KR20010109542A - Structure for reducing windage loss of linear compressor - Google Patents

Structure for reducing windage loss of linear compressor Download PDF

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Publication number
KR20010109542A
KR20010109542A KR1020000029043A KR20000029043A KR20010109542A KR 20010109542 A KR20010109542 A KR 20010109542A KR 1020000029043 A KR1020000029043 A KR 1020000029043A KR 20000029043 A KR20000029043 A KR 20000029043A KR 20010109542 A KR20010109542 A KR 20010109542A
Authority
KR
South Korea
Prior art keywords
piston
refrigerant gas
linear
gas
casing
Prior art date
Application number
KR1020000029043A
Other languages
Korean (ko)
Other versions
KR100339596B1 (en
Inventor
오원식
박정식
Original Assignee
구자홍
엘지전자주식회사
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.)
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Publication date
Application filed by 구자홍, 엘지전자주식회사 filed Critical 구자홍
Priority to KR1020000029043A priority Critical patent/KR100339596B1/en
Priority claimed from KR1020000029043A external-priority patent/KR100339596B1/en
Priority claimed from US09/693,857 external-priority patent/US6491506B1/en
Publication of KR20010109542A publication Critical patent/KR20010109542A/en
Application granted granted Critical
Publication of KR100339596B1 publication Critical patent/KR100339596B1/en

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B17/00Pumps characterised by combination with, or adaptation to, specific driving engines or motors
    • F04B17/03Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors
    • F04B17/04Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors using solenoids

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wind loss reduction structure of a linear compressor. The present invention relates to a linear motor that is filled with refrigerant gas in a casing provided with a suction pipe and a discharge pipe, and generates a driving force in the casing. A piston which is coupled to the motor and linearly reciprocates and sucks and compresses refrigerant gas in the casing is slidably inserted into the linear cylinder, and forms at least one gas through hole at the connection portion where the linear motor and the piston are coupled to each other. When the mover and the piston reciprocate, the refrigerant gas filled in the space on both sides of the connecting portion is circulated with each other, and the refrigerant gas in the space on both sides of the connecting portion moves to the opposite side to reduce the flow resistance by reducing the flow loss. .
In addition, since the piston is radiated by the convective heat transfer generated by the refrigerant gas circulated through the gas through-hole, the specific volume of the suction refrigerant is reduced, thereby improving motor efficiency.

Description

Wind loss reduction structure of linear compressor {STRUCTURE FOR REDUCING WINDAGE LOSS OF LINEAR COMPRESSOR}

The present invention relates to a wind loss reduction structure of a linear compressor, and more particularly, to a wind loss reduction structure of a linear compressor for minimizing flow path resistance generated during reciprocating movement of a piston to improve motor efficiency.

In general, the linear compressor is coupled to the magnet assembly forming the mover of the linear motor in place of the crankshaft so that the piston is integrally fixed to the magnet assembly. FIG.

As shown in the drawing, a conventional linear compressor has a compression unit (C) installed in a transverse direction inside a casing (V) filled with oil on a bottom surface thereof to suck, compress, and discharge refrigerant, and the compression unit (C). It is fixed to the outside of the oil feeder is configured to supply oil to the sliding portion (O).

The compression unit (C) includes an annular frame (1), a cover (2) fixedly installed on one side of the frame (1), and a cylinder (3) fixed laterally in the center of the frame (1). An inner stator assembly 4A fixed to the outer circumferential surface of the frame 1 supporting the cylinder 3 and an outer stator assembly 4B fixed with a predetermined gap on the outer circumferential surface of the inner stator assembly 4A; The magnet assembly 5 interposed between the inner and outer stator assemblies 4A and 4B, which constitutes the mover of the linear motor, and is integrally fixed to the magnet assembly 5 so as to slide in the cylinder 3. The inner and outer resonant springs 7A and 7B which guide the piston 6 to suction and compress the refrigerant gas and the magnet assembly 5 to continuously resonate in the air gap between the inner and outer stator assemblies 4A and 4B. And pieces attached to the tip of the cylinder 3 Is made by a discharge valve assembly (8) for restricting discharge of the compressed gas during the reciprocating motion of (6).

The piston 6 has a head portion 6b formed on the front side of the body portion 6a having a predetermined length, and a connecting portion 6c connected to the magnet assembly 5 on the rear side of the body portion 6a. ) Is formed in a disk-shaped flange shape, and a gas flow path F for guiding the refrigerant gas to the cylinder is formed in the center of the trunk portion 6a.

In the drawings, reference numeral 9 denotes a suction valve, and SP denotes a suction pipe.

The linear compressor as described above is operated as follows.

