KR100780785B1 - Variable capacity rotary compressor - Google Patents

Variable capacity rotary compressor Download PDF

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Publication number
KR100780785B1
KR100780785B1 KR1020050085272A KR20050085272A KR100780785B1 KR 100780785 B1 KR100780785 B1 KR 100780785B1 KR 1020050085272 A KR1020050085272 A KR 1020050085272A KR 20050085272 A KR20050085272 A KR 20050085272A KR 100780785 B1 KR100780785 B1 KR 100780785B1
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South Korea
Prior art keywords
vane
compression chamber
compression
sealed container
roller
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KR1020050085272A
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Korean (ko)
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KR20070030538A (en
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이정배
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삼성전자주식회사
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Priority to KR1020050085272A priority Critical patent/KR100780785B1/en
Priority to JP2005352537A priority patent/JP4220514B2/en
Priority to CNB200510132906XA priority patent/CN100476212C/en
Publication of KR20070030538A publication Critical patent/KR20070030538A/en
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Publication of KR100780785B1 publication Critical patent/KR100780785B1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C28/00—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids
    • F04C28/18—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids characterised by varying the volume of the working chamber
    • F04C28/22—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids characterised by varying the volume of the working chamber by changing the eccentricity between cooperating members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/30—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
    • F04C18/34—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members
    • F04C18/356—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the outer member
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C28/00—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids
    • F04C28/24—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids characterised by using valves controlling pressure or flow rate, e.g. discharge valves or unloading valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/12—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
    • F04C29/124—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet with inlet and outlet valves specially adapted for rotary or oscillating piston pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F1/00—Springs
    • F16F1/02—Springs made of steel or other material having low internal friction; Wound, torsion, leaf, cup, ring or the like springs, the material of the spring not being relevant
    • F16F1/04—Wound springs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2210/00—Fluid
    • F04C2210/26—Refrigerants with particular properties, e.g. HFC-134a
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2240/00—Components
    • F04C2240/40—Electric motor
    • 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
    • Y10S415/00—Rotary kinetic fluid motors or pumps
    • 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

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)

Abstract

공회전이 이루질 때 압축실 내부의 압력과 밀폐용기 내부의 압력이 같아지도록 함으로써 압축실로 오일이 유입되는 현상을 방지하여 회전저항을 최소화할 수 있도록 한 용량가변 회전압축기를 개시한다. 이 용량가변 회전압축기는 밀폐용기와, 밀폐용기 내에 설치되는 구동모터 및 압축기구를 포함하고, 압축기구는 압축실을 갖춘 하우징과, 압축실 내에서 회전하는 롤러와, 롤러의 반경방향으로 진퇴하면서 압축실을 구획하며 상호 슬라이딩 가능하게 지지된 제1베인 및 제2베인과, 압축용량 제어를 위해 제1베인을 구속하거나 구속 해제하는 베인제어장치를 포함하며, 제1베인이 후퇴하여 구속될 때 밀폐용기 내부와 압축실이 연통하도록 제1베인의 운동경로에 마련된 연통공을 포함한다.The present invention discloses a capacity-variable rotary compressor that minimizes the rolling resistance by preventing oil from flowing into the compression chamber by making the pressure inside the compression chamber equal to the pressure inside the sealed container when the idling is performed. The variable displacement rotary compressor includes a hermetically sealed container, a drive motor and a compression mechanism installed in the hermetically sealed container. The compression mechanism includes a housing having a compression chamber, a roller that rotates in the compression chamber, and a roller retracting in the radial direction. A first vane and a second vane partitioning the compression chamber and slidably supported therebetween; and a vane control device for restraining or releasing the first vane to control the compression capacity, and when the first vane is retracted and restrained, It includes a communication hole provided in the motion path of the first vane so that the interior of the sealed container and the compression chamber communicates.

Description

용량가변 회전압축기{VARIABLE CAPACITY ROTARY COMPRESSOR}VARIABLE CAPACITY ROTARY COMPRESSOR}

도 1은 본 발명에 따른 용량가변 회전압축기의 구성을 나타낸 단면도로, 압축동작이 이루어지는 상태를 도시한 것이다.1 is a cross-sectional view showing a configuration of a capacity variable rotary compressor according to the present invention, showing a state in which a compression operation is performed.

