CN106438353B - Screw compressor and its scroll plate, air-conditioning equipment and motor device - Google Patents
Screw compressor and its scroll plate, air-conditioning equipment and motor device Download PDFInfo
- Publication number
- CN106438353B CN106438353B CN201610766942.XA CN201610766942A CN106438353B CN 106438353 B CN106438353 B CN 106438353B CN 201610766942 A CN201610766942 A CN 201610766942A CN 106438353 B CN106438353 B CN 106438353B
- Authority
- CN
- China
- Prior art keywords
- scroll
- plate
- wear plate
- disk body
- gas vent
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
- F04C18/02—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
- F04C18/0207—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents both members having co-operating elements in spiral form
- F04C18/0215—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents both members having co-operating elements in spiral form where only one member is moving
- F04C18/0223—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents both members having co-operating elements in spiral form where only one member is moving with symmetrical double wraps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2240/00—Components
- F04C2240/80—Other components
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2270/00—Control; Monitoring or safety arrangements
- F04C2270/17—Tolerance; Play; Gap
- F04C2270/175—Controlled or regulated
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Rotary Pumps (AREA)
Abstract
The invention discloses a kind of screw compressor and its scroll plate, air-conditioning equipment and motor device, scroll plate includes:Disk body and scroll wrap from one surface bulge of disk body;Disk body is provided with gas vent;Scroll wrap forms swirler passages, for placing wear plate;Correspondence gas vent one end of swirler passages is equipped with step, step and wear plate complementation docking.In the above manner, present invention decreases the possibility of wear plate fracture and deformation, the design freedom bigger of the size and location of gas vent prevents high pressure chest working medium premature leakage, lower power consumption, Energy Efficiency Ratio from improving.
Description
Technical field
The present invention relates to machinery fields, more particularly to a kind of screw compressor and its scroll plate, air-conditioning equipment and machine
Dynamic equipment.
Background technology
On air conditioning for automobiles electric scroll compressor, usually, the vortex crest top land of orbiter and quiet vortex in order to prevent
Disk scroll wrap bottom surface is worn, and can place a wear plate, referred to as fixed scroll wear plate in fixed scroll scroll wrap bottom surface.
Wear plate in the prior art in design, arranged by the length and shape on the head (vortex higher-pressure region) of wear plate
The limitation of pore opening and position, design freedom are low.
It when the head of fixed scroll wear plate is long, is influenced by gas vent, head width is smaller, becomes long and narrow, practical
It is susceptible to fracture when operation or scratches orbiter.
When the head of fixed scroll wear plate is too short, although being unlikely to occur being broken or scratch orbiter, because wear-resisting
Sheet head is too short, and a clear area is formd between orbiter top surface and fixed scroll bottom surface, high with the movement of Moving plate
The working medium premature leakage for pressing chamber is equivalent to orbiter with respect to the too early drop out of gear of fixed scroll, i.e., practical clearance volume increases, repeatedly
Power consumption caused by compression increases, and Energy Efficiency Ratio declines.
Invention content
An embodiment of the present invention provides a kind of screw compressor and its scroll plate, air-conditioning equipment and motor devices, reduce
The possibility of wear plate fracture and deformation, the design freedom bigger of the size and location of gas vent prevent high pressure chest working medium mistake
Early leakage, lower power consumption, Energy Efficiency Ratio improve.
The present invention provides a kind of scroll plate of screw compressor, including:Disk body and scroll wrap from one surface bulge of disk body;
Disk body is provided with gas vent;Scroll wrap forms swirler passages, for placing wear plate;Correspondence gas vent one end of swirler passages is set
There are step, step and wear plate complementation docking.
Wherein, step at least extends to the whirlpool for being paved with another scroll plate from close wear plate one end towards close gas vent direction
Revolve a part for the movement institute area coverage of tooth.
Wherein, on the basis of disc surfaces, step height is equal to or less than the thickness of wear plate.
Wherein, step is integrally formed with disk body.
Wherein, step is a part for the separation of wear plate.
Wherein, step is towards the end face of wear plate and step towards being round and smooth between the surface of the scroll wrap of another scroll plate
Transition.
Wherein, scroll plate is fixed scroll.
The present invention also provides a kind of screw compressors, including scroll plate above-mentioned.
The present invention also provides a kind of air-conditioning equipments, including screw compressor above-mentioned.
