CN101713706B - Detection method of oil return ratio of air conditioning system of large truck - Google Patents
Detection method of oil return ratio of air conditioning system of large truck Download PDFInfo
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- CN101713706B CN101713706B CN 200910195410 CN200910195410A CN101713706B CN 101713706 B CN101713706 B CN 101713706B CN 200910195410 CN200910195410 CN 200910195410 CN 200910195410 A CN200910195410 A CN 200910195410A CN 101713706 B CN101713706 B CN 101713706B
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Abstract
The invention discloses a detection method of the oil return ratio of an air conditioning system of a large truck. The method comprises the following steps of: building an air conditioning system which comprises two subsystems in an environmental simulation laboratory; cleaning and vacuumizing the two subsystems; adding compressor oil; weighing an oil collector assembly and recording the weight W1 of the oil collector assembly, and then mounting the oil collector assembly back to the first subsystem and connecting the second subsystem; opening a hand valve to vacuumize the air conditioning system, and then closing the hand valve and changing cooling medium; adjusting detection conditions, recording data at intervals during boot-strap test, and conforming that the air conditioning system runs normally; opening the hand valve for sampling, then closing the hand valve for stopping running, removing the oil collector assembly to be weighed, and recording the weight W2; and obtaining the oil return ratio R according to R is equal to (W3-W1)/(W2-W1) multiplies 100 percent. The detection method can accurately detect the oil return ratio of the compressor of the air conditioning system of the large truck in the environmental simulation laboratory.
Description
Technical field
The present invention relates to the detection method of car load oil return ratio of air conditioning system, relate in particular to the detection method of oil return ratio of air conditioning system of large truck.
Background technology
Compressor plays a part " system's heart " as one of air-conditioning system four big assemblies, and directly affect the serviceable life of air-conditioning system its serviceable life, and its operation stability also directly affects the operation stability of air-conditioning system.
Compressor is in when work, and a part of compressor oil is with cold-producing medium periodic duty in air-conditioning system, and another part compressor oil then stays in compressor inside, for the operation of compressor provides lubrication.In different air-conditioning systems, because the resistance of expansion valve, evaporator, condenser, liquid trap and pipeline varies in size, the installation site difference, circulating rate and the oil return time of its compressor oil in air-conditioning system is also inequality.In order to guarantee to compress function stable operation, to guarantee that at least a certain amount of compressor oil rests in the compressor, therefore just need detect the oil return ratio of compressor oil in air-conditioning system.
At present, in the air-conditioning system detection of compressor oil oil return ratio be indoor in environmental simulation test, carrying out under the condition of car load, its detection method is as follows: go out flow q in the air-conditioning system with flow measurement
1, utilize the condenser exchange capability of heat to calculate flow q in the air-conditioning system
2, utilize the evaporator exchange capability of heat to calculate flow q in the air-conditioning system
3, then the oil return ratio in the air-conditioning system is: [q
1-(q
2+ q
3)/2]/q
1* 100%.In the environmental simulation test chamber, detect not only expense costliness, and complicated operation; Test on car load, dismounting is also very inconvenient, and work efficiency is lower.And for a lot of large trucks, because excessive, the preponderance of its volume of truck, the space of environmental test chamber is limited, can't hold the volume of truck, and the rotary drum of environmental test chamber also can't bear the weight of truck.Therefore, need a kind of detection method to be used to detect the oil return ratio of air conditioning system of large truck compressor oil.
Summary of the invention
The object of the present invention is to provide a kind of detection method of oil return ratio of air conditioning system of large truck, this detection method can accurately detect air conditioning system of large truck compressor oil oil return ratio in that environmental simulation test is indoor, and it is simple to operate, easy accessibility.
