KR100315804B1 - 2 step rotaty compressor - Google Patents
2 step rotaty compressor Download PDFInfo
- Publication number
- KR100315804B1 KR100315804B1 KR1019990007397A KR19990007397A KR100315804B1 KR 100315804 B1 KR100315804 B1 KR 100315804B1 KR 1019990007397 A KR1019990007397 A KR 1019990007397A KR 19990007397 A KR19990007397 A KR 19990007397A KR 100315804 B1 KR100315804 B1 KR 100315804B1
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- South Korea
- Prior art keywords
- refrigerant
- high pressure
- control unit
- low pressure
- flow rate
- Prior art date
Links
- 239000003507 refrigerant Substances 0.000 claims abstract description 64
- 230000006835 compression Effects 0.000 claims abstract description 16
- 238000007906 compression Methods 0.000 claims abstract description 16
- 238000000034 method Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 6
- 238000005057 refrigeration Methods 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 239000002826 coolant Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 1
- 238000000638 solvent extraction Methods 0.000 description 1
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
- 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
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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
- F04B39/08—Actuation of distribution members
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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
- F04C28/24—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
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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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
Abstract
본 발명은 종래의 능력가변형 로터리 압축기는 유량조절부에 고압과 저압을 교체하기 위하여 고가의 전동식 3방밸브를 사용하므로 전체 시스템의 가격이 상승되는 문제점이 있기 때문에; 증발기를 통과한 저압의 냉매가스가 유입되는 냉매흡입부와, 냉매가스가 압축되는 실린더와, 상기 실린더의 내부에서 회전되면서 냉매를 압축하는 롤러와, 일단이 상기 롤러에 접촉되어 상기 실린더 내부의 고압부와 저압부를 구획하는 베인과, 압축된 고압의 기체냉매가 토출되고 응축기에 연결된 냉매토출부와, 고압부의 냉매중 일부가 상기 냉매흡입부측으로 귀환되는 통로로 사용되는 귀환로와, 상기 귀환로상에 설치되고 피스톤을 이용하여 귀환로를 개폐시킴으로써 상기 압축기의 능력을 변화시키는 유량조절부와, 솔레노이드를 이용하여 상기 유량조절부에 고압 또는 저압을 인가하는 압축능력 제어부로 구성됨으로써; 유량조절부에 인가되는 압력을 제어하기 위하여 고가인 전동식 3방밸브 대신에 저가의 솔레노이드 타입 밸브를 사용하므로 시스템의 원가를 절감시킬 수 있는 능력가변형 로터리 압축기에 관한 것이다.The present invention is because the conventional variable capacity rotary compressor uses the expensive electric three-way valve to replace the high pressure and low pressure in the flow rate control unit because there is a problem that the price of the entire system increases; A refrigerant suction unit through which the low pressure refrigerant gas passes through the evaporator, a cylinder into which the refrigerant gas is compressed, a roller that rotates inside the cylinder to compress the refrigerant, and one end of the high pressure unit inside the cylinder by contacting the roller. And a vane for dividing the low pressure part, a refrigerant discharge part in which the compressed high pressure gas refrigerant is discharged and connected to the condenser, and a return path used as a passage through which some of the refrigerant of the high pressure part is returned to the refrigerant suction part, A flow rate control unit which is installed at and is adapted to change the capacity of the compressor by opening and closing the return path using a piston, and a compression capacity control unit which applies high pressure or low pressure to the flow rate control unit by using a solenoid; In order to control the pressure applied to the flow controller, a low-cost solenoid type valve is used instead of an expensive electric three-way valve, and thus the present invention relates to a variable rotary compressor capable of reducing the system cost.
