KR20000038304A - Oil supply structure of linear compressor - Google Patents

Oil supply structure of linear compressor Download PDF

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Publication number
KR20000038304A
KR20000038304A KR1019980053256A KR19980053256A KR20000038304A KR 20000038304 A KR20000038304 A KR 20000038304A KR 1019980053256 A KR1019980053256 A KR 1019980053256A KR 19980053256 A KR19980053256 A KR 19980053256A KR 20000038304 A KR20000038304 A KR 20000038304A
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KR
South Korea
Prior art keywords
oil
cylinder
piston
hole
linear compressor
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KR1019980053256A
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Korean (ko)
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KR100292512B1 (en
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권병하
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구자홍
엘지전자 주식회사
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B35/00—Piston 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
    • F04B35/04—Piston 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
    • F04B35/045—Piston 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component 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
    • F04B39/02—Lubrication
    • F04B39/0223—Lubrication characterised by the compressor type
    • F04B39/023—Hermetic compressors
    • F04B39/0261—Hermetic compressors with an auxiliary oil pump
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component 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
    • F04B39/02—Lubrication
    • F04B39/0284—Constructional details, e.g. reservoirs in the casing
    • F04B39/0292—Lubrication of pistons or cylinders
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2210/00—Working fluid
    • F05B2210/10—Kind or type
    • F05B2210/12—Kind or type gaseous, i.e. compressible
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S417/00—Pumps
    • Y10S417/902—Hermetically sealed motor pump unit

Abstract

PURPOSE: An oil supply structure of a linear compressor is provided to smoothly introduce oil supplied to a first oil pocket via an oil introducing passage, an oil circulation passage and oil communicating passage to a second oil pocket so that lack of oil in a sliding part between a cylinder and a piston is prevented. CONSTITUTION: In an oil supply structure of a linear compressor, oil supplied from a oil feeder is introduced between a cylinder of a compression unit and a piston and returns to a sealing container via oil through holes(110,120) respectively formed at the suction and discharge parts, and an oil collecting groove(130) is formed around the oil through hole at the suction part for collecting the oil supplied from the oil feeder and introducing to between the cylinder and the piston, wherein the oil collecting groove is engraved on an outer periphery of the cylinder and has a bottom surface depressed toward the oil through hole.

Description

리니어 압축기의 오일 공급구조Oil supply structure of the linear compressor

본 발명은 리니어 압축기의 실린더에 관한 것으로, 특히 압축기의 재기동시 실린더와 피스톤 사이의 미끄럼부에 오일 부족현상이 발생되지 않도록 하는데 적합한 리니어 압축기의 오일 공급구조에 관한 것이다.The present invention relates to a cylinder of a linear compressor, and more particularly, to an oil supply structure of a linear compressor suitable for preventing oil shortage from occurring in the sliding portion between the cylinder and the piston when the compressor is restarted.

알려진 바와 같이, 일반적인 리니어 압축기는 크랭크축을 대신하여 리니어 모터를 이루는 마그네트 및 코일로 피스톤을 직선 왕복운동시켜 가스를 압축하여 토출시키는 것으로, 그 일례가 도 1에 도시되어 있다.As is known, a general linear compressor compresses and discharges a gas by linearly reciprocating a piston with a magnet and a coil forming a linear motor in place of a crank shaft, and an example thereof is illustrated in FIG. 1.

이에 도시된 바와 같이, 종래의 리니어 압축기는 저면에 오일이 채워진 밀폐용기(V)의 내부에 횡방향으로 설치되어 냉매를 흡입하여 압축 및 토출하는 압축 유니트(C)와, 그 압축 유니트(C)의 외부에 고정되어 밀폐용기(V)에 채워진 오일을 펌핑하여 미끄럼부에 공급하는 오일피더(O)로 구성되어 있다.As shown in the drawing, a conventional linear compressor has a compression unit (C) installed in the transverse direction inside an airtight container (V) filled with oil on its bottom surface to suck, compress, and discharge refrigerant, and the compression unit (C). It is composed of an oil feeder (O) which is fixed to the outside of the oil supply to the sliding part by pumping the oil filled in the sealed container (V).

