KR100273423B1 - Structure for preventing overpressure in hermetic type rotary compressor - Google Patents
Structure for preventing overpressure in hermetic type rotary compressor Download PDFInfo
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- KR100273423B1 KR100273423B1 KR1019980017536A KR19980017536A KR100273423B1 KR 100273423 B1 KR100273423 B1 KR 100273423B1 KR 1019980017536 A KR1019980017536 A KR 1019980017536A KR 19980017536 A KR19980017536 A KR 19980017536A KR 100273423 B1 KR100273423 B1 KR 100273423B1
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- refrigerant gas
- discharge port
- cylinder
- rolling piston
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Classifications
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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
- 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
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- 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
- F04B39/10—Adaptations or arrangements of distribution members
- F04B39/1073—Adaptations or arrangements of distribution members the members being reed valves
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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
- 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
- F04C29/126—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 of the non-return type
- F04C29/128—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 of the non-return type of the elastic type, e.g. reed valves
Abstract
Description
본 발명은 밀폐형 회전식 압축기의 과압축 방지구조에 관한 것으로서, 특히 냉매가스의 과압축을 방지하여 압축기의 성능을 향상시킬 수 있는 밀폐형 회전식 압축기의 과압축 방지구조에 관한 것이다.The present invention relates to an overcompression preventing structure of a hermetic rotary compressor, and more particularly to an overcompression preventing structure of a hermetic rotary compressor that can improve the performance of the compressor by preventing overcompression of refrigerant gas.
종래의 일반적인 밀폐형 회전식 압축기는, 도 1 및 도 2 에 도시한 바와 같이, 압축기 외부를 둘러싸는 밀폐용기(1)가 있고, 이 밀폐용기(1)의 내부에는 고정자(2)와 회전자(3) 등으로 구성되는 전동기구부가 설치되어 있다. 그리고 상기 회전자(3)의 내경에 압입되며 하부에 편심부(4a)가 형성된 크랭크축(4)과 상기 크랭크축(4)의 편심부(4a)를 감싸며 상부베어링(5) 및 하부베어링(6)과 함게 볼트(7)에 의해 결합되어 있는 실린더(8)와 상기 크랭크축(4)의 편심부(4a)에 삽입되어 실린더(8)의 내경을 접하면서 자전 및 공전하는 롤링피스톤(9)과 상기 롤링피스톤(9)의 외주면에 압착되어 고압부와 저압부를 분리하며 직선운동하는 베인(10)을 포함하여 구성되는 압축기구부가 설치되어 있다.Conventional hermetic rotary compressors, as shown in Figs. 1 and 2, have a sealed container (1) surrounding the outside of the compressor, the stator (2) and the rotor (3) inside the sealed container (1) ), And the electric mechanism part which consists of a) is provided. The upper bearing 5 and the lower bearing are enclosed by the crank shaft 4 and the eccentric portion 4a of the crank shaft 4, which are press-fitted into the inner diameter of the rotor 3 and have an eccentric portion 4a formed therein. 6 and a rolling piston 9 inserted into the cylinder 8 coupled by the bolt 7 and the eccentric portion 4a of the crankshaft 4 to rotate and rotate while contacting the inner diameter of the cylinder 8. ) And a compression mechanism including a vane 10 which is compressed to the outer circumferential surface of the rolling piston 9 and separates the high pressure portion and the low pressure portion and moves linearly.
그리고 베인(10)에 의해 고압부를 이루는 실린더(8)의 일측에 압축된 냉매가스를 토출할 수 있는 토출포트(8a)가 형성되어 있고 상기 상부베어링(5)의 일측에 상기 토출포트(8a)와 연통되게 토출공(5a)이 형성되어 있으며, 상부베어링(5)의 평면도인 도 3 에 도시한 바와 같이, 상부베어링(5) 상면에 일단이 고정된 탄성을 가지는 토출밸브(5b)의 타단이 상기 토출공(5a)을 개폐하도록 설치되어 있다.A discharge port 8a for discharging the compressed refrigerant gas is formed at one side of the cylinder 8 forming the high pressure part by the vane 10, and the discharge port 8a is provided at one side of the upper bearing 5. The discharge hole 5a is formed in communication with the other end, and as shown in FIG. 3, which is a plan view of the upper bearing 5, the other end of the discharge valve 5b having elasticity at one end fixed to the upper surface of the upper bearing 5. It is provided to open and close this discharge hole 5a.
또한, 상기 실린더(8)의 저압부에는 냉매가스가 실린더(8) 내부로 유입되는 흡입구(8b)가 형성되어 있고, 상기 흡입구(8b)는 밀폐용기(1)의 측부에 설치되는 어큐뮬레이터(11)와 냉매유입관(12)에 의해 연결되어 있다.In addition, an inlet port 8b through which refrigerant gas flows into the cylinder 8 is formed in the low pressure part of the cylinder 8, and the inlet port 8b is an accumulator 11 installed at the side of the sealed container 1. ) And a refrigerant inlet pipe (12).
