JPH01222690A - Negative-phase operation preventive circuit for rotary type compressor - Google Patents
Negative-phase operation preventive circuit for rotary type compressorInfo
- Publication number
- JPH01222690A JPH01222690A JP62272971A JP27297187A JPH01222690A JP H01222690 A JPH01222690 A JP H01222690A JP 62272971 A JP62272971 A JP 62272971A JP 27297187 A JP27297187 A JP 27297187A JP H01222690 A JPH01222690 A JP H01222690A
- Authority
- JP
- Japan
- Prior art keywords
- phase
- circuit
- light
- photocoupler
- phases
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000003449 preventive effect Effects 0.000 title 1
- 239000003990 capacitor Substances 0.000 claims abstract description 18
- 238000000819 phase cycle Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 3
- 230000018199 S phase Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 210000001161 mammalian embryo Anatomy 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2270/00—Control; Monitoring or safety arrangements
- F04C2270/70—Safety, emergency conditions or requirements
- F04C2270/72—Safety, emergency conditions or requirements preventing reverse rotation
Landscapes
- Control Of Positive-Displacement Pumps (AREA)
- Control Of Ac Motors In General (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は三相交流電源の相回転方向の検出に係り、特に
回転形圧縮機の逆相運転、欠相運転の防止に好適な回転
形圧縮機の逆相運転防止回路に関する。[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to the detection of the phase rotation direction of a three-phase AC power supply, and is particularly suitable for detecting the phase rotation direction of a three-phase AC power supply, and is particularly suitable for preventing reverse-phase operation and open-phase operation of a rotary type compressor. This invention relates to a compressor negative phase operation prevention circuit.
従来のこの種の相回転検出回路は特開昭５９−１７３５
９３号に記載され、第１回に示すように、Ｒ相にコンデ
ンサＣＩ 、８相に交流継電器Ｘ１のコイル、Ｔ相に抵
抗器Ｒ１で構成されている。A conventional phase rotation detection circuit of this type is disclosed in Japanese Patent Application Laid-Open No. 59-1735.
No. 93, and as shown in Part 1, it consists of a capacitor CI in the R phase, an AC relay X1 coil in the 8-phase, and a resistor R1 in the T-phase.
相回転方向がＲ，Ｓ、Ｔの場合には、交流継電器Ｘ１の
コイルには線間電圧■より大きな電圧ＶＬがかかり交流
継電器Ｘ１は動作する。相回転方向がＲ、Ｔ 、Ｓの場
合には、交流継電器Ｘ１のコイルには線間電圧■より小
さな電圧Ｖｓがかかり、交流継電器Ｘ１は動作しないよ
うになっていた。 ・この交流継電器Ｘ１の
接点を用いて相回転方向がＲ，Ｓ、Ｔの時のみ圧縮機を
運転するようにしていた。When the phase rotation direction is R, S, or T, a voltage VL larger than the line voltage (2) is applied to the coil of the AC relay X1, and the AC relay X1 operates. When the phase rotation direction is R, T, or S, a voltage Vs smaller than the line voltage ■ is applied to the coil of the AC relay X1, and the AC relay X1 does not operate. - The compressor was operated only when the phase rotation direction was R, S, or T using the contacts of this AC relay X1.
上記従来技術では、交流継電器Ｘ１が不動作中でもコイ
ルには電圧がかかっているため、動作が不安定状態にお
かれており、振動・衝撃、ノイズ・サージ電圧などで誤
動作を起こす可能性がある。交流継電器は商用電源のた
め、絶縁距離等の面から小形化に限界がある。また、制
御回路に電子回路を用いる際に直接、交流継電器の接点
を取り込むためにはインターフェース回路が必要となる
などの欠点があった。In the above-mentioned conventional technology, voltage is applied to the coil even when the AC relay . Since AC relays use commercial power, there are limits to miniaturization due to insulation distance and other considerations. Furthermore, when an electronic circuit is used in the control circuit, there is a drawback that an interface circuit is required to directly incorporate the contacts of the AC relay.
上記目的は、機械的な接点を介さず、電子回路で交流電
源の底流変化を検出することにより達成される。The above object is achieved by detecting changes in the undercurrent of an AC power source using an electronic circuit without using mechanical contacts.
第２図に示すように、三相交流電源の各２相間に抵抗と
コンデンサ全直列に接続した回路を通してダイオードと
フォトカプラの発光側の発光ダイオードケ逆並列接続し
た回路を設ける。抵抗及びコンデンサはフォトカプラの
電流制限として作用する。入力電圧がＳ−Ｔ間の電圧が
正の場合はフォトカプラの発光側ダイオードに電流が流
れフォトカプラの受光側トランジスタがＯＮする。Ｓ−
Ｔ間の電圧が負の場合はフォトカプラの発光側ダイオー
ドは逆方向となり電流が流れないためこれに逆並列接続
されたダイオードに電流が流れるため、フォトカプラ受
光側トランジスタはＯＦＦ’する。これを８−Ｔ、Ｔ−
１間で行うと第３図の如くなる。すなわちＳ−Ｔ間に設
けたフォトカプラの受光側トランジスタがＯＮした直後
ではＴ−１間に設けたフォトカプラの受光側トランジス
タば０１１ｉ’Ｆ 、 Ｓ−Ｔ間に設けたフォトカプラ
の受光側のトランジスタがＯＦＦした直後ではＴ−１間
に設けたフォトカプラの受光側トランジスタＶ′１ＯＮ
となる。これが逆相となった場合第４図の如く第３図と
逆に、Ｓ−Ｔ間に設けたフォトカプラの受光側トランジ
スタがＯＮした直後ではＴ−１間に設けたフォトカプラ
の受光側トランジスタはＯＮ、８−Ｔ間に設けたフォト
カプラの受光側のトランジスタがＯＮした直後ではＴ−
１間に設けたフォトカプラの受光側のトランジスタはＯ
Ｆ’Ｆとなる。又、Ｔ相が欠相した場合は第５図の如（
Ｓ−Ｔ間、Ｔ−１間のフォトカプラの受光側トランジス
タは同時にＯＮ、ＯＦＦする。このためＳ−Ｔ間に設け
たフォトカプラの受光側トランジスタのＯＮ 、 ＯＦ
’Ｆ’直後のＴ−８間に設けたフォトカブラの受光側ト
ランジスタのＯＮ 、ｏｐＦは逆相の時と同一の動作と
なる。As shown in FIG. 2, a circuit is provided in which a diode and a light emitting diode on the light emitting side of a photocoupler are connected in antiparallel through a circuit in which a resistor and a capacitor are connected in series between each two phases of a three-phase AC power source. The resistor and capacitor act as current limits for the optocoupler. When the input voltage between ST and T is positive, current flows through the light-emitting side diode of the photocoupler and the light-receiving side transistor of the photocoupler is turned on. S-
If the voltage across T is negative, the light emitting side diode of the photocoupler is in the opposite direction and no current flows, so current flows through the diode connected antiparallel to it, and the photocoupler light receiving side transistor is turned OFF'. This is 8-T, T-
If it is done for 1 hour, it will look like Figure 3. That is, immediately after the light-receiving side transistor of the photocoupler provided between ST and T is turned on, the light-receiving side transistor of the photocoupler provided between T-1 is 011i'F, and the light-receiving side transistor of the photocoupler provided between S and T is Immediately after the transistor is turned off, the photo-receiving side transistor V'1 of the photocoupler installed between T-1 is ON.
becomes. If this becomes a reverse phase, as shown in Figure 4, contrary to Figure 3, immediately after the light-receiving side transistor of the photocoupler installed between ST and T is turned on, the light-receiving side transistor of the photocoupler installed between T-1 is ON, and immediately after the transistor on the light receiving side of the photocoupler placed between 8 and T is turned on, T- is ON.
The transistor on the light receiving side of the photocoupler placed between
It becomes F'F. Also, if the T phase is open, as shown in Figure 5 (
The light-receiving side transistors of the photocoupler between ST and T-1 are turned on and off at the same time. For this reason, the ON and OFF of the light-receiving side transistor of the photocoupler provided between ST and
The ON and opF of the light-receiving side transistor of the photocoupler provided between T-8 immediately after 'F' operate in the same manner as when the phase is reversed.
前記の内容をマイクロコンピュータ等で判断し逆相又は
欠相の場合は圧縮機を停止するようにする。The above contents are judged by a microcomputer, etc., and the compressor is stopped in the case of reverse phase or open phase.