상기 압축 유니트(C)는 밀폐용기(V)의 내부에 설치되는 프레임(1)과, 그 프레임(1)의 중앙에 형성된 관통구멍에 삽입되는 실린더(2)와, 그 실린더(2) 내부에 삽입되어 리니어 모터(미부호)의 구동에 의해 직선 왕복운동하는 피스톤(3)과, 그 피스톤(3)의 왕복운동에 따라 상기 실린더(2)를 개폐하는 토출밸브(5)가 삽입되어 상기한 실린더(3)의 일측에 복개 결합되는 토출커버(4)를 포함하여 이루어져 있다.The compression unit (C) includes a frame (1) installed inside the sealed container (V), a cylinder (2) inserted into a through hole formed in the center of the frame (1), and the inside of the cylinder (2). A piston 3 inserted and linearly reciprocated by driving of a linear motor (unsigned), and a discharge valve 5 for opening and closing the cylinder 2 in accordance with the reciprocating motion of the piston 3 are inserted and It comprises a discharge cover 4 is coupled to one side of the cylinder (3).

상기 프레임(1)의 관통구멍 내주면에는 오일유입유로(1a)에 의해 오일피더(O)의 토출측에 연통되는 오일순환로(1b)가 실린더(2)의 외주면 및 프레임(1)의 관통구멍 그리고 토출커버(4)에 의해서 형성되고, 그 오일순환로(1b)의 최상점에서 프레임(1)의 내측으로 연통되는 오일연통로(1c)가 형성되며, 그 오일연통로(1c)의 단부에 환상의 제1 오일포켓(1d)이 실린더(2)의 외주면 사이에 형성되고, 상기 피스톤(3)의 외주면에는 제2 오일포켓(3a)이 형성되며, 상기 제1 오일포켓(1b)과 제2 오일포켓(3a)을 연통시키는 오일통공(2a,2a')이 실린더(2)의 최상점 및 최하점에 각각 관통 형성되고, 상기 프레임(1)의 오일유입유로(1a) 일측에는 상기한 오일이 오일순환로(1b) 및 오일연통로(1c) 및 제1,제2 오일포켓(1d)을 차례대로 순환한 다음 밀폐용기(V)로 복귀되도록 하는 오일복귀유로(미도시)가 상기 제1 오일포켓(1b)의 하반부쪽에 연통 형성되어 있다.On the inner circumferential surface of the through hole of the frame 1, an oil circulation path 1b communicating with the discharge side of the oil feeder O by the oil inflow passage 1a is formed on the outer circumferential surface of the cylinder 2 and the through hole of the frame 1 and discharged. The oil communication path 1c formed by the cover 4 and communicating with the inside of the frame 1 at the top of the oil circulation path 1b is formed, and is annular at the end of the oil communication path 1c. A first oil pocket 1d is formed between the outer circumferential surface of the cylinder 2, a second oil pocket 3a is formed on the outer circumferential surface of the piston 3, and the first oil pocket 1b and the second oil are formed. Oil through holes (2a, 2a ') for communicating the pocket (3a) is formed through the top and bottom of the cylinder (2), respectively, and the oil is oil on one side of the oil inflow passage (1a) of the frame (1) Oil return oil for circulating the circulation passage 1b, the oil communication passage 1c, and the first and second oil pockets 1d in turn, and then returning to the sealed container V. (Not shown) may also lower half is formed on the side of the communicating the first oil pocket (1b).

도면중 미설명 부호인 3b는 피스톤의 냉매유로, 6은 밸브스프링, 7은 흡입밸브이다.In the figure, reference numeral 3b denotes a refrigerant flow path of the piston, 6 is a valve spring, and 7 is a suction valve.

상기와 같이 구성된 종래 리니어 압축기는 다음과 같이 동작된다.The conventional linear compressor configured as described above is operated as follows.

즉, 상기 리니어 모터(미부호)의 고정자에 전류가 인가되어 가동자가 직선 왕복운동을 하게 되면, 그 가동자에 결합된 피스톤(3)이 실린더(2)내를 왕복운동하게 되고, 그 피스톤(3)이 실린더(2)내를 왕복운동함에 따라 밀폐용기(V)내로 유입된 냉매가스가 실린더(2)로 흡입되어 압축된 이후에 토출커버(4) 및 토출파이프(미도시) 그리고 루프파이프(미도시)를 차례대로 거쳐 외부로 토출되는 일련의 과정을 반복하게 된다.That is, when a current is applied to the stator of the linear motor (unsigned) and the mover linearly reciprocates, the piston 3 coupled to the mover reciprocates in the cylinder 2, and the piston ( 3) As the cylinder reciprocates in the cylinder 2, the refrigerant gas introduced into the sealed container V is sucked into the cylinder 2 and compressed, and then the discharge cover 4, the discharge pipe (not shown), and the loop pipe. A series of processes that are discharged to the outside through the (not shown) in sequence is repeated.

