JPH0765574B2 - Refrigeration apparatus using the scroll type compressor - Google Patents

Refrigeration apparatus using the scroll type compressor

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Publication number
JPH0765574B2
JPH0765574B2 JP1116690A JP11669089A JPH0765574B2 JP H0765574 B2 JPH0765574 B2 JP H0765574B2 JP 1116690 A JP1116690 A JP 1116690A JP 11669089 A JP11669089 A JP 11669089A JP H0765574 B2 JPH0765574 B2 JP H0765574B2
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Prior art keywords
pressure
scroll
gas
suction
spiral
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Expired - Fee Related
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JP1116690A
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Japanese (ja)
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JPH02294580A (en
Inventor
達也 今井
一成 新木
俊夫 泉谷
陽介 田中
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ダイキン工業株式会社
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Priority to JP1116690A priority Critical patent/JPH0765574B2/en
Publication of JPH02294580A publication Critical patent/JPH02294580A/en
Publication of JPH0765574B2 publication Critical patent/JPH0765574B2/en
Anticipated expiration legal-status Critical
Application status is Expired - Fee Related legal-status Critical

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C29/00Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/0007Injection of a fluid in the working chamber for sealing, cooling and lubricating
    • F04C29/0014Injection of a fluid in the working chamber for sealing, cooling and lubricating with control systems for the injection of the fluid
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C29/00Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/0007Injection of a fluid in the working chamber for sealing, cooling and lubricating

Description

【発明の詳細な説明】 (産業上の利用分野) 本発明は、スクロール形圧縮機を用いた冷凍装置に関する。 BACKGROUND OF THE INVENTION (FIELD OF THE INVENTION) The present invention relates to a refrigeration apparatus using the scroll type compressor.

(従来の技術) 従来、冷凍装置に組込まれるスクロール形圧縮機は、例えば特開昭63−167084号公報に開示され、且つ第4図に示すように、鏡板(M)(N)の中心部から外周部にかけて渦巻体(B)(C)を突設した固定及び可動スクロール(F)(O)を備え、駆動軸(K)並びに、その端部に一体化したカウタウエイト(W)、これに突設する駆動ピン(D)に嵌合されるスイングリンク(S)を介して前記可動スクロール(O)を固定スクロール(F) (Prior Art) Conventionally, scroll type compressor incorporated in a refrigeration apparatus, for example, is disclosed in JP 63-167084 discloses and as shown in FIG. 4, the central portion of the end plate (M) (N) with spiral element to the outer portion (B) (C) a projecting, fixed and movable scroll (F) (O) from the drive shaft (K) and, Kautaueito integrated with the end thereof (W), in which via said swing link (S) to be fitted to the projecting drive pin (D) a movable scroll (O) a fixed scroll (F)
に対し回動させ、渦巻外周側の吸入ポート(L)から吸入する冷媒ガスを渦巻体(B)(C)間に仕切られる圧縮室(A)で圧縮し、渦巻中心側の吐出ポート(H)から吐出するようにしている。 Is rotated with respect to the refrigerant gas sucked from the suction port of the spiral outer peripheral side (L) is compressed by the spiral body (B) (C) compression chamber partitioned between (A), a spiral center of the discharge port (H so that is discharged from).

