JPH0815239A - Device for detecting percentage of refrigerant mixed in lubricating oil in container and detecting quantity of oil therein - Google Patents
Device for detecting percentage of refrigerant mixed in lubricating oil in container and detecting quantity of oil thereinInfo
- Publication number
- JPH0815239A JPH0815239A JP6144459A JP14445994A JPH0815239A JP H0815239 A JPH0815239 A JP H0815239A JP 6144459 A JP6144459 A JP 6144459A JP 14445994 A JP14445994 A JP 14445994A JP H0815239 A JPH0815239 A JP H0815239A
- Authority
- JP
- Japan
- Prior art keywords
- lubricating oil
- sensor holder
- container
- cylindrical
- oil
- 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.)
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Links
Landscapes
- Applications Or Details Of Rotary Compressors (AREA)
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は冷凍圧縮機及び空気調和
機、冷凍機等の冷凍装置、等における潤滑油中の冷媒混
入率、油量検出装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a refrigerating device such as a refrigerating compressor, an air conditioner, a refrigerating device, etc., and a device for detecting an amount of refrigerant in a lubricating oil and an oil amount detecting device.
【０００２】[0002]
【従来の技術】図５は従来の冷媒混入率、油量検出装置
の構成を示すブロック図であり、この種の装置について
は、実願平４−０５３３４８号、特願平４−２６６２４
１号、特願平５−２９７５９８号に開示されているもの
である。2. Description of the Related Art FIG. 5 is a block diagram showing a configuration of a conventional refrigerant mixture rate and oil amount detecting device. Regarding this type of device, Japanese Patent Application No. 4-053348 and Japanese Patent Application No. 4-26624.
No. 1 and Japanese Patent Application No. 5-297598.
【０００３】図５において、１は密閉形電動圧縮機で、
その密閉ケーシング２内には、図示してない圧縮機構、
油ポンプ及びこれらを駆動するための電動機が内蔵さ
れ、かつ、密閉ケーシング２底部の油溜め３には圧縮機
構等を潤滑するための潤滑油Ｌが貯溜されている。この
圧縮機１で圧縮されたガス冷媒は吐出管４から吐出さ
れ、図示しない凝縮器、膨張機構、蒸発器等を経て吸入
管５から密閉ハウジング２内に吸入される。このとき、
潤滑油Ｌは油ポンプによって、圧縮機構に送られ、その
摺動部分の潤滑や冷却を行った後に油溜め３に戻る。In FIG. 5, reference numeral 1 is a hermetic electric compressor,
In the closed casing 2, a compression mechanism (not shown),
An oil pump and an electric motor for driving them are built in, and a lubricating oil L for lubricating a compression mechanism and the like is stored in an oil sump 3 at the bottom of the closed casing 2. The gas refrigerant compressed by the compressor 1 is discharged from the discharge pipe 4, and is sucked into the closed housing 2 from the suction pipe 5 through a condenser, an expansion mechanism, an evaporator and the like (not shown). At this time,
Lubricating oil L is sent to a compression mechanism by an oil pump, lubricates and cools the sliding portion, and then returns to oil sump 3.
【０００４】この圧縮機１の密閉ケーシング２の底壁６
の外側面には底壁６を貫通して、超音波センサ７を内蔵
した円筒状のセンサホルダ８が超音波発射方向を鉛直方
向にして取付けられている。The bottom wall 6 of the closed casing 2 of the compressor 1
A cylindrical sensor holder 8 having a built-in ultrasonic sensor 7 is attached to the outer surface of the penetrating through the bottom wall 6 with the ultrasonic wave emitting direction being the vertical direction.
【０００５】また、油溜め３内には、潤滑油Ｌの最低許
容液面レベルよりも若干低い位置にセンサホルダ８に対
向させて反射板９が配置されており、この反射板９の外
周面は密閉ケーシング２の内周面に固定されている。A reflector 9 is arranged in the oil sump 3 so as to face the sensor holder 8 at a position slightly lower than the minimum permissible liquid surface level of the lubricating oil L. Is fixed to the inner peripheral surface of the closed casing 2.
【０００６】演算制御装置１０は測定回路１１と、演算
回路１２と、検出回路１３とから構成されており、測定
回路１１には超音波センサ７がリード線１４を介して接
続されている。測定回路１１は超音波センサ７を動作さ
せ、超音波センサ７が発射した超音波の反射時間を測定
し、その値を演算回路１２に与える。演算回路１２は与
えられた反射時間から潤滑油中を伝播する超音波の音の
速さを演算し、その値を検出回路１３に与える。検出回
路１３は図７に示すような音速と冷媒混入率との関係を
予め記憶しており、与えられた音速に基づいて、この記
憶した特性を参照して冷媒混入率の値Ｘを出力する。The arithmetic and control unit 10 comprises a measuring circuit 11, an arithmetic circuit 12, and a detecting circuit 13, and an ultrasonic sensor 7 is connected to the measuring circuit 11 via a lead wire 14. The measurement circuit 11 operates the ultrasonic sensor 7, measures the reflection time of the ultrasonic wave emitted by the ultrasonic sensor 7, and supplies the value to the arithmetic circuit 12. The calculation circuit 12 calculates the speed of sound of ultrasonic waves propagating in the lubricating oil from the given reflection time, and gives the value to the detection circuit 13. The detection circuit 13 stores in advance the relationship between the sound velocity and the refrigerant mixture rate as shown in FIG. 7, and outputs the value X of the refrigerant mixture rate with reference to the stored characteristics based on the given sound velocity. .
【０００７】センサホルダ８は図６断面図に示すよう
に、円筒形状をしており、その端板８１の内側面に液状
ガスケット３０を塗布し、Ｃリング３１に支持されたコ
イルばね３２によって、超音波センサ７が端板８１の内
側面に圧着されている。As shown in the sectional view of FIG. 6, the sensor holder 8 has a cylindrical shape, the inner surface of the end plate 81 of which is coated with a liquid gasket 30, and a coil spring 32 supported by a C ring 31 The ultrasonic sensor 7 is pressure-bonded to the inner surface of the end plate 81.
【０００８】このような構成において、図８の超音波伝
播モデル図に示すように測定回路１１が動作して超音波
センサ７から一定の間隔で超音波３７が発射される。そ
うするとこの発射された超音波Ｓ1 はセンサホルダ８の
端板８１を通過し、端板８１と潤滑油Ｌの境界面Ｙで一
部は潤滑油Ｌ内への透過波Ｓ2 となり、他の一部は境界
面Ｙで反射され、反射波Ｎ1 となる。この透過波Ｓ2 は
潤滑油Ｌ中を通過し、反射板９の下面で反射され、反射
波Ｓ3 となる。そしてこの反射波Ｓ3 は再び潤滑油Ｌ中
を通過し、潤滑油Ｌと端板８１の境界面Ｙを透過し、透
過波Ｓ4 となる。この透過波Ｓ4 は端板８１を通過し、
超音波センサ７に戻り、受信される。In such a configuration, as shown in the ultrasonic wave propagation model diagram of FIG. 8, the measuring circuit 11 operates and the ultrasonic wave 37 is emitted from the ultrasonic wave sensor 7 at regular intervals. Then, the emitted ultrasonic wave S 1 passes through the end plate 81 of the sensor holder 8, and at the boundary surface Y between the end plate 81 and the lubricating oil L, a part thereof becomes a transmitted wave S 2 into the lubricating oil L, and other A part is reflected by the boundary surface Y and becomes a reflected wave N 1 . This transmitted wave S 2 passes through the lubricating oil L and is reflected by the lower surface of the reflection plate 9 to become a reflected wave S 3 . Then, this reflected wave S 3 again passes through the lubricating oil L, passes through the boundary surface Y between the lubricating oil L and the end plate 81, and becomes a transmitted wave S 4 . This transmitted wave S 4 passes through the end plate 81,
It returns to the ultrasonic sensor 7 and is received.
