KR100259808B1 - Gas-counterflow preventing apparatus for scroll compressor - Google Patents

Gas-counterflow preventing apparatus for scroll compressor Download PDF

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Publication number
KR100259808B1
KR100259808B1 KR1019970053261A KR19970053261A KR100259808B1 KR 100259808 B1 KR100259808 B1 KR 100259808B1 KR 1019970053261 A KR1019970053261 A KR 1019970053261A KR 19970053261 A KR19970053261 A KR 19970053261A KR 100259808 B1 KR100259808 B1 KR 100259808B1
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South Korea
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gas
discharge cover
discharge
opening
scroll compressor
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KR1019970053261A
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Korean (ko)
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KR19990032276A (en
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이승주
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구자홍
엘지전자주식회사
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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
    • F04C18/02—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
    • F04C18/0207—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents both members having co-operating elements in spiral form
    • F04C18/0215—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents both members having co-operating elements in spiral form where only one member is moving
    • 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
    • F04C29/06—Silencing
    • 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

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)

Abstract

PURPOSE: A gas back flow prevention apparatus for scroll compressor is provided to minimize back flow of the compressed gas by allowing a non-return valve to be rapidly shut off by the pressure difference and its weight, and improve discharge efficiency of the compressor by minimizing flow channel resistance of the non-return valve. CONSTITUTION: An apparatus comprises a discharge cover(110) for dividing the inner space of the casing into a high pressure section and a low pressure section and which is fixed to the casing so as to seal a gas outlet port(8b) of a fixed scroll(8); and a plate(120) hinge-coupled to the upper surface of the discharge cover through a hinge piece(122) and which opens/shuts off a gas outlet hole(110a) formed at the discharge cover. The discharge cover has at a center thereof a protrusion(111), and the gas outlet hole is formed at one inclined surface of the protrusion. The plate is bent in such a manner that an end of the plate gets caught at the outer surface of the discharge cover, and the bent portion of the plate is coupled to the hinge piece.

Description

스크롤 압축기의 가스역류 방지장치{GAS-COUNTERFLOW PREVENTING APPARATUS FOR SCROLL COMPRESSOR}Gas backflow prevention device of scroll compressor {GAS-COUNTERFLOW PREVENTING APPARATUS FOR SCROLL COMPRESSOR}

본 발명은 스크롤 압축기에 관한 것으로, 특히 압축실로부터 토출되는 고압의 냉매가스가 토출실에서 다시 압축실로 역류하는 것을 최소화하는데 적합한 스크롤 압축기의 가스역류 방지장치에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a scroll compressor, and more particularly, to a gas backflow preventing device of a scroll compressor suitable for minimizing the backflow of a high-pressure refrigerant gas discharged from the compression chamber back into the compression chamber.

일반적으로 압축기는 기계적 에너지를 압축성 유체의 압축에너지로 변환시키는 것으로, 이러한 압축기는 크게 왕복동식 및 스크롤식 및 원심식(통상, 터보식이라고도 함) 그리고 베인식(통상, 회전식이라고도 함)으로 구분된다.Generally, a compressor converts mechanical energy into compressive energy of a compressive fluid, which is divided into reciprocating, scrolling, and centrifugal (commonly referred to as turbo) and vane (commonly referred to as rotary). .

이 중에서 상기 스크롤식 압축기는 피스톤의 직선운동을 이용하는 왕복동식 과는 달리 원심식이나 베인식과 같이 회전체를 이용하여 가스를 흡입 압축시켜 토출시키게 된다. 상기 스크롤식 압축기는 그 케이싱의 내부에 흡입가스가 충진되는지 아니면 토출가스가 충진되는지에 따라 저압식 스크롤 압축기 또는 고압식 스크롤 압축기로 나뉘어 진다.Among the scroll compressors, unlike the reciprocating type using the linear motion of the piston, the scroll compressor sucks and discharges the gas by using a rotating body such as a centrifugal type or a vane type. The scroll compressor is divided into a low pressure scroll compressor or a high pressure scroll compressor depending on whether suction gas or discharge gas is filled in the casing.

