WO2020217385A1 - ロータリ圧縮機 - Google Patents
ロータリ圧縮機 Download PDFInfo
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- WO2020217385A1 WO2020217385A1 PCT/JP2019/017646 JP2019017646W WO2020217385A1 WO 2020217385 A1 WO2020217385 A1 WO 2020217385A1 JP 2019017646 W JP2019017646 W JP 2019017646W WO 2020217385 A1 WO2020217385 A1 WO 2020217385A1
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- cylinders
- suction
- cylinder
- inner diameter
- pipe
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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
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
- F04C15/06—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
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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
- F04C23/00—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
- F04C23/001—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids of similar working principle
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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
- F04C23/00—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
- F04C23/008—Hermetic pumps
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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
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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
-
- 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
- F04C2240/80—Other components
- F04C2240/806—Pipes for fluids; Fittings therefor
Definitions
- the present invention relates to a rotary compressor.
- Patent Document 1 Conventionally, as a rotary compressor, for example, as shown in Patent Document 1, a housing, a rotary shaft extending in the vertical direction in the housing and rotating by an electric motor, and a rotary compressor having a cylinder supported by the rotary shaft. , An upper bearing that is rotatably supported by a rotating shaft and fixed to the top and bottom of the cylinder, and a lower bearing are known. A suction pipe capable of introducing a refrigerant into the compression chamber of the rotary compression unit is connected to the cylinder. Further, Patent Document 1 also discloses a twin rotary compressor in which cylinders are arranged in two stages vertically. Each cylinder is connected to at least one suction tube that extends separately from the accumulator.
- the thickness of the separator plate interposed between the cylinders in order to reduce the vibration. This is because if the separator plate is made thicker, the two cylinders will be separated from each other, and the influence of vibration due to the eccentric movement of the piston rotor will increase. However, if the thickness of the separator plate is reduced, it becomes difficult to process the suction pipes at the connection portion between the two suction pipe housings. Therefore, in order to widen the space between the suction pipes in order to facilitate processing, it is necessary to make the separator plate thicker or the suction pipes thinner.
- the present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a rotary compressor having a plurality of cylinders, which can reduce vibration without lowering the compression efficiency.
- the present invention has adopted the following aspects in order to solve the above problems and achieve the above object.
- the rotary compressor according to one aspect of the present invention includes a rotating shaft extending along an axis, a bearing that rotatably supports the rotating shaft around the axis, a motor for rotating the rotating shaft, and the rotation.
- a rotary compression unit that compresses the refrigerant by rotating the shaft, a housing that houses the rotary shaft, the bearing, the motor, and the rotary compression unit, and a suction pipe that can introduce the refrigerant into the compression chamber of the rotary compression unit.
- the rotary compression unit includes, a plurality of cylinders forming the compression chamber and arranged side by side in the vertical direction, and a separator plate arranged between the plurality of cylinders, and the suction portion is provided.
- the pipes are a main pipe arranged above or below the cylinder and extending through the housing in the radial direction of the rotation shaft, and a plurality of pipes connected to the main pipe and extending in the axial direction of the rotation shaft. It has a connecting pipe arranged between the plurality of cylinders on the radial outside of the compression chamber in the cylinder and communicating with each of the compression chambers.
- the main pipe of the suction pipe is arranged above or below each of the plurality of cylinders, and in each of the compression chambers of the plurality of cylinders via the connecting pipe extending in the axial direction.
- the refrigerant can be inhaled.
- the refrigerant can be sucked into each of the compression chambers by one suction pipe without connecting the compression chambers of the plurality of cylinders to reduce the compression efficiency. If only one suction pipe can be used, it is easy to process the portion connecting the suction pipe to the housing even if the thickness of the separator plate is reduced.
- the inner diameter of the main pipes is not limited by the thickness of the cylinders, and the inner diameter of the main pipes is increased. It becomes possible to do. Further, the inner diameter of the connecting pipe can be increased. Therefore, more refrigerant can be compressed and the compression efficiency can be improved.
- the inner diameter of the suction pipe may be larger than the thickness of the cylinder.
- each of the plurality of cylinders has a suction flow path extending in the radial direction and communicating the compression chamber and the connecting pipe. It may be provided.
