KR20160001056A - A linear compressor and a refrigerator including the same - Google Patents

A linear compressor and a refrigerator including the same Download PDF

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Publication number
KR20160001056A
KR20160001056A KR1020140078763A KR20140078763A KR20160001056A KR 20160001056 A KR20160001056 A KR 20160001056A KR 1020140078763 A KR1020140078763 A KR 1020140078763A KR 20140078763 A KR20140078763 A KR 20140078763A KR 20160001056 A KR20160001056 A KR 20160001056A
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KR
South Korea
Prior art keywords
filter
cylinder
refrigerant
portion
muffler
Prior art date
Application number
KR1020140078763A
Other languages
Korean (ko)
Inventor
이경원
김동한
한영철
Original Assignee
엘지전자 주식회사
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Application filed by 엘지전자 주식회사 filed Critical 엘지전자 주식회사
Priority to KR1020140078763A priority Critical patent/KR20160001056A/en
Publication of KR20160001056A publication Critical patent/KR20160001056A/en

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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
    • F25B43/00Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
    • F25B43/003Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat filters
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B35/00Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for
    • F04B35/04Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for the means being electric
    • F04B35/045Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for the means being electric using solenoids
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B37/00Pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B25/00 - F04B35/00
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/0027Pulsation and noise damping means
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/0027Pulsation and noise damping means
    • F04B39/0033Pulsation and noise damping means with encapsulations
    • F04B39/0038Pulsation and noise damping means with encapsulations of inlet or outlet channels
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/0027Pulsation and noise damping means
    • F04B39/0088Pulsation and noise damping means using mechanical tuned resonators
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/02Lubrication
    • F04B39/0284Constructional details, e.g. reservoirs in the casing
    • F04B39/0292Lubrication of pistons or cylinders
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/04Measures to avoid lubricant contaminating the pumped fluid
    • F04B39/041Measures to avoid lubricant contaminating the pumped fluid sealing for a reciprocating rod
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/12Casings; Cylinders; Cylinder heads; Fluid connections
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/12Casings; Cylinders; Cylinder heads; Fluid connections
    • F04B39/122Cylinder block
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/16Filtration; Moisture separation
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/10Valves; Arrangement of valves
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/14Pistons, piston-rods or piston-rod connections
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04BPOSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/20Filtering
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT-PUMP SYSTEMS
    • F25B43/00Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
    • F25B43/02Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat for separating lubricants from the refrigerant

Abstract

The present invention relates to a linear compressor and a refrigerator including the same.
A linear compressor according to an embodiment of the present invention includes: a shell provided with a suction portion; A cylinder disposed inside the shell and forming a compression space for the refrigerant; A piston provided to be axially reciprocable within the cylinder; A discharge valve provided at one side of the cylinder for selectively discharging compressed refrigerant in a compression space of the refrigerant; A nozzle unit formed in the cylinder and introducing at least a part of the refrigerant discharged through the discharge valve into the cylinder; And a filter device installed inside the shell, wherein the filter device includes at least one filter member provided on a refrigerant flow path from the suction portion to the nozzle portion via the discharge valve, And the filter element is filtered while the foreign matter or oil in the refrigerant flowing into the nozzle part is filtered.

Description

Technical Field The present invention relates to a linear compressor and a refrigerator including the same,

The present invention relates to a linear compressor and a refrigerator including the same.

Generally, a compressor is a mechanical device that receives power from an electric motor such as an electric motor or a turbine and compresses air, refrigerant or various other operating gases to increase the pressure. The compressor is used for a household appliance such as a refrigerator and an air conditioner, It is widely used throughout.

Such a compressor is broadly classified into a reciprocating compressor that compresses the refrigerant while linearly reciprocating the piston inside the cylinder so as to form a compression space in which a working gas is sucked and discharged between the piston and the cylinder. A rotary compressor for compressing the refrigerant while the roller is eccentrically rotated along the inner wall of the cylinder and a compression space for sucking and discharging the working gas between the roller and the cylinder, a scroll compressor in which a compression space in which an operating gas is sucked and discharged is formed between a fixed scroll and a fixed scroll and the orbiting scroll rotates along the fixed scroll to compress the refrigerant.

In recent years, among the reciprocating compressors, there has been developed a linear compressor in which a piston is directly connected to a driving motor that reciprocates linearly, so that compression efficiency can be improved without mechanical loss due to motion switching and a simple structure is constructed.

Normally, the linear compressor is configured to suck and compress the refrigerant while discharging the refrigerant while moving the piston in the sealed shell by reciprocating linear motion within the cylinder by the linear motor.

The linear motor is configured such that a permanent magnet is positioned between an inner stator and an outer stator, and the permanent magnet is driven to linearly reciprocate by the mutual electromagnetic force between the permanent magnet and the inner (or outer) stator. As the permanent magnet is driven in the state of being connected to the piston, the piston linearly reciprocates in the cylinder, sucks the refrigerant, compresses the refrigerant, and discharges the refrigerant.

Regarding the conventional linear compressor, the present applicant has been registered by applying a patent application (hereinafter referred to as a prior art document).

[Prior Art]

1. Registration No. 10-1307688, Date of Registration: September 5, 2013 Title of invention: Linear compressor

The linear compressor according to the prior art document includes a shell 110 that accommodates a number of components. The height of the shell 110 in the up-and-down direction is somewhat higher, as shown in Fig. 2 of the prior art.

An oil supply assembly 900 capable of supplying oil to the space between the cylinder 200 and the piston 300 is provided in the shell 110.

On the other hand, when the linear compressor is provided in the refrigerator, the linear compressor may be installed in a machine room provided at the rear lower side of the refrigerator.

In recent years, increasing the internal storage space of refrigerators has become a major concern for consumers. In order to increase the internal storage space of the refrigerator, it is necessary to reduce the volume of the machine room, and reducing the size of the linear compressor to reduce the volume of the machine room becomes a major issue.

However, the linear compressor disclosed in the prior art has a relatively large volume, which is not suitable for a refrigerator for increasing internal storage space.

In order to reduce the size of the linear compressor, it is necessary to make the main parts of the compressor small, but in this case, the performance of the compressor may be degraded.

In order to compensate for the problem of the performance degradation of the compressor, it may be considered to increase the operating frequency of the compressor. However, as the operating frequency of the compressor increases, the frictional force due to the oil circulated in the compressor increases, thereby deteriorating the performance of the compressor.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a linear compressor in which a gas bearing easily operates between a cylinder and a piston, and a refrigerator including the same.

A linear compressor according to an embodiment of the present invention includes: a shell provided with a suction portion; A cylinder disposed inside the shell and forming a compression space for the refrigerant; A piston provided to be axially reciprocable within the cylinder; A discharge valve provided at one side of the cylinder for selectively discharging compressed refrigerant in a compression space of the refrigerant; A nozzle unit formed in the cylinder and introducing at least a part of the refrigerant discharged through the discharge valve into the cylinder; And a filter device installed inside the shell, wherein the filter device includes at least one filter member provided on a refrigerant flow path from the suction portion to the nozzle portion via the discharge valve, And the filter element is filtered while the foreign matter or oil in the refrigerant flowing into the nozzle part is filtered.

The suction device further includes a suction muffler provided inside the shell for reducing noise of the refrigerant sucked through the suction device, and the filter device includes a first filter provided in the suction muffler.

Further, the suction muffler includes a first muffler and a second muffler, and the first filter is installed at a joint portion between the first muffler and the second muffler.

A groove formed in one of the first muffler and the second muffler; And a projection formed on the other of the first muffler and the second muffler and coupled to the groove, wherein both side portions of the first filter are interposed between the groove and the projection.

The first filter may include a material having magnetism.

