CN103541902A - Rotary type compressor with low-back-pressure shell - Google Patents
Rotary type compressor with low-back-pressure shell Download PDFInfo
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- CN103541902A CN103541902A CN201210237914.0A CN201210237914A CN103541902A CN 103541902 A CN103541902 A CN 103541902A CN 201210237914 A CN201210237914 A CN 201210237914A CN 103541902 A CN103541902 A CN 103541902A
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- back pressure
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- 230000006835 compression Effects 0.000 claims abstract description 8
- 238000007906 compression Methods 0.000 claims abstract description 8
- 239000002184 metal Substances 0.000 claims description 16
- 238000005096 rolling process Methods 0.000 claims description 8
- 239000003507 refrigerant Substances 0.000 claims description 7
- 238000005266 casting Methods 0.000 claims description 3
- 238000004080 punching Methods 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 150000004649 carbonic acid derivatives Chemical class 0.000 claims description 2
- 150000008282 halocarbons Chemical class 0.000 claims description 2
- 150000002430 hydrocarbons Chemical class 0.000 claims description 2
- 238000007493 shaping process Methods 0.000 claims 1
- 239000003921 oil Substances 0.000 description 13
- 238000005057 refrigeration Methods 0.000 description 5
- 239000003795 chemical substances by application Substances 0.000 description 4
- 238000001816 cooling Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 230000004087 circulation Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 230000001839 systemic circulation Effects 0.000 description 1
- 239000010913 used oil Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Abstract
The invention discloses a rotary type compressor with a low-back-pressure shell. The rotary type compressor comprises a motor part and a movement mechanism which are arranged in a sealed container, wherein the sealed container consists of a shell, an upper cover and a lower cover; the motor part comprises a stator and a rotor; the movement mechanism consists of a compression mechanism and a supporting component; the compression mechanism comprises a cylinder, a piston arranged in the cylinder, a sliding sheet and a crankshaft as well as an upper bearing and a lower bearing which are used for supporting the crankshaft and forming a compression space with the cylinder; the compression mechanism also comprises an air suction pipe and an air exhaust pipe which are communicated with an inner space of a compressor; the air exhaust pipe is communicated with an oil separator arranged outside the shell; the supporting component comprises a first support and a second support; the first support is arranged between the upper bearing and the lower bearing; the second support is arranged at the upper part of the motor part and is pressed against the top end of the crankshaft. A first support structure and a second support structure are arranged in the rotary type compressor with the low-back-pressure shell, so that the diameter of the crankshaft can be reduced; therefore, the power consumption during running of the compressor can be reduced, the efficiency of the compressor can be improved, and the reliability of the compressor is improved.
Description
Technical field
The present invention relates to a kind of rotary compressor, relate in particular to a kind of rotary compressor of casing of low back pressure.
Background technique
It is high back pressure structure that the rotary compressor now extensively adopting all adopts housing inner high voltage power, the refrigeration agent of getting back to compressor from system is by gas-liquid separator, the refrigeration agent of gaseous state is directly drawn into completes compression in cylinder, high-temperature high-pressure refrigerant after overcompression is drained into compressor space, after cooling motor, discharge compressor, enter systemic circulation.
Rotary compressor with respect to high back pressure structure, exist in a kind of housing is low-pressure structure, it is the low back-pressure structure rotary compressor being communicated with pressure of inspiration(Pi) in housing, the compressor of this structure is compared high back pressure structure in some applications, particularly in following rotary compressor application, there is special advantage: 1. when using flammable alternative refrigerant, because refrigerant charge is restricted, adopt low back pressure compressor can significantly reduce the amount of refrigerant in compressor, thereby expand the application area .2. of combustible refrigerant when using CO2 as refrigeration agent, because CO2 exists working pressure high, adopt low back-pressure structure can reduce the working pressure in compressor housing, thereby reduce the withstand voltage security requirement of housing, reduce the cost of compressor and improve manufacturability.3. under the high application conditions of compressor exhaust temperature, as adopt R32 refrigeration agent or use under T3 operating mode or while using under the heat pump water heater system moderate condition of high water-exit temperature, because the motor of low back pressure compressor is positioned under air-breathing environment, there will not be the too high phenomenon of motor temperature while using in high back pressure compressor to occur, guaranteed the reliability of compressor etc., although also can solve by other technological means when the problems referred to above are applied in high back pressure structure, but all inevitably can bring such as cost and rise, the side effect such as structure complicated and hydraulic performance decline.Therefore,, along with the technical development of refrigeration industry and the expanded application of compressor, the low back pressure compressor of low back pressure compressor, particularly large discharge capacity will be widely used in these fields.
