CN207368845U - Rotor and there is its motor, compressor and refrigeration plant - Google Patents
Rotor and there is its motor, compressor and refrigeration plant Download PDFInfo
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- CN207368845U CN207368845U CN201721510400.2U CN201721510400U CN207368845U CN 207368845 U CN207368845 U CN 207368845U CN 201721510400 U CN201721510400 U CN 201721510400U CN 207368845 U CN207368845 U CN 207368845U
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- rotor
- end ring
- rotor core
- sectional area
- utility
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Abstract
The utility model discloses a kind of rotor and there is its motor, compressor and refrigeration plant, the rotor includes：Rotor core, in the rotor core equipped with it is multiple circumferentially-spaced opening along its and along its axially through rotor slot；Multiple conductive bars, multiple conductive bars are plugged in multiple rotor slots correspondingly；Two end ring, two end ring are respectively arranged on the axial both ends of the rotor core, multiple conductive bars are connected by the end ring, wherein, at least described conductive bar is copper piece in the conductive bar and the end ring, and meets following relational expression between the sum of radial cross-sectional area of multiple conductive bars A and the radial cross-sectional area S of the rotor core：0.13≤A/S≤0.16.It is small, performance is good according to the rotor of the utility model embodiment, so that efficient, the small and cost of the motor equipped with the rotor is low.
Description
Technical field
Compressor apparatus field is the utility model is related to, more particularly, to a kind of rotor and there is its motor, compressor
And refrigeration plant.
Background technology
Cage rotor in correlation technique is mostly cast-aluminum rotor, but since the resistivity of aluminum is high, is thereby resulted in
The problems such as the power density of cast aluminium motor is low, volume is big, resistance is big, energy consumption of electrical machinery is high and electric efficiency is low.Due to copper product
The resistivity that resistivity compares aluminum is much lower, and the application of copper casting rotor is more and more at present, due to aluminum and copper material
The characteristic of material is different, the parameter of structure design of cast-aluminum rotor (such as the size of the number of conductive bar, size and rotor core
Deng) copper casting rotor is not particularly suited for, it is obtained if designing production copper casting rotor according to the parameter of structure design of cast-aluminum rotor
The performance of copper casting rotor is not optimal.
Utility model content
The utility model is intended to solve at least some of the technical problems in related technologies.For this reason, this reality
With a kind of rotor of new proposition, the small of the rotor, performance are good so that the motor equipped with the rotor it is efficient,
Small and cost is low.
The utility model also proposes a kind of motor with above-mentioned rotor.
The utility model also proposes a kind of compressor with above-mentioned motor.
The utility model also proposes a kind of refrigeration plant with above-mentioned compressor.
According to the rotor of the utility model first aspect embodiment, including：Rotor core, the rotor core are interior equipped with more
It is a circumferentially-spaced opening along its and along its axially through rotor slot；Multiple conductive bars, multiple conductive bars are correspondingly
It is plugged in multiple rotor slots；Two end ring, two end ring are respectively arranged on the axial both ends of the rotor core, more
A conductive bar is connected by the end ring, wherein, at least described conductive bar is copper piece in the conductive bar and the end ring,
And meet between the sum of radial cross-sectional area of multiple conductive bars A and the radial cross-sectional area S of the rotor core as follows
Relational expression：0.13≤A/S≤0.16.
It is small, performance is good according to the rotor of the utility model embodiment, so that the effect of the motor equipped with the rotor
Rate is high, small and cost is low.
In addition, according to the rotor of the utility model embodiment, there can also be following additional technical feature：
In certain embodiments, the radial cross-sectional area of multiple conductive bars is equal.
In certain embodiments, the end ring is copper piece.
Alternatively, the sum of axial cross section area of the radial cross-sectional area A1 of each conductive bar and two end ring
Meet following relational expression between B：0.03≤A1/B≤0.1.
In certain embodiments, the rotor slot is formed completely through the open slot of the rotor core outer circumferential surface.
In certain embodiments, the rotor slot shape becomes the closed slot being spaced apart with the rotor core outer circumferential surface.
In certain embodiments, the rotor core be equipped with it is at least one along its axially through and with the rotor slot
Venthole spaced apart.