The first filter may be made of stainless steel.

Further, a frame fixed to the outside of the cylinder is further included, and the filter device includes a second filter installed in the refrigerant flow space between the cylinder and the frame.

The cylinder includes a cylinder body and a cylinder flange portion extending radially outward of the cylinder body. The frame includes a depression for inserting the cylinder flange portion and a seat portion on which one side of the cylinder flange portion is seated .

Further, the second filter is placed on the seat portion of the frame.

Further, the second filter is placed between the outer peripheral surface of the cylinder flange portion and the inner peripheral surface of the depressed portion.

Further, the second filter has a ring shape.

In addition, the second filter includes a nonwoven fabric made of PET (Polyethylene Terephthalate).

In addition, a gas inlet portion communicating with the nozzle portion is further included, the third filter being installed in the gas inlet portion.

In addition, the third filter includes a thread having a predetermined thickness or diameter.

The thread is made of PET (Polyethylene Terephthalate) material.

In addition, the thread is installed to be wound on the gas inflow part a plurality of times.

A refrigerator according to another aspect includes a linear compressor including a reciprocating piston and a cylinder having an outer circumferential surface for receiving the refrigerant and containing the piston; A filter device provided inside the linear compressor for filtering refrigerant flowing into an outer circumferential surface of the cylinder; A condenser for condensing the refrigerant compressed in the linear compressor; And a dryer for removing foreign matter or oil in the refrigerant condensed in the condenser, wherein the dryer is provided with an adsorbent for adsorbing the oil contained in the refrigerant.

Further, the adsorbent includes a molecular sieve having a granular shape and forming a plurality of holes for adsorbing oil.

Further, the adsorbent includes an oil absorbing film or a nonwoven fabric.

The dryer may further include: a first dryer filter provided inside the inlet side of the dryer; A second dryer filter supported by the first dryer filter, the second dryer filter including the adsorbent; And a third dryer filter that supports the second dryer filter and is provided inside the outlet side of the dryer.

In addition, the filter device includes a first filter provided in a suction muffler for reducing flow noise of a refrigerant sucked into the linear compressor.

In addition, the filter device includes a second filter provided at one side of the cylinder, for filtering at least a part of the refrigerant discharged from the cylinder.

In addition, the filter device includes a third filter arranged to be wound around the outer circumferential surface of the cylinder.

According to the present invention, it is possible to reduce the size of the machine room of the refrigerator by reducing the size of the compressor including the internal parts, thereby increasing the internal storage space of the refrigerator.

Also, by increasing the operating frequency of the compressor, it is possible to prevent performance deterioration due to the reduced internal parts, and by applying gas bearings between the cylinder and the piston, frictional force that can be generated by the oil can be reduced.

Further, by providing a plurality of filter devices inside the compressor, foreign matter or oil can be prevented from being contained in the compressed gas (or discharge gas) flowing from the nozzle of the cylinder to the outside of the piston.

Particularly, since the first filter is provided in the suction muffler, foreign matter contained in the refrigerant can be prevented from flowing into the compression chamber. By providing the second filter at the coupling portion between the cylinder and the frame, foreign matter or oil Can be prevented from flowing to the gas inlet portion of the cylinder.

A third filter may be provided in the gas inflow portion of the cylinder to prevent foreign matter or oil from flowing into the nozzle of the cylinder from the gas inflow portion.

Further, by providing the filter device in the dryer provided in the refrigerator, it is possible to filter not only moisture or foreign matter contained in the refrigerant, but also oil.

As described above, since foreign matter or oil contained in the compressed gas acting as a bearing can be filtered through the plurality of filter devices provided in the compressor and the dryer, it is possible to prevent the nozzle portion of the cylinder from clogging due to foreign matter or oil have.

By preventing the clogging of the nozzle of the cylinder, the action of the gas bearing can be effectively performed between the cylinder and the piston, thereby preventing the wear of the cylinder and the piston.

1 is a cross-sectional view illustrating a configuration of a refrigerator according to an embodiment of the present invention.
2 is a cross-sectional view illustrating the structure of a dryer of a refrigerator according to an embodiment of the present invention.
3 is a cross-sectional view showing a configuration of a linear compressor according to an embodiment of the present invention.
4 is a cross-sectional view showing the structure of a suction muffler according to an embodiment of the present invention.
5 is a view showing a state where the first filter is coupled to the suction muffler according to the embodiment of the present invention.
6 is a cross-sectional view illustrating a state in which a second filter according to an embodiment of the present invention is disposed.
7 is an exploded perspective view showing a structure of a cylinder and a frame according to an embodiment of the present invention.
8 is an exploded perspective view of a frame according to an embodiment of the present invention.
FIG. 9 is a cross-sectional view showing a combination of a cylinder and a piston according to an embodiment of the present invention.
10 is a view showing a configuration of a cylinder according to an embodiment of the present invention.
11 is an enlarged cross-sectional view of "A"
12 is a cross-sectional view illustrating a refrigerant flow of a linear compressor according to an embodiment of the present invention.
13 is a cross-sectional view showing a state in which a second filter according to another embodiment of the present invention is disposed.

Hereinafter, specific embodiments of the present invention will be described with reference to the drawings. It is to be understood, however, that the spirit of the invention is not limited to the embodiments shown and that those skilled in the art, upon reading and understanding the spirit of the invention, may easily suggest other embodiments within the scope of the same concept.

1 is a cross-sectional view illustrating a configuration of a refrigerator according to an embodiment of the present invention.

Referring to FIG. 1, a refrigerator 10 according to an embodiment of the present invention includes a plurality of devices for driving a refrigeration cycle.

In detail, the refrigerator 10 includes a compressor 100 for compressing the refrigerant, a condenser 20 for condensing the refrigerant compressed in the compressor 100, and a condenser 20 for condensing the moisture, An evaporator 40 for evaporating the refrigerant decompressed in the expansion device 30, and an evaporator 40 for evaporating the refrigerant decompressed in the expansion device 30, .

The refrigerator 10 further includes a condensing fan 25 for blowing air toward the condenser 20 and an evaporation fan 45 for blowing air toward the evaporator 40.

The compressor 100 includes a linear compressor that is connected directly to the motor to compress the refrigerant while linearly reciprocating within the cylinder. The expansion device 30 includes a capillary tube having a relatively small diameter.

The liquid refrigerant condensed in the condenser (20) may be introduced into the dryer (200). Of course, the liquid refrigerant may include some gaseous refrigerant. The dryer (200) may be provided with a filter device for filtering the introduced liquid refrigerant. Hereinafter, the structure of the dryer 200 will be described with reference to the drawings.

2 is a cross-sectional view illustrating the structure of a dryer of a refrigerator according to an embodiment of the present invention.

Referring to FIG. 2, a dryer 200 according to an embodiment of the present invention includes a dryer body 210 that forms a space for a coolant to flow, a cooler 210 that is provided at one side of the dryer body 210, A refrigerant inlet portion 211 and a refrigerant outlet portion 215 provided on the other side of the dryer body 210 to guide the discharge of the refrigerant.

For example, the dryer body 210 may have a long cylindrical shape.

In the interior of the dryer body 210, dryer filters 220, 230, and 240 are installed.

In detail, the dryer filters 220, 230 and 240 include a first dryer filter 220 provided inside the refrigerant inlet 211 and a second dryer filter 220 separated from the first dryer filter 220, A third dryer filter 240 provided inside the first dryer filter 220 and a second dryer filter 230 provided between the first dryer filter 220 and the third dryer filter 240 are installed.

The first dryer filter 220 is disposed adjacent to the inside of the refrigerant inlet 211, that is, closer to the refrigerant inlet 211 than the refrigerant outlet 215.