Description
본 발명은 냉동회로에서 냉매를 압축하기 위하여 사용되는 로터리 압축기에 관한 것으로서, 특히 압축된 냉매의 일부를 재순환시킬 수 있도록 하여 회로내를 흐르는 냉매의 양을 가변시킴으로써 냉동회로의 능력을 변화시킬 수 있도록 한 2단 능력가변형 로터리 압축기에 관한 것이다.The present invention relates to a rotary compressor used for compressing a refrigerant in a refrigeration circuit, and in particular, to allow a part of the compressed refrigerant to be recycled so as to change the capacity of the refrigeration circuit by varying the amount of refrigerant flowing in the circuit. A two stage variable capacity rotary compressor is disclosed.
일반적으로 능력가변형 로터리 압축기는 도 1에 도시된 바와 같이, 에어컨과 같은 냉방장치의 냉동회로에 주로 사용된다. 즉, 로터리 압축기(10)는 냉매를 압축시키기 위하여 사용되는 바, 로터리 압축기(10)에서 압축된 냉매는 응축기(30)를 통과하면서 냉각되어 응축되고, 응축된 액냉매가 감압밸브(40)를 통과하면서 일부가 기화되어 2상냉매가 되며, 증발기(20)에서는 2상냉매가 주위공기를 냉각시키면서 완전히 기화되어 저압의 기체냉매가 된다. 저압의 기체냉매는 다시 로터리 압축기(10)에 공급되어 압축된 후, 상기의 경로를 다시 순환되는 것이다.In general, the variable capacity rotary compressor is mainly used in a refrigeration circuit of a cooling device such as an air conditioner, as shown in FIG. That is, the rotary compressor 10 is used to compress the refrigerant. The refrigerant compressed in the rotary compressor 10 is cooled and condensed while passing through the condenser 30, and the condensed liquid refrigerant is configured to reduce the pressure reducing valve 40. As it passes through, part of it is vaporized to become a two-phase refrigerant, and in the evaporator 20, the two-phase refrigerant is completely vaporized while cooling the surrounding air to become a low-pressure gas refrigerant. The low pressure gas refrigerant is supplied to the rotary compressor 10 again to be compressed and then circulated again in the above path.
여기서, 상기 로터리 압축기(10)는 능력가변형으로서 응축기(30) 또는 증발기(20) 측의 냉매압력을 이용하여 압축능력을 변화시키고 있다. 즉, 로터리 압축기(10)의 유량조절장치(17)에 증발기(20) 측의 저압을 인가하면 압축기(10)의 능력이 50%로 떨어지고, 응축기(30) 측의 고압을 인가하면 압축기(10)의 능력을 100% 발휘하고 있는 것이다.Here, the rotary compressor 10 changes the compression capacity by using the refrigerant pressure on the side of the condenser 30 or the evaporator 20 as the capacity change. That is, when the low pressure on the evaporator 20 side is applied to the flow rate controller 17 of the rotary compressor 10, the capacity of the compressor 10 drops to 50%, and when the high pressure on the condenser 30 side is applied, the compressor 10 ) 100% of the ability to demonstrate.
