508411 A7 B7 五、發明説明（1) 發明背景 (請先閲讀背面之注意事項再填寫本頁) 本發明係關於渦卷式壓縮機，特別是關於適合於壓縮 空調用或冷凍用之冷媒之渦卷式壓縮機。 在將渦卷式壓縮機當成房間空調機等之壓縮機使用之 情形，變成在涵蓋廣範圍之運轉條件下使用渦卷式壓縮機 。在那種運轉條件下，渦卷式壓縮機無法避免在過壓縮狀 態或液體壓縮狀態運轉。因此，渦卷式壓縮機很多被適用 在也可以耐得住過壓縮以及液體壓縮之構造。 經濟部智慧財產局員工消費合作社印製 具備防止過壓縮以及液體壓縮之構造之渦卷式壓縮機 之一般的構成之一例如下。首先，吐出壓室被形成在具有 吸入口與排出口之密閉容器內。電動機與壓縮機構部被收 容在此吐出壓室內。壓縮機構部係具備：具有渦卷狀之氣 體通路之固定渦卷，以及被配置爲與此固定渦卷可以相對 移動，具有渦卷狀之餘面之旋轉渦卷。旋轉渦卷被連結於 一面阻止旋轉渦卷之自轉，一面使旋轉渦卷公轉運動之歐 丹環之同時，被連結於對於藉由電動機被旋轉驅動之曲柄 軸爲偏心之偏心軸。而且，藉由電動機之驅動，旋轉渦卷 一面搖動一面於固定渦卷與旋轉渦卷之間的吸入室內吸入 冷媒，將被吸入之冷媒依序導入固定渦卷與旋轉渦卷之間 的壓縮室而加以壓縮，將被壓縮之冷媒透過吐出壓室由排 出口排出之。 而且，於此種之渦卷式壓縮機中，固定渦卷係於固定 渦卷上部之上板配置作爲連結壓縮室與吐出壓室之貫穿孔 之釋放孔以及開關此釋放孔之釋放控制閥（dispose)。此 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） -4- 508411 A7 ΒΊ___ 五、發明説明（2) (請先閲讀背面之注意事項再填寫本頁) 釋放控制閥在壓縮工程之中途，壓縮室內之壓力在成爲吐 出壓力以上之壓縮時或基於溫度條件等，液體冷媒由吸入 口被吸入之液體壓縮時，打開釋放孔，將壓力上升之氣體 或液體冷媒由壓縮室內排出於吐出壓室內。因此，藉由此 釋放控制閥，渦卷式壓縮機之壓縮機構部由於固定渦卷與 旋轉渦卷之間的機械摩擦之損失被降低之同時，個渦卷之 餘面的損傷也被防止。 經部智慧財產局員工消費合作社印製 但是，在習知之渦卷式壓縮機之釋放控制閥之構造中 ，在固定渦卷之上板連結壓縮室與吐出壓室之釋放孔之端 部設置控制閥本體之故，釋放孔成爲壓縮室之一部份。即 ，釋放孔之容積作爲壓縮室之無效容積變成再膨脹容積。 即，在將被導入壓縮室內之氣體以規定之壓力壓縮時，壓 縮室內之氣體的一部份進入釋放孔。而且，應壓縮氣體在 釋放孔之中再膨脹，壓縮室內之氣體壓力下降於規定壓力 之下之故，導致壓縮機構部之容積效率的降低。爲了降低 由於此再膨脹之損失，如使釋放孔之體積變小，可以達成 該目的。又，單純縮小釋放孔之內徑，使固定渦卷之上板 變薄也可以獲得藉由達成該目的之效果。 但是，在縮小釋放孔之內徑的構造中，特別是在液體 壓縮之情形，液體冷媒之脫離變差，無法達成作爲釋放閥 之目的。 另一方面，在使上板之厚度變薄之構造中，基於運轉 時之吐出壓力，J：板變形，壓縮機構部之中，特別是導致 固定渦卷與旋轉渦卷之間的機械摩擦之損失之同時，也導 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐) ' -5- 508411 A7 B7 五、發明説明（3) 致由於液體冷媒之洩漏損失之壓縮性能之降低。 (請先閲讀背面之注意事項再填寫本頁) 發明摘要 本發明之課題在於提供：不損及固定渦卷之剛性t可 以縮小壓縮室內之再膨眼容積之渦卷式壓縮機。 爲了解決前述課題，本發明之渦卷式壓縮機係吐出壓 室被形成於具有吸入口與排出口之密閉容器內，電動機與 被連結於該電動機之壓縮機構部被收容於突出壓室內，壓 縮機構部具備：被固定在密閉容器，具有連結吸入口與面 臨吐出壓室之吐出口之之渦卷狀的氣體通路之固定渦卷； 以及具有嚙合前述氣體通路之渦卷狀之餘面，接受電動機 之驅動力而搖動運動之旋轉渦卷，以固定渦卷之氣體通路 與旋轉渦卷之餘面構成吸入室與壓縮室，於固定渦卷中， 連通於壓縮室之釋放孔與連通於吐出壓室之閥室相互連續 ，壓縮室內之壓力超過設定壓力時，將壓縮室內之流體排 出於吐出壓室內之釋放控制閥被設置於閥室內。 於本發明之渦卷式壓縮機中可以適當附加以下之要素 經濟部智慧財產局員工消費合作社印製 〇 (1 )旋轉渦卷被繋合於一面阻止旋轉渦卷之自轉， 一面使旋轉渦卷公轉運動之歐丹環之同時，被連結於對於 藉由電動機被旋轉驅動之曲柄軸爲偏心被固定，將曲柄軸 之旋轉運動轉換爲搖動運動之偏心軸，歐丹環可以移動地 被支持於機架（frame )。機架係被固定在密閉容器，可以 旋轉自如地支持曲柄軸，構成歐丹環之移動路徑。 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） -6- 508411 A7 B7 五、發明説明（4) (2 )釋放孔與閥室係形成連結壓縮室與吐出室之流 體通路。 (3 )閥座面被設置於與閥室的釋放孔之邊界。釋放 ί空制閥具備：被裝置於閥座面之閥板，以及將閥板按壓於 _板面側之彈性體，以及被固定在閥室內，支持彈性體之 襯套（bush)。 (4)襯套被壓入閥室內被固定，又，襯套具有連結 閥室與吐出室之貫穿孔。 (5 )襯套具備複數的貫穿孔。該複數之貫穿孔之全 ti的剖面積比釋放孔之剖面積大。 作爲連結壓縮室與吐出壓室之流體通路，固定渦卷具 備釋放孔與閥室相互連續之構成，釋放控制閥被設置於閥 室內之故，不使固定渦卷之厚度變薄，即不損及固定渦卷 之剛性，可以縮小壓縮室之無效容積之同時，可以縮小再 膨脹容積，可以降低再膨脹損失與機械摩耗損失以及洩漏 損失，有助於壓縮效率之提升。 v 又，藉由使閥室之剖面積大於釋放孔之剖面積，可以 充分確保壓縮氣體以及液體冷媒之流路，降低流路阻力。 合適實施例之說明 以下，依據圖面說明本發明之一實施形態。圖1係顯 示本發明之一實施形態之渦卷式壓縮機之縱剖面圖。於圖 1中，渦卷式壓縮機1 0係具備鐵製之密閉容器1 2。密 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） (請先閲讀背面之注意事項再填寫本頁) ，項再填命 經濟部智慧財產局員工消費合作社印製 508411 A7 ___ B7 五、發明説明（5) 閉容器12幾乎被形成爲圓筒狀，上部與下部被堵塞。密 閉容器1 2之上部具有吸入口 1 4，密閉容器1 2之側部 具有排出口 1 6，密閉容器1 2之內部具有吐出壓室1 8 〇 壓縮機構部2 0與電動機2 2被收容在吐出壓室1 8 。壓縮機構部2 0具備固定渦卷2 4與旋轉渦卷2 6，電 動機2 2具備轉子2 8與定子3 0。轉子2 8被固定在曲 柄軸3 2之外周側。 固定渦卷2 4例如係利用鑄鐵被形成爲幾乎爲圓盤狀 ，藉由螺絲3 4被固定於機架3 6。機架3 6係其外周側 藉由熔接被固定在密閉容器12之內壁面。 此固定渦卷2 4如圖2所示般地，具備：連結吸入口 1 4與面臨吐出壓室1 8之吐出口 3 8之氣體通路4 0。 此氣體通路4 0藉由渦卷狀之餘面4 2被形成爲渦卷狀。 幾乎被形成爲圓盤狀之旋轉渦卷2 6相面對於固定渦卷 2 4，可以搖動自如地被配置著。如圖2所示般地，與固 定渦卷2 4之餘面4 2嚙合之渦卷狀之餘面4 4被形成在 旋轉渦卷2 6之上部側。吸入室4 6與壓縮室4 8被形成 在餘面4 2與餘面4 4之間。旋轉渦卷2 6之底部側被連 結於偏心軸5 0。偏心軸5 0以對於曲柄軸3 2係偏心之 狀態被配置，與曲柄軸3 2 —體地被形成。 曲柄軸3 2藉由電動機2 2之驅動成爲旋轉運動。曲 柄軸3 2之驅動力被傳達於偏心軸5 0。在此情形，偏心 軸5 0係以曲柄軸3 2爲中心之搖動運動。即，3 2 —旋 本紙張尺度適用中國國家標準（CNS ) A4規格（210X 297公釐） (請先閲讀背面之注意事- >項再填- :寫本頁) 經濟部智慧財產局員工消費合作社印製 -8- 508411 A7 B7 五、發明説明（6) 轉運動，此旋轉運動藉由偏心軸5 0被轉換爲搖動運動。 歐丹環5 2被配置於旋轉渦卷2 6之底部側與機架 3 6之間。