The first dryer filter 220 has an approximately hemispherical shape and an outer peripheral surface of the first dryer filter 220 may be coupled to an inner peripheral surface of the dryer body 210. The first dryer filter 220 is provided with a plurality of through holes 221 for guiding the flow of the refrigerant. The bulky foreign object may be filtered by the first dryer filter 220.

The second dryer filter 230 includes a plurality of adsorbents 231. The adsorbent 231 is understood to be a molecular sieve as a granule of a predetermined size, and the predetermined size is about 5 to 10 mm.

A number of holes are formed in the adsorbent 231 and the holes are formed in a size similar to the size of the oil (about 10 Å), and the size of the water (about 2.8 to 3.2 Å) and the size of the refrigerant 4.0 A for R600a, and 4.3 A for R600a).

Here, the term "oil component" is understood as a processing oil or cutting oil to be inputted when manufacturing or processing the structure of the refrigeration cycle.

The refrigerant and moisture passing through the first dryer filter 220 can easily flow into the plurality of holes through the adsorbent 231, but are easily discharged. Therefore, the refrigerant and moisture are not easily adsorbed to the adsorbent 231.

However, when the oil flows once into the plurality of holes, it can not be easily discharged, so that the oil adsorbed by the adsorbent 231 is maintained.

For example, the adsorbent 231 includes a BASF 13X molecular sieve. The size of the hole formed in the BASF 13X molecular sieve is about 10 Å (1 nm), and the formula is formed of Na 2 O 揃 Al 2 O 3 揃 mSiO 2 揃 nH 20 (m ≦ 2.35).

The oil contained in the refrigerant can be adsorbed to the plurality of adsorbents 231 while passing through the second dryer filter 230.

Other embodiments are suggested.

The second dryer filter 230 may be provided with an adsorbent in the form of an oil-absorbing or non-woven fabric capable of adsorbing oil, instead of a plurality of granular adsorbents.

The third dryer filter 240 includes an engaging portion 241 coupled to the inner circumferential surface of the dryer body 210 and a mesh portion 242 extending from the engaging portion 241 toward the refrigerant discharging portion 215. . The third dryer filter 240 may be referred to as a mesh filter.

By the mesh portion 242, fine particles contained in the refrigerant can be filtered.

The first dryer filter 220 and the third dryer filter 240 serve as a supporter for allowing the plurality of adsorbents 231 to be positioned inside the dryer body 210. That is, the plurality of adsorbents 231 are restricted from being discharged from the dryer 200 by the first and third dryer filters 220 and 240.

Thus, by providing the filter in the dryer 200, it is possible to remove foreign matter or oil contained in the refrigerant, thereby improving the reliability of the refrigerant serving as the gas bearing.

3 is a cross-sectional view showing a configuration of a linear compressor according to an embodiment of the present invention.

Referring to FIG. 3, the linear compressor 100 according to the embodiment of the present invention includes a substantially cylindrical shell 101, a first cover 102 coupled to one side of the shell 101, And a second cover 103 is provided. The first cover 102 is disposed on the right side of the shell 101 and the second cover 103 is disposed on the left side of the shell 101. [ Can be combined.

In a broad sense, the first cover 102 and the second cover 103 can be understood as a constitution of the shell 101. [

The linear compressor 100 is provided with a cylinder 120 provided inside the shell 101, a piston 130 linearly reciprocating in the cylinder 120, and a driving force applied to the piston 130 A motor assembly 140 is included as a linear motor.

When the motor assembly 140 is driven, the piston 130 can reciprocate at a high speed. The operating frequency of the linear compressor 100 according to the present embodiment is approximately 100 Hz.

In more detail, the linear compressor 100 includes a suction unit 104 through which refrigerant flows and a discharge unit 105 through which refrigerant compressed in the cylinder 120 is discharged. The suction unit 104 may be coupled to the first cover 102 and the discharge unit 105 may be coupled to the second cover 103.

The refrigerant sucked through the suction portion 104 flows into the piston 130 through the suction muffler 150. In the course of the refrigerant passing through the suction muffler 150, the noise can be reduced. The suction muffler 150 is constructed by combining a first muffler 151 and a second muffler 153. At least a portion of the suction muffler 150 is located within the piston 130.

The piston 130 includes a substantially cylindrical piston body 131 and a piston flange portion 132 extending radially from the piston body 131. The piston body 131 reciprocates within the cylinder 120 and the piston flange 132 can reciprocate outside the cylinder 120.

The piston 130 may be made of an aluminum material (aluminum or aluminum alloy) which is a non-magnetic material. The piston 130 is made of an aluminum material to prevent the magnetic flux generated in the motor assembly 140 from being transmitted to the piston 130 and leaking to the outside of the piston 130. The piston 130 may be formed by a forging method.

Meanwhile, the cylinder 120 may be made of an aluminum material (aluminum or aluminum alloy) which is a nonmagnetic material. The material composition ratio of the cylinder 120 and the piston 130, that is, kind and composition ratio, may be the same.

Since the cylinder 120 is made of an aluminum material, the magnetic flux generated in the motor assembly 200 can be prevented from being transmitted to the cylinder 120 and leaking to the outside of the cylinder 120. The cylinder 120 may be formed by an extrusion rod processing method.

The piston 130 and the cylinder 120 are made of the same material (aluminum), so that the coefficients of thermal expansion are equal to each other. Since the piston 130 and the cylinder 120 have the same thermal expansion coefficient during the operation of the linear compressor 100 and the inside of the shell 100 has a high temperature (about 100 ° C) And the cylinder 120 can be thermally deformed by the same amount.

As a result, since the piston 130 and the cylinder 120 are thermally deformed in different sizes or directions, interference between the piston 130 and the cylinder 120 can be prevented.

The cylinder (120) is configured to receive at least a portion of the suction muffler (150) and at least a portion of the piston (130).

A compression space P in which the refrigerant is compressed by the piston 130 is formed in the cylinder 120. A suction hole 133 for introducing a refrigerant into the compression space P is formed in a front portion of the piston 130. The suction hole 133 is selectively provided in front of the suction hole 133, A suction valve 135 is provided. At a substantially central portion of the suction valve 135, a fastening hole to which a predetermined fastening member is coupled is formed.

A discharge cover 160 for forming a discharge space or a discharge path for the refrigerant discharged from the compression space P and a discharge cover 160 coupled to the discharge cover 160 and disposed in front of the compression space P, A discharge valve assembly (161, 162, 163) for selectively discharging compressed refrigerant is provided.

The discharge valve assembly 161 is provided with a discharge valve 161 that opens when the pressure in the compression space P becomes equal to or higher than the discharge pressure and causes the refrigerant to flow into the discharge space of the discharge cover 160, A valve spring 162 provided between the discharge cover 161 and the discharge cover 160 for applying an elastic force in the axial direction and a stopper 163 for limiting the amount of deformation of the valve spring 162. Here, the compression space P is understood as a space formed between the suction valve 135 and the discharge valve 161.

The "axial direction" can be understood as a direction in which the piston 130 reciprocates, that is, a lateral direction in FIG. In the "axial direction", the direction from the suction portion 104 toward the discharge portion 105, that is, the direction in which the refrigerant flows is referred to as "forward" and the opposite direction is defined as "rearward".

On the other hand, the term "radial direction" can be understood as a direction perpendicular to the direction in which the piston 130 reciprocates and in the longitudinal direction of Fig.

The stopper 163 may be seated in the discharge cover 160 and the valve spring 162 may be seated in the rear of the stopper 163. The discharge valve 161 is coupled to the valve spring 162 and the rear or rear surface of the discharge valve 161 is positioned to be supported on the front surface of the cylinder 120.