상기한 종래의 능력가변형 로터리 압축기는 도 2a와 도 2b에 도시된 바와 같이 증발기(20)를 통과한 저압의 냉매가스가 유입되는 냉매흡입부(14)와, 냉매가스가 압축되는 실린더(11)와, 상기 실린더(11)의 내부에서 회전되면서 냉매를 압축하는 롤러(12)와, 일단이 상기 롤러(12)에 접촉되어 상기 실린더(11) 내부의 고압부와 저압부를 구획하는 베인(13)과, 압축된 고압의 기체냉매가 토출되고 응축기(30)에 연결된 냉매토출부(14)와, 고압부의 냉매중 일부가 상기 냉매흡입부(11)측으로 귀환되는 통로로 사용되는 귀환로(16)와, 상기 귀환로(16)상에 설치되고 피스톤(17')을 이용하여 귀환로(16)를 개폐시킴으로써 압축기(10)의 능력을 변화시키는 유량조절부(17)와, 상기 유량조절부(17)에 고압 또는 저압을 인가하여 피스톤(17')의 위치를 변화시킴으로써 압축기(10)의 능력을 변화시키는 3방밸브(18)로 구성되어 있다.As described above, the conventional variable capacity rotary compressor includes a refrigerant suction part 14 through which a low pressure refrigerant gas passes through the evaporator 20 and a cylinder 11 into which the refrigerant gas is compressed, as shown in FIGS. 2A and 2B. And a roller 12 rotating the inside of the cylinder 11 to compress the refrigerant, and a vane 13 having one end contacting the roller 12 to partition the high pressure part and the low pressure part inside the cylinder 11. And a return path 16 used as a passage through which the compressed high-pressure gas refrigerant is discharged and the refrigerant discharge part 14 connected to the condenser 30 and a part of the refrigerant of the high pressure part is returned to the refrigerant suction part 11 side. And a flow rate control unit 17 installed on the return path 16 to change the capacity of the compressor 10 by opening and closing the return path 16 using a piston 17 ', and the flow rate adjusting unit 17. Capacity of the compressor 10 by changing the position of the piston 17 'by applying a high or low pressure It consists of a three-way valve 18 for changing the pressure.
상기와 같이 구성된 종래의 능력가변형 로터리 압축기는 유량조절부에 고압 또는 저압을 인가하여 피스톤의 위치를 변화시킴으로써 압축능력을 변화시키고 있다.The conventional variable capacity rotary compressor configured as described above is changing the compression capacity by applying a high pressure or a low pressure to the flow rate control unit to change the position of the piston.
압축기의 능력을 100% 작동시킬 때는 도 2a에 도시된 바와 같이 유량조절부(17)에 고압을 인가한다. 즉, 3방밸브(18)의 A유로가 열리게 되므로 응축기(30) 앞부분의 냉매압력이 3방밸브(18)를 통해 유량조절부(17)에 인가된다. 따라서, 유량조절부(17)의 피스톤(17')은 상승되어 귀환로(16)를 차단하게 되고, 귀환로(16)가 차단됨에 따라 실린더(11)의 고압부에 있는 고압냉매는 모두가 냉매토출부(15)를 통해 응축기(30)쪽으로 공급된다. 이때, 응축기(30)쪽으로 공급되는 냉매의 일부가 상기 3방밸브(18)를 통해 유량조절부(17)에 인가되므로, 피스톤(17') 양측의 압력이 균형을 이루어 피스톤(17')은 그 위치를 유지하게 된다.When operating the compressor at 100% capacity, high pressure is applied to the flow control unit 17 as shown in FIG. 2A. That is, since the A channel of the three-way valve 18 is opened, the refrigerant pressure in the front of the condenser 30 is applied to the flow rate control unit 17 through the three-way valve 18. Therefore, the piston 17 'of the flow rate controller 17 is raised to block the return path 16, and as the return path 16 is blocked, all of the high pressure refrigerant in the high pressure part of the cylinder 11 is refrigerant. It is supplied to the condenser 30 through the discharge part 15. At this time, since a part of the refrigerant supplied to the condenser 30 is applied to the flow rate control unit 17 through the three-way valve 18, the pressure on both sides of the piston 17 'is balanced so that the piston 17' That position.
압축기(10)의 능력이 과다한 것으로 판단되면 50% 능력만을 발휘하도록 할 수 있다. 이 경우에는 3방밸브(18)의 A유로가 차단되고 B유로가 열리게 함으로써 증발기(20) 측의 저압이 유량조절부(17)에 인가되도록 하는 것이다. 따라서, 유량조절부(17)의 피스톤(17')은 양측의 압력차에 의해 하강되고, 피스톤(17')의 하강에 따라 귀환로(16)가 개방되어 실린더(11)의 고압부에 있는 고압냉매의 일부가 귀환로(16)를 통해 냉매흡입부(14)측으로 흐르게 된다. 결국, 실린더(11)의 내부로 유입되는 냉매의 압력이 상승되어 압축기(10)가 하는 일은 절반 정도로 감소되는 것이다.If it is determined that the capacity of the compressor 10 is excessive, only 50% of the capacity may be exerted. In this case, the channel A of the three-way valve 18 is blocked and the channel B is opened so that the low pressure on the evaporator 20 side is applied to the flow rate controller 17. Therefore, the piston 17 'of the flow regulating part 17 is lowered by the pressure difference of both sides, and the return path 16 is opened with the lowering of the piston 17', and the high pressure in the high pressure part of the cylinder 11 is carried out. A part of the coolant flows to the coolant suction part 14 through the return path 16. As a result, the pressure of the refrigerant flowing into the cylinder 11 is increased and the work of the compressor 10 is reduced by about half.