尚、前記可動スクロール(O)は、スラスト軸受(P) Incidentally, the movable scroll (O) is a thrust bearing (P)
を介して架構(X)に載置され、又、前記渦巻体(B) It placed on Frame (X) through, and wherein the spiral body (B)
(C)と鏡板(X)(Y)との端面間には、加工誤差や部材の変形等を吸収するため所定の隙間が確保されている。 Between the end faces of the (C) and the end plate (X) (Y), a predetermined clearance for absorbing the deformation of the machining errors or member is secured. 又、スイングリンク(S)は、駆動ピン(D)に套嵌する軸受筒(G)の下部鍔部(E)により、その下面(Q)がカウンタウエイト(W)の頂面(U)に対し浮くように片持ち状に枢着され、又、他側に設ける規制孔(Z)に、カウンタウエイト(W)に突設するリミットピン(R)を遊嵌状に受け入れ、駆動ピン(D)を軸とした一定範囲にわたる揺動を可能にして、起動時の液圧縮で圧縮室(A)に異常高圧が発生した場合等に、渦巻体(B)(C)の壁面間に隙間を空けてその異常高圧を吸入ポート(L)側に逃がせるようにしている。 Also, the swing link (S) is by the lower flange portion of the bushing which fitted around the driving pin (D) (G) (E), on its lower face the top surface of the (Q) is a counterweight (W) (U) is pivotally mounted in a cantilever to float against, also, the restriction hole provided on the other side (Z), accepted limit pins projecting counterweight (W) the (R) loosely-shaped, the drive pin (D ) to allow the swing over a range with the shaft and the like when the abnormally high pressure occurs in the compression chamber (a) in liquid compression at startup, the clearance between the wall surface of the spiral body (B) (C) emptied and the Nigaseru so that abnormally high pressure in the intake port (L) side.

(発明が解決しようとする課題) ところで、上記圧縮機では、前記渦巻体(B)(C)と鏡板(M)(N)との端面間や、各部材の嵌合部分に形成された隙間により、本来可動スクロール(O)はスラスト軸受(P)上で傾き得るのであるが、通常運転時は、これに打ち勝ち、可動スクロール(O)に作用する遠心力(fm)と圧縮室(A)での内部圧力に基づく力の水平成分(fr)とで各渦巻体(B)(C)の壁面同士は密着され、かつ、前記内部圧力に基づく力の軸方向成分(fn)で鏡板(N)の裏面はスラスト軸受(P)に押圧されて、該可動スクロール(O)の平行度は保たれることになる。 Clearance way (0005), in the compressor, the or between the end surfaces of the spiral body (B) (C) and end plate (M) (N), which is defined in the engaging portion of each member Accordingly, although originally the movable scroll (O) is as it can tilt on the thrust bearing (P), during normal operation, overcomes thereto, the centrifugal force acting on the movable scroll (O) (fm) and the compression chamber (a) wall surfaces of the horizontal component of the force based on the internal pressure at (fr) and de each spiral body (B) (C) is in close contact, and the end plate in the axial direction component (fn) of the force based on the internal pressure (N ) the back surface of which is pressed against the thrust bearing (P), parallelism of the movable scroll (O) will be maintained.

しかし、例えば、顕著な一例としてこの圧縮機が組込まれる冷凍装置において蒸発器として作用していた熱交換器に付着した霜を除去するため冷媒流通経路を逆転させて霜の付着した熱交換器に高圧の吐出ガスを通じるというデフロスト運転を行う場合等には、吐出ポート(H) However, for example, a heat exchanger attached frost by reversing the refrigerant flow path to remove the frost on the heat exchanger which was acting as an evaporator in a refrigerating apparatus to which the compressor is incorporated as an example remarkable in the case or the like for defrosting operation that leads the high-pressure discharge gas, the discharge port (H)
側の高圧圧力が低下し、又、これに引きずられて吸入ポート(L)側の低圧圧力も低下するのであって、このように高圧圧力及び低圧圧力の低い条件下で運転を行う場合には、圧縮室(A)の内部圧力が低下して、前記各成分(fr,fn)は小さくなり、渦巻体(B)(C)間を密着させる径方向の接触力並びに、鏡板(N)をスラスト軸受(P)に押圧するスラスト方向の押圧力は弱くなってしまう。 Reduces the high pressure side, also, there is the drops low pressure in the suction port (L) side is dragged to this, when performing the operation in low conditions of this way high pressure and low pressure the internal pressure is reduced in the compression chamber (a), the respective components (fr, fn) is reduced, the spiral body (B) (C) the contact force in the radial direction to contact between and, the end plate (N) pressing force in the thrust direction for pressing the thrust bearing (P) becomes weaker.