The valve spring 162 may include a plate spring, for example.

The suction valve 135 is formed on one side of the compression space P and the discharge valve 161 may be provided on the other side of the compression space P, that is, on the opposite side of the suction valve 135.

When the pressure in the compression space P is lower than the discharge pressure and the suction pressure is lower than the suction pressure in the reciprocating linear motion of the piston 130 in the cylinder 120, the suction valve 135 is opened, Is sucked into the compression space (P). On the other hand, when the pressure in the compression space P becomes equal to or higher than the suction pressure, the refrigerant in the compression space P is compressed while the suction valve 135 is closed.

On the other hand, when the pressure in the compression space P becomes equal to or higher than the discharge pressure, the valve spring 162 is deformed to open the discharge valve 161. The refrigerant is discharged from the compression space P, And is discharged into the discharge space of the cover 160.

The refrigerant flowing in the discharge space of the discharge cover 160 flows into the loop pipe 165. The loop pipe 165 is coupled to the discharge cover 160 and extends to the discharge part 105 to guide the compressed refrigerant in the discharge space to the discharge part 105. For example, the loop pipe 178 has a round shape extending in a predetermined direction, and is coupled to the discharge unit 105.

The linear compressor (100) further includes a frame (110). The frame 110 is configured to fix the cylinder 120 and may be fastened to the cylinder 200 by a separate fastening member. The frame 110 is disposed to surround the cylinder 120. That is, the cylinder 120 may be positioned to be received inside the frame 110. The discharge cover 172 may be coupled to the front surface of the frame 110.

On the other hand, at least a portion of the gaseous refrigerant in the high-pressure gas refrigerant discharged through the opened discharge valve 161 flows through the space of the portion where the cylinder 120 and the frame 110 are coupled to the outer peripheral surface side of the cylinder 120 Can flow.

The refrigerant flows into the cylinder 120 through the gas inlet 122 (see FIG. 7) formed in the cylinder 120 and the nozzle 123 (see FIG. 11). The introduced refrigerant flows into the space between the piston 130 and the cylinder 120 so that the outer circumferential surface of the piston 130 is separated from the inner circumferential surface of the cylinder 120. Accordingly, the introduced refrigerant can function as a "gas bearing " which reduces friction with the cylinder 120 during reciprocation of the piston 130. [

The motor assembly 140 includes outer stator 141, 143 or 145 fixed to the frame 110 and arranged to surround the cylinder 120, an inner stator 148 (not shown) And permanent magnets 146 positioned in the space between the outer stator 141, 143, 145 and the inner stator 148.

The permanent magnets 146 can reciprocate linearly by mutual electromagnetic forces between the outer stator 141, 143, 145 and the inner stator 148. The permanent magnets 146 may be formed of a single magnet having one pole or a plurality of magnets having three poles.

The permanent magnet 146 may be coupled to the piston 130 by a connecting member 138. In detail, the connecting member 138 may be coupled to the piston flange portion 132 and may be bent and extended toward the permanent magnet 146. As the permanent magnet 146 reciprocates, the piston 130 can reciprocate axially together with the permanent magnet 146.

The motor assembly 140 further includes a fixing member 147 for fixing the permanent magnet 146 to the connecting member 138. The fixing member 147 may be formed by mixing glass fiber or carbon fiber with resin. The fixing member 147 is provided so as to surround the inside and the outside of the permanent magnet 146 to firmly maintain the state of engagement between the permanent magnet 146 and the connecting member 138.

The outer stator 141, 143, 145 includes the coil winding bodies 143, 145 and the stator core 141.

The coil winding bodies 143 and 145 include a bobbin 143 and a coil 145 wound around the bobbin 143 in the circumferential direction. The end face of the coil 145 may have a polygonal shape, and may have a hexagonal shape, for example.

The stator core 141 is formed by stacking a plurality of laminations in a circumferential direction, and may be arranged to surround the coil winding bodies 143 and 145.

A stator cover 149 is provided at one side of the outer stator 141, 143, 145. One side of the outer stator 141, 143, 145 may be supported by the frame 110 and the other side may be supported by the stator cover 149.

The inner stator 148 is fixed to the outer periphery of the frame 110. The inner stator 148 is formed by laminating a plurality of laminations in the circumferential direction from the outside of the cylinder 120.

The linear compressor 100 further includes a supporter 137 for supporting the piston 130 and a back cover 170 spring-coupled to the supporter 137.

The supporter 137 is coupled to the piston flange portion 132 and the connecting member 138 by a predetermined fastening member.

A suction guide portion 155 is coupled to the front of the back cover 170. The suction guide part 155 guides the refrigerant sucked through the suction part 104 to the suction muffler 150.

The linear compressor 100 includes a plurality of springs 176 whose natural frequencies are adjusted so that the piston 130 can resonate.

The plurality of springs 176 include a first spring supported between the supporter 137 and the stator cover 149 and a second spring supported between the supporter 137 and the back cover 170 do.

The linear compressor 100 further includes leaf springs 172 and 174 which are provided on both sides of the shell 101 to allow the internal parts of the compressor 100 to be supported by the shell 101.

The leaf springs 172 and 174 include a first leaf spring 172 coupled to the first cover 102 and a second leaf spring 174 coupled to the second cover 103. For example, the first leaf spring 172 can be fitted to a portion where the shell 101 and the first cover 102 are coupled, and the second leaf spring 174 can be engaged with the shell 101, 2 cover 103 is engaged.

FIG. 4 is a cross-sectional view showing a configuration of a suction muffler according to an embodiment of the present invention, and FIG. 5 is a view showing a state where a first filter is coupled to a suction muffler according to an embodiment of the present invention.

4 and 5, the suction muffler 150 according to the embodiment of the present invention includes a first muffler 151, a second muffler 153 coupled to the first muffler 151, A first filter 310 supported by a muffler 151 and a second muffler 153 are included.

The first muffler 151 and the second muffler 153 are formed with a flow space portion in which the refrigerant flows. The first muffler 151 extends from the inside of the suction portion 104 toward the discharge portion 105 and at least a part of the first muffler 151 is connected to the inside of the suction guide portion 155 . The second muffler 153 extends from the first muffler 151 to the interior of the piston body 131.

The first filter 310 is installed in the flow space portion and is understood as a configuration for filtering foreign matters. The first filter 310 is made of a material having magnetism, so that foreign matters, particularly metal dirt, contained in the refrigerant can be easily filtered.

For example, the first filter 310 may be made of stainless steel, and may have a predetermined magnetic property and may develop a rust phenomenon.

As another example, the first filter 310 may be coated with a magnetic material or may be configured to have a magnet attached to the surface of the first filter 310.

The first filter 310 may be a mesh type having a plurality of filter holes, and may have a substantially disc shape. The filter hole may have a diameter or a width of a predetermined size or less. For example, the predetermined size may be about 25 [mu] m.

The first muffler 151 and the second muffler 153 can be assembled by press-fitting. The first filter 310 may be fitted to the first muffler 151 and the second muffler 153 by press-fitting.

In detail, the first muffler 151 is formed with a groove 151a to which at least a part of the second muffler 153 is coupled. The second muffler 153 includes a protrusion 153a inserted into the groove 151a of the first muffler 151. [

The first filter 310 may be supported by the first and second mufflers 151 and 153 in a state where both side portions of the first filter 310 are interposed between the groove portion 151a and the protrusion 153a. have.

When the first filter 310 is moved between the first and second mufflers 151 and 153 so that the first muffler 151 and the second muffler 153 are moved toward each other, Both side portions of the first filter 310 may be fixed between the groove 151a and the protrusion 153a.

