CN203962398U - Rotary compressor and the refrigeration system with it - Google Patents
Rotary compressor and the refrigeration system with it Download PDFInfo
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- CN203962398U CN203962398U CN201420324403.7U CN201420324403U CN203962398U CN 203962398 U CN203962398 U CN 203962398U CN 201420324403 U CN201420324403 U CN 201420324403U CN 203962398 U CN203962398 U CN 203962398U
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Abstract
The utility model discloses a kind of rotary compressor and there is its refrigeration system.Described rotary compressor comprises: housing, is limited with airtight installation cavity in described housing; Cylinder, described cylinder is located in described installation cavity, and described cylinder has cylinder chamber, and the internal diameter that defines described cylinder chamber is Dcy; Upper bearing (metal), described upper bearing (metal) is located at described cylinder upper end; And external rotor electric machine, described external rotor electric machine is located in described installation cavity and is positioned at the top of described upper bearing (metal), described external rotor electric machine comprises stator and is rotatably located at the rotor of described stator outside, the external diameter that defines described rotor is Dr, and the inner diameter D cy of described cylinder chamber and the outer diameter D r of described rotor meet: Dr/Dcy >=1.5.Good according to the utility model embodiment's rotary compressor performance.
Description
Technical field
The utility model relates to refrigeration technology field, especially relates to a kind of rotary compressor and has its refrigeration system.
Background technique
There is the rotary compressor of external rotor electric machine, because its driving part structure is different from the existing rotary compressor structure with inner rotor type motor completely, so have brand-new Definition of design in the inner each component structural of compressor, characteristic size.
Model utility content
The utility model is intended at least solve one of technical problem existing in prior art.For this reason, the utility model need to provide a kind of rotary compressor, and this rotary compressor performance is good.
The utility model also needs to provide a kind of refrigeration system with this rotary compressor.
According to the rotary compressor of the utility model first aspect, comprising: housing, is limited with airtight installation cavity in described housing; Cylinder, described cylinder is located in described installation cavity, and described cylinder has cylinder chamber, and the internal diameter that defines described cylinder chamber is Dcy; Upper bearing (metal), described upper bearing (metal) is located at described cylinder upper end; And external rotor electric machine, described external rotor electric machine is located in described installation cavity and is positioned at the top of described upper bearing (metal), described external rotor electric machine comprises stator and is rotatably located at the rotor of described stator outside, the external diameter that defines described rotor is Dr, and the inner diameter D cy of described cylinder chamber and the outer diameter D r of described rotor meet: Dr/Dcy >=1.5.
According to rotary compressor of the present utility model, by the ratio control that is Dcy by the internal diameter of the outer diameter D r of the rotor of external rotor electric machine and cylinder chamber for being more than or equal at 1.5 o'clock, can make the COP value of compressor improve, can make thus the performance of compressor be improved widely, in the time being applied in refrigeration system according to this rotary compressor, can improve refrigeration or the heating efficiency of whole refrigeration system.
In addition, also can there is following additional technical feature according to rotary compressor of the present utility model:
According to an embodiment of the present utility model, the inner diameter D cy of described cylinder chamber and the outer diameter D r of described rotor further meet: 1.75≤Dr/Dcy≤2.
According to an embodiment of the present utility model, the inner diameter D cy of described cylinder chamber and the outer diameter D r of described rotor further meet: 1.8≤Dr/Dcy≤1.85.
According to an embodiment of the present utility model, the height that defines described stator is Hm, and the height that defines described upper bearing (metal) is Hb, and the height H m of described stator and the height H b of described upper bearing (metal) meet: 0.6≤Hm/Hb≤1.4.
According to an embodiment of the present utility model, the height H m of described stator and the height H b of described upper bearing (metal) further meet: 0.9≤Hm/Hb≤1.1.
According to an embodiment of the present utility model, described housing comprises up and down all unlimited main casing, be located at the upper shell of described main casing upper end and be located at the lower shell body of described main casing lower end, the spatial volume defining between described external rotor electric machine and described upper shell is Vmu, the spatial volume defining between the maximum upper-end surface in described external rotor electric machine and described upper bearing (metal) and described cylinder is Vmd, wherein Vmu > Vmd.
