JPS63222217A - Rotation detector in compressor - Google Patents
Rotation detector in compressorInfo
- Publication number
- JPS63222217A JPS63222217A JP62057763A JP5776387A JPS63222217A JP S63222217 A JPS63222217 A JP S63222217A JP 62057763 A JP62057763 A JP 62057763A JP 5776387 A JP5776387 A JP 5776387A JP S63222217 A JPS63222217 A JP S63222217A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic sensor
- compressor
- magnetic
- magnet
- magnets
- 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.)
- Granted
Links
- 230000004907 flux Effects 0.000 claims abstract description 12
- 230000000694 effects Effects 0.000 claims abstract description 7
- 239000000696 magnetic material Substances 0.000 claims abstract description 6
- 238000001514 detection method Methods 0.000 claims description 7
- 229910000808 amorphous metal alloy Inorganic materials 0.000 claims 1
- 238000004804 winding Methods 0.000 abstract 2
- 238000000034 method Methods 0.000 abstract 1
- 238000011896 sensitive detection Methods 0.000 abstract 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910000859 α-Fe Inorganic materials 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 1
- BGPVFRJUHWVFKM-UHFFFAOYSA-N N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] Chemical compound N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] BGPVFRJUHWVFKM-UHFFFAOYSA-N 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 229910000833 kovar Inorganic materials 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 230000004043 responsiveness Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
- G01P3/42—Devices characterised by the use of electric or magnetic means
- G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
- G01P3/48—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage
- G01P3/481—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals
- G01P3/4815—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals using a pulse wire sensor, e.g. Wiegand wire
Abstract
Description
【発明の詳細な説明】
発明の目的
（産業上の利用分野）
本発明は、斜板式圧縮機、ベーン圧縮機等の圧縮機の回
転数を検出する回転検出装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION Object of the Invention (Field of Industrial Application) The present invention relates to a rotation detection device for detecting the rotation speed of a compressor such as a swash plate compressor or a vane compressor.
（従来の技術）
従来、圧縮機の回転数を検知するための回転検出装置と
しては、圧縮機に取着された磁石の回転面内でかつ磁石
に極力接近してケーシングに設けられたものがあった。(Prior Art) Conventionally, a rotation detection device for detecting the rotation speed of a compressor has been installed in a casing within the rotating plane of a magnet attached to the compressor and as close to the magnet as possible. there were.
例えば、第７図に示すように斜板式圧縮機において、斜
板４の外周部には２つの磁石３２Ａ及び３２Ｂが取着さ
れ、磁石３２Ａの回転面Ｐに位置するケーシング３１の
外表面には磁気センサー３３Ａが取着され、磁石３２Ｂ
の回転面Ｑに位置するケーシング３１の外表面には磁気
センサー３３Ｂが取着されている。For example, as shown in FIG. 7, in a swash plate compressor, two magnets 32A and 32B are attached to the outer periphery of the swash plate 4, and the outer surface of the casing 31 located on the rotating surface P of the magnet 32A is The magnetic sensor 33A is attached, and the magnet 32B
A magnetic sensor 33B is attached to the outer surface of the casing 31 located on the rotational surface Q of the casing 31.
そして、磁気センサー３３Ａにおいては第８図に示すよ
うに、回転角９０度で磁石３２Ａに基づく検出電圧の大
きな変化（電圧パルスＥ）があり、回転角２７０度で磁
石３２Ｂに基づく検出電圧の小さな変化（電圧パルスＦ
）があり、磁気センサー３３Ｂにおいては第９図に示す
ように、回転角９０度で磁石３２Ａに基づく検出電圧の
小さな変化（電圧パルスＧ）があり、回転角２７０度で
磁石３２Ｂに基づ（検出電圧の大きな変化（電圧パルス
Ｈ）がある。In the magnetic sensor 33A, as shown in FIG. 8, there is a large change (voltage pulse E) in the detected voltage based on the magnet 32A at a rotation angle of 90 degrees, and a small change in the detection voltage based on the magnet 32B at a rotation angle of 270 degrees. Change (voltage pulse F
), and in the magnetic sensor 33B, as shown in FIG. 9, there is a small change (voltage pulse G) in the detected voltage based on the magnet 32A at a rotation angle of 90 degrees, and ( There is a large change in the detected voltage (voltage pulse H).
