CN105087886B - A kind of preparation method of rotating air conditioner compressor blade - Google Patents
A kind of preparation method of rotating air conditioner compressor blade Download PDFInfo
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Abstract
The present invention relates to a kind of preparation method of rotating air conditioner compressor blade, belong to compressor field of material technology.In order to solve the problem of existing blade is using rear low precision, a kind of preparation method of rotating air conditioner compressor blade is provided, this method includes the size according to rotating air conditioner compressor blade, chooses Steel material and carries out roughing, obtains corresponding blade blank；Obtained blank is subjected to vacuum hardening processing, after vacuum hardening processing terminates, first time temper is carried out；After first time temper terminates, blade blank is put into cryogenic treatment apparatus and carries out subzero treatment；After subzero treatment terminates, then temper at least one times is carried out, then, finished, obtain finished product rotating air conditioner compressor blade.Can effectively the avoiding of the present invention makes blade volume size change and influences precision because excessive retained austenite exists and is converted into martensite, ensure that the precision effect and service life and efficiency of blade.
Description
Technical field
The present invention relates to a kind of preparation method of rotating air conditioner compressor blade, belong to compressor field of material technology.
Background technology
Rotating air conditioner compressor is to be contacted using the arc surface of blade tip with piston face, divide the cylinder into two it is close
Closed region, band piston is rotated together when bent axle rotates, and the change rotated by closed area with piston is continuously inhaled
Gas-compression-exhaust, completes the working cycles of whole compressor.It is right with requiring to improve constantly to environmental protection, energy-conservation and consumption reduction
The Energy Efficiency Ratio of compressor proposes higher and higher require.To reduce blade and the leakage of piston when rotated, blade and cylinder
Fit precision, blade and the fit precision between cylinder cap is further improved up and down, blade precision itself is also improved therewith, due to rotation
Formula air conditioning compressor blade is machining accuracy highest part in such compressor, its thickness tolerance, width dimensions tolerance,
The requirement such as the depth of parallelism, perpendicularity, arc generatrix linearity all reaches " μ " level, is typically the μ of 3 μ~5, processing technology it is complicated plus
Work difficulty is very big, arranges people's new high-tech product by country.And high-precision compressor is by improving the manufacture of Parts of Compressor
Precision and assembly precision, reduce leakage to improve Energy Efficiency Ratio；And assembly precision is by the μ of 8 original μ~12, the μ of 4 μ~8 is brought up to.Rotation
The high product of rotatable air conditioning compressor blade originally precision, thickness, the width of current High Precision Air-conditioning compressor blade
Dimensional tolerance, the depth of parallelism, the synthesis precision of flatness be further improved to 2 μ, manufacture difficulty further increases.And it is actual
In assembling, the big multi-disc of blade is using the tissue production of packet apolegamy mode.But the stall for the compressor that after mounting, occurs now and then, just
" being grouped by mistake ", " by mistake across group " when step analysis is probably blade assembling have impact on compressor assembling.Although strengthening detection supervision,
But can not effect a radical cure.On the other hand, also it is due to mainly that production is made due to internal thaumatropy after product is used for a long time
Volume or precision of product etc. produce the phenomenon for changing and making and stall occur.Such as Chinese patent application (publication number：
CN102410225A a kind of preparation method of compressor blade) is disclosed, this method by the base material of selection by carrying out roughing
After carry out Tempering and Quenching, the condition of Tempering and Quenching is to carry out oil quenchings at 920 DEG C~940 DEG C, then high at 580 DEG C~650 DEG C
Temperature tempering, then carries out air cooling processing, then after finishing, carries out Nitrizing Treatment, obtain the blade of high rigidity.Although it is by oozing
The intensity and hardness performance of compressor blade can be improved after nitrogen processing, reduces the influence caused by the factors such as friction to improve
The quality and service life of blade, but due to by quenching with also exist after temper a certain amount of retained austenite into
Point, on the contrary can be to martensitic transformation with the passage of use time, and make to occur in that Volume Changes have impact on blade in phase transformation
Fine dimension changes, and reduces precision of blades, so that the problems such as causing compressor " stall " phenomenon.
The content of the invention
There is provided a kind of preparation of rotating air conditioner compressor blade for above problems of the prior art by the present invention
The problem of method, solution is how to improve rotating air conditioner compressor precision of blades effect.