미설명 부호 13은 베인을 탄성적으로 지지하는 탄성부재를, 14는 밀폐용기 내부에서 압축된 냉매가스가 외부로 토출되는 토출관을 그리고 15는 소음기를 나타낸 것이다.Reference numeral 13 denotes an elastic member for elastically supporting the vane, 14 denotes a discharge tube through which refrigerant gas compressed inside the sealed container is discharged to the outside, and 15 denotes a silencer.
상기 구성에서는 토출포트(8a)가 실린더(8)의 상측에 설치되고 이에 대응하여 토출공(5a)과 토출밸브(5b)도 상부베어링(5)측에 형성 혹은 설치되어 있으나 토출포트를 실린더(8)의 하측에 설치하고 이에 대응하는 토출공과 토출밸브를 하부베어링(6)에 설치하는 경우도 있다.In the above configuration, the discharge port 8a is provided on the upper side of the cylinder 8, and correspondingly, the discharge hole 5a and the discharge valve 5b are formed or installed on the upper bearing 5 side. It is also provided in the lower bearing 6 in the lower part of 8), and the corresponding discharge hole and discharge valve are provided.
상기한 구성으로 되는 압축기는 먼저, 전류가 인가되어 회전자(3)가 회전하게 되면 회전자(3)에 압입된 크랭크축(4)의 회전에 의해 롤링피스톤(9)이 실린더(8)의 내주면을 내접하면서 회전하게 되며 이로 인하여 실린더(8) 내부에 고압부와 저압부가 형성되면서 냉매가 어큐뮬레이터(11)를 통해 실린더(8) 내부로 유입되어 압축되고 냉매가스의 압력이 토출밸브(5b)의 탄성을 이길 정도로 압축되면 토출포트(8a)와 토출공(5a)을 통해 토출밸브(5b)를 밀어내며 냉매가스가 토출되어 소음기(15)를 거쳐 토출관(14)을 통해 사이클 내로 토출된다.In the compressor having the above-described configuration, first, when the current is applied and the rotor 3 rotates, the rolling piston 9 of the cylinder 8 is rotated by the rotation of the crank shaft 4 pressed into the rotor 3. The inner circumferential surface is rotated while being inscribed. As a result, a high pressure part and a low pressure part are formed inside the cylinder 8, and the refrigerant flows into the cylinder 8 through the accumulator 11 and is compressed. When compressed to overcome elasticity, the discharge valve 5b is pushed through the discharge port 8a and the discharge hole 5a, and the refrigerant gas is discharged and discharged into the cycle through the discharge pipe 14 through the silencer 15.
그런데 상기한 바와 같은 구조로 되는 종래의 밀폐형 회전식 압축기에는 다음과 같은 문제점이 있었다.However, the conventional hermetic rotary compressor having the structure as described above has the following problems.
즉, 일반적으로 냉매가스가 롤링피스톤(9)의 회전에 의해 압축되어 토출될 때 냉매가 완전히 토출되지 못하고 토출되지 못한 냉매가스에 대해서는 도 4 에 도시한 바와 같이 과압축이 일어나 압축기의 효율이 저하되고 압축기의 부하 증대에 따른 마모를 유발하는 문제점이 있었던 것이다.That is, in general, when the refrigerant gas is compressed and discharged by the rotation of the rolling piston 9, the refrigerant is not completely discharged, and overcompression occurs as shown in FIG. And there was a problem causing wear due to the increase in the load of the compressor.
따라서, 상기한 바와 같은 문제점을 인식하여 창출된 본 발명의 목적은 냉매가스에 대한 과압축 현상을 방지하여 압축기의 효율을 향상시키고 부하 증대에 따른 마모를 저감하는데 적합한 밀폐형 회전식 압축기의 과압축 방지구조를 제공하고자 하는 것이다.Accordingly, an object of the present invention created by recognizing the above problems is to prevent overcompression of refrigerant gas, thereby improving the efficiency of the compressor and preventing overcompression of a hermetic rotary compressor suitable for reducing wear caused by load increase. Is to provide.
도 1 은 종래의 일반적인 밀폐형 회전식 압축기의 구조를 도시한 종단면도.1 is a longitudinal sectional view showing the structure of a conventional general hermetic rotary compressor.
도 2 는 도 1 의 A-A 단면도.2 is a cross-sectional view taken along line A-A of FIG.
도 3 은 도 1 의 상부베어링의 평면도.3 is a plan view of the upper bearing of FIG.