（発明が解決しようとする問題点）
上記従来技術においては、磁気センサー３３Ａで磁石３
２Ｂに基づく磁束密度の変化を検出しようとしても出力
レベルが低いので、複数の磁気センサーが必要であった
。また、一回転中に複数の出力を得るためにも複数の磁
気センサーが必要であった。さらに、上記のように大き
な磁束の変化を得るために磁気センサー３３Ａ、３３Ｂ
は磁石３２Ａ、３２Ｂの回転面Ｐ、 Ｑ内に配置しなけ
ればならなかった。(Problems to be Solved by the Invention) In the above conventional technology, the magnetic sensor 33A
Even when trying to detect changes in magnetic flux density based on 2B, the output level is low, so multiple magnetic sensors are required. Additionally, multiple magnetic sensors were required to obtain multiple outputs during one rotation. Furthermore, in order to obtain a large change in magnetic flux as described above, the magnetic sensors 33A and 33B
had to be placed within the rotation planes P and Q of the magnets 32A and 32B.
さらに、磁石３２．Ａ、３２Ｂと磁気センサー３３Ａ、
３３Ｂとの距離は磁石３２Ａ、３２Ｂの大きさと磁力の
強さの上限のため制限があり、例えば前記従来技術の例
では２０ｍｍ以下としなければならなかった。Furthermore, magnet 32. A, 32B and magnetic sensor 33A,
The distance from the magnet 33B is limited due to the size of the magnets 32A and 32B and the upper limit of the strength of the magnetic force, and for example, in the example of the prior art described above, it had to be 20 mm or less.
発明の構成
（問題点を解決するための手段）
本発明は上記問題点を解決するために、圧縮機のケーシ
ングの内部に回転可能に設けられた回転子に取着された
磁石と、ケーシングに設けられ前記磁石によって磁化さ
れる磁性材よりなるボルトと、同ボルト又はその近傍に
設けられ前記ボルトからの磁束を検知するウィガンド効
果を利用したパルス型の磁気センサーとを備えるという
構成を１采用している。Structure of the Invention (Means for Solving the Problems) In order to solve the above problems, the present invention includes a magnet attached to a rotor rotatably provided inside a casing of a compressor, and a magnet attached to a rotor rotatably provided inside a casing of a compressor. A configuration including a bolt made of a magnetic material that is provided and magnetized by the magnet, and a pulse type magnetic sensor that is provided at or near the bolt and uses the Wigand effect to detect magnetic flux from the bolt is used. ing.
（作用）
上記構成を採用したことにより、磁気センサーは回転子
に取着された磁石の回転面内にある必要がな（、ボルト
の近傍にあればより、磁石の回転面から離れたケーシン
グの外表面にあってもよ（、しかも１個の磁気センサー
で複数個の磁石からの磁束の検出を同一の高い出力レベ
ルで行うことができる。(Function) By adopting the above configuration, the magnetic sensor does not need to be located within the rotating plane of the magnet attached to the rotor (it is better to locate it near the bolt, rather than in the casing away from the rotating plane of the magnet). Moreover, one magnetic sensor can detect magnetic flux from multiple magnets at the same high output level.
（実施例）
以下に本発明を具体化した一実施例を第１〜５図を用い
て説明する。(Example) An example embodying the present invention will be described below with reference to FIGS. 1 to 5.
斜板式圧縮機は第１図に示すように構成されている。即
ち、まず対接された１対のシリンダブロックＩＡ、ＩＢ
にはその中心部に貫通延在する駆動軸２が設けられてい
る。シリンダブロックＩＡ。The swash plate compressor is constructed as shown in FIG. That is, first, a pair of cylinder blocks IA and IB that are in contact with each other
is provided with a drive shaft 2 extending through its center. Cylinder block IA.