The present invention is achieved in that
A kind of detection method of oil return ratio of air conditioning system of large truck may further comprise the steps:
The first step, detect frock mechanism indoor the building of environmental simulation test, and on detecting frock mechanism according to air conditioning system of large truck in the relevant position of each parts build air-conditioning system, promptly detecting the box assembly that installs an air-conditioner in the frock mechanism, condenser assembly, the oil interceptor assembly, compressor assembly, pipeline and variable-frequency motor, in the air-conditioning box assembly, be provided with the standard-sized sheet expansion valve, by pipeline with the air-conditioning box assembly, condenser assembly and oil interceptor assembly fuse, form first subsystem, wherein the oil interceptor assembly comprises first-hand valve and the second-hand's valve on oil interceptor and the import and export pipeline thereof; Compressor assembly and compressor suction duct, compressor exhaust pipe are formed second subsystem, and compressor assembly links to each other with variable-frequency motor by belt; Above-mentioned first, second subsystem links to each other by pipeline and forms complete air conditioning system of large truck;
Second step use washer respectively first, second subsystem to be cleaned, and for the compressor assembly that cleans second subsystem, cleaning fluid must enter from compressor suction duct, and gas outlet is discharged;
The 3rd step disconnected washer, respectively first, second subsystem is exposed to a period of time in the air, and compressor is put into baking box a period of time, and cleaning fluid is discharged compressor fully, was about to cleaning fluid and discharged whole air-conditioning system fully;
The 4th step connected first, second subsystem, used vacuum pump that the air-conditioning system after connecting is vacuumized, and made not residual cleaning fluid in the air-conditioning system;
The 5th step disconnected first, second subsystem, added a certain amount of compressor oil in the compressor in second system;
The 6th step, in the air-conditioning box assembly of first subsystem, take off the standard-sized sheet expansion valve, change the intact expansion valve of function, disconnect the oil interceptor assembly, the oil interceptor assembly is weighed and the weight that writes down the oil interceptor assembly is W
1Gram, weighing reinstalls first subsystem with the oil interceptor assembly after finishing, and connects first, second subsystem and form complete air-conditioning system;
The 7th step, open oil interceptor in first subsystem and import and export first-hand valve and second-hand's valve on the pipeline, whole air-conditioning system is vacuumized, vacuumize finish after, close first-hand valve and second-hand's valve, and air-conditioning system is charged into the desired coolant quantity of car load by the low pressure valve on the pipeline;
The 8th step, the temperature and humidity that environmental simulation test is indoor is adjusted, after adjustment finishes, i.e. start test, begin air-conditioning system is detected, earlier compressor rotary speed is adjusted to a certain shelves, and the data of the following detection of record at set intervals: dry-bulb temperature, wet-bulb temperature, compressor rotary speed, system high pressure, system low-voltage, leaving air temp, fan blower voltage, cooling blower voltage, evaporator outlet temperature and condensator outlet temperature, if detected data are fuctuation within a narrow range in allowed limits, during no abnormal situation, illustrate that the air-conditioning system operation is normal, otherwise, illustrate that the air-conditioning system operation is undesired, need air-conditioning system is regulated, till the air-conditioning system operation is normal;
The 9th step, after air-conditioning system detects operation a period of time, open first-hand valve and second-hand's valve on the oil interceptor import and export pipeline, take a sample by high-pressure valve, after sampling finishes, close first-hand valve and second-hand's valve again, and stop the air-conditioning system operation, take off the oil interceptor assembly, the oil interceptor assembly is weighed and write down its weight W
2Gram, W
2Gram is the weight sum of the weight of oil interceptor assembly itself and oil interceptor assembly inner compressor oil and refrigerant;
The tenth step, the oil interceptor assembly after placement a period of time, is opened first-hand valve and second-hand's valve on the oil interceptor import and export pipeline slightly, make the refrigerant in the oil interceptor assembly discharge the oil interceptor assembly lentamente, after a period of time, again the oil interceptor assembly is weighed and write down its weight W
3Gram, W
3Gram is the weight sum of the weight of oil interceptor assembly itself and oil interceptor assembly inner compressor oil;
The 11 step is according to formula R=(W
3-W
1)/(W
2-W
1) * 100% calculates the oil return ratio R of compressor rotary speed in a certain when shelves air-conditioning system, wherein (W
3-W
1) be the weight of oil interceptor assembly inner compressor oil, (W
2-W
1) be the weight sum of oil interceptor assembly inner compressor oil and refrigerant, the weight that the oil return ratio R of air-conditioning system is oil interceptor assembly inner compressor oil accounts for the number percent of oil interceptor assembly inner compressor oil and refrigerant weight sum.
