CN103850919A - Piston of linear compressor and linear compressor - Google Patents

Piston of linear compressor and linear compressor Download PDF

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Publication number
CN103850919A
CN103850919A CN201310408457.1A CN201310408457A CN103850919A CN 103850919 A CN103850919 A CN 103850919A CN 201310408457 A CN201310408457 A CN 201310408457A CN 103850919 A CN103850919 A CN 103850919A
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CN
China
Prior art keywords
piston
linear compressor
magnetic
piston rod
cylinder
Prior art date
Application number
CN201310408457.1A
Other languages
Chinese (zh)
Inventor
闫赛娜
李衡国
赵志强
宋斌
李孟成
许升
李标
Original Assignee
海尔集团公司
海尔集团技术研发中心
青岛海尔股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to CN201210509174.1 priority Critical
Priority to CN201210509174 priority
Application filed by 海尔集团公司, 海尔集团技术研发中心, 青岛海尔股份有限公司 filed Critical 海尔集团公司
Priority to CN201310408457.1A priority patent/CN103850919A/en
Publication of CN103850919A publication Critical patent/CN103850919A/en

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Abstract

The invention discloses a piston of a linear compressor and the linear compressor comprising the piston. At least part of the overlapped part of the projection of the piston on at least one plane of the axis of the piston and the projection of an inner stator of a motor in the plane is made of a nonmagnetic or nonmagnetic and nonconductive material, so that a magnetic field produced by a coil is not cut by the moving piston, magnetic losses are not caused, the working efficiency of the linear compressor is greatly improved and the electric energy is saved. Besides, since the nonmagnetic or nonmagnetic and nonconductive material is lighter than common material, the overall weight of the piston and the compressor is reduced, more energy can be used for doing compression work and the energy utilization ratio is further improved.

Description

The piston of linear compressor and linear compressor

Technical field

The present invention relates to linear compressor technical field, specifically, is a kind of piston structure of linear compressor and the linear compressor that has used this piston.

Background technique

As shown in Figure 1, Linearkompressor has shell 7 conventionally, in the cavity surrounding, receives cylindrical circular external stator 2 and inner stator 1 are housed at this shell 7, and wherein, inner stator 1 is in external stator 2 and both be axially consistent.In external stator 2 and inner stator 1 the two interval forming, be provided with mover 5, this mover 5 is conventionally by being positioned at the magnet 51 at this interval and forming in order to the mover support 52 of fixing this magnet 51.Right-hand member (corresponding to the right side in Fig. 1) at inner stator 1 is provided with cylindrical circular cylinder 12, and this cylinder 12 is fixed on forward flange 11, and by exhaust valve plate, cylinder 12 is sealed.Cylinder 12 keeps coaxial setting with inner stator 1, in the interior receipts of cylinder 12, piston 9 is housed, and jointly surrounds a chamber be compression chamber by this piston 9, cylinder 12 and exhaust valve plate.Piston 9 links together with mover support 52.In shell 7, be fixed with in the left end (corresponding to the left side in Fig. 1) of inner stator 1 backboard 10 that restriction mover 5 continues to move to the left, between backboard 10 and mover support 52, be provided with spring 8.

In inner stator 1, be provided with coil 4, in the time that coil 4 is switched on, magnetic intensity and the direction in the magnetic field that inner stator 1 and external stator 2 form change, under the effect of magnetic force, mover 5 moves back and forth along its axial (being left and right directions in Fig. 1), this mover 5 drives piston 9 along axially the moving back and forth of cylinder 12, thereby by piston 9, the refrigerant gas in compression chamber is compressed to realize refrigeration.Piston 9 and mover 5 connect into an entirety, and in compressor operation, the two moving direction is consistent and need carries out high-frequency reciprocating motion.Because piston 9 moves along the high-frequency reciprocating that axially carries out of inner stator 1, in its movement process, piston 9 internal face easy and cylinder 12 or inner stator 1 produces wearing and tearing, causes reduce the working life of piston 9.

In order to ensure the wear resistance of piston 9, in prior art, be all generally to adopt metallic material to make.And due to the restriction of linear compressor structure, piston or piston rod need to pass through motor center, and motor center is owing to being the most intensive place, magnetic field.Therefore, in magnetic field, the parts of any magnetic conduction conduction all can be because the variation in magnetic field produces eddy current loss therein, and the impact that lose in the special place intensive in magnetic field is more obvious.

Summary of the invention

The technical problem to be solved in the present invention is to provide a kind of piston that can effectively reduce magnetic loss, raising compressor efficiency, and has used the linear compressor of this piston.