도 4 는 종래 밀폐형 회전식 압축기에서 토출되는 냉매가스의 압력-체적 선도.4 is a pressure-volume diagram of refrigerant gas discharged from a conventional hermetic rotary compressor.
도 5 는 본 발명의 일실시례에 의한 밀폐형 회전식 압축기의 과압축 방지구조를 구비한 상부베어링의 구조를 도시한 평면도.5 is a plan view showing a structure of an upper bearing having an overcompression preventing structure of a hermetic rotary compressor according to an embodiment of the present invention.
도 6 은 본 발명에 의한 과압축 방지구조를 채용한 밀폐형 회전식 압축기에서 토출되는 냉매가스의 압력-체적 선도.6 is a pressure-volume diagram of refrigerant gas discharged from a hermetic rotary compressor employing an overcompression preventing structure according to the present invention.
(도면의 주요부분에 대한 부호의 설명)(Explanation of symbols for the main parts of the drawing)
4;크랭크축 4a;편심부4; crankshaft 4a; eccentric portion
5,5';상부베어링 5a,5'a,5'a';토출공5,5 '; Upper bearing 5a, 5'a, 5'a'; Discharge hole
5b,5'b,5'b';토출밸브5b, 5'b, 5'b '; discharge valve
상기한 바와 같은 본 발명의 목적을 달성하기 위하여, 롤링피스톤의 회전에 의해 압축되는 냉매가스를 실린더의 외부로 토출할 때 실린더 내부의 압력에 따라 단계적으로 토출되도록 실린더를 덮는 베어링에 두 개 이상의 토출공을 형성하고 상기 각각의 토출공을 개폐하는 토출밸브의 탄성이 그 토출밸브에 대응하는 토출포트가 회전하는 롤링피스톤에 접하는 순서로 커지도록 형성한 것을 특징으로 하는 밀폐형 회전식 압축기의 과압축 방지구조가 제공된다.In order to achieve the object of the present invention as described above, when discharging the refrigerant gas compressed by the rotation of the rolling piston to the outside of the cylinder, two or more discharge to the bearing covering the cylinder to be discharged step by step according to the pressure inside the cylinder The overcompression prevention structure of the hermetic rotary compressor, wherein the elasticity of the discharge valve for forming the ball and opening and closing the respective discharge holes is increased in the order in which the discharge port corresponding to the discharge valve is in contact with the rotating piston. Is provided.
이하, 첨부도면에 도시한 본 발명의 일실시례에 의거하여 본 발명을 상세히 설명하기로 한다.Hereinafter, the present invention will be described in detail with reference to one embodiment of the present invention shown in the accompanying drawings.
도 5 는 본 발명의 일실시례에 의한 밀폐형 회전식 압축기의 과압축 방지구조를 갖춘 베어링의 구조를 도시한 평면도로서, 종래 실린더(8)에 단일의 토출포트(8a)가 형성되고 단일의 토출포트(8a)에 대응하여 단일의 토출공(5a) 및 토출밸브(5b)가 있었던 것과 달리 본 발명에서는 두 개 이상의 토출포트(미도시)와 상기 토출포트에 각각 대응하는 토출공(5'a,5'a'), 토출밸브(5'b,5'b')가 설치되게 되며, 상기 토출밸브(5'b,5'b')들은 그 토출밸브(5'b,5'b')에 대응하는 토출포트가 회전하는 롤링피스톤(9)에 접하는 순서로 탄성이 커지도록 형성되게 된다.5 is a plan view showing a structure of a bearing having an overcompression preventing structure of a hermetic rotary compressor according to an embodiment of the present invention, in which a single discharge port 8a is formed in a conventional cylinder 8, and a single discharge port is provided. Unlike the single discharge hole 5a and the discharge valve 5b corresponding to 8a, in the present invention, two or more discharge ports (not shown) and discharge holes 5'a, respectively corresponding to the discharge port are provided. 5'a '), discharge valves 5'b and 5'b' are installed, and the discharge valves 5'b and 5'b 'are discharge valves 5'b and 5'b'. It is formed so that the discharge port corresponding to the elasticity increases in the order of contact with the rolling piston (9) rotated.
상기한 바와 같은 구조로 되는 본 발명에 의한 밀폐형 회전식 압축기의 과압축 방지구조의 작용을 설명하면 다음과 같다.Referring to the operation of the over-compression preventing structure of the hermetic rotary compressor according to the present invention having the structure as described above are as follows.
밀폐형 회전식 압축기의 전체적인 동작은 종래의 것과 동일하게 이루어지게 되나 실린더 내부의 냉매가스를 토출하는 과정에서 종래와 상이하다.The overall operation of the hermetic rotary compressor is the same as the conventional one, but is different from the conventional one in the process of discharging the refrigerant gas inside the cylinder.