도 2는 본 발명에 따른 용량가변 회전압축기의 구성을 나타낸 단면도로, 공회전동작이 이루어지는 상태를 도시한 것이다.Figure 2 is a cross-sectional view showing the configuration of the variable displacement rotary compressor according to the present invention, showing a state in which the idle operation is performed.

도 3은 도 3의 Ⅲ-Ⅲ'선에 따른 단면도이다.3 is a cross-sectional view taken along line III-III ′ of FIG. 3.

도 4는 본 발명에 따른 용량가변 회전압축기의 상부플랜지 구성을 나타낸 사시도이다.Figure 4 is a perspective view showing the configuration of the upper flange of the variable displacement rotary compressor according to the present invention.

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

10: 밀폐용기, 20: 구동모터,10: sealed container, 20: drive motor,

21: 회전축, 30: 압축기구,21: rotating shaft, 30: compression mechanism,

32: 압축실, 40: 압축장치,32: compression chamber, 40: compression device,

41: 편심부, 42: 롤러,41: eccentric, 42: roller,

43: 제1베인, 44: 제2베인,43: first vane, 44: second vane,

45: 베인스프링, 51: 흡입구,45: vanes spring, 51: inlet,

52: 토출구, 54: 연통공,52: discharge port, 54: communication hole,

60: 베인제어장치, 61: 실린더,60: vane control, 61: cylinder,

62: 피스톤, 63: 스프링,62: piston, 63: spring,

67: 유로가변밸브.67: flow path variable valve.

본 발명은 용량가변 회전압축기에 관한 것으로, 더욱 상세하게는 베인의 진퇴동작 제어를 통해 압축용량을 가변시킬 수 있는 용량가변 회전압축기에 관한 것이다.The present invention relates to a variable displacement rotary compressor, and more particularly to a variable displacement rotary compressor that can vary the compression capacity through the control of the vane forward and backward movement.

대한민국 공개특허공보 10-2004-0021140호에는 베인의 진퇴동작 제어에 의해 압축용량을 가변시키는 용량가변 회전압축기가 개시되어 있다. 이 회전압축기는 원통형의 압축실이 형성된 하우징, 하우징의 압축실 내에서 편심 회전하는 롤러, 롤러의 반경방향으로 진퇴하는 베인을 구비한다. 베인은 상호 분리된 상부의 제1베인과 하부의 제2베인으로 이루어져 있고, 제1베인 쪽에는 필요에 따라 제1베인을 롤러의 외면으로 이격시킬 수 있도록 제1베인을 구속하는 구속수단이 설치되어 있다. Korean Unexamined Patent Publication No. 10-2004-0021140 discloses a variable displacement rotary compressor for varying the compression capacity by controlling the vane movement. The rotary compressor has a housing in which a cylindrical compression chamber is formed, a roller which eccentrically rotates in the compression chamber of the housing, and vanes which retract in the radial direction of the roller. The vane is composed of a first vane of the upper and second vanes separated from each other, the first vane side is provided with a restraining means for restraining the first vane so as to space the first vane to the outer surface of the roller, if necessary It is.

이 회전압축기는 구속수단에 의해 제1베인이 구속될 때 공회전을 하고 구속수단에 의해 제1베인이 구속되지 않을 때 압축동작을 수행한다. 따라서 필요에 따라 제1베인을 구속하거나 구속 해제하는 것을 통해 압축용량을 가변시킬 수 있다.The rotary compressor performs idling when the first vane is restrained by the restraining means and performs a compression operation when the first vane is not restrained by the restraining means. Therefore, the compression capacity can be varied by restraining or releasing the first vane as necessary.

그러나 이 회전압축기는 제1베인의 구속에 의해 압축실에서 공회전이 이루어질 때 밀폐용기 내부의 압력보다 압축실 내부의 압력이 낮아지기 때문에 밀폐용기의 하부에 채워진 오일이 압축실 내부로 유입되는 현상이 있었다. 그리고 압축실에 오일이 유입될 경우에는 롤러의 회전저항이 커지기 때문에 압축기의 효율이 낮아질 수 있었다.However, when the rotary compressor is idling in the compression chamber due to the restriction of the first vane, the pressure inside the compression chamber is lower than the pressure inside the sealed container, so that the oil filled in the lower part of the sealed container flows into the compression chamber. . In addition, when oil is introduced into the compression chamber, the rotational resistance of the roller may be increased, thereby reducing the efficiency of the compressor.