The purpose of the present invention technical scheme is that, a kind of system of rotating air conditioner compressor blade
Preparation Method, this method comprises the following steps：
A, the size according to rotating air conditioner compressor blade, choose Steel material and carry out roughing, obtain corresponding
Blade blank；
B, by obtained blank carry out vacuum hardening processing, after vacuum hardening processing terminates, carry out first time temper；
After first time temper terminates, blade blank is put into cryogenic treatment apparatus and carries out subzero treatment；
After C, subzero treatment terminate, then temper at least one times is carried out, then, finished, obtain finished product rotation
Formula air conditioning compressor blade.
The preparation method of rotating air conditioner compressor blade of the present invention, in order to solve because Steel material blade is being only passed through
Also there is a certain amount of retained austenite composition after quenching and temper, on the contrary can be to geneva with the passage of use time
Body is converted, and makes the fine dimension change for occurring in that Volume Changes have impact on blade in phase transformation, so as to cause compressor " stall "
Phenomenon, the present inventor is by the discovery that studies for a long period of time, due to by after vacuum hardening, thermal stress is very big, therefore, it is necessary to first pass through
Temper reaches the effect of destressing, so as to realize the strength character for ensureing compressor blade, then, then through too deep
Cold treatment purpose be in order to reduce the content of retained austenite in compressor blade, improve the content ratio of martensite, so as to
It is enough effective to solve to make blade interior undergo phase transition phenomenon because over time and blade Volume Changes occur, precision drop
Low defect, it is ensured that the high-precision effect of compressor blade of the invention, it is residual in compressor blade after subzero treatment
The content of remaining low body difficult to understand can be at least reduced within 2%；Then, then by temper at least one times it can effectively prevent depth
The internal stress produced in cold-treating process, reaches the effect for more effectively removing internal stress, it is ensured that the performance of product.
In the preparation method of above-mentioned rotating air conditioner compressor blade, preferably, subzero treatment described in step B
Temperature is -160 DEG C~-100 DEG C.Purpose is to further improve the content ratio of martensite in rotating air conditioner compressor blade
Example, reduces the content ratio of retained austenite, can make the content ratio of retained austenite in rotating air conditioner compressor blade
It is reduced within 1%.As further preferably, subzero treatment is specially described in step B：First pass through the side of indirect heat transfer
Formula makes greenhouse cooling to -60 DEG C~-40 DEG C, then, then directly liquid nitrogen is passed through in cryogenic treatment apparatus make greenhouse cooling to -
160 DEG C~-100 DEG C carry out subzero treatment 2~4 hours.Purpose be in order to avoid the too fast internal stress for causing blade of cooling increases,
Internal stress produces excessive, the follow-up temper process of reduction during subzero treatment can effectively be prevented, both simplifies technique
Operation, can effectively realize energy-saving effect again.
In the preparation method of above-mentioned rotating air conditioner compressor blade, Steel material described in step A uses high speed steel
Material, preferably, Steel material described in step A is selected from W6Cr5Mo4V2 high-speed steel or W18Cr4V high-speed steel.Using these
High speed steel material not only has preferable wearability, and itself also has preferable red hardness energy, advantageously ensures that the matter of product
Measure performance.
In the preparation method of above-mentioned rotating air conditioner compressor blade, preferably, described in step B at vacuum hardening
The temperature of reason is 1000 DEG C~1300 DEG C.By high temperature Quenching Treatment purpose in order that the internal organizational structure in high-speed steel is to horse
Family name's body is converted, and improves the content ratio of martensite.
In the preparation method of above-mentioned rotating air conditioner compressor blade, preferably, being tempered for the first time described in step B
The temperature of processing is 500 DEG C~600 DEG C.By high tempering processing intent in order in removing and producing during vacuum hardening
Stress, improves the strength character of product.
In the preparation method of above-mentioned rotating air conditioner compressor blade, preferably, being returned at least one times described in step C
Fiery number of processing is three times, and the temperature of temper is 500 DEG C~600 DEG C, the time 1.0~2.0 of temper every time
Hour.It is combined by multiple temper with subzero treatment, while ensure that residual austenite content in reduction blade
The internal stress effectively removed in blade can be realized again, it is ensured that strength character.
