CN205654540U - Rotary compressor leaks characteristic test system based on phase place triggers stroboscopic method - Google Patents
Rotary compressor leaks characteristic test system based on phase place triggers stroboscopic method Download PDFInfo
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- CN205654540U CN205654540U CN201620384140.8U CN201620384140U CN205654540U CN 205654540 U CN205654540 U CN 205654540U CN 201620384140 U CN201620384140 U CN 201620384140U CN 205654540 U CN205654540 U CN 205654540U
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Abstract
The utility model provides a rotary compressor leaks characteristic test system based on phase place triggers stroboscopic method belongs to compressor leakage characteristic test technical field, including rotary compressor, rotary compressor includes that it separates high pressure chest and the low pressure chamber that forms to connect the compressor rotor through the compressor blade, and the high pressure chest feeds through in proper order has the pressure proportion to allocate valve, fluid distribution device, temperature controller and high pressure gas tank, and high pressure gas tank rethread backpressure jar is connected with the low pressure chamber, still include air supply compressor, central controller, rotational speed and phase sensor, stroboscopic trigger and camera, the air supply compressor is connected with high pressure gas tank, central controller is connected with rotational speed and phase sensor and stroboscopic trigger respectively, the camera is located the compressor rotor and is close to compressor shell one side, and its camera lens is towards the compressor head, the compressor head adopts the transparent material preparation. The utility model discloses a " the phase place triggers formula stroboscopic device " can leak the passageway to the compressor and shoot and note the leakage details.
Description
[technical field]
This utility model relates to compressor leakage characteristic test technical field, particularly to a kind of rotary compressor leakage characteristics test system triggering stroboscopic method based on phase place.
[background technology]
Rotary compressor is a kind of typical volumes formula fluid machinery having a large capacity and a wide range and have relatively deep impact, is widely used in various gas compressing equipment and refrigerating air conditioning device.But, for a long time, there is the defect that volumetric efficiency is low and loss of refrigeration capacity is big in rotary compressor always, its reason is, there is multiple motion fit clearance in rotary compressor, this motion fit clearance can increase the leakage path within compressor, thus cause working medium to alter, from the compression chamber of high pressure, the leakage rate of suction muffler escaped to low pressure and increase, and then make the volumetric efficiency of compressor reduce, therefore, how preventing from leaking is vane compressor important topic urgently to be resolved hurrily, is the most also needs that are energy-saving and cost-reducing and that build a conservation-minded society.
In order to improve the volumetric efficiency of rotary compressor and reduce loss of refrigeration capacity, need to manage to control the fit clearance of its kinematic pair, and to realize this target, then have to be understood that the leakage characteristics of rotary compressor, i.e., it should be understood that different pressures or at a temperature of working medium how to leak, and leakage rate is how many.
Actually, the leakage characteristics of rotary compressor and the gap width size of compressor kinematic pair, coordinate the factors such as pose, kinestate, lubricating property, nowed forming, temperature the most relevant, existing leakage characteristics measuring method mainly takes simulation experiment measurement method, in the case of static clearance and static pressure reduction, i.e. observe leakage characteristics, or the motion conditions under analog compression machine is at actual condition in the environment of fixed interval (FI) and fixing pressure reduction and then observe leakage situation.But, there is shortcomings in these measuring methods: 1. in the case of static clearance and static pressure reduction, this simplification makes model there is bigger discrepancy with actual state, the factors such as compressor rotary speed, atmospheric pressure, lubrication state, temperature can not be considered comprehensively, thus also cannot accurately describe the unsteady simulation in compressor minim gap；2., in the environment of fixed interval (FI) and fixing pressure reduction, the motion conditions of the compressor simulated can not comprehensively include compressor gap and change conditions of pressure reduction under actual condition, bigger with actual variance.Therefore, leakage characteristics measures it is critical only that of technology makes experiment condition consistent with actual condition as far as possible, the most preferably tests at the enterprising Mobile state of compressor body.
[utility model content]
In view of foregoing, it is necessary to provide a kind of rotary compressor leakage characteristics test system triggering stroboscopic method based on phase place, should rotary compressor leakage characteristics test system based on phase place triggering stroboscopic method be a kind of method gathering and processing the leakage of compressor internal working medium on compressor body under the conditions of integration dynamic differential pressure, dynamic clearance, dynamic working medium, and use " phase place trigger-type strobe apparatus ", compressor leakage passage can be shot and record leakage details, and the leakage rate of working medium can be measured.