본 발명은 이러한 문제점들을 해결하기 위한 것으로, 본 발명의 목적은 공회전이 이루질 때 압축실 내부의 압력과 밀폐용기 내부의 압력이 같아지도록 함으로써 압축실로 오일이 유입되는 현상을 방지하고 베인의 전단과 후단에 작용하는 압력이 같아지도록 하여 회전저항을 최소화할 수 있도록 하는 용량가변 회전압축기를 제공하는 것이다.The present invention is to solve these problems, an object of the present invention is to prevent the flow of oil into the compression chamber by the pressure inside the compression chamber and the pressure inside the sealed container when the idling is made, and the front end of the vane and It is to provide a variable displacement rotary compressor to minimize the rolling resistance by the same pressure applied to the rear end.

이러한 목적을 달성하기 위한 본 발명에 따른 용량가변 회전압축기는 밀폐용기와, 상기 밀폐용기 내에 설치되는 구동모터 및 압축기구를 포함하고, 상기 압축기구는 압축실을 갖춘 하우징과, 상기 압축실 내에서 회전하는 롤러와, 상기 롤러의 반경방향으로 진퇴하면서 상기 압축실을 구획하며 상호 슬라이딩 가능하게 지지된 제1베인 및 제2베인과, 압축용량 제어를 위해 상기 제1베인을 구속하거나 구속 해제하는 베인제어장치를 포함하며, 상기 제1베인이 후퇴하여 구속될 때 상기 밀폐용기 내부와 상기 압축실이 연통하도록 상기 제1베인의 운동경로에 마련된 연통공을 포함하는 것을 특징으로 한다.A variable capacity rotary compressor according to the present invention for achieving this object includes a hermetically sealed container, a drive motor and a compression mechanism installed in the hermetically sealed container, the compression mechanism includes a housing having a compression chamber, and within the compression chamber. A rotating roller, a first vane and a second vane which are slidably supported while partitioning the compression chamber while advancing in the radial direction of the roller, and a vane that restrains or releases the first vane for compression capacity control; It includes a control device, characterized in that it comprises a communication hole provided in the movement path of the first vane so that the inside of the sealed container and the compression chamber communicates when the first vane is retracted and restrained.

또한 상기 하우징은 중앙에 상기 압축실이 형성된 바디와, 상기 압축실의 상부 및 하부를 폐쇄하도록 상기 바디의 상부와 하부에 각각 결합된 상부 및 하부플랜지를 포함하며, 상기 연통공은 상기 제1베인의 운동경로 쪽 상기 상부플랜지에 형성된 것을 특징으로 한다.In addition, the housing includes a body having the compression chamber formed in the center, and an upper and a lower flange coupled to the upper and lower portions of the body so as to close the upper and lower portions of the compression chamber, and the communication hole is the first vane. The movement path of the side is characterized in that formed on the upper flange.

또한 상기 베인제어장치는 상기 제1베인 쪽의 상기 하우징에 설치된 실린더와, 상기 실린더 내에 진퇴 가능하게 설치되며 상기 제1베인과 연결된 피스톤과, 상기 실린더 내부와 연통된 제1유로와, 상기 압축기의 토출측과 상기 제1유로를 연결하는 제2유로와, 상기 압축기의 흡입측과 상기 제1유로를 연결하는 제3유로와, 상기 제1, 제2, 제3유로가 상호 연결되는 지점에 설치된 유로가변밸브를 포함하는 것을 특징으로 한다.The vane control device may further include a cylinder installed in the housing on the first vane side, a piston installed in the cylinder to be retractable and connected to the first vane, a first flow path communicating with the inside of the cylinder, and A second passage connecting the discharge side and the first passage, a third passage connecting the suction side of the compressor and the first passage, and a passage provided at a point where the first, second, and third passages are interconnected. It characterized in that it comprises a variable valve.

또한 상기 베인제어장치는 상기 피스톤을 상기 롤러 쪽으로 가압하도록 상기 실린더 내에 설치된 스프링을 포함하는 것을 특징으로 한다.In addition, the vane control device is characterized in that it comprises a spring installed in the cylinder to press the piston towards the roller.

이하에서는 본 발명에 따른 바람직한 실시 예를 첨부도면을 참조하여 상세히 설명한다.Hereinafter, with reference to the accompanying drawings a preferred embodiment according to the present invention will be described in detail.