【０００９】一方、反射波Ｎ1 は端板８１と超音波セン
サ７の境界面Ｚで超音波センサ７に受信され、境界面Ｚ
で反射した反射波Ｎ2 は再び境界面Ｙで反射し、反射波
Ｎ3が超音波センサ７で受信され、以後これが繰り返さ
れる。この繰り返しによって反射波Ｎ2n-1（ｎは整数）
は減衰していく。On the other hand, the reflected wave N 1 is received by the ultrasonic sensor 7 at the boundary surface Z between the end plate 81 and the ultrasonic sensor 7, and the boundary surface Z
The reflected wave N 2 reflected by is reflected again on the boundary surface Y, the reflected wave N 3 is received by the ultrasonic sensor 7, and this is repeated thereafter. By repeating this, the reflected wave N 2n-1 (n is an integer)
Diminishes.
【００１０】しかし、センサホルダ８には円筒部分８２
が存在すること、超音波センサ７から発射された超音波
（ビーム）の伝播方向は全てが鉛直方向ではないこと、
等のため、センサホルダ８内での実際の反射状況は図９
に一例を示すように複雑となっている。このように、超
音波センサ７の受信波には反射板９からの反射波とセン
サホルダ８内での反射波があり、前者を信号、後者をノ
イズと定義する。However, the sensor holder 8 has a cylindrical portion 82.
Exists, and the propagation directions of the ultrasonic waves (beams) emitted from the ultrasonic sensor 7 are not all vertical,
Therefore, the actual reflection situation in the sensor holder 8 is as shown in FIG.
It is complicated as an example. As described above, the received wave of the ultrasonic sensor 7 includes the reflected wave from the reflection plate 9 and the reflected wave in the sensor holder 8, and the former is defined as a signal and the latter is defined as noise.
【００１１】従って、図１０の受信波形図に示すように
超音波センサ７からの発信波３７を発信し、その反射板
９からの反射波Ｓ4 が第１信号３３として受信され、セ
ンサホルダ８内での反射波Ｎ1 ，Ｎ3 ，〜Ｎ2n-1（ｎは
整数）がノイズ３８として受信されることとなる。な
お、Ｓ3 の潤滑油Ｌと端板８１の境界面Ｙでの反射波は
再び反射板９の下面で反射され、境界面Ｙを透過した波
は第２信号３４として受信される。そうして、図１０に
示すように第１、第２、第３信号３３，３４，３５のよ
うな受信波形が得られる。Therefore, as shown in the reception waveform diagram of FIG. 10, the transmitted wave 37 from the ultrasonic sensor 7 is transmitted, and the reflected wave S 4 from the reflecting plate 9 is received as the first signal 33, and the sensor holder 8 It reflected wave n 1 of the inner, n 3, ~N 2n-1 (n is an integer) so that the is received as noise 38. The reflected wave of S 3 at the boundary surface Y between the lubricating oil L and the end plate 81 is reflected again on the lower surface of the reflection plate 9, and the wave transmitted through the boundary surface Y is received as the second signal 34. Then, as shown in FIG. 10, received waveforms such as the first, second and third signals 33, 34 and 35 are obtained.
【００１２】測定回路１１ではこの受信波形にフィル
タ、波形処理等を行い、超音波センサ７から発射された
超音波Ｓ1 が反射板９からの反射波Ｓ4 として戻るまで
の所要時間ｔが測定される。The measuring circuit 11 filters and processes the received waveform, and measures the time t required for the ultrasonic wave S 1 emitted from the ultrasonic sensor 7 to return as a reflected wave S 4 from the reflector 9. To be done.
【００１３】ところで、センサホルダ端板８１の上面か
ら反射板の下面までの距離をｈ1 、潤滑油Ｌ内の音速を
ｖ1 、端板８１の厚みをｈ2 、端板８１内の音速をｖ2
とすると、次の関係が成立する。By the way, the distance from the upper surface of the sensor holder end plate 81 to the lower surface of the reflector is h 1 , the speed of sound in the lubricating oil L is v 1 , the thickness of the end plate 81 is h 2 , and the speed of sound in the end plate 81 is v 2
Then, the following relationship holds.
【００１４】ｔ＝（２ｈ1 ／ｖ1 ）＋（２ｈ2 ／ｖ2 ） ここで、ｈ1 ，ｈ2 ，ｖ2 は一定であるため、ｔが測定
されれば、潤滑油Ｌ内の音速ｖ1 が求まり、この音速ｖ
1 が演算回路１２によって算出される。そして、算出値
が検出回路１３に与えられ、検出回路１３内に記憶して
いる図７に示すような関係から音速ｖ1 に対応した冷媒
混入率Ｃが検出される。T = (2h 1 / v 1 ) + (2h 2 / v 2 ) Here, since h 1 , h 2 and v 2 are constant, the sound velocity in the lubricating oil L is measured if t is measured. v 1 is found, and this speed of sound v
1 is calculated by the arithmetic circuit 12. Then, the calculated value is given to the detection circuit 13, and the refrigerant mixture rate C corresponding to the sound velocity v 1 is detected from the relationship stored in the detection circuit 13 as shown in FIG. 7.
【００１５】この検出された冷媒混入率Ｘの値は、図示
しない空調機制御装置に入力され、所定の値以上になっ
たときは圧縮機１の運転を停止させること等によって、
焼付等を未然に防止するようにしている。The detected value of the refrigerant mixture rate X is input to an air conditioner control device (not shown), and when it exceeds a predetermined value, the operation of the compressor 1 is stopped, and the like.
It is designed to prevent seizure and the like.
【００１６】以上、従来の冷媒混入率検出装置による冷
媒混入率検出について説明したが、本装置によって油溜
め３内に貯溜される潤滑油Ｌの油量についても同様に、
その油量と音速の変化から検出可能であるが、この説明
は割愛する。The detection of the refrigerant mixture rate by the conventional refrigerant mixture rate detecting device has been described above, but the oil amount of the lubricating oil L stored in the oil sump 3 by this device is also the same.
It can be detected from the change in the amount of oil and the speed of sound, but this explanation is omitted.
【００１７】[0017]
【発明が解決しようとする課題】前記したように、従来
の装置においては、超音波センサ７には反射板９からの
反射波が信号として受信され、センサホルダ８内の反射
波も同じくノイズとして受信される。この受信波のＳＮ
比（信号音圧とノイズ音圧の比）が小さいと信号の識別
が困難である。上記、従来の潤滑油の冷媒混入率検出装
置においては、次のようにＳＮ比が小さくなる問題があ
って、測定回路１１において、信号波とノイズとの識別
ができなくなり、超音波センサ７から発射された超音波
の反射板９からの反射波が超音波センサに戻るまでの所
要時間ｔを測定できず、潤滑油中の冷媒混入率の検出や
油面検出ができなくなるという不具合があった。As described above, in the conventional device, the ultrasonic sensor 7 receives the reflected wave from the reflecting plate 9 as a signal, and the reflected wave in the sensor holder 8 also becomes noise. Be received. SN of this received wave
If the ratio (the ratio between the signal sound pressure and the noise sound pressure) is small, it is difficult to identify the signal. In the above-described conventional lubricating oil refrigerant mixing rate detection device, there is a problem that the SN ratio becomes small as follows, and the measurement circuit 11 cannot distinguish the signal wave from the noise, and the ultrasonic sensor 7 detects There was a problem that the time t required for the reflected wave of the emitted ultrasonic wave from the reflection plate 9 to return to the ultrasonic sensor could not be measured, and the refrigerant mixing ratio in the lubricating oil and the oil level could not be detected. .