このため、可動スクロール(O)は不安定な状態となって、第5図(イ)に示すように渦巻体(B)(C)間が離れ、又、同図(ロ)に示すように可動スクロール(O)に傾転現象が発生して、該可動スクロール(O) Therefore, the movable scroll (O) is an unstable state, FIG. 5 (b) shows as the spiral body (B) (C) between leaves, also as shown in FIG. (B) tilting phenomenon movable scroll (O) is generated, the movable scroll (O)
はすり鉢状に可動されてしまうことになり、各渦巻体(B)(C)が離れたり衝撃的に再接触したりして異常干渉音が発生し、又、渦巻体(B)(C)の信頼性が低下する等の問題が起こるのである。 Will be thus be movable in a bowl shape, each spiral body (B) (C) is or shock re contact or away abnormal interference sound is generated, also, the spiral body (B) (C) the problem happens is such that the reliability is lowered.

本発明は以上のような問題に鑑みてなしたもので、その目的は、低い圧力条件下で運転を行うような場合で、可動スクロールが傾転するおそれがある場合、渦巻体間に生じる衝撃的な干渉を緩和して異常音の発生等を防止できるスクロール形圧縮機を用いた冷凍装置を提供することにある。 The invention was made in view of the problems as described above, the impact that purpose, in case that perform driving at a low pressure conditions, when the movable scroll is likely to tilt, which occur between the spiral body and to provide a refrigeration apparatus using the scroll type compressor which can prevent the occurrence of interference mitigation to abnormal noise.

(課題を解決するための手段) 上記目的を達成するために、本発明では、鏡板(3a) To achieve (solutions for the problem) above object, the present invention, the end plate (3a)
(4a)の中心部から外周部にかけて渦巻体(3b)(4b) Spiral member to the outer portion from the center of (4a) (3b) (4b)
を突設した固定及び可動スクロール(3)(4)を密閉ケーシング(1)内に備え、渦巻外方側の吸入ポート(13)から吸入する低圧ガスを前記渦巻体(3b)(4b) The projecting, fixed and movable scroll (3) (4) provided in a closed casing (1) within the spiral body low pressure gas sucked from the suction port of the spiral outer side (13) (3b) (4b)
間に仕切られる圧縮室で圧縮し、渦巻中心側の吐出ポート(14)から高圧ガスを吐出するようにしたスクロール形圧縮機を用いた冷凍装置において、吸入ガス経路(2 Compressed in the compression chamber is partitioned between the refrigeration apparatus using the scroll type compressor which is adapted to discharge a high-pressure gas from the discharge port of the spiral central side (14), suction gas path (2
5)に、前記密閉ケーシング(1)外に吐出されたガス中の油又は液冷媒の注入路(24)を開口すると共に、前記スクロール形圧縮機の吐出側の高圧圧力又は吸入側の低圧圧力を検出する圧力検出手段(26)と、該検出手段(26)の検出値が設定値を越えるとき前記注入路(24) 5), wherein the closed casing (1) with an opening the injection passage of the oil or liquid refrigerant in the gas discharged to the outside (24), high pressure or suction side of the low pressure discharge side of the scroll type compressor pressure detecting means for detecting (26), said injection passage when the detected value of the detection means (26) exceeds a set value (24)
を閉じ、前記検出値が設定値を下回るとき開く開閉手段(27)とを設けたことを特徴とするものである。 Closed, it is characterized in that the detected value is provided to open and closing means (27) when below the set value.

(作用) 低圧力条件下で運転を行うような場合に、前記検出手段(26)の検出値が設定値を下回ったとき、つまり、前記可動スクロール(4)に傾転現象が発生する場合には、 If such perform driving in (action) low pressure conditions, when the detected value of said detecting means (26) falls below a set value, that is, if the tilting phenomenon occurs in the movable scroll (4) It is,
前記開閉手段(27)が開放されて、前記注入路(24)から前記密閉ケーシング(1)外に吐出された油又は液冷媒が圧縮室内へとインジェクションされ、前記各渦巻体(3b)(4b)間に油膜又は液膜が形成され、この油膜等が緩衝材としてはたらき、可動スクロール(4)の傾転による前記各渦巻体(3b)(4b)の衝撃的な干渉が緩和されて、異常音の発生等が低減化される。 Said opening and closing means (27) is opened, the injection path the closed casing from (24) (1) oil or liquid refrigerant discharged to the outside is injected into the compression chamber, wherein the spiral body (3b) (4b ) oil film or a liquid film is formed between, the oil film or the like serves as a buffer, is shocking interference mitigation of the respective spiral body by tilting of the movable scroll (4) (3b) (4b), abnormal generation of sound is reduced. この際、圧縮室内ヘインジェクションされる油又は液冷媒は、一旦密閉ケーシング外へ吐出されたものであるため、油又は液冷媒は比較的低温であり、吸入ガス加熱が小さくてすみ、圧縮機の効率低下を招くことがない。 At this time, the oil or the liquid refrigerant is compressed chamber F Injection, since they are once discharged to the sealed casing outside, oil or liquid refrigerant is relatively low, only a small suction gas heating, the compressor It does not lead to a decrease in efficiency.