Yet, although the compressor of low back-pressure structure has obtained application very widely on the reciprocating structure on refrigerator and the scroll compressor on commercial air conditioning system, yet, be applied in rotary compressor structure, at present still in conceptual phase, fail to reach the requirement of practical application, comprehensive, compare high back pressure structure, rotary compressor still has some problems to be resolved when the low back-pressure structure of application, wherein, comprise the difference of performance and the integrity problem of bent axle.Because rotary compressor is the fully closed compressor of electric machine built-in, motor needs cooling heat dissipation, and the motor of low back pressure compressor is arranged in air aspiration cavity, therefore, air-breathing in compressor, meeting is by motor heating, and it is invalid overheated to form, thereby has influence on the efficiency of compressor and system.Along with energy-efficient requirement is more and more higher, need corresponding technological means to improve the performance of low back pressure compressor, improve the feasibility of low back pressure compressor application.In addition, in low back pressure compressor, because oil sump is arranged in environment under low pressure, while adopting present widely used oil supply structure, and piston inner diameter is due to the impact of revealing, pressure can, a little more than oil sump pressure, cause the oil supply system ability that oils of bent axle endoporus to reduce, the fuel delivery higher back pressure structure of friction pair between upper bearing (metal) and bent axle is obviously reduced, bring the obvious serious problem of wearing and tearing higher back pressure structure of axle and bearing.Especially, on the large discharge capacity machine more having superiority in low back pressure compressor application, in order to guarantee the performance of compressor, compare the increase of discharge capacity, the increase of the diameter of axle of bent axle is generally not too large, thereby under the load of large discharge capacity machine, the run stability of bent axle is relative with reliability more severe, hide some dangers for to the extensive use of large discharge capacity machine.Therefore, be necessary to be further improved.
Summary of the invention
Object of the present invention aims to provide a kind of reduction compressor friction power loss, strengthens compressor operating reliability, promotes the rotary compressor of the casing of low back pressure of compressor performance, to overcome deficiency of the prior art.
By the rotary compressor of a kind of casing of low back pressure of this object design, comprise the motor portion and the motion that are arranged in seal container, wherein seal container is comprised of housing, upper cover and lower cover, motor portion comprises stator and rotor, motion is comprised of compressing mechanism and supporting part, wherein compressing mechanism comprises cylinder, is arranged on piston, slide plate and bent axle in cylinder, and supports bent axle and form upper bearing (metal) and the lower bearing of compression volume with cylinder; Also comprise the sucking pipe and the outlet pipe that are communicated with compressor inner space respectively, outlet pipe is communicated with the oil separator outside housing, its structure characteristic is, supporting part comprises the first support and the second support, described the first support is arranged between upper bearing (metal) and lower bearing, and described the second support is arranged at motor portion top and offsets with bent axle top.
Described the second support comprises support and the bearing rack-mount and that coordinate with the formation of bent axle top being connected with housing; The described second bearing supporting is connected by core-regulating mechanism with support, and this core-regulating mechanism comprises tapped hole, the aligning screw being arranged on support, and is arranged on bearing and the diameter corresponding with tapped hole is greater than the through hole in the large footpath of aligning screw; The described second support supporting is that metal punching is shaped or is casting forming, and described support is being provided with flange with the edge of housing joint.
Described support Y-shaped or cross or star; Described bearing Y-shaped or cross or star.
The described second support vertical supporting is S in the cross-section area of bent axle, and wherein, the pass of the maximum cross-section area Smax and housing internal diameter area of a circle S1 is: Smax≤0.75*S1.