이때, 상기 프레임(1)의 하부에 결합된 오일피더(O)가 피스톤(3)의 왕복운동에 의한 진동으로 함께 유동을 하게 되어 밀폐용기(V)의 오일을 펌핑하게 되고, 그 펌핑된 오일은 오일유입유로(1a)를 통해 오일순환로(1b)로 유입되어 실린더(2) 및 리니어 모터에 발생된 열을 냉각시키면서 순환되고 난 다음에, 상기 오일연통로(1c)를 통해 제1 오일포켓(1d)로 유입되며, 그 제1 오일포켓(1d)에서 오일통공(2a)을 통해 제2 오일포켓(3a)으로 유입되어 실린더(2)와 피스톤(3) 사이의 미끄럼부를 윤활시킨 이후에 다시 제1 오일포켓(1b) 및 오일복귀유로(미도시)를 통해 밀폐용기(V)로 복귀하게 되는 것이었다.At this time, the oil feeder (O) coupled to the lower portion of the frame (1) is flowed together by the vibration by the reciprocating motion of the piston (3) to pump the oil of the sealed container (V), the pumped oil The silver is introduced into the oil circulation passage 1b through the oil inflow passage 1a and circulated while cooling the heat generated in the cylinder 2 and the linear motor, and then the first oil pocket through the oil communication passage 1c. (1d) flows into the second oil pocket (3a) through the oil through hole (2a) from the first oil pocket (1d) to lubricate the sliding portion between the cylinder (2) and the piston (3) It was to return to the sealed container (V) through the first oil pocket (1b) and the oil return flow path (not shown).

그러나, 상기와 같은 종래 리니어 압축기의 오일 공급구조에 있어서는, 상기 오일연통로(1c)의 단부가 제1 오일포켓(1d)의 전방측에 형성된 데 비해 유입측 오일통공(2a)은 상기한 제1 오일포켓(1d)의 후방측에 형성되어, 상기 오일연통로(1c)를 통해 제1 오일포켓(1d)으로 유입되는 오일의 많은 양이 상기한 유입측 오일통공(2a)을 통해 제2 오일포켓(3a)으로 유입되지 못하고 제1 오일포켓(1d)의 최하점에서 그대로 오일복귀유로(미도시)로 유출되고, 이로 인해 상기 실린더(2)와 피스톤(3)의 미끄럼부에 공급되는 오일이 부족하여 실린더(2) 또는 피스톤(3)에 마멸 등이 발생되는 문제점이 있었다.However, in the oil supply structure of the conventional linear compressor as described above, the inlet side oil through hole 2a is formed as described above, although the end portion of the oil communication passage 1c is formed at the front side of the first oil pocket 1d. 1 is formed on the rear side of the oil pocket (1d), a large amount of oil flowing into the first oil pocket (1d) through the oil communication path (1c) is the second through the inlet side oil through hole (2a) Oil does not flow into the oil pocket 3a and flows out of the oil return flow path (not shown) at the lowest point of the first oil pocket 1d, thereby supplying oil to the sliding portions of the cylinder 2 and the piston 3. There was a problem that the lack of such wear or the like in the cylinder (2) or the piston (3).

한편, 상기한 문제점을 감안하여 유입측 오일통공(2a)을 제1 오일포켓(1d)의 전방측으로 당겨 형성하게 되면 상기 오일통공(2a)이 피스톤(3)의 행정거리에 포함되어 피스톤(3)의 선단면이 오일통공(2a)에 걸려 압축기의 신뢰성이 저하될 우려가 있는 반면, 상기 오일유입유로(1a)를 후방측으로 밀어 형성하게 되면 프레임(1)의 전체적인 크기가 비대해지게 된다.On the other hand, when the inlet side oil through hole (2a) is formed in front of the first oil pocket (1d) in consideration of the above problems, the oil through hole (2a) is included in the stroke of the piston (3) piston (3) While the tip end face of the c) is caught by the oil through hole 2a, the reliability of the compressor may be deteriorated. However, when the oil inflow passage 1a is pushed to the rear side, the overall size of the frame 1 is enlarged.