【００１８】（１）超音波速度が速いとき（冷媒混入率
が低い）や経路（図５のｈ1 ）が短いときには、信号が
受信される時点で、センサホルダ８中での反射波が十分
に減衰していないため、ノイズ音圧が高く、超音波セン
サ７の受信波のＳＮ比が小さくなるという問題があっ
た。(1) When the ultrasonic velocity is high (the refrigerant mixing ratio is low) or the path (h 1 in FIG. 5) is short, the reflected wave in the sensor holder 8 is sufficient when the signal is received. Since it is not attenuated, there is a problem that the noise sound pressure is high and the SN ratio of the received wave of the ultrasonic sensor 7 is small.
【００１９】（２）反射板９をセンサホルダ８の端板８
１に平行に設置することは製作上困難である。反射板９
とセンサホルダ端板８１に傾きがあると、図１１に示す
ように、超音波センサ７から発射された超音波（ビー
ム）の反射板９からの反射波３６のように超音波センサ
７から外れ受信できないものが発生するので、信号音圧
が低下し、超音波センサ７の受信波のＳＮ比が小さくな
るという問題があった。実際には、超音波センサから発
射された超音波（ビーム）は平行ではなく若干の広がり
があるので、上記傾向は一層拡大される。(2) The reflector 9 is replaced by the end plate 8 of the sensor holder 8.
It is difficult to install in parallel with 1. Reflector 9
When the sensor holder end plate 81 is tilted, as shown in FIG. 11, the ultrasonic wave (beam) emitted from the ultrasonic sensor 7 is separated from the ultrasonic sensor 7 like a reflected wave 36 from the reflecting plate 9. Since some are unreceivable, the signal sound pressure is lowered and the SN ratio of the received wave of the ultrasonic sensor 7 is reduced. In reality, the ultrasonic waves (beams) emitted from the ultrasonic sensor are not parallel and have a slight spread, so that the above tendency is further magnified.
【００２０】[0020]
【課題を解決するための手段】本発明はこのような課題
を解決するために、円筒状センサホルダ内に超音波セン
サを取付けて潤滑油の入った容器内の反射板からの超音
波反射波の時間を測定し、潤滑油中の冷媒混入率や油量
を検出する装置において、（１）円筒状センサホルダの
円筒部に切欠きを設ける、（２）円筒状センサホルダの
端板外面を球面にする、（３）同端板外面を円筒面とす
る、（４）同端板外面をＶ字形の面として、それぞれの
構成において超音波センサの受信波のＳＮ比を大きくす
る構成とし、更に、（５）このような円筒状センサホル
ダを冷凍装置の潤滑油を貯溜した容器に取付けた検出装
置も提供する。In order to solve such a problem, the present invention has an ultrasonic sensor mounted in a cylindrical sensor holder and an ultrasonic reflected wave from a reflector in a container containing lubricating oil. In a device that measures the time of the above, and detects the refrigerant mixing ratio in the lubricating oil and the oil amount, (1) the notch is provided in the cylindrical portion of the cylindrical sensor holder, (2) the outer surface of the end plate of the cylindrical sensor holder is The spherical surface, (3) the outer surface of the same end plate is a cylindrical surface, (4) the outer surface of the same end plate is a V-shaped surface, and the SN ratio of the received wave of the ultrasonic sensor is increased in each configuration, Further, (5) there is also provided a detection device in which such a cylindrical sensor holder is attached to a container in which a lubricating oil of a refrigeration system is stored.
【００２１】即ち、本発明は、（１）潤滑油を貯溜する
容器の壁を貫通し、外側に突設した円筒状センサホルダ
と、この円筒状センサホルダの端板内面に取付けられた
超音波センサと、前記潤滑油内で前記円筒状センサホル
ダの端板外面の上方に前記超音波センサからの超音波発
射方向とほぼ垂直に前記容器内に配置された反射板と、
超音波の反射時間を測定する測定回路とを備えてなり、
前記潤滑油中の冷媒混入率及び潤滑油の液量を検出する
冷媒混入率、油量検出装置において、前記円筒状センサ
ホルダの円筒部に切欠きを設けたことを特徴とする容器
内の潤滑油中の冷媒混入率、油量検出装置を提供する。That is, according to the present invention, (1) a cylindrical sensor holder penetrating through a wall of a container for storing lubricating oil and projecting outward, and an ultrasonic wave attached to an inner surface of an end plate of the cylindrical sensor holder. A sensor; and a reflection plate disposed in the container above the outer surface of the end plate of the cylindrical sensor holder in the lubricating oil and substantially perpendicular to the ultrasonic wave emission direction from the ultrasonic sensor,
It is equipped with a measuring circuit for measuring the reflection time of ultrasonic waves,
Lubrication in a container, characterized in that a notch is provided in the cylindrical portion of the cylindrical sensor holder in the refrigerant mixing ratio for detecting the refrigerant mixing ratio in the lubricating oil and the liquid amount of the lubricating oil, and the oil amount detecting device. Provided is a device for detecting a mixture ratio of a refrigerant in oil and an oil amount.
【００２２】又、（２）前述の（１）の前提となる円筒
状センサホルダ、超音波センサ、反射板、測定回路とを
備えた冷媒混入率、油量検出装置において、前記円筒状
センサホルダの超音波発信面となる前記端板外面に球面
加工を施し、同球面を前記潤滑油に接触せしめると共
に、前記反射板を前記球面の焦点距離内に配置したこと
を特徴とする容器内の潤滑油中の冷媒混入率、油量検出
装置を提供する。Further, (2) in the refrigerant mixture ratio and oil amount detection device provided with the cylindrical sensor holder, the ultrasonic sensor, the reflection plate, and the measuring circuit which is the premise of the above-mentioned (1), the cylindrical sensor holder Lubrication inside the container characterized in that the outer surface of the end plate, which serves as the ultrasonic wave transmitting surface, is subjected to spherical surface processing, the spherical surface is brought into contact with the lubricating oil, and the reflection plate is arranged within the focal length of the spherical surface. Provided is a device for detecting a mixture ratio of a refrigerant in oil and an oil amount.
【００２３】又、（３）前述の前提となる円筒状センサ
ホルダ、超音波センサ、反射板、測定回路とを備えた冷
媒混入率、油量検出装置において、前記円筒状センサホ
ルダの超音波発信面となる前記端板外面に円筒面加工を
施し、同円筒面を前記潤滑油に接触せしめると共に、前
記反射板を前記円筒面の焦点距離内に配置したことを特
徴とする容器内の潤滑油中の冷媒混入率、油量検出装置
を提供する。(3) In the refrigerant mixture rate and oil amount detection device provided with the cylindrical sensor holder, the ultrasonic sensor, the reflection plate, and the measurement circuit, which are the above-mentioned prerequisites, the ultrasonic transmission of the cylindrical sensor holder is performed. The outer surface of the end plate serving as a surface is subjected to a cylindrical surface processing, the cylindrical surface is brought into contact with the lubricating oil, and the reflecting plate is arranged within the focal length of the cylindrical surface. Provided is a refrigerant mixing ratio and oil amount detection device.