For reaching above-mentioned purpose, this utility model be the technical scheme is that the rotary compressor leakage characteristics test system triggering stroboscopic method based on phase place, including rotary compressor, described rotary compressor includes connecting, by compressor blade, high pressure chest and the low pressure chamber that compressor drum is separated, described high pressure chest has been sequentially communicated pressure proportional deployment valve, liquid dispensing device, temperature controller and high pressure gas holder, and described high pressure gas holder is connected with described low pressure chamber by back pressure tank again；Also include source of the gas compressor, central controller, rotating speed and phase detector, stroboscopic trigger and photographing unit；Described source of the gas compressor is connected with high pressure gas holder；Described central controller is connected with described rotating speed and phase detector and stroboscopic trigger respectively；Described photographing unit is positioned at described compressor drum near compressor case side, and its camera lens is towards compressor head, it is possible to run under the triggering of described flash card trigger；Described compressor head uses transparent material to make.
Further, described rotary compressor leakage characteristics test system based on phase place triggering stroboscopic method also includes measurement cylinder, check (non-return) valve, described temperature controller and the controlling valve being arranged between described back pressure tank and low pressure chamber；Described measurement cylinder includes upper chamber and lower chambers, and described upper chamber connects described back pressure tank by valve；Described lower chambers passes sequentially through described check (non-return) valve, temperature controller and controlling valve and connects described low pressure chamber；Being additionally provided with piston between described lower chambers and upper chamber, described piston connects the displacement transducer outside described upper chamber by the connecting shaft crossing described upper chamber.
Further, described bottom chamber is provided with sealing fluid, and this sealing fluid is same with the storage liquid phase in described liquid dispensing device；Described check (non-return) valve is connected with described lower chambers by non-return pipeline, and this non-return pipeline is positioned in described sealing fluid with the connection end of described lower chambers.
Further, described lower chambers is provided with vent valve；The blowdown piping that described vent valve connects with lower chambers stretches into described lower chambers, and the blowdown piping opening of described bottom chamber is positioned at above described sealing fluid.
Further, described controlling valve is threeway controlling valve, is also associated with noise elimination fog-dissipation device simultaneously；Described controlling valve is connected with central controller.
Further, described high pressure gas holder is connected with constant-pressure tank by regulation valve, and described constant-pressure tank is connected with described temperature controller again.
Further, described central controller is also connected with described pressure proportional deployment valve and temperature controller.
Further, described high pressure gas holder is all connected by valve with described back pressure tank and source of the gas compressor.
Further, described photographing unit be arranged in parallel with compressor drum axis, and its camera lens faces described end cap.
Further, described high pressure gas holder, constant-pressure tank, back pressure tank, high pressure chest entrance, the upper chamber measuring cylinder and lower chambers are respectively connected with Pressure gauge.
This utility model has the advantages that
1. this utility model uses phase place trigger-type strobe apparatus, with the continuous motor process of refrigerant leakage in the phase place trigger by arranging and high-speed motion picture camera recording compressed machine internal leakage passage, has that intuitive is strong, be prone to the features such as collection.
2. this utility model measures the leakage rate of compressor by arranging parts such as measuring cylinder, makes experiment can not only obtain the details of compressor leakage passage refrigerant leakage, additionally it is possible to record the leakage rate of working medium, and then can more fully measure the leakage characteristics of compressor.
3. this utility model is measured at the enterprising Mobile state of real rotary compressor, and use central controller to carry out omnidistance dynamic regulation to power pressure, rotating speed, temperature, leakage path gap etc. are multifactor, so that experiment condition is closer to actual condition, and then the shortcomings such as simulation experiment measurement method analog compression machine operating mode and leakage path and actual error are big can be overcome；Furthermore, by central controller, experimentation is carried out compressor refrigerant leakage amount and the leakage process of shooting leakage path working medium of dynamic regulation mensuration, its measurement error is less, and the setting of influence factor's variable is more reliable, and measure and shooting process more comprehensively, operation more convenient.