The described second bearing supporting and the length of auxiliary section, bent axle top are K, the relation between this length of thread engagement K and bent axle top diameter D1: K≤1.2*D1; The diameter of axle that is positioned at cylinder upper end of bent axle comprises the diameter of axle D2 coordinating with upper bearing (metal) internal diameter, the diameter of axle D3 coordinating with rotor internal diameter, and tri-sections of the diameter D1 coordinating with the bearing bore diameter of the second support, wherein, D1≤D3≤D2.
Described supporting part and housing, for being welded to connect, are welded to connect quantity m >=3 a little.
Described sucking pipe is arranged on upper cover middle part, and at compressor inside opening the region, auxiliary section towards the second support and bent axle; Described sucking pipe is L, wherein L >=8mm in open end distance second support of compressor inside with the distance of the upper-end surface of bearing fit.
Described second support with bent axle between adopt rolling bearing to coordinate; Described rolling bearing is selfaligning ball bearing or selfaligning roller bearing.
Between the described second bearing bore diameter supporting and bent axle top, there is matching gap d, on described bearing bore diameter, be provided with oil groove; Described matching gap d is the poor of described bearing bore diameter D2 and described bent axle top end diameter D1, wherein d≤0.8mm.
The refrigerant type of described compressor compresses is carbonic acid class gas or hydrocarbon compound or flammable halogenated hydrocarbon compound.
The present invention arranges the first support and the second supporting structure by the rotary compressor inside at casing of low back pressure, can reduce the diameter of bent axle, thereby reduces the power consumption of compressor operation, improves the efficiency of compressor, has improved the reliability of compressor.
Accompanying drawing explanation
Fig. 1 is the first embodiment's low back pressure compressor structural representation;
Fig. 2 is the second embodiment's low back pressure compressor structural representation;
Fig. 3 is the structural representation of the second support supporting in the first embodiment;
Fig. 4 is the generalized section of the bearing of the second support;
Fig. 5 is the structural representation of the second bearing supporting in the first embodiment;
Fig. 6 is the second structural representation supporting with the auxiliary section of bent axle in the first embodiment.
In figure: 1 is compressor inner space, 11 is upper cover, and 12 is housing, 13 is lower cover, and 14 is stator, and 15 is rotor, 16 is sucking pipe, and 17 is outlet pipe, and 18 is oil separator, 21 is upper bearing (metal), and 22 is cylinder, and 23 is piston, 24 is slide plate, and 25 is lower bearing, and 26 is bent axle, 31 is support, and 32 is bearing, and 33 is aligning screw, 34 is rolling bearing, 35 is tapped hole, and 36 is through hole, and 37 is oil groove, A is the first support, B is the second support, and K is bearing and bent axle auxiliary section width, and L is that sucking pipe lower end surface is apart from bearing auxiliary section distance.
Embodiment
Below in conjunction with drawings and Examples, the invention will be further described.
The first embodiment
Referring to Fig. 1, a kind of rotary compressor of casing of low back pressure, comprise the motor portion and the motion that are arranged in seal container, wherein seal container is comprised of housing 12, upper cover 11 and lower cover 13, motor portion comprises stator 14 and rotor 15, motion is comprised of compressing mechanism and supporting part, and wherein compressing mechanism comprises cylinder 22, is arranged on piston 23, slide plate 24 and bent axle 26 in cylinder 22, and supports bent axle 26 and form upper bearing (metal) 21 and the lower bearing 25 of compression volumes with cylinder 22; Also comprise the sucking pipe 16 and the outlet pipe 17 that are communicated with compressor inner space 1 respectively, outlet pipe 17 is communicated with the oil separator 18 outside housing 12, supporting part comprises that the first support A and second supports B, first supports A is arranged between upper bearing (metal) 21 and lower bearing 25, and second supports B is arranged at motor portion top and offsets with bent axle 26 tops.