Alternatively, between the sum of radial cross-sectional area of venthole C and the radial cross-sectional area S of the rotor core
Meet following relational expression：0 ＜ C/S≤0.03.
Alternatively, the venthole includes multiple, the multiple venthole being provided at circumferentially spaced along the rotor core.
According to the motor of the utility model second aspect, including the rotor according to the above-mentioned first aspect of the utility model.
Motor according to the present utility model, by setting the rotor of above-mentioned first aspect, so as to improve the entirety of motor
Performance, efficient, the small and cost of motor are low.
According to the compressor of the utility model third aspect, including the motor according to the above-mentioned second aspect of the utility model.
Compressor according to the present utility model, by setting the motor of above-mentioned second aspect, so as to improve compressor
Overall performance.
According to the refrigeration plant of the utility model fourth aspect, including the compressor according to the utility model third aspect.
Refrigeration plant according to the present utility model, by setting the compressor of the above-mentioned third aspect, so as to improve refrigeration
The overall performance of equipment.
The additional aspect and advantage of the utility model will be set forth in part in the description, partly by from following description
In become obvious, or recognized by the practice of the utility model.
Brief description of the drawings
The above-mentioned and/or additional aspect and advantage of the utility model will in the description from combination accompanying drawings below to embodiment
Become obvious and be readily appreciated that, wherein：
Fig. 1 is the longitudinal section view (view in transverse section) according to the rotor of the utility model embodiment；
Fig. 2 is the axial, cross-sectional view (longitdinal cross-section diagram) according to the rotor of the utility model embodiment；
Fig. 3 is the axial, cross-sectional view (longitdinal cross-section diagram) according to the compressor of the utility model embodiment.
Reference numeral：
Rotor 100；
Rotor core 1；Mounting hole 11；Rotor slot 12；Venthole 13；
Conductive bar 2；
End ring 3；
Motor 200；Stator 201；
Compression mechanism 300；
Compressor 400.
Embodiment
The embodiment of the utility model is described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning
Same or similar element is represented to same or similar label eventually or there is same or like element.Below by ginseng
The embodiment for examining attached drawing description is exemplary, it is intended to for explaining the utility model, and it is not intended that to the utility model
Limitation.
Following disclosure provides many different embodiments or example is used for realizing the different structure of the utility model.For
The disclosure of simplified the utility model, is hereinafter described the component and setting of specific examples.Certainly, they are only and show
Example, and purpose does not lie in limitation the utility model.In addition, the utility model can in different examples repeat reference numerals
And/or letter.This repetition is for purposes of simplicity and clarity, itself not indicate discussed various embodiments and/or set
Relation between putting.In addition, various specific techniques and the example of material that the utility model provides, but this area is common
Technical staff can be appreciated that the applicable property of other techniques and/or the use of other materials.
Rotor 100 below with reference to Fig. 1-Fig. 2 descriptions according to the utility model first aspect embodiment.
With reference to Fig. 1-Fig. 2, rotor 100 includes：1, two end ring 3 of rotor core and multiple conductive bars 2.
With reference to Fig. 1-Fig. 2, rotor core 1 be equipped with it is multiple circumferentially-spaced opening along its and along its axially through rotor slot
12.For example, rotor core 1 can be cylindrical and thereon formed with mounting hole 11 and multiple rotor slots 12, wherein, mounting hole 11
It is multiple for being connected with compression mechanism 300 (as described later) along the center axially through rotor core 1 of rotor core 1
Rotor slot 12 is along rotor core 1 circumferentially around mounting hole 11 and along rotor core 1 axially through multiple for assembling
Conductive bar 2, specifically, multiple conductive bars 2 are plugged in multiple rotor slots 12 correspondingly, that is to say, that each rotor slot
A conductive bar 2 is respectively fitted with 12.
Two end ring 3 are respectively arranged on the axial both ends of rotor core 1, such as in the example shown in Fig. 1-Fig. 2, rotor iron
The axial direction of core 1 vertically extends, and two end ring 3 are respectively provided at the upper and lower ends of rotor core 1.