(実施例) 第2図は、冷凍装置に使用するスクロール形圧縮機(10 (Example) FIG. 2, a scroll type compressor for use in refrigeration apparatus (10
0)を示しており、密閉ケーシング(1)の内方上部に、架構(2)を介して、円板形状の鏡板(3a)に渦巻体(3b)を突設した固定スクロール(3)と、同じく鏡板(4a)に渦巻体(4b)を突設した可動スクロール(4)とをそれぞれ噛合状態で上下対設すると共に、前記ケーシング(1)の内方下部側には、駆動軸(5)をもったモータ(6)を配設している。 Indicates a 0), inwardly upper part of the closed casing (1), via the Frame (2), spiral body end plate of disc-shaped (3a) and (projected to 3b), fixed scroll (3) , also with up and down pairs set an end plate movable scroll (4) projecting from (4a) to the spiral body (4b) respectively meshed state, the inside lower portion of the casing (1), the drive shaft (5 ) are disposed motor (6) having.

前記各渦巻体(3b)(4b)は、前記各鏡板(3a)(4a) Wherein each spiral body (3b) (4b), the respective end plate (3a) (4a)
の中心部から外周部にかけて所定のインボリュート形状に合致する螺旋形状に形成し、前記各渦巻体(3b)(4 Center is formed in a spiral shape that matches the predetermined involute shape to the outer portion from the respective spiral body (3b) (4
b)の突出先端側には、それぞれ前記各鏡板(3a)(4 The projecting distal end of b), respectively each end plate (3a) (4
a)との間に形成される隙間を埋めるチップシール(3 Tip seal (3 to fill the gap formed between the a)
c)(4c)を嵌合している。 c) it is fitted to (4c).

また、前記固定スクロール(3)は、前記架構(2)の上部取付面に、固定ボルト(B)を介して固定支持し、 Further, the fixed scroll (3), to the upper mounting surface of the Frame (2), fixed support through the fixing bolt (B),
一方、前記可動スクロール(4)は、前記架構(2)の上部に設けたスラスト軸受(2a)を介して回動自由に支持している。 Meanwhile, the movable scroll (4) is rotated are freely supported via a thrust bearing (2a) provided in the upper portion of the Frame (2).

そして、前記駆動軸(5)の上端部に一体に設けたカウンタウエイト(7)と、このカウンタウエイト(7)に従動されるスイングリンク(8)、並びに自転防止機構を構成するオルダムリング(9)とを介して、前記可動スクロール(4)を固定スクロール(3)に対し公転駆動させ、前記各渦巻体(3b)(4b)間に形成される二系統の圧縮室(11)(12)で冷媒の圧縮を行うようにしている。 Then, the drive shaft and counterweight provided integrally with the upper portion of (5) (7), the Oldham ring (9 counterweight (7) to the swing link to be driven (8), and that constitutes a rotation preventing mechanism ) and through said movable scroll (4) the fixed scroll (3) with revolving driven to the said respective spiral body (3b) (4b) two systems of compression chambers formed between (11) (12) in which to perform the compression of the refrigerant.

同図中、(13)は前記各渦巻体(3b)(4b)の外周側に設けた吸入ポート、(14)は前記固定スクロール(3) In the figure, (13) the respective spiral body (3b) suction port provided on the outer peripheral side of (4b), (14) the fixed scroll (3)
の中心部に開設した吐出ポート、(15)は該吐出ポート(14)に配設した逆止弁である。 Discharge port opened in the center of, (15) is a check valve which is disposed in the port (14) out said discharge.