- each compression chamber can be supplied to each compression chamber via each suction flow path extending in the radial direction through a connecting pipe extending in the axial direction from the suction pipe. Therefore, the flow can be efficiently divided from one suction pipe into the compression chambers of a plurality of cylinders, and the compression efficiency can be improved.
- the suction flow path is opened on the outer peripheral surface of the cylinder to provide an opening hole in the cylinder, and a sealing plug is provided in the opening hole. It may have been.
- a lateral hole can be machined in each cylinder to form a suction flow path.
- the opening hole is sealed by the sealing plug. Therefore, while easily processing the suction flow path, the refrigerant flowing through the connecting pipe is outside the cylinder from the opening hole. It is possible to avoid leaking to.
- the inner diameter of the suction pipe and the inner diameter of the connecting pipe are the same, and the inner diameter of the main pipe and the inner diameter of the connecting pipe are the suction. It may be larger than the inner diameter of the flow path.
- the inner diameters of the main pipe and the connecting pipe, which form the flow paths of the refrigerant supplied into the suction flow paths of the plurality of cylinders, can be made larger than the inner diameters of the suction flow paths of the cylinders. Refrigerant can be supplied to each compression chamber, and the compression efficiency can be improved.
- the inner diameter of the suction flow path provided in the upper cylinder of the cylinders is the inner diameter of the suction flow path provided in the lower cylinder. It may be less than or equal to the inner diameter of the suction flow path.
- vibration can be reduced by reducing the thickness of the separator plate without lowering the compression efficiency.
- FIG. 1 is a vertical cross-sectional view showing the configuration of a rotary compressor according to the first embodiment of the present invention.
- FIG. 2 is a vertical cross-sectional view showing a configuration of a main part around a rotary compression portion of the rotary compressor shown in FIG.
- the rotary compressor according to the present embodiment (hereinafter, simply referred to as compressor 1) is a vertical closed rotary compressor used in, for example, an air conditioner or a refrigerating device.
- the compressor 1 includes a housing 2, a rotating shaft 3, an upper bearing 4A and a lower bearing 4B, an electric motor 5, a rotary compression unit 6, a scroll compression unit 10, and a suction pipe 7.
- the rotation axis 3 extends along an axis (rotation axis O described later).
- the upper bearing 4A and the lower bearing 4B rotatably support the rotating shaft 3 around the rotating axis O.
- the electric motor 5 rotates the rotating shaft 3.
- the rotary compression unit 6 compresses the refrigerant by the rotation of the rotating shaft 3.
- the suction pipe 7 makes it possible to introduce the refrigerant into the compression chambers 63A and 63B of the rotary compression unit 6.
- the compressor 1 of the present embodiment is a two-stage compressor further including a scroll compression unit 10 above the rotary compression unit 6, but the scroll compression unit 10 does not necessarily have to be provided.
- the central axis of the housing 2 and the rotation axis 3 are arranged on a common axis extending in the vertical direction (vertical direction), and this common axis is hereinafter referred to as a rotation axis O.
- the rotating shaft 3 is arranged so that the extending direction is the vertical direction, and is rotatably housed in the housing 2 around the rotating axis O.
- the housing 2 is a closed type and extends in the vertical direction, and houses a rotating shaft 3, bearings 4A and 4B, an electric motor 5, and a rotary compression unit 6.
- the housing 2 has a cylindrical main body portion 21, and an upper lid portion 22 and a lower lid portion 23 that close the upper and lower openings of the main body portion 21.
- the housing 2 has an opening 24 formed above the cylinders 60 (60A, 60B) at the lower part of the side wall.
- the suction pipe 7 is fixed to the opening 24 in a state of being inserted with the pipe axis direction oriented in the horizontal direction.
- An oil sump is formed at the bottom of the housing 2 by accumulating oil.
- the liquid level of the oil pool at the time of initial filling of oil is located above the rotary compression unit 6.
- the rotary compression unit 6 is driven in the oil pool.
- the upper lid portion 22 is provided with a discharge pipe 13 that penetrates the peripheral wall portion in the thickness direction and communicates with the inside of the housing 2.