상기 저압식 스크롤 압축기는 도 1에 도시된 바와 같이, 케이싱(1)의 내주면 상,하부에 상,하부프레임(2,3)이 용접으로 고정되고, 그 상,하부프레임(2,3)의 사이에 고정자(4)가 고정 설치되며, 그 고정자(4)의 내주연에는 회전자(5)가 삽입 설치되고, 그 회전자(5)의 중앙에는 내부에 급유로(6a)가 형성된 구동축(6)이 상부프레임(2)의 중앙부를 관통하도록 압입되며, 상기 상부프레임(2)의 상단면에는 인벌류트 곡선으로 랩(Wrap)(7a)이 형성된 선회스크롤(7)이 구동축(6)과 편심되게 결합되어 얹혀지고, 그 선회스크롤(7)의 상측에는 선회스크롤(7)의 랩과 서로 맞물려 압축실을 형성하는 고정스크롤(8)이 얹혀져 상부프레임(2)의 가장자리에 체결되며, 상기 상부프레임(2)과 선회스크롤(7)의 사이에는 자전방지기구인 올담링(9)이 형합되어 있다.In the low pressure scroll compressor, as shown in FIG. 1, upper and lower frames 2 and 3 are fixed by welding on upper and lower inner circumferential surfaces of the casing 1, and the upper and lower frames 2 and 3 The stator 4 is fixedly installed therebetween, the rotor 5 is inserted into the inner circumference of the stator 4, and the drive shaft having an oil supply passage 6a formed therein in the center of the rotor 5 ( 6) is press-fitted to penetrate the center of the upper frame (2), the rotating scroll (7) having a wrap (7a) is formed in the involute curve on the upper surface of the upper frame (2) and the drive shaft (6) Eccentrically coupled and mounted, the upper side of the rotating scroll (7) is fixed to the edge of the upper frame (2) is fixed to the fixed scroll (8) is engaged with the wrap of the rotating scroll (7) to form a compression chamber, Between the upper frame 2 and the turning scroll 7, an old dam ring 9, which is a rotation preventing mechanism, is joined.

또한, 상기 고정스크롤(8)의 상측은 고압부와 저압부를 구획하는 토출커버(10)가 밀폐되고, 그 토출커버(10)의 중앙부에 형성된 가스토출공(10a)의 상면에는 토출가스의 역류를 방지하는 역지변(11)이 얹혀지며, 그 역지변(11)은 중앙부에 가스토출공(12a)이 형성된 역지변 하우징(12)에 의해 밀폐되고, 상기 역지변 하우징(12)의 상측에 형성된 토출실의 일측에는 토출관(13)이 케이싱(1)과 연통되어 있다.In addition, the upper side of the fixed scroll (8) is a discharge cover 10 for partitioning the high pressure portion and the low pressure portion is sealed, the reverse flow of the discharge gas to the upper surface of the gaseous discharge hole (10a) formed in the central portion of the discharge cover 10 The reverse displacement 11 which prevents is mounted, and the reverse displacement 11 is sealed by the reverse displacement housing 12 in which the gas discharge hole 12a was formed in the center, and is formed in the upper side of the reverse displacement housing 12. On one side of the discharge chamber, the discharge tube 13 communicates with the casing 1.

상기 역지변(11)은 그 테두리에 수개의 배기홈(11a)이 형성되고, 상기 역지변 하우징(12)의 가스토출공(12a) 주변은 상기 역지변(11) 상측면 전체가 역지변 하우징(12)의 저면에 밀착되는 것을 방지하도록 내측으로 볼록하게 돌출되며, 상기 역지변 하우징(12)의 함몰된 가장자리에도 가스토출공(12a)이 수개 형성되어 있다.The reverse side 11 has a plurality of exhaust grooves (11a) is formed in the edge, the periphery of the gas exit hole (12a) of the reverse side of the housing 12, the entire upper side of the reverse side (11) reverse displacement housing It protrudes convexly inward so as to prevent close contact with the bottom of 12, and several gas discharge holes 12a are formed in the recessed edge of the reverse side housing 12, too.

도면중 미설명 부호인 14는 흡입관, 15는 바이패스 밸브이다.In the drawings, reference numeral 14 denotes an intake pipe, and 15 represents a bypass valve.