(the W that supplement consumed is fallen in the described air-conditioning system after detection finishes
2-W
3) gram refrigerant and used up (W
3-W
1) the gram compressor oil, the air-conditioning system that detects after finishing is returned to detect preceding situation, compressor rotary speed is adjusted to another shelves, and carries out oil return ratio of air conditioning system according to the detection method in above-mentioned the 5th to the tenth step and detect, obtain new data: W respectively
2iGram and W
3iGram, and by formula R
i=(W
3i-W
1)/(W
2i-W
1) * 100% calculates the oil return ratio of air conditioning system R of compressor under other speed conditions
i
Described compressor oil filling quantity is 150 milliliters.
Described refrigerant is the HFC-134a cold-producing medium, and the refrigerant filling quantity that adds in the above-mentioned air-conditioning system is 650 grams.
The present invention is a kind of detection method of oil return ratio of air conditioning system of large truck, this detection method is to detect frock mechanism indoor the building of environmental simulation test, and on detecting frock mechanism according to air conditioning system of large truck in the relevant position of each parts build air-conditioning system, thereby the compressor oil return ratio in this air-conditioning system is accurately detected.Detection method of the present invention mainly is by at different three phases, respectively the oil interceptor assembly is weighed, and obtains following three data: W
1, W
2And W
3, W wherein
1Be the weight of oil interceptor assembly itself, W
2Be the weight of oil interceptor assembly itself and the weight sum of oil interceptor assembly inner compressor oil and refrigerant, W
3Be the weight of oil interceptor assembly itself and the weight sum of oil interceptor assembly inner compressor oil; And according to formula R=(W
3-W
1)/(W
2-W
1) * 100% calculates the oil return ratio R of air-conditioning system, wherein (W
3-W
1) be the weight of oil interceptor assembly inner compressor oil, (W
2-W
1) be the weight sum of oil interceptor assembly inner compressor oil and refrigerant, the weight that the oil return ratio R of air-conditioning system is oil interceptor assembly inner compressor oil accounts for the number percent of oil interceptor assembly inner compressor oil and refrigerant weight sum.This detection method is simple to operate, easy accessibility.
Description of drawings
Fig. 1 is the detection method system schematic of oil return ratio of air conditioning system of large truck of the present invention;
Fig. 2 is the first subsystem synoptic diagram of the present invention;
Fig. 3 is the second subsystem synoptic diagram of the present invention.
Among the figure: 1 air-conditioning box assembly, 2 condenser assemblies, 3 oil interceptor assemblies, 4 compressor assemblies, 401 air intake ducts, 402 gas outlets, 403 compressors, 5 variable-frequency motors, 6 first-hand valves, 7 second-hand's valves, 8 belts, 9 pipelines, 10 high-pressure valves, 11 detect frock mechanism, 12 low pressure valves.
Embodiment
The invention will be further described below in conjunction with the drawings and specific embodiments.