As described above, the first filter 310 is provided in the suction muffler 150, so that the foreign matter having a predetermined size or more of the refrigerant sucked through the suction unit 104 can be filtered by the first filter 310 . Accordingly, the foreign matter is contained in the refrigerant acting as the gas bearing between the piston 130 and the cylinder 120, and can be prevented from flowing into the cylinder 120.

Further, since the first filter 310 is firmly fixed to the press-fitted portion of the first and second mufflers 151 and 153, the suction muffler 150 can be prevented from being separated from the first filter 310.

The first muffler 151 is formed with the groove 151a and the second muffler 153 is formed with the protrusion 153a. Alternatively, the first muffler 151 may be provided with the projection 151a, And a groove may be formed in the second muffler 153.

FIG. 6 is a cross-sectional view showing a state in which a second filter according to an embodiment of the present invention is disposed, FIG. 7 is an exploded perspective view showing a configuration of a cylinder and a frame according to an embodiment of the present invention, Fig. 6 is an exploded perspective view of a frame according to an example.

6 to 8, a linear compressor 100 according to an embodiment of the present invention is provided with a high-pressure gas refrigerant pipe (not shown) provided between a frame 110 and a cylinder 120 and discharged through a discharge valve 161, And a second filter 320 for filtering the input signal.

The second filter 320 may be positioned at a portion where the frame 110 and the cylinder 120 are coupled to each other or at a coupling surface.

Specifically, the cylinder 120 includes a substantially cylindrical cylinder body 121 and a cylinder flange portion 125 extending radially from the cylinder body 121.

The cylinder body 121 includes a gas inflow portion 122 into which the discharged gas refrigerant flows. The gas inlet 122 may be formed in a circular shape along the outer peripheral surface of the cylinder body 121.

A plurality of gas inflow portions 122 may be provided. The plurality of gas inflow portions 122 are provided with gas inflow portions 122a and 122b (see FIG. 10) located at one side from the axial center portion of the cylinder body 121 and gas inflow portions (See Fig. 10).

The cylinder flange portion 125 is provided with a coupling portion 126 to be engaged with the frame 110. The coupling portion 126 may be configured to protrude outward from the outer circumferential surface of the cylinder flange portion 125. The fastening portion 126 may be coupled to the cylinder fastening hole 118 of the frame 110 by a predetermined fastening member.

The cylinder flange portion 125 includes a seating surface 127 that is seated on the frame 110. The seating surface 127 may be a rear portion of the cylinder flange 125 extending radially from the cylinder body 121.

The frame 110 includes a frame body 111 surrounding the cylinder body 121 and a cover coupling part 115 extending in the radial direction of the frame body 111 and coupled to the discharge cover 160. [ .

The cover engaging portion 115 is provided with a plurality of cover engaging holes 116 into which the engaging members engaged with the discharge cover 160 are inserted and a plurality of cylinder engaging portions And a fastening hole 118 is formed. The cylinder fastening hole 118 is formed at a position slightly recessed from the cover engaging portion 115.

The frame 110 is provided with a depressed portion 117 which is recessed rearward from the cover engaging portion 115 and into which the cylinder flange portion 125 is inserted. That is, the depressed portion 117 may be disposed so as to surround the outer circumferential surface of the cylinder flange portion 125. The depressed depth of the depressed portion 117 may correspond to the front and rear width of the cylinder flange portion 125.

A predetermined refrigerant flow space may be formed between the inner circumferential surface of the depression 117 and the outer circumferential surface of the cylinder flange portion 125. [ The high-pressure gas refrigerant discharged from the discharge valve 161 can flow toward the outer circumferential surface of the cylinder body 121 via the refrigerant flow space. The second filter 320 may be installed in the refrigerant flow space to filter the refrigerant.

In detail, a seating part 113 provided stepwise is formed at the rear end of the depression 117. A ring-shaped second filter 320 may be seated on the seating portion 113.

When the cylinder 120 is coupled to the frame 110 in a state where the second filter 320 is seated on the seating part 113, the cylinder flange 125 is connected to the second filter 320, The second filter 320 is pressed in front of the second filter 320. That is, the second filter 320 may be interposed between the seating portion 113 of the frame 110 and the seating surface 127 of the cylinder flange portion 125.

The second filter 320 blocks the foreign matter from the high-pressure gas refrigerant discharged through the opened discharge valve 161 from flowing into the gas inlet 122 of the cylinder 120, As shown in FIG.

For example, the second filter 320 may include a nonwoven fabric made of PET (Polyethylene Terephthalate) fiber or an absorbent. The PET has an advantage of excellent heat resistance and mechanical strength. It is also possible to block foreign matter of 2 mu m or more in the refrigerant.

The high-pressure gas refrigerant that has passed through the space between the inner circumferential surface of the depression 117 and the outer circumferential surface of the cylinder flange portion 125 passes through the second filter 320 and the refrigerant is filtered .

FIG. 9 is a cross-sectional view showing a combined state of a cylinder and a piston according to an embodiment of the present invention, FIG. 10 is a view showing a configuration of a cylinder according to an embodiment of the present invention, Fig.

9 to 11, a cylinder 120 according to an embodiment of the present invention includes a cylinder body 121 having a substantially cylindrical shape and defining a first body end 121a and a second body end 121b, And a cylinder flange portion 125 extending radially outward from the second body end portion 121b of the cylinder body 121. [

The first body end 121a and the second body end 121b form both ends of the cylinder body 121 with respect to the axial center 121c of the cylinder body 121. [

The cylinder body 121 is formed with a plurality of gas inflow portions 122 through which at least a part of the high-pressure gas refrigerant discharged through the discharge valve 161 flows. A third filter 330 may be disposed in the plurality of gas inlet portions 122.

The plurality of gas inlet portions 122 are configured to be recessed from the outer peripheral surface of the cylinder body 121 by a predetermined depth and width. The refrigerant may be introduced into the cylinder body 121 through the plurality of gas inlet portions 122 and the nozzle portion 123.

The introduced refrigerant is positioned between the outer circumferential surface of the piston 130 and the inner circumferential surface of the cylinder 120 and functions as a gas bearing for the movement of the piston 130. That is, the outer circumferential surface of the piston 130 is kept spaced from the inner circumferential surface of the cylinder 120 by the pressure of the refrigerant.

The plurality of gas inlet portions 122 are provided with a first gas inlet portion 122a and a second gas inlet portion 122b located at one side from the axial center portion 121c of the cylinder body 121, And a third gas inflow portion 122c located on the other side from the direction center portion 121c.

The first and second gas inflow portions 122a and 122b are located closer to the second body end portion 121b with respect to the axial center portion 121c of the cylinder body 121, The first body portion 122c may be located closer to the first body end 121a with respect to the axial center portion 121c of the cylinder body 121. [

That is, the plurality of gas inlet portions 122 are arranged in an asymmetric number with reference to the axial center portion 121c of the cylinder body 121.

3, the internal pressure of the cylinder 120 is higher than that of the first body end 121a near the suction side of the refrigerant, closer to the second body end 121b closer to the discharge side of the compressed refrigerant A larger number of gas inlet portions 122 are formed on the second body end portion 121b side to enhance the function of the gas bearing and a relatively small gas inlet portion 122 on the first body end portion 121a side ) Can be formed.

The cylinder body 121 further includes a nozzle part 123 extending from the plurality of gas inflow parts 122 toward the inner circumferential surface of the cylinder body 121. The nozzle unit 123 is formed to have a width or a size smaller than the gas inlet 122.

A plurality of nozzle portions 123 may be formed along the gas inlet portion 122 extending in a circular shape. The plurality of nozzle units 123 are disposed apart from each other.