【００２４】又、（４）前述の前提となる円筒状センサ
ホルダ、超音波センサ、反射板、測定回路とを備えた冷
媒混入率、油量検出装置において、前記円筒状センサホ
ルダの超音波発信面となる前記端板外面にＶ字平面加工
を施し、同Ｖ字平面を前記潤滑油に接触せしめると共
に、前記反射板の前記Ｖ字平面底部からの距離を、前記
円筒状センサホルダの円筒外径をｄ、同Ｖ字面の平面と
なす角度をθとしてｄ／４ｔａｎθ以内に配置したこと
を特徴とする容器内の潤滑油中の冷媒混入率、油量検出
装置を提供する。(4) In the refrigerant mixture rate and oil amount detection device provided with the cylindrical sensor holder, the ultrasonic sensor, the reflection plate, and the measuring circuit, which are the above-mentioned prerequisites, the ultrasonic transmission of the cylindrical sensor holder is performed. The outer surface of the end plate serving as a surface is subjected to a V-shaped plane processing, the V-shaped plane is brought into contact with the lubricating oil, and the distance from the bottom surface of the V-shaped plane of the reflection plate is set to the outside of the cylinder of the cylindrical sensor holder. Disclosed is a device for detecting the amount of refrigerant mixed in lubricating oil in a container and an oil amount detecting device, which is arranged within d / 4 tan θ, where d is the diameter and θ is the angle formed with the plane of the same V-shaped surface.
【００２５】更に、（５）として、（１）〜（４）のい
ずれかの発明において、前記円筒状センサホルダが冷凍
圧縮機、空気調和機、冷凍機等の冷凍装置の潤滑油を貯
溜する容器に具備したことを特徴とする容器内の潤滑油
中の冷媒混入率、油量検出装置も提供する。Further, as (5), in the invention of any one of (1) to (4), the cylindrical sensor holder stores the lubricating oil of a refrigerating device such as a refrigerating compressor, an air conditioner, or a refrigerator. There is also provided a device for detecting the amount of refrigerant mixed in a lubricating oil in a container and an oil amount, which is provided in the container.
【００２６】[0026]
【作用】本発明は前述の手段により、（１）の発明にあ
っては、円筒状センサホルダの円筒部に切欠きが設けら
れているので、一定時間内の円筒状センサホルダ内での
超音波の反射回数が増加し、円筒状センサホルダ内の反
射波（ノイズ）の減衰が大きくなる。その結果、ノイズ
が低下するのでＳＮ比が大きくなり、信号の識別が容易
となる。According to the present invention, according to the invention of (1), the notch is provided in the cylindrical portion of the cylindrical sensor holder, so that the cylindrical sensor holder has a cutout within a predetermined time. The number of reflections of sound waves increases, and the attenuation of reflected waves (noise) in the cylindrical sensor holder increases. As a result, noise is reduced, the SN ratio is increased, and the signal can be easily identified.
【００２７】（２）の発明にあっては、円筒状センサホ
ルダの端板外面（超音波受発信面）に球面加工が施さ
れ、容器内の潤滑油に直接接触せしめられ、反射板が上
記球面の焦点距離内に配置されているので、反射板から
の反射波（信号）が円筒状センサホルダ端板外面の中心
部に集束する。その結果、超音波センサに受信されない
反射波が減少して受信波の信号が大きくなり、ＳＮ比が
改善され、信号の受信、演算、検出が容易となるもので
ある。In the invention of (2), the outer surface of the end plate (ultrasonic wave transmitting / receiving surface) of the cylindrical sensor holder is subjected to a spherical surface treatment so that it is brought into direct contact with the lubricating oil in the container, and the reflecting plate is formed as described above. Since it is arranged within the focal length of the spherical surface, the reflected wave (signal) from the reflecting plate is focused on the center of the outer surface of the cylindrical sensor holder end plate. As a result, the reflected wave not received by the ultrasonic sensor is reduced, the signal of the received wave is increased, the SN ratio is improved, and the signal is easily received, calculated, and detected.
【００２８】（３）の発明にあっては、円筒状のセンサ
ホルダの端板外面に円筒加工が施されている以外は
（２）の発明と同様の構成を有するので、（２）の発明
と同様の作用を奏する。ただし、反射波の集束の度合い
は（２）の発明よりも低下するが、加工容易という利点
がある。The invention of (3) has the same structure as that of the invention of (2) except that the outer surface of the end plate of the cylindrical sensor holder is cylindrically processed. Has the same effect as. However, although the degree of focusing of the reflected wave is lower than that of the invention of (2), it has an advantage of easy processing.
【００２９】（４）の発明にあっては、円筒状センサホ
ルダの端板外面にＶ字平面が形成され、反射板のＶ字平
面底部からの距離をｄ／４ｔａｎθ以内に配置されてお
り、それ以外は（２）の発明と同様の構成を有するの
で、（２）の発明と同様の作用を奏する。ただし、反射
波の集束の度合いは（２）の発明よりも低下するが加工
容易という利点がある。In the invention of (4), the V-shaped plane is formed on the outer surface of the end plate of the cylindrical sensor holder, and the distance from the bottom of the V-shaped plane of the reflection plate is arranged within d / 4 tan θ. Other than that, it has the same configuration as the invention of (2), so that the same operation as the invention of (2) is achieved. However, although the degree of focusing of the reflected wave is lower than that of the invention of (2), there is an advantage that processing is easy.
【００３０】更に、（５）の発明にあっては、空気調和
機、冷凍機等の冷凍装置に搭載された冷凍圧縮機の油溜
め容器に（１）〜（４）の発明の検出装置が適用される
ので、この容器の潤滑油中の冷媒混入率及び油量を圧縮
機を停止しないで、運転中に検出することができる。Further, in the invention of (5), the detection device of the inventions of (1) to (4) is provided in an oil sump container of a refrigerating compressor mounted in a refrigerating device such as an air conditioner or a refrigerator. Since it is applied, the mixing ratio and the amount of oil in the lubricating oil of this container can be detected during operation without stopping the compressor.
【００３１】[0031]
【実施例】以下、本発明の実施例を図面に基づいて、具
体的に説明する。図１は本発明の第１実施例に係る容器
内の潤滑油中の冷媒混入率、油量検出装置におけるセン
サホルダで、（ａ）は側面図、（ｂ）はそのＡ−Ａ矢視
図である。図において、センサホルダ１５の内部には図
６に示す従来例と同じく超音波センサ７がコイルばね３
２、リード線１４と共に液状ガスケット３０を介して取
付けられ、リード線１４で演算制御装置１０に接続され
ているが、図示を省略し、ホルダのみを図示している。
このセンサホルダ１５の円筒部１５ａには数個（図では
４個）の切欠き１６が設けられている。Embodiments of the present invention will be specifically described below with reference to the drawings. 1A and 1B are a sensor holder in a refrigerant mixing ratio in a lubricating oil in a container and an oil amount detecting device according to a first embodiment of the present invention, FIG. 1A is a side view, and FIG. Is. In the figure, an ultrasonic sensor 7 is provided inside the sensor holder 15 as in the conventional example shown in FIG.
2. It is attached together with the lead wire 14 through the liquid gasket 30 and connected to the arithmetic and control unit 10 by the lead wire 14, but the illustration is omitted and only the holder is shown.
The cylindrical portion 15a of the sensor holder 15 is provided with several (4 in the figure) notches 16.
【００３２】このような構成のセンサホルダ１５では、
切欠き１６によって１定時間内に音波がホルダ内で反射
する回数が多くなるために、これによって、センサホル
ダ１５内での反射波（ノイズ）の減衰が大きくなるの
で、信号が受信される時点でのノイズ音圧を低下させる
ことができる。In the sensor holder 15 having such a structure,
Since the notch 16 increases the number of times the sound wave is reflected in the holder within one fixed time, the attenuation of the reflected wave (noise) in the sensor holder 15 is increased, so that when the signal is received. The noise sound pressure in can be reduced.
【００３３】従って、超音波センサ７の受信波のＳＮ比
が大きくなり、信号の識別が容易になるので、超音波セ
ンサ７から発射された超音波の反射板９からの反射波が
超音波センサ７に戻るまでの所要時間が測定できなくな
るという不具合は改善される。Therefore, since the SN ratio of the received wave of the ultrasonic sensor 7 becomes large and the signal can be easily identified, the reflected wave of the ultrasonic wave emitted from the ultrasonic sensor 7 from the reflection plate 9 is detected by the ultrasonic sensor. The problem that the time required to return to 7 cannot be measured is improved.
