JP2685314B2 - Compressor - Google Patents
CompressorInfo
- Publication number
- JP2685314B2 JP2685314B2 JP31350489A JP31350489A JP2685314B2 JP 2685314 B2 JP2685314 B2 JP 2685314B2 JP 31350489 A JP31350489 A JP 31350489A JP 31350489 A JP31350489 A JP 31350489A JP 2685314 B2 JP2685314 B2 JP 2685314B2
- Authority
- JP
- Japan
- Prior art keywords
- lubricating oil
- refrigerant
- capacitance type
- type detector
- compressor
- 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.)
- Expired - Fee Related
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- Control Of Positive-Displacement Pumps (AREA)
Description
【発明の詳細な説明】 ［発明の目的］ （産業上の利用分野） この発明は圧縮機に係り、特に潤滑油及び冷媒の状態
を検知する静電容量式検出器を備えた圧縮機に関する。Description: [Object of the invention] (Field of industrial application) The present invention relates to a compressor, and more particularly to a compressor including a capacitance type detector for detecting the states of lubricating oil and refrigerant.
（従来の技術） 一般に、ヒートポンプ装置は、液化しやすいガス（冷
媒ガス）を圧縮機で圧縮せしめて高圧高温状態にした後
に、凝縮器で放熱して液化させ、この冷媒液を膨張器で
膨張させ、蒸発器で周囲の被冷却媒体より熱を奪って気
化させ、再び圧縮機に吸入する冷凍サイクルを実現して
いる。(Prior Art) Generally, a heat pump device compresses a gas (refrigerant gas) that is easily liquefied by a compressor to a high pressure and high temperature state, radiates heat in a condenser to liquefy, and expands this refrigerant liquid in an expander. In this way, a refrigeration cycle is realized in which heat is taken from the surrounding medium to be cooled by the evaporator to be vaporized and then sucked into the compressor again.
第12図は、このようなヒートポンプ装置に用いられる
圧縮機の従来例を示している。同図中、１は密閉容器で
あり、その下方側部には、冷媒ガスの吸入管２が取付け
られ、上部中央には吐出管３が取付けられている。吸入
管２が上述の蒸発器に接続され、吐出管３が凝縮器に接
続されている。密閉容器１内には、底部側にロータリコ
ンプレッサ機構からなる圧縮機構部４が装備され、その
上部には、これを駆動するための電動機５が装備されて
いる。６は電動機の回転軸、７はロータ、８はステー
タ、９はステータ巻線、11はリード線、12は外部端子で
ある。また、13は圧縮機構部のシリンダ、14は副軸、15
は副軸受けである。16は機潤滑油であり、密閉容器１の
底部に貯留されている。16aは潤滑油液面である。潤滑
油16は、圧縮機の運転中に、上方に汲上げられ、密閉容
器１内を循環することにより圧縮機構部４及び電動機５
の回転部及び摺動部を潤滑するようになっている。FIG. 12 shows a conventional example of a compressor used in such a heat pump device. In the figure, reference numeral 1 is a closed container, a suction pipe 2 for the refrigerant gas is attached to the lower side portion thereof, and a discharge pipe 3 is attached to the center of the upper portion. The suction pipe 2 is connected to the above-mentioned evaporator, and the discharge pipe 3 is connected to the condenser. Inside the closed container 1, a compression mechanism section 4 including a rotary compressor mechanism is provided on the bottom side, and an electric motor 5 for driving the compression mechanism section 4 is provided on the upper side. 6 is a rotating shaft of an electric motor, 7 is a rotor, 8 is a stator, 9 is a stator winding, 11 is a lead wire, and 12 is an external terminal. Further, 13 is a cylinder of the compression mechanism portion, 14 is a counter shaft, and 15
Is a sub-bearing. 16 is machine lubricating oil, which is stored at the bottom of the closed container 1. 16a is the lubricating oil level. The lubricating oil 16 is pumped upward during the operation of the compressor, and circulates in the closed container 1 so that the compression mechanism section 4 and the electric motor 5 are
It is designed to lubricate the rotating part and the sliding part.