In summary, the present invention compared with prior art, with advantages below：
The preparation method of the rotating air conditioner compressor blade of the present invention, is mutually tied by multiple temper with subzero treatment
Close, the content ratio of retained austenite in blade is reduced within 2% so that effectively avoid in use because
Excessive retained austenite, which exists, to be converted into martensite and makes the problem of blade volume size changes and influences precision, can
Ensure the precision effect of the rotating air conditioner compressor blade of the present invention, improve the service life and efficiency of compressor.
Embodiment
Embodiment 1
Required, from suitable section bar, used in the present embodiment according to the size of rotating air conditioner compressor blade
W18Cr4V high speed steel profiles, can use cold rolling or hot rolling W18Cr4V high speed steel materials, to the W18Cr4V high-speed steel of selection
Surface of profile is deoiled, decontamination processing, is then rushed clear clean with water again, after drying, is then carried out roughing, is processed into corresponding
Rotating air conditioner compressor blade blank；Obtained blade blank is put into vacuum quencher again and carried out and by temperature control
Vacuum hardenings are carried out at 1000 DEG C to handle 30 minutes, after vacuum hardening processing terminates, after being cooled down by the way of the air cooling, so
Afterwards, rotating air conditioner compressor blade blank is transferred to first time temper in tempering furnace, the temperature of first time temper
Spend for 500 DEG C, the time of temper is 2.5 hours；After temper terminates, carried out with 5 DEG C/min~10 DEG C/min speed
Cooling processing is cooled to room temperature, and rotating air conditioner compressor blade blank is put into cryogenic treatment apparatus, first passed through at deep cooling
The heat transfer pipe in device is managed, and using liquid nitrogen as coolant, the mode cooled indirectly makes the temperature in cryogenic treatment apparatus
Degree is cooled to -60 DEG C, and cooling rate is 5 DEG C/min~8 DEG C/min, then, then directly liquid nitrogen is passed through in cryogenic treatment apparatus
Make the temperature in cryogenic treatment apparatus continue to be cooled to -100 DEG C, and maintain the temperature at -100 DEG C to carry out subzero treatment 2 hours, it is deep
After cold treatment terminates, room temperature is warming up to, the rotating air conditioner compressor blade blank Jing Guo subzero treatment is taken out and is placed again into back
Three tempers are carried out in stove, the temperature of each temper is 550 DEG C, and the time of temper is 1.0 hours, three
After secondary temper terminates, finishing processing is carried out, finished product rotating air conditioner compressor blade is obtained.
Embodiment 2
Required, from suitable section bar, used in the present embodiment according to the size of rotating air conditioner compressor blade
W6Cr5Mo4V2 high speed steel profiles, can use cold rolling or hot rolling W6Cr5Mo4V2 high speed steel materials, to selection
W6Cr5Mo4V2 high-speed steel Surface of profile is deoiled, decontamination processing, is then rushed clear clean with water again, after drying, is then carried out
Roughing, is processed into corresponding rotating air conditioner compressor blade blank；Obtained blade blank is put into vacuum quencher again
Temperature control is simultaneously carried out vacuum hardening processing 25 minutes at 1300 DEG C by middle progress, after vacuum hardening processing terminates, using air cooling
Mode cooled down after, then, rotating air conditioner compressor blade blank is transferred to first time temper in tempering furnace,
The temperature of first time temper is 600 DEG C, and the time of temper is 2.0 hours；After temper terminates, with 5 DEG C/
Min~10 DEG C/min speed carries out cooling processing and is cooled to room temperature, and rotating air conditioner compressor blade blank is put at deep cooling
Manage in device, first pass through the heat transfer pipe in cryogenic treatment apparatus, and using liquid nitrogen as coolant, the mode cooled indirectly
Make the greenhouse cooling in cryogenic treatment apparatus to -40 DEG C, cooling rate is 5 DEG C/min~8 DEG C/min, then, then directly by liquid
Nitrogen, which is passed through, makes the temperature in cryogenic treatment apparatus continue to be cooled to -160 DEG C in cryogenic treatment apparatus, and maintains the temperature at -160 DEG C
Subzero treatment 3.0 hours is carried out, after subzero treatment terminates, room temperature is warming up to, takes out the rotary air conditioner pressure Jing Guo subzero treatment
Contracting machine blade blank, which is placed again into tempering furnace, carries out three tempers, and the temperature of each temper is 600 DEG C, and tempering
The time of processing is 2.0 hours, after three times temper terminates, and carries out finishing processing, obtains the compression of finished product rotary air conditioner
Machine blade.