본 발명에 따른 용량가변 회전압축기는 도 1에 도시한 바와 같이, 밀폐용기(10)의 내측 상부에 설치된 구동모터(20)와, 밀폐용기(10)의 내측 하부에 설치되며 구동모터(20)와 회전축(21)을 통해 연결된 압축기구(30)를 구비한다. The variable displacement rotary compressor according to the present invention, as shown in Figure 1, the drive motor 20 is installed on the inner upper portion of the sealed container 10, the drive motor 20 is installed on the inner lower portion of the sealed container 10 And a compression mechanism (30) connected through the rotating shaft (21).

구동모터(20)는 밀폐용기(10)의 내면에 고정되는 원통형의 고정자(22), 고정자(22)의 내부에 회전 가능하게 설치되며 중심부가 회전축(21)과 결합된 회전자(23)를 포함한다. 이러한 구동모터(20)는 회전축(21)을 회전시킴으로써 압축기구(30)를 구동시킨다.The drive motor 20 is a cylindrical stator 22 fixed to the inner surface of the sealed container 10, rotatably installed inside the stator 22 and the center of the rotor 23 coupled to the rotating shaft 21 Include. The drive motor 20 drives the compression mechanism (30) by rotating the rotary shaft (21).

압축기구(30)는 도 1과 도 3에 도시한 바와 같이, 압축실(32)을 형성하는 하우징과, 압축실(32) 내에 마련된 압축장치(40)을 구비한다.The compression mechanism 30 is provided with the housing which forms the compression chamber 32, and the compression apparatus 40 provided in the compression chamber 32, as shown in FIG.

하우징은 원통형의 압축실(32)이 형성된 바디(31), 압축실(32)의 상측 개구와 하측 개구를 폐쇄함과 동시에 회전축(21)을 지지하도록 바디(31)의 상부와 하부에 각각 장착된 제1 및 제2플랜지(33,34)를 포함한다. 회전축(21)은 압축실(32) 내부의 압축장치(40)를 동작시킬 수 있도록 압축실(32)의 중심을 관통한다.The housing is mounted on the upper and lower portions of the body 31 so as to support the rotating shaft 21 while closing the upper and lower openings of the body 31 and the compression chamber 32 having the cylindrical compression chamber 32 formed therein. First and second flanges 33 and 34. The rotating shaft 21 penetrates the center of the compression chamber 32 to operate the compression device 40 inside the compression chamber 32.

압축장치(40)는 압축실(32)의 회전축(21) 외면에 마련된 편심부(41)와, 압축실(32)의 내면과 접하여 회전하도록 편심부(41)의 외면에 회전 가능하게 결합된 롤러(42)를 포함한다. 또 압축장치(40)는 롤러(42)의 회전에 따라 압축실(32)의 반경방향으로 진퇴하면서 압축실(32)을 구획하며 상호 접하는 면이 슬라이딩 가능하게 지지된 제1베인(43) 및 제2베인(44)을 포함한다. 따라서 압축실(32)은 상대적으로 폭이 큰 작은 상부의 제1베인(43)과 상대적으로 폭이 큰 하부의 제2베인(44)에 의하여 구획된다. 또한 제2베인(44)은 롤러(42)가 회전할 때 진퇴할 수 있도록 후단이 베인스프링(45)에 의해 지지된다. 그리고 제1베인(43)은 제1베인(43)을 구속하거나 구속 해제함으로써 압축용량을 가변시킬 수 있도록 베인제어장치(60)와 연결된다.The compression device 40 is rotatably coupled to the eccentric portion 41 provided on the outer surface of the rotary shaft 21 of the compression chamber 32 and the outer surface of the eccentric portion 41 so as to rotate in contact with the inner surface of the compression chamber 32. Roller 42. In addition, the compression device 40 partitions the compression chamber 32 while advancing in the radial direction of the compression chamber 32 according to the rotation of the roller 42, and the first vanes 43 with which the mutually contacting surfaces are slidably supported; The second vane 44 is included. Therefore, the compression chamber 32 is divided by the first vane 43 of a relatively small width and the second vane 44 of a relatively large width. Also, the second vane 44 is supported by the vane spring 45 so that the second vane 44 can move forward and backward when the roller 42 rotates. In addition, the first vane 43 is connected to the vane control device 60 to vary the compression capacity by restraining or restraining the first vane 43.