第1図は、以上の圧縮機(100)を用いた冷凍装置を示しており、この圧縮機(100)のケーシング(1)に接続した吐出管(16)と吸入管(17)との間に四路切換弁(19)を介装して、室内空調等に用いる利用側熱交換器(20)、並びに冷房用膨張機構(21a)、受液器(3 Figure 1 shows a refrigeration apparatus using the above compressor (100), between the discharge pipe connected to the casing (1) of the compressor (100) and (16) and suction pipe (17) and interposed four-way switching valve (19) to the utilization side heat exchanger used in the indoor air conditioning, etc. (20), and cooling expansion mechanism (21a), receiver (3
0)、暖房用膨張機構(21b)、室外設置の熱源側熱交換器(22)をそれぞれ接続している。 0), the heating expansion mechanism (21b), and the outdoor installation of the heat source side heat exchanger (22) connected respectively. 又、前記吐出管(1 Further, the discharge pipe (1
6)と四路切換弁(19)との間の高圧ガス経路(18)には、油分離器(40)を介装してる。 The high-pressure gas passage (18) between 6) and the four-way selector valve (19) is interposed oil separator (40). 尚、図中、(21c) In FIG, (21c)
は暖房時に冷房用膨張機構(21a)を側路する逆止弁、 Check valve cooling expansion mechanism (21a) to the side road at the time of heating is,
(21d)は冷房時に暖房用膨張機構(21b)を側路する逆止弁である。 (21d) is a check valve bypasses the heating expansion mechanism (21b) during the cooling.

そして、暖房時は、同図実線矢印の経路で吐出ガスを循環させて、前記利用側熱交換器(20)を凝縮器として又前記熱源側熱交換器(22)を蒸発器として作用させる一方、冷房時や、前記した暖房時に熱源側熱交換器(22) Then, during the heating, while to act as an evaporator by circulating the discharge gas in the path of the drawing the solid arrow, or the heat source-side heat exchanger as a condenser and the utilization side heat exchanger (20) (22) , cooling time and the heat source side heat exchanger during the heating (22)
が着霜しそのデフロスト運転を行う場合には、前記四路切換弁(19)の切換操作により、同図点線矢印で示す逆の経路で吐出ガスを循環させて、前記熱源側熱交換器(22)を凝縮器として又前記利用側熱交換器(20)を蒸発器として作用させるようにしている。 There when to perform the defrosting operation is frosted, the switching operation of the four-way selector valve (19), by circulating the discharge gas in the reverse path shown in FIG dotted arrow, the heat source-side heat exchanger ( and so as to act as also the use side heat exchanger 22) as a condenser (20) the evaporator. この場合、前記デフロスト運転時には、高圧の吐出ガスが着霜した前記熱源側熱交換器(22)に供給されるため、該吐出ガスの圧力が低下し、これに引きずられて低圧の吸入ガス圧力も低下されることになる。 In this case, wherein the defrost operation, to be supplied to the heat source-side heat exchanger high pressure discharge gas is frosted (22), reduces the pressure of said discharge outlet gas, dragged thereto suction gas pressure of the low pressure It will also be reduced.

しかして、以上の構成において、前記油分離器(40)の底部に注入路(24)の入口側を接続すると共に、該注入路(24)の出口側を、第2図に明示するように、継手管(24a)を介して前記圧縮器(100)のケーシング(1) Thus, in the above configuration, the connecting inlet side of the injection path (24) in the bottom of the oil separator (40), the outlet side of the injection path (24), as best shown in Figure 2 , joint pipe the compressor via (24a) of the (100) casing (1)
に固定し、その内部側をL字形の内部管(24b)により、前記吸入管(17)から前記圧縮室(11)(12)に至る吸入ガス経路(25)、詳しくは前記吸入ポート(13) Fixed to, the inner tube of the inner side L-shape (24b), the said compression chamber from the suction pipe (17) (11) the suction gas passage (25) leading to (12), specifically the intake port (13 )
に対応して前記架構(2)に形成する吸入路(25a)に上方に指向させて開口し、前記ケーシング(1)外に吐出されたガスを前記油分離器(40)で分離し、該分離した油を吸入ガスに積極的に含ませるようにする。 Is directed upwardly open, separating the casing (1) is discharged outside the gas by the oil separator (40) to the suction passage (25a) to be formed on the Frame (2) in response to, the so as to include aggressively separated oil to the suction gas.

