JPH02125986A - Scroll type compressor - Google Patents

Scroll type compressor

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Publication number
JPH02125986A
JPH02125986A JP27996588A JP27996588A JPH02125986A JP H02125986 A JPH02125986 A JP H02125986A JP 27996588 A JP27996588 A JP 27996588A JP 27996588 A JP27996588 A JP 27996588A JP H02125986 A JPH02125986 A JP H02125986A
Authority
JP
Japan
Prior art keywords
chamber
scroll
fixed scroll
end plate
partition wall
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP27996588A
Other languages
Japanese (ja)
Inventor
Hitoshi Ozawa
仁 小沢
Hitoshi Tanaka
仁 田中
Yoshiaki Matoba
的場 好昭
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Daikin Industries Ltd
Original Assignee
Daikin Industries Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Daikin Industries Ltd filed Critical Daikin Industries Ltd
Priority to JP27996588A priority Critical patent/JPH02125986A/en
Publication of JPH02125986A publication Critical patent/JPH02125986A/en
Pending legal-status Critical Current

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Abstract

PURPOSE:To restrain a fixed scroll from deflection for improving performance by dividing the back surface side of the fixed scroll into two chambers by a partition wall so that a discharge port in a projection projectingly provided in the center of an end plate of the fixed scroll is opened to the first chamber and the second chamber is opened to the suction side of a compression chamber. CONSTITUTION:A scroll type hydraulic machine supports a fixed scroll 2 and a movable scroll 3 in vertically opposed combination through frames 4 respectively to connect interlockingly a drive shaft 6 of a motor 5 to the movable scroll 3. By the revolutional motion of the movable scroll 3, fluid suctioned into a compression chamber 7 defined between respective scroll bodies 22, 32 is compressed to be discharged to a high pressure chamber 8. Then, the back face side of the fixed scroll 2 is defined into two chambers 81, 82 by a partition wall 9, while a projection 24 extending through the partition wall 9 to the first chamber 81 is provided in the center of an end plate 21. A discharge hole 23 in the projection 24 is opened to the first chamber 81, while the second chamber is opened to the suction side of the compression chamber 7.

Description

【発明の詳細な説明】 (産業上の利用分野) 本発明は、主として冷凍装置等に使用されるスクロール
形圧縮機に関する。
DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a scroll compressor mainly used in refrigeration equipment and the like.

(従来の技術) 従来、スクロール形圧縮機は、例えば特開昭59−18
3091号公報に記載され、かつ、第7図に示すように
、密閉ケーシング(A)の内方上部側に、鏡板(a)に
渦巻体(b)を突設して成る固定スクロール(B)と、
同じく鏡板(C)に渦巻体(d)を突設して成る可動ス
クロール(C)とを上下対向状に組合せて架構(D)で
支持すると共に、前記ケーシング(A)の内方下部側に
モータ(E)を配設し、該モータ(E)に結合された駆
動軸(F)を前記可動スクロール(C)に連動連結して
、前記モータ(E)に伴う前記駆動軸(F)の回転によ
り、前記両スクロール(B)(C)の各渦巻体(b)(
d)間に形成される圧縮室(e)で吸入流体を圧縮し、
この圧縮流体を前記固定スクロール(B)における鏡板
(a)の中心部に設けた吐出孔(f)から、該鏡板(a
)の背面側に設けた高圧チャンバー(G)へと吐出させ
るようにしている。
(Prior Art) Conventionally, a scroll compressor has been developed, for example, in Japanese Patent Application Laid-Open No. 59-18
3091, and as shown in FIG. 7, a fixed scroll (B) comprising a spiral body (b) protruding from an end plate (a) on the inner upper side of a closed casing (A). and,
Similarly, a movable scroll (C) consisting of an end plate (C) and a spiral body (d) protruding from the end plate (C) is assembled vertically and supported by a frame (D), and a movable scroll (C) is provided on the inner lower side of the casing (A) A motor (E) is disposed, and a drive shaft (F) coupled to the motor (E) is interlocked and connected to the movable scroll (C), so that the drive shaft (F) accompanying the motor (E) is Due to the rotation, each spiral body (b) (
d) compressing the suction fluid in a compression chamber (e) formed between;
This compressed fluid is supplied from the discharge hole (f) provided in the center of the end plate (a) of the fixed scroll (B) to the end plate (a).
) is discharged into a high-pressure chamber (G) provided on the back side.