In order to solve the problems of the technologies described above, the invention provides a kind of piston of linear compressor, at least a portion of the overlapping part of the projection of the inner stator of the projection of described piston at least one plane at piston axes place and motor in this plane is made up of non-magnetic or non-magnetic non-conducting material.

Further, described piston and mover are one-body molded.

Further, described piston connects together after moulding respectively with mover.

Further, one end outer wall of described piston on compression direction is coated with the sleeve of being made up of high-abrasive material.

Further, described sleeve by bonding, welding, screw fix, screw-nut fixes or the mode of interference fit is fixed to one end outer wall of described piston on compression direction; Or form by one end outer wall spraying abrasion-proof coating in piston compression direction.

Further, described piston comprises piston rod and the piston head that is connected to piston rod one end, and wherein, described piston rod is made up of non-magnetic or non-magnetic non-conducting material; Described piston head is made up of high-abrasive material.

Further, between described piston head and piston rod, be connected by the mode that bonding, welding, screw are fixed or screw-nut is fixing.

Further, wherein said non-magnet material is epoxy resin glass, PPS, PEEK plastics or aluminum alloy; Described non-magnetic non-conducting material is epoxy resin glass, PPS or PEEK plastics.

Further, outer wall away from one end of cylinder on described piston or piston rod is arranged with bearing, between described piston or piston rod and described bearing, be provided with wear-resisting cylinder, this wear-resisting cylinder be fixed on described piston or piston rod and can with described bearing relative movement.

The present invention also provides a kind of linear compressor that includes above-mentioned piston.

In the present invention, the inner stator of the projection of piston at least one plane at piston axes place and motor is made up of non-magnetic or non-magnetic non-conducting material in the overlapping part of the projection in this plane part at least, make the piston cutting that magnetic field that coil produces can passive movement, just can not produce magnetic loss yet, greatly improve the working efficiency of linear compressor, saved electric energy.In addition, because non-magnetic or non-magnetic non-conducting material is generally all low weight, therefore the present invention has also reduced the overall weight of piston and compressor, makes energy more for compressed action, has further improved energy utilization rate.

Brief description of the drawings

Fig. 1 is the overall structure schematic diagram of compressor in prior art.

Fig. 2 is linear compressor the first embodiment's of the present invention structural representation.

Fig. 3 is linear compressor the second embodiment's of the present invention structural representation.

Fig. 4 is linear compressor of the present invention the 3rd embodiment's structural representation.

Fig. 5 is linear compressor of the present invention the 4th embodiment's structural representation.

Fig. 6 is linear compressor of the present invention the 5th embodiment's structural representation.

Fig. 7 is linear compressor of the present invention the 6th embodiment's structural representation.

Fig. 8 is linear compressor of the present invention the 7th embodiment's structural representation.

Fig. 9 is the schematic diagram that adds the embodiment of bearing in the present invention at piston rod outward.

Embodiment

Below in conjunction with the drawings and specific embodiments, the invention will be further described, can be implemented, but illustrated embodiment is not as a limitation of the invention so that those skilled in the art can better understand the present invention also.

In the present invention, the magnetic loss causing in order to reduce piston, the projection of piston 9 at least one plane at piston axes place and the inner stator 1 of motor are made up of non-magnetic or non-magnetic non-conducting material at least a portion of the overlapping part of the projection in this plane.Wherein non-magnet material can be epoxy resin glass, PPS(polyphenylene sulfide), PEEK(polyethers ether copper) plastics or aluminum alloy; Non-magnetic non-conducting material can be epoxy resin glass, PPS or PEEK plastics.Piston 9 can be one-body molded with mover support 52, also after moulding, connects together respectively.Piston 9 described in the present invention, refers to all parts that extend to cylinder 12 directions at automatic submounts 52 places.It can be an overall structure with mover, can be to be also connected with piston rod 91 by piston head 92 and the compostle member that forms.Piston rod can be that independent parts can be also parts (respectively as Fig. 5, shown in Fig. 8) for mover.Embodiment as shown in Figure 2.In this embodiment, piston 9 connects together after moulding respectively with mover support 52, and the projection of piston 9 at least one plane at piston axes place and the inner stator 1 of motor are made up of non-magnetic or non-magnetic non-conducting material in the overlapping part of the projection in this plane, other parts can be made up of metallic material, between two-part, can connect by the various ways such as bonding, to weld, be spirally connected, as long as can ensure that two-part are solid and reliable.Wherein, the part that the projection in the axial direction of the inner stator 1 of the projection in the axial direction of above-mentioned piston 9 and motor is overlapping, comprises in the course of the work dynamically lap.Due to the part magnetic field outside inner stator 1 a little less than, although thereby a part for piston 9 be to be made by metallic material, because this part is positioned at outside inner stator 1, the magnetic loss therefore causing is very little.The advantage of this structure is, when need to be in the time that the outer wall of piston 9 adds the strong point (adding bearing away from one end outer wall of cylinder at piston), because relative movement between the piston rod part of piston 9 and bearing produces friction, adopt metallic material to make this part piston and can improve its wear resistance.