The nozzle unit 123 includes an inlet 123a connected to the gas inlet 122 and an outlet 123b connected to the inner circumferential surface of the cylinder body 121. The nozzle unit 123 is formed to have a predetermined length from the inlet 123a toward the outlet 123b.

The recessed depth and width of the plurality of gas inflow portions 122 and the length of the nozzle portion 123 are determined by the rigidity of the cylinder 120, the amount of the third filter 330, And the size of the pressure drop of the refrigerant passing through the refrigerant passage.

For example, if the recessed depth and width of the plurality of gas inflow portions 122 are too large or the length of the nozzle portion 123 is too small, the rigidity of the cylinder 120 may be weakened.

On the other hand, if the recessed depth and width of the plurality of gas inlet portions 122 are too small, the amount of the third filter 330 that can be installed in the gas inlet portion 122 may be too small.

If the length of the nozzle part 123 is too large, the pressure drop of the refrigerant passing through the nozzle part 123 becomes too large, so that a sufficient function as a gas bearing can not be achieved.

The diameter of the inlet portion 123a of the nozzle portion 123 is larger than the diameter of the outlet portion 123b.

In detail, when the diameter of the nozzle part 123 is too large, the amount of the refrigerant flowing into the nozzle part 123 of the high-pressure gas refrigerant discharged through the discharge valve 161 becomes too large, Is increased.

On the other hand, if the diameter of the nozzle part 123 is too small, the pressure drop in the nozzle part 123 becomes large, and the performance as a gas bearing is reduced.

Therefore, in this embodiment, the diameter of the inlet 123a of the nozzle 123 is relatively increased to reduce the pressure drop of the refrigerant flowing into the nozzle 123, and the diameter of the outlet 123b So that the inflow amount of the gas bearing through the nozzle unit 123 can be adjusted to a predetermined value or less.

The third filter 330 functions to block foreign substances from entering into the cylinder 120 and adsorb the oil contained in the refrigerant. Here, the predetermined size may be 1 [mu] m.

The third filter 330 includes a thread wound around the gas inlet 122. In detail, the thread may be made of PET (Polyethylene Terephthalate) material and have a predetermined thickness or diameter.

The thickness or diameter of the thread may be determined to an appropriate value in consideration of the strength of the thread. If the thickness or diameter of the thread is too small, the strength of the thread becomes too weak to be easily broken, and when the thickness or diameter of the thread becomes too large, The gap in the gas inlet 122 becomes too large and the filtering effect of the foreign matter becomes low.

For example, the thickness or diameter of the thread is formed in units of several hundreds of micrometers, and the thread may be composed of a plurality of strands of a spun thread of several tens of μm.

The thread is wound several times and its end is fixed with a knot. The number of times the thread is wound can be appropriately selected in consideration of the degree of pressure drop of the gas refrigerant and the filtering effect of foreign matter. If the number of windings is too large, the pressure drop of the gas refrigerant becomes too large, and if the number of windings is too small, filtering of the foreign matter may not be performed well.

The tension force of the thread is formed in an appropriate size in consideration of the deformation of the cylinder 120 and the fixing force of the thread. If the tension is too large, the cylinder 120 may be deformed. If the tension is too small, the thread may not be fixed to the gas inlet 122.

12 is a cross-sectional view illustrating a refrigerant flow of a linear compressor according to an embodiment of the present invention. Referring to Fig. 12, the refrigerant flow in the linear compressor according to the present embodiment will be briefly described.

Referring to FIG. 12, the refrigerant flows into the interior of the shell 101 through the suction portion 104 and flows into the suction muffler 150 through the suction guide portion 155.

The refrigerant flows into the second muffler 153 via the first muffler 151 of the suction muffler 150 and flows into the interior of the piston 130. [ In this process, the suction noise of the refrigerant can be reduced.

On the other hand, the refrigerant can be filtered through the first filter 310 provided in the suction muffler 150, and the foreign matter having a predetermined size (25 mu m) or more can be filtered.

The refrigerant passing through the suction muffler 150 and existing in the piston 130 is sucked into the compression space P through the suction hole 133 when the suction valve 135 is opened.

When the refrigerant pressure in the compression space P becomes equal to or higher than the discharge pressure, the discharge valve 161 is opened and the refrigerant is discharged to the discharge space of the discharge cover 160 through the opened discharge valve 161, Flows to the discharge portion 105 through the loop pipe 165 coupled to the compressor 160 and is discharged to the outside of the compressor 100.

At least a part of the refrigerant in the refrigerant present in the discharge space of the discharge cover 160 flows into the space existing between the cylinder 120 and the frame 110, that is, the inner peripheral surface of the depression 117 of the frame 110, And can flow toward the outer circumferential surface of the cylinder body 121 via a flow space formed between the outer circumferential surfaces of the cylinder flange portions 125 of the cylinder 120.

The refrigerant can pass through the second filter 320 interposed between the seating surface 127 of the cylinder flange portion 125 and the seating portion 113 of the frame 110. In this process, (2 탆) or more can be filtered. The oil in the refrigerant can be adsorbed to the second filter 320.

The refrigerant having passed through the second filter 320 flows into a plurality of gas inflow portions 122 formed on the outer circumferential surface of the cylinder body 121. As the refrigerant passes through the third filter 330 provided in the gas inlet 122, the foreign matter having a predetermined size (1 μm or more) contained in the refrigerant can be filtered, and the oil contained in the refrigerant can be adsorbed have.

The refrigerant that has passed through the third filter 330 flows into the cylinder 120 through the nozzle unit 123 and is positioned between the inner circumferential surface of the cylinder 120 and the outer circumferential surface of the piston 130, 130) from the inner circumferential surface of the cylinder 120 (gas bearing).

As such, the high-pressure gas refrigerant acts as a bearing for the reciprocating piston 130 bypassed into the cylinder 120, thereby reducing wear between the piston 130 and the cylinder 120 . By not using the oil for the bearing, even if the compressor 100 is operated at a high speed, friction loss due to oil can be prevented.

Further, by providing a plurality of filters on the path of the refrigerant flowing in the compressor 100, the foreign matter contained in the refrigerant can be removed, thereby improving the reliability of the refrigerant serving as the gas bearing. Accordingly, it is possible to prevent a phenomenon that the piston 130 or the cylinder 120 is abraded by foreign matter contained in the refrigerant.

Further, by removing the oil contained in the refrigerant by the plurality of filters, frictional loss due to oil can be prevented from occurring.

The first filter 310, the second filter 320, and the third filter 330 may be collectively referred to as a "filter device" in that they filter the refrigerant to serve as a gas bearing.

That is, the filter device includes at least one filter member provided on the "refrigerant passage" from the suction portion 104 to the nozzle portion 123 via the discharge valve 161, The foreign matter or oil in the refrigerant to be introduced into the nozzle unit 123 may be filtered.

Hereinafter, another embodiment of the present invention will be described. The present embodiment differs from the first filter in the arrangement of the second filter, but the other aspects are the same as those in the previous embodiment, and therefore differences will be mainly described.

13 is a cross-sectional view showing a state in which a second filter according to another embodiment of the present invention is disposed.

13, the linear compressor 100 according to another embodiment of the present invention includes a second filter (not shown) provided between the outer circumferential surface of the cylinder flange portion 125 and the inner circumferential surface of the depression 117 of the frame 110 420).

The second filter 420 extends in the axial direction of the compressor 100 from the front end of the cylinder flange portion 125. With this configuration, at least a part of the refrigerant discharged through the discharge valve 161 can flow backward along the longitudinal direction of the second filter 420.

The second filter 420 may include a nonwoven fabric made of PET (polyethylene terephthalate) fiber or an adsorbent. The PET has an advantage of excellent heat resistance and mechanical strength. It is also possible to block foreign matter of 2 mu m or more in the refrigerant.