【００３４】その他のセンサホルダ１５以外の構成は図
５乃至図１０に示す従来の装置と同じであり、その反射
信号を測定回路１１に取込んでからの作用も同様である
ので説明は省略する。要約すると本第１実施例はセンサ
ホルダ１５が従来のセンサホルダ７に代るものである。The rest of the structure other than the sensor holder 15 is the same as that of the conventional device shown in FIGS. 5 to 10, and the operation after the reflected signal is taken into the measuring circuit 11 is also the same, so the explanation is omitted. . In summary, in the first embodiment, the sensor holder 15 replaces the conventional sensor holder 7.
【００３５】図２は本発明の第２実施例に係る容器内の
潤滑油中の冷媒混入率、油量検出装置におけるセンサホ
ルダで、（ａ）は側面図、（ｂ）そのＢ−Ｂ断面図であ
る。図において、第１実施例と同様ホルダと、反射板以
外は省略して図示しており、このセンサホルダ１７の端
板外面（超音波発信面）には球面１８が形成されてい
る。FIG. 2 shows a sensor holder in a device for detecting the amount of refrigerant mixed in lubricating oil in a container according to the second embodiment of the present invention, and an oil amount detecting device, in which (a) is a side view and (b) its BB cross section. It is a figure. In the figure, like the first embodiment, the holder and the reflector are omitted for illustration, and a spherical surface 18 is formed on the outer surface (ultrasonic wave transmitting surface) of the end plate of the sensor holder 17.
【００３６】このセンサホルダ１７は図５に示される従
来のセンサホルダ７と同様密閉ケーシング２の底壁６を
貫通して、超音波発射方向を鉛直方向にして取付けられ
ている。従って、センサホルダ１７の端板外面に形成さ
れた球面１８は潤滑油Ｌに接触している。又、密閉ケー
シング２中に取付けられた反射板９は図２（ａ）に示す
ように上記球面１８の焦点距離Ｆ内に配置されている。Like the conventional sensor holder 7 shown in FIG. 5, the sensor holder 17 penetrates through the bottom wall 6 of the hermetically sealed casing 2 and is mounted with the ultrasonic wave emission direction being the vertical direction. Therefore, the spherical surface 18 formed on the outer surface of the end plate of the sensor holder 17 is in contact with the lubricating oil L. The reflector 9 mounted in the closed casing 2 is arranged within the focal length F of the spherical surface 18 as shown in FIG.
【００３７】このような構成によって、図２に示すよう
にセンサホルダ１７の端板上面に形成された球面１８か
ら潤滑油Ｌ中に透過した超音波（ビーム）４０の反射板
９からの反射波４１（信号）は、端板外面の中心部に集
束されるので、信号音圧を大きくすることができる。With such a configuration, as shown in FIG. 2, the reflected wave from the reflection plate 9 of the ultrasonic wave (beam) 40 transmitted through the lubricating oil L from the spherical surface 18 formed on the upper surface of the end plate of the sensor holder 17. Since 41 (signal) is focused on the central portion of the outer surface of the end plate, the signal sound pressure can be increased.
【００３８】又、上記のように信号が集束されるので、
図１１に示す例のように反射板９とセンサホルダ１７の
端板に傾きがある場合には、超音波センサ７に受信でき
ない反射板９からの反射波３６が存在したが、このよう
な反射波も減少するので、この点でも信号音圧が大きく
なる。Since the signals are focused as described above,
When the reflector 9 and the end plate of the sensor holder 17 are inclined as in the example shown in FIG. 11, there is a reflected wave 36 from the reflector 9 that cannot be received by the ultrasonic sensor 7. Since the wave is also reduced, the signal sound pressure is increased at this point as well.
【００３９】従って、超音波センサ７の受信波のＳＮ比
が大きくなり、信号の識別が容易になるので、超音波セ
ンサ７から発射された超音波の反射板９からの反射波が
超音波センサ７に戻るまでの所要時間が測定できなくな
るという不具合は改善される。Therefore, since the SN ratio of the received wave of the ultrasonic sensor 7 becomes large and the signal can be easily identified, the reflected wave of the ultrasonic wave emitted from the ultrasonic sensor 7 from the reflection plate 9 is detected by the ultrasonic sensor. The problem that the time required to return to 7 cannot be measured is improved.
【００４０】その他のセンサホルダ１７以外の構成は図
５乃至図１０に示す従来例と同じであり、その作用も同
様であるので説明は省略する。要約すると本第２実施例
はセンサホルダ１７が従来のセンサホルダ７に代わるも
のである。The structure other than the sensor holder 17 is the same as that of the conventional example shown in FIGS. 5 to 10, and the operation thereof is also the same, so the description thereof will be omitted. In summary, in the second embodiment, the sensor holder 17 replaces the conventional sensor holder 7.
【００４１】図３は本発明の第３実施例に係る容器内の
潤滑油中の冷媒混入率、油量検出装置におけるセンサホ
ルダで、（ａ）は側面図、（ｂ）はそのＣ−Ｃ断面図で
ある。図において、第２実施例と同様、ホルダと反射板
のみ図示し、その他の構成は省略して図示しており、こ
のセンサホルダ１９の端板外面（超音波発信面）には円
筒面２０が形成されている。FIG. 3 shows a sensor holder in a device for detecting the mixing ratio of refrigerant in lubricating oil in a container and an oil amount according to the third embodiment of the present invention, (a) is a side view, and (b) is its C-C. FIG. In the figure, like the second embodiment, only the holder and the reflecting plate are shown, and other configurations are omitted, and a cylindrical surface 20 is provided on the outer surface (ultrasonic wave transmitting surface) of the end plate of the sensor holder 19. Has been formed.
【００４２】このような構成によって潤滑油Ｌ中に発射
した超音波４２は反射板９から反射して反射波４３とな
り、端板外面の中心部に集束され、受信する信号音圧を
大きくすることができ、第２実施例と同様の作用、効果
が得られる。With this structure, the ultrasonic wave 42 emitted into the lubricating oil L is reflected by the reflector 9 to become a reflected wave 43, which is focused on the center of the outer surface of the end plate to increase the received signal sound pressure. Therefore, the same operation and effect as those of the second embodiment can be obtained.
【００４３】ただし、反射板９からの反射波４３（信
号）は第２実施例においては、センサホルダ１７端板外
面（超音波受信面）の中心点に集束されるのに対し、第
３実施例においては、中心点ではなくその円筒面の中心
線に集束されるので、その集束度合いは第２実施例より
は多少低下し、その効果も低下はするが、第２実施例の
球面よりは加工が容易となる利点がある。However, in the second embodiment, the reflected wave 43 (signal) from the reflecting plate 9 is focused on the center point of the outer surface (ultrasonic wave receiving surface) of the end plate of the sensor holder 17, whereas in the third embodiment. In the example, since the light is focused on the center line of the cylindrical surface instead of the center point, the degree of focusing is slightly lower than that of the second embodiment and its effect is lowered, but it is lower than that of the spherical surface of the second embodiment. There is an advantage that processing becomes easy.