ＩＢと駆動軸２のとの間にはシリンダボア３ （本実施
例では５個）が軸方向に穿設されている。上記駆動軸２
に傾斜して斜板４が固着され、同斜板４の外周面には２
個の磁石５Ａ、５Ｂが埋め込まれている。そして、磁石
５Ａは回転して回転面Ｒを形成し、同じく磁石５Ｂは回
転して回転面Ｓを形成する。また、上記斜板４にはボー
ル６及びシュー７を介してピストン８が軸方向に摺動可
能に係留されている。同回転面ＲとＳの間の距離は２５
ｍｍである。Cylinder bores 3 (five in this embodiment) are bored in the axial direction between the IB and the drive shaft 2. Above drive shaft 2
A swash plate 4 is fixed to the swash plate 4 so as to be inclined to
magnets 5A and 5B are embedded. Then, the magnet 5A rotates to form a rotating surface R, and the magnet 5B similarly rotates to form a rotating surface S. Further, a piston 8 is moored to the swash plate 4 via a ball 6 and a shoe 7 so as to be slidable in the axial direction. The distance between the same rotation surfaces R and S is 25
It is mm.
前記シリンダブロックＬＡ、ＩＢの端面ばフロントハウ
ジング９及びリヤハウジング１ｏによって密閉され、こ
れらは適数本（本実施例では５本）のポル）１１によっ
て組立てられている。同ボルト１１は鉄（３０Ｍ４３５
）製であるが、低炭素の軟鋼はどよい。そして、フロン
トハウジング９の底面には磁気センサー１４が軸方向に
取着されている。なお、上記フロントハウジング９及び
リヤハウジングｌＯにはそれぞれ吸入室１２及び吐出室
１３が形成されている。The end faces of the cylinder blocks LA and IB are sealed by the front housing 9 and the rear housing 1o, which are assembled by an appropriate number (five in this embodiment) of poles 11. The bolt 11 is iron (30M435
), but low carbon mild steel is better. A magnetic sensor 14 is attached to the bottom surface of the front housing 9 in the axial direction. Note that a suction chamber 12 and a discharge chamber 13 are formed in the front housing 9 and the rear housing 10, respectively.
次に上記磁気センサー１４について説明する。Next, the magnetic sensor 14 will be explained.
本実施例で用いる磁気センサー１４は第３図に示すよう
に、芯体としての非磁性材料１５の外周にアモルファス
ワイヤ１６が螺旋状に巻回され、さらにその外周部にコ
イル１７が巻装されたものである。そして、同コイル１
７は外部制御装置と連結されている。上記アモルファス
ワイヤ１６はＦｅ−５ｔ−Ｂ系のもので、巻回の回数は
１ｍ当たり３０〜１００回程度である。As shown in FIG. 3, the magnetic sensor 14 used in this embodiment has an amorphous wire 16 spirally wound around the outer periphery of a non-magnetic material 15 as a core, and a coil 17 further wound around the outer periphery of the amorphous wire 16. It is something that And the same coil 1
7 is connected to an external control device. The amorphous wire 16 is made of Fe-5t-B and is wound approximately 30 to 100 times per meter.
次に、上記のように構成された実施例について作用及び
効果を説明する。Next, the functions and effects of the embodiment configured as described above will be explained.
図示しない動力源と連結された駆動軸２が回転すると、
それに固着された斜板４が回転し、それと同時に磁石５
Ａ、５Ｂが円の軌跡を描いてそれぞれ回転面Ｒ及びＳを
回転する。また、斜板４が回転すると、ピストン８がシ
リンダボア３内を往復動して冷媒の吸入、圧縮、吐出が
行われる。When the drive shaft 2 connected to a power source (not shown) rotates,
The swash plate 4 fixed to it rotates, and at the same time the magnet 5
A and 5B rotate on the rotation surfaces R and S, respectively, drawing circular trajectories. Furthermore, when the swash plate 4 rotates, the piston 8 reciprocates within the cylinder bore 3 to suck in, compress, and discharge refrigerant.