(発明が解決しようとする課題) ところが、以上のスクロール形圧縮機では、前記固定ス
クロール(B)における鏡板(a)の全背面側に高圧チ
ャンバー(G)が形成され、該高圧チャンバー(G)に
吐出された吐出流体による高圧圧力が、前記鏡板(a)
の背面側全面に付与されることから、この鏡板(a)に
下方側への挟み(通常30〜50μm)が発生し、前記
各渦巻体(b)(d)と各鏡板(a)(c)との対向面
間に隙間が生じて、シール性を損ない、圧縮効率を低下
させたりする問題があった。
(Problem to be Solved by the Invention) However, in the above scroll type compressor, a high pressure chamber (G) is formed on the entire rear side of the end plate (a) of the fixed scroll (B), and the high pressure chamber (G) The high pressure caused by the discharge fluid discharged to the end plate (a)
Because it is applied to the entire back side of the mirror, a downward pinch (usually 30 to 50 μm) occurs in this end plate (a), and the spiral bodies (b) and (d) and each end plate (a) and (c) ), there was a problem in that a gap was created between the facing surfaces, impairing sealing performance and reducing compression efficiency.

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、前記固定スクロールに撓みを低減して、各渦巻
体と各鏡板との対向面間を確実にンールして、圧縮効率
を高めることができるスクロール形圧縮機を提供するこ
とにある。
The present invention was made in view of the above-mentioned problems, and its purpose is to reduce the deflection of the fixed scroll, reliably wrap the opposing surfaces of each spiral body and each end plate, and improve compression efficiency. The objective is to provide a scroll compressor that can increase the

(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、ケーシング(
1)に、鏡板(21)(31)に渦巻体(22)(32
)をそれぞれ突設した固定及び可動スクロール(2)(
3)を対向状に組合せて内装し、前記渦巻体(22)(
32)間に形成する圧縮室(7)で吸入流体を圧縮して
、前記固定スクロール(2)の鏡板(21)の中心部に
設けた吐出孔(23)から吐出するようにしたスクロー
ル形圧縮機において、1lif記固定スクロール(2)
の背面側に、該背面側を第1室(81)と第2室(82
)とに区画する仕切壁(9)を設けると共に、前記固定
スクロール(2)における鏡板(21)の中心部に、前
記仕切壁(9)を貫通し、前記第1室(81)に臨む突
出部(24)を設け、該突出部(24)に設ける吐出孔
(23)を前記第1室(81)に開口させる一方、前記
第2室(82)を前記圧縮室(7)の吸入側に開口する
前記ケーシング(1)内に連通させたことを特徴とする
ものである。
(Means for Solving the Problem) In order to achieve the above object, the present invention provides a casing (
1), the spiral bodies (22) (32
) with protruding fixed and movable scrolls (2) and (
3) are combined in a facing manner and installed internally, and the spiral bodies (22) (
32) Scroll-type compression in which suction fluid is compressed in a compression chamber (7) formed between the two and discharged from a discharge hole (23) provided in the center of the end plate (21) of the fixed scroll (2). On the machine, 1lif fixed scroll (2)
The first chamber (81) and the second chamber (82) are connected to the back side of the
), and a protrusion extending through the partition wall (9) and facing the first chamber (81) is provided at the center of the end plate (21) of the fixed scroll (2). A discharge hole (23) provided in the protrusion (24) is opened to the first chamber (81), while the second chamber (82) is connected to the suction side of the compression chamber (7). It is characterized by communicating with the inside of the casing (1) which is opened to the inside of the casing (1).

(作用) 以上のスクロール形圧縮機では、前記固定スクロール(
2)の背面側が仕切壁(9)により第1室(81)と第
2室(82)とに区画されて、この第1室(81)内に
前記圧縮室(7)で圧縮された高圧流体が前記吐出孔(
23)を介して吐出され、前記第2室(82)は前記圧
縮室(7)の吸入側で低圧域に開放される。また、前記
固定スクロール(2)の鏡板(21)には、その中心部
に突出部(24)が形成され、該突出部(24)が前記
第1室(81)に露出されるのであり、従って、前記固
定スクロール(2)には、前記突出部(24)の前記第
1室(81)に臨む端面だけに、吐出流体による高圧圧
力が作用することとなり、一方、前記突出部(24)が
突出される鏡板(21)の中心部位には、前記圧縮室(
7)で圧縮された吐出直前の高圧流体が作用することに
なるため、この高圧流体による圧力と、前記突出部(2
4)の端面に付与される圧力とが互いに相殺され、前記
固定スクロール(2)の撓みが低減され、前記両スクロ
ール(2)(3)の各鏡板(21)  (31)と各渦
巻体(22)(32)との対向面が確実にンールされる
のである。
(Function) In the above scroll type compressor, the fixed scroll (
2) is partitioned by a partition wall (9) into a first chamber (81) and a second chamber (82), and the high pressure compressed in the compression chamber (7) is contained in the first chamber (81). Fluid flows through the discharge hole (
23), and the second chamber (82) is opened to a low pressure region on the suction side of the compression chamber (7). Further, a protrusion (24) is formed in the center of the end plate (21) of the fixed scroll (2), and the protrusion (24) is exposed to the first chamber (81). Therefore, high pressure due to the discharged fluid acts on the fixed scroll (2) only on the end face of the protrusion (24) facing the first chamber (81). The compression chamber (
Since the high-pressure fluid compressed in step 7) and just before being discharged will act, the pressure caused by this high-pressure fluid and the protrusion (
4) cancel each other out, the deflection of the fixed scroll (2) is reduced, and each end plate (21) (31) of both scrolls (2) (3) and each spiral body ( 22) and (32) are reliably rolled.

(実施例) 第1図に示したスクロール形圧縮機は、密閉構造とされ
たケーシング(1)の内方上部に、鏡板(21)に渦巻
体(22)を突設して成る固定スクロール(2)と、同
じく鏡板(31)に渦巻体(32)を突設して成る可動
スクロール(3)とを、それぞれ上下対向状に組合せて
架構(4)で支持すると共に、前記ケーシング(1)の
内方下部側に、ステータ(51)とロータ(52)とか
ら成るモータ(5)を配設して、該モータ(5)のロー
タ(52)に結合した駆動軸(6)の上部側を、前記可
動スクロール(3)に連動連結させて、前記モータ(5
)に伴う前記駆動軸(6)の回転により、前記各渦巻体
(22)(32)間に形成される圧縮室(7)で吸入流
体を圧縮し、この圧縮流体を前記固定スクロール(2)
における鏡板(21)の中心部に設けた吐出孔(23)
から、前記ケーシング(1)の内方上部側に形成した高
圧チャンバー(8)に吐出するようにしている。
(Example) The scroll type compressor shown in Fig. 1 is a fixed scroll (22) formed by protruding a spiral body (22) from an end plate (21) at the inner upper part of a casing (1) having a hermetic structure. 2) and a movable scroll (3), which also has a spiral body (32) protruding from an end plate (31), are combined vertically and supported by a frame (4), and the casing (1) A motor (5) consisting of a stator (51) and a rotor (52) is disposed on the inner lower side of the motor (5), and the upper side of the drive shaft (6) connected to the rotor (52) of the motor (5). is interlocked and connected to the movable scroll (3) to connect the motor (5) to the movable scroll (3).
), the suction fluid is compressed in the compression chamber (7) formed between the spiral bodies (22) and (32), and this compressed fluid is transferred to the fixed scroll (2).
The discharge hole (23) provided in the center of the end plate (21) in
From there, it is discharged into a high pressure chamber (8) formed on the inner upper side of the casing (1).