베인제어장치(60)는 도 1과 도 3에 도시한 바와 같이, 제1베인(43)의 후단 쪽에 설치된 실린더(61)와, 제1베인(43)의 진퇴방향으로 진퇴하도록 실린더(61)의 내에 설치되며 제1베인(43)의 후단과 연결된 피스톤(62), 평소 피스톤(62)을 롤러(42) 쪽으로 가압하도록 실린더(61) 내에 설치된 스프링(63)을 포함한다. 스프링(63)은 피스톤(62)을 가압함으로써 제1베인(43) 선단이 롤러(42)의 외면에 접촉할 수 있도록 한 것으로 베인스프링(45)보다는 약한 탄성을 구비한다.As shown in FIGS. 1 and 3, the vane control device 60 includes a cylinder 61 provided at the rear end side of the first vane 43 and a cylinder 61 to retreat in the advancing direction of the first vane 43. Piston 62 is installed in the interior of the first vane 43 is connected to the rear end, and the usual piston 62 to the roller 42 to include a spring 63 installed in the cylinder (61). The spring 63 allows the tip of the first vane 43 to come into contact with the outer surface of the roller 42 by pressing the piston 62 and has a weaker elasticity than the vane spring 45.

또 베인제어장치(60)는 실린더(61)의 내부와 연통하는 제1유로(64)를 형성하도록 실린더(61)의 후단에 연결된 제1압력조절관(64a)과, 압축기의 토출측과 제1유로(64)를 연통시키는 제2유로(65)를 형성하도록 토출배관(12)으로부터 분기되며 제1압력조절관(64a)에 연결되는 제2압력조절관(65a)과, 압축기의 흡입측과 제1유로(64)를 연통시키는 제3유로(66)를 형성하도록 냉매흡입배관(14)으로부터 연장되며 제1압력조절관(64a)에 연결되는 제3압력조절관(66a)과, 제1, 제2, 제3압력조절관(64a,65a,66a)이 연결되는 지점에 설치된 유로가변밸브(67)를 포함한다. 유로가변밸브(67)는 전기적인 제어신호에 의해 동작하는 통상의 삼방밸브로 이루어질 수 있다.The vane control device 60 further includes a first pressure control pipe 64a connected to the rear end of the cylinder 61 so as to form a first flow path 64 communicating with the inside of the cylinder 61, the discharge side of the compressor and the first one. A second pressure control pipe 65a branched from the discharge pipe 12 and connected to the first pressure control pipe 64a to form a second flow path 65 for communicating the flow path 64, and a suction side of the compressor; A third pressure regulating tube 66a extending from the refrigerant suction pipe 14 and connected to the first pressure regulating tube 64a to form a third passage 66 communicating with the first passage 64; And a flow path variable valve 67 installed at a point at which the second and third pressure control pipes 64a, 65a, and 66a are connected. The flow path variable valve 67 may be formed of a conventional three-way valve operated by an electric control signal.

이러한 베인제어장치(60)는 도 1에 도시한 바와 같이, 유로가변밸브(67)의 동작에 의해 실린더(61) 내부가 압축기의 토출측과 연통될 때 피스톤(62)이 토출압력에 의해 가압됨으로써 제1베인(43)이 롤러(42)의 외면과 접한 상태에서 진퇴할 수 있도록 한 것이다. 따라서 이때는 압축동작이 이루어진다. 그리고 도 2에 도시한 바와 같이, 유로가변밸브(67)의 동작에 의해 실린더(61) 내부가 압축기의 흡입측과 연통될 때 피스톤(62)이 흡입압력에 의해 후퇴함으로써 제1베인(43)이 롤러(42)의 외면과 이격된 상태에서 구속될 수 있도록 한 것이다. 따라서 이때는 공회전을 한다.As shown in FIG. 1, the vane control device 60 is pressurized by the discharge pressure when the inside of the cylinder 61 communicates with the discharge side of the compressor by the operation of the flow path variable valve 67. The first vane 43 is to be moved back and forth in contact with the outer surface of the roller 42. Therefore, the compression operation is performed at this time. As shown in FIG. 2, when the inside of the cylinder 61 communicates with the suction side of the compressor by the operation of the flow path variable valve 67, the piston 62 retreats by the suction pressure, thereby causing the first vane 43 to be retracted. It is to be restrained in a state spaced apart from the outer surface of the roller 42. Therefore, idling at this time.