The present invention also provides a kind of motor devices, including air-conditioning equipment above-mentioned.
Through the above scheme, the beneficial effects of the invention are as follows:The scroll plate of screw compressor of the present invention includes:Disk body and
From the scroll wrap of one surface bulge of disk body;Disk body is provided with gas vent;Scroll wrap forms swirler passages, for placing wear plate;
Correspondence gas vent one end of swirler passages is equipped with step, step and wear plate complementation docking, reduces wear plate fracture and deformation
Possibility, the design freedom bigger of the size and location of gas vent prevents high pressure chest working medium premature leakage, lower power consumption, energy
Effect is than improving.
Description of the drawings
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for
For those of ordinary skill in the art, without creative efforts, other are can also be obtained according to these attached drawings
Attached drawing.Wherein:
Fig. 1 is the shaft section structural schematic diagram of the screw compressor of the embodiment of the present invention;
Fig. 2 is the positive structure schematic of the fixed scroll of the embodiment of the present invention, wherein also showing wear plate;
Fig. 3 is the schematic diagram of Section A-A in Fig. 2;
Fig. 4 is the structural schematic diagram of the wear plate of the embodiment of the present invention;
Fig. 5 is the structural schematic diagram of region B in Fig. 2;
Fig. 6 is that the structure of gas vent near zone when the first scroll plate of the embodiment of the present invention coordinates with the second scroll plate is shown
It is intended to.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, rather than whole embodiments.Based on this
Embodiment in invention, those of ordinary skill in the art are obtained every other under the premise of not making performing creative labour
Embodiment shall fall within the protection scope of the present invention.
It is the structural schematic diagram of the screw compressor of the embodiment of the present invention referring to Fig. 1-5, Fig. 1, Fig. 2 is the embodiment of the present invention
Fixed scroll structural schematic diagram.Screw compressor includes:First scroll plate 2, the second scroll plate 4 and wear plate 3.Wherein
The signified part of label 1 is the rear cover of screw compressor.First scroll plate 2 includes the first disk body 210 and from 210 1 table of the first disk body
First scroll wrap 211 of face protrusion.Second scroll plate 4 include the second disk body 410 and from 410 1 surface bulge of the second disk body the
Two scroll wraps 411.First scroll wrap 211 and the second scroll wrap 411 are equipped with.First disk body 210 is provided through the first disk
The gas vent 213 of body 210;Wear plate 3 is placed in the first scroll wrap 211 and is formed by swirler passages, the corresponding row of swirler passages
Stomata one end be equipped with step 214, step 214 and the complementary docking of wear plate 3 with prevent by compressed object from the second scroll wrap 411 with
It is leaked between wear plate 3.
In embodiments of the present invention, screw compressor further includes:Eccentric wheel 5, bearing block 6, base bearing 7, motor casing 8, master
Axis 9, motor 10, drive control device 11 and auxiliary bearing 12.It is not shown in concrete structure Fig. 1 of drive control device 11.Motor 10
It is installed on motor casing 8 with drive control device 11, motor 10 and main shaft 9 form motor part, and main shaft 9 is installed on base bearing 7 and auxiliary
On bearing 12, base bearing 7 is arranged on bearing block 6.Wherein, air inlet is located at the motor rightmost side, and 10 part of motor is ventilative
, there is a hole to may be coupled to the outermost vortex track of the second scroll plate 4 on bearing block 6.Drive control device 11 provides
When rotation work instructs, main shaft 9 rotates, and then is moved with movable eccentric wheel 5 and the second scroll plate 4.Second scroll plate 4 opposite first
Scroll plate 2 is translatable, and has the scroll wrap of vortex shape in the second scroll plate 4 and the first scroll plate 2, is moved in the second scroll plate 4
When, the first scroll wrap 211 and the intermeshing of the second scroll wrap 411 pass sequentially through air inlet, motor 10, the hole on bearing block 6
And second scroll plate 4 vortex track suck low-temp low-pressure working medium.As the second scroll plate 4 moves, low-temp low-pressure working medium
Volume is gradually compressed diminution.When the second scroll plate 4 reaches end of travel, that is, gas vent, working medium is compressed to the first scroll plate
2 middle sections eventually become high temperature and pressure working medium and are discharged from the gas vent 213 of the first scroll plate 2.