A kind of detection method of oil return ratio of air conditioning system of large truck may further comprise the steps:
The first step, detect frock mechanism 11 indoor the building of environmental simulation test, and on detecting frock mechanism 11 according to air conditioning system of large truck in the relevant position of each parts build air-conditioning system, referring to Fig. 1, promptly detecting the box assembly 1 that installs an air-conditioner in the frock mechanism 11, condenser assembly 2, oil interceptor assembly 3, compressor assembly 4, pipeline 9 and variable-frequency motor 5, in air-conditioning box assembly 1, be provided with the standard-sized sheet expansion valve, by pipeline 9 with air-conditioning box assembly 1, condenser assembly 2 and oil interceptor assembly 3 fuse, form first subsystem, wherein oil interceptor assembly 3 comprises first-hand valve 6 and the second-hand's valve 7 on oil interceptor and the import and export pipeline thereof, referring to Fig. 2; Compressor assembly 4 is formed second subsystem with compressor suction duct 401 and compressor exhaust pipe 402, and referring to Fig. 3, and compressor assembly 4 links to each other with variable-frequency motor 5 by belt 8; Above-mentioned first, second subsystem links to each other by pipeline 9 and forms complete air conditioning system of large truck;
Second step, use washer respectively first, second subsystem to be cleaned, scavenging period respectively is one hour, and for the compressor assembly 4 that cleans in second subsystem, cleaning fluid must enter from the air intake duct 401 of compressor 403, gas outlet 402 is discharged;
The 3rd step disconnected washer, respectively first, second subsystem was exposed in the air two hours, and compressor 403 was put into baking box one hour, so that allow cleaning fluid discharge fully in the compressor 403, promptly allowed cleaning fluid discharge whole air-conditioning system fully;
The 4th step connected first, second subsystem, used vacuum pump that the air-conditioning system after connecting is vacuumized, and the time is roughly two hours, to guarantee not residual any cleaning fluid in the air-conditioning system;
The 5th step disconnected first, second subsystem, added a certain amount of compressor oil in the compressor 403 in second system, and in the present invention, the compressor oil filling quantity is 150 milliliters;
The 6th step, in the air-conditioning box assembly 1 of first subsystem, take off the standard-sized sheet expansion valve, change the intact expansion valve of function, disconnect oil interceptor assembly 3, oil interceptor assembly 3 is weighed and write down its weight is W
1Gram, W
1Gram is the weight of oil interceptor assembly 3 itself, weighs oil interceptor assembly 3 to be reinstalled first subsystem after finishing, and connects first, second subsystem and form complete air-conditioning system;
The 7th step, open first-hand valve 6 and second-hand's valve 7 on the oil interceptor import and export pipeline in first subsystem, whole air-conditioning system is vacuumized half an hour, vacuumize finish after, close first-hand valve 6 and second-hand's valve 7, and charge into the desired coolant quantity of car load, in the present invention by 12 pairs of air-conditioning systems of the low pressure valve on the pipeline 9, refrigerant is the HFC-134a cold-producing medium, and the refrigerant filling quantity that adds in the above-mentioned air-conditioning system is 650 grams;
The 8th step, the temperature and humidity that environmental simulation test is indoor is adjusted, after adjustment finishes, i.e. start test, begin air-conditioning system is detected, earlier compressor 403 rotational speed regulation are arrived a certain shelves, and the data of the following detection of record at set intervals: dry-bulb temperature, wet-bulb temperature, compressor 403 rotating speeds, system high pressure, system low-voltage, leaving air temp, fan blower voltage, cooling blower voltage, evaporator outlet temperature and condensator outlet temperature, thereby confirm whether air-conditioning system is moved normally, if detected data are fuctuation within a narrow range in allowed limits, during no abnormal situation, illustrate that the air-conditioning system operation is normal, otherwise, illustrate that the air-conditioning system operation is undesired, need air-conditioning system is regulated, till the air-conditioning system operation is normal;
In the present invention, with 38 ℃ of testing laboratory's temperature, relative humidity 40%, compressor 403 rotating speeds are embodiment one under the 1000rpm condition, every ten minutes above-mentioned detection data are carried out record, concrete data are referring to table one:
Table one:
| 10 minutes | 20 minutes | 30 minutes | 40 minutes | 50 minutes | 60 minutes | |
| Dry-bulb temperature (℃) | 38.22 | 38.15 | 38.08 | 38.06 | 38.03 | 37.95 |
| Wet-bulb temperature (℃) | 24.2 | 24.23 | 24.28 | 24.28 | 24.29 | 24.3 |
| Compressor rotary speed (rpm) | 980 | 980 | 970 | 990 | 1000 | 1010 |
| System high pressure (Mpa) | 1.843 | 1.852 | 1.877 | 1.875 | 1.872 | 1.874 |
| System low-voltage (Mpa) | 0.431 | 0.423 | 0.397 | 0.408 | 0.408 | 0.407 |
| Leaving air temp (℃) | 24.9 | 25.0 | 25.1 | 25.1 | 25.1 | 25.1 |
| Fan blower voltage (V) | 27 | 27 | 27 | 27 | 27 | 27 |
| Cooling blower voltage (V) | 24 | 24 | 24 | 24 | 24 | 24 |
| Evaporator outlet temperature (℃) | 22.5 | 22.5 | 22.3 | 22.5 | 22.8 | 23.6 |
| The condensator outlet temperature (℃) | 52.3 | 52.1 | 52.0 | 52.0 | 52.2 | 52.5 |
Above-mentioned detection data are fuctuation within a narrow range in allowed limits, no abnormal situation, so this air-conditioning system operation is normal.