상기와 같이 구성된 스크롤 압축기는, 인가된 전원에 의해 고정자(4)의 내측에서 회전자(5)가 회전을 하면서 구동축(6)을 회전시키고, 그 구동축(6)은 선회스크롤(7)을 편심거리 만큼 편심회전을 시키게 되는데, 이때 상기 올담링(9)에 의해 선회스크롤(7)은 축중심을 원점으로 선회반경만큼 떨어진 거리에서 선회운동을 하게 되고, 그 선회스크롤(7)의 선회운동에 의해 랩(7a,8a) 사이에는 압축실이 형성되며, 그 압축실은 지속적인 선회운동에 의해 중심으로 이동하면서 체적이 감소되어 흡입된 냉매가스를 더욱 압축하게 되고, 이렇게 압축된 고압의 냉매가스는 상기 고정스크롤(8)의 가스토출구(8b)를 통해 분출되면서 역지변(11)을 밀게 되며, 그 압축가스에 밀려올라가는 역지변(11)에 의해 토출커버(10)의 가스토출공(10a)이 열려 결국 압축가스가 토출실 및 토출관(13)으로 배출되는 것이었다.The scroll compressor configured as described above rotates the drive shaft 6 while the rotor 5 rotates inside the stator 4 by an applied power source, and the drive shaft 6 eccentrically rotates the scroll scroll 7. The eccentric rotation is made by the distance, wherein the turning scroll (7) by the Oldham ring (9) is a turning movement at a distance as far as the turning radius from the center of the axis, the turning movement of the turning scroll (7) The compression chamber is formed between the wraps 7a and 8a, and the compression chamber is moved to the center by the continuous swinging movement to reduce the volume to further compress the sucked refrigerant gas. The gaseous exit hole 10a of the discharge cover 10 is pushed by the reverse side edge 11 which is ejected through the gaseous outlet 8b of the fixed scroll 8 and is pushed up by the compressed gas. Eventually the compressed gas is discharged It was discharged to the pipe 13.

이와 같은 압축기의 전운전(全運轉)영역 내에서 역지변이 동작되는 과정을 살펴보면 다음과 같다.Looking at the process of the reverse displacement is operated in the entire operation region of the compressor as follows.

도 2b에 도시된 바와 같이, 먼저 압축기의 정상운전시에는 압축실에서 토출되는 가스의 압력(Pdc)이 토출실의 압력(Pd)보다 항상 크게 되어 상기 역지변(11)에 걸리는 힘은 항상 상방향(역지변 하우징(12)의 저면)으로 작용하게 되고, 이러한 힘에 의해 밀려올라가는 역지변(11)은 항상 역지변 하우징(12)의 저면에 달라붙어 결국 토출커버(10)의 가스토출공(10a)이 개방되는 것이다.As shown in FIG. 2B, first, during normal operation of the compressor, the pressure Pdc of the gas discharged from the compression chamber is always greater than the pressure Pd of the discharge chamber so that the force applied to the reverse displacement 11 is always upward. (The bottom of the reverse displacement housing 12), the reverse displacement 11 pushed up by this force is always stuck to the bottom surface of the reverse displacement housing 12, and eventually the gas discharge hole (10) of the discharge cover 10 10a) is open.

반면에, 압축기가 정지하는 경우에는 상기 역지변(11)이 자중에 의해 토출커버(10)의 상면에 얹혀져 가스토출공(10a)을 막은 상태로 있게 되는데, 이는 압축실에서 토출되는 시점의 가스압력(Pdc)이 토출실의 압력(Pd')에 비해 여전히 작은 상태로 유지되기 때문이다.On the other hand, when the compressor is stopped, the reverse valve 11 is placed on the upper surface of the discharge cover 10 by its own weight to block the gaseous discharge hole 10a, which is a gas discharged from the compression chamber. This is because the pressure Pdc is still kept smaller than the pressure Pd 'of the discharge chamber.

한편, 정지하고 있던 압축기가 재기동하게 되면, 압축실의 압력이 점차 상승하게 되어 어느 시점에서는 압축실의 압력(Pdc')이 토출실의 압력(Pd')에 비해 커지게 되고, 이 순간, 즉 토출개시시점의 압력(Pdc')이 토출실의 압력(Pd')에 비해 커지게 됨과 동시에, 고압의 냉매가스가 역지변(11)을 급작스럽게 밀어내게 되어 그 역지변(11)이 상승하면서 토출커버(10)의 가스토출공(10a)이 개방되는 것이었다.On the other hand, when the stationary compressor is restarted, the pressure in the compression chamber gradually increases, and at some point, the pressure Pdc 'of the compression chamber becomes larger than the pressure Pd' of the discharge chamber. While the pressure Pdc 'at the start of discharge becomes larger than the pressure Pd' of the discharge chamber, the high pressure refrigerant gas suddenly pushes the reverse displacement 11 and the reverse displacement 11 rises. The gas discharge hole 10a of the discharge cover 10 was opened.