The second filter 420 is disposed in the space between the cylinder 120 and the frame 110 so that the foreign matter in the refrigerant can be filtered and the oil can be adsorbed.

100: Linear compressor 101: Shell
110: frame 111: frame body
115: cover coupling portion 117: depression
120: cylinder 121: cylinder body
122: gas inlet part 123: nozzle part
125: cylinder flange part 127: seat face
130: Piston 140: Motor assembly
150: Suction muffler 160: Discharge cover
161: Discharge valve 162: Valve spring
171,172: leaf spring 176: spring
200: dryer 220: first dryer filter
230: second dryer filter 240: third dryer filter
310: first filter 320: second filter
330: third filter

Claims (23)

  1. A shell provided with a suction portion;
    A cylinder disposed inside the shell and forming a compression space for the refrigerant;
    A piston provided to be axially reciprocable within the cylinder;
    A discharge valve provided at one side of the cylinder for selectively discharging compressed refrigerant in a compression space of the refrigerant;
    A nozzle unit formed in the cylinder and introducing at least a part of the refrigerant discharged through the discharge valve into the cylinder; And
    And a filter device installed inside the shell,
    In the filter device,
    And at least one filter member provided on the refrigerant flow path from the suction portion to the nozzle portion via the discharge valve,
    Wherein the refrigerant passes through the at least one filter member and the foreign matter or oil in the refrigerant to be introduced into the nozzle unit is filtered.
  2. The method according to claim 1,
    And a suction muffler provided inside the shell for reducing noise of the refrigerant sucked through the suction portion,
    Wherein the filter device includes a first filter provided in the suction muffler.
  3. 3. The method of claim 2,
    Wherein the suction muffler includes a first muffler and a second muffler,
    And the first filter is installed at a joint portion between the first muffler and the second muffler.
  4. The method of claim 3,
    A groove formed in one of the first muffler and the second muffler; And
    Further comprising a projection formed on the other one of the first muffler and the second muffler and coupled to the groove,
    And both side portions of the first filter are interposed between the groove portion and the protrusion portion.
  5. 3. The method of claim 2,
    Wherein the first filter comprises a material having magnetic properties.
  6. 3. The method of claim 2,
    Wherein the first filter is made of stainless steel.
  7. The method according to claim 1,
    Further comprising a frame fixed to the outside of the cylinder,
    Wherein the filter device includes a second filter installed in a refrigerant flow space between the cylinder and the frame.
  8. 8. The method of claim 7,
    Wherein the cylinder includes a cylinder body and a cylinder flange portion extending radially outward of the cylinder body,
    Wherein the frame is provided with a depressed portion into which the cylinder flange portion is inserted and a seat portion on which one surface of the cylinder flange portion is seated.
  9. 9. The method of claim 8,
    And the second filter is placed in the seating portion of the frame.
  10. 9. The method of claim 8,
    And the second filter is placed between the outer peripheral surface of the cylinder flange portion and the inner peripheral surface of the depressed portion.
  11. 8. The method of claim 7,
    And the second filter has a ring shape.
  12. 8. The method of claim 7,
    Wherein the second filter includes a nonwoven fabric made of PET (Polyethylene Terephthalate).
  13. The method according to claim 1,
    Further comprising a gas inflow portion that is recessed from an outer circumferential surface of the cylinder and communicates with the nozzle portion,
    Wherein the filter device includes a third filter provided in the gas inlet.
  14. 14. The method of claim 13,
    In the third filter,
    And a thread having a predetermined thickness or diameter is included.
  15. 15. The method of claim 14,
    Wherein the thread is made of PET (polyethylene terephthalate) material.
  16. 15. The method of claim 14,
    Wherein the thread is installed to be wound on the gas inlet many times.
  17. A linear compressor including a reciprocating piston and a cylinder having an outer circumferential surface for receiving the piston and for introducing a refrigerant;
    A filter device provided inside the linear compressor for filtering refrigerant flowing into an outer circumferential surface of the cylinder;
    A condenser for condensing the refrigerant compressed in the linear compressor; And
    And a dryer for removing foreign matter or oil in the refrigerant condensed in the condenser,
    In the dryer,
    And an adsorbent for adsorbing the oil contained in the refrigerant.
  18. 18. The method of claim 17,
    In the adsorbent,
    A refrigerator including a molecular sieve (Molecular Sieve) having a granular shape and forming a plurality of holes for adsorbing oil,
  19. 18. The method of claim 17,
    In the adsorbent,
    A refrigerator comprising an oil absorber or nonwoven fabric.
  20. 18. The method of claim 17,
    In the dryer,
    A first dryer filter provided inside the inlet side of the dryer;
    A second dryer filter supported by the first dryer filter, the second dryer filter including the adsorbent; And
    And a third dryer filter that supports the second dryer filter and is provided inside the outlet side of the dryer.
  21. 18. The method of claim 17,
    In the filter device,
    And a first filter provided in a suction muffler for reducing flow noise of a refrigerant sucked into the linear compressor.
  22. 18. The method of claim 17,
    In the filter device,
    And a second filter provided at one side of the cylinder for filtering at least a portion of the refrigerant discharged from the cylinder.
  23. 18. The method of claim 17,
    In the filter device,
    And a third filter disposed so as to be wound on an outer circumferential surface of the cylinder.
KR1020140078763A 2014-06-26 2014-06-26 A linear compressor and a refrigerator including the same KR20160001056A (en)

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Application Number Priority Date Filing Date Title
KR1020140078763A KR20160001056A (en) 2014-06-26 2014-06-26 A linear compressor and a refrigerator including the same

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
KR1020140078763A KR20160001056A (en) 2014-06-26 2014-06-26 A linear compressor and a refrigerator including the same
US14/661,228 US20150377531A1 (en) 2014-06-26 2015-03-18 Linear compressor and refrigerator including a linear compressor
CN201510187731.6A CN105298794B (en) 2014-06-26 2015-04-20 Linearkompressor and the refrigerator including the Linearkompressor
EP15165763.2A EP2960508A3 (en) 2014-06-26 2015-04-29 Linear compressor and refrigerator including a linear compressor
JP2015126203A JP6594675B2 (en) 2014-06-26 2015-06-24 Linear compressor and refrigerator including the same
BR102015015403A BR102015015403A2 (en) 2014-06-26 2015-06-25 linear compressor and cold room comprising a linear compressor

Publications (1)

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KR20160001056A true KR20160001056A (en) 2016-01-06

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KR1020140078763A KR20160001056A (en) 2014-06-26 2014-06-26 A linear compressor and a refrigerator including the same

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US (1) US20150377531A1 (en)
EP (1) EP2960508A3 (en)
JP (1) JP6594675B2 (en)
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017126871A1 (en) * 2016-01-19 2017-07-27 Lg Electronics Inc. Linear compressor

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20170124911A (en) * 2016-05-03 2017-11-13 엘지전자 주식회사 linear compressor
KR20180000602A (en) * 2016-06-23 2018-01-03 엘지전자 주식회사 Transvers flux type recyprocating motor and recyprocating compressor having the same
CN108425827B (en) * 2016-07-21 2020-05-12 陕西仙童科技有限公司 Compression unit and oil-free lubrication linear compressor
KR20180079026A (en) * 2016-12-30 2018-07-10 엘지전자 주식회사 Linear compressor
KR101990146B1 (en) * 2018-01-12 2019-06-18 엘지전자 주식회사 Linear compressor and refrigerator including the same
KR20190118426A (en) * 2018-04-10 2019-10-18 엘지전자 주식회사 Linear compressor
CN110259663A (en) * 2019-06-25 2019-09-20 辽宁工程技术大学 A kind of novel moving-magnetic type reciprocal linear compressor