According to an embodiment of the present utility model, the internal diameter that defines described housing is Dc, and the outer diameter D r of described rotor and the inner diameter D c of described housing meet: Dr/Dc≤0.95.
According to an embodiment of the present utility model, the outer diameter D r of described rotor and the inner diameter D c of described housing further meet: Dr/Dc≤0.7.
According to the refrigeration system of the utility model second aspect, comprise according to the rotary compressor described in the utility model first aspect.Due to good according to rotary compressor performance of the present utility model, thereby by this rotary compressor is set, can make the performance of refrigeration system be improved, and then can promote refrigerating efficiency and the heating efficiency of refrigeration system.
Additional aspect of the present utility model and advantage in the following description part provide, and part will become obviously from the following description, or recognize by practice of the present utility model.
Brief description of the drawings
Above-mentioned and/or additional aspect of the present utility model and advantage accompanying drawing below combination is understood becoming embodiment's description obviously and easily, wherein:
Fig. 1 is according to the structural representation of the utility model embodiment's rotary compressor;
Fig. 2 is according to the curve synoptic diagram of the Dr/Dcy of the utility model embodiment's rotary compressor and COP;
Fig. 3 is according to the curve synoptic diagram of the Hm/Hb of the utility model embodiment's rotary compressor and COP;
Fig. 4 is according to the curve synoptic diagram of the Dr/Dc of the utility model embodiment's rotary compressor and OCR.
Description of reference numerals
Compressor 100;
Housing 1; Cavity 11 is installed; Exhaust outlet of compressor 12; Main casing 13; Upper shell 14; Lower shell body 15;
Rotary part 2; Cylinder 21; Upper bearing (metal) 22; Lower bearing 23; Bent axle 24; Eccentric part 241; Piston 25;
Drive portion 3; External rotor electric machine 31; Stator 311; Rotor 312.
Embodiment
Describe embodiment of the present utility model below in detail, described embodiment's example is shown in the drawings, and wherein same or similar label represents same or similar element or has the element of identical or similar functions from start to finish.Be exemplary below by the embodiment who is described with reference to the drawings, only for explaining the utility model, and can not be interpreted as restriction of the present utility model.
In description of the present utility model, it will be appreciated that, term " on ", orientation or the position relationship of the instruction such as D score, " front ", " top ", " end ", " interior ", " outward " be based on orientation shown in the drawings or position relationship, only the utility model and simplified characterization for convenience of description, instead of indicate or imply that the device of indication or element must have specific orientation, construct and operation with specific orientation, therefore can not be interpreted as restriction of the present utility model.
In description of the present utility model, it should be noted that, unless otherwise clearly defined and limited, term " installation ", " being connected ", " connection " should be interpreted broadly, and for example, can be to be fixedly connected with, and can be also to removably connect, or connect integratedly; Can be to be directly connected, also can indirectly be connected by intermediary, can be the connection of two element internals or the interaction relationship of two elements.For the ordinary skill in the art, can understand as the case may be the concrete meaning of above-mentioned term in the utility model.
Describe according to the utility model embodiment's rotary compressor 100 below with reference to Fig. 1.As shown in Figure 1, comprise housing 1 according to the utility model embodiment's rotary compressor 100, housing 1 is enclosed construction, in housing 1, be limited with airtight installation cavity 11, housing 1 comprises up and down all unlimited main casing 13, be located at the upper shell 14 of main casing 13 upper ends and be located at the lower shell body 15 of main casing 13 lower ends, cavity 11 is wherein installed and jointly limited by main casing 13, upper shell 14 and lower shell body 15.Main casing 13 general arrangement become cylindrical shape.
Rotary part 2 and drive portion 3 are installed in installation cavity, rotary part 2 comprises cylinder 21, upper bearing (metal) 22, lower bearing 23, bent axle 24 and piston 25, and upper bearing (metal) 22 is located at cylinder 21 upper ends, and lower bearing 23 is located at cylinder 21 lower ends, drive portion 3 comprises motor, and motor is located at upper bearing (metal) 22 tops.
