CN102022333B - Autorotation preventing mechanism as well as compressor and automobile using same - Google Patents
Autorotation preventing mechanism as well as compressor and automobile using same Download PDFInfo
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- CN102022333B CN102022333B CN201010518206A CN201010518206A CN102022333B CN 102022333 B CN102022333 B CN 102022333B CN 201010518206 A CN201010518206 A CN 201010518206A CN 201010518206 A CN201010518206 A CN 201010518206A CN 102022333 B CN102022333 B CN 102022333B
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- retainer
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- 229910000831 Steel Inorganic materials 0.000 claims abstract description 45
- 239000010959 steel Substances 0.000 claims abstract description 45
- 230000033001 locomotion Effects 0.000 claims abstract description 8
- 238000009987 spinning Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 abstract description 5
- 238000005096 rolling process Methods 0.000 abstract 3
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 9
- 238000012856 packing Methods 0.000 description 6
- 230000003068 static effect Effects 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
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Abstract
The embodiment of the invention discloses an autorotation preventing mechanism as well as a compressor and an automobile using the mechanism. The autorotation preventing mechanism is used for preventing the autorotation of a moving vortex disk in the working process in a scroll compressor and comprises a moving vortex disk retaining frame, a bearing seat retaining frame and a plurality of steel balls, wherein the moving vortex disk retaining frame is connected with the moving vortex disk; the bearing seat retaining frame is opposite to the moving vortex disk retaining frame; the steel balls are arranged between the moving vortex disk retaining frame and the bearing seat retaining frame; at least three concave annular rolling paths are correspondingly arranged on the moving vortex disk retaining frame and the bearing seat retaining frame; the steel balls are respectively arranged in each pair of corresponding annular rolling paths for preventing the autorotation motion of the moving vortex disk retaining frame together with the moving vortex disk relative to the bearing seat retaining frame; and the section contour line of each annular rolling path comprises at least two sections of circular involute segments. According to the autorotation preventing mechanism disclosed by the embodiment of the invention, the service life can be prolonged and the working performances under the conditions of low rotating speed, normal rotating speed or high rotating speed are ensured.
Description
[technical field]
The embodiment of the invention relates to the anti-rotation mechanism field, particularly a kind of thrust ball bearing anti-rotation mechanism, and the embodiment of the invention also relates to a kind of compressor and automobile that uses this mechanism simultaneously.
[background technique]
In compressor; Because rotating speed of automobile engine constantly changes; The most frequently used scroll compressor cross slip ring anti-rotation mechanism is difficult to adapt to operating mode and the rotating speed that automobile air conditioner compressor constantly changes under fixing operating mode, so anti-rotation mechanism is mostly used the thrust ball bearing anti-rotation mechanism in the vortex automobile air conditioner compressor.General thrust ball bearing anti-rotation mechanism is formed movable member by the Moving plate retainer and the Moving plate steel ball packing ring that are connected on the movable orbiting scroll, forms static part by the bearing support retainer and the bearing support steel ball packing ring that are connected on the bearing support.Movable member, static part and the steel ball that is installed between two parts are formed existing general split type thrust ball bearing anti-rotation mechanism.
Steel ball is a contact with contacting of retainer, steel ball packing ring in existing general split type thrust ball bearing anti-rotation mechanism, shown in the seeing figures.1.and.2 for example of concrete structure.
Wherein: Fig. 1 is the retainer general structure schematic representation of the split type thrust ball bearing anti-rotation mechanism of existing technology.As shown in Figure 1, in a plurality of steel balls 12 difference receiving holes 13, when split type thrust ball bearing anti-rotation mechanism of the prior art was worked, the chamfering in hole 13 contacted with steel ball 12 formation points on the retainer 11.
Fig. 2 is the part sectioned view of the split type thrust ball bearing anti-rotation mechanism of existing technology.As shown in Figure 2; The split type thrust ball bearing anti-rotation mechanism of existing technology comprises movable orbiting scroll steel ball packing ring 14, movable orbiting scroll retainer 15, steel ball 12, bearing support retainer 16 and bearing support steel ball packing ring 17, and wherein steel ball 12 is that point contacts with the contact position of other 4 parts.