그러나, 상기와 같이 구성된 종래의 능력가변형 로터리 압축기는 유량조절부에 고압과 저압을 교체하기 위하여 고가의 전동식 3방밸브를 사용하므로 전체 시스템의 가격이 상승되는 문제점이 있다.However, the conventional variable capacity rotary compressor configured as described above has a problem in that the price of the entire system is increased because an expensive electric three-way valve is used to replace the high pressure and the low pressure in the flow controller.
본 발명은 상기한 종래 기술의 문제점을 해결하기 위하여 안출된 것으로서, 솔레노이드 방식을 이용하여 유량조절부에 인가되는 압력을 조절함으로써, 전체시스템의 원가를 절감시킬 수 있는 2단 능력가변형 로터리 압축기를 제공하는데 그 목적이 있다.The present invention has been made to solve the above problems of the prior art, by adjusting the pressure applied to the flow control unit using a solenoid method, to provide a two-stage variable capacity rotary compressor that can reduce the cost of the entire system. Its purpose is to.
도 1은 종래의 능력가변형 로터리 압축기가 포함된 냉동회로가 도시된 구성도,1 is a configuration diagram showing a refrigerating circuit including a conventional variable capacity rotary compressor,
도 2a는 종래의 능력가변형 로터리 압축기가 100%의 능력을 발휘할 때 압축기의 상태가 도시된 작동도,2A is an operation diagram showing the state of the compressor when the conventional variable capacity rotary compressor exhibits 100% capacity;
도 2b는 종래의 능력가변형 로터리 압축기가 50%의 능력을 발휘할 때 압축기의 상태가 도시된 작동도,2B is an operation diagram showing the state of the compressor when the conventional variable capacity rotary compressor exerts 50% of its capacity;
도 3은 본 발명에 의한 2단 능력가변형 로터리 압축기가 도시된 구성도,3 is a configuration diagram showing a two-stage variable capacity rotary compressor according to the present invention;
도 4a는 본 발명의 요부구성인 압축능력 제어부에서 100%의 능력을 발휘할 때의 상태가 도시된 작동도,4A is an operation diagram showing a state when the 100% capacity in the compression capacity control unit that is the main configuration of the present invention,
도 4b는 본 발명의 요부구성인 압축능력 제어부에서 100%의 능력을 발휘할 때의 상태가 도시된 작동도이다.4B is an operation diagram illustrating a state when the compression capability control unit, which is a main component of the present invention, exhibits 100% capacity.