이에 본 발명은 상기 오일유입유로 및 오일순환로 그리고 오일연통로를 통해 제1 오일포켓으로 유입되는 오일이 제2 오일포켓으로 원활하게 유입되도록 하여 상기한 실린더와 피스톤 사이의 미끄럼부에서 오일 부족 현상이 발생되지 않도록 하는 리니어 압축기의 오일 공급구조를 제공하려는데 본 발명의 목적이 있다.Accordingly, the present invention allows the oil flowing into the first oil pocket to flow smoothly into the second oil pocket through the oil inflow passage, the oil circulation passage, and the oil communication passage so that the oil shortage phenomenon in the sliding portion between the cylinder and the piston is prevented. It is an object of the present invention to provide an oil supply structure of a linear compressor that does not occur.

도 1은 종래 리니어 압축기의 일례를 파단하여 보인 측면도.1 is a side view showing an example of a conventional linear compressor broken.

도 2a 및 도 2b는 도 1의 "A"부를 보인 상세도.2A and 2B are detailed views showing part “A” of FIG. 1.

도 3은 본 발명 리니어 압축기의 일례를 파단하여 보인 측면도.Figure 3 is a side view showing an example of the linear compressor of the present invention broken.

도 4a 및 도 4b는 도 3의 "B"부를 보인 상세도.4A and 4B are detailed views showing a portion “B” of FIG. 3.

* 도면의 주요부분에 대한 부호의 설명 *Explanation of symbols on the main parts of the drawings

1 : 프레임 1c : 오일연통로1: frame 1c: oil communication path

1d : 제1 오일포켓 3 : 피스톤1d: first oil pocket 3: piston

3a : 제2 오일포켓 100 : 실린더3a: second oil pocket 100: cylinder

110,120 : 유입측, 유출측 오일통공 130 : 오일포집홈110,120: oil inlet side, oil outlet side 130: oil collection groove

이와 같은 본 발명의 목적을 달성하기 위하여, 오일피더로부터 공급되는 오일이 압축 유니트의 실린더와 피스톤 사이로 유입되었다가 다시 밀폐용기로 복귀되도록 실린더에 유입측 오일통공 및 유출측 오일통공이 각각 구비되어 이루어지는 리니어 압축기의 오일 공급구조에 있어서, 상기 유입측 오일통공의 주위에 오일포집홈이 형성되어 오일피더로부터 공급되는 오일이 상기한 오일포집홈에 고여 실린더와 피스톤 사이로 유입되도록 하는 것을 특징으로 하는 리니어 압축기의 오일 공급구조가 제공된다.In order to achieve the object of the present invention, the oil supplied from the oil feeder is provided between the cylinder and the piston of the compression unit and the inlet side oil through hole and the outlet side oil through hole so as to return to the closed container, respectively In the oil supply structure of the linear compressor, an oil collecting groove is formed around the inlet oil through-hole so that oil supplied from the oil feeder collects in the oil collecting groove and flows between the cylinder and the piston. Oil supply structure is provided.

이하, 본 발명에 의한 리니어 압축기의 오일 공급구조를 첨부도면에 도시된 일실시예에 의거하여 상세하게 설명한다.Hereinafter, the oil supply structure of the linear compressor according to the present invention will be described in detail based on the embodiment shown in the accompanying drawings.

도 3은 본 발명 리니어 압축기의 일례를 파단하여 보인 측면도이고, 도 4a 및 도 4b는 도 3의 "B"부를 보인 상세도이다.Fig. 3 is a side view showing an example of the linear compressor of the present invention broken, and Figs. 4A and 4B are detailed views showing part “B” of Fig. 3.

이에 도시된 바와 같이 본 발명에 의한 오일 공급구조가 구비된 리니어 압축기는, 저면에 오일이 채워진 밀폐용기(V)에 압축 유니트(C)가 장착되고, 그 압축 유니트(C)에 결합되는 오일피더(O)가 진동에 의해 밀폐용기(V)내의 오일을 펌핑하여 상기한 압축 유니트(C)에 공급되도록 구성된다.As shown in the linear compressor having an oil supply structure according to the present invention, an oil feeder having a compression unit (C) mounted on a sealed container (V) filled with oil on a bottom surface thereof and coupled to the compression unit (C) (O) is configured to pump the oil in the sealed container (V) by vibration and to be supplied to the compression unit (C).