- the discharge pipe 13 discharges the compressed refrigerant to the outside of the housing 2.
- the electric motor 5 is housed in a central portion of the housing 2 in the vertical direction.
- the electric motor 5 has a rotor 51 and a stator 52.
- the rotor 51 is fixed to the outer peripheral surface of the rotating shaft 3 and is arranged above the rotary compression unit 6.
- the stator 52 is arranged so as to surround the outer peripheral surface of the rotor 51, and is fixed to the inner surface 21a of the main body 21 of the housing 2.
- a power supply (not shown) is connected to the electric motor 5 via the terminal 9.
- the electric motor 5 rotates the rotating shaft 3 by the electric power from the power source.
- the upper bearing 4A and the lower bearing 4B are arranged so as to sandwich the rotary compression portion 6 from above and below.
- the upper bearing 4A and the lower bearing 4B are each formed of, for example, a metal material, and are fixed to the cylinder 60 constituting the rotary compression portion 6 by, for example, bolting. Further, the upper bearing 4A is fixed to the housing 2.
- the rotary shaft 3 is rotatably supported by the housing 2 around the rotary axis O by the upper bearing 4A and the lower bearing 4B.
- the rotary compression unit 6 is arranged at the bottom of the housing 2 below the electric motor 5 to compress the refrigerant.
- the rotary compression unit 6 has a plurality of (two in this embodiment) disc-shaped cylinders 60 (60A, 60B), an eccentric shaft portion 61, and a piston rotor 62.
- the two cylinders 60A and 60B are vertically arranged in the housing 2 along the rotation axis O direction, respectively.
- the cylinder located on the upper side is referred to as an upper cylinder 60A
- the cylinder located on the lower side is referred to as a lower cylinder 60B.
- Compression chambers 63A and 63B are formed inside the cylinders 60A and 60B, respectively.
- the compression chambers 63A and 63B accommodate the piston rotor 62.
- the separator plate 69 is arranged between the cylinders 60A and 60B so as to be sandwiched vertically by the cylinders 60A and 60B.
- the separator plate 69 separates the compression chambers 63A and 63B from each other.
- the upper cylinder 60A and the lower cylinder 60B have suction holes 64, 65 (in a position facing the opening 24 in top view) communicating with the compression chambers 63A, 63B in the cylinders 60A, 60B via the suction pipe 7.
- the suction flow path is formed.
- the suction holes 64 and 65 are opened on the outer peripheral surfaces of the cylinders 60A and 60B, so that the cylinders 60A and 60B are formed with opening holes 60x.
- the eccentric shaft portion 61 is provided at the lower end portion of the rotating shaft 3, and is provided inside the piston rotor 62 in a state of being offset in a direction orthogonal to the central axis of the rotating shaft 3.
- the piston rotor 62 is arranged inside the cylinder 60 in a cylindrical shape having an outer diameter smaller than the inner diameter of the cylinder 60, and the eccentric shaft portion 61 is inserted and fixed to the eccentric shaft portion 61.
- the piston rotor 62 rotates eccentrically with respect to the rotation axis O as the rotation shaft 3 rotates.
- the suction holes 64 and 65 are holes for allowing the refrigerant to flow into the cylinders 60A and 60B.
- the rotary compression unit 6 is provided with a discharge hole (not shown). Through this discharge hole, the refrigerant compressed by the rotary compression unit 6 is discharged into the internal space that is the intermediate pressure of the housing 2, that is, the space above the cylinders 60A and 60B.
- the suction pipe 7 is arranged above the upper cylinder 60A, and includes a main pipe 70 extending in the radial direction of the rotating shaft 3 and penetrating the housing 2, and a connecting pipe 71 extending downward from the inner end 70a in the housing 2 of the main pipe 70. ,have.
- the upper end 71a of the connecting pipe 71 is connected to the inner end 70a of the main pipe 70.
- the connecting pipe 71 is arranged between the upper cylinder 60A and the lower cylinder 60B so as to be parallel to the rotation axis O on the radial outer side of each of the compression chambers 63A and 63B.
- the inner end 70a of the main pipe 70 is inserted into the radial outer end of the upper bearing 4A.