그러나, 상기와 같이 역지변(11)이 역지변 하우징(12)에 포함되어 토출커버(10)의 상면에 얹히는 종래의 스크롤 압축기에 있어서는, 상기 역지변(11)이 압축실 압력(Pp)과 토출실 압력(Pd)간의 압력차에 의해 상하로 운동하면서 상기 토출커버(10)의 가스토출공(10a)을 개폐하는 것으나, 상기 압축기의 정지후 재기동시 고압의 냉매가스가 압축실로부터 급작스럽게 분출되는 과정에서는 토출커버(10)의 상면으로 하강되어 있던 역지변(11)이 갑자기 상승하면서 역지변 하우징(12)의 저면을 치면서 충격음이 발생시키는 문제점이 있었다.However, in the conventional scroll compressor in which the reverse displacement 11 is included in the reverse displacement housing 12 and placed on the upper surface of the discharge cover 10 as described above, the reverse displacement 11 is the compression chamber pressure Pp. Opening and closing the gaseous outlet hole 10a of the discharge cover 10 while moving up and down by a pressure difference between the discharge chamber pressure Pd and a high pressure refrigerant gas from the compression chamber when restarting after the compressor is stopped. In the sudden ejection process, there was a problem in that a shock sound was generated while hitting the bottom of the reverse displacement housing 12 while the reverse displacement 11 descended to the upper surface of the discharge cover 10 suddenly.

또한, 상기 역지변(11)이 수직방향으로 상하운동을 함에도 불구하고, 토출커버(10)의 가스토출공(10a)이 역지변(11)의 운동방향인 수직방향으로 형성되어 그 역지변(11)의 유로저항을 발생시킴에 따라 토출효율이 저하되는 문제점도 있었다.In addition, despite the vertical displacement 11 moves vertically, the gas discharge hole 10a of the discharge cover 10 is formed in the vertical direction which is the movement direction of the reverse displacement 11, and thus the reverse displacement ( There was also a problem that the discharge efficiency is lowered as the flow path resistance of 11) is generated.

따라서, 본 발명은 상기와 같은 종래 스크롤 압축기가 가지는 문제점을 감안하여 안출한 것으로, 압축기의 재기동시 압축실로부터 토출되는 냉매가스가 역지변을 밀어올리는 과정에서 충돌에 의한 이상소음이 발생되지 않는 스크롤 압축기의 가스역류 방지장치를 제공하는데 그 목적이 있다.Accordingly, the present invention has been made in view of the problems of the conventional scroll compressor as described above, and the scroll which does not generate abnormal noise due to a collision in the process of boosting the reverse displacement of the refrigerant gas discharged from the compression chamber when the compressor restarts. It is an object of the present invention to provide a gas backflow prevention device for a compressor.

본 발명의 다른 목적은 상기 역지변의 유로저항을 최소화하여 압축기의 토출효율을 향상시킬 수 있는 스크롤 압축기의 가스역류 방지장치를 제공하려는데 있다.Another object of the present invention is to provide a gas backflow preventing device of a scroll compressor which can improve the discharge efficiency of the compressor by minimizing the flow path resistance of the reverse displacement.

도 1은 종래 스크롤 압축기의 구성을 보인 종단면도.1 is a longitudinal sectional view showing a configuration of a conventional scroll compressor.

도 2a 및 도 2b는 종래 스크롤 압축기에 있어서, 압축 및 토출실의 압력상태에 따른 역지변의 동작상태를 설명하기 위해 보인 종단면도 및 P-V선도.2A and 2B are a longitudinal sectional view and a P-V diagram showing a state of operation of a reverse displacement according to a pressure state of a compression and discharge chamber in a conventional scroll compressor;

도 3은 본 발명에 의한 스크롤 압축기의 가스역류 방지장치를 보인 사시도.Figure 3 is a perspective view showing a gas backflow preventing device of the scroll compressor according to the present invention.

도 4는 본 발명에 의한 스크롤 압축기의 가스역류 방지장치에 대한 동작을 보인 종단면도.Figure 4 is a longitudinal sectional view showing the operation of the gas backflow prevention apparatus of the scroll compressor according to the present invention.