상기 압축 유니트(C)의 프레임(1)에 오일피더(O)의 토출측과 연통되는 오일유입유로(1a)가 형성되고, 그 오일유입유로(1a)에 연통되는 오일순환로(1b)가 압축 유니트(C)를 냉각시키도록 프레임(1)과 그 프레임(1)의 관통구멍에 삽입 고정되는 실린더(100) 그리고 그 실린더(100)를 복개하는 토출커버(4)에 의해 형성되며, 상기 오일순환로(1b)의 최상점에 오일연통로(1c)가 프레임(1)의 내측으로 연통 형성되고, 그 오일연통로(1c)의 단부에 연통되는 환형의 제1 오일포켓(1d)이 프레임(1)과 실린더(100)의 외주면 사이에 형성되며, 상기 실린더(100)의 내주면과 피스톤(3)의 외주면 사이에는 제2 오일포켓(3a)이 형성되고, 상기 제1 오일포켓(1d)과 제2 오일포켓(2a)을 연통시켜 상기한 오일순환로(1b)를 순환한 오일이 실린더(100)와 피스톤(3) 사이로 유입되도록 하는 유입측 및 유출측 오일통공(110,120)이 실린더(100)의 상,하 양측에 각각 형성되며, 상기 프레임(1)의 오일유입유로(1a) 일측에는 상기한 오일이 오일순환로(1b) 및 오일연통로(1c) 및 제1,제2 오일포켓(1d)을 차례대로 순환한 다음 밀폐용기(V)로 복귀되도록 하는 오일복귀유로(미도시)가 상기 제1 오일포켓(1b)의 하반부쪽에 연통 형성되어 이루어진다.An oil inflow passage 1a is formed in the frame 1 of the compression unit C so as to communicate with the discharge side of the oil feeder O, and an oil circulation passage 1b in communication with the oil inflow passage 1a is formed in the compression unit. The oil circulation path is formed by the frame 1, the cylinder 100 inserted into and fixed to the through hole of the frame 1, and the discharge cover 4 covering the cylinder 100 to cool (C). The oil communication path 1c is formed in communication with the inner side of the frame 1 at the uppermost point of 1b, and the annular first oil pocket 1d is connected to the end of the oil communication path 1c. ) Is formed between the outer circumferential surface of the cylinder 100 and the inner circumferential surface of the cylinder 100, and a second oil pocket 3a is formed between the inner circumferential surface of the cylinder 100 and the first oil pocket 1d and the first oil pocket 1d. 2 Inflow side and oil to communicate the oil pocket (2a) so that the oil circulated in the oil circulation path (1b) flows between the cylinder 100 and the piston (3) Outgoing oil through holes (110, 120) are formed on both sides of the cylinder 100, respectively, the oil inflow passage (1a) of the frame (1) said oil is an oil circulation path (1b) and oil communication path (1c) ) And an oil return passage (not shown) communicating with the first and second oil pockets 1d in order and then returning to the sealed container V is formed in communication with the lower half of the first oil pocket 1b. .

여기서, 상기 실린더(100)의 유입측 오일통공(110) 주위에는 오일피더(O)로부터 공급되는 오일의 일정량이 고여 상기한 유입측 오일통공(100)을 통해 실린더(100)와 피스톤(3) 사이로 유입되도록 하는 오일포집홈(130)이 형성되는데, 이 오일포집홈(130)은 실린더(100)의 외주면에 음각지게 형성되고, 그 바닥면은 유입측 오일통공(110)쪽으로 갈 수록 함몰지게 형성되는 것이 바람직하다.Here, a predetermined amount of oil supplied from the oil feeder (O) around the inlet side oil through hole 110 of the cylinder 100 is high, and the cylinder 100 and the piston 3 through the inlet side oil through hole 100. An oil collecting groove 130 is formed to be introduced therebetween, and the oil collecting groove 130 is engraved on the outer circumferential surface of the cylinder 100, and the bottom surface of the oil collecting groove 130 is recessed toward the inlet side oil through hole 110. It is preferably formed.

도면중 종래와 동일한 부분에 대하여는 동일한 부호를 부여하였다.In the drawings, the same reference numerals are given to the same parts as in the prior art.

도면중 미설명 부호인 3b는 냉매유로, 5는 토출밸브, 6은 밸브스프링, 7은 흡입밸브이다.In the drawings, reference numeral 3b denotes a refrigerant flow passage, 5 denotes a discharge valve, 6 denotes a valve spring, and 7 denotes a suction valve.