Second supports B comprises the support 31 being connected with housing 12 and forms with bent axle 26 tops the bearing 32 coordinating, and bearing 32 is connected by screw 33 with support 31.This second bearing 32 that supports B matches with the top of bent axle 26, form gear mechanism, wherein, the length of this auxiliary section is K, and, in order to optimize length of thread engagement K to reduce friction power loss under the prerequisite of reliability that guarantees auxiliary section, K setting is here K≤1.2*D1 with the pass of the bent axle 26 diameter D1 that match.
Between bearing 32 internal diameters of the second support B and bent axle 26 tops, have matching gap d, this matching gap d is the poor of bearing 32 inner diameter D 4 and bent axle 26 top end diameter D1, and has requirement d≤0.8mm.And the second bearing 32 supporting is connected by core-regulating mechanism with support 31, this core-regulating mechanism comprises tapped hole 35, the aligning screw 33 being arranged on support 31, and be arranged on bearing 32 and through hole 36 that the diameter corresponding with above-mentioned tapped hole 35 is greater than aligning screw 33 large footpaths forms, by adjusting bearing 32, adjust matching gap d with the relative position of support 31, and guarantee the even of gap d, make the running of bent axle 26 more smooth and easy.And, on bearing 32 internal diameters, be also provided with oil groove 37, can make the air-breathing lubricant oil providing can reach smoothly whole matching gap d, thereby improve the lubrication state of fitting surface.
The diameter of axle that is positioned at cylinder 22 upper ends of bent axle 26 comprises the diameter of axle D2 coordinating with upper bearing (metal) 21 internal diameters, the diameter of axle D3 coordinating with rotor 15 internal diameters, tri-sections of the diameter D1 coordinating with bearing 32 internal diameters of the second support B, wherein, D1 < D3 < D2, like this, during compressing mechanism assembling, upper bearing (metal) 21 can assemble more smoothly, the more important thing is, when D1 < D2, can reduce the friction area between the bearing 32 of the second support B and the internal diameter of bent axle 26, thereby reduction power consumption, D3 < D2 can increase the sectional area of rotor 15, improve the efficiency of motor.
At upper cover 11 middle parts, be provided with sucking pipe 16, the distance of the upper-end surface that the open end distance second support B of sucking pipe 16 in compressor inside coordinates with bearing 32 is L, wherein, L >=8mm, like this, the noise problem that can avoid distance too closely to bring, can also guarantee that the oil of returning from sucking pipe 16 can be distributed in whole matching gap d.
In addition, the first support A and second supports B and is welding with the mode that housing 12 is connected, and, be welded to connect a little quantity m=3, can guarantee that manufacturability and second supports the installation reliability of B.And the support 31 of the second support B is S perpendicular to the cross-section area of the running shaft place plane of bent axle 26, wherein, the pass of the maximum cross-section area Smax and main casing internal diameter area of a circle S1 is: Smax≤0.75*S1, and to guarantee the smooth and easy of air-breathing circulation.And the shape of the cross section of above-mentioned support 31 is Y-shaped, and the structure that bearing 32 also presents Y shape accordingly coordinates with it.
In the present embodiment, the second support 31 that supports B is made for metal punching is shaped, simple and reliable process, and, support 31 has all carried out processing with bearing 32 surfaces, auxiliary section to be processed, and to improve quality of fit, guarantees the uniformity of the matching gap d of bearing 32 and bent axle 26.And support 31 is being provided with flange with the edge of housing 12 joints, improve the width of support 31 and housing 12 cooperation places, improve manufacturability.
The second embodiment
In the present embodiment, the diameter D1=D2=D3 of bent axle 26 upper-end part of drivings, like this, can make the structure of bent axle 26 simpler.In addition, the second shape of cross section that supports the support 31 of B is cross, now, and the quantity m=4 of soldering point.
Inner diameter D 4 places at the bearing 32 of the second support B are provided with rolling bearing 34, make bearing 32 form rolling friction with bent axle 26 and coordinate, improve andfrictional conditions, improve auxiliary section reliability, reduce friction power loss, the performance of raising compressor.
The second support 31 that supports B forms for processing and fabricating after casting forming, and, be greater than the thickness with bearing 32 cooperation places with the width of housing 12 cooperation places, there is same effect with the flange of sheet metal support in above-described embodiment 1.All the other are identical with the first embodiment, repeat no more.