또 바디(31)에는 도 3에 도시한 바와 같이, 압축실(32) 내부로 가스가 유입되는 흡입구(51)가 형성되고, 이 흡입구(51)에는 어큐뮬레이터(13)로부터 연장된 냉매흡입배관(14)이 연결된다. 그리고 상부의 제1플랜지(33)에는 압축실(32)에서 가압된 가스의 토출을 위해 토출구(52)가 형성되고, 토출구(52) 상측에는 리드형 토출밸브(53)가 설치된다(도 4참조). 따라서 압축기가 가동될 때 밀폐용기(10) 내부는 토출구(52)를 통해 배출되는 압축가스에 의해 고압으로 유지되고, 밀폐용기(10) 내부의 압축가스는 밀폐용기(10) 상부에 마련된 토출배관(12)을 통해 외부로 안내된다.In addition, as shown in FIG. 3, a body 31 has a suction port 51 through which gas is introduced into the compression chamber 32, and a refrigerant suction pipe extending from the accumulator 13 is formed in the suction port 51. 14) is connected. In the upper first flange 33, a discharge port 52 is formed to discharge the gas pressurized by the compression chamber 32, and a lead type discharge valve 53 is provided above the discharge port 52 (FIG. 4). Reference). Therefore, when the compressor is operated, the inside of the hermetic container 10 is maintained at a high pressure by the compressed gas discharged through the discharge port 52, and the compressed gas in the hermetic container 10 is discharged to the upper portion of the hermetic container 10. Guided out through 12.

또한 본 발명은 도 2에 도시한 바와 같이, 베인제어장치(60)의 동작에 의해 제1베인(43)이 후퇴한 상태에서 구속될 때 압축기구(30) 외측의 밀폐용기(10) 내부 압력과 압축실(32)의 압력이 같아질 수 있도록 하는 연통공(54)을 구비한다. 이 연통공(54)은 도 2와 도 4에 도시한 바와 같이, 제1베인(43)의 운동경로 상의 상부플랜지(33)에 형성되며 제1베인(43)이 후퇴할 때 밀폐용기(10) 내부와 압축실(32)이 연통하도록 한다. 즉 도 1에 도시한 바와 같이 제1베인(43)의 구속이 해제될 때는 연통공(54)이 제1베인(43)에 의해 폐쇄되고, 도 2에 도시한 바와 같이, 제1베인(43)이 구속될 때는 제1베인(43)의 선단이 연통공(54)의 위치보다 후방으로 후퇴하므로 연통공(54)이 개방된다.In addition, the present invention, as shown in Figure 2, when the first vane 43 is restrained in the retracted state by the operation of the vane control device 60, the pressure inside the sealed container 10 outside the compression mechanism (30) And a communication hole 54 such that the pressure of the compression chamber 32 can be equal. 2 and 4, the communication hole 54 is formed in the upper flange 33 on the movement path of the first vane 43 and the sealed container 10 when the first vane 43 retreats. ) And the compression chamber 32 to communicate with each other. That is, as shown in FIG. 1, when the restraint of the first vane 43 is released, the communication hole 54 is closed by the first vane 43, and as shown in FIG. 2, the first vane 43. ), The front end of the first vane 43 is retracted to the rear of the position of the communication hole 54, so that the communication hole 54 is opened.

이는 제1베인(43)의 구속에 의해 공회전이 이루어질 때 압축실(32) 내부와 압축기구(30) 외측의 밀폐용기(10) 내부가 연통공(54)을 통해 연통됨으로써 압축실(32)과 밀폐용기(10)의 압력이 같아지도록 한 것이다. 따라서 본 발명은 공회전을 하는 동안 압축실(32) 내부와 밀폐용기(10)의 내부압력이 같기 때문에 압축실(32) 내부로 오일이 유입되지 않고 베인들(43,44)의 선단과 후단에 작용하는 압력도 같아지게 된다. 따라서 공회전을 할 때 회전저항이 작아진다.This is because the compression chamber 32 is communicated through the communication hole 54 inside the compression chamber 32 and the inside of the sealed container 10 outside the compression mechanism 30 when the idling is made by the restraint of the first vane 43. The pressure of the sealed container 10 is to be equal. Therefore, in the present invention, since the internal pressure of the compression chamber 32 and the airtight container 10 are the same during idling, oil does not flow into the compression chamber 32 and is at the front and rear ends of the vanes 43 and 44. The working pressure will be the same. Therefore, when idling, rolling resistance becomes small.

다음은 이러한 용량가변 회전압축기의 전체적인 동작에 관하여 설명한다.The following describes the overall operation of this variable displacement rotary compressor.