That is, when a current is applied to the inner and outer stator assemblies 4A and 4B so that the magnet assembly 5 linearly reciprocates, the piston 6 coupled thereto reciprocates linearly inside the cylinder 3. The pressure difference is generated in the cylinder (3), and the refrigerant gas in the casing (V) is sucked into the cylinder (3) through the gas flow path (F) of the piston (6) by the pressure difference in the cylinder (3). The process of compression ejection is repeated.

At this time, a part of the refrigerant gas sucked through the suction pipe (SP) during the suction process of the piston (6) is introduced into the cover (2) during the reciprocating movement of the piston (6) and then part of the air gap of the linear motor It was introduced into the inside of the magnet assembly 5 through and eventually distributed evenly throughout the casing (V).

However, in the conventional linear compressor as described above, the refrigerant gas is filled inside the cover 2 and inside the magnet assembly 5 disposed inside and outside the connecting portion 6c of the piston 6, whereas the above-mentioned piston ( Since the connection part 6c of 6) is formed in the direction of the clogged disc as described above, there is a problem in that the flow resistance is generated during the reciprocating movement of the piston 6, thereby lowering the efficiency of the motor.

The present invention has been made in view of the above problems of the conventional linear compressor, and an object of the present invention is to provide a wind loss reduction structure of the linear compressor which can minimize the flow resistance generated during the reciprocating motion of the piston.

1 is a longitudinal sectional view showing an example of a conventional linear compressor.

Figure 2 is a perspective view of the piston of the conventional linear compressor seen from the rear.

Figure 3 is a schematic view showing a longitudinal cross-sectional view of the flow path resistance imposed on the connecting portion of the piston during the reciprocating movement of the magnet assembly and the piston in a conventional linear compressor.

Figure 4 is a longitudinal sectional view showing an example of the linear compressor of the present invention.

5 is a perspective view of the piston of the present invention linear compressor viewed from the rear;

Figure 6 is a schematic view showing a longitudinal cross-sectional view of the flow path resistance imposed on the connecting portion of the piston during the reciprocating movement of the magnet assembly and the piston in the linear compressor of the present invention.

** Description of symbols for the main parts of the drawing **

1: frame 2: cover

3: cylinder 4A, 4B: inner and outer stator assembly

5: magnet assembly 7A, 7B: inner and outer resonant spring

100: piston 110: the body of the piston

120: head portion of the piston 130: connection portion of the piston

131: gas through hole V: casing

In order to achieve the object of the present invention, the refrigerant gas is filled in the casing provided with the suction pipe and the discharge pipe, the linear motor for generating a driving force in the casing is mounted, coupled to the linear motor to reciprocate linearly The piston which sucks and compresses the refrigerant gas in the casing while sliding is inserted in the linear cylinder.

At least one gas through-hole is formed in the connecting portion where the linear motor and the piston are coupled to each other so that the refrigerant gas filled in the spaces on both sides of the connecting portion is circulated during the reciprocating motion of the linear motor and the piston. A wind loss reduction structure of the linear compressor is provided.

Hereinafter, the wind loss reduction structure of the linear compressor according to the present invention will be described in detail based on the embodiment shown in the accompanying drawings.

Figure 4 is a longitudinal sectional view showing an example of the linear compressor of the present invention, Figure 5 is a perspective view of the piston of the linear compressor of the present invention seen from the rear.

As shown therein, the linear compressor having a windage reduction structure according to the present invention includes a casing V having a predetermined internal volume, filled with oil on a bottom thereof, and provided with a suction pipe SP and a discharge pipe (not shown). , An annular frame (1) elastically supported by the casing (V), a cover (2) fixed to the rear side of the frame (1), and a cylinder fixed transversely to the center of the frame ( 3) an inner stator assembly 4A fixed to the outer circumferential surface of the cylinder 3, an outer stator assembly 4B fixed with a predetermined gap on the outer circumferential surface of the inner stator assembly 4A, and the inner stator assembly The magnet assembly 5 interposed in the gap between 4A and the outer stator assembly 4B for linear reciprocating motion, and integrally fixed to the magnet assembly 5 and inserted in the cylinder 3 to be slidably inserted as described above. If the linear reciprocating motion with the magnet assembly (5) Piston 100 for sucking and compressing the fluid flowing into the casing (V) through the gas flow path (F) and guides the reciprocating motion of the magnet assembly (5) together with the piston (100) An inner resonant spring 7A and an outer resonant spring 7B which are elastically supported so as to be elastically supported, and a discharge valve assembly 8 mounted on the front end surface of the cylinder 3 to limit the discharge of refrigerant gas.

The piston 100 has a head portion 120 is formed on the front side of the body portion 110 having a predetermined length, the connecting portion 130 is connected to the magnet assembly 5 on the rear side of the body portion 110 ) Is formed in a disk-shaped flange shape, the gas flow path (F) for guiding the refrigerant gas to the cylinder (3) is formed in the center of the body portion (110).