이를 설명하면, 롤링피스톤(9)이 회전함에 따라 베인(10)과 롤링피스톤(9)의 외주면 일부 그리고 실린더(8)의 내주면 일부로 구획되는 압축공간의 부피가 줄어들면서 그 내부의 냉매가스가 압축되다가 롤링피스톤(9) 외주면과 실린더(8) 내주면의 선접촉되는 부분(이하 선접촉부라 한다)이 수개의 토출포트 중 가장 먼저 있는 토출포트에 가까워 지면 압축공간 내부 냉매가스의 압력이 첫번째 토출포트에 연결된 토출공(5'a)을 개폐하는 토출밸브(5'b)의 탄성을 이길 정도의 값이 되어 선접촉부가 첫 번째 토출포트를 지나기 직전까지 일정량의 냉매가스가 첫 번째 토출포트를 통해 토출되다가 선접촉부가 첫 번째 토출포트를 지나는 순간 실린더에 의해 첫 번째 토출포트가 막히면서 토출이 중지되게 된다.In this case, as the rolling piston 9 rotates, the volume of the compression space partitioned by the vane 10 and the outer peripheral surface portion of the rolling piston 9 and the inner peripheral surface portion of the cylinder 8 is reduced, and the refrigerant gas therein is compressed. When the portion in which the outer circumferential surface of the rolling piston 9 and the inner circumferential surface of the cylinder 8 (hereinafter referred to as the line contact portion) is close to the discharge port which is the first of several discharge ports, the pressure of the refrigerant gas in the compressed space is the first discharge port. The elasticity of the discharge valve 5'b that opens and closes the discharge hole 5'a connected to it is such that the amount of the refrigerant gas passes through the first discharge port until just before the line contact part passes the first discharge port. As soon as the line contact part passes through the first discharge port, the first discharge port is blocked by the cylinder and discharge is stopped.
그리고 선접촉부가 두 번째 토출포트를 지나기 조금 전부터 냉매가스의 압력이 두 번째 토출포트에 연결된 토출공(5'a')을 개폐하는 토출밸브(5'b')의 탄성을 이길 정도의 값이 되어 그 보다 높은 탄성값을 가지는 토출밸브가 토출공을 개폐하도록 된 다른 토출포트를 제외하고 두 번째 토출포트를 통해서만 상기와 유사하게 토출이 일어나게 되며 선접촉부가 두 번째 토출포트를 지나는 순간 토출이 중지되게 된다.And just before the line contact part passes through the second discharge port, the pressure of the refrigerant gas is such that the elasticity of the discharge valve 5'b 'for opening and closing the discharge hole 5'a' connected to the second discharge port is increased. The discharge occurs similarly to the above only through the second discharge port except for the other discharge port in which the discharge valve having a higher elastic value opens and closes the discharge hole, and the discharge stops at the moment when the line contact part passes the second discharge port. Will be.
이러한 과정을 베인(10)의 직전에 설치된 마지막 토출포트를 상기 선접촉부가 지날 때 까지 행하면서 단계적으로 압축된 냉매가스를 토출하게 되는 것이다.This process is performed to discharge the refrigerant gas compressed in stages while the last discharge port installed just before the vane 10 until the line contact portion passes.
상기한 바와 같은 구조로 되는 본 발명에 의한 밀폐형 회전식 압축기의 과압축 방지구조를 채용하는 경우에는 하나의 토출포트를 통해서 단시간내에 냉매가스를 토출하는 대신 여러개의 토출포트를 통해 시간차를 두고 조금씩 냉매가스를 토출하는 구조로 되므로, 도 6 에 도시한 바와 같이, 토출되는 가스의 토출압이 거의 일정하게 유지되며 과압축되지 않으므로 압축시 소요되는 일이 감소하여 압축기의 효율이 향상되고 마모가 저감되는 효과가 있다.In the case of employing the overcompression prevention structure of the hermetic rotary compressor according to the present invention having the above-described structure, instead of discharging the refrigerant gas within a short time through one discharge port, the refrigerant gas is gradually displaced through several discharge ports. 6, the discharge pressure of the discharged gas is maintained substantially constant and is not overcompressed so that the work required for compression is reduced, thereby improving the efficiency of the compressor and reducing wear. There is.
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| Application Number | Priority Date | Filing Date | Title |
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| KR1019980017536A KR100273423B1 (en) | 1998-05-15 | 1998-05-15 | Structure for preventing overpressure in hermetic type rotary compressor |
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| KR1019980017536A KR100273423B1 (en) | 1998-05-15 | 1998-05-15 | Structure for preventing overpressure in hermetic type rotary compressor |
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