In addition, the screw compressor of the embodiment of the present invention can be integral type screw compressor, drive control device 11 is installed
On motor casing 8;Can also be split type screw compressor, i.e., drive control device 11 is an independent component, is not resided at
On motor casing 8.
In embodiments of the present invention, referring to Fig. 3, on the basis of 210 surface of the first disk body, 214 height m of step is equal to or small
In the thickness of wear plate 3.In design, step 214 can be integrally formed with the first disk body 210, can also be and the first disk body
210 split settings, as long as step 214 can be securely fixed in correspondence gas vent one end of swirler passages.It is making
When making, step 214 can be a part for the separation of wear plate 3.I.e. step 214 can be as wear plate 3 a part with
Wear plate 3 manufactures together, is separated into the step 214 and wear plate 3 of needs after finalization of the manufacture, can so ensure in assembly
Step 214 can progress complementation be docked well and thickness is almost the same with wear plate 3.Certainly, in other implementations of the present invention
In example, step 214 and wear plate 3 manufacture respectively, can ensure end surface shape and wear plate 3 of the step 214 towards wear plate 3
End surface shape towards step 214 being capable of complementation.
In other embodiments, table of the step 214 towards the end face of wear plate 3 and step 214 towards the second scroll wrap 411
It is rounding off between face, to prevent the second scroll wrap 411 in the motion process coordinated with the first scroll wrap 211, the second whirlpool
Rotation tooth 411 occurs friction with step 214 and the second scroll wrap 411 and/or step 214 is caused to damage.
In embodiments of the present invention, the structure of gas vent near zone is joined when the first scroll plate 2 and the second scroll plate 4 coordinate
See Fig. 6, after the completion of the second scroll wrap 411 and the cooperation of the first scroll wrap 211, the second scroll wrap 411 and the first scroll wrap 211 and
Gas vent 213 surrounds high pressure chest 13.Step 214 is at least extended to from close 3 one end of wear plate towards close gas vent direction and is paved with
A part for the movement institute area coverage of second scroll wrap 411.Referring specifically to Fig. 6, step 214 includes at least 214 institutes in Fig. 6
The part in the region of instruction.Certain step 214 can also be paved with the region in Fig. 6 indicated by 214.Aforementioned predetermined condition refers to
Two scroll wraps 411 are vented hole site in rotation to end of travel.
In another application scenarios, step 214 covers the first scroll wrap 211, wear plate 3 and gas vent 213 and is surrounded
Region.In this way, the clear area formed between 2 bottom surface of 4 top surface of the second scroll plate and the first scroll plate is filled, high pressure chest 13
Working medium will not premature leakage, lower power consumption, Energy Efficiency Ratio improve.
In embodiments of the present invention, the first scroll plate 2 is fixed scroll, and the second scroll plate 4 is orbiter.Step 214
Setting make the wear-resisting sheet head of fixed scroll need not excessively extend and it is long and narrow, reduce wear plate fracture and deformation possibility,
And orbiter is not scratched, the design freedom bigger of the size and location of gas vent;Prevent high pressure chest working medium premature leakage, work(
Consumption reduces, and Energy Efficiency Ratio improves.
The present invention also provides a kind of air-conditioning equipments, including screw compressor above-mentioned.
The present invention also provides a kind of motor devices, including air-conditioning equipment above-mentioned.
Referring to Fig. 2-5, the present invention also provides a kind of scroll plates of screw compressor.Scroll plate 2 includes:Disk body 210 and from
The scroll wrap 211 of 210 1 surface bulge of disk body.Disk body 210 is provided with gas vent 213;Scroll wrap 211 forms swirler passages, uses
In placement wear plate 3.Correspondence gas vent one end of swirler passages is equipped with step 214, step 214 and the complementary docking of wear plate 3.Platform
The setting of rank 214 make 2 wear-resisting sheet head of scroll plate need not excessively extend and it is long and narrow, reduce wear plate fracture and deformation can
Can, the design freedom bigger of the size and location of gas vent;It can prevent high pressure chest working medium premature leakage, lower power consumption, energy
Effect is than improving.And another scroll plate can not be scratched in scroll plate 2 and another scroll plate engagement process.
