compressor damage
It is bad, when there is icing phenomenon in system, the decline of system exchange capability of heat, liquid refrigerants in evaporator can not evaporating completely, when
After liquid refrigerants enters compressor, compressor liquid hammer will cause, and then damage compressor；System stability is poor, to system
When verifying is not enough, it is not easy the fluctuation problem of identifying system, when system pressure, temperature fluctuation are larger, will cause out wind-warm syndrome
Degree fluctuation, gives user sometimes hot and sometimes cold bad experience, serious to will cause evaporator surface icing；Vehicle verifies at high cost, work
Condition is single just to be needed to put into more resources and is verified, and vehicle verifying is affected by environment larger, when outer work condition condition
It when being unsatisfactory for, needs to increase test sample, extends the test period；Data analysis is difficult, when unsuitable rack verification method
When, the analysis of system problem is needed by a large amount of test data, in addition vehicle environmental factor is complicated, consistency is difficult to protect
Card will increase data analysis difficulty and increase the time of issue handling.
To achieve the above object, the invention provides the following technical scheme: a kind of air-conditioning system refrigeration cycle bench test side
Method, comprising the following steps: exemplar preparation, installation, pressure sensor calibration, evaporator temperature sensor is checked, TXV parameter is surveyed
Amount, adding amount test, refrigeration performance test and the general operation test of refrigeration cycle.
The exemplar prepare include air-conditioning assembly with evaporator air inlet leaving air temp sensor, compressor, with into
The condenser of wind leaving air temp sensor, the air-conditioning duct with 3 port valves, different parameters expansion valve and a certain amount of compressor
Oil.
The installation environment, which is one, has vehicle is representative, has wheel bracket and close to rack experimental enviroment
It is carried out under position, and the assembly is connected by pipeline with compressor and condenser, abides by vehicle coordinate position, and connected empty
External blast pipe and air-conditioning assembly air inlet are adjusted, and is sealed in interface, while realizing and sealing in expansion valve entrance, is prevented
Only air is lost.
The blower motor binding post connects the power supply of an adjustable blower voltage, while surveying by voltmeter
Measure the service voltage of air blower binding post；
The compressor is mounted on the particular module of rack, realizes variable revolving speed；
The air inlet of the condenser is connected with the air outlet of condenser rack, while sealing in interface；
The air-conditioner pipe is connected with entire refrigerating circuit；
Each sensor is connected with acquisition equipment.
The pressure sensor pressure source is nitrogen, and the pressure value of each measurement point is recorded during testing, comparison mark
The value of quasi- pressure sensor judges whether each sensor is normal (0 to 15bar etc. divide 15 times measure), simultaneously because low pressure
The range of pressure sensor and the range of high-pressure pressure sensor are different, when system input pressure is greater than 15bar, low pressure sensing
Device disconnects.
The calibration method is to be disposed about a thermocouple in NTC, and two sensors are accessed acquisition equipment simultaneously,
And stand one minute in air (environment temperature is about 24 DEG C of room temperature), and NTC is inserted into ice water with thermocouple simultaneously and is mixed
It closes in object 1 minute, finally takes out.
The TXV parameter measurement is to be placed on TXV temperature sensing package in 0 DEG C of thermostat when measuring 0 DEG C of actuation value, is adjusted
The input pressure of section system adjusts to 1.03MPa toward small from big, records TXV outlet pressure, while if pressure adjusts process
In, pressure is less than 1.03MPa, and test needs to re-start:
(1) when measuring 10 DEG C of actuation values, process is same as above；
(2) after the completion of testing, actuation value of the TXV at 0 DEG C and 10 DEG C is recorded；
TXV type:
(1) cross charge --- what is be filled in temperature sensing package is the mixture of refrigerant and inert gas, is suitable for becoming discharge capacity pressure
Contracting machine；
(2) parallel filling --- what is poured in temperature sensing package is same media, is suitable for fixed displacement and compresses.
Compared with prior art, beneficial effects of the present invention are as follows:
1, the present invention is conducive to timely, comprehensively, accurately understand operation of the air-conditioning system under different working conditions
The performance situation of state and whole system is conducive to quick identifying system defect, accelerates quality improvement and performance boost, contracting
Short system development cycle, the stability and reliability of lifting system.