[accompanying drawing explanation]
Fig. 1 is the principle schematic that this utility model triggers the rotary compressor leakage characteristics test system of stroboscopic method based on phase place.Main element symbol description
In figure, 1-source of the gas compressor, 2-high pressure gas holder, 3-constant-pressure tank, 4-back pressure tank, 5-measure cylinder, 6-regulation valve, 7-balanced valve, 8-connection valve, 9-vent valve, 10-sealing fluid, 11-displacement transducer, 12-pressure proportional deployment valve, 13-threeway controlling valve, 14-distributing device, 15-rotating speed and phase detector, 16-stroboscopic trigger, 17-compressor drum, 18-compressor blade, 19-high pressure chest, 20-low pressure chamber, 21-photographing unit, 22-Pressure gauge, 23-temperature controller, 24-non-return valve, 25-noise elimination fog-dissipation device, 26-central controller.
Following detailed description of the invention will further illustrate this utility model in conjunction with above-mentioned accompanying drawing.
[detailed description of the invention]
Refer to Fig. 1, in a kind of better embodiment of the present utility model, one triggers the rotary compressor leakage characteristics test system of stroboscopic method based on phase place, measures cylinder 5, check (non-return) valve 24, controlling valve, noise elimination fog-dissipation device 25, displacement transducer 11, central controller 26, rotating speed and phase detector 15, stroboscopic trigger 16 and a photographing unit 21 including a rotary compressor, source of the gas compressor 1, high pressure gas holder 2, constant-pressure tank 3, back pressure tank 4, two temperatures controller 23, liquid dispensing device 14, pressure proportional deployment valve 12,.Rotary compressor includes mainly being connected, by compressor blade 18, high pressure chest 19 and the low pressure chamber 20 that compressor drum 17 is separated, high pressure chest 19 is sequentially communicated pressure proportional deployment valve 12, liquid dispensing device 14, temperature controller 23, constant-pressure tank 3 and high pressure gas holder 2, high pressure gas holder 2 connects low pressure chamber 20 by back pressure tank 4 again, and high pressure gas holder 2 is also connected with source of the gas compressor 1.Also by measuring cylinder 5, check (non-return) valve 24, temperature controller 23 and controlling valve connection between back pressure tank 4 and low pressure chamber 20, wherein, measuring cylinder 5 and include upper chamber and lower chambers, upper chamber connects back pressure tank 4 by a connection valve 8；Lower chambers is sequentially connected with check (non-return) valve 24, temperature controller 23 and controlling valve, after by controlling valve connect low pressure chamber 20；Being additionally provided with piston between lower chambers and upper chamber, piston connects displacement transducer 11 by connecting shaft.Central controller 26 is connected with rotating speed and phase detector 15 and stroboscopic trigger 16 respectively, it is able to receive that compressor drum 17 rotating speed and rotation phase angle information that rotating speed and phase detector 15 collect, and send control instruction according to this rotation phase angle information, and then photographing unit 21 is promoted to run by controlling stroboscopic trigger 16 operation.Preferably, rotating speed and phase detector 15 are arranged on rotary compressor, and its detection position is positioned at inside rotary compressor, in order to the rotating speed of experiments of measuring process compresses machine rotor 17 and rotation phase angle.
Further, please continue to refer to Fig. 1, high pressure gas holder 2 is all connected with constant-pressure tank 3 and source of the gas compressor 1 by regulation valve 6, enters the air inflow of rotary compressor with regulation；Connected by a balanced valve 7 when high pressure gas holder 2 is connected with back pressure tank 4, for maintaining stablizing of experimentation air pressure.The constant-pressure tank 3 that experiment is used is to prevent experimentation from pulsatile impact, and then the accuracy of impact experiment occur；The gas that source of the gas compressor 1 is used for providing experiment；Back pressure tank 4 is then to make the pressure of low pressure chamber 20 be maintained on certain value, and to form back pressure, this back pressure is slightly larger than atmospheric pressure.