Therefore the radial error that forms is processed or assembled to split type thrust ball bearing anti-rotation mechanism of the prior art with the form compensation of resiliently deformable easily.In the working procedure, the point of contact local deformation of steel ball and above-mentioned parts is a bit of circular arc under the effect of load, and the pressure that bears is very big, and corresponding part life is shorter.This characteristic makes this anti-rotation structure applications when compressor, the poor reliability of compressor.
[summary of the invention]
The technical problem that the present invention solves provides a kind of anti-rotation mechanism and uses the compressor and the automobile of this mechanism.
The embodiment of the invention is that the technological scheme that the technical solution problem is taked is: a kind of anti-rotation mechanism is provided; Be used for preventing movable orbiting scroll rotation in the course of the work at scroll compressor; Comprise the movable orbiting scroll retainer that is connected with movable orbiting scroll, with respect to the bearing support retainer of movable orbiting scroll retainer setting and be located at the movable orbiting scroll retainer and the bearing support retainer between a plurality of steel balls; Wherein, All correspondence is provided with at least three recessed ring-type raceways on movable orbiting scroll retainer and bearing support retainer; In each ring-type raceway that correspondence is provided with, place a steel ball respectively, in case stop whirlpool disk holder is made spinning motion together with movable orbiting scroll with respect to the bearing support retainer, the cross section contour of each ring-type raceway comprises the involute line segment of at least two sections circles.
The embodiment of the invention is that the technological scheme that the technical solution problem is taked is: a kind of anti-rotation mechanism is provided; Comprise first retainer, with respect to second retainer of the first retainer setting and be located at first retainer and second retainer between a plurality of steel balls; Wherein, All correspondence is provided with a plurality of ring-type raceways on first retainer and second retainer; In each ring-type raceway that correspondence is provided with, place a steel ball respectively, be used to prevent the spinning motion of first retainer with respect to second retainer, the cross section contour of ring-type raceway comprises the involute line segment of at least two sections circles.
Compared with prior art; The anti-rotation mechanism that the embodiment of the invention provides has a plurality of recessed ring-type raceways on each sheet retainer; The cross section contour of raceway is made up of at least two sections involute line segment; This structure makes and has adopted this kind to prevent obtaining lifting by a relatively large margin from the compressor operating life-span of rotation structure, makes the service behaviour of compressor under the slow-speed of revolution, rated speed or high speed conditions all be guaranteed simultaneously.
[description of drawings]
In order to be illustrated more clearly in the technological scheme in the embodiment of the invention, the accompanying drawing of required use is done to introduce simply in will describing embodiment below, and Fig. 1 is the retainer general structure schematic representation of the split type anti-rotation mechanism of existing technology;
Fig. 2 is the part sectioned view of the split type thrust ball bearing anti-rotation mechanism of existing technology;
Fig. 3 is the structural drawing of the compressor of the anti-rotation mechanism of the employing embodiment of the invention;
Fig. 4 is the general structure schematic representation according to the anti-rotation mechanism of first embodiment of the invention;
Fig. 5 a is the section part schematic representation of the ring-type raceway of AA institute along the line intercepting among Fig. 4;
Fig. 5 b is by the structural drawing that identifies the ring-type raceway that I drew a circle to approve among Fig. 5 a;
Fig. 6 is the part sectioned view according to the anti-rotation mechanism of first embodiment of the invention;
Fig. 7 is the general structure schematic representation according to the anti-rotation mechanism of second embodiment of the invention;
Fig. 8 a is the section part schematic representation of the ring-type raceway of BB institute along the line intercepting among Fig. 7;
Fig. 8 b is by the structural drawing that identifies the ring-type raceway that E drew a circle to approve among Fig. 8 a; And
Fig. 9 is the part sectioned view according to the anti-rotation mechanism of second embodiment of the invention.