Bent axle 24 also upwards extends with drive portion 3 and is connected through lower bearing 23, cylinder 21 and upper bearing (metal) 22 successively from bottom to top.Bent axle 24 has eccentric part 241, and cylinder 21 has cylinder 21 chambeies, and piston 25 is set on eccentric part 241 and is contained in cylinder 21 chambeies.Be external rotor electric machine 31 according to the drive motor of the utility model embodiment's rotary compressor 100, external rotor electric machine 31 comprises stator 311 and rotor 312, and wherein, rotor 312 is rotatably located at the outside of stator 311.Bent axle 24 is fixedly connected with rotor 312, and rotor 312 is with dynamic crankshaft 24 to rotate in the process of rotation, and bent axle 24 and then drive piston 25 are rotated compression in cylinder 21.
No matter be the rotary compressor that inner rotor type motor is housed, the rotary compressor of external rotor electric machine is still housed, its performance, reliability are had to strict requirement.In existing routine techniques, the internal structure design of internal rotor rotary compressor is particularly ripe.Along with scientific and technological progress, external rotor rotary compressor is also in the middle of continuous Growth Development, and its inner component structural, size need to be optimized setting, to ensure the reliability of external rotor rotary compressor and to improve its performance index.The utility model proposes a kind of design of rotary compressor 100 about having external rotor electric machine 31 for this reason, for improving its performance and reliability.
Drive portion 3 and the rotary part 2 of rotary compressor 100 all have impact to the working efficiency of whole compressor 100, and drive portion 3 is connected with rotary part 2, drive portion 3 is for driving rotary part 2 to carry out work, refrigeration working medium being sucked, compresses, a series of actions such as discharge, thereby ensure the normal operation of whole refrigeration system.In order to make compressor 100 more efficient, performance is good, and in the external diameter of inventor of the present utility model to external rotor 312 in drive portion 3, rotary part 2, the internal diameter of cylinder 21 is studied.
Shown in Fig. 1: the internal diameter in definition cylinder 21 chambeies is Dcy, the external diameter of definition rotor 312 is Dr, wherein makes the inner diameter D cy in cylinder 21 chambeies and the outer diameter D r of rotor 312 meet: Dr/Dcy >=1.5.By making Dr/Dcy >=1.5, thereby can make the COP (coefficient of performance) of compressor 100 be improved.
Inventor of the present utility model, by many experiments and practice, draws the relation between the ratio of Dr/Dcy and the COP of compressor 100, and as shown in Figure 2, what in diagram, y coordinate showed is the COP value of corresponding compressor 100 in the time of different Dr/Dcy to example.As shown in Figure 2, the scope of Dr/Dcy is 1.4 to 1.5 o'clock, and the scope of COP is roughly 85%-87%, and COP is less than normal, and the performance of compressor 100 is not high.And in the time of Dr/Dcy >=1.5, the scope of COP is 87%-91%, now COP is greatly improved, and the performance of compressor 100 is improved.
To sum up, according to the utility model embodiment's rotary compressor 100, by the ratio control that is Dcy by the internal diameter in the outer diameter D r of the rotor 312 of external rotor 312 motors and cylinder 21 chambeies for being more than or equal at 1.5 o'clock, can make the COP value of compressor 100 improve, can make thus the performance of compressor 100 be improved widely, in the time being applied in refrigeration system according to this rotary compressor 100, can improve refrigeration or the heating efficiency of whole refrigeration system.
Advantageously, the inner diameter D cy in cylinder 21 chambeies and the outer diameter D r of rotor 312 further meet: 1.75≤Dr/Dcy≤2, and can make like this COP of compressor 100 further improve, the performance of compressor 100 is better.More advantageously, the inner diameter D cy in cylinder 21 chambeies and the outer diameter D r of rotor 312 further meet: 1.8≤Dr/Dcy≤1.85, thus, in all ratio ranges of Dr/Dcy, the COP of corresponding compressor 100 is for the highest, in the time that Dr/Dcy is 1.8 left and right, COP level is the highest, and Dr/Dcy is near 1.8 time, the fluctuation of COP level not quite and all can maintain higher level, and the performance of compressor 100 is best.