Further, measuring and be provided with non-return pipeline between lower chambers and the check (non-return) valve 24 of cylinder 5, non-return pipeline one end connects with check (non-return) valve 24, and the other end is connected with lower chambers, and stretches into bottom chamber.Bottom chamber is provided with sealing fluid 10, and sealing fluid 10 leaks in order to prevent the gas of bottom chamber, it is preferable that sealing fluid 10 is same with the storage liquid phase in liquid dispensing device 14.Further, non-return pipeline stretches into the connection end of bottom chamber and is positioned in sealing fluid 10, to prevent the gas backflow of bottom chamber from entering in non-return pipeline, and then affects the accuracy of refrigerant leakage measurement.Furthermore, in order to prevent bottom chamber gas and sealing fluid 10 from blowing back into non-return pipeline, and then entering rotary compressor, being normally carried out of impact experiment, this utility model is provided with check (non-return) valve 24 between measurement cylinder 5 and low pressure chamber 20, to ensure the stability of experiment.
Lower chambers is additionally provided with vent valve 9, and vent valve 9 is for removing the gas of bottom chamber, and during to ensure that experiment is initial, bottom chamber resets without gas, displacement transducer 11, and then ensures the accuracy that experiment is measured.Preferably, between vent valve 9 and lower chambers, it is provided with the blowdown piping stretching into bottom chamber, above this blowdown piping is positioned at sealing fluid 10 with the opening that lower chambers connects, measures cylinder 5 ensureing that the gas of bottom chamber can be discharged by this blowdown piping.
The connecting shaft that upper chamber is arranged crosses upper chamber, and one end is connected with piston, and the other end stretches out upper chamber, and the displacement transducer 11 outdoor with being positioned at upper chamber is connected.Displacement transducer 11 is for measuring the distance that piston moves, and then can record the leakage rate of experimentation working medium.
Further, please continue to refer to Fig. 1, controlling valve is threeway controlling valve 13, it is connected with low pressure chamber 20, noise elimination fog-dissipation device 25 and temperature controller 23 respectively, so that the gas-liquid mixture flowed out from low pressure chamber 20 first can flow to temperature controller 23 after noise elimination fog-dissipation device 25 eliminates aerosol, and then improve the accuracy of refrigerant leakage amount.Preferably, threeway controlling valve 13 is connected with central controller 26, it is possible to folding under the control of central controller 26.
Further, photographing unit 21 is positioned at compressor drum 17 near compressor case side, and its camera lens is towards compressor head, preferably, photographing unit 21 be arranged in parallel with compressor drum 17 axis, and its camera lens faces end cap, in order to preferably photograph refrigerant leakage situation at leakage path.Further, compressor head uses transparent material to make, and is beneficial to photographing unit 21 and can photograph inside rotary compressor.
Further, please continue to refer to Fig. 1, central controller 26 is also connected with pressure proportional deployment valve 12 and two temperatures controller 23, it is possible to the most accurate dynamically regulation enters the pressure and temperature of high pressure chest 19 gas-liquid mixture.This utility model arranges two temperatures controller 23, it is possible to the preferably bulk temperature of Control release process, prevents because temperature affects the leakage situation of rotary compressor；Pressure proportional deployment valve 12 can regulate ratio and the pressure entering high pressure chest 19 gas-liquid mixture, to simulate actual condition when rotary compressor runs.
Further, high pressure gas holder 2, constant-pressure tank 3, back pressure tank 4, high pressure chest 19 entrance, the upper chamber measuring cylinder 5 and lower chambers are respectively connected with Pressure gauge 22, in order to monitor the pressure condition of each equipment.
The workflow of the described rotary compressor leakage characteristics test system triggering stroboscopic method based on phase place is: source of the gas compressor 1 provides the gas needed for experiment, gas flows through high pressure gas holder 2, constant-pressure tank 3 and temperature controller 23 successively, after mixing with section store liquid in liquid dispensing device 14 afterwards, entered the high pressure chest 19 of rotary compressor by pressure proportional deployment valve 12, and promote compressor drum 17 to rotate；Part gas-liquid mixture flows into low pressure chamber 20 from the leakage path within rotary compressor, it flow to temperature controller 23, check (non-return) valve 24 again after the noise elimination fog-dissipation device 25 that threeway controlling valve 13 connects, finally flow into the bottom chamber measuring cylinder 5, and promote shifting on the piston measuring cylinder 5, piston drives connecting shaft to move again, and then makes displacement transducer 11 collect the moving displacement of piston；Because moving on piston so that the gas measured in the upper chamber of cylinder 5 enters in back pressure tank 4 by regulation valve 6, the rear back pressure tank 4 that passes through flow to high pressure gas holder 2, i.e. completes a cyclic process.