しかして以上のようなスクロール形圧縮機において、前
記ケーシング(1)の内部で固定スクロール(2)の上
部側に仕切壁(9)を設けて、該仕切壁(9)で前記高
圧チャンバー(8)の内方上下部位を、第1室(81)
と第2室(82)とに画成すると共に、前記固定スクロ
ール(2)における鏡板(21)の中心部に、上方に向
けて突出する突出部(24)を一体に設ける一方、前記
仕切壁(9)の中心部に挿通孔(91)を開設して、該
挿通孔(91)から前記突出部(24)を、その端面を
前記第1室(81)に臨ませて挿通支持させる。
However, in the scroll compressor as described above, a partition wall (9) is provided inside the casing (1) on the upper side of the fixed scroll (2), and the partition wall (9) separates the high pressure chamber (8) from the high pressure chamber (8). ) inside the upper and lower parts of the first chamber (81)
and a second chamber (82), and a protrusion (24) that protrudes upward is integrally provided at the center of the end plate (21) of the fixed scroll (2), while the partition wall An insertion hole (91) is formed in the center of the housing (9), and the protrusion (24) is inserted and supported through the insertion hole (91) with its end face facing the first chamber (81).

そして、前記固定スクロール(2)に設けた突出部(2
4)に、前記圧縮室(7)の中心部位に臨む前記吐出孔
(23)を形成して、前記圧縮室(7)で圧縮の圧縮流
体を、前記吐出孔(23)から前記第1室(81)へと
吐出するようになすと共に、前記第2室(82)を前記
圧縮室(7)の吸入側で前記ケーシング(1)の低圧域
に開放させるようにしたのである。
The protrusion (2) provided on the fixed scroll (2)
4), the discharge hole (23) facing the center part of the compression chamber (7) is formed, and the compressed fluid compressed in the compression chamber (7) is supplied from the discharge hole (23) to the first chamber. (81), and the second chamber (82) is opened to the low pressure region of the casing (1) on the suction side of the compression chamber (7).

又、前記仕切壁(9)の挿通孔(91)は、該仕切壁(
9)の中央一部を下方側に筒状に折曲げて形成し、この
筒状の折曲部位と前記固定スクロール(2)の突出部(
24)との間に、リング状のシール部材(10)を介装
させ、該シール部材(10)で前記各室(81)(82
)を気密状に区画するようになすのである。
Further, the insertion hole (91) of the partition wall (9) is inserted into the partition wall (9).
9) is bent downward into a cylindrical shape, and this cylindrical bent portion and the protruding portion (2) of the fixed scroll (2)
A ring-shaped seal member (10) is interposed between the chambers (81) and (82).
) in an airtight manner.

以」−の構成とするときには、前記圧縮室(7)で圧縮
された高圧流体が、前記吐出孔(23)から前記第1室
(81)へと吐出されて、この第1室(81)が高圧と
なり、一方、前記第2室(82)は、前記圧縮室(7)
の吸入側で前記ケーシング(1)の低圧域に開放され、
前記第2室(82)が低圧に保持される。
When the configuration is as follows, the high-pressure fluid compressed in the compression chamber (7) is discharged from the discharge hole (23) to the first chamber (81). has a high pressure, while the second chamber (82) has a high pressure in the compression chamber (7).
is opened to the low pressure region of the casing (1) on the suction side of the casing (1);
The second chamber (82) is maintained at low pressure.

又、前記固定スクロール(2)における鏡板(21)の
中心部には、前記突出部(24)が形成され、この突出
部(24)の端面が前記第1室(81)に露出されてい
ることから、前記固定スクロール(2)には、前記突出
部(24)の前記第1室(81)に臨む端面だけに、吐
出流体による高圧圧力が下方に向けて作用することとな
り、一方、前記突出部(24)が突出される鏡板(21
)の中心部位には、前記圧縮室(7)で圧縮された吐出
直前の高圧流体が上方に向けて作用することになるため
、この高圧流体による上方への圧力と、前記突出部(2
4)の端面に付与される下方への圧力とが互いに相殺さ
れ、前記固定スクロール(2)の撓みが低減されるので
ある。
Further, the protrusion (24) is formed in the center of the end plate (21) of the fixed scroll (2), and the end surface of the protrusion (24) is exposed to the first chamber (81). Therefore, on the fixed scroll (2), high pressure due to the discharged fluid acts downward only on the end face of the protrusion (24) facing the first chamber (81). The end plate (21) from which the protrusion (24) is protruded
), the high-pressure fluid compressed in the compression chamber (7) and just before being discharged acts upwardly on the center of the protrusion (2).
4) and the downward pressure applied to the end face cancel each other out, thereby reducing the deflection of the fixed scroll (2).