Family Cites Families (53)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US567387A (en) * 1896-09-08 Coffee or tea percolator
US789062A (en) * 1905-02-20 1905-05-02 Arah W Prescott Strainer.
US2907304A (en) * 1957-04-04 1959-10-06 Macks Elmer Fred Fluid actuated mechanism
US3044688A (en) * 1959-10-12 1962-07-17 Trane Co Hermetic compressor
US3894855A (en) * 1974-01-28 1975-07-15 Tecumseh Products Co Compressor inlet filter
JPS53109265A (en) * 1977-03-04 1978-09-22 Nec Corp Magnetic separator apparatus
US4743176A (en) * 1986-06-18 1988-05-10 Tecumseh Products Company Gas flow system for a compressor
IT1260703B (en) * 1992-07-03 1996-04-22 Necchi Compressori Silencer for motor compressors for refrigeration equipment
US5328338A (en) * 1993-03-01 1994-07-12 Sanyo Electric Co., Ltd. Hermetically sealed electric motor compressor
KR0153347B1 (en) * 1994-03-15 1999-01-15 사토 후미오 Refrigeration cycle and apparatus using hydrofluoro-carbon composition
US5848326A (en) * 1996-10-18 1998-12-08 Ricoh Company, Ltd. Toner conveying method and device for an image forming apparatus
US6039871A (en) * 1998-09-25 2000-03-21 Pierce Chemical Company Small dialysis device
US6220050B1 (en) * 1998-11-24 2001-04-24 Tecumseh Products Company Suction accumulator
US6176093B1 (en) * 1999-09-15 2001-01-23 Airsept, Inc. Automotive air conditioning refrigerant filter and method
CA2337987A1 (en) * 2000-02-25 2001-08-25 Elmex Limited Membrane filtration system
DE10114327C2 (en) * 2001-03-23 2003-07-03 Danfoss Compressors Gmbh suction silencer
JP4956703B2 (en) * 2001-06-08 2012-06-20 ワールプール・エシ・ア Closed reciprocating compressor suction muffler
WO2003036071A2 (en) * 2001-10-19 2003-05-01 Global Cooling Bv Porous restrictor for gas bearing
EP1336783A3 (en) * 2002-02-19 2003-09-03 SCHROTT, Harald Bistable electromagnetic valve
KR100504910B1 (en) * 2002-12-20 2005-07-29 엘지전자 주식회사 Reciprocating compressor for refrigerator
BR0300905B1 (en) * 2003-03-28 2011-06-28 suction filter closure system for airtight compressor.
NZ526361A (en) * 2003-05-30 2006-02-24 Fisher & Paykel Appliances Ltd Compressor improvements
CN2752490Y (en) * 2004-11-04 2006-01-18 梁少明 Air compressor
DE102004061941B4 (en) * 2004-12-22 2014-02-13 AeroLas GmbH Aerostatische Lager- Lasertechnik Axially driven piston-cylinder unit
DE102004061940A1 (en) * 2004-12-22 2006-07-06 Aerolas Gmbh, Aerostatische Lager- Lasertechnik Piston-cylinder-unit for use in compressor, has fluid storage provided between piston and cylinder and formed by fluid discharged from discharging nozzles into storage opening under pressure
US20080000348A1 (en) * 2004-12-23 2008-01-03 Bsh Bosch Und Siemens Hausgerate Gmbh Linear Compressor
DE102005001470B3 (en) * 2005-01-12 2006-07-20 Aerolas Gmbh, Aerostatische Lager- Lasertechnik Axially driven piston-cylinder unit
JP2006329142A (en) * 2005-05-30 2006-12-07 Matsushita Electric Ind Co Ltd Sealed compressor
KR20070004340A (en) * 2005-07-04 2007-01-09 삼성전자주식회사 Pipe insert type filter and air conditioner having the same
CN100439817C (en) * 2006-01-27 2008-12-03 中国科学院理化技术研究所 Electronic optical equipment of long-wave infrared detector directly cooled by pulse tube refrigerating machine
DE102006009273A1 (en) * 2006-02-28 2007-08-30 BSH Bosch und Siemens Hausgeräte GmbH Refrigeration device especially a cooling- and/or refrigeration cabinet, has kinetic energy of compressor piston stored with intermediate storage medium during intermittent oscillating movement by compression of gaseous fluid
DE102006009274A1 (en) * 2006-02-28 2007-08-30 BSH Bosch und Siemens Hausgeräte GmbH Linear compressor for cooling device has compressor piston mounted in piston housing with aid of housing with openings, gaseous fluid flowing through openings, outflow device for fluid condensate
BRPI0601716B1 (en) * 2006-05-03 2018-09-25 Empresa Brasileira De Compressores S A Embraco acoustic filter resonator arrangement for refrigeration compressor
BRPI0602962A (en) * 2006-07-06 2008-02-26 Whirlpool Sa acoustic damper for refrigeration compressor
AT512300T (en) * 2006-07-12 2011-06-15 Delphi Tech Holding Sarl Dosing pump for a reducer
DE102006042021A1 (en) * 2006-09-07 2008-03-27 BSH Bosch und Siemens Hausgeräte GmbH Compressor with gas-bearing piston
DE102006052447A1 (en) * 2006-11-07 2008-05-08 BSH Bosch und Siemens Hausgeräte GmbH Linear compressor and gas pressure bearing for it
KR101484306B1 (en) * 2007-10-24 2015-01-20 엘지전자 주식회사 Linear compressor
CN101835982B (en) * 2007-10-24 2013-10-02 Lg电子株式会社 Linear compressor
KR101307688B1 (en) 2007-11-01 2013-09-12 엘지전자 주식회사 Linear compressor
DE102007054334A1 (en) * 2007-11-14 2009-05-20 BSH Bosch und Siemens Hausgeräte GmbH Aerostatic bearing and process for its production
WO2010016723A1 (en) * 2008-08-07 2010-02-11 엘지전자 주식회사 Linear compressor
US9089248B2 (en) * 2009-02-16 2015-07-28 Samsung Electronics Co., Ltd. Fan motor apparatus having diffuser unit for vacuum cleaner
JP2012207620A (en) * 2011-03-30 2012-10-25 Sanyo Electric Co Ltd Scroll type compressor
JP5632334B2 (en) * 2011-06-10 2014-11-26 サンデン株式会社 Compressor suction muffler
KR101299553B1 (en) * 2011-09-06 2013-08-23 엘지전자 주식회사 Reciprocating compressor with gas bearing
BRPI1105473A2 (en) * 2011-11-16 2016-01-19 Whirlpool Sa flow restrictor and gas compressor
EP3130804B1 (en) * 2012-08-24 2018-12-12 LG Electronics Inc. Reciprocating compressor
CN104662296B (en) * 2012-09-03 2017-06-20 Lg电子株式会社 Reciprocating compressor and the method for driving the reciprocating compressor
KR101911292B1 (en) * 2012-09-03 2018-10-24 엘지전자 주식회사 Reciprocating compressor
US9248407B2 (en) * 2012-09-14 2016-02-02 Pierce Biotechnology, Inc. Dialysis device
KR102121585B1 (en) * 2013-09-16 2020-06-11 엘지전자 주식회사 Reciprocating compressor
KR20160000301A (en) * 2014-06-24 2016-01-04 엘지전자 주식회사 A linear compressor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017126871A1 (en) * 2016-01-19 2017-07-27 Lg Electronics Inc. Linear compressor
US10400757B2 (en) 2016-01-19 2019-09-03 Lg Electronics Inc. Linear compressor

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