Embodiment 3
Required, from suitable section bar, used in the present embodiment according to the size of rotating air conditioner compressor blade
W6Cr5Mo4V2 high speed steel profiles, can use cold rolling or hot rolling W6Cr5Mo4V2 high speed steel materials, to selection
W6Cr5Mo4V2 high-speed steel Surface of profile is deoiled, decontamination processing, is then rushed clear clean with water again, after drying, is then carried out
Roughing, is processed into corresponding rotating air conditioner compressor blade blank；Obtained blade blank is put into vacuum quencher again
Temperature control is simultaneously carried out vacuum hardening processing 20 minutes at 1100 DEG C by middle progress, after vacuum hardening processing terminates, using air cooling
Mode cooled down after, then, rotating air conditioner compressor blade blank is transferred to first time temper in tempering furnace,
The temperature of first time temper is 550 DEG C, and the time of temper is 1.5 hours；After temper terminates, with 5 DEG C/min
~10 DEG C/min speed carries out cooling processing and is cooled to room temperature, and rotating air conditioner compressor blade blank is put into subzero treatment dress
In putting, the heat transfer pipe in cryogenic treatment apparatus is first passed through, and using liquid nitrogen as coolant, the mode cooled indirectly makes depth
Greenhouse cooling in cold treatment device is to -50 DEG C, and cooling rate is 5 DEG C/min~8 DEG C/min, then, then is directly led to liquid nitrogen
Enter to make in cryogenic treatment apparatus the temperature in cryogenic treatment apparatus to continue to be cooled to -120 DEG C, and maintain the temperature at -120 DEG C of progress
Subzero treatment 2.5 hours, after subzero treatment terminates, is warming up to room temperature, takes out the rotating air conditioner compressor Jing Guo subzero treatment
Blade blank, which is placed again into tempering furnace, carries out double tempering processing, and the temperature of each temper is 500 DEG C, and temper
Time be 3.0 hours, after double tempering processing terminates, carry out finishing processing, obtain finished product rotating air conditioner compressor leaf
Piece.
Embodiment 4
Required, from suitable section bar, used in the present embodiment according to the size of rotating air conditioner compressor blade
W18Cr4V high speed steel profiles, can use cold rolling or hot rolling W18Cr4V high speed steel materials, to the W18Cr4V high-speed steel of selection
Surface of profile is deoiled, decontamination processing, is then rushed clear clean with water again, after drying, is then carried out roughing, is processed into corresponding
Rotating air conditioner compressor blade blank；Obtained blade blank is put into vacuum quencher again and carried out and by temperature control
Vacuum hardenings are carried out at 1200 DEG C to handle 30 minutes, after vacuum hardening processing terminates, after being cooled down by the way of the air cooling, so
Afterwards, rotating air conditioner compressor blade blank is transferred to first time temper in tempering furnace, the temperature of first time temper
Spend for 580 DEG C, the time of temper is 2.0 hours；After temper terminates, carried out with 5 DEG C/min~10 DEG C/min speed
Cooling processing is cooled to room temperature, and rotating air conditioner compressor blade blank is put into cryogenic treatment apparatus, first passed through at deep cooling
The heat transfer pipe in device is managed, and using liquid nitrogen as coolant, the mode cooled indirectly makes the temperature in cryogenic treatment apparatus
Degree is cooled to -55 DEG C, and cooling rate is 5 DEG C/min~8 DEG C/min, then, then directly liquid nitrogen is passed through in cryogenic treatment apparatus
Make the temperature in cryogenic treatment apparatus continue to be cooled to -130 DEG C, and maintain the temperature at -130 DEG C to carry out subzero treatment 2.0 hours,
After subzero treatment terminates, room temperature is warming up to, the rotating air conditioner compressor blade blank Jing Guo subzero treatment is taken out and is placed again into
Double tempering processing is carried out in tempering furnace, the temperature of each temper is 530 DEG C, and the time of temper is 2.0 every time
Hour, after double tempering processing terminates, finishing processing is carried out, finished product rotating air conditioner compressor blade is obtained.