[specific embodiment]
To combine the accompanying drawing in the embodiment of the invention below, the technological scheme in the embodiment of the invention will be carried out clear, intactly description.At first with reference to Fig. 3, Fig. 3 has introduced the structure of the compressor of the anti-rotation mechanism that adopts the embodiment of the invention.As shown in Figure 3, adopt the compressor of the anti-rotation mechanism of the embodiment of the invention mainly to comprise housing 21, quiet whirlpool dish 22, movable orbiting scroll 23, movable orbiting scroll retainer 24, steel ball 25, bearing support retainer 26, balancing weight 27, bearing support 28, axle 29, magnetic clutch 20.During compressor operating; Power source (not illustrating) is through magnetic clutch 20 input power; Movable orbiting scroll 23 at axle 29 and anti-rotation mechanism of the present invention (as shown in Figure 3, it is made up of movable orbiting scroll retainer 24, steel ball 25, bearing support retainer 26 etc.) thus acting in conjunction under coil 22 plane motions around quiet whirlpool and form the cavity that diminishes continuously with it, play the effect of compressed fluid; Wherein, will be in hereinafter specifically introducing this anti-rotation mechanism according to the embodiment of the invention.
Fig. 4, Fig. 5 a, Fig. 5 b and Fig. 6 have introduced the structural drawing according to the anti-rotation mechanism of first embodiment of the invention, and wherein, Fig. 4 is the general structure schematic representation according to the anti-rotation mechanism of first embodiment of the invention.Can know by Fig. 4; According to corresponding at least three the recessed ring-type raceways (Fig. 4 illustrates 18) that are provided with on the retainer surface of the anti-rotation mechanism of first embodiment of the invention;, particularly, at least three recessed ring-type raceways of corresponding setting on movable orbiting scroll retainer 45 and bearing support retainer 43; And in each ring-type raceway that correspondence is provided with, place a steel ball respectively; Specifically as shown in Figure 4, ring-type raceway 42 is set on movable orbiting scroll retainer 45, and on bearing support retainer 43, ring-type raceway 41 is set.
Please further referring to Fig. 5 a, wherein, Fig. 5 a is the section part schematic representation of the ring-type raceway of AA institute along the line intercepting among Fig. 4, and shown in Fig. 5 a, the profile line in the cross section of ring-type raceway is made up of two sections line segment X1 and X2, and X1 and X2 are round involute.
Please further referring to Fig. 5 b, it further clearly shows among Fig. 5 a the structure by the profile line of the sign ring-type raceway that I drew a circle to approve.Shown in Fig. 5 b, two sections line segment X1 and X2 are round involute, the two smooth connection.
Clearly demonstrate for first embodiment of the invention is made more, will do further to introduce to first embodiment of the invention with reference to Fig. 6 at present, wherein, Fig. 6 be the part sectioned view according to the anti-rotation mechanism of first embodiment of the invention.As shown in Figure 6; The thrust ball bearing anti-rotation mechanism comprises movable orbiting scroll retainer 43, steel ball 44; Bearing support retainer 45, wherein movable orbiting scroll retainer 43 and bearing support retainer 45 are installed relatively, and correspondence is provided with at least three recessed ring-type raceways; Steel ball ball 44 relative set are in the ring-type raceway, in case stop whirlpool disk holder 43 is made spinning motion together with movable orbiting scroll 23 (as shown in Figure 3) with respect to bearing support retainer 45.Wherein, two line X1, X2 forming the profile line of ring-type raceway are round involute, and steel ball 44 is two segment circular arcs with contact position A1, the B1 of the ring-type raceway of whirlpool disk holder 43 and bearing support retainer 45.
It should be noted that in the first embodiment of the present invention when involute line segment minimum profile curvature radius is Rm, the steel ball radius that assembles on the raceway is Rb, and the span of Rm is when being 0.9Rb≤Rm＜Rb, the effect that can obtain is preferable.In addition; The difference at the exhibition angle at the involute line segment two ends of circle can be set to be less than or equal to π/3; The minimum profile curvature radius end of the involute line segment of circle is positioned at the avris of ring-type raceway, and the maximum curvature radius end is positioned at the middle part of ring-type raceway, and; The Base radius of involute can change, and also can be constant.
In the first embodiment of the present invention; Because it is 2 points that the involute of circle can make steel ball 44 begin with the contact position of whirlpool disk holder of relative installation 43 and bearing support retainer 45 respectively; Therefore when compressor operating; Under the effect of load, steel ball 44 becomes two segment circular arcs with two point of contact generation resiliently deformables of retainer (being movable orbiting scroll retainer 43 or bearing support retainer 45) and contacts, after running a period of time; The resiliently deformable of whirlpool disk holder 43 and bearing support retainer 45 has part becomes permanent deformation; The movable orbiting scroll 23 that makes compressor is compensated with the error that 22 radial fit are coiled in quiet whirlpool significantly, and radial leakage drops to very low level, thereby has good performance when having guaranteed compressor operating.
Fig. 7, Fig. 8 a, Fig. 8 b and Fig. 9 have introduced the structural drawing according to the anti-rotation mechanism of second embodiment of the invention, and wherein, Fig. 7 is the general structure schematic representation according to the anti-rotation mechanism of second embodiment of the invention.Can know by Fig. 7; Be provided with at least three recessed ring-type raceways (shown in Fig. 7 18) according to correspondence on the retainer surface of the anti-rotation mechanism of second embodiment of the invention; Particularly; At least three recessed ring-type raceways of corresponding setting on movable orbiting scroll retainer 55 and bearing support retainer 53, and in each ring-type raceway that correspondence is provided with, place a steel ball respectively, specifically as shown in Figure 7; Ring-type raceway 52 is set on movable orbiting scroll retainer 55, and on bearing support retainer 53, ring-type raceway 51 is set.
Please further referring to Fig. 8 a; Wherein, Fig. 8 a is the section part schematic representation of the ring-type raceway of BB institute along the line intercepting among Fig. 7, shown in Fig. 8 a; The profile line in the cross section of ring-type raceway is made up of three sections line segment S1, S2 and S3; S1 and S2 as the side of ring-type raceway are round involute, and S3 is a straight line, and S3 and S1 and S2 couple together glossily.
Please further referring to Fig. 8 b, it further clearly shows among Fig. 8 a the structure by the profile line of the sign ring-type raceway that E drew a circle to approve.Shown in Fig. 8 b, the S1 and the S2 that form the profile line in cross section are round involute, and S3 is a straight line, and S3 is connected with S1 and S2 are smooth respectively.
Clearly demonstrate for second embodiment of the invention is made more, will do further to introduce to second embodiment of the invention with reference to Fig. 9 at present.Wherein, Fig. 9 is the part sectioned view according to the anti-rotation mechanism of second embodiment of the invention.As shown in Figure 9; The thrust ball bearing anti-rotation mechanism comprises movable orbiting scroll retainer 53, steel ball 54 and bearing support retainer 55; Wherein movable orbiting scroll retainer 53 and bearing support retainer 55 are installed relatively; And be correspondingly provided with a plurality of recessed ring-type raceways, steel ball 54 relative set are in ring-type raceway at least, in case stop whirlpool disk holder 53 is made spinning motion together with movable orbiting scroll 23 (as shown in Figure 3) with respect to bearing support retainer 55.Wherein, two line S1, S2 forming the raceway profile line are round involute, and wherein S3 is a bit of straight line, and contact position A2, the B2 of the ring-type raceway in steel ball 54 and whirlpool disk holder 53 and the bearing support retainer 55 are two segment circular arcs.
It should be noted that in the second embodiment of the present invention when involute line segment minimum profile curvature radius is Rm, the steel ball radius that assembles on the raceway is Rb, when the span of Rm was 0.9Rb≤Rm＜Rb, its effect that obtains was best.In addition; The difference at the exhibition angle at the involute line segment two ends of circle is preferably and is less than or equal to π/3; The minimum profile curvature radius end of the involute line segment of circle is positioned at the avris of ring-type raceway, and the maximum curvature radius end is positioned at the middle part of ring-type raceway, and; The Base radius of involute can change, and also can be constant.
Because steel ball 54 contacts with 2 of retainers (movable orbiting scroll retainer 53 or bearing support retainer 55); When making compressor operating; Steel ball 54 becomes two segment circular arcs with two point of contact generation resiliently deformable under the effect of load of retainer and contacts; After running a period of time; The resiliently deformable of retainer has part becomes permanent deformation, and the dynamic and static whirlpool of compressor dish is compensated by the radial fit error that processing or assembling cause significantly, and the radial leakage of compressor drops to very low level; The work of having guaranteed the time can have good performance, and ring-type raceway structure makes it that performance adopts the scroll compressor of the split type thrust ball bearing anti-rotation mechanism of current programme good relatively when the slow-speed of revolution simultaneously.
It should be noted that in other embodiments of the invention S3 also can be a bit of circular arc, when S3 is a bit of circular arc, can reach above-mentioned identical technique effect equally.
In addition, in other embodiments of the invention,, utilize the different line segments of involute line segment to be combined to form the cross section profile of ring-type raceway, also can reach identical technique effect with other as long as the cross section profile of ring-type raceway comprises the involute line segment of at least two sections circles.
In above embodiment; Because it is 2 points that the involute of circle can make the contact position of steel ball and retainer begin, when compressor operating, under the effect of load; Steel ball becomes two segment circular arcs with two point of contact generation resiliently deformables of retainer and contacts; After running a period of time, the resiliently deformable of retainer has part becomes permanent deformation, and the error that the dynamic and static whirlpool of compressor disc radial is cooperated is compensated significantly; Make radial leakage drop to very low level, thereby have good performance when having guaranteed compressor operating.And; Because the line length that contacts of steel ball and retainer, steel ball packing ring in the more existing general split type thrust ball bearing anti-rotation mechanism of the circular arc of two segments of steel ball contact position, thus the scroll compressor life-span of employing anti-rotation mechanism of the present invention can be increased dramatically relatively.
Therefore, the anti-rotation mechanism of the embodiment of the invention can make and adopt this kind to prevent obtaining lifting by a relatively large margin from the compressor operating life-span of rotation structure, make the service behaviour of compressor under the slow-speed of revolution, rated speed or high speed conditions all be guaranteed simultaneously.
It is to be noted; Terms such as " first " mentioned in an embodiment of the present invention, " second " only are the letter symbols that adopts as required; In practice, be not limited to this; And this Chinese character number can be exchanged use, and for example, movable orbiting scroll retainer and bearing support retainer can be called first, second retainer etc. as required respectively.In addition,, this paper introduces although being embodiment with the automobile air conditioner compressor,, need to understand, can be applied to other suitable occasions according to the anti-rotation mechanism of the embodiment of the invention, such as freezer compressor etc.
Claims (9)
1. anti-rotation mechanism; Be used for preventing movable orbiting scroll rotation in the course of the work at scroll compressor; It is characterized in that; Comprise the movable orbiting scroll retainer that is connected with said movable orbiting scroll, with respect to the bearing support retainer of said movable orbiting scroll retainer setting and be located at said movable orbiting scroll retainer and said bearing support retainer between a plurality of steel balls; Wherein, all correspondence is provided with at least three recessed ring-type raceways on said movable orbiting scroll retainer and said bearing support retainer, in each said ring-type raceway that correspondence is provided with, places a said steel ball respectively; Make spinning motion together with said movable orbiting scroll with respect to said bearing support retainer to prevent said movable orbiting scroll retainer; The cross section contour of said ring-type raceway comprises the involute line segment of at least two sections circles, and the minimum profile curvature radius end of the involute line segment of said circle is positioned at the avris of said ring-type raceway, and the maximum curvature radius end of the involute line segment of said circle is positioned at the middle part of said ring-type raceway.
2. anti-rotation mechanism according to claim 1 is characterized in that, the involute line segment of said two sections circles interconnects.
3. anti-rotation mechanism according to claim 1; It is characterized in that; The cross section contour of said ring-type raceway comprises involute line segment and the one section straight lines or the circular arc line segment of two sections circles, said straight lines or circular arc line segment respectively with smooth connection of involute line segment of said two sections circles.
4. according to each described anti-rotation mechanism of claim 1 to 3, it is characterized in that the involute line segment minimum profile curvature radius of said circle is Rm, the steel ball radius that assembles on the said ring-type raceway is Rb, wherein 0.9Rb≤Rm＜Rb.
5. according to each described anti-rotation mechanism of claim 1 to 3, it is characterized in that the Base radius size of the involute line segment of said circle is constant or changes.
6. according to each described anti-rotation mechanism of claim 1 to 3, it is characterized in that the difference at the involute line segment two-end-point exhibition angle of said circle is less than or equal to π/3.
7. anti-rotation mechanism; Comprise first retainer, with respect to second retainer of the said first retainer setting and be located at said first retainer and said second retainer between a plurality of steel balls; Wherein, All correspondence is provided with a plurality of ring-type raceways on said first retainer and said second retainer, in each said ring-type raceway that correspondence is provided with, places a said steel ball respectively, is used to prevent the spinning motion of said first retainer with respect to said second retainer; It is characterized in that; The cross section contour of said ring-type raceway comprises the involute line segment of at least two sections circles, and the minimum profile curvature radius end of the involute line segment of said circle is positioned at the avris of said ring-type raceway, and the maximum curvature radius end of the involute line segment of said circle is positioned at the middle part of said ring-type raceway.
8. a scroll compressor is characterized in that, said scroll compressor comprises each described anti-rotation mechanism of claim 1 to 7.
9. an automobile is characterized in that, the air condition compressor of said automobile comprises each described anti-rotation mechanism of claim 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010518206A CN102022333B (en) | 2010-10-25 | 2010-10-25 | Autorotation preventing mechanism as well as compressor and automobile using same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010518206A CN102022333B (en) | 2010-10-25 | 2010-10-25 | Autorotation preventing mechanism as well as compressor and automobile using same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102022333A CN102022333A (en) | 2011-04-20 |
| CN102022333B true CN102022333B (en) | 2012-10-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010518206A Active CN102022333B (en) | 2010-10-25 | 2010-10-25 | Autorotation preventing mechanism as well as compressor and automobile using same |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2046161U (en) * | 1988-11-24 | 1989-10-18 | 赵硕颀 | Dual point contact between ball and rolling track type rolling bearing |
| US4934909A (en) * | 1987-12-21 | 1990-06-19 | Kabushiki Kaisha Toyoda Jidoshokki Seisakusho | Scroll compressor with rotation preventing apparatus |
| EP0757178A1 (en) * | 1995-08-03 | 1997-02-05 | Sanden Corporation | Rotation preventing device for orbiting member of fluid displacement apparatus |
| US6149412A (en) * | 1998-08-05 | 2000-11-21 | Sanden Corporation | Rotation preventing mechanism using thrust ball bearing and scroll type compressor using the same |
| CN101737423A (en) * | 2008-11-17 | 2010-06-16 | 陈政 | Four-point contact ball bearing |
| CN201934312U (en) * | 2010-10-25 | 2011-08-17 | 配天(安徽)电子技术有限公司 | Anti-rotation mechanism and compressor and vehicle using same |
-
2010
- 2010-10-25 CN CN201010518206A patent/CN102022333B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4934909A (en) * | 1987-12-21 | 1990-06-19 | Kabushiki Kaisha Toyoda Jidoshokki Seisakusho | Scroll compressor with rotation preventing apparatus |
| CN2046161U (en) * | 1988-11-24 | 1989-10-18 | 赵硕颀 | Dual point contact between ball and rolling track type rolling bearing |
| EP0757178A1 (en) * | 1995-08-03 | 1997-02-05 | Sanden Corporation | Rotation preventing device for orbiting member of fluid displacement apparatus |
| US6149412A (en) * | 1998-08-05 | 2000-11-21 | Sanden Corporation | Rotation preventing mechanism using thrust ball bearing and scroll type compressor using the same |
| CN101737423A (en) * | 2008-11-17 | 2010-06-16 | 陈政 | Four-point contact ball bearing |
| CN201934312U (en) * | 2010-10-25 | 2011-08-17 | 配天(安徽)电子技术有限公司 | Anti-rotation mechanism and compressor and vehicle using same |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102022333A (en) | 2011-04-20 |
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Effective date of registration: 20190916 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: 233000 assembly shop, No. 6525, Donghai Road, Anhui, Bengbu (No. 7 workshop) Patentee before: Anhui Dafu Heavy Machinery Co. |