Embodiment as shown in Figure 3, in this embodiment, piston 9 connects together after moulding respectively with mover support 52, and whole piston 9 is all made up of non-magnetic or non-magnetic non-conducting material.This embodiment is because whole piston is made by non-magnetic or non-magnetic non-conducting material, and the magnetic loss therefore causing is less.Especially in the time adopting non-magnetic non-conducting material, the magnetic loss causing is zero substantially.Can make the efficiency of compressor higher.But, because the wear resistance of non-magnetic or non-magnetic non-conducting material is relatively poor, and between piston and cylinder, have the reciprocating friction of high speed.Therefore in order to improve the life-span of piston, can adopt the embodiment shown in Fig. 4 and Fig. 5.

In the embodiment shown in fig. 4, the coated sleeve 9a being made by high-abrasive material of one end outer wall on compression direction at piston 9.This sleeve 9a can fix by bonding, welding, screw, screw-nut is fixed or the mode such as interference fit is fixed to piston 9 and is positioned at one end outer wall of cylinder 12, also can form by one end outer wall spraying abrasion-proof coating in piston compression direction.So, the sleeve 9a being made up of high-abrasive material contacts with cylinder 12, and piston 9 itself not with cylinder 12 contact frictions, in the working life that therefore can greatly improve piston 9, also extended the bulk life time of compressor.

In addition, also can be as shown in Figure 5, piston 9 comprises piston rod 91 and is connected to the piston head 92 of piston rod 91 one end, between piston head 92 and piston rod 91, is connected by the mode that bonding, welding, screw are fixed or screw-nut is fixing.Wherein, piston rod 91 is made up of non-magnetic or non-magnetic non-conducting material; Piston head 92 is made up of high-abrasive material.So, with cylinder 12 contact frictions be the piston head 92 of being made by high-abrasive material, and the piston rod 91 of being made up of non-magnetic or non-magnetic non-conducting material does not contact with cylinder 12 substantially, therefore can not wear and tear, can improve equally the working life of piston, extend the bulk life time of compressor.

As Fig. 6, Fig. 7 and embodiment illustrated in fig. 8, its respectively to Fig. 3, Fig. 4 with embodiment illustrated in fig. 5 similar, difference is that piston 9 and mover support 52 are integrated.

In some cases, for example cylinder 12 more in short-term, or the diameter of piston rod 91 is while being less than piston head 92, because the chock plug 92 of taking over a job is less with the surface of contact of cylinder 12, is difficult to ensure the alignment in piston movement.Swing if skew occurs piston in movement process, can increase frictional force, when serious, can produce card cylinder phenomenon and even damage compressor.Therefore can be as shown in Figure 9, the sheathed bearing 3 of outer wall at piston rod 91 away from one end of cylinder 12, bearing 3 can be fixed on inner stator 1 or on other fixed component.Between piston rod 91 and bearing 3, be provided with wear-resisting cylinder 4, this wear-resisting cylinder 4 be fixed on piston rod 91 and can with bearing 3 relative movement.By bearing 3, piston rod 91 is supported, add the support of upper cylinder 12 to piston head 92, formed two strong points, thereby the coaxial stabilization while having ensured piston movement is avoided the generation of card cylinder phenomenon.

Certainly, the in the situation that of long cylinder, in order to improve the stability of coaxality and compressor operating, also can be on piston away from the sheathed bearing of outer wall of one end of cylinder, and wear-resisting cylinder is set between piston and bearing, this wear-resisting cylinder be fixed on piston and can with bearing relative movement.

The above embodiment is only the preferred embodiment for absolutely proving that the present invention lifts, and protection scope of the present invention is not limited to this.What those skilled in the art did on basis of the present invention is equal to alternative or conversion, all within protection scope of the present invention.Protection scope of the present invention is as the criterion with claims.