ところで、ヒートポンプ装置では、特に冬期等におい
て、装置が停止している期間で装置周囲の温度が下がっ
た場合、サイクル中の冷媒ガスが液化して圧縮機内へ液
状で戻る、いわゆる寝込み現象が起る。ａ矢印は、この
冷媒の液戻り方向を示している。圧縮機が寝込みの状態
になると、元来圧縮機内に入っている潤滑油16が冷媒で
希釈される。この状態で圧縮機が運転された場合、初期
的には潤滑油16の粘性が低下しているために、潤滑が不
十分になって圧縮機内の回転部及び摺動部のロック事故
や摩耗故障が起り易い。そして、さらに運転が続けられ
ると、圧縮機の発熱による潤滑油の加熱等により潤滑油
中に溶込んでいた冷媒が沸騰し、潤滑油が発泡現象を起
して吐出管３より冷媒ガスと共に圧縮機外へ吐出される
ことが確認されている。この結果、圧縮機内の潤滑油が
減少して回転部及び摺動部のロック事故や摩耗故障を引
起こし寿命を低下させることになる。By the way, in a heat pump device, especially in winter, when the temperature around the device is lowered during a period in which the device is stopped, the refrigerant gas in the cycle is liquefied and returns to the compressor in a liquid state, a so-called stagnation phenomenon occurs. . The arrow a indicates the liquid return direction of this refrigerant. When the compressor is in a stagnation state, the lubricating oil 16 originally contained in the compressor is diluted with the refrigerant. When the compressor is operated in this state, the viscosity of the lubricating oil 16 is initially low, so that lubrication becomes insufficient and the rotating and sliding parts in the compressor are locked and have a wear failure. Is likely to occur. Then, when the operation is further continued, the refrigerant dissolved in the lubricating oil is boiled by the heating of the lubricating oil due to the heat generation of the compressor, and the lubricating oil causes a foaming phenomenon to be compressed together with the refrigerant gas from the discharge pipe 3. It has been confirmed that it is discharged to the outside of the machine. As a result, the amount of lubricating oil in the compressor is reduced, which causes lock accidents and wear failures of the rotating portion and the sliding portion, which shortens the life.
このため、従来から潤滑油中の冷媒溶込み量や潤滑油
油面等の潤滑油の状態を圧縮機構部４下方の密閉容器１
の内側壁に近い位置に設けた一対の平行平板電極を用い
てその誘電率の変化で検出し、その出力を用いてロック
や摩耗事故を防止するように圧縮機の負荷を軽減させる
等の冷凍サイクルを制御する手段が講じられている。ま
た、17は圧縮機をヒートアッブして潤滑油中に溶込んで
いる冷媒を気化させるための巻線ヒータである。Therefore, conventionally, the amount of refrigerant permeating into the lubricating oil and the state of the lubricating oil such as the surface of the lubricating oil are controlled by the closed container 1 below the compression mechanism section 4.
A pair of parallel plate electrodes installed near the inner wall of the compressor is used to detect the change in the dielectric constant, and the output is used to reduce the load on the compressor to prevent locks and wear accidents. Means are taken to control the cycle. Reference numeral 17 is a winding heater for heating the compressor to vaporize the refrigerant dissolved in the lubricating oil.
（発明が解決しようとする課題） 従来の圧縮機では、潤滑油中への冷媒の溶込み量や潤
滑油油面等の潤滑油の状態を一対の平行平板電極を用い
て検出していた。しかし、一対の平行平板電極では、次
に述べるように、潤滑油中への冷媒の溶込み量と潤滑油
油面とを同時に検知することはできず、それぞれ独立し
た専用の検出器が必要になってしまう。(Problems to be Solved by the Invention) In a conventional compressor, the amount of refrigerant permeating into the lubricating oil and the state of the lubricating oil such as the lubricating oil surface are detected using a pair of parallel plate electrodes. However, with a pair of parallel plate electrodes, as described below, it is not possible to detect the penetration amount of the refrigerant into the lubricating oil and the lubricating oil surface at the same time. turn into.