Embodiment 5
Required, from suitable section bar, used in the present embodiment according to the size of rotating air conditioner compressor blade
W18Cr4V high speed steel profiles, can use cold rolling or hot rolling W18Cr4V high speed steel materials, to the W18Cr4V high-speed steel of selection
Surface of profile is deoiled, decontamination processing, is then rushed clear clean with water again, after drying, is then carried out roughing, is processed into corresponding
Rotating air conditioner compressor blade blank；Obtained blade blank is put into vacuum quencher again and carried out and by temperature control
Vacuum hardenings are carried out at 1050 DEG C to handle 40 minutes, after vacuum hardening processing terminates, after being cooled down by the way of the air cooling, so
Afterwards, rotating air conditioner compressor blade blank is transferred to first time temper in tempering furnace, the temperature of first time temper
Spend for 510 DEG C, the time of temper is 3.0 hours；After temper terminates, carried out with 5 DEG C/min~10 DEG C/min speed
Cooling processing is cooled to room temperature, and rotating air conditioner compressor blade blank is put into cryogenic treatment apparatus, first passed through at deep cooling
The heat transfer pipe in device is managed, the pipe diameter of the outlet of the inlet tube of the heat transfer pipe coolant to coolant is in gradually
The design of increase, makes liquid nitrogen vaporization by the change of heat transfer pipe caliber, the form of heat of vaporization is released, so as to be prevented effectively from
The too fast increase for causing blade internal stress of cooling, and using liquid nitrogen as coolant, the mode cooled indirectly makes subzero treatment
Greenhouse cooling in device is to -45 DEG C, and cooling rate is 5 DEG C/min~8 DEG C/min, then, then liquid nitrogen directly is passed through into deep cooling
Make the temperature in cryogenic treatment apparatus continue to be cooled to -110 DEG C in processing unit, and maintain the temperature at -110 DEG C of progress deep coolings
Reason 3.0 hours, after subzero treatment terminates, is warming up to room temperature, takes out the rotating air conditioner compressor blade base Jing Guo subzero treatment
Material, which is placed again into tempering furnace, carries out three tempers, and the temperature of each temper is 540 DEG C, and each temper
Time is 2.0 hours, after three times temper terminates, and carries out finishing processing, obtains finished product rotating air conditioner compressor blade.
Embodiment 6
Required, from suitable section bar, used in the present embodiment according to the size of rotating air conditioner compressor blade
W18Cr4V high speed steel profiles, can use cold rolling or hot rolling W18Cr4V high speed steel materials, to the W18Cr4V high-speed steel of selection
Surface of profile is deoiled, decontamination processing, is then rushed clear clean with water again, after drying, is then carried out roughing, is processed into corresponding
Rotating air conditioner compressor blade blank；Obtained blade blank is put into vacuum quencher again and carried out and by temperature control
Vacuum hardenings are carried out at 1250 DEG C to handle 1.0 minutes, after vacuum hardening processing terminates, after being cooled down by the way of the air cooling,
Then, rotating air conditioner compressor blade blank is transferred to first time temper in tempering furnace, first time temper
Temperature is 560 DEG C, and the time of temper is 2.0 hours；After temper terminates, entered with 5 DEG C/min~10 DEG C/min speed
Row cooling processing is cooled to room temperature, and rotating air conditioner compressor blade blank is put into cryogenic treatment apparatus, deep cooling is first passed through
Heat transfer pipe in processing unit, the pipe diameter of the outlet of the inlet tube of the heat transfer pipe coolant to coolant be in by
Cumulative big design, makes liquid nitrogen vaporization by the change of heat transfer pipe caliber, the form of heat of vaporization is released, so as to effectively keep away
Exempt from the too fast increase for causing blade internal stress that cools, and using liquid nitrogen as coolant, the mode cooled indirectly makes at deep cooling
The greenhouse cooling in device is managed to -50 DEG C, cooling rate is 5 DEG C/min~8 DEG C/min, then, then liquid nitrogen directly is passed through into depth
Make the temperature in cryogenic treatment apparatus continue to be cooled to -120 DEG C in cold treatment device, and maintain the temperature at -120 DEG C of progress deep coolings
Processing 2.0 hours, after subzero treatment terminates, is warming up to room temperature, takes out the rotating air conditioner compressor blade Jing Guo subzero treatment
Blank, which is placed again into tempering furnace, carries out three tempers, and the temperature of each temper is 550 DEG C, and temper every time
Time be 2.0 hours, after three times temper terminates, carry out finishing processing, obtain finished product rotating air conditioner compressor leaf
Piece.