- the connecting pipe 71 extends downward from the inner end 70a of the main pipe 70 through the inside of the upper bearing 4A.
- connection pipe 71 is provided with a through hole 71b that penetrates in the radial direction so as to communicate with each of the suction holes 64 and 65.
- the through hole 71b is arranged on the axis of each of the suction holes 64 and 65.
- a sealing plug 72 for sealing the suction holes 64 and 65 is fitted in the opening hole 60x at the radial outer end of the suction holes 64 and 65.
- the sealing stopper 72 is, for example, a metal screw or the like.
- the inner diameter d1 of the main pipe 70 is set to be larger than the thicknesses t1 and t2 of the cylinders 60A and 60B, respectively. Further, the inner diameter d1 of the main pipe 70 and the inner diameter d2 of the connecting pipe 71 have the same diameter, and the inner diameters d1 and the inner diameter d2 are larger than the inner diameters d3 and d4 of the suction holes 64 and 65, respectively. Further, the inner diameter d3 of the upper suction hole 64 provided in the upper cylinder 60A may be set to be equal to or less than the inner diameter d4 of the lower suction hole 65 provided in the lower cylinder 60B.
- the refrigerant flows from the main pipe 70 of the suction pipe 7 to the compression chambers 63A and 63B which are the internal spaces of the cylinder 60 via the connection pipe 71 and the suction holes 64 and 65 of the cylinders 60A and 60B. Be supplied. Then, due to the eccentric movement of the piston rotor 62, the volumes of the compression chambers 63A and 63B are gradually reduced to compress the refrigerant. Discharge holes (not shown) for discharging the refrigerant are formed at predetermined positions of the cylinders 60A and 60B, and a lead valve (not shown) is provided in the discharge holes.
- the reed valve is pushed open and the refrigerant is discharged to the outside of the cylinders 60A and 60B.
- the discharged refrigerant is further compressed by the scroll compression unit 10 and then discharged from a discharge pipe 13 provided in the upper part of the housing 2 to an external pipe (not shown).
- a main pipe 70 is arranged above each of the cylinders 60A and 60B, and communicates with each other via a connecting pipe 71 and suction holes 64 and 65. Can be connected. That is, the refrigerant can be sucked into each of the compression chambers of the two cylinders 60A and 60B by using one suction pipe 7.
- each of the compression chambers 63A and 63B is not directly connected by the connecting pipe 71. Therefore, the refrigerant can be sucked into the respective compression chambers 63A and 63B by one suction pipe 7 without lowering the compression efficiency.
- the inner diameter d1 of the main pipe 70 becomes the thickness of the cylinders 60A and 60B and the separator plate 69.
- the inner diameter d2 of the connecting pipe 71 is not limited to the thicknesses of the cylinders 60A and 60B and the separator plate 69. As a result, the inner diameters d1 and d2 of the main pipe 70 and the connecting pipe 71 can be increased.
- the inner diameter d1 of the main pipe 70 of the suction pipe 7 and the inner diameter d2 of the connecting pipe 71 are provided to have the same diameter, and are set larger than the inner diameters of the suction holes 64 and 65, respectively. As a result, more refrigerant can be compressed and the compression efficiency can be improved.
- the refrigerant can be efficiently supplied from one suction pipe 7 to the compression chambers 63A and 63B of the pair of cylinders 60A and 60B.
- the flow can be divided and the compression efficiency can be improved.
- a processing tool such as a drill into the outer peripheral surfaces of the cylinders 60A and 60B from the outside in the radial direction
- lateral holes are machined in the cylinders 60A and 60B to form suction holes 64, 65 can be formed.
- the opening hole 60x is sealed by the sealing plug 72 after the processing of the horizontal hole, the refrigerant supplied from the main pipe 70 and flowing through the connecting pipe 71 does not go to the compression chambers 63A and 63B, but the cylinder 60A. , It is possible to prevent the outflow from 60B.
- the upper cylinder 60A is compressed among the refrigerants flowing in the suction pipe 7. A large amount of refrigerant is not supplied to the chamber 63A. Therefore, the refrigerant can be sufficiently supplied to the compression chamber 63B of the lower cylinder 60B, it is possible to prevent the supply amount of the refrigerant from being insufficient to the lower cylinder 60B, and it is possible to avoid a decrease in the compression efficiency.