即ち、まず第13図に示すように、一対の平行平板電極
18を圧縮機内の潤滑油の減少限界である枯渇レベルｂ以
下に埋没するように設けた場合、潤滑油16への冷媒溶込
み量（潤滑油の稀釈度）は検知できるが、潤滑油の枯渇
状態は検知不可能である。That is, first, as shown in FIG. 13, a pair of parallel plate electrodes
When 18 is installed so as to be buried below the depletion level b, which is the limit of reduction of lubricating oil in the compressor, the amount of refrigerant penetration into the lubricating oil 16 (dilution degree of lubricating oil) can be detected, but depletion of lubricating oil The condition is undetectable.
また、第14図に示すように、一対の平行平板電極18を
潤滑油枯渇レベルｂ以上で且つ通常の潤滑油油面レベル
16a間に設置した場合は、潤滑油の枯渇検知（潤滑油の
油面検知）は可能であるが、潤滑油に冷媒が溶込んだ場
合を考慮すると、液冷媒の比誘電率は6.6で潤滑油の比
通電率は２であり、液冷媒の比誘電率は潤滑油のそれに
対して３倍以上も大きいため、潤滑油中への冷媒溶込み
が起っているのか、正味の潤滑油油面が上昇しているの
か判別するのは困難となる。また、潤滑油油面16aより
上部に検出器を設けたとしても潤滑油の油面は測定でき
ないことは言うまでもない。In addition, as shown in FIG. 14, the pair of parallel plate electrodes 18 are connected to each other at a lubricating oil depletion level b or more and at a normal lubricating oil surface level.
When installed between 16a, it is possible to detect the depletion of the lubricating oil (detection of the oil surface of the lubricating oil), but considering the case where the refrigerant has melted into the lubricating oil, the relative permittivity of the liquid refrigerant is 6.6 The specific conductivity of oil is 2, and the relative permittivity of liquid refrigerant is three times or more as large as that of lubricating oil. Therefore, whether the refrigerant has melted into the lubricating oil, the net lubricating oil It is difficult to determine if the surface is rising. Needless to say, even if a detector is provided above the lubricating oil surface 16a, the lubricating oil surface cannot be measured.
したがって、従来の圧縮機では潤滑油中への冷媒の溶
込み量と潤滑油油面とは、一対の平行平板電極で同時に
正確に検知することは寝込みによる静電容量の増大を考
慮すると極めて困難である。このため、正確な冷凍サイ
クルの制御が困難になり、圧縮機の信頼性の低下を招く
という問題があった。一方、潤滑油中への冷媒の溶込み
量と潤滑油油面とをそれぞれ独立した検出器を用いて同
時に検知するようにした場合には、狭い密閉容器内にお
いて検出器の配設領域がスペース的に大きくなってしま
うとともに、両検出器の位置決め等に手数がかかる。さ
らに、検出器の出力を外部へ取出すためのそれぞれ独立
したハーメチックシールからなるターミナル（端子）が
必要になってコスト面でも不利となる。Therefore, in the conventional compressor, it is extremely difficult to accurately detect the amount of refrigerant penetration into the lubricating oil and the lubricating oil surface at the same time with a pair of parallel plate electrodes, considering the increase in capacitance due to stagnation. Is. Therefore, there is a problem that it is difficult to control the refrigeration cycle accurately and the reliability of the compressor is reduced. On the other hand, when the amount of refrigerant penetration into the lubricating oil and the lubricating oil surface are detected simultaneously using independent detectors, the detector installation area is limited to a space in a narrow closed container. In addition to the large size, it takes time to position both detectors. Further, it is necessary to provide terminals (hermetically sealed seals) for extracting the output of the detector to the outside, which is disadvantageous in terms of cost.
そこで、この発明は、潤滑油中への冷媒の溶込み量と
潤滑油油面とを小形で且つ出力取出し用端子数の少ない
静電容量式検出器を用いて同時に正確に検知することが
できて高信頼性の得られる圧縮機を提供することを目的
とする。Therefore, according to the present invention, the amount of refrigerant permeated into the lubricating oil and the surface of the lubricating oil can be accurately detected at the same time by using a small capacitance detector having a small number of output extraction terminals. It is an object of the present invention to provide a compressor with high reliability.