Randomly select the rotating air conditioner compressor blade that above-described embodiment 1-6 obtains and carry out corresponding performance survey respectively
Examination, by macrocyclic test, ensure that change in size<0.001mm, can meet the performance needs of compressor, and without
The blade of subzero treatment, in long period test, change in size is more than 0.003mm~more than 0.005mm.After long-term use
Test result show, precision of the invention still be able to keep, be substantially not in Volume Changes after long-time use
Phenomenon, using on the compressor, being less prone to stall phenomenon.
Specific embodiment described in the present invention is only to spirit explanation for example of the invention.Technology neck belonging to of the invention
The technical staff in domain can be made various modifications or supplement to described specific embodiment or be replaced using similar mode
Generation, but without departing from the spiritual of the present invention or surmount scope defined in appended claims.
It is skilled to this area although having been made a detailed description to the present invention and being cited some specific embodiments
For technical staff, as long as it is obvious that can make various changes or correct without departing from the spirit and scope of the present invention.
Claims (4)
1. a kind of preparation method of rotating air conditioner compressor blade, it is characterised in that this method comprises the following steps：
A, required according to the size of rotating air conditioner compressor blade, choose Steel material and carry out roughing, obtain corresponding
Rotating air conditioner compressor blade blank；The Steel material is selected from W6Cr5Mo4V2 high-speed steel or W18Cr4V high-speed steel；
B, by obtained blank carry out vacuum hardening processing, after vacuum hardening processing terminates, carry out first time temper；First
After secondary temper terminates, blade blank is put into cryogenic treatment apparatus and carries out subzero treatment；The subzero treatment is specially：
First passing through the mode cooled indirectly makes greenhouse cooling to -60 DEG C~-40 DEG C, then, then directly liquid nitrogen is passed through at deep cooling
Extremely -160 DEG C~-100 DEG C of greenhouse cooling is set to carry out subzero treatment 2~4 hours in reason device；Make retained austenite in blade blank
Content within 1%；
After C, subzero treatment terminate, then temper at least one times is carried out, then, finished, obtain finished product rotatably empty
Adjust compressor blade.
2. the preparation method of rotating air conditioner compressor blade according to claim 1, it is characterised in that described in step B
The temperature of vacuum hardening processing is 1000 DEG C~1300 DEG C.
3. the preparation method of rotating air conditioner compressor blade according to claim 1, it is characterised in that described in step B
The temperature of first time temper is 500 DEG C~600 DEG C.
4. the preparation method of rotating air conditioner compressor blade, is tempered at least one times described in step C according to claim 1
Number of processing is three times, and the temperature of temper is 500 DEG C~600 DEG C every time, and the time 1.0~2.0 of temper is small
When.
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| CN105382503B (en) * | 2015-12-17 | 2018-06-29 | 沈阳鼓风机集团齿轮压缩机有限公司 | A kind of processing method and device of suction port of compressor guide vane |
| CN107326265A (en) * | 2017-07-06 | 2017-11-07 | 浙江百达精工股份有限公司 | The tempering method for treating of rotating air conditioner compressor slide plate and slide plate |
| CN107447085A (en) * | 2017-08-19 | 2017-12-08 | 成都市联余精密机械有限公司 | A kind of curve special forming parts position Light deformation controls Technology for Heating Processing |
| EP3502302B1 (en) * | 2017-12-22 | 2022-03-02 | Ge Avio S.r.l. | Nitriding process for carburizing ferrium steels |
| CN109971926B (en) * | 2019-03-05 | 2021-03-02 | 沈阳透平机械股份有限公司 | Heat treatment method of ultralow-temperature high-strength steel for compressor |
| CN111441011A (en) * | 2020-04-13 | 2020-07-24 | 河北太行机械工业有限公司 | Nitriding treatment process for high-speed steel tool |
| CN111850244A (en) * | 2020-07-31 | 2020-10-30 | 滁州市汊河之星高新技术研发有限公司 | Preparation method of heat pump electric automobile air conditioner compressor blade |
| CN111774573A (en) * | 2020-08-06 | 2020-10-16 | 滁州市汊河之星高新技术研发有限公司 | Manufacturing method of suction valve plate of vortex type automobile air conditioner compressor |
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