そこで、磁石５Ａ、５Ｂが回転すると、それによって発
生する磁束はボルト１１を通り、これを磁化する。そし
て、同ポル）１１から発生する磁束を磁気センサー１４
が検知する。即ち、磁石５Ａ、５Ｂがボルト１１に対面
したとき磁束密度が変化し、それと同時に磁気センサー
１４における６５１束密度も変化し磁気センサー１４の
コイル１７にレンツの法則に基づく起電力が発生する。Therefore, when the magnets 5A and 5B rotate, the magnetic flux generated thereby passes through the bolt 11 and magnetizes it. Then, the magnetic flux generated from the same pole) 11 is transferred to the magnetic sensor 14.
is detected. That is, when the magnets 5A and 5B face the bolt 11, the magnetic flux density changes, and at the same time, the 651 flux density in the magnetic sensor 14 also changes, and an electromotive force based on Lenz's law is generated in the coil 17 of the magnetic sensor 14.
このようにして得られる電圧を増幅器で増幅した後、オ
シログラフ等で観察すると第２図に示すように斜板４の
回転角が９０度の位置で磁石５Ａに基づく鋭い電圧パル
ス（正負１個づつ）Ａが発生し、同２７０度の位置で磁
石５Ｂに基づく同様の鋭い電圧パルス（正負１個づつ）
Ｂが発生する。After amplifying the voltage obtained in this way with an amplifier, and observing it with an oscilloscope or the like, we see that a sharp voltage pulse (one positive and one negative A) is generated, and similar sharp voltage pulses (one positive and one negative) based on magnet 5B are generated at the same 270 degree position.
B occurs.
本実施例で用いる磁気センサー１４は、このように磁束
の変化速度とは関係なく尖頭値レベルが一定でしかもパ
ルス幅の小さなパルス電圧（ウィガンドパルス）を発生
し、ウィガンド効果を有するものである。また、磁気セ
ンサー１４は感度がよく出力が安定しているので、磁石
５Ａ、５Ｂから遠く離れた弱磁場にも十分反応し、磁石
５Ａ。The magnetic sensor 14 used in this embodiment generates a pulse voltage (Wigand pulse) with a constant peak value level and a small pulse width regardless of the rate of change of magnetic flux, and has the Wigand effect. be. Moreover, since the magnetic sensor 14 has good sensitivity and stable output, it responds sufficiently to weak magnetic fields far away from the magnets 5A and 5B, and the magnet 5A.
５Ｂの高速回転時にも高い応答性を示し、その上磁気ノ
イズに対して反応しにくい。5B exhibits high responsiveness even during high-speed rotation, and is less likely to react to magnetic noise.
そして、磁石５Ａ、５Ｂ（フェライト磁石で４０００ガ
ウスの場合）の回転面からの距離に対する出力は第５図
の矩形波Ｃに示すように同距離が±３ ｃｍ以内の範囲
では一定の４００ｍＶである。The output of magnets 5A and 5B (in the case of 4000 gauss ferrite magnets) relative to the distance from the rotating surface is a constant 400 mV when the same distance is within ±3 cm, as shown in rectangular wave C in Figure 5. .
なお、従来の磁気センサーを使用した場合には、同図の
曲線（破線）Ｕに示すように磁石５Ａ。Note that when a conventional magnetic sensor is used, the magnet 5A is as shown by the curve (broken line) U in the figure.
５Ｂの回転面近傍のみに小さな出力が現れるにすぎない
。A small output appears only near the rotating surface of 5B.
上記のように本実施例によれば、斜板式圧縮機の構成部
品であるボルトを利用したことにより磁気センサー１４
が１個で２個の磁石５Ａ、５Ｂの磁束変化を検知でき、
同磁気センサー１４の取付位置はポル１−１１の近傍で
あればシリンダブロックＩＡ、ＩＢの外表面のいずれの
位置でもよい。As described above, according to this embodiment, the magnetic sensor 14 is
can detect changes in the magnetic flux of two magnets 5A and 5B with one
The magnetic sensor 14 may be mounted at any position on the outer surface of the cylinder block IA or IB as long as it is near the port 1-11.