The 9th step, air-conditioning system detected operation after one hour, open first-hand valve 6 and second-hand's valve 7 on the oil interceptor import and export pipeline, take a sample by high-pressure valve 10, after sampling finishes, close first-hand valve 6 and second-hand's valve 7 again, and stop the air-conditioning system operation, take off oil interceptor assembly 3, oil interceptor assembly 3 is weighed and write down its weight W
2Gram, W at this moment
2Gram is the weight of oil interceptor assembly 3 itself and the weight sum of oil interceptor assembly 3 inner compressor oil and refrigerant;
The tenth step, after oil interceptor assembly 3 placed one hour, open first-hand valve 6 and second-hand's valve 7 on the oil interceptor import and export pipeline slightly, make the refrigerant in the oil interceptor assembly 3 discharge oil interceptor assembly 3 lentamente, after two hours, again oil interceptor assembly 3 is weighed and write down its weight W
3Gram, W
3Gram is the weight of oil interceptor assembly 3 itself and the weight sum of oil interceptor assembly 3 inner compressor oil;
The 11 step is according to formula R=(W
3-W
1)/(W
2-W
1) * 100% calculates the oil return ratio R of compressor 403 rotating speeds air-conditioning system when the 1000rpm shelves, wherein (W
3-W
1) be the weight of oil interceptor assembly 3 inner compressor oil, (W
2-W
1) be the weight sum of oil interceptor assembly 3 inner compressor oil and refrigerant, the weight that the oil return ratio R of air-conditioning system is oil interceptor assembly 3 inner compressor oil accounts for the number percent of oil interceptor assembly 3 inner compressor oil and refrigerant weight sum.
In the present embodiment, obtain W respectively by above-mentioned detection method
1, W
2And W
3Numerical value: W
1=650.2 grams, W
2=695.5 grams, W
3=655.2 grams, by above-mentioned formula:
R=(W
3-W
1)/(W
2-W
1) * 100% calculates R=11.04%, and promptly this air-conditioning compressor 403 is under the condition of 1000rpm at rotating speed, and its oil return ratio is 11.04%.
Embodiment two:
(the W that supplement consumed is fallen in the air-conditioning system after detection finishes
2-W
3) gram refrigerant and used up (W
3-W
1) the gram compressor oil, the air-conditioning system that detects after finishing is returned to detect preceding situation, compressor 403 rotational speed regulation are arrived another shelves, and carry out oil return ratio of air conditioning system according to the detection method in above-mentioned the 5th to the tenth step and detect.
Based on the foregoing description one, when compressor 403 rotating speeds are the 3000rpm shelves, need in air-conditioning system, to replenish 40.3 gram refrigerants and 5 gram compressor oils.Simultaneously, in the process that detects, still every ten minutes above-mentioned detection data are carried out record, thereby confirm whether air-conditioning system is moved normally, specifically data are referring to table two:
Table two:
| 10 minutes | 20 minutes | 30 minutes | 40 minutes | 50 minutes | 60 minutes | |
| Dry-bulb temperature (℃) | 38.32 | 38.30 | 38.29 | 38.16 | 38.06 | 38.03 |
| Wet-bulb temperature (℃) | 26.50 | 26.35 | 26.28 | 26.22 | 26.19 | 26.18 |
| Compressor rotary speed (rpm) | 2998 | 3003 | 3010 | 3000 | 3008 | 3005 |
| System high pressure (Mpa) | 19.34 | 19.24 | 19.19 | 19.13 | 19.04 | 18.94 |
| System low-voltage (Mpa) | 0.345 | 0.340 | 0.336 | 0.336 | 0.336 | 0.337 |
| Leaving air temp (℃) | 20.2 | 20.4 | 20.7 | 20.6 | 20.7 | 20.7 |
| Fan blower voltage (V) | 27 | 27 | 27 | 27 | 27 | 27 |
| Cooling blower voltage (V) | 24 | 24 | 24 | 24 | 24 | 24 |
| Evaporator outlet temperature (℃) | 20.2 | 20.2 | 20.3 | 20.2 | 20.1 | 19.7 |
| The condensator outlet temperature (℃) | 59.2 | 58.6 | 57.5 | 57.8 | 57.6 | 58 |
Above-mentioned detection data are fuctuation within a narrow range in allowed limits, no abnormal situation, so this air-conditioning system operation is normal.