- the twin rotary type compressor 1 having two cylinders 60A and 60B is targeted, but the compressor 1 is not limited to the twin rotary type and has more cylinders. You may.
- the main pipe 70 of the suction pipe 7 is arranged above the cylinders 60A and 60B and extends in the radial direction of the rotating shaft 3 to communicate with the compression chambers 63A and 63B, but the main pipe 70 is a cylinder. It may be arranged below 60A and 60B.
- the inner diameter d1 of the main pipe 70, the inner diameter d2 of the connecting pipe 71, the inner diameters d3 and d4 of the suction holes 64 and 65 of the cylinders 60A and 60B, and the thicknesses t1 and t2 of the cylinders 60A and 60B are set in each part.
- the inner diameter d1 of the main pipe 70 is not limited to be larger than the thickness of the cylinders 60A and 60B.
- the inner diameter d1 of the main pipe 70 and the inner diameter d2 of the connecting pipe 71 are provided to have the same diameter, and the inner diameters d1 and d2 are not limited to be larger than the inner diameters of the suction holes 64 and 65. Further, the inner diameter d3 of the suction hole 64 provided in the upper cylinder 60A is not limited to be equal to or less than the inner diameter d4 of the suction hole 65 provided in the lower cylinder 60B.
- the suction holes 64 and 65 are provided, and the sealing plug 72 is provided in the opening holes 60x of the suction holes 64 and 65, but the opening holes 60x and the sealing plug 72 are not provided.
- Refrigerant flow paths that connect the connection pipe 71 and the compression chambers 63A and 63B may be formed in the cylinders 60A and 60B.
- the configuration such as, size, etc. can be set to an appropriate configuration.
- vibration can be reduced without lowering the compression efficiency.
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- Applications Or Details Of Rotary Compressors (AREA)
Abstract
Description
しかしながら特許文献1のシングルシリンダ構造に適用されているように、1本の吸入管をシリンダの内周面の内側に接続する構成をツインシリンダにそのまま適用し、ツインシリンダを貫通するように1本の吸入管を接続して冷媒を吸入させた場合には、ツインシリンダのうちの一方のシリンダの吸入室と他方のシリンダの圧縮室とが直接繋がってしまうことから、圧縮効率が低下するという問題がある。
(1)本発明の一態様に係るロータリ圧縮機は、軸線に沿って延びる回転軸と、該回転軸を軸線回りに回転可能に支持する軸受と、前記回転軸を回転させるモータと、前記回転軸の回転によって冷媒を圧縮するロータリ圧縮部と、前記回転軸、前記軸受、前記モータ、及び前記ロータリ圧縮部を収容するハウジングと、前記ロータリ圧縮部の圧縮室に冷媒を導入可能な吸入管と、を備え、前記ロータリ圧縮部は、前記圧縮室を形成し上下方向に並んで配置される複数のシリンダと、前記複数のシリンダ同士の間に配置されたセパレータプレートと、を有し、前記吸入管は、前記シリンダの上方、又は下方に配置されて前記ハウジングを前記回転軸の径方向に貫通して延びる主管と、前記主管に接続されて前記回転軸の軸線方向に延びて、前記複数のシリンダにおける前記圧縮室の前記径方向外側で、前記複数のシリンダの間にわたって配置され、各々の前記圧縮室に連通している接続管と、を有する。