도 1에 도시한 바와 같이, 유로가변밸브(67)의 동작에 의해 제2유로(65)가 제1유로(64)와 연통된 상태에서 압축기의 동작이 이루어지면, 베인제어장치(60)의 실린더(61) 내에 토출 측의 압력이 작용하므로 피스톤(62)이 제1베인(43)을 가압한다. 따라서 제1베인(43)은 롤러(42)의 회전에 따라 롤러(42)의 외면과 접한 상태로 진퇴한다. 또 제2베인(44)은 베인스프링(45)에 의해 가압되므로 제1베인(43)과 함께 진퇴하면서 압축실(32)을 구획한다. 따라서 이때는 압축동작이 이루어진다.As shown in FIG. 1, when the operation of the compressor is performed while the second flow path 65 is in communication with the first flow path 64 by the operation of the flow path variable valve 67, the vane control device 60 is operated. Since the pressure on the discharge side acts in the cylinder 61, the piston 62 presses the first vane 43. Therefore, the first vane 43 advances and retreats in contact with the outer surface of the roller 42 as the roller 42 rotates. In addition, since the second vane 44 is pressed by the vane spring 45, the compression chamber 32 is partitioned while advancing and retreating together with the first vane 43. Therefore, the compression operation is performed at this time.

이러한 압축동작의 초기에는 토출압력이 생기지 않은 상태이므로 피스톤(62)이 실린더(61) 내부의 스프링(63)에 의해 가압됨으로써 제1베인(43)이 롤러(42) 외면에 접한다. 그리고 수회 동작하여 토출압력이 생긴 후에는 피스톤(62)이 토출압력에 의해 가압된다. In the initial stage of the compression operation, since the discharge pressure is not generated, the piston 62 is pressed by the spring 63 inside the cylinder 61 so that the first vane 43 is in contact with the outer surface of the roller 42. After the operation is performed several times to generate the discharge pressure, the piston 62 is pressurized by the discharge pressure.

도 2에 도시한 바와 같이, 유로가변밸브(67)의 동작에 의해 제3유로(66)가 제1유로(64)와 연통된 상태에서 압축기의 동작이 이루어지면, 베인제어장치(60)의 실린더(61) 내에 흡입측의 압력이 작용하므로 피스톤(62)이 스프링(63)의 탄성력을 이기고 후퇴하고, 피스톤(62)의 후퇴에 의해 제1베인(43)의 선단이 롤러(42)의 외면으로부터 이격된 상태를 유지한다. 따라서 이때는 공회전이 이루어진다. As shown in FIG. 2, when the operation of the compressor is performed while the third flow path 66 is in communication with the first flow path 64 by the operation of the flow path variable valve 67, the vane control device 60 is operated. Since the pressure on the suction side acts on the cylinder 61, the piston 62 retreats from the elastic force of the spring 63, and the tip of the first vane 43 is retracted by the retraction of the piston 62. It is kept away from the outer surface. Therefore, idling occurs at this time.

또 공회전이 이루어질 때는 도 2에 도시한 바와 같이, 연통공(54)을 통해 밀폐용기(10)의 내부와 압축실(32)이 연통되므로 압축실(32) 내부의 압력과 밀폐용기(10) 내부의 압력이 같아진다. 따라서 압축실(32) 내부로 오일이 유입되지 않을 뿐 아니라 베인들(43,44)의 선단과 후단에 작용하는 압력이 같으므로 회전축(21)은 회 전저항 없이 쉽게 회전한다. 이는 압축기의 효율향상에 기여한다.In addition, when idling is performed, as shown in FIG. 2, since the inside of the sealed container 10 and the compression chamber 32 communicate with each other through the communication hole 54, the pressure inside the compression chamber 32 and the sealed container 10 are reduced. The pressure inside is equal. Therefore, not only oil does not flow into the compression chamber 32, but also the pressure acting on the front and rear ends of the vanes 43 and 44 is the same, so that the rotation shaft 21 easily rotates without rotation resistance. This contributes to the improved efficiency of the compressor.

또 본 발명은 베인제어장치(60)의 동작사이클을 제어함으로써 압축용량을 다양하게 가변시킬 수 있다. 즉 베인제어장치(60)의 동작에 의해 압축동작과 공회전동작이 반복되도록 함으로써 압축용량을 가변시킬 수 있다. In addition, the present invention can vary the compression capacity by controlling the operation cycle of the vane control device (60). That is, the compression capacity can be varied by repeating the compression operation and the idling operation by the operation of the vane control device 60.

이상에서 상세히 설명한 바와 같이, 본 발명에 따른 용량가변 회전압축기는 제1베인이 후퇴하여 공회전이 이루질 때 압축실 내부와 밀폐용기 내부가 연통공을 통해 연통되기 때문에 압축실 내부의 압력과 밀폐용기 내부의 압력이 같아지고, 베인들의 선단과 후단에 작용하는 압력이 같아진다. 따라서 본 발명은 공회전이 이루어질 때 압축실로 오일이 유입되는 현상을 방지할 수 있고 회전저항을 최소화할 수 있는 효과가 있다.As described above in detail, the capacity-variable rotary compressor according to the present invention has a pressure and a sealed container inside the compression chamber because the interior of the compression chamber and the sealed container communicate through the communication hole when the first vane is retracted to achieve idle rotation. The internal pressure is the same, and the pressures acting on the front and rear of the vanes are equal. Therefore, the present invention can prevent the flow of oil into the compression chamber when the idling is made and there is an effect that can minimize the rotational resistance.

Claims (4)

밀폐용기와, 상기 밀폐용기 내에 설치되는 구동모터 및 압축기구를 포함하고,Including a sealed container, a drive motor and a compression mechanism installed in the sealed container, 상기 압축기구는 압축실을 갖춘 하우징과, 상기 압축실 내에서 회전하는 롤러와, 상기 롤러의 반경방향으로 진퇴하면서 상기 압축실을 구획하며 상호 슬라이딩 가능하게 지지된 제1베인 및 제2베인과, 압축용량 제어를 위해 상기 제1베인을 구속하거나 구속 해제하는 베인제어장치를 포함하며, 상기 제1베인이 후퇴하여 구속될 때 상기 밀폐용기 내부와 상기 압축실이 연통하도록 상기 제1베인의 운동경로에 마련된 연통공을 포함하는 용량가변 회전압축기.The compression mechanism includes a housing having a compression chamber, a roller that rotates in the compression chamber, first vanes and second vanes that partition the compression chamber while being radially retracted from the roller and are slidably supported; And a vane control device for restraining or releasing the first vane to control the compression capacity, wherein a movement path of the first vane communicates with the compression chamber inside the sealed container when the first vane is retracted and restrained. Capacity variable rotary compressor comprising a communication hole provided in. 제1항에 있어서,The method of claim 1, 상기 하우징은 중앙에 상기 압축실이 형성된 바디와, 상기 압축실의 상부 및 하부를 폐쇄하도록 상기 바디의 상부와 하부에 각각 결합된 상부 및 하부플랜지를 포함하며, 상기 연통공은 상기 제1베인의 운동경로 쪽 상기 상부플랜지에 형성된 것을 특징으로 하는 용량가변 회전압축기.The housing includes a body in which the compression chamber is formed at the center, and upper and lower flanges coupled to the upper and lower portions of the body to close the upper and lower portions of the compression chamber, respectively. Capacity variable rotation compressor characterized in that formed on the upper flange of the movement path. 제1항에 있어서,The method of claim 1, 상기 베인제어장치는 상기 제1베인 쪽의 상기 하우징에 설치된 실린더와, 상기 실린더 내에 진퇴 가능하게 설치되며 상기 제1베인과 연결된 피스톤과, 상기 실 린더 내부와 연통된 제1유로와, 상기 압축기의 토출측과 상기 제1유로를 연결하는 제2유로와, 상기 압축기의 흡입측과 상기 제1유로를 연결하는 제3유로와, 상기 제1, 제2, 제3유로가 상호 연결되는 지점에 설치된 유로가변밸브를 포함하는 것을 특징으로 하는 용량가변 회전압축기.The vane control device includes a cylinder installed in the housing on the first vane side, a piston installed in the cylinder to be retractable and connected to the first vane, a first flow path communicating with the inside of the cylinder, and A second passage connecting the discharge side and the first passage, a third passage connecting the suction side of the compressor and the first passage, and a passage provided at a point where the first, second, and third passages are interconnected. A variable displacement rotary compressor comprising a variable valve. 제3항에 있어서,The method of claim 3, 상기 베인제어장치는 상기 피스톤을 상기 롤러 쪽으로 가압하도록 상기 실린더 내에 설치된 스프링을 포함하는 것을 특징으로 하는 용량가변 회전압축기.The vane control device includes a spring installed in the cylinder to press the piston toward the roller.
KR1020050085272A 2005-09-13 2005-09-13 Variable capacity rotary compressor KR100780785B1 (en)

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