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

110 : 토출커버 110a : 가스토출공110: discharge cover 110a: gaseous venting

111 : 돌출부 120 : 개폐판111: protrusion 120: opening and closing plate

121 : 힌지돌주 122 : 힌지걸이편121: hinge stone 122: hinge hanger

이와 같은 본 발명의 목적을 달성하기 위하여, 케이싱의 내부를 고압부와 저압부로 구획하는 토출커버의 중앙부에 경사면이 구비되는 돌출부가 형성되고, 그 돌출부의 경사면에 압축가스가 저압부에서 고압부로 토출되는 가스토출공이 형성되며,In order to achieve the object of the present invention, a projection having a slope is formed in the center of the discharge cover that divides the inside of the casing into a high pressure portion and a low pressure portion, and the compressed gas is discharged from the low pressure portion to the high pressure portion on the slope of the protrusion. A gasoline hole is formed,

상기 토출커버의 가스토출공을 회전하면서 개폐하도록 회동개폐수단이 상기한 토출커버의 경사면에 힌지 결합되어 이루어지는 것을 특징으로 하는 스크롤 압축기의 가스역류 방지장치가 제공된다.The rotational opening and closing means is hinged to the inclined surface of the discharge cover to open and close while rotating the gas discharge hole of the discharge cover is provided with a gas flow prevention device of the scroll compressor.

이하, 본 발명에 의한 스크롤 압축기의 가스역류 방지장치를 첨부도면에 도시된 일실시예에 의거하여 상세하게 설명한다.Hereinafter, a gas backflow prevention apparatus of a scroll compressor according to the present invention will be described in detail with reference to an embodiment shown in the accompanying drawings.

도 3은 본 발명에 의한 스크롤 압축기의 가스역류 방지장치를 보인 사시도이고, 도 4는 본 발명에 의한 스크롤 압축기의 가스역류 방지장치에 대한 동작을 보인 종단면도이다.3 is a perspective view showing a gas backflow preventing apparatus of the scroll compressor according to the present invention, Figure 4 is a longitudinal cross-sectional view showing the operation of the gas backflow preventing apparatus of the scroll compressor according to the present invention.

이에 도시된 바와 같이 본 발명에 의한 스크롤 압축기의 가스역류 방지장치는, 케이싱의 내부를 고압부와 저압부로 구획하는 토출커버(110)가 고정스크롤(8)의 가스토출구(8b)를 밀봉하도록 케이싱에 고정되고, 상기 토출커버(110)의 상면에는 그 토출커버(110)의 가스토출공(110a)을 개폐하는 개폐판(120)이 힌지 결합되어 구성된다.As shown therein, the gas backflow prevention apparatus of the scroll compressor according to the present invention includes a casing so that the discharge cover 110 which partitions the inside of the casing into a high pressure portion and a low pressure portion seals the gas outlet 8b of the fixed scroll 8. It is fixed and the upper surface of the discharge cover 110 is composed of a hinge coupled to the opening and closing plate 120 for opening and closing the gas discharge hole (110a) of the discharge cover 110.

상기 토출커버(110)의 중앙부에는 비스듬히 경사져 상측으로 볼록한 돌출부(111)가 형성되고, 그 돌출부(111)의 일측 경사면에는 전술한 가스토출공(110a)이 형성된다.At the center of the discharge cover 110 is formed obliquely inclined upwardly projecting portion 111, and the one side inclined surface of the protrusion 111 is formed with the above-described gas discharge hole (110a).

상기 개폐판(120)의 일단은 토출커버(110)의 가스토출공(110a)보다 넓게 형성되는 반면에 중간부위 양측단면에는 힌지돌주(121)가 각각 형성되고, 그 각각의 힌지돌주(121)가 회동가능하게 끼워지는 힌지걸이편(122)이 상기 토출커버(110)의 돌출부(111) 일측에 일체된다.One end of the opening and closing plate 120 is formed to be wider than the gas-outlet hole 110a of the discharge cover 110, while the hinge protrusions 121 are formed on both side cross-sections of the middle portion, respectively, the respective hinge protrusions 121. The hinge hook piece 122 is pivotally fitted to one side of the protrusion 111 of the discharge cover 110.