As shown in Figure 1, the rotary compressor 100 of implementing according to the utility model, the height of definition stator 311 is Hm, as shown in Figure 1, vertical distance between the lower end surface of stator 311 and upper-end surface is the height of stator 311, the height of definition upper bearing (metal) 22 is Hb, and the vertical distance between the lower end surface of upper bearing (metal) 22 and upper-end surface is the height of upper bearing (metal) 22.Wherein the height H b of the height H m of stator 311 and upper bearing (metal) 22 meets: 0.6≤Hm/Hb≤1.4.
In rotary compressor 100 of the present utility model, because motor is external rotor 312 formulas, the external diameter of rotor 312 is larger, therefore be more difficult to be supported than the little structure of 2 external diameters of rotary part, excessive in order to prevent rotary inertia excessive and when rotation centrifugal force, technician must well limit support to 2 of rotary parts.
Inventor of the present utility model, through many experiments and concrete practice, draws the relation between Hm/Hb and COP, as shown in Figure 3.In the time of upper bearing (metal) 22 excessive height, easily increase the friction power loss between upper bearing (metal) 22 and bent axle 24, cause COP to decline, if and upper bearing (metal) 22 is highly too low, 2 easy run-off the straights of rotary part, also can cause the power consumption between upper bearing (metal) 22 and bent axle 24 to increase, and then cause that COP declines, What is more, and the words that overbank is serious directly affect the reliability of compressor 100, causes compressor 100 wear out failures.Can find out according to Fig. 3, when Hm/Hb ratio interval is between [0.6,1.4] time, the COP level of its compressor 100 is higher, and in the time that Hm/Hb ratio exceeds this interval range, COP can reduce gradually.In the utility model, proposing thus Hm/Hb ratio interval is that [0.6,1.4] can make the Performance And Reliability of compressor 100 be guaranteed.Preferably, the height H b of the height H m of stator 311 and upper bearing (metal) 22 further meets: 0.9≤Hm/Hb≤1.1, can make the performance of compressor 100 be further improved thus.
As shown in Figure 1, according to the utility model embodiment's rotary compressor 100, spatial volume between definition external rotor electric machine 31 and upper shell 14 is Vmu, spatial volume between maximum upper-end surface in definition external rotor electric machine 31 and upper bearing (metal) 22 and cylinder 21 is Vmd, wherein Vmu > Vmd.Here it should be explained that, Vmu is the volume in the space that for example, limits between the horizontal plane (horizontal plane at the place, upper-end surface of stator 311 or rotor 312) at the place, upper-end surface of external rotor electric machine 31 and the inwall of upper shell 14 and the inner circle wall of part main casing 13.Vmd is divided into two kinds of situations, in the time that the upper-end surface of upper bearing (metal) 22 is greater than the upper-end surface of cylinder 21, Vmd is the volume in the space that for example, limits between the horizontal plane (horizontal plane at the place, lower end surface of stator 311 or rotor 312) at the place, lower end surface of external rotor electric machine 31 and the horizontal plane at place, upper-end surface of upper bearing (metal) 22 and the inner circle wall of part main casing 13; When the upper-end surface of upper bearing (metal) 22 is less than the upper-end surface of cylinder 21, Vmd is the volume in the space that for example, limits between the horizontal plane (horizontal plane at the place, lower end surface of stator 311 or rotor 312) at the place, lower end surface of external rotor electric machine 31 and the horizontal plane at place, upper-end surface of cylinder 21 and the inner circle wall of part main casing 13.
During compressor operation state, the surface of rotor external frame and stator line bag is the best body of the inner Oil-gas Separation of compressor, the gas mixture of high pressure impacts behind the surface of rotor external frame and stator line bag, can progressively separate, make oil be back to the oil sump of seal container bottom, in case upper shell of compressor 14 places' discharge oil masses are excessive, reduce the OCR (oil recycle ratio) of compressor.