［発明の構成］ （課題を解決するための手段） この発明は上記課題を解決するために、容器内に電動
機部及び該電動機部で駆動される圧縮機構部とこれらを
潤滑する潤滑油とが収容され、当該容器内に吸入した冷
媒を圧縮して吐出するとともに当該潤滑油及び冷媒の状
態を静電容量の変化として検知する静電容量式検出器を
備えた圧縮機であって、前記静電容量式検出器における
対向電極の一方は共通電極とし、他方は複数に分割して
当該各分割部により前記潤滑油の枯渇レベルを検知する
枯渇検知部及び該潤滑油への冷媒溶込み量を検知する冷
媒溶込み量検知部を構成してなることを要旨とする。[Structure of the Invention] (Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention provides an electric motor unit, a compression mechanism unit driven by the electric motor unit, and a lubricating oil for lubricating them in a container. A compressor provided with a capacitance type detector that stores the refrigerant sucked into the container and discharges the compressed refrigerant, and detects the state of the lubricating oil and the refrigerant as a change in capacitance. One of the opposing electrodes in the capacitance type detector is a common electrode, and the other is divided into a plurality of parts, and a depletion detection part for detecting the depletion level of the lubricating oil by each divided part and a refrigerant penetration amount into the lubricating oil. The gist of the present invention is to configure a coolant penetration amount detection unit for detection.
また、前記静電容量式検出器における他方の電極の分
割点は、前記潤滑油の枯渇レベル近傍に形成してなるこ
ともこの発明の要旨して包含する。It is also included in the gist of the present invention that the division point of the other electrode in the capacitance type detector is formed near the depletion level of the lubricating oil.
（作用） 静電容量式検出器における対向電極の一方は共通電極
とされ、他方は複数に分割されてその各分割部により枯
渇検知部と冷媒溶込み量検知部とが構成され、枯渇検知
部で潤滑油の枯渇レベルが検知され、これと同時に冷媒
溶込み量検知部で潤滑油への冷媒溶込み量が検知され
る。そして、潤滑油への冷媒の溶け込みが起っても、冷
媒溶込み量検知部で検知れた冷媒溶込み量から、その時
の油量を判定することができて潤滑油中への冷媒の溶込
み量と潤滑油の枯渇レベル即ち油面とを同時に正確に検
知することが可能となり、これらの検出値から冷凍サイ
クルを正確に制御することが可能となる。(Function) One of the opposing electrodes in the capacitance type detector is a common electrode, and the other is divided into a plurality of parts, and each divided part constitutes a depletion detection part and a refrigerant penetration amount detection part. The depletion level of the lubricating oil is detected at the same time, and at the same time, the refrigerant penetration amount detection unit detects the refrigerant penetration amount into the lubricating oil. Even if the refrigerant melts into the lubricating oil, it is possible to determine the amount of oil at that time from the amount of refrigerant permeated detected by the refrigerant permeation amount detection unit, and the amount of refrigerant melted into the lubricating oil can be determined. It is possible to accurately detect the amount of oil trapped and the depletion level of the lubricating oil, that is, the oil level at the same time, and it is possible to accurately control the refrigeration cycle based on these detected values.
また、静電容量式検出器は、その一方の電極が、分割
された他方の電極に対し兼用してなる構成のため、その
出力取出し用端子の一部を共通化することできて出力取
出し用端子数を少なくすることが可能となる。In addition, since one electrode of the capacitance type detector is also used for the other divided electrode, some of the output extraction terminals can be shared and output It is possible to reduce the number of terminals.
したがって、冷凍サイクルの正確な制御と、ハーメチ
ックシール等で構成される出力取出し用端子数が少なく
なること等により、圧縮機の信頼性の向上が可能とな
る。Therefore, it is possible to improve the reliability of the compressor by accurately controlling the refrigeration cycle and reducing the number of output take-out terminals including hermetic seals.
（実施例） 以下、この発明の実施例を図面に基づいて説明する。Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
第１図ないし第６図は、この発明の第１実施例を示す
図である。1 to 6 are views showing a first embodiment of the present invention.
なお、以下の各実施例を示す図において、前記第12図
ないし第14図における部材及び部位等と同一ないし均等
のものは、前記と同一符号を以って示し、重複した説明
を省略する。In the drawings showing the respective embodiments below, the same or equivalent members and parts as those in FIGS. 12 to 14 are designated by the same reference numerals, and the duplicated description will be omitted.