여기서, 상기 개폐판(120)은 압축가스에 의해 원활하게 회동되도록 합성수지와 같은 가벼운 재질로 형성하는 것이 바람직하며, 또한 상기 가스토출공(110a)의 개방시 완전히 젖혀져 흡입행정시 재회동되지 않는 것을 방지하도록 중간부위가 유로저항을 발생시키지 않을 정도로 절곡되는 것이 바람직하다.Here, the opening and closing plate 120 is preferably formed of a light material such as synthetic resin so as to be smoothly rotated by the compressed gas, it is also fully flipped when opening the gas outlet hole (110a) is not re-rotated during the suction stroke It is preferable that the intermediate portion bends to such an extent that it does not generate flow resistance so as to prevent it.

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.

상기와 같은 본 발명에 의한 가스역류 방지장치가 구비된 스크롤 압축기에 있어서, 그 압축기의 기본적인 흡입 및 압축 그리고 토출과정은 종래와 동일하므로 상세한 설명은 생략하는 대신에 본 발명의 요지가 되는 가스역류 방지장치의 동작을 중심으로 살펴보면 다음과 같다.In the scroll compressor equipped with a gas backflow prevention apparatus according to the present invention as described above, the basic suction and compression and discharge process of the compressor is the same as the conventional one, so that the detailed description is omitted, instead of the gas backflow prevention that is the subject of the present invention The operation of the device is as follows.

즉, 압축기의 정상운전시, 상기 고정스크롤(8)의 가스토출구(8b) 및 토출커버(110)의 가스토출공(110a)을 통해 고압의 냉매가스가 토출되고, 그 압축실로부터 토출되는 개폐판(120)의 하측압력(Pdc)이 상측압력(Pd)에 비해 상대적으로 고압이 되어 개폐판(120)을 항상 밀어내게 되는데, 이때 상기 개폐판(120)은 그 중앙부위가 토출커버(110)에 힌지 결합되어 가스토출공(110a)을 통해 토출되는 압축가스에 의해 개폐판(120)이 힌지돌주(121)를 중심으로 회전하면서 토출커버(110)의 가스토출공(110a)이 열리게 된다.That is, during normal operation of the compressor, the high-pressure refrigerant gas is discharged through the gas outlet port 8b of the fixed scroll 8 and the gas outlet hole 110a of the discharge cover 110, and the opening and closing is discharged from the compression chamber. Lower pressure (Pdc) of the plate 120 is relatively high pressure than the upper pressure (Pd) to always push the opening and closing plate 120, the opening and closing plate 120 is the central portion of the discharge cover 110 Hinges are coupled to the hinge) and the gas opening hole 110a of the discharge cover 110 is opened while the opening and closing plate 120 rotates around the hinge protrusion 121 by the compressed gas discharged through the gas outlet hole (110a). .

이후, 압축기가 일시 정지하게 되면, 상기 개폐판(120)의 하측압력(Pdc)이 그 상측압력(Pd)에 비해 상대적으로 저압이 되고, 이에 따라 개폐판(120)이 자중 및 역류되는 상측압력(Pd)에 의해 눌려 힌지돌주(121)를 중심으로 정상운전 때와는 반대방향으로 회동하면서 상기 가스토출공(110a)을 닫게 된다.Subsequently, when the compressor is temporarily stopped, the lower pressure Pdc of the opening / closing plate 120 becomes a lower pressure relative to the upper pressure Pd thereof, and thus the upper pressure at which the opening / closing plate 120 is self-weighted and flows backward. Pressed by Pd, the gaseous exit hole 110a is closed while rotating in a direction opposite to that of the normal operation around the hinge protrusion 121.

이때, 상기 개폐판(120)은 그 중앙부위가 토출커버(110)에 힌지 결합되어 압축실과 토출실 사이의 압력차는 물론 개폐판 자중(自重)에 의해서도 원활하게 복귀하게 되는 것이다.At this time, the opening and closing plate 120 is hinged to the discharge cover 110, the center portion is to be smoothly returned by the pressure difference between the compression chamber and the discharge chamber as well as the opening and closing plate (self-weight).