次に、前記突出部(24)が第1室(81)に対面する
面積、即ち、該突出部(24)に高圧圧力が作用する面
積(A)を、具体的にいかに定めるかについて、その設
計手順を説明する。
Next, we will discuss how to specifically determine the area where the protrusion (24) faces the first chamber (81), that is, the area (A) where high pressure acts on the protrusion (24). Explain the design procedure.

第2図に示すように、上向き方向を正とし、固定スクロ
ール(2)の鏡板(21)に上向きに作用する力(F)
を、圧縮室(7)の内部圧力に基づ(上向きの力(Fg
)、吐出圧力たる高圧圧力(Pd)及び吸入圧力たる低
圧圧力(Ps)で表すと、次式■で表示される。
As shown in Fig. 2, the force (F) acting upward on the end plate (21) of the fixed scroll (2), with the upward direction being positive.
is based on the internal pressure of the compression chamber (7) (upward force (Fg
), the high pressure (Pd) which is the discharge pressure, and the low pressure (Ps) which is the suction pressure, is expressed by the following formula (2).

F=Fg−As (Pd−Ps)  ・−−−■ここで
、前記内部圧力に基づく力(F g)は、低圧圧力(P
s)と高圧圧力(Pd)との関数で表され(次式■)、
第3図に示すように高圧圧力(Pd)が同一でも低圧圧
力(Ps)が増大すれば大きくなり、又、低圧圧力(P
s)が同一でも高圧圧力が増大すれば大きくなる。
F=Fg-As (Pd-Ps) ・---■Here, the force based on the internal pressure (F g) is the low pressure (P
s) and high pressure (Pd) (the following formula ■),
As shown in Figure 3, even if the high pressure (Pd) is the same, the lower pressure (Ps) will increase, and the lower pressure (Ps) will increase.
Even if s) is the same, it will increase as the high pressure increases.

Fg=func、(Ps、Pd) ・・−■一方、低圧
圧力(Ps)及び高圧圧力(Pd)は、第4図に示すよ
うに、この種圧縮機の典型適用例たる空気調和機の使用
範囲により、その上限(Psi、Pd1)及び下限(P
s3.Pd4)が規制される。このため、前記内部圧力
に基づく力(F g)は、第3図中斜線を施した範囲内
で変化することになる。
Fg=func, (Ps, Pd)...- ■On the other hand, the low pressure (Ps) and high pressure (Pd) are determined by the use of an air conditioner, which is a typical application example of this type of compressor, as shown in Figure 4. Depending on the range, its upper limit (Psi, Pd1) and lower limit (P
s3. Pd4) is regulated. Therefore, the force (F g) based on the internal pressure changes within the shaded range in FIG.

このように、内部圧力に基づく力(F g)は、低圧圧
力(Ps)と高圧圧力(Pd)との関数で与えられ、し
かも、これら低圧圧力(Ps)及び高圧圧力(Pd)は
ある変化範囲をもつため、結局、固定スクロール(2)
の鏡板(21)に作用する力(F)は、ある設定面積(
A)に対して、低圧圧力(Pd)と高圧圧力(Pd)と
の関数で与えられ(次式■)、これら低圧及び高圧圧力
(Ps、Pd)の条件いかんで、一定の変化範囲をもつ
ことになる。
In this way, the force (F g) based on the internal pressure is given as a function of the low pressure (Ps) and the high pressure (Pd), and these low pressure (Ps) and high pressure (Pd) change with a certain amount. Because it has a range, it ends up being a fixed scroll (2)
The force (F) acting on the end plate (21) of
For A), it is given as a function of low pressure (Pd) and high pressure (Pd) (the following formula ■), and has a certain range of variation depending on the conditions of these low pressure and high pressure (Ps, Pd). It turns out.