The 3rd embodiment
In the present embodiment, the second shape of cross section that supports the support 31 of B is star, and all the other are identical with the first embodiment, repeat no more.
The 4th embodiment
In the present embodiment, the rolling bearing 34 that is arranged on bearing 32 inner diameter D 4 is self-aligning bearing, and all the other are identical with embodiment two, repeat no more.
Above-described embodiment has only been listed representative case study on implementation, and all the other are the various combining forms explanation no longer one by one of various technical characteristicss in the above-described embodiments.In addition, some technology point exists and is easy to association or simply changes available object scheme consistent with the present invention, as the shape of support 32 changes T font into, or selfaligning bearing is selfaligning ball bearing or selfaligning roller bearing, or other structural type of low back pressure compressor is as built-in in oil separator 18 or double-cylinder structure etc., also explanation no longer one by one.
Claims (10)
1. the rotary compressor of a casing of low back pressure, comprise the motor portion and the motion that are arranged in seal container, wherein seal container is by housing (12), upper cover (11) and lower cover (13) form, motor portion comprises stator (14) and rotor (15), motion is comprised of compressing mechanism and supporting part, wherein compressing mechanism comprises cylinder (22), be arranged on the piston (23) in cylinder (22), slide plate (24) and bent axle (26), and support bent axle (26) and form upper bearing (metal) (21) and the lower bearing (25) of compression volume with cylinder (22), also comprise the sucking pipe (16) and the outlet pipe (17) that are communicated with compressor inner space (1) respectively, outlet pipe (17) oil separator (18) outer with housing (12) is communicated with, it is characterized in that, supporting part comprises the first support and the second support, described the first support is arranged between upper bearing (metal) (21) and lower bearing (25), and described the second support is arranged at motor portion top and offsets with bent axle (26) top.
2. the rotary compressor of casing of low back pressure according to claim 1, it is characterized in that, described second supports the bearing (32) that comprises the support (31) being connected with housing (12) and be arranged on support (31) above and coordinate with the formation of bent axle (26) top; The described second bearing (32) supporting is connected by core-regulating mechanism with support (31), this core-regulating mechanism comprises tapped hole (35), the aligning screw (33) being arranged on support (31), and is arranged on the upper and diameter corresponding with tapped hole (35) of bearing (32) and is greater than aligning screw (33) through hole (36) in footpath greatly; The described second support (31) supporting is for metal punching shaping or be casting forming, and described support (31) is being provided with flange with the edge of housing (12) joint.
3. the rotary compressor of casing of low back pressure according to claim 2, is characterized in that, described support (31) Y-shaped or cross or star; Described bearing (32) Y-shaped or cross or star.
4. the rotary compressor of casing of low back pressure according to claim 2, it is characterized in that, the described second support (31) supporting is S perpendicular to the cross-section area of bent axle (26), and wherein, the pass of the maximum cross-section area Smax and housing (12) internal diameter area of a circle S1 is: Smax≤0.75*S1.
5. the rotary compressor of casing of low back pressure according to claim 2, it is characterized in that, the described second bearing (32) supporting is K with the length of bent axle (26) auxiliary section, top, the relation between this length of thread engagement K and bent axle (26) top diameter D1: K≤1.2*D1; The diameter of axle that is positioned at cylinder (22) upper end of bent axle (26) comprises the diameter of axle D2 coordinating with upper bearing (metal) (21) internal diameter, the diameter of axle D3 coordinating with rotor (15) internal diameter, tri-sections of the diameter D1 coordinating with bearing (32) internal diameter of the second support, wherein, D1≤D3≤D2.
6. the rotary compressor of casing of low back pressure according to claim 1, is characterized in that, described supporting part and housing (12), for being welded to connect, are welded to connect quantity m >=3 a little.