After detection finishes, obtain new data: W respectively
2i=693.5 grams, W
3i=653.8 grams, W
1Numerical value is constant, still is 650.2 grams, passes through formula then:
R
i＝(W
3i-W
1)/(W
2i-W
1)×100％，
Calculate R
i=8.31%, promptly this air-conditioning compressor 403 is under the condition of 3000rpm at rotating speed, and its oil return ratio is 8.31%.
The present invention can accurately detect air conditioning system of large truck compressor oil oil return ratio in that environmental simulation test is indoor, and it is simple to operate, easy accessibility.
Claims (4)
1. the detection method of an oil return ratio of air conditioning system of large truck, it is characterized in that: described detection method may further comprise the steps:
The first step, detect frock mechanism indoor the building of environmental simulation test, and on detecting frock mechanism according to air conditioning system of large truck in the relevant position of each parts build air-conditioning system, promptly detecting the box assembly that installs an air-conditioner in the frock mechanism, condenser assembly, the oil interceptor assembly, compressor assembly, pipeline and variable-frequency motor, in the air-conditioning box assembly, be provided with the standard-sized sheet expansion valve, by pipeline with the air-conditioning box assembly, condenser assembly and oil interceptor assembly fuse, form first subsystem, wherein the oil interceptor assembly comprises first-hand valve and the second-hand's valve on oil interceptor and the import and export pipeline thereof; Compressor assembly and compressor suction duct, compressor exhaust pipe are formed second subsystem, and compressor assembly links to each other with variable-frequency motor by belt; Above-mentioned first, second subsystem links to each other by pipeline and forms complete air conditioning system of large truck;
Second step use washer respectively first, second subsystem to be cleaned, and for the compressor assembly that cleans second subsystem, cleaning fluid must enter from compressor suction duct, and gas outlet is discharged;
The 3rd step disconnected washer, respectively first, second subsystem is exposed to a period of time in the air, and compressor is put into baking box a period of time, and cleaning fluid is discharged compressor fully, was about to cleaning fluid and discharged whole air-conditioning system fully;
The 4th step connected first, second subsystem, used vacuum pump that the air-conditioning system after connecting is vacuumized, and made not residual cleaning fluid in the air-conditioning system;
The 5th step disconnected first, second subsystem, added a certain amount of compressor oil in the compressor in second system;
The 6th step, in the air-conditioning box assembly of first subsystem, take off the standard-sized sheet expansion valve, change the intact expansion valve of function, disconnect the oil interceptor assembly, the oil interceptor assembly is weighed and the weight that writes down the oil interceptor assembly is W
1Gram, weighing reinstalls first subsystem with the oil interceptor assembly after finishing, and connects first, second subsystem and form complete air-conditioning system;
The 7th step, open oil interceptor in first subsystem and import and export first-hand valve and second-hand's valve on the pipeline, whole air-conditioning system is vacuumized, vacuumize finish after, close first-hand valve and second-hand's valve, and air-conditioning system is charged into the desired coolant quantity of car load by the low pressure valve on the pipeline;
The 8th step, the temperature and humidity that environmental simulation test is indoor is adjusted, after adjustment finishes, i.e. start test, begin air-conditioning system is detected, earlier compressor rotary speed is adjusted to a certain shelves, and the data of the following detection of record at set intervals: dry-bulb temperature, wet-bulb temperature, compressor rotary speed, system high pressure, system low-voltage, leaving air temp, fan blower voltage, cooling blower voltage, evaporator outlet temperature and condensator outlet temperature, if detected data are fuctuation within a narrow range in allowed limits, during no abnormal situation, illustrate that the air-conditioning system operation is normal, otherwise, illustrate that the air-conditioning system operation is undesired, need air-conditioning system is regulated, till the air-conditioning system operation is normal;