歐丹環5 2被裝置在被形成在旋轉渦卷2 6之 底部側之溝與被形成在機架3 6之上部側之溝，成爲十字 方向而運動。即，歐丹環5 2 —面阻止旋轉渦卷2 6之自 轉一面使旋轉渦卷2 6做公轉運動。又，機架3 6具備旋 轉自如地支持曲柄軸3 2之軸承3 6 a，透過被形成在曲 柄軸3 2之中心部之油通路5 4，腔室5 6內之油被供給 於此軸承3 6 a或偏心軸5 0。即，成爲吸入口 1 4之壓 力與吐出壓室18內之壓力的中間壓力之中間壓室被形成 在偏心軸5 0與旋轉渦卷2 6之間，藉由中間壓室之壓力 與吐出壓室之壓力的壓力差，腔室56內之油透過油通路 5 4被供給於軸承3 6 a。 氣體（冷媒）由吸入口 1 4被導入，藉由旋轉渦卷 26之搖動運動氣體被壓縮之過程中，爲了壓縮室48內 之氣體成爲吐出壓力以上時，將壓縮室48內之氣體吐出 於吐出壓室1 8內，於本實施形態中，釋放控制閥5 8共 4個被配設於固定渦卷2 4。與此同時，固定渦卷2 4具 備4個之閥室6 0與釋放孔6 2。 各閥室6 0與各釋放孔6 2如圖3所示般地，作爲連 結壓縮室4 8與吐出壓室1 8之流體通路，釋放孔6 2與 閥室6 0相互連續被形成，閥室6 0被形成爲連通於吐出 壓室18。其結果爲：釋放孔62與壓縮室48連通。而 且，於各閥室6 0內，壓縮室4 8內之壓力超過設定壓力 本纸張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） (請先閲讀背面之注意事 •項再填· :寫本頁) 經濟部智慧財產局員工消費合作社印製 -9- 508411 經濟部智慧財產局員工消費合作社印製 A7 B7 丨丨 — - -五、發明説明（7) 時，將壓縮室48內之流體排出於吐出壓室18內之釋放 控制閥5 8被配設著。即，閥室6 0與釋放孔6 2在固定 渦卷2 4之上板6 4之厚度方向，被形成爲閥室6 0之剖 面積比起釋放孔6 2之剖面積爲大。閥室6 0之中，閥座 面6 6以圓環狀被形成在與釋放孔6 2之邊界。以鐵製之 圓盤狀的閥座6 8被裝置於閥座面6 6上。作爲將閥座 6 8按壓於閥座面6 6側之彈性體之螺旋彈簧7 0被裝置 於閥座6 8上。螺旋彈簧7 0裝置於被壓入閥室6 0之上 部側而被固定之鐵製的襯套7 2之突起部7 4。襯套7 2 於中心部具備貫穿孔7 4。複數之貫穿孔7 6被配置於貫 穿孔7 4之周圍。各貫穿孔7 4、7 6之各剖面積之合計 (全體之剖面積）比釋放孔6 2之剖面積大。 於上述之構成中，電動機2 2被旋轉驅動，旋轉渦卷 2 6 —搖動運動，被導入吸入口1 4之氣體（冷媒氣體） 依序被導入吸入室4 6內。被導入之氣體依循旋轉渦卷 26之搖動運動依序被送於壓縮室48內，在各壓縮室 4 8內被壓縮。在一定之壓縮比之下被壓縮之氣體由吐出 口 3 8被排出於吐出壓室1 8內，吐出壓室1 8內之氣體 由排出口 1 6透過管路7 8被排出。 在冷媒氣體被壓縮之過程中，壓縮室48內之壓力在 設定壓力以下（吐出壓力+螺旋彈簧7 0之彈簧力）之時 ，各釋放孔6 2藉由螺旋彈簧7 0之彈簧力，藉由各釋放 控制閥4 8之閥座6 8而被堵塞，各閥室6 0成爲被與壓 縮室4 8隔斷之狀態。在此情形，釋放孔6 2之容積成爲 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） "~ -10- (請先閲讀背面之注意事- 項再填· 裝-- :寫本頁) 訂 508411 A7 __£7_^___ 五、發明説明（8) (請先閲讀背面之注意事項再填寫本頁) 壓縮室4 8之容積之一部份。但是，釋放孔6 2只被形成 在固定渦卷2 4之一部份，即上板6 4之底部側之區域之 故，可以縮小壓縮室48之無效容積。因此，上述構成變 成可以降低壓縮氣體之再膨脹損失，可以高效率壓縮冷媒 氣體，變成可以提高渦卷式壓縮機之信賴性。而且，不需 要使上板6 4之厚度變薄之故，可以充分確保固定渦卷 2 4之剛性。 另一方面，在冷媒氣體被壓縮之過程中，壓縮室4 8 內之壓力超過設定壓力時，閥板48抵抗螺旋彈簧70之 彈簧力，由閥座面6 6離開。如此一來，壓縮室4 8內之 冷媒氣體或液體冷媒透過釋放孔6 2、閥室6 0、貫穿孔 74、76被排出於吐出壓室18內，在過壓縮時以及液 體壓縮時，可以防止機械損失、洩漏損失以及餘面損傷。 經濟部智慧財產局員工消費合作社印製 如此，如依據本實施形態，在固定渦卷2 4之上板 6 4之區域連續形成釋放孔6 2與閥室6 0，在閥室6 0 內配設釋放控制閥5 8之故，不使上板6 4之厚度變薄， 即，一面可以充分確保剛性，一面可以縮小壓縮室4 8內 之無效容積，可以降低壓縮氣體之再膨脹損失之同時，可 以有助於壓縮效率之提升。 又，如依據前述實施形態，使閥室6 0之剖面積以及 各貫穿孔7 4、7 6之合計剖面積比釋放孔6 2之剖面積 大之故，可以充分確保壓縮氣體以及液體冷媒之流路之同 時，也可以降低流路阻力。 如以上說明般地，如依據本發明，不損及固定渦卷之 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） ~ -11 - 508411 A7 B7 --- ---—''—"" 1 - ------- 五、發明説明（9) 剛性，可以縮小壓縮室之無效容積之同時，可以縮小再膨 脹容積，變成可以有助於壓縮效率之提升° (請先閲讀背面之注意事項再填寫本頁) ®面之簡單說明 圖1係顯示本發明之一實施形態之渦卷式壓縮機之縱 剖面圖。 圖2係壓縮機構部之剖面圖。 圖3係釋放控制閥之放大剖面圖。 主要元件對照表 14 吸入口 18 吐出壓室 20 壓縮機構部 2 2 電動機 2 4 固定渦卷 2 6 旋轉渦卷 2 8 轉子 經濟部智慧財產局員工消費合作社印製 3 0 定子 3 2 曲柄軸 3 6 機架 3 8 吐出口 4 4 餘面 4 8 壓縮室 5 0 偏心軸 本紙張尺度適用中國國家標準（CNS ) A4規格（21〇><297公釐） -12- 508411 A7 B7 五、發明説明（你 5 2 歐丹環 5 4 油通路 6 0 閥室 6 2 釋放孔 (請先閲讀背面之注意事項再填寫本頁) 經濟部智慧財產局員工消費合作社印製 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） -13-508411 A7 B7 V. Description of the invention (1) Background of the invention (please read the notes on the back before filling out this page) This invention relates to scroll compressors, especially to scrolls for refrigerants suitable for compressing air conditioners or refrigeration Scroll compressor. When scroll compressors are used as compressors for room air conditioners, etc., the scroll compressors are used under a wide range of operating conditions. Under that operating condition, scroll compressors cannot avoid running in an over-compressed state or a liquid-compressed state. Therefore, scroll compressors are often used in structures that can withstand over-compression and liquid compression. Printed by