この実施例では、密閉容器１内における圧縮機構部の
シリンダ13下方の狭い位置に次のような構造の静電容量
式検出器20が配設されている。In this embodiment, a capacitance type detector 20 having the following structure is arranged in a narrow position below the cylinder 13 of the compression mechanism in the closed container 1.
即ち、静電容量式検出器20における対向した平行平板
電極のうちの一方の電極は共通の兼用電極21とされ、他
方の電極は、分割部24により上部電極22と下部電極23に
分割されている。そして、上部電極22と兼用電極21で潤
滑油の枯渇レベルを検知する枯渇検知部が構成され、下
部電極23と兼用電極21で潤滑油への冷媒溶込み量（稀釈
度）を検知する冷媒溶込み量検知部が構成されている。
25はスペーサ用絶縁体である。第２図は、静電容量式検
出器20の等価回路を示している。C0は上部電極静電容
量、Crは下部電極静電容量、26は上部電極出力端子、27
は下部電極出力端子、28は兼用電極出力端子であり、２
つの検知部に対し出力端子数は３個となっている。That is, one electrode of the parallel plate electrodes facing each other in the capacitance type detector 20 is a common shared electrode 21, and the other electrode is divided into an upper electrode 22 and a lower electrode 23 by the dividing portion 24. There is. Then, the upper electrode 22 and the dual-purpose electrode 21 constitute a depletion detection unit that detects the depletion level of the lubricating oil, and the lower electrode 23 and the dual-purpose electrode 21 detect the refrigerant penetration amount (dilution degree) into the lubricating oil. A jamming amount detection unit is configured.
25 is an insulator for spacers. FIG. 2 shows an equivalent circuit of the capacitance type detector 20. C 0 is the upper electrode capacitance, Cr is the lower electrode capacitance, 26 is the upper electrode output terminal, 27
Is a lower electrode output terminal, 28 is a dual-purpose electrode output terminal, and 2
The number of output terminals for each detector is three.
第３図は、静電容量式検出器20を、上部電極22の下端
が潤滑油枯渇レベルｂに位置するように密閉容器１内の
シリンダ13下方に取付けた状態を示している。同図は、
潤滑油16の油面が上部電極22の上端を満たすレベルにあ
る場合を示している。ここで潤滑油油面が順次低下し、
油面枯渇レベルｂまで低下した場合の上部電極22及び下
部電極23の静電容量特性を第４図に示す。同図中、ｄは
上部電極22の上端潤滑油レベル、ｅは下部電極23の上端
潤滑油レベルである。油面の低下に伴ない上部電極23の
静電容量値が徐々に低下し、油面が枯渇レベルｂに達す
ると静電容量は最低値となりこれ以上下がらないことよ
り潤滑油油面の枯渇状態を検知することができる。FIG. 3 shows a state in which the capacitance type detector 20 is mounted below the cylinder 13 in the closed container 1 so that the lower end of the upper electrode 22 is located at the lubricating oil depletion level b. The figure shows
The case where the oil level of the lubricating oil 16 is at a level that fills the upper end of the upper electrode 22 is shown. Here, the lubricating oil level gradually decreases,
The capacitance characteristics of the upper electrode 22 and the lower electrode 23 when the oil level depletion level b is lowered are shown in FIG. In the figure, d is the upper end lubricating oil level of the upper electrode 22, and e is the upper end lubricating oil level of the lower electrode 23. As the oil level decreases, the capacitance value of the upper electrode 23 gradually decreases, and when the oil level reaches the exhaustion level b, the electrostatic capacitance becomes the minimum value and does not decrease further. Can be detected.