In embodiments of the present invention, referring to Fig. 3, on the basis of 210 surface of disk body, 214 height of step is equal to or less than resistance to
The thickness of grinding 3.In design, step 214 can be integrally formed with disk body 210, can also be and 210 split settings of disk body
, as long as step 214 can be securely fixed in correspondence gas vent one end of swirler passages.During fabrication, step 214
It can be a part for the separation of wear plate 3.I.e. step 214 can be made together with resistance to numb piece 3 as the part of wear plate 3
Make, be separated into the step 4 and wear plate 3 of needs after finalization of the manufacture, can so ensure assembly when step 4 can with it is wear-resisting
Piece 3 carries out complementary docking well and thickness is almost the same.Certainly, in other embodiments of the invention, step 4 and wear-resisting
Piece 3 manufactures respectively, and step 4 can be ensured towards the end surface shape of wear plate 3 and the end surface shape towards step 4 of wear plate 3
It being capable of complementation.
In other embodiments, scroll wrap of the step 214 towards the end face of wear plate and step towards another scroll plate
It is rounding off between surface.It is another to prevent the scroll wrap of another scroll plate in the motion process coordinated with scroll wrap 211
The scroll wrap of scroll plate occurs friction with step 214 and the scroll wrap of another scroll plate and/or step 214 is caused to damage.
In embodiments of the present invention, step 214 at least extends to paving from close to 3 one end of wear plate towards close to gas vent direction
A part for the movement institute area coverage of the scroll wrap of full another scroll plate.Specifically, step 214 includes at least 214 institutes in Fig. 6
The part in the region of instruction.Certain step 214 can also be paved with the region in Fig. 6 indicated by 214.Aforementioned predetermined condition refers to
Two scroll wraps 411 are vented hole site in rotation to end of travel.In embodiments of the present invention, scroll plate 2 is fixed scroll.
In another application scenarios, step 214 covers the area that scroll wrap 211, wear plate 3 and gas vent 213 are surrounded
Domain.In this way, the clear area formed between 2 bottom surface of vortex crest top land and scroll plate of another scroll plate is filled, high pressure chest work
Matter will not premature leakage, lower power consumption, Energy Efficiency Ratio improve.
In conclusion the scroll plate of the screw compressor of the present invention includes:Disk body and vortex from one surface bulge of disk body
Tooth;Disk body is provided with gas vent;Scroll wrap forms swirler passages, for placing wear plate;The correspondence gas vent one of swirler passages
End is equipped with step, step and wear plate complementation docking, reduces the possibility of wear plate fracture and deformation, the size of gas vent and position
The design freedom bigger set prevents high pressure chest working medium premature leakage, lower power consumption, Energy Efficiency Ratio from improving.
Example the above is only the implementation of the present invention is not intended to limit the scope of the invention, every to utilize this hair
Equivalent structure or equivalent flow shift made by bright specification and accompanying drawing content is applied directly or indirectly in other relevant skills
Art field, is included within the scope of the present invention.
Claims (10)
1. a kind of scroll plate of screw compressor, which is characterized in that including:
Disk body and scroll wrap from one surface bulge of the disk body;
The disk body is provided with gas vent;
The scroll wrap forms swirler passages, for placing wear plate;
Described gas vent one end of correspondence of the swirler passages is equipped with step, the step and wear plate complementation docking.
2. scroll plate according to claim 1, which is characterized in that
The step at least extends to from close described wear plate one end towards the close gas vent direction and is paved with another scroll plate
Scroll wrap movement institute area coverage a part.
3. scroll plate according to claim 1, which is characterized in that
On the basis of the disc surfaces, the step height is equal to or less than the thickness of the wear plate.
4. scroll plate according to any one of claims 1 to 3, which is characterized in that
The step is integrally formed with the disk body.
5. scroll plate according to any one of claims 1 to 3, which is characterized in that
The step is a part for the separation of the wear plate.
6. scroll plate according to any one of claims 1 to 3, which is characterized in that the step is towards the wear plate
End face and the step are towards being rounding off between the surface of the scroll wrap of another scroll plate.
7. scroll plate according to any one of claims 1 to 3, which is characterized in that the scroll plate is fixed scroll.
8. a kind of screw compressor, which is characterized in that including scroll plate as described in any one of claim 1 to 7.
9. a kind of air-conditioning equipment, which is characterized in that including screw compressor as claimed in claim 8.