the Employees' Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs. One of the general configurations of scroll compressors with a structure to prevent over-compression and liquid compression is as follows. First, the discharge pressure chamber is formed in a closed container having a suction port and a discharge port. The motor and compression mechanism are housed in this discharge chamber. The compression mechanism unit includes a fixed scroll having a scroll-like gas passage, and a rotating scroll configured to be relatively movable with the fixed scroll and having a scroll-like remaining surface. The orbiting scroll is connected to an eccentric shaft that is eccentric to a crank shaft that is rotationally driven by a motor while preventing the orbiting of the orbiting scroll from rotating while rotating the orbit of the orbiting scroll. In addition, driven by a motor, the orbiting scroll is sucked into the suction chamber between the fixed scroll and the orbiting scroll while shaking, and the sucked refrigerant is sequentially introduced into the compression chamber between the fixed scroll and the orbiting scroll. The compressed refrigerant is discharged through the discharge port through the discharge pressure chamber. Furthermore, in such a scroll compressor, the fixed scroll is arranged on the upper plate of the fixed scroll as a release hole that connects the compression chamber and the discharge pressure chamber with a through hole and a release control valve that opens and closes the release hole ( dispose). This paper size is applicable to Chinese National Standard (CNS) A4 specification (210X297 mm) -4- 508411 A7 ΒΊ ___ V. Description of the invention (2) (Please read the precautions on the back before filling this page) Release the control valve in the compression project In the middle, when the pressure in the compression chamber becomes higher than the discharge pressure or based on temperature conditions, etc., when the liquid refrigerant is compressed by the sucked liquid from the suction port, the release hole is opened, and the pressure rising gas or liquid refrigerant is discharged from the compression chamber. Spit out the pressure chamber. Therefore, by releasing the control valve, the loss of the compression mechanism of the scroll compressor due to mechanical friction between the fixed scroll and the orbiting scroll is reduced, and damage to the remaining surface of each scroll is prevented. Printed by the Ministry of Economic Affairs, Intellectual Property Bureau, Consumer Cooperatives. However, in the structure of the release control valve of the conventional scroll compressor, control is provided at the end of the release hole that connects the compression chamber and the discharge pressure chamber on the fixed scroll. For the valve body, the release hole becomes part of the compression chamber. That is, the volume of the release hole becomes the re-expansion volume as the ineffective volume of the compression chamber. That is, when the gas introduced into the compression chamber is compressed at a predetermined pressure, a part of the gas in the compression chamber enters the release hole. In addition, the compressed gas should be re-expanded in the release hole, and the pressure of the gas in the compression chamber drops below a predetermined pressure, resulting in a reduction in the volumetric efficiency of the compression mechanism. In order to reduce the loss due to this re-expansion, if the volume of the release hole is made smaller, this purpose can be achieved. In addition, simply reducing the inner diameter of the release hole and thinning the upper plate of the fixed scroll can also achieve the effect of achieving this purpose. However, in the structure in which the inside diameter of the release hole is reduced, especially when the liquid is compressed, the liquid refrigerant is detached poorly, and the purpose as a release valve cannot be achieved. On the other hand, in the structure for reducing the thickness of the upper plate, based on the discharge pressure during operation, J: the plate is deformed, and among the compression mechanism parts, mechanical friction between the fixed scroll and the orbiting scroll is particularly caused. At the same time, it also leads to the application of the Chinese National Standard (CNS) A4 specification (210X297 mm) for this paper size. -5- 508411 A7 B7 V. Description of the invention (3) The compression performance is reduced due to the leakage of liquid refrigerant. (Please read the precautions on the back before filling this page) Summary of the invention The object of the present invention is to provide a scroll compressor that can reduce the re-expanding volume in the compression chamber without compromising the rigidity of the fixed scroll. In order to solve the aforementioned problems, the discharge pressure chamber of the scroll compressor system of the present invention is formed in a closed container having a suction port and a discharge port, and a motor and a compression mechanism portion connected to the motor are housed in a protruding pressure chamber and compressed. The mechanism includes a fixed scroll that is fixed to a hermetic container and has a spiral-shaped gas passage that connects the suction port and the discharge port facing the discharge pressure chamber; The orbiting scroll, which is driven by the driving force of the motor, forms a suction chamber and a compression chamber by the gas path of the fixed scroll and the remaining surface of the orbiting scroll. In the fixed scroll, the release hole connected to the compression chamber and the discharge The valve chambers of the pressure chamber are continuous with each other. When the pressure in the compression chamber exceeds a set pressure, a release control valve for discharging the fluid in the compression chamber into the discharge pressure chamber is installed in the valve chamber. In the scroll compressor of the present invention, the following elements may be appropriately added. Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs. (1) The scroll is tied to prevent the rotation of the scroll, and to make the scroll At the same time as the Ordane ring in the revolution movement, it is connected to the eccentric shaft that is eccentrically fixed to the crank shaft that is rotationally driven by the motor, and converts the rotational movement of the crank shaft into an eccentric shaft that swings. ). The frame is fixed in a closed container, and can support the crank shaft rotatably, forming the movement path of the Ondan ring. This paper size applies Chinese National Standard (CNS) A4 (210X297 mm) -6-508411 A7 B7 V. Description of the invention (4) (2) The release hole and the valve chamber form a fluid path connecting the compression chamber and the discharge chamber. (3) The valve