2, analyzed in the present invention and detecting step in further detail, and the linking between each step is more scientific, simultaneously
Also reality is more fitted in, and effectively prevents evaporator surface from freezing, is solved when system simulation operating condition is not comprehensive,
Vehicle icing phenomenon can occur under the conditions of the driving cycle of part, so that air conditioning exhausting amount is more preferably, improve the thermal comfort of cockpit
Property；Compressor damage is also prevented simultaneously, is solved when icing phenomenon occurs in system, the decline of system exchange capability of heat, evaporator
Interior liquid refrigerants can not evaporating completely the problem of, improve the stability of system, reduce vehicle verifying cost, data point
Analysis is also more simple.
Specific embodiment
Below in conjunction with the embodiment of the present invention, technical solution in the embodiment of the present invention is clearly and completely retouched
It states, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.
The present invention provides a kind of technical solution: a kind of air-conditioning system refrigeration cycle Bench test methods, comprising the following steps:
Exemplar preparation, installation, pressure sensor calibration, evaporator temperature sensor check, TXV parameter measurement, adding amount test, system
Cold performance test and the general operation test of refrigeration cycle.
The exemplar prepare include air-conditioning assembly with evaporator air inlet leaving air temp sensor, compressor, with into
The condenser of wind leaving air temp sensor, the air-conditioning duct with 3 port valves, different parameters expansion valve and a certain amount of compressor
Oil.
The installation environment, which is one, has vehicle is representative, has wheel bracket and close to rack experimental enviroment
It is carried out under position, and the assembly is connected by pipeline with compressor and condenser, abides by vehicle coordinate position, and connected empty
External blast pipe and air-conditioning assembly air inlet are adjusted, and is sealed in interface, while realizing and sealing in expansion valve entrance, is prevented
Only air is lost.
The blower motor binding post connects the power supply of an adjustable blower voltage, while surveying by voltmeter
Measure the service voltage of air blower binding post；
The compressor is mounted on the particular module of rack, realizes variable revolving speed；
The air inlet of the condenser is connected with the air outlet of condenser rack, while sealing in interface；
The air-conditioner pipe is connected with entire refrigerating circuit；
Each sensor is connected with acquisition equipment.
The pressure sensor pressure source is nitrogen, and the pressure value of each measurement point is recorded during testing, comparison mark
The value of quasi- pressure sensor judges whether each sensor is normal (0 to 15bar etc. divide 15 times measure), simultaneously because low pressure
The range of pressure sensor and the range of high-pressure pressure sensor are different, when system input pressure is greater than 15bar, low pressure sensing
Device disconnects.
The calibration method is to be disposed about a thermocouple in NTC, and two sensors are accessed acquisition equipment simultaneously,
And stand one minute in air (environment temperature is about 24 DEG C of room temperature), and NTC is inserted into ice water with thermocouple simultaneously and is mixed
It closes in object 1 minute, finally takes out.
The TXV parameter measurement is to be placed on TXV temperature sensing package in 0 DEG C of thermostat when measuring 0 DEG C of actuation value, is adjusted
The input pressure of section system adjusts to 1.03MPa toward small from big, records TXV outlet pressure, while if pressure adjusts process
In, pressure is less than 1.03MPa, and test needs to re-start:
(1) when measuring 10 DEG C of actuation values, process is same as above；
(2) after the completion of testing, actuation value of the TXV at 0 DEG C and 10 DEG C is recorded；
TXV type:
(1) cross charge --- what is be filled in temperature sensing package is the mixture of refrigerant and inert gas, is suitable for becoming discharge capacity pressure
Contracting machine；
(2) parallel filling --- what is poured in temperature sensing package is same media, is suitable for fixed displacement and compresses；
Example one:
Adding amount test
Experimental condition:
| Component | Mode |
| Blender door | Quan Leng |
| Mode air door | Blow face |
| Internal-external cycle throttle | Outer circulation |
| Warm wind | Without circulation |
Measurement condition:
Test method:
A, it vacuumizes, pressure maintaining；
B, before compressor start, 250~300g is filled；
C, 25g is filled each time, until obtaining complete charging amount curve.
Example two:
Refrigeration performance test
Experimental condition:
| Component | Mode |
| Blender door | Quan Leng |
| Mode air door | Blow face |
| Internal-external cycle throttle | Outer circulation |
| Warm wind | Without circulation |
Operating condition of test:
Test method:
A, air-conditioning is adjusted to claimed condition, is tested according to different operating conditions；
B, compressor runs two circulations, and each circulation 10min, after the completion of first recycles, compressor is out of service
Then 5min restarts；
C, take the last 3min data of each circulation for calculating.