以下、本発明の一実施例を第６図により説明する。三相
交流電源の各２相聞に抵抗２及びコンデンサ３を直列に
接続した回路を通してダイオード６とフォトカプラ７の
発光側の発光ダイオードを逆並列に接続し、フォトカプ
ラ７の受光側トランジスタのコレクタを５ＶＤＣ電源に
抵抗８で接続した上抵抗９，１１でトランジスタ１３に
接続し、トランジスタ１３のコレクタ１５ＶＤｃ電源に
抵抗１２で接続した上マイクロコンピュータ２７０入力
端子に接続する。回路を形成する。この回路と同一の回
路金側に持ち、それぞれＳ−Ｔ相間及びＴ−Ｒ相間に接
続する。An embodiment of the present invention will be described below with reference to FIG. The diode 6 and the light-emitting diode on the light-emitting side of the photocoupler 7 are connected in antiparallel through a circuit in which a resistor 2 and a capacitor 3 are connected in series between each two phases of a three-phase AC power supply, and the collector of the light-receiving side transistor of the photocoupler 7 is connected. The collector of the transistor 13 is connected to a 5VDC power supply through a resistor 8, the transistor 13 is connected to a 15VDC power supply through a resistor 12, and the collector of the transistor 13 is connected to a microcomputer 270 input terminal. form a circuit. It is held on the same circuit gold side as this circuit, and connected between the S-T phase and the T-R phase, respectively.
本回路において抵抗２、コンデンサ３はフォトカプラ７
の発光ダイオードへの電流制限回路として働く、コンデ
ンサ４、抵抗５はフォトカプラ７の０１１ｉ’Ｆ時のデ
ィスチャージ用の回路である。In this circuit, resistor 2 and capacitor 3 are photocoupler 7
A capacitor 4 and a resistor 5, which function as a current limiting circuit for the light emitting diode, are a circuit for discharging the photocoupler 7 at the time of 011i'F.
又Ｔ−Ｒ相側同側回路素子一の働きをする。It also functions as the circuit element on the same side of the TR phase side.
ここでＳ−Ｔ間の電圧が正の場合、電流は抵抗２、コン
デンサ３全通して７オトカプラ７の発光ダイオードに流
れるため、フォトカプラ７の受光トランジスタがＯＮす
る。このため受光トランジスタのコレクタ電位は０■と
なり抵抗９，１１を通してトランジスタ１３のベースへ
電流を流ｆことが出来ないためトランジスタ１３はＯＦ
Ｆ’する。このためマイクロコンピュータの入力端子２
８はｒＨＪとなる。逆にＳ−Ｔ相聞が負の場合は、電流
は、フォトカプラ７の発光ダイオードへは流れず、ダイ
オード６を通してコンデンサ３及び抵抗２全通して流れ
るためフォトカプラ７の受光トランジスタはＯＦ’Ｆ’
する。受光トランジスタのコレクタは電位はｒＨＪレベ
ルとなるため抵抗９゜１１を通してトランジスタ１３の
ペースへｔａ が流れトランジスタ１３がＯＮする。こ
れによりトランジスタ１３のコレクタがｒＬＪとなりマ
イコン入力端子２８はｒＬＪとなる。コンデンサ１０は
ノイズ除去用として使用する。ここでＴ−Ｒ相間の回路
もＳ−Ｔ間と同一の動作原理で動作する８、Ｔ、Ｈの各
相を正常に接続した場合の波形を第３図に示す。ここで
はフォトカプラ７及び２０の受光トランジスタの０Ｎ−
ＯＦ’Ｆ’で示しである。受光トランジスタがＯＮの時
、前述の如くマイコン入力はｒＨＪレベルである。８−
Ｔ間の７オトカプラ７の受光トランジスタがＯＦＦ’か
らＯＮした直後のＴ−Ｒ間のフォトカプラ２０の受光ト
ランジスタはＯＦ’Ｆ’であり、Ｓ−Ｔ間のフォトカプ
ラ７の受光トランジスタがＯＮからＯＦ’ＰＬ。Here, when the voltage between ST and T is positive, the current flows through the resistor 2 and capacitor 3 to the light emitting diode of the 7-opto coupler 7, so that the light receiving transistor of the photo coupler 7 is turned on. Therefore, the collector potential of the light-receiving transistor becomes 0, and current cannot flow through the resistors 9 and 11 to the base of the transistor 13, so the transistor 13 is turned off.