Multiple conductive bars 2 are connected by end ring 3, specifically, the axial both ends of each conductive bar 2 respectively with two end ring 3
It is corresponding to be connected, such as in the example shown in Fig. 1-Fig. 2, the end ring 3 of the upper end of each conductive bar 2 with 1 upper end of rotor core
It is connected and is conducted with realizing, the lower end of each conductive bar 2 is connected with the end ring 3 of 1 lower end of rotor core is conducted with realizing.
Wherein, at least conductive bar 2 is copper piece in conductive bar 2 and end ring 3, you can with only multiple conductive bars 2 it is copper piece, end ring
3 be non-copper piece, or conductive bar 2 and end ring 3 are copper piece.
It should be noted that " copper piece " described here includes full copper material part and Copper alloy material part, i.e., conductive bar 2 can
Think full copper material part or Copper alloy material part, when conductive bar 2 is full copper material part, illustrate that conductive bar 2 is (purple by pure copper material
Copper product) it is made, when conductive bar 2 is Copper alloy material part, illustrate that conductive bar 2 is made of Cu alloy material, such as can be by
Brass, bronze or copper-nickel alloy material are made.In some instances, multiple conductive bars 2 are full copper material part；In some instances,
Multiple conductive bars 2 are Copper alloy material part；In some instances, the part in multiple conductive bars 2 is full copper material part, separately
A part is Copper alloy material part.
In addition, meet between the sum of radial cross-sectional area of multiple conductive bars 2 A and the radial cross-sectional area S of rotor core 1
Following relational expression：The radial direction of the sum of 0.13≤A/S≤0.16, i.e., the radial cross-sectional area of multiple conductive bars 2 A and rotor core 1
The ratio of area of section S is minimum to be not less than 0.13, and maximum no more than 0.16.
According to the rotor 100 of the utility model embodiment, the sum of the radial cross-sectional area by making multiple conductive bars 2 A with
Meet relational expression between the radial cross-sectional area S of rotor core 1：0.13≤A/S≤0.16 so that small, the property of rotor 100
Can be good, so that efficient, the small and cost of the motor 200 equipped with the rotor 100 is low.
In some embodiments of the utility model, the radial cross-sectional area of multiple conductive bars 2 is equal, so that turning
The processing of son 100 is more convenient.The sum of radial cross-sectional area of multiple conductive bars 2 A is the radial section of single conductive bar 2 at this time
The product of 2 number N of area A1 and conductive bar, i.e. A=A1*N.
In one embodiment of the utility model, end ring 3 is copper piece, i.e. conductive bar 2 and end ring 3 is copper piece, equally
Ground, end ring 3 can be full copper material part, or Copper alloy material part.In some instances, two end ring 3 are full copper
Material member；In some instances, two end ring 3 are Copper alloy material part；In some instances, an end ring 3 is full copper material
Matter part, another end ring 3 are Copper alloy material part.By making end ring 3 be again formed as copper piece, it can further reduce rotor 100
Volume, lifted rotor 100 performance.
Further, the sum of axial cross section area of the radial cross-sectional area A1 of each conductive bar 2 and two end ring 3 B it
Between meet following relational expression：0.03≤A1/B≤0.1, i.e., the radial cross-sectional area A1 of each conductive bar 2 and the axis of two end ring 3
It is minimum not less than 0.03 and maximum no more than 0.1 to the ratio of the sum of area of section B.Wherein as shown in Figure 2, positioned at rotor
The axial cross section area of the end ring 3 of 1 upper end of iron core is B1, and the axial cross section area positioned at the end ring 3 of 1 lower end of rotor core is
B2, B=B1+B2.By make the sum of the radial cross-sectional area A1 of each conductive bar 2 and the axial cross section area of two end ring 3 B it
Between meet relational expression：0.03≤A1/B≤0.1, can further lift the performance of rotor 100 and reduce the volume of rotor 100
And cost.
In some embodiments of the utility model, rotor slot 12 is formed completely through the open slot of 1 outer circumferential surface of rotor core,
100 performance of rotor can be so lifted, improves the efficiency of the motor 200 equipped with the rotor 100.