Claims (10)

1. the piston of a linear compressor, it is characterized in that, at least a portion of the overlapping part of the projection of the inner stator of the projection of described piston at least one plane at piston axes place and motor in this plane is made up of non-magnetic or non-magnetic non-conducting material.
2. the piston of linear compressor according to claim 1, is characterized in that, described piston and mover are one-body molded.
3. the piston of linear compressor according to claim 1, is characterized in that, described piston connects together after moulding respectively with mover.
4. the piston of linear compressor according to claim 1, is characterized in that, one end outer wall of described piston on compression direction is coated with the sleeve of being made up of high-abrasive material.
5. the piston of linear compressor according to claim 4, is characterized in that, described sleeve by bonding, welding, screw fix, screw-nut fixes or the mode of interference fit is fixed to one end outer wall of described piston on compression direction; Or form by one end outer wall spraying abrasion-proof coating in piston compression direction.
6. the piston of linear compressor according to claim 1, is characterized in that, described piston comprises piston rod and the piston head that is connected to piston rod one end, and wherein, described piston rod is made up of non-magnetic or non-magnetic non-conducting material; Described piston head is made up of high-abrasive material.
7. the piston of linear compressor according to claim 6, is characterized in that, between described piston head and piston rod, is connected by the mode that bonding, welding, screw are fixed or screw-nut is fixing.
8. the piston of linear compressor according to claim 1, is characterized in that, wherein said non-magnet material is epoxy resin glass, PPS, PEEK plastics or aluminum alloy; Described non-magnetic non-conducting material is epoxy resin glass, PPS or PEEK plastics.
9. according to the piston of the linear compressor described in claim 4 or 6, it is characterized in that, outer wall away from one end of cylinder on described piston or piston rod is arranged with bearing, between described piston or piston rod and described bearing, be provided with wear-resisting cylinder, this wear-resisting cylinder be fixed on described piston or piston rod and can with described bearing relative movement.
10. one kind includes in claim 1 ~ 9 linear compressor of piston described in any one.
CN201310408457.1A 2012-12-03 2013-09-10 Piston of linear compressor and linear compressor CN103850919A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN201210509174.1 2012-12-03
CN201210509174 2012-12-03
CN201310408457.1A CN103850919A (en) 2012-12-03 2013-09-10 Piston of linear compressor and linear compressor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201310408457.1A CN103850919A (en) 2012-12-03 2013-09-10 Piston of linear compressor and linear compressor

Publications (1)

Publication Number Publication Date
CN103850919A true CN103850919A (en) 2014-06-11

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CN201310408457.1A CN103850919A (en) 2012-12-03 2013-09-10 Piston of linear compressor and linear compressor

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107288841A (en) * 2016-03-30 2017-10-24 青岛海尔智能技术研发有限公司 Linear compressor and its assemble method

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020057973A1 (en) * 2000-11-10 2002-05-16 Choi Kyung-Shik Piston operating assembly for a linear compressor and method for manufacturing the same
JP2003049775A (en) * 2001-08-08 2003-02-21 Daikin Ind Ltd Compressor
CN1637288A (en) * 2003-12-29 2005-07-13 Lg电子株式会社 Apparatus for preventing abrasion in reciprocal compressor
JP2005220804A (en) * 2004-02-05 2005-08-18 Matsushita Electric Ind Co Ltd Linear compressor
KR20060091653A (en) * 2005-02-16 2006-08-21 엘지전자 주식회사 Piston for linear compressor
CN101205880A (en) * 2006-12-20 2008-06-25 泰州乐金电子冷机有限公司 Linear compressor

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020057973A1 (en) * 2000-11-10 2002-05-16 Choi Kyung-Shik Piston operating assembly for a linear compressor and method for manufacturing the same
JP2003049775A (en) * 2001-08-08 2003-02-21 Daikin Ind Ltd Compressor
CN1637288A (en) * 2003-12-29 2005-07-13 Lg电子株式会社 Apparatus for preventing abrasion in reciprocal compressor
JP2005220804A (en) * 2004-02-05 2005-08-18 Matsushita Electric Ind Co Ltd Linear compressor
KR20060091653A (en) * 2005-02-16 2006-08-21 엘지전자 주식회사 Piston for linear compressor
CN101205880A (en) * 2006-12-20 2008-06-25 泰州乐金电子冷机有限公司 Linear compressor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107288841A (en) * 2016-03-30 2017-10-24 青岛海尔智能技术研发有限公司 Linear compressor and its assemble method

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Address after: 266101 Haier Road, Laoshan District, Shandong, Qingdao, No. 1

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Application publication date: 20140611

Assignee: WanBao Group Compressor Co., Ltd.

Assignor: Intellectual technology research and development Co., Ltd of Qingdao Haier

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Denomination of invention: Piston of linear compressor and linear compressor

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Assignee: Jiaxibeila Compressor Co., Ltd.

Assignor: Intellectual technology research and development Co., Ltd of Qingdao Haier

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Denomination of invention: Piston of linear compressor and linear compressor

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