また、ある潤滑油レベルｆで冷媒の寝込みが起った場
合は、冷媒の比誘電率が潤滑油のそれより３倍以上大き
いために、第５図に示すように静電容量は大幅に増大
し、上部電極22のその静電容量値から判断すると潤滑油
は十分であるかのように見えるが、この実施例では一体
化した下部電極23で潤滑油の稀釈度も同時に測定するこ
とが可能であるため、どの程度の冷媒が溶込んで潤滑油
が稀釈され液面が上昇しているかが検知でき、その稀釈
度からその時の油量を判定し正確な冷凍サイクル制御を
行うことができ、圧縮機はもとより空気調和装置の信頼
性を大幅に向上することが可能となる。Further, when the refrigerant stagnation occurs at a certain lubricating oil level f, the relative permittivity of the refrigerant is three times or more larger than that of the lubricating oil, so that the electrostatic capacitance increases significantly as shown in FIG. However, judging from the capacitance value of the upper electrode 22, it seems that the lubricating oil is sufficient, but in this embodiment, the dilution ratio of the lubricating oil can be measured at the same time with the integrated lower electrode 23. Therefore, it is possible to detect how much of the refrigerant has melted to dilute the lubricating oil and raise the liquid level, and it is possible to perform accurate refrigeration cycle control by determining the amount of oil at that time from the degree of dilution, The reliability of the air conditioner as well as the compressor can be greatly improved.
また、第３図の電極取付け例では、兼用電極出力端子
28をハーメチックシールの専用取出し端子で密閉容器外
へ導いていたが、密閉容器本体は通常導体であることか
ら第６図に示すように、兼用電極出力端子28は密閉容器
本体へ直接電気的に接続することも可能である。このよ
うな構造を用いることにより端子数をさらに削減するこ
とができ、コスト低減及び信頼性向上の点で一層有利と
なる。Also, in the electrode mounting example of FIG. 3, the dual-purpose electrode output terminal
28 was led to the outside of the hermetically sealed container with a dedicated hermetically sealed terminal, but since the hermetically sealed container body is a normal conductor, the dual-purpose electrode output terminal 28 is electrically connected directly to the hermetically sealed container body as shown in FIG. It is also possible to connect. By using such a structure, the number of terminals can be further reduced, which is further advantageous in terms of cost reduction and reliability improvement.
次に、第７図ないし第９図には、この発明の第２実施
例における静電容量式検出器30を示す。Next, FIGS. 7 to 9 show a capacitance type detector 30 according to a second embodiment of the present invention.
この実施例の静電容量式検出器30は、第７図及び第８
図に示すように、上部電極22及び下部電極23を間に挟む
ようにして２枚の兼用電極21、29が設けられている。こ
の２枚の兼用電極21、29を並列接続することにより静電
容量値の増大を図ることができ、静電容量の変化をさら
に大きく取出すことができる。この静電容量式検出器30
の密閉容器内への取付け態様を第８図に示す。また、こ
の静電容量式検出器30においても、出力端子部に前記第
６図と同様な接続を施すことによりコスト低減及び信頼
性向上と共に、密閉容器と電極間の浮遊静電容量をも取
除くことができ対ノイズ性も向上する。このときの取付
け構造例を第９図に示す。The capacitance type detector 30 of this embodiment is shown in FIGS.
As shown in the figure, two dual-purpose electrodes 21 and 29 are provided so as to sandwich the upper electrode 22 and the lower electrode 23 therebetween. By connecting the two dual-purpose electrodes 21 and 29 in parallel, it is possible to increase the capacitance value, and it is possible to obtain a larger change in capacitance. This capacitance type detector 30
FIG. 8 shows the manner of attachment of the above into the closed container. Also in this capacitance type detector 30, by connecting the output terminal portion in the same manner as in FIG. 6, cost reduction and reliability improvement as well as floating capacitance between the closed container and the electrode can be obtained. It can be removed and noise resistance is improved. An example of the mounting structure at this time is shown in FIG.
上述した各実施例における静電容量式検出器におい
て、上部電極22では第10図に示すように潤滑油の粘性か
ら表面張力によりその電極の下端以下に油面がきても潤
滑油が残留し、検知精度を低下させる場合が考えられ
る。これに対しては、第11図に示すように、上部電極22
の下端の電極間距離を広げた構造の静電容量式検出器40
とすることにより容易に解決が可能である。In the capacitance type detector in each of the embodiments described above, in the upper electrode 22, the lubricating oil remains even if the oil surface comes below the lower end of the electrode due to the surface tension from the viscosity of the lubricating oil as shown in FIG. 10, The detection accuracy may be reduced. In contrast, as shown in FIG. 11, the upper electrode 22
Capacitance type detector 40 with a structure in which the distance between the electrodes at the lower end of the
By doing so, it is possible to easily solve the problem.