F' to do. Therefore, input terminal 2 of the microcomputer
8 becomes rHJ. Conversely, when the S-T phase is negative, the current does not flow to the light emitting diode of the photocoupler 7, but flows through the diode 6, the capacitor 3, and the resistor 2, so the light receiving transistor of the photocoupler 7 becomes OF'F'.
do. Since the potential of the collector of the light-receiving transistor is at the rHJ level, ta flows to the base of the transistor 13 through the resistor 9.11, and the transistor 13 is turned on. As a result, the collector of the transistor 13 becomes rLJ, and the microcomputer input terminal 28 becomes rLJ. Capacitor 10 is used for noise removal. FIG. 3 shows the waveforms when the 8, T, and H phases, in which the circuit between the T and R phases operates on the same operating principle as the circuit between the S and T phases, are normally connected. Here, the light receiving transistors of photocouplers 7 and 20 are 0N-
It is indicated by OF'F'. When the light receiving transistor is ON, the microcomputer input is at the rHJ level as described above. 8-
Immediately after the light receiving transistor of the photocoupler 7 between T and T is turned on from OFF', the light receiving transistor of the photocoupler 20 between T and R is OF'F', and the light receiving transistor of the photocoupler 7 between S and T is turned on from ON. OF'PL.
た場合のＴ−Ｒ間のフォトカプラ２０の受光トランジス
タはＯＮとなっている。これは前述のフォトカプラとマ
イコン入力端子の関係から、マイコン入力端子２８が立
上がった直後はマイコン入力端子２９は「Ｌ」、２８が
立下がった直後は「Ｈ」となる。In this case, the light receiving transistor of the photocoupler 20 between TR is turned on. This is because of the relationship between the photocoupler and the microcomputer input terminal described above, so that immediately after the microcomputer input terminal 28 rises, the microcomputer input terminal 29 becomes "L", and immediately after the microcomputer input terminal 28 falls, it becomes "H".
８、Ｔ、Ｒ相の方向を逆にした場合を第４図に示す。図
に示す如く、正常時とは逆に、マイコン入力端子２９は
マイコン入力端子２８が立上った直後「Ｈ」、立下がっ
た直後「Ｌ」となる。FIG. 4 shows a case where the directions of the 8, T and R phases are reversed. As shown in the figure, contrary to the normal state, the microcomputer input terminal 29 becomes "H" immediately after the microcomputer input terminal 28 rises, and becomes "L" immediately after it falls.
またＴ相を欠相させた場合、電流はＳ−Ｔ間電圧正の時
抵抗２、コンデンサ３、フォトカプラ７、抵抗１５、コ
ンデンサ１６、フォトカプラ２０を通して流れ、負の時
はダイオード１９、コンデンサ１６、抵抗１５、ダイオ
ード６、コンデンサ３、抵抗２全通して流れるため、フ
ォトカプラの発光ダイオードが光る位相は同じとなる。When the T phase is open, the current flows through the resistor 2, capacitor 3, photocoupler 7, resistor 15, capacitor 16, and photocoupler 20 when the S-T voltage is positive, and flows through the diode 19 and the capacitor when it is negative. 16, resistor 15, diode 6, capacitor 3, and resistor 2, the light emitting diodes of the photocoupler light up in the same phase.
このときの波形を第５図に示す。この場合でも、マイコ
ン入力端子２９Ｖｉマイコン入力端子２８の立上り直後
「Ｈ」立下り直後「し」となる。以上により第７図のフ
ローチャートに示すように前述の回路分用いて、マイコ
ン入力端子２９がマイコン入力端子の立上り直後「Ｌ」
、立下り直後ｒＨＪならば正常、立上り直後「Ｈ」、
立下り直後ｒＬＪならば逆相接続又は欠相と容易に判断
でき、この場合、圧縮機を０ＦＦ（、て逆相及び欠相運
転を防止できる。また、欠相の場合、Ｒ，Ｓ相の入相が
考えられるが、電子回路図の電源の供給源をＲ−８相か
ら取れば、Ｒ，Ｓ相欠同時は電子回路が動作しないため
、圧縮機運転指令が出ないようにすることができる。The waveform at this time is shown in FIG. Even in this case, the microcomputer input terminal 29Vi becomes "H" immediately after the microcomputer input terminal 28 rises, and becomes "off" immediately after the microcomputer input terminal 28 falls. As shown in the flowchart of FIG. 7, the microcomputer input terminal 29 becomes "L" immediately after the rise of the microcomputer input terminal by using the circuit described above.