In one embodiment of the utility model, as Figure 1-Figure 2, rotor slot 12 be formed as with outside rotor core 1
The closed slot that side face is spaced apart, can so facilitate the manufacturing of rotor 100, when towards cast copper liquid in rotor slot 12,
Copper liquid will not overflow rotor slot 12, and production and processing is convenient.
In one embodiment of the utility model, rotor slot 12 is formed as circular trough, polygon groove (such as triangle
Groove, quadrangle groove or pentagon groove etc.), peariform slot or special-shaped slot.Wherein, the concept of " peariform slot " is those skilled in the art institute
Known, I will not elaborate.
In some embodiments of the utility model, rotor core 1 be equipped with it is at least one along its axially through and with
The venthole 13 spaced apart of rotor slot 12, so that the oil return effect of compressor 400 is good.
Preferably, meet between the sum of radial cross-sectional area of venthole 13 C and the radial cross-sectional area S of rotor core 1
Following relational expression：0 ＜ C/S≤0.03, i.e. the sum of radial cross-sectional area of venthole 13 C and the radial section face of rotor core 1
The ratio of product S is minimum to be not less than 0, and maximum no more than 0.03, the sum of radial cross-sectional area by making venthole 13 C and rotor
The ratio of the radial cross-sectional area S of iron core 1 within the above range, can lift the performance of rotor 100, and thus further lifting is electric
The efficiency of machine 200.
Venthole 13 includes multiple, multiple being provided at circumferentially spaced along rotor core 1 of venthole 13, it is preferable that Duo Getong
Stomata 13 is evenly spaced on along the circumferential direction of rotor core 1.As shown in fig. 1, multiple ventholes 13 can be fitted around hole 11
And along rotor core 1 axially through so that the oil return effect of compressor 400 is more preferable.The shape of venthole 13 can be with
It is arbitrarily selected according to the design needs, such as can be round hole, slotted eye, polygonal hole or irregularly-shaped hole.Preferably, such as Fig. 1
Shown in, the outer circumferential surface of 12 adjacent rotor iron core 1 of rotor slot is set, 13 adjacent rotor iron core 1 of venthole it is centrally disposed, thus
The performance of rotor 100 can further be lifted.
In one embodiment of the utility model, rotor core 1, conductive bar 2 and end ring 3 are integrally formed part, such as
Rotor core 1, conductive bar 2 and end ring 3 use the integrally manufactured shaping of die casting mode, thus, not only simplify production technology, are easy to
Automatic mass production, and the reliable high, good conductivity of connection of conductive bar 2 and end ring 3.
In one embodiment of the utility model, conductive bar 2 for solid bar and inserting in corresponding rotor slot 12 and with
Two end ring 3 are connected.Since the fusing point of copper is higher, by installation to rotor slot 12 after the single machine-shaping admittedly of conductive bar 2, can subtract
Few high temperature is good to loss, 100 overall performance of rotor caused by rotor core 1.Alternatively, end ring 3 separately formed can also be formed
It is connected after solid with conductive bar 2 by welding manner, connection reliability height and good conductivity.Preferably, end ring 3 can pass through pressure
Casting is formed on rotor core 1, it is possible thereby to the Joining Technology between end ring 3 and conductive bar 2 is saved, it is convenient to manufacture.
Here it is possible to understand, the processing method of " integrated die-casting shaping " and the processing method of " being weldingly connected " are
As it is known to those skilled in the art that I will not elaborate.
A specific example according to the present utility model is described referring to Fig. 1-Fig. 2, it is multiple as shown in Fig. 1-Fig. 2
Conductive bar 2 and two end ring 3 are copper piece, and rotor slot 12 and conductive bar 2 are 30, and venthole 13 is four, each rotor
The radial cross-sectional area of groove 12 is equal, and the radial cross-sectional area of each venthole 13 is equal, wherein, single conductive bar 2
Radial cross-sectional area is A1=12.5mm2, the sum of the radial cross-sectional area of multiple conductive bars 2 A=12.5*30=375mm2, rotor
The radial cross-sectional area of iron core 1 is S=2500mm2, the radial cross-sectional area C1=12.5mm of single venthole 132, venthole 13
The sum of radial cross-sectional area C=12.5mm2* 4=50mm2, positioned at the axial cross section area B 1 of the end ring 3 of 1 upper end of rotor core
=150mm2, positioned at the axial cross section area B 2=90mm of the end ring 3 of 1 lower end of rotor core2, the axial cross section face of two end ring 3
The sum of product B=B1+B2=240mm2。
Wherein, the ratio A/ of the sum of radial cross-sectional area of multiple conductive bars 2 A and the radial cross-sectional area S of rotor core 1
S=0.15；
The ratio A1/B=of the sum of the radial cross-sectional area A1 of each conductive bar 2 and the axial cross section area of two end ring 3 B
0.052；
Ratio C/S=0.02 of the sum of the radial cross-sectional area of venthole 13 C and the radial cross-sectional area S of rotor core 1.