<도면의 주요부분에 대한 부호의 설명><Description of the symbols for the main parts of the drawings>
50 : 로터리 압축기 51 : 실린더50: rotary compressor 51: cylinder
52 : 롤러 53 : 베인52: roller 53: vane
54 : 냉매흡입부 55 : 냉매토출부54: refrigerant suction unit 55: refrigerant discharge unit
56 : 귀환로 57 : 유량조절부56: return path 57: flow control unit
60 : 압축능력 제어부 61 : 솔레노이드60: compression capacity control unit 61: solenoid
62 : 케이스 63 : 피스톤62: case 63: piston
64 : 슬라이더 65 : 스토퍼64: Slider 65: Stopper
상기한 목적을 달성하기 위한 본 발명은 증발기를 통과한 저압의 냉매가스가 유입되는 냉매흡입부와, 냉매가스가 압축되는 실린더와, 상기 실린더의 내부에서 회전되면서 냉매를 압축하는 롤러와, 일단이 상기 롤러에 접촉되어 상기 실린더 내부의 고압부와 저압부를 구획하는 베인과, 압축된 고압의 기체냉매가 토출되고 응축기에 연결된 냉매토출부와, 고압부의 냉매중 일부가 상기 냉매흡입부측으로 귀환되는 통로로 사용되는 귀환로와, 상기 귀환로상에 설치되고 피스톤을 이용하여 귀환로를 개폐시킴으로써 압축기의 능력을 변화시키는 유량조절부와, 상기 유량조절부에 고압 또는 저압을 인가하는 유량 조절하는 압축능력 제어부를 포함하는 2단 능력가변형 로터리 압축기에 있어서, 상기 압축능력 제어부는 고압측과 저압측 및 상기 유량조절부에 연결되는 포트가 각각 형성된 케이스와; 상기 케이스의 내부에 설치되어 전후 이동되고 돌출부가 형성된 피스톤과; 상기 케이스의 외부에 설치되고 상기 피스톤을 전후 이동시키는 솔레노이드와; 상기 피스톤에 의해 이동되어 고압측 포트를 차단하는 슬라이더와, 상기 슬라이더의 이동을 차단하여 저압측 포트가 폐쇄되도록 하는 스토퍼로 이루어지는 압축능력 제어부를 포함하여 구성된 것을 특징으로 한다.The present invention for achieving the above object is a refrigerant suction unit through which a low pressure refrigerant gas is passed through the evaporator, a cylinder into which the refrigerant gas is compressed, a roller for compressing the refrigerant while rotating in the cylinder, and one end A vane contacting the roller and partitioning the high pressure part and the low pressure part inside the cylinder, a compressed high pressure gas refrigerant is discharged and connected to the condenser, a refrigerant discharge part connected to the condenser, and a part of the refrigerant of the high pressure part returned to the refrigerant suction part A return path to be used, a flow rate control part installed on the return path and changing a capacity of the compressor by opening and closing the return path using a piston, and a compression capacity control part to adjust a flow rate to apply high pressure or low pressure to the flow rate control part. In the two-stage variable capacity rotary compressor comprising a, the compression capacity control unit high pressure side and low pressure side and the flow rate control It is connected to a port formed in each case; A piston installed inside the case and moved back and forth and having a protrusion formed therein; A solenoid installed outside the case and moving the piston back and forth; And a compression capacity control unit including a slider moved by the piston to block the high pressure side port, and a stopper to block the movement of the slider to close the low pressure side port.
이하, 본 발명의 바람직한 실시 예를 첨부된 도면을 참조하여 설명하면 다음과 같다.Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.
본 발명의 2단 능력가변형 로터리 압축기는 도 3에 도시된 바와 같이 증발기를 통과한 저압의 냉매가스가 유입되는 냉매흡입부(54)와, 냉매가스가 압축되는 실린더(51)와, 상기 실린더(51)의 내부에서 회전되면서 냉매를 압축하는 롤러(52)와, 일단이 상기 롤러(52)에 접촉되어 상기 실린더(51) 내부의 고압부와 저압부를 구획하는 베인(53)과, 압축된 고압의 기체냉매가 토출되고 응축기에 연결된 냉매토출부(55)와, 고압부의 냉매중 일부가 상기 냉매흡입부(54) 측으로 귀환되는통로로 사용되는 귀환로(56)와, 상기 귀환로(56)상에 설치되고 피스톤(57')을 이용하여 귀환로(56)를 개폐시킴으로써 압축기(50)의 능력을 변화시키는 유량조절부(57)와, 솔레노이드(61)를 이용하여 상기 유량조절부(57)에 고압 또는 저압을 인가하는 압축능력 제어부(60)로 구성된다.As shown in FIG. 3, the two-stage variable capacity rotary compressor according to the present invention includes a refrigerant suction unit 54 into which refrigerant gas of low pressure passing through an evaporator is introduced, a cylinder 51 into which refrigerant gas is compressed, and the cylinder ( A roller 52 for compressing a refrigerant while being rotated inside the 51, a vane 53 having one end contacting the roller 52 to partition a high pressure part and a low pressure part inside the cylinder 51, and a compressed high pressure. A refrigerant discharge part 55 discharged from the gas refrigerant and connected to a condenser, a return path 56 used as a passage for returning some of the high-pressure refrigerant to the refrigerant suction part 54, and on the return path 56 And a flow rate adjusting section 57 for changing the capacity of the compressor 50 by opening and closing the return path 56 using the piston 57 'and the flow rate adjusting section 57 using the solenoid 61. Compression capacity control unit 60 for applying a high pressure or a low pressure to the.