, If it is rHJ immediately after falling, it is normal, “H” immediately after rising,
If it is rLJ immediately after falling, it can be easily determined that there is a reverse phase connection or an open phase, and in this case, the compressor can be turned to OFF (0FF) to prevent reverse phase and open phase operation.In addition, in the case of an open phase, the R and S phases Phase input is possible, but if the power supply source of the electronic circuit diagram is taken from the R-8 phase, the electronic circuit will not operate if the R and S phases are interrupted at the same time, so it is possible to prevent the compressor operation command from being issued. can.
第８図は三相電源の入力部にダイオードブリッジ３０．
３３を用いてホトカプラ７．２０に電流を流す方式で波
形を検知する回路である。第８図の回路を用いるとリレ
ー等の負荷３１．３４を直列に接続しても波形の検知が
行える。抵抗３２゜３５はホトカプラ７．２０の発光ダ
イオードの電流制限抵抗である。Figure 8 shows a diode bridge 30.
This is a circuit that detects a waveform by using a photocoupler 7.33 and passing a current through the photocoupler 7.20. When the circuit shown in FIG. 8 is used, waveforms can be detected even when loads 31, 34 such as relays are connected in series. Resistors 32 and 35 are current limiting resistors for the light emitting diodes of photocouplers 7 and 20.
本発明によれば、交流継電益金使用しなくても良いため
、
（１）小形化が可能
（２）電子回路とのインターフ、−ス不要（３）回路の
不安定状態がなく、振動・衝撃・ノイズ・サージ電圧な
どの外乱に強い。According to the present invention, since there is no need to use an AC relay, (1) miniaturization is possible (2) there is no need to interface with electronic circuits (3) there is no unstable state of the circuit, and vibrations and Strong against disturbances such as shock, noise, and surge voltage.
などの効果がある。There are effects such as
第１図は従来の回路図、第２図は発明の基本回路図、第
３図は、正常接続時の波形図、第４図は逆相接続時の波
形図、第５図は欠相時の波形図、第６図は本発明の一実
施例の回路図、第７図は本発明の実施例の制御フローチ
ャートである。
Ｃ１・・・コンデンサ Ｘｌ・・・交流継電器 Ｒ
１・・・抵抗 ＰＣＩ、ＰＣ２・・・フォトカプラ２
．１５・・・抵抗 ３．１６・・・コンデンサ ６
．１９・・・ダイオード ７．２０・・・フォトカプ
ラ１３．２６・・・トランジスタ ２７・・・マイク
ロコンピュータ。
第１、図
第２Ｍ
Ｃｌ・ コンザシ＋＋ＰＣ１フ寸トカフ０うＲ１１氏用
’Ｌ ＰＣｚ フォトカプラ×１−文流垢
Ｖｌ電も
第３図
第４図
丁−ン藺
。Ｆ′
１２．１５−中＆＊”４ ７．２にＬ＝７１ｔＪ
７Ｖ’う３．１６・・コ５テ゛°シガ ２ｑ ・マイ
７０コ比１−タｂ、１つ・グイオード゛
事件の表示
昭和 ６２年特許願第 ２７２９７１、発明の名称
回転膨圧縮機の逆相運転防止回路
補正をする者
軒１と加持 特許出願人
名 称 （５１０）株式会社 日 立 製 作所代
理 人
氏 名 （６８５０） ブ「 理 士 小
月１ 勝 男袖止命令の１１付
平成 」年 ３月２８目（発送「１）補 正 の 対
象 明細胚の図面の簡単な説明の欄補正 の 内
容 別紙のとおり
・■建か
糸 也
１、明細書第１０頁第５行「・・・・・・フローチャー
ト」と「である。」の間に［、第８図は本発明の他の実
施例の電気回路図」を加入する。
以上
′ でヲFigure 1 is a conventional circuit diagram, Figure 2 is a basic circuit diagram of the invention, Figure 3 is a waveform diagram for normal connection, Figure 4 is a waveform diagram for reverse phase connection, and Figure 5 is for phase loss. FIG. 6 is a circuit diagram of an embodiment of the present invention, and FIG. 7 is a control flow chart of an embodiment of the present invention. C1...Capacitor Xl...AC relay R
1...Resistor PCI, PC2...Photocoupler 2
．． 15...Resistor 3.16...Capacitor 6
．． 19...Diode 7.20...Photocoupler 13.26...Transistor 27...Microcomputer. 1st, Fig. 2 M Cl・Contact + PC1 cuff 0 R11's L PCz Photocoupler x 1
. F'
12.15-medium&*”4 7.2 to L=71tJ
7V'u3.16...Ko5te Shiga 2q My70koratio1-Tab,1Giode Incident Display Showa 1962 Patent Application No. 272971, Name of Invention Reverse Phase of Rotary Expansion Compressor Name of patent applicant (510) Hitachi, Ltd.