また上記態様に係るロータリ圧縮機によれば、複数のシリンダの上方、又は下方に吸入管の主管を配置することで主管の内径がシリンダの厚みに制限されることがなく、主管の内径を大きくすることが可能となる。また接続管について内径を大きくすることが可能となる。よってより多くの冷媒を圧縮することができ、圧縮効率を向上させることができる。
本実施形態の圧縮機1は、ロータリ圧縮部6の上方にスクロール圧縮部10をさらに備える二段圧縮機であるが、スクロール圧縮部10は必ずしも設けられなくともよい。
電動モータ5には、端子9を介して不図示の電源が接続されている。電動モータ5は、この電源からの電力によって回転軸3を回転させる。
また上部軸受4Aは、ハウジング2に固定されている。回転軸3は、上部軸受4Aと下部軸受4Bによって回転軸線O回りに回転自在にハウジング2に支持されている。
各シリンダ60A、60Bの内部には、それぞれ圧縮室63A、63Bが形成されている。圧縮室63A、63Bは、ピストンロータ62を収容している。
また、各シリンダ60A、60Bによって上下に挟まれるようにして、シリンダ60A、60B同士の間にセパレータプレート69が配置されている。セパレータプレート69は圧縮室63A、63B同士を仕切っている。
なお、ロータリ圧縮部6には、図示しない吐出孔が設けられている。この吐出孔を通じて、ハウジング2の中間圧とされた内部空間、即ちシリンダ60A、60Bの上方の空間にロータリ圧縮部6で圧縮された冷媒が吐出される。
主管70の内端70aは、上部軸受4Aの径方向外側の端部に差し込まれている。接続管71は、主管70の内端70aから上部軸受4Aの内部を貫通して下方に延びている。
さらに、上シリンダ60Aに設けられる上吸入孔64の内径d3は、下シリンダ60Bに設けられる下吸入孔65の内径d4以下に設定されていてもよい。
そして、ピストンロータ62の偏心運動により、圧縮室63A、63Bの容積が徐々に減少して冷媒が圧縮される。各シリンダ60A、60Bの所定の位置には、冷媒を吐出する吐出穴(図示省略)が形成されており、この吐出穴にはリード弁(図示省略)が備えられている。これにより、圧縮された冷媒の圧力が高まると、リード弁を押し開き、冷媒をシリンダ60A、60Bの外部に吐出する。吐出された冷媒は、スクロール圧縮部10でさらに圧縮された後にハウジング2の上部に設けられた吐出管13から外部の図示しない配管に吐出されるようになっている。
本実施形態による圧縮機1では、図1及び図2に示すように、シリンダ60A、60Bのそれぞれに対して、上方に主管70を配置し、接続管71及び吸入孔64、65を介して連通させて接続することができる。即ち1本の吸入管7を用いて、二つのシリンダ60A、60Bの圧縮室の各々に冷媒を吸入させることができる。
しかし本実施形態では、吸入管7を1本のみにできるため、セパレータプレート69の厚みを薄くすることが可能である。この結果、2つのシリンダ60A、60B同士の距離を近づけることが可能となり、ピストンロータ62の偏心運動による振動を低減可能である。
すなわち、主管70の内径d1がシリンダ60A、60Bの厚みよりも大きいことに限定されない。また、主管70の内径d1と接続管71の内径d2とが同径で設けられ、内径d1、d2が吸入孔64、65の内径よりも大きいことに限定されない。また上シリンダ60Aに設けられる吸入孔64の内径d3が、下シリンダ60Bに設けられる吸入孔65の内径d4以下であることに限定されることはない。
2 ハウジング
3 回転軸
4A 上部軸受
4B 下部軸受
5 電動モータ
6 ロータリ圧縮部(圧縮部)
7 吸入管
9 端子
10 スクロール圧縮部
21 本体部
60 シリンダ
60x 開口穴
60A 上シリンダ
60B 下シリンダ
61 偏心軸部
62 ピストンロータ
63A、63B 圧縮室
64、65 吸入孔
69 セパレータプレート
70 主管
71 接続管
71a 上端
71b 貫通孔
72 封止栓
O 回転軸線(軸線)
Claims (6)
- 軸線に沿って延びる回転軸と、
該回転軸を軸線回りに回転可能に支持する軸受と、
前記回転軸を回転させるモータと、
前記回転軸の回転によって冷媒を圧縮するロータリ圧縮部と、
前記回転軸、前記軸受、前記モータ、及び前記ロータリ圧縮部を収容するハウジングと、
前記ロータリ圧縮部の圧縮室に冷媒を導入可能な吸入管と、
を備え、
前記ロータリ圧縮部は、
前記圧縮室を形成し上下方向に並んで配置される複数のシリンダと、
前記複数のシリンダ同士の間に配置されたセパレータプレートと、
を有し、
前記吸入管は、
前記シリンダの上方、又は下方に配置されて前記ハウジングを前記回転軸の径方向に貫通して延びる主管と、
前記主管に接続されて前記回転軸の軸線方向に延びて、前記複数のシリンダにおける前記圧縮室の前記径方向外側で、前記複数のシリンダの間にわたって配置され、各々の前記圧縮室に連通している接続管と、
を有するロータリ圧縮機。 - 前記吸入管の内径は、前記シリンダの厚みよりも大きい請求項1に記載のロータリ圧縮機。
- 前記複数のシリンダの各々には、前記径方向に延びるとともに各々の前記圧縮室と前記接続管とを連通する吸入流路が設けられている請求項1又は2に記載のロータリ圧縮機。
- 前記吸入流路は前記シリンダの外周面に開口することで前記シリンダには開口穴が設けられ、