【００４４】図４は本発明の第４実施例に係る容器内の
潤滑油中の冷媒混入率、油量検出装置におけるセンサホ
ルダで、（ａ）は側面図、（ｂ）はそのＤ−Ｄ断面図で
ある。図において、他の実施例と同様センサホルダと反
射板のみ図示し、他は省略しており、このセンサホルダ
２１の端板外面（超音波受発信面）にはＶ字状に交差す
る平面２２が形成されている。そして、反射板９はセン
サホルダ２１のＶ字平面２２の底部からの距離Ｌがｄ／
４ｔａｎθより短かくなる位置に配置されている。その
他の構成については他の実施例と同じである。FIG. 4 shows a sensor holder in a device for detecting the amount of refrigerant mixed in lubricating oil in a container according to a fourth embodiment of the present invention, and an oil amount detecting device, in which (a) is a side view and (b) is DD thereof. FIG. In the figure, like the other embodiments, only the sensor holder and the reflecting plate are shown and the others are omitted, and a flat surface 22 intersecting in a V shape is formed on the outer surface (ultrasonic wave transmitting / receiving surface) of the end plate of the sensor holder 21. Are formed. The distance L from the bottom of the V-shaped plane 22 of the sensor holder 21 is d /
It is arranged at a position shorter than 4 tan θ. Other configurations are the same as those of the other embodiments.
【００４５】このような構成によって、潤滑油Ｌ中に発
射された超音波４４は反射板９から反射して反射波４５
となり、端板外面の中心部に集束され、受信する信号音
圧を大きくすることができ、第２、第３と同様の作用、
効果が得られる。With such a structure, the ultrasonic wave 44 emitted in the lubricating oil L is reflected from the reflection plate 9 and reflected wave 45.
Therefore, the signal sound pressure that is focused on the outer surface of the end plate can be increased, and the received signal sound pressure can be increased.
The effect is obtained.
【００４６】ただし、反射波（信号）の集束度合いは第
３実施例同様第２実施例より多少低下し、その効果も低
下するが加工が容易となる利点がある。However, the degree of focusing of the reflected wave (signal) is slightly lower than that of the second embodiment as in the third embodiment, and the effect thereof is reduced, but there is an advantage that the processing is easy.
【００４７】以上、第１〜第４実施例について説明した
が、要約すると、第１実施例においては、「本発明が解
決しようとする課題」に記載の（１）項の問題点即ち、
超音波速度が速い時か、又は経路が短い場合にＳＮ比を
改善し、第２〜第４実施例においては、（２）項の問題
点、即ち、反射板９とセンサホルダとが平行に設置され
ていない場合には、効果的にその受信波を大きくして、
この問題点を改善できるものである。Although the first to fourth embodiments have been described above, in summary, in the first embodiment, the problem of item (1) described in "Problems to be solved by the present invention", that is,
When the ultrasonic velocity is high or the path is short, the SN ratio is improved. In the second to fourth examples, the problem of item (2), that is, the reflector 9 and the sensor holder are parallel to each other. If not installed, effectively increase the received wave,
This problem can be improved.
【００４８】従って、実用に当っては、第１実施例と第
２〜第４実施例のいずれかとを合体し、例えば、第１実
施例と第３実施例とを組合せて、円筒部に切欠きを設け
ると共に、端板外面に円筒加工を施したセンサホルダが
使用できる。Therefore, in practical use, the first embodiment and any one of the second to fourth embodiments are combined, and, for example, the first embodiment and the third embodiment are combined and cut into a cylindrical portion. It is possible to use a sensor holder that is provided with a notch and has a cylindrical surface on the outer surface of the end plate.
【００４９】又、上記センサホルダ１５，１７，１９，
２１を備えてなる潤滑油中の冷媒混入率、潤滑油液量検
出装置は冷媒、潤滑油を用いるあらゆる機械装置に適用
できるが、空調装置、冷凍装置等に使用される冷凍圧縮
機の圧縮機構摺動部への安定給油のために用いられるの
が主体であり、そのため、センサホルダを冷凍圧縮機、
空調装置、冷凍装置等に装着し、センサホルダ内の超音
波センサ７からリード線１４で演算制御装置１０に接続
して冷媒混入率、潤滑油液量が検出される。Further, the sensor holders 15, 17, 19 and
The refrigerant mixing ratio in the lubricating oil and the lubricating oil liquid amount detecting device provided with 21 can be applied to all mechanical devices using the refrigerant and the lubricating oil, but the compression mechanism of the refrigerating compressor used for the air conditioner, the refrigerating device, etc. It is mainly used for stable lubrication of the sliding parts.
It is attached to an air conditioner, a refrigerating device, etc., and the ultrasonic sensor 7 in the sensor holder is connected to the arithmetic and control unit 10 by a lead wire 14 to detect the refrigerant mixing ratio and the lubricating oil liquid amount.
【００５０】[0050]
【発明の効果】以上、具体的に説明したように、本発明
においては、超音波センサを取付けたセンサホルダを有
する容器内の潤滑油中の冷媒混入率、油量検出装置にお
いて、（１）センサホルダの円筒部に切欠きを設ける、
（２）センサホルダの端板外面を球面とする、（３）同
端板外面を円筒形とする、（４）同端板外面をＶ字平面
とする構成とし、更に、（５）これらのセンサホルダを
冷凍装置の潤滑油を貯溜する容器に取付ける、それぞれ
の構成としたので次のような効果を奏するものである。As described above in detail, according to the present invention, the refrigerant mixing ratio in the lubricating oil in the container having the sensor holder to which the ultrasonic sensor is attached, and the oil amount detecting device include (1) Provide a notch in the cylindrical part of the sensor holder,
(2) The outer surface of the end plate of the sensor holder is spherical, (3) the outer surface of the end plate is cylindrical, (4) the outer surface of the end plate is V-shaped, and (5) Since the sensor holder is attached to the container for storing the lubricating oil of the refrigerating device, the following effects can be obtained.
【００５１】（１）センサホルダの円筒部に切欠きが設
けられているので、一定時間内のセンサホルダ内での超
音波の反射回数が増加し、センサホルダ内反射波（ノイ
ズ）の減衰が大きくなる。従って、超音波センサに信号
が受信される時点でのノイズ音圧が低下するので、受信
波のＳＮ比が大きくなり信号の識別が容易になる。(1) Since the notch is provided in the cylindrical portion of the sensor holder, the number of reflections of ultrasonic waves in the sensor holder within a fixed time increases, and the reflected wave (noise) in the sensor holder is attenuated. growing. Therefore, the noise sound pressure at the time when the signal is received by the ultrasonic sensor is lowered, so that the SN ratio of the received wave is increased and the signal can be easily identified.
【００５２】（２）センサホルダの端板外面の球面に反
射板からの反射波（信号）がセンサホルダ端板上面の中
心部に集束する。従って、超音波センサに受信される信
号音圧が大きくなる。また、上記のように信号が集束さ
れるので、反射板とセンサホルダの端板に傾きがある場
合、超音波センサに受信できない反射板からの反射波が
減少するのでこの点でも信号音圧が大きくなる。そのた
め、超音波センサの受信波のＳＮ比が大きくなり信号の
識別が容易になる。(2) The reflected wave (signal) from the reflector is focused on the spherical surface of the outer surface of the end plate of the sensor holder at the center of the upper surface of the end plate of the sensor holder. Therefore, the signal sound pressure received by the ultrasonic sensor increases. Further, since the signals are focused as described above, when there is an inclination between the reflector and the end plate of the sensor holder, the reflected wave from the reflector that cannot be received by the ultrasonic sensor is reduced, so that the signal sound pressure is also reduced in this point. growing. Therefore, the SN ratio of the received wave of the ultrasonic sensor is increased, and the signal can be easily identified.
【００５３】（３）センサホルダの端板外面に円筒加工
が施されているので前述の（２）と同様に信号音圧が大
きくなり、ＳＮ比が改善されて信号の識別が大きくな
り、更に、その加工が容易となる。(3) Since the outer surface of the end plate of the sensor holder is cylindrically processed, the signal sound pressure is increased, the SN ratio is improved, and the signal identification is increased as in the case of (2) described above. , Its processing becomes easy.