When gas-liquid mixture promotes compressor drum 17 to rotate, rotating speed and phase detector 15 can the phase angles that rotate of collect and process machine rotor 17, when compressor drum 17 turns to central controller 26 phase angle set in advance, collection signal is fed back to central controller 26 by rotating speed and phase detector 15, central controller 26 sends control signal to stroboscopic trigger 16 again, with the triggering by stroboscopic trigger 16, photographing unit 21 is run, and then make photographing unit 21 shoot and record under this phase angle the leakage process of working medium at rotary compressor leakage path.
The operation principle of the described rotary compressor leakage characteristics test system triggering stroboscopic method based on phase place and experimentation:
1), before experiment, test initial value and regulation experiment equipment are set.First, central controller 26 presets experimental temperature, phase angle, the pressure ratio of experiment gas-liquid mixture；Then, liquid dispensing device 14 is regulated according to preliminary setting data；Finally, open vent valve 9, make measurement cylinder 5 piston be displaced downwardly to bottom and be positioned at above sealing fluid 10, and displacement transducer 11 is reset.
2) during experiment, first, open source of the gas compressor 1 and make it run a period of time, gas enters high pressure gas holder 2 and constant-pressure tank 3 by correspondence regulation valve 6, constant-pressure tank 3 can keep the high-pressure gas pressure inputted constant, treat that gas temperature reaches preset value, central controller 26 opens pressure proportional deployment valve 12 according to preset pressure value, gas-liquid mixture is made to enter compressor high pressure chest 19 and promote compressor drum 17 to operate, when compressor drum 17 runs to when setting phase angle, rotating speed and phase detector 15 feed back information to central controller 26, central controller 26 controls stroboscopic trigger 16 again and then promotes photographing unit 21 to shoot and record under this phase angle the leakage process of working medium at rotary compressor internal leakage passage；The working medium of leakage enters threeway controlling valve 13 after leakage path enters low pressure chamber 20, entered by non-return valve after noise elimination fog-dissipation device 25 through being connected with threeway controlling valve 13 is eliminated the noise and dispersed fog again and measure cylinder 5 lower chambers, and promote shifting on measurement cylinder 5 piston, after multiple circulations, displacement transducer 11 has considerable registration, now can measure refrigerant leakage amount.
3) repeating said process, change specified gap numerical value, central controller 26 sets different pressures, temperature, can observe the leakage process under the conditions of different gap, temperature, pressure etc. respectively and measure leakage rate, completes tested compressor leakage characteristic test.
This utility model is a kind of method gathering and processing the leakage of compressor internal working medium on compressor body under the conditions of integration dynamic differential pressure, dynamic clearance, dynamic working medium, and use " phase place trigger-type strobe apparatus " and displacement transducer 11, it is achieved the shooting of rotary compressor internal leakage passage refrigerant leakage process and the measurement of refrigerant leakage amount；Experimental facilities is connected by this utility model with central controller 26, omnidistance dynamic regulation can be carried out to experimentation power pressure, temperature, compressor drum 17 rotating speed, leakage path gap etc. are multifactor, so that experiment condition is closer to actual condition, and then overcome the shortcomings such as simulation experiment measurement method analog compression machine operating mode and leakage path and actual error are big；Furthermore, the multiple variable factors affecting rotary compressor leakage can be set by central controller 26, and then rotary compressor leakage process under the conditions of different gap, temperature, pressure etc. can be observed and measure leakage rate, shooting and measurement are the most comprehensive, and the leakage process of shooting leakage path working medium is the most detailed, the measurement error of the compressor refrigerant leakage amount measured is less, and experiment is more reliable, operates relatively simple.
Described above is the detailed description for the preferable possible embodiments of this utility model, but embodiment is not limited to patent claim of the present utility model, the equal change completed under technical spirit suggested by all this utility model or modification change, all should belong to the contained the scope of the claims of this utility model.