상기와 같은 본 발명에 의한 오일 공급구조가 구비된 리니어 압축기의 일반적인 동작은 종래와 동일하다.The general operation of the linear compressor provided with the oil supply structure according to the present invention as described above is the same as in the prior art.

즉, 상기 리니어 모터(미부호)의 고정자에 전류가 인가되어 가동자가 직선 왕복운동을 하게 되면, 그 가동자에 결합된 피스톤(3)이 실린더(100)내를 왕복운동하게 되고, 그 피스톤(3)이 실린더(100)내를 왕복운동함에 따라 밀폐용기(V)내로 유입된 냉매가스가 실린더(100)로 흡입되어 압축된 이후에 토출커버(4) 및 토출파이프(미도시) 그리고 루프파이프(미도시)를 차례대로 거쳐 외부로 토출되는 일련의 과정을 반복하게 된다.That is, when a current is applied to the stator of the linear motor (unsigned) and the mover linearly reciprocates, the piston 3 coupled to the mover reciprocates in the cylinder 100, and the piston ( 3) As the cylinder reciprocates in the cylinder 100, the refrigerant gas introduced into the sealed container V is sucked into the cylinder 100 and compressed, and then the discharge cover 4, the discharge pipe (not shown), and the loop pipe. A series of processes that are discharged to the outside through the (not shown) in sequence is repeated.

여기서, 상기 프레임(1)의 하부에 결합된 오일피더(O)가 피스톤(3)의 왕복운동에 의한 진동으로 함께 유동을 하게 되어 밀폐용기(V)의 오일을 펌핑하게 되고, 그 펌핑된 오일은 오일유입유로(1a)를 통해 오일순환로(1b)로 유입되어 실린더(100) 및 리니어 모터에 발생된 열을 냉각시키면서 순환되고 난 다음에, 상기 오일연통로(1c)를 통해 제1 오일포켓(1d)로 유입되며, 그 제1 오일포켓(1d)에서 유입측 오일통공(110)을 통해 제2 오일포켓(3a)으로 유입되어 실린더(100)와 피스톤(3) 사이의 미끄럼부를 윤활시킨 이후에 다시 제1 오일포켓(1b) 및 오일복귀유로(미도시)를 통해 밀폐용기(V)로 복귀하게 된다.Here, the oil feeder (O) coupled to the lower portion of the frame (1) is flowed together by the vibration by the reciprocating motion of the piston (3) to pump the oil of the sealed container (V), the pumped oil The silver is introduced into the oil circulation passage 1b through the oil inflow passage 1a and circulated while cooling the heat generated in the cylinder 100 and the linear motor, and then the first oil pocket through the oil communication passage 1c. (1d) is introduced into the second oil pocket (3a) through the inlet side oil through hole 110 in the first oil pocket (1d) to lubricate the sliding portion between the cylinder 100 and the piston (3) Afterwards, the oil container 1 is returned to the sealed container V through the first oil pocket 1b and the oil return passage (not shown).

이때, 상기 오일연통로(1c)의 단부로부터 제1 오일포켓(1d)으로 유입되는 오일은 실린더(100)의 외주면에 형성되는 오일포집홈(130)에 고이게 되고, 그 오일포집홈(130)에 고인 오일은 상기 유입측 오일통공(110)쪽으로 흘러들어 피스톤(3)의 제2 오일포켓(3a)에 유입된다.At this time, the oil flowing into the first oil pocket (1d) from the end of the oil communication path (1c) is accumulated in the oil collecting groove 130 formed on the outer peripheral surface of the cylinder 100, the oil collecting groove 130 The accumulated oil flows into the inflow side oil through hole 110 and flows into the second oil pocket 3a of the piston 3.

이렇게 하여, 상기 압축기의 기동시, 특히 압축기의 재기동시는 상기한 오일연통로(1c)로부터 제1 오일포켓(1d)으로 유입되는 오일의 양이 미미하나, 그 미미한 양의 오일이더라도 상기한 오일포집홈(130)에 모여 실린더(100)와 피스톤(3) 사이로 공급되므로, 압축기의 오일 부족으로 인한 실린더(100) 및 피스톤(3)의 마멸 등이 미연에 방지되는 것이다.In this way, when the compressor is started, in particular, when the compressor is restarted, the amount of oil flowing from the oil communication path 1c into the first oil pocket 1d is small, but the oil is collected even if the oil is insignificant. Gathered in the groove 130 and supplied between the cylinder 100 and the piston 3, the wear of the cylinder 100 and the piston 3 due to the lack of oil in the compressor is to be prevented in advance.