In external rotor 312 rotary compressors 100 of the present utility model, its rotor 312 is more tending towards flattening with stator 311, and its rotor 312 is positioned at the outside of stator 311, and one section of stator 311 can be by rotor 312 structure institute envelopes.In the utility model schematic diagram 1, the longitudinal cross-section of rotor 312 is for just U-shaped, and the lower end surface line bag of stator 311 can be by envelope in rotor 312 inside, and when the longitudinal cross-section of rotor 312 is inverted U certainly, stator 311 upper end end face line bags can be by 312 envelopes of rotor.Therefore, in conjunction with this situation, by making the spatial volume between external rotor electric machine 31 and upper shell 14 be greater than the spatial volume between external rotor electric machine 31 and upper bearing (metal) 22, gas mixture can not only better be separated below motor like this, in the upper space of motor, again better separate simultaneously, oil content the gaseous mixture of discharging from exhaust outlet of compressor 12 like this can be well controlled, thereby the OCR that makes compressor 100 is controlled in the scope of reduction, and then can ensure compressor 100 performances and reliability.
In addition, the gap between outer wall and the inner walls of external rotor also affects the OCR of compressor, if the outer wall of external rotor and the gap of inner walls are too small, the mixed gas flow velocity that can cause flowing through is herein excessive, is difficult to make oil gas to be separated.For this reason, the internal diameter of definition housing 1 is Dc, that is to say, the internal diameter of definition main casing 13 is Dc, and the outer diameter D r of rotor 312 and the inner diameter D c of main casing 13 are met: Dr/Dc≤0.95,
In conventional design standard, the OCR of compressor should be controlled in 1.5%, inventor of the present utility model by experiment and practice drawn relation between Dr/Dc and OCR, as shown in Figure 4.In the time that Dr/Dc is positioned at 0.95, OCR is 1.5% substantially, and in the time that Dr/Dc is greater than 0.95, OCR has exceeded scope of design, therefore make Dr/Dc≤0.95 can make the OCR of compressor 100 meet design requirement, and in the time that Dr/Dc progressively reduces, the gap between external rotor 312 external diameters and main casing 13 is increasing, and OCR presents downward trend.Advantageously, controlling the outer diameter D r of rotor 312 and the inner diameter D c of main casing 13 further meets: Dr/Dc≤0.7, can make thus OCR be less than 0.5%, the oil mass of discharging from exhaust outlet of compressor 12 so still less, ensure the lubrication effect of all parts of compressor 100, improve the reliability of compressor 100.
According to other configuration examples of the utility model embodiment's rotary compressor 100 as cylinder 21, upper bearing (metal) 22, lower bearing 23, bent axle 24 etc. and operation be all known for those of ordinary skills, here no longer describe in detail.
The utility model has also proposed a kind of refrigeration system, this refrigeration system comprises according to the utility model first aspect embodiment's rotary compressor 100, the outlet of compressor 100 is connected with condenser, condenser is connected with vaporizer after being connected with throttling arrangement again, and the outlet of vaporizer is connected to form refrigeration system circulation with the entrance of compressor 100.Wherein refrigeration system refrigerant used is any one in HCFC, HFC, HC class.Due to good according to rotary compressor 100 performances of the present utility model, thereby by this rotary compressor 100 is set, can make the performance of refrigeration system be improved, and then can promote refrigerating efficiency and the heating efficiency of refrigeration system.
In the description of this specification, the description of reference term " embodiment ", " some embodiments ", " illustrative examples ", " example ", " concrete example " or " some examples " etc. means to be contained at least one embodiment of the present utility model or example in conjunction with specific features, structure, material or the feature of this embodiment or example description.In this manual, the schematic statement of above-mentioned term is not necessarily referred to identical embodiment or example.And specific features, structure, material or the feature of description can be with suitable mode combination in any one or more embodiments or example.
Although illustrated and described embodiment of the present utility model, those having ordinary skill in the art will appreciate that: in the situation that not departing from principle of the present utility model and aim, can carry out multiple variation, amendment, replacement and modification to these embodiments, scope of the present utility model is limited by claim and equivalent thereof.