F=func、(Ps、Pd)  −■今、この力(F
)の変化範囲における最大値をFmaX1最小値をFm
1nとおくと、これらは、面積(A)が小さいと、該面
積(A)以外の鏡板(21)上面部分の低圧圧力作用面
が拡大して、第1室(81)側からの下向き力よりも圧
縮室(7)側からの上向き力が勝るため、正の値となり
、鏡板(21)には上向きの力が作用することになる。
F=func, (Ps, Pd) -■Now this force (F
) The maximum value in the range of change is FmaX1 The minimum value is Fm
1n, if the area (A) is small, the low pressure acting surface of the upper surface of the end plate (21) other than the area (A) will expand, and the downward force from the first chamber (81) will be Since the upward force from the compression chamber (7) side is greater than this, it becomes a positive value, and an upward force acts on the end plate (21).

一方、面積(A)が大きいと、逆に圧縮室(7)側から
の上向き力が第1室(81)側からの下向き力よりも勝
るため、負の値をとり、鏡板(21)には下向きの力が
作用することになる。この関係を、前記突出部(24)
が円形である場合について、その面積(A)に見合った
直径(D=[TX7了)を、渦巻体(21又は32)の
渦巻ピッチ(p)で除した変数(D/p)で表すと、第
5図に示すようになり、D/pの増大に伴い、Fmax
及びFm1nは小さくなり、ある値を越えると、正から
負に転じることになる。
On the other hand, when the area (A) is large, the upward force from the compression chamber (7) side exceeds the downward force from the first chamber (81) side, so it takes a negative value and the end plate (21) will have a downward force acting on it. This relationship is determined by the protrusion (24)
When is circular, the diameter (D = [TX7了) commensurate with its area (A) is expressed as a variable (D/p) divided by the spiral pitch (p) of the spiral body (21 or 32). , as shown in Fig. 5, and as D/p increases, Fmax
and Fm1n become small, and when they exceed a certain value, they turn from positive to negative.

尚、前記ピッチ(p)は、渦巻体を構成するインボリュ
ートの基礎円の円周である。又、第5図の目盛りは、一
般的な5馬力程度の圧縮機の具体的数値例である。
Note that the pitch (p) is the circumference of the base circle of the involute that constitutes the spiral body. Moreover, the scale in FIG. 5 is a specific numerical example of a general compressor of about 5 horsepower.

こうして、上記したD/pによりFmax及びFm1n
の値は変化するが、結局、これらの値の絶対値IFma
xl  lFm1nlの大きい方が、そのD/pにおけ
る最大の力IF+として評価できることになるため、第
6図に示すように、この力の絶対値IF+が、許容値以
下に収まるように、上記D/pひいては面積(A)を設
定すればよいこととなるのである。因みに、IFlの許
容値を、250kgfとした場合、直径(D)の範囲は
、 1、7 ・ p  ≦  D  ≦  3.4 ・ p
・・・・■となる。尚、この許容値250kgf以下な
らば、実際上固定スクロール(2)の鏡板(21)の撓
みは殆ど問題とならないものである。
In this way, Fmax and Fm1n are determined by D/p described above.
The values of change, but in the end, the absolute value of these values IFma
The larger xl lFm1nl can be evaluated as the maximum force IF+ at that D/p, so as shown in Figure 6, the above D/p is adjusted so that the absolute value IF+ of this force is within the allowable value. All that is required is to set p and thus the area (A). Incidentally, if the allowable value of IFl is 250 kgf, the range of diameter (D) is 1, 7 ・p ≦ D ≦ 3.4 ・p
...■. Incidentally, as long as the allowable value is less than 250 kgf, the deflection of the end plate (21) of the fixed scroll (2) does not actually pose a problem.

(発明の効果) 以上説明したように、本発明にかかるスクロール形圧縮
機では、固定スクロール(2)の背面側に、該背面側を
第1室(81)と第2室(82)とに区画する仕切壁(
9)を設けると共に、前記固定スクロール(2)におけ
る鏡板(21)の中心部に、前記仕切壁(9)を貫通し
て前記第1室(81)に臨む突出部(24)を設け、こ
の突出部(24)に設ける吐出孔(23)を前記第1室
(81)に開口させる一方、前記第2室(82)を前記
圧縮室(7)の吸入側に開口する前記ケーゾング(1)
内に連通させたから、前記固定スクロール(2)に撓み
が発生するのを低減できて、前記固定及び可動スクロー
ル(2)(3)の各鏡板(21)(31)と各渦巻体(
22)(32)との対向面間を確実にシールして、圧縮
効率を高め得るに至ったのである。
(Effects of the Invention) As explained above, in the scroll compressor according to the present invention, the fixed scroll (2) is provided with a back side that is connected to the first chamber (81) and the second chamber (82). Partition wall (
9), and a protrusion (24) penetrating the partition wall (9) and facing the first chamber (81) is provided in the center of the end plate (21) of the fixed scroll (2). The casing (1) has a discharge hole (23) provided in the protrusion (24) open to the first chamber (81), and the second chamber (82) to the suction side of the compression chamber (7).
Since the fixed scroll (2) is in communication with the inside, it is possible to reduce the occurrence of deflection in the fixed scroll (2), and each end plate (21) (31) of the fixed and movable scroll (2) (3) and each spiral body (
22) and (32) were reliably sealed, thereby increasing the compression efficiency.

【図面の簡単な説明】[Brief explanation of drawings]

第1図は本発明スクロール形圧縮機の縦断面図、第2図
〜第6図は突出部の大きさを定めるときの説明図であっ
て、第2図は固定スクロールに作用する力を示す図、第
3図は低圧圧力と圧縮室内圧に基づく力との関係図、第
4図は空気調和機への適用時の低圧及び高圧圧力の使用
範囲を示す図、第5図は固定スクロールに作用する力の
最大値及び最小値の変化を示す図、第6図はその絶対値
の変化を示す図であり、第7図は従来例を示す断面図で
ある。 (1)・・・・ (2)・1・ (21)・1 (22)・・・ (23)・・・ (24)・・・ (3)・・・・ (31)・・・ (32)・・・ (7)・・・・ (81)−−拳 (82)・・・ (9)・11@・ Qケーシング ・固定スクロール ・鏡板 ・渦巻体 ・吐出孔 ・突出部 ・可動スクロール ・鏡板 ・渦巻体 ・圧縮室 ・第1室 ・第2室 自仕切壁 」 確頃嬰代と 瞭
Fig. 1 is a longitudinal sectional view of the scroll compressor of the present invention, Figs. 2 to 6 are explanatory diagrams for determining the size of the protrusion, and Fig. 2 shows the force acting on the fixed scroll. Figure 3 is a diagram showing the relationship between low pressure and force based on compression chamber pressure, Figure 4 is a diagram showing the usage range of low pressure and high pressure when applied to air conditioners, and Figure 5 is a diagram showing the usage range of low pressure and high pressure when applied to air conditioners. FIG. 6 is a diagram showing changes in the maximum and minimum values of the applied force, FIG. 6 is a diagram showing changes in the absolute value thereof, and FIG. 7 is a sectional view showing a conventional example. (1)... (2)・1・ (21)・1 (22)... (23)... (24)... (3)... (31)... ( 32)... (7)... (81)--Fist (82)... (9)・11@・Q casing, fixed scroll, end plate, spiral body, discharge hole, protrusion, movable scroll・Mirror plate, spiral body, compression chamber, 1st chamber, 2nd chamber self-partition wall”

Claims (1)

【特許請求の範囲】[Claims] 1) ケーシング(1)に、鏡板(21)(31)に渦
巻体(22)(32)をそれぞれ突設した固定及び可動
スクロール(2)(3)を対向状に組合せて内装し、前
記渦巻体(22)(32)間に形成する圧縮室(7)で
吸入流体を圧縮して、前記固定スクロール(2)の鏡板
(21)の中心部に設けた吐出孔(23)から吐出する
ようにしたスクロール形圧縮機において、前記固定スク
ロール(2)の背面側に、該背面側を第1室(81)と
第2室(82)とに区画する仕切壁(9)を設けると共
に、前記固定スクロール(2)における鏡板(21)の
中心部に、前記仕切壁(9)を貫通し、前記第1室(8
1)に臨む突出部(24)を設け、該突出部(24)に
設ける吐出孔(23)を前記第1室(81)に開口させ
る一方、前記第2室(82)を前記圧縮室(7)の吸入
側に開口する前記ケーシング(1)内に連通させている
ことを特徴とするスクロール形圧縮機。
1) A fixed and movable scroll (2) and a movable scroll (2) and a movable scroll (3) each having a spiral body (22) and a spiral body (32) protruding from an end plate (21) and (31), respectively, are installed inside the casing (1) in a facing manner, and The suction fluid is compressed in a compression chamber (7) formed between the bodies (22) and (32), and is discharged from a discharge hole (23) provided in the center of the end plate (21) of the fixed scroll (2). In the scroll compressor, a partition wall (9) is provided on the back side of the fixed scroll (2) to partition the back side into a first chamber (81) and a second chamber (82), and The first chamber (8) passes through the partition wall (9) at the center of the end plate (21) of the fixed scroll (2).
1), a discharge hole (23) provided in the projection (24) is opened to the first chamber (81), and the second chamber (82) is connected to the compression chamber (81). 7) A scroll compressor, characterized in that the scroll compressor communicates with the inside of the casing (1) which opens on the suction side of the scroll compressor.
JP27996588A 1988-11-05 1988-11-05 Scroll type compressor Pending JPH02125986A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP27996588A JPH02125986A (en) 1988-11-05 1988-11-05 Scroll type compressor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP27996588A JPH02125986A (en) 1988-11-05 1988-11-05 Scroll type compressor

Publications (1)

Publication Number Publication Date
JPH02125986A true JPH02125986A (en) 1990-05-14

Family

ID=17618400

Family Applications (1)

Application Number Title Priority Date Filing Date
JP27996588A Pending JPH02125986A (en) 1988-11-05 1988-11-05 Scroll type compressor

Country Status (1)

Country Link
JP (1) JPH02125986A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0466701A (en) * 1990-07-06 1992-03-03 Mitsubishi Heavy Ind Ltd Scroll type fluid machine
US5186616A (en) * 1990-07-06 1993-02-16 Mitsubishi Jukogyo Kabushiki Kaisha Scroll type fluid machinery with reduced pressure biasing the stationary scroll
WO1997045642A1 (en) 1996-05-28 1997-12-04 Daikin Industries, Ltd. Scroll compressor
US6042346A (en) * 1995-10-17 2000-03-28 Daikin Industries, Ltd. Refrigerant compressor having an open type refrigerant pool and an oil reservoir

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5960089A (en) * 1982-09-29 1984-04-05 Toshiba Corp Scroll compressor
JPS61169686A (en) * 1985-01-23 1986-07-31 Hitachi Ltd Scroll compressor
JPS63239391A (en) * 1987-03-25 1988-10-05 Mitsubishi Electric Corp Scroll compressor

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5960089A (en) * 1982-09-29 1984-04-05 Toshiba Corp Scroll compressor
JPS61169686A (en) * 1985-01-23 1986-07-31 Hitachi Ltd Scroll compressor
JPS63239391A (en) * 1987-03-25 1988-10-05 Mitsubishi Electric Corp Scroll compressor

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0466701A (en) * 1990-07-06 1992-03-03 Mitsubishi Heavy Ind Ltd Scroll type fluid machine
US5186616A (en) * 1990-07-06 1993-02-16 Mitsubishi Jukogyo Kabushiki Kaisha Scroll type fluid machinery with reduced pressure biasing the stationary scroll
US5330463A (en) * 1990-07-06 1994-07-19 Mitsubishi Jukogyo Kabushiki Kaisha Scroll type fluid machinery with reduced pressure biasing the stationary scroll
US6042346A (en) * 1995-10-17 2000-03-28 Daikin Industries, Ltd. Refrigerant compressor having an open type refrigerant pool and an oil reservoir
WO1997045642A1 (en) 1996-05-28 1997-12-04 Daikin Industries, Ltd. Scroll compressor
US6095764A (en) * 1996-05-28 2000-08-01 Daikin Industries, Ltd. Reverse rotation protection for a scroll compressor using a valve means

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