The 9th step, after air-conditioning system detects operation a period of time, open first-hand valve and second-hand's valve on the oil interceptor import and export pipeline, take a sample by high-pressure valve, after sampling finishes, close first-hand valve and second-hand's valve again, and stop the air-conditioning system operation, take off the oil interceptor assembly, the oil interceptor assembly is weighed and write down its weight W
2Gram, W
2Gram is the weight sum of the weight of oil interceptor assembly itself and oil interceptor assembly inner compressor oil and refrigerant;
The tenth step, the oil interceptor assembly after placement a period of time, is opened first-hand valve and second-hand's valve on the oil interceptor import and export pipeline slightly, make the refrigerant in the oil interceptor assembly discharge the oil interceptor assembly lentamente, after a period of time, again the oil interceptor assembly is weighed and write down its weight W
3Gram, W
3Gram is the weight sum of the weight of oil interceptor assembly itself and oil interceptor assembly inner compressor oil;
The 11 step is according to formula R=(W
3-W
1)/(W
2-W
1) * 100% calculates the oil return ratio R of compressor rotary speed in a certain when shelves air-conditioning system, wherein (W
3-W
1) be the weight of oil interceptor assembly inner compressor oil, (W
2-W
1) be the weight sum of oil interceptor assembly inner compressor oil and refrigerant, the weight that the oil return ratio R of air-conditioning system is oil interceptor assembly inner compressor oil accounts for the number percent of oil interceptor assembly inner compressor oil and refrigerant weight sum.
2. the detection method of oil return ratio of air conditioning system of large truck according to claim 1 is characterized in that: (the W that supplement consumed is fallen in the described air-conditioning system after detection finishes
2-W
3) gram refrigerant and used up (W
3-W
1) the gram compressor oil, the air-conditioning system that detects after finishing is returned to detect preceding situation, compressor rotary speed is adjusted to another shelves, and carries out oil return ratio of air conditioning system according to the detection method in above-mentioned the 5th to the tenth step and detect, obtain new data: W respectively
2iGram and W
3iGram, and by formula R
i=(W
3i-W
1)/(W
2i-W
1) * 100% calculates the oil return ratio of air conditioning system R of compressor under other speed conditions
i
3. the detection method of oil return ratio of air conditioning system of large truck according to claim 1, it is characterized in that: described compressor oil filling quantity is 150 milliliters.
4. the detection method of oil return ratio of air conditioning system of large truck according to claim 1, it is characterized in that: described refrigerant is the HFC-134a cold-producing medium, and the refrigerant filling quantity that adds in the above-mentioned air-conditioning system is 650 grams.
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|---|---|---|---|
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|---|---|---|---|
| CN 200910195410 CN101713706B (en) | 2009-09-09 | 2009-09-09 | Detection method of oil return ratio of air conditioning system of large truck |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5441099A (en) * | 1993-08-23 | 1995-08-15 | Ford Motor Company | Method and apparatus for forcibly cooling components of an automotive vehicle prior to emission tesing |
| CN101338961A (en) * | 2008-08-18 | 2009-01-07 | 南京天加空调设备有限公司 | Automatic oil return control method and device for refrigeration system |
-
2009
- 2009-09-09 CN CN 200910195410 patent/CN101713706B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5441099A (en) * | 1993-08-23 | 1995-08-15 | Ford Motor Company | Method and apparatus for forcibly cooling components of an automotive vehicle prior to emission tesing |
| CN101338961A (en) * | 2008-08-18 | 2009-01-07 | 南京天加空调设备有限公司 | Automatic oil return control method and device for refrigeration system |
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Address after: 201204 Pudong New Area South Road, Shanghai, No. 1768 Patentee after: Shanghai Aisidake Automotive Air Conditioning Systems Co. Address before: 201204 Pudong South Road, Shanghai, No. 1768 Patentee before: Shanghai Delphi Auto A/C Systems Co., Ltd. |
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