8) the general operation test of refrigeration cycle
Measurement condition:
Control characteristic outside compressor
Test method:
1, Adjustment Tests equipment is to required operating condition, and stablizes；
2, adjustment PWM makes 3 DEG C of evaporator temperature sensor temperature value and records this PWM value；
3, it using the resulting PWM value of step 2 as peak value, is then adjusted, every 15s variation 1%.
B, system stability is tested --- compressor variable speed
Test method:
1, Adjustment Tests equipment is to required operating condition, and stablizes；
2, to 2000rpm, adjust PWM value makes 3 DEG C of evaporator temperature sensor temperature value and remembers adjustment compressor rotary speed
Record this PWM value；
3,2 gained PWM value of input step, and adjust compressor rotary speed.
C, system stability is tested --- air blower time variant voltage
Test method:
1, Adjustment Tests equipment is to required operating condition, and stablizes；
2, to 5V, adjust PWM value makes 3 DEG C of evaporator temperature sensor temperature value and records this adjustment blower voltage
PWM value；
3,2 gained PWM value of input step, and adjust blower voltage.
9) evaporator icing tests
Measurement condition:
Test method:
1, Adjustment Tests equipment is to required operating condition, and stablizes；
2, compressor rotary speed is adjusted to 3000rpm, adjusts PWM value, make evaporator NTC temperature stablize 1~1.5 DEG C it
Between, record the PWM value；
3,2 gained PWM value of input step, is tested, and duration 30min is tested.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Anyone skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (1)
1. a kind of air-conditioning system refrigeration cycle Bench test methods, comprising the following steps: exemplar prepares, installs, pressure sensor
Calibration, evaporator temperature sensor check, TXV parameter measurement, adding amount test, refrigeration performance test and refrigeration cycle are generally transported
Row test.
It includes air-conditioning assembly with evaporator air inlet leaving air temp sensor, compressor, with entering the wind out that the exemplar, which prepares,
The condenser of air temperature sensor, the air-conditioning duct with 3 port valves, different parameters expansion valve and a certain amount of compressor oil.
The installation environment, which is one, has vehicle is representative, has wheel bracket and close to the position of rack experimental enviroment
Lower progress, and the assembly is connected by pipeline with compressor and condenser, abides by vehicle coordinate position, and connect outside air-conditioning
Portion's blast pipe and air-conditioning assembly air inlet, and be sealed in interface, while realizing and sealing in expansion valve entrance, prevent sky
Air-flow loses.
The blower motor binding post connects the power supply of an adjustable blower voltage, while by voltmeter measurement drum
The service voltage of blower binding post；
The compressor is mounted on the particular module of rack, realizes variable revolving speed；
The air inlet of the condenser is connected with the air outlet of condenser rack, while sealing in interface；
The air-conditioner pipe is connected with entire refrigerating circuit；
Each sensor is connected with acquisition equipment.
The pressure sensor pressure source is nitrogen, and the pressure value of each measurement point, contrast standard pressure are recorded during testing
The value of force snesor judges whether each sensor is normal (0 to 15bar etc. divide 15 times measure), simultaneously because low pressure
The range of sensor and the range of high-pressure pressure sensor are different, and when system input pressure is greater than 15bar, low pressure sensor is disconnected
It opens.
Two sensors are accessed acquisition equipment simultaneously to be disposed about a thermocouple in NTC by the calibration method, and
It stands one minute in air (environment temperature is about 24 DEG C of room temperature), and NTC and thermocouple is inserted into mixture of ice and water simultaneously
In 1 minute, finally take out.
The TXV parameter measurement is to be placed on TXV temperature sensing package in 0 DEG C of thermostat when measuring 0 DEG C of actuation value, adjusts system
The input pressure of system is adjusted toward small to 1.03MPa from big, records TXV outlet pressure, while if pressing during pressure adjustment
Power is less than 1.03MPa, and test needs to re-start:
(1) when measuring 10 DEG C of actuation values, process is same as above；
(2) after the completion of testing, actuation value of the TXV at 0 DEG C and 10 DEG C is recorded；
TXV type:
(1) cross charge --- what is be filled in temperature sensing package is the mixture of refrigerant and inert gas, is suitable for variable compressor；
(2) parallel filling --- what is poured in temperature sensing package is same media, is suitable for fixed displacement compressor.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114312238A (en) * | 2021-12-02 | 2022-04-12 | 武汉格罗夫氢能汽车有限公司 | Air conditioner condenser fan control method based on full pressure change at different vehicle speeds |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114312238A (en) * | 2021-12-02 | 2022-04-12 | 武汉格罗夫氢能汽车有限公司 | Air conditioner condenser fan control method based on full pressure change at different vehicle speeds |
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