The performance of the rotor 100 of the embodiment is good, small, so that the efficiency of the motor 200 equipped with the rotor 100
High, small and cost is low.
Motor 200 below with reference to Fig. 3 descriptions according to the utility model second aspect embodiment.
According to the motor 200 of the utility model embodiment, including：Stator 201 and rotor 100, wherein, rotor 100 is root
According to the rotor 100 of the above-mentioned first aspect embodiment of the utility model.
Specifically, stator 201 includes stator core and stator winding, and stator core is formed to define out central shaft hole
Ring-cylindrical, formed with opening the multiple of distribution axially through and along the circumferentially-spaced of stator core along stator core on stator core
Stator slot, stator winding are set around stator slot, and rotor 100 is rotatably arranged in central shaft hole.Thus, motor 200 turns to be interior
Minor motor.
According to the motor 200 of the utility model embodiment, since its setting is according to the rotor of the utility model first aspect
100, so as to improve the overall performance of motor 200, efficient, the small and cost of motor 200 is low.
Compressor 400 below with reference to Fig. 3 descriptions according to the utility model third aspect embodiment.
According to the compressor 400 of the utility model embodiment, including：Compression mechanism 300 and motor 200, wherein, motor
200 be the motor 200 according to the above-mentioned second aspect of the utility model.
Specifically, motor 200 is connected with compression mechanism 300 for driving 300 compression refrigerant of compression mechanism, so that real
Existing kind of refrigeration cycle.Such as in some embodiments of the utility model, compressor 400 can be rotary compressor, swinging
Compressor, reciprocating compressor etc., motor 200 are connected by its rotor 100 with the bent axle of compression mechanism 300, to drive pressure
Contracting mechanism 300 carries out refrigerant compression work.Here it is possible to understand, no matter compressor 400 why type, its compressor
Structure 300 is specifically configured to as it is known to those skilled in the art that being therefore no longer described in detail.In addition, according to the utility model embodiment
Compressor 400 other compositions such as housing and operation be all for those of ordinary skills it is known,
It is not detailed herein.
According to the compressor 400 of the utility model embodiment, by setting the motor 200 of above-mentioned second aspect, so as to carry
The high overall performance of compressor 400.
Refrigeration plant according to the utility model fourth aspect embodiment is described below.
According to the refrigeration plant (not shown) of the utility model embodiment, include the compressor 400 of above-described embodiment.Its
In, refrigeration plant can be the equipment that air-conditioning, refrigerator etc. have refrigerating function.
According to the refrigeration plant of the utility model embodiment, by setting the compressor 400 of the above-mentioned third aspect, so as to carry
The high overall performance of refrigeration plant.
In the description of the utility model, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", " axial direction ", " footpath
To ", the orientation of the instruction such as " circumferential direction " or position relationship be based on orientation shown in the drawings or position relationship, be for only for ease of and retouch
State the utility model and simplify and describe, rather than instruction or imply signified device or element must have specific orientation, with
Specific azimuth configuration and operation, therefore it is not intended that limitation to the utility model.
In addition, term " first ", " second " are only used for description purpose, and it is not intended that instruction or hint relative importance
Or the implicit quantity for indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can be expressed or
Implicitly include one or more this feature.In the description of the utility model, " multiple " are meant that two or two
More than, unless otherwise specifically defined.