又、通常の運転とデフロスト運転等の低圧力条件下での運転とを判別するため、第1図に示すように、前記吐出ガス経路(18)に、高圧圧力を検出する圧力検出手段(26)を介装する。 Further, in order to determine the operation of the low-pressure conditions, such as normal operation and defrosting operation, as shown in FIG. 1, the discharge gas passage (18), pressure detecting means for detecting a high pressure (26 ) is interposed. 尚、高圧圧力が低下すればほとんどの場合これにひきずられて吸入側の低圧圧力も低下するため、高圧圧力検出に代えて、低圧圧力を検出するようにしてもよい。 Since the high pressure also drops low pressure thereto dragged by the suction side in most cases be reduced, instead of the high pressure detection, it may be detected a low pressure.

更に、通常運転時のように所定の圧力が確保され傾転が問題とならない場合には油注入による油上がり量の増加を防止するため、前記検出手段(26)の検出値が設定値を越える場合には前記注入路(24)を閉じ、前記検出値が設定値を下回るとき前記注入路(24)を開く開閉手段(27)を設ける。 Further, when the tilt is secured a predetermined pressure so that the normal operation is not a problem to prevent an increase in the oil rising amount by the oil injection, the detected value of said detecting means (26) exceeds the set value closing said injection channel (24) when the detected value is open to the injection path (24) when below the set value is provided an opening and closing means (27). この開閉手段(27)は電磁弁等で構成され、制御器(28)を介して開閉される。 The opening and closing means (27) is constituted by an electromagnetic valve or the like, it is opened and closed via the controller (28).

斯くして、デフロスト運転を行った場合など、吐出ガス圧力が所定の設定値以下となった場合、前記注入路(2 Thus to, such as when performing the defrosting operation, if the discharge gas pressure is equal to or less than a predetermined set value, said injection passage (2
4)が開かれて、前記油分離器(40)から吸入ガスに油が注入され、前記各渦巻体(3b)(4b)の接触部に油膜が形成されて、この油膜が緩衝材としてはたらき、前記各渦巻体(3b)(4b)間の衝撃的な干渉を緩和できるのである。 4) is opened work oil to the suction gas from the oil separator (40) is injected, the are oil film formed on the contact portion of the spiral body (3b) (4b), the oil film as a buffer the it can mitigate the shock interference between the spiral body (3b) (4b).

以上の実施例では、油注入によったが、その他、第3図に示すように、ケーシング(1)外に吐出されたガス中の液冷媒を前記受液器(30)の貯え、この貯えられた高圧液冷媒を注入路(24)を介して吸入ガス経路(25)の注入してもよく、この場合には、液状の冷媒が各渦巻体(3b)(4b)間に液膜をつくって緩衝材として作用することになる。 In the above embodiment, although due to the oil injection, other, as shown in FIG. 3, stored in the casing (1) wherein the liquid refrigerant in the gas discharged outside the receiver (30), the stored was high-pressure liquid refrigerant injection channel (24) may be injected in the intake gas passage (25) via, in this case, the liquid refrigerant is the spiral body (3b) (4b) liquid film between It will act as a buffer to make. この場合においても、通常運転時のように所定の圧力が確保され傾転が問題とならない場合には液冷媒の注入による液圧縮等を防止するため、前記検出手段(26)の検出値が設定値を越える場合には前記注入路(24)を閉じ、前記検出値が設定値を下回るとき前記注入路(24)を開く開閉手段(27)を設ける。 Also in this case, since if the tilting is secured a predetermined pressure so that the normal operation is not a problem to prevent the liquid compression or the like by injection of the liquid refrigerant, the detection value of said detecting means (26) is set when exceeding the value closes the injection path (24), the detected value to open the injection channel (24) when below the set value is provided an opening and closing means (27). この開閉手段(27)は電磁弁等で構成され、制御器(28)を介して開閉される。 The opening and closing means (27) is constituted by an electromagnetic valve or the like, it is opened and closed via the controller (28).

尚、第3図の実施例では、固定スクロール(3)の鏡板(3a)における吸入ポート(13)近くに注入口(24c) In the embodiment of Figure 3, the fixed scroll (3) the suction port (13) in the end plate (3a) near the injection port (24c)
を開口し、この注入口(24c)とケーシング(1)のトップに取付けた継手管(24a′)との間を内部管(24 The open, inner tube (24 between the inlet and (24c) fitting tube attached to the top of the casing (1) and (24a ')
b′)を介して接続している。 b ') via a connected. この他、前記注入路(2 In addition, the injection path (2
4)は、第2図と同様に吸入路(25a)や、又、吸入管(17)に開口してもよく、この場合には、吸入ガスが湿り状態となって、間接的に前記各渦巻体(3b)(4b)間に液膜を形成することになる。 4), the intake passage as in the second FIG (25a) and, also, may be open to the suction pipe (17), in this case, in a state the suction gas is wet, indirectly each will form a liquid film between the spiral body (3b) (4b).

(発明の効果) 以上説明したように、本発明では、吸入ガス経路(25) As it has been described (Effect of the Invention) In the present invention, suction gas path (25)
に、密閉ケーシング(1)外に吐出されたガス中の油又は液冷媒の注入路(24)を開口すると共に、スクロール形圧縮機の吐出側の高圧圧力又は吸入側の低圧圧力を検出する圧力検出手段(26)と、この検出手段(26)の検出値が設定値を越えるとき前記注入路(24)を閉じ、前記検出値が設定値を下回るとき開く開閉手段(27)とを設けたから、可動スクロール(4)に傾転現象が発生する低圧力条件下で運転を行うようなときには、前記開閉手段により開かれた注入路(24)から、一旦密閉ケーシング外へ吐出されたガス中の比較的低温の油又は液冷媒が吸入ガス経路に注入され、この注入される油又は液冷媒により各渦巻体(3b)(4b)間に油膜又は液膜を形成できるので、この油膜等により前記各渦巻体(3b)(4 In, while opening the closed casing (1) injection path of the oil or liquid refrigerant in the gas discharged to the outside (24), pressure detecting low pressure in the high pressure or suction side of the discharge side of the scroll type compressor and detection means (26), the detected value is close to the injection path (24) when exceeding the set value of the detection means (26), because the detected value is provided and closing means for opening when below the set value (27) , when in low pressure conditions which tilting phenomenon occurs in the movable scroll (4), such as performing the operation, the injection passage (24) opened by said opening and closing means, in discharged into the sealed casing outside the gas once relatively low temperature of the oil or the liquid refrigerant is injected into the intake gas passage, since an oil film or liquid film can be formed between the spiral body by oil or liquid refrigerant is the injected (3b) (4b), wherein this oil film or the like each spiral body (3b) (4
b)の衝撃的な干渉を緩和できて、異常音の発生等が低減できるし、しかも注入される油又は液冷媒が比較的低温であるため、吸入ガス加熱が小さく、圧縮機の効率の低下を軽減できるのであり、それでいながら所定の圧力が確保され傾転が問題とならない通常運転時には、前記開閉手段により注入路(24)が閉じられて、油又は液冷媒が吸入ガス経路に注入されることがないので、油上がり量の増加、または、液圧縮を招くことがないのである。 Able reduce the impact interference of b), to be reduced occurrence of abnormal sound, and since oil or liquid refrigerant is injected is relatively low, the suction gas heating is small, reduction in the efficiency of the compressor and as it can reduce, during normal operation the predetermined pressure without leaving in it not a tilting is secured issue, injection channel (24) is closed by said opening and closing means, the oil or the liquid refrigerant is injected to the intake gas passage since there is no Rukoto, increase of oil rising amount, or is there no causing liquid compression.

【図面の簡単な説明】 BRIEF DESCRIPTION OF THE DRAWINGS

第1図は本発明にかかるスクロール形圧縮機を用いた冷凍装置を示す配管図、第2図は同冷凍装置に使用されるスクロール形圧縮機の全体構造を示す一部省略縦断面図、第3図は他の実施例図面、第4図は従来例の断面図、第5図(イ)(ロ)はその問題点の説明図である。 Figure 1 is a pipe diagram showing a refrigeration apparatus using the scroll type compressor according to the present invention, FIG. 2 partially omitted longitudinal sectional view showing an entire structure of a scroll type compressor used in the refrigeration system, the 3 FIG other embodiments drawings, Figure 4 is a cross-sectional view of a conventional example, FIG. 5 (a) (b) is an explanatory view of the problems. (3)……固定スクロール (4)……可動スクロール (3a)(4a)……鏡板 (3b)(4b)……渦巻体 (13)……吸入ポート (14)……吐出ポート (24)…注入路 (25)……吸入ガス経路 (26)……圧力検出手段 (27)……開閉手段 (3) ... fixed scroll (4) ...... movable scroll (3a) (4a) ... end plate (3b) (4b) ...... spiral body (13) ... suction port (14) ... discharge port (24) ... injection channel (25) ... intake gas passage (26) ...... pressure detection means (27) ...... closing means

───────────────────────────────────────────────────── フロントページの続き (72)発明者 泉谷 俊夫 大阪府堺市築港新町3丁12番地 ダイキン 工業株式会社堺製作所臨海工場内 ────────────────────────────────────────────────── ─── of the front page continued (72) inventor Toshio Izumiya Sakai, Osaka Prefecture Chikkoshin-cho 3-chome 12 address Daikin Industries, Ltd. Sakai plant Linhai in the factory

Claims (1)

    【特許請求の範囲】 [The claims]
  1. 【請求項1】鏡板(3a)(4a)の中心部から外周部にかけて渦巻体(3b)(4b)を突設した固定及び可動スクロール(3)(4)を密閉ケーシング(1)内に備え、渦巻外方側の吸入ポート(13)から吸入する低圧ガスを前記渦巻体(3b)(4b)間に仕切られる圧縮室で圧縮し、 1. A preparation for the end plate (3a) spiral body to the outer portion from the center of (4a) (3b) projecting the (4b), fixed and movable scroll (3) (4) a closed casing (1) the low-pressure gas sucked from the suction port of the spiral outer side (13) is compressed in the compression chamber partitioned between the spiral body (3b) (4b),
    渦巻中心側の吐出ポート(14)から高圧ガスを吐出するようにしたスクロール形圧縮機を用いた冷凍装置において、吸入ガス経路(25)に、前記密閉ケーシング(1) The refrigeration apparatus using the scroll type compressor which is adapted to discharge a high-pressure gas from the spiral center of the discharge port (14), the suction gas path (25), the closed casing (1)
    外に吐出されたガス中の油又は液冷媒の注入路(24)を開口すると共に、前記スクロール形圧縮機の吐出側の高圧圧力又は吸入側の低圧圧力を検出する圧力検出手段(26)と、該検出手段(26)の検出値が設定値を越えるとき前記注入路(24)を閉じ、前記検出値が設定値を下回るとき開く開閉手段(27)とを設けたことを特徴とするスクロール形圧縮機を用いた冷凍装置。 Thereby opening the injection path of the oil or liquid refrigerant in the gas discharged to the outside (24), pressure detecting means for detecting a low pressure of the high pressure or suction side of the discharge side of the scroll-type compressor (26) , scroll, wherein said injection passage (24) closed, said detected value is provided and closing means for opening when below the set value (27) when the detection value of the detection means (26) exceeds the set value refrigerating apparatus using a shape compressor.
JP1116690A 1989-05-09 1989-05-09 Refrigeration apparatus using the scroll type compressor Expired - Fee Related JPH0765574B2 (en)

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JPH0765574B2 true JPH0765574B2 (en) 1995-07-19

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