상기 압축능력 제어부(60)는 도 4a와 도 4b에 도시된 바와 같이, 고압측과 저압측 및 상기 유량조절부에 연결되는 포트가 각각 형성된 케이스(62)와, 상기 케이스(62)의 내부에 설치되어 전후 이동되고 돌출부(63')가 형성된 피스톤(63)과, 상기 케이스(62)의 외부에 설치되고 상기 피스톤(63)을 전후 이동시키는 솔레노이드(61)와, 상기 피스톤(63)에 의해 이동되어 고압측 포트를 차단하는 슬라이더(64)와, 상기 슬라이더(64)의 이동을 차단하여 저압측 포트가 폐쇄되도록 하는 스토퍼(65)로 구성된다.As shown in FIGS. 4A and 4B, the compression capacity control unit 60 includes a case 62 having ports connected to the high pressure side, the low pressure side, and the flow rate control unit, respectively, and inside the case 62. A piston 63 installed and moved back and forth and having a protrusion 63 ', a solenoid 61 installed outside the case 62 and moving the piston 63 back and forth, and by the piston 63 A slider 64 which is moved to block the high pressure side port, and a stopper 65 which blocks the movement of the slider 64 to close the low pressure side port.
여기서, 상기 슬라이더(64)는 전후 방향으로만 이동되고, 상기 피스톤(63)이 후퇴된 상태에서 상기 슬라이더(64)가 스토퍼(65)에 밀착된 상태를 유지하도록 슬라이더(64)를 탄발시키는 리턴스프링(미 도시)이 더 설치되기도 한다.Here, the slider 64 is moved only in the front-rear direction, and returns to the cylinder 64 so that the slider 64 is kept in close contact with the stopper 65 while the piston 63 is retracted. Springs (not shown) may be further installed.
상기와 같이 구성된 본 발명의 능력가변형 로터리 압축기는 솔레노이드의 동작에 따라 압축기의 압축능력이 100% 또는 50%로 변화하게 된다.In the variable capacity rotary compressor of the present invention configured as described above, the compression capacity of the compressor is changed to 100% or 50% according to the operation of the solenoid.