Claims (9)
1. a rotary compressor, is characterized in that, comprising:
Housing, is limited with airtight installation cavity in described housing;
Cylinder, described cylinder is located in described installation cavity, and described cylinder has cylinder chamber, and the internal diameter that defines described cylinder chamber is Dcy;
Upper bearing (metal), described upper bearing (metal) is located at described cylinder upper end; And
External rotor electric machine, described external rotor electric machine is located in described installation cavity and is positioned at the top of described upper bearing (metal), described external rotor electric machine comprises stator and is rotatably located at the rotor of described stator outside, the external diameter that defines described rotor is Dr, and the inner diameter D cy of described cylinder chamber and the outer diameter D r of described rotor meet: Dr/Dcy >=1.5.
2. rotary compressor according to claim 1, is characterized in that, the inner diameter D cy of described cylinder chamber and the outer diameter D r of described rotor further meet: 1.75≤Dr/Dcy≤2.
3. rotary compressor according to claim 2, is characterized in that, the inner diameter D cy of described cylinder chamber and the outer diameter D r of described rotor further meet: 1.8≤Dr/Dcy≤1.85.
4. rotary compressor according to claim 1, is characterized in that, the height that defines described stator is Hm, and the height that defines described upper bearing (metal) is Hb, and the height H m of described stator and the height H b of described upper bearing (metal) meet: 0.6≤Hm/Hb≤1.4.
5. rotary compressor according to claim 4, is characterized in that, the height H m of described stator and the height H b of described upper bearing (metal) further meet: 0.9≤Hm/Hb≤1.1.
6. rotary compressor according to claim 1, is characterized in that, described housing comprises up and down all unlimited main casing, be located at the upper shell of described main casing upper end and be located at the lower shell body of described main casing lower end,
The spatial volume defining between described external rotor electric machine and described upper shell is Vmu, and the spatial volume defining between the maximum upper-end surface in described external rotor electric machine and described upper bearing (metal) and described cylinder is Vmd, wherein Vmu > Vmd.
7. rotary compressor according to claim 1, is characterized in that, the internal diameter that defines described housing is Dc, and the outer diameter D r of described rotor and the inner diameter D c of described housing meet: Dr/Dc≤0.95.
8. rotary compressor according to claim 7, is characterized in that, the outer diameter D r of described rotor and the inner diameter D c of described housing further meet: Dr/Dc≤0.7.
9. a refrigeration system, is characterized in that, comprises according to the rotary compressor described in any one in claim 1-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420324403.7U CN203962398U (en) | 2014-06-17 | 2014-06-17 | Rotary compressor and the refrigeration system with it |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420324403.7U CN203962398U (en) | 2014-06-17 | 2014-06-17 | Rotary compressor and the refrigeration system with it |
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| Publication Number | Publication Date |
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| CN203962398U true CN203962398U (en) | 2014-11-26 |
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| CN201420324403.7U Active CN203962398U (en) | 2014-06-17 | 2014-06-17 | Rotary compressor and the refrigeration system with it |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105275811A (en) * | 2014-06-17 | 2016-01-27 | 广东美芝制冷设备有限公司 | Rotary compressor and refrigeration system with rotary compressor |
| CN105909524A (en) * | 2016-06-01 | 2016-08-31 | 珠海格力节能环保制冷技术研究中心有限公司 | Compressor |
| CN109923308A (en) * | 2016-11-10 | 2019-06-21 | 大金工业株式会社 | It can inhibit the compressor of the discharge of refrigerator oil |
-
2014
- 2014-06-17 CN CN201420324403.7U patent/CN203962398U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105275811A (en) * | 2014-06-17 | 2016-01-27 | 广东美芝制冷设备有限公司 | Rotary compressor and refrigeration system with rotary compressor |
| CN105909524A (en) * | 2016-06-01 | 2016-08-31 | 珠海格力节能环保制冷技术研究中心有限公司 | Compressor |
| CN105909524B (en) * | 2016-06-01 | 2018-05-18 | 珠海格力节能环保制冷技术研究中心有限公司 | Compressor |
| CN109923308A (en) * | 2016-11-10 | 2019-06-21 | 大金工业株式会社 | It can inhibit the compressor of the discharge of refrigerator oil |
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