The connection portion 130 is formed in the shape of a disk-like flange as described above, the gas cylinder hole 131 is formed on the same circumference or on the grid. The gas through hole 131 may be formed in an arc shape as in the present embodiment, or may be implemented in various ways such as a simple circle.

In the drawings, the same reference numerals are given to the same parts as in the prior art.

In the drawings, reference numeral 9 denotes a suction valve, and SP denotes a suction pipe.

The general operation of the linear compressor provided with the wind loss reduction structure of the present invention as described above is similar to the conventional.

That is, when a current is applied to the inner and outer stator assemblies 4A and 4B and the magnet assembly 5 performs a linear reciprocating motion, the piston 100 coupled thereto reciprocates the inside of the cylinder 3 in a linear manner. The pressure difference is generated in the cylinder (3), and the refrigerant gas in the casing (V) is sucked into the cylinder (3) through the gas flow path (F) of the piston 100 by the pressure difference in the cylinder (3). The process of compression ejection is repeated.

Here, during the reciprocating motion of the piston 100, the refrigerant gas flows into the inside of the cover 2, and a part of the refrigerant gas flows back through the space between the inner stator assembly 4A and 4B and the magnet assembly 5, and the like. Introduced into the inside of the magnet assembly 5 is eventually filled in the space on both sides of the connecting portion 130 of the piston (100). In this state, when the piston 100 reciprocates in a straight line, the refrigerant gas, which is filled in the space on both sides of the connection part 130 of the piston 100, is pressurized by the connection part 130 to generate flow resistance. However, since the gas through hole 131 is formed in the connecting portion 130 of the piston 100, the refrigerant gases in the spaces on both sides of the connecting portion 130 move opposite to each other, thereby reducing the flow resistance and improving the motor efficiency.

In addition, convective heat transfer is generated by the refrigerant gas circulated through the gas through hole 131, thereby dissipating the piston 100 to reduce the specific volume of the suction refrigerant, thereby improving motor efficiency.

The wind loss reduction structure of the linear compressor according to the present invention forms at least one gas through hole at a connection portion at which the linear motor and the piston are coupled, and is filled in the space at both sides of the connection portion at the reciprocating motion of the linear motor and the piston. By allowing the refrigerant gases to flow through each other, the refrigerant gas in the spaces on both sides of the connection portion move to the opposite sides, thereby reducing the flow resistance and reducing the windage loss.

In addition, since the piston is radiated by the convective heat transfer generated by the refrigerant gas circulated through the gas through-hole, the specific volume of the suction refrigerant is reduced, thereby improving motor efficiency.

Claims (1)

  1. A refrigerant gas is filled in the casing provided with the suction pipe and the discharge pipe, and a linear motor for generating a driving force is mounted inside the casing, and coupled to the linear motor, the refrigerant gas in the casing is sucked in a linear reciprocating motion. The piston is compressed into a linear cylinder,
    At least one gas through-hole is formed in the connecting portion where the linear motor and the piston are coupled to each other so that the refrigerant gas filled in the spaces on both sides of the connecting portion is circulated during the reciprocating motion of the linear motor and the piston. Wind loss reduction structure of linear compressor.
KR1020000029043A 2000-05-29 Structure for reducing windage loss of linear compressor KR100339596B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020000029043A KR100339596B1 (en) 2000-05-29 Structure for reducing windage loss of linear compressor

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
KR1020000029043A KR100339596B1 (en) 2000-05-29 Structure for reducing windage loss of linear compressor
US09/693,857 US6491506B1 (en) 2000-05-29 2000-10-23 Linear compressor
JP2000324217A JP3735029B2 (en) 2000-05-29 2000-10-24 Linear compressor
CN00130326A CN1097675C (en) 2000-05-29 2000-10-31 Linear compressor
DE2000155954 DE10055954B8 (en) 2000-05-29 2000-11-11 linear compressor
BR0005553A BR0005553A (en) 2000-05-29 2000-11-24 Linear compressor

Publications (2)

Publication Number Publication Date
KR20010109542A true KR20010109542A (en) 2001-12-12
KR100339596B1 KR100339596B1 (en) 2002-06-03

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20190031826A (en) * 2017-09-18 2019-03-27 엘지전자 주식회사 Linear compressor
KR20190032885A (en) * 2017-09-20 2019-03-28 엘지전자 주식회사 Linear compressor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20190031826A (en) * 2017-09-18 2019-03-27 엘지전자 주식회사 Linear compressor
KR20190032885A (en) * 2017-09-20 2019-03-28 엘지전자 주식회사 Linear compressor

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