압축기(50)의 압축능력을 100% 발휘하는 경우에는 도 4a에 도시된 바와 같이 솔레노이드(61)가 동작되지 않아 피스톤(63) 및 슬라이더(64)가 후퇴된 상태에 있게 된다. 즉, 슬라이더(64)가 고압측의 압력에 의해 스토퍼(65)에 밀착된 상태를 유지함으로써 저압측 포트를 폐쇄시키게 된다. 따라서, 고압측의 냉매가 고압측 포트와 유량조절부(57) 사이에 형성된 B유로를 통해 유량조절부(57)에 인가되고, 유량조절부(57)의 피스톤(57')이 상승되어 귀환로(56)를 차단하게 된다. 결국, 실린더(51)의 고압부에 있는 고압냉매는 모두가 냉매토출부(55)를 통해 응축기쪽으로 공급되고, 압축기(50)는 그 능력을 100% 사용하게 된다.In the case where the compression capacity of the compressor 50 is exhibited 100%, the solenoid 61 is not operated as shown in FIG. 4A, so that the piston 63 and the slider 64 are in a retracted state. That is, the slider 64 closes the low pressure side port by maintaining the state in which the slider 64 is in close contact with the stopper 65 by the pressure on the high pressure side. Therefore, the refrigerant on the high pressure side is applied to the flow rate control unit 57 through the B flow path formed between the high pressure side port and the flow rate control unit 57, and the piston 57 'of the flow rate control unit 57 is raised and returned. The furnace 56 will be blocked. As a result, all of the high pressure refrigerant in the high pressure portion of the cylinder 51 is supplied to the condenser through the refrigerant discharge portion 55, and the compressor 50 uses 100% of its capacity.
압축기(50)의 능력을 50%만 발휘하도록 하기 위해서는 솔레노이드(61)에 전원을 인가한다. 솔레노이드(61)에 전원이 인가되면 피스톤(63)이 전진하게 되고, 피스톤(63)의 돌출부(63')에 의해 슬라이더(64)가 전진되어 고압측 포트를 차단하게 된다. 따라서, 고압측 포트와 유량조절부(57) 사이에 형성된 B유로가 차단되고, 저압측 포트와 유량조절부(57) 사이에 형성된 A유로가 열리게 되어 유량조절부(57)에 저압이 인가된다.In order to exert 50% of the capacity of the compressor 50, power is applied to the solenoid 61. When power is applied to the solenoid 61, the piston 63 is advanced, and the slider 64 is advanced by the protrusion 63 ′ of the piston 63 to block the high pressure side port. Therefore, the B flow path formed between the high pressure side port and the flow rate control part 57 is blocked, and the A flow path formed between the low pressure side port and the flow rate control part 57 is opened to apply a low pressure to the flow rate control part 57. .
유량조절부(57)에 저압이 인가되면 유량조절부(57)의 피스톤(57') 양단에 걸리는 압력 차이로 피스톤(57')이 하강되고, 그에 따라 귀환로(56)가 개방되어 실린더(51)의 고압부에 있는 고압냉매의 일부가 귀환로(56)를 통해 냉매흡입부(54) 측으로 흐르게 된다. 결과적으로, 실린더(51)의 내부로 유입되는 냉매의 압력은 상승되고 압축기(50)가 하는 일은 감소되며 압축기(50)의 능력은 50% 정도만 발휘하게 된다.When low pressure is applied to the flow regulating part 57, the piston 57 ′ is lowered due to the pressure difference across the piston 57 ′ of the flow regulating part 57, and accordingly, the return path 56 is opened to open the cylinder ( A portion of the high pressure refrigerant in the high pressure portion of 51 passes through the return path 56 toward the refrigerant suction portion 54. As a result, the pressure of the refrigerant flowing into the cylinder 51 is increased, the work of the compressor 50 is reduced, and the capacity of the compressor 50 is about 50%.
이와 같이, 본 발명의 2단 능력가변형 로터리 압축기는 유량조절부에 인가되는 압력을 제어하기 위하여 고가인 전동식 3방밸브 대신에 저가의 솔레노이드 타입 밸브를 사용하므로 시스템의 원가를 절감시킬 수 있는 이점이 있다.As described above, the two-stage variable capacity rotary compressor of the present invention uses an inexpensive solenoid valve instead of an expensive electric three-way valve to control the pressure applied to the flow control unit, thereby reducing the cost of the system. have.
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| KR1019990007397A KR100315804B1 (en) | 1999-03-05 | 1999-03-05 | 2 step rotaty compressor |
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| KR100620040B1 (en) * | 2005-02-23 | 2006-09-11 | 엘지전자 주식회사 | Modulation apparatus for rotary compressor and airconditioner with this |
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