Physician's name (6850) ``Science'' 1 month per month 11th issue of order to stop men from wearing sleeves
March 28, 2019 (shipped ``1'') Target of amendment Contents of amendment to the column for the brief explanation of the drawing of the detailed embryo As shown in the attached document: ■ Tatekaitoya 1, page 10, line 5 of the specification Between ". . . flowchart" and "is.", insert "Fig. 8 is an electric circuit diagram of another embodiment of the present invention". That's all
Claims (1)
商用三相交流電源の各２相間に抵抗とコンデンサを直列
に接続した回路を通してダイオードと光結合素子の発光
側の発光ダイオードを逆並列接続した回路を設け、それ
ぞれの発光ダイオード側に流れる電流の変化により、三
相交流電源の相方向を検出することにより圧縮機への逆
相接続及び、欠相状態で圧縮機を運転することを防止す
ることを特徴とする回転形圧縮機の逆相運転防止回路。In the control circuit of an air conditioner equipped with a rotary compressor,
A circuit is established in which a diode and a light-emitting diode on the light-emitting side of an optocoupler are connected in antiparallel through a circuit in which a resistor and a capacitor are connected in series between each two phases of a commercial three-phase AC power supply, and changes in the current flowing through each light-emitting diode are established. A method for preventing reverse phase operation of a rotary compressor, which is characterized by detecting the phase direction of a three-phase AC power supply and thereby preventing reverse phase connection to the compressor and operation of the compressor in an open phase state. circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62272971A JPH01222690A (en) | 1987-10-30 | 1987-10-30 | Negative-phase operation preventive circuit for rotary type compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62272971A JPH01222690A (en) | 1987-10-30 | 1987-10-30 | Negative-phase operation preventive circuit for rotary type compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01222690A true JPH01222690A (en) | 1989-09-05 |
Family
ID=17521344
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62272971A Pending JPH01222690A (en) | 1987-10-30 | 1987-10-30 | Negative-phase operation preventive circuit for rotary type compressor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01222690A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104459355A (en) * | 2013-09-24 | 2015-03-25 | 珠海格力电器股份有限公司 | Phase sequence detection device |
| CN111043707A (en) * | 2019-12-31 | 2020-04-21 | 海信（山东）空调有限公司 | Compressor reverse rotation detection method and air conditioner |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62107697A (en) * | 1985-11-01 | 1987-05-19 | Mitsubishi Electric Corp | Controller for air conditioner |
| JPS62185592A (en) * | 1986-02-07 | 1987-08-13 | Mitsubishi Electric Corp | Protecting device for air conditioner |
-
1987
- 1987-10-30 JP JP62272971A patent/JPH01222690A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62107697A (en) * | 1985-11-01 | 1987-05-19 | Mitsubishi Electric Corp | Controller for air conditioner |
| JPS62185592A (en) * | 1986-02-07 | 1987-08-13 | Mitsubishi Electric Corp | Protecting device for air conditioner |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104459355A (en) * | 2013-09-24 | 2015-03-25 | 珠海格力电器股份有限公司 | Phase sequence detection device |
| CN111043707A (en) * | 2019-12-31 | 2020-04-21 | 海信（山东）空调有限公司 | Compressor reverse rotation detection method and air conditioner |
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