7. according to the rotary compressor of casing of low back pressure described in claim 1-6 any one, it is characterized in that, described sucking pipe (16) is arranged on upper cover (11) middle part, and at compressor inside opening the region, auxiliary section towards the second support and bent axle (26); The distance that the open end distance second of described sucking pipe (16) in compressor inside supports the upper-end surface coordinating with bearing (32) is L, wherein L >=8mm.
8. the rotary compressor of casing of low back pressure according to claim 1, is characterized in that, described second support with bent axle (26) between adopt rolling bearing (34) to coordinate; Described rolling bearing (34) is selfaligning ball bearing or selfaligning roller bearing.
9. the rotary compressor of casing of low back pressure according to claim 2, is characterized in that, between the second bearing (32) internal diameter supporting and bent axle (26) top, has matching gap d, on described bearing (32) internal diameter, is provided with oil groove (37); Described matching gap d is the poor of described bearing (32) inner diameter D 2 and described bent axle (26) top end diameter D1, wherein d≤0.8mm.
10. the rotary compressor of casing of low back pressure according to claim 1, is characterized in that, the refrigerant type of compressor compresses is carbonic acid class gas or hydrocarbon compound or flammable halogenated hydrocarbon compound.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210237914.0A CN103541902A (en) | 2012-07-10 | 2012-07-10 | Rotary type compressor with low-back-pressure shell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210237914.0A CN103541902A (en) | 2012-07-10 | 2012-07-10 | Rotary type compressor with low-back-pressure shell |
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| Publication Number | Publication Date |
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| CN103541902A true CN103541902A (en) | 2014-01-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210237914.0A Pending CN103541902A (en) | 2012-07-10 | 2012-07-10 | Rotary type compressor with low-back-pressure shell |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104165142A (en) * | 2014-08-01 | 2014-11-26 | 广东美芝制冷设备有限公司 | Rotary compressor |
| CN104481877A (en) * | 2014-12-09 | 2015-04-01 | 广东美芝制冷设备有限公司 | Low-back-pressure rotary compressor |
| CN104728107A (en) * | 2013-12-24 | 2015-06-24 | 珠海凌达压缩机有限公司 | Motor shaft assembly and compressor |
| CN105156328A (en) * | 2015-09-28 | 2015-12-16 | 上海日立电器有限公司 | Rotary compressor |
| CN105201844A (en) * | 2015-10-22 | 2015-12-30 | 广东美芝制冷设备有限公司 | Rotary compressor |
| CN106862876A (en) * | 2017-03-27 | 2017-06-20 | 广东美芝制冷设备有限公司 | The processing technology of the upper housing component of compressor and the upper housing component of compressor |
| CN109072917A (en) * | 2016-09-14 | 2018-12-21 | 东芝开利株式会社 | Rotary compressor and refrigerating circulatory device |
| CN113864156A (en) * | 2021-10-28 | 2021-12-31 | 珠海格力电器股份有限公司 | Reciprocating compressor |
| CN114087177A (en) * | 2021-12-08 | 2022-02-25 | 珠海格力节能环保制冷技术研究中心有限公司 | Rotary fluid machinery |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104728107A (en) * | 2013-12-24 | 2015-06-24 | 珠海凌达压缩机有限公司 | Motor shaft assembly and compressor |
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| CN105201844A (en) * | 2015-10-22 | 2015-12-30 | 广东美芝制冷设备有限公司 | Rotary compressor |
| CN109072917A (en) * | 2016-09-14 | 2018-12-21 | 东芝开利株式会社 | Rotary compressor and refrigerating circulatory device |
| CN106862876A (en) * | 2017-03-27 | 2017-06-20 | 广东美芝制冷设备有限公司 | The processing technology of the upper housing component of compressor and the upper housing component of compressor |
| CN113864156A (en) * | 2021-10-28 | 2021-12-31 | 珠海格力电器股份有限公司 | Reciprocating compressor |
| CN113864156B (en) * | 2021-10-28 | 2023-01-17 | 珠海格力电器股份有限公司 | A reciprocating compressor |
| CN114087177A (en) * | 2021-12-08 | 2022-02-25 | 珠海格力节能环保制冷技术研究中心有限公司 | Rotary fluid machinery |
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Application publication date: 20140129 |