Claims (10)
1. the rotary compressor leakage characteristics test system of stroboscopic method is triggered based on phase place, including rotary compressor, described rotary compressor includes connecting, by compressor blade, high pressure chest and the low pressure chamber that compressor drum is separated, it is characterized in that: described high pressure chest has been sequentially communicated pressure proportional deployment valve, liquid dispensing device, temperature controller and high pressure gas holder, described high pressure gas holder is connected with described low pressure chamber by back pressure tank again；
Also include source of the gas compressor, central controller, rotating speed and phase detector, stroboscopic trigger and photographing unit；Described source of the gas compressor is connected with high pressure gas holder；Described central controller is connected with described rotating speed and phase detector and stroboscopic trigger respectively；Described photographing unit is positioned at described compressor drum near compressor case side, and its camera lens is towards compressor head, it is possible to run under the triggering of described stroboscopic trigger；Described compressor head uses transparent material to make.
2. the rotary compressor leakage characteristics test system of stroboscopic method is triggered as claimed in claim 1 based on phase place, it is characterised in that: also include measurement cylinder, check (non-return) valve, described temperature controller and the controlling valve being arranged between described back pressure tank and low pressure chamber；Described measurement cylinder includes upper chamber and lower chambers, and described upper chamber connects described back pressure tank by valve；Described lower chambers passes sequentially through described check (non-return) valve, temperature controller and controlling valve and connects described low pressure chamber；Being additionally provided with piston between described lower chambers and upper chamber, described piston connects the displacement transducer outside described upper chamber by the connecting shaft crossing described upper chamber.
3. the rotary compressor leakage characteristics test system of stroboscopic method is triggered as claimed in claim 2 based on phase place, it is characterised in that: described bottom chamber is provided with sealing fluid, and this sealing fluid is same with the storage liquid phase in described liquid dispensing device；Described check (non-return) valve is connected with described lower chambers by non-return pipeline, and this non-return pipeline is positioned in described sealing fluid with the connection end of described lower chambers.
4. the rotary compressor leakage characteristics test system of stroboscopic method is triggered as claimed in claim 3 based on phase place, it is characterised in that: described lower chambers is provided with vent valve；The blowdown piping that described vent valve connects with lower chambers stretches into described lower chambers, and the blowdown piping opening of described bottom chamber is positioned at above described sealing fluid.
5. the rotary compressor leakage characteristics test system of stroboscopic method is triggered as claimed in claim 2 based on phase place, it is characterised in that: described controlling valve is threeway controlling valve, is also associated with noise elimination fog-dissipation device simultaneously；Described controlling valve is connected with central controller.
6. the rotary compressor leakage characteristics test system of stroboscopic method is triggered as claimed in claim 2 based on phase place, it is characterised in that: described high pressure gas holder is connected with constant-pressure tank by regulation valve, and described constant-pressure tank is connected with described temperature controller again.
7. the rotary compressor leakage characteristics test system of stroboscopic method is triggered as claimed in claim 2 based on phase place, it is characterised in that: described central controller is also connected with described pressure proportional deployment valve and temperature controller.
8. the rotary compressor leakage characteristics test system of stroboscopic method is triggered as claimed in claim 2 based on phase place, it is characterised in that: described high pressure gas holder is all connected by valve with described back pressure tank and source of the gas compressor.
9. the rotary compressor leakage characteristics test system of stroboscopic method is triggered as claimed in claim 2 based on phase place, it is characterised in that: described photographing unit be arranged in parallel with compressor drum axis, and its camera lens faces described end cap.
10. the rotary compressor leakage characteristics test system of stroboscopic method is triggered as claimed in claim 6 based on phase place, it is characterised in that: described high pressure gas holder, constant-pressure tank, back pressure tank, high pressure chest entrance, the upper chamber measuring cylinder and lower chambers are respectively connected with Pressure gauge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620384140.8U CN205654540U (en) | 2016-04-29 | 2016-04-29 | Rotary compressor leaks characteristic test system based on phase place triggers stroboscopic method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620384140.8U CN205654540U (en) | 2016-04-29 | 2016-04-29 | Rotary compressor leaks characteristic test system based on phase place triggers stroboscopic method |
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| CN205654540U true CN205654540U (en) | 2016-10-19 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105805010A (en) * | 2016-04-29 | 2016-07-27 | 广西大学 | Rotary compressor leakage character testing system based on phase trigger stroboscopic method |
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2016
- 2016-04-29 CN CN201620384140.8U patent/CN205654540U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105805010A (en) * | 2016-04-29 | 2016-07-27 | 广西大学 | Rotary compressor leakage character testing system based on phase trigger stroboscopic method |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161019 Termination date: 20190429 |