［発明の効果］ 以上説明したように、この発明によれば、静電容量式
検出器における対向電極の一方を共通電極とし、他方を
複数に分割してその分割部により枯渇検知部と冷媒溶込
み量検知部とを構成し、枯渇検知部で潤滑油の枯渇レベ
ルを検知し、冷媒溶込み量検知部で潤滑油への冷媒溶込
み量を検知するようにしたため、潤滑油中への冷媒の溶
込みが起っても、冷媒溶込み量検知部で検知した冷媒溶
込み量から、その時の油量を判定することができて潤滑
油中への冷媒の溶込み量と潤滑油の枯渇レベル即ち油面
とを正確に検知することが可能となり、これらの検出値
から冷凍サイクルを正確に制御することができる。ま
た、静電容量式検出器は小形に構成することができて容
器内の狭い取付けスペースに対し容易取付け性が得ら
れ、さらには出力取出し用端子数を少なくすることがで
きる。したがって、冷凍サイクルの正確な制御と、ハー
メチックシール等で構成される出力取出し用端子数の減
少等とが相まって圧縮機の信頼性を顕著に向上させるこ
とができる。[Effects of the Invention] As described above, according to the present invention, one of the counter electrodes in the capacitance type detector is used as a common electrode, the other is divided into a plurality of parts, and the depletion detection part and the refrigerant melt are divided by the divided parts. The depletion detector detects the level of lubricating oil depletion, and the refrigerant penetration amount detector detects the amount of refrigerant penetration into the lubricating oil. Even if the penetration of oil occurs, the amount of oil at that time can be determined from the amount of refrigerant penetration detected by the refrigerant penetration amount detection unit, and the amount of penetration of the refrigerant into the lubricating oil and the depletion of the lubricating oil The level, that is, the oil level can be accurately detected, and the refrigeration cycle can be accurately controlled from these detected values. Further, the capacitance type detector can be constructed in a small size, and can be easily attached to a small installation space in the container, and further, the number of terminals for output extraction can be reduced. Therefore, the accurate control of the refrigeration cycle and the reduction in the number of output extraction terminals including hermetic seals can be combined to significantly improve the reliability of the compressor.
第１図なしい第６図はこの発明に係る圧縮機の第１実施
例を示すもので、第１図は静電容量式検出器部分の斜視
図、第２図は上記静電容量式検出器の等価回路を示す回
路図、第３図は密閉容器内への上記静電容量式検出器の
取付け態様の一例を示す構成図、第４図は上記静電容量
式検出器の出力特性を示す特性図、第５図は寝込み時の
上記静電容量式検出器の出力特性を示す特性図、第６図
は密閉容器内への静電容量式検出器の取付け態様の他の
例を示す構成図、第７図ないし第９図はこの発明の第２
実施例を示すもので、第７図は静電容量式検出器部分の
斜視図、第８図は密閉容器内への上記静電容量式検出器
の取付け態様の一例を示す構成図、第９図は密閉容器内
への上記静電容量式検出器の取付け態様の他の例を示す
構成図、第10図は潤滑油の表面張力による影響を示す
図、第11図はこの発明の第３実施例における静電容量式
検出器を示す縦断面図、第12図乃至第14図は従来例を示
す図である。 1:密閉容器、2:吸入管、 3:吐出管、4:圧縮機構部、 5:電動機、16:潤滑油、 20、30、40:静電容量式検出器、 21、29:兼用電極（共通電極）、 22:上部電極、23:下部電極、 26:上部電極出力端子、 27:下部電極出力端子、 28:兼用電極出力端子。FIG. 1 and FIG. 6 show a first embodiment of the compressor according to the present invention. FIG. 1 is a perspective view of a capacitance type detector part, and FIG. 2 is the capacitance type detection device. Fig. 3 is a circuit diagram showing an equivalent circuit of the capacitance device, Fig. 3 is a configuration diagram showing an example of a mode of mounting the capacitance type detector in a closed container, and Fig. 4 shows output characteristics of the capacitance type detector. Fig. 5 shows a characteristic diagram, Fig. 5 shows a characteristic diagram showing the output characteristic of the capacitance type detector when lying down, and Fig. 6 shows another example of the manner of mounting the capacitance type detector in a closed container. FIG. 7 is a block diagram of the second embodiment of the present invention.