이상에서 설명한 바와 같이 본 발명에 의한 리니어 압축기의 오일 공급구조는, 압축 유니트를 냉각시킨 오일이 그 압축 유니트의 실린더와 피스톤 사이로 유입되도록 하는 유입측 오일통공의 주위에 오일포집홈을 형성하여 오일피더로부터 공급되는 오일이 상기한 오일포집홈에 고여 실린더와 피스톤 사이로 유입되도록 함으로써, 상기 오일유입유로 및 오일순환로 그리고 오일연통로를 통해 제1 오일포켓으로 유입되는 오일이 제2 오일포켓으로 원활하게 유입되도록 하여 상기한 실린더와 피스톤 사이의 미끄럼부에서 오일 부족 현상이 발생되지 않게 된다.As described above, in the oil supply structure of the linear compressor according to the present invention, an oil feeder is formed by forming an oil collecting groove around an inlet side oil through-hole which allows oil, which has cooled the compression unit, to flow between the cylinder and the piston of the compression unit. The oil supplied from the oil is collected in the oil collecting groove and flows between the cylinder and the piston, so that the oil flowing into the first oil pocket through the oil inflow passage, the oil circulation passage and the oil communication passage flows smoothly into the second oil pocket. The oil shortage phenomenon does not occur at the sliding portion between the cylinder and the piston.

Claims (2)

오일피더로부터 공급되는 오일이 압축 유니트의 실린더와 피스톤 사이로 유입되었다가 다시 밀폐용기로 복귀되도록 실린더에 유입측 오일통공 및 유출측 오일통공이 각각 구비되어 이루어지는 리니어 압축기의 오일 공급구조에 있어서,In the oil supply structure of the linear compressor in which the inlet oil through hole and the outlet side oil through hole are respectively provided in the cylinder so that oil supplied from the oil feeder flows between the cylinder and the piston of the compression unit and then returns to the sealed container, 상기 유입측 오일통공의 주위에 오일포집홈이 형성되어 오일피더로부터 공급되는 오일이 상기한 오일포집홈에 고여 실린더와 피스톤 사이로 유입되도록 하는 것을 특징으로 하는 리니어 압축기의 오일 공급구조.The oil supply structure of the linear compressor, characterized in that the oil collecting groove is formed around the inlet side oil through hole so that the oil supplied from the oil feeder is collected in the oil collecting groove and flows between the cylinder and the piston. 제1항에 있어서, 상기 오일포집홈은 실린더의 외주면에 음각지게 형성되고, 그 바닥면은 오일통공쪽으로 갈 수록 함몰지게 형성되는 것을 특징으로 하는 리니어 압축기의 오일 공급구조.The oil supply structure of claim 1, wherein the oil collecting groove is engraved on the outer circumferential surface of the cylinder, and the bottom surface of the oil collecting groove is recessed toward the oil through hole.
KR1019980053256A 1998-12-05 1998-12-05 Structure for supplying oil of linear compressor KR100292512B1 (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104110360A (en) * 2013-04-22 2014-10-22 海尔集团公司 Linear compressor and lubricating method thereof
CN104153962A (en) * 2013-05-14 2014-11-19 海尔集团公司 Oil supply device and linear compressor comprising same
CN104251198A (en) * 2013-06-25 2014-12-31 海尔集团公司 Lubricating structure for linear compressor
CN106368927A (en) * 2016-11-14 2017-02-01 青岛万宝压缩机有限公司 Lubrication structure for linear compressor and linear compressor

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104110360A (en) * 2013-04-22 2014-10-22 海尔集团公司 Linear compressor and lubricating method thereof
CN104153962A (en) * 2013-05-14 2014-11-19 海尔集团公司 Oil supply device and linear compressor comprising same
CN104251198A (en) * 2013-06-25 2014-12-31 海尔集团公司 Lubricating structure for linear compressor
CN106368927A (en) * 2016-11-14 2017-02-01 青岛万宝压缩机有限公司 Lubrication structure for linear compressor and linear compressor
CN106368927B (en) * 2016-11-14 2018-06-12 青岛万宝压缩机有限公司 Linear compressor lubrication system and linear compressor

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