従って、設計上の自由度が大きく、コストダウンをはか
ることが可能である。Therefore, there is a large degree of freedom in design, and it is possible to reduce costs.
本発明は上記実施例に限定されるものではなく、次のよ
うに構成することもできる。The present invention is not limited to the above embodiments, but can also be configured as follows.
（１）上記実施例では磁気センサー１４は、シリンダブ
ロックＩへの下面に設けたが、これをシリンダブロック
ＩＢの下面又はシリンダブロックＩＡ、ｌＢの側面に設
けることもできる。この場合にも前記第２図に示すパル
ス曲線と同様のパルス曲線が得られる。(1) In the above embodiment, the magnetic sensor 14 is provided on the lower surface of the cylinder block I, but it can also be provided on the lower surface of the cylinder block IB or the side surfaces of the cylinder blocks IA, IB. In this case as well, a pulse curve similar to the pulse curve shown in FIG. 2 can be obtained.
また、磁気センサー１４はポルト１１自体に埋め込むこ
とも可能である。Moreover, the magnetic sensor 14 can also be embedded in the port 11 itself.
（２）磁気センサー１４として、第４図に示すようにＦ
ｅ −Ｃｏ系高磁歪材料１８のまわりにこれより膨張係
数の小さい金属１９例えばコバール合金等を熱間でクラ
ッド圧、接し、冷却時の収縮率の差を利用して高磁歪材
料側に引張応力をかけたものをコアとし、必要に応じて
棒状磁石２０を並列配置したものにコイル１７を巻回し
たものも使用される。(2) As the magnetic sensor 14, as shown in FIG.
e - Co-based high magnetostrictive material 18 is surrounded by a metal 19 with a smaller expansion coefficient, such as Kovar alloy, under hot clad pressure, and tensile stress is applied to the high magnetostrictive material side by utilizing the difference in shrinkage rate during cooling. A coil 17 may be wound around a core in which rod-shaped magnets 20 are arranged in parallel as needed.
（３）磁石５Ａ、５Ｂは前記実施例ではフェライト磁石
を用いたが、これに代えて希土類磁石（磁力１００００
ガウス）を使用することができる。(3) Although ferrite magnets were used as the magnets 5A and 5B in the above embodiment, rare earth magnets (with a magnetic force of 10,000
Gauss) can be used.
その場合、第６図の矩形波りに示すように磁石回転面か
らの距離が±８（３以内の範囲では一定の４００ｍＶで
ある。なお、従来の磁気センサーを使用した場合には、
同図の曲線（破線）■に示すように磁石５Ａ、５Ｂの回
転面近傍のみに小さな出力が現れるにすぎない。In that case, as shown by the rectangular wave in Figure 6, the distance from the magnet rotation surface is within ±8 (3), the constant 400 mV.In addition, when using a conventional magnetic sensor,
As shown by the curve (broken line) ■ in the figure, a small output appears only near the rotating surfaces of the magnets 5A and 5B.
発明の効果
本発明によれば、磁気センサーは１個でしかも回転体の
ケーシングのいずれの位置にあっても感興の高い検出が
できるとともに、設計上の自由度が大きく、コストダウ
ンをはがることができるという優れた効果を奏する。Effects of the Invention According to the present invention, even if only one magnetic sensor is placed at any position on the casing of a rotating body, highly impressive detection can be performed, and the degree of freedom in design is large, leading to cost reduction. It has the excellent effect of being able to
第ｔ ｔａは本発明の実施例で用いた斜板式圧縮機の断
面図、第２図は斜板の回転角と検出電圧の関係を示すグ
ラフ、第３図は磁気センサーを示す斜視図（一部断面図
）、第４図は別例を示す斜視図（一部断面図）、第５図
は磁石回転面からの距離と出力との関係を示すグラフ、
第６図は別例における磁石回転面からの距離と出力との
関係を示すグラフ、第７図は従来の斜板式圧ｔＩ機の断
面図、第８図及び第９図は従来技術における斜板の回転
角と検出電圧の関係を示すグラフである。
ＩＡ、ＩＢ・・・シリンダブロック、４・・・斜板、５
Ａ、５Ｂ・・・磁石、１１・・・ボルト、１４・・・磁
気センサー、１６・・・アモルファスワイヤ、１７・・
・コイルtta is a cross-sectional view of the swash plate compressor used in the embodiment of the present invention, FIG. 2 is a graph showing the relationship between the rotation angle of the swash plate and the detected voltage, and FIG. 4 is a perspective view (partial sectional view) showing another example, and FIG. 5 is a graph showing the relationship between the distance from the magnet rotation surface and the output.