이후, 압축기가 재기동하게 되면, 압축실 압력(Pdc')이 토출실의 압력(Pd')에 비해 순간적으로 고압이 되고, 이에 따라 상기 토출커버(110)의 상면에 얹혀져 있던 개폐판(120)이 열리면서 고압의 냉매가스가 경사지게 장착되는 개폐판(120)을 따라 비스듬히 토출되어 토출가스의 유로저항이 최소화되는 것은 물론, 상기 개폐판이 급작스럽게 열리더라도 그 개폐판(120)이 힌지돌주(121)를 중심으로 회전하면서 젖혀지게 되어 개폐판(120)의 충돌소음이 저감된다.Subsequently, when the compressor is restarted, the compression chamber pressure Pdc 'becomes instantaneously high compared with the pressure Pd' of the discharge chamber, and thus the opening and closing plate 120 mounted on the upper surface of the discharge cover 110 is provided. The opening and closing of the high pressure refrigerant gas is obliquely discharged along the opening and closing plate 120 to be inclined so that the flow resistance of the discharge gas is minimized, the opening and closing plate 120 is hinged column 121 even if the opening and closing the plate is suddenly opened. Rotating while rotating, the collision noise of the opening and closing plate 120 is reduced.

이상에서 설명한 바와 같이 본 발명에 의한 스크롤 압축기의 가스역류 방지장치는, 케이싱의 내부를 고압부와 저압부로 구획하는 토출커버의 중앙부에 경사면이 구비되는 돌출부가 형성되고, 그 돌출부의 경사면에 압축가스가 저압부에서 고압부로 토출되는 가스토출공이 형성되며, 상기 토출커버의 가스토출공을 회전하면서 개폐하도록 회동개폐수단이 상기한 토출커버의 경사면에 힌지 결합되도록 구성함으로써, 압축기의 정지시 역지변이 압력차 및 자중(自重)에 의해 신속하게 닫히게 되어 토출되었던 압축가스의 역류를 최소화하고, 압축기의 재기동시 압축실로부터 토출되는 냉매가스가 역지변을 밀어올리는 과정에서 충돌에 의한 이상소음 및 역지변의 파손을 방지하며, 상기 역지변의 유로저항을 최소화하여 압축기의 토출효율을 향상시킬 수 있다.As described above, in the gas backflow prevention apparatus of the scroll compressor according to the present invention, a protrusion having an inclined surface is formed at the center of the discharge cover which divides the inside of the casing into a high pressure portion and a low pressure portion. A gas discharge hole discharged from the low pressure part to the high pressure part is formed, and the rotation opening and closing means is hinged to the inclined surface of the discharge cover to open and close the gas discharge hole of the discharge cover by rotating the gas discharge hole. It closes quickly due to the difference between the vehicle and its own weight, minimizing the reverse flow of the discharged compressed gas.When the refrigerant gas discharged from the compression chamber pushes up the reverse side when the compressor is restarted, To prevent damage and to improve the discharge efficiency of the compressor by minimizing the flow resistance of the reverse There.

Claims (1)

케이싱의 내부를 고압부와 저압부로 구획하는 토출커버의 중앙부에 경사면이 구비되는 돌출부가 형성되고, 그 돌출부의 경사면에 압축가스가 저압부에서 고압부로 토출되는 가스토출공이 형성되며, 상기 토출커버의 가스토출공을 개폐하는 개폐판이 토출커버에 고정되는 힌지걸이편에 회동 가능하게 결합되되,A protrusion having an inclined surface is formed in a central portion of the discharge cover which divides the inside of the casing into a high pressure portion and a low pressure portion, and a gaseous ejection hole through which the compressed gas is discharged from the low pressure portion to the high pressure portion is formed on the slope of the protrusion. Opening and closing plate for opening and closing the discharge hole is rotatably coupled to the hinge hook piece fixed to the discharge cover, 상기 개폐판은 열림시 그 개폐판의 타단이 토출커버의 외측면에 걸리면서 지표면에 대해 직각 이내에서만 회동하도록 절곡 형성되어 그 절곡부가 상기한 힌지걸이편에 결합되는 것을 특징으로 하는 스크롤 압축기의 가스역류 방지장치.The opening and closing plate is bent to rotate only within the right angle with respect to the ground surface while the other end of the opening and closing plate is caught on the outer surface of the discharge cover, the bent portion is coupled to the hinge hook piece of the scroll compressor, characterized in that Prevention device.
KR1019970053261A 1997-10-17 1997-10-17 Gas-counterflow preventing apparatus for scroll compressor KR100259808B1 (en)

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