In the utility model, unless otherwise clearly defined and limited, term " installation ", " connected ", " connection ", " Gu
It is fixed " etc. term should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or integrally；Can be
Mechanically connect or be electrically connected；It can be directly connected, can also be indirectly connected by intermediary, can be two
The interaction relationship of connection or two elements inside element.For the ordinary skill in the art, can basis
Concrete condition understands concrete meaning of the above-mentioned term in the utility model.In addition, in the utility model, unless otherwise clear and definite
Regulation and restriction, fisrt feature can be that the first and second features directly contact "above" or "below" second feature, or first
Pass through intermediary mediate contact with second feature.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or the spy for combining the embodiment or example description
Point is contained at least one embodiment or example of the utility model.In the present specification, to the schematic table of above-mentioned term
State and be necessarily directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be with
Combine in an appropriate manner in any one or more of the embodiments or examples.In addition, without conflicting with each other, this area
Technical staff can by the different embodiments or example described in this specification and different embodiments or exemplary feature into
Row combines and combination.
While there has been shown and described that the embodiment of the utility model, it will be understood by those skilled in the art that：
These embodiments can be carried out with a variety of changes, modification in the case where not departing from the principle and objective of the utility model, replaced
And modification, the scope of the utility model are limited by claim and its equivalent.
Claims (12)
- A kind of 1. rotor, it is characterised in that including：Rotor core, in the rotor core equipped with it is multiple circumferentially-spaced opening along its and along its axially through rotor slot；Multiple conductive bars, multiple conductive bars are plugged in multiple rotor slots correspondingly；Two end ring, two end ring are respectively arranged on the axial both ends of the rotor core, and multiple conductive bars pass through institute End ring is stated to be connected, wherein, at least described conductive bar is copper piece in the conductive bar and the end ring, and multiple conductive bars Meet following relational expression between the sum of radial cross-sectional area A and the radial cross-sectional area S of the rotor core：0.13≤A/S≤ 0.16。
- 2. rotor according to claim 1, it is characterised in that the radial cross-sectional area of multiple conductive bars is equal.
- 3. rotor according to claim 1, it is characterised in that the end ring is copper piece.
- 4. rotor according to claim 3, it is characterised in that the radial cross-sectional area A1 of each conductive bar and two Meet following relational expression between the sum of the axial cross section area of end ring B：0.03≤A1/B≤0.1.
- 5. rotor according to claim 1, it is characterised in that the rotor slot is formed completely through the rotor core periphery The open slot in face.
- 6. rotor according to claim 1, it is characterised in that the rotor slot shape becomes and the rotor core outer circumferential surface Closed slot spaced apart.
- 7. rotor according to claim 1, it is characterised in that the rotor core is passed through equipped with least one along its axial direction Venthole that is logical and being spaced apart with the rotor slot.
- 8. rotor according to claim 7, it is characterised in that the sum of radial cross-sectional area of venthole C with it is described Meet following relational expression between the radial cross-sectional area S of rotor core：0 ＜ C/S≤0.03.
- 9. the rotor according to claim 7 or 8, it is characterised in that the venthole includes multiple, multiple ventholes Along being provided at circumferentially spaced for the rotor core.
- 10. a kind of motor, it is characterised in that including the rotor according to any one of claim 1-9.
- 11. a kind of compressor, it is characterised in that including motor according to claim 10.
- 12. a kind of refrigeration plant, it is characterised in that including compressor according to claim 11.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721510400.2U CN207368845U (en) | 2017-11-13 | 2017-11-13 | Rotor and there is its motor, compressor and refrigeration plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721510400.2U CN207368845U (en) | 2017-11-13 | 2017-11-13 | Rotor and there is its motor, compressor and refrigeration plant |
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| Publication Number | Publication Date |
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| CN207368845U true CN207368845U (en) | 2018-05-15 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107666226A (en) * | 2017-11-13 | 2018-02-06 | 安徽美芝精密制造有限公司 | Rotor and there is its motor, compressor and refrigeration plant |
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2017
- 2017-11-13 CN CN201721510400.2U patent/CN207368845U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107666226A (en) * | 2017-11-13 | 2018-02-06 | 安徽美芝精密制造有限公司 | Rotor and there is its motor, compressor and refrigeration plant |
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