FIG. 7 shows an embodiment, FIG. 7 is a perspective view of a capacitance type detector portion, FIG. 8 is a configuration diagram showing an example of a mode of mounting the capacitance type detector in a closed container, and FIG. FIG. 10 is a constitutional view showing another example of the manner of mounting the above capacitance type detector in a closed container, FIG. 10 is a diagram showing the influence of the surface tension of lubricating oil, and FIG. 11 is the third of the present invention. FIG. 12 to FIG. 14 are vertical cross-sectional views showing a capacitance type detector in the embodiment, and FIGS. 12 to 14 are views showing a conventional example. 1: Airtight container, 2: Suction pipe, 3: Discharge pipe, 4: Compression mechanism part, 5: Electric motor, 16: Lubricating oil, 20, 30, 40: Capacitance type detector, 21, 29: Combined electrode ( Common electrode), 22: upper electrode, 23: lower electrode, 26: upper electrode output terminal, 27: lower electrode output terminal, 28: dual-purpose electrode output terminal.
Claims (2)
れる圧縮機構部とこれらを潤滑する潤滑油とが収容さ
れ、当該容器内に吸入した冷媒を圧縮して吐出するとと
もに当該潤滑油及び冷媒の状態を静電容量の変化として
検知する静電容量式検出器を備えた圧縮機であって、 前記静電容量式検出器における対向電極の一方は共通電
極とし、他方は複数に分割して当該各分割部により前記
潤滑油の枯渇レベルを検知する枯渇検知部及び該潤滑油
への冷媒溶込み量を検知する冷媒溶込み量検知部を構成
してなることを特徴とする圧縮機。1. An electric motor unit, a compression mechanism unit driven by the electric motor unit, and a lubricating oil that lubricates the electric motor unit are housed in a container, and the refrigerant sucked into the container is compressed and discharged. And a compressor provided with a capacitance type detector that detects the state of the refrigerant as a change in capacitance, wherein one of the counter electrodes in the capacitance type detector is a common electrode and the other is divided into a plurality of parts. Then, each of the divided parts constitutes a depletion detection part for detecting a depletion level of the lubricating oil and a refrigerant penetration amount detection part for detecting a refrigerant penetration amount into the lubricating oil. .
の分割点は、前記潤滑油の枯渇レベル近傍に形成してな
ることを特徴とする請求項１記載の圧縮機。2. The compressor according to claim 1, wherein a division point of the other electrode in the capacitance type detector is formed near the depletion level of the lubricating oil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31350489A JP2685314B2 (en) | 1989-12-04 | 1989-12-04 | Compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31350489A JP2685314B2 (en) | 1989-12-04 | 1989-12-04 | Compressor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03175180A JPH03175180A (en) | 1991-07-30 |
| JP2685314B2 true JP2685314B2 (en) | 1997-12-03 |
Family
ID=18042109
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP31350489A Expired - Fee Related JP2685314B2 (en) | 1989-12-04 | 1989-12-04 | Compressor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2685314B2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6003638B2 (en) * | 2012-12-28 | 2016-10-05 | ダイキン工業株式会社 | Refrigeration equipment |
| KR102073011B1 (en) | 2013-12-18 | 2020-03-02 | 삼성전자주식회사 | Oil detecting apparatus, compressor having the same and method for controlling compressor |
| KR102342565B1 (en) * | 2014-12-30 | 2021-12-23 | 삼성전자주식회사 | Oil level detecting apparatus and control method thereof, oil flow detecting apparatus and control method thereof, method for control oil return using oil level and oil flow |
| JP6778783B2 (en) * | 2019-04-19 | 2020-11-04 | 株式会社鷺宮製作所 | Liquid detector, compressor and air conditioner |
| EP4010048A1 (en) * | 2019-08-09 | 2022-06-15 | Baxter International Inc. | Capacitive priming sensor for a medical fluid delivery system |
-
1989
- 1989-12-04 JP JP31350489A patent/JP2685314B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03175180A (en) | 1991-07-30 |
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