10. a kind of motor device, which is characterized in that including air-conditioning equipment as claimed in claim 9.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201610766942.XA CN106438353B (en) | 2016-08-30 | 2016-08-30 | Screw compressor and its scroll plate, air-conditioning equipment and motor device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201610766942.XA CN106438353B (en) | 2016-08-30 | 2016-08-30 | Screw compressor and its scroll plate, air-conditioning equipment and motor device |
Publications (2)
Publication Number | Publication Date |
---|---|
CN106438353A CN106438353A (en) | 2017-02-22 |
CN106438353B true CN106438353B (en) | 2018-10-09 |
Family
ID=58091417
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201610766942.XA Active CN106438353B (en) | 2016-08-30 | 2016-08-30 | Screw compressor and its scroll plate, air-conditioning equipment and motor device |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN106438353B (en) |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6041237B2 (en) * | 1981-03-09 | 1985-09-14 | サンデン株式会社 | Scroll type fluid device |
GB2167133B (en) * | 1984-11-19 | 1988-04-07 | Sanden Corp | Scroll-type rotary fluid-machine |
US5727934A (en) * | 1995-10-30 | 1998-03-17 | Mitsubishi Jukogyo Kabushiki Kaisha | Scroll type fluid machine having a thin plate for each scroll |
KR101491141B1 (en) * | 2008-06-13 | 2015-02-09 | 한라비스테온공조 주식회사 | Compressing mechanism for scroll compressor |
CN206329490U (en) * | 2016-08-30 | 2017-07-14 | 安徽大富重工机械有限公司 | Screw compressor and its scroll plate, air-conditioning equipment and motor device |
-
2016
- 2016-08-30 CN CN201610766942.XA patent/CN106438353B/en active Active
Also Published As
Publication number | Publication date |
---|---|
CN106438353A (en) | 2017-02-22 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN206329490U (en) | Screw compressor and its scroll plate, air-conditioning equipment and motor device | |
CN106438353B (en) | Screw compressor and its scroll plate, air-conditioning equipment and motor device | |
CN102966535B (en) | It is provided with the crescent gear pump of static pressure supporting device | |
CN201636194U (en) | Eccentric crankshaft and rotary compressor using same | |
CN205779712U (en) | The rolling rotor-type automobile air conditioner compressor that a kind of auto parts machinery is special | |
CN204729305U (en) | The piston of rotary compressor and there is its rotary compressor, multistage compressor | |
CN107829930B (en) | Automobile air conditioner compressor | |
WO2017002967A1 (en) | Scroll-type fluid machine | |
JP2009215894A (en) | Hermetic compressor | |
KR101587172B1 (en) | Scroll compressor | |
CN105003526A (en) | Rotary compressor and crankshaft thereof | |
CN102112747B (en) | Rotary compressor | |
CN207761943U (en) | Scroll compressor | |
CN105570278A (en) | Connecting rod and reciprocating compressor | |
CN205918588U (en) | Scroll compressor and vortex dish assembly thereof | |
CN202250877U (en) | Drain valve and scroll compressor comprising same | |
US20200370556A1 (en) | Scroll fluid machine | |
CN205315470U (en) | Connecting rod and reciprocating compressor | |
CN205089604U (en) | Scroll compressor having a plurality of scroll members | |
CN109441815A (en) | Transfiguration pump assembly, compressor, air conditioner | |
CN203500007U (en) | Rotary compressor and refrigerating cycle device | |
CN103089618B (en) | Scroll compressor | |
CN204900259U (en) | Rotary compressor and bent axle thereof | |
EP2626561B1 (en) | Scroll compressor and scroll processing method | |
JP5360264B2 (en) | Rotary compressor |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
C06 | Publication | ||
PB01 | Publication | ||
SE01 | Entry into force of request for substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
GR01 | Patent grant | ||
GR01 | Patent grant | ||
TR01 | Transfer of patent right | ||
TR01 | Transfer of patent right |
Effective date of registration: 20190926 Address after: 233090 No. 6525 Donghai Avenue, Bengbu City, Anhui Province (in Anhui Tianxin Heavy Industry Technology Co., Ltd.) Patentee after: Anhui Dafu Intelligent Air Conditioning Technology Co., Ltd. Address before: 233090 assembly workshop, car 6525, Donghai Avenue, Bengbu, Anhui Patentee before: Anhui Dafu Heavy Machinery Co. |