CN1281934C - Air-conditioner compressor performance testboard and testing method for vehicle based on PLC - Google Patents
Air-conditioner compressor performance testboard and testing method for vehicle based on PLC Download PDFInfo
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- CN1281934C CN1281934C CN 200410024915 CN200410024915A CN1281934C CN 1281934 C CN1281934 C CN 1281934C CN 200410024915 CN200410024915 CN 200410024915 CN 200410024915 A CN200410024915 A CN 200410024915A CN 1281934 C CN1281934 C CN 1281934C
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- 238000012360 testing method Methods 0.000 title claims abstract description 69
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 26
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 13
- 238000011056 performance test Methods 0.000 claims abstract description 8
- 230000008878 coupling Effects 0.000 claims description 12
- 238000010168 coupling process Methods 0.000 claims description 12
- 238000005859 coupling reaction Methods 0.000 claims description 12
- 230000006835 compression Effects 0.000 claims description 10
- 238000007906 compression Methods 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 9
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 230000008569 process Effects 0.000 claims description 6
- 238000010998 test method Methods 0.000 claims description 5
- 230000008859 change Effects 0.000 claims description 4
- 230000007423 decrease Effects 0.000 claims description 4
- 238000002347 injection Methods 0.000 claims description 4
- 239000007924 injection Substances 0.000 claims description 4
- 238000004378 air conditioning Methods 0.000 claims description 3
- 230000002159 abnormal effect Effects 0.000 abstract description 2
- 230000000007 visual effect Effects 0.000 abstract description 2
- 238000005086 pumping Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 7
- 238000013461 design Methods 0.000 description 5
- 239000007789 gas Substances 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The present invention discloses a performance testing table of an air conditioner compressor for an automobile based on a PLC, and a testing method, which relates to a testing table and a testing method. The testing table comprises a control device, a display device and a work device and integrates a vacuum extractor, an oiling device, a nitrogen filling device, a running device and various performance testing devices; all devices are unitedly controlled by a PLC, and performance tests, such as a vacuum pumping leakage test, a filling efficiency test, a high pressure leakage test and a clutch test, of an air conditioner compressor for an automobile can be automatically completed. The testing state is displayed on line by a display screen and a digital display meter, and audible and visual alarm is carried out under abnormal conditions. The testing table simultaneously provides a manual mode, and all devices are manually controlled via buttons on a panel in the manual mode.
Description
Technical field
The present invention relates to the performance test bed and method of testing of a kind of automobile air conditioner compressor, especially, it is performance test bed and use the method for testing of this test board testing automobile performance of air-conditioning compressor to relate to a kind of automobile air conditioner compressor based on PLC.
Background technology
Automobile air conditioner compressor mostly is oblique tray type compressor or scroll compressor, has clutch coupling and belt pulley usually.The running of compressor realizes by clutch coupling (linking to each other with compressor main shaft) adhesive belt pulley (by driven by motor).Leakage situation, charging efficiency and clutch coupling performance are several Key Quality Indicator of automobile air conditioner compressor, and compressor must carry out strict test to these several performances before dispatching from the factory.The currently used method of testing of automobile air conditioner compressor producer is mainly: keep certain pressure in compressor, put it in the water, see if there is the bubble generation and judge whether gas leakage with this; Make the compressor test working also whether qualified by the load cell test charging efficiency; Set the continuous break-make clutch coupling of certain time interval, observe the clutch operating situation and listen the clutch coupling sound to judge whether clutch coupling is qualified by the tester.Existing these method of testing man's activities are bigger, and degree of accuracy is not high enough, and every test independently carries out, and need artificial transition each other, and test speed can't effectively improve, and often can't satisfy the production demand.
Summary of the invention
The object of the present invention is to provide a kind of automobile air conditioner compressor performance test bed based on PLC.
This purpose is achieved through the following technical solutions, and test board comprises control device, display device and equipment, it is characterized in that, control device comprises PLC, panel button, mode conversion switch; Display device comprises display screen and three digital display meters, and display screen links to each other with PLC, instant playback test process and each equipment current state; Three digital display meters link to each other the rotating speed of instant playback vacuum tightness, pressure and variable-frequency motor respectively with vacuum tightness transmitter, pressure unit, frequency converter; Equipment comprises vacuum extractor, oiling device, notes nitrogen device, rotating device and pick-up unit, and described equipment is by the unified control of PLC; Described vacuum means is changed to vacuum pump; Described oiling device is a filling pump; Described notes nitrogen device is a nitrogen cylinder; Described rotating device comprises motor, belt pulley, belt and frequency converter; Described pick-up unit comprises vacuum tightness transmitter, pressure unit, current transducer and alarm; Described test board also comprises pneumatic stopping valve, two-position three way electric control reversing valve and connecting tube.
The present invention also aims to provide a kind of method of testing with the described test board testing automobile of claim 1 performance of air-conditioning compressor.
This purpose is achieved through the following technical solutions, and this method is divided into following steps:
1) by display screen descend limit and electric current of force value before vacuum tightness standard value, vacuum tightness decline limit, injection flow, the compression, compression back force value, pressure is set and changes limit.
2) compressor inside is evacuated to set vacuum tightness standard value, keeps detecting the vacuum tightness drop-out value after a period of time, qualified if this vacuum tightness drop-out value is considered as less than set vacuum tightness decline limit.
3) give the compressor oiling to set injection flow.
4) in compresser cylinder, annotate nitrogen force value to the set compression.
5) running compressor, the nitrogen in the compression cylinder is shut down to set compression back force value, keeps detected pressures drop-out value after a period of time, if this pressure drop-out value less than set pressure descend limit be considered as qualified.
6) with certain hour at interval continuously the break-make compressor with clutch coupling, if each time between the break-make current of electric changing value greater than set electric current change limit be considered as qualified.
Described step is finished successively automatically by PLC control, if then sound and light alarm of a certain test failure occurs, the test of this compressor is ended automatically.
The present invention can finish the performance test of automobile air conditioner compressor automatically, and the centre need not manual intervention, has shortened the test duration greatly, proving installation degree of accuracy height, and test result is accurately and reliably.Test process is visual, and abnormal conditions are swift in response.Test board is multiple functional, and the integrated level height is simple to operation, and flexible design, and extendability is strong, and the present invention is particularly suitable for the big automobile air conditioner compressor manufacturer of turnout.
Description of drawings
Fig. 1 is the block diagram of system of the present invention;
Fig. 2 is an equipment synoptic diagram of the present invention;
Fig. 3 is a PLC hardware design block diagram of the present invention;
Fig. 4 is PLC control main program flow chart of the present invention.
Embodiment
Elaborate below in conjunction with accompanying drawing.
Fig. 1 has provided the block diagram of system of the present invention.PLC is an automaton, and by carrying out inner automatic control program, the Control work device is tested automatically.PLC and display screen both-way communication: by automatic testing process instant playback on display screen of PLC program decision; By display screen automatic test parameter is set.Panel button is a manual overvide, by response manual operation Control work device.Mode conversion switch decision control model.By the switching of mode conversion switch, with PLC automatically control or the manual control action of panel button in equipment.Equipment comprises variable-frequency motor, vacuum pump, filling pump, pneumatic stopping valve, transmitter etc.The collaborative work under selected control model of these devices is carried out every performance test to compressor.Test data shows by digital display meter.
Fig. 2 has provided equipment synoptic diagram of the present invention.1 is compressor among the figure, has clutch coupling and belt pulley on the compressor; 2 is motor, and 3 is frequency converter, and frequency converter links to each other with motor, and 4 is belt pulley, and 5 is clutch switch, and the driven by motor belt pulley rotates, thereby drives compressor main shaft by clutch coupling adhesive belt pulley, makes compressor operation; 6 is filling pump, and 7 is oil groove, and filling pump keeps often opening in actual motion; 8 is vacuum pump, also keeps often opening; 9 is high-pressure nitrogen bottle; 10 is current transducer, directly links to each other with motor, measures current of electric; 11 is pressure unit, all links to each other with air inlet, gas exhaust piping; 12 is the vacuum tightness transmitter, links to each other with gas exhaust piping; 13-20 is a pneumatic stopping valve, controls the break-make of each pipeline; Air intake opening, exhausr port, the pouring orifice of the corresponding compressor of three pipelines of upper, middle and lower.
Fig. 3 is a PLC hardware design block diagram of the present invention.The input and output of PLC are: 3 digital quantity inputs, from 2 control knobs (beginning, end) and mode conversion switch; 3 analog quantity inputs from pressure unit, vacuum tightness transmitter, current transducer, are 4～20mA current signal respectively.The switch of 13 digital quantity output control 8 pneumatic stopping valves, motor, vacuum pump, filling pump, clutch coupling and alarms; 1 analog quantity is output as the motor speed setting value, and the current signal of 4～20mA outputs to the Frequency Converter Control motor speed.By hardware design as shown in the figure, the PLC program just can be unified control to the running status of all working device, allows their coordination operations, finishes every test.
Fig. 4 has provided the process flow diagram of PLC master routine.Program is at first carried out initialization, promptly according to each variable state zone bit is set when PLC powers up.Initialization is only carried out in first scan period.Then the input signal according to mode conversion switch carries out the pattern judgement, if manual mode is then carried out the manual mode subroutine, all variablees that reset are not carried out any automatic test instruction, and control knob is invalid automatically, the idle running of PLC program.If automatic mode is then carried out the test preparation instruction, wait for that control knob starts test.Press back test beginning automatically at " beginning " control knob.Automatically each step of test is a subroutine, and each step program is called in master routine successively.If every test is all qualified, then finish this test automatically, each device is replied standby condition.If a certain test failure midway, then sound and light alarm, and test is ended at once, keeps current alarm condition, is convenient to the tester and searches reason.Stop to report to the police and finishing this test and must press " end " control knob.
According to shown in Figure 2, by the integration configuration of each equipment and soft, the hardware design of PLC, the present invention finally is achieved as follows the automobile air conditioner compressor auto test flow, and filling pump 6 and vacuum pump 8 keep often opening in test process:
(1) vacuum leak test: drive valve 13,14,20; Testing vacuum tightness when vacuum tightness transmitter 12 is-0.088～-close valve 14 during 0.090MPa; Time-delay 3s final vacuum degree transmitter 12 test vacuum tightness drop-out value:＜0.001MPa are qualified;＞0.001MPa reports to the police; Close valve 13,20.
(2) oiling: drive valve 15, close valve 19; Valve 19 is driven in oiling to 110 ± 10ml, closes valve 15.
(3) annotate nitrogen: drive valve 16,18; When testing pressure for 0.2MPa, pressure unit 11 closes valve 16,18.
(4) charging efficiency and high-pressure leakage test: drive motor 2, drive valve 17, connect clutch switch 5; Cut-off clutch switch 5 when pressure unit 11 is tested pressure and is 0.9MPa; Pressure unit 11 test pressure drop-out value:＜0.06MPa behind the time-delay 3s, qualified＞0.06MPa, report to the police; Close valve 17.
(5) clutch coupling test: drive valve 13; Connect clutch switch 5, keep 0.2s, disconnect 0.2s then, connect 0.2s again, disconnect 0.2s again, repeat altogether 50 times; Current transducer 10 testing of electric motors electric currents change: electric current changing value＞3A between the break-make each time is qualified;＜3A reports to the police; Close valve 13, close motor 2.
The foregoing description is used for the present invention that explains, rather than limits the invention, and in the protection domain of spirit of the present invention and claim, any modification and change to the present invention makes all fall into protection scope of the present invention.
Claims (8)
1, a kind of automobile air conditioner compressor based on PLC is performance test bed, comprises control device, display device and equipment, it is characterized in that, control device comprises PLC, panel button, mode conversion switch;
Display device comprises display screen and three digital display meters, and display screen links to each other with PLC, instant playback test process and each equipment current state; Three digital display meters link to each other the rotating speed of instant playback vacuum tightness, pressure and variable-frequency motor respectively with vacuum tightness transmitter, pressure unit, frequency converter;
Equipment comprises vacuum extractor, oiling device, notes nitrogen device, rotating device and pick-up unit, and described equipment is by the unified control of PLC.
2, test board according to claim 1 is characterized in that, described vacuum means is changed to vacuum pump.
3, test board according to claim 1 is characterized in that, described oiling device is a filling pump.
4, test board according to claim 1 is characterized in that, described notes nitrogen device is a nitrogen cylinder.
5, test board according to claim 1 is characterized in that, described rotating device comprises motor, belt pulley, belt and frequency converter.
6, test board according to claim 1 is characterized in that, described pick-up unit comprises vacuum tightness transmitter, pressure unit, current transducer and alarm.
7, test board according to claim 1 is characterized in that, described test board also comprises pneumatic stopping valve, two-position three way electric control reversing valve and connecting tube.
8, a kind of method of testing with the described test board testing automobile of claim 1 performance of air-conditioning compressor is characterized in that, is divided into following steps:
1) by display screen descend limit and electric current of force value before vacuum tightness standard value, vacuum tightness decline limit, injection flow, the compression, compression back force value, pressure is set and changes limit;
2) compressor inside is evacuated to set vacuum tightness standard value, keeps detecting the vacuum tightness drop-out value after a period of time, qualified if this vacuum tightness drop-out value is considered as less than set vacuum tightness decline limit;
3) give the compressor oiling to set injection flow;
4) in compresser cylinder, annotate nitrogen force value to the set compression;
5) running compressor, the nitrogen in the compression cylinder is shut down to set compression back force value, keeps detected pressures drop-out value after a period of time, if this pressure drop-out value less than set pressure descend limit be considered as qualified;
6) with certain hour at interval continuously the break-make compressor with clutch coupling, if each time between the break-make current of electric changing value greater than set electric current change limit be considered as qualified;
Described step is finished successively automatically by PLC control, if then sound and light alarm of a certain test failure occurs, the test of this compressor is ended automatically.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410024915 CN1281934C (en) | 2004-06-01 | 2004-06-01 | Air-conditioner compressor performance testboard and testing method for vehicle based on PLC |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410024915 CN1281934C (en) | 2004-06-01 | 2004-06-01 | Air-conditioner compressor performance testboard and testing method for vehicle based on PLC |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1584541A CN1584541A (en) | 2005-02-23 |
| CN1281934C true CN1281934C (en) | 2006-10-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200410024915 Expired - Fee Related CN1281934C (en) | 2004-06-01 | 2004-06-01 | Air-conditioner compressor performance testboard and testing method for vehicle based on PLC |
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Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102778639B (en) * | 2012-06-30 | 2014-05-28 | Tcl瑞智（惠州）制冷设备有限公司 | Dynamic testing method for stator and rotor of compressor |
| CN103291598A (en) * | 2013-05-07 | 2013-09-11 | 福州聚升汽车销售服务有限公司 | Multifunctional auto air conditioning compressor testing platform |
| CN104765279B (en) * | 2014-01-07 | 2019-02-19 | 基伊埃冷冻技术（苏州）有限公司 | Industrial refrigeration unit emulation test system and the test method for applying it |
| CN105182233B (en) * | 2015-08-17 | 2019-01-18 | 安徽江淮松芝空调有限公司 | Air conditioning for automobiles assembly motor detection system |
| CN105334045B (en) * | 2015-12-14 | 2017-11-14 | 金陵科技学院 | A kind of gas cold-hot impact test system and its control method based on PLC |
| CN106569064B (en) * | 2016-10-27 | 2019-02-26 | 重庆承亿机电设备有限公司 | Frequency converter and its frequency Setting signal fault detection method |
| CN107654362A (en) * | 2017-11-10 | 2018-02-02 | 福建雪人股份有限公司 | A kind of compressor test device and method of testing |
| CN117092568A (en) * | 2018-01-19 | 2023-11-21 | 北京绪水互联科技有限公司 | Method for monitoring cold head efficiency |
| CN109185114A (en) * | 2018-08-28 | 2019-01-11 | 瑞田汽车压缩机（江苏）有限公司 | A kind of vehicle compressor running-in testing method |
| CN109708609B (en) * | 2019-01-29 | 2024-03-29 | 浙江春晖空调压缩机有限公司 | Device and method for detecting internal deformation and stress of compressor |
| CN111677664B (en) * | 2020-06-30 | 2024-02-23 | 杭州兴鑫科技有限公司 | Performance test bench for screw compressor |
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- 2004-06-01 CN CN 200410024915 patent/CN1281934C/en not_active Expired - Fee Related
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| CN1584541A (en) | 2005-02-23 |
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Granted publication date: 20061025 |