【００５４】（４）センサホルダ端板外面にＶ字平面が
形成されているので、前述の（３）と同様に信号音圧が
大きくなり、ＳＮ比が改善されて信号の識別が大きくな
り、更に、その加工も容易となる。このような（１）〜
（４）の効果により、従来のように超音波センサから発
射された超音波の反射板からの反射波が超音波センサに
戻るまでの所要時間の測定ができなくなり、潤滑油中の
冷媒混入率や油量の検出ができなくなるという不具合が
改善される。(4) Since the V-shaped flat surface is formed on the outer surface of the end plate of the sensor holder, the signal sound pressure is increased, the SN ratio is improved and the signal discrimination is increased as in the case of the above (3). Further, its processing becomes easy. Such (1) ~
Due to the effect of (4), it becomes impossible to measure the time required for the reflected wave of the ultrasonic wave emitted from the ultrasonic wave sensor to return to the ultrasonic wave sensor as in the conventional case, and thus the refrigerant mixing ratio in the lubricating oil becomes impossible. The problem that the oil quantity cannot be detected is improved.
【００５５】（５）空気調和機、冷凍機等の冷凍装置の
運転中において、冷凍圧縮機の油溜め内の潤滑油中の冷
媒混入率及び潤滑油の液量が検出されるので冷媒混入率
が異常に高くなったときや液量が異常に低下したときに
は冷凍圧縮機の運転を停止することができるので、冷凍
圧縮機焼付きなどの事故を未然に防止することができ
る。(5) When the refrigerating device such as the air conditioner or the refrigerator is in operation, the refrigerant mixing ratio in the lubricating oil and the liquid amount of the lubricating oil in the oil sump of the refrigerating compressor are detected. Since the operation of the refrigerating compressor can be stopped when the temperature becomes abnormally high or the liquid amount decreases abnormally, accidents such as seizure of the refrigerating compressor can be prevented.
【図１】本発明の第一実施例に係る容器内の潤滑油中の
冷媒混入率、油量検出装置におけるセンサホルダで、
（ａ）は側面図、（ｂ）はそのＡ−Ａ矢視図である。FIG. 1 is a sensor holder in a device for detecting an amount of refrigerant mixed in lubricating oil in a container according to a first embodiment of the present invention, and an oil amount detecting device;
(A) is a side view and (b) is the AA arrow line view.
【図２】本発明の第２実施例に係る容器内の潤滑油中の
冷媒混入率、油量検出装置におけるセンサホルダで、
（ａ）は側面図、（ｂ）はそのＢ−Ｂ断面図である。FIG. 2 is a sensor holder in a device for detecting a refrigerant mixture ratio in a lubricating oil in a container according to a second embodiment of the present invention, and an oil amount detecting device;
(A) is a side view, (b) is the BB sectional drawing.
【図３】本発明の第３実施例に係る容器内の潤滑油中の
冷媒混入率、油量検出装置におけるセンサホルダで、
（ａ）は側面図、（ｂ）はそのＣ−Ｃ断面図である。FIG. 3 is a sensor holder in a device for detecting the amount of refrigerant mixed in the lubricating oil in the container according to the third embodiment of the present invention,
(A) is a side view and (b) is the CC sectional view.
【図４】本発明の第４実施例に係る容器内の潤滑油中の
冷媒混入率、油量検出装置におけるセンサホルダで、
（ａ）は側面図、（ｂ）はそのＤ−Ｄ断面図である。FIG. 4 is a sensor holder in a device for detecting an amount of refrigerant mixed in lubricating oil in a container according to a fourth embodiment of the present invention,
(A) is a side view and (b) is the DD sectional view.
【図５】従来の冷媒混入率、油量検出装置の構成図であ
る。FIG. 5 is a configuration diagram of a conventional refrigerant mixing ratio and oil amount detection device.
【図６】従来のセンサホルダの断面図である。FIG. 6 is a cross-sectional view of a conventional sensor holder.
【図７】潤滑油中の冷媒混入率と音波との関係を示す特
性図である。FIG. 7 is a characteristic diagram showing a relationship between a mixing ratio of a refrigerant in lubricating oil and a sound wave.
【図８】潤滑油中とセンサホルダにおける超音波伝播モ
デル図である。FIG. 8 is an ultrasonic propagation model diagram in lubricating oil and in a sensor holder.
【図９】センサホルダ内からの反射波を示す一般的な説
明図である。FIG. 9 is a general explanatory view showing a reflected wave from the inside of a sensor holder.
【図１０】超音波センサの受信波形図である。FIG. 10 is a reception waveform diagram of the ultrasonic sensor.
【図１１】容器内の反射板が傾斜した時の超音波反射波
の状況説明図である。FIG. 11 is an explanatory diagram of a state of ultrasonic reflected waves when a reflector in a container is inclined.
２ 密閉ケーシング ３ 油溜め ７ 超音波センサ ８ センサホルダ ９ 反射板 １０ 演算制御装置 １５ センサホルダ １６ 切欠き １７ センサホルダ １８ 球面 １９ センサホルダ ２０ 円筒面 ２１ センサホルダ ２２ Ｖ字平面 2 Airtight casing 3 Oil sump 7 Ultrasonic sensor 8 Sensor holder 9 Reflector 10 Arithmetic control device 15 Sensor holder 16 Notch 17 Sensor holder 18 Spherical 19 Sensor holder 20 Cylindrical surface 21 Sensor holder 22 V-shaped plane
───────────────────────────────────────────────────── フロントページの続き (72)発明者 松村 憲明 名古屋市中村区岩塚町字高道１番地 三菱 重工業株式会社名古屋研究所内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Noriaki Matsumura No. 1 Takamichi, Iwazuka-cho, Nakamura-ku, Nagoya City Mitsubishi Heavy Industries, Ltd. Nagoya Research Institute
Claims (5)
側に突設した円筒状センサホルダと、この円筒状センサ
ホルダの端板内面に取付けられた超音波センサと、前記
潤滑油内で前記円筒状センサホルダの端板外面の上方に
前記超音波センサからの超音波発射方向とほぼ垂直に前
記容器内に配置された反射板と、超音波の反射時間を測
定する測定回路とを備えてなり、前記潤滑油中の冷媒混
入率及び潤滑油の液量を検出する冷媒混入率、油量検出
装置において、前記円筒状センサホルダの円筒部に切欠
きを設けたことを特徴とする容器内の潤滑油中の冷媒混
入率、油量検出装置。1. A cylindrical sensor holder penetrating a wall of a container for storing lubricating oil and protruding outward, an ultrasonic sensor attached to an inner surface of an end plate of the cylindrical sensor holder, and the inside of the lubricating oil. A reflection plate disposed in the container above the outer surface of the end plate of the cylindrical sensor holder substantially perpendicular to the ultrasonic wave emission direction from the ultrasonic sensor, and a measurement circuit for measuring the reflection time of the ultrasonic wave. In the device for detecting the mixing ratio of the refrigerant in the lubricating oil and the mixing ratio of the refrigerant for detecting the liquid amount of the lubricating oil, and the oil amount detecting device, the cylindrical portion of the cylindrical sensor holder is provided with a notch. Refrigerant mixing ratio in lubricating oil in container, oil amount detection device.