seat surface is provided at the boundary with the release hole of the valve chamber. The release valve is equipped with a valve plate installed on the valve seat surface, an elastic body pressing the valve plate on the plate surface side, and a bush fixed in the valve chamber to support the elastic body. (4) The bush is pressed into the valve chamber to be fixed, and the bush has a through hole connecting the valve chamber and the discharge chamber. (5) The bushing includes a plurality of through holes. The cross-sectional area of the entire ti of the plurality of through holes is larger than the cross-sectional area of the release hole. As a fluid path connecting the compression chamber and the discharge pressure chamber, the fixed scroll has a structure in which the release hole and the valve chamber are continuous with each other. The release control valve is installed in the valve chamber, so that the thickness of the fixed scroll is not reduced, that is, it is not damaged. And the rigidity of the fixed scroll can reduce the invalid volume of the compression chamber while reducing the re-expansion volume, which can reduce the re-expansion loss, mechanical friction loss and leakage loss, and contribute to the improvement of compression efficiency. v Also, by making the cross-sectional area of the valve chamber larger than the cross-sectional area of the release hole, the flow path of the compressed gas and the liquid refrigerant can be sufficiently ensured, and the flow path resistance can be reduced. Description of a suitable embodiment An embodiment of the present invention will be described below with reference to the drawings. Fig. 1 is a longitudinal sectional view showing a scroll compressor according to an embodiment of the present invention. In FIG. 1, a scroll compressor 10 is provided with a hermetically sealed container 12 made of iron. The size of the secret paper is in accordance with the Chinese National Standard (CNS) A4 (210X297 mm) (please read the precautions on the back before filling out this page), and then fill in the item printed by the Intellectual Property Bureau of the Ministry of Economic Affairs, Consumer Consumption Cooperative 508411 A7 ___ B7 5. Description of the invention (5) The closed container 12 is almost formed into a cylindrical shape, and the upper and lower portions are blocked. The upper part of the hermetic container 12 has a suction port 14, the side of the hermetic container 12 has a discharge port 16, and the hermetic container 12 has a discharge pressure chamber 1 8 inside. The compression mechanism part 20 and the motor 22 are housed in Spit out the pressure chamber 1 8. The compression mechanism section 20 includes a fixed scroll 24 and a rotary scroll 26, and the motor 22 includes a rotor 28 and a stator 30. The rotor 28 is fixed to the outer peripheral side of the crank shaft 32. The fixed scroll 24 is formed into a substantially disc shape using, for example, cast iron, and is fixed to the frame 36 by screws 34. The frame 36 is fixed to the inner wall surface of the closed container 12 by welding on its outer peripheral side. As shown in FIG. 2, the fixed scroll 24 includes a gas passage 40 connecting a suction port 14 and a discharge port 38 facing the discharge pressure chamber 18. The gas passage 40 is formed into a spiral shape by a spiral-shaped remaining surface 42. The orbiting scrolls 26, which are formed almost in a disc shape, can be placed freely with respect to the fixed scrolls 24. As shown in FIG. 2, a spiral-shaped residual surface 4 4 meshing with the residual surface 4 2 of the fixed scroll 24 is formed on the upper side of the orbiting scroll 26. The suction chamber 46 and the compression chamber 48 are formed between the remaining surface 4 2 and the remaining surface 4 4. The bottom side of the orbiting scroll 26 is connected to the eccentric shaft 50. The eccentric shaft 50 is arranged eccentrically with respect to the crank shaft 32, and is formed integrally with the crank shaft 3 2. The crankshaft 32 is driven into rotation by the motor 22. The driving force of the crank shaft 32 is transmitted to the eccentric shaft 50. In this case, the eccentric shaft 50 is a rocking motion centered on the crank shaft 32. That is, 3 2 —The size of the paper is applicable to the Chinese National Standard (CNS) A4 (210X 297 mm) (Please read the note on the back-> then fill in-: write this page) Employees of the Intellectual Property Bureau of the Ministry of Economic Affairs Printed by the Consumer Cooperative -8- 508411 A7 B7 V. Description of the invention (6) Rotational movement. This rotational movement is converted into shaking motion by the eccentric shaft 50. The ondan ring 5 2 is arranged between the bottom side of the orbiting scroll 26 and the frame 36. The ondan ring 5 2 is moved in a cross direction between a groove formed on the bottom side of the orbiting scroll 26 and a groove formed on the upper side of the frame 36. That is, on the other hand, the ondan ring 5 2 prevents the rotation of the orbiting scroll 26 from orbiting. In addition, the frame 36 is provided with a bearing 3 6 a that rotatably supports the crank shaft 3 2, and an oil passage 5 4 formed in a central portion of the crank shaft 32 is provided, and oil in the chamber 5 6 is supplied to the bearing. 3 6 a or eccentric shaft 5 0. That is, an intermediate pressure chamber that becomes an intermediate pressure between the pressure in the suction port 14 and the pressure in the discharge pressure chamber 18 is formed between the eccentric shaft 50 and the orbiting scroll 26, and the pressure in the intermediate pressure chamber and the discharge pressure The pressure difference between the chamber pressure and the oil in the chamber 56 is supplied to the bearing 3 6 a through the oil passage 54. The gas (refrigerant) is introduced through the suction port 14 and is compressed by the rocking motion of the orbiting scroll 26. When the gas in the compression chamber 48 becomes the discharge pressure or higher, the gas in the compression chamber 48 is discharged. In the discharge pressure chamber 18, in the present embodiment, a total of 4 release control valves 5 8 are disposed in the fixed scroll 24. At the same time, the fixed scroll 2 has four valve chambers 60 and release holes 62. As shown in FIG. 3, each valve chamber 60 and each release hole 62 are formed as a fluid passage connecting the compression chamber 48 and the discharge pressure chamber 18, and the release hole 62 and the valve chamber 60 are continuously formed with each other. The chamber 60 is formed so as to communicate with the discharge pressure chamber 18. As a result, the release hole 62 communicates with the compression chamber 48. Moreover, in each valve chamber 60, the pressure in the compression chamber 4 8 exceeds the set pressure. The paper size applies the Chinese National Standard (CNS) A4 specification (210X297 mm) (please read the precautions and items on the back first) ·: Write this page) Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs-9- 508411 Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs A7 B7 丨 丨---V. When the description of the invention (7), the room 48 will be compressed A release control valve 58 that discharges the internal fluid into the discharge pressure chamber 18 is provided. That is, the valve chamber 60 and the release hole 62 are formed in the thickness direction of the plate 64 on the fixed scroll 24, so that the cross-sectional area of the valve chamber 60 is larger than the cross-sectional area of the release hole 62. In the valve chamber 60, a valve seat surface 66 is formed in a ring shape at a boundary with the release hole 62. A disc-shaped valve seat 6 8 made of iron is mounted on the valve seat surface 6 6. A coil spring 70, which is an elastic body that presses the valve seat 68 on the valve seat surface 66 side, is mounted on the valve seat 68. The coil spring 70 is mounted on the projecting portion 74 of the iron bush 72 which is pressed into the upper side of the valve chamber 60 and is fixed. The bushing 7 2 is provided with a through hole 7 4 in the center. A plurality of through holes 7 6 are arranged around the through holes 74. The total of the cross-sectional areas of the respective through holes 7 4 and 76 (the entire cross-sectional area) is larger than the cross-sectional area of the release hole 62. In the above-mentioned configuration, the motor 22 is rotationally driven, and the orbiting scroll 26-swinging motion, and the gas (refrigerant gas) introduced into the suction port 14 is sequentially introduced into the suction chamber 46. The introduced gas is sequentially sent into the compression chambers 48 in accordance with the shaking motion of the orbiting scroll 26, and is compressed in each of the compression chambers 48. The gas compressed under a certain compression ratio is discharged into the discharge pressure chamber 18 through the discharge port 38, and the gas in the discharge pressure chamber 18 is discharged through the pipe 7 8 through the discharge port 16. When the refrigerant gas is compressed, when the pressure in the compression chamber 48 is lower than the set pressure (discharge pressure + spring force of the coil spring 70), each of the release holes 62 is supported by the spring force of the coil spring 70. The valve seat 68 of each release control valve 48 is blocked, and each valve chamber 60 is blocked from the compression chamber 48. In this case, the volume of the release hole 62 becomes the size of the paper applicable to the Chinese National Standard (CNS) A4 specification (210X297 mm) " ~ -10- (Please read the precautions on the back-items before filling-filling- : Write this page) Order 508411 A7 __ £ 7 _ ^ ___ V. Description of the invention (8) (Please read the notes on the back before filling this page) Part of the volume of the compression chamber 48. However, the release hole 62 is formed only in a part of the fixed scroll 24, that is, the area on the bottom side of the upper plate 64, so that the ineffective volume of the compression chamber 48 can be reduced. Therefore, the above configuration can reduce the re-expansion loss of the compressed gas, can compress the refrigerant gas with high efficiency, and can improve the reliability of the scroll compressor. In addition, since the thickness of the upper plate 64 is not required to be reduced, the rigidity of the fixed scroll 24 can be sufficiently ensured. On the other hand, when the refrigerant gas is compressed, when the pressure in the compression chamber 4 8 exceeds the set pressure, the valve plate 48 resists the spring force of the coil spring 70 and is separated from the valve seat surface 6 6. In this way, the refrigerant gas or liquid refrigerant in the compression chamber 48 is discharged into the discharge pressure chamber 18 through the release hole 6 2, the valve chamber 60, and the through holes 74 and 76. During the over-compression and the liquid compression, it is possible to Prevent mechanical loss, leakage loss and damage to the surface. This is printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs. According to this embodiment, the release hole 6 2 and the valve chamber 60 are formed continuously in the area of the upper plate 64 of the fixed scroll 24, and the valve chamber 60 is provided in the valve chamber 60. The release control valve 5 8 is provided so that the thickness of the upper plate 64 is not reduced, that is, while the rigidity can be fully ensured, the invalid volume in the compression chamber 4 8 can be reduced, and the re-expansion loss of the compressed gas can be reduced. , Can help improve compression efficiency. In addition, according to the foregoing embodiment, the cross-sectional area of the valve chamber 60 and the total cross-sectional area of each of the through holes 74, 76 are larger than the cross-sectional area of the release hole 62, so that the compressed gas and liquid refrigerant can be sufficiently ensured At the same time as the flow path, the flow path resistance can also be reduced. As explained above, according to the present invention, the paper size of the fixed scroll is not affected by the Chinese National Standard (CNS) A4 (210X297 mm) ~ -11-508411 A7 B7 --- --- ' '— &Quot; " 1-------- 5. Description of the invention (9) Rigidity can reduce the invalid volume of the compression chamber while reducing the re-expansion volume, which can help to improve the compression efficiency ° (Please read the precautions on the back before filling out this page.) Brief description on the front Figure 1 is a longitudinal sectional view of a scroll compressor according to an embodiment of the present invention. Fig. 2 is a sectional view of a compression mechanism section. Figure 3 is an enlarged sectional view of a release control valve. Comparison table of main components 14 Intake port 18 Outlet pressure chamber 20 Compression mechanism section 2 2 Motor 2 4 Fixed scroll 2 6 Rotary scroll 2 8 Printed by the Consumer Cooperative of the Intellectual Property Office of the Ministry of Economy 3 0 Stator 3 2 Crankshaft 3 6 Frame 3 8 Ejection outlet 4 4 Remaining surface 4 8 Compression chamber 5 0 Eccentric shaft The paper size is applicable to China National Standard (CNS) A4 specification (21〇 > < 297 mm) -12- 508411 A7 B7 V. Invention Instructions (you 5 2 Ondan ring 5 4 oil passage 6 0 valve chamber 6 2 release hole (please read the precautions on the back before filling out this page) Printed on the paper by the Intellectual Property Bureau of the Ministry of Economic Affairs Consumer Cooperatives This paper applies Chinese national standards (CNS ) A4 size (210X297mm) -13-