前記開口穴には封止栓が設けられている請求項3に記載のロータリ圧縮機。 - 前記主管の内径と前記接続管の内径とは同径であり、前記主管の内径及び前記接続管の内径は前記吸入流路の内径よりも大きい請求項3又は4に記載のロータリ圧縮機。
- 前記シリンダのうち上側の前記シリンダに設けられる前記吸入流路の内径は、下側の前記シリンダに設けられる前記吸入流路の内径以下である請求項3から5のいずれか1項に記載のロータリ圧縮機。
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP19925955.7A EP3951181B8 (en) | 2019-04-25 | 2019-04-25 | Rotary compressor |
| PCT/JP2019/017646 WO2020217385A1 (ja) | 2019-04-25 | 2019-04-25 | ロータリ圧縮機 |
| JP2021515410A JP7539372B2 (ja) | 2019-04-25 | 2019-04-25 | ロータリ圧縮機 |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2019/017646 WO2020217385A1 (ja) | 2019-04-25 | 2019-04-25 | ロータリ圧縮機 |
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Family
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| PCT/JP2019/017646 Ceased WO2020217385A1 (ja) | 2019-04-25 | 2019-04-25 | ロータリ圧縮機 |
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| EP (1) | EP3951181B8 (ja) |
| JP (1) | JP7539372B2 (ja) |
| WO (1) | WO2020217385A1 (ja) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4080056A3 (en) * | 2021-04-22 | 2022-11-09 | Mitsubishi Heavy Industries Thermal Systems, Ltd. | Compressor |
| WO2024111342A1 (ja) | 2022-11-25 | 2024-05-30 | 三菱重工サーマルシステムズ株式会社 | 圧縮機 |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7662954B2 (ja) * | 2023-03-31 | 2025-04-16 | ダイキン工業株式会社 | 2シリンダロータリー圧縮機 |
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- 2019-04-25 JP JP2021515410A patent/JP7539372B2/ja active Active
- 2019-04-25 EP EP19925955.7A patent/EP3951181B8/en active Active
- 2019-04-25 WO PCT/JP2019/017646 patent/WO2020217385A1/ja not_active Ceased
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| JPH08270580A (ja) * | 1995-03-31 | 1996-10-15 | Sanyo Electric Co Ltd | 密閉型回転圧縮機 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4080056A3 (en) * | 2021-04-22 | 2022-11-09 | Mitsubishi Heavy Industries Thermal Systems, Ltd. | Compressor |
| JP7645698B2 (ja) | 2021-04-22 | 2025-03-14 | 三菱重工サーマルシステムズ株式会社 | 圧縮機 |
| WO2024111342A1 (ja) | 2022-11-25 | 2024-05-30 | 三菱重工サーマルシステムズ株式会社 | 圧縮機 |
| EP4621241A1 (en) | 2022-11-25 | 2025-09-24 | Mitsubishi Heavy Industries Thermal Systems, Ltd. | Compressor |
Also Published As
| Publication number | Publication date |
|---|---|
| EP3951181A4 (en) | 2022-04-13 |
| EP3951181B8 (en) | 2025-11-05 |
| EP3951181A1 (en) | 2022-02-09 |
| JP7539372B2 (ja) | 2024-08-23 |
| EP3951181B1 (en) | 2025-09-24 |
| JPWO2020217385A1 (ja) | 2020-10-29 |
| EP3951181C0 (en) | 2025-09-24 |
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