側に突設した円筒状センサホルダと、この円筒状センサ
ホルダの端板内面に取付けられた超音波センサと、前記
潤滑油内で前記円筒状センサホルダの端板外面の上方に
前記超音波センサからの超音波発射方向とほぼ垂直に前
記容器内に配置された反射板と、超音波の反射時間を測
定する測定回路とを備えてなり、前記潤滑油中の冷媒混
入率及び潤滑油の液量を検出する冷媒混入率、油量検出
装置において、前記円筒状センサホルダの超音波発信面
となる前記端板外面に球面加工を施し、同球面を前記潤
滑油に接触せしめると共に、前記反射板を前記球面の焦
点距離内に配置したことを特徴とする容器内の潤滑油中
の冷媒混入率、油量検出装置。2. A cylindrical sensor holder penetrating a wall of a container for storing lubricating oil and projecting outward, an ultrasonic sensor attached to an inner surface of an end plate of the cylindrical sensor holder, and the inside of the lubricating oil. A reflection plate disposed in the container above the outer surface of the end plate of the cylindrical sensor holder substantially perpendicular to the ultrasonic wave emission direction from the ultrasonic sensor, and a measurement circuit for measuring the reflection time of the ultrasonic wave. In the device for detecting the mixing ratio of the refrigerant in the lubricating oil and the mixing ratio of the refrigerant for detecting the liquid amount of the lubricating oil, and the oil amount detecting device, spherical processing is performed on the outer surface of the end plate which is the ultrasonic wave transmitting surface of the cylindrical sensor holder. The contact surface of the same spherical surface is brought into contact with the lubricating oil, and the reflection plate is arranged within the focal length of the spherical surface.
側に突設した円筒状センサホルダと、この円筒状センサ
ホルダの端板内面に取付けられた超音波センサと、前記
潤滑油内で前記円筒状センサホルダの端板外面の上方に
前記超音波センサからの超音波発射方向とほぼ垂直に前
記容器内に配置された反射板と、超音波の反射時間を測
定する測定回路とを備えてなり、前記潤滑油中の冷媒混
入率及び潤滑油の液量を検出する冷媒混入率、油量検出
装置において、前記円筒状センサホルダの超音波発信面
となる前記端板外面に円筒面加工を施し、同円筒面を前
記潤滑油に接触せしめると共に、前記反射板を前記円筒
面の焦点距離内に配置したことを特徴とする容器内の潤
滑油中の冷媒混入率、油量検出装置。3. A cylindrical sensor holder that penetrates through a wall of a container for storing lubricating oil and projects outward, an ultrasonic sensor attached to an inner surface of an end plate of the cylindrical sensor holder, and the inside of the lubricating oil. A reflection plate disposed in the container above the outer surface of the end plate of the cylindrical sensor holder substantially perpendicular to the ultrasonic wave emission direction from the ultrasonic sensor, and a measurement circuit for measuring the reflection time of the ultrasonic wave. In the device for detecting the mixing ratio of the refrigerant in the lubricating oil and the mixing ratio of the lubricating oil for detecting the liquid amount of the lubricating oil, and the oil amount detecting device, a cylindrical surface is provided on the outer surface of the end plate which is an ultrasonic wave transmitting surface of the cylindrical sensor holder. A processing device is provided to bring the cylindrical surface into contact with the lubricating oil, and the reflection plate is arranged within the focal length of the cylindrical surface. A refrigerant mixing ratio in the lubricating oil in the container, an oil amount detection device. .
側に突設した円筒状センサホルダと、この円筒状センサ
ホルダの端板内面に取付けられた超音波センサと、前記
潤滑油内で前記円筒状センサホルダの端板外面の上方に
前記超音波センサからの超音波発射方向とほぼ垂直に前
記容器内に配置された反射板と、超音波の反射時間を測
定する測定回路とを備えてなり、前記潤滑油中の冷媒混
入率及び潤滑油の液量を検出する冷媒混入率、油量検出
装置において、前記円筒状センサホルダの超音波発信面
となる前記端板外面にＶ字平面加工を施し、同Ｖ字平面
を前記潤滑油に接触せしめると共に、前記反射板の前記
Ｖ字平面底部からの距離を、前記円筒状センサホルダの
円筒外径をｄ、同Ｖ字面の平面となす角度をθとしてｄ
／４ｔａｎθ以内に配置したことを特徴とする容器内の
潤滑油中の冷媒混入率、油量検出装置。4. A cylindrical sensor holder penetrating a wall of a container for storing lubricating oil and protruding outward, an ultrasonic sensor attached to an inner surface of an end plate of the cylindrical sensor holder, and the inside of the lubricating oil. A reflection plate disposed in the container above the outer surface of the end plate of the cylindrical sensor holder substantially perpendicular to the ultrasonic wave emission direction from the ultrasonic sensor, and a measurement circuit for measuring the reflection time of the ultrasonic wave. In the device for detecting the mixing ratio of refrigerant in the lubricating oil and the mixing ratio of the refrigerant for detecting the liquid amount of the lubricating oil, and the oil amount detecting device, a V-shaped outer surface of the end plate serving as the ultrasonic wave transmitting surface of the cylindrical sensor holder is provided. A flat surface is processed to bring the same V-shaped surface into contact with the lubricating oil, and the distance from the bottom surface of the V-shaped flat surface of the reflection plate is defined as the cylindrical outer diameter of the cylindrical sensor holder d and the flat surface of the same V-shaped surface. The angle is θ
A device for detecting the amount of refrigerant mixed in a lubricating oil in a container, and an oil amount detecting device, which is arranged within / 4 tan θ.
空気調和機、冷凍機等の冷凍装置の潤滑油を貯溜する容
器に具備したことを特徴とする請求項１，２，３又は４
のいずれかに記載の容器内の潤滑油中の冷媒混入率、油
量検出装置。5. The cylindrical sensor holder is a refrigeration compressor,
A container for storing lubricating oil of a refrigerating device such as an air conditioner or a refrigerator is provided, and the container is provided with the lubricating oil.
A refrigerant mixing ratio in the lubricating oil in the container, and an oil amount detection device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14445994A JP3238281B2 (en) | 1994-06-27 | 1994-06-27 | Detector of refrigerant mixing rate and oil amount in lubricating oil in container |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14445994A JP3238281B2 (en) | 1994-06-27 | 1994-06-27 | Detector of refrigerant mixing rate and oil amount in lubricating oil in container |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0815239A true JPH0815239A (en) | 1996-01-19 |
| JP3238281B2 JP3238281B2 (en) | 2001-12-10 |
Family
ID=15362758
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14445994A Expired - Fee Related JP3238281B2 (en) | 1994-06-27 | 1994-06-27 | Detector of refrigerant mixing rate and oil amount in lubricating oil in container |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3238281B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011038975A (en) * | 2009-08-17 | 2011-02-24 | Ryoden Shonan Electronics Kk | Ultrasonic liquid-detection device |
| CN107389117A (en) * | 2017-08-25 | 2017-11-24 | 苏州易德龙科技股份有限公司 | A kind of test device and method of high frequency low voltage ultrasonic sensor |
| WO2022199176A1 (en) * | 2021-03-24 | 2022-09-29 | 中国核电工程有限公司 | Lubrication monitoring method and system for important rotating device of nuclear island, and nuclear island system |
-
1994
- 1994-06-27 JP JP14445994A patent/JP3238281B2/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011038975A (en) * | 2009-08-17 | 2011-02-24 | Ryoden Shonan Electronics Kk | Ultrasonic liquid-detection device |
| CN107389117A (en) * | 2017-08-25 | 2017-11-24 | 苏州易德龙科技股份有限公司 | A kind of test device and method of high frequency low voltage ultrasonic sensor |
| CN107389117B (en) * | 2017-08-25 | 2024-02-23 | 苏州易德龙科技股份有限公司 | Testing device and method for high-frequency low-voltage ultrasonic sensor |
| WO2022199176A1 (en) * | 2021-03-24 | 2022-09-29 | 中国核电工程有限公司 | Lubrication monitoring method and system for important rotating device of nuclear island, and nuclear island system |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3238281B2 (en) | 2001-12-10 |
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