Fig. 6 is a graph showing the relationship between the distance from the magnet rotating surface and the output in another example, Fig. 7 is a cross-sectional view of a conventional swash plate type pressure tI machine, and Figs. 8 and 9 are swash plates in the conventional technology. 3 is a graph showing the relationship between rotation angle and detected voltage. IA, IB...Cylinder block, 4...Swash plate, 5
A, 5B... Magnet, 11... Volt, 14... Magnetic sensor, 16... Amorphous wire, 17...
·coil
Claims (3)
回転子に取着された磁石と、ケーシングに設けられ前記
磁石によって磁化される磁性材よりなるボルトと、同ボ
ルト又はその近傍に設けられ前記ボルトからの磁束を検
知するウィガンド効果を利用したパルス型の磁気センサ
ーとを備えたことを特徴とする圧縮機における回転検出
装置。1. A magnet attached to a rotor rotatably provided inside a casing of a compressor, a bolt made of a magnetic material provided in the casing and magnetized by the magnet, and a bolt provided at or near the same bolt. A rotation detection device for a compressor, comprising a pulse type magnetic sensor that uses the Wigand effect to detect magnetic flux from the compressor.
所設けられたものである特許請求の範囲第１項に記載の
圧縮機における回転検出装置。2. The rotation detection device for a compressor according to claim 1, wherein the magnetic sensor is provided at one location on the outer surface of the casing or on the bolt.
して弾性応力を残留させたコアと、同コアの外周に巻装
したコイルとから構成したものである特許請求の範囲第
１項に記載の圧縮機における回転検出装置。3. The compressor according to claim 1, wherein the magnetic sensor is composed of a core in which an amorphous alloy wire is spirally wound to retain residual elastic stress, and a coil wound around the outer periphery of the core. Rotation detection device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62057763A JPH0810230B2 (en) | 1987-03-12 | 1987-03-12 | Rotation detection device in compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62057763A JPH0810230B2 (en) | 1987-03-12 | 1987-03-12 | Rotation detection device in compressor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63222217A true JPS63222217A (en) | 1988-09-16 |
| JPH0810230B2 JPH0810230B2 (en) | 1996-01-31 |
Family
ID=13064916
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62057763A Expired - Fee Related JPH0810230B2 (en) | 1987-03-12 | 1987-03-12 | Rotation detection device in compressor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0810230B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5540560A (en) * | 1993-04-14 | 1996-07-30 | Kabushiki Kaisha Toyoda Jidoshokki Seisakusho | Compressor with rotation detecting mechanism |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5814058A (en) * | 1981-07-17 | 1983-01-26 | Aisin Seiki Co Ltd | Rotation signal generator |
| JPS6190263U (en) * | 1984-11-20 | 1986-06-12 |
-
1987
- 1987-03-12 JP JP62057763A patent/JPH0810230B2/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5814058A (en) * | 1981-07-17 | 1983-01-26 | Aisin Seiki Co Ltd | Rotation signal generator |
| JPS6190263U (en) * | 1984-11-20 | 1986-06-12 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5540560A (en) * | 1993-04-14 | 1996-07-30 | Kabushiki Kaisha Toyoda Jidoshokki Seisakusho | Compressor with rotation detecting mechanism |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0810230B2 (en) | 1996-01-31 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |