CN103674587B - Air-conditioning system detection experiment system and test method - Google Patents
Air-conditioning system detection experiment system and test method Download PDFInfo
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- CN103674587B CN103674587B CN201210339609.2A CN201210339609A CN103674587B CN 103674587 B CN103674587 B CN 103674587B CN 201210339609 A CN201210339609 A CN 201210339609A CN 103674587 B CN103674587 B CN 103674587B
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Abstract
The present invention relates to a kind of air-conditioning system detection experiment system and test method, comprise tested air-conditioning system, pressure dwelling loop, vacuumize loop, refrigerant charging reclaims loop and control module, described pressure dwelling loop, vacuumize loop and refrigerant charging and reclaim the loop low-voltage tube interface by connecting pipe and described tested air-conditioning system parallel with one another and high-voltage tube interface is connected respectively, described each loop is all serially connected with the solenoid valve for control loop break-make, and each described solenoid valve is connected with described control module.The present invention by the pressurize of air-conditioning system, vacuumize, reclaim, the function such as charging refrigerant in one, equipment is simplified, easy to operate, realizes Automatic Control, improves air-conditioning system pressurize, vacuumizes, refrigerant-recovery, fills the accuracy detecting data.<!--1-->
Description
Technical field
The present invention relates to a kind of air-conditioning system, particularly a kind of be directed to pressurize carried out to the air-conditioning system of various rail vehicle, vacuumize, refrigerant-recovery and filled air-conditioning system detection experiment system and test method.
Background technology
The pressurize of motor train unit air-conditioning system, vacuumize, charging refrigerant ensures air-conditioning equipment safety, the normal key run, motor train unit air-conditioning system dwell pressure value, the vacuum tightness vacuumized are the keys ensureing motor train unit air-conditioning system regular event.
After the railway vehicle air conditioner systems such as current motor train unit (comprising air-conditioner set and pipeline) install, carry out system pressurize, vacuumize, remaining refrigerant-recovery, new refrigerant fill process, to ensure that system pipeline effective sealing is not revealed and internal refrigeration storage agent is cleaned.
Present motor train unit air-conditioning system pressurize, vacuumize, refrigerant-recovery, fill process all separately carry out.During system pipeline pressurize, nitrogen cylinder, tensimeter are communicated with system pipeline with connecting pipe, after nitrogen pressure reaches requirement, manual-lock nitrogen meter valve, initiation pressure detects.And hand filling record sheet, after pressurize completes, lay down nitrogen cylinder, then adapter is received on vacuum pump, pipeline is vacuumized, after reaching vacuum tightness, close vacuum pump, keep vacuum tightness in the stipulated time, and hand-kept vacuum tightness.After completion, refrigerant charging is carried out to air-conditioning system, measure charging amount with electronic scale, manually stop after reaching requirement filling.
Above-mentioned pressurize, vacuumize, there is following problem in the technology such as to fill: one is that use equipment is many, need nitrogen cylinder, vacuum pumping pump and pressure meter device, refrigerant charging, recycling can, electronic scale etc., system is carried out pressurize, vacuumized, refrigerant agent reclaims, equipment conveying is cumbersome when filling; Two are system pressurizes, vacuumize, refrigerant-recovery, fill and can not disposablely complete, the emptying nitrogen of intermediate demand, disassembling fixture, mounting tool multi-pass operations, three is test parameters (as dwell pressure and time, evacuated pressure and time, refrigerant charges etc.), need manual control, data human factor is large, and precision is low.
Summary of the invention
Fundamental purpose of the present invention is to solve the problem and not enough, provides a kind of equipment to simplify, the air-conditioning system detection experiment system that easy to operate, accuracy of detection is high and test method.
For achieving the above object, technical scheme of the present invention is:
A kind of air-conditioning system detection experiment system, comprise tested air-conditioning system, pressure dwelling loop, vacuumize loop, refrigerant charging reclaims loop and control module, described pressure dwelling loop, vacuumize loop and refrigerant charging and reclaim the loop low-voltage tube interface by connecting pipe and described tested air-conditioning system parallel with one another and high-voltage tube interface is connected respectively, described each loop is all serially connected with the solenoid valve for control loop break-make, and each described solenoid valve is connected with described control module.
Further, described pressure dwelling loop comprises nitrogen cylinder, described nitrogen cylinder is connected with described connecting pipe by pressurize pipeline, and the pressurize solenoid valve for pilot piping break-make is serially connected in described pressurize pipeline, the pipeline that described connecting pipe connects also branches out one for emptying pressurize bleeder pipe.
Further, described in vacuumize loop and comprise vacuum pump, described vacuum pump is connected with described connecting pipe by vacuum line, and the vacuum solenoid for pilot piping break-make is serially connected in described vacuum line.
Further, described refrigerant charging reclaim loop comprise for condensating refrigerant condensing circuit, gas refrigerant fills pipeline, liquid refrigerant fills pipeline, reclaim line, for storing filled bottle and the returnable bottle of cold-producing medium, described gas refrigerant is filled pipeline and is all connected with described connecting pipe by described condensing circuit with described reclaim line again, described liquid refrigerant fills pipeline and is directly connected with described connecting pipe, fills pipeline, liquid refrigerant fills pipeline, reclaim line is serially connected with solenoid valve for pilot piping break-make at described gas refrigerant.
Further, described condensing circuit comprises the compressor, oil separator, condenser and the four-way change-over valve that are connected successively by pipeline.
Further, in described condensing circuit, filtrator is serially connected with.
Further, described filled bottle and returnable bottle are connected to the electronic scales for weighing.
Further, described filled bottle and returnable bottle are connected to for emptying evacuated tube.
Further, described pressure dwelling loop, vacuumize loop, refrigerant charging reclaims loop and control module and is integrated in a casing, described connecting pipe, pressurize pipeline are provided with connecting interface on described casing.
Another technical scheme of the present invention is:
A test method for air-conditioning system detection experiment system, comprising:
The step of system pipeline pressurize, control nitrogen cylinder is filled with nitrogen, when pipeline inner pressure meets the demands to the pipeline of tested air-conditioning system, closing pipe line makes pipeline enter packing state, the dwell time is controlled by control module, after the dwell time reaches requirement, the nitrogen in discharge pipe;
The step that system pipeline vacuumizes, starts vacuum pump and vacuumizes pipeline, after vacuum tightness reaches requirement in pipeline, closes vacuum pump, and makes tested air-conditioning system pipeline enter vacuum tightness hold mode;
The step of refrigerant-recovery, utilizes condensing circuit that the cold-producing medium in tested air-conditioning system is all condensed into liquid state, then by refrigerant-recovery in returnable bottle, is controlled the recovery time of cold-producing medium by the weight change controlling returnable bottle;
The step of refrigerant charging, by the refrigerant charging in filled bottle in the pipeline of tested air-conditioning system, point liquid refrigerant fills and gas refrigerant fills two stages, by controlling the Weight control refrigerant charge of filled bottle;
By the step of the evacuate air in returnable bottle and filled bottle;
To the step of test figure real time record, output pressure curve, printing test figure.
To sum up content, air-conditioning system detection experiment system of the present invention and test method, by the pressurize of air-conditioning system, vacuumize, reclaim, the functions such as charging refrigerant are in one, by each action of solenoid valve open and close controlling, complete the pressurize of motor train unit air-conditioning system, vacuumize, refrigerant-recovery, fill and detect the full automatic working of each function, equipment is simplified, easy to operate, by control module to air-conditioning system pressurize, evacuated pressure and time, to refrigerant-recovery, charging amount carries out controlling and detecting, improve air-conditioning system pressurize, vacuumize, refrigerant-recovery, fill the accuracy detecting data.
Accompanying drawing explanation
Fig. 1 is fundamental diagram of the present invention;
Fig. 2 is test platform structure schematic diagram of the present invention;
Fig. 3 is the A direction view of Fig. 2.
As shown in Figure 1 to Figure 3, tested air-conditioning system 1, pilot system 2, low-voltage tube interface 3, high-voltage tube interface 4, low-pressure connection tube 5, high-pressure connecting pipe 6, nitrogen cylinder 7, pressurize pipeline 8, pressurize bleeder pipe 9, vacuum pump 10, vacuum line 11, total connecting pipe 12, fill bottle 13, liquid refrigerant fills pipeline 14, gas refrigerant fills pipeline 15, compressor 16, oil separator 17, filtrator 18, pressure controller 19, fill evacuated tube 20, scavenge pipe 21, safety valve 22, returnable bottle 23, reclaim line 24, condenser 25, condensation fan 26, reclaim evacuated tube 28, safety valve 29, display 30, fill bottle electronic scales panel 31, returnable bottle electronic scales panel 32, casing 33, movable pulley 34, handle 35, electronic scales 36, electronic scales 37, liquid-sighting glass 38, kapillary 39, four-way change-over valve 40, gauge tap 41.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the present invention is described in further detail:
As shown in Figure 1, a kind of air-conditioning system detection experiment system, comprises tested air-conditioning system 1 and pilot system 2, and pilot system 2 comprises pressure dwelling loop, vacuumizes loop, refrigerant charging reclaims loop and control module.Pressure dwelling loop, vacuumize loop, refrigerant charging reclaims loop connection parallel with one another, the pressurize of respective complete independently system, vacuumize, refrigerant charging and refrigerant-recovery, the steps such as the cleaning of system pipeline.
Wherein, tested air-conditioning system 1 has low-voltage tube interface 3 and high-voltage tube interface 4, and pilot system 2 is connected with low-voltage tube interface 3 and high-voltage tube interface 4 with high-pressure connecting pipe 6 respectively by low-pressure connection tube 5.
Low-pressure connection tube 5 is connected in series one for controlling the solenoid valve DF4A of low-pressure connection tube 5 break-make and the pressure transducer B1 for signal piping pressure, high-pressure connecting pipe 6 is connected in series one for the kapillary 39 of cold-producing medium throttling and the pressure transducer B2 of signal piping pressure, low-pressure connection tube 5 with converge into total connecting pipe 12 after high-pressure connecting pipe 6 parallel connection and be connected with the pipeline in other loop, total connecting pipe 12 is connected in series one and controls the electrical ball valve DF3 of break-make and the stop valve JF2 for manually disconnecting, this hand stop valve JF2 can manually by low-pressure connection tube 5 when needs, high-pressure connecting pipe 6 disconnects with each loop below.Electrical ball valve DF3, solenoid valve DF4A, pressure transducer B1, pressure transducer B2 are all connected with control module.Four retaining valves DXF1, DXF2, DXF3, DXF4 are provided with, to limit the flow direction of gas or liquid in pipeline in intersection between low-pressure connection tube 5 and high-pressure connecting pipe 6.
Pressure dwelling loop comprises nitrogen cylinder 7, total connecting pipe 12 that nitrogen cylinder 7 is converged into by pressurize pipeline 8 and low-pressure connection tube 5 and high-pressure connecting pipe 6 is connected, on pressurize pipeline 8, serial connection is used for pressurize solenoid valve DF1, the pressure transducer B7 for detected pressures, the retaining valve DXF5 of pilot piping break-make, and pressurize solenoid valve DF1, pressure transducer B7 are connected with control module.
Total connecting pipe 12 that pressurize pipeline 8 is connected with between low-pressure connection tube 5 and high-pressure connecting pipe 6 also branches out a pressurize bleeder pipe 9, the port of pressurize bleeder pipe 9 is provided with pressure-releasing electromagnetic valve DF10, and pressure-releasing electromagnetic valve DF10 is communicated with air and is connected with control module.After pressurize terminates, pressure-releasing electromagnetic valve DF10 opens, nitrogen in tested air-conditioning system 1 pipeline is all disposed in air, a retaining valve DXF7 is connected in series again in the porch of pressure-releasing electromagnetic valve DF10, retaining valve DXF7 is to pressure-releasing electromagnetic valve DF10 direction conducting, extraneous air can be avoided to enter in tested air-conditioning system 1 by pressure-releasing electromagnetic valve DF10 and pipeline, to ensure accuracy of detection, pressurize bleeder pipe 9 arranges a hand stop valve JF3 again.
Vacuumize loop and comprise vacuum pump 10, total connecting pipe 12 that vacuum pump 10 is converged into by vacuum line 11 and low-pressure connection tube 5 and high-pressure connecting pipe 6 is connected, vacuum line 11 is connected in parallel on total connecting pipe 12 with pressurize pipeline 8 and pressurize bleeder pipe 9, vacuum solenoid DF2 for controlling vacuum line 11 break-make is serially connected in vacuum line 11, the porch that vacuum line 11 is positioned at vacuum solenoid DF2 is connected in series a retaining valve DXF6, retaining valve DXF6 is to vacuum pump 10 direction conducting, extraneous air can be avoided to enter in tested air-conditioning system 1 by vacuum pump 10 and pipeline, to ensure the vacuum tightness of system.Vacuum pump 10, vacuum solenoid DF2 are connected with control module.
Refrigerant charging reclaims loop and comprises filled bottle 13 for storing cold-producing medium and returnable bottle 23, because fill the mainly liquid refrigerant that bottle 13 and returnable bottle 23 deposit, so refrigerant charging and removal process are mainly carried out filling of liquid refrigerant and reclaimed.In automatic filling process, system default is that liquid refrigerant fills, when liquid fill quantity not sufficient in filled bottle 13, when not meeting tested air-conditioning system 1 charging amount requirement, automatically the filled process of pressure equalization process and gas refrigerant is entered, till charging amount meets testing requirements.So, refrigerant charging recovery loop also comprises the condensing circuit for condensed gas cold-producing medium, gas refrigerant is filled pipeline 15 and is all connected with total connecting pipe 12 by condensing circuit with reclaim line 24, liquid refrigerant fills pipeline 14 and is directly connected with total connecting pipe 12, and gas refrigerant fills pipeline 15, reclaim line 24, liquid refrigerant fill connection parallel with one another between pipeline 14.
The two ends that liquid refrigerant fills pipeline 14 connect filled bottle 13 and total connecting pipe 12 respectively, fill on pipeline 14 be serially connected with one for controlling liquid fill solenoid valve DF5, the retaining valve DXF8 of break-make at liquid refrigerant.
One end that gas refrigerant fills pipeline 15 connects condensing circuit, and the other end connects and fills bottle 13, fills the gas charge solenoid valve DF6, retaining valve DXF9, the pressure transducer B5 that pipeline 15 are serially connected with for controlling break-make at gas refrigerant.
One end of reclaim line 24 connects condensing circuit, and the other end connects returnable bottle 23, and reclaim line 24 is serially connected with recovery solenoid valve DF4B, retaining valve DXF12, the pressure transducer B6 for controlling break-make.
Condensing circuit comprises the compressor 16, oil separator 17, condenser 25 and the four-way change-over valve 40 that are connected successively by pipeline, and at condenser 25, place arranges condensation fan 26.The outlet of compressor 16 connects oil separator 17, oil separator 17 is for separating of the compressor oil in refrigerant gas, each cut-in pressure sensor B3 and B4 in the two ends pipeline of compressor 16, for detecting air inlet and the discharge pressure of compressor 16, compressor 16 also accesses compressor pressure controller 19, be connected to solenoid valve DF9 between the air inlet of compressor 16 and exhaust, between the outlet and compressor 16 of oil separator 17, be provided with scavenge pipe 21, scavenge pipe 21 is provided with solenoid valve DF13.The port one of four-way change-over valve 40 is connected with total connecting pipe 12, the port 2 of four-way change-over valve 40 is connected with the air intake opening of compressor 16, port 3 points of two-way of four-way change-over valve 40 are connected with reclaim line 24 and gas filler line road 15 respectively, and the port 4 of four-way change-over valve 40 is connected with the outlet of condenser 25.
The pipeline connected between condenser 25 and four-way change-over valve 40 arranging a filtrator 18, for filtering cold-producing medium, the two ends of filtrator 18 being provided with hand stop valve JF5 and JF4, for hand off pipeline, so that periodic replacement filtrator 18.
Condensing circuit and liquid refrigerant are filled between pipeline 14 and are connected by two solenoid valve DF7A and DF7B and two retaining valve DXF10 and DXF11, for controlling refrigerant flow direction when filling and reclaim.
Fill on pipeline that pipeline 14 is connected at total connecting pipe 12 and condensing circuit and liquid refrigerant and be serially connected with liquid-sighting glass 38, electrical ball valve DF8 and stop valve JF1.The effect of liquid-sighting glass 38 is when cold-producing medium carries out filling and reclaiming, and can observe the filled state of cold-producing medium intuitively.
Fill bottle 13 and connect a filled evacuated tube 20, the end filling evacuated tube 20 meets filled emptying solenoid valve DF11, and filled evacuated tube 20 is serially connected with stop valve JF6.Fill emptying solenoid valve DF11 to open, the refrigerant gas remained in pipeline after filled end is disposed in air.
Returnable bottle 23 is connected with for emptying recovery evacuated tube 28, be disposed in air by reclaiming the refrigerant gas remained in pipeline after terminating, the end of reclaiming evacuated tube 28 takes back receives emptying solenoid valve DF12, and recovery evacuated tube 28 is serially connected with stop valve JF8.
For warranty test safety, filled bottle 13 is provided with a safety valve 22, returnable bottle 23 is provided with a safety valve 29.Fill bottle 13 to be connected with electronic scales 36, weighed by electronic scales 36, and then control charging amount.Returnable bottle 23 is connected with electronic scales 37, is weighed by electronic scales 37, and then controls yield.Electronic scales 36 is all connected with control module with electronic scales 37.
Control module comprises industrial computer and controller, and control module is according to testing the switch of each solenoid valve needed in control test system 2, the Stress control of each process and time etc.Industrial computer comprises display 30, printer etc., display 30 has operation interface, test condition can be set for operating personnel, in addition, by the line pressure real time record of tested air-conditioning system 1, and relevant pressure curve is shown over the display, data analysis is carried out for operating personnel, after having tested, the pressurize of tested air-conditioning system 1 pipeline, evacuated pressure curve can be recalled at any time, output and the printing of data can be carried out simultaneously as requested.
When carrying out system pipeline pressurize, dwell time, pressurize desired value maximal value, minimum value, pressure surge value, data acquisition intervals time etc. can be set by operation interface.In pressure maintaining period, in each data acquisition moment, when pressure change exceedes regulation undulating quantity, automatic alarm module meeting automatic alarm in control module, automatic alarm can by audible alarms such as hummers, also can display alarm information on the display 30, the mode can also glimmered by signal lamp is reported to the police.
When carrying out system and vacuumizing, vacuum tightness desired value maximal value and minimum value, vacuum tightness retention time, fluctuation vacuum value, data collection interval etc. can be set by operation interface.In vacuum test process, in each data acquisition moment, when vacuum tightness change exceedes regulation undulating quantity, automatic alarm, supervises staff's find problem and repairs.Vacuum tightness unit can switch between Microns, PSI, InHg, mBar, PascaIs, Torr, mTorr.
Comprise filled bottle electronic scales panel 31 to be in a control unit connected with 37 with two electronic scaless 36 respectively with returnable bottle electronic scales panel 32, for intuitively showing the weight of filled bottle 13 and returnable bottle 23.
As shown in Figures 2 and 3, for the ease of operation, in the present embodiment, be arranged in a casing 33 by all integrated for equipment all in pilot system 2, the connecting interface of low-pressure connection tube 5, high-pressure connecting pipe 6, pressurize pipeline 8 is provided with, for being connected with tested air-conditioning system 1 and nitrogen cylinder 7 in the side of casing 33.Display 30, filled bottle electronic scales panel 31, returnable bottle electronic scales panel 32, gauge tap 41, various hand stop valves etc. are all arranged on the table top of casing 33, for operating personnel's operation and direct vision.
The bottom of casing 33 is provided with movable pulley 34, and be provided with the handle 35 promoting casing 33 in the side of casing 33, pilot system 2 can be pushed into suitable testing position arbitrarily as required by operating personnel.In order to easy to operate, in the present embodiment, the pipeline be connected with tested air-conditioning system 1, nitrogen cylinder 7, returnable bottle 23, filled bottle 13 is all adopted flexible pipe.
As shown in Figure 1, process of the test is described below in detail.
One, system pipeline pressure holding step:
Pressurize solenoid valve DF1 and electrical ball valve DF3 is opened by control module, nitrogen in nitrogen cylinder 7 is successively by retaining valve DXF5, solenoid valve DF1, electrical ball valve DF3 and stop valve JF2, leading up to retaining valve DXF1, low-pressure connection tube 5 and low-voltage tube interface 3 enters tested air-conditioning system 1, meanwhile, separately leading up to retaining valve DXF2, kapillary 39, high-pressure connecting pipe 6 and high-voltage tube interface 4 enters tested air-conditioning system 1.
Pressure in pressure transducer B1, pressure transducer B2 and pressure transducer B7 signal piping to control module feedback signal, when reaching testing requirements, control module controls pressurize solenoid valve DF1, electrical ball valve DF3 closes, system starts to enter packing state.Have the time relay in control module, the time relay starts timing, controls the dwell time.When control module confirms that the dwell time reaches testing requirements, control module sends signal, control electrical ball valve DF3, pressure-releasing electromagnetic valve DF10 again, low-voltage solenoid valve DF4A opens, under the restriction of retaining valve DXF1 and retaining valve DXF2, the nitrogen in tested air-conditioning system 1 is discharged by low-voltage tube interface 3, low-pressure connection tube 5, retaining valve DXF3, low-voltage solenoid valve DF4A, stop valve JF2, electrical ball valve DF3, stop valve JF3, retaining valve DXF7 and pressure-releasing electromagnetic valve DF10.This process need closes the solenoid valve in other loop.When tested air-conditioning system 1 Pressure Drop is to atmospheric pressure state, pressurize completes, and system enters next work step automatically.
When carrying out system pipeline pressurize, dwell time, pressurize desired value maximal value, minimum value, pressure surge value, data acquisition intervals time etc. can be set by operation interface.In pressure maintaining period, in each data acquisition moment, pressure transducer B7 is at any time to control module feedback data information, whether the pressurize of control module automated decision system is qualified, when pressure change exceedes regulation undulating quantity, namely, when sealing detection is defective, the automatic alarm module meeting automatic alarm in control module, reminds operator search leakage point and repair.
By industrial computer by the pressure real time record in tested air-conditioning system 1 pipeline, and draw out dwell pressure curve, pressure curve is shown by display 30.After pressurize has been tested, tested air-conditioning system 1 pipeline dwell pressure curve can be recalled at any time by industrial computer, can related data printing be carried out simultaneously.
Two, system pipeline vacuum step:
When system pipeline vacuumizes, do not need to change any frock, industrial computer automatically switches to system underpressure pattern.In vacuum test process, vacuum solenoid DF2, electrical ball valve DF3, low-voltage solenoid valve DF4A open unlatching, start vacuum pump 10 simultaneously.Air in tested air-conditioning system 1 enters vacuum pump 10 by low-voltage tube interface 3, low-pressure connection tube 5, retaining valve DXF3, low-voltage solenoid valve DF4A, stop valve JF2, electrical ball valve DF3, vacuum solenoid DF2, retaining valve DXF6.
Vacuum pump 10 runs to the stipulated time, and the air pressure in pressure transducer B1 and pressure transducer B2 signal piping, after in pipeline, vacuum tightness reaches presetting requirement, vacuum pump 10 is out of service.Vacuum solenoid DF2, electrical ball valve DF3, low-voltage solenoid valve DF4A close, and enter vacuum tightness hold mode.This process need closes the solenoid valve in other loop.
After having vacuumized, system has entered next work step automatically.
When system vacuumizes, vacuum tightness desired value maximal value and minimum value, vacuum tightness retention time, fluctuation vacuum value, data collection interval etc. can be set by operation interface.In vacuum test process, in each data acquisition moment, pressure transducer B1 and pressure transducer B2 is at any time to control module feedback data information, whether control module automated decision system vacuum tightness is qualified, when vacuum tightness change exceedes regulation undulating quantity, automatic alarm module meeting automatic alarm in control module, supervises staff's find problem and repairs.
Vacuum tightness unit can switch between Microns, PSI, InHg, mBar, PascaIs, Torr, mTorr.
By industrial computer by the pressure real time record in tested air-conditioning system 1 pipeline, and draw out evacuated pressure curve, pressure curve is shown by display 30.Vacuumize after test completes, tested air-conditioning system 1 pipeline evacuated pressure curve can be recalled at any time by industrial computer, can related data printing be carried out simultaneously.
Three, refrigerant charging step:
Possess and manually fill and automatic filling two kinds of functions.When manually filling, the electronic scales 36 filling bottle 13 connects LCD display, and operator looks into filled bottle 13 weight LCD display by sight and controls refrigerant charge.During automatic filling, system pressure equilibration time before refrigerant type and filled weight and gas charge can be set by operation interface, and observe charging amount by filling bottle electronic scales panel 31.
Automatic filling process comprises liquid fill and two stages of gas charge; when liquid fill amount does not meet charging amount requirement; automatically enter pressure equalization process and gas charge process, auto stop when filled weight reaches requirement, operation interface shows " completing " prompting.
In liquid fill process, liquid fill solenoid valve DF5, electrical ball valve DF8, electrical ball valve DF3 opens, because now tested air-conditioning system 1 pipeline is in vacuum state, fill the pressure of the pressure in bottle 13 higher than tested air-conditioning system 1 pipeline, the liquid refrigerant filled in bottle 13 passes through liquid fill solenoid valve DF5 automatically successively, retaining valve DXF8, liquid-sighting glass 38, electrical ball valve DF8, stop valve JF1, electrical ball valve DF3, stop valve JF2, lead up to retaining valve DXF1 again, low-pressure connection tube 5 and low-voltage tube interface 3 enter tested air-conditioning system 1, simultaneously, separately lead up to retaining valve DXF2, kapillary 39, high-pressure connecting pipe 6 and high-voltage tube interface 4 enter tested air-conditioning system 1, complete filling of liquid refrigerant.
After filled a period of time, the pressure filled in bottle 13 reduces, and is in equilibrium state with the pressure in tested air-conditioning system 1 pipeline, and the liquid refrigerant filled in bottle 13 can evaporate and become gaseous refrigerant, now, starts gas charge process.
In gas charge process, compressor 16, condensation fan 26 work, and solenoid valve DF7A, gas charge solenoid valve DF6, electrical ball valve DF8, electrical ball valve DF3 open.Gas refrigerant is successively by gas charge solenoid valve DF6, retaining valve DXF9 enters the STF3 mouth of four-way change-over valve 40, now four-way change-over valve 40 obtains electric, gas refrigerant is flowed out by the STF2 mouth of four-way change-over valve 40 and enters compressor 16, gas refrigerant is compressed into the state of High Temperature High Pressure, condenser 25 is entered again by oil separator 17, gas refrigerant is condensed into liquid refrigerant in condenser 25, liquid refrigerant is through filtrator 18, enter the STF4 mouth of four-way change-over valve 40 again, flow out from the STF1 mouth of four-way change-over valve 40, through solenoid valve DF7A, retaining valve DXF10, liquid-sighting glass 38, electrical ball valve DF8, stop valve JF1, electrical ball valve DF3, stop valve JF2, lead up to retaining valve DXF1 again, low-pressure connection tube 5 and low-voltage tube interface 3 enter tested air-conditioning system 1, simultaneously, separately lead up to retaining valve DXF2, kapillary 39, high-pressure connecting pipe 6 and high-voltage tube interface 4 enter tested air-conditioning system 1, complete filling of gas refrigerant, until fill weight to reach requirement.
Four, refrigerant-recovery step:
Refrigerant type is selected by operation interface.
In refrigerant-recovery process, compressor 16, condensation fan 26 work, and low-voltage solenoid valve DF4A, electrical ball valve DF3, electrical ball valve DF8, solenoid valve DF7B, recovery solenoid valve DF4B open.Now, pressure in returnable bottle 23 is lower than the pressure in tested air-conditioning system 1, cold-producing medium in tested air-conditioning system 1 is successively by low-voltage tube interface 3, low-pressure connection tube 5, retaining valve DXF3, low-voltage solenoid valve DF4A, stop valve JF2, electrical ball valve DF3, stop valve JF1, electrical ball valve DF8, liquid-sighting glass 38, solenoid valve DF7B, retaining valve DXF11 enters the STF1 mouth of four-way change-over valve 40, now four-way change-over valve 40 dead electricity, cold-producing medium is flowed out by the STF2 mouth of four-way change-over valve 40, enter compressor 16, gas refrigerant is compressed into the state of High Temperature High Pressure, condenser 25 is entered again by oil separator 17, gas refrigerant is condensed into liquid refrigerant in condenser 25, liquid refrigerant is through filtrator 18, enter the STF4 mouth of four-way change-over valve 40 again, flow out from the STF3 mouth of four-way change-over valve 40, through retaining valve DXF12, reclaim solenoid valve DF4B to be recycled in returnable bottle 23.
The weight of returnable bottle 23 is weighed by electronic scales 37, and observes yield by returnable bottle electronic scales panel 32.Think that when the weight of returnable bottle 23 does not change for 4 minutes recovery is complete, or when the weight of returnable bottle 23 reaches 80% of maximum weight, stop reclaiming, control desk has alarm.
Five, by the step of the evacuate air in filled bottle:
Open filled emptying solenoid valve DF11, stop valve JF6, by emptying for the not solidifying refrigerant gas in filled bottle 13.
Six, by the step of the evacuate air in returnable bottle:
Open and reclaim emptying solenoid valve DF12 and stop valve JF8, by emptying for the not solidifying refrigerant gas in returnable bottle 23.
Seven, the cleaning step of pipeline in pilot system:
1) Controlling solenoid valve DF7A, solenoid valve DF7B, electrical ball valve DF8, solenoid valve DF9, pressure-releasing electromagnetic valve 10 are opened, and are fallen by the discharge refrigerant in pipeline.
2) control vacuum solenoid DF2, solenoid valve DF7A, solenoid valve DF7B, electrical ball valve DF8, solenoid valve DF9 open, and start vacuum pump 10 simultaneously, vacuumize pipeline.
3) again electrical ball valve DF8 is closed, continue to open vacuum solenoid DF2, proceed to vacuumize to pipeline.
4) control liquid fill solenoid valve DF5, gas charge solenoid valve DF6, solenoid valve DF9, solenoid valve DF7A, solenoid valve DF7B open, charging refrigerant in pipeline.
5) then repeat above-mentioned discharge refrigerant and pipeline vacuum step, then second time is to charging refrigerant in pipeline, cleans pipeline with this.
Air-conditioning system detection experiment system described in the present embodiment and test method, compared with prior art, tool has the following advantages:
(1) equipment is simplified, only need to use refrigeration system Detecting data can complete motor train unit air-conditioning system pressurize, vacuumize, refrigerant-recovery, fill and detect, transport more convenient.
(2) easy to operate, only need to connect flexible pipe before before Dynamic System, centre does not need any frock of dismounting, once can complete air-conditioning system pressurize, vacuumize, refrigerant-recovery, fill function.
(3) equipment runs and is controlled by computer program, avoids manually producing maloperation, and pressure is detected by sensor simultaneously, digital instrumentation display data, more accurate than manual observation tensimeter.
(4) Output rusults is more concrete in detail, not only output pressure change, and can the real-time curve of output pressure, facilitate post analysis, and experimental data artificially can not be revised, ensure that the authenticity of experimental data, reduce the human factor of test simultaneously.
As mentioned above, plan content given in conjunction with the accompanying drawings and embodiments, can derive similar technical scheme.In every case be the content not departing from technical solution of the present invention, any simple modification done above embodiment according to technical spirit of the present invention, equivalent variations and modification, all still belong in the scope of technical solution of the present invention.
Claims (9)
1. an air-conditioning system detection experiment system, is characterized in that: comprise tested air-conditioning system, pressure dwelling loop, vacuumize loop, refrigerant charging reclaims loop and control module, described pressure dwelling loop, vacuumize loop, refrigerant charging reclaims loop and control module is integrated in a casing, described pressure dwelling loop, vacuumize loop and refrigerant charging and reclaim the loop low-voltage tube interface by connecting pipe and described tested air-conditioning system parallel with one another and high-voltage tube interface is connected, respectively at described pressure dwelling loop, vacuumize loop and refrigerant charging and reclaim solenoid valve loop is all serially connected with for control loop break-make, each described solenoid valve is connected with described control module, and described refrigerant charging recovery loop comprises the condensing circuit for condensating refrigerant, gas refrigerant fills pipeline, liquid refrigerant fills pipeline, reclaim line, for storing filled bottle and the returnable bottle of cold-producing medium, described gas refrigerant is filled pipeline and is all connected with described connecting pipe by described condensing circuit with described reclaim line again, described liquid refrigerant fills pipeline and is directly connected with described connecting pipe, fills pipeline at described gas refrigerant, liquid refrigerant fills pipeline, reclaim line is serially connected with the solenoid valve for pilot piping break-make.
2. air-conditioning system detection experiment system according to claim 1, it is characterized in that: described pressure dwelling loop comprises nitrogen cylinder, described nitrogen cylinder is connected with described connecting pipe by pressurize pipeline, pressurize solenoid valve for pilot piping break-make is serially connected in described pressurize pipeline, the pipeline that described connecting pipe connects also branches out one for emptying pressurize bleeder pipe.
3. air-conditioning system detection experiment system according to claim 1, it is characterized in that: described in vacuumize loop and comprise vacuum pump, described vacuum pump is connected with described connecting pipe by vacuum line, and the vacuum solenoid for pilot piping break-make is serially connected in described vacuum line.
4. air-conditioning system detection experiment system according to claim 1, is characterized in that: described condensing circuit comprises the compressor, oil separator, condenser and the four-way change-over valve that are connected successively by pipeline.
5. air-conditioning system detection experiment system according to claim 4, is characterized in that: in described condensing circuit, be serially connected with filtrator.
6. air-conditioning system detection experiment system according to claim 1, is characterized in that: described filled bottle and returnable bottle are connected to the electronic scales for weighing.
7. air-conditioning system detection experiment system according to claim 1, is characterized in that: described filled bottle and returnable bottle are connected to for emptying evacuated tube.
8. air-conditioning system detection experiment system according to claim 1, is characterized in that: described connecting pipe, pressurize pipeline are provided with connecting interface on described casing.
9. use a test method for the air-conditioning system detection experiment system as described in any one of claim 1-8, it is characterized in that, comprising:
The step of system pipeline pressurize, control nitrogen cylinder is filled with nitrogen, when pipeline inner pressure meets the demands to the pipeline of tested air-conditioning system, closing pipe line makes pipeline enter packing state, the dwell time is controlled by control module, after the dwell time reaches requirement, the nitrogen in discharge pipe;
The step that system pipeline vacuumizes, starts vacuum pump and vacuumizes pipeline, after vacuum tightness reaches requirement in pipeline, closes vacuum pump, and makes tested air-conditioning system pipeline enter vacuum tightness hold mode;
The step of refrigerant-recovery, utilizes condensing circuit that the cold-producing medium in tested air-conditioning system is all condensed into liquid state, then by refrigerant-recovery in returnable bottle, is controlled the recovery time of cold-producing medium by the weight change controlling returnable bottle;
The step of refrigerant charging, by the refrigerant charging in filled bottle in the pipeline of tested air-conditioning system, point liquid refrigerant fills and gas refrigerant fills two stages, by controlling the Weight control refrigerant charge of filled bottle;
By the step of the evacuate air in returnable bottle and filled bottle;